CN208027073U - Micro two-dimensional laser scanning image source and optical projection system - Google Patents
Micro two-dimensional laser scanning image source and optical projection system Download PDFInfo
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- CN208027073U CN208027073U CN201820150156.1U CN201820150156U CN208027073U CN 208027073 U CN208027073 U CN 208027073U CN 201820150156 U CN201820150156 U CN 201820150156U CN 208027073 U CN208027073 U CN 208027073U
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Abstract
The utility model discloses a kind of micro two-dimensional laser scanning image source and optical projection systems.Micro two-dimensional laser scanning image source includes：Laser light source, lens unit, scanning galvanometer unit, display unit and control unit, the lens unit and scanning galvanometer unit are set in turn between the laser light source and display unit, and the laser light source is at least emitting laser beam；Laser beam of the lens unit at least to emit laser light source forms converging beam；The scanning galvanometer unit is at least reflecting the converging beam and be incident on display unit；The display unit at least to receive scanning galvanometer unit reflection converging beam；Described control unit is connect with laser light source and scanning galvanometer unit respectively.The utility model utilizes the image source of two-dimensional scanning mirrors and laser fabrication small size, high-resolution, high brightness, high contrast, and the two-dimension scanning laser image source is applied in fields such as HUD, VR, AR.
Description
Technical field
More particularly to a kind of micro two-dimensional laser scanning image source of the utility model and optical projection system, belong to minute manufacturing technology
Field.
Background technology
Image is most common information carrier in human social activity, and image source is the module for referring to generate image.With
The development of technology, image source application field is more and more extensive.It is needed in car steering field in order to more conveniently, safely drive
By some velocity image presentation of information in front of driver (such as windshield), this system is known as HUD (headup
display)；In fields such as VR (virtual reality), AR (augmented reality), need to wear HMD (head-mounted display, headmount
Display) various image informations are presented in front of human eye；Image source is all had in these HUD and HMD.It is right in different applications
Image source has different requirements, considers that people is needed to wear in VR, AR application, it is desirable to which image source size is small, light, high-resolution, low
Power consumption etc.；The stability, shock resistance, high temperature resistant of consideration system are needed in HUD, and are remained to very in bright, dark situation light
Show image information well.
Common image source has currently on the market：DLP image sources, OLED image sources, LCD image sources etc.；These image sources are initially to apply
It, can be in simple application to HUD, HMD after redesigning downsizing to previous system on TV, projecting apparatus.
DLP (Digital Light Processing) image source technology is the shadow casting technique of Ti companies of the U.S., wherein core
Part is image chip DMD, it is array made of a large amount of tiny mirror arrangements, a picture of each micro mirror correspondence image
Element.Whole system includes mainly light-source system, dmd chip, projection lens, and light-source system often uses the light sources such as LED, xenon lamp, and transports
The light that light source is sent out is homogenized with some optical devices and is incident on dmd chip；By controlling micro mirror in dmd chip
Deflection can obtain the half-tone information of image, after tri- color shade patterns of RGB are superimposed, it can be seen that coloured image；Projection lens
It is made of a series of optical lenses, effect is that dmd chip is imaged to screen, and Fig. 1 illustrates throwings of the LED as light source
Shadow system.
LCD (Liquid Crystal Display) image source is the LCD TV of a miniaturization, can simply be divided into liquid
Crystal panel and backlight module two large divisions.Wherein liquid crystal display panel part includes mainly：Polaroid, colored filter, liquid crystal molecule,
TFT circuit, polaroid, and backlight module includes diffusion barrier, brightness enhancement film, light guide plate and backlight, common backlight is LED；
When to liquid crystal applied voltages, then liquid crystal molecule will be turned to because of distortion changes optically-active state, be similar to numerous small light valves
The gradation of image information of display is controlled, enters liquid crystal layer, subsequent light after the light traverses first layer polaroid that backlight is sent out
Across color filer and second layer polaroid, image can be thus seen on the screen.
