WO2017118300A1

WO2017118300A1 - Light source device and illumination device

Info

Publication number: WO2017118300A1
Application number: PCT/CN2016/111694
Authority: WO
Inventors: 胡飞; 郭祖强; 李屹
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2016-01-07
Filing date: 2016-12-23
Publication date: 2017-07-13
Also published as: CN106950785A; CN106950785B

Abstract

A light source device (100) comprises a laser light source (101) and a light-splitting device (105) located on a light path of laser light rays. The light-splitting device (105) transmits part of laser light rays to form first laser light rays, and reflects parts of laser light rays to form second laser light rays. A wavelength conversion device (109) is located on a first light path, receives the first laser light rays, converts at least part of the first laser light rays into light rays having different wavelengths and reflects the light rays having different wavelengths to the light-splitting device (105). A scattering and reflection device (107) is located on a second light path, converts the second laser light rays into second light rays having different light distributions and reflects the second light rays having different light distributions to the light-splitting device (105). The light-splitting device (105) partially reflects the first light rays and partially transmits the second light rays, and the first light rays reflected by the light-splitting device (105) and the second light rays transmitted by the light-splitting device (105) are combined to one beam and is emitted. In this way, the light-splitting device (105) can emit the first light rays and the second light rays in any region on a light exit path, and the negative effects of uniformity of emergent light rays due to selective transmission of laser light rays and laser-excited light rays in the light-splitting device (105) in the prior art are avoided, thereby improving the uniformity of emergent light rays of the light source.

Description

Light source device and lighting device

Technical field

The present invention relates to the field of illumination, and in particular to a light source device and a lighting device.

Background technique

At present, a large number of white light sources are used in the field of illumination and projection display. Commonly used white light sources include LEDs and UHP bulbs, which provide uniform white light beams for use in stage lighting, theater lights, searchlights, etc., as well as LCD, LCOS and DMD represents the field of projectors. For LED light source, it has good reliability and color performance, but it is limited by the large amount of optical expansion. The beam used in the illumination field is relatively divergent, and the brightness is limited in the projection field. For the bulb source, The required optical effect can be achieved, but the bottleneck is the life problem. The life of the bulb source is generally only a few hundred to one thousand or two thousand hours, which greatly limits the promotion of its application. With the development of technology, the use of semiconductor lasers as excitation sources to excite phosphors as a light source is gradually replacing traditional illumination sources.

technical problem

However, in practical applications, when the laser and the laser-excited fluorescence are combined, a problem of uniformity of light is often generated, resulting in uneven color distribution of the emitted light.

Technical solution

In view of the defects of the prior art light source having poor color uniformity, the present invention provides a light source device with good uniformity and high brightness:

The invention comprises a laser light source for emitting laser light, comprising a light splitting device, located on the laser light path, the light splitting device transmitting part of the laser light to form the first laser light, and reflecting part of the laser light to form the second laser light, wherein the light path of the first laser light is the first light path, the first light path The optical path of the second laser is a second optical path; and the wavelength conversion device is disposed on the first optical path for receiving the first laser and converting at least part of the first laser into light of different wavelengths to form a first light output, the wavelength The converting device reflects the first light back to the beam splitting device, the beam splitting device partially reflects the first light; and comprises a diffuse reflecting device located on the second light path for converting the second laser light into the second light of different light distribution, and The second light is reflected back to the light splitting device, and the light splitting device partially transmits the second light; the first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into a single beam.

Preferably, the optical shaping device is disposed on the laser light path between the laser light source and the light splitting device, and the light shaping device sequentially includes a convex lens, a concave lens and a diffusion sheet in the laser light path direction.

Preferably, the spectroscopic device comprises two or more transparent sheets arranged in a stack.

Preferably, there is an air gap between the transparent sheet and the transparent sheet.

Preferably, the spectroscopic device comprises a first transparent sheet, wherein the first transparent sheet is a transparent sheet closest to the wavelength conversion device in each transparent sheet, and the spectroscopic device further comprises a filter film, the filter film is located on the first transparent sheet near the wavelength conversion device On the surface, the filter film transmits the laser light and reflects the first light.

