Inverter for liquid crystal display
First Claim
1. An inverter for a liquid crystal display, the inverter comprising:
- an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off-time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal;
a power switching element selectively transmitting a DC voltage in response to a signal from the inverter controller; and
a voltage booster for driving a lamp in response to a signal from the switching element;
wherein the inverter controller includes a control block which generates the carrier signal and the lamp driving signal, a time constant setting block which determines a time constant of the carrier signal, and an initiation block which resets the time constant given by the time constant setting block whenever pulses of the vertical synchronization signal are generated.
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Accused Products
Abstract
An inverter for a display includes; an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off-time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal from the signal controller, a power switching element transmitting a DC voltage in response to a signal from the inverter controller, and a voltage booster for driving a lamp in response to a signal from the switching element, wherein the inverter controller includes a control block which generates the carrier signal and the lamp driving signal, a time constant setting block which determines a time constant of the carrier signal, and an initiation block which resets the time constant given by the time constant setting block.
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Citations
9 Claims
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1. An inverter for a liquid crystal display, the inverter comprising:
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an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off-time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal; a power switching element selectively transmitting a DC voltage in response to a signal from the inverter controller; and a voltage booster for driving a lamp in response to a signal from the switching element; wherein the inverter controller includes a control block which generates the carrier signal and the lamp driving signal, a time constant setting block which determines a time constant of the carrier signal, and an initiation block which resets the time constant given by the time constant setting block whenever pulses of the vertical synchronization signal are generated. - View Dependent Claims (2, 3, 4)
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5. An inverter for a liquid crystal display, the inverter comprising:
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an inverter controller generating a carrier signal for pulse width modulation and a lamp driving signal having on-time and off time by pulse width modulating a dimming signal based on the carrier signal and controlling the on-time of the lamp driving signal in response to at least one of a vertical synchronization signal and a vertical synchronization start signal, wherein the inverter controller comprises a control block for generating the first and the second carrier signals, the lamp driving signal, and the oscillating signal, first and second time constant setting blocks for determining time constant of the first and the second carrier signal, a first initiation block for resetting the time constant given by the first time constant setting block whenever pulses of the vertical synchronization signal are generated, and a second initiation block for resetting the time constant given by the second time constant setting block whenever pulses of the horizontal synchronization signal are generated; a power switching element selectively transmitting a DC voltage in response to a signal from the inverter controller; and a voltage booster for driving a lamp in response to a signal from the switching element. - View Dependent Claims (6, 7, 8, 9)
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Specification