WO2023185768A1 - 一种投影光源及投影设备 - Google Patents
一种投影光源及投影设备 Download PDFInfo
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- WO2023185768A1 WO2023185768A1 PCT/CN2023/084181 CN2023084181W WO2023185768A1 WO 2023185768 A1 WO2023185768 A1 WO 2023185768A1 CN 2023084181 W CN2023084181 W CN 2023084181W WO 2023185768 A1 WO2023185768 A1 WO 2023185768A1
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- light
- laser
- mirror
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- lens
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- 238000009792 diffusion process Methods 0.000 claims description 124
- 239000003086 colorant Substances 0.000 claims description 46
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 51
- 230000000694 effects Effects 0.000 description 34
- 238000002156 mixing Methods 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000005286 illumination Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
-
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
Definitions
- the present application relates to the field of optoelectronic technology, and in particular to a projection light source and projection equipment.
- the projection light source in the projection equipment can emit laser light of multiple colors, and a projection picture can be formed based on the laser light.
- This application provides a projection light source, including: a laser, a dimming lens group, a first light combiner mirror and a second light combiner mirror.
- the first light combiner mirror and the second light combiner mirror are located away from the laser in the dimming lens group. one side;
- the laser includes a first light emitting area, a second light emitting area and a third light emitting area for respectively emitting lasers of different colors; the second light emitting area and the third light emitting area are located on the same side of the first light emitting area in the first direction, and Arranged sequentially along the second direction, the first direction is perpendicular to the second direction; the part of the second light-emitting area located at one end away from the third light-emitting area is the second sub-area, and the part of the first light-emitting area located at one end is the second sub-area. a sub-district;
- the dimming lens group is used to adjust the laser light emitted from the first sub-area and the laser light emitted from the second sub-area so that the laser light emitted from the third light emitting area away from the second light emitting area is emitted to the first light combining mirror and the second light combining mirror respectively.
- Light mirror; the laser light emitted from the area outside the first sub-area in the first light emitting area is directed to the first light combining mirror, and the laser light emitted from the area outside the second sub-area in the second light emitting area and the third light emitting area is directed towards
- the second light combiner mirror; the first light combiner mirror and the second light combiner mirror are both used to emit the incident laser light in the first direction.
- the projection device includes: the above-mentioned projection light source, as well as a light valve and a lens;
- the projection light source is used to emit laser light toward the light valve, the light valve is used to modulate the incoming laser light and then emit it toward the lens, and the lens is used to project the incoming laser light to form a projection image.
- Figure 1 is a schematic structural diagram of a projection light source provided by related technologies
- Figure 2 is a schematic diagram of a light spot formed by a laser emitted by a light combining lens group provided by the related art
- Figure 3A is a schematic structural diagram of a projection light source provided by an embodiment of the present application.
- Figure 3B is a schematic structural diagram of a projection light source provided by an embodiment of the present application.
- Figure 4A is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
- Figure 4B is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
- Figure 5A is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application.
- Figure 5B is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application.
- Figure 6A is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
- Figure 6B is a schematic structural diagram of another projection light source provided by an embodiment of the present application.
- Figure 7A is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by an embodiment of the present application;
- Figure 7B is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by an embodiment of the present application.
- Figure 7C is a schematic diagram of a spot formed by laser light emitted by yet another projection light source provided by an embodiment of the present application.
- Figure 8A is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
- Figure 8B is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
- Figure 8C is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
- Figure 9 is a schematic structural diagram of a laser provided by an embodiment of the present application.
- Figure 10 is a schematic structural diagram of another laser provided by an embodiment of the present application.
- Figure 11 is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by the related art
- Figure 12A is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
- Figure 12B is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
- Figure 13A is a schematic structural diagram of yet another projection light source provided by another embodiment of the present application.
- Figure 13B is a schematic structural diagram of yet another projection light source provided by another embodiment of the present application.
- Figure 14 is a schematic structural diagram of yet another projection light source provided by another embodiment of the present application.
- Figure 15 is a schematic structural diagram of a projection light source provided by yet another embodiment of the present application.
- Figure 16 is a schematic structural diagram of another projection light source provided by yet another embodiment of the present application.
- Figure 17 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
- the projection light source in the projection equipment is used to emit lasers of multiple colors.
- FIG. 1 is a schematic structural diagram of a projection light source provided by the related art.
- the projection light source 00 includes a laser 01 and a light combining lens group 02 .
- the laser 00 may include two rows of light-emitting chips, one row of light-emitting chips is used to emit red laser light, part of the light-emitting chips in the other row is used to emit green laser light, and the remaining part of the light-emitting chips are used to emit blue laser light.
- the light combining lens group 02 may include two light combining lenses, each light combining lens is located on the light exit side of a row of light emitting chips, and is used to emit the laser light emitted by the row of light emitting chips along the z direction along the x direction to achieve the purpose of emitting light to the laser 01 Mixture of various colors of laser light.
- the laser in the projection light source after the laser in the projection light source is emitted through the light combining lens group, it also needs to be homogenized by the homogenizing component before subsequent image projection.
- the distribution position of the light spot can reflect its incident angle on the uniform light component. The closer the light spot is to both ends, the greater the incident angle, and the closer the light spot is to the center, the smaller the incident angle.
- the spot formed by the laser on the uniform light component is similar to the spot shown in Figure 2. Since the incident angles of the red laser, green laser and blue laser on the uniform light component are quite different, the uniform light component has different effects on lasers of different colors. The homogenization effect varies greatly, and the display effect of the projection screen based on laser formation is poor.
- Embodiments of the present application provide a projection light source and projection equipment.
- the lasers of various colors emitted by the projection light source have high symmetry, good light mixing effects, and can form projection images with good display effects.
- the projection light source 10 may include: a laser 101 , a dimming lens group 102 , a first light combining mirror 103 and a second light combining mirror 104 .
- the laser 101 can emit laser light in a third direction (eg, z-direction).
- the dimming mirror group 102, the first light combining mirror 103 and the second light combining mirror 104 are all located on the light exit side of the laser 101, and the first light combining mirror 103 and the second light combining mirror 104 are located away from the laser in the dimming mirror group 102. side of 101.
- the laser 101 may include a first light emitting area Q1, a second light emitting area Q2, and a third light emitting area Q3. Each light emitting area is used to emit laser light of one color, and the colors of laser light emitted by different light emitting areas are different.
- the second light emitting area Q2 and the third light emitting area Q3 are located on the same side of the first light emitting area Q1 in the first direction (eg, x direction).
- the second light emitting area Q2 and the third light emitting area Q3 are arranged sequentially along the second direction (such as the y direction), the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to the third direction.
- the first light emitting area Q1 may be in a rectangular shape.
- the first direction may be the length direction of the rectangle, and the second direction may be the width direction of the rectangle.
- the second light emitting area Q2 and the third light emitting area Q3 are both located on the right side of the first light emitting area Q1, the second light emitting area Q2 and the first light emitting area Q1, and the third light emitting area Q3 and the first light emitting area Q1 are arranged sequentially along the x-direction.
- the second light emitting area Q2 and the third light emitting area Q3 can also be located on the left side of the first light emitting area Q1, the second light emitting area Q2 and the first light emitting area Q1, and the third light emitting area Q3 and
- the first light emitting areas Q1 can also be arranged sequentially in the opposite direction of the x direction.
- the positions of the second light emitting area Q2 and the third light emitting area Q3 in FIG. 3A can also be exchanged with each other, and accordingly the second direction can be the opposite direction of the y direction.
- the first light combining lens 103 may correspond to the first light emitting area Q1
- the second light combining lens 104 may correspond to the second light emitting area Q2 and the third light emitting area Q3.
- the first light combining lens 103 and the second light combining lens 104 may be arranged along the first direction.
- the laser light emitted from the first light emitting area Q1 can all be transmitted to the first light combining mirror 103
- the laser light emitted from the second light emitting area Q2 and the third light emitting area Q3 can all be transmitted to the second light combining mirror 104 .
- the first light combining mirror 103 and the second light combining mirror 104 can further adjust the transmission direction of the incident laser light to achieve mixing of the laser light emitted from each light emission area.
- the part of the second light-emitting area Q2 located at one end away from the third light-emitting area Q3 may be a second sub-area (not marked in the figure), and the part of the first light-emitting area Q1 located at this end is the first sub-area. (Not marked in the picture).
- the first sub-region and the second sub-region are respectively the partial regions located at the same end of the first light-emitting region Q1 and the second light-emitting region Q2.
- the first sub-region and the second sub-region may be aligned in the first direction.
- one end of the first sub-region and the second sub-region close to other regions in the light emitting region is aligned in the first direction.
- the areas of the first sub-area and the second sub-area may be equal or unequal, which are not limited in the embodiment of this application.
- the orthographic projection of the dimming lens group 102 on the laser 101 can cover the first sub-area in the first light-emitting area Q1 and the second sub-area in the second light-emitting area Q2.
- the first sub-area and the second sub-area emit The laser light can be directed toward the dimming lens group 102 along a third direction.
- the dimming lens group 102 can adjust the laser light emitted from the first sub-area to be emitted from the side of the third light emitting area Q3 away from the second light emitting area Q2 toward the first light combining mirror 103; the dimming lens group 102 can also adjust the third light emitting area Q3 to the first light combining mirror 103.
- the laser light emitted from the second sub-area is adjusted to be emitted to the second light combining mirror 104 from the side of the third light emitting area Q3 away from the second light emitting area Q2.
- the laser light emitted from the area outside the first sub-area in the first light emitting area Q1 can be directly emitted to the first light combining mirror 103, and the laser light emitted from the area outside the second sub-area in the second light emitting area Q2 and the third light emitting area Q3
- the laser light can be directly emitted to the second light combining mirror 104 .
- the first light combining lens 103 and the second light combining lens 104 are arranged sequentially along the first direction or its opposite direction. On a reference plane perpendicular to the first direction, the orthographic projection of the first light combining mirror 103 and the orthographic projection of the second light combining mirror 104 at least partially coincide.
- the first light combining mirror 103 and the second light combining mirror 104 are both used to emit the incident laser light in the first direction. It should be noted that the reference plane described in this application is only an imaginary plane used to describe the position and size relationship between various devices, and may not be an actual plane in the projection light source.
- the first direction is the x direction; the second light emitting area Q2 and the first light emitting area Q1, the third light emitting area Q3 and the first light emitting area Q1, and the second light combining mirror 104 and the first light combining mirror 103 They are all arranged sequentially along the x direction; the first light combining mirror 103 and the second light combining mirror 104 are both used to emit laser light along the x direction, for example.
- the first direction may also be the opposite direction of the x direction; the second light emitting area Q2 and the first light emitting area Q1, the third light emitting area Q3 and the first light emitting area Q1, and the second light combining mirror 104 and the third light emitting area Q1.
- a light combining mirror 103 can still be arranged along the x direction; the first light combining mirror 103 and the second light combining mirror 104 can emit laser light in the opposite direction of the x direction.
- the laser emitted from the first light emitting area Q1 is called the first laser
- the laser emitted from the second light emitting area Q2 is called the second laser
- the laser emitted from the third light emitting area Q3 is called the third laser.
- the first light combining mirror 103 is a dichroic mirror
- the second light combining mirror 104 is a full-band reflector.
- the second light combining mirror 104 can reflect the incident second laser light and the third laser light toward the first light combining mirror 103 along the first direction.
- the first light combining lens 103 can transmit the second laser light and the third laser light emitted by the second light combining lens 104 along the first direction, and reflect the first laser light along the first direction.
- the second light combining mirror 104 may also be a dichroic mirror.
- the second light combining mirror 104 only needs to be able to reflect the second laser light and the third laser light, and can transmit or reflect laser light of other colors.
- FIG. 7A is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by an embodiment of the present application.
- the light spot may be a light spot formed by the laser light after the first light combining mirror 103 and the second light combining mirror 104 emit the incident laser light in the first direction.
- the light spot G1 in FIG. 7A is the light spot formed by the laser light from the first light emitting area Q1
- the light spot G2 is the light spot formed by the laser light originating from the second light emitting area Q2
- the light spot G3 is the light spot formed by the laser light originating from the third light emitting area Q3. light spot.
- the symmetry of lasers of various colors about the main optical axis of the projection light source is good, and the distribution uniformity of lasers of various colors is high.
- the laser light emitted from the second light emitting area Q2 is divided into two parts, and the two parts of laser light are respectively located on both sides of the laser light emitted from the third light emitting area Q3.
- the light spots formed by the two parts of laser light are respectively located on both sides of the light spot formed by the laser light emitted from the third light emitting area Q3.
- the difference in the incident angles of the second laser and the third laser when they enter the subsequent homogenizing component can be smaller, and the uniformity of the homogenizing effect of the second laser and the third laser by the homogenizing component can be better.
- the light mixing effect of the third laser can be better.
- the dimming lens group 102 when adjusting the second laser beam, also adjusts part of the laser beam at one end of the first laser beam to the other end. This can ensure that the irradiation position of the first laser in the first light combining mirror 103 has a small deviation from the irradiation positions of the second laser and the third laser in the second light combining mirror 104 . Furthermore, after the first light combining mirror 103 and the second light combining mirror 104 emit the incident laser light in the first direction, the symmetry of the laser light of various colors with respect to the main optical axis of the projection light source is better, and the laser light of different colors has better symmetry. The centers can be close to or even coincident, which can ensure a better light mixing effect for lasers of various colors emitted by the projection light source.
- the dimming lens group can adjust the laser light emitted from the first sub-area at one end of the first light-emitting area and the laser light emitted from the second sub-area at the same end of the second light-emitting area.
- the side of the third light exit area away from the second light exit area radiates to the first light combiner mirror and the second light combiner mirror respectively.
- the laser from the second light emitting area is emitting
- the second light combining mirror can be located on both sides of the laser light emitted from the third light exit area, thereby improving the symmetry between the laser light from the second light exit area and the laser light from the third light exit area.
- the symmetry and light mixing uniformity of the lasers of various colors after being mixed by the first light combining mirror and the second light combining mirror are high, and the display effect of the projection screen formed based on the laser light can be better.
- the dimming lens group 102 in the embodiment of the present application will be introduced below with reference to the accompanying drawings.
- the dimming mirror group 102 may include a first dimming mirror 1021 and a second dimming mirror 1022 sequentially arranged along the second direction.
- the orthographic projection of the first dimming mirror 1021 on the laser 101 covers the first sub-area in the first light-emitting area Q1 and the second sub-area in the second light-emitting area Q2.
- the orthographic projection of the second dimming mirror 1022 on the laser 101 is located outside the third light emitting area Q3 and is located on the side of the third light emitting area Q3 away from the second light emitting area Q2.
- the laser light emitted from the first sub-region and the second sub-region can both be directed to the first dimming mirror 1021.
- the first dimming mirror 1021 is used to reflect the incident laser to the second dimming mirror 1022.
- the second dimming mirror 1022 1022 is used to reflect the incident laser light originating from the first sub-region to the first light combining mirror 103 and to reflect the incident laser light originating from the second sub-region towards the second light combining mirror 104 .
- the first dimming mirror 1021 and the second dimming mirror 1022 are both integral lenses. Both the first dimming mirror 1021 and the second dimming mirror 1022 may be rectangular, and the length direction of the rectangle may be parallel to the first direction. Both the first dimming mirror 1021 and the second dimming mirror 1022 can be arranged at an angle, and the first dimming mirror 1021 and the second dimming mirror 1022 are parallel.
- the second dimming mirror 1022 and the laser 101 are located on the same side of the first dimming mirror 1021 to ensure that the first dimming mirror 1021 can reflect the laser light emitted by the laser 101 from the first dimming mirror 1021 to the second dimming mirror 1022 .
- the first dimming mirror 1021, the first dimming mirror 103 and the second dimming mirror 104 are located on the same side of the second dimming mirror 1022 to ensure that the second dimming mirror 1022 can absorb the laser emitted by the first dimming mirror 1021. Reflected to the first light combining mirror 103 and the second light combining mirror 104 .
- the angle between the first dimming mirror 1021 and the second dimming mirror 1022 and the second direction can both be 45 degrees, and the angle between the first dimming mirror 1021 and the second dimming mirror 1022 and the third direction can also be both 45 degrees.
- the size of the first dimming mirror 1021 and the second dimming mirror 1022 can be designed according to the size of the spot formed by the received laser. Each dimming mirror needs to ensure that the size is greater than or equal to the spot formed by the received laser. size of.
- the size and arrangement of the first dimming mirror 1021 and the second dimming mirror 1022 may be the same.
- the overall length of the light spot formed by the laser emitted from the second sub-region on the first dimming mirror 1021 may range from 2.5 mm to 3.5 mm, and the overall width may range from 1.5 mm to 2.5 mm, such as The overall size of the light spot can be approximately 3 mm x 2 mm.
- the size of the spot formed by the laser light emitted from the first sub-region on the first dimming mirror 1021 is small compared with the light spot size formed by the laser light emitted from the second sub-region on the first dimming mirror 1021 .
- the length of the first dimming mirror 1021 and the second dimming mirror 1022 may range from 9 mm to 10 mm, and the width may range from 1.5 mm to 3 mm.
- the size of the first dimming mirror 1021 and the second dimming mirror 1022 can be 10 mm*2 mm.
- both the first dimming mirror 1021 and the second dimming mirror 1022 may include multiple individual lenses.
- FIG. 8A is a schematic structural diagram of a projection light source provided by another embodiment of the present application.
- the first dimming mirror 1021 includes a first sub-mirror J1 and a second sub-mirror J2
- the second dimming mirror 1022 includes a third sub-mirror J3 and a fourth sub-mirror J4.
- the orthographic projection of the first sub-mirror J1 on the laser 101 covers the first sub-area
- the orthographic projection of the second sub-mirror J2 on the laser 101 covers the second sub-area.
- the first sub-lens J1 and the third sub-lens J3 can be arranged in sequence along the second direction
- the second sub-lens J2 and the fourth sub-lens J4 can also be arranged in sequence along the second direction.
- the first sub-lens J1, the second sub-lens J2, the third sub-lens J3 and the fourth sub-lens J4 can all be tilted.
- the four sub-mirrors can all be parallel.
- the laser 101 and the third lens J3 are located on the same side of the first sub-mirror J1, and the first sub-lens J1 and the first light combining lens 103 are located on the same side of the third sub-lens J3. In this way, the laser emitted from the first sub-area can be directed to the first sub-mirror J1, the first sub-mirror J1 is used to reflect the incident laser to the third sub-mirror J3, and the third sub-mirror J3 is used to reflect the incident laser.
- the laser 101 and the fourth sub-mirror J4 are located on the same side of the second sub-mirror J2, and the second sub-mirror J2 and the second light combining lens 104 are located on the same side of the fourth sub-mirror J4.
- the laser emitted from the second sub-area can be directed to the second sub-mirror J2
- the second sub-mirror J2 is used to direct the incident laser to the fourth sub-mirror J4
- the fourth sub-mirror J4 is used to direct the incident laser to the fourth sub-mirror J4.
- Reflected to the second light combining mirror 104 the angles between the four sub-lenses and the second direction can all be 45 degrees
- the angles between the four sub-lenses and the third direction can also be all 45 degrees.
- the size of each sub-lens can be determined according to the spot size formed by the received laser light.
- the size and arrangement of the first sub-lens J1, the second sub-lens J2, the third sub-lens J3 and the fourth sub-lens J4 may be the same. If the four sub-lenses are all rectangular, the length direction of the rectangle can be parallel to the first direction.
- the length of each sub-lens may range from 2.5 mm to 4 mm, and the width may range from 1.5 mm to 3 mm.
- the size of each sub-lens may be approximately 3 mm*2 mm.
- the spot size formed by the laser emitted from the first sub-region may be different from the spot size formed by the laser emitted from the second sub-region, and further the sizes of the first sub-mirror J1 and the second sub-mirror J2 may be different.
- the difference between the first sub-lens J1 and the third sub-lens J3 is The sizes can be the same, and the sizes of the second sub-lens J2 and the fourth sub-lens J4 can be the same.
- the dimming mirror in the embodiment of the present application may be a reflecting mirror.
- the dimming mirror can be made of metal or can be obtained by coating a transparent lens with a reflective film.
- the dimming mirror can also be a dichroic mirror. It only needs to be ensured that the dimmer mirror can emit the incident laser in the desired direction. Whether the laser of other colors can be transmitted is not considered.
- Figure 3B is a schematic structural diagram of a projection light source provided by an embodiment of the present application
- Figure 4B is a schematic structural diagram of another projection light source provided by an embodiment of the present application
- Figure 5B is yet another projection provided by an embodiment of the present application. Structural diagram of the light source.
- FIG. 4B may be a right view of the projection light source shown in FIG. 3B
- FIG. 5B may be a top view of the projection light source shown in FIG. 3B .
- the projection light source 10 may include a laser 101 and a The first light combiner mirror 102', the second light combiner mirror 103', the third light combiner mirror 104', the fourth light combiner mirror 105 and the fifth light combiner mirror 106 on the light output side of the laser 101.
- the laser 101 can emit laser light in a third direction (eg, z-direction).
- the laser 101 may include a first light emitting area Q1, a second light emitting area Q2, and a second light emitting area Q2.
- Each light emitting area is used to emit laser light of one color, and the colors of laser light emitted by different light emitting areas are different.
- the second light emitting area Q2 and the second light emitting area Q2 are located on the same side of the first light emitting area Q1 in the first direction (eg, x direction).
- the second light emitting area Q2 and the second light emitting area Q2 are arranged sequentially along the second direction (such as the y direction), the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to the third direction.
- the first light emitting area Q1 may be in a rectangular shape.
- the first direction may be the length direction of the rectangle, and the second direction may be the width direction of the rectangle.
- the second light emitting area Q2 and the second light emitting area Q2 are both located on the right side of the first light emitting area Q1, the second light emitting area Q2 and the first light emitting area Q1, and the second light emitting area Q2 and the first light emitting area Q1.
- the light emitting areas Q1 are all arranged sequentially along the x direction.
- the second light emitting area Q2 and the second light emitting area Q2 can also be located on the left side of the first light emitting area Q1, the second light emitting area Q2 and the first light emitting area Q1, and the second light emitting area Q2 and the first light emitting area Q1.
- the first light emitting areas Q1 can also be arranged sequentially in the opposite direction of the x direction.
- the positions of the second light emitting area Q2 and the second light emitting area Q2 in FIG. 3B and FIG. 5B can also be exchanged with each other, and accordingly the second direction can be the opposite direction of the y direction.
- the first light combining mirror 102', the second light combining mirror 103', and the third light combining mirror 104' may correspond to the first light emitting area Q1, the second light emitting area Q2, and the second light emitting area Q2 in sequence.
- the orthographic projection of each of the three light combining mirrors on the laser 101 can cover the corresponding light emission area.
- the positional relationship of the three light combining mirrors can be referred to the above introduction to the positional relationship of the three light emission areas. The embodiments of this application will not be described again in detail.
- the orthographic projection of the first light combining mirror 102' on the laser 101 can cover the first light emitting area Q1
- the orthographic projection of the second light combining mirror 103' on the laser 101 can cover the second light emitting area Q2
- the third light combining mirror 103' can cover the second light emitting area Q2.
- the orthographic projection of the mirror 103' on the laser 101 can cover the second light emission area Q2.
- Each light output area is used to emit laser light to the corresponding light combining mirror.
- the first light emitting area Q1 is used to emit laser light to the first light combining mirror 102'
- the second light emitting area Q2 is used to emit laser light to the second light combining mirror 103'
- the second light emitting area Q2 is used to emit laser light to the third light combining mirror 103'.
- Mirror 104' emits laser light.
- the first light combiner 102' and the fourth light combiner 105 are arranged sequentially along the second direction, and the second light combiner 103', the third light combiner 104' and the fifth light combiner 106 Also arranged in sequence along the second direction.
- the orthographic projections of the first light combiner 102' and the fourth light combiner 105 at least partially coincide, and the second light combiner 103', the third light combiner 104' and the fifth light combiner 105'
- the orthographic projections of the light mirror 106 are at least partially coincident.
- the reference plane described in this application is only an imaginary plane used to describe the position and size relationship between various devices, and may not be an actual plane in the projection light source.
- Each light combiner can be tilted.
- the laser 101 and the fourth light combining mirror 105 can be located at the first light combining mirror 102'
- the first light combining mirror 102 ′ is used to reflect the laser light emitted from the first light output area of the laser 101 toward the fourth light combining mirror 105 along the second direction.
- the laser 101 and the third light combining mirror 104' are located on the same side of the second light combining mirror 103'.
- the second light combining mirror 103' is used to reflect the laser light emitted from the second light output area of the laser 101 along the second direction to the third light combining mirror.
- Combined light lens 104' is used to reflect the laser light emitted from the second light output area of the laser 101 along the second direction to the third light combining mirror.
- the laser 101 and the fifth optical mirror 106 are located on the same side of the third optical combining mirror 104'.
- the third light combining mirror 104' may be a dichroic mirror.
- the third light combiner 104' is used to reflect the laser light emitted from the third light output area of the laser 101 to the fifth light combiner 106 along the second direction.
- the third light combiner 104' can also reflect the second light combiner 103'.
- the emitted laser light is transmitted to the fifth light combining mirror 106 along the second direction. In this way, the laser light emitted from the second light emitting area and the laser light emitted from the third light emitting area can be mixed after the third light combining mirror 104'.
- the x direction is taken as the first direction as an example.
- the fifth light combining lens 106 and the fourth light combining lens 105 can be arranged sequentially along the x direction. On a reference plane perpendicular to the first direction, the orthographic projections of the fifth light combining mirror 106 and the fourth light combining mirror 105 at least partially coincide.
- Both the fifth light combining mirror 106 and the fourth light combining mirror 105 can be arranged at an angle, and the fourth light combining mirror 105 and the third light combining mirror 104' can be located on the same side of the fifth light combining mirror 106.
- the fifth light combining mirror 106 can reflect the laser light emitted by the third light combining mirror 104' to the fourth light combining mirror 105 along the x direction.
- the fourth light combining mirror 105 is a dichroic mirror.
- the fourth light combiner 105 can transmit the laser light emitted by the fifth light combiner 106 along the x direction, and the fourth light combiner 105 can also reflect the laser light emitted by the first light combiner 102' along the x direction.
- the first direction may be the opposite direction of the x direction
- the fifth light combining lens 106 and the fourth light combining lens 105 may still be arranged sequentially along the x direction.
- the tilt direction of the fifth light combiner 106 and the fourth light combiner 105 can be adjusted.
- the fifth light combiner 106 and the fourth light combiner 105 can be flipped 90 degrees in the plane where the x direction and the y direction are located.
- the fifth light combining mirror 106 can be a dichroic mirror.
- FIG. 6B is a schematic structural diagram of yet another projection light source provided by an embodiment of the present application. As shown in FIG.
- the fourth light combining mirror 105 can reflect the laser light to the fifth light combining mirror 106 , and the laser light can be emitted in the opposite direction of the x direction through the fifth light combining mirror 106 .
- the fifth light combining mirror 106 can reflect the laser light emitted by the third light combining mirror 104' in the opposite direction of the x direction.
- FIG. 7B is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by an embodiment of the present application.
- the light spot may be a light spot formed by the laser light after the fifth light combining mirror 106 and the fourth light combining mirror 105 emit the incident laser light in the first direction.
- the light spot G1 in FIG. 7B is the light spot formed by the laser light originating from the first light emitting area
- the light spot G2 is the light spot formed by the laser light originating from the second light emitting area
- the light spot G3 is the light spot formed by the laser light originating from the third light emitting area.
- the symmetry of the lasers of various colors about the main optical axis of the projection light source is good, and the distribution uniformity of the lasers of various colors is high.
- the second light emitting area Q2 is first passed through the second light combining mirror 103' and the third light combining mirror 104'.
- the laser light emitted (referred to as the second laser light for short) and the laser light emitted by the third light emitting area Q3 (referred to as the third laser light for short) are combined in the second direction, so that the second laser light can be combined.
- the laser and the third laser are adjusted to have a higher center overlap.
- the mixed second laser light and the third laser light are mixed with the laser light emitted by the first light output area Q1 and then the Emitting in one direction can ensure that the three lasers have good symmetry about the main optical axis of the projection light source, and the laser distribution of various colors has high uniformity, which improves the light mixing effect.
- the first light combining mirror 102' and the second light combining mirror 103' may be full-band reflecting mirrors, or may also be dichroic mirrors.
- the first light combiner mirror 102', the second light combiner mirror 103' and the third light combiner mirror 104' can all be at the same distance from the laser 101 in the third direction.
- the distance may refer to the distance between the center position of the light combining lens and the laser 101 .
- the laser light emitted by the second light emitting area and the third light emitting area arranged along the second direction can be first placed in the second light combining mirror and the third light combining mirror. Combining light in two directions improves the symmetry between the laser light originating from the second light emitting area and the laser light originating from the third light emitting area.
- the lasers of various colors emitted by the laser are mixed and emitted along the first direction, ensuring that the lasers of various colors emitted by the projection light source are The symmetry and light mixing uniformity are high, and the display effect of the projection screen formed based on this laser can be better.
- the fourth light combining lens 102' and the fifth light combining lens 106 are both integral lenses.
- the first light combining mirror 102', the second light combining mirror 103' and the third light combining mirror 104' may all be parallel.
- the angles between the three light combining mirrors and the second direction may all be 45 degrees, and the angles between the three light combining mirrors and the third direction may also be 45 degrees.
- the second light emitting area Q2 may include two light emitting chips, and the second laser emitted from the second light emitting area Q2 may form two small light spots.
- the third light emitting area Q3 may include three light emitting chips, and the third laser emitted from the third light emitting area Q3 may form three small light spots. The two small light spots and the three small light spots can be arranged in a staggered manner.
- FIG. 8B is a schematic structural diagram of a projection light source provided by another embodiment of the present application
- FIG. 8C is a structural diagram of yet another projection light source provided by another embodiment of the present application. Schematic diagram.
- FIG. 8C may be a right view of the projection light source shown in FIG. 8B.
- the second light combining mirror 103 ′ may include a plurality of first sub-mirrors J1 arranged sequentially along the second direction, and different first sub-mirrors J1 have different distances from the laser 101 .
- the third light combining mirror 104' includes a plurality of second sub-mirrors J2 arranged sequentially along the second direction, and different second sub-mirrors J2 are at different distances from the laser 101.
- the second light combining lens 103' includes two first sub-lenses J1, and a third The light combining lens 103' includes three second sub-lenses J2 as an example.
- the orthographic projections of the first sub-mirror J1 and the second sub-mirror J2 closest to the laser 101 on the fifth light combining mirror 106 at least partially overlap, and the first sub-mirror J1 and the second sub-mirror J2 farthest from the laser 101 are at least partially coincident.
- the orthographic projections on the fifth light combining mirror 106 at least partially coincide.
- the laser beams emitted from the first sub-mirror J1 and the second sub-mirror J2 closest to the laser 101 coincide with each other, and the laser beams emitted from the first sub-mirror J1 and the second sub-mirror J2 farthest from the laser 101 also overlap, thus ensuring that the laser beam originating from the second sub-mirror J1 and J2 are also coincident.
- the difference in the overall range of the spot formed by the laser from the second light-emitting area Q2 and the laser from the third light-emitting area Q3 is small, which improves the symmetry of the two lasers.
- the height of each sub-lens can be further designed so that the laser light from the second light exit area Q2 and the laser light from the third light exit area Q3 form the edge of the light spot, closer to the edge of the light spot.
- the distance between the first sub-mirror J1 and the second sub-mirror J2 closest to the laser 101 and the laser 101 can be equal to the distance from the laser 101 to the small spot on the first light combiner 102' that is closest to the laser 101.
- the distance between the first sub-mirror J1 and the second sub-mirror J2 farthest from the laser 101 from the laser 101 equal to the distance from the laser 101 to the small spot on the first light combiner 102' that is farthest from the laser 101.
- FIG. 7C is a schematic diagram of a light spot formed by laser light emitted by yet another projection light source provided by an embodiment of the present application.
- the light spot G2 formed by the laser from the second light emitting area Q2 and the light spot G3 formed by the laser from the third light emitting area Q3 are both relatively close to the light spot G1 formed by the laser from the first light emitting area Q1 size.
