CN103852892A - Head-up display system based on laser light source - Google Patents
Head-up display system based on laser light source Download PDFInfo
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Abstract
The invention relates to a laser projection display technique, and provides a head-up display system based on a laser light source. The head-up display system comprises a laser light source component, a light source control unit, a light intensity sensor, a display chip, a display chip control unit, a system control unit and a transparent screen, wherein the transparent screen is made of a transparent medium doped with at least three nano grains of different particle sizes; the nano grain of each particle size has a fixed resonance rayleigh scattering wavelength; the wavelengths correspond to the lighting wavelengths of the laser light source one to one; each kind of laser can form resonance rayleigh scattering on the screen, so as to form practical images. The head-up display system has the characteristics of wide visible range, simple optical design, vivid color and the like, the optical energy utilization rate of the light source is high.
Description
Technical field
The present invention relates to laser projection display technology, relate in particular to a kind of head-up-display system based on LASER Light Source.
Background technology
Vehicle-mounted head-up-display system (Head-Up Display, HUD), claim again head-up display system, it is a kind of display system being shown on shield glass, for display automobile speed, rotating speed, oil consumption and navigation information etc., driver need not bow and can be observed many information of vehicle, the traffic safety hidden danger that may exist while avoiding driver to bow watching panel board information.HUD polygamy is placed in high-end automotive interior at present.
Common HUD system is coated with or attaches the film that layer of surface reflectivity is higher on shield glass inside surface, the light casting out for reflecting glass below optical projection system, the image that this type systematic becomes is the virtual image, generally only have driver can be observed, the passenger who is sitting in co-driver cannot observe the image of HUD.In HUD, common reflectance coating is by the medium composition of high index of refraction, and light transmission is about 70% left and right, and surface reflectivity is more than 20%.As the windshield before automobile, requiring has a very high transmissivity, and as the reflectance coating of HUD, need to have high reflectivity, and this and shield glass are contradiction to the requirement of transmittance.Because needs are taken into account transmissivity and reflectivity, the light utilization efficiency of existing HUD system is all very low, therefore just requires optical projection system to have the light output of high brightness, and the design and fabrication of optical projection system is had higher requirement.
The optical module of existing head-up display carries out work with collimation principle, be positioned at as the plane of image source on the focal plane of optical system, if image source plane has departed from the focal plane of optical system, the boresight that same character point provides is not parallel, will cause parallax.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of head-up-display system based on LASER Light Source, and being intended to solve the image that in prior art, head-up-display system becomes is the virtual image, and the narrow problem of visual range.
The present invention is achieved in that a kind of head-up-display system based on LASER Light Source, comprising: LASER Light Source assembly, light source control unit, light intensity sensor part, display chip, display chip control module, system control unit and transparent screen;
Described LASER Light Source assembly is for generation of many primary colours laser that can be mixed into white light;
Described light intensity sensor part is used for surveying the light intensity of surrounding environment, and light intensity data is fed back to described light source control unit;
Described light source control unit is used to described LASER Light Source assembly that power supply is provided, and sends control signal according to the light intensity data of described light intensity sensor part feedback to described LASER Light Source assembly, controls the output power of adjusting light source;
Described display chip control module is used to described display chip that power supply is provided, simultaneously also for the signal that drives display chip and the displays image information of controlling described display chip are provided;
Described display chip is modulated for many primary colours laser that LASER Light Source assembly is produced, and makes described many primary colours laser carry the above displays image information;
Described system control unit is connected with described light source control unit, described display chip control module respectively, for coordinating work between light source control unit, described display chip control module and described light intensity sensor part and the transmission of data, also for carrying out data communication with the external world;
Described transparent screen is for the many primary colours laser imaging for after described display chip modulation.
Further, described head-up-display system also comprises dodging device and optical system;
Described dodging device is positioned over before described LASER Light Source assembly, expands processing, homogenize processing, the processing of dissipation spot and collimation process for the incident beam that LASER Light Source assembly is sent;
Described optical system is placed between described display chip and described transparent screen, for adjusting from described display chip light beam out, and makes the light beam imaging on described transparent screen after adjustment.
Further, described LASER Light Source assembly is by the laser constitution of at least three kinds of different base colors.
Further, described LASER Light Source assembly comprises red laser diode, green semiconductor laser and blue semiconductor laser.
Further, described display chip is digital micromirror display chip, silicon base liquid crystal display chip or transmissive liquid crystal display chip.
Further, described transparent screen is mixed with nano particle.
Further, described nano particle is made up of the nano particle of multiple different size, and various nano particles have the Resonance Rayleigh Scattering wavelength of each self-retaining, and the sharp light wavelength producing with LASER Light Source assembly is respectively corresponding one by one; The kernel of described nano particle is made up of nonmetallic materials, and skin is wrapped up by metal level nano particle.
Further, described transparent screen is the film that is attached at internal surface of car windscreen.
Further, described head-up-display system also comprises:
Light source intensity Auto-Sensing and compensating module, be placed on described dodging device, for detecting the light intensity of the many primary colours laser receiving from described LASER Light Source assembly, and light intensity data is sent to described light source control unit, by described light source control unit, many primary colours laser is carried out to light intensity compensation;
Luminance sensor, is placed on described dodging device, for detection of the brightness of the many primary colours laser receiving, and brightness data is sent to described light source control unit, by described light source control unit, many primary colours laser is carried out to brightness regulation;
Color sensor, is placed on described dodging device, for detection of the color of many primary colours laser, and color data is sent to described light source control unit carries out the adjustment of color balance.
The present invention compared with prior art, beneficial effect is: head-up-display system of the present invention can present real image on transparent screen, and have that real image is bright-colored, visual range is wide, screen transparency is high and light source utilization factor high, also taken into account the performance requirement such as transmittance of brightness of image, light source power consumption, transparent screen simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of head-up-display system of the present invention;
Fig. 2 is the luminescent spectrum of three kinds of LASER Light Source in head-up-display system of the present invention;
Fig. 3 is the transparent screen of nano particle of having adulterated.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Along with the progress of laser technology, the optical projection system using laser as light source is released successively, has therefore also become laser as light source into reality for head-up-display system.As described in Figure 1, for the present invention's one preferred embodiment, based on a head-up-display system for LASER Light Source, this head-up-display system comprises: LASER Light Source assembly 100, light source control unit 104, light intensity sensor part 105, display chip 109, display chip control module 108, system control unit 106 and transparent screen 112.LASER Light Source assembly 100 can be mixed into many primary colours laser of white light for sending generation.Light intensity sensor part 105 is connected with light source control unit 104, for surveying the light intensity of surrounding environment, and light intensity data is fed back to light source control unit 104.Light source control unit 104 is connected with LASER Light Source assembly 100, be used to LASER Light Source assembly 100 that power supply is provided, and the light intensity data feeding back according to light intensity sensor part 105 sends control signal to LASER Light Source assembly 100, the output power of control adjustment light source.Display chip control module 108 is connected with display chip 109, is used to display chip 109 that power supply is provided, and also drives the signal of display chip 109 and controls the image information that display chip 109 shows for providing simultaneously.Display chip 109 is modulated for many primary colours laser that LASER Light Source assembly is produced, and makes described many primary colours laser carry the above displays image information.Particularly, the laser of various primary colours outputs to its laser beam respectively on each self-corresponding display chip 109, the laser of various primary colours, after converging, adds image information simultaneously, and the laser beam being penetrated by display chip 109 is the light beam modulating and carry image information.System control unit 106 is connected with light source control unit 104, display chip control module 108 respectively, for coordinating work between light source control unit 104, display chip control module 108 and light intensity sensor part 105 and the transmission of data, also for carrying out data communication with the external world.Transparent screen 112 is for the many primary colours laser imaging for after display chip 109 modulation.
At the head-up-display system based on LASER Light Source of the present invention, reflection or the scattering of image-forming principle based on screen surface, light focusing is in screen surface, and the screen with rough surface can or scatter to all directions by light reflection, thereby forms image.Common opaque mask is mainly to be reflected into master, and if desired imaging in transparent medium needs light to carry out scattering, and this head-up-display system has mainly been applied scattering of light principle.Light scattering refers to when light beam passes through transparent medium, the optical phenomenon that can observe in all directions beyond incident direction, and it is a kind of form of expression of electromagnetic radiation and matter interaction.Light scattering is relevant with the size and geometric of medium unevenness and particle.Because difference, the incident wavelength of particle size and shape are different with scattered light wavelength, the light scattering that can produce number of different types.When particle diameter in medium is during much larger than incident wavelength, the scattering of generation is reflection and refraction; When particle diameter and lambda1-wavelength are close in medium, produce Tyndall scattering; When in medium, particle diameter is less than lambda1-wavelength, just can produce take Rayleigh scattering as main molecular scattering.Under normal conditions, the intensity of Rayleigh scattering is very weak, only have Rayleigh scattering wavelength to equal or during close to molecular absorption band, because Electron absorption wave frequency is identical with scattering frequency, electronics sharply strengthens scattering strength because resonating, this phenomenon is referred to as resonance and strengthens Rayleigh scattering, is called for short Resonance Rayleigh Scattering.In general Resonance Rayleigh Scattering, association has secondary scattering and the anti-secondary scattering at 2 times of incident wavelengths and 1/2 place, and some nonlinear scattering phenomenons, is referred to as Resonance Rayleigh Scattering.Transparent screen 112 is formed by the transparent medium of the nano particle doped with at least three kinds of different-grain diameters, the nano particle of every kind of particle diameter has the Resonance Rayleigh Scattering wavelength of fixed wave length, this wavelength is corresponding one by one with the emission wavelength of LASER Light Source, each laser can form Resonance Rayleigh Scattering on screen, thus imaging.Except three kinds of sharp light wavelengths, the light of other wavelength in visible-range is in the time seeing through screen, cannot on screen, form effective Resonance Rayleigh Scattering, therefore light can see through screen along former incident direction, so screen is transparent for this part light.
