JP2024056783A - Systems and programs - Google Patents

Abstract

[Problem] To provide a technology for notifying a user of the presence of a light emitting device that emits light of a specific wavelength. [Solution] Electronic device 10 is a system installed in a vehicle. Electronic device 10 has a light receiving unit that selects and receives light of a specific wavelength from incident light and outputs a signal according to the amount of received light, and a control unit that performs first notification control to notify a user of the presence of a light emitting device that emits light of the specific wavelength based on the signal output by the light receiving unit. [Selected Figure] Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Law has been filed. Posting address: https://www.yupiteru.co.jp/products/radar/ls300/ https://www.yupiteru.co.jp/products/radar/ls300/function.html https://www.yupiteru.co.jp/products/radar/ls300/spec.html https://www.yupiteru.co.jp/products/radar/ls300/option.html html https://www. yupiteru. co. jp/products/radar/ls300/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/LS300. pdf https://www. yupiteru. co. jp/products/radar/gs103/ https://www. yupiteru. co. jp/products/radar/gs103/function. html https://www. yupiteru. co. jp/products/radar/gs103/spec. html https://www. yupiteru. co. jp/products/radar/gs103/option. html https://www. yupiteru. co. jp/products/radar/gs103/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/GS103. pdf https://www. yupiteru. co. jp/products/radar/a350alpha/ https://www. yupiteru. co. jp/products/radar/a350alpha/function. html https://www. yupiteru. co. jp/products/radar/a350alpha/spec. html https://www. yupiteru. co. jp/products/radar/a350alpha/option. html

Application for application of Article 30, paragraph 2 of the Patent Law has been filed. https://www.yupiteru.co.jp/products/radar/a350alpha/support.html https://my.yupiteru.co.jp/upload/save_image/manual/pdf/A350Alpha.pdf https://www.yupiteru.co.jp/products/radar/wr70/ https://www.yupiteru.co.jp/products/radar/wr70/function. html https://www. yupiteru. co. jp/products/radar/wr70/spec. html https://www. yupiteru. co. jp/products/radar/wr70/option. html https://www. yupiteru. co. jp/products/radar/wr70/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/WR70. pdf http://driver-box. yaesu-net. co. jp/new-article/15326/ (Published on March 15, 2019)

Application for application of Article 30, Paragraph 2 of the Patent Law has been filed. Posting address: https://www.yupiteru.co.jp/products/radar/z100l/ https://www.yupiteru.co.jp/products/radar/z100l/function.html https://www.yupiteru.co.jp/products/radar/z100l/spec.html https://www.yupiteru.co.jp/products/radar/z100l/option.html html https://www. yupiteru. co. jp/products/radar/z100l/support. html https://my. yupiteru. co. jp/upload/save_image/manual/pdf/Z100L. pdf (Published on March 29, 2019) Published on March 15, 2019 in Car Goods Magazine, May 2019 issue, page 25, San-ei Shobo Published on March 18, 2019 in Car Goods Press vol. 88, page 35, published by Tokuma Shoten Published on March 20, 2019 Driver May 2019 issue, page 7, published by Yaesu Publishing Published on March 26, 2019 Best Car April 26, 2019 issue, pages 150-151, published by Kodansha

The present invention relates to a system, a program, etc.

There are various types of systems that measure the speed of vehicles traveling on roads. In the case of the radar type, a speed measuring device installed along the road emits microwaves in a specific frequency band toward the vehicle, receives the reflected waves from the vehicle, and measures the vehicle's traveling speed.

It may be useful for users, such as vehicle drivers, to know in advance the presence of a speed measuring device. Patent documents 1 and 2 disclose electronic devices that receive microwaves emitted from a vehicle speed measuring device and output an alarm if they detect the presence of a vehicle speed measuring device.

JP 2008-64588 A JP 2017-96728 A

The moving speed of an object can also be measured using light. In this optical method, a light emitting device emits light toward an object and receives the reflected wave from the object to measure the moving speed. Even when such an optical speed measuring device is installed, it is desirable to be able to notify the user of its presence. One of the objects of the present invention is to provide a technology for notifying the user of the presence of a light emitting device that emits light of a specific wavelength.

The purpose of the invention of this application is not limited to this, and the applicant intends to obtain rights to configurations that aim to obtain effects from parts of the configurations disclosed in this specification and drawings, etc., through divisional applications, amendments, etc. For example, this specification discloses problems in which the phrase "can be" in this specification is read as "the problem is that...". The problems are described as independent, and the applicant intends to obtain rights to the configurations for solving each problem separately through divisional applications, amendments, etc. Even if the problems are implicitly understood from the description in the specification, the applicant intends to include part of the configurations described in this specification in the scope of the patent claim by amendment or divisional application. The applicant has also disclosed a configuration that solves a problem that combines these independent problems, and the applicant intends to obtain rights to it.

(1) A system that is provided in a vehicle and that notifies the presence of a device that detects the presence of the vehicle by emitting light of a specific wavelength, the system comprising: a focusing lens including an entrance surface having an aspheric curved surface and an exit surface from which light that is incident on the entrance surface exits; and a light receiving element that receives the light that is exited from the exit surface;
and a control unit that performs control to notify the presence of the light emitting device based on the light of the specific wavelength received by the light receiving element.

In this way, a technology can be provided for notifying a user of the presence of a light-emitting device that emits light of a specific wavelength. In particular, by using a focusing lens with an entrance surface that has an aspherical curved surface, the light-receiving element can receive light coming from a wide range in a specified direction, making it possible to more reliably notify the user of the presence of a light-emitting device.

The light emitting device may be a device that emits light whose energy is distributed in at least a narrower wavelength range than the disturbance light. The disturbance light may be light other than the target light to be received. The specific wavelength may be a wavelength at which the energy of the light emitted by the light emitting device is at its peak. The specific wavelength may be a wavelength that is not perceived by humans, and may have energy at a specific wavelength outside the visible light range, for example. The specific wavelength may belong to the infrared light range, and may be 905 nm. The specific wavelength is not limited to this, and may be 850, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device is at its peak. The wavelength different from the specific wavelength may be a wavelength included in the visible light range. The amount of light received may indicate the amount of light of a specific wavelength selected and received by the light receiving unit. Selecting a wavelength may mean selecting some wavelengths from a certain wavelength range and not selecting at least some other wavelengths. Notification control can refer to control that notifies information in a manner that can be recognized by the user.

(2) The entrance surface may include a convex curved surface along the width direction of the vehicle.

In this way, the light receiving element can receive light coming from a wide area in the width direction of the vehicle, so the presence of the light emitting device can be more reliably notified.

(3) The length of the entrance surface in the width direction of the vehicle may be greater than the length in the height direction of the vehicle.

In this way, the light receiving element can receive light coming from a wide area in the width direction of the vehicle, so the presence of the light emitting device can be more reliably notified.

(4) The entrance surface may include a convex curved surface along both the width direction and the height direction of the vehicle.

In this way, the light receiving element can receive light coming from a wide range of directions, making it possible to more reliably notify the presence of a light emitting device.

(5) The entrance surface may include a convex curved surface along the width direction of the vehicle and a flat curved surface along the height direction of the vehicle.

In this way, the light receiving element can receive light coming from a wide area in the width direction of the vehicle, so the presence of the light emitting device can be more reliably notified.

(6) The emission surface may include a flat surface.

In this way, the light receiving element can receive light coming from a wide area in the width direction of the vehicle, so the presence of the light emitting device can be more reliably notified.

(7) The light receiving element may be positioned closer to the focusing lens than the focal length position of the focusing lens.

In this way, the light receiving element can be positioned closer to the focusing lens than the focal distance position, allowing light with a wide angle of incidence to be received.

(8) The control unit may be configured to perform control to notify the presence of the device when the pulse width of the light received by the light receiving unit is within a certain range from a reference pulse width.

Referring to the pulse width of the received light can be useful in detecting a light-emitting device that emits a specific pulse of light. This can reduce alerts that mistakenly identify ambient light as light from a light-emitting device.

(9) The control unit may perform control to notify the presence of the light-emitting device when pulsed light having a pulse width of 20 ms is received.

In this way, it is possible to measure the vehicle speed and alert the presence of a lighting device that is conducting enforcement.

(10) The control unit may be configured to perform control to notify the presence of the device when the pulse interval of the light received by the light receiving unit is within a certain range from a reference pulse interval.

Referring to the pulse interval of the received light can be useful in detecting a light-emitting device that emits a specific pulse of light. This can reduce alerts that mistakenly identify ambient light as light from a light-emitting device.

(11) The control unit may perform control to notify the presence of the light-emitting device when pulsed light with a pulse interval of 80 ms is received.

In this way, it is possible to measure the vehicle speed and alert the presence of a lighting device that is conducting enforcement.

(12) The control unit may change the level of the notification depending on at least one of the pulse width and pulse interval of the light received by the light receiving unit.

This way, users can see how important the content of the notification is.

(13) The control unit may perform control to notify the presence of the light-emitting device when a pulse of light of the specific wavelength is received at least once.

This allows the user to immediately know that a fermentation device exists.

(14) It is preferable that the optical element has a reflecting portion that reflects at least a portion of the light emitted from the focusing lens toward the light receiving element.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(15) The reflecting portion may be provided at a position different from the optical path from the lens to the light receiving element, and may include a reflecting surface that reflects at least a portion of the light emitted from the lens toward the light receiving element.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(16) The reflecting surface may be arranged to surround the optical path.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(17) The reflecting section may include a member that is provided on the optical path from the lens to the light receiving element and that reflects at least a portion of the light emitted from the lens toward the light receiving element by utilizing total reflection of the light.

This increases the amount of light received by the light-receiving element from the light-emitting device, making it possible to more reliably notify the presence of the light-emitting device.

(18) The device may have an amplifier that amplifies a signal corresponding to the amount of light received from the light receiving element, and a differential amplifier that outputs a signal corresponding to the difference between the level of the amplified signal and a threshold level, and the control unit may perform control to notify the presence of the light emitting device based on the signal corresponding to the difference.

In this way, the amount of light received by the light receiving element from the light emitting device is amplified, making it possible to more reliably notify the presence of the light emitting device.

(19) The control unit may perform control to change the threshold level.

This reduces the possibility that the control to notify the presence of the light-emitting device will not be possible due to the influence of external light or electromagnetic noise.

(20) The control unit may set the threshold level to be greater than at least the level of light emitted by the equipment installed in the vehicle.

This reduces the possibility that control to notify the presence of the light-emitting device will not be possible due to the influence of light emitted by equipment installed in the vehicle.

(21) The device may have a substrate including a first surface on the collecting lens side and a second surface opposite the first surface, the light receiving element is provided on the second surface side of the substrate, and the substrate may be provided with a light transmitting portion for guiding light from the first surface side to the light receiving element.

In this way, the substrate is positioned between the light receiving element and the light receiving element lens, making it possible to effectively utilize the space equivalent to the focal length and reducing the overall thickness of the housing.

The present invention may also be specified as follows.
(A) Provided is a system that is installed in a vehicle and has a light receiving unit that selects and receives light of a specific wavelength from incident light and outputs a signal corresponding to the amount of light received, and a control unit that performs first notification control to notify of the presence of a light emitting device that emits light of the specific wavelength based on the signal output by the light receiving unit.

In this way, it is possible to provide a technology for notifying a user of the presence of a light-emitting device that emits light of a specific wavelength.

The light emitting device may be a device that emits light whose energy is distributed in at least a narrower wavelength range than the disturbance light. The disturbance light may be light other than the target light to be received. The specific wavelength may be a wavelength at which the energy of the light emitted by the light emitting device is at its peak. The specific wavelength may be a wavelength that is not perceived by humans, and may have energy at a specific wavelength outside the visible light range, for example. The specific wavelength may belong to the infrared light range, and may be 905 nm. The specific wavelength is not limited to this, and may be 850, 950 nm, 1900 nm, or other wavelengths. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device is at its peak. The wavelength different from the specific wavelength may be a wavelength included in the visible light range. The amount of light received may indicate the amount of light of a specific wavelength selected and received by the light receiving unit. Selecting a wavelength may mean selecting some wavelengths from a certain wavelength range and not selecting at least some other wavelengths. Notification control can refer to control that notifies information in a manner that can be recognized by the user.

(B) The control unit may be a system that performs the first notification control to display an animated image including an image that mimics the light-emitting device.

This makes it easier for users to recognize the presence of a light-emitting device that a vehicle is approaching.

(C) The control unit may be a system that performs the first notification control to display at least one of the attributes of the light-emitting device and the state of the vehicle in addition to the animation image.

In this way, the user can be made aware of at least one of the attributes of the light-emitting device and the vehicle's condition.

(D) The control unit may be a system that performs a second notification control different from the first notification control when the position of the vehicle has a predetermined relationship with the position of the light-emitting device.

In this way, the user can recognize whether they are approaching a light-emitting device that is the source of the light of a specific wavelength received by the system, or a light-emitting device that is identified based on the vehicle's position.

(E) The system may include a radio wave receiving unit that receives a specified radio wave, and the control unit may, upon receiving the specified radio wave, perform a third notification control to notify the presence of the radio wave generating device, and may stop the third notification control during the period in which the first notification control is being performed.

In this way, when reporting the presence of a light-emitting device with a specific wavelength, it is possible to avoid reporting the presence of a device that generates radio waves.

(F) The control unit may be a system that performs the third notification control to display an animated image including an image that mimics the generator.

This makes it easier for users to recognize that a radio wave generating device is approaching their vehicle.

(G) The control unit may perform a fourth notification control according to the positional relationship between the vehicle and other vehicles, and the system may perform the fourth notification control in parallel with the first notification control.

There are cases where the priority of reporting information according to the positional relationship between the vehicle and other vehicles is high. When the need for such reporting arises, the information according to the positional relationship between the vehicle and other vehicles can be reported even when the vehicle is approaching the light-emitting device.

(H) The control unit may be a system that stops the first notification control when the vehicle speed is less than a predetermined speed.

This can prevent unnecessary alerts from being issued when the vehicle speed is below a certain speed.

(I) When the position of the vehicle satisfies a predetermined condition, the control unit may perform the first notification control even if the speed of the vehicle is less than the specified speed.

In this way, depending on the vehicle's location, if the presence of a light-emitting device should be notified, this can be done even if the vehicle's speed is below a certain speed.

(K) The control unit may perform a fifth notification control to notify the status of the vehicle's occupants based on an image from a camera that captures the vehicle's interior, and the system may stop the fifth notification control while the first notification control is being performed.

In this way, when reporting the presence of a light-emitting device with a specific wavelength, it is possible to avoid reporting the status of the vehicle occupants.

(L) The system may have a housing having a light-transmitting section that transmits at least the specific wavelength of light, and the light-receiving section is disposed inside the housing and receives the specific wavelength of light from among the light incident through the light-transmitting section.

In this way, light of a specific wavelength can be received using the light receiving unit housed within the housing.

(M) The light receiving unit may have a first filter facing the light transmitting unit, a first light receiving element that receives light that has passed through the first filter, a second filter facing the light transmitting unit, and a second light receiving element that receives light that has passed through the second filter, and the housing may be a system having a first window corresponding to the first light receiving element and a second window corresponding to the second light receiving element.

In this way, the presence of a light-emitting device can be notified by using a configuration that uses at least two sets of light-receiving elements housed in a housing.

(N) The first light receiving element and the second light receiving element may be housed in a shielding case made of a conductive material, and the space in which the first light receiving element is housed and the space in which the second light receiving element is housed may be separated by a partition wall.

In this way, the signal output by the light receiving element is less susceptible to the effects of electromagnetic noise than if it were not shielded with a conductive material.

(O) A system having a display unit that displays an image, a first substrate that faces the display unit and has mounted thereon a control circuit that executes some or all of the functions of the control unit and a radio wave receiving unit that receives a specified radio wave, and a second substrate that faces the first substrate on the opposite side to the display unit and has mounted thereon the light receiving unit and a GNSS (Global Navigation Satellite System) receiving unit that is provided adjacent to the light receiving unit, wherein at least a portion of the radio wave receiving unit is mounted on the surface of the first substrate that faces the second substrate, and the second substrate is cut out in an area where at least a portion of the radio wave receiving unit is present.

This will help prevent the system from becoming too thick.

(P) The control unit controls the output of sound from a speaker, the speaker is provided adjacent to the GNSS receiving unit, and the speaker and the GNSS receiving unit are preferably positioned above the radio wave receiving unit.

This will help prevent the system from becoming too thick.

(Q) The second substrate may have a first region and a second region that is shorter in the vertical direction than the first region and protrudes upward than the first region, and the light receiving unit is mounted in the first region, and the GNSS receiving unit is mounted in the second region.

This will help prevent the system from becoming too thick.

(R) A system having a substrate on which the light receiving unit is mounted, an antenna unit that receives a predetermined radio wave, and a radio wave receiving unit having a processing circuit that processes a signal from the antenna, the antenna unit being disposed adjacent to the substrate, and the normal direction of the antenna unit intersecting with the normal direction of the substrate.

In this way, it is possible to provide technology for notifying users of the presence of a light-emitting device while minimizing changes to existing systems.

(S) The control unit may be a system that performs control to notify the presence of a light-emitting device that emits light of the specific wavelength when a predetermined reflective material pattern is recognized.

In this way, the presence of a light-emitting device can be reported in a location where its presence is highly likely, reducing the possibility of false alarms.

(T) A program is provided for causing a computer to realize the functions of the control unit of any of the above systems.

In this way, it is possible to provide a technology for notifying a user of the presence of a light-emitting device that emits light of a specific wavelength.

The inventions shown in (1) to (20) and (A) to (T) above can be combined in any way. For example, it is preferable to add at least a part of the configuration of at least one of the inventions from (2) onwards to all or a part of the configuration of the invention shown in (1). In particular, it is preferable to add at least a part of the configuration of at least one of the inventions from (2) onwards to the invention shown in (1). In addition, any configuration may be extracted from the inventions shown in (1) to (20) and (A) to (T) and the extracted configurations may be combined. The applicant of this application intends to acquire rights to the inventions including these configurations. In addition, even if there is a description such as "in the case of" or "when", it is not intended to describe the configuration as being limited to that case or time. These are examples of better configurations, and the applicant intends to acquire rights to configurations other than these cases or times. In addition, the parts described in order are not limited to this order. Configurations in which some parts have been deleted or the order has been changed are also disclosed, and the applicant intends to acquire rights.

The present invention makes it possible to notify a user of the presence of a light-emitting device that emits light of a specific wavelength.

The effects of the invention of this application are not limited to this, and effects achieved from the configuration parts disclosed in this specification and drawings, etc. are also disclosed, and it is the intention to obtain rights to the configuration that achieves said effects through divisional applications, amendments, etc. For example, in this specification, the parts that state "can..." are descriptions that clearly state the effect that is achieved, and there are also parts that show the effect even without the description "can...". Also, there are effects that can be understood from the configuration even without such descriptions.

1 is a diagram showing a configuration of an electronic device according to a first embodiment. 3 is a diagram showing an example of a waveform of pulsed light emitted by the speed measurement device according to the first embodiment. FIG. 2 is a rear view of the electronic device according to the first embodiment. 1 is a cross-sectional view of an electronic device according to a first embodiment. 1 is a cross-sectional view of an electronic device according to a first embodiment. 4A to 4C are diagrams illustrating an example of schematic characteristics of a first wavelength selecting section and a second wavelength selecting section according to the first embodiment. 1 is a block diagram showing an electrical configuration of an electronic device according to a first embodiment. 4 is a flowchart showing the operation of the electronic device according to the first embodiment. FIG. 4 is a diagram showing an example of a display screen of the electronic device according to the first embodiment. FIG. 4 is a diagram showing an example of a display screen of the electronic device according to the first embodiment. FIG. 4 is a diagram showing an example of a display screen of the electronic device according to the first embodiment. FIG. 4 is a diagram showing an example of a display screen of the electronic device according to the first embodiment. 5 is a flowchart showing the operation of the electronic device according to the first embodiment. FIG. 4 is a diagram showing an example of a display screen of the electronic device according to the first embodiment. 10A and 10B are diagrams illustrating an example of a waveform of pulsed light received by an electronic device according to a modified example of the first embodiment. FIG. 11 is a diagram showing an example of a display screen of an electronic device according to a modified example of the first embodiment. 10A and 10B are diagrams illustrating a reason why the number of pulses of pulsed light received by an electronic device according to a modified example of the first embodiment decreases. 10 is a flowchart showing an operation of an electronic device according to a modified example of the first embodiment. FIG. 13 is a diagram illustrating an overview of a system according to a second embodiment. 10 is a flowchart showing the operation of the electronic device according to the second embodiment. FIG. 11 is a diagram showing an example of a display screen of an electronic device according to a second embodiment. FIG. 13 is a block diagram showing the configuration of a system according to a third embodiment. 13A and 13B are diagrams illustrating an example of schematic characteristics of a first wavelength selecting section and a second wavelength selecting section according to the third embodiment. FIG. 13 is a block diagram showing an example of an arrangement of light receiving units in a system according to a third embodiment. FIG. 13 is a diagram showing an example of a circuit configuration of a light receiving unit according to a modified example. 1A to 1C are six views illustrating an example of an external configuration of an electronic device. 13 is a diagram showing an example of a notification screen displayed when an electronic device receives pulsed light from a mobile speed measurement device in another embodiment. FIG. 13 is a diagram showing an example of an animation image displayed in the information display area TA2. FIG. FIG. 29 is a diagram showing an example of an animation image following FIG. 28. 13 is a diagram showing an example of a notification screen displayed when an electronic device receives pulsed light from a mobile speed measurement device in another embodiment. FIG. FIG. 13 is a diagram showing an example of an animation image displayed in the information display area TA3. FIG. 32 is a diagram showing an example of an animation image following FIG. 31 . 13 is a diagram showing an example of a notification screen when a micro-type speed measuring device is detected in an electronic device according to another embodiment. FIG. FIG. 13 is a diagram showing an example of an animation image displayed in the information display area TA5. FIG. 35 is a diagram showing an example of an animation image following FIG. 34. FIG. 11 is a diagram showing the relationship between received microwaves and a notification method in another embodiment. 13 is a diagram showing the relationship between the detection method and the notification method of a speed measurement device in another embodiment. FIG. 13 is a diagram showing an example of a notification screen regarding a collision warning in another embodiment. 13 is a diagram illustrating a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. FIG. 13 is a diagram showing an example of a notification screen relating to a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. 13 is a diagram showing an example of a notification screen relating to a warning regarding inattentive driving and drowsy driving in another embodiment. FIG. 13 is a diagram illustrating a GPS warning in another embodiment. 13 is a table illustrating notification control performed by an electronic device according to another embodiment. 13 is a diagram showing a notification screen when an electronic device receives pulsed light from a mobile speed measurement device in another embodiment. FIG. FIG. 13 is a diagram showing a notification screen when a radar-based speed measurement device is detected in an electronic device according to another embodiment. 13A and 13B are diagrams illustrating notification timing and a notification method according to another embodiment. 13A and 13B are diagrams illustrating notification timing and a notification method according to another embodiment. 13A and 13B are diagrams illustrating notification timing and a notification method according to another embodiment. FIG. 13 is a perspective view illustrating an example of an external configuration of an electronic device according to another embodiment. 13A to 13C are six-sided views illustrating an example of an external configuration of an electronic device according to another embodiment. 13A to 13C are six-sided views illustrating an example of an external configuration of an electronic device according to another embodiment. FIG. 11 is a rear view of an electronic device with a lid removed according to another embodiment. FIG. 13 is an exploded perspective view of an electronic device according to another embodiment. FIG. 11 is a rear view illustrating a state in which the second housing is further removed from the electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. FIG. 13 is a photograph of a second substrate in another embodiment. FIG. 13 is a diagram illustrating an example of a configuration of a light receiving unit according to another embodiment. FIG. 11 is a diagram illustrating an example of a filter characteristic according to another embodiment. FIG. 1 is a diagram illustrating a configuration of an electronic device when a second substrate is removed; FIG. 13 is a perspective view showing an external configuration of an electronic device as another example according to another embodiment. FIG. 11 is a perspective view showing an external configuration of an electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. FIG. 11 is a perspective view showing an internal configuration of an electronic device according to another embodiment. 11A to 11C are diagrams illustrating a method for reducing noise in an electronic device according to another embodiment. FIG. 13 is a diagram illustrating another embodiment. FIG. 13 is a diagram illustrating another embodiment. FIG. 13 is a diagram illustrating another embodiment. FIG. 13 is a diagram illustrating another embodiment. 1 is a diagram showing a configuration of an electronic device according to an embodiment of the present invention, as viewed from diagonally above and to the right on the rear side. 1A to 1C are six-sided views illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. 1 is a diagram illustrating a state in which a second housing is removed from the electronic device of the present embodiment. FIG. 13 is a diagram showing a state in which a lens is further removed from the electronic device of the embodiment. 13 is a diagram showing a state in which a filter and a shield plate are further removed from the electronic device of the embodiment. FIG. FIG. 77 is a diagram of FIG. 76 with the substrate removed. FIG. 2 is a six-view diagram illustrating an example of a lens configuration according to the present embodiment. 1A and 1B are diagrams illustrating an experiment to confirm that an aspheric lens can receive light with a wide angle of incidence. FIG. 2 is a diagram illustrating an example of an electrical configuration of a light receiving unit according to the present embodiment. 1 is a diagram showing an example of a configuration in which a reflecting section is applied to the electronic device of the present embodiment; 1 is a diagram showing an example of a configuration in which a reflecting section is applied to the electronic device of the present embodiment; 3A and 3B are diagrams illustrating light received by the electronic device of the embodiment from a collision warning system. 11 is a graph showing an example of a change over time in the level of light received by a light receiving section. FIG. 2 is a diagram illustrating an example of an electrical configuration of a light receiving unit according to the present embodiment. FIG. 4 is a diagram illustrating a method for setting a threshold value according to the present embodiment. FIG. 13 is a diagram showing an example of a modified electrical configuration of a light receiving section. 1 is a diagram showing a configuration of an electronic device according to an embodiment of the present invention, as viewed from diagonally above and to the right on the rear side. 1A to 1C are six-sided views illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. 1A to 1C are six-sided views illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. FIG. 2 is a diagram showing the internal configuration of the electronic device of the present embodiment. FIG. 2 is a diagram showing the internal configuration of the electronic device of the present embodiment. FIG. 2 is a diagram showing the internal configuration of the electronic device of the present embodiment. 1 is a diagram showing an external configuration of an electronic device according to an embodiment of the present invention; 1A to 1C are six-sided views illustrating an example of an external configuration of an electronic device according to an embodiment of the present invention. 1 is a diagram illustrating a state in which a second housing is removed from the electronic device of the present embodiment. FIG. 13 is a diagram showing a state in which a condenser lens is further removed from the electronic device of the embodiment. FIG. 2 is a diagram illustrating a state in which a first housing is removed from the electronic device of the present embodiment. 1 is a diagram showing an electronic device according to an embodiment of the present invention attached to a dashboard using a first attachment member; 3A to 3C are diagrams illustrating the external configuration of a first mounting member according to the present embodiment. 1A to 1C are diagrams illustrating a method of attaching an electronic device using the first attachment member of the present embodiment. 11 is a diagram showing the electronic device of the present embodiment attached in a suspended state using a second attachment member. FIG. 4A to 4C are diagrams showing the external configuration of a second mounting member according to the present embodiment. 4A to 4C are diagrams showing the external configuration of a second mounting member according to the present embodiment. 4A to 4C are diagrams showing the external configuration of a second mounting member according to the present embodiment. 11A to 11C are diagrams illustrating a method of attaching an electronic device using the second attachment member of the present embodiment. 1 is a diagram showing a state in which the electronic device of the present embodiment is attached in a suspended manner using an attachment member. 1 is a diagram showing a state in which the electronic device of the present embodiment is attached in a suspended manner using an attachment member. 1 is a diagram showing a state in which the electronic device of the present embodiment is attached in a suspended manner using an attachment member. 1A and 1B are diagrams illustrating an external configuration of a mounting member according to the present embodiment. 1A and 1B are diagrams illustrating an external configuration of a mounting member according to the present embodiment. 1 is a diagram showing a state in which an electronic device is attached to a windshield using the attachment member of the present embodiment, as viewed from the side. 1A and 1B are diagrams illustrating an external configuration of a mounting member according to the present embodiment. 1A to 1C are six views showing the external configuration of a second mounting member of the present embodiment. 1A to 1C are six views showing the external configuration of a mounting member according to an embodiment of the present invention. 4A to 4C are diagrams illustrating the operation of the electronic device of the present embodiment. 4A to 4C are diagrams illustrating the operation of the electronic device of the present embodiment. 13A and 13B are diagrams illustrating an example of characteristics of a first wavelength selecting section and a second wavelength selecting section according to a modified example. 13 is a diagram showing a configuration of a light receiving section according to a modified example. FIG. FIG. 13 is a diagram illustrating a control performed by a control unit according to a modified example.

