JP2018159796A - Liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display that, when part of a light source fails, can suppress a reduction in visibility of a specific image, while maintaining display of the specific image.SOLUTION: In a liquid crystal display 1, a liquid crystal panel 10 displays an image. A light source 20 includes a plurality of light emitting areas 22 that illuminate the liquid crystal panel 10. A failure detection part 80 detects failure of the plurality of light emitting areas 22 of the light source 20, and specifies failed light emitting areas and normal light emitting areas. A display control part 50 controls the liquid crystal panel 10 to display an image. When the failed light emitting areas and normal light emitting areas are present, the display control part 50 moves a specific image displayed in a display area of the liquid crystal panel 10 corresponding to the failed light emitting area to a display area of the liquid crystal panel 10 corresponding to the normal light emitting area, while maintaining the size of the specific image.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid crystal display device that displays an image.

  The liquid crystal display device includes a backlight that illuminates the liquid crystal panel. When a part of the backlight fails, it becomes difficult to visually recognize an image corresponding to the failed part. As a technique for coping with a failure of a part of a liquid crystal display device, a technique for detecting a failure point of the liquid crystal display device, reducing the image displayed on the entire screen, and displaying it on a displayable area of the screen is known. (For example, refer to Patent Document 1).

JP 2010-107933 A

  In the above technique, since the entire image is reduced, there is a specific image that is desired to be conspicuous, and when the specific image is relatively small, the visibility of the reduced specific image may be reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a liquid crystal capable of suppressing a decrease in the visibility of a specific image while maintaining the display of the specific image when a part of the light source fails. It is to provide a display device.

  In order to solve the above problems, a liquid crystal display device according to an aspect of the present invention includes a liquid crystal panel that displays an image, a light source that includes a plurality of light-emitting regions that illuminate the liquid crystal panel, and a failure in the plurality of light-emitting regions of the light source. A failure detection unit that detects and identifies a faulty light emission region and a normal light emission region; and a display control unit that displays an image on a liquid crystal panel. When there is a faulty light emission area and a normal light emission area, the display control unit displays a specific image displayed in the display area of the liquid crystal panel corresponding to the faulty light emission area on the liquid crystal panel corresponding to the normal light emission area. Move to the display area while maintaining the size.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, when a part of light source fails, the fall of the visibility of a specific image can be suppressed, maintaining the display of a specific image.

It is a figure which shows the structure of the liquid crystal display device which concerns on one Embodiment. It is a figure which shows an example of the normal image displayed on the liquid crystal panel of FIG. 1 when a light source is normal. It is a figure which shows an example of the image displayed on the liquid crystal panel of FIG. 1 when the light emission area fails. 3 is a flowchart showing an operation of the liquid crystal display device of FIG. 1. FIG. 5A is a diagram illustrating an example of a telltale displayed on the liquid crystal panel when the light source is normal according to the modification, and FIG. 5B is a diagram illustrating a failure in the light emitting region according to the modification. It is a figure which shows an example of the tell tale displayed on the liquid crystal panel in the case. FIG. 6A is a diagram illustrating an example of a tell tale displayed on the liquid crystal panel when the light source is normal according to the modification, and FIG. 6B is a diagram illustrating a failure in the light emitting region according to the modification. It is a figure which shows an example of the tell tale displayed on the liquid crystal panel in the case. It is a flowchart which shows operation | movement of the liquid crystal display device which concerns on a modification.

  FIG. 1 is a diagram illustrating a configuration of a liquid crystal display device 1 according to an embodiment. The liquid crystal display device 1 is assumed to be a liquid crystal meter mounted on a vehicle such as an automobile. The liquid crystal display device 1 includes a liquid crystal panel 10, a light source 20, a control unit 30, a storage unit 40, a display control unit 50, a timing control unit 60, a plurality of drive circuits 70, and a plurality of drive circuits 72. The failure detection unit 80 is provided.

  The liquid crystal panel 10 is disposed in the vehicle interior of the vehicle and displays an image of the liquid crystal meter. The light source 20 is a direct-type planar backlight that is disposed on the back side of the liquid crystal panel 10 and illuminates the liquid crystal panel 10. The light source 20 includes a plurality of light emitting regions 22 that illuminate the liquid crystal panel 10. The plurality of light emitting regions 22 are arranged in a matrix. The number of the light emitting regions 22 is not particularly limited. The luminance of each light emitting area 22 can be changed. In each light emitting region 22, an LED (light emitting diode) (not shown) is arranged.

  The control unit 30 is composed of a CPU (Central Processing Unit). The control unit 30 is supplied with an activation signal SA and display data DAT from outside the liquid crystal display device 1. The activation signal SA is a signal supplied when an electronic key possessed by the driver is operated or when an ignition switch of the vehicle is turned on. The display data DAT includes vehicle information such as the vehicle speed and information indicating whether or not to display various telltales. The activation signal SA and the display data DAT are supplied via a CAN (Controller Area Network) bus. The control unit 30 starts the operation when receiving the activation signal SA. The control unit 30 processes the display data DAT so that the display control unit 50 can handle the data, and supplies the display data DAT to the display control unit 50. The storage unit 40 is composed of an EEPROM or the like, and stores various data.

  The display control unit 50 is configured by a GPU (Graphics Processing Unit). The display control unit 50 reads various data necessary for image display such as the image form and the image display position from the storage unit 40. The display control unit 50 generates image data based on the data supplied from the control unit 30 and the storage unit 40, and supplies the generated image data to the liquid crystal panel via a drive circuit (not shown). Display the image of the LCD meter.

  The display control unit 50 controls the light source 20 via the timing control unit 60, the drive circuit 70, and the drive circuit 72 based on the generated image data, and controls the luminance of each light emitting region 22. The display control unit 50 changes the luminance of each light emitting region 22 of the light source 20 according to the image displayed on the liquid crystal panel 10. Such control is called local dimming. Details of the display control unit 50 will be described later.

  The timing control unit 60 generates a timing signal including luminance information and timing information under the control of the display control unit 50, and supplies the timing signal to the plurality of drive circuits 70 and the plurality of drive circuits 72. Each of the drive circuits 70 drives the LEDs in the light emitting regions 22 in the corresponding row according to the timing signal. Each of the drive circuits 72 drives the LEDs in the light emitting regions 22 in the corresponding column according to the timing signal. Each of the drive circuit 70 and the drive circuit 72 is configured as a loopback circuit, detects a failure in the light emitting region 22 using a known loopback technique, and supplies the detection result to the failure detection unit 80.

  The failure detection unit 80 detects failures in the plurality of light emitting regions 22 of the light source 20 based on the detection results of the drive circuit 70 and the drive circuit 72, and identifies the failed light emitting region 22 and the normal light emitting region 22. The failure detection unit 80 supplies information for identifying the failed light emitting region 22 and the normal light emitting region 22 to the display control unit 50. In the present embodiment, the failure detection unit 80 performs failure detection once when the control unit 30 receives the activation signal SA.

  Next, details of the display control unit 50 will be described with reference to FIGS. 2 and 3. FIG. 2 is a diagram illustrating an example of a normal image displayed on the liquid crystal panel 10 of FIG. 1 when the light source 20 is normal. In FIG. 2, the plurality of light emitting areas 22 of the light source 20 and the LEDs 24 arranged in each of the light emitting areas 22 are shown superimposed on the image displayed on the liquid crystal panel 10. Each of the light emitting areas 22 illuminates the corresponding display area 12 in the liquid crystal panel 10. Each light emitting area 22 overlaps the corresponding display area 12. Hereinafter, when each of the plurality of display areas 12 is distinguished, they are referred to as display areas 12a and 12b. When distinguishing each of the plurality of light emitting regions 22, they are referred to as light emitting regions 22a and 22b.

