CN201122595Y

CN201122595Y - LED capable of adjusting color temperature and developing color

Info

Publication number: CN201122595Y
Application number: CNU2007200089684U
Authority: CN
Inventors: 林明德; 曾有助; 林威谕
Original assignee: CONCORD OPTO ELECTRIC TECH (QUANZHOU) Co Ltd
Current assignee: CONCORD OPTO ELECTRIC TECH (QUANZHOU) Co Ltd
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2008-09-24
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to color temperature and color rendering adjustable light emitting diode, which comprises a base seat, an electroluminescent blue-light LED unit arranged on the base seat and an encapsulation body, on which scattered yellow luminescent powder is distributed. The utility model is characterized in that the light emitting diode is also provided with a second LED unit at least comprising electroluminescent red-light LED wafer; the blue light LED unit and the second LED unit are respectively connected with the respective driving power supply through electrodes; the blue light emitting LED unit and the second LED unit are encapsulated into the encapsulation body together. The yellow luminescent powder emits yellow light after being activated by the blue light LED unit, the blue light and the yellow light are mixed to form white light, and the second LED unit at least provides red visible light, therefore, the LED color rendering property can be increased to above 88. The blue light LED unit and the second LED unit are respectively driven, the second LED unit also can ensure the color temperature to be changed when adjusting different currents, and the brightness can be higher under low color temperature; if the illumination is required to be reduced, only the blue light LED unit needs to be adjusted.

Description

The light-emitting diode of adjustable color temperature and colour developing

Technical field

The utility model relates to light-emitting diode, the light-emitting diode of particularly a kind of adjustable color temperature and colour developing.

Background technology

Light-emitting diode (LED) is a kind of semiconductor subassembly, at the beginning indicator light, display panels etc. of being used as more; Along with the appearance of white light LEDs, also be used as illumination; Since its have efficient height, life-span long, can recycling, well conventional light source such as the cracky advantage that can't compare with it not of anti-seismic performance, and be extensive use of by multi-field.With reference to Fig. 1, Fig. 2.Existing LED comprises pedestal 1, is located at the packaging body 4 that the electricity on the pedestal causes blue light-emitting LED unit 2 and is scattered with yellow fluorescent powder, the blue-ray LED wafer 21 of blue-ray LED unit is packaged in the packaging body 4, the cathode and anode of blue-ray LED wafer 21 electrically connects

electrode

51,52, and external power source provides drive current by electrode for 2 yuan for the blue-ray LED list.What this LED adopted is that the blue-ray LED wafer adds yellow fluorescent powder, when yellow fluorescent powder is subjected to send sodium yellow after blue-light excited, the result, blue light and yellow light mix are sent white light, but its color rendering is relatively poor only is 60-80, and especially its color rendering and brightness thereof are poorer when hanging down colour temperature.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, and the light-emitting diode of a kind of adjustable color temperature and colour developing is provided, and improves the relatively poor deficiency of common light-emitting diode color rendering, improves the color rendering of LED, color rendering and brightness when particularly hanging down colour temperature.

The purpose of this utility model is achieved through the following technical solutions:

The light-emitting diode of a kind of adjustable color temperature and colour developing, the electricity of comprise pedestal, being located on the pedestal causes the LED unit of blue light-emitting and the packaging body that is scattered with yellow fluorescent powder; It is characterized in that: also be equiped with the 2nd LED unit on the described pedestal, the 2nd LED unit comprises that at least an electricity causes the LED wafer that glows; Blue-ray LED unit, the 2nd LED unit connect driving power separately by electrode respectively; Blue light-emitting LED unit and the 2nd LED unit together are packaged in the described packaging body.

Comprise also in described the 2nd LED unit that a plurality of electricity cause the LED wafer that sends other different wave length visible lights respectively, all wafers serial connection back electrically connects counter electrode.

Described packaging body adopts epoxy resin or silica gel transparent material to make.

