Laser projection device
The coherent light in the laser projection device is converted into incoherent light through quantum mechanisms and plastic shaping mechanisms, and the speckle problem of the laser projection device is solved through optical adjustment technology and the imaging effect is improved.
Patent Information
- Application Number
- CN202421131015.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Traditional laser projection devices are prone to speckle caused by interference, which affects the imaging effect.
The quantum mechanism is used to convert the coherent light of the three primary color lasers of red, blue and green into incoherent light, and transmit it in the same direction through the shaping mechanism. The light direction is adjusted by using the reflector and the reflector to ensure the particle size and distribution of the quantum dots. Uniform, reduce interference.
It effectively reduces speckle on the laser projection device and improves the clarity and fidelity of imaging.
Smart Images
Figure CN222365182U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of laser projection technology, and in particular to a laser projection device. Background Art
[0002] Laser projection devices use red, green and blue primary color lasers as light sources for projection, which can reproduce the rich and gorgeous colors of the objective world in the most realistic way, providing more shocking expression. From the perspective of colorimetry, the color gamut coverage of laser display can reach more than 90% of the color space that the human eye can recognize, which is more than twice the color gamut coverage of traditional displays, allowing people to see the most realistic and gorgeous world through display terminals. However, for traditional laser projection devices, speckle is easily generated due to interference, but the presence of speckle will ultimately affect the imaging effect of the laser projection device. Summary of the invention
[0003] A technical problem solved by the present application is how to improve the speckle elimination performance of a laser projection device.
[0004] A laser projection device, comprising:
[0005] A laser light source for generating coherent light;
[0006] A quantum mechanism, used to convert the coherent light into incoherent light, the quantum mechanism comprising a red quantum unit, a blue quantum unit and a green quantum unit for receiving the coherent light at different times, the particle sizes of quantum dots included in the red quantum unit, the blue quantum unit and the green quantum unit are different;
[0007] A shaping mechanism is used to make the incoherent light from the red quantum unit, the blue quantum unit and the green quantum unit be transmitted in the same direction.
[0008] In one embodiment, a reflector is further included, wherein the reflector receives the coherent light and is capable of rotating, and the quantum mechanism is fixed; when the reflector rotates, the reflector transmits the coherent light to the red quantum unit, the blue quantum unit and the green quantum unit respectively at different times.
[0009] In one embodiment, during the rotation process, the reflector is a plane mirror and is set at an acute angle to the coherent light. The reflector reflects the coherent light to form a first light ray at a first position, reflects the coherent light to form a second light ray at a second position, and reflects the coherent light to form a third light ray at a third position. The first light ray is perpendicular to the coherent light, the second light ray and the third light ray are respectively located on opposite sides of the first light ray, and the angles between the second light ray and the third light ray and the first light ray are equal.
[0010] In one embodiment, the green quantum unit receives the first light, one of the blue quantum unit and the red quantum unit receives the second light, and the other receives the third light.
[0011] In one embodiment, the red quantum unit, the blue quantum unit and the green quantum unit are arranged along a straight line parallel to the coherent light between the reflector and the laser light source, and the green quantum unit is located between the red quantum unit and the blue quantum unit.
[0012] In one embodiment, the reflector is a plane mirror. In a first position, the reflector is perpendicular to the coherent light and transmits the coherent light to form a first light ray; in a second position, the reflector forms an acute angle with the coherent light and reflects the coherent light to form a second light ray; in a third position, the reflector forms an acute angle with the coherent light and reflects the coherent light to form a third light ray; the reflector in the second position is perpendicular to the reflector in the third position, the first light ray and the coherent light have the same transmission direction, the second light ray and the third light ray have opposite transmission directions and are perpendicular to the coherent light between the reflector and the laser light source.
[0013] In one embodiment, the green quantum unit is perpendicular to the coherent light and receives the first light, the red quantum unit and the blue quantum unit are located on opposite sides of the coherent light, one of the red quantum unit and the blue quantum unit receives the second light and the other receives the third light.
[0014] In one of the embodiments, it also includes a first reflector, a second reflector, a third reflector and a fourth reflector; the first reflector and the fourth reflector are parallel to the reflector located at the second position, and the second reflector and the third reflector are parallel to the reflector located at the third position; the second light passing through the quantum mechanism is reflected by the first reflector and the second reflector in sequence to form a light parallel to the third light and in the same transmission direction, and the third light passing through the quantum mechanism is reflected by the third reflector and the fourth reflector in sequence to form a light parallel to the second light and in the same transmission direction.
