Electro-optical device

• US 20020033906A1
• Filed: 09/24/2001
• Published: 03/21/2002
• Est. Priority Date: 02/16/1991
• Status: Active Grant

• Current Assignee: Akira Mase, Masaaki Hiroki
• Original Assignee: Akira Mase, Masaaki Hiroki
• Inventors: Hiroki, Masaaki, Mase, Akira
• Granted Patent: US 7,646,441 B2
• Time in Patent Office: Days
• US Class Current: 349/43
• CPC Class Codes: G02F 1/1362 Active matrix addressed cells G02F1/134336, G02F1/134363 take precedence
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136245 having complementary transistors
• CPC Class Codes: G09G 2300/0823 used to establish symmetry in driving, e.g. with polarity inversion
• CPC Class Codes: G09G 2310/027 Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
• CPC Class Codes: G09G 3/2018 by time modulation using two or more time intervals
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3651 using multistable liquid crystals, e.g. ferroelectric liquid crystals
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 29/4908 for thin film semiconductor, e.g. gate of TFT
• CPC Class Codes: H01L 29/66757 Lateral single gate single channel transistors with non-inverted structure, i.e. the channel layer is formed before the gate
• CPC Class Codes: H01L 29/66765 Lateral single gate single channel transistors with inverted structure, i.e. the channel layer is formed after the gate
• CPC Class Codes: H01L 29/78618 characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure silicide contacts, electrodes in general H01L29/458
• CPC Class Codes: H04N 3/127 using liquid crystals

Abstract

An electro-optical device comprising a display drive system with the display timing related to the unit time t for writing-in a picture element and to the time F for writing-in one picture is disclosed. In the device, a gradated display corresponding to the ratio of the division can be obtained by time-sharing the signal during a write-in of time t without changing the time F.

Claims

1. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said first leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

a second leveling film formed over said black stripes; and

a common electrode formed on said second leveling film wherein said second substrate is disposed so that said common electrode is opposed to said pixel electrode with a gap therebetween.

14. The electro-optical display device according to any one of claims 1 to 11 wherein said thin film transistor is top-gate type.

15. The electro-optical device according to any one of claims 1 to 11 wherein said pixel electrode is transparent.

16. The electro-optical display device according to claim 1, 2, 7, or 8 wherein said common electrode is transparent.

17. The electro-optical display device according to any one of claim 1, 3, 4, 6, 7, 9, 10 or 11 wherein said black stripes comprises polyimide.

18. The electro-optical display device according to any one of claims 1 to 11 wherein said display device is a television.

19. The electro-optical display device according to any one of claims 1 to 11 further comprising a liquid crystal between said first and second substrates.

20. The electro-optical device according to claim 1, 2, 3, 4, 5, or 6 wherein said second leveling film comprises polyimide.

2. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

color filters formed over a second substrate;

a second leveling film formed over said color filters; and

a common electrode formed on said second leveling film wherein said second substrate is disposed so that said common electrode is opposed to said pixel electrode with a gap therebetween.

3. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said first leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

color filters formed over said second substrate wherein said black stripes are disposed between said color filters; and

a second leveling film formed over said black stripes and said color filters wherein said second substrate is opposed to said first substrate with said second leveling film located therebetween.

12. The electro-optical display device according to claim 3, 4, 5, or 6 further comprising a common electrode formed on said second leveling film.

4. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

an interlayer insulating film formed over said thin film transistor;

an electrode formed on said interlayer insulating film and electrically connected to one of said source and drain regions;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said first leveling film and electrically connected to the other one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

a second leveling film formed over said black stripes wherein said second substrate is opposed to said first substrate with said second leveling film located therebetween.

5. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

an interlayer insulating film formed over said thin film transistor;

an electrode formed on said interlayer insulating film and electrically connected to one of said source and drain regions;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said first leveling film and electrically connected to the other one of said source and drain regions of the thin film transistor;

color filters formed over a second substrate;

a second leveling film formed over said color filters wherein said second substrate is opposed to said first substrate with said second leveling film located therebetween.

6. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

an interlayer insulating film formed over said thin film transistor;

an electrode formed on said interlayer insulating film and electrically connected to one of said source and drain regions;

a first leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said first leveling film and electrically connected to the other one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

color filters formed over said second substrate wherein said black stripes are disposed in gaps between adjacent color filters;

a second leveling film formed over said black stripes and said color filters wherein said second substrate is opposed to said first substrate with said second leveling film located therebetween.

7. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

a common electrode formed over said black stripes wherein said second substrate is disposed so that said common electrode is opposed to said pixel electrode with a gap therebetween.

8. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

color filters formed over a second substrate; and

a common electrode formed over said color filters wherein said second substrate is disposed so that said common electrode is opposed to said pixel electrode with a gap therebetween.

9. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

a leveling film comprising an organic resin formed over said at least one thin film transistor;

a pixel electrode formed over said leveling film and electrically connected to one of said source and drain regions of the thin film transistor;

black stripes comprising a resin formed over a second substrate;

color filters formed over said second substrate wherein said black stripes are disposed between said color filters wherein said second substrate is opposed to said first substrate with said color filters located therebetween.

10. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

an interlayer insulating film formed over said thin film transistor;

a pixel electrode formed over said interlayer insulating film and electrically connected to one of said source and drain regions of the thin film transistor;

a second substrate opposed to said first substrate;

black stripes comprising a resin formed over a second substrate;

a leveling film formed over said black stripes.

13. The electro-optical display device according to claim 10 or 11 further comprising a common electrode formed on said leveling film wherein said common electrode is opposed to said pixel electrode.

21. The electro-optical device according to claim 10 or 11 wherein said leveling film comprises polyimide.

23. The electro-optical display device according to claim 10 further comprising a common electrode opposed to said pixel electrode.

11. An electro-optical display device comprising:

a first substrate having an insulating surface;

at least one thin film transistor formed over said first substrate, said thin film transistor comprising a channel region, source and drain regions with said channel region extending therebetween, a gate insulating film adjacent to said channel region, and a gate electrode adjacent to said gate insulating film;

an interlayer insulating film formed over said thin film transistor;

a pixel electrode formed over said interlayer insulating film and electrically connected to one of said source and drain regions of the thin film transistor;

a second substrate opposed to said first substrate;

color filters formed over said second substrate;

black stripes comprising a resin formed over a second substrate wherein said black stripes are disposed between said color filters;

a leveling film formed over said black stripes and said color filters.

22. The electro-optical display device according to claim 2, 3, 5, 6, 8, 9 or 11 wherein said color filters comprises polyimide containing pigments.