Preferably, the light splitting device comprises a second transparent sheet, wherein the second transparent sheet is a transparent sheet farthest from the wavelength conversion device in each transparent sheet, and the light splitting device further comprises an antireflection film, the antireflection film is located at the second transparent sheet away from the wavelength conversion On the surface of the device.

Preferably, the light splitting means comprises a first region partially transmitting the laser light and partially reflecting the laser light, and a second region reflecting the first light and transmitting the second light.

Preferably, the wavelength conversion device comprises a stationary phosphor sheet or a rotatable fluorescent color wheel.

The invention also provides a light source device, comprising a laser light source for emitting laser light, comprising a light splitting device, located on the laser light path, the light splitting device reflecting part of the laser light to form the first laser light, and transmitting part of the laser light to form the second laser light, first The optical path where the laser is located is the first optical path, and the optical path where the second laser is located is the second optical path; and the wavelength conversion device is disposed on the first optical path for receiving the first laser and converting at least part of the first laser to different wavelengths After the light, a first light exit is formed, the wavelength conversion device reflects the first light back to the light splitting device, and the light splitting device partially transmits the first light; and the diffuse reflection device is disposed on the second optical path for converting the second laser into a different The second light of the light distribution reflects the second light back to the spectroscopic device, and the spectroscopic device partially reflects the second light; the first light transmitted by the spectroscopic device and the second light reflected by the spectroscopic device are combined into a single beam.

Preferably, the light splitting means comprises a first region partially transmitting the laser light and partially reflecting the laser light, and a second region transmitting the first light and reflecting the second light.

The present invention also provides a lighting device comprising the light source device of any of the above.

Beneficial effect

Compared with the prior art, the present invention includes the following beneficial effects:

By providing a spectroscopic device capable of transmitting a portion of the laser light and reflecting a portion of the laser light on the laser light path, the laser light is respectively guided to be incident on the wavelength conversion device and the scattering reflection device, and converted into the first light and the second light, respectively. The device combines the first light and the second light to emit light, so that the light splitting device can emit both the first light and the second light in any area on the outgoing light path, thereby avoiding the laser and the laser receiving device in the prior art. The selective permeability has an adverse effect on the uniformity of the final emitted light, thereby improving the uniformity of light emission from the light source.

DRAWINGS

1 is a schematic structural view of a light source device according to Embodiment 1 of the present invention;

2 is a schematic structural view of a light splitting device of a light source device according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention;

4 is a schematic structural view of a light splitting device of a light source device according to Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

A specific embodiment of the present invention provides a light source device with good uniformity and high brightness: a laser light source for emitting laser light, including a light splitting device, located on a laser light path, the light splitting device transmitting a partial laser to form a first laser And reflecting part of the laser to form a second laser, the optical path where the first laser is located is the first optical path, and the optical path where the second laser is located is the second optical path; and the wavelength conversion device is disposed on the first optical path for receiving the first laser. After converting at least part of the first laser light into light of different wavelengths, forming a first light exit, the wavelength conversion device reflects the first light back to the beam splitting device, and the light splitting device partially reflects the first light; and the scattering reflecting device is located at the second On the optical path, the second light for converting the second laser light into different light distributions, and reflecting the second light back to the light splitting device, the light splitting device partially transmitting the second light; the first light and the light splitting device reflected by the light splitting device The transmitted second light is combined into a single beam.

Different from some prior art spectroscopic devices, the region of the spectroscopic device of the present invention that can transmit both laser light and reflect laser light does not distinguish between the transmitted laser and the reflected laser by providing two different sub-regions in the portion, that is, This region achieves the effects of transmission and reflection through the same region of the same structure, and the spectral characteristics of the first laser and the second laser are also substantially the same (herein "the same substrate" means the same within the detection error range). Therefore, the spectroscopic device can emit light having the same spectrum as the laser light emitted from the laser light source in any region on the outgoing light path. However, in the prior art spectroscopic device, there are always some areas where the laser light cannot be emitted, which causes an uneven color region in the cross section of the entire outgoing light, which has a great adverse effect on the image display.

Therefore, the present invention utilizes the special design of the spectroscopic device, which does not utilize the wavelength selective characteristic to split the light, nor does it use the region selection characteristic to geometrically split the light, so that part of the laser light is transmitted and part of the laser light is reflected, and finally the uniform light output effect is achieved. All the technical solutions of the present invention are implemented under the inventive concept.

The embodiments of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

Embodiment 1

Please refer to FIG. 1. FIG. 1 is a schematic structural view of a first embodiment of the present invention. As shown, the light source device 100 includes a laser light source 101, a beam splitting device 105, a wavelength converting device 109, and a scattering reflecting device 107. The laser light source 101 is used to emit laser light, the light splitting device 105 is located on the laser light path, the light splitting device 105 transmits part of the laser light to form a first laser light, and reflects part of the laser light to form a second laser light. The optical path where the first laser light is located is the first light path, and the second The optical path where the laser is located is the second optical path. The wavelength conversion device 109 is located on the first optical path, and after receiving the first laser light, converting at least a portion of the first laser light into light of different wavelengths to form a first light exit, and the scattering and reflecting device 107 is located on the second optical path for The two lasers are converted into second light of different light distributions. The wavelength conversion device 109 and the scattering reflection device 107 respectively reflect the first light and the second light to the beam splitting device, and the light splitting device 105 partially reflects the first light and partially transmits the second light, and the first light and the split light reflected by the light splitting device 105 The second light transmitted by device 105 is combined into a single beam.

In this embodiment, the laser light source 101 may be a laser light source, a laser diode light source, or a light source composed of a laser diode array, and any of the laser light sources used in the prior art may be used as the laser light source of the present invention.

In this embodiment, the wavelength conversion device 109 is a reflective wavelength conversion device, that is, includes a wavelength conversion layer and a reflective layer, wherein the reflective layer is located on a surface of the wavelength conversion layer away from the light splitting device. The wavelength conversion layer of the wavelength conversion device 109 absorbs the first laser light and converts the first laser light into a laser light different from the first laser wavelength, and the laser light and the unabsorbed first laser light are reflected by the reflective layer to form the first light. Exit (Of course, the invention also includes the case where the first laser is completely absorbed and converted into a laser). The wavelength conversion layer includes a phosphor, a phosphorescent material, and a quantum dot luminescent material. In this embodiment, the laser light source is a blue light source, and the wavelength conversion device includes a yellow phosphor (such as a YAG phosphor). Of course, in other embodiments of the present invention, laser light sources of other wavelength ranges and wavelength conversion devices of other light-emitting characteristics may be used, and are not limited to the technical solutions of the above specific embodiments.

In the present embodiment, the scattering reflection device 107 changes the light distribution of the incident laser light, converts the Gaussian distribution laser light into the Lambertian distribution light, thereby improving the uniformity of the light and preventing the light from being generated after the emission. The scattering reflection device 107 includes a scattering material layer including one or more of aluminum oxide, titanium oxide, barium sulfate, cerium oxide, zirconium oxide, and zinc oxide. Alternatively, the scattering material layer may also be Includes materials such as glass powder for bonding. The scattering material layer in this embodiment is a scattering and reflecting effect on the second laser light by using scattering particles close to the laser wavelength. In other embodiments of the present invention, the diffuse reflection device 107 may also use a scattering surface having a rugged surface. In order to enhance the reflection performance of the scattering and reflecting device 107, a technical solution in which the scattering reflection layer and the specular reflection layer are combined may be selected, and details are not described herein again.

In the present embodiment, the wavelength conversion device 109 may be a fixed phosphor sheet or a rotatable fluorescent color wheel driven by a driving device such as a motor. The diffuse reflection means 107 may also be a stationary diffuser or a rotatable diffuser, respectively.

In this embodiment, the laser light source 101 emits a blue laser light, and the partial transmission spectroscopic device portion is reflected by the spectroscopic device 105. The transmitted first blue laser light is converted into yellow light by the wavelength conversion device 109 and returned to the spectroscopic device 105, and the reflected second blue laser light is returned. The second light returning spectroscopic device 105 is formed by being reflected by the scattering reflection device 107. Finally, the yellow light reflected by the spectroscopic device 105 and the second photo blue light transmitted through the spectroscopic device 105 are combined to become white light.

In this embodiment, a light shaping device is further disposed on the laser light path between the laser light source 101 and the light splitting device 105. The light shaping device includes a convex lens 102, a concave lens 103 and a diffusion sheet 104 in this order along the laser light path direction. The convex lens 102 converges the laser beam emitted from the laser light source 101, and is collimated by the concave lens 103 to obtain a light beam whose beam cross-sectional area is compressed and reduced. The compressed collimated light beam is homogenized by the diffusion sheet 104. Since the scattering characteristic of the diffusion sheet 104 is rotationally symmetrical, the light spot incident on the wavelength conversion device 109 and the scattering reflection device 107 is approximately circular. Through the light shaping device, a circular spot having a small divergence angle, uniform brightness, and high brightness is obtained.

In this embodiment, further comprising a first focusing lens 108 between the beam splitting device 105 and the wavelength converting device 109, the first focusing lens 108 further reduces the spot area incident on the wavelength converting device 109, and the small spot is The optical spread amount of the light generated by the wavelength conversion device 109 is small, so that the divergence angle of the final emitted light is small, and the present invention can satisfy the demand for the beam illumination lamp in the case where the beam divergence angle of the beam illumination lamp is required to be small and the light energy is concentrated. . Further, a second focusing lens 106 is disposed between the beam splitting device 105 and the diffuse reflecting device 107. The second focusing lens 106 further reduces the spot area incident on the diffuse reflecting device 107, and the small spot is on the diffuse reflecting device 107. The optical spread of the generated light is small, so that the divergence angle of the final emitted light is small, and the present invention can satisfy the demand for the beam illumination lamp in the case where the beam divergence angle of the beam illumination lamp is required to be small and the light energy is concentrated.

In this embodiment, since there is a case where the first laser light cannot be completely absorbed by the wavelength conversion device 109, the first light may include both the received laser light and the first laser light, and the first light is reflected back to the optical splitting device by the wavelength conversion device 109. At 105 o'clock, the first laser in the first light will again produce a phenomenon of partial transmission partial reflection, which will lose part of the first laser. Since the first laser that is not absorbed by itself is small, it does not have a large influence on the outgoing light. Similarly, when the second laser light is converted by the scattering reflection device 107 into the second light of the different light distribution and reflected back to the beam splitting device 105, the second light also partially reflects the phenomenon of partial transmission. In practical applications, the proportion of blue light required for white light is less than that of yellow light. When the spectroscopic device 105 is initially split, about 85% of the light is transmitted to form the first laser, and 15% of the light is reflected to form the second laser. In a rough model that does not consider light loss, 15% of the second laser is reflected by the diffuse reflection device 107 and then incident on the spectroscopic device 105 again, 85% of which is transmitted, then the lost light only accounts for 2.25% of the original laser source. The light loss has no obvious disadvantage compared to the prior art technical solution for digging holes in the beam splitter. Since the light splitting means 105 is uniform as a whole, the first light and the transmitted second light reflected by the light splitting means 105 are each distributed uniformly, and the combined light is also uniform in color.

In this embodiment, the spectroscopic device includes two or more transparent sheets stacked in a stack. Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of the spectroscopic device 105 of the present embodiment. The spectroscopic device 105 of Fig. 2 includes two transparent sheets 1051 and 1052. When the laser is incident on the transparent sheet, reflection and refraction occur simultaneously on each surface of the transparent sheet, that is, the transmittance of the transparent sheet to the laser is not 100%. This splitting is not realized by the difference in wavelength characteristics of the beam, nor is it It is realized by different transmissions (for example, setting a hollowed out area) in different regions of the spectroscopic device. The light that is finally transmitted through the two transparent sheets is the first laser, and the light that is finally reflected is the second laser.

The invention utilizes two or more transparent sheets arranged in a stack, that is, a superposition of the function of partially reflecting light by the transparent sheet, and correspondingly, in the case where the material of the transparent sheet is unchanged, the more the number of transparent sheets is reflected The more light there is, the smaller the ratio of the luminous flux of the first laser to the second laser. In this way, the ratio of the first laser to the second laser can be simply adjusted.

