CN105573026A - Projector - Google Patents
Projector Download PDFInfo
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- CN105573026A CN105573026A CN201610122848.0A CN201610122848A CN105573026A CN 105573026 A CN105573026 A CN 105573026A CN 201610122848 A CN201610122848 A CN 201610122848A CN 105573026 A CN105573026 A CN 105573026A
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- China
- Prior art keywords
- camera lens
- projector
- spatial light
- slide mechanism
- axial line
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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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
Abstract
The invention discloses a projector, which comprises a spatial light modulation device and a lens. The optical center of the lens does not directly face the geometrical center of the spatial light modulation device, so that the image projected by the projector shifts, and the projector can be placed at the place not influencing the sight of people and without adopting an upward projection or downward projection mode, and can realize vertical screen projection; and the image can be fully projected on a screen, thereby preventing the problems of inaccurate focusing and trapezoid deformation due to adoption of the upward projection or downward projection mode in the common projection, and improving definition of the projector.
Description
Technical field
The present invention relates to a kind of projector.
Background technology
Projector is the visual plant of modern image media presentation, compared with other projection equipments, has the advantages such as use is flexible, display area is large, low price, has a wide range of applications in industries such as education, business, amusement, exhibitions.
Current projector adopts front projection, that is, projector and beholder are in the same side of projector screen, in order to avoid projector stops the sight line of spectators, projector needs the top or the below that are arranged on screen usually, when not changing projector's projection angle, the picture position of launching also can change along with the change of the position of projector, thus can deflect away from outside screen, therefore throw or face upward the mode of throwing to ensure that the coincidence of image and screen have to adopt to bow, but bow and throw or face upward throwing and can produce such problem: projector's spatial light modulating apparatus is perpendicular to projector lens axial line, according to convex lens imaging principle, a planar object perpendicular to convex lens axial line, its imaging is also perpendicular to convex lens axial line.And bow and throw or face upward the mode of throwing, screen plane is also not orthogonal to the axial line of projector lens, and therefore, the picture plane of spatial light modulating apparatus is not parallel with screen, and always some can accurately be focused no matter how to adjust image on screen.As shown in Figure 1, be described above screen for projector, projector projects downwards, and screen upper limb is close to projector, and lower edge is away from projector.When upper limb is accurately focused, the focusing of lower edge is located in screen front, will affect the overall sharpness of projected image, the particularly sharpness of screen bottom like this.The resolution of early stage projector is lower, and mostly at about 800*600, focusing is inaccurate not obvious on picture quality impact, but along with the development of shadow casting technique, the resolution of high definition projector reaches 1920*1080, even higher, and focus error is just increasing on the impact of picture quality.So projector develops into the high definition epoch, what projection angle caused can not the problem of accurately focusing within the scope of full screen again, has become more and more outstanding.
In addition, when projector bows and throws or face upward throwing, also can cause the distortion of image, need to carry out keystone, present projector adopts electronic keystone correction, and can cause the loss of resolution during electronic keystone correction, thus also has influence on the quality of image.
For above problem, also occurred now several technical solution, one is the fish eye lens formula and curved face reflecting type that adopt in short focus projector.Although these two kinds of short focus projectors can solve problem above, but also bring new problem: picture distorts, the even color of brightness disproportionation is uneven, picture distortion is the intrinsic problem of short-focus lens, just as wide-angle lens in camera, be difficult to overcome, due to above reason, cause short focus projector image quality lower than non-short focus projector, simultaneously because short-focus lens manufacture difficulty is large, short focus projector cost is also just high than the cost of non-short Jiao.
Summary of the invention
The present invention be directed to a kind of projector that above-mentioned deficiency provides, when in the left and right of screen, upper and lower each side projects in the position of projector, projector's angle need not be changed, keep projector's projection angle normal to screen, projected image can remain in screen ranges, has same sharpness with when screen centre position projects; The image simultaneously launched can not produce distortion, does not need keystone, can not lose resolution, and picture distortion is little.
1, in order to solve the problem, the invention provides a kind of projector, comprise spatial light modulating apparatus and camera lens, its design feature is: the axial line of camera lens outward flange circumference shows the geometric center of effective pixel area through spatial light modulating apparatus, camera lens is parallel to the straight line of axial line for axle with outside Rotational Symmetry camera lens axial line, to be parallel to the another straight line of the axial line of Rotational Symmetry camera lens for rotational line, the part intercepting Rotational Symmetry camera lens forms, the structure of camera lens is rotation asymmetry, its optical centre is outside the axial line of camera lens outward flange circumference, optical centre also through spatial light modulating apparatus display effective pixel area geometric center and outside the straight line being parallel to camera lens axial line.
