CN103645560B - A kind of high-speed light scanning display apparatus - Google Patents
A kind of high-speed light scanning display apparatus Download PDFInfo
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- CN103645560B CN103645560B CN201310655489.1A CN201310655489A CN103645560B CN 103645560 B CN103645560 B CN 103645560B CN 201310655489 A CN201310655489 A CN 201310655489A CN 103645560 B CN103645560 B CN 103645560B
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Abstract
A kind of high-speed light scanning display apparatus of the present invention, belongs to the technical field that light display is shown.Structure have light source (1) and along micro-drift angle generation module (2) that light path is placed successively, local ellipsoidal mirror (3) and receiving screen (4).Micro-drift angle generation module (2) can make light produce small drift angle, and local ellipsoidal mirror (3), for drift angle is amplified, finally at the upper hot spot formed with control signal scanning of receiving screen (4), thus realizes image display.Instant invention overcomes the low precision of optical mechaical scanning, scanning angle comparatively minor issue that stability is difficult to the problems such as control and acousto-optic scanning, have the advantages that scanning accuracy is high, stability is high, angle small for light change can be amplified 1-4 the order of magnitude.
Description
Technical field
The invention belongs to the technical field of optical information display, particularly a kind of device that can be used for high-speed light scanning display.
Background technology
Laser television has a lot of advantage relative to traditional tv: in bright gay color, brightness is high, screen size is flexible.Laser display is low to environmental requirement, and usually without the need to any optical focusing system, display size can regulate arbitrarily, can develop into the multifunctional product of over-large screen display system motion-picture projection integration.But by the restriction of technical bottleneck, laser television does not obtain commercialization.
At technical elements, the scan deflection in laser television is a difficult problem: the same with CRT color picture tube, laser beam also will complete the scanning of entire image line by line from top to bottom.Allow the main method of laser beam deflection be by laser beam irradiation at the polygonal prism mirror wheel of High Rotation Speed, do not stop in angle the minute surface that changes is formed after reflection.As high definition picture 1080 row, refresh rate 50 times/second, per secondly will scan 5.4 ten thousand times, when using octahedral prism wheel, 8 times can be scanned because rotating 1 week, therefore 5.4 ten thousand times/8 is 6750 revolutions per seconds, and the rotating speed equaling prism wheel is 40.5 ten thousand revs/min, and the noise that so high rotating speed brings, control, lubrication, cost and life-span etc. are all difficult to meet puts practical condition on market.Laser beam deflection is allowed to also have a kind of method to be acousto-optic scanning, compared with a kind of front method, acousto-optic scanning utilizes ultrasonic wave to the effect of light, light beam is made to deflect to realize scanning, owing to there is not significantly mechanical movement, it has advantages such as controlling easily, sweep speed is fast, system configuration is simple, and its shortcoming is that scanning angle is little.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art, provides a kind of Optical devices that may be used for high-speed light scanning display.
Above-mentioned technical problem is realized by following technical scheme:
A kind of high-speed light scanning display and reading device, its structure has: light source 1 and receiving screen 4; Described light source 1 is the light source that can provide thin collimated light beam; It is characterized in that: also have along micro-drift angle generation module 2 that light path is placed successively and local ellipsoidal mirror 3 between light source 1 and receiving screen 4; Described micro-drift angle generation module 2 accepts thin collimated light beam that light source 1 produces and produces the device of a drift angle again; Described local ellipsoidal mirror 3 is speculums that ellipse that an eccentricity is greater than 0.6 rotates the ellipsoid an obtained part around its major axis obtains at inner side plating reflectance coating, with obtained ellipsoid center for initial point, major axis is that y-axis sets up three-dimensional cartesian coordinate system, and the part of described ellipsoid refers to that ellipsoid is positioned at below x-y plane and the y part that is less than 0.
Described micro-drift angle generation module 2 can be the mirror unit of a band control device, and the center of mirror unit is in described ellipsoid distance local ellipsoidal reflector 3 focus far away, and binary rotation can be done around the center of mirror unit by mirror unit; Described control device is that control signal added by a basis is with index glass unit, thus change mirror unit towards device.
The described mirror unit preferably length of side is the square-shaped planar speculum of 1um ~ 1dm.
Described micro-drift angle generation module 2 also can be made up of the controlled transparent plate of two pieces of refractive indexes and convex lens, two transparent plates are positioned at the side of convex lens near light source 1, the center of two transparent plates is on the primary optical axis of convex lens, angle between the normal of each transparent plate and the primary optical axis of convex lens is 0 ° ~ 90 °, two planes that the normal of two transparent plates and the primary optical axis of convex lens are determined are orthogonal, the primary optical axis of convex lens overlaps with the primary optical axis of local ellipsoidal mirror 3, and the focus far away with described ellipsoid distance local ellipsoidal reflector 3 away from the focus of light source 1 of convex lens overlaps, the transparent plate that described refractive index is controlled, it is the structure that two parallel transparency electrodes clip liquid crystal or electrooptic crystal.
Described micro-drift angle generation module 2 can also be made up of the parabolic reflector of the controlled transparent plate of two pieces of refractive indexes and an inner side plating reflectance coating, the center on two transparent plate bases is on the primary optical axis of parabolic reflector, angle between the normal of each transparent plate and the primary optical axis of parabolic reflector is 0 ° ~ 90 °, two planes that the normal of two transparent plates and the primary optical axis of parabolic reflector are determined are orthogonal, the primary optical axis of parabolic reflector overlaps with the primary optical axis of local ellipsoidal mirror 3, and the focus of parabolic reflector overlaps with the described ellipsoid distance focus that locally ellipsoidal reflector 3 is far away, the transparent plate that described refractive index is controlled, it is the structure that two parallel transparency electrodes clip liquid crystal or electrooptic crystal.
" a kind of high-speed light scanning display apparatus " of the present invention has following beneficial effect:
1, scanning accuracy is high, scans owing to present invention employs micro-drift angle generation module, and micro-drift angle generation module acts on the drift angle that light produces and control signal has one-to-one relationship, so scanning accuracy is higher than the precision of optical mechaical scanning mode.
2, stability is high, and micro-drift angle of the present invention generation module relies on the mode of small motion or change crystal refractive index to carry out work, and there is not significantly mechanical movement, is full solid-state device, so job stability is high.
3, scanning angle is large, and the ellipsoidal reflector adopted in the present invention very effectively can amplify scanning angle, angle small for light change can be amplified 1-4 the order of magnitude.
Accompanying drawing explanation
Fig. 1 is a kind of high-speed light scanning display apparatus overall structure schematic diagram of the present invention.
Fig. 2 is the control device schematic diagram of micro-drift angle generation module 3 that embodiments of the invention 1 adopt.
Fig. 3 is the structural representation of micro-drift angle generation module 2 that embodiments of the invention 2 adopt.
Fig. 4 is the structural representation of micro-drift angle generation module 2 that embodiments of the invention 3 adopt.
Embodiment
Below in conjunction with accompanying drawing, technical characteristic of the present invention and operation principle are further described.
Embodiment 1
With reference to figure 1, high-speed light scanning display apparatus comprises light source 1 and along micro-drift angle generation module 2 that light path is placed successively, local ellipsoidal reflector 3 and receiving screen 4.Wherein micro-drift angle generation module 2 by can change minute surface towards mirror unit and control device form, the square-shaped planar speculum of described mirror unit to be a length of side be 1um ~ 1dm, the center of mirror unit is in described ellipsoid distance local ellipsoidal reflector 3 focus far away, and under the drive of control device, can do two degrees of freedom rotation around the center of mirror unit.
The structure of described control device is shown in Fig. 2, this device has and is similar to gimbal structure, wherein one end of outside framework is connected with outer piezoelectric ceramic stack, outside piezoelectric ceramic stack promotion or pull lower can rotation around the axis x-axis of outside framework, the stroke of outer piezoelectric ceramic stack can be changed by the voltage changed on outer piezoelectric ceramic stack, and then the angle that change outside framework rotates around x-axis, one end of inner frame is connected with interior piezoelectric ceramic stack, interior piezoelectric ceramic stack promotion or pull lower can rotation around the axis y-axis of inner frame, the stroke of interior piezoelectric ceramic stack can be changed by changing the voltage be added on interior piezoelectric ceramic stack, and then the angle that change inner frame rotates around y-axis, x-axis and y-axis are mutually vertical and be in same plane, the center superposition of intersection point and mirror unit, so just can by changing the control signal on control device, realizing mirror unit is fulcrum with central point, binary rotation is done around x-axis and y-axis, thus change mirror unit towards.
The thin collimated light beam that light source 1 sends reflexes on the ellipsoidal mirror 3 of local through micro-drift angle generation module 2, is reflexed to receiving screen 4 more afterwards by local ellipsoidal mirror 3, and receiving screen 4 forms a hot spot.When the control signal on the control device being added in micro-drift angle generation module 2 makes intermittent scanning in certain limit, the yawing moment of mirror unit also can make scan variations in certain limit, and then the light that reflects of mirror unit and mirror unit do not deflect the light that front-reflection goes out and can produce a continuous small drift angle changed, this small drift angle is amplified by local ellipsoidal mirror 3, and final reflection ray then can form picture in the enterprising line scanning of receiving screen 4.
Embodiment 2
With reference to figure 3, change the micro-drift angle generation module 2 in embodiment 1 into structure shown in Fig. 3, namely micro-drift angle generation module 2 is made up of transparent panel, refractive index regulation device and the convex lens that two refractive indexes are controlled.The transparent panel that described refractive index is controlled is the structure that two parallel transparency electrodes clip liquid crystal or electrooptic crystal.Because the refractive index of liquid crystal or electrooptic crystal can change with the change of added voltage thereon, so refractive index can be controlled by the voltage changed between electrode.By there is the small translation in paper after first transparent panel in light, by there is small translation after second transparent panel in the plane of vertical paper in light, the size of twice translational movement is that the voltage by being added in each transparent panel both sides controls, and last light is through the focus of convex lens.The light in the two directions size of translational movement and the angle of emergent light and convex lens optical axis has one-to-one relationship, control signal voltage swing added on the electrode of that is transparent plate determines the angle between the emergent ray of convex lens and convex lens primary optical axis, finally realize facula position along with the change of control signal voltage on receiving screen 4 scanning form picture.It should be noted that the light action effect of this micro-drift angle generation module 2 pairs of different frequencies is different.
Embodiment 3
With reference to figure 4, the convex lens in the micro-drift angle generation module 2 in embodiment 2 are changed into the parabolic reflector of inner side plating reflectance coating, also can realize same object.
Embodiment 4
When the present invention is used for the display of color laser TV, light source needs, with three light sources 1, to provide three primary colors thin collimated light beam respectively, and the device shown in coloured light Fig. 1 that three primary colors are mixed into carries out processing to realize colored display; If micro-drift angle generation module 2 adopts is embodiment 2(Fig. 3) or embodiment 3(Fig. 4) alternative structure, then need to overlap high-speed light scanning display apparatus of the present invention with three and process the light that three light sources 1 provide respectively.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a high-speed light scanning display apparatus, its structure has: light source (1) and receiving screen (4); Described light source (1) is the light source that can provide thin collimated light beam; It is characterized in that between light source (1) and receiving screen (4), have micro-drift angle generation module (2) and local ellipsoidal mirror (3) of placing successively along light path; Described micro-drift angle generation module (2) is the device accepting thin collimated light beam that light source (1) produces and produce a drift angle again; Described local ellipsoidal mirror (3) is the speculum that ellipse that an eccentricity is greater than 0.6 rotates the ellipsoid an obtained part around its major axis obtains at inner side plating reflectance coating, with obtained ellipsoid center for initial point, major axis is that y-axis sets up three-dimensional cartesian coordinate system, and the part of described ellipsoid refers to that ellipsoid is positioned at below x-y plane and the y part that is less than 0.
2. a kind of high-speed light scanning display apparatus according to claim 1, it is characterized in that: described micro-drift angle generation module (2) is the mirror unit of a band control device, the center of mirror unit is in described ellipsoid distance local ellipsoidal reflector (3) focus far away, and mirror unit can do binary rotation around the center of mirror unit; Described control device is that control signal added by a basis is with index glass unit, thus change mirror unit towards device.
3. a kind of high-speed light scanning display apparatus according to claim 2, is characterized in that: the square-shaped planar speculum of described mirror unit to be a length of side be 1um ~ 1dm.
4. a kind of high-speed light scanning display apparatus according to claim 1 and 2, it is characterized in that: described micro-drift angle generation module (2) is made up of the controlled transparent plate of two pieces of refractive indexes and convex lens, two transparent plates are positioned at the side of convex lens near light source (1), the center of two transparent plates is on the primary optical axis of convex lens, angle between the normal of each transparent plate and the primary optical axis of convex lens is 0 ° ~ 90 °, two planes that the normal of two transparent plates and the primary optical axis of convex lens are determined are orthogonal, the primary optical axis of convex lens overlaps with the primary optical axis of local ellipsoidal mirror (3), and the focus far away with described ellipsoid distance local ellipsoidal reflector (3) away from the focus of light source (1) of convex lens overlaps, the transparent plate that described refractive index is controlled, it is the structure that two parallel transparency electrodes clip liquid crystal or electrooptic crystal.
5. a kind of high-speed light scanning display apparatus according to claim 1 and 2, it is characterized in that: described micro-drift angle generation module (2) is made up of the parabolic reflector of the controlled transparent plate of two pieces of refractive indexes and an inner side plating reflectance coating, the center on two transparent plate bases is on the primary optical axis of parabolic reflector, angle between the normal of each transparent plate and the primary optical axis of parabolic reflector is 0 ° ~ 90 °, two planes that the normal of two transparent plates and the primary optical axis of parabolic reflector are determined are orthogonal, the primary optical axis of parabolic reflector overlaps with the primary optical axis of local ellipsoidal mirror (3), and the focus of parabolic reflector overlaps with the described ellipsoid distance focus that locally ellipsoidal reflector (3) is far away, the transparent plate that described refractive index is controlled, it is the structure that two parallel transparency electrodes clip liquid crystal or electrooptic crystal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655489.1A CN103645560B (en) | 2013-12-06 | 2013-12-06 | A kind of high-speed light scanning display apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655489.1A CN103645560B (en) | 2013-12-06 | 2013-12-06 | A kind of high-speed light scanning display apparatus |
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| CN103645560A CN103645560A (en) | 2014-03-19 |
| CN103645560B true CN103645560B (en) | 2015-09-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107643603B (en) * | 2016-07-21 | 2021-04-09 | 天马微电子股份有限公司 | Stereoscopic display device and control method |
| CN117289496B (en) * | 2023-11-21 | 2024-02-23 | 武汉光谷航天三江激光产业技术研究院有限公司 | High-precision laser beam scanning device based on electro-optic crystal and use method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101611355A (en) * | 2007-01-31 | 2009-12-23 | 视瑞尔技术公司 | Holographic reconstruction system with optical wave tracking means |
| JP2012058178A (en) * | 2010-09-13 | 2012-03-22 | Ricoh Co Ltd | Laser radar device |
| CN103269411A (en) * | 2013-04-15 | 2013-08-28 | 首都师范大学 | Scanning imaging device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050117047A (en) * | 2004-06-09 | 2005-12-14 | 삼성전자주식회사 | Optical system for scanning angle enlargement and laser scanning apparatus applied the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101611355A (en) * | 2007-01-31 | 2009-12-23 | 视瑞尔技术公司 | Holographic reconstruction system with optical wave tracking means |
| JP2012058178A (en) * | 2010-09-13 | 2012-03-22 | Ricoh Co Ltd | Laser radar device |
| CN103269411A (en) * | 2013-04-15 | 2013-08-28 | 首都师范大学 | Scanning imaging device |
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Granted publication date: 20150909 Termination date: 20161206 |