The embodiments will be described in detail below with reference to the drawings. The embodiments shown below are examples of the embodiments of the present disclosure, and the present disclosure is not limited to these embodiments. In the drawings referred to in the present embodiment, the same parts or parts having similar functions are given the same or similar symbols (symbols consisting of only A, B, etc. added after a number), and repeated explanations may be omitted. In addition, in each figure referred to in the following explanation, the scale may be different from the actual scale so that each component, each area, etc. is of a recognizable size. Below, a case will be described in which the system of the present disclosure is applied to a system mounted on a vehicle and detects a speed measuring device that emits light of a specific wavelength.

[1. First embodiment]
<1-1. Configuration of the first embodiment>
FIG. 1 is a diagram showing the configuration of a system according to the first embodiment. The electronic device 10 is an electronic device to which the system according to the present disclosure is applied. The electronic device 10 is a detector compatible with an optical method and a radar method. The electronic device 10 detects a speed measurement device 30. The optical method is a method of detecting light emitted by the speed measurement device 30. In this embodiment, the light emitted by the speed measurement device 30 is a pulsed light. More specifically, the light emitted by the speed measurement device 30 is a pulsed laser having a certain pulse width. In this case, the optical method can also be called a laser method. The radar method is a method of receiving a predetermined radio wave emitted by a speed measurement device (not shown), which is a radio wave generating device. In this embodiment, the predetermined radio wave is a microwave.

The electronic device 10 is a monitor-type device having a substantially rectangular parallelepiped shape. The electronic device 10 is installed in the passenger compartment of the vehicle 40. The electronic device 10 is installed on the dashboard 41 using, for example, double-sided tape. The housing of the electronic device 10 is the housing 100. An opening is provided on the front of the housing 100. The electronic device 10 has a display unit 13 for displaying an image at the position of this opening. The housing 100 is formed of resin or other materials.

The speed measurement device 30 is installed at a vehicle speed control point. The speed measurement device 30 may be, for example, either fixed or mobile, but is preferably mobile. Mobile includes, for example, portable and vehicle-mounted types. In the case of a mobile type, the electronic device 10 can detect the speed measurement device 30 by an optical method even if the location information of the speed control point is not known. In the example of FIG. 1, the speed measurement device 30 is installed on a sidewalk adjacent to a roadway and measures the speed of vehicles traveling on this roadway. The speed measurement device 30 measures the distance to vehicles within a predetermined distance (for example, 70 m), and further measures the speed of vehicles at a point that is a predetermined distance closer to the device (for example, 20 m).

The speed measurement device 30 includes a speed measurement unit 31, an imaging unit 32, and a strobe 33. The speed measurement unit 31 measures the speed of the vehicle by a laser scanning method. Specifically, when the pulsed light Lout reaches the vehicle 40 and is reflected, the speed measurement unit 31 receives the reflected light Lref. The speed measurement unit 31 measures the distance to the vehicle 40 based on the time it takes from emitting the pulsed light Lout to receiving the reflected light Lref. The speed measurement unit 31 repeatedly measures the distance to the vehicle 40, and measures the speed of the vehicle 40 based on the distance traveled by the vehicle 40 per unit time.

The speed measurement unit 31 emits pulsed light Lout while changing the direction within a sector-shaped range T with a central angle of angle θ. θ is, for example, 110 degrees. The range T includes a wider range upstream of the position where the speed measurement device 30 is installed in the traveling direction of the vehicle 40 than the range downstream. The speed measurement unit 31 changes the emission direction of the pulsed light Lout in the counterclockwise direction. For example, the speed measurement unit 31 emits pulsed light Lout in the direction of arrow D1, and then emits pulsed light Lout in the direction of arrow D2. The emission direction of the pulsed light Lout is, for example, approximately horizontal. For example, the speed measurement unit 31 emits pulsed light to a mirror rotating at a constant speed. The pulsed light reflected by the mirror and emitted from the light-emitting window is the pulsed light Lout.

The pulsed light Lout has energy concentrated at a specific wavelength. The specific wavelength may be a wavelength at which the energy of the light emitted by the light emitting device is at its peak. The pulsed light Lout desirably has energy at a specific wavelength outside the visible light range, for example. The specific wavelength may be a wavelength that is not perceptible to humans, for example, the pulsed light Lout may have energy at a specific wavelength outside the visible light range. The specific wavelength may be, for example, 905 nm, which belongs to the infrared light range. However, the specific wavelength is not limited to this, and may be 850 nm, 950 nm, 1900 nm, or other wavelengths.

2 is a diagram showing an example of the waveform of the pulsed light Lout emitted from the speed measuring device 30. Here, the pulsed light Lout is a rectangular wave. However, the pulsed light Lout may be a sine wave, a triangular wave, a sawtooth wave, or other waveforms. The pulsed light Lout is light in which periods T1 and T2 alternate. Period T1 is a period during which pulsed light of a specific wavelength λout is emitted. In period T1, the pulsed light Lout alternates between a high level (H) and a low level (L). Period T2 is a period during which light of this pulse waveform is not emitted. As described above, the speed measuring device 30 emits pulsed light to a mirror rotating at a constant speed, and emits pulsed light Lout reflected by this mirror. Therefore, the period during which the pulsed light from the mirror is not directed toward the light emitting window of the speed measuring device 30 is period T2.

The imaging unit 32 captures an image of the target vehicle when the speed measured by the speed measurement unit 31 is equal to or greater than a threshold value. The imaging unit 32 is used to capture an image of a vehicle that has violated the speed limit. The strobe 33 emits light when an image is captured by the imaging unit 32. The imaging unit 32 may capture images based on light in the infrared region so that images can be captured even at night. In this case, the strobe 33 may emit light that has energy in the infrared region. The speed measurement device 30 transmits data such as the measured speed and the captured image to an external computer.

Figure 3 is a rear view of the electronic device 10. As shown in Figure 3, a first window 101 and a second window 102 are formed on the rear surface of the housing 100. The first window 101 and the second window 102 are openings for guiding external light into the inside of the housing 100. The first window 101 and the second window 102 are arranged with a predetermined distance between them in the left-right direction. The first window 101 and the second window 102 are, for example, rectangular, but may be of other shapes. A light receiving unit 12 is provided inside the housing 100. The light receiving unit 12 receives light incident through the first window 101 and the second window 102.

Figures 4 and 5 are cross-sectional views of the electronic device 10. Figure 4(a) is a cross-sectional view (cross-sectional view I-I in Figure 3) of the electronic device 10 cut in the vertical direction at a position including the first window 101. Figure 4(b) is a cross-sectional view (cross-sectional view II-II in Figure 3) of the electronic device 10 cut in the vertical direction at a position including the second window 102. Figure 5 is a cross-sectional view (cross-sectional view III-III in Figure 3) of the electronic device 10 cut in the horizontal direction at a position including the first window 101 and the second window 102. Figure 6 is a graph showing an example of the general characteristics of a wavelength selection unit (described later) of the light receiving unit 12. In Figure 6, the horizontal axis corresponds to wavelength, and the vertical axis corresponds to transmittance.

As shown in Figs. 4(a) and (b), the first window 101 is provided with a visible light cut filter 126. The second window 102 is provided with a visible light cut filter 127. The visible light cut filters 126 and 127 block at least a portion of visible light. The visible light cut filters 126 and 127 transmit light of a specific wavelength λout. Blocking visible light is preferably at least equivalent to attenuating the visible light. The visible light region is, for example, 400 to 700 nm. The presence of the visible light cut filters 126 and 127 makes it difficult for the components housed inside the housing 100 to be visually recognized from the outside. In addition, the presence of the visible light cut filters 126 and 127 can reduce the adverse effects of the light receiving unit 12 receiving strong visible light such as direct sunlight.

As shown in FIG. 4A, the first wavelength selection unit 121 and the first light receiving element 122 are provided facing the first window 101. The first wavelength selection unit 121 selects and transmits light of a specific wavelength λout from the incident light. Selecting a wavelength may mean selecting some wavelengths from a certain wavelength range and not selecting at least some other wavelengths. The first wavelength selection unit 121 is a band pass filter here. As shown by the solid line in FIG. 6, it transmits light of wavelengths in a wavelength range including the specific wavelength λout, here the wavelength range from wavelength λ1a to wavelength λ1b, and blocks light of other wavelength ranges. Blocking light means at least attenuating that light, and the amount of attenuation of the wavelength that blocks light is greater than the amount of attenuation of the wavelength that transmits light. The characteristics of the first wavelength selection unit 121 are determined from the viewpoint of transmitting only light of the same wavelength as the pulse light from the speed measurement device 30 as much as possible. The width of the wavelength region from wavelength λ1a to wavelength λ1b is, for example, 20 nm, but it is more desirable for it to be narrower than this.

In FIG. 6, the transmittance of the frequency region through which light passes is shown as 100%, and the frequency region through which light is blocked is shown as nearly 0%, but it is sufficient if the transmittance is tolerable for practical use. It is desirable for the wavelength selection section to exhibit a steep characteristic as exemplified in FIG. 6, but it may also exhibit a broader characteristic. For example, there may be wavelengths for which the transmittance of both the first wavelength selection section 121 and the second wavelength selection section 123 is not 0%.

The first light receiving element 122 receives the light transmitted by the first wavelength selection unit 121 and outputs a first signal according to the first amount of received light, which is the amount of received light. The first light receiving element 122 is preferably a photodiode, for example, but may be a phototransistor or other light receiving element. The first light receiving element 122 has sensitivity at least in the infrared light region. The first light receiving element 122 includes, for example, a resin mold that transmits infrared light. It is preferable that the first light receiving element 122 does not receive light in the wavelength region of 700 nm or less. The first light receiving element 122 is a so-called lensless type light receiving element that does not have a lens. This increases the light receiving angle of the first light receiving element 122 (for example, 120 to 180 degrees), making it possible to receive light from multiple directions. Alternatively, the light receiving angle of the first light receiving element 122 may be widened by combining a lens or a mirror.

As shown in FIG. 4B, the second wavelength selection unit 123 and the second light receiving element 124 are provided facing the second window 102. The second wavelength selection unit 123 is a filter that selects and transmits light in a wavelength range different from the specific wavelength λout from the incident light. The wavelength different from the specific wavelength may be a wavelength different from the wavelength at which the energy of the light emitted by the light emitting device is at its peak. The wavelength different from the specific wavelength may be a wavelength included in the visible light range. The second wavelength selection unit 123 is, for example, a band elimination filter. As shown by the dashed line in FIG. 6, the second wavelength selection unit 123 blocks light in a wavelength range including the specific wavelength λout, here, the wavelength range from wavelength λ2a to wavelength λ2b, and transmits light in other wavelength ranges. It is desirable that the wavelength range from wavelength λ2a to wavelength λ2b does not include the specific wavelength λout, and preferably includes a wide wavelength range other than the specific wavelength λout. The characteristics of the second wavelength selection section 123 are determined from the viewpoint of transmitting only light with a wavelength different as much as possible from the pulsed light Lout from the speed measurement device 30.

The second light receiving element 124 receives the light that has passed through the second wavelength selection unit 123 and outputs a second signal corresponding to the second amount of received light, which is the amount of received light. The second light receiving element 124 is, for example, a photodiode, but may be a phototransistor or other light receiving element. It is preferable that the second light receiving element 124 is a light receiving element with the same characteristics as the first light receiving element 122, for example, the same product (for example, model number). This is because when the second light receiving element 124 and the first light receiving element 122 receive the same light, the first signal Sig1 and the second signal Sig2 become the same signal. The second light receiving element 124, like the first light receiving element 122, is a so-called lensless type sensor that does not have a lens.

As shown in FIG. 5, the housing 100 includes a partition 103 between the first light receiving element 122 and the second light receiving element 124 to block light. It is desirable that the distance between the first light receiving element 122 and the second light receiving element 124 is as small as possible. This is to prevent a difference in the timing of light incidence between the first light receiving element 122 and the second light receiving element 124. Even in this case, the presence of the partition 103 reduces the possibility that light transmitted through the first wavelength selection unit 121 is received by the second light receiving element 124 and that light transmitted through the second wavelength selection unit 123 is received by the first light receiving element 122.

The light receiving unit 12 is preferably shielded using a conductive material. This shield is made of, for example, a metal case. This reduces the effects of electromagnetic noise on the electronic components inside the housing 100.

The first window 101, the second window 102, and the light receiving unit 12 may be arranged to face diagonally forward (e.g., forward left) with respect to the traveling direction of the vehicle 40 when the display unit 13 of the electronic device 10 is facing the driver's seat of the vehicle 40. This may make it easier for the light receiving unit 12 to receive the pulsed light Lout from the speed measurement device 30.

Figure 7 is a block diagram showing the electrical configuration of electronic device 10. Control unit 11 controls each unit of electronic device 10. Control unit 11 is, for example, a computer including an arithmetic processing circuit and a memory. The arithmetic processing circuit includes, for example, a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or other arithmetic processing circuit. The memory includes, for example, a RAM (Random Access Memory) or other volatile memory. The arithmetic processing circuit performs various controls by temporarily reading data into the memory and performing arithmetic processing.

The light receiving unit 12 includes a first wavelength selection unit 121, a first light receiving element 122, a second wavelength selection unit 123, a second light receiving element 124, and an interface 125. The first wavelength selection unit 121, for example, selects a wavelength region from wavelength λ1a to wavelength λ1b from the incident light and transmits it as light Lin1. The first light receiving element 122 receives the light Lin1 and outputs a first signal Sig1 corresponding to the first amount of received light. The first amount of received light may indicate the amount of light of a specific wavelength selected and received by the light receiving unit 12. The first signal Sig1 indicates the amount of received light of the light Lin1. The second wavelength selection unit 123 selects a wavelength region different from the wavelength region from wavelength λ2a to wavelength λ2b and transmits it as light Lin2. The second light receiving element 124 receives the light Lin2 and outputs a second signal Sig2 corresponding to the second amount of received light. The second amount of received light may indicate the amount of light of a wavelength different from the specific wavelength selected and received by the light receiving unit 12. The second signal Sig2 indicates the amount of received light Lin2. The interface 125 processes the first signal Sig1 and the second signal Sig2, and outputs the processed signals to the control unit 11. The interface 125, for example, converts the first signal Sig1 and the second signal Sig2 into a digital format and outputs them.

The display unit 13 displays an image. The display unit 13 is, for example, a 3.2-inch color TFT liquid crystal display. However, the display unit 13 may be an organic EL display or other display device. The speaker 14 outputs sound. The microwave receiver 15 includes an antenna and a receiving circuit, and receives microwaves. The GPS (Global Positioning System) receiver 16 includes an antenna and a receiving circuit, and receives signals from GPS satellites. The GPS receiver 16 processes the received signal and outputs position information. The position information includes, for example, latitude information and longitude information, and may also include altitude information. The communication unit 17 communicates with an external device. The communication unit 17 performs wireless communication, for example, via Wi-Fi (registered trademark), Bluetooth (registered trademark), or other methods.

The memory unit 18 stores data. The memory unit 18 stores, for example, programs that allow the control unit 11 to perform various controls. The control unit 11 reads the programs from the memory unit 18 into memory and executes them. The memory unit 18 also stores map data showing maps, data showing the types and locations of various facilities, data for notifying the presence of objects to be notified, data for implementing a route guidance function, and the like. Examples of objects to be notified include locations of accidents caused by drowsy driving, speed measuring devices (radar type, loop coil type, H system, LH system, photoelectric cell type, mobile type, etc.), speed limit change points, enforcement areas, checkpoints, parking monitoring areas, N systems, traffic monitoring systems, intersection monitoring points, signal ignoring prevention systems, police stations, areas where accidents frequently occur, areas where vehicle thefts frequently occur, sharp/continuous curves (expressways), branching/merging points (expressways), ETC lane advance guidance (expressways), service areas (expressways), parking areas (expressways), highway oases (expressways), smart interchanges (expressways), PA/SA gas stations (expressways), tunnels (expressways), highway radio receiving areas (expressways), prefectural border announcements, roadside stations, and viewpoint parking. The memory unit 18 stores information on the type of object to be notified, location information indicating its location, data on an image (e.g., a schematic diagram or photograph) to be displayed on the display unit 13, and audio data in association with each other.

The storage unit 18 may include a storage medium that permanently stores data. The storage unit 18 may include, for example, an optical recording medium, a magnetic recording medium, a semiconductor recording medium, or other recording media.

The operation unit 19 accepts operations by the user. The operation unit 19 includes, for example, a touch sensor, a volume adjustment button, and a task button. The touch sensor is provided on the surface of the display unit 13 and detects the position touched by the user. The volume operation button is operated to adjust the volume of the sound output from the speaker 14. The task button is a button for performing various tasks.

The sensor unit 20 includes various sensors. For example, the sensor unit 20 is equipped with a geomagnetic sensor, an acceleration sensor, and an illuminance sensor. The geomagnetic sensor is a sensor that detects geomagnetism to detect which direction north is in relative to the direction of travel. The acceleration sensor is a sensor that detects the acceleration of the vehicle in the forward/backward, left/right, and up/down directions. The illuminance sensor is a sensor that detects the illuminance, which indicates the brightness inside the vehicle cabin.

The mounting unit 21 is a mounting unit into which an external storage medium is mounted. The external storage medium is, for example, a memory card. In this case, the mounting unit 21 is a memory card slot. Data stored in the memory unit 18 may be imported via the external storage medium. This data includes update information on new notification targets (location information such as longitude and latitude, type information, etc.).

The power supply unit 22 supplies power from a power source to each component within the electronic device 10. The power supply unit 22 includes, for example, a power switch and a DC jack. The DC jack is for connecting a cigarette plug cord, and is connected to a cigarette lighter socket of a vehicle via the cigarette plug cord to receive power. The power switch is a switch for turning the power of the electronic device 10 on and off.

The light-emitting unit 23 emits light in various colors. The light-emitting unit 23 includes, for example, a light-emitting diode.

The cable terminal section 24 is a terminal to which an external connection cable is connected. For example, the connection cable is a cable that connects the electronic device 10 to an OBD-II connector mounted on a vehicle. The OBD-II connector is also called a fault diagnosis connector, and is connected to the vehicle's ECU (Engine Control Unit) to output various vehicle information.

In addition to the above, the electronic device 10 may also have functions that are common to radar detectors.

<1-2. Operation of the First Embodiment>
Next, the operation of this embodiment will be described.
<1-2-1. Optical Notification>
Fig. 8 is a flowchart showing the operation of the control unit 11 of the electronic device 10. Fig. 8 shows the operation when detecting the speed measuring device 30 by an optical method. When the electronic device 10 starts operating, the control unit 11 executes the process described below. There is no particular limit to the trigger for starting the operation of the electronic device 10, but it is preferable that the trigger be, for example, the power being turned on for the electronic device 10 or the start of execution of a route guidance function.

The control unit 11 first starts displaying a map screen on the display unit 13 (step S1). The map screen is a screen showing the vehicle's position on a map. The map displayed on the display unit 13 is identified based on map data and position information from the GPS receiver unit 16. The vehicle's position is identified based on position information from the GPS receiver unit 16. FIG. 9 is a diagram showing an example of a map screen. In the map screen shown in FIG. 9, an icon I1 showing the vehicle's position is arranged on a map M. The map screen shows the address of the current position, the distance to a specified object to be notified (here, "1960 m to H system"), the speed limit, and a photo of the area around the speed control point. FIG. 10 is a diagram showing another example of a map screen. In the map screen shown in FIG. 10, an icon I1 showing the vehicle's position is also arranged on a map M. Below, an example of control when the map screen shown in FIG. 10 is displayed will be described. The icon may be replaced with a character, a symbol, a figure, or another object.

Next, the control unit 11 acquires the first signal Sig1 and the second signal Sig2 from the light receiving unit 12 (step S2). Next, the control unit 11 calculates the difference between the first amount of received light corresponding to the first signal Sig1 and the second amount of received light corresponding to the second signal Sig2 (step S3). Next, the control unit 11 determines whether the calculated difference is equal to or greater than a threshold (step S4). If the difference is less than the threshold, the control unit 11 determines "NO" in step S4 and returns to the processing of step S2. In this case, the control unit 11 determines that the speed measurement device 30 has not been detected and does not notify the presence of the speed measurement device 30.

On the other hand, if the calculated difference is equal to or greater than the threshold value, the control unit 11 determines "YES" in step S4 and performs notification control (step S5). Notification control is control that notifies the user of the presence of the speed measurement device 30. Notification control can be said to be control that issues an alarm to make the user aware of what the speed measurement device is doing. Notification control here is control that notifies the user of the presence of the speed measurement device 30 using a first method. Notification control includes, for example, control to display a notification screen on the display unit 13.

11 is a diagram showing an example of a notification screen. The notification screen shown in FIG. 11 is a screen in which a window W1 is arranged on top of the map screen described above. In the window W1, an icon M1 indicating the presence of the speed measurement device 30 and a message indicating the presence of the speed measurement device 30, such as "Approaching a speed control point. Please be careful," are arranged. The icon M1 is an icon that allows the user to recognize that the speed measurement device 30 is compatible with the optical method. The notification control may include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output a sound from the speaker 14 saying, "Approaching a laser speed control point. Please be careful." The notification control may include other controls, such as control to cause the light-emitting unit 23 to emit light. The notification control may be control that notifies the user of the presence of the speed measurement device 30 in a manner that allows the user to recognize it.

Next, the control unit 11 judges whether to end the process of FIG. 8 (step S6). The trigger for ending the process is not particularly limited, but may be, for example, the power supply of the electronic device 10 being turned off by the operation of the operation unit 19, or the route guidance function being stopped. If the result of the judgment in step S6 is "NO", the control unit 11 returns to the process of step S2 and repeats the above process (step S4). For example, if the difference changes from a threshold value or more to a value less than the threshold value, the control unit 11 judges "NO" in step S4 and stops the notification control. In this case, the control unit 11 causes the display unit 13 to display the map screen shown in FIG. 12. This is because it means that a speed control point has been passed. If the result of the judgment in step S6 is "YES", the control unit 11 ends the process of FIG. 8 (step S7).

Here, the reason why the speed measuring device 30 can be detected by the above-mentioned method will be explained. As explained in FIG. 6, the first wavelength selection unit 121 selects and transmits light of a specific wavelength λout (more specifically, a wavelength region from wavelength λ1a to wavelength λ1b) in which the pulsed light Lout has energy. Therefore, the first signal Sig1 should show a large amount of received light during the period in which the pulsed light Lout is received, and a small amount of received light during other periods. However, the light receiving unit 12 may receive not only the pulsed light Lout that is the object of reception, but also disturbance light. This disturbance light may be mistaken for pulsed light. An example of disturbance light is light that arrives when sunlight is periodically blocked by the branches and leaves of a tree swayed by the wind. Another example of disturbance light is light from traffic lights and advertisements that periodically turn on and off, and light from a rotating warning light that rotates at a constant speed. The light received by the light receiving unit also changes due to vibration of the light receiving unit. For example, if the vehicle 40 travels on a pier or other place that generates periodic vibrations, the orientation of the light receiving unit 12 (e.g., the first light receiving element 122) may change, causing the light receiving unit 12 to receive sunlight or other light that turns on and off repeatedly at a predetermined cycle. Even in such a case, the first signal Sig1 indicates a relatively large amount of received light.

In contrast, the second wavelength selection unit 123 blocks light of a specific wavelength λout (in this embodiment, the wavelength range from wavelength λ2a to wavelength λ2b) where the pulsed light Lout has energy, and transmits light of other wavelength ranges. Therefore, the amount of light received by the second signal Sig2 is small during the period in which the pulsed light Lout is received. The second light receiving element 124 receives the above-mentioned disturbance light, but such disturbance light generally has a wide wavelength range in which energy is distributed. Therefore, even if the light receiving unit 12 receives disturbance light that is periodically turned on and off, it is considered that the amount of light received by the second light receiving element 124 is large. Therefore, when the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is small, that is, when the difference in the amount of light received is equal to or greater than the threshold, it can be estimated that the pulsed light Lout has been received. On the other hand, when the amount of light received by the first signal Sig1 is large and the amount of light received by the second signal Sig2 is also large, that is, when the difference in the amount of light received is less than the threshold, it can be estimated that the pulsed light Lout is unlikely to have been received. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, it is expected that the detection accuracy of the speed measurement device 30 will be improved.

<1-2-2. Radar Notification>
The control unit 11 may further execute the process of FIG. 13 in parallel with the process of FIG. 8 based on the microwaves received by the microwave receiving unit 15 .

First, the control unit 11 acquires a microwave reception signal from the microwave receiving unit 15 (step S11). Next, the control unit 11 performs a determination process to determine whether or not a radar-type speed measurement device is present based on the microwave reception signal (step S12). In step S12, the control unit 11 may determine whether or not a speed control point is present based on the frequency band of the received microwave. The algorithm for this determination may be, for example, the method described in Patent Document 1 or 2, and a description thereof will be omitted.

