Projection system and projection method

Abstract

The application provides a projection system and a projection method, and relates to the technical field of optics.The system comprises: an illumination module comprising at least one light source for providing a light beam; a mechanical module comprising a driving mechanism for receiving and moving the light beam to generate a dynamic light beam; and a lens module comprising at least one lens for receiving and amplifying the dynamic light beam to form a projection image.The system of the application avoids setting a large number of light sources by setting a linear light beam, reduces the cost of light sources, generates visual persistence by setting a mechanical module to drive the light beam of the illumination module to move, and further realizes a dynamic projection effect with more frame numbers and more richness by matching the color and brightness change of the light source of the illumination module.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to a projection system and projection method. Background Technology

[0002] Vehicle projection technology mainly includes static projection, semi-dynamic projection, and dynamic projection.

[0003] Static projection is a commonly used projection method. The projected pattern is a pre-determined pattern. The film is illuminated by LEDs, and then the image is projected using a lens module. However, the pattern is limited and cannot further enhance the user experience.

[0004] Semi-dynamic projection achieves pattern changes by sequentially illuminating multiple channels of lenses. The assembly precision of these multiple channels is very high, and the use of microlens arrays results in significant stray light interference. Furthermore, the dynamic patterns are relatively monotonous, with a very low frame rate.

[0005] Dynamic projection is achieved through DMD or LCD. Currently, DMD chips are expensive, while LCDs have relatively low illumination, which affects the clarity of the projected image.

[0006] In summary, the existing in-vehicle projection technologies have many drawbacks. Summary of the Invention

[0007] This application provides a projection system and projection method to address the numerous drawbacks of existing vehicle-mounted projection technologies.

[0008] In a first aspect, this application provides a projection system, comprising:

[0009] The lighting module includes at least one light source for providing a light beam;

[0010] A mechanical module, including a drive mechanism, for receiving and moving the light beam to generate a dynamic light beam;

[0011] The lens module includes at least one lens for receiving and amplifying the dynamic light beam to form a projected image.

[0012] In one possible design, the lighting module further includes support rods for supporting the light source to form a linear arrangement of light sources. The midpoints of the multiple support rods are intersected and fixed, and the support rods are provided with notches at the intersecting and fixed positions so that the linearly arranged light sources on the multiple support rods are in the same plane.

[0013] In one possible design, the lighting module includes a linear arrangement of blue light sources, a linear arrangement of red light sources, and at least one linear arrangement of green light sources.

[0014] In one possible design, the multiple linearly arranged light sources satisfy the following formula:

[0015] 1000*SIZE / (L*Q)≤0.9;

[0016] Where SIZE is the size of each light source, L is the length of the image light source surface, and Q is the angle between multiple linearly arranged light sources.

[0017] In one possible design, the included angle between multiple linearly arranged light sources satisfies the following condition:

[0018] (S1*cosq) / S≤3;

[0019] Or 2≤(S1*cosq) / S≤2.5;

[0020] Where S is the size of the emitting surface of a single light source, S1 is the center-to-center distance between the emitting surfaces of two adjacent light sources, and q is the angle between the line connecting the centers of the emitting surfaces of two adjacent light sources and the direction of the linear arrangement.

[0021] In one possible design, the mechanical module includes a base for fixing the lighting module and a rotary motor for driving the base to rotate, the output shaft of the rotary motor being coaxially and fixedly connected to the base, and the midpoint of the support rod being fixed to the axis of the base.

[0022] In one possible design, the mechanical module includes a base for fixing the lighting module, a rotary motor for driving the base to rotate, and a support for supporting the rotation of the base. The midpoint of the support rod is fixed to the axis of the base, and the base is rotatably fixed to the support. The base is gear-shaped, and a gear plate is fixed to the end of the output shaft of the rotary motor. The gear plate meshes with the gear-shaped base to enable the output shaft of the rotary motor to be connected to the base via a different axis drive.

[0023] In one possible design, the lighting module further includes a power supply for supplying power to the linearly arranged light sources and a transmission element for connecting the power supply and the linearly arranged light sources. The transmission element includes a first metal ring coaxially fixed to the base and a second metal ring coaxially fixed to the output shaft. The first metal ring and the second metal ring are electrically connected, and the second metal ring is electrically connected to the power supply.

[0024] In one possible design, the mechanical module includes a reflecting prism for reflecting the light beam from the illumination module and a rotary motor for driving the reflecting prism to rotate. The reflecting prism has a pyramidal structure, and the output shaft of the rotary motor is fixedly connected to the base of the pyramid of the reflecting prism. Each linear light beam from the illumination module hits the reflecting prism so that the linear light beam from the illumination module is reflected into the lens module after hitting the reflecting prism.

[0025] In one possible design, the cone base of the reflecting prism has a regular polygonal structure.

[0026] In one possible design, the mechanical module includes a reflecting prism for reflecting the light beam from the illumination module, a rotary motor, a turntable, a mechanical connecting rod, and a fixed point for driving the reflecting prism to move. The turntable is fixed to the output end of the rotary motor. One end of the mechanical connecting rod is fixed to a non-axial position on the turntable, and the other end of the mechanical connecting rod is fixedly connected to the fixed point. The reflecting prism is fixedly connected to the fixed point. The reflecting prism has a triangular prism structure, and the mechanical connecting rod is a bent rod. Each linear light beam from the illumination module hits the reflecting prism so that the linear light beam from the illumination module is reflected into the lens module after hitting the reflecting prism.

