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Active matrix type display device and method for driving the same

An active matrix and display device technology, applied in static indicators, nonlinear optics, instruments, etc., can solve problems such as display unevenness, and achieve the effect of reducing display unevenness

Inactive Publication Date: 2008-09-24
CASIO COMPUTER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] In the method disclosed in the aforementioned JP-A-2004-185006, it is impossible to deal with the problem of display unevenness caused by the potential variation in the pixel written earlier due to the inter-pixel parasitic capacitance 104.

Method used

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  • Active matrix type display device and method for driving the same
  • Active matrix type display device and method for driving the same
  • Active matrix type display device and method for driving the same

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no. 1 Embodiment

[0100] Figure 1A It is a schematic diagram showing the overall structure of the active matrix display device of the first embodiment of the present invention, Figure 1B for Figure 1A A schematic diagram of the pixel connection of the LCD panel in ;

[0101] That is, the active matrix type display device of this embodiment is like Figure 1A As shown, it is composed of a panel 10 provided with a plurality of pixel LCDs, a drive circuit 12 for driving and controlling each pixel of the LCD panel 10 , and a Vcom circuit 14 for applying a common voltage Vcom to the LCD panel 10 .

[0102] LCD panel 10 images Figure 1B As shown, a plurality of pixels are arranged in a matrix. In addition, a plurality of source lines S1 to S480 and a plurality of gate lines X1 to X480 are arranged to cross each other. In addition, each pixel is connected to one of the source lines and one of the gate lines through the TFT 18 which is a switching element. Here, each pixel is provided so that...

no. 2 Embodiment

[0146] Next, a second embodiment of the present invention will be described.

[0147] In this embodiment, the potential variation Vc caused by the inter-pixel parasitic capacitance Cpp is added to the previously written pixel potential and written, thereby canceling the potential variation Vc caused by the inter-pixel parasitic capacitance Cpp, and eliminating display failure. uniform.

[0148] Here, a case where the potential variation is corrected using the gamma circuit module 30 of the drive circuit 12 will be described. In addition, the case of a still image in which unevenness tends to be conspicuous will be described.

[0149] As shown in FIG. 2 , the drive circuit 12 has a gamma circuit block 30 . Figure 5 It is a diagram showing the circuit configuration of the gamma circuit module 30 . As shown in the figure, the gamma circuit module 30 is composed of a gamma curve resistor 38 and a tap switch (hereinafter referred to as TAPSW) 40 . For the gamma curve resistor 3...

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Abstract

The invention relates to an active matrix type display device which arranges one signal line according to each two pixels for a stipulated direction, and holds the two pixels of the signal line in the stipulated direction, and shares the signal line, and separately connects different scanning lines via a switch element. The display device comprises a scanning line driving circuit selecting a plurality of the scanning lines in turn, and a signal line driving circuit outputting signals corresponding with information which should be displayed. Moreover, the scanning line driving circuit selects different signal lines to connect and after the two scanning lines corresponding with the two pixels adjacency arranged in the stipulated direction, at the same time only selects one scanning line corresponding with the pixel which should be behind selected in the two pixels.

Description

technical field [0001] The present invention relates to an active matrix display device and a driving method of a type in which one signal line is shared by two adjacent pixels. Background technique [0002] In recent years, active matrix display devices using thin film transistors (TFTs) as switching elements are being developed. [0003] This active matrix display device has a scanning line driver circuit (hereinafter referred to as a gate driver) that generates a scanning signal for sequentially scanning a plurality of pixels arranged in a matrix for each row. The operating frequency of the gate driver is lower than that of a signal line driver circuit (hereinafter referred to as a source driver) that supplies video signals to the above-mentioned pixels. Therefore, even if the TFT and the gate driver are formed at the same time in the same process as the process for forming the TFT corresponding to each pixel, the gate driver can satisfy the standard. [0004] In additi...

Claims

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Application Information

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IPC IPC(8): G09G3/20G09G3/36G02F1/133
CPCG09G3/3648G09G3/3614G09G3/3677G09G3/3696G09G2300/0426G09G2310/027G09G2310/0278G09G2320/0209G09G2320/0233G09G2320/0276G09G2320/0673G02F1/133G09G3/20G09G3/36
Inventor 平山隆一
Owner CASIO COMPUTER CO LTD
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