Circuit device and display device

Abstract

To provide a circuit device, etc., with which it is possible to provide a natural display image, even when abnormality occurs to a light source.SOLUTION: A circuit device 100 is used for a display device 40. The display device 40 includes a display panel 340 and a backlight 330 having a plurality of light sources. Each of a plurality of light sources is provided corresponding to each of a plurality of areas of the display panel 340. The circuit device 100 includes a light quantity abnormality detection circuit 145, a dimmer circuit 135, and a color correction circuit 115. The light quantity abnormality detection circuit 145 detects light quantity abnormality in each light source. The dimmer circuit 135 adjusts the light quantities of light sources other than an abnormal light source in which light quantity abnormality has been detected, so as to compensate for light quantity in the area corresponding to the abnormal light source. The color correction circuit 115 performs color correction corresponding to the adjusted light quantity on the image data of the area that corresponds to the adjustment-subjected light source the light quantity of which has been adjusted.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a circuit device, a display device, and the like. [Background technology]

[0002] Patent Document 1 discloses a display device that adjusts display quality. The display device monitors whether an abnormality has occurred in any of the multiple cold-cathode tubes in the backlight unit, preventing normal light emission. When an abnormality occurs, the display device adjusts the power supply voltage supplied to the horizontal scanning unit, adjusts the video signal sent from the horizontal scanning unit to the pixel cells, or adjusts the intensity of the illumination light that the backlight unit uses to illuminate the display panel, so as to correct a decrease in brightness in the abnormal display area on the display panel that may occur due to the abnormality in the cold-cathode tube. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-294506 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned Patent Document 1, when an abnormality occurs in a cold-cathode tube, the brightness of the area on the display panel that the cold-cathode tube should illuminate decreases. Patent Document 1 discloses correcting the brightness decrease by adjusting the light-emitting intensity of a normal cold-cathode tube. However, adjusting the light-emitting intensity of a normal cold-cathode tube changes the brightness of the area on the display panel illuminated by that cold-cathode tube, resulting in display unevenness and an unnatural overall display. Patent Document 1 also discloses correcting the brightness decrease caused by an abnormal cold-cathode tube by adjusting the video signal sent from the horizontal scanning unit to the pixel cell. However, it does not disclose or suggest adjusting the video signal accordingly when adjusting the light-emitting intensity of a normal cold-cathode tube. [Means for solving the problem]

[0005] One aspect of the present disclosure relates to a circuit device used in a display device that includes a display panel and a backlight having a plurality of light sources, with each light source of the plurality of light sources being provided corresponding to each of a plurality of areas of the display panel, the circuit device including: a light intensity abnormality detection circuit that detects abnormal light intensity in each of the light sources; a dimming circuit that performs light intensity compensation processing to compensate for the light intensity in the area corresponding to the abnormal light source by adjusting the light intensity of light sources other than the abnormal light source, which is the light source for which the light intensity abnormality has been detected; and a color correction circuit that performs color correction in accordance with the adjusted light intensity on image data of an area corresponding to the adjustment target light source, which is the light source whose light intensity has been adjusted.

[0006] Another aspect of the present disclosure relates to a display device including the circuit device described above, the display panel that displays an image based on the image data, and the backlight. [Brief explanation of the drawings]

[0007] [Figure 1] 1 shows an example of the configuration of a display device. [Figure 2] An example of detailed display configuration. [Figure 3] 1 shows a first detailed configuration example of a circuit device. [Figure 4] 5A and 5B are diagrams for explaining the correspondence between malfunction information and light source positions on a display panel. [Figure 5] 10 is a first example of a process performed by the circuit device of the first detailed configuration example when an abnormality in the amount of light occurs. [Figure 6] 10 is a second example of a process performed by the circuit device of the first detailed configuration example when an abnormality in the amount of light occurs. [Figure 7] 1 shows an example of the configuration of a head-up display device. [Figure 8] 10 shows a second detailed configuration example of a circuit device. [Figure 9] 10 shows an example of processing performed by the circuit device of the second detailed configuration example when an abnormality in the amount of light occurs. [Figure 10] 10 shows a third detailed configuration example of a circuit device. [Figure 11] 10 shows an example of processing performed by the circuit device of the third detailed configuration example when an abnormality in the amount of light occurs. [Figure 12] 4 shows a fourth detailed configuration example of the circuit device. DETAILED DESCRIPTION OF THE INVENTION

[0008] Preferred embodiments of the present disclosure will be described in detail below. Note that the embodiments described below do not unduly limit the scope of the claims, and not all of the configurations described in the embodiments are necessarily essential components.

[0009] 1.Display device 1 shows an example of the configuration of a display device 40 including a circuit device 100 according to this embodiment. The display device 40 includes the circuit device 100 and a display unit 300.

[0010] The processing device 200 transmits image data to the circuit device 100 of the display device 40. The processing device 200 is a so-called SoC, and is, for example, a processor such as a CPU or a microcomputer. SoC is an abbreviation for System on Chip. CPU is an abbreviation for Central Processing Unit.

[0011] The circuit device 100 acquires fault information about the backlight light source, and adjusts the backlight and performs color correction on image data based on the fault information. The circuit device 100 transmits the color-corrected image data to the display unit 300. The circuit device 100 is, for example, an integrated circuit device in which multiple circuit elements are integrated on a semiconductor substrate.

[0012] The display unit 300 includes a display panel and a backlight, and displays the color-corrected image data from the circuit device 100 on the display panel. The backlight emits light to the display panel, and the light that passes through the display panel enters the user's eyes, allowing the user to view the image displayed on the display panel.

[0013] The display device 40 may be any device that presents an image to a user based on image data. Examples of the display device 40 include an in-vehicle cluster panel, a television device, a monitor of an information processing terminal, a projector, or a head-up display device. Examples of head-up display devices will be described later.

[0014] 2. Detailed configuration example of the display unit and first detailed configuration example of the circuit device 2 shows an example of a detailed configuration of the display unit 300. The display unit 300 includes a processing unit 310, a light source driver 320, a backlight 330, and a display panel 340.

[0015] The processing device 310 converts between the communication format used by the light source interface circuit 192 of the circuit device 100 and the communication format used by the light source driver 320. The processing device 310 is a processor such as a CPU or a microcomputer. Note that the processing device 310 may be omitted, and the light source interface circuit 192 and the light source driver 320 may communicate directly with each other.