[0027] In one possible design, the mechanical module includes a first linear motor, a second linear motor, and a reflecting prism. The first linear motor is fixedly connected to the lighting module to enable linear movement of the lighting module. The second linear motor is fixedly connected to the reflecting prism to enable linear movement of the reflecting prism. The reflecting prism has a triangular prism structure. Each linear beam of light from the lighting module hits the reflecting prism so that the linear beam of light from the lighting module is reflected into the lens module after hitting the reflecting prism.

[0028] In one possible design, the first linear motor or the second linear motor includes a coil motor, a slide rod fixed to the coil motor, and a slide rail for limiting the slide rod, the slide rod being slidably connected within the slide rail.

[0029] In one possible design, the mechanical module drives the light beam reflected by the lighting module to satisfy the following condition:

[0030] (H1+H2) / (H1′+H2′)≤1.3;

[0031] Or 0.8≤(H1+H2) / (H1′+H2′)≤1;

[0032] In the formula, H1 is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the top; H2 is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the top; H1′ is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the bottom; and H2′ is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the bottom.

[0033] In one possible design, the lens module includes at least three lenses, including aspherical lenses and / or spherical lenses.

[0034] In one possible design, the lens module includes a first lens and a last lens, wherein the first lens and the last lens satisfy the following condition:

[0035] (90+artan((SDS-SDL) / OAL)) / AOI≤1.3;

[0036] Or 0.018≤(90+artan((SDS-SDL) / OAL)) / AOI≤0.8;

[0037] In the formula, SDS is the optical half-aperture of the first lens, SDL is the optical half-aperture of the last lens, OAL is the distance between the first and last lenses on the optical axis, and AOI is the emission angle of the line light source.

[0038] In one possible design, the length L of the image light source surface of the lens module and the distance BFL from the center of the light source to the center of the rear side surface of the last lens satisfy the following condition:

[0039] L / BFL≤3.

[0040] Secondly, this application provides a projection method employing a projection system, comprising:

[0041] After detecting that the light beam generated by the lighting module enters the mechanical module, the mechanical module is activated so that the light beam is processed by the mechanical module and then enters the lens module for processing to form a projected image.

[0042] The projection system and method provided in this application include an illumination module with at least one light source for providing a light beam; a mechanical module with a drive mechanism for receiving and moving the light beam to generate a dynamic light beam; and a lens module with at least one lens for receiving and magnifying the dynamic light beam to form a projected image. Addressing the numerous drawbacks of existing vehicle-mounted projection technologies, this application avoids the need for a large number of large-area light sources by using a linear light beam, thus reducing light source costs. Visual persistence is achieved by using a mechanical module to drive the movement of the light beam in the illumination module, realizing a dynamic effect. The dynamic effect of the projection can be enhanced by increasing the rotation speed of the linear light source. Compared to semi-dynamic projection systems, it has more frames and richer projected content. By coordinating the color and brightness changes of the light source in the illumination module, changes in the projected pattern are achieved, thus realizing a more numerous and richer dynamic projection effect compared to traditional film-based solutions. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram illustrating the application scenario of projection provided in the embodiments of this application;

[0045] Figure 2 A schematic diagram of the lighting module structure provided in the embodiments of this application. Figure 1 ;

[0046] Figure 3 A schematic diagram of the lighting module structure provided in the embodiments of this application. Figure 2 ;

[0047] Figure 4 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 1 ;

[0048] Figure 5 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 2 ;

[0049] Figure 6 Schematic diagram of the chassis and lighting module provided in the embodiments of this application Figure 1 ;

[0050] Figure 7 Schematic diagram of the chassis and lighting module provided in the embodiments of this application Figure 2 ;

[0051] Figure 8 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 3 ;

[0052] Figure 9 This is a schematic diagram of the reflective prism structure provided in an embodiment of this application;

[0053] Figure 10 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 4 ;

[0054] Figure 11 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 5 ;

[0055] Figure 12 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 1 ;

[0056] Figure 13 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 2 ;

[0057] Figure 14 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 3 ;

[0058] Figure 15 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 4 ;

[0059] Figure 16 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 5 ;

[0060] Figure 17 This is a schematic diagram of the linear arrangement structure of multiple micro-unit LEDs provided in an embodiment of this application. Detailed Implementation

[0061] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and systems consistent with some aspects of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0062] With the development of the automotive industry in recent years, information interaction between people and vehicles has gradually gained importance. Currently, projection methods include static projection, semi-dynamic projection, and dynamic projection. Static and semi-dynamic projections offer limited patterns and have limited information transmission capabilities, thus failing to meet customers' demands for in-vehicle projection. The cost of dynamic projection solutions is currently a significant factor limiting their development. Therefore, there is a need for an optical solution that offers richer projection patterns and greater cost-effectiveness.

[0063] Specifically, static projection uses LEDs to illuminate a film and then projects the image using lens module 103, but the pattern is monotonous; dynamic projection uses changes in DMD or LCD to achieve projection, avoiding the drawback of monotonous patterns, but DMD is too expensive, while LCD has poor pattern clarity; semi-dynamic projection mainly relies on microlens arrays to adjust the brightness of the beam, but stray light from the microlens array has a significant impact, and the number of dynamic pattern frames is relatively small, making it relatively monotonous; therefore, it is necessary to design a projection system that meets the usage requirements.

[0064] Based on the above-mentioned technical problems, the inventive concept of this application is to control the movement of a linear light beam through a driving mechanism, thereby combining the movement of the light beam and visual persistence to form a complete picture, and then using the changes in brightness of the light source to achieve dynamic effects, aiming to solve the above-mentioned technical problems of the prior art.

