JP2019043252A - Lighting fixture for vehicle - Google Patents

Abstract

To provide a lighting fixture for a vehicle that can suppress degradation in a light source.SOLUTION: A lighting fixture for a vehicle includes: a display 2 including marker lamp lighting areas 21A, 21B where marker lamps light and marker lamp non-lighting areas 22A, 22B that are different from the marker lamp lighting areas 21A, 21B, where the marker lamps do not light; and a control part 3 for switching between at least part of the marker lamp lighting areas 21A, 21B and at least part of the marker lamp non-lighting areas 22A, 22B.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle lamp, and more particularly to a vehicle lamp in which deterioration of a light source can be suppressed.

  It is necessary to turn on a stop lamp, a turn signal lamp and the like provided in a car, day and night. In order to make these marker lamps stand out, especially even in the daytime when the surroundings are bright, it is necessary to increase the brightness of the marker lamps to some extent. By the way, various things are currently used as a light source of a marker lamp, and using an organic light emitting diode (OLED) as a light source of a marker lamp is described in the following patent document 1.

JP, 2015-5552, A

  Stoplights, turn signal lamps, and other indicator lights are equipment defined by laws and regulations, and are indispensable equipment when using cars. Therefore, it is desirable to save the effort of maintenance of a marker lamp by using a marker lamp as long as possible. However, as described above, since the marker lamp is used day and night, and the brightness of the marker lamp needs to be increased to some extent, the long-term use of the marker lamp tends to deteriorate the light source of the marker lamp. When an OLED is used as a light source like the marker lamp described in Patent Document 1 above, there is a concern that the deterioration of the light source is particularly likely to be advanced by lighting the light source in an environment where the ambient temperature is high such as daytime .

  Then, an object of this invention is to provide the vehicle lamp which can suppress deterioration of a light source.

  A vehicle lamp according to the present invention for solving the above problems is a marker lamp lighting area in which a marker lamp is lit and an area different from the marker lamp lighting area, wherein the marker lamp is not lit. And a control unit configured to switch between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area.

  In the present specification, the “marker light” is a light that emits light toward the outside of the vehicle, and it is determined that the vehicle is provided with a law like a tail lamp, stop lamp, turn signal lamp, back lamp, etc. It means the light excluding the headlamp among the lights. By switching between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area as described above, it is possible to shorten the total lighting time per light source used for the marker lamp, Deterioration of the light source can be suppressed.

  Further, it is preferable that the control unit switches between the entire marker lamp lighting area and at least a part of the marker lamp non-lighting area.

  Preferably, the display further includes an image display area for displaying an image.

  When an image used for communication with a pedestrian or the like can be displayed on a display, the image does not have to be displayed at all times. Further, for example, when the display for displaying the image is a reflective display, the image is viewed from the outside without turning on an external light source for emitting light toward the reflective display when the surroundings are bright as in the daytime. obtain. On the other hand, it is preferable that the light source used for a marker lamp is lighted day and night. Therefore, the light source used for the marker lamp tends to be deteriorated easily because the total lighting time is longer than the light source for displaying the image on the display. Here, the total lighting time per light source used for the marker light is shortened by switching at least a part of the marker lamp lighting region and at least a part of the marker light non-lighting region as described above. Can. Therefore, the degree of deterioration of the light source used for the marker lamp and the degree of deterioration of the light source for displaying the image can be easily aligned. Therefore, it becomes easy to arrange the timing which should maintain the light source used for a marker light, and the timing which should maintain the light source for displaying the said image, and the effort of maintenance of a vehicle lamp can be saved.

  Preferably, at least a part of the marker lamp non-lighting area is at least a part of the image display area.

  By setting at least a part of the marker lamp non-lighting area as at least a part of the image display area, the display surface of the display can be efficiently used, and the display can be miniaturized.

  Moreover, it is preferable that the control unit switches at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area at predetermined intervals.

  By switching at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area at predetermined intervals, the degree of deterioration of the respective light sources used for the marker lamp can be easily made uniform. The time and effort of maintenance can be saved.

