CN209944222U - Pixel lighting device and projection imaging module - Google Patents

Abstract

The utility model provides a pixel lighting device and projection imaging module, include: casing, projection imaging lens and constitute the LED light source of pixel by a plurality of LED chips, wherein, the inside accommodation space that has of casing, projection imaging lens with the LED light source all is located in the accommodation space, the LED light source is located projection imaging lens's thing side, the LED light source can change the switch of the arbitrary pixel of self, makes the LED light source forms the luminous image of arbitrary pixel, and will the image passes through projection imaging lens carries out the projection, the utility model provides a pixel lighting device and projection imaging module have solved the vehicle and have gone the in-process, and the interaction is too few with on every side, and current projection system structure is complicated, the technical problem to the availability factor of light source is on the low side.

Description

Pixel lighting device and projection imaging module

Technical Field

The utility model relates to an automobile equipment field especially relates to a pixel lighting device and projection imaging module.

Background

In recent years, with abuse of high beam lights at night, other road participants (vehicles driving in opposite directions/vehicles driving in the same direction/pedestrians) are dazzled or blinded, thereby causing occurrence of traffic accidents and hazards, and unmanned/automatic driving technology is rapidly developing, how to transfer vehicle information or interactive functions to pedestrians, vehicles, etc. in an external driving environment becomes more and more necessary for an automatic driving vehicle, a general vehicle transfers and interacts information with the outside through a vehicle light, for example, a pedestrian and other vehicles are informed of a next traveling direction by a turn signal light, and a latest concept vehicle is a carrier for information expression using the vehicle light, a vehicle front/rear portion, for example, a liquid crystal display panel, an LED (light emitting diode) display panel are integrated at a grille, a rear portion of the vehicle front portion and on a tail light, or a dot matrix projection technology is provided on a front light, in contrast, the projection lighting technology for automobile headlamps has a potential for development because it is a visual information interaction form based on light, and the projection area, distance and experience sense are better than those of a display panel with a limited area.

At present, the car headlight projection technology is similar to the technical scheme of the traditional entertainment video display, and the selection of the projection technology is divided into several categories, namely projection type Liquid Crystal Display (LCD) projection based on the characteristics of a liquid crystal light valve, reflective Liquid Crystal On Silicon (LCOS) projection, DLP projection technology based on the texas instrument company Digital Micromirror (DMD) of a spatial light modulator, projection technology based on a laser scanning galvanometer (Scanner MEMS), and LED light source based on a pixel level, wherein the DLP technology can achieve the highest resolution, and currently, core devices such as a car-level DMD chip, an optical lens, and LED particles are developed late but rapidly, the Scanner MEMS technology projection system is complex, but the MEMS scanning speed can achieve an adjustable resolution, the system efficiency is high, but the market application of the matched MEMS chip, laser diode, and fluorescent panel is not mature, because the inherent temperature characteristic of liquid crystal is not suitable for the working condition of a vehicle, the LCD projection is less researched, and the projection scheme has the defects of high implementation cost, high technical difficulty and the like, so that the pixel-level LED light source scheme is commonly used at present.

However, the existing pixel-level LED light source scheme requires that hundreds to thousands of single LEDs are stacked on an electronic PCB, thereby forming a high-definition lighting scheme, which may cause a large area of the whole light-emitting area, a large size of optical elements and a large module volume, and a complicated control and communication industry of the light source, and when the existing pixel LED light source is applied to the headlamp for projection, although a high angular resolution of a projected pattern of the headlamp can be realized, the projection system is complicated, the utilization efficiency of the light source is only about 30%, and related core devices are not suitable for the working conditions of the vehicle due to the inherent temperature characteristics of the liquid crystal.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a pixel lighting device and projection imaging module carries out the harmless projection of high definition with the figure of formation of LED light source, strengthens vehicle and interaction on every side.

A first aspect of the present invention provides a pixel lighting device, including:

the LED light source comprises a shell, a projection imaging lens and an LED light source, wherein the LED light source is formed by a plurality of LED chips, an accommodating space is formed in the shell, the projection imaging lens and the LED light source are both positioned in the accommodating space, the LED light source is positioned at the object side of the projection imaging lens, and the LED light source can change the switch of any pixel point of the LED light source, so that the LED light source forms a luminous image of any pixel point and projects the image through the projection imaging lens.

