Display driving device

Abstract

The invention provides a display driving device. The gamma voltage compensation circuit is controlled by the gamma circuit to provide at least one compensation voltage for each digital-to-analog converter in the source driving circuit so as to compensate the gamma voltage corresponding to the target compensation gray scale.

Description

Technical Field

[0001] The present invention relates to a driving device, and in particular to a display driving device. Background Art

[0002] In the technical field of display driver devices, since the human eye's perception of brightness is not linear, a gamma driver circuit is required to provide a gamma voltage to a source driver circuit so that the source driver circuit adjusts the driving voltage provided to the display pixel. However, as the resolution and refresh rate of display devices become higher and higher, the requirements for the speed at which the gamma voltage reaches the target voltage are becoming more stringent. Summary of the invention

[0003] The invention provides a display driving device, which can effectively improve the speed at which a gamma voltage reaches a target voltage and ensure the display quality of the display device.

[0004] The display driving device of the present invention includes a first source driving circuit, a second source driving circuit, a gamma circuit, a first gamma voltage compensation circuit and a second gamma voltage compensation circuit. The first source driving circuit includes a plurality of first digital-to-analog converters. The second source driving circuit includes a plurality of second digital-to-analog converters. The gamma circuit is coupled to the plurality of first digital-to-analog converters and the plurality of second digital-to-analog converters, and the gamma circuit is arranged between the first source driving circuit and the second source driving circuit, and provides a plurality of gamma voltages to each first digital-to-analog converter and each second digital-to-analog converter. The first gamma voltage compensation circuit is coupled to the gamma circuit and the first source driving circuit, and provides at least one first digital-to-analog converter compensation voltage to compensate for the gamma voltage. The second gamma voltage compensation circuit is coupled to the gamma circuit and the second source driving circuit, and provides at least one second digital-to-analog converter compensation voltage to compensate for the gamma voltage.

[0005] In one embodiment of the present invention, the gamma circuit includes a third digital-to-analog converter and a plurality of first operational amplifiers. The plurality of first operational amplifiers are coupled to the third digital-to-analog converter, the plurality of first digital-to-analog converters and the plurality of second digital-to-analog converters, and provide gamma voltages according to the third digital-to-analog converter.

[0006] In an embodiment of the present invention, the first gamma voltage compensation circuit and the second gamma voltage compensation circuit respectively include at least one second operational amplifier, the second operational amplifier is coupled to the third digital-to-analog converter, and provides at least one compensation voltage according to the third digital-to-analog converter.

[0007] In one embodiment of the present invention, the gamma circuit further includes a fourth digital-to-analog converter coupled to the first gamma voltage compensation circuit and the second gamma voltage compensation circuit. The input end of the second operational amplifier is coupled to the fourth digital-to-analog converter, and is controlled by the fourth digital-to-analog converter to compensate the gamma voltage. The selection circuit is coupled to the output end of the second operational amplifier, the plurality of first digital-to-analog converters, and the plurality of second digital-to-analog converters, and selects the gamma voltage compensated by the compensation voltage.

[0008] In one embodiment of the present invention, each first digital-to-analog converter and each second digital-to-analog converter are connected to the gamma circuit through m first signal transmission lines, respectively, and the selection circuits of the first gamma voltage compensation circuit and the second gamma voltage compensation circuit are coupled to the first signal transmission lines corresponding to the target compensation grayscale of each first digital-to-analog converter and each second digital-to-analog converter through n second signal transmission lines, respectively, wherein m and n are positive integers, and n=m.

[0009] In one embodiment of the present invention, each first digital-to-analog converter and each second digital-to-analog converter are respectively connected to the gamma circuit through m first signal transmission lines, and the first gamma voltage compensation circuit and the second gamma voltage compensation circuit are respectively coupled to the first signal transmission lines corresponding to the target compensation grayscale of each first digital-to-analog converter and each second digital-to-analog converter through n second signal transmission lines, wherein m and n are positive integers, and n≦m.

[0010] In one embodiment of the present invention, m<256, and the first signal transmission line outputs a plurality of gray levels by interpolation.

