JP2021071613A - Display device and electronic apparatus - Google Patents

Abstract

To provide a display device that can reduce blue light while suppressing cost.SOLUTION: A display device includes a display panel 11 including a red pixel, a green pixel, and a blue pixel, a storage unit 17 that stores a gamma table 42 for correcting blue luminance, and a control circuit 16 that receives gradation data of the blue pixel from outside, performs gamma correction of the gradation data using the gamma table 42, and causes the display panel 11 to display an image using the gradation data after the gamma correction. The gamma table 42 includes first and second tables 43 each showing the relation between a plurality of gradations about the blue pixel and a plurality of driving voltages. The first table 43 stores information about the driving voltage based on a first gamma characteristic. The second table 43 stores information about the driving voltage based on a second gamma characteristic in which the blue luminance is smaller than that in the first gamma characteristic. The control circuit 16 selects one of the first and second tables 43 and by using the selected table, determines the driving voltage of the blue pixel.SELECTED DRAWING: Figure 2

Description

The present invention relates to display devices and electronic devices.

In a display device using an LED light source as a backlight, a blue light (blue light) is included in the display image. Blue light is light whose wavelength is close to that of the ultraviolet region, has high energy, and has the property of traveling straight. Therefore, blue light reaches the retina without being absorbed by the cornea and crystalline lens of the eye and stimulates the retina. Therefore, it is said that blue light may cause deterioration of eye function and diseases such as eyestrain and dry eye.

The function of reducing blue light is installed in smartphones, flat-screen TVs, computer displays, and the like. Smartphones can convert display data with their own image engine and display warm-colored images with reduced blue light. Flat-panel televisions and computer displays cut blue light by reducing the brightness of the backlight.

On the other hand, small electronic devices such as electronic stationery are not equipped with a function to reduce blue light because they are inexpensive.

Japanese Unexamined Patent Publication No. 2014-160170 International Publication No. 2018/105139 JP-A-2017-3884

The present invention provides a display device and an electronic device capable of reducing blue light while suppressing costs.

The display device according to one aspect of the present invention includes a display panel including red pixels, green pixels, and blue pixels.
A storage unit that stores a first gamma table for correcting blue brightness and gradation data of the blue pixel are received from the outside, and the first gamma table is used to perform gamma correction of the gradation data. A control circuit for displaying an image on the display panel using gamma-corrected gradation data is provided. The first gamma table includes first and second tables, each of which shows a correspondence relationship between a plurality of gradations relating to a blue pixel and a plurality of drive voltages. The first table stores information on the drive voltage based on the first gamma characteristic. The second table stores information on the drive voltage based on the second gamma characteristic, which has a smaller blue brightness than the first gamma characteristic. The control circuit selects one of the first and second tables, and uses the selected table to determine the drive voltage of the blue pixel.

The electronic device according to one aspect of the present invention includes a display device according to the above aspect and a main body of the device for transmitting gradation data to the display device.

According to the present invention, it is possible to provide a display device and an electronic device capable of reducing blue light while suppressing the cost.

FIG. 1 is a block diagram of an electronic device according to an embodiment. FIG. 2 is a block diagram of the display device shown in FIG. FIG. 3 is a cross-sectional view of the display panel shown in FIG. FIG. 4 is a schematic diagram of the gamma table shown in FIG. FIG. 5 is a schematic diagram of a blue brightness gamma LUT. FIG. 6 is a graph in which the B-luminance gamma LUT of FIG. 5 is converted into a graph. FIG. 7 is a flowchart illustrating the operation of the display device. FIG. 8 is a graph illustrating an example of the emission spectrum of the display panel. FIG. 9 is a diagram for explaining the relationship between the blue luminance reduction rate and the blue light cut rate. FIG. 10 is an external view of the electronic device. FIG. 11 is a flowchart illustrating the operation of selecting the blue light cut rate in the main body of the device. FIG. 12 is an external view of the electronic device according to the modified example. FIG. 13 is a flowchart illustrating the operation of selecting the blue light cut rate in the main body of the device according to the modified example.

Hereinafter, embodiments will be described with reference to the drawings. However, the drawings are schematic or conceptual, and the dimensions and ratios of each drawing are not necessarily the same as the actual ones. Further, even when the same part is represented between the drawings, the relationship and ratio of the dimensions of each other may be represented differently. In particular, some embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention, and depending on the shape, structure, arrangement, etc. of the components, the technical idea of the present invention. Is not specified. In the following description, elements having the same function and configuration are designated by the same reference numerals, and duplicate explanations will be given only when necessary.

[1] Configuration of Electronic Device In the present embodiment, an electronic dictionary will be described as an example of the electronic device.

FIG. 1 is a block diagram of the electronic device 1 according to the embodiment. The electronic device 1 includes a device main body 2 and a display device 10. The device main body 2 includes a CPU (Central Processing Unit) 3 as a processor, a ROM (Read Only Memory) 4, a RAM (Random Access Memory) 5, an HDD (Hard Disk Drive) 6, a communication unit 7, and an operation unit 8. .. The CPU 3, ROM 4, RAM 5, HDD 6, communication unit 7, operation unit 8, and display device 10 are connected via the bus 9.

The ROM 4 stores programs and data that need to retain the stored contents even when the power is turned off.

The RAM 5 temporarily stores programs and data. Further, the RAM 5 is used as a work area of the CPU 3 and stores a table or the like temporarily created by the CPU 3.

HDD 6 is an example of a non-volatile memory. The HDD 6 non-volatilely stores data for realizing various functions of the electronic device 1. In this embodiment, the HDD 6 stores dictionary data.

The CPU 3 executes various processes according to the program stored in the ROM 4 or the program loaded into the RAM 5 from the HDD 6 or the like.

The communication unit 7 performs wireless communication and / or wired communication with an external device. The communication unit 7 can receive the dictionary data via the network.

The operation unit 8 accepts a user's input operation. The operation unit 8 presses various keys such as a power key for turning on / off the power, a character input key for inputting an alphabet, a decision key for instructing a character string input decision, and an end key for instructing the end of learning. Be prepared.

The display device 10 executes an image display operation by using the control signal and data from the device main body 2. Details of the display device 10 will be described later.

[2] Configuration of Display Device 10 Next, the configuration of the display device 10 will be described. In the present embodiment, a liquid crystal display device will be described as an example of the display device.

FIG. 2 is a block diagram of the display device 10 shown in FIG. The display device 10 includes a display panel 11, a backlight (illumination device) 12, a scanning line drive circuit 13, a signal line drive circuit 14, a voltage generation circuit 15, a control circuit 16, and a storage unit 17.

The display panel 11 includes a pixel array in which a plurality of pixel PXs are arranged in a matrix. The display panel 11 is provided with a plurality of scanning lines GL1 to GLm, each extending in the row direction, and a plurality of signal lines SL1 to SLn, each extending in the column direction. “M” and “n” are integers of 2 or more, respectively. Pixels PX are arranged in the intersection region of the scanning line GL and the signal line SL.

The backlight 12 is a surface light source that irradiates the back surface of the display panel 11 with light. As the backlight 12, for example, a direct type or side light type (edge light type) LED backlight is used.

The scanning line drive circuit 13 is electrically connected to a plurality of scanning lines GL. The scanning line drive circuit 13 sends a scanning signal for turning on / off the switching element included in the pixel PX to the display panel 11 based on the control signal sent from the control circuit 16.

The signal line drive circuit 14 is electrically connected to a plurality of signal line SLs. The signal line drive circuit 14 receives a control signal and display data from the control circuit 16. The signal line drive circuit 14 sends a gradation signal (drive voltage) corresponding to the display data to the display panel 11 based on the control signal.

The voltage generation circuit 15 generates various voltages necessary for the operation of the display device 10 and supplies them to each circuit.

The control circuit 16 comprehensively controls the operation of the display device 10. The control circuit 16 receives the image data DT and the control signal CNT from the outside (equipment main body 2). The control circuit 16 generates various control signals based on the image data DT, and sends these control signals to each circuit.

The storage unit 17 includes a non-volatile memory and a volatile memory. The storage unit 17 stores the gamma table 18 in a non-volatile manner. Details of the gamma table 18 will be described later. Further, the storage unit 17 includes a storage area 19 for storing various set values in a non-volatile manner.

[3] Configuration of Display Panel 11 Next, the configuration of the display panel 11 will be described. FIG. 3 is a cross-sectional view of the display panel 11 shown in FIG.

The display panel 11 includes a TFT substrate 20 on which a switching element, pixel electrodes, and the like are formed, and a color filter substrate (CF substrate) 21 on which a color filter, common electrodes, and the like are formed and arranged to face the TFT substrate 20. Each of the TFT substrate 20 and the CF substrate 21 is composed of a transparent substrate (for example, a glass substrate or a plastic substrate). The TFT substrate 20 is arranged to face the backlight 12, and the illumination light from the backlight 12 enters the display panel 11 from the TFT substrate 20 side. Of the two main surfaces of the display panel 11, the main surface opposite to the backlight 12 is the display surface of the display panel 11.

The liquid crystal layer 22 is filled between the TFT substrate 20 and the CF substrate 21. Specifically, the liquid crystal layer 22 is enclosed in a region surrounded by the TFT substrate 20 and the CF substrate 21 and a sealing material (not shown) to which they are attached. The sealing material is made of, for example, an ultraviolet curable resin, a thermosetting resin, an ultraviolet / heat combined type curable resin, etc., is applied to the TFT substrate 20 or the CF substrate 21 in the manufacturing process, and then cured by ultraviolet irradiation, heating, or the like. Be made to.

The liquid crystal material constituting the liquid crystal layer 22 changes its optical characteristics by manipulating the orientation of the liquid crystal molecules according to the electric field applied between the TFT substrate 20 and the CF substrate 21. As the liquid crystal mode, various liquid crystal modes such as a VA (Vertical Alignment) mode, a TN (Twisted Nematic) mode, and a homogeneous mode can be applied.

A plurality of switching elements (active elements) 23 are provided on the liquid crystal layer 22 side of the TFT substrate 20. As the switching element 23, for example, a TFT (Thin Film Transistor) is used, and an n-channel TFT is used. The TFT 23 is partially in contact with the gate electrode that functions as the scanning line GL, the gate insulating film provided on the gate electrode, the semiconductor layer (for example, an amorphous silicon layer) provided on the gate insulating film, and the semiconductor layer. Moreover, it is provided with a source electrode and a drain electrode provided apart from each other. The source electrode is electrically connected to the signal line SL.

An insulating layer 24 is provided on the TFT 23. A plurality of pixel electrodes 25 corresponding to a plurality of pixels are provided on the insulating layer 24. A contact plug (contact hole) 26 electrically connected to the pixel electrode 25 is provided in the insulating layer 24 and on the drain electrode of the TFT 23.

A color filter 27 is provided on the liquid crystal layer 22 side of the CF substrate 21. The color filter 27 includes a plurality of coloring filters (coloring members), specifically, a plurality of red filters 27-R, a plurality of green filters 27-G, and a plurality of blue filters 27-B. A general color filter is composed of the three primary colors of light, red (R), green (G), and blue (B). A set of three adjacent colors R, G, and B is a display unit (pixel), and the single color part of any one of R, G, and B in one pixel is the minimum called a sub pixel (sub pixel). It is a drive unit. The TFT 23 and the pixel electrode 25 are provided for each subpixel.

A black matrix (light-shielding film) 28 for shading is provided at the boundary portion of the red filter 27-R, the green filter 27-G, and the blue filter 27-B, and the boundary portion of the pixels (subpixels). That is, the black matrix 28 is formed in a mesh shape. The black matrix 28 is provided, for example, to block unnecessary light between the coloring members and improve the contrast.

A common electrode 29 is provided on the color filter 27 and the black matrix 28. The common electrode 29 is formed in a flat shape over the entire display area of the display panel 11.

A polarizing plate 30 is laminated on the side of the TFT substrate 20 opposite to the liquid crystal layer 22, and a polarizing plate 31 is laminated on the side of the CF substrate 21 opposite to the liquid crystal layer 22. The polarizing plate 30 and the polarizing plate 31 are arranged so that their transmission axes are orthogonal to each other, that is, in an orthogonal Nicol state. A 1/4 wave plate may be provided between the TFT substrate 20 and the polarizing plate 30. A 1/4 wave plate may be provided between the CF substrate 21 and the polarizing plate 31.

The pixel electrode 25, the contact plug 26, and the common electrode 29 are composed of transparent electrodes, and for example, ITO (indium tin oxide) is used. As the insulating layer 24, a transparent insulating material is used, and for example, silicon nitride (SiN) is used.

