DISPLAY PANEL AND MULTIPLEXER CIRCUIT THEREIN, AND METHOD FOR TRANSMITTING SIGNALS IN DISPLAY PANEL

• US 20130127697A1
• Filed: 04/27/2012
• Published: 05/23/2013
• Est. Priority Date: 11/18/2011
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: TING, Yu-Hsin, LI, Chung-Lung, LIN, Nan-Ying, FU, Chung-Lin, HSU, Wei-Chun, CHEN, Pei-Hua
• Application Number:
  US13/458,026
• Publication Number:
  US 20130127697A1
• Time in Patent Office: Days
• US Class Current: 345/90
• CPC Class Codes: G09G 2310/0297 Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers

Abstract

A multiplexer circuit includes multiple groups of switches and multiple groups of control lines. Each control line in each one of the groups of control lines is coupled to a control end of at least one switch in corresponding one of the groups of switches, and each group of control lines is configured for synchronously transmitting an identical group of control signals. A display panel and method for transmitting signals in a display panel is also disclosed herein.

Claims

1. A multiplexer circuit comprising:

a plurality of switches comprising a first group of switches and a second group of switches;

a first group of control lines, each of the first group of control lines coupled to a control end of at least one of the first group of switches, the first group of control lines configured to transmit a first group of control signals; and

a second group of control lines, each of the second group of control lines coupled to a control end of at least one of the second group of switches, the second group of control lines configured to synchronously and independently transmit a second group of control signals which are the same as the first group of control signals.

2. The multiplexer circuit as claimed in claim 1, wherein the first group of control lines and the second group of control lines are configured to transmit the first group of control signals and the second group of control signals, respectively, in a period of a scan signal.

3. The multiplexer circuit as claimed in claim 1, wherein the first group of control signals comprises a plurality of clock signals, and phases of the clock signals are different from one another.

4. The multiplexer circuit as claimed in claim 1, wherein the first group of control lines and the second group of control lines are coupled to control ends of different switches of the plurality of switches.

5. The multiplexer circuit as claimed in claim 1, wherein each of the switches comprises a transistor made of InGaZn oxide.

6. The multiplexer circuit as claimed in claim 1, wherein each of the control lines in the first group and the second group is coupled to the control ends of two or more than two of the switches.

7. A display panel comprising:

a plurality of scan lines;

a plurality of data lines interlacing with the scan lines; and

a multiplexer circuit comprising;

a plurality of switches, first ends of the switches coupled to one ends of the data lines; and

a plurality of groups of control lines, two of the groups of control lines coupled to control ends of different ones of the switches, respectively, the groups of control lines configured to synchronously and independently transmit a plurality of identical groups of control signals.

8. The display panel as claimed in claim 7, further comprising:

a plurality of video signal lines, each of the video signal lines coupled to second ends of the switches corresponding to one group of control lines.

9. The display panel as claimed in claim 7, further comprising:

a scan driving circuit coupled to the scan lines and configured to output the scan signals sequentially transmitted through the scan lines; and

an application circuit coupled to the video signal lines and the groups of control lines, the application circuit configured for generating video signals transmitted through the video signal lines and for generating the groups of control signals transmitted synchronously through the groups of control lines.

10. The display panel as claimed in claim 9, wherein the scan driving circuit and the application circuit are arranged at opposite sides of a display array, and each of the control lines is coupled to the control end of at least one of the switches.

11. The display panel as claimed in claim 9, wherein the scan driving circuit is arranged at a first side of a display array, the multiplexer circuit and the application circuit are arranged at a second side adjacent to the first side of the display array, and each of the control lines is coupled to the control end of at least one of the switches.

12. The display panel as claimed in claim 7, further comprising:

an application circuit coupled to the video signal lines, the groups of control lines and the scan lines, the application circuit configured for generating video signals transmitted through the video signal lines, for generating the groups of control signals transmitted synchronously through the groups of control lines, and for generating scan signals transmitted through the scan lines.

13. The display panel as claimed in claim 12, wherein the multiplexer circuit and the application circuit are arranged at one side of a display array, and each of the control lines is coupled to the control end of at least one of the switches.

14. The display panel as claimed in claim 7, wherein the groups of control lines are configured to synchronously transmit the groups of control signals in a period of one scan signal transmitted by one of the scan lines.

15. The display panel as claimed in claim 7, wherein each of the groups of control signals comprises a plurality of clock signals, and two of the clock signals have a phase difference therebetween.

16. The display panel as claimed in claim 7, wherein each control line in the groups of control lines is coupled to the control ends of two or more than two of the switches.

17. A method for transmitting signals, applicable for the display panel as claimed in claim 7, the method comprising:

synchronously transmitting a plurality of identical groups of control signals through the groups of control lines to a plurality of groups of corresponding switches;

the groups of switches activated in accordance with the groups of control signals; and

transmitting a plurality of video signals through a plurality of corresponding video signal lines and the activated switches to the data lines.

18. The method as claimed in claim 17, wherein the groups of control signals are transmitted synchronously in a period of one scan signal transmitted by a scan line, each of the groups of control signals comprise a plurality of clock signals, and two of the clock signals have a phase difference therebetween.

19. The method as claimed in claim 17, wherein each of the groups of control signals comprise a plurality of clock signals, and two of the clock signals have a phase difference therebetween.

20. The method as claimed in claim 17, wherein the groups of control signals are transmitted synchronously in a period of one scan signal transmitted by a scan line.