CN112393198B - Miniaturized light projection device - Google Patents
Miniaturized light projection device Download PDFInfo
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- CN112393198B CN112393198B CN201910765424.XA CN201910765424A CN112393198B CN 112393198 B CN112393198 B CN 112393198B CN 201910765424 A CN201910765424 A CN 201910765424A CN 112393198 B CN112393198 B CN 112393198B
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- light
- light guide
- reflection
- guide portion
- miniaturized
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- 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
- F21S41/24—Light guides
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- 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
- F21S41/25—Projection lenses
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- 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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
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- 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
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- 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
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
Abstract
The invention discloses a miniaturized light projection device which comprises a heat dissipation base, a circuit substrate, a dipped headlight module, a high beam module, a light distribution lens and an optical structure. The circuit substrate is connected with the heat dissipation base and provided with a first mounting surface and a second mounting surface relative to the first mounting surface, the dipped headlight module corresponds to the high beam module in position, the dipped headlight module comprises a first light emitting unit arranged on the first mounting surface, the high beam module comprises a second light emitting unit arranged on the second mounting surface, the position of the light distribution lens corresponds to the dipped headlight module and the high beam module, and the optical structure is arranged between the heat dissipation base and the light distribution lens. Therefore, the design requirements of device miniaturization and high illumination efficiency can be met.
Description
Technical Field
The present invention relates to a light projection device, and more particularly to a miniaturized light projection device for illuminating a vehicle lamp.
Background
The car light is equivalent to the eyes of a power vehicle (such as a locomotive or an automobile) and is very important for driving safety. Common vehicular Lamp light sources include halogen lamps, tungsten halogen lamps, HID lamps (High Intensity Discharge Lamp), and the like. In addition, light Emitting Diodes (LEDs) have the advantages of small size, high light emitting efficiency, low power consumption, environmental protection, etc., and can emit light over visible light and invisible light with a significant degree of brightness, so that the technology of using LEDs as light sources of car lamps instead of halogen lamps, halogen tungsten lamps or HID lamps is becoming more and more popular.
For example, TW M539600 and TW M536321 both disclose a lamp device that can be directly mounted on a lamp of a power vehicle. The lamp wick device disclosed in the TW M539600 patent configures an LED light emitting unit to emit light directly toward a lens to generate a low beam light type, and further cooperates an LED light emitting unit with a reflection structure on a vehicle lamp to generate light projected outward to generate a high beam light type, wherein the reflection structure has a paraboloid-like curved surface. In addition, the wick device disclosed in the TW M536321 patent includes two LED light emitting units (i.e., a first LED light emitting unit and a second LED light emitting unit) and a reflection structure, wherein the light emitted from the first LED light emitting unit can be reflected by the reflection structure and projected onto a lens to generate a low beam light type, and the light emitted from the second LED light emitting unit can be reflected by the reflection structure and projected outward to generate a high beam light type, wherein the reflection structure has a curved surface similar to a paraboloid. However, the optical design of the above-mentioned device cannot fully utilize the light generated by the LED light-emitting unit, so that the illumination intensity of the low beam light and the high beam light is not sufficient. Although the number of LED light emitting units can be increased to increase the illumination intensity, this approach cannot satisfy the design requirement of miniaturization.
Referring to the patent No. TW I619624 and patent No. TW I650512 owned by the present applicant, there are also some lampwick devices that change the position of a light guide structure by a driving mechanism to switch a low beam light and a high beam light. However, since the movable member is used in such a device, the overall structure is complicated, the size cannot be further reduced, and the cost of the device is increased; in addition, the use of the moving parts is accompanied by a certain amount of heat generation, which affects the heat dissipation efficiency of the device.
Disclosure of Invention
The present invention is directed to a miniaturized light projection device for providing high-efficiency lighting for a vehicle lamp, which is provided to overcome the shortcomings of the prior art.
In order to solve the above technical problems, one of the technical solutions of the present invention is to provide a miniaturized light projection device, which includes: the light distribution module comprises a heat dissipation base, a circuit substrate, a dipped headlight module, a high beam headlight module, a light distribution lens and an optical structure. The circuit substrate is connected to the heat dissipation base and is provided with a first mounting surface and a second mounting surface opposite to the first mounting surface; the dipped headlight module comprises a first light-emitting unit and a first reflecting unit which are arranged on the first mounting surface and used for reflecting light rays emitted by the first light-emitting unit; the high beam module comprises a first light-emitting unit and a second light-emitting unit which are arranged on the second mounting surface and used for reflecting light rays emitted by the second light-emitting unit, wherein the positions of the second light-emitting unit and the first light-emitting unit are staggered; the positions of the light distribution lenses correspond to the dipped headlight module and the high beam headlight module; the optical structure is arranged between the heat dissipation base and the light distribution lens and used for enabling the light rays reflected by the first reflection unit and the second reflection unit to be projected to the light distribution lens.
Preferably, the optical structure includes a first light guiding portion and a second light guiding portion, the first light guiding portion is made of opaque material and disposed between the circuit substrate and the light distribution lens, the second light guiding portion is made of light-permeable material, and a position of the second light guiding portion corresponds to the high beam module, wherein the light distribution lens has a lens optical axis, an upper surface of the first light guiding portion and an upper surface of the second light guiding portion are both located near the lens optical axis, and a vertical projection of the upper surface of the first light guiding portion partially overlaps with the upper surface of the second light guiding portion.
Preferably, the light distribution lens has a lens aperture between 20 mm and 40 mm.
Preferably, a distance between a lens focal point of the light distribution lens and a first focal point of the second reflection unit is greater than 12 mm and less than 35 mm.
Preferably, the first light emitting unit is located closer to the first light guide part than the second light emitting unit.
Preferably, the first light guide portion is adjacent to the circuit substrate and extends toward a direction close to the light distribution lens, the first light guide portion has a notch, and the second light guide portion is located corresponding to the notch.
Preferably, the first light guide part has an inner edge close to the circuit substrate and an outer edge far away from the circuit substrate, and the outer edge of the first light guide part is adjacent to the upper surface of the second light guide part.
Preferably, the second light guide portion has a light incident surface and a light emitting surface that are parallel to each other, and a distance between the light incident surface and the light emitting surface is between 1 mm and 12 mm.
Preferably, at least one support column is disposed on the upper surface of the second light guide part to support and position the first light guide part.
Preferably, the first light guide part is formed of a thin aluminum sheet having a thickness of less than 1 mm.
Preferably, the upper surface of the second light guide part is inclined by a predetermined angle of 0.5 to 7.5 degrees with respect to the optical axis of the lens.
Preferably, the second light guide part has an inner side edge close to the circuit substrate and an outer side edge far from the circuit substrate, and a shortest horizontal distance between the outer side edge of the second light guide part and the outer side edge of the first light guide part is 0.2 mm to 5 mm.
Preferably, the upper surface of the second light guiding part has a light reflecting layer.
Preferably, the lens optical axis passes through the first light guide part.
Preferably, the heat dissipation base includes a positioning portion, the circuit substrate has a main area and a peripheral area located at one side of the main area, the peripheral area is fixedly connected to the positioning portion, and the main area is exposed out of the positioning portion, wherein the first light emitting unit and the second light emitting unit are both disposed in the main area.
Preferably, the heat dissipation base further includes a heat conduction portion and a plurality of heat dissipation structures, the positioning portion is formed by extending from one end of the heat conduction portion, and the heat dissipation structures are formed by extending from an outer wall of the heat conduction portion.
Preferably, the miniaturized light projection device further comprises an adapter plate, wherein the adapter plate is fixedly connected to the positioning portion and electrically connected to the circuit substrate.
Preferably, the interposer is fixed together with the circuit substrate on an upper surface of the positioning portion.
Preferably, the second reflection unit is a reflector and has a bottom opening, and the second reflection unit has a first focus, wherein a connection line between the first focus of the second reflection unit and a lens focus of the light distribution lens is located near the bottom opening, and a predetermined angle between the connection line and the optical axis of the lens is greater than 0 degree and less than 15 degrees.
Preferably, the light distribution lens has a lens focal point, the position of the lens focal point corresponds to the upper surface of the second light guide part, the second reflection unit has a reflection surface, and the reflection surface of the second reflection unit has a first focal point and defines two reference axes whose positions correspond to a line passing through the first focal point and the lens focal point, wherein the two reference axes define an optical axis of the second reflection unit.
Preferably, the reflecting surface includes a first reflecting curved surface, a second reflecting curved surface and a connecting surface connected between the first reflecting curved surface and the second reflecting curved surface, and a curvature radius of the first reflecting curved surface is different from a curvature radius of the second reflecting curved surface.
Preferably, the first light guide part has two outer reflection regions and a central reflection region located between the two outer reflection regions, the upper surface of the first light guide part includes a first reflection plane, a second reflection plane and a reflection slope connected between the first reflection plane and the second reflection plane, the first reflection plane and the second reflection plane are located in the two outer reflection regions respectively, the first reflection plane is higher than the second reflection plane, and the reflection slope is located in the central reflection region.
Preferably, the second light guide part has two outer optical regions and a central optical region located between the two outer optical regions, the upper surface of the second light guide part includes a first optical plane, a second optical plane and an optical slope connected between the first optical plane and the second optical plane, the first optical plane and the second optical plane are located in the two outer optical regions respectively, the first optical plane is located at a higher position than the second optical plane, and the optical slope is located in the central optical region.
One of the benefits of the present invention is that the miniaturized light projection device provided by the present invention can greatly reduce the size of the device without affecting the illumination intensity by using the technical scheme that the circuit substrate has a first mounting surface and a second mounting surface opposite to the first mounting surface, the low beam module comprises a first light emitting unit arranged on the first mounting surface, the high beam module comprises a second light emitting unit arranged on the second mounting surface, the position of the light distribution lens corresponds to the low beam module and the high beam module, and the optical structure is arranged between the heat dissipation base and the light distribution lens.
For a better understanding of the features and technical content of the present invention, reference should be made to the following detailed description of the invention and accompanying drawings, which are provided for purposes of illustration and description only and are not intended to limit the invention.
Drawings
Fig. 1 is a schematic perspective view of a miniaturized light projection device according to the present invention.
Fig. 2 is another perspective assembly view of the miniaturized light projection device of the present invention.
Fig. 3 is a schematic exploded view of a miniaturized light projection device according to the present invention.
FIG. 4 is another exploded view of the miniaturized light projection device according to the present invention.
FIG. 5 is a schematic perspective cross-sectional view of a miniaturized light projection device according to the present invention.
FIG. 6 is another schematic perspective cross-sectional view of the miniaturized light projection device of the present invention.
FIG. 7 is a schematic plan view of a miniaturized light projection device according to the present invention.
FIG. 8 is a schematic view of a light projection of the miniaturized light projection device according to the present invention.
FIG. 9 is a schematic view of another light projection of the miniaturized light projection device of the present invention.
FIG. 10 is a schematic partial plan view of a miniaturized light projection device according to the present invention.
Fig. 11 is a schematic perspective view of a second reflection unit of a high beam module in a miniaturized light projection device according to the present invention.
Fig. 12 is a schematic perspective view of an optical structure of a miniaturized light projection device according to the present invention.
Fig. 13 is a partially enlarged view of XIII in fig. 7.
FIG. 14 shows another embodiment of the optical structure of FIG. 13.
FIG. 15 is a schematic plan view of an optical structure of a miniaturized light projection device according to the present invention.
Detailed Description
The following description is provided for the purpose of describing the embodiments of the present disclosure, and the present disclosure is not limited to the embodiments of the present disclosure. The invention is capable of other and different embodiments and its several details are capable of modification and various other changes, which can be made in various details within the specification and without departing from the spirit and scope of the invention. The drawings of the present invention are for illustrative purposes only and are not intended to be drawn to scale. The following embodiments will further explain the related art of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are used primarily to distinguish one element from another element or from one signal to another signal. In addition, the term "or" as used herein should be taken to include any one or combination of more of the associated listed items as the case may be.
Referring to fig. 1 to 6, an embodiment of the invention provides a miniaturized light projection device U, which mainly includes: a heat dissipation base 1, a circuit substrate 2, a dipped headlight module 3, a high beam module 4, a light distribution lens 5 and an optical structure 6. The miniaturized light projection device U of the present invention can be applied to a vehicle lamp for illumination to provide a low beam light and a high beam light in compliance with the european vehicle regulation (ECE regulation), but the present invention is not limited thereto.
The relative relationship between the components such as the heat dissipation base 1, the circuit board 2, the low beam module 3, the high beam module 4, the light distribution lens 5, and the optical structure 6 will be described first, and then the implementation of each component and the optical design of the present invention will be further described.
The circuit substrate 2 is connected to the heat dissipation base 1 and is provided with a first mounting surface 21 and a second mounting surface 22 opposite to the first mounting surface 21; the position of the dipped headlight module 3 corresponds to the position of the high beam module 4, wherein the dipped headlight module 3 comprises a first light-emitting unit 31 arranged on the first mounting surface 21, the position of the high beam module 4 comprises a second light-emitting unit 41 arranged on the second mounting surface 22, and the position of the light distribution lens 5 corresponds to the position of the dipped headlight module 3 and the position of the high beam module 4; the optical structure 6 is disposed between the heat dissipation base 1 and the light distribution lens 5.
In the present embodiment, the positions of the first light emitting unit 31 and the second light emitting unit 41 are staggered, and the heat transfer effect is better achieved by dispersing the heat source; the light emitting direction of the first light emitting unit 31 is different from the light emitting direction of the second light emitting unit 41; for example, the light emitting direction of the first light emitting unit 31 is opposite to the light emitting direction of the second light emitting unit 41. When the low beam light module 3, the light distribution lens 5 and the optical structure 6 are matched with each other, a low beam light type can be generated; when the high beam module 4, the light distribution lens 5 and the optical structure 6 are matched with each other, the light type of the high beam can be generated. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention.
It should be noted that, in the miniaturized light projection device U of the present invention, the first light emitting unit 31 and the second light emitting unit 41 are disposed on different surfaces of the same circuit substrate 2, and some special optical designs are used to fully utilize the light emitted by the first light emitting unit 31 and the second light emitting unit 41, so that the size of the device can be greatly reduced without affecting the illumination intensity.
As shown in fig. 7 to 9, the light projected by the low beam module 3 or the high beam module 4 can be transmitted to the light distribution lens 5 through the reflection, refraction and other optical actions of the optical structure 6, and then is projected outward through the light distribution lens 5 to generate a low beam light type or a high beam light type. Further, the optical structure 6 includes a first light guiding portion 61 and a second light guiding portion 62, the first light guiding portion 61 is made of opaque material and is disposed between the circuit substrate 2 and the light distribution lens 5, and the second light guiding portion 62 is made of transparent material and is located corresponding to the high beam module 4; the light distribution lens 5 has a lens optical axis 51 and a lens focal point 52 located on the lens optical axis 51. Note that the first light guide portion 61 and the second light guide portion 62 are at least partially in contact, and the upper surface 610 of the first light guide portion 61 and the upper surface 620 of the second light guide portion 62 are both located in the vicinity of the optical axis of the light distribution lens 5. In some embodiments, a perpendicular projection of the upper surface 610 of the first light guide portion 61 and the upper surface 620 of the second light guide portion 62 coincide with each other.
Referring to fig. 3 to 7, the heat dissipation base 1 serves as a base of the entire device and has good heat conduction and dissipation capabilities. The heat dissipation base 1 includes a heat conduction portion 11, a positioning portion 12 and a plurality of heat dissipation structures 13, wherein the positioning portion 12 is formed by extending from one end (for example, the front end) of the heat conduction portion 11, and the heat dissipation structures 13 are formed by extending from the outer wall of the heat conduction portion 11. The circuit substrate 2 has a main area 2a and a peripheral area 2b located at one side of the main area 2a, wherein the main area 2a is exposed to the positioning portion 12, the first light emitting unit 31 and the second light emitting unit 41 are both disposed in the main area 2a, and the peripheral area 2b is fixedly connected to the positioning portion 12. According to actual needs, the heat dissipation base 1 has a routing channel (not numbered) passing through the heat conduction portion 11 and the positioning portion 12. In an embodiment not shown, a heat dissipation fan (not shown) may be installed on the heat dissipation base 1, so as to achieve a better heat dissipation effect by means of forced convection.
