Light-emitting device with transparent molding and light-blocking layer
A light-emitting device includes at least two lead electrodes, a transparent molding, a light-emitting element, a resin layer, and a light-blocking layer. The lead electrodes are disposed opposite to each other. The transparent molding is positioned between the lead electrodes and around edges of the lead electrodes to form a recess. The light-emitting element is disposed in the recess of the transparent molding. The resin layer is formed in the recess of the transparent molding and covering the light-emitting element. The light-blocking layer is disposed on the resin layer, and an upper surface of the light-blocking layer is coplanar with an upper surface of the transparent molding. The light-blocking layer covers 60%-95% of an area of an upper surface of the resin layer.
1 . A light-emitting device, comprising:
at least two lead electrodes disposed opposite to each other;
a transparent molding positioned between the lead electrodes and around edges of the lead electrodes to form a recess;
a light-emitting element disposed in the recess of the transparent molding;
a resin layer formed in the recess of the transparent molding and covering the light-emitting element; and
a light-blocking layer disposed on the resin layer, wherein an upper surface of the light-blocking layer is coplanar with an upper surface of the transparent molding;
wherein the light-blocking layer covers 60%-95% of an area of an upper surface of the resin layer.
2 . The light-emitting device according to claim 1 , wherein a material of the transparent molding is selected from transparent resin, transparent thermoplastic plastic material, PPA (polyphthalamide), or EMC (epoxy molding compound).
3 . The light-emitting device according to claim 1 , wherein the resin layer includes a fluorescent material to absorb a first light emitted by the light-emitting element and then emit a second light.
4 . The light-emitting device according to claim 1 , wherein a light emitted by the light-emitting element is transmitted through a side wall of the transparent molding.
5 . The light-emitting device according to claim 1 , wherein a surface of the resin layer away from the lead electrodes is a concave surface.
6 . The light-emitting device according to claim 1 , wherein the resin layer includes a diffusion agent, and an amount of the diffusion agent over the resin layer is 1%-10% weight percentage.
7 . The light-emitting device according to claim 1 , wherein the upper surface of the resin layer is a concave surface, and a height of the concave surface of the resin layer is same as a height of the light-blocking layer.
8 . The light-emitting device according to claim 1 , wherein the light distribution of the light-emitting device exhibits a bimodal angular intensity profile, characterized by two primary intensity peaks symmetrically located at off-center angles of the bimodal angular intensity profile, with a relative intensity dip along a central axis of the bimodal angular intensity profile.
9 . The light-emitting device according to claim 1 , wherein the light-blocking layer includes a transparent resin and a white particle, and a material of the white particle is selected from silicon dioxide, titanium dioxide, calcium carbonate, boron nitride, or their mixture.
10 . The light-emitting device according to claim 9 , wherein a weight percentage of the white particle over the light-blocking layer is 10%-50%.
11 . A light-emitting device, comprising:
at least two lead electrodes disposed opposite to each other;
a transparent molding positioned between the lead electrodes and around edges of the lead electrodes to form a recess;
a light-emitting element disposed within the recess of the transparent molding;
a resin layer formed within the recess of the transparent molding and covering the light-emitting element, wherein an upper surface of the resin layer is a concave surface; and
a light-blocking layer disposed above the resin layer and filled within the concave surface of the upper surface of the resin layer;
wherein a surface of the light-blocking layer opposite to the light-emitting element is convex.
12 . The light-emitting device according to claim 11 , wherein the transparent molding includes a sidewall made of transparent resin and a bottom layer made of metal for heat dissipation and electrical conduction.
13 . The light-emitting device according to claim 11 , wherein the resin layer has a lowest point vertically aligned with a geometric center of the light-emitting element, providing symmetrical light distribution for the light-emitting device.
14 . The light-emitting device according to claim 11 , wherein the light-blocking layer includes micro-textured surface features configured to reduce glare and enhance lateral light redirection for the light-emitting device.
15 . The light-emitting device according to claim 11 , wherein the transparent molding includes a dome-shaped curvature above the resin layer, wherein the dome-shaped curvature is configured to increase an output angle range of the light-emitting device.
16 . The light-emitting device according to claim 11 , wherein the light-emitting element emits a blue light and the resin layer includes a yellow phosphor for white light conversion.
17 . A light-emitting device, comprising:
a molded structure comprising a transparent sidewall and a metal base portion, wherein the molded structure is configured to form a recess;
a pair of lead electrodes comprising conductive metal layers formed on at least a portion of the molded structure or formed on the metal base portion, wherein the lead electrodes are electrically isolated from each other;
a light-emitting element disposed in the recess and electrically connected to the lead electrodes;
a resin layer formed in the recess and covering the light-emitting element, wherein an upper surface of the resin layer is a concave surface; and
a light-blocking layer disposed on the resin layer, wherein an upper surface of the light-blocking layer is coplanar with an upper surface of the molded structure;
wherein the light-blocking layer covers 60% to 95% of an area of the upper surface of the resin layer.
18 . The light-emitting device according to claim 17 , wherein the resin layer includes a diffusion agent, and an amount of the diffusion agent over the resin layer is 1%-10% weight percentage.
19 . The light-emitting device according to claim 17 , wherein the light-blocking layer includes a transparent resin and a white particle, and a material of the white particle is selected from silicon dioxide, titanium dioxide, calcium carbonate, boron nitride, or their mixture.
20 . The light-emitting device according to claim 17 , wherein a weight percentage of the white particle over the light-blocking layer is 10%-50%.