CN113345380B - Electronic paper display and driving method thereof - Google Patents
Electronic paper display and driving method thereof Download PDFInfo
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- CN113345380B CN113345380B CN202010099645.0A CN202010099645A CN113345380B CN 113345380 B CN113345380 B CN 113345380B CN 202010099645 A CN202010099645 A CN 202010099645A CN 113345380 B CN113345380 B CN 113345380B
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- electronic paper
- paper display
- gray scale
- line segment
- input signal
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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 which comprises an electronic paper display panel, a graphic library and a display controller. The display controller is coupled to the electronic paper display panel. The display controller is used for receiving the line segment input signal, calling the graphic library and then driving the electronic paper display panel to display the line segments by utilizing the signal wave type group. The signal waveform set is generated according to the line segment input signal and the pattern library. The line segment includes at least one gray level. In addition, a driving method of the electronic paper display is also provided.
Description
Technical Field
The present disclosure relates to displays and driving methods thereof, and particularly to an electronic paper display and a driving method thereof.
Background
In the prior art, when drawing a line in a handwriting mode, a static database SWTCON connects each point as a line segment displayed on an electronic paper display by using a X, Y coordinate value acquired from an Android system terminal. The line segment drawn in this way will have only black color on each pixel and no gray scale. When the electronic paper display is displayed, the electronic paper display is driven by using the signal wave mode combination only supporting black and white, so that the line segment finally displayed on the electronic paper display is only black, and the electronic paper display with smaller resolution ratio can be easily seen to have saw-tooth shapes.
Disclosure of Invention
The invention provides an electronic paper display and a driving method thereof, which can drive an electronic paper display panel to display smoother line segments.
The electronic paper display of the invention comprises an electronic paper display panel, a graphic library and a display controller. The display controller is coupled to the electronic paper display panel. The display controller is used for receiving the line segment input signal, calling the graphic library and then driving the electronic paper display panel to display the line segments by utilizing the signal wave type group. The signal waveform set is generated according to the line segment input signal and the pattern library. The line segment includes at least one gray level.
The driving method of the electronic paper display comprises the following steps: receiving a line segment input signal; the pattern library is called according to the line segment input signal to generate a signal wave pattern group. And driving the display line segments of the electronic paper display panel by utilizing the signal wave type group. The line segment includes at least one gray level.
In an embodiment of the invention, the gray scales include a white gray scale, a black gray scale, a first gray scale and a second gray scale.
In an embodiment of the invention, the graphics library is a two-dimensional graphics library.
In an embodiment of the invention, the graphic library is an ski graphic library.
In an embodiment of the invention, the line segment input signal is a handwriting input signal or a pen-writing input signal.
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 is a schematic diagram of an electronic paper display according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electronic paper display of the embodiment of FIG. 1 showing a line segment input signal;
FIG. 3 shows a schematic diagram of pixels of the handwritten line segment of the embodiment of FIG. 2;
fig. 4, 5 and 6 are schematic diagrams illustrating a signal waveform set according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a driving method of an electronic paper display according to an embodiment of the invention.
Description of the reference numerals
100 electronic paper display
110 electronic paper display panel
120 graphic library
130 display controller
200 handwriting line segment
210 pixels
G0, G10, G20, G30 Gray level
S1 line segment input signal
S100, S110, S120
V1, V2, V3, drive signal waveform, signal waveform set
VDPS, VDNS voltage
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 according to an embodiment of the present invention. Fig. 2 is a schematic diagram illustrating an example of the electronic paper display of fig. 1 displaying a stroke input. FIG. 3 shows a schematic diagram of pixels of the handwritten line segment of the embodiment of FIG. 2. Referring to fig. 1 and fig. 2, the electronic paper display 100 of the present embodiment includes an electronic paper display panel 110, a graphic library 120, and a display controller 130. The graphics library 120 is, for example, a graphics library and is stored in a memory storage device. The display controller 130 is coupled to the e-paper display panel 110. The display controller 130 is configured to receive the segment input signal S1, call the graphic library 120 according to the segment input signal S1, and then drive the electronic paper display panel 110 to display the content of the segment input signal S1, i.e. the segment 200, by using the signal waveform set. The signal waveform set is generated by generating the line segment 200 according to the line segment input signal S1 and the pattern library 120. The line segment 200 includes a plurality of gray levels. The line segment 200 may be a handwritten line segment or a pen-written line segment. A line segment input signal, i.e., an input by a user on the electronic paper display panel with a pen, hand, or other tool. In an embodiment of the invention is a pen input signal.
In the present embodiment, the graphic library 120 is, for example, an ski graphic library (two-dimensional graphic library). In fig. 3, the pixels 210 of the line segment 200 may include a white gray scale G0, a black gray scale G30, a first gray scale G10, and a second gray scale G20. One embodiment of the gray scale display can be driven by the schematic diagrams of the signal waveform sets shown in fig. 4 to 6.
Fig. 4, 5 and 6 are schematic diagrams illustrating a signal waveform group according to an embodiment of the present invention. Referring to fig. 4 to 6, the driving signal waveform V1 shown in fig. 4 is, for example, a display state in which the optical state of the particles in the electronic paper display panel 110 is driven from the initial state of white to black. The driving signal waveform V2 shown in fig. 5 is, for example, a display state in which the optical state of the particles in the electronic paper display panel 110 is driven from the initial state of black to white. The driving signal waveform V3 shown in fig. 6 is, for example, a display state in which the optical state of the particles in the electronic paper display panel 110 is driven from the initial state of white to a different gray. In fig. 4 to 6, voltages VDPS and VDNS are high and low levels of the driving signal waveforms V1, V2 and V3, respectively. The driving time of the driving signal waveforms V1 and V2 is 100 ms to 300 ms, which is shorter than the driving time of the driving signal waveform V3 by 500 ms to 1500 ms. In fig. 4 to 6, the time lengths of the driving signal waveforms V1, V2 and V3 and the embodiments thereof are only for illustration, and the invention is not limited thereto.
