Projection system and projection method

Abstract

The invention 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; the mechanical module comprises a driving mechanism and is used for receiving and moving the light beam to generate a dynamic light beam; and the lens module comprises at least one lens and is used for receiving and amplifying the dynamic light beam to form a projection image. According to the system, the linear light beams are arranged to avoid the arrangement number of large-area light sources and reduce the light source cost, the mechanical module is arranged to drive the light beams of the illumination module to move to generate persistence of vision, and the dynamic projection effect with more and richer frames is achieved by matching with the light source color and brightness change of the illumination module.

Description

Technical Field

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

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

[0003] Static projection is currently the most commonly used projection method. The projected patterns are all predetermined patterns. The film is illuminated by LED and then projected using a lens module. However, the patterns are single and cannot further enhance the user experience.

[0004] The semi-dynamic projection method realizes the change of pattern by sequentially lighting up the lenses of multiple channels, in which the assembly accuracy of multiple channels is very high and a microlens array is used. The stray light has a greater impact, the dynamic pattern is relatively monotonous, and the number of dynamic pattern frames is very small.

[0005] Dynamic projection is achieved through DMD or LCD. The DMD chips currently on the market are expensive, and the illumination of LCD is relatively low, which affects the clarity of the projected pattern.

[0006] In summary, the various existing vehicle-mounted projection technologies have many disadvantages. Summary of the invention

[0007] The present application provides a projection system and a projection method to solve the problems of many drawbacks of the existing vehicle-mounted projection technology.

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

[0009] A lighting module, comprising at least one light source for providing a light beam;

[0010] a mechanical module, including a driving 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 projection image.

[0012] In a possible design, the lighting module also includes support rods for supporting the light sources to form linearly arranged light sources, the midpoints of a plurality of the support rods are cross-fixed, and the support rods are provided with notches at the cross-fixing positions so that the linearly arranged light sources on the plurality of the support rods are in the same plane.

[0013] In a possible design, the lighting module includes a blue light source arranged in a linear shape, a red light source arranged in a linear shape, and at least one green light source arranged in a linear shape.

[0014] In a possible design, the plurality of linearly arranged light sources satisfy the following formula:

[0015] 1000*SIZE / (L*Q)≤0.9;

[0016] Among them, 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 a possible design, the angles between the multiple linearly arranged light sources satisfy the following conditions:

[0018] (S1*cosq) / S≤3;

[0019] or 2≤(S1*cosq) / S≤2.5;

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

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

[0022] In one possible design, the mechanical module includes a base for fixing the lighting module, a rotating motor for driving the base to rotate, and a support base for supporting the base to rotate, the midpoint of the support rod is fixed on the axis of the base, the base is rotatably fixed on the support base, the base is in the shape of a gear, and a gear disk is fixed on the end of the output shaft of the rotating motor, and the gear disk is meshed with the gear-shaped base so that the output shaft of the rotating motor is connected to the base in an axial transmission manner.

[0023] In one possible design, the lighting module 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 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 conductively slidably 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 of the lighting module and a rotating motor for driving the reflecting prism to rotate, the reflecting prism is a pyramidal structure, and the output shaft of the rotating motor is fixedly connected to the cone bottom of the reflecting prism, and each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

[0025] In a possible design, the cone base of the reflective prism is a regular polygonal structure.

[0026] In a possible design, the mechanical module includes a reflecting prism for reflecting the light beam of the lighting module and a rotating 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 rotating motor, one end of the mechanical connecting rod is fixed to the non-axial part of the turntable, the other end of the mechanical connecting rod is fixedly connected to the fixed point, the fixed point is fixedly connected to the reflecting prism, the reflecting prism is a triangular prism structure, the mechanical connecting rod is a bending rod, each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

[0027] In a 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 the lighting module to move in a straight line. The second linear motor is fixedly connected to the reflecting prism to enable the reflecting prism to move in a straight line. The reflecting prism is a triangular prism structure. Each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

[0028] In a possible design, the first linear motor or the second linear motor includes a coil motor, a sliding rod fixed on the coil motor, and a sliding rail for limiting the sliding rod, and the sliding rod is slidably connected in the sliding rail.

