| 摘要 |
<p>PURPOSE: A light emitting diode of a driving circuit is provided to improve accuracy of control by controlling upper limit voltage and lower limit voltage according to a normal level state or an overflow state. CONSTITUTION: A driving voltage offer block(BKGDR) comprises a booster converter(110) and a pulse width modulator(120). The booster converter boosts and levels input voltage(VIN). The pulse width modulator modulates pulse width of a pulse signal(VMI) offered from the booster converter and creates a boost control signal(VMU). A control voltage generation block(BKVCON) offers shifting data(SDAT) and control reference voltage(VRCON). The control voltage generation block comprises a feedback monitoring part(210), a data shifter(220) and DAC(Digital-to-Analog Converter)(230).</p> |
