Laser projection device

Abstract

To provide a laser projection device with improved speckle eliminating performance.SOLUTION: A laser projection device comprises: a laser light source that generates coherent light; a quantum mechanism that converts the coherent light into incoherent light, that includes a red quantum unit, a blue quantum unit, and a green quantum unit which receive the coherent light at different times, and in which particle sizes of quantum dots included in the red quantum unit, the blue quantum unit, and the green quantum unit are different; and a shaping mechanism that transmits the incoherent light from the red quantum unit, the blue quantum unit, and the green quantum unit in the same direction. 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 using quantum dots. Thus, interference caused by the coherent light is effectively avoided, and speckles on an image formed by the laser projection device are reduced.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to the technical field of laser projection, and in particular to laser projection devices. [Background technology]

[0002] Laser projectors use red, green, and blue primary color lasers as light sources to project images, providing the most realistic reproduction of the rich, lustrous colors of the objective world and delivering a more impactful display. From a colorimetric perspective, laser displays can achieve a color gamut coverage rate of over 90% of the color space discernible by the human eye, more than twice that of conventional displays, allowing people to see the most true, dazzling, and beautiful world through a display device. However, conventional laser projectors are prone to speckle caused by interference, and the presence of speckle ultimately affects the imaging performance of the laser projector. Summary of the Invention [Problem to be solved by the invention]

[0003] One technical problem that the present application aims to solve is how to improve the speckle removal performance of a laser projection device. [Means for solving the problem]

[0004] The laser projection device a laser light source that generates coherent light; a quantum mechanism for converting the coherent light into incoherent light, the quantum mechanism including a red quantum unit, a blue quantum unit, and a green quantum unit that receive the coherent light at different times, wherein the quantum dots included in the red quantum unit, the blue quantum unit, and the green quantum unit have different particle sizes; a shaping mechanism that causes the incoherent light from the red quantum unit, the blue quantum unit, and the green quantum unit to be transmitted along the same direction.

[0005] In one embodiment, the quantum mechanism further includes a rotatable reflector that receives the coherent light, and the reflector rotates to transmit the coherent light to the red quantum unit, the blue quantum unit, and the green quantum unit, respectively, at different times.

[0006] In one embodiment, during the rotation process, the reflecting mirror is a plane mirror and is installed to form an acute angle with the coherent light, the reflecting mirror reflects the coherent light at a first position to form a first light ray, reflects the coherent light at a second position to form a second light ray, and reflects the coherent light at a third position to form a third light ray, the first light ray is perpendicular to the coherent light, the second light ray and the third light ray are respectively opposite to the first light ray, and the angle between the second light ray and the first light ray and the angle between the third light ray and the first light ray are equal.

[0007] In one embodiment, the green quantum unit receives the first light beam, one of the blue quantum unit and the red quantum unit receives the second light beam, and the other receives the third light beam.

[0008] 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 between the red quantum unit and the blue quantum unit.

[0009] In one embodiment, the reflecting mirror is a plane mirror, and when in a first position, the reflecting mirror is perpendicular to the coherent light and transmits the coherent light to form a first light beam; when in a second position, the reflecting mirror forms an acute angle with the coherent light and reflects the coherent light to form a second light beam; and when in a third position, the reflecting mirror forms an acute angle with the coherent light and reflects the coherent light to form a third light beam; when in the second position, the reflecting mirror is perpendicular to the reflecting mirror when in the third position; the transmission direction of the first light beam and the transmission direction of the coherent light are the same; and the transmission direction of the second light beam and the transmission direction of the third light beam are opposite and perpendicular to the transmission direction of the coherent light between the reflecting mirror and the laser light source.

[0010] In one embodiment, the green quantum unit is perpendicular to the coherent light and receives the first light ray, the red quantum unit and the blue quantum unit are on opposite sides of the coherent light, one of the red quantum unit and the blue quantum unit receives the second light ray and the other receives the third light ray.

[0011] In one embodiment, the system further includes a first convex mirror, a second convex mirror, a third convex mirror, and a fourth convex mirror, wherein the first convex mirror and the fourth convex mirror are parallel to the reflecting mirror when in the second position, and the second convex mirror and the third convex mirror are parallel to the reflecting mirror when in the third position, and the second light ray passing through the quantum mechanism is reflected by the first convex mirror and the second convex mirror in order to form a light ray that is parallel to the third light ray and has the same propagation direction as the third light ray, and the third light ray passing through the quantum mechanism is reflected by the third convex mirror and the fourth convex mirror in order to form a light ray that is parallel to the second light ray and has the same propagation direction as the third light ray.

