Liquid crystal display panel of improving color washout

Patent metadata

Field	Value
Publication number	US-9804433-B2
Application number	US-201514888439-A
Country	US
Kind code	B2
Filing date	Oct 12, 2015
Priority date	Sep 8, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention provides a liquid crystal display panel of improving color washout, setting different alignment angles in the sub pixel areas of different colors (the included angle between the alignment direction of the liquid crystal molecules and the branch electrode of the pixel electrode). Then, the alignment angle of the red sub pixel area is the largest, and the alignment angle of the green sub pixel area is smaller, and the alignment angle of the blue sub pixel area is smallest. Thus, it is possible to respectively modulate the transmittance-voltage curves and the brightness-voltage curves of the lights of different colors to optimize the white dot chromaticity for satisfying the optical specification and compensate the losing transmittance of the blue light in the panel for improving the color washout problem.

First claim

What is claimed is:

1. A liquid crystal display panel of improving color washout, comprising an upper substrate, a lower substrate oppositely located to the upper substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, an upper alignment film located at one side of the upper substrate close to the liquid crystal layer, and a lower alignment film located at one side of the lower substrate close to the liquid crystal layer;
liquid crystals in the liquid crystal layer are positive liquid crystals;
the upper alignment film and the lower alignment film are alignment films which can achieve horizontal alignment;
the lower substrate comprises gate lines extending along a horizontal direction, data lines extending along a vertical direction and pixel electrodes; the plurality of gate lines separately arranged along the horizontal direction and the plurality of data lines separately arranged along the vertical direction are mutually insulated and staggered to divide a plurality of red sub pixel areas, a plurality of green sub pixel areas and a plurality of blue sub pixel areas; the red sub pixel areas, the green sub pixel areas and the blue sub pixel areas are provided with the pixel electrodes;
the pixel electrode comprises two strip horizontal electrodes which are mutually parallel and spaced, and a plurality of strip branch electrodes connected between the two strip horizontal electrodes which are mutually parallel, and certain included angles A appear between the strip branch electrodes and the data lines;
an alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel with the data line;
a relation among included angles A R between the strip branch electrodes and the data lines in the red sub pixel area, included angles A G between the strip branch electrodes and the data lines in the green sub pixel area and included angles A B between the strip branch electrodes and the data lines in the blue sub pixel area is: A R >A G >A B .

2. The liquid crystal display panel of improving color washout according to claim 1 , wherein the included angles A between the strip branch electrodes and the data lines are smaller than 30°.

3. The liquid crystal display panel of improving color washout according to claim 1 , wherein the included angles A R between the strip branch electrodes and the data lines in the red sub pixel area are 15°; the included angles A G between the strip branch electrodes and the data lines in the green sub pixel area are 10°; the included angles A B between the strip branch electrodes and the data lines in the blue sub pixel area are 5°.

4. The liquid crystal display panel of improving color washout according to claim 1 , wherein the alignment of the upper alignment film and the lower alignment film is rubbing alignment or light alignment.

5. A liquid crystal display panel of improving color washout, comprising an upper substrate, a lower substrate oppositely located to the upper substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, an upper alignment film located at one side of the upper substrate close to the liquid crystal layer, and a lower alignment film located at one side of the lower substrate close to the liquid crystal layer;
liquid crystals in the liquid crystal layer are positive liquid crystals;
the upper alignment film and the lower alignment film are alignment films which can achieve horizontal alignment;
the lower substrate comprises gate lines extending along a horizontal direction, data lines extending along a vertical direction and pixel electrodes; the plurality of gate lines separately arranged along the horizontal direction and the plurality of data lines separately arranged along the vertical direction are mutually insulated and staggered to divide a plurality of red sub pixel areas, a plurality of green sub pixel areas and a plurality of blue sub pixel areas; the red sub pixel areas, the green sub pixel areas and the blue sub pixel areas are provided with the pixel electrodes;
the pixel electrode comprises two strip horizontal electrodes which are mutually parallel and spaced, and a plurality of branch electrodes connected to the two strip horizontal electrodes which are mutually parallel and spaced, and the branch electrodes comprises first strip branch electrodes having included angles A with the data lines, and second strip branch electrodes having included angles −A with the data lines;
an alignment direction of the liquid crystal molecules in the liquid crystal layer is parallel with the data line;
a relation among included angles A R between the first strip branch electrodes and the data lines in the red sub pixel area, included angles A G between the first strip branch electrodes and the data lines in the green sub pixel area and included angles A B between the first strip branch electrodes and the data lines in the blue sub pixel area is: A R >A G >A B .

6. The liquid crystal display panel of improving color washout according to claim 5 , wherein the included angles A between the first strip branch electrodes and the data lines are smaller than 30°.

7. The liquid crystal display panel of improving color washout according to claim 5 , wherein the included angles A R between the first strip branch electrodes and the data lines in the red sub pixel area are 15°; the included angles A G between the first strip branch electrodes and the data lines in the green sub pixel area are 10°; the included angles A B between the first strip branch electrodes and the data lines in the blue sub pixel area are 5°.

8. The liquid crystal display panel of improving color washout according to claim 5 , wherein the alignment of the upper alignment film and the lower alignment film is rubbing alignment or light alignment.

9. A liquid crystal display panel of improving color washout, comprising an upper substrate, a lower substrate oppositely located to the upper substrate, a liquid crystal layer sandwiched between the upper substrate and the lower substrate, an upper alignment film located at one side of the upper substrate close to the liquid crystal layer, and a lower alignment film located at one side of the lower substrate close to the liquid crystal layer;
liquid crystals in the liquid crystal layer are positive liquid crystals;
the upper alignment film and the lower alignment film are alignment films which can achieve horizontal alignment;
the lower substrate comprises gate lines extending along a horizontal direction, data lines extending along a vertical direction and pixel electrodes; the plurality of gate lines separately arranged along the horizontal direction and the plurality of data lines separately arranged along the vertical direction are mutually insulated and staggered to divide a plurality of red sub pixel areas, a plurality of green sub pixel areas and a plurality of blue sub pixel areas; the red sub pixel areas, the green sub pixel areas and the blue sub pixel areas are provided with the pixel electrodes;
the pixel electrode comprises two strip horizontal electrodes which are mutually parallel and spaced, and a plurality of strip branch electrodes connected between the two strip horizontal electrodes which are mutually parallel, and the strip branch electrodes and the data lines are parallel;
certain included angles A appear between an alignment direction of liquid crystal molecules in the liquid crystal layer and the data lines, and a relation among included angles A R between alignment direction of liquid crystal molecules and the data lines in the red sub pixel area, included angles A G between alignment direction of liquid crystal molecules and the data lines in the gree

Assignees

• Shenzhen China Star Optoelect

Inventors

• Song Yanjun
• Zhao Yongchao
• Hsieh Chungching

Classifications

• G02F1/133514 Primary

  Colour filters · CPC title

• G02B5/201

  in the form of arrays · CPC title

• G02B5/204

  in which spectral selection is performed by means of a conductive grid or array, e.g. frequency selective surfaces (for use with wavelengths longer than the infrared light H01Q15/0006) · CPC title

• G02F2001/13356

  Physics · mapped topic

• G02F2001/133391

  Physics · mapped topic