Power circuit, display device and mobile terminal...

Details Power circuit, display device and mobile terminal... Power circuit, display device and mobile terminal...

2011-07-05

2011-07-05

Nguyen, Chanh (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C327S333000

Reexamination Certificate

active

07973783

ABSTRACT:
A power circuit includes: a frequency dividing circuit dividing the frequency of a first signal to which a level shift processing has been applied; a boosting circuit boosting the voltage according to an output signal from the frequency dividing circuit or a second signal having a lower frequency than that of the first signal as a boosting pulse; a level shifter; and a switching unit. The switching unit obtains a boosted voltage output from the boosting circuit after a boosting operation, performed by the boosting circuit having received the second signal, inputs the boosted voltage output to the level shifter such that the level shifter can execute level conversion of the first signal, and stops the boosting operation performed according to the second signal, thereafter inputting the level-shifted first signal to the boosting circuit via the frequency dividing circuit to obtain a final boosted voltage.

REFERENCES:
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patent: 2002/0001207 (2002-01-01), Kishimoto et al.
patent: 2006/0164366 (2006-07-01), Yu et al.
patent: 11-338572 (1999-12-01), None
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patent: 2004-229434 (2004-08-01), None
Japanese Office Action for application No. 2006-218130 dated Jul. 15, 2008.

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