JP5111149B2 - Display device - Google Patents

Description

  The present invention relates to a display device used for an electronic photo frame (hereinafter referred to as an “electronic photo frame”) for displaying digital image data, and in particular, a display having functions related to reduction of power consumption and crime prevention. Relates to the device.

  In recent years, thin display devices using a liquid crystal panel or the like have been widely used. Such a thin display device is light and has a small installation space, and thus has an advantage that the user can appropriately change the installation location and the installation angle.

  As one of the above thin display devices, an electronic photo frame has been put into practical use. The electronic photo frame is a display device for the purpose of easily viewing an image captured by a photographing device such as a digital camera like a conventional silver halide photograph. The electronic photo frame can capture and display image data via an external recording medium such as an SD (Secure Digital) memory card or a network such as a LAN (Local Area Network).

  In relation to the above, Patent Document 1 discloses a stand-alone electronic photo frame that is provided with means for reading data from a storage medium, and that the user develops image data captured by a digital camera or the like and stored in the recording medium. In addition, an electronic photo frame capable of display is disclosed.

Patent Document 2 discloses an electronic photo frame that includes a display unit that is rotatably supported with respect to a main body and that automatically rotates in accordance with the display direction of a display image. Since the electronic photo frame rotates the display screen itself in accordance with the display image, the electronic photo frame is always displayed on the entire screen without performing a reduction process on the images having different orientations.
JP-A-9-308558 JP 2000-293111 A

  According to the electronic photo frame of Patent Document 1, it is not necessary to once capture image data captured by a digital camera into a personal computer via an external recording medium or various cables. Therefore, even a user who does not hold a personal computer or a user who is not accustomed to handling a personal computer can easily and quickly view the captured image. Further, according to the electronic photo frame of Patent Document 2, it is possible to eliminate useless margins on display by the reduction process. Oblique photographs can also be displayed without a sense of incongruity.

  However, the electronic photo frame disclosed in the above document does not have a function of determining whether the user is viewing an image in the vicinity of the electronic photo frame. Therefore, there is a problem that even if the user is not present in the vicinity of the electronic photo frame, the display is performed and power may be consumed wastefully. Further, even if a malicious third party such as an illegal intruder approaches the electronic photo frame, this cannot be detected.

  The present invention has been made in view of the above-described problems, and is a display device used for an electronic photo frame that displays image data captured by a digital camera or the like, which reduces power consumption and improves crime prevention performance. An object of the present invention is to provide a display device capable of achieving the above.

In order to achieve the above object, a display device of the present invention comprises a display means for displaying an image, a light emission amount adjusting means for adjusting the light emission amount of the display means, a sensor means for detecting the proximity and separation of a moving body, A time measuring means for measuring time, a communication means for connecting to a communication network and communicating with an external communication device, a time receiving means for receiving designation of a display prohibition time indicating a time for prohibiting image display by the display means, A display device comprising: a notification means , wherein when the moving means close to the display device is detected by the sensor means, the time is obtained using the time measuring means, and the obtained time is It is determined whether it corresponds to the display prohibition time received in advance by the time reception unit, and when it corresponds to the display prohibition time, the notification unit indicates that the mobile unit is detected using the communication unit Transmitted to the external communication device, when the time acquired does not correspond to the prohibition time, the emit light amount adjusting means increases the light emission amount of the display means, of the movable body by said sensor means When the separation is detected, the light emission amount adjusting means reduces the light emission amount of the display means.

According to this configuration, the display device of the present invention includes a display unit that displays an image, a light emission amount adjustment unit that adjusts the light emission amount of the display unit by changing the output of the backlight, and the like, and the proximity and separation of the moving body Sensor means for detecting is provided. When a moving body approaching the display device, such as a human body, is detected by the sensor means, the light emission amount adjusting means increases the light emission amount of the display means. Further, when it is detected by the sensor means that the moving body is separated, the light emission amount adjusting means reduces the light emission amount of the display means. Furthermore, the display device of the present invention has a clocking means for clocking time, a communication means for communicating by connecting to a communication network such as a LAN or the Internet, and designation of a display prohibition time indicating a time for prohibiting image display by the display means. Is provided with time receiving means for receiving. In addition, when a moving body is detected by the sensor means, there is provided a notifying means for acquiring time using a time measuring means. The notification means determines whether the acquired time corresponds to the display prohibition time received in advance by the time reception means. If applicable, the communication means is used to transmit notification information indicating detection of the moving object, such as a voice signal or an electronic mail, to a predetermined communication device.

In order to achieve the above object, the display device of the present invention includes a transition receiving unit that receives a transition instruction to a display prohibition mode that is an operation mode for prohibiting image display by the display unit, and the notification unit includes the sensor unit. When the moving body is detected by the above, it is determined whether a predetermined time has elapsed since the transition to the display prohibition mode based on the transition instruction, and the communication means is And transmitting the notification information to the external communication device .

  According to this configuration, the display device of the present invention includes the transition accepting unit that accepts an instruction to shift to the display prohibition mode, which is a mode for prohibiting image display by the display unit. When the moving unit is detected by the sensor unit, the notification unit determines whether the display device is set to the display prohibition mode and whether a predetermined time has elapsed since the display prohibition mode is entered. When the above conditions are satisfied, the notification means transmits notification information indicating detection of the moving object, such as a voice signal or an e-mail, to the predetermined communication device using the communication means.

In order to achieve the above object, the display device of the present invention includes an imaging unit, and when the notification unit performs transmission of the notification information, the imaging unit captures a peripheral image of the display device, and The peripheral image is added to the e-mail and transmitted to the predetermined external communication device .

  According to this configuration, the display device of the present invention includes imaging means such as a camera. And when an alerting | reporting means transmits the alerting | reporting information for notifying a mobile body detection, the periphery image of a display apparatus is imaged by an imaging means. The captured image is attached to the e-mail, and the attached mail is transmitted to a predetermined e-mail address to notify.

  In order to achieve the above object, a display device of the present invention includes an illuminance detection unit that detects illuminance, and a moving object that is close to the display device is detected by the sensor means, and the illuminance detected by the illuminance detection unit. Is determined to exceed the predetermined value, the light emission amount adjusting means increases the light emission amount of the display means, and the illuminance detected by the illuminance detection unit is determined to be lower than the predetermined value. In this case, the light emission amount adjusting means does not change the light emission amount of the display means.

  According to this configuration, the display device of the present invention includes the illuminance detection unit that detects the illuminance. The light emission amount adjusting unit increases the light emission amount of the display unit when the moving body approaching the display device is detected by the sensor unit and the illuminance detection unit detects that the illuminance exceeds a predetermined value. Further, the light emission amount adjusting means does not change the light emission amount when the illuminance detection unit detects that the illuminance falls below a predetermined value even if the moving body approaching the display device is detected by the sensor means.

  In order to achieve the above object, the display device of the present invention includes an illuminance detection unit that detects illuminance, and a moving body that is close to the display device is detected by the sensor means, and the illuminance detected by the illuminance detection unit is When it is determined that the value exceeds a predetermined value, an image is displayed by the display means, and when the illuminance detected by the illuminance detection unit is determined to be lower than a predetermined value, the display And display switching means for prohibiting image display by the means.

  According to this configuration, the display device of the present invention includes the illuminance detection unit that detects the illuminance. When the moving body approaching the display device is detected by the sensor means, and the illuminance detection unit detects that the illuminance exceeds a predetermined value, the display switching means for displaying an image by the display means is provided. The display switching means does not display an image on the display means when the illuminance detection unit detects that the illuminance falls below a predetermined value even when the moving means approaching the display device is detected by the sensor means.

  In order to achieve the above object, in the display device of the present invention, the sensor means detects an infrared sensor that detects infrared rays generated from the moving body, and / or emits light and detects the moving body based on reflected light. An optical sensor and / or an ultrasonic sensor that generates an ultrasonic wave and detects the moving body by a reflected wave thereof, and / or an atmosphere that measures the environmental temperature and detects the moving body based on a change in the environmental temperature It is characterized by detecting the proximity and separation of the moving body using a sensor.

  According to this configuration, the sensor means detects an infrared ray generated from the moving body, an optical sensor that emits light and detects the moving body based on the reflected light, and generates an ultrasonic wave and detects the moving body based on the reflected wave. And an atmospheric sensor that measures the environmental temperature and detects a moving body based on a change in the environmental temperature. The sensor means uses one or more of these sensors to detect the proximity and separation of the moving body.