Therefore, the heat dissipation base 1 can effectively remove heat generated by the first light emitting unit 31 and the second light emitting unit 41, thereby improving reliability and service life of the first light emitting unit 31 and the second light emitting unit 41. Further, the heat generated by the first light-emitting unit 31 and the second light-emitting unit 41 can be transferred to the positioning portion 12 through the circuit substrate 2, then transferred to the heat dissipation structure 13 through the heat conduction portion 11, and then dissipated from the heat dissipation structure 13 quickly.
In the present embodiment, the heat dissipation base 1 may be made of a high thermal conductivity metal (such as aluminum), wherein the positioning portion 12 may be a positioning bump, and the peripheral region 2b of the circuit substrate 2 is fixedly connected to the upper surface (not numbered) of the positioning portion 12; the heat conduction portion 11 may be cylindrical, but is not limited thereto; the plurality of heat dissipation structures 13 may be in a shape of a sheet and arranged at intervals on the outer wall of the heat conduction portion 11. However, the number, shape and arrangement of the heat dissipation structures 13 may be changed according to the heat dissipation needs, and the present invention is not particularly limited thereto. In some embodiments, the heat conducting portion 11 and the heat dissipating structure 13 may be made of different materials, so that the heat conducting portion 11 has better thermal conductivity than the heat dissipating structure 13.
The circuit substrate 2 is a metal-based printed circuit board (MCPCB) and has a plurality of circuit layers (not shown); the upper circuit layer may serve as a driving control circuit of the first light emitting unit 31, the lower circuit layer may serve as a driving control circuit of the second light emitting unit 41, and the middle circuit layer may serve as an internal interconnection circuit; the intermediate circuit layer may also provide a thermal conduction path, and the thickness of the intermediate circuit layer may be greater than the thicknesses of the upper and lower circuit layers. In some embodiments, the intermediate circuit layer may be a metal layer having a certain thickness. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention.
In consideration of the manufacturing cost and the electrical conduction path, the miniaturized light projecting device U of the present invention further includes an adapter plate 7, which is also fixedly connected to the positioning portion 12 of the heat dissipation base 1 and electrically connected to the circuit substrate 2 for providing an electrical conduction path for the circuit substrate 2 to go out. In the present embodiment, the interposer 7 is an FR4 printed circuit board, and the interposer 7 and the circuit substrate 2 are fixed together on the upper surface of the positioning portion 12 by locking. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention. In a not shown embodiment, the function of the adapter plate 7 can be integrated into the circuit substrate 2, so that the device can be smaller and the cost can be lower.
Referring to fig. 3 to 7, the low beam light module 3 further includes a first reflecting unit 32 corresponding to the first light emitting unit 31 for reflecting the light emitted by the first light emitting unit 31. Further, the first reflection unit 32 is a reflector and has a reflection surface, which is a multi-curvature compound curved surface, and is illustrated as an ellipsoid in this embodiment.
In the embodiment, the first reflection unit 32 has a first focus 32a and a second focus 32b, the first focus 32a is located in the coverage area of the first reflection unit 32, and the second focus 32b is located outside the coverage area of the first reflection unit 32, but the invention is not limited thereto. And the position of the second focal point 32b corresponds to the optical structure 6; for example, the second focal point 32b is located on the upper surface 620 of the second light guide part 62, as shown in fig. 7. Furthermore, the second focal point 32b is located on the lens optical axis 51 and coincides with the lens focal point 52. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention. In an embodiment not shown, the second focal point 32b of the first reflecting unit 32 may be located near the upper surface 620 of the second light guiding part 62 and may be deviated from the lens optical axis 51 without being coincident with the lens focal point 52.
The first light emitting unit 31 of the low beam module 3 may be a Light Emitting Diode (LED) or a light emitting diode package structure (LED package structure); the first light emitting unit 31 may be mounted on the first mounting surface 21 of the circuit substrate 2 by Surface Mount Technology (SMT), and the first light emitting unit 31 may be disposed on the first focal point 32a of the first reflecting unit 32 or in the vicinity of the first focal point 32 a. In the present embodiment, the first light emitting unit 31 is a light emitting diode package structure and includes at least one light emitting diode chip (not numbered), which is illustrated as three in fig. 3. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention.
The high beam module 4 further includes a second reflection unit 42 corresponding to the second light emitting unit 41 for reflecting the light emitted by the second light emitting unit 41. Further, the second reflection unit 42 is a reflection cover and has a reflection surface; it should be noted that the reflective surface of the second reflective unit 42 is a multi-curvature complex curved surface, which can be generated by optical simulation design. In some embodiments, the reflective surface of the second reflective unit 42 can define two reference axes corresponding to a line passing through the first focal point 42a and the lens focal point 52, and the two reference axes can be respectively located at two sides of the line passing through the first focal point 42a and the lens focal point 52, and can be parallel to or staggered with each other; the two reference axes may define an optical axis of the second reflection unit 42 for controlling the light pattern of the second reflection unit 42, but the invention is not limited thereto. In some embodiments, the reflective surface of the second reflective element 42 may define only one reference axis, which may be located on one side of the line joining the first focal point 42a and the lens focal point 52 or coincident with the line joining the first focal point 42a and the lens focal point 52.
In the embodiment, the second reflection unit 42 has a first focus 42a and defines a light gathering area 42b, the first focus 42a is located in the coverage area of the second reflection unit 42 and the light gathering area 42b is located outside the coverage area of the second reflection unit 42, which is not limited in the disclosure. And the position of the light collection region 42b corresponds to the optical structure 6; for example, the light collecting regions 42b are positioned on the upper surface 620 of the second light guiding part 62, as shown in fig. 7. Further, the lens optical axis 51 passes through the light collection region 42b, and the lens focal point 52 is located within the light collection region 42 b. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention. In an embodiment not shown, the light collecting region 42b of the second reflecting unit 42 can be located near the upper surface 620 of the second light guiding part 62, or a slightly lower region, the lens optical axis 51 can be deviated from the light collecting region 42b, and the lens focus 52 can be located near the light collecting region 42 b. In the present embodiment, the light distribution lens 5 has a lens aperture ranging from 20 mm to 40 mm, and a distance between the lens focal point 52 and the first focal point 42a of the second reflection unit 42 is greater than 12 mm, preferably 15 mm to 35 mm, and more preferably 18 mm to 22 mm.
Referring to fig. 7 and 10, in order to improve the light utilization efficiency, the lens optical axis 51 may be located above the circuit substrate 2, as shown in fig. 7, but is not limited thereto. In addition, the second reflection unit 42 may be disposed to be inclined slightly upward, as shown in fig. 10, so as to fully utilize the light emitted by the second light emitting unit 41; further, the second reflection unit 42 has a bottom opening 420, a connection line between the first focus 42a of the second reflection unit 42 and the lens focus 52 is located near the bottom opening 420, and a predetermined angle θ 4 between the connection line between the first focus 42a of the second reflection unit 42 and the lens focus 52 and the lens optical axis 51 is 0 to 15 degrees.
Referring to fig. 11, according to the light distribution requirement, the reflection surface of the second reflection unit 42 may include a first reflection curved surface 421, a second reflection curved surface 422, and a connection surface 423 connected between the first reflection curved surface 421 and the second reflection curved surface 422, wherein the first reflection curved surface 421 and the second reflection curved surface 422 are each a multi-curvature complex curved surface. The term "multi-curvature complex curved surface" is mainly characterized in that at least one section of the vertical basic line or the horizontal basic line does not meet the requirement of an elliptic curve, namely a2-b2 is not equal to c2, wherein a represents a 1/2 long axis of an ellipsoid, b represents a 1/2 short axis of the ellipsoid, and c represents the distance from the central point of the ellipsoid to a focus. In this embodiment, the connecting surface 423 is a cambered surface with a wide front and a narrow back (the lens direction is taken as the front), and the existence of the connecting surface 423 enables the light expansion effect of the second reflecting unit 42 to be better, so that the high beam mode has better performance; however, the invention is not limited to the connecting surface 423 being a cambered surface with a wide front and a narrow back.
The second light-emitting unit 41 of the high beam module 4 may be a light-emitting diode (LED) or a LED package structure (LED package structure); the second light emitting unit 41 may be mounted on the second mounting surface 22 of the circuit substrate 2 by Surface Mount Technology (SMT), and the second light emitting unit 41 may be disposed on the first focal point 32a of the second reflecting unit 42 or in the vicinity of the first focal point 32 a. In the present embodiment, the second light emitting unit 41 is a light emitting diode package structure and includes at least one light emitting diode chip, which is illustrated as one in fig. 4. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention.
Referring to fig. 3 to 7 and fig. 12 to 14, the first light guiding portion 61 of the optical structure 6 is substantially horizontal and the second light guiding portion 62 is in a standing state, such as a vertical standing state or an oblique standing state, wherein a vertical projection of the upper surface 610 of the first light guiding portion 61 partially overlaps with the upper surface 620 of the second light guiding portion 62. In this embodiment, the upper surface 610 of the first light guide part 61 may have a light reflecting or extinction property according to actual needs. The first light guide part 61 and the second light guide part 62 are mostly located in the coverage area of the first reflection unit 32, and the first light emitting unit 31 is located closer to the first light guide part 61 than the second light emitting unit 41, but not limited thereto; the first light guide portion 61 is a light reflecting plate, which is adjacent to the circuit substrate 2 and extends toward the light distribution lens 5, and the first light guide portion 61 has a notch 614, which is illustrated as an arc notch in fig. 12. In addition, the second light guiding part 62 is a transparent light guiding body, which is disposed at the notch 614 of the first light guiding part 61; the second light guiding portion 62 may be made of polymethyl methacrylate (PMMA) or silicone rubber (silicone rubber), but is not limited thereto.
It should be noted that, in order to improve the light utilization efficiency, the lens optical axis 51 passes through the first light guiding portion 61, and a vertical projection area of the first light guiding portion 61 covers most of the second light guiding portion 62, as shown in fig. 6, but is not limited thereto. In an embodiment not shown, the first light guide part 61 can be located below the optical axis 51 of the lens. And a predetermined angle θ 2 of the upper surface 620 of the second light guiding part 62 slightly inclined with respect to the optical axis 51 of the lens is greater than 0 degrees and less than 10 degrees, preferably approximately 0.5 degrees to 7.5 degrees, as shown in fig. 13. In addition, according to the light distribution requirement, a reflective layer 63 may be covered on the upper surface 620 of the second light guide part 62, as shown in fig. 14; the light reflecting layer 63 may be formed of a high-reflectivity material (e.g., aluminum, silver, etc.), but is not limited thereto. Thereby, the light projected by the low beam lamp module 3 can be prevented from penetrating the second light guide part 62 from the upper surface 620.
Further, the first light guide part 61 has an inner edge (not shown) close to the circuit substrate 2 and an outer edge 61a far from the circuit substrate 2, and the second light guide part 62 also has an inner edge (not numbered) close to the circuit substrate 2 and an outer edge 62a far from the circuit substrate 2, wherein the outer edge 61a of the first light guide part 61 is adjacent to the upper surface 620 of the second light guide part 62, and the shortest horizontal distance between the outer edge 61a of the first light guide part 61 and the outer edge 62a of the second light guide part 62 is 0.2 mm to 5 mm, as shown in fig. 12. In this embodiment, the outer edge 61a of the first light guide part 61 may contact the upper surface 620 of the second light guide part 62, as shown in fig. 13 and 14, but is not limited thereto. In an embodiment not shown, the outer edge 61a of the first light guide part 61 may not contact the upper surface 620 of the second light guide part 62.
Referring to fig. 12 and fig. 15, the first light guiding portion 61 can be formed by stamping a thin aluminum sheet, and has a thickness of 0.1 mm or more and less than 1 mm, preferably 0.2 mm. Two support pillars 626 are integrally formed on the upper surface 620 of the second light guide portion 62 because the first light guide portion 61 is soft and easily deforms; each of the supporting columns 626 has a platform portion 6261 and a positioning portion 6262, wherein the platform portion 6261 has a supporting plane (not numbered) for supporting the first light guide portion 61, and the positioning portion 6262 penetrates through and is fixed to the first light guide portion 61. Thereby, the first light guide part 61 can be stably supported by the second light guide part 62 to be positioned at a predetermined position. It should be noted that, the support columns 626 of the second light guide part 62 can ensure that the deformation of the first light guide part 61 is maintained to a small degree, and the first light guide part 61 is accurately positioned, so as to ensure that the horizontal distance between the outer edge 61a of the first light guide part 61 and the outer edge 62a of the second light guide part 62 is not changed. However, these details are only possible embodiments provided by the present embodiment and are not intended to limit the present invention. In an embodiment not shown, the first light guiding portion 61 and the second light guiding portion 62 can be fixed together by adhesion.
Referring to fig. 12, the optical design of the first light guide portion 61 and the second light guide portion 62 of the optical structure 6 will be described. The upper surface 610 of the first light guide portion 61 and the upper surface 620 of the second light guide portion 62 can jointly define a light pattern and a cut-off line required for low beam illumination, so that the miniaturized light projection device U of the present invention can generate a low beam light pattern that meets vehicle regulations and has a clear cut-off line. Further, the first light guide part 61 has two outer reflective regions (not numbered) and a central reflective region (not numbered) located between the two outer reflective regions; moreover, the upper surface 610 of the first light guiding portion 61 includes a first reflection plane 611, a second reflection plane 612 and a reflection inclined plane 613 connected between the first reflection plane 611 and the second reflection plane 612, wherein the first reflection plane 611 and the second reflection plane 612 are respectively located in the two outer reflection areas, the first reflection plane 611 is higher than the second reflection plane 612, and the reflection inclined plane 613 is located in the central reflection area. Therefore, the miniature light projection device U can generate an asymmetric light type. In an embodiment not shown, to generate a symmetrical light pattern, the upper surface 610 of the first light guide part 61 may include only the first reflection plane 611 and the second reflection plane 612 which are flush with each other.
In addition, the second light guide part 62 also has two outer optical regions (not numbered) and a central optical region (not numbered) located between the two outer optical regions; moreover, the upper surface 620 of the second light guiding portion 62 includes a first optical plane 621, a second optical plane 622, and an optical slope 623 connected between the first optical plane 621 and the second optical plane 622, wherein the first optical plane 621 and the second optical plane 622 are respectively located in the two outer optical areas, the first optical plane 621 is higher than the second optical plane 622, and the optical slope 623 is located in the central optical area. Therefore, the miniature light projection device U can generate an asymmetric light type. In an embodiment not shown, to generate a symmetrical light pattern, the upper surface 620 of the second light guiding part 62 may include only the first optical plane 621 and the second optical plane 622 that are flush with each other.
Referring to fig. 3 to 7, the light distribution lens 5 is fixed to the heat sink base 1 through a lens holder 8, and the first reflection unit 32, the second reflection unit 42 and the optical structure 6 are also fixed to the lens holder 8. Further, the miniaturized light projecting device U of the present invention further includes a mounting unit 9 disposed between the lens holder 8 and the heat dissipation base 1, and the miniaturized light projecting device U can be mounted to a lamp socket structure (not shown) of the vehicle lamp through the mounting unit 9; as for the structure of the mounting unit 9, reference may be made to taiwan patent No. 106137400 of the same applicant, which is not described herein again.
Further, the lens holder 8 includes a frame 81, a connecting structure 82 and two supporting arms 83, wherein the frame 81 is used for carrying the light distribution lens 5, the connecting structure 82 is connected with a main body portion (not numbered) of the mounting unit 9, and the two supporting arms 83 are connected between the frame 81 and the connecting structure 82. In the present embodiment, the housing 81 and the connecting structure 82 are integrally molded with the support arm 83, the light distribution lens 5 is fixed to the housing 81 by an engaging method, and the first reflecting unit 32, the second reflecting unit 42 and the optical structure 6 are fixed to the support arm 83 by a mechanism coupling method. Further, the positioning portion 12 of the heat dissipation base 1 passes through the mounting unit 9 and is fixed together with the connection structure 82 at the front end; the connecting structure 82 may be a sheet and has an opening 820, as shown in fig. 5 and 7, and the circuit substrate 2 extends through the opening 820 from the positioning portion 12, so that the position of the first light emitting unit 31 may correspond to the first reflecting unit 32, and the position of the second reflecting unit 42 may correspond to the second reflecting unit 42.
Referring to fig. 7 to 9, in use, one of the light beams L1 emitted by the first light emitting unit 31 can be reflected by the first reflecting unit 32 to generate a primary reflected light beam L11 to be projected onto the upper surface 610 of the first light guiding portion 61, and the primary reflected light beam L11 can be reflected by the upper surface 610 of the first light guiding portion 61 to generate a secondary reflected light beam L12 to be projected onto the light distribution lens 5 from above the lens optical axis 51, so as to form at least a part of the low beam light type. In addition, another light L2 emitted by the first light-emitting unit 31 can be reflected by the first reflection unit 23 to generate a primary reflected light L21 to be projected onto the upper surface 620 of the second light guide part 62, and at least a part of the primary reflected light L21 can be reflected by the upper surface 620 of the second light guide part 62 to generate a secondary reflected light L22 to be projected onto the light distribution lens 5 from above the lens optical axis 51, so as to finally form at least a part of the low beam light type; and the other part of the primary reflected light L21 may enter the second light guide part 62 from the upper surface 620 and undergo total reflection for multiple times until the light energy is lost, so as to meet the dark space requirement of the low beam light type. In addition, another light L3 emitted by the first light-emitting unit 31 can be reflected by the first reflecting unit 32 to generate a primary reflected light L31, which passes through the hollow area between the second light guide part 62 and the light distribution lens 5 and is projected to the light distribution lens 5 from the lower part of the lens optical axis 51, and finally forms at least a part of the low beam light type.
When in use, one of the light rays L4 emitted by the second light emitting unit 41 can be reflected by the second reflecting unit 42 to generate a primary reflected light ray L41 to be projected to the light incident surface 624 of the second light guiding portion 62, and the primary reflected light ray L41 can generate a primary refracted light ray L42 to be projected to the upper surface 620 of the second light guiding portion 62 through the light incident surface 624 of the second light guiding portion 62; then, the first refracted light beam L42 may pass through the upper surface 620 of the second light guide part 62 to generate a second refracted light beam L43, and the second refracted light beam L43 may be projected from above the lens optical axis 51 to the light distribution lens 5, and finally, at least a part of the high beam lamp type may be formed. In addition, another light ray L5 emitted by the second light-emitting unit 41 can be reflected by the second reflecting unit 42 to generate a primary reflected light ray L51 to be projected to the light incident surface 624 of the second light-guiding portion 62, and the primary reflected light ray L51 can generate a primary refracted light ray L52 to be projected to the upper surface 620 of the second light-guiding portion 62 through the light incident surface 624 of the second light-guiding portion 62; then, the first refracted light ray L52 may be reflected by the upper surface 620 of the second light guide part 62 again to generate a second reflected light ray L53, which is projected from below the lens optical axis 51 to the light distribution lens 5, and finally forms at least a part of the high beam lamp type. In addition, another light L6 emitted by the second light emitting unit 41 can be reflected by the second reflecting unit 42 to generate a primary reflected light L61 to be projected to the light incident surface 624 of the second light guiding portion 62, and the primary reflected light L61 can generate a primary refracted light L62 to be projected to the light emitting surface 625 of the second light guiding portion 62 through the light incident surface 624 of the second light guiding portion 62; then, the first refracted light L62 can pass through the light exit surface 625 of the second light guide part 62 to generate a second refracted light L63, and the second refracted light L63 is projected to the light distribution lens 5 from above the lens optical axis 51, and finally forms at least a part of the high beam light type.
The vertical distance between the light incident surface 624 and the light emitting surface 625 of the second light guiding part 62 is the thickness of the second light guiding part 62, and the thickness is between 1 mm and 12 mm, preferably between 3 mm and 7 mm.
[ advantageous effects of the embodiments ]
One of the benefits of the present invention is that the miniaturized light projection device provided by the present invention can greatly reduce the size of the device without affecting the illumination intensity by using the technical scheme that the circuit substrate has a first mounting surface and a second mounting surface opposite to the first mounting surface, the low beam module comprises a first light emitting unit arranged on the first mounting surface, the high beam module comprises a second light emitting unit arranged on the second mounting surface, the position of the light distribution lens corresponds to the low beam module and the high beam module, and the optical structure is arranged between the heat dissipation base and the light distribution lens.
The above disclosure is only a preferred embodiment of the present invention, and is not intended to limit the scope of the claims, so that all the modifications and equivalents of the technical changes and equivalents using the contents of the present invention and the drawings are included in the scope of the claims.
Claims (21)
1. A miniaturized light projection device, comprising:
a heat dissipation base;
the circuit substrate is connected with the heat dissipation base;
the dipped headlight module comprises a first light-emitting unit and a first reflecting unit which are arranged on the circuit substrate and are used for reflecting the light rays emitted by the first light-emitting unit;
the high beam lamp module comprises a second light-emitting unit and a second reflecting unit which are arranged on the circuit substrate and used for reflecting light rays emitted by the second light-emitting unit, wherein the positions of the second light-emitting unit and the first light-emitting unit are staggered;
the position of the light distribution lens corresponds to the dipped headlight module and the high beam headlight module; and
an optical structure arranged between the heat dissipation base and the light distribution lens for enabling the light rays reflected by the first reflection unit and the second reflection unit to be projected to the light distribution lens,
wherein the optical structure includes a first light guide portion and a second light guide portion, the first light guide portion is made of opaque material and disposed between the circuit substrate and the light distribution lens, the second light guide portion is made of light-permeable material, and the second light guide portion is located at a position corresponding to the high beam module, wherein the light distribution lens has a lens optical axis, an upper surface of the first light guide portion and an upper surface of the second light guide portion are both located near the lens optical axis, and a vertical projection of the upper surface of the first light guide portion partially overlaps with the upper surface of the second light guide portion,
wherein a predetermined angle of inclination of the upper surface of the second light guide part with respect to the optical axis of the lens is between 0.5 degrees and 7.5 degrees; and
the second light guide part is provided with an inner side edge close to the circuit substrate and an outer side edge far away from the circuit substrate, and the shortest horizontal distance between the outer side edge of the second light guide part and the outer side edge of the first light guide part is 0.2-5 mm.
2. The miniaturized light projection device of claim 1 wherein the circuit substrate has a first mounting surface and a second mounting surface opposite the first mounting surface, the first light-emitting unit is disposed on the first mounting surface, and the second light-emitting unit is disposed on the second mounting surface.
3. The miniaturized light projection device of claim 1 wherein the light distribution lens has a lens aperture of between 20 mm to 40 mm.
4. The miniaturized light projection device of claim 1 wherein a distance between a lens focal point of the light distribution lens and a first focal point of the second reflection unit is greater than 12 mm and less than 35 mm.
5. The miniaturized light projecting device of claim 2 wherein the first light emitting unit is located closer to the first light guide portion than the second light emitting unit.
6. The miniaturized light projecting device of claim 2 wherein the first light guide portion is adjacent to the circuit substrate and extends toward the light distribution lens, the first light guide portion has a notch, and the second light guide portion is located corresponding to the notch.
7. The miniaturized light projecting device of claim 2 wherein the first light guide portion has an inner edge close to the circuit substrate and an outer edge away from the circuit substrate, and the outer edge of the first light guide portion is adjacent to the upper surface of the second light guide portion.
8. The miniaturized light projection device of claim 2, wherein the second light guide portion has a light incident surface and a light emitting surface parallel to each other, and a distance between the light incident surface and the light emitting surface is between 1 mm and 12 mm.
9. The miniaturized light projecting device of claim 2 wherein the second light guide portion has at least one support post disposed on the upper surface thereof for supporting and positioning the first light guide portion.
10. The miniaturized light projection device of claim 2, wherein the first light guide part is formed of a thin aluminum sheet having a thickness of less than 1 mm.
11. The miniaturized light projection device of claim 1, wherein the upper surface of the second light guide part has a light reflecting layer.
12. The miniaturized light projecting device of claim 1 wherein the lens axis passes through the first light guide portion.
13. The miniaturized light projection device of claim 1, wherein the heat dissipation base includes a positioning portion, the circuit board has a main area and a peripheral area located at one side of the main area, the peripheral area is fixedly connected to the positioning portion, and the main area is exposed out of the positioning portion, wherein the first light emitting unit and the second light emitting unit are both disposed in the main area.
14. The miniaturized light projection device of claim 13, wherein the heat sink base further comprises a heat conducting portion and a plurality of heat dissipation structures, the positioning portion is formed by extending from one end of the heat conducting portion, and the heat dissipation structures are formed by extending from an outer wall of the heat conducting portion.
15. The miniaturized light projection device of claim 13 further comprising an adapter plate fixedly connected to the positioning portion and electrically connected to the circuit board.
16. The miniaturized light projection device of claim 15 wherein the interposer is fixed to an upper surface of the positioning portion together with the circuit substrate.
17. The miniaturized light projection device of claim 2, wherein the second reflection unit is a reflector and has a bottom opening, the second reflection unit has a first focus, and a predetermined angle between the first focus of the second reflection unit and a lens focus of the light distribution lens is greater than 0 degree and less than 15 degrees, and is located near the bottom opening.
18. The miniaturized light projection device of claim 2, wherein the light distribution lens has a lens focal point, the lens focal point is located corresponding to the upper surface of the second light guide portion, the second reflection unit has a reflection surface, and the reflection surface of the second reflection unit has a first focal point and defines two reference axes located corresponding to a line passing through the first focal point and the lens focal point, wherein the two reference axes define an optical axis of the second reflection unit.
19. The miniaturized light projection device of claim 18 wherein the reflective surface comprises a first reflective curved surface, a second reflective curved surface, and a connecting surface connected between the first reflective curved surface and the second reflective curved surface, and the radius of curvature of the first reflective curved surface is different from the radius of curvature of the second reflective curved surface.
20. The miniaturized light projection device of claim 2, wherein the first light guide portion has two outer reflection regions and a central reflection region located between the two outer reflection regions, the upper surface of the first light guide portion includes a first reflection plane, a second reflection plane and a reflection slope connected between the first reflection plane and the second reflection plane, the first reflection plane and the second reflection plane are respectively located in the two outer reflection regions, the first reflection plane is higher than the second reflection plane, and the reflection slope is located in the central reflection region.
21. The miniaturized light projection device of claim 20 wherein the second light guide portion has two outer optical regions and a central optical region located between the two outer optical regions, the upper surface of the second light guide portion includes a first optical plane, a second optical plane and an optical bevel connected between the first optical plane and the second optical plane, the first optical plane and the second optical plane are respectively located in the two outer optical regions, the first optical plane is located higher than the second optical plane, and the optical bevel is located in the central optical region.
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| CN201910765424.XA CN112393198B (en) | 2019-08-19 | 2019-08-19 | Miniaturized light projection device |
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| CN201910765424.XA CN112393198B (en) | 2019-08-19 | 2019-08-19 | Miniaturized light projection device |
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| CN112393198B true CN112393198B (en) | 2023-03-07 |
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| TWI802455B (en) * | 2022-06-28 | 2023-05-11 | 敏翔股份有限公司 | Vehicle lamp structure |
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