WO2020216264A1 - 光源系统及显示装置 - Google Patents

光源系统及显示装置 Download PDF

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Publication number
WO2020216264A1
WO2020216264A1 PCT/CN2020/086242 CN2020086242W WO2020216264A1 WO 2020216264 A1 WO2020216264 A1 WO 2020216264A1 CN 2020086242 W CN2020086242 W CN 2020086242W WO 2020216264 A1 WO2020216264 A1 WO 2020216264A1
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WIPO (PCT)
Prior art keywords
light
light source
path
source system
excitation
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Ceased
Application number
PCT/CN2020/086242
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English (en)
French (fr)
Inventor
郭祖强
鲁宁
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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Publication of WO2020216264A1 publication Critical patent/WO2020216264A1/zh
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the present invention relates to the field of display technology, in particular to a light source system and a display device using the light source system.
  • the brightness demand of projection products is getting higher and higher.
  • the method of increasing the number of lasers emitting the excitation light ie, laser
  • the power of the laser light incident on the color wheel also increases, and the power density of the laser increases accordingly, and the high-power density laser excites the phosphor on the color wheel, causing the phosphor saturation problem to become more and more serious.
  • the current common method is to add a homogenizing device in the laser light path to reduce the peak power density of the laser spot incident on the phosphor wheel.
  • homogenizing devices include diffuser, single compound eye, light rod and double compound eye.
  • the degree of dilution of the diffuser to the optical expansion is relatively large, which is not suitable for light sources with small optical expansion; the uniform light effect of the single compound eye is not good enough, and it is very sensitive to the incident light angle, and the system tolerance is too small; The light homogenization effect is good, but the length of the light rod is generally longer, which is not suitable for products with strict volume requirements; the double compound eye has a good homogenization effect and small size, which has high practicability.
  • the laser has high coherence, and the laser spot after the double compound eyes is homogenized will have obvious interference phenomenon, which reduces the homogenization effect.
  • the homogenization effect caused by the laser coherence it is difficult to completely eliminate it by only increasing the size of the double compound eye unit; more importantly, the increase in the size of the compound eye unit will reduce the number of times the beam is divided by the compound eye, and the compound eye homogenization effect The problem is that it is difficult to improve the homogenization effect and eliminate the interference phenomenon at the same time.
  • One aspect of the present invention provides a light source system, including:
  • the first light source is used to emit excitation light
  • the timing light splitting element is used for time-sharing to emit the excitation light along a first path and a second path different from the first path, and the timing light splitting element is also used for increasing all the light emitted along the first path.
  • the divergence angle of the excitation light is used for time-sharing to emit the excitation light along a first path and a second path different from the first path, and the timing light splitting element is also used for increasing all the light emitted along the first path.
  • a wavelength conversion device for converting the received excitation light after homogenization treatment into a received laser light and emitting it, and the combined light of the received laser light and the excitation light emitted along the second path serves as the light source The light source of the system is emitted.
  • Another aspect of the present invention provides a display device including the above-mentioned light source system.
  • the light source system provided by the embodiment of the present invention is applied to a light source structure of laser plus fluorescence.
  • the light source system includes a first light source that emits excitation light, a sequential light splitting element, and a light homogenizing device.
  • the excitation light is increased by increasing the divergence angle by the sequential light splitting element.
  • the large light spot area makes the light spot large enough for the excitation light to enter the homogenizing device, which is beneficial to improve the uniform light effect of the homogenizing device.
  • FIG. 1 is a schematic diagram of the structure of the light source system provided in the first embodiment.
  • FIG. 2 is a schematic diagram of the planar structure of the sequential light splitting element in FIG. 1.
  • FIG. 3 is a schematic diagram of the light path of the first light guide area of the timing light splitting element in FIG. 2.
  • FIG. 4 is a schematic diagram of the light path of the second light guide area of the time-series light splitting element in FIG. 2.
  • Fig. 5 is a schematic structural diagram of a light source system provided in the second embodiment.
  • FIG. 6 is a schematic diagram of the light path of the first light guide area of the time-series light splitting element in FIG. 5.
  • FIG. 7 is a schematic diagram of the light path of the second light guide area of the time-series light splitting element in FIG. 5.
  • FIG. 8 is a schematic diagram of the structure of the light source system provided in the third embodiment.
  • Fig. 9 is a schematic structural diagram of a light source system provided in the fourth embodiment.
  • FIG. 10 is a schematic diagram of the light path of the first light guide area of the sequential light splitting element in FIG. 9.
  • FIG. 11 is a schematic diagram of the structure of the light source system provided in the fifth embodiment.
  • the light source system 100 provided in this embodiment includes:
  • the first light source 110 is used to emit excitation light.
  • the timing light splitting element 120 is used for time-sharing to emit the excitation light along a first path and a second path different from the first path, and the timing light splitting element is also used to increase the amount of light emitted along the first path.
  • the divergence angle of the excitation light is used for time-sharing to emit the excitation light along a first path and a second path different from the first path, and the timing light splitting element is also used to increase the amount of light emitted along the first path. The divergence angle of the excitation light.
  • the homogenization device 130 is used to homogenize the received excitation light emitted along the first path after the divergence angle is increased, and then emit it.
  • the wavelength conversion device 140 is configured to convert the received excitation light after homogenization treatment into a received laser light and emit it.
  • the combined light of the received laser light and the excitation light emitted along the second path serves as the The light source light of the light source system is emitted.
  • the first light source 110 is used to emit excitation light.
  • the first light source 110 is a laser, and the excitation light is a blue laser.
  • the first light source may also be a light emitting diode or the like.
  • the light source system 100 further includes a lens 151 for condensing light arranged between the first light source 110 and the sequential light splitting element 120.
  • the excitation light emitted by the light source system 100 passes through the lens 151, It is incident on the sequential light splitting element 120.
  • the excitation light is laser light, which has good directivity and a small divergence angle. Therefore, the light spot when incident on the sequential light splitting element 120 is small.
  • the time-series light splitting element 120 is used to increase its divergence angle, and time-sharing the excitation light after the increased divergence angle is emitted along the first path and the second path. In other embodiments, the timing light splitting element 120 only increases the divergence angle of the excitation light emitted along the first path, but does not increase the divergence angle of the excitation light emitted along the second path.
  • the timing light splitting element 120 is a disc structure including a first light guiding area 121 and a second light guiding area 122 that are spliced with each other, and also includes fixed to the timing light splitting element 120
  • the first driver 123 in the center, the first driver 123 drives the sequential light splitting element 120 to rotate, so that the first light guide area 121 and the second light guide area 122 are alternately located on the light path of the excitation light.
