Modulation chip driving method capable of multiplying grayscale of electrowetting electronic paper display

Abstract

The present invention proposes a modulation chip driving method for multiplying the grayscale of an electrowetting electronic paper display, comprising the following steps: step S1, first adopting a control system + driving chip driving system architecture, inputting n-bit image data of a display pixel into the control system; step S2, the control system splits the data into n bits by bit, and divides the display cycle into n sub-cycles, which are transmitted to the driving chip in sequence from low to high bits; step S3, the chip determines whether each bit of the input is less than 1, and outputs it after multiplying it by its corresponding weight or directly outputs it, and at the same time superimposes the output data of each bit n-1 times to form 2 m+1 A grayscale level, that is, a grayscale level that is twice as high; the present invention utilizes a control system + a driving mode of an existing driving chip, which can break through the highest driving grayscale level of the driving chip and achieve a higher grayscale display effect of the electrowetting electronic paper.

Description

Technical Field

[0001] The present invention relates to the technical field of display devices, in particular to a modulation chip driving method capable of multiplying the grayscale of an electrowetting electronic paper display. Background Art

[0002] Electrowetting displays use the voltage between the ink and the insulating substrate to control the deformation and contact angle of the ink on the substrate. The grayscale level is determined by the voltage. The voltage is provided by the driver chip output, so the driver chip output is closely related to the grayscale level of the display. However, as a new type of display, most of the research on electrowetting electronic paper displays focuses on electrowetting device structure, ink materials, image display, etc., while there is less research on grayscale display driving solutions.

[0003] Since the initial electrowetting display devices were mainly used for text and image display, the grayscale requirements were low, so the grayscale levels that the driver chips designed by major companies could drive were relatively low. However, nowadays, electrowetting electronic paper displays are developing in the direction of "high color quality", "video playback" and "low power consumption", and low grayscale levels no longer meet the display quality requirements. At present, most driving schemes are limited by the driver chip. Therefore, in order to break through the limitations of the driver chip to achieve higher grayscale and further improve the display effect of electrowetting electronic paper, it is necessary to invent a driving method for multiplying the grayscale modulation chip of the electrowetting electronic paper display. Summary of the invention

[0004] The present invention proposes a modulation chip driving method that can double the grayscale of an electrowetting electronic paper display. By utilizing a control system + an existing driving chip driving method, the highest driving grayscale of the driving chip can be exceeded, thereby achieving a higher grayscale display effect of the electrowetting electronic paper.

[0005] The present invention adopts the following technical solutions.

[0006] A modulation chip driving method for multiplying the grayscale of an electrowetting electronic paper display is used to multiply the grayscale displayed by the pixels of the electronic paper display. The driver chip can only achieve a maximum of 2 in a single display cycle. m A gray level, comprising the following steps;

[0007] Step S1: firstly adopt a driving system architecture of a control system + a driving chip, and input n-bit image data of display pixels into the control system;

[0008] Step S2, the control system splits the data into n bits, and divides the display period into n sub-periods, and transmits them to the driving chip in sequence from low to high bits;

[0009] Step S3: The chip determines whether each bit of the input is less than 1, and multiplies it by its corresponding weight before outputting it or directly outputting it. At the same time, the output data of each bit is superimposed n-1 times to form 2 m+1 A grayscale level, that is, twice the grayscale level.

[0010] The input image data is n-bit binary data, each bit is split bit by bit and input into the driving chip in sequence from low bit to high bit, wherein the size of n is limited by the modulation speed of the electronic paper display element.

[0011] The display cycle division is to divide a display cycle into n sub-cycles according to the input n-bit image data, and one sub-cycle transmits one bit of data to the driver chip. The driver chip outputs m-bit data at most in each sub-cycle.

[0012] When the chip drives the pixels of the electronic paper display to display, the grayscale level of the pixels of the electronic paper display is 0≤m≤n-1.