  According to the present invention, when a moving body approaching the display device, such as a human body, is detected by the sensor means, the light emission amount adjusting means increases the light emission amount of the display means. Further, when it is detected by the sensor means that the moving body is separated, the light emission amount adjusting means reduces the light emission amount of the display means. Accordingly, it is possible to automatically switch so that the image is displayed only when the user is browsing the image in the vicinity of the display device. Further, when the user is not browsing, the amount of light emission is reduced, so that useless power consumption can be reduced.

  Further, according to the present invention, when the moving body is detected by the sensor means, it is determined whether the current time corresponds to the display prohibition time, and if it is, notification using the communication means is performed. Thereby, when a moving body is detected at a time when the user should not browse the display device due to absence, going to bed, or the like, it can be regarded as an illegal intruder and notified. For this reason, since the user can know the intrusion of the illegal intruder even from the outside, for example, the crime prevention function can be improved.

  In addition, according to the present invention, when a moving body is detected after a lapse of a predetermined time after shifting to the display prohibition mode, notification using the communication means is performed. Thereby, when a moving body is detected in a state where the user is set to the display prohibition mode due to absence, sleeping, etc., it can be regarded as an illegal intruder and notified. For this reason, since the user can know the intrusion of the illegal intruder even from the outside, for example, the crime prevention function can be improved. In addition, since detection is performed after a predetermined time has elapsed since the transition to the display prohibition mode, it is possible to prevent the user who has performed the transition operation to the display prohibition mode from being erroneously detected as an illegal intruder.

  Further, according to the present invention, when the notification unit detects a moving object in the display prohibition time or the display prohibition mode, a peripheral image of the display device is captured using a camera or the like and attached to an e-mail to be carried by the user. Send to phone etc. For this reason, the user can know the intrusion of the illegal intruder even from the outside, for example, and can know who is in the vicinity of the display device by the attached image. As a result, information on illegal intruders can be obtained, and whether or not there is a false alarm can be easily determined.

  According to the present invention, when the moving body is detected by the sensor means, if the illuminance exceeds a predetermined value, the light emission amount of the display means is increased, and if the illuminance falls below the predetermined value, the light emission amount is not changed. For this reason, for example, in a dark room or the like, in a situation where it is difficult to estimate that the user has approached the display device for the purpose of browsing the display device, it is possible to prevent the image from being displayed. Thereby, useless power consumption for image display can be reduced.

  According to the invention, when the moving body is detected by the sensor means, the display means is activated if the illuminance exceeds a predetermined value, and the display means is stopped if the illuminance falls below the predetermined value. For this reason, for example, when the user is close to the display device in a dark room or the like, it is possible to prevent the display process itself from being performed in a situation where it is difficult to estimate that the user has approached the display device for the purpose of browsing. Thereby, useless power consumption for starting the display means can be reduced.

  According to the invention, the sensor means detects the moving body using an infrared sensor, an optical sensor, an ultrasonic sensor, an atmospheric sensor, or the like. For this reason, a mobile body can be detected easily and reliably by using an existing sensor.

Embodiments of the present invention will be described below with reference to the drawings. In addition, embodiment shown here is an example and this invention is not limited to embodiment shown here.
<1. Internal configuration>
FIG. 2 is a block diagram showing an internal configuration of the electronic photo frame 1 (= display device) according to the first embodiment of the present invention. The electronic photo frame 1 includes at least a control unit 11, a flash memory 12, an operation unit 13, a display unit 14 (= display unit), a backlight 15 (= display unit), a sensor unit 16 (= sensor unit), and an audio circuit 17. , Speaker 18, communication I / F (Interface) section 19 (= communication means), communication control section 20 (= communication means), power supply section 21, memory slot 22, CCD (Charge Coupled Devices) camera 23 (= imaging means) And a clock circuit 24 (= time measuring means). A memory card 90 that is an external recording medium can be attached to and detached from the memory slot 22.

  The control unit 11 controls each device for performing image display processing in the electronic photo frame 1. Thereby, the display processing of the image recorded in the flash memory 12 and the image input from the outside is controlled in an integrated manner. The control unit 11 is composed of, for example, a plurality of microprocessors. The control unit 11 is a central part that controls each device (for example, the backlight 15 and the like), calculates data, processes, and the like. The details of each functional unit (the transition receiving unit 11a to the notification unit 11e shown in FIG. 1) provided in the control unit 11 will be described later.

