LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREFOR
First Claim
1. A light emitting device comprising:
- a first electrode;
a second electrode; and
a light emitting diode circuit which has at least one parallel structure unit composed of a plurality of light emitting diodes connected in parallel between the first electrode and the second electrode, and which is connected between the first electrode and the second electrode, whereinthe plurality of light emitting diodes making up the parallel structure unit comprise;
first light emitting diodes which are placed so as to be forward oriented when the first electrode is set higher in potential than the second electrode, andsecond light emitting diodes which are placed so as to be forward oriented when the second electrode is set higher in potential than the first electrode, and whereinin the parallel structure unit,the first light emitting diodes and the second light emitting diodes are mixedly placed, andthe plurality of light emitting diodes are driven with an AC voltage applied to between the first electrode and the second electrode by AC power supply.
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Accused Products
Abstract
In a light emitting device, a P-type first region (506) and a P-type third region (508) are placed on both sides of an N-type second region (507) of a rod-like light emitting element (505). Therefore, even if connection of the first, third regions (506, 508) of the rod-like light emitting element (505) relative to the first, third electrodes (1, 3) is reversed, a diode polarity relative to the first, third electrodes (501, 503) is not reversed, making it possible to effectuate normal light emission. Thus, a connection of the first, third regions (506, 508) relative to the first, third electrodes (501, 503) may be reversed during a manufacturing process, making it unnecessary to provide marks or configurations for discrimination of orientation of the rod-like light emitting element (505), so that the manufacturing process can be simplified and manufacturing cost can be cut down.
87 Citations
29 Claims
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1. A light emitting device comprising:
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a first electrode; a second electrode; and a light emitting diode circuit which has at least one parallel structure unit composed of a plurality of light emitting diodes connected in parallel between the first electrode and the second electrode, and which is connected between the first electrode and the second electrode, wherein the plurality of light emitting diodes making up the parallel structure unit comprise; first light emitting diodes which are placed so as to be forward oriented when the first electrode is set higher in potential than the second electrode, and second light emitting diodes which are placed so as to be forward oriented when the second electrode is set higher in potential than the first electrode, and wherein in the parallel structure unit, the first light emitting diodes and the second light emitting diodes are mixedly placed, and the plurality of light emitting diodes are driven with an AC voltage applied to between the first electrode and the second electrode by AC power supply. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A manufacturing method for light emitting devices, comprising the steps of:
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preparing a substrate having a first electrode and a second electrode; coating the substrate with a solution containing a plurality of light emitting diodes having a maximum size of 100 μ
m or less; andapplying a voltage to the first electrode and the second electrode to make the light emitting diodes arrayed into positions defined by the first, second electrodes.
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20. A light emitting device comprising:
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a first electrode formed on a substrate; a second electrode formed on the substrate; a third electrode formed on the substrate; and a rod-like light emitting element which has a first-conductive-type first region, a second-conductive-type second region, and a first-conductive-type third region and in which the first region, the second region and the third region are placed in an order of the first region, the second region and the third region, wherein the first region is connected to one of the first electrode and the third electrode, the second region is connected to the second electrode, and the third region is connected to the other of the first electrode and the third electrode. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. A manufacturing method for light emitting devices, comprising the steps of:
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preparing a substrate having a first electrode, a second electrode, and a third electrode; coating the substrate with a solution containing a plurality of rod-like light emitting elements having a maximum size of 100 μ
m or less, the rod-like light emitting elements each having a first-conductive-type first region, a second-conductive-type second region, and a first-conductive-type third region, where the first region, the second region and the third region are placed in an order of the first region, the second region and the third region, andapplying a voltage to the first electrode and the third electrode to make the plurality of rod-like light emitting elements arrayed into positions defined by the first, second and third electrodes.
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Specification