[0015] In one embodiment, the quantum mechanism is capable of moving in a straight line perpendicular to the coherent light, and the red quantum unit, the blue quantum unit and the green quantum unit are arranged along a straight line perpendicular to the coherent light. When the quantum mechanism moves, the coherent light is respectively transmitted to the red quantum unit, the blue quantum unit and the green quantum unit at different times.
[0016] In one of the embodiments, it further comprises an elastic member, one end of which is fixedly connected, and the other end of which is connected to the quantum mechanism.
[0017] In one embodiment, at least one of the following schemes is also included:
[0018] When arranged in a straight line, the red quantum unit, the blue quantum unit and the green quantum unit are connected as a whole or spliced with each other;
[0019] The red quantum unit, the blue quantum unit and the green quantum unit all further include a shell, and the quantum dots are evenly distributed in the shell;
[0020] The particle size of the quantum dots of the red quantum unit is 2.5nm to 3.5nm, the particle size of the quantum dots of the green quantum unit is 1nm to 2nm, and the particle size of the quantum dots of the blue quantum unit is 0.5nm to 1.5nm;
[0021] Also included is an imaging element, the imaging element is used to receive light from the shaping mechanism to form an image;
[0022] The coherent light is a blue laser or an ultraviolet laser;
[0023] The incoherent light passing through the red quantum unit, the blue quantum unit and the green quantum unit is parallel to each other or located in the same straight line after passing through the shaping mechanism.
[0024] A technical effect of an embodiment of the present application is: since the red quantum unit, the blue quantum unit and the green quantum unit receive coherent light at different times and convert the coherent light into incoherent light under the action of quantum dots, this can effectively avoid the interference caused by the coherent light, thereby reducing the speckle on the image formed by the laser projection device, and ultimately improving the laser projection device's performance in eliminating speckle. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] FIG. 1 is a schematic diagram of a planar structure of a laser projection device provided by an embodiment.
[0026] FIG. 2 is a schematic diagram of a planar structure of a laser projection device provided in another embodiment.
[0027] FIG. 3 is a schematic diagram of a planar structure of a laser projection device provided in yet another embodiment.
[0028] Figure numerals: laser projection device 10, laser light source 100, coherent light 110, quantum mechanism 200, red quantum unit 210, blue quantum unit 220, green quantum unit 230, shell 241, quantum dot 242, shaping mechanism 300, reflector 400, first position 410, second position 420, third position 430, first light ray 401, second light ray 402, third light ray 403, first reflector 510, second reflector 520, third reflector 530, fourth reflector 540, elastic member 600, imaging element 700. DETAILED DESCRIPTION
[0029] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0030] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0032] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0033] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0035] Referring to FIG. 1 , a laser projection device 10 is provided in one embodiment of the present application, including a laser light source 100, a quantum mechanism 200, and a shaping mechanism 300. The laser light source 100 is used to generate coherent light 110, the quantum mechanism 200 is used to convert the coherent light 110 into incoherent light, and the shaping mechanism 300 is used to integrate the incoherent light from the quantum mechanism 200, so that the shaping mechanism 300 transmits the incoherent light in the same direction. The incoherent light from the shaping mechanism 300 can be received by the imaging element 700 to display an image. Since the light passing through the quantum mechanism 200 is incoherent light, the interference caused by the coherent light 110 can be effectively avoided, thereby reducing the speckle appearing on the imaging element 700, and ultimately improving the laser projection device 10's performance in eliminating speckle.
[0036] Referring to FIG. 1 , in some embodiments, a laser light source 100 generates coherent light 110 , which can be a blue laser or an ultraviolet laser, etc. The quantum mechanism 200 includes a red quantum unit 210 , a blue quantum unit 220 , and a green quantum unit 230 , and the red quantum unit 210 , the blue quantum unit 220 , and the green quantum unit 230 can all be in the shape of a flat plate. For example, the red quantum unit 210 , the blue quantum unit 220 , and the green quantum unit 230 can be arranged in a straight line, so that the red quantum unit 210 , the blue quantum unit 220 , and the green quantum unit 230 can be spliced or connected to each other as a whole. For another example, the red quantum unit 210 , the blue quantum unit 220 , and the green quantum unit 230 can not be arranged in a straight line, so that the three are discrete and located at different positions.
[0037] Referring to FIG. 1 , the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 may all include a shell 241 and granular quantum dots 242, and the quantum dots 242 may be evenly distributed in the shell 241, so that the shell 241 serves as a carrier for receiving the quantum dots 242. The shell 241 may be made of glass material, and the shell 241 has the characteristic of high temperature resistance. The particle size of the quantum dots 242 in the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 is different, and the particle size may be understood as the diameter of the quantum dots 242. The particle size of the quantum dots 242 of the red quantum unit 210 is 2.5 nm to 3.5 nm, for example, the particle size of the quantum dots 242 of the red quantum unit 210 may be specifically 3 nm, and under the action of the quantum dots 242, the coherent light 110 passing through the red quantum unit 210 may be converted into red incoherent light with a half-wave width of less than 30 nm. The particle size of the quantum dot 242 of the green quantum unit 230 is 1.5nm to 2nm, for example, the particle size of the quantum dot 242 of the green quantum unit 230 can be specifically 1.5nm. Under the action of the quantum dot 242, the coherent light 110 passing through the green quantum unit 230 can be converted into green incoherent light with a half-wave width of less than 30nm. The particle size of the quantum dot 242 of the blue quantum unit 220 is 1.5nm to 2nm, for example, the particle size of the quantum dot 242 of the green quantum unit 230 can be specifically 1nm. Under the action of the quantum dot 242, the coherent light 110 passing through the blue quantum unit 220 can be converted into blue incoherent light with a half-wave width of less than 30nm. In view of the relatively small half-wave width, the color gamut of the incoherent light can be reasonably improved, thereby improving the clarity and fidelity of the imaging of the laser projection device 10.
[0038] Referring to FIG. 1 , in some embodiments, the laser projection device 10 further includes a reflector 400, which may be a flat plane mirror, and the reflector 400 may rotate around a fixed axis. The red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 are fixed, and when the reflector 400 rotates to different positions, the reflector 400 transmits the coherent light 110 to the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 at different times. The rotation of the reflector 400 may be achieved by a stepping motor, thereby improving the rotation accuracy of the reflector 400.
[0039] Referring to FIG. 1 , for example, during the rotation process, the reflector 400 is arranged at an acute angle with the coherent light 110, and the reflector 400 may have a first position 410, a second position 420, and a third position 430. When the reflector 400 is located at the first position 410, the coherent light 110 is reflected by the reflector 400 to form a first light ray 401, and the first light ray 401 is perpendicular to the coherent light 110. At this time, the incident angle of the coherent light 110 is 45°. When the reflector 400 is located at the second position 420, the coherent light 110 is reflected by the reflector 400 to form a second light ray 402. At this time, the incident angle of the coherent light 110 is greater than 45°. When the reflector 400 is located at the third position 430, the coherent light 110 is reflected by the reflector 400 to form a third light ray 403. At this time, the incident angle of the coherent light 110 is less than 45°. The second light 402 and the third light 403 are located at opposite sides of the first light 401, and the angles formed by the second light 402 and the third light 403 and the first light 401 are equal, and obviously, the angles are acute angles. When the reflector 400 rotates, the reflector 400 can first rotate from the third position 430 to the first position 410, and then rotate from the first position 410 to the second position 420, that is, the reflector 400 rotates counterclockwise; or the reflector 400 can first rotate from the second position 420 to the first position 410, and then rotate from the first position 410 to the third position 430, that is, the reflector 400 rotates clockwise.
[0040] Referring to FIG. 1 , the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 can be arranged along a straight line parallel to the coherent light 110, and the green quantum unit 230 is located between the red quantum unit 210 and the blue quantum unit 220, that is, the green quantum unit 230 is centrally arranged. Of course, the red quantum unit 210 or the blue quantum unit 220 can also be centrally arranged. The green quantum unit 230 receives the first light 401, and the first light 401 will be converted into green incoherent light after passing through the green quantum unit 230. One of the blue quantum unit 220 and the red quantum unit 210 receives the second light 402 and the other receives the third light 403. For example, the blue quantum unit 220 receives the second light 402, and the second light 402 will be converted into blue incoherent light after passing through the blue quantum unit 220; the red quantum unit 210 receives the third light 403, and the third light 403 will be converted into red incoherent light after passing through the red quantum unit 210. Of course, the red quantum unit 210 can receive the second light 402 , and the blue quantum unit 220 can receive the third light 403 .