[0012] In one embodiment, the quantum mechanism is capable of linear movement perpendicular to the coherent light, and the red quantum unit, the blue quantum unit, and the green quantum unit are arranged along a line perpendicular to the coherent light, and when the quantum mechanism moves, the coherent light is transmitted to the red quantum unit, the blue quantum unit, and the green quantum unit, respectively, at different times.

[0013] In one embodiment, the device further includes a resilient member having one end fixedly connected and the other end connected to the quantum mechanism.

[0014] In one embodiment, the red quantum unit, the blue quantum unit, and the green quantum unit are integrally connected or joined to each other when arranged along a straight line; the red quantum unit, the blue quantum unit, and the green quantum unit each further include a case, and the quantum dots are uniformly distributed within the case; the quantum dots of the red quantum unit have a particle size of 2.5 nm to 3.5 nm, the quantum dots of the green quantum unit have a particle size of 1 nm to 2 nm, and the quantum dots of the blue quantum unit have a particle size of 0.5 nm to 1.5 nm; further including an imaging element that receives the light beam from the shaping mechanism and forms an image; the coherent light is a blue laser or an ultraviolet laser; and The incoherent light passing through the red quantum unit, the blue quantum unit, and the green quantum unit may further include at least one of becoming parallel to each other or being in the same straight line after passing through the shaping mechanism.

[0015] One technical effect of one embodiment of the present application is that the red quantum unit, the blue quantum unit, and the green quantum unit receive coherent light at different times, and the coherent light is converted into incoherent light through the action of quantum dots, thereby effectively avoiding interference caused by coherent light and reducing speckle on the image formed by the laser projection device, and ultimately improving the speckle removal performance of the laser projection device. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic plan view of a laser projection device according to an embodiment; [Figure 2] FIG. 10 is a schematic plan view of the configuration of a laser projection device according to another embodiment. [Figure 3] FIG. 10 is a schematic plan view of the configuration of a laser projection device according to yet another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] In order to make the above-mentioned objects, features, and advantages of the present application more clearly understandable, specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details will be described in order to facilitate a thorough understanding of the present application. However, the present application can be implemented in many ways other than those described in this specification, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific examples disclosed below.

[0018] In addition, when the terms "center," "longitudinal direction," "lateral direction," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," etc. are used in the description of this application, the orientations or positional relationships indicated by these terms are based on the orientations or positional relationships shown in the drawings, and are intended only to facilitate and simplify the description of this application. They do not indicate or suggest that the illustrated devices or elements must have a specific orientation and be configured and operate in a specific orientation, and therefore should not be understood as limiting this application.

[0019] Furthermore, when the terms "first" and "second" are used, these terms are used for descriptive purposes only and should not be understood to indicate or imply the relative importance or quantity of the indicated technical features. Thus, a feature qualified by "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of this application, when the term "plurality" is used, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically limited.

[0020] In this application, unless otherwise clearly specified or limited, when the terms "attached," "coupled," "connected," "fixed," etc. are used, these terms should be understood in a broad sense. For example, they may refer to a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection via an intermediate medium, and, unless otherwise clearly limited, may refer to a communication between two elements or an interaction between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to the specific circumstances.

[0021] In this application, unless otherwise expressly specified or limited, when a first feature is described as being "above" or "below" a second feature or similar, this means that the first feature and the second feature are in direct contact with each other, or that the first feature and the second feature are in indirect contact with each other via an intermediate medium. Furthermore, when a first feature is "above," "above," or "on the upper surface" of a second feature, this means that the first feature is directly above or diagonally above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "below," "below," or "on the lower surface" of a second feature, this means that the first feature is directly below or diagonally below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature.

[0022] It should be noted that when an element is referred to as being "fixed" or "mounted" to another element, it may be directly connected to the other element, or there may be additional elements between them. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or there may also be additional elements between them. When present, the terms "vertical," "horizontal," "top," "bottom," "left," "right," and similar terms used herein are for illustrative purposes only and do not represent the only embodiment.

[0023] Referring to FIG. 1 , a laser projection device 10 according to an embodiment of the present application includes a laser light source 100, a quantum mechanism 200, and a shaping mechanism 300. The laser light source 100 generates coherent light 110, the quantum mechanism 200 converts the coherent light 110 into incoherent light, and the shaping mechanism 300 combines the incoherent light from the quantum mechanism 200 so that the incoherent light is transmitted in the same direction. The incoherent light from the shaping mechanism 300 may be received by an imaging element 700 to display an image. Considering that the light beam passing through the quantum mechanism 200 is incoherent light, interference caused by the coherent light 110 can be effectively avoided, and speckle appearing on the imaging element 700 can be reduced, ultimately improving the speckle removal performance of the laser projection device 10.

[0024] 1 , in some embodiments, a laser light source 100 generates coherent light 110, which may be a blue laser or an ultraviolet laser, etc. A quantum mechanism 200 includes a red quantum unit 210, a blue quantum unit 220, and a green quantum unit 230, each of which may be flat. For example, the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 may be arranged along a line and joined or integrally connected to each other. Furthermore, for example, the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 may not be arranged along a line and may be discretely positioned at different positions.

[0025] Referring to FIG. 1 , the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 may each include a case 241 and particulate quantum dots 242. The quantum dots 242 may be uniformly distributed within the case 241, with the case 241 serving as a carrier for the quantum dots 242. The case 241 may be made of a glass material and have high temperature resistance. The quantum dots 242 within the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 have different particle sizes, which may be understood as the diameter of the quantum dots 242. The particle size of the quantum dots 242 in the red quantum unit 210 is 2.5 nm to 3.5 nm. For example, the particle size of the quantum dots 242 in the red quantum unit 210 may be specifically 3 nm. Due to the action of the quantum dots 242, the coherent light 110 passing through the red quantum unit 210 can be converted into red incoherent light with a half-wavelength of 30 nm or less. The quantum dots 242 in the green quantum unit 230 have a particle size of 1.5 nm to 2 nm. For example, the particle size of the quantum dots 242 in the green quantum unit 230 may be specifically 1.5 nm. The quantum dots 242 can convert the coherent light 110 passing through the green quantum unit 230 into green incoherent light with a half-wavelength of 30 nm or less. The quantum dots 242 in the blue quantum unit 220 have a particle size of 1.5 nm to 2 nm. For example, the particle size of the quantum dots 242 in the green quantum unit 230 may be specifically 1 nm. The quantum dots 242 can convert the coherent light 110 passing through the blue quantum unit 220 into blue incoherent light with a half-wavelength of 30 nm or less. The small half-wavelength can rationally increase the color gamut of the incoherent light, thereby improving the clarity and fidelity of the image formed by the laser projection device 10.

[0026] 1 , in some embodiments, the laser projection device 10 may further include a reflecting mirror 400, which may be a flat mirror that is rotatable around a fixed axis. In contrast, the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 are fixed and do not move. When the reflecting mirror 400 rotates to different positions, it 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 reflecting mirror 400 can be achieved by a stepping motor, which can improve the rotation accuracy of the reflecting mirror 400.

[0027] 1 , for example, during the rotation process, the reflecting mirror 400 is installed to form an acute angle with the coherent light 110, and may have a first position 410, a second position 420, and a third position 430. When the reflecting mirror 400 is at the first position 410, the coherent light 110 is reflected by the reflecting mirror 400 to form a first light ray 401, which is perpendicular to the coherent light 110, and the incident angle of the coherent light 110 is 45°. When the reflecting mirror 400 is at the second position 420, the coherent light 110 is reflected by the reflecting mirror 400 to form a second light ray 402, and the incident angle of the coherent light 110 is greater than 45°. When the reflecting mirror 400 is at the third position 430, the coherent light 110 is reflected by the reflecting mirror 400 to form a third light ray 403, and the incident angle of the coherent light 110 is less than 45°. The second light ray 402 and the third light ray 403 are respectively opposite to the first light ray 401, and the angle between the second light ray 402 and the first light ray 401 and the angle between the third light ray 403 and the first light ray 401 are equal, and obviously, the angles are acute angles. When the reflector 400 rotates, the reflector 400 may 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, i.e., rotate counterclockwise, or the reflector 400 may 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, i.e., rotate clockwise.

[0028] 1 , the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 may 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, i.e., the green quantum unit 230 is located in the center. Of course, the red quantum unit 210 or the blue quantum unit 220 may also be located in the center. The green quantum unit 230 receives a first light ray 401, and the first light ray 401 is 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 ray 402, and the other receives the third light ray 403, for example, the blue quantum unit 220 receives the second light ray 402, which is converted into blue incoherent light after passing through the blue quantum unit 220, and the red quantum unit 210 receives the third light ray 403, which is converted into red incoherent light after passing through the red quantum unit 210. Of course, the red quantum unit 210 may receive the second light ray 402, and the blue quantum unit 220 may receive the third light ray 403.

[0029] Referring to FIG. 1, the shaping mechanism 300 may be a special optical element, and when the light beams from the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 reach the shaping mechanism 300, the shaping mechanism 300 adjusts the propagation direction of the red, blue and green incoherent light, so that the three colors of incoherent light are parallel to each other and have the same transmission direction, and the three colors of incoherent light reach the imaging element 700 as parallel light to display an image.

[0030] 2 , for example, during the rotation process, the reflecting mirror 400 may be positioned to form an acute angle with the coherent light 110 or to be perpendicular to the coherent light 110. Similarly, the reflecting mirror 400 may have a first position 410, a second position 420, and a third position 430. When the reflecting mirror 400 is positioned at the first position 410, the reflecting mirror 400 is perpendicular to the coherent light 110. In this case, the incident angle of the coherent light 110 is 0°, so that the coherent light 110 can pass through the reflecting mirror 400 along the original direction to form a first light ray 401. That is, the reflecting mirror 400 performs a transmitting function on the coherent light 110. When in the second position 420, the reflecting mirror 400 forms an acute angle with the coherent light 110, and in this case, the incident angle of the coherent light 110 is 45°, so the coherent light 110 is reflected by the reflecting mirror 400 to form a second light ray 402, and the second light ray 402 and the coherent light 110 are perpendicular to each other. When in the third position 430, the reflecting mirror 400 forms an acute angle with the coherent light 110, and in this case, the incident angle of the coherent light 110 is 45°, so the coherent light 110 is reflected by the reflecting mirror 400 to form a third light ray 403, and the third light ray 403 and the coherent light 110 are perpendicular to each other. The propagation direction of the second light beam 402 and the propagation direction of the third light beam 403 are opposite and on the same straight line, the propagation direction of the first light beam 401 and the propagation direction of the coherent light 110 are the same and on the same straight line, the second light beam 402 and the third light beam 403 are respectively on opposite sides of the coherent light 110, and the reflecting mirror 400 at the second position 420 and the reflecting mirror 400 at the first position 410 are perpendicular to each other. When the reflecting mirror 400 rotates, the reflecting mirror 400 may 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, i.e., rotate clockwise, or the reflecting mirror 400 may 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, i.e., rotate counterclockwise.

[0031] 2 , the green quantum unit 230 may be perpendicular to the coherent light 110, and the green quantum unit 230 receives a first light ray 401, which is 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 a second light ray 402, which is 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 a third light ray 403, which is 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 on opposite sides of the coherent light 110. Of course, the red quantum unit 210 may receive any one of the first light ray 401, the second light ray 402, and the third light ray 403, the green quantum unit 230 may receive any one of the first light ray 401, the second light ray 402, and the third light ray 403, and the blue quantum unit 220 may receive any one of the first light ray 401, the second light ray 402, and the third light ray 403.

[0032] 2, the laser projection device 10 may further include a first convex mirror 510, a second convex mirror 520, a third convex mirror 530, and a fourth convex mirror 540. The first convex mirror 510 and the second convex mirror 520 are located on one side of the coherent light 110, and are spaced apart from each other along the transmission direction of the coherent light 110. The third convex mirror 530 and the fourth convex mirror 540 are located on the other side of the coherent light 110, and are spaced apart from each other along the transmission direction of the coherent light 110. The first convex mirror 510 and the fourth convex mirror 540 are parallel to the reflecting mirror 400 when in the second position 420, and the second convex mirror 520 and the third convex mirror 530 are parallel to the reflecting mirror 400 when in the third position 430. The red incoherent light generated by the second light ray 402 passing through the red quantum unit 210 travels along the transmission direction of the second light ray 402. The red incoherent light is first reflected by the first convex mirror 510 at an incident angle of 45°. The red incoherent light reflected by the first convex mirror 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 convex mirror 510 is again reflected by the second convex mirror 520 at an incident angle of 45°. Thus, the red incoherent light reflected by the second convex mirror 520 is parallel to the third light ray 403 and has the same transmission direction. The blue incoherent light generated by the third light ray 403 passing through the blue quantum unit 220 travels along the propagation direction of the third light ray 403. The blue incoherent light is first reflected by the third convex mirror 530 at an incident angle of 45°. The blue incoherent light reflected by the third convex mirror 530 is parallel to the coherent light 110 and has the same propagation direction as the coherent light 110. The blue incoherent light reflected by the third convex mirror 530 is again reflected by the fourth convex mirror 540 at an incident angle of 45°. Thus, the blue incoherent light reflected by the fourth convex mirror 540 is parallel to the second light ray 402 and has the same propagation direction. The green incoherent light generated by the green quantum unit 230 is on the same straight line as the coherent light 110 and has the same propagation direction.

[0033] Referring to FIG. 2, the shaping mechanism 300 may be a special prism light combining element, and the first convex mirror 510, the second convex mirror 520, the third convex mirror 530, and the fourth convex mirror 540 reflect the light beams, so that the light beams from the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 reach the shaping mechanism 300 from different directions. The shaping mechanism 300 adjusts the propagation directions of the red, blue, and green incoherent light beams so that the three incoherent light beams are on the same straight line and have the same transmission direction, and the three incoherent light beams reach the imaging element 700 along the same straight line to display an image.

[0034] 3 , in some embodiments, quantum mechanism 200 may be movable linearly perpendicular to the coherent light 110, with red quantum unit 210, blue quantum unit 220, and green quantum unit 230 arranged along a line perpendicular to the coherent light 110, and green quantum unit 230 located in the middle. When quantum mechanism 200 moves linearly, coherent light 110 is transmitted to red quantum unit 210, blue quantum unit 220, and green quantum unit 230 at different times. For example, when the entire quantum mechanism 200 is above the coherent light 110, quantum mechanism 200 may be moved downward. During the downward movement of quantum mechanism 200, coherent light 110 first passes through blue quantum unit 220, then through green quantum unit 230, and finally through red quantum unit 210. Also, for example, when the entire quantum mechanism 200 is below the coherent light 110, the quantum mechanism 200 may be moved upward, and in the process of the quantum mechanism 200 moving upward, the coherent light 110 first passes through the red quantum unit 210, then through the green quantum unit 230, and finally through the blue quantum unit 220.

[0035] Referring to FIG. 3, the shaping mechanism 300 may be a special optical element, and when the light beams from the red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 reach the shaping mechanism 300 respectively, the shaping mechanism 300 adjusts the propagation direction of the red, blue and green incoherent light so that the three colors of incoherent light are on the same straight line and have the same transmission direction, and the three colors of incoherent light reach the imaging element 700 along the same straight line to display an image.

[0036] 3, the laser projection device 10 may further include an elastic member 600 having one end fixedly connected and the other end connected to the quantum mechanism 200. The number of elastic members 600 may be two, and the two elastic members 600 may be located at both ends of the quantum mechanism 200, respectively. The elastic members 600 may be springs or the like. By providing the elastic members 600, a buffer effect can be achieved against the movement of the quantum mechanism 200, and a restoring force can be generated in the quantum mechanism 200 to achieve a restoring effect.

[0037] 1, 2 and 3, the laser projection device 10 may further include a focusing element 700. When the incoherent light beam from the shaping mechanism 300 reaches the focusing element 700, the focusing element 700 can focus the light beam to display an image. The red quantum unit 210, the blue quantum unit 220 and the green quantum unit 230 receive coherent light at different times, and the quantum dots 242 can convert the coherent light 110 into incoherent light. This can effectively prevent the coherent light 110 from interfering with the focusing element 700, reduce speckles appearing on the focusing element 700, and ultimately improve the speckle removal performance of the laser projection device 10.

[0038] The technical features of the above-described embodiments can be combined in any manner, and for the sake of convenience, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it is considered that they should fall within the scope described in this specification.

[0039] The above examples merely illustrate some embodiments of the present application, and although the descriptions are specific and detailed, they should not be construed as limiting the scope of the claims of the present application. It should be noted that those skilled in the art may make further modifications and alterations without departing from the concept of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be determined based on the scope of the appended claims. [Explanation of symbols]

[0040] 10 laser projection device, 100 laser light source, 110 coherent light, 200 quantum mechanism, 210 red quantum unit, 220 blue quantum unit, 230 green quantum unit, 241 case, 242 quantum dot, 300 shaping mechanism, 400 reflecting mirror, 410 first position, 420 second position, 430 third position, 401 first light ray, 402 second light ray, 403 third light ray, 510 first convex mirror, 520 second convex mirror, 530 third convex mirror, 540 fourth convex mirror, 600 elastic member, 700 imaging element

Claims

1. a laser light source that generates coherent light; a quantum mechanism for converting the coherent light into incoherent light, the quantum mechanism including a red quantum unit, a blue quantum unit, and a green quantum unit that receive the coherent light at different times, wherein the quantum dots included in the red quantum unit, the blue quantum unit, and the green quantum unit have different particle sizes; a shaping mechanism that causes the incoherent light from the red quantum unit, the blue quantum unit, and the green quantum unit to be transmitted along the same direction; 1. A laser projection device comprising:

2. 2. The laser projection device of claim 1, further comprising a rotatable reflecting mirror that receives the coherent light, wherein the quantum mechanism is fixed, and the reflecting mirror transmits the coherent light to the red quantum unit, the blue quantum unit, and the green quantum unit at different times when rotated.

