Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2008-04-29
2008-04-29
Eisen, Alexander (Department: 2629)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S102000
Reexamination Certificate
active
07365718
ABSTRACT:
A light emitting element drive apparatus capable of always outputting the lowest voltage satisfying the drive conditions and having a high light emitting efficiency and a low power loss, and a portable apparatus using the same, comprising a LED drive apparatus10to which LEDs20-1to20-n of different drive voltages required for emitting light are connected in parallel and driving one or more LEDs, wherein the LED drive apparatus10has drive circuits13-1to13-n connected to the corresponding LEDs among a plurality of LEDs and driving the corresponding LEDs with luminances based on set values and power supply circuits14and15for deciding a drive voltage value required for the highest light emission among one or more LEDs driven to emit light based on drive states of drive circuits (for example terminal voltages of the current source) and supplying a drive voltage having at least the decided value to a plurality of LEDs in parallel.
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Saito Junji
Sudo Kazuo
Tsuchida Kazuhito
Eisen Alexander
Kananen Ronald P.
Mack Chanelle N.
Rader & Fishman & Grauer, PLLC
Sony Corporation
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