In this programme, camera lens is core component, the camera lens of conventional projectors is that central authorities are thicker, the rotation-symmetric lenses that edge is thinner, camera lens in this programme can be regarded as the part intercepted from traditional Rotational Symmetry camera lens, the pass of camera lens and traditional Rotational Symmetry camera lens is: the cutting circumference of described camera lens with tangent with traditional Rotational Symmetry camera lens circumference, and forms a point of contact.
Described spatial light modulating apparatus comprises the dimming components of monolithic and three, the region of the spatial light modulating apparatus display valid pixel in Single-panel projection machine refers to the relevant range of light modulation device itself, and the region of the spatial light modulating apparatus display valid pixel in three machines refers to the synthesis output face of light modulated synthesis X prism.
As improvement, when projector's horizontal positioned, the optical centre of described camera lens, the upper limb showing effective pixel area with spatial light modulating apparatus is in same vertical height.
After above-mentioned setting, camera lens coordinates the function that just can realize clear projection with spatial light modulating apparatus.In this programme, camera lens and spatial light modulating apparatus interval are arranged, the geometric center that axial line and the spatial light modulating apparatus of camera lens outward flange circumference show the region of valid pixel is alignd, when projector's horizontal positioned, the optical centre of camera lens is above the geometric center upright position in the region of spatial light modulating apparatus display valid pixel, and the picture position that the image ratio tradition that such projector launches adopts the projector of Rotational Symmetry camera lens to launch is on the upper side.If projector is placed on below screen, the mode of facing upward throwing just can be taked to project, keep projection angle and screen vertical, still can complete for image be thrown on screen; When projector is placed on the top of screen, lifting is inverted by projector, the image that the picture position launched adopts the projector of Rotational Symmetry camera lens to launch than tradition is on the lower side, so just do not need to take the mode of throwing of bowing yet, like this can not the problem of exact focus with regard to overcome when tradition adopts the projector of Rotational Symmetry camera lens to bow to throw and face upward throwing, also there will not be anamorphose simultaneously, do not need to do keystone, thus improve the sharpness of projection.
Further improvement, the penetrating cylindrical sleeve of camera lens and two ends is connected together, the shell of cylinder and projector is fixed together, camera lens can relative to rotary drum, the deflection direction of optical centre also rotates thereupon, time optical centre is partial to that direction, which direction the image of projection is also just partial to, the position that so just can realize projector is put flexibly, the upper of screen can be placed on, under, left, right, lower-left, upper left, the diverse location of bottom right and upper right, can keep projecting with screen vertical, obtain indeformable image clearly, and use more flexible.
The another kind of scheme of this patent comprises shell, spatial light modulating apparatus and camera lens, its design feature is: also comprise slide mechanism, the large sleeve that two ends are penetrating and small sleeve, large sleeve is fixed together with shell, small sleeve and slide mechanism are fixed together, size jacket casing is connected together, small sleeve can rotate relative to large sleeve, camera lens is installed on the sliding mechanism, the position of camera lens can be moved along with slide mechanism, camera lens is rotational symmetric, the optical centre of camera lens can move to the geometric center through spatial light modulating apparatus display effective pixel area and be parallel to the position outside the straight line of camera lens axial line.
Adopt the projector of this programme, slide mechanism can the position at mobile optical center, the rotation of sleeve can determine the direction of optical centre movement, along with the movement of optical centre, shift to which direction, which direction image will be partial to, and the amplitude of deflection is adjustable, the direction simultaneously deflected also is adjustable, so the position that just can realize projector is like this put flexibly, the upper of screen can be placed on, under, left, right, lower-left, upper left, the diverse location of bottom right and upper right, can keep projecting with screen vertical, obtain indeformable image clearly, and use more flexible.
As improvement, camera lens is generated by symmetrical arc of excision one each about a circular Rotational Symmetry camera lens.Adopt the camera lens of this programme, when sliding on different positions, for ensureing the making full use of of light, camera lens will covering space light adjusting gear all the time, so the bore of camera lens is larger, camera lens is in the both sides of glide direction, have part-structure inoperative for imaging all the time, thus can to the both sides of camera lens glide direction respectively excise one symmetrical arc, the lens imaging after cutting does not produce any impact, but can reduced volume be played, the object of weight reduction.