  When the light emitting area 22a among the plurality of light emitting areas 22 is normal, the display control unit 50 displays the vehicle's telltale 100 as a specific image on the display area 12a of the liquid crystal panel 10 illuminated by the light emitting area 22a. . The tell tale 100 is the tell tale of the left turn indicator.

  When the light emitting area 22c is normal, the display control unit 50 displays the telltale 102, which is another specific image related to the specific image, on the display area 12c of the liquid crystal panel 10 illuminated by the light emitting area 22c. The light emitting region 22c is disposed at a position symmetrical to the light emitting region 22a with respect to the symmetry axis AX1 passing in the vertical direction near the center of the liquid crystal panel 10. The tell tale 102 is the tell tale of the right direction indicator paired with the tell tale 100. The tell tale 100 and the tell tale 102 are displayed symmetrically. In the illustrated example, the tell tale 100 and the tell tale 102 are displayed for clarity, but one tell tale blinks in response to the operation of the direction indicator switch of the vehicle, and the hazard warning switch of the vehicle is displayed. In response to the operation, the tell tale 100 and the tell tale 102 are displayed blinking.

  When the light emitting area 22e is normal, the display control unit 50 displays the tell tale 104 that is a specific image on the display area 12e of the liquid crystal panel 10 illuminated by the light emitting area 22e. The tell tale 104 is a tell tale of a position lamp.

  When the light emitting area 22f is normal, the display control unit 50 displays the tell tale 106 that is a specific image on the display area 12f of the liquid crystal panel 10 illuminated by the light emitting area 22f. The tell tale 106 is a tell tale of a seat belt warning light.

  When the light emitting area 22a and the light emitting area 22b are normal, the display control unit 50 hides the image on the display area 12b of the liquid crystal panel 10 illuminated by the light emitting area 22b. The light emitting region 22b is located on the left side of the light emitting region 22a and is adjacent to the light emitting region 22a. The display area 12b is located on the left side of the display area 12a and is adjacent to the display area 12a. Making an image non-display means, for example, displaying black.

  When the light emitting region 22c and the light emitting region 22d at a position symmetrical to the light emitting region 22b with respect to the symmetry axis AX1 are normal, the display control unit 50 displays the display region 12d of the liquid crystal panel 10 illuminated by the light emitting region 22d. Hide the image. The light emitting region 22d is located on the right side of the light emitting region 22c and is adjacent to the light emitting region 22c. The display area 12d is located on the right side of the display area 12c and is adjacent to the display area 12c.

  The display control unit 50 displays the speed of the vehicle in a predetermined plurality of display areas 12 other than the display area 12a, the display area 12b, the display area 12c, the display area 12d, the display area 12e, and the display area 12f of the liquid crystal panel 10. Images of the meter 150 and the tachometer 160 indicating the engine speed are displayed.

  By the local dimming, for example, the luminance of the light emitting region 22 that illuminates the telltales 100, 102, 104, 106, the speedometer 150, and the tachometer 160 is controlled to be higher than the luminance of the other light emitting regions 22. For example, the display control unit 50 sets the luminance of the light emitting area 22a and the light emitting area 22c to the first value. The display control unit 50 sets the luminance of the light emitting region 22b and the light emitting region 22d to a second value lower than the first value while the image is not displayed on the display region 12b and the display region 12d of the liquid crystal panel 10. Set. At this time, the display control unit 50 may set the second value to substantially zero and turn off the light emitting region 22b and the light emitting region 22d.

  Note that tell tales other than the tell tales 100, 102, 104, and 106 can also be displayed on the liquid crystal panel 10 as specific images. The size, number, and position of the tell tale are not particularly limited.

  FIG. 3 is a diagram illustrating an example of an image displayed on the liquid crystal panel 10 of FIG. 1 when the light emitting region 22a has failed. In FIG. 3, the light emitting areas 22 other than the light emitting area 22a are normal. The display control unit 50 recognizes the displayable area of the liquid crystal panel 10. In the case of FIG. 3, the displayable area is the display area 12 other than the display area 12a.

