CN115985257A - A driving method and system for an electronic paper module - Google Patents

Abstract

The invention provides a method and system for driving an electronic paper module, and relates to the technical field of electronic paper module display. The method includes S1: obtaining parameter status data in a power-on state, and sending the parameter status data; S2: inputting It is driven by a period of high level composed of the positive voltage at the preset first moment and the negative voltage at the second preset moment; S3: According to the positive voltage and negative voltage canceling out the particle motion, the time particle moves forward and reverse The time is the difference between the preset first moment and the preset second moment, and the forward and reverse movement time is taken as the minimum time unit for particle running. The method can improve the display gray scale of the EPD.

Description

A driving method and system for an electronic paper module

technical field

The present invention relates to the technical field of electronic paper module display, in particular, to a driving method and system for an electronic paper module.

Background technique

In the EPD display, the displayed gray scale is usually below 16 gray scales. The specifications of black and white screens are usually 2 gray scales, 4 gray scales, and the largest is 16 gray scales. The main reason is that the opening time of the gate is too long. If it is too long, it means that the time of CKV high level is too long. The refresh rate is only 200k. The speed is not fast enough, limited by the driver chip, which needs enough energy. Supplying enough energy takes time. Because it requires more energy, the high level time of CKV, that is, the time for charging the driver chip is longer. Since there is an upper limit to the speed, there is a lower limit to the time unit that lights up. It is because the lower limit of the lighting time unit is too high to be fine, so 16 time units will reach the maximum value, and a higher gray scale cannot be achieved.

Contents of the invention

The problem solved by the invention is how to improve the display gray scale of the EPD.

In order to solve the above problems, the present invention provides a method for driving an electronic paper module, comprising the steps of:

S1: In the power-on state, obtain the parameter status data and send the parameter status data;

S2: The input is driven by a cycle of high level composed of the positive voltage at the preset first moment and the negative voltage at the second preset moment;

S3: According to the positive and negative voltages canceling out the particle movement, the time for the particles to move forward and reverse is the difference between the preset first moment and the preset second moment, and the forward and reverse movement time is taken as the minimum time for the particles to run unit.

In the above method, the time of inputting the high level of the positive voltage is longer than the time of the high level of the negative voltage. Positive and negative voltages cancel each other out particle motion. The forward and reverse movement time of the time particle is obtained through the difference between the preset first moment and the preset second moment. As long as the time of the preset first moment is controlled, the time for the time particles to move forward and backward can be very small. If the time when the particles move in the forward and reverse directions is taken as the minimum time unit for the particles to run, more gray scales can be expressed, thereby improving the display gray scale of the EPD. Every time a waveform of a length is completed, the duty cycle needs to be acquired again, and then an execution is completed until the waveform ends and enters the stop state, waiting for the start of the next round of EPD.

Further, the parameter status data in the step S1 includes gate duty cycle and gate rate.

Further, steps are also included:

S4: Every time a waveform of a length is completed, reacquire the parameter status data of the gate duty cycle and gate rate, and then complete an execution until the waveform ends and enters the stop state, waiting for the start of the next round of EPD.

Further, the step S4 includes:

S41: output the data entering the stop state to the waveform display area for display.

Further, the preset first moment in the step S2 is greater than the preset second moment.

A drive system for an electronic paper module, comprising:

Acquisition unit: used to obtain parameter status data and send parameter status data in the power-on state;

Voltage input unit: used to input a cycle of high level consisting of a preset positive voltage at the first moment and a preset negative voltage at the second moment for driving;

The minimum time unit selection unit: used to cancel the particle movement according to the positive voltage and the negative voltage. The smallest unit of time to run as a particle.

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

Further, it also includes:

Execution unit: It is used to reacquire the parameter status data of the gate duty cycle and gate rate each time a waveform of a length is completed, and then complete an execution until the waveform ends and enters the stop state, waiting for the start of the next round of EPD.

Further, the execution unit includes:

Display subunit: used to output the data entering the stop state to the waveform display area for display.

Further, the preset first moment is greater than the preset second moment.

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

The present invention selects the lighting of the minimum time unit by adjusting the difference between the time of inputting the high level of the positive voltage and the time of the high level of the negative voltage. The shorter the lighting time, the lower the lower limit, so the gray scale that can be achieved is higher.

Description of drawings

FIG. 1 is a flow chart 1 of the driving method of the electronic paper module provided by Embodiment 1 of the present invention;

FIG. 2 is the second flow chart of the driving method of the electronic paper module provided by Embodiment 1 of the present invention;

Fig. 3 is a waveform diagram of the display effect comparing the driving method of the electronic paper module provided by Embodiment 1 of the present invention with the traditional high-level superposition method;

FIG. 4 is a graph of the brightness gray scale at the preset second time t1 in the driving method of the electronic paper module provided by Embodiment 1 of the present invention;

FIG. 5 is a graph of the brightness gray scale at the preset first time t2 in the driving method of the electronic paper module provided by Embodiment 1 of the present invention;

FIG. 6 is a structural diagram 1 of the driving system of the electronic paper module provided by Embodiment 2 of the present invention;

FIG. 7 is the second structure diagram of the driving system of the electronic paper module 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 driving an electronic paper module, as shown in Figure 1 and Figure 2, the method includes steps:

S1: In the power-on state, obtain the parameter status data and send the parameter status data;

S2: The input is driven by a cycle of high level composed of the positive voltage at the preset first moment and the negative voltage at the second preset moment;

S3: According to the positive and negative voltages canceling out the particle movement, the time for the particles to move forward and reverse is the difference between the preset first moment and the preset second moment, and the forward and reverse movement time is taken as the minimum time for the particles to run unit.