Next, the control unit 11 judges whether or not a speed measurement device has been detected based on the result of the judgment process (step S13). If the judgment in step S13 is "YES", the control unit 11 performs notification control (step S14). The notification control is a control to notify the user of the presence of a speed measurement device by the third method. The notification control includes, for example, control to display a notification screen on the display unit 13. FIG. 14 is a diagram showing an example of a notification screen. The notification screen shown in FIG. 14 is a screen in which a window W2 is superimposed on the above-mentioned map screen. In the window W2, an icon M2 indicating the presence of a speed measurement device 30 and a message indicating the presence of a speed measurement device, such as "Approaching a speed control point. Please be careful", are arranged. The icon M2 is an icon that allows the user to recognize that the speed control device is compatible with the radar method. In other words, the icon M2 is different from the icon M1. The notification control may include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output a voice from the speaker 14 saying, "You are approaching a radar speed control point. Please be careful." The notification control may be other controls, and may include, for example, control to cause the light-emitting unit 23 to emit light. Here too, the notification control may be control that notifies the user of the presence of the speed measurement device in a manner that allows the user to recognize it.

1-3. Modification of the first embodiment
The control unit 11 may further perform the following controls.
<1-3-1. Notification according to the number of pulses>
When the speed measurement device 30 emits light having a pulse waveform, referring to the number of pulses is also useful in detecting the speed measurement device 30. FIG. 15 is a diagram showing an example of the waveform of the pulse light Lout received by the electronic device 10. FIG. 15(a) shows a case where the distance between the electronic device 10 and the speed measurement device 30 is relatively large, and FIG. 15(b) shows a case where the distance between the electronic device 10 and the speed measurement device 30 is relatively small. As shown in FIG. 15(a), when the distance between the speed measurement device 30 and the electronic device 10 is relatively large, the pulse light Lout traveling in the direction of the electronic device 10 can be received, but the pulse light propagating only in a position close to the speed measurement device 30 on the road (for example, directly to the side of the speed measurement device 30) is not received. Therefore, the light receiving period Rx1 of the pulse light Lout becomes shorter relative to the non-light receiving period Rx2. As shown in Fig. 15(b), when the distance between the speed measurement device 30 and the electronic device 10 is relatively small, the pulsed light Lout traveling in the direction toward the electronic device 10 can be received, and also the pulsed light propagating only in the position on the road close to the speed measurement device 30 can be received. Therefore, the light receiving period Rx1 of the pulsed light Lout becomes relatively long compared to the light non-receiving period Rx2. Also, it is considered that the number of pulses decreases immediately after the vehicle 40 passes the position of the speed measurement device 30. Note that in practice, the relationship Rx1<<Rx2 may be satisfied.

Therefore, the control unit 11 may perform notification control according to the number of pulses. For example, the control unit 11 may change the notification level according to the number of pulses included in the light receiving period of the pulsed light. The notification level is an index of how important the content of the notification is to the user, and in this embodiment, it may be referred to as an alarm level. The control unit 11 specifies the number of pulses based on at least the amount of light received by the first light receiving element 122. For example, the control unit 11 increases the notification level during a period in which the number of pulses is equal to or greater than a threshold value, or during a period in which the number of pulses is increasing, since the vehicle is approaching the speed measuring device 30. The control unit 11 decreases the notification level during a period in which the number of pulses is less than a threshold value, or during a period in which the number of pulse widths is decreasing, since the vehicle is far from the speed measuring device 30 or is moving away. The control unit 11 changes the notification method according to the notification level. For example, the control unit 11 may change the message displayed on the display unit 13, change the notification sound output from the speaker 14, or change the light emission color of the light emitting unit 23, depending on the notification level.

The control unit 11 may also estimate the distance from the number of pulse widths and notify the user according to that distance. For example, as shown in FIG. 16, the control unit 11 may estimate the position of the speed measuring device 30 from the number of pulse widths and display it on a map. In this example, an icon P indicates the position of the speed measuring device 30. As described above, the control unit 11 can notify the user according to the positional relationship between the light receiving unit 12 and the speed measuring device 30.

As shown in FIG. 17, when there is another vehicle ahead of the vehicle 40, the pulsed light Lout may be blocked in whole or in part by the vehicle C traveling ahead. In this case, even if the number of pulses is referred to, the positional relationship may not be accurately determined. Therefore, the control unit 11 detects the presence or absence of another vehicle C ahead of the vehicle 40 within a predetermined range from the vehicle 40. When there is no other vehicle C, the control unit 11 may perform notification control according to the number of pulses, and when there is a vehicle C, the control unit 11 may stop the notification control. Stopping the notification control according to the number of pulses may mean not changing the content of the notification control according to the number of pulses. In addition, the electronic device 10 may stop the notification control according to the number of pulses when the inter-vehicle distance is less than a threshold value, and perform this notification control when the inter-vehicle distance is equal to or greater than the threshold value. There is no particular limit to the method of detecting the vehicle C, but one method is to use an in-vehicle camera 50. The in-vehicle camera 50 is, for example, a camera used in a drive recorder, and here, captures an image ahead of the vehicle 40.

Figure 18 is a flowchart showing the operation of the control unit 11 of the electronic device 10 in this case. The control unit 11 acquires a captured image from the in-vehicle camera 50 via the communication unit 17 (step S21). Next, the control unit 11 analyzes the captured image (step S22). The algorithm for analyzing the captured image does not matter, but for example, a pattern matching method is available. Then, the control unit 11 determines whether there is a vehicle ahead (step S23). If the result of step S23 is "NO", the control unit 11 determines that notification control according to the number of pulses is to be performed (step S24). In this case, the control unit 11 performs a process such as rewriting the flag to a value indicating that control according to the number of pulses is to be performed. If the result of step S23 is "YES", the control unit 11 determines that notification control according to the number of pulses is to be stopped (step S25). In this case, the control unit 11 performs a process such as rewriting a predetermined flag to a value indicating that control according to the number of pulses is not to be performed. Here, a vehicle ahead of the vehicle 40 is detected, but it may be behind the vehicle 40. The electronic device 10 may also have a built-in vehicle-mounted camera 50. This reduces the possibility of misjudging the positional relationship between the light receiving unit 12 and the speed measuring device 30 due to the presence of another vehicle C.

<1-3-2. Control according to pulse width or pulse interval>
When the speed measuring device 30 emits pulsed light, referring to the pulse width or pulse interval is also useful in detecting the speed measuring device 30. The speed measuring device 30 emits pulsed light of a specific wavelength with a predetermined duty ratio. In addition, from the viewpoint of safety, the duty ratio of the pulsed light is set to less than a predetermined value. Therefore, the control unit 11 may determine whether the speed measuring device 30 exists based on a predetermined pulse width or pulse interval and the pulse width or pulse interval of the received light. For example, the control unit 11 determines that the speed measuring device 30 exists when it is included within a certain range from the reference pulse width or pulse interval, but determines that it does not exist otherwise. The control unit 11 specifies the pulse width or pulse interval based on at least the amount of light received by the first light receiving element 122. As described above, the control unit 11 can reduce notifications that mistakenly identify ambient light as light from a light emitting device.

<1-3-3. Control according to the intensity of pulsed light>
Referencing the intensity of the pulsed light of the received light is also useful in detecting the speed measurement device 30. The closer the vehicle 40 is to the speed measurement device 30, the greater the intensity of the pulsed light becomes, and the further away the vehicle 40 is, the smaller the distance becomes. Therefore, the control unit 11 may change the notification level according to the amount of pulsed light received by the first light receiving element 122. For example, the control unit 11 may notify by raising the notification level when the intensity of the pulsed light is increasing, and by lowering the notification level when the intensity of the pulsed light is decreasing. In addition, the control unit 11 may determine that the speed measurement device 30 does not exist when the amount of received pulsed light is less than a threshold value. As described above, the control unit 11 can notify the user according to the positional relationship between the light receiving unit 12 and the speed measurement device 30.

Disturbance light may also include light used in sensors for detecting other vehicles, such as a vehicle distance sensor. Such light may have the same frequency as the pulsed light Lout. Even in such cases, it is expected that the possibility of false alarms will be reduced by referring to the pulse interval or intensity of the light received by the electronic device 10.

<1-3-4. Notification of imaging availability>
After performing the notification control, the control unit 11 may perform control to notify the user that an image has been captured or that an image has not been captured, depending on whether a predetermined light has been detected. When an image has been captured by the image capturing unit 32, the strobe 33 emits light. Therefore, after performing the notification control, the control unit 11 may further notify the user that an image has been captured if it detects the light of the strobe 33. Alternatively, after performing the notification control, the control unit 11 may notify the user that an image has not been captured if it does not detect the light of the strobe 33. This allows the user to know whether an image of the vehicle 40 has been captured. The light from the strobe 33 may be received by the light receiving unit 12, or another light receiving unit may be used.

[2. Second embodiment]
In this embodiment, even when the electronic device 10 does not receive pulsed light and microwaves, it has a function of notifying the presence of the speed measurement device 30. The electronic device of this embodiment may have some or all of the functions of the first embodiment described above, or may not have them.

<2-1. Configuration of the second embodiment>
Fig. 19 is a diagram for explaining an outline of the system of this embodiment. As shown in Fig. 19, there are various types of roads. For example, on a road Ar1 that is also used as a school route called a green belt, it is particularly important that the vehicle 40 obeys the speed limit, and it is considered that the possibility of installing a speed measurement device 30 is higher than on a road Ar2 of another type. Therefore, the control unit 11 may notify the presence of the speed measurement device 30 when the electronic device 10 is located on a predetermined type of road.

<2-2. Operation of the Second Embodiment>
20 is a flowchart showing the operation of the control unit 11 of the electronic device 10. The control unit 11 acquires location information from the GPS receiving unit 16 (step S31). Next, the control unit 11 judges whether the current location indicated by the location information is within a predetermined area (step S32). Here, the control unit 11 judges whether the vehicle 40 is on a green belt based on the current location and the data stored in the storage unit 18. If the control unit 11 judges "YES" in step S32, it performs notification control (step S33). The notification control includes, for example, control to display a notification screen on the display unit 13.

21 is a diagram showing an example of a notification screen. The notification screen shown in FIG. 21 is a screen in which a window W3 is arranged on top of the map screen described above. In the window W3, an icon M3 indicating the presence of a speed measurement device 30 and a message indicating the presence of a speed measurement device, such as "You are in a speed control area," are arranged. The icon M3 is an icon that allows the user to recognize that a speed control point is being set based on location information. That is, for example, the icon M3 is different from the icons M1 and M2. The notification control may include control to output a notification sound from the speaker 14. In this case, the control unit 11 may output a sound from the speaker 14 saying "You are in a speed control area." The notification control may include other controls, such as control to cause the light-emitting unit 23 to emit light. The predetermined area is not limited to a green belt, and may be a one-way road or other types of roads.

In this way, the presence of the light-emitting device can be reported based on the position information, so that its presence can be reported even without receiving pulsed light from the speed measuring device 30.

[3. Third embodiment]
In this embodiment, the electronic device 10 has a plurality of light receiving units that receive pulsed light.

Figure 22 is a block diagram showing the electrical configuration of electronic device 10. In this example, electronic device 10 has three light receiving units 12A, 12B, and 12C. The configuration of each of light receiving units 12A, 12B, and 12C may be the same as light receiving unit 12, except for the characteristics of the wavelength selection unit. Note that in Figure 22, the display unit 13 to the cable terminal unit 24 described in Figure 6 are omitted from the illustration.

Figure 23 is a diagram showing the characteristics of the first wavelength selection section 121 and the second wavelength selection section 123 of the light receiving units 12A, 12B, and 12C of this embodiment. Figure 23(a) corresponds to the light receiving unit 12A, Figure 23(b) corresponds to the light receiving unit 12B, and Figure 23(c) corresponds to the light receiving unit 12C. As shown in Figures 23(a) to (c), the wavelength of the pulsed light to be received differs in each of the light receiving units 12A, 12B, and 12C. As shown by the solid line in Figure 23(a), the first wavelength selection section 121 of the light receiving unit 12A transmits light in a wavelength range including a specific wavelength λout1, here the wavelength range from wavelength λ11a to wavelength λ11b, and blocks light in a different wavelength range. As shown by the dashed line in Fig. 23(a), the second wavelength selection unit 123 blocks light in a wavelength region including the specific wavelength λout1, here the wavelength region from wavelength λ21a to wavelength λ21b, and transmits light in a different wavelength region. As shown by the solid line in Fig. 23(b), the first wavelength selection unit 121 of the light receiving unit 12B transmits light in a wavelength region including the specific wavelength λout2, here the wavelength region from wavelength λ12a to wavelength λ12b, and blocks light in a different wavelength region. As shown by the dashed line in Fig. 23(b), the second wavelength selection unit 123 blocks light in a wavelength region including the specific wavelength λout2, here the wavelength region from wavelength λ22a to wavelength λ22b, and transmits light in a different wavelength region. As shown by the solid line in FIG. 23(c), the first wavelength selection unit 121 of the light receiving unit 12C transmits light in a wavelength range including the specific wavelength λout3, here the wavelength range from λ13a to λ13b, and blocks light in other wavelength ranges. As shown by the dashed line in FIG. 23(c), the second wavelength selection unit 123 blocks light in a wavelength range including the specific wavelength λout3, here the wavelength range from λ23a to λ23b, and transmits light in other wavelength ranges. λout1, out2, and out3 are, for example, 850 nm, 905 nm, and 950 nm, but are not limited to these and may be 1900 nm, etc.

When the control unit 11 detects the speed measurement device 30 based on the first signal Sig1 and the second signal Sig2 from any of the light receiving units 12A, 12B, and 12C, it notifies the presence of the speed measurement device 30. According to this embodiment, even if there are multiple speed measurement devices 30 with different wavelengths of light emitted by the electronic device 10, or if the wavelength of light emitted by the speed measurement device 30 has been changed, it is possible to notify the presence of the speed measurement device 30.

The characteristics of the multiple light receiving units 12 may be the same. In this case, as shown in FIG. 24, the light receiving units 12A, 12B, and 12C may be provided at different positions on the vehicle 40. Here, the light receiving unit 12A is provided at the left front portion, the light receiving unit 12B at the center front portion, and the light receiving unit 12C at the right front portion. This makes it possible to estimate the direction from which the laser arrives based on the timing of the laser reception at the light receiving units 12A, 12B, and 12C. For example, if the laser arrives from the left front, the timing of the laser reception at the light receiving unit 12A will be relatively early, and if the laser arrives from the right front, the timing of the laser reception at the light receiving unit 12C will be relatively early. Furthermore, the control unit 11 may notify the user of the direction from which the pulsed light arrives.

The speed measurement unit 31 also emits pulsed light to a mirror rotating at a constant speed, and emits pulsed light Lout reflected by this mirror. Therefore, the timing at which the pulsed light Lout is received by each of the light receiving units 12A, 12B, 12C varies depending on, for example, the rotation speed of the mirror, the positions of the light receiving units 12A, 12B, 12C, and the distance between the light receiving units 12A, 12B, 12C and the speed measurement device 30. Therefore, the control unit 11 may detect the speed measurement device 30 based on the timing at which the pulsed light Lout is received by the light receiving units 12A, 12B, 12C.

The light receiving units 12A, 12B, and 12C may each receive light in a different direction. For example, the orientation of the light receiving elements may differ by 20 degrees between the light receiving units 12A, 12B, and 12C. This may reduce the decrease in detection accuracy due to the installation position of the speed measurement device 30. In this embodiment, it is preferable to have two or four or more light receiving units.

[4. Configuration of the light receiving unit 12]
Next, a configuration example of the light receiving unit 12 applicable to each of the above-mentioned embodiments will be described.
FIG. 25 is a diagram showing an example of the circuit configuration of the light receiving unit 12. The first light receiving element 122 is a photodiode PD1 in this embodiment. Light passing through the first wavelength selection unit 121 is incident on the light receiving surface of the photodiode PD1. The cathode of PD1 is connected to a high-potential power supply line, and the anode is connected to one end of the resistor R1. The other end of the resistor R1 is grounded. The input end of the output control circuit A1 is commonly connected to the anode of the photodiode PD1 and one end of the resistor R1. The output end of the output control circuit A1 is connected to the negative input terminal of the differential amplifier AMP. The output control circuit A1 is, for example, an amplifier that adjusts the level of a signal. The second light receiving element 124 is a photodiode PD2 in this embodiment. Light passing through the second wavelength selection unit 123 is incident on the light receiving surface of the photodiode PD2. The cathode of the photodiode PD2 is connected to a high-potential power supply line, and the anode is connected to one end of the resistor R2. The other end of the resistor R2 is grounded. The input terminal of the output control circuit A2 is commonly connected to the anode of the photodiode PD2 and one terminal of the resistor R2. The output terminal of the output control circuit A2 is connected to the positive input terminal of the differential amplifier AMP. The output control circuit A2 is, for example, an amplifier that adjusts the level of a signal. A signal corresponding to the difference between the amounts of light received by the photodiodes PD1 and PD2 is output from the output terminal of the differential amplifier AMP. The control unit 11 detects the speed measuring device 30 based on this difference. It is preferable that the control unit 11 detects the speed measuring device 30 based on the signal after it has been amplified by the differential amplifier AMP.

5. External Configuration of Electronic Device 10
FIG. 26 is a six-sided view showing an example of the external configuration of the electronic device 10. In this example, the display unit 13, the light emitting unit 23, and the illuminance sensor 201 of the sensor unit 20 are provided on the front of the housing of the electronic device 10. A speaker 14 is provided to output sound from the upper end surface of the housing 100. A mounting unit 21 (i.e., an SD card slot) for mounting an SD card (registered trademark) is provided on the right end surface of the housing 100. A light receiving unit 12 is provided on the upper right part of the back surface of the housing 100. In addition, a power switch 221 and a DC jack 222 of the power supply unit 22 are provided on the lower left part of the back surface of the housing 100. An area 104 is an area in which the model name and serial number are written.

6. Other embodiments of notification control performed by electronic device 10
Next, a description will be given of another embodiment of the information notification control performed by the electronic device 10. In the notification control described below, the notification controls described above may be appropriately combined.
<6-1. Notification regarding pulsed light Lout (fixed)>
The control unit 11 performs a first notification control to notify the presence of the fixed speed measurement device 30. FIG. 27 is a diagram showing an example of a notification screen displayed when the electronic device 10 receives the pulsed light Lout from the fixed speed measurement device 30. As shown in FIG. 27, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA2, TB1, and TB2 are arranged on a map M11. The information display areas TA1 and TA2 are displayed when the pulsed light Lout is received. The information display area TA1 is arranged in the lower right part of the display screen. The information display area TA1 displays the attributes of the speed measurement device 30 and the state of the vehicle 40. The information display area TA1 displays, as attributes of the speed measurement device 30, a character string TA11 that means that the speed measurement device 30 corresponds to an optical method, and an icon TA12 that imitates the speed measurement device 30. The information display area TA1 further displays, as the status of the vehicle 40, a character string TA13 (here, 60 km/h) indicating the current speed of the vehicle 40. In this manner, the electronic device 10 can allow the user to recognize at least one of the information regarding the attribute of the speed measurement device 30 and the status of the vehicle 40. The attribute of the speed measurement device may be other attributes such as an estimated distance from the vehicle 40. If the notification level can be specified, the information display area TA1 may display the notification level. The status of the vehicle 40 may indicate other running conditions such as engine speed in addition to the speed.

The information display area TA2 is located in the lower left of the display screen. The information display area TA2 displays an animation image including an image that mimics the speed measuring device 30. An animation image is an image that gives the viewer the impression that the image is moving by displaying multiple still images (frames) while switching between them continuously at a specified time interval. In this way, the electronic device 10 can make the user easily recognize the presence of the speed measuring device 30 that the vehicle 40 is approaching. The information display area TB1 is located in the upper right of the display screen and displays the address of the current location. The information display area TB2 is located in the upper left of the display screen and displays the current time. In addition to the notification by display, the control unit 11 may also provide a notification by a specified sound.

28 and 29 are diagrams showing an example of an animation image displayed in the information display area TA2. In FIG. 28 and FIG. 29, the images of each frame are displayed in the order indicated by the arrows. When the image of the rightmost frame in the bottom row of FIG. 28 is displayed, the image of the leftmost frame in the top row of FIG. 29 is displayed next. When the image of the rightmost frame in the bottom row of FIG. 29 is displayed, the image returns to the image of the leftmost frame in the top row of FIG. 28. As shown in FIG. 28, the animation image includes an image TA21 showing the side of the road, an image TA22 imitating a speed measuring device, and an image TA23 visually showing the area irradiated with pulsed light emitted from the speed measuring device. As shown in FIG. 28 and FIG. 29, in the animation image, an image (see the frame surrounded by a dashed line) showing the speed measuring device approaching over time and, after approaching the closest, viewed from a position far away from the speed measuring device is displayed. Then, in the animation image, the speed measuring device is again approached over time. During the period in which the pulsed light Lout is being received, the control unit 11 displays an animation in which the images of each frame are displayed in the above-mentioned order. When the control unit 11 no longer detects the presence of the optical speed measurement device 30, it stops the notification immediately or after a predetermined time. This predetermined time may be, for example, three seconds. The first frame in the animation image may be an image showing the speed measurement device as seen from the position farthest away from the speed measurement device (see the frame surrounded by the dashed line).

<6-2. Notification regarding pulsed light Lout (mobile)>
The control unit 11 performs a second notification control to notify the presence of the mobile speed measurement device 30. The second notification control is a notification control different from the first notification control. FIG. 30 is a diagram showing an example of a notification screen displayed when the electronic device 10 receives the pulsed light Lout from the mobile speed measurement device 30. As shown in FIG. 30, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40 and information display areas TA1, TA3, TB1, and TB2 are arranged on a map M11 in a superimposed manner. The information display areas TA1, TB1, and TB2 are the same as the information display areas TA1, TB1, and TB2 described in FIG. 27. The information display area TA3 is displayed when the pulsed light Lout is received. The information display area TA3 is arranged in the lower left part of the display screen. The information display area TA1 displays the attributes of the speed measurement device 30 and the state of the vehicle 40. The information display area TA3 displays an animation image including an image imitating the speed measurement device 30. The control unit 11 may notify the user by a predetermined sound in addition to the display. Furthermore, an icon indicating the position of the speed measurement device 30 may be placed on the map M11.

31 and 32 are diagrams showing an example of an animation image displayed in the information display area TA3. In FIG. 31 and FIG. 32, the images of each frame are displayed in the order shown by the arrows. When the image of the rightmost frame in the bottom row of FIG. 31 is displayed, the image of the leftmost frame in the top row of FIG. 32 is displayed next. When the image of the rightmost frame in the bottom row of FIG. 31 is displayed, the image returns to the image of the leftmost frame in the top row of FIG. 32. As shown in FIG. 31, the animation image is an image in which the image area is divided into left and right using diagonal lines, and in the left area, an image TA31 showing the surroundings of the road, an image TA32 simulating a speed measuring device, and a target image TA33 surrounding the image TA32 as a target are arranged, and in the right area, an image T34 showing the surroundings of the road, an image TA35 simulating a speed measuring device, and a target image TA36 surrounding the image TA35 as a target are arranged. As shown in FIG. 31 and FIG. 32, in the animation image, as the speed measurement device is approached over time, the target images TA33 and TA36 repeatedly expand and contract, and their sizes change periodically. After the speed measurement device is closest to the target, an image showing the speed measurement device as seen from a position far away from the target is displayed. Then, the speed measurement device is again approached over time. During the period in which the pulsed light Lout is received, an animation is displayed in which the images of each frame are displayed in the above-mentioned order. When the control unit 11 no longer detects the presence of the optical speed measurement device 30, it stops the notification immediately or after a predetermined time. This predetermined time is preferably three seconds. The first frame in the animation image may be an image showing the speed measurement device as seen from a position far away from the speed measurement device.

<6-3. Radar system notification>
The control unit 11 performs a third notification control to notify the presence of a radar-type speed measuring device in response to receiving a microwave radio wave. FIG. 33 is a diagram showing an example of a notification screen when the electronic device 10 receives light from a radar-type speed measuring device. As shown in FIG. 33, this notification screen is a screen in which an icon I11 indicating the position of the vehicle 40, an icon I12 indicating the installation position of the radar-type speed measuring device, and information display areas TA4, TA5, TB1, and TB2 are arranged on a map M11 in a superimposed manner. The information display areas TB1 and TB2 are the same as the information display areas TB1 and TB2 described in FIG. 27. The information display area TA4 displays the attributes of the speed measuring device and the state of the vehicle 40. The information display area TA4 displays, as attributes of the speed measuring device, a character string TA41 indicating that the device corresponds to the radar type, "radar", a character string TA41 indicating a notification level according to the strength of the radio wave from the speed measuring device, and an icon TA42 indicating that the device is a radar-type speed measuring device. The information display area TA4 displays a character string TA43 (here, 88 km/h) indicating the current speed of the vehicle 40 as the status of the vehicle 40. The information display area TA5 is disposed in the lower left portion of the display screen. The information display area TA5 displays an animation image including an image imitating a speed measuring device. The control unit 11 may notify the user by a predetermined sound in addition to the display.

34 and 35 are diagrams showing an example of an animation image displayed in the information display area T5 of FIG. 33. In FIG. 34 and FIG. 35, the images of each frame are displayed in the order shown by the arrows. When the image of the rightmost frame in the bottom row of FIG. 34 is displayed, the image of the leftmost frame in the top row of FIG. 35 is displayed next. When the image of the rightmost frame in the bottom row of FIG. 35 is displayed, the image returns to the image of the leftmost frame in the top row of FIG. 34. As shown in FIG. 34 and FIG. 35, the animation image includes an image TA51 showing the side of the road, an image TA52 imitating a speed measuring device, and an annular image TA53 imitating microwaves emitted from the speed measuring device. As shown in FIG. 34 and FIG. 35, the animation image is an image in which the image TA53 approaches the speed measuring device over time, and the image TA53 repeatedly expands and contracts, periodically changing in size, and approaches the viewer. In the animation image, after approaching the speed measurement device, an image showing the speed measurement device as seen from a position far away from the speed measurement device (see the frame surrounded by a dashed line) is displayed. Then, in the animation image, the speed measurement device is again displayed as it approaches the speed measurement device over time. During the period when the radar speed measurement device is detected, an animation is displayed in which the images of each frame are displayed in the above-mentioned order. When the control unit 11 no longer detects the presence of the radar speed measurement device, it stops the notification immediately or after a predetermined time. This predetermined time is preferably three seconds. In addition, the period from when the presence of the speed measurement device is no longer detected to when the notification is stopped should be the same for both the optical method and the radar method, but may be different. The first frame in the animation image may be an image showing the speed measurement device as seen from a position far away from the speed measurement device (see the frame surrounded by a dashed line).