[0011] In one embodiment of the present invention, the second signal transmission line compensates for a plurality of gray levels by interpolation.

[0012] In an embodiment of the present invention, the number of the second operational amplifiers is less than or equal to n.

[0013] In an embodiment of the present invention, the number of the first operational amplifiers is less than or equal to m.

[0014] In an embodiment of the present invention, the first source driving circuit is disposed between the gamma circuit and the first gamma voltage compensation circuit, and the second source driving circuit is disposed between the gamma circuit and the second gamma voltage compensation circuit.

[0015] In an embodiment of the present invention, the first gamma voltage compensation circuit is disposed in the first source driving circuit, and the second gamma voltage compensation circuit is disposed in the second source driving circuit.

[0016] In one embodiment of the present invention, the above-mentioned first source driving circuit also includes multiple third operational amplifiers, and the second source driving circuit also includes multiple fourth operational amplifiers, each third operational amplifier is coupled between the corresponding first digital-to-analog converter and the corresponding source line, and each fourth operational amplifier is coupled between the corresponding second digital-to-analog converter and the corresponding source line. The above-mentioned multiple first digital-to-analog converters control the above-mentioned multiple third operational amplifiers to drive the corresponding source lines according to the gamma voltage and the compensation voltage, and the above-mentioned multiple second digital-to-analog converters control the fourth operational amplifiers to drive the corresponding source lines according to the gamma voltage and the compensation voltage.

[0017] In an embodiment of the present invention, the first Gamma voltage compensation circuit and the second Gamma voltage compensation circuit are disposed at a side away from the Gamma circuit.

[0018] Based on the above, the gamma voltage compensation circuit of the embodiment of the present invention can be controlled by the gamma circuit to provide at least one compensation voltage to each digital-to-analog converter in the source driving circuit to compensate the gamma voltage corresponding to the target compensation grayscale. In this way, the gamma voltage compensation circuit is controlled by the gamma circuit to provide the compensation voltage to compensate the gamma voltage, which can effectively increase the speed at which the gamma voltage reaches the target voltage, thereby ensuring the display quality of the display device.

[0019] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figures 1 to 3 is a schematic diagram of a display driving device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the content of the present invention more understandable, the following embodiments are specifically cited as examples on which the present invention can be implemented. In addition, wherever possible, components / members with the same reference numerals are used in the drawings and embodiments to represent the same or similar components.

[0022] Figure 1 is a schematic diagram of a display driving device according to an embodiment of the present invention, please refer to Figure 1The display driving device 100 may include a gamma circuit 102, a source driving circuit 104, a source driving circuit 106, a first gamma voltage compensation circuit 108, and a second gamma voltage compensation circuit 110, wherein the gamma circuit 102 is disposed between the source driving circuit 104 and the source driving circuit 106, and the first gamma voltage compensation circuit 108 is disposed on a side of the source driving circuit 104 away from the gamma circuit 102, so that the source driving circuit 104 is disposed between the first gamma voltage compensation circuit 108 and the gamma circuit 102. Similarly, the second gamma voltage compensation circuit 110 is disposed on a side of the source driving circuit 106 away from the gamma circuit 102, so that the source driving circuit 106 is disposed between the source driving circuit 110 and the gamma circuit 102. The gamma circuit 102 is coupled to the source driving circuit 104, the source driving circuit 106, the first gamma voltage compensation circuit 108, and the second gamma voltage compensation circuit 110.