3. 3. The laser projection device of claim 2, wherein during the rotation, the reflecting mirror is a plane mirror and is installed to form an acute angle with the coherent light, the reflecting mirror reflects the coherent light at a first position to form a first light beam, at a second position to form a second light beam, and at a third position to form a third light beam, the first light beam is perpendicular to the coherent light, the second light beam and the third light beam are respectively opposite to the first light beam, and an angle between the second light beam and the first light beam and an angle between the third light beam and the first light beam are equal.

4. 4. The laser projection device of claim 3, wherein the green quantum unit receives the first light beam, one of the blue quantum unit and the red quantum unit receives the second light beam, and the other receives the third light beam.

5. 3. The laser projection device of claim 2, wherein 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. 3. The laser projection device of claim 2, wherein the reflecting mirror is a plane mirror, and when in a first position, the reflecting mirror is perpendicular to the coherent light and transmits the coherent light to form a first light beam; when in a second position, the reflecting mirror forms an acute angle with the coherent light and reflects the coherent light to form a second light beam; and when in a third position, the reflecting mirror forms an acute angle with the coherent light and reflects the coherent light to form a third light beam; the reflecting mirror when in the second position is perpendicular to the reflecting mirror when in the third position; a transmission direction of the first light beam and a transmission direction of the coherent light are the same; and a transmission direction of the second light beam and a transmission direction of the third light beam are opposite and perpendicular to a transmission direction of the coherent light between the reflecting mirror and the laser light source.

7. 7. The laser projection device of claim 6, wherein the green quantum unit is perpendicular to the coherent light and receives the first light beam, and the red and blue quantum units are on opposite sides of the coherent light, one of the red and blue quantum units receives the second light beam and the other receives the third light beam.

8. 8. The laser projection device of claim 7, further comprising a first convex mirror, a second convex mirror, a third convex mirror, and a fourth convex mirror, wherein the first convex mirror and the fourth convex mirror are parallel to the reflecting mirror when in the second position, and the second convex mirror and the third convex mirror are parallel to the reflecting mirror when in the third position, the second light ray passing through the quantum mechanism is reflected by the first convex mirror and the second convex mirror in order to form a light ray that is parallel to the third light ray and has the same propagation direction as the third light ray, and the third light ray passing through the quantum mechanism is reflected by the third convex mirror and the fourth convex mirror in order to form a light ray that is parallel to the second light ray and has the same propagation direction as the second light ray.

9. 2. The laser projection device of claim 1, wherein the quantum mechanism is capable of linear movement perpendicular to the coherent light, the red quantum unit, the blue quantum unit, and the green quantum unit are arranged along a straight line perpendicular to the coherent light, and when the quantum mechanism moves, the coherent light is transmitted to the red quantum unit, the blue quantum unit, and the green quantum unit, respectively, at different times.

10. 10. The laser projection device of claim 9, further comprising a resilient member having one end fixedly connected and the other end connected to the quantum mechanism.

11. the red quantum unit, the blue quantum unit, and the green quantum unit are integrally connected or joined to each other when arranged along a straight line; the red quantum unit, the blue quantum unit, and the green quantum unit each further include a case, and the quantum dots are uniformly distributed within the case; the quantum dots of the red quantum unit have a particle size of 2.5 nm to 3.5 nm, the quantum dots of the green quantum unit have a particle size of 1 nm to 2 nm, and the quantum dots of the blue quantum unit have a particle size of 0.5 nm to 1.5 nm; further including an imaging element that receives the light beam from the shaping mechanism and forms an image; the coherent light is a blue laser or an ultraviolet laser; and the incoherent light passing through the red quantum unit, the blue quantum unit, and the green quantum unit becomes parallel to each other or is on the same straight line after passing through the shaping mechanism; 2. The laser projection device according to claim 1, characterized in that:

Images