[0013] In step S3, the driver chip judges the data outputted to it by the control system in each sub-cycle. If the bit is 1, it is multiplied by the bit weight. If the bit is 0, the driver chip outputs 000000 in this sub-cycle.

[0014] The relationship between the weight and the position is expressed in a table as follows:

[0015] Location 1 2 3 … n-2 n-1 n Weight 0…01 0…010 0…0100 … 010...0 10…0 11...11 .

[0016] If the image data input to the driving chip of the electrowetting electronic paper display is seven bits, that is, n is 7, the relationship between the weight and the bit is:

[0017] When the position is 0, the weight is 000000;

[0018] When the position is 1, the weight is 000001;

[0019] When the position is 2, the weight is 000010;

[0020] When the position is 3, the weight is 000100;

[0021] When the position is 4, the weight is 001000;

[0022] When the position is 5, the weight is 010000;

[0023] When the position is 6, the weight is 100000;

[0024] When the position is 7, the weight is 111111.

[0025] The electronic paper is an electrowetting electronic paper driven by voltage. When seven bits of image data are input, the driver chip superimposes the output of each sub-cycle together and displays them one by one quickly. Through the visual persistence mechanism of the human eye, 128 gray levels are formed in the display effect.

[0026] The driving chip drives the electronic paper display to display with the output analog voltage. The relationship between the weight and the amplitude of the corresponding analog voltage is expressed as follows:

[0027] V i =2V i-1 , 0<i≤n

[0028] Where V i is the analog voltage output by the driver chip during the i-th display sub-cycle, and n is the number of bits of the input image data.

[0029] Compared with the prior art, the present invention has the following beneficial effects: when the grayscale of the display driven by the electrowetting driving chip is limited, in order to improve the display effect, the present invention can double the grayscale level of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0031] Attached Figure 1 It is a schematic diagram of the process of the present invention;

[0032] Attached Figure 2 It is a schematic diagram of the display process of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] As shown in the figure, the modulation chip driving method for doubling the grayscale of the electrowetting electronic paper display is used to doubling the grayscale displayed by the pixels of the electronic paper display. The driver chip can only achieve a maximum of 2 in a single display cycle. m A gray level, comprising the following steps;

[0037] Step S1: firstly adopt a driving system architecture of a control system + a driving chip, and input n-bit image data of display pixels into the control system;

[0038] Step S2, the control system splits the data into n bits, and divides the display period into n sub-periods, and transmits them to the driving chip in sequence from low to high bits;

[0039] Step S3: The chip determines whether each bit of the input is less than 1, and multiplies it by its corresponding weight before outputting it or directly outputting it. At the same time, the output data of each bit is superimposed n-1 times to form 2 m+1 A grayscale level, that is, twice the grayscale level.

[0040] The input image data is n-bit binary data, each bit is split bit by bit and input into the driving chip in sequence from low bit to high bit, wherein the size of n is limited by the modulation speed of the electronic paper display element.

[0041] The display cycle division is to divide a display cycle into n sub-cycles according to the input n-bit image data, and one sub-cycle transmits one bit of data to the driver chip. The driver chip outputs m-bit data at most in each sub-cycle.

[0042] When the chip drives the pixels of the electronic paper display to display, the grayscale level of the pixels of the electronic paper display is 0≤m≤n-1.

[0043] In step S3, the driver chip judges the data outputted to it by the control system in each sub-cycle. If the bit is 1, it is multiplied by the bit weight. If the bit is 0, the driver chip outputs 000000 in this sub-cycle.

[0044] The relationship between the weight and the position is expressed in a table as follows:

[0045] Location 1 2 3 … n-2 n-1 n Weight 0…01 0…010 0…0100 … 010...0 10…0 11...11 .