  • the excitation light divergence angle increases and is guided to exit along the first path
  • the second light guide area 122 is located on the light path of the excitation light
  • the excitation light divergence angle increases And is guided to exit along the second path.
  • the first light guide area 121 has a first incident surface 121a and a first exit surface 121b disposed opposite to each other.
  • the first incident surface 121a is used to scatter the received light
  • the first incident surface 121a and the One exit surface 121b is plated with a high-transmittance film for transmitting received light.
  • the excitation light enters from the first incident surface 121a, is scattered by the first incident surface 121a, the divergence angle increases, and is transmitted from the first incident surface 121a, and then exits through the first The surface 121b transmits through.
  • the transmission path of the excitation light shown in FIG. 3 is the first path.
  • the second light guide region 122 has a second incident surface 122a, and the second light incident surface is a scattering surface for scattering the excitation light at least once.
  • the second incident surface 122a is used to scatter the excitation light once. Specifically, the second incident surface 122a is coated with a highly reflective film.
  • the excitation light is incident from the second incident surface 122a, is scattered by the second incident surface 122a, the divergence angle increases, and is reflected by the second incident surface 122a.
  • the transmission path of the excitation light in FIG. 4 is the second path.
  • the second incident surface 122a is used to scatter the excitation light twice.
  • the second light guiding area 122 further includes a first reflective surface 122b disposed opposite to the second incident surface 122a, the second incident surface 122a is coated with a high-transmission film, and the first reflective surface 122b is coated with a high-reflection film.
  • the excitation light is incident from the second incident surface 122a, is scattered by the second incident surface 122a, the divergence angle increases, and is transmitted by the second incident surface 122a, and then enters the first reflection
  • the surface 122b is then reflected by the first reflective surface 122b to the second incident surface 122a, is scattered by the second incident surface 122a and then transmitted to the second path.
  • the excitation light is scattered twice, that is, the excitation light divergence angle is increased twice. Based on the first embodiment, the excitation light divergence angle is further increased.
  • the time-series light-splitting element 120 is in a rotating state, and in the first period, the first light guide area 121 rotates to the exit path of the excitation light, and the excitation light is guided by the first light guide area 121 along the first During the second time period, the second light guide region 122 rotates to the exit path of the excitation light, and the excitation light is guided by the first light guide region 121 to exit along the second path.
  • the inclination angle ⁇ of the time-series light splitting element 120 is set to 45°. Of course, in other embodiments, the inclination angle ⁇ may also be other angles, which is not limited here.
  • the time-series light splitting element 120 rotates so that the first light guide area 121 and the second light guide area 122 are alternately located on the light path of the excitation light.
  • other methods may also be used to realize that the first light guide area 121 and the second light guide area 122 are alternately located on the light path of the excitation light.
  • the first light in the sequential light splitting element 120 can be realized by pulling in a certain direction.
  • the guide area 121 and the second light guide area 122 are alternately located on the light path of the excitation light.
  • the light homogenizing device 130 is a fly-eye lens, specifically, a double compound eye, which includes a plurality of compound eye units 131.
  • the light homogenizing device 130 uses each compound eye unit 131 to homogenize the aforementioned parallel light beams.
  • the compound eye unit The greater the number of 131, the better the homogenization effect, that is, the higher the uniformity of the brightness of the light emitted from the homogenization device 130. It is understandable that the more compound eye units 131 included in a homogenizing device 130 means that the size of each compound eye unit 131 is smaller. The production of a small-sized structure increases the difficulty of the manufacturing process and makes it difficult to meet the accuracy requirements. .
  • the excitation light is a laser
  • the light spot is small. If the size of the compound eye unit 131 is increased to reduce the process difficulty, the number of compound eye units 131 covered by the light spot is small, and the number of times the light spot is cut by each compound eye unit 131 is reduced, resulting in uniform light. The uniform light effect of the device 130 cannot meet the requirements.
  • the excitation light is scattered by the timing light splitting element 120 to increase its divergence angle.
  • the excitation light emitted from the timing light splitting element 120 is collimated by the light collecting lens 152 and then incident on the homogenizing device 130 as a parallel beam.
  • the above-mentioned parallel light beam is obtained by scattering the excitation light, and the spot area formed on the homogenizing device 130 is larger than that when the excitation light is emitted from the first light source 110, even if it is increased to a certain extent in order to reduce the difficulty of the manufacturing process
  • the light spot can still cover a larger number of compound eye units 131, and the light spot can be divided multiple times to meet the uniform light effect requirement of the light homogenizer 130.
  • the rotating time-sequential light splitting element 120 can also weaken the interference phenomenon of the excitation light at the same time, and the uniform light effect is further improved.
  • the above-mentioned time-series light-splitting element 120 does not have a light scattering function, and a diffuser (not shown) can be provided separately from the time-series light-splitting element 120.
  • the diffusion sheet is arranged between the time-series light splitting element 120 and the light homogenizing device 130.
  • the diffuser can be set to remain stationary, or can be set to move in a preset manner to achieve the effect of eliminating speckles.
  • the motion in the above preset manner may include, but is not limited to, circular motion, resonance motion, translational motion, and the like.
  • the light source system 100 further includes a light collecting lens 152 arranged between the homogenizing device 130 and the timing light splitting element 120, and the divergence angle of the excitation light emitted along the first path guided by the first light guiding region 121 is increased ,
  • the light-receiving lens 152 converges and collimates it, and the excitation light emitted by the light-receiving lens 152 is a parallel beam. Since the parallel beam is formed after the excitation light is scattered by the first light guide region 121, the parallel beam The spot area formed by the light beam is larger than the spot area when the excitation light is emitted from the first light source 110.
  • the angular distribution of the excitation light beam after the divergence angle is increased by the sequential light splitting element 120 is continuous, that is, the angular distribution of the incident angle of the beam is continuous, that is, within the range of the incident angle acceptable to the homogenizing device 130, each angle is The incident angle has a corresponding light.
  • the beam surface distribution becomes larger and the surface distribution is continuous, that is, the unit of the beam projection surface of the excitation light collimated by the light collecting lens 152
  • the difference in the angle of incidence between each light is more uniform. Therefore, the overall difference in the angle of incidence of the light incident on the homogenization device 130 is relatively small, which is beneficial to improve the homogenization effect of the homogenization device 130.
  • the light homogenizing device 130 is a double compound eye
  • one of the two compound eye units 131 in the double compound eye is set at the focal position of the other, and the excitation light emitted from the sequential light splitting element 120 is collimated by the light receiving lens 152 as
  • the parallel light beams are beneficial to make the light converged by one of the compound eye units 131 hit the other compound eye unit 131, thereby helping to improve the uniform light effect of the double compound eyes.
  • the light source system 100 further includes a reflective sheet 160, a lens 153, and a beam splitter 170.
  • the reflective sheet 160 and the lens 153 are used to jointly guide the excitation light homogenized by the light homogenizing device 130 to the beam splitter 170.
  • other methods can also be used to guide the excitation light to the beam splitter 170.
  • the beam splitter 170 is used to reflect the excitation light and to transmit the received laser light emitted by the wavelength conversion device 140.
  • the wavelength conversion device 140 is a color wheel, and includes a second driver 141.
  • the second driver 141 can drive the wavelength conversion device 140 to rotate.
  • the wavelength conversion device 140 is provided with yellow phosphor, and the excitation light is a blue laser and a blue laser.
  • the yellow fluorescent powder excited by the colored laser light can be converted into yellow fluorescent light (that is, the above-mentioned received laser light) and emitted.
  • the beam splitter 170 is used to reflect blue laser light and transmit yellow fluorescent light.
  • the light source system 100 further includes a lens 154, a lens 155, a lens 156, a light collection system 157, and a light combining element 180.
  • the light combining element 180 may adopt a dichroic plate to selectively transmit light of different wavelengths; in another embodiment, the light combining element 180 may also use a zone coating film to perform light treatment in different areas. Different ways to guide.
  • the light combining element 180 is a dichroic film.
  • the lens 154 is used for condensing the received laser light emitted from the beam splitter 170 and guiding it to the light combining element 180, and the excitation light emitted along the second path is guided to the light combining element 180 through the lens 155 and the lens 156. Due to the small spot area of the excitation light, the small area in the center of the light combining element 180 is used to reflect the excitation light, while the laser light emitted from the beam splitter 170 has a larger area, which is the area of the light combining element 180 other than the central area. transmission. The excitation light reflected by the light combining element 180 and the laser light transmitted by the light combining element 180 are combined and emitted, and the received laser light becomes an intermediate image at the position of the light combining element 180.
  • the light source system 100 further includes a relay lens 158 and a homogenizing system 190.
  • the combined light divergence angle of the excitation light emitted from the light combining element 180 and the received laser light is relatively large, and the combined light is converged by the relay lens 158 It is guided to the homogenization system 190, and the homogenization system 190 homogenizes the combined light to make the brightness distribution uniform.
  • the homogenization system 190 can be a homogenization rod, compound eyes, or the like.
  • the combined light after homogenization is excellent as the light source light of the light source system 100, where the light source light includes but is not limited to being used for illumination or display.
  • the light source system 100 provided in this embodiment is applied to a laser plus fluorescent light source structure.
  • the light source system 100 includes a first light source 110 that emits excitation light, a time-series light splitting element 120, and a homogenizing device 130.
  • the excitation light is increased by the time-series light splitting element 120.
  • the large divergence angle increases the light spot, so that the light spot of the excitation light incident on the homogenizing device 130 is large enough. Even if the size of the fly eye unit 131 in the fly eye lens is increased to a certain extent in order to reduce the difficulty of the manufacturing process, the spot area becomes larger. A large number of compound eye units 131 can still be covered, and the light spot can be divided multiple times to meet the uniform light effect requirements of the light homogenizer 130.
  • time-sequential light splitting element 120 time-sharing will emit the excitation light with the increased divergence angle along the first path and the second path different from the first path, which can weaken the interference phenomenon of the excitation light and further improve the uniformity effect.
  • the light source system 100 may further include a second light source (not shown), and the second light source is used to emit light of at least one color (such as red light and green light). At least one), the light emitted by the second light source and the excitation light transmitted through the first path and the second path are combined by the light combining element 180.
  • a second light source not shown
  • the second light source is used to emit light of at least one color (such as red light and green light). At least one), the light emitted by the second light source and the excitation light transmitted through the first path and the second path are combined by the light combining element 180.
  • the second light source can be arranged on the same side of the time-series light splitting element 120 as the first light source 110.
  • the second light guide area 122 of the time-series light splitting element 120 is located on the light emission path of the second light source, the second light source is turned on.
  • the main difference between the light source system 200 provided in this embodiment and the first embodiment is that the structure of the sequential light splitting element 120 is different, and the first light source 110 and the lens 151 are arranged at different positions.
  • the difference part is described in detail.
  • the first light source 110, the lens 151, and the light homogenizing device 130 are arranged on the same side of the sequential light splitting element 120.
  • the timing light splitting element 120 includes a first light guiding area 121 and a second light guiding area 122.
  • the first light guide area 121 has a third incident surface 121 c and a light guide surface 121 d on which a high reflection film is plated.
  • the third incident surface 121 c and the light guide surface 121 d are disposed opposite to each other.
  • the third incident surface 121c is used to scatter the excitation light.
  • the excitation light enters from the third incident surface 121c, is scattered by the third incident surface 121c, the divergence angle increases, and is transmitted by the third incident surface 121c, and enters the light guiding surface 121d. It is reflected by the light guide surface 121d to the third incident surface 121c, and is scattered again by the third incident surface 121c. After the divergence angle increases again, it transmits through the third incident surface 121c.
  • the light path shown in FIG. 6 is the above-mentioned first path.
  • the second light guide region 122 has a fourth incident surface 122c and a third exit surface 122d oppositely disposed.
  • the fourth incident surface 122c is used to transmit and scatter the excitation light.
  • the third exit surface 122d is plated with high transmission. Film, used to transmit excitation light.
  • the excitation light is incident from the fourth incident surface 122c, is scattered by the fourth incident surface 122c, the divergence angle is increased, and is transmitted by the fourth incident surface 122c to the third exit surface 122d, and is transmitted by the third exit surface 122d, as shown in FIG.
  • the light path is the second path mentioned above.
  • the light source system 200 can achieve all the beneficial effects as described in the first embodiment.
  • the excitation light incident on the first light guide region 121 and emitted along the first path is scattered by the time-series light splitting element 120 and then emitted, which further increases the excitation light compared to the first embodiment.
  • the divergence angle of the light further increases the excitation light spot emitted along the first path from the sequential light splitting element 120, which improves the homogenization effect of the homogenization device 130; in addition, the blue laser (excitation light in this embodiment) has a high reflectivity. Therefore, when the time-sequential beam splitting element 120 reflects the blue laser, the loss of the blue laser is small, the light utilization rate is improved, and the influence on the color coordinate of the laser generated when the phosphor is excited is further reduced.
