Backlight unit and display device having the same
First Claim
Patent Images
1. A backlight unit comprising:
- a light source configured to generate light; and
a plurality of transparent light guide members stacked so that one or more individual surfaces of each transparent light guide member contact a surface of another one of the transparent light guide members, the plurality of light guide members configured to guide the light,wherein each of the light guide members comprises;
a light incident surface for receiving incident light from the light source;
an opposite surface facing an adjacent one of the light guide members; and
a plurality of light path change patterns disposed on the opposite surface; and
wherein each light guide member is configured to transmit light from its light incident surface through the light path change patterns of its opposite surface;
wherein the light guide members further comprise;
a first light guide member comprising a first opposite surface and having a plurality of first light path change patterns disposed on the first opposite surface;
a second light guide member comprising a second opposite surface facing the first opposite surface and having a plurality of second light path change patterns disposed on the second opposite surface; and
at least one third light guide member disposed between the first light guide member and the second light guide member, wherein each third light guide member comprises;
a third opposite surface facing the first opposite surface;
a plurality of third light path change patterns disposed on the third opposite surface;
a fourth opposite surface facing the second opposite surface; and
a plurality of fourth light path change patterns disposed on the fourth opposite surface.
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Abstract
Provided are a backlight unit and a display device having the same. The backlight unit includes a light source configured to generate light and a plurality of light guide members stacked so that individual surfaces of each light guide member contact a surface of another one of the light guide members, the plurality of light guide members configured to guide the light. Each of the light guide members includes a light incident for receiving incident light from the light source, an opposite surface facing an adjacent one of the light guide members, and a plurality of light path change patterns disposed on the opposite surface. Thus, brightness of the display device may be improved.
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Citations
20 Claims
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1. A backlight unit comprising:
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a light source configured to generate light; and a plurality of transparent light guide members stacked so that one or more individual surfaces of each transparent light guide member contact a surface of another one of the transparent light guide members, the plurality of light guide members configured to guide the light, wherein each of the light guide members comprises; a light incident surface for receiving incident light from the light source; an opposite surface facing an adjacent one of the light guide members; and a plurality of light path change patterns disposed on the opposite surface; and wherein each light guide member is configured to transmit light from its light incident surface through the light path change patterns of its opposite surface; wherein the light guide members further comprise; a first light guide member comprising a first opposite surface and having a plurality of first light path change patterns disposed on the first opposite surface; a second light guide member comprising a second opposite surface facing the first opposite surface and having a plurality of second light path change patterns disposed on the second opposite surface; and at least one third light guide member disposed between the first light guide member and the second light guide member, wherein each third light guide member comprises; a third opposite surface facing the first opposite surface; a plurality of third light path change patterns disposed on the third opposite surface; a fourth opposite surface facing the second opposite surface; and a plurality of fourth light path change patterns disposed on the fourth opposite surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A display device comprising:
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a backlight unit comprising a light source configured to generate light and a plurality of transparent light guide members stacked so that one or more individual surfaces of each transparent light guide member contact a surface of another one of the transparent light guide members, the plurality of light guide members configured to guide the light, wherein each of the light guide members comprises;
a light incident surface for receiving incident light from the light source;
an opposite surface facing an adjacent one of the light guide members; and
a plurality of light path change patterns disposed on the opposite surface, each light guide member being configured to transmit light from its light incident surface through the light path change patterns of its opposite surface; anda display panel positioned to receive the light from the backlight unit so as to display an image; wherein the light guide members further comprise; a first light guide member comprising a first opposite surface and having a plurality of first light path change patterns disposed on the first opposite surface; a second light guide member comprising a second opposite surface facing the first opposite surface and having a plurality of second light path change patterns disposed on the second opposite surface; and at least one third light guide member disposed between the first light guide member and the second light guide member, wherein each third light guide member comprises; a third opposite surface facing the first opposite surface; a plurality of third light path change patterns disposed on the third opposite surface; a fourth opposite surface facing the second opposite surface; and a plurality of fourth light path change patterns disposed on the fourth opposite surface.
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Specification