CN113154331A - Projection device for vehicle, method for manufacturing the same, and headlight for vehicle - Google Patents

Projection device for vehicle, method for manufacturing the same, and headlight for vehicle Download PDF

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Publication number
CN113154331A
CN113154331A CN202010075668.8A CN202010075668A CN113154331A CN 113154331 A CN113154331 A CN 113154331A CN 202010075668 A CN202010075668 A CN 202010075668A CN 113154331 A CN113154331 A CN 113154331A
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China
Prior art keywords
light valve
light
lens
optical axis
imaging
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Granted
Application number
CN202010075668.8A
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Chinese (zh)
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CN113154331B (en
Inventor
陈时伟
庄泳明
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Young Optics Inc
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Young Optics Inc
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Priority to CN202010075668.8A priority Critical patent/CN113154331B/en
Publication of CN113154331A publication Critical patent/CN113154331A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/60—Projection of signs from lighting devices, e.g. symbols or information being projected onto the road

Abstract

A projection device for a vehicle. The projection device comprises a light source, a light valve and an imaging lens. The light source is used for emitting light beams. The light valve is positioned in the optical path downstream of the light source. The imaging lens is located downstream of the light valve in the optical path and has an optical axis. The light valve is positioned on the optical axis of the imaging lens, inclines relative to the imaging lens and forms an acute angle with the optical axis. The light beam passing through the imaging lens forms a first imaging plane and a second imaging plane.

Description

Projection device for vehicle, method for manufacturing the same, and headlight for vehicle
Technical Field
The present invention relates to a projector, a method of manufacturing the same, and a headlight, and more particularly to a projector for a vehicle, a method of manufacturing the same, and a headlight.
Background
Two different image planes projected by the conventional projection device have different resolutions respectively. Typically, one of the imaging planes has poor resolution, resulting in poor overall imaging quality. In view of the above, there is a need to provide a new projection apparatus capable of improving the above problems.
Disclosure of Invention
The invention relates to a projection device of a vehicle, a vehicle front lamp holder and a manufacturing method thereof, which can solve the problems.
According to an embodiment of the present invention, a projection device for a vehicle is provided. The projection device comprises a light source, a light valve and an imaging lens. The light valve is positioned in the optical path downstream of the light source. The imaging lens is located in the optical path downstream of the light valve and has an optical axis. The light valve is positioned on the optical axis of the imaging lens, the light valve is inclined relative to the imaging lens and forms an acute angle with the optical axis, and the imaging lens can image a light beam emitted by the light source on a first imaging surface and a second imaging surface approximately vertical to the first imaging surface. The light valve is tilted with respect to the optical axis, so that the resolution of the imaging plane can be increased.
According to another embodiment of the invention, a projection device for a vehicle is provided. The projection device comprises a light valve, an imaging lens and a lamp shade. The light valve includes a plurality of self-luminous light emitting elements arranged in a matrix form. The imaging lens is located in the optical path downstream of the light valve and has an optical axis. The lamp shade of the car lamp is positioned at the downstream of the optical path of the imaging lens. The light valve is positioned on the optical axis of the imaging lens, the light valve inclines relative to the imaging lens and forms an acute angle relative to the optical axis, and the imaging lens can enable a light beam with a pattern emitted by the light valve to pass through a lampshade of the car lamp and be imaged on a first imaging surface and a second imaging surface approximately perpendicular to the first imaging surface. The light valve is tilted with respect to the optical axis, so that the resolution of the imaging plane can be increased.
According to another embodiment of the present invention, a method for manufacturing a projection device is provided. The manufacturing method includes the following steps. Providing a light source; assembling a light valve in the optical path downstream of the light source; an imaging lens is arranged at the downstream of the light path of the light valve, wherein the imaging lens can image a light beam emitted by the light source on a first imaging surface and a second imaging surface which is approximately vertical to the first imaging surface, and the light valve is arranged on an optical axis of the imaging lens, inclines relative to the imaging lens and forms an acute angle relative to the optical axis. In the step of configuring the light valve, since the light valve is inclined with respect to the optical axis, the resolution of the imaging plane can be increased.
