Optical: systems and elements – Optical modulator – Light wave temporal modulation
Reexamination Certificate
2009-12-02
2010-12-28
Choi, William C (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave temporal modulation
C345S107000, C345S214000
Reexamination Certificate
active
07859742
ABSTRACT:
A frequency conversion correction circuit for an electrophoretic display (EPD) which has a control circuit to capture pixel signals of a next picture and gets a corresponding update signal from a look up table to be output, and a driving circuit to provide a plurality set of potential difference signals corresponding to a plurality set of electrodes of an EPD panel according to the update signal. The EPD further has an environment detection device and a duty frequency judgment unit. The environment detection device detects the operation environments of the EPD and gets an environment parameter. The duty frequency judgment unit compares the preset signal value sections where the environment parameter is located and generates a duty frequency signal and sends to the driving circuit. The driving circuit changes and outputs the frequency of the potential difference signals in a fixed frame time according to the duty frequency signal.
REFERENCES:
patent: 2010/0188395 (2010-07-01), Uchida et al.
patent: 200832031 (2008-08-01), None
Chan Bryan
Cheng Ping-Yueh
Chiu Wen-Pin
Lin Craig
Lin Feng-Shou
Choi William C
Muncy Geissler Olds & Lowe, PLLC
Sipix Technology, Inc.
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