In this embodiment, an air gap is formed between the transparent sheet 1051 and the transparent sheet 1052. This air gap causes the light to be reflected and refracted due to the difference in refractive index between the front and back of the interface when the light is emitted from the transparent sheet 1052 and the light is incident on the 1051. If the transparent sheet 1051 and the transparent sheet 1052 are directly attached, the light may be directly transmitted through the transparent sheet 1052 when entering the 1051, and no reflection or refraction occurs. At this time, the transparent sheet 1051 and the transparent sheet 1052 are equivalent to one transparent sheet. This will result in a significant reduction in the transflective function of the spectroscopic device 105. In some cases, the present invention can also utilize only one transparent sheet as the spectroscopic device, which will require a material and an internal structure of the transparent sheet, since it is difficult to obtain a spectroscopic device having a proper transflective ratio by a single transparent sheet. The specific technology is not within the scope of the present invention, and the technical solution of utilizing the technical solution of the material and the internal structure and the plurality of transparent sheets of the embodiment is two different sub-technical solutions. All can be included in the inventive concept of the present invention.

In this embodiment, as shown in FIG. 2, the spectroscopic device 105 further includes a filter film 1053 and an anti-reflection film 1054. The filter film 1053 is located on the surface of the first transparent sheet 1051. The first transparent sheet 1051 is the transparent sheet closest to the wavelength conversion device 109 in each transparent sheet, and the filter film 1053 is located near the wavelength conversion of the first transparent sheet 1051. On the surface of the device 109; the anti-reflection film 1054 is located on the surface of the second transparent sheet 1052, the second transparent sheet 1052 is the transparent sheet farthest from the wavelength conversion device 109 in each transparent sheet, and the anti-reflection film 1054 is located on the second transparent sheet. It is away from the surface of the wavelength conversion device 109.

In this embodiment, the filter film 1053 is capable of transmitting laser light such that the first laser light is incident on the wavelength conversion device 109 via the spectroscopic device, and at the same time, the filter film 1053 is also capable of reflecting the first light emitted by the wavelength conversion device 109 and guiding it. To the exit light path.

In the present embodiment, the anti-reflection film 1054 enhances the transmission performance of the laser light, and the laser transmission reflectance of the spectroscopic device 105 is adjusted so that the ratio of the first light and the second light in the emitted light is controllable. In the present invention, the addition of the anti-reflection film 1054 is a preferred embodiment, and even if there is no anti-reflection film in the spectroscopic device 105, the functions of transmission and reflection can be realized.

Embodiment 2

Referring to FIG. 3, FIG. 3 is a schematic structural diagram of a light source device according to Embodiment 2 of the present invention. The light source device 200 includes a laser light source 201, a light splitting device 205, a wavelength conversion device 209, and a scattering reflection device 207. The difference between this embodiment and the first embodiment is that the spectroscopic device 205 is slightly different from the spectroscopic device 105 in the first embodiment.

As shown in FIG. 4, FIG. 4 is a schematic structural diagram of a light splitting device 205 of a light source device 200 according to Embodiment 2 of the present invention. The light splitting device 205 includes a first area 2051 and a second area 2052. The first region 2051 partially transmits laser light and partially reflects laser light, and the second region 2052 reflects the first light and transmits the second light.

In the present embodiment, the first region 2051 of the spectroscopic device 205 is the same as the spectroscopic device 105 of the first embodiment. For the structure and function, reference may be made to the description of the pair of spectroscopic devices 105 of the above embodiment. That is, the first region 2051 of the spectroscopic device 205 of the embodiment may also be a transparent sheet including two or more laminated layers, and an air gap between the transparent sheet and the transparent sheet, and the first region 2051 may further include a filter. Membrane and antireflection film.

In the present embodiment, the second region 2052 is a region that combines light using wavelength characteristics. The first light (such as yellow light) from the wavelength conversion device 209 and the second light (such as blue light) from the scattering reflection device 207 are incident from both sides of the second region 2052, respectively, the first light is reflected, and the second light is transmitted. , so that the two beams of light are combined into one beam.

In the first embodiment, the spectroscopic device 105 has only one uniform area, and in the present embodiment, the area of the first area 2051 is reduced relative to the spectroscopic device 105, and the second area 2052 is disposed around the first area 2051.

