Electronic paper display apparatus and updating method therefor

Abstract

The present disclosure provides an electronic paper display apparatus and an updating method therefor. The electronic paper display apparatus comprises a liquid crystal display panel and a controller. The controller is configured for confirming whether an updating direction of a partial updating area is staggered with a historical updating direction of a historical updating area, so as to obtain a direction determination result. When the direction determination result is yes, the controller drives the liquid crystal display panel to perform full-screen updating. Thus, good display quality is provided.

Description

Electronic paper display device and updating method thereof TECHNICAL FIELD

[0001] The present disclosure relates to a display device and an updating method thereof, and particularly to an electronic paper display device and an updating method thereof. BACKGROUND

[0002] Electronic paper display devices with storage have gradually been put into practical use. However, the liquid crystal of the electronic paper display device will produce different liquid crystal bistable ratios at different temperatures or different driving cumulative times, resulting in a great change in reflectivity characteristics, even if the same data is used for picture updating.

[0003] That is, in the case of repeated partial picture updating, there is a problem of excessive brightness difference due to different reflectivity, which leads to poor display quality of the electronic paper device.

[0004] Therefore, there is a lack of an electronic paper display device and an updating method thereof that can avoid excessive brightness difference and affect display quality in the market, and relevant manufacturers are seeking solutions.

[0005] SUMMARY

[0006] The purpose of the present disclosure is to provide an electronic paper display device and an updating method thereof, which can confirm the association between the update direction of the current partial update area and the history update area, and perform full picture updating, thereby avoiding the problem of excessive brightness difference affecting display quality.

[0007] According to an embodiment of the structure of the present disclosure, an electronic paper display device is provided, comprising a liquid crystal display panel and a controller. The controller is electrically connected to the liquid crystal display panel and comprises a display control module and an update direction judgment module. The display control module is used to drive the liquid crystal display panel to display and update. The update direction judgment module is electrically connected to the display control module and is used to obtain a partial update area from the display control module, and to confirm whether the update direction of the partial update area is staggered with the history update direction of a history update area to obtain a direction judgment result. When the direction judgment result is yes, the display control module drives the liquid crystal display panel to perform full picture updating.

[0008] Other embodiments of the foregoing embodiment are as follows: the partial update area and the history update area each comprise at least one rectangle, and the update direction judgment module confirms the update direction and the history update direction according to two coordinates of the at least one rectangle of the partial update area and two coordinates of the at least one rectangle of the history update area, respectively.

[0009] Other implementations of the aforementioned implementations include the following: The electronic paper display device further includes a screen ratio determination module. The screen ratio determination module is electrically connected to the display control module and the update direction determination module, and is used to calculate a full screen ratio value of the partial update region and the historical update region.

[0010] Other implementations of the aforementioned implementations include the following: When the direction determination result in the update direction determination module is no, the screen ratio determination module calculates the full screen ratio value.

[0011] Other implementations of the aforementioned implementations include the following: The screen ratio determination module is further used to determine whether the full screen ratio value is greater than a predetermined value to obtain a ratio determination result. When the ratio determination result is yes, the display control module drives the liquid crystal display panel to perform full screen update. When the ratio determination result is no, the display control module drives the liquid crystal display panel to perform partial screen update according to the partial update region.

[0012] Other implementations of the aforementioned implementations include the following: The electronic paper display device further includes a management module. The management module is electrically connected to the update direction determination module and the screen ratio determination module, and is used to manage the partial update region and the historical update region.

[0013] Other implementations of the aforementioned implementations include the following: When the direction determination result in the update direction determination module is yes, the management module clears the historical update region.

[0014] Other implementations of the aforementioned implementations include the following: When the ratio determination result in the screen ratio determination module is no, the management module stores the partial update region as the historical update region.

[0015] Other implementations of the aforementioned implementations include the following: The predetermined value is between 0.4 and 0.6.

[0016] Other implementations of the aforementioned implementations include the following: The electronic paper display device further includes a memory. The memory is electrically connected to the controller, and is used to store the historical update region.

[0017] An embodiment of a method according to the present disclosure provides an update method of an electronic paper display device, including: obtaining a partial update region by an update direction determination module of a controller. Confirming whether an update direction of the partial update region is staggered with a historical update direction of a historical update region by the update direction determination module to obtain a direction determination result. Driving a liquid crystal display panel to display and update by a display control module of the controller according to the direction determination result. When the direction determination result is yes, the display control module drives the liquid crystal display panel to perform full screen update.

[0018] Other implementations of the aforementioned implementations include that the partial update region and the history update region each include at least one rectangle, and the update direction determination module determines the update direction and the history update direction based on two coordinates of the at least one rectangle of the partial update region and two coordinates of the at least one rectangle of the history update region.

[0019] Other implementations of the aforementioned implementations include that the update method of the electronic paper display device further includes, when the direction determination result is no, calculating, by a screen ratio determination module, a full screen ratio value of the partial update region and the history update region.

[0020] Other implementations of the aforementioned implementations include that the update method of the electronic paper display device further includes determining, by the screen ratio determination module, whether the full screen ratio value is greater than a predetermined value to obtain a ratio determination result. When the ratio determination result is yes, driving, by the display control module, the liquid crystal display panel to perform full screen update. When the ratio determination result is no, driving, by the display control module, the liquid crystal display panel to perform partial update based on the partial update region.

[0021] Other implementations of the aforementioned implementations include that the update method of the electronic paper display device further includes, after the liquid crystal display panel performs full screen update, clearing, by a management module, the history update region.

[0022] Other implementations of the aforementioned implementations include that the update method of the electronic paper display device further includes, when the ratio determination result is no, storing, by the management module, the partial update region as the history update region.

[0023] Other implementations of the aforementioned implementations include that the predetermined value is between 0.4 and 0.6.

[0024] Another implementation of the method aspect according to the disclosure provides an update method of an electronic paper display device, including: calculating, by a screen ratio determination module of a controller, a full screen ratio value of a partial update region and a history update region. Determining, by the screen ratio determination module, whether the full screen ratio value is greater than a predetermined value to obtain a ratio determination result. Driving, by a display control module of the controller, a liquid crystal display panel to display and update based on the ratio determination result. When the ratio determination result is yes, driving, by the display control module, the liquid crystal display panel to perform full screen update.

[0025] Other implementations of the aforementioned implementations include that, when the ratio determination result is no, determining, by an update direction determination module, whether an update direction of the partial update region and a history update direction of the history update region are staggered to obtain a direction determination result.

[0026] Other implementations of the foregoing embodiments are as follows: the full-screen proportion value is an area of a union of the partial update region and the historical update region divided by a screen area of the liquid crystal display panel. BRIEF DESCRIPTION OF DRAWINGS

[0027] FIG. 1 is a block diagram illustrating an electronic paper display device of a first embodiment of the present disclosure;

[0028] FIG. 2 is a diagram illustrating a partial update region and a historical update region in the first embodiment of FIG. 1;

[0029] FIG. 3 is a flowchart illustrating an update method of an electronic paper display device of a second embodiment of the present disclosure;

[0030] FIG. 4 is a diagram illustrating that a full-screen update is performed in accordance with FIG. 3, with an update direction and a historical update direction interleaved;

[0031] FIG. 5 is a diagram illustrating that a full-screen update is performed in accordance with FIG. 3, with a full-screen proportion value being greater than a predetermined value;

[0032] FIG. 6 is a diagram illustrating that a partial-screen update is performed in accordance with FIG. 3, with the full-screen proportion value being less than the predetermined value; and

[0033] FIG. 7 is another diagram illustrating that a partial-screen update is performed in accordance with FIG. 3, with the full-screen proportion value being less than the predetermined value.

[0034] In the drawings, the following reference numerals are used:

[0035] 100: electronic paper display device

[0036] 110: liquid crystal display panel

[0037] 111, 111a, 111b, 111c, 111d, 111e, 111f, 111g, 111h, 111i, 111j, 111k: screen

[0038] 120: controller

[0039] 121: display control module

[0040] 122: update direction determination module

[0041] 123: screen proportion determination module

[0042] 124: management module

[0043] 130: memory

[0044] 200: update method of an electronic paper display device

[0045] A: partial update region

[0046] D: update direction

[0047] HA: history update area

[0048] HD: history update direction

[0049] S01, S02, S03, S04, S05, S06, S07, S08: step

[0050] x1, y1: start point

[0051] x2, y2: end point DETAILED DESCRIPTION

[0052] Embodiments of the present disclosure will be described hereinafter with reference to the accompanying drawings. For the purpose of explanation, numerous specific details will be set forth in the following description. It should be appreciated that these specific details are not intended to limit the present disclosure, as such many modifications can be made. That is, in some embodiments of the present disclosure, well-known structures and elements are not described in detail or are shown in block diagram form. Further, for the purpose of clarity, the description is divided into several sections, such as Section A, Section B, Section C, and Section D. However, it should be appreciated that the present disclosure is not limited to the order of the sections.

