TWI867915B - Smear compensation circuit, display device and information processing device - Google Patents

Abstract

The present invention discloses a smear compensation circuit for integration in a display driver chip, and includes a first buffer, a second buffer, a first compensation unit, a second compensation unit, a motion detection unit, and a selection unit, wherein the first buffer is used to cache a previous frame of display data, and the second buffer is used to cache a historical frame sequence number and a historical compensation data. It is particularly noted that the smear compensation circuit of the present invention with the above-mentioned structure can perform overdrive compensation for a single frame of display data or perform overdrive compensation for a plurality of consecutive frames of display data. In other words, compared to the known overdrive compensation circuit containing multiple frame buffers, the present invention successfully implements overdrive compensation for continuous multiple frame display data by simply adding one buffer in hardware, thereby saving chip area and power consumption, and thus having a higher practical value.

Description

Smear compensation circuit, display device and information processing device

The present invention relates to the technical field of OLED displays, and more particularly to a smear compensation circuit, which is used to compensate for smear on a displayed image when a finger slides across the screen.

It is known that due to its many advantages such as flexibility, self-luminescence, no need for backlight modules and color filters, no viewing angle restrictions, fast response speed, ultra-high contrast, low power consumption, etc., OLED panels have become the mainstream display panels for displays of mobile electronic devices such as smart phones, smart watches, tablet computers, head-mounted display devices, and notebook computers. Of course, OLED panels are also used in the manufacture of OLED displays and OLED TVs. Figure 1 is a block diagram of a known OLED display. As shown in Figure 1, the known OLED display 1a includes: an OLED panel 11a and at least one display driver chip 12a, wherein the OLED panel 11a includes M×N sub-pixel units, and each sub-pixel unit includes a sub-pixel and a pixel circuit for controlling the light emission of the sub-pixel.

It should be known that the R sub-pixel, the G sub-pixel and the B sub-pixel constitute one pixel, and the aforementioned three sub-pixels are respectively red light OLED elements, green light OLED elements and blue light OLED elements in the OLED panel 11a. Electronic engineers familiar with the design and manufacture of OLED displays know that due to the material characteristics of the luminescent material, the red light OLED element (i.e., the R sub-pixel) at low gray levels will show component defects such as slow response and difficulty in lighting. Practical experience shows that when the OLED display 1a displays a low gray level image, if the user slides the screen of the OLED display 1a with a finger to control the movement of the display image, the component defects of the aforementioned red light OLED element will cause the display image to have a ghosting effect. In addition, it will cause the display image to be purple/bluish, resulting in a poor user experience.

In view of this, as shown in FIG. 1 , the prior art integrates an overdrive compensation circuit 2a in the display driver chip 12a, and is used to perform an overdrive compensation operation on an input display data to generate an output display data when the display screen is detected to be moving, so that the display driver chip 12a drives the OLED panel 11a according to the output display data to display the current frame display screen.

FIG2 is a first circuit block diagram of the overdrive compensation circuit 2a shown in FIG1. As shown in FIG2, the overdrive compensation circuit 2a includes: a frame buffer 21a, a compensation unit 22a and a data synthesis unit 23a, wherein the frame buffer 21a is used to receive a current frame display data and buffer it as a previous frame display data. On the other hand, the compensation unit 22a receives the current frame display data and accesses the frame buffer 21a to obtain the previous frame display data, and finally generates a frame compensation data according to the current frame display data and the previous frame display data. Specifically, the compensation unit 22a includes a lookup table, and the lookup table includes: a plurality of first grayscale values corresponding to the current frame display data, a plurality of second grayscale values corresponding to the previous frame display data, and a plurality of compensation values corresponding to the plurality of first grayscale values and the plurality of second grayscale values. Therefore, it can be understood that the compensation unit 22a can find the corresponding first grayscale value in the lookup table according to a grayscale value in the current frame display data, and find the corresponding second grayscale value in the lookup table according to a grayscale value in the previous frame display data, and finally find a compensation value corresponding to both the first grayscale value and the first grayscale value. After completing the search operation of one frame of display data, a frame of compensation data is obtained. Then, the data synthesis unit 23a synthesizes the frame of compensation data and the current frame of display data into an output display data.

However, practical experience shows that the overdrive compensation circuit 2a can only perform overdrive compensation for a single frame of display data, which limits its practical application. To be more specific, when the OLED panel 11a is driven to continuously display multiple frames (e.g., 5 frames) of low-grayscale images, the overdrive compensation circuit 2a cannot perform overdrive compensation for the continuous 5 frames of display data, resulting in the display screen still having ghosting, causing a poor user experience.

Furthermore, FIG3 is a second circuit block diagram of the overdrive compensation circuit 2a shown in FIG1. In order to enable the overdrive compensation circuit 2a to have the function of overdrive compensation for the continuous display of multiple frames of display data, as shown in FIG3, the prior art expands the number of the frame buffers 21a to N. However, it can be foreseen that when the number of the frame buffers 21a is expanded to N, the circuit area of the display driver chip 12a is also expanded, and the power consumption of the display driver chip 12a is also increased. In other words, increasing the number of the frame buffers 21a to N so that the overdrive compensation circuit 2a has the function of overdrive compensation for the continuous display of multiple frames of display data is obviously not the best solution acceptable in practice. In view of this, it should be considered to improve the circuit architecture and/or data processing algorithm of the existing overdrive compensation circuit 2a so that it can overdrive compensation for a single frame or continuous multiple frames of display pictures, thereby eliminating the smear and/or avoiding the display picture from being purple/blue.

From the above description, it can be seen that a smear compensation circuit is urgently needed in this field.

The main purpose of the present invention is to provide a smear compensation circuit, which has a specially designed structure so that it can perform overdrive compensation for a single frame of display data or perform overdrive compensation for continuous multiple frames of display data. To explain in more detail, compared with the overdrive compensation circuit containing N frame buffers in the prior art, the smear compensation circuit of the present invention only adds one buffer in hardware to successfully implement overdrive compensation for continuous multiple frames of display data, saving chip area and power consumption, and having a higher practical value.

To achieve the above-mentioned purpose, the present invention proposes an embodiment of the smear compensation circuit, which is used to be integrated into a display driver chip and includes: A cache unit, configured to cache a j-1 frame display data, and also configured to cache a historical compensation data and a historical frame sequence number corresponding to the historical compensation data; A first compensation unit, configured to receive a j-1 frame display data as an input display data, and read the j-1 frame display data from the cache unit, and then generate a first smear compensation data according to the j-1 frame display data and the j-1 frame display data; A motion detection unit is coupled to the j-th frame display data and is configured to read the j-1-th frame display data from the cache unit, and after performing an image motion detection operation on the j-th frame display data and the j-1-th frame display data, determine whether the display image corresponding to the j-1-th frame display data moves relative to the display image corresponding to the j-th frame display data, and then generate an image motion indication signal; A second compensation unit, coupled to the buffer unit, the first compensation unit and the motion detection unit, and configured to combine the historical compensation data and an attenuation parameter into a second drag compensation data when the historical frame number is less than N; wherein j and N are both positive integers; A selection unit, coupled to the second compensation unit, the first compensation unit and the motion detection unit, and configured to determine whether to output the first drag compensation data generated by the first compensation unit or the second drag compensation data generated by the second compensation unit according to the image motion indication signal; and A data synthesis unit is coupled to the selection unit and the j-th frame display data, and is configured to synthesize the first smear compensation data output by the selection unit and the j-th frame display data into an output display data, or synthesize the second smear compensation data output by the selection unit and the j-th frame display data into the output display data.

In one embodiment, the cache unit includes: a first cache configured to cache the j-1th frame display data and coupled to the first compensation unit and the motion detection unit; and a second cache configured to cache the historical compensation data and the historical frame sequence number and coupled to the second compensation unit.

