WO2020135304A1

WO2020135304A1 - Light source system and projection apparatus

Info

Publication number: WO2020135304A1
Application number: PCT/CN2019/127284
Authority: WO
Inventors: 郭祖强; 鲁宁; 李屹
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2018-12-29
Filing date: 2019-12-23
Publication date: 2020-07-02
Also published as: CN111381428B; CN111381428A

Abstract

A light source system (100, 200, 300) and a projection apparatus. The light source system (100, 200, 300) comprises: a light source, comprising a first light source (111, 211, 311); a wavelength conversion apparatus (130, 230, 330); a light concentrating apparatus (120, 220, 320), comprising a light concentrating lens (121), with the light concentrating lens (121) being used for concentrating excitation light emitted from the first light source (111, 211, 311) onto the wavelength conversion apparatus (130, 230, 330); and a light deflection apparatus (140, 240, 340), wherein same is arranged in a light path between the first light source (111, 211, 311) and the wavelength conversion apparatus (130, 230, 330) in a time division manner, and is used for deflecting some of the light beams emitted from the first light source (111, 211, 311), so as to adjust the area of light spots that are irradiated by the first light source (111, 211, 311) onto the wavelength conversion apparatus (130, 230, 330). The light source system (100, 200, 300) can improve the light conversion efficiency of excitation light.

Description

Light source system and projection device

Technical field

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

Background technique

With the continuous development of projection display technology, the market has increasingly higher requirements on the performance parameters of projection equipment. High brightness, high dynamic range, high resolution and the largest possible color gamut range have become development trends. At present, compared with the light bulb light source, LED light source and pure laser light source, the laser fluorescent hybrid light source has the advantages of long life, high brightness and high cost performance, and has become an ideal light source for projection equipment. However, the fluorescence generated by laser excitation has a wide spectral wavelength range, and there are more restrictions on expanding the color gamut range than pure laser light sources. Therefore, in order to expand the color gamut range, it is necessary to increase the proportion of pure laser light sources in the laser fluorescent hybrid light source.

In the prior art, the way to increase the proportion of the pure laser light source in the hybrid light source is to directly increase the pure laser light source, as shown in FIG. 1, including the excitation light source 101a for emitting blue laser light, and the blue laser light incident with the fluorescent color wheel 102 A red laser light source 101b and a green laser light source 101c provided on one side opposite to each other to increase the proportion of pure laser light sources. As shown in FIG. 2, in order to adapt to the above light source system, its fluorescent color wheel 102 includes a reflection and scattering area D, which is used to reflect blue laser light emitted by the excitation light source 101 a for reflecting and scattering; the fluorescent color wheel also includes transmission scattering located on the inner ring Zone E and the reflective red fluorescent zone F and green fluorescent zone G located in the outer circle. Among them, the red fluorescent area F is used to receive the excitation light emitted from the excitation light source 101a and convert the wavelength to reflect the red fluorescence. At the same time, the transmission and scattering area E transmits the red laser light emitted from the red laser light source 101b and scatters Fluorescence combined light exit; the green fluorescence area G is used to receive the excitation light emitted by the excitation light source 101a and wavelength conversion reflects green fluorescence, and at the same time, the transmission and scattering area E transmits the green laser light emitted by the green laser light source 101c and scatters to eliminate speckle Afterwards, it emerges with the green fluorescent light.

However, the above light source system has the following problem: when the excitation light emitted from the excitation light source 101a enters the fluorescent color wheel 102 to convert red fluorescence or green fluorescence to the wavelength, the spot portion of the excitation light is in an unexcited state, that is, half of the spot is incident The transmission and scattering area E to the inner circle not only reduces the light conversion efficiency of the red fluorescent area F and the green fluorescent area G, resulting in wasted energy, but also because the transmitted blue laser is easy to communicate with the red laser/green laser on the other side of the fluorescent color wheel Optical interference occurs, further reducing the projection display effect.

Summary of the invention

In order to solve the technical problem of low light conversion efficiency of the existing light source system when the wavelength of the excitation light is converted, the present invention provides a light source system capable of improving the light conversion efficiency of the excitation light, which includes: a light source, and the light source includes a first light source Wavelength conversion device; condensing device, the condensing device includes a condensing lens, the condensing lens is used to condense the excitation light emitted by the first light source on the wavelength conversion device; and light deflection device , The light deflecting device is provided in the optical path between the first light source and the wavelength conversion device in a time-sharing manner to deflect part of the light beam emitted by the first light source to adjust the first light source The spot area irradiated on the wavelength conversion device.

In one embodiment, the light deflecting device is time-shared in the optical path between the first light source and the light condensing device.

In one embodiment, the light deflecting device is time-shared in the optical path between the light concentrating device and the wavelength conversion device.

In one embodiment, the wavelength conversion device includes a wavelength conversion region, a reflection scattering region, and a transmission scattering region, wherein the excitation light emitted from the first light source is condensed on the wavelength conversion device by the condensing device In the wavelength conversion area, the light deflection device is in the optical path between the first light source and the wavelength conversion device to reduce the spot area of excitation light on the wavelength conversion device, and the first light source exits When the excitation light of is converged by the condensing device in the transmission scattering region of the wavelength conversion device, the light deflection device deviates from the optical path between the first light source and the wavelength conversion device.

In one embodiment, the light source further includes a second light source and a third light source, and the first light source is used to emit blue light excitation light, ultraviolet light excitation light, infrared light excitation light, or green light excitation light; the second The light source is used to emit one of red light, blue light and green light; the third light source is used to emit one of red light, blue light and green light.

In one embodiment, the light source system further includes a light collection component and a uniform light device; the light collection component collects and guides the outgoing light of the wavelength conversion device into the uniform light device for uniform light treatment.

In one embodiment, the light collection component includes a bowl-shaped reflection surface, the reflection surface is located between the condenser lens and the wavelength conversion device, and the reflection surface is opposite to the wavelength conversion device One side is recessed and plated with a highly reflective film; the central area of the bowl on the reflecting surface is provided with a light through hole.

In one embodiment, the wavelength conversion device further includes a filter area; the light collection component includes a collection lens group, a regional diaphragm, and a light guide device, and the regional diaphragm includes a blue light transmission region and a reflection region; The blue excitation light emitted by the first light source is sequentially incident on the wavelength conversion device through the blue transmission region and the collection lens group; the output light of the wavelength conversion device is sequentially reflected on the collection lens group and the reflection region After being guided by the light guide device through the filter area, it enters the uniform light device.

In one embodiment, the wavelength conversion device further includes a filter area; the light collection component includes a collection lens group, a dichroic sheet capable of transmitting blue light while reflecting red light and green light, a mirror, and a light guide device; The blue excitation light emitted by the first light source is sequentially incident on the wavelength conversion device through the dichroic sheet and the collection lens group; the red light or green light in the light emitted from the wavelength conversion device sequentially passes through the The collection lens group and the dichroic sheet are reflected and guided by the light guide device through the filter area to enter the uniform light device; the blue light in the light emitted by the wavelength conversion device sequentially passes through the collection lens group , The dichroic sheet transmits, the reflector reflects, the dichroic sheet transmits, and is guided by the light guide device through the filter area and enters the uniform light device.

In one embodiment, the light deflection device includes a light deflection device and a driving member capable of driving the light deflection device, and the driving member drives the light deflection device to periodically move.

In one embodiment, the light deflecting device includes one or more of a wedge prism, a lens, and a mirror.

In one embodiment, the first light source includes a plurality of lasers arranged in an array; the light source system further includes a number of collimating lenses equal to the number of the lasers and arranged in a one-to-one correspondence with the lasers.

The invention also provides a projection device including the light source system in any of the above embodiments.

Compared with the prior art, the light source system provided by the present invention places the light deflection device in the optical path between the first light source and the wavelength conversion device in a time-sharing manner to deflect part of the light beam emitted by the first light source for adjustment The size and position of the excitation light spot incident on the wavelength conversion device makes the excitation light spot converge in the wavelength conversion area as much as possible to reduce the loss of light efficiency of the light spot converging in the transmission scattering area.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a light source system in the prior art.

FIG. 2 is a front view of the fluorescent color wheel in the light source system shown in FIG. 1. FIG.

3 is a schematic structural diagram of a light source system provided by the first embodiment of the present invention.

4 is a front view of the wavelength conversion device in the light source system shown in FIG. 3.