  Preferably, the control unit switches at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area between daytime and nighttime.

  For example, in the case where an OLED is used as a light source of a marker lamp, deterioration of the light source tends to particularly easily proceed by lighting the light source in an environment where the ambient temperature is high such as daytime as described above. In addition, even when another light source is used for the marker lamp, the brightness of the light source needs to be increased in a bright environment such as daytime, and the light source tends to be easily deteriorated. Therefore, deterioration of the light source used in the marker lamp lighting area can be suppressed by setting at least a part of the part considered to be the marker lamp lighting area in the nighttime as the marker lamp non-lighting area in the daytime.

  Further, it is preferable that the control unit performs switching between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area more frequently in the daytime than at night.

  As described above, the light source used in the marker lamp non-lighting area tends to deteriorate more easily in the daytime than in the nighttime. By switching between the lamp lighting area and the lamp non-lighting area frequently in the daytime, the continuous use time of the light source used for the lamp lighting area can be suppressed, and the deterioration of the light source can be suppressed. .

  The control unit may further include a temperature sensor for measuring an ambient temperature around the display, and the control unit may measure the measurement result by the temperature sensor when the measurement result by the temperature sensor is equal to or more than a predetermined value. Preferably, switching between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area is performed more frequently than in the case.

  As described above, when the light source is turned on in an environment where the ambient temperature is high, the light source tends to deteriorate. Therefore, in an environment where the ambient temperature is higher than a predetermined temperature, the switching time between the lamp lighting area and the lamp non-lighting area is frequently performed to continuously use the light source used in the lamp lighting area under high temperature environment. It is possible to suppress the deterioration of the light source.

  As described above, according to the present invention, there is provided a vehicular lamp capable of suppressing deterioration of a light source.

It is a figure which shows the example of the vehicle by which the vehicle lamp in embodiment of this invention was mounted. It is a block diagram of the vehicle lamp in the embodiment of the present invention. FIG. 1 is a front view schematically illustrating a display in an embodiment of the present invention. Fig. 2 schematically shows a part of the pixels of the display; It is a figure which shows the control flowchart of a control part. It is a figure which shows roughly a mode after switching a marker lamp lighting area | region and a marker lamp non-lighting area | region in the display shown in FIG. It is a front view which shows the display concerning the modification of this invention roughly. It is a figure which shows roughly a mode after switching a marker lamp lighting area | region and a marker lamp non-lighting area | region in the display shown in FIG. FIG. 6 schematically illustrates a portion of the pixels of a display according to another variant of the invention; It is a block diagram of a vehicle lamp according to still another modification of the present invention.

  Hereinafter, the form for carrying out the vehicle lamp concerning the present invention is illustrated with an accompanying drawing. The embodiments exemplified below are for the purpose of facilitating the understanding of the present invention, and are not for the purpose of limiting the present invention. The present invention can be modified or improved from the following embodiments without departing from the gist thereof.

  FIG. 1 is a view showing an example of a vehicle equipped with the vehicle lamp in the present embodiment. FIG. 1 is a view of the vehicle VE as viewed from the rear side. As shown in FIG. 1, on the back surface of the vehicle VE of the present embodiment, one vehicle lamp 1 is provided in each of the left and right directions.

  FIG. 2 is a block diagram of the vehicle lamp 1 in the present embodiment. As shown in FIG. 2, the vehicular lamp 1 of the present embodiment includes the display 2 and the control unit 3 as main components. As shown in FIG. 1, the display 2 is exposed to the outside from the vehicle VE, and emits light toward the outside of the vehicle VE. In addition, in order to simplify the description, the display 2 of FIG. 2 is changed in appearance from the display 2 of FIG. Further, the scanning line driving circuit 25 H is disposed on the side of the display 2, and the data line driving circuit 25 V is disposed on the lower side of the display 2.

  FIG. 3 is a front view schematically showing the display 2. As shown in FIG. 3, the display 2 of the present embodiment includes marker lamp lighting areas 21A and 21B, marker lamp non-lighting areas 22A and 22B, and an image display area 23.

