LIGHT EMITTING DEVICE
First Claim
1. A light emitting device comprising:
- a substrate;
a plurality of light emitting elements provided on a primary surface of the substrate;
at least one protective element connected in parallel with the plurality of light emitting element;
a resin frame made of a resin having a low optical transmittance, the resin frame being provided annularly on the primary surface of the substrate so as to surround a mounting area in which the plurality of light emitting elements are provided;
a fluorescent-material-containing resin layer made of a resin containing fluorescent materials, the fluorescent-material-containing resin layer being provided adjacent to an inner side of the resin frame so as to cover the plurality of light emitting elements; and
at least one first light emitting element connection electrode and at least one second light emitting element connection electrode, which are provided on the primary surface of the substrate so as to face each other along a first direction in the primary surface,the plurality of light emitting elements having such a circuit configuration that at least two series circuit sections, in each of which at least two of the plurality of light emitting elements are connected in series, are connected in parallel between the at least one first light emitting element connection electrode and the at least one second light emitting element connection electrode,the at least two series circuit sections being aligned along a second direction orthogonal to the first direction in the primary surface, between the at least one first light emitting element connection electrode and, the at least one second light emitting element connection electrode,the at least two of the plurality of light emitting elements in each of the at least two series circuit sections being aligned along the first direction,the at least one first light emitting element connection electrode and the at least one second light emitting element connection electrode being disposed below at least one of the resin frame and the fluorescent-material-containing resin layer.
4 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.
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Citations
18 Claims
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1. A light emitting device comprising:
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a substrate; a plurality of light emitting elements provided on a primary surface of the substrate; at least one protective element connected in parallel with the plurality of light emitting element; a resin frame made of a resin having a low optical transmittance, the resin frame being provided annularly on the primary surface of the substrate so as to surround a mounting area in which the plurality of light emitting elements are provided; a fluorescent-material-containing resin layer made of a resin containing fluorescent materials, the fluorescent-material-containing resin layer being provided adjacent to an inner side of the resin frame so as to cover the plurality of light emitting elements; and at least one first light emitting element connection electrode and at least one second light emitting element connection electrode, which are provided on the primary surface of the substrate so as to face each other along a first direction in the primary surface, the plurality of light emitting elements having such a circuit configuration that at least two series circuit sections, in each of which at least two of the plurality of light emitting elements are connected in series, are connected in parallel between the at least one first light emitting element connection electrode and the at least one second light emitting element connection electrode, the at least two series circuit sections being aligned along a second direction orthogonal to the first direction in the primary surface, between the at least one first light emitting element connection electrode and, the at least one second light emitting element connection electrode, the at least two of the plurality of light emitting elements in each of the at least two series circuit sections being aligned along the first direction, the at least one first light emitting element connection electrode and the at least one second light emitting element connection electrode being disposed below at least one of the resin frame and the fluorescent-material-containing resin layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18)
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10. The light emitting device as set forth in claim wherein the resin frame has an annular shape when viewed in a plane manner.
Specification