CN113936611A - Electronic paper display device and driving method of electronic paper display panel - Google Patents
Electronic paper display device and driving method of electronic paper display panel Download PDFInfo
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- CN113936611A CN113936611A CN202010666747.6A CN202010666747A CN113936611A CN 113936611 A CN113936611 A CN 113936611A CN 202010666747 A CN202010666747 A CN 202010666747A CN 113936611 A CN113936611 A CN 113936611A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
Abstract
The invention provides an electronic paper display device which comprises an electronic paper display panel and a driver circuit. The electronic paper display panel is used for displaying one or more line segments. The one or more segments include a current display segment and a target display segment. The driver circuit is coupled to the electronic paper display panel. The driver circuit is used for driving the electronic paper display panel to display the one or more line segments. According to the current display line segment, the driver circuit drives the display area to display the first color in advance during one frame period. At least a portion of the target display line segment is located in the display area. According to the target display line segment, during the next frame, the driver circuit drives the part of the display area except the target display line segment to display the second color, and drives the part of the display area except the target display line segment to display the first color. In addition, a driving method of the electronic paper display panel is also provided.
Description
Technical Field
The present invention relates to a display device and a driving method of a display panel, and more particularly, to an electronic paper display device and a driving method of an electronic paper display panel.
Background
Electronic paper displays (electronic paper displays) use a large number of microcapsules (microcapsules), i.e., electronic inks, that display electronic content on a plastic film sheet as an optical component. The clear solution in each microcapsule contains a plurality of positively charged white particles and a plurality of negatively charged black particles. When a positive or negative electric field is applied, the corresponding particles will move to the top of the microcapsule, so that the user can see the particles and the display sheet will show a white or black display result. With the development of electronic display technology, the characteristics of electronic paper displays, such as high brightness, low power consumption, and flexibility, have led to electronic paper displays being used in a wide variety of display applications.
However, when the electronic paper display is driven to display a line segment, according to the current method for displaying a line segment, the electronic paper display must connect the accurate (exact) point with the previous point of presence after receiving the exact point, so as to complete the display of the line segment. However, this approach may cause the electronic paper display to react too slowly to provide a good user experience.
Disclosure of Invention
The invention provides electronic paper display equipment and a driving method of an electronic paper display panel, which can save driving time, enable the electronic paper display equipment to react faster and provide good user experience.
The electronic paper display device of the present invention includes an electronic paper display panel and a driver circuit. The electronic paper display panel is used for displaying one or more line segments. The one or more segments include a current display segment and a target display segment. The driver circuit is coupled to the electronic paper display panel. The driver circuit is used for driving the electronic paper display panel to display the one or more line segments. According to the current display segment, the driver circuit drives the display area to display the first color in advance during one frame period (frame period). At least a portion of the target display line segment is located in the display area. According to the target display line segment, during the next frame, the driver circuit drives the part of the display area except the target display line segment to display the second color, and drives the part of the display area except the target display line segment to display the first color.
The driving method of the electronic paper display panel is used for driving the electronic paper display panel to display the current display line segment and the target display line segment. The driving method includes: according to the current display line segment, during one frame, driving a display area in advance to display a first color, wherein at least one part of a target display line segment is positioned in the display area; and according to the target display line segment, during the next frame, driving the part of the display area except the target display line segment to display the second color, and driving the part of the display area except the target display line segment to display the first color.
Based on the above, in the embodiment of the invention, the electronic paper display device and the driving method of the electronic paper display panel pre-drive the display area according to the current display line segment, so that the driving time can be saved, the electronic paper display device can respond faster, and good user experience can be provided.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 shows a schematic view of an electronic paper display device according to an embodiment of the present invention;
FIGS. 2 and 3 are schematic diagrams respectively illustrating the electronic paper display device of the embodiment of FIG. 1 displaying line segments during different frames;
FIG. 4 is a schematic diagram illustrating the geometric parameters of a sector area according to an embodiment of the present invention;
fig. 5 shows a schematic view of an electronic paper display device of another embodiment of the present invention;
FIG. 6 is a schematic diagram of a sector pattern stored by the memory circuit of the embodiment of FIG. 5;
FIG. 7 is a schematic diagram of a driving signal according to an embodiment of the invention;
fig. 8 is a flowchart illustrating a method for driving an electronic paper display panel according to an embodiment of the invention.
Description of the reference numerals
100. 500 electronic paper display device
110 driver circuit
120 electronic paper display panel
200 line segment
220 target display line segment
210 current display line segment
300 display area
300_1, 300_2, 300_3, 300_4, 300_5, 300_6, 300_7, 300_8 sector pattern
530 memory circuit
A is the vertex
P1, P2 endpoint
R is radius
S1, S2, S3 drive signals
S100, S110 method step
T1, T2 frame period
V1, V3 Direction vector
V2 center vector
Angle of center of alpha
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1 is a schematic diagram of an electronic paper display device according to an embodiment of the present invention. Referring to fig. 1, the electronic paper display apparatus 100 of the present embodiment includes a driver circuit 110 and an electronic paper display panel 120. The e-paper display panel 120 is used for displaying one or more line segments 200. The driver circuit 110 is coupled to the e-paper display panel 120. The driver circuit 110 is used for driving the electronic paper display panel 120 to display the line segment 200.
In the embodiment, the electronic paper display device 100 is, for example, a black-and-white electronic paper display device, so the line segment 200 is a black or darker gray line, and the background of the line segment 200 is a white or lighter gray image, which is not limited to this. In one embodiment, the electronic paper display device 100 may also be a color electronic paper display device, so that the color of the lines and their background can be changed according to the actual display requirement.
Fig. 2 and 3 respectively show schematic diagrams of the electronic paper display device of the embodiment of fig. 1 displaying line segments during different frames. Referring to fig. 1 to 3, fig. 2 shows that the electronic paper display device displays a segment 200 including a current display segment 210 during a first frame, and fig. 3 shows that the electronic paper display device displays a segment 200 including a target display segment 220 during a second frame. In this embodiment, the second frame period is the next frame period of the first frame period.
In the present embodiment, the driver circuit 110 drives the display area 300 to display black (first color) or a darker gray scale (first gray scale) in advance during the first frame period according to the current display line segment 210. Then, the driver circuit 110 drives the portion of the display area 300 other than the target display line segment 220 to display white (second color) or a brighter gray level (second gray level) as the background color during the second frame period according to the target display line segment 220. At the same time, the driver circuit 110 drives the portion of the target display line segment 200 in the display area 300 to display black as the line segment color.
In the present embodiment, a portion of the target display line segment 200 is located in the display area 300 that is previously driven, but the present invention is not limited thereto. In one embodiment, if the pre-driven display area 300 is set to be larger, all of the target display segments 200 may be located in the pre-driven display area 300.
In the present embodiment, the display area 300 that is driven in advance is a sector area, and the vertex a of the sector area is the end point P1 of the current display line segment 210. The driver circuit 110 determines the central vector V2 of the sector area according to the direction vector V1 of the currently displayed segment 210. That is, the driver circuit 110 drives the fan-shaped display area 300 in advance to display black according to the direction vector V1 of the current display line segment 210. After the driver circuit 110 receives the display data of the target display segment 220 and determines the end point P2 of the target display segment 220, the driver circuit 110 determines a direction vector V3 of the target display segment 220 according to the end point P1 of the current display segment 210 and the end point P2 of the target display segment 220, as shown in fig. 3. In the present embodiment, the end point of the current display line segment 210 is the same as the start point of the target display line segment 220, and is the point P1.
In the embodiment, the direction vector V3 of the target display segment 220 is different from the direction vector V1 of the current display segment 210, but the invention is not limited thereto. In one embodiment, the direction vector V3 of the target display segment 220 may be the same as the direction vector V1 of the currently displayed segment 210, i.e., the directions of the direction vectors V1, V3 and the center vector V2 of the sector area are the same.
Fig. 4 is a schematic diagram illustrating geometric parameters of a sector area according to an embodiment of the present invention. Referring to fig. 4, the geometric parameters of the present embodiment include a central vector V2, a central angle α, a radius R, and a vertex a. The central angle α and the radius R may be predetermined according to actual design requirements, for example, set by a user. The vertex a of the fan-shaped area 300 is the end point P1 of the currently displayed line segment 210. The center vector V2 of the sector area 300 refers to a direction vector located at an angle α/2 within the sector area 300. The center vector V2 of the sector area 300 is determined by the direction vector V1 of the currently displayed segment 210. Accordingly, the fan-shaped region 300 is a region having the point a as the apex, the radius R as the radial length, and the center vector V2 as the center, and is opened at a half central angle in each of the clockwise and counterclockwise directions.
In the present embodiment, the driver circuit 110 calculates the size of the sector area 300 from the center vector V2, the central angle α, and the radius R of the sector area 300, and drives the sector area 300 to display black in advance during the first frame in accordance therewith. Next, during a second frame, the driver circuit 110 drives the portion 310 of the display area 300 other than the target display line segment 220 to display white as a background color according to the target display line segment 220, as shown in fig. 3.
In the embodiments of fig. 2 to 4, the display area 300 is a sector area, but the invention is not limited thereto. In one embodiment, the display area may be a circular area centered at the end point P1 of the current display line segment 210, and the radius of the circular area may be predetermined according to actual design requirements, for example, set by a user.
In the embodiments of fig. 2 to 4, the size and shape of the pre-driven region are calculated by the driver circuit 110 according to the geometric parameters of the display region 300, for example, but the invention is not limited thereto. In an embodiment, the size and shape of the display area 300 may also be a reference pattern pre-stored in the electronic paper display device 100.
Fig. 5 is a schematic view of an electronic paper display device according to another embodiment of the present invention. FIG. 6 is a schematic diagram of a sector pattern stored in the memory circuit of the embodiment of FIG. 5. Referring to fig. 5 and 6, the electronic paper display apparatus 500 of the present embodiment is similar to the electronic paper display apparatus 100 of the embodiment of fig. 1, and the main difference between the two is that, for example, the electronic paper display apparatus 500 further includes a memory circuit 530. The memory circuit 530 may be configured within or outside the driver circuit 110. The memory circuit 530 is, for example, a register or a memory element.
In the present embodiment, the memory circuit 530 is used to store a plurality of fan-shaped patterns 300_1, 300_2, 300_3, 300_4, 300_5, 300_6, 300_7, 300_8 with center vectors V2 having different directions, as shown in fig. 6. The driver circuit 110 selects one from the fan-shaped patterns 300_1 to 300_8 of fig. 6 as the display area 300 to be driven in advance, based on the direction vector V1 of the current display line segment 210. One way of selection is, for example, to select a fan-shaped pattern having a center vector V2 closest to the direction vector V1 as the display area 300 to be driven in advance. The number of fan-shaped patterns and the direction of each center vector are not intended to limit the present invention.
In addition, the electronic paper display device 500 according to the embodiment of the present invention can obtain sufficient teaching, suggestion and implementation descriptions from the description of the embodiments of fig. 1 to 4.
Fig. 7 is a schematic diagram of a driving signal according to an embodiment of the invention. Referring to fig. 1 and fig. 7, the driver circuit 110 of the present embodiment drives the electronic paper display panel 120 to display the line segment 200 according to the driving signals S1, S2, and S3, for example. In the first frame period T1, the driver circuit 110 drives the display area 300 in advance to display black according to the driving signal S1. Next, in the second frame period T2, the driver circuit 110 drives the portion of the display area 300 other than the target display line segment 220 to display white according to the driving signal S2. Meanwhile, in the second frame period T2, the driver circuit 110 drives the part of the target display line segment 200 in the display area 300 to display black according to the driving signal S3.
That is, in the present embodiment, since the portion of the target display line segment 200 in the display area 300 has been driven to black in advance in the first frame period T1, the level of the driving signal S3 for driving the portion of the target display line segment 200 in the display area 300 to display black in the second frame period T2 does not need to be pulled high in the first frame period T1. The driving signal S3 saves one frame period in terms of driving time to drive the display area 300 to display the target display line segment 200.
Fig. 8 is a flowchart illustrating a method for driving an electronic paper display panel according to an embodiment of the invention. Referring to fig. 1 and fig. 8, the driving method of the electronic paper display panel of the present embodiment is at least applicable to the electronic paper display apparatus 100 of fig. 1, but the present invention is not limited thereto. Taking the electronic paper display device 100 of fig. 1 as an example, in step S100, the driver circuit 110 drives the display area 300 to display the first color in advance according to the current display line segment 210 in the first frame period T1. Next, in step S110, the driver circuit 110 drives the portion of the display area 300 other than the target display line segment 220 to display the second color and drives the portion of the display area 300 of the target display line segment 220 to display the first color according to the target display line segment 220 in the second frame period T2.
In addition, the driving method of the electronic paper display panel according to the embodiment of the invention can be obtained from the description of the embodiments of fig. 1 to 7 to obtain sufficient teaching, suggestion and implementation description.
In summary, in the embodiments of the invention, the driver circuit drives a part of the display area of the electronic paper display panel in advance according to the current display segment. In the next frame period, the driver circuit drives the pre-driven area to display the target display line segment, so that the time for driving the electronic paper display panel to display the line segment can be saved, the electronic paper display equipment can react faster, and good user experience can be provided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (20)
1. An electronic paper display device, comprising:
the electronic paper display panel is used for displaying one or more line segments, wherein the one or more line segments comprise a current display line segment and a target display line segment; and
a driver circuit coupled to the e-paper display panel for driving the e-paper display panel to display the one or more segments,
wherein the driver circuit pre-drives a display area to display a first color during a frame according to the current display line segment, wherein at least a portion of the target display line segment is located in the display area; and
according to the target display line segment, during the next frame, the driver circuit drives the part of the display area except the target display line segment to display the second color, and drives the part of the display area except the target display line segment to display the first color.
2. The electronic paper display apparatus of claim 1, wherein a starting point of the target display segment is an ending point of the current display segment, and the driver circuit determines a direction vector of the target display segment according to the ending point of the current display segment and the ending point of the target display segment.
3. The electronic paper display device of claim 2, the direction vector of the target display segment being the same as the direction vector of the current display segment.
4. The electronic paper display device of claim 2, wherein a direction vector of the target display segment is different from a direction vector of the current display segment.
5. The electronic paper display device according to claim 1, wherein the display area that is driven in advance is a sector area, and the driver circuit decides a center vector of the sector area according to a direction vector of the present display line segment.
6. The electronic paper display device of claim 5, wherein a vertex of the fan-shaped area is an end point of the currently displayed line segment.
7. The electronic paper display apparatus of claim 5, wherein a central angle and a radius of the sector area are predetermined.
8. The electronic paper display device of claim 5, further comprising:
and a memory circuit for storing a plurality of sector patterns having center vectors of different directions, wherein the driver circuit selects one of the sector patterns as the display area to be driven in advance according to the direction vector of the current display line segment.
9. The electronic paper display device of claim 1, wherein all of the target display line segments are located within the display area.
10. The electronic paper display device according to claim 1, wherein the display area that is driven in advance is a circular area, a center of the circular area is an end point of the present display line segment, and a radius of the circular area is predetermined.
11. A driving method of an electronic paper display panel is used for driving the electronic paper display panel to display a current display line segment and a target display line segment, and is characterized by comprising the following steps:
according to the current display line segment, a display area is driven in advance to display a first color during one frame period, wherein at least one part of the target display line segment is located in the display area; and
and driving the part of the display area except the target display line segment to display a second color and driving the part of the display area except the target display line segment to display the first color during the next frame according to the target display line segment.
12. The driving method of an electronic paper display panel according to claim 11, wherein a start point of the target display line segment is an end point of the present display line segment, and the driving method further comprises:
and determining the direction vector of the target display line segment according to the end point of the current display line segment and the end point of the target display line segment.
13. The driving method of an electronic paper display panel according to claim 12, wherein a direction vector of the target display line segment is the same as a direction vector of the current display line segment.
14. The driving method of an electronic paper display panel according to claim 12, wherein a direction vector of the target display segment is different from a direction vector of the current display segment.
15. The driving method of the electronic paper display panel according to claim 11, wherein the display area that is driven in advance is a sector area, and the driving method further comprises:
and determining the central vector of the sector area according to the direction vector of the current display line segment.
16. The driving method of an electronic paper display panel according to claim 15, wherein a vertex of the sector area is an end point of the current display line segment.
17. The method of driving an e-paper display panel according to claim 15, wherein the central angle and radius of the sector area are predetermined.
18. The driving method of the electronic paper display panel according to claim 15, further comprising:
selecting one from among a plurality of sector patterns having center vectors of different directions as the display area to be driven in advance, based on the direction vector of the current display line segment, wherein the sector pattern is stored in a memory circuit.
19. The driving method of the electronic paper display panel according to claim 11, wherein all of the target display line segments are located in the display area.
20. The method of driving an electronic paper display panel according to claim 11, wherein the display area that is driven in advance is a circular area, a center of the circular area is an end point of the current display line segment, and a radius of the circular area is predetermined.
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