  • the light source system 200 may further include a second light source (not shown), and the second light source is used to emit at least one color light (for example, at least one of red light and green light).
  • the light emitted by the two light sources and the excitation light transmitted through the first path and the second path are combined by the light combining element 180.
  • the second light source it is beneficial to increase the image display color gamut of the light emitted from the light combining element 180.
  • the setting method of the second light source can refer to the description in the first embodiment, which will not be repeated here.
  • the main difference between the light source system 300 provided in this embodiment and the second embodiment is that the light homogenizing device 130 includes two single fly-eye lenses 132a and 132b separately arranged.
  • the light homogenizing device 130 includes two single fly-eye lenses 132a and 132b separately arranged. The following only discusses the differences from the second embodiment Give a detailed description.
  • the thickness of the double compound eye in the second embodiment is related to the focal length of the compound eye unit 131, and the larger the size of the compound eye unit 131, the longer the focal length of the compound eye unit 131, and the greater the thickness of the double compound eye. Therefore, as the size of the compound eye unit 131 of the double compound eye is increased, the thickness of the double compound eye will become thicker, which increases the difficulty of the manufacturing process and increases the cost. Therefore, in this embodiment, considering the above-mentioned factors, when the size of the compound eye unit 131 of the double compound eye becomes larger, the homogenizing device 130 is set to include two separate fly eye lenses, namely the single compound eye lens 132a and the single compound eye lens. Lens 132b.
  • the size of the compound eye unit 131 in this embodiment becomes larger, when the single fly eye lens 132a and the single fly eye lens 132b are aligned, the alignment accuracy requirements become smaller, which is easy to implement and can reduce costs.
  • the second example has high practicality.
  • the light source system 300 provided in this embodiment can also achieve all the beneficial effects described in the second embodiment.
  • the light source system 400 provided in this embodiment differs from the third embodiment mainly in that the timing light splitting element 120 has a different structure and the light source system 400 further includes a second light source 410, a dichroic film 420, and a regional coating film 430 . Only the differences from the third embodiment will be described in detail below.
  • the second light source 410 is used to emit the first color light and the second color light.
  • the first color light and the second color light are red laser light and green laser light, respectively.
  • the dichroic plate 420 is used to transmit the excitation light emitted by the first light source 110 and used to reflect the first color light and the second color light emitted by the second light source 410.
  • the second light source 410 may be configured to emit light of only one color, for example, only red or green light may be emitted; in another embodiment, the second light source 410 may be configured to emit light of multiple colors to obtain Wider color gamut improves display effect.
  • the light guide surface 121d is plated with a dichroic film for incident light from the third incident surface 121c
  • the excitation light is reflected to the third incident surface 121c, and transmits the first color light and the second color light.
  • the transmission path of the excitation light after exiting the first light guide area 121 is as described in the third embodiment.
  • the first color light and the second color light transmitted through the light guide surface 121d are guided to the regional coating sheet through the lens 155 and the lens 156. 430.
  • the transmission light path when the excitation light is incident on the second light guiding region 122 is also as described in the third embodiment, that is, it is guided to the regional coating sheet 430 through the lens 155 and the lens 156 together.
  • the light source system 400 replaces the light combining element 180 in the light source system 300 with the area coating 430 in the light source system 400, and the central area of the light incident surface 431 of the area coating 430 is coated with a highly reflective film through the lens 155 and the lens 156
  • the concentrated excitation light, the first color light and the second color light are all incident on the central area and reflected by the area coating film 430; the remaining area of the area coating film 430 is coated with a high transmission film, and the laser light emitted from the wavelength conversion device 140 is incident
  • the light source system 400 provided in this embodiment can achieve all the beneficial effects as described in the third embodiment.
  • the second light source 410 emitting the first color light and the second color light is added, Expand the color gamut of the light source.
  • the main difference between the light source system 500 provided in this embodiment and the first embodiment is that: in this embodiment, the light homogenizing device 130 is a light homogenizing square rod, and the light source system 500 does not include a light receiving lens 152.
  • the homogenization device 130 is a homogenization square rod. Since the timing light splitting element 120 scatters the excitation light and increases the divergence angle of the excitation light, the area of the excitation light spot when incident on the homogenization square rod is compared When the excitation light is emitted from the first light source 110, the spot area should be large, which is beneficial to improve the uniform light effect. Since the uniform light square rod has lower requirements for the incident light angle than the double fly eye lens, the light collecting lens 152 can be omitted in this embodiment, and a better uniform light effect can also be obtained. Of course, the light uniform device 130 When it is a uniform light square rod, the light collecting lens 152 can also be used to further improve the uniform light effect.
  • the above-mentioned time-series light-splitting element 120 does not have the function of scattering light, so a diffuser (not shown) can be arranged independently of the time-series light-splitting element 120 or at the light incident end of the uniform light square rod. How to set the diffuser. Further, the diffusion sheet may be set to remain stationary, or may be set to move in a preset manner, as described in the first embodiment.
  • the light source system 500 may further include a second light source (not shown).
  • the second light source is used to emit at least one color light (for example, at least one of red light and green light).
  • the light emitted by the two light sources and the excitation light transmitted through the first path and the second path are combined by the light combining element 180.
  • the setting method of the second light source can refer to the description in the first embodiment, which will not be repeated here.
  • the light source system 500 provided in this embodiment can achieve the beneficial effects as described in the first embodiment, and on this basis, the number of components in the light source system 500 can also be reduced, thereby helping to reduce the optical path of the light source system 500. Complexity and cost of controlling the light source system 500.
  • An embodiment of the present invention also provides a display device, which includes the light source system according to any one of the first to fifth embodiments.
  • the display device may include, but is not limited to, a projector, a display, etc.
  • the light source system is used to provide light source light for the display device. Since the uniform light effect of the light source system is improved, it is also beneficial to improve the display effect of the display device, such as increasing the brightness of the screen. Uniformity, etc.

