A method and system for adjusting high grayscale of electronic paper with gate width

Abstract

The present invention provides a method and system for adjusting high grayscale of electronic paper with gate bit width, which relates to the field of electronic paper module display technology. The method includes steps S1: dynamically adjusting the gate rate by presetting a first control flow, until the waveform ends and then enters a stop state, waiting for the next round of EPD startup; S2: entering a start state after powering on through the preset first control flow, obtaining parameters of the gate rate and sending data to the data output, and then entering a stop state; S3: adjusting the duty cycle of the gate by presetting a second control flow, until the waveform ends and then enters a stop state, waiting for the next round of EPD startup. The method can adjust the duty cycle of the gate in a gate cycle to complete the control of the high level time, so that the gate can be controlled more accurately, so that the display grayscale of the EPD reaches a high grayscale.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic paper module display, and in particular to a method and system for adjusting high grayscale of electronic paper with a gate bit width. Background Art

[0002] The grayscale displayed in the EPD display is usually below 16 grayscales. The specifications of black and white screens usually show 2 grayscales, 4 grayscales or 16 grayscales. The main reason is that the gate opening time is too long, that is, the CKV high level time is too long. From the refresh rate, it is only 200k, which is not fast. In addition, during the test, the CKV high level time cannot be too short. If it is too short, the picture will be uneven.

[0003] The display area has 32 waveform lengths, half of which is the zeroing of the previous frame image, and half is the display of the current image. 16 grayscales require 16 zeroings and 16 displays. After 16 waveforms, the display is already at the maximum grayscale. That is, 1 / 200k*16=8ms will display the maximum grayscale. Increasing the length of the display area cannot increase the grayscale. The gate frequency is also limited. Therefore, no matter what, the waveform display area display part is refreshed at most 16 times. This is why the current maximum grayscale level of EPD display is only 16 levels. Therefore, affected by these constraints, it is difficult for EPD to display high grayscale. Summary of the invention

[0004] The problem solved by the present invention is how to make the gray scale displayed by the EPD reach a high gray scale.

[0005] In order to solve the above problems, the present invention provides a method for adjusting high grayscale of electronic paper with gate width, comprising the steps of:

[0006] S1: Dynamically adjust the gate rate by presetting the first control flow until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0007] S2: After the preset first control process is powered on, it enters the start state, obtains the parameters of the gate rate and sends data to the data output, and then enters the stop state;

[0008] S3: The duty cycle of the gate is adjusted by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0009] S4: After the preset second control process is powered on, it enters the start state, obtains the parameters of the duty cycle and the gate rate and sends data to the data output, and then enters the stop state;

[0010] S5: Output the data that entered the stop state in step S2 and step S4 to the waveform display area for display.

[0011] In the above method, the preset first control flow used for dynamically adjusting the gate rate is from the power-on state, the start state, the parameter state gate rate acquisition, the data sending state to the stop state. In the data sending state, after each waveform data of a length is sent, it will return to the parameter state gate rate acquisition to obtain the required gate rate, and then execute the data sending state until the waveform ends and enters the stop state, waiting for the next round of EPD to start. The preset second control flow used by the duty cycle adjustment gate is from the power-on state, the start state, the parameter state duty cycle acquisition, the parameter state gate rate acquisition, the data sending state to the stop state. In the control method of the duty cycle adjustment gate, there is an additional step of obtaining the duty cycle, so every time a waveform of a length is completed, the duty cycle needs to be re-acquired once, and then completed once, until the waveform ends and enters the stop state, waiting for the next round of EPD to start.

[0012] Furthermore, the step S2 comprises:

[0013] S21: In the data sending state of the preset first control flow, after each waveform data of a length is sent, the state of obtaining parameters will be returned to obtain the required gate rate;

[0014] S22: After obtaining the parameters of the gate rate, the data sending state is executed until the waveform ends and then the stop state is entered.

[0015] Furthermore, after a waveform of a length is completed in the data sending state of the preset first control flow, a gate rate is acquired once, and data is directly sent.

[0016] Furthermore, the step S4 comprises:

[0017] S41: In the data sending state of the preset second control flow, after each waveform data of a length is sent, it will return to the parameter acquisition state to obtain the required duty cycle and gate rate;

[0018] S42: After obtaining the duty cycle and gate rate parameters, the data sending state is executed until the waveform ends and then the stop state is entered.

[0019] Furthermore, after a waveform of a length is completed in the data sending state of the preset second control flow, a new gate rate is obtained from the previous state, and a new duty cycle is re-obtained, and then execution is completed again.

