Importance

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Abstract

The preferred embodiment a stereoscopic LCD shutter glass driver system requires only a total of 3 CMOS integrated circuit chips in order to convert horizontal and vertical sync signals into LCD shutter glass drive signals. A negative charge pump is used increase the LCD drive voltage thereby reducing 3D crosstalk in the image. The video signal input is shown with a passthrough connection intended for direct hook-up to a television or CRT monitor. A first flip flop detects vertical and horizontal sync and is used to drive the charge pump. A stable, predictable field ID signal is produced by the flip flop whose two complimentary outputs act as inputs to a second flip flop chip which produces the drive signals for the LCD shutter glasses. A third flip flop produces a LCD 'common' signal that is sent to both LCD shutters. The second flip flop produces a drive signal for each LCD shutter. A field swap between the two shutters is implemented with a switch located at the output of the third flip flop.

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First Claim