CN220526166U - Portable vehicle-mounted DLP signal system and vehicle - Google Patents

Abstract

The utility model relates to the field of illumination, and discloses a portable vehicle-mounted DLP signal system and a vehicle, wherein the portable vehicle-mounted DLP signal system comprises: a light source; the focusing lens is arranged on an emergent path of incident light rays emitted by the light source; the light splitting sheet is correspondingly arranged in the light condensing direction of each focusing lens so as to be capable of combining the light rays condensed by the focusing lenses; and a reflecting mirror adapted to receive and refract the light combined via the light splitting sheet; the DMD chip is suitable for receiving the light rays refracted by the reflecting mirror, and the output end of the DMD chip is provided with a projection lens group which is suitable for projecting images displayed by the DMD chip. According to the utility model, the light efficiency of the whole optical system is improved by arranging the fly-eye lenses and the reflecting mirrors, the energy consumption of the whole module is reduced, the cost is saved, and the structure is more compact and portable.

Description

Portable vehicle-mounted DLP signal system and vehicle

Technical Field

The utility model relates to the technical field of illumination, in particular to a portable vehicle-mounted DLP signal system. In addition, the utility model also relates to a vehicle.

Background

DLP (Digital Light Procession) is digital light processing, which is a technique based on digital micromirror element-DMD (Digital MicromirrorDevice) developed by TI (texas instruments) to accomplish the visual digital information display. DLP projection technology employs digital micromirror wafers (DMDs) as the primary key processing element to implement digital optical processing.

The DMD is a projection core imaging device, the main working mode of the DMD chip is that the DMD chip contains millions of micro-mirrors according to different signals transmitted to the CMOS chip by a back-end circuit, an incident light source reflects light rays through rotation of the micro-mirrors, and the larger the deflection angle of the micro-mirrors is, the higher the contrast of an image is, the faster the deflection speed is, and the lower the delay of the image is. Meanwhile, the light absorber absorbs unnecessary light to realize the projection of influence, and the illumination direction is realized by controlling the angle of the micro-lens under the electrostatic action. A DLP projection system with one DMD chip is called a "monolithic DLP projection system" and the light filtered by the color wheel can generate at least 1670 ten thousand colors. The optical effective area of the prior DMD is also greatly enhanced, which can occupy more than 90% of the surface area of the whole chip, thereby effectively improving the optical utilization rate.

The prior art comprises: chinese patent CN217060747U, a linear type DLP micro-projection optical engine, including lighting module, light shaping module, compensation prism, reflection module, wedge prism, DMD chip, right angle prism and projection lens, the light beam is sent by lighting module, after the shaping of light shaping module, by the inclined plane total reflection of compensation prism to reflection module on, reflect to compensation prism again through reflection module to and shine on the DMD chip through wedge prism and right angle prism in proper order, then the light beam reflection of formation of image returns right angle prism, export in the inclined plane total reflection to projection lens through right angle prism.

Chinese patent CN212905879U, DLP micro-projection optical engine with tower optical device, comprising a light combining module, a light condensing module, an RTIR prism module for serial illumination and projection, a DMD light modulator and a telecentric projection lens, wherein the plane of each optical axis of the light condensing module, the RTIR prism module, the DMD light modulator and the telecentric projection lens forms an included angle of 35-60 ° with the plane of the optical axis of the light condensing module. The problems of poor design stability, difficult assembly process and low production yield inherent to the conventional DMD optical modulator lighting optical design framework are solved through the patent application.

However, most DLP projection systems implement transmission and total reflection of the light path by adopting two prisms of a wedge prism and a right angle prism, wherein the two prisms are adhered to each other in pairs, and air gaps exist on two surfaces of the two pairs of prisms, so that additional two prisms are added, the light emergent degree is affected, and larger space is occupied, which is not beneficial to heat dissipation of the element. Meanwhile, the material cost is increased, and the assembly difficulty is improved. In addition, tolerance stack-up is increased, affecting the projection effect of the image.

In view of this, there is a need to design a portable on-board DLP signal system to meet the practical needs.

Disclosure of Invention

In order to solve the technical problems, the first aspect of the utility model provides a portable vehicle-mounted DLP signal system, which can be arranged by fly-eye lenses and reflectors, improves the light efficiency of the whole optical system, reduces the energy consumption of the whole system, saves the cost, and has a more compact and portable structure.

In order to solve the above technical problem, a first aspect of the present utility model provides a portable vehicle-mounted DLP signal system, including:

a light source;

the focusing lens is arranged on an emergent path of incident light rays emitted by the light source;

the light splitting sheet is correspondingly arranged in the light condensing direction of each focusing lens so as to be capable of combining the light rays condensed by the focusing lenses; and

a reflecting mirror adapted to receive and refract the light combined via the light splitting sheet;

the DMD chip is suitable for receiving the light rays refracted by the reflecting mirror, and the output end of the DMD chip is provided with a projection lens group which is suitable for projecting images displayed by the DMD chip.

Preferably, the light source includes an LED G light source, an LED R light source, and an LED B light source.

Still preferably, the focusing lens includes a first focusing lens, a second focusing lens and a third focusing lens, the first focusing lens is respectively and correspondingly disposed on an outgoing path of each light source, the second focusing lens and the second focusing lens are both disposed in a condensing direction of the first focusing lens, the second focusing lens is disposed corresponding to the LED G light source and the LED R light source, and the third focusing lens (6) is disposed corresponding to the LED B light source.

Preferably, the light splitting sheet includes a first light splitting sheet and a second light splitting sheet, the first light splitting sheet is a GB-transparent R-reflective light splitting sheet, the second light splitting sheet is a RG-transparent B-reflective light splitting sheet, the first light splitting sheet is disposed in a light condensing direction of the second focusing lens so as to be capable of combining light collected by the second focusing lens, and the second light splitting sheet is disposed on an exit path of the third focusing lens and the first light splitting sheet so as to be capable of combining light collected by the third focusing lens via the second light splitting sheet and light combined via the first light splitting sheet.

Further preferably, a fly-eye lens and a relay lens are arranged between the second beam splitter and the reflecting mirror in sequence,

the fly-eye lens is suitable for converging the light passing through the second light splitting piece;

the relay lens is suitable for receiving and refracting the light rays converged by the fly-eye lens to the reflecting mirror.

Preferably, a plurality of microlenses are arranged on the DMD chip, and the plurality of microlenses are arranged in an array.

Still preferably, the optical system further comprises a projection lens group, wherein the projection lens group comprises a first projection lens, a second projection lens and a third projection lens, and the first projection lens, the second projection lens and the third projection lens are sequentially arranged on the emergent path of the light.

Preferably, the included angle between the first beam splitter and the second beam splitter is 45 ° relative to the horizontal axis.

Further preferably, the included angle of the reflecting mirror relative to the horizontal axis is 30-60 degrees.

The first aspect of the present utility model provides a vehicle comprising the portable on-board DLP signal system according to the first aspect of the present utility model.

Through the above preferable technical scheme, the portable vehicle-mounted DLP signal system realizes different projection images through the deflection of the DMD chip; the state and the turnover frequency of each micro-mirror of a micro-mirror array of a DMD chip in the DLP signal projection system can be controlled to realize the projected output light type; meanwhile, by controlling the deflection angle of the reflecting mirror, the light rays emitted by the light source can be almost completely focused on the area of the DMD chip after being deflected by the reflecting mirror, so that the whole DMD chip can be completely covered by the light rays.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic diagram of a portable in-vehicle DLP signal system according to an embodiment of the present utility model;

FIG. 2 is an optical path diagram of a portable in-vehicle DLP signal system according to an embodiment of the present utility model;

FIG. 3 is a projected image of a portable in-vehicle DLP signal system at a 0.5m height, 28 ° angle, according to an embodiment of the present utility model.

Reference numerals

1 LED G light source 2 LED R light source

First focusing lens of 3 LED B light source 4

5. Second focusing lens 6 third focusing lens

7. First light-splitting sheet 8 second light-splitting sheet

9. Fly-eye lens 10 relay lens

11 DMD chip 12 field lens

13. First projection lens of reflector 14

15. Second projection lens 16 third projection lens

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured," and "connected" are to be construed broadly, and for example, the term "connected" may be a fixed connection, a removable connection, or an integral connection; either directly or indirectly via an intermediate medium, or in communication with each other or in interaction with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 to 2, the portable vehicle-mounted DLP signal system according to an embodiment of the present utility model includes a light source, a focusing lens, a reflecting mirror 13, and a DMD chip 11, wherein the focusing lens is disposed on an outgoing path of an incident light emitted from the light source; the light splitting sheet is correspondingly arranged in the light condensing direction of each focusing lens so as to be capable of combining the light rays condensed by the focusing lenses; the reflector 13 is suitable for receiving and refracting the light rays combined by the beam splitting sheet, and the surface of the reflector is plated with a multi-layer dielectric film so that the reflectivity of the reflector 13 is higher than 95%; the DMD chip 11 is adapted to receive light incident through the reflector 13 and the field lens 12, and the output end of the DMD chip 11 is provided with a projection lens set adapted to project an image displayed by the DMD chip 11.

