CN214580527U

CN214580527U - Dimmable COB light source

Info

Publication number: CN214580527U
Application number: CN202023224526.8U
Authority: CN
Inventors: 林晓敏; 陈智波; 包琼; 谢观逢; 苏佳槟
Original assignee: Guangzhou Ledteen Optoelectronics Co ltd
Current assignee: Silicon Energy Photoelectric Semiconductor Guangzhou Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-11-02
Anticipated expiration: 2030-12-28

Abstract

The utility model provides a COB light source of can adjusting luminance, which comprises a substrate, a plurality of blue light LED chips, a plurality of LED chips, resistance of adjusting luminance, resistance set up on the base plate, blue light LED chip with adjust luminance the LED chip and fix on the base plate, connect through the bonding wire between the blue light LED chip and form blue light LED chip branch road, adjust luminance and connect through the bonding wire between the LED chip and form the LED chip branch road of adjusting luminance, blue light LED chip branch road, adjust luminance the LED chip branch road all with the positive pole and the negative pole of base plate be connected, adjust luminance the LED chip branch road and fix on the blue light LED chip branch road with resistive connection. The utility model discloses compare with conventional COB light source, because the addition of the branch road of adjusting luminance of taking resistance, when lamps and lanterns equipment, can obtain higher flexibility ratio, through artifical adjustment lamps and lanterns electric current for the COB light source of having accomplished the encapsulation obtains the function of can adjusting luminance, can carry out photochromic fine setting according to customer's actual hobby on the former photochromic basis, obtains reddish partially, yellowish or greenish photochromic partially.

Description

Dimmable COB light source

Technical Field

The utility model relates to a LED illumination and encapsulation technical field especially relate to a COB light source can adjust luminance.

Background

The LED light source is widely applied to lighting of various scenes, and COB is taken as one of the packaging technologies, so that the cost of the whole lamp circuit system design, the optical design and the lamp manufacturing can be greatly reduced due to the design characteristic of high integration; in addition, because the LED lamp is a plane light source, the light-color consistency of a single product is incomparable with other lamps formed by reflow soldering of small-size patch lamp beads, and the LED lamp is widely applied to the design of various directional lighting lamps.

However, due to the difference in the batch properties of the raw materials for production and the differences in the production processes of products in different batches, particularly the difference in the dispensing amount and the ratio of the fluorescent glue and the difference in the sedimentation rates of the red fluorescent powder and the yellow-green fluorescent powder, a certain difference in light color exists between the light sources, and even if the products with color coordinates within a very small one-step color tolerance range are sorted and partitioned by the test equipment, the certain difference in light color can be perceived and judged by human eyes. Since the light color of the light source cannot be adjusted by other means after the light source completes the dispensing and forming of the fluorescent glue, the production cost will be greatly increased if the light color consistency of the light source needs to be continuously improved for light source manufacturers.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a light-adjustable COB light source for improve the difference of the light color of the common COB light source in batches and between batches. After the COB light source is produced, when a lamp manufacturer assembles the lamp, the current of the product can be finely adjusted, so that the product really realizes the consistency of the light color judgment between batches and the light color judgment in the batches by naked eyes.

The utility model provides a light-adjustable COB light source, including base plate, a plurality of blue light LED chip, a plurality of LED chip, the resistance of adjusting luminance, the resistance set up in on the base plate, the blue light LED chip with the LED chip of adjusting luminance is fixed on the base plate, form blue light LED chip branch road through the bonding wire connection between the blue light LED chip, adjust luminance and connect through the bonding wire between the LED chip and form the LED chip branch road of adjusting luminance, blue light LED chip branch road adjust luminance the LED chip branch road all with the positive pole and the negative pole of base plate are connected, adjust luminance the LED chip branch road fix with resistance connection's blue light LED chip is on the road.

Further, the anode and the cathode are located at the periphery of the blue LED chip and the dimming LED chip, and in the middle of the substrate.

Further, the dimming LED chip branch is packaged in the middle of the blue LED chip branch connected with the resistor.

Further, the blue light LED chip branch connected with the resistor is located in the center of the COB light source.