36 is a diagram showing the relationship between the received microwave (shown as "radar wave" in FIG. 36) and the notification method. The control unit 11 identifies the received radar wave and changes the notification control depending on the result of the identification. As shown in FIG. 36(a), the radar wave includes stealth waves that emit radio waves only at the moment when a specific stealth enforcement device measures, normal radar waves, new radar waves corresponding to K band and X band, and cancellation notification. The cancellation notification is a function that automatically registers GPS location information when passing through a place that emits radio waves and causes a false alarm, such as an automatic door, and cancels the notification by the radar method when radio waves are received the second or subsequent times the device passes through. As shown in FIG. 36(a), the control unit 11 changes the light color of the light emitting unit 23 depending on the notification level. Also, as shown in FIG. 36(b), the control unit 11 changes the notification sound (e.g., electronic sound) emitted from the speaker 14 depending on the distance between the electronic device 10 and the source of the microwave.

<6-4. Notification regarding other types of speed measurement devices>
In addition, when a speed measurement device is detected, the control unit 11 displays an information display area corresponding to the detection method in the lower right corner of the notification screen. As shown in Fig. 37(a), in the case of an LH system, an information display area TA6 is displayed. As shown in Fig. 37(b), in the case of a loop coil, an information display area TA7 is displayed. The control unit 11 may display animation images for other speed measurement methods as well, but may not display them for some or all of the methods.

<6-5. Collision warning notification>
As shown in FIG. 39(a), the electronic device 10 cooperates with the sensor device 90 to provide a collision warning. The collision warning is an example of a warning based on the positional relationship between the vehicle 40 and another vehicle, and is a function of providing a warning that the vehicle may collide with another vehicle. The sensor device 90 has a function of a vehicle-to-vehicle sensor that detects the distance to another vehicle in front. The vehicle-to-vehicle sensor detects the distance between the vehicles using an infrared method and outputs the detected distance to the electronic device 10. The sensor device 90 and the electronic device 10 are connected via a wired or wireless communication line. The control unit 11 performs a fourth warning control based on the positional relationship between the vehicle 40 and another vehicle. Here, the positional relationship is specified based on the distance between the vehicles. The fourth warning control is a control that provides a warning regarding the collision warning.

Figure 38 is a diagram showing an example of a notification screen for a collision warning. Figure 38 (a) is a screen related to a collision warning, which issues a warning when the vehicle approaches a stopped preceding vehicle. In this screen, an icon I11 indicating the position of the vehicle 40, an information display area TC11, and an information display area TC12 indicating the current speed are displayed on a map M11. Figure 38 (b) is a screen related to a departure warning, which issues a warning when the preceding vehicle starts and the vehicle 40 is stopped. In this screen. An icon I11 indicating the position of the vehicle 40, an information display area TC21, and an information display area TC22 indicating the current speed are displayed on a map M11. Figure 38 (c) is a screen related to an over-close warning, which issues a warning when the distance between the vehicle 40 and the preceding vehicle becomes less than a threshold value while driving. In this screen, an icon I11 indicating the position of the vehicle 40, an information display area TC31, and an information display area TC32 indicating the current speed are displayed on a map M11. When notifying the collision warning, the control unit 11 may notify the driver by sound in addition to the above-mentioned screen display. The duration of the notification may be, for example, 5 seconds, but may be any other duration. As shown in FIG. 38(d), the control unit 11 may change the sound depending on the content of the notification.

<6-6. Notification of warnings regarding distracted driving and drowsy driving>
The control unit 11 performs a fifth notification control to notify the state of the occupant of the vehicle 40 based on an image of a camera that captures the interior of the vehicle 40. The occupant is a person who is in the vehicle 40, and may be a driver, but may be another occupant. As shown in FIG. 39(a), the electronic device 10 cooperates with the camera 70 to notify the alarm regarding distracted driving and drowsy driving. The camera 70 is a camera that captures the interior of the vehicle. The camera 70 detects the state of the user based on the captured image and outputs information corresponding to the state to the electronic device 10. The camera 70 and the electronic device 10 are connected via a wired or wireless communication line. The camera 70 captures at least the face of the user. The camera 70 detects the direction of the user's face and the direction of the line of sight, and notifies information corresponding to the detection result. The camera 70 is attached to the windshield 42, which is higher than the line of sight of the user, by using a predetermined attachment member. The camera 70 may be attached to the rearview mirror 43, the dashboard 41, or other places.

As shown in FIG. 39(b), the control unit 11 issues a distracted driving warning when the user's face is turned to the side by a predetermined angle from the front. FIG. 40(a) is an example of a notification screen that warns of distracted driving. In this screen, an icon I11 indicating the position of the vehicle 40, an information display area TD11, and an information display area TD12 indicating the current speed are displayed on a map M11. FIG. 39(c) is an example of a screen related to a dozing off warning, and when the user closes both eyes for about one second or more, the control unit 11 displays a notification screen that warns of dozing off while driving, as shown in FIG. 40(b). In this screen, an icon I11 indicating the position of the vehicle 40, an information display area TD21, and an information display area TD22 indicating the current speed are displayed on a map M11. When the user closes both eyes for about three seconds or more. As shown in FIG. 39(c) and FIG. 40(c), the control unit 11 changes the background color to display a notification screen that warns of dozing off while driving. On this screen, an icon I11 indicating the position of the vehicle 40, an information display area TD31, and an information display area TD32 indicating the current speed are displayed on a map M11. When notifying the driver of a warning regarding distracted driving or drowsy driving, the control unit 11 notifies the driver by sound in addition to the above-mentioned screen display. As shown in FIG. 39(c) and FIG. 41, the control unit 11 may change the sound associated with the warning depending on at least one of the time the eyes are closed and the number of times the warning has been issued.

<6-7. GPS Warning>
Next, the GPS warning will be described. The GPS warning is a control to notify when the position measured by the GPS receiver 16 is in a predetermined positional relationship with the object to be notified. It is preferable that the GPS warning be performed when the target object approaches within a predetermined distance. The GPS warning may include the notification control described in <6-2. Notification regarding the pulsed light Lout (mobile)>. FIG. 42 shows the GPS warning. There are various notification methods depending on the settings. When the alarm 1000m switch (default value) is set, the control unit 11 switches from the standby screen to the alarm 1km ahead of the object of notification. When the alarm 500m switching is set, the control unit 11 may display the alarm screen from the standby screen when the time reaches 500 before the object of notification. When the screen is set to be fixed, the control unit 11 may display the standby screen regardless of the distance to the object to be notified.

In the case of a GPS warning, if the object to be notified is located at an angle of 25 degrees or more to the left or right of the front of the vehicle 40 with respect to the traveling direction, the control unit 11 may notify the user by adding a voice message indicating the direction of the object to be notified, such as "left direction" or "right direction." In this way, the user can easily understand the direction of the object to be notified.

<6-8. Notification control>
The control unit 11 may display the animation image described above regardless of the location and time of the electronic device 10 when the pulsed light Lout is received, but may change the animation image according to at least one of the location and time. The animation image may be displayed using a photograph of the site where the speed enforcement device is installed or an image represented by CG.

Figure 43 is a table explaining the notification control by the electronic device 10. In Figure 43, "◯" indicates that the notification control is permitted to be executed in parallel with the first notification control or the second notification control for notifying the presence of an optical speed measurement device, and "×" indicates that the notification control is not permitted. The control unit 11 may stop the third notification control during the period in which the first notification control or the second notification control is being performed. In this way, when notifying the presence of the speed measurement device 30, it is possible to prevent the presence of a radar-type speed measurement device from being notified. In addition, even if the control unit 11 detects the presence of a speed measurement device of another type during the period in which the notification screen for receiving pulsed light is displayed, it is preferable not to notify the presence. The other type may be a radar type, and it is preferable to receive microwaves. If the pulsed light has fewer false detections of the speed measurement device than the radar wave, the accuracy of the notification of the speed measurement device is improved. In addition, if the presence of any speed measurement device is notified, the user will consciously drive safely, and there will be less inconvenience.

The control unit 11 may perform the fourth notification control in parallel with the first notification control or the second notification control. As shown in FIG. 44, the control unit 11 may perform a collision warning notification during the period when the notification screen for receiving pulsed light is displayed. This is based on the idea that the collision warning is a high-priority warning. For example, when the control unit 11 performs a collision warning while the notification screen for receiving pulsed light is displayed, the display shown in FIG. 44 is displayed. In this example, the information display areas TA1, TA2, and TC1 are displayed simultaneously. Note that the same may be performed for the departure warning, the close approach warning, and the lane departure warning. In this way, when the need for a collision warning notification arises, the control unit 11 can perform a collision warning even when the vehicle is approaching the speed measurement device 30.

The control unit 11 may be configured to stop the fifth notification control during the period when the first notification control or the second notification control is being performed. The control unit 11 may be configured not to issue a warning regarding distracted driving or drowsy driving during the period when the notification screen for receiving pulsed light is being displayed. In this way, when a need arises for a collision warning, the control unit 11 can issue a collision warning even when a warning regarding the user's distracted driving or drowsy driving should be issued.

The control unit 11 may perform the fourth notification control in parallel with the third notification control. When the presence of a radar-type speed measuring device is detected and the notification screen is displayed, a collision warning is issued. This is based on the idea that a collision warning is a high-priority warning. For example, when the control unit 11 detects a radar-type speed measuring device and displays the notification screen, in order to issue a collision warning, the control unit 11 causes the display shown in FIG. 45 to be displayed. In this example, the information display areas TA4, TA5, and TC1 are displayed simultaneously. Note that the same may be performed for the departure warning, the close approach warning, and the lane departure warning. Meanwhile, the control unit 11 may stop the fifth notification control during the period in which the third notification control is being performed. In this way, when the presence of the speed measuring device 30 is notified, it is possible to prevent an alert regarding distracted driving or drowsy driving.

The notification control of the electronic device 10 may have a relationship other than the relationship shown in the table shown in FIG. 43. When a first event and a second event occur simultaneously as events to be notified, the control unit 11 may perform a notification regarding the first event with a higher priority, while stopping the notification regarding the second event with a lower priority. In this way, it is possible to make it easier for the user to grasp the occurrence of the first event with a higher priority. The control unit 11 may also notify both the first event and the second event simultaneously. In this way, it is possible to make the user grasp information on both the first event and the second event. The control unit 11 may also notify the occurrence of three or more events simultaneously. In addition, the control unit 11 may make the periods for which notifications are made for the first event and the second event coincide with each other, but may also make them different. In addition, the combination of the first event and the second event may be predetermined at the design stage, etc., or may be set by the user. In addition, when two or more notification controls are performed in parallel, the display notifications may be performed in parallel, but at least one of the sound notifications may be stopped.

In addition, the electronic device 10 may be configured not to issue a notification using either or both of the optical and radar methods when the speed of the vehicle 40 is below a predetermined speed. This is because there are relatively few safety issues when the vehicle 40 is traveling at the predetermined speed, making notification unnecessary. However, when the vehicle 40 is traveling on a predetermined type of road, such as a green belt, the electronic device 10 may be configured to issue a notification using either or both of the optical and radar methods. The predetermined speed may be, for example, 30 km/h, but may be another speed. In this way, depending on the position of the vehicle 40, if the presence of the speed measurement device 30 should be notified even if the speed of the vehicle 40 is below the predetermined speed, this can be notified.

In addition, while the electronic device 10 has a cancellation function corresponding to the radar method, it is preferable that it does not have a cancellation function corresponding to the optical method. This is because it is believed that the optical method is less likely to cause false alarms that can occur with the radar method.

Furthermore, the electronic device 10 may notify the content and timing of the information about the notification object according to the tables shown in Figures 46 to 48.

[7. Mechanism of Electronic Device 10]
FIG. 49 is a perspective view showing an example of the external configuration of the electronic device 10. FIG. 50 and FIG. 51 are six-sided views showing an example of the external configuration of the electronic device 10. FIG. 50 shows a front view, a top view, a right side view, a bottom view, and a left side view of the electronic device 10. FIG. 51 shows a rear view of the electronic device 10. In this example, the housing 100 of the electronic device 10 is divided into a first housing 1001 located on the front side and a second housing 1002 located on the rear side. The display unit 13, the light emitting unit 23, and the illuminance sensor 201 of the sensor unit 20 are provided on the front side of the first housing 1001. The display area of the display unit 13 is located in the opening on the front side of the first housing 1001. A speaker 14 is provided so as to output sound from the upper end surface of the second housing 1002. The right end surface of the housing 100 is provided with an attachment unit 21 (i.e., an SD card slot) for attaching an SD card. The light receiving unit 12 is provided in the upper right part of the rear surface of the housing 100. Furthermore, a power switch 221 and a DC jack 222 of the power supply unit 22 are provided on the lower left side of the rear surface of the housing 100 .

As shown in FIG. 51, the cover 1003 is provided on the back of the second housing 1002. The cover 1003 is provided at a position closer to the upper right of the second housing 1002 when viewed from the back. The cover 1003 is a detachable cover for the second housing 1002, and is a member that is longer in the left-right direction than in the up-down direction. The cover 1003 is a light-transmitting portion formed of a material that transmits at least the pulsed light Lout. The cover 1003 is preferably formed of the same material as the housing 100, but may be formed of a different material. The cover 1003 is formed of resin or other materials. The cover 1003 is preferably formed of a material that blocks visible light and functions as a visible light cut filter, but may not. The cover 1003 may be a semi-transparent or transparent member. Also, instead of the cover 1003, a light-transmitting portion that transmits at least the pulsed light Lout may be formed on the back of the housing 100.

Figure 52 is a rear view showing the state in which the cover 1003 is removed from the second housing 1002. As shown in Figure 52, the second housing 1002 has a first window 101 and a second window 102 formed therein. The first window 101 and the second window 102 are openings for guiding external light into the inside of the housing 100. However, the first window 101 and the second window 102 may have a member such as a lens that transmits at least light of a specific wavelength. The first window 101 and the second window 102 are arranged at a predetermined interval in the left-right direction. The first window 101 and the second window 102 are circular, but may have other shapes. Pulsed light enters the inside of the housing 100 through the first window 101 and the second window 102. If the cover 1003 is a semi-transparent or transparent member, the first window 101 and the second window 102 can be seen by the user. This may have a design appeal.

Figure 53 is an exploded perspective view of the electronic device 10. As shown in Figures 53(a) and (b), the display unit 13, the first substrate 1010, and the second substrate 1030 are housed in the housing 100 of the electronic device 10, in that order from the first housing 1001 side. The first substrate 1010 is a rectangular substrate that is longer in the left-right direction than in the up-down direction in a plan view. The display unit 13 is mounted on the first surface on the front side of the first substrate 1010. The control circuit 1331 is mounted on the first surface of the first substrate 1010. The control circuit 1331 may be configured to realize some or all of the functions of the control unit 11. The control circuit 1331 may be, for example, an integrated circuit (IC). The control circuit 1331 is one here, but may be replaced by two or more control circuits. The microwave receiving unit 15 is mounted on the second surface opposite the first surface of the first substrate 1010. The microwave receiving unit 15 is approximately rectangular. The second housing 1002 contains these components and is screwed to the first housing 1001.

Figure 54 is a rear view showing the state in which the second housing 1002 is further removed from the electronic device 10. Figures 55, 56, and 57 are perspective views showing the internal configuration of the electronic device 10 in this state. The second substrate 1030 is arranged on the rear side of the first substrate 1010 so as to overlap the first substrate 1010. The second substrate 1030 is a substrate that is approximately L-shaped in a plan view. The second substrate 1030 has such a shape because the area where the microwave receiving unit 15 is present is cut out. In this way, the increase in thickness of the electronic device 10 can be suppressed compared to the case in which the microwave receiving unit 15 is overlapped by the second substrate 130. The light receiving unit 12 is mounted in the first region Ar3 of the second substrate 1030 that is long in the vertical direction. The first wavelength selection unit 121 and the first light receiving element 122 are provided facing the first window 101. A second wavelength selection section 123 and a second light receiving element 124 are provided facing the second window 102.

The first wavelength selection unit 121, the first light receiving element 122, and the second wavelength selection unit 123 and the second light receiving element 124 are housed in a shield case 1031 facing the second window 102. The shield case 1031 is formed of, for example, a conductive material (for example, metal) and is a member for preventing the elements of the light receiving unit 12 from generating noise due to the influence of electromagnetic waves from the outside. The source of the electromagnetic waves is an electrical component such as a drive unit that drives the wipers provided on the vehicle 40. The shield case 1031 has a partition wall for separating the space in which the first light receiving element 122 is housed from the space in which the second light receiving element 124 is housed. This partition wall also prevents the propagation of pulsed light. In this way, the signals output by the first light receiving element 122 and the second light receiving element 124 are less susceptible to electromagnetic noise than when they are not shielded with a conductive material. Furthermore, the presence of the partition reduces the possibility that light transmitted through the first wavelength selection section 121 is received by the second light receiving element 124, and that light transmitted through the second wavelength selection section 123 is received by the first light receiving element 122.

In the second substrate 1030, the second region Ar4 is mounted with the GPS receiver 16 and the speaker 14. The second region Ar4 is shorter in the vertical direction than the first region Ar3 and protrudes upward than the first region Ar3. It is preferable that the GPS module is mounted on the first surface of the GPS receiver 16 on the front side, and the GPS antenna is mounted on the second surface of the rear side. The GPS antenna is disposed above the microwave receiver 15 in order to ensure upward directivity. In addition, in order to ensure space for the GPS receiver 16, the second region Ar4 in the second substrate 1030 protrudes upward from the first region Ar3. The microwave receiver 15 is located below the GPS receiver 16 and the speaker 14. The mounting section 21 is mounted on the left side of the first substrate 1010. Below the mounting section 21, the power switch 221, the DC jack 222, and the button battery 223 of the power supply section 22 are provided. The button battery 223 is an internal power source for the electronic device 10. In addition, the wireless module 171 of the communication unit 17 is mounted on the front side of the second substrate 1030, opposite the first area Ar3.

Figure 58 shows a photograph of the second board 1030. Figure 58(a) is a view from the back side, and Figure 58(b) is a view from the front side. The GPS receiver 16 is mounted in the area indicated by "(16)" in Figure 58(a), and the speaker 14 is mounted in the area indicated by "(14)". The light receiving unit 12 is mounted in the area surrounded by a white line on the second board 1030. Figure 59 shows the electrical configuration of the light receiving unit 12. The first light receiving element 122 is a photodiode PD1 here. Light that passes through the first wavelength selection unit 121 is incident on the light receiving surface of the photodiode PD1. The cathode of PD1 is connected to the high-potential power line, and the anode is connected to one end of the resistor R1. The other end of the resistor R1 is grounded. The input end of the amplifier IC1 (1/2) is commonly connected to the anode of the photodiode PD1 and one end of the resistor R1. The output terminal of the amplifier IC1 (1/2) is connected to the negative input terminal of the differential amplifier AMP. The second light receiving element 124 is a photodiode PD2 here. Light passing through the second wavelength selection unit 123 is incident on the light receiving surface of the photodiode PD2. The cathode of the photodiode PD2 is connected to the high potential power line, and the anode is connected to one end of the resistor R2. The other end of the resistor R2 is grounded. The input terminal of the amplifier IC1 (2/2) is commonly connected to the anode of the photodiode PD2 and one end of the resistor R2. The output terminal of the amplifier IC1 (2/2) is connected to the positive input terminal of the differential amplifier AMP. The amplifier IC1 (1/2) and the amplifier IC1 (2/2) output their outputs at 1/2. A signal corresponding to the difference between the amounts of light received by the photodiodes PD1 and PD2 is output from the output terminal of the differential amplifier AMP. The control unit 11 detects the speed measuring device 30 based on this difference. The control unit 11 detects the speed measurement device 30 based on the signal after it is amplified by the differential amplifier AMP, and then passes through the amplifier Q1 and the amplifier IC2 (2/2) and the waveform is shaped.

Figure 60 is a graph showing an example of the filter characteristics of the first wavelength selection unit 121 and the second wavelength selection unit 123. Here, the first wavelength selection unit 121 is a band pass filter. As shown in Figure 60 (a), it transmits light in a wavelength range including a specific wavelength λout 905 nm, which is the target wavelength, and blocks light in other wavelength ranges. The width of the wavelength range through which light is transmitted is, for example, 20 nm, but it is more preferable that it is narrower than this. The second wavelength selection unit 123 is, for example, a band elimination filter. As shown in Figure 60 (b), the second wavelength selection unit 123 blocks light in a wavelength range including a specific wavelength λout, and transmits light in other wavelength ranges, which are non-target wavelengths. The width of the wavelength range through which light is blocked is, for example, 20 nm, but it is more preferable that it is narrower than this.

In Figure 60, the transmittance of the frequency range through which light passes is greater than 80%, and the frequency range through which light is blocked is less than 15%, but any transmittance that is tolerable for practical use may be used. It is desirable for the wavelength selection section to exhibit steep characteristics as exemplified in Figure 60, but it may also exhibit broader characteristics.

When the second substrate 1030 is further removed from the electronic device 10, the state shown in FIG. 61 is obtained.

[8. Other Examples of Electronic Devices]
FIG. 62 is a perspective view showing the external configuration of an electronic device 80, which is another example of the electronic device. FIG. 63 is a perspective view showing the external configuration of the electronic device 80 when viewed from the right front side with respect to the traveling direction of the vehicle. As shown in FIG. 62 and FIG. 63, the electronic device 80 is a box-shaped device having a substantially rectangular parallelepiped shape. The electronic device 80 does not have a display unit 13, and outputs various signals to an external device via a wired cable 81. The electronic device 80 may communicate with an external device via a wireless communication path. The electronic device 80 is divided into a first housing 801 located at the top and a second housing 802 located at the bottom. A lid portion 803 is provided on the front side of the electronic device 80. The lid portion 803 is a light-transmitting member formed of a material that transmits pulsed light, similar to the lid portion 1003.

64, 65 and 66 are perspective views showing the internal configuration of the electronic device 80. As shown in Figs. 63 to 65, inside the electronic device 80, the first board 810, the second board 820 and the third board 830 are arranged from bottom to top at a distance from each other. The button battery 811 is provided on the first board 810 and is the internal power source of the electronic device 80. What is different from conventional electronic devices is that the light receiving unit 841 is formed on the fourth board 840 so as to receive pulsed light from the front side in the traveling direction of the vehicle, and the antenna unit 850 of the microwave receiving unit is arranged adjacent to it. The light receiving unit 841 may have the same configuration as the light receiving unit 12 and is electrically connected to the fourth board 840. The fourth board 840 is electrically connected to the first board 810 via a terminal not shown. The antenna unit 850 is a part of the microwave receiving unit that functions as an antenna. The antenna unit 850 is configured by a predetermined pattern formed on the board. A processing circuit 851 that processes signals from the antenna unit 850 of the microwave receiving unit is mounted on the second board 820. A GPS receiving unit 860 is mounted above the third board 830. With this configuration, the electronic device 80 performs notification control to output a notification using sound or display to an output destination (e.g., a conventional laser detector) connected to the outside via the cable 81 to notify information. The function related to this notification may be the same as that of the electronic device 10. The antenna unit 850 is disposed in a position adjacent to the fourth board 840. It is preferable that the normal direction of the antenna unit 850 and the normal direction of the fourth board 840 intersect, and it is particularly preferable that they are parallel.

In this way, it is possible to provide a technology for notifying users of the presence of a speed measurement device while minimizing changes to existing systems.

9. Noise Reduction Method
When the source of noise is the circuit of the light receiving unit 12 itself, it is effective to lower the gain of the amplifier to lower the noise floor. In contrast, if the C/N ratio in the light receiving unit is improved, the gain of the amplifier can be increased, which is desirable. Noise may come from the amplifier circuit itself, which is random noise. The amplifier circuit refers to the circuit part rather than the photodiode. Therefore, in order to suppress noise, it is advisable to adopt a configuration in which the output of the light receiving unit 12 is put into two sets of amplifier circuits (amplifier circuit 1 and amplifier circuit 2). In this example, as shown in FIG. 67, if the noise peak exceeding the threshold Th of the amplifier circuit 1 is peak N1, the peak of the signal when pulsed light is received is peak P1, the noise peak exceeding the threshold Th of the amplifier circuit 2 is peak N2, and the signal when pulsed light is received is peak P2, the probability that N1 and N2 coincide in time is very low, and P1 and P2 coincide. Therefore, if the simultaneous detection of both N1 and N2 is regarded as the reception of pulsed light, it is considered that the noise reduction is mitigated and the detection accuracy is improved. As shown in Fig. 67, if there is a difference in the peak values exceeding the thresholds of the two circuits by setting (P1 + P2)/2, the peak value can be lowered by adding them and dividing by 2. A comparator may be used to determine whether there is such a difference in the peak values.

In this embodiment, since amplifier Q1 is a noise source, it is preferable to replace amplifier Q1 with an amplifier in circuit 1 and an amplifier in circuit 2 and a circuit that halves their outputs. Also, an integrating circuit may be provided in the circuit of light receiving unit 12. Also, circuit 1 may be integrated with an integrating circuit using a capacitor or the like, circuit 2 may be left as is, and a comparator may be provided.

10. Other embodiments
(10-1) The electronic device 10 may be a system that issues an alarm when it detects a reflective pattern that looks like a police officer is present. The reflective pattern is a reflective pattern that is placed at a predetermined location where a police officer is likely to be present. This pattern may be a pattern used on a predetermined sign or police uniform. The electronic device 10 may use the on-board camera 50 to obtain an image of the area in front of the vehicle 40, analyze the image, and detect the presence of a predetermined reflective pattern. In this way, the presence of a police officer can be notified in a location where the police officer is likely to be present, and the possibility of a false alarm can be reduced. The alarm may be issued by a display, a sound, or a combination of these.

(10-2) In (10-1), the warning may be a speed enforcement warning. The speed enforcement warning may be a warning that a speed enforcement point is approaching.

(10-3) The pattern of the reflective material that gives the appearance of a police officer to be detected should include at least two of the following: a horizontal line corresponding to the position of a person's waist, a vertical line corresponding to a baton, a line corresponding to the horizontal position of a helmet, a line corresponding to a sash, and a line corresponding to the V-shape of a vest. For example, it is particularly effective to detect lines in the order of diagonal, horizontal, and vertical from the top.

(10-4) The electronic device 10 may detect the reflective pattern that gives the appearance of a police officer based on detecting a reflection level that corresponds to the retroreflective tape.

(10-5) The electronic device 10 may suppress detection of a reflective pattern that would make it appear as if the police officer is present at a position higher than the height of a person. As a suppression method, it may be preferable to prevent detection of parts above a certain height in advance. It may also be preferable to prevent detection of the pattern if it is detected above a certain height. It may also be a condition that all components of the reflective pattern are included within the vertical height of a person (for example, within 2 m).

In (10-5), the electronic device 10 should also exclude positions that correspond to the road surface to prevent misidentification of stop lines on the road surface. Stop lines on the road surface are excluded because they consist of vertical and horizontal lines and may produce the same amount of light as retroreflection.

(10-6) The electronic device 10 may store location information of locations where reflective patterns that give the appearance of police officers have been installed in advance, and may suppress the alarm at the stored locations.

(10-7) The electronic device 10 may change the manner of the warning depending on the number of reflective patterns that indicate the presence of a police officer that are detected. For example, when one reflective pattern that indicates the presence of a police officer is detected, a crackdown warning may not be issued as the warning, and when multiple reflective patterns that indicate the presence of a police officer are detected, a crackdown warning may be issued as the warning.

