Patent ID: 8350827
Filing Date: 2013-01-08
Classification: G02F,G06F

Abstract:
1. A touch-sensing display screen comprising: an upper transparent substrate; a lower transparent substrate opposite the upper transparent substrate; a backlight unit having an infrared light source configured to radiate infrared light through the upper transparent substrate in a first direction; a transparent window disposed in alignment with the infrared light source and between the upper and lower transparent substrates; a portion of the infrared light radiated in the first direction being reflected back through the upper transparent substrate and through the transparent window in a second direction by an object touching a surface of the upper transparent substrate; a pixel area on the lower transparent substrate having a pixel thin-film transistor configured to activate a pixel electrode; and an infrared light-sensing thin-film transistor in the pixel area configured to sense the infrared light received through the upper transparent substrate and the transparent window in the second direction, and output an infrared light-sense signal in response thereto, wherein the infrared light-sensing thin-film transistor has a source electrode connected with a first driving voltage supply line supplying a first voltage, a gate electrode connected with a second driving voltage supply line supplying a second voltage different from the first voltage, and a drain electrode.