[0020] A system for adjusting high grayscale of electronic paper with gate width, comprising:

[0021] The first adjustment unit is used to dynamically adjust the gate rate through the preset first control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0022] The first acquisition unit is used to enter the start state after power-on through the preset first control process, obtain the parameters of the gate rate and send data to the data output, and then enter the stop state;

[0023] The second regulating unit is used to adjust the duty cycle of the gate by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0024] The second acquisition unit is used to enter the start state after power-on according to the preset second control process, obtain the parameters of the duty cycle and the gate rate and send the data to the data output, and then enter the stop state;

[0025] Display unit: used to output the data in the first acquisition unit and the second acquisition unit that have entered the stop state to the waveform display area for display.

[0026] Furthermore, the first acquiring unit includes:

[0027] The rate acquisition subunit is used to return to the parameter acquisition state to obtain the required gate rate after each waveform data of a length is sent in the data sending state of the preset first control flow;

[0028] The first execution subunit is used to execute the sending data state after obtaining the parameters of the gate rate, and then enter the stop state until the waveform ends.

[0029] Furthermore, after a waveform of a length is completed in the data sending state of the preset first control flow, a gate rate is acquired once, and data is directly sent.

[0030] Furthermore, the second acquiring unit includes:

[0031] Duty cycle and rate acquisition subunit: used to return to the parameter acquisition state to obtain the required duty cycle and gate rate after each waveform data of a length is sent in the sending data state of the preset second control flow;

[0032] The second execution subunit is used to execute the sending data state after obtaining the parameters of the duty cycle and gate rate, and then enter the stop state until the waveform ends.

[0033] Furthermore, after a waveform of a length is completed in the data sending state of the preset second control flow, a new gate rate is obtained from the previous state, and a new duty cycle is re-obtained, and then execution is completed again.

[0034] The present invention adopts the above technical solution to achieve the following beneficial effects:

[0035] The present invention uses the gate duty cycle adjustment and gate frequency change to make the displayed gray scale reach 32 gray scales. The gate starts by detecting the rising edge and relying on the high level of the gate to conduct the current. When the gate is at a high level, the line is turned on, and when the gate is at a low level, no current flows. Therefore, in a gate cycle, the gate duty cycle is adjusted to complete the control of the high level time, so that the gate can be controlled more accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The method flow of adjusting the high grayscale of electronic paper with gate width provided in the first embodiment of the present invention Figure 1 ;

[0037] Figure 2 The method flow of adjusting the high grayscale of electronic paper with gate width provided in the first embodiment of the present invention Figure 2 ;

[0038] Figure 3 A waveform diagram of a waveform display effect of a low grayscale length in the method for adjusting high grayscale of electronic paper with gate bit width provided in the first embodiment of the present invention;

[0039] Figure 4 A waveform diagram of a waveform display effect of a high grayscale length in the method for adjusting high grayscale of electronic paper with gate bit width provided in the first embodiment of the present invention;

[0040] Figure 5 A simplified diagram of a preset first control flow in the method for adjusting high grayscale of electronic paper with gate bit width provided in the first embodiment of the present invention;

[0041] Figure 6A simplified diagram of a preset second control flow in the method for adjusting the high grayscale of an electronic paper with a gate bit width provided in the first embodiment of the present invention;

[0042] Figure 7 A waveform diagram showing the effect of dynamically adjusting the gate and the duty cycle of the gate in the method for adjusting the high grayscale of electronic paper with gate width provided in the first embodiment of the present invention;

[0043] Figure 8 The system structure of electronic paper high grayscale adjustment with gate width provided in the second embodiment of the present invention Figure 1 ;

[0044] Fig. 9 The system structure of electronic paper high grayscale adjustment with gate width provided in the second embodiment of the present invention Figure 2 . DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0046] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0047] Embodiment 1

[0048] This embodiment provides a method for adjusting the high grayscale of electronic paper with a gate width, such as Figure 1 and Figure 2 As shown, the method comprises the steps of:

[0049] S1: Dynamically adjust the gate rate by presetting the first control flow until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0050] S2: After the preset first control process is powered on, it enters the start state, obtains the parameters of the gate rate and sends data to the data output, and then enters the stop state;

[0051] S3: The duty cycle of the gate is adjusted by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0052] S4: After the preset second control process is powered on, it enters the start state, obtains the parameters of the duty cycle and the gate rate and sends data to the data output, and then enters the stop state;

[0053] S5: Output the data that entered the stop state in step S2 and step S4 to the waveform display area for display.

[0054] See also Figure 5 As shown, the preset first control flow adopted for dynamically adjusting the gate rate is from power-on state, start state, obtain parameter state gate rate, send data state to stop state. In the send data state, after each waveform data of a length is sent, it will return to obtain parameter state gate rate to obtain the required gate rate, and then execute the send data state until the waveform ends and enter the stop state, waiting for the next round of EPD (electrophoretic display) to start. Among them, ① means that a waveform length is completed, return to obtain gate rate, and send data. ② means that all waveform lengths are completed.