(10-8) The electronic device 10 may suppress the alarm if only one reflective pattern that resembles the presence of a police officer is detected within a predetermined time period. The electronic device 10 may decide whether to issue an alarm based on the number of detections within a predetermined time window. The predetermined time period may be about 2 seconds.

(10-9) The electronic device 10 may detect the reflective pattern that gives the appearance of a police officer based on a video signal captured by a camera installed in a drive recorder. There is a possibility that the pattern can be detected from a distance farther than the detection range of the pulsed light.

(10-10) The electronic device 10 should detect the reflective material pattern that gives the impression of a police officer not in the rear, not in the passing lane in the front, but to the left of the driving lane.

(10-11) The electronic device 10 has a function of issuing an alarm when it detects electromagnetic waves (e.g., pulsed light or microwaves) for measuring the speed of a vehicle traveling on a road, and even if it detects a pattern of reflective material that looks like a police officer, if it detects electromagnetic waves for measuring the speed of a vehicle traveling on the road, it is preferable to give priority to the alarm when electromagnetic waves for measuring the speed of a vehicle traveling on the road are detected, and suppress the alarm when a pattern of reflective material that looks like a police officer is detected.

(10-12) The electronic device 10 has a function for issuing an alarm when it detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, and when it detects a pattern of reflective material that resembles the presence of a police officer and detects electromagnetic waves for measuring the speed of a vehicle traveling on a road, it is preferable that it issues an alarm different from the alarm issued when the electromagnetic waves are detected alone (in particular, an alarm indicating a higher level of urgency is issued).

(10-13) The electronic device 10 may be equipped with an infrared detection device for detecting the presence or absence of an object, and may be equipped with a function for determining (guessing) the type of crackdown based on the detection of a reflective pattern that resembles the presence of a police officer. If there is no person and there is reflective material, it is likely that it is only an automatic speed camera. If there is a person and there is reflective material, it is likely that there is a wide range of crackdowns, including an automatic speed camera. The control unit 11 may notify information based on the results of such type determination. The notification may be made using different display and/or sound.

(10-14) When the electronic device 10 recognizes a moving object that matches the pattern of a night police sign, it should determine that it is a police officer rather than a night police sign. The control unit 11 cancels the vehicle behavior and makes the calculation.

(10-15) The electronic device 10 should have a function to suppress (e.g. not execute) night police warnings during the day (or when it is bright). In particular, it is advisable not to even recognize night police signs.

11. Other embodiments
Further, other embodiments will be described. The section [11. Other embodiments] may include configurations based on ideas common to the matters described in other sections.

The electronic device 10 may have a protruding portion used for receiving pulsed light from the speed measuring device 30. For example, the electronic device 10 may have a shape in which the portion where at least a portion of the light receiving unit 12 is provided protrudes more than other portions. Specific embodiments of such a configuration are described below.

(11-1) The electronic device 10 may have a light entrance portion at a position protruding forward in the vehicle's travel direction (e.g., the normal direction of the display screen of the display portion) from the rear or side of the housing. The entrance portion is a portion of the electronic device 10 where light is received by the light receiving portion. The entrance portion is a portion included in the external appearance of the electronic device 10. For example, the portion of the electronic device 10 where the above-mentioned cover portion 1003 is provided is the entrance portion, and the portion where the first window 101 or the second window 102 is provided is also the entrance portion.

By doing this, the light can be received further forward, making it less susceptible to the effects of obstacles that block the laser light. In particular, when the light is received after passing through the windshield, the effect of light from the speed measuring device 30 being refracted by the windshield can be reduced by installing the incident section closer to the windshield. In particular, when the display section and light receiving section are integrated into a housing, this configuration allows for simple and easy installation inside the vehicle cabin and reduces the effects mentioned above.

In the example of FIG. 68(a), a first portion 10041 and a second portion 1042 that protrudes forward from the first portion 1041 in the traveling direction of the vehicle are provided on the rear surface 1004 of the housing 100 of the electronic device 10. The first portion 1041 is flat. The second portion 1032 here has a hemispherical shape. A part or the whole of the second portion 1042 corresponds to the incident portion.

The second portion 1042 may be located, for example, above the center in the vertical direction of the rear surface 1004. Compared to a position below, the second portion 1042 may be less susceptible to the influence of obstacles blocking the light from the speed measuring device 30. The second portion 1042 is provided to the right of the center in the horizontal direction of the rear surface 1004 when viewed from the rear side in the traveling direction of the vehicle (preferably the side where the passenger compartment is located). Alternatively, the second portion 1042 may be provided to the left of the center in the horizontal direction of the rear surface 1004 when viewed from the rear side in the traveling direction of the vehicle. In this case, the incident portion is located on the left side in the traveling direction of the vehicle, which is closer to the speed measuring device 30, and this may be desirable from the perspective of light reception.

(11-2) The electronic device 10 may have an entrance portion protruding from the rear or side of the housing to the left of the vehicle's travel direction (or in a direction parallel to the display screen of the display portion).

(11-3) The electronic device 10 may have an entrance portion at a position that protrudes from the rear or side of the housing toward the front left in the direction of travel of the vehicle (or toward the left in a direction that intersects with the normal to the display screen of the display unit 13). In this case, it is preferable that the entrance portion has a surface whose normal direction is diagonally left.

In the example of FIG. 68(b), a first portion 1041 and a second portion 10042A that protrudes forward and to the left in the traveling direction of the vehicle from the first portion 1041A are provided on the rear surface 1004A of the housing of the electronic device 10. Here, the second portion 1042A is prism-shaped. A part or all of the surface 1043 on the tip side of the second portion 1005B corresponds to the incident portion. The surface 1043 is not parallel to the first portion 1041, but faces in an oblique direction with respect to the traveling direction of the vehicle. In this case, the incident portion is located closer to the speed measuring device 30 and on the left side in the traveling direction of the vehicle, which may be desirable from the viewpoint of light reception.

Surface 1043 may be, for example, a flat surface, but may also include a curved portion facing forward and left (for example, the curved surface may be an arc or sphere). The position at which second portion 1042A is provided on back surface 1004A can be modified in various ways, similar to the position at which second portion 1042 is provided on back surface 1004.

In this configuration, at least one of the light receiving elements of the light receiving unit 12 may be provided inside the second portion 1042A and may be arranged facing the direction in which the surface 1043 faces.

In the configurations (11-1) to (11-3), the length in the protruding direction of the portion protruding from the rear surface of the housing (e.g., second portion 1042, 1042A) may be smaller or larger than the thickness of the housing of the electronic device 10. In the example of FIG. 69(a), the rear surface 1004B of the housing 100 of the electronic device 10 is provided with the first portion 1041 and the second portion 1042B protruding forward in the traveling direction of the vehicle from the first portion 1041. The length in the protruding direction of the second portion 1042B is smaller than the thickness of the housing. In the example of FIG. 69(b), the rear surface 1004C of the housing 100 of the electronic device 10 is provided with the first portion 1041 and the second portion 1042C protruding forward in the traveling direction of the vehicle from the first portion 1041. The length in the protruding direction of the second portion 1042D is larger than the thickness of the housing.

In the configurations (11-1) to (11-3), the portion protruding from the rear surface of the housing may be rectangular, cubic, cylindrical or other columnar. The surface at the tip of this protruding portion may be flat, an inclined surface inclined with respect to the surface of the first portion 1041, a curved surface or a surface of other shape. At least a portion of the protruding portion may be semi-cylindrical, spherical, triangular prism-shaped, lens-shaped, prism-shaped or the like to change the light path or provide light focusing. A sensor may be provided at the destination of the light path change or the destination of the light focus.

(11-4) The incident portion may be provided separately from the housing 100. The incident portion may be provided in a location that is in physical contact with the housing 100, or in a location that is not in physical contact with the housing 100. For example, the light incident on the incident portion may be received by the light receiving portion, and a signal corresponding to the received light may be supplied to the control unit 11. In this way, even if there are restrictions on changing the position or attitude of the housing 100, for example, from the standpoint of ease of viewing the display unit 13, the position or attitude of the incident portion can be adjusted to make it easier to receive light from the speed measuring device 30.

The electronic device may include a connector for connecting wiring that outputs a signal corresponding to the reception of light from the "separate body," and the control unit may perform notification control based on the signal corresponding to the reception of light input via the connector.

As a "separate" part of (11-5) and (11-4), the incident part may be provided on a mounting member that is attached to the vehicle. In this case, the mounting member may be provided at the position of the incident part of (11-1) to (11-3). In this case, the mounting member may be attached to the housing by adhesive, fasteners, or other methods.

(11-6) It would be a good idea to use a drive recorder as a "separate entity" from (11-4).

The "separate part" of (11-7) and (11-4) may be an attachment part for the drive recorder. This attachment part is a part for attaching the drive recorder to a specified attachment part of the vehicle. The attachment part is, for example, a part that is physically connected to the drive recorder, and may include, for example, a part that makes surface contact with the attachment part. The attachment member is, for example, attached to the windshield of the vehicle, and may have an incident part on the attachment surface side of the windshield.

(11-8) The configuration is not limited to one in which the housing has a function for performing notification control, and the housing may also have a drive recorder function.

(11-9) The incident section may be configured to be detachable from the housing. For example, the housing may be provided with a mounting section for mounting the incident section. The mounting section may be provided with a fixing section for fixing the incident section.

(11-10) It is preferable to provide an adjustment means for adjusting the orientation of the incident part relative to the housing. The adjustment means may have a structure similar to that used to adjust the orientation of the camera in a mirror-type drive recorder. In addition, the housing may be equipped with a camera, and the orientation of the camera and the incident part may be adjusted independently.

(11-11) In the electronic device 10, when the control unit 11 determines that light from the speed measuring device 30 has been received, it is preferable to record the video and the values of various sensors before and after the light has been received. The control unit 11 may also record information on whether the area in which the vehicle is located is within a specified area such as the zone 30.

(11-12) In the electronic device 10, the control unit 11 may record setting information related to notifications (e.g., alarms) when light is received from the speed measuring device 30 together with the position information, etc.

(11-13) In a configuration in which the electronic device 10 executes notification control when it receives a specific radio wave (e.g., microwave), it is preferable that the entrance portion is arranged forward of the microwave receiving portion 15 in the traveling direction of the vehicle. Here, "arranged forward" means that the entrance portion protrudes forward of the microwave receiving portion 15.

(11-14) In a configuration in which the electronic device 10 executes notification control when the position information acquired from the GPS receiver 16 satisfies a predetermined condition, it is preferable that the entrance part is arranged forward of the GPS receiver 16 in the direction of travel of the vehicle. Here, being arranged forward preferably means that the entrance part protrudes forward of the microwave receiver 15. Here, the predetermined condition may be that the current position indicated by the position information acquired from the GPS receiver 16 and the position indicated by the position information stored in the memory 18 are in a predetermined proximity relationship.

(11-15) In a configuration in which the electronic device 10 includes the light-emitting unit 23 or other light-emitting unit, the incident unit may be provided on the surface opposite to the surface on which the light-emitting unit is provided. If the light-emitting unit is provided on the front side of the housing 100, the light-emitting unit may be provided on the rear side.

(11-16) The portion where light enters to obtain the second amount of received light corresponding to the second window 102 (hereinafter referred to as the "second incident portion") may be provided within the protruding portion where the incident portion is provided. In this case, the second incident portion may be provided within the protruding portion where the incident portion is provided, in the same orientation as the incident portion. The second incident portion may be provided within the protruding portion where the incident portion is provided, in a different orientation from the incident portion.

(11-17)
The second incident portion may be provided in a portion of the housing different from the protruding portion where the incident portion is provided. The second incident portion may be provided in the protruding portion where the incident portion is provided, in the same orientation as the orientation of the incident portion. The second incident portion may be provided in the protruding portion where the incident portion is provided, in an orientation different from the orientation of the incident portion.

(11-18)
In the case where the electronic device 10 has a predetermined proximity relationship with at least one of the zone 30, a one-lane road, a school, a kindergarten, or a nursery school, the control unit 11 of the electronic device 10 may increase the possibility that the device is the speed measurement device 30 or decrease the possibility that the device is the source of a false alarm when it determines that the pulsed light has been received. The zone 30 is an area where a speed limit of 30 km/h is implemented in order to restrict the driving speed of vehicles within the area and the passing through of the area.

There are optical speed measuring devices that are portable and those that are fixed to the roadside or on the road, but portable devices are often irregularly carried to such places and installed for measurement, so drivers need to be extra careful, but this method can more reliably notify drivers in such places. Furthermore, even if the possibility of a false alarm increases in such places, the inventors have found that because these are places where special caution is required for accidents, drivers can be made aware of safety in such places even if the possibility of a false alarm increases.

(11-19) When the control unit 11 of the electronic device 10 determines that it is at least one of a predetermined time period such as late at night, a predetermined weather condition such as bad weather, and driving on a predetermined road such as a road with multiple lanes, it is preferable to increase the possibility that it is a speed measuring device 30 or decrease the possibility that it is a source of a false alarm.

The inventors found that portable types of sensors often do not perform measurements in such situations because the possibility of erroneous measurements increases. In this way, it is possible to reduce false alarms in particular in such situations. In particular, in such situations, there is a high possibility that light from headlights, etc., from other vehicles will be incident on the light receiving unit directly or indirectly through diffuse reflection, etc., increasing the possibility of false alarms, but by doing this, it is possible to reduce such problems.

(11-20) The second light receiving element 124 may be used to detect the state of light other than that from the speed measuring device 30. The control unit 11 of the electronic device 10 may detect the state of light other than that from the speed measuring device 30 based on the light received by the second light receiving element 124. The control unit 11 may, for example, have a function to change the brightness of the screen/light emitting element (LED, etc.) according to the amount of surrounding light, a function to switch the screen between a daytime display and a nighttime display, detect whether the vehicle is traveling in a tunnel, and detect whether the wipers are operating. Whether the wipers are operating may be detected based on the periodicity of the light being blocked, such as whether the wipers are Hi or Low.

In this way, in cases where the electronic device 10 has a function for detecting the light conditions around the electronic device 10 and performing control based on the detection results, there is no need to provide a separate sensor for detecting the light conditions around the electronic device 10, which reduces costs and makes it easier to miniaturize the device (housing).

(11-21) It has already been explained that the light receiving unit may be provided outside the vehicle and the part that realizes the function of performing notification control may be provided inside the vehicle, but it is also preferable to do the following. The light receiving unit may be provided in a position toward the front of the vehicle within the range of the vehicle's wheel height direction (particularly within the range of the width of the license plate height). The light receiving unit may be provided in a camera installed outside the vehicle cabin to capture images of the front or left front of the vehicle (this may include part of the left side), or may be configured so that it can be installed adjacent to the camera. It is preferable that the image captured by the camera and the signal corresponding to the light received by the light receiving unit can be routed through a single cable. In this case, it is preferable that both signal lines are placed within the same coating.

(11-22) The light receiving unit should be located in the vehicle cabin forward of the driver's seat and at a height that is the same as the height range of the components through which light passes from outside the vehicle cabin to inside the vehicle cabin. This can reduce the blocking of light by the wipers on sunny days, allowing for more reliable detection.

The light receiving unit should have a means for installing it at a position that does not overlap with the initial position of the wiper as seen from inside the vehicle. The light receiving unit should be installed as low as possible in the vehicle. This makes it less likely to obstruct the forward visibility while driving, and reduces the blocking of the light from the speed measuring device 30, allowing for more reliable detection of the speed measuring device 30. The light receiving unit should be located, for example, at the position of the license plate. The light receiving unit should be located on the left side of the vehicle in the direction of travel. Since the light from the speed measuring device 30 is irradiated diagonally toward the vehicle from the left sidewalk, the possibility of being in the shadow of the preceding vehicle can be reduced. In particular, when the preceding vehicle is traveling with a vehicle several meters ahead of the vehicle, the possibility that the light irradiated diagonally toward the vehicle from the left sidewalk is blocked by the preceding vehicle and detection cannot be performed can be reduced, and the fluttering of the state in which the light from the speed measuring device 30 is sometimes detected and sometimes not detected when the distance between the vehicle and the preceding vehicle fluctuates can be reduced.

The control unit 11 of the electronic device 10 may provide a notification that it will be difficult to receive light from the speed measuring device 30 when the distance to the preceding vehicle is in a predetermined close proximity state. The control unit 11 may change the sensitivity of receiving light from the speed measuring device 30 depending on whether the distance to the preceding vehicle is in the predetermined close proximity state or not. For example, the sensitivity may be increased when the distance to the preceding vehicle is in the predetermined close proximity state compared to when it is not.

(11-23) The control unit 11 determines that the light is from an object to be notified when it matches or is similar to the light pattern sent out from the speed measurement device 30. It may also determine that the light is not from an object to be notified when it does not match or is not similar to this pattern. The light pattern sent out from the speed measurement device may be determined by program logic. Information about the light pattern may be stored in advance in the storage means (for example, storage example 1: parameters (11-24) to (11-26) below, storage example 2: information about the degree of change in the amount of light over time (11-24) to (11-26) below, etc.), and a determination may be made as to whether the light is similar to the stored pattern.

(11-24) The control unit 11 of the electronic device 10 may determine that the speed measuring device 30 is present when it receives light that changes between on and off at a predetermined time interval (e.g., every tens of microseconds). The control unit 11 may not determine that the speed measuring device 30 is present when any other light is received. In this case, the on time may be, for example, on the order of nanoseconds, and the off time on the order of tens of microseconds.

When the control unit 11 of the electronic device 10 detects that the light is turned on for a predetermined on-time (for example, a very short time) and turned off for a longer predetermined off-time (much longer than the very short time) repeatedly, it may determine that the light is from the speed measuring device 30. When the light is anything other than this, the control unit 11 of the electronic device 10 may determine that the light is not from the speed measuring device 30.

(11-25) The control unit 11 of the electronic device 10 may determine that the speed measuring device 30 is present when light is received whose amount of light changes periodically (for example, swept horizontally (left and right)) at a predetermined time interval (for example, about several tens to several hundreds of ms). The control unit 11 may not determine that the speed measuring device 30 is present when light other than this is received.

(11-26) In the configurations of (11-24) to (11-25), the control unit 11 may determine that the speed measurement device 30 is present based on light received at multiple timings. For example, when the control unit 11 determines that the speed measurement device 30 is present based on light received at multiple predetermined timings, the speed measurement device 30 is ultimately present.

(11-27) An electronic device for a vehicle (e.g., an alarm device) that has an antenna unit and a display unit in separate housings, the antenna unit is electrically connected to the display unit, and the display unit performs a predetermined notification control (e.g., an alarm) based on a signal received by the antenna unit, the light receiving unit is provided in the housing of the antenna unit, or in a housing separate from the housing of the antenna unit and the housing of the display unit, and the display unit may have a function of notifying (e.g., issuing an alarm) regarding optical vehicle speed measurement based on a signal regarding the light receiving state of the light receiving unit from the housing that includes the light receiving unit. The antenna unit is one or both of the antenna of the GPS receiving unit and the antenna of the microwave receiving unit. The antenna unit is preferably connected to the monitor unit by wire or wirelessly. The light receiving unit may have the same configuration as the light receiving unit 12, and is a light receiving unit for receiving light from the speed measurement device 30.

(11-28) The housing of the antenna unit including the light receiving unit in (11-27) or the separate housing including the light receiving unit may be provided with a security function of blinking a light emitter (e.g., an LED) while the vehicle is stopped (e.g., a dummy). The light emitter may be provided on the top surface of the housing, and the light receiving unit may be provided on the back side.

The "electrical connection" in (11-29) and (11-27) is preferably made by wire, and a relay unit having a separate housing is provided between the antenna unit and the display unit, and the relay unit has the function of supplying power to the electronic circuit in the housing having the light receiving unit and relaying the signal of the electronic circuit in the housing having the light receiving unit to the display unit.

(11-30) In a configuration that includes an antenna for the GPS receiving unit (i.e., a "GPS antenna"), an antenna for the microwave receiving unit, and an optical receiving unit, it is preferable that the GPS antenna be positioned at the top of these.

(11-31) In a configuration including a GPS antenna, a microwave receiving antenna, and a light receiving unit, it is preferable that the microwave receiving antenna and the light receiving unit are positioned forward of the GPS antenna in the direction of travel.

(11-32) In a configuration that includes an antenna and a light receiving unit for the microwave receiving unit, it is preferable that the two are arranged side by side in the left-right direction. In this case, it is preferable that they do not overlap in the up-down direction.

(11-33) In a configuration that includes an antenna of the microwave receiving unit and a light receiving unit, it is preferable that the light receiving unit is positioned above the antenna of the microwave receiving unit.

(11-34) The electronic circuit of the housing having the light receiving unit may be provided with a function for connecting to a drive recorder, and the drive recorder may be provided with a function for recording video when the light receiving unit receives light from the speed measuring device 30. The display unit may be provided with a function for playing back the recorded video when the light from the speed measuring device 30 is received. This video is, for example, video from a specified period of time that has already been recorded.

(11-35) It is preferable that the electronic device has a configuration in which light is received using a light guide tube such as an optical fiber or other light guide member. For example, there are cases in which the GPS antenna, the microwave receiving antenna, and the light receiving unit cannot be placed in ideal positions.

(11-36) Figure 70(a) is a diagram showing an example of such a configuration. In this example, inside the housing 1051, on the board 1052, the antenna 1053 of the microwave receiving unit is arranged on the front side in the traveling direction of the vehicle, and the light receiving unit 12 is arranged on the rear side of this. The GPS antenna 1054 is arranged in a position overlapping the light receiving unit 12 in the vertical direction. The light guiding member 1055 is arranged on one side as seen from the antenna 1053 in the traveling direction of the vehicle. Light incident on the end face of the light guiding member 1055 on the vehicle front side is guided to the end face on the opposite side. The light receiving unit 12 faces the end face on the opposite side. The light receiving unit 12 receives the light emitted from the end face on the opposite side. Note. The light guiding member 1055 only needs to be arranged so that light from the front side in the traveling direction of the vehicle can be incident thereon, and the arrangement of each member is not limited to the example described in Figure 70(a). Also, Figure 70(b) is a view of this electronic device seen from above. As shown in FIG. 70(b), the installation problem can be improved by arranging the light guide member 1055 so that it can rotate around the rear axis 1056.

In the above explanation, the components are arranged on the left side in consideration of the reception of light from the speed measuring device located on the left side. However, since light may be reflected from the median strip, etc., they may be arranged on the right side.

(11-36) The light receiving sensitivity of the light receiving section of the member functioning as a visible light cut filter, as exemplified by the lids 1003 and 803, changes depending on the surface condition. For example, the surface of the member may be textured (relatively rough), but it may also be smoother (shinier and less rough) (e.g., polished), in which case improved light receiving sensitivity can be expected. In the case of a textured surface, light is diffused on the surface. It is believed that this effect makes it easier to obtain sensitivity even if the light receiving direction is shifted horizontally. On the other hand, the inventors thought that if the surface is polished, the light will not be diffused when passing through the member functioning as the visible light cut filter, and more light will reach the light receiving section, resulting in increased sensitivity. Figure 71 is a diagram showing the difference between having and not having textured.

In the case of embossing, it is advisable to use a configuration that does not impair the design. For example, this is because there are cases where it is desirable for the inside of the housing not to be visible from the outside. If the periphery of the member functioning as the visible light cut filter is embossed or otherwise patterned, the member portion functioning as the visible light cut filter should also have a similar pattern. The color of this portion as seen from the outside should be similar to the color of the housing and should allow the light to be detected to pass through.

(11-37) The control unit 11 of the electronic device 10 may use a camera capable of capturing images in the infrared region to perform warning control when it detects an image corresponding to the light from the speed measuring device 30 within the captured area. The image corresponding to this light may be a flashing light (for example, an area with a small number of pixels (a range corresponding to a point)). The control unit 11 of the electronic device 10 may determine that the position of the image corresponding to this light in the captured image corresponds to the installation position of the speed measuring device. The control unit 11 of the electronic device 10 may identify an area directly above the roadway and to the side of the driving lane (side strip position) by image recognition and determine whether a flashing light is present in that position.

(11-38) Although it is possible to have a separate visible light cut filter that passes through the lens after the visible light cut filter, it is better to make the lens itself out of a material that cuts visible light, and not provide a separate visible light cut filter on the surface of the housing.

(11-39) It is preferable that an adjustment means is provided that can adjust the orientation of the part where the incident part is provided (the protruding part described above). The adjustment means can change the orientation of the part where the incident part is provided when a force from a human hand is applied, and can be configured so that the orientation of the part where the incident part is provided does not change when a force from a human hand is not applied. The adjustment means can be changed up, down, left, and right, but it is preferable that the orientation can be adjusted at least in the left and right directions. In particular, a display unit is provided on the front side of the housing, and the adjustment means and the incident part are provided on the back side of the housing, which has excellent effects. In particular, when installed on the right side of the dashboard in front of the driver's seat, the display screen of the display unit is oriented so that the left side is forward so that it is easy to see. In this case, the light receiving unit faces the right front, making it difficult to receive light from the speed measuring device 30, which is often emitted from the left front of the roadside strip, etc., but by doing this, the light receiving unit can be oriented in that direction, in the direction of light from the speed measuring device 30, which is often emitted from the left front of the roadside strip, etc.

(11-40) It is preferable to have a function of transmitting information about the location where surveillance activities were conducted by the speed measurement device 30 to a server or another vehicle based on instructions from a user or based on reception of light from the speed measurement device 30. At this time, it is preferable to have a function of transmitting surveillance type information indicating that the location was a location where surveillance activities were conducted using light from the speed measurement device 30 in addition to information about the location (for example, current location information from GPS).

It is also preferable to have a function of transmitting information that can distinguish whether the posting of the location where the speed measuring device 30 was monitoring activity by the user or the automatic posting due to the reception of light from the speed measuring device 30 is made. It is also preferable to have a function of receiving information on the location where the speed measuring device 30 was monitoring activity posted to the server, and a function of notifying the user that the location where the posted monitoring activity by the speed measuring device 30 was performed when the user's vehicle approaches the received location. At this time, it is preferable to receive information that can distinguish whether the posting of the location where the speed measuring device 30 was monitoring activity by the user or the automatic posting due to the reception of light from the speed measuring device 30 is made, and to notify the user that the posting of the location where the speed measuring device 30 was monitoring activity by the user or the automatic posting due to the reception of light from the speed measuring device 30 is made. It is preferable to consider the "approach of the vehicle to the received location" as approaching at a distance longer than the detectable distance of the laser light. For example, if the detectable distance of normal laser light is 500 m, it is preferable to determine the approach of the vehicle to the received location as 800 m.

