Liquid crystal display device and method for fabricating the same

1. A liquid crystal display device comprising:

a first substrate including:

(i) a plurality of thin film transistors arranged in a matrix shape;

(ii) an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection, wherein a slope of a first tangent of a curve in a first direction of said projection is higher than a slope of a second tangent of a curve in a second direction of said projection;

(iii) a plurality of first electrodes formed in a matrix shape on said organic insulating layer, each of said first electrodes having a portion that is connected with said output so as to receive a first electric power, and a rest portion that covers said projection, each said rest portion having an opening formed through each of said first electrodes corresponding to a display area to have various reflection factors depending on an observation angle; and

(iv) a viewing-angle varying section between the first electrodes, the viewing-angle varying section having a curved surface protruding from the organic insulating layer and having a symmetrical shape, and the rest portion of each of said plurality of first electrodes disposed at both sides of said viewing-angle varying section asymmetrically extends onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle;

a second substrate including i) a color filter disposed opposite to said first electrode and ii) a second electrode covering said color filter; and

a liquid crystal interposed between said first substrate and said second substrate.

2. The liquid crystal display device of claim 1 , wherein said viewing-angle varying section is formed in matrix configuration.

3. The liquid crystal display device of claim 2 , wherein said curved surface of said viewing-angle varying section faces said second substrate.

4. A liquid crystal display device comprising:

a first substrate including:

(i) a plurality of thin film transistors arranged in a matrix shape;

(ii) an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection;

(iii) a plurality of first electrodes having a transparent electrode, said transparent electrode which has a portion thereof connected with said output so as to apply a first electric power and a rest portion thereof covering said projection, and a reflection electrode supplied with electric power from said transparent electrode, said reflection electrode which has a first portion thereof opened to transmit a first light and a second portion thereof covering said transparent electrode formed on said projection to change a reflection factor of a second light passing in a different direction from said first light depending on an observation angle, wherein the first portion includes a plurality of projections; and

(iv) a viewing-angle varying section formed on the organic insulating layer, the viewing-angle varying section having a curved surface of a half-cylindrical shape, the curved surface located between two reflection electrodes and projected in a half-cylindrical shape;

a second substrate including i) a color filter disposed opposite to said first electrode and ii) a second electrode covering said color filter; and

a liquid crystal interposed between said first substrate and said second substrate,

wherein said viewing-angle varying section has a symmetrical shape, and a portion of each of said two reflection electrodes disposed at both sides of said viewing-angle varying section asymmetrically extends onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle.

5. The liquid crystal display device of claim 4 , wherein an opening is formed at a portion of said reflection electrode on said projection to have the various reflection factor depending on an observation angle.

6. The liquid crystal display device of claim 4 , wherein the curved surface of the viewing-angle varying section faces said second substrate.

7. The liquid crystal display device of claim 4 , wherein said viewing-angle varying section has an asymmetrical half-cylindrical shape.

8. The liquid crystal display device of claim 7 , wherein a portion of each of said two reflection electrodes disposed at both sides of said viewing-angle varying section extends onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle.

9. A method for fabricating a liquid crystal display device, the method comprising the steps of:

forming a first substrate by (i) forming a plurality of thin film transistors arranged in a matrix shape; (ii) forming an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection, wherein a slope of a first tangent of a curve in a first direction of said projection is higher than a slope of a second tangent of a curve in a second direction of said projection; (iii) forming a plurality of first electrodes formed in a matrix shape on said organic insulating layer, each of said first electrodes having a portion that is connected with said output so as to receive a first electric power, and a rest portion that covers said projection, each said rest portion having an opening formed through each of said first electrodes corresponding to a display area to have various reflection factors depending on an observation angle; and (iv) forming a viewing-angle varying section between the first electrodes, the viewing-angle varying section having a curved surface of a half-cylindrical shape and protruding from the organic insulating layer;

forming a second substrate including i) a color filter disposed opposite to the first electrode and ii) a second electrode covering the color filter; and

interposing a liquid crystal between the first substrate and the second substrate,

wherein said viewing-angle varying section has a symmetrical shape, and the rest portion of each of said first electrodes disposed at both sides of said viewing-angle varying section asymmetrically extends onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle.

