Display driver and display driving method

Abstract

The present invention provides a display driver and a display driving method. The display driver is suitable for driving a display panel and sensing electrical characteristics of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first drive circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first drive line and a first sensing line. The first drive circuit is used to provide a first drive signal to the display panel through the first operational amplifier and the first drive line during a drive cycle. The first sensing circuit is used to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing cycle.

Description

Technical Field

[0001] The present invention relates to a driving circuit, and more particularly, to a display driver and a display driving method. Background Art

[0002] Generally speaking, since an organic light emitting diode (OLED) display panel has a problem of light brightness attenuation, a conventional display driver must be configured with an additional current integrator circuit to sense the OLED display panel. Therefore, conventional display drivers for OLED display panels have the problems of high cost and high power consumption. Therefore, regarding how to reduce the cost of the display driver and achieve power saving effects, several embodiments of solutions are provided below. Summary of the invention

[0003] The invention relates to a display driver and a display driving method, and can drive a display panel and sense the electrical characteristics of the display panel.

[0004] The display driver of the present invention is suitable for driving a display panel and sensing electrical characteristics of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first drive circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first drive line and a first sensing line. The first drive circuit is coupled to the first operational amplifier. The first drive circuit is used to provide a first drive signal to the display panel through the first operational amplifier and the first drive line during a drive cycle. The first sensing circuit is coupled to the first operational amplifier. The first sensing circuit is used to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing cycle.

[0005] The display driving method of the present invention is applicable to a display driver. The display driver includes a first amplifier circuit coupled to a display panel through a first drive line and a first sensing line. The first amplifier circuit includes a first drive circuit, a first sensing circuit, and a first operational amplifier. The display driving method includes the following steps. During a drive cycle, the first drive circuit provides a first drive signal to the display panel through the first operational amplifier and the first drive line. During a first sensing cycle, the first sensing circuit receives a first sensing signal from the display panel through the first operational amplifier and the first sensing line.

[0006] Based on the above, according to the display driver and display driving method of the present invention, the display driver can drive the display panel and sense the electrical characteristics of the display panel through one operational amplifier, so as to reduce the number of operational amplifiers in the display driver and reduce the cost of the display driver.

[0007] In order to make the foregoing content more easily understood, several embodiments are described in detail below with accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0009] Figure 1 is a schematic diagram showing an amplifier circuit according to an embodiment of the present invention.

[0010] Figure 2 is a circuit diagram showing an amplifier circuit operating in a driving mode according to an embodiment of the present invention.

[0011] Figure 3 is a circuit diagram illustrating an amplifier circuit operating in a sensing mode according to an embodiment of the present invention.

[0012] Figure 4 is a flow chart of a display driving method according to an embodiment of the present invention.

[0013] Figure 5 is a circuit diagram showing a display driver and a display panel according to an embodiment of the present invention.

[0014] Figure 6 is a flow chart of a display driving method according to another embodiment of the present invention.

[0015] Description of Figure Numbers

[0016] 100: amplifier circuit;

[0017] 101: driving line;

[0018] 102: sensing line;

[0019] 110: Operational amplifier;

[0020] 120: driving circuit;

[0021] 130: sensing circuit;

[0022] 140: Capacitor;

[0023] 151, 152, 153, 154, 155, 156, 157, 158: switch;

[0024] 200: display panel;

[0025] 500: display driver;

[0026] 510: a first amplifier circuit;

[0027] 511: first driving line;

[0028] 512: first sensing line;

[0029] 520: a second amplifier circuit;

[0030] 521: second driving line;

[0031] 522: second sensing line;

[0032] 530: a third amplifier circuit;

[0033] 531: third driving line;

[0034] 532: third sensing line;

[0035] 600: display panel;

[0036] 610: first pixel;

[0037] 611, 621, 631: photodiode;

[0038] 612, 622, 632: storage capacitors;

[0039] 613, 614, 615, 623, 624, 625, 633, 634, 635: transistors;

[0040] 620: second pixel;

[0041] 630: third pixel;

[0042] N11, N12, N21, N22, N31, N32: circuit nodes;

[0043] Vf1, Vf2, Vf3, Va, Vb: reference voltage;

[0044] S410, S420, S610, S620: steps. DETAILED DESCRIPTION

[0045] It should be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "comprising," "including," or "having" and their variations herein is intended to cover the items listed thereafter and their equivalents and additional items. Unless otherwise limited, the terms "connected," "coupled," and "mounted" and their variations herein are used in a broad sense and cover direct and indirect connections, couplings, and installations.