[0065] The specific application scenarios for this application are as follows:

[0066] Figure 1 This is a schematic diagram illustrating an application scenario of the projection system provided in an embodiment of this application. For example... Figure 1 As shown, the illumination module 102 for generating the light beam includes at least one light source, the mechanical module 101 includes a drive mechanism for receiving and moving the light beam to generate a dynamic light beam, and the lens module 103 includes at least one lens for receiving and magnifying the dynamic light beam to form a projected image. The illumination module 102 is fixed to the mechanical module 101. After the illumination module 102 generates the light beam, it enters the lens module 103. The dynamic light beam is formed by the movement of the mechanical module 101 and the alternation of brightness and darkness of the illumination module 102. After being magnified by the lens module 103, it enters the human eye 104 and forms a complete dynamic projected image by utilizing visual persistence.

[0067] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0068] Figure 2 A schematic diagram of the lighting module structure provided in the embodiments of this application. Figure 1 ; Figure 3 A schematic diagram of the lighting module structure provided in the embodiments of this application. Figure 2 The lighting module includes:

[0069] At least one light source and a support rod for supporting the light source, for providing a light beam.

[0070] like Figure 2 As shown, when the light source 105 is mounted on a support rod, a linear arrangement of light sources 105 located on the same plane is obtained.

[0071] The linearly arranged light source 105 on the support rod is a monochromatic line light source, which achieves monochromatic projection by adjusting the brightness.

[0072] Among them, the linearly arranged light source can be a linearly arranged light source, a curvedly arranged light source, or a combination of linear and curved light sources.

[0073] like Figure 3 As shown, when the linearly arranged light sources 105 are mounted on multiple support rods, the midpoints of the multiple support rods are fixed at intersections, and the support rods are provided with notches at the intersection positions, so that the linearly arranged light sources 105 on the multiple support rods are in the same plane.

[0074] The lighting module includes a linear arrangement of blue light sources, a linear arrangement of red light sources, and at least one linear arrangement of green light sources.

[0075] Because the human eye is more sensitive to green light, green light sources are used more often than red and blue light sources among the three primary colors. Therefore, green light sources are usually used more often than other color light sources, that is, at least one green light source is used in a linear arrangement.

[0076] Since the moving distance of adjacent linearly arranged light sources is directly related to the maximum size of the emitting surface and the angle between linearly arranged light sources of different colors, in order to achieve the following formula: each linearly arranged light source controlling different colors emits light at the same position, and multiple linearly arranged light sources can achieve color projection within the time limit:

[0077] 1000*SIZE / (L*Q)≤0.9;

[0078] Where SIZE is the size of each light source, L is the length of the image light source surface, and Q is the angle between multiple linearly arranged light sources.

[0079] The light source in the lighting module uses low-cost and high-brightness micro-unit LEDs.

[0080] Figure 17 This is a schematic diagram of a linear arrangement structure of multiple micro-unit LEDs provided in an embodiment of this application. Figure 17As shown, the included angle between multiple linearly arranged micro-unit LEDs satisfies the following condition:

[0081] (S1*cosq) / S≤3;

[0082] Preferably, 2≤(S1*cosq) / S≤2.5;

[0083] Where S is the size of the light-emitting surface of a single micro-unit LED, S1 is the center-to-center distance between the light-emitting surfaces of two adjacent micro-unit LEDs, and q is the angle between the line connecting the centers of the light-emitting surfaces of two adjacent micro-unit LEDs and the linear arrangement direction of the multiple micro-unit LEDs.

[0084] Specifically, since the projected pattern is displayed after multiple micro-unit LEDs rotate and pass through the lens module, the arrangement of the multiple micro-unit LEDs will affect the final projected pattern. By setting the above-mentioned condition range, the dark areas between pixels in the projected pattern can be reduced, making the pattern clearer and more complete.

[0085] Figure 4 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 1 .like Figure 4 As shown, the mechanical module includes:

[0086] The base 201 for fixing the lighting module and the rotary motor 202 for driving the base 201 to rotate are provided. The output shaft 203 of the rotary motor 202 is coaxially fixedly connected to the base 201, and the midpoint of the support rod is fixed on the axis of the base 201.

[0087] The lighting module corresponding to the mechanical module needs to be connected to a power source. Since power sources typically have a certain weight, it's obviously undesirable for the power source to rotate along with the lighting module, as this would consume a large amount of unnecessary electrical energy. Therefore, a transmission element is needed to connect the power source and the light source, allowing for energy transmission without moving the power source. The transmission element could be a wire, but wires can cause interference or twisting during the movement of the mechanical and lighting modules, and their lifespan is relatively short. Alternatively, the transmission element could be a first metal ring coaxially fixed to the base 201 and a second metal ring coaxially fixed to the output shaft. The first and second metal rings are electrically connected, with the second metal ring electrically connected to the power source.

[0088] Figure 5 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 2 ; Figure 6 Schematic diagram of the chassis and lighting module provided in the embodiments of this application Figure 1 ; Figure 7 Schematic diagram of the chassis and lighting module provided in the embodiments of this application Figure 2 .like Figure 5 , 6As shown in Figure 7, the mechanical module includes:

[0089] The system comprises a base 301 for fixing the lighting module, a rotary motor 302 for driving the base 301 to rotate, and a support 303 for supporting the rotation of the base 301. The midpoint of the support rod is fixed to the axis of the base 301, and the base 301 is rotatably fixed to the support 303. The base 301 is gear-shaped, and a gear disk 304 is fixed to the end of the output shaft of the rotary motor 302. The gear disk 304 meshes with the gear-shaped base 301, so that the output shaft of the rotary motor 302 and the base 301 are connected in a different-axis transmission.