  The marker lamp lighting areas 21A and 21B are areas where the marker lights are lit. In addition, since it is not necessary to always turn on a marker lamp, it is not necessary to always turn on marker lamp lighting area | region 21A, 21B. That is, it can be understood that the marker lamp lighting areas 21A and 21B are areas in which the marker lights are on or can be lit when the marker lamps should be lit. Therefore, the marker lamp lighting areas 21A and 21B may be on standby so that they can be lit when the marker lamp is not lit but the marker lamp should be lit. When the marker lamp should be lit, for example, when the marker lamp is a brake lamp, when the brake of the vehicle VE is operated, when the marker lamp is a turn signal lamp, the direction indicator of the vehicle VE is input. When the marker lamp is a back lamp, when the gear of the vehicle VE is put into the back gear, when the marker lamp is a tail lamp, when the head lamp of the vehicle VE is turned on. The marker lamp lighting area 21A of the present embodiment is an area where the tail lamp and the stop lamp are lit, and the marker lamp lighting area 21B of the present embodiment is an area where the turn signal lamp is lit.

  The marker lamp non-lighting areas 22A and 22B are areas different from the marker lamp lighting areas 21A and 21B, and are areas in which the marker lights are turned off. As described above, since the marker lamp need not always be lit, the marker lamp may be turned off even in the marker lamp lighting areas 21A and 21B. The marker lamp non-lighting areas 22A and 22B are areas where the marker lamp is not lighted and the marker lamp is not lighted even when the marker lamp should be lighted, and the marker lamp lighting areas 21A and 21B are It is distinguished. In the scene shown in FIG. 3, the marker lamp non-lighting area 22A is an area between the marker lamp lighting area 21A and the marker lamp lighting area 21B, and the marker lamp non-lighting area 22B is a lower part of the marker lamp lighting area 21B. It is an area.

  The image display area 23 is an area where the image 23i is displayed. The image display area 23 of the present embodiment is an area under the marker light non-lighting area 22B. Although the image which imitated the human face is shown as the image 23i by FIG. 3, the image 23i is not limited to this. The image 23i may be various characters, figures, predetermined characters, etc., and may be a still image or a moving image. Such an image 23i is used, for example, for communication with a driver of a succeeding vehicle or a pedestrian.

  FIG. 4 schematically shows a part of pixels of the display 2. The display 2 of the present embodiment has a plurality of pixels 31 and a plurality of pixels 32 alternately arranged in the longitudinal direction and the lateral direction. In the present embodiment, each pixel 31 is a self-luminous pixel, and includes, for example, an OLED as a light source. Each pixel 32 is a reflective pixel. Each pixel 32 includes, for example, a metal electrode, and is configured to reflect light emitted from an external light source (not shown) disposed on the front side of the display 2.

  The scanning line drive circuit 25 H and the data line drive circuit 25 V shown in FIG. 2 are connected to a drive circuit (not shown) provided in the display 2. The scanning line drive circuit 25H and the data line drive circuit 25V are electrically connected to the respective pixels 31 of the display 2 via the drive circuit. When a voltage is applied or a current flows from the scanning line drive circuit 25H and the data line drive circuit 25V, each pixel 31 is lighted or not lighted. Further, by controlling the magnitudes of voltage and current from the scanning line drive circuit 25H and the data line drive circuit 25V, the luminance of each pixel 31 is adjusted.

  The control unit 3 shown in FIG. 2 is electrically connected to the scanning line drive circuit 25H and the data line drive circuit 25V, and controls the lighting state of each pixel 31 of the display 2. The control unit 3 performs a part of the control based on a signal input to the control unit 3 from the outside. In the present embodiment, the control unit 3 is electrically connected to the control device 4 such as an ECU (Engine Control Unit) of the vehicle VE, the image display instruction unit 5 and the like. The image display instruction unit 5 outputs a signal to cause the display 2 to display the image 23i. This signal contains information related to the content of the image 23i.

