Liquid crystal display device and fabrication method thereof

1. A liquid crystal display device, comprising:

a first substrate and a second substrate;

gate lines and data lines being perpendicular to the gate lines on the first substrate to define a plurality of pixel regions;

a thin film transistor at each pixel region, the pixel region including a gate electrode on the first substrate, agate insulating layer on the gate electrode, a semiconductor layer on the gate insulating layer, and a source electrode and a drain electrode on the semiconductor layer;

a passivation layer over the first substrate having the thin film transistors;

a fluorescent color filter responding to a first light to emit a second light, wherein the fluorescent color filter is on the passivation layer of the first substrate;

an intra-cell polarizer on the fluorescent color filter;

a black matrix on the passivation layer over the thin film transistors;

a pixel electrode over the fluorescent color filter; and

a liquid crystal layer between the first and the second substrates,.

wherein the whole area of the black matrix on the passivation layer is disposed over a part of the semiconductor layer and the black matrix is directly contacted with the intra-cell polarizer.

2. The device of claim 1 , further comprising:

a light source providing ultraviolet rays to the liquid crystal layer.

3. The device of claim 2 , wherein the light source includes a ultraviolet light lamp.

4. The device of claim 3 , wherein the ultraviolet light lamp includes:

a glass tube;

a pair of electrodes at the both sides of the glass tube; and

emitting material for emitting the ultraviolet light in the glass tube.

5. The device of claim 1 . wherein the fluorescent color filter includes a material absorbing ultraviolet rays and emitting visible rays.

6. The device of claim 5 , wherein the visible rays includes at least one color of red, green and blue colors.

7. The device of claim 1 , wherein the fluorescent color filter is within the pixel region.

8. A method for fabricating a liquid crystal display device comprising:

preparing first and second substrates;

forming gate lines and data lines crossing each other on the first substrate to define a plurality of pixel regions;

forming a thin film transistor at each pixel region;

forming a passivation layer over the first substrate to cover the thin film transistor;

depositing a self-fluorescent material on the passivation layer of the first substrate to form a fluorescent color filter, the self-fluorescent material emitting visible light in responding to ultraviolet rays;

forming a black matrix on the passivation layer over the thin film transistors;

forming an intra-cell polarizer on the fluorescent color filter; and

forming a liquid crystal layer between the first and second substrates,

wherein the whole area of the black matrix on the passivation layer is disposed over a part of the semiconductor layer and the black matrix is directly contacted with the intra-cell polarizer.

9. The method of claim 8 , wherein forming the thin film transistor comprises:

forming a gate electrode, an active layer, a source electrode and a drain electrode at each crossing of the gate lines and data lines.

10. The method of claim 8 , wherein the intra-cell polarizer is formed by coating or printing process.