- the symmetry of lasers of various colors about the main optical axis of the projection light source is good, and the distribution uniformity of lasers of various colors is high.
- the edge fit of light spot G1, light spot G2 and light spot G3 is relatively high.
- the size of each sub-lens can be determined according to the spot size formed by the received laser light.
- the first sub-lens J1 and the second sub-lens J2 may have the same size and arrangement. If the sub-lenses are all rectangular, the length direction of the rectangle can be parallel to the first direction.
- the length of each sub-lens may range from 2.5 mm to 4 mm, and the width may range from 1.5 mm to 3 mm.
- the size of each sub-lens may be approximately 3 mm*2 mm.
- the second light combining lens 103' and the third light combining lens 104' are divided into multiple sub-lenses as an example. In a specific implementation, only one of the second light combining lens 103' and the third light combining lens 104' may be divided into multiple sub-lenses. In a specific implementation, the first light combiner lens 101 can also be divided into multiple sub-lenses. The sub-lenses of the first light combiner mirror 101 can be divided in the same way as the second light combiner mirror 103' and the third light combiner mirror 104'. Same, the embodiment of this application does not Again.
- the laser 101 in the embodiment of the present application may be a multicolor laser.
- Multicolor lasers are lasers that can emit laser light of multiple colors.
- Figure 9 is a schematic structural diagram of a laser provided by an embodiment of the present application.
- Figure 10 is a schematic structural diagram of another laser provided by an embodiment of the present application.
- FIG. 9 may be a top view of the laser shown in FIG. 10
- FIG. 10 may be a schematic diagram of cross-section a-a’ of the laser shown in FIG. 9 .
- the laser 101 may include a base plate 1011 and two light-emitting modules (not marked in the figure).
- the orthographic projection of a certain device (such as a dimming mirror or a light combining mirror) on the laser 101 described in the embodiments of this application may refer to the orthographic projection of the device on the base plate 1011 of the laser 101 .
- Each light-emitting module may include an annular tube wall 1012 and a plurality of light-emitting chips 1013 surrounded by the tube wall 1012 .
- each light-emitting module may be in the shape of a strip, and the orthographic projection of each light-emitting module on the base plate 1011 may be approximately rectangular.
- the length direction of the rectangle can be parallel to the second direction, and the width direction can be parallel to the first direction.
- the plurality of light-emitting chips 1013 in each light-emitting module may be arranged in at least one row along the first direction.
- the plurality of light-emitting chips are arranged in only one row as an example; in a specific implementation, the plurality of light-emitting chips can also be arranged in multiple rows, such as two rows or three rows, which is not the case in the embodiment of the present application. limited.
- the slow axes of the lasers emitted by the plurality of light-emitting chips 1013 in each light-emitting module may be parallel to the first direction.
- the transmission speed of laser in different light vector directions will be different.
- the light vector direction with fast transmission speed is the fast axis
- the light vector direction with slow propagation speed is the slow axis
- the fast axis is perpendicular to the slow axis.
- the fast axis can be perpendicular to the surface of the light-emitting chip 1013
- the slow axis can be parallel to the surface of the light-emitting chip 1013.
- the fast axis is the z direction and the slow axis is the y direction.
- the divergence angle of the laser on the fast axis is greater than the divergence angle on the slow axis.
- the divergence angle on the fast axis is basically more than three times the divergence angle on the slow axis.
- the light-emitting chips 1013 are arranged with the slow axis of the emitted laser light as the arrangement direction. Since the divergence angle of the laser in this direction is small, on the basis of avoiding interference overlap of the lasers emitted by adjacent light-emitting chips 1013, the distance between the light-emitting chips 1013 can be smaller, and the arrangement density of the light-emitting chips 1013 can be larger, so that Conducive to the miniaturization of lasers.
- the plurality of light-emitting chips 1013 in the light-emitting module can also be arranged in an array and arranged in multiple rows and columns, which is not limited by the embodiment of the present application.
- Each light-emitting module may also include a collimating lens group 1014, a plurality of heat sinks 1015, a plurality of reflective prisms 1016 and a light-transmitting sealing layer 1018.
- the plurality of heat sinks 1015 and the plurality of reflective prisms 1016 may each correspond to the plurality of light-emitting chips 1013 in the light-emitting module.
- Each light-emitting chip 1013 is located on a corresponding heat sink 1015, and the heat sink 1015 is used to assist the corresponding light-emitting chip 1013 in dissipating heat.
- the material of heat sink 1015 may include ceramic.
- Each reflective prism 1016 is located on the light exit side of the corresponding light emitting chip 1013 .
- the light-transmitting sealing layer 1018 is located on the side of the tube wall 1012 away from the bottom plate 1011 for sealing.
- the sealing tube wall 1012 is an opening on a side away from the bottom plate 1011, so as to form a sealed space together with the bottom plate 1011 and the tube wall 1012.
- the laser 101 may not include the light-transmitting sealing layer 1018, but the collimating lens group 1014 may be directly fixed to the surface of the tube wall 1012 away from the bottom plate 1011. In this way, the collimating lens group 1014, the tube wall 1012 and the bottom plate 1011 together form a sealed space.
- the collimating lens group 1014 is located on the side of the light-transmitting sealing layer 1018 away from the base plate 1011 .
- the collimating lens group 1014 includes a plurality of collimating lenses (not marked in the figure) corresponding to the plurality of light-emitting chips 1013.
- each collimating lens in each collimating lens group 1014 can be integrally formed.
- the collimating lens group 1014 is roughly plate-shaped.
- the side of the collimating lens group 1014 close to the base plate 1011 is flat, and the side away from the base plate 1011 has a plurality of convex arc surfaces.
- Each of the plurality of convex arc surfaces has a convex arc surface.
- the part where the surface is located is a collimating lens.
- the light-emitting chip 1013 can emit laser light to the corresponding reflective prism 1016, and the reflective prism 1016 can reflect the laser light to the collimating lens corresponding to the light-emitting chip 1013 in the collimating lens group 1014 in a direction away from the base plate 1011 (such as the z direction). Then the laser can be collimated by the collimating lens and then emitted. It should be noted that after the laser light emitted by the light-emitting chip 1013 is adjusted by the collimating lens, the divergence angle of the laser light on the fast axis can be smaller than the divergence angle on the slow axis.
- the light-emitting chips 1013 in different light-emitting modules in the laser 101 can be used to emit laser light of different colors. It should be noted that the light-emitting chips can be divided according to the color of the light emitted. Each type of light-emitting chips can emit laser light of one color, and different types of light-emitting chips are used to emit laser light of different colors. In this embodiment of the present application, different light-emitting modules in the laser 101 may include different types of light-emitting chips. Each light-emitting module may include only one type of light-emitting chips, or there may be a light-emitting module including multiple types of light-emitting chips.
- the laser 101 may include a first light-emitting module and a second light-emitting module.
- the first light-emitting module may be the light-emitting module on the left side in Figure 9.
- the second light-emitting module The module can be the light-emitting module located on the right side in Figure 9.
- the first light-emitting module may include a plurality of first-type light-emitting chips 1013a
- the second light-emitting module may include a plurality of second-type light-emitting chips 1013b and a plurality of third-type light-emitting chips 1013c.
- the wavelengths of the lasers emitted by the first type of light-emitting chip 1013a, the second type of light-emitting chip 1013b and the third type of light-emitting chip 1013c decrease in sequence.
- the first type of light-emitting chip 1013a is used to emit red laser light
- the second type of light-emitting chip 1013b is used to emit blue laser light
- the third type of light-emitting chip 1013c is used to emit green laser light. That is, the first laser is a red laser, the second laser is a blue laser
- the third laser is a green laser.
- the laser light emitted by the third type of light-emitting chip can also be of other colors.
- the third type of light-emitting chip 1013b is used to emit yellow laser light, which is not limited in the embodiment of this application.
- the number of first-type light-emitting chips 1013a in the first light-emitting module is 4, the number of second-type light-emitting chips 1013b in the second light-emitting module is 3, and the number of third-type light-emitting chips 1013c is 3.
- the quantity is 2 as an example for illustration.
- the number of the three types of light-emitting chips can also be adjusted accordingly according to needs.
- the number of the first type of light-emitting chips 1013a can also be 5 or other values
- the number of the second type of light-emitting chips 1013b can also be 4 or other values.
- the number of the third type of light-emitting chips 1013c may also be 3 or other values, which is not limited in the embodiment of this application.
- the first light emitting area Q1 of the laser 101 can be the area where the first light emitting module is located
- the second light emitting area Q2 is the area where the second light emitting chip 1013b is located in the area where the second light emitting module is located
- the third light emitting area Q2 is the area where the second light emitting chip 1013b is located.
- the light emitting area Q3 is the area where the third type of light-emitting chip 1013c is located in the area where the second light-emitting module is located.
- the first sub-region in the first light-emitting area Q1 may be the area where part of the first type of light-emitting chips 1013a located at one end of the first light-emitting module is located.
- the second sub-region in the second light-emitting area Q2 may be the area where part of the second type of light-emitting chips 1013b located at one end of the second light-emitting module is located.
- the second sub-region may be half of the second light-emitting area Q2, or the second sub-region may be slightly larger or smaller than half of the second light-emitting area Q2.
- the size of the first sub-region may be set accordingly based on the size of the second sub-region.
- the second light-emitting area Q2 includes two second-type light-emitting chips 1013b, and the second sub-region may be the area where the second-type light-emitting chip 1013b that is far away from the third-type light-emitting chip 1013c is located.
- the first sub-region may be a region where a second type of light-emitting chip 1013b is located.
- the sizes of the first sub-region and the second sub-region can also be adjusted accordingly according to the number and arrangement of various types of light-emitting chips, which are not limited in the embodiments of this application.
- the laser 101 may also include only one tube wall 1012, such as the laser shown in FIG. 1 .
- Multiple light-emitting chips 1013 in the laser 101 can be arranged in multiple rows and columns in the tube wall 1012 .
- the arrangement of the plurality of light-emitting chips 1013 may be the same as the arrangement of the light-emitting chips 1013 in FIG. 9 and FIG. 10 , which will not be described again in the embodiment of the present application.
- each light emitting area is the area where various types of light-emitting chips are located.
- the plurality of first sub-lenses J1 in the second light combining mirror 103' can be combined with the plurality of rows of second-type light-emitting chips 1013b in the second light-emitting area Q2.
- each first sub-mirror J1 is located on the light exit side of a corresponding row of second-type light-emitting chips 1013b.
- the laser emitted by the row of second-type light-emitting chips 1013b is directed to the first sub-mirror J1.
- Each first sub-mirror J1 The lens J1 is used to reflect the laser light emitted by a corresponding row of second-type light-emitting chips 1013b along the second direction.
- the second light-emitting area Q2 only includes one row of second-type light-emitting chips 1013b, so each first sub-lens J1 corresponds to one second-type light-emitting chip 1013b.
- Each first sub-lens J1 in the second light combining mirror 103' reflects the laser light emitted by each second type light-emitting chip 1013b in the second direction.
- the plurality of second sub-mirrors J2 in the third light combining mirror 104' can correspond to the plurality of rows of third-type light-emitting chips 1013c.
- Each second sub-lens J2 is located on the light exit side of the corresponding row of third-type light-emitting chips 1013c. .
- the laser light emitted by the row of third-type light-emitting chips 1013c is directed to the second sub-mirror J2, and each second sub-mirror J2 is used to reflect the laser light emitted by the corresponding row of third-type light-emitting chips 1013c in the second direction.
- the third light-emitting area Q3 only includes one row of third-type light-emitting chips 1013c, so each second sub-lens J2 corresponds to one third-type light-emitting chip 1013c.
- Each second sub-lens J2 in the third light combining mirror 104' reflects the laser light emitted by each third type light-emitting chip 1013c along the second direction.
- the laser light emitted by the first sub-lens J1 may be directed to the second sub-lens J2.
- the second sub-lens J2 may be a dichroic mirror for transmitting the laser light emitted by the first sub-lens J1.
- the first sub-mirror J1 can be a reflector for the entire wavelength band, or it can also be a dichroic mirror, as long as it can reflect the laser light emitted by the first light-emitting area Q1.
- the divergence angle of the red laser emitted by the laser is larger than the divergence angle of the green laser and the blue laser. That is, the divergence angle of the laser light emitted from the first light emitting area Q1 of the laser 101 is greater than the divergence angle of the laser light emitted from the second light emitting area Q2 and the third light emitting area Q3. According to this divergence angle of transmission, the spot area of the red laser will be increasingly different from that of the green laser and blue laser.
- Figure 11 is a schematic diagram of a light spot formed by a laser emitted by a projection light source provided by the related art. As shown in Figure 11, the area of the red light spot in the related art is much larger than the areas of the green light spot and the red light spot. As a result, the mixing effect of lasers of different colors is poor, which is not conducive to the formation of subsequent projection images.
- the embodiments of the present application can also be improved on the basis of the above-mentioned projection light source to ensure that the difference in divergence angles of lasers of different colors emitted by the projection light source is small, further improve the light mixing effect of lasers of different colors, and improve the projection based on the laser.
- the display effect of the screen can also be improved on the basis of the above-mentioned projection light source to ensure that the difference in divergence angles of lasers of different colors emitted by the projection light source is small, further improve the light mixing effect of lasers of different colors, and improve the projection based on the laser.
- a component for adjusting the divergence angle of the laser can be provided between the laser 101 and the light combining mirror to which the laser light emitted is directed, so as to ensure that the divergence angles of the lasers of different colors directed towards the light combining mirror are more accurate. Close to each other to ensure that the light spots of each color laser after combining the light are highly consistent during the transmission process.
- FIG. 12A is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
- the projection light source 10 may also include a fly-eye lens 107 .
- the fly-eye lens 107 may be located between the laser 101 and the light combiner (ie, the first light combiner 103 and the second light combiner 104).
- the orthographic projection of the fly-eye lens 107 on the laser 101 covers the first light-emitting area Q1, the second light-emitting area Q2, and the third light-emitting area Q3.
- the laser light emitted by the laser 101 can be homogenized by the fly-eye lens 107 and then directed to the first light combiner. 103 and the second light combining lens 104.
- the laser light emitted from the first light-emitting area Q1 is homogenized by the fly-eye lens 107 and then directed to the first light combining mirror 103.
- the laser light emitted from the second light-emitting area Q2 and the third light-emitting area Q3 is homogenized by the fly-eye lens 107 and then directed to the second light combining lens 107.
- Combined light lens 104 is used to combine the laser light emitted from the first light-emitting area Q1 and then directed to the first light combining mirror 103.
- the fly-eye lens 107 is located between the laser 101 and the dimming lens group 102 as an example.
- the laser light emitted from the first sub-area in the first light-emitting area Q1 and the second sub-area in the second light-emitting area Q2 of the laser 101 can be homogenized by the fly-eye lens 107 and then directed to the first dimming mirror 1021 .
- the fly-eye lens 107 may also be located between the dimming lens group 102 and the combining lens.
- the embodiment of the present application does not illustrate the projection light source in this case.
- the laser light emitted by the second dimming mirror 1022 can be homogenized by the fly-eye lens 107 and then directed to the first light combining mirror 103 and the second light combining mirror 104 .
- the fly-eye lens 107 has a limiting effect on the etendue.
- the fly-eye lens 107 can cause laser light with an incident angle smaller than the aperture angle of the fly-eye lens 107 to be emitted at the aperture angle of the fly-eye lens 107 .
- the laser 101 emits After the lasers of various colors pass through the compound-eye lens 107, the divergence angles of the lasers of different colors can be adjusted to the aperture angle of the compound-eye lens 107, ensuring that the spot sizes formed by the lasers of various colors are consistent and the light mixing effect of the lasers of various colors is good. It can be better.
- the fly-eye lens 107 can also homogenize the incident laser, reduce the coherence between lasers, further improve the light mixing effect of various laser colors, and can weaken the speckle effect of the projection screen formed based on the laser, improving the projection.
- the display effect of the screen can also homogenize the incident laser, reduce the coherence between lasers, further improve the light mixing effect of various laser colors, and can weaken the speckle effect of the projection screen formed based on the laser, improving the projection.