For example, it is preferable to have a function of issuing a notification to inquire of the user whether or not surveillance activity by the speed measuring device 30 was being conducted after passing a location where surveillance activity by the posted speed measuring device 30 was being conducted, detecting the user's voice or manual operation in response to this, and transmitting information to the server as to whether or not surveillance activity by the speed measuring device 30 was being conducted at the location where surveillance activity by the posted laser speed measuring device was being conducted. It is preferable to have a function of acquiring this information from the server, and adding information as to whether or not surveillance activity by the speed measuring device 30 was being conducted for anything approaching that location, or of not issuing a notification altogether.

In addition to or in addition to sending the information to a server (e.g., sending the information to a server connected to the Internet via a wireless LAN and an LTE wireless LAN router), the information may be broadcast via radio waves to the surrounding area, or the information may be communicated with other radar detectors in the vicinity. The information may also be transmitted by relaying it between radar detectors in each vehicle using P2P or the like.

Regarding (11-41) and (11-40), the idea of automatically posting and sharing data on the location of receiving light from the speed measuring device 30 or the location of receiving radar-type radio waves is considered to be a function that cannot be fully utilized unless there is accurate registration of reception without misrecognition and a large number of users who utilize the network. Therefore, the following configuration may be used under the idea that if a system for posting to an SNS (Social Network System) is used and many users can see the data, it may result in an appeal of the electronic device 10 or its provider (company), which may lead to purchasing power. The SNS may be, for example, Twitter (registered trademark), Instagram (registered trademark), or other SNS.

When the control unit 11 of the electronic device 10 starts receiving pulsed light corresponding to the optical method or radio waves corresponding to the radar method, it acquires an image captured by an in-vehicle camera (e.g., the in-vehicle camera 50) and starts image recognition processing of the acquired captured image. This image recognition processing is processing to recognize the image of the speed measurement device contained in the captured image. The algorithm of the image recognition processing may be performed using a known image recognition processing. For example, image data showing the images of the optical method and the radar method speed measurement device are stored in advance in the storage unit 18. The control unit 11 uses this image data to perform image recognition processing, for example, by a pattern patching method. Here, the control unit 11 may narrow down the image data used for the image recognition processing according to the form of receiving the pulsed light or the form of receiving the radio waves. For example, when the control unit 11 receives pulsed light, it may narrow down to the image data of the optical method speed measurement device stored in the storage unit 18, and when the control unit 11 receives radio waves, it may narrow down to the image data of the radar method speed measurement device stored in the storage unit 18. The control unit 11 compares the image captured by the in-vehicle camera 50 with the image represented by the narrowed-down image data, and determines whether a speed measuring device has been captured based on a value indicating the degree of similarity (here, a score value). For example, the score value indicating the degree of similarity is larger as the degree of similarity is higher. The score value is calculated by a known algorithm. For example, when the score value is equal to or greater than a threshold, the control unit 11 determines that a speed measuring device is present and performs a posting process. For example, when the score value is less than a threshold, the control unit 11 determines that a speed measuring device is not present and does not perform a posting process. Note that, if the vehicle is not equipped with a camera for image recognition such as the in-vehicle camera 50, the control unit 11 determines whether there is any related public enforcement information or enforcement PoI (Point of Interest, i.e., enforcement location) when reception of pulsed light or radio waves begins. If the control unit 11 determines that there is any of these, it performs a posting process, and if it determines that there is no such information, it does not perform a posting process.

The control unit 11 performs a posting process to post information such as location information indicating the location of the speed measuring device to the server via the communication unit 17. The control unit 11 generates data in a predetermined format such as CSV (Comma-Separated Values), including, for example, latitude and longitude as location information indicating the location of the speed measuring device, date and time, the type of electronic device 10 (for example, manufacturer name, model or model number), the name of the road on which the device is traveling, the address of the current location, and a comment for SNS, and uploads the data to the server. The comment for SNS is, for example, a compilation of the date and time, the type of electronic device 10, the name of the road on which the device is traveling, the address of the current location, and the like. The server may store the data, for example, sorted by date and time, in order to make the data sent from the electronic device 10 easier to handle. The server automatically posts the data to the SNS. The server may perform the posting process while devising a number of responses to the posted content (the number of so-called "likes") in order to gain followers. The caption and comment are comments for SNS.

The control unit 11 of the electronic device 10 periodically monitors the server, and if the latest data has been updated, downloads the posted data and displays it on the map or as a caption. This display can be set to on/off, and only the latest information can be displayed for those who want to see it. Here, for example, the display outputs "This is Wakkanai City, Hokkaido, but an icon and caption are displayed on the map: Portable speed cameras are being inspected on National Route 238!".

(11-42) Regarding the configuration of (11-41), the control unit 11 may continue to perform control to notify the presence of the speed measurement device 30 when the reception of the pulsed light is interrupted after the reception of the pulsed light or when a vehicle ahead is recognized from an image of the in-vehicle camera 50. In this way, the presence of the speed measurement device 30 can be notified even if the pulsed light from the speed measurement device 30 is blocked by the vehicle ahead.

(11-43) Regarding the configuration of (11-41), when the intensity of the received pulsed light suddenly becomes undetectable from a state where it is higher than a predetermined level (for example, when the vehicle passes the location of the speed measuring device), the control unit 11 may upload to the server, together with the location information, an image (for example, a photo) taken just before the detection ceases (for example, just before passing the location of the speed measuring device). In this way, the server side can determine whether the image is a false alarm or a real alarm by looking at the image. It is even better to upload the image taken by the rear camera to the server after the detection ceases (for example, after passing). The control unit 11 may cause another vehicle device (electronic device 10 or on-board camera) to take an image of the location of the speed measuring device and automatically upload it. In this case, the electronic device 10 may distribute information on the location of the speed measuring device to models that do not have a function for receiving pulsed light, and have them take an image and upload it. Image information such as the time to stop enforcement can be collected from many existing electronic devices. In this case, models that have a function for receiving pulsed light may also upload the laser reception level.

(11-44) The control unit 11 may post on SNS "Thank goodness for having XX radar" (XX being the name of the manufacturer) by including the logo or text of the manufacturer of the electronic device 10 in the image (11-43) or in the description. The type of electronic device 10 (e.g., model number) may also be included here. The control unit 11 may also include the vehicle speed at that time (e.g., only if it is below the speed limit). The control unit 11 may also include the speed limit of the road. The control unit 11 may also include facility information in the vicinity. For example, the control unit 11 posts "I passed a laser speed camera near △△, which has a speed limit of 60 km, at 55 km/h. Thank goodness for having XX radar." The image may be a screenshot of the screen of the electronic device 10 itself. In particular, it may be a display screen itself in which an image related to the notification of the electronic device 10 is superimposed on an image captured by a drive recorder. In this case, it is advisable to use an image that mimics the outer frame of the radar screen (where the model name and function names are written) on the outside of the display screen (i.e., an image of the display area of the housing part when the electronic device 10 is viewed from the front).

(11-45) The electronic device 10 may upload the location where the notification by the cancel function corresponding to the radar system was canceled to the server via the network and share it. In this way, it is possible to prevent false notifications from being made from the start even for automatic doors, etc., near roads where other users are driving for the first time.

(11-46) Radar detectors may react to vending machines. Therefore, when the electronic device receives a specific radio wave (radar wave) while parked, it displays a message saying "Is there a vending machine nearby?" along with buttons saying "Yes" and "No" and accepts posts. The electronic device sends the posted data to a server. The server may tally up the posted data and distribute it as vending machine points, etc., indicating that it is a source of false alarms.

(11-47) By connecting the electronic device 10 to a drive recorder that supports intercommunication, it is possible to supply power to the drive recorder, and to communicate video/audio signals, operation signals, GPS information, and OBDII information. Furthermore, it is equipped with a linkage mode that automatically switches to an external input display when approaching a speed measurement device. When approaching a speed measurement device, the position of the speed measurement device's camera (for example, three fixed patterns: up/left/right) is highlighted in red to notify the user. The speed warning point warning alerts users to points where the maximum speed changes, indicating a high possibility of enforcement. In addition, it is equipped with a normal image/mirror image switching function, and the drive recorder can also be used as a backup camera.

12. Other embodiments
Regarding the configuration in which the above-mentioned lenses or mirrors are combined to widen the light receiving angle of the light receiving element, for example, the following configuration is adopted. Fig. 72 is a diagram showing the configuration of the electronic device 10A of this embodiment as viewed from the upper right diagonal direction on the rear side. Fig. 73 is a six-sided view showing an example of the external configuration of the electronic device 10A of this embodiment. Fig. 73 shows a front view, a top view, a right side view, a bottom view, a left side view, and a back view of the electronic device 10A. Hereinafter, the same elements as those described in [7. Mechanism of the electronic device 10] are represented by the same reference numerals as those used in [7. Mechanism of the electronic device 10], and the description will be omitted as appropriate.

The housing 100A of the electronic device 10A is divided into a first housing 1001 located on the front side and a second housing 1002A located on the rear side. The display unit 13, the light emitting unit 23, and the illuminance sensor 201 of the sensor unit 20 are provided on the front side of the first housing 1001. The display area of the display unit 13 is located in the opening on the front side of the first housing 1001. A speaker 14 is provided to output sound from the upper end surface of the second housing 1002A. The right end surface of the housing 100A is provided with an attachment unit 21 (i.e., an SD card slot) for attaching an SD card. A condensing lens 300 is provided in the upper right part of the back of the housing 100A. The power switch 221 and DC jack 222 of the power supply unit 22 are provided in the lower left part of the back of the housing 100A.

A lens holder 1006 is provided on the rear surface of the second housing 1002A. The lens holder 1006 constitutes a window, which is an opening that allows communication between the inside and outside of the housing 100A. When viewed from the rear surface side of the housing 100A, the lens holder 1006 has an elliptical shape with a major axis in the horizontal direction and a minor axis in the vertical direction. When the electronic device 10A is installed in a vehicle, the horizontal direction corresponds to the width direction of the vehicle, and the vertical direction corresponds to the height direction of the vehicle.

The condensing lens 300 is fitted into the lens holder 1006. The condensing lens 300 is a part of the light receiving unit 400, and is provided at a position corresponding to the light entrance portion described in the above-mentioned embodiment. The lens holder 1006 and the condensing lens 300 are provided at a position toward the upper right of the second housing 1002A when viewed from the back of the second housing 1002A. For example, the condensing lens 300 is arranged so as to be located at least above the center in the vertical direction on the back of the housing 100A, and at least on the left side of the vehicle's traveling direction when viewed from the driver's seat side of the vehicle. This is because it is possible that the condensing lens 30 is more likely to receive light from the speed measurement device 30 if it is located relatively higher on the back of the second housing 1002A and is located on the shoulder side where the speed measurement device 30 is likely to be located. The pulsed light Lout from the speed measurement device 30 is introduced into the inside of the housing 100A through the lens holder 1006 and the condensing lens 300. The entire focusing lens 300 is formed using a material that transmits light. The focusing lens 300 is transparent or translucent. The light incidence surface of the focusing lens 300 is aspheric, and protrudes further rearward than the rear surface of the housing 100A. The focusing lens 300 is an aspheric lens, and its configuration will be described in detail later. The focusing lens 300 is a lens that transmits at least the pulsed light Lout, and is a translucent or transparent material. This may contribute to the appeal of the design of the electronic device 10A.

Figure 74 is a diagram showing the electronic device 10A with the second housing 1002A removed. Figure 75 is a diagram showing the electronic device 10A with the focusing lens 300 further removed. Figure 76 is a diagram showing the electronic device 10A with the filter 250 and shield plate 270 further removed.

The condenser lens 300 is provided at a position overlapping the first region Ar3 of the second substrate 1030. The condenser lens 300 is designed and manufactured to condense the pulsed light Lout at a predetermined focal distance position. The light receiving element 410 receives the light condensed by the condenser lens 300. The light receiving element 410 is provided on the surface side of the second substrate 1030 facing one surface on the condenser lens 300 side, on the side where the first substrate 1010 is arranged in this embodiment. Therefore, the light receiving element 410 receives light that has passed through the light transmitting portion 1033 provided on the second substrate 1030. The light transmitting portion 1033 is a rectangular parallelepiped opening here. The light receiving element 410 may be the same element as the first light receiving element 122 or the second light receiving element 124, but differs from the above-mentioned embodiment in that there is only one light receiving element.

The filter 250 is an example of a wavelength selection section corresponding to the first wavelength selection section 121. The filter 250 is provided between the light receiving element 410 and the condenser lens 300, and selects and transmits light of a specific wavelength λout from the incident light. The filter 250 may be of any configuration and may be removed. The shield plate 270 is a shield made of, for example, aluminum or a conductive material, and is provided in an area surrounding three of the four sides of the transparent section 1011. The shield plate 270 is intended to suppress the effects of static electricity and the like on the light receiving element 410 and other electronic components.

Figure 77 is a diagram of Figure 76 with the second substrate 1030 removed. The light receiving element 410 is housed in a shield case 280. The shield case 280 is provided on the surface of the first substrate 1010 that faces the one surface on the condenser lens 300 side, and covers the entire light receiving element 410. Such a shield case 280 performs the same function as the shield case 1031.

In this way, the light receiving element 410 is disposed on the surface of the second substrate 1030 that faces the front of the electronic device 10A. This allows for more reliable shielding using a simple method, and since the first substrate 1010 is present between the light receiving element 410 and the focusing lens 300, the space equivalent to the focal length can be effectively utilized. As a result, this also contributes to making the housing 100 more compact overall. Note that the same effect can be expected by disposing the light receiving element 410 on the front or rear surface of the first substrate 1010 in the electronic device 10A.

Figure 78 is a six-sided view showing an example of the configuration of the focusing lens 300. The focusing lens 300 is an aspherical lens that focuses the reflected light from the speed measurement device 30 and forms an image at a predetermined focusing position. The focusing lens 300 is an aspherical lens with an aspherical light incidence surface. The focusing lens 300 includes an incidence surface 310 and an emission surface 320. The incidence surface 310 includes an aspherical curved surface 311 into which the pulsed light from the speed measurement device 30 is incident. The incidence surface 310 includes a curved surface 311 that is convex along the width direction of the vehicle. The curved surface 311 protrudes most at the center in the width direction of the vehicle. The curved surface 311 also protrudes most at the center in the height direction of the vehicle. The curved surface 311 is, for example, parabolic in shape, but may be any other shape as long as it is a surface consisting of a smooth curve.

The length La of the curved surface 311 in the width direction of the vehicle is greater than the length Lb in the height direction. The curvature of the curve of the focusing lens 300 in the width direction of the vehicle is smaller than the curvature of the curve in the height direction of the vehicle. In this way, the focusing lens 300 curves more gently in the width direction of the vehicle than in the height direction of the vehicle.

The exit surface 312 is a surface from which light incident on the entrance surface 310 (particularly the curved surface 311) exits. The exit surface 312 is a flat surface. However, the exit surface 312 may be curved.

The focusing lens 300 guides the pulsed light from the speed measuring device 30 to the position of the light receiving element 410. The position of the focusing lens 300 is set so that the light is focused at the position of the light receiving element 410 according to the characteristics of the focusing lens 300.

A flat surface 313 is provided around the curved surface 311 of the incident surface 310. Legs 314A and 314B are provided on a pair of opposing sides of the flat surface 313. The legs 314A and 314B are fixed to the first substrate 1010. Note that the flat surface 313 and the legs 314A and 314B are not essential components.

Since the focusing lens 300 in the above configuration is an aspheric lens, spherical aberration can be suppressed when forming an image on the light receiving element 410, compared to when a spherical lens is used. The spot size obtained with an aspheric lens can be several orders of magnitude smaller than that of a spherical lens. Based on this concept, it is considered that the focusing lens may be realized by combining multiple lenses that have smaller spherical aberration than a spherical lens.

When the speed measuring device 30 is located on the road shoulder, if the distance between the speed measuring device 30 and the vehicle is large, the pulsed light Lout is incident from almost the front side, but as the speed measuring device 30 approaches, the pulsed light Lout is incident from the left side. For this reason, the horizontal length La of the focusing lens 300 is made larger than Lb so that the light can be received at a wider acceptance angle in the width direction of the vehicle than in the height direction of the vehicle. For example, the focusing lens 300 is designed to be able to focus light incident at an incidence angle of 40 degrees on both sides in the width direction and 20 degrees on both sides in the height direction. By relatively shortening the height direction length Lb of the curved surface 311, the concentration of light other than the pulsed light Lout is reduced. If the purpose is to receive a wide range of incidence angles in the width direction of the vehicle, the curved surface 311 may be flat along the height direction of the vehicle.

Rather than placing the light receiving element 410 at the focal length of the focusing lens 300, it is better to place the light receiving element 410 at a position shorter than the focal length. Because the focusing lens 300 has a small curvature and bends light significantly, light around the focusing lens 300 tends to gather near the center of the optical axis in front of the focal length. By placing the light receiving element 410 in front of the focal length, more light can be collected. Also, light coming from a direction with a steep angle passes near the center of the optical axis in front of the focal length position. By placing the light receiving element 410 in front, light with a wide angle of incidence can be received.

The focusing lens 300 has a characteristic that allows it to detect the pulsed light from the speed measuring device 30 even if it is weak. This allows the electronic device 10 to detect the presence of the speed measuring device 30 over an extremely wide range and long distances, and to quickly report its presence. As in the above-mentioned embodiment, a visible light cut filter may be provided on the incident surface side of the focusing lens 300, or the focusing lens 300 may be formed of a material that has a visible light cut function. This reduces the influence of visible light. The focusing lens 300 may be what is called an aspheric lens.

The focusing lens 300 may be positioned so that its optical axis is parallel to the fore-aft direction of the vehicle, but may also be tilted. In this case, if the optical axis of the focusing lens 300 is tilted to the left front side with respect to the fore-aft direction of the vehicle, it may be easier to receive the pulsed light Lout from the speed measurement device 30.

The inventors conducted an experiment to confirm that an aspherical lens can receive light with a wide angle of incidence. As shown in Figure 79 (a), a commercially available semi-round bar of transparent acrylic (radius 6.35 mm) was scraped down to a thickness of 3 mm and polished. A photodiode (PD) was used as the light receiving element. The focal length was 3 mm at back focus, and the lens was positioned 1 mm above the light receiving element to ensure a wide angle of view on the upper side. Figure 79 (b) is a table showing the relationship between the light source direction [deg] and the ATT value [db] in this case. This confirmed that the curved horizontal acceptance angle was greater than the vertical acceptance angle.

Figure 80 is a diagram showing an example of the electrical configuration of the light receiving unit 400. The light receiving element 410 is a photodiode here. The cathode of the light receiving element 410 is connected to the high potential power line, and the anode of the light receiving element 410 is connected to one end of the resistor R3. The other end of the resistor R3 is grounded. The input end of the amplifier AMP1 is commonly connected to the anode of the light receiving element 410 and one end of the resistor R3. A plurality of amplifiers AMP2, ... AMPPN are connected in series to the rear stage of the amplifier AMP1. The value of N is arbitrary. However, it is desirable that the amplifiers AMP1 to AMPPN are designed to amplify a signal in the wavelength region of a specific wavelength λout. The output end of AMPPN is connected to one input terminal (here, the positive input terminal) of the differential amplifier 430, and a signal SIGN is input. A threshold level Thn is input to the other input terminal (here, the negative input terminal) of the differential amplifier 430. The differential amplifier 430 functions as a comparator that outputs a signal according to the difference between the signal SIGN and a threshold level Thn. The differential amplifier 430 outputs a signal with a positive potential when the signal SIGN exceeds the threshold level Thn, and outputs a signal with a negative potential when the signal SIGN is equal to or lower than the threshold level Thn. The control unit 11 detects the presence of the speed measurement device 30 based on the difference between the signal SIGN and the threshold level Thn.

The control unit 11 may detect the presence of the speed measuring device 30 in the same manner as in the above-mentioned embodiment. For example, when the wavelength of the pulsed light is 905 nm, the control unit 11 may control to notify the presence of the speed measuring device 30 when a pulsed light with a pulse interval of 80 ms (or a range of less than 80 ms or more than 80 ms within a certain range from the reference pulse interval) is received. Alternatively, the control unit 11 may control to notify the presence of the speed measuring device 30 when a pulsed light with a pulse width (light emission time) of 20 ms (or a range of less than 20 ms or more than 20 ms within a certain range from the reference pulse width) is received. The control unit 11 may notify the presence of the speed measuring device 30 when a pulsed light of a specific wavelength λout is received at least once. In this way, when there is a possibility that the speed measuring device 30 exists, its existence can be promptly notified to the user, so that the user can be aware of it.

[13. Modifications of [12. Other embodiments]]
(13-1) As shown in FIG. 81, the electronic device 10A may have a reflecting unit 500. The reflecting unit 500 is provided at a position different from the optical path from the condenser lens 300 to the light receiving element 410. The reflecting unit 500 includes a reflecting surface that reflects at least a part of the light emitted from the condenser lens 300 toward the light receiving element 410. The reflecting unit 500 has a portion that surrounds the optical path, and is preferably formed in a cylindrical shape that surrounds the optical path over its entire circumference so as to increase the reflectivity. The diameter of the reflecting unit 500 becomes smaller as it approaches the light receiving element 410. In this way, the amount of light received by the light receiving element 410 from the speed measuring device 30 increases, so that the presence of the speed measuring device 30 can be more reliably notified.

For example, the reflector 500 may be arranged such that a mirror-reflecting sheet is placed on the substrate surface side, bent vertically into a semi-cylindrical shape with the light-receiving element 410 facing inward. For example, the space between the incident portion and the light-receiving element 410 may be formed into a cylinder, with the inside of the cylinder being a mirror surface (or scattering surface).

(13-2) As shown in FIG. 82, the electronic device 10A may have a reflecting section 600. The reflecting section 600 is provided on the optical path from the condensing lens 300 to the light receiving element 410. The reflecting section 600 reflects at least a part of the light emitted from the exit surface 320 in the direction of the light receiving element 410 by utilizing total reflection of the light. The reflecting section 600 may be, for example, a medium in the shape of a column, a square column, a cone, or a pyramid provided between the condensing lens 300 and the light receiving element 410, and may be, for example, an infrared-transmitting resin, glass, optical fiber, or other member having a function of reflecting light. The reflecting section 600 may be made of a material that transmits light of a specific wavelength. The reflecting section 600 may be realized by utilizing total reflection at or above the critical angle. For total reflection at the critical angle, the shape of the side of the reflecting section 500 may be flat, but may be made to be non-flat, such as jagged. It is also possible to direct the light going out from the condensing lens 300 inward. In this way, the amount of light received by the light receiving element 410 from the speed measurement device 30 increases, making it possible to more reliably notify the presence of the speed measurement device 30.

(13-3) The vertical center position of the condenser lens 300 may be shifted upward from the light receiving element 410. This is to ensure that the light is properly incident on the light receiving element 410 even when the main unit screen is tilted so that the top of the screen is positioned further back, making it easier to see.

This configuration is related to the "wider upper angle of view" described in Figure 79. In short, the sensitivity to pulsed light is higher from above in the vertical direction than from below. If such a configuration is adopted in electronic device 10A, and display unit 13 (main body screen) is installed facing diagonally upward so that it can be easily seen from the driver's vehicle, the upper part with good sensitivity (i.e. the part above the center in the vertical direction) will be closer to horizontal, making it easier to receive pulsed light Lout.

(13-4) As shown in FIG. 83, a collision warning system 700 that emits light toward the windshield 42 of a vehicle may be provided. The collision warning system 700 is disposed, for example, on the windshield 42 or its periphery. The collision warning system 700 emits light L1 of a predetermined wavelength toward the front of the vehicle and receives the reflected light to detect the presence of an object ahead (e.g., another vehicle or a building such as a wall) and the distance to the object, and notifies the user. When the collision warning system 700 is activated, disturbance light L2 including a reflected wave from the object ahead or the windshield may be received by the electronic device 10A. In this case, depending on the wavelength of the disturbance light L2, the light of the collision warning system 700 may be mistaken for pulsed light Lout.

Figure 84 is a graph showing an example of the change over time in the level of light received by the light receiving unit 400. In Figure 84, a case is shown in which a vehicle is approaching the speed measuring device 30 and the level of the pulsed light Lout is gradually increasing. The level of the disturbance light L2 indicates the level of light caused by the collision warning system 700. In this example, when the threshold level Thn is set to Th1, the level of the disturbance light L2 is below the threshold level Th1 and the level of the pulsed light Lout is above it, so there is no problem in detecting the pulsed light Lout. However, when the threshold level Thn is set to Th2, both the level of the disturbance light L2 and the level of the pulsed light Lout exceed the threshold level Th2. In this case, even if an attempt is made to detect the speed measuring device 30 based on the pulse interval, it will not be possible to detect it. It is sufficient to set the threshold level Thn optimally, but since the light level of the collision warning system 700 differs depending on the vehicle model and type, it may be difficult to set it. Therefore, the control unit 11 performs control to notify the presence of the speed measurement device 30 when the level of the received light of a specific wavelength is equal to or higher than a threshold level, and also performs control to change the threshold level.

Figure 85 is a diagram showing an example of the electrical configuration of the light receiving unit 400. In this example, the circuit configuration between the control unit 11 and the differential amplifier 430 is different from that of Figure 80. One end of each of the resistors R41, R42, and R43 is connected to each of the three terminals of the control unit 11. The other ends of the resistors R41, R42, and R43 are connected to the power supply line Vcc that applies a fixed voltage via a resistor R44. The control unit 11 selectively outputs a 1-bit signal indicating either "0" (low level) or "1" (high level) from the three terminals to which the resistors R41, R42, and R43 are respectively connected. The threshold level Thi changes depending on this signal level. Here, the threshold level Thi is adjusted by a 3-bit signal, so there are eight possible levels for the threshold level Thi. The level of the threshold level Thi changes depending on this signal level. Here, the threshold level Thi is the minimum in the case of "000", and the threshold level Th1 increases in the order of "001", "010", ..., and "111". The order of increasing is Th2, ..., Th8.

During a predetermined period such as when the vehicle is running or the engine is on, the control unit 11 increases the threshold level in order from Th1. Here, in the example of FIG. 86, the control unit 11 judges that disturbance light exists because disturbance light L2 is repeatedly received at a high cycle. In this case, the control unit 11 raises the threshold level to Th2. Here, since the control unit 11 repeatedly receives disturbance light L2 at a high cycle, the threshold level Th2 is not optimized. In this case, the control unit 11 judges that disturbance light exists and raises the threshold level to Th3. Then, the control unit 11 judges whether disturbance light L2 is repeatedly received at a high cycle. In this case, since the control unit 11 does not repeatedly receive disturbance light L2 at a high cycle, the threshold level is optimized. If the threshold level is raised to Th3 but disturbance light L2 is repeatedly received at a high cycle, the control unit 11 raises the threshold level to Th4. The subsequent control is the same.

