WO2019144544A1 - Light source system and projection device - Google Patents

Abstract

Provided are a light source system and a projection device. The light source system comprises an excitation light source, a supplemental light source, a wavelength conversion apparatus and a guide apparatus, wherein the guide apparatus comprises a first beam-splitting filter, a second beam-splitting filter, a third beam-splitting filter and a fourth beam-splitting filter; the second beam-splitting filter comprises a central region and a peripheral region around the central region; fluorescent light of a first colour generated by the wavelength conversion apparatus under excitation of the excitation light successively passes through the first beam-splitting filter and the peripheral region and is reflected to the third beam-splitting filter; laser of a first colour emitted from the supplemental light source passes through the central region and then irradiates the third beam-splitting filter; the third beam-splitting filter reflects the fluorescent light of a first colour and the laser of a first colour to a light-out channel; and the laser emitted from a transmissive region of the wavelength conversion apparatus is reflected by the fourth beam-splitting filter, and then enters the light-out channel through the third beam-splitting filter.

Description

Light source system and projection equipment Technical field

The present invention relates to the field of projection technologies, and in particular, to a light source system and a projection device.

Background technique

This section is intended to provide a context or context for the specific embodiments of the invention set forth in the claims. The description herein is not admitted to be prior art as it is included in this section.

Currently, projection equipment is widely used in various applications such as movie broadcasting, conferences, and publicity. In the light source system of the prior art projection apparatus, excitation light generated by an excitation light source is generally used to excite the fluorescent color wheel, thereby generating a laser sequence.

Generally, the red phosphor in the fluorescent color wheel is excited to generate a red fluorescent spectrum having a wide spectral range, resulting in a low color saturation of the red fluorescent light. In order to obtain better color saturation, the laser generated by the fluorescent color wheel is generally filtered by providing a filter on the downstream optical path of the fluorescent color wheel.

However, the filter traps some of the unusable light in the red fluorescence, resulting in a lower luminance of the red light emitted by the light source system, and the projection device does not display well.

Summary of the invention

In order to solve the technical problem that the light source system emits red light with low brightness in the prior art, the present invention provides a light source system and a projection device.

a light source system, including

Exciting a light source for emitting excitation light;

a supplemental light source for emitting a first color laser;

a wavelength conversion device comprising at least a conversion region and a transmission region, wherein the wavelength conversion device periodically moves to facilitate rotation of the conversion region and the transmission region on an optical path of the excitation light; the conversion region is in the excitation light a laser is generated under excitation, the conversion region includes a first conversion region, and the received laser light includes a first color fluorescence generated by the first conversion region under excitation of the excitation light, the excitation light passing through Transmitting the transmission area; and

The guiding device comprises a first spectral filter, a second spectral filter, a third spectral filter and a fourth spectral filter; the second spectral filter comprises a central region and is located around the central region a surrounding area, the first color fluorescence is sequentially reflected by the first spectral filter and the surrounding area to the third spectral filter; the first color laser passes through the central area and is illuminated To the third spectral filter; the third spectral filter reflects the first color fluorescent light and the first color laser light to an light exiting channel; and the excitation light emitted from the transmissive region of the wavelength conversion device passes through After the reflection of the fourth spectral filter, the third spectral filter is incident on the light exiting passage.

A light source system includes: an excitation light source, a collecting device, a supplemental light source, a light conversion and light combining device, a light homogenizing device, a first heat sink device, and a second heat sink device; wherein:

The excitation light source is for emitting excitation light, the optical axis of the excitation light being parallel to the first direction;

The collecting device is in the shape of a funnel for collecting and collecting the excitation light, so that the excitation light is emitted from the gathering opening of the collecting device, and enters the light converting and combining device;

The supplemental light source is disposed on a side of the gather opening in a second direction, the second direction is substantially perpendicular to the first direction, and the supplemental light source is configured to emit a first color laser, the first color laser Entering the light conversion and light combining device along an optical axis parallel to the first direction;

The light conversion and light combining device is generally square in shape, and is arranged downstream of the optical path of the collecting device and the supplementary light source along the first direction, and the width occupied by the second direction is not Exceeding the width of the collecting device and the supplemental light source side by side in the second direction; the light converting and combining device is configured to output the excitation in time series based on the excitation light and the supplemental light Light, converted light of the excitation light, and the supplemental light, and causing an outgoing direction of the output light to be parallel to the second direction;

The light homogenizing device extends in a direction parallel to the second direction for receiving the light outputted by the light converting and combining device and performing uniform light;

The first heat dissipating device and the excitation light source are arranged side by side in the second direction, and are thermally connected to the excitation light source;

The second heat sink and the supplemental light source are arranged side by side in the second direction and are thermally connected to the supplemental light source.

A projection apparatus comprising a light source system as described above.

In the light source system provided by the present invention, the first color laser light emitted by the complementary light source and the laser light received by the light source are used to increase the brightness of the light source system and the projection device applying the light source system to emit red light.

DRAWINGS

FIG. 1 is a schematic diagram showing the structure and internal main optical path of a light source system according to a first embodiment of the present invention.

2 is a schematic structural view of a wavelength conversion device shown in FIG. 1.

3 is a schematic structural view of a second spectral filter as shown in FIG. 1.

4 is a schematic diagram showing the structure and internal main optical path of a light source system according to a second embodiment of the present invention.

For example, 5 is a transmittance curve of a central region of the second spectral filter as shown in FIG.

Fig. 6 is a transmittance curve of a peripheral region of the second spectral filter shown in Fig. 4.

Fig. 7 is a transmittance curve of the fourth spectral filter shown in Fig. 4.

Main component symbol description

Light source system	100, 200
Excitation source	112
Supplementary light source	115, 215
First fan	114
Second fan	117
First heat sink	113
Second heat sink	116
Wavelength conversion device	120, 220
First transition zone	R

Second transition zone	G
Transmissive zone	B
First spectroscopic filter	131
Second spectroscopic filter	134,234
Central region	134a
Surrounding area	134b
Third spectroscopic filter	136,236
Fourth spectroscopic filter	138, 238
Homogenizer	150, 250
Light conversion and light combining device	170
Collecting device	180
First opening	182
Closed mouth	184
Second opening	186
Light exit channel	190

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

Detailed ways

The light source system provided by the embodiment of the invention can solve the problem that the brightness of the emitted red light is not high, and can be applied to a projection device, such as a liquid crystal display (LCD) or a digital light path processor (DLP).

Please refer to FIG. 1 to FIG. 3 . FIG. 1 is a schematic diagram showing the structure and internal main optical path of a light source system 100 according to a first embodiment of the present invention. FIG. 2 is a schematic structural view of the wavelength conversion device 120 shown in FIG. 1. FIG. 3 is a schematic structural view of the second spectral filter 134 shown in FIG. 1.

As shown in FIG. 1, the light source system 100 includes an excitation light source 112, a supplemental light source 115, a wavelength conversion device 120, and a guiding device. The excitation light source 112 is for emitting excitation light; a part of the excitation light is excited to the wavelength conversion device 120 to generate a laser beam, and the supplementary light source 115 is for emitting a first color laser. In the embodiment, the first color is red. The laser light, the unconverted excitation light, and the first color laser light are guided to the light exit passage 190 by the guiding device.

Specifically, the excitation light source 112 may be a blue light source that emits blue excitation light. It can be understood that the excitation light source 112 is not limited to the blue light source, and the excitation light source 112 can also be an ultraviolet light source, a red light source or a green light source. In the present embodiment, the excitation light source 112 includes a blue laser for emitting blue laser light as excitation light. It can be understood that the illuminant 121 can include one, two or more blue laser arrays, and the number of lasers can be selected according to actual needs. It can be understood that the excitation light source 112 may further include a light homogenizing device such as a fly-eye lens or a light-dancing rod to de-cohere the excitation light, thereby reducing the probability of occurrence of the laser speckle phenomenon.

The supplemental light source 115 is for emitting a first color laser, including a first color laser, or a first color laser array.

As shown in FIG. 2, the wavelength conversion device 120 includes a conversion region and a transmission region B. The conversion region generates a laser light under excitation of the excitation light. The conversion region includes a first conversion region R provided with a red phosphor and a second conversion region G provided with a green phosphor, and the received laser includes a first color fluorescence and a second conversion region generated by the first conversion region R The second fluorescence produced by G, the first color fluorescence is red fluorescence, and the second color fluorescence is green fluorescence. The excitation light can be emitted through the transmission region B, and the first color fluorescence, the second color fluorescence, and the excitation light emitted from the transmission region B are combined by the guiding device to obtain white light emitted from the light source system 100. Light. It will be appreciated that in one embodiment, a scattering material may be disposed in the transmissive region B for scattering blue excitation light. It can be understood that, in one embodiment, the conversion region of the wavelength conversion device 120 includes a first conversion region provided with a yellow phosphor, and the second conversion region is omitted. The yellow laser light generated by the first conversion region is combined with the unconverted blue excitation light to obtain white light emitted from the light source system 100, wherein the red fluorescent component in the yellow received laser light is the first color fluorescence. It can be understood that the conversion region may also be provided with wavelength conversion materials of other colors to combine with the excitation light to obtain white light, and the excitation light is not limited to blue.

Referring to FIG. 1 further in conjunction with FIG. 2, the wavelength conversion device 120 can include a substrate disposed on a surface of the substrate. The wavelength conversion device 120 includes a driving unit disposed at a geometric center of the bottom of the substrate, the driving unit driving the substrate to periodically rotate around the geometric center, thereby facilitating rotation of the conversion region and the transmission region B at the excitation light. On the optical path, the wavelength conversion device 120 periodically emits the first color fluorescence, the second color fluorescence, and the unconverted excitation light. It can be understood that the substrate may be in a strip shape, and the driving unit is disposed at one end of the substrate to drive the wavelength conversion device 120 to perform periodic reciprocating motion. When the first conversion region R is located on the optical path where the excitation light is located, the supplementary light source 115 turns on and emits the first color laser, and the second conversion region G and the transmission region B are located on the optical path where the excitation light is located. The supplemental light source 115 is turned off to achieve the combination of the first color laser and the first color fluorescence to enhance the brightness of the red light emitted by the light source system 100.

The light emitted by the light source system 100 needs to reach a predetermined white balance. Therefore, the ratio of the amount of light between the first color laser and the first color fluorescence, and the ratio of the first conversion region R, the second conversion region G, and the transmission region B of the wavelength conversion device 120 on the surface of the substrate need to be satisfied. The corresponding conditions. When the proportion of the first color laser light amount increases, and the ratio of the first color fluorescent light amount decreases, the ratio of the angle of the first conversion region R to the wavelength conversion device 120 can be reduced, and when the first color laser light amount is reduced, When the ratio of the amount of fluorescent light of the first color is increased, the ratio of the angle of the first conversion region R to the wavelength conversion device 120 can be increased to satisfy the requirement. The arrangement of the supplemental light source 115 is advantageous for reducing the angle occupied by the first conversion region R on the wavelength conversion device 120, so that the angle occupied by the second conversion region G and the transmission region B can be increased, thereby improving the brightness of the light source system 100 as a whole. .

As shown in FIGS. 1 and 3, the guiding device includes a first beam splitting filter 131, a second beam splitting filter 134, a third beam splitting filter 136, and a fourth beam splitting filter 138. As shown in FIG. 3, the second spectral filter 134 includes a central region 134a and a peripheral region 134b located around the central region 134a. The first color fluorescence is sequentially reflected by the first spectral filter 131 and the surrounding region 134b to the third spectral filter 136; the first color laser passes through the central region 134a and is irradiated to the third spectral filter 136. The first color fluorescence and the first color laser are optically expanded and combined by the second spectral filter 134, and then reflected by the third spectral filter 136; the wavelength conversion device 120 transmits the region B. The emitted excitation light is reflected by the fourth spectral filter 138 and then exits through the third spectral filter 136.