- the display effect of the screen can also homogenize the incident laser, reduce the coherence between lasers, further improve the light mixing effect of various laser colors, and can weaken the speckle effect of the projection screen formed based on the laser, improving the projection.
- the fly-eye lens 107 may be formed by a plurality of microlens arrays.
- the diameter of each microlens can be on the order of millimeters, micrometers or even nanometers.
- the length of each microlens in the fly-eye lens 107 on the slow axis of the incident laser is greater than the length on the fast axis.
- the fast axis is parallel to the first direction, which is the direction perpendicular to the paper surface in Figure 12A; and the slow axis is parallel to the second direction, which is the y direction in Figure 12A.
- the aperture angle of the microlens is positively related to its diameter, and the aperture angle of the microlens in the slow axis direction can be larger than the aperture angle in the fast axis direction. Since the divergence angle of the laser light directed to the fly-eye lens 107 is relatively large on the slow axis, setting the fly-eye lens 107 in this way can ensure that the aperture angles in different directions of the fly-eye lens 107 match the divergence angle of the laser light in that direction, ensuring that each direction The aperture angles of the upper compound eye lens are all larger than the divergence angle of the incident laser light, and the compound eye lens 107 can adjust the divergence angles of the laser lights of various colors to be substantially consistent in each direction.
- the position of the fly-eye lens 107 can be fixed and remain stationary relative to the laser 101 .
- the fly-eye lens 107 can also move relative to the laser 101 .
- the fly-eye lens 107 can move back and forth within a certain range in the first direction, or it can also move back and forth within a certain range in the second direction. This range can be smaller, and it is necessary to ensure that the laser light emitted by the laser 101 can enter the compound eye lens 107 when the compound eye lens 107 is moved to any position.
- FIG. 12B is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
- the projection light source 10 may also include a fly-eye lens 107 .
- the fly-eye lens 107 may be located between the laser 101 and the light combiner lens (that is, the first light combiner mirror 102', the second light combiner mirror 103', and the third light combiner mirror 104').
- the orthographic projection of the fly-eye lens 107 on the laser 101 covers the first light-emitting area Q1, the second light-emitting area Q2, and the third light-emitting area Q3.
- the laser light emitted by the laser 101 can be homogenized by the fly-eye lens 107 and then directed to the first light combiner.
- the laser light emitted from the first light-emitting area Q1 is homogenized by the fly-eye lens 107 and then directed to the first light combining mirror 102'
- the laser light emitted from the second light-emitting area Q2 is homogenized by the fly-eye lens 107 and then directed to the second light combining mirror 103'
- the laser light emitted from the third light-emitting area Q3 is homogenized by the fly-eye lens 107 and then directed to the third light combining mirror 104'.
- composition, working principle and arrangement method of the compound eye lens 107 can be seen in the example of FIG. 12A and will not be described again.
- FIG. 13A is a schematic structural diagram of yet another projection light source provided by another embodiment of the present application.
- the projection light source 10 may further include a first diffusion sheet 108 and a second diffusion sheet 109 .
- the degree of diffusion of the incident laser light by the first diffusion sheet 108 may be smaller than the degree of diffusion of the incident laser light by the second diffusion sheet 109 .
- the orthographic projection of the first diffusion sheet 108 on the laser 101 covers the first light emitting area Q1, and the second diffusion sheet 109 is on the laser 101.
- the orthographic projection on 101 covers the second light emitting area Q2 and the third light emitting area Q3.
- the laser light emitted from the first light emitting area Q1 can be diffused and homogenized by the first diffusion sheet 108 and then directed to the first light combining mirror 103 .
- the laser light emitted from the second light emitting area Q2 and the third light emitting area Q3 can be diffused and homogenized by the second diffusion sheet 109 After being transformed, it is emitted to the second light combining mirror 104 .
- the diffuser can homogenize the incident laser and adjust the divergence angle of the laser.
- the degree of diffusion of the incident laser light by the first diffusion sheet 108 is smaller than the degree of diffusion of the incident laser light by the second diffusion sheet 109 .
- the divergence angle of the laser light emitted by the first diffusion sheet 108 can be close to that of the second diffusion sheet 109 .
- the divergence angle of the laser light emitted from the diffusion plate 109 This can ensure that the spot sizes of lasers of various colors are more consistent, the mixing effect of lasers of various colors is better, and the uniformity of lasers of various colors is higher, and the display effect of the projection screen formed based on the mixed lasers is better.
- the diffuser sheet may include a plurality of micro-strip prisms arranged in parallel, and the cross-section of the prisms may be triangular.
- the greater the vertex angle of the prism the greater the degree of diffusion of incident light by the diffuser sheet.
- the vertex angle refers to the angle away from the diffuser in the triangular cross section of the micro strip prism.
- the vertex angle of each micro strip prism in the first diffusion sheet 108 may be smaller than the vertex angle of each micro strip prism in the second diffusion sheet 109.
- the arrangement of the micro strip prisms in the first diffusion sheet 108 The density may be greater than the arrangement density of the micro strip prisms in the second diffusion sheet 109 .
- the two diffusers are located between the laser 101 and the dimming lens group 102 as an example.
- the laser light emitted from the first sub-region in the first light-emitting area Q1 and the second sub-area in the second light-emitting area Q2 of the laser 101 can be homogenized by the two diffusers respectively and then directed to the first dimming mirror 1021.
- the two diffusion sheets may also be located between the dimming lens group 102 and the light combining lens. The embodiment of this application does not illustrate the projection light source in this case.
- the laser light emitted by the second dimming mirror 1022 can be homogenized by the two diffusers and then directed to the first light combining mirror 103 and the second light combining mirror 104 .
- the first diffusion sheet 108 and the second diffusion sheet 109 are independently arranged as an example for illustration.
- the two diffusion sheets may also be two parts of a larger diffusion sheet.
- the positions of the first diffusion sheet 108 and the second diffusion sheet 109 can be fixed and remain stationary relative to the laser 101 .
- at least one of the first diffusion plate 108 and the second diffusion plate 109 can also move relative to the laser 101 .
- the diffuser can move back and forth within a certain range in the first direction, or can move back and forth within a certain range in the second direction, or it can rotate or vibrate, or it can flip back and forth within a certain angle range. If the diffuser rotates, the rotation axis may be located at the center of the diffuser, or may deviate from the center to a certain extent.
- the range of change in the position of the diffuser can be small, and it is necessary to ensure that the laser light emitted by the laser 101 can enter the diffuser when the diffuser is moved to any position.
- the first diffusion sheet 108 and the second diffusion sheet 109 are both flat-shaped as an example, that is, the light-incident surface and the light-emitting surface of the diffusion sheet can be parallel.
- the diffuser sheet may also be wedge-shaped, and the light incident surface and the light emergent surface of the diffuser sheet may not be parallel.
- the first diffusion sheet 108 and the second diffusion sheet 109 All are transmissive diffusers.
- the above-mentioned method of arranging a light uniforming component between the laser 101 and the light combining mirror can also be used in other projection light sources.
- this method can also be used in projection light sources in related technologies, and is not limited in the embodiments of this application.
- a diffusion sheet is provided in the light path after the laser beams of each color emitted by the laser 101 are mixed to homogenize the mixed laser beams of each color.
- the projection light source 10 may no longer provide diffusion in the light path after the lasers of each color are mixed. film to simplify the structure of the projection light source and facilitate the miniaturization of the projection light source.
- a diffuser may still be provided in the optical path after the lasers of each color are mixed to further homogenize the mixed lasers of each color.
- FIG. 13B is a schematic structural diagram of yet another projection light source provided by another embodiment of the present application.
- the projection light source 10 may also include a first diffusion sheet 108 and a second diffusion sheet 109 .
- the degree of diffusion of the incident laser light by the first diffusion sheet 108 may be smaller than the degree of diffusion of the incident laser light by the second diffusion sheet 109 .
- the orthographic projection of the first diffusion sheet 108 on the laser 101 covers the first light emitting area Q1
- the orthographic projection of the second diffusion sheet 109 on the laser 101 covers the second light emitting area Q2 and the third light emitting area Q3.
- the laser light emitted from the first light-emitting area Q1 can be diffused and homogenized by the first diffusion sheet 108 before being directed to the first light combining mirror 102'.
- the laser light emitted from the second light-emitting area Q2 can be diffused and homogenized by the second diffusion sheet 109 before being directed to the third light combining mirror 102'.
- the laser light emitted from the third light output area Q3 is diffused and homogenized by the second diffusion sheet 109 and then directed to the third light combiner mirror 104'.
- the arrangement and working process of the diffusion sheet can be seen in the example of FIG. 13A and will not be described again.
- the following is an introduction to the arrangement of the diffuser in the optical path of the projection light source 10 after the lasers of various colors are mixed with reference to the accompanying drawings.
- the following arrangement of the diffuser can be used for any of the above-mentioned projection light sources 10.
- the embodiment of the present application is based on the projection light source 10 shown in FIG. 3A to determine the arrangement of the diffuser in the optical path after the lasers of each color are mixed. The situation is introduced. It should be noted that the arrangement scheme in the following example is also applicable to the projection light source 10 shown in FIG. 3B and related embodiments.
- FIG. 14 is a schematic structural diagram of another projection light source provided by another embodiment of the present application.
- FIG. 15 is a schematic structural diagram of a projection light source provided by yet another embodiment of the present application.
- the projection light source 10 may further include at least one diffusion sheet located on the transmission path of the laser light emitted by the first light combiner 103 and the second light combiner 104 .
- the at least one diffusion sheet is located on the side of the first light combining lens 103 away from the second light combining lens 104 .
- FIG. 14 and FIG. 15 both illustrate that the at least one diffusion sheet includes two diffusion sheets, which are the third diffusion sheet 108 and the fourth diffusion sheet 111 respectively.
- the at least one diffusion sheet may also include only one diffusion sheet. This situation is not illustrated in the embodiments of this application.
- the diffusing degree of each diffusing piece of the at least one diffusing piece on the fast axis of the incident laser can be stronger than the diffusing degree on the slow axis. Because the divergence angle of the laser on the fast axis when it is directed toward the diffuser can be smaller than the divergence angle on the slow axis, for example, the divergence angle on the slow axis can be greater than 1 degree, and the divergence angle on the fast axis can be less than 1 degree.
- the diffusion degree of the diffuser on the fast axis is relatively strong, so that the divergence angles of the fast axis and the slow axis after the laser passes through the diffuser are closer, and the aspect ratio of the spot formed by the laser can be smaller. It can better meet the shape requirements of the laser emitted by the projection light source.
- each of the third diffusion sheet 108 and the fourth diffusion sheet 111 can meet at least one of the following conditions: the diffusion sheet is a reflective diffusion sheet or a transmissive diffusion sheet;
- the diffuser is wedge-shaped or flat-shaped; and the diffuser remains stationary, or the diffuser is used to translate within the target range, or the diffuser is used to rotate along the target direction, or the diffuser is used to flip within the target angle range.
- the range of its position movement can be smaller to avoid moving outside the irradiation range of the laser.
- Any one of the third diffusion sheet 108 and the fourth diffusion sheet 111 can be realized according to any combination of the three conditions.
- the diffuser can be a flat-shaped reflective diffuser, and the diffuser can be flipped back and forth within a range of 1 degree; or the diffuser can be a wedge-shaped transmissive diffuser, and the diffuser can be flipped back and forth within a certain range in the second direction. Move back and forth; or the diffuser can be a flat-shaped transmissive diffuser, which rotates clockwise with its center as the rotation axis.
- the diffusion sheet can also be implemented in a variety of optional ways, which will not be listed in the embodiments of this application.
- the third diffusion sheet 108 can be a reflective diffusion sheet
- the fourth diffusion sheet 111 can be a transmissive diffusion sheet, and both diffusion sheets are in the shape of a flat plate.
- the second light combining lens 104, the first light combining lens 103 and the third diffusion sheet 108 may be arranged in sequence along the x direction
- the third diffusion sheet 108 and the fourth diffusion sheet 111 may be arranged in sequence along the z direction.
- the laser light emitted by the first light combining mirror 103 along the x direction can be diffused by the third diffusion sheet 108 and reflected along the z direction to the fourth diffusion sheet 111 .
- the fourth diffusion sheet 111 further diffuses the incident laser light and then emits it in the z direction.
- the third diffusion sheet 108 can be flipped back and forth within a range of 1 degree or 2 degrees in the plane of the x direction and the z direction. During this process, the laser light emitted by the third diffusion plate 108 will be displaced in the x direction, and the laser light emitted by the third diffusion plate 108 can have a relatively random phase, which can reduce the speckle effect of the projection image formed by the laser light.
- the third diffusion sheet 108 and the fourth diffusion sheet 111 may both be transmissive diffusion sheets.
- the third diffusion sheet 108 is in the shape of a wedge
- the fourth diffusion sheet 111 is in the shape of a flat plate.
- the second light combining lens 104, the first light combining lens 103, the third diffusion sheet 108 and the fourth diffusion sheet 111 may be arranged in sequence along the x direction.
- the laser light emitted by the first light combiner 103 along the x direction can be diffused by the third diffusion sheet 108 and the fourth diffusion sheet 111 in sequence, and then emitted along the x direction.
- the third diffusion sheet 108 rotates with its center as a rotation axis.
- the third diffusion sheet 108 is wedge-shaped, and the laser light emitted from the diffusion sheet 108 can be deflected to the side where the wider part of the diffusion sheet 108 is located.
- the position of the laser emitted by the diffuser 108 can continue to move in the circumferential direction, and further the laser emitted by the third diffuser 108 can have The relatively random phase can reduce the speckle effect of the projection image formed by the laser.
- the projection light source 10 may further include a light uniformity component 112 .
- the light uniforming component can be used as a light emitting component of the projection light source 10 and is located at the end of the light path in the projection light source 10 .
- This uniform light component can collect and homogenize the laser light and then emit it to the subsequent modulation optical path to facilitate subsequent picture projection.
- the uniform light component 112 may be a fly-eye lens.
- the third diffusion sheet 108 and the fourth diffusion sheet 111 may both be located between the light combiner and the fly's eye lens.
- the distance between the diffusion sheet and the fly's eye lens may be larger, for example, the distance between the fourth diffusion sheet 111 and the fly's eye lens may be greater than 10 mm. This allows the laser to be transmitted from the diffuser to the fly-eye lens over a longer distance, thereby enlarging the light spot to a certain extent. Since the optical etendue of the compound-eye lens to the incident laser is the integral of the area and the incident angle, the compound-eye lens emits more laser light and has a better uniformity effect on the laser light.
- Figure 16 is a schematic structural diagram of another projection light source provided by yet another embodiment of the present application.
- the light uniformity component 112 in the projection light source 10 may also be a light pipe.
- a condensing lens 113 may also be provided in front of the light uniformity component 112 to focus the laser light to the light entrance of the light pipe.
- the third diffusion sheet 108, the converging lens 113, the fourth diffusion sheet 111 and the light pipe 112 may be arranged in sequence.
- the third diffusion sheet 108 and the fourth diffusion sheet 111 may also be located in the optical path before the condensing lens 113, which is not limited by the embodiment of the present application.
- the length direction of the light entrance of the light pipe can be parallel to the slow axis of the laser (that is, the slow axis of the incident laser), and the width direction can be parallel to the fast axis of the laser to ensure that the laser spot is formed at the light entrance of the light pipe. Matching the shape of the light entrance.
- the dimming lens group can combine the laser light emitted from the first sub-area at one end of the first light-emitting area with the laser light emitted from the second sub-area at the same end of the second light-emitting area. , adjusted to emit light to the first light combining mirror and the second light combining mirror respectively from the side of the third light emitting area away from the second light emitting area.
- the laser light from the second light exit area can be located on both sides of the laser light from the third light exit area when it is emitted to the second light combining mirror, which improves the distance between the laser light from the second light exit area and the laser light from the third light exit area.
- Symmetry of the laser in the light exit area Furthermore, the symmetry and light mixing uniformity of the lasers of various colors after being mixed by the first light combining mirror and the second light combining mirror are high, and the display effect of the projection screen formed based on the laser light can be better.
- Figure 17 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
- the projection device may include a projection light source 10 , a light valve 20 and a lens 30 .
- the projection light source may be any of the above-mentioned projection light sources, for example, it may be any of the projection light sources in FIGS. 3A to 16 .
- FIG. 17 takes the projection device including the projection light source shown in FIG. 14 as an example.
- the projection device may further include an illumination mirror group 40 and a total internal reflection prism 50 located between the projection light source 10 and the light valve 20 .
- the laser light emitted by the projection light source 10 can be directed to the illumination mirror group 40 to be converged by the illumination mirror group 40 and directed to the total internal reflection prism 50 .
- the total internal reflection prism 50 then emits the incident laser light to the light valve 20 .
- the light valve 20 is used to modulate the incident laser light and then direct it to the lens 30 , and the lens 30 is used to project the incident laser light to form a projection image.
- the light valve 20 may include multiple reflective sheets, and each reflective sheet may be used to form a pixel in the projection image.
- the light valve may cause the reflective sheet corresponding to the pixel to be displayed in a bright state to be displayed according to the image to be displayed.
- the laser light is reflected to the lens to modulate the light.
- the lens 30 may be a telephoto lens or an ultra-short focus lens.
- the lens may include multiple lenses, and each lens may be arranged sequentially along a certain direction.
- the laser light emitted from the light valve 20 can be directed to the screen through multiple lenses in the lens 30 in sequence, so that the lens can project the laser light and display the projection image.
- the lasers of various colors emitted by the projection light source have high symmetry and good consistency of the light spots. Therefore, based on the laser light emitted by the projection light source, a projection picture with better display effect can be formed.
- the terms “first”, “second” and “third” are only used for description purposes and cannot be understood as indicating or implying relative importance.
- the term “at least one” refers to one or more.
- the term “plurality” refers to two or more than two, unless expressly limited otherwise.
- the term "at least one of A and B” in this application is only an association relationship describing associated objects, indicating that there can be three relationships. For example, at least one of A and B can mean: A alone exists, and at the same time There are three situations: A and B, and B alone.
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Abstract
一种投影光源(10)及投影设备。投影光源(10)中激光器(101)的第二出光区(Q2)与第三出光区(Q3)位于第一出光区(Q1)在第一方向上的同一侧,且沿第二方向依次排布;第二出光区(Q2)中位于远离第三出光区(Q3)的一端的部分区域为第二子区,第一出光区(Q1)中位于该一端的部分区域为第一子区;调光镜组(102)用于将第一子区射出的激光和第二子区射出的激光,调整至从第三出光区(Q3)远离第二出光区(Q2)的一侧分别射向第一合光镜(103)和第二合光镜(104);第一合光镜(103)与第二合光镜(104)均用于将射入的激光沿第一方向出射。
Description
相关申请的交叉引用
本申请要求在2022年3月31日提交中国专利局、申请号为202210337489.6,发明名称为一种投影光源及投影设备,以及在2022年3月31日提交中国专利局、申请号为202210337502.8,发明名称为一种投影光源及投影设备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。
本申请涉及光电技术领域,特别涉及一种投影光源及投影设备。
随着光电技术的发展,投影设备被广泛应用。投影设备中的投影光源可以发出多种颜色的激光,基于该激光可以形成投影画面。投影光源发出的各种颜色的激光的对称性越高,混合效果越好,则投影画面的显示效果越好。
发明内容
本申请提供了一种投影光源,包括:激光器、调光镜组、第一合光镜和第二合光镜,第一合光镜和第二合光镜均位于调光镜组远离激光器的一侧;
激光器包括用于分别射出不同颜色的激光的第一出光区、第二出光区和第三出光区;第二出光区与第三出光区位于第一出光区在第一方向上的同一侧,且沿第二方向依次排布,第一方向垂直第二方向;第二出光区中位于远离第三出光区的一端的部分区域为第二子区,第一出光区中位于一端的部分区域为第一子区;
调光镜组用于将第一子区射出的激光和第二子区射出的激光,调整至从第三出光区远离第二出光区的一侧分别射向第一合光镜和第二合光镜;第一出光区中第一子区之外的区域射出的激光射向第一合光镜,第二出光区中第二子区之外的区域和第三出光区射出的激光射向第二合光镜;第一合光镜与第二合光镜均用于将射入的激光沿第一方向出射。
再一方面,提供了一种投影设备,投影设备包括:上述的投影光源,以及光阀和镜头;
投影光源用于向光阀射出激光,光阀用于将射入的激光调制后射向镜头,镜头用于将射入的激光进行投射以形成投影画面。
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。
图1是相关技术提供的一种投影光源的结构示意图;
图2是相关技术提供的一种合光镜组射出的激光形成的光斑的示意图;
图3A是本申请实施例提供的一种投影光源的结构示意图;
图3B是本申请实施例提供的一种投影光源的结构示意图;
图4A是本申请实施例提供的另一种投影光源的结构示意图;
图4B是本申请实施例提供的另一种投影光源的结构示意图;
图5A是本申请实施例提供的再一种投影光源的结构示意图;
图5B是本申请实施例提供的再一种投影光源的结构示意图;
图6A是本申请实施例提供的又一种投影光源的结构示意图;
图6B是本申请实施例提供的又一种投影光源的结构示意图;
图7A是本申请实施例提供的一种投影光源发出的激光形成的光斑的示意图;
图7B是本申请实施例提供的一种投影光源发出的激光形成的光斑的示意图;
图7C是本申请实施例提供的再一种投影光源发出的激光形成的光斑的示意图;
图8A是本申请另一实施例提供的一种投影光源的结构示意图;
图8B是本申请另一实施例提供的一种投影光源的结构示意图;
图8C是本申请另一实施例提供的一种投影光源的结构示意图;
图9是本申请实施例提供的一种激光器的结构示意图;
图10是本申请实施例提供的另一种激光器的结构示意图;
图11是相关技术提供的一种投影光源发出的激光形成的光斑的示意图;
图12A是本申请另一实施例提供的另一种投影光源的结构示意图;
图12B是本申请另一实施例提供的另一种投影光源的结构示意图;
图13A是本申请另一实施例提供的再一种投影光源的结构示意图;
图13B是本申请另一实施例提供的再一种投影光源的结构示意图;
图14是本申请另一实施例提供的又一种投影光源的结构示意图;
图15是本申请再一实施例提供的一种投影光源的结构示意图;
图16是本申请再一实施例提供的另一种投影光源的结构示意图;
图17是本申请实施例提供的一种投影设备的结构示意图。
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。
随着光电技术的发展,投影设备的应用越来越广泛,对投影设备投射的投影画面的显示效果的要求也越来越高。投影设备中的投影光源用于射出多种颜色的激光,该多种颜色的激光的对称性越高,重合度越高,混光均匀性越高,则基于该激光形成的投影画面的显示效果越好。
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00包括激光器01和合光镜组02。激光器00可以包括两列发光芯片,其中一列发光芯片用于发出红色激光,另一列发光芯片中的部分发光芯片用于发出绿色激光,剩余部分发光芯片用于发出蓝色激光。合光镜组02可以包括两个合光镜,每个合光镜位于一列发光芯片的出光侧,用于将该列发光芯片沿z方向发出的激光沿x方向出射,以实现对激光器01发出的各种颜色的激光的混合。
相关技术中,投影光源中激光在经过合光镜组射出后,还需要经过匀光部件将激光匀化后再进行后续画面投射。激光在匀光部件上的入射角度越接近则匀光部件对激光的匀化效果越接近。光斑的分布位置可以反映其在匀光部件上的入射角度,光斑越靠近两端则入射角度越大,越靠近中央则入射角度越小。激光在匀光部件上形成的光斑与图2所示的光斑类似,由于红色激光、绿色激光和蓝色激光在匀光部件上的入射角度差异较大,故匀光部件对不同颜色的激光的匀化效果差异较大,基于激光形成的投影画面的显示效果较差。
本申请实施例提供了一种投影光源及投影设备,该投影光源发出的各种颜色的激光的对称性较高,混光效果较好,可以形成显示效果较好的投影画面。
如图3A,图4A,图5A,图6A所示,该投影光源10可以包括:激光器101、调光镜组102、第一合光镜103和第二合光镜104。激光器101可以沿第三方向(如z方向)发出激光。调光镜组102、第一合光镜103和第二合光镜104均位于激光器101的出光侧,且第一合光镜103和第二合光镜104均位于调光镜组102远离激光器101的一侧。
激光器101可以包括第一出光区Q1、第二出光区Q2和第三出光区Q3,每个出光区用于射出一种颜色的激光,且不同出光区射出的激光的颜色不同。第二出光区Q2与第三出光区Q3位于第一出光区Q1在第一方向(如x方向)上的同一侧。第二出光区Q2与第三出光区Q3沿第二方向(如y方向)依次排布,第一方向垂直第二方向,且第一方向和第二方向均垂直第三方向。在一具体实施方式中,第一出光区Q1可以呈长方形。第一方向可以为该长方形的长度方向,第二方向可以为该长方形的宽度方向。
如图3A中第二出光区Q2与第三出光区Q3均位于第一出光区Q1的右侧,第二出光区Q2与第一出光区Q1,以及第三出光区Q3与第一出光区Q1均沿x方向依次排布。在一具体实施方式中,第二出光区Q2与第三出光区Q3也可以均位于第一出光区Q1的左侧,第二出光区Q2与第一出光区Q1,以及第三出光区Q3与第一出光区Q1也可以均沿x方向的反方向依次排布。在一具体实施方式中,图3A中第二出光区Q2与第三出光区Q3的位置也可以相互调换,相应地第二方向可以为y方向的反方向。
第一合光镜103可以与第一出光区Q1相对应,第二合光镜104可以与第二出光区Q2和第三出光区Q3相对应。第一合光镜103与第二合光镜104可以沿第一方向排布。第一出光区Q1射出的激光可以均传输至第一合光镜103,第二出光区Q2和第三出光区Q3射出的激光可以均传输至第二合光镜104。进而,第一合光镜103与第二合光镜104可以对射入的激光的传输方向再进行一定调整,以实现各个出光区射出的激光的混合。
第二出光区Q2中位于远离第三出光区Q3的一端的部分区域可以为第二子区(图中未标出),第一出光区中Q1中位于该一端的部分区域为第一子区(图中未标出)。第一子区和第二子区分别为第一出光区Q1和第二出光区Q2中位于同一端的部分区域。在一具体实施方式中,第一子区与第二子区可以在第一方向上对齐。如第一子区与第二子区中靠近出光区中其他区域的一端在第一方向上对齐。第一子区与第二子区的面积可以相等或者也可以不相等,本申请实施例不做限定。
调光镜组102在激光器101上的正投影可以覆盖第一出光区Q1中的第一子区和第二出光区Q2中的第二子区,该第一子区和第二子区射出的激光可以沿第三方向射向调光镜组102。调光镜组102可以将第一子区射出的激光,调整至从第三出光区Q3远离第二出光区Q2的一侧射向第一合光镜103;调光镜组102还可以将第二子区射出的激光,调整至从第三出光区Q3远离第二出光区Q2的一侧射向第二合光镜104。第一出光区Q1中第一子区之外的区域射出的激光可以直接射向第一合光镜103,第二出光区Q2中第二子区之外的区域和第三出光区Q3射出的激光可以直接射向第二合光镜104。
第一合光镜103与第二合光镜104沿第一方向或其反方向依次排布。在垂直第一方向的参考平面上,第一合光镜103的正投影与第二合光镜104的正投影至少部分重合。第一合光镜103与第二合光镜104均用于将射入的激光沿第一方向出射。需要说明的是,本申请中所述的参考平面仅为用于描述各个器件之间的位置及大小关系的假想平面,可以并非投影光源中实际存在的面。本申请实施例以第一方向为x方向;第二出光区Q2与第一出光区Q1,第三出光区Q3与第一出光区Q1,以及第二合光镜104与第一合光镜103均沿x方向依次排布;第一合光镜103与第二合光镜104均用于将激光沿x方向射出为例。在一
具体实施方式中,第一方向也可以为x方向的反方向;第二出光区Q2与第一出光区Q1,第三出光区Q3与第一出光区Q1,以及第二合光镜104与第一合光镜103可以仍沿x方向排布;第一合光镜103与第二合光镜104可以将激光沿x方向的反方向射出。
为了便于描述,下面将第一出光区Q1射出的激光称为第一激光,第二出光区Q2射出的激光称为第二激光,将第三出光区Q3射出的激光称为第三激光。示例地,第一合光镜103为二向色镜,第二合光镜104为全波段的反射镜。第二合光镜104可以将射入的第二激光和第三激光,沿第一方向反射向第一合光镜103。第一合光镜103可以将由第二合光镜104射出的第二激光和第三激光沿第一方向透射,且将第一激光沿第一方向反射。在一具体实施方式中,第二合光镜104也可以为二向色镜。该第二合光镜104仅需满足能反射第二激光和第三激光即可,对于其他颜色的激光可以透射也可以反射。
