CN114321748A

CN114321748A - White light source device

Info

Publication number: CN114321748A
Application number: CN202111629121.9A
Authority: CN
Inventors: 林秀; 林耀
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-12

Abstract

The invention relates to a white light source device, which comprises a blue light generating device and a fluorescent carrier, wherein the fluorescent carrier is made of a transparent and heat-conducting base material and is arranged behind the blue light generating device; the partial area of the fluorescent carrier is covered with a fluorescent material, so that the blue light incident to the fluorescent carrier is converted into yellow light after passing through the fluorescent material; the partial area of the fluorescent carrier is not covered with the fluorescent material, so that the blue light incident to the fluorescent carrier still maintains the blue light; the unconverted blue light and the converted yellow light mix to form white light. The invention has the beneficial effects that: the device structure and the distribution mode of fluorescent materials are optimized, the number of optical components is reduced, and the production cost of the product is reduced while the light utilization rate is ensured. On the other hand, the light path is simpler, the configuration of the light source device components is convenient, and favorable conditions are provided for further reducing the volume of the light source device.

Description

White light source device

Technical Field

The invention relates to the field of optics, in particular to a white light source device with a simple structure.

Background

At present, light source equipment is continuously designed towards the direction of complexity to ensure that the light utilization rate is improved, and if optical components can be reduced on the premise of not reducing the light utilization rate, the cost can be reduced and the application range of the light source equipment can be improved.

ZL2013800758658 discloses a light source device, which optimizes an early light source device, but needs to be provided with an optical mirror for reflection and transmission and diffuse reflection through a fluorescent wheel, and meanwhile, the optical mirror needs to be subjected to optical coating and regional design, so that the whole structure is complex.

Disclosure of Invention

The invention aims to: a white light source device is provided, which has the advantages of simple structure and low manufacturing cost.

The invention is realized by the following technical scheme: a blue light generating device 1 for generating blue light;

the fluorescent carrier 2 is made of transparent and heat-conducting base materials and is arranged behind the blue light generating device 1;

wherein, a part of the area of the fluorescent carrier 2 is covered with the fluorescent material 21, so that the blue light incident to the fluorescent carrier 2 is converted into yellow light after passing through the fluorescent material 21;

meanwhile, a part of the area of the fluorescent carrier 2 is not covered with the fluorescent material 21, so that the blue light incident to the fluorescent carrier 2 still maintains the blue light;

the unconverted blue light and the converted yellow light mix to form white light.

Compared with the prior art, the invention has the beneficial effects that:

1. the present case has optimized equipment structure and fluorescent material's distribution mode, has reduced optical component's number, has reduced the manufacturing cost of product when guaranteeing light utilization ratio.

2. The light path is simpler, the configuration of the light source device component is convenient, and favorable conditions are provided for further reducing the volume of the light source device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a distribution diagram of the fluorescent material in the fluorescent carrier of example 1;

FIG. 3 is a distribution diagram of the fluorescent material in the fluorescent carrier of example 2;

FIG. 4 is a distribution diagram of the fluorescent material in the fluorescent carrier of example 3;

FIG. 5 is a schematic structural view of the structure of FIG. 1 after being wrapped by a case;

FIG. 6 is an enlarged view taken at A in FIG. 5;

fig. 7 is a schematic structural view of adding multiple lens groups to fig. 5.

Description of reference numerals: 1 blue light generating device, 11 collimating lens, 2 fluorescent carrier, 21 fluorescent material, 22 coating, 23 diffusion plate, 3 first multi-lens group, 4 second multi-lens group.

Detailed Description

The invention is described in detail below with reference to the following description of the drawings:

in the description of the present invention, it is to be understood that the terms "front", "back", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1: a white light source device comprises

A blue light generating device 1 for generating blue light;

In the present case, the blue light generating device is a blue LED/blue laser device, and generally, the blue light generating device is matched with the collimating lens 11 to convert the blue light into parallel light and output the parallel light.

The fluorescent carrier can be made of transparent material with good heat conduction effect, such as sapphire. This enables heat generated by the fluorescent material to be transferred through the fluorescent carrier.

When the layout of the fluorescent material is performed, in order to take heat dissipation into consideration, the fluorescent material covers the periphery of the blue light irradiation region as much as possible, and the region not covered with the fluorescent material forms a blue light passing region.

