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Liquid crystal display device, its control method thereof and mobile terminal

A technology of liquid crystal display device and display unit, which can be applied to static indicators, instruments, etc., and can solve the problems that hinder the reduction of size and cost

Inactive Publication Date: 2009-09-16
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 processes involved in placing the external substrate 105, and mounting the timing generator 106, VCOM driver 107, and CS driver 108 thereon.

Method used

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

Examples

Experimental program
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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 capable of reducing overall system size and cost, starts displaying images without image distortion when the power is turned on, and erases the display without generating residual images when the power is turned off. Also disclosed are a method of controlling the liquid crystal display device, and a mobile terminal using the liquid crystal display device as a screen display unit. On the glass substrate (11) of the display unit (12), provide a horizontal driver (16) and a vertical driver (17) and such as interface circuit (13), timing generator (14), reference voltage driver (15) , a CS driver (18), a VCOM driver (19) and a peripheral drive circuit of a voltage stabilizing circuit (20). When the display reset control pulse PCI is applied from the outside, a predetermined voltage is written into the pixel, and at the same time, the CS voltage and the VCOM voltage are adjusted to have the same level as the pixel voltage. The same potential is supplied to the opposite electrodes so that white display is performed in a normally white mode and black display is performed in a normally black mode, thereby preventing image distortion 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 normally white mode (white type) LCDs during power-on / off times, "white" data is written into pixels during power-on / off times to make the screen white. In the case of a normally black mode LCD, "black" data is written into the pixels at power on / off time to make the screen black. More specifically, at power-on time, the screen is first turned white (or black), so that the subsequently displayed image...

Claims

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Application Information

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