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Driving circuit for liquid crystal display device

A technology of liquid crystal display device and driving circuit, which is used in static indicators, nonlinear optics, instruments, etc.

Inactive Publication Date: 2011-01-05
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Driving circuit for liquid crystal display device
  • Driving circuit for liquid crystal display device
  • Driving circuit for liquid crystal display device

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Embodiment approach 1

[0140] One embodiment of the present invention will be described below with reference to the drawings.

[0141] (Structure of liquid crystal display device)

[0142] The liquid crystal display device 10 of the present invention has substantially the same Image 6 The liquid crystal display device 10 described has the same configuration.

[0143] That is, the above-mentioned liquid crystal display device 10 adopts the structure of a so-called active matrix liquid crystal display device 10, and a pixel TFT (Thin Film Transistor: thin film transistor) 30 as a switching element is provided in each pixel 16, and a plurality of them are arranged. The above-mentioned pixels 16 are arranged in a grid (matrix).

[0144] Then, a plurality of video signal lines 20 and a plurality of scanning signal lines 22 are provided along directions orthogonal to each other between the pixels 16 arranged in the above-mentioned grid pattern. In addition, an auxiliary capacitor power supply line 24 i...

Embodiment approach 2

[0211] based on Figure 5 Other embodiments of the present invention will be described as follows. here, Figure 5 It shows an embodiment of the present invention, and is a block diagram showing a schematic configuration of the source driver 52 and the source driver reference voltage generator 70 .

[0212] In addition, this embodiment is the same as the said Embodiment 1 except the structure demonstrated. In addition, for convenience of description, members having the same functions as those shown in the drawings of Embodiment 1 above are given the same reference numerals, and description thereof will be omitted.

[0213] The source driver reference voltage generation unit 70 of the present embodiment is different from the source driver reference voltage generation unit 70 of the first embodiment above in that the position where the selection circuit 86 is provided on the circuit is different.

[0214] That is, in Embodiment 1, as described above Figure 4 As shown, the s...

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Abstract

A circuit for driving an active matrix type of liquid crystal display apparatus comprises a scan signal line driving circuit; a source driver (52) that outputs a video signal the polarity of which is frame-inverted, while being inverted in synchronism with the horizontal scan intervals; a reference voltage producing part (70) that is coupled to the source driver (52); and an auxiliary capacitive electrode driving circuit that outputs, to an auxiliary capacitive power supply line, an auxiliary capacitive power supply line voltage the polarity of which is inverted each frame. The reference voltage producing part (70), which includes selecting circuits (86) each of which selects either a reference power supply voltage during a normal display or a reference power supply voltage at a display commencement, supplies the reference power supply voltage at the display commencement as a reference power supply voltage for the source driver (52) during the first frame interval just after the display commencement, thereby suppressing the occurrence of horizontal thread-like emission lines during the first frame interval just after the display commencement.

Description

technical field [0001] The present invention relates to a liquid crystal display device including driving circuits such as a video signal line driving circuit and a scanning signal line driving circuit, and to a driving circuit of a liquid crystal display device for improving display quality at the start of display and at the end of display. Background technique [0002] Conventionally, active matrix liquid crystal display devices employ a driving method in which liquid crystal capacitors and storage capacitors are used in combination. Below, based on Image 6 A block diagram illustrating a schematic configuration constituting a liquid crystal display device. [0003] As above Image 6 As shown, the above-mentioned liquid crystal display device 10 includes: a plurality of video signal lines 20, a plurality of scanning signal lines 22 orthogonal to these video signal lines 20, pixel TFTs (Thin Film Transistor: Thin Film Transistor) 30, a pixel electrode 40 connected to the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20
CPCG09G3/3648G09G3/3688G09G3/3696G09G2310/08G09G2310/0245G02F2001/13606G02F1/13606
Inventor 田中纪行
Owner SHARP KK