Light emitting panel assemblies
DC
First Claim
Patent Images
1. A light emitting panel assembly comprising:
- a light emitting panel member comprising a first major surface, a second major surface opposite the first major surface, and a light transition area that is an integral extension of the light emitting panel member at an end thereof;
an optical film or sheet overlying the first major surface; and
LED light sources optically coupled to the light transition area such that light emitted from the LED light sources is mixed and transmitted by the light transition area to the light emitting panel member as a whole, wherein;
the light emitting panel member has a pattern of light extracting deformities on or in at least one of the major surfaces, the light extracting deformities are configured to cause light to be emitted from the first major surface with a predetermined light ray angle distribution; and
the light transition area has faceted refractive surfaces associated with each LED light source that redirect the light entering the light emitting panel member; and
wherein there is a pattern of light extracting deformities on or in the first major surface and the second major surface, the light extracting deformities on or in the first major surface being different from the light extracting deformities on or in the second major surface.
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Abstract
Light emitting assembly includes an optical conductor having a pattern of deformities on or in front and back sides of the optical conductor to cause light to be emitted from a light emitting surface on at least one of the sides. At least one of the deformities varies, and at least one planar or curved refractive surface is aligned with at least one light source to redirect a portion of the light from the light source entering the optical conductor in a predetermined manner to cause the light emitted from the light emitting surface to pass through an optical film, which redirects the light through a liquid crystal display with no loss.
173 Citations
19 Claims
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1. A light emitting panel assembly comprising:
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a light emitting panel member comprising a first major surface, a second major surface opposite the first major surface, and a light transition area that is an integral extension of the light emitting panel member at an end thereof; an optical film or sheet overlying the first major surface; and LED light sources optically coupled to the light transition area such that light emitted from the LED light sources is mixed and transmitted by the light transition area to the light emitting panel member as a whole, wherein; the light emitting panel member has a pattern of light extracting deformities on or in at least one of the major surfaces, the light extracting deformities are configured to cause light to be emitted from the first major surface with a predetermined light ray angle distribution; and the light transition area has faceted refractive surfaces associated with each LED light source that redirect the light entering the light emitting panel member; and wherein there is a pattern of light extracting deformities on or in the first major surface and the second major surface, the light extracting deformities on or in the first major surface being different from the light extracting deformities on or in the second major surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light emitting panel assembly comprising:
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a light emitting panel member comprising a first major surface, a second major surface opposite the first major surface, and a light transition area that is an integral extension of the light emitting panel member at an end thereof; an optical film or sheet overlying the first major surface; and LED light sources optically coupled to the light transition area such that light emitted from the LED light sources is mixed and transmitted by the light transition area to the light emitting panel member as a whole, wherein; the light emitting panel member has a pattern of light extracting deformities on or in at least one of the major surfaces, the light extracting deformities are configured to cause light to be emitted from the first major surface with a predetermined light ray angle distribution; and the light transition area has faceted refractive surfaces associated with each LED light source that redirect the light entering the light emitting panel member; and wherein the pattern of light extracting deformities varies in refractive index.
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11. A light emitting panel assembly comprising:
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a light emitting panel member comprising a first major surface, a second major surface opposite the first major surface, and a light transition area that is an integral extension of the light emitting panel member at an end thereof; an optical film or sheet overlying the first major surface; and LED light sources optically coupled to the light transition area such that light emitted from the LED light sources is mixed and transmitted by the light transition area to the light emitting panel member as a whole, wherein; the light emitting panel member has a pattern of light extracting deformities on or in at least one of the major surfaces, the light extracting deformities are configured to cause light to be emitted from the first major surface with a predetermined light ray angle distribution; and the light transition area has faceted refractive surfaces associated with each LED light source that redirect the light entering the light emitting panel member; and wherein there is an air gap between the light emitting panel member and the film or sheet, the film or sheet having a pattern of deformities on one side of the film or sheet, the deformities on the film or sheet having a width and length that is quite small in relation to a width and length of the film or sheet, the deformities on the film or sheet vary at different locations on the film or sheet to direct the light emitted by the first major surface of the light emitting panel member in different directions to produce a desired light output distribution. - View Dependent Claims (12, 13, 14)
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15. A light emitting panel assembly comprising:
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a light emitting panel member comprising a first major surface, a second major surface opposite the first major surface, and a light transition area that is an integral extension of the light emitting panel member at an end thereof; an optical film or sheet overlying the first major surface; and LED light sources optically coupled to the light transition area such that light emitted from the LED light sources is mixed and transmitted by the light transition area to the light emitting panel member as a whole, wherein; the light emitting panel member has a pattern of light extracting deformities on or in at least one of the major surfaces, the light extracting deformities are configured to cause light to be emitted from the first major surface with a predetermined light ray angle distribution; and the light transition area has faceted refractive surfaces associated with each LED light source that redirect the light entering the light emitting panel member; and wherein the LED light sources are configured to generate light having an output distribution defined by a greater width component than height component, the height component of the LED light sources corresponding to a thickness direction of the light emitting panel member. - View Dependent Claims (16, 17, 18, 19)
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Specification
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Litigation Data
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Current AssigneeInnovative Display Technologies LLC (Acacia Research Corporation)
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Original AssigneeRambus International Ltd (Rambus Inc.)
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InventorsParker, Jeffery R.
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Primary Examiner(s)Sember, Thomas M
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Application NumberUS12/724,039Publication NumberTime in Patent Office463 DaysField of Search362/26, 362/606, 362/607, 362/608, 362/609, 362617-626 D, 362/627, 362/612, 362/613US Class Current362/607CPC Class CodesA61B 2090/309 using white LEDsA61M 2021/0044 by the sight senseA61M 21/02 for inducing sleep or relax...A61N 2005/063 comprising light transmitti...A61N 2005/0652 Arrays of diodesA61N 5/0621 Hyperbilirubinemia, jaundic...F21V 5/10 comprising photoluminescent...G02B 6/0018 Redirecting means on the su...G02B 6/002 by shaping at least a porti...G02B 6/0021 for housing at least a part...G02B 6/0028 Light guide, e.g. taperG02B 6/0031 Reflecting element, sheet o...G02B 6/0036 2-D arrangement of prisms, ...G02B 6/0038 Linear indentations or groo...G02B 6/0043 provided on the surface of ...G02B 6/006 to produce indicia, symbols...G02B 6/0061 to provide homogeneous ligh...G02B 6/0068 Arrangements of plural sour...H01H 2219/062 Light conductorH01H 2221/07 transparentView All
