TOUCH RECOGNITION SYSTEM AND METHOD FOR TOUCH SCREEN

• US 20140055415A1
• Filed: 11/28/2012
• Published: 02/27/2014
• Est. Priority Date: 08/22/2012
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Sung Un
• Application Number:
  US13/688,136
• Publication Number:
  US 20140055415A1
• Time in Patent Office: Days
• US Class Current: 345/175
• CPC Class Codes: G06F 3/0425 using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected tracking a projected light spot to determine a position on a display surface G06F3/0386

Abstract

Disclosed herein is a touch screen recognition method. The method includes photographing an image of, an infrared ray pattern and a periphery of the pattern using an infrared ray camera disposed on a rear surface of the touch screen. A reference clarity value is set for the pattern image and the periphery thereof. A touch manipulation is recognized when pressure is exerted on the touch screen and a change in brightness of the clarity value is detected by comparing an image clarity value and the reference clarity value of the touched portion.

Claims

1. A touch screen recognition method, comprising:

photographing, by an image generation device, an image of an infrared ray pattern and a periphery of the pattern using an infrared ray camera disposed on a rear surface of the touch screen;

setting, by a processor, a reference clarity value of the pattern image and the periphery thereof; and

identifying, by a processor, a touch manipulation by detecting a brightness change of the reference clarity value, wherein the brightness change is a comparison of an image clarity value and the reference clarity value of the touched portion.

2. The touch screen recognition method of claim 1, wherein detecting a brightness change of the reference clarity value includes:

arbitrarily setting a critical clarity value configured to recognize a pressure on the touch screen; and

identifying touch manipulation when the brightness change of the image clarity value of the touched portion exceeds the critical clarity value.

3. The touch recognition method of claim 2, wherein the touch manipulation exists when the image clarity value of the infrared ray pattern or the periphery of the pattern exceeds the critical clarity value.

4. The touch recognition method of claim 1, wherein the reference clarity value is set to correspond to brightness of an exterior surrounding of the touch screen.

5. The touch recognition method of claim 1, wherein the clarity value is set to gradually increase or decrease according to a gray color level in the infrared pattern image.

6. The touch recognition method of claim 1, wherein a resilient elastic layer is disposed on a surface of the touch screen configured to detect the pressure on the touch screen.

7. A system comprising:

an image generation device configured to photograph an image of an infrared ray pattern and a periphery of the pattern using an infrared ray camera disposed on a rear surface of the touch screen;

a processor configured to set a reference clarity value of the pattern image and the periphery thereof, and identify touch manipulation by detecting a brightness change of the reference clarity value, wherein the brightness change is a comparison of an image clarity value and the reference clarity value of the touched portion.

8. The system of claim 7, wherein the processor is further configured to, during detection of a brightness change of the reference clarity value, arbitrarily set a critical clarity value configured to recognize a pressure on the touch screen, and identify touch manipulation when the brightness change of the image clarity value of the touched portion exceeds the critical clarity value.

9. The system of claim 8, wherein the touch manipulation exists when the image clarity value of the infrared ray pattern or the periphery of the pattern exceeds the critical clarity value.

10. The system of claim 7, wherein the reference clarity value is set to correspond to brightness of an exterior surrounding of the touch screen.

11. The system of claim 7, wherein the clarity value is set to gradually increase or decrease according to a gray color level in the infrared pattern image.

12. The system of claim 7, wherein a resilient elastic layer is disposed on a surface of the touch screen configured to detect the pressure on the touch screen.

18. The non-transitory computer readable medium of claim 7, wherein a resilient elastic layer is disposed on a surface of the touch screen configured to detect the pressure on the touch screen.

13. A non-transitory computer readable medium containing program instructions executed by a process, the computer readable medium comprising:

program instructions that instruct an image generation device to photograph an image of an infrared ray pattern and a periphery of the pattern using an infrared ray camera disposed on a rear surface of the touch screen;

program instructions that set a reference clarity value of the infrared pattern image and the periphery thereof; and

program instructions that identify a touch manipulation by detecting a brightness change of the reference clarity value, wherein the brightness change is a comparison of an image clarity value and the reference clarity value of the touched portion.

14. The non-transitory computer readable medium of claim 13, further comprising program instruction that, during detection of a brightness change of the reference clarity value, arbitrarily set a critical clarity value configured to recognize a pressure on the touch screen, and identify touch manipulation when the brightness change of the image clarity value of the touched portion exceeds the critical clarity value.

15. The non-transitory computer readable medium of claim 14, wherein the touch manipulation exists when the image clarity value of the infrared ray pattern or the periphery of the pattern exceeds the critical clarity value.

16. The non-transitory computer readable medium of claim 13, wherein the reference clarity value is set to correspond to brightness of an exterior surrounding of the touch screen.

17. The non-transitory computer readable medium of claim 13, wherein the clarity value is set to gradually increase or decrease according to a gray color level in the infrared pattern image.