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light emitting device

A light-emitting device and light-emitting element technology, which is applied in lighting devices, signal devices, light sources, etc., can solve problems such as poor light distribution, poor curing efficiency, nozzle clogging, etc., and achieve the effect of increasing peak illuminance and improving light distribution

Active Publication Date: 2020-02-21
NICHIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the conventional light-emitting device, since the distance between the object to be irradiated and the light source unit needs to be separated in the printing installation environment, it takes time to cure the ink irradiated with ultraviolet rays.
In addition, part of the light emitted from the light-emitting element is not reflected by the reflective surface as parallel light, but emitted to the outside of the light-emitting device, which deteriorates the light distribution of the light-emitting device.
[0008] In addition, in the existing light-emitting device, the light that does not reach the reflective surface is diverged from the opening at the front end on the light-irradiating side of the device.
Therefore, the existing light-emitting device not only has poor light distribution, but also has a small amount of light reaching the irradiation surface, so the required amount of light cannot be obtained, for example, the curing efficiency is deteriorated.
In addition, since the light emitted from the opening at the front end is irradiated to a portion that does not need to be irradiated with light, for example, clogging of nozzles that supply ink cured by ultraviolet irradiation may occur.

Method used

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no. 1 approach

[0046] Hereinafter, an ultraviolet irradiation device for curing ink and the like will be described as an example of the light emitting device according to the first embodiment of the present invention. Such as Figure 1 to Figure 3 As shown, the light emitting device 10 of this embodiment mainly includes a light source unit 20 , a reflection unit 40 , and an installation stand 60 . Such as image 3 As shown, the light-emitting device 10 connects the reflector 40 and the installation platform 60 on the side opposite to the light irradiation direction side, and has an opening 11 formed by separating the reflection unit 40 from the installation platform 60 on the light irradiation direction side. The light emitting device 10 emits light (ultraviolet light) in the horizontal direction toward an irradiation surface that is an object separated by a predetermined distance (for example, 10 mm or more).

[0047] Hereinafter, the extending direction of the linear light source unit 20...

no. 2 approach

[0083] Figure 4 The light emitting device 10A shown with figure 2 The light emitting device 10 shown is different in that a plurality of light emitting elements 30 are arranged in two rows on the light source portion 20A. Therefore, for figure 2The same structures of the light emitting device 10 shown are denoted by the same reference numerals, and description thereof will be omitted.

[0084] The light source unit 20A includes a first light source unit 21 and a second light source unit 22 .

[0085] The first light source unit 21 is a light source unit in which a plurality of light emitting elements 30 are linearly arranged in the X direction.

[0086] The second light source unit 22 is a light source unit in which a plurality of light emitting elements 30 are linearly arranged parallel to the first light source unit 21 . The second light source unit 22 is disposed close to the first light source unit 21 .

[0087] More specifically, the first light source unit 21 and...

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Abstract

The present invention provides a light-emitting device with improved light distribution and high peak illuminance. The light emitting device (10) includes: an installation stand (60) having a first planar portion (61) and a second planar portion (62) obliquely adjacent to the first planar portion; a linear light source portion (20 ), which is provided on the second planar part, and has a light emitting element (30); and a reflection part (40), which is extended in the extension direction of the linear light source part, and has a reflection surface (50), The reflective surface (50) has a first reflective surface (51) and a second reflective surface (52) arranged on a side closer to the installation table (60) than the first reflective surface, the first reflective surface The surface (51) reflects the light from the light source part (20) toward the direction parallel to the first planar part (61), that is, the irradiation direction, and the second reflection surface (52) reflects the light from the light source part ( The light in 20) is reflected toward the first reflective surface (51).

Description

technical field [0001] The present invention relates to light emitting devices. Background technique [0002] Generally, a light emitting device using a light emitting element such as a light emitting diode (LED: Light Emitting Diode) in a light source unit has been proposed as a light source for use in various fields such as automobiles (for example, refer to Patent Documents 1 and 2). This light emitting device includes a light source unit and a reflector provided so as to focus on the light source unit, and the light source unit is detachably configured so as to be positionally adjustable with respect to the reflector (for example, refer to Patent Document 1). In addition, an ultraviolet light emitting device including a light source unit and a reflection mirror is also used in an offset printing machine that cures ink by irradiating ultraviolet rays from a light source unit. [0003] The above-mentioned conventional ultraviolet light emitting device uses a cylindrical r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/20F21V7/22F21V17/10F21Y115/10
CPCF21V7/22F21V17/10F21V7/06F21V17/12F21Y2101/00F21Y2103/10F21Y2115/10F21S41/147F21S41/151F21S41/32H01L33/60F21V7/0008
Inventor 小野正人大汤孝宽
Owner NICHIA CORP
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