示例地,图7A是本申请实施例提供的一种投影光源发出的激光形成的光斑的示意图。该光斑可以为第一合光镜103与第二合光镜104将射入的激光均沿第一方向出射后,激光形成的光斑。图7A中的光斑G1为源自第一出光区Q1的激光形成的光斑,光斑G2为源自第二出光区Q2的激光形成的光斑,光斑G3为源自第三出光区Q3的激光形成的光斑。如图7A所示,本申请实施例中各种颜色的激光关于投影光源的主光轴的对称性较好,各种颜色的激光分布均匀性较高。
本申请实施例中,第二出光区Q2射出的激光被分为两部分,该两部分激光分别位于第三出光区Q3射出的激光的两侧。在第二合光镜104上,该两部分激光形成的光斑分别位于该第三出光区Q3射出的激光形成的光斑的两侧。如此可以保证第二激光与第三激光的对称情况更加相近,第二激光与第三激光的对称轴位置接近。如第二激光整体形成的光束的中心与第三激光整体形成的光束的中心可以接近甚至重合。进而第二激光与第三激光射入后续的匀光部件时的入射角度的差异可以较小,匀光部件对第二激光与第三激光的匀化效果一致性可以较好,第二激光与第三激光的混光效果可以较好。
并且,调光镜组102在调整第二激光时,还将第一激光中一端的部分激光调整至另一端。如此可以保证第一合光镜103中第一激光的照射位置,与第二合光镜104中第二激光和第三激光的照射位置偏差较小。进而第一合光镜103与第二合光镜104将射入的激光均沿第一方向出射后,各种颜色的激光关于投影光源的主光轴的对称性较好,不同颜色的激光的中心可以接近甚至重合,可以保证投影光源发出的各种颜色的激光的混光效果较好。
本申请以上实施例提供的投影光源中,调光镜组可以将第一出光区中一端的第一子区射出的激光与第二出光区中同一端的第二子区射出的激光,调整至从第三出光区远离第二出光区的一侧分别射向第一合光镜和第二合光镜。如此一来,源自第二出光区的激光在射
向第二合光镜时可以分别位于第三出光区射出的激光的两侧,提高了源自第二出光区的激光与源自第三出光区的激光的对称性。进而,经过第一合光镜和第二合光镜混光后各种颜色的激光的对称性及混光均匀性较高,基于该激光形成的投影画面的显示效果可以较好。
下面结合附图对本申请实施例中的调光镜组102进行介绍。
请继续参考图3A,图4A,图5A和图6A,调光镜组102可以包括沿第二方向依次排布的第一调光镜1021和第二调光镜1022。第一调光镜1021在激光器101上的正投影覆盖第一出光区Q1中的第一子区和第二出光区Q2中的第二子区。第二调光镜1022在激光器101上的正投影位于第三出光区Q3之外,且位于第三出光区Q3远离第二出光区Q2的一侧。第一子区与第二子区射出的激光可以均射向第一调光镜1021,第一调光镜1021用于将射入的激光反射向第二调光镜1022,第二调光镜1022用于将射入的源自第一子区的激光反射向第一合光镜103,将射入的源自第二子区的激光反射向第二合光镜104。
在调光镜组102的一种可选方式中,请继续参考图3A至图6A,第一调光镜1021与第二调光镜1022均为整块的镜片。第一调光镜1021与第二调光镜1022均可以呈长方形,该长方形的长度方向可以平行第一方向。第一调光镜1021与第二调光镜1022均可以倾斜设置,第一调光镜1021与第二调光镜1022平行。第二调光镜1022与激光器101位于第一调光镜1021的同一侧,以保证第一调光镜1021可以将激光器101射向的激光第一调光镜1021反射向第二调光镜1022。第一调光镜1021、第一合光镜103和第二合光镜104位于第二调光镜1022的同一侧,以保证第二调光镜1022可以将第一调光镜1021射出的激光反射向第一合光镜103和第二合光镜104。如第一调光镜1021和第二调光镜1022与第二方向的夹角均可以为45度,且与第三方向的夹角也可以均为45度。
本申请实施例中,第一调光镜1021与第二调光镜1022的尺寸可以接收的激光形成的光斑的尺寸来设计,每个调光镜需保证尺寸大于或等于接收的激光形成的光斑的尺寸。在一具体实施方式中,第一调光镜1021与第二调光镜1022的尺寸以及设置方式可以相同。在一具体实施方式中,第二子区射出的激光在第一调光镜1021上形成的光斑的整体长度范围可以为2.5毫米~3.5毫米,整体宽度范围可以为1.5毫米~2.5毫米,如该光斑的整体尺寸可以约为3毫米*2毫米。第一子区射出的激光在第一调光镜1021上形成的光斑与第二子区射出的激光在第一调光镜1021上形成的光斑大小相差较小。在一具体实施方式中,第一调光镜1021与第二调光镜1022的长度范围可以为9毫米~10毫米,宽度范围可以为1.5毫米~3毫米。如第一调光镜1021与第二调光镜1022的尺寸均可以为10毫米*2毫米。
在调光镜组102的另一种可选方式中,第一调光镜1021和第二调光镜1022均可以包括多个单独的镜片。图8A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
8A所示,第一调光镜1021包括第一子镜片J1和第二子镜片J2,第二调光镜1022包括第三子镜片J3和第四子镜片J4。第一子镜片J1在激光器101上的正投影覆盖第一子区,第二子镜片J2在激光器101上的正投影覆盖第二子区。第一子镜片J1与第三子镜片J3可以沿第二方向依次排布,第二子镜片J2与第四子镜片J4也可以沿第二方向依次排布。
第一子镜片J1、第二子镜片J2、第三子镜片J3和第四子镜片J4均可以倾斜设置。该四个子镜片可以均平行。激光器101与第三镜片J3位于第一子镜片J1的同一侧,第一子镜片J1与第一合光镜103位于第三子镜片J3的同一侧。如此,第一子区射出的激光可以射向第一子镜片J1,第一子镜片J1用于将射入的激光反射向第三子镜片J3,第三子镜片J3用于将射入的激光反射向第一合光镜103。激光器101与第四子镜片J4位于第二子镜片J2的同一侧,第二子镜片J2与第二合光镜104位于第四子镜片J4的同一侧。如此,第二子区射出的激光可以射向第二子镜片J2,第二子镜片J2用于将射入的激光射向第四子镜片J4,第四子镜片J4用于将射入的激光反射向第二合光镜104。如该四个子镜片与第二方向的夹角可以均为45度,且与第三方向的夹角也可以均为45度。
本申请实施例中,各个子镜片的尺寸可以依据接收的激光形成的光斑尺寸来决定。在一具体实施方式中,第一子镜片J1、第二子镜片J2、第三子镜片J3和第四子镜片J4的尺寸以及设置方式可以均相同。如该四个子镜片均呈长方形,该长方形的长度方向可以平行第一方向。在一具体实施方式中,每个子镜片的长度范围可以为2.5毫米~4毫米,宽度范围可以为1.5毫米~3毫米,如每个子镜片的尺寸可以约为3毫米*2毫米。在一具体实施方式中,第一子区射出的激光形成的光斑尺寸与第二子区射出的激光形成的光斑尺寸可以不同,进而第一子镜片J1与第二子镜片J2的尺寸可以不同。由于第三子镜片J3接收的激光为第一子镜片J1射出的激光,第四子镜片J4接收的激光为第二子镜片J2射出的激光,故第一子镜片J1与第三子镜片J3的尺寸可以相同,第二子镜片J2与第四子镜片J4的尺寸可以相同。
在一具体实施方式中,本申请实施例中调光镜可以为反射镜。调光镜可以由金属材质制成,或者可以在透明镜片上镀反光膜得到。在一具体实施方式中,调光镜也可以为二向色镜。仅需保证调光镜能将射入的激光沿所需方向出射即可,对于其他颜色的激光是否能够透射不做考虑。
以及,图3B是本申请实施例提供的一种投影光源的结构示意图,图4B是本申请实施例提供的另一种投影光源的结构示意图,图5B是本申请实施例提供的再一种投影光源的结构示意图。图4B可以为图3B所示的投影光源的右视图,图5B可以为图3B所示的投影光源的俯视图。如图3B至图5B所示,该投影光源10可以包括激光器101,以及位于
激光器101的出光侧的第一合光镜102’、第二合光镜103’、第三合光镜104’、第四合光镜105和第五合光镜106。
激光器101可以沿第三方向(如z方向)发出激光。激光器101可以包括第一出光区Q1、第二出光区Q2和第二出光区Q2,每个出光区用于射出一种颜色的激光,且不同出光区射出的激光的颜色不同。第二出光区Q2与第二出光区Q2位于第一出光区Q1在第一方向(如x方向)上的同一侧。第二出光区Q2与第二出光区Q2沿第二方向(如y方向)依次排布,第一方向垂直第二方向,且第一方向和第二方向均垂直第三方向。在一具体实施方式中,第一出光区Q1可以呈长方形。第一方向可以为该长方形的长度方向,第二方向可以为该长方形的宽度方向。
如图3B和图5B中第二出光区Q2与第二出光区Q2均位于第一出光区Q1的右侧,第二出光区Q2与第一出光区Q1,以及第二出光区Q2与第一出光区Q1均沿x方向依次排布。在一具体实施方式中,第二出光区Q2与第二出光区Q2也可以均位于第一出光区Q1的左侧,第二出光区Q2与第一出光区Q1,以及第二出光区Q2与第一出光区Q1也可以均沿x方向的反方向依次排布。在一具体实施方式中,图3B和图5B中第二出光区Q2与第二出光区Q2的位置也可以相互调换,相应地第二方向可以为y方向的反方向。
第一合光镜102’、第二合光镜103’、第三合光镜104’可以依次分别与第一出光区Q1、第二出光区Q2和第二出光区Q2一一对应。该三个合光镜中每个合光镜在激光器101上的正投影可以覆盖对应的出光区,该三个合光镜的位置关系可以参考上述对于该三个出光区的位置关系的介绍,本申请实施例不再赘述。也即第一合光镜102’在激光器101上的正投影可以覆盖第一出光区Q1,第二合光镜103’在激光器101上的正投影可以覆盖第二出光区Q2,第三合光镜103’在激光器101上的正投影可以覆盖第二出光区Q2。每个出光区用于向对应的合光镜射出激光。也即第一出光区Q1用于向第一合光镜102’射出激光,第二出光区Q2用于向第二合光镜103’射出激光,第二出光区Q2用于向第三合光镜104’射出激光。
本申请实施例中,第一合光镜102’与第四合光镜105沿第二方向依次排布,第二合光镜103’、第三合光镜104’和第五合光镜106也沿第二方向依次排布。在垂直第二方向的参考平面上,第一合光镜102’与第四合光镜105的正投影至少部分重合,第二合光镜103’、第三合光镜104’和第五合光镜106的正投影至少部分重合。需要说明的是,本申请中所述的参考平面仅为用于描述各个器件之间的位置及大小关系的假想平面,可以并非投影光源中实际存在的面。
各个合光镜均可以倾斜设置。激光器101与第四合光镜105可以位于第一合光镜102’
的同一侧,第一合光镜102’用于将激光器101中第一出光区射出的激光沿第二方向反射向第四合光镜105。激光器101与第三合光镜104’位于第二合光镜103’的同一侧,第二合光镜103’用于将激光器101中第二出光区发出的激光沿第二方向反射向第三合光镜104’。激光器101与第五光镜106位于第三合光镜104’的同一侧。第三合光镜104’可以为二向色镜。第三合光镜104’用于将激光器101中第三出光区射出的激光沿第二方向反射向第五合光镜106,第三合光镜104’还可以将第二合光镜103’射出的激光沿第二方向透射向第五合光镜106。如此在第三合光镜104’之后就可以实现第二出光区射出的激光与第三出光区射出的激光的混合。
本申请实施例以x方向为第一方向为例,第五合光镜106与第四合光镜105可以沿x方向依次排布。在垂直第一方向的参考平面上,第五合光镜106与第四合光镜105的正投影至少部分重合。第五合光镜106与第四合光镜105均可以倾斜设置,第四合光镜105与第三合光镜104’可以位于第五合光镜106的同一侧。第五合光镜106可以将第三合光镜104’射出的激光沿x方向反射向第四合光镜105。第四合光镜105为二向色镜。第四合光镜105可以将第五合光镜106射出的激光沿x方向透射,第四合光镜105还可以将第一合光镜102’射出的激光沿x方向反射。
在一具体实施方式中,第一方向可以为x方向的反方向,第五合光镜106与第四合光镜105可以仍沿x方向依次排布。此时可以调整第五合光镜106与第四合光镜105的倾斜方向,如将第五合光镜106与第四合光镜105均在x方向和y方向所在面内翻转90度,且可以使第五合光镜106为二向色镜。图6B是本申请实施例提供的又一种投影光源的结构示意图。如图6B所示,第四合光镜105可以向第五合光镜106反射出激光,且该激光可以透过第五合光镜106沿x方向的反方向射出。且第五合光镜106可以将第三合光镜104’射出的激光沿x方向的反方向反射。
示例地,图7B是本申请实施例提供的一种投影光源发出的激光形成的光斑的示意图。该光斑可以为第五合光镜106与第四合光镜105将射入的激光均沿第一方向出射后,激光形成的光斑。图7B中的光斑G1为源自第一出光区的激光形成的光斑,光斑G2为源自第二出光区的激光形成的光斑,光斑G3为源自第三出光区的激光形成的光斑。如图7B所示,本申请实施例中各种颜色的激光关于投影光源的主光轴的对称性较好,各种颜色的激光分布均匀性较高。
本申请实施例中,对于沿第二方向排布的第二出光区Q2和第三出光区Q3,先通过第二合光镜103’和第三合光镜104’,将第二出光区Q2发出的激光(简称为第二激光)和第三出光区Q3发出的激光(简称为第三激光)在第二方向上进行合光,如此可以将第二
激光和第三激光调整至中心重合度较高。之后,通过第一合光镜102’、第四合光镜105和第五合光镜106,将混合后的第二激光和第三激光再与第一出光区Q1发出的激光混合后沿第一方向出射,可以保证该三种激光关于投影光源的主光轴的对称性较好,各种颜色的激光分布均匀性较高,提高了混光效果。
本申请实施例中,第一合光镜102’和第二合光镜103’可以为全波段的反射镜,或者也可以为二向色镜。在一具体实施方式中,本申请实施例中第一合光镜102’、第二合光镜103’和第三合光镜104’在第三方向上距激光器101的距离可以均相等。该距离可以指合光镜的中心位置距激光器101的距离。
综上,本申请实施例提供的投影光源中,可以通过第二合光镜和第三合光镜,将沿第二方向排布的第二出光区和第三出光区发出的激光先在第二方向上合光,提高了源自第二出光区的激光与源自第三出光区的激光的对称性。之后再通过第一合光镜、第四合光镜和第五合光镜,将激光器发出的各种颜色的激光均混合并沿第一方向出射,保证了投影光源发出的各种颜色的激光的对称性及混光均匀性较高,基于该激光形成的投影画面的显示效果可以较好。
在投影光源10的一种可选方式中,请继续参考图3B,图4B,图5B和图6B,第一合光镜102’、第二合光镜103’、第三合光镜104’、第四合光镜102’和第五合光镜106均为整块的镜片。第一合光镜102’、第二合光镜103’和第三合光镜104’可以均平行。该三个合光镜与第二方向的夹角可以均为45度,该三个合光镜与第三方向的夹角也均为45度。
由于激光器101中第二出光区Q2与第三出光区Q3中相邻芯片的间距均相等,经过第二合光镜103’与第三合光镜104’反射后,第二激光形成的各个小光斑之间的距离与第三激光形成的各个小光斑之间的距离也相等。如图7B所示,第二出光区Q2可以包括两个发光芯片,第二出光区Q2射出的第二激光可以形成两个小光斑。第三出光区Q3可以包括三个发光芯片,第三出光区Q3射出的第三激光可以形成三个小光斑。该两个小光斑与该三个小光斑可以交错排布。
在投影光源10的另一种可选方式中,图8B是本申请另一实施例提供的一种投影光源的结构示意图,图8C是本申请另一实施例提供的再一种投影光源的结构示意图。图8C可以为图8B所示的投影光源的右视图。如图8B所示,第二合光镜103’可以包括沿第二方向依次排布的多个第一子镜片J1,且不同第一子镜片J1距激光器101的距离均不同。第三合光镜104’包括沿第二方向依次排布的多个第二子镜片J2,且不同第二子镜片J2距激光器101的距离均不同。本申请实施例以第二合光镜103’包括两个第一子镜片J1,第三
合光镜103’包括三个第二子镜片J2为例。通过将第二合光镜103’和第三合光镜103’分为多个子镜片,可以保证对第二出光区Q2射出的激光的位置以及第三出光区Q3射出的激光的位置进行更为灵活地调整。
示例地,最靠近激光器101的第一子镜片J1和第二子镜片J2在第五合光镜106上的正投影至少部分重合,最远离激光器101的第一子镜片J1和第二子镜片J2在第五合光镜106上的正投影至少部分重合。如此最靠近激光器101的第一子镜片J1和第二子镜片J2射出的激光重合,最远离激光器101的第一子镜片J1和第二子镜片J2射出的激光也重合,进而可以保证源自第二出光区Q2的激光和源自第三出光区Q3的激光形成光斑的整体范围差异较小,提高该两种激光的对称性。
在一具体实施方式中,该可以对各个子镜片的高度进行进一步地设计,以使源自第二出光区Q2的激光和源自第三出光区Q3的激光形成光斑的边缘,更贴近源自第一出光区Q1的激光形成的光斑的边缘。如可以使最靠近激光器101的第一子镜片J1和第二子镜片J2距激光器101的距离,均等于第一合光镜102’上距激光器101最近的小光斑距激光器101的距离。还可以使最远离激光器101的第一子镜片J1和第二子镜片J2距激光器101的距离,均等于第一合光镜102’上距激光器101最远的小光斑距激光器101的距离。
示例地,图7C是本申请实施例提供的再一种投影光源发出的激光形成的光斑的示意图。如图7C所示,源自第二出光区Q2的激光形成的光斑G2和源自第三出光区Q3的激光形成的光斑G3,均较为贴近源自第一出光区Q1的激光形成的光斑G1尺寸。各种颜色的激光关于投影光源的主光轴的对称性较好,各种颜色的激光分布均匀性较高。光斑G1、光斑G2和光斑G3的边缘贴合度较高。如此分布的激光在经过匀光部件时,在匀光部件中的匀化效果的一致性较高,且匀化效果均较好,可以进一步保证基于该激光形成的投影画面的显示效果。
本申请实施例中,各个子镜片的尺寸可以依据接收的激光形成的光斑尺寸来决定。在一具体实施方式中,第一子镜片J1和第二子镜片J2的尺寸以及设置方式可以均相同。如该子镜片均呈长方形,该长方形的长度方向可以平行第一方向。在一具体实施方式中,每个子镜片的长度范围可以为2.5毫米~4毫米,宽度范围可以为1.5毫米~3毫米,如每个子镜片的尺寸可以约为3毫米*2毫米。
本申请实施例以第二合光镜103’和第三合光镜104’均分成多个子镜片为例。在一具体实施方式中,第二合光镜103’和第三合光镜104’中也可以仅一个合光镜分为多个子镜片。在一具体实施方式中,第一合光镜101也可以分为多个子镜片,第一合光镜101的子镜片的划分方式可以与第二合光镜103’和第三合光镜104’相同,本申请实施例不
再赘述。
下面结合附图对本申请实施例中的激光器101进行介绍。
本申请实施例中的激光器101可以为多色激光器。多色激光器也即是能发出多种颜色的激光的激光器。图9是本申请实施例提供的一种激光器的结构示意图。图10为本申请实施例提供的另一种激光器的结构示意图。图9可以为图10所示的激光器的俯视图,图10可以为图9所示的激光器中截面a-a’的示意图。请结合图3A至图10,激光器101可以包括底板1011和两个发光模组(图中未标出)。本申请实施例中所述的某器件(如调光镜或合光镜)在激光器101上的正投影,均可以指该器件在激光器101的底板1011上的正投影。
该两个发光模组均位于底板1011上,且该两个发光模组可以沿第一方向依次排布。每个发光模组可以包括环状的管壁1012和被管壁1012包围的多个发光芯片1013。在一具体实施方式中,每个发光模组可以呈长条状,每个发光模组在底板1011上的正投影可以大致呈长方形。该长方形的长度方向可以平行于第二方向,宽度方向可以平行于第一方向。
如图9所示,每个发光模组中的多个发光芯片1013可以沿第一方向排成至少一排。本申请实施例以该多个发光芯片仅排成一排为例;在一具体实施方式中,该多个发光芯片也可以排成多排,如两排或三排,本申请实施例不做限定。在一具体实施方式中,每个发光模组中的多个发光芯片1013发出的激光的慢轴可以均平行第一方向。
需要说明的是,激光在不同的光矢量方向上的传输速度会存在差异,传输速度快的光矢量方向为快轴,传播速度慢的光矢量方向为慢轴,快轴垂直于慢轴。快轴可以垂直于发光芯片1013的表面,慢轴平行于发光芯片1013的表面,如快轴为z方向,慢轴为y方向。激光在快轴上的发散角度大于在慢轴上的发散角度,如在快轴上的发散角基本是在慢轴上的发散角度的3倍以上。发光芯片1013以发出的激光的慢轴作为排布方向进行排布。由于该方向上激光的发散角度较小,故在避免相邻发光芯片1013发出的激光干扰重叠的基础上,发光芯片1013之间的距离可以较小,发光芯片1013的设置密度可以较大,有利于激光器的小型化。在一具体实施方式中,发光模组中的多个发光芯片1013也可以阵列排布,排成多行多列,本申请实施例不做限定。
每个发光模组还可以包括准直镜组1014、多个热沉1015、多个反射棱镜1016和透光密封层1018。该多个热沉1015和该多个反射棱镜1016可以均与发光模组中的多个发光芯片1013一一对应。每个发光芯片1013位于对应的热沉1015上,热沉1015用于辅助对应的发光芯片1013散热。热沉1015的材料可以包括陶瓷。每个反射棱镜1016位于对应的发光芯片1013的出光侧。透光密封层1018位于管壁1012远离底板1011的一侧,用于密
封管壁1012远离底板1011的一侧的开口,以与底板1011和管壁1012共同围成密封空间。在一具体实施方式中,激光器101也可以不包括透光密封层1018,而由准直镜组1014直接与管壁1012远离底板1011的表面固定。如此,准直镜组1014与管壁1012和底板1011共同围成密封空间。
准直镜组1014位于透光密封层1018远离底板1011的一侧。准直镜组1014包括与该多个发光芯片1013一一对应的多个准直透镜(图中未标出)。本申请实施例中每个准直镜组1014中的各个准直透镜可以一体成型。示例地,准直镜组1014大致呈板状,该准直镜组1014靠近底板1011的一面为平面,远离底板1011的一面具有多个凸弧面,该多个凸弧面中每个凸弧面所在的部分均为一个准直透镜。
发光芯片1013可以向对应的反射棱镜1016发出激光,反射棱镜1016可以沿远离底板1011的方向(如z方向),将该激光反射向准直镜组1014中该发光芯片1013对应的准直透镜,进而该激光可以被该准直透镜准直后出射。需要说明的是,发光芯片1013发出的激光在经过准直透镜的调整后,激光的快轴上的发散角度可以小于慢轴上的发散角度。
本申请实施例中,激光器101中不同的发光模组中的发光芯片1013可以用于发出不同颜色的激光。需要说明的是,发光芯片可以按照发光颜色进行划分,每类发光芯片可以发出一种颜色的激光,且不同类发光芯片用于发出不同颜色的激光。本申请实施例中,激光器101中的不同发光模组可以包括不同类发光芯片。每个发光模组可以仅包括一类发光芯片,或者也可以存在发光模组包括多类发光芯片。
示例地,如图9和图10所示,激光器101可以包括第一发光模组和第二发光模组,该第一发光模组可以为图9中位于左侧的发光模组,第二发光模组可以为图9中位于右侧的发光模组。该第一发光模组可以包括多个第一类发光芯片1013a,第二发光模组可以包括多个第二类发光芯片1013b和多个第三类发光芯片1013c。第一类发光芯片1013a、第二类发光芯片1013b和第三类发光芯片1013c发出的激光的波长依次递减。例如,第一类发光芯片1013a用于发出红色激光,第二类发光芯片1013b用于发出蓝色激光,第三类发光芯片1013c用于发出绿色激光。也即上述第一激光为红色激光,第二激光为蓝色激光,第三激光为绿色激光。该三类发光芯片发出的激光也可以为其他颜色,如第三类发光芯片1013b用于发出黄色激光,本申请实施例不做限定。
需要说明的是,本申请实施例以第一发光模组中第一类发光芯片1013a的数量为4,第二发光模组中第二类发光芯片1013b的数量为3,第三类发光芯片1013c的数量为2为例进行示意。该三类发光芯片的数量也可以根据需求进行相应地调整,如第一类发光芯片1013a的数量也可以为5或其他值,第二类发光芯片1013b的数量也可以为4或其他值,
第三类发光芯片1013c的数量也可以为3或其他值,本申请实施例不做限定。
本申请实施例中,激光器101的第一出光区Q1可以为该第一发光模组所在区域,第二出光区Q2为第二发光模组所在区域中第二类发光芯片1013b所在区域,第三出光区Q3为第二发光模组所在区域中第三类发光芯片1013c所在区域。第一出光区Q1中的第一子区可以为第一发光模组中位于一端的部分第一类发光芯片1013a所在区域。第二出光区Q2中的第二子区可以为第二发光模组中位于一端的部分第二类发光芯片1013b所在区域。
在一具体实施方式中,第二子区可以为第二出光区Q2的一半区域,或者第二子区也可以稍大于或小于第二出光区Q2的一半区域。第一子区的大小可以基于该第二子区的大小进行相应地设置。如此,可以将第二出光区Q2发出的第二激光平均分成两部分,使该两部分激光在射向第二合光镜104时分别位于第三激光的两侧,进而可以保证第二激光的对称性最高。示例地,本申请实施例中第二出光区Q2中包括两个第二类发光芯片1013b,第二子区可以为其中远离第三类发光芯片1013c的第二类发光芯片1013b所在区域。相应地,第一子区可以为一个第二类发光芯片1013b所在的区域。第一子区与第二子区的大小也可以根据各类发光芯片的数量及排布进行相应地调整,本申请实施例不做限定。
在一具体实施方式中,激光器101也可以仅包括一个管壁1012,如图1中所示的激光器。激光器101中的多个发光芯片1013可以在该一个管壁1012中排布成多行多列。该多个发光芯片1013的排布方式可以与图9和图10中发光芯片1013的排布方式相同,本申请实施例不再赘述。此种激光器101中,各个出光区即为各类发光芯片所在的区域。
在投影光源10的另一种可选方式中,参见图8B,第二合光镜103’中的多个第一子镜片J1可以与第二出光区Q2中的多列第二类发光芯片1013b一一对应,每个第一子镜片J1位于对应的一列第二类发光芯片1013b的出光侧,该列第二类发光芯片1013b发出的激光射向该第一子镜片J1,每个第一子镜片J1用于将对应的一列第二类发光芯片1013b发出的激光沿第二方向反射。本申请实施例中第二出光区Q2仅包括一行第二类发光芯片1013b,则每个第一子镜片J1对应一个第二类发光芯片1013b。第二合光镜103’中的各个第一子镜片J1分别将各个第二类发光芯片1013b发出的激光沿第二方向反射。
第三合光镜104’中的多个第二子镜片J2可以与多列第三类发光芯片1013c一一对应,每个第二子镜片J2位于对应的一列第三类发光芯片1013c的出光侧。该列第三类发光芯片1013c发出的激光射向该第二子镜片J2,每个第二子镜片J2用于将对应的一列第三类发光芯片1013c发出的激光沿第二方向反射。本申请实施例中第三出光区Q3仅包括一行第三类发光芯片1013c,则每个第二子镜片J2对应一个第三类发光芯片1013c。第三合光镜104’中的各个第二子镜片J2分别将各个第三类发光芯片1013c发出的激光沿第二方向反射。
第一子镜片J1射出的激光可能会射向第二子镜片J2,该第二子镜片J2可以为二向色镜,用于透射第一子镜片J1射出的激光。第一子镜片J1可以为针对全波段的反射镜,或者也可以为二向色镜,仅需保证其可以反射第一出光区Q1发出的激光即可。
需要说明的是,激光器发出的红色激光的发散角度大于绿色激光与蓝色激光的发散角度。也即激光器101的第一出光区Q1射出的激光的发散角度,大于第二出光区Q2和第三出光区Q3射出的激光的发散角度。按照该发散角度传输,则红色激光的光斑面积与绿色激光和蓝色激光的光斑面积差异将越来越大。如图11是相关技术提供的一种投影光源发出的激光形成的光斑的示意图。如图11所示,相关技术中红色光斑的面积远大于绿色光斑和红色光斑的面积。如此一来,不同颜色的激光的混合效果较差,不利于后续投影画面的形成。
本申请实施例还可以在上述投影光源的基础上进行改进,保证投影光源发出的不同颜色的激光的发散角度差异较小,进一步提升不同颜色的激光的混光效果,提高基于该激光形成的投影画面的显示效果。
本申请实施例中,可以在激光器101与其射出的激光射向的合光镜之间,设置对激光的发散角度进行调整的部件,以保证射向合光镜的不同颜色的激光的发散角度更接近,保证合光后的各色激光在传输过程中的光斑一致性较高。
在一种可选实现方式中,图12A是本申请另一实施例提供的另一种投影光源的结构示意图。如图12A所示,投影光源10还可以包括:复眼透镜107。复眼透镜107可以位于激光器101与合光镜(也即第一合光镜103和第二合光镜104)之间。复眼透镜107在激光器101上的正投影覆盖第一出光区Q1、第二出光区Q2和第三出光区Q3,激光器101射出的激光均可以经复眼透镜107匀化后射向第一合光镜103和第二合光镜104。如第一出光区Q1射出的激光经复眼透镜107匀化后射向第一合光镜103,第二出光区Q2和第三出光区Q3射出的激光经复眼透镜107匀化后射向第二合光镜104。
需要说明的是,图12A以复眼透镜107位于激光器101与调光镜组102之间为例。激光器101中第一出光区Q1中的第一子区和第二出光区Q2中的第二子区射出的激光,可以经过复眼透镜107匀化后射向第一调光镜1021。在一具体实施方式中,复眼透镜107也可以位于调光镜组102与合光镜之间,本申请实施例未对此种情况的投影光源进行示意。此时,第二调光镜1022射出的激光可以经复眼透镜107匀化后再射向第一合光镜103和第二合光镜104。
复眼透镜107对光学扩展量具有限制作用。复眼透镜107可以使入射角度小于复眼透镜107的孔径角的激光,以复眼透镜107的孔径角出射。本申请实施例中,激光器101发
出的各种颜色的激光通过复眼透镜107后,不同颜色的激光的发散角度可以均被调整为复眼透镜107的孔径角,保证各色激光形成的光斑尺寸一致性较好,各色激光的混光效果可以较好。且复眼透镜107还可以对射入的激光进行匀化,降低激光之间的相干性,可以进一步提高各色激光的混光效果,且可以减弱基于该激光形成的投影画面的散斑效应,提高投影画面的显示效果。
复眼透镜107可以由多个微透镜阵列排布形成。每个微透镜的直径可以在毫米、微米甚至纳米量级。示例地,复眼透镜107中的各个微透镜在射入的激光的慢轴上的长度大于在快轴上的长度。如该快轴平行第一方向,也即图12A中垂直纸面的方向;慢轴平行第二方向,也即图12A中的y方向。微透镜的孔径角与其直径正相关,微透镜在该慢轴方向上的孔径角可以大于在快轴方向上的孔径角。由于射向复眼透镜107的激光在慢轴上的发散角度较大,如此设置复眼透镜107可以保证复眼透镜107中不同方向上的孔径角与该方向上激光的发散角度相匹配,保证每个方向上复眼透镜的孔径角均大于射入的激光的发散角度,进而复眼透镜107可以将在每个方向上均将各色激光的发散角度调整至基本一致。
在一具体实施方式中,复眼透镜107的位置可以固定不变,相对激光器101保持静止。或者,在激光器101发光时,复眼透镜107也可以相对激光器101运动。如复眼透镜107可以在第一方向上一定范围内来回移动,或者也可以在第二方向上一定范围内来回移动。该范围可以较小,需保证复眼透镜107移动至任意位置激光器101射出的激光均可以射入该复眼透镜107。
在一种可选实现方式中,图12B是本申请另一实施例提供的另一种投影光源的结构示意图。如图12B所示,投影光源10还可以包括:复眼透镜107。复眼透镜107可以位于激光器101与合光镜(也即第一合光镜102’、第二合光镜103’和第三合光镜104’)之间。复眼透镜107在激光器101上的正投影覆盖第一出光区Q1、第二出光区Q2和第三出光区Q3,激光器101射出的激光均可以经复眼透镜107匀化后射向第一合光镜102’、第二合光镜103’和第三合光镜104’。如第一出光区Q1射出的激光经复眼透镜107匀化后射向第一合光镜102’,第二出光区Q2射出的激光经复眼透镜107匀化后射向第二合光镜103’,第三出光区Q3射出的激光经复眼透镜107匀化后射向第三合光镜104’。
类似的,复眼透镜107的组成、工作原理以及设置方式可参见图12A示例,不再赘述。
在又一种可选实现方式中,图13A是本申请另一实施例提供的再一种投影光源的结构示意图。如图13A所示,投影光源10还可以包括第一扩散片108和第二扩散片109。该第一扩散片108对射入的激光的扩散程度可以小于第二扩散片109对射入的激光的扩散程度。第一扩散片108在激光器101上的正投影覆盖第一出光区Q1,第二扩散片109在激光器
101上的正投影覆盖第二出光区Q2与第三出光区Q3。第一出光区Q1射出的激光可以经第一扩散片108扩散匀化后射向第一合光镜103,第二出光区Q2和第三出光区Q3射出的激光经第二扩散片109扩散匀化后射向第二合光镜104。
扩散片可以对射入的激光进行匀化,且对该激光的发散角度进行调整。本申请实施例中,第一扩散片108对射入的激光的扩散程度小于第二扩散片109对射入的激光的扩散程度,进而第一扩散片108射出的激光的发散角度可以接近第二扩散片109射出的激光的发散角度。如此可以保证各色激光的光斑大小一致性较高,各色激光的混合效果更好,且各色激光的均匀性较高,基于混合后的激光形成的投影画面的显示效果较好。
在一具体实施方式中,扩散片可以包括多个平行排布的微型条状棱镜,该棱镜的截面可以呈三角形。该棱镜的顶角越大,则该扩散片对射入的光线的扩散程度越大。该顶角指的是该微型条状棱镜的三角形截面中远离扩散片的角。本申请实施例中,第一扩散片108中各个微型条状棱镜的顶角可以小于第二扩散片109中各个微型条状棱镜的顶角,第一扩散片108中微型条状棱镜的排布密度可以大于第二扩散片109中微型条状棱镜的排布密度。