As a kind of preferred implementation, described slide mechanism comprises the slide mechanism shell be fixed on small sleeve, be installed in the chute on slide mechanism shell, be arranged on the slide plate inside chute, be installed in the tooth bar on slide plate, slide mechanism shell is provided with and rack-driving meshed gears, slide mechanism outer side is provided with the knob coaxially set firmly with gear, and camera lens is fixedly connected with slide plate.
Because chute, slide plate, tooth bar, gear and knob form transmission matching relationship, therefore, when needs adjustment camera lens upper-lower position, only need turning knob, knob just can rotate by driven wheel, the rack drives slide plate that such gear will be coordinated by transmission, along slide, so just achieves the mobile of camera lens and regulates, operate very simple.
In sum, when the position of projector during upper and lower each side's projection in the left and right of screen, need not change projector's angle, keep projector's projection angle normal to screen, projected image remains in screen ranges, has same sharpness with when screen centre position projects; The image simultaneously launched can not produce distortion, does not need keystone, can not lose resolution; Picture distortion is little; Brightness and uniform in color.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is that conventional projectors projects to defect sturcture schematic diagram that screen focuses;
Fig. 2 is the structural representation of this projector when projecting from the bottom up;
Fig. 3 is the structural representation of this projector when projecting from top to bottom;
Fig. 4 is camera lens interception position schematic diagram relative to Rotational Symmetry camera lens in embodiment one;
Fig. 5 is the comparison structure schematic diagram of camera lens front view, semisectional view and stereographic map in embodiment one;
Fig. 6 is the one-piece construction schematic diagram of embodiment two;
Fig. 7 is the lens construction schematic diagram of embodiment three;
Fig. 8 is the fit structure schematic diagram of rack and pinion;
Fig. 9 is the one-piece construction schematic diagram of embodiment three.
Embodiment
Embodiment one
As shown in the figure, this projector comprises and is arranged on spatial light modulating apparatus 1 in shell 7 and camera lens 2, the geometric center 4 of axial line through the region of spatial light modulating apparatus display valid pixel of camera lens outward flange circumference, camera lens 2 is parallel to the straight line of axial line for axle with outside Rotational Symmetry camera lens 11 axial line, to be parallel to the another straight line of the axial line of Rotational Symmetry camera lens 11 for rotational line, the part intercepting Rotational Symmetry camera lens 11 forms, the structure of camera lens 2 is rotation asymmetry, its optical centre 3 is outside the axial line of camera lens 2 outward flange circumference, optical centre 3 is also showing the geometric center 4 of effective pixel area and outside the straight line being parallel to camera lens 2 axial line through spatial light modulating apparatus 1.
In this programme, camera lens is core component, and the camera lens of conventional projectors is that central authorities are thicker, the rotation-symmetric lenses 11 that edge is thinner, and the camera lens 2 in this programme can be regarded as the part intercepted from traditional Rotational Symmetry camera lens 11.In this programme, the pass of camera lens 2 and traditional Rotational Symmetry camera lens 11 is: the cutting circumference of described camera lens 2 with tangent with traditional Rotational Symmetry camera lens 11 circumference, and forms a point of contact.
When projector's horizontal positioned, the optical centre 3 of described camera lens, shows the upper limb place 5 of effective pixel area in same vertical height with spatial light modulating apparatus 1.
After above-mentioned setting, camera lens 2 coordinates the function that just can realize clear projection with spatial light modulating apparatus 1.In this programme, camera lens 2 and spatial light modulating apparatus interval 2 are arranged, the geometric center 4 that axial line and the spatial light modulating apparatus 1 of camera lens outward flange circumference show the region of valid pixel is alignd, the optical centre 3 of camera lens 2 is above geometric center 4 upright position in the region of spatial light modulating apparatus display valid pixel, and the picture position that the image ratio tradition that such projector launches adopts the projector of Rotational Symmetry camera lens 11 to launch is on the upper side.If projector is below screen, the mode of facing upward throwing just can be taked to project, keep projection angle and screen vertical, still can complete for image be thrown on screen; When projector is above screen, lifting is inverted by projector, the image that the picture position launched adopts the projector of Rotational Symmetry camera lens to launch than tradition is on the lower side, so just do not need to take the mode of throwing of bowing yet, like this can not the problem of exact focus with regard to overcome when tradition adopts the projector of Rotational Symmetry camera lens to bow to throw and face upward throwing, also there will not be anamorphose simultaneously, do not need to do keystone, thus improve the sharpness of projection.