[0046] If the image data input to the driving chip of the electrowetting electronic paper display is seven bits, that is, n is 7, the relationship between the weight and the bit is:

[0047] When the position is 0, the weight is 000000;

[0048] When the position is 1, the weight is 000001;

[0049] When the position is 2, the weight is 000010;

[0050] When the position is 3, the weight is 000100;

[0051] When the position is 4, the weight is 001000;

[0052] When the position is 5, the weight is 010000;

[0053] When the position is 6, the weight is 100000;

[0054] When the position is 7, the weight is 111111.

[0055] The electronic paper is an electrowetting electronic paper driven by voltage. When seven bits of image data are input, the driver chip superimposes the output of each sub-cycle together and displays them one by one quickly. Through the visual persistence mechanism of the human eye, 128 gray levels are formed in the display effect.

[0056] The driving chip drives the electronic paper display to display with the output analog voltage. The relationship between the weight and the amplitude of the corresponding analog voltage is expressed as follows:

[0057] V i =2V i-1 , 0<i≤n

[0058] Where V i is the analog voltage output by the driver chip during the i-th display sub-cycle, and n is the number of bits of the input image data.

[0059] like Figure 2 As shown, since the electrowetting electronic paper is a voltage-driven display, if 7-bit image data is input, when the output of each sub-cycle is superimposed together, 128 gray levels can be formed. Compared with the maximum 64 gray levels that can be achieved when the electrowetting electronic paper driver chip is used alone, the display grayscale is doubled.

[0060] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0061] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0062] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0063] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0064] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A modulation chip driving method for doubling the grayscale of an electrowetting electronic paper display, which is used to doubling the grayscale displayed by the pixels of the electronic paper display. The driver chip can only achieve a maximum of 2 in a single display cycle. m A grayscale level characterized by: The steps include: Step S1: firstly adopt a driving system architecture of a control system + a driving chip, and input n-bit image data of display pixels into the control system; Step S2, the control system splits the data into n bits, and divides the display period into n sub-periods, and transmits them to the driving chip in sequence from low to high bits; Step S3: The chip determines whether each bit of the input is less than 1, multiplies it by its corresponding weight and then outputs it or directly outputs it. At the same time, the output data of each bit is superimposed n-1 times to form 2 m+1 A gray level, that is, a gray level that is twice as high; The input image data is n-bit binary data, each bit is split into bits, and is sequentially input to the driver chip from low bits to high bits, wherein the size of n is limited by the modulation speed of the electronic paper display element; The display cycle division is to divide a display cycle into n sub-cycles according to the input n-bit image data, and one sub-cycle transmits one bit of data to the driver chip, and the driver chip outputs m-bit data at most in each sub-cycle; In step S3, the driver chip judges the data outputted to it by the control system in each sub-cycle. If the bit is 1, it is multiplied by the weight of the bit. If the bit is 0, the driver chip outputs 000000 in this sub-cycle. If the image data input to the driving chip of the electrowetting electronic paper display is seven bits, that is, n is 7, the relationship between the weight and the bit is: When the position is 0, the weight is 000000; When the position is 1, the weight is 000001; When the position is 2, the weight is 000010; When the position is 3, the weight is 000100; When the position is 4, the weight is 001000; When the position is 5, the weight is 010000; When the position is 6, the weight is 100000; When the position is 7, the weight is 111111; The electronic paper is an electrowetting electronic paper driven by voltage. When seven bits of image data are input, the driver chip superimposes the output of each sub-cycle together and displays them one by one quickly. Through the visual persistence mechanism of the human eye, 128 gray levels are formed in the display effect.

2. The method for driving a modulation chip capable of multiplying the grayscale of an electrowetting electronic paper display according to claim 1, characterized in that: When the chip drives the pixel display of the electronic paper display, the gray level of the pixel of the electronic paper display is 2 m , where 0≦m≦n-1.

3. The method for driving a modulation chip capable of multiplying the grayscale of an electrowetting electronic paper display according to claim 1, characterized in that: The driving chip drives the electronic paper display to display by outputting an analog voltage.

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