[0041] Referring to FIG. 1 , the shaping mechanism 300 may be a special optical element. When the light from the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 reaches the shaping mechanism 300, the shaping mechanism 300 will adjust the propagation direction of the red, blue and green incoherent light, so that the incoherent light of the three colors are parallel to each other and have the same transmission direction, thereby making the incoherent light of the three colors reach the imaging element 700 as parallel light for image display.
[0042] Referring to FIG. 2 , for another example, during the rotation process, the reflector 400 can be arranged at an acute angle to the coherent light 110 or at a perpendicular position to the coherent light 110. The reflector 400 can also have a first position 410, a second position 420, and a third position 430. In the first position 410, the reflector 400 is perpendicular to the coherent light 110. At this time, the incident angle of the coherent light 110 is 0°, so that the coherent light 110 can pass through the reflector 400 along the original direction to form a first light ray 401, that is, the reflector 400 forms a transmission effect on the coherent light 110. In the second position 420, the reflector 400 is at an acute angle to the coherent light 110. At this time, the incident angle of the coherent light 110 is 45°, so that the coherent light 110 is reflected by the reflector 400 to form a second light ray 402, and the second light ray 402 is perpendicular to the coherent light 110. At the third position 430, the reflector 400 forms an acute angle with the coherent light 110. At this time, the incident angle of the coherent light 110 is 45°, so that the coherent light 110 forms a third light 403 after being reflected by the reflector 400, and the third light 403 is perpendicular to the coherent light 110. The transmission directions of the second light 402 and the third light 403 are opposite and located in the same straight line, the transmission directions of the first light 401 and the coherent light 110 are the same and located in the same straight line, the second light 402 and the third light 403 are respectively located on opposite sides of the coherent light 110, and the reflector 400 at the second position 420 is perpendicular to the reflector 400 at the first position 410. When the reflector 400 rotates, the reflector 400 can first rotate from the third position 430 to the first position 410, and then rotate from the first position 410 to the second position 420, that is, the reflector 400 rotates clockwise; or the reflector 400 can first rotate from the second position 420 to the first position 410, and then rotate from the first position 410 to the third position 430, that is, the reflector 400 rotates counterclockwise.
[0043] Referring to FIG. 2 , the green quantum unit 230 may be perpendicular to the coherent light 110, and the green quantum unit 230 receives the first light 401, which will be converted into green incoherent light after passing through the green quantum unit 230. The red quantum unit 210 may be parallel to the coherent light 110, and the red quantum unit 210 receives the second light 402, which will be converted into red incoherent light after passing through the red quantum unit 210. The blue quantum unit 220 may be parallel to the coherent light 110, and the blue quantum unit 220 receives the third light 403, which will be converted into blue incoherent light after passing through the blue quantum unit 220. The blue quantum unit 220 and the red quantum unit 210 may be located on opposite sides of the coherent light 110. Of course, the red quantum unit 210 can receive any one of the first light 401, the second light 402 and the third light 403, the green quantum unit 230 can receive any one of the first light 401, the second light 402 and the third light 403, and the blue quantum unit 220 can receive any one of the first light 401, the second light 402 and the third light 403.
[0044] 2 , the laser projection device 10 may further include a first reflector 510, a second reflector 520, a third reflector 530, and a fourth reflector 540. The first reflector 510 and the second reflector 520 are located on one side of the coherent light 110, and the first reflector 510 and the second reflector 520 are arranged at intervals along the transmission direction of the coherent light 110. The third reflector 530 and the fourth reflector 540 are located on the other side of the coherent light 110, and the third reflector 530 and the fourth reflector 540 are arranged at intervals along the transmission direction of the coherent light 110. The first reflector 510 and the fourth reflector 540 are parallel to the reflector 400 located at the second position 420, and the second reflector 520 and the third reflector 530 are parallel to the reflector 400 located at the third position 430. The red incoherent light generated by the red quantum unit 210 of the second light 402 advances along the transmission direction of the second light 402. The red incoherent light is first reflected by the first reflector 510 at an incident angle of 45°. The red incoherent light reflected by the first reflector 510 is parallel to the coherent light 110 and has the same transmission direction as the coherent light 110. The red incoherent light reflected by the first reflector 510 is reflected again by the second reflector 400 at an incident angle of 45°, so that the red incoherent light reflected by the second reflector 400 is parallel to the third light 403 and has the same transmission direction. The blue incoherent light generated by the blue quantum unit 220 of the third light 403 advances along the transmission direction of the third light 403. The blue incoherent light is first reflected by the third reflector 530 at an incident angle of 45°. The blue incoherent light reflected by the third reflector 530 is parallel to the coherent light 110 and has the same transmission direction as the coherent light 110. The blue incoherent light reflected by the third reflector 530 is reflected again by the second reflector 400 at an incident angle of 45°, so that the red incoherent light reflected by the second reflector 400 is parallel to the second light 402 and has the same transmission direction. The green incoherent light generated by the green quantum unit 230 is located in the same straight line as the coherent light 110 and has the same transmission direction.
[0045] 2 , the shaping mechanism 300 may be a special prism light combining element. Through the reflection of the light by the first reflector 510, the second reflector 520, the third reflector 530 and the fourth reflector 540, the light from the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 arrive at the shaping mechanism 300 from different directions respectively. The shaping mechanism 300 will adjust the propagation direction of the red, blue and green incoherent light, so that the incoherent light of the three colors is located in the same straight line and has the same transmission direction, so that the incoherent light of the three colors arrives at the imaging element 700 along the same straight line for image display.
[0046] Referring to FIG. 3 , in some embodiments, the quantum mechanism 200 can move in a straight line perpendicular to the coherent light 110, and the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 are arranged in a straight line perpendicular to the coherent light 110, and the green quantum unit 230 can be arranged in the center. When the quantum mechanism 200 moves in a straight line, the coherent light 110 is transmitted to the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 at different times. For example, when the entire quantum mechanism 200 is located on the upper side of the coherent light 110, the quantum mechanism 200 can be moved downward. During the downward movement of the quantum mechanism 200, the coherent light 110 will first pass through the blue quantum unit 220, then pass through the green quantum unit 230, and finally pass through the red quantum unit 210. For example, when the entire quantum mechanism 200 is located at the lower side of the coherent light 110, the quantum mechanism 200 can be moved upward. During the upward movement of the quantum mechanism 200, the coherent light 110 will first pass through the red quantum unit 210, then through the green quantum unit 230, and finally through the blue quantum unit 220.
[0047] Referring to FIG3 , the shaping mechanism 300 may be a special optical element. When the light from the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 respectively reaches the shaping mechanism 300, the shaping mechanism 300 will adjust the propagation direction of the red, blue and green incoherent light, so that the incoherent light of the three colors is located in the same straight line and has the same transmission direction, thereby making the incoherent light of the three colors arrive at the imaging element 700 along the same straight line for image display.
[0048] Referring to FIG. 3 , the laser projection device 10 may further include an elastic member 600, one end of which is fixedly connected, and the other end of which is connected to the quantum mechanism 200. There may be two elastic members 600, which are respectively located at the two ends of the quantum mechanism 200, and the elastic member 600 may be a spring or the like. By providing the elastic member 600, on the one hand, a buffering effect can be played on the movement of the quantum mechanism 200, and on the other hand, a restoring force can be generated on the quantum mechanism 200 to play a resetting effect.
[0049] 1, 2 and 3, the laser projection device 10 may further include an imaging element 700. When the incoherent light of the shaping mechanism 300 reaches the imaging element 700, the light may be imaged to display an image. Since the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 receive coherent light at different times, the coherent light 110 may be converted into incoherent light under the action of the quantum dot 242, so that the interference of the coherent light 110 on the imaging element 700 may be effectively avoided, thereby reducing the speckle appearing on the imaging element 700, and finally improving the performance of the laser projection device 10 in eliminating speckle.
[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0051] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A laser projection device, characterized in that: include: A laser light source for generating coherent light; A quantum mechanism, used to convert the coherent light into incoherent light, the quantum mechanism comprising a red quantum unit, a blue quantum unit and a green quantum unit for receiving the coherent light at different times, the particle sizes of quantum dots included in the red quantum unit, the blue quantum unit and the green quantum unit are different; A shaping mechanism is used to make the incoherent light from the red quantum unit, the blue quantum unit and the green quantum unit be transmitted in the same direction.
