JP2012098575A - Brightness unevenness adjustment method of display device, display device, and electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brightness unevenness adjustment method of a display device, which can prevent the occurrence of the lack of gradation even when correcting brightness unevenness due to difference of temperature characteristics, and to provide a display device and an electronic apparatus or the like.SOLUTION: The brightness unevenness adjustment method of a display device having a pixel formation region where a first pixel, a second pixel, a first sensor, and a second sensor are formed, includes: a first detection step of detecting a physical quantity corresponding to an operation temperature of the first pixel by the first sensor; a second step of detecting a physical quantity corresponding to an operation temperature of the second pixel by the second sensor; an image data correction step of correcting image data of each pixel on the basis of the physical quantity detected in the first detection step and the physical quantity detected in the second detection step; and a display control step of compensating for the number of gradations lost by correction of image data in the image data correction step, by adjusting the lighting time of each pixel.

Description

  The present invention relates to a method for adjusting luminance unevenness of a display device, a display device, an electronic apparatus, and the like.

  In recent years, liquid crystal display (LCD) panels using liquid crystal elements and organic light emitting diodes (hereinafter abbreviated as OLEDs) (light emitting elements in a broad sense) have been used as display elements. The display panel (display device) used has become widespread. In particular, it is said that a display panel using OLED can experience the same luminance as the LCD panel at a luminance of 75% to 80% with respect to the LCD panel. In a display panel using this OLED, the current consumption is approximately proportional to the luminance and the lighting time of the OLED is approximately inversely proportional to the lifetime, so that it is required to display with the luminance reduced as much as possible.

  However, in such a display panel, the operating temperature of the OLED constituting the pixel arranged in the center of the pixel formation region and the operating temperature of the OLED constituting the pixel arranged in the outer peripheral portion of the pixel forming region are Different. For this reason, the method of changing the luminance varies depending on the variation in temperature characteristics of the OLED, and even if the luminance is simply lowered, uneven luminance occurs.

  For example, Patent Literature 1 to Patent Literature 5 disclose a technique for correcting the luminance of a display panel using an OLED. Patent Document 1 discloses a technique in which a light sensor is disposed between a plurality of self-luminous pixel elements and the light output of the pixel element is controlled using a photometric value of the light sensor. Patent Document 2 includes a display panel including a light receiving element and a light source that emits light to the display panel. The light receiving element is used to detect the amount of light emitted from the light source, and the luminance of each pixel of the display panel is constant. A technique is disclosed in which the drive control of the light source is performed. Patent Document 3 includes a light emitting element and a light receiving element that detects leakage light of the light emitting element, and performs drive control of the light emitting element so that a relative luminance difference with time of each light emitting element becomes constant. Have been disclosed. In Patent Document 4, a light receiving sensor for measuring the light emission luminance of the light emitting element is provided on the back surface of the panel on which the light emitting element is disposed, and the luminance decrease due to deterioration with time is corrected using the light emission luminance measured by the light receiving sensor. Such a technique is disclosed. Patent Document 5 discloses a technique in which a screen portion of a panel is divided into a plurality of regions, each region is provided with a photosensor, and the light emission luminance of pixels belonging to the corresponding region is detected to correct a video signal. Is disclosed.

JP 2006-3904 A JP 2006-323311 A JP 2007-79200 A JP 2010-91703 A JP 2010-113229 A

  However, as disclosed in Patent Literature 1 to Patent Literature 5, if drive control or video signal correction is simply performed using the detection result of a light receiving element or the like, for example, gradation collapse that disappears by several gradations, for example. Will occur. As a result, there are problems that the number of gradations that can be expressed is reduced and the image quality is hindered.

  The present invention has been made in view of the above technical problems. According to some aspects of the present invention, it is possible to provide a method for adjusting luminance unevenness of a display device, a display device, an electronic apparatus, and the like that can prevent occurrence of gradation collapse even when luminance unevenness due to a difference in temperature characteristics is corrected. it can.

  (1) According to a first aspect of the present invention, there is provided a method for adjusting luminance unevenness of a display device having a pixel formation region in which each of a first pixel, a second pixel, a first sensor, and a second sensor is formed. First detection step of detecting a physical quantity corresponding to the operating temperature of the first pixel by the first sensor, and detecting a physical quantity corresponding to the operating temperature of the second pixel by the second sensor. A second detection step, an image data correction step for correcting image data of each pixel based on the physical quantity detected in the first detection step, and the physical quantity detected in the second detection step; A display control step of compensating for the number of gradations lost by the correction of the image data in the image data correction step by adjusting the lighting time of each pixel.

  According to this aspect, since the image data is corrected based on the physical quantity corresponding to the operating temperature of the plurality of pixels in the pixel formation region, it is possible to correct the luminance unevenness due to the difference in temperature characteristics. . In addition, according to this aspect, the number of gradations lost due to the correction of the image data is compensated by adjusting the lighting time, so even when correcting the luminance unevenness, the occurrence of gradation collapse is prevented and the display is performed. The image quality of the apparatus can be improved.

  (2) The brightness unevenness adjustment method for a display device according to the second aspect of the present invention is the first aspect wherein the physical quantity detected in the first detection step and the physical quantity detected in the second detection step are detected. A correction information generation step of generating correction information of the image data based on the physical quantity, wherein the image data correction step corrects the image data using the correction information generated in the correction information generation step. .

  According to this aspect, since the correction information of the image data is generated based on the physical quantity detected in the first detection step and the second detection step, the correction process of the image data of each pixel is simplified. Will be able to.

  (3) The brightness unevenness adjusting method for a display device according to the third aspect of the present invention is the first aspect or the second aspect, wherein the first detection step corresponds to the operating temperature of the first pixel. The second detection step detects the luminance of the pixel light of the second pixel as a physical quantity corresponding to the operating temperature of the second pixel. To do.

  According to this aspect, since the luminance of the pixel light of each pixel is adopted as the physical quantity detected in each detection step, the light receiving element can be adopted as the sensor, and the process of adjusting the luminance unevenness is simplified. Can be realized.

  (4) In the luminance unevenness adjusting method for a display device according to the fourth aspect of the present invention, in any one of the first aspect to the third aspect, the display control step is performed after the correction in the image data correction step. The image data corresponding to the first gradation value is output in the first frame corresponding to the image data, and the second gradation value is output in the second frame corresponding to the image data after the correction in the image data correction step. The image data corresponding to is output.

  In this aspect, the image data corresponding to the first gradation value is output in the first frame corresponding to the image data corrected by the image data correction unit, and the image data corrected by the image data correction unit is supported. Image data corresponding to the second gradation value is output in the second frame. Thus, in addition to the above-described effects, fine lighting control of the pixels can be performed with a simple process, and the number of gradations lost by the correction can be compensated, and a higher-definition gradation display can be performed.