  The flash memory 12 is a medium for temporarily recording various data held by the electronic photo frame 1. The flash memory 12 is, for example, processing data when various types of information processing are performed by the control unit 11, image data to be displayed on the display unit 14, message data for outputting a voice message or text message, a telephone number or an e-mail. Has the role of recording personal data such as addresses.

  The operation unit 13 is used by the user to give various instructions to the electronic photo frame 1 such as an image switching instruction and a user information input instruction. The instruction input by the operation unit 13 is received by the control unit 11, and various control processes are performed based on the content of the instruction. For example, the operation unit 13 can accept a user operation using a plurality of operation buttons or a touch panel member included in the display unit 14.

  The display unit 14 is an LCD (Liquid Crystal Display) module including a liquid crystal panel and a driver, and includes a backlight 15 behind it. The backlight 15 is a light emitting device disposed on the back side of the liquid crystal panel. As the backlight 15, for example, an edge light system using a cold cathode tube as a light source or a direct type system in which fluorescent lamps are arranged on the back surface of a liquid crystal panel is used. The light emission amount of the light source of the backlight 15 is adjusted by a light emission amount adjustment unit 11c described later. The display unit 14 includes operation receiving members such as a touch panel member, and operations received by these members can be given to the operation unit 13.

  The sensor unit 16 includes a moving body sensor that detects a moving body that exists in the vicinity of the electronic photo frame. Examples of the moving body sensor include an infrared sensor that detects infrared rays generated from the human body, an optical sensor that generates laser light, LED (light emitting diode) light, etc., and detects the proximity of the moving body by reflected light, and generates ultrasonic waves. It is possible to use an ultrasonic sensor that senses the proximity of the moving body by the reflected wave, an atmospheric sensor that detects a human body by measuring a change in the temperature of the atmosphere, and the like. The sensor unit 16 is also configured to include an illuminance sensor (= illuminance detection unit) that detects ambient brightness.

  The audio circuit 17 performs D / A conversion and amplification of the audio signal supplied from the control unit 11 and outputs it from the speaker 18. At this time, the output volume can be changed by adjusting the gain of the amplifier.

  The communication I / F unit 19 is a physical interface for connecting the electronic photo frame 1 to a communication network. The communication I / F unit includes, for example, a LAN cable connector for connecting to a wired LAN compliant with the IEEE 802.3 standard, a wireless antenna for connecting to a wireless LAN compliant with the IEEE 802.11 standard, and the like. In addition, as an input interface for inputting image data, a serial cable connection socket or an infrared element (IrDA) for infrared communication may be provided.

  The communication control unit 20 performs communication control for performing mutual communication with an external device connected by the communication I / F unit 19 such as a mail server or a mobile phone. This makes it possible to send and receive e-mails and receive images taken with an external mobile phone. When the communication I / F unit 19 includes a wireless antenna, it also has a role of controlling wireless communication via the wireless communication network.

  The power supply unit 21 is supplied with electric power from an external power supply (not shown), and supplies a power supply voltage to each part of the electronic photo frame 1. The power supply unit 21 includes a connection terminal (power supply cord connection terminal 21a shown in FIG. 5) for connecting a power supply cord for receiving power supply from an external power supply. This connection terminal is provided on the back side of the electronic photo frame 1 or the like.

  Alternatively, the power source unit 21 may be configured such that the electronic photo frame 1 can be driven while being disconnected from the external power source by using a dry battery or a secondary battery as a power source. As the secondary battery, for example, a rechargeable alkaline battery or a lithium ion battery can be used.

  The memory slot 22 is an interface for connecting an external recording medium such as an SD memory card 90 and transmitting information. For example, still images and moving images taken with a digital camera are recorded on the SD memory card 90. The memory slot 22 copies these data to the flash memory 12 according to an instruction from the control unit 11. Thereby, an image input from the outside can be displayed on the display unit 14.

  The CCD camera 23 is a photographing unit using a CCD as an image pickup device. The CCD photoelectrically converts a light image (optical information) of a subject formed by a photographing lens unit (not shown) into image data of R (red), G (green), and B (blue) color components and outputs the image data. . The CCD is driven by a timing generator (not shown) to control, for example, the aperture and exposure time. Image data obtained by the CCD camera 23 is recorded in the flash memory 12.

