Led substrate, backlight unit, and liquid crystal display device
AssigneeSharp Kabushiki Kaisha
InventorMitsuru Hosoki
Life of this patent
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Abstract
Provided is an LED substrate including a plurality of LEDs that is capable of being downsized in width. An LED substrate (20) includes a radiating plate (22) made from metal, an insulating layer (23), a plurality of LEDs (21) disposed linearly along a longitudinal direction of the radiating plate and connected to each other in series, and first and second ground patterns (33, 34) disposed at left and right ends of the LED substrate, wherein the first and second ground patterns are electrically connected to the radiating plate, which is disposed under the first and second ground patterns while sandwiching therebetween the insulating layer, via sheet-metal screws (71, 72).
Claims16
An LED substrate that comprises:
- a long radiating plate made from metal;
- an insulating layer disposed on an upper surface of the radiating plate;
- a plurality of LEDs disposed on an upper surface of the insulating layer linearly along a longitudinal direction of the radiating plate, and connected to each other in series;
- a light source pattern disposed at one end on the upper surface of the insulating layer, and connected to the first LED from the one end;
- a first ground pattern disposed at the other end on the upper surface of the insulating layer, and connected to the first LED from the other end;
- and
- a connector disposed at the one end on the upper surface of the insulating layer, and comprising a light-source-side terminal and a ground-side terminal,
- wherein the LED substrate further comprises a second ground pattern disposed at the one end on the upper surface of the insulating layer,
- wherein the light source pattern is connected to the light-source-side terminal of the connector,
- wherein the second ground pattern is connected to the ground-side terminal of the connector,
- wherein the first ground pattern is connected to the radiating plate via a first screw made from metal that is inserted in a first through-hole provided to the first ground pattern and the radiating plate, and
- wherein the second ground pattern is connected to the radiating plate via a second screw made from metal that is inserted in a second through-hole provided to the second ground pattern and the radiating plate.
A backlight unit comprising:
- a light guide plate having a plate shape;
- an LED substrate disposed on a side surface of the light guide plate;
- and
- a chassis made from metal and arranged to house the light guide plate and the LED substrate,
- wherein the LED substrate comprises:
- a long radiating plate made from metal;
- an insulating layer disposed on an upper surface of the radiating plate;
- a plurality of LEDs disposed on an upper surface of the insulating layer linearly along a longitudinal direction of the radiating plate, and connected to each other in series;
- a light source pattern disposed at one end on the upper surface of the insulating layer, and connected to the first LED from the one end;
- a first ground pattern disposed at the other end on the upper surface of the insulating layer, and connected to the first LED from the other end;
- and
- a connector disposed at the one end on the upper surface of the insulating layer, and comprising a light-source-side terminal and a ground-side terminal,
- wherein the LED substrate further comprises a second ground pattern disposed at the one end on the upper surface of the insulating layer,
- wherein the light source pattern is connected to the light-source-side terminal of the connector,
- wherein the second ground pattern is connected to the ground-side terminal of the connector,
- wherein the first ground pattern is connected to the radiating plate via a first screw made from metal that is inserted in a first through-hole provided to the first ground pattern and the radiating plate, and
- wherein the second ground pattern is connected to the radiating plate via a second screw made from metal that is inserted in a second through-hole provided to the second ground pattern and the radiating plate.
Dependencies are inferred from the claim text.