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] This application relates to the technical field of laser projection, and particularly to a laser projection device.

Background Art

[0002] A laser projection device projects using red, green, and blue primary color lasers as light sources, and can most realistically reproduce the rich and vivid colors of the objective world and provide a more impactful expressiveness. From the perspective of colorimetry, laser display can achieve a color gamut coverage rate of over 90% of the color space that the human eye can distinguish, which is more than twice that of conventional displays, enabling people to see the most realistic, magnificent, and beautiful world through display terminals. However, in conventional laser projection devices, speckles are likely to occur due to interference, and the presence of speckles ultimately affects the imaging effect of the laser projection device.

Summary of the Invention

Problems to be Solved by the Invention

[0003] One technical problem to be solved by this application is how to improve the removal performance of the laser projection device for speckles.

Means for Solving the Problems

[0004] The laser projection device includes a laser light source that generates coherent light, a quantum mechanism that converts the coherent light into incoherent light, including a red quantum unit, a blue quantum unit, and a green quantum unit that receive the coherent light at different times, and the particle sizes of the quantum dots included in the red quantum unit, the blue quantum unit, and the green quantum unit are different, and a shaping mechanism that enables 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 mirror that receives the coherent light, the quantum mechanism being fixed, and the mirror, when rotated, transmits 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 reflector is a plane mirror and is positioned at an acute angle with the coherent light, the reflector reflects the coherent light at a first position to form a first ray, at a second position to form a second ray, and at a third position to form a third ray, the first ray is perpendicular to the coherent light, the second ray and the third ray are on opposite sides of the first ray, and the angle between the second ray and the first ray is equal to the angle between the third ray and the first ray.

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

[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 reflecting mirror and the laser light source, with the green quantum unit located between the red quantum unit and the blue quantum unit.

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

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

[0011] In one embodiment, the quantum mechanism further includes a first convex mirror, a second convex mirror, a third convex mirror, and a fourth convex mirror, wherein the first and fourth convex mirrors are parallel to the reflecting mirror when in a second position, and the second and third convex mirrors are parallel to the reflecting mirror when in a third position, and the second ray that has passed through the quantum mechanism is reflected by the first and second convex mirrors in succession to form a ray that is parallel to the third ray and has the same transmission direction, and the third ray that has passed through the quantum mechanism is reflected by the third and fourth convex mirrors in succession to form a ray that is parallel to the second ray and has the same transmission direction.

[0012] In one embodiment, the quantum mechanism is capable of linear motion 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, and as 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 present invention further includes an elastic member to which one end is fixedly connected and the other end is connected to the quantum mechanism.

[0014] In one embodiment, The red quantum unit, the blue quantum unit, and the green quantum unit are connected integrally 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 particle size of the quantum dots in the red quantum unit is 2.5 nm to 3.5 nm, the particle size of the quantum dots in the green quantum unit is 1 nm to 2 nm, and the particle size of the quantum dots in the blue quantum unit is 0.5 nm to 1.5 nm. The imaging element further includes an imaging element that receives light rays from the shaping mechanism and forms an image. The coherent light is a blue laser or an ultraviolet laser, and The incoherent light that has passed through the red quantum unit, the blue quantum unit, and the green quantum unit is parallel to each other or in the same straight line after passing through the shaping mechanism, further comprising at least one of these.

[0015] One technical effect of one embodiment of the present invention is that, in view of the red quantum unit, blue quantum unit, and green quantum unit receiving coherent light at different times and converting the coherent light to incoherent light through the action of quantum dots, interference by coherent light can be effectively avoided, speckles on the image formed by the laser projection device can be reduced, and ultimately the speckle removal performance of the laser projection device can be improved. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic plan view of a laser projection device according to one embodiment. [Figure 2] This is a schematic plan view of a laser projection device according to another embodiment. [Figure 3] This is a schematic plan view of a laser projection device according to another embodiment. [Modes for carrying out the invention]

[0017] To make the above-mentioned objectives, features, and advantages of the present application easier to understand, specific embodiments of the present application will be described in detail below with reference to the drawings. The following description will provide many specific details to make the present application easier to understand. However, the present application can be implemented in many ways other than those described herein, and a person 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 embodiments disclosed below.

[0018] In the description of the present application, when terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction" are described, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of easily explaining the present application and simplifying the description. It does not indicate or imply that the shown device or element must have a specific orientation and be configured and operate in a specific orientation, so it should not be understood as limiting the present application.

[0019] Furthermore, when terms "first" and "second" are described, these terms are used only for the purpose of explanation, and should not be understood as indicating or implying relative importance, or implying the quantity of the indicated technical features. Thus, the features limited by "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, when the term "plurality" is described, "plurality" means at least two, for example, two, three, etc., unless there is a clear and specific limitation.

[0020] In the present application, unless there are clear regulations and limitations, when terms such as "mounting", "connecting", "connecting", "fixing", etc. are described, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and may also be a communication between two elements or an interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

[0021] In this application, unless there are clear regulations and limitations, when descriptions similar to "above" or "below" of the second feature are described for the first feature, their meanings may be that the first feature and the second feature are in direct contact, or the first feature and the second feature are in indirect contact through an intermediate medium. Also, when the first feature is "above", "upward" or "upper surface" of the second feature, it may mean that the first feature is directly above and obliquely above the second feature, or it may simply mean that the horizontal height of the first feature is higher than that of the second feature. When the first feature is "below", "downward" or "lower surface" of the second feature, it may mean that the first feature is directly below and obliquely below the second feature, or it may simply mean that the horizontal height of the first feature is lower than that of the second feature.

[0022] In addition, when an element is referred to as being "fixed to" or "installed on" another element, it may be directly on the other element, or there may be other elements between them. When one element is considered to be "connected to" another element, it may be directly connected to the other element, or there may be other elements existing between them at the same time. If they exist, the terms "vertical", "horizontal", "above", "below", "left", "right" and similar expressions used in this specification are for illustrative purposes only and do not represent the only embodiment.

[0023] Referring to Figure 1, a laser projection apparatus 10 according to one embodiment of the present invention 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 integrates 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. In view of the fact that the light rays that have passed through the quantum mechanism 200 are incoherent light, in this way interference by the coherent light 110 can be effectively avoided, speckles appearing on the imaging element 700 can be reduced, and ultimately the speckle removal performance of the laser projection apparatus 10 can be improved.

[0024] Referring to Figure 1, in some embodiments, the laser light source 100 generates coherent light 110, which may 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, blue quantum unit 220, and green quantum unit 230 may all be in the shape of flat plates. For example, the three red quantum unit 210, blue quantum unit 220, and green quantum unit 230 may be arranged along a straight line so that they are joined to each other or connected integrally. Alternatively, for example, the three red quantum unit 210, blue quantum unit 220, and green quantum unit 230 do not have to be arranged along a straight line so that they are discrete and in different positions.

[0025] Referring to Figure 1, the three quantum units, 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, and the quantum dots 242 may be uniformly distributed within the case 241, with the case 241 acting as a carrier for the quantum dots 242. The case 241 may be made of glass material and have high temperature resistance. The quantum dots 242 inside the three quantum units, the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230, have different particle sizes, and the particle size may be understood as the diameter of the quantum dot 242. The particle size of the quantum dots 242 in the red quantum unit 210 is 2.5 nm to 3.5 nm, and for example, the particle size of the quantum dots 242 in the red quantum unit 210 may specifically be 3 nm, and due to the action of the quantum dots 242, the coherent light 110 that has passed through the red quantum unit 210 can be converted into red incoherent light with a half-wavelength width of 30 nm or less. The particle size of the quantum dots 242 in the green quantum unit 230 is 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. Due to the action of the quantum dots 242, the coherent light 110 that has passed through the green quantum unit 230 can be converted into green incoherent light with a half-wavelength of 30 nm or less. The particle size of the quantum dots 242 in the blue quantum unit 220 is 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. Due to the action of the quantum dots 242, the coherent light 110 that has passed through the blue quantum unit 220 can be converted into blue incoherent light with a half-wavelength of 30 nm or less. Because the half-wavelength is small, the clarity and fidelity of the image formed by the laser projection device 10 can be improved by rationally improving the color gamut of the incoherent light in this way.

[0026] Referring to Figure 1, in some embodiments, the laser projection device 10 may further include a reflector 400, which may be a flat, planar mirror, and which is rotatable about 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, and when the reflector 400 rotates to different positions, it transmits coherent light 110 to the red quantum unit 210, the blue quantum unit 220, and the green quantum unit 230 at different times, respectively. By realizing the rotation of the reflector 400 with a stepping motor, the rotational accuracy of the reflector 400 can be improved.