2. The laser projection device according to claim 1, characterized in that: It also includes a reflector, which receives the coherent light and can rotate, and the quantum mechanism is fixed; when the reflector rotates, the reflector transmits the coherent light to the red quantum unit, the blue quantum unit and the green quantum unit respectively at different times.
3. The laser projection device according to claim 2, characterized in that: During the rotation process, the reflector is a plane mirror and is arranged at an acute angle with the coherent light. The reflector reflects the coherent light to form a first light ray at a first position, reflects the coherent light to form a second light ray at a second position, and reflects the coherent light to form a third light ray at a third position. The first light ray is perpendicular to the coherent light, the second light ray and the third light ray are respectively located on opposite sides of the first light ray, and the angles between the second light ray and the third light ray and the first light ray are equal.
4. The laser projection device according to claim 3, characterized in that: The green quantum unit receives the first light, one of the blue quantum unit and the red quantum unit receives the second light, and the other receives the third light.
5. The laser projection device according to claim 2, characterized in that: The red quantum unit, the blue quantum unit and the green quantum unit are arranged along a straight line parallel to the coherent light between the reflector and the laser light source, and the green quantum unit is located between the red quantum unit and the blue quantum unit.
6. The laser projection device according to claim 2, characterized in that: The reflector is a plane mirror. When in the first position, the reflector is perpendicular to the coherent light and transmits the coherent light to form a first light ray; when in the second position, the reflector forms an acute angle with the coherent light and reflects the coherent light to form a second light ray; when in the third position, the reflector forms an acute angle with the coherent light and reflects the coherent light to form a third light ray; the reflector in the second position is perpendicular to the reflector in the third position, the first light ray and the coherent light have the same transmission direction, the second light ray and the third light ray have opposite transmission directions and are perpendicular to the coherent light between the reflector and the laser light source.
7. The laser projection device according to claim 6, characterized in that: The green quantum unit is perpendicular to the coherent light and receives the first light, the red quantum unit and the blue quantum unit are located on opposite sides of the coherent light, one of the red quantum unit and the blue quantum unit receives the second light and the other receives the third light.
8. The laser projection device according to claim 7, characterized in that: It also includes a first reflector, a second reflector, a third reflector and a fourth reflector; the first reflector and the fourth reflector are parallel to the reflector located at the second position, and the second reflector and the third reflector are parallel to the reflector located at the third position; the second light passing through the quantum mechanism is reflected by the first reflector and the second reflector in sequence to form a light parallel to the third light and in the same transmission direction, and the third light passing through the quantum mechanism is reflected by the third reflector and the fourth reflector in sequence to form a light parallel to the second light and in the same transmission direction.
9. The laser projection device according to claim 1, characterized in that: The quantum mechanism can move in a straight line perpendicular to the coherent light, and the red quantum unit, the blue quantum unit and the green quantum unit are arranged along a straight line perpendicular to the coherent light. When the quantum mechanism moves, the coherent light is respectively transmitted to the red quantum unit, the blue quantum unit and the green quantum unit at different times.
10. The laser projection device according to claim 9, characterized in that: It also includes an elastic member, one end of which is fixedly connected, and the other end of which is connected to the quantum mechanism.
11. The laser projection device according to claim 1, characterized in that: Also includes at least one of the following options: When arranged in a straight line, the red quantum unit, the blue quantum unit and the green quantum unit are connected as a whole or spliced with each other; The red quantum unit, the blue quantum unit and the green quantum unit all further include a shell, and the quantum dots are evenly distributed in the shell; The particle size of the quantum dots of the red quantum unit is 2.5nm to 3.5nm, the particle size of the quantum dots of the green quantum unit is 1nm to 2nm, and the particle size of the quantum dots of the blue quantum unit is 0.5nm to 1.5nm; Also included is an imaging element, the imaging element is used to receive light from the shaping mechanism to form an image; The coherent light is a blue laser or an ultraviolet laser; The incoherent light passing through the red quantum unit, the blue quantum unit and the green quantum unit is parallel to each other or located in the same straight line after passing through the shaping mechanism.