According to another embodiment of the present invention, a headlamp is provided. The headlight of the vehicle front comprises a self-luminous light valve, a lens set and a lampshade of the vehicle light. The lens group is arranged at the downstream of the light valve light path. The lamp shade of the car lamp is arranged at the downstream of the optical path of the lens group. The optical axis of the self-luminous light valve is not parallel to the optical axis of the lens group, and the lens group can image a light beam with a pattern emitted by the self-luminous light valve on a first imaging surface and a second imaging surface approximately vertical to the first imaging surface through a lamp shade of the vehicle lamp.
In order to better appreciate the above and other aspects of the present invention, the following detailed description of the embodiments is provided in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a schematic view illustrating that the projection apparatus 100 projects the first imaging plane M1 and the second imaging plane M2 according to an embodiment of the invention.
Fig. 2 is a schematic diagram of the projection apparatus 100 of fig. 1.
Fig. 3 is a schematic diagram illustrating a change between the modulation transfer curve S21 of the second imaging plane M2 when the light valve 120 is vertically disposed and the modulation transfer curve S22 of the second imaging plane M2 when the acute angle a1 of fig. 2 is 84 degrees.
Fig. 4 is a schematic diagram of a projection apparatus 200 according to another embodiment of the invention.
Fig. 5 is a schematic view illustrating a projection apparatus 300 according to another embodiment of the invention.
Fig. 6A and 6B are schematic diagrams illustrating a projection device 400 according to another embodiment of the invention.
Detailed Description
Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram illustrating a projection apparatus 100 according to an embodiment of the invention projecting a first imaging plane M1 and a second imaging plane M2, and fig. 2 is a schematic diagram illustrating the projection apparatus 100 of fig. 1.
As shown in fig. 2, the projection device 100 includes a light source 110, a light valve 120, an imaging lens (or lens group) 130, and a micro-lens array 140. The light source 110 can emit a first light beam L1. The light source 110 is, for example, a light emitting diode or other self-luminous light emitting element. The light valve 120 is positioned in the optical path downstream of the light source 110. Any one of a Digital micro mirror device (DMD), a liquid crystal panel (LCD), a laser scanning (laser scanning), and a Liquid Crystal On Silicon (LCOS) panel can be used as the light valve according to the embodiment of the present invention. The imaging lens 130 is located downstream of the light valve 120 in the optical path and has an optical axis O1. The light valve 120 is located on the optical axis O1 of the imaging lens 130. The optical axis of the light valve 120 is not substantially parallel to the optical axis O1 of the imaging lens 130, for example, the light valve 120 is tilted with respect to the imaging lens 130 and forms an acute angle a1 with respect to the optical axis O1. In the embodiment, the light valve 120 is disposed on the optical axis O1 with the first portion 121 inclined toward the imaging lens 130, or disposed on the optical axis O1 with the second portion inclined toward the imaging lens 130. The first portion 121 is, for example, a portion above the center C1 of the light valve 120, and the second portion is, for example, a portion below the center C1 of the light valve 120. The imaging lens 130 can image the light beam emitted from the light source 110 on the first imaging plane M1 and the second imaging plane M2 approximately (substantially or approximately) perpendicular to the first imaging plane M1. Since the light valve 120 is disposed on the optical axis O1 such that the first portion 121 thereof is inclined toward the imaging lens 130, the resolution of the imaging plane, for example, the second imaging plane M2, can be increased.
The first imaging plane M1 and the second imaging plane M2 are non-coplanar imaging planes, and an included angle therebetween is not 0 degree or 180 degrees. For example, as shown in fig. 2, the first imaging plane M1 is substantially perpendicular to the second imaging plane M2. In an embodiment, the second imaging plane M2 is, for example, the ground (or horizontal plane), and the first imaging plane M1 is substantially perpendicular to the ground. In another embodiment, the included angle between the first imaging plane M1 and the second imaging plane M2 may be an angle other than 90 degrees.
In one embodiment, the acute angle a1 of the light valve 120 with respect to the optical axis O1 is, for example, between about 84 degrees and about 88 degrees. This range of angles can achieve the technical effect of improving the resolution of the second imaging plane M2, so that the projection apparatus 100 provides satisfactory imaging quality.
After the light valve 120 is tilted, the focal point F1 of the first light beam L1 reflected from the light valve 120 may be shifted upward or downward from the optical axis O1, which results in a deterioration in resolution of the imaging plane. As shown in fig. 2, the center C1 of the light valve 120 of the embodiment of the invention is located above the optical axis O1, so that the focal point F1 of the first light beam L1 reflected from the light valve 120 can return to the optical axis O1, which can effectively improve the resolution of the second image forming plane M2. In one embodiment, the distance H1 between the center C1 of the light valve 120 and the optical axis O1 may be between 0.01 mm and 3 mm. However, the embodiment of the invention does not limit the distance H1 between the center C1 of the light valve 120 and the optical axis O1, as long as the focal point F1 of the first light beam L1 reflected from the light valve 120 can fall on the optical axis O1. In another embodiment, if the resolution of the second imaging plane M2 can be improved, the center C1 of the light valve 120 can substantially coincide with the optical axis O1.
As shown in fig. 2, the imaging lens 130 includes at least one lens 131 with diopter, the lens 131 may be one or more, and the lens 131 may be disposed in the optical path downstream of the light valve 120. The lens 131 is, for example, a single-piece lens or a cemented lens. The lenses 131 can correct aberrations.
As shown in FIG. 2, microlens array 140 may be positioned in an optical path upstream of light valve 120, such as in an optical path between light source 110 and light valve 120. The microlens array 140 includes a plurality of microlens structures 141. The micro-lens structures 141 can homogenize the first light beam L1, so that most or all of the homogenized first light beam L1 is incident on the light valve 120. In another embodiment, the lens array 140 may be omitted from the projection apparatus 100, in this example, the first light beam L1 emitted from the light source 110 may be directly projected to the light valve 120 without any physical optical element, but the embodiment of the invention is not limited thereto.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a variation between a modulation transfer curve S21 of the second image forming surface M2 when the light valve 120 is disposed perpendicular to the optical axis O1 and a modulation transfer curve S22 of the second image forming surface M2 when the acute angle a1 in fig. 2 is 84 degrees. The horizontal axis of the graph represents spatial frequency, and the vertical axis represents Modulation Transfer Function (MTF). The higher the modulation transfer function is, the better the resolution is; otherwise, the worse.
The modulation transfer function (modulation transfer curve S21) of the second imaging plane M2 when the light valve 120 is not tilted (angle a1 is equal to 90 degrees) is lower than the modulation transfer function (modulation transfer curve S22) of the second imaging plane M2 when the light valve 120 is tilted (acute angle a1 exemplifies 84 degrees), and it can be seen that the resolution of the second imaging plane M2 increases after the light valve 120 is tilted.
Referring to fig. 4, a schematic diagram of a projection apparatus 200 according to another embodiment of the invention is shown. The projection device 200 includes a light valve 210 and an imaging lens 130. Unlike the projection device 100, the light valve 210 can emit the second light beam L2 with a pattern, so that the projection device 200 can selectively omit the light source.
The light valve 210 is, for example, an auto-luminescence light valve, which may include a plurality of auto-luminescence light-emitting elements 211 arranged in a matrix. The imaging lens 130 is positioned downstream in the optical path of the light valve 210 and has an optical axis O1. The light valve 210 is located on the optical axis O1 of the imaging lens 130, and the light valve 210 is tilted with respect to the imaging lens 130 and forms an acute angle a1 with respect to the optical axis O1. In the present embodiment, the light valve 210 is tilted toward the imaging lens 130 by the first portion 212. The imaging lens 130 can image the second light beam L2 emitted from the light valve 210 on the first imaging plane M1 and the second imaging plane M2. Since the light valve 210 is disposed on the optical axis O1 such that the first portion 212 thereof is inclined toward the imaging lens 130, the resolution of the second imaging plane M2 can be increased.
In one embodiment, the acute angle a1 of the light valve 210 with respect to the optical axis O1 is, for example, between about 84 degrees and about 88 degrees. This angle range can achieve the technical effect of increasing the resolution of the second imaging plane M2.
