KR20140040430A - Apparatus for controlling reflectance of room mirror and the room mirror including this - Google Patents

Apparatus for controlling reflectance of room mirror and the room mirror including this Download PDF

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Publication number
KR20140040430A
KR20140040430A KR1020120107053A KR20120107053A KR20140040430A KR 20140040430 A KR20140040430 A KR 20140040430A KR 1020120107053 A KR1020120107053 A KR 1020120107053A KR 20120107053 A KR20120107053 A KR 20120107053A KR 20140040430 A KR20140040430 A KR 20140040430A
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KR
South Korea
Prior art keywords
ecm
rearview mirror
detection
value
range
Prior art date
Application number
KR1020120107053A
Other languages
Korean (ko)
Inventor
박승룡
Original Assignee
엘지이노텍 주식회사
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Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020120107053A priority Critical patent/KR20140040430A/en
Publication of KR20140040430A publication Critical patent/KR20140040430A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
    • B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
    • B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/04—Rear-view mirror arrangements mounted inside vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/12—Mirror assemblies combined with other articles, e.g. clocks
    • B60R2001/1223—Mirror assemblies combined with other articles, e.g. clocks with sensors or transducers

Abstract

The present invention provides a device for controlling the reflectivity of a rear view mirror and a rear view mirror including the same. The device for controlling the reflectivity of a rear view mirror according to one embodiment of the present invention includes an ECM module which changes the reflectivity of a rear view mirror, a photosensor which outputs a first sensing value detected in a first sensing range and a second sensing value detected in a second sensing range, and an ECM control unit which receiving the first and second sensing values from the photosensor and controls the enable of the ECM module according to the combination of the first sensing value and the second sensing value.

Description

Apparatus for controlling reflectance of room mirror and the room mirror including this}

The present invention relates to a rearview mirror reflectance control apparatus and a rearview mirror including the same.

In general, when driving a vehicle at night, when the headlights of a vehicle that comes from the rear shine through the interior room mirror of the vehicle in front of the vehicle, the driver of the vehicle in front of the vehicle is obstructed, especially when the rear vehicle operates an upward light. The driver of the vehicle ahead acts as a factor that disturbs safe driving with severe discomfort.

Therefore, in order to solve such inconveniences, smart mirrors such as room mirrors that automatically adjust reflectivity of mirror surfaces using ECM (Electro Chromic Mirror) technology or liquid crystal display (LCD) have recently appeared. It is used to prevent glare from the driver.

The car ECM, the light reflectance is automatically adjusted to the mirror surface in accordance with the ambient conditions of the vehicle, in particular, the sensor inside the room mirror automatically detects the lights of the rear vehicle during night driving, to prevent absorption and glare, thereby ensuring a safe watch It is secured.

The ECM technology of such a vehicle is commercially applied to a rear mirror (Room Mirror or Rearview Mirror) or a side mirror of a vehicle, and the basic structure of such a technique is shown in FIG. 1. And a glare sensor 10 for detecting the degree of glare disposed on the mirror surface portion of the rear reflector 1 and an ambient light sensor 20 formed on the opposite side of the mirror surface of the rear reflector 1. have.

That is, the rear reflector of the vehicle is usually mounted inside or outside the rear reflector and disposed in the first direction A, which is the traveling direction of the vehicle, and detects ambient light and senses the degree of day or night by sensing ambient light. The amount of light is detected through the detection sensor 20 and transferred to the ECM control circuit.

In addition, the glare sensor 10 for detecting light coming from the second direction B, which is a direction opposite to the traveling direction of the vehicle, from the rear reflector of the vehicle, is determined by the ambient light sensor 20 at night. The amount of light sensed by the glare sensor 10 is detected and transmitted to the ECM control circuit to automatically adjust the reflectance of the mirror surface. Such a rearview mirror for a vehicle is disclosed in Korean Laid-Open Patent Publication No. 10-2011-0078721.