[0053] Further, when an element (or unit or module etc.) is "connected" to another element, it can mean that the element is directly connected to the other element or indirectly connected to the other element, i.e., there are other elements between the element and the other element. When it is explicitly stated that an element is "directly connected" to another element, it means that there is no other element between the element and the other element. The terms first, second, third, etc. are used to describe different elements and do not limit the elements themselves. Thus, a first element can also be referred to as a second element. Further, the combination of elements / units / circuits in this document is not a combination that is generally known, conventional or well-known in the art, and whether the combination of elements / units / circuits is easily completed by those skilled in the art cannot be determined by whether the elements / units / circuits themselves are well-known.

[0054] Referring to FIG. 1 and FIG. 2, FIG. 1 is a block diagram illustrating an electronic paper display device of a first embodiment of the present disclosure; and FIG. 2 is a diagram illustrating a partial update area and a history update area in the first embodiment of FIG. 1. The electronic paper display device 100 includes a liquid crystal display panel 110, a controller 120, and a memory 130. The controller 120 is electrically connected to the liquid crystal display panel 110 and the memory 130. The liquid crystal display panel 110 has a screen 111 to display an image (as shown in FIG. 2). The controller 120 is used to control the liquid crystal display panel 110 to display and update the full screen or the partial screen. The memory 130 is used to store a history update area HA. In the first embodiment, the liquid crystal display panel 110 can be a cholesteric liquid crystal (ChLCD) display; the controller 120 can be a processor, a microprocessor, a central processing unit (CPU), a computer, a mobile device processor, a cloud processor, or other electronic computing processor; and the memory 130 can be a random access memory (RAM), a video RAM (VRAM), or other type of dynamic storage device capable of storing information and instructions for execution by the controller 120, but the present disclosure is not limited thereto.

[0055] The controller 120 includes a display control module 121, an update direction judgment module 122, a screen proportion judgment module 123, and a management module 124. The display control module 121 is electrically connected to the update direction judgment module 122, the screen proportion judgment module 123, and the management module 124. The update direction judgment module 122 is electrically connected to the screen proportion judgment module 123 and the management module 124. The screen proportion judgment module 123 is electrically connected to the management module 124. The display control module 121 is used to drive the liquid crystal display panel 110 to display and update. The update direction judgment module 122 is used to obtain a partial update area A from the display control module 121 and confirm whether an update direction D of the partial update area A intersects with a history update direction HD of the history update area HA to obtain a direction judgment result.

[0056] In the first embodiment, the partial update area A is a block that the current display control module 121 intends to drive the liquid crystal display panel 110 to perform partial update in the picture 111, and the history update area HA is a block that the display control module 121 has driven the liquid crystal display panel 110 to perform partial update after performing full picture update. The partial update area A and the history update area HA each include at least one rectangle (as shown in FIG. 2), and one side length of each rectangle is equal to one side length of the picture 111 of the liquid crystal display panel 110. The update direction judgment module 122 confirms the update direction D and the history update direction HD according to two coordinates of the rectangles corresponding to the partial update area A and the history update area HA, respectively. For example, as shown in FIG. 2, because one side length of the partial update area A is equal to the long side of the picture 111, the update direction judgment module 122 defines the coordinates of the partial update area A at the start point x1 and the end point x2 in the short side of the picture 111, and confirms the update direction D as the X-axis direction according to the coordinate change of the start point x1 and the end point x2. Because one side length of the history update area HA is equal to the short side of the picture 111, the update direction judgment module 122 defines the coordinates of the history update area HA at the start point y1 and the end point y2 in the long side of the picture 111, and confirms the history update direction HD as the Y-axis direction according to the coordinate change of the start point y1 and the end point y2.

[0057] In this way, by confirming whether the update direction D of the partial update area A and the history update direction HD of the history update area HA are staggered, it can be immediately judged whether the partial update area A and the history update area HA overlap, so as to perform full picture update in time and avoid the problem of low display quality.

[0058] The picture proportion judgment module 123 is used to calculate a full picture proportion value of the partial update area A and the history update area HA, and judge whether the full picture proportion value is greater than a predetermined value to obtain a proportion judgment result. The management module 124 is used to manage the partial update area A and the history update area HA according to the proportion judgment result. It should be particularly noted that, in the case where the partial update area A and the history update area HA do not overlap, the full picture proportion value is the sum of the partial update area A and the history update area HA divided by the area of the picture 111 of the liquid crystal display panel 110; and in the case where the partial update area A and the history update area HA overlap, the full picture proportion value is the union area of the partial update area A and the history update area HA divided by the area of the picture 111 of the liquid crystal display panel 110. It should be particularly noted that the detailed features of the picture proportion judgment module 123 will be described in conjunction with FIG. 2, FIG. 5, FIG. 6 and FIG. 7 below.