10. A method for fabricating a liquid crystal display device, the method comprising the steps of:

forming a first substrate by (i) forming a plurality of thin film transistors arranged in a matrix shape; (ii) forming an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection; (iii) forming a plurality of first electrodes having a transparent electrode, said transparent electrode which has a portion thereof connected with said output so as to apply a first electric power and a rest portion thereof covering said projection, and a reflection electrode supplied with electric power from said transparent electrode, said reflection electrode which has a first portion thereof opened to transmit a first light and a second portion thereof covering said transparent electrode formed on said projection to change a reflection factor of a second light passing in a different direction from said first light depending on an observation angle, wherein the first portion includes a plurality of projections; and (iv) forming a viewing-angle varying section on the organic insulating layer, the viewing-angle varying section having a curved surface, the curved surface located between two reflection electrodes and projected in a half-cylindrical shape;

forming a second substrate including i) a color filter disposed opposite to said first electrode and ii) a second electrode covering said color filter; and

interposing a liquid crystal interposed between said first substrate and said second substrate,

wherein said viewing-angle varying section has a symmetrical shape, and a portion of each of said two reflection electrodes disposed at both sides of said viewing-angle varying section asymmetrically extends onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle.

11. A liquid crystal display device comprising:

a first substrate including:

(i) a plurality of thin film transistors arranged in a matrix shape;

(ii) an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection;

(iii) a plurality of first electrodes formed in a matrix shape on said organic insulating layer, each of said first electrodes having a portion that is connected with said output so as to receive a first electric power, and a rest portion that covers said projection to have various reflection factors depending on an observation angle, wherein an opening is formed at a portion of each of said first electrodes on each of said projections to have the various reflection factor depending on an observation angle; and

(iv) a viewing-angle varying section between the first electrodes, the viewing-angle varying section having a curved surface of a half-cylindrical shape and protruding from the organic insulating layer;

a second substrate including i) a color filter disposed opposite to said first electrode and ii) a second electrode covering said color filter; and

a liquid crystal interposed between said first substrate and said second substrate,

wherein said viewing-angle varying section has a symmetrical shape, and the portions of said first electrode disposed at each side of said viewing-angle varying section asymmetrically extend onto the curved surface of said viewing-angle varying section, to thereby change the reflection factor depending on an observation angle.

12. The liquid crystal display device of claim 11 , wherein said viewing-angle varying section is formed in matrix configuration.

13. The liquid crystal display device of claim 12 , wherein said curved surface of said viewing-angle varying section faces said second substrate.

14. A method for fabricating a liquid crystal display device, the method comprising the steps of:

forming a first substrate by (i) forming a plurality of thin film transistors arranged in a matrix shape; (ii) forming an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection that has at least one irregular reflection surface to selectively control light reflection; (iii) forming a plurality of first electrodes in a matrix shape formed on said organic insulating layer, each of said first electrodes having a portion that is connected with said output so as to receive a first electric power, and a rest portion that covers said projection to have various reflection factors depending on an observation angle, wherein an opening is formed at a portion of each of said first electrodes on each of said projections to have the various reflection factor depending on an observation angle; and (iv) a viewing-angle varying section between the first electrodes, the viewing-angle varying section having a curved surface and protruding from the organic insulating layer, the viewing-angle varying section having a symmetrical shape and the rest portion disposed at both sides of the viewing-angle varying section asymmetrically extends onto the curved surface of the viewing-angle varying section;

forming a second substrate including i) a color filter disposed opposite to the first electrode and ii) a second electrode covering the color filter; and

interposing a liquid crystal between the first substrate and the second substrate.

15. A liquid crystal display device comprising:

a first substrate including:

(i) a plurality of thin film transistors arranged in a matrix shape;

(ii) an organic insulating layer insulating said thin film transistors from each other, said organic insulating layer having a contact hole exposing an output of each of said thin film transistors and a projection;

(iii) a plurality of first electrodes formed on said organic insulating layer, each of said first electrodes having a portion that is connected with said output so as to receive a first electric power, and a rest portion that covers said projection; and

(iv) a viewing-angle varying section disposed between said first electrodes, the viewing-angle varying section having a curved surface and protruding from the organic insulating layer, the viewing-angle varying section having a symmetrical shape and the rest portion disposed at both sides of the viewing-angle varying section asymmetrically extends onto the curved surface of the viewing-angle varying section;

a second substrate including i) a color filter disposed opposite to said first electrode and ii) a second electrode covering said color filter; and

a liquid crystal interposed between said first substrate and said second substrate.