[0016] The backlight 330 includes a plurality of light sources that are two-dimensionally arranged in a planar view. Each light source is, for example, a light-emitting element such as an LED. LED is an abbreviation for Light Emitting Diode. The backlight 330 is arranged overlapping the display panel 340 so that the side on which the plurality of light sources are arranged faces the display panel 340 in a planar view. As a result, light emitted from the two-dimensionally arranged plurality of light sources is incident on the display panel 340. The two-dimensional arrangement of the light sources is, for example, a matrix arrangement, but is not limited to this and may be, for example, a staggered arrangement. A staggered arrangement is an arrangement in which, for example, light sources are arranged in odd-numbered rows and odd-numbered columns, and light sources are arranged in even-numbered rows and even-numbered columns.

[0017] The light source driver 320 drives each light source of the backlight 330 based on light source control data from the light source interface circuit 192. The light source driver 320 also detects a failure in each light source of the backlight 330 and transmits the failure information to the light source interface circuit 192. The light source driver 320 includes a first driver DR1 to an n-th driver DRn, where n is an integer equal to or greater than 1. Each driver is formed, for example, by an integrated circuit device.

[0018] Specifically, the first driver DR1 drives some of the multiple light sources of the backlight 330. The first driver DR1 turns on or off each of the light sources it is responsible for independently. The first driver DR1 also causes each of the light sources it is responsible for to emit light at an amount of light set by the circuit device 100. This amount of light can be set independently for each light source. The same applies to the second driver DR2 to the n-th driver DRn.

[0019] The first driver DR1 detects failures of each light source it is responsible for. A light source failure is a state in which the driver is unable to turn the light source on or off or control the light intensity. Light source failures include, for example, open and short circuits of light-emitting elements. An open circuit of a light-emitting element is a state in which a light-emitting element is turned off or becomes uncontrollable at low light intensity due to a broken wire. The first driver DR1 detects open circuits of light-emitting elements, for example, by comparing the anode voltage of the light-emitting element with a threshold voltage for open circuit detection. A short circuit of a light-emitting element is a state in which a light-emitting element is turned on or becomes uncontrollable at high light intensity due to a short circuit in the power supply or the like. The first driver DR1 detects short circuits, for example, by comparing the anode voltage of the light-emitting element with a threshold voltage for short circuit detection. Alternatively, a light source failure may be an abnormal light intensity of the light-emitting element. An abnormal light intensity is a state in which the light intensity is lower or higher than normal. The first driver DR1 detects abnormal light intensity of the light-emitting element by detecting the current flowing through the light-emitting element or using a light sensor or the like.

[0020] The first driver DR1 to the n-th driver DRn are connected in a cascade communication manner. That is, the first driver DR1 receives input data SDI, such as light source control data, from the processing device 310 and transmits the input data SDI to the second driver DR2. This process is repeated up to the n-th driver DRn, thereby transmitting the input data SDI to the first driver DR1 to the n-th driver DRn. The first driver DR1 also transmits output data, such as light source failure information, to the second driver DR2. The second driver DR2 adds the transmission data of the second driver DR2 to the transmission data of the first driver DR1 and transmits the combined data to the third driver DR3. This process is repeated up to the n-th driver DRn. The n-th driver DRn transmits output data SDO, including the output data of the first driver DR1 to the n-th driver DRn, to the processing device 310. Note that the communication connection method between the processing device 310 and the first driver DR1 to the n-th driver DRn is not limited to the above, and various communication connection methods may be adopted.

[0021] The display panel 340 is, for example, a liquid crystal display panel. The liquid crystal display panel may be either a transmissive type or a reflective type. The display unit 300 includes a display controller and a display driver (not shown). Display Controller outputs a timing control signal for controlling the display timing to the display driver together with the output image data IMB from the output circuit 130. The display driver drives the display panel 340 based on the output image data IMB and the timing control signal, and causes the display panel 340 to display an image based on the output image data IMB. Note that the function of the display controller may be built into the circuit device 100.

[0022] 3 shows a first detailed configuration example of the circuit device 100. The circuit device 100 includes an input circuit 105, a color correction circuit 115, a luminance analysis circuit 125, an output circuit 130, a dimming circuit 135, a light amount abnormality detection circuit 145, a light source control circuit 180, and a light source interface circuit 192.

[0023] The input circuit 105 receives input image data IMA from the processing device 200. The input circuit 105 may be a receiving circuit for various communication interfaces, examples of which include LVDS, DVI, DisplayPort, GMSL, and GVIF. LVDS stands for Low Voltage Differential Signaling, DVI stands for Digital Visual Interface, and GMSL stands for Gigabit Multimedia Serial Link. Abbreviation for and GVIF stands for Gigabit Video InterFace.

[0024] The light source interface circuit 192 communicates with the light source driver 320 via the processing device 310 of the display unit 300. The light source interface circuit 192 may be any of various communication interfaces used for communication between circuit devices, such as SPI or I2C. SPI stands for Serial Peripheral Interface. I2C stands for Inter Integrated Circuit. Note that the light source interface circuit 192 and the host interface circuit 191 are not limited to being separate interface circuits, and may be a single common interface circuit.

[0025] The abnormal light amount detection circuit 145 acquires fault information LE for each light source of the backlight 330 from the light source driver 320 via the processing device 310 and the light source interface circuit 192. The fault information LE includes information indicating the position of each light source in the backlight 330 and information indicating whether each light source is normal, in an open state, in a short state, or has an abnormal light amount. Based on the fault information LE, the abnormal light amount detection circuit 145 Light intensity The light intensity abnormality detection circuit 145 detects an abnormality and outputs the detection result LDET to the dimming circuit 135. That is, when the light intensity abnormality detection circuit 145 receives failure information LE including information about an abnormal light source, it outputs information indicating the position of the abnormal light source and information indicating whether the abnormal light source is in an open state, a short state, or an abnormal light amount.

[0026] The luminance analysis circuit 125 analyzes the luminance of the input image data IMA and outputs the analysis result as luminance information YA. An example of the luminance information YA is a luminance image indicating the luminance value of each pixel, or the luminance value of each area illuminated by each light source of the backlight 330.

