Claims
- 1. A liquid crystal display unit comprising:
- two insulating substrates;
- a liquid crystal layer sandwiched between said two insulating substrates;
- a plurality of pixels arranged in a matrix;
- at least two subpixels in each pixel; and
- means for applying voltage to a liquid crystal layer of each subpixel; wherein voltage applied to a liquid crystal layer of one subpixel is different from voltage applied to a liquid crystal layer of another subpixel; and wherein a ratio of display area between said subpixels and a difference in driving voltage of said subpixels are controlled so that the correlation between quantity of light and signaling voltage is monotonously falling or monotonously rising; said pixel being observed at an angle of 0.degree.-40.degree. inclined from an axis perpendicular to said insulating substrates along a long axis of liquid crystal molecules positioned in a middle layer of said liquid crystal layer with no application of voltage.
- 2. The liquid crystal display unit of claim 1, wherein the pixel comprises two subpixels.
- 3. The liquid crystal display unit of claim 2, wherein the two subpixels have different driving voltages; wherein a difference in driving voltages (.DELTA.V) being expressed as follows:
- -0.2V<-.DELTA.V<0.8V;
- .gamma.=.vertline.V10-V 90.vertline.;
- and
- .DELTA.V=.vertline.V50'-V50.vertline.;
- where V10, V50 and V90 are signaling voltages so as to set quantities of light for one subpixel, which is driven applying high voltage, at 90%, 50% and 10% relative to a maximum quantity of light, and V50' is a signaling voltage so as to set a quantity of light of another subpixel, which is driven applying low voltage, at 50% relative to a maximum quantity of light.
- 4. The liquid crystal display unit of claim 3, wherein the two subpixels have from 8:2 to 6:4 ratios of display areas; said ratios of display areas being ratios of a display area of one of said subpixels relative to a display area of another subpixel.
- 5. A liquid crystal display unit comprising:
- two insulating substrates;
- a liquid crystal layer sandwiched between said two insulating substrates;
- a polarizing plate on an exterior surface of each insulating substrate so as to set a polarizing axis of one polarizing plate at right angles to a polarizing axis of another polarizing plate;
- a plurality of pixels arranged in a matrix;
- at least two subpixels in each pixel; and
- means for controlling voltage applied to each subpixel;
- wherein voltage applied to one subpixel is different from voltage applied to another subpixel; and wherein 0.degree..ltoreq..phi..ltoreq.450.degree. where (is an angle between a long axis of liquid crystal molecules when viewed from a direction perpendicular to said two insulating substrates and a boundary between said subpixels with no application of voltage.
- 6. The liquid crystal display unit of claim 5, further comprising a thin-film transistor and a control capacitor on one of the insulating substrates.
Priority Claims (4)
Number |
Date |
Country |
Kind |
6-118828 |
May 1994 |
JPX |
|
6-299595 |
Dec 1994 |
JPX |
|
6-320277 |
Dec 1994 |
JPX |
|
7-012138 |
Jan 1995 |
JPX |
|
Parent Case Info
This application is a divisional of U.S. application Ser. No. 08,450,622 filed May 25, 1995 now U.S. Pat. No. 5,610,739.
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0357463 |
Mar 1990 |
EPX |
0562120 |
Sep 1993 |
EPX |
5-289108 |
Nov 1993 |
JPX |
Non-Patent Literature Citations (2)
Entry |
"Thin Film Transistor for Gray Scale LCD," IBM Technical Disclosure Bulletin, vol. 33, No. 1A, Jun. 1, 1990. |
Sunata et al., "A Wide-Viewing-Angle 10-Inch-Diagonal Full-Color Active-Matrix LCD Using a Halftone-Grayscale Method," Proceedings of the International Display Research Conference, No. CONF. 11, Oct. 15, 1991 Institute of Electrical and Electronics Engineers, XP000571463, pp. 255-257. |
Divisions (1)
|
Number |
Date |
Country |
Parent |
450622 |
May 1995 |
|