Liquid crystal display device and black matrix for liquid crystal display device
AssigneeLG Display Co., Ltd.
InventorSeung-Ryull Park
Life of this patent
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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 105Ω, a specific resistance about equal to or more than 1011 Ωcm, 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.
Claims20
A liquid crystal display device, comprising:
- a first substrate;
- a second substrate substantially parallel to the first substrate;
- a plurality of gate and data lines crossing each other on the first substrate and defining a pixel region;
- a thin film transistor near a crossing portion of the gate and data lines;
- a color filter pattern corresponding to the pixel region;
- a pixel electrode corresponding to the pixel region;
- and
- a black matrix disposed on the thin film transistor, the black matrix having an impedance equal to about 105Ω or more, a specific resistance equal to about 1011 Ωcm or more, and a relative dielectric constant equal to about 20 or less at a driving frequency between about 1 kHz and 100 kHz.
A method of fabricating a liquid crystal display device, comprising:
- providing a first substrate;
- providing a second substrate;
- forming a plurality of gate and data lines crossing each other on the first substrate and defining a pixel region;
- forming a thin film transistor near a crossing portion of the gate and data lines;
- forming a color filter pattern corresponding to the pixel region;
- forming a pixel electrode corresponding to the pixel region;
- and
- forming a black matrix disposed on the thin film transistor, the black matrix having an impedance equal to about 105Ω or more, a specific resistance equal to about 1011 Ωcm or more, and a relative dielectric constant equal to about 20 or less at a driving frequency between about 1 kHz and 100 kHz.
Dependencies are inferred from the claim text.