Driver circuit and method for driving display panel

Abstract

The invention provides a driver circuit and a method for driving a display panel. The driver circuit is configured to drive the display panel. The driver circuit includes an image processing circuit. The image processing circuitry is configured to receive and analyze an input image and adjust a brightness of the input image according to at least one duty cycle profile to generate an output image. The image processing circuit determines the at least one duty ratio distribution according to an analysis result of the input image. The input image includes a first region and a second region, and the brightness of the first region is adjusted to be different from the brightness of the second region.

Description

Technical Field

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

[0002] The principle of an Organic Light Emitting Diode (OLED) display emitting light is that electric holes in the light emitting layer recombine with electrons to excite the organic material to emit light. Under the same display material, the amount of light emitted is proportional to the power consumption. Therefore, in order to reduce the power consumption in the OLED display, it is necessary to minimize the amount of light emitted. A general power saving method is to dim the panel synchronously. Although this method can effectively save power, it may sacrifice some image quality, such as color shift caused by brightness changes, low brightness details, and screen contrast. This may affect the user experience. Summary of the Invention

[0003] The present invention relates to a driver circuit and a method for driving a display panel, which can reduce the power consumption of the display panel and maintain good image quality.

[0004] An embodiment of the present invention provides a driver circuit configured to drive a display panel. The driver circuit includes an image processing circuit. The image processing circuit is configured to receive and analyze an input image and adjust the brightness of the input image according to at least one duty distribution to generate an output image. The image processing circuit determines the at least one duty distribution according to the analysis result of the input image. The input image includes a first region and a second region, and the brightness of the first region is adjusted to be different from the brightness of the second region.

[0005] An embodiment of the present invention provides a method for driving a display panel, and the method includes: receiving and analyzing an input image; determining at least one duty distribution according to the analysis result of the input image; and adjusting the brightness of the input image according to the at least one duty distribution to generate an output image. The input image includes a first region and a second region, and the brightness of the first region is adjusted to be different from the brightness of the second region.

[0006] To make the above content easier to understand, several embodiments accompanied by the drawings will be elaborated in detail below. Description of the Drawings

[0007] This document includes drawings to provide a further understanding of the present invention, and the drawings are incorporated into and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and are used in conjunction with the description to explain the principles of the present invention.

[0008] Figure 1 is a block diagram showing an electronic device according to an embodiment of the present invention.

[0009] Figure 2 is a schematic diagram showing according to an embodiment of the present invention Figure 1 the shown duty ratio distribution.

[0010] Figure 3 is a schematic diagram showing the average pixel level of a pixel block of an input image according to an embodiment of the present invention.

[0011] Figure 4 is a schematic diagram showing an input image according to an embodiment of the present invention.

[0012] Figure 5 is a schematic diagram showing an input image according to an embodiment of the present invention.

[0013] Figure 6 is a schematic diagram showing an input image and a weight matrix according to an embodiment of the present invention.

[0014] Figure 7 is a schematic diagram showing different scene modes and corresponding duty ratio distributions according to an embodiment of the present invention.

[0015] Figure 8 is a schematic diagram showing the brightness adjustment of an input image according to an embodiment of the present invention.

[0016] Figure 9 is a flowchart showing a method for driving a display panel according to an embodiment of the present invention.

[0017] [Description of Symbols]

[0018] 100: Electronic device

[0019] 110: Driver circuit

[0020] 112: Image processing circuit

[0021] 120: Display panel

[0022] 200, 700_02, 700_03, 700_04, 700_11, 700_12, 700_13, 700_14: Duty ratio distribution

