CN203118943U

CN203118943U - COB lamp source board structure

Info

Publication number: CN203118943U
Application number: CN 201220720844
Authority: CN
Inventors: 张孟祥; 陈纪文; 辜菁
Original assignee: NAN CHANG VIRIDIS OPTO TECHNOLOGY Co Ltd
Current assignee: NAN CHANG VIRIDIS OPTO TECHNOLOGY Co Ltd
Priority date: 2012-12-25
Filing date: 2012-12-25
Publication date: 2013-08-07
Anticipated expiration: 2022-12-25

Abstract

The utility model provides a COB lamp source board structure and relates to the COB lamp source board structure coated with a fluorescent powder layer on a surface away from LED chips in an emergent direction of the LED chips. The COB lamp source board structure is composed of a substrate, the two LED chips with different wavelengths bonded on the substrate, transparent glue for protecting the LED chips and a lamp cover. The LED chips with different wavelengths are a blue-light LED chip and a red-light LED chip. The transparent glue is coated on the upper parts of the LED chips. The inner surface of the lamp cover is coated with yellow fluorescent powder. By using the COB lamp source board structure provided by the utility model, problems that white light with a single color temperature is obtained by using the blue-light LED for exciting the yellow fluorescent powder and the heat dissipation performance is degraded since the fluorescent powder adheres to the LED chips with high temperatures are solved. The COB lamp source board structure provided by the utility model has advantages of good light-mixing effect, long service lifetime, good stability and the like.

Description

A kind of COB lamp source plate structure

Technical field

The utility model relates to a kind of COB lamp source plate structure, is specifically related to a kind of COB lamp source plate structure of leaving led chip surface-coated phosphor powder layer at the led chip light direction.

Background technology

Along with the semiconductor lighting development of technology, the LED illuminating product has begun to be widely applied to every field.The most traditional white light LEDs implementation is by producing white light LEDs at blue-light LED chip surface-coated yellow fluorescent powder at present.But there are two problems in the white light LEDs that is to use this mode to prepare: first problem is at blue-light LED chip surface-coated fluorescent material, because the hypotelorism of fluorescent material and chip, hindered the chip surface heat radiation, rising along with temperature, simultaneously because the existence of light scattering makes the luminous efficiency of led chip reduce.Second problem is to excite yellow fluorescent powder to obtain white light LEDs by blue-light LED chip, and light conversion efficiency is not high, and the stability of color is subjected to the influence of temperature and drive current bigger, and can only obtain the white light of single colour temperature, and colour temperature is uncontrollable.

The utility model content

The purpose of this utility model is at defective recited above, provides a kind of and can realize that random colour temperature regulates, photoelectric efficiency height, the COB lamp source plate structure of the good and perfect heat-dissipating of colour developing ability.

The purpose of this utility model is achieved by the following technical programs.

A kind of COB lamp source plate structure; constituted by the led chip of substrate, solid brilliant two kinds of different wave lengths on substrate, transparent adhesive tape and the lampshade of protection led chip; the led chip of described two kinds of different wave lengths is blue-light LED chip and red LED chip; described transparent adhesive tape is coated in the led chip top, is coated with yellow fluorescent powder on the inner surface of described lampshade.

Described substrate is metal or ceramic substrate, and it is shaped as circular or square.

The wavelength of described blue-light LED chip is 450-465nm.

The wavelength of described red LED chip is 615-640nm.

Described blue-light LED chip and described red LED chip top be the applied in two coats transparent adhesive tape all, and the internal layer transparent adhesive tape is first transparent adhesive tape, and outer transparent adhesive tape is second transparent adhesive tape, and first and second transparent adhesive tape is silica gel.

The relative index of refraction scope of described first transparent adhesive tape is 1.4-1.5.

The relative index of refraction scope of described second transparent adhesive tape is 1.3-1.4.

Described lampshade is hemispheric acrylic lampshade.

Described yellow fluorescent powder is one or more the mixture in YAG aluminate yellow fluorescent powder, silicate yellow fluorescent powder and the nitride yellow fluorescent powder.

Connected mode between the led chip of described two kinds of different wave lengths is for being connected in series or in parallel the company.

The beneficial effects of the utility model are: the utility model excites yellow fluorescent powder by blue-light LED chip and red LED chip, realized the white light LEDs that colour temperature is adjustable, its photoelectric efficiency height, the colour developing ability is good, fluorescent material is coated on the led chip light direction and leaves chip surface simultaneously, there is the gap between phosphor powder layer and the led chip, fluorescent material is drawn back and the led chip of high heat between distance, avoid making the heat dispersion variation because fluorescent material is pasting the led chip of high heat, make phosphor powder layer suffer high temperature quencher and aging, the problem that causes luminous efficiency to reduce, thus the reliability of led chip and phosphor powder layer and the bright dipping lumen of LED improved.The utility model has solved blue-light LED chip and has excited yellow fluorescent powder to obtain the problem that the white light of single colour temperature and led chip that fluorescent material is pasting high heat make the heat dispersion variation, has advantages such as the mixed light effect is good, life-span length, good stability.

Description of drawings

Fig. 1 is the stereogram of the COB encapsulating structure among the utility model embodiment.

Fig. 2 is the vertical view of the COB encapsulating structure among the utility model embodiment.

Fig. 3 is the A-A ' cutaway view of Fig. 2.