[0046] Figure 1 is a circuit diagram showing an amplifier circuit according to an embodiment of the present invention. Figure 1 , the amplifier circuit 100 includes an operational amplifier 110, a driving circuit 120, and a sensing circuit 130. The operational amplifier 110 is coupled to the display panel 200 through the driving line 101 and the sensing line 102, and the operational amplifier 110 is coupled to the driving circuit 120 and the sensing circuit 130. In an embodiment of the present invention, the driving circuit 120 is used to provide a driving signal to the display panel 200 through the operational amplifier 110 and the driving line 101 during a driving cycle. The sensing circuit 130 is used to receive a sensing signal from the display panel 200 through the operational amplifier 110 and the sensing line 102 during a sensing cycle. That is, the amplifier circuit 100 can drive the display panel 200 and sense the electrical characteristics of the display panel 200 in different cycles through one operational amplifier 110. In other words, the amplifier circuit 100 does not need multiple operational amplifiers to implement the functions of driving and sensing the display panel 200. Therefore, the amplifier circuit 100 has the advantages of lower cost and smaller area.

[0047] In an embodiment of the present invention, the display panel 200 includes a pixel array, and the pixel array includes a plurality of pixels arranged in an array. The plurality of pixels may include at least one of a plurality of red pixels, a plurality of green pixels, a plurality of blue pixels, or a plurality of white pixels. The display panel 200 may be an organic light emitting diode (OLED) display panel or a micro light emitting diode (LED) display panel, and the present invention is not limited thereto. In an embodiment of the present invention, the amplifier circuit 100 may correspond to one or more pixels of the display panel. In another embodiment of the present invention, the amplifier circuit 100 may be coupled to a pixel via a drive line 101 for driving a pixel, and coupled to another pixel via a sense line 102 for sensing another pixel, wherein the one pixel and the other pixel may be pixels of the same color or pixels of different colors.

[0048] In an embodiment of the present invention, the driving circuit 120 may include a receiver circuit (RX), a digital to analog converter (DAC) circuit, etc. The driving circuit 120 is used to provide a driving signal to one pixel of the display panel 200 during a driving period. In an embodiment of the present invention, the sensing circuit 130 may include a transmitter circuit (TX), an analog to digital converter (ADC) circuit, etc. The sensing circuit 130s obtains a sensing signal from one pixel or another pixel of the display panel 200 during a sensing period, and provides the processed signal to a post-processing circuit, so that the post-processing circuit can perform a determination of the light brightness attenuation degree of the display panel 200, so as to perform driving compensation on the display panel 200 accordingly.

[0049] Figure 2 is a circuit diagram showing an amplifier circuit operating in a driving mode according to an embodiment of the present invention. Figure 2 , picture Figure 1 The detailed circuit architecture of the amplifier circuit 100 is shown in FIG. Figure 1 In comparison, the amplifier circuit 100 further includes a capacitor 140 and a plurality of switches 151 to 158. In an embodiment of the present invention, the switches 151 to 158 may be a plurality of N-type switch transistors, a P-type switch transistor or a plurality of transmission gates, and the present invention is not limited thereto. In an embodiment of the present invention, a first input terminal of the operational amplifier 110 is coupled to the drive circuit 120. A second input terminal of the operational amplifier 110 is coupled to the display panel 200 through a sensing line 102. An output terminal of the operational amplifier 110 is coupled to the sensing circuit 130 and is coupled to the display panel 200 through a driving line 101. The capacitor 140 is coupled between the second input terminal and the output terminal of the operational amplifier 110.

[0050] In an embodiment of the present invention, switch 151 is coupled between the driving circuit 120 and the first input terminal of the operational amplifier 110. Switch 152 is coupled between the second input terminal and the output terminal of the operational amplifier 110. Switch 153 is coupled between the output terminal of the operational amplifier 110 and the driving line 101. Switch 154 is coupled between the sensing circuit 130 and the output terminal of the operational amplifier 110. Switch 155 is coupled between the second input terminal and the sensing line 102. Switch 156 is coupled between the reference voltage Vf1 and the sensing line 102. Switch 157 is coupled between the reference voltage Vf2 and the first input terminal of the operational amplifier 110. Switch 158 is coupled between the reference voltage Vf3 and the output terminal of the operational amplifier. In an embodiment of the present invention, the first input terminal of the operational amplifier 110 may be a non-inverting input terminal, and the second input terminal of the operational amplifier 110 may be an inverting input terminal. It should be noted that the amplifier circuit 100 may further include a control circuit, and the control circuit is used to control switches 151 to 158.

