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Bidirectional shift register

A shift register, transfer direction technology, applied in static memory, digital memory information, instruments, etc., can solve problems such as time required

Inactive Publication Date: 2006-08-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, for example, when using the above-mentioned bidirectional shift register as a data line driving circuit, when the design is changed, it is necessary to consider the change in the pulse width of the output signal, and the design work takes time.

Method used

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Examples

Experimental program
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Embodiment Construction

[0113]

[0114] figure 1 It is a block diagram showing the overall configuration of the electro-optical device 1 to which the data line drive circuit 200 serving as the bidirectional shift register of the present embodiment is applied.

[0115] First, the electro-optical device 1 uses liquid crystal as an electro-optic material. This electro-optical device 1 has a liquid crystal panel AA as a main part. The liquid crystal panel AA has, as a switching element, an element substrate on which a thin film transistor (hereinafter referred to as "TFT") is formed as a switching element, an opposing substrate arranged to face the element substrate at a certain interval, and an element substrate between these element substrates. and the liquid crystal disposed between the opposing substrates.

[0116] The electro-optical device 1 includes a timing generation circuit 300 and an image processing circuit 400 in addition to the liquid crystal panel AA. The element substrate of the liq...

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PUM

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Abstract

The invention relates to a bidirectional shift register which can make the same of output signal pulse widths when it is formed by positive logic or passive logic, wherein the data line driving circuit (200) has multistage shift register unit circuit (A) which has the first and second transmission gates (201, 202) for synchronously transmitting the pulse STX with the X clock signal XCK and the reversed X clock signal XCKB; the first logic circuit (203) for reversed outputting input signal; and the first and second clock-control inverters (204, 205) for making the logic potential of transmission direction control signal DIR effective; the output of first logic circuit (203) is connected to the input of inverters (204, 205) whose outputs are connected to the input of first logic circuit (203) via the transmission doors (201, 202).

Description

technical field [0001] The present invention relates to a bidirectional shift register, which can be applied to, for example, data line driving circuits and scanning line driving circuits of liquid crystals, electro-optical devices and electronic equipment using these driving circuits. Background technique [0002] Conventionally, a liquid crystal display device is known as an electro-optical device that displays an image in an image display area. This liquid crystal display device includes, for example, a data line driver circuit and a scan line driver circuit for supplying data line signals, scan signals, and the like to data lines and scan lines wired in an image display region at predetermined timings. Such a data line driving circuit and a scanning line driving circuit have a bidirectional shift register that outputs a sampling signal, and write an image signal into each pixel based on the sampling signal. [0003] <1: The structure of the bidirectional shift regist...

Claims

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Application Information

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IPC IPC(8): G11C19/28G09G3/36
CPCG11C19/28G09G3/3688G09G3/3677G09G2310/0283G09G3/20G11C19/00H03K19/00
Inventor 片山茂宪
Owner SEIKO EPSON CORP
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