However, as shown in the illustrated structure, the sensor for implementing the existing ECM is a structure in which the ambient light sensor and the glare sensor are separated and mounted inside the rear reflector, and thus have a limited position in the design. The size of the circuit boards and sensors that mount the military is limiting the size of the rearview mirror itself.

Korean Laid-Open Patent Publication 10-2011-0078721

The present invention has been made to solve the above-described problem, an object of the present invention is to provide a rearview mirror reflectance control device and a rearview mirror including the same that can improve the structure simplification and efficiency.

An apparatus for controlling a rearview mirror reflectance according to an embodiment of the present invention for solving the above-described problem includes: an ECM module for changing a reflectance of a rearview mirror: a first sensing value detected in one sensing range and a second sensing sensed in a second sensing range One photo sensor for outputting a value; And an ECM controller configured to receive first and second sensed values from the photosensor and control the enabling of the ECM module according to a combination of the first sensed value and the second sensed value.

The ECM controller may determine whether the second sensed value is greater than the first sensed value by a predetermined size if the first sensed value is greater than a predetermined first threshold value, and if so, enable the ECM module. .

The ECM controller may determine whether the second sensed value is greater than a predetermined second threshold if the first sensed value is less than or equal to a predetermined first threshold, and if so, enable the ECM module.

The photo sensor may detect light intensity and light direction.

The second detection range may correspond to a range of 90 degrees ± 10-20 degrees with respect to the front of the rearview mirror.

The first detection range may correspond to a range excluding the second detection range in a range of 180 degrees corresponding to the front of the rearview mirror.

The first detected value may indicate whether the current time is day or night.

The second detection value may indicate a degree of glare.

The ECM control unit may be implemented by being integrated into the ECM module.

In addition, the reflector according to the embodiment of the present invention includes a rearview mirror reflectance control device.

As described above, according to the present invention, since the activation of the ECM module can be controlled using one photo sensor, unlike the conventional structure of controlling the ECM by using two or more optical sensors, one By using the photo sensor, it is possible to control the ECM technology through the detection of ambient light and glare detection, which can be easily installed anywhere inside or outside the rearview mirror and simplify the structure.

1 is a view for explaining the structure of a rearview mirror of a conventional vehicle.
2 is a view for explaining the structure of the rearview mirror of the vehicle according to the present invention.
3 is a view for explaining the detection range of the photo sensor according to an embodiment of the present invention.
4 is a block diagram of a rearview mirror reflectance control apparatus according to an embodiment of the present invention.
5 is a flowchart illustrating the operation of an ECM control unit according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention. In addition, the size of each component in the drawings may be exaggerated for the sake of explanation and does not mean a size actually applied.

2 is a view for explaining the structure of the rearview mirror of the vehicle according to the present invention, Figure 3 is a view for explaining the detection range of the photo sensor according to an embodiment of the present invention.

Referring to FIG. 2, the rearview mirror 100 of the vehicle according to the present invention includes one photo sensor 110. In the prior art, the rearview mirror provided with two photosensors, but the rearview mirror 100 according to the present invention includes one photosensor 110, that is, a single sensor 110.

The photo sensor 110 is disposed on the mirror surface 102 portion of the rearview mirror 100. On the opposite side 104 of the mirror surface 102 of the rearview mirror 10, a photo sensor is not installed unlike the prior art. The photo sensor 110 detects the amount of light and outputs it to the ECM control unit (not shown).

Referring to FIG. 3, the photo sensor 110 may detect not only light intensity but also light direction. In detail, the photo sensor 110 outputs a first detection value detected in the first detection range and a second detection value detected in the second detection range.

The first detection range is indicated with reference E in FIG. 2. The second detection range is indicated by reference F in FIG. 2. The second detection range corresponds to a range of approximately 90 degrees ± 10-20 degrees with respect to the front of the rearview mirror. The front surface of the rearview mirror refers to the surface where the mirror is located, that is, the mirror surface. The first sensing range corresponds to a range excluding the second sensing range from a range of 180 degrees corresponding to the front of the rearview mirror. The first detection range is an area in which a detection value corresponding to a photo sensor that detects a degree of glare is disposed on a mirror surface of a conventional rearview mirror. The second detection range is an area in which a detection value corresponding to the photo sensor which is disposed opposite to the mirror surface of the conventional rearview mirror and detects ambient light is sensed. Thus, the first detection value indicates whether the current time is day or night, and the second detection value indicates the degree of glare.

As shown in FIG. 3, the second sensing range F is much smaller than the first sensing range E. FIG. At night driving, the light of the rear vehicle is approximately reflected in the second detection range F. FIG. Therefore, the present invention may control the enable of the ECM module by using the first detection value detected in the first detection range E and the second detection value detected in the second detection range F when driving at night. When the ECM module is enabled, the ECM module operates to change the reflectance of the mirror.

The photo sensor 110 outputs the sensed sensing values to the ECM controller, and the ECM controller controls the activation of the ECM module, which will be described in detail below.

4 is a block diagram of a rearview mirror reflectance control apparatus according to an embodiment of the present invention.

The rearview mirror reflectance controller includes a photo sensor 110, an ECM controller 120, and an ECM module 130.

As described above, the photo sensor 110 detects not only the intensity of the light but also the direction of the light. The photo sensor 110 outputs a first detection value detected in the first detection range and a second detection value detected in the second detection range.

The ECM control unit 120 controls the enabling or activation of the ECM module 130 according to the difference between the first detection value and the second detection value measured by the photo sensor 110. The ECM module 130 is a device that changes the reflectance of the mirror by using oxidation and reduction reactions of electrochromic (EC) devices.

An electrochromic device is a device using a phenomenon in which the light transmittance of an electrochromic material is changed by an electrochemical redox reaction, and is used for controlling light transmittance or reflectivity of a building window glass or an automobile mirror. Recently, as it is known that not only the color change in the visible light range but also the infrared ray blocking effect has been attracting much attention for its application as an energy-saving product.

In other words, the ECM module 40 is provided with a thin film of the EC element in the mirror to change the amount of coloring of the EC element, thereby suppressing glare by the headlights of the rear vehicle by changing the reflectance of the mirror.

The ECM control unit 120 receives the first detection value and the second detection value from the photo sensor 110 and activates or activates the ECM module 40 according to the difference between the first detection value and the second detection value. Can be controlled. The ECM control unit 120 may be integrated into the ECM module 130 and implemented.

Hereinafter, the operation of the ECM control unit 120 will be described with reference to FIG. 5.

5 is a flowchart illustrating the operation of an ECM control unit according to an embodiment of the present invention.

Referring to FIG. 5, the ECM controller 120 determines whether to receive detection values, that is, a first detection value and a second detection value, from the photo sensor 110 in step 310. When the ECM controller 120 receives the detection values from the photo sensor 110, the ECM controller 120 determines whether the first detection value is greater than the first threshold value in step 320. The first detection value represents the amount of light detected from the first detection range. The first detection range is a range for detecting an amount of light indicating whether it is night or day. Thus, if the first detected value is greater than the first predetermined threshold, the current time is in the daytime zone, and if it is lower than the first threshold, the current time is the night time zone. If the current time is during the day, it is not necessary to activate the ECM module 130. Conventionally, when the amount of light detected by the photo sensor for detecting day and night indicates that the current time is low, the ECM module is not operated. The present invention is configured to activate or enable the ECM module 130 in the event that sunlight shines from behind the vehicle at low altitude even when the current time is low.

Therefore, even if the first detection value indicates that the current time is low, the ECM control unit 120 proceeds to step 340 to determine whether the second detection value is larger by a predetermined size than the first detection value. Accordingly, when the current time is low, when the amount of light larger than the first detection value is detected in the second detection range, the ECM control unit 120 enables the ECM module 130.

Meanwhile, if the first detection value is less than or equal to the first threshold value, the ECM controller 120 determines whether the second detection value is greater than the second threshold value in step 340.

