WO2020248625A1

WO2020248625A1 - Ld laser light source module for blocking blue light

Info

Publication number: WO2020248625A1
Application number: PCT/CN2020/077025
Authority: WO
Inventors: 陈国平; 李秀斌
Original assignee: 广州光联电子科技有限公司
Priority date: 2019-06-13
Filing date: 2020-02-27
Publication date: 2020-12-17
Also published as: CN110185948A

Abstract

The present invention relates to the technical field of illumination devices, and discloses an LD laser light source module for blocking blue light. The LD laser light source module comprises an LD light source, wherein light emitted from the LD light source is blue light; a laser connection plate is provided in a light-emergent channel of the LD light source, and a light-emergent through hole is provided in the laser connection plate; the size of the light-emergent through hole is smaller than the diameter of a light beam emitted by the LD light source on the laser connection plate; and the light-emergent through hole is used for limiting a light beam diameter range of the light emitted by the LD light source on the laser connection plate. Compared to the prior art, in the present invention, the laser connection plate is provided with the light-emergent through hole to limit the diameter range of the light beam emitted by the LD light source, such that excessive or scattered blue light is prevented from passing through the light-emergent through hole, and the beneficial effects of emergent light beams being more concentrated and a better light-emergent effect are achieved.

Description

An LD laser light source module for blocking blue light

Technical field

The present invention relates to the technical field of lighting devices, and more specifically, to an LD laser light source module that blocks blue light.

Background technique

The full English name of LD is Laser diode, and the Chinese name is laser semiconductor, which is also called laser diode. A laser is a device that amplifies light by induced emission. Existing laser semiconductors are generally used in fiber optic communications, optical disks, laser printers, laser scanners, laser pointers (laser pointers) and other fields. In the field of lighting, light source modules generally use LEDs as the light-emitting medium. LEDs are commonly called Semiconductor light-emitting diodes; and lighting products that use LD laser light source modules as light sources are relatively rare.

On the other hand, when the LD semiconductor laser diode is working, the light emitted is blue. At the same time, as shown in Figure 4, the light size range value X of each LD semiconductor laser diode is determined, and the light is emitted from the center to the surroundings. , Is the same shape as a horn. The available blue light range value Y of the light source module is variable and also a controllable value, but Y must be less than or equal to X (ie: Y≦X) to obtain the qualified blue light required by the product. Excess blue light or scattered blue light is not used for the entire light source module, but affects the light output effect. For example, when the entire light source module emits white light, if the blue light is not blocked, there will be stray light, and then there will be blue light at the light outlet, resulting in unsatisfactory light output.

technical problem

The present invention aims to overcome at least one of the above-mentioned drawbacks of the prior art, and provides a blue light blocking LD laser light source optical film, which is used to solve the current lack of technology in the flashlight industry using LD light source as the light-emitting medium, and the disadvantages of LD light source modules There is a technical problem that the light output port has the influence of blue light and the light output effect is not ideal.

Technical solutions

The technical solution adopted by the present invention is a blue-blocking LD laser light source module, including an LD light source, the light emitted by the LD light source is blue light, a laser connection board is provided on the light exit channel of the LD light source, and a light exiting board is provided on the laser connection board A through hole, wherein the size of the light exit hole is smaller than the diameter of the light beam of the LD light source on the laser connecting plate, and the light exit hole is used to limit the beam diameter range of the LD light source on the laser connecting plate.

In this technical solution, the LD light source emits light in a horn shape, and the emitted light is blue light. Among them, the light farther from the center of the light beam is scattered or redundant blue light, and has no use value. Therefore, this technical solution adopts the A light exit hole is provided on the light exit channel, and the light exit hole is used to restrict the passage of scattered or excess blue light, thereby making the light exit effect of the LD light source better and the light more concentrated.

In this technical solution, the shape of the light-exiting through hole can be set as required. Among them, the size of the light exit hole is smaller than the diameter of the original LD light source on the same plane. The shape of the light exit hole can be set to rectangle, square, circle, ellipse, rhombus, star, curved shape or irregular shape. Wait.

The light source module of this technical solution uses LD laser diode as the light source. The luminous power of the LD laser diode is high. The brightness of an LD light source is the sum of the brightness of hundreds of LEDs. Therefore, the same number of LD light sources and the same number of LED light sources In comparison, LD light source has higher color brightness, longer irradiation distance and higher definition; and the light emitted by LD light source has better wavelength characteristics, direction collimation characteristics and phase characteristics, which greatly improves the light output Distance, brightness and clarity

On the other hand, the LD laser light source module composed of LD laser diodes is a new technical solution. Since only a single chip LD laser diode is used as the light-emitting medium, the manufactured LD laser light source module meets the brightness requirements. At the same time, the product is smaller and more convenient to carry.

Further, the side walls of the light exit channel of the LD light source are sealed around so that the light beam of the LD light source can only be emitted from the light exit channel.

The side walls of the light-emitting channel of the LD light source are sealed around, which can effectively prevent the light from the LD light source from passing through the side walls and affect the light-emitting effect. Therefore, the sealing around the side wall of the light exit channel of the LD light source can make the light beam more concentrated.

Further, the light exit channel of the LD light source is provided with a reflective component and a powder sheet, the powder sheet is coated with yellow phosphor, and the reflective component is used to reflect the light beam emitted by the LD light source onto the powder sheet. The powder is combined with the light beam emitted by the LD light source to become white light, and then the white light is reflected by the powder sheet; wherein, the reflecting component and the powder sheet are arranged behind the light-emitting through hole.

The powder sheet is a non-transparent lens. After the yellow phosphor coated on the powder sheet is combined with blue light, it will become white light, which in turn makes the light beam of the LD light source a white light beam. Since the powder sheet is a non-translucent lens, the technical solution reflects the light beam of the LD light source onto the powder sheet through the reflective component, and then reflects the white light out through the powder sheet.

In this technical solution, if the light exit hole is not provided to limit the range of the light beam of the LD beam, the light beam exceeding a certain range is difficult to be reflected on the powder sheet, that is, this part of the light beam is not combined with the yellow phosphor on the powder sheet, resulting in The blue light beyond the range of the light beam is directly projected to the outside, resulting in more scattered light beams and poor light output effect. In this technical solution, since a light-emitting through hole is provided on the laser connecting plate, the light-emitting through hole limits the diameter range of the light beam, thereby preventing excess or scattered blue light from being projected to the outside.

Further, the light exit channel of the LD light source is provided with a lens assembly for uniform light.

Further, the light exit channel of the LD light source is provided with a diffuser assembly for auxiliary light extraction and uniform light.

Further, the light exit channel of the LD light source is provided with a lens assembly, a diffuser sheet assembly, a reflective assembly, and a powder sheet, wherein the lens assembly and the diffuser sheet assembly are used to assist the LD light source to emit light to improve the uniformity and concentration of light. Degree; the powder sheet is coated with yellow phosphor, the reflecting component is used to reflect the light beam emitted by the LD light source on the powder sheet, the yellow phosphor and the light beam of the LD light source are combined into white light, and then reflected by the powder sheet.

Further, the lens assembly includes a first lens and a second lens, the diffusion sheet assembly includes a first diffusion sheet and a second diffusion sheet, and the reflection assembly includes a reflector and a prism; wherein the first lens, the reflector, The first diffusion sheet, the prism, the second lens, the powder sheet, and the second diffusion sheet are sequentially arranged on the light exit channel of the LD light source. The reflector is used to reflect the light beam of the LD light source onto the prism. The light beam is reflected on the powder sheet. When the powder sheet reflects the light beam out, the light beam passes through the second lens again for homogenization.

In this technical solution, the light emitted by the LD light source is first projected on the first lens for homogenization, and then projected on the reflector through the first lens for reflection. The incident angle of the reflector is equal to the exit angle; the reflected beam is first projected on The first diffusion sheet is used to improve the uniformity of the light, and then is projected onto the prism through the first diffusion sheet, and the prism reflects the light beam on the powder sheet. The prism mainly plays the role of light reflection, and the prism reflects the light beam at a 90 degree angle, and is reflected by the prism to change the direction of the light path. The powder is coated with yellow phosphor, which acts as a yellow light reflector. Since the color of the LD light source is blue, the blue light will interact with the yellow phosphor to become white light after being projected on the powder. Since the powder is a non-transmissive lens, the blue light beam is projected on the powder to become white light, and it will be reflected by the powder again. The second lens and the second diffuser are successively arranged on the light exit channel of the white light to further homogenize the light beam and evenly transmit the light beam, so as to adjust the light beam and protect the lens. The white light beam passes through the second lens and the second lens in turn. The second diffuser is projected out.

Further, the powder sheet is arranged in parallel with the LD light source, and the main optical axis of the powder sheet and the LD light source are not on the same straight line.

The powder sheet and the LD light source are arranged in parallel, so that the direction of the light beam emitted from the LD light source is consistent with the direction of light reflected from the powder sheet; this arrangement also effectively saves space, so that the light beam can reflect light in an effective space.

Further, the first lens and the second lens are mounted on the laser connecting plate, wherein the light beam of the LD light source first passes through the first lens to homogenize, and then is projected from the light exit hole into the second lens for homogenization.

Further, it also includes a lens holder, the lens holder is arranged on the light-emitting surface of the laser connecting plate, the diffuser sheet assembly and the reflection assembly are installed in the lens holder, and the lens holder is provided with a level for installing the first diffuser sheet. Slots and inclined slots for mounting mirrors.

In this technical solution, the inclination angle of the reflecting mirror is 45°±0.15°. After the light beam is projected on the reflecting mirror, it shoots out of the prism in a vertical downward direction. The prism then reflects the light beam on the powder sheet at a 90-degree angle. . The first diffuser is installed on the horizontal groove of the lens holder, and the reflector is installed on the inclined groove of the lens holder. The inclined groove is inclined at 45 degrees with respect to the light path, so that the reflector reflects light at 45 degrees.

Further, it also includes a powder sheet fixing plate, and the powder sheet is installed on the powder sheet fixing plate.

Further, it also includes a laser welding board, the LD light source is mounted on the laser welding board; the back of the laser welding board is provided with a circuit board, the circuit board is connected to the power source, and the LD light source is electrically connected to the circuit board through the laser welding board, Realize circuit connection.

In this technical solution, the laser welding plate not only plays a role of welding and fixing the LD light source, but also plays a role of heat dissipation. The back of the laser welding board is additionally provided with radiator components, and the heat generated by the LD light source emits heat to the radiator components through the laser welding board. The LD light source is a BANK laser.

Further, it also includes a cover plate, which is arranged on the light-emitting surface of the lens holder to protect the lens holder and the second spreading sheet. The cover plate has a ring structure and the inner ring is hollowed out for light output.

Further, the two pins of the LD light source are provided with insulating sleeves. Since the pins of the LD light source are bare wires, the insulating sleeve can prevent short circuits, prevent static electricity, and provide insulation protection. Among them, the insulating sleeve can be installed on the pin of the LD light source through a production tool such as a hot blower.

Beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

(1) This technical solution limits the diameter range of the light beam from the LD light source by setting the light through hole on the laser connection plate, avoiding excess or scattered blue light from passing through the light through hole, thereby making the light beam more concentrated, and the light output effect is better.

(2) The LD laser light source module of this technical solution uses LD laser diode as the light-emitting medium. Compared with the light source module that uses the LED light source as the light-emitting medium in the prior art, it provides a new light source module design scheme for people Providing more light source module options not only expands the design field of light-emitting modules, but also satisfies people's needs.

(3) Compared with LED light-emitting diodes, LD laser diodes have better wavelength characteristics, direction collimation characteristics, phase characteristics and other effects, and LD laser diodes have high luminous power, high brightness, high definition and long luminous distance. Therefore, The use of LD laser diodes greatly improves the distance, brightness and clarity of the light.

(4) Since the LD laser light source module of this technical solution uses a single chip LD laser diode as the light-emitting medium, the LD laser light source module has a smaller volume and at the same time meets the requirements of brightness.

(5) The LD laser light source module adopts the technical solution of LD light source and the powder sheet arranged in parallel, which can effectively achieve the effect of white light, and can effectively save the internal installation volume and make the product smaller.

Description of the drawings

Figure 1 is an exploded view of the structure of the present invention.

FIG. 2 is a schematic diagram of the structure of the light emitting through hole on the laser connecting plate of the present invention.

Figure 3 is a cross-sectional view of the light emitting effect of the present invention.

Fig. 4 is a schematic diagram of the effective beam and the exit beam of the present invention.

Fig. 5 is a diagram of the light exiting light path of the present invention.

The best mode of the invention

As shown in Figures 1 and 2, an LD laser light source module that blocks blue light includes an LD light source 10, which emits blue light. A laser connection plate 12 is provided on the light exit channel of the LD light source 10, and the laser connection plate 12 is A light exit hole 1 is provided, wherein the size of the light exit hole 1 is smaller than the diameter of the light beam emitted by the LD light source 10 on the laser connection plate 12, and the light exit hole 1 is used to restrict the LD light source 10 from emitting light on the laser connection plate 12 The range of beam diameter.

As shown in Figures 3 and 4, the LD light source 10 emits light in a horn shape. When the LD light source is not restricted by the light exit hole 1, the diameter range of the light beam is X, and when the light exit hole 1 is provided to limit the light diameter range The light beam range of the LD light source is Y, where Y is less than or equal to X; the light farther from the center of the light beam is scattered or redundant blue light, which is of no use value. Therefore, in this embodiment, the light output channel is set on the LD light source 10 Through hole 1, light-emitting through hole 1 restricts the passage of scattered or excess blue light, thereby making the light-emitting effect of the LD light source better and the light more concentrated.

As shown in FIG. 2, the light exit hole 1 is a rectangular opening. In addition, the shape of the light exit hole 1 can be set into different shapes as required.

In this embodiment, the LD light source 10 is sealed around the side walls of the light-emitting channel, so that the light beam of the LD light source 10 can only be emitted from the light-emitting channel, thereby effectively preventing the light from the LD light source 10 from passing through the side wall and affecting the light output. effect. Therefore, sealing around the side wall of the light exit channel of the LD light source 10 can make the light beam more concentrated.

As shown in Figures 2 and 3, the light exit channel of the LD light source is sequentially provided with a first lens 9, a second lens 5 and a powder sheet 6, wherein the powder sheet 6 is coated with yellow phosphor, and the powder sheet 6 belongs to For non-transmissive lenses, the yellow phosphor coated on the powder sheet 6 is combined with the blue light to become white light, so that the light beam of the LD light source 10 is a white light beam. The powder sheet 6 and the LD light source 10 are arranged in parallel, and the main optical axis of the powder sheet 6 and the LD light source 10 are not on the same straight line. The first lens 9 and the second lens 5 are installed in the laser connecting plate 12, wherein the light beam from the LD light source 10 first passes through the first lens 9 to homogenize the light, and then is projected from the light exit hole 1 into the second lens 5. Do homogenization.

In this embodiment, if the light exit hole 1 is not provided to limit the range of the light beam of the LD beam, the light beam exceeding a certain range is difficult to be reflected on the powder sheet 6, that is, this part of the light beam does not interact with the yellow fluorescent light on the powder sheet 6. The powder combination causes the blue light beyond the range of the light beam to be directly projected to the outside, resulting in more scattered light beams and poor light output effect. In this technical solution, the light exit hole 1 is provided on the laser connection plate 12, and the light exit hole 1 limits the diameter range of the light beam, thereby preventing excess or scattered blue light from being projected to the outside.

As shown in Figures 1 and 5, this embodiment further includes a first diffuser 7, a second diffuser 3, a reflecting mirror 8 and a prism 4. Among them, the first lens 9, the light exit through hole 1, the reflecting mirror 8, the second A diffusion sheet 7, a prism 4, a second lens 5, a powder sheet 6 and a second diffusion sheet 3 are sequentially arranged on the light exit channel of the LD light source. The reflector 8 and the prism 4 are used to reflect the light beam of the LD light source 10 On the powder sheet 6, the first diffusion sheet 7 and the second diffusion sheet 3 are used for uniform light.

In this embodiment, the lens holder 11 is further included. The first diffuser 7, the reflector 8 and the prism 4 are installed in the lens holder 11, and the second diffuser 3 is arranged on the light-emitting surface of the lens holder 11. The lens holder 11 is provided with a horizontal groove for installing the first diffuser 7 and an inclined groove for installing the reflector 8. The inclined groove is inclined at 45 degrees with respect to the light exit path, so that the reflector 8 reflects light at 45 degrees.

In this embodiment, it further includes a powder sheet fixing plate 14, and the powder sheet 6 is installed on the powder sheet fixing plate 14.

In this embodiment, it also includes a laser welding board 16. The LD light source 10 is mounted on the laser welding board 16; the back of the laser welding board 16 is provided with a circuit board 18, the circuit board 18 is connected to a power source, and the LD light source 10 passes through The laser welding board 16 is electrically connected with the circuit board 18 to realize the circuit connection.

In this embodiment, two pins of the LD light source 10 are provided with insulating sleeves 15. Since the pins of the LD light source 10 are bare wires, the insulating sleeve 15 can prevent short circuits, prevent static electricity, and provide insulation protection. Among them, the insulating sleeve can be installed on the pin of the LD light source 10 by a production tool such as a hot blower.

In this embodiment, it further includes a cover plate 2, which is arranged on the light-emitting surface of the lens holder 11 to protect the lens holder 11 and the second diffuser 3. The cover plate 2 has a ring structure with an inner The ring is hollowed out for light.