[0090] Similarly, the lighting module corresponding to the mechanical module needs to be connected to a power source. Since power sources typically have a certain weight, it's obviously unacceptable for the power source to rotate along with the lighting module, as this would consume a large amount of unnecessary electrical energy. Therefore, a transmission element is needed to connect the power source and the light source, allowing for energy transmission without moving the power source. This transmission element could be a wire, but wires can cause interference or twisting during the movement of the mechanical and lighting modules, and their lifespan is relatively short. Alternatively, the transmission element could be a first metal ring coaxially fixed to the base and a second metal ring coaxially fixed to the output shaft. The first and second metal rings are electrically connected, with the second metal ring electrically connected to the power source.

[0091] Figure 8 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 3 ; Figure 9 This is a schematic diagram of a reflecting prism structure provided in an embodiment of this application. Figure 8 As shown, the mechanical module includes:

[0092] The reflective prism 401 used to reflect the light beam of the illumination module 102 and the rotary motor 402 used to drive the reflective prism 401 to rotate are provided. The reflective prism 401 has a pyramidal structure. The output shaft of the rotary motor 402 is fixedly connected to the base of the pyramid of the reflective prism 401. Each linear light beam of the illumination module hits the reflective prism 401 so that the linear light beam of the illumination module is reflected into the lens module after hitting the reflective prism 401.

[0093] like Figure 9 As shown, the base of the reflecting prism is a regular polygonal structure, and the base is a pyramidal structure with a regular polygonal shape. It can provide multiple pyramidal surfaces as reflecting surfaces, so that when the light beam hits the pyramidal surface, it is reflected into the lens module. The reflecting prism rotates with the rotating motor, causing the light beam to be reflected on different pyramidal surfaces. Since the regular polygonal structure makes the structure of each pyramidal surface the same, the position of the light beam will not change due to the rotation of the reflecting prism.

[0094] Figure 10A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 4 .like Figure 10 As shown, the mechanical module includes:

[0095] The lighting module consists of a reflective prism 501 for reflecting the light beam, a rotary motor, a turntable 502, a mechanical connecting rod 503, and a fixed point 504 for driving the reflective prism 501. The turntable 502 is fixed to the output end of the rotary motor. One end of the mechanical connecting rod 503 is fixed to a non-axial position on the turntable 502. The other end of the mechanical connecting rod 503 is fixedly connected to the fixed point 504. The reflective prism 501 is fixedly connected to the fixed point 504. The reflective prism 501 is a triangular prism structure. The mechanical connecting rod 503 is a bent rod. Each linear light beam from the lighting module hits the reflective prism 501 so that the linear light beam from the lighting module is reflected into the lens module after hitting the reflective prism 501.

[0096] Figure 11 A schematic diagram of the mechanical module structure provided in the embodiments of this application. Figure 5 .like Figure 11 As shown, the mechanical module includes:

[0097] A first linear motor 601, a second linear motor 602, and a reflecting prism 603 are provided. The first linear motor 601 is fixedly connected to the lighting module to enable the lighting module to move linearly. The second linear motor 602 is fixedly connected to the reflecting prism 603 to enable the reflecting prism 603 to move linearly. The reflecting prism 603 has a triangular prism structure. Each linear beam of light from the lighting module hits the reflecting prism 603 so that the linear beam of light from the lighting module is reflected into the lens module after hitting the reflecting prism 603.

[0098] The first linear motor or the second linear motor includes a coil motor, a slide rod fixed to the coil motor, and a slide rail for limiting the slide rod, wherein the slide rod is slidably connected within the slide rail.

[0099] Furthermore, the beam of light reflected by the lighting module driven by the mechanical module satisfies the following condition:

[0100] (H1+H2) / (H1′+H2′)≤1.3;

[0101] Preferably, 0.8 ≤ (H1+H2) / (H1′+H2′) ≤ 1;

[0102] In the formula, H1 is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the top; H2 is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the top; H1′ is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the bottom; and H2′ is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the bottom.

[0103] Specifically, by using the principle of light reflection, the trajectory of the light beam in the lens module is controlled, thereby connecting the dynamic light beams into a complete projection pattern.

[0104] Furthermore, the lens module includes at least three lenses, including aspherical lenses and / or spherical lenses.

[0105] Specifically, the projection effect can be improved by setting up multiple lenses.

[0106] Furthermore, the lens module includes a first lens and a last lens, which satisfy the following condition:

[0107] (90+artan((SDS-SDL) / OAL)) / AOI≤1.3;

[0108] Preferably, 0.018 ≤ (90 + artan((SDS-SDL) / OAL)) / AOI ≤ 0.8;

[0109] In the formula, SDS is the optical half-aperture of the first lens, SDL is the optical half-aperture of the last lens, OAL is the distance between the first and last lenses on the optical axis, and AOI is the emission angle of the line light source.

[0110] Specifically, when the first and last lenses meet the above conditions, the beam angle of the illumination module can be matched with the beam angle received by the lens module, thereby improving the light efficiency and thus the projection effect.

[0111] Furthermore, the length L of the image light source surface of the lens module and the distance BFL from the center of the light source to the center of the rear side surface of the last lens satisfy the following conditions:

[0112] L / BFL≤3.

[0113] Specifically, this condition is to provide relative space for the lighting module and the mechanical module. The smaller the L / BFL ratio, the larger the space for the lighting module and the more stable the imaging effect.

