Independent power supply module for LCD
AssigneeChunghwa Picture Tubes, Ltd.
InventorsWei-Wen Chung, Chi-Hsiu Lin, Ming-Chang Lin
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Abstract
A power supply module for an LCD includes a system power supply module and a backlight power supply module. The system power supply module is used to drive a display panel module of the LCD. The backlight power supply module utilizes a power factor correction device to convert an input AC voltage to a DC voltage, and then utilizes a DC/AC inverter to convert the DC voltage to an AC driving voltage to drive the backlight module. The power supply module is also applicable to a plurality of LCDs.
Claims10
A power supply module for a Liquid Crystal Display (LCD), the LCD having a display panel module, a backlight module, and a system circuit, the power supply module comprising:
- a backlight power supply module, comprising:
- a Power Factor Corrector (PFC) for converting a first AC voltage to a first DC voltage;
- and
- a DC/AC inverter, electrically connected to the backlight module, for converting the first DC voltage to a second AC voltage;
- and
- a system power supply module, comprising:
- an AC/DC rectifier, for converting the first AC voltage to a second DC voltage;
- and
- a DC/DC converting module, electrically connected to the system circuit, for converting the second DC voltage to a third voltage.
A power supply module for an LCD, the LCD having a first and a second display panel modules, a first and a second backlight modules, a first and a second system circuits, the power supply module comprising:
- a first backlight power supply module, comprising:
- a first PFC, for converting a first AC voltage to a first DC voltage;
- and
- a first DC/AC inverter, electrically connected to the first backlight module, for converting the first DC voltage to a second AC voltage;
- a second backlight power supply module, comprising:
- a second PFC, for converting the first AC voltage to a second DC voltage;
- and
- a second DC/AC inverter, electrically connected to the second backlight module, for converting the second DC voltage to a third AC voltage;
- and
- a system power supply module, comprising:
- an AC/DC rectifier, for converting the first AC voltage to a third DC voltage;
- and
- a DC/DC converting module, electrically connected to the first and the second system circuit, for converting the third DC voltage to a fourth DC voltage.
Dependencies are inferred from the claim text.