Display device having touch screen function

• US 20100149133A1
• Filed: 12/04/2009
• Published: 06/17/2010
• Est. Priority Date: 12/16/2008
• Status: Abandoned Application

• Current Assignee: Samsung SDI Company Limited
• Original Assignee: Samsung SDI Company Limited
• Inventors: Woo, Seok-Gyun, Yim, Sang-Hoon, Choo, Seong-Gi
• Application Number:
  US12/591,939
• Publication Number:
  US 20100149133A1
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0428 by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual sensing beam interruptions in a planar beam grid of an optical touch-screen G06F3/0421

Abstract

A display device has a display panel generating visible light and generating infrared rays; a plurality of detectors detecting a change in an intensity of the infrared rays generated by the display panel; and the plurality of detectors recognizing a touch applied to the display panel in dependence upon the change detected in the intensity of the infrared rays.

Claims

1. A display device having a touch screen function, the display device comprising:

a display panel which emits light and displays an image; and

a plurality of detectors which detect a touch applied on the display panel by detecting intensity of the light emitted by the display panel.

2. The display device of claim 1, with the plurality of detectors being disposed on edges of a front surface of the display panel.

3. The display device of claim 1, with the plurality of detectors being disposed on corners of a front surface of the display panel.

4. The display device of claim 3, when the number of the plurality of detectors is two, the detectors being disposed on neighboring corners among the corners of the display panel, facing to the light emitted by the display device, and being arranged such that central paths of the detectors cross each other.

5. The display device of claim 3, when the number of the plurality of detectors is two, the detectors being respectively disposed on two corners formed at two opposite ends of diagonal of the display panel, being arranged such that central paths of the detectors cross each other, and having directivity for detecting light.

6. The display device of claim 3, when the number of the plurality of detectors is four, the detectors being disposed on neighboring corners among the corners of the display panel, being arranged such that central paths of the detectors cross each other, and having directivity for detecting light.

7. The display device of claim 1, when the number of the plurality of detectors is at least three, the display device having a function simultaneously detecting multiple touches applied to the display device.

8. The display device of claim 1, with the plurality of detectors being disposed at a predetermined angle with respect to a surface of the display panel.

9. The display device of claim 1, with the plurality of detectors measuring light intensity, and detecting location on the display panel where a change in intensity of light is detected.

10. The display device of claim 1, with the plurality of detectors being any one of a photodiode, a photo transistor, and an infrared ray camera.

11. The display device of claim 1, with the light being infrared rays.

12. The display device of claim 1, with the display panel further comprising:

a first area where the image is formed and where the light is emitted;

a second area which is surrounded by the first area and where the light is not emitted, and

the plurality of detectors being disposed in the second area.

13. The display device of claim 1, further comprising a filter which is disposed on the display panel, and the filter being formed so as the light to be detected by the plurality of detectors penetrates through the filter.

14. The display device of claim 13, the light detected by the plurality of detectors being infrared rays.

15. The display device of claim 14, wherein a permeability of the infrared ray of the filter is at least 90%.

16. A display device, comprising:

a display panel generating visible light and generating infrared rays;

a plurality of detectors detecting a change in an intensity of the infrared rays generated by the display panel; and

the plurality of detectors recognizing a touch applied to the display panel in dependence upon the change detected in the intensity of the infrared rays.

17. A display device, comprising:

a display panel generating infrared rays and displaying variable images by generating visible light;

a plurality of detectors disposed on corners of the display panel at a predetermined angle with respect to a surface of the display panel, the plurality of the detectors detecting a change in intensity of the infrared rays by scanning the entire display panel; and

the plurality of detectors determining the touch applied by an object to the display panel by using the detected change of the intensity of the infrared rays.

18. The display panel of claim 17, with the plurality of detectors oriented at predetermined angles to a viewing surface of the display panel.

19. The display panel of claim 18, with the plurality of detectors disposed in an array along a periphery of the display panel.