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Logic operation circuit, display driving circuit and liquid crystal display

A logic operation circuit and circuit technology, applied in the fields of display drive circuits, liquid crystal displays, and logic operation circuits, can solve the problems of increasing product cost, increasing the number of output pins of integrated circuits, and saving the number of output pins and reducing costs. Effect

Active Publication Date: 2016-10-12
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in general, these control signals of the DE-MUX circuit are output by a separate pin of the integrated circuit (IC). ) the number of output pins will also increase the cost of the product

Method used

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  • Logic operation circuit, display driving circuit and liquid crystal display
  • Logic operation circuit, display driving circuit and liquid crystal display
  • Logic operation circuit, display driving circuit and liquid crystal display

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] see figure 1 , figure 1 It is a circuit structure schematic diagram of an embodiment of a logic operation circuit used in a DE-MUX circuit.

[0040] Such as figure 1 As shown, the logical operation circuit 10 used in the DE-MUX circuit is composed of an input terminal 11 , a processing circuit 12 and an output terminal 13 connected in sequence. Wherein, the input terminal 11 is used to connect to the second control terminal of the integrated circuit ...

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Abstract

The invention discloses a logic operation circuit used for a DE-MUX circuit, a display driving circuit and a liquid crystal display. The logic operation circuit comprises an input end, a processing circuit and output ends which are connected in sequence, wherein the input end is used for connecting a control end of an integrated circuit (IC) controlling the DE-MUX circuit, so as to receive a first control signal output by the control end of the integrated circuit; the output ends are used for connecting control ends of the DE-MUX circuit, the number of the output ends is the same as the number of the control ends of the DE-MUX circuit, and the output ends and the control ends of the DE-MUX circuit are in one-to-one correspondence; and the processing circuit is used for controlling the first control signal into second control signals required by the control ends of the DE-MUX circuit, and outputting the second control signals to the output ends. By adopting the logic operation circuit, the display driving circuit and the liquid crystal display, the amount of output Pins of the IC can be saved, and the cost can be saved.

Description

technical field [0001] The invention relates to the technical field of panel display, in particular to a logic operation circuit for a DE-MUX circuit, a display driving circuit and a liquid crystal display. Background technique [0002] The demultiplexer (DE-MUX) is a circuit commonly used in the array manufacturing process of thin film transistor liquid crystal displays to reduce the number of output pins of integrated circuits (ICs). [0003] There are two types of multiplexer circuits commonly used at present: the first is the DE-MUX controlled by NTFT; the second is the DE-MUX controlled by the transmission gate. The DE-MUX circuits in these two cases require three control signals (CKR, CKG, CKB) and six control signals (CKR, CKG, CKB, XCKR, XCKG, XCKB) respectively to realize the integrated circuit (IC) signal. Multiple outputs, thereby greatly reducing the number of output pins of the IC. However, in general, these control signals of the DE-MUX circuit are output by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3648
Inventor 洪光辉龚强
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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