Field sequential color mode liquid crystal display
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United States of America Patent
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Feb 4, 2014
Grant Date -
Aug 9, 2007
app pub date -
Dec 4, 2006
filing date -
Feb 9, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
In an FSC mode LCD, a controller operates in response to an external adjustment, and a DC/DC converter converts a battery voltage into a driving voltage under control of the controller. A color LED backlight includes first, second and third color LED arrays connected in parallel, which are operated by the driving voltage. An FSC generator generates first, second and third color PWM signals according to an internal sawtooth voltage and a dimming voltage. A 3-channel current source generates first, second and third driving currents under control of the controller, and on/off switches paths of the first, second and third driving currents flowing through the first, second and third color LED arrays according to the first, second and third color PWM signals generated from the FSC generator, thereby adjusting luminance of the first, second and third color LED arrays of the color LED backlight.
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