Title:
DISPLAY DEVICE CAPABLE OF OPTICAL POINTING INPUT
Document Type and Number:
WIPO Patent Application WO/2014/021479
Kind Code:
A1
Abstract:
The present invention relates to a display device capable of optical pointing input, the display device comprising a screen unit in which unit recognition elements constituted by optical sensors are arranged according to a predetermined arrangement rule, each optical sensor including a thin film transistor and a light-receiving diode connected to a signal output part of the thin film transistor; and a driving/recognition unit for recognizing the point at which light is input using a change in the output voltage characteristics of the thin film transistor, caused by a change in the value of electric resistance of the light-receiving diode when light is input to the screen unit from an external source. When the light input to the screen unit causes a change in the output voltage characteristics of three or more unit recognition elements, the driving/recognition unit detects the three unit recognition elements which output the largest change in the voltage characteristics, and recognizes the point at which the light is input, using the arrangement rule of the unit recognition elements and a triangulation method.
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Inventors:
KIM SEONG-WHAN (KR)
AHN SANG-JIN (KR)
AHN SANG-JIN (KR)
Application Number:
PCT/KR2012/006068
Publication Date:
February 06, 2014
Filing Date:
July 30, 2012
Export Citation:
Assignee:
UNIV SEOUL INDUSTRY COOPERATON FOUNDATION (KR)
KIM SEONG-WHAN (KR)
AHN SANG-JIN (KR)
KIM SEONG-WHAN (KR)
AHN SANG-JIN (KR)
International Classes:
G06F3/042
Foreign References:
| KR20100008988A | 2010-01-27 | |||
| KR20110111110A | 2011-10-10 | |||
| KR20080070084A | 2008-07-29 | |||
| KR20100128388A | 2010-12-08 | |||
| KR20030047328A | 2003-06-18 |
Attorney, Agent or Firm:
HONG, JI-MYUNG (KR)
홍지명 (KR)
홍지명 (KR)
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