Invention Grant
- Patent Title: Display device
- Patent Title (中): 显示设备
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Application No.: US13810482Application Date: 2011-07-22
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Publication No.: US08816285B2Publication Date: 2014-08-26
- Inventor: Hiromi Katoh , Naru Usukura
- Applicant: Hiromi Katoh , Naru Usukura
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Keating & Bennett, LLP
- Priority: JP2010-167446 20100726
- International Application: PCT/JP2011/066735 WO 20110722
- International Announcement: WO2012/014817 WO 20120202
- Main IPC: G01J5/10
- IPC: G01J5/10 ; G06F3/041 ; G06F3/042

Abstract:
A photosensor-equipped display device is provided having a combination of visible and non-visible light sources where a voltage drop is minimized when the non-visible light sources are turned on. The display device includes: a plurality of infrared LEDs (3b); photosensors (9) provided in a pixel region (4) for detecting reflected light originating from the infrared LEDs (3b); a sensor row driver circuit (7) configured to supply a sensor drive signal to the photosensors (9); an amplifier circuit (6) configured to amplify a signal read from the photosensors (9) in response to the sensor drive signal and output a photosensor signal; a signal processing circuit (20) configured to process the photosensor signal output from the amplifier circuit (6); and a backlight control circuit (13) configured to control on and off of the infrared LEDs (3b). The plurality of photosensors (9) are divided into a plurality of sensor groups in the pixel region (4). The light source control circuit (13) causes separate sets of infrared LEDs (3b), corresponding to the sensor groups, to be on during different time periods.
Public/Granted literature
- US20130112880A1 DISPLAY DEVICE Public/Granted day:2013-05-09
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