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Abstract

一种光源系统（100）及一种显示装置。光源系统（100）包括：第一光源（110），用于发射激发光；时序分光元件（120），用于分时将激发光沿第一路径和不同于第一路径的第二路径出射，时序分光元件（120）还用于增大沿第一路径出射的激发光的发散角；匀光器件（130），用于将接收到的增大发散角后的沿第一路径出射的激发光进行匀光处理并出射；波长转换装置（140），用于将接收到的匀光处理后的激发光转换为受激光并出射，受激光与沿第二路径出射的激发光的合光作为光源系统（100）的光源光出射。

Description

光源系统及显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种光源系统及应用该光源系统的显示装置。
背景技术
随着投影显示技术的不断发展，投影产品的亮度需求越来越高。对于光源为激光荧光模式(以激发光激发色轮上的荧光粉产生受激光)的投影系统来说，若要实现高亮度，通常采用增加出射激发光(也即激光)的激光器的数量的方式。然而，激光器数量增加时，入射至色轮的激光功率也变大，激光的功率密度随之提升，则高功率密度的激光激发色轮上荧光粉造成荧光粉饱和问题越来越严重。为解决荧光粉饱和问题，进而提升光源光效，目前常用的方法是在激光光路中增加匀光器件，降低入射荧光轮的激光光斑的功率密度峰值。常用的匀光器件包括散射片、单复眼、光棒和双复眼。其中，散射片对光学扩展量的稀释程度比较大，并不适用于光学扩展量小的光源；单复眼的匀光效果不够好，并且对入射光角度非常敏感，系统容差太小；光棒匀光效果好，但是光棒长度一般较长，对于体积需求严格的产品并不适用；双复眼匀光效果好且尺寸小，实用性较高。
然而，在使用双复眼(包括多个复眼单元)匀光的情况下，一方面因激光光斑较小，为保证匀光效果，复眼单元尺寸也很小，小尺寸的复眼单元的结构导致匀光效果不理想，且导致双复眼整体制作精度要求较高，制作成本提升。
另一方面，激光相干性高，双复眼匀光后的激光光斑会出现明显的干涉现象，降低匀光效果。对于这种由激光相干性引起的匀光效果降低，仅仅依靠增大双复眼单元尺寸难以完全消除；更重要的是，复眼单元尺寸增大，会导致光束被复眼分割次数减少，复眼匀光效果变 差，存在难以同时提升匀光效果并消除干涉现象的问题。
发明内容
本发明一方面提供一种光源系统，包括：
第一光源，用于发射激发光；
时序分光元件，用于分时将所述激发光沿第一路径和不同于所述第一路径的第二路径出射，所述时序分光元件还用于增大沿所述第一路径出射的所述激发光的发散角；
匀光器件，用于将接收到的增大发散角后的沿所述第一路径出射的所述激发光进行匀光处理并出射；
波长转换装置，用于将接收到的匀光处理后的所述激发光转换为受激光并出射，所述受激光与沿所述第二路径出射的所述激发光的合光作为所述光源系统的光源光出射。
本发明另一方面提供一种显示装置，包括上述的光源系统。
本发明实施例提供的光源系统，应用于激光加荧光的光源结构中，光源系统包括出射激发光的第一光源、时序分光元件及匀光器件，激发光经时序分光元件增大发散角从而增大光斑面积，使得激发光入射至匀光器件时光斑足够大，有利于提升匀光元件的匀光效果。
附图说明
图1为实施例一提供的光源系统的结构示意图。
图2为图1中时序分光元件的平面结构示意图。
图3为图2中时序分光元件的第一光引导区的光路示意图。
图4为图2中时序分光元件的第二光引导区的光路示意图。
图5为实施例二提供的光源系统的结构示意图。
图6为图5中时序分光元件的第一光引导区的光路示意图。
图7为图5中时序分光元件的第二光引导区的光路示意图。
图8为实施例三提供的光源系统的结构示意图。
图9为实施例四提供的光源系统的结构示意图。
图10为图9中序分光元件的第一光引导区的光路示意图。
图11为实施例五提供的光源系统的结构示意图。
主要元件符号说明
Figure PCTCN2020086242-appb-000001
Figure PCTCN2020086242-appb-000002
如下具体实施方式将结合上述附图进一步说明本发明。
具体实施方式
实施例一
请参阅图1，本实施例提供的光源系统100，包括：
第一光源110，用于发射激发光。
时序分光元件120，用于分时将所述激发光沿第一路径和不同于所述第一路径的第二路径出射，所述时序分光元件还用于增大沿所述第一路径出射的所述激发光的发散角。
匀光器件130，用于将接收到的增大发散角后的沿所述第一路径出射的所述激发光进行匀光处理并出射。
波长转换装置140，用于将接收到的匀光处理后的所述激发光转换为受激光并出射，所述受激光与沿所述第二路径出射的所述激发光的合光作为所述光源系统的光源光出射。
第一光源110用于出射激发光，本实施例中，第一光源110为激光器，激发光为蓝色激光。当然，于其它实施例中，第一光源也可以为发光二极管等。
请继续参阅图1，本实施例中，光源系统100还包括设置于第一光源110与时序分光元件120之间的用于聚光的透镜151，光源系统100出射的激发光经透镜151后，入射至时序分光元件120。激发光为激光，其方向性好，发散角较小，因此入射至时序分光元件120时光斑较小。时序分光元件120用于增大其发散角，并将增大发散角后的激发光分时沿第一路径和第二路径出射。于其他实施例中，时序分光元件120仅增大沿第一路径出射的激发光的发散角，而不增大沿第二路径出射的激发光的发散角。
请同时参阅图1和图2，本实施例中，时序分光元件120为一包括相互拼接的第一光引导区121和第二光引导区122的圆盘结构，还 包括固定于时序分光元件120中心的第一驱动器123，第一驱动器123驱动时序分光元件120旋转，使得第一光引导区121和第二光引导区122交替位于激发光的光路上。第一光引导区121位于激发光的光路上时，激发光发散角增大且被引导至沿第一路径出射，第二光引导区122位于激发光的光路上时，激发光发散角增大且被引导至沿第二路径出射。
请参阅图3，第一光引导区121具有相对设置的第一入射面121a与第一出射面121b，第一入射面121a用于对接收到的光线进行散射，且第一入射面121a与第一出射面121b皆镀有高透射膜，用于透射接收到的光线。第一光引导区121位于激发光光路上时，激发光从第一入射面121a入射，被第一入射面121a散射，发散角增大，并从第一入射面121a透射，并经第一出射面121b透射出去。上述图3中所示的激发光的传输路径即为第一路径。