In one embodiment, the second compensation unit includes: A multiplexer configured to determine whether to output the first smear compensation data generated by the first compensation unit as a current compensation data or to directly output the historical compensation data read from the second buffer as the current compensation data according to the image motion indication signal; An adder configured to add 1 to the historical frame number read from the second buffer to obtain a current frame number; and A multiplier configured to perform a multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data.

In one embodiment, the second compensation unit is configured to perform the following functions: According to the image motion indication signal, the first smear compensation data generated by the first compensation unit is used as the current compensation data, and then the current compensation data is cached in the second buffer to become the updated historical compensation data, and the historical frame number cached in the second buffer is initialized to 0; According to the image motion indication signal, the historical frame number and the historical compensation data are read from the second buffer; When the historical frame number is not less than N, the historical frame number and the historical compensation data cached in the second buffer are initialized to 0 at the same time; When the historical frame number is less than N, the historical frame number is increased by 1 to obtain the updated current frame number; Determine an attenuation parameter corresponding to the current frame number, and then perform the multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data; and The read historical compensation data is used as the updated current compensation data, and then the current compensation data is cached in the second buffer as the updated historical compensation data. At the same time, the current frame number is cached in the second buffer as the updated historical frame number.

In one embodiment, the first buffer is a frame buffer and the second buffer is a data buffer.

Furthermore, the present invention also proposes an embodiment of a display device, which includes a display panel and at least one display driver chip, wherein the display driver chip integrates a smear compensation circuit, and the smear compensation circuit includes: A cache unit configured to cache a j-1th frame display data, and also configured to cache a historical compensation data and a historical frame sequence number corresponding to the historical compensation data; A first compensation unit is configured to receive a j-th frame of display data as an input display data, and read the j-1-th frame of display data from the cache unit, and then generate a first smear compensation data according to the j-th frame of display data and the j-1-th frame of display data; A motion detection unit is coupled to the j-th frame display data and is configured to read the j-1-th frame display data from the cache unit, and after performing an image motion detection operation on the j-th frame display data and the j-1-th frame display data, determine whether the display image corresponding to the j-1-th frame display data moves relative to the display image corresponding to the j-th frame display data, and then generate an image motion indication signal; A second compensation unit, coupled to the buffer unit, the first compensation unit and the motion detection unit, and configured to combine the historical compensation data and an attenuation parameter into a second drag compensation data when the historical frame number is less than N; wherein j and N are both positive integers; A selection unit, coupled to the second compensation unit, the first compensation unit and the motion detection unit, and configured to determine whether to output the first drag compensation data generated by the first compensation unit or the second drag compensation data generated by the second compensation unit according to the image motion indication signal; and A data synthesis unit is coupled to the selection unit and the j-th frame display data, and is configured to synthesize the first smear compensation data output by the selection unit and the j-th frame display data into an output display data, or synthesize the second smear compensation data output by the selection unit and the j-th frame display data into the output display data.

In one embodiment, the cache unit includes: a first cache configured to cache the j-1th frame display data and coupled to the first compensation unit and the motion detection unit; and a second cache configured to cache the historical compensation data and the historical frame sequence number and coupled to the second compensation unit.

In one embodiment, the second compensation unit includes: A multiplexer configured to determine whether to output the first smear compensation data generated by the first compensation unit as a current compensation data or to directly output the historical compensation data read from the second buffer as the current compensation data according to the image motion indication signal; An adder configured to add 1 to the historical frame number read from the second buffer to obtain a current frame number; and A multiplier configured to perform a multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data.

In one embodiment, the second compensation unit is configured to perform the following functions: According to the image motion indication signal, the first smear compensation data generated by the first compensation unit is used as the current compensation data, and then the current compensation data is cached in the second buffer to become the updated historical compensation data, and the historical frame number cached in the second buffer is initialized to 0; According to the image motion indication signal, the historical frame number and the historical compensation data are read from the second buffer; When the historical frame number is not less than N, the historical frame number and the historical compensation data cached in the second buffer are initialized to 0 at the same time; When the historical frame number is less than N, the historical frame number is increased by 1 to obtain the updated current frame number; Determine an attenuation parameter corresponding to the current frame number, and then perform the multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data; and The read historical compensation data is used as the updated current compensation data, and then the current compensation data is cached in the second buffer as the updated historical compensation data. At the same time, the current frame number is cached in the second buffer as the updated historical frame number.

