Variable diaphragm dynamic projection lamp for vehicle
By introducing a combination of variable aperture and patterned film into automotive projection lights, the problem of poor projection effect has been solved, achieving uniform light illumination and clear imaging, and improving the contrast and dynamic display effect of the projected image.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 陈旭东
- Filing Date
- 2025-07-08
- Publication Date
- 2026-05-12
AI Technical Summary
Existing vehicle projection lights do not provide adequate projection, and suffer from uneven light distribution, stray light interference, brightness differences between the center and edges of the projected image, and missing patterns.
It adopts a combination structure of light source, condenser lens, variable aperture, pattern film and imaging lens group. The light source and variable aperture are controlled by the control driver to adjust the light flux and beam aperture, so as to ensure that the light is uniformly irradiated on the pattern film and achieve clear imaging through the imaging lens group.
It improves the projection effect, reduces jagged edges and brightness differences in the projected image, ensures the contrast and clarity of the projected image, and enables dynamic display of the projected pattern.
Smart Images
Figure CN224229829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of projection equipment technology, and in particular to a vehicle-mounted variable aperture dynamic projection lamp. Background Technology
[0002] A projection light is a projection device that projects images, patterns, or text onto various surfaces using optical principles. It can be installed inside a vehicle (such as the inner wall of the door and next to the rearview mirror) to create an interior atmosphere and decorate the interior scene. This type of projection lamp has certain defects, resulting in poor projection effects. For example, in a microlens array projection system disclosed in CN218003912U, the disclosed technical solution involves light emanating from the light source and passing sequentially through a lens, a light-controlled pattern carrier (photolithographic mask), and an aperture. The light converged by the lens directly illuminates the light-controlled pattern carrier, and the uniformity of illumination on the surface of the light-controlled pattern carrier depends entirely on the focusing effect of the convex lens. Although the aperture can limit the aperture of its emitted beam, it cannot improve the uneven illumination of the light-controlled pattern carrier. This increases the brightness difference between the center and the edge of the projected image. Furthermore, stray light will also first illuminate the light-controlled pattern carrier, mix with the effective light, and then be filtered by the aperture. This stray light will affect the pattern of the light-controlled pattern carrier. Even if the aperture intercepts it, it cannot eliminate the contrast loss that has already occurred. In addition, the beam emitted by the lens may also cover the light-controlled pattern carrier. If the beam coverage area is too large, the aperture will directly cut off the effective pattern light at the edge of the light-controlled pattern carrier, resulting in the edge of the projected image being cut off. Utility Model Content
[0003] The purpose of this utility model is to provide a vehicle-mounted variable aperture dynamic projection lamp to solve the technical problem of insufficient projection effect of vehicle-mounted variable aperture dynamic projection lamps.
[0004] To achieve the above objectives, this utility model provides a vehicle-mounted variable aperture dynamic projection lamp, including a control driver and a light source, a condenser lens, a variable aperture, a patterned film, and an imaging lens group arranged sequentially from rear to front. The light emitted by the light source can pass through the condenser lens, the variable aperture, the patterned film, and the imaging lens group in sequence. The light source and the condenser lens are spaced apart, and the patterned film and the imaging lens group are spaced apart. The focal plane of the imaging lens group is located at the patterned film. The control driver is connected to the light source and the variable aperture.
[0005] Optionally, the condenser lens and the patterned film are spaced apart.
[0006] Optionally, the pattern film and the variable aperture are spaced apart.
[0007] Optionally, the device also includes a housing, which has a mounting cavity. The mounting cavity includes a first cavity, a second cavity, a third cavity, and a fourth cavity that are connected sequentially from back to front. The front side of the housing has a projection hole that extends through the fourth cavity. The light source is located in the first cavity, the condenser lens is located in the first cavity and the second cavity, the variable aperture is located in the third cavity, and the pattern film and the imaging lens group are located in the fourth cavity.
[0008] Optionally, the light source is mounted on the rear cavity surface of the first cavity, the condenser lens is mounted on the front cavity surface of the first cavity and protrudes from the second cavity, and the variable aperture is mounted on the rear cavity surface of the third cavity.
[0009] Optionally, the housing includes a PCB board, a first shell, and a second shell arranged sequentially from back to front. The PCB board covers the rear side of the first shell and forms the first cavity with the first shell. The second cavity is located inside the first shell. The first shell and the second shell form the third cavity. The fourth cavity and the projection hole are located in the second shell.
[0010] Optionally, the condenser lens is a convex lens, a Fresnel lens, or a reflector.
[0011] Optionally, the variable aperture is a segment LCD screen, a dot matrix LCD screen, an electromechanical micromirror, or a component with electromechanical micropores.
[0012] Optionally, the central axes of the condenser lens, the variable aperture, the pattern film, and the imaging lens are aligned.
[0013] Compared with the prior art, the variable aperture dynamic projection light for vehicles implemented in this utility model has the following advantages:
[0014] In this vehicle-mounted variable aperture dynamic projection lamp, the light source, condenser lens, variable aperture, pattern film, and imaging lens group are arranged sequentially from back to front. The light source emits light forward, which passes sequentially through the condenser lens, variable aperture, pattern film, and imaging lens group, forming an image on a plane in front. During this process, the condenser lens focuses the light emitted by the light source into collimated light and projects it forward. The variable aperture can adjust the luminous flux by changing the size of the aperture or the effective light-transmitting area. The pattern film is a transparent thin film carrier that holds a fixed pattern. It directly determines the image content projected onto the target surface. The imaging lens group consists of multiple lenses for final imaging. The control driver is connected to the light source and the variable aperture. The control driver supplies power to the light source and the variable aperture and controls them. Specifically, the control driver can control whether the light source emits light, the brightness and color of the emitted light, and can control the variable aperture to allow light to pass through a designated area while blocking light from passing through other areas. It can also control the amount of light transmitted through the areas that do pass through, thus achieving the function of dynamically displaying the projected pattern. Furthermore, the variable aperture works in conjunction with... Pattern film reduces jagged edges in the projected image, making it clearer and allowing for a more compact device. Furthermore, a variable aperture, positioned before the pattern film, restricts the beam converged by the convex lens, allowing only appropriately angled and uniformly bright light to pass through before illuminating the pattern film. This ensures uniform illumination of the pattern film surface, reducing brightness differences between the center and edges of the projected image. Additionally, the aperture intercepts stray light deviating from the main light path before reaching the pattern film, ensuring only effective light reaches the pattern film for a clearer projected pattern. Furthermore, the aperture limits the beam diameter so that the passing beam precisely covers the effective pattern area of the film, thus avoiding image loss. Additionally, the pattern film's placement in front of the imaging lens group facilitates control of the distance between them, allowing the focal plane of the imaging lens group to be positioned on the pattern film, ensuring clear imaging of the projected pattern. In summary, this vehicle-mounted variable aperture dynamic projection lamp improves projection performance by sequentially arranging the variable aperture, pattern film, and imaging lens group, and controlling the distance between them. Attached Figure Description
[0015] Figure 1 This is the front view of the variable aperture dynamic projection lamp for vehicles according to this utility model.
[0016] Figure 2 This is a top sectional view of a vehicle-mounted variable aperture dynamic projection lamp in one embodiment of the present invention.
[0017] Figure 3This is a top sectional view of a vehicle-mounted variable aperture dynamic projection lamp in another embodiment of the present invention.
[0018] Reference numerals: 1. Light source; 2. Condensing lens; 3. Variable aperture; 4. Pattern film; 5. Imaging lens group; 51. Unit lens; 6. Control driver; 7. Housing; 71. Mounting cavity; 711. First cavity; 712. Second cavity; 713. Third cavity; 714. Fourth cavity; 7141. Lens group setting section; 72. Projection hole; 73. PCB board; 74. First housing; 75. Second housing. Detailed Implementation
[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0020] In the description of this utility model, it should be understood that the terms "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0022] like Figures 1 to 3 As shown, this utility model discloses a vehicle-mounted variable aperture dynamic projection lamp, comprising a control driver 6 and a light source 1, a condenser lens 2, a variable aperture 3, a pattern film 4, and an imaging lens group 5 arranged sequentially from rear to front. The light emitted by the light source 1 can pass through the condenser lens 2, the variable aperture 3, the pattern film 4, and the imaging lens group 5 in sequence. The light source 1 and the condenser lens 2 are spaced apart, and the pattern film 4 and the imaging lens group 5 are spaced apart. The focal plane of the imaging lens group 5 is located at the pattern film 4. The control driver 6 is connected to the light source 1 and the variable aperture 3.
