CN110185948A - A kind of LD laser light source mould group for keeping off blue light - Google Patents

Abstract

The invention relates to the technical field of lighting devices, and discloses an LD laser light source module that blocks blue light, including an LD light source, the light emitted by the LD light source is blue light, and a laser connection plate is provided on the light output channel of the LD light source, and the laser connection plate A light exit hole is provided, wherein the size of the light exit hole is smaller than the diameter of the light beam emitted by the LD light source on the laser connection plate, and the light exit through hole is used to limit the beam diameter range of the light output by the LD light source on the laser connection plate. Compared with the prior art, the present invention limits the diameter range of the light beam of the LD light source by setting a light through-hole on the laser connection plate, avoiding redundant or scattered blue light from passing through the light-out through hole, so that the light beam is more concentrated and the light-out effect is better. Good beneficial effect.

Description

A LD laser light source module that blocks blue light

technical field

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

Background technique

The English full name of LD is Laser diode, and the Chinese name is laser semiconductor, also known as laser diode. A laser is a device that amplifies light by inducing emission. Existing laser semiconductors are generally used in optical fiber communications, optical discs, laser printers, laser scanners, laser pointers (laser pointers) and other fields, while in the field of lighting, light source modules generally use LEDs as light-emitting media. 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 light. At the same time, as shown in Figure 4, the range value X of the light emitted by each type of LD semiconductor laser diode is determined, and the light is emitted from the center to the surrounding. , is the same shape as a trumpet. The blue light range value Y that can be used by the light source module is variable and also a controllable value, but Y must be less than or equal to X (ie: Y≦X) in order to obtain the qualified blue light required by the product. Excess blue light or scattered blue light is of no use to 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.

Contents of the invention

The present invention aims at overcoming at least one defect of the above-mentioned prior art, and provides a blue-light LD laser light source light film, which is used to solve the lack of technology in the current flashlight industry that uses LD light source as a light-emitting medium, and the problem of LD light source modules. There is a technical problem that the light output port is affected by blue light, and the light output effect is not ideal.

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

In this technical solution, the LD light source emits light in the shape of a trumpet, and the emitted light is blue light. Among them, the light that is farther away from the center of the light beam belongs to scattered or redundant blue light, which has no use value. Therefore, this technical solution is adopted in the LD light source. A light outlet hole is set on the light outlet channel, and the light outlet hole is used to limit the passage of scattered or redundant blue light, so that the light output effect of the LD light source is better and the light is more concentrated.

In the technical solution, the shape of the light exit hole can be set as required. Among them, the size of the light exit hole is smaller than the diameter of the light beam emitted by the original LD light source on the same plane, and the shape of the light exit hole can be set as a rectangle, square, circle, ellipse, rhombus, star, curved surface shape or irregular shape Wait.

The light source module of this technical solution uses LD laser diodes as the light source. The luminous power of LD laser diodes is high, and the brightness of one 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, the LD light source has higher color brightness, longer irradiation distance and higher definition; and the light emitted by the LD light source has better wavelength characteristics, directional alignment characteristics and phase characteristics, which greatly improves the light output. distance, brightness and clarity.

On the other hand, as a new technical solution, the LD laser light source module composed of LD laser diodes only uses a single-chip LD laser diode as the light-emitting medium, so the LD laser light source module produced 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 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, thereby effectively preventing the light emitting light of the LD light source from passing through the side walls and affecting 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 exit beam more concentrated.

Further, the light exit channel of the LD light source is provided with a reflection component and a powder sheet, and the powder sheet is coated with yellow fluorescent powder. The reflection component is used to reflect the light beam emitted by the LD light source on the powder sheet, and the yellow fluorescence on 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 reflective component and the powder sheet are arranged behind the light exit 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 makes the light beam of the LD light source a white light beam. Since the powder sheet is a non-light-transmitting lens, this technical solution reflects the light beam of the LD light source on the powder sheet through the reflective component, and then reflects the white light through the powder sheet.