[0023] Further, the source driving circuit 104 may include a plurality of first digital-to-analog converters D1-D1200 and operational amplifiers O1-O1200, the first digital-to-analog converters D1-D1200 are coupled to the operational amplifiers O1-O1200, and each of the first digital-to-analog converters D1-D1200 is coupled to the gamma circuit 102 via m first signal transmission lines. Similarly, the source driving circuit 106 may include a plurality of second digital-to-analog converters D1201-D2400 and operational amplifiers O1201-O2400, the second digital-to-analog converters D1201-D2400 are coupled to the operational amplifiers O1201-O2400, and each of the second digital-to-analog converters D1201-D2400 is coupled to the gamma circuit 102 via m first signal transmission lines. The number of digital-to-analog converters and operational amplifiers in the source driving circuits 104 and 106 may be set according to the resolution, and is not limited to the present embodiment. In addition, the first gamma voltage compensation circuit 108 is coupled to each first digital-to-analog converter D1-D1200 through n second signal transmission lines, that is, among the m second signal transmission lines coupled to each first digital-to-analog converter D1-D1200, n second signal transmission lines are coupled to n first signal transmission lines to receive the compensation voltage provided by the first signal transmission lines. Similarly, the second gamma voltage compensation circuit 110 is coupled to each second digital-to-analog converter D1201-D2400 through n second signal transmission lines, where m and n are positive integers, and n≦m.

[0024] The gamma circuit 102 can provide a plurality of gamma voltages to each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400. Figure 1In the embodiment, each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400 is connected to the gamma circuit 102 through m first signal transmission lines, and the gamma circuit 102 can transmit m gamma voltages to each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400 through the m first signal transmission lines. Each of the m gamma voltages is used as a source driving voltage of a different gray scale, for example, when m is equal to 256, the m gamma voltages can be used as a source driving voltage of gray scales 0-255.

[0025] The first digital-to-analog converters D1-D1200 and the second digital-to-analog converters D1201-D2400 can adjust the source driving voltage provided by the operational amplifiers O1-O1200 and O1201-O2400 according to the gamma voltage corresponding to the grayscale of the image data signal to drive the source lines S1-S2400. For example, assuming that the 1st to 256th first signal transmission lines coupled to the first digital-to-analog converter D1 are sequentially used to provide gamma voltages corresponding to grayscales 0-255, when the grayscale of the image data signal received by the first digital-to-analog converter D1 is 124, the first digital-to-analog converter D1 can adjust the source driving voltage provided by the operational amplifier coupled to the first digital-to-analog converter D1 according to the gamma voltage provided by the 125th first signal transmission line to drive the display pixel on the source line S1 to display an image with a grayscale of 124.

[0026] In addition, the gamma circuit 102 can also control the first gamma voltage compensation circuit 108 to provide at least one compensation voltage to compensate at least one gamma voltage. For example, assuming that the target compensation grayscale of the first gamma voltage compensation circuit 108 is grayscale 124, 128, 132, the first gamma voltage compensation circuit 108 can be coupled to the first signal transmission line used to compensate grayscale 124, 128, 132 among the three first signal transmission lines of each first digital-to-analog converter D1-D1200 through three (n=3) second signal transmission lines. The gamma circuit 102 can control the first gamma voltage compensation circuit 108 to provide the compensation voltage to the first signal transmission line corresponding to the target compensation grayscale through the three second signal transmission lines, that is, to provide the compensation voltage to the first signal transmission line used to compensate grayscale 124, 128, 132 respectively. The gamma circuit 102 can also control the second gamma voltage compensation circuit 110 to provide at least one compensation voltage to the source driving circuit 106 in a similar manner to compensate the gamma voltage, which will not be described in detail herein.

[0027] In this way, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 are controlled by the gamma circuit 102 to provide a compensation voltage to compensate the gamma voltage, which can effectively increase the speed at which the gamma voltage reaches the target voltage, thereby ensuring the display quality of the display device. In addition, by arranging the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 at a side away from the gamma circuit 102, the situation in which the gamma voltage charging speed of the source line far from the gamma circuit 102 is reduced due to the transmission line resistance can be improved.

[0028] It is worth noting that since the human eye is more sensitive to intermediate grayscales (e.g., grayscales 100-150), the above-mentioned target compensation grayscale may only include part of the intermediate grayscale, that is, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 may only provide compensation voltages for the intermediate grayscales, thereby avoiding a significant increase in the circuit area of ​​the display driving device due to the addition of too many first signal transmission lines to the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110.