[4] Configuration of Gamma Table 18 From the device main body 2, the display panel 11 displays gradation data for red (R) pixels, gradation data for green (G) pixels, and gradation for blue (B) pixels. Receive data. The image data DT sent from the device main body 2 to the display panel 11 includes gradation data for each pixel.

The display panel 11 has a unique gamma characteristic. The control circuit 16 performs gamma correction of gradation data according to the gamma characteristic of the display panel 11. The gamma correction is a function of adjusting the brightness of the input gradation data so that the image displayed on the display panel 11 is close to a desired color. A gamma value is set to perform gamma correction. The input x, the output y, and the gamma value γ have a relationship of ^{“y = x γ”.} Here, the input x is the gradation data sent from the main body of the device, and the output y is the gradation data after gamma correction. The drive voltage of the pixel is determined according to the gradation data. The control circuit 16 performs gamma correction using the gamma table 18 stored in the storage unit 17.

FIG. 4 is a schematic view of the gamma table 18 shown in FIG. The gamma table 18 includes a red (R) luminance gamma LUT (look-up table) 40, a green (G) luminance gamma LUT 41, and a blue (B) luminance gamma LUT 42. The R-luminance gamma LUT 40 is used for gamma-correcting the gradation data of red pixels. The G-luminance gamma LUT 41 is used for gamma-correcting the gradation data of green pixels. The B-luminance gamma LUT 42 is used for gamma-correcting the gradation data of blue pixels.

The B-luminance gamma LUT 42 includes a plurality of look-up tables in order to reduce blue light. For example, the B-brightness gamma LUT 42 is a normal look-up table (LUT (no reduction)) 43-0 that does not reduce blue brightness, and a look-up table (LUT (10% blue reduction)) 43 that reduces blue brightness by 10%. -1, Look-up tables (LUT (20% blue reduction) to LT (70% blue reduction)) 43-2 to 43-7 that reduce blue brightness by 20% to 70%, respectively, are provided.

FIG. 5 is a schematic view of the B-luminance gamma LUT 42. For example, it is assumed that the gradation is 256 (0 gradation to 255 gradation). For example, 0 gradation is black, 255 gradation is white (specifically, pixel color), that is, it is an example of a normally black type display panel 11.

In FIG. 5, the correspondence between the gradation and the drive voltage ratio of “no reduction” to “70% blue reduction” corresponds to the lookup tables 43-0 to 43-7 in FIG. 4, respectively. The B-luminance gamma LUT 42 shows the correspondence between the gradation and the drive voltage ratio (%). In FIG. 5, specific numerical values are omitted. The drive voltage ratio (%) is the ratio of the drive voltage of a certain gradation when the drive voltage of the maximum gradation (255 gradation in this embodiment) is set to 100%. Therefore, a certain drive voltage is obtained by multiplying the drive voltage of the maximum gradation by the drive voltage ratio stored in the table.

FIG. 6 is a graph in which the B-luminance gamma LUT 42 of FIG. 5 is converted into a graph. FIG. 6 shows a graph of the look-up tables 43-0 to 43-7 included in the B-luminance gamma LUT 42. The horizontal axis of FIG. 6 represents the gradation, and the vertical axis of FIG. 6 represents the drive voltage ratio (%). Each graph of FIG. 6 has a unique gamma characteristic (gamma curve).

As shown in FIG. 6, the drive voltage (drive voltage ratio) decreases in the order of the look-up tables 43-0 to 43-7. That is, the blue brightness is reduced in the order of the lookup tables 43-0 to 43-7, and the blue light of the image is reduced.

The R-luminance gamma LUT40 and the G-luminance gamma LUT41 are the same as the normal look-up table 43-0 that does not reduce the blue brightness. That is, the gamma curves of the R-luminance gamma LUT40 and the G-luminance gamma LUT41 are the same as the gamma curve without reduction in FIG. The R-luminance gamma LUT40 and the G-luminance gamma LUT41 are each composed of numerical values corresponding to one type of gamma curve, and a plurality of look-up tables such as the B-luminance gamma LUT42 are not prepared.

[5] Operation of Display Device 10 The operation of the display device 10 configured as described above will be described. FIG. 7 is a flowchart illustrating the operation of the display device 10.

