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US 12,205,933 B2Granted
Light emitting device for display and led display apparatus having the same
AssigneeSeoul Viosys Co., Ltd.
InventorsJong Min Jang, Chang Yeon Kim
Life of this patent
Estimating the term…
Abstract
A light emitting device including first, second, and third light emitting stacks each including first and second conductivity type semiconductor layers, a first lower contact electrode in ohmic contact with the first light emitting stack, and second and third lower contact electrodes respectively in ohmic contact with the second conductivity type semiconductor layers of the second and third light emitting stacks, in which the first lower contact electrode is disposed between the first and second light emitting stacks, the second and third lower contact electrodes are disposed between the second and third light emitting stacks, and the first, second, and third lower contact electrodes include transparent conductive oxide layers.
Claims20
A display apparatus, comprising:
- a circuit board including an upper surface and electrodes;
- a first light emitter, a second light emitter, and a third light-emitter disposed on an upper surface of the circuit board and electrically connected to the electrodes, each light emitter including a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first and second conductivity type semiconductor layers;
- a first lower contact electrode in ohmic contact with the first light emitter;
- a second lower contact electrode in ohmic contact with the second light emitter;
- a third lower contact electrode in ohmic contact with the third light emitter;
- a first connection electrode electrically connected to the first light emitter;
- a second connection electrode electrically connected to the second light emitter;
- and
- a third connection electrode electrically connected to the third light emitter, wherein:
- the second light emitter is disposed between the first light emitter and the third light emitter;
- the first lower contact electrode is disposed between the first light emitter and the second light emitter;
- the second lower contact electrode is disposed between the second light emitter and the third light emitter;
- the first lower contact electrode, the second lower contact electrode, and the third lower contact electrode include transparent conductive oxide layers;
- a thickness of the second lower contact electrode or the third lower contact electrode is different from a thickness of the first lower contact electrode;
- and
- each of the first, second, and third connection electrodes includes a first surface that faces the upper surface of the circuit board and a second surface disposed opposite to the first surface, and an area of the second surface is greater than an area of the first surface.
13 more elements
A display apparatus, comprising:
- a circuit board including an upper surface and electrodes;
- a first light emitter, a second light emitter, and a third light emitter disposed on an upper surface of the circuit board and electrically connected to the electrodes, each light emitter including a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first and second conductivity type semiconductor layers;
- a first lower contact electrode in ohmic contact with the first light emitter;
- a second lower contact electrode in ohmic contact with the second light emitter;
- a third lower contact electrode in ohmic contact with the third light emitter;
- a first connection electrode electrically connected to the first light emitter;
- a second connection electrode electrically connected to the second light emitter;
- a third connection electrode electrically connected to the third light emitter;
- and
- protectors covering at least a portion of the first, second, and third connection electrodes respectively, wherein:
- the first lower contact electrode, the second lower contact electrode, and the third lower contact electrode include transparent conductive oxide layers;
- a thickness of the second lower contact electrode or the third lower contact electrode is different from a thickness of the first lower contact electrode;
- the first lower contact electrode is disposed between the first light emitter and the second light emitter;
- the second lower contact electrode is disposed between the second light emitter and the third light emitter;
- and each of the first, second, and third connection electrodes includes a first surface that faces to the upper surface of the circuit board and a second surface disposed opposite to the first surface, and an area of the second surface is greater than an area of the first surface exposed by the protector.
12 more elements
A light emitting apparatus, comprising:
- a circuit board including an upper surface and electrodes;
- a first light emitter, a second light emitter, and a third light emitter disposed on an upper surface of the circuit board and electrically connected to the electrodes, each including a first conductivity type semiconductor layer, a second conductivity type semiconductor layer, and an active layer disposed between the first and second conductivity type semiconductor layers;
- a first lower contact electrode in ohmic contact with the first light emitter;
- a second lower contact electrode in ohmic contact with the second light emitter;
- a third lower contact electrode in ohmic contact with the third light emitter;
- the first lower contact electrode is disposed between the first light emitter and the second light emitter;
- the second lower contact electrode is disposed between the second light emitter and the third light emitter;
- a first connection electrode electrically connected to the first light emitter;
- a second connection electrode electrically connected to the second light emitter;
- a third connection electrode electrically connected to the third light emitter;
- and
- protectors covering at least a portion of the first, second, and third connection electrodes, respectively, wherein:
- the first lower contact electrode, the second lower contact electrode, and the third lower contact electrode include transparent conductive oxide layers;
- and
- each of the first, second, and third connection electrodes includes a first surface that faces the upper surface of the circuit board and a second surface disposed opposite to the first surface, and an area of the second surface is greater than an area of the first surface exposed by the protector.
12 more elements
Dependencies are inferred from the claim text.