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Liquid crystal display device and black matrix for liquid crystal display device

A liquid crystal display and black matrix technology, which is applied in the field of black matrix, can solve the problems of reducing the display quality of LCD devices, achieve the effects of improving light blocking characteristics, improving image quality, and reducing parasitic capacitance and its influence

Active Publication Date: 2006-07-05
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the display quality of prior art LCD devices is reduced

Method used

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  • Liquid crystal display device and black matrix for liquid crystal display device
  • Liquid crystal display device and black matrix for liquid crystal display device
  • Liquid crystal display device and black matrix for liquid crystal display device

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Embodiment Construction

[0037] Various preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] In an exemplary embodiment of the present invention, a black matrix for an LCD device is composed of a black resin including at least one of carbon particles coated with an insulating material, titanium particles, and pigment.

[0039] The parasitic capacitance between the black matrix and electrodes and wires adjacent to the black matrix is ​​reduced, and thereby preventing signal delays from being dependent on properties of the black matrix such as resistivity and permittivity. In particular, when an LCD device is driven by an alternating current (AC) voltage having a driving frequency of about 1 KHz to 100 KHz, the resistance property at the driving frequency, impedance, has more effective characteristics than resistivity. Therefore, in order to optimize the resistance of the black matrix, the black matrix may be composed of a b...

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Abstract

Disclosed is a black matrix for a liquid crystal display device (LCD) having an impedance about equal to or more than 105Omega, a specific resistance about equal to or more than 1011 Omegacm, and a relative dielectric constant about equal to or less than 20 at a driving frequency of about 1 kHz to 100 kHz. The black matrix as disclosed has dielectric properties that minimize parasitic capacitance between the black matrix and the circuitry of the LCD, thereby preventing a signal delay in charging pixel electrodes that degrades the LCD image.

Description

[0001] This application claims the benefit of Korean Patent Application No. 2004-0114303 filed December 28, 2004, which is incorporated herein by reference. technical field [0002] The invention relates to a liquid crystal display device, in particular to a liquid crystal display (LCD) device and a black matrix used in the liquid crystal display device. Background technique [0003] Flat panel display devices have begun to replace cathode ray tubes (CRTs) for display for information. Different types of flat panel displays such as liquid crystal display (LCD) devices, plasma display panels (PDP), field emission displays (FED), and electroluminescence displays (ELD) have been developed to replace CRTs. Among these flat panel displays, LCD The device offers advantages such as high resolution, light weight, thin profile, compact size, and low power requirements. [0004] Generally, an LCD device includes two substrates facing and spaced apart from each other, with a liquid cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/136G02F1/1335G02F1/133H01L29/786H01L21/027
CPCG02F1/136213G02F1/1362G02F1/133512G02F1/13439G02F1/1335
Inventor 朴承烈
Owner LG DISPLAY CO LTD
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