Further, the resistor is printed or attached on the substrate.

Further, the dimming LED chip is a red light chip, a green light chip or a yellow light chip.

And further, the fluorescent powder also comprises one or more of orange-red powder, yellow-green fluorescent powder, red fluorescent powder, green fluorescent powder and yellow fluorescent powder, and is mixed with a silica gel resin material, stirred to form fluorescent glue and coated in the box dam ring.

Further, the blue light LED chip and the dimming LED chip are fixed on the substrate through die attach adhesives.

Further, the substrate is a mirror aluminum substrate or a ceramic substrate.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses compare with conventional COB light source, because the addition of the branch road of adjusting luminance of taking resistance, when lamps and lanterns equipment, can obtain higher flexibility ratio, through artifical adjustment lamps and lanterns electric current for the COB light source of having accomplished the encapsulation obtains the function of can adjusting luminance, can carry out photochromic fine setting according to customer's actual hobby on the former photochromic basis, obtains reddish partially, yellowish or greenish photochromic partially. In addition, due to the difference of the combination of the lamp and the optical accessories such as the lens and the reflecting cup, better light color consistency can be realized through the dimming function.

The COB light source with the dimming function is the same as a conventional COB product in production technology, one-time dispensing forming can be achieved, and the production technology is simple. In addition, one or more of orange-red powder, yellow-green fluorescent powder, red fluorescent powder, green fluorescent powder and yellow fluorescent powder are matched, so that the design can meet the requirements of high color rendering property and high light efficiency compared with other dimming products. In addition, the design of the red chip, the green chip, the blue chip and the yellow chip has higher consistency of the obtained dimming function and simpler and more convenient dimming compared with other dimming designs such as adding the CSP chip. In addition, because the branch with the dimming function is connected with other branches which normally emit light in parallel, the product only has one positive electrode and one negative electrode, the lamp can be assembled by adopting the lamp consistent with the conventional COB product and the same assembly method, and the production cost of the lamp is not changed.

The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings. The detailed description of the present invention is given by the following examples and the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic diagram of a dimmable COB light source of the present invention;

fig. 2 is a first schematic diagram of the substrate structure of the present invention;

fig. 3 is a schematic diagram of a dimmable COB light source of the present invention;

fig. 4 is a schematic diagram of a substrate structure according to the present invention.

In the figure: 1. a resistance; 2. a substrate; 3. a blue LED chip; 4. dimming the LED chip; 5. and bonding wires.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

The utility model provides a COB light source of can adjusting luminance, as shown in fig. 1-4, includes base plate 2, a plurality of blue light LED chip 3, a plurality of LED chip 4, the resistance 1 of adjusting luminance, and resistance 1 sets up on base plate 2, and in this embodiment, the COB base plate 2 of taking resistance 1 is formed to printing or paste dress resistance 1 on base plate 2. The blue LED chip 3 and the dimming LED chip 4 are fixed on the substrate 2, for example, by die attach adhesive. The blue light LED chips 3 are connected through bonding wires 5 to form branches of the blue light LED chips 3, and as shown in FIG. 1, if the number of the dimming LED chips 4 is 1, the dimming LED chips 4 are directly connected with the anode and the cathode of the substrate 2. As shown in fig. 3, if the number of the dimming LED chips 4 is greater than 1, the dimming LED chips 4 are connected by the bonding wire 5 to form dimming LED chip 4 branches, and the blue LED chip 3 branch and the dimming LED chip 4 branch are both connected to the positive electrode and the negative electrode of the substrate 2, so that the circuits thereof are turned on. The branch of the dimming LED chip 4 is fixed on the branch of the blue LED chip 3 connected with the resistor 1. Preferably, the dimming LED chip 4 is a red chip, a green chip or a yellow chip.

As shown in fig. 2 and 4, the positive electrode and the negative electrode are located at the periphery of the blue LED chip 3 and the dimming LED chip 4, and at the middle of the substrate 2. The branch circuit of the dimming LED chip 4 is packaged in the middle of the branch circuit of the blue LED chip 3 connected with the resistor 1. And a blue light LED chip 3 branch connected with the resistor 1 is positioned in the center of the COB light source. And after dispensing is carried out on the box dam, one or more of orange red powder, yellow-green fluorescent powder, red fluorescent powder, green fluorescent powder and yellow fluorescent powder is matched, and after being mixed with a silica gel resin material, the mixture is stirred to form fluorescent glue and is coated in the box dam.

