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Liquid crystal display device, method thereof, and mobile terminal

A technology of liquid crystal display device and display unit, applied in the direction of static indicator, instrument, etc., can solve problems such as hindering the reduction of size and cost

Inactive Publication Date: 2004-11-17
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Size and cost reductions associated with the overall system are hampered by the inclusion of measures to place the external substrate 105, and mount the timing generator 106, VCOM driver 107, and CS driver 108 thereon.

Method used

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  • Liquid crystal display device, method thereof, and mobile terminal
  • Liquid crystal display device, method thereof, and mobile terminal
  • Liquid crystal display device, method thereof, and mobile terminal

Examples

Experimental program
Comparison scheme
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no. 1 example

[0020] figure 1 is a block diagram of a liquid crystal display device according to a first embodiment of the present invention. exist figure 1 In this, a display unit (pixel region) 12 having a plurality of pixels arranged in a matrix is ​​formed on a transparent insulating substrate such as a glass substrate 11 . The glass substrate 11 is opposed to another glass substrate with a predetermined distance therebetween. A liquid crystal material is placed between the two glass substrates to form a display panel (LCD panel).

[0021] figure 2 One example of the pixel structure in the display unit 12 is shown. Each pixel 50 arranged in a matrix includes: a thin film transistor (TFT) 51 as a pixel transistor, a liquid crystal element 52 , and a storage capacitor 53 . The drain of the TFT 51 is connected to the pixel electrode of the liquid crystal element 52 and is connected to one electrode of the storage capacitor 53 . The liquid crystal element 52 functions as a liquid c...

no. 2 example

[0050] Figure 5 is a block diagram of a liquid crystal display device according to a second embodiment of the present invention. and figure 1 Those components that are the same are identified by the same numerals.

[0051] The liquid crystal display device according to the first embodiment has the VCOM adjustment circuit 22 disposed entirely outside the panel (outside the glass substrate 11). In contrast, the liquid crystal display device according to this embodiment has a VCOM adjustment circuit 22' including some circuit elements disposed over the glass substrate 11.

[0052] Specifically, such as Figure 5As shown in , the capacitor C that is not simply placed on the glass substrate 11 and the variable resistor VR that requires external adjustment are both placed outside the glass substrate 11 . The variable resistor VR is connected to the output terminal of the capacitor C and ground. The glass substrate 11 has a voltage divider R11 and a switch SW connected in seri...

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PUM

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Abstract

A liquid crystal display device and its control method capable of reducing the entire system size and cost, starting display of an image without disorder when power is turned ON and erasing the display without a residual image when power is turned OFF. A mobile terminal using the liquid crystal display device as a screen display unit is also disclosed. On a glass substrate (11) of the display unit (12), there are provided a horizontal driver (16) and a vertical driver (17) as well as peripheral drive circuits such as an interface circuit (13), a timing generator (14), a reference voltage driver (15), a CS driver (18), a VCOM driver (19), and a potential setting circuit (20). When a display reset control pulse PCI is supplied from outside, a predetermined potential is written to pixels and simultaneously with this, the CS potential and the VCOM potential are set to the same potential as the pixel potential. The same potential is supplied to an opposing electrode, so that white display is performed in the normally white type and black display is performed in the normally black type, thereby preventing image disorder when power is turned ON and OFF.

Description

technical field [0001] The present invention relates to a liquid crystal display device, a method for controlling the device, and a mobile terminal. In particular, the present invention relates to a liquid crystal display device in which a display unit and a peripheral driving circuit are integrated on the same transparent insulating substrate, a method of controlling the liquid crystal display device at power-on / off time, and embodying the liquid crystal display device as Screen display of mobile terminal. Background technique [0002] In order to prevent image distortion in a conventional white type liquid crystal display at power on / off time, "white" data is written into pixels at power on / off time to make the screen white. In the case of a conventional black type liquid crystal display, "black" data is written into pixels at power on / off time to make the screen black. More specifically, at the time of power supply, image distortion is first eliminated by making the scr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/20G09G3/36
CPCG09G2330/026G09G2320/0204G09G3/3648G09G3/3688G09G2330/027G09G2320/0257G09G2310/027G09G3/3655G09G2310/06G09G2320/0219G09G2310/0245G09G2310/063G09G2300/0876G09G3/36
Inventor 木田芳利仲岛义晴前川敏一
Owner JAPAN DISPLAY INC