[0059] Referring to FIG. 1, FIG. 2, and FIG. 3, wherein FIG. 3 is a flow diagram illustrating an updating method of an electronic paper display device according to a second embodiment of the present disclosure. The electronic paper display device 100 is configured to implement the updating method of an electronic paper display device 200. It is to be noted that the updating method of an electronic paper display device 200 of the present disclosure is not limited to be implemented by the electronic paper display device 100 of the present disclosure. The updating method of an electronic paper display device 200 comprises sequentially executed steps S01, S02, and S03. In step S01, the partial update area A is obtained from the display control module 121 by the update direction judgment module 122. In step S02, whether the update direction D of the partial update area A is staggered with a historical update direction HD of a historical update area HA is determined by the update direction judgment module 122 to obtain a direction judgment result. In step S03, the liquid crystal display panel 110 is driven by the display control module 121 to perform full screen update according to the direction judgment result.

[0060] In addition, the updating method of an electronic paper display device 200 can further comprise step S04 executed after step S03. In step S04, the historical update area HA stored in the memory 130 is cleared by the management module 124.

[0061] Referring to FIG. 1, FIG. 3, and FIG. 4, wherein FIG. 4 is a schematic diagram illustrating full screen update performed according to the update direction being staggered with the historical update direction according to FIG. 3. In FIG. 4, a scenario in which the direction judgment result is YES is illustrated. In step S01, the update direction D of the partial update area A is the X-axis direction and the historical update direction HD of the historical update area HA is the Y-axis direction (as shown in the screen 111a). Therefore, in step S02, it is determined that the update direction D is staggered with the historical update direction HD, and the direction judgment result is YES, and step S03 is subsequently executed. In step S03, the liquid crystal display panel 110 is driven by the display control module 121 to perform full screen update (as shown in the screen 111b). In step S04, because full screen update has been performed, the historical update area HA is cleared from the memory 130 by the management module 124. In this way, the problem of obvious brightness difference caused by repeated partial screen update and thus low display quality can be avoided.

[0062] In addition, the updating method 200 of the electronic paper display device can further comprise steps S05, S06 and S07 sequentially performed after step S02, and step S03 can be performed after step S06. When the direction determination result in step S02 is no, step S05 is performed, and the full-screen proportion value of the partial update area A and the historical update area HA is calculated by the screen proportion determination module 123. In step S06, the screen proportion determination module 123 determines whether the full-screen proportion value is greater than a predetermined value to obtain a proportion determination result. In step S07, the display control module 121 drives the liquid crystal display panel 110 to perform partial update according to the partial update area A. In the second embodiment, the predetermined value is between 0.4 and 0.6, and preferably the predetermined value is 0.5.

[0063] Specifically, when the proportion determination result in step S06 is yes, step S03 is performed to drive the liquid crystal display panel 110 to perform full-screen update by the display control module 121; when the proportion determination result is no, step S07 is performed to drive the liquid crystal display panel 110 to perform partial update according to the partial update area A by the display control module 121. It should be particularly pointed out that, in the case that the partial update area A and the historical update area HA do not overlap, the display control module 121 only drives the liquid crystal display panel 110 to perform partial update according to the partial update area A; and in the case that the partial update area A and the historical update area HA overlap, the display control module 121 will drive the liquid crystal display panel 110 to perform partial update according to the union of the partial update area A and the historical update area HA overlapping with it.

[0064] Referring to FIG. 1, FIG. 3, and FIG. 5, wherein FIG. 5 is a schematic diagram illustrating performing full screen update according to the full screen ratio value being greater than the predetermined value in FIG. 3. In FIG. 5, the direction judgment result of the update direction judgment module 122 is no, and the ratio judgment result calculated by the screen ratio judgment module 123 is yes, and the predetermined value is 0.5. In step S01, the update direction judgment module 122 confirms that the update direction D of the partial update region A and the historical update direction HD of the historical update region HA are both in the X-axis direction (as shown in the screen 111c). Therefore, in step S02, it is judged that the update direction D and the historical update direction HD are not staggered, so the direction judgment result is no, and step S05 is performed subsequently. In step S05, the screen ratio judgment module 123 divides the sum of the partial update region A and the historical update region HA by the full screen area of the liquid crystal display panel 110 (as shown in the screen 111d), and obtains the full screen ratio value as 0.6. Therefore, in step S06, the screen ratio judgment module 123 judges that the full screen ratio value is greater than the predetermined value (0.6>0.5), and the ratio judgment result is yes, and step S03 is performed subsequently. In step S03, the display control module 121 drives the liquid crystal display panel 110 to perform full screen update (as shown in the screen 111e). In step S04, because full screen update has been performed, the management module 124 clears the historical update region HA from the memory 130.

