Liquid Crystal Panel and Display Apparatus Including Liquid Crystal Panel

• US 20090262061A1
• Filed: 04/20/2009
• Published: 10/22/2009
• Est. Priority Date: 04/21/2008
• Status: Active Grant

• Current Assignee: Infovision Optoelectronics Company Limited (Digital China Information Service Co., Ltd.)
• Original Assignee: Infovision Optoelectronics Company Limited (Digital China Information Service Co., Ltd.)
• Inventors: Liao, Chia-Te, Chung, Te-Chen, Chiu, Yu-Wen, Jen, Tean-Sen
• Granted Patent: US 8,537,084 B2
• Time in Patent Office: Days
• US Class Current: 345/100
• CPC Class Codes: G02F 1/134318 having a patterned common electrode
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0434 Flat panel display in which a field is applied parallel to the display plane
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors

Abstract

A liquid crystal panel includes a plurality of pixel units, each of which include gating lines, data lines, a pixel electrode and a thin film transistor (TFT). Common electrodes of first pixel units in a same row are electrically connected via a first common line, and common electrodes of second pixel units in the same row are electrically connected via a second common line. The first common line is connected with a first common voltage and the second common voltage is connected with a second common voltage. The first common voltage and the second common voltage are alternating current voltages and have opposite polarities in the same frame. The liquid crystal panel can decrease power consumption of a source driver and lower cost of the liquid crystal panel.

Claims

1. A liquid crystal panel comprising a plurality of pixel units arranged in rows and in even and odd columns, each of the plurality of pixel units comprising gating lines, data lines, a pixel electrode, and a thin film transistor, wherein

common electrodes of first pixel units in a same row are electrically connected via a first common line, and common electrodes of second pixel units in the same row are electrically connected through a second common line.

2. The liquid crystal panel of claim 1, wherein a single data line is electrically connected with the first pixel units or the second pixel units in two adjacent columns.

3. The liquid crystal panel of claim 1, wherein a single gating line is electrically connected with pixel units in all odd columns and in two adjacent rows or with pixel units in all even columns and in two adjacent rows.

4. The liquid crystal panel of claim 1, wherein a positive voltage is inputted to the first pixel units and a negative voltage is inputted to the second pixel units.

5. The liquid crystal panel of claim 1, wherein the first common line is connected with a first common voltage and the second common line is connected with a second common voltage.

6. The liquid crystal panel of claim 5, wherein the first common voltage and the second common voltage are alternating current voltages respectively and have opposite polarities to one another in a frame.

7. The liquid crystal panel of claim 6, wherein the alternating current voltages are square-wave alternating current voltages.

8. The liquid crystal panel of claim 5, wherein polarities of the first common voltage and the second common voltage change with polarities of data voltages applied to the data lines.

9. The liquid crystal panel of claim 1, wherein the liquid crystal panel is an In-Plane Switching liquid crystal panel, a Fringe-Field Switching liquid crystal panel, or a Twisted Nematic liquid crystal panel.

10. The liquid crystal panel of claim 9, wherein data voltages are applied to the data lines before the thin film transistor is turned on.

11. The liquid crystal panel of claim 9, wherein common electrodes of the Twisted Nematic liquid crystal panel are electrodes for forming a storage capacitor.

12. A liquid crystal display apparatus comprising a plurality of gating lines, a plurality of data lines and a plurality of pixel units, each pixel unit comprising a pixel electrode and a thin film transistor, wherein

common electrodes of first pixel units in a same row are electrically connected via a first common line, and common electrodes of second pixel units in the same row are electrically connected through a second common line.

13. The liquid crystal display apparatus of claim 12, wherein a single data line is electrically connected with the first pixel units or the second pixel units in two adjacent columns.

14. The liquid crystal display apparatus of claim 12, wherein a single gating line is electrically connected with pixel units in all odd or even columns and in two adjacent rows.

15. The liquid crystal display apparatus of claim 12, wherein the first pixel units and the second pixel units have opposite polarities.

16. The liquid crystal display apparatus of claim 12, wherein the first common line is connected with a first common voltage and the second common line is connected with a second common voltage.

17. The liquid crystal display apparatus of claim 16, wherein the first common voltage and the second common voltage are alternating current voltages and have opposite polarities to one another in a frame.

18. The liquid crystal display apparatus of claim 17, wherein polarities of the first common voltage and the second common voltage are opposite to polarities of data voltages applied to the data lines.

19. The liquid crystal display apparatus of claim 12, wherein data voltages are applied to the data lines before the thin film transistor is turned on.