第二光引导区122具有第二入射面122a，第二光入射面为散射面，用于对激发光进行至少一次散射。
请参阅图4，本实施例中，第二入射面122a用于对激发光进行一次散射，具体的，第二入射面122a上镀有高反射膜。第二光引导区122位于激发光光路上时，激发光从第二入射面122a入射，被第二入射面122a散射，发散角增大，并被第二入射面122a反射。上述图4中激发光的传输路径即为第二路径。
于一扩展实施例中，第二入射面122a用于对激发光进行两次散射。具体的，第二光引导区122还包括与第二入射面122a相对设置的第一反射面122b，第二入射面122a上镀有高透射膜，第一反射面122b上镀有高反射膜。第二光引导区122位于激发光光路上时，激发光从第二入射面122a入射，被第二入射面122a散射，发散角增大，并被第二入射面122a透射，入射至第一反射面122b，再被第一反射面122b反射至第二入射面122a，经第二入射面122a第二次散射后透射至第二路径。在该扩展实施例中，激发光被两次散射，也即激发光发散角被增大两次，在实施例一的基础上，进一步增大了激发光发散角。
在光源系统100工作过程中，时序分光元件120处于旋转状态， 则在第一时段，第一光引导区121旋转至激发光的出射路径上，激发光被第一光引导区121引导沿第一路径出射，在第二时段，第二光引导区122旋转至激发光的出射路径上，激发光被第一光引导区121引导沿第二路径出射。本实施例中，时序分光元件120倾斜角度θ设置为45°，当然，于其他实施例中，倾斜角度θ也可以为其他角度，此处不作限定。
如上述的，本实施例中，时序分光元件120通过旋转使得第一光引导区121与第二光引导区122交替位于激发光光路上。于其他实施例中，也可采用其他方式实现第一光引导区121与第二光引导区122交替位于激发光光路上，例如，通过沿某一方向抽拉实现时序分光元件120中第一光引导区121与第二光引导区122交替位于激发光光路上。
本实施例中，匀光器件130为复眼透镜，具体的，为双复眼，其包括多个复眼单元131，匀光器件130利用各个复眼单元131对上述的平行光束进行匀光，通常，复眼单元131数量越多，匀光效果越好，也即从匀光器件130出射的光亮度均匀性越高。而可以理解的是，一个匀光器件130中，包括复眼单元131数量越多，意味着各个复眼单元131的尺寸越小，小尺寸结构的制作造成制作工艺难度增大，使难以实达到精度要求。由于激发光为激光，其光斑较小，若增大复眼单元131的尺寸以降低工艺难度，又易因为光斑覆盖的复眼单元131数量较少，光斑被各个复眼单元131切割次数减小造成匀光器件130匀光效果达不到要求。
因此本实施例中，通过时序分光元件120将激发光经过散射，增大其发散角，从时序分光元件120出射的激发光再经收光透镜152准直后以平行光束入射至匀光器件130，上述平行光束由激发光经过散射后得到，其在匀光器件130上形成的光斑面积大于激发光从第一光源110出射时的光斑面积，则即使为了降低制作工艺的难度而一定程度增大复眼单元131的尺寸，由于光斑面积变大，光斑仍然可以覆盖较多数量的复眼单元131，光斑可被多次分割，满足匀光器件130的匀光效果要求。并且，旋转的时序分光元件120也可同时弱化激发光 的干涉现象，匀光效果进一步提升。
于其他实施例中，上述的时序分光元件120不具备对光的散射功能，则，可采取在时序分光元件120之外独立设置散射片(图未示)的方式。具体的，该散射片设置于时序分光元件120与匀光器件130之间。进一步的，该散射片可以设置为保持静止，也可设置为以预设方式运动，以达到消除散斑的效果。上述预设方式的运动可以包括但不仅限于圆周运动、谐振运动、平动等。
请再参阅图1，光源系统100还包括设置于匀光器件130与时序分光元件120之间的收光透镜152，被第一光引导区121引导沿第一路径出射的激发光发散角增大，由收光透镜152对其进行汇聚准直，则收光透镜152出射的激发光为平行光束，由于该平行光束为经第一光引导区121对激发光进行散射作用后形成，则该平行光束形成的光斑面积大于激发光从第一光源110出射时的光斑面积。
经时序分光元件120增大发散角后的激发光光束的角度分布连续，也即光束的入射角的角度分布是连续的，即在匀光器件130可以接受的入射角范围内，每一个角度作为入射角都有相对应的光线的存在。并且，该角度分布连续的激发光，经收光透镜152准直后，光束面分布变大且面分布连续，也即，经收光透镜152准直后的激发光的光束投影面中，单位面积内，各个光线之间的入射角差异较均匀。则，入射至匀光器件130中光线的入射角整体差异较小，有利于提高匀光器件130的匀光效果。
本实施例中，因为匀光器件130为双复眼，双复眼中两个复眼单元131其中一个设置在另一个的焦点位置，通过收光透镜152将从时序分光元件120出射的激发光准直为平行光束，有利于使经过其中一复眼单元131汇聚的光可以打在另一复眼单元131上，进而有利于提高双复眼的匀光效果。
请继续参阅图1，光源系统100还包括反射片160、透镜153及分光片170，反射片160及透镜153用于共同引导经匀光器件130匀光后的激发光至分光片170，当然，于其他实施例中，也可采用其他方式引导激发光至分光片170。
分光片170用于反射激发光并用于透射波长转换装置140发射的受激光。本实施例中，波长转换装置140为色轮，包括第二驱动器141，第二驱动器141可驱动波长转换装置140旋转，波长转换装置140上设置有黄色荧光粉，激发光为蓝色激光，蓝色激光激发黄色荧光粉可被转换为黄色荧光(也即上述受激光)出射，则本实施例中，分光片170用于反射蓝色激光并透射黄色荧光。
光源系统100还包括透镜154、透镜155、透镜156、光收集系统157及合光元件180。于一实施例中，合光元件180可采用二向色片，对不同波长的光选择透过；于另一实施例中，合光元件180也可采用区域镀膜片，在不同区域对光进行不同方式引导。本实施例中，合光元件180为二向色片。
具体的，透镜154用于汇聚从分光片170出射的受激光并将其引导至合光元件180，且沿第二路径出射的激发光经透镜155和透镜156共同引导至合光元件180。由于激发光光斑面积较小，合光元件180中心较小区域用于反射激发光，而从分光片170出射的受激光则面积较大，其被合光元件180除中心区域之外的其他区域透射。经合光元件180反射的激发光与经合光元件180透射的受激光经合光元件180合光并出射，受激光在合光元件180位置成中间像。