In this technical solution, if there is no light exit hole to limit the range of the light output beam of the LD beam, it is difficult for the light beam beyond a certain range of light 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 world, resulting in more scattered light beams and poor light output effect. In the technical solution, since the light-emitting through hole is provided on the laser connection plate, the light-emitting through hole limits the diameter range of the light beam, thereby preventing redundant 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 assisting light exit and uniform light.

Further, the light output channel of the LD light source is provided with a lens assembly, a diffuser assembly, a reflective assembly and a powder sheet, wherein the lens assembly and the diffuser assembly are used to assist the LD light source to emit light and improve the uniformity and concentration of the light output 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 on the powder sheet. The combination of the yellow phosphor powder and the light beam of the LD light source becomes white light, which is 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 mirror and a prism; wherein the first lens, the 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, and the reflector is used to reflect the light beam of the LD light source on the prism, and the prism is used for The light beam is reflected on the powder sheet, and when the powder sheet reflects the light beam, the light beam passes through the second lens for uniform light again.

In this technical solution, the light emitted by the LD light source is first projected onto the first lens for homogenization, and then projected onto the reflector through the first lens for reflection. The incident angle of the reflector is equal to the exit angle; the reflected light beam is first projected on on the first diffusion sheet to improve the uniformity of the light output, and then projected on 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 an angle of 90 degrees, and through the prism reflection, the direction of the light path is changed. The powder sheet is coated with yellow phosphor as a yellow light reflector. Since the light emitted by the LD light source is blue, and when the blue light is projected on the powder sheet, it will interact with the yellow phosphor to become white light. Since the powder is a non-transparent lens, after the blue light beam is projected on the powder and becomes white light, it will be reflected by the powder again. The second lens and the second diffusing sheet are successively arranged on the light exit channel of the white light, which are used to further homogenize the light beam, transmit the light beam evenly, and play the role of adjusting the light beam and protecting the lens. The white light beam passes through the second lens and the second light beam in sequence. After two diffusers projected out.

Further, the powder sheet is arranged parallel to the LD light source, and the principal optical axes 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 the reflected light from the powder sheet; this arrangement also effectively saves space, allowing the light beam to reflect light in an effective space.

Further, the first lens and the second lens are installed on the laser connection board, wherein the output beam of the LD light source first passes through the first lens for uniform light, and then projects out from the light exit hole and enters the second lens for uniform light.

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

In this technical solution, the inclination angle of the reflector is 45°±0.15°, after the light beam is projected on the reflector, it shoots out of the prism in a vertical downward direction, and the prism then reversely reflects the light beam on the powder sheet at an angle of 90 degrees . 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 arranged at a 45-degree inclination relative to the light-emitting optical path, so that the reflector reflects the 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 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, Realize circuit connection.

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

Further, it also includes a cover plate, the cover plate is set on the light-emitting surface of the lens holder to protect the lens holder and the second diffuser, the cover plate has a ring-shaped structure, and the inner ring is hollowed out for light-emitting.

Further, insulating sleeves are provided on the two pins of the LD light source. Since the pins of the LD light source are bare wires, the insulation cover can play the role of preventing short circuit, anti-static and insulation protection. Wherein, the insulating sleeve can be installed on the pins of the LD light source through production tools such as a hot blower.

Compared with prior art, the beneficial effect of the present invention is:

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

(2) The LD laser light source module of this technical solution uses an LD laser diode as a light-emitting medium. Compared with the light source module in which an LED light source is used as a light-emitting medium in the prior art, a new light source module design scheme is provided to provide people with Providing more light source module options not only expands the design field of light emitting modules, but also meets people's needs.

(3) Compared with LED light-emitting diodes, LD laser diodes have better wavelength characteristics, directional alignment 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 meets the brightness requirements at the same time.

(5) The LD laser light source module adopts the technical scheme that the LD light source and the powder sheet are arranged in parallel, which can not only effectively achieve the effect of white light, but also effectively save the internal installation volume and make the product smaller.