[0023] In the above technical solution, the light source 1 emits light forward, which passes sequentially through the condenser lens 2, the variable aperture 3, the pattern film 4, and the imaging lens group 5, and then forms an image on the plane in front. During this process, the condenser lens 2 focuses the light emitted by the light source 1 into a collimated beam and emits it forward. The variable aperture 3 can adjust the luminous flux by changing the size of the aperture or the effective light-transmitting area. The pattern film 4 is a transparent thin film carrier that holds a fixed pattern, directly determining the image content projected onto the target surface. The imaging lens group 5 consists of multiple lenses. For final imaging, the control driver 6 supplies power to the light source 1 and the variable aperture 3, and controls them. Specifically, the control driver 6 can control whether the light source 1 emits light, the brightness and color of the emitted light, and can control the variable aperture 3 to allow light to pass through a designated area while blocking light from passing through other areas. It can also control the amount of light transmitted through the areas where light passes through, thus achieving the function of dynamic display of the projected pattern. Furthermore, the variable aperture 3, in conjunction with the pattern film 4, can reduce the jaggedness of the projected image, making the projected image clearer and the device more compact. Furthermore, the variable aperture 3 is located before the pattern film 4. The aperture can first restrict the beam of light converged by the convex lens, allowing only light with a suitable angle and uniform brightness to pass through before illuminating the pattern film 4. This ensures that the surface of the pattern film 4 is evenly illuminated, thereby reducing the brightness difference between the center and the edge of the projected image. In addition, the aperture can intercept stray light that deviates from the main light path before the light reaches the pattern film 4, ensuring that only effective light illuminates the pattern film 4, making the projected pattern clearer and ensuring the contrast of the projected image. Additionally, the light... The aperture limiter ensures that the beam passing through it precisely covers the effective pattern area of the film, thus avoiding missing projected images. Furthermore, the pattern film 4, positioned in front of the imaging lens group 5, facilitates control of the distance between the pattern film 4 and the imaging lens group 5, allowing the focal plane of the imaging lens group 5 to be set at the pattern film 4, ensuring clear imaging of the projected pattern. In summary, this utility model of a vehicle-mounted variable aperture dynamic projection lamp improves the projection effect by sequentially setting the variable aperture 3, pattern film 4, and imaging lens group 5, and controlling the distance between the pattern film 4 and the imaging lens group 5.
[0024] There must be a gap between the light source 1 and the condenser lens 2 so that the light source is placed at its focal point or focal plane, thereby allowing the condenser lens 2 to converge the diverging light into parallel light. There must also be a gap between the pattern film 4 and the imaging lens group 5, which is the focal length of the imaging lens group 5.
[0025] Reference Figure 2In some embodiments, the condenser lens 2 and the pattern film 4 are spaced apart to avoid optical axis offset due to mechanical installation errors and physical obstruction of the lens during adjustment of the variable aperture 3, thereby ensuring smoother adjustment of the light transmission aperture of the variable aperture 3 and more precise control of the beam aperture.
[0026] Reference Figure 3 In other embodiments, the focusing lens 2 and the patterned film 4 are disposed in close contact.
[0027] Reference Figure 2 The pattern film 4 and the variable aperture 3 are spaced apart to avoid uneven local brightness (such as slightly darker edges) of the beam emitted from the variable aperture (even if it is collimated) at close range due to the diffraction effect at the edge of the aperture. When there is a gap between them, the beam can gradually flatten during propagation. When it illuminates the pattern film 4, the brightness distribution on the surface of the pattern film 4 is more uniform, avoiding insufficient local (especially edge) brightness of the pattern film 4 due to the shadow at the edge of the variable aperture 3, thereby reducing the brightness difference between the center and the edge of the projected image.
[0028] Reference Figure 3 In other embodiments, the pattern film 4 and the variable aperture 3 are disposed close together.
[0029] Furthermore, it also includes a housing 7, which has a mounting cavity 71 inside. The front side of the housing 7 has a projection hole 72 that extends through the mounting cavity 71. The light source 1, the condenser lens 2, the variable aperture 3, the pattern film 4, and the imaging lens group 5 are installed in the mounting cavity 71.
[0030] The mounting cavity 71 provides a closed area to prevent its projection light path from being interfered with by external factors. In addition, the light source 1, the condenser lens 2, the variable aperture 3, the pattern film 4, and the imaging lens group 5 are detachably connected to the housing 7.
[0031] Furthermore, the mounting cavity 71 includes a first cavity 711, a second cavity 712, a third cavity 713, and a fourth cavity 714 connected sequentially from back to front. The projection hole 72 is connected to the fourth cavity 714. The light source 1 is located in the first cavity 711. The condenser lens 2 is located in the first cavity 711 and the second cavity 712. The variable aperture 3 is located in the third cavity 713. The pattern film 4 and the imaging lens group 5 are located in the fourth cavity 714.