[0055] See also Figure 6 As shown, the preset second control process adopted by the duty cycle adjustment gate is from power-on state, start state, obtain parameter state duty cycle, obtain parameter state gate rate, send data state to stop state. In the control method of the duty cycle adjustment gate, there is an additional step of obtaining the duty cycle. Therefore, every time a waveform of a certain length is completed, the duty cycle needs to be re-acquired once, and then completed once, until the waveform ends and enters the stop state, waiting for the next round of EPD to start. Among them, ① indicates that a waveform length is completed, and returns to obtain the duty cycle, obtain the gate rate, and send data. ② indicates that all waveform lengths are completed.

[0056] See also Figure 3 The waveform of the low grayscale waveform is shown in the waveform diagram. The gate duty cycle is as large as possible, leaving only a small gap. The EPD display grayscale controllable range is small. In the case of 64 grayscale, the dynamic adjustment of the gate grayscale 20 and grayscale 23 display effects are the same.

[0057] See also Figure 4 The waveform of the high grayscale waveform with a length is shown. The duty cycle of the gate can be changed, so the grayscale of the EPD display can be adjusted in a wide range. In the case of 64 grayscales, the grayscale 20 and grayscale 23 of the duty cycle gate have different display effects. The length of the waveform is the same. However, in the first waveform, the duty cycle of grayscale 20 is smaller than that of grayscale 23.

[0058] See also Figure 2 , wherein step S2 comprises:

[0059] S21: In the data sending state of the preset first control flow, after each waveform data of a length is sent, the state of obtaining parameters will be returned to obtain the required gate rate;

[0060] S22: After obtaining the parameters of the gate rate, the data sending state is executed until the waveform ends and then the stop state is entered.

[0061] Among them, after a waveform of a length is completed in the data sending state of the preset first control flow, a gate rate is obtained once, and data is directly sent.

[0062] Wherein, step S4 comprises:

[0063] S41: In the data sending state of the preset second control flow, after each waveform data of a length is sent, it will return to the parameter acquisition state to obtain the required duty cycle and gate rate;

[0064] S42: After obtaining the duty cycle and gate rate parameters, the data sending state is executed until the waveform ends and then the stop state is entered.

[0065] Among them, after completing a waveform of a length in the data sending state of the preset second control flow, a new gate rate is obtained in the previous state, and a new duty cycle is re-obtained, and then the execution is completed again.

[0066] See also Figure 7 , the effect diagram after dynamic adjustment of gate and duty cycle adjustment of gate. The period of duty cycle gate and dynamic gate is the same, but the duty cycle is different. The image data of the front end is processed into a 32 grayscale image and then stored in DDR3. When the driver starts running, the brightness value is read out. According to the read brightness value, the corresponding waveform is found to complete the transmission of different periods and duty cycles of the gate.

[0067] This method uses the gate duty cycle adjustment and gate frequency change to make the displayed grayscale reach 32 grayscales. The gate starts by detecting the rising edge and relying on the high level of the gate to conduct the current. When the gate is at a high level, the line is turned on, and when the gate is at a low level, no current flows. Therefore, in a gate cycle, the gate duty cycle is adjusted to complete the control of the high level time, so that the gate can be controlled more accurately.

[0068] Embodiment 2

[0069] This embodiment provides a system for adjusting the high grayscale of electronic paper with a gate width, such as Figure 8 and Fig. 9 As shown, the system includes:

[0070] The first adjustment unit is used to dynamically adjust the gate rate through the preset first control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0071] The first acquisition unit is used to enter the start state after power-on through the preset first control process, obtain the parameters of the gate rate and send data to the data output, and then enter the stop state;

[0072] The second regulating unit is used to adjust the duty cycle of the gate by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD;

[0073] The second acquisition unit is used to enter the start state after power-on according to the preset second control process, obtain the parameters of the duty cycle and the gate rate and send the data to the data output, and then enter the stop state;

[0074] Display unit: used to output the data in the first acquisition unit and the second acquisition unit that have entered the stop state to the waveform display area for display.

[0075] See also Fig. 9 , wherein the first acquisition unit includes:

[0076] The rate acquisition subunit is used to return to the parameter acquisition state to obtain the required gate rate after each waveform data of a length is sent in the data sending state of the preset first control flow;

[0077] The first execution subunit is used to execute the sending data state after obtaining the parameters of the gate rate, and then enter the stop state until the waveform ends.

[0078] Among them, after a waveform of a length is completed in the data sending state of the preset first control flow, a gate rate is obtained once, and data is directly sent.

[0079] Wherein, the second acquisition unit includes:

[0080] Duty cycle and rate acquisition subunit: used to return to the parameter acquisition state to obtain the required duty cycle and gate rate after each waveform data of a length is sent in the sending data state of the preset second control flow;

[0081] The second execution subunit is used to execute the sending data state after obtaining the parameters of the duty cycle and gate rate, and then enter the stop state until the waveform ends.