  Next, the operation of the vehicle lamp 1 of the present embodiment will be described. FIG. 5 is a diagram showing a control flowchart of the control unit 3.

  In step SP1, after the self-emission type pixels 31 included in the marker lamp lighting areas 21A and 21B are lit, or when the pixels 31 included in the marker lamp lighting areas 21A and 21B are to be lit Measure the time since it became possible to turn on. When measurement of this time is started and a predetermined period has elapsed, the process proceeds to step SP2. Although the said predetermined period is not specifically limited, For example, it can be 5 minutes or less. By setting the predetermined period to 5 minutes or less, the light source of the pixel 31 can be kept at a low temperature, so deterioration of the light source can be suppressed.

  In step SP2, the control unit 3 switches the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B. FIG. 6 is a view schematically showing a state after switching the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B in the display 2 shown in FIG. By this operation, as shown in FIG. 6, in the present embodiment, the area which is the marker lamp non-lighting area 22A is set as the marker lamp lighting area 21A, and the area which is the marker lamp non-lighting area 22B is the marker lamp lighting area It is assumed that 21B.

  The control unit 3 lights the marker lights in the marker lamp lighting areas 21A and 21B based on the signal from the control device 4. For example, the control device 4 monitors the braking operation of the vehicle VE, and outputs a signal indicating the braking operation when the braking operation is performed. Based on the signal indicating the braking operation, the control unit 3 turns on the stop lamp in the marker lamp lighting area 21A. Further, since the marker lamp lighting area 21A is also an area for lighting the tail lamp, the control unit 3 receives a signal interlocking with the lighting of the headlamp of the vehicle VE from the control device 4 and lights the tail lamp in the marker lamp lighting area 21A. . Furthermore, when the direction indicator of the vehicle VE is input, the control device 4 outputs a signal to that effect, and the control unit 3 lights the turn signal lamp in the marker lamp lighting area 21B based on the signal.

  After step SP2, the process returns to step SP1 again.

  The control unit 3 also controls display and non-display of the image 23i separately from control of switching of the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B. The control unit 3 detects an image signal from the image display instructing unit 5 and causes the image display area 23 to display a predetermined image 23i. Specifically, the control unit 3 controls each pixel such that a predetermined image 23i is displayed on the image display area 23 of the display 2. More specifically, the control unit 3 drives the scanning line drive circuit 25H and the data line drive circuit 25V based on the information related to the content of the image included in the image signal from the image display instructing unit 5. The scanning line drive circuit 25H and the data line drive circuit 25V adjust the applied voltage and the flowing current, and adjust the brightness in the case of lighting, non-lighting, and lighting of each pixel. That is, the control unit 3 controls lighting and non-lighting of each pixel and controls the brightness of light emitted from each pixel via the scanning line driving circuit 25H and the data line driving circuit 25V. Thus, the control unit 3 controls the respective pixels to display a predetermined image 23i in the image display area 23.

  As described above, when the image 23i is displayed, the above-mentioned external light source (not shown) for emitting light to the self-luminous pixels 31 and 32 included in the image display area 23 is sufficient as in the daytime etc. When external light enters the image display area 23, it may be turned off. When sufficient ambient light is incident on the image display area 23, the ambient light is reflected by the pixels 32, whereby an image 23i can be displayed. On the other hand, when sufficient external light does not enter the image display area 23 as in the nighttime, the external light source for illuminating the light emitting pixels 31 and 32 included in the image display area 23 is turned on. .

  When the control unit 3 performs control to switch on and off of the external light source for emitting light to the light emitting pixels 31 and 32 included in the image display area 23 as described above in the daytime and in the night, the vehicle VE It is preferable that the signal interlocked with the lighting of the head lamp is input from the control device 4 to the control unit 3. The control unit 3 can perform control to switch on and off the light source between daytime and nighttime as described above based on the signal.

