Light emitting diode device having advanced light extraction efficiency and preparation method thereof
First Claim
1. A light emitting diode device comprising:
- (a) a light emitting diode unit and (b) an adjustment layer laminated on a light emitting surface of the light emitting diode unit, a fine pattern having being formed on the adjustment layer by repeating a shape in a light emission direction, wherein the adjustment layer is (i) at least one layer formed by aligning transparency adjustment particles having a shape or (ii) a polymer film layer having a fine pattern imprinted on the polymer film layer so as to adjust transparency.
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Accused Products
Abstract
Disclosed is an LED device, a method for manufacturing the same, and a light emitting apparatus having the same. The LED device includes (a) a light emitting diode unit and (b) an adjustment layer laminated on a light emitting surface of the light emitting diode unit, a fine pattern having being formed on the adjustment layer by repeating a shape in a light emission direction. The adjustment layer is (i) at least one layer formed by aligning transparency adjustment particles having a shape or (ii) a polymer film layer having a fine pattern imprinted on the polymer film layer so as to adjust transparency. A fine pattern adjustment layer having various shapes and an adjustable size is introduced on the light emitting surface of the LED unit. As a result, the light extraction efficiency of the surface of the LED unit improves together with ease of manufacturing and secured uniformity.
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Citations
21 Claims
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1. A light emitting diode device comprising:
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(a) a light emitting diode unit and (b) an adjustment layer laminated on a light emitting surface of the light emitting diode unit, a fine pattern having being formed on the adjustment layer by repeating a shape in a light emission direction, wherein the adjustment layer is (i) at least one layer formed by aligning transparency adjustment particles having a shape or (ii) a polymer film layer having a fine pattern imprinted on the polymer film layer so as to adjust transparency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for manufacturing a light emitting diode device having a transparency adjustment layer formed on a light emitting surface of a light emitting diode unit, the method comprising the steps of:
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(a) applying a slurry to a substrate, the slurry containing a transparent polymer or the polymer and transparency adjustment particles;
(b) compressing a surface of the substrate, the slurry having been applied to the surface, by using a stamp having a fine pattern carved on a surface;
(c) shaping a fine pattern by means of hardening based on UV rays or heat and separating a film from the stamp, a fine pattern having been imprinted on the film; and
(d) attaching a polymer film, the fine pattern having been imprinted on the polymer film, or a film containing the polymer and the transparency adjustment particles to a light emitting surface of a light emitting diode unit.
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20. A method for manufacturing a light emitting diode device having a transparency adjustment layer formed on a light emitting surface of a light emitting diode unit, the method comprising the steps of:
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(a) preparing a transparent polymer substrate with or without transparency adjustment particles;
(b) compressing a surface of the substrate by using a stamp having a fine pattern carved on a surface;
(c) shaping a fine pattern by means of hardening based on UV rays or heat so that the fine pattern is imprinted on a surface of the substrate; and
(d) attaching the polymer substrate to a light emitting surface of a light emitting diode unit, the substrate having the fine pattern imprinted on the surface and containing a polymer or the polymer and the transparency adjustment particles.
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21. A polymer film or substrate with or without transparency adjustment particles, comprising:
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(a) a film or substrate having a fine pattern imprinted on a surface so as to adjust a surface structure of a light emitting diode unit, the film or substrate containing a polymer or the polymer and transparency adjustment particles, and (b) a polymer film with no fine pattern or a release film removably attached to a surface of the substrate.
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Specification