CN-121995644-A - Laser projection device and wearable device

CN121995644ACN 121995644 ACN121995644 ACN 121995644ACN-121995644-A

Abstract

The application discloses laser projection equipment and wearable equipment, which comprises a laser display assembly and a light combining assembly, wherein the laser display assembly comprises three groups of microcavity laser arrays, each group of microcavity laser arrays comprises a plurality of laser units, the laser units in the three groups of microcavity laser arrays have a corresponding relation, the three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image, the light combining assembly is used for combining laser beams emitted by the laser units with the corresponding relation to one pixel point, so that the green laser image, the blue laser image and the red laser image are combined to form a target laser image, the controller is electrically connected with the laser display assembly, and is used for receiving driving signals and controlling display parameters of each laser unit according to the driving signals, and a lens is arranged on a light emitting path of the light combining assembly, receives the target laser image emitted by the light combining assembly and emits the projection image.

Inventors

WANG ZHIHAO
ZHANG JIANCHAO
TIAN YOULIANG
LIU QINGJIANG
YANG XIAONA
LI DAN

Assignees

青岛海信激光显示股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241105

Claims (15)

1.A laser projection device, comprising: A laser display assembly; The light combining component is arranged on the light emitting path of the laser display component; A lens for emitting a projection image; the laser display assembly includes: Each group of microcavity laser arrays comprises a plurality of laser units, a corresponding relation is arranged among the laser units in the three groups of microcavity laser arrays, and the three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image; the light combining component is used for combining the laser beams emitted by the laser units with the corresponding relation to one pixel point, so that the green laser image, the blue laser image and the red laser image are combined to form a target laser image; the controller is electrically connected with the laser display assembly and is used for receiving driving signals and controlling display parameters of each laser unit according to the driving signals; The lens is arranged on the light emitting path of the light combining component, receives the target laser image emitted by the light combining component and emits the projection image.
2. A laser projection device, comprising: A laser display assembly; The light combining component is arranged on the light emitting path of the laser display component; A lens for emitting a projection image; the laser display assembly includes: The three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image, and laser beams emitted by the laser units with the corresponding relations are emitted into the light combining component and are reflected by the light combining component to be combined into one pixel point, so that the green laser image, the blue laser image and the red laser image are combined into a target laser image; the controller is electrically connected with the laser display assembly and is used for receiving driving signals and controlling display parameters of each laser unit according to the driving signals; The lens is arranged on the light emitting path of the light combining component, receives the target laser image emitted by the light combining component and emits the projection image.
3. The laser projection device as claimed in claim 1 or 2, wherein, The microcavity laser array is one of a micro laser diode array, a vertical cavity surface emitting laser array, a resonant cavity light emitting diode array, an edge emitting laser array, a micro resonant cavity light emitting diode array, a micro light emitting diode array, a mini light emitting diode array, a quantum dot light emitting diode array, an organic light emitting diode array or a microscale organic light emitting diode array.
4. The laser projection device of claim 1 or 2, wherein the three sets of microcavity laser arrays comprise a first microcavity laser array, a second microcavity laser array and a third microcavity laser array, and the light combining assembly comprises: The first light combining piece is positioned on the light emitting path of the first microcavity laser array and is used for reflecting laser beams emitted by the laser units in the first microcavity laser array; The second light combining piece is used for reflecting the laser beams emitted by the laser units in the second microcavity laser array and transmitting the laser beams emitted from the first light combining piece; The third light combining piece is used for reflecting the laser beams emitted by the laser units in the third microcavity laser array and transmitting the laser beams emitted from the second light combining piece.
5. A laser projection device as claimed in claim 4, wherein, The first light combining piece, the second light combining piece and the third light combining piece are arranged in parallel.
6. The laser projection device as claimed in claim 1 or 2, wherein, In any of the microcavity laser arrays, the diameter of the laser unit is D1, D1 satisfying D1>0.7 μm and D1<800 μm.
7. The laser projection device as claimed in claim 1 or 2, wherein, In any of the microcavity laser arrays, the spacing between the center of each of the laser units and the center of an adjacent one of the laser units along the same row or column is L1, L1 satisfying L1>1.5 μm, L1<1600 μm.
8. The laser projection device as claimed in claim 1 or 2, wherein, In any group of microcavity laser arrays, Q laser units are arranged into laser unit combinations according to a preset pattern, a plurality of laser unit combination arrays are arranged, the preset pattern is polygonal, and Q is a positive integer more than or equal to 3.
9. The laser projection device as claimed in claim 1 or 2, wherein, In any group of the microcavity laser arrays, a plurality of the laser units are arranged in M rows and N columns, and a display area of the microcavity laser array comprises A rows and B columns of the laser units, wherein A < M and B < N; And the three groups of the microcavity laser arrays are in one-to-one correspondence with the laser units in the display area.
10. The laser projection device as claimed in claim 1 or 2, wherein, The three groups of microcavity laser arrays comprise a first microcavity laser array, a second microcavity laser array and a third microcavity laser array; The first microcavity laser array comprises a first substrate and the plurality of laser units formed on the first substrate, and the laser units in the first microcavity laser array are used for emitting green laser beams; the second microcavity laser array comprises a second substrate and the plurality of laser units formed on the second substrate, and the laser units in the second microcavity laser array are used for emitting blue laser beams; The third microcavity laser array comprises a third substrate and the plurality of laser units formed on the third substrate, and the laser units in the third microcavity laser array are used for emitting red laser beams; the first substrate and the second substrate are of an integrated structure.
11. The laser projection device of claim 10, wherein the controller comprises: The first driving circuit is electrically connected with the first microcavity laser array and the second microcavity laser array; and the second driving circuit is electrically connected with the third microcavity laser array.
12. The laser projection device of claim 11, wherein the laser projection device is configured to, The first driving circuit comprises a plurality of first sub-driving units which are arranged in an array mode, the plurality of first sub-driving units are respectively in one-to-one correspondence with the plurality of laser units in the first microcavity laser array and the second microcavity laser array, each first sub-driving unit outputs a first sub-driving signal to a corresponding one of the first microcavity laser array or the second microcavity laser array according to the driving signals so as to adjust display parameters of the laser units, the second driving circuit comprises a plurality of second sub-driving units which are arranged in an array mode, the plurality of second sub-driving units are respectively in one-to-one correspondence with the plurality of laser units in the third microcavity laser array, and each second sub-driving unit outputs a second sub-driving signal to a corresponding one of the laser units in the third microcavity laser array according to the driving signals so as to adjust the display parameters of the laser units.
13. The laser projection device of claim 1 or 2, wherein the light combining assembly further comprises: and each collimating element corresponds to one microcavity laser array, and is positioned between one microcavity laser array and the light combining assembly and used for collimating laser beams.
14. The laser projection device of claim 13, wherein the laser projection device is configured to, The collimating element is a micro-lens area array element, the micro-lens area array element comprises a plurality of micro-lens units, and the micro-lens units are in one-to-one correspondence with the laser units so as to collimate laser beams emitted by the laser units.
15. A wearable device, comprising: A wearing body including a lens; The camera is arranged on the wearing main body and is used for shooting a first video; The processing device is arranged on the wearing main body and connected with the camera, and can process the first video into a driving signal; The laser display assembly is arranged on the wearing main body and comprises three groups of microcavity laser arrays, each group of microcavity laser arrays comprises a plurality of laser units, the three groups of microcavity laser arrays have corresponding relations among the laser units, and the three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image: the controller is electrically connected with the laser display assembly and the processing device and is used for controlling the display parameters of each laser unit according to the driving signals; The light combining component is arranged on the wearing main body and positioned on the light emitting path of the laser display component, and the light combining component combines the laser beams emitted by the laser units with corresponding relations to one pixel point, so that the red laser image, the green laser image and the blue laser image are combined to form a target laser image; the light reflection element is arranged on the wearing body and positioned on the light emitting path of the light combining component, and the light reflection element is used for reflecting the target laser image emitted by the light combining component to the lens.

