Invention Grant
- Patent Title: Liquid crystal driving signal generating apparatus and optical disk reproducing apparatus with liquid crystal driving signal generating apparatus
- Patent Title (中): 具有液晶驱动信号发生装置的液晶驱动信号发生装置和光盘再现装置
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Application No.: US09055703Application Date: 1998-04-07
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Publication No.: US06388967B2Publication Date: 2002-05-14
- Inventor: Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
- Applicant: Junichi Furukawa , Kiyoshi Tateishi , Noriaki Murao , Hiroaki Abe
- Priority: JP9-103901 19970407
- Main IPC: G11B7135
- IPC: G11B7135
Abstract:
A liquid crystal driving signal generating apparatus comprises a PWM signal generator, a low pass filter for limiting a frequency band of a PWM signal outputted from the PWM signal generator, a liquid crystal panel connected to an output of the low pass filter, and a control means for controlling the PWM signal generator. The control means controls the PWM signal generator such that the PWM signal generator generates a PWM signal with a duty ratio corresponding to a refractive index to be set in the liquid crystal panel.
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