FIG. 5 is a schematic structural diagram of a light source system shown in FIG. 3 in a modified embodiment.

6 is a schematic structural diagram of the light source system shown in FIG. 3 in another modified embodiment.

7 is a schematic structural diagram of a light source system provided by a second embodiment of the present invention.

8 is a front view of the wavelength conversion device in the light source system shown in FIG. 7.

9 is a schematic structural diagram of a light source system provided by a third embodiment of the present invention.

10 is a front view of the wavelength conversion device in the light source system shown in FIG. 9.

Symbol description of main components

Light source system

100, 200, 300

First light source

111, 211, 311

Laser 1111

Second light source

112, 212, 312

Third light source

113, 213, 313

Concentrating

device

120, 220, 320

Condensing lens 121

Wavelength conversion device

130, 230, 330

Wavelength conversion zone

131, 231, 331

Red

fluorescence excitation zone

131r, 231r, 331r

Green

fluorescence excitation area

131g, 231g, 331g

Reflection scattering area

132, 232, 332

Transmission and

scattering area

133, 233, 333

Filter area

234, 334

Blue

light filter area

234b, 334b

Red

light filter area

234r, 334r

Green light filter area 234g, 334g

Light deflection device

140, 240, 340

Optical deflection device 141

Drive parts 142

Light collection components

150, 250, 350

Reflective surface 151

Optical through hole 1511

Collection lens group

251, 351

Regional diaphragms 252

Blue light transmission area 2521

Reflective area 2522

Light guide device 253

Relay lens 2531

Reflector

2532, 353

Uniform

light device

160, 260, 360

Dichroic film

170, 352

The first collimating lens 181

Second collimating lens182

The third collimating lens 183

The following specific embodiments will further illustrate the present invention with reference to the above drawings.

detailed description

Please refer to FIG. 3, which is a schematic structural diagram of a light source system 100 according to a first embodiment of the present invention. The light source system 100 includes a first light source 111, a second light source 112, a third light source 113, a condensing device 120, a wavelength conversion device 130, a light deflecting device 140, a light collecting assembly 150 and a uniform light device 160. The first light source 111 is used to generate and emit excitation light, preferably blue excitation light. It can be understood that the excitation light is not limited to blue excitation light, but can also be ultraviolet excitation light, infrared excitation light, and green excitation light . The second light source 112 is used to generate and emit one of red light, blue light, and green light. The third light source 113 is used to generate and emit one of red light, blue light, and green light. The first light source 111, the second light source 112, and the third light source 113 may be laser light sources, or other semiconductor light sources such as LED light sources.

In the first embodiment, the first light source 111 is a laser light source capable of emitting blue excitation light, which includes a plurality of lasers 1111 arranged in an array. The condensing device 120 includes a condensing lens 121. The condensing lens 121 is disposed between the first light source 111 and the wavelength conversion device 130 for condensing the blue excitation light emitted by the first light source 111 on the wavelength conversion device 130.

Further, the second light source 112 is used to generate and emit red light, the third light source 113 is used to generate and emit green light, and the light source system 100 further includes a dichroic sheet 170 for reflecting the red light emitted by the second light source 112 and At the same time, the green light emitted from the third light source 113 is transmitted. Specifically, the second light source 112 and the third light source 113 are both located on the side of the wavelength conversion device 130 opposite to the first light source 111. The red light emitted by the second light source 112 is reflected by the dichroic sheet 170 and enters the wavelength conversion device 130, and the green light emitted by the third light source 113 is transmitted by the dichroic sheet 170 and enters the wavelength conversion device 130. It can be understood that, in other embodiments, the second light source 112 may be used to generate and emit green light, and the third light source 113 may be used to generate and emit red light. At this time, the corresponding dichroic sheet 170 may reflect the second light source 112 The emitted green light simultaneously transmits the red light emitted by the third light source 113.

Please refer to FIG. 4 together. The wavelength conversion device 130 includes a wavelength conversion region 131, a reflection scattering region 132 and a transmission scattering region 133. In practical applications, the wavelength conversion device 130 performs periodic circular rotation, so that the blue excitation light emitted from the first light source 111 is incident on the wavelength conversion area 131 and the reflection and scattering area 132 in time sequence, wherein the wavelength conversion area 131 is coated with phosphor, The blue excitation light incident on the wavelength conversion region 131 can excite the phosphor to generate fluorescence, and the blue excitation light incident on the reflection and scattering region 132 is directly reflected and the speckle is eliminated by scattering. The transmission scattering region 133 is used to transmit red light and green light incident on the wavelength conversion device 130.

Specifically, the wavelength conversion region 131, the reflection and scattering region 132 and the transmission and scattering region 133 are enclosed in a circular ring shape, and the center of the ring is the rotation center of the wavelength conversion device 130 for circumferential rotation. Wherein, the wavelength conversion region 131 and the transmission scattering region 133 respectively have a "C" shape, the wavelength conversion region 131 is located in the outer circle, and the transmission scattering region 133 is located in the inner circle. The wavelength conversion region 131 is divided equally or unevenly into a red fluorescence excitation region 131r capable of generating red fluorescence and a green fluorescence excitation region 131g capable of generating green fluorescence.

When the blue excitation light emitted from the first light source 111 enters the red fluorescence excitation region 131r, the blue excitation light excites the phosphor to generate red fluorescence, and at the same time, the second light source 112 emits red light, and the red light enters the wavelength conversion device 130 and is transmitted The scattering area 133 transmits to the other side of the wavelength conversion device 130 to combine light with red fluorescence. At this time, the light emitted from the wavelength conversion device 130 is a combined light including red fluorescence and red light emitted from the second light source 112.

When the blue excitation light emitted from the first light source 111 enters the green fluorescence excitation area 131g, the blue excitation light excites the phosphor to generate green fluorescence, and at the same time, the third light source 113 emits green light, and the green light enters the wavelength conversion device 130 and is transmitted The scattering region 133 transmits to the other side of the wavelength conversion device 130 to combine light with green fluorescence. At this time, the light emitted from the wavelength conversion device 130 is a combined light including green fluorescence and green light emitted from the third light source 113.

When the blue excitation light emitted from the first light source 111 enters the reflection and scattering area 132, the blue excitation light is directly reflected and the speckle is eliminated by scattering. At this time, the light emitted from the wavelength conversion device 130 is blue light.

It should be noted that the red, green, and blue light beams emitted by the wavelength conversion device 130 should have the same spot size. In the prior art, the sum of the widths of the wavelength conversion region 131 and the transmission and scattering region 133 is equal to the width of the transmission and scattering region 133. When the blue excitation light spot emitted by the first light source 111 is incident on the wavelength conversion region 131, a part of the light spot is incident on the transmission The phenomenon of the scattering region 133 causes the light conversion efficiency of the blue excitation light to excite fluorescence to decrease. If the blue excitation light spot of the first light source 111 can be fully incident on the wavelength conversion region 131, the light conversion efficiency of the blue excitation light excitation fluorescence will be greatly improved. Therefore, the light source system 100 provided in the first embodiment adjusts the spot size and position of the blue excitation light incident on the wavelength conversion device 130 to make the blue excitation light converge in the wavelength conversion area 131 as much as possible, so as to reduce the convergence of the spot The light efficiency of the transmission scattering region 133 is lost.

The light source system 100 provided in the first embodiment distributes the light deflection device 140 in the optical path between the first light source 111 and the condensing device 120 in a time-sharing manner to deflect part of the light beams emitted by the first light source 111. Specifically, when the blue excitation light emitted by the first light source 111 is condensed by the condenser lens 121 in the wavelength conversion region 131 of the wavelength conversion device 130, the light deflecting device 140 is in the optical path between the first light source 111 and the condenser device 120 When the blue excitation light emitted by the first light source 111 is condensed by the condenser lens 121 in the reflection and scattering region 132 of the wavelength conversion device 130, the light deflection device 140 deviates from the optical path between the first light source 111 and the condenser device 120. At this time, the light deflecting device 120 is in the optical path between the first light source 111 and the condensing device 120 for reducing the spot area of the blue excitation light emitted by the first light source 111 on the wavelength conversion device 130.