[0029] In a possible design, the mechanical module drives the light beam reflected by the lighting module to meet the following conditions:

[0030] (H1+H2) / (H1′+H2′)≤1.3;

[0031] or 0.8≤(H1+H2) / (H1′+H2′)≤1;

[0032] Wherein, H1 is the optical path of the light beam from the reflection prism to the lens module when the lighting module moves to the top; H2 is the optical path of the light beam from the lighting module to the reflection prism when the lighting module moves to the top; H1′ is the optical path of the light beam from the reflection prism to the lens module when the lighting module moves to the bottom; H2′ is the optical path of the light beam from the lighting module to the reflection prism when the lighting module moves to the bottom.

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

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

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

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

[0037] Where SDS is the optical semi-aperture of the first lens, SDL is the optical semi-aperture of the last lens, OAL is the distance from the first lens to the last lens on the optical axis, and AOI is the luminous angle of the line light source.

[0038] In a 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 meet the following conditions:

[0039] L / BFL≤3.

[0040] In a second aspect, the present application provides a projection method, using a projection system, comprising:

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

[0042] The projection system and projection method provided by the present application include a lighting module, including at least one light source, for providing a light beam; a mechanical module, including a driving mechanism, for receiving and moving the light beam to generate a dynamic light beam; and a lens module, including at least one lens, for receiving and amplifying the dynamic light beam to form a projection image. In view of the many drawbacks of existing vehicle-mounted projection technology, the present application avoids the number of large-area light sources by setting a linear light beam, reduces the cost of the light source, and achieves a dynamic effect by setting a mechanical module to drive the light beam movement of the lighting module to produce visual persistence. The dynamic effect of the projection can be improved by increasing the rotation speed of the linear light source. Compared with the semi-dynamic projection system, it has more frames and richer projection content; by coordinating the light source color and brightness changes of the lighting module, the projection pattern is changed, thereby achieving a more pattern frame number and richer dynamic projection effect compared with the traditional film solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 A schematic diagram of an application scenario of the projection provided in an embodiment of the present application;

[0045] Figure 2 Schematic diagram of the lighting module structure provided in the embodiment of the present application Figure 1 ;

[0046] Figure 3 Schematic diagram of the lighting module structure provided in the embodiment of the present application Figure 2 ;

[0047] Figure 4 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 1 ;

[0048] Figure 5 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 2 ;

[0049] Figure 6 Schematic diagram of the structure of the chassis and lighting module provided in the embodiment of the present application Figure 1 ;

[0050] Figure 7 Schematic diagram of the structure of the chassis and lighting module provided in the embodiment of the present application Figure 2 ;

[0051] Figure 8 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 3 ;

[0052] Fig. 9 A schematic diagram of the reflective prism structure provided in an embodiment of the present application;

[0053] Fig.10 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 4 ;

[0054] Fig.11 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 5 ;

[0055] Fig.12 Schematic diagram of the projection system structure provided in the embodiment of the present application Figure 1 ;

[0056] Fig.13 Schematic diagram of the projection system structure provided in the embodiment of the present application Figure 2 ;

[0057] Fig.14 Schematic diagram of the projection system structure provided in the embodiment of the present application Figure 3 ;

[0058] Fig.15 Schematic diagram of the projection system structure provided in the embodiment of the present application Figure 4 ;

[0059] Fig.16 Schematic diagram of the projection system structure provided in the embodiment of the present application Figure 5 ;

[0060] Fig.17 A schematic diagram of a linear arrangement structure of multiple micro-unit LEDs provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present application. On the contrary, they are only examples of devices and systems consistent with some aspects of the present application, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0062] With the development of the automotive industry in recent years, information interaction between people and cars has gradually received attention. Currently, there are three types of projection: static projection, semi-dynamic projection, and dynamic projection. Static and semi-dynamic projection patterns are single, but the ability to transmit information is limited, so they cannot further meet customers' needs for in-vehicle projection. The cost of dynamic projection solutions is currently an important factor limiting their development. This requires an optical solution with rich projection patterns and more cost-effectiveness.

[0063] Specifically, static projection uses LED to illuminate the film and uses the lens module 103 for projection, but the pattern is single; dynamic projection achieves projection through the change of DMD or LCD, avoiding the defect of single pattern, but the cost of DMD is too high, and the pattern clarity of LCD is poor; semi-dynamic projection mainly relies on the microlens array to adjust the brightness change of the light beam, but the stray light of the microlens array has a greater impact, and the dynamic pattern has fewer frames and is relatively monotonous; therefore, it is necessary to design a projection system that meets the usage requirements.

[0064] Based on the above technical problems, the inventive concept of this application is to control the movement of a linear light beam through a driving mechanism, thereby utilizing the movement of the light beam and visual retention to combine into a complete picture, and then utilizing the brightness changes of the light source to achieve a dynamic effect, aiming to solve the above technical problems of the prior art.

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

[0066] Figure 1 Schematic diagram of the application scenario of the projection system provided in the embodiment of the present application. Figure 1 As shown, the lighting module 102 for generating a light beam includes at least one light source, the mechanical module 101 includes a driving mechanism for receiving and moving the light beam to generate a dynamic light beam, the lens module 103 includes at least one lens for receiving and amplifying the dynamic light beam to form a projection image, and the lighting module 102 is fixed on the mechanical module 101. After the lighting module 102 generates a light beam, it is incident on the lens module 103, and then a dynamic light beam is formed through the movement of the mechanical module 101 and the alternation of light and dark of the lighting module 102. After the light beam is incident on the human eye 104 through the magnification effect of the lens module 103, a complete dynamic projection image is formed using the residual vision.

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

[0068] Figure 2 Schematic diagram of the lighting module structure provided in the embodiment of the present application Figure 1 ; Figure 3 Schematic diagram of the lighting module structure provided in the embodiment of the present application Figure 2 The lighting module includes:

[0069] At least one light source and a support rod for supporting the light source are used to provide a light beam.

[0070] like Figure 2 As shown, when the light sources 105 are arranged on a supporting rod, linear arrangement of the light sources 105 located in the same plane is obtained.

[0071] The linearly arranged light sources 105 provided on the support rods are monochromatic line light sources, and monochromatic projection is achieved by switching between bright and dark.

[0072] The linearly arranged light sources may be linearly arranged light sources, curvedly arranged light sources, or a combination of linearly and curvedly arranged light sources.

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

[0074] The lighting module includes a blue light source arranged in a linear shape, a red light source arranged in a linear shape, and at least one green light source arranged in a linear shape.

[0075] Since human eyes are more sensitive to green light sources, the number of green light sources among the three primary colors is greater than that of other red and blue light sources. Therefore, the number of green light sources is usually greater than that of other color light sources, that is, at least one linearly arranged green light source is provided.

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

[0077] 1000*SIZE / (L*Q)≤0.9;

[0078] Among them, 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 adopts low-cost and high-brightness micro-unit LED.

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

[0081] (S1*cosq) / S≤3;

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

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

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

[0085] Figure 4 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 1 .like Figure 4 As shown, the mechanical module includes:

[0086] A base 201 for fixing the lighting module and a rotating motor 202 for driving the base 201 to rotate, wherein an output shaft 203 of the rotating 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, and the power source usually has a certain weight. When the lighting module needs to rotate, it obviously cannot rotate with the power source, which will consume a lot of unnecessary electric energy. Therefore, it is necessary to connect the power source and the light source through a transmission element so that the power source does not need to be moved while transmitting the electric energy. The transmission element can be an electric wire, but the electric wire will cause interference or twisting during the movement of the mechanical module and the lighting module, and the life of the electric wire is short. The transmission element can also be a first metal ring coaxially fixed to the base 201 and a second metal ring coaxially fixed to the output shaft. The first metal ring and the second metal ring are conductively slidably connected, and the second metal ring is electrically connected to the power source.