  As described above, the vehicle lamp 1 of the present embodiment includes the display 2 having the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B, and the entire marker lamp lighting areas 21A and 21B. The control unit 3 further includes a control unit 3 that switches over the marker lamp non-lighting areas 22A and 22B. According to the vehicle lamp 1 of the present embodiment, the total per light source used for the marker light is achieved by switching between the marker lamp lighting regions 21A and 21B and the marker light non-lighting regions 22A and 22B. The lighting time can be shortened and deterioration of the light source can be suppressed.

  Further, the display 2 of the present embodiment further includes an image display area 23 for displaying an image 23i. When the image 23i used for communication with a pedestrian or the like can be displayed on the display 2, the image 23i need not always be displayed. Further, for example, when the display 2 for displaying the image 23i has the reflective pixels 32 as in the present embodiment, the image 23i can be visually recognized from the outside without turning on the light source when the surroundings are bright such as daytime as described above. . On the other hand, it is necessary to turn on the beacon lamp day and night. Therefore, the light source used for the marker lamp tends to be deteriorated easily because the total lighting time becomes longer than the light source for displaying the image 23i on the display 2. Here, the total lighting time per light source used for the marker light can be shortened by switching the marker lamp lighting regions 21A and 21B and the marker light non-lighting regions 22A and 22B as described above . Therefore, the degree of deterioration of the light source used for the marker lamp and the degree of deterioration of the light source for displaying the image 23i can be easily aligned. Therefore, it becomes easy to arrange the timing which should maintain the light source used for a marker light, and the timing which should maintain the light source for displaying the image 23i, and the effort of maintenance of the vehicle lamp 1 can be saved.

  Further, the control unit 3 of the present embodiment switches the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B at predetermined intervals. By switching the marker lamp lighting areas 21A and 21B and the marker lamp non-lighting areas 22A and 22B at predetermined intervals, the degree of deterioration of the respective light sources used for the marker lights can be easily made uniform. The maintenance effort can be saved.

  As mentioned above, although the said embodiment was described to the example about this invention, this invention is not limited to these.

  For example, although the above embodiment has been described by way of an example in which the control unit 3 switches between the entire marker lamp lighting areas 21A and 21B and the entire marker lamp non-lighting areas 22A and 22B, the present invention is not limited thereto. . The control part 3 should just switch at least one part of marker lamp lighting area 21A, 21B, and at least one part of marker lamp non-lighting area 22A, 22B. Therefore, for example, the control unit 3 may switch between a part of the marker light lighting areas 21A and 21B and a part of the marker light non-lighting areas 22A and 22B, and the control part 3 may switch the marker light lighting areas 21A and 21B. The whole and part of the marker lamp non-lighting areas 22A and 22B may be switched.

  In the above embodiment, although the example in which the marker light non-lighting areas 22A and 22B switched with the marker light lighting areas 21A and 21B are provided separately from the image display area 23 has been described, at least at least the marker light non-lighting areas A part may be at least a part of the image display area 23. As described above, by setting at least a part of the marker light non-lighting area as at least a part of the image display area 23, the display surface of the display 2 can be efficiently used, and the display 2 can be miniaturized. FIG. 7 is a front view schematically showing such a display 2 according to a modification of the present invention, and FIG. 8 is a diagram showing the indicator light lighting areas 21A and 21B and the marker light non-lighting area in the display 2 shown in FIG. And schematically show the state after switching.

  As shown in FIG. 7, in the display 2 of this modification in a certain scene, the marker lamp lighting areas 21A and 21B are formed side by side in the vertical direction, and the image display area 23 is formed under the marker lamp lighting area 21B. Ru. At this time, it is understood that the image display area 23 is a marker lamp non-lighting area. Further, as shown in FIG. 8, in the display 2 of the present modification in another scene, the image display area 23 is formed in the upper part of the display 2, and in the lower part of the image display area 23, the marker lamp lighting areas 21A and 21B are up and down. Formed side by side in the direction. At this time, it is understood that the image display area 23 is a marker lamp non-lighting area.

  In the above embodiment, although the example in which the indicator lamp lighting area, the marker lamp non-lighting area, and the image display area are formed integrally in one display has been described, the marker lamp lighting area, the marker lamp non-lighting area The lighting area and the image display area may be formed on displays divided from one another. The image display area is not an essential component of the present invention.