It can be understood that, in a modified embodiment, please refer to FIG. 5, when the blue excitation light emitted by the first light source 111 is condensed by the condenser lens 121 to the wavelength conversion region 131 of the wavelength conversion device 130, the light deflection device 140 deviates The optical path between the first light source 111 and the condensing device 120; when the blue excitation light emitted by the first light source 111 is condensed by the condenser lens 121 in the reflection and scattering area 132 of the wavelength conversion device 130, the light deflecting device 140 is in the first light source 111 In the light path with the light condensing device 120. At this time, the light deflecting device 120 is located in the optical path between the first light source 111 and the condensing device 120 for increasing the spot area of the blue excitation light emitted by the first light source 111 on the wavelength conversion device 130.

It should be noted that, in another modified embodiment, referring to FIG. 6, the light deflection device 140 may also be time-shared in the optical path between the light condensing device 120 and the wavelength conversion device 130. Specifically, when the excitation light emitted by the first light source 111 is condensed by the condenser lens 121 in the wavelength conversion region 131 of the wavelength conversion device 130, the light deflecting device 140 is in the optical path between the condensing device 120 and the wavelength conversion device 130; When the excitation light emitted from the first light source 111 is condensed in the reflection and scattering region 132 of the wavelength conversion device 130 through the condenser lens 121, the light deflection device 140 deviates from the optical path between the light collection device 120 and the wavelength conversion device 130. At this time, the light deflecting device 120 is in the optical path between the condensing device 120 and the wavelength conversion device 130 for reducing the spot area of the blue excitation light emitted by the first light source 111 on the wavelength conversion device 130.

It can be understood that, as a modification of the above-mentioned another modified embodiment, when the excitation light emitted by the first light source 111 is condensed to the wavelength conversion region 131 of the wavelength conversion device 130 through the condenser lens 121, the light deflection device 140 deviates from the condensing device The optical path between 120 and the wavelength conversion device 130; when the excitation light emitted from the first light source 111 is condensed by the condenser lens 121 to the reflection and scattering region 132 of the wavelength conversion device 130, the light deflection device 140 is located between the light collection device 120 and the wavelength conversion device In the light path between 130. At this time, the light deflecting device 120 is in the optical path between the condensing device 120 and the wavelength conversion device 130 for increasing the spot area of the blue excitation light emitted by the first light source 111 on the wavelength conversion device 130.

Specifically, the light deflection device 140 includes a light deflection device 141 and a driving member 142 capable of driving the light deflection device 141 to move. The driving member 142 drives the light deflecting device 141 to move periodically.

In the first embodiment, the light deflecting device 141 is a wedge prism. In other embodiments, the light deflection device 141 may also be an optical device such as a lens or a mirror capable of deflecting light, used to deflect a part of the excitation light beam emitted by the first light source 111, thereby adjusting the excitation emitted by the first light source 111 The spot size and position of the light converging on the wavelength conversion device 130.

The light deflection device 140 is used to adjust the spot area and size of the excitation light emitted by the first light source 111 on the wavelength conversion device 130. Specifically, when the light deflection device 140 is in the optical path, it is used to reduce the excitation light emitted by the first light source 111 When the spot area on the wavelength conversion area 131, the light source system 100 places the light deflection device 140 in the optical path between the first light source 111 and the wavelength conversion device 130 when red and green light needs to be emitted. When it is necessary to emit blue light, the light deflection device 140 is deviated from the optical path between the first light source 111 and the wavelength conversion device 130. When the light deflection device 140 is in the optical path for increasing the spot area of the excitation light emitted by the first light source 111 on the reflection and scattering area 132, the light source system 100 places the light deflection device 140 at the first light source when blue light needs to be emitted In the optical path between 111 and the wavelength conversion device 130, the light source system 100 deviates the light deflection device 140 from the optical path between the first light source 111 and the wavelength conversion device 130 when red or green light needs to be emitted.

The light collecting assembly 150 collects and guides the outgoing light of the wavelength conversion device 130 into the light homogenizing device 160 to perform light homogenization processing. In the first embodiment, the light collecting assembly 150 includes a bowl-shaped reflecting surface 151, the reflecting surface 151 is located between the condenser lens 121 and the wavelength conversion device 130, and the side opposite to the reflecting surface 151 and the wavelength conversion device 130 is recessed and plated There is a highly reflective film. Therefore, the outgoing light of the wavelength conversion device 130 is reflected by the side of the reflection surface 151 coated with the high reflection film, and then enters the uniform light device 160.