本实施例中，光源系统100还包括中继透镜158和匀光系统190，从合光元件180出射的激发光与受激光的合光发散角较大，通过中继透镜158对合光进行汇聚并引导至匀光系统190，由匀光系统190对合光进行匀光使之亮度分布均匀，匀光系统190可以为匀光棒、复眼等。匀光后的合光作为光源系统100的光源光出色，其中，光源光包括但不限于用作照明或显示。
本实施例提供的光源系统100，应用于激光加荧光的光源结构中，光源系统100包括出射激发光的第一光源110、时序分光元件120及匀光器件130，激发光经时序分光元件120增大发散角从而增大光斑，使得激发光入射至匀光器件130时光斑足够大，即使为了降低制作工艺的难度而一定程度增大复眼透镜中复眼单元131的尺寸，由于光斑面积变大，光斑仍然可以覆盖较多数量的复眼单元131，光斑可被多 次分割，满足匀光器件130的匀光效果要求。并且，时序分光元件120分时将增大发散角后的所述激发光沿第一路径和不同于所述第一路径的第二路径出射，可弱化激发光的干涉现象，匀光效果进一步提升。
请同时参阅图1～图4，作为本实施例的扩展，光源系统100还可包括第二光源(图未示)，第二光源用于出射至少一种颜色光(例如红光、绿光中至少一种)，第二光源出射的光与经第一路径及第二路径传输的激发光被合光元件180合光。
其中，第二光源可设置于与第一光源110位于时序分光元件120同侧，则当时序分光元件120的第二光引导区122位于第二光源的光出射路径上时，第二光源开启，其出射的光与第一光源110出射的激发光皆经第二路径入射至合光元件180；第二光源也可设置于与第一光源110位于时序分光元件120不同侧，则当时序分光元件120的第二光引导区122位于第二光源的光出射路径上时，第二光源出射的光被第二光引导区122透射或反射并沿第二路径入射至合光元件180。
通过设置第二光源，有利于提高从合光元件180出射的光的图像显示色域。
实施例二
请参阅图5，本实施例提供的光源系统200，与实施例一的主要区别在于，时序分光元件120的结构不同，第一光源110与透镜151的设置位置不同，以下仅对与实施例一的区别部分进行详细描述。
本实施例中，第一光源110、透镜151及匀光器件130设置于时序分光元件120的同侧。
请同时参阅图6～图7，本实施例中，时序分光元件120包括第一光引导区121和第二光引导区122。
请参阅图6，第一光引导区121具有第三入射面121c、光引导面121d，其上镀有高反射膜，其中，第三入射面121c与光引导面121d相对设置。第三入射面121c用于散射激发光，激发光从第三入射面121c入射，经第三入射面121c散射，发散角增大，并被第三入射面121c透射，入射至光引导面121d，被光引导面121d再反射至第三入射面121c，被第三入射面121c再次散射，发散角再次增大后从第三 入射面121c透射，如图6所示的光路即为上述的第一路径。
请参阅图7，第二光引导区122具有相对设置的第四入射面122c及第三出射面122d，第四入射面122c用于透射并散射激发光，第三出射面122d上镀有高透射膜，用于透射激发光。激发光从第四入射面122c入射，被第四入射面122c散射，发散角增大，并被第四入射面122c透射至第三出射面122d，被第三出射面122d透射出去，图7所示光路即为上述的第二路径。
应当理解，本实施例中提供的光源系统200，可以实现如实施例一中所述的所有有益效果。并且在此基础上，本实施例中，入射至第一光引导区121沿第一路径出射的激发光被时序分光元件120经过两次散射再出射，相较于实施例一进一步增大了激发光的发散角，使得从时序分光元件120沿第一路径出射的激发光光斑进一步增大，提升了匀光器件130的匀光效果；另外，蓝激光(本实施例中激发光)反射率高，时序分光元件120反射蓝激光时造成蓝激光损耗较小，提升了光利用率，进一步减小了对激发荧光粉时产生的受激光的色坐标的影响。
作为本实施例的一扩展实施例，光源系统200还可包括第二光源(图未示)，第二光源用于出射至少一种颜色光(例如红光、绿光中至少一种)，第二光源出射的光与经第一路径及第二路径传输的激发光被合光元件180合光。通过设置第二光源，有利于提高从合光元件180出射的光的图像显示色域。其中，第二光源的设置方式可参考实施例一中所述，此处便不再赘述。
实施例三
请参阅图8，本实施例提供的光源系统300，与实施例二的主要区别在于，匀光器件130包括分离设置的两个单复眼透镜132a和132b，以下仅对与实施例二的区别部分进行详细描述。
如实施例二中的双复眼，其厚度与复眼单元131的焦距相关，而复眼单元131尺寸越大复眼单元131焦距越长，双复眼厚度也就越大。因此，增加双复眼的复眼单元131尺寸的同时，双复眼厚度也会越来越厚，制作工艺难度增大，成本提升。因此本实施例中，考虑上述因 素，在双复眼的复眼单元131尺寸变大的情况下，将匀光器件130设置为包括分离设置的两个单复眼透镜，分别为单复眼透镜132a和单复眼透镜132b，由于本实施例中，复眼单元131尺寸变大，则单复眼透镜132a和单复眼透镜132b在对位时，对位精度要求变小，则易于实施，且可降低成本，相对于实施例二，具有较高的实用性。
应当理解，本实施例提供的光源系统300，也可实现如实施例二中所述的所有有益效果。
实施例四
请参阅图9，本实施例提供的光源系统400，与实施例三的区别主要在于，时序分光元件120结构不同且光源系统400进一步包括第二光源410、二向色片420及区域镀膜片430。以下仅对与实施例三的区别部分进行详细描述。
第二光源410用于出射第一颜色光和第二颜色光，本实施例中，第一颜色光与第二颜色光分别为红色激光与绿色激光。二向色片420用于透射第一光源110发出的激发光，并用于反射第二光源410发出的第一颜色光和第二颜色光。于其他实施例中，第二光源410可设置为仅出射一种颜色光，例如仅出射红色或绿色光；于另一实施例中，第二光源410可设置出射多种颜色的光，以得到更宽色域，提升显示效果。
请一并参阅图9和图10，本实施例中，时序分光元件120的第一光引导区121中，光引导面121d镀有二向色膜，用于将从第三入射面121c入射的激发光再反射至第三入射面121c，并透射第一颜色光和第二颜色光。激发光从第一光引导区121出射后的传输路径如实施例三中所述，经光引导面121d透射的第一颜色光和第二颜色光经透镜155和透镜156共同引导至区域镀膜片430。激发光入射至第二光引导区122时的传输光路也如实施例三中所述，即经透镜155和透镜156共同引导至区域镀膜片430。
