Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-06-24
2008-06-24
Awad, Amr A. (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S211000, C345S690000
Reexamination Certificate
active
07391406
ABSTRACT:
A booster converter outputs a boosted voltage. A plurality of LEDs emit light of respective colors. The transistors establish or shut connection between the LEDs and a main driving circuit. A variable current circuit feeds a current to drive the LEDs. A PWM control unit effects control to cause the LEDs to emit light with respective tones of color. A PWM circuit executes PWM modulation in accordance with an instruction from the PWM control unit. A setting control unit138controls the magnitude of the driving current fed by the variable current circuit in accordance with an instruction from a second light emission control unit. In an image pickup mode, an additional driving circuit feeds a driving current to the LEDs so that the LEDs operate as an electronic flash.
REFERENCES:
patent: 2005/0052141 (2005-03-01), Thielemans et al.
patent: 8-241059 (1996-09-01), None
patent: 2001-272938 (2001-05-01), None
patent: 2002-111786 (2002-04-01), None
patent: 2002-319497 (2002-10-01), None
patent: 2003-69084 (2003-03-01), None
patent: WO 02/089219 (2002-11-01), None
Japanese Office Action for Patent Application No. 2003-322293 dated Apr. 3, 2007.
Miyanaga Koichi
Yamamoto Isao
Awad Amr A.
Cantor & Colburn LLP
Moon Seokyun
Rohm & Co., Ltd.
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