The clock circuit 24 is a clock circuit for constantly counting the current time. For example, the clock circuit 24 notifies the user of the current time, and determines whether the current time corresponds to an image display prohibition time by the notification unit 11e described later. It is used when performing.
<2. About the configuration of the function section>
Here, the relationship between the functional units for performing the light emission amount adjustment process and the notification process of the electronic photo frame 1 according to the embodiment of the present invention will be described with reference to the functional block diagram of FIG.

  As shown in FIG. 1, the light emission amount adjustment process and the notification process of the present invention include at least a transition reception unit 11a, a time reception unit 11b, a light emission amount adjustment unit 11c, a display switching unit 11d, and a notification unit 11e included in the control unit 11. The flash memory 12, the operation unit 13, the display unit 14, the backlight 15, the sensor unit 16, the communication control unit 20, the CCD camera 23, and the clock circuit 24 are realized.

  The transition accepting unit 11a accepts a transition instruction for switching between a mode in which no image is displayed using the display unit 14 (hereinafter referred to as “display prohibition mode”) and a normal mode. The migration instruction is issued, for example, by a user operation by the operation unit 13 or the like. The transition receiving unit 11a that has received the instruction to shift to the display prohibition mode instructs the display switching unit 11d to shift the display mode and rewrites the operation mode information recorded in the flash memory 12. The operation mode information includes at least information indicating the designated operation mode and the date and time when the designation was performed.

  Note that the display prohibition mode is used in a situation where it is estimated that there is no person browsing the electronic photo frame 1, for example, when the user is away from home. In the display prohibition mode, unlike the power supply stop state, the power supply of the electronic photo frame 1 is driven. Therefore, it is possible to perform detection processing of a moving body by various function units described later, notification processing at the time of detection, and the like.

  The time accepting unit 11b accepts designation of a time when no image is displayed on the display unit 14 (hereinafter referred to as “display prohibited time”). The instruction of the display prohibition time is performed, for example, by receiving an input of a display prohibition start time and a display prohibition end time by a user operation by the operation unit 13 or the like. Upon receipt of this instruction, the time reception unit 11b records display prohibition time information indicating the designated display prohibition time in the flash memory 12.

  The light emission amount adjusting unit 11 c adjusts the light emission amount of the backlight 15 based on the detection result of the mobile sensor included in the sensor unit 16. Specifically, when a nearby moving body such as an image viewer is detected by a moving body sensor such as an infrared sensor, the light emission amount is increased to a predetermined value. In addition, when the moving body in the vicinity is separated and cannot be detected, the light emission amount is reduced to a predetermined value.

  In addition, when the mobile body sensor with which the sensor part 16 is provided can measure the distance with a mobile body, the form which changes a light emission amount in steps according to distance may be sufficient. However, in the display prohibition mode or when it is a time corresponding to the display prohibition time, the amount of light emission is not changed even if the proximity or separation of the moving object is detected. Thereby, for example, in a situation where the user does not browse the electronic photo frame 1 such as a room without light at night, power consumption can be reduced.

  The display switching unit 11d instructs the display unit 14 to switch display / stop of images. For example, the display switching unit 11d instructs the display unit 14 to stop the display when the transition receiving unit 11a detects the transition instruction to the display prohibition mode. The display switching unit 11d can also instruct the display to be stopped in a state where the moving body sensor included in the sensor unit 16 detects that the moving body is not present in the vicinity. In addition, the display switching unit 11d detects, when the illuminance sensor included in the sensor unit 16 detects that the ambient brightness is lower than a predetermined value, or the clock circuit 24 that a predetermined time has arrived. In some cases, it is possible to give an instruction to stop the display.

  The notification unit 11e determines, based on the operation mode information recorded in the flash memory 12, whether the current mode corresponds to the display prohibition mode when a moving body is detected by the moving body sensor included in the sensor unit 16. . In addition, the current time is acquired using the clock circuit 24, and it is determined whether or not the acquired time corresponds to the display prohibition time indicated by the display prohibition time information recorded in the flash memory 12. For example, when the display prohibition time is designated from 12:00 to 18:00 and the current time is 15:00, this is applicable.

