CN103762209A

CN103762209A - Color temperature and color rendering-adjustable light emitting diode

Info

Publication number: CN103762209A
Application number: CN201110318163.0A
Authority: CN
Inventors: 李莹
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-19
Filing date: 2011-10-19
Publication date: 2014-04-30

Abstract

A color temperature and color rendering-adjustable light emitting diode. The color temperature and color rendering-adjustable light emitting diode comprises a base, as well as an electroluminescent blue light LED unit and an encapsulation body scattered with yellow fluorescent powder which are arranged on the base. The color temperature and color rendering-adjustable light emitting diode is characterized in that the color temperature and color rendering-adjustable light emitting diode is provided with a first LED unit which at least comprises an electroluminescent red light LED chip; the blue LED unit and the first LED unit are respectively connected with respective driving power sources through electrodes; and the blue light LED unit and the first LED unit are jointly encapsulated in the encapsulation body. After being stimulated by the blue light LED unit, the yellow fluorescent powder emits yellow light, and blue light and the yellow light are mixed to form white light, and the first LED unit at least provides red visible light, and therefore, the color rendering property of the light emitting diode can be increased to above 88. The blue light LED unit and the first LED unit are respectively driven. When different current of the first LED unit is adjusted, the color temperature of the light emitting diode can change, in low color temperature, the brightness of the light emitting diode can be higher. If illumination is required to be decreased, only the blue LED unit requires adjustment.

Description

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

Technical field

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

Background technology

Light-emitting diode (LED), is a kind of semiconductor subassembly, multiplex as indicator light, display panel etc. at the beginning; Along with the appearance of white light LEDs, be also used as illumination; Because it has advantages of that efficiency is high, the life-span is long, can recycling, anti-seismic performance well not the conventional light source such as cracky cannot compare with it, and be widely used by multi-field.With reference to Fig. 1, Fig. 2.The electricity that existing LED comprises pedestal 1, be located on pedestal causes blue light-emitting LED unit 2 and is scattered with the packaging body 4 of yellow fluorescent powder, the blue-ray LED wafer 21 of blue-ray LED unit is packaged in packaging body 4, the cathode and anode of blue-ray LED wafer 21 is electrically connected

electrode

51,52, and external power source provides drive current by electrode for 2 yuan of blue-ray LED lists.What this LED adopted is blue-ray LED wafer force mouth yellow fluorescent powder, when yellow fluorescent powder is subject to after blue-light excited to send sodium yellow, result, blue light and yellow light mix are sent white light, but its color rendering is poor is only 60-80, and especially when low colour temperature, its color rendering and brightness thereof are poorer.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, the light-emitting diode of a kind of adjustable color temperature and colour developing is provided, improve the poor deficiency of common light-emitting diode color rendering, improve the color rendering of LED, particularly color rendering and brightness during low colour temperature.

Object of the present invention is achieved through the following technical solutions: the light-emitting diode of a kind of adjustable color temperature and colour developing, comprises pedestal, is located at electricity on pedestal and causes and turn blue

The LED unit of light and be scattered with the packaging body of yellow fluorescent powder; It is characterized in that: on described pedestal, be also equiped with the 2nd LED unit, the 2nd LED unit at least comprises that an electricity causes the LED wafer glowing;

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 are together packaged in described packaging body.

In described the 2nd LED unit, also comprise that multiple electricity cause the LED wafer that sends respectively other different wave length visible rays, after all wafers serial connection, be electrically connected counter electrode.

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

The present invention has the following advantages:

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

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the present invention 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 structural representation of the present invention.

Fig. 4 is structure cutaway view of the present invention.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 electricity and causes LED unit 2 and the 2nd LED unit 3 of blue light-emitting on pedestal 1, and blue-ray LED unit 2 and the 2nd LED unit 3 are together packaged in 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 being covered on blue-ray LED unit 2 and a 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 is electrically connected

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 conventional construction, at this, is not described in detail.

With reference to Fig. 3, Fig. 4.The 2nd LED unit 3 is installed on pedestal 1 with above-mentioned 2 intervals, blue-ray LED unit, it includes multiple electricity and causes the LED wafer 31 that glows, after all red-light LED wafers 31 serial connection of the one LED unit, cathode and anode is electrically connected

counter electrode

61,62, and another separate external power source provides drive current by electrode for blue-ray LED unit.The 2nd all red-light LED wafers 31 in LED unit

Power be roughly 1/3 of 2 blue-ray LED unit, blue-ray LED unit.But be not limited to this, the 2nd LED is mono-also can comprise that one or more LED wafers in other visible rays such as yellow, blueness, green, all the 2nd lED unit wafers are mutually connected in series rear cathode and anode and are electrically connected counter electrode 61,62.Blue-ray LED unit 2, a LED unit 3 be respectively by power supply drive separately, and while adjusting the 2nd LED unit 3 electric current, it can make colour temperature change equally, and when low colour temperature, its brightness can show get Geng Gao; If reduce illumination, need only adjust blue-ray LED unit 2.

Claims

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

2. light-emitting diode according to claim 1, is characterized in that: in a described LED unit, also comprise that multiple electricity cause the LED wafer that sends respectively other different wave length visible rays, after all wafers serial connection, be electrically connected 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.