本实施例中，光源系统400中以区域镀膜片430取代实施例三光源系统300中的合光元件180，区域镀膜片430光入射面431的中心区域镀高反射膜，经透镜155和透镜156聚光后的激发光、第一颜色 光及第二颜色光皆入射至该中心区域被区域镀膜片430反射；区域镀膜片430其余区域镀高透射膜，从波长转换装置140出射的受激光入射至区域镀膜片430后被透射，其与被反射的激发光、第一颜色光及第二颜色光合光作为光源系统400的光源光出射。
应当理解，本实施例提供的光源系统400，可实现如实施例三中所述的所有有益效果，在此基础上，由于增设了发射第一颜色光和第二颜色光的第二光源410，扩展了光源光的色域范围。
实施例五
请参阅图11，本实施例提供的光源系统500，与实施例一的主要区别在于：本实施例中，匀光器件130为匀光方棒，且光源系统500不包括收光透镜152。
本实施例中，匀光器件130为匀光方棒，由于时序分光元件120将激发光经过散射，增大了激发光的发散角，则入射至匀光方棒时的激发光光斑面积相较于激发光从第一光源110出射时的光斑面积要大，有利于提升匀光效果。由于匀光方棒对入射的光的角度要求相较于双复眼透镜要低，因此本实施例中可以省去收光透镜152，也可以得到较好的匀光效果，当然，匀光器件130为匀光方棒时，同样也可以使用收光透镜152，一进一步提高匀光效果。
于其他实施例中，上述的时序分光元件120不具备对光的散射功能，则，可采取在时序分光元件120之外独立设置散射片(图未示)或在匀光方棒的光入射端设置散射片的方式。进一步的，该散射片可以设置为保持静止，也可设置为以预设方式运动，具体如实施例一中所述。
作为本实施例的一扩展实施例，光源系统500还可包括第二光源(图未示)，第二光源用于出射至少一种颜色光(例如红光、绿光中至少一种)，第二光源出射的光与经第一路径及第二路径传输的激发光被合光元件180合光。通过设置第二光源，有利于提高从合光元件180出射的光的图像显示色域。其中，第二光源的设置方式可参考实施例一中所述，此处便不再赘述。
应当理解，本实施例提供的光源系统500，可以实现如实施例一 所述的有益效果，并且在此基础上，还可减少光源系统500中的元件数量，进而有利于减小光源系统500光路复杂度及控制光源系统500成本。
本发明实施例还提供一种显示装置，显示装置包括如实施例一～五任一项所述的光源系统。显示装置可包括但不仅限于投影仪、显示器等，光源系统用于为显示装置提供光源光，由于光源系统的匀光效果有所提升，相应也有利于提升显示装置的显示效果，例如提升画面亮度均匀度等。
应当理解，如上述的显示装置，可实现如实施例一～五所述的所有有益效果，此处不再赘述。
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本发明，而并非用作为对本发明的限定，只要在本发明的实质精神范围之内，对以上实施例所作的适当改变和变化都落在本发明要求保护的范围之内。

Claims (14)

  1. 一种光源系统，其特征在于，包括：
    第一光源，用于发射激发光；
    时序分光元件，用于分时将所述激发光沿第一路径和不同于所述第一路径的第二路径出射，所述时序分光元件还用于增大沿所述第一路径出射的所述激发光的发散角；
    匀光器件，用于将接收到的增大发散角后的沿所述第一路径出射的所述激发光进行匀光处理并出射；
    波长转换装置，用于将接收到的匀光处理后的所述激发光转换为受激光并出射，所述受激光与沿所述第二路径出射的所述激发光的合光作为所述光源系统的光源光出射。
  2. 如权利要求1所述的光源系统，其特征在于，所述时序分光元件包括第一光引导区和第二光引导区，所述第一光引导区和所述第二光引导区交替位于所述激发光的光路上；
    所述第一光引导区将入射的所述激发光的发散角增大且引导至沿所述第一路径出射，所述第二光引导区将所述激发光发散角增大且引导至沿所述第二路径出射。
  3. 如权利要求2所述的光源系统，其特征在于：
    所述第一光引导区具有相对设置的第一入射面与第一出射面，所述第一入射面为散射面，所述第一入射面与所述第一出射面皆用于透射所述激发光；
    所述第二光引导区具有第二入射面，所述第二入射面用于对所述激发光进行至少一次散射。
  4. 如权利要求3所述的光源系统，其特征在于，所述第一入射面与所述第一出射面皆镀高透射膜，所述第二入射面镀高反射膜。
  5. 如权利要求2所述的光源系统，其特征在于：
    所述第一光引导区具有相对设置的第三入射面及光引导面，所述第三入射面用于散射所述激发光，所述光引导面用于将从所述第三入射面入射的所述激发光再反射至所述第三入射面；
    所述第二光引导区具有相对设置的第四入射面及第二出射面，所述第四入射面用于透射并散射所述激发光，所述第二出射面用于透射所述激发光。
  6. 如权利要求5所述的光源系统，其特征在于：
    所述光引导面镀高反射膜，所述第二出射面镀高透射膜。
  7. 如权利要求2所述的光源系统，其特征在于：所述光源系统还包括第二光源，所述第二光源用于出射第一光，所述时序分光元件将所述第一光的发散角增大并引导至沿所述第二路径出射。
  8. 如权利要求7所述的光源系统，其特征在于，所述第二光源出射的第一光包括第一颜色光和第二颜色光；
    所述第一光引导区将入射的所述第一颜色光和所述第二颜色光进行散射并引导至第二路径出射。
  9. 如权利要求5所述的光源系统，其特征在于，所述光引导面镀二向色膜。
  10. 如权利要求1所述的光源系统，其特征在于，还包括设置于所述匀光器件与所述波长转换装置之间的分光片；
    所述分光片用于反射匀光处理后的所述激发光并透射所述波长转换装置出射的受激光。
  11. 如权利要求1所述的光源系统，其特征在于，还包括合光器件；
    所述合光器件用于反射沿所述第二路径出射的所述激发光并透射所述波长转换装置出射的受激光以将所述激发光与所述受激光合光。
  12. 如权利要求1～11任一项所述的光源系统，其特征在于，所述匀光器件为双复眼透镜、单复眼透镜或者匀光方棒。
  13. 如权利要求12所述的光源系统，其特征在于，所述光源系统还包括设置于所述时序分光元件与所述匀光器件之间的收光透镜，所述收光透镜用于将从所述时序分光元件出射的沿所述第一路径出射的激发光汇聚为平行光束入射至所述匀光器件。
  14. 一种显示装置，其特征在于，包括如权利要求1-13所述的光源系统。
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