WO2021259284A1

WO2021259284A1 - Projection light source, and projector

Info

Publication number: WO2021259284A1
Application number: PCT/CN2021/101615
Authority: WO
Inventors: 颜珂
Original assignee: 青岛海信激光显示股份有限公司
Priority date: 2020-06-22
Filing date: 2021-06-22
Publication date: 2021-12-30
Also published as: CN115803678A

Abstract

A projection light source (10) and a projector. A light combining lens (103) in the projection light source (10) comprises a reflection region (1032) and two transmission regions (1031a, 1031b) respectively located at two sides of the reflection region (1032). A fluorescent wheel (105) comprises a first region (1051) and a second region (1052), and the second region (1052) is provided with a light diffusion portion. A laser (101) is used to emit multiple laser beams toward the two transmission regions (1031a, 1031b) of the light combining lens (103), such that laser light is transmitted and sent to a converging lens (104). The converging lens (104) converges the laser light toward the fluorescent wheel (105). The fluorescent wheel (105) is configured to rotate about a rotation axis (Z). While the fluorescent wheel (105) is rotating, different regions of the fluorescent wheel (105) receive irradiation of the converged laser light. The first region (1051) is excited to emit fluorescent light which passes through the converging lens (104) and is sent to the reflection region (1032). The light diffusion portion of the second region (1052) diffuses the converged laser light, and the diffused laser light passes through the converging lens (104) and is sent to the reflection region (1032). The reflection region (1032) reflects incident light along a target direction (X). The projection light source (10) is compact and provides uniform light emission, thereby facilitating image projection of the projector.

Description

投影光源和投影设备Projection light source and projection equipment

相关申请的交叉引用Cross-references to related applications

本申请要求在2020年6月22日提交中国专利局、申请号为202010577387.2，发明名称为“光源组件和投影设备”的中国专利申请的，以及在2021年6月18日提交中国专利局、申请号为202110679835.4，发明名称为“投影光源和投影设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application requires a Chinese patent application filed with the Chinese Patent Office with an application number of 202010577387.2 and an invention title of "Light Source Assembly and Projection Equipment" on June 22, 2020, and a Chinese patent application filed with the Chinese Patent Office on June 18, 2021. The priority of the Chinese patent application with the number 202110679835.4 and the invention title is "Projection Light Source and Projection Equipment", the entire content of which is incorporated into this application by reference.

技术领域Technical field

本申请涉及光电技术领域，特别涉及一种投影光源和投影设备。This application relates to the field of optoelectronic technology, and in particular to a projection light source and projection equipment.

背景技术Background technique

随着科技的不断发展，投影设备越来越多的应用于人们的工作和生活中。目前，投影设备主要包括光源***、光机***和镜头，光源***位于光机***的入光侧，镜头位于光机***的出光侧，光源***出射光束至光机***，经光机***对该光束进行处理后出射至镜头，以便于镜头能够出射光束至投影屏幕，进而在投影屏幕上实现画面的显示。With the continuous development of science and technology, more and more projection equipment is used in people's work and life. At present, projection equipment mainly includes a light source system, an optomechanical system and a lens. The light source system is located on the light entrance side of the optomechanical system, the lens is located on the light exit side of the optomechanical system, and the light source system emits light beams to the optomechanical system. After the light beam is processed, it is emitted to the lens, so that the lens can emit the light beam to the projection screen, and then realize the image display on the projection screen.

相关技术中，对于投影设备中投影光源的小型化和合光品质要求越来越高。In the related art, the requirements for miniaturization and light-combining quality of the projection light source in the projection device are getting higher and higher.

发明内容Summary of the invention

本申请实施例一方面，提供了一种投影光源，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括反射区以及分别位于所述反射区两侧的两个透射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；In one aspect of the embodiments of the present application, a projection light source is provided. The projection light source includes: a laser, a light combining lens, a condensing lens, and a fluorescent wheel; Two transmissive areas; the fluorescent wheel includes a first area and a second area, and a light diffusion portion is provided on the second area;

所述激光器用于射出多束激光，所述多束激光射向所述两个透射区，所述透射区用于将射入的激光透射向所述会聚透镜；The laser is used to emit multiple laser beams, the multiple laser beams are directed to the two transmission areas, and the transmission area is used to transmit the incident laser light to the condensing lens;

所述会聚透镜用于将射入的激光会聚向所述荧光轮；The condensing lens is used to converge the incident laser light toward the fluorescent wheel;

所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；The fluorescent wheel is configured to rotate around a rotating shaft, and during the rotation of the fluorescent wheel, different areas of the fluorescent wheel are irradiated by the focused laser;

当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；When the condensed laser light is directed to the first area, the first area is excited to emit fluorescence, so that the fluorescence passes through the condensing lens and is directed toward the reflection area;

当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；When the condensed laser light is directed to the second area, the light diffusing part diffuses the converged laser light so that the diffused laser light passes through the condensing lens and is directed to the reflection area;

所述反射区用于沿目标方向反射射入的光。The reflection area is used to reflect the incident light along the target direction.

另一方面，提供了一种投影设备，所述投影设备包括：上述的投影光源，以及光阀和镜头；In another aspect, a projection device is provided, the projection device comprising: the above-mentioned projection light source, a light valve and a lens;

所述投影光源用于向所述光阀发出激光，所述光阀用于将射入的激光进行调制后射向所述镜头，所述镜头用于对射入的激光进行投射以形成投影画面。The projection light source is used to emit laser light to the light valve, the light valve is used to modulate the incident laser light and then directed to the lens, and the lens is used to project the incident laser light to form a projection image .

附图说明Description of the drawings

为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the technical solutions in the embodiments of the present application more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

图1是相关技术提供的一种投影光源的结构示意图；Fig. 1 is a schematic structural diagram of a projection light source provided by related technologies;

图2是本申请实施例提供的一种投影光源的结构示意图；FIG. 2 is a schematic structural diagram of a projection light source provided by an embodiment of the present application;

图3是本申请实施例提供的一种荧光轮的结构示意图；Fig. 3 is a schematic structural diagram of a fluorescent wheel provided by an embodiment of the present application;

图4是本申请实施例提供的另一种投影光源的结构示意图；4 is a schematic structural diagram of another projection light source provided by an embodiment of the present application;

图5是本申请实施例提供的再一种投影光源的结构示意图；FIG. 5 is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application;

图6是本申请实施例提供的又一种投影光源的结构示意图；FIG. 6 is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application;

图7是本申请实施例提供的一种投影设备的结构示意图。Fig. 7 is a schematic structural diagram of a projection device provided by an embodiment of the present application.

具体实施方式detailed description

为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。In order to make the purpose, technical solutions, and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

图1是相关技术提供的一种投影光源的结构示意图。如图1所示，该投影光源包括：激光器001、二向色镜002、第一准直透镜组003、荧光轮004、中继回路***以及光导管005。二向色镜002、第一准直透镜组003和荧光轮004位于激光器001的出光侧，且沿激光器001的出光方向依次排布。中继回路***包括：第二准直透镜组006、第一反射镜片007、第一准直透镜008、第二反射镜片009、第二准直透镜010、第三反射镜片011和第三准直透镜012。其中，第二准直透镜组006和第一反射镜片007位于荧光轮004远离激光器001的一侧，且沿激光器001的出光方向(如图1中的y方向)依次排布。第一反射镜片007、第一准直透镜008和第二反射镜片009沿目标方向(如图1中的x方向)的反方向依次排布，该目标方向垂直于激光器001的出光方向。第二反射镜片009、第二准直透镜010和第三反射镜片011沿激光器001的出光方向的反方向依次排布。第三反射镜片011、第三准直透镜012、二向色镜002以及光导管005沿目标方向依次排布，且二向色镜002朝光导管005倾斜。该光导管005位于投影光源的出光口。Fig. 1 is a schematic diagram of the structure of a projection light source provided by the related art. As shown in FIG. 1, the projection light source includes: a laser 001, a dichroic mirror 002, a first collimating lens group 003, a fluorescent wheel 004, a relay circuit system, and a light pipe 005. The dichroic mirror 002, the first collimating lens group 003, and the fluorescent wheel 004 are located on the light-emitting side of the laser 001, and are arranged in sequence along the light-emitting direction of the laser 001. The relay circuit system includes: a second collimating lens group 006, a first reflecting lens 007, a first collimating lens 008, a second reflecting lens 009, a second collimating lens 010, a third reflecting lens 011, and a third collimating lens. Lens 012. Wherein, the second collimating lens group 006 and the first reflecting lens 007 are located on the side of the fluorescent wheel 004 away from the laser 001, and are arranged in sequence along the light emitting direction of the laser 001 (the y direction in FIG. 1). The first reflecting lens 007, the first collimating lens 008, and the second reflecting lens 009 are arranged in sequence along the direction opposite to the target direction (the x direction in FIG. 1), which is perpendicular to the light emitting direction of the laser 001. The second reflective lens 009, the second collimating lens 010, and the third reflective lens 011 are arranged in sequence along the direction opposite to the direction of light emission of the laser 001. The third reflecting lens 011, the third collimating lens 012, the dichroic mirror 002, and the light pipe 005 are arranged in sequence along the target direction, and the dichroic mirror 002 is inclined toward the light pipe 005. The light pipe 005 is located at the light exit of the projection light source.

