CN116312394A - Method and system for adjusting EPD display gray scale - Google Patents

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

A method and system for adjusting EPD display grayscale

technical field

The present invention relates to the technical field of electronic paper module display, in particular to a method and system for adjusting the gray scale of EPD display.

Background technique

The grayscale displayed in the EPD display is usually below 16 grayscales. The specifications of black and white screens are usually 2 grayscales, 4 grayscales or 16 grayscales. That is, the time of CKV high level is too long. Judging from the refresh rate, it is only 200k, which is not fast. And in the test process, the high level time of CKV can't be too short, if it is too short, the picture will be displayed unevenly.

Contents of the invention

The problem solved by the invention is how to make the display gray scale of EPD reach high gray scale.

In order to solve the above problems, the present invention provides a method for adjusting EPD display grayscale, comprising steps:

S1: Adjust the duty cycle of gate and source through the preset control process;

S2: In the power-on state, obtain the parameter status data and send the parameter status data. When the gate is at a high level, the line is turned on;

S3: In the power-on state, obtain the link of duty ratio adjustment gate and oe. When a waveform of a length is completed, the duty ratio obtains the parameter status data again, and then completes an execution until the waveform ends and enters the stop state. , waiting for the start of the next round of EPD.

In the above method, in the control method of the duty cycle adjustment gate, there is an additional link to adjust the oe duty cycle in the source. Therefore, every time a waveform of a length is completed, the duty cycle needs to be acquired again, and then in Complete an execution until the waveform ends and enters the stop state, waiting for the start of the next round of EPD.

The parameter state data in the step S2 includes a duty cycle and a gate rate.

Further, the preset control process is to control the high level time and the duty cycle of oe by adjusting the duty cycle of gate.

Further, steps are also included:

S4: Outputting the data entering the stop state in step S3 to the waveform display area for display.

A system for adjusting the gray scale displayed by EPD, comprising:

Adjustment module: used to adjust the duty cycle of gate and oe through the preset control process;

The first acquisition module: used to obtain parameter status data in the power-on state, and send the parameter status data. When the gate is at a high level, the line is turned on;

The second acquisition module: it is used to obtain the link of adjusting the gate and oe of the duty cycle in the power-on state. When a waveform of a length is completed, the duty cycle obtains the parameter status data again, and then completes an execution until the waveform After entering the stop state, it waits for the start of the next round of EPD.

Further, the parameter state data includes duty cycle and gate rate.

Further, the preset control process is to control the high level time and the duty cycle of oe by adjusting the duty cycle of gate.

Further, it also includes:

An output module: used to output the data entering the stop state in the second acquisition module to the waveform display area for display.

The present invention adopts above-mentioned technical scheme and comprises following beneficial effect:

The present invention adopts the adjustment of the duty cycle of the gate and the adjustment of the oe duty cycle of the source to complete the display gray scale of the EPD to achieve a high gray scale. The way the gate starts is that when a rising edge is detected, the conduction current is in the high level period of the gate. When the gate is high, the line is turned on, and when the gate is low, no current flows. Similarly, when oe is high, it is turned on, and when oe is low, it is turned off. Therefore, it is possible to control the high-level time and the duty cycle of oe by adjusting the duty cycle of the gate in a gate cycle, and at the same time control the time to obtain a smaller open time.

Description of drawings

Fig. 1 is a flow chart 1 of a method for adjusting EPD display grayscale provided by Embodiment 1 of the present invention;

Fig. 2 is the second flow chart of the method for adjusting the EPD display grayscale provided by Embodiment 1 of the present invention;

FIG. 3 is a waveform diagram of a display effect only in a gate duty cycle state provided by Embodiment 1 of the present invention;

Fig. 4 is a display effect waveform diagram in the state of adjusting the duty cycle of gate and source in the method for adjusting EPD display gray scale provided by Embodiment 1 of the present invention;

5 is a simplified diagram of the preset control process in the method for adjusting the gray scale of the EPD display provided by Embodiment 1 of the present invention;

Fig. 6 is a system structure diagram 1 for adjusting EPD display gray scale provided by Embodiment 2 of the present invention;

