CN206532777U - A colored LED lamp bead - Google Patents

Abstract

The utility model provides a glory LED lamp pearl. This colored light LED lamp pearl includes four primary colors wafer and base plate, wherein, four primary colors wafers are red wafer, green wafer, first blue wafer and warm white wafer respectively, warm white wafer is formed by the laminating of fluorescence diaphragm and the blue wafer of second, the fluorescence diaphragm pastes the top layer of the blue wafer of second, four primary colors wafers are the field font and set up on the base plate, just red wafer, warm white wafer, first blue wafer and green wafer are arranged according to anticlockwise order. The utility model provides a glory LED lamp pearl can send the colorful light of warm tone partially, and it still has the colour temperature scope and the display index wider than traditional glory LED lamp pearl simultaneously.

Description

A colored LED lamp bead

technical field

The utility model belongs to the field of semiconductors and relates to an LED lighting technology, in particular to a colored LED lamp bead.

Background technique

LED is a semiconductor that can convert electrical energy into light energy. LED light sources are widely used for their long life, high luminous efficiency, good shock resistance, no damage, no radiation and low power consumption, which cannot be compared with traditional light sources. in the field of lighting.

For general lighting, white LEDs may become the most potential green lighting source to replace incandescent lamps, tungsten lamps and fluorescent lamps due to their advantages of energy saving, environmental protection and long life. However, with the development of LED technology, the diversification of modern life and the increase of urban lighting projects, people no longer only require LED lighting, but also pay more attention to the quality of lighting, and the demand for colored light is also increasing. The important parameters that directly affect the quality of colored light are: the color rendering index and color temperature of the light source. The ideal light source is natural light, which has very good color rendering and a variety of different color temperatures. However, how to obtain an artificial light source with the same lighting quality as natural light has been the dream of human beings for nearly a hundred years. Up to now, human electric light sources have changed from incandescent lamps to energy-saving lamps, and now to LED lamps. Only incandescent lamps can approach natural light in terms of color rendering characteristics (all color rendering indexes R1-R15 of incandescent lamps are above 95). It is a pity that incandescent lamps only have a fixed color temperature and are inefficient in energy consumption, so they will soon be eliminated. In recent years, people have been studying how to obtain a new type of LED artificial light source like natural light: the color temperature can be adjusted in a wide range (2700-6500K), and the ultra-high color rendering index ( R1-R15 are all above 90).

At present, the existing color LED lamp beads in the market generally use a combination of red, blue, green and cool white light sources, but the color emitted by this light source is cooler, the color temperature range is small, and the cool-colored light is easy to make people's eyes tired , that is, it is not pleasing to the eyes as mentioned in the industry, so it is necessary to update the colored LED lamp beads.

Utility model content

In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a colored LED lamp bead. The colored LED lamp bead can emit colorful light with a warmer tone, and it also has a wider color temperature range and display index than traditional colored LED lamp beads.

In order to achieve the purpose of the aforementioned utility model, the utility model provides a colored light LED lamp bead, which includes four primary color chips and a substrate, wherein the four primary color chips are respectively a red chip, a green chip, and a first blue chip. Warm white wafers,

The warm white chip is formed by bonding a fluorescent film and a second blue chip, and the fluorescent film is attached to the surface of the second blue chip,

The four primary color chips are arranged on the substrate in a square shape, and the red chip, the warm white chip, the first blue chip and the green chip are arranged counterclockwise.

In the above colored LED bead, the red chip is arranged diagonally to the first blue chip, and the green chip is arranged diagonally to the warm white chip.

In the above colored LED lamp bead, preferably, the color temperature of the warm white chip is 2700K-3000K, and the display index is ≥80.

In the above colored LED lamp bead, the colored light LED lamp bead is toned by the warm white chip.

In the above-mentioned colored light LED lamp bead, preferably, the thickness of the fluorescent film is 90 μm-200 μm, the fluorescent film is composed of UV film and phosphor silica gel film, and the phosphor silica film is composed of phosphor powder It is formed by mixing with silica gel, and the mass ratio of the fluorescent powder to silica gel is 4:1.

In the above-mentioned colored light LED lamp bead, preferably, the phosphor is formed by mixing yellow phosphor, red phosphor and green phosphor, and the mass ratio of the phosphor is 100%, and the yellow phosphor, red phosphor and green phosphor are mixed. The mass ratio of red phosphor powder and green phosphor powder is (0-99):(0-99):(0-99).

In the above-mentioned colored light LED bead, preferably, one positive pin and four negative pins are arranged on the substrate, and the four negative pins include a red negative pin, a green negative pin, a first blue color negative pin and warm white negative pin,

The anode pins are respectively electrically connected to the anodes of the four primary color chips,

The red negative pin is electrically connected to the negative pole of the red chip, the green negative pin is electrically connected to the negative pole of the green chip, and the first blue negative pin is electrically connected to the negative pole of the first blue chip. The negative pole is electrically connected, and the warm white negative pin is electrically connected with the negative pole of the warm white chip.

The colored light LED lamp beads provided by the utility model can use the light source combined with red, blue, green and warm white to emit colorful light with a warmer tone, giving people a warm and comfortable feeling, and solving the problem caused by the combined light source LED of red, blue, green and cool white. At the same time, the colored light LED lamp bead has a wider color temperature range and display index than the traditional colored light LED lamp bead, and can display more colorful colors.

The colored light LED lamp bead of the utility model is prepared through the following steps:

Step 1: preparing a fluorescent membrane;

Step 2: fix the red chip, the second blue chip, the first blue chip and the green chip on the substrate in counterclockwise order to obtain the prefabricated substrate material;

Step 3: The prefabricated substrate material is subjected to a film-attachment treatment, so that the fluorescent film is closely attached to the surface of the second blue chip, and then baked at a temperature of 90°C-200°C for 10min-300min to obtain LED substrate material;

Step 4: The LED substrate material is sequentially subjected to wire bonding, compression molding, cutting, light splitting, taping, and packaging to obtain colored LED lamp beads.

In the above preparation method, the fluorescent film is closely attached to the surface of the second blue chip, and then baked at a temperature of 90°C-200°C for 10min-300min, so that the second blue chip becomes Become a warm white chip, then combine with red chip, first blue chip, green chip to form warm light source.

In the above preparation method, the specific steps of the film lamination process are as follows: put the prefabricated substrate material into a professional film lamination machine, and then use glue dispensing equipment to place a small amount of glue on the surface of the second blue wafer, Then let the film mounter suck up the fluorescent film and paste it on the surface of the second blue chip.

In the above preparation method, the preparation method of the fluorescent film comprises the following steps:

(1) Flatten the UV film with a thickness of 85μm-200μm, then introduce a photoresist of 10μm-100μm and level it, and then bake it at a temperature of 80°C-200°C for 30min-300min to obtain a UV and photoresist film ;

(2) Cover the mask plate on the UV and photoresist film, then expose it to 250nm-410nm ultraviolet light for 0.1-30s, and then develop it in the developer at a temperature of 90°C-150°C for 1min-300min and use Washing with deionized water to obtain a UV and photoresist film loaded with a circular photoresist column with a diameter of 90 μm-200 μm or a square photoresist column with a side length of 90 μm-200 μm;

(3) Mix the phosphor powder and the silicone liquid at a mass ratio of 4:1, and then introduce it onto the UV and photoresist film obtained in step (2), level off and solidify, and use a film scraping machine to press the film to obtain a 90μm film. - 200μm composite film;

(4) Baking the composite film at a temperature of 100°C-200°C for 10min-300min, and then placing it in a photoresist etching solution to remove the photoresist to form a circle or side with a diameter of 90μm-200μm Fluorescent film of square LED electrodes with a length of 90 μm-200 μm;

Wherein, the phosphor is formed by mixing yellow phosphor, red phosphor and green phosphor, based on the mass ratio of the phosphor as 100%, the mass ratio of the yellow phosphor, red phosphor and green phosphor is For (0-99):(0-99):(0-99).

