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Light-emitting element, light-source apparatus and projection-type display apparatus

A technology of light-emitting components and optical components, applied in electroluminescent light sources, light sources, electric light sources, etc., can solve problems such as limitations, achieve high directivity, improve brightness and directivity, and high brightness effects

Inactive Publication Date: 2012-11-21
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Furthermore, as described in Non-Patent Document 1, LED projectors are limited by etendue determined by the product of the area of ​​the light source device and the emission angle

Method used

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  • Light-emitting element, light-source apparatus and projection-type display apparatus
  • Light-emitting element, light-source apparatus and projection-type display apparatus
  • Light-emitting element, light-source apparatus and projection-type display apparatus

Examples

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no. 1 example ）

[0057] Figure 3A is a schematic diagram schematically showing the configuration of the light emitting element according to the first embodiment of the present invention. Figure 3B is a plan view schematically showing the light emitting element according to the first embodiment of the present invention. Because the individual layers of the light-emitting element are very thin and their thicknesses vary greatly, it is difficult to draw precise proportions of the individual layers. Therefore, in the drawings, the respective layers are not drawn in actual scale but are schematically shown.

[0058] Such as Figure 3A As shown, the light-emitting element 1 according to the first embodiment has a light source layer 4 and a direction control layer 5 which is stacked on the light source layer 4 and performed as an optical element layer into which light from the light source layer 4 enters. Work.

[0059] Light source layer 4 has substrate 10 and a pair of hole transport layer 11...

no. 2 example ）

[0102] Figure 4A is a perspective view schematically showing a light emitting element according to a second embodiment of the present invention. Figure 4B is a plan view schematically showing the light emitting element according to the second embodiment.

[0103] Such as Figure 4A and Figure 4B As shown, the optical element 2 according to the second embodiment has a light source layer 24 and a direction control layer 5 which is stacked on the light source layer 24 and into which light from the light source layer 24 enters. Since the directional control layer 5 of the optical element 2 according to the second embodiment is the same as that of the first embodiment, description of the directional control layer 5 will be omitted. Light source layer 24 of optical element 2 according to the second embodiment differs from light source layer 4 according to the first embodiment only in that active layer 12 is formed between hole transport layer 11 and electron transport layer 13...

no. 3 example ）

[0112] Figure 6A is a perspective view schematically showing a light emitting element according to a third embodiment of the present invention. Figure 6B is a plan view schematically showing the light emitting element according to the third embodiment.

[0113] Such as Figure 6A and Figure 6B As shown, the light emitting element 3 according to the third embodiment has a light source layer 34 and a direction control layer 5 which is stacked on the light source layer 34 and into which light from the light source layer 34 enters. Since the directional control layer 5 of the optical element 3 according to the third embodiment is the same as that of the first embodiment, description of the directional control layer 5 will be omitted. Light source layer 34 of optical element 3 according to the third embodiment differs from light source layer 24 according to the second embodiment only in that anode layer 29 (which serves as an anode) is completely formed between substrate 10 a...

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Abstract

Equipped is a light-source layer (4) and a directional-control layer (5) that incidences light from the light-source layer (4). The light-source layer (4) has a pair of hole-transport layers (11) disposed on a substrate (10), and an electron transport layer (13). The directional-control layer (5) includes plasmon excitation layer (15), laminated at a side opposite the substrate (10) side on the light-source layer (4), having a plasma frequency higher than a light frequency emitted from a light-source layer (4); and a wave number vector conversion layer (17) that converts and emits a surface plasmon generated by the plasmon excitation layer (15), to a predetermined angle of emergence. The plasmon excitation layer (15) is sandwiched between two layers having dielectric properties. An effective dielectric constant of an incidence side portion including an overall structure laminated on the light-source layer (4) side of the plasmon excitation layer (15) is higher than an effective dielectric constant of an emitting side portion that includes an overall structure laminated to a wave number vector conversion layer (17) of the plasmon excitation layer (15), and a medium that touches the wave number vector conversion layer (17).

Description

technical field [0001] The present invention relates to a light-emitting element, a light source device, and a projection display device that emit light using surface plasmons. Background technique [0002] There has been proposed an LED projector that uses a light emitting diode (LED) as a light emitting element for a light source. This type of LED projector includes: an illumination optical system (into which the light from the LED enters); a light valve with a liquid crystal display panel (into which the light from the illumination optical system enters) and a DMD (Digital Micromirror Device); A projection optical system that projects light from the light valve onto a projection plane. [0003] A requirement for an LED projector is to minimize light loss on the light path from the LED to the light valve to improve the brightness of the projected image. [0004] Furthermore, as described in Non-Patent Document 1, the LED projector is limited by etendue determined by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/02H01L33/36H01L51/50
CPCH01L51/5268H01L33/58H01L33/04H01L2933/0016H10K50/854
Inventor 枣田昌尚今井雅雄铃木尚文富永慎
Owner NEC CORP
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