Description of 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 exit hole on the laser connection board of the present invention.

Fig. 3 is a cross-sectional view of the light extraction effect of the present invention.

FIG. 4 is a schematic diagram of the effective light beam and the outgoing light beam of the present invention.

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

Detailed ways

The accompanying drawings of the present invention are only for illustrative purposes, and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some components in the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, some known structures and their descriptions in the drawings may be omitted. understandable.

Example 1

As shown in Figures 1 and 2, an LD laser light source module that blocks blue light includes an LD light source 10 that emits blue light. A laser connection plate 12 is provided on the light output channel of the LD light source 10, and a laser connection plate 12 is placed on the laser connection plate 12. A light exit through hole 1 is provided, wherein the size of the light exit through hole 1 is smaller than the diameter of the light beam of the LD light source 10 on the laser connection plate 12, and the light exit through hole 1 is used to limit the light output of the LD light source 10 on the laser connection plate 12 range of beam diameters.

As shown in Figure 3 and Figure 4, wherein the LD light source 10 emits light in the shape of a horn, the diameter range of the light beam of the LD light source without the limitation of the light output through hole 1 is X, and when the light output through hole 1 is set to limit the light output diameter range The range of the outgoing light beam is Y, wherein Y is less than or equal to X; the light farther away from the center of the outgoing light beam is scattered or redundant blue light, which has no value in use. Through hole 1, the light output through hole 1 limits the passage of scattered or redundant blue light, thereby making the LD light source have a better light output effect and more concentrated light.

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 in different shapes as required.

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

As shown in Figures 2 and 3, a first lens 9, a second lens 5, and a powder sheet 6 are sequentially provided on the light exit channel of the LD light source, wherein the powder sheet 6 is coated with yellow phosphor, and the powder sheet 6 belongs to In the non-light-transmitting lens, the yellow fluorescent powder coated on the powder sheet 6 is combined with blue light to become white light, thereby making the light beam of the LD light source 10 a white light beam. The powder sheet 6 is arranged parallel to the LD light source 10 , and the principal optical axes 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 connection plate 12, wherein the light beam of the LD light source 10 first passes through the first lens 9 for uniform light, and then projects out from the light exit hole 1 and enters the second lens 5 Homogenize.

In this embodiment, if the light exit hole 1 is not provided to limit the range of the light exit beam of the LD light beam, it is difficult to reflect the light beam beyond a certain range of light 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 blue light beyond the light beam range is directly projected to the outside world, resulting in more scattered light beams and poor light output effect. In this technical solution, since the light-emitting through hole 1 is provided on the laser connection plate 12, the light-emitting through hole 1 limits the diameter range of the light beam, thereby avoiding redundant or scattered blue light from being projected to the outside.

As shown in Figure 1 and Figure 5, this embodiment also includes a first diffusion sheet 7, a second diffusion sheet 3, a reflector 8 and a prism 4, wherein the first lens 9, the light exit hole 1, the reflector 8, the first A diffuser 7, a prism 4, a second lens 5, a powder sheet 6 and a second diffuser 3 are sequentially arranged on the light exit channel of the LD light source, and 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, a lens holder 11 is also 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, so 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 relative to the light-emitting optical path, so that the reflector 8 reflects the light at 45 degrees.

In this embodiment, a powder sheet fixing plate 14 is also included, and the powder sheet 6 is installed on the powder sheet fixing plate 14 .

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

In this embodiment, insulating sleeves 15 are provided on the two pins of the LD light source 10 . Since the pins of the LD light source 10 are bare wires, the insulating sheath 15 can play the role of preventing short circuit, anti-static and insulating protection. Wherein, the insulating sleeve can be installed on the pins of the LD light source 10 through production tools such as a hot blower.

In this embodiment, a cover plate 2 is also included. The cover plate 2 is covered 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-shaped structure, and the inner The ring is hollowed out for light.