Description

Laser projection device and wearable device Technical Field The application relates to the technical field of laser projection display, in particular to laser projection equipment and wearable equipment. Background In projection devices, the characteristics of excellent monochromaticity, wide color gamut coverage, long service life, high brightness, low energy consumption and the like of a laser light source are widely applied in the technical field of projection display. Currently, laser projection devices commonly employ three-color lasers to emit three basic laser beams, green, blue and red. The light beams are processed by a series of optical elements such as a reflecting sheet, a dichroic sheet, a diffusion sheet, a lens group and the like, finally focused on the surface of a digital micro-mirror device (Digital Micromirror Device, a DMD) to reflect and form an image, and then amplified and projected onto a screen through a projection lens. The digital micromirror device comprises a plurality of micro high reflection aluminum micromirrors, each representing a pixel, and reflects light beams to the projection lens by controlling the deflection of + -12 DEG through digital signals, and the unreflected light beams are wasted. Thus, the use of digital micromirror devices can reduce the beam utilization of laser projection devices. Meanwhile, the cost of the digital micromirror device is high, which also makes it difficult to further reduce the cost of the laser projection apparatus. Disclosure of Invention The embodiment of the application discloses laser projection equipment, which can further reduce the production cost of the laser projection equipment and improve the beam utilization rate of the laser projection equipment. To achieve the above object, an embodiment of the present application discloses a laser projection apparatus, including: A laser display assembly; the light combining component is arranged on the light emitting path of the laser display component; The lens is used for emitting a projection image; The laser display assembly includes: Each group of microcavity laser arrays comprises a plurality of laser units, the laser units in the three groups of microcavity laser arrays have corresponding relations, and the three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image: The light combining component is used for combining the laser beams emitted by the laser units with the corresponding relation to one pixel point, so that the green laser image, the blue laser image and the red laser image are combined to form a target laser image; The controller is electrically connected with the laser display assembly and is used for receiving the driving signals and controlling the display parameters of each laser unit according to the driving signals; The lens is arranged on the light-emitting path of the light-combining component, receives the target laser image emitted by the light-combining component and emits a projection image. The embodiment of the application also provides laser projection equipment, which comprises: A laser display assembly; the light combining component is arranged on the light emitting path of the laser display component; The lens is used for emitting a projection image; The laser display assembly includes: The three groups of microcavity laser arrays are respectively used for generating a green laser image, a blue laser image and a red laser image, and laser beams emitted by the laser units with the corresponding relations are emitted into a light combining component and are reflected by the light combining component to be combined into a pixel point, so that the green laser image, the blue laser image and the red laser image are respectively reflected by the light combining component to be combined into a target laser image; The controller is electrically connected with the laser display assembly and is used for receiving the driving signals and controlling the display parameters of each laser unit according to the driving signals; The lens is arranged on the light-emitting path of the light-combining component, receives the target laser image emitted by the light-combining component and emits a projection image. In this way, the laser projection device provided by the embodiment of the application can obtain the target laser image by independently controlling the display parameters of each laser unit in the laser display assembly through the controller and combining the laser beams emitted by the three groups of microcavity laser arrays through the light combining assembly. The light combining component projects the target laser image to the lens for amplification, and then the projection image can be directly projected, so that a digital micro-mirror device or other image processing elements are not required to be configured in the laser projection equipment to reprocess the laser beam. On o