Specifically, the first spectral filter 131 is used to reflect the laser light emitted from the wavelength conversion device 120 to the second spectral filter 134. The first spectral filter 131 may be a total reflection mirror or an optical glass provided with a reflective film. In an embodiment, the first spectroscopic filter 131 may be plated with an optical film that reflects a laser beam of a specific wavelength range, such as a first color fluorescence and a second color fluorescence that reflect a specific wavelength range, and the first color is intercepted. a color fluorescence and a part of the light in the second color fluorescence and the unconverted excitation light to perform color correction on the laser light. In addition, the first light spectrum filter 131 can also transmit the excitation light to avoid The unconverted excitation light emerging from the conversion region enters the subsequent guiding element.

As shown in FIG. 3, the second spectral filter 134 includes a central region 134a and a surrounding region 134b. The central region 134a is plated with an anti-reflection film for transmitting the first color laser and the laser light. The surrounding area 134b is plated with a reflective film for reflecting the received laser light. In the present embodiment, the central area 134a is located at the geometric center of the second spectral filter 134, and the surrounding area 134b is located at the edge of the central area 134a. The positions of the central region 134a and the surrounding region 134b correspond to the incident positions of the first color laser light and the laser light receiving region. That is, in other embodiments, the central region 134a may not be disposed at the geometric center position of the second spectral filter 134. In one embodiment, the central region 134a is configured to transmit light in a wavelength range corresponding to the first color laser, and reflect light outside the wavelength range of the first color laser to reduce the loss of the laser. Preferably, the surrounding area 134b is configured to reflect the first color fluorescence and the second color fluorescence in a specific wavelength range, and transmit a part of the first color fluorescence and the second color fluorescence to the first color fluorescence and the The second color of fluorescence is used for color correction.

The fourth spectral filter 138 is used to reflect the received laser light emitted from the transmission region B of the wavelength conversion device 120, and may be a total reflection mirror.

The third spectral filter 136 is configured to reflect the received laser light and transmit the excitation light. In the embodiment, the third spectral filter 136 is an anti-yellow blue dichroic filter.

As shown in FIG. 1 , a plurality of divergence angle relay lenses for adjusting light are disposed between the spectral filters in the guiding device. In the embodiment of the present invention, the plurality of relay lenses are convex lenses. It is to be understood that, in an embodiment, other relay devices may be disposed between the spectroscopic filters in the guiding device, and are not limited thereto.

The guiding device further includes a collecting lens disposed between the wavelength converting device 120 and the first spectral filter 131, the collecting lens is configured to concentrate the excitation light incident on the surface of the wavelength conversion device 120, and adjust the wavelength conversion device 120. The divergence angle of the outgoing light. In an embodiment, the collecting lens may also be a collecting lens group including a plurality of lenses whose optical axes coincide.

The light source system 100 further includes a light homogenizing device 150 disposed in the light exiting channel 190. The light emitted by the third spectral filtering filter 136 is dimmed by the light homogenizing device 150 and then emitted from the light source system 100. The light homogenizing device 150 may be a fly-eye lens. Or a light stick or the like.