Therefore, the display controller 130 calls the graphic library 120 according to the segment input signal S1 to control the display driver 130 to generate the signal waveform groups V1, V2 and V3 as shown in fig. 4 to 6. The signal waveform groups V1, V2, and V3 can drive the e-paper display panel 110 to display a line segment 200 including a plurality of gray levels, and the line segment 200 includes a plurality of gray levels, such as G0 to G30. The manner in which the set of signal waveforms is generated and the structure and operation of the display controller and display driver are sufficiently taught, suggested, and described in the prior art.
Fig. 7 is a flowchart illustrating a driving method of an electronic paper display according to an embodiment of the invention. Referring to fig. 1 and fig. 7, the driving method of the present embodiment is at least applicable to the electronic paper display 100 of fig. 1, but the present invention is not limited thereto. Taking the electronic paper display 100 of fig. 1 as an example, in step S100, the display controller 130 receives the line segment input signal S1. In step S110, the display controller 130 calls the graphic library according to the segment input signal S1 to generate the signal waveform groups V1, V2 and V3. In step S120, the display controller 130 drives the electronic paper display panel 110 to display a line segment including a plurality of gray levels by using the signal waveform set. In addition, the driving method of the electronic paper display according to the embodiment of the present invention can be adequately taught, suggested, and implemented in the descriptions of the embodiments of fig. 1 to 6.
To sum up, in the embodiment of the present invention, in order to solve the problem that the original static database SWTCON can only draw black lines, which results in saw-tooth line segments on the electronic paper display with lower resolution, the display controller changes the function originally used for drawing lines in the static database SWTCON into a SKIA graphic library in the android system to generate handwritten line segments with gray scale compensation, and then matches the handwritten line segments with the signal wave pattern groups, so as to draw smoother line segments.
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 (8)
1. An electronic paper display, comprising:
an electronic paper display panel;
a graphics library; and
the display controller is coupled to the e-paper display panel and used for receiving a line segment input signal and calling the graphics library according to the line segment input signal, wherein the graphics library is used for generating a line segment with gray scale compensation, and then a signal wave type group is used for driving the e-paper display panel to display the line segment with gray scale compensation, wherein the signal wave type group is generated according to the line segment input signal and the graphics library, and the line segment with gray scale compensation comprises at least one gray scale, wherein the gray scale comprises a white gray scale, a black gray scale, a first gray scale and a second gray scale.
2. The electronic paper display of claim 1, wherein the graphics library is a two-dimensional graphics library.
3. The electronic paper display of claim 1, wherein the graphics library is a SKIA graphics library.
4. The electronic paper display of claim 1, wherein the line segment input signal is a handwriting input signal or a pen-writing input signal.
5. A driving method of an electronic paper display, comprising:
receiving a line segment input signal;
calling a graphic library according to the line segment input signal to generate a signal wave type group, wherein the graphic library is used for generating line segments containing gray scale compensation; and
and driving the electronic paper display panel to display the line segment containing gray scale compensation by using the signal wave type group, wherein the line segment containing gray scale compensation comprises at least one gray scale, and the gray scale comprises a white gray scale, a black gray scale, a first gray scale and a second gray scale.
6. The driving method of an electronic paper display according to claim 5, wherein the graphic library is an SKIA graphic library.
7. The driving method of an electronic paper display according to claim 5, wherein the graphics library is a two-dimensional graphics library.
8. The driving method of an electronic paper display according to claim 5, wherein the line segment input signal is a handwriting input signal or a pen-writing input signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010099645.0A CN113345380B (en) | 2020-02-18 | 2020-02-18 | Electronic paper display and driving method thereof |
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| CN202010099645.0A CN113345380B (en) | 2020-02-18 | 2020-02-18 | Electronic paper display and driving method thereof |
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| CN113345380A CN113345380A (en) | 2021-09-03 |
| CN113345380B true CN113345380B (en) | 2022-11-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4507936B2 (en) * | 2005-03-24 | 2010-07-21 | エプソンイメージングデバイス株式会社 | Image display device and electronic apparatus |
| US8416197B2 (en) * | 2007-06-15 | 2013-04-09 | Ricoh Co., Ltd | Pen tracking and low latency display updates on electronic paper displays |
| US8203547B2 (en) * | 2007-06-15 | 2012-06-19 | Ricoh Co. Ltd | Video playback on electronic paper displays |
| US8874665B2 (en) * | 2010-12-13 | 2014-10-28 | At&T Mobility Ii Llc | Systems, apparatus and methods for facilitating display and management of information for communication devices |
| TW201234334A (en) * | 2011-02-15 | 2012-08-16 | Novatek Microelectronics Corp | Driving method for bistable display device and driving device thereof |
| US8902204B2 (en) * | 2011-10-27 | 2014-12-02 | Ricoh Co., Ltd. | Bounding box based control method for electronic paper devices |
| WO2013124952A1 (en) * | 2012-02-20 | 2013-08-29 | 富士通フロンテック株式会社 | Display device and display method |
| US10282033B2 (en) * | 2012-06-01 | 2019-05-07 | E Ink Corporation | Methods for updating electro-optic displays when drawing or writing on the display |
| US20160275873A1 (en) * | 2015-03-20 | 2016-09-22 | Microsoft Technology Licensing, Llc | Modifying content for electronic paper display devices |
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