ELECTROLUMINESCENT BACKLIGHT DRIVING CIRCUIT
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United States of America Patent
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app pub date -
Jul 24, 2009
filing date -
Jul 24, 2009
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Abandoned
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Abstract
An electroluminescent (EL) backlight driving circuit is compatible with current display control circuit, and includes a power on/off unit controlled by an ON signal of the display to output the power supply of the display as a working voltage; a boost unit for boosting the working voltage to a modulation working voltage; a resonance unit for oscillating the modulation working voltage to generate an AC working voltage for driving an electroluminescent (EL) panel to emit light and serve as the backlight source of the display; and a voltage feedback unit for comparing an output feedback voltage of the resonance unit with a brightness signal of the display and then with a feedback control voltage of the boost unit to generate a voltage regulation signal, which is fed back to the boost unit for regulating the size of the AC working voltage and accordingly controlling the brightness of the EL panel.
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