激光器001可以发出蓝色激光，该二向色镜002可以透过蓝光。激光器001发出的该蓝色激光可以穿过二向色镜002和第一准直透镜组003射向荧光轮004。该荧光轮004包括荧光区和透射区(图1中未示出)，该荧光区具有荧光材料，该荧光材料可以在蓝色激光的照射下发出荧光(如红色荧光和绿色荧光)。该荧光轮004可以绕平行于激光器001的出光方向的转轴转动，荧光轮004在转动时蓝色激光可以射向该荧光轮004的不同区域。当该蓝色激光射向荧光轮004的透射区时，该蓝色激光可以穿过该透射区以及第二准直透镜组006射向第一反射镜片007，进而被第一反射镜片007反射以穿过第一准直透镜008射向第二反射镜片009。接着该蓝色激光可以被第二反射镜片009反射以穿过第二准直透镜010射向第三反射镜片011，且被第三反射镜片011反射以穿过第三准直透镜012以及二向色镜002射向光导管005。随着荧光轮004的转动，当激光器001发出的蓝色激光射向荧光轮004的荧光区时，该蓝色激光可以激发该荧光区的荧光材料向二向色镜002发出荧光。该二向色镜002还可以反射红光和绿光，故该荧光可以在二向色镜002上再次反射以射向光导管005。如此一来，光导管005可以接收荧光和蓝色激光，该荧光和蓝色激光可以在光导管005的作用下混合，进而会聚透镜可以将混合后的光线用于投影设备的投射。The laser 001 can emit blue laser light, and the dichroic mirror 002 can transmit blue light. The blue laser light emitted by the laser 001 can pass through the dichroic mirror 002 and the first collimating lens group 003 to be directed toward the fluorescent wheel 004. The fluorescent wheel 004 includes a fluorescent area and a transmission area (not shown in FIG. 1). The fluorescent area has a fluorescent material that can emit fluorescence (such as red fluorescence and green fluorescence) under the irradiation of blue laser light. The fluorescent wheel 004 can rotate around a rotation axis parallel to the light-emitting direction of the laser 001, and the blue laser light can be directed to different areas of the fluorescent wheel 004 when the fluorescent wheel 004 rotates. When the blue laser light is directed to the transmission area of the fluorescent wheel 004, the blue laser light can pass through the transmission area and the second collimating lens group 006 and be directed to the first reflection lens 007, and then be reflected by the first reflection lens 007. It passes through the first collimating lens 008 and is directed toward the second reflecting lens 009. Then the blue laser light can be reflected by the second reflective lens 009 to pass through the second collimating lens 010 to the third reflective lens 011, and be reflected by the third reflective lens 011 to pass through the third collimating lens 012 and the two-way The color mirror 002 is directed toward the light pipe 005. With the rotation of the fluorescent wheel 004, when the blue laser light emitted by the laser 001 is directed to the fluorescent area of the fluorescent wheel 004, the blue laser can excite the fluorescent material in the fluorescent area to emit fluorescence to the dichroic mirror 002. The dichroic mirror 002 can also reflect red and green light, so the fluorescence can be reflected on the dichroic mirror 002 again to be directed toward the light pipe 005. In this way, the light pipe 005 can receive fluorescence and blue laser light, and the fluorescence and blue laser light can be mixed under the action of the light pipe 005, and the condensing lens can use the mixed light for the projection of the projection device.

但是，相关技术中的该投影光源的体积较大，本申请以下实施例提供了一种投影光源，该投影光源的体积较小，且该投影光源射出的激光的均匀性较高，有利于投影设备的投影画面的显示。However, the volume of the projection light source in the related art is relatively large. The following embodiments of the present application provide a projection light source. The volume of the projection light source is relatively small, and the uniformity of the laser light emitted by the projection light source is relatively high, which is beneficial to projection. The display of the projection screen of the device.

图2是本申请实施例提供的一种投影光源的结构示意图。如图2所示，该投影光源10可以包括：激光器101、合光镜片103、会聚透镜104和荧光轮105。Fig. 2 is a schematic structural diagram of a projection light source provided by an embodiment of the present application. As shown in FIG. 2, the projection light source 10 may include: a laser 101, a light combining lens 103, a condensing lens 104 and a fluorescent wheel 105.

合光镜片103包括反射区以及分别位于该反射区两侧的两个透射区，如合光镜片103包括第一透射区1031a、第二透射区1031b、反射区1032，第一透射区1031a、反射区1032和第二透射区1031b可以沿合光镜片的延伸方向依次排布。荧光轮105包括第一区和第二区，该第二区上设置有光扩散部(图2中未标出第一区、第二区及光扩散部)，荧光轮105不设置有透光区。该第一区可以为荧光区，该第二区可以为反射区。该第一区可以在激光的照射下被激发出荧光，该第二区可以对射入的激光进行扩散，且反射射入的激光。The light combining lens 103 includes a reflection area and two transmission areas located on both sides of the reflection area. For example, the light combining lens 103 includes a first transmission area 1031a, a second transmission area 1031b, a reflection area 1032, a first transmission area 1031a, a reflection area The zone 1032 and the second transmission zone 1031b may be arranged in sequence along the extension direction of the light combining lens. The fluorescent wheel 105 includes a first area and a second area. The second area is provided with a light diffusion portion (the first area, the second area, and the light diffusion portion are not marked in FIG. 2), and the fluorescent wheel 105 is not provided with light-transmitting parts. Area. The first area may be a fluorescent area, and the second area may be a reflective area. The first area can be excited to fluoresce under the irradiation of laser light, and the second area can diffuse the incident laser light and reflect the incident laser light.

激光器101、合光镜片103、会聚透镜104和荧光轮105可以沿辅助方向(如图2中的y方向)依次排布。激光器101可以射出多束激光，该多束激光可以射向合光镜片103中的两个透射区，每个透射区可以将射入的激光透射向会聚透镜104。可选地，从该两个透射区射出的激光并不经过会聚透镜104的光轴。可选地，分别从所述两个透射区射出的两束激光在会聚透镜104上形成的光斑，可以关于会聚透镜104的光轴h对称，或者也可以不关于该光轴h对称，本申请实施例不做限定。The laser 101, the light combining lens 103, the condensing lens 104, and the fluorescent wheel 105 may be sequentially arranged along the auxiliary direction (the y direction in FIG. 2). The laser 101 can emit multiple laser beams, and the multiple laser beams can be directed to two transmission areas in the light combining lens 103, and each transmission area can transmit the incident laser light to the condensing lens 104. Optionally, the laser light emitted from the two transmission regions does not pass through the optical axis of the condensing lens 104. Optionally, the light spots formed on the condensing lens 104 by the two laser beams respectively emitted from the two transmission regions may be symmetrical about the optical axis h of the condensing lens 104, or may not be symmetrical about the optical axis h. The embodiment is not limited.

示例地，激光器101发出的多束激光包括：第一激光束L1和第二激光束L2。该第一激光束L1射向第一透射区1031a，并穿过第一透射区1031a射向会聚透镜104；该第二激光束L2射向第二透射区1031b，并穿过第二透射区1031b射向会聚透镜104。该第一激光束L1在会聚透镜104上形成的光斑与第二激光束L2在会聚透镜104上形成的光斑，关于会聚透镜104的光轴对称。换言之，会聚透镜104上第一激光束L1照射的镜面位置与第二激光束L2照射的镜面位置，关于会聚透镜104的光轴h对称。Illustratively, the multiple laser beams emitted by the laser 101 include: a first laser beam L1 and a second laser beam L2. The first laser beam L1 is directed to the first transmission area 1031a, and passes through the first transmission area 1031a to the condensing lens 104; the second laser beam L2 is directed to the second transmission area 1031b, and passes through the second transmission area 1031b It is directed to the converging lens 104. The spot formed by the first laser beam L1 on the condenser lens 104 and the spot formed by the second laser beam L2 on the condenser lens 104 are symmetrical about the optical axis of the condenser lens 104. In other words, the position of the mirror surface irradiated by the first laser beam L1 and the position of the mirror surface irradiated by the second laser beam L2 on the condensing lens 104 are symmetrical about the optical axis h of the condensing lens 104.

会聚透镜104可以将射入的激光会聚向荧光轮105。荧光轮105可以绕转轴Z旋转，在荧光轮105的旋转过程中，荧光轮105中的不同区接受会聚后的激光(也即是从会聚透镜104射出的激光)的照射。当会聚后的激光射向荧光轮105的第一区时，该第一区被激发出荧光，该荧光的颜色与射入的荧光轮105的激光的颜色不同。该荧光可以穿过会聚透镜104射向合光镜片103，如射向合光镜片103中的反射区。当会聚后的激光射向荧光轮105中的第二区时，该第二区上设置的光扩散部可以对会聚后的激光进行扩散，进而扩散后的激光可以再次穿过会聚透镜104射向合光镜片103，如射向合光镜片103的反射区。合光镜片103的反射区可以沿目标方向反射由会聚透镜104射向该反射区的光；也即该反射区可以将由会聚透镜104射向该反射区的激光和荧光均沿目标方向反射，以实现该激光和荧光的混光。The condensing lens 104 can converge the incident laser light toward the fluorescent wheel 105. The fluorescent wheel 105 can rotate around the rotation axis Z. During the rotation of the fluorescent wheel 105, different areas of the fluorescent wheel 105 are irradiated by the focused laser light (that is, the laser light emitted from the condensing lens 104). When the concentrated laser light is directed to the first area of the fluorescent wheel 105, the first area is excited to emit fluorescence, and the color of the fluorescent light is different from the color of the laser light incident on the fluorescent wheel 105. The fluorescence can pass through the condensing lens 104 and be directed to the light combining lens 103, such as to the reflection area of the light combining lens 103. When the condensed laser light is directed to the second area of the fluorescent wheel 105, the light diffusing part provided on the second area can diffuse the converged laser light, and then the diffused laser light can pass through the condensing lens 104 again and be directed toward The light-combining lens 103, for example, is directed toward the reflection area of the light-combining lens 103. The reflection area of the light combining lens 103 can reflect the light emitted from the condensing lens 104 to the reflection area along the target direction; that is, the reflection area can reflect the laser and fluorescence emitted from the condensing lens 104 to the reflection area along the target direction to Realize the mixing of the laser and fluorescent light.

本申请实施例中，辅助方向与目标方向相交。图2以本申请实施例以辅助方向与目标方向垂直为例，可选地，该辅助方向与目标方向的夹角也可以为钝角或锐角。图2以激光器射出的激光的束数为2，每束激光射向一个透射区为例，可选地，激光器射出的激光的束数也可以多于2，可以存在激光器射出的多束激光射向同一个透射区。可选地，激光器可以包括多排发光芯片，激光器发出的每束激光可以由一排或多排发光芯片发出。In the embodiment of the present application, the auxiliary direction intersects the target direction. Fig. 2 takes the embodiment of the present application where the auxiliary direction is perpendicular to the target direction as an example. Optionally, the angle between the auxiliary direction and the target direction may also be an obtuse angle or an acute angle. Figure 2 takes the number of laser beams emitted by the laser as 2, and each laser beam is directed to a transmission area as an example. Optionally, the number of laser beams emitted by the laser can be more than 2, and there may be multiple laser beams emitted by the laser. To the same transmission area. Optionally, the laser may include multiple rows of light-emitting chips, and each laser beam emitted by the laser may be emitted by one or more rows of light-emitting chips.

