Color filter with optical transmissive step-forming layer and its manufacturing method, and a liquid crystal display device using the color filter
View Patent ↗An object of the invention is to accurately and easily manufacture a color filter. A method of manufacturing a color filter comprises: a first step of forming a first rib ( 220 ) forming a light shield layer and a second rib ( 230 ) having a smaller height than the first rib ( 220 ) in pattern on a base layer ( 1 ) by means of a photolithography method; a second step of forming a step-forming layer ( 4 ) by dripping an optical transmissive material into an area defined by the first and second ribs ( 220, 230 ) by means of ink-jet technique; and a third step of forming a coloring layer by dripping an optical coloring material ( 5 ) into an area defined by the first rib ( 220 ) by means of ink-jet technique after forming the step-forming layer ( 4 ).
1. A color filter comprising:
an optically transmissive base layer;
a first part and a second part provided on the base layer in pattern, the first part forming a pixel boundary, the second part having a smaller height than the first part, wherein the first part is a first rib and the second part is a second rib provided on the base layer in pattern, the second rib having a smaller height than the first rib;
an optically transmissive step-forming layer formed in an area defined by the first and second ribs;
a coloring layer formed in an area defined by the first rib; and
corresponding light shield layers formed under the first and second ribs.
2. A liquid crystal display device, comprising:
the color filter of claim 1 provided on one substrate of the liquid crystal display device; and
a substrate provided with pixel electrodes comprising a transmissive electrode part and a reflective electrode part,
wherein an area of the step-forming layer in the color filter is aligned with the reflective electrode part and another area in the color filter is aligned with the transmissive electrode part.
3. A color filter comprising:
an optically transmissive base layer;
a first part and a second part provided on the base layer in pattern, the first part forming a pixel boundary, the second part having a smaller height than the first part, wherein the first and second parts are made of same material;
an optically transmissive step-forming layer formed in an area defined by the first and second parts; and
a coloring layer formed in an area defined by the first part, wherein the coloring layer covers a top surface of the second part.
4. A liquid crystal display device, comprising:
the color filter of claim 3 provided on one substrate of the liquid crystal display device; and
a substrate provided with pixel electrodes comprising a transmissive electrode part and a reflective electrode part,
wherein an area of the step-forming layer in the color filter is aligned with the reflective electrode part and another area in the color filter is aligned with the transmissive electrode part.
5. A color filter as defined in claim 3 , wherein the material of the first and second parts comprises a photosensitive material.
6. A color filter as defined in claim 3 , wherein the material of the first and second parts comprises a photoresist material.
7. A color filter as defined in claim 6 , wherein the photoresist material is a color resist material.
8. A color filter as defined in claim 3 , wherein a first region and a second region are defined on either side of the second part within the area defined by the first part, wherein the first region is defined between the first part and a first side of the second part, and the second region is defined between the first part and a second side of the second part, and wherein the first region corresponds to the area defined by the first and second parts.
9. A color filter as defined in claim 8 , wherein the optically transmissive step-forming layer comprises a transparent material formed in the first region.
10. A color filter as defined in claim 9 , wherein the coloring layer extends to cover the transparent material in the first region, the second part and the second region within the area defined by the first part.
11. A color filter as defined in claim 10 , wherein the first part is a first rib and the second part is a second rib provided on the base layer in pattern.
12. A color filter as defined in claim 3 , wherein the first and second parts are contiguous.
13. A color filter as defined in claim 3 , wherein corresponding light shield layers are formed under the first and second parts.
14. A color filter comprising:
a base layer;
a first part and a second part provided on the base layer in pattern, wherein:
the second part having a smaller height than the first portion,
the first part defines an area having the second part therein,
a first region and a second region are defined on either side of the second part within the area defined by the first part, wherein the first region is defined between the first part and a first side of the second part, and the second region is defined between the first part and a second side of the second part;
an optically transmissive step-forming layer formed in the first region; and
a coloring layer formed in the area defined by the first part, wherein the coloring layer covers a top surface of the second part.
15. A liquid crystal display device, comprising:
the color filter of claim 14 provided on one substrate of the liquid crystal display device; and
a substrate provided with pixel electrodes comprising a transmissive electrode part and a reflective electrode part,
wherein an area of the step-forming layer in the color filter is aligned with the reflective electrode part and another area in the color filter is aligned with the transmissive electrode part.
16. A color filter as defined in claim 14 , wherein the optically transmissive step-forming layer comprises a transparent material formed in the first region.
17. A color filter as defined in claim 16 , wherein the coloring layer extends to cover the transparent material in the first region, the second part and the second region within the area defined by the first part.
18. A color filter as defined in claim 14 , wherein the first part is a first rib and the second part is a second rib provided on the base layer in pattern.
19. A color filter as defined in claim 14 , wherein the first and second parts are contiguous.
20. A color filter as defined in claim 14 , wherein the first and second parts are made of same material.