In one embodiment, the first buffer is a frame buffer and the second buffer is a data buffer.

Furthermore, the present invention also proposes an embodiment of an information processing device, which is characterized in that it contains at least one display device of the present invention as described above.

In one embodiment, the information processing device is an electronic device selected from the group consisting of a head-mounted display device, a smart TV, a smart phone, a smart watch, a tablet computer, an all-in-one computer, a laptop computer, an in-vehicle entertainment device, a digital camera, and a video door phone.

In order to enable the Review Committee to further understand the structure, features, purpose, and advantages of the present invention, the following are attached with drawings and detailed descriptions of preferred specific embodiments.

FIG4 is a block diagram of a display device including a smear compensation circuit of the present invention. As shown in FIG4, the display device 1 is, for example, an OLED display device, and includes: an OLED panel 11 and at least one display driver chip 12, wherein the display driver chip 12 integrates the smear compensation circuit 2 of the present invention. Furthermore, FIG5 is a circuit block diagram of a smear compensation circuit of the present invention. As shown in FIG5, the smear compensation circuit 2 of the present invention includes: a first buffer 21, a first compensation unit 22, a motion detection unit 23, a second buffer 24, a second compensation unit 25, a selection unit 26, and a data synthesis unit 27.

According to the design of the present invention, the first buffer 21 is configured to buffer a j-1th frame display data, and is also coupled to the first compensation unit 22 and the motion detection unit 23. On the other hand, the first compensation unit 22 is coupled to the input display data (i.e., the j-th frame display data), and is configured to read the j-1th frame display data from the first buffer 21, and then generate a first smear compensation data according to the j-th frame display data and the j-1th frame display data. Wherein, j is a positive integer, the first compensation unit 22 comprises a lookup table, and the lookup table includes: a plurality of first grayscale values corresponding to the display data of the current frame (i.e., the j-th frame), a plurality of second grayscale values corresponding to the display data of the previous frame (i.e., the j-1-th frame), and a plurality of compensation values corresponding to the plurality of first grayscale values and the plurality of second grayscale values. Therefore, it can be understood that the first compensation unit 22 can find the corresponding first grayscale value in the lookup table according to a grayscale value in the j-th frame display data, and find the corresponding second grayscale value in the lookup table according to a grayscale value in the j-1-th frame display data, and finally find a compensation value corresponding to both the first grayscale value and the first grayscale value. After completing the search operation of a frame display data, a frame of the first streaking compensation data is obtained.

To explain in more detail, the motion detection unit 23 is coupled to the j-th frame display data (i.e., the current input display data) and is configured to read the j-1-th frame display data from the first buffer 21, and after performing an image motion detection operation on the j-th frame (i.e., the current frame) display data and the j-1-th frame (i.e., the previous frame) display data, determine whether the display image corresponding to the j-1-th frame display data moves relative to the display image corresponding to the j-th frame display data, and then generate an image motion indication signal. Moreover, as shown in FIG5 , the second buffer 24 is configured to buffer a historical compensation data and a historical frame number corresponding to the historical compensation data. On the other hand, the second compensation unit 25 is coupled to the second buffer 24, the first compensation unit 22 and the motion detection unit 23, and is configured to combine the historical compensation data and an attenuation parameter into a second smear compensation data when the historical frame number is less than N. Wherein, j and N are both positive integers.

Fig. 6 is a circuit diagram of the second compensation unit 25 shown in Fig. 5. As shown in Fig. 5 and Fig. 6, in one embodiment, the second compensation unit 25 includes: a multiplexer 251, an adder 252 and a multiplier 253, wherein the multiplexer 251 is configured to determine whether to output the first smear compensation data (Offset_s) generated by the first compensation unit 22 as a current compensation data (Offset') or to output the historical compensation data read from the second buffer 24 as the current compensation data (Offset') according to the image motion indication signal (md_flag). On the other hand, the adder 252 is configured to add 1 to the historical frame number (index) read from the second buffer 24 to obtain a current frame number (index'). Furthermore, the multiplier 253 is configured to perform a multiplication operation on the historical compensation data (Offset) read from the second buffer 24 and the attenuation parameter (S) to generate the second smear compensation data (Offset_m).

To explain in more detail, the selection unit 26 is coupled to the second compensation unit 25, the first compensation unit 22 and the motion detection unit 23, and is configured to determine the first ghost compensation data output generated by the first compensation unit 22, or determine the second ghost compensation data output generated by the second compensation unit 25, based on the image motion indication signal. Furthermore, the data synthesis unit 27 is coupled to the selection unit 26 and the j-th frame display data (i.e., the current input display data), and is configured to synthesize the first ghosting compensation data output by the selection unit 26 and the j-th frame display data into an output display data, or to synthesize the second ghosting compensation data output by the selection unit 26 and the j-th frame display data into the output display data.

In particular, in the present invention, the second compensation unit 25 is configured to perform the following functions: (a) Based on an image motion indication signal (md_flag) output by the motion detection unit 23, a first smear compensation data (Offset_s) generated by the first compensation unit 22 is used as a current compensation data (Offset'), and then the current compensation data is cached in the second buffer 24 to become a historical compensation data (Offset), and at the same time, a historical frame number (index) whose value is 0 is cached in the second buffer 24; that is, the index is initialized to 0; (b) Reading the historical frame number and the historical compensation data from the second buffer 24 according to the image motion indication signal; (c) When the historical frame number is not less than N, simultaneously initializing the historical frame number and the historical compensation data cached in the second buffer 24 to 0; (d) When the historical frame number is less than N, adding 1 to the historical frame number to obtain a current frame number (index'=index+1); (e) determining an attenuation parameter (S) corresponding to the current frame number, and then performing the multiplication operation on the historical compensation data (Offset) read from the second buffer 24 and the attenuation parameter to generate a second smear compensation data (Offset_m); and (f) using the read historical compensation data (Offset) as the updated current compensation data (Offset'), and then storing the current compensation data back in the second buffer 24 as the updated historical compensation data, and at the same time, storing the current frame number (index') in the second buffer as the updated historical frame number (index).

By configuring the second compensation unit 25 to have the aforementioned multiple functions, the smear compensation circuit 2 of the present invention can perform overdrive compensation for a single frame of display data or perform overdrive compensation for continuous multiple frames of display data. It should be understood that performing overdrive compensation for continuous multiple frames of display data includes multiple overdrive compensations, while performing overdrive compensation for continuous two frames of display data only requires one overdrive compensation.

When performing the first overdrive compensation (i.e., one-time overdrive compensation), the workflow of the drag compensation circuit 2 of the present invention includes the following steps: Step S1: The first buffer 21 buffers a j-1 frame display data; Step S2: The first compensation unit 22 receives a j-1 frame display data as the current input display data, and reads the j-1 frame display data from the first buffer 21, and then generates a first drag compensation data (Offset_s) according to the j-1 frame display data and the j-1 frame display data; Step S3: The motion detection unit 23 receives the j-th frame display data and the j-1-th frame display data, and then performs an image motion detection operation to determine whether the display image corresponding to the j-1-th frame display data moves relative to the display image corresponding to the j-th frame display data, and generates an image motion indication signal (md_flag); Step S4: Based on the image motion indication signal, the selection unit 26 determines to output the first smear compensation data generated by the first compensation unit 22; Step S5: The data synthesis unit 27 synthesizes the first smear compensation data and the j-th frame display data (i.e., the current input display data) into an output display data; and Step S6: The second compensation unit 25 receives the first smear compensation data (Offset_s), and uses the first smear compensation data as a current compensation data (Offset'), and then caches the current compensation data in the second buffer 24 as a historical compensation data (Offset), and at the same time initializes a historical frame index (index) cached in the second buffer 24 to 0.

When the second overdrive compensation is performed, the value of j is increased by 1. At this time, the working process of the smear compensation circuit 2 of the present invention is to repeatedly execute the aforementioned steps S1~S3, and further execute the following steps: Step S7: The second compensation unit 25 reads the historical compensation data (Offset) and the historical frame number (index) from the second buffer 24; Step S8: Determine whether index＜N, if not, execute step S9; if yes, execute step S10; Step S9: Initialize the historical compensation data and the historical frame number cached by the second buffer 24 to 0 at the same time, and then repeat step S1; Step S10: The second compensation unit 25 adds 1 to the historical frame number to obtain the current frame number (index'=index+1), and determines an attenuation parameter (S) corresponding to the current frame number; Step S11: The second compensation unit 25 performs a multiplication operation on the historical compensation data (Offset) and the attenuation parameter (S) to generate a second smear compensation data (Offset_m); Step S12: According to the image motion indication signal, the selection unit 26 decides to output the second smear compensation data generated by the second compensation unit 25; Step S13: The data synthesis unit 27 synthesizes the second smear compensation data and the j-th frame display data (i.e., the current input display data) into an output display data; and Step S14: The second compensation unit 25 uses the read historical compensation data (Offset) as the current compensation data (Offset'), and then caches the current compensation data in the second buffer 24 as the updated historical compensation data (Offset), and caches the current frame number (index') in the second buffer 24 as the updated historical frame number (index).

It should be understood that when performing the 3rd, 4th, ..., Nth overdrive compensation, the working process of the drag compensation circuit 2 of the present invention repeats the aforementioned working steps. In this way, the historical frame number (Offset) can be kept unchanged during the 3rd, 4th, ..., Nth overdrive compensation, and the pre-made attenuation parameter (S) and the read historical frame number are used to generate the second drag compensation data applicable to the 3rd, 4th, ..., Nth overdrive compensation. Moreover, relative to the historical frame number remaining unchanged, the historical frame number (index) is updated accordingly with the update of the current frame number (index').

Thus, the above description has completely and clearly described the smear compensation circuit of the present invention; and, from the above description, it can be known that the present invention has the following advantages:

(1) The present invention discloses a smear compensation circuit, which is used to be integrated into a display driver chip, and includes a first buffer, a second buffer, a first compensation unit, a second compensation unit, a motion detection unit, and a selection unit. In particular, the smear compensation circuit of the present invention with the above-mentioned structure can perform overdrive compensation for a single frame of display data or perform overdrive compensation for a plurality of consecutive frames of display data. In other words, compared to the known overdrive compensation circuit containing multiple frame buffers, the present invention successfully implements overdrive compensation for continuous multiple frame display data by simply adding one buffer in hardware, thereby saving chip area and power consumption, and thus having a higher practical value.

(2) The present invention also provides a display device, which includes a display panel and at least one display driver chip, wherein the display driver chip integrates the above-mentioned smear compensation circuit of the present invention.

(3) Furthermore, the present invention also provides an information processing device, characterized in that it contains at least one display device of the present invention as described above. In a feasible embodiment, the information processing device is an electronic device selected from the group consisting of a head-mounted display device, a smart TV, a smart phone, a smart watch, a tablet computer, an all-in-one computer, a laptop computer, a car entertainment device, a digital camera, and a video door phone.

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment. Any partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by people familiar with the art do not deviate from the scope of the patent rights of this case.

In summary, this case shows that its purpose, means and effects are very different from the known technology, and it is the first invention that is practical and indeed meets the patent requirements for invention. We sincerely request the review committee to examine this carefully and grant a patent as soon as possible to benefit the society. This is our utmost prayer.

