CN-115939925-B - Laser and projection light source

CN115939925BCN 115939925 BCN115939925 BCN 115939925BCN-115939925-B

Abstract

The application discloses a laser and a projection light source, and belongs to the technical field of photoelectricity. The laser comprises a base plate, a plurality of tube walls, a plurality of groups of light emitting chips and a plurality of collimating lens groups, wherein laser emitted by different groups of light emitting chips are different in color, the tube walls are annular, the tube walls correspond to the groups of light emitting chips one by one, each tube wall surrounds a corresponding group of light emitting chips, each group of light emitting chips is arranged in a row along a first direction, the collimating lens groups correspond to the tube walls one by one, each collimating lens group is located on one side, away from the base plate, of the corresponding tube wall, each collimating lens group comprises a plurality of collimating lenses, each collimating lens corresponds to each light emitting chip surrounded by the tube wall corresponding to the collimating lens group one by one, and each collimating lens is located on a transmission path of laser emitted by the corresponding light emitting chip. The application solves the problem of lower light-emitting collimation degree of the laser. The application is used for emitting light.

Inventors

YAN KE
TIAN YOULIANG
LI WEI

Assignees

青岛海信激光显示股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221212
Priority Date: 20220314

Claims (13)

1. A laser is characterized by comprising a bottom plate, a plurality of tube walls, a plurality of groups of light emitting chips and a plurality of collimating lens groups, wherein the colors of laser emitted by the light emitting chips in different groups are different; The LED lamp comprises a base plate, a plurality of tube walls, a plurality of groups of luminous chips, a plurality of LED lamp holders and a plurality of groups of LED lamp holders, wherein the tube walls and the LED lamp holders are all positioned on the base plate; The light emitting device comprises a base plate, a plurality of collimating lens groups and a plurality of collimating lens, wherein the plurality of collimating lens groups are in one-to-one correspondence with the plurality of tube walls, each collimating lens group is positioned on one side, far away from the base plate, of the corresponding tube wall, each collimating lens group comprises a plurality of collimating lenses, the plurality of collimating lenses are in one-to-one correspondence with each light emitting chip surrounded by the tube wall corresponding to the collimating lens groups, and each collimating lens is positioned on a transmission path of laser emitted by the corresponding light emitting chip.
2. The laser of claim 1, wherein a slow axis of the laser light emitted by each of the light emitting chips is parallel to the first direction.
3. The laser of claim 1, wherein the plurality of tube walls are arranged in sequence along a second direction, the second direction being perpendicular to the first direction.
4. A laser as claimed in claim 3 wherein the length of the tube wall in the first direction is greater than the length in the second direction.
5. The laser according to any one of claims 1 to 4, wherein the plurality of sets of light emitting chips includes two sets of light emitting chips, one set of light emitting chips including a first type of light emitting chip and the other set of light emitting chips including a second type of light emitting chip and a third type of light emitting chip, and wavelengths of laser light emitted from the first type of light emitting chip, the second type of light emitting chip and the third type of light emitting chip decrease in order; the number of the first type of light emitting chips is greater than the number of the second type of light emitting chips and greater than the number of the third type of light emitting chips.
6. A laser as defined in claim 5, wherein, The number of the first type light emitting chips is equal to or smaller than the sum of the number of the second type light emitting chips and the number of the third type light emitting chips, and/or, The number of the second type of light emitting chips is greater than the number of the third type of light emitting chips.
7. The laser according to any one of claims 1 to 4, wherein the plurality of light emitting chips includes two light emitting chips, one light emitting chip is a first type light emitting chip, the same color of laser light is emitted, and the wavelengths of the laser light emitted by the light emitting chips in the first type light emitting chip differ by 4nm to 10nm; the other group of light-emitting chips comprises a second type of light-emitting chip and a third type of light-emitting chip, and the other group of light-emitting chips emits laser light with different colors.
8. A projection light source, characterized in that the projection light source comprises the laser according to any one of claims 1 to 7, a light converging lens group, a converging lens and a light homogenizing component; the light converging lens group is positioned on the light emitting side of the laser, and the light converging lens group, the converging lens and the light homogenizing component are sequentially arranged along the target direction; The focusing lens group is used for mixing laser emitted by the laser and then emitting the mixed laser to the converging lens along the target direction, the converging lens is used for converging the emitted laser to the light homogenizing component, and the light homogenizing component is used for homogenizing the emitted laser and then emitting the homogenized laser.
9. The projection light source of claim 8, wherein the projection light source comprises a light source, The light combining lens group comprises: a first mirror configured to reflect at least one of the laser light of the plurality of colors, and A first dichroic mirror located at a side of the first reflecting mirror near the converging lens, the first dichroic mirror configured to transmit the laser light of the at least one color and reflect laser light of a remaining color among the laser light of the plurality of colors.
10. The projection light source of claim 8, wherein the projection light source comprises a light source, The light combining lens group comprises: a light combining prism comprising: A first mirror configured to reflect the laser light of the first color and transmit the laser light of the second color, the laser light of the third color being refracted at the first mirror, and A second mirror configured to reflect the laser light of the third color, the reflected laser light of the third color being refracted again on the first mirror; a second reflecting mirror, located on the reflecting light path of the light combining prism, configured to reflect the laser light of the first color and the laser light of the third color; a third mirror configured to reflect the laser light of the second color, and And a second dichroic mirror located at an intersection of the reflection optical path of the second reflecting mirror and the reflection optical path of the third reflecting mirror, configured to transmit the laser light of the first color and the laser light of the third color, and reflect the laser light of the second color.
11. A projection light source, characterized in that it comprises at least two lasers according to any one of claims 1 to 7, and a light combining lens group, a diffusing member and a light homogenizing member; the light converging lens group is used for converging the laser emitted by the at least two lasers and emitting the laser to the diffusion component; The diffusion component is used for performing angle diffusion on the combined light beam, and outputting the combined light beam after being incident to the light homogenizing component for homogenizing; wherein, the light combination of each laser is three-color laser.
12. The projection light source of claim 11, wherein the light combining lens group comprises a plurality of reflecting mirrors and a plurality of dichroic light combining mirrors, which are respectively used for combining the laser beams emitted by each laser, and the combined light beams of each laser are not overlapped.
13. The projection light source of claim 11, wherein the diffuser comprises a vibrating diffuser or a rotating diffuser.