[0029] In detail, the implementation of the gamma circuit 102, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 can be as follows: Figure 2 As shown. Figure 2 In an embodiment, the gamma circuit 102 may include a digital-to-analog converter DAC1 and a plurality of operational amplifiers P1-P256, but the present invention is not limited thereto. In other embodiments, the number of operational amplifiers in the gamma circuit 102 may be less than 256. The operational amplifiers P1-P256 are respectively coupled to the digital-to-analog converter DAC1 and the corresponding first signal transmission line, and are respectively coupled to the first digital-to-analog converter D1-D1200 and the second digital-to-analog converter D1201-D2400 through the corresponding first signal transmission line. In other words, each operational amplifier P1-P256 is coupled to each first digital-to-analog converter D1-D1200 and each second digital-to-analog converter D1201-D2400.

[0030] In addition, the first gamma voltage compensation circuit 108 may include operational amplifiers A1~A3, and the second gamma voltage compensation circuit 110 may include operational amplifiers B1~B3, wherein the input ends of the operational amplifiers A1~A3 are coupled to the input ends of the operational amplifiers corresponding to the target compensation grayscale in the gamma circuit 102 (in the present embodiment, the operational amplifiers P125, P129, and P133, but this is not limited to, and only two operational amplifiers may be used), and the output ends of the operational amplifiers A1~A3 are coupled to the first signal transmission lines corresponding to the target compensation grayscale through three second signal transmission lines, and are coupled to each first digital-to-analog converter D1~D1200 through the first signal transmission lines corresponding to the target compensation grayscale. Similarly, the input ends of the operational amplifiers B1~B3 are coupled to the input ends of the operational amplifiers corresponding to the target compensation grayscale in the gamma circuit 102, and the output ends of the operational amplifiers B1~B3 are coupled to the first signal transmission lines corresponding to the target compensation grayscale through three second signal transmission lines, and are coupled to each second digital-to-analog converter D1201~D2400 through the first signal transmission lines corresponding to the target compensation grayscale.

[0031] The digital-to-analog converter DAC1 can control the operational amplifiers P1-P256 to provide 256 gamma voltages corresponding to grayscales 0-255 to each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400. In addition, since the input terminals of the operational amplifiers A1-A3 and the operational amplifiers B1-B3 are coupled to the input terminals of the operational amplifiers P125, P129, and P133, the digital-to-analog converter DAC1 controls the operational amplifiers P125, P129, and P133 to generate gamma voltages corresponding to grayscales 124, 128, and 132, and also controls the operational amplifiers A1-A3 and the operational amplifiers B1-B3 to generate compensation voltages corresponding to target compensation grayscales (grayscales 124, 128, and 132). In this way, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 are implemented with multiple operational amplifiers, and the digital-to-analog converter DAC1 is shared with the gamma circuit 102 to control the generation of the compensation voltage. This can compensate the gamma voltage without significantly increasing the circuit area (the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 do not need to include a digital-to-analog converter), thereby effectively increasing the speed at which the gamma voltage reaches the target voltage and ensuring the display quality of the display device.

[0032] It is worth noting that in other embodiments, the number of operational amplifiers included in the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 is not limited to the present embodiment. For example, the number of operational amplifiers included in the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 may also be less than 3. The number of operational amplifiers included in the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 may be adjusted according to the number of target compensation grayscales.

[0033] Figure 3 is a schematic diagram of a display driving device according to another embodiment of the present invention. Figure 2 The difference is that the gamma circuit 102 may also include a digital-to-analog converter DAC2, the first gamma voltage compensation circuit 108 may include a plurality of operational amplifiers A1-AX and a selection circuit SL1, and the second gamma voltage compensation circuit 110 may include a plurality of operational amplifiers B1-BX and a selection circuit SL2, wherein X is a positive integer. The selection circuits SL1 and SL2 may be implemented, for example, by a digital-to-analog converter, but are not limited thereto. The digital-to-analog converter DAC2 is coupled to the input ends of the operational amplifiers A1-AX and the operational amplifiers B1-BX, the selection circuit SL1 is coupled to the output ends of the operational amplifiers A1-AX, and is coupled to each of the first digital-to-analog converters D1-D1200 through Y first signal transmission lines, that is, among the 256 second signal transmission lines coupled to each of the first digital-to-analog converters D1-D1200, Y second signal transmission lines are coupled to Y first signal transmission lines to receive the compensation voltage provided by the first signal transmission lines. Similarly, the second gamma voltage compensation circuit 110 is coupled to each of the second digital-to-analog converters D1201 - D2400 via Y first signal transmission lines, wherein Y is a positive integer, and in this embodiment, Y may be equal to 256, but is not limited thereto.

[0034] The digital-to-analog converter DAC2 can control the operational amplifiers A1-AX and B1-BX to provide compensation voltages, and the selection circuits SL1 and SL2 can selectively couple the operational amplifiers A1-AX and B1-BX to the second signal transmission line corresponding to the target compensation grayscale. Figure 2 In this embodiment, since the compensation voltage can be adjusted by the digital-to-analog converter DAC2, and the second signal transmission line coupled can be selected by the selection circuits SL1 and SL2, that is, the target compensation gray scale can be selected, without the need for Figure 2 The first gamma voltage compensation circuit 108 of the embodiment is similar to the second gamma voltage compensation circuit 110 and can only compensate the gamma voltage for a fixed target compensation gray scale.

[0035] It is worth noting that although the above embodiments are all described by taking 256 (m=256) first signal transmission lines as an example, it is not limited to this. In other embodiments, the number of first signal transmission lines can also be designed to be more or less. For example, m can be a positive integer that can divide 256 (that is, 256 divided by m equals p, where p is a positive integer), such as 64 or 32, but it is not limited to this. When m=64, each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400 can be coupled to the gamma circuit 102 through 64 first signal transmission lines. At this time, the number of operational amplifiers in the gamma circuit 102 can also be correspondingly reduced to 64. Each of the first digital-to-analog converters D1-D1200 and each of the second digital-to-analog converters D1201-D2400 can perform interpolation calculations based on the gamma voltages provided by the 64 first signal transmission lines to obtain the gamma voltages corresponding to each grayscale 0-256. For example, 64 first signal transmission lines can obtain gamma voltages corresponding to grayscales 0-256, and 3 second signal transmission lines can be used to compensate for 12 grayscales, for example, the 31st, 32nd, and 33rd second signal transmission lines can be used to compensate for grayscales 121-133.

[0036] In addition, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 are not limited to being disposed on one side of the source driving circuit 104 or the source driving circuit 106. In other embodiments, the first gamma voltage compensation circuit 108 and the second gamma voltage compensation circuit 110 may also be disposed in the source driving circuit 104 or the source driving circuit 106. For example, the first gamma voltage compensation circuit 108 may be disposed between the first digital-to-analog converter D601 and D602, and the second gamma voltage compensation circuit 110 may be disposed between the second digital-to-analog converter D1801 and D1802, but the present invention is not limited thereto, so that the resistance of the signal transmission line can be further prevented from affecting the speed at which the gamma voltage reaches the target voltage.

[0037] In summary, the gamma voltage compensation circuit of the embodiment of the present invention can be controlled by the gamma circuit to provide at least one compensation voltage to each digital-to-analog converter in the source driving circuit to compensate the gamma voltage corresponding to the target compensation grayscale. In this way, the gamma voltage compensation circuit is controlled by the gamma circuit to provide the compensation voltage to compensate the gamma voltage, which can effectively increase the speed at which the gamma voltage reaches the target voltage, thereby ensuring the display quality of the display device.

[0038] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the claims.

Claims

1. A display driving device, characterized in that: include: A first source driving circuit includes a plurality of first digital-to-analog converters; A second source driving circuit includes a plurality of second digital-to-analog converters; A gamma circuit, coupled to the plurality of first digital-to-analog converters and the plurality of second digital-to-analog converters, disposed between the first source driving circuit and the second source driving circuit, and providing a plurality of gamma voltages to each of the first digital-to-analog converters and each of the second digital-to-analog converters; A first gamma voltage compensation circuit, coupled to the gamma circuit and the first source driving circuit, and providing at least one first digital-to-analog converter compensation voltage to compensate the gamma voltage; as well as The second Gamma voltage compensation circuit is coupled to the Gamma circuit and the second source driving circuit, and provides the compensation voltage to at least one second digital-to-analog converter to compensate the Gamma voltage.