[0032] The mounting cavity 71 is divided into four chambers to achieve a certain degree of physical isolation between the components, avoid mutual interference, and reduce reflection and scattering in the optical path, further reducing the influence of stray light. Preferably, the light source 1 is mounted on the rear cavity surface of the first cavity 711, the condenser lens 2 is mounted on the front cavity surface of the first cavity 711 and protrudes from the second cavity 712, and the variable aperture 3 is mounted on the rear cavity surface of the third cavity 713 for easy installation.
[0033] Furthermore, the fourth cavity 714 is provided with a lens group setting section 7141. The lens group setting section 7141 may gradually narrow from front to back, gradually widen from front to back, or be a straight section. The imaging lens group 5 is installed in the lens group setting section 7141.
[0034] Furthermore, the imaging lens group 5 may include one unit lens 51 or multiple unit lenses 51.
[0035] Furthermore, the housing 7 includes a PCB board 73, a first housing 74, and a second housing 75 arranged sequentially from back to front. The PCB board 73 covers the rear side of the first housing 74 and forms the first cavity 711 with the first housing 74. The second cavity 712 is disposed inside the first housing 74. The first housing 74 and the second housing 75 form the third cavity 713. The fourth cavity 714 and the projection hole 72 are disposed in the second housing 75.
[0036] The PCB board 73 and the first housing 74 are detachably connected to facilitate the installation and removal of the light source 1 and the condenser lens 2. The first housing 74 and the second housing 75 are detachably connected to facilitate the installation and removal of the illumination aperture, the pattern film 4 and the imaging lens group 5. In addition, the control driver 6 is connected to the light source 1 through the PCB board 73.
[0037] Furthermore, the area of the first cavity 711 perpendicular to the front-back direction is the first area S1, the area of the second cavity 712 perpendicular to the front-back direction is the second area S2, the area of the third cavity 713 perpendicular to the front-back direction is the third area S3, and the area of the fourth cavity 714 perpendicular to the front-back direction is the fourth area S4. S1, S2, S3 and S4 can be adjusted according to requirements and are not limited here.
[0038] Furthermore, the condenser lens 2 is a convex lens, a Fresnel lens, or a reflector.
[0039] If the condenser lens 2 is a convex lens, it can ensure that light can be gathered. If the condenser lens 2 is a Fresnel lens, it can maintain high light gathering efficiency while being thinner and lighter, reduce spherical aberration and improve brightness uniformity. If the condenser lens 2 is a reflector, it can improve light efficiency, reduce light loss and adapt to high-power scenarios.
[0040] Furthermore, the variable aperture 3 is a segment LCD screen, a dot matrix LCD screen, an electromechanical micromirror, or a component with electromechanical micropores.
[0041] Among them, segment LCD screens and electromechanical micromirrors can adapt to different ambient light intensities and projection requirements, improving contrast and luminous flux control accuracy.
[0042] Furthermore, the control driver 6 may be a component including an MCU (microcontroller unit), or it may be a PWM controller or a PLC controller.
[0043] Furthermore, the central axes of the light source 1, the condenser lens 2, the variable aperture 3, the pattern film 4, and the imaging lens are aligned to ensure that light propagates along the principal optical axis, reduce eccentricity aberration, and improve the symmetry and clarity of the image.
[0044] Furthermore, fixed setting and fixed connection refer to the fixed relative positional relationship of two components, including but not limited to fixing by connectors, fixing by welding, fixing by adhesive, fixing by integral molding, and fixing by snap-fit connection.
[0045] Furthermore, detachable connection and detachable setting refer to the ability of two components to be repeatedly assembled and disassembled without damage or severe deformation, including but not limited to fixing by connectors or fixing by snap-fit connections.
[0046] Furthermore, the connectors include, but are not limited to, fasteners, straps, ropes, pneumatic connectors, hydraulic connectors, flanges, Velcro, and buttons.