As a result of the above determination, when any one of the conditions is met, the notification unit 11e uses the communication control unit 15 to perform a mobile body detection notification process on an external communication device. The notification process is performed, for example, by creating a standard text mail from document data pre-recorded in the flash memory 12 and transmitting it to a predetermined mail address. At this time, the notification unit 11e captures a peripheral image of the electronic photo frame 1 using the CCD camera 23, and transmits the captured image as attached data of an e-mail. Alternatively, the voice message recorded in advance in the flash memory 12 may be used to transmit a voice message to a mobile phone, an IP phone, or the like.
<3. Appearance of electronic photo frame>
Here, the external appearance of the electronic photo frame 1 according to the first embodiment of the present invention will be described with reference to the front view of FIG. 3, the top view of FIG. 4, and the rear view of FIG.

  FIG. 3 is a front view showing an example of each device unit provided on the front surface of the electronic photo frame 1. As shown in FIG. 3, the front surface of the electronic photo frame 1 is configured to include a display unit 14, an optical sensor 16 a included in the sensor unit 16, and a CCD camera 23. FIG. 4 is a top view illustrating an example of each device unit provided on the top surface of the electronic photo frame 1. As shown in FIG. 4, the upper surface of the electronic photo frame 1 includes a memory slot 22.

  As shown in FIGS. 3 and 4, the electronic photo frame 1 of the present embodiment has its left and right end portions 1b inclined forward by a predetermined angle with respect to the main body portion 1a. Thereby, the optical sensor unit 16 a provided at the left and right end portions 1 b intersects the emitted light 81 in the vicinity of the front portion of the electronic photo frame 1. As a result, the moving body can be detected by observing the reflected light 82 reflected by the moving body approaching and separating from the front of the electronic photo frame 1.

  The electronic photo frame 1 is provided with a CCD camera 23 on the front surface thereof. For this reason, when it is determined that the optical sensor 16a detects the moving body and the notification unit 11e needs to notify the intruder detection, the moving body existing in front of the electronic photo frame 1 is imaged. Can be transmitted to an external communication device.

  FIG. 5 is a rear view showing an example of each device unit provided on the back surface of the electronic photo frame 1. As shown in FIG. 5, the back surface of the electronic photo frame 1 includes a LAN connector 19 a included in the communication I / F unit 19, a power cord connection terminal 21 a included in the power source unit 21, and a support leg 25. The LAN connector 19a is a terminal for connecting the electronic photo frame 1 to a network by connecting a LAN cable. The power cord connecting terminal 21a is for attaching a power cord (not shown) and receiving power from a commercial power source.

The support leg 25 is a member that is rotatably provided on the main body 1a and that instructs the main body 1a from behind. The support leg 25 has a configuration in which the inclination of the surface of the main body 1a can be made steep or gentle, or can be appropriately adjusted. Further, the support leg 25 can be rotated to change the vertical direction of the main body 1a.
<4. About light emission amount adjustment processing and notification processing>
Here, the light emission amount adjustment process and the notification process of the electronic photo frame 1 according to the embodiment of the present invention will be described with reference to the block diagrams of FIGS. 1 to 5 and the flowchart of FIG.

  FIG. 6 is a flowchart showing a processing flow of the light emission amount adjustment processing and notification processing according to the present invention. This process can be started at an arbitrary timing while the power source of the electronic photo frame 1 is activated.

  After the start of this process, the notification unit 11e determines whether the proximity of the moving body is detected by the optical sensor 16a included in the sensor unit 16 in step S110. Since the optical sensor 16a is provided on the front surface of the electronic photo frame 1 as shown in FIG. 4, for example, when the user stands in front of the electronic photo frame 1 to view the image on the display unit 14 or the like. , Proximity is detected.

  When the proximity of the moving body is not detected, the process proceeds again to step S110. When the proximity of the moving object is detected, in step S120, the notification unit 11e determines whether the current operation mode is the display prohibition mode and whether a predetermined time has elapsed since the transition to the display prohibition mode. . For example, the operation mode is determined by referring to the operation mode information recorded in the flash memory 12. The operation mode information is recorded in the flash memory 12 based on the operation mode transition instruction received in advance by the transition reception unit 11a.

  When it is determined that the current operation mode is the display prohibition mode, the process proceeds to step S190 described later. When it is determined that the display prohibition mode is not set, the notification unit 11e acquires the current time using the clock circuit 24 in step S130. Further, in step S140, the notification unit 11e determines whether or not the acquired current time corresponds to the display prohibition time.

  The determination as to whether or not the display prohibition time is applicable is made by referring to the display prohibition time information recorded in the flash memory 12, for example. The display prohibition time information is recorded in the flash memory 12 based on the display prohibition time received in advance by the time receiving unit 11b.

