CN201688222U - LED bulb with double-layer lampshade - Google Patents

Abstract

An LED bulb with a double-layer lampshade relates to an LED bulb. Including a lamp shade totality, LED chip, phosphor powder layer and base, the lamp shade totality includes inlayer lamp shade and outer lamp shade, and the inlayer lamp shade is under the shroud of outer lamp shade, and LED chip, inlayer lamp shade and outer lamp shade set gradually from inside to outside, and the phosphor powder layer coating is on the face that the inlayer lamp shade leaned on the LED chip. The beneficial effects are that: the fluorescent powder layer is uniformly coated on the inner surface of the inner layer lampshade, so that the problems that in the prior art, the heat dissipation performance is poor due to the fact that the fluorescent powder layer is attached to the LED chip with high heat, the fluorescent powder layer is quenched and aged at high temperature, and the light emitting efficiency is reduced are solved, and the reliability of the LED chip and the fluorescent powder layer and the light emitting lumen of the LED bulb are improved; when the outer layer lampshade of the LED lamp is broken, the inner layer lampshade can also play a role in protection, the use safety is improved, and particularly the protection effect can be exerted on the application and illumination of the alternating current LED.

Description

A kind of LED light bulb with double-layer lampshade

technical field

The utility model relates to an LED bulb, in particular to an LED bulb with a double-layer lampshade.

Background technique

LED light source has the advantages of using low-voltage power supply, less energy consumption, strong applicability, high stability, short response time, no pollution to the environment, and multi-color light emission. Phosphor powder is generally used in LED light sources, and its function is to combine light and color to form white light. As shown in Figure 1, the traditional phosphor coating method is to mix the phosphor with silicone potting, and then apply it on the chip. Studies have shown that as the temperature rises, the quantum efficiency of phosphors decreases, the light output decreases, and the radiation wavelength will also change, which will cause changes in the color temperature, chromaticity, and lumens of white LEDs. Higher temperatures will also accelerate the aging of phosphors. In addition, there are also problems with the thermal stability of potting glue and phosphors at high temperatures.

Although it is said that white light is formed by adding yellow phosphor powder to blue LEDs, with the gradual increase in luminous efficiency of white LEDs, it is more and more possible to apply white LEDs in the field of lighting, but to achieve the required lumens for lighting, No matter which method is used, it is necessary to deal with extremely high heat in a very small LED package. If the component cannot dissipate the heat, in addition to various packaging materials, there will be product reliability due to the difference in expansion coefficient between each other. The problem is that the luminous efficiency of the chip will decrease significantly as the temperature rises, which will significantly shorten the service life and increase the cost of lumens. Therefore, how to improve the luminous lumens of LEDs has become an important issue in current LED applications.

On the other hand, the current traditional LED light bulbs only have one layer of lampshade. When the lampshade is broken, the LED will still work as usual, so users may have the risk of electric shock due to direct contact with the power supply on the circuit board, especially in AC LED bulbs. In the use of lighting, there are great hidden dangers.

Utility model content

The main purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and to provide an LED light bulb with a double-layer lampshade that can change the color temperature, increase LED luminous lumens and improve safety by using the double-layer lampshade.

In order to achieve the above purpose, an LED light bulb with a double-layer lampshade of the present invention adopts the following technical solutions.

Construct an LED light bulb with double-layer lampshades, including a lampshade as a whole, LED chips, a phosphor layer and a base, characterized in that: the lampshade as a whole includes an inner lampshade and an outer lampshade, and the inner lampshade is located between the outer lampshade Under the cover, the LED chip, the inner lampshade and the outer lampshade are sequentially arranged from the inside to the outside, and the phosphor layer is coated on the side of the inner lampshade close to the LED chip.

The above-mentioned technical scheme is further elaborated:

There is a gap between the inner lampshade and the outer lampshade.

There is a gap between the LED chip and the inner lampshade.

The overall material of the lampshade can be any light-transmitting material; or glass, or plastic (such as PC, PS, etc.), or acrylic (PMMA) or the like, and the inner lampshade can be flat or round. Curved; the coated phosphor layer can be added with different proportions of phosphors according to requirements to achieve different color temperature requirements (such as blue LED plus yellow phosphor to produce white light), or increase the percentage of color rendering.

Compared with the prior art, the utility model has the following beneficial effects:

1. By uniformly coating the phosphor layer on the inner surface of the inner lampshade (that is, on the side close to the LED chip), there is a gap between the phosphor layer and the LED chip, so that the phosphor layer can be pulled apart from the high-heat LED wick It avoids the problem of the traditional technology that the heat dissipation performance is deteriorated due to the phosphor layer being attached to the high-heat LED chip, the phosphor layer is quenched and aged by high temperature, and the luminous efficiency is reduced, thereby improving the LED chip and phosphor. Layer reliability and lumens of light from LED bulbs.

