Method and apparatus for dimming a lamp in a backlight of a liquid crystal display
A method and apparatus for dimming a lamp in a backlight system of a display device, e.g., liquid crystal display (""LCD""), with a brightness dimming ratio of 10,000:1, which is a factor of 10 better than conventional dimming devices. A switching means is provided in an inverter...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A method and apparatus for dimming a lamp in a backlight system of a display device, e.g., liquid crystal display (""LCD""), with a brightness dimming ratio of 10,000:1, which is a factor of 10 better than conventional dimming devices. A switching means is provided in an inverter circuit, which has reactive components, that drives the lamp. A switching means is positioned in the inverter circuit such that, when it is closed, the energy stored within the reactive components of the inverter circuit is discharged to ground. In one embodiment, the signals from the power supply are pulse width modulated. |
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