[0047] In summary, this utility model embodiment provides a vehicle-mounted variable aperture dynamic projection lamp, the technical effects of which are as follows:
[0048] In this vehicle-mounted variable aperture dynamic projection lamp, the light source 1, condenser lens 2, variable aperture 3, pattern film 4, and imaging lens group 5 are arranged sequentially from back to front. The light source 1 emits light forward, which passes sequentially through the condenser lens 2, variable aperture 3, pattern film 4, and imaging lens group 5, forming an image on the front plane. During this process, the condenser lens 2 focuses the light emitted from the light source 1 into collimated light and projects it forward. The variable aperture 3 can adjust the luminous flux by changing the size of the aperture or the effective light-transmitting area. The pattern film 4 carries a fixed pattern. A transparent thin-film carrier directly determines the image content projected onto the target surface. The imaging lens group 5, composed of multiple lenses, is used for final imaging. The control driver 6 supplies power to the light source 1 and the variable aperture 3, and controls them. Specifically, the control driver 6 can control whether the light source 1 emits light, and the brightness and color of the emitted light. The control driver 6 can also control the specified area of the variable aperture 3 to allow light to pass through, while blocking light from passing through other areas. It can also control the amount of light transmitted through the areas where light passes through, thus achieving the function of dynamically displaying the projected pattern. Furthermore, the variable aperture 3 works in conjunction with the pattern film 4. This reduces jagged edges in the projected image, making it clearer and more compact. Furthermore, the variable aperture 3, positioned before the pattern film 4, restricts the beam converged by the convex lens, allowing only appropriately angled and uniformly bright light to pass through before illuminating the pattern film 4. This ensures uniform illumination of the pattern film 4 surface, reducing brightness differences between the center and edges of the projected image. Additionally, the aperture intercepts stray light deviating from the main light path before reaching the pattern film 4, ensuring only effective light reaches it, resulting in a clearer projected image and ensuring a more compact design. In addition to improving the contrast of the projected image, the aperture can limit the beam diameter so that the beam passing through it just covers the effective pattern area of the film, thus avoiding missing parts of the projected image. Furthermore, the pattern film 4, positioned in front of the imaging lens group 5, facilitates control of the distance between the pattern film 4 and the imaging lens group 5, allowing the focal plane of the imaging lens group 5 to be set at the pattern film 4, ensuring that the projected pattern can be clearly imaged. In summary, this utility model of a vehicle-mounted variable aperture dynamic projection lamp improves the projection effect by sequentially setting the variable aperture 3, pattern film 4, and imaging lens group 5, and controlling the distance between the pattern film 4 and the imaging lens group 5.
[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A vehicle-mounted variable aperture dynamic projection light, characterized in that, The system includes a control driver (6) and, from back to front, a light source (1), a condenser lens (2), a variable aperture (3), a pattern film (4), and an imaging lens group (5). The light emitted by the light source (1) can pass through the condenser lens (2), the variable aperture (3), the pattern film (4), and the imaging lens group (5) in sequence. The light source (1) and the condenser lens (2) are spaced apart, and the pattern film (4) and the imaging lens group (5) are spaced apart. The focal plane of the imaging lens group (5) is located on the pattern film (4). The control driver (6) is connected to the light source (1) and the variable aperture (3).
2. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, The focusing lens (2) and the pattern film (4) are spaced apart.
3. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, The pattern film (4) and the variable aperture (3) are set at intervals.
4. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, It also includes a housing (7), which has a mounting cavity (71) inside. The mounting cavity (71) includes a first cavity (711), a second cavity (712), a third cavity (713), and a fourth cavity (714) connected sequentially from back to front. The front side of the housing (7) has a projection hole (72) that extends through the fourth cavity (714). The light source (1) is located in the first cavity (711). The condenser lens (2) is located in the first cavity (711) and the second cavity (712). The variable aperture (3) is located in the third cavity (713). The pattern film (4) and the imaging lens group (5) are located in the fourth cavity (714).
5. The vehicle-mounted variable aperture dynamic projection lamp according to claim 4, characterized in that, The light source (1) is installed on the rear cavity surface of the first cavity (711), the condenser lens (2) is installed on the front cavity surface of the first cavity (711) and protrudes from the second cavity (712), and the variable aperture (3) is installed on the rear cavity surface of the third cavity (713).
6. The vehicle-mounted variable aperture dynamic projection lamp according to claim 4, characterized in that, The housing (7) includes a PCB board (73), a first shell (74), and a second shell (75) arranged sequentially from back to front. The PCB board (73) covers the rear side of the first shell (74) and together with the first shell (74) forms the first cavity (711). The second cavity (712) is located inside the first shell (74). The first shell (74) and the second shell (75) form the third cavity (713). The fourth cavity (714) and the projection hole (72) are located in the second shell (75).
7. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, The condenser lens (2) is a convex lens, a Fresnel lens, or a reflector.
8. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, The variable aperture (3) is a segment LCD screen, a dot matrix LCD screen, an electromechanical micromirror, or a component with electromechanical micropores.
9. The vehicle-mounted variable aperture dynamic projection lamp according to claim 1, characterized in that, The central axes of the light source (1), the condenser lens (2), the variable aperture (3), the pattern film (4), and the imaging lens are aligned.