[0114] In summary, since LEDs are far less expensive than DMDs, the high cost of DMDs can be avoided by using micro-unit LEDs. Furthermore, LEDs are brighter than LCDs, so there is no need to worry about unclear patterns due to low brightness. By controlling the color and brightness changes of the micro-unit LEDs during movement and applying the principle of visual persistence on the lens, the projected pattern can be displayed. Compared with semi-dynamic and static projection, it has more frames and richer projected content. Moreover, driving the movement of single or multiple linearly arranged micro-unit LEDs through mechanical modules not only achieves projection but also greatly reduces the number of LEDs required, further reducing equipment configuration costs.

[0115] The projection system of this application will be described in detail below with reference to several specific embodiments.

[0116] Figure 12 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 1 .like Figure 12 As shown,

[0117] A projection system, comprising:

[0118] The lighting module 102 is used to provide at least one linearly arranged light source for providing a linear beam of light, the light source being a micro-unit LED.

[0119] The light sources are arranged in a linear pattern and attached to the support rod, which is made of copper.

[0120] In one feasible implementation, only one monochromatic linearly arranged light source is provided, wherein the size (SIZE) of a single light source is 150um and the length (L) of the image light source surface is 4.0mm.

[0121] In another feasible implementation, three monochromatic linear light sources containing the three primary colors are arranged: one blue line light source, one green line light source, and one red line light source. The multi-color linear light sources satisfy the following condition: the included angle Q between adjacent line light sources is 60°. The size (SIZE) of each color's individual light source is 150µm, and the length (L) of the image light source surface is 4.0mm, satisfying the following formula: 1000*SIZE / (L*Q)=0.62. The middle of the support rod serves as the rotation center, with a notch near the rotation center. Multiple support rods are glued and fixed at the notch, ensuring that the light sources on the support rods are on the same horizontal plane after assembly.

[0122] The mechanical module includes a base 201 for fixing the lighting module 102 and a rotary motor 202 for driving the base 201 to rotate. The output shaft 203 of the rotary motor 202 is coaxially and fixedly connected to the base 201, and the midpoint of the support rod is fixed to the axis of the base 201. The rotary motor 202 is an electric motor with dimensions of 20mm*7mm*7mm, a current input of 1A, a rotation speed of V = 120 rpm, and V*L / 4SIZE = 800. The base 201 is made of plastic.

[0123] The multi-colored linear light source is attached to the base 201 at the rotation center position of multiple support rods. When the light sources of different colors rotate to the same position, the brightness of different micro-unit LEDs is set, thereby realizing the color change of the projected pattern.

[0124] Lens module 103 includes four glass lenses for receiving and amplifying the dynamic beam to form a projected image and a lens barrel disposed outside the glass lenses. The lens barrel is made of copper. The distance (BFL) from the center of the light source to the center of the rear side of the last lens is 5.5 mm. The length (L) of the image light source surface of the lens module 103 is 4.0 mm, L / BFL = 0.72. The optical half-aperture (SDS) of the first lens is 4.5, the optical half-aperture (SDL) of the last glass lens is 3.0, the distance (OAL) between the first lens and the last lens on the optical axis is 16 mm, and the emission angle (AOI) of the line light source is 120°.

[0125] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.047, which results in good light angle matching, high light efficiency, and thus improves the projection effect.

[0126] Figure 13 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 2 .like Figure 13 As shown,

[0127] A projection system, comprising:

[0128] The lighting module 102 is used to provide at least one linearly arranged light source for providing a linear beam of light, the light source being a micro-unit LED.

[0129] The light sources are arranged in a linear pattern and attached to the support rod, which is made of copper.

[0130] In one feasible implementation, only one monochromatic linearly arranged light source is provided, wherein the size (SIZE) of a single light source is 150um and the length (L) of the image light source surface is 4.0mm.

[0131] In another feasible implementation, four monochromatic linear light sources are arranged: one blue line light source, two green line light sources, and one red line light source. The multi-colored linear light sources satisfy an angle Q of 45° between adjacent light sources. The size (SIZE) of each color's individual light source is 100µm, and the length (L) of the image light source surface is 12.0mm, satisfying the following formula: 1000*SIZE / (L*Q)=0.18. The middle of the support rod serves as the rotation center, with a notch near the rotation center. Multiple support rods are glued and fixed at the notch, ensuring that the light sources on the support rods are on the same horizontal plane after assembly.

[0132] The lighting module 102 also includes a power supply for supplying power to the linearly arranged light sources and a transmission element for connecting the power supply and the linearly arranged light sources. The transmission element includes a first metal ring fixed coaxially to the base and a second metal ring fixed coaxially to the output shaft. The first metal ring and the second metal ring are electrically connected and the second metal ring is electrically connected to the power supply.

[0133] The mechanical module includes a base 301 for fixing the lighting module 102, a rotary motor 302 for driving the base 301 to rotate, and a support 303 for supporting the rotation of the base 301. The midpoint of the support rod is fixed to the axis of the base 301, and the base 301 is rotatably fixed to the support 303. The base 301 is gear-shaped. A gear disk 304 is fixed to the end of the output shaft of the rotary motor 302. The gear disk 304 meshes with the gear-shaped base 301, so that the output shaft of the rotary motor 302 and the base 301 are connected in an off-axis transmission manner. The rotary motor 302 is an electric motor with dimensions of 15mm*7mm*7mm, a current input of 0.6A, a rotation speed of V = 280 rpm, and V*L / 4SIZE = 8400.