Further, the projection imaging lens includes: the optical lens assembly comprises a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence from an object side to an image side, wherein the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, and the fourth lens has positive refractive power.

Further, the first lens comprises a first optical surface and a second optical surface, at least one surface of the first lens is convex and aspheric, the second lens comprises a third optical surface and a fourth optical surface which are convex, the third lens comprises a fifth optical surface and a sixth optical surface which are concave, and the fourth lens comprises a seventh optical surface and an eighth optical surface which are convex.

Further, the number of pixel points forming the LED light source is greater than or equal to 100.

Further, the housing includes: the projection imaging lens comprises a lens barrel, a heat dissipation barrel and a lens support, wherein one end of the lens barrel and one end of the heat dissipation barrel extend into the lens support respectively, one end of the lens barrel penetrates through the lens support and extends into the inside of the heat dissipation barrel, the projection imaging lens is located in the lens barrel, a first lens, a second lens, a third lens and a fourth lens are clamped in the lens barrel according to a preset interval, and the fourth lens is close to one side, facing the outside of the heat dissipation barrel, of the lens barrel.

Furthermore, a lens space ring and a lens pressing ring are further arranged in the lens barrel, the second lens and the third lens are clamped in the lens space ring, and the lens pressing ring is tightly attached to one ends, facing the image side, of the first lens and the fourth lens.

Furthermore, a ring is arranged on the lens pressing ring, the ring is arranged on the inner wall of the lens pressing ring in a surrounding mode, the ring extends from the edge of one end, facing the outer side, of the lens pressing ring to the other end, and the ring is in a step shape gradually rising from the outer side to the inner side.

Further, the LED light source is located in the heat dissipation cylinder, the LED light source is close to the first lens, and the LED light source is located on the object side of the projection imaging lens.

Further, a fan is further arranged in the heat dissipation cylinder and used for dissipating heat of the LED light source and the projection imaging lens.

A second aspect of the present invention provides a projection imaging module, including: the lighting device comprises a camera, a control chip and the pixel lighting device of the first aspect, wherein the camera is used for identifying external image information and feeding back the image information to the control chip, and the control chip is used for controlling the brightness of each pixel point of an LED light source in the pixel lighting device and forming a corresponding pattern.

The utility model provides a pixel lighting device, through including: the LED illumination device comprises a shell, a projection imaging lens and an LED light source with pixel points formed by a plurality of LED chips, wherein the shell is internally provided with an accommodating space, the LED light source and the projection imaging lens are both positioned in the accommodating space, the LED light source is positioned at the object side of the projection imaging lens and is a pixel-level light source formed by a plurality of LED light-emitting chips, each LED light-emitting chip forms a pixel point of the LED light source, the LED light source can change the switch of any pixel point of the LED light source to enable the LED light source to form an image which can emit light by any pixel point, and then the image formed by the LED light source is projected by the projection imaging lens. The structure of the illumination scheme is complex, the projection system of the headlamp is complex, and the utilization efficiency of light from the light source is low.

Drawings

Fig. 1 is a schematic view of an overall structure of a pixel lighting device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a projection imaging lens of a pixel lighting device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a housing of a pixel lighting device according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a connection position of a projection imaging lens of a pixel lighting device according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating an operating state of a lens pressing ring of a pixel lighting device according to an embodiment of the present invention;

fig. 6 is an overall schematic view of a projection imaging module according to a second embodiment of the present invention.

Description of reference numerals:

1-a pixel illumination device;

10-a housing;

20-a projection imaging lens;

30-LED light source;

11-a heat dissipation cylinder;

12-a lens holder;

13-a lens barrel;

14-lens spacer ring;

15-lens clamping ring;

151-loop;

21-a first lens;

22-a second lens;

23-a third lens;

24-fourth lens.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the accompanying drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

The present embodiment provides a pixel illumination device 1, as shown in fig. 1, including: the projection imaging device comprises a shell 10, a projection imaging lens 20 and an LED light source 30, wherein the LED light source 30 is formed by a plurality of LED chips, the projection imaging lens 20 and the LED light source 30 are both located inside the shell 10, a containing space is arranged in the shell 10, the projection imaging lens 20 and the LED light source 30 are located in the containing space, and the LED light source 30 is located on the object side of the projection imaging lens 20.

Specifically, in the present embodiment, the projection imaging lens 20 is a lens for projection, and projects an object located at the object side of the projection imaging lens 20 to the image side, and the LED light source 30 is located at the object side of the projection imaging lens 20, that is, the LED light source 30 is projected through the projection imaging lens 20, and the LED light source 30 is a pixel-level light source, that is, hundreds of small LED light emitting chips are integrated on one LED, each LED light emitting chip is a pixel, all the pixels form the LED light source 30 together, and the LED light source 30 can change the switch of any pixel at will, and by changing the switch of the pixel, the LED light source 30 can present any image.

Optionally, in this embodiment, the LED light source 30 can display various images, so that the pixel lighting device 1 can be used as a headlamp of an automobile, especially, the headlamp of an unmanned vehicle needs to interact with information of pedestrians or other vehicles in addition to the lighting function, the automobile needs to send signals to surrounding pedestrians or vehicles for interaction during the traveling process, when the automobile is driven at night or in poor and dim weather, a message is transmitted to the surroundings through the light, the transmitted message includes a plurality of information that the vehicle needs to turn or reverse, and the surrounding pedestrians and vehicles can determine their own traveling direction and manner through the information, thereby avoiding an accident caused by collision with the vehicle.

Therefore, the LED light source 30 can transmit the image information to the surroundings through the projection imaging lens 20, when the vehicle is about to turn left, the LED light source 30 presents a leftward arrow, and then projects the leftward arrow to represent that the vehicle needs to turn left, of course, the image that the LED light source 30 can present is not limited to the arrow, and by controlling the pixel point switch, the LED light source 30 can present various symbols, such as exclamation marks or numbers, and even can project Chinese characters, and when an emergency occurs in the vehicle, the vehicle can send information to the surroundings for help.

It should be noted that, in the prior art, a vehicle may send a signal to the surroundings through a turn signal lamp, but the direct projection mode in the present application is more intuitive, and with the increase of unmanned vehicles, the information interaction between the unmanned vehicles using projection can expand the range of information to be transmitted, and the transmitted information is not only simple information such as turning and backing, but also more complex information, so as to enhance the interaction between the vehicle and surrounding vehicles as well as pedestrians, and reduce the occurrence of accidents.

Meanwhile, in the present embodiment, the LED light source 30 is not only used for projecting an image, and the projecting image is implemented by controlling the light emitting areas of the pixel points, so that when all the pixel points are in the light emitting state, the LED light source 30 is not distinguished from different car lights, that is, the main body of the pixel lighting device 1 is still used as a car light, but has the function of projecting an image, and moreover, adjusting the light emitting areas of the pixel points can also implement switching between a low beam light and a high beam light, and more importantly, the adjustment of the light emitting areas can optimize the use of the car headlights, when a car is in a day with extremely low visibility such as late night or foggy day, the high beam light needs to be turned on in order to see a distant object clearly, and when the opposite car is in a day, the high beam light can cause a glare situation to a driver of the opposite car, although there, however, in practice, automatic switching cannot be performed in time and when the opposite vehicle passes by continuously, the vehicle is always in a low beam state, and it is difficult to see a distant object clearly.

Therefore, in this embodiment, the above-mentioned problem can be solved through the mode of the luminous region of control to LED light source 30, for example, close the pixel of LED light source 30 first half region totally, only leave the pixel of half region, this will make the car light appear only half bright, and it is dark to leave half, or close the pixel of most region, it is luminous state to only leave the pixel of little region, can understand, close the pixel of the regional opposite side vehicle of front orientation in the car light, and only leave the pixel of the partial region that can not directly shine the opposite side vehicle, make the car light can also guarantee that the car light keeps the distance light when can not causing to dazzle the opposite side vehicle, guarantee to travel safety.

The present embodiment provides a pixel illumination device 1 by including: the LED illumination device comprises a shell 10, a projection imaging lens 20 and an LED light source 30 with pixel points formed by a plurality of LED chips, wherein the shell 10 is internally provided with an accommodating space, the LED light source 30 and the projection imaging lens 20 are both positioned in the accommodating space, the LED light source 30 is positioned at the object side of the projection imaging lens 20, the LED light source 30 is a pixel-level light source and is formed by a plurality of LED light-emitting chips, each LED light-emitting chip forms a pixel point of the LED light source 30, the LED light source 30 can change the switch of any pixel point of the LED light source 30 to enable the LED light source 30 to form an image which is emitted by any pixel point, and then the image formed by the LED light source 30 is projected through the projection imaging lens 20, compared with the prior art, the LED pixel light source can realize regional image projection and high-definition imaging, so that the pixel illumination device 1 can realize high-angle-resolution high-, the technical problems that in the prior art, the structure of an illumination scheme is complex, a projection system of a headlamp is complex, and the utilization efficiency of light of a light source is low are solved.

Optionally, in this embodiment, the projection imaging lens 20 includes: a first lens 21, a second lens 22, a third lens 23, and a fourth lens 24, which are arranged in this order, that is, in order from the object side to the image side of the projection imaging lens 20, wherein the first lens 21 is close to the object side and the fourth lens 24 is open to the image side, the functions of the lenses are different, the first lens 21 has positive refractive power, the second lens 22 has positive refractive power, the third lens 23 has negative refractive power and the fourth lens 24 has positive refractive power, the refractive power of the lenses represents the ability of the lenses to process light, the positive refractive power represents the ability of the lenses to converge incoming light, and the negative refractive power represents the ability of the lenses to diverge the incoming light.

Specifically, in the present embodiment, the first lens 21 is close to the object side and has positive refractive power, the first lens 21 can collect light emitted from the object side, that is, the LED light source 30, that is, the light emitted from the LED light source 30 enters the first lens 21, is collected and enters the second lens 22, the second lens 22 also has positive refractive power, collects light entering the second lens 22 again and emits the collected light to the third lens 23, the third lens 23 has negative refractive power, can diverge light, emits the emitted light to the third lens 23 and emits the divergent light to the fourth lens 24, and the fourth lens 24 has positive refractive power, collects the emitted light and emits the converged light to the image side of the imaging lens 20, thereby completing the projection from the object side to the image side.

In the present embodiment, the lens is generally made of glass, but in order to reduce the weight of the projection imaging lens 20, the fourth lens 24 may be made of plastic, but the first lens 21 must be made of glass, because the first lens 21 is close to the LED light source 30, and the LED light source 30 generates a large amount of heat when emitting light, and in order to ensure that the first lens 21 is not affected, a glass lens is required, and the fourth lens 24 is far from the LED light source 30, so that a plastic lens can be applied, and the materials of the second lens 22 and the third lens 23 may be made of plastic or glass according to actual conditions, but it is required to ensure that the performance of the lens is not affected.

Meanwhile, the first lens 21 is the lens closest to the LED light source 30 and needs to be ensured to have positive refractive power, in order to improve the utilization efficiency of light, so that more light emitted by the LED light source 30 enters the projection imaging lens 20, the first lens 21 needs to have positive refractive power to collect light, and all the projection imaging lens 20 cannot be lenses with positive refractive power, and a lens with negative refractive power needs to be arranged in the second lens 22 or the third lens 23 to balance aberrations, and if all the lenses are positive refractive power, a virtual image or a projected image is distorted, preferably, the third lens 23 is a lens with negative refractive power to balance aberrations in an optical system.

Optionally, in this embodiment, as shown in fig. 2, the first lens 21 includes a first optical surface and a second optical surface, wherein at least one of the first optical surface and the second optical surface is a convex surface and an aspheric surface, the first lens 21 is close to the LED light source 30, and therefore, a convex surface capable of converging light rays is required to enable the LED light rays to enter the first lens 21 as much as possible, the second lens 22 includes a third optical surface and a fourth optical surface which are convex surfaces, the third optical surface and the fourth optical surface continue to function as converging light rays, the third lens 23 includes a fifth optical surface and a sixth optical surface which are concave surfaces and function as diverging light rays, which are mainly used for balancing aberrations in the optical system and avoiding occurrence of distortion virtual images and affecting resolution of a projected image, the fourth lens 24 includes a seventh optical surface and an eighth optical surface which are convex surfaces, the seventh optical surface and the eighth optical surface are close to the image side and play a role of converging light rays to project an image to the image side.

In the present embodiment, it is necessary to ensure that the first lens 21 has an optical surface with at least one convex surface and an aspheric surface, while the other optical surface may be convex or concave, however, the first lens 21 as a whole is a convex mirror, which represents a lens having positive refractive power, and the lens has two optical surfaces, when both are convex, the lens is a convex mirror and when both optical surfaces are concave, the lens is a concave mirror, and one is convex and the other is concave, it should be understood that when one of the first lens elements 21 is convex and the other is concave, the optical surface with the convex surface has a stronger ability to converge light than the concave surface has to diverge light, therefore, the first lens 21 functions to condense light as a whole, and the first lens 21 is a convex mirror.

Optionally, in this embodiment, the number of the pixel points of the LED light source 30 is greater than or equal to 100, the number of the pixel points represents the number of the LED light emitting chips, the larger the number of the pixel points is, the higher the resolution of the image presented by the LED light source 30 is, but the resolution is the original image of the LED light source 30, and the original image needs to be projected through the projection imaging lens 20, however, the higher the resolution of the original image is, the higher the resolution of the projected image is, but the lossless projection needs to be performed in the whole projection process, so that the resolution of the projected image is the same as that of the original image, which needs to ensure that the original image is clear, and therefore, the number of the pixel points of the LED light source 30 is greater than or equal to 100, so as to ensure the clarity of the original.

Alternatively, in the present embodiment, as shown in fig. 3, the housing 10 includes: a lens barrel 13, a heat dissipation cylinder 11 and a lens holder 12, wherein one end of the lens barrel 13 and one end of the heat dissipation cylinder 11 respectively extend into the lens holder 12, the lens holder 12 plays a role of supporting, one part of the lens barrel 13 extends into the heat dissipation cylinder 11, the other part of the lens barrel 13 is left outside the heat dissipation cylinder 11, and the lens holder 12 is located at the junction of the lens barrel 13 and the heat-dissipating cylinder 11, and the lens holder 12 fixes the junction of the lens barrel 13 and the heat-dissipating cylinder 11 from the outside, because the length of the lens barrel 13 itself is long, only a part of the lens barrel 13 extends into the heat dissipation cylinder 11, and the projection imaging lens 20 is placed in the lens barrel 13, so that the weight of the lens imaging lens is heavier, this increases the weight of the lens barrel 13 itself, so that when the lens barrel 13 is partially located inside the heat-dissipating cylinder 11, it is liable to be detached from the heat-dissipating cylinder 11 due to unstable center of gravity, the lens holder 12 is thus used to externally fix the junction of the lens barrel 13 and the heat-dissipating cylinder 11.

Optionally, in this embodiment, as shown in fig. 4, the projection imaging lens 20 is located inside the lens barrel 13, and the first lens 21, the second lens 22, the third lens 23, and the fourth lens 24 in the projection imaging lens 20 are sequentially inserted into the lens barrel 13, where the first lens 21 is located at one end of the lens barrel 13, which extends into the heat dissipation cylinder 11, that is, the innermost side of the lens barrel 13, and the fourth lens 24 is located at one end of the lens barrel 13, which is far away from the heat dissipation cylinder 11, that is, the outermost side of the lens barrel 13.

Optionally, in this embodiment, as shown in fig. 5, the lens barrel 13 includes: a lens pressing ring 15 and a lens spacing ring 14, wherein the lens spacing ring 14 is mainly used for separating adjacent lenses, and the lens pressing ring 15 is mainly used for fixing the lenses and limiting the lenses to move in the lens barrel 13.

Specifically, in this embodiment, the lens spacer 14 and the lens pressing ring 15 are both annular, the transparent spacer is disposed on the outer sides of the second lens 22 and the third lens 23, the outer side of the lens spacer 14 contacts with the inner wall of the lens barrel 13, and the outer edges of the second lens 22 and the third lens 23 contact with the inner side of the lens spacer 14, it can be understood that the lens spacer 14 is padded between the lenses and the lens barrel 13, a preset distance needs to be maintained between the lenses, and the position of the second lens 22 and the position of the third lens 23 can be fixed by using the lens spacer 14, so that the movement of the second lens 22 and the position of the third lens 23 can be prevented from affecting the imaging effect of the lenses.

Specifically, in this embodiment, the structure of the lens pressing ring 15 is similar to that of the transparent spacer and is annular, except that a ring 151 is disposed inside the lens pressing ring 15, the ring 151 is circumferentially disposed on the inner wall of the lens pressing ring 15, and the diameter of the ring 151 gradually decreases from the outer end to the inner end of the lens pressing ring 15, that is, the ring 151 having a gradually decreasing diameter is disposed on the inner wall of the lens pressing ring 15 and extends from the outer end to the inner end of the lens pressing ring 15, so that when the ring 151 is viewed from the outer side to the inner side of the lens pressing ring 15, the ring 151 is in a gradually increasing step shape, and due to the presence of the ring 151, the lens cannot enter the inside of the lens pressing ring 15, and therefore, the lens pressing ring 15 is located in front of the lens.

Specifically, in this embodiment, the lens pressing ring 15 is located in front of the first lens 21 and the fourth lens 24, neither the first lens 21 nor the fourth lens 24 is a smooth plane mirror, but is a convex lens, and the mirror surface itself has a portion protruding forward, so that the protruding portion can enter the ring 151 of the lens pressing ring 15, while the maximum diameter portion of the ring 151 is just clamped at the outer edge of the lens, and the lens pressing ring 15 presses the lens in front of the lens, so as to play a role in fixing, on the other hand, the stepped structure of the lens pressing ring 15 can reduce stray light entering the projection imaging lens 20 from the outside, and improve the effect of projection imaging.

Optionally, in this embodiment, the LED light source 30 is located in the heat dissipation cylinder 11, the LED light source 30, as an object to be projected, needs to be located on the object side of the projection imaging lens 20, the LED light source 30 faces the first lens 21 in the lens barrel 13, and a side of the LED light source 30 where the light emitting pixel points are located faces the first lens 21.

Optionally, in this embodiment, a fan is further disposed in the heat dissipation cylinder 11, and the fan is used for actively dissipating heat, because the LED light source 30 emits a large amount of heat during operation, and the inside of the lens barrel 13 and the inside of the heat dissipation cylinder 11 are both in a relatively closed state, the heat is difficult to dissipate in time, the fan capable of actively dissipating heat needs to be used, and the performance of the lens imaging lens is affected when the heat in the lens barrel 13 is too high.

It should be noted that, in the present embodiment, since the pixel illumination device 1 operates at a high temperature in the operating state, and when the device is cooled, the positions of the lenses are relatively loosened or moved due to thermal expansion and contraction, and the relative positions of the lenses need to be fixed, otherwise the performance of the pixel illumination device 1 is affected, the pixel illumination device is made of materials with similar expansion coefficients, for example, the first lens 21 is made of glass, and the second lens 22, the third lens 23 and the fourth lens 24 can be made of materials with similar thermal expansion coefficients to that of the first lens 21, so as to effectively prevent the projected image from being blurred or the illumination from being reduced.

Example two

The present embodiment provides a projection imaging module, as shown in fig. 6, including: the camera, the control chip and the pixel lighting device 1 provided in the first embodiment are mainly used in a headlamp of a vehicle, the control chip is used for controlling a pixel switch of an LED light source 30 in the pixel lighting device 1, the pixel switch in the area in the LED light source 30 is adjusted according to different conditions, so that the LED light source 30 can form different images, for example, when the vehicle needs to turn, the LED light source 30 forms a left or right arrow through the pixel, when the vehicle needs to interact with surrounding vehicles or pedestrians, the LED light source 30 forms a pattern, a symbol or characters, then the image formed in the LED light source 30 is projected through a projection imaging lens 20, when the projection is not needed, the LED headlamp can be used by a normal vehicle lamp, and the light emitting area of the vehicle lamp can be freely controlled according to road conditions and vehicle conditions.

Specifically, in this embodiment, the camera is used for capturing surrounding conditions and transmitting captured images to the control chip for processing, for example, when a pedestrian is captured, the control chip can control the LED light source 30 to form a special symbol such as an exclamation mark, and project and remind the pedestrian to pay attention to the vehicle, and when the opposite side has a vehicle coming and a vehicle meeting occurs, the camera can control the light emitting area of the LED light source 30 according to the driving position of the opposite side vehicle, so that the pixel point directly irradiating the area where the opposite side vehicle driver is located is turned off, thereby avoiding the situation that the opposite side vehicle driver dazzles the vehicle lamp when meeting, on one hand, avoiding accidents, and on the other hand, ensuring that the light emitting area of the vehicle lamp can illuminate the road ahead, so that the vehicle lamp can be always in a high beam state without switching between low beam and high beam back and forth when meeting, the utilization efficiency of the light beam for lighting is improved to the maximum extent, and the requirements on high beam and remote visualization are met when a driver drives at night with a poor visual field, so that the vehicle lamp can assist the driver to drive to the maximum extent.

