Touch sensible display device

• US 20060132463A1
• Filed: 12/05/2005
• Published: 06/22/2006
• Est. Priority Date: 12/03/2004
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Joo-Hyung, Uh, Kee-Han, Choi, Young-Jun
• Application Number:
  US11/295,252
• Publication Number:
  US 20060132463A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display device according to an embodiment of the present invention includes: a display panel including a plurality of image scanning lines and a plurality of sensor scanning lines; a plurality of display units coupled to the image scanning lines; a plurality of photo sensing units coupled to the sensor scanning lines and outputting sensor output signals in response to an amount of external light; an image scanning driver applying image scanning signals to the image scanning lines; and an sensor scanning driver applying sensor scanning signals to the sensor scanning lines, wherein the image scanning driver and the sensor scanning driver are disposed at the same side of the display panel.

Claims

1. A display device comprising:

a display panel including a plurality of image scanning lines and a plurality of sensor scanning lines;

a plurality of display units coupled to the image scanning lines;

a plurality of photo sensing units coupled to the sensor scanning lines and outputting sensor output signals in response to an amount of external light;

an image scanning driver applying image scanning signals to the image scanning lines; and

an sensor scanning driver applying sensor scanning signals to the sensor scanning lines,

wherein the image scanning driver and the sensor scanning driver are disposed at the same side of the display panel.

2. The display device of claim 1, wherein the sensor scanning driver receives the image scanning signals from the image scanning driver and outputs the image scanning signals as the sensor scanning signals according to at least one frame signal.

3. The display device of claim 2, wherein the sensor scanning driver comprises a plurality of switching transistors connected between the image scanning driver and the sensor scanning lines.

4. The display device of claim 3, wherein the switching transistors comprise first and second switching transistors coupled to the same sensor scanning line and alternately turning on every frame.

5. The display device of claim 4, wherein the sensor scanning driver outputs odd image scanning signals from the image scanning driver as the sensor scanning signals in odd frames, and outputs even image scanning signals from the image scanning driver as the sensor scanning signals in even frames.

6. The display device of claim 3, wherein the switching transistors comprise first, second, third, and fourth switching transistors coupled to the same sensor scanning line and sequentially turning on in a period of four frames.

7. The display device of claim 1, wherein the image scanning driver comprises first and second image scanning circuits disposed at opposite sides of the display panel and alternately connected to the image scanning lines.

8. The display device of claim 7, wherein the sensor scanning driver comprises first and second sensor scanning circuits disposed at opposite sides of the display panel.

9. The display device of claim 8, wherein the sensor scanning lines comprise first sensor scanning lines coupled to the first sensor scanning circuit and second sensor scanning lines coupled to the second sensor scanning circuit, and the first and the second sensor scanning lines are alternately arranged on the display panel.

10. The display device of claim 8, wherein the first and the second sensor scanning circuits are coupled to the same scanning signal lines.

11. The display device of claim 10, wherein the first sensor scanning circuit outputs first image scanning signals from the first image scanning circuit and outputs the first image scanning signals as the sensor scanning signals according to the at least one frame signal, and the second sensor scanning circuit outputs second image scanning signals from the second image scanning circuit and outputs the second image scanning signals as the sensor scanning signals according to the at least one frame signal.

12. The display device of claim 11, wherein the first sensor scanning circuit comprises first switching transistors connected between the first image scanning circuit and the sensor scanning lines, and the second sensor scanning circuit comprises second switching transistors connected between the second image scanning circuit and the sensor scanning lines.

13. The display device of claim 12, wherein the first sensor scanning circuit outputs the first image scanning signals from the first image scanning circuit as the sensor scanning signals in odd frames, and outputs the second image scanning signals from the second image scanning circuit as the sensor scanning signals in even frames.

14. The display device of claim 1, wherein the sensor scanning signals are applied to the sensor scanning lines at different timings in different frames.

15. The display device of claim 14, wherein a common voltage applied to the display units swings between a high level and a low level, and the sensor output signals output when the common voltage is a predetermined one of the high level and the low level.

16. The display device of claim 15, wherein the display device performs frame inversion and row inversion.

17. The display device of claim 1, wherein the image scanning driver and the sensor scanning driver are integrated into the display panel.

18. The display device of claim 17, wherein the image scanning driver comprises a shift register including a plurality of stages.

19. The display device of claim 17, wherein the sensor scanning driver comprises a shift register including a plurality of stages.

20. The display device of claim 1, wherein at least two of the sensor scanning lines are connected to each other to be coupled to the sensor scanning driver.