[0027] The light control circuit 135 adjusts the brightness of each light source of the backlight 330 based on the brightness information YA. For example, the light control circuit 135 turns off the light source corresponding to the area of ​​black data in the brightness information YA. Alternatively, the light control circuit 135 may perform local dimming control to adjust the light intensity of each light source based on the brightness information YA of the area illuminated by each light source. In addition, the light control circuit 135 Light intensity Based on the abnormality detection result LDET, the light intensity of normal light sources around the abnormal light source is adjusted to compensate for the insufficient or excessive light intensity in the area illuminated by the abnormal light source. The dimming circuit 135 outputs light intensity information DIM for each light source determined by dimming and light intensity compensation.

[0028] The light source control circuit 180 transmits light source control data based on the light intensity information DIM of each light source to the light source driver 320 via the light source interface circuit 192 and the processing device 310. The light source control data is data for controlling the on / off or light intensity of each light source of the backlight 330.

[0029] The color correction circuit 115 performs color correction on the input image data IMA based on the light intensity information DIM of each light source. Color correction involves correcting the color data of each RGB color. Color correction based on the light intensity information DIM mainly involves correcting the luminance value of each pixel of the input image data IMA based on the light intensity information DIM. However, if the color balance changes depending on the light intensity, color correction may be performed to cancel this. The color correction circuit 115 color corrects the input image data IMA so that the displayed image on the display unit 300 does not change substantially even when the light intensity of each light source is adjusted. In other words, color correction is performed so that the appearance when the backlight 330 emits uniform light and the input image data IMA is displayed as is is substantially the same as the appearance when the light intensity of each light source of the backlight 330 is adjusted and the image data is color corrected.

[0030] The output circuit 130 transmits the image data from the color correction circuit 115 as output image data IMB to the display unit 300. The output circuit 130 may be a transmission circuit of various communication interfaces, and examples include a transmission circuit of LVDS, DVI, DisplayPort, GMSL, or GVIF.

[0031] The color correction circuit 115, the luminance analysis circuit 125, the dimming circuit 135, the abnormal light amount detection circuit 145, and the light source control circuit 180 are logic circuits. Each of these circuits may be configured as an individual logic circuit, or may be configured as an integrated logic circuit using automatic placement and routing or the like. Some or all of these circuits may be realized by a processor such as a DSP. DSP stands for Digital Signal Processor. In this case, a program or instruction set describing the function of each circuit is stored in memory, and the function of each circuit is realized by the processor executing the program or instruction set.

[0032] In the above, the circuit device 100 performs dimming control such as local dimming. Light intensity We have explained an example of dealing with abnormalities, but without performing dimming control such as local dimming, Light intensityCountermeasures may be taken to deal with the abnormality, in which case the luminance analysis circuit 125 may be omitted.

[0033] 3. Detailed example of processing performed by the circuit device of the first detailed configuration example A detailed example of the processing performed by the circuit device 100 of the first detailed configuration example will be described below. In the following, an example in which a plurality of light sources 332 of the backlight are arranged in a matrix will be described.

[0034] FIG. 4 is a diagram illustrating the correspondence between malfunction information and the light source position on the display panel. As shown in the left diagram, the column number of the light source matrix is ​​i, the row number is j, and the light source position on the backlight is indicated as (i, j). i and j are integers equal to or greater than 1. FIG. 4 shows an example in which the light source at (3, 2) is an abnormal light source. The malfunction information acquired by the light intensity abnormality detection circuit 145 includes the position (3, 2) of the abnormal light source and a flag indicating whether the abnormal light source is in an open state, a short state, or an abnormal light intensity. Note that there may be two or more abnormal light sources.

[0035] As shown in the right diagram of Fig. 4, in a plan view of the display panel, the backlight is arranged overlapping the back surface of the display panel. Light source 332 illuminates area 333 on the display panel. The size of area 333 may be fixed or may change depending on the amount of light from light source 332. Although only one area 333 is shown in the right diagram of Fig. 4, there is an area corresponding to each light source 332.

[0036] The pixel coordinates on the display panel are indicated by (x, y). x is the coordinate in the horizontal scanning direction, and y is the coordinate in the vertical scanning direction. The horizontal scanning direction is assumed to be parallel to the rows of the light source matrix. In this case, in a planar view, the light source position (i, j) on the backlight corresponds to the pixel coordinates (x, y) on the display panel. Based on this correspondence, the position information acquisition circuit 160 converts the anomalous light source position (3, 2) into a light source position on the display panel.

[0037] 5 shows a first example of processing performed by the circuit device 100 of the first detailed configuration example when an abnormality in the amount of light occurs. Here, an example of processing is shown when a light-emitting element is turned off due to an open circuit. A similar process can be taken when an abnormality occurs in which the light-emitting element is dimmer than normal.

[0038] An example of fault information is shown in the upper left. Each circle represents a light source, and the number inside the circle represents the open fault flag. "0" indicates that the light source is normal, and "1" indicates that the light source is open.

[0039] An example of light intensity compensation is shown in the upper middle row. The dimming circuit 135 increases the light intensity of eight light sources surrounding the abnormal light source. These light sources whose light intensity is adjusted are referred to as adjustment-target light sources. When the backlight 330 is emitting light at a flat rate, the dimming circuit 135 increases the light intensity of the adjustment-target light sources based on that light intensity. Alternatively, when dimming such as local dimming is performed, the dimming circuit 135 increases the light intensity of the adjustment-target light sources based on the light intensity determined by the dimming. Note that in addition to the eight light sources surrounding the abnormal light source, light sources further surrounding them may also be included in the adjustment-target light sources.

[0040] The middle bottom row shows the lighting luminance on the display panel at the AA' cross section in the middle top row. The AA' cross section is a cross section along the x-coordinate direction of the display panel. BF1 shows the luminance distribution before light intensity adjustment. The lighting luminance on the display panel has decreased in the area corresponding to the anomalous light source that was turned off due to an open fault. AF1 shows the luminance distribution after light intensity adjustment. As the light intensity of the light source to be adjusted has increased, the lighting luminance on the display panel has increased in the area corresponding to the anomalous light source and the area corresponding to the light source to be adjusted.

[0041] An example of color correction is shown in the upper right corner. Each square indicated by a dotted line indicates an area on the display panel illuminated by a light source. Although FIG. 5 shows that the areas of each light source do not overlap, the areas of each light source may overlap. The color correction circuit 115 performs color correction to increase the luminance of image data in an area corresponding to an abnormal light source that has been turned off due to an open circuit fault. The color correction circuit 115 also performs color correction to decrease the luminance of image data in an area corresponding to a light source to be adjusted. Note that if the illumination luminance in the area corresponding to the abnormal light source is sufficiently compensated for, the color correction circuit 115 does not need to correct the luminance of the image data in that area.

