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Light emitting device

一种发光装置、发光元件的技术，应用在发光材料、节能措施、园艺等方向，能够解决驱动电路复杂化、部件个数增加、成本变高等问题，达到培育效率提升的效果

Inactive Publication Date: 2015-08-26
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a configuration including a plurality of light-emitting elements, the complexity of the drive circuit and the increase in the number of parts due to the electrical characteristics and temperature characteristics of each light-emitting element increase the cost.

Method used

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Experimental program
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Effect test

no. 1 Embodiment approach

[0050] Before describing the first embodiment of the light-emitting device of the present invention, cultivation of plants will be briefly described. Light functions as a stimulus and information source for germination, flowering, stem elongation, and the like. Photosynthesis of plants is carried out through the absorption of light by chlorophyll. There are two wavelength regions in which the absorption of light by chlorophyll peaks. The first region is in the range of wavelength 400nm to 500nm (more specifically, near the wavelength of 450nm), and the second region is in the wavelength range of 600nm to 700nm (more specifically, near the wavelength of 660nm).

[0051] The light in the first region (blue light) is light required for normal morphological formation of leaves and the like, and the light in the second region (red light) is light required for photosynthesis. In addition, when plants are irradiated with mixed light, far-red light is required for pitch elongation and...

no. 2 Embodiment approach

[0074] Figure 5 It is a top view showing the light emitting device of the second embodiment. Figure 6 yes Figure 5 Side view under XY section at A-A of the light-emitting device shown. Since the LEDs mounted on the board are the same as those in the first embodiment, illustration is omitted. In addition, a part of description will be omitted about the part whose structure is the same as that of 1st Embodiment.

[0075] The phosphor layer 6 is a resin layer filled inside a resin frame 7 described later so as to cover the LED 5 . Phosphor layer 6 is excited by light (excitation light) emitted from LED 5 to emit light having a peak wavelength in a predetermined range. Phosphor layer 6 is composed of a first phosphor layer 61 and a second phosphor layer 62 . The first phosphor layer 61 is constituted by containing the first phosphor 10 ( Figure 5 The phosphors represented by Δ marks among others), the second phosphor layer 62 is constituted by containing the second phosp...

no. 3 Embodiment approach

[0092] Figure 7 It is a top view showing the light emitting device of the third embodiment. Figure 8 yes Figure 7 The side view under the XY section at B-B of the light-emitting device shown. Figure 9 It is a top view showing the LED mounted on the board in the third embodiment. Figure 10 It is a schematic diagram showing the positional relationship between the phosphor layer and the LED. in addition, Figure 10 The △ mark indicating the first phosphor 10 and the ◯ mark indicating the second phosphor 11 are omitted for easy understanding of the positional relationship between the phosphor layer and the LED.

[0093] In the second embodiment described above, the absorption of red light by the second phosphor layer 62 is suppressed by laminating the first phosphor layer 61 on the second phosphor layer 62 . In this embodiment, the absorption of red light by the second phosphor layer is suppressed without laminating the first phosphor layer and the second phosphor layer....

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Abstract

This light emitting device is provided with: a light emitting element which emits excitation light; and a far-red phosphor which is excited by the excitation light of the light emitting element and emits light that has a peak wavelength within the range of 700-800 nm. The far-red phosphor has a median diameter within the range of 1-20 μm.

Description

technical field [0001] The present invention relates to light emitting devices. Background technique [0002] The production / supply of plants such as vegetables and fruits may decrease due to climate change, pest damage, and the like. In addition, in recent years, emphasis has been placed on food safety and the improvement of food self-sufficiency, and it is expected that safe plants can be provided stably. For this reason, techniques for growing plants in factory facilities without using sunlight have been developed. [0003] In order to grow plants in a factory facility (plant factory), light (light source) that is a substitute for sunlight is required. In recent years, light-emitting elements such as LEDs (Light Emitting Diodes) have been used as light sources of lighting devices for growing plants. [0004] However, it is known that in order to efficiently grow plants in a plant factory, light having peak wavelengths (wavelengths at which the relative radiation intens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50A01G7/00C09K11/08
CPCC09K11/7734H01L25/0753H01L33/508H01L2224/48091H01L33/504A01G7/045C09K11/7708H01L33/502H01L2224/48137C09K11/77348H01L2924/00014Y02P60/14
Inventor 大沼宏彰增田昌嗣幡俊雄
Owner SHARP KK
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