[0065] It should be particularly pointed out that the steps S05 and S06 of the update method 200 of the electronic paper display device are not limited to being performed after step S02, but can be performed before step S01 according to needs. That is, the update method 200 of the electronic paper display device can first confirm whether to perform full screen update according to the ratio judgment result by the screen ratio judgment module 123. Then, it is confirmed again whether to perform full screen update according to the direction judgment result by the update direction judgment module 122, which is not limited by the present disclosure.

[0066] The update method 200 of the electronic paper display device can further include step S08 performed after step S07. In step S08, the partial update region A is stored as the historical update region HA by the management module 124.

[0067] Referring to FIG. 1, FIG. 3, and FIG. 6, FIG. 6 is a diagram illustrating performing partial screen update according to the full screen ratio value being less than the predetermined value in FIG. 3. In FIG. 6, the direction judgment result of the update direction judgment module 122 is false, the ratio judgment result calculated by the screen ratio judgment module 123 is false, and the predetermined value is 0.5. The steps S01 and S02 are performed (as shown in the screen 111f) in the same manner as the scenario in FIG. 5, and thus are not described again. In the step S05, the screen ratio judgment module 123 divides the sum of the partial update area A and the historical update area HA by the full screen area of the liquid crystal display panel 110 (as shown in the screen 111g), and obtains the full screen ratio value as 0.33. Therefore, in the step S06, the screen ratio judgment module 123 judges that the full screen ratio value is not greater than the predetermined value (0.33 < 0.5), and the ratio judgment result is false, and then the step S07 is performed. In the step S07, the display control module 121 drives the liquid crystal display panel 110 to perform partial screen update according to the partial update area A. In the step S08, the management module 124 integrates the partial update range (the partial update area A) and the historical update area HA, and stores the integrated result as the historical update area HA (as shown in the screen 111h).

[0068] Referring to FIG. 1, FIG. 3, and FIG. 7, FIG. 7 is another diagram illustrating performing partial screen update according to the full screen ratio value being less than the predetermined value in FIG. 3. In FIG. 7, the direction judgment result of the update direction judgment module 122 is false, the ratio judgment result calculated by the screen ratio judgment module 123 is false, and the predetermined value is 0.5. The scenario in FIG. 7 is different from the scenario in FIG. 6 in that the partial update area A and the historical update area HA in the scenario in FIG. 7 partially overlap. The steps S01 and S02 are performed (as shown in the screen 111i) in the same manner as the scenario in FIG. 5, and thus are not described again. In the step S05, because the partial update area A and the historical update area HA partially overlap, the screen ratio judgment module 123 divides the union range of the partial update area A and the historical update area HA by the full screen area of the liquid crystal display panel 110 (as shown in the screen 111j), and obtains the full screen ratio value as 0.25. Therefore, in the step S06, the screen ratio judgment module 123 judges that the full screen ratio value is not greater than the predetermined value (0.25 < 0.5), and the ratio judgment result is false, and then the step S07 is performed. In the step S07, the display control module 121 drives the liquid crystal display panel 110 to perform partial screen update according to the union range of the partial update area A and the historical update area HA. In the step S08, the management module 124 stores the union range of the partial update area A and the historical update area HA as the historical update area HA (as shown in the screen 111k).

[0069] From the above embodiments, the present disclosure has the following advantages: by confirming the update direction of the partial update area and the historical update area, and further confirming the screen proportion of the partial update area and the historical update area, full screen update is performed in real time, and the problem of low display quality caused by repeated partial screen update can be effectively avoided.

[0070] Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure, and any person skilled in the art can make some changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the appended claims.

Claims

1. An electronic paper display device, characterized in that: Include: a liquid crystal display panel; and A controller electrically connected to the liquid crystal display panel and comprising: a display control module for driving the liquid crystal display panel to display and update; and an update direction determination module electrically connected to the display control module and configured to obtain a portion of the update area from the display control module and determine whether an update direction of the portion of the update area intersects with a historical update direction of a historical update area to obtain a direction determination result; When the direction determination result is yes, the display control module drives the liquid crystal display panel to perform full-screen update.