[0042] When dimming such as local dimming is performed, color correction that increases or decreases the brightness of image data means increasing or decreasing the brightness based on the image data after color correction according to the dimming. However, since the dimming circuit 135 outputs light intensity information DIM for each light source that combines dimming and light intensity compensation, the color correction circuit 115 only needs to perform color correction according to the dimming and light intensity compensation based on the light intensity information DIM for each light source. Figure 5 shows only the color correction according to the light intensity compensation.

[0043] The lower right shows the brightness of the image data after brightness adjustment in the BB' cross section in the upper right. BB' The cross section is taken along the x-coordinate direction of the display panel. As shown in the lower middle and lower right sections, the luminance of the image data increases in areas where the illumination luminance has decreased, and decreases in areas where the illumination luminance has increased. The user sees the result of combining the image displayed on the display panel 340 based on the image data with the illumination from the backlight 330, so the results of the color correction and the light intensity compensation cancel each other out. This makes it possible to provide a natural display image as if there is no abnormality in the light source, even if an abnormality has occurred in the light source.

[0044] 6 shows a second example of processing performed by the circuit device 100 of the first detailed configuration example when an abnormality in the amount of light occurs. Here, an example of processing is shown for when a light-emitting element becomes uncontrollable in a lit state due to a short circuit. A similar process can be performed when the light-emitting element is abnormally brighter than normal.

[0045] An example of fault information is shown in the upper left. Each circle indicates a light source, and the number inside the circle indicates the short fault flag. "0" indicates that the light source is normal, and "1" indicates that the light source is shorted.

[0046] An example of light intensity compensation is shown in the upper middle row. The dimming circuit 135 reduces the light intensity of eight light sources to be adjusted around the abnormal light source. When the backlight 330 is emitting light at a flat rate, the dimming circuit 135 reduces the light intensity of the light sources to be adjusted based on that light intensity. Alternatively, when dimming such as local dimming is performed, the dimming circuit 135 reduces the light intensity of the light sources to be adjusted based on the light intensity determined by that dimming.

[0047] The bottom middle row shows the illumination luminance on the display panel at the CC' cross section in the top middle row. The CC' cross section is a cross section along the x-coordinate direction of the display panel. BF2 shows the luminance distribution before light intensity adjustment. Lighting The lighting luminance on the display panel has increased in the area corresponding to the abnormal light source. AF2 shows the luminance distribution after light intensity adjustment. As the light intensity of the light source to be adjusted has decreased, the lighting luminance on the display panel has decreased in the area corresponding to the abnormal light source and in the area corresponding to the light source to be adjusted.

[0048] An example of color correction is shown in the upper right corner. Each square indicated by a dotted line indicates an area on the display panel illuminated by a light source. Although FIG. 6 shows that the areas of each light source do not overlap, the areas of each light source may overlap. The color correction circuit 115 performs color correction to reduce the luminance of image data in an area corresponding to an abnormal light source that has been turned on due to a short circuit. The color correction circuit 115 also performs color correction to increase the luminance of image data in an area corresponding to a light source to be adjusted. Note that if the illumination luminance in the area corresponding to the abnormal light source is sufficiently compensated for, the color correction circuit 115 does not need to correct the luminance of the image data in that area.

[0049] The lower right panel shows the luminance of the image data after luminance adjustment in the DD' cross section in the upper right panel. The DD' cross section is a cross section along the x-coordinate direction of the display panel. As shown in the lower middle and lower right panels, the luminance of the image data decreases in areas where the illumination luminance has increased, and increases in areas where the illumination luminance has decreased. The user sees the result of combining the image displayed on the display panel 340 based on the image data with the illumination from the backlight 330, so the results of the color correction and the light intensity compensation cancel each other out. This makes it possible to provide a natural display image as if there is no abnormality in the light source, even if there is an abnormality in the light source.

[0050] In the above embodiment, the circuit device 100 is used in a display device 40. The display device 40 includes a display panel 340 and a backlight 330 having multiple light sources. A light source 332 from the multiple light sources is provided corresponding to each of multiple areas 333 of the display panel 340. The circuit device 100 includes a light intensity abnormality detection circuit 145, a dimming circuit 135, and a color correction circuit 115. The light intensity abnormality detection circuit 145 detects abnormal light intensity in each light source 332. The dimming circuit 135 performs light intensity compensation processing to compensate for the light intensity in the area corresponding to the abnormal light source by adjusting the light intensity of light sources other than the abnormal light source, which is the light source for which the abnormal light intensity has been detected. The color correction circuit 115 performs color correction, in accordance with the adjusted light intensity, on image data of the area corresponding to the adjustment target light source, which is the light source whose light intensity has been adjusted.

[0051] According to this embodiment, the light intensity of the area corresponding to the abnormal light source is compensated for, and color correction according to the adjusted light intensity is performed on the image data of the area corresponding to the light source to be adjusted. As a result, the results of the color correction and the light intensity compensation cancel each other out, so even if an abnormality occurs in the light source, a natural display image can be provided as if there is no abnormality in the light source.

[0052] In this embodiment, the light control circuit 135 performs light intensity compensation processing on the light sources around the abnormal light source among the plurality of light sources as light sources to be adjusted.

[0053] On the display panel 340, an area illuminated by a certain light source and an area illuminated by surrounding light sources usually overlap, so that the light intensity of the area corresponding to the abnormal light source is compensated for by adjusting the light intensity of the light sources surrounding the abnormal light source.

[0054] Furthermore, in this embodiment, when the light adjustment circuit 135 increases the light intensity of the light source to be adjusted, the color correction circuit 115 performs color correction to reduce the luminance of the image data in the area corresponding to the light source to be adjusted.

[0055] According to this embodiment, in the area corresponding to the light source to be adjusted, the increase in light intensity due to light intensity compensation and the decrease in image data luminance due to color correction cancel each other out, thereby providing a natural display image even if an open circuit or a light intensity reduction abnormality occurs in the light source.

[0056] Furthermore, in this embodiment, when the light adjustment circuit 135 reduces the amount of light from the light source to be adjusted, the color correction circuit 115 performs color correction to increase the luminance of the image data in the area corresponding to the light source to be adjusted.

