CN116312394A - Method and system for adjusting EPD display gray scale - Google Patents
Method and system for adjusting EPD display gray scale Download PDFInfo
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- CN116312394A CN116312394A CN202211737724.5A CN202211737724A CN116312394A CN 116312394 A CN116312394 A CN 116312394A CN 202211737724 A CN202211737724 A CN 202211737724A CN 116312394 A CN116312394 A CN 116312394A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001652 electrophoretic deposition Methods 0.000 description 23
- 229920001345 ε-poly-D-lysine Polymers 0.000 description 23
- 238000010586 diagram Methods 0.000 description 6
- 241001270131 Agaricus moelleri Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
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- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
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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
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Nonlinear Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- Electrochemistry (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a method and a system for adjusting the display gray level of an EPD (electronic display device), which relate to the technical field of electronic paper module display, and comprise the following steps of S1: the duty ratio of gate and source is adjusted through a preset control flow; s2: in the power-on state, acquiring parameter state data, transmitting the parameter state data, and conducting a circuit when gate is at a high level; s3: in the power-on state, the links of duty ratio adjustment gate and oe are acquired, and when each wave form with one length is completed, the duty ratio re-acquires parameter state data once, and then execution is completed once until the wave form is ended and enters a stop state, and the next turn of EPD is waited for starting. The method can enable the display gray level of the EPD to reach high gray level.
Description
Technical Field
The invention relates to the technical field of electronic paper module display, in particular to a method and a system for adjusting EPD display gray scale.
Background
The gray scale displayed in EPD display is typically below 16 gray scales, and the black and white screen specifications are typically 2 gray scales, 4 gray scales or 16 gray scales, mainly because the on time of gate is too long, i.e. the time of CKV high level is too long. Also, the refresh rate is only 200k, which is not fast. In addition, the high level time of the CKV cannot be too short in the test process, and if the high level time is too short, the picture can be displayed unevenly.
Disclosure of Invention
The problem solved by the present invention is how to achieve high gray scale for the display of EPDs.
In order to solve the above problems, the present invention provides a method for adjusting EPD display gray scale, comprising the steps of:
s1: the duty ratio of gate and source is adjusted through a preset control flow;
s2: in the power-on state, acquiring parameter state data, transmitting the parameter state data, and conducting a circuit when gate is at a high level;
s3: in the power-on state, the links of duty ratio adjustment gate and oe are acquired, and when each wave form with one length is completed, the duty ratio re-acquires parameter state data once, and then execution is completed once until the wave form is ended and enters a stop state, and the next turn of EPD is waited for starting.
In the above method, in the control mode of the duty ratio adjustment gate, the links of adjusting the oe duty ratio in the source are added, so that when one length of wave form is completed, the duty cycle needs to be reacquired once and then executed once until the waveform ends in a stopped state waiting for the next turn of EPD to be activated.
The parameter status data in step S2 includes a duty cycle and a gate rate.
Further, the preset control flow is to control the high level time and the duty ratio of oe by adjusting the duty ratio of gate.
Further, the method further comprises the steps of:
s4: and outputting the data in the stopped state in the step S3 to a waveform display area for display.
A system for adjusting EPD display gray scale, comprising:
and an adjusting module: the duty ratio of gate and oe is adjusted through a preset control flow;
a first acquisition module: the circuit is used for acquiring parameter state data in a power-on state, transmitting the parameter state data, and conducting the circuit when the gate is at a high level;
and a second acquisition module: and the link for acquiring the duty ratio adjustment gate and oe in the power-on state is used for acquiring the parameter state data once again by the duty ratio when each wave form with one length is completed, and then completing one execution until the wave form is ended and enters a stop state, and waiting for the starting of the next round of EPD.
Further, the parameter status data includes a duty cycle and a gate rate.
Further, the preset control flow is to control the high level time and the duty ratio of oe by adjusting the duty ratio of gate.
Further, the method further comprises the following steps:
and an output module: and the data which is used for entering the stop state in the second acquisition module is output to a wave form display area for display.
The technical scheme adopted by the invention has the following beneficial effects:
the invention adopts the duty ratio adjustment of gate and the oe duty ratio adjustment in source to complete the display gray of EPD to reach high gray. The gate is started in such a manner that when a rising edge is detected, the on-current is in the high level period of gate, the line is on when the gate is high, and no current flows when the gate is low. Similarly, the switch is turned on when oe is high, and turned off when oe is low. Therefore, the control of the high level time and the duty ratio of oe can be completed by adjusting the duty ratio of gate in one gate period, and the control time can obtain smaller opening time.
Drawings
FIG. 1 is a flowchart of a method for adjusting the gray scale of an EPD display according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for adjusting the gray scale of an EPD display according to a first embodiment of the present invention;
FIG. 3 is a waveform diagram showing a display effect in a gate-only duty cycle state according to a first embodiment of the present invention;
FIG. 4 is a waveform diagram of a display effect in a duty ratio adjusting state of gate and source in a method for adjusting an EPD display gray scale according to an embodiment of the present invention;
fig. 5 is a simplified diagram of a preset control flow in a method for adjusting EPD display gray scale according to an embodiment of the present invention;
FIG. 6 is a first block diagram of a system for adjusting EPD gray scale according to a second embodiment of the present invention;
fig. 7 is a second system configuration diagram for adjusting EPD display gray scale according to the second embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
The embodiment provides a method for adjusting the gray scale of EPD display, as shown in fig. 1 and 2, the method includes the steps of:
s1: the duty ratio of gate and source is adjusted through a preset control flow;
s2: in the power-on state, acquiring parameter state data, transmitting the parameter state data, and conducting a circuit when gate is at a high level;
s3: in the power-on state, the links of duty ratio adjustment gate and oe are acquired, and when each wave form with one length is completed, the duty ratio re-acquires parameter state data once, and then execution is completed once until the wave form is ended and enters a stop state, and the next turn of EPD is waited for starting.
Referring to fig. 5, the preset control flow adopted by the duty cycle adjustment gate is from a power-on state, a start state, a parameter obtaining state duty cycle, a parameter obtaining state gate rate, and a data sending state to a stop state. In the control mode of the duty ratio adjustment gate, the links of acquiring the duty ratio of the gate and the source are added, so that the duty ratio needs to be acquired again when one length of the wave form is completed, and then the wave form is executed once until the wave form is ended and enters a stop state, and the next round of EPD is waited for starting. Wherein, (1) indicates that one waveform length is completed, the acquisition duty cycle is returned, the gate rate is acquired, and data is sent. (2) Indicating that the full waveform length is complete.
Referring to fig. 3, in the case of only the duty ratio of gate, oe is a waveform of the display effect that is always 1, and the duty ratio is adjusted to correspond to the waveform that actually turns on the oe and the pixel.
Referring to the waveform diagram of the high gray scale one length of wave form display effect shown in fig. 4, the duty ratio of gate is variable oe and has a duty ratio, so that it can be satisfied that the high level duty ratio of gate is not very low to complete the conduction. oe is also satisfied for a high level time long enough. But the actual on-time of the individual pixels is a relatively small target.
Referring to fig. 2, the parameter status data in step S2 includes a duty cycle and a gate rate.
The preset control flow is to control the high level time and the duty ratio of oe by adjusting the duty ratio of gate.
Wherein, still include the step:
s4: and outputting the data in the stopped state in the step S3 to a waveform display area for display.
The image data of the front end is processed into a gray-scale image and then stored in ddr 3. When the drive starts to run, the brightness value is read out. And searching for a proper waveform according to the read brightness value to complete lighting.
The method adopts the duty ratio adjustment of gate and the oe duty ratio adjustment in source to complete the display gray level of the EPD to reach high gray level. The gate is started in such a manner that when a rising edge is detected, the on-current is in the high level period of gate, the line is on when the gate is high, and no current flows when the gate is low. Similarly, the switch is turned on when oe is high, and turned off when oe is low. Therefore, the control of the high level time and the duty ratio of oe can be completed by adjusting the duty ratio of gate in one gate period, and the control time can obtain smaller opening time.
Example two
The present embodiment provides a system for adjusting EPD display gray scale, as shown in fig. 6 and 7, including:
and an adjusting module: the duty ratio of gate and oe is adjusted through a preset control flow;
a first acquisition module: the circuit is used for acquiring parameter state data in a power-on state, transmitting the parameter state data, and conducting the circuit when the gate is at a high level;
and a second acquisition module: and the link for acquiring the duty ratio adjustment gate and oe in the power-on state is used for acquiring the parameter state data once again by the duty ratio when each wave form with one length is completed, and then completing one execution until the wave form is ended and enters a stop state, and waiting for the starting of the next round of EPD.
Wherein the parameter status data includes a duty cycle and a gate rate.
The preset control flow is to control the high level time and the duty ratio of oe by adjusting the duty ratio of gate.
Referring to fig. 7, further comprising:
and an output module: and the data for entering the stop state in the second acquisition module is output to the waveform display area for display.
The system adopts the duty ratio adjustment of gate and the oe duty ratio adjustment in source to complete the display gray level of EPD to reach high gray level.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (8)
1. A method of adjusting an EPD display gray scale comprising the steps of:
s1: the duty ratio of gate and source is adjusted through a preset control flow;
s2: in the power-on state, acquiring parameter state data, transmitting the parameter state data, and conducting a circuit when gate is at a high level;
s3: in the power-on state, the links of duty ratio adjustment gate and oe are acquired, and when each wave form with one length is completed, the duty ratio re-acquires parameter state data once, and then execution is completed once until the wave form is ended and enters a stop state, and the next turn of EPD is waited for starting.
2. The method of adjusting EPD display gray scale of claim 1, wherein the parameter status data in step S2 includes a duty cycle and a gate rate.
3. The method of adjusting EPD display gray scale of claim 1, wherein the preset control flow is to complete the control of the high level time and the duty cycle of oe by adjusting the duty cycle of gate.
4. The method of adjusting EPD display gray scale of claim 1, further comprising the step of:
s4: and outputting the data in the stopped state in the step S3 to a waveform display area for display.
5. A system for adjusting the gray scale of an EPD display, comprising:
and an adjusting module: the duty ratio of gate and oe is adjusted through a preset control flow;
a first acquisition module: the circuit is used for acquiring parameter state data in a power-on state, transmitting the parameter state data, and conducting the circuit when the gate is at a high level;
and a second acquisition module: and the link for acquiring the duty ratio adjustment gate and oe in the power-on state is used for acquiring the parameter state data once again by the duty ratio when each wave form with one length is completed, and then completing one execution until the wave form is ended and enters a stop state, and waiting for the starting of the next round of EPD.
6. The system for adjusting EPD display gray scale of claim 5, wherein the parameter status data comprises a duty cycle and a gate rate.
7. The system of adjusting EPD display gray scale of claim 5, wherein the preset control flow is to complete the control of the high level time and the duty cycle of oe by adjusting the duty cycle of gate.
8. The system for adjusting EPD display gray scale of claim 5, further comprising:
and an output module: and the data which is used for entering the stop state in the second acquisition module is output to a wave form display area for display.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211737724.5A CN116312394A (en) | 2022-12-30 | 2022-12-30 | Method and system for adjusting EPD display gray scale |
| PCT/CN2023/138099 WO2024140158A1 (en) | 2022-12-30 | 2023-12-12 | Method and system for adjusting display grayscale of epd |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211737724.5A CN116312394A (en) | 2022-12-30 | 2022-12-30 | Method and system for adjusting EPD display gray scale |
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| CN116312394A true CN116312394A (en) | 2023-06-23 |
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| CN202211737724.5A Pending CN116312394A (en) | 2022-12-30 | 2022-12-30 | Method and system for adjusting EPD display gray scale |
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| WO (1) | WO2024140158A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140158A1 (en) * | 2022-12-30 | 2024-07-04 | 江西兴泰科技股份有限公司 | Method and system for adjusting display grayscale of epd |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103021347B (en) * | 2012-12-25 | 2014-11-26 | 福州瑞芯微电子有限公司 | Display control method and display control device for switching grayscale modes of EPD (electrophoretic display) screen |
| CN104978934B (en) * | 2015-06-24 | 2018-03-09 | 深圳市国华光电科技有限公司 | The flicker reduction method and electrophoretic display device (EPD) of electrophoretic display device (EPD) image switching |
| CN105118443B (en) * | 2015-06-25 | 2017-10-13 | 华南师范大学 | A kind of electro phoretic display device driving method and electro phoretic display device |
| US10818253B2 (en) * | 2015-08-31 | 2020-10-27 | Lg Display Co., Ltd. | Display device and method of driving the same |
| CN115424576B (en) * | 2022-10-31 | 2023-04-11 | 杭州视芯科技股份有限公司 | LED display system and display control method thereof |
| CN116312394A (en) * | 2022-12-30 | 2023-06-23 | 江西兴泰科技股份有限公司 | Method and system for adjusting EPD display gray scale |
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- 2022-12-30 CN CN202211737724.5A patent/CN116312394A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024140158A1 (en) * | 2022-12-30 | 2024-07-04 | 江西兴泰科技股份有限公司 | Method and system for adjusting display grayscale of epd |
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| WO2024140158A1 (en) | 2024-07-04 |
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