Surface light guide and planar emitter
First Claim
Patent Images
1. A surface light guide, comprising:
- a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in radiation;
scattering locations for scattering the coupled-in radiation;
a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction;
a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface; and
a separating film arranged between the first layer and the second layer;
wherein the surface light guide is provided for coupling in radiation having a first radiation component and a second radiation component; and
wherein the first layer and the second layer are decoupled from one another with regard to the light guidance.
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Abstract
A surface light guide has a radiation exit area extending along a main extension plane of the surface light guide and is provided for laterally coupling radiation. The surface light guide includes scattering locations for scattering the coupled radiation. The surface light guide includes a first boundary surface and a second boundary surface which delimit the light conductance of the coupled-in radiation in the vertical direction. A first layer and a second layer are formed on each other in the vertical direction between the first boundary surface and the second boundary surface. Further disclosed are a planar emitter including at least one surface light guide.
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Citations
20 Claims
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1. A surface light guide, comprising:
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a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in radiation; scattering locations for scattering the coupled-in radiation; a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction; a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface; and a separating film arranged between the first layer and the second layer; wherein the surface light guide is provided for coupling in radiation having a first radiation component and a second radiation component; and wherein the first layer and the second layer are decoupled from one another with regard to the light guidance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A planar emitter comprising:
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a first surface light guide; a second surface light guide; and at least one radiation source, wherein radiation coupled into the first surface light guide during operation of the planar emitter is generated by the radiation source and wherein the radiation coupled into the second surface light guide during operation of the planar emitter is generated by the radiation source; wherein the first surface light guide comprises; a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in the radiation; scattering locations for scattering the coupled-in radiation; a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction; and a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface. - View Dependent Claims (15)
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16. A surface light guide, comprising:
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a radiation exit area running along a main extension plane of the surface light guide and being provided for laterally coupling in radiation; scattering locations for scattering the coupled-in radiation; a first interface and a second interface, which delimit light guidance of the coupled-in radiation in a vertical direction; a first layer and a second layer formed one on top of the other in the vertical direction between the first interface and the second interface; and a further layer arranged on that side of the first layer that faces away from the second layer, wherein the first layer has a higher refractive index than the second layer and the further layer, wherein the surface light guide is provided for coupling in radiation having a first radiation component and a second radiation component. - View Dependent Claims (17, 18, 19, 20)
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Specification