[0051] In an embodiment of the present invention, the amplifier circuit 100 is a hybrid buffer structure, and the amplifier circuit 100 can operate in a driving mode and a sensing mode in different cycles. During the driving cycle, the amplifier circuit 100 operates in a driving mode. More specifically, the switch 151, the switch 152, and the switch 153 are turned on, and the switch 154 and the switch 155 are turned off, so that the operational amplifier 110 operates in the form of a voltage follower. Therefore, the drive circuit 120 can provide a drive signal to the display panel 200 through the operational amplifier 110 and the drive line 101 during the driving cycle. Therefore, the amplifier circuit 100 can effectively provide a drive signal for driving one pixel of the display panel 200. In addition, during the driving cycle, the switch 156 can also be turned on to provide the reference voltage Vf1 to the display panel 200 through the sensing line 102. In another embodiment of the present invention, the amplifier circuit 100 may not include the switch 156.

[0052] Figure 3 is a circuit diagram showing an amplifier circuit operating in a sensing mode according to an embodiment of the present invention. Figure 3, during the sensing period, the amplifier circuit 100 operates in the sensing mode. More specifically, in an embodiment of the present invention, the switches 151, 152, and 153 are turned off, and the switches 154, 155, and 157 are turned on, so that the operational amplifier 110 and the capacitor 140 operate in the form of a current integrator. The reference voltage Vf2 is provided to the first input terminal of the operational amplifier 110 through the switch 157. For example, the capacitor 140 can be used to receive a sensing current from one pixel or another pixel in the display panel 200 during the sensing period to store the corresponding integrated value and provide the corresponding integrated value to the sensing circuit 130. Therefore, the driving circuit 120 can receive a sensing signal from one pixel or another pixel in the display panel 200 through the operational amplifier 110 and the sensing line 102 during the sensing period. Therefore, the amplifier circuit 100 can effectively receive a sensing signal for sensing the degree of light brightness attenuation of the display panel 200. In addition, during the sensing period, the switch 158 may be turned on to provide the reference voltage Vf3 to the display panel 200 through the driving line 101 , wherein the reference voltage Vf3 may be a ground voltage.

[0053] Figure 4 FIG. 1 is a flow chart of a display driving method according to an embodiment of the present invention. Figure 1 and Figure 4 , Figure 4 The display driving method can be applied to at least Figure 1 In step S410, the driving circuit 120 provides a driving signal to the display panel 200 through the operational amplifier 110 and the driving line 101 during the driving period. In step S420, the sensing circuit 130 receives a sensing signal from the display panel 200 through the operational amplifier 110 and the sensing line 102 during the sensing period. Therefore, the amplifier circuit 100 applied to the display driving method of the present invention is capable of driving the display panel 200 and sensing the electrical characteristics of the display panel 200 through one operational amplifier 110 in different periods. In addition, sufficient teachings and suggestions for the relevant internal circuits of the amplifier circuit 100, the implementation details and technical features of the amplifier circuit 100 of the embodiment can be obtained from Figures 1 to 3 The details can be found in the relevant description of the embodiments, and the details will not be repeated.

[0054] Figure 5 is a circuit diagram showing a display driver and a display panel according to an embodiment of the present invention. Figure 5, the display driver 500 may include a first amplifier circuit 510, a second amplifier circuit 520, and a third amplifier circuit 530, and the display panel 600 may include a first pixel 610, a second pixel 620, and a third pixel 630. The first pixel 610 may be a red pixel, the second pixel 620 may be a green pixel, and the third pixel 630 may be a blue pixel, but the present invention is not limited thereto. In an embodiment of the present invention, the first amplifier circuit 510 corresponds to the first pixel 610, and the first amplifier circuit 510 is coupled to the first pixel 610 through the first drive line 511 and the first sensing line 512. The second amplifier circuit 520 corresponds to the second pixel 620, and the second amplifier circuit 520 is coupled to the second pixel 620 through the second drive line 521 and the second sensing line 522. The third amplifier circuit 530 corresponds to the third pixel 630, and the third amplifier circuit 530 is coupled to the third pixel 630 through the third drive line 531 and the third sensing line 532.