After the light valve 210 is tilted, the focal point F2 of the second light beam L2 emitted from the light valve 210 may be shifted upward or downward from the optical axis O1, which results in a deterioration in resolution of the image plane. As shown in fig. 4, since the center C2 of the light valve 210 is located above the optical axis O1, the focal point F2 of the second light beam L2 of the light valve 210, which is obliquely positioned, can be returned to the optical axis O1, which can improve the resolution of the second imaging plane M2. In one embodiment, the distance H2 between the center C1 of the light valve 210 and the optical axis O1 may be between 0.01 mm and 3 mm. The embodiment of the invention does not limit the distance H2 between the center C2 of the light valve 210 and the optical axis O1, as long as the focal point F2 of the second light beam L2 from the light valve 210 falls back on the optical axis O1. In another embodiment, if the resolution of the second imaging plane M2 can be increased, the center C2 of the light valve 210 can substantially coincide with the optical axis O1.
As shown in fig. 4, in the present embodiment, the light valve 210 includes a plurality of the light emitting devices 211 and a substrate 213, wherein the light emitting devices 211 are disposed on the substrate 213. The substrate 213 is, for example, a circuit board. The light emitting element 211 is, for example, a self-luminous light emitting element, and in this example, the light valve 210 does not require a backlight module. In one embodiment, the light emitting device 211 is, for example, a Micro light emitting diode (Micro LED), which can be disposed on the substrate 213 by using a suitable technique such as bulk transfer and can be packaged as a single Micro LED chip with a size of less than 100 microns. The micro light emitting diode chip can realize independent addressing of each pixel (pixel) and independent driving light emission (self-luminescence) like an Organic Light Emitting Diode (OLED), but compared with the OLED, the micro light emitting diode chip is more power-saving and has a faster response speed. In another embodiment, the light emitting elements 211 are, for example, submillimeter light emitting diodes (Mini LEDs) between about 100 microns and about 200 microns. However, for example, according to the classification of the electric company, a typical light emitting diode die is between about 200 microns and about 300 microns, a Mini LED is between about 50 microns and about 60 microns, and a Micro LED is about 15 microns, so the size is not suitable for unique classification, only for auxiliary classification, or whether it can be distinguished from the light emission and LED production technology. In an embodiment, the light emitting elements 211 can be controlled to emit light independently, so that some of the light emitting elements 211 emit light, and others do not emit light, so that the second light beam L2 presents a pattern. Further, by controlling the plurality of light emitting elements 211, the pattern of the second light beam L2 can be changed. In other embodiments, the light emitting elements 211 can emit light of different colors (different color temperatures) at the same time, and each light emitting element 211 can emit a plurality of different colors of light, such as red light, blue light, green light, and white light. Alternatively, all the light emitting elements 211 can emit light with a single color having different gray scales, such as white light or color light with any color temperature.
In addition, the plurality of light emitting elements 211 may be arranged in an n × m matrix, where n and m are positive integers equal to or greater than 1, the sum of n and m is greater than 2, and the values of n and m may be equal to or different from each other. In one embodiment, n and m may have values between about 1 and about 1000000, such as several, tens, hundreds, thousands, tens of thousands or hundreds of thousands, and the like, or even more. Thus, the resolution of the pattern of the second light beam L2 can be improved and/or the second light beam L2 can provide more pattern variations.
Referring to fig. 5, a schematic diagram of a projection apparatus 300 according to another embodiment of the invention is shown. The projection device 300 includes a light source 110, a light valve 120, an imaging lens (or lens group) 330, and a micro-lens array 140.
In the embodiment, the imaging lens 330 includes at least one lens 131 with refractive power and an asymmetric optical element (asymmetric optical element)331, the lens 131 may be one or more, and the lens 131 may be disposed on the optical path between the light valve 120 and the asymmetric optical element 331. The asymmetric optical element 331 may be located in an optical path between the light source 110 and the light valve 120, or an optical path between the light valve 120 and the imaging lens 130, such as an optical path between the light valve 120 and the lens 131. The asymmetric optical element 331 may change the aspect ratio of the first light beam L1 passing through the imaging lens 330. In other words, the imaging lens 330 can change the aspect ratio of the light emitted from the light source 110, so that the aspect ratio of the imaging plane (the whole of the first imaging plane M1 and the second imaging plane M2) is not limited by the aspect ratio of the light emitted from the light source 110.
