Digital control system for LCD backlights
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United States of America Patent
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Dec 15, 2009
Grant Date -
Mar 9, 2006
app pub date -
Feb 6, 2004
filing date -
Feb 6, 2003
priority date (Note) -
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Abstract
Present invention provides an apparatus and a method for digital control of a backlight system in an LCD display. More specifically, the system utilizes a control system in embedded firmware and a mixed signal micro controller unit (MCU) to allow servo digital control of the operation of the backlight system. The MCU provides multiple input and output ports. The ports operate digital and analog signals, which connect a processor to the backlight system and allow the processor to operate the functions of the inverter and the lamps. The embedded firmware control implements digital servo functions and several algorithms used to precisely and automatically set lamp operation, control individual lamps, compensate for aging, perform diagnostics, optimize power consumption and automate manufacturing tests.
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