LIGHT EMITTING DEVICE
First Claim
1. A light emitting device comprising:
- a substrate having a rectangular outer shape in a top view;
a plurality of light emitting elements positioned around a center of a primary surface of the substrate, the plurality of light emitting elements being LED chips;
an electrode wiring pattern including a first light emitting element connection electrode and a second light emitting element connection electrode, the first light emitting element connection electrode and the second light emitting element connection electrode being an anode electrode and a cathode electrode, respectively; and
an anode-side electrode land and a cathode-side electrode land which are electrodes connected to an external voltage supply of said light emitting device, the anode-side electrode land and the cathode-side electrode land being provided near corners of the primary surface of the substrate, andthe electrode wiring pattern being a wiring pattern provided between the anode-side electrode land and the cathode-side electrode land so as to electrically connect the plurality of light emitting elements to the anode-side electrode land and the cathode-side electrode land.
2 Assignments
0 Petitions
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.
18 Citations
9 Claims
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1. A light emitting device comprising:
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a substrate having a rectangular outer shape in a top view; a plurality of light emitting elements positioned around a center of a primary surface of the substrate, the plurality of light emitting elements being LED chips; an electrode wiring pattern including a first light emitting element connection electrode and a second light emitting element connection electrode, the first light emitting element connection electrode and the second light emitting element connection electrode being an anode electrode and a cathode electrode, respectively; and an anode-side electrode land and a cathode-side electrode land which are electrodes connected to an external voltage supply of said light emitting device, the anode-side electrode land and the cathode-side electrode land being provided near corners of the primary surface of the substrate, and the electrode wiring pattern being a wiring pattern provided between the anode-side electrode land and the cathode-side electrode land so as to electrically connect the plurality of light emitting elements to the anode-side electrode land and the cathode-side electrode land. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification