Color filter substrate, electrophoretic display device having the same, and method thereof
View Patent ↗A color filter substrate includes a base substrate, a white light-blocking part, and a color filter layer. The white light-blocking part is formed on the base substrate. The white light-blocking part divides the base substrate into a light-transmitting area and a light-blocking area. The color filter layer is formed in the light-transmitting area. Therefore, the white light-blocking part is formed so that a boundary of the pixel part is divided and a light-blocking function is realized. Furthermore, a white luminance characteristic is enhanced.
1. A color filter substrate comprising:
a base substrate;
a color filter layer formed in a light-transmitting area of the base substrate;
an electrophoretic layer disposed on the color filter layer, the electrophoretic layer comprising a plurality of electrophoretic particle; and
a white light-blocking part including a partition wall pattern comprising a white material and dividing the color filter substrate into a plurality of pixel spaces, each of the pixel spaces receiving the electrophoretic particles,
wherein the color filter layer comprises a plurality of color filter patterns formed on the pixel spaces, respectively, each of the color filter patterns is defined by the white light-blocking part.
2. The color filter substrate of claim 1 , further comprising a common electrode disposed between the base substrate and the electrophoretic layer, the common electrode comprising optically transparent and electrically conductive material.
3. The color filter substrate of claim 1 , wherein the white light-blocking part further includes a portion disposed between the base substrate and the partition wall pattern.
4. The color filter substrate of claim 3 , wherein the portion of the white light-blocking part between the base substrate and the partition wall pattern has a thin film shape.
5. The color filter substrate of claim 1 , wherein the partition wall pattern is white.
6. The color filter substrate of claim 1 , wherein the white light-blocking part comprises a metal oxide material including titanium oxide or aluminum oxide, or a polymer material including acrylic resin, polystyrene or polyester.
7. An electrophoretic display device comprising:
an array substrate comprising a plurality of pixel electrodes formed on a first base substrate;
a color filter substrate comprising a second base substrate and a color filter layer formed in a light-transmitting area of the second base substrate;
an electrophoretic layer interposed between the array substrate and the color filter substrate, the electrophoretic layer comprising a plurality of electrophoretic particles; and
a white light-blocking part including a partition wall pattern comprising a white material and dividing the electrophoretic display device into a plurality of pixel spaces, each of the pixel spaces receiving the electrophoretic particles,
wherein the color filter layer comprises a plurality of color filter patterns formed on the pixel spaces, respectively, each of the color filter patterns is defined by the white light-blocking part.
8. The electrophoretic display device of claim 7 , wherein the color filter substrate further comprises a common electrode disposed between the second base substrate and the electrophoretic layer, the common electrode comprising optically transparent and electrically conductive material.
9. The electrophoretic display device of claim 7 , wherein the electrophoretic layer comprises a plurality of microcapsules having electrophoretic particles.
10. The electrophoretic display device of claim 7 , wherein the white light-blocking part is formed on a region of the second base substrate corresponding to a region of the array substrate disposed between areas having the pixel electrodes formed thereon.
11. The electrophoretic display device of claim 7 , wherein the white light-blocking part further includes a portion disposed between the second base substrate and the partition wall pattern.
12. The electrophoretic display device of claim 7 , wherein the partition wall pattern is white.
13. The electrophoretic display device of claim 7 , wherein the white light-blocking part comprises a metal oxide material including titanium oxide or aluminum oxide, or a polymer material including acrylic resin, polystyrene or polyester.
14. The electrophoretic display device of claim 7 , wherein the first base substrate blocks light and reflects light.
15. The electrophoretic display device of claim 7 , wherein the array substrate further comprises a plurality of switching elements electrically connected to the plurality of pixel electrodes, respectively.
16. A method of enhancing a white luminance characteristic of an electrophoretic display device, comprising:
forming an array substrate having a plurality of pixel electrodes;
forming a color filter substrate;
forming a white light-blocking part including a partition wall pattern that comprises a white material, the partition wall pattern dividing the electrophoretic display device into a plurality of pixel spaces; and
forming an electrophoretic layer between the array substrate and the color filter substrate, the electrophoretic layer including a plurality of electrophoretic particles within the pixel spaces,
wherein the color filter layer comprises a plurality of color filter patterns formed on the pixel spaces, respectively, each of the color filter patterns is defined by the white light-blocking part.