CN110680937B - Ultraviolet LED light homogenizing device and application thereof - Google Patents

Abstract

An ultraviolet LED light homogenizing device and application thereof, wherein the ultraviolet LED light homogenizing device comprises a light homogenizing cup for homogenizing light; a first-stage step of the dodging cup and a second-stage step of the dodging cup are arranged on the inner wall of the dodging cup; the second layer of light homogenizing film is arranged on the second-stage step of the light homogenizing cup and is used for realizing the first-step light homogenizing; the first layer of light homogenizing film is arranged on the first stage of the light homogenizing cup and is used for realizing second step light homogenizing; an ultraviolet LED as a light source; and the aluminum substrate is arranged at the bottom of the dodging cup and used for fixing the ultraviolet LED. The ultraviolet LED light homogenizing device has the advantages of small working current, low device temperature, simple implementation process and short production period, can be applied to the field requiring ultraviolet LED light homogenizing, has low cost, and can be accepted by most factories and applicable people.

Description

Ultraviolet LED homogenization device and its application

technical field

The invention relates to the technical field of ultraviolet LED uniform light, in particular to an ultraviolet LED uniform light device and its application.

Background technique

With the continuous improvement of the light power of ultraviolet LED, it has been applied to many fields such as curing, medical treatment, and home appliances. However, because it is a point light source, the light emitted cannot be evenly irradiated on the required position, and the effect will be uneven. Qi, so people are working on the uniform light design of UV LEDs. Ultraviolet homogenization requirements: The material has strong ability to transmit ultraviolet rays, is resistant to irradiation, and is not easy to yellow and deform. However, UV LED homogenization is different from visible light or infrared. General materials such as homogenizing plates used for visible light cannot transmit ultraviolet rays. At present, the best UV-transmitting material on the market is quartz glass. People design different structures through optics to roughen quartz. The surface and other methods can achieve the purpose of uniform light, but the cost of quartz is high, it is difficult to shape, and the production cycle is long. At the same time, as the thickness of quartz increases, its ability to absorb ultraviolet rays becomes stronger and radiates less ultraviolet rays. In order to make up for the missing ultraviolet rays, it must Increase the working current of the LED to increase the light output rate. The temperature of the LED will continue to rise due to the increase of the current, and the performance of the ultraviolet LED will decrease. Therefore, the heat dissipation problem must be considered while studying the uniform light. Most of these complicated solutions only appear in the laboratory and cannot be used. The application is implemented and mass production is formed.

In order to better apply UV LEDs in various industries and improve the use effect, it is necessary to invent a UV LED homogenization device. The device features: small operating current, low device temperature, simple implementation process, short production cycle, and can be applied In the field where ultraviolet LED uniform light is required, the cost is low, and it can be accepted by most manufacturers and applicable people.

Contents of the invention

In view of this, one of the main purposes of the present invention is to provide an ultraviolet LED homogenization device and its application, in order to at least partially solve at least one of the above technical problems.

In order to achieve the above object, as an aspect of the present invention, a UV LED homogenization device is provided, including:

Uniform light cup, play the role of uniform light;

The first step of the uniform light cup and the second step of the uniform light cup are arranged on the inner wall of the uniform light cup;

The second layer of uniform light film is set on the second step of the uniform light cup to achieve the first step of uniform light;

The first layer of uniform light film is set on the first step of the uniform light cup to achieve the second step of uniform light;

UV LEDs, as light sources; and

The aluminum substrate is set at the bottom of the uniform light cup and is used to fix the ultraviolet LED.

As another aspect of the present invention, an application of the above light dodging device in the light dodging field is also provided.

Based on the above technical solutions, it can be known that the UV LED homogenization device of the present invention and its application have at least one of the following advantages compared with the prior art:

1. The ultraviolet LED homogenization device of the present invention has small working current, low device temperature, simple implementation process, and short production cycle. It can be applied in fields that require ultraviolet LED homogenization. The cost is low, and it can be accepted by most manufacturers and applicable people;

2. A single ultraviolet LED emits a point light source, and the radiation intensity received at the same distance from the LED is inconsistent, which cannot achieve the ideal sterilization and disinfection effect. In order to achieve consistent light output, uniform light treatment must be carried out. However, after ultraviolet rays, especially deep ultraviolet rays, pass through the traditional acrylic uniform plate, most of the light is absorbed by the uniform plate and cannot be scattered to the outside. High-quality quartz materials have a high transmittance to ultraviolet rays. To achieve uniform light, the quartz surface must be done. Optical design and roughening treatment, but the price of quartz is high, which increases the cost of ultraviolet application products, and the realization of secondary optical design is also very complicated;