Referring to FIG. 1 again, the light source system 100 provided by the embodiment of the present invention has the characteristics of compact spatial arrangement. The light source system 100 includes an excitation light source 112, a collecting device 180, a supplemental light source 115, a light conversion and light combining device 170, and a light homogenizing device. 150. The first heat sink 113 and the second heat sink 116. The excitation light source 112 is configured to emit excitation light, the optical axis of the excitation light is parallel to the first direction, and the collecting device 180 is funnel-shaped for collecting and collecting the excitation light, so that the excitation light is collected from the collecting device 180. The closing port 184 exits and enters the light conversion and light combining device 170; the supplementary light source 115 is disposed along the second direction on the side of the gathering opening 184, the second direction is substantially perpendicular to the first direction, and the supplementary light source 115 is used for Generating a first color laser that enters the light conversion and light combining device 170 along an optical axis parallel to the first direction; the light conversion and light combining device 170 is generally square in shape along the first One direction is arranged downstream of the optical path of the collecting device 180 and the supplemental light source 115, and the width occupied by the second direction does not exceed the width occupied by the collecting device 180 and the supplemental light source 115 in the second direction; The conversion and light combining device 170 is configured to output the excitation light, the converted light of the excitation light, and the first color laser in time series based on the excitation light and the first color laser, and output the Light out Parallel to the second direction; the light homogenizing device 150 extends in a direction parallel to the second direction for receiving the light converted by the light conversion and light combining device 180 and performing uniform light; the first heat sink 113 and the excitation The light sources 112 are arranged side by side in the second direction and are thermally connected to the excitation light source 112; the second heat sink 116 and the supplemental light source 115 are arranged side by side in the second direction and are thermally connected to the supplemental light source 115.

Specifically, the collecting device 180 includes a funnel-shaped first sidewall and at least one converging lens disposed in the first sidewall, and the converging lens is disposed in the gradually narrowing first sidewall. In the mode, the inner side of the gradually narrowing first side wall has a reflection effect on the excitation light, and has a folding effect on the light emitted from the laser array in the excitation light source 112. It will be appreciated that collection device 180 can include other optical components, components or systems capable of collecting the excitation light.

The first side wall of the collecting device 180 includes a closing opening 184 and a first opening 182 disposed opposite the closing opening 184. The aperture of the first opening 182 is larger than the gathering opening 184, and the end of the gathering opening 184 is connected to the light converting and combining device 170. The light emitting surface of the excitation light source 112 is disposed corresponding to the first opening 182, so that the excitation light is along the light. The shaft is incident on the collection device 180 parallel to the first direction.

The light conversion and light combining device 170 includes a substantially square second sidewall and a wavelength conversion device 120 disposed in the second sidewall and the guiding device. The converted light of the excitation light is a received laser light emitted from the wavelength conversion device 120.

The first spectral filter 131, the second spectral filter 134, the third spectral filter 136, and the fourth spectral filter 138 of the guiding device are respectively disposed inside the second sidewall. In a corner position, the wavelength conversion device 120 is disposed between the first spectral filter 131 and the fourth spectral filter 138 such that the light output and the output direction of the light output by the light combining device 170 are parallel to the second direction, and The components of the light conversion and light combining device 170 are compactly arranged. It can be understood that the internal components of the light conversion and light combining device 170 can also adopt other arrangements that can make the second sidewall occupy a small space, and are not limited thereto.

The second side wall is disposed at a position adjacent to the gathering opening 184, and the supplementary light source 115 is disposed corresponding to the second opening 186. The first color laser enters the light conversion along the optical axis parallel to the first direction. Light combining device 170.

The end of the second heat sink 116 away from the supplemental light source 115 in the second direction and the end of the first heat sink 113 away from the excitation light source 112 in the second direction are substantially side by side in the parallel direction of the first direction. The heat from the excitation light source 112 is transmitted along the first heat sink 113, and is radiated into the air through the surface area of the first heat sink 113; likewise, the heat on the supplemental light source 115 is dissipated through the second heat sink 116.

The light homogenizing device 150 is disposed inside the light exiting channel 190, and the light homogenizing device 150 and the light exiting channel 190 each extend in a direction parallel to the second direction.

The light homogenizing device 150 is away from the end of the light converting and combining device 170 in the second direction and the end of the first heat dissipating device 113 away from the excitation light source 112 in the second direction, substantially in the parallel direction of the first direction side by side.