[0134] In one feasible implementation, the power supply is located inside the support base 303, and the base 301 is rotatably connected to the support base 303 via a rotating shaft. A first metal ring is sleeved outside the rotating shaft, and a protective plastic outer shell ring is sleeved on the outside of the first metal ring. The power output terminal only needs to contact the middle first metal ring to achieve conductivity, thereby transferring electrical energy to the second metal ring that is in contact with the first metal ring, and then transferring it through the second metal ring to each micro-unit LED in the lighting module 102 installed on the base 301.

[0135] The multi-colored linear light source is attached to the base 301 at the rotation center of multiple support rods. The base 301 is made of heat-resistant plastic. When the light sources of different colors rotate to the same position, the brightness of the different micro-unit LEDs is adjusted to achieve the color change of the projected pattern.

[0136] Lens module 103 includes six glass lenses for receiving and amplifying the dynamic beam to form a projected image and a lens barrel disposed outside the glass lenses. The lens barrel is made of copper. The distance (BFL) from the center of the light source to the center of the rear side of the last lens is 10.0 mm. The length (L) of the image light source surface of lens module 103 is 12.0 mm, L / BFL = 1.2. The optical half-aperture (SDS) of the first lens is 6.09, the optical half-aperture (SDL) of the last glass lens is 4.0, the distance (OAL) between the first and last lenses on the optical axis is 15.9 mm, and the emission angle (AOI) of the line light source is 160°.

[0137] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.029, which results in good light angle matching, high light efficiency, and thus improves the projection effect.

[0138] Figure 14 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 3 .like Figure 14 As shown,

[0139] A projection system, comprising:

[0140] The lighting module 102 is used to provide at least one linearly arranged light source for providing a linear beam of light, the light source being a micro-unit LED.

[0141] LEDs arranged in a linear pattern are attached to a support rod, which is made of copper.

[0142] Specifically, two linearly arranged LEDs are provided, and the two linearly arranged LEDs are positioned opposite each other and parallel to the output shaft of the rotary motor 402 in the mechanical module.

[0143] The mechanical module includes a reflecting prism 401 for reflecting the light beam from the illumination module 102 and a rotary motor 402 for driving the reflection prism 401 to rotate. The reflecting prism 401 has a regular polygonal pyramidal structure. The output shaft of the rotary motor 402 is fixedly connected to the base of the regular polygonal pyramid of the reflecting prism 401. The illumination module 102, parallel to the output shaft of the rotary motor 402, directs each linear light beam onto the reflecting prism 401, so that the linear light beams from the illumination module 102 are reflected by the reflecting prism 401 into the lens module 103. The rotary motor 402 is an electric motor with dimensions of 20mm*7mm*7mm and a current input of 0.8A.

[0144] Lens module 103 includes three plastic aspherical lenses and lens barrels for receiving and amplifying the dynamic beam to form a projected image. The lens barrels are fixed to the plastic aspherical lenses. The lens barrels are made of plastic. The distance from the center of the light source to the center of the rear side of the last lens (BFL = H1 + H2) is 3m. The length (L) of the image light source surface of lens module 103 is 2.0mm, L / BFL = 0.67. The optical half-aperture (SDS) of the first lens is 1.4, the optical half-aperture (SDL) of the last plastic aspherical lens is 1.8, the distance on the optical axis (OAL) between the first and last lenses is 9.5mm, and the emission angle (AOI) of the line light source is 160°.

[0145] Plastic aspherical lenses satisfy the following distribution formula:

[0146]

[0147] Where z is the lens shape (lens sagitta); c is the curvature; k is a constant; r is the effective half-aperture; α is the aspherical coefficient; and i is a natural number.

[0148] The specific parameters of the three lenses are shown in Table 1 below:

[0149] Table 1

[0150] First lens S1 1.3 3.3 -0.004 -0.001 0.000 -0.001 First lens S2 -97.1 38.2 0.007 -0.011 0.022 -0.027 Second lens S1 -0.2 -1.5 0.145 -0.069 0.054 -0.033 Second lens S2 -12.4 -3.2 0.021 -0.027 0.022 -0.011 Third lens S1 -3.4 2.2 0.035 -0.037 0.027 -0.012 Third lens S2 -6.0 5.6 0.004 -0.002 0.002 -0.001

[0151] Where S1 and S2 represent the two surfaces of the lens, A is the 4th order aspherical coefficient, B is the 6th order aspherical coefficient, C is the 8th order aspherical coefficient, and D is the 10th order aspherical coefficient.

[0152] Furthermore, the lens module satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.54, which results in good light angle matching, high light efficiency, and thus improves the projection effect.

[0153] Figure 15 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 4 .like Figure 15 As shown,

[0154] A projection system, comprising:

[0155] The lighting module 102 is used to provide at least one linearly arranged light source for providing a linear beam of light.

[0156] The light sources are arranged in a linear pattern and attached to the support rod, which is made of copper.

[0157] Specifically, only one monochromatic linear light source is provided, which satisfies that the size (SIZE) of a single light source is 150um, the light source is a micro-unit LED, and the length (L) of the light source surface is 4.0mm.

[0158] The mechanical module includes a reflecting prism 501 for reflecting the light beam of the illumination module 102, a rotary motor (not shown in the figure, its output shaft is fixedly connected to the axis of the turntable) for driving the movement of the reflecting prism 501, a turntable 502, a mechanical connecting rod 503, and a fixing point 504. The turntable 502 is fixed to the output end of the rotary motor. One end of the mechanical connecting rod 503 is fixed to a non-axial position on the turntable 502. The other end of the mechanical connecting rod 503 is fixedly connected to the fixing point 504. The reflecting prism 501 is fixedly connected to the fixing point 504. The reflecting prism 501 is a triangular prism structure. The structure can be a reflector or a plane reflector, as long as the optical axis of the reflecting prism 501 and the lens module 103 are set at a certain angle. The mechanical connecting rod 503 is a bent rod. Each linear beam of light from the illumination module 102 hits the reflecting prism 501. The rotation of the turntable 502 drives the mechanical connecting rod 503 to move back and forth, which in turn drives the triangular prism reflecting mirror connected to the end of the mechanical connecting rod 503 to move continuously. This allows the linear beam of light from the illumination module 102 to form a dynamic beam after hitting the reflecting prism 501 and being reflected into the lens module 103. The rotary motor 302 is an electric motor with dimensions of 20mm*7mm*7mm and a current input of 0.8A.