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

[0089] A base 301 for fixing the lighting module, a rotating motor 302 for driving the base 301 to rotate, and a support base 303 for supporting the base 301 to rotate, the midpoint of the support rod is fixed on the axis of the base 301, the base 301 is rotatably fixed on the support base 303, the base 301 is in the shape of a gear, and a toothed disc 304 is fixed on the end of the output shaft of the rotating motor 302, the toothed disc 304 is meshedly connected with the gear-shaped base 301, so that the output shaft of the rotating motor 302 is connected to the base 301 in an off-axis transmission manner.

[0090] Similarly, the lighting module corresponding to the mechanical module needs to be connected to a power source, and the power source usually has a certain weight. When the lighting module needs to rotate, it obviously cannot rotate with the power source, which will consume a lot of unnecessary power. Therefore, it is necessary to connect the power source and the light source through a transmission element to transmit power without moving the power source. The transmission element can be a wire, but the wire will cause interference or twisting during the movement of the mechanical module and the lighting module, and the wire life is short. The transmission element can also be 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 conductively connected in a sliding manner, and the second metal ring is electrically connected to the power source.

[0091] Figure 8 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 3 ; Fig. 9 This is a schematic diagram of the reflective prism structure provided in the embodiment of the present application. Figure 8 As shown, the mechanical module includes:

[0092] A reflecting prism 401 for reflecting the light beam of the lighting module 102 and a rotating motor 402 for driving the reflecting prism 401 to rotate, the reflecting prism 401 is a pyramidal structure, the output shaft of the rotating motor 402 is fixedly connected to the cone bottom of the reflecting prism 401, and each linear light beam of the lighting module hits the reflecting prism 401, so that the linear light beam of the lighting module hits the reflecting prism 401 and is reflected into the lens module.

[0093] like Fig. 9 As shown, the cone base of the reflecting prism is a regular polygonal structure, and the cone base is a regular polygonal pyramidal structure, which 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 to make the light beam reflect on the cone surfaces of different faces. Due to the regular polygonal structure, the structures of each cone surface are also the same, so that the position of the incident light beam will not change the light-emitting position due to the rotation of the reflecting prism.

[0094] Fig.10Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 4 .like Fig.10 As shown, the mechanical module includes:

[0095] A reflecting prism 501 for reflecting the light beam of the lighting module and a rotating motor, a turntable 502, a mechanical connecting rod 503 and a fixed point 504 for driving the reflecting prism 501 to move, wherein the turntable 502 is fixed to the output end of the rotating motor, one end of the mechanical connecting rod 503 is fixed to a non-axial position of the turntable 502, the other end of the mechanical connecting rod 503 is fixedly connected to the fixed point 504, the fixed point 504 is fixedly connected to the reflecting prism 501, the reflecting prism 501 is a triangular prism structure, the mechanical connecting rod 503 is a bending rod, each linear light beam of the lighting module hits the reflecting prism 501, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism 501.

[0096] Fig.11 Schematic diagram of the mechanical module structure provided in the embodiment of the present application Figure 5 .like Fig.11 As shown, the mechanical module includes:

[0097] A first linear motor 601, a second linear motor 602 and a reflecting prism 603, wherein the first linear motor 601 is fixedly connected to the lighting module to enable the lighting module to move linearly, and the second linear motor 602 is fixedly connected to the reflecting prism 603 to enable the reflecting prism 603 to move linearly, and the reflecting prism 603 is a triangular prism structure, and each linear light beam of the lighting module hits the reflecting prism 603, so that the linear light beam of the lighting module hits the reflecting prism 603 and then is reflected into the lens module.