[0023] 200A: Duty ratio curve

[0024] 210, 710_02, 710_03, 710_04: First region distribution

[0025] 220, 720_02, 720_03, 720_04: Second region distribution

[0026] 300, 400, 500, 600, 800, D_IN: Input image

[0027] 330, 330_00, 330_01, 330_10, 330_12, 330_21, 630: Pixel block

[0028] 330_11: Pixel block / Target pixel block

[0029] 410, 510, 510’, 610: First region

[0030] 420, 520, 520’, 620: Second region

[0031] 730_03: Third region distribution

[0032] AA’: Line

[0033] APL_00, APL_10: Average pixel level

[0034] D_OUT: Output image

[0035] F1: Frame / Previous frame / Original frame

[0036] F2: Frame / Current frame

[0037] F3, F4: Frame

[0038] F5: Frame / Target frame

[0039] S100, S110, S120: Steps

[0040] W1: First weight value

[0041] W2: Second weight value

[0042] WMX: Weight matrix Detailed implementation manners

[0043] The following provides various embodiments to elaborate on the present invention in detail. However, the present invention is not limited to the provided embodiments, and the provided embodiments can be combined in an appropriate manner. The term "coupling / coupled" or "connecting / connected" used in the specification (including the claims) of this application may refer to any direct or indirect connection method. For example, "the first device is coupled to the second device" should be interpreted as "the first device is directly connected to the second device" or "the first device is indirectly connected to the second device through other devices or connection methods". Additionally, the term "signal" may refer to current, voltage, charge, temperature, data, electromagnetic waves, or any one or more signals.

[0044] Embodiments of the present invention reduce the power consumption of a display panel by reducing the light emission amount while maintaining good image quality. Different from reducing the overall image brightness, the driver circuit can drive the central region and the peripheral region with different brightness adjustments to maintain the image quality of the main visual region (e.g., the central region).

[0045] Figure 1 is a block diagram showing an electronic device according to an embodiment of the present invention. Figure 2 is a schematic diagram showing Figure 1 the duty ratio distribution shown according to an embodiment of the present invention. Refer to Figure 1 and Figure 2 , the electronic device 100 includes a driver circuit 110 and a display panel 120. The driver circuit 110 can be configured to be coupled to the display panel 120. The driver circuit 110 is configured to drive the display panel 120 to display an image. The display panel 120 can be a self-illuminated display panel (e.g., an organic light-emitting diode (OLED) panel), but the present invention is not limited thereto.

[0046] The driver circuit 110 includes an image processing circuit 112. The image processing circuit 112 is configured to receive and analyze an input image D_IN and adjust the brightness of the input image D_IN according to at least one duty ratio distribution 200 to generate an output image D_OUT. The duty ratio distribution is configured to adjust the brightness of the input image D_IN. In Figure 2 , the duty curve 200A is the brightness distribution along the line AA'. The pixel row of the display panel 120 corresponding to the line AA' is driven by the duty curve 200A and substantially has the same brightness distribution as the line AA'.

[0047] In this embodiment, the duty ratio distribution 200 includes a first region distribution 210 and a second region distribution 220, and the brightness of the first region distribution 210 is different from the brightness of the second region distribution 220. For example, the average brightness of the first region distribution 210 is less than the average brightness distribution of the second region distribution 220. Therefore, the brightness of the first region of the input image D_IN corresponding to the first region distribution 210 can be adjusted to be different from the brightness of the second region of the input image D_IN corresponding to the second region distribution 220. That is, the driver circuit 110 can drive the first region and the second region with different brightness adjustments to maintain the image quality of the main visual region (e.g., the second region), where the second region can be the central region and the first region can be the peripheral region.

[0048] The image processing circuit 112 can determine the duty ratio distribution 200 according to the analysis result of the input image D_IN. For example, the image processing circuit 112 analyzes the image complexity, frame change, or brightness distribution of the input image D_IN, so the analysis result includes at least one of the image complexity, frame change, and brightness distribution of the input image D_IN.

[0049] Regarding Figure 2 Regarding the hardware structure of the components in the illustrated embodiment, the image processing circuit 112 can be a processor with computing capabilities. As another option, the image processing circuit 112 can be designed by hardware description languages (HDL) or any other design method of digital circuits familiar to those skilled in the art, and can be a hardware circuit implemented by a field programmable gate array (FPGA), a complex programmable logic device (CPLD), or an application-specific integrated circuit (ASIC). In addition, sufficient teachings, suggestions, and implementation descriptions for the hardware structure of the image processing circuit 112 can be obtained by referring to the common general knowledge in the related art.

