POWER CONTROL SYSTEM FOR LCD MONITOR
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Abstract
A power control system for an LCD monitor having an LCD panel includes a light source unit providing light to the LCD panel, a power supply unit generating a standard low DC current, and a high-voltage generator for converting the lower DC voltage to a relatively high voltage and supplying the high voltage to the light source. The power control system further includes a feedback control unit coupled to the power supply unit for interrupting the operation of the power supply unit when the converted high voltage is determined to be abnormal. The feedback control unit includes a cable, through which a voltage can be induced due to high voltage generated by the high-voltage generator, and a power supply control circuit capable of interrupting the operation of the power supply unit when the converted high voltage is determined to be abnormal by analyzing the induced current. The
8 Citations
41 Claims
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1-21. -21. (canceled)
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22. A power control system for a liquid crystal display (LCD) monitor having an LCD panel, the power control system comprising:
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a light source unit for providing light to the LCD panel; a power supply unit for generating a low direct current PC) voltage; a high-voltage generator for outputting to the light source unit a high voltage based on the low DC voltage; and a feedback control unit for detecting a voltage induced from the high voltage output from the high-voltage generator, for determining based on a level of the induced voltage an abnormal condition of the high voltage output, and for inhibiting the output of the high-voltage generator during a time corresponding to the abnormal condition by suspending operation of said power supply unit during the time corresponding to the abnormal condition, the induced voltage representing the abnormal condition if a power surge exists in the high voltage output, representing the abnormal condition if there is no detection of induced voltage from the high voltage output, and representing the abnormal condition if the induced voltage indicates that the high voltage output is less than a predetermined voltage level. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method for controlling power to a liquid crystal display (LCD) monitor having an LCD panel, the method comprising:
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generating a low direct current (DC) voltage; generating a high voltage based on the low DC voltage; applying the generated high voltage to a light source unit for providing light to the LCD panel; detecting a voltage induced from the high voltage provided to the light source unit; determining, based on a level of the induced voltage, an abnormal condition of the generated high voltage, the induced voltage representing the abnormal condition if a power surge exists in the generated high voltage, representing the abnormal condition if there is no detection of induced voltage from the generated high voltage, and representing the abnormal condition if the induced voltage indicates that the high voltage is less than a predetermined voltage level; and inhibiting generating said high voltage during a time corresponding to the abnormal condition by suspending generating said low DC voltage. - View Dependent Claims (38, 39, 40, 41)
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Specification