[0159] Lens module 103 includes three glass spherical lenses and lens barrels for receiving and amplifying the dynamic beam to form a projected image. The lens barrels are fixed to the outside of the glass spherical lenses. The lens barrels are made of metal. The distance from the center of the light source to the center of the rear side of the last lens (BFL = H1 + H2) is 7.5 mm. The length (L) of the image light source surface of the lens module 103 is 4.0 mm, L / BFL = 0.53. The optical half-aperture (SDS) of the first lens is 3.6, the optical half-aperture (SDL) of the last glass lens is 3.1, the distance on the optical axis (OAL) between the first lens and the last lens is 20 mm, and the emission angle (AOI) of the line light source is 180°.

[0160] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.5, which results in good light angle matching, high light efficiency, and thus improves the projection effect.

[0161] Figure 16 Schematic diagram of the projection system structure provided in the embodiments of this application Figure 5 .like Figure 16 As shown,

[0162] A projection system, comprising:

[0163] The lighting module 102 is used to provide at least one linearly arranged light source for providing a linear beam of light.

[0164] The light sources are arranged in a linear pattern and attached to the support rod, which is made of copper.

[0165] Specifically, only one monochromatic linear light source is provided, which satisfies that the size (SIZE) of a single light source is 150um, the light source is a micro-unit LED, and the length (L) of the light source surface is 4.0mm.

[0166] The mechanical module includes a first linear motor 601, a second linear motor 602, and a reflecting prism 603. The first linear motor 601 is fixedly connected to the lighting module 102 to enable the lighting module to move linearly. The second linear motor 602 is fixedly connected to the reflecting prism 501 to enable the reflecting prism 501 to move linearly. The reflecting prism 501 is a triangular prism structure or a plane mirror, etc. It only needs to be set at a certain angle with the optical axis of the lens module 103. Each linear beam of light from the lighting module 102 hits the reflecting prism 501 so that the linear beam of light from the lighting module 102 is reflected into the lens module 103 after hitting the reflecting prism 603.

[0167] Specifically, the first linear motor and the second linear motor have similar structures, both including a coil motor, a slide rod fixed on the coil motor, and a slide rail for limiting the slide rod. The slide rod is slidably connected within the slide rail. The end of the slide rod of the first linear motor is fixedly connected to a linearly arranged light source, while the end of the slide rod of the second linear motor is fixedly connected to a triangular prism structure reflector.

[0168] In this process, the first linear motor and the second linear motor move simultaneously. Specifically, when the slider of the second linear motor is driven by the coil motor to move the triangular prism-structured reflector closer to the lens module 103, the slider of the first linear motor is driven by another coil motor to move the linearly arranged light source away from the triangular prism-structured reflector. Conversely, when the slider of the second linear motor is driven by the coil motor to move the triangular prism-structured reflector away from the lens module 103, the slider of the first linear motor is driven by another coil motor to move the linearly arranged light source closer to the triangular prism-structured reflector, so as to achieve dynamic light beam through movement in opposite directions.

[0169] Lens module 103 includes three glass spherical lenses and lens barrels for receiving and amplifying the dynamic beam to form a projected image. The lens barrels are fixed to the outside of the glass spherical lenses. The lens barrels are made of metal. The distance from the center of the light source to the center of the rear side of the last lens (BFL = H1 + H2) is 7.5 mm. The length (L) of the image light source surface of the lens module 103 is 4.0 mm, L / BFL = 0.53. The optical half-aperture (SDS) of the first lens is 3.6, the optical half-aperture (SDL) of the last glass lens is 3.1, the distance on the optical axis (OAL) between the first and last glass lenses is 20 mm, and the emission angle (AOI) of the line light source is 180°.

[0170] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.5, which results in good light angle matching, high light efficiency, and thus improves the projection effect.

[0171] This application also provides a projection method employing a projection system, including:

[0172] Once the light beam generated by the lighting module is detected entering the mechanical module, the mechanical module is activated so that the light beam is processed by the mechanical module and then enters the lens module for processing to form a projected image.

[0173] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0174] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0175] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0176] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0177] It will be understood by those skilled in the art that, in the description of the embodiments of this application, the term "and / or" merely indicates a relationship describing the associated objects, meaning that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, the term "at least one" indicates any combination of at least two of a plurality of options, for example, including at least one of A, B, and C, which can represent any one or more elements selected from a set including communication between A, B, and C. Moreover, the term "multiple" means two or more, unless otherwise precisely specified.