[0050] In this embodiment, the electronic device 100 may be an electronic device having a display function, a touch sensing function, and / or a fingerprint sensing function. In an embodiment, the electronic device 100 may be, but is not limited to, a smart phone, a non-smart phone, a wearable electronic device, a tablet computer, a personal digital assistant, a notebook computer, and other portable electronic devices that can operate independently and have a display function, a touch sensing function, and / or a fingerprint sensing function. In an embodiment, the electronic device 100 may be, but is not limited to, a portable or non-portable electronic device in a vehicle intelligent system. In an embodiment, the electronic device 100 may be, but is not limited to, smart home appliances such as a television, a computer, a refrigerator, a washing machine, a telephone, an induction cooker, a table lamp, etc.

[0051] Figure 3 is a schematic diagram showing the average pixel level of a pixel block of an input image according to an embodiment of the present invention. Refer to Figure 1 and Figure 3 , this embodiment illustrates complexity calculation. The image processing circuit 112 analyzes the image complexity of the input image 300 in a block-based manner.

[0052] Specifically, the input image 300 is divided into a plurality of pixel blocks 330, and each pixel block 330 includes a plurality of pixels and has an average pixel level (APL). For example, the pixel block 330_00 has an average pixel level APL_00, and the pixel block 330_10 has an average pixel level APL_10. Figure 3 The average pixel levels of other pixel blocks 330 are marked in Figure 3 . Only nine pixel blocks are shown in , but the number of pixel blocks is not used to limit the present invention. In an embodiment, the average pixel level may be the average brightness or the average gray value of the pixel block. The average pixel level of the pixel block 330 is used to estimate the image complexity of the input image 300.

[0053] Taking the pixel block 330_11 as an example, the image processing circuit 112 may calculate the pixel difference between the target pixel block 330_11 and the adjacent pixel block to determine the image complexity of the input image 300, and the target pixel block 330_11 and the adjacent pixel block are two adjacent pixel blocks. The adjacent pixel block may be selected from the pixel blocks 330_10, 330_12, 330_01, and 330_21 located above, below, left, and right of the target pixel block 330_11. In an embodiment, the adjacent pixel block may also be selected from the pixel blocks 330_00, 330_22, 330_20, and 330_02 located in the diagonal direction of the target pixel block 330_11. Additionally, in this embodiment, the pixel difference is the difference between the average pixel level of the target pixel block 330_11 and the average pixel level of the adjacent pixel block.

[0054] When the absolute value of the pixel difference is greater than the threshold, the image processing circuit 112 increments the count value of the target pixel block 330_11. The count value is used to indicate the image complexity of the input image 300. The maximum value of the count value of the target pixel block 330_11 is eight, and the threshold can be set as a percentage value or an absolute value of the pixel values of the target pixel block 330_11. The count values of other pixel blocks can be calculated in a similar manner. The total count value of all the pixel blocks 330 is used to estimate the image complexity of the input image 300. The larger the total count value, the more complex the input image 300 is.

[0055] In this embodiment, the average pixel level of the pixel block 330 is used to estimate the image complexity of the input image 300, but the present invention is not limited thereto. In an embodiment, the maximum pixel level or other statistical parameters of the pixel block 330 can also be used to estimate the image complexity of the input image 300. Additionally, in this embodiment, the image processing circuit 112 analyzes the image complexity of the input image 300 in a block-based manner, but the present invention is not limited thereto. In an embodiment, the image processing circuit 112 can analyze the image complexity of the input image 300 in a pixel-based manner. That is, the pixel value of each pixel can be used to estimate the image complexity. The image processing circuit 112 calculates the pixel difference between the target pixel and the adjacent pixel of the input image to determine the image complexity, and the target pixel and the adjacent pixel are two adjacent pixels.

[0056] Figure 4 is a schematic diagram showing an input image according to an embodiment of the present invention. Refer to Figure 4 , the input image 400 includes a first region 410 and a second region 420, and the first region 410 surrounds the second region 420. The first region 410 can be a peripheral region surrounding the central region, and the second region 420 can be the central region and serve as the main visual region of the main image content.