FIG. 7 is the second structural diagram of the system for adjusting the gray scale of the EPD display provided by the second embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

Embodiment one

This embodiment provides a method for adjusting the gray scale of the EPD display, as shown in Figure 1 and Figure 2, the method includes steps:

S1: Adjust the duty cycle of gate and source through the preset control process;

S2: In the power-on state, obtain the parameter status data and send the parameter status data. When the gate is at a high level, the line is turned on;

S3: In the power-on state, obtain the link of duty ratio adjustment gate and oe. When a waveform of a length is completed, the duty ratio obtains the parameter status data again, and then completes an execution until the waveform ends and enters the stop state. , waiting for the start of the next round of EPD.

As shown in Figure 5, the preset control process adopted by the duty cycle adjustment gate is from the power-on state, the start state, the duty cycle of the obtained parameter state, the gate rate of the obtained parameter state, the state of sending data to the stop state. In the control method of duty cycle adjustment gate, there is an additional step of obtaining the duty cycle of the gate and source. Therefore, every time a waveform of a length is completed, the duty cycle needs to be obtained again, and then executed once, until The waveform ends in the stop state, waiting for the start of the next round of EPD. Among them, ① indicates that the length of a waveform is completed, return to obtain the duty cycle, obtain the gate rate, and send data. ② Indicates that all waveform lengths are completed.

Refer to the waveform diagram of the display effect shown in Figure 3 in the case of only the duty cycle of the gate, oe is always 1, and the duty cycle adjustment gate corresponds to the waveform of oe and the actual conduction of the pixel.

Refer to Figure 4 for the high-grayscale one-length waveform display effect waveform diagram. The duty cycle of the gate can be changed. OE also has a duty cycle. In this case, it can be satisfied. The high-level duty cycle of the gate will not be very high. Low completes turn-on. oe also satisfies the high level time long enough. But the actual turn-on time of a single pixel is relatively small.

Referring to FIG. 2 , the parameter state data in step S2 includes duty cycle and gate rate.

Among them, the preset control process is to control the high level time and the duty cycle of oe by adjusting the duty cycle of the gate.

Among them, the steps are also included:

S4: Outputting the data entering the stop state in step S3 to the waveform display area for display.

Process the front-end image data into a grayscale image, and then store it in ddr3. When the driver starts running, read out the brightness value. According to the read brightness value, find a suitable waveform to complete the lighting.

This method adopts the duty cycle adjustment of the gate and the oe duty cycle adjustment in the source to complete the display gray scale of the EPD to achieve a high gray scale. The way the gate starts is that when a rising edge is detected, the conduction current is in the high level period of the gate. When the gate is high, the line is turned on, and when the gate is low, no current flows. Similarly, when oe is high, it is turned on, and when oe is low, it is turned off. Therefore, it is possible to control the high-level time and the duty cycle of oe by adjusting the duty cycle of the gate in a gate cycle, and at the same time control the time to obtain a smaller open time.

Embodiment two

This embodiment provides a system for adjusting the gray scale of the EPD display, as shown in Figure 6 and Figure 7, the system includes:

Adjustment module: used to adjust the duty cycle of gate and oe through the preset control process;

The first acquisition module: used to obtain parameter status data in the power-on state, and send the parameter status data. When the gate is at a high level, the line is turned on;

The second acquisition module: it is used to obtain the link of adjusting the gate and oe of the duty cycle in the power-on state. When a waveform of a length is completed, the duty cycle obtains the parameter status data again, and then completes an execution until the waveform After entering the stop state, it waits for the start of the next round of EPD.

Among them, the parameter state data includes duty cycle and gate rate.

Among them, the preset control process is to control the high level time and the duty cycle of oe by adjusting the duty cycle of the gate.

See Figure 7, also includes:

Output module: used to output the data entering the stop state in the second acquisition module to the waveform display area for display.

This system adopts the duty cycle adjustment of gate and the oe duty cycle adjustment in source to complete the display gray scale of EPD to achieve high gray scale.

Although the present disclosure is disclosed as above, the protection scope of the present 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 present disclosure, and these changes and modifications will all fall within the protection scope of the present 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.

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