When the control unit 11 sets the threshold level, it performs this adjustment at a predetermined timing. This timing is, for example, at every predetermined interval. At the adjustment timing, the control unit 11 lowers the set threshold level Thi by one step to Thi-1. Then, when the control unit 11 repeatedly receives disturbance light L2 at a high cycle, it raises the threshold level Thi-1 by one step and resets it to the threshold level Thi. If the control unit 11 does not repeatedly receive disturbance light L2 at a high cycle, it further lowers it by one step to Thi-2. If the control unit 11 repeatedly receives disturbance light L2 at a high cycle, it raises the threshold level Thi-2 by one step and returns it to Thi-1 and sets it to this threshold level. If the control unit 11 does not repeatedly receive disturbance light L2 at a high cycle, it further lowers the threshold level to Th-3. The subsequent controls are similar. In this way, the threshold level can be optimized at all times. In addition, since the circuit contains noise due to amplifier input noise, etc., it is preferable to set resistors R41 to R44 so that threshold level Th1 exceeds the level of this noise NS. Furthermore, threshold levels Th1 to Th8 do not need to be spaced at equal intervals, and the intervals may be larger as the levels are higher, or may be smaller near the lower and upper limits and larger near the middle. Furthermore, the number of threshold level steps (number of resistors) is not limited to this, and may be less than eight steps or more than eight steps. Furthermore, other configurations may be used to make threshold level Thi variable.

Figure 87 is a diagram showing an example of a modified electrical configuration of the light receiving unit 400. As described above, when the control unit 11 varies the threshold, a period in which light is repeatedly received at a high frequency occurs at a certain frequency, and at this time, the reception of the pulsed light Lout cannot be properly determined. Therefore, as shown in Figure 87, a signal SIGN may be input to one input terminal (here, the positive input terminal) of the differential amplifier 440 and a threshold level Thi+1 may be input to the other input terminal (here, the negative input terminal) of the differential amplifier 430 at the output end of the amplifier AMPN and the input terminal of the differential amplifier 430. The method of defining the threshold level Thi+1 may be the same as the method of defining the threshold level Thi. The output terminal of the differential amplifier 440 is connected to the control unit 11. The control unit 11 sets the threshold level so that the level from the differential amplifier 440 is high and the level from the differential amplifier 430 is low, and does not change the threshold level during this period. Then, the control unit 11 raises the threshold level when both are low level, and lowers the threshold level when both are high level. It is possible to deal with light from other devices and other disturbance light, not limited to the collision warning system 700. Disturbance light that can be dealt with includes infrared rays from a remote controller, laser light from road surveying equipment, laser light from automatic braking from other vehicles, and sunlight. For example, a filter provided in the light receiving unit prevents infrared rays from a remote controller and laser light from road surveying equipment from being mistaken for pulsed light from a speed measuring device, and the function of the control unit prevents laser light from automatic braking from other vehicles and sunlight from being mistaken for pulsed light from a speed measuring device.

[14. Other Examples of Electronic Devices]
Fig. 88 is a diagram showing the external configuration of electronic device 80A in which the configuration described in [12. Other embodiments] is adopted for electronic device 80 described in Fig. 62. Figs. 89 and 90 are six-sided views showing an example of the external configuration of electronic device 80A. Fig. 89 shows a front view, a top view, a right side view, a bottom view, and a left side view of electronic device 80A. Fig. 90 shows a rear view of electronic device 80A. A condenser lens 300 is provided on the rear side of electronic device 80A.

91, 92, and 93 are diagrams showing the internal configuration of the electronic device 80A. The electronic device 80A is different from the electronic device 80 in that the light receiving element 843 is formed on the fourth substrate 840 so as to receive pulsed light. The light receiving element 843 may have the same configuration as the light receiving element 410. The light receiving element 843 is provided on the surface side of the fourth substrate 840 that faces one surface on the condenser lens 300 side. Therefore, the light receiving element 843 receives light that has passed through the light transmitting portion 842 provided on the fourth substrate 840. The light transmitting portion 842 is a rectangular parallelepiped opening here. The filter 870 performs the same function as the filter 250. The shield plate 880 performs the same function as the shield plate 270. The light receiving element 843 is housed in the shield case 890. The shield case 890 performs the same function as the shield case 280. The electronic device 80A can also achieve the same effect as the electronic device 10A.

15. Other embodiments
Regarding a configuration in which a lens or a mirror is combined to widen the light receiving angle of the light receiving element, for example, an electronic device having the following configuration may be provided. FIG. 94 is a diagram showing the external configuration of the electronic device 900 of this embodiment. FIG. 94(a) is a diagram showing the electronic device 900 viewed from the diagonally upper right direction on the front side of the electronic device 900. FIG. 94(b) is a diagram showing the electronic device 900 viewed from the diagonally upper right direction on the rear side of the electronic device 900. FIG. 95 is a six-sided diagram showing an example of the external configuration of the electronic device 900. FIG. 95 shows a front view, a top view, a right side view, a bottom view, a left side view, and a rear view of the electronic device 900.

The electronic device 900 has a rectangular parallelepiped appearance that is longer in the width direction than in the vertical direction. The dimensions and weight of the electronic device 900 allow the user to easily carry it around. For example, the electronic device 900 has a width (horizontal length) of 48 mm, a height (vertical length) of 34 mm, a depth of 13 mm, and a weight of 16 g. The housing 900A of the electronic device 900 is divided into a first housing 901 located on the front side and a second housing 902 located on the rear side. A light-emitting unit 911, an operation unit 912, and a sound-emitting unit 913A are provided on the front side of the first housing 901.

The light-emitting unit 911 emits a predetermined light. The light-emitting unit 911 includes, for example, a light-emitting diode. The light-emitting unit 911 emits light according to the operating state of the electronic device 900. The light-emitting unit 911 is provided at a position toward the lower right of the first housing 901 when viewed from the front side. The light-emitting unit 911 emits white light when the electronic device 900 is in a standby state. The light-emitting unit 911 emits blue light when the electronic device 900 is in operation. The light-emitting unit 911 emits red flashing light when the electronic device 900 receives the pulsed light Lout. Note that the relationship between the operating state and the light-emitting state is not limited to this, and various modifications are possible for the light-emitting mode, such as the light-emitting color and light-emitting timing (for example, the frequency and number of flashes).

The operation unit 912 accepts user operations. The operation unit 912 is provided in a position toward the lower right of the first housing 901 when viewed from the front side, and is located to the right of the light-emitting unit 911. Here, the operation unit 912 functions as a volume button. The operation unit 912 is operated by the user, for example, when adjusting the volume of an alarm sound or other sounds, or when muting an alarm sound that is emitted when the pulsed light Lout is received. Here, the operation unit 912 accepts a press operation, but may be an operation unit that accepts a slide, touch, or other operation.

The sound emitting unit 913A emits a predetermined sound. The sound emitting unit 913A has multiple holes provided in a position toward the upper right of the first housing 901 when viewed from the front. The sound emitting unit 913A outputs sound through these multiple holes. The sound emitting unit 913A outputs an alarm sound or other sounds.

A DC jack 914 that receives power input from a power source is provided on the left side of the housing 900A. For example, a cigarette plug cord or a power cable is connected to the DC jack 914. A mounting portion 917 for mounting the first mounting member 940 and the second mounting member 950 described later is provided on the back of the second housing 902. In this way, the mounting portion 917 is a mounting portion shared by the first mounting member 940 and the second mounting member 950. The mounting portion 917 is provided near the center in the width direction of the second housing 902 when viewed from the back side, near the lower end of the second housing 902. The mounting portion 917 has a pair of grooves 9171, 9172. The pair of grooves 9171, 9172 are provided at a predetermined interval in the width direction of the electronic device 900, and each extends in the vertical direction. The pair of grooves 9171, 9172 can be attached and detached to the first mounting member 940 and the second mounting member 950 described later. The first mounting member 940 and the second mounting member 950 may be further fixed to the second housing 902 using fasteners such as screws.

A lens holder 915 is provided on the rear surface of the second housing 902. The lens holder 915 constitutes a window, which is an opening that allows communication between the inside and outside of the housing 900A. The lens holder 915 may have the same shape as the lens holder 1006 described above, and is an elliptical shape with a major axis in the width direction and a minor axis in the up-down direction when viewed from the rear surface of the housing 900A. When the electronic device 900 is installed in a vehicle, the width direction corresponds to the width direction of the vehicle, and the up-down direction corresponds to the height direction of the vehicle. The second housing 902 is screwed to the first housing 901 using screws 918 and 919 at both ends in the width direction when viewed from the rear surface.

The condensing lens 920 is fitted into the lens holder 915. The condensing lens 920 is a part of the light receiving unit 920A in the electronic device 900, and is provided at a position corresponding to the light entrance unit. The condensing lens 920 may have the same configuration as the condensing lens 300. The lens holder 915 and the condensing lens 920 are provided at a position toward the upper right of the second housing 902 when viewed from the back side of the second housing 902. For example, the condensing lens 920 is arranged so that it is located at least above the center in the vertical direction on the back side of the housing 900A, and at least on the left side of the vehicle's traveling direction when viewed from the driver's seat side of the vehicle. This is because it is possible that the condensing lens 920 is more likely to receive light from the speed measurement device 30 if it is located relatively high on the back side of the second housing 902 and is located on the shoulder side where the speed measurement device 30 is likely to be located. The pulsed light Lout from the speed measurement device 30 is introduced into the housing 900A via the lens holder 915 and the condenser lens 920.

Figure 96 is a diagram showing the electronic device 900 with the second housing 902 removed. Figure 97 is a diagram showing the electronic device 900 with the condenser lens 300 further removed. Figure 98 is a diagram showing the electronic device 900 with the first housing 901 removed.

A substrate 930 is provided inside the housing 900A. The substrate 930 is a substantially rectangular shape that is longer in the width direction than in the vertical direction, and has substantially the same shape and dimensions as the front surface of the first housing 901 and the rear surface of the second housing 902. A light receiving unit 920A (condensing lens 920) is provided in a position toward the upper right of the substrate 930 when viewed from the rear surface side. The condensing lens 920 is designed and manufactured to condense the pulsed light Lout at a predetermined focal distance position. The light receiving element 931 receives the light condensed by the condensing lens 920. The electronic device 900 has a light receiving element 931 as one light receiving element. The light receiving element 931 may have the same configuration as the light receiving element 410. The light receiving element 931 is provided on the surface of the substrate 930 opposite to the surface on which the condensing lens 920 is present, which is the front surface of the electronic device 900 in this embodiment. Therefore, the light receiving element 931 receives light that has passed through the light transmitting portion 932 provided on the substrate 930. In this example, the light transmitting portion 932 is a rectangular parallelepiped opening.

The filter 933 may have the same configuration as the filter 250, and is an example of a wavelength selection section corresponding to the first wavelength selection section 121. The filter 933 is provided between the light receiving element 931 and the condenser lens 920, and selects and transmits light of a specific wavelength λout from the incident light. The filter 933 may have any configuration and may be removed. The shield plate 934 is a shield made of, for example, aluminum or a conductive material, and is provided in an area surrounding three of the four sides of the transparent section 932. The shield plate 934 is intended to suppress the influence of static electricity and the like on the light receiving element 931 and other electronic components. The light receiving element 931 is housed in a shield case 935. The shield case 935 is provided on the surface of the board 930 opposite to the surface on which the condenser lens 920 is present, which is the front surface of the electronic device 900 in this embodiment, and covers the entire light receiving element 931. Such a shield case 936 performs the same function as the shield case 280.

In this way, the light receiving element 931 is disposed on the surface of the substrate 930 that faces the front side of the electronic device 900. This allows for more reliable shielding using a simple method, and since the substrate 930 is between the light receiving element 931 and the condenser lens 920, the space equivalent to the focal length can be effectively utilized. As a result, this also contributes to making the electronic device 900 more compact overall.

The speaker 913 constitutes a part of the sound emission unit 913A and outputs sound. The speaker 913, the operation unit 912, the DC jack 914, and the light receiving unit 920A (light receiving element 921) are electrically connected to the control unit 916. The control unit 916 controls each unit of the electronic device 90, and is, for example, a computer including an arithmetic processing circuit and a memory. The control unit 916 may be provided on the surface of the substrate 930 on which the condenser lens 920 is present, or on the opposite surface. The control unit 916 may perform an alert in response to the reception of the pulsed light Lout in the same manner as the control unit 11 described in [12. Other embodiments] above. In addition, when the control unit 11 receives the pulsed light Lout, it causes the light emitting unit 911 to emit light in red or emits an alarm sound using the speaker 913. The control unit 916 controls the output of the alarm sound in response to the result of the volume adjustment in response to the operation of the operation unit 912. The control unit 916 may perform control other than that of the display unit in the same manner as in the other embodiments described above.

The electronic device 900 having the above configuration is attached to a vehicle by selectively using the first attachment member 940 and the second attachment member 950. The first attachment member 940 is a member for attaching the electronic device 900 to the dashboard, and is also called a dashboard attachment bracket. The second attachment member 950 is also called a suspended attachment stay.

Figure 99 is a diagram showing the electronic device 900 attached to the dashboard using the first attachment member 940. Figure 99(a) is a diagram showing the electronic device 900 viewed from diagonally above and to the right on the front side of the electronic device 900. Figure 99(b) is a diagram showing the electronic device 900 viewed from diagonally above and to the right on the rear side of the electronic device 900. Figure 100 is a diagram showing the external configuration of the first attachment member 940. Figure 101 is a diagram explaining a method of attaching the electronic device 900 using the first attachment member 940.

The first mounting member 940 includes a base portion 941, a socket portion 942, a ball stud 943, and an attachment portion 944. The base portion 941 is a portion that is attached to the dashboard of the vehicle. The bottom surface of the base portion 941 is attached to the dashboard using a fixing member such as an adhesive sheet or double-sided tape of Patent No. 5958927 (FIG. 101(a)). The base portion 941 includes a socket portion 942 having a space that opens to the front side. The ball portion of the ball stud 943 is attached to the socket portion 942. The socket portion 942 and the ball stud 943 attached to the socket portion 942 form a ball joint mechanism. The ball stud 943 changes its position up, down, left and right when attached to the socket portion 942 in response to an external force. The attachment portion 944 is provided at a position on the front side of the ball stud 943. The attachment portion 944 is attached to the attachment portion 917 of the electronic device 900. The mounting portion 944 has a pair of protruding portions 9441 and 9442 that protrude to both the left and right sides when viewed from the front. The protruding portion 9441 protrudes further toward the front side than other portions of the mounting portion 944, and protrudes to the right side when viewed from the front. The protruding portion 9442 protrudes further toward the front side than other portions of the mounting portion 944, and protrudes to the left side when viewed from the front. The protruding portion 9441 is inserted into the groove portion 9171, and the protruding portion 9442 is inserted into the groove portion 9172. When the mounting portion 944 is mounted on the mounting portion 917, it is moved from the bottom to the top with the protruding portions 9441 and 9442 inserted into the groove portions 9171 and 9172, respectively (FIG. 101(b)). After this attachment, the base portion 941 is attached to the attachment portion (attachment surface) of the dashboard (FIG. 101(c)). In this manner, attachment is completed, and the electronic device 900 can receive an external force and change its position up, down, left, and right while attached to the first attachment member 940 (FIG. 101(d)). The user can point the electronic device 900 in the desired direction.

The mounting part 944 may be configured to change the height of the attached electronic device 900. The mounting part 944 may be, for example, a curved arm-shaped member, and the height of the electronic device 900 may be changed by rotating the mounting direction 180 degrees in the vertical direction. For example, the position of the electronic device 900 becomes higher and the front of the electronic device 900 faces slightly upward. The configuration for making the height of the electronic device changeable may be other configurations, for example, a pair of protrusions 9441, 9442 may be provided at a position shifted above or below the center in the vertical direction of the mounting part 944, and may be configured to be attached to the electronic device even if it is turned upside down. Such attachment using the first mounting member 940 may be applied to any electronic device described in this specification. In particular, when applied to an electronic device (for example, electronic device 10) having a display unit (for example, display unit 13) on the front surface, the position of the display unit becomes higher and faces slightly upward from the horizontal direction, making it easier for the user to view the display unit.

Figure 102 is a diagram showing the electronic device 900 attached by hanging using the second attachment member 950. Figure 102(a) is a diagram showing the electronic device 900 viewed from diagonally above and to the right on the front side of the electronic device 900. Figure 102(b) is a diagram showing the electronic device 900 viewed from diagonally above and to the right on the rear side of the electronic device 900. Figures 103 to 105 are diagrams showing the external configuration of the second attachment member 950. Figure 106 is a diagram explaining a method of attaching the electronic device 900 using the second attachment member 950.

The second mounting member 950 is a plate-like member formed using a metal such as aluminum. The second mounting member 950 has a first portion 951, a second portion 952, and a third portion 953. The first portion 951 is a plate-like portion. The first portion 951 supports the electronic device 900 by contacting its top surface with the bottom surface of the electronic device 900.

The second part 952 is a plate-like part connected to the first part 951 and approximately perpendicular to the first part 951. The second part 952 is shorter in the width direction than the first part 951. The second part 952 supports the electronic device 900 by contacting one surface with the rear surface of the electronic device 900. The second part 952 has a pair of protrusions 9521, 9522 protruding on both the left and right sides when viewed from the front side as a part to be attached to the mounting part 917 of the electronic device 900. The protrusion 9521 protrudes further toward the front side than other parts of the second part 952 and protrudes to the right when viewed from the front side. The protrusion 9522 protrudes further toward the front side than other parts of the second part 952 and protrudes to the left when viewed from the front side. The protrusion 9521 is inserted into the groove 9171, and the protrusion 9522 is inserted into the groove 9172, thereby attaching to the second part 952 (Figure 106 (c)).

The second portion 952 further has a notch 9523. The notch 9523 is cut out so as not to overlap the condenser lens 920 when the second mounting member 950 is attached to the electronic device 900. In this way, the second portion 952 is configured not to cover the condenser lens 920 from the back side. The notch 9523 may be cut out in a shape that follows the outer edge of the lens holder 915, for example. This is because the second portion 952 does not interfere with the reception of light by the light receiving portion 920A while ensuring the contact area between the second portion 952 and the electronic device 900. Of course, the notch 9523 may be cut out in other shapes as long as it does not interfere with this reception of light.

The third portion 953 is a plate-like portion connected to the second portion 952. The third portion 953 is attached (e.g., pasted) to the attachment portion using a fixing member such as double-sided tape, with its upper surface serving as an attachment surface. The third portion 953 may be longer in the width direction than the second portion 952 and may be longer in the width direction than the first portion 951. The third portion 953 is configured to be bendable along the boundary portion 9531, and can change its posture relative to the second portion 952 when subjected to an external force. The boundary portion 9531 is a portion that is a boundary between the third portion 953 and the second portion 952. The boundary portion 9531 is made smaller in the width direction to facilitate folding, but a member such as a hinge may be provided. The second attachment member 950 is folded in response to an external force, and is maintained in the folded state (shape) even after the external force is removed.

When the user installs the electronic device 900, the position of the third portion 953 relative to the second portion 952 may be adjusted according to the shape of the installation portion in the vehicle, in this embodiment, the inclination of the windshield. For example, the installation portion (the place where the electronic device 900 is attached) may be determined in advance, and the second mounting member 950 may be bent and the angle adjusted so that the electronic device 900 is as horizontal as possible to the road. As shown in Figs. 106(a) and 106(d), the third portion 953 is attached to the installation portion C1, which is the gap area between the ceiling C2 and the windshield C3 (which may be the area near the upper end of the windshield C3), using double-sided tape. The gap area may be recognized by the user as a black border. For example, if the installation portion C1 is located behind the rearview mirror, it is desirable for the people in the vehicle to have the electronic device 900 hidden behind the rearview mirror. If the third portion 953 is formed to be long in the width direction, it is easier to ensure the adhesion area of the second mounting member 950 to the installation portion C1, and the electronic device 900 can be fixed more stably. The mounting portion C1 and the third portion 953 are fixed to the mounting portion C1 using, for example, double-sided tape. In this way, when the electronic device 900 is mounted using the second mounting member 950, the safety standard is met. In addition, since the electronic device 900 receives the pulsed light Lout from the speed measuring device 30 at a relatively high position, the reception of the light is less likely to be hindered by obstacles such as a vehicle ahead. Furthermore, in certain vehicle models, the portion near the upper end of the windshield of the vehicle may be configured to have a higher light transmittance than other portions. For this reason, the use of the second mounting member 950 makes it easier for the electronic device 900 to receive the pulsed light Lout. Therefore, by mounting using the second mounting member 950, the electronic device 900 can perform control to issue a more accurate alarm. In addition, such mounting makes it difficult for the electronic device 900 to be seen from inside or outside the vehicle, which may be desirable in terms of the aesthetics of the interior of the vehicle. In addition, the mounting portion may be a portion other than the windshield, for example, the rear side of the room mirror.

[16. Other Examples of Electronic Devices]
In this embodiment, a configuration in which the electronic device 80A described in [14. Other examples of electronic devices] is attached by hanging will be described. Figs. 107 to 109 are diagrams showing a state in which the electronic device 80A is attached by hanging using an attachment member 960. Fig. 107(a) is a diagram showing the electronic device 80A viewed from the upper right diagonal direction on the rear side of the electronic device 80A. Fig. 107(b) is a diagram showing the electronic device 80A viewed from the upper right diagonal direction on the rear side of the electronic device 80A. Fig. 108 is a diagram showing the electronic device 80A viewed from below. Fig. 109(a) is a diagram showing the electronic device 80A viewed from the upper right diagonal direction on the rear side of the electronic device 80A when the attachment angle is changed. Fig. 109(b) is a diagram showing the electronic device 80A viewed from the upper right diagonal direction on the rear side of the electronic device 80A when the attachment angle is changed. Figs. 110 to 111 are diagrams showing the external configuration of the attachment member 960. The mounting member 960 includes a portion that can be bent in response to an external force, and the bent state (shape) is maintained even after the external force is removed.

The mounting member 960 is a plate-like member formed using a metal such as aluminum. The mounting member 960 has a first portion 961, a second portion 962, a third portion 963, a fourth portion 964, a fifth portion 965, and a sixth portion 966. The first portion 961 is a plate-like portion. The longitudinal direction of the first portion 961 corresponds to the depth direction of the electronic device 80A. The longitudinal length of the first portion 961 is approximately the same as or longer than the depth direction length of the electronic device 80A. The upper surface of the first portion 961 and the electronic device 80A are fixed using an adhesive material such as double-sided tape, but a fixing tool or other method may be used. The sixth portion 966 is connected to one end of the first portion 961. The sixth portion 966 is configured to be bendable along the boundary portion 9661, and is capable of changing its posture relative to the first portion 961 when subjected to an external force. The boundary portion 9661 is a portion that is a boundary between the first portion 961 and the sixth portion 966. The boundary portion 9661 is made smaller in width to facilitate folding, and may be provided with a member such as a hinge.

In the state shown in Figures 107 and 108, the upper surfaces of the first portion 961 and the sixth portion 966 are on the same plane. In this case, the upper surfaces of the first portion 961 and the sixth portion 966 come into contact with the bottom surface of the electronic device 80A, thereby supporting the electronic device 80A. On the other hand, in the state shown in Figure 109, the sixth portion 966 is bent downward by approximately 180 degrees from the state shown in Figures 107 and 108, and comes into contact with the bottom surface of the first portion 961. In this case, the upper surface of the first portion 961 comes into contact with the bottom surface of the electronic device 80A, thereby supporting the electronic device 80A. The reason why these two states are possible will be described later.

The second part 962 is a plate-like part connected to the first part 961 and approximately perpendicular to the first part 961. The height direction length of the second part 962 is approximately the same as or longer than the height direction length of the electronic device 80A. The second part 962 may support the electronic device 80A by contacting one surface with the front surface of the electronic device 80A. The third part 963 is a plate-like part connected to the second part 962 and approximately perpendicular to the second part 962. The third part 963 is a surface approximately parallel to the first part 961, but the dimension in the longitudinal direction (corresponding to the depth direction of the electronic device 80A) is shorter than the dimension in the depth direction of the first part 961. The dimensions in the width direction (short side direction) of the second part 962 and the third part 963 are approximately the same. When electronic device 80A is supported by being sandwiched on three sides between first part 961 (and sixth part 966), second part 962, and third part 963, it is expected that electronic device 80A will be held more stably.

The fourth portion 964 is a plate-like portion connected to the third portion 963. The fourth portion 964 is configured to be bendable along the boundary portion 9641, and is capable of changing its position relative to the third portion 963 when subjected to an external force. The boundary portion 9641 is a portion that is a boundary between the fourth portion 964 and the third portion 963. The boundary portion 9641 has a small width dimension to facilitate bending, and may be provided with a hinge-like member.

The fifth portion 965 is a plate-like portion connected to the fourth portion 964. The upper surface of the fifth portion 965 is attached (e.g., pasted) to the attachment portion using a fixing member such as double-sided tape, with the upper surface serving as the attachment surface. The fifth portion 965 is configured to be bendable along the boundary portion 9651, and is capable of changing its attitude relative to the fourth portion 964 when subjected to an external force. The boundary portion 9651 is a portion that is a boundary between the fifth portion 965 and the fourth portion 964. The boundary portion 9651 is reduced in width to facilitate bending, but may be provided with a member such as a hinge. The attitude of the fourth portion 964 relative to the third portion 963 and the attitude of the fifth portion 965 relative to the fourth portion 964 may be adjusted according to the shape of the attachment portion in the vehicle, in this embodiment, the inclination of the windshield.

Figure 112 shows a side view of electronic device 80A attached to a windshield using mounting member 960. Figure 112(a) shows a case where the inclination angle of the windshield is 30 degrees with respect to the horizontal direction, and Figure 112(b) shows a case where the inclination angle of the windshield is 60 degrees with respect to the horizontal direction.

In the example of FIG. 112(a), the sixth portion 966 has an upper surface located on the same plane as the upper surface of the first portion 961. Furthermore, the electronic device 80A is disposed on the upper surfaces of the first portion 961 and the sixth portion 966, and is disposed as close to the windshield as possible. In this way, when the windshield has a relatively gentle inclination, the electronic device 80A can be disposed closer to the windshield. Therefore, for example, compared to when the sixth portion 966 does not exist, the electronic device 80A can more easily receive the pulsed light Lout.

On the other hand, in the example of FIG. 112(b), the sixth portion 966 is bent downward from the first portion 961. The electronic device 80A is disposed on the upper surface of the first portion 961 and is not in contact with the sixth portion 966. In this way, when the windshield has a relatively steep inclination, the sixth portion 966 moves the windshield downward, thereby enabling the electronic device 80A to be disposed closer to the windshield. Therefore, for example, compared to a case in which the sixth portion 966 cannot be bent, the electronic device 80A can more easily receive the pulsed light Lout.

Therefore, by using the mounting member 960 for mounting, the electronic device 80A can be controlled to issue a more accurate alarm regardless of the inclination angle of the mounting portion of the vehicle. In addition, the use of the mounting member 960 also achieves the same effect as the use of the second mounting member 950. Note that even if the mounting member 960 is configured without the sixth portion 966, the mounting member 960 still achieves the function of supporting the electronic device 80A.