[0057] The image processing circuit 112 can Figure 3 analyze the image complexity of the first region 410 and the second region 420 in the manner shown. The analysis result can be used to indicate that the first region 410 is more complex than the second region 420. Next, the image processing circuit 112 determines the duty cycle distribution for adjusting the brightness of the input image 400 according to the analysis result. The duty cycle distribution can be set to Figure 2 the duty cycle distribution 200 shown. Thus, the brightness of the first region 410 can be adjusted to be different from the brightness of the second region 420.

[0058] For image complexity, when the first region 410 is complex, the brightness of the first region 410 can be adjusted to a lower level according to the duty cycle distribution 200. Since the first region 410 is complex, even if the brightness is adjusted to a lower level, it is not easy for the user to notice. In this way, not only can the power consumption be reduced, but also the display quality can be maintained.

[0059] Figure 5 is a schematic diagram showing an input image according to an embodiment of the present invention. Refer to Figure 1 and Figure 5 , in this embodiment, the image processing circuit 112 can detect whether the input image 500 is static or dynamic by analyzing the frame change of the input image 500.

[0060] Specifically, the input image 500 includes a previous frame F1 and a current frame F2. The previous frame F1 includes a first region 510 and a second region 520, and the first region 510 surrounds the second region 520. The current frame F2 includes a first region 510' and a second region 520', and the first region 510' also surrounds the second region 520'. The image processing circuit 112 calculates the pixel difference between the first region 510 of the previous frame F1 and the first region 510' of the current frame F2 to determine whether the first region 510' is static. The pixel difference between the first regions 510 and 510' can be the difference between the average pixel level of the first region 510 and the average pixel level of the first region 510', but the present invention is not limited thereto.

[0061] When the analysis result is that the pixel difference between the first regions 510 and 510' is lower than the threshold, it indicates that the first region 510' has not changed much over time. Next, the image processing circuit 112 determines the duty cycle distribution for adjusting the brightness of the input image 500 according to the analysis result. The duty cycle distribution can be set as Figure 2 the duty cycle distribution 200 shown. Therefore, the brightness of the first region 510' is adjusted to be different from the brightness of the second region 520'.

[0062] For the frame change of the static region, when the first region 510' is static, the brightness of the first region 510' is adjusted to a lower level. Since the first region 510' is static, even if the brightness is adjusted to a lower level, it is not easy for the user to notice. In this way, not only can the power consumption be reduced, but also the display quality can be maintained.

[0063] Figure 6 is a schematic diagram showing an input image and a weight matrix according to an embodiment of the present invention. Refer to Figure 1 and Figure 6 , in this embodiment, the image processing circuit 112 can calculate the weighted brightness value of the input image 600 according to the weight matrix WMX to estimate the brightness distribution of the input image 600.

[0064] Specifically, the input image 600 includes a first region 610 and a second region 620, and the first region 610 surrounds the second region 620. The input image 600 is divided into a plurality of pixel blocks 630. The size and number of the pixel blocks 630 are adjustable. The weight matrix WMX is used to estimate the brightness distribution of the input image 600.

[0065] For example, the weight matrix WMX includes a first weight value W1 and a second weight value W2. The first weight value W1 corresponds to the first region 610 of the input image 600, and the second weight value W2 corresponds to the second region 620 of the input image 600. In order to further estimate the brightness of the first region 610, the first weight value W1 is set to be greater than the second weight value W2. The image processing circuit 112 calculates the weighted sum of the pixel values of the first region 610 and the pixel values of the second region 620 to obtain the weighted brightness value of the input image 600. The pixel values of the first region 610 and the pixel values of the second region 620 may be the average pixel levels of the first region 610 and the second region 620, but the present invention is not limited thereto.

[0066] Since the first weight value W1 is greater than the second weight value W2, the pixel values of the first region 610 dominate in the weighted brightness value. The analysis result (i.e., the weighted brightness value) mainly represents the brightness of the first region 610. The image processing circuit 112 can estimate the brightness of the first region 610 by calculating the weighted brightness value (i.e., the weighted sum) according to the weight matrix WMX. When the analysis result is that the weighted brightness value is greater than the threshold, it indicates that the first region 610 is relatively bright. Next, the image processing circuit 112 determines the duty ratio distribution for adjusting the brightness of the input image 600 according to the analysis result. The duty ratio distribution can be set to Figure 2 the duty ratio distribution 200 shown. Therefore, the brightness of the first region 610 is adjusted to be different from the brightness of the second region 620.

[0067] For the brightness distribution, when the first region 610 is brighter, the brightness of the first region 610 is adjusted to be lower. In this embodiment, the brightness distribution of the input image 600 is analyzed and weighted calculation is performed. When the weighted brightness value is low, it indicates that the first region 610 is darker, and less brightness is reduced to avoid losing image details or causing other side effects. When the weighted brightness value is large, it indicates that the first region 610 is brighter, and more brightness is reduced.

[0068] In Figures 2 to 6In the embodiment, the duty ratio distributions 200 and the input images 400, 500, and 600 divided into two regions are taken as examples, but the present invention is not limited thereto. In the embodiment, the input image may be divided into more than two regions, and the image processing circuit 112 may select one duty ratio distribution from a plurality of duty ratio distributions according to the analysis result of the input image, and adjust the brightness of the input image according to the selected duty ratio distribution.

[0069] Figure 7 FIG. is a schematic diagram showing different scene modes and corresponding duty ratio distributions according to an embodiment of the present invention. Refer to Figure 7 , Figure 7 FIG. shows a plurality of duty ratio distributions 700_11, 700_12, 700_13, and 700_14 corresponding to different scene modes. The scene modes include a non-power-saving mode, a game mode, a media mode, and a power-saving mode. Figure 7 Only four scene modes are shown in FIG., but the types and numbers of the scene modes are not used to limit the present invention.

[0070] The duty ratio distribution 700_11 corresponds to the non-power-saving mode. The brightness of the input image is not adjusted according to the duty ratio distribution 700_11 and is maintained at 100% brightness.

[0071] The duty ratio distribution 700_12 corresponds to the game mode. The brightness of the input image is adjusted according to the duty ratio distribution 700_12, and the central region is adjusted to be brighter than the peripheral region. The duty ratio distribution 700_12 is obtained from the duty ratio distribution 700_02 by a smooth gradation change method. The duty ratio distribution 700_02 includes a first region distribution 710_02 and a second region distribution 720_02. The first region distribution 710_02 is set to 80% brightness and corresponds to the peripheral region of the input image. The second region distribution 720_02 is set to 100% brightness and corresponds to the central region of the input image. The average brightness of the first region distribution 710_02 is less than the average brightness distribution of the second region distribution 720_02.

[0072] The duty ratio distribution 700_13 corresponds to the media mode. The brightness of the input image is adjusted according to the duty ratio distribution 700_13. The duty ratio distribution 700_13 is obtained from the duty ratio distribution 700_03 by a smoothly varying manner. The duty ratio distribution 700_03 includes a first region distribution 710_03, a second region distribution 720_03, and a third region distribution 730_03. The first region distribution 710_03 is set to a brightness of 60% and corresponds to the first peripheral region of the input image. The second region distribution 720_03 is set to a brightness of 100% and corresponds to the central region of the input image. The third region distribution 730_03 is set to a brightness of 80% and corresponds to the second peripheral region of the input image. The second peripheral region surrounds the central region, and the first peripheral region surrounds the second peripheral region. The average brightness of the first region distribution 710_03 is less than the average brightness distribution of the third region distribution 730_03. The average brightness of the third region distribution 730_03 is less than the average brightness distribution of the second region distribution 720_03.

[0073] The duty ratio distribution 700_14 corresponds to the power saving mode. The brightness of the input image is adjusted according to the duty ratio distribution 700_14, and the central region is adjusted to be brighter than the peripheral region. The duty ratio distribution 700_14 is obtained from the duty ratio distribution 700_04 by a smoothly varying manner. The duty ratio distribution 700_04 includes a first region distribution 710_04 and a second region distribution 720_04. The first region distribution 710_04 is set to a brightness of 30% to reduce power consumption and corresponds to the peripheral region of the input image. The second region distribution 720_04 is set to a brightness of 100% and corresponds to the central region of the input image. The average brightness of the first region distribution 710_04 is less than the average brightness distribution of the second region distribution 720_04.