[0027] Referring to Figure 1, for example, during the rotation process, the reflector 400 may be positioned at 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 reflector 400 is in the first position 410, the coherent light 110 is reflected by the reflector 400 to form a first ray 401, which is perpendicular to the coherent light 110, and in this case the angle of incidence of the coherent light 110 is 45°. When the reflector 400 is in the second position 420, the coherent light 110 is reflected by the reflector 400 to form a second ray 402, and in this case the angle of incidence of the coherent light 110 is greater than 45°. When the reflector 400 is in the third position 430, the coherent light 110 is reflected by the reflector 400 to form a third ray 403, in which case the angle of incidence of the coherent light 110 is less than 45°. The second ray 402 and the third ray 403 are on opposite sides of the first ray 401, and the angle between the second ray 402 and the first ray 401 is equal to the angle between the third ray 403 and the first ray 401, and these angles are clearly acute. When the reflector 400 rotates, it may first rotate from the third position 430 to the first position 410, and then from the first position 410 to the second position 420, that is, it may rotate counterclockwise, or the reflector 400 may first rotate from the second position 420 to the first position 410, and then from the first position 410 to the third position 430, that is, it may rotate clockwise.

[0028] Referring to Figure 1, the three units, 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, with the green quantum unit 230 located between the red quantum unit 210 and the blue quantum unit 220, i.e., the green quantum unit 230 being placed in the center. Of course, either the red quantum unit 210 or the blue quantum unit 220 may be placed in the center. The green quantum unit 230 receives the first ray 401, and after passing through the green quantum unit 230, the first ray 401 is converted into green incoherent light. One of the blue quantum unit 220 and the red quantum unit 210 receives the second ray 402, and the other receives the third ray 403. For example, the blue quantum unit 220 receives the second 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 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 also receive the second ray 402, and the blue quantum unit 220 may also receive the third ray 403.

[0029] Referring to Figure 1, the shaping mechanism 300 may be a specially made optical element. When light rays 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 become parallel to each other and have the same transmission direction. As a result, the three colors of incoherent light reach the imaging element 700 as parallel light and display an image.

[0030] Referring to Figure 2, for example, during the rotation process, the reflector 400 may be positioned at an acute angle with the coherent light 110, or it may be positioned perpendicular to the coherent light 110. Similarly, the reflector 400 may have a first position 410, a second position 420, and a third position 430. When in the first position 410, the reflector 400 is perpendicular to the coherent light 110, and in this case, the angle of incidence of the coherent light 110 is 0°, so the coherent light 110 can pass through the reflector 400 along its original direction to form the first ray 401, that is, the reflector 400 performs a transmitting effect on the coherent light 110. When in the second position 420, the reflector 400 forms an acute angle with the coherent light 110, and in this case the angle of incidence of the coherent light 110 is 45°, so the coherent light 110 is reflected by the reflector 400 to form a second ray 402, and the second ray 402 and the coherent light 110 are perpendicular to each other. When in the third position 430, the reflector 400 forms an acute angle with the coherent light 110, and in this case the angle of incidence of the coherent light 110 is 45°, so the coherent light 110 is reflected by the reflector 400 to form a third ray 403, and the third ray 403 and the coherent light 110 are perpendicular to each other. The transmission directions of the second ray 402 and the third ray 403 are opposite and lie on the same straight line, the transmission direction of the first ray 401 and the transmission direction of the coherent light 110 are the same and lie on the same straight line, the second ray 402 and the third ray 403 are on opposite sides of the coherent light 110, the reflector 400 when in the second position 420 and the reflector 400 when in the first position 410 are perpendicular to each other. When the reflector 400 rotates, it may first rotate from the third position 430 to the first position 410, and then from the first position 410 to the second position 420, i.e., rotate clockwise, or the reflector 400 may first rotate from the second position 420 to the first position 410, and then from the first position 410 to the third position 430, i.e., rotate counterclockwise.

[0031] Referring to Figure 2, the green quantum unit 230 may be perpendicular to the coherent light 110, and the green quantum unit 230 receives the first 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 the second 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 the third 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 ray 401, the second ray 402, and the third ray 403; the green quantum unit 230 may receive any one of the first ray 401, the second ray 402, and the third ray 403; and the blue quantum unit 220 may receive any one of the first ray 401, the second ray 402, and the third ray 403.