[0055] In an embodiment of the present invention, the first pixel 610 includes a photodiode 611, a storage capacitor 612, and transistors 613 to 615. The first terminal of the photodiode 611 is coupled to the reference voltage Vb. The first terminal of the storage capacitor 612 is coupled to the second terminal of the photodiode 611. The first terminal of the transistor 613 is coupled to the second terminal of the storage capacitor 612, and the second terminal of the transistor 613 is coupled to the first driving line 511 through the circuit node N11. The first terminal of the transistor 614 is coupled to the reference voltage Va, the second terminal of the transistor 614 is coupled to the second terminal of the photodiode 611, and the control terminal of the transistor 614 is coupled to the first terminal of the photodiode 611. The first terminal of the transistor 615 is coupled to the first sensing line 512 through the circuit node N12, and the second terminal of the transistor 615 is coupled to the first terminal of the photodiode 611. In an embodiment of the present invention, the second pixel 620 includes a photodiode 621, a storage capacitor 622, and transistors 623 to 625, and the third pixel 630 includes a photodiode 631, a storage capacitor 632, and transistors 633 to 635. The second pixel 620 and the third pixel 630 have the same circuit architecture as the first pixel 610, and are respectively coupled to the second amplifier circuit 520 and the third amplifier circuit 530 in the same coupling manner (through circuit nodes N21, N22, N31, N32), so the detailed circuits of the second pixel 620 and the third pixel 630 are not repeated. In an embodiment of the present invention, the first sensing line 512, the second sensing line 522, and the third sensing line 532 are coupled together.

[0056] It should be noted that the first amplifier circuit 510, the second amplifier circuit 520 and the third amplifier circuit 530 each include Figure 2and Figure 3 The same circuit unit of the amplifier circuit 100 is thus referenced. Figure 2 , Figure 3 as well as Figure 5 During the driving period, the first amplifier circuit 510, the second amplifier circuit 520 and the third amplifier circuit 530 provide the first driving signal to the third driving signal to the first pixel 610, the second pixel 620 and the third pixel 630 through the first driving line 511, the second driving line 521 and the third driving line 531. In detail, during the driving period, the first driving signal to the third driving signal are provided to the transistor 614, the transistor 624 and the transistor 634, respectively, so that the transistor 614, the transistor 624 and the transistor 634 drive the photodiode 611, the photodiode 621 and the photodiode 631 to the voltage level of the first driving signal to the third driving signal. In addition, corresponding to Figure 2 As a result of the conduction of the switch 156 in , the first amplifier circuit 510 , the second amplifier circuit 520 , and the third amplifier circuit 530 may also provide the reference voltage Vf1 to the first terminals of the transistors 615 , 625 , and 635 through the first sensing line 512 , the second sensing line 522 , and the third sensing line 532 .

[0057] Taking the second amplifier circuit 520 sensing the first pixel 610 as an example, the first amplifier circuit 510 provides the first drive signal or other drive signals to the first pixel 610 through the first drive line 511 during the first sensing period, so that the transistor 614 is turned on by the transistor 613. Then, the second amplifier circuit 520 receives the sensing signal from the transistor 614 through the transistor 615, the circuit node N12 and the second sensing line 522 during the first sensing period. In an embodiment of the present invention, the sensing signal may be, for example, the source-to-drain current of the transistor 614. Therefore, the operational amplifier (e.g. Figure 3 The operational amplifier 110 in FIG. Figure 3 The capacitor 140 in the transistor 614 can integrate the source-drain current and output the corresponding integrated value to the sensing circuit of the second amplifier circuit 520, so that the post-processing circuit can effectively determine the degree of brightness attenuation of the display panel 200 according to the change of the source-drain current of the transistor 614.

[0058] In addition, since the second pixel 620 and the third pixel 630 are idle, the corresponding Figure 3As a result of the conduction of the switch 158 in the second pixel 620, the second amplifier circuit 520 and the third amplifier circuit 530 may also provide the reference voltage Vf3 to the second pixel 620 and the third pixel 630 through the second driving line 521 and the third driving line 531, wherein the reference voltage Vf3 may be a ground voltage. That is, since the second pixel 620 and the third pixel 630 are connected by controlling a transistor (e.g. Figure 3 The switch 158 in FIG. 5 is directly turned off instead of the turn-off signal output from the second amplifier circuit 520 or the third amplifier circuit 530 during the first period, so the display driver 500 can achieve a power saving effect.