In the first embodiment, the light diffusing device 160 is a square light diffusing rod. In other embodiments, the light diffusing device 160 may also be a light diffusing rod of other shapes or a compound eye lens that also has a light diffusing effect.

Further, a light through hole 1511 is opened in the central area of the bowl of the reflecting surface 151. It can be understood that the light through hole 1511 is disposed near the focal point of the condenser lens 121 away from the first light source 111, so that the excitation light emitted from the first light source 111 passes through the light through hole 1511 and enters the wavelength conversion device 130.

Further, the light source system 100 further includes a first collimating lens 181 that collimates the blue excitation light emitted by the first light source 111 and a second collimator that collimates the red light emitted by the second light source 112 The lens 182 and the third collimating lens 183 that collimate the green light emitted from the third light source 113. It can be understood that although the angle of divergence of the excitation light is small, the brightness of the beam will be reduced due to the expansion of the cross-sectional area of the beam during the propagation process, so it is necessary to improve the collimation of the beam.

In the first embodiment, the number of first collimating lenses 181 is equal to the number of lasers 1111 and is arranged in one-to-one correspondence with the lasers 1111. The excitation light emitted from each laser 1111 is collimated by a corresponding first collimating lens 181 deal with.

It should be noted that the excitation efficiency of the phosphor is affected by the power density of the spot of the excitation light incident on the wavelength conversion device 130, and the higher the power density, the more serious the saturation of the phosphor, that is, the higher the power density, the excitation of the phosphor The lower the efficiency. In order to improve the excitation efficiency of the phosphor, the position of each laser 1111 is adjusted so as to deviate from the optical axis of a first collimating lens 181 to different degrees, so that the excitation light emitted by each laser 1111 passes through a corresponding first collimator The exit angle after the straight lens 181 is different, so that the excitation light emitted from each laser 1111 does not coincide with the spot on the wavelength conversion device 130, reducing the power density of the spot of excitation light incident on the wavelength conversion device 130, Improve the excitation efficiency of phosphor.

Please refer to FIG. 7, which is a schematic structural diagram of a light source system 200 according to a second embodiment of the present invention. The light source system 200 provided by the second embodiment is substantially similar to the light source system 100 provided by the first embodiment, and also includes a first light source 211, a second light source 212, a third light source 213, a condensing device 220, a wavelength conversion device 230, and light The deflection device 240, the light collection assembly 250 and the uniform light device 260.

The light source system 200 provided in the second embodiment is different from the light source system 100 provided in the first embodiment in that the light collection assembly 250 includes a collection lens group 251, an area diaphragm 252, and a light guide device 253. The regional diaphragm 252 includes a blue light transmission area 2521 and a reflection area 2522. The blue excitation light emitted by the first light source 211 sequentially enters the wavelength conversion device 230 through the blue transmission region 2521 and the collection lens group 251. The outgoing light of the wavelength conversion device 230 is reflected by the collection lens group 251 and the reflection area 2522 in order, and is guided by the light guide device 253 into the uniform light device 260.

Referring to FIG. 8 together, the wavelength conversion device 230 in the second embodiment is substantially similar to the wavelength conversion device 130 in the first embodiment, and also includes a wavelength conversion region 231, a reflection scattering region 232, and a transmission scattering region 233, where, The wavelength conversion region 231 is divided equally or unevenly into a red fluorescence excitation region 231r capable of generating red fluorescence and a green fluorescence excitation region 231g capable of generating green fluorescence. The difference is that the wavelength conversion device 230 further includes a filter area 234, which is used to filter out the wavelength portion of the output light of the wavelength conversion device 230 where the color saturation is insufficient, so that the light output of the light source system 200 is more pure.

Specifically, the filter area 234 includes a blue light filter area 234b, a red light filter area 234r, and a green light filter area 234g, which are annular and segmented along the circumferential direction. The center angles corresponding to the blue filter area 234b and the reflection and scattering area 232 are equal and set at 180°; the center angles corresponding to the red filter area 234r and the red fluorescence excitation area 231r are equal and set at 180°; green filter The area 234g and the green fluorescence excitation area 231g have corresponding center angles equal to each other and are arranged at 180°.