The utlity model has following advantage:

Be provided with the LED wafer that two-way is independently connected separately in the packaging body of light-emitting diode, wherein one the tunnel is the LED unit that known electricity causes blue light-emitting; Another road comprises that at least an electricity causes the 2nd LED unit of the LED wafer that glows.Send sodium yellow after yellow fluorescent powder is excited by the blue-ray LED unit, blue light and yellow light mix form white light, and the 2nd LED unit provides red visible light at least again, and the LED color rendering is increased to more than 88.Blue-ray LED unit, the 2nd LED unit drive respectively, and when different electric current was adjusted in the 2nd LED unit, it can make colour temperature change equally, and when low colour temperature, its brightness can show De Genggao; If will reduce illumination, need only adjust the blue-ray LED unit and get final product.

Description of drawings

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the structural representation of existing light-emitting diode (LED).

Fig. 2 is the cutaway view of existing light-emitting diode (LED).

Fig. 3 is a structural representation of the present utility model.

Fig. 4 is a structure cutaway view of the present utility model.

Embodiment

With reference to Fig. 3, Fig. 4.The light-emitting diode of adjustable color temperature and colour developing comprises pedestal 1, is equiped with LED unit 2 and the 2nd LED unit 3 that electricity causes blue light-emitting on pedestal 1, and blue-ray LED unit 2 and the 2nd LED unit 3 together are packaged in the packaging body 4.Packaging body 4 adopts epoxy resin, silica gel or other transparent materials to make; Packaging body 4 is scattered with the yellow fluorescent powder that is covered on blue-ray LED unit 2 and the 2nd LED unit 3.

With reference to Fig. 3, Fig. 4.Blue-ray LED unit 2 comprises blue-ray LED wafer 21, and the cathode and anode of blue-ray LED wafer 21 electrically connects

electrode

51,52, and external power source provides drive current by

electrode

51,52 for blue-ray LED unit 2.Blue-ray LED unit 2 is a conventional construction, does not do detailed description at this.

With reference to Fig. 3, Fig. 4.LED unit 3 is installed on the pedestal 1 at interval with above-mentioned blue-ray LED unit 2, it includes a plurality of electricity and causes the LED wafer 31 that glows, all red-light LED wafer 31 serial connection back cathode and anode of the 2nd LED unit electrically connect

counter electrode

61,62, and another separate external power source provides drive current by electrode for the blue-ray LED unit.The power of the 2nd all red-light LED wafers 31 of LED unit is roughly 1/3 of 2 blue-ray LED unit, blue-ray LED unit.But be not limited to this, single one or more LED wafers that also can comprise in other visible lights such as yellow, blueness, green of the 2nd LED, all the 2nd LED unit wafers are connected in series the back cathode and anode mutually and electrically connect counter electrode 61,62.By power supply drive separately, when adjusting the 2nd LED unit 3 electric currents, it can make colour temperature change equally respectively for blue-ray LED unit 2, the 2nd LED unit 3, and when low colour temperature, its brightness can show De Genggao; If will reduce illumination, need only adjust blue-ray LED unit 2 and get final product.

Claims

1, the light-emitting diode of a kind of adjustable color temperature and colour developing, the electricity of comprise pedestal, being located on the pedestal causes the LED unit of blue light-emitting and the packaging body that is scattered with yellow fluorescent powder; It is characterized in that: also be equiped with the 2nd LED unit on the described pedestal, the 2nd LED unit comprises that at least an electricity causes the LED wafer that glows; Blue-ray LED unit, the 2nd LED unit connect driving power separately by electrode respectively; Blue light-emitting LED unit and the 2nd LED unit together are packaged in the described packaging body.

2, light-emitting diode according to claim 1 is characterized in that: comprise also in described the 2nd LED unit that a plurality of electricity cause the LED wafer that sends other different wave length visible lights respectively, all wafers serial connection back electrically connects counter electrode.

3, light-emitting diode according to claim 1 is characterized in that: described packaging body adopts epoxy resin or silica gel transparent material to make.