  (5) In the luminance unevenness adjusting method for a display device according to the fifth aspect of the present invention, in any one of the first aspect to the fourth aspect, the second pixel is a plurality of colors constituting one pixel. Among the components, the pixel has the same color component as the color component of the first pixel.

  According to this aspect, in addition to the above effect, the luminance unevenness of one color component can be adjusted with higher accuracy.

  (6) A brightness unevenness adjusting method for a display device according to a sixth aspect of the present invention is the third sensor provided in the outer edge portion of the pixel formation region in any one of the first aspect to the fifth aspect. A third detection step of detecting a physical quantity corresponding to the operating temperature of the third pixel provided at the outer edge, wherein the image data correction step includes the physical quantity detected in the first detection step, The image data is corrected using at least two of the physical quantity detected in the second detection step and the physical quantity detected in the third detection step.

  According to this aspect, since the image data is corrected using the detection result of the outer edge portion of the pixel formation region in which the operating temperature changes rapidly, the luminance unevenness can be adjusted with higher accuracy.

  (7) According to a seventh aspect of the present invention, there is provided a display device that displays an image based on image data, the first pixel formed in the pixel formation region, and the pixel formation region. A first sensor for detecting a physical quantity corresponding to the operating temperature of one pixel; a second pixel formed in the pixel forming region; and an operation of the second pixel formed in the pixel forming region. An image that corrects image data of each pixel based on a second sensor that detects a physical quantity corresponding to temperature, a physical quantity detected by the first sensor, and a physical quantity detected by the second sensor A data correction unit, and a display control unit that compensates for the number of gradations lost by the correction by the image data correction unit by adjusting the lighting time of each pixel.

  According to this aspect, since the image data is corrected based on the physical quantity corresponding to the operating temperature of the plurality of pixels in the pixel formation region, it is possible to correct the luminance unevenness due to the difference in temperature characteristics. . In addition, according to this aspect, the number of gradations lost due to the correction of the image data is compensated by adjusting the lighting time, so that the occurrence of gradation collapse can be prevented even when the luminance unevenness is corrected. A display device that achieves high image quality can be provided.

  (8) In the display device according to an eighth aspect of the present invention, in the seventh aspect, the first sensor uses the pixel light of the first pixel as a physical quantity corresponding to the operating temperature of the first pixel. The second sensor detects the luminance of the pixel light of the second pixel as a physical quantity corresponding to the operating temperature of the second pixel.

  According to this aspect, since the luminance of the pixel light of each pixel is employed as the physical quantity detected in each detection step, the light receiving element can be employed as the sensor, and the configuration of the apparatus can be simplified and reduced. Cost can be reduced.

  (9) In the display device according to a ninth aspect of the present invention, in the seventh aspect or the eighth aspect, the display control unit is configured to display the pixel according to the image data corrected by the image data correction unit. Adjust the lighting time.

  According to this aspect, since the lighting time of the pixel is adjusted based on the corrected image data, the gradation collapse according to the degree of correction of the image data is compensated, and the lack of the gradation number is compensated. Will be able to. As a result, higher-definition gradation display is possible.

  (10) In the display device according to a tenth aspect of the present invention, in the ninth aspect, the display control unit is lit according to a frame rate corresponding to the image data corrected by the image data correction unit. A frame rate table storage unit for storing a frame rate table in which a frame is set is included, and the display control unit performs lighting control of the pixels based on the frame rate table.

  According to this aspect, since the frame rate table is provided and the lighting control of the pixels is performed according to the frame rate table, it is possible to compensate for gradation collapse due to adjustment of luminance unevenness with simple control.

  (11) A display device according to an eleventh aspect of the present invention is the back side of the display panel in which the first pixel and the second pixel are formed in any of the seventh aspect to the tenth aspect. In addition, the first sensor and the second sensor are provided.

  According to this aspect, it is possible to provide a display device that detects a physical quantity corresponding to the operating temperature of the first pixel and the second pixel with a simple configuration and achieves high image quality.

  (12) A display device according to a twelfth aspect of the present invention, in any one of the seventh aspect to the tenth aspect, is disposed adjacent to the pixel light of the first pixel and the first pixel. The first sensor is provided to detect the luminance of the pixel light of the first pixel and the luminance of the image light of the adjacent pixel. It has been.

  According to this aspect, in addition to the above effects, a display device having a simpler configuration can be provided.

  (13) A display device according to a thirteenth aspect of the present invention is the display device according to any one of the seventh aspect to the twelfth aspect, the third pixel provided in the outer edge portion of the pixel formation region, and the outer edge portion. And a third sensor for detecting a physical quantity corresponding to an operating temperature of the third pixel, wherein the image data correction unit is configured to detect the physical quantity detected by the first sensor, the second sensor The image data is corrected using at least two of the physical quantity detected by the third sensor and the physical quantity detected by the third sensor.

  According to this aspect, since the image data is corrected using the detection result of the outer edge portion of the pixel formation region in which the operating temperature changes rapidly, the luminance unevenness can be adjusted with higher accuracy.

  (14) In a fourteenth aspect of the present invention, an electronic device includes the display device according to any one of the seventh to thirteenth aspects.

  According to this aspect, it is possible to provide an electronic device capable of improving image quality by correcting luminance unevenness due to a difference in temperature characteristics and preventing occurrence of gradation collapse.

1 is a block diagram of a configuration example of a display system according to a first embodiment of the present invention. FIG. 2 is a circuit diagram of a configuration example of a pixel circuit in FIG. 1. The figure which shows typically the example of a fundamental structure of the light emitting element of FIG. Explanatory drawing of the detection area | region in 1st Embodiment. Explanatory drawing of the light receiving element provided in the detection area | region of FIG. FIG. 2 is a block diagram of a configuration example of the image processing apparatus in FIG. 1. FIG. 7 is a flowchart of a processing example of the image processing apparatus in FIG. 6. FIG. 7 is a flowchart of a processing example of the image processing apparatus in FIG. 6. Explanatory drawing of the timing of taking in luminance unevenness information of each color component. Explanatory drawing of the correction process of the image data in step S26. The block diagram of the structural example of the frame rate control part of FIG. Operation | movement explanatory drawing of the FRC part of FIG. The figure which shows the outline | summary of the frame rate table memorize | stored in the frame rate table memory | storage part of FIG. Explanatory drawing of the detection area | region in 2nd Embodiment. Explanatory drawing of the light receiving element provided in each detection area in 3rd Embodiment. FIGS. 16A and 16B are perspective views illustrating a configuration of an electronic device to which the display system including the display panel according to the first embodiment, the second embodiment, or the third embodiment is applied.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily indispensable configuration requirements for solving the problems of the present invention.

[First Embodiment]
FIG. 1 shows a block diagram of a configuration example of a display system according to the first embodiment of the present invention. The display system according to the first embodiment includes a display panel (light emitting panel) using an OLED that is a light emitting element as a display element. Each OLED is driven by a row driver and a column driver based on image data generated by the image processing apparatus and a display timing control signal.

  The display system 10 includes a display panel (display device) 20, a row driver 30, a column driver 40, a power supply circuit 50, a host 60, and an image processing device 100. In the display panel 20, a plurality of data signal lines d1 to dN (N is an integer of 2 or more) and a plurality of column signal lines c1 to cN extending in the Y direction are arranged in the X direction. Further, the display panel 20 is provided with a plurality of row signal lines r1 to rM (M is an integer of 2 or more) extending in the X direction so as to intersect with each data signal line and each column signal line. . In the display panel 20, pixel circuits (pixels in a broad sense) are formed at the intersections between the column signal lines and the row signal lines. The display panel 20 is a flat panel in which the plurality of pixel circuits are arranged in a matrix. Furthermore, the display panel 20 is provided with a plurality of light receiving elements (sensors in a broad sense) PD1 to PDL (L is an integer of 2 or more) in a pixel formation region 22 where a plurality of pixel circuits are formed. Each light receiving element is formed by a known phototransistor, detects the luminance (light quantity) of the pixel light of the pixel as a physical quantity corresponding to the operating temperature of the OLED constituting the corresponding pixel, and detects corresponding to the detected luminance Generate a signal. As the light receiving element, for example, a light receiving element with a polarizing plate can be employed.

  In FIG. 1, one dot is formed by the adjacent R component pixel circuit PR, G component pixel circuit PG, and B component pixel circuit PB in the X direction. The R component pixel circuit PR has an OLED that emits a red display color, the G component pixel circuit PG has an OLED that emits a green display color, and the B component pixel circuit PB has a blue color. An OLED that emits display color is included. Each light receiving element is provided so as to detect the light emission luminance of the OLED of each color component in each of a plurality of detection regions provided in the pixel formation region 22 of the display panel 20.

  The row driver 30 is connected to the row signal lines r <b> 1 to rM of the display panel 20. For example, the row driver 30 sequentially selects the row signal lines r1 to rM of the display panel 20 within one vertical scanning period, and outputs a selection pulse during the selection period of each row signal line. The column driver 40 is connected to the data signal lines d1 to dN and the column signal lines c1 to cN of the display panel 20. The column driver 40 applies a given power supply voltage to the column signal lines c1 to cN, and applies a gradation signal corresponding to image data for one line to each data signal line, for example, for each horizontal scanning period. To do.

  FIG. 2 is a circuit diagram showing a configuration example of the pixel circuit PR shown in FIG. FIG. 2 illustrates a configuration example of an electrical equivalent circuit of the pixel circuit PR. The pixel circuit PG and the pixel circuit PB that configure one pixel together with the pixel circuit PR can also have the same configuration as that of FIG. In addition, a pixel circuit constituting another pixel of the display panel 20 in FIG. 1 can have the same configuration as that in FIG.

  The pixel circuit PR is formed at the intersection of the row signal line rj and the column signal line ck. The pixel circuit PR includes a drive transistor TRjk, a switch transistor SWjk, a capacitor Cjk, and a light emitting element LRjk that is an OLED that emits a red display color. The row signal line rj is connected to the gate of the switch transistor SWjk, the source of the switch transistor SWjk is connected to the data signal line dk, and the gate of the drive transistor TRjk is connected to the drain of the switch transistor SWjk. The source of the driving transistor TRjk is connected to the anode of the light emitting element LRjk, and the drain of the driving transistor TRjk is connected to the column signal line ck. The cathode of the light emitting element LRjk is grounded. One end of the capacitor Cjk is connected to the gate of the driving transistor TRjk, and the other end of the capacitor Cjk is connected to the drain of the driving transistor TRjk.

  In such a configuration, a selection pulse is applied to the row signal line rj in the horizontal scanning period in which the j-th (1 ≦ j ≦ M, j is an integer) row is selected. Then, the switch transistor SWjk constituting the pixel circuit in the k-th row (1 ≦ k ≦ N, k is an integer) in the j-th row is turned on, and the voltage corresponding to the image data applied to the data signal line dk is set. Applied to the gate of the driving transistor TRjk. At this time, when a given power supply voltage is applied to the column signal line ck, the driving transistor TRjk is in a conductive state, a driving current flows through the light emitting element LRjk, and the light emitting element LRjk emits light of a red display color. Is done as follows.

  FIG. 3 schematically shows an example of the basic configuration of the light emitting element LRjk shown in FIG.

  In the light emitting element LRjk as an OLED, a transparent electrode (for example, ITO (Indium Thin Oxide)) to be the anode PEjk is formed on the glass substrate GLjk. A cathode NEjk is formed above the anode PEjk. And the organic layer containing a light emitting layer etc. is formed between anode PEjk and cathode NEjk. The organic layer includes a hole transport layer PHjk formed on the upper surface of the anode PEjk, a light emitting layer EMjk formed on the upper surface of the hole transport layer PHjk, and an electron transport formed between the light emitting layer EMjk and the cathode NEjk. Layer EHjk.

  For example, when a selection pulse is applied to the row signal line rj and a drain current is generated in the driving transistor TRjk in accordance with the applied voltage of the data signal line dk, a potential difference is provided between the anode PEjk and the cathode NEjk in FIG. . When a potential difference is provided between the anode PEjk and the cathode NEjk, holes from the anode PEjk and electrons from the cathode NEjk are recombined in the light emitting layer EMjk. The energy generated at this time causes the molecules of the light-emitting layer EMjk to be in an excited state, and the energy released when returning to the ground state becomes light. This light passes through the anode PEjk formed of a transparent electrode and the glass substrate GLjk.

  In this way, the image processing apparatus 100 supplies a display timing control signal to the row driver 30 and the column driver 40 that drive the OLED, and also supplies image data corresponding to the display image to the column driver 40. By doing so, the row driver 30 and the column driver 40 can supply an operation current corresponding to the image data to the OLEDs of the pixels constituting the scanning lines sequentially selected within one vertical scanning period.

  At this time, the image processing apparatus 100 acquires luminance unevenness information due to a temperature change or the like in the display panel 20 based on the detection result of the light emission luminance of the OLED by the light receiving elements PD1 to PDL. In the display panel 20, the operating temperature varies depending on the pixel position. Therefore, due to the temperature characteristics of the OLED, there is a difference between the luminance of the OLED at the center portion of the display panel 20 and the luminance of the OLED at the outer peripheral portion of the display panel 20. Therefore, the image processing apparatus 100 adjusts the luminance of the OLED corresponding to the pixel position in the display panel 20 by correcting the image data for each pixel based on the luminance unevenness information of the display panel 20. Furthermore, the image processing apparatus 100 performs frame rate control (hereinafter referred to as “FRC”) on the corrected image data in order to compensate for the number of gradations lost due to the adjustment of the luminance. A process for compensating the number of gradations is performed by controlling the lighting time of the OLED.

  In FIG. 1, the host 60 generates image data corresponding to a display image as an image data generation unit. Image data generated by the host 60 is sent to the image processing apparatus 100. The power supply circuit 50 generates a plurality of types of power supply voltages, and supplies the power supply voltages to each unit such as the display panel 20, the row driver 30, the column driver 40, and the image processing apparatus 100.

  In the first embodiment, the pixel formation region 22 of the display panel 20 is partitioned in the horizontal direction and the vertical direction to provide nine regions DR1 to DR9, and the luminance is detected in the detection region provided corresponding to each region. The

  FIG. 4 is an explanatory diagram of the detection areas AR1 to AR9 in the first embodiment. FIG. 4 schematically shows a plan view of the display panel 20 of FIG. 1 and a cross-sectional structure taken along a cross-sectional line (not shown) passing through the detection areas AR4 to AR6. FIG. 4 shows an example of a change in luminance when one color component is displayed with the same gradation corresponding to each position of the detection areas AR4 to AR6.

  Each of the detection areas AR1 to AR9 is provided in each of the areas DR1 to DR9. Each detection area includes at least an R component pixel, a G component pixel, and a B component pixel, and is an area in which the luminance of the R component, the G component, and the B component is detected. The R, G, and B component pixels whose luminance is detected may be selected to form one dot or may be selected to form a plurality of dots. For example, luminance unevenness information is constituted by the luminance detected in each of the detection regions AR1 to AR9 shown in FIG.

  FIG. 5 is an explanatory diagram of a light receiving element provided in the detection region of FIG. FIG. 5 shows an outline of the configuration of the light receiving elements in the detection areas AR4 and AR5, but the light receiving elements in the other detection areas can have the same configuration. FIG. 5 schematically shows a cross-sectional structure along a cross-sectional line (not shown) passing through the detection regions AR4 to AR6, as in FIG.

  In the first embodiment, a phototransistor as a light receiving element is provided on the back side of the display panel 20. This phototransistor is provided so as to receive the pixel light of the pixel of the color component to be detected among the R component, G component, and B component in the detection region. More specifically, assuming that the surface of the display panel 20 is the pixel light emission side, a phototransistor is provided on the back side of the display panel 20 facing the surface. At this time, it is desirable that the phototransistor is configured to receive the pixel light on the back side, for example, by providing an opening in a reflection film that reflects the pixel light of the pixel to be detected.

  The phototransistor has, for example, an NPN structure, a ground power supply voltage is supplied to the emitter, and a high-potential-side power supply voltage is supplied to the collector via a resistance circuit. When pixel light is irradiated to the base, a current corresponding to the pixel light flows and is output as a detection signal as a photoelectric conversion result to an A / D (Analog-to-Digital) conversion unit built in the image processing apparatus 100. The Such a high potential side power supply voltage and a low potential side power supply voltage are generated in the power supply circuit 50 or in the display panel 20. In addition, a resistance circuit connected to each phototransistor is provided in the display panel 20.

  In this way, the image processing apparatus 100 can acquire luminance unevenness information of the display panel 20 by acquiring the detection signal obtained for each color component in each of the detection areas AR1 to AR9. In the display panel 20, the temperature near the center is highest and the temperature tends to decrease toward the outer periphery. Therefore, when the same gradation is displayed, for example, the luminance in the detection area AR5 is the highest and the luminance in the detection areas AR4 and AR6 is lower. Based on such brightness unevenness information, the image processing apparatus 100 corrects brightness unevenness due to a difference in temperature characteristics of the OLED. Thereafter, the image processing apparatus 100 performs FRC on the corrected image data in order to compensate for the number of gradations lost by the correction.

  FIG. 6 shows a block diagram of a configuration example of the image processing apparatus 100 of FIG. The functions of the image processing apparatus 100 can be realized by hardware having the functions of the respective units in FIG. The image processing apparatus 100 includes a central processing unit (hereinafter referred to as CPU) and a memory, and the function of each unit in FIG. 6 is software that causes the CPU to execute processing corresponding to a program read from the memory. It may be realized by processing.

  The image processing apparatus 100 includes an A / D conversion unit 110, a luminance unevenness information storage unit 120, a luminance difference determination unit 130, a correction information generation unit 140, an image data correction unit 150, an FRC unit (display control unit) 160, and display timing control. Part 170. The A / D converter 110 converts detection signals (analog signals) in the detection areas AR1 to AR9 of the display panel 20 into digital signals. The luminance unevenness information storage unit 120 stores a plurality of digital signals converted by the A / D conversion unit 110 as luminance unevenness information in association with corresponding detection areas, color components, and gradation values. The luminance difference determination unit 130 determines the luminance difference in the regions DR1 to DR9 of the display panel 20 based on the luminance unevenness information stored in the luminance unevenness information storage unit 120. The correction information generation unit 140 generates correction information of the image data corresponding to the pixel position based on the luminance difference in the regions DR1 to DR9 determined by the luminance difference determination unit 130. The image data correction unit 150 corrects image data corresponding to the display image using the correction information generated by the correction information generation unit 140. The FRC unit 160 adjusts the lighting time of the OLED by performing FRC on the image data corrected by the image data correction unit 150, and compensates for the number of gradations lost by the correction. More specifically, the FRC unit 160 controls the lighting time for each pixel based on the image data corrected by the image data correction unit 150.

  The display timing control unit 170 generates a display timing control signal. As the display timing control signal, for example, there are a horizontal synchronization signal HSYNC that designates one horizontal scanning period, and a vertical synchronization signal VSYNC that designates a vertical scanning period. Further, display timing control is also performed for the start pulse STH in the horizontal scanning direction, the start pulse STV in the vertical scanning direction, the pixel clock DCLK synchronized with the image data of each pixel, the data enable signal DE corresponding to the effective period of the image data of each pixel, and the like. Included in the signal. The display timing control signal generated by the display timing control unit 170 is output to the row driver 30 and the column driver 40 in synchronization with the image data after FRC performed by the FRC unit 160.

  7 and 8 are flowcharts of processing examples of the image processing apparatus 100 in FIG. When the functions of the image processing apparatus 100 are realized by software processing, except for the function of the A / D conversion unit 110, programs corresponding to the steps in FIGS. 7 and 8 are stored in the memory, and the CPU This is realized by reading and executing the program.

  First, the image processing apparatus 100 determines whether or not it is the timing for capturing the R component luminance unevenness information (step S10). When it is determined that it is the timing of capturing the R component luminance unevenness information (step S10: Y), the image processing apparatus 100 captures the R component luminance unevenness information (step S12). At this time, the image processing apparatus 100 converts the detection signal from the light receiving element of the R component pixel in the detection regions AR1 to AR9 into a digital signal, and stores it in the luminance unevenness information storage unit 120 as the R component luminance unevenness information.

  For example, an R component pixel to be detected in the detection area AR4 is a first pixel, and a light receiving element that detects the luminance of pixel light of the pixel is a first sensor. In addition, for example, an R component pixel to be detected in the detection area AR5 is a second pixel, and a light receiving element that detects the luminance of pixel light of the pixel is a second sensor. The second pixel is a pixel (here, an R component pixel) having the same color component as that of the first pixel among a plurality of color components constituting one pixel. In step S12, as a first detection step, the luminance of the pixel light of the first pixel is detected by the first sensor as a physical quantity corresponding to the operating temperature of the first pixel, and a detection signal corresponding to the luminance is obtained. get. Further, as a second detection step, the luminance of the pixel light of the second pixel is detected by the second sensor as a physical quantity corresponding to the operating temperature of the second pixel, and a detection signal corresponding to the luminance is acquired. .

  When it is determined in step S10 that it is not the timing for capturing the luminance unevenness information for the R component (step S10: N), or following step S12, is the image processing apparatus 100 the timing for capturing the uneven luminance information for the G component? It is determined whether or not (step S14). When it is determined that it is the timing of capturing the luminance unevenness information of the G component (step S14: Y), the image processing apparatus 100 captures the luminance unevenness information of the G component (step S16). At this time, the image processing apparatus 100 converts the detection signal from the light receiving element of the G component pixel in the detection regions AR1 to AR9 into a digital signal, and stores it in the luminance unevenness information storage unit 120 as the luminance unevenness information of the G component.

  When it is determined in step S14 that it is not the timing of capturing the luminance unevenness information of the G component (step S14: N), or following step S16, the image processing apparatus 100 is the timing of capturing the luminance unevenness information of the B component It is determined whether or not (step S18). When it is determined that it is the timing for capturing the luminance unevenness information of the B component (step S18: Y), the image processing apparatus 100 captures the luminance unevenness information of the B component (step S20). At this time, the image processing apparatus 100 converts the detection signal from the light receiving element of the B component pixel in the detection areas AR1 to AR9 into a digital signal, and stores it in the luminance unevenness information storage unit 120 as B component luminance unevenness information.

  FIG. 9 is an explanatory diagram of the timing for capturing luminance unevenness information of each color component. In FIG. 9, the horizontal axis represents time, and the luminance unevenness information capture period for each color component is represented.

  When the luminance unevenness information capture timing comes, the image processing apparatus 100 causes the detection target pixels in each detection region to emit light with a predetermined gradation in the capture period starting from the capture timing. As a result, by detecting the pixel light of the detection target pixel with the corresponding light receiving element, a detection signal corresponding to the light emission luminance can be generated for each detection region. As illustrated in FIG. 9, the timing of capturing the luminance unevenness information of each color component may not be the same timing, or the timing of capturing the brightness unevenness information of each color component may be the same timing. In the capturing period, it is sufficient that the gradation of the pixel to be detected is known. Further, for example, an image in which only the R component is emitted at a predetermined gradation may be displayed during the period of capturing the luminance unevenness information of the R component. Alternatively, for example, an image in which only the G component is emitted at a predetermined gradation may be displayed during the period of taking in the luminance unevenness information of the G component. Alternatively, for example, an image in which only the B component is emitted at a predetermined gradation may be displayed in the period of taking in the luminance unevenness information of the B component.

  When it is determined in step S18 that it is not the timing of capturing the luminance unevenness information of the B component (step S18: N), or following step S20, the image processing apparatus 100 inputs image data of each pixel corresponding to the display image. (Step S22: N). When the image data of each pixel is input (step S22: Y), the image processing apparatus 100 performs a process for generating correction information of the image data (step S24, correction information generation step).

  In step S24, the image processing apparatus 100 reads the luminance unevenness information of each color component captured in step S12, step S16, or step S20 from the luminance unevenness information storage unit 120 (step S30). Thereafter, the image processing apparatus 100 performs a luminance difference (light amount difference) determination for each color component based on the luminance unevenness information read in step S30 (step S32). Then, the image processing apparatus 100 generates correction information of the image data according to the pixel position using the luminance difference determined in step S32 with reference to the pixel having the lowest luminance (step S34). In step S34, correction information corresponding to each pixel is obtained based on the interpolated luminance obtained by interpolating the luminance at the pixel positions of the plurality of detection regions on the basis of the luminance in the detection region with the lowest luminance among the detection regions AR1 to AR9. Is generated. Alternatively, in step S34, the correction information for the non-detection target pixel is generated by interpolating the correction information for the detection target pixel in the detection region with the lowest luminance among the detection regions AR1 to AR9.

  In FIG. 7, following step S24, the image processing apparatus 100 corrects the image data using the correction information corresponding to each pixel (step S26, image data correction step).

  FIG. 10 is an explanatory diagram of the image data correction processing in step S26. FIG. 10 schematically illustrates an example of the luminance of the R component detected in the detection regions AR1 to AR9 in the pixel formation region 22 of the display panel 20 in the vertical direction of the screen of the display panel 20 according to the size of each luminance. It is shown in In FIG. 10, the luminance of the pixels in each detection region is represented with the same gradation. When the luminance unevenness information of each color component is taken in, if light is emitted with a different gradation for each detection area, the luminance under the same gradation is calculated. For example, if it is assumed that the luminance is proportional to the gradation, the luminance under the same gradation can be easily calculated in each detection region.

  In the example shown in FIG. 10, the pixel to be detected in the detection area AR8 has the lowest luminance. In step S26 of FIG. 9, the image data is corrected so that the luminance of the detection target pixels in the other detection regions is matched with the minimum luminance as a reference. As a result, luminance variations due to temperature can be corrected from the luminance of the pixels in each detection region.

  Following step S26 in FIG. 7, the image processing apparatus 100 controls the lighting time for each pixel based on the image data corrected in step S26, and performs compensation processing for the number of gradations lost in step S26 ( Step S28, display control step (gradation number compensation step)). More specifically, in step S28, FRC is performed for each color component at a frame rate corresponding to the image data after correction in step S26, and the image data after FRC is output. Thereafter, the image processing apparatus 100 ends a series of processes (end).

  Such compensation processing of the number of gradations is performed in the FRC unit 160 of FIG.

  FIG. 11 is a block diagram showing a configuration example of the FRC unit 160 shown in FIG.