In the second embodiment, the light guide device 253 includes a relay lens 2531 and a reflection mirror 2532, and the light emitted by the wavelength conversion device 230 is transmitted through the collection lens group 251, reflected by the reflection area 2522, and reflected by the relay lens 2531 and the reflection mirror 2532 in sequence. After filtering through the filter area 234, it enters the uniform light device 260.

Compared with the light source system 100 provided in the first embodiment, the light collection assembly 250 in the light source system 200 provided in the second embodiment can effectively reduce the light loss of the wavelength conversion device 230. The reason is that: in the first embodiment, the light through hole 1511 formed in the central area of the reflecting surface 151 can pass the light emitted by the wavelength conversion device 230, causing light loss; in the second embodiment, the light emitted by the wavelength conversion device 230 The red light and green light in the light cannot pass through the blue light transmission region 2521, thereby reducing the loss of outgoing light. In addition, the blue light emitted by the wavelength conversion device 230 can basically be regarded as unpolarized light. Because the blue excitation light incident on the reflection and scattering area 232 of the wavelength conversion device 230 undergoes scattering and changes the polarization state, the blue light transmission area 2521 can be coated to make It transmits blue light of a specific polarization state and reflects blue light of other polarization states, which further reduces the loss of light emitted by the wavelength conversion device 230.

In addition, compared with the light source system 100 provided in the first embodiment, the light collection component 250 in the light source system 200 provided in the second embodiment reduces the volume of the light source system 100 in the projection device by collecting the lens group 251, which is more practical.

Please refer to FIG. 9, which is a schematic structural diagram of a light source system 300 according to a third embodiment of the present invention. The light source system 300 provided by the third embodiment is substantially similar to the light source system 200 provided by the second embodiment, and also includes a first light source 311, a second light source 312, a third light source 313, a condensing device 320, a wavelength conversion device 330, a light The deflection device 340, the light collection assembly 350 and the uniform light device 360.

Please refer to FIG. 10 together. The wavelength conversion device 330 in the third embodiment is completely the same as the wavelength conversion device 230 in the second embodiment, and also includes a wavelength conversion region 331, a reflection scattering region 332, a transmission scattering region 333, and a filter. Region 334, wherein the wavelength conversion region 331 is equally or unevenly divided into a red fluorescence excitation region 331r and a green fluorescence excitation region 331g, and the filter region 334 includes a blue filter region 334b, a red filter region 334r, and a green filter Area 334g.

The light source system 300 provided by the third embodiment differs from the light source system 200 provided by the second embodiment in that the light collection assembly 350 includes a collection lens group 351 and a dichroic sheet capable of transmitting blue light while reflecting red and green light 352, reflecting mirror 353 and light guiding device 354. That is, the dichroic film 352 and the mirror 353 are used instead of the area diaphragm 252.

Specifically, the dichroic film 352 and the wavelength conversion device 330 are inclined and the reflecting mirror 353 is located on a side of the dichroic film 352 opposite to the wavelength conversion device 330. The blue excitation light emitted by the first light source 311 enters the wavelength conversion device 330 through the dichroic sheet 352 and the collection lens group 351 in sequence. The red light or green light in the light emitted by the wavelength conversion device 330 is reflected by the collection lens group 351 and the dichroic sheet 352 in sequence, guided by the light guide device 354 through the filtered light region 334, and then enters the uniform light device 360. The blue light in the light emitted by the wavelength conversion device 330 is sequentially transmitted through the collection lens group 351, the dichroic sheet 352, reflected by the reflecting mirror 353, and transmitted by the dichroic sheet 352.装置360。 The device 360.

Compared with the light collection assembly 250 of the second embodiment, the light collection assembly 350 of the third embodiment uses a dichroic sheet 352 and a mirror 353 instead of the area diaphragm, which can further reduce the light loss of the wavelength conversion device 330.

The above are only the embodiments of the present invention, and therefore do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly used in other related technical fields, The same reason is included in the patent protection scope of the present invention.