  When the light emitting area 22a fails and the light emitting area 22b is normal, the display control unit 50 does not display the display position of the tell tail 100 while maintaining the size of the tell tail 100 when the light emitting area 22a is normal. To the display area 12b. Further, in this case, the display control unit 50 moves the display position of the tell tale 102 to the display area 12d where the image is not displayed while maintaining the size of the tell tale 102 when displayed in the display area 12c. That is, the display control unit 50 moves the tell tale 102 that is paired with the tell tale 100 to a position symmetrical with the tell tale 100.

  Further, when the display control unit 50 moves the tell tales 100 and 102, the images of the speedometer 150 and the tachometer 160 other than the tell tales 100 and 102, and the display positions of the tell tales 104 and 106 in the display area 12e and the display area 12f are displayed. maintain. That is, in this case, the display control unit 50 does not change the images of the speedometer 150 and the tachometer 160 and the telltales 104 and 106.

  When the display position of the tell tale 100 is moved to the display area 12b and the display position of the tell tale 102 is moved to the display area 12d, the display control unit 50 changes the luminance of the light emitting area 22b and the light emitting area 22d from the second value. Increase to a value of 1.

  In this case, the display control unit 50 displays information 200 indicating failure on the liquid crystal panel 10. In the example of FIG. 3, the failure information 200 is text information “Display failure needs to be replaced”.

  Even when the light emitting area 22c fails instead of the light emitting area 22a, the display position of the tell tale 100 is moved to the display area 12b and the display position of the tell tail 102 is moved to the display area 12d as described above.

  Although illustration is omitted, when the light emitting area 22e fails, the display position of the tell tale 104 is moved to the display area 12 where the image on the left side of the display area 12e is not displayed in the same manner as described above. Even when the light emitting area 22f fails, the display position of the tell tale 106 is moved to the display area 12 where the image on the right side of the display area 12f is not displayed in the same manner as described above. Since the tell tale 104 is not related to the tell tale 106, the display position is controlled independently of the control of the display position of the tell tale 106.

  The configurations of the control unit 30, the display control unit 50, the timing control unit 60, and the failure detection unit 80 can be realized in hardware by a CPU, memory, or other LSI of any computer, and in software It is realized by a program loaded in a memory or the like, but here, functional blocks realized by their cooperation are depicted. Therefore, those skilled in the art will understand that this functional block can be realized in various forms by hardware alone or by a combination of hardware and software.

  Next, the operation of the liquid crystal display device 1 having the above configuration will be described. FIG. 4 is a flowchart showing the operation of the liquid crystal display device 1 of FIG. When the control unit 30 receives the activation signal SA (S10), the failure detection unit 80 detects a failure of the light source 20 (S12), and when there is a failure (Y of S14), the display control unit 50 sets the displayable area. Recognize (S16). The display control unit 50 moves the tell tale, which is a specific image (S18), and causes the liquid crystal panel 10 to display information 200 indicating a failure (S20). On the other hand, when there is no failure in S14 (N in S14), the display control unit 50 displays a normal image on the liquid crystal panel 10 (S22).

  Thus, according to the present embodiment, when the light emitting area 22a fails and the light emitting area 22b is normal, the display position of the tell tail 100 is maintained while maintaining the size of the telltale 100 when the light emitting area 22a is normal. The display area 12b is illuminated by the light emitting area 22b. Thereby, when a part of light source 20 fails, the fall of the visibility of tell tale 100 can be controlled, maintaining the display of tell tale 100 which is a specific picture. Therefore, the driver can easily visually recognize the telltale 100 until the liquid crystal display device 1 is repaired or replaced.

  In addition, when the light emitting area 22a fails, the telltale 100 is moved to the display area 12b where the image is not displayed, so that other images are not affected.

  Further, while the luminance of the light emitting area 22a is set to the first value and the image is not displayed on the display area 12b, the luminance of the light emitting area 22b is set to the second value lower than the first value. ing. When the display position of the tell tale 100 is moved to the display area 12b, the luminance of the light emitting area 22b is increased to the first value. Thereby, the power consumption of the light source 20 can be suppressed, the heat generation of the light source 20 can be suppressed, and the contrast of the image can be improved.

  Furthermore, since the telltale 100 is moved to the display area 12b corresponding to the normal light emitting area 22b adjacent to the failed light emitting area 22a, the moving distance of the telltale 100 can be minimized. Therefore, it is difficult to make the driver feel uncomfortable.

  Further, when the display position of the tell tale 100 is moved to the display area 12 b, the tell tale 102 that is paired with the tell tale 100 is also moved to a position symmetrical with the tell tale 100. In this way, since the tell tale 100 and the tell tale 102 are moved while maintaining symmetry, it is possible to make it difficult for the driver to feel uncomfortable compared to the case where only one tell tale is moved.

  In addition, when the telltales 100 and 102 are moved, the images of the speedometer 150 and the tachometer 160 other than the telltales 100 and 102 and the display positions of the telltales 104 and 106 in the display area 12e and the display area 12f are maintained. Changes can be minimized. Therefore, it is difficult to make the driver feel uncomfortable.

  In the above, this invention was demonstrated based on embodiment. This embodiment is an exemplification, and it is understood by those skilled in the art that various modifications can be made to each of those constituent elements or combinations of the respective treatment processes, and such modifications are also within the scope of the present invention. is there.

  For example, in the above embodiment, the tell tale has been described as an example displayed on one display area 12 illuminated by one light emitting area 22, but the tell tale is illuminated by two or more different light emitting areas 22. It may be displayed across the display area 12. An example in which the tell tale is displayed across the two display areas 12 will be described below with reference to FIGS. 5 (a), 5 (b), 6 (a), and 6 (b).

  FIG. 5A is a diagram illustrating an example of the tell tale 100a displayed on the liquid crystal panel 10 when the light source 20 is normal according to the modification, and FIG. 5B is a light emitting region according to the modification. It is a figure which shows an example of the tell tale 100a displayed on the liquid crystal panel 10 when 22a fails.

  As shown in FIG. 5A, when the light emitting area 22a and the light emitting area 22b are normal, the display control unit 50 displays one tell tale 100a in the display area 12a and the display area 12b.

  As shown in FIG. 5B, the display control unit 50 determines whether the tell tale 100a is in the case where the light emitting area 22a fails and the light emitting area 22b and the light emitting area 22h are normal, and the light emitting area 22a and the light emitting area 22b are normal. While maintaining the size, the display position of the tell tale 100a is moved to the display area 12b and the display area 12h. The display area 12h is illuminated by the light emitting area 22h. The display area 12h is located on the left side of the display area 12b and is adjacent to the display area 12b. The light emitting area 22h is located on the left side of the light emitting area 22b and is adjacent to the light emitting area 22b.

  FIG. 6A is a diagram illustrating an example of the tell tale 100a displayed on the liquid crystal panel 10 when the light source 20 is normal, and FIG. 6B is a light emitting region according to the modification. It is a figure which shows an example of the tell tale 100a displayed on the liquid crystal panel 10 when 22a fails.

  As shown in FIG. 6A, when the light emitting area 22a and the light emitting area 22b are normal, the display control unit 50 displays one tell tale 100a in the display area 12a and the display area 12b.

  As shown in FIG. 6 (b), the display control unit 50 detects the telltale 100a when the light emitting area 22b fails, the light emitting area 22h and the light emitting area 22i are normal, and the light emitting area 22a and the light emitting area 22b are normal. While maintaining the size, the display position of the tell tail 100a is moved to the display area 12h and the display area 12i. The display area 12i is illuminated by the light emitting area 22i. The display area 12i is located on the left side of the display area 12h and is adjacent to the display area 12h. The light emitting area 22i is located on the left side of the light emitting area 22h and is adjacent to the light emitting area 22h.

  In these modified examples, the tell tale is not displayed in only one display area 12, so that the size of the tell tale and the degree of freedom of arrangement can be increased.