According to the number, the area and the position of the blue light passing area, the following embodiments can be derived:

example 1

As shown in fig. 2: the blue light irradiation area is set to be circular, the middle part of the fluorescent material irradiation area is provided with a blue light passing area, and other irradiation areas are coated with fluorescent materials.

If the light in the blue light irradiation region can be ensured to be uniform, the scheme of the embodiment 1 can basically meet the requirements of the scheme, and the white light is formed by mixing the blue light and the yellow light. In order to improve the uniformity of light spots, a necessary light mixing and homogenizing lens can be added behind the fluorescent body.

Example 2

As shown in fig. 3 and 4: the blue light passing area is set to be circular, a plurality of blue light passing areas which are uniformly distributed are set in the fluorescent material irradiation area, and the other irradiation areas are coated with the fluorescent material.

The better the uniformity of the blue light passing area, the better the uniformity and consistency of the white light.

In the above 2 embodiments, when designing the area ratio of the fluorescent material, the area illumination intensity needs to be considered, i.e. a balance needs to be found between the two.

At present, experiments show that the preferential scheme is that the ratio of the illumination intensity of yellow light to the illumination intensity of blue light is generally set to be about 4:1, and the required white light color temperature can be obtained.

As shown in fig. 5: the scheme can be used for packaging related equipment. The fixing device can also be arranged at a designated position according to actual needs without packaging, and only the fact that each component can be fixed by a carrier is ensured.

As shown in fig. 6: the fluorescent material is arranged on the back side surface of the fluorescent carrier. The fluorescent material is arranged on the back side of the fluorescent carrier, so that the fluorescent carrier can partially reflect yellow light.

Furthermore, a coating for reflecting yellow light is arranged between the fluorescent material and the fluorescent carrier. Considering that blue light is incident on the fluorescent material and generates yellow light, part of the yellow light is reflected to irradiate forward, resulting in a decrease in light efficiency. Therefore, the plating layer is added, the plating layer can reflect yellow light and ensure the passing property of blue light, thereby ensuring the output quantity of the yellow light and improving the light utilization rate.

As shown in fig. 7: furthermore, a first multi-lens group is arranged between the blue light generating device and the fluorescent carrier. Because blue light generating device is mostly laser device, and its light directive property that sends is very strong, and energy is concentrated on central point more, even if turn into the parallel light through collimating lens, nevertheless because light density is not even (middle part density is high, density is low around) to whole blue light irradiation area, in order to realize the homogenization, so consider to increase first many lens group, let the even fluorescence carrier that jets into of light, realize light density homogenization. Further reducing the proportion error of blue and yellow light rays and ensuring the color temperature consistency of white light.

A first plurality of lens groups is added. The problem of different intensity regions of the incident blue light is not taken into account, and it is possible to default to a substantially uniform intensity of the light incident on the respective regions of the fluorescent support, and then to ensure that the area ratio between the regions covered with fluorescent material and the regions not covered with fluorescent material is 4:1 (blue light irradiation region).

As shown in fig. 7: furthermore, a second multi-lens group is arranged behind the fluorescent carrier. The parallel light of blue and yellow light rays input into the second multi-lens group is separated and mixed into uniform white light.

In addition, in order to improve the light extraction effect, a diffusion plate 23 may be added in the blue light transmission region (the region where the fluorescent material 21 is not covered by the fluorescent carrier 2), and the blue light is diffused and then mixed with the yellow light.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A white light source device characterized by: comprises that

A blue light generating device (1) for generating blue light;

the fluorescent carrier (2) is made of transparent and heat-conducting base materials and is arranged behind the blue light generating device (1);

wherein a partial area of the fluorescent carrier (2) is covered with a fluorescent material (21), so that the blue light incident on the fluorescent carrier (2) is converted into yellow light after passing through the fluorescent material (21);

meanwhile, a part of the area of the fluorescent carrier (2) is not covered with the fluorescent material (21), so that the blue light incident to the fluorescent carrier (2) still maintains the blue light;

2. The white light source device according to claim 1, characterized in that: the fluorescent material (21) is arranged on the rear side surface of the fluorescent carrier (2).

3. The white light source device according to claim 2, characterized in that: a plating layer (22) for reflecting yellow light is arranged between the fluorescent material (21) and the fluorescent carrier (2).

4. The white light source device according to claim 1, characterized in that: a first multi-lens group (3) is arranged between the blue light generating device (1) and the fluorescent carrier (2).

5. The white light source device according to claim 1, characterized in that: and a second multi-lens group (4) is arranged behind the fluorescent carrier (2).