First, after the laser light generated by the laser light source 201 is shaped by the light shaping device, it is incident on the first region 2051 without being incident on the second region 2052, which greatly reduces the cross-sectional area of the light beam, and facilitates generation on the wavelength conversion device 109. Spot.

Next, as described in the first embodiment, the second light generates a loss at the spectroscopic device 105. In this embodiment, after the second light is reflected by the diffuse reflection device 207, the first region 2051 and the second region 2052 are covered. Wherein, the second light incident on the first region 2051 produces the same light loss ratio as in the first embodiment, and the second light incident on the second region 2052 has a higher transmittance, thereby reducing the light of the second light. loss.

The second embodiment is more complicated than the design of the first embodiment, but also brings about beneficial effects such as reducing light loss.

Embodiment 3

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a light source device according to Embodiment 3 of the present invention. The difference between this embodiment and the first embodiment is that the positions of the wavelength conversion device and the scattering reflection device are exchanged.

The light source device 300 of the present embodiment includes a laser light source 301, a spectroscopic device 305, a wavelength conversion device 309, and a scattering reflection device 307. The laser light source 301 is used to emit laser light, the light splitting device 305 is located on the laser light path, the light splitting device 305 reflects part of the laser light to form the first laser light, and transmits part of the laser light to form the second laser light. The optical path where the first laser light is located is the first light path, and the second The optical path where the laser is located is the second optical path. The wavelength conversion device 309 is located on the first optical path, and after receiving the first laser light, converts at least a portion of the first laser light into light of different wavelengths to form a first light exit, and the scattering and reflecting device 307 is located on the second optical path for The two lasers are converted into second light of different light distributions. The wavelength conversion device 309 and the scattering reflection device 307 respectively reflect the first light and the second light to the light splitting device, the light splitting device 305 partially transmitting the first light and partially reflecting the second light, and the first light and the split light transmitted by the light splitting device 305 The second light reflected by device 305 is combined into a single beam.

The transflective characteristics of the spectroscopic device 305 of the present embodiment are exactly opposite to those of the spectroscopic device 105 of the first embodiment. In the present embodiment, the spectroscopic device 305 includes two or more transparent sheets stacked in a stack. In practical applications, more laser light is required to be reflected to the wavelength conversion device 309, and the number of transparent sheets of the light splitting device 305 will be much larger than the number of transparent sheets in the first embodiment. This will bring about an increase in optical loss (the light absorption rate cannot be 0), a large volume of the structure, and an increase in the optical path misalignment (the optical path offset caused by the refraction), which is not within the scope of the present invention and does not affect the present invention. Embodiments improve the effect of uniformity of emitted light color.

For descriptions of other components in this embodiment, refer to the description of Embodiment 1, and details are not described herein again.

Embodiment 4

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a light source device according to Embodiment 4 of the present invention. The difference between this embodiment and the second embodiment is that the positions of the wavelength conversion device and the scattering reflection device are exchanged.

The light source device 400 of the present embodiment includes a laser light source 401, a spectroscopic device 405, a wavelength conversion device 409, and a scattering reflection device 407. The laser light source 401 is used to emit laser light, the light splitting device 405 is located on the laser light path, the light splitting device 405 reflects part of the laser light to form the first laser light, and transmits part of the laser light to form the second laser light. The optical path where the first laser light is located is the first light path, and the second The optical path where the laser is located is the second optical path. The wavelength conversion device 409 is located on the first optical path, and after receiving the first laser light, converting at least a portion of the first laser light into light of different wavelengths to form a first light exit, and the scattering and reflecting device 407 is located on the second optical path for The two lasers are converted into second light of different light distributions. The wavelength conversion device 409 and the scattering reflection device 407 respectively reflect the first light and the second light to the beam splitting device, and the light splitting device 405 partially transmits the first light and partially reflects the second light, and the first light and the split light transmitted by the light splitting device 405 The second light reflected by device 405 is combined into a single beam.

As in the second embodiment, the spectroscopic device 405 of the present embodiment also includes two regions, wherein the first region transmits a portion of the laser light and reflects a portion of the laser light, except that the second region transmits the first light and reflects the second light.