2. The electronic paper display device according to claim 1, wherein: The partial update area and the historical update area respectively include at least one rectangle. The update direction determination module respectively determines the update direction and the historical update direction according to two coordinates of the at least one rectangle of the partial update area and the at least one rectangle of the historical update area.

3. The electronic paper display device according to claim 1, wherein: Also includes: A screen ratio determination module is electrically connected to the display control module and the update direction determination module, and is used to calculate a full screen ratio value of the partial update area and the historical update area.

4. The electronic paper display device according to claim 3, wherein: When the direction determination result in the update direction determination module is negative, the screen ratio determination module calculates the full screen ratio value.

5. The electronic paper display device according to claim 3, wherein: The screen ratio determination module is further configured to determine whether the full screen ratio is greater than a predetermined value to obtain a ratio determination result; When the proportion determination result is yes, the display control module drives the liquid crystal display panel to perform full screen update; When the proportion determination result is negative, the display control module drives the liquid crystal display panel to perform partial screen update according to the partial update area.

6. The electronic paper display device according to claim 5, wherein: Also includes: A management module is electrically connected to the update direction determination module and the screen ratio determination module, and is used to manage the partial update area and the historical update area.

7. The electronic paper display device according to claim 6, wherein: When the direction determination result in the update direction determination module is yes, the management module clears the historical update area.

8. The electronic paper display device according to claim 6, wherein: When the screen proportion determination module determines that the proportion is negative, the management module stores the partially updated area as the historical update area.

9. The electronic paper display device according to claim 5, wherein: The predetermined value is between 0.4 and 0.

6.

10. The electronic paper display device according to claim 1, wherein: Also includes: A memory is electrically connected to the controller and used for storing the historical update area.

11. A method for updating an electronic paper display device, characterized in that: Include: Obtaining a portion of the update area through an update direction determination module of a controller; Determining, by the update direction determination module, whether an update direction of the partial update area intersects with a historical update direction of a historical update area to obtain a direction determination result; as well as A display control module of the controller drives a liquid crystal display panel to display and update according to the direction determination result; When the direction determination result is yes, the display control module drives the liquid crystal display panel to perform full-screen update.

12. The updating method of the electronic paper display device according to claim 11, wherein: The partial update area and the historical update area respectively include at least one rectangle. The update direction determination module respectively determines the update direction and the historical update direction according to two coordinates of the at least one rectangle of the partial update area and the at least one rectangle of the historical update area.

13. The updating method of the electronic paper display device according to claim 11, wherein: Also includes: When the direction determination result is negative, a full screen ratio of the partial update area and the historical update area is calculated by a screen ratio determination module.

14. The updating method of the electronic paper display device according to claim 13, wherein: Also includes: Determining whether the full screen ratio is greater than a predetermined value by the screen ratio determination module to obtain a ratio determination result; When the result of the proportion determination is yes, the display control module drives the liquid crystal display panel to perform full screen update; When the proportion determination result is negative, the display control module drives the liquid crystal display panel to perform a partial update according to the partial update area.

15. The updating method of the electronic paper display device according to claim 14, wherein: Also includes: After the liquid crystal display panel executes full screen update, the historical update area is cleared through a management module.

16. The updating method of the electronic paper display device according to claim 15, wherein: Also includes: When the proportion determination result is negative, the management module stores the partially updated area as the historical update area.

17. The updating method of the electronic paper display device according to claim 14, wherein: The predetermined value is between 0.4 and 0.

6.

18. A method for updating an electronic paper display device, characterized in that: Include: Calculating a full screen ratio value of a portion of the update area and a historical update area through a screen ratio determination module of a controller; Determining whether the full screen ratio is greater than a predetermined value by the screen ratio determination module to obtain a ratio determination result; and A display control module of the controller drives a liquid crystal display panel to display and update according to the proportion determination result; When the proportion determination result is yes, the display control module drives the liquid crystal display panel to perform full-screen update.

19. The updating method of the electronic paper display device according to claim 18, wherein: When the proportion determination result is negative, an update direction determination module is used to determine whether an update direction of the partial update area intersects with a historical update direction of the historical update area to obtain a direction determination result.

20. The updating method of the electronic paper display device according to claim 18, wherein: The full screen ratio is the combined area of ​​the partial update area and the historical update area divided by the screen area of ​​the liquid crystal display panel.

Images