2. The display driving device according to claim 1, characterized in that: The gamma circuit comprises: a third digital-to-analog converter; and A plurality of first operational amplifiers are coupled to the third digital-to-analog converter, the plurality of first digital-to-analog converters, and the plurality of second digital-to-analog converters, and provide the plurality of gamma voltages according to the third digital-to-analog converter.

3. The display driving device according to claim 2, characterized in that: The first gamma voltage compensation circuit and the second gamma voltage compensation circuit respectively include: At least one second operational amplifier is coupled to the third digital-to-analog converter and provides the at least one compensation voltage according to the third digital-to-analog converter.

4. The display driving device according to claim 3, characterized in that: The gamma circuit further includes a fourth digital-to-analog converter coupled to the first gamma voltage compensation circuit and the second gamma voltage compensation circuit; The at least one second operational amplifier has an input terminal coupled to the fourth digital-to-analog converter and is controlled by the fourth digital-to-analog converter to compensate the gamma voltage; as well as The selection circuit is coupled to the output terminal of the at least one second operational amplifier, the plurality of first digital-to-analog converters, and the plurality of second digital-to-analog converters, and selects the gamma voltage compensated by the compensation voltage.

5. The display driving device according to claim 4, characterized in that: Each first digital-to-analog converter and each second digital-to-analog converter are connected to the gamma circuit through m first signal transmission lines respectively, and the selection circuit of the first gamma voltage compensation circuit and the second gamma voltage compensation circuit are coupled to the first signal transmission line corresponding to the target compensation gray scale of each first digital-to-analog converter and each second digital-to-analog converter through n second signal transmission lines respectively, wherein m and n are positive integers, and n=m.

6. The display driving device according to claim 3, characterized in that: Each first digital-to-analog converter and each second digital-to-analog converter are connected to the gamma circuit via m first signal transmission lines, respectively, and the first gamma voltage compensation circuit and the second gamma voltage compensation circuit are coupled to the first signal transmission lines corresponding to the target compensation grayscale of each first digital-to-analog converter and each second digital-to-analog converter via n second signal transmission lines, respectively, wherein m and n are positive integers, and n≦m.

7. The display driving device according to claim 6, characterized in that: m<256, the first signal transmission line outputs multiple gray levels by interpolation.

8. The display driving device according to claim 6, characterized in that: The second signal transmission line compensates for a plurality of gray levels by interpolation.

9. The display driving device according to claim 6, characterized in that: The number of the at least one second operational amplifier is less than or equal to n.

10. The display driving device according to claim 6, characterized in that: The number of the plurality of first operational amplifiers is less than or equal to m.

11. The display driving device according to claim 1, characterized in that: The first source driving circuit is disposed between the gamma circuit and the first gamma voltage compensation circuit, and the second source driving circuit is disposed between the gamma circuit and the second gamma voltage compensation circuit.

12. The display driving device according to claim 1, characterized in that: The first gamma voltage compensation circuit is disposed in the first source driving circuit, and the second gamma voltage compensation circuit is disposed in the second source driving circuit.

13. The display driving device according to claim 1, characterized in that: The first source driving circuit also includes multiple third operational amplifiers, and the second source driving circuit also includes multiple fourth operational amplifiers, each third operational amplifier is coupled between the corresponding first digital-to-analog converter and the corresponding source line, and each fourth operational amplifier is coupled between the corresponding second digital-to-analog converter and the corresponding source line. The multiple first digital-to-analog converters control the multiple third operational amplifiers to drive the corresponding source lines according to the gamma voltage and the compensation voltage, and the multiple second digital-to-analog converters control the multiple fourth operational amplifiers to drive the corresponding source lines according to the gamma voltage and the compensation voltage.

14. The display driving device according to claim 1, characterized in that: The first Gamma voltage compensation circuit and the second Gamma voltage compensation circuit are arranged at a side away from the Gamma circuit.

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