需要说明的是，由于荧光轮105上的第一区在激光的激发下发出荧光时，该第一区中被激光照射的区域向各个方向发光，而荧光轮105远离会聚透镜104的一侧不透光，故第一区中被激光照射的区域的发光角度可以大致在0～180度范围内，该区域射出荧光时类似朗伯体。第一区发出的荧光在会聚透镜上形成的光斑可以接近于覆盖会聚透镜的整个镜面。本申请实施例中，第二区上设置有光扩散结构，如此激光在射向第二区后，该激光被第二区反射且被光扩散结构扩散，该激光的出射角度范围相对于入射角度范围增大。激光在射向第二区后可以朝较大的范围出射，以射向会聚透镜，此时该第二区上被激光照射的位置也相当于一个类似朗伯体的点光源。可选地，该激光经过第二区反射后，在会聚透镜上形成的光斑可以接近于覆盖会聚透镜的整个镜面。如此，可以缩小荧光轮中第一区射出的荧光的出光角度范围与第二区射出的激光的出光角度范围的差异，进而可以优化该荧光与该激光的混光效果，具体的，经过扩散后的蓝光与荧光光斑在均经过反射区反射完成合光时，光轴重合度和光斑重合度均可以提高，从而合光光斑的亮度均匀性和颜色均匀性均可改善。It should be noted that when the first area on the fluorescent wheel 105 emits fluorescence under the excitation of the laser, the area irradiated by the laser in the first area emits light in all directions, and the side of the fluorescent wheel 105 away from the condensing lens 104 does not emit light. It is light-transmissive, so the light-emitting angle of the area irradiated by the laser in the first zone can be roughly in the range of 0-180 degrees, and the area is similar to Lambertian when emitting fluorescence. The light spot formed on the condensing lens by the fluorescent light emitted from the first zone can be close to covering the entire mirror surface of the condensing lens. In the embodiment of the present application, a light diffusion structure is provided on the second area, so that after the laser is directed to the second area, the laser light is reflected by the second area and diffused by the light diffusion structure. The exit angle range of the laser light is relative to the incident angle The range increases. After the laser is directed to the second area, it can be emitted to a larger area to be directed to the condensing lens. At this time, the position irradiated by the laser on the second area is also equivalent to a Lambertian-like point light source. Optionally, after the laser light is reflected by the second zone, the light spot formed on the condensing lens can be close to covering the entire mirror surface of the condensing lens. In this way, the difference between the emission angle range of the fluorescence emitted from the first zone and the laser emission from the second zone in the phosphor wheel can be reduced, and the mixing effect of the fluorescence and the laser can be optimized. Specifically, after diffusion When both the blue light and the fluorescent spot are reflected by the reflective area to complete the light combination, the optical axis coincidence degree and the spot coincidence degree can be improved, so that the brightness uniformity and color uniformity of the combined light spot can be improved.

以及，本申请实施例中，由于荧光轮105的第一区和第二区在射出光时均类似朗伯体，射出的光束中间部分的光能量较高，而边缘部分的光能量较低。故即使经荧光轮的第一区或第二区射向合光镜片103的光中边缘的部分从透射区射出，而无法被利用于形成投影画面，但是由于透出的光在整个光束中的能量占比较小，因此投影光源的光损较小。Moreover, in the embodiment of the present application, since the first area and the second area of the fluorescent wheel 105 are similar to Lambertians when emitting light, the light energy of the middle part of the emitted light beam is higher, and the light energy of the edge part is lower. Therefore, even if the edge part of the light emitted to the light combining lens 103 through the first zone or the second zone of the fluorescent wheel is emitted from the transmission zone, it cannot be used to form a projection screen, but because the transmitted light is in the entire beam The energy is relatively small, so the light loss of the projection light source is relatively small.

综上所述，本申请实施例提供的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。如此不设置中继回路***，仅通过荧光轮反射以及合光镜片合光就可实现激光与荧光的合光，该投影光源的体积较小。In summary, in the projection light source provided by the embodiment of the present application, the light combining lens includes a transmission area and a reflection area, the fluorescent wheel includes a first area and a second area, and the laser light emitted by the laser can be directed through the transmission area of the light combining lens. The fluorescent wheel further excites the first area to emit fluorescence when it is directed to the first area of the fluorescent wheel, and the fluorescence is reflected on the light combining lens along the target direction. When the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction. In this way, without the relay circuit system, the combination of laser light and fluorescence can be realized only through the reflection of the fluorescent wheel and the light combining of the light combining lens, and the volume of the projection light source is small.

另外，合光镜片中透射区分别位于反射区的两侧，由于射向合光镜片的光束中间部分的光能量较高，而边缘部分的光能量较低，故即使射向合光镜片的光从透射区射出，该透出的光的能量也较小，因此投影光源的光损较小。荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，采用该混光效果更好的光形成投影画面，该投影画面的显示效果也较好。In addition, the transmission area of the light combining lens is located on both sides of the reflection area. Because the light energy of the middle part of the light beam directed to the light combining lens is higher, and the light energy of the edge part is lower, even if the light directed to the light combining lens Emitted from the transmission area, the energy of the transmitted light is also small, so the light loss of the projection light source is small. The second area of the fluorescent wheel is provided with a light diffusion part. When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the light emitted by the laser from the fluorescent wheel. Angle range. Since the light emission angle range of the fluorescent light excited in the first zone is relatively large, it can ensure that the light output angle range of the laser and the fluorescent light is small, and the mixing effect of the laser and the fluorescent light is better, and the light forming with the better light mixing effect is adopted. The projection screen, the display effect of the projection screen is also better.

基于上述实施例的投影光源架构，下面将结合附图对荧光轮105进行介绍：Based on the projection light source architecture of the foregoing embodiment, the fluorescent wheel 105 will be introduced below in conjunction with the accompanying drawings:

图3是本申请实施例提供的一种荧光轮的结构示意图，且图3示出的是图2中荧光轮的俯视图。请结合图2与图3，荧光轮105可以绕转轴Z转动，以使从会聚透镜104会聚至荧光轮105的激光(如包括第一激光束和第二激光束)在第一区1051和第二区1052之间切换。可选地，该荧光轮105可以呈圆环状，该圆环的环面可以与辅助方向(y方向)相交，该转轴Z可以平行于y方向，该转轴Z可以经过该圆环的圆心且垂直于圆环的环面。可选地，荧光轮105可以包括反光基板，该反光基板上部分区域可以设置有荧光材料(如荧光粉)，部分区域可以设置有光扩散部。设置有荧光材料的区域即为荧光轮105的第一区1051，设置有光扩散部的区域即为荧光轮105的第二区1052。每种颜色的荧光材料可以被激发出该种颜色的激光。FIG. 3 is a schematic structural diagram of a fluorescent wheel provided by an embodiment of the present application, and FIG. 3 shows a top view of the fluorescent wheel in FIG. 2. 2 and 3, the fluorescent wheel 105 can rotate around the axis of rotation Z, so that the laser from the condensing lens 104 to the fluorescent wheel 105 (for example, including the first laser beam and the second laser beam) in the first zone 1051 and the first zone 1051 Switch between the two areas 1052. Optionally, the fluorescent wheel 105 may have a circular ring shape, the toroidal surface of the circular ring may intersect the auxiliary direction (y direction), the rotation axis Z may be parallel to the y direction, the rotation axis Z may pass through the center of the circular ring and The torus perpendicular to the torus. Optionally, the fluorescent wheel 105 may include a light-reflecting substrate, and a part of the area of the light-reflecting substrate may be provided with a fluorescent material (such as phosphor), and a part of the area may be provided with a light diffusion part. The area where the fluorescent material is provided is the first area 1051 of the fluorescent wheel 105, and the area where the light diffusion portion is provided is the second area 1052 of the fluorescent wheel 105. The fluorescent material of each color can be excited by the laser of that color.

激光射向第一区1051时，可以激发其上的荧光粉发出对应颜色的荧光，该荧光与激光的颜色不同，该荧光可以被反光基板反射向会聚透镜104。示例地，荧光轮105的第一区中可以至少设置有绿色荧光材料。该第一区中也可以设置有红色荧光材料和黄色荧光材料中的至少一种。荧光轮105的第一区发出的荧光可以为绿色荧光、红色荧光或者其他颜色的荧光，如黄色荧光。可选地，该荧光也可以为一种激光。该荧光的颜色与激光器101发出的激光的颜色不同，如激光器101可以发出蓝色激光。可选地，激光器101发出的激光的颜色也可以为其他颜色，本申请实施例不做限定。When the laser is directed to the first area 1051, it can excite the phosphors on it to emit fluorescence of the corresponding color. The fluorescence is different from the laser light, and the fluorescence can be reflected by the reflective substrate toward the converging lens 104. For example, at least a green fluorescent material may be provided in the first region of the fluorescent wheel 105. At least one of a red fluorescent material and a yellow fluorescent material may also be provided in the first region. The fluorescence emitted by the first area of the fluorescent wheel 105 may be green fluorescence, red fluorescence or other colors of fluorescence, such as yellow fluorescence. Optionally, the fluorescence can also be a laser. The color of the fluorescence is different from the color of the laser light emitted by the laser 101, for example, the laser 101 can emit blue laser light. Optionally, the color of the laser light emitted by the laser 101 may also be other colors, which is not limited in the embodiment of the present application.

示例地，本申请实施例中荧光轮105中的第一区1051可以包括至少一个子区域，每个子区域可以设置一种颜色的荧光材料。当该第一区1051包括多个子区域时，该多个子区域与第二区1052可以呈圆周排布。如该第一区1051可以包括两个子区域G1和G2。荧光轮105可以绕转轴Z沿w方向或w方向的反方向转动。如该两个子区域可以分别包括绿色荧光材料和红色荧光材料，或者该两个子区域可以分别包括绿色荧光材料和黄色荧光材料，或者该两个子区域可以分别包括绿色荧光材料和桔色荧光材料。需要说明的是，本申请实施例仅以第一区中各个子区域的面积相等，且第二区的面积与任一子区域的面积也相等为例进行示意。可选地，荧光轮的第一区中各个子区域和第二区的面积也可以不同，各个子区域和荧光轮的第二区的面积可以根据其射出的光线在所需得到的光中的占比进行设计。For example, the first region 1051 in the fluorescent wheel 105 in the embodiment of the present application may include at least one sub-region, and each sub-region may be provided with a fluorescent material of one color. When the first region 1051 includes multiple sub-regions, the multiple sub-regions and the second region 1052 may be arranged in a circle. For example, the first area 1051 may include two sub-regions G1 and G2. The fluorescent wheel 105 can rotate about the rotation axis Z in the w direction or the opposite direction of the w direction. For example, the two sub-regions may include a green fluorescent material and a red fluorescent material, or the two sub-regions may include a green fluorescent material and a yellow fluorescent material, or the two sub-regions may include a green fluorescent material and an orange fluorescent material, respectively. It should be noted that the embodiment of the present application only takes as an example the area of each sub-region in the first region is equal, and the area of the second region is also equal to the area of any sub-region as an example. Optionally, the area of each sub-area and the second area in the first area of the fluorescent wheel can also be different, and the area of each sub-area and the second area of the fluorescent wheel can be based on the amount of light it emits in the desired light. Proportion to design.

激光射向荧光轮105的第二区1052时，可以在其上的光扩散部进行扩散，并被反光基板反射向会聚透镜104。可选地，荧光轮105中的第二区上设置的光扩散部可以包括扩散片或者漫反射体。该漫反射体可以为漫反射涂层，或者漫反射板。示例地，可以反光基板中第二区1052对应的区域贴附扩散片，或者涂覆漫反射涂层。可选地，该扩散片可以为大角度扩散片，也即是该扩散片对光线的扩散角度可以大于角度阈值；该漫反射涂层可以为高反射率的漫反射涂层，也即是该漫反射涂层对光线的反射率可以大于反射率阈值。可选地，由于漫反射体可以对光线直接进行反射，若该光扩散部为漫反射体，则荧光轮105的基板中的第二区1052所在处也可以不具备反光功能。When the laser light is directed to the second area 1052 of the fluorescent wheel 105, it can be diffused by the light diffusing part thereon, and reflected by the reflective substrate toward the condensing lens 104. Optionally, the light diffusion portion provided on the second area of the fluorescent wheel 105 may include a diffusion sheet or a diffuse reflector. The diffuse reflector may be a diffuse reflection coating or a diffuse reflection plate. For example, the area corresponding to the second area 1052 in the reflective substrate may be attached with a diffuser or coated with a diffuse reflection coating. Optionally, the diffuser may be a large-angle diffuser, that is, the diffusion angle of the diffuser to the light may be greater than the angle threshold; the diffuse reflection coating may be a diffuse reflection coating with high reflectivity, that is, the diffuse reflection coating The reflectivity of the diffuse reflection coating to light may be greater than the reflectivity threshold. Optionally, since the diffuse reflector can directly reflect light, if the light diffuser is a diffuse reflector, the second area 1052 of the substrate of the fluorescent wheel 105 may not have a light reflection function.

从荧光轮105的第一区1051射出的荧光以及从荧光轮105的第二区1052射出的激光，均可以在较大的出光角度范围***向会聚透镜104。可选地，该激光与荧光在经过会聚透镜104后可以均呈平行光。由于荧光轮中该第一区与第二区在出射光时均类似于朗伯体，朝会聚透镜整面出光，会聚透镜可以将射入的光进行准直，以使该光以一整束类似于平行光的形式出射。可选地，本申请实施例以会聚透镜104仅为一个凸透镜为例，可选地，该会聚透镜104也可以由多个透镜组成，以提高会聚透镜对光的会聚效果。Both the fluorescent light emitted from the first area 1051 of the fluorescent wheel 105 and the laser light emitted from the second area 1052 of the fluorescent wheel 105 can be directed to the condensing lens 104 within a relatively large light output angle range. Optionally, both the laser light and the fluorescent light may be parallel light after passing through the condensing lens 104. Since the first zone and the second zone in the fluorescent wheel are similar to Lambertian when emitting light, they emit light toward the entire surface of the condensing lens, and the condensing lens can collimate the incident light so that the light is in a whole beam It emits in a form similar to parallel light. Optionally, in the embodiment of the present application, the condensing lens 104 is only one convex lens as an example. Optionally, the condensing lens 104 may also be composed of multiple lenses to improve the light condensing effect of the condensing lens.

图4是本申请实施例提供的另一种投影光源的结构示意图。如图4所示，在图2的基础上，激光器10还可以包括分光器件106，激光器101可以向该分光器件106发出激光，分光器件106可以将激光器101发出的激光分为多束激光后射向合光镜片103的两个透射区。示例地，如图4所示，激光器101和分光器件106可以沿目标方向(如图4中的x方向)依次排布。分光器件106、合光镜片103、会聚透镜104和荧光轮105可以沿辅助方向(如图4中的y方向)依次排布。激光器101可以向该分光器件106发出激光，分光器件106可以将激光器101发出的激光分为多束激光后射向合光镜片103中的两个透射区。Fig. 4 is a schematic structural diagram of another projection light source provided by an embodiment of the present application. As shown in FIG. 4, on the basis of FIG. 2, the laser 10 may also include a beam splitting device 106. The laser 101 may emit laser light to the beam splitting device 106. The beam splitting device 106 may divide the laser light emitted by the laser 101 into multiple laser beams. To the two transmission areas of the light combining lens 103. For example, as shown in FIG. 4, the laser 101 and the beam splitting device 106 may be arranged in sequence along the target direction (the x direction in FIG. 4). The light splitting device 106, the light combining lens 103, the condensing lens 104, and the fluorescent wheel 105 may be sequentially arranged along the auxiliary direction (y direction in FIG. 4). The laser 101 can emit laser light to the light splitting device 106, and the light splitting device 106 can divide the laser light emitted by the laser 101 into multiple laser beams and then irradiate them to two transmission areas in the light combining lens 103.

下面结合附图对投影光源中的分光器件106进行介绍：The light splitting device 106 in the projection light source will be introduced below with reference to the accompanying drawings:

可选地，分光器件106包括多个分光镜，该多个分光镜距激光器101的出光面的距离均不同。分光镜与激光器的出光面的距离可以包括：该分光镜靠近激光器的表面中的任一点与该出光面的距离。分光器件中该多个分光镜可以满足：任意两个分光镜中，一个分光镜在激光器的出光面上的至少部分正投影，位于另一个分光镜在激光器的出光面上的正投影之外；该一个分光镜中的点与激光器的最小间距可以大于另一个分光镜中的点与激光器的最大间距。故每个分光镜靠近激光器的表面中所有点与激光器的距离，均不同于其他分光镜靠近激光器的表面中任一点与激光器的距离。Optionally, the beam splitting device 106 includes a plurality of beam splitters, and the distances of the plurality of beam splitters from the light exit surface of the laser 101 are all different. The distance between the beam splitter and the light exit surface of the laser may include: the distance between any point on the surface of the beam splitter close to the laser and the light exit surface. The multiple beamsplitters in the beam splitter can satisfy the following requirements: among any two beamsplitters, at least part of the orthographic projection of one beam splitter on the light exit surface of the laser is located outside of the orthographic projection of the other beam splitter on the light exit surface of the laser; The minimum distance between the point in the one beam splitter and the laser may be greater than the maximum distance between the point in the other beam splitter and the laser. Therefore, the distance between all points on the surface of each beam splitter close to the laser and the laser is different from the distance between any point on the surface of other beam splitters close to the laser and the laser.

每个分光镜用于接收激光器101发出的激光中的部分激光，并将接收的该部分激光作为一束激光反射，如反射向合光镜片103中的透射区，如此将激光器101发出的激光分为多束激光，且使该多束激光射向合光镜片103中的两个透射区。可选地，分光镜的各个表面可以均为反光面，或者分光镜中也可以仅朝向激光器101的表面为反光面。可选地，可以通过调整各个分光镜的位置，调整分束得到的各束激光之间的距离。分光器件106中分光镜的个数与对激光分束所得的激光束的数量相同。可选地，分光器件也可以通过其他方式实现分光，本申请实施例不做限定。Each beam splitter is used to receive part of the laser light emitted by the laser 101, and reflect this part of the received laser light as a beam of laser light, such as reflecting toward the transmission area of the light combining lens 103, thus dividing the laser light emitted by the laser 101 There are multiple laser beams, and the multiple laser beams are directed to the two transmission areas in the light combining lens 103. Optionally, each surface of the beam splitter may be a reflective surface, or only the surface facing the laser 101 in the beam splitter may be a reflective surface. Optionally, the distance between the laser beams obtained by splitting can be adjusted by adjusting the position of each beam splitter. The number of beam splitters in the beam splitting device 106 is the same as the number of laser beams obtained by splitting the laser beam. Optionally, the light splitting device may also implement light splitting in other ways, which is not limited in the embodiment of the present application.