  When it is determined that the current time corresponds to the display prohibition time, the process proceeds to step S190 described later. When it is determined that the display prohibition time is not satisfied, the light emission amount adjustment unit 11c determines whether or not the ambient illuminance exceeds a predetermined value by using an illuminance sensor included in the sensor unit 16 in step S150. .

  When it is determined that the predetermined value is not exceeded, the process proceeds to step S110 again. If it exceeds the predetermined value, the light emission amount adjusting unit 11c gives an instruction to increase the light emission amount to the backlight 15 in step S160. Thereby, the light emission amount of the backlight 15 is increased to a level at which the image on the display unit 14 can be visually recognized.

  Next, in step S170, the notification unit 11e determines whether or not separation of the moving body is detected by the optical sensor 16a included in the sensor unit 16. For example, separation is detected when the user leaves the front of the electronic photo frame 1 because the user has finished viewing the image on the display unit 14.

  If separation of the moving body is not detected, the process proceeds to step S170 again, and monitoring is continued until separation is detected. When the separation is detected, the light emission amount adjusting unit 11c gives an instruction to reduce the light emission amount to the backlight 15 in step S180. Thereafter, the process proceeds to step S110 again, and the change in illuminance and the detection of the moving body are continuously monitored.

  Returning the description to step S120 and step S140, if it is determined in step S120 that the display prohibit mode is selected, or if it is determined in step S140 that the display non-display time is satisfied, the notification unit 11e determines in step S190 that the CCD camera 23 is imaged. Note that the number of images to be captured can be changed as appropriate without departing from the spirit of the present invention.

  The CCD camera 23 is provided on the front surface of the electronic photo frame 1 as shown in FIG. For this reason, when a malicious third party, for example, a trespasser, approaches the front of the electronic photo frame 1, an image of the trespasser can be taken. Next, the alerting | reporting part 11e produces the fixed text mail for alert | reporting a mobile body detection in step S200. Note that the fixed sentence data and destination address information necessary for creating the fixed sentence mail are recorded in the flash memory 12 in advance.

  Next, in step S210, the notification unit 11e generates an image-attached mail by attaching the captured image data to the created standard text mail. Then, the image attachment mail is transmitted to an external communication device such as a mobile phone or a personal computer using the communication control unit 20, and then the present process is terminated. When a moving body is detected in the display prohibition mode or the display prohibition time, the backlight dimming process is not performed even if the moving body comes close to the electronic photo frame 1.

  According to the present embodiment described above, the light emission amount of the backlight 15 is automatically reduced when the user is not browsing the image on the display unit 14 in the vicinity of the electronic photo frame 1. Even when the user is present in the vicinity, the amount of light emission is reduced in a situation where the illuminance is low due to, for example, the lighting equipment in the room not being lit or the like, and is estimated to be unsuitable for image browsing. Thereby, useless power consumption can be suppressed.

In addition, according to the present embodiment, when a moving body is detected in the display prohibition mode in which the user does not browse the electronic photo frame 1 or in the non-display time, it is regarded as an illegal intruder and an image attachment mail is transmitted. . For this reason, since the user of a remote place can also confirm the presence and appearance of an illegal intruder, the crime prevention performance can be improved. Further, when the intruder is in the vicinity of the electronic photo frame 1, the backlight dimming process is not performed, thereby making the electronic photo frame 1 inconspicuous from the intruder and preventing the notification process from being obstructed. Can do.
[Other embodiments]
The present invention has been described with reference to the preferred embodiments and examples. However, the present invention is not necessarily limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea. be able to.

  Therefore, the present invention can also be applied to the following embodiments.

  (A) In the present embodiment, the electronic photo frame 1 is described as an example of a display device that performs the light emission amount adjustment process and the notification process. However, the present invention may be used in other apparatuses including a display unit. Good. For example, it may be used in a car navigation system, a portable television, a PC monitor, or the like.

  (B) In the present embodiment, notification is performed when a moving body is detected in the display prohibition mode or in the non-display time, but notification may be performed only in one of these cases, and display prohibition is also possible. The notification may be performed only when both the mode and the non-display time are satisfied. Moreover, the form which can be suitably changed with a user operation may be sufficient as said several form.