[0059] However, in another embodiment of the present invention, the first pixel 610 may also be sensed by the third amplifier circuit 530. By analogy, the second pixel 620 may be sensed by the first amplifier circuit 510 or the third amplifier circuit 530 during the second sensing period, and the third pixel 630 may be sensed by the first amplifier circuit 510 or the second amplifier circuit 520 during the third sensing period. In other words, each of the pixels in the display panel 600 may be sensed by the amplifier circuit of the corresponding adjacent pixel without the need for an additional amplifier circuit. Therefore, the display driver 500 of the present invention may effectively reduce the number of operational amplifiers and reduce the cost of the display driver 500.

[0060] Figure 6 is a flow chart of a display driving method according to another embodiment of the present invention. Figure 5 and Figure 6 , the display driving method of the display driving method may be applicable to at least Figure 5 display driver 500. In step S610, the driving circuit of the second amplifier circuit 520 provides a driving signal to the second pixel 620 of the display panel 200 through the operational amplifier of the second amplifier circuit 520 and the second driving line 521 during the driving period. In step S620, the sensing circuit of the first amplifier circuit 510 receives a sensing signal from the second pixel 620 of the display panel 200 through the operational amplifier of the first amplifier circuit 510 and the first sensing line 511 during the sensing period. Therefore, the display driver 500 applied by the display driving method of the present invention is capable of effectively sensing the electrical characteristics of the display panel 600. In addition, sufficient teachings and suggestions for the relevant internal circuits of the display driver 500, the implementation details and technical features of the display driver 500 of the embodiment can be obtained from Figures 1 to 5 The details can be found in the relevant description of the embodiments, and the details will not be repeated.

[0061] In summary, the display driver and display driving method of the present invention can perform driving operations and sensing operations in different cycles through one operational amplifier by controlling multiple switches, wherein one operational amplifier operates in the form of a current integrator or a voltage follower in different cycles. In other words, the display driver of the present invention does not require an additional current integrator circuit to sense the display panel. Therefore, the display driver and display driving method of the present invention can effectively reduce the cost of the display driver and achieve power saving effects through a specific amplifier circuit design.

[0062] It will be apparent to those skilled in the art that various modifications and variations may be made to the disclosed embodiments without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention encompasses modifications and variations provided that the modifications and variations fall within the scope of the appended claims and their equivalents.

Claims

1. A display driver, It is characterized in that Suitable for driving a display panel and sensing electrical characteristics of the display panel, wherein the display driver comprises: A first amplifier circuit is coupled to a first pixel in the display panel, wherein the pixel includes a photodiode, a first transistor, and a second transistor, wherein the first amplifier circuit includes: a first operational amplifier coupled to the first pixel of the display panel through a first driving line and a first sensing line, wherein a first terminal of the first transistor is coupled to the first sensing line, and a second terminal of the first transistor is coupled to a first terminal of the photodiode, wherein a first terminal of the second transistor is coupled to a reference voltage, a second terminal of the second transistor is coupled to a second terminal of the photodiode, and a control terminal of the second transistor is coupled to the first terminal of the photodiode; a first driving circuit coupled to the first operational amplifier and configured to provide a first driving signal to the first pixel of the display panel through the first operational amplifier and the first driving line during a driving period; and a first sensing circuit coupled to the first operational amplifier and configured to receive a first sensing signal from the second transistor of the first pixel of the display panel through the first operational amplifier and the first sensing line during a first sensing period, The first sensing signal is a source-drain current of the second transistor and is used to sense a brightness attenuation degree of the display panel.

2. The display driver according to claim 1, It is characterized in that A first input terminal of the first operational amplifier is coupled to the first driving circuit, a second input terminal of the first operational amplifier is coupled to the display panel through the first sensing line, and an output terminal of the first operational amplifier is coupled to the first sensing circuit and to the display panel through the first driving line.

3. The display driver according to claim 2, It is characterized in that The first amplifier circuit further comprises: a first switch coupled between the first driving circuit and the first input terminal of the first operational amplifier; a second switch coupled between the second input terminal and the output terminal of the first operational amplifier; a third switch coupled between the output terminal of the first operational amplifier and the first driving line; a fourth switch coupled between the first sensing circuit and the output terminal of the first operational amplifier; a fifth switch coupled between the second input terminal and the first sensing line; and The first capacitor is coupled between the second input terminal and the output terminal of the first operational amplifier.

4. The display driver according to claim 3, It is characterized in that During the driving period, the first switch, the second switch, and the third switch are turned on, and the fourth switch and the fifth switch are turned off, so that the first operational amplifier operates in the form of a voltage follower and provides the first driving signal to the display panel.

5. The display driver according to claim 4, It is characterized in that The first amplifier circuit further comprises: A sixth switch is coupled between a first reference voltage and the first sensing line, wherein the sixth switch is turned on during the driving period.

6. The display driver according to claim 3, It is characterized in that During the first sensing period, the first switch, the second switch, and the third switch are turned off, and the fourth switch and the fifth switch are turned on, so that the first operational amplifier and the first capacitor operate in the form of a current integrator and provide the first sensing signal to the first sensing circuit.

7. The display driver according to claim 6, It is characterized in that The first amplifier circuit further comprises: A seventh switch is coupled between a second reference voltage and the first input terminal of the first operational amplifier, wherein the seventh switch is turned on during the first sensing period.

8. The display driver according to claim 3, It is characterized in that The first amplifier circuit further comprises: An eighth switch is coupled between a third reference voltage and the output terminal of the first operational amplifier, wherein the eighth switch is turned off during the driving period and turned on during the first sensing period.

9. The display driver according to claim 1, It is characterized in that The first amplifier circuit is coupled to the first pixel of the display panel through the first sensing line and the first driving line, and the display driver further includes: A second amplifier circuit is coupled to a second pixel of the display panel, wherein the second amplifier circuit comprises: a second operational amplifier coupled to the second pixel of the display panel through a second driving line; and a second driving circuit coupled to the second operational amplifier and configured to provide a second driving signal to the second pixel of the display panel through the second operational amplifier and the second driving line during the driving period, The first driving circuit is used to provide the first driving signal to the first pixel of the display panel through the first operational amplifier and the first driving line during the driving period.

10. The display driver according to claim 9, It is characterized in that The second sensing line is coupled to the second pixel of the display panel, and the first sensing line is coupled to the second sensing line, The second driving circuit of the second amplifier circuit is also used to provide the second driving signal to the second pixel of the display panel through the second operational amplifier and the second driving line during the first sensing period, and the first sensing circuit of the first amplifier circuit is used to receive the first sensing signal from the second pixel of the display panel through the first operational amplifier and the second sensing line during the first sensing period.

11. The display driver according to claim 9, It is characterized in that The second operational amplifier is also coupled to the second pixel of the display panel through a second sensing line, and the first sensing line is coupled to the second sensing line, wherein the second amplifier circuit further includes: The second sensing circuit is coupled to the second operational amplifier and is configured to receive a second sensing signal from the first pixel of the display panel through the second operational amplifier and the first sensing line during a second sensing period.

12. The display driver according to claim 11, It is characterized in that The first driving circuit is further configured to provide the first driving signal to the first pixel of the display panel through the first operational amplifier and the first driving line during the second sensing period.

13. A display driving method, applicable to a display driver, It is characterized in that The display driver includes a first amplifier circuit coupled to a display panel through a first drive line and a first sensing line, the first amplifier circuit is coupled to a first pixel in the display panel, wherein the pixel includes a photodiode, a first transistor, and a second transistor, and the first amplifier circuit includes a first drive circuit, a first sensing circuit, and a first operational amplifier, the first operational amplifier is coupled to the first pixel of the display panel through the first drive line and the first sensing line, wherein a first terminal of the first transistor is coupled to the first sensing line, and a second terminal of the first transistor is coupled to a first terminal of the photodiode, wherein a first terminal of the second transistor is coupled to a reference voltage, a second terminal of the second transistor is coupled to a second terminal of the photodiode, and a control terminal of the second transistor is coupled to the first terminal of the photodiode, wherein the display driving method includes: providing a first drive signal to the first pixel of the display panel by the first drive circuit through the first operational amplifier and the first drive line during a drive period; and receiving a first sensing signal from the second transistor of the first pixel of the display panel by the first sensing circuit through the first operational amplifier and the first sensing line during a first sensing period, The first sensing signal is a source-drain current of the second transistor and is used to sense a brightness attenuation degree of the display panel.

14. The display driving method according to claim 13, It is characterized in that A first input terminal of the first operational amplifier is coupled to the first driving circuit, a second input terminal of the first operational amplifier is coupled to the display panel through the first sensing line, and an output terminal of the first operational amplifier is coupled to the first sensing circuit and to the display panel through the first driving line.

15. The display driving method according to claim 14, It is characterized in that The first amplifier circuit further comprises: a first switch coupled between the first driving circuit and a first input terminal of the first operational amplifier; a second switch coupled between a second input terminal and the output terminal of the first operational amplifier; a third switch coupled between the output terminal of the first operational amplifier and the first driving line; a fourth switch coupled between the first sensing circuit and the output terminal of the first operational amplifier; a fifth switch coupled between the second input terminal and the first sensing line; and The first capacitor is coupled between the second input terminal and the output terminal of the first operational amplifier.

16. The display driving method according to claim 15, It is characterized in that The step of providing the first drive signal to the display panel by the first drive circuit through the first operational amplifier and the first drive line during the drive period comprises: During the driving period, the first switch, the second switch, and the third switch are turned on, and the fourth switch and the fifth switch are turned off, wherein the first operational amplifier operates in the form of a voltage follower and provides the first driving signal to the display panel.

17. The display driving method according to claim 16, It is characterized in that The first amplifier circuit further includes a sixth switch coupled between a first reference voltage and the first sensing line, and the sixth switch is turned on during the driving period.

18. The display driving method according to claim 15, It is characterized in that The step of receiving the first sensing signal from the display panel by the first sensing circuit through the first operational amplifier and the first sensing line during the first sensing period includes: During the first sensing period, the first switch, the second switch, and the third switch are turned off, and the fourth switch and the fifth switch are turned on, wherein the first operational amplifier and the first capacitor operate in the form of a current integrator and provide the first sensing signal to the first sensing circuit.

19. The display driving method according to claim 18, It is characterized in that The first amplifier circuit further includes a seventh switch coupled between a second reference voltage and the first input terminal of the first operational amplifier, and the seventh switch is turned on during the first sensing period.

20. The display driving method according to claim 15, It is characterized in that The first amplifier circuit further includes an eighth switch coupled between a third reference voltage and the output terminal of the first operational amplifier, wherein the eighth switch is turned off during the driving period and the eighth switch is turned on during the first sensing period.

21. The display driving method according to claim 13, It is characterized in that The first amplifier circuit is coupled to the first pixel of the display panel through the first sensing line and the first driving line, and the display driver further includes a second amplifier circuit coupled to the second pixel of the display panel through a second driving line, wherein the second amplifier circuit includes a second driving circuit, a second sensing circuit, and a second operational amplifier, wherein the step of providing the first driving signal to the display panel through the first operational amplifier and the first driving line by the first driving circuit during the driving period includes: providing the first driving signal to the first pixel of the display panel by the first driving circuit through the first operational amplifier and the first driving line during the driving period; and A second driving signal is provided by the second driving circuit to the second pixel of the display panel through the second operational amplifier and the second driving line during the driving period.

22. The display driving method according to claim 21, It is characterized in that The second sensing line is coupled to the second pixel of the display panel, and the first sensing line is coupled to the second sensing line, and the step of receiving the first sensing signal from the display panel through the first operational amplifier and the first sensing line by the first sensing circuit during the first sensing period includes: providing the second driving signal to the second pixel of the display panel by the second driving circuit through the second operational amplifier and the second driving line during the first sensing period; and The first sensing signal is received by the first sensing circuit from the second pixel of the display panel through the first operational amplifier and the second sensing line during the first sensing period.

23. The display driving method according to claim 21, It is characterized in that The second operational amplifier is also coupled to the second pixel of the display panel through a second sensing line, and the first sensing line is coupled to the second sensing line, and the second amplifier circuit further includes a second sensing circuit, wherein the display driving method further includes: A second sensing signal is received by the second sensing circuit from the first pixel of the display panel through the second operational amplifier and the first sensing line during a second sensing period.

24. The display driving method according to claim 23, It is characterized in that The display driving method further comprises: The first driving signal is provided by the first driving circuit to the first pixel of the display panel through the first operational amplifier and the first driving line during the second sensing period.

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