Display device and driving device of light source for display device
AssigneeSamsung Electronics Co., Ltd.
InventorsHyeon-Yong Jang, Sang-Gil Lee, Min-Gyu Kim, Nam-Ok Kwon
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Abstract
A driving device of a light source includes an arc sensing unit and an inverter. The light source includes a lamp having a first terminal and a second terminal. The arc sensing unit extracts a high frequency component from a voltage applied to the light source and generates an arc sensing signal in response to the high frequency component. The inverter controls the light source in response to the sensing signal.
Claims25
A driving device of a light source for a display device, the light source including a lamp having a first terminal and a second terminal, the driving device comprising:
- an arc sensing unit connected to at least one of the first and second terminals and extracting a high frequency component from a voltage of the least one of the first and second terminals and generating an arc sensing signal in response to the high frequency component;
- and
- an inverter controlling the light source in response to the sensing signal.
A driving device of a light source for a display device, the light source including a lamp, the driving device comprising:
- an inverter applying an AC voltage to the lamp and turning on and off the lamp;
- a voltage divider electrically connected between the lamp and ground;
- a high pass filter electrically connected to the voltage divider;
- and
- an AC-DC converter electrically connected to the high pass filter and the inverter.
- wherein the AC-DC converter comprises a diode having an anode electrically connected to the high pass filter and a cathode electrically connected to a second capacitor electrically connected between the diode and ground.
A driving device of a light source for a display device, the light source including a lamp having a first terminal and a second terminal, the driving device comprising:
- an inverter applying an AC voltage to the lamp and turning on and off the lamp;
- a first voltage divider electrically connected to the first terminal of the lamp;
- a second voltage divider electrically connected to the first voltage divider and the second terminal of the lamp;
- a first high pass filter electrically connected to the first voltage divider;
- a second high pass filter electrically connected to the second voltage divider;
- and
- an AC-DC converter electrically connected to the first and second high pass filters and the inverter.
A display device comprising:
- pixels arranged in a matrix;
- a light source including a lamp having a first terminal and a second terminal and supplying light to the pixels;
- a high frequency sensing unit to at least one of the first and second terminals and extracting a high frequency component from a voltage of the least one of the first and second terminals and generating a high frequency sensing signal in response to the high frequency component;
- and
- an inverter controlling the light source in response to the high frequency sensing signal.
Dependencies are inferred from the claim text.