CN208255596U - A kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light - Google Patents
A kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light Download PDFInfo
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- CN208255596U CN208255596U CN201820833500.7U CN201820833500U CN208255596U CN 208255596 U CN208255596 U CN 208255596U CN 201820833500 U CN201820833500 U CN 201820833500U CN 208255596 U CN208255596 U CN 208255596U
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Abstract
The utility model discloses a kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light, including backlight module, liquid crystal display panel and liquid crystal display drive circuit, after liquid crystal display drive circuit is powered, infrared laser fluorescent tube issues the infrared laser of scattering through down polaroid, the direction of vibration infrared light vertical with down polaroid transmission axis is absorbed, parallel infrared light is polarized as collimated light beam, collimated light beam liquid crystal molecule evenly distributed in liquid crystal layer is scattered uniformly to scatter light, scattering light infrared light of non-designated wavelength after infrared fileter is filtered, the infrared light of specified wavelength passes through upper polaroid, the direction of vibration infrared light vertical with upper polaroid transmission axis will be absorbed, parallel infrared light is polarized as the uniform infrared light dot matrix vertical with liquid crystal display panel.The infrared beam of diverging is scattering into the function of uniform infrared light harness by the pixel of liquid crystal display by the liquid-crystal apparatus, can be obviously improved the precision of 3D scanning imagery.
Description
Technical field
The utility model belongs to infrared 3D structure light scan technology, and in particular to a kind of to become uniformly dissipating by infrared divergence light
Penetrate the liquid-crystal apparatus of structure light.
Background technique
Existing infrared 3D structure light scan technology is mainly used in 3D image objects and the imaging of 3D face, and principle is logical
It crosses the infrared structure luminous point battle array projector and the infrared light spot of generation is projected into body surface, be formed by array using these luminous points
It is reflected back the distance (depth) that infrared camera calculates object different location.It needs to pacify when in mobile device using existing technology
The additional infrared structure luminous point battle array projector is filled to generate infrared light dot matrix.But the infrared structure luminous point battle array projector exists
Compared with the dot matrix limited amount projected is needed in small area, the poor problem of energy distribution of laser influences the essence of 3D scanning imagery
Degree and quality.Therefore, how to make luminous point more, light lines are more tiny, the feature of Energy distribution more evenly, significantly to mention
The precision and area for rising 3D scanning imagery are as problem in the urgent need to address in the prior art.
Existing liquid crystal display (LCD), especially high clear screen possess more liquid crystal molecules (pixel) in unit area,
When the light of scattering passes through each liquid crystal molecule, more light lines can be obtained, and liquid crystal display gets over the corresponding liquid crystal point of high definition
Son is more, then thinner lines will be obtained in unit area.
Utility model content
The utility model provides a kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light, realizes
The infrared beam of diverging is scattering into the function of uniform infrared light harness by the pixel of liquid crystal display (LCD), significantly to mention
Rise the precision of 3D scanning imagery.
The liquid-crystal apparatus disclosed by the utility model that infrared divergence light is become to homogenous diffusion structure light, including backlight mould
Group, the liquid crystal display panel being placed on backlight module, and with the liquid crystal display drive circuit for driving liquid crystal display panel luminous, backlight module
In be built-in with infrared laser fluorescent tube, liquid crystal display panel includes the down polaroid set gradually from the direction of backlight module, liquid crystal layer, red
Outer optical filter and upper polaroid；
After liquid crystal display drive circuit is powered, infrared laser fluorescent tube issues the infrared laser of scattering through down polaroid, vibration side
It is absorbed to the infrared light vertical with down polaroid transmission axis, the direction of vibration infrared light parallel with down polaroid transmission axis is inclined
Vibration is collimated light beam, and collimated light beam liquid crystal molecule evenly distributed in liquid crystal layer is scattered uniformly to scatter light, scatters light
The infrared light of non-designated wavelength is filtered after infrared fileter, and the infrared light of specified wavelength passes through upper polaroid, vibration
The direction infrared light vertical with upper polaroid transmission axis will be absorbed, the direction of vibration infrared light parallel with upper polaroid transmission axis
It is polarized as the uniform infrared light dot matrix vertical with liquid crystal display panel.
A kind of equipment is also disclosed in the utility model, is configured with liquid-crystal apparatus as characterized above.
Another equipment is also disclosed in the utility model comprising processor, memory, proximity sensor, infrared camera,
And liquid-crystal apparatus as characterized above, after proximity sensor detects close object, the backlight module of liquid-crystal apparatus
It opens, the liquid crystal display drive circuit driving liquid crystal display panel of liquid-crystal apparatus works to project uniform infrared light dot matrix to proximity object
Column；The infrared light spot that infrared camera issues irradiates proximity object, and the reflected image information of formation is sent to processor；Processor
It receives the reflected image information of infrared camera return and determines whether close to proximity object be user.
Processor receives the reflected image information of infrared camera return and determines whether close to proximity object be user,
It can be implemented by using the prior art, specifically include:
User identity identification program and user's 3D human face data are stored in the memory；
After proximity sensor detects close object, the backlight module of liquid-crystal apparatus is opened, the liquid crystal of liquid-crystal apparatus
Driving circuit drives liquid crystal display panel work to project uniform infrared light spot array to proximity object；
The infrared light spot that infrared camera issues irradiates proximity object, and the reflected image information of formation is sent to processor；
When processor receives the reflected image information of infrared camera return and determines proximity object for living body, run memory
The user identity identification program of interior storage, specifically includes:
Judge whether the face for people by people's face recognition algorithms；
If being confirmed as face, the depth information of reaction face is formed using the reflected image information that infrared camera returns
3D human face data；
The 3D human face data of formation is carried out face feature with user's 3D human face data preparatory in memory to compare, to distinguish
Know whether proximity object out is user.
If it is confirmed that being user, it is possible to provide corresponding service；It is on the contrary then be in silent status.It can provide corresponding clothes
Business includes but is not limited to unlocking screen, payment information exchange, the control to hardware device.
As a preferred embodiment, which further includes Visible Light Camera connected to the processor, for showing proximity object.
As a preferred embodiment, which further includes light sensor and supplementary lighting sources connected to the processor, in light
When line sensor detects light intensity lower than preset value, triggering supplementary lighting sources shine, close to be shown by Visible Light Camera
Object.
As a preferred embodiment, the equipment is mobile intelligent terminal.
The utility model has the advantages that
It is provided by the utility model by infrared divergence light become homogenous diffusion structure light liquid-crystal apparatus and method relative to
Mode is penetrated with more luminous point quantity in traditional infrared structure luminous point battle array projector, this face LCD, thinner light lines,
Preferable Energy distribution can be obviously improved the precision and area of 3D scanning imagery.
The liquid-crystal apparatus can be applied to portable equipment or relevant industries equipment, passed through on smart phone for example, applying
Face recognition technology realizes unlocking screen, face verification payment etc., can also also be applied to access control system, payment system, gate
Deng in the related application equipment or system by recognition of face offer respective service.
Detailed description of the invention
Fig. 1 is to apply example 1 to become homogenous diffusion structure light schematic illustration for light is scattered；
Fig. 2 is the circuit connection block diagram of device in embodiment 2；
Fig. 3 is the structural schematic diagram of device in embodiment 2；
Fig. 4 is the work flow diagram of device in embodiment 2；
Attached drawing mark:
In Fig. 1: 1- backlight module, 2- infrared laser fluorescent tube, 3- down polaroid, 4- liquid crystal layer, 5- infrared fileter, on 6-
Polaroid, 7- infrared light dot matrix, 8- liquid crystal display drive circuit；
In Fig. 3: 11- novel liquid crystal display screen (LCD), 12- processor (not shown in FIG.), 13- memory are (in figure not
Show), 14- proximity sensor, 15- infrared camera, 16- light sensor, 17- Visible Light Camera, 18- supplementary lighting sources (are being schemed
In be not shown).