3. The homogeneous film made of polytetrafluoroethylene has good transmittance to ultraviolet light, and the material has very stable chemical properties, high temperature resistance, acid and alkali resistance, and ultraviolet light resistance, which is far lower than the price of quartz. The surface of the PTFE film is rough, and the ultraviolet rays are emitted in different directions after penetrating, changing the light output form of the point light source to achieve a uniform light effect. The uniform light film itself absorbs less ultraviolet rays, and most of the ultraviolet rays are refracted by the uniform film Part of it is reflected or scattered to the reflective cup. After multiple reflections by the specular reflective cup, more than 95% of the ultraviolet light is evenly scattered with the cooperation of the uniform film and the reflective cup to achieve a uniform light effect.

Description of drawings

Fig. 1 is a schematic structural diagram of an ultraviolet LED homogenization device according to an embodiment of the present invention.

Explanation of reference signs:

1. The first layer of uniform light film; 2. The second layer of uniform light film; 3. The uniform light cup; 3-1, the first step of the uniform light cup; 3-2, the second step of the uniform light cup; 4. UV LED ; 5- aluminum substrate.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

The invention discloses an ultraviolet LED uniform light device, comprising:

Uniform light cup, play the role of uniform light;

The first step of the uniform light cup and the second step of the uniform light cup are arranged on the inner wall of the uniform light cup;

The second layer of uniform light film is set on the second step of the uniform light cup to achieve the first step of uniform light;

The first layer of uniform light film is set on the first step of the uniform light cup to achieve the second step of uniform light;

UV LEDs, as light sources; and

The aluminum substrate is set at the bottom of the uniform light cup and is used to fix the ultraviolet LED.

Wherein, the material used for the first layer of uniform film and the second layer of uniform film includes polytetrafluoroethylene material.

Wherein, the transmittance of the first layer of uniform film and the second layer of uniform film to ultraviolet light is 85% to 100%.

Wherein, the thicknesses of the first layer of uniform film and the second layer of uniform film are both 0.1 to 0.2 mm.

Wherein, the thickness of the first layer of uniform film is smaller than the thickness of the second layer of uniform film.

Wherein, the material used for the uniform light cup includes aluminum or plastic.

Wherein, the uniform light cup is semi-elliptical.

Wherein, the inner wall of the uniform light cup is coated with a specular reflective layer.

Wherein, the wavelength of the ultraviolet LED is less than 350 nanometers;

Wherein, the aluminum substrate is provided with a fluorinated material for improving reflectivity.

The invention also discloses the application of the above-mentioned light uniformity device in the field of LED light uniformity.

In an exemplary embodiment, the ultraviolet LED uniform light device of the present invention includes: a first layer of uniform light film 1, a second layer of uniform light film 2, a uniform light cup 3, a step 3-1 of the uniform light cup, a uniform light The second step of the light cup is 3-2, the ultraviolet LED is 4, and the aluminum substrate is 5.

In some embodiments of the present invention, both the first layer of uniform film 1 and the second layer of uniform film 2 are polytetrafluoroethylene materials that reflect ultraviolet rays; the second layer of uniform film is used to primarily change the direction of refraction and reflection of ultraviolet rays , to scatter ultraviolet light to achieve the first step of uniform light, and the first layer of uniform light film is used to further change the direction of ultraviolet refraction and reflection, and further scatter ultraviolet light to achieve the second step of uniform light.

In some embodiments of the present invention, the transmittance of the first layer of uniform film 1 and the second layer of uniform film 2 to reflect ultraviolet rays is 85% to 100%;

In some embodiments of the present invention, the thickness range of the first uniform film 1 and the second uniform film 2 is between 0.1 mm and 0.2 mm, and the thickness of the first uniform film 1 is smaller than that of the second layer. The thickness of uniform light film 2;

In some embodiments of the present invention, the uniform light cup 3 is made of aluminum or plastic, in a semi-elliptical shape, and the inner wall is coated with a mirror reflective layer;

In some embodiments of the present invention, the uniform light cup has a first-level step 3-1 on the edge of the uniform light cup, and the inner wall of the uniform light cup 3 has two-level steps 3-2, and the two steps fix the first layer of uniform light film 1 and The second layer of homogeneous film 2;

In some embodiments of the invention, the wavelength range of the ultraviolet LED 4 is less than 350 nm;

In some embodiments of the present invention, the ultraviolet LED 4 is welded on the heat-dissipating aluminum substrate 5, on which the fluorinated material is adhered, and the aluminum substrate 5 is adhered to the bottom of the uniform light cup.