The excitation light source 112 is relatively large in power, the power of the supplemental light source 115 is relatively small, such that the volume of the supplemental light source 115 relative to the excitation light source 112 is small, and the supplemental light source 115 is disposed beside the gathering opening 184, supplementing the first color emitted by the light source 115. The direction in which the laser light is emitted is substantially parallel to the direction in which the excitation light emitted from the excitation light source 112 is emitted, and the complementary light source 115 effectively utilizes the space released by the gathering opening 184, so that the space is arranged closely.

In the second direction, the excitation source 112 is substantially flush with the supplemental source 115. The width of the light conversion and light combining device 170 in the second direction does not exceed the width occupied by the collecting device 170 and the supplemental light source 115 in the second direction; in the second direction, the first heat sink 113 is far away One end of the excitation light source 112, one end of the second heat sink 116 away from the supplemental light source 115, and one end of the light homogenizing device 150 away from the light conversion and light combining device 170 are substantially side by side in the parallel direction of the first direction, and the space arrangement is compact. .

In the first direction, the excitation light source 112 and the first heat dissipation device 113 are substantially parallel to one end of the light-dissipating channel 190, and the excitation light source 112 and the supplementary light source 115 are arranged alternately. The light source system 100 is substantially square and has a compact structure.

The light source system 100 further includes a first fan 114 and a second fan 117 to apply airflow to the first heat sink 113 and the second heat sink 116, respectively, to remove heat. The first heat sink 113, the first fan 114, the second heat sink 116, and the second fan 117 are sequentially arranged in the parallel direction of the first direction. It can be understood that the first heat sink 113, the first fan 114, the second heat sink 116, and the second fan 117 can be disposed on the excitation light source 112, the collection device 180, the light conversion and light combining device 170, and the light exiting channel 190. Other arrangements in the side space. For example, the excitation light source 112 and the first heat dissipation device are respectively located at two sides of the first fan 114, and the supplementary light source 115 and the second heat dissipation device 116 are respectively disposed at two sides of the second fan 117. It can be understood that, in one embodiment, the heat dissipating device can selectively omit or add a specific heat dissipating component, and is not limited thereto.

In one embodiment, the first fan 114 and the second fan 117 are used to draw air or blow air in the same direction to form a directional airflow to dissipate heat to the first heat sink 113 and the second heat sink 116.

In the present embodiment, the first color laser light emitted by the supplemental light source 115 is combined with the laser light, and is used to increase the brightness of the light source system 100 and the projection device that applies the light source system 100 to emit red light. The excitation light source 112, the supplemental light source 115, and the guiding device and the optical channel are arranged in a compact space, which is advantageous for the miniaturization design of the light source system 100 and the projection device.

Please refer to FIG. 4 , which is a schematic diagram of the structure and internal main optical path of the light source system 200 according to the second embodiment of the present invention. The main difference between the light source system 200 provided in the present embodiment and the light source system 100 provided in the first embodiment is that the first conversion region of the wavelength conversion device 220 in the light source system 200 is provided with a yellow phosphor and generates a yellow color. The laser light includes a first color fluorescence and a second color fluorescence, the first color fluorescence is red fluorescence, and the second color fluorescence is green fluorescence. The yellow laser light is incident on the second spectral filter 236 after the second spectral filter 234 is optically expanded by the first color laser. The second color fluorescence generated by the second conversion region G of the wavelength conversion device 220 passes through the wavelength conversion device 220, is reflected by the fourth spectral filter 238, and is incident on the third spectral filter 236. The third spectral filter 236 transmits the first color fluorescent light, and reflects the second color fluorescent light and the excitation light. When the first conversion region is located on the optical path of the excitation light, the supplementary light source 215 is turned on, and when the second conversion region G and the transmission region B are located on the optical path of the excitation light, the supplementary light source 215 is turned off. The first color laser is combined with the first color fluorescence to enhance the brightness of the red light emitted by the light source system 100. It should be noted that, within the scope of the spirit or the essential features of the present invention, the specific solutions applicable to the first embodiment may also be correspondingly applied to the second embodiment, in order to save space and avoid repetition, here I won't go into details.