[0098] Wherein, the first linear motor or the second linear motor comprises a coil motor, a sliding rod fixed on the coil motor and a sliding rail for limiting the sliding rod, and the sliding rod is slidably connected in the sliding rail.

[0099] Furthermore, the mechanical module drives the light beam reflected by the lighting module to meet the following conditions:

[0100] (H1+H2) / (H1′+H2′)≤1.3;

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

[0102] Wherein, H1 is the optical path of the light beam from the reflective prism to the lens module when the lighting module moves to the top; H2 is the optical path of the light beam from the lighting module to the reflective prism when the lighting module moves to the top; H1′ is the optical path of the light beam from the reflective prism to the lens module when the lighting module moves to the bottom; H2′ is the optical path of the light beam from the lighting module to the reflective prism when the lighting module moves to the bottom.

[0103] Specifically, through the principle of light reflection, the movement trajectory of the light beam in the lens module is controlled, so that the dynamic light beam can be connected into a complete projection pattern.

[0104] Furthermore, the lens module includes at least three lenses, and the lenses include 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, and the first lens and the last lens satisfy the following conditions:

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

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

[0109] Where SDS is the optical semi-aperture of the first lens, SDL is the optical semi-aperture of the last lens, OAL is the distance from the first lens to the last lens on the optical axis, and AOI is the luminous angle of the line light source.

[0110] Specifically, when the above conditions are met between the first lens and the last lens, the light beam angle of the lighting module can be matched with the light beam angle received by the lens module, thereby improving the light efficiency and further improving 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 meet 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 is, the larger the space for the lighting module is and the more stable the imaging effect is.

[0114] In summary, since the cost of LED is much lower than that of DMD, the high-cost DMD can be avoided by setting up micro-unit LED, and the brightness of LED is higher than that of LCD, so there is no need to worry about the unclear pattern caused by low brightness. In addition, the display of the projection pattern is realized by controlling the color and brightness changes of the micro-unit LED on the lens during movement. Compared with semi-dynamic and static projection, it has more frames and richer projection content. In addition, by driving the movement of single or multiple linearly arranged micro-unit LEDs through a mechanical module, in addition to realizing projection, it also greatly reduces the number of LED settings, further reducing the equipment configuration cost.

[0115] The projection system of the present application is described in detail below in conjunction with several specific embodiments.

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

[0117] A projection system, comprising:

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

[0119] The linearly arranged light sources are attached to the support rod, which is made of metal copper.

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

[0121] In another feasible implementation, three monochromatic linear light sources containing three primary colors are provided, namely, one blue linear light source, one green linear light source, and one red linear light source. The multicolor linear light sources satisfy that the angle Q between adjacent linear light sources is 60°, the size (SIZE) of a single light source of each color is 150um, 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 is used as the rotation center, and a notch is left near the rotation center. Multiple support rods are glued and fixed at the notch. After assembly, the light sources on the support rods are on the same horizontal plane.

[0122] The mechanical module includes a base 201 for fixing the lighting module 102 and a rotating motor 202 for driving the base 201 to rotate. The output shaft 203 of the rotating 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. The rotating motor 202 adopts an electric motor with a size 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-color linearly arranged light sources are pasted on the base 201 at the rotation center positions of multiple support rods. When light sources of different colors are rotated to the same position, different micro-unit LED brightness settings are used to achieve color changes in the projected pattern.

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

[0125] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.047, so that the light angle matching degree is good and the light efficiency is high, thereby improving the projection effect.

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

[0127] A projection system, comprising:

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

[0129] The linearly arranged light sources are attached to the support rod, which is made of metal copper.