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Below with specific embodiment to this
The technical solution of utility model is described in detail.
As shown in Figure 1, embodiment 1 discloses a kind of liquid-crystal apparatus that infrared divergence light is become to homogenous diffusion structure light, class
Like one piece of liquid crystal display with specific function, abbreviation novel liquid crystal display screen (LCD) mainly includes being placed in novel liquid crystal display screen backlight mould
Infrared laser fluorescent tube 2 in group 1, the down polaroid 3 being placed on backlight module 1, the liquid crystal layer 4 being placed on infrared polaroid 3 are set
In the infrared fileter 5 on liquid crystal layer 4, the upper polaroid 6 being placed on infrared fileter 5, and for driving liquid crystal display to work
Liquid crystal display drive circuit 8.
Diverging light is specifically become to the process of homogenous diffusion light are as follows: after liquid crystal display drive circuit 8 is powered, infrared laser fluorescent tube
2 issue the infrared laser of scattering, and when by down polaroid 3, the direction of vibration infrared light vertical with 3 transmission axis of down polaroid will be by
It absorbs, the infrared light of transmission is only left the direction of vibration polarised light parallel with 3 transmission axis of down polaroid, thus by scattered infrared light
Polarization is collimated light beam.When collimated light beam passes through liquid crystal layer 4, collimated light beam scattering is uniform by evenly distributed liquid crystal molecule
Scattering light；It scatters when light passes through infrared fileter 5 and filters the infrared light of non-designated wavelength.It, may in filtering process
The scattering direction of some scattered light is influenced to influence final effect, therefore second layer polaroid is set to be adjusted.Work as
When the infrared light of specified wavelength passes through upper polaroid 6, the direction of vibration infrared light vertical with 6 transmission axis of upper polaroid will be inhaled
It receives, the infrared light of transmission is only left the direction of vibration polarised light parallel with 6 transmission axis of upper polaroid, so that scattered infrared light is inclined
Vibration is the uniform infrared light dot matrix 7 vertical with liquid crystal display.
Novel liquid crystal display screen described in embodiment 1 (LCD) is applied to mobile device by embodiment 2, to carry out 3D living body faces
Recognition screen unlock.
As shown in Figures 2 and 3, which has novel liquid crystal display screen 11, processor 12 and memory 13, in New
11 top of crystalline substance screen is equipped with proximity sensor 14, infrared camera 15, light sensor 16, Visible Light Camera 17 and supplementary lighting sources 18.
Wherein, the related applications such as Face datection algorithm, face recognition algorithms are stored in memory 13.
As shown in connection with fig. 4, when in use, after proximity sensor 14 has detected object, novel liquid crystal display screen 11 is automatically turned on
Backlight module 1, depend on liquid crystal display drive circuit 8 on novel liquid crystal display screen 11 and start to work, novel liquid crystal display screen 11 projects
Even infrared light spot array 7；Infrared camera 15 (only having reflected image to the object for having temperature) for 3D imaging issues infrared
Luminous point is to irradiate the object that proximity sensor 14 detects, when detecting living body, infrared camera 15 can return to object reflection
Image is simultaneously sent to processor 12；Processor 12 determines that proximity object is living body, and the Face datection stored in run memory 13
Application program, judge after Face datection algorithm operation the object whether be people face；If being confirmed as face, further adjust
With the face recognition algorithms stored in memory 13, face's difference is calculated using the reflected image data that infrared camera 15 returns
The distance (depth) of position, and obtain 3D human face data；Then by these reaction faces depth informations 3D human face data with
The 3D human face data of preparatory user carries out face feature calculating ratio pair in memory, to recognize whether as user
Otherwise I, keeps lock state if it is confirmed that being that I then completes unlocking screen.It should be noted that face inspection therein
Method of determining and calculating and face recognition algorithms etc. can be realized by existing algorithm, also not where the present utility model point, herein not
It repeats again.
Wherein, it is seen that identification process auxiliary in part can be shown to user and check proximity object by light camera 17.Further, in light
In the case that line sensor 16 detects that light is weaker, fill-in light can also be issued by supplementary lighting sources 18, to facilitate visible light
The clear use of camera 17.
From embodiment 2 as can be seen that we can realize portrait vivo identification, face by this novel liquid crystal display screen (LCD)
Detection, or recognition of face is further realized to verify user identity.Therefore, it can be applied to different fields in a variety of manners
Scape carries out recognition of face unlock or payment for example, being arranged in mobile terminal in embodiment 2；It can also be with other service equipments
Connection or component part as service equipment, for example, access control system, going out ticket gate machine, attendance checking system etc., and in identification
Afterwards, corresponding service is provided.
Although the embodiments of the present invention are described in conjunction with attached drawing above, the utility model does not limit to
In above-mentioned specific embodiments and applications field, above-mentioned specific embodiment is only schematical, directiveness, without
It is restrictive.Those skilled in the art under the enlightenment of this specification, are not departing from the utility model claims
In the case where the range protected, a variety of forms can also be made, these belong to the column of the utility model protection.
Claims (6)
1. a kind of liquid-crystal apparatus that infrared divergence light is become to homogenous diffusion structure light, including backlight module, it is placed in backlight module
On liquid crystal display panel, and with the liquid crystal display drive circuit for driving liquid crystal display panel luminous, which is characterized in that in backlight module
It is equipped with infrared laser fluorescent tube, liquid crystal display panel includes the down polaroid set gradually from the direction of backlight module, liquid crystal layer, infrared absorption filter
Mating plate and upper polaroid；
After liquid crystal display drive circuit is powered, infrared laser fluorescent tube issues the infrared laser of scattering through down polaroid, direction of vibration with
The vertical infrared light of down polaroid transmission axis is absorbed, and the direction of vibration infrared light parallel with down polaroid transmission axis, which is polarized, is
Collimated light beam, collimated light beam liquid crystal molecule evenly distributed in liquid crystal layer are scattered uniformly to scatter light, and scattering light passes through
The infrared light of non-designated wavelength is filtered after infrared fileter, and the infrared light of specified wavelength passes through upper polaroid, direction of vibration
The infrared light vertical with upper polaroid transmission axis will be absorbed, and the direction of vibration infrared light parallel with upper polaroid transmission axis is inclined
Vibration is the uniform infrared light dot matrix vertical with liquid crystal display panel.
2. a kind of equipment, which is characterized in that configured with infrared divergence light is become homogenous diffusion structure as described in claim 1
The liquid-crystal apparatus of light.
3. a kind of equipment, which is characterized in that including processor, memory, proximity sensor, infrared camera, and as right is wanted
Liquid-crystal apparatus described in asking 1, after proximity sensor detects close object, liquid-crystal apparatus works to project to proximity object
Uniform infrared light spot array；The infrared light spot that infrared camera issues irradiates proximity object, and the reflected image information of formation is sent out
It send to processor；Processor receives the reflected image information that infrared camera returns and determines whether user.
4. equipment as claimed in claim 3, which is characterized in that further include Visible Light Camera connected to the processor, for showing
Show proximity object.
5. equipment as claimed in claim 3, which is characterized in that further include light sensor and light filling light connected to the processor
Source, when light sensor detects light intensity lower than preset value, triggering supplementary lighting sources shine, with aobvious by Visible Light Camera
Show proximity object.
6. the equipment as described in claim 3 to 5 any one, which is characterized in that the equipment is mobile intelligent terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820833500.7U CN208255596U (en) | 2018-05-31 | 2018-05-31 | A kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820833500.7U CN208255596U (en) | 2018-05-31 | 2018-05-31 | A kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208255596U true CN208255596U (en) | 2018-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820833500.7U Active CN208255596U (en) | 2018-05-31 | 2018-05-31 | A kind of liquid-crystal apparatus and equipment that infrared divergence light is become to homogenous diffusion structure light |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208255596U (en) |
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2018
- 2018-05-31 CN CN201820833500.7U patent/CN208255596U/en active Active
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