Fig. 4 is the schematic diagram that is connected in series of the COB lamp source plate structure among the utility model embodiment.

Fig. 5 is the circuit theory diagrams of Fig. 4 correspondence.

Fig. 6 is the schematic diagram that is connected in parallel of the COB lamp source plate structure among the utility model embodiment.

Fig. 7 is the circuit theory diagrams of Fig. 6 correspondence.

Among the figure, the N utmost point 10 of the N utmost point 8 of substrate 1, blue-light LED chip 2, red LED chip 3, first transparent adhesive tape 4, second transparent adhesive tape 5, yellow fluorescent powder 6, lampshade 7, blue-light LED chip, the P utmost point 9 of blue-light LED chip, red LED chip, the P utmost point 11 positive sources 12 of red LED chip, power cathode 13.

Embodiment

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

As shown in Figure 1 to Figure 3, COB lamp source plate structure comprises substrate 1, blue-light LED chip 2, red LED chip 3, first transparent adhesive tape 4, second transparent adhesive tape 5, yellow fluorescent powder 6, lampshade 7, positive source 12 and power cathode 13.Described substrate 1 is the aluminium base of circular or square good heat dissipation effect, and described blue-light LED chip 2 and red LED chip 3 are solid brilliant on substrate 1, and in the center of substrate 1.The wavelength of described blue-light LED chip is 450-465nm.The wavelength of described red LED chip is 615-640nm.Described blue-light LED chip 2 is coated with two-layer transparent adhesive tape with described red LED chip 3 tops, and the internal layer transparent adhesive tape is first transparent adhesive tape 4, and outer transparent adhesive tape is second transparent adhesive tape 5, and first and second transparent adhesive tape is silica gel.

The relative index of refraction scope of described first transparent adhesive tape is 1.4-1.5.The relative index of refraction scope of described second transparent adhesive tape is 1.3-1.4.Described lampshade 7 is hemispheric acrylic lampshade, and is coated with yellow fluorescent powder 6 on the inner surface.

Fig. 4 and Fig. 6 are the connected modes between the led chip of two kinds of different wave lengths in the COB lamp source plate structure, and described connected mode can be in parallel or series connection.It comprises: the N utmost point 10 of the N utmost point 8 of blue-light LED chip 2, the P utmost point 9 of blue-light LED chip 2, red LED chip 3, the P utmost point 11 of red LED chip 3, positive source 12, power cathode 13.Positive source 12 and power cathode 13 are distributed in the both sides of substrate 1, all are connected by gold thread between led chip and the led chip and between led chip and the power electrode.Fig. 5 is the circuit theory diagrams corresponding with Fig. 4 and Fig. 6 with Fig. 7.

Fig. 4 is being connected in series between the led chip of two kinds of different wave lengths in the COB encapsulating structure, blue-light LED chip 2 and red LED chip 3 are connected in series, the N utmost point 8 of power cathode 13 and blue-light LED chip 2 is connected, the P utmost point 11 of positive source 12 and blue-light LED chip 3 is connected, the P utmost point 9 of blue-light LED chip 2 is connected with the N utmost point 10 of red LED chip 3, and positive source 12 is connected with the male or female of external power supply respectively with power cathode 13.

Fig. 6 is being connected in parallel between the led chip of two kinds of different wave lengths in the COB encapsulating structure, blue-light LED chip 2 and red LED chip 3 are connected in parallel, the N utmost point 8 of power cathode 13 and blue-light LED chip 2 is connected, the P utmost point 11 of positive source 12 and blue-light LED chip 3 is connected, the P utmost point 9 of blue-light LED chip 2 is connected with the P utmost point 11 of red LED chip 3, and the N utmost point 8 of blue-light LED chip 2 is connected with the N utmost point 10 of red LED chip 3.Positive source 12 is connected with the male or female of external power supply respectively with power cathode 13.

Claims

1. COB lamp source plate structure; constituted by the led chip of substrate (1), solid brilliant two kinds of different wave lengths on substrate (1), transparent adhesive tape and the lampshade (7) of protection led chip; it is characterized in that: the led chip of described two kinds of different wave lengths is blue-light LED chip (2) and red LED chip (3); described transparent adhesive tape is coated in the led chip top, is coated with yellow fluorescent powder (6) on the inner surface of described lampshade (7).

2. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: described substrate (1) is metal or ceramic substrate, it is shaped as circular or square.

3. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: the wavelength of described blue-light LED chip (2) is 450-465nm.

4. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: the wavelength of described red LED chip (3) is 615-640nm.

5. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: described blue-light LED chip (2) and the equal applied in two coats transparent adhesive tape in described red LED chip (3) top, the internal layer transparent adhesive tape is first transparent adhesive tape (4), outer transparent adhesive tape is second transparent adhesive tape (5), and first transparent adhesive tape (4) is silica gel with second transparent adhesive tape (5).

6. a kind of COB lamp source plate structure according to claim 5, it is characterized in that: the relative index of refraction scope of described first transparent adhesive tape (4) is 1.4-1.5.

7. a kind of COB lamp source plate structure according to claim 5, it is characterized in that: the relative index of refraction scope of described second transparent adhesive tape (5) is 1.3-1.4.

8. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: described lampshade (7) is hemispheric acrylic lampshade.

9. a kind of COB lamp source plate structure according to claim 1, it is characterized in that: the connected mode between the led chip of described two kinds of different wave lengths is for being connected in series or being connected in parallel.