Due to the use of laser, in projector, inner each interface reflex time can produce harmful striated hot spot, is commonly referred to as speckle.The reason that speckle produces is that the phase place on time and space mutually superposes and causes because laser has very strong monochromaticity and coherence, therefore must eliminate the coherence of laser.In the present invention, weaken or the method for eliminating laser coherence can take the mode of mechanical shock LASER Light Source or Laser Transmission device to realize.Therefore, described head-up-display system also comprises dodging device 107 and optical system 110.Dodging device 107 is positioned over before LASER Light Source assembly 100, the incident beam that LASER Light Source assembly 100 sends enters in dodging device 107, dodging device 107 expands processing, homogenize processing, the processing of dissipation spot and collimation to incident beam and processes, the dissipate processing of spot, to guarantee that speckle does not appear in picture on screen.Optical system 110 is placed between display chip 109 and transparent screen 112, for adjusting from display chip 109 light beam out, and makes the light beam imaging on transparent screen 112 after adjustment.
LASER Light Source assembly 100 is by the laser constitution of multiple different base colors.Preferably, LASER Light Source assembly 100 is the smaller and more exquisite semiconductor laser of volume ratio, and by the laser constitution of three kinds of primary colours, be respectively red laser diode 101, green semiconductor laser 102 and blue semiconductor laser 103, the luminescent spectrum of the LASER Light Source that these three kinds of laser instruments send as shown in Figure 2.Three laser instruments provide power supply and control signal by light source control unit 104, and light source control unit 104, for adjusting the light output of three laser instruments, is realized the adjusting of brightness regulation and color balance.When light intensity sensor part 105 detects surrounding environment light when more weak, the signal that light source control unit 104 feeds back according to light intensity sensor part 105, turn down the light output of red laser diode 101, green semiconductor laser 102 and blue semiconductor laser 103, thereby turn down the brightness of display frame, protection observer's eyesight; When light intensity sensor part 105 detects surrounding environment light when more intense, the signal that light source control unit 104 feeds back according to light intensity sensor part 105, heighten the light output of red laser diode 101, green semiconductor laser 102 and blue semiconductor laser 103, make the brightness of display frame brightness higher than background frame, to guarantee the clear of picture.
Because transparent screen 112 imagings are real image, and light is scattered to all directions, and therefore observer 113 can observe become image in any angle.Transparent screen 112 can be made into film and be attached at shield glass inside surface under normal circumstances, and transparent screen 112 is unsuitable blocked up, and the increase of thickness can cause image blur, and sharpness reduces.
From car, be incident to the ambient light in car, its spectrum is continuous spectrum, in the time seeing through transparent screen 112, only there is the light of three fixed wave length to be scattered, and because the scattering spectrum width of nano particle 111 is very narrow, the light ray energy being scattered is considerably less, and naked eyes cannot be told the variation of surround lighting through transparent screen 112 rear generations substantially, and therefore transparent screen 112 surround lighting is to external world transparent.
In the present invention, owing to adopting the primary colours laser of different wave length, on color, there is the problem of balance, in order to address these problems, can also on dodging device 107, increase light source intensity Auto-Sensing and compensating module, luminance sensor and color sensor, light intensity is detected and carried out Light Source Compensation in conjunction with light source control unit 104 according to light source intensity Auto-Sensing and compensating module, while is in conjunction with the feedback of luminance sensor and color sensor, light source control unit 104 can be adjusted each primary colours laser output power, can make the output light of LASER Light Source be mixed into white light.
Using the red, green, blue tricolor laser device of different wave length is one of one embodiment of the present of invention, will be understood that, uses the made head-up-display system of more than three kinds primary colours laser also to belong to scope described in the invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the head-up-display system based on LASER Light Source, is characterized in that, comprising: LASER Light Source assembly, light source control unit, light intensity sensor part, display chip, display chip control module, system control unit and transparent screen;
Described LASER Light Source assembly is for generation of many primary colours laser that can be mixed into white light;
Described light intensity sensor part is used for surveying the light intensity of surrounding environment, and light intensity data is fed back to described light source control unit;
Described light source control unit is used to described LASER Light Source assembly that power supply is provided, and sends control signal according to the light intensity data of described light intensity sensor part feedback to described LASER Light Source assembly, controls the output power of adjusting light source;
Described display chip control module is used to described display chip that power supply is provided, and also drives the signal of display chip and controls the image information that described display chip shows for providing simultaneously;
Described display chip is modulated for many primary colours laser that LASER Light Source assembly is produced, and makes described many primary colours laser carry the above displays image information;
Described system control unit is connected with described light source control unit, described display chip control module respectively, for coordinating work between light source control unit, described display chip control module and described light intensity sensor part and the transmission of data, also for carrying out data communication with the external world;
Described transparent screen is for the many primary colours laser imaging for after described display chip modulation.
2. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described head-up-display system also comprises dodging device and optical system;
Described dodging device is positioned over before described LASER Light Source assembly, expands processing, homogenize processing, the processing of dissipation spot and collimation process for the incident beam that LASER Light Source assembly is sent;
Described optical system is placed between described display chip and described transparent screen, for adjusting from described display chip light beam out, and makes the light beam imaging on described transparent screen after adjustment.
3. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described LASER Light Source assembly is by the laser constitution of at least three kinds of different base colors.
4. the head-up-display system based on LASER Light Source according to claim 3, is characterized in that, described LASER Light Source assembly comprises red laser diode, green semiconductor laser and blue semiconductor laser.
5. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described display chip is digital micromirror display chip, silicon base liquid crystal display chip or transmissive liquid crystal display chip.
6. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described transparent screen is mixed with nano particle.
7. the head-up-display system based on LASER Light Source according to claim 6, it is characterized in that, described nano particle is made up of the nano particle of multiple different size, various nano particles have the Resonance Rayleigh Scattering wavelength of each self-retaining, and the sharp light wavelength producing with LASER Light Source assembly is respectively corresponding one by one; The kernel of described nano particle is made up of nonmetallic materials, and skin is wrapped up by metal level nano particle.
8. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described transparent screen is the film that is attached at internal surface of car windscreen.
9. the head-up-display system based on LASER Light Source according to claim 1, is characterized in that, described head-up-display system comprises:
Light source intensity Auto-Sensing and compensating module, be placed on described dodging device, for detecting the light intensity of the many primary colours laser receiving from described LASER Light Source assembly, and light intensity data is sent to described light source control unit, by described light source control unit, many primary colours laser is carried out to light intensity compensation;
Luminance sensor, is placed on described dodging device, for detection of the brightness of the many primary colours laser receiving, and brightness data is sent to described light source control unit, by described light source control unit, many primary colours laser is carried out to brightness regulation;
Color sensor, is placed on described dodging device, for detection of the color of many primary colours laser, and color data is sent to described light source control unit carries out the adjustment of color balance.
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| CN104614849A (en) * | 2015-02-12 | 2015-05-13 | 贵州景浩科技有限公司 | Highlight lens system for gunsight and gunsight |
| CN105388613A (en) * | 2014-08-28 | 2016-03-09 | 罗伯特·博世有限公司 | Image generation equipment, head-up display and method for generating image |
| CN106324839A (en) * | 2016-10-18 | 2017-01-11 | 孙绪刚 | Vehicle-mounted head-up display system based on transparent imaging glass |
| CN107102442A (en) * | 2017-06-23 | 2017-08-29 | 江苏泽景汽车电子股份有限公司 | A kind of HUD automatic brightness regulating device and method |
| CN107850786A (en) * | 2015-09-10 | 2018-03-27 | 富士胶片株式会社 | Projection display device and method for controlling projection |
| CN109425592A (en) * | 2017-08-31 | 2019-03-05 | 清华大学 | A kind of observation device of monodimension nanometer material |
| CN112331079A (en) * | 2020-11-06 | 2021-02-05 | 京东方科技集团股份有限公司 | Display panel and display device |
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Effective date of registration: 20230703 Address after: 22nd Floor, Building C2, Zhiyuan, No. 1001 Xueyuan Avenue, Taoyuan Street, Nanshan District, Shenzhen, Guangdong Province, 518000 Patentee after: Shenzhen Shidai Huayun Technology Development Co.,Ltd. Address before: 518000 22 / F, building C2, Nanshan wisdom garden, 1001 Xueyuan Avenue, Nanshan District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN TIMEWAYING TECHNOLOGY Co.,Ltd. |
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