  Moreover, although the above embodiment demonstrated the example in which failure detection is performed once when the control part 30 receives the starting signal SA, failure detection may be performed regularly. FIG. 7 is a flowchart showing the operation of the liquid crystal display device 1 according to the modification. In the modified example, when there is a failure in S14 (Y in S14), the process is performed in the order of S20, S16, and S18, and the process returns to S12 after S18 and returns to S12 after S22. Different from the embodiment. That is, the failure detection unit 80 periodically detects failures in the plurality of light emitting regions 22. When the light emitting region 22a fails and the light emitting region 22b is normal, the display control unit 50 displays information 200 indicating the failure on the liquid crystal panel 10 before moving the display position of the tell tale 100 to the display region 12b.

  In this modification, when a failure occurs, the display position of the tell tale 100 can be moved after the driver operating the vehicle recognizes the failure of the liquid crystal display device 1 based on the information 200 indicating the failure. This makes it difficult for the driver to feel uncomfortable. This is because the driver may be surprised if the display position of the tell tail 100 suddenly moves before the driver driving the vehicle recognizes the failure.

  In addition, when the light emitting region 22 breaks down, the direction in which the tell tale display position is moved is not limited to the example in the above embodiment. When the light emitting area 22 breaks down, the display position of the tell tale may be moved to the display area 12 below the display area 12 where the tell tale is displayed, or the display area 12 where the tell tale is displayed. It may be moved to the display area 12 above the display area or may be moved to the display area 12 in the oblique direction of the display area 12 where the telltale is displayed.

  Further, the symmetry axis AX1 may pass through a position different from the vicinity of the center of the liquid crystal panel 10 in the vertical direction or may pass in the left-right direction.

  The liquid crystal display device 1 is not limited to a liquid crystal meter as long as the liquid crystal display device 1 is a display device that displays an image including a specific image to be conspicuous. That is, the specific image is not limited to the tell tale.

One embodiment of the present invention is as follows.
[Item 1]
A liquid crystal panel for displaying images;
A light source including a plurality of light emitting areas for illuminating the liquid crystal panel;
Detecting a failure of the plurality of light emitting areas of the light source and identifying a faulty light emitting area and a normal light emitting area;
A display control unit for displaying an image on the liquid crystal panel,
The display control unit displays a specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area when the failed light emitting area and the normal light emitting area exist. Move to the display area of the liquid crystal panel corresponding to
A liquid crystal display device characterized by the above.
According to this aspect, when a part of the light source fails, it is possible to suppress a decrease in the visibility of the specific image while maintaining the display of the specific image.

[Item 2]
The liquid crystal panel is mounted on a vehicle,
The display control unit displays the telltale of the vehicle as the specific image;
Item 3. A liquid crystal display device according to item 1, wherein
In this case, when a part of the light source breaks down, it is possible to maintain the display of the tell tale while suppressing the decrease in the visibility of the tell tail. Therefore, even if a part of the light source fails, the tell tale can be made conspicuous.

[Item 3]
The display control unit
An image is not displayed in a part of the display area of the liquid crystal panel,
The specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area is moved while maintaining the size to the non-display area of the liquid crystal panel corresponding to the normal light emitting area. Let
Item 3. The liquid crystal display device according to item 1 or 2,
In this case, when the light emitting area breaks down, the specific image is moved to the display area where the image is not displayed, so that other images can be prevented from being affected.

[Item 4]
The display control unit
The luminance of the light emitting area corresponding to the display area of the liquid crystal panel displaying the image is set to a first value;
The luminance of the light emitting area corresponding to the display area of the liquid crystal panel that does not display an image is set to a second value lower than the first value,
When the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area is moved to the display area of the non-displayed liquid crystal panel while maintaining the size, the display area The luminance of the light emitting area corresponding to is increased from the second value to the first value,
Item 6. The liquid crystal display device according to Item 3.
In this case, the power consumption of the light source can be suppressed, the heat generation of the light source can be suppressed, and the contrast of the image can be improved.

