REFLECTIVE COLOR FILTER LIQUID CRYSTAL DISPLAY

• US 20110007249A1
• Filed: 07/06/2010
• Published: 01/13/2011
• Est. Priority Date: 07/07/2009
• Status: Active Grant

• Current Assignee: XI'AN Yisheng Optoelectronics Technology Co., Ltd.
• Original Assignee: Jiangsu Lexvu Electronics Co., Ltd.
• Inventors: HUANG, HERB HE
• Granted Patent: US 8,228,467 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133521 Interference filters
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon

Abstract

A reflective color filter liquid crystal display, in the reverse order of receiving incident light, includes a backplane substrate, a reflective electrode layer, a planar liquid crystal cell, a transparent protective dielectric layer and a transparent plate. The transparent plate is adapted for receiving and transmitting the incident light. The planar liquid crystal cell is sandwiched between the reflective electrode layer and the transparent conductive film. The reflective electrode layer further includes a first band reflective electrode, a second band reflective electrode and a third band reflective electrode in a regularly tiled planar arrangement.

Claims

1. A reflective color filter LCD, in a reverse order of receiving an incident light along an incident direction, comprising:

a backplane substrate, a reflective electrode layer, a planar liquid crystal cell, a transparent conductive film and a transparent plate, wherein;

the transparent plate is adapted for receiving and transmitting the incident light;

the planar liquid crystal cell is sandwiched between the reflective electrode layer and the transparent conductive film;

the reflective electrode layer comprises a first band reflective electrode, a second band reflective electrode and a third band reflective electrode placed on top of the backplane substrate in a regularly tiled planar arrangement perpendicular to the incident direction, and are electrically isolated from each other, adapted for reflecting the incident light passing through the transparent plate to form a first reflective light corresponding to a first reflection spectrum, a second reflective light corresponding to a second reflection spectrum and a reflective light corresponding to a third reflection spectrum, respectively;

the backplane substrate comprises a driving circuitry electrically connected to the first band reflective electrode, the second band reflective electrode and the third band reflective electrode, adapted for forming electric field between the reflective electrode layer and the transparent conductive film, driving liquid crystal molecules in the planar liquid crystal cell to twist so as to allow the incident light to reach the reflective electrode layer and allow the first reflective light, the second reflective light and the third reflective light to irradiate out of the transparent substrate.

2. The LCD according to claim 1, wherein the first band reflective electrode comprises a first reflective electrode plate b stacked and electrically connected with a first conductive color filtering element a, the second band reflective electrode comprises a second reflective electrode plate b stacked and electrically connected with a second conductive color filtering element a, and the third band reflective electrode comprises a third reflective electrode plate b stacked and electrically connected with a third conductive color filtering element a.

3. The LCD according to claim 2, wherein:

the first conductive color filtering element a, the second conductive color filtering element a and the third conductive color filtering element a are made from conductive inks or conductive paints which contain color conductive particles; and

the first reflective electrode plate b, the second reflective electrode plate b and the third reflective electrode plate b made of any or combination of reflective metals and their alloys comprising aluminum, titanium, copper, platinum, silver and gold.

4. The LCD according to claim 3, wherein the driving circuitry is further adapted for:

electrically charging or discharging the first conductive color filtering element a via the first reflective electrode plate b, and driving the color conductive particles in the first conductive color filtering element a to move so as to modulate the light reflected from the first reflective electrode plate b as the first reflective light;

electrically charging or discharging the second conductive color filtering element a via the second reflective electrode plate b, and driving the color conductive particles in the second conductive color filtering element a to move so as to modulate the light reflected from the second reflective electrode plate b as the second reflective light; and

electrically charging or discharging the third conductive color filtering element a via the third reflective electrode plate b, and driving the color conductive particles in the third conductive color filtering element a to move so as to modulate the light reflected from the third reflective electrode plate b as the third reflective light.

5. The LCD according to claim 3, wherein the color conductive particles are any or combination of powdered silver and carbon with color additives.

6. The LCD according to claim 1, wherein the first reflection spectrum, the second reflection spectrum and the third reflection spectrum correspond to band pass spectra of blue, green and red, respectively.

7. The LCD according to claim 1, wherein the first reflection spectrum, the second reflection spectrum and the third reflection spectrum correspond to band block spectra of yellow, magenta and cyan, respectively.

8. The LCD according to claim 1, wherein a first alignment layer is further coated above the reflective electrode layer, a second alignment layer is further coated underneath the transparent plate, and the first alignment layer and the second alignment layer sandwich the planar liquid crystal cell.

9. The LCD according to claim 8, wherein the first alignment layer and the second alignment layer are made in any single or composite layer of polyimide, silicon oxide, silicon nitride and carbon.

10. The LCD according to claim 8, wherein the first alignment layer is further filled in the gaps among the first band reflective electrode, the second band reflective electrode and the third band reflective electrode, and is adapted for electrically isolating the first band reflective electrode, the second band reflective electrode and the third band reflective electrode from each other.

11. The LCD according to claim 8, wherein a transparent protective dielectric layer is further placed between the reflective electrode layer and first alignment layer.

12. The LCD according to claim 11, wherein the transparent protective dielectric layer is made from any or combination of polyimide, silicon oxide, silicon nitride and carbon.

13. The LCD according to claim 11, wherein the transparent protective dielectric layer is further filled in the gaps among the first band reflective electrode, the second band reflective electrode and the third band reflective electrode, and is adapted for electrically isolating the first band reflective electrode, the second band reflective electrode and the third band reflective electrode from each other.

14. The LCD according to claim 1, wherein the reflective electrode layer further comprises pixel isolators adapted for electrically isolating the first band reflective electrode, the second band reflective electrode and the third band reflective electrode from each other.

15. The LCD according to claim 1, wherein the backplane substrate is made from semiconductors comprising silicon, germanium, gallium and arsenic.

16. The LCD according to claim 1, wherein the backplane substrate is made from any or combination of dielectric materials comprising glass and polymers.