In an embodiment, the asymmetric optical element 331 may include at least two lenses, one of the two lenses is, for example, a Wedge plate (Wedge plate), a Wedge lens (Wedge lenses) or a lens with diopter, and the other of the two lenses is, for example, a Wedge plate, a Wedge lens or a lens with diopter. By the combination of the two lenses, the pattern of the first light beam L1 passing through the imaging lens 330 can be deformed and the dispersion can be compensated. The aforementioned wedge-shaped plate or wedge-shaped lens is changed in aspect ratio of the first light beam L1 passing through the imaging lens 330 by using the optical path difference change. In addition, the Lens with diopter can be cylindrical Lens (cylindrical Lens), cylindrical array Lens (Lenticular Lens), Biconic Lens (Biconic Lens), or a combination thereof, or other Lens with a plane, a spherical surface, an aspherical surface, or other curved surface with curvature.
Referring to fig. 6A and 6B, schematic diagrams of a projection device 400 according to another embodiment of the invention are shown. The projection device 400 of the present embodiment is illustrated as applied to a vehicular lamp. However, the projection device of the embodiment of the invention can be applied to other optical products requiring illumination or pattern projection according to actual requirements, and is not limited to being applied to car lamp products.
The projector (headlamp) 400 includes a light source housing 410, the light valve 120 (or 210), the imaging lens 130 (or 330), the microlens array 140, a lens barrel 430, a circuit board 440, heat dissipation fins 450, a fan 460, and a lamp cover (headlamp cover) 470. In another embodiment, if not required, at least one of the light source housing 410, the lens barrel 430, the circuit board 440, the heat sink 450, the fan 460 and the lamp cover 470 may be optionally omitted from the projection apparatus 400.
The light source 110 is disposed inside the light source housing 410 to be protected by the light source housing 410 and to prevent light leakage. The imaging lens 130 (or 330) is disposed inside the lens barrel 430 to be protected by the lens barrel 430. In the present embodiment, the light source 110 is disposed and electrically connected to the circuit board 440, so that an external signal (not shown) can control the light emitting mode of the light source 110 through the circuit board 440. The heat generated by the light source 110 can be conducted to the heat sink 450 through a heat pipe (not shown). The fan 460 can force the heat of the heat sink 450 out of the projection device 400. The lamp cover 470 may cover the light source housing 410, the light source 110, the micro lens array 140, the lens barrel 430, the imaging lens 130 (or 330), the circuit board 440, the heat dissipation fins 450, and the fan 460 to protect these components. In another embodiment, more than two sets of projection modules can be disposed in the lamp cover 470, and one set of projection modules includes the light source housing 410, the light source 110, the micro lens array 140, the lens barrel 430, the imaging lens 130 (or 330), the circuit board 440, the heat sink fins 450, and the fan 460.
The lamp cover 470 is located downstream in the optical path of the imaging lens 130 (or 330). The lamp cover 470 allows the first light beam L1 passing through the imaging lens 130 (or 330) to exit the lamp cover 470. The first light beam L1 emitted from the lamp housing 470 may be projected to a road surface or a distant target. In detail, the imaging lens 130 (or 330) can image the first light beam L1 with pattern emitted from the light valve 120 onto the first imaging plane and the second imaging plane approximately perpendicular to the first imaging plane through the lamp cover 470. As shown in fig. 1, the second aspect ratio projected by the first light beam L1 refers to the aspect ratio of the first light beam L1 exiting the lamp housing 470 projected onto the first or second imaging surface of the road surface or the remote target. The ratio of the second aspect ratio is, for example, 0.5 or less.
As shown in fig. 6B, the light source 110 is disposed on the surface 440s of the circuit board 440, and the normal direction N1 of the surface 440s is substantially parallel to the optical axis of the light source 110. In addition, although not shown, the projection device 400 may further include a power board (power board) electrically connected to the circuit board 440 for transmitting power (e.g., power from a power source external to the projection device 400) to the circuit board 440. In another embodiment, the power board may be disposed outside the projection device 400 and electrically connected to the circuit board 440 through a wire (not shown).
Further, one of the manufacturing methods of the projection device of the embodiment of the invention includes the steps of: providing a light source; assembling a light valve in the optical path downstream of the light source; and assembling an imaging lens at the downstream of the light path of the light valve, wherein the imaging lens can image a light beam emitted by the light source on a first imaging surface and a second imaging surface approximately perpendicular to the first imaging surface, and the light valve is positioned on an optical axis of the imaging lens, is inclined relative to the imaging lens and forms an acute angle with respect to the optical axis. However, the projection device of the embodiment of the invention can be manufactured by other methods, and is not limited by the manufacturing process.
As shown in the projection apparatus according to the embodiment of the invention, the light valve or the light source is tilted with respect to the optical axis, so that the resolution of one of the imaging planes (e.g., the second imaging plane M2) can be increased, and the projection apparatus provides satisfactory imaging quality. In addition, no matter the projection apparatus 100, 200, 300 or 400, the technical effect of improving the resolution of one of the imaging planes (e.g., the second imaging plane M2) as shown in fig. 3 can be obtained, so that the projection apparatus provides satisfactory imaging quality.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A projection device for a vehicle, comprising:
a light source;
a light valve positioned in the optical path downstream of the light source;
an imaging lens located in the optical path downstream of the light valve and having an optical axis;
the light valve is positioned on the optical axis of the imaging lens, the light valve is inclined relative to the imaging lens and forms an acute angle relative to the optical axis, and the imaging lens can image a light beam emitted by the light source on a first imaging surface and a second imaging surface approximately perpendicular to the first imaging surface.
2. A projection device for a vehicle, comprising:
a light valve including a plurality of self-luminous light emitting elements arranged in a matrix form;
an imaging lens located in the optical path downstream of the light valve and having an optical axis; and
a lamp shade positioned at the downstream of the optical path of the imaging lens;
the light valve is positioned on the optical axis of the imaging lens, the light valve is inclined relative to the imaging lens and forms an acute angle relative to the optical axis, and the imaging lens can enable a light beam with a pattern emitted by the light valve to pass through the lampshade of the car lamp and be imaged on a first imaging surface and a second imaging surface vertical to the first imaging surface.
3. The projection device of claim 1 or 2, wherein the acute angle is between 84 degrees and 88 degrees.
4. The projection device according to claim 1 or 2, wherein the light valve satisfies one of the following conditions: (1) the center of the light valve is positioned above the optical axis; (2) the center of the light valve coincides with the optical axis.
5. The projection device of claim 4, wherein the shortest distance between the center of the light valve and the optical axis is between 0.01 mm and 3 mm.
6. The projection device of claim 1, wherein the projection device further comprises:
and the micro lens array is positioned on the light path between the light source and the light valve.
7. The projection apparatus according to claim 1 or 2, wherein the imaging lens includes:
an asymmetric optical element is positioned in the optical path downstream of the light valve.
8. The projection device of claim 7, wherein the asymmetric optical element is selected from the group consisting of: a cylindrical lens, a biconic lens, a cylindrical array lens, a wedge plate, or a combination of the foregoing.
9. A method of manufacturing a projection device, comprising:
providing a light source;
assembling a light valve in the optical path downstream of the light source; and
and assembling an imaging lens on the downstream of the optical path of the light valve, wherein the imaging lens can image a light beam emitted by the light source on a first imaging surface and a second imaging surface vertical to the first imaging surface, and the light valve is positioned on an optical axis of the imaging lens, is inclined relative to the imaging lens and forms an acute angle relative to the optical axis.
10. A headlamp characterized by comprising:
a self-luminous light valve;
the lens group is arranged at the downstream of the light path of the self-luminous light valve; and
a lamp shade arranged at the optical path downstream of the lens group;
the optical axis of the self-luminous light valve is not parallel to the optical axis of the lens group, and the lens group can enable a light beam with a pattern emitted by the self-luminous light valve to pass through the lampshade of the car lamp and be imaged on a first imaging surface and a second imaging surface perpendicular to the first imaging surface.