[0057] According to this embodiment, in the area corresponding to the light source to be adjusted, the reduction in light intensity due to light intensity compensation and the increase in brightness of the image data due to color correction cancel each other out, thereby providing a natural display image even if the light source has a short circuit or an abnormal increase in light intensity.

[0058] In this embodiment, the light adjustment circuit 135 performs light adjustment control to control the light intensity of each light source 332 based on the image data of each area 333. The color correction circuit 115 performs color correction on the image data of each area based on the light intensity controlled by the light adjustment control.

[0059] According to this embodiment, it is possible to perform dimming control such as local dimming. The light intensity compensation and the accompanying color correction are similar to the light intensity control in dimming control and the color correction of image data according to the light intensity control. Therefore, the dimming circuit 135 and the color correction circuit 115 used for dimming control can be used together for light intensity compensation and the accompanying color correction.

[0060] In this embodiment, the circuit device 100 also includes a light source interface circuit 192. The light source interface circuit 192 performs interface processing with a light source driver 320 that drives a plurality of light sources. The light amount abnormality detection circuit 145 acquires failure information LE of each light source 332 from the light source driver 320 via the light source interface circuit 192, and determines whether the abnormal light amount detection circuit 145 detects the abnormal light amount based on the failure information LE. Light intensity Detect anomalies.

[0061] According to this embodiment, the light intensity abnormality detection circuit 145 can acquire the failure information LE of each light source detected by the light source driver 320 via the light source interface circuit 192. Then, the light intensity abnormality detection circuit 145 can detect a light intensity abnormality based on the failure information LE.

[0062] In this embodiment, the failure information LE includes at least one of open information and short information of the light emitting elements of each light source 332.

[0063] According to this embodiment, the light amount abnormality detection circuit 145 can detect whether the light emitting element of the light source in which an abnormality has occurred is open or shorted, thereby allowing the dimming circuit 135 to perform light amount compensation according to the nature of the abnormality.

[0064] 4. Head-up display device 7 shows a configuration example of a head-up display device 50 as an example of a display device including the circuit device 100 of this embodiment. The head-up display device 50 includes the circuit device 100, a display unit 300, and a projection optical system 52. Description of parts that are the same as those in the configuration example of FIG. 1 will be omitted.

[0065] The circuit device 100 performs distortion correction on the image data received from the processing device 200 and transmits the distortion-corrected image data to the display unit 300. Distortion correction is image correction that applies image distortion to the image that is opposite to the image distortion that occurs when the image displayed on the display panel is projected, thereby creating a HUD display with no or reduced distortion. HUD stands for head-up display. Image distortion due to projection includes image distortion due to the curved surface of the screen 20, image distortion due to the projection optical system 52, or both.

[0066] The display unit 300 displays the distortion-corrected image data from the circuit device 100 on a display panel. A backlight emits light to the display panel. The projection optical system 52 includes a reflector and the like. The reflector reflects the light that has passed through the display panel toward the screen 20, and the light reflected by the screen 20 is incident on the user's eye 10. As a result, a virtual image corresponding to the image displayed on the display panel is projected into the user's field of vision. The screen 20 transmits light from the real space that is the background of the HUD display. As a result, the virtual image created by the HUD appears to be superimposed on the real space from the user's eye 10. The screen 20 is, for example, a windscreen of a vehicle equipped with the head-up display device 50.

[0067] 5 and 6 show an example in which there is one anomalous light source, but this embodiment can also be applied to cases in which there are multiple anomalous light sources. For example, if multiple anomalous light sources are scattered, light intensity compensation can be performed using light sources surrounding each anomalous light source, and image data can be color corrected in the light intensity-compensated area. Alternatively, if multiple anomalous light sources are adjacent to each other, light intensity compensation can be performed using light sources surrounding the multiple anomalous light sources, and image data can be color corrected in the light intensity-compensated area. For example, if one vertical row of light sources fails, light intensity compensation can be performed using light sources in two rows on either side of it, and image data can be color corrected in the light intensity-compensated area.

[0068] 5. Second detailed configuration example of circuit device 8 shows a second detailed configuration example of a circuit device 100 applicable to a head-up display device 50 or the like. The circuit device 100 includes an input circuit 105, a distortion correction circuit 110, a color correction circuit 115, a luminance analysis circuit 125, an output circuit 130, a dimming circuit 135, a light amount abnormality detection circuit 145, a light source control circuit 180, and a light source interface circuit 192. Explanation of parts similar to those in the configuration example of FIG. 3 will be omitted.

[0069] The distortion correction circuit 110 performs distortion correction on the input image data IMA using coordinate transformation between pixel coordinates in the input image data IMA and pixel coordinates in the distortion-corrected image data IMC, and outputs the result as distortion-corrected image data IMC. The distortion correction circuit 110 corresponds to a reverse warp engine or a forward warp engine. Reverse warp is a warp process that transforms pixel coordinates on the distortion-corrected image data IMC into corresponding reference coordinates and obtains pixel data of the distortion-corrected image data IMC from pixel data of the input image data IMA at those reference coordinates. Forward warp is a warp process that transforms pixel coordinates on the input image data IMA into corresponding destination coordinates and obtains pixel data of the distortion-corrected image data IMC at the destination coordinates from pixel data of the input image data IMA at those pixel coordinates. The coordinate transformations in reverse warp and forward warp are defined by warp parameters. The warp parameters are a table that associates coordinates on the input image data IMA with coordinates on the distortion-corrected image data IMC, a table that shows the amount of movement between coordinates on the input image data IMA and coordinates on the distortion-corrected image data IMC, or polynomial coefficients that associate coordinates on the input image data IMA with coordinates on the distortion-corrected image data IMC.

[0070] The luminance analysis circuit 125 analyzes the luminance of the distortion-corrected image data IMC, and outputs the analysis result as luminance information YA.

[0071] The dimming circuit 135 receives the brightness information YA and Light intensity Based on the abnormality detection result LDET, dimming and light intensity compensation are performed, and light intensity information DIM for each light source is output.

[0072] The color correction circuit 115 performs color correction on the distortion-corrected image data IMC based on the light intensity information DIM of each light source. The output circuit 130 transmits the image data from the color correction circuit 115 to the display unit 300 as output image data IMB.

[0073] 9 shows an example of processing performed by the circuit device 100 of the second detailed configuration example when an abnormality in the amount of light occurs. FIG. 9 illustrates an example of a case where a light-emitting element is turned off due to an open circuit.

[0074] As shown in the upper left diagram, pixel coordinates on the input image data IMA are indicated by (u, v). As shown in the upper middle diagram, pixel coordinates on the distortion-corrected image data IMC are indicated by (x, y). u and x are coordinates in the horizontal scanning direction, and v and y are coordinates in the vertical scanning direction. The distortion correction circuit 110 performs coordinate conversion between the coordinates (u, v) on the input image data IMA and the coordinates (x, y) on the distortion-corrected image data IMC, and maps the input image data IMA to the distortion-corrected image data IMC based on the result.

[0075] As shown in the lower diagram, the light control circuit 135 compensates for the amount of light from the abnormal light source with the surrounding light sources based on the failure flag.

[0076] As shown in the upper right diagram, the color correction circuit 115 performs color correction on the distortion-corrected image data IMC, and the output circuit 130 outputs the image data from the color correction circuit 115 as output image data IMB. Since color correction is performed after distortion correction, the areas on the distortion-corrected image data IMC corresponding to each light source can be considered to be the same as the areas on the output image data IMB corresponding to each light source.

[0077] The same applies to light control such as local dimming based on the results of luminance analysis. That is, since the target of luminance analysis is the distortion-corrected image data IMC, the area corresponding to each light source in the luminance information can be considered to be the same as the area corresponding to each light source on the output image data IMB.

[0078] In the above-described embodiment, the circuit device 100 includes a distortion correction circuit 110. The distortion correction circuit 110 performs distortion correction on input image data IMA and outputs distortion-corrected image data IMC. The color correction circuit 115 receives the distortion-corrected image data IMC as image data and performs color correction on the distortion-corrected image data IMC.

[0079] According to this embodiment, color correction is performed after distortion correction, so the areas corresponding to each light source on the distortion-corrected image data IMC can be considered to be the same as the areas corresponding to each light source on the display panel, eliminating the need to consider distortion correction during color correction.

[0080] 6. Third detailed configuration example of circuit device 10 shows a third detailed configuration example of the circuit device 100 applicable to the head-up display device 50 or the like. The circuit device 100 includes an input circuit 105, a distortion correction circuit 110, a color correction circuit 115, a luminance analysis circuit 125, an output circuit 130, a dimming circuit 135, a light amount abnormality detection circuit 145, a light source control circuit 180, and a light source interface circuit 192. Figure 8 The description of the same parts as in the configuration example of (1) will be omitted.

[0081] The luminance analysis circuit 125 analyzes the luminance of the input image data IMA and outputs the analysis result as luminance information YA.

[0082] The dimming circuit 135 receives the brightness information YA and Light intensity Based on the abnormality detection result LDET, dimming and light intensity compensation are performed, and light intensity information DIM for each light source is output.

[0083] The color correction circuit 115 performs color correction on the input image data IMA based on the light intensity information DIM of each light source, and outputs color-corrected image data IMD.

[0084] The distortion correction circuit 110 performs distortion correction on the color-corrected image data IMD using coordinate conversion between pixel coordinates in the color-corrected image data IMD and pixel coordinates in the output image data IMB. The output circuit 130 transmits the image data from the distortion correction circuit 110 to the display unit 300 as output image data IMB.

[0085] 11 shows an example of processing performed by the circuit device 100 of the third detailed configuration example when an abnormality in the amount of light occurs. FIG. 11 illustrates an example of a case where a light-emitting element is turned off due to an open circuit.

[0086] As shown in the lower diagram, the light control circuit 135 compensates for the amount of light from the abnormal light source with the surrounding light sources based on the failure flag.

[0087] As shown in the upper left and middle diagrams, the color correction circuit 115 performs color correction on the input image data IMA and outputs color-corrected image data IMD. The pixel coordinates of the color-corrected image data IMD are indicated by (u, v).

[0088] As shown in the upper right diagram, pixel coordinates on the output image data IMB are indicated by (x, y). The distortion correction circuit 110 performs coordinate conversion between the coordinates (u, v) on the color-corrected image data IMD and the coordinates (x, y) on the output image data IMB, and maps the color-corrected image data IMD to the output image data IMB based on the result.

[0089] As shown in the upper left to right diagrams, color correction is performed before distortion correction, so the areas corresponding to each light source on the input image data IMA, which are the target of color correction, differ from the areas corresponding to each light source on the output image data IMB. The areas corresponding to each light source on the input image data IMA are referred to as input image areas. The color correction circuit 115 determines the input image area based on the correspondence between (u, v) and (x, y) in distortion correction. The color correction circuit 115 acquires, for example, correspondence information between (u, v) and (x, y) from the distortion correction circuit 110. Alternatively, a storage circuit (not shown) may store table information indicating the correspondence between (u, v) and (x, y), and the color correction circuit 115 may determine the input image area based on the table information.

[0090] The same applies to dimming such as local dimming based on the results of luminance analysis. That is, since the target of luminance analysis is the input image data IMA, the area corresponding to each light source in the luminance information is different from the area corresponding to each light source on the output image data IMB. The dimming circuit 135 determines the area corresponding to each light source in the luminance information based on the correspondence between (u, v) and (x, y) in distortion correction.

[0091] In this embodiment, the circuit device 100 also includes a distortion correction circuit 110. The distortion correction circuit 110 performs distortion correction on the color-corrected image data IMD output by the color correction circuit 115 and outputs the distortion-corrected image data. The color correction circuit 115 receives input image data IMA as image data. In the distortion-corrected image data, an area corresponding to the light source to be adjusted corresponds to the input image side area in the input image data IMA in the distortion correction. At this time, the color correction circuit 115 performs color correction on the input image data IMA of the input image side area and outputs the color-corrected image data IMD to the distortion correction circuit 110.

[0092] According to this embodiment, color correction is performed before distortion correction, so the input image area corresponding to each light source on the color-corrected image data IMD differs from the area on the display panel corresponding to each light source. Since the coordinates in the color-corrected image data IMD and the coordinates on the display panel are associated with each other during distortion correction, the color correction circuit 115 can determine the association between the input image area and the area on the display panel corresponding to each light source.

[0093] 10, the distortion-corrected image data corresponds to the output image data IMB, and is output from the output circuit 130 to the outside of the circuit device 100. However, without being limited to the configuration of FIG. 10, a circuit for performing some kind of image processing may be further provided between the distortion correction circuit 110 and the output circuit 130.

[0094] 7. Fourth detailed configuration example of circuit device 12 shows a fourth detailed configuration example of the circuit device 100. The circuit device 100 includes an input circuit 105, a color correction circuit 115, a luminance analysis circuit 125, an output circuit 130, a dimming circuit 135, an abnormal light amount detection circuit 145, an undercompensation detection circuit 155, a light source control circuit 180, a host interface circuit 191, and a light source interface circuit 192. Description of parts similar to those in the configuration example of FIG. 3 will be omitted. Note that while FIG. 12 shows an example in which the undercompensation detection circuit 155 and the host interface circuit 191 are combined with the first detailed configuration example, they may also be combined with the second or third detailed configuration example.

[0095] The undercompensation detection circuit 155 detects undercompensation of the light amount based on information from the dimming circuit 135. As an example, the undercompensation detection circuit 155 determines that the light amount is undercompensated when the light sources around the abnormal light source are close to the maximum light amount and therefore cannot increase the light amount, or when the light sources around the abnormal light source are close to the minimum light amount and therefore cannot decrease the light amount.

[0096] The host interface circuit 191 communicates with the processing device 200, which is the host of the circuit device 100. The host interface circuit 191 may be any of various communication interfaces used for communication between circuit devices, such as SPI or I2C. Note that the host interface circuit 191 and the light source interface circuit 192 are not limited to being separate interface circuits, and may be a single common interface circuit.

[0097] When the undercompensation detection circuit 155 detects undercompensation of the light amount, the host interface circuit 191 notifies the processing device 200 of that information. When the processing device 200 is notified of undercompensation of the light amount, it may send a display notifying the occurrence of an abnormality to the circuit device 100 in addition to the input image data IMA. Alternatively, when the undercompensation detection circuit 155 detects undercompensation of the light amount, the output circuit 130 of the circuit device 100 may send a display notifying the occurrence of an abnormality to the display device 40 in addition to the output image data IMB.

[0098] In the above-described embodiment, the circuit device 100 includes a host interface circuit 191. The host interface circuit 191 outputs an error signal to the host when compensation for the light intensity in the area corresponding to the abnormal light source is insufficient even after light intensity compensation processing has been performed.

[0099] According to this embodiment, even if the light intensity compensation process is performed, if the compensation of the light intensity in the area corresponding to the abnormal light source is insufficient, the host can execute a process to address the insufficient compensation. Note that in the example of Fig. 12, the host corresponds to the processing device 200.

[0100] The circuit device of the present embodiment described above is used in a display device. The display device includes a display panel and a backlight having multiple light sources. Each of the multiple light sources is provided corresponding to one of multiple areas of the display panel. The circuit device includes an abnormal light amount detection circuit, a dimming circuit, and a color correction circuit. The abnormal light amount detection circuit detects abnormal light amount in each light source. The dimming circuit performs a light amount compensation process to compensate for the light amount in the area corresponding to the abnormal light source by adjusting the light amount of light sources other than the abnormal light source, which is the light source in which the abnormal light amount has been detected. The color correction circuit performs color correction according to the adjusted light amount on image data of the area corresponding to the adjustment target light source, which is the light source whose light amount has been adjusted.

[0101] According to this embodiment, the light intensity of the area corresponding to the abnormal light source is compensated for, and color correction according to the adjusted light intensity is performed on the image data of the area corresponding to the light source to be adjusted. As a result, the results of the color correction and the light intensity compensation cancel each other out, so even if an abnormality occurs in the light source, a natural display image can be provided as if there is no abnormality in the light source.

[0102] In this embodiment, the light control circuit may perform light intensity compensation processing by treating light sources around the abnormal light source among the plurality of light sources as light sources to be adjusted.

[0103] In a display panel, an area illuminated by a certain light source and an area illuminated by surrounding light sources usually overlap, so by adjusting the light intensity of the light sources surrounding the abnormal light source, the light intensity of the area corresponding to the abnormal light source is compensated for.

[0104] In addition, in this embodiment, when the dimming circuit increases the light intensity of the light source to be adjusted, the color correction circuit may perform color correction to reduce the brightness of the image data in the area corresponding to the light source to be adjusted.

[0105] According to this embodiment, in the area corresponding to the light source to be adjusted, the increase in light intensity due to light intensity compensation and the decrease in image data luminance due to color correction cancel each other out, thereby providing a natural display image even if an open circuit or a light intensity reduction abnormality occurs in the light source.

[0106] In addition, in this embodiment, when the dimming circuit reduces the light intensity of the light source to be adjusted, the color correction circuit may perform color correction to increase the brightness of the image data in the area corresponding to the light source to be adjusted.

[0107] According to this embodiment, in the area corresponding to the light source to be adjusted, the reduction in light intensity due to light intensity compensation and the increase in brightness of the image data due to color correction cancel each other out, thereby providing a natural display image even if the light source has a short circuit or an abnormal increase in light intensity.

[0108] In this embodiment, the light adjustment circuit may perform light adjustment control to control the light intensity of each light source based on the image data of each area, and the color correction circuit may perform color correction on the image data of each area based on the light intensity controlled by the light adjustment control.

[0109] According to this embodiment, it is possible to perform dimming control such as local dimming. The light intensity compensation and the accompanying color correction are similar to the light intensity control in dimming control and the color correction of image data according to the light intensity control. Therefore, the dimming circuit and color correction circuit used for dimming control can be used together for light intensity compensation and the accompanying color correction.

[0110] In this embodiment, the circuit device may include a distortion correction circuit. The distortion correction circuit may perform distortion correction on input image data and output distortion-corrected image data. The color correction circuit may receive the distortion-corrected image data as image data and perform color correction on the distortion-corrected image data.

[0111] According to this embodiment, color correction is performed after distortion correction, so that the areas corresponding to each light source on the distortion-corrected image data can be regarded as the same as the areas corresponding to each light source on the display panel, eliminating the need to consider distortion correction during color correction.

[0112] In this embodiment, the circuit device may also include a distortion correction circuit. The distortion correction circuit may perform distortion correction on the color-corrected image data output by the color correction circuit and output the distortion-corrected image data. The color correction circuit may receive input image data as image data. When an area in the distortion-corrected image data corresponding to the light source to be adjusted corresponds to an input image side area in the input image data in the distortion correction, the color correction circuit may perform color correction on the input image data in the input image side area and output the color-corrected image data to the distortion correction circuit.

[0113] According to this embodiment, color correction is performed before distortion correction, so the input image area corresponding to each light source on the color-corrected image data differs from the area on the display panel corresponding to each light source. Since the coordinates in the color-corrected image data and the coordinates on the display panel are associated during distortion correction, the color correction circuit can determine the correspondence between the input image area and the area on the display panel corresponding to each light source.

[0114] In this embodiment, the circuit device may also include a light source interface circuit. The light source interface circuit may perform interface processing with a light source driver that drives a plurality of light sources. The light amount abnormality detection circuit acquires failure information of each light source from the light source driver via the light source interface circuit, and detects the abnormal light amount based on the failure information. Light intensity Anomalies may be detected.

[0115] According to this embodiment, the abnormal light amount detection circuit can acquire the fault information of each light source detected by the light source driver via the light source interface circuit, and can detect the abnormal light amount based on the fault information.

[0116] In this embodiment, the failure information may include at least one of open information and short information of the light emitting element of each light source.

[0117] According to this embodiment, the light intensity abnormality detection circuit can detect whether the light emitting element of the light source in which an abnormality has occurred is open or shorted, thereby allowing the dimming circuit to perform light intensity compensation according to the nature of the abnormality.

[0118] In this embodiment, the circuit device may include a host interface circuit, which may output an error signal to the host when compensation for the light intensity in the area corresponding to the abnormal light source is insufficient even after the light intensity compensation process has been performed.

[0119] According to this embodiment, even if light intensity compensation processing is performed, if compensation for the light intensity in an area corresponding to an abnormal light source is insufficient, the host can execute processing to address the insufficient compensation.

[0120] The display device of this embodiment relates to a display device including any of the circuit devices described above, a display panel that displays an image based on image data, and a backlight.

[0121] Although the present embodiment has been described in detail above, it will be readily apparent to those skilled in the art that many modifications are possible without substantially departing from the novel features and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure. For example, a term described at least once in the specification or drawings together with a different term having a broader or equivalent meaning may be replaced with that different term anywhere in the specification or drawings. Furthermore, all combinations of the present embodiment and modifications are also included within the scope of the present disclosure. Furthermore, the configurations and operations of the circuit device, display unit, processing device, display device, head-up display device, etc. are not limited to those described in the present embodiment, and various modifications are possible. [Explanation of symbols]

[0122] 10...eye, 20...screen, 40...display device, 50...head-up display device, 52...projection optical system, 100...circuit device, 105...input circuit, 110...distortion correction circuit, 115...color correction circuit, 125...luminance analysis circuit, 130...output circuit, 135...dimming circuit, 145...light amount abnormality detection circuit, 155...compensation deficiency detection circuit, 160...position information acquisition circuit, 180...light source control circuit, 191...host interface circuit, 192...light source interface circuit, 200...processing device, 300...display unit, 310...processing device, 320...light source driver, 330...backlight, 332...light source, 333...area, 340...display panel

Claims

1. A circuit device used in a display device including a display panel and a backlight having a plurality of light sources, wherein each of the plurality of light sources is provided corresponding to each of a plurality of areas of the display panel, a light amount abnormality detection circuit for detecting an abnormality in the amount of light in each of the light sources; a light control circuit for controlling the light amount of each of the light sources based on the image data of each of the areas; a color correction circuit that performs color correction on the image data of each of the areas based on the amount of light controlled by the light adjustment control; Including, The dimming circuit includes: performing a light intensity compensation process for compensating for the light intensity of an area corresponding to the abnormal light source by adjusting the light intensity of a light source other than the abnormal light source, which is the light source in which the light intensity abnormality has been detected, with respect to the light intensity of each of the light sources controlled by the dimming control; The color correction circuit A circuit device characterized in that the light intensity of each of the light sources after the light intensity compensation process is input, and the color correction is performed based on the input light intensity of each of the light sources, thereby performing the color correction according to the adjusted light intensity on the image data of an area corresponding to the adjustment target light source, which is a light source whose light intensity has been adjusted.

2. 2. The circuit device according to claim 1, The dimming circuit includes: a circuit device that performs the light intensity compensation process on light sources surrounding the abnormal light source among the plurality of light sources as the adjustment target light sources;

3. 3. The circuit device according to claim 1, The color correction circuit A circuit device characterized in that, when the dimming circuit increases the light amount of the light source to be adjusted, the color correction is performed to reduce the brightness of the image data in the area corresponding to the light source to be adjusted.

4. 4. The circuit device according to claim 1, The color correction circuit A circuit device characterized in that, when the dimming circuit reduces the light amount of the light source to be adjusted, the color correction is performed to increase the brightness of the image data in the area corresponding to the light source to be adjusted.

5. 5. The circuit device according to claim 1, a distortion correction circuit that performs distortion correction on input image data and outputs distortion-corrected image data; The color correction circuit a circuit device that receives the distortion-corrected image data as the image data and performs the color correction on the distortion-corrected image data;

6. 5. The circuit device according to claim 1, a distortion correction circuit that performs distortion correction on the color-corrected image data output by the color correction circuit and outputs the distortion-corrected image data; The color correction circuit Input image data is input as the image data, A circuit device characterized in that, when an area in the distortion-corrected image data corresponding to the light source to be adjusted corresponds to an input image side area in the input image data in the distortion correction, the color correction is performed on the input image data of the input image side area, and the color-corrected image data is output to the distortion correction circuit.

7. 7. The circuit arrangement according to claim 1, a light source interface circuit for performing interface processing with a light source driver that drives the plurality of light sources; The light amount abnormality detection circuit a light source driver for receiving the fault information of each of the light sources via the light source interface circuit, and detecting the abnormality in the amount of light based on the fault information;

8. 8. The circuit device according to claim 7, The circuit device, wherein the failure information includes at least one of open circuit information and short circuit information of the light emitting element of each of the light sources.

9. 9. The circuit arrangement according to claim 1, a host interface circuit that outputs an error signal to a host when compensation for the amount of light in the area corresponding to the abnormal light source is insufficient even after the light amount compensation process is performed.

10. A circuit arrangement according to any one of claims 1 to 9; the display panel that displays an image based on the image data; the backlight; A display device comprising:

Images