17. Other embodiments
A stay (dashboard mounting stay) that can be attached to the mounting portion 917 of the electronic device 900 described in [15. Other embodiments] to fix the electronic device 900 to the dashboard may be used as the mounting member. As shown in FIG. 113, this stay 970 is formed of a metal such as aluminum. The stay 970 has a plate-shaped first portion 971 whose underside is attached to the dashboard using a fixing member such as an adhesive sheet or double-sided tape (double-sided tape for the main body), a plate-shaped second portion 972 perpendicular to the first portion 971, and a pair of protruding portions 973 and 974 that protrude from the second portion 972 to both the left and right sides. The protruding portion 973 protrudes further forward than the second portion 972 and protrudes to the right when viewed from the front side. The protruding portion 974 protrudes further forward than the second portion 972 and protrudes to the left when viewed from the front side. The pair of protrusions 973, 974 can be attached to grooves 9171, 9172, respectively, of the attachment portion 917 of the electronic device 900. The stay 970 may be further fixed to the second housing 902 of the electronic device 900 using a fastener such as a screw.

In addition, in [15. Other embodiments], [16: Other present embodiments], and [17: Other present embodiments], cases where an electronic device without a display unit is attached to a dashboard or suspended in mid-air are described, but an electronic device with a display unit may also be attached to a dashboard or suspended in mid-air.

Figure 114 shows six views of the second mounting member 950 described above, and Figure 115 shows six views of the mounting member 960 described above. In Figures 114 and 115, the front view is shown in the center, with a top view (plan view) at the top, a left side view on the left, a right side view on the right, a bottom view at the bottom, and a rear view below the bottom view.

18. Modifications
(18-1) The condenser lens 300 may be a cylindrical lens or a linear Fresnel lens. In the latter case, the condenser lens 300 becomes thin. In addition, two cylindrical lenses may be arranged to cross each other so as to form an image at a point on the light receiving element, or two linear Fresnel lenses may be arranged to cross each other.

(18-2) In the configuration of (18-1), a filter that extracts and passes light of a specific wavelength may be placed between the two lenses.

(18-3) In the configuration of (18-1), the focal position of only one of the lenses may be shifted from the position of the light receiving element.

(18-4) APD (Avalanche Photodiode), MPPC (Multi-Pixel Photon Counter), etc. may be used as the light receiving element.

(18-5) The electronic device may use a prism or the like to split the spectrum and issue an alarm when a light receiving element receives light at a specific wavelength (for example, 905 nm). Also, light incident on a light receiving element corresponding to a position of another wavelength may be treated as a source of a false alarm.

(18-6) A light receiving unit may be provided on the front of the electronic device to receive light from behind. For example, it may be compatible with a tracking laser (a laser from a police car). The electronic device may (a) use the reception of light from a tracking laser as a trigger to record rear camera images for 10 seconds in the front and up to one minute after the rear is no longer detected. The electronic device may (b) change the content of the alarm depending on whether light is received from the front or rear. The electronic device may (c) receive either the light from the front side or the light from the rear side by a sensor guided by an optical fiber.

(18-7) The electronic device may emit a predetermined sound (e.g., "Good morning!") when it receives radar waves a predetermined number of times (e.g., 21 times) per second.

(18-8) The electronic device may use image recognition from a camera (e.g., the vehicle-mounted camera 50) to recognize the type of speed camera and issue an alert about the type. When the user asks "Was that a speed camera?", the electronic device may respond with "Yes" or "No" based on the image recognition results.

(18-9) The electronic device may be equipped with an optical means (lens, etc.) that focuses the half-value angle of one incident light beam to approximately 3 degrees or less on either side (currently approximately 5 degrees) and receives light from the speed measuring device 30.

(18-10) Laser light from a speed enforcement device may be received using a light receiving element with a sensor area of less than 1 mm. Currently, the sensor area is approximately 1 mm.

(18-11) Flocked paper may be attached or anti-reflective material may be applied to the area surrounding the optical path between the optical means (e.g., the focusing lens 300) and the light receiving element 410 (where the black tape is currently).

(18-12) A diaphragm member that narrows the optical path may be provided between the optical means (e.g., the focusing lens 300).

(18-13) The condenser lens 300 may have polished entrance and exit surfaces. Here, the entrance and exit surfaces may be polished to a different degree. It is preferable to process the exit surface so that it is not smooth.

(18-14) It is not necessary to provide a visible light blocking material on the outer surface of the housing. It is preferable to provide a transparent cover material on the outer surface of the housing. It is preferable to make at least some of the components of the band-pass filter visible when viewed from the outer surface of the housing. It is preferable to make at least some of the components of the light receiving element visible when viewed from the outer surface of the housing.

(18-15) The focusing lens 300 should be, for example, 3 mm or 4 mm or less at its thickest point. This will improve the transmittance.

(18-16) The condenser lens 300 may be molded in two colors, one using a visible light blocking material and the other using a transparent material. For example, the lens may be formed using a transparent material, and a visible light blocking plate may be placed behind the lens. For example, a plate of one material may be used to press and fix the lens of the other material to the housing. The condenser lens 300 and the lens holder that holds the condenser lens 300 may be integrally formed, and may be brought into contact with the second substrate 1030, which has a surface perpendicular to the optical axis of the condenser lens 300 and has the light receiving unit 400. The lens holder may have a surface, and may be configured so that the light receiving unit is located at the optical axis when part of the holder is inserted into a hole in the second substrate 1030 (when the lens holder is pressed by the second substrate 1030, it automatically aligns with the optical axis, and tilt is suppressed).

(18-17) A hole corresponding to the center of the focusing lens 300 may be drilled on the lens holder side.

(18-18) The electronic device may record the spot dancing state of the laser light using an on-board camera. Recording should be from the start of laser reception to the end.

(18-19) For electronic devices, it is a good idea to use an in-car camera to record fog and other conditions. Recording should be done from the start of reception of the pulsed light to its end. Infrared light is affected by water droplets, so this is useful for pointing out erroneous measurements.

(18-20) It is advisable to perform processing to output information from images captured by an onboard camera to determine whether an speed camera (fixed or mobile) was installed properly during measurement.

(18-21) If radar waves are detected for a certain period of time or longer when an electronic device is turned on, a message such as "Is there another radar detector nearby? That is a product that is emitting severe interference. Please move away." may be displayed.

[19. Modifications of the Electronic Device Having a Plurality of Light Receiving Elements of the First Embodiment, etc.]
(19-1) The first wavelength selecting section 121 may be configured to include a band pass filter instead of the polarizing filter or in addition to the polarizing filter.

(19-2) The second wavelength selection unit 123 may be configured to include a filter instead of a polarizing filter or in addition to a polarizing filter, so that when the pulsed light Lout detection level is high and the other light detection levels are low, it can be more reliably processed as a warning target.

(19-3) It is preferable that both the first light receiving element 122 and the second light receiving element 124 are used for detecting pulsed light. In this case, it is preferable that both the first wavelength selection unit 121 and the second wavelength selection unit 123 are filters with characteristics for selecting and receiving light of a specific wavelength.

(19-4) A cylindrical lens (with a size that maintains the width of the existing housing window) may be provided so as to span the two first light receiving elements 122 and the second light receiving elements 124 (for example, so that the semi-cylindrical lens is oriented horizontally). A light amount detection balance circuit, whose output voltage becomes zero when the amount of light entering the two light receiving elements is equal, may be added to the existing level detection section to detect signals from the two first light receiving elements 122 and the second light receiving element 124. When the signals from the two photodiodes rise together, they are detected by a circuit that can detect with high sensitivity.

(19-5) The partition (shield) between the first light receiving element 122 and the second light receiving element 124 may be removed. This can minimize the change in the housing structure to shorten the distance between the two photodiodes, or can improve detection sensitivity.

(19-6) Japanese Patent No. 6161429 describes how two laser light sources are incident on a polygon mirror and reflected, scanning a wide area by scanning the laser irradiation direction horizontally with the polygon mirror as the center, the laser oscillation is set to 0.25° intervals, for example, and the light is received by four light receiving parts. The data obtained from the scanning laser sensor is a distance distribution in a polar coordinate system around the sensor, and this data is acquired at a cycle of 12.5 Hz (80 ms). If a light pattern corresponding to these parameters is detected, a notification is issued that it is a laser speed camera. In particular, it is advisable to identify that a laser from a specific manufacturer has been detected and notify that fact.

20. Other embodiments
As shown in FIG. 118, the electronic device may have radar sensitivity settings of "OFF" and "AAC/CUSTOM (custom)". "OFF" means that no alarm is issued even if a radar signal is received. Custom allows detailed settings as follows. Conventionally, there was no setting to turn off the alarm display and alarm sound, so for example, by setting the vehicle speed and alarm level to the minimum, the number of alarms themselves is reduced, and as a result, false alarms are reduced. The relationship between the mode and the notification control is as shown in FIG. 118. The alarm speed setting can be set in 11 stages, for example, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 km/h or more. The alarm level setting can be set in five stages, ALL (alert all levels), level 2 or more, level 3 or more, level 4 or more, and level 5 only. For example, since there are many sources of false alarms in urban areas, it is advisable not to issue alarm sounds below a certain level. The electronic device may display an alarm without sounding an alarm. In addition, the electronic device may reduce the volume of the alarm sound when the reception of the radar wave/laser light continues for about 30 seconds or more. Also, the alarm sound may be emitted as shown in FIG.

21. Other embodiments
An "unmasked patrol warning" may be realized by applying image recognition. Currently, unmasked patrol cars (follow-up speed violation enforcement) approach from the rear of the vehicle. Although such unmasked patrol cars cannot be easily judged by their appearance, in reality, they have several characteristics. Therefore, an "unmasked patrol warning" may be issued using these characteristics and the position information of the enforcement position. For example, when the position information of the current position has a predetermined proximity relationship with the position information of the public enforcement position or the enforcement POI, the electronic device issues an alarm if it recognizes the above characteristics. It is sufficient to increase the accuracy of the alarm to once in 10 times or once in 5 times based on the characteristics of the car (for example, a specific car model), the number of people in the car wearing blue uniforms, the license plate number (starting with a specific number), the number of passengers, whether or not the car is chasing from behind, and the difference in the movement of the car before and after passing.

22. Modifications
The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit and scope of the present disclosure.

(Variation 1)
The control unit 11 may determine the presence or absence of a speed measuring device based on a digital value corresponding to the amount of received light for the optical method, and an analog value corresponding to the received radio waves for the radar method. This is because the strength of radio waves may change more gradually with distance than the strength of light. The control unit 11 may also determine the presence or absence of reception of pulsed light or microwaves by varying the duration of reception, such as 3 seconds for the optical method and 1 second for the radar method. These durations may be the same.

(Variation 2)
The electronic device 10 may have a dedicated light-emitting unit for notifying the presence of an optical speed measuring device when the electronic device 10 detects the presence of the optical speed measuring device. In this case, the electronic device 10 does not light up this light-emitting unit to notify the presence of another type of speed measuring device. The electronic device 10 may not light up this light-emitting unit except when the electronic device 10 detects the presence of an optical speed measuring device. The electronic device 10 may light up the light-emitting unit in a color or pattern specific to the case when the electronic device 10 detects the presence of an optical speed measuring device. This light-emitting unit may be the light-emitting unit 23 or may be a light-emitting unit separate from the light-emitting unit.

(Variation 3)
The first wavelength selection unit 121 and the second wavelength selection unit 123 may not be band pass filters. The first wavelength selection unit 121 and the second wavelength selection unit 123 may be, for example, a combination of a low pass filter and a high pass filter. The second wavelength selection unit 123 may be a low pass filter as shown by the characteristics in FIG. 118(a). In this example, the second wavelength selection unit 123 transmits light in a wavelength region lower than the wavelength λ2a and blocks light in a wavelength region higher than the wavelength λ2a. The second wavelength selection unit 123 may be a high pass filter as shown by the characteristics in FIG. 118(b). In this example, the second wavelength selection unit 123 transmits light in a wavelength region higher than the wavelength λ2b and blocks light in a wavelength region lower than the wavelength λ2b. Even in this case, the amount of light received by the second signal Sig2 becomes extremely small during the period in which the pulsed light Lout is received. The light receiving unit 12 receives not only the pulsed light Lout, which is the object of the reception, but also disturbance light, but such disturbance light generally has a wide wavelength range in which the energy is distributed. Therefore, even if the light receiving unit 12 receives disturbance light that is periodically turned on and off, it is considered that the amount of received light is large. Therefore, when the amount of received light of the first signal Sig1 is large and the amount of received light of the second signal Sig2 is small, that is, when the difference is equal to or greater than the threshold, it can be estimated that the pulsed light Lout has been received. On the other hand, when the amount of received light of the first signal Sig1 is large and the amount of received light of the second signal Sig2 is also large, that is, when the difference is less than the threshold, it can be estimated that the possibility of receiving the pulsed light Lout is low. Therefore, according to the electronic device 10, by receiving light using the first light receiving element 122 and the second light receiving element 124, it is expected that the detection accuracy of the speed measuring device 30 can be improved. Furthermore, the first wavelength selecting section 121 and the second wavelength selecting section 123 may be configured using optical elements other than filters, such as prisms.

(Variation 4)
In the above-described embodiment, the light receiving unit 12 has two elements, the first light receiving element 122 and the second light receiving element 124, but it may have only one element. FIG. 119 is a diagram showing the configuration of the electronic device 10 in this modified example. In this example, the light receiving unit 12 does not have the first light receiving element 122 or the second light receiving element 124, but has a light receiving element 128. The light receiving element 128 may have the same configuration as the first light receiving element 122 or the second light receiving element 124. In addition, the electronic device 10 in this modified example has a driving unit 60. The driving unit 60 moves the first wavelength selecting unit 121 and the second wavelength selecting unit 123 according to the control of the control unit 11. The driving unit 60 has, for example, a motor and a gear. The control unit 11 moves the first wavelength selecting unit 121 and the second wavelength selecting unit 123 so as to alternately cover the light receiving surface of the light receiving element 128 during the operation of the electronic device 10. That is, as shown in Fig. 120(a), the control unit 11 first provides the first wavelength selection unit 121 on the light receiving surface of the light receiving element 128. Then, the control unit 11 obtains the signal obtained from the light receiving element 128 at this time as the first signal Sig1. Next, as shown in Fig. 120(b), the control unit 11 first moves the first wavelength selection unit 121 away from the light receiving surface of the light receiving element 128 and provides the second wavelength selection unit 123 on the light receiving surface. Then, the control unit 11 obtains the signal obtained from the light receiving element 128 at this time as the second signal Sig2. Then, the control unit 11 detects the speed measurement device 30 based on the first signal Sig1 and the second signal Sig2.

(Variation 5)
In the above embodiment, the light receiving unit 12 has two light receiving elements, the first light receiving element 122 and the second light receiving element 124, but it is preferable that the light receiving unit 12 has three or more light receiving elements. Even in this case, the control unit 11 can be expected to improve the detection accuracy of the speed measurement device 30 by selecting different wavelength ranges of light for each of the three or more light receiving elements.

(Variation 6)
In the above description, the light receiving unit 12 has at least one set of a wavelength selection unit and a light receiving element. Alternatively, the light receiving unit 12 may have at least one light receiving element without having a wavelength selection unit. For example, the light receiving unit 12 may receive a third amount of light when a specific wavelength is selected and received, instead of the second amount of light received, which is the amount of light received of a wavelength different from the specific wavelength. In this case, the control unit 11 may perform control to notify the presence of the speed measurement device 30 based on the second amount of light received and the third amount of light received.

The light receiving unit 12 may receive the incident light by a single light receiving element. The control unit 11 may then perform control to notify the presence of the speed measuring device 30 based on a pulse width or pulse interval determined based on the amount of light received by the light receiving unit 12. The method using the pulse width or pulse interval may be similar to the modified example of the first embodiment described above. The control unit 11 may perform control to notify the presence of the speed measuring device 30 if at least one waveform of pulsed light Lout is received.

(Variation 7)
The light receiving element may be an imaging element of a camera such as a drive recorder. For example, the control unit 11 acquires an image captured by the vehicle-mounted camera 50 and performs image analysis. The vehicle-mounted camera is preferably a camera without an infrared cut filter. This is to prevent the pulsed light Lout from being blocked. Then, when light of a specific pattern is received as a result of the image analysis, the control unit 11 performs control to notify the presence of the speed measurement device 30. The control unit 11 may detect the light of the specific pattern based on a change in brightness indicating that it is light of a specific wavelength. When light of a specific pattern is received, the control unit 11 may record the captured image for a period corresponding to the light receiving period. The period is, for example, a period of one minute before and after the timing when light of the specific pattern is received, but is not limited to this.

(Variation 8)
The electronic device 10 may detect the speed measuring device 30 behind the vehicle 40. In this case, the light receiving unit 12 may be disposed so as to be able to receive pulsed light from the vehicle 40.

(Variation 9)
When the electronic device 10 detects the speed measurement device 30, it is preferable that the electronic device 10 uploads information such as location information indicating the location of the speed measurement device 30 to a server. The server may be a server that provides a social networking service, or a server that manages and distributes update information regarding the object to be notified.

The user may be inquired of in advance or at each detection or transmission timing as to whether or not the electronic device 10 is to transmit location information. Obtaining prior consent reduces the burden on the user. The server may store location information and distribute it to other electronic devices 10. When the electronic device receives location information from the server, it issues a notification when it approaches the location indicated by the location information. The notification may be issued by the method already described, but the control unit 11 may display, for example, an icon as information clearly indicating that the notification is based on posted information. Furthermore, notifications based on posted information may be issued only within a specified period from the detection of the presence of a speed measuring device or the transmission of location information. This is because enforcement is often carried out at set times.

In addition to detecting speed measuring devices, the system disclosed herein can also be used to detect light emitting devices that emit light of a specific wavelength.

(Variation 10)
A part of the configuration and operation described in each of the above-mentioned embodiments may be omitted or changed. For example, the electronic device 10 may be an optical device that does not support a radar device. For example, the position, shape, and size of each member in the electronic device 10 are merely examples. The light receiving unit 12 may be provided outside the electronic device 10. For example, the light receiving unit 12 may be provided at a predetermined position in the vehicle 40, such as inside the license plate, bonnet, door mirror, or grill. In this case, the control unit 11 may acquire a signal from the light receiving unit 12 via the communication unit 17.

(Modification 11)
Furthermore, the control unit 11 may determine whether or not the speed measurement device 30 is present, and when it determines that at least the speed measurement device 30 is present, may output a signal indicating the determination result to an external device. This external device may notify the presence of the speed measurement device 30. Furthermore, the present invention may also be specified by a control device (e.g., a control module) incorporated in the electronic device 10 and having the same function as the control unit 11.

(Variation 12)
The GPS receiver in the above-described embodiment can be understood as a GNSS receiver having an antenna for receiving signals from a Global Navigation Satellite System (GNSS) and a processing circuit for processing the received signals. Positioning using the GNSS is commonly known as GPS positioning. The position information obtained by the positioning process using the GNSS receiver is information that represents the positioning point of the electronic device 10 in a coordinate format, and includes at least latitude information and longitude information.

(Variation 13)
A lens angle variable function may be added to an electronic device using the above-mentioned lens (e.g., the focusing lens 300, 950). In this way, it is possible to compensate for the misalignment between the laser reception viewing angle and the vehicle traveling direction. For example, the electronic device may be configured such that a lens device equipped with a lens is attached to a housing by a mechanism capable of changing the attitude of the lens device up and down and/or left and right. In this way, the user can adjust the attitude of the lens device so that the lens is directed in the desired direction.

The scope of the present invention is not limited to the configurations expressly described in the specification, but includes combinations of various aspects of the invention disclosed herein. The configurations of the invention that are sought to be patented are specified in the accompanying claims, but it is the intention of the present inventors to claim configurations disclosed in this specification that are not currently specified in the claims.

The present invention is not limited to the configurations described in the above-mentioned embodiments. The components of each of the above-mentioned embodiments and variations may be arbitrarily selected and combined. Any of the components of each of the embodiments and variations may be arbitrarily combined with any of the components described in the means for solving the invention or any of the components that embody any of the components described in the means for solving the invention. We intend to acquire rights to these as well through amendments to this application or divisional applications, etc. Furthermore, even if there is a description such as "in the case of" or "when", this is not intended to describe a configuration that is limited to that case or time. We also disclose configurations that are not in these cases or times, and we intend to acquire rights to them. Furthermore, the parts that are described in order are not limited to this order. We also disclose configurations in which some parts are deleted or the order is changed, and we intend to acquire rights to them.

In addition, we intend to obtain rights to the overall design or partial design by filing a conversion application to a design application. The drawings show the entire device in solid lines, but they include not only the overall design but also partial designs claimed for some parts of the device. For example, not only can some components of the device be made into partial designs, but the drawings also include some parts of the device as partial designs regardless of the components. A part of the device may be a component of the device, or it may be part of that component. We intend to obtain rights to not only the overall design, but also partial designs in which any part of the solid line parts of the drawings are made into dashed lines.

10: Electronic device 10A: Electronic device 11: Control unit 12: Light receiving unit 12A: Light receiving unit 12B: Light receiving unit 12C: Light receiving unit 13: Display unit 14: Speaker 15: Microwave receiving unit 16: GPS receiving unit 17: Communication unit 18: Memory unit 19: Operation unit 20: Sensor unit 21: Mounting unit 22: Power supply unit 23: Light emitting unit 24: Cable terminal unit 30: Speed measurement device 31: Speed measurement unit 32: Imaging unit 33: Strobe 40: Vehicle 41: Dashboard 42: Windshield 43: Rearview mirror 50: Vehicle-mounted camera 60: Drive unit 70: Camera 80: Electronic device 80A: Electronic device 81: Cable 90: Sensor device 100: Housing 100A: Housing 101: First window 102: Second window 103: Partition 104: Area 121: First wavelength selection unit 122: First light receiving element 123: Second wavelength selection unit 124: Second light receiving element 125: Interface 126: Visible light cut filter 127: Visible light cut filter 128: Light receiving element 171: Wireless module 201: Illuminance sensor 221: Power switch 222: DC jack 223: Button battery 250: Filter 270: Shield plate 300: Condenser lens 310: Incident surface 311: Curved surface 312: Emitting surface 313: Flat surface 314A: Leg 314B: Leg 400: Light receiving unit 410: Light receiving element 430: Differential amplifier 440: Differential amplifier 500: Reflection unit 600: Reflection unit 801: First housing 802: Second housing 803 : Cover 810: First board 820: Second board 830: Third board 840: Fourth board 841: Light receiving section 842: Light transmitting section 843: Light receiving element 850: Antenna section 851: Processing circuit 860: GPS receiving section 870: Filter 880: Shield plate 900: Electronic device 900A: Housing 901: First housing 902: Second housing 911: Light emitting section 912: Operation section 913: Speaker 913A: Sound emitting section 914: DC jack 915: Lens holder 916: Control section 917: Mounting section 918: Screw 919: Screw 920: Condenser lens 920A: Light receiving section 921: Light receiving element 930: Board 931: Light receiving element 932: Light transmitting section 933: Filter 934: Shield plate 935: Shield case 936: Shield case 940: First mounting member 941: Base portion 942: Socket portion 943: Ball stud 944: Mounting portion 950: Second mounting member 951: First part 952: Second part 953: Third part 960: Mounting member 961: First part 962: Second part 963: Third part 964: Fourth part 965: Fifth part 966: Sixth part 970: Stay 971: First part 972: Second part 973: Protrusion 974: Protrusion 1001: First housing 1002: Second housing 1002A: Second housing 1003: Lid portion 1006: Lens holder 1010: First board 1030: Second board 1031: Shield case 1033: Light-transmitting portion 1331: Control circuit

Claims (22)

A system that is provided in a vehicle and emits light of a specific wavelength to notify the presence of a device that detects the presence of the vehicle,
A focusing lens including an entrance surface having an aspheric curved surface and an exit surface from which light incident on the entrance surface exits;
a light receiving element that receives the light emitted from the emission surface;
a control unit that performs control to notify the presence of the light emitting device based on the light of the specific wavelength received by the light receiving element;
A system having The system of claim 1 , wherein the entrance surface includes a convex curved surface along a width direction of the vehicle. The system according to claim 1 or 2, wherein the entrance surface has a length in a width direction of the vehicle that is greater than a length in a height direction of the vehicle. The system according to claim 1 , wherein the entrance surface includes a convex curved surface along each of a width direction of the vehicle and a height direction of the vehicle. The system according to claim 1 , wherein the entrance surface includes a convex curved surface along a width direction of the vehicle and a flat curved surface along a height direction of the vehicle. The system of claim 1 , wherein the exit surface comprises a flat surface. The system according to claim 1 , wherein the light receiving element is disposed at a position closer to the condenser lens than a focal distance position of the condenser lens. The system according to any one of claims 1 to 7, wherein the control unit performs control to notify the presence of the device when the pulse width of the light received by the light receiving unit is within a certain range from a reference pulse width. The system according to claim 1 , wherein the control unit performs control to notify the presence of the light emitting device when pulsed light having a pulse width of 20 ms is received. The system according to any one of claims 1 to 9, wherein the control unit performs control to notify the presence of the device when a pulse interval of the light received by the light receiving unit is within a certain range from a reference pulse interval. The system according to claim 1 , wherein the control unit performs control to notify the presence of the device when pulsed light having a pulse interval of 80 ms is received. The system according to claim 1 , wherein the control unit changes a level of the notification in accordance with at least one of a pulse width and a pulse interval of the light received by the light receiving unit. The system according to claim 1 , wherein the control unit performs control to notify the presence of the light emitting device when the pulsed light of the specific wavelength is received at least once. The system according to claim 1 , further comprising a reflecting section that reflects at least a portion of the light emitted from the condensing lens in a direction toward the light receiving element. The system according to claim 14 , wherein the reflecting portion is provided at a position different from an optical path from the lens to the light receiving element, and includes a reflecting surface that reflects at least a portion of the light emitted from the lens in a direction toward the light receiving element. The system of claim 15 , wherein the reflective surfaces are positioned to surround the optical path. The system according to claim 15 , wherein the reflecting portion is provided on an optical path from the lens to the light receiving element, and includes a member that reflects at least a portion of the light emitted from the lens toward the light receiving element by utilizing total reflection of light. an amplifier that amplifies a signal corresponding to the amount of light received from the light receiving element;
a differential amplifier that outputs a signal corresponding to a difference between a level of the amplified signal and a threshold level;
Has
The control unit is
The system according to claim 1 , further comprising: a control for notifying the presence of the light emitting device based on a signal corresponding to the difference. The system according to claim 18 , wherein the control unit performs control to vary the threshold level. 20. The system of claim 19, wherein the control unit sets the threshold level to be greater than a level of light emitted by at least an instrument installed in the vehicle. a substrate including a first surface on the condenser lens side and a second surface opposite to the first surface;
The light receiving element is provided on the second surface side of the substrate,
The system according to claim 1 , wherein the substrate is provided with a light-transmitting portion for guiding light from the first surface side to the light-receiving element. A program for causing a computer to realize the functions of the control unit of the system according to any one of claims 1 to 21.

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