In-plane switching mode active matrix liquid crystal display unit
View Patent ↗In order to improve the light transmissivity above the transparent comb-teeth electrodes provided in an in-plane switching mode active matrix liquid crystal display unit, the liquid crystal gaps above the transparent comb-teeth electrodes are made larger than the liquid crystal gaps between the transparent comb-teeth electrodes.
1. An in-plane switching mode active matrix liquid crystal display unit comprising:
a first substrate including a plurality of scan lines, a plurality of common lines parallel with the scan lines, a plurality of data lines that cross the scan lines, and active elements near the cross portions of the data lines and the scan lines;
a second substrate parallel with the first substrate;
a liquid crystal layer between the first and second substrates;
a plurality of transparent comb-teeth electrodes on the first substrate for applying electric fields to the liquid crystal layer; and
first insulating patterns on the first substrate, the first insulating patterns being spaced from ends of each of said electrodes,
wherein liquid crystal gaps above the transparent comb-teeth electrodes are approximately 1.0 μm to 1.5 μm larger than liquid crystal gaps between the transparent comb-teeth electrodes.
2. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 1 , wherein the first insulating patterns form first steps between the transparent comb-teeth electrodes so as to make the liquid crystal gaps above the transparent comb-teeth electrodes approximately 1.0 μm to 1.5 μm larger than the liquid crystal gaps between the transparent comb-teeth electrodes.
3. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 2 , further comprising second insulating patterns on the second substrate that form second steps between the electrodes so as to make the liquid crystal gaps above the transparent comb-teeth electrodes approximately 1.0 μm to 1.5 μm larger than the liquid crystal gaps between the transparent comb-teeth electrodes.
4. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 3 , wherein each of the first and second steps is provided with a taper angle.
5. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 4 , wherein the taper angle is larger than 45 degrees.
6. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 3 , wherein the first and second steps are formed using an organic film.
7. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 2 , wherein each of the first steps is provided with a taper angle.
8. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 7 , wherein the taper angle is larger than 45 degrees.
9. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 2 , wherein the first steps are formed using an organic film.
10. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 1 , further comprising second insulating patterns on the second substrate that form second steps between the electrodes so as to make the liquid crystal gaps above the transparent comb-teeth electrodes approximately 1.0 μm to 1.5 μm larger than the liquid crystal gaps between the transparent comb-teeth electrodes.
11. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 10 , wherein each of the second steps is provided with a taper angle.
12. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 11 , wherein the taper angle is larger than 5 degrees.
13. The in-plane switching mode active matrix liquid crystal display unit as claimed in claim 10 , wherein the second steps are formed using an organic film.