DISPLAY DEVICE AND ASSOCIATED METHOD

• US 20160093260A1
• Filed: 12/26/2014
• Published: 03/31/2016
• Est. Priority Date: 09/29/2014
• Status: Abandoned Application

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: WATSUDA, Hirofumi
• Application Number:
  US14/583,458
• Publication Number:
  US 20160093260A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2310/0232 Special driving of display border areas
• 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 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A display device comprises a display panel. The display panel comprises a plurality of gate lines, a plurality of data lines, a plurality of sub-pixels, a gate driver connected to the gate lines, and a data driver connected to the data lines. The data driver comprises a de-multiplexer controller for outputting a plurality of control signals to a plurality of control lines, a data process portion for outputting a plurality of data signals to a plurality of signal lines, and a first de-multiplexer comprising a plurality of switches connected to the de-multiplexer controller through the control lines, the data process portion through at least one of the signal lines, and the sub-pixels through the data lines. Wherein the switches of the first de-multiplexer keep turned on within a first horizontal period.

Claims

1. A display device, comprising:

a display panel, comprising a plurality of gate lines, a plurality of data lines, and a plurality of sub-pixels;

a gate driver, connected to the gate lines; and

a data driver, connected to the data lines, comprising;

a de-multiplexer controller, for outputting a plurality of control signals to a plurality of control lines;

a data process portion, for outputting a plurality of data signals to a plurality of signal lines; and

a first de-multiplexer comprising a plurality of switches, connected to the de-multiplexer controller through the control lines, connected to the data process portion through at least one of the signal lines, and connected to the sub-pixels through the data lines,

wherein the switches of the first de-multiplexer keep turned on within a first horizontal period.

2. The display device according to claim 1, wherein the control signals for the first de-multiplexer synchronously keep the switches of the first de-multiplexer turned on or turned off within the first horizontal period.

3. The display device according to claim 1, wherein the control signals for the first de-multiplexer substantially keep the same voltage level within the first horizontal period.

4. The display device according to claim 1, wherein the sub-pixels in a first row and corresponding to the first de-multiplexer substantially keep the data signals as a first voltage level within the first horizontal period.

5. The display device according to claim 4, wherein the sub-pixels in a second row and corresponding to the first de-multiplexer substantially keep the data signals as a second voltage level within a second horizontal period adjacent to the first horizontal period, and the first voltage level and the second voltage level are different.

6. The display device according to claim 5, wherein the first voltage level and the second voltage level have the same polarity with respect to a common voltage level.

7. The display device according to claim 5, wherein the first voltage level and the second voltage level have opposite polarity with respect to a common voltage level.

8. The display device according to claim 4, wherein the sub-pixels in the first row and corresponding to a second de-multiplexer adjacent to the first de-multiplexer substantially keep the data signals as a third voltage level within the first horizontal period, and the first voltage level and the third voltage level have opposite polarity with respect to a common voltage level.

9. The display device according to claim 8, wherein the sub-pixels in the second row corresponding to the second de-multiplexer substantially keep the data signals as a fourth voltage level within a second horizontal period adjacent to the first horizontal period, and the third voltage level and the fourth voltage level are different

10. The display device according to claim 9, wherein the third voltage level and the fourth voltage level have the same polarity with respect to the common voltage level.

11. The display device according to claim 9, wherein the third voltage level and the fourth voltage level have opposite polarity with respect to the common voltage level.

12. The display device according to claim 8, wherein the sub-pixels in the first row corresponding to the first de-multiplexer are interlaced with the sub-pixels in the first row corresponding to the second de-multiplexer.

13. The display device according to claim 12, wherein two adjacent sub-pixels are corresponding to different polarity.

14. The display device according to claim 1, wherein the control signals for the first de-multiplexer are asynchronous within a third horizontal period adjacent to the first horizontal period.

15. The display device according to claim 14, wherein the control signals are separated.

16. The display device according to claim 1, wherein the number of the control lines is equal to the number of the data lines corresponding to the first de-multiplexer.

17. The display device according to claim 1, wherein the sub-pixels comprise transmissive type sub-pixels and reflective type sub-pixels, wherein the transmissive type sub-pixels form rows, and the reflective type sub-pixels form rows therebetween.

18. The display device according to claim 17, wherein the control signals for the reflective type sub-pixels of first de-multiplexer keep substantially the same voltage level within the first horizontal period in transmissive mode.

19. The display device according to claim 17, wherein the control signals for the transmissive type sub-pixels of first de-multiplexer substantially keep the same voltage level within the first horizontal period in reflective mode.

20. A method for driving a display device, the display device comprising:

a display panel, comprising a plurality of gate lines, a plurality of data lines, and a plurality of sub-pixels;

a gate driver, connected to the gate lines; and

a data driver, connected to the data lines, comprising;

a de-multiplexer controller, for outputting a plurality of control signals to a plurality of control lines;

a data process portion, for outputting a plurality of data signals to a plurality of signal lines; and

a first de-multiplexer comprising a plurality of switches, connected to the de-multiplexer controller through the control lines, connected to the data process portion through at least one of the signal lines, and connected to the sub-pixels through the data lines,

wherein the switches of the first de-multiplexer keep turned on within a first horizontal period.