[0032] Referring to Figure 2, the laser projection device 10 is the first reflective body 510, 2 reflective body 520, 3 reflective body 530 and 4 reflective body It may also include 540. 1 reflective body 510 and 2 reflective body 520 is located on one side of the coherent light 110, and the first reflective body 510 and 2 reflective body 520 is installed at intervals along the transmission direction of coherent light 110. Third reflective body 530 and 4 reflective body 540 is on the other side of coherent light 110, and is the third reflective body 530 and 4 reflective body 540 is installed at intervals along the transmission direction of coherent light 110. reflective body 510 and 4 reflective body540 is parallel to the reflector 400 when it is in the second position 420, and the second reflective body 520 and 3 reflective body 530 is parallel to the reflector 400 when it is in the third position 430. The red incoherent light generated when the second ray 402 passes through the red quantum unit 210 travels along the transmission direction of the second ray 402, and the red incoherent light first passes at an incident angle of 45°. reflective body Reflected at 510, the first reflective body The red incoherent light reflected at 510 is parallel to the coherent light 110 and has the same transmission direction as the coherent light 110, and the first reflective body The red incoherent light reflected at 510 is second at an incident angle of 45°. reflective body It reflects again at 520, and thus, the second reflective body The red incoherent light reflected at 520 is parallel to the third ray 403 and has the same transmission direction. The blue incoherent light generated when the third ray 403 passes through the blue quantum unit 220 travels along the transmission direction of the third ray 403, and this blue incoherent light first enters the third ray at an incident angle of 45°. reflective body It reflects at 530, and the third reflective body The blue incoherent light reflected at 530 is parallel to the coherent light 110 and has the same transmission direction as the coherent light 110, and the third reflective body The blue incoherent light reflected at 530° is 4th at an incident angle of 45°. reflective body It reflects again at 540, and thus, the fourth reflective body The blue incoherent light reflected at 540 is parallel to the second ray 402 and has the same transmission direction. The green incoherent light generated by passing through the green quantum unit 230 is on the same straight line as the coherent light 110 and has the same transmission direction.

[0033] Referring to Figure 2, the shaping mechanism 300 may be a specially made prism photosynthetic element, and the first reflective body 510, 2 reflective body 520, 3 reflective body 530 and 4 reflective bodyBy 540 reflecting the light rays, the light rays 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 so that the three colors of incoherent light are on the same straight line and have the same transmission direction. As a result, the three colors of incoherent light reach the imaging element 700 along the same straight line and display an image.

[0034] Referring to Figure 3, in some embodiments, the quantum mechanism 200 is capable of linear motion perpendicular to the coherent light 110, and the red quantum unit 210, blue quantum unit 220, and green quantum unit 230 are arranged along a straight line perpendicular to the coherent light 110, with the green quantum unit 230 being located in the center. As the quantum mechanism 200 moves linearly, the coherent light 110 is transmitted to the red quantum unit 210, blue quantum unit 220, and green quantum unit 230 at different times, respectively. For example, if the entire quantum mechanism 200 is above the coherent light 110, the quantum mechanism 200 may be moved downward, and in the process of the quantum mechanism 200 moving downward, the coherent light 110 first passes through the blue quantum unit 220, then through the green quantum unit 230, and finally through the red quantum unit 210. Furthermore, for example, if 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 Figure 3, the shaping mechanism 300 may be a specially made optical element. When light rays 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 on the same straight line and have the same transmission direction. As a result, the three colors of incoherent light reach the imaging element 700 along the same straight line and display an image.

[0036] Referring to Figure 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, each located at both ends of the quantum mechanism 200, and the elastic members 600 may be springs or the like. By installing the elastic members 600, a buffering effect can be achieved against the motion of the quantum mechanism 200, while at the same time a restoring force can be generated on the quantum mechanism 200 to perform a return effect.

[0037] Referring simultaneously to Figures 1, 2, and 3, the laser projection device 10 may further include an imaging element 700. When the incoherent light from the shaping mechanism 300 reaches the imaging element 700, the imaging element 700 performs an imaging action on the light and can 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 quantum dot 242 can convert the coherent light 110 into incoherent light. In this way, interference from the coherent light 110 to the imaging element 700 can be effectively avoided, reducing the speckles appearing on the imaging element 700 and ultimately improving the speckle removal performance of the laser projection device 10.