[0074] The image processing circuit 112 can select one of the duty ratio distributions 700_11, 700_12, 700_13, and 700_14 according to the analysis result of the input image, and adjust the brightness of the input image according to the selected duty ratio distribution 700_11, 700_12, 700_13, or 700_14.

[0075] Figure 8 is a schematic diagram showing the brightness adjustment of the input image according to an embodiment of the present invention. Referring to Figure 7 and Figure 8 , the input image 800 includes a plurality of frames F1 to F5. The frames F1 and F5 are in a steady state, while the frames F2, F3, and F4 are in a transient state. Figure 8 The goal is to adjust the brightness of the original frame F1 to the brightness of the target frame F5.

[0076] Specifically, the image processing circuit 112 analyzes the input image 800 and decides to adjust the input image 800 from the non-power saving mode to the power saving mode. The image processing circuit 112 selects the duty cycle distribution 700_14 according to the analysis result, and adjusts the brightness of the input image 800 according to the selected duty cycle distribution 700_14. The image processing circuit 112 gradually adjusts the brightness of the input image 800 according to the duty cycle distributions 700_11, 700_14 and their interpolation.

[0077] For example, the brightness distribution of the original frame F1 is the same as the duty cycle distribution 700_11, and the image processing circuit 112 is used to adjust the brightness distribution of the target frame F5 to be the same as the duty cycle distribution 700_14. The image processing circuit 112 calculates a first interpolation of the duty cycle distributions 700_11 and 700_14. The image processing circuit 112 calculates a second interpolation based on the duty cycle distribution 700_11 and the first interpolation. The image processing circuit 112 calculates a third interpolation based on the duty cycle distribution 700_14 and the first interpolation. The image processing circuit 112 adjusts the brightness of frames F2, F3, F4, and F5 respectively according to the second interpolation, the first interpolation, the third interpolation, and the duty cycle distribution 700_14, so as to gradually adjust the brightness of the original frame F1 to the brightness of the target frame F5.

[0078] Therefore, the brightness of the input image 800 can be adjusted according to the duty cycle distributions 700_11, 700_14 and interpolation thereof to generate an output image. Since the brightness of the input image 800 is gradually adjusted, it is not easy for the user to notice. In this way, not only power consumption can be reduced, but also display quality can be maintained.

[0079] Figure 9 FIG. 4 is a flow chart showing a method for driving a display panel according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 9 , the method for driving a display panel is at least applicable to Figure 1 The electronic device 100 is shown, but the present invention is not limited thereto.

[0080] In step S100, the image processing circuit 112 receives and analyzes the input image D_IN. In step S110, the image processing circuit 112 determines at least one duty cycle distribution 200 according to the analysis result of the input image D_IN. In step S120, the image processing circuit 112 adjusts the brightness of the input image D_IN according to the at least one duty cycle distribution 200 to generate an output image D_OUT.

[0081] The method for driving a display panel according to an embodiment of the present invention can be Figures 1 to 8 Sufficient teaching, suggestions and implementation instructions are obtained from the embodiments of the present invention, and therefore no further instructions are provided.

[0082] In summary, the embodiments of the present invention reduce the power consumption of the display panel by reducing the light emission amount while maintaining good image quality. Different from reducing the brightness of the entire image, the driver circuit can drive the central region and the peripheral region with different brightness adjustments to maintain the image quality of the main visual region (for example, the central region).

[0083] Those skilled in the art can make various modifications and variations to the disclosed embodiments without departing from the scope or spirit of the present invention. The present invention covers various modifications and variations as long as they fall within the scope of the appended claims and their equivalent scope.

