Reflective type liquid crystal display device and fabricating method thereof
View Patent ↗The present invention provides a reflective type liquid crystal display device and fabricating method thereof, by which resolution is enhanced in a manner of representing two colors from one sub-pixel. The present invention includes a first substrate having a plurality of thin film transistors and a plurality of pixel electrodes within a plurality of sub-pixels defined by a plurality of gate and data lines perpendicularly crossing with each other, respectively, a second substrate assembled to the first substrate to confront, a liquid crystal layer between the first and second substrates, a third substrate assembled to the first substrate to confront, a plurality of reflective electrodes on an inside of the third substrate to correspond to a plurality of the sub-pixels, respectively, and a color filter layer having a plurality of electrophoretic bodies on a plurality of the reflective electrodes wherein each of the electrophoretic bodies is micro-encapsulated with ionic pigment particles.
1. A method of fabricating a reflective type liquid crystal display device, comprising the steps of:
forming a plurality of gate and data line on a first substrate to define a plurality of sub-pixels;
forming a plurality of thin film transistors at a plurality of crossings of a plurality of the gate and data lines;
forming a plurality of pixel electrodes connected to a plurality of the thin film transistors, respectively;
assembling a second substrate to oppose the first substrate;
forming a liquid crystal layer between the first and second substrates;
forming a plurality of reflective electrodes on a third substrate to correspond to a plurality of the sub-pixels, respectively;
forming a counter electrode directly on the first substrate and facing the third substrate;
forming a color filter layer on the plurality of reflective electrodes comprising a plurality of electrophoretic bodies wherein each of the electrophoretic bodies is micro-encapsulated with ionic pigment particles, wherein each electrophoretic body has two pigment particles among R, G and B pigment particles, and the color filter layer is formed between the first substrate and the third substrate; and
assembling the third substrate to the first substrate to confront.
2. The method of claim 1 , wherein each of the electrophoretic bodies is colored by differently-colored pigment particles to be encapsulated with oppositely charged ionic substances.
3. The method of claim 1 , wherein a plurality of the electrophoretic bodies is formed by methods of spin coating, dipping, dispensing, printing, ink jet, and screen coating.
4. The method of claim 1 , wherein each of the reflective electrodes has a size corresponding to that of each of sub-pixels or to that of each unit pixel line.
5. The method of claim 4 , wherein a positive or negative voltage is applied to each of the reflective electrodes.
6. The method of claim 4 , wherein each of the electrophoretic bodies is formed on each of the reflective electrodes by encapsulating at least two of R, G, and B pigment particles.
7. The method of claim 1 , further comprising the step of forming a partition wall between a plurality of the reflective electrodes.
8. The method of claim 1 , wherein a plurality of the reflective electrodes is formed a low resistance metal layer.
9. The method of claim 1 , wherein each of the pixel electrodes is formed of a transparent conductive material.
10. The method of claim 1 , wherein the third substrate is assembled to the first substrate by pressurizing.
11. The method of claim 1 , further comprising:
forming a black matrix and a common electrode on an inside of the second substrate.