Please refer to FIG. 5, which is a transmittance curve of a central region of the second spectral filter 234 shown in FIG. The central region is for transmitting the first color laser, the first color of the yellow laser, and the second color. Preferably, the central region transmits light in a first predetermined wavelength range, and the first color laser wavelength range is located in the first predetermined wavelength range to ensure that the first color laser can pass through the second The spectral filter 234 is combined with the laser light to increase the brightness of the red light emitted by the light source system 100. The wavelength range of the first color fluorescence is wider, and the first predetermined wavelength range is located in the wavelength range of the first color fluorescence, and the central area is capable of trapping part of the light in the first color fluorescence to improve The saturation of the red light is emitted. The central region also transmits the second color of fluorescence.

Please refer to FIG. 6, which is a transmittance curve of the surrounding area of the second spectral filter 234 shown in FIG. The surrounding area is for reflecting the first color laser, the first color fluorescence, and transmitting the second color fluorescence. The central region and the surrounding region of the second spectral filter 234 both transmit the second color fluorescence, so that the second color fluorescence of the yellow received laser light cannot enter the light homogenizing device 250, and only the yellow laser is used. The first color of the fluorescent portion. Preferably, the surrounding area has a color modifying function for the first color fluorescence, the surrounding area reflects light in a second predetermined wavelength range, and a wavelength range of the first color laser is located in the second preset In the wavelength range, the second predetermined wavelength range is located in the first color fluorescence wavelength range to intercept part of the light in the first color fluorescence, and reflect a portion of the first color fluorescence that can be utilized.

Please refer to FIG. 7 , which is a transmittance curve of the fourth spectral filter 238 as shown in FIG. 4 . In this embodiment, the fourth spectral filter 238 has a color correction function for the second color fluorescence, and the fourth spectral filter 238 is configured to reflect the second color fluorescence in the third predetermined wavelength range. The three predetermined wavelength ranges fall within the second color fluorescence wavelength range. That is, the fourth spectroscopic filter 238 reflects a part of the light in the second color fluorescence, and transmits the band component that cannot be utilized in the second color fluorescence to improve the light source system 200 and the projection device of the application light source system 200 to emit green light. Saturation.

The light source system 200 provided in the present embodiment can perform color correction on the emitted red light and the green light, thereby improving the quality of the projected image of the projection device.

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 (14)

1. A light source system characterized by comprising

   Exciting a light source for emitting excitation light;

   a supplemental light source for emitting a first color laser;

   a wavelength conversion device comprising at least a conversion region and a transmission region, wherein the wavelength conversion device periodically moves to facilitate rotation of the conversion region and the transmission region on an optical path of the excitation light; the conversion region is in the excitation light a laser is generated under excitation, the conversion region includes a first conversion region, and the received laser light includes a first color fluorescence generated by the first conversion region under excitation of the excitation light, the excitation light passing through Transmitting the transmission area; and

