OPTO-TOUCH SCREEN

• US 20100060612A1
• Filed: 02/24/2009
• Published: 03/11/2010
• Est. Priority Date: 09/09/2008
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Joung, Il Kweon, JEON, Sang Youl, Han, Seung Heon
• Application Number:
  US12/391,716
• Publication Number:
  US 20100060612A1
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 3/0386 for light pen
• 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

There is provided an opto-touch screen including: an opto-touch panel including an infrared phosphor material emitting light when exposed to infrared light; a sensor part disposed at a side of the opto-touch panel to detect the light emitted from the opto-touch panel.

Claims

1. An opto-touch screen comprising:

an opto-touch panel including an infrared phosphor material emitting light when exposed to infrared light;

a sensor part disposed at a side of the opto-touch panel to detect the light emitted from the opto-touch panel.

2. The opto-touch screen of claim 1, further comprising an estimator estimating a light emitting location on the opto-touch panel in response to a signal detected by the sensor part.

3. The opto-touch screen of claim 1, wherein the infrared phosphor material emits a visible light or an infrared light when exposed to infrared light.

4. The opto-touch screen of claim 1, wherein the infrared phosphor material reacts to light having a wavelength of about 900 nm and emits light having a wavelength of about 800 nm.

5. The opto-touch screen of claim 1, wherein the opto-touch panel comprises a sheet having the infrared phosphor material and a transparent material blended together.

6. The opto-touch screen of claim 1, wherein the opto-touch panel comprises:

a transparent sheet; and

an infrared phosphor sheet disposed on the transparent sheet.

7. The opto-touch screen of claim 6, wherein the opto-touch panel further comprises another transparent sheet disposed on the infrared phosphor sheet.

8. The opto-touch screen of claim 5, wherein the transparent sheet comprises one of glass and acryl.

9. The opto-touch screen of claim 1, wherein the sensor part comprises at least two sensors provided such that the light emitting location is triangulated.

10. The opto-touch screen of claim 1, wherein the sensor part comprises an image sensor having a plurality of pixels arranged linearly, the plurality of pixels detecting the emitted light.