[0082] Among them, after completing a waveform of a length in the data sending state of the preset second control flow, a new gate rate is obtained in the previous state, and a new duty cycle is re-obtained, and then the execution is completed again.

[0083] Based on the preset second control flow in the second adjustment unit and the preset first control flow in the first adjustment unit, the system adjusts the duty cycle of the gate and the frequency of the gate to make the displayed grayscale reach 32 grayscales. The gate starts by detecting the rising edge and relying on the high level of the gate to conduct the current. When the gate is at a high level, the line is turned on, and when the gate is at a low level, no current flows. Therefore, in a gate cycle, the duty cycle of the gate is adjusted to complete the control of the high level time, so that the gate can be controlled more accurately.

[0084] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for adjusting high grayscale of electronic paper with gate width, characterized in that: Includes steps: S1: Dynamically adjust the gate rate by presetting the first control flow until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD; S2: After the preset first control process is powered on, it enters the start state, obtains the parameters of the gate rate and sends data to the data output, and then enters the stop state; S3: The duty cycle of the gate is adjusted by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD; S4: After the preset second control process is powered on, it enters the start state, obtains the parameters of the duty cycle and the gate rate and sends data to the data output, and then enters the stop state; S5: Output the data that entered the stop state in step S2 and step S4 to the waveform display area for display.

2. The method for adjusting the high grayscale of electronic paper with gate width according to claim 1, characterized in that: The step S2 comprises: S21: In the data sending state of the preset first control flow, after each waveform data of a length is sent, the state of obtaining parameters will be returned to obtain the required gate rate; S22: After obtaining the parameters of the gate rate, the data sending state is executed until the waveform ends and then the stop state is entered.

3. The method for adjusting the high grayscale of electronic paper with gate width according to claim 2, characterized in that: After a waveform of a certain length is completed in the data transmission state of the preset first control flow, a gate rate is obtained once and data is directly transmitted.

4. The method for adjusting the high grayscale of electronic paper with gate width according to claim 1, characterized in that: The step S4 comprises: S41: In the data sending state of the preset second control flow, after each waveform data of a length is sent, it will return to the parameter acquisition state to obtain the required duty cycle and gate rate; S42: After obtaining the duty cycle and gate rate parameters, the data sending state is executed until the waveform ends and then the stop state is entered.

5. The method for adjusting the high grayscale of electronic paper with gate width according to claim 4, characterized in that: After completing a waveform of a length in the data sending state of the preset second control flow, a new gate rate is obtained in the previous state, and a new duty cycle is re-obtained to complete another execution.

6. A system for adjusting high grayscale of electronic paper with gate width, characterized in that: include: The first adjustment unit is used to dynamically adjust the gate rate through the preset first control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD; The first acquisition unit is used to enter the start state after power-on through the preset first control process, obtain the parameters of the gate rate and send data to the data output, and then enter the stop state; The second regulating unit is used to adjust the duty cycle of the gate by presetting the second control process until the waveform ends and then enters the stop state, waiting for the start of the next round of EPD; The second acquisition unit is used to enter the start state after power-on according to the preset second control process, obtain the parameters of the duty cycle and the gate rate and send the data to the data output, and then enter the stop state; Display unit: used to output the data in the first acquisition unit and the second acquisition unit that have entered the stop state to the waveform display area for display.

7. The system for adjusting the high grayscale of electronic paper with gate width according to claim 6, characterized in that: The first acquiring unit includes: The rate acquisition subunit is used to return to the parameter acquisition state to obtain the required gate rate after each waveform data of a length is sent in the data sending state of the preset first control flow; The first execution subunit is used to execute the sending data state after obtaining the parameters of the gate rate, and then enter the stop state until the waveform ends.

8. The system for adjusting the high grayscale of electronic paper with gate width according to claim 7, characterized in that: After a waveform of a certain length is completed in the data transmission state of the preset first control flow, a gate rate is obtained once and data is directly transmitted.

9. The system for adjusting the high grayscale of electronic paper with gate width according to claim 6, characterized in that: The second acquiring unit includes: Duty cycle and rate acquisition subunit: used to return to the parameter acquisition state to obtain the required duty cycle and gate rate after each waveform data of a length is sent in the sending data state of the preset second control flow; The second execution subunit is used to execute the sending data state after obtaining the parameters of the duty cycle and gate rate, and then enter the stop state until the waveform ends.

10. The system for adjusting the high grayscale of electronic paper with gate width according to claim 9, characterized in that: After completing a waveform of a length in the data sending state of the preset second control flow, a new gate rate is obtained in the previous state, and a new duty cycle is re-obtained to complete another execution.

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