  (C) In this embodiment, the amount of light emitted from the backlight is reduced when the moving object is not present in the vicinity of the electronic photo frame 1 and when the illuminance is low even though the moving object is present in the vicinity. In this case, the display switching unit 11d may give a display stop instruction to the display unit 14 and give a light emission stop instruction to the backlight 15 so that the image is not displayed. Thereby, power consumption can be further reduced.

  (D) In this embodiment, various functional units of the electronic photo frame 1 related to the light emission amount adjustment process and the notification process of the present invention are realized by executing a program on an arithmetic processing unit such as a microprocessor. However, various functional units may be realized by a plurality of circuits.

These are functional block diagrams which show the structure of the function part with which the display apparatus of this invention is provided. These are block diagrams which show the internal structure of the display apparatus of this invention. These are the front views which show the external appearance of the display apparatus of this invention. These are top views which show the external appearance of the display apparatus of this invention. These are the rear views which show the external appearance of the display apparatus of this invention. These are the flowcharts which show the processing flow of the light emission amount adjustment process of this invention, and alerting | reporting process.

Explanation of symbols

1 Electronic photo frame (display device)
11 Control unit 11a Transition acceptance unit (migration acceptance means)
11b Time reception unit (time reception means)
11c Light emission amount adjusting unit (light emission amount adjusting means)
11d Display switching unit (display switching means)
11e Notification part (notification means)
14 Display section (display means)
15 Backlight (display means)
16 Sensor unit (sensor means, illuminance detection unit)
19 Communication I / F part (communication means)
20 Communication control unit (communication means)
23 CCD camera (imaging means)
24 Clock circuit (time measuring means)

Claims (6)

Display means for displaying an image;
A light emission amount adjusting means for adjusting the light emission amount of the display means;
Sensor means for detecting the proximity and separation of the moving body;
A time measuring means for measuring time;
A communication means for connecting to a communication network and communicating with an external communication device;
Time accepting means for accepting designation of a display prohibition time indicating a time at which image display by the display means is prohibited;
A display device comprising a notification means ,
When a moving object close to the display device is detected by the sensor unit, the time is acquired using the time measuring unit, and the acquired time corresponds to the display prohibition time received in advance by the time receiving unit. When the display prohibition time is satisfied, the notification unit transmits the notification information indicating the detection of the moving body to the external communication device using the communication unit and acquires the notification information. If the time does not correspond to the prohibited time, the light emission amount adjusting means increases the light emission amount of the display means,
The display device, wherein the light emission amount adjusting means reduces the light emission amount of the display means when separation of the moving body is detected by the sensor means. A transition accepting unit for accepting an instruction to shift to a display prohibition mode, which is an operation mode for prohibiting image display by the display unit, and when the notification unit detects the moving body by the sensor unit, Based on the display prohibition mode, it is determined whether a predetermined time has elapsed, and when it has elapsed, the notification information is transmitted to the external communication device using the communication means. The display device according to claim 1 , wherein the display device transmits the display device. An imaging means, said notifying means, in carrying out transmission of the broadcast information, captured a peripheral image of the display device by the imaging means, predetermined by adding the peripheral image to the electronic mail the external display device according to claim 1 or claim 2, characterized in that transmitted to the communication device. When an illuminance detection unit that detects illuminance is provided, a moving body that is close to the display device is detected by the sensor means, and the illuminance detected by the illuminance detection unit is determined to exceed a predetermined value. The light emission amount adjusting means increases the light emission amount of the display means, and when it is determined that the illuminance detected by the illuminance detection unit is lower than a predetermined value, the light emission amount adjustment means is the display means. The display device according to any one of claims 1 to 3 , wherein the light emission amount is not changed. When it is determined that an illuminance detection unit that detects illuminance and a moving body that is close to the display device are detected by the sensor means, and the illuminance detected by the illuminance detection unit exceeds a predetermined value, Display switching means for displaying an image by the display means, and prohibiting display of the image by the display means when it is determined that the illuminance detected by the illuminance detection unit is lower than a predetermined value. display device according to any one of claims 1 to 3, characterized in that it comprises. The sensor means detects an infrared ray generated from the moving body, and / or an optical sensor that emits light and detects the moving body by reflected light, and / or generates an ultrasonic wave and reflects it. The proximity and separation of the moving body is detected using an ultrasonic sensor that detects the moving body by waves and / or an atmospheric sensor that measures the environmental temperature and detects the moving body based on a change in the environmental temperature. display device according to any one of claims 1 to 5, characterized in that.

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