Embodiment two
As shown in the figure, this projector comprises and is arranged on spatial light modulating apparatus 1 in shell 7 and camera lens 2 as embodiment one, the geometric center 4 of axial line through the region of spatial light modulating apparatus display valid pixel of camera lens outward flange circumference, camera lens 2 is parallel to the straight line of axial line for axle with outside Rotational Symmetry camera lens 11 axial line, to be parallel to the another straight line of the axial line of Rotational Symmetry camera lens 11 for rotational line, the part intercepting Rotational Symmetry camera lens 11 forms, the structure of camera lens 2 is rotation asymmetry, its optical centre 3 is outside the axial line of camera lens 2 outward flange circumference, optical centre 3 is also showing the geometric center 4 of effective pixel area and outside the straight line being parallel to camera lens 2 axial line through spatial light modulating apparatus 1.
The penetrating cylinder 6 of camera lens 2 and two ends connects together, cylinder 6 links together with the shell 7 of projector, camera lens 3 can rotate relative to cylinder 6, so just can realize camera lens 2 optical centre and be partial to different directions, time optical centre 3 is partial to that direction, which direction the image of projection is also just partial to, the position that so just can realize projector is put flexibly, the upper of screen can be placed on, under, left, right, lower-left, upper left, the diverse location of bottom right and upper right, can keep projecting with screen vertical, obtain indeformable image clearly, and use more flexible.
Embodiment three
The another kind of scheme of this patent comprises shell 7, spatial light modulating apparatus 1 and camera lens 2, also comprise slide mechanism 15, the large sleeve 8 that two ends are penetrating and small sleeve 9, large sleeve 8 is fixed together with shell 7, small sleeve 9 and slide mechanism 15 are fixed together, size jacket casing is connected together, small sleeve 9 can rotate relative to large sleeve 8, camera lens 2 is arranged on slide mechanism 15, the position of camera lens 2 can be moved along with slide mechanism 15, camera lens 2 is rotational symmetric, the optical centre 3 of camera lens 2 can move to and show the geometric center 4 of effective pixel area and the position outside the straight line being parallel to camera lens 2 axial line through spatial light modulating apparatus 1.
Adopt the projector of this programme, along with the movement of optical centre 3, be partial to which direction, which direction image will be partial to, and the amplitude departed from is adjustable, the direction of simultaneously departing from also is adjustable, so the position that just can realize like this projector is put flexibly, the diverse location of the upper and lower, left and right of screen, lower-left, upper left, bottom right and upper right can be placed on, can keep projecting with screen vertical, obtain indeformable image clearly, and use more flexible.
Camera lens 2 is by a Rotational Symmetry camera lens about 11 respectively symmetrical arc of excision one and generating.Adopt the camera lens 2 of this programme, when sliding on different positions, for ensureing the making full use of of light, camera lens 2 will covering space optic modulating device all the time, so the bore of camera lens 2 is larger, in the both sides of camera lens 2 in glide direction, have part-structure inoperative for imaging all the time, thus can to the both sides of camera lens 2 glide direction respectively excise one symmetrical arc, the camera lens 2 after cutting does not produce any impact to projection, but can reduced volume be played, the object of weight reduction.
Described slide mechanism 15 comprises the slide mechanism shell 20 be fixed on small sleeve 9, be installed in the chute 24 on slide mechanism shell 20, be arranged on the slide plate 14 inside chute 24, be installed in the tooth bar 21 on slide plate, slide mechanism shell 20 is provided with and tooth bar 21 transmission meshed gears 22, be provided with the knob 23 coaxially set firmly with gear 22 outside slide mechanism shell 20, camera lens 2 is fixedly connected with slide plate 14.
Because chute 24, slide plate 14, tooth bar 21, gear 22 and knob 23 form transmission matching relationship, therefore, when needing the position adjusting camera lens 2, only need turning knob 23, knob 23 just can rotate by driven wheel 22, the tooth bar 21 that such gear 22 will be coordinated by transmission drives slide plate 14 to slide along chute 24, so just achieves the position adjustments of camera lens 2, operates very simple.
Claims (6)
1. a projector, comprise spatial light modulating apparatus (1) and camera lens (2), it is characterized in that: the axial line of camera lens (2) outward flange circumference shows the geometric center (4) of effective pixel area through spatial light modulating apparatus (1), camera lens (2) is parallel to the straight line of axial line for axle with outside Rotational Symmetry camera lens (11) axial line, to be parallel to the another straight line of the axial line of Rotational Symmetry camera lens (11) for rotational line, the part intercepting Rotational Symmetry camera lens (11) forms, the structure of camera lens (2) is rotation asymmetry, its optical centre (3) is outside the axial line of camera lens (2) outward flange circumference, optical centre (3) also through spatial light modulating apparatus (1) display effective pixel area geometric center (4) and outside the straight line being parallel to camera lens (2) axial line.