[Item 5]
The display control unit displays the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area, and the liquid crystal corresponding to the normal light emitting area adjacent to the failed light emitting area. Move it to the display area of the panel while maintaining its size.
5. The liquid crystal display device according to any one of items 1 to 4, wherein:
In this case, the moving distance of the specific image when the specific image is moved can be minimized. Therefore, it is difficult to make the driver feel uncomfortable.

[Item 6]
The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. When moving as is, the image paired with the specific image is also moved to a position symmetrical with the specific image.
6. The liquid crystal display device according to any one of items 1 to 5, wherein
In this case, the specific image and the image paired with the specific image are moved while maintaining symmetry, so that it is difficult for the driver to feel uncomfortable as compared to the case of moving only one of them.

[Item 7]
The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. Maintaining the display position of an image other than the specific image
6. The liquid crystal display device according to any one of items 1 to 5, wherein
In this case, the change of the image can be minimized. Therefore, it is difficult to make the driver feel uncomfortable.

[Item 8]
The failure detection unit periodically detects failures in the plurality of light emitting regions,
The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. Before moving the display, information indicating the failure is displayed on the liquid crystal panel.
8. The liquid crystal display device according to any one of items 1 to 7, wherein
In this case, when a failure occurs, the display position of the specific image can be moved after the driver operating the vehicle is made aware of the failure of the liquid crystal display device based on the information indicating the failure. Can make it difficult for people to feel uncomfortable.

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal display device, 10 ... Liquid crystal panel, 12, 12a, 12b, 12c, 12d, 12e, 12f, 12h, 12i ... Display area, 20 ... Light source, 22, 22a, 22b, 22c, 22d, 22e, 22f, 22h, 22i ... emission region, 50 ... display control unit, 80 ... failure detection unit, 100, 100a, 102, 104, 106 ... telltale, AX1 ... symmetry axis.

Claims (8)

A liquid crystal panel for displaying images;
A light source including a plurality of light emitting areas for illuminating the liquid crystal panel;
Detecting a failure of the plurality of light emitting areas of the light source and identifying a faulty light emitting area and a normal light emitting area;
A display control unit for displaying an image on the liquid crystal panel,
The display control unit displays a specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area when the failed light emitting area and the normal light emitting area exist. Move to the display area of the liquid crystal panel corresponding to
A liquid crystal display device characterized by the above. The liquid crystal panel is mounted on a vehicle,
The display control unit displays the telltale of the vehicle as the specific image;
The liquid crystal display device according to claim 1. The display control unit
An image is not displayed in a part of the display area of the liquid crystal panel,
The specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area is moved while maintaining the size to the non-display area of the liquid crystal panel corresponding to the normal light emitting area. Let
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. The display control unit
The luminance of the light emitting area corresponding to the display area of the liquid crystal panel displaying the image is set to a first value;
The luminance of the light emitting area corresponding to the display area of the liquid crystal panel that does not display an image is set to a second value lower than the first value,
When the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area is moved to the display area of the non-displayed liquid crystal panel while maintaining the size, the display area The luminance of the light emitting area corresponding to is increased from the second value to the first value,
The liquid crystal display device according to claim 3. The display control unit displays the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area, and the liquid crystal corresponding to the normal light emitting area adjacent to the failed light emitting area. Move it to the display area of the panel while maintaining its size.
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. When moving as is, the image paired with the specific image is also moved to a position symmetrical with the specific image.
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. Maintaining the display position of an image other than the specific image
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device. The failure detection unit periodically detects failures in the plurality of light emitting regions,
The display control unit maintains the size of the specific image displayed in the display area of the liquid crystal panel corresponding to the failed light emitting area in the display area of the liquid crystal panel corresponding to the normal light emitting area. Before moving the display, information indicating the failure is displayed on the liquid crystal panel.
The liquid crystal display device according to claim 1, wherein the liquid crystal display device is a liquid crystal display device.

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