US 9,853,196 B2Granted

Light-emitting display device

AssigneesLite-On Opto Technology (Changzhou) Co., Ltd., Lite-On Technology Corporation

InventorsHung-Jui Chen, Kuo-Ming Chiu, Shih-Chiang Yen

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Abstract

A light-emitting display device includes a substrate, several light emitting units for emitting light with different wavelengths, and an optical lens. The substrate has at least one receiver for containing these light emitting units. A light guide structure of the light-emitting display device can be the receiver with a specific designed, a frame body with at least one corresponding through hole formed on the corresponding receiver, or at least one optical element formed on the corresponding receiver, so as the light emitted by the light emitting units can be reflected towards the preset optical axis. And the optical lens is formed on the light guide structure as medium for mixing lights of different wavelengths for achieving a uniform lighting effect.

Claims18

Dependent claims

A light-emitting display device, comprising:

a substrate, having a first substrate surface and a second substrate surface located at opposite sides, wherein the substrate has a preset optical axis perpendicular to the first substrate surface, and at least one receiver is recessed from the first substrate surface of the substrate;
wherein a side wall of the receiver has an inner light reflecting portion proximal to the optical axis and an outer light reflecting portion distal from the optical axis, an angle defined by the inner light reflecting portion and a bottom wall of the receiver is greater than an angle defined by the outer light reflecting portion and the bottom wall of the receiver, and the angle defined by the outer light reflecting portion and the bottom wall of the receiver is not less than 90 degrees;
a plurality of light emitting units, wherein the light emitting units has at least one first light emitting unit emitting first light with a first spectrum and at least one second light emitting unit emitting second light with a second spectrum different to the first spectrum, wherein the light emitting units are disposed in the receiver of the substrate and the height of each of the light emitting units is less than the depth of the receiver;
wherein the inner light reflecting portion and the outer light reflecting portion enable light emitted by the light emitting units to be reflected towards the optical axis;
and
an optical lens disposed over the substrate for mixing the first and the second light emitted from the light emitting units.

3 more elements

A light-emitting display device, comprising:

a substrate, having a first substrate surface and a second substrate surface located at opposite sides, wherein the substrate has a preset optical axis perpendicular to the first substrate surface at an approximate center of the first substrate surface, and a plurality of receivers are recessed from the first substrate surface of the substrate;
a plurality of light emitting units, wherein the light emitting units has at least one first light emitting unit emitting first light with a first spectrum and at least one second light emitting unit emitting second light with a second spectrum different to the first spectrum, wherein the light emitting units are disposed in the receivers respectively and the height of any of the light emitting units is less than the depth of the corresponding receiver;
and
an optical element, comprising a plurality of light guide posts, wherein each of the light guide posts has a light input end and a light output end, the light input ends of the light guide posts face the light emitting units respectively, and the light output ends of the light guide posts are disposed adjacent to each other;
wherein the optical element enables light emitted by the light emitting units to be respectively guided by the light guide posts and transferred from the light input ends to the light output ends;
and
an optical lens disposed over the substrate for mixing the first and the second light emitted from the light emitting units.

4 more elements

Dependencies are inferred from the claim text.