需要说明的是,图13A以该两个扩散片均位于激光器101与调光镜组102之间为例。激光器101中第一出光区Q1中的第一子区和第二出光区Q2中的第二子区射出的激光,可以分别经过该两个扩散片匀化后射向第一调光镜1021。在一具体实施方式中,该两个扩散片也可以位于调光镜组102与合光镜之间,本申请实施例未对此种情况的投影光源进行示意。此时,第二调光镜1022射出的激光可以经该两个扩散片匀化后再射向第一合光镜103和第二合光镜104。
本申请实施例中以第一扩散片108和第二扩散片109独立设置为例进行示意。在一具体实施方式中,该两个扩散片也可以为一较大的扩散片中的两部分。
在一具体实施方式中,第一扩散片108和第二扩散片109的位置可以固定不变,相对激光器101保持静止。或者,在激光器101发光时,第一扩散片108和第二扩散片109中的至少一个扩散片也可以相对激光器101运动。如该扩散片可以在第一方向上一定范围内来回移动,或者也可以在第二方向上一定范围内来回移动,或者也可以旋转或振动,或者也可以在一定角度范围内来回翻转。若扩散片旋转,则该旋转的转轴可以位于扩散片的中心位置,或者也可以一定程度的偏离该中心位置。扩散片位置变化的范围可以较小,需保证扩散片移动至任意位置激光器101射出的激光均可以射入扩散片。
本申请实施例中,以第一扩散片108和第二扩散片109均呈平板形为例进行示意,也即是扩散片的入光面与出光面可以平行。在一具体实施方式中,扩散片也可以呈楔形,扩散片的入光面与出光面可以不平行。本申请实施例中,第一扩散片108和第二扩散片109
均为透射式扩散片。
需要说明的是,在激光器101与合光镜之间设置匀光部件的上述方式,也可以在其他的投影光源中使用。如也可以在相关技术中的投影光源中使用该方式,本申请实施例不做限定。
通常投影光源中在激光器101射出的各色激光混合之后的光路中,还设置有扩散片,以对混合后的各色激光进行匀化。在一具体实施方式中,投影光源10中按照上述方式设置复眼透镜107或者设置第一扩散片108和第二扩散片109时,投影光源10中在各色激光混合之后的光路中可以不再设置扩散片,以简化投影光源的结构,便于投影光源的小型化。或者,各色激光混合之后的光路中也可以仍设置扩散片,以对混合后的各色激光进行更近一步地匀化。
以及图13B是本申请另一实施例提供的再一种投影光源的结构示意图。如图13B所示,投影光源10也可以包括第一扩散片108和第二扩散片109。该第一扩散片108对射入的激光的扩散程度可以小于第二扩散片109对射入的激光的扩散程度。第一扩散片108在激光器101上的正投影覆盖第一出光区Q1,第二扩散片109在激光器101上的正投影覆盖第二出光区Q2与第三出光区Q3。第一出光区Q1射出的激光可以经第一扩散片108扩散匀化后射向第一合光镜102’,第二出光区Q2射出的激光经第二扩散片109扩散匀化后射向第二合光镜103’,第三出光区Q3射出的激光经第二扩散片109扩散匀化后射向第三合光镜104’。
具体地,在本示例中,扩散片的设置和工作过程可参见图13A示例,不再赘述。
下面结合附图对投影光源10中在各色激光混合之后的光路中扩散片的设置情况进行介绍。下述扩散片的设置情况可以用于上述任一投影光源10,为简便,本申请实施例以图3A所示的投影光源10为基础,来对其中各色激光混合之后的光路中扩散片的设置情况进行介绍。需要说明的是,下面示例中的设置方案同样也适用于图3B及相关实施例所示的投影光源10。
图14是本申请另一实施例提供的又一种投影光源的结构示意图,图15是本申请再一实施例提供的一种投影光源的结构示意图。如图14和图15所示,投影光源10还可以包括至少一个扩散片,该至少一个扩散片位于第一合光镜103和第二合光镜104射出的激光的传输路径上。如该至少一个扩散片位于第一合光镜103远离第二合光镜104的一侧。图14和图15均以该至少一个扩散片包括两个扩散片,分别为第三扩散片108和第四扩散片111为例进行示意。在一具体实施方式中,该至少一个扩散片也可以仅包括一个扩散片,本申请实施例未对此种情况进行示意。
在一具体实施方式中,该至少一个扩散片中每个扩散片对射入的激光在快轴上的扩散程度可以强于在慢轴上的扩散程度。由于激光在射向扩散片时在快轴上的发散角度可以小于在慢轴上的发散角度,如在慢轴上的发散角度可以大于1度,在快轴上的发散角度小于1度。本申请实施例中使扩散片在快轴上的扩散程度较强,进而可以使激光通过扩散片后快轴和慢轴上的发散角度较为接近,激光形成的光斑的长宽比可以较小,可以较为符合对投影光源发出的激光的形状要求。
本申请实施例中,该第三扩散片108和第四扩散片111中每个扩散片均可以满足下述条件中的至少一种:扩散片为反射式扩散片或者透射式扩散片;扩散片为扩散片呈楔形或者平板形;以及,扩散片保持静止,或者扩散片用于在目标范围内平移,或者扩散片用于沿目标方向旋转,或者扩散片用于在目标角度范围内翻转。扩散片在运动时其位置移动的范围可以较小,以避免移动至激光的照射范围之外的情况。第三扩散片108和第四扩散片111中任一扩散片均可以按照任意组合该三种条件来实现。如扩散片可以为平板形的反射式扩散片,且该扩散片可以在1度范围内来回翻转;或者扩散片可以为楔形的透射式扩散片,该扩散片可以在第二方向上一定范围内来回移动;或者扩散片可以为平板形的透射式扩散片,该扩散片以其中心为旋转轴顺时针方向旋转。扩散片还可以有多种可选实现方式,本申请实施例不再列举。
示例地,如图14所示,第三扩散片108可以反射式扩散片,第四扩散片111可以为透射式扩散片,且该两个扩散片均呈平板形。第二合光镜104、第一合光镜103与第三扩散片108可以沿x方向依次排布,第三扩散片108与第四扩散片111可以沿z方向依次排布。第一合光镜103沿x方向射出的激光可以被第三扩散片108扩散,并沿z方向反射至第四扩散片111。第四扩散片111将射入的激光进一步扩散后沿z方向射出。在一具体实施方式中,第三扩散片108可以在x方向和z方向所在平面内进行1度或2度范围内的来回翻转。该过程中第三扩散片108射出的激光会在x方向上存在位移,进而第三扩散片108射出的激光可以具有较为随机的相位,可以减弱该激光形成的投影画面的散斑效应。
如图15所示,第三扩散片108与第四扩散片111可以均为透射式扩散片,第三扩散片108呈楔形,第四扩散片111呈平板形。第二合光镜104、第一合光镜103、第三扩散片108与第四扩散片111可以沿x方向依次排布。第一合光镜103沿x方向射出的激光可以依次被第三扩散片108与第四扩散片111扩散,并沿x方向出射。在一具体实施方式中,第三扩散片108以其中心为转轴进行旋转。第三扩散片108呈楔形,该扩散片108射出的激光可以偏向扩散片108中较宽的部分所在侧。在第三扩散片108的旋转过程中,扩散片108射出的激光的位置可以在圆周方向上持续移动,进而第三扩散片108射出的激光可以具有
较为随机的相位,可以减弱该激光形成的投影画面的散斑效应。
本申请实施例中,投影光源10还可以包括匀光部件112。该匀光部件可以作为投影光源10的出光部件,位于投影光源10中光路的末端。该匀光部件可以将激光进行收集匀化后射向后续的调制光路,以便于后续的画面投影。
如图14和图15所示,该匀光部件112可以为复眼透镜。第三扩散片108和第四扩散片111可以均位于合光镜与复眼透镜之间。在一具体实施方式中,扩散片距复眼透镜的距离可以较大,如第四扩散片111与复眼透镜的距离可以大于10毫米。如此可以使激光从扩散片传输至复眼透镜经过较长距离,使光斑进行一定地扩大。由于复眼透镜对射入的激光的光学扩展量为面积与射入角度的积分,如此复眼透镜射出的激光较多,且对激光的匀光效果较好。
图16是本申请再一实施例提供的另一种投影光源的结构示意图。如图16所示,投影光源10中的匀光部件112也可以为光导管。此时该匀光部件112之前还可以设置有会聚透镜113,以将激光会聚至光导管的入光口。第三扩散片108、会聚透镜113、第四扩散片111和光导管112可以依次排布。在一具体实施方式中,第三扩散片108和第四扩散片111也可以均位于会聚透镜113之前的光路中,本申请实施例不做限定。光导管入光口的长度方向与可以与激光器的慢轴(也即射入的激光的慢轴)平行,宽度方向可以与激光器快轴平行,以保证激光在光导管入光口处形成的光斑与入光口形状的匹配。
综上所述,本申请实施例提供的投影光源中,调光镜组可以将第一出光区中一端的第一子区射出的激光与第二出光区中同一端的第二子区射出的激光,调整至从第三出光区远离第二出光区的一侧分别射向第一合光镜和第二合光镜。如此一来,源自第二出光区的激光在射向第二合光镜时可以分别位于第三出光区射出的激光的两侧,提高了源自第二出光区的激光与源自第三出光区的激光的对称性。进而,经过第一合光镜和第二合光镜混光后各种颜色的激光的对称性及混光均匀性较高,基于该激光形成的投影画面的显示效果可以较好。
图17是本申请实施例提供的一种投影设备的结构示意图。如图17所示,投影设备可以包括投影光源10,光阀20和镜头30。该投影光源可以为上述的任一种投影光源,如可以为图3A至图16中的任一投影光源。图17以该投影设备包括图14所示的投影光源为例。
在一具体实施方式中,该投影设备还可以包括位于投影光源10与光阀20之间的照明镜组40和全内反射棱镜50。投影光源10射出的激光可以射向照明镜组40,以被该照明镜组40会聚并射向全内反射棱镜50;进而该全内反射棱镜50将射入的激光射至光阀20。
光阀20用于将射入的激光调制后射向镜头30,镜头30用于将射入的激光进行投射以形成投影画面。
示例地,光阀20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,以实现对光线的调制。
示例地,该镜头30可以为长焦镜头,或者也可以为超短焦镜头。镜头可以包括多个透镜,各个透镜可以沿某一方向依次排布。从光阀20射出的激光可以依次通过镜头30中的多个透镜射至屏幕,以实现镜头对激光的投射,实现投影画面的显示。
本申请实施例提供的投影设备中,投影光源发出的各色激光的对称性较高,且光斑的一致性较好,进而基于投影光源发出的激光可以形成显示效果较好的投影画面。
需要指出的是,在本申请实施例中,术语“第一”、“第二”和“第三”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。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。本申请中术语“和/或”,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/或B,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。“大致”、“约”、“基本”以及“接近”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。
在附图中,为了图示的清晰可能夸大了层和区域的尺寸。而且可以理解,当元件或层被称为在另一元件或层“上”时,它可以直接在其他元件上,或者可以存在中间的层。通篇相似的参考标记指示相似的元件。本申请中的投影光源实施例可以与投影设备实施例相互参考。
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。
Claims (11)
- 一种投影光源,其特征在于,所述投影光源包括:激光器、调光镜组、第一合光镜和第二合光镜,所述第一合光镜和所述第二合光镜均位于所述调光镜组远离所述激光器的一侧;所述激光器包括用于分别射出不同颜色的激光的第一出光区、第二出光区和第三出光区;所述第二出光区与所述第三出光区位于所述第一出光区在第一方向上的同一侧,且沿第二方向依次排布,所述第一方向垂直所述第二方向;所述第二出光区中位于远离所述第三出光区的一端的部分区域为第二子区,所述第一出光区中位于所述一端的部分区域为第一子区;所述调光镜组用于将所述第一子区射出的激光和所述第二子区射出的激光,调整至从所述第三出光区远离所述第二出光区的一侧分别射向所述第一合光镜和所述第二合光镜;所述第一出光区中所述第一子区之外的区域射出的激光射向所述第一合光镜,所述第二出光区中所述第二子区之外的区域和所述第三出光区射出的激光射向所述第二合光镜;所述第一合光镜与所述第二合光镜均用于将射入的激光沿所述第一方向出射。
- 根据权利要求1所述的投影光源,其特征在于,所述调光镜组包括沿所述第二方向依次排布的第一调光镜和第二调光镜;所述第一调光镜在所述激光器上的正投影覆盖所述第一子区和所述第二子区;所述第二调光镜在所述激光器上的正投影位于所述第三出光区远离所述第二出光区的一侧;所述第一子区与所述第二子区射出的激光射向所述第一调光镜,所述第一调光镜用于将射入的激光反射向所述第二调光镜,所述第二调光镜用于将射入的源自所述第一子区的激光反射向所述第一合光镜,将射入的源自所述第二子区的激光反射向所述第二合光镜。
- 根据权利要求2所述的投影光源,其特征在于,所述第一调光镜与所述第二调光镜均呈长方形,且所述长方形的长度方向平行所述第一方向。
- 根据权利要求2所述的投影光源,其特征在于,所述第一调光镜包括第一子镜片和第二子镜片,所述第二调光镜包括第三子镜片和第四子镜片;所述第一子镜片在所述激光器上的正投影覆盖所述第一子区,所述第二子镜片在所述激光器上的正投影覆盖所述第二子区;所述第一子镜片与所述第三子镜片沿所述第二方向依次排布,所述第二子镜片与所述第四子镜片沿所述第二方向依次排布;所述第一子区射出的激光射向所述第一子镜片,所述第一子镜片用于将射入的激光反射向所述第三子镜片,所述第三子镜片用于将射入的激光反射向所述第一合光镜;所述第二子区射出的激光射向所述第二子镜片,所述第二子镜片用于将射入的激光射向所述第四子镜片,所述第四子镜片用于将射入的激光反射向所述第二合光镜。
- 根据权利要求1至4任一所述的投影光源,其特征在于,所述第二子区为所述第二出光区的一半区域。
- 根据权利要求1至4任一所述的投影光源,其特征在于,所述第一出光区射出的激光的发散角度大于所述第二出光区和所述第三出光区射出的激光的发散角度;所述投影光源还包括复眼透镜,所述复眼透镜在所述激光器上的正投影覆盖所述第一出光区、所述第二出光区和所述第三出光区,所述激光器射出的激光经所述复眼透镜匀化后射向所述第一合光镜和所述第二合光镜;所述复眼透镜包括多个微透镜,所述微透镜在射入的激光的慢轴上的长度大于快轴上的长度。
- 根据权利要求1至4任一所述的投影光源,其特征在于,所述第一出光区射出的激光的发散角度大于所述第二出光区和所述第三出光区射出的激光的发散角度;所述投影光源还包括第一扩散片和第二扩散片,所述第一扩散片对激光的扩散程度小于所述第二扩散片对激光的扩散程度;所述第一扩散片在所述激光器上的正投影覆盖所述第一出光区,所述第二扩散片在所述激光器上的正投影覆盖所述第二出光区与所述第三出光区,所述第一出光区射出的激光经所述第一扩散片扩散匀化后射向所述第一合光镜,所述第二出光区和所述第三出光区射出的激光经所述第二扩散片扩散匀化后射向所述第二合光镜。
- 根据权利要求1至4任一所述的投影光源,其特征在于,所述投影光源还包括:至少一个扩散片,所述至少一个扩散片位于所述第一合光镜和所述第二合光镜射出的激光的传输路径上;所述扩散片对射入的激光在快轴上的扩散程度强于在慢轴上的扩散程度。
- 根据权利要求8所述的投影光源,其特征在于,所述扩散片满足下述条件中的至少一种:所述扩散片为反射式扩散片或者透射式扩散片;所述扩散片为所述扩散片呈楔形或者平板形;以及,所述扩散片保持静止,或者所述扩散片用于在目标范围内平移,或者所述扩散片用于沿目标方向旋转,或者所述扩散片用于在目标角度范围内翻转。
- 根据权利要求8所述的投影光源,其特征在于,所述投影光源还包括复眼透镜,所述至少一个扩散片位于所述第一合光镜与所述复眼透镜之间;或者,所述投影光源还包括会聚透镜和光导管;所述至少一个扩散片、所述会聚透镜与所述光导管依次排布;或者,所述至少一个扩散片包括第三扩散片和第四扩散片,所述第三扩散片、所述会聚透镜、所述第四扩散片与所述光导管依次排布。
- 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10任一所述的投影光源,以及光阀和镜头;所述投影光源用于向所述光阀射出激光,所述光阀用于将射入的激光调制后射向所述镜头,所述镜头用于将射入的激光进行投射以形成投影画面。
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