Array substrate and curved display device

• US 9,634,040 B2
• Filed: 07/03/2014
• Issued: 04/25/2017
• Est. Priority Date: 06/09/2014
• 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: Guo, Jinbo, Wu, Chuan
• Primary Examiner(s): Kraig, William F
• Assistant Examiner(s): Kim, Sun M
• Application Number:
  US14/416,697
• Publication Number:
  US 20150357351A1
• Time in Patent Office: 1,027 Days
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/13624 having more than one switching element per pixel
• CPC Class Codes: G09G 2300/0447 for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
• CPC Class Codes: G09G 2300/0852 being a dynamic memory with more than one capacitor
• CPC Class Codes: G09G 3/03 specially adapted for displays having non-planar surfaces, e.g. curved displays
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors

Abstract

The Present disclosure relates to the field of display technology and discloses an array substrate and a curved display device which can solve the technical problem of dark area on both sides of the existing curved display device. The array substrate according to the present disclosure comprises a number of sub pixel units arranged as an array, each sub pixel unit comprising a main sub pixel, a secondary sub pixel and a voltage-dividing capacitor. Said array substrate is divided into a compensation region and a non-compensation region. The capacitance of the voltage-dividing capacitor of the sub pixel unit in the compensation region is smaller than that of the voltage-dividing capacitor of the sub pixel unit in the non-compensation region. The present disclosure is applicable to curved display devices such as curved television and curved display, etc.

Claims

1. An array substrate for a curved display device, comprising a number of first pixel units and second pixel units arranged as an array, each of the first pixel units and second pixel units comprising a main sub pixel, a secondary sub pixel and a voltage-dividing capacitor,

wherein the curved display device comprises a center and two bent sides,

wherein said array substrate is divided into a compensation region and a non-compensation region, and the capacitance of the voltage-dividing capacitor of the first pixel unit positioned in the compensation region is smaller than that of the voltage-dividing capacitor of the second pixel unit positioned in the non-compensation region, wherein the compensation region is positioned only at both bent sides of the array substrate,

wherein the first pixel units are only positioned in the compensation region.

2. The array substrate according to claim 1, wherein the compensation region is in the shape of an ellipse.

3. The array substrate according to claim 1, further comprising:

a first gate line, a second gate line, and a common electrode line provided for each row of the first and second pixel units, and

a data line provided for each column of the first and second pixel units.

4. The array substrate according to claim 3, wherein a voltage-dividing electrode is arranged in each of the first and second pixel units, and said voltage-dividing capacitor is formed by the overlapping portion between the voltage-dividing electrode and the common electrode line.

5. The array substrate according to claim 4, wherein the area of the voltage-dividing electrode of the first pixel unit in the compensation region is smaller than that of the voltage-dividing electrode of the second pixel unit in the non-compensation region.

6. The array substrate according to claim 4, wherein each of the first and second pixel units further comprises a first switching element, a second switching element, a third switching element, a main pixel electrode disposed inside the main sub pixel, and a secondary pixel electrode disposed inside the secondary sub pixel,

said first switching element is connected to the first gate line with its gate electrode, and to the data line with its source electrode, and to the main pixel electrode with its drain electrode,

said second switching element is connected to the first gate line with its gate electrode, and to the data line with its source electrode, and to the secondary pixel electrode with its drain electrode, and

said third switching element is connected to the second gate line with its gate electrode, and to the secondary pixel electrode with its source electrode, and to the voltage-dividing electrode with its drain electrode.

7. The array substrate according to claim 6, wherein the first switching element, the second switching element, and the third switching element are all thin film transistors.

8. A curved display device, comprising a color film substrate and an array substrate,

wherein the curved display device comprises a center and two bent sides,

wherein said array substrate comprises a plurality of first pixel units and second pixel units arranged as an array, a first pixel unit and a second pixel unit each comprising a main sub pixel, a secondary sub pixel and a voltage-dividing capacitor, and

said array substrate is divided into a compensation region and a non-compensation region, and the capacitance of the voltage-dividing capacitor of the first pixel unit positioned in the compensation region is smaller than that of the voltage-dividing capacitor of the second pixel unit positioned in the non-compensation region, wherein the compensation region is positioned only at both bent sides of the array substrate,

wherein the first pixel units are only positioned in the compensation region.

9. The curved display device according to claim 8, wherein the compensation region is in the shape of an ellipse.

10. The curved display device according to claim 8, further comprising

a first gate line, a second gate line, and a common electrode line provided for each row of the first and second pixel units, and

a data line provided for each column of the first and second pixel units.

11. The curved display device according to claim 10, wherein a voltage-dividing electrode is arranged in each of the first and second pixel units, and said voltage-dividing capacitor is formed by the overlapping portion between the voltage-dividing electrode and the common electrode line.

12. The curved display device according to claim 11, wherein the area of the voltage-dividing electrode of the first pixel unit in the compensation region is smaller than that of the voltage-dividing electrode of the second pixel unit in the non-compensation region.

13. The curved display device according to claim 11, wherein each of the first and second pixel units further comprises a first switching element, a second switching element, a third switching element, a main pixel electrode disposed inside the main sub pixel, and a secondary pixel electrode disposed inside the secondary sub pixel,

said first switching element is connected to the first gate line with its gate electrode and to the data line with its source electrode, and to the main pixel electrode with its drain electrode,

said second switching element is connected to the first gate line with its gate electrode, and to the data line with its source electrode, and to the secondary pixel electrode with its drain electrode, and

said third switching element is connected to the second gate line with its gate electrode, and to the secondary pixel electrode with its source electrode, and to the voltage-dividing electrode with its drain electrode.

14. The curved display device according to claim 13, wherein the first switching element, the second switching element, and the third switching element are all thin film transistors.

15. The curved display device according to claim 8, wherein said curved display device is a vertical alignment type display device.