  Moreover, although the said embodiment gave and demonstrated the example in which two marker lamp lighting area | regions are formed, the number in particular of a marker lamp lighting area is not limited. Further, the marker lamp is not limited to the tail lamp, the stop lamp, and the turn signal lamp exemplified in the above embodiment, and may be, for example, a back lamp.

  In the above embodiment, the display 2 having the light emitting pixels 31 and the reflective pixels 32 has been described as an example. However, the display 2 has a marker lamp lighting area by lighting and non-lighting a plurality of light sources. The display is not particularly limited as long as the display can be switched to the marker light non-lighting area at a predetermined timing. FIG. 9 is a view schematically showing a part of pixels of a display 2 according to another modification of the present invention. In the display 2 shown in FIG. 9, all the pixels are reflective pixels 31. Moreover, the display 2 is not limited to these forms, For example, you may be comprised by the pixel which has a backlight. In this case, it is preferable that the display 2 mainly includes, for example, a backlight provided on the back side of the display 2, a liquid crystal layer provided on the front side of the backlight, a color filter provided on the front side of the liquid crystal layer, and the like. In this case, the backlight may be a light source, and the light source may emit light directly toward the front side of the display 2, and light may be directed toward the front side of the display 2 through a light guide plate or the like. It may be irradiated. A plurality of light sources are provided, and are arranged so that light can be emitted independently to each of the marker lamp lighting areas 21A and 21B, the marker lamp non-lighting areas 22A and 22B, and the image display area 23. As such a light source, for example, an OLED or a light emitting diode (LED) is used. When the light source is an LED, for example, by providing a plurality of light sources with the LED array as one light source, as described above, the marker lamp lighting areas 21A and 21B, the marker lamp non-lighting areas 22A and 22B, and the image display area 23 It becomes easy to irradiate light independently to each area of. In addition, when using a light guide plate, a plurality of light guide plates independent of one another are disposed on the back side of each of the marker lamp lighting areas 21A and 21B, the marker lamp non-lighting areas 22A and 22B, and the image display area 23. Can. In this case, by providing a plurality of light sources corresponding to the respective light guide plates, as described above, the light source lighting regions 21A and 21B, the light non-lighting regions 22A and 22B, and the image display region 23 are independent. It becomes easy to irradiate light.

  Moreover, although the said embodiment gave and demonstrated the example which the control part 3 switches marker light lighting area 21A, 21B and marker light non-lighting area 22A, 22B for every predetermined period, the control part 3 lights a marker light. The timing of switching between the area and the marker lamp non-lighting area is not limited to this. For example, at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area may be switched between daytime and night. For example, in the case where an OLED is used as a light source of a marker lamp, deterioration of the light source tends to particularly easily proceed by lighting the light source in an environment where the ambient temperature is high such as daytime as described above. In addition, even when another light source is used for the marker lamp, the brightness of the light source needs to be increased in a bright environment such as daytime, and the light source tends to be easily deteriorated. Therefore, deterioration of the light source used in the marker lamp lighting area can be suppressed by setting at least a part of the part considered to be the marker lamp lighting area in the nighttime as the marker lamp non-lighting area in the daytime.

  Moreover, it is preferable that the control part 3 performs switching with at least one part of a marker lamp lighting area, and at least one part of a marker lamp non-lighting area more frequently at daytime than night time. As described above, the light source used in the marker lamp non-lighting area tends to deteriorate more easily in the daytime than in the nighttime. By switching between the lamp lighting area and the lamp non-lighting area frequently in the daytime, the continuous use time of the light source used for the lamp lighting area can be suppressed, and the deterioration of the light source can be suppressed. . In the nighttime, the switching between the marker lamp lighting area and the marker lamp non-lighting area may not be performed.