[0038] The technical features of the embodiments described above can be combined in any way, and for the sake of explanation, not all possible combinations of the technical features in the embodiments described above have been explained. However, as long as these combinations of technical features are not contradictory, they should be considered to fall within the scope described herein.

[0039] The embodiments described above merely illustrate some embodiments of the present application, and although the descriptions are specific and detailed, they should not be understood as limiting the scope of the claims of the present application. It should be noted that a person skilled in the art could make several further modifications and alterations without departing from the concept of the present application, and all of these would fall within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be based on the attached 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 Reflector, 410 First position, 420 Second position, 430 Third position, 401 First ray, 402 Second ray, 403 Third ray, 510 First reflective body , 520 No. 2 reflective body , 530 No. 3 reflective body , 540 No. 4 reflective body , 600 elastic member, 700 imaging element

Claims

1. A laser light source that generates coherent light, A quantum mechanism that converts coherent light into incoherent light, comprising 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 contained in the red quantum unit, the blue quantum unit, and the green quantum unit have different particle sizes. A shaping mechanism that ensures the incoherent light from the red quantum unit, the blue quantum unit, and the green quantum unit is transmitted along the same direction, Includes, A laser projection apparatus characterized in that the particle size of the quantum dots of the red quantum unit is 2.5 nm to 3.5 nm, the particle size of the quantum dots of the green quantum unit is 1 nm to 2 nm, and the particle size of the quantum dots of the blue quantum unit is 0.5 nm to 1.5 nm.

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

3. During the rotation process, the reflecting mirror is a plane mirror and is positioned to form an acute angle with the coherent light. The laser projection apparatus according to claim 2, characterized in that the reflector reflects the coherent light at a first position to form a first ray, reflects the coherent light at a second position to form a second ray, and reflects the coherent light at a third position to form a third ray, the first ray is perpendicular to the coherent light, the second ray and the third ray are on opposite sides of the first ray, and the angle between the second ray and the first ray is equal to the angle between the third ray and the first ray.

4. The laser projection apparatus according to claim 3, characterized in that the green quantum unit receives the first ray, one of the blue quantum unit and the red quantum unit receives the second ray, and the other receives the third ray.

5. The laser projection apparatus according to claim 2, characterized in that the three 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 reflecting mirror and the laser light source, and the green quantum unit is located between the red quantum unit and the blue quantum unit.

6. The aforementioned reflecting mirror is a plane mirror, When in the first position, the reflector is perpendicular to the coherent light and transmits the coherent light to form the first 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 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 ray. When the reflector is in the second position, it is perpendicular to the reflector when it is in the third position. The transmission direction of the first ray and the transmission direction of the coherent light are the same. The laser projection apparatus according to claim 2, characterized in that the transmission direction of the second ray and the transmission direction of the third ray are opposite and perpendicular to the transmission direction of the coherent light between the reflector and the laser light source.

7. The laser projection apparatus according to claim 6, characterized in that the green quantum unit is perpendicular to the coherent light and receives the first ray, the red quantum unit and the blue quantum unit are on the opposite side of the coherent light, one of the red quantum unit and the blue quantum unit receives the second ray and the other receives the third ray.

8. It further includes a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, and a fourth reflecting mirror, The first reflecting mirror and the fourth reflecting mirror are parallel to the reflecting mirror when it is in the second position. The second reflecting mirror and the third reflecting mirror are parallel to the reflecting mirror when it is in the third position. The second ray that has passed through the quantum mechanism is reflected by the first and second reflectors in succession to form a ray that is parallel to the third ray and has the same transmission direction. The laser projection apparatus according to claim 7, characterized in that the third ray that has passed through the quantum mechanism is reflected by the third reflector and the fourth reflector in succession to form a ray that is parallel to the second ray and has the same transmission direction.

9. The laser projection apparatus according to claim 1, characterized in that the quantum mechanism is capable of linear motion 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. The laser projection apparatus according to claim 9, further comprising an elastic member to which one end is fixedly connected and the other end is connected to the quantum mechanism.

11. The red quantum unit, the blue quantum unit, and the green quantum unit are connected integrally 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 imaging element further includes an imaging element that receives light rays from the shaping mechanism and forms an image. The coherent light is a blue laser or an ultraviolet laser, and The incoherent light that has passed through the red quantum unit, the blue quantum unit, and the green quantum unit becomes parallel to each other or lies in the same straight line after passing through the shaping mechanism. A laser projection apparatus according to claim 1, characterized by at least one of the following.

Images