1a:OLED display

11a: OLED panel

12a: Display driver chip

2a: Overdrive compensation circuit

21a: Frame Buffer

22a: Compensation Unit

23a: Data Synthesis Unit

1: Display device

11: OLED panel

12: Display driver chip

2: Smear compensation circuit

21: First Buffer

22: First Compensation Unit

23: Mobile Detection Unit

24: Second Buffer

25: Second Compensation Unit

251:Multiplexer

252: Adder

253:Multiplier

26:Select unit

27: Data synthesis unit

FIG. 1 is a block diagram of a known OLED display; FIG. 2 is a circuit block diagram of the overdrive compensation circuit shown in FIG. 1; FIG. 3 is a second circuit block diagram of the overdrive compensation circuit shown in FIG. 1; FIG. 4 is a block diagram of a display device including a smear compensation circuit of the present invention; FIG. 5 is a circuit block diagram of a smear compensation circuit of the present invention; and FIG. 6 is a circuit structure diagram of the second compensation unit shown in FIG. 5.

2: Smear compensation circuit

21: First Cache

22: First compensation unit

23: Mobile detection unit

24: Second Cache

25: Second compensation unit

26: Select unit

27: Data synthesis unit

Claims (11)

A smear compensation circuit is used to be integrated in a display driver chip, and includes: a cache unit, configured to cache a j-1 frame display data, and also configured to cache a historical compensation data and a historical frame sequence number corresponding to the historical compensation data; a first compensation unit, configured to receive a j-1 frame display data as an input display data, and read the j-1 frame display data from the cache unit, and then according to the j-1 frame display data and the j-1 frame display data to generate a first drag compensation data; a motion detection unit, coupled to the j-1 frame display data, and configured to read the j-1 frame display data from the cache unit, and after performing an image motion detection operation on the j-1 frame display data and the j-1 frame display data, determine whether the display image corresponding to the j-1 frame display data moves relative to the display image corresponding to the j-1 frame display data, and then generate an image motion detection operation. an indication signal; a second compensation unit coupled to the buffer unit, the first compensation unit and the motion detection unit, and configured to combine the historical compensation data and an attenuation parameter into a second smear compensation data when the historical frame number is less than N; wherein j and N are both positive integers; a selection unit coupled to the second compensation unit, the first compensation unit and the motion detection unit, and configured to determine, according to the image motion indication signal, whether the first compensation unit will be used to compensate the image; The first smear compensation data generated by the selection unit is output, or the second smear compensation data generated by the second compensation unit is output; and a data synthesis unit is coupled to the selection unit and the j-th frame display data, and is configured to synthesize the first smear compensation data output by the selection unit and the j-th frame display data into an output display data, or synthesize the second smear compensation data output by the selection unit and the j-th frame display data into the output display data. The smear compensation circuit as described in claim 1, wherein the buffer unit includes: a first buffer configured to buffer the j-1th frame display data and coupled to the first compensation unit and the motion detection unit; and a second buffer configured to buffer the historical compensation data and the historical frame sequence number and coupled to the second compensation unit. The smear compensation circuit as described in claim 2, wherein the second compensation unit includes: a multiplexer configured to determine whether to output the first smear compensation data generated by the first compensation unit as a current compensation data or to directly output the historical compensation data read from the second buffer as a current compensation data according to the image motion indication signal. The current compensation data; an adder configured to add 1 to the historical frame number read from the second buffer to obtain a current frame number; and a multiplier configured to perform a multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data. The drag compensation circuit as described in claim 3, wherein the second compensation unit is configured to perform the following functions: based on the image motion indication signal, using the first drag compensation data generated by the first compensation unit as the current compensation data, and then buffering the current compensation data in the second buffer to become the updated historical compensation data. Compensation data, and initialize the historical frame number stored in the second buffer to 0; read the historical frame number and the historical compensation data from the second buffer according to the image motion indication signal; When the historical frame number is not less than N, the historical frame number and the historical compensation data cached in the second buffer are initialized to 0; read the historical frame number and the historical compensation data from the second buffer according to the image motion indication signal; When the historical frame number is not less than N, The historical frame number is initialized to 0 at the same time; when the historical frame number is less than N, the historical frame number is increased by 1 to obtain the updated current frame number; an attenuation parameter corresponding to the current frame number is determined, and then the historical compensation data read from the second buffer is multiplied by the attenuation parameter to generate The second smear