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

[0131] In another feasible implementation, there are 4 monochromatic linear light sources, i.e., 1 blue linear light source, 2 green linear light sources, and 1 red linear light source. The multicolor linear light sources satisfy that the angle Q between adjacent linear light sources is 45°, the size (SIZE) of a single light source of each color is 100um, 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 is used as the rotation center, and a notch is left near the rotation center. Multiple support rods are glued and fixed at the notch. After assembly, the light sources on the support rods are on the same horizontal plane.

[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 including 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 conductively slidably 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 rotating motor 302 for driving the base 301 to rotate, and a support base 303 for supporting the base 301 to rotate. The midpoint of the support rod is fixed on the axis of the base 301. The base 301 is rotatably fixed on the support base 303. The base 301 is in the shape of a gear. A toothed disc 304 is fixed on the end of the output shaft of the rotating motor 302. The toothed disc 304 is meshed and connected with the gear-shaped base 301, so that the output shaft of the rotating motor 302 is connected to the base 301 in a non-axial transmission manner. The rotating motor 302 adopts an electric motor with a size of 15mm*7mm*7mm, a current input of 0.6A, a rotation speed of V=280 rpm, and V*L / 4SIZE=8400.

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

[0135] The multi-color linearly arranged light sources are pasted on the base 301 at the rotation center of multiple support rods. The base 301 is made of heat-resistant plastic material. When light sources of different colors are rotated to the same position, different micro-unit LED brightness settings are used to achieve color changes in the projected pattern.

[0136] The lens module 103 includes 6 glass lenses for receiving and amplifying the dynamic light beam to form a projection image and a lens barrel arranged outside the glass lens. The lens barrel is made of metallic copper. The distance from the center of the light source to the center of the rear side surface of the last lens (BFL) is 10.0 mm. The length (L) of the image light source surface of the linear light source luminous surface of the lens module 103 is 12.0 mm. L / BFL=1.2. The optical semi-aperture (SDS) of the first lens is 6.09, the optical semi-aperture (SDL) of the last glass lens is 4.0, the distance (OAL) from the first lens to the last lens on the optical axis is 15.9 mm, and the linear light source luminous angle (AOI) is 160°.

[0137] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.029, so that the light angle matching degree is good and the light efficiency is high, thereby improving the projection effect.

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

[0139] A projection system, comprising:

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

[0141] The linearly arranged LEDs are attached to a support rod made of copper.

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

[0143] The mechanical module includes a reflecting prism 401 for reflecting the light beam of the lighting module 102 and a rotating motor 402 for driving the reflecting prism 401 to rotate. The reflecting prism 401 is a regular polygonal pyramid structure. The output shaft of the rotating motor 402 is fixedly connected to the regular polygonal cone bottom of the reflecting prism 401. The lighting module 102 parallel to the output shaft of the rotating motor 402 hits each linear light beam onto the reflecting prism 401, so that the linear light beam of the lighting module 102 is reflected to the lens module 103 through the reflecting prism 401. The rotating motor 402 adopts an electric motor with a size of 20mm*7mm*7mm and a current input of 0.8A.

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

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

[0146]

[0147] Among them, z is the lens shape (lens sag); c is the curvature; k is a constant; r is the effective semi-aperture; α is the aspheric 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] Cone coefficient Radius of curvature A B C D 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 The third lens S1 -3.4 2.2 0.035 -0.037 0.027 -0.012 The third lens S2 -6.0 5.6 0.004 -0.002 0.002 -0.001

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

[0152] And the lens module satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.54, so that the light angle is well matched and the light efficiency is high, thereby improving the projection effect.

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

[0154] A projection system, comprising:

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

[0156] The linearly arranged light sources are attached to the support rod, which is made of metal copper.