Apparently, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solution of the present invention, rather than limiting the specific implementation manner of the present invention. Any modification, equivalent replacement and improvement made within the spirit and principle of the claims of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (14)

1. A LD laser light source module for blocking blue light, characterized in that it comprises an LD light source, the light emitted by the LD light source is blue light, a laser connection plate is provided on the light exit channel of the LD light source, and a light exit through hole is provided on the laser connection plate , wherein the size of the light-emitting through hole is smaller than the diameter of the light-emitting beam of the LD light source on the laser connection plate, and the light-emitting through hole is used to limit the diameter range of the beam of light emitted by the LD light source on the laser connection plate. 2. An 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 so that the light beam of the LD light source can only be emitted from the light exit channel. 3. A kind of LD laser light source module that blocks blue light according to claim 1, it is characterized in that, the light exit channel of described LD light source is provided with reflection component and powder sheet, is coated with yellow fluorescent powder on the powder sheet, so The reflective component is used to reflect the light beam emitted by the LD light source on the powder sheet, the yellow phosphor on the powder sheet combines with the light beam emitted by the LD light source to become white light, and then reflects the white light through the powder sheet; wherein, the reflective component and the powder The sheet is arranged behind the light exit hole. 4. 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. 5 . The LD laser light source module for blocking blue light according to claim 1 , characterized in that, the light exit channel of the LD light source is provided with a diffuser assembly for assisting light exit and uniform light. 6 . 6. The LD laser light source module for blocking blue light according to claim 1, wherein a lens assembly, a diffuser assembly, a reflective assembly, and a powder sheet are arranged on the light exit channel of the LD light source, wherein the The above-mentioned lens assembly and diffuser assembly are used to assist the LD light source to emit light and improve the uniformity and concentration of the light; the powder sheet is coated with yellow phosphor, and the reflective assembly is used to reflect the light beam emitted by the LD light source on the powder sheet. The beam of phosphor powder and LD light source combines to become white light, which is then reflected by the powder sheet. 7. 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 diffusion sheet assembly includes a first diffusion sheet and a second lens assembly. Diffusion sheet, the reflection assembly includes a reflector and a prism; wherein the first lens, the reflector, the first diffuser, the prism, the second lens, the powder sheet and the second diffuser are sequentially arranged on the light exit channel of the LD light source, so The reflector is used to reflect the light beam of the LD light source on 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 uniform light. 8. A blue-light blocking LD laser light source module according to claim 3 or 6, wherein the reflective assembly includes a reflector and a prism; the reflector is used to reflect the light beam of the LD light source on the On the prism, the prism is used to reflect the light beam on the powder sheet. 9. The LD laser light source module for blocking blue light according to claim 4 or 6, wherein the lens assembly includes a first lens and a second lens, and the first lens is arranged in the laser connecting plate , and 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 behind the light exit hole; wherein, the light beam of the LD light source first passes through the first The light is uniformed by the lens, and then projected from the light exit hole into the second lens for uniform light. 10. The LD laser light source module for blocking blue light according to claim 5 or 6, wherein the diffuser assembly includes a first diffuser and a second diffuser, and the first diffuser is arranged on On the light exit channel between the light exit through hole and the laser connection plate, the second diffusion sheet is arranged on the light exit channel behind the laser connection plate. 11. An LD laser light source module for blocking blue light according to claim 3 or 7, characterized in that the powder sheet and the LD light source are arranged in parallel, and the principal optical axes of the powder sheet and the LD light source are not on the same straight line . 12. 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 assembly and the reflection assembly Installed in the lens holder, the lens holder is provided with a horizontal groove for installing the first diffusion sheet and an inclined groove for installing the reflector. 13. 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. 14. The LD laser light source module for blocking blue light according to claim 1, further comprising a laser welding plate, the LD light source is mounted on the laser welding plate; the back side of the laser welding plate is provided with The circuit board is connected to the power supply, and the LD light source is electrically connected to the circuit board through laser welding to realize circuit connection.