The control circuit 16 selects a look-up table to be used (step S100). Specifically, the control circuit 16 selects the look-up table to be used from the blue-luminance look-up tables 43-0 to 43-7 included in the B-luminance gamma LUT 42. For example, the storage area 19 of the storage unit 17 stores information on the currently selected look-up table among the blue-luminance look-up tables 43-0 to 43-7 as a set value. The control circuit 16 selects a look-up table for blue brightness to be used based on the set value of the storage area 19. Further, the control circuit 16 selects the R-luminance gamma LUT40 and the G-luminance gamma LUT41.

Subsequently, the control circuit 16 reads out the lookup table selected in step S100 from the storage unit 17 (step S101).

Subsequently, the control circuit 16 receives the image data DT from the device main body 2 (step S102). The image data DT includes gradation data for each pixel.

Subsequently, the control circuit 16 determines the drive voltage of each pixel using the look-up table (step S103). At this time, the control circuit 16 determines the drive voltage of the blue pixel by using the look-up table selected in advance from the look-up tables 43-0 to 43-7 for blue luminance.

Subsequently, the control circuit 16 displays an image on the display panel 11 (step S104). Specifically, the control circuit 16 sends a control signal to the scanning line driving circuit 13 and the signal line driving circuit 14. The scanning line drive circuit 13 scans a plurality of scanning lines GL. The signal line drive circuit 14 applies a drive voltage to a plurality of signal line SLs.

FIG. 8 is a graph illustrating an example of the emission spectrum of the display panel 11. FIG. 8 shows graphs corresponding to “no reduction” to “70% blue reduction”. The horizontal axis of FIG. 8 is the wavelength (nm), and the vertical axis of FIG. 8 is the light intensity (arbitrary unit).

Blue light is light having a wavelength peak of around 453 nm and a wavelength range of approximately 380 nm to 500 nm. As the blue brightness is reduced, the intensity of the blue light is reduced.

FIG. 9 is a diagram for explaining the relationship between the blue luminance reduction rate and the blue light cut rate. For example, as the blue brightness reduction rate is reduced to 10% to 70%, the blue light cut rate is reduced to 0% to 50%. The blue light cut rate corresponds to the reduction rate of the peak of the curve of FIG.

[6] Blue Light Cut Rate Selection Operation FIG. 10 is an external view of the electronic device 1. FIG. 11 is a flowchart illustrating the operation of selecting the blue light cut rate in the device main body 2.

The CPU 3 monitors whether or not the item of the blue light cut rate is selected by operating the operation unit 8 by the user (step S200). When the user selects the item of the blue light cut rate, the CPU 3 causes the display device 10 to display the image of the blue light cut rate (step S201). In FIG. 10, an image of the blue light cut rate is displayed on the display device 10. This image of the blue light cut rate includes the numerical values of the blue light cut rate (0%, 10%, 20%, 30%, 40%, 50%).

Subsequently, the CPU 3 monitors whether or not the numerical value of the blue light cut rate is selected by operating the operation unit 8 by the user (step S202). When the user selects the numerical value of the blue light cut rate, the CPU 3 transmits the information of the blue light cut rate to the display device 10 (step S203).

The control circuit 16 receives information on the blue light cut rate from the device main body 2. The control circuit 16 stores information on the blue light cut rate in the storage area 19. After that, the control circuit 16 selects the corresponding look-up table using the set value stored in the storage area 19. Then, the control circuit 16 executes the display operation using the selected look-up table.

(Modification example)
Further, the electronic device 1 may include a dedicated key for selecting the blue light cut rate. FIG. 12 is an external view of the electronic device 1 according to the modified example. FIG. 13 is a flowchart illustrating the operation of selecting the blue light cut rate in the device main body 2 according to the modified example.

The operation unit 8 includes the selection key 8A. The selection key 8A includes a key for lowering the blue light cut rate and a key for increasing the blue light cut rate.

The CPU 3 monitors whether or not the selection key 8A is pressed by the user (step S300). When the user presses the selection key 8A, the CPU 3 causes the display device 10 to display an image of the blue light cut rate (step S301). The image in step S301 includes the current value of the blue light cut rate. In FIG. 12, the display device 10 displays the current numerical value of the blue light cut rate. For example, the blue light cut rate can be selected from any of 0%, 10%, 20%, 30%, 40%, and 50%.