Description

Laser and projection light source The present embodiment claims priority from chinese patent application No. 202210246346.4, entitled "laser and projection light source" filed on day 3 and 14 of 2022, the entire contents of which are incorporated herein by reference. Technical Field The present application relates to the field of photoelectric technology, and in particular, to a laser and a projection light source. Background With the development of photoelectric technology, lasers are widely used, and the requirements on the light emission of the lasers are higher and higher. Fig. 1 is a schematic structural diagram of a laser provided in the related art. As shown in fig. 1, the laser 00 includes a base plate 001, an annular side wall 002, a plurality of conductive pins 003, a plurality of light emitting chips 004, and a collimator lens set 005. Wherein, the side wall 002 and the light emitting chips 004 are fixed on the bottom plate 001, and the side wall 002 surrounds the light emitting chips 004. The plurality of light emitting chips 004 may include at least two types of light emitting chips, and the colors of laser light emitted from different types of light emitting chips are different. The plurality of conductive pins 003 penetrate the sidewall 002 to transmit current to the light emitting chip 004. The collimating lens set 005 includes a plurality of collimating lenses T integrally formed, the plurality of collimating lenses T are in one-to-one correspondence with the plurality of light emitting chips 004, and the laser emitted by each light emitting chip 004 is transmitted to the corresponding collimating lens T, and is then collimated by the collimating lens T and emitted. When assembling the collimator lens group 005, it is necessary to align each collimator lens T with the corresponding light emitting chip 004. In the related art, there is a high possibility that an error occurs when the alignment of the collimator lens set 005 is performed, and thus the light-emitting collimation of the laser 00 is low. Disclosure of Invention The application provides a laser and a projection light source, which can solve the problem of low light-emitting collimation degree of the laser. The technical scheme comprises the following steps: one aspect provides a laser, comprising a bottom plate, a plurality of tube walls, a plurality of groups of light emitting chips and a plurality of collimating lens groups, wherein the colors of laser emitted by the light emitting chips in different groups are different; the plurality of tube walls and the plurality of groups of light emitting chips are all positioned on the bottom plate; the tube wall is annular, a plurality of tube walls are in one-to-one correspondence with a plurality of groups of light emitting chips, and each tube wall surrounds a corresponding group of light emitting chips; The light emitting device comprises a base plate, a plurality of collimating lens groups and a plurality of light emitting chips, wherein the plurality of collimating lens groups are in one-to-one correspondence with the plurality of tube walls, each collimating lens group is positioned on one side, far away from the base plate, of the corresponding tube wall, each collimating lens group comprises a plurality of collimating lenses, the plurality of collimating lenses are in one-to-one correspondence with the light emitting chips surrounded by the tube wall corresponding to the collimating lens groups, and each collimating lens is positioned on a transmission path of laser emitted by the corresponding light emitting chip. On the other hand, a projection light source is provided, wherein the projection light source comprises the laser, a light converging lens group, a converging lens and a light homogenizing component; The light converging lens group is positioned on the light emitting side of the laser, and the light converging lens group, the converging lens and the light homogenizing component are sequentially arranged along the target direction; the converging lens is used for converging the injected laser to the light homogenizing component, and the light homogenizing component is used for homogenizing the injected laser and then emitting the homogenized laser. In still another aspect, a projection light source is provided, which includes at least two lasers, a light converging lens group, a diffusion component and a light homogenizing component, wherein the light converging lens group is used for converging laser light emitted by the at least two lasers and directing the laser light to the diffusion component, the diffusion component is used for angle-diffusing the converging light beam and making the converging light beam enter the light homogenizing component for homogenizing and outputting, and the converging light of each laser is three-color laser. The technical scheme provided by the application has the beneficial effects that at least: In the application, the laser compris