2. The inner surface of the inner lampshade is coated with fluorescent powder, which can achieve different color temperatures by changing the ratio of fluorescent powder, which further meets the needs of users for LED bulbs with different color temperatures (such as blue LED plus yellow fluorescent powder) white light); it can also be used to increase the percentage of color rendering.

3. When the outer lampshade of the LED lamp is broken, the inner lampshade can also play a protective role, which improves the safety of use, especially in the application of AC LED lighting, it can better play its protective role.

4. The double-layer lampshade composed of the inner lampshade and the outer lampshade can also solve the problems of glare and point light source that LED lamps often have.

Description of drawings

Figure 1 is a schematic diagram of a traditional LED light bulb.

Fig. 2 is a partial cross-sectional view of the utility model in which the inner lampshade is arc-shaped.

Fig. 3 is a partial cross-sectional view of the utility model in which the inner lampshade is a plane.

Fig. 4 is a sectional view of MR16 of the present utility model.

Fig. 5 is a cross-sectional view of the PAR lamp of the present invention.

Fig. 6 is a schematic diagram of the rupture of the outer lampshade of the present invention.

In the figure: 1. Overall lampshade; 11. Inner lampshade; 12. Outer lampshade; 2. LED chip; 3. Phosphor powder; 4. Base.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 2 to 5, the utility model is a LED light bulb with a double-layer lampshade, which includes a lampshade overall 1, LED chip 2, phosphor layer 3 and base 4, and the lampshade overall 1 includes an inner lampshade 11 and the outer lampshade 12, the inner lampshade 11 is under the cover of the outer lampshade 12, the LED chips 2, the inner lampshade 11 and the outer lampshade 12 are arranged sequentially from the inside to the outside, and the phosphor layer 3 is coated inside The layer lampshade 11 is on the side close to the LED chip 2 .

There is a gap between the inner lampshade 11 and the outer lampshade 12 .

There is a gap between the LED chip 2 and the inner lampshade 11 .

The inner lampshade 11 can be flat or arc-shaped.

The material of lampshade overall 1 can be any transparent material; or glass, or plastic (such as PC, PS etc.), or acrylic (PMMA) etc.,

The LED chip 2 and its circuit board, as well as the overall lampshade 1 are installed on the base 4 .

The inner lampshade 11 can be flat or arc-shaped, and the phosphor layer 3 is coated on the inner surface of the inner lampshade 11, and can be formulated into various proportions and different colors to achieve various color temperatures. Demand (such as blue LED plus yellow phosphor to produce white light), or increase the percentage of color rendering.

When the LED chip 2 emits light, high temperature is generated. Since the phosphor powder 3 is not mixed in the sealing glue of the LED chip 2, but is coated on the inner surface of the inner lampshade 11 of the overall lampshade 1, the phosphor powder 3 is avoided. Phosphor powder in layer 2 has the problem of temperature quenching and aging due to direct contact with high-temperature LED chips, which deteriorates the phosphor powder and reduces luminous efficiency, thereby improving the reliability of phosphor powder layer 2 and the light output lumens of LEDs.

When the outer lampshade 12 of the LED bulb is broken (as shown in Figure 6), the LED chip 2 will work as usual, so the user may have the risk of directly touching the power supply on the circuit board. Finally, it can also play the role of protecting consumers, especially in the application of AC LED lighting, it can play its protective role.

Of course, the above embodiment of the LED light bulb with double-layer lampshade is only to illustrate rather than limit the utility model. The above is only a preferred embodiment of the utility model, and all equivalent Changes or modifications all belong to the protection scope of the present utility model.

Claims (5)

1. A LED light bulb with a double-layer lampshade, comprising a lampshade overall (1), LED chip (2), phosphor layer (3) and base (4), characterized in that: said lampshade overall (1) comprises The inner lampshade (11) and the outer lampshade (12), the inner lampshade (11) is under the cover of the outer lampshade (12), the LED chip (2), the inner lampshade (11) and the outer lampshade ( 12) Arranging sequentially from the inside to the outside, the phosphor layer (3) is coated on the side of the inner lampshade (11) close to the LED chip (2). 2. The LED light bulb with double-layer lampshade according to claim 1, characterized in that there is a gap between the inner lampshade (11) and the outer lampshade (12). 3. The LED light bulb with double-layer lampshade according to claim 1, characterized in that there is a gap between the LED chip (2) and the inner lampshade (11). 4. A LED light bulb with double-layer lampshade according to claim 1, characterized in that: the inner lampshade (11) can be flat or arc-shaped; the material of the overall lampshade (1) can be transparent Light glass, or light-transmitting plastic. 5. The LED light bulb with double-layer lampshade according to claim 1, characterized in that: the LED chip (2) and its circuit board, and the overall lampshade (1) are installed on the base (4).

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