Claims

An LD laser light source module for blocking blue light, which is characterized in that it includes an LD light source, the light emitted by the LD light source is blue light, a laser connecting plate is provided on the light exit channel of the LD light source, and a light exit hole is provided on the laser connecting plate. The size of the light exit hole is smaller than the diameter of the light beam of the LD light source on the laser connection plate, and the light exit hole is used to limit the range of the beam diameter of the LD light source on the laser connection plate.
The LD laser light source module for blocking blue light according to claim 1, wherein the side walls of the light exit channel of the LD light source are sealed around so that the light beam of the LD light source can only be emitted from the light exit channel.
The LD laser light source module for blocking blue light according to claim 1, wherein the light exit channel of the LD light source is provided with a reflective component and a powder sheet, the powder sheet is coated with yellow phosphor, and the reflective The component is used to reflect the light beam emitted by the LD light source onto the powder sheet, and the yellow phosphor on the powder sheet is combined with the light beam emitted by the LD light source to become white light, and then the white light is reflected by the powder sheet; wherein, the reflective component and the powder sheet design After the light exit hole.
The LD laser light source module for blocking blue light according to claim 1, wherein a lens assembly for uniform light is provided on the light exit channel of the LD light source.
The LD laser light source module for blocking blue light according to claim 1, wherein the light exit channel of the LD light source is provided with a diffuser assembly for assisting light extraction and uniform light.
The LD laser light source module for blocking blue light according to claim 1, wherein the light exit channel of the LD light source is provided with a lens assembly, a diffusion sheet assembly, a reflection assembly and a powder sheet, wherein the lens The component and the diffuser component are used to assist the LD light source to emit light, and to improve the uniformity and concentration of the light; the powder sheet is coated with yellow phosphor, and the reflecting component is used to reflect the light beam emitted by the LD light source onto the powder sheet. Combined with the light beam of the LD light source, it becomes white light, which is then reflected by the powder sheet.
The LD laser light source module for blocking blue light according to claim 6, wherein the lens assembly includes a first lens and a second lens, and the diffuser assembly includes a first diffuser and a second diffuser. , The reflective component includes a reflective mirror and a prism; wherein the first lens, the reflective mirror, the first diffusion sheet, the prism, the second lens, the powder sheet, and the second diffusion sheet are sequentially arranged on the light exit channel of the LD light source. The mirror is used to reflect the light beam of the LD light source onto the prism, and the prism is used to reflect the light beam on the powder sheet. When the powder sheet reflects the light beam, the light beam passes through the second lens again for homogenization.
The LD laser light source module for blocking blue light according to claim 3 or 6, wherein the reflecting component comprises a reflecting mirror and a prism; the reflecting mirror is used to reflect the light beam of the LD light source onto the prism The prism is used to reflect the light beam on the powder sheet.
The LD laser light source module for blocking blue light according to claim 4 or 6, wherein the lens assembly comprises a first lens and a second lens, and the first lens is arranged in the laser connecting plate, and It is located on the light exit channel between the LD light source and the light exit hole; the second lens is arranged in the laser connecting plate and is located on the light exit channel after the light exit hole; wherein the light beam of the LD light source first passes through the first lens evenly The light is then projected from the light-emitting through hole into the second lens for homogenization.
The LD laser light source module for blocking blue light according to claim 5 or 6, wherein the diffuser sheet assembly includes a first diffuser sheet and a second diffuser sheet, and the first diffuser sheet is arranged at the light emitting channel. On the light exit channel between the hole and the laser connection plate, the second diffuser is arranged on the light exit channel behind the laser connection plate.
The LD laser light source module for blocking blue light according to claim 3 or 7, wherein the powder sheet and the LD light source are arranged in parallel, and the main optical axis of the powder sheet and the LD light source are not on the same straight line.
The LD laser light source module for blocking blue light according to claim 7, further comprising a lens holder, the lens holder is arranged on the light-emitting surface of the laser connecting plate, and the diffuser sheet assembly and the reflective assembly are installed on In the lens holder, the lens holder is provided with a horizontal groove for installing the first diffuser and an inclined groove for installing the reflector.
The LD laser light source module for blocking blue light according to claim 3 or 6, further comprising a powder sheet fixing plate, and the powder sheet is mounted on the powder sheet fixing plate.
The LD laser light source module for blocking blue light according to claim 1, further comprising a laser welding board, the LD light source is installed on the laser welding board; the back of the laser welding board is provided with a circuit board , The circuit board is connected to the power supply, and the LD light source is electrically connected to the circuit board through the laser welding board to realize the circuit connection.