  The FRC unit 160 includes a frame rate generation unit 162, a frame rate table storage unit 164, an FRC processing unit 166, and an FRC counter 168. The frame rate generation unit 162 generates a frame rate corresponding to the image data corrected by the image data correction unit 150 for each pixel of each color component. Therefore, the frame rate table storage unit 164 stores, for each color component, a frame rate table in which frames to be lit are tabulated according to the frame rate corresponding to the image data corrected by the image data correction unit 150. ing. The frame rate generation unit 162 refers to the frame rate table stored in the frame rate table storage unit 164 and generates a frame rate in which a lighting frame and a non-lighting frame are designated for each color component. The FRC processing unit 166 performs lighting control of the light emitting elements of the OLED by performing FRC based on the frame rate generated by the frame rate generation unit 162, and outputs image data after FRC. As a result, the FRC unit 160 compensates for the number of gradations lost due to the image data correction performed by the image data correction unit 150. The FRC counter 168 counts the number of frames of the display-controlled image, and outputs a frame number FN for specifying the counted frame. The FRC processing unit 166 performs FRC using the frame number FN from the FRC counter 168.

  The FRC unit 160 having such a configuration operates as follows.

  FIG. 12 shows an operation explanatory diagram of the FRC unit 160 of FIG. In FIG. 11, the horizontal axis represents the R component gradation value corresponding to the image data before correction by the image data correction unit 150, and the vertical axis represents the R component gradation corresponding to the image data corrected by the image data correction unit 150. Represents a value. Although the R component is illustrated in FIG. 12, the same applies to the G component and the B component.

  There is a case where so-called gradation collapse occurs due to the correction of the image data by the image data correction unit 150. Assuming that the image data of each color component of RGB is composed of 8-bit data, the image data before correction has a color resolution of 256 gradations (0 gradations to 255 gradations) for each color component. At this time, for example, (R, G, B) = (253, 252, 248) is corrected as (R, G, B) = (255, 255, 255) as a result of the correction based on the correction information. In FIG. 12, this means that, for example, the R component is converted from T1 to T2. In this case, the R component is lost for two gradations, the G component is lost for three gradations, and the B gradation is lost for seven gradations.

Therefore, in order to realize gradation expression with 256 gradations, one gradation of each color component is as follows.
R = 254 / 256≈0.992 (1)
G = 253 / 256≈0.988 (2)
B = 249 / 256≈0.973 (3)

Here, when the 192 gradation (R192) of the R component is to be expressed, the image data corresponding to the gradation value represented by the following expression is used using the expression (1).
R192 = 0.992 × 192 = 190.464 (4)

  In Formula (4), it becomes higher by 0.464 with respect to 190 gradations. Therefore, for 0.464, the FRC unit 160 displays the 191 gradations, which are gradations one gradation higher than the predetermined number of frames Fs, at the rate of one frame, so that the gradation value of Expression (4) The gradation corresponding to is expressed. Specifically, the FRC unit 160 outputs image data corresponding to 191 gradations at a rate of 1 frame to the number of frames Fs obtained using the display time tp of each frame, and the remaining frames have 190 gradations. Control to output corresponding image data.

For example, when displaying at 60 frames per second, it is as follows.
tp = 1 / 60≈0.016 (5)
Fr = 0.464 / tp = 0.464 / 0.016≈29 (6)
Fs = 60 / Fr = 60 / 29≈2 (7)

  At this time, image data corresponding to 191 gradations is output at a rate of one frame per two frames, and image data corresponding to 190 gradations is output in the remaining frames. That is, the frame rate Fr is obtained in Equation (6). In the first embodiment, according to the frame rate Fr, which frame R191 is output and which frame R190 is output is specified in the frame rate table.

  FIG. 13 shows an outline of the frame rate table stored in the frame rate table storage unit 164 of FIG. FIG. 13 shows a frame rate table for the R component, but the same applies to the frame rate tables for the G component and the B component. In FIG. 13, only “1” and “0” are shown in part, but “1” and “0” are appropriately set in the remaining part.

In this frame rate table, when displaying at 60 frames per second, corresponding to the frame rate Fr, the gradation that is to be displayed in the frame specified by the frame number FN (in this case, 191 gradations) Is specified. For example, when R192 is displayed, since the frame rate Fr is “29”, a logical sum operation is performed on each frame for “20” and “9”. Image data corresponding to 191 gradations (first gradation values) is output in a frame (first frame) where the logical sum operation result is “1”, and a frame (second frame) where the logical sum operation result is “0”. Image data corresponding to 190 gradations (second gradation value) is output.
Frames that output R191: 0, 3, 5, 6, 9, 11, 12, 15, 17,.
Frames for outputting R190: 1, 2, 4, 7, 8, 10, 13, 14, 16,.

  As described above, the FRC unit 160 outputs the image data corresponding to the first gradation value in the first frame corresponding to the image data corrected by the image data correction unit 150. Then, the FRC unit 160 can output image data corresponding to the second gradation value in the second frame corresponding to the image data corrected by the image data correction unit 150.

  Note that the frame rate table is not limited to that shown in FIG. 13, and it is sufficient that the lighting time of the OLED can be adjusted based on the frame rate corresponding to the image data corrected by the image data correction unit 150. Further, it is desirable that the contents stored in the frame rate table can be changed by the host 60 or the like.

  As described above, in the first embodiment, image data is corrected based on luminance unevenness information corresponding to the operating temperature of each pixel at a plurality of pixel positions in the pixel formation region 22 of the display panel 20. Thereby, it is possible to correct luminance unevenness due to a difference in temperature characteristics of the OLEDs (pixels in a broad sense) constituting the pixels. Further, the frame rate is adjusted for each pixel on the basis of the corrected image data, so that the number of gradations lost by the correction of the image data is compensated. As a result, even when luminance unevenness due to the difference in temperature characteristics of the OLED is corrected, the occurrence of gradation collapse is prevented, the number of expressible gradations is prevented from being reduced, and the image quality can be improved. Become.

[Second Embodiment]
In the first embodiment, the example in which the pixel formation region 22 is divided into nine regions DR1 to DR9 and one detection region is provided in each region has been described. However, the present invention is not limited to this. In the second embodiment, a detection region is further provided in a region constituting the outer edge portion (outer peripheral portion) of the pixel formation region 22 in the regions DR1 to DR9. By detecting the luminance in more detection regions, the luminance unevenness can be corrected with higher accuracy.

  FIG. 14 is an explanatory diagram of a detection area in the second embodiment. FIG. 14 schematically shows a plan view of the display panel 20 and a cross-sectional structure taken along a cross-sectional line (not shown) passing through the detection regions AR4 to AR6, as in FIG. FIG. 14 shows an example of a change in luminance when one color component is displayed with the same gradation corresponding to each position of the detection areas AR4 to AR6. In FIG. 14, the same parts as those in FIG.