示例地，如图4所示，分光器件106包括两个分光镜，分别为分光镜1061和1062。激光器101可以仅发出一束激光，该一束激光可以射向分光镜1061和1062，每个分光镜可以分别反射该一束激光中射向该分光镜的部分激光，进而该两个分光镜可以将该一束激光分成第一激光束L1和第二激光束L2。该第一激光束L1可以射向第一透射区1031a，并穿过第一透射区1031a射向会聚透镜104；第二激光束L2可以射向第二透射区1031b，并穿过第二透射区1031b射向会聚透镜104。如图4所示，投影光源中两个分光镜在x方向(也即激光器101的出光方向)上的间距越大，对激光器101发出的激光进行分束得到的该两束激光的间距就越大。故可以通过调整各个分光镜在激光器101的出光方向上的间距，来调整各个分光镜射出的各束激光之间的间距。Illustratively, as shown in FIG. 4, the beam splitter 106 includes two beam splitters, which are

beam splitters

1061 and 1062, respectively. The laser 101 can emit only one laser beam, and the laser beam can be directed to the

beam splitters

1061 and 1062, and each beam splitter can reflect part of the laser beam directed to the beam splitter, and the two beam splitters can The one laser beam is divided into a first laser beam L1 and a second laser beam L2. The first laser beam L1 can be directed to the first transmission area 1031a and pass through the first transmission area 1031a to the condensing lens 104; the second laser beam L2 can be directed to the second transmission area 1031b and pass through the second transmission area 1031b is directed toward the converging lens 104. As shown in Figure 4, the larger the distance between the two beamsplitters in the projection light source in the x-direction (that is, the light-emitting direction of the laser 101), the larger the distance between the two laser beams obtained by splitting the laser light emitted by the laser 101. big. Therefore, the spacing between the laser beams emitted by each beam splitter can be adjusted by adjusting the spacing of each beam splitter in the light emitting direction of the laser 101.

需要说明的是，图4以分光器件106包括两个分光镜，以将激光器101射出的激光分为分别射向合光镜片103中的两个透射区的两束激光为例。可选地，分光器件也可以包括三个、四个甚至更多分光镜，以将激光器101发出的激光分成三束激光、四束激光甚至更多，进而使分出的激光中的多束激光射向同一透射区，本申请实施例对激光器发出的激光光束的个数不做限定。It should be noted that, in FIG. 4, the beam splitting device 106 includes two beam splitters, and the laser light emitted by the laser 101 is divided into two laser beams respectively directed to the two transmission areas of the light combining lens 103 as an example. Optionally, the beam splitting device may also include three, four or more beam splitters to divide the laser light emitted by the laser 101 into three laser beams, four laser beams, or even more, so that multiple laser beams in the separated laser beams The number of laser beams emitted by the laser is not limited in the embodiment of the present application for the same transmission area.

图5是本申请实施例提供的再一种投影光源的结构示意图。如图5所示，在图4的基础上，投影光源10还可以包括两个缩束部件102。缩束部件102位于分光器件106与合光镜片103之间。缩束部件102用于对射入的激光进行缩束，也即是使射入的激光束变细后射出。该两个缩束部件102可以与合光镜片103中的两个透射区一一对应。激光器101射出的激光可以经缩束部件102缩束后，再射向合光镜片103中该缩束部件102对应的透射区。本申请实施例以投影光源10包括分光器件106的基础上再包括缩束部件102为例，可选地，投影光源10也可以在不包括分光器件106时包括缩束部件102，本申请实施例不做限定。Fig. 5 is a schematic structural diagram of still another projection light source provided by an embodiment of the present application. As shown in FIG. 5, on the basis of FIG. 4, the projection light source 10 may further include two beam shrinking parts 102. The beam shrinking component 102 is located between the beam splitting device 106 and the light combining lens 103. The beam shrinking part 102 is used to shrink the incident laser beam, that is, to narrow the incident laser beam and then emit it. The two contraction parts 102 may correspond to the two transmission regions in the light combining lens 103 one-to-one. The laser light emitted by the laser 101 can be reduced by the beam reduction component 102 and then directed to the transmission area corresponding to the beam reduction component 102 in the light combining lens 103. In the embodiment of the present application, the projection light source 10 includes the beam splitting device 106 and further includes the beam shrinking component 102 as an example. Optionally, the projection light source 10 may also include the beam shrinking component 102 when the beam splitting device 106 is not included. Not limited.

可选地，分光器件106中的多个分光镜、多个缩束部件102以及合光镜片103中的多个透射区分别一一对应。每个分光镜射出的激光束经对应的缩束部件102缩束后射向对应的透射区。示例地，分光镜的数量、缩束部件102的数量以及合光镜片103中透射区的数量均为2，激光器101发出的激光被分光器件106分成的多束激光包括：第一激光束L1和第二激光束L2。该第一激光束L1通过对应的缩束部件102缩束后射向第一透射区1031a，并穿过第一透射区1031a射向会聚透镜104；该第二激光束L2通过对应的缩束部件102缩束后射向第二透射区1031b，并穿过第二透射区1031b射向会聚透镜104。Optionally, the multiple beam splitters in the beam splitting device 106, the multiple beam reduction components 102, and the multiple transmission regions in the light combining lens 103 respectively correspond one to one. The laser beam emitted by each beam splitter is shrunk by the corresponding beam reduction component 102 and then directed to the corresponding transmission area. For example, the number of beam splitters, the number of beam reduction parts 102, and the number of transmission areas in the light combining lens 103 are all 2. The laser light emitted by the laser 101 is divided by the beam splitting device 106 into multiple laser beams including: the first laser beam L1 and The second laser beam L2. The first laser beam L1 is shrunk by the corresponding beam reduction component 102 and then directed to the first transmission area 1031a, and then passes through the first transmission area 1031a to the converging lens 104; the second laser beam L2 passes through the corresponding beam reduction component After the beam 102 is reduced, it is directed to the second transmission area 1031b, and passes through the second transmission area 1031b to the converging lens 104.

本申请实施例中分光器件106分出的每束激光均可以通过独立的缩束部件102进行缩束，如此可以保证对各束激光的缩束效果差异较小，保证对各束激光的缩束效果均较好。且即使某一缩束部件出现问题，其他缩束部件仍可正常工作，降低由于缩束部件导致投影光源完全无法使用的风险。In the embodiment of the present application, each laser beam split by the beam splitting device 106 can be reduced by the independent beam reduction component 102, which can ensure that the beam reduction effect of each laser beam is small, and the beam reduction of each laser beam can be ensured The effect is good. And even if there is a problem with a certain shrinkage component, other shrinkage components can still work normally, reducing the risk that the projection light source is completely unusable due to the shrinkage component.

可选地，缩束部件102可以包括沿辅助方向依次排布的一个凸透镜1021和一个凹透镜1022。从分光镜射出的激光可以射向凸透镜1021，凸透镜1021可以将射入的激光会聚后射向凹透镜1022，凹透镜1022可以将射入的激光准直后射向合光影片103中该缩束部件102对应的透射区，如此实现缩束部件102对激光的缩束。Optionally, the beam reduction component 102 may include a convex lens 1021 and a concave lens 1022 arranged in the auxiliary direction in sequence. The laser light emitted from the beam splitter can be directed to the convex lens 1021, the convex lens 1021 can converge the incident laser light and then be directed to the concave lens 1022, and the concave lens 1022 can collimate the incident laser light and then be directed to the converging part 102 in the light combining film 103 In the corresponding transmission area, the beam reduction component 102 reduces the laser beam in this way.

下面结合附图2至5对合光镜片103进行介绍：The combined light lens 103 will be introduced below in conjunction with Figures 2 to 5:

合光镜片103的镜面可以倾斜设置，以保证将会聚透镜射出的光线沿目标方向反射。从会聚透镜104射向合光镜片103的光(如激光或荧光)类似于平行光，且可以从会聚透镜104整面出射。射向合光镜片103的光不仅射向合光镜片103中的反射区，还可以射向合光镜片103中的透射区。合光镜片103中的反射区可以反射该激光和荧光，对于该反射区是否反射颜色与该激光和荧光均不同的光，本申请实施例不做限定。如该反射区可以为全光谱高反射膜，也即对所有颜色的光均进行反射。合光镜片103可以具有相对的第一面和第二面，该第一面可以朝向激光器101，该第二面可以朝向会聚透镜104。该第一面也即是合光镜片103的入光面，该第二面也即是合光镜片103的出光面。可选地，从会聚透镜104射向合光镜片103的光可以在该第二面便被反射。The mirror surface of the light combining lens 103 can be inclined to ensure that the light emitted by the condenser lens is reflected in the target direction. The light (such as laser or fluorescence) emitted from the condensing lens 104 to the light combining lens 103 is similar to parallel light, and can be emitted from the condensing lens 104 on the entire surface. The light directed to the light combining lens 103 is not only directed to the reflection area of the light combining lens 103, but also to the transmission area of the light combining lens 103. As shown in FIG. The reflection area in the light combining lens 103 can reflect the laser light and fluorescence. Whether the reflection area reflects light with a color different from the laser light and fluorescence is not limited in the embodiment of the present application. For example, the reflective area can be a full-spectrum highly reflective film, that is, all colors of light are reflected. The light combining lens 103 may have a first surface and a second surface opposite to each other, the first surface may face the laser 101, and the second surface may face the condensing lens 104. The first surface is also the light incident surface of the light combining lens 103, and the second surface is also the light emitting surface of the light combining lens 103. Optionally, the light emitted from the condensing lens 104 to the light combining lens 103 may be reflected on the second surface.

可选地，合光镜片103中的透射区可以具有二向色性。该透射区可以透射荧光轮105的第二区1052反射的激光(也是激光器101发出的激光)，且反射荧光轮105的第一区1051被激发出的荧光。可选地，该透射区也可以反射与该激光颜色不同的所以颜色的光。示例地，该透射区可以用于透射蓝光，且反射红光和绿光。如此荧光轮105的第一区1051被激发出的荧光在射向合光镜片103后可以被全部沿目标方向反射，以用于后续形成投影画面，保证了荧光的利用率。可选地，合光镜片103中的透射区也可以针对所有光均透射。Optionally, the transmission zone in the light combining lens 103 may have dichroism. The transmission area can transmit the laser light reflected by the second area 1052 of the fluorescent wheel 105 (also the laser light emitted by the laser 101), and reflect the fluorescence excited by the first area 1051 of the fluorescent wheel 105. Optionally, the transmissive area may also reflect light of all colors that are different from the color of the laser. For example, the transmission area can be used to transmit blue light and reflect red and green light. In this way, the fluorescent light excited by the first area 1051 of the fluorescent wheel 105 can be all reflected in the target direction after being directed to the light combining lens 103 for subsequent formation of a projection image, which ensures the utilization of fluorescent light. Optionally, the transmission area in the light combining lens 103 can also transmit all light.

示例地，请继续参考图2，本申请实施例中合光镜片103可以包括两个透射区和一个反射区，且该两个透射区分别位于该反射区的两端。可选地，合光镜片103中透射区的面积可以小于反射区的面积。如合光镜片103中每个透射区的面积也可以小于反射区的面积，所有透射区的总面积可以小于反射区的面积。可选地，每个透射区的面积可以小于或等于反射区的面积的1/4。可选地，合光镜片103中各个透射区的面积相等，或者各个透射区的面积也可以均不同。需要说明的是，合光镜片103中的透射区的面积仅需满足能透过射入的激光即可。激光器101发出的激光束在经过缩束部件102缩束后，该激光束可以变细，该激光束越细，合光镜片102中透射区的面积便可以越小。可选地，该缩束部件102为高倍率的望远镜***，可以对光束进行较大程度的缩束；如此合光镜片103中的透射区的面积可以较小。进而，即使从会聚透镜104射出的激光也射向合光镜片103中的透射区，并从该透射区透过，由于该透射区的面积很小，也仅会存在很少的激光被浪费，激光的利用率仍较高。For example, please continue to refer to FIG. 2, the light combining lens 103 in the embodiment of the present application may include two transmission areas and one reflection area, and the two transmission areas are respectively located at two ends of the reflection area. Optionally, the area of the transmission area in the light combining lens 103 may be smaller than the area of the reflection area. For example, the area of each transmission area in the light combining lens 103 may also be smaller than the area of the reflection area, and the total area of all transmission areas may be smaller than the area of the reflection area. Optionally, the area of each transmission area may be less than or equal to 1/4 of the area of the reflection area. Optionally, the area of each transmission area in the light combining lens 103 is equal, or the area of each transmission area may also be different. It should be noted that the area of the transmission area in the light combining lens 103 only needs to be able to transmit the incident laser light. After the laser beam emitted by the laser 101 is reduced by the beam reduction component 102, the laser beam can be narrowed. The thinner the laser beam, the smaller the area of the transmission area in the light combining lens 102 can be. Optionally, the beam reduction component 102 is a high-magnification telescope system, which can reduce the beam to a greater extent; in this way, the area of the transmission area in the light combining lens 103 can be smaller. Furthermore, even if the laser light emitted from the condensing lens 104 is directed to the transmission area in the light combining lens 103 and passes through the transmission area, since the area of the transmission area is small, only a small amount of laser light is wasted. The utilization rate of the laser is still relatively high.

可选地，合光镜片103靠近缩束部件102的表面(也即第一面)设置有增透膜，以增加合光镜片103的激光透过率。如该增透膜可以仅针对激光器发出的激光(如蓝色激光)增加透过率，该增透膜为蓝光增透膜；或者该增透膜可以针对全光谱的光线增加透过率，该增透膜为全光谱增透膜。合光镜片103靠近缩束部件102的表面可以整面设置增透膜。可选地，由于合光镜片103中仅透射区用于透射激光，故也可以仅在透射区设置增透膜。如此可以保证从合光镜片103透过的激光较多，激光的损耗较少，提高激光的利用率。Optionally, the surface (ie, the first surface) of the light combining lens 103 close to the beam reduction component 102 is provided with an antireflection coating to increase the laser transmittance of the light combining lens 103. For example, the antireflection coating can only increase the transmittance of the laser light (such as blue laser) emitted by the laser, and the antireflection coating is a blue antireflection coating; or the antireflection coating can increase the transmittance for the full spectrum of light, the The anti-reflection coating is a full-spectrum anti-reflection coating. The surface of the light combining lens 103 close to the condensing component 102 may be provided with an anti-reflection coating on the entire surface. Optionally, since only the transmission area of the light combining lens 103 is used to transmit laser light, an antireflection film may be provided only in the transmission area. In this way, it can be ensured that more laser light is transmitted through the light combining lens 103, the loss of the laser light is less, and the utilization rate of the laser light is improved.

可选地，合光镜片103靠近缩束部件102的表面设置有光扩散结构。示例地，该光扩散结构可以为扩散片，或者由多个微棱镜结构组成的结构，或者包括多个平行的条状凸起。该光扩散结构为小角度扩散结构，该光扩散结构对光线的扩散角度小于角度阈值。该光扩散结构可以将射向合光镜片103的激光进行扩散，以保证从合光镜片103射出的激光的能量分布均匀性较高，进而该激光射向荧光轮105的第一区后，第一区被激发发出的荧光的能量分布较为均匀。Optionally, a light diffusing structure is provided on the surface of the light combining lens 103 close to the contraction component 102. For example, the light diffusion structure may be a diffusion sheet, or a structure composed of a plurality of microprism structures, or include a plurality of parallel strip-shaped protrusions. The light diffusion structure is a small-angle diffusion structure, and the light diffusion angle of the light diffusion structure is smaller than the angle threshold. The light diffusion structure can diffuse the laser light directed to the light combining lens 103 to ensure that the energy distribution uniformity of the laser light emitted from the light combining lens 103 is relatively high, and then the laser light is directed to the first area of the fluorescent wheel 105. The energy distribution of the fluorescence emitted by a region is more uniform.

在合光镜片的一种可选实现方式中，可以在透光基板上不同区域设置功能膜层，以得到合光镜片中的透射区和反射区。示例地，对于反射区，合光镜片103的反射区可以具有镀膜。该镀膜可以为全波段反射膜，或者，该镀膜为针对红光波段、绿光波段和蓝光波段的反射膜。该镀膜可以位于合光镜片103靠近缩束部件102的一侧，也可以位于合光镜片103远离缩束部件102的一侧，本申请实施例不做限定。对于透射区，合光镜片103靠近缩束部件102的一侧，至少在透射区的表面设置有二向色膜。该二向色膜可以用于透蓝光，反射红光和绿光。在合光镜片的另一种可选实现方式中，合光镜片103的反射区也可以直接采用反光材料制作而成。可选地，合光镜片103中的透射区也可以直接采用具有二向色性的材料制备而成。此时，可以不再设置该镀膜和二向色膜。In an optional implementation of the light-combining lens, functional film layers can be arranged in different areas on the light-transmitting substrate to obtain the transmission area and the reflection area in the light-combining lens. For example, for the reflection area, the reflection area of the light combining lens 103 may have a coating. The coating film may be a full-wavelength reflective film, or the coating film is a reflective film for the red, green, and blue wavelength bands. The coating may be located on the side of the light combining lens 103 close to the contraction part 102, or on the side of the light combining lens 103 away from the contraction part 102, which is not limited in the embodiment of the present application. For the transmission area, the light combining lens 103 is close to the beam reduction component 102, and at least the surface of the transmission area is provided with a dichroic film. The dichroic film can be used to transmit blue light and reflect red and green light. In another alternative implementation of the light combining lens, the reflective area of the light combining lens 103 can also be directly made of reflective materials. Optionally, the transmission area in the light combining lens 103 can also be directly prepared by using dichroic materials. At this time, the plating film and the dichroic film can no longer be provided.

下面结合附图对激光器101进行介绍：The laser 101 will be introduced below in conjunction with the drawings:

本申请实施例中，投影光源可以包括一个激光器101，分别射向多个缩束部件102的多束激光均由同一激光器101发出。激光器101可以为多芯片激光二极管(multi_chip Laser Diode，MCL)型的激光器，MCL型的激光器可以包括封装在同一管壳中阵列排布的多个发光芯片，每个发光芯片均可以独立地发出激光。射向分光器件106中不同分光镜的激光可以由该激光器中的不同发光区域射出，如上述第一激光束L1和第二激光束L2可以分别由激光器101中的不同发光区域中的发光芯片发出。可选地，射向分光器件106中不同分光镜的激光也可以来源于不同的激光器，本申请实施例不做限定。In the embodiment of the present application, the projection light source may include a laser 101, and the multiple laser beams respectively directed to the multiple beam reduction components 102 are all emitted by the same laser 101. The laser 101 may be a multi-chip Laser Diode (MCL) type laser. The MCL type laser may include multiple light-emitting chips arranged in an array and packaged in the same package, and each light-emitting chip can emit laser light independently. . Lasers directed to different beamsplitters in the beam splitting device 106 can be emitted from different light-emitting areas in the laser. For example, the above-mentioned first laser beam L1 and second laser beam L2 can be respectively emitted by light-emitting chips in different light-emitting areas in the laser 101 . Optionally, the laser light directed to different beamsplitters in the beam splitting device 106 may also originate from different lasers, which is not limited in the embodiment of the present application.

在激光器的第一种发光方式中，激光器中的所有发光芯片同时发光，进而实现同时向分光器件106中的所有分光镜发出激光。此种情况中，激光器发出的激光的亮度较高，该激光在通过缩束部件、合光镜片、会聚透镜和荧光轮等光学部件被沿目标方向收集之后亮度仍较高。且该激光的能量较高，可以激发荧光轮上的第一区发出亮度较高的荧光。如此激光与荧光混合所得的用于形成投影画面的光亮度较高，进而可以保证形成的投影画面的亮度较高，保证了投影设备的投影效果较好。In the first light-emitting mode of the laser, all the light-emitting chips in the laser emit light at the same time, so as to realize the simultaneous emission of laser light to all the beamsplitters in the beam splitter 106. In this case, the brightness of the laser light emitted by the laser is relatively high, and the brightness of the laser light is still relatively high after being collected along the target direction through optical components such as the beam reducing part, the light combining lens, the condensing lens, and the fluorescent wheel. In addition, the energy of the laser is relatively high, which can excite the first area on the fluorescent wheel to emit high-brightness fluorescence. In this way, the brightness of the projection screen obtained by mixing the laser and the fluorescent light is relatively high, thereby ensuring that the brightness of the formed projection screen is relatively high, and the projection effect of the projection device is better.

