Color liquid-crystal display device
AssigneeNEC Corporation
InventorKoji Kashimoto
Life of this patent
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Abstract
A color LCD device is capable of preventing the leakage of an internal light irradiated from a back light without the problems relating to the fabrication cost and the cell-gap control. This device has a black matrix located and a light-shielding layer formed on a back surface of a color-filter substrate. The black matrix is located in a display area of the substrate. The light-shielding layer is located in a light-shielding area of the substrate. The black matrix is formed by a first part of a black layer located in the display area. The light-shielding layer is formed by a second part of the same layer located in the light-shielding area. At least one of red, green, and blue color-filter layers is formed as a continuous layer on substantially all of the light-shielding layer.
Claims8
A color LCD device comprising:
- (a) a first substrate having a front surface and a back surface;
- (b) pixel electrodes formed on the front surface of said first substrate;
- (c) a second substrate having a front surface and a back surface;
- said second substrate being coupled with said first substrate in such a way that the front surface of said second substrate is opposite to the back surface of said first substrate to be apart from said first substrate, thereby forming a space therebetween;
- said space being sealed by a sealing material;
- (d) spacers for keeping a gap between the front surface of said second substrate and the back surface of said first substrate at a specific value;
- said spacers being located in said space;
- (e) a black matrix formed on the back surface of said second substrate in a display area of said second substrate;
- said black matrix being formed by a part of a black layer;
- said black matrix having windows exposing the back surface of said second substrate;
- (f) a patterned light-shielding layer formed on the back surface of said second substrate in a light-shielding area of said second substrate;
- said light-shielding layer being formed by another part of said black layer;
- (g) R-, G-, and B-colored filter layers selectively formed on the exposed back surface of said second substrate in said corresponding windows;
- (h) a back light fixed on the side of the back surface of said first substrate;
- said back light serves to emit inner light toward said space through said first substrate;
- wherein at least one of said R-, G-, and B-colored color-filter layers also forms a continuous layer on substantially all of said light-shielding layer in the light-shielding area to surround the display area and to suppress the leakage of said inner light.
Dependencies are inferred from the claim text.