2. projector as claimed in claim 1, it is characterized in that: when projector's horizontal positioned, the optical centre (3) of described camera lens (2), the upper limb (5) showing effective pixel area with spatial light modulating apparatus (1) is in same vertical height.
3. projector as claimed in claim 1, it is characterized in that: the camera lens (2) of the projector cylinder (6) penetrating with two ends connects together, cylinder (6) is fixed together with the shell (7) of projector, and camera lens (2) can rotate relative to cylinder (6).
4. a projector, comprise shell (7), spatial light modulating apparatus (1) and camera lens (2), it is characterized in that: also comprise slide mechanism (15), the large sleeve (8) that two ends are penetrating and small sleeve (9), large sleeve (8) same to shell (7) is fixed together, small sleeve (9) and slide mechanism (15) are fixed together, size jacket casing is connected together, small sleeve (9) can rotate relative to large sleeve (8), camera lens (2) is arranged on slide mechanism (15), camera lens (2) is rotational symmetric, the position of camera lens (2) can be mobile along with slide mechanism (15), the optical centre (3) of camera lens (2) can move to the geometric center (4) through spatial light modulating apparatus (1) display effective pixel area and be parallel to the position outside the straight line of camera lens (2) axial line.
5. projector as claimed in claim 4, is characterized in that: camera lens (2) is generated by symmetrical arc of circular each excision one in Rotational Symmetry camera lens (11) left and right.
6. the projector as described in claim 4 or 5, it is characterized in that: described slide mechanism (15) comprises the slide mechanism shell (20) being fixed on small sleeve (9), be installed in the chute (24) on slide mechanism shell (20), be arranged on the slide plate (14) of chute (24) the inside, be installed in the tooth bar (21) on slide plate (14), slide mechanism shell (20) is provided with and tooth bar (21) transmission meshed gears (22), slide mechanism shell (20) outside is provided with the knob (23) coaxially set firmly with gear (22), camera lens (2) is fixedly connected with slide plate (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122848.0A CN105573026B (en) | 2016-03-04 | 2016-03-04 | Projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610122848.0A CN105573026B (en) | 2016-03-04 | 2016-03-04 | Projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105573026A true CN105573026A (en) | 2016-05-11 |
| CN105573026B CN105573026B (en) | 2018-01-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610122848.0A Expired - Fee Related CN105573026B (en) | 2016-03-04 | 2016-03-04 | Projector |
Country Status (1)
| Country | Link |
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| CN (1) | CN105573026B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61275831A (en) * | 1985-05-31 | 1986-12-05 | Matsushita Electric Ind Co Ltd | Image projector |
| CN1704838A (en) * | 2004-06-03 | 2005-12-07 | 精工爱普生株式会社 | Projector |
| CN2777578Y (en) * | 2004-12-03 | 2006-05-03 | 力捷电脑(中国)有限公司 | lens cone and base assembling structure for use in digital lens module |
| JP2009251457A (en) * | 2008-04-09 | 2009-10-29 | Fujinon Corp | Projection optical system and projection type display using the same |
| CN101661149A (en) * | 2008-08-25 | 2010-03-03 | 佛山普立华科技有限公司 | Focusing device |
| JP2014043211A (en) * | 2012-08-28 | 2014-03-13 | Mitsubishi Electric Corp | Headlight device |
-
2016
- 2016-03-04 CN CN201610122848.0A patent/CN105573026B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61275831A (en) * | 1985-05-31 | 1986-12-05 | Matsushita Electric Ind Co Ltd | Image projector |
| CN1704838A (en) * | 2004-06-03 | 2005-12-07 | 精工爱普生株式会社 | Projector |
| CN2777578Y (en) * | 2004-12-03 | 2006-05-03 | 力捷电脑(中国)有限公司 | lens cone and base assembling structure for use in digital lens module |
| JP2009251457A (en) * | 2008-04-09 | 2009-10-29 | Fujinon Corp | Projection optical system and projection type display using the same |
| CN101661149A (en) * | 2008-08-25 | 2010-03-03 | 佛山普立华科技有限公司 | Focusing device |
| JP2014043211A (en) * | 2012-08-28 | 2014-03-13 | Mitsubishi Electric Corp | Headlight device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105573026B (en) | 2018-01-05 |
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