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US 8,947,340 B2Granted
Backlight unit and display apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorDuyeon Han
Life of this patent
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Abstract
A backlight unit includes a plurality of light sources, a boost circuit, a plurality of balance circuits, and a plurality of first resistors. The boost circuit boosts an input alternating current voltage and applies a driving alternating current voltage to the light sources. Each of the balance circuits includes a first capacitor and is disposed between an output terminal of the boost circuit and the light sources. Each of the first resistors connects two balance circuits among the balance circuits.
Claims17
A backlight unit comprising:
- a plurality of light sources;
- a boost circuit that boosts an input alternating current voltage and applies a driving alternating current voltage to the light sources;
- a plurality of balance circuits each connected between an output terminal of the boost circuit and a corresponding light source of the plurality of light sources, wherein each balance circuit comprises a first capacitor;
- and
- a plurality of first resistors each connected between two balance circuits of the plurality of balance circuits;
- a plurality of second resistors each connected between the two balance circuits of the plurality of balance circuits,
- wherein each of the first resistors is connected between first terminals of the two balance circuits, and each of the second resistors is connected between second terminals of the two balance circuits, wherein the first terminals are connected to an output terminal of the boost circuit and the second terminals are connected to an input terminal of the plurality of light sources.
4 more elements
A display apparatus comprising:
- a backlight unit that generates light;
- and
- a display panel that receives the light from the backlight and uses it to illuminate a displayed image, wherein the backlight unit comprises:
- a plurality of light sources;
- a boost circuit that boosts an input alternating current voltage and applies a driving alternating current voltage to the light sources;
- a plurality of balance circuits each connected between an output terminal of the boost circuit and a corresponding light source of the plurality of light sources, wherein each balance circuit comprises a first capacitor;
- and
- a plurality of first resistors each connected between two balance circuits of the plurality of balance circuits;
- a plurality of second resistors each connected between the two balance circuits of the plurality of balance circuits,
- wherein each of the first resistors is connected between first terminals of the two balance circuits, and each of the second resistors is connected between second terminals of the two balance circuits, wherein the first terminals are connected to an output terminal of the boost circuit and the second terminals are connected to an input terminal of the plurality of light sources.
7 more elements
Dependencies are inferred from the claim text.