The second detection range is a range for determining whether light shines from the rear vehicle. Thus, when the current time is night, the vehicle illuminates the rear when the second detected value is greater than the second predetermined threshold. Therefore, if the second detection value is greater than the second threshold, the ECM control unit 120 proceeds to step 350 to activate or enable the ECM module 130.

The operation of the ECM control unit may be shown in Table 1 below.


Condition Case 1 Case 2 Case 3 Case 4 Case 5 Case 6 day night Night + rear light Night + rear light Day + rear sun Night + front light + rear light E River about about River River about F River about River about Keukgang River ECM Module Behavior X X O X O O

In Table 1, the enable state is indicated by O and the disable state is indicated by X in the operation of the ECM module. If ECM module is disabled, it means that it does not work. As shown in Table 1, when the current time is low, even if the first detection value of the E range exceeds the first threshold value, the ECM module 130 is activated or turned on when sunlight is shining from behind the vehicle at a low altitude. Configured to enable.

The rearview mirror of the present invention includes a rearview mirror reflectance control apparatus as described above.

As described above, according to the present invention, since the activation of the ECM module can be controlled using one photo sensor, unlike the conventional structure of controlling the ECM by using two or more optical sensors, one By using the photo sensor, it is possible to control the ECM technology through the detection of ambient light and glare detection, which can be easily installed anywhere inside or outside the rearview mirror and simplify the structure.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical spirit of the present invention should not be limited to the above-described embodiments of the present invention, but should be determined by the claims and equivalents thereof.

110: photo sensor
120: ECM control unit
130: ECM Module

Claims (10)

In the rearview mirror reflectance controller,
ECM modules that change the reflectance of the rearview mirror:
A photo sensor for outputting a first detection value detected in the first detection range and a second detection value detected in the second detection range; And
And an ECM controller configured to receive first and second sensed values from the photosensor and control the enable of the ECM module according to a combination of the first sensed value and the second sensed value.
The method according to claim 1,
The ECM control unit determines whether the second detection value is larger than the first detection value by a predetermined size when the first detection value is larger than a predetermined first threshold value, and if so, a rearview mirror reflectance that enables the ECM module. Control unit.
. The method according to claim 1,
The ECM controller determines whether the second sensed value is greater than a predetermined second threshold value if the first sensed value is less than or equal to a predetermined first threshold value, and if so, a rearview mirror reflectance control that enables the ECM module. Device.
The method according to claim 1,
The photo sensor is a rearview mirror reflectance control device for detecting the intensity and direction of light.
The method according to claim 1,
And the second sensing range corresponds to a range of 90 degrees ± 10-20 degrees with respect to the front of the rearview mirror.
The method of claim 5,
And the first detection range corresponds to a range excluding the second detection range in a range of 180 degrees corresponding to the front of the rearview mirror.
The method according to claim 1,
And the first detection value indicates whether the current time is day or night.
The method according to claim 1,
And the second detected value indicates a degree of glare.
The method according to claim 1,
The ECM control unit is a rearview mirror reflectance control device that is integrated into the ECM module.
A reflector comprising the rearview mirror reflectance control device of any one of claims 1 to 9.
KR1020120107053A 2012-09-26 2012-09-26 Apparatus for controlling reflectance of room mirror and the room mirror including this KR20140040430A (en)

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Application Number Priority Date Filing Date Title
KR1020120107053A KR20140040430A (en) 2012-09-26 2012-09-26 Apparatus for controlling reflectance of room mirror and the room mirror including this

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120107053A KR20140040430A (en) 2012-09-26 2012-09-26 Apparatus for controlling reflectance of room mirror and the room mirror including this

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113448115A (en) * 2020-03-27 2021-09-28 松下知识产权经营株式会社 Display device and control circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113448115A (en) * 2020-03-27 2021-09-28 松下知识产权经营株式会社 Display device and control circuit
CN113448115B (en) * 2020-03-27 2024-03-05 松下知识产权经营株式会社 Display device and control circuit
US11945369B2 (en) 2020-03-27 2024-04-02 Panasonic Intellectual Property Management Co., Ltd. Display device and control circuit

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