  Moreover, although the said embodiment gave and demonstrated the example which the control part 3 judges daytime or night time by lighting and extinguishing of the headlamp of the vehicle VE, this invention is not limited to the said form. FIG. 10 is a block diagram of a vehicle lamp according to still another modification of the present invention. The present modification differs from the above embodiment in that the sensor 6 is provided. The measurement result of the sensor 6 is input to the control unit 3. When the sensor 6 is an illuminance sensor, the controller 3 can determine whether it is daytime or nighttime by measuring the illuminance of light incident on the display surface of the display 2 by the sensor 6. Based on the measurement result of the sensor 6 as described above, the control unit 3 may control lighting and non-lighting of the external light source that emits light to the image display area 23 as described above. By measuring the illuminance of light incident on the display surface of the display 2 with the sensor 6, the brightness around the display 2 can be grasped. For example, when the surroundings of the display 2 are bright as in the daytime, the illuminance measured by the sensor 6 is high, and when the surroundings of the display 2 are dark as in the night, the illuminance measured by the sensor 6 is low. When the area around the display 2 is bright, it is difficult to view the image 23i unless the brightness of the image 23i is increased. When the area around the display 2 is dark, the image 23i can be viewed even if the brightness of the image 23i is lowered. Therefore, by adjusting the brightness of the image 23i according to the brightness around the display 2, it can be suppressed that the light source for irradiating the light to the image display area 23 is made brighter than necessary. Therefore, deterioration of the light source can be suppressed.

  The sensor 6 may be a temperature sensor that measures the ambient temperature around the display 2. In this case, when the measurement result by the sensor 6 is a predetermined value or more, the control unit 3 compares at least a part of the marker lamp lighting area with the marker lamp non-in comparison with the case where the measurement result by the sensor 6 is less than the predetermined value. Preferably, switching with at least a part of the lighting area is performed frequently. If the light source is turned on in an environment where the ambient temperature is high, the light source tends to deteriorate. Therefore, in an environment where the ambient temperature is higher than a predetermined temperature, the switching time between the lamp lighting area and the lamp non-lighting area is frequently performed to continuously use the light source used in the lamp lighting area under high temperature environment. It is possible to suppress the deterioration of the light source.

  According to the present invention, a vehicle lamp capable of suppressing deterioration of a light source is provided, and can be used in the field of vehicles such as automobiles.

DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Display 3 ... Control part 6 ... Sensor 21A, 21B ... Indicator light lighting area 22A, 22B ... Tag light non-lighting area 23 ... Image display Region 23i: Image 31: Pixel 32: Pixel VE: Vehicle

Claims (8)

A display having a marker lamp lighting area in which the marker lamp lights and a marker lamp non-lighting area in which the marker lamp lighting area is different from the marker lamp lighting area;
A control unit that switches between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area;
A vehicle lamp comprising: 2. The vehicular lamp according to claim 1, wherein the control unit switches between the entire marker lamp lighting area and at least a part of the marker lamp non-lighting area. The vehicle lamp according to claim 1, wherein the display further includes an image display area for displaying an image. The vehicle lamp according to claim 3, wherein at least a part of the marker lamp non-lighting area is at least a part of the image display area. The said control part switches at least one part of the said marker lamp lighting area | region, and at least one part of the said marker lamp non-lighting area for every predetermined | prescribed period, It is characterized by the above-mentioned. Vehicle lamps. The said control part switches at least one part of the said marker lamp lighting area, and at least one part of the said marker lamp non-lighting area by daytime and night time, The any one of Claim 1 to 4 characterized by the above-mentioned. Vehicle lamp. The control unit performs switching between at least a part of the marker lamp lighting area and at least a part of the marker lamp non-lighting area more frequently in the daytime than in the nighttime. The vehicle lamp according to any one of the items. It further comprises a temperature sensor for measuring the ambient temperature around the display,
When the measurement result by the temperature sensor is greater than or equal to a predetermined value, the control unit determines that the marker lamp corresponds to at least a part of the marker lamp lighting area, as compared to when the measurement result by the temperature sensor is less than the predetermined value. The vehicle lamp according to any one of claims 1 to 4, wherein switching with at least a part of the non-lighting area is performed frequently.

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