As described in the fifth embodiment, this embodiment also requires more laser light to be reflected by the first region to the wavelength conversion device 409. In the case where the material of the transparent film is unchanged, the number of transparent films required is also larger than that of the embodiment. The number of transparent films in the second. However, the area of the first area in the embodiment is smaller than the area of the spectroscopic device 305 in the fifth embodiment. Therefore, the problem of large volume of the structure and misalignment of the optical path as described in the fifth embodiment is not excessively serious in this embodiment.

For descriptions of other components in this embodiment, refer to the description of the second embodiment, and details are not described herein again.

Still another embodiment of the present invention provides a lighting device comprising the light source device of any of the above embodiments, and further comprising a lens group or the like disposed on the outgoing light path of the beam splitting device.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A light source device comprising a laser light source for emitting laser light, characterized in that:

The optical splitting device is disposed on the laser light path, and the light splitting device transmits part of the laser to form the first laser, and reflects part of the laser to form the second laser. The optical path where the first laser is located is the first optical path, and the optical path where the second laser is located is the second optical path. ;

Included in the first optical path for receiving the first laser light and converting at least a portion of the first laser light into light of different wavelengths to form a first light exit, the wavelength conversion device Light is reflected back to the spectroscopic device, the spectroscopic device partially reflecting the first light;

Included in a second optical path for converting the second laser light into a second light of a different light distribution, and reflecting the second light back to the light splitting device, the light splitting device partially transmitting Second light

The first light reflected by the spectroscopic device and the second light transmitted by the spectroscopic device are combined into a single beam.

The light source device according to claim 1, comprising a light shaping device located on a laser light path between the laser light source and the light splitting device, wherein the light shaping device is sequentially arranged along the laser light path It includes a convex lens, a concave lens, and a diffusion sheet.

3. The light source device according to claim 1, wherein the spectroscopic device comprises two or more transparent sheets arranged in a stack.

4. A light source apparatus according to claim 3, wherein an air gap is provided between the transparent sheet and the transparent sheet.

The light source device according to claim 3, wherein the spectroscopic device comprises a first transparent sheet, and the first transparent sheet is a transparent sheet closest to the wavelength conversion device in each of the transparent sheets, The spectroscopic device further includes a filter film located on a surface of the first transparent sheet adjacent to the wavelength conversion device, the filter film transmitting the laser light and reflecting the first light.

The light source device according to claim 3, wherein the spectroscopic device comprises a second transparent sheet, and the second transparent sheet is a transparent sheet farthest from the wavelength conversion device in each of the transparent sheets. The spectroscopic device further includes an antireflection film located on a surface of the second transparent sheet away from the wavelength conversion device.

The light source device according to claim 1, wherein the spectroscopic device comprises a first region and a second region, the first region partially transmitting the laser light and partially reflecting the laser light, the second The region reflects the first light and transmits the second light.

8. A light source apparatus according to claim 1, wherein said wavelength conversion means comprises a stationary phosphor sheet or a rotatable fluorescent color wheel.

9. A light source device comprising a laser source for emitting laser light, characterized in that:

The optical splitting device is disposed on the laser light path, and the light splitting device reflects part of the laser to form the first laser, and transmits part of the laser to form the second laser. The optical path where the first laser is located is the first optical path, and the optical path where the second laser is located is the second optical path. ;

Included in the first optical path for receiving the first laser light and converting at least a portion of the first laser light into light of different wavelengths to form a first light exit, the wavelength conversion device Light is reflected back to the spectroscopic device, the spectroscopic device partially transmitting the first light;

Included in a second optical path for converting the second laser light into a second light of a different light distribution, and reflecting the second light back to the light splitting device, the light splitting device partially reflecting Second light

The first light transmitted by the spectroscopic device and the second light reflected by the spectroscopic device are combined into a single beam.

The light source device according to claim 9, wherein the spectroscopic device comprises two or more transparent sheets arranged in a stack.

The light source device according to claim 9, wherein the spectroscopic device comprises a first region and a second region, the first region partially transmitting the laser light and partially reflecting the laser light, the second The region transmits the first light and reflects the second light.

12. A lighting device comprising the light source device of any of claims 1-11.