  In the second embodiment, detection regions BR1 to BR12 are further provided in the regions DR1 to DR4 and DR6 to DR9 that constitute the outer edge portion of the pixel formation region 22 among the regions DR1 to DR9. For example, in the region DR1, detection regions BR1 and BR12 are provided on the outer edge portion of the pixel formation region 22. In the region DR2, a detection region BR2 is provided at the outer edge of the pixel formation region 22. Other detection regions are also provided as shown in FIG. Each of the detection regions BR <b> 1 to BR <b> 12 provided at the outer edge portion desirably includes pixels that constitute the outermost peripheral dots of the pixel formation region 22. Each of the detection areas BR1 to BR12 has a configuration similar to that of the detection areas AR1 to AR9.

  As shown by temperature contour lines V1 to V3 in FIG. 14, the display panel 20 has a high operating temperature at the center of the pixel formation region 22, and the temperature at the outer edge of the pixel formation region 22 is sharper than that at the center. It tends to go down. Therefore, by detecting the physical quantity corresponding to the operating temperature in the detection areas BR1 to BR12 shown in FIG. 14, the luminance unevenness of the entire pixel formation area 22 can be accurately adjusted.

  In such a display panel according to the second embodiment, the brightness difference is determined by using the same image processing apparatus as in the first embodiment, correction information of the image data is generated, and image data using the correction information is generated. Correction can be performed.

  For example, an R component pixel to be detected in the detection area AR4 is a first pixel, and a light receiving element that detects the luminance of pixel light of the pixel is a first sensor. In addition, for example, an R component pixel to be detected in the detection area AR5 is a second pixel, and a light receiving element that detects the luminance of pixel light of the pixel is a second sensor. Further, for example, the R component pixel to be detected in the detection region BR11 located at the outer edge of the pixel formation region 22 is a third pixel, and the light receiving element that is provided at the outer edge and detects the luminance of the pixel light of the third pixel. A third sensor is assumed. In step S12 of FIG. 7, as the first detection step, the luminance of the pixel light of the first pixel is detected by the first sensor as a physical quantity corresponding to the operating temperature of the first pixel, and the luminance corresponding to the luminance is detected. Obtain the detection signal. Further, as a second detection step, the luminance of the pixel light of the second pixel is detected by the second sensor as a physical quantity corresponding to the operating temperature of the second pixel, and a detection signal corresponding to the luminance is acquired. . Furthermore, as a third detection step, the luminance of the pixel light of the third pixel is detected by the third sensor as a physical quantity corresponding to the operating temperature of the third pixel, and a detection signal corresponding to the luminance is obtained. To do. At this time, in step S22 of FIG. 7, correction information of image data is generated using the luminance of the first pixel, the luminance of the second pixel, and the luminance of the third pixel detected in each detection step.

  In the third detection step, correction information is generated using at least two luminances among the luminance of the first pixel, the luminance of the second pixel, and the luminance of the third pixel detected in each detection step. can do. By doing this, it is possible to generate correction information for the entire screen using more luminance than in the first embodiment, and thus adjust the luminance unevenness with higher accuracy than in the first embodiment. It becomes possible to do.

[Third Embodiment]
In the first embodiment or the second embodiment, the example in which the light receiving element is provided on the back side of the display panel 20 has been described. However, the present invention is not limited thereto. In the third embodiment, pixel light of a pixel to be detected may be detected by providing a light receiving element and a condensing unit in a slit between pixels.

  FIG. 15 is an explanatory diagram of a light receiving element provided in each detection region in the third embodiment. FIG. 15 shows an outline of the configuration of the light receiving elements in the detection region AR4, but the light receiving elements in other detection regions can have the same configuration. FIG. 15 schematically shows a cross-sectional structure along a cross-sectional line (not shown) passing through the detection regions AR4 to AR6, as in FIG. In FIG. 15, the same components as those in FIG.

  In the third embodiment, a slit SL provided between pixels of each color component in the detection region is provided with a phototransistor as a light receiving element and a prism PZ as a condensing unit, and the pixel light of pixels adjacent to each other is prismatic. The light is condensed by PZ and irradiated to one phototransistor. In other words, the display panel according to the third embodiment includes a condensing unit that condenses the pixel light of the first pixel and the pixel light of the adjacent pixel disposed adjacent to the first pixel. The sensor is provided to detect the luminance of the pixel light of the first pixel and the luminance of the image light of the adjacent pixel. Thereby, the brightness | luminance of the pixel light of a some pixel is detectable with one phototransistor. At this time, if it is known which color component is detected by one detection signal, it can be stored as luminance unevenness information in association with the color component. As a result, according to the third embodiment, in addition to the effects in the first embodiment or the second embodiment, it is possible to reduce elements and signal lines and improve reliability.

  Note that the configuration of the phototransistor, the processing for the detection signal, and the like are the same as those in the first embodiment or the second embodiment, and thus detailed description thereof is omitted.

〔Electronics〕
The display system including the display panel according to the first embodiment, the second embodiment, or the third embodiment can be applied to the following electronic devices, for example.

  FIGS. 16A and 16B are perspective views illustrating configurations of electronic devices to which the display system including the display panel according to the first embodiment, the second embodiment, or the third embodiment is applied. Show. FIG. 16A illustrates a perspective view of a configuration of a mobile personal computer. FIG. 16B illustrates a perspective view of a structure of a mobile phone.

  A personal computer 800 illustrated in FIG. 16A includes a main body portion 810 and a display portion 820. As the display unit 820, a display system including the display panel according to the first embodiment, the second embodiment, or the third embodiment is mounted. The main body 810 includes a host 60 in the display system, and the main body 810 is provided with a keyboard 830. That is, the personal computer 800 includes at least the image processing apparatus 100 in the above-described embodiment. The operation information via the keyboard 830 is analyzed by the host 60, and an image is displayed on the display unit 820 according to the operation information. Since the display unit 820 uses an OLED as a display element, it is possible to provide a personal computer 800 that can reduce luminance unevenness and display a high-quality image.

  A cellular phone 900 illustrated in FIG. 16B includes a main body portion 910 and a display portion 920. As the display unit 920, a display system including the display panel according to the first embodiment, the second embodiment, or the third embodiment is mounted. The main body 910 includes a host 60 in the display system, and the main body 910 is provided with a keyboard 930. That is, the mobile phone 900 is configured to include at least the image processing apparatus 100 in the above embodiment. The operation information via the keyboard 930 is analyzed by the host 60, and an image is displayed on the display unit 920 in accordance with the operation information. Since the display unit 920 uses an OLED as a display element, it is possible to provide a mobile phone 900 that can reduce luminance unevenness and display a high-quality image.

  Note that electronic devices to which the display system including the display panel in the first embodiment, the second embodiment, or the third embodiment is applied are limited to those shown in FIGS. 16A and 16B. Is not to be done. For example, personal digital assistants (PDAs), digital still cameras, televisions, video cameras, car navigation devices, pagers, electronic notebooks, electronic paper, calculators, word processors, workstations, video phones, POS (Point of sale systems ) Devices such as terminals, printers, scanners, copiers, video players and touch panels.