Referring to FIG. 3 , specifically, in the traditional method, high levels are all superimposed. The smallest high-level time unit is the high-level t1 of one cycle in the figure. The time scale is relatively large, and the gray scale that can be represented will be relatively small. In this method, it is driven by inputting a cycle of high level composed of the positive voltage at the preset first moment t2 and the negative voltage at the preset second moment t1, and the time of inputting the high level of the positive voltage is higher than that of the negative voltage The level time is large. Positive and negative voltages cancel each other out particle motion. The forward and reverse movement time t of the time particle is obtained through the difference between the preset first moment t2 and the preset second moment t1. As long as the time of the preset first moment t2 is controlled, the time t of time particles moving forward and backward can be very small. If the time t of time particles moving forward and backward is taken as the minimum time unit of particle running, more gray scales can be expressed, thereby improving the display gray scale of EPD.

Referring to Fig. 4, if the time unit is smaller, the degree of subdivision in the process of expressing the maximum brightness is more. The image is more delicate. When t1 is smaller, it can represent 16 gray levels.

Referring to FIG. 5 , t2 is larger than t1 and can only represent 8 gray levels.

Wherein, the parameter state data in step S1 includes gate duty cycle and gate rate.

Refer to Fig. 2, wherein, also includes step S4: when completing the waveform of a length, reacquire the parameter status data of gate duty ratio and gate rate once, then complete an execution, until the waveform ends and enters the stop state, waits for the next round of EPD initiation.

Wherein, step S4 includes S41: output the data entering the stop state to the waveform display area for display.

Wherein, the preset first moment in step S2 is greater than the preset second moment.

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.

In this method, the lighting of the minimum time unit is selected by adjusting the difference between the time when the positive voltage is input at a high level and the time when the negative voltage is at a high level. The shorter the lighting time, the lower the lower limit, so the gray scale that can be achieved is higher.

Embodiment two

This embodiment provides a drive system for an electronic paper module, as shown in Figure 6 and Figure 7, the system includes:

Acquisition unit: used to obtain parameter status data and send parameter status data in the power-on state;

Voltage input unit: used to input a cycle of high level consisting of a preset positive voltage at the first moment and a preset negative voltage at the second moment for driving;

The minimum time unit selection unit: used to cancel the particle movement according to the positive voltage and the negative voltage. The smallest unit of time to run as a particle.

Wherein, the parameter status data includes gate duty cycle and gate rate.

Among them, it also includes an execution unit: it is used to reacquire the parameter status data of the gate duty cycle and the gate rate once every time a waveform of a length is completed, and then complete an execution until the waveform ends and enters the stop state, waiting for the next round of EPD start.

Wherein, the execution unit includes a display subunit: used to output the data entering the stop state to the waveform display area for display.

Wherein, the preset first moment is greater than the preset second moment.

The system inputs the difference between the time of positive voltage high level and the time of negative voltage high level through the voltage input unit, and selects the lighting of the minimum time unit through the minimum time unit selection unit. The shorter the lighting time, the lower the lower limit, so the gray scale that can be achieved is higher.

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 (10)

1. A driving method of an electronic paper module, comprising the steps of: S1: In the power-on state, obtain the parameter status data and send the parameter status data; S2: The input is driven by a cycle of high level composed of the positive voltage at the preset first moment and the negative voltage at the second preset moment; S3: According to the positive and negative voltages canceling out the particle movement, the time for the particles to move forward and reverse is the difference between the preset first moment and the preset second moment, and the forward and reverse movement time is taken as the minimum time for the particles to run unit. 2. The driving method of the electronic paper module according to claim 1, wherein the parameter status data in the step S1 includes gate duty cycle and gate speed. 3. The driving method of the electronic paper module according to claim 2, further comprising the steps of: S4: Every time a waveform of a length is completed, reacquire the parameter status data of the gate duty cycle and gate rate, and then complete an execution until the waveform ends and enters the stop state, waiting for the start of the next round of EPD. 4. The driving method of the electronic paper module according to claim 3, wherein the step S4 comprises: S41: output the data entering the stop state to the waveform display area for display. 5 . The driving method of the electronic paper module according to claim 1 , wherein the preset first moment in the step S2 is greater than the preset second moment. 6. A drive system for an electronic paper module, comprising: Acquisition unit: used to obtain parameter status data and send parameter status data in the power-on state; Voltage input unit: used to input a cycle of high level consisting of a preset positive voltage at the first moment and a preset negative voltage at the second moment for driving; The minimum time unit selection unit: used to cancel the particle movement according to the positive voltage and the negative voltage. The smallest unit of time to run as a particle. 7. The driving system of the electronic paper module according to claim 6, wherein the parameter state data includes gate duty cycle and gate rate. 8. The driving system of the electronic paper module according to claim 7, further comprising: Execution unit: It is used to reacquire the parameter status data of the gate duty cycle and gate rate each time a waveform of a length is completed, and then complete an execution until the waveform ends and enters the stop state, waiting for the start of the next round of EPD. 9. The driving system of the electronic paper module according to claim 8, wherein the execution unit comprises: Display subunit: used to output the data entering the stop state to the waveform display area for display. 10 . The driving system of the electronic paper module according to claim 6 , wherein the preset first moment is greater than the preset second moment. 11 .

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