The projection imaging module that this embodiment provided can be applied to the headlamp of vehicle, carry out image acquisition to information on every side through the camera, control chip carries out analysis and control LED light source 30 to form various figure projections or ordinary car light to use to the image of gathering, especially when traveling at night, strengthen the vehicle and the visual supplementary driving of interaction and light on every side, and simultaneously, moreover, the steam generator is simple in structure, and stability is good, and is higher to LED light source 30's utilization ratio, can carry out the lossless projection, and has the value of using widely.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A pixel illumination device, comprising:

the LED light source comprises a shell, a projection imaging lens and an LED light source consisting of a plurality of LED chips, wherein each LED chip forms one pixel point of the LED light source, a containing space is arranged inside the shell, the projection imaging lens and the LED light source are both positioned in the containing space, the LED light source is positioned at the object side of the projection imaging lens, and the LED light source can change the switch of any pixel point of the LED light source, so that the LED light source forms a luminous image of any pixel point and projects the image through the projection imaging lens.

2. The pixel illumination device according to claim 1, wherein the projection imaging lens comprises: the optical lens assembly comprises a first lens, a second lens, a third lens and a fourth lens which are arranged in sequence from an object side to an image side, wherein the first lens has positive refractive power, the second lens has positive refractive power, the third lens has negative refractive power, and the fourth lens has positive refractive power.

3. The pixel illumination device of claim 2, wherein the first lens comprises a first optical surface and a second optical surface, at least one of the first optical surface and the second optical surface being convex, the second lens comprises a third optical surface and a fourth optical surface, the third optical surface and the fourth optical surface are both convex, the third lens comprises a fifth optical surface and a sixth optical surface, the fifth optical surface and the sixth optical surface are both concave, the fourth lens comprises a seventh optical surface and an eighth optical surface, and the seventh optical surface and the eighth optical surface are both convex.

4. The pixel illumination device of claim 3, wherein the number of pixel points of the LED light source is greater than or equal to 100.

5. The pixel illumination device according to claim 4, wherein the housing comprises: the lens barrel comprises a lens barrel, a heat dissipation cylinder and a lens support, wherein the second end of the lens barrel and the first end of the heat dissipation cylinder extend into the lens support respectively, the second end of the lens barrel extends into the inside of the heat dissipation cylinder from the first end of the heat dissipation cylinder, the first end of the lens barrel and the second end of the heat dissipation cylinder are located outside the lens support, the projection imaging lens is located in the lens barrel, the first lens, the second lens, the third lens and the fourth lens are clamped in the lens barrel according to a preset interval, and the fourth lens is close to the lens barrel and faces one side of the outside of the heat dissipation cylinder.

6. The pixel illumination device according to claim 5, wherein a lens spacer and a lens pressing ring are further disposed in the lens barrel, wherein the second lens and the third lens are clamped in the lens spacer, and the lens pressing ring is tightly attached to ends of the first lens and the fourth lens facing the image side.

7. The pixel illumination device according to claim 6, wherein the lens pressing ring is provided with a ring which is circumferentially arranged on an inner wall of the lens pressing ring and extends from a rim of the lens pressing ring towards one end of the outer side to the other end, and the ring is gradually stepped from the outer side to the inner side.

8. The pixel illumination device according to claim 7, wherein the LED light source is located inside the heat dissipation cylinder, and the LED light source is located on an object side of the projection imaging lens.

9. The pixel illumination device according to claim 8, wherein a fan is further disposed in the heat dissipation cylinder for dissipating heat from the LED light source and the projection imaging lens.

10. A projection imaging module, comprising: the pixel lighting device of any one of the above claims 1-9, wherein the camera is configured to recognize external image information and feed back the image information to the control chip, and the control chip is configured to control the brightness of each pixel of the LED light source in the pixel lighting device, so that the LED light source displays a pattern corresponding to the image information.

Images