Title:
DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/040094
Kind Code:
A1
Abstract:
A plurality of sensor pixel circuits (10) comprising two photodiodes (D1, D2), one storage node which stores a charge corresponding to the amount of light, and a read transistor (M1) having a control terminal attached to the storage node are arranged in a pixel region (4). According to the clock signal CLK, when the backlight is lit, the transistor (T1) is switched on and current flows to the photo diode (D1), decreasing the potential of the storage node. When the backlight is not lit, the transistor (T2) is switched on and current flows to the photo diode (D2), increasing the potential of the storage node. It is possible to change the sensitivity characteristics of both photodiodes using the clock signal CLK. The difference between the amount of light that enters when the backlight is lit and the amount of light that enters when the backlight is not lit is detected using this type of sensor pixel circuit. Thus provided is a display device having an input function that does not depend on the light environment.
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Inventors:
TANAKA KOHHEI
SUGITA YASUHIRO
YAMAMOTO KAORU
BROWN CHRISTOPHER
SUGITA YASUHIRO
YAMAMOTO KAORU
BROWN CHRISTOPHER
Application Number:
PCT/JP2010/059686
Publication Date:
April 07, 2011
Filing Date:
June 08, 2010
Export Citation:
Assignee:
SHARP KK (JP)
TANAKA KOHHEI
SUGITA YASUHIRO
YAMAMOTO KAORU
BROWN CHRISTOPHER
TANAKA KOHHEI
SUGITA YASUHIRO
YAMAMOTO KAORU
BROWN CHRISTOPHER
International Classes:
G06F3/042; G06F3/041; G09F9/30
Foreign References:
| JP2009217461A | 2009-09-24 | |||
| JP2007025796A | 2007-02-01 | |||
| JP2005352490A | 2005-12-22 |
Attorney, Agent or Firm:
SHIMADA, AKIHIRO (JP)
Akihiro Shimada (JP)
Akihiro Shimada (JP)
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