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Display device and driving method thereof, and information terminal device

一种液晶显示装置、驱动电路的技术，应用在辨认装置、静态指示器、仪器等方向，能够解决液晶面板映像品位低下等问题

Inactive Publication Date: 2005-04-20
JAPAN DISPLAY CENTRAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (4) Also, in the second prior art example, the pixel electrodes 155a, 155b, 155c, and 155d are driven by the pixel transistors Tr1, Tr2, Tr3, and Tr4 to perform gray scale display. The grayscale display of the pixel and the grayscale display of the adjacent unit pixel are combined to display a band-shaped shade on the display screen, and a fixed pattern (fixed pattern) can be seen, and the image quality of the LCD panel becomes low.

Method used

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  • Display device and driving method thereof, and information terminal device
  • Display device and driving method thereof, and information terminal device
  • Display device and driving method thereof, and information terminal device

Examples

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Embodiment Construction

[0121] (Embodiment 1)

[0122] figure 1 is a circuit diagram of a liquid crystal display device according to Embodiment 1 of the present invention, figure 2 It is a circuit diagram showing the configuration of a unit pixel. This liquid crystal display device is a digital drive method for displaying gray scales using digital image signals. The digital image signal is composed of 4-bit data and is an active matrix type liquid crystal display device capable of displaying 16 gray scales. we refer to figure 1 and figure 2 , to illustrate the specific composition. exist figure 1 Among them, 10 is a liquid crystal display part in which unit pixels 15 are arranged in a matrix, 11 is a scanning side driving circuit, 12 is a signal side driving circuit, 13 is a controller, and 31 is a circuit for supplying compensation voltage signals to the voltage control capacitor wiring 32. Drive circuit for adding compensation voltage.

[0123] In the liquid crystal display section 10, ...

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Abstract

An active matrix liquid crystal display device divides each unit pixel into a plurality of sub-pixels. Each sub-pixel has its own sub-pixel electrode, a pixel transistor connected to the sub-pixel electrode, and a voltage-controlled capacitor. A voltage control capacitor line for supplying a compensation voltage signal is connected to the voltage control capacitor, and after writing to the sub-pixel is completed, the potential of the compensation voltage signal is changed to modulate the potential of the sub-pixel electrode to a predetermined potential. In this way, grayscale display can be performed based on a digital image signal without providing a digital / analog conversion circuit, and power consumption can be reduced at the same time.

Description

technical field [0001] The present invention relates to a liquid crystal display device suitable for so-called portable devices, etc., an electroluminescent display device and a driving method thereof, and more particularly, to a liquid crystal display device for halftone display using an area gray scale method, an electroluminescent display device A device, a driving method thereof, and a method for evaluating a display pattern of a sub-pixel. The present invention also relates to an information terminal device. Background technique [0002] Figure 39 It is a circuit configuration diagram of a pixel of an active matrix liquid crystal display panel (hereinafter referred to as a first prior art example). exist Figure 39 Among them, SL is a signal line, GL is a scanning line, Tr is a pixel transistor, C is a storage capacitor, 155 is a pixel electrode, and 156 is a storage capacitor line. With such a configuration, when the gradation display method of the input image displ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1362G02F1/133G02F1/1368G09F9/00G09F9/30G09F9/35G09G3/20G09G3/30G09G3/32G09G3/36H01L27/32H01L51/50
CPCG09G3/2051G09G3/2059G09G3/2074G09G3/32G09G3/3614G09G3/3655G09G3/3659G09G2300/0443G09G2300/0456G09G2300/0876G09G2310/0224G09G2320/0219G09G2330/02G09G2330/021G02F1/134345G09G3/20
Inventor 千田耕司南野裕竹桥信逸
Owner JAPAN DISPLAY CENTRAL CO LTD
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