Electronic device display with a backlight
First Claim
1. A display backlight comprising:
- a flexible printed circuit board;
a row of light-emitting diodes mounted on the flexible printed circuit board;
a light guide layer having first and second opposing surfaces connected by an edge, wherein the edge receives light from the row of light-emitting diodes; and
a chassis that extends around a periphery of the light guide layer, wherein the chassis has a first portion that is adjacent to the row of light-emitting diodes and that is attached to the flexible printed circuit board and wherein the chassis has a second portion that extends over the row of light-emitting diodes.
1 Assignment
0 Petitions
Accused Products
Abstract
A backlight unit may be used to produce backlight illumination for a display. The backlight unit may have a row of light-emitting diodes that are mounted on a flexible printed circuit and that emit light into a light guide layer. The backlight unit may include a chassis that extends around the periphery of the light guide layer. The chassis may have a first portion that is mounted on the flexible printed circuit adjacent to the light-emitting diodes and a second portion that extends over the light-emitting diodes. A heat spreading layer may be attached to a reflector layer and the flexible printed circuit. The heat spreading layer may have a width that is less than the width of the reflector layer. Adhesive patches may attach the light guide layer to the flexible printed circuit. A patterned adhesive layer may be formed over the light-emitting diodes and the light guide layer.
14 Citations
27 Claims
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1. A display backlight comprising:
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a flexible printed circuit board; a row of light-emitting diodes mounted on the flexible printed circuit board; a light guide layer having first and second opposing surfaces connected by an edge, wherein the edge receives light from the row of light-emitting diodes; and a chassis that extends around a periphery of the light guide layer, wherein the chassis has a first portion that is adjacent to the row of light-emitting diodes and that is attached to the flexible printed circuit board and wherein the chassis has a second portion that extends over the row of light-emitting diodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A display backlight comprising:
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a flexible printed circuit board; a row of light-emitting diodes mounted on the flexible printed circuit board; at least first and second solder pads on the flexible printed circuit board, wherein a first light-emitting diode of the row of light-emitting diodes overlaps the first and second solder pads; a first adhesive patch that attaches the first light-emitting diode to the flexible printed circuit board; and a light guide layer having first and second opposing surfaces connected by an edge, wherein the edge receives light from the row of light-emitting diodes. - View Dependent Claims (22)
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23. A display backlight comprising:
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a flexible printed circuit board; a row of light-emitting diodes mounted on the flexible printed circuit board; a light guide layer having first and second opposing surfaces connected by an edge, wherein the edge receives light from the row of light-emitting diodes; a reflector layer that is positioned below the first surface of the light guide layer and that has a first width; a heat spreading layer that is attached to the reflector layer and the flexible printed circuit board, wherein the heat spreading layer has a second width that is less than the first width; a strip of adhesive that attaches the heat spreading layer to the flexible printed circuit board; and first and second patches of adhesive that attach the heat spreading layer to the reflector layer. - View Dependent Claims (24, 25)
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26. A display backlight comprising:
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a flexible printed circuit board; a row of light-emitting diodes mounted on the flexible printed circuit board; a light guide layer having first and second opposing surfaces connected by an edge, wherein the edge receives light from the row of light-emitting diodes; a plurality of adhesive patches that attach the first surface of the light guide layer to the flexible printed circuit board; and a patterned layer of adhesive that is formed over the row of light-emitting diodes and the second surface of the light guide layer, wherein the patterned layer of adhesive has a plurality of protruding portions and wherein each protruding portion of the plurality of protruding portions overlaps a respective adhesive patch of the plurality of adhesive patches. - View Dependent Claims (27)
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Specification