Specifically, the light source comprises an LED G light source 1, an LED R light source 2 and an LED B light source 3, the focusing lenses comprise a first focusing lens 4, a second focusing lens 5 and a third focusing lens 6, the LED B light source 3 at the near end uses the first focusing lens 4 and the third focusing lens 6 to collect light beams, the LED G light source 1 at the far end and the LED R light source 2 use the first focusing lens 4 and the second focusing lens 5 to collect light beams, corresponding reflectors are arranged at the output end of the focusing lenses, the reflectors comprise a first light splitter 7 and a second light splitter 8, the first light splitter 7 is a GB light splitter, the second light splitter 8 is a RG light splitter, the first light splitter 7 is arranged in the light collecting direction of the second focusing lens 5 to be capable of combining light beams collected by the second focusing lens 5, the second light splitter 8 is arranged on the third focusing lens 6 and the outgoing path of the first light splitter 7, three different types of light beams can be mixed by the GB light splitter and the RG light splitter, and the second light splitter 8 is sequentially arranged between the second light splitter 8 and a reflector 9 to be suitable for the eyes 9 to be sequentially collected by the reflectors 9; the relay lens 10 is adapted to receive and refract the light converged by the fly-eye lens 9 to the reflecting mirror 13, and the reflecting mirror is capable of reflecting the light onto the DMD chip 11, and entering the projection lens group through the DMD chip 11.

It should be noted that, when the light beams emitted by the LED G light source 1 and the LED R light source 2 pass through the first focusing lens 4 and the second focusing lens 5 to form a converging light beam with a smaller divergence angle, and then reach the GB-transparent R-transparent dichroic film, the G light emitted by the LED G light source 1 is directly transmitted and the R light is reflected to form a beam combining light of the G light and the R light, and as the beam combining light of the G light and the R light continues to propagate rightward, the light beam emitted by the LED B light source 3 passes through the first focusing lens 4 and the third focusing lens 6 to form a converging light with a small divergence angle, and then the RG-transparent R-transparent dichroic film is plated on the RG-transparent R-reflective dichroic film, so that the R light and the G light can directly transmit through the surface, and the B light is reflected at the surface, thereby finally realizing a beam combining light of R, G, B.

More specifically, the projection lens group includes a first projection lens 14, a second projection lens 15, and a third projection lens 16, where the first projection lens 14, the second projection lens 15, and the third projection lens 16 are sequentially disposed on an outgoing path of the light, and F numbers of the plurality of projection lenses are between 2.0 and 3.0, so that all the light in the running state of the DMD chip 11 can be collected.

The DMD chip 11 can receive the incident light reflected by the reflecting mirror 13, the incident light is R, G, B light combined, the output end of the DMD chip 11 corresponds to a group of projection lens groups, and the projection of the image can be realized by controlling the state and the turnover frequency of each micro-reflecting mirror 13 in the micro-mirror array of the DMD chip 11.

Specifically, the included angle of the first beam splitter 7 and the second beam splitter 8 relative to the horizontal axis is 45 degrees, the included angle of the reflecting mirror 13 relative to the horizontal axis is between 30 degrees and 60 degrees, the included angle of the second focusing lens 5 and the third focusing lens 6 relative to the horizontal optical axis X axis is between 70 degrees and 90 degrees, and in the angle range, the distance between lens barrels of each lens group is more than 2mm without interference while reducing the loss of light efficiency. The first light-splitting sheet can reach the intercept of the spectrum position at 580+/-30 nm on the basis of film coating, the spectrum reflectivity of the wavelength above the 580+/-30 nm wave band is more than 95%, and the spectrum transmissivity of the wavelength below the 580+/-30 nm wave band is more than 93%. The second beam splitter 8 can reach a cut-off of a spectral position of 480+/-30 mm on the basis of film coating, the spectral reflectivity of a wave band below 480+/-30 mm is more than 96%, and the spectral transmissivity of the wave band above 480+/-30 mm is more than 94%. The coating curve in the range cuts off the wave band, and can realize that the color temperature is between 4000K and 6000K and higher luminous flux is output.

In addition, the third focusing lens 6 can realize the compensation function of the G light optical path, the combined focal length of the first focusing lens 4 and the second focusing lens 5 is between 3.9 and 6.8mm, the numerical aperture NA is not less than 0.7, the combined focal length of the first focusing lens 4 and the third focusing lens 6 is between 3.7 and 5.3, the numerical aperture NA is not less than 0.7, under the range of adopting the numerical aperture and the combined focal length, the simplicity and the refinement of the light path can be effectively ensured, and meanwhile, higher light-emitting efficiency and excellent projection effect are ensured, and finally, the light-emitting effect shown in fig. 3 is formed.

It should be noted that, by controlling the deflection angle of the reflecting mirror 13, the light emitted by the light source is deflected by the reflecting mirror 13 and then almost totally focused on the micro-mirror array area of the DMD chip 11, so that the whole DMD chip 11 can realize complete light coverage. And the number of lenses adopted by the focusing lens can be two, three or more, so that the F/# of the focusing lens group is lower than 0.5, and the numerical aperture NA of the focusing lens is not less than 0.7, so that the energy of the light source more than 70% can be collected.

And the included angle between the incident light beam and the emergent light beam of the DMD chip 11 is 20-25 °, the inverse angle of the micromirror of the DMD chip 11 is ±12°, the included angle between the incident light beam and the emergent light beam must be greater than 20 °, when the incident light beam angle is increased, it can be reduced that a part of light beam can not enter the projection lens group due to the shielding of the reflector 13, and when the included angle between the incident light beam and the emergent light beam of the DMD chip 11 exceeds 25 °, the light beams in the plurality of focusing lenses are blocked from entering the projection lens group, thereby affecting the light-emitting efficiency of the whole system.

The vehicle of the present utility model, which employs the portable on-board DLP signal system of the present utility model, also has the above-described advantages.

In the description of the present utility model, reference to the terms "one embodiment," "some embodiments," "an implementation," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In the present utility model, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a plurality of simple variants of the technical proposal of the utility model can be carried out, comprising that each specific technical feature is combined in any suitable way, and in order to avoid unnecessary repetition, the utility model does not need to be additionally described for various possible combinations. Such simple variations and combinations are likewise to be regarded as being within the scope of the present disclosure.

Claims (10)

1. A portable on-board DLP signal system, comprising:

a light source;

the focusing lens is arranged on an emergent path of incident light rays emitted by the light source;

the light splitting sheet is correspondingly arranged in the light condensing direction of each focusing lens so as to be capable of combining the light rays condensed by the focusing lenses; and

a reflecting mirror adapted to receive and refract the light combined via the light splitting sheet;

the DMD chip is suitable for receiving the light rays refracted by the reflecting mirror, and the output end of the DMD chip is provided with a projection lens group which is suitable for projecting images displayed by the DMD chip.

2. The portable on-board DLP signal system of claim 1, wherein said light sources include an LED G light source, an LED R light source, and an LED B light source.

3. The portable on-vehicle DLP signal system of claim 2, wherein the focusing lens includes a first focusing lens, a second focusing lens and a third focusing lens, the first focusing lens is disposed on an outgoing path of each of the light sources, the second focusing lens and the third focusing lens are disposed in a light condensing direction of the first focusing lens, the second focusing lens is disposed corresponding to the LED G light source and the LED R light source, and the third focusing lens (6) is disposed corresponding to the LED B light source.

4. The portable on-vehicle DLP signal system of claim 3, wherein the light splitting sheet includes a first light splitting sheet and a second light splitting sheet, the first light splitting sheet is a transmissive GB reflective R light splitting sheet, the second light splitting sheet is a transmissive RG reflective B light splitting sheet, the first light splitting sheet is disposed in a light condensing direction of the second focusing lens so as to be capable of combining light collected by the second focusing lens, and the second light splitting sheet is disposed on an exit path of the third focusing lens and the first light splitting sheet so as to be capable of combining light collected by the third focusing lens via the second light splitting sheet and light combined via the first light splitting sheet.

5. The portable on-board DLP signal system according to claim 4, wherein a fly-eye lens and a relay lens are provided in this order between the second dichroic mirror and the reflecting mirror,

the fly-eye lens is suitable for converging the light passing through the second light splitting piece;

the relay lens is suitable for receiving and refracting the light rays converged by the fly-eye lens to the reflecting mirror.

6. The portable on-board DLP signal system of claim 1, wherein a plurality of microlenses are provided on the DMD chip, the plurality of microlenses being arranged in an array.

7. The portable on-board DLP signal system of claim 1, further comprising a projection lens group including a first projection lens, a second projection lens, and a third projection lens, the first projection lens, the second projection lens, and the third projection lens being sequentially disposed on an exit path of the light.

8. The portable in-vehicle DLP signal system of claim 4, wherein said first and second light splitting segments are angled at 45 ° with respect to a horizontal axis.

9. The portable on-board DLP signal system of claim 5, wherein said mirror is angled between 30 ° and 60 ° with respect to the horizontal axis.

10. A vehicle employing the portable in-vehicle DLP signal system of any one of claims 1 to 9.