HVA liquid crystal display

• US 10,126,605 B2
• Filed: 10/12/2015
• Issued: 11/13/2018
• Est. Priority Date: 09/01/2015
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Ye, Yanxi
• Primary Examiner(s): Davison, Angela K
• Assistant Examiner(s): Jung, Jonathan Y
• Application Number:
  US14/888,441
• Publication Number:
  US 20170160597A1
• Time in Patent Office: 1,128 Days
• CPC Class Codes: G02F 1/133302 Rigid substrates, e.g. inorganic substrates
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1393 the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells G02F1/1396, G02F1/141 take precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

The present invention provides a HVA liquid crystal display panel, comprising an upper substrate (1), a lower substrate (2) and a liquid crystal layer (3) located between the upper substrate (1) and the lower substrate (2); the upper substrate (1) comprises a first substrate (11), and a common electrode layer (12) located on the first substrate (11) facing the lower substrate (2); the lower substrate (2) comprises a second substrate (21), a plurality of gate scan lines and a plurality of data lines (22) located on the second substrate (21); the plurality of gate scan lines and the plurality of data lines (22) crisscross to form a plurality of sub pixel areas; the common electrode layer (12) comprises a hollow part (121) correspondingly above the gate scan lines and the data lines (22), to prevent border light leakage and color washout phenomenon of the sub pixel areas for replacing a black matrix to achieve light shielding function.

Claims

1. A HVA liquid crystal display panel, comprising an upper substrate, a lower substrate and a liquid crystal layer located between the upper substrate and the lower substrate;

the upper substrate comprises a first substrate, and a plane type common electrode layer located at one side of the first substrate facing the lower substrate;

the lower substrate comprises a second substrate, a plurality of gate scan lines and a plurality of data lines located on the second substrate;

the plurality of gate scan lines and the plurality of data lines crisscross to form a plurality of sub pixel areas;

the plurality of gate scan lines and the plurality of data lines are at borders of the plurality of sub pixel areas;

the plane type common electrode layer comprises a hollow part correspondingly above the gate scan lines and the data lines, and the upper substrate does not comprise a black matrix above the gate scan lines and the data lines at the borders of the plurality of sub pixel areas, wherein a projection of the hollow part in the plane type common electrode layer of the upper substrate on the lower substrate completely covers the gate scan lines and the data lines at the borders of the plurality of sub pixel areas, and no electric field generates among the hallow part and the gate scan lines, the data lines, to prevent border light leakage of the sub pixel areas because liquid crystals in the area are driven for replacing the black matrix to achieve light shielding function and to prevent color washout phenomenon as an alignment of the upper substrate and the lower substrate is shifted.

2. The HVA liquid crystal display panel according to claim 1, wherein the lower substrate further comprises a passivation layer located on the second substrate, and a pixel electrode layer located on the passivation layer, and the pixel electrode layer comprises one pixel electrode corresponding to each sub pixel area;

the sub pixel area comprises a red sub pixel area, a green sub pixel area and a blue sub pixel area.

3. The HVA liquid crystal display panel according to claim 2, wherein the upper substrate further comprises a color filter layer located between the first substrate and the plane type common electrode layer, and the color filter layer comprises a red color block, a green color block and a blue color block respectively corresponding to the red sub pixel area, the green sub pixel area and the blue sub pixel area.

4. The HVA liquid crystal display panel according to claim 2, wherein the lower substrate further comprises a color filter layer located on the passivation layer, and the color filter layer comprises a red color block, a green color block and a blue color block respectively corresponding to the red sub pixel area, the green sub pixel area and the blue sub pixel area.

5. The HVA liquid crystal display panel according to claim 2, wherein material of the plane type common electrode layer and the pixel electrode layer is ITO.

6. The HVA liquid crystal display panel according to claim 1, wherein the hollow part of the plane type common electrode layer is formed by a photolithography process with a mask.

7. The HVA liquid crystal display panel according to claim 1, wherein the pixel electrode layer is a patterned electrode layer, and the pixel electrode is divided into multiple domains in each sub pixel area.

8. The HVA liquid crystal display panel according to claim 1, wherein both the first substrate and the second substrate are glass substrates.

9. A HVA liquid crystal display panel, comprising an upper substrate, a lower substrate and a liquid crystal layer located between the upper substrate and the lower substrate;

the upper substrate comprises a first substrate, and a plane type common electrode layer located at one side of the first substrate facing the lower substrate;

the lower substrate comprises a second substrate, a plurality of gate scan lines and a plurality of data lines located on the second substrate;

the plurality of gate scan lines and the plurality of data lines crisscross to form a plurality of sub pixel areas;

the plurality of gate scan lines and the plurality of data lines are at borders of the plurality of sub pixel areas;

the plane type common electrode layer comprises a hollow part correspondingly above the gate scan lines and the data lines, and the upper substrate does not comprise a black matrix above the gate scan lines and the data lines at the borders of the plurality of sub pixel areas, wherein a projection of the hollow part in the plane type common electrode layer of the upper substrate on the lower substrate completely covers the gate scan lines and the data lines at the borders of the plurality of sub pixel areas, and no electric field generates among the hallow part and the gate scan lines, the data lines, to prevent border light leakage of the sub pixel areas because liquid crystals in the area are driven for replacing the black matrix to achieve light shielding function and to prevent color washout phenomenon as an alignment of the upper substrate and the lower substrate is shifted;

wherein the lower substrate further comprises a passivation layer located on the second substrate, and a pixel electrode layer located on the passivation layer, and the pixel electrode layer comprises one pixel electrode corresponding to each sub pixel area;

the sub pixel area comprises a red sub pixel area, a green sub pixel area and a blue sub pixel area.

10. The HVA liquid crystal display panel according to claim 9, wherein the upper substrate further comprises a color filter layer located between the first substrate and the plane type common electrode layer, and the color filter layer comprises a red color block, a green color block and a blue color block respectively corresponding to the red sub pixel area, the green sub pixel area and the blue sub pixel area.

11. The HVA liquid crystal display panel according to claim 9, wherein the lower substrate further comprises a color filter layer located on the passivation layer, and the color filter layer comprises a red color block, a green color block and a blue color block respectively corresponding to the red sub pixel area, the green sub pixel area and the blue sub pixel area.

12. The HVA liquid crystal display panel according to claim 9, wherein material of the plane type common electrode layer and the pixel electrode layer is ITO.

13. The HVA liquid crystal display panel according to claim 9, wherein the hollow part of the plane type common electrode layer is formed by a photolithography process with a mask.

14. The HVA liquid crystal display panel according to claim 9, wherein the pixel electrode layer is a patterned electrode layer, and the pixel electrode is divided into multiple domains in each sub pixel area.

15. The HVA liquid crystal display panel according to claim 9, wherein both the first substrate and the second substrate are glass substrates.