CN202010075668.8A 2020-01-22 2020-01-22 Projection device for vehicle, method for manufacturing the same, and headlight for vehicle Active CN113154331B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010075668.8A CN113154331B (en) 2020-01-22 2020-01-22 Projection device for vehicle, method for manufacturing the same, and headlight for vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010075668.8A CN113154331B (en) 2020-01-22 2020-01-22 Projection device for vehicle, method for manufacturing the same, and headlight for vehicle

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CN113154331A true CN113154331A (en) 2021-07-23
CN113154331B CN113154331B (en) 2024-01-23

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09218461A (en) * 1996-02-15 1997-08-19 Nikon Corp Projection device
US20030107711A1 (en) * 2001-12-06 2003-06-12 Sze-Ke Wang An illumination method and apparatus for projection system
US20100118559A1 (en) * 2008-11-12 2010-05-13 Koito Manufacturing Co., Ltd. Vehicular lamp unit and vehicular lamp
US20110235356A1 (en) * 2010-03-24 2011-09-29 Takashi Sato Vehicle headlight
CN103969796A (en) * 2011-02-18 2014-08-06 扬明光学股份有限公司 Projection lens and projection device
CN105102883A (en) * 2013-04-04 2015-11-25 市光工业株式会社 Vehicle lamp
US20170241606A1 (en) * 2016-02-22 2017-08-24 Valeo Vision Light beam projection device provided with submatrices of light sources, lighting and headlight module provided with such a device
US20180045393A1 (en) * 2016-08-10 2018-02-15 Koito Manufacturing Co., Ltd. Vehicular headlamp
CN108375046A (en) * 2016-11-15 2018-08-07 扬明光学股份有限公司 To the lamps and lanterns of greeting lamp
CN108474534A (en) * 2016-01-14 2018-08-31 Zkw集团有限责任公司 The lighting unit for generating the light beam with terminator for automotive headlight
CN108613114A (en) * 2016-12-16 2018-10-02 现代自动车株式会社 Pixel light headlamp for vehicle
CN108826217A (en) * 2017-04-28 2018-11-16 法雷奥照明公司 The lamp module with the optimization optical imagery for pixelation spatial light modulator for motor vehicles
US20190113199A1 (en) * 2017-10-16 2019-04-18 Valeo Vision Lighting module for motor vehicle

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09218461A (en) * 1996-02-15 1997-08-19 Nikon Corp Projection device
US20030107711A1 (en) * 2001-12-06 2003-06-12 Sze-Ke Wang An illumination method and apparatus for projection system
TWI230804B (en) * 2001-12-06 2005-04-11 Optoma Corp Lighting method and device of projection system
US20100118559A1 (en) * 2008-11-12 2010-05-13 Koito Manufacturing Co., Ltd. Vehicular lamp unit and vehicular lamp
US20110235356A1 (en) * 2010-03-24 2011-09-29 Takashi Sato Vehicle headlight
CN103969796A (en) * 2011-02-18 2014-08-06 扬明光学股份有限公司 Projection lens and projection device
CN105102883A (en) * 2013-04-04 2015-11-25 市光工业株式会社 Vehicle lamp
CN108474534A (en) * 2016-01-14 2018-08-31 Zkw集团有限责任公司 The lighting unit for generating the light beam with terminator for automotive headlight
US20170241606A1 (en) * 2016-02-22 2017-08-24 Valeo Vision Light beam projection device provided with submatrices of light sources, lighting and headlight module provided with such a device
US20180045393A1 (en) * 2016-08-10 2018-02-15 Koito Manufacturing Co., Ltd. Vehicular headlamp
CN108375046A (en) * 2016-11-15 2018-08-07 扬明光学股份有限公司 To the lamps and lanterns of greeting lamp
CN108613114A (en) * 2016-12-16 2018-10-02 现代自动车株式会社 Pixel light headlamp for vehicle
CN108826217A (en) * 2017-04-28 2018-11-16 法雷奥照明公司 The lamp module with the optimization optical imagery for pixelation spatial light modulator for motor vehicles
US20190113199A1 (en) * 2017-10-16 2019-04-18 Valeo Vision Lighting module for motor vehicle

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