A circuit structure for increasing the number of output voltage levels of an electronic paper

Abstract

The present invention relates to a circuit structure for increasing the number of output voltage levels of an electronic paper, which includes a hanging wire SX for providing an input voltage, signal control lines GX1, GX2, GX3, and a plurality of electrical signal transmission circuits. Each electrical signal transmission circuit includes a first input terminal, a second input terminal, a first control terminal, a second control terminal, a third control terminal, and an output terminal. The first input terminal of each electrical signal transmission circuit is electrically connected to an output terminal of an external driving integrated circuit, the second input terminal of each electrical signal transmission circuit is electrically connected to the hanging wire SX, the first control terminal of each electrical signal transmission circuit is electrically connected to the signal control line GX1, the second control terminal of each electrical signal transmission circuit is electrically connected to the signal control line GX2, the third control terminal of each electrical signal transmission circuit is electrically connected to the signal control line GX3, and the output terminal of each electrical signal transmission circuit is electrically connected to a data line on the electronic paper display panel: Through the present invention, multiple signal outputs can be achieved when the integrated circuit has only a few output signals.

Description

Technical Field

[0001] The present invention relates to the field of electronic paper displays, and more particularly, to a circuit structure for increasing the number of output voltage levels of an electronic paper. Background Art

[0002] In general, due to port limitations, the driving integrated circuits used in electronic paper have fewer output source voltage levels. For example, the driving integrated circuit for matching a black-and-white screen can only output three types of voltages: on, off, and ground at the same time, while the driving integrated circuit for matching a three-color screen can output four groups of voltages: two color driving voltages, one off voltage, and a ground signal voltage at the same time.

[0003] However, currently, electronic paper is developing towards the multi-color direction. Driving a variety of different colored electronic ink particles requires the ability to output multiple different source voltages simultaneously.

[0004] In the prior art, multiple color driving is achieved by changing the output voltage of the integrated circuit or by providing an integrated circuit with multiple output signals. However, for a driving integrated circuit with a small number of output voltage values, it is difficult to achieve color driving. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a circuit structure for increasing the number of output voltage levels of an electronic paper, which can output multiple groups of driving voltages to the electronic paper display area.

[0006] The circuit structure for increasing the number of output voltage levels of an electronic paper provided by the present invention has the following technical solutions:

[0007] A circuit structure for increasing the number of output voltage levels of an electronic paper includes a hanging wire SX for providing an input voltage, and further includes a signal control line GX1, a signal control line GX2, a signal control line GX3, and a plurality of electrical signal transmission circuits. Each of the electrical signal transmission circuits includes a first input terminal, a second input terminal, a first control terminal, a second control terminal, a third control terminal, and an output terminal. The first input terminal of each of the electrical signal transmission circuits is electrically connected to an output terminal of an external driving integrated circuit, the second input terminal of each of the electrical signal transmission circuits is electrically connected to the hanging wire SX, the first control terminal of each of the electrical signal transmission circuits is electrically connected to the signal control line GX1, the second control terminal of each of the electrical signal transmission circuits is electrically connected to the signal control line GX2, the third control terminal of each of the electrical signal transmission circuits is electrically connected to the signal control line GX3, and the output terminal of each of the electrical signal transmission circuits is electrically connected to a data line of the electronic paper.

[0008] With the above technical solution, compared with the prior art, the technical solution provided by the present invention application can at least bring the following beneficial effects: By setting the signal control line GX1, the signal control line GX2, the signal control line GX3 and the hanging line SX, combined with the two input ends and one output end of the electrical signal transmission circuit, when the electrical signals at the input ends are determined, the voltage distribution of the signal control line GX1, the signal control line GX2 and the signal control line GX3 can be changed to control the input signals, so as to achieve multiple output results. Furthermore, after connecting this circuit structure between the electronic paper display area and the driving circuit, multiple color driving voltages can be written.

[0009] Preferably, the electrical signal transmission circuit includes a transistor T1, a transistor T2 and a transistor T3. The gate of the transistor T1 is electrically connected to the first control end, the source of the transistor T1 is electrically connected to the first input end, and the drain of the transistor T1 is electrically connected to the output end; the gate of the transistor T2 is electrically connected to the second control end, the source of the transistor T2 is electrically connected to the output end, and the drain of the transistor T2 is electrically connected to the first input end; the gate of the transistor T3 is electrically connected to the third control end, the source of the transistor T3 is electrically connected to the first input end, and the drain of the transistor T3 is electrically connected to the second input end. In this way, under the control combination of the on and off states of the transistor T1, the transistor T2 and the transistor T3, multiple cases of electrical signal output can be achieved.

[0010] Preferably, the channel width-to-length ratios of the transistor T1, the transistor T2 and the transistor T3 are the same; this is beneficial to realizing stable voltage distribution while ensuring multiple groups of voltage outputs. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of the circuit structure of the present invention.

[0012] Among them, the numbers marked in the figure respectively represent: 1. The first input end; 2. The second input end; 3. The first control end; 4. The second control section; 5. The third control end; 6. The output end. Detailed Embodiment

[0013] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0014] A circuit structure for increasing the number of output voltage levels of an electronic paper provided by an embodiment of the present invention includes a hanging wire SX for providing an input voltage, signal control lines GX1, GX2, GX3, and a plurality of electrical signal transmission circuits. Each electrical signal transmission circuit includes a first input terminal 1, a second input terminal 2, a first control terminal 3, a second control terminal 4, a third control terminal 5, and an output terminal 6. The first input terminal 1 of each electrical signal transmission circuit is electrically connected to an output terminal of an external driving integrated circuit. The second input terminal 2 of each electrical signal transmission circuit is electrically connected to the hanging wire SX. The first control terminal 3 of each electrical signal transmission circuit is electrically connected to the signal control line GX1. The second control terminal 4 of each electrical signal transmission circuit is electrically connected to the signal control line GX2. The third control terminal 5 of each electrical signal transmission circuit is electrically connected to the signal control line GX3. The output terminal 6 of each electrical signal transmission circuit is electrically connected to a data line on the electronic paper display panel.

[0015] In this embodiment, based on the first input terminal 1, the second input terminal 2, the first control terminal 3, the second control terminal 4, the third control terminal 5, and the output terminal 6, the electrical signal transmission circuit includes a transistor T1, a transistor T2, and a transistor T3. The gate of the transistor T1 is electrically connected to the first control terminal 3. The source of the transistor T1 is electrically connected to the first input terminal 1. The drain of the transistor T1 is electrically connected to the output terminal 6. The gate of the transistor T2 is electrically connected to the second control terminal 4. The source of the transistor T2 is electrically connected to the output terminal 6. The drain of the transistor T2 is electrically connected to the first input terminal 1. The gate of the transistor T3 is electrically connected to the third control terminal 5. The source of the transistor T3 is electrically connected to the first input terminal 1. The drain of the transistor T3 is electrically connected to the second input terminal 2.

[0016] In this embodiment, the channel width-to-length ratios of the transistors T1, T2, and T3 are the same, which can be 30:5. Of course, it can also be adjusted to other values.

[0017] During use, this circuit structure needs to be inserted between the driving integrated circuit and the inherent circuit of the electronic paper. The connection method requires that an output terminal of this circuit is electrically connected to a data line, so as to be able to drive the electronic paper to display multiple colors even when the driving integrated circuit has fewer output electrical signals.

[0018] Of course, when connecting the circuit, the connection positions of the sources and drains of the transistors T1, T2, and T3 can be changed. For example, the drain of the transistor T1 can be electrically connected to the first input terminal 1, and the source of the transistor T1 can be electrically connected to the output terminal 6.

[0019] In summary, although embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to the embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit structure for increasing the number of output voltage levels of an electronic paper, including a hanging wire SX for providing an input voltage, characterized in that: It further includes a signal control line GX1, a signal control line GX2, a signal control line GX3, and a plurality of electrical signal transmission circuits. Each of the electrical signal transmission circuits includes a first input terminal (1), a second input terminal (2), a first control terminal (3), a second control terminal (4), a third control terminal (5), and an output terminal (6). The first input terminal (1) of each of the electrical signal transmission circuits is electrically connected to an output terminal of an external driving integrated circuit. The second input terminal (2) of each of the electrical signal transmission circuits is electrically connected to the hanging wire SX. The first control terminal (3) of each of the electrical signal transmission circuits is electrically connected to the signal control line GX1. The second control terminal (4) of each of the electrical signal transmission circuits is electrically connected to the signal control line GX2. The third control terminal (5) of each of the electrical signal transmission circuits is electrically connected to the signal control line GX3. The output terminal (6) of each of the electrical signal transmission circuits is electrically connected to a data line of the electronic paper; The electrical signal transmission circuit includes a transistor T1, a transistor T2, and a transistor T3. The gate of the transistor T1 is electrically connected to the first control terminal (3). The source of the transistor T1 is electrically connected to the first input terminal (1). The drain of the transistor T1 is electrically connected to the output terminal (6). The gate of the transistor T2 is electrically connected to the second control terminal (4). The source of the transistor T2 is electrically connected to the output terminal (6). The drain of the transistor T2 is electrically connected to the first input terminal (1). The gate of the transistor T3 is electrically connected to the third control terminal (5). The source of the transistor T3 is electrically connected to the first input terminal (1). The drain of the transistor T3 is electrically connected to the second input terminal (2).

2. The circuit structure for increasing the number of output voltage levels of an electronic paper according to claim 1, wherein: The transistor T1, the transistor T2, and the transistor T3 have the same channel width-to-length ratio.

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