Claims

A light source system, characterized in that it includes:

A light source, the light source includes a first light source;

Wavelength conversion device;

Condensing device, the condensing device includes a condensing lens, the condensing lens is used to condense the excitation light emitted from the first light source on the wavelength conversion device; and

A light deflection device, which is provided in the optical path between the first light source and the wavelength conversion device in a time-sharing manner to deflect a part of the light beam emitted by the first light source to adjust the The spot area irradiated by the first light source on the wavelength conversion device.
The light source system according to claim 1, wherein the light deflecting device is time-shared in the optical path between the first light source and the condensing device.
The light source system according to claim 1, wherein the light deflecting device is time-divisionally disposed in the optical path between the light condensing device and the wavelength conversion device.
The light source system according to any one of claims 1 to 3, wherein the wavelength conversion device includes a wavelength conversion area, a reflection and scattering area, and a transmission and scattering area, wherein the excitation light emitted from the first light source passes through the When the optical device is converged in the wavelength conversion region of the wavelength conversion device, the light deflection device is located in the optical path between the first light source and the wavelength conversion device to reduce the conversion of excitation light at the wavelength Light spot area on the device, when the excitation light emitted by the first light source is condensed in the transmission scattering region of the wavelength conversion device by the light condensing device, the light deflection device deviates from the first light source and the The optical path between wavelength conversion devices.
The light source system according to any one of claims 1 to 3, wherein the wavelength conversion device includes a wavelength conversion area, a reflection and scattering area, and a transmission and scattering area, wherein the excitation light emitted from the first light source passes through the When the light device converges in the reflection and scattering area of the wavelength conversion device, the light deflection device is located in the optical path between the first light source and the wavelength conversion device to increase the excitation light conversion at the wavelength The spot area on the device, when the excitation light emitted by the first light source is condensed in the wavelength conversion region of the wavelength conversion device by the condensing device, the light deflection device deviates from the first light source and the The optical path between wavelength conversion devices.
The light source system of claim 1, wherein the light source further comprises a second light source and a third light source, and the first light source is used to emit blue light excitation light, ultraviolet light excitation light, infrared light excitation light or green light Light excitation light; the second light source is used to emit one of red light, blue light, and green light; and the third light source is used to emit one of red light, blue light, and green light.
The light source system according to claim 1, wherein the light source system further comprises a light collection component and a uniform light device; the light collection component collects the outgoing light of the wavelength conversion device and guides it into the uniform light The device is evenly processed.
The light source system according to claim 7, wherein the light collection component includes a bowl-shaped reflecting surface, the reflecting surface is located between the condenser lens and the wavelength conversion device, and the reflecting surface The side opposite to the wavelength conversion device is recessed and plated with a high-reflection film; the central area of the bowl of the reflection surface is provided with a light through hole.
The light source system according to claim 7, wherein the wavelength conversion device further includes a filter area; the light collection assembly includes a collection lens group, an area diaphragm and a light guide device, the area diaphragm includes blue light The transmission area and the reflection area; the blue excitation light emitted from the first light source sequentially enters the wavelength conversion device through the blue transmission area and the collection lens group; the output light of the wavelength conversion device sequentially passes the collection The lens group and the reflection area are reflected, and are guided by the light guide device through the filter area and enter the uniform light device.
The light source system according to claim 7, wherein the wavelength conversion device further includes a filter area; the light collection component includes a collection lens group, a dichroic sheet capable of transmitting blue light while reflecting red light and green light , A mirror and a light guide device; the blue excitation light emitted by the first light source is sequentially incident on the wavelength conversion device through the dichroic sheet and the collection lens group; the red light in the light emitted by the wavelength conversion device The light or green light is reflected by the collection lens group and the dichroic sheet in order, and then guided by the light guide device through the filter area and enters the uniform light device; the wavelength conversion device emits light The blue light is transmitted through the collection lens group, the dichroic sheet, the mirror reflection, and the dichroic sheet in sequence, and then is guided by the light guide device through the filter area and enters the uniform light Device.
The light source system according to claim 1, wherein the light deflecting device includes a light deflecting device and a driving member capable of driving the light deflecting device to move, and the driving member drives the light deflecting device to move periodically .
The light source system according to claim 11, wherein the light deflecting device includes one or more of a wedge prism, a lens, and a reflector.
The light source system of claim 1, wherein the first light source includes a plurality of lasers arranged in an array; the light source system further includes a number equal to the number of the lasers and one-to-one with the lasers Correspondingly set collimating lens.
A projection device, characterized by comprising the light source system according to any one of claims 1 to 13.