The technical solution of the present invention will be further elaborated below through specific embodiments in conjunction with the accompanying drawings. It should be noted that the following specific embodiments are only for illustration, and the protection scope of the present invention is not limited thereto.

As shown in Fig. 1, the ultraviolet LED uniform light device of this embodiment includes: a first layer of uniform light film 1, a second layer of uniform light film 2, a uniform light cup 3, a first step of the uniform light cup 3-1, a uniform light Cup two steps 3-2, UV LED 4, aluminum substrate 5.

Among them, the first layer of uniform film 1 and the second layer of uniform film 2 are both light-transmitting polytetrafluoroethylene materials that transmit 85% to 100% of ultraviolet rays, especially ultraviolet rays with a wavelength of less than 350nm. The ability to absorb ultraviolet rays is weak, and most of the light is reflected or refracted, and is not absorbed by fluorinated materials. The fluorinated materials have high resistance to ultraviolet radiation and are not easy to age.

Among them, the thickness range of the first uniform film 1 and the second uniform film 2 is between 0.1 mm and 0.2 mm, and the light output ability in this range is strong, and the thickness of the first uniform film 1 is smaller than that of the second uniform film. The thickness of the light film 2, the ultraviolet rays diffuse through the second layer of homogenizing film 1 and distribute the ultraviolet rays to achieve the first-level uniform light effect. After passing through the first layer of homogenizing film 2, the ultraviolet rays are evenly scattered.

Among them, the material of the uniform light cup 3 is aluminum or plastic, in a semi-elliptical shape, which is beneficial to light reflection and homogenization. The inner wall is coated with a reflective layer, and the reflective layer reflects the ultraviolet rays reflected by the uniform light film. Continuous reflection and refraction, and finally the ultraviolet rays are scattered by the uniform film, and only a small part is absorbed by the uniform device.

There are two steps 3-2 on the edge of the dodging cup, and a step 3-1 on the inner wall of the dosing cup 3, and the first dodging film 1 and the second dosing film 2 are bonded to the two steps.

The uniform light system of this embodiment is suitable for the LED point light source uniform light system, especially suitable for the uniform light requirements of ultraviolet LEDs with a wavelength of less than 350nm.

The ultraviolet LED 4 of this embodiment is welded on the heat dissipation aluminum substrate 5, and the heat dissipation aluminum substrate is bonded to the bottom of the uniform light cup.

The ultraviolet LED 4 of this embodiment is welded on the heat-dissipating aluminum substrate 5, the LED part is exposed on the aluminum substrate 5, and fluorinated materials are stuck on other positions to improve the light reflectivity and reduce the light absorption of the aluminum substrate 5, and the aluminum substrate 5 is bonded to the uniform light cup bottom of.

Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (4)

1. An ultraviolet LED dodging device, comprising:

a light homogenizing cup for homogenizing light;

a first-stage step of the dodging cup and a second-stage step of the dodging cup are arranged on the inner wall of the dodging cup;

the second layer of light homogenizing film is arranged on the second-stage step of the light homogenizing cup and is used for realizing the first-step light homogenizing;

the first layer of light homogenizing film is arranged on the first stage of the light homogenizing cup and is used for realizing second step light homogenizing;

an ultraviolet LED as a light source; and

the aluminum substrate is arranged at the bottom of the dodging cup and used for fixing the ultraviolet LEDs;

wherein the first layer of light homogenizing film and the second layer of light homogenizing film are made of polytetrafluoroethylene materials; the thickness of the first layer of light homogenizing film and the second layer of light homogenizing film is 0.1-0.2 mm; the light homogenizing cup is semi-elliptic; the inner wall of the dodging cup is plated with a mirror reflection layer; the wavelength of the ultraviolet LED is less than 350 nanometers; and the aluminum substrate is provided with a fluoride material for improving reflectivity.

2. The dodging device as claimed in claim 1, wherein,

the thickness of the first layer of uniform light film is smaller than that of the second layer of uniform light film.

3. The dodging device as claimed in claim 1, wherein,

the light homogenizing cup is made of aluminum or plastic.

4. Use of a light homogenizing device according to any of the claims 1-3 in the field of LED light homogenizing.

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