compensation data; and using the read historical compensation data as the updated current compensation data, then buffering the current compensation data in the second buffer as the updated historical compensation data, and at the same time, buffering the current frame number in the second buffer as the updated historical frame number. The smear compensation circuit as described in claim 4, wherein the first buffer is a frame buffer and the second buffer is a data buffer. A display device includes a display panel and at least one display driver chip, wherein the display driver chip integrates a smear compensation circuit, and the smear compensation circuit includes: a cache unit configured to cache a j-1th frame of display data, and further configured to cache a historical compensation data and a historical frame sequence number corresponding to the historical compensation data; a first compensation unit configured to receive a j-1th frame of display data as an input display data, and to receive a j-1th frame of display data from the cache unit; The j-1 frame display data is read out, and then a first smear compensation data is generated according to the j-1 frame display data and the j-1 frame display data; a motion detection unit is coupled to the j-1 frame display data and is configured to read the j-1 frame display data from the cache unit, and after performing an image motion detection operation on the j-1 frame display data and the j-1 frame display data, determine whether the display image corresponding to the j-1 frame display data is relative to the display image corresponding to the j-1 frame display data. The display image according to the data moves, and then generates an image movement indication signal; a second compensation unit is coupled to the buffer unit, the first compensation unit and the movement detection unit, and is configured to combine the historical compensation data and an attenuation parameter into a second drag compensation data when the historical frame number is less than N; wherein j and N are both positive integers; a selection unit is coupled to the second compensation unit, the first compensation unit and the movement detection unit, and is configured to select a second drag compensation data according to the image movement indication signal. Decide to output the first smear compensation data generated by the first compensation unit, or decide to output the second smear compensation data generated by the second compensation unit; and a data synthesis unit, coupled to the selection unit and the j-th frame display data, and configured to synthesize the first smear compensation data output by the selection unit and the j-th frame display data into an output display data, or synthesize the second smear compensation data output by the selection unit and the j-th frame display data into the output display data. The display device as described in claim 6, wherein the buffer unit comprises: a first buffer configured to buffer the j-1th frame display data and coupled to the first compensation unit and the motion detection unit; and a second buffer configured to buffer the historical compensation data and the historical frame sequence number and coupled to the second compensation unit. The display device as described in claim 7, wherein the second compensation unit includes: a multiplexer configured to determine whether to output the first smear compensation data generated by the first compensation unit as a current compensation data or to directly output the historical compensation data read from the second buffer as the current compensation data according to the image motion indication signal; an adder configured to add 1 to the historical frame number read from the second buffer to obtain a current frame number; and a multiplier configured to perform a multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the second smear compensation data. The display device as claimed in claim 8, wherein the second compensation unit is configured to perform the following functions: based on the image motion indication signal, using the first smear compensation data generated by the first compensation unit as the current compensation data, and then buffering the current compensation data in the second buffer to become the updated historical compensation data. data, and at the same time, initialize the historical frame sequence number cached in the second buffer to 0; read the historical frame sequence number and the historical compensation data from the second buffer according to the image motion indication signal; when the historical frame sequence number is not less than N, the historical frame sequence number and the historical compensation data cached in the second buffer are initialized to 0; Initializing the historical frame number to 0 when the historical frame number is less than N; when the historical frame number is less than N, adding 1 to the historical frame number to obtain the updated current frame number; determining an attenuation parameter corresponding to the current frame number, and then performing the multiplication operation on the historical compensation data read from the second buffer and the attenuation parameter to generate the attenuation parameter. The second drag compensation data; and the read historical compensation data as the updated current compensation data, then the current compensation data is cached in the second buffer as the updated historical compensation data, and at the same time, the current frame number is cached in the second buffer as the updated historical frame number. A display device as described in claim 9, wherein the first buffer is a frame buffer and the second buffer is a data buffer. An information processing device, characterized in that it contains at least one display device as described in any one of claim 6 to claim 10.

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