Claims

1. A driver circuit configured to drive a display panel, the driver circuit comprising: An image processing circuit configured to receive and analyze an input image and adjust the brightness of the input image according to at least one duty ratio distribution to generate an output image, wherein the image processing circuit determines the at least one duty ratio distribution according to the analysis result of the input image, the input image includes a first region and a second region, and the brightness of the first region is adjusted to be different from the brightness of the second region.

2. The driver circuit according to claim 1, wherein the analysis result includes at least one of the image complexity, frame change and brightness distribution of the input image.

3. The driver circuit according to claim 2, wherein when the first region is more complex, the brightness of the first region is adjusted to be lower.

4. The driver circuit according to claim 2, wherein the image processing circuit calculates the pixel difference between a target pixel and an adjacent pixel of the input image to determine the image complexity, and the target pixel and the adjacent pixel are two adjacent pixels.

5. The driver circuit according to claim 4, wherein when the pixel difference is greater than a threshold, the image processing circuit increments the count value of the target pixel, and the count value indicates the image complexity of the input image.

6. The driver circuit according to claim 4, wherein the image processing circuit analyzes the image complexity of the input image in a block-based or pixel-based manner.

7. The driver circuit according to claim 2, wherein when the first region is more static, the brightness of the first region is adjusted to be lower.

8. The driver circuit according to claim 7, wherein the input image includes a previous frame and a current frame, and the image processing circuit calculates the pixel difference between the first region of the previous frame and the first region of the current frame to determine whether the first region is static.

9. The driver circuit according to claim 2, wherein when the first region is brighter, the brightness of the first region is adjusted to be lower.

10. The driver circuit according to claim 2, wherein the image processing circuit calculates the weighted brightness value of the input image according to a weight matrix, wherein the weight matrix includes a plurality of first weight values and a plurality of second weight values, and the first weight value is greater than the second weight value.

11. The driver circuit according to claim 10, wherein the first weight value corresponds to the first region, the second weight value corresponds to the second region, and the image processing circuit calculates the weighted sum of the pixel values of the first region and the pixel values of the second region to obtain the weighted brightness value of the input image.

12. The driver circuit according to claim 1, wherein the first region surrounds the second region.

13. The driver circuit according to claim 1, wherein the at least one duty ratio distribution includes a plurality of duty ratio distributions, and the image processing circuit gradually adjusts the brightness of the input image according to the plurality of duty ratio distributions and the interpolation of the plurality of duty ratio distributions.

14. The driver circuit according to claim 1, wherein the at least one duty ratio distribution includes a plurality of duty ratio distributions corresponding to different scene modes, and the image processing circuit selects one duty ratio distribution from the plurality of duty ratio distributions according to the analysis result of the input image, and adjusts the brightness of the input image according to the selected duty ratio distribution.

15. A method for driving a display panel, the method comprising: Receiving and analyzing an input image; Determining at least one duty ratio distribution according to the analysis result of the input image; And Adjusting the brightness of the input image according to the at least one duty ratio distribution to generate an output image, Wherein the input image includes a first region and a second region, and the brightness of the first region is adjusted to be different from the brightness of the second region.

16. The method for driving a display panel according to claim 15, wherein the analysis result includes at least one of the image complexity, frame change, and brightness distribution of the input image.

17. The method for driving a display panel according to claim 15, wherein the input image is analyzed in a block-based or pixel-based manner when receiving and analyzing the input image.

18. The method for driving a display panel according to claim 15, wherein the first region surrounds the second region.

19. The method for driving a display panel according to claim 15, wherein the at least one duty ratio distribution includes a plurality of duty ratio distributions, and the step of adjusting the brightness of the input image according to the at least one duty ratio distribution to generate the output image includes: Gradually adjusting the brightness of the input image according to the plurality of duty ratio distributions and the interpolation of the plurality of duty ratio distributions.

20. The method for driving a display panel according to claim 15, wherein the at least one duty ratio distribution includes a plurality of duty ratio distributions corresponding to different scene modes, and the step of adjusting the brightness of the input image according to the at least one duty ratio distribution to generate the output image includes: Selecting one duty ratio distribution from the plurality of duty ratio distributions according to the analysis result of the input image, and adjusting the brightness of the input image according to the selected duty ratio distribution.

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