在激光器的第二种发光方式中，激光器中的发光芯片可以分时发光。如激光器中第一部分芯片和第二部分芯片交替发光；第一部分芯片和第二部分芯片的发光时间可以根据荧光轮中第一区与第二区的切换时序确定。如第一部分芯片发出的激光用于射向第一区，第二部分芯片发出的激光用于射向第二区。可选地，激光器101可以在不同时间向不同分光镜发出激光。示例地，图2中激光器发出的第一激光束L1可以为第一部分芯片发出的激光，第二激光束L2可以为第二部分芯片发出的激光。此种情况中，由于激光器中的发光芯片无需持续发光，故可以采用脉冲电流为发光芯片供电，而脉冲电流的能量较高，故可以激光发光芯片发出亮度较高的激光。且激光器中的发光芯片无需持续发光，可以提高激光器中发光芯片的使用寿命。可选地，激光器中各个发光芯片的发光时间也可以与荧光轮中第一区和第二区的切换时序无关，本申请实施例不做限定。可选地，第一部分芯片也可以再分为几部分芯片，每部分芯片发出的激光用于射向第一区中的一个子区域。可选地，第一部分芯片与第二部分芯片的数量可以相同，或者也可以不同，本申请实施例不做限定。In the second light-emitting mode of the laser, the light-emitting chip in the laser can emit light in a time-sharing manner. For example, the first part of the chip and the second part of the chip in the laser emit light alternately; the light-emitting time of the first part of the chip and the second part of the chip can be determined according to the switching timing of the first zone and the second zone in the fluorescent wheel. For example, the laser light emitted from the first part of the chip is used to target the first area, and the laser light emitted from the second part of the chip is used to target the second area. Optionally, the laser 101 can emit laser light to different beamsplitters at different times. For example, the first laser beam L1 emitted by the laser in FIG. 2 may be the laser emitted by the first part of the chip, and the second laser beam L2 may be the laser emitted by the second part of the chip. In this case, since the light-emitting chip in the laser does not need to continuously emit light, a pulse current can be used to power the light-emitting chip, and the pulse current has a higher energy, so the laser light-emitting chip can emit laser light with higher brightness. In addition, the light-emitting chip in the laser does not need to continuously emit light, which can increase the service life of the light-emitting chip in the laser. Optionally, the light-emitting time of each light-emitting chip in the laser may also be independent of the switching timing of the first zone and the second zone in the fluorescent wheel, which is not limited in the embodiment of the present application. Optionally, the first part of chips can also be subdivided into several parts of chips, and the laser light emitted by each part of the chips is used to irradiate a sub-area in the first area. Optionally, the number of the first part of the chip and the second part of the chip may be the same or different, which is not limited in the embodiment of the present application.

图6是本申请另一实施例提供的一种投影光源的结构示意图。如图6所示，在上述任一投影光源的基础上，投影光源10还可以包括收光透镜108和匀光部件109，图6以图5所示的投影光源为基础进行示意。分光器件106、合光镜片103、收光透镜108和匀光部件109可以沿目标方向依次排布。合光镜片103可以将从会聚透镜104射出的光沿目标方向反射向收光透镜108，进而收光透镜108可以将射入的光会聚至匀光部件109，匀光部件109可以将射入的光进行匀化后射向后续的部件中，以用于形成投影画面。示例地，匀光部件109可以为光导管或复眼透镜，图6以匀光部件109为光导管为例。Fig. 6 is a schematic structural diagram of a projection light source provided by another embodiment of the present application. As shown in FIG. 6, based on any of the above-mentioned projection light sources, the projection light source 10 may further include a light collecting lens 108 and a light homogenizing component 109. FIG. 6 is based on the projection light source shown in FIG. The light splitting device 106, the light combining lens 103, the light collecting lens 108 and the light homogenizing part 109 may be arranged in sequence along the target direction. The light combining lens 103 can reflect the light emitted from the condensing lens 104 in the target direction to the light collecting lens 108, and then the light collecting lens 108 can condense the incident light to the light homogenizing part 109, and the light homogenizing part 109 can reduce the incident light. After being homogenized, the light is directed to subsequent parts to form a projection image. For example, the light homogenizing component 109 may be a light pipe or a fly-eye lens, and FIG. 6 takes the light homogenizing component 109 as an example of a light pipe.

综上所述，本申请实施例提供的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。如此不设置中继回路***，仅通过荧光轮反射和合光镜片合光就可实现激光与荧光的合光，该投影光源的体积较小。In summary, in the projection light source provided by the embodiment of the present application, the light combining lens includes a transmission area and a reflection area, the fluorescent wheel includes a first area and a second area, and the laser light emitted by the laser can be directed through the transmission area of the light combining lens. The fluorescent wheel further excites the first area to emit fluorescence when it is directed to the first area of the fluorescent wheel, and the fluorescence is reflected on the light combining lens along the target direction. When the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction. Without the relay circuit system, the combination of laser and fluorescence can be realized only by the reflection of the fluorescent wheel and the combination of the light combining lens, and the volume of the projection light source is small.

另外，激光器发出的每束激光通过对应的缩束部件进行缩束，可以提高各束激光的缩束效果，进而合光镜片上的透射区的尺寸可以较小，从透射区射出而无法利用的激光较少，保证了激光的利用率。荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，合光光斑的亮度均匀性和颜色均匀性也均得到改善，采用该混光效果更好的光形成投影画面，该投影画面的显示效果也较好。In addition, each laser beam emitted by the laser is reduced by the corresponding beam reduction component, which can improve the beam reduction effect of each laser beam, and the size of the transmission area on the light combining lens can be smaller, which is unusable when emitted from the transmission area. There are fewer lasers, which ensures the utilization of lasers. The second area of the fluorescent wheel is provided with a light diffusion part. When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the light emitted by the laser from the fluorescent wheel. Angle range. Due to the large angle range of the excited fluorescence in the first zone, it can ensure that the angle of the laser and fluorescence is small, the mixing effect of laser and fluorescence is better, and the brightness uniformity and color of the combined light spot are uniform The performance is also improved, and the projection screen is formed by using the light with better light mixing effect, and the display effect of the projection screen is also better.

图7是本申请实施例提供的一种投影设备的结构示意图。如图7所示，在图6的基础上，投影设备还可以包括光阀110和镜头111。投影光源10中的匀光部件109可以将光射向光阀110，光阀110可以将射入的光进行调制后射向镜头111，镜头111可以对射入的光进行投射以形成投影画面。Fig. 7 is a schematic structural diagram of a projection device provided by an embodiment of the present application. As shown in Fig. 7, based on Fig. 6, the projection device may further include a light valve 110 and a lens 111. The light homogenizing component 109 in the projection light source 10 can direct light to the light valve 110. The light valve 110 can modulate the incident light and then project it to the lens 111. The lens 111 can project the incident light to form a projection image.

示例地，光阀110可以包括多个反射片，每个反射片可以用于形成投影画面中的一个像素，光阀110可以根据待显示的图像使其中需呈亮态显示的像素对应的反射片将激光反射至镜头111，以实现对光线的调制。镜头111可以包括多个透镜(图中未示出)，对于图7所示的投影设备中各个结构的排布方式，镜头111中的各个透镜可以按照垂直纸面向外的方向依次排布。从光阀110射出的激光可以依次通过镜头111中的多个透镜射至屏幕，以实现镜头111对激光的投射，实现投影画面的显示。For example, the light valve 110 may include a plurality of reflective sheets, and each reflective sheet can be used to form a pixel in the projection image, and the light valve 110 can make the pixel that needs to be displayed in a bright state correspond to the reflective sheet according to the image to be displayed. The laser light is reflected to the lens 111 to realize the modulation of the light. The lens 111 may include a plurality of lenses (not shown in the figure). Regarding the arrangement of the various structures in the projection device shown in FIG. 7, the lenses in the lens 111 may be sequentially arranged in a direction perpendicular to the paper surface outward. The laser light emitted from the light valve 110 may be sequentially shot to the screen through a plurality of lenses in the lens 111, so as to realize the projection of the laser light by the lens 111 and realize the display of the projection screen.

可选地，请继续参考图7，投影设备还可以包括位于匀光部件109与光阀110之间的照明镜组112，经匀光部件109匀化后射出的激光可以通过照明镜组112射向光阀110。该照明镜组112可以包括反射片F、透镜T以及全内反射(total internal reflection prism，TIR)棱镜L。匀光部件109射出的激光可以射向反射片F，反射片F可以将射入的光线反射至凸透镜T，凸透镜T可以将射入的激光会聚至全内反射棱镜L，全内反射棱镜L将射入的激光反射至光阀110。Optionally, please continue to refer to FIG. 7, the projection device may further include an illumination lens group 112 located between the light homogenizing part 109 and the light valve 110, and the laser light emitted after being homogenized by the light homogenizing part 109 can be emitted through the illumination lens group 112 To the light valve 110. The illumination lens group 112 may include a reflective sheet F, a lens T, and a total internal reflection (TIR) prism L. The laser light emitted by the homogenizing component 109 can be directed to the reflective sheet F, which can reflect the incident light to the convex lens T, and the convex lens T can condense the incident laser light to the total internal reflection prism L. The total internal reflection prism L will The incident laser light is reflected to the light valve 110.

综上所述，本申请实施例提供的投影设备的投影光源中，合光镜片包括透射区和反射区，荧光轮包括第一区和第二区，激光器发出的激光可以通过合光镜片的透射区射向荧光轮，进而在射向荧光轮的第一区时激发该第一区发出荧光，该荧光在合光镜片上沿目标方向反射。激光在射向荧光轮的第二区时，被该第二区反射回合光镜片，再被合光镜片的反射区沿目标方向反射。In summary, in the projection light source of the projection device provided by the embodiment of the application, the light combining lens includes a transmission area and a reflection area, and the fluorescent wheel includes a first area and a second area. The laser light emitted by the laser can be transmitted through the light combining lens. The area is directed to the fluorescent wheel, and when directed to the first area of the fluorescent wheel, the first area is excited to emit fluorescence, and the fluorescence is reflected on the light combining lens along the target direction. When the laser is directed to the second zone of the fluorescent wheel, it is reflected by the second zone to the round light lens, and then is reflected by the reflection zone of the light combining lens along the target direction.

另外，合光镜片中透射区分别位于反射区的两侧，由于射向合光镜片的光束中间部分的光能量较高，而边缘部分的光能量较低，故即使射向合光镜片的光从透射区射出，该透出的光的能量也较小，因此投影光源的光损较小。激光器发出的每束激光通过对应的缩束部件进行缩束，可以提高各束激光的缩束效果，进而合光镜片上的透射区的尺寸可以较小，从透射区射出而无法利用的激光较少，保证了激光的利用率。荧光轮的第二区上设置有光扩散部，激光在射向荧光轮的第二区时可以经该光扩散部扩散后再射向合光镜片，扩大了该激光从荧光轮出射时的出光角度范围。由于第一区被激发出的荧光的出光角度范围较大，因此可以保证激光与荧光的出光角度范围相差较小，激光与荧光的混光效果更好，合光光斑的亮度均匀性和颜色均匀性均可得到改善，采用该混光效果更好的光形成投影画面，该投影画面的显示效果也较好。In addition, the transmission area of the light combining lens is located on both sides of the reflection area. Because the light energy of the middle part of the light beam directed to the light combining lens is higher, and the light energy of the edge part is lower, even if the light directed to the light combining lens Emitted from the transmission area, the energy of the transmitted light is also small, so the light loss of the projection light source is small. Each laser beam emitted by the laser is reduced by the corresponding beam reduction component, which can improve the beam reduction effect of each laser beam, and the size of the transmission area on the combining lens can be smaller. Less, to ensure the utilization rate of the laser. The second area of the fluorescent wheel is provided with a light diffusion part. When the laser is directed to the second area of the fluorescent wheel, it can be diffused by the light diffusion part and then directed to the light combining lens, which enlarges the light emitted by the laser from the fluorescent wheel. Angle range. Due to the large angle range of the excited fluorescence in the first zone, it can ensure that the angle of the laser and fluorescence is small, the mixing effect of laser and fluorescence is better, and the brightness uniformity and color of the combined light spot are uniform The performance can be improved, and the projection screen is formed by using the light with better light mixing effect, and the display effect of the projection screen is also better.

本申请中术语“A和B的至少一种”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和B的至少一种，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。术语“A、B和C的至少一种”表示可以存在七种关系，可以表示：单独存在A，单独存在B，单独存在C，同时存在A和B，同时存在A和C，同时存在C和B，同时存在A、B和C这七种情况。在本申请实施例中，术语“第一”和“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。术语“至少一个”指的是一个或多个，术语“多个”指两个或两个以上，除非另有明确的限定。The term "at least one of A and B" in this application is merely an association relationship describing the associated objects, indicating that there can be three types of relationships. There are three cases of A and B, and B alone. The term "at least one of A, B and C" means that there can be seven relationships, which can mean: A alone, B alone, C alone, A and B exist at the same time, A and C exist at the same time, and C and C exist at the same time. B, there are seven situations of A, B, and C at the same time. In the embodiments of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "at least one" refers to one or more, and the term "plurality" refers to two or more, unless expressly defined otherwise.

如在说明书及权利要求当中使用了某些词汇来指称特定组件，本领域技术人员应可理解，制造商可能会用不同名词来称呼同一个组件。本说明书及权利要求并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的准则。如在通篇说明书及权利要求当中所提及的“包含”为一开放式用语，故应解释成“包含但不限定于”。“大致”是指在可接受的误差范围内，本领域技术人员能够在一定误差范围内解决所述技术问题，基本达到所述技术效果。If certain words are used in the specification and claims to refer to specific components, those skilled in the art should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way of distinguishing components, but use differences in functions of components as a criterion for distinguishing. If the "include" mentioned in the entire specification and claims is an open term, it should be interpreted as "include but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range, and basically achieve the technical effect.

以上所述仅为本申请的可选实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。The above are only optional embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims

一种投影光源，其特征在于，所述投影光源包括：激光器、合光镜片、会聚透镜和荧光轮；所述合光镜片包括反射区以及分别位于所述反射区两侧的两个透射区；所述荧光轮包括第一区和第二区，所述第二区上设置有光扩散部；A projection light source, characterized in that the projection light source includes a laser, a light combining lens, a converging lens, and a fluorescent wheel; the light combining lens includes a reflection area and two transmission areas located on both sides of the reflection area; The fluorescent wheel includes a first area and a second area, and a light diffusion portion is provided on the second area;

所述激光器用于射出多束激光，所述多束激光射向所述两个透射区，所述透射区用于将射入的激光透射向所述会聚透镜；The laser is used to emit multiple laser beams, the multiple laser beams are directed to the two transmission areas, and the transmission area is used to transmit the incident laser light to the condensing lens;

所述会聚透镜用于将射入的激光会聚向所述荧光轮；The condensing lens is used to converge the incident laser light toward the fluorescent wheel;

所述荧光轮被配置为绕转轴旋转，在所述荧光轮的旋转过程中所述荧光轮中的不同区接受会聚后的激光的照射；The fluorescent wheel is configured to rotate around a rotating shaft, and during the rotation of the fluorescent wheel, different areas of the fluorescent wheel are irradiated by the focused laser;

当所述会聚后的激光射向所述第一区时，所述第一区被激发出荧光，以使所述荧光穿过所述会聚透镜射向所述反射区；When the condensed laser light is directed to the first area, the first area is excited to emit fluorescence, so that the fluorescence passes through the condensing lens and is directed toward the reflection area;

当所述会聚后的激光射向所述第二区时，所述光扩散部对所述会聚后的激光进行扩散，以使扩散后的激光穿过所述会聚透镜射向所述反射区；When the condensed laser light is directed to the second area, the light diffusing part diffuses the converged laser light so that the diffused laser light passes through the condensing lens and is directed to the reflection area;

所述反射区用于沿目标方向反射射入的光。The reflection area is used to reflect the incident light along the target direction.
根据权利要求1所述的投影光源，其特征在于，分别从所述两个透射区射出的两束激光在所述会聚透镜上形成的光斑，关于所述会聚透镜的光轴对称。The projection light source according to claim 1, wherein the light spots formed on the condensing lens by the two laser beams respectively emitted from the two transmission regions are symmetrical with respect to the optical axis of the condensing lens.
根据权利要求1或2所述的投影光源，其特征在于，所述投影光源还包括两个分光镜，每个所述分光镜用于接收所述激光器发出的激光中的部分激光，并将接收的部分激光作为一束激光反射向一个所述透射区，以将所述激光器发出的激光分为分别射向所述两个透射区的两束激光。The projection light source according to claim 1 or 2, wherein the projection light source further comprises two beam splitters, each of the beam splitters is used to receive part of the laser light emitted by the laser, and will receive Part of the laser light is reflected to one of the transmission areas as a laser beam, so as to divide the laser light emitted by the laser into two laser beams respectively directed to the two transmission areas.
根据权利要求1或2所述的投影光源，其特征在于，所述合光镜片中所述透射区的面积小于所述反射区的面积。The projection light source according to claim 1 or 2, wherein the area of the transmission area in the light combining lens is smaller than the area of the reflection area.
根据权利要求4所述的投影光源，其特征在于，所述合光镜片中每个透射区的面积小于或等于所述反射区的面积的1/4。The projection light source according to claim 4, wherein the area of each transmission area in the light combining lens is less than or equal to 1/4 of the area of the reflection area.
根据权利要求4所述的投影光源，其特征在于，所述投影光源还包括两个缩束部件，所述两个缩束部件与所述两个透射区一一对应；所述激光器射出的激光经所述缩束部件缩束后射向对应的所述透射区。The projection light source according to claim 4, wherein the projection light source further comprises two beam reduction parts, and the two beam reduction parts correspond to the two transmission areas one to one; the laser light emitted by the laser The beam is reduced by the beam reduction component and directed toward the corresponding transmission area.
根据权利要求1或2所述的投影光源，其特征在于，所述合光镜片满足以下条件中的至少一种：The projection light source according to claim 1 or 2, wherein the light combining lens satisfies at least one of the following conditions:

所述合光镜片朝向所述激光器的表面设置有增透膜；The surface of the light combining lens facing the laser is provided with an antireflection film;

所述合光镜片朝向所述激光器的表面设置有光扩散结构；The surface of the light combining lens facing the laser is provided with a light diffusing structure;

以及，所述透射区用于透射激光且反射所述荧光。And, the transmission area is used to transmit laser light and reflect the fluorescence.
根据权利要求1或2所述的投影光源，其特征在于，经所述光扩散部扩散后的激光穿过所述会聚透镜后呈平行光。The projection light source according to claim 1 or 2, wherein the laser light diffused by the light diffusion part passes through the condensing lens and then becomes parallel light.
根据权利要求1或2所述的投影光源，其特征在于，所述激光器包括多个发光芯片；The projection light source according to claim 1 or 2, wherein the laser includes a plurality of light-emitting chips;

所述激光器中的所有发光芯片同时发光；All the light-emitting chips in the laser emit light at the same time;

或者，所述激光器中的第一部分芯片和第二部分芯片交替发光；所述第一部分芯片发出的激光用于射向所述第一区，所述第二部分芯片发出的激光用于射向所述第二区。Alternatively, the first part of the chip and the second part of the chip in the laser emit light alternately; the laser emitted from the first part of the chip is used to irradiate the first area, and the laser emitted from the second part of the chip is used to irradiate all the chips. The second area.
一种投影设备，其特征在于，所述投影设备包括：权利要求1至9任一所述的投影光源，以及光阀和镜头；A projection device, characterized in that it comprises: the projection light source according to any one of claims 1 to 9, as well as a light valve and a lens;

所述投影光源用于向所述光阀发出激光，所述光阀用于将射入的激光进行调制后射向所述镜头，所述镜头用于对射入的激光进行投射以形成投影画面。The projection light source is used to emit laser light to the light valve, the light valve is used to modulate the incident laser light and then directed to the lens, and the lens is used to project the incident laser light to form a projection image .