OLED (Organic Light Emitting Diodes, Organic Light Emitting Diode) image source can be simply divided into
TFT substrates, luminous organic material and polaroid three parts, substrate generally select transparent glass, glass surface to have one layer of anode
Material, for applying voltage to organic material；When applying voltage to organic material, transition, electricity occur for the electronics of organic molecule
Son discharges light quantum during returning ground state from excitation state transition, to generate visible light.There are tri- kinds of hairs of RGB in each pixel
Light organic material applies voltage swing by control and realizes multicolour pattern output.The above prior art specifically sees " medium and small ruler
Very little OLED is shown and module actuation techniques research, Han Pengfei ", " research of TFT-LCD and OLED image display drop low power consumption method
With realization, Zhuan Yanjian ", " Enabling the Next Generation of Automotive Head-UP Display
Systems, Texas Instruments,DLPA043-October 2013”。
However component is more in DLP image source systems, system is complex, and its light efficiency is using low, power consumption is big, volume
Greatly, it is difficult to apply in head-mounted display, especially under dark situation, it may appear that dim light rectangular area influences visual effect, especially
It has certain security risk when driving at night；LCD needs LED backlights, image information to cannot achieve high contrast.
Dark pixel in LCD is generated by blocking backlight, but light cannot stop completely, when (the example in low ambient light background
As at night), result is exactly to project image other than the information such as necessary speed, and it is (whole to there is also transparent rectangular bright area
Width image size), these luminous rectangles can allow driver distraction's attention and influence observe road information.In addition the longevity of LCD
It orders relatively short；OLED image sources are a kind of novel display technology, higher price；The excitation purity of blue light and feux rouges that OLED is sent out
Not enough, it is difficult to the most true image information of reduction.The service life of OLED is relatively short, as usage time increases, different organic materials
Expect that rate of ageing is different, image discoloration can be caused.The above display light source is broad spectrum light source, needs certain colour filter ability
Narrow spectroscopic light source is obtained, and relatively inefficient.
Utility model content
In view of the deficiencies of the prior art, the main purpose of the utility model is to provide a kind of micro two-dimensional laser scanning pictures
Source and optical projection system, with overcome the deficiencies in the prior art.
For the aforementioned purpose of utility model of realization, the technical solution adopted in the utility model includes：
The utility model embodiment provides a kind of micro two-dimensional laser scanning image source, including：Laser light source, lens list
Member, scanning galvanometer unit, display unit and control unit, the lens unit and scanning galvanometer unit are set in turn in described sharp
Between radiant and display unit, the laser light source is at least emitting laser beam；The lens unit is at least to general
The laser beam of laser light source transmitting forms converging beam；The scanning galvanometer unit is at least reflecting the converging beam simultaneously
It is incident on display unit；The display unit at least to receive scanning galvanometer unit reflection converging beam；The control is single
Member is connect with laser light source and scanning galvanometer unit respectively, and described control unit is at least controlling laser light source and scanning galvanometer
The operating status of unit.
The utility model embodiment additionally provides a kind of optical projection system, including the micro two-dimensional laser scanning image source.
The utility model embodiment additionally provide the micro two-dimensional laser scanning image source or the optical projection system in
The application in the field HUD, HMD, VR, AR.
Compared with prior art, micro two-dimensional laser scanning image source element provided by the utility model is few, light utilization ratio
It is high；The laser power of use is small, low in energy consumption；Additional cooling system is not needed, system structure is simple, small, light；Two
Dimension scanning galvanometer is in resonant condition, low in energy consumption；High contrast and high brightness may be implemented using laser light source, make image bright
It can be observed very well under environment, the MEMS micro mirrors of two-dimensional scan is selected to be imaged, scanning laser light source can only show necessary picture
Prime information, avoiding other regions, there are a small amount of dim lights, and the high contrast of image source image may be implemented, and improve AR, VR, HUD and show
The identification and clarity of information and image.
Description of the drawings
Fig. 1 is to use principle schematics of the LED as the optical projection system of light source in DLP image sources in the prior art；
Fig. 2 is the principle schematic diagram of micro two-dimensional laser scanning image source in one exemplary embodiments of the utility model.
Specific implementation mode
In view of deficiency in the prior art, inventor is able to propose that this practicality is new through studying for a long period of time and largely putting into practice
The technical solution of type.The technical solution, its implementation process and principle etc. will be further explained as follows.
The utility model embodiment provides a kind of micro two-dimensional laser scanning image source, including：Laser light source, lens list
Member, scanning galvanometer unit, display unit and control unit, the lens unit and scanning galvanometer unit are set in turn in described sharp
Between radiant and display unit, the laser light source is at least emitting laser beam；The lens unit is at least to general
The laser beam of laser light source transmitting forms converging beam；The scanning galvanometer unit is at least reflecting the converging beam simultaneously
It is incident on display unit；The display unit at least to receive scanning galvanometer unit reflection converging beam；The control is single
Member is connect with laser light source and scanning galvanometer unit respectively, and described control unit is at least controlling laser light source and scanning galvanometer
The operating status of unit.
Preferably, the laser light source includes for sending out appointing in the semiconductor laser of tri- colors of RGB, optical fiber laser
Meaning is a kind of, but not limited to this.
Further, the scanning galvanometer unit be selected from can be in the speculum that two-dimensional square is swung up.
In some more specific embodiment, the scanning galvanometer unit includes MEMS micro mirrors, the machine of two-dimensional scan
Tool puts any one in the scanning mirror of mirror, the scanning mirror of Piezoelectric Driving and voice coil motor driving, but not limited to this.
In some more specific embodiment, the scanning galvanometer unit includes the first scanning galvanometer and the second scanning
Galvanometer, first scanning galvanometer at least to X-direction formed scan image, second scanning galvanometer at least to
Y direction forms scan image；Wherein described first scanning galvanometer and the second scanning galvanometer are one-dimensional scanning galvanometer.
Preferably, the display unit is selected from microlens array or fiber optics plate.
Further, the micro two-dimensional laser scanning image source further includes：Relay mirror unit, at least adjusting
The light path of the whole converging beam is moved towards, and the converging beam is incident to scanning galvanometer unit.
The utility model embodiment additionally provides a kind of optical projection system, including the micro two-dimensional laser scanning image source.
The utility model embodiment additionally provide the micro two-dimensional laser scanning image source or the optical projection system in
The application in the field HUD, HMD, VR or AR.
Laser scanning image source is a kind of miniaturization laser image source formed based on two-dimensional scanning mirrors, more specific at some
In embodiment, referring to Fig. 2, a kind of micro two-dimensional laser scanning image source includes mainly laser light source 1, optical lens 2, relaying
Speculum 3, the MEMS micromirror 4 of two-dimensional scan and screen 5, laser light source 1 can be semiconductor laser, optical fiber laser etc.；
Colored image source is needed to use RGB tri-color lasers, the spectrum of laser is narrow, and big colour gamut may be implemented, can at color range
Reach 160%NTSC；The light that laser light source 1 is sent out can at least be formed converging beam and converge to screen by optical lens 2
On, the spot size of convergence is image pixel size, and the parameter needs of optical lens are set according to parameters such as pixel sizes
Meter；Relay mirror 3 reduces the volume of system, keeps system more compact, put position its purpose is to adjust light path trend
Setting can change；The MEMS micromirror 4 of two-dimensional scan is a kind of speculum that can be deflected at a high speed, and twin shaft deflection may be implemented,
During the work time, converging beam is reflexed into each location of pixels of image by quickly deflecting, forms required pattern；Screen 5
It is the supporting body of image；Image information can be directly incident upon on the screen of driver's observation (such as glass for vehicle window) by HUD,
A relaying screen carry image information may be needed in the applications such as HUD, VR, AR, laser has good coherence, when making
When using the device of the random reflection such as frosted glass as screen, it may appear that phenomena such as " solar flare ", speckle, and microlens array (or light
Fine fiberboard) it is used as screen that can effectively solve these defects, and can image be imaged onto human eye well, microlens array
Design need to be designed according to the requirement of pixel size and observer, be a kind of preferable laser image source screen.
The principle of laser scanning is realized using the MEMS micromirror of two-dimensional scan：When the light beam sent out from light source, pass through scanning
After the two-dimensional deflection scanning of galvanometer, a two-dimensional bright plane can be formed on imaging screen.Meanwhile according to image color information
Light source (laser) is modulated, so that it may to control the laser beam brightness of any point and color on this two dimensional surface,
The position of laser beam, the modulation in combination with image information to laser, to be imaged are controlled by scanning galvanometer in this way
Point-by-point " drawing " image on screen.
During vibration mirror scanning, when light beam deflects to each pixel, while laser diode current size is controlled, obtained
With the pixel same color.For the region of no pattern color information, laser can be closed and realize full black state, it will not
Generate unnecessary dim light bright area.
Micro two-dimensional laser scanning image source element provided by the utility model is few, and light utilization ratio is high；The laser of use
Power is small, low in energy consumption；Additional cooling system is not needed, system structure is simple, small, light；Two-dimensional scanning mirrors are in
Resonant condition, it is low in energy consumption；High contrast and high brightness may be implemented using laser light source, make image can quilt very well under bright ring border
It observes, the MEMS micromirror of two-dimensional scan is selected to be imaged, scanning laser light source can only show necessary Pixel Information, avoid other
There are a small amount of dim lights in region, and the high contrast of image source image may be implemented, and improve the identification that AR, VR, HUD show information and image
Degree and clarity.
The utility model utilizes two-dimensional scanning mirrors and laser fabrication small size, high-resolution, high brightness, high contrast
Image source, and the two-dimension scanning laser image source is applied in fields such as HUD, VR, AR.
In laser scanning image source, screen selects microlens array or fiber optic fiber plate, can very well be transferred to image information
In human eye, while the generation of speckle is avoided, and laser has good monochromaticjty, is easy to be combined with holography etc..
It should be appreciated that above-described embodiment is only the technical concepts and features for illustrating the utility model, it is ripe its object is to allow
The personage for knowing technique can understand the content of the utility model and implement according to this, can not limit the utility model with this
Protection domain.It is all according to equivalent change or modification made by the spirit of the present invention essence, should all cover in the utility model
Within protection domain.
Claims (8)
1. a kind of micro two-dimensional laser scanning image source, it is characterised in that including：Laser light source, lens unit, scanning galvanometer unit,
Display unit and control unit, the lens unit and scanning galvanometer unit are set in turn in the laser light source and display unit
Between, the laser light source is at least emitting laser beam；The lens unit at least swashs to emit laser light source
Light light beam forms converging beam；The scanning galvanometer unit is at least reflecting the converging beam and be incident on display unit；
The display unit, at least to receive scanning galvanometer unit reflection converging beam；Described control unit respectively with laser light
Source is connected with scanning galvanometer unit.
2. micro two-dimensional laser scanning image source according to claim 1, it is characterised in that：The laser light source includes that can send out
Go out any one in the semiconductor lasers of tri- colors of RGB, optical fiber laser.
3. micro two-dimensional laser scanning image source according to claim 1, it is characterised in that：The scanning galvanometer unit is selected from
It can be in the speculum that two-dimensional square is swung up.
4. micro two-dimensional laser scanning image source according to claim 1 or 3, it is characterised in that：The scanning galvanometer unit
MEMS micromirror, mechanical pendulum mirror, the scanning mirror of Piezoelectric Driving including two-dimensional scan and appointing in the scanning mirror of voice coil motor driving
Meaning is a kind of.
5. micro two-dimensional laser scanning image source according to claim 1, it is characterised in that：The scanning galvanometer unit includes
First scanning galvanometer and the second scanning galvanometer, first scanning galvanometer are described at least to form scan image in X-direction
Second scanning galvanometer is at least in Y direction formation scan image；Wherein described first scanning galvanometer and the second scanning galvanometer
It is one-dimensional scanning galvanometer.
6. micro two-dimensional laser scanning image source according to claim 1, it is characterised in that：The display unit is selected from micro-
Lens array or fiber optics plate.
7. micro two-dimensional laser scanning image source according to claim 1, it is characterised in that further include：Relay mirror list
Member at least to adjust the light path trend of the converging beam, and makes the converging beam be incident to scanning galvanometer unit.
8. a kind of optical projection system, it is characterised in that including the micro two-dimensional laser scanning picture described in any one of claim 1-7
Source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820150156.1U CN208027073U (en) | 2018-01-29 | 2018-01-29 | Micro two-dimensional laser scanning image source and optical projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820150156.1U CN208027073U (en) | 2018-01-29 | 2018-01-29 | Micro two-dimensional laser scanning image source and optical projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208027073U true CN208027073U (en) | 2018-10-30 |
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| CN201820150156.1U Active CN208027073U (en) | 2018-01-29 | 2018-01-29 | Micro two-dimensional laser scanning image source and optical projection system |
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2018
- 2018-01-29 CN CN201820150156.1U patent/CN208027073U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220124 Address after: Room 1702, floor 17, building 11, new generation information technology industrial park, 198 Jialingjiang Road, Suzhou high tech Zone, Suzhou, Jiangsu 215163 Patentee after: Suzhou longmapu Chip Technology Co.,Ltd. Address before: 215123, Suzhou, Jiangsu province Suzhou Industrial Park alone villa lake high Parish, if the waterway 398 Patentee before: SUZHOU INSTITUTE OF NANO-TECH AND NANO-BIONICS (SINANO), CHINESE ACADEMY OF SCIENCES |
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| TR01 | Transfer of patent right |