In the above preparation method, the strength of the UV film before exposure to ultraviolet light is 10 N/mm ² -30 N/mm ² , and the strength after exposure to ultraviolet light is 0.01 N/mm ² -0.1 N/mm ² .

The beneficial effects of the utility model:

The colored light LED lamp beads provided by the utility model can use the light source combined with red, blue, green and warm white to emit colorful light with a warmer tone, giving people a warm and comfortable feeling, and solving the problem caused by the combined light source LED of red, blue, green and cool white. At the same time, the colored light LED lamp bead has a wider color temperature range and display index than the traditional colored light LED lamp bead, and can display more colorful colors. Moreover, the colored light LED lamp bead provided by the utility model has a simple preparation process and is suitable for large-scale production.

Description of drawings

Fig. 1 is the warm white chip structure schematic diagram of the colored light LED lamp bead that embodiment 1 provides;

FIG. 2 is a schematic diagram of the arrangement of four primary color chips of the colored LED lamp bead provided in Embodiment 1. FIG.

Symbol Description:

1 warm white chip, 2 second blue chip, 3 fluorescent diaphragm, 4 LED electrodes.

detailed description

In order to have a clearer understanding of the technical features, purpose and beneficial effects of the present utility model, the technical solution of the present utility model is described in detail below, but it should not be construed as limiting the practical scope of the utility model.

Example 1

This embodiment provides a colored LED lamp bead, which includes four primary color chips and a substrate, wherein the four primary color chips are respectively a red chip, a green chip, a first blue chip and a warm white chip 1,

As shown in Figure 1, the warm white chip 1 is composed of a fluorescent film 3 of 90 μm-200 μm, a second blue chip 2 and an LED electrode 4. The fluorescent film 3 is attached to the surface layer of the second blue chip 2, and the fluorescent Diaphragm 3 is composed of UV film and phosphor silica gel film. The phosphor silica gel film is formed by mixing phosphor powder and silica gel. The mass ratio of phosphor powder to silica gel is 4:1. The phosphor powder is composed of yellow phosphor, red phosphor and The green phosphor is mixed and formed. Based on the mass ratio of phosphor as 100%, the mass ratio of yellow phosphor, red phosphor and green phosphor is (0-99): (0-99): (0-99);

The four primary color chips are arranged on the substrate in a square shape, as shown in Figure 2, the red chip, the warm white chip 1, the first blue chip and the green chip are arranged in a counterclockwise order, and the red chip and the first blue chip are arranged in a counterclockwise order. Diagonal setting, green chip and warm white chip 1 are arranged diagonally;

There is one positive pin and four negative pins on the substrate, the four negative pins include red negative pin, green negative pin, first blue negative pin and warm white negative pin,

The anode pins are electrically connected to the anodes of the four primary color chips respectively,

The red negative pin is electrically connected to the negative pole of the red chip, the green negative pin is electrically connected to the negative pole of the green chip, the first blue negative pin is electrically connected to the negative pole of the first blue chip, and the warm white negative pin is electrically connected to the warm white negative pin. The negative electrode of wafer 1 is electrically connected.

The color temperature of the warm white chip 1 of the color LED lamp bead of this embodiment is 2700K-3000K, and the display index is ≥ 80. The color light LED lamp bead is adjusted by the warm white chip 1 .

The colored light LED lamp bead of this embodiment is made through the following steps:

(1) Adsorb a square UV film with a thickness of 85μm-200μm and a side length of 200mm-400mm evenly on the workbench, then introduce a photoresist of 10μm-100μm and level it, and then heat it at 80℃-200℃ Bake at high temperature for 30min-300min to obtain UV and photoresist film;

(2) Cover the mask plate on the UV and photoresist film, then expose it to 250nm-410nm ultraviolet light for 0.1-30s, then develop it in the developer at a temperature of 90°C-150°C for 1min-300min and use deionization Washing with water to obtain a UV and photoresist film loaded with a circular photoresist column with a diameter of 90 μm-200 μm or a square photoresist column with a side length of 90 μm-200 μm;