  As described above, the method for adjusting the luminance unevenness of the display device, the display device, the electronic apparatus, and the like according to the present invention has been described based on any one of the above embodiments, but the present invention is limited to any one of the above embodiments. is not. For example, the present invention can be implemented in various modes without departing from the gist thereof, and the following modifications are possible.

  (1) In the above embodiment, the example in which the detection areas AR1 to AR9 are provided in the pixel formation area 22 has been described, but the present invention is not limited to the number of detection areas.

  (2) In the above embodiment, an example has been described in which a light receiving element is provided on the display panel 20 as a sensor, and the light emission luminance of the OLED is detected as a physical quantity corresponding to the operating temperature of the OLED. By adopting the light receiving element as the sensor, the configuration of the display panel 20 can be simplified and the cost can be reduced. However, the sensor provided in the display panel according to the present invention is not limited to the light receiving element, and is not limited to the type of sensor. For example, a temperature sensor may be provided as a sensor, and the operating temperature of the OLED may be directly detected, and correction information may be generated based on the detected operating temperature.

  (3) In the above embodiment, the display system including the display panel to which the OLED is applied has been described as an example, but the present invention is not limited to this. For example, the display panel may be another display panel such as a liquid crystal display panel or a plasma display panel.

  (4) In the above embodiment, the example in which the image data is in the RGB format has been described, but the present invention is not limited to this.

  (5) In the above embodiments, the present invention has been described as a method for adjusting luminance unevenness of a display device, a display device, an electronic device, and the like, but the present invention is not limited to this. For example, it may be a program in which the processing procedure of the luminance unevenness adjusting method of the display device described above is described, or a recording medium on which the program is recorded.

DESCRIPTION OF SYMBOLS 10 ... Display system, 20 ... Display panel, 22 ... Pixel formation area,
30 ... Row driver, 40 ... Column driver, 50 ... Power supply circuit,
60 ... Host, 100 ... Image processing device, 110 ... A / D converter,
120 ... luminance unevenness information storage unit, 130 ... luminance difference determination unit, 140 ... correction information generation unit,
150: Image data correction unit 160: FRC unit 162: Frame rate generation unit
164 ... Frame rate table storage unit, 166 ... FRC processing unit,
168 ... FRC counter, 170 ... Display timing control unit,
800 ... Personal computer, 810, 910 ... Main unit,
820, 920 ... display unit, 830, 930 ... keyboard, 900 ... mobile phone,
AR1 to AR9, BR1 to BR12 ... detection area, DR1 to DR9 ... area

Claims (14)

A method for adjusting luminance unevenness of a display device having a pixel formation region in which each of a first pixel, a second pixel, a first sensor, and a second sensor is formed,
A first detection step of detecting a physical quantity corresponding to an operating temperature of the first pixel by the first sensor;
A second detection step of detecting a physical quantity corresponding to an operating temperature of the second pixel by the second sensor;
An image data correction step for correcting the image data of each pixel based on the physical quantity detected in the first detection step and the physical quantity detected in the second detection step;
And a display control step of compensating for the number of gradations lost by the correction of the image data in the image data correction step by adjusting a lighting time of each pixel. In claim 1,
A correction information generation step for generating correction information of image data based on the physical quantity detected in the first detection step and the physical quantity detected in the second detection step;
The image data correction step includes
A luminance unevenness adjustment method for a display device, wherein the image data is corrected using the correction information generated in the correction information generation step. In claim 1 or 2,
The first detection step includes
Detecting the luminance of the pixel light of the first pixel as a physical quantity corresponding to the operating temperature of the first pixel;
The second detection step includes
A luminance unevenness adjustment method for a display device, comprising: detecting luminance of pixel light of the second pixel as a physical quantity corresponding to an operating temperature of the second pixel. In any one of Claims 1 thru | or 3,
The display control step includes:
The image data corresponding to the first gradation value is output in the first frame corresponding to the image data corrected in the image data correction step, and the second corresponding to the image data corrected in the image data correction step. A method for adjusting luminance unevenness of a display device, characterized in that image data corresponding to a second gradation value is output in a frame. In any one of Claims 1 thru | or 4,
The method for adjusting luminance unevenness of a display device, wherein the second pixel is a pixel having the same color component as a color component of the first pixel among a plurality of color components constituting one pixel. In any one of Claims 1 thru | or 5,
A third detection step of detecting a physical quantity corresponding to the operating temperature of the third pixel provided at the outer edge by a third sensor provided at the outer edge of the pixel formation region;
The image data correction step includes
The image data is corrected using at least two of the physical quantity detected in the first detection step, the physical quantity detected in the second detection step, and the physical quantity detected in the third detection step. A method for adjusting luminance unevenness of a display device. A display device that displays an image based on image data,
A first pixel formed in the pixel formation region;
A first sensor that is formed in the pixel formation region and detects a physical quantity corresponding to an operating temperature of the first pixel;
A second pixel formed in the pixel formation region;
A second sensor that is formed in the pixel formation region and detects a physical quantity corresponding to an operating temperature of the second pixel;
An image data correction unit that corrects image data of each pixel based on the physical quantity detected by the first sensor and the physical quantity detected by the second sensor;
And a display control unit that compensates for the number of gradations lost by the correction by the image data correction unit by adjusting a lighting time of each pixel. In claim 7,
The first sensor is
Detecting the luminance of the pixel light of the first pixel as a physical quantity corresponding to the operating temperature of the first pixel;
The second sensor is
A display device, comprising: detecting a luminance of pixel light of the second pixel as a physical quantity corresponding to an operating temperature of the second pixel. In claim 7 or 8,
The display control unit
A display device, wherein the lighting time of the pixel is adjusted according to the image data corrected by the image data correction unit. In claim 9,
The display control unit
A frame rate table storage unit for storing a frame rate table in which a frame to be lit is set according to a frame rate corresponding to the image data after correction by the image data correction unit;
The display control unit
A display device that performs lighting control of the pixel based on the frame rate table. In any of claims 7 to 10,
A display device, wherein the first sensor and the second sensor are provided on a back side of a display panel on which the first pixel and the second pixel are formed. In any of claims 7 to 10,
A condensing unit that condenses pixel light of the first pixel and pixel light of an adjacent pixel arranged adjacent to the first pixel;
The first sensor is
A display device, wherein the display device is provided to detect a luminance of pixel light of the first pixel and a luminance of image light of the adjacent pixel. In any of claims 7 to 12,
A third pixel provided at an outer edge of the pixel formation region;
A third sensor that is provided at the outer edge and detects a physical quantity corresponding to an operating temperature of the third pixel;
The image data correction unit
Correcting the image data using at least two of a physical quantity detected by the first sensor, a physical quantity detected by the second sensor, and a physical quantity detected by the third sensor. Characteristic display device.   An electronic apparatus comprising the display device according to claim 7.

Images