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

[0158] The mechanical module includes a reflecting prism 501 for reflecting the light beam of the lighting module 102 and a rotating motor (not shown in the figure, whose output shaft is fixedly connected to the axis of the turntable) for driving the reflecting prism 501 to move, a turntable 502, a mechanical connecting rod 503 and a fixed point 504. The turntable 502 is fixed to the output end of the rotating motor. One end of the mechanical connecting rod 503 is fixed to the non-axis of the turntable 502. The other end of the mechanical connecting rod 503 is fixedly connected to the fixed point 504. The fixed point 504 is fixedly connected to the reflecting prism 501. The reflecting prism 501 is a triangular prism structure. The structures such as reflectors or plane reflectors only need to satisfy that the reflective prism 501 and the optical axis direction of the lens module 103 are set at a certain angle. The mechanical connecting rod 503 is a bent rod. Each linear light beam of the lighting module 102 hits the reflective prism 501. The mechanical connecting rod 503 is driven to move back and forth by the rotation of the turntable 502, thereby driving the reflector of the triangular prism structure connected to the end of the mechanical connecting rod 503 to move continuously, so that the linear light beam of the lighting module 102 hits the reflective prism 501 to form a dynamic light beam, and is reflected into the lens module 103. The rotating motor 302 adopts an electric motor with a size of 20mm*7mm*7mm and a current input of 0.8A.

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

[0160] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.5, so that the light angle matching degree is good and the light efficiency is high, thereby improving the projection effect.

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

[0162] A projection system, comprising:

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

[0164] The linearly arranged light sources are attached to the support rod, which is made of metal copper.

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

[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 reflecting mirror with a triangular prism structure or a plane reflecting mirror. It is sufficient that the reflecting prism 501 and the optical axis direction of the lens module 103 are set at a certain angle. Each linear light beam of the lighting module 102 hits the reflecting prism 501, so that the linear light beam of the lighting module 102 hits the reflecting prism 603 and then reflects into the lens module 103.

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

[0168] Among them, the first linear motor and the second linear motor move simultaneously. Specifically, when the slide rod of the second linear motor is driven by the coil motor to move the reflector of the triangular prism structure close to the lens module 103, the slide rod of the first linear motor is driven by another coil motor to move the linearly arranged light source away from the reflector of the triangular prism structure. Conversely, when the slide rod of the second linear motor is driven by the coil motor to move the reflector of the triangular prism structure away from the lens module 103, the slide rod of the first linear motor is driven by another coil motor to move the linearly arranged light source close to the reflector of the triangular prism structure, so as to realize a dynamic light beam by moving in opposite directions.

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

[0170] The lens module 103 satisfies the following formula: (90+artan((SDS-SDL) / OAL)) / AOI=0.5, so that the light angle matching degree is good and the light efficiency is high, thereby improving the projection effect.

[0171] The present application also provides a projection method, using a projection system, comprising:

[0172] After monitoring that the light beam generated by the lighting module enters the mechanical module, the mechanical module is started so that the light beam is processed by the mechanical module and then enters the lens module for processing to form a projection image.

[0173] Among them, the terms "upper" and "lower" are used to describe the relative position relationship of each structure in the accompanying drawings, which is only for the convenience of description and is not used to limit the scope of implementation of the present application. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present application without substantially changing the technical content.

[0174] It should be noted that: in this application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0175] In addition, in this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0176] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0177] Those skilled in the art can understand that in the description of the embodiments of the present application, the term "and / or" merely represents an association relationship that describes the associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" represents any combination of at least two of any one or more of a plurality of. For example, at least one of A, B, and C may represent any one or more elements selected from a set that communicates A, B, and C. In addition, the term "plurality" means two or more, unless otherwise precisely and specifically specified.

[0178] In the description of the embodiment of the present 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 sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0179] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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: A lighting module, comprising at least one light source for providing a light beam; a mechanical module, including a driving mechanism, for receiving and moving the light beam to generate a dynamic light beam; The lens module includes at least one lens for receiving and amplifying the dynamic light beam to form a projection image.

2. The system according to claim 1, characterized in that The lighting module also includes support rods for supporting the light sources to form linearly arranged light sources. The midpoints of the multiple support rods are cross-fixed, and the support rods are provided with notches at the cross-fixed 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 blue light source arranged in a linear shape, a red light source arranged in a linear shape, and at least one green light source arranged in a linear shape.

