CN201004467Y - A white light emitting device - Google Patents

Abstract

The utility model provides a white light luminous device which consists of a luminous chip and elements that the ray passing through, wherein on the elements that the ray passing through fluorescent powder is painted. By adopting painting the fluorescent powder on the elements that the ray passing through, part of ray of fluorescent powder on the formed elements will change the wave length after irradiated by the luminous chip and then being mixed the ray thus get a white light effect that can be felt by eyes. The utility model adopts led(LED chip) as a light source to trigger the fluorescent powder so as to generate an effect of white light, and can reduce the producing cost largely and also can improve the competitive strength of the product.

Description

A white light emitting device

technical field

The utility model provides a light-emitting device for changing the wavelength of a light source, in particular to a white-light light-emitting device.

Background technique

The so-called white light is a mixture of various colors of light. In the form of white light that can be seen by human eyes, at least two kinds of light are mixed, two-wavelength light (blue light + yellow light) or three-wavelength light (blue light + green light + red light) light), the currently commercialized products include two-wavelength blue light single-chip plus yellow (YAG) phosphors, and three-wavelength light that is more promising in the future, especially ultraviolet light chips plus red, blue and green phosphors.

White LEDs are used for lighting or as light sources for LCD panel light source blocks. The prospect has attracted global attention. Advanced countries such as Europe, the United States, and Japan have invested a lot of manpower and established special institutions to promote the research and development of white LEDs. The current LED technology is to use yellow phosphors such as YAG and TAG to directly coat blue light chips to produce white light, or to apply three-color phosphors to ultraviolet LED chips to produce white light.

Utility model content

The purpose of the utility model is to provide a combined white light emitting device for generating white light.

In order to achieve the above object, the solution of the present invention is: a white light emitting device, which is composed of a light-emitting chip and the accessories through which the light passes, wherein a phosphor layer is coated on the accessories through which the light of the light-emitting chip passes.

The light-emitting chip is a blue light chip, and the phosphor layer on the accessory through which the light passes is yellow (YAG) phosphor.

The light-emitting chip is an ultraviolet light chip, and the fluorescent powder layer on the accessory through which the light passes is red, blue and green three-color fluorescent powder.

The accessory through which light from the light-emitting chip passes is a shell coated with a phosphor layer.

The shell is a transparent body.

The shape of the shell is mirror semi-arc, flat plate, tube, cylinder, column or other shapes.

The light-emitting chip can be placed on the bottom, middle, inner layer or outer side of the accessory coated with the phosphor layer, and its number can be single or multiple in series and arranged in various geometric shapes.

The accessory coated with the phosphor layer is a lens, which is pasted on the light-emitting chip used for packaging by using an adhesive.

The lens can be pasted on the light-emitting chip by using resin, adhesive and bonding agent.

The bonded light-emitting chips can be single or multiple in a matrix arrangement.

After adopting the above scheme, the utility model is to coat the fluorescent powder layer on the accessories through which the light-emitting chip light passes, then the fluorescent powder layer on the formed accessories will change the wavelength of the light source after being irradiated by the light-emitting chip and then mix the light. Effect, in order to obtain the effect of white light that human eyes can perceive. The utility model uses light-emitting diodes (LED chips) as a light source to excite fluorescent powder to achieve the effect of generating white light, greatly reducing production costs and improving product competitiveness.

The utility model is further described below in conjunction with accompanying drawing and embodiment:

Description of drawings

Fig. 1 is the schematic diagram of the utility model first embodiment;

Fig. 2, Fig. 3, Fig. 4 and Fig. 5 are schematic diagrams of the application of the first embodiment of the utility model to different light-emitting devices;

Fig. 6, Fig. 7 are the schematic diagrams of the second embodiment of the utility model;

8 and 9 are schematic diagrams of the second embodiment of the present invention applied to different chip combinations.

Detailed ways

The first embodiment of the white light emitting device described in the present invention is shown in FIG. 1. The light emitting device 1 includes a light emitting chip and an accessory 4 coated with a fluorescent layer 3. The light emitting chip is a light emitting diode 2, and the accessory 4 covers Covered on the light-emitting diode 2, when the blue light diode 2 irradiates the yellow phosphor layer 3 to generate yellow light complementary to the blue light when emitting light, and then use the light mixing principle to mix the complementary yellow light and blue light to obtain The light-emitting device 1 that produces white light that can be perceived by human eyes, such as an ultraviolet light diode 2, irradiates the red, blue, and green three-color phosphor layer 3 to generate red, blue, and green three-color light that is complementary to ultraviolet light, and then uses the light mixing principle By mixing complementary red, blue, green and ultraviolet light, a light-emitting device 1 that produces white light that can be perceived by human eyes can be obtained.

This embodiment can be applied to different forms of light emitting devices. As shown in FIG. The light emitting diodes 2 can be placed on both sides of the accessories 4; or as shown in FIG. 4 , the light emitting diode series 5 can also be formed in the elongated light emitting device 1 . The accessory 4 here is a housing covered on the light emitting diode 2 or the LED series 5, the phosphor layer 3 on the housing is coated on it by coating or spraying, the accessory 4 can be glass, plastic or other translucent or transparent light-transmitting materials.

As shown in Figure 5, the utility model can also coat a phosphor layer 3 on a flat glass 6, when the colored light emitted by the light-emitting diode 2 excites the phosphor layer 3 on the flat glass 6 to mix into white light and then pass through the flat plate When the glass 6 is emitted, an excellent white light effect can also be achieved.

The second embodiment of the present utility model is shown in Fig. 6, Fig. 7, and it comprises lead frame 8, epoxy resin 9, light-emitting diode 10, the lens 7 that is coated with phosphor layer 3, and light-emitting diode chip 10 is placed on wire on the frame 8, and epoxy resin 9 is added to complete the chip package, and then the lens 7 coated with the phosphor layer 3 is attached to the epoxy resin 9 with an adhesive or resin or a bonding agent 11, or through The colored light chip is used as an excitation light source to produce a mixed light effect to obtain white light that human eyes can perceive. Its light-emitting diode 10 can be combined with the lens 7 coated with the phosphor layer 3 individually, as shown in Figure 8, and can also be combined with the injection molded lens 7 coated with the phosphor layer 3 in a matrix arrangement, as shown in Figure 9 Show.

To sum up, the utility model is to apply the fluorescent powder layer 3 on the accessories through which light from the light-emitting chip passes, then the fluorescent powder layer 3 on the molded accessories will change the wavelength of the light source after being irradiated by the light-emitting chip, and then undergo the light mixing effect. , to obtain the effect of white light that the human eye can perceive. The utility model uses light-emitting diodes (LED chips) as a light source to excite fluorescent powder to achieve the effect of generating white light, greatly reducing production costs and improving product competitiveness.

Claims (10)

1. A white light emitting device, which is composed of a light-emitting chip and its accessories through which the light passes, and is characterized in that: a phosphor layer is coated on the accessories through which the light passes of the light-emitting chip. 2. The white light emitting device according to claim 1, wherein the light emitting chip is a blue light chip, and the phosphor layer coated on the accessories through which the light passes is yellow (YAG) phosphor. 3. The white light emitting device according to claim 1, wherein the light emitting chip is an ultraviolet light chip, and the phosphor layer coated on the accessories through which the light passes is red, blue and green phosphor. 4. The white light emitting device according to claim 1, characterized in that: the light emitting chip can be placed on the bottom, middle, inner layer or outside of the accessories coated with the phosphor layer, and the number can be single or multiple in series arrangement. 5. The white light emitting device according to claim 1, characterized in that: the accessory through which light from the light emitting chip passes is a shell coated with a phosphor layer. 6. The white light emitting device according to claim 1, wherein the housing is a light-transmitting body. 7. The white light emitting device according to claim 1, characterized in that: the shape of the housing is mirror semi-arc, flat plate, tubular, cylindrical or columnar. 8. The white light emitting device according to claim 1, wherein the accessory coated with the phosphor layer is a lens, which is bonded to the epoxy resin used for packaging with an adhesive. 9. The white light emitting device according to claim 1, characterized in that the lens can be bonded to the light emitting chip by using resin, adhesive or bonding agent. 10. The white light emitting device according to claim 1, characterized in that: the bonded light emitting chips can be a single one or a plurality of them arranged in a matrix.

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