CN104330952A - 2D/3D switchable display device - Google Patents
2D/3D switchable display device Download PDFInfo
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- CN104330952A CN104330952A CN201410629656.XA CN201410629656A CN104330952A CN 104330952 A CN104330952 A CN 104330952A CN 201410629656 A CN201410629656 A CN 201410629656A CN 104330952 A CN104330952 A CN 104330952A
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- diffraction
- signal
- display device
- laser light
- light source
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B35/00—Stereoscopic photography
- G03B35/18—Stereoscopic photography by simultaneous viewing
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/34—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers
- G02B30/36—Stereoscopes providing a stereoscopic pair of separated images corresponding to parallactically displaced views of the same object, e.g. 3D slide viewers using refractive optical elements, e.g. prisms, in the optical path between the images and the observer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/332—Displays for viewing with the aid of special glasses or head-mounted displays [HMD]
- H04N13/337—Displays for viewing with the aid of special glasses or head-mounted displays [HMD] using polarisation multiplexing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to the display technology and provides a 2D/3D switchable display device. The 2D/3D switchable display device comprises a signal input end, a diffraction projection system and a projection direction control system, all of which are orderly connected together, wherein the diffraction projection system is used for performing far-field diffraction projection on different-visual angle images of an object in a time sequence to display the images; the projection direction control system is used for deflecting different angles according to the object diffraction projection time sequence of the diffraction projection system; the diffraction projection system comprises a signal transmission conversion unit, a laser light source, a beam shaping unit and a diffraction modulator; the laser light source, the beam shaping unit, the diffraction modulator and the projection direction control system are arranged according to an optical path; the signal transmission conversion unit is connected with the signal input end, the diffraction modulator and the projection direction control system, respectively. The display device comprises no mechanical unit and all the adopted components are electronic control panel components and convenient to integrate; micro-components are adopted, which are easy to minimize and convenient to carry; the 2D/3D switchable display device is suitable for the existing display devices.
Description
Technical field
The invention belongs to display technique field, specifically relate to a kind of 2D (two dimension)/3D (three-dimensional) switchable display device.
Background technology
Traditional display mode is generally two dimensional surface, but the world that we see is three-dimensional, three-dimensional.3 D stereo is presented in traditional two dimensional surface display and adds third dimension depth information.Based on human eye principle of parallax, wears glasses also can make people feel stereoeffect, but, this method bring mobile unlike, service time the problem such as people's kopiopia of a specified duration.People more expect new 3D display, and bore hole just can experience stereoeffect.Existing naked eye three-dimensional display technique mainly contains tracing of human eye stereo display, body 3-D display, hologram three-dimensional display, light field display etc.Wherein, hologram three-dimensional and light field display can realize directly positive 3-D display, and the depth perception of human eye and the focusing of human eye do not deposit conflict, can not cause visual fatigue.
Holographic display obtains after laser instrument appearance from the sixties in 20th century and develops rapidly.Simultaneously its Basic Mechanism utilizes optical interference method to record object light wave amplitude and phase place.Remain whole amplitude of original Object light wave and the information of phase place because the reconstruction of hologram resembles light wave, therefore phenomenon and the original there is identical three-dimensional character again.Light field 3-D display can allow beholder see the not ipsilateral of same object.And hologram three-dimensional display existence of the prior art does not have suitable Dynamic Announce carrier bottleneck, body of light 3 d display device has vibrating machine or needs a lot of camera projector to splice, and therefore also not easily realizes hypomegetic display device.But the 2D display do not existed at present based on diffraction projection and light field 3D display device.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of 2D/3D switchable display device that can realize showing based on 2D display and the 3D of diffraction projection, and this device saves energy consumption, is easy to realize miniaturization.
The technical solution adopted for the present invention to solve the technical problems is: a kind of 2D/3D switchable display device, comprise signal input part, diffraction optical projection system and projecting direction control system, described signal input part, diffraction optical projection system and projecting direction control system are connected successively, and described diffraction optical projection system carries out far field construction Projection Display to the different visual angles image of object chronologically, projecting direction control system carries out the deflection of different angles according to the sequential of diffraction optical projection system diffraction projected objects, diffraction optical projection system comprises Signal transmissions conversion equipment, LASER Light Source, beam shaping unit and diffraction modulation device, projecting direction control system comprises deflection device and yawing moment control module, described LASER Light Source, beam shaping unit, diffraction modulation device and deflection device are according to light path arrangement, Signal transmissions conversion equipment respectively with signal input part, diffraction modulation device and yawing moment control module are connected, described Signal transmissions converting unit is used for digital video signal and the display mode signal of the transmission of Received signal strength input end, the deflection angle of projecting direction control system is controlled according to display mode signal, and by the discernible control signal of digital video signal conversion cost device, the light beam that described beam shaping unit sends for receiving LASER Light Source, and shaping is carried out to it, described diffraction modulation device modulates for the control signal exported according to Signal transmissions conversion equipment the laser beam incided on deflection device, described yawing moment control module is used for the control signal that Received signal strength transmission converting unit transmits, and controls according to this control signal the deflection that deflection device carries out respective angles.
As the preferred version of technique scheme, described diffraction optical projection system also comprises Laser control unit, and this unit is connected with LASER Light Source and Signal transmissions converting unit respectively.
Concrete, described deflection device is liquid crystal device, and its material is blue phase liquid crystal or ferroelectric liquid crystals.
Further, deflection device comprises liquid crystal wave plate and cascade liquid crystal polarization gratings.
Concrete, described display mode signal is 2D or 3D display.
Concrete, described LASER Light Source is three LASER Light Source that can produce different wave length.
Preferably, described LASER Light Source is semiconductor laser light resource.
Further, described beam shaping unit also comprises optical filter and closes color chips.
The invention has the beneficial effects as follows: automatically controlled switching between 2D and 3D can be realized, display device does not adopt mechanical hook-up, the device adopted is all automatically controlled dull and stereotyped device, and realize 3D display by electric control liquid crystal polarization gratings, do not need to use other utility appliance (as glasses etc.) to realize 3D display; In addition, adopt device to be all micro element, therefore this device is easy to realize miniaturization, is easy to carry, practical.The present invention is applicable in existing display device.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the schematic diagram that projecting direction of the present invention does not deflect when carrying out 2D display;
Fig. 3 is that projecting direction of the present invention carries out deflecting schematic diagram when carrying out 3D display continuously;
Fig. 4 is the schematic diagram that the present invention carries out projecting direction control system when 3D shows;
Fig. 5 is the another kind of schematic diagram that the present invention carries out projecting direction control system when 3D shows;
Wherein, 1 is diffraction optical projection system, and 2 is projecting direction control system, and 21 is liquid crystal wave plate, and 22 is cascade liquid crystal polarization gratings.
Embodiment
Below in conjunction with accompanying drawing, describe technical scheme of the present invention in detail.
As shown in Figure 1, wherein, straight line represents annexation, arrow represents light beam direction of transfer, a kind of 2D/3D switchable display device of the present invention, comprise signal input part, diffraction optical projection system and projecting direction control system, described signal input part, diffraction optical projection system and projecting direction control system are connected successively, the digital video signal that described signal input part receiving computer or miscellaneous equipment send, described diffraction optical projection system carries out diffraction Projection Display to the different visual angles image of object chronologically; Projecting direction control system carries out the deflection of different angles according to the sequential of diffraction optical projection system diffraction projected objects;
Diffraction optical projection system comprises Signal transmissions converting unit, LASER Light Source, beam shaping unit and diffraction modulation device, projecting direction control system comprises deflection device and yawing moment control module, described yawing moment control module is used for the control signal that Received signal strength transmission converting unit transmits, and controls according to this control signal the deflection that deflection device carries out respective angles; Described LASER Light Source, beam shaping unit, diffraction modulation device and deflection device are according to light path arrangement, and Signal transmissions converting unit is connected with signal input part, diffraction modulation device and yawing moment control module respectively,
Described Signal transmissions converting unit is used for digital video signal and the 2D/3D display of the transmission of Received signal strength input end, the deflection angle of projecting direction control system is controlled according to 2D/3D display, and by the discernible control signal of digital video signal conversion cost device.Specifically, be the control signal that can identify converting beam shaping unit, diffraction modulation device and projecting direction control system to.In reality, this unit comprises signal transmission module and signal conversion module;
For the ease of controlling the brightness of the laser beam that LASER Light Source is launched, also comprise Laser control unit, this unit is connected with LASER Light Source and Signal transmissions converting unit respectively;
The light beam that described beam shaping unit sends for receiving LASER Light Source, and shaping is carried out to it.The light beam that described LASER Light Source produces obtains required directional light or spherical wave through beam shaping unit reflection and shaping.
In order to can color display, described LASER Light Source be three LASER Light Source that can produce different wave length, and beam shaping unit also comprises optical filter and closes color chips.The three light beams that LASER Light Source sends reenters and is mapped on deflection device after optical filtering and conjunction look become beam of laser.Laser beam after shaping is through diffraction modulation device generation far field construction, the projection can observing target image in diffractional field space after diffraction modulation device is reproduced, namely along with sightingpiston is with the amplification display of the distance increase target image of diffraction modulation device, and image all keeps focusing on.
The signal input part of described diffraction modulation device is connected with the signal output part of Signal transmissions modular converter, modulates for the control signal exported according to Signal transmissions converting unit the laser beam incided on deflection device.Obtain required directional light or sphere through beam shaping unit diffraction occurs after diffraction modulation device to form Projection Display.
As shown in Figure 2, when the display mode signal received is 2D display, then projecting direction control system will work in static schema, and deflection device is equivalent to transparent devices, namely the laser beam direction incided in this system can not deflect, and now this device carries out the display of 2D diffraction.When the light field obtained after diffraction modulation device is the far field construction distribution of target image, the far field construction distribution of target image is through the field distribution of far field construction reproducing target image light.
As shown in Figure 3, if 3D display, then projecting direction control system will work in dynamic mode, and the direction of laser beam deflects to different directions by certain sequential, and then form 3D display.Diffraction optical projection system 1 forms image, as the sequential t of certain unit interval to the diffraction projection that 3D object carries out different directions chronologically
-n, t
-1, t
0, t
1, t
n, n is the number of cascade polarisation grid.Projecting direction control system 2 is also at the sequential t of certain unit interval
-n, t
-1, t
0, t
1, t
nto the perspective view from diffraction optical projection system 1 outgoing by-n θ, 0, n θ, wherein, θ is the angle of diffraction of single liquid crystal polarization gratings, and n is that the number of cascade polarisation grid deflects.In concrete use, the sequential of yawing moment is not limited thereto.Therefore, 3D real image or the virtual image is formed in space.
As shown in fig. 4 or 5, the deflection device of projecting direction control system 2 can be liquid crystal device, but does not limit liquid crystal device or other can realize the direction deflection device of function in the present invention.Liquid crystal device can be blue phase liquid crystal or ferroelectric liquid crystal material, also can be the liquid crystal material that other respond fast in addition.Fast response liquid crystal device as adopted in figure is liquid crystal wave plate 21 and cascade liquid crystal polarization gratings 22.In use, projecting direction control system carries out the deflection of different angles according to the sequential of diffraction optical projection system diffraction projected objects, and this angle is determined by the deflection angle of liquid crystal polarization gratings and cascade number, carry out as requested clockwise or be rotated counterclockwise.Liquid crystal wave plate 21 can work in two patterns: work in static schema, and it is isotropy device; When working in dynamic mode (powering up), it is equivalent to quarter-wave plate, can the polarization state of modulating the incident light.Brilliant polarization grating 22 also can work in two patterns: work in static schema, it is isotropy device; When working in dynamic mode (powering up), it is equivalent to Polarization-Sensitive sinusoidal grating, can the polarization direction of modulating the incident light.Zero level, positive one-level and negative one-level light is had from the emergent light of sinusoidal grating outgoing.For Polarization-Sensitive sinusoidal grating, when grating is in static state, emergent light is zero order light, when this grating is in powering state, left-hand polarization light will deflect from the outgoing of θ angular direction through grating, and right-handed polarized light will deflect from negative θ angular direction outgoing through this grating.Cascaded up by multiple liquid crystal polarization gratings, incident polarized light determines whether deflect by the duty of grating successively.
Device of the present invention can be used alone, and also can be integrated in miscellaneous equipment.
Claims (8)
1. a 2D/3D switchable display device, it is characterized in that, comprise signal input part, diffraction optical projection system and projecting direction control system, described signal input part, diffraction optical projection system and projecting direction control system are connected successively, and described diffraction optical projection system carries out far field construction Projection Display to the different visual angles image of object chronologically; Projecting direction control system carries out the deflection of different angles according to the sequential of diffraction optical projection system diffraction projected objects;
Diffraction optical projection system comprises Signal transmissions converting unit, LASER Light Source, beam shaping unit and diffraction modulation device, projecting direction control system comprises deflection device and yawing moment control module, described LASER Light Source, beam shaping unit, diffraction modulation device and deflection device are according to light path arrangement, and Signal transmissions converting unit is connected with signal input part, diffraction modulation device and yawing moment control module respectively;
Described Signal transmissions converting unit is used for digital video signal and the display mode signal of the transmission of Received signal strength input end, the deflection angle of projecting direction control system is controlled according to display mode signal, and by the discernible control signal of digital video signal conversion cost device;
The light beam that described beam shaping unit sends for receiving LASER Light Source, and shaping is carried out to it;
Described diffraction modulation device modulates for the control signal exported according to Signal transmissions converting unit the laser beam incided on deflection device;
Described yawing moment control module is used for the control signal that Received signal strength transmission converting unit transmits, and controls according to this control signal the deflection that deflection device carries out respective angles.
2. a kind of 2D/3D switchable display device as claimed in claim 1, is characterized in that, described diffraction optical projection system also comprises Laser control unit, and this unit is connected with LASER Light Source and Signal transmissions converting unit respectively.
3. a kind of 2D/3D switchable display device as claimed in claim 1 or 2, is characterized in that, described deflection device is liquid crystal device, and its material is blue phase liquid crystal or ferroelectric liquid crystals.
4. a kind of 2D/3D switchable display device as claimed in claim 3, is characterized in that, deflection device comprises liquid crystal wave plate and cascade liquid crystal polarization gratings.
5. a kind of 2D/3D switchable display device as claimed in claim 1, is characterized in that, described display mode signal is 2D or 3D display.
6. a kind of 2D/3D switchable display device as claimed in claim 1, is characterized in that, described LASER Light Source is three LASER Light Source that can produce different wave length.
7. a kind of 2D/3D switchable display device as claimed in claim 6, is characterized in that, described LASER Light Source is semiconductor laser light resource.
8. a kind of 2D/3D switchable display device as claimed in claims 6 or 7, is characterized in that, described beam shaping unit also comprises optical filter and closes color chips.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410629656.XA CN104330952A (en) | 2014-11-10 | 2014-11-10 | 2D/3D switchable display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410629656.XA CN104330952A (en) | 2014-11-10 | 2014-11-10 | 2D/3D switchable display device |
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| CN104330952A true CN104330952A (en) | 2015-02-04 |
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| CN109116570A (en) * | 2018-09-27 | 2019-01-01 | 深圳市速腾聚创科技有限公司 | Diffraction device and control method based on diffraction device |
| CN111176049A (en) * | 2018-11-13 | 2020-05-19 | 电子科技大学 | Liquid crystal optical device, imaging apparatus and imaging method |
| JP2020148871A (en) * | 2019-03-13 | 2020-09-17 | 日本放送協会 | Three-dimensional video display device |
| US20210055556A1 (en) * | 2019-08-22 | 2021-02-25 | Htc Corporation | Display device |
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| US11609429B2 (en) * | 2019-08-22 | 2023-03-21 | Htc Corporation | Display device |
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Application publication date: 20150204 |