4. The system according to any one of claims 2 or 3, characterized in that: The plurality of linearly arranged light sources satisfy the following formula: 1000*SIZE / (L*Q)≤0.9; Among them, 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.

5. The system according to claim 4, characterized in that The angles between multiple linearly arranged light sources satisfy the following conditions: (S1*cosq) / S≤3; Wherein, S is the size of the light-emitting surface of a single light source, S1 is the center distance between the light-emitting surfaces of two adjacent light sources, and q is the angle between the line connecting the centers of the light-emitting surfaces of two adjacent light sources and the linear arrangement direction.

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

7. The system according to claim 4, characterized in that The mechanical module includes a base for fixing the lighting module, a rotating motor for driving the base to rotate, and a support base for supporting the base to rotate. The midpoint of the support rod is fixed on the axis of the base, and the base is rotatably fixed on the support base. The base is in the shape of a gear, and a gear disk is fixed on the end of the output shaft of the rotating motor. The gear disk is meshed with the gear-shaped base so that the output shaft of the rotating motor is connected to the base in an axial transmission manner.

8. The system according to claim 7, characterized in that The lighting module 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 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 conductively slidably connected, and the second metal ring is electrically connected to the power supply.

9. The system according to claim 1, characterized in that The mechanical module includes a reflecting prism for reflecting the light beam of the lighting module and a rotating motor for driving the reflecting prism to rotate. The reflecting prism is a pyramidal structure. The output shaft of the rotating motor is fixedly connected to the cone bottom of the reflecting prism. Each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

10. The system according to claim 9, characterized in that The cone bottom of the reflecting prism is a regular polygonal structure.

11. The system according to claim 1, characterized in that The mechanical module includes a reflecting prism for reflecting the light beam of the lighting module and a rotating 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 rotating motor, one end of the mechanical connecting rod is fixed to the non-axial part of the turntable, the other end of the mechanical connecting rod is fixedly connected to the fixed point, the fixed point is fixedly connected to the reflecting prism, the reflecting prism is a triangular prism structure, the mechanical connecting rod is a bent rod, each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

12. 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 is a triangular prism structure. Each linear light beam of the lighting module hits the reflecting prism, so that the linear light beam of the lighting module is reflected into the lens module after hitting the reflecting prism.

13. The system according to claim 12, characterized in that The first linear motor or the second linear motor comprises a coil motor, a sliding rod fixed on the coil motor and a sliding rail for limiting the sliding rod, and the sliding rod is slidably connected in the sliding rail.

14. The system according to claim 12, characterized in that The mechanical module drives the light beam reflected by the lighting module to meet the following conditions: (H1+H2) / (H1′+H2′)≤1.3; Wherein, H1 is the optical path of the light beam from the reflection prism to the lens module when the lighting module moves to the top; H2 is the optical path of the light beam from the lighting module to the reflection prism when the lighting module moves to the top; H1′ is the optical path of the light beam from the reflection prism to the lens module when the lighting module moves to the bottom; H2′ is the optical path of the light beam from the lighting module to the reflection prism when the lighting module moves to the bottom.

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

16. 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 conditions: (90+artan((SDS-SDL) / OAL)) / AOI≤1.3; Where SDS is the optical semi-aperture of the first lens, SDL is the optical semi-aperture of the last lens, OAL is the distance from the first lens to the last lens on the optical axis, and AOI is the luminous angle of the line light source.

17. 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 surface of the last lens meet the following conditions: L / BFL≤3.

18. A projection method, characterized in that: A projection system as claimed in any one of claims 1 to 17, comprising: After monitoring that the light beam generated by the lighting module enters the mechanical module, the mechanical module is started so that the light beam is processed by the mechanical module and then enters the lens module for processing to form a projection image.

Images