   The guiding device comprises a first spectral filter, a second spectral filter, a third spectral filter and a fourth spectral filter; the second spectral filter comprises a central region and is located around the central region a surrounding area, the first color fluorescence is sequentially reflected by the first spectral filter and the surrounding area to the third spectral filter; the first color laser passes through the central area and is illuminated To the third spectral filter; the third spectral filter reflects the first color fluorescent light and the first color laser light to an light exiting channel; and the excitation light emitted from the transmissive region of the wavelength conversion device passes through After the reflection of the fourth spectral filter, the third spectral filter is incident on the light exiting passage.
2. The light source system according to claim 1, wherein said first conversion region is provided with a red phosphor, and said first color fluorescence is red fluorescence.
3. The light source system according to claim 1, wherein said first conversion region is provided with a yellow phosphor, and said first color fluorescence is red fluorescence generated by said yellow phosphor.
4. A light source system according to claim 1, wherein said conversion region further comprises a second conversion region, said laser-receiving portion comprising said second conversion region generating a second color of fluorescence under illumination of said excitation light, The wavelength conversion device reflects the second color fluorescence to the first spectral filter, and the second color fluorescence sequentially passes through the first spectral filter, the surrounding region of the second spectral filter And the third spectral filter is reflected to the light exit channel.
5. The light source system according to claim 1, wherein said conversion region further comprises a second conversion region, said laser receiving light comprising a second color fluorescence generated by said second conversion region under irradiation of said excitation light, The wavelength conversion device transmits the second color fluorescence to the fourth spectral filter, and the second received laser passes through the third spectral filter after passing through the third spectral filter The light sheet is incident on the light exit passage.
6. The light source system according to claim 5, wherein said central area is for transmitting said first color laser, said first color fluorescence and said second color fluorescence, said peripheral area being for reflection The first color laser, the first color fluorescence, and the second color fluorescence are transmitted.
7. The light source system according to claim 1 or 6, wherein the central region transmits light in a first predetermined wavelength range, and the first color laser wavelength range is located in the first preset complementary range, The first pre-wavelength range is within the first color fluorescence wavelength range.
8. The light source system according to claim 7, wherein the surrounding area reflects light in a second predetermined wavelength range, and the wavelength range of the first color laser is in the second predetermined wavelength range, The second predetermined wavelength range is within the first color fluorescence wavelength range.
9. The light source system according to claim 6, wherein the fourth spectral filter is configured to reflect a second color fluorescence in a third predetermined wavelength range, and the third predetermined wavelength range falls within the The second color fluorescence wavelength range.
10. A light source system, comprising: an excitation light source, a collecting device, a supplemental light source, a light converting and combining device, a light homogenizing device, a first heat dissipating device and a second heat dissipating device; wherein:

    The excitation light source is for emitting excitation light, the optical axis of the excitation light being parallel to the first direction;

    The collecting device is in the shape of a funnel for collecting and collecting the excitation light, so that the excitation light is emitted from the gathering opening of the collecting device, and enters the light converting and combining device;

    The supplemental light source is disposed on a side of the gather opening in a second direction, the second direction is substantially perpendicular to the first direction, and the supplemental light source is configured to emit a first color laser, the first color laser Entering the light conversion and light combining device along an optical axis parallel to the first direction;

    The light conversion and light combining device is generally square in shape, and is arranged downstream of the optical path of the collecting device and the supplementary light source along the first direction, and the width occupied by the second direction is not Exceeding the width of the collecting device and the supplemental light source side by side in the second direction; the light converting and combining device is configured to output the excitation in time series based on the excitation light and the supplemental light Light, converted light of the excitation light, and the supplemental light, and causing an outgoing direction of the output light to be parallel to the second direction;

    The light homogenizing device extends in a direction parallel to the second direction for receiving the light outputted by the light converting and combining device and performing uniform light;

    The first heat dissipating device and the excitation light source are arranged side by side in the second direction, and are thermally connected to the excitation light source;

    The second heat sink and the supplemental light source are arranged side by side in the second direction and are thermally connected to the supplemental light source.
11. A light source system according to claim 10, wherein

    An end of the second heat dissipating device away from the supplemental light source in the second direction and an end of the first heat dissipating device away from the excitation light source in the second direction, parallel in the first direction The directions are roughly side by side.
12. The light source system according to claim 10, wherein the light homogenizing device is away from one end of the light converting and combining device in the second direction and the first heat dissipating device in the second direction The one end away from the excitation light source is substantially side by side in the parallel direction of the first direction.
13. The light source system according to claim 10, further comprising a first fan and a second fan;

    The first heat sink, the first fan, the second heat sink, and the second fan are sequentially arranged in a parallel direction of the first direction;

    The first fan and the second fan are configured to suck or blow air in the same direction to form a directional airflow to dissipate heat to the first heat sink and the second heat sink.
14. A projection apparatus comprising the light source system according to any one of claims 1-13.

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