(3) Mix the phosphor powder and the silicone liquid at a mass ratio of 4:1, and then introduce it onto the UV and photoresist film obtained in step (2), level off and solidify, and use a film scraping machine to press the film, UV and photoresist film The photoresist film passes through the two rollers of the film scraping machine, and the thickness between the two rollers is controlled by the film scraping machine. After the film is pressed, it is tested with a microscope, and finally a composite film of 90μm-200μm is obtained;

(4) Bake the composite film at a temperature of 100°C-200°C for 10min-300min, and then place it in a photoresist etching solution to remove the photoresist to form a circle with a diameter of 90μm-200μm or a side length of Fluorescent film 3 of square LED electrode 4 of 90 μm-200 μm;

(5) Fix the red chip, the second blue chip 2, the first blue chip and the green chip on the substrate in counterclockwise order to obtain the prefabricated substrate material;

(6) Put the prefabricated substrate material into a professional film laminating machine, and then use dispensing equipment to apply a small amount of glue on the surface of the second blue chip 2, and use the film laminating machine to suck up the fluorescent film 3 and stick it tightly on the second blue chip. The surface of the blue chip 2 is then baked at a temperature of 90°C-200°C for 10min-300min, so that the second blue chip 2 becomes a warm white chip 1, so that it is compatible with the red chip, the first blue chip, and the green chip Combined to form a warm light source to obtain LED substrate materials;

(7) The LED substrate material is sequentially subjected to wire bonding, compression molding, cutting, light splitting, tape and packaging to obtain colored LED lamp beads;

Among them, the phosphor is formed by mixing yellow phosphor, red phosphor and green phosphor. Based on the mass ratio of phosphor as 100%, the mass ratio of yellow phosphor, red phosphor and green phosphor is (0-99) : (0-99): (0-99), the color of the color LED lamp bead in this embodiment is adjusted by adjusting the ratio between phosphors;

The strength of the UV film before exposure to ultraviolet light is 10 N/mm ² -30 N/mm ² , and the strength after exposure to ultraviolet light is 0.01 N/mm ² -0.1 N/mm ² .

It can be known from Example 1 that the colored light LED lamp beads provided by the utility model can use the light source combined with red, blue, green and warm white to emit colorful light with a warmer tone, giving people a warm and comfortable feeling, and solving the problem of red, blue, green and warm white. The problem of colder colored light caused by the cool-white combined light source LED; at the same time, the colored light LED lamp bead has a wider color temperature range and display index than the traditional colored light LED lamp bead, and can display more colorful colors. Moreover, the colored light LED lamp bead provided by the utility model has a simple preparation process and is suitable for large-scale production.

Claims (3)

1. a kind of glory LED lamp bead, it includes four primary colors chips and substrate, it is characterised in that：Four primary colors chip point Not Wei red chip, green chip, the first blue dies and warm white chip, the warm white chip is by fluorescence diaphragm and second Blue dies laminating is formed, and the fluorescence diaphragm is attached to the top layer of second blue dies, and four primary colors chips are in field Font is set on the substrate, and the red chip, warm white chip, the first blue dies and green chip are by counterclockwise Order is arranged.

2. glory LED lamp bead according to claim 1, it is characterised in that：The colour temperature of the warm white chip is 2700K- 3000K, shows index >=80.

3. glory LED lamp bead according to claim 1, it is characterised in that：A positive pole pin is provided with the substrate With four negative pins, four negative pins include red negative pin, the negative pin of green, the negative pin of the first blueness and warm white Color bears pin, and positive pole of the positive pole pin respectively with four primary colors chips is electrically connected, the red negative pin with it is described The negative pole electrical connection of red chip, the negative pin of green is electrically connected with the negative pole of the green chip, and first blueness is negative Pin is electrically connected with the negative pole of first blue dies, and the negative pole that the warm white bears pin and the warm white chip is electrically connected Connect.