Due to the existence of the resistor 1, the branch with the resistor 1 can be started later than the branch without the resistor 1, the branch with the resistor 1 can be started by adjusting the total current to start the starting current and voltage of the branch with the resistor 1, and the branch with the resistor 1 can be started, so that a red light chip, a green light chip and a yellow light chip are lightened, the components of red light, green light, blue light or yellow light can be added on the basis of the original light color, and the purpose of regulating and controlling the light color is achieved.

Because the light emitting colors of the red light chip, the green light chip, the blue light chip and the yellow light chip are obviously different from the white light, the special light color chips are required to be placed at the central part of the light source and are positioned in the middle area with stronger central light intensity, thereby avoiding the possible obvious uneven light color and reducing the difficulty of light distribution. Therefore, the positive electrode and the negative electrode of the substrate 2 are not only positioned at the periphery of the chip, but also printed circuits are arranged in the middle of the substrate 2, so that the red light chip, the green light chip, the blue light chip and the yellow light chip with the dimming function can be connected with the positive electrode and the negative electrode of the substrate 2 in any number, and on products with different powers, the red light chip, the green light chip, the blue light chip and the yellow light chip in matched numbers can be selected according to the power, so that the light color of the products can be finely adjusted. The key point for realizing the product dimming function is that the red light chip, the green light chip, the blue light chip and the yellow light chip are positioned on the branch circuit with the resistor 1, and the circuit voltage formed by the resistor 1 and the chip is just slightly larger than the voltage of other branch circuits, so that the branch circuit with the dimming function can be started after other branch circuits are lighted, and required trace red light, green light or yellow light components are provided, so that better consistency is achieved during product assembly.

The substrate 2 is a mirror aluminum substrate 2 or a ceramic substrate 2. The resistor 1 on the substrate 2 for realizing the effect of adjusting the light color can be a printed resistor 1 on the ceramic substrate 2, or a chip resistor 1 can be used, and the mirror aluminum substrate 2 and the ceramic substrate 2 can also be mounted, and the circuit design of the substrate 2 is changed along with the change of the product power and the change of the color temperature.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a can adjust luminance COB light source which characterized in that: the LED dimming device comprises a substrate, a plurality of blue LED chips, a plurality of dimming LED chips and a resistor, wherein the resistor is arranged on the substrate, the blue LED chips and the dimming LED chips are fixed on the substrate, blue LED chip branches are formed by connecting the blue LED chips through bonding wires, dimming LED chip branches are formed by connecting the dimming LED chips through the bonding wires, the blue LED chip branches are all connected with the anode and the cathode of the substrate, and the dimming LED chip branches are fixed on the blue LED chip branches connected with the resistor.

2. The dimmable COB light source of claim 1, wherein: the anode and the cathode are positioned at the periphery of the blue LED chip and the dimming LED chip and in the middle of the substrate.

3. The dimmable COB light source of claim 2, wherein: and the dimming LED chip branch is packaged in the middle of the blue LED chip branch connected with the resistor.

4. The dimmable COB light source of claim 3, wherein: and the blue light LED chip branch connected with the resistor is positioned in the center of the COB light source.

5. The dimmable COB light source of claim 1, wherein: the resistor is printed or attached on the substrate.

6. The dimmable COB light source of claim 1, wherein: the dimming LED chip is a red light chip, a green light chip or a yellow light chip.

7. The dimmable COB light source of claim 1, wherein: the fluorescent powder is prepared by mixing silica gel resin materials, stirring to form fluorescent glue and coating the fluorescent glue in the box dam.

8. The dimmable COB light source of claim 1, wherein: the blue light LED chip and the dimming LED chip are fixed on the substrate through die bond glue.

9. The dimmable COB light source of claim 1, wherein: the substrate is a mirror aluminum substrate or a ceramic substrate.