Method for fabricating a liquid crystal display device having cholesteric liquid crystal color filter layer with high aperture ration

1. A fabricating method of a substrate for a liquid crystal display device, comprising:

coating a first cholesteric liquid crystal material on a substrate to form a first cholesteric liquid crystal layer, the substrate having a plurality of sub-pixel regions;

disposing a first mask having a plurality of first open portions over the first cholesteric liquid crystal layer;

irradiating the first cholesteric liquid crystal layer through the open portions of the first mask;

curing the first cholesteric liquid crystal layer to form a first cholesteric liquid crystal color filter layer;

coating a second cholesteric liquid crystal material on the first cholesteric liquid crystal color filter layer to form a second cholesteric liquid crystal layer;

disposing a second mask having a plurality of second open portions over the second cholesteric liquid crystal layer;

irradiating the second cholesteric liquid crystal layer through the open portions of the second mask; and

curing the second cholesteric liquid crystal layer to form a second cholesteric liquid crystal color filter layer,

wherein each of the first and second open portions is smaller than each sub-pixel region.

2. The method according to claim 1 , wherein the first mask and the second mask are the same mask.

3. The method according to claim 1 , wherein the plurality of sub-pixel regions include red sub-pixel regions, green sub-pixel regions and blue sub-pixel regions.

4. The method according to claim 3 , wherein the first and second cholesteric liquid crystal color filter layers in the red sub-pixel regions reflect green and blue colored lights, respectively, wherein the first and second cholesteric liquid crystal color filter layers in the green sub-pixel regions reflect blue and red colored lights, respectively, wherein the first and second cholesteric liquid crystal color filter layers in the blue sub-pixel regions reflect red and green colored lights, respectively.

5. A fabricating method of a liquid crystal display device, comprising:

coating a first cholesteric liquid crystal material on a substrate to form a first cholesteric liquid crystal layer, the substrate having a plurality of sub-pixel regions;

disposing a first mask having a plurality of first open portions over the first cholesteric liquid crystal layer;

irradiating the first cholesteric liquid crystal layer through the open portions the first mask;

curing the first cholesteric liquid crystal layer to form a first cholesteric liquid crystal color filter layer;

coating a second cholesteric liquid crystal material on the first cholesteric liquid crystal color filter layer to form a second cholesteric liquid crystal layer;

disposing a second mask having a plurality of second open portions over the second cholesteric liquid crystal layer;

irradiating the second cholesteric liquid crystal layer through the open portions of the second mask;

curing the second cholesteric liquid crystal layer to form a second cholesteric liquid crystal color filter layer;

forming a common electrode on the second cholesteric liquid crystal color filter layer;

forming a gate line on a second substrate;

forming a data line crossing the gate line;

forming a switching device connected to the gate line and data line;

forming a passivation layer on the switching device;

forming a pixel electrode on the passivation layer;

attaching the first and second substrates such that the common electrode faces the pixel electrode; and

forming a liquid crystal layer between the common electrode and the pixel electrode, wherein each of the first and second open portions is smaller than each sub-pixel region.

6. The method of claim 5 , wherein the first mask and the second mask are the same mask.

7. The method of claim 5 , further comprising forming a black matrix on the data line.