Subsequently, the CPU 3 monitors whether or not the selection key 8A is pressed by the user (step S302). When the user presses the selection key 8A, the CPU 3 causes the display device 10 to display the changed numerical value (step S303). Subsequently, the CPU 3 transmits information on the blue light cut rate to the display device 10 (step S304). The control circuit 16 executes the display operation by using the information of the blue light cut rate transmitted from the device main body 2.

After that, every time the selection key 8A is pressed by the user, steps S302 to S304 are repeated to continuously change the numerical value.

When the user does not operate the selection key 8A for a predetermined time (step S305 = Yes), the CPU 3 returns the display device 10 to the original image (step S306).

[7] Effect of the Embodiment According to the present embodiment, the display device 10 built in the electronic device 1 can change the blue light cut rate. Further, the drive voltage for the blue pixel can be determined by referring to one of the plurality of look-up tables 43 for blue brightness. That is, gamma correction can be performed by a simple operation of referring to the look-up table.

Further, in the present embodiment, a special image engine or the like for performing gamma correction is not required. Thereby, it is possible to reduce the blue light while suppressing the cost of the electronic device 1.

[8] Other Examples In the above embodiment, the storage unit 17 of the display device 10 non-volatilely stores the look-up table for gamma correction. However, the configuration is not limited to this. For example, the device main body 2 may non-volatilely store the look-up table for gamma correction, and the device main body 2 may transmit the look-up table to the display device 10. In this case, the storage unit 17 of the display device 10 temporarily stores the lookup table transmitted from the device main body 2. Then, the control circuit 16 performs gamma correction using the look-up table volatilely stored in the storage unit 17.

The present invention can also be applied to display devices other than liquid crystal display devices. For example, the display device according to the present embodiment may be an organic EL (electroluminescence) display device or the like.

The present invention is also applicable to electronic stationery other than electronic dictionaries.

The present invention is not limited to the above-described embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, and in that case, the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent requirements are deleted can be extracted as an invention.

1 ... Electronic device, 2 ... Device body, 3 ... CPU, 4 ... ROM, 5 ... RAM, 7 ... Communication unit, 8 ... Operation unit, 8A ... Selection key, 9 ... Bus, 10 ... Display device, 11 ... Display panel , 12 ... Backlight, 13 ... Scan line drive circuit, 14 ... Signal line drive circuit, 15 ... Voltage generation circuit, 16 ... Control circuit, 17 ... Storage unit, 18 ... Gamma table, 19 ... Storage area, 20 ... TFT board , 21 ... CF substrate, 22 ... liquid crystal layer, 23 ... switching element, 24 ... insulating layer, 25 ... pixel electrode, 26 ... contact plug, 27 ... color filter, 28 ... black matrix, 29 ... common electrode, 30, 31 ... Plate plate, 40 ... Gamma LUT for red brightness, 41 ... Gamma LUT for green brightness, 42 ... Gamma LUT for blue brightness, 43-0 to 43-7 ... Look-up table.

Claims (5)

A display panel containing red pixels, green pixels, and blue pixels,
A storage unit that stores the first gamma table for correcting blue brightness,
The gradation data of the blue pixel is received from the outside, the first gamma table is used to perform gamma correction of the gradation data, and the gamma-corrected gradation data is used to display an image on the display panel. Control circuit and
Equipped with
The first gamma table includes first and second tables, each of which shows a correspondence relationship between a plurality of gradations relating to a blue pixel and a plurality of drive voltages.
The first table stores information on the drive voltage based on the first gamma characteristic.
The second table stores information on the drive voltage based on the second gamma characteristic, which has a smaller blue brightness than the first gamma characteristic.
The control circuit is a display device that selects one of the first and second tables and uses the selected table to determine the drive voltage of the blue pixel. The storage unit includes a storage area for storing information on a table to be used.
The display device according to claim 1, wherein the control circuit performs a table selection operation based on the information. The storage unit stores a second gamma table for correcting red brightness and a third gamma table for correcting green brightness.
The display device according to claim 1 or 2, wherein the control circuit uses the second and third gamma tables to perform the image display operation. The display device according to any one of claims 1 to 3 and
The main body of the device that transmits gradation data to the display device,
Electronic device equipped with. The electronic device according to claim 4, wherein the device main body receives information for selecting one of the first and second tables according to a user operation, and transmits the information to the display device.

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