[0178] In the description of the embodiments of this application, the terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0179] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A projection system, characterized in that, include: The lighting module includes multiple linearly arranged light sources composed of micro-unit LEDs for providing a light beam; A mechanical module, including a drive mechanism, for receiving and moving the light beam to generate a dynamic light beam; A lens module includes at least one lens for receiving and amplifying the dynamic light beam to form a projected image; The plurality of linearly arranged light sources satisfy the following formula: 1000 SIZE / (L Q)≤0.9; Where SIZE is the size of a single micro-unit LED light source in micrometers, L is the length of the image light source surface in millimeters, and Q is the angle between two adjacent linearly arranged light sources; The included angle between the multiple linearly arranged micro-unit LEDs satisfies the following condition: (S1 cosq) / S≤3; Where S is the size of the light-emitting surface of a single micro-unit LED, S1 is the center-to-center distance between the light-emitting surfaces of two adjacent micro-unit LEDs, and q is the angle between the line connecting the centers of the light-emitting surfaces of two adjacent micro-unit LEDs and the linear arrangement direction of the multiple micro-unit LEDs.

2. The system according to claim 1, characterized in that, The lighting module also includes support rods for supporting the light source to form a linear arrangement of light sources. The midpoints of the multiple support rods are fixed at intersections, and the support rods are provided with notches at the intersection positions so that the linearly arranged light sources on the multiple support rods are in the same plane.

3. The system according to claim 2, characterized in that, The lighting module includes a linearly arranged blue light source, a linearly arranged red light source, and at least one linearly arranged green light source.

4. The system according to claim 2, characterized in that, The mechanical module includes a base for fixing the lighting module and a rotary motor for driving the base to rotate. The output shaft of the rotary motor is coaxially and fixedly connected to the base, and the midpoint of the support rod is fixed on the axis of the base.

5. The system according to claim 2, characterized in that, The mechanical module includes a base for fixing the lighting module, a rotary motor for driving the base to rotate, and a support for supporting the rotation of the base. The midpoint of the support rod is fixed to the axis of the base, and the base is rotatably fixed to the support. The base is gear-shaped, and a gear plate is fixed to the end of the output shaft of the rotary motor. The gear plate meshes with the gear-shaped base so that the output shaft of the rotary motor and the base are connected in a different-axis transmission.

6. The system according to claim 5, characterized in that, The lighting module further includes a power supply for supplying power to the linearly arranged light sources and a transmission element for connecting the power supply and the linearly arranged light sources. The transmission element includes a first metal ring fixed coaxially to the base and a second metal ring fixed coaxially to the output shaft. The first metal ring and the second metal ring are electrically connected, and the second metal ring is electrically connected to the power supply.

7. The system according to claim 1, characterized in that, The mechanical module includes a reflecting prism for reflecting the light beam from the illumination module and a rotary motor for driving the reflecting prism to rotate. The reflecting prism has a pyramidal structure, and the output shaft of the rotary motor is fixedly connected to the base of the reflecting prism. Each linear light beam from the illumination module hits the reflecting prism so that the linear light beam from the illumination module is reflected into the lens module after hitting the reflecting prism.

8. The system according to claim 7, characterized in that, The base of the reflecting prism is a regular polygonal structure.

9. The system according to claim 1, characterized in that, The mechanical module includes a reflecting prism for reflecting the light beam from the lighting module, a rotary motor, a turntable, a mechanical connecting rod, and a fixed point for driving the reflecting prism to move. The turntable is fixed to the output end of the rotary motor. One end of the mechanical connecting rod is fixed to a non-axial position on the turntable. The other end of the mechanical connecting rod is fixedly connected to the fixed point. The reflecting prism is fixedly connected to the fixed point. The reflecting prism has a triangular prism structure. The mechanical connecting rod is a bent rod. Each linear light beam from the lighting module hits the reflecting prism so that the linear light beam from the lighting module is reflected into the lens module after hitting the reflecting prism.

10. The system according to claim 1, characterized in that, The mechanical module includes a first linear motor, a second linear motor, and a reflecting prism. The first linear motor is fixedly connected to the lighting module to enable the lighting module to move linearly. The second linear motor is fixedly connected to the reflecting prism to enable the reflecting prism to move linearly. The reflecting prism has a triangular prism structure. Each linear beam of light from the lighting module hits the reflecting prism so that the linear beam of light from the lighting module is reflected into the lens module after hitting the reflecting prism.

11. The system according to claim 10, characterized in that, The first linear motor or the second linear motor includes a coil motor, a slide rod fixed to the coil motor, and a slide rail for limiting the slide rod, wherein the slide rod is slidably connected within the slide rail.

12. The system according to claim 10, characterized in that, The light beam reflected by the illumination module driven by the mechanical module satisfies the following condition: (H1+H2) / (H1′+H2′)≤1.3; In the formula, H1 is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the top; H2 is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the top; H1′ is the optical path of the light beam from the reflecting prism to the lens module when the illumination module moves to the bottom; and H2′ is the optical path of the light beam from the illumination module to the reflecting prism when the illumination module moves to the bottom.

13. The system according to claim 1, characterized in that, The lens module includes at least three lenses, including aspherical lenses and / or spherical lenses.

14. The system according to claim 1, characterized in that, The lens module includes a first lens and a last lens, and the first lens and the last lens satisfy the following condition: (90+artan((SDS-SDL) / OAL)) / AOI≤1.3; In the formula, SDS is the optical half-aperture of the first lens, SDL is the optical half-aperture of the last lens, OAL is the distance between the first and last lenses on the optical axis, and AOI is the emission angle of the line light source.

15. The system according to claim 1, characterized in that, The length L of the image light source surface of the lens module and the distance BFL from the center of the light source to the center of the rear side of the last lens satisfy the following conditions: L / BFL≤3.

16. A projection method, characterized in that, The projection system described in any one of claims 1-15 includes: After detecting that the light beam generated by the lighting module enters the mechanical module, the mechanical module is activated so that the light beam is processed by the mechanical module and then enters the lens module for processing to form a projected image.

Images