Backlight wedge with encapsulated light source
First Claim
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1. A backlight comprising:
- a visible light transmissive body primarily propagating light by TIR having a light guide portion and a light input portion, the light guide portion having a light reflection surface and a light emission surface, and the light input portion having opposing side surfaces that are not parallel;
a light source well formed in one of the light input portion surfaces, the light source well including a light source well surface;
a light source extending into the light source well, the light source emitting light into the light input portion;
an encapsulant disposed between the light source and the light source well surface; and
a specularly reflective film or layer disposed adjacent to the opposing side surfaces, reflecting more than 80% of light, that is emitted from the light source and escapes through the opposing side surfaces, back into the visible light transmissive body.
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Accused Products
Abstract
A backlight may include a light guide and a light input. The light guide may have a light reflection surface and a light emission surface. The light input may include a diverging wedge having a narrow end and opposing side surfaces extending to the narrow end. A light source well may be formed in the light input, and a light source may be disposed within the light source well. An encapsulant may be disposed about the light source, within the light source well. A specularly reflective film or layer may be disposed adjacent to but not in intimate contact with the opposing side surfaces and may reflect more than 80% of visible light incident on the multilayer polymeric mirror film.
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Citations
24 Claims
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1. A backlight comprising:
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a visible light transmissive body primarily propagating light by TIR having a light guide portion and a light input portion, the light guide portion having a light reflection surface and a light emission surface, and the light input portion having opposing side surfaces that are not parallel; a light source well formed in one of the light input portion surfaces, the light source well including a light source well surface; a light source extending into the light source well, the light source emitting light into the light input portion; an encapsulant disposed between the light source and the light source well surface; and a specularly reflective film or layer disposed adjacent to the opposing side surfaces, reflecting more than 80% of light, that is emitted from the light source and escapes through the opposing side surfaces, back into the visible light transmissive body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A backlight comprising:
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a diverging wedge primarily propagating light by TIR and defined by a narrow end surface and a wide end surface, and opposing side surfaces that are not parallel and extend between the narrow end and the wide end; a light source well formed in one of the wedge surfaces, the light source well including a light source well surface; a light source extending into the light source well, the light source emitting light into the diverging wedge; an encapsulant disposed between the light source and the light source well surface; a light guide optically coupled to the wide end surface, the light guide having a light reflection surface and a light emission surface; and a specularly reflective film or layer disposed adjacent to the opposing side surfaces, reflecting more than 80% of light, that is emitted from the light source and escapes through the opposing side surfaces, back into the visible light transmissive body. - View Dependent Claims (17, 18)
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19. A backlight comprising:
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a first diverging wedge primarily propagating light by TIR and defined by a first narrow end surface and a first wide end surface, and first non-parallel opposing side surfaces that extend between the first narrow end and the first wide end; a first light source well formed in one of the first diverging wedge surfaces, the first light source well including a first light source well surface; a first light source extending into the first light source well, the first light source emitting light into the first diverging wedge; a first encapsulant disposed between the first light source and the first light source well surface; a second diverging wedge defined by a second narrow end surface and a second wide end surface, and second non-parallel opposing side surfaces that extend between die second narrow end and the second wide end; a second light source well formed in one of the second diverging wedge surfaces, the second light source well including a second light source well surface; a second light source extending into the second light source well, the second light source emitting light into the second diverging wedge; a second encapsulant disposed between the second light source and the second light source well surface; at light guide optically coupled to the first wide end surface and the second wide end surface, the light guide having a light reflection surface and a light extraction surface; and a specularly reflective film or layer disposed adjacent to the opposing side surfaces, reflecting more than 80% of light, that is emitted from the light source and escapes through the opposing side surfaces, back into the visible light transmissive body. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification