Light emitting device
DCFirst Claim
1. A light emitting device comprising:
- a ceramic substrate having a primary surface;
a plurality of LED chips positioned around a center of the primary surface of said substrate;
a plurality of wires for connecting the plurality of LED chips with each other, each of said plurality of wires being directly connected between two of the plurality of LED chips;
a resin frame formed on the primary surface of said substrate and provided annularly so as to surround a mounting area in which the plurality of LED chips are provided, said resin frame having light reflectivity, and wherein the resin frame has a circular shape in a top view and a dome shape in a cross-sectional view;
a sealing resin provided on the mounting area and inside said resin frame, and wherein the top of said sealing resin is higher than the top of said resin frame;
an anode-side electrode land and a cathode-side electrode land which are electrodes to be connected to an external voltage supply, and are electrically connected to the plurality of LED chips, said anode-side electrode land and said cathode-side electrode land being provided on the primary surface of said substrate and outside said resin frame; and
an electrode wiring pattern on the primary surface of the substrate including (i) an anode pattern extending from the anode-side electrode land to a portion under said resin frame, and (ii) a cathode pattern extending from the cathode-side electrode land to the other portion under the resin frame, so as to electrically connect the plurality of LED chips to the anode-side electrode land and the cathode-side electrode land.
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Accused Products
Abstract
A light emitting device includes: a ceramic substrate; a plurality of LED chips; a printed resistor(s) connected in parallel with the plurality of LED chips; a dam resin made of a resin having a low optical transmittance; a fluorescent-material-containing resin layer; and an anode-side electrode and a cathode-side electrode, (a) which are provided on a primary surface of the ceramic substrate so as to face each other along a first direction on the primary surface and (b) which are disposed below at least one of the dam resin and the fluorescent-material-containing resin layer. With the configuration in which a plurality of LEDs, which are connected in a series-parallel connection, are provided on a substrate, it is possible to provide a light emitting device which can achieve restraining of luminance unevenness and an improvement in luminous efficiency.
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Citations
16 Claims
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1. A light emitting device comprising:
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a ceramic substrate having a primary surface; a plurality of LED chips positioned around a center of the primary surface of said substrate; a plurality of wires for connecting the plurality of LED chips with each other, each of said plurality of wires being directly connected between two of the plurality of LED chips; a resin frame formed on the primary surface of said substrate and provided annularly so as to surround a mounting area in which the plurality of LED chips are provided, said resin frame having light reflectivity, and wherein the resin frame has a circular shape in a top view and a dome shape in a cross-sectional view; a sealing resin provided on the mounting area and inside said resin frame, and wherein the top of said sealing resin is higher than the top of said resin frame; an anode-side electrode land and a cathode-side electrode land which are electrodes to be connected to an external voltage supply, and are electrically connected to the plurality of LED chips, said anode-side electrode land and said cathode-side electrode land being provided on the primary surface of said substrate and outside said resin frame; and an electrode wiring pattern on the primary surface of the substrate including (i) an anode pattern extending from the anode-side electrode land to a portion under said resin frame, and (ii) a cathode pattern extending from the cathode-side electrode land to the other portion under the resin frame, so as to electrically connect the plurality of LED chips to the anode-side electrode land and the cathode-side electrode land. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification