CN103852963A - Projection system capable of enhancing spherical display brightness - Google Patents
Projection system capable of enhancing spherical display brightness Download PDFInfo
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- CN103852963A CN103852963A CN201210504816.9A CN201210504816A CN103852963A CN 103852963 A CN103852963 A CN 103852963A CN 201210504816 A CN201210504816 A CN 201210504816A CN 103852963 A CN103852963 A CN 103852963A
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Abstract
The invention brings forward a projection system capable of enhancing spherical display brightness, relates to the field of optical projection, and particularly relates to a projection system capable of enhancing spherical display brightness, wherein spherical display is formed by projection of a projector on a ball screen. Problems of loss of display brightness in spherical projection adopting a fish-eye lens are solved by the projection system. The main points of the technical scheme of the invention are that: the projection system capable of enhancing spherical display brightness comprises a light source, a light-splitting device and a projection display device. The light source comprises a lamp, a lamp cup and a brightness enhancing structure. The brightness enhancing structure enables the projection display device to display circular light spots. The projection system is mainly applied to ball screen projection.
Description
Technical field:
The present invention relates to optical projection field, the particularly projector optical projection system that can strengthen spherical display brightness to the spherical demonstration of ball-screen projection formation.
Background technology:
Existing projector mainly adopts monolithic DLP technology and three LCD technology, and their projected spot is square focus spot.And in spherical display system, ball curtain camera lens adopts projection fish eye lens, summit is the centre of sphere, it projects imaging on ball curtain (projecting plane) is sphere, for each round section of sphere, only has the peak use rate that just can reach projection light in the time that this circle is the incircle of square focus spot, and in incircle square focus spot part in addition, owing to can not being imaging region, therefore lost in vain, in fact brightness and pixel have all been lost.This peak use rate is only 59% of whole projection lights.
Summary of the invention:
The present invention solves the problem of spherical display brightness loss in the fish-eye globular projection of existing employing, and the optical projection system that can strengthen spherical display brightness is provided.
Technical scheme of the present invention is such:
The optical projection system that can strengthen spherical display brightness, described optical projection system comprises light source, light-dividing device, projection display equipment, and described light source comprises lamp and Lamp cup, also comprises that brightness strengthens structure, and described brightness strengthens structure makes projection display equipment show circular light spot.
It is optical wand that described brightness strengthens structure, described optical wand has central shaft along light working direction, the each transversal section of described optical wand is to pass the point of this transversal section as the circle in the center of circle taking described central shaft, the direction of advancing along light, and posterior transversal section radius is more than or equal to preceding transversal section radius.
Described brightness enhancing structure is the cylinder optical wand as light balancing device between the colour wheel of projector and image device chip, and described cylinder optical wand is replaced original cuboid optical wand.
Described cylinder optical wand is the optical wand with certain taper more smaller than rear end diameter along light working direction front end.
Described optical projection system is the LCD optical projection system of fly's-eye lens as light balancing device, and each compound eye of described fly's-eye lens is shaped as circle, and the curved surface that described Lamp cup is ellipsoid, to replace parabola curved surface.
The optical projection system that can strengthen spherical display brightness, described optical projection system is LCD optical projection system, comprises light source, light-dividing device, projection display equipment, it is characterized in that described light source is the light source that sends circular light spot.
The described light source that sends circular light spot is LASER Light Source.
Technique effect:
The present invention is owing to making it become circular light spot by the structure that changes projector the square focus spot of existing projector projects, thereby can make it just impinge upon the loss that can eliminate the luminous flux can not imaging region causing in ball curtain lens imaging region, thereby can greatly improve the utilization ratio of light source, the brightness of spherical demonstration is strengthened greatly, and luminous energy is fully used.
For the projector that adopts cuboid optical wand as light balancing device, between the colour wheel of described projector and image device chip, be provided as the cylinder optical wand of light balancing device, for monolithic DLP projector, to arrange between DLP projector and dmd panel light path system, so not only can play equally even light action, also can make to become from cylinder optical wand light out the light that is projected as circular light spot simultaneously.Particularly, for non-equidistant projection, in the time that cylinder optical wand has certain tapering, can dwindle optical beam spot diameter, thereby make light project to ball backstage, ball curtain summit near zone (apart from ball curtain camera lens distal-most end) light strengthens, edge (near ball curtain camera lens place) weakens, this is because be positioned at the projection pattern at the bottom of ball for ball curtain camera lens, because luminous energy is inhomogeneous (dark above, bright below), dwindling of hot spot just in time can change the inhomogeneous situation of energy, makes brightness become relatively all more even on whole sphere.
Brief description of the drawings:
Fig. 1 is the schematic diagram that ball curtain camera lens is positioned at the bottom projection of ball curtain;
Fig. 2 is the schematic diagram that spherical display brightness strengthens optical projection system;
Fig. 3 is prior art and adopts brightness to strengthen the schematic diagram of the light energy distribution contrast of optical projection system.
1-spherical display brightness strengthens optical projection system, 11-light source, 12-condenser, 13-colour wheel, 14-brightness enhancement devices, 15-relay optic, 16-DMD, 17-projection lens, 2-ball curtain
111-drop shadow spread, 112-prior art luminous energy distribution plan, 113-brightness strengthens luminous energy distribution plan
Embodiment:
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Specific embodiment described herein only, in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1:
As shown in Figure 1, be positioned at the schematic diagram of ball curtain 2 bottom projections for spherical display brightness enhancing optical projection system 1.Described projection lens 17 is positioned at ball curtain 2 bottom centre positions, and described projection lens 17 drop shadow spreads 111 cover described whole ball curtain 2, and image projection makes ball curtain 2 not show blind area to ball curtain 2.Preferably, described projection ray can be covered with whole ball curtain 2 just, now, in obtaining best viewing effect, utilizes light source 11 most effective.
As shown in Figure 2, strengthen the schematic diagram of optical projection system for spherical display brightness.
Described spherical display brightness strengthens optical projection system and in the working direction of light, comprises successively light source 11, condenser 12, colour wheel 13, brightness enhancement devices 14, relay optic 15, DMD16, projection lens 17.
The present invention proposes a kind of optical projection system that can strengthen spherical display brightness, described optical projection system comprises light source 11, light-dividing device, projection display equipment, described light source 11 comprises lamp and Lamp cup, characterized by further comprising brightness and strengthen structure, described brightness strengthens structure makes projection display equipment show circular light spot.For example, it is optical wand that described brightness strengthens structure, and the emergent light of described optical wand forms circular light spot.
As shown in Figure 3, the schematic diagram contrasting for the light energy distribution of prior art and employing brightness enhancing optical projection system.The border circular areas that prior art luminous energy distributes in 112 is and the hot spot scope of ball curtain 2 adaptations, and be to ensure ball curtain 2 image non-blind areas, actual existing square focus spot exceeds circular light spot scopes described and ball curtain 2 adaptations, the light of square focus spot corner is not projected onto on ball curtain 2, causes the waste of luminous energy.Strengthen in luminous energy distribution 113 in brightness, square focus spot in described optical projection system is changed to circular light spot, the light that energy is identical is deformed within the scope of the hot spot being brought to ball curtain 2 adaptations, image projection just can be covered with ball curtain 2 to ball curtain 2, with respect to existing square focus spot, circular light spot has strengthened the light intensity of image, and luminous energy is efficiently utilized.
Embodiment 2:
On the basis of embodiment 1, the described brightness enhancing structure of the present embodiment is the cylinder optical wand as light balancing device between the colour wheel 13 of projector and image device chip, and described cylinder optical wand is replaced original cuboid optical wand.
As shown in Figure 2, strengthen the schematic diagram of optical projection system for spherical display brightness.
Described spherical display brightness strengthens optical projection system and in the working direction of light, comprises successively light source 11, condenser 12, colour wheel 13, brightness enhancement devices 14, relay optic 15, DMD16, projection lens 17.
Described light source 11 can adopt halogen tungsten incandescent lamp, high-intensity gas discharge lamp (xenon short-act lamp, dysprosium lamp, Double end metal halogen lamp, ultrahigh pressure mercury lamp), white light LEDs, RGB color separation LED.Described light source 11 forms circular light spot after optically focused.Preferably, described light source 11 is selected LED.LED not only has low-power consumption, low driving voltage, life-span long (the theoretical life-span is more than 100,000 hours), fast response time (nanosecond), vibration resistance and impact and the feature such as pollution-free, and has full gamut clearly. the white point that can modulate. and large-area confusion region.Described light source 11 can adopt single luminophor, for example single led, also can use luminous body array, for example LED array.
The Lamp cup of light source 11 of the present invention adopts the cold reflector of ellipsoid.Want the multiple LED light dispersed directly to gather together and be difficult to, the light that must elder generation each LED be sent pools directional light, then line up array again entirety be pooled in lcd screen.Pool directional light or low-angle divergent beams in order to make to approach the hemispherical luminous energy of dispersing, must design a kind of reverberator, efficient and rational the converging of luminous energy that LED is sent, to improve light utilization efficiency.But from light reflection principle, this reverberator can not lean on a kind of simple plane or spherical reflector to realize, a but compound ellipsoid.Can imagine that we can not all pool directional light all LED light sending, so should make light pool a low-angle diverging light according to the structural requirement of system simultaneously.The method of design is rotational symmetric ellipsoid of model, and its equation is as follows
wherein a=b, 0≤z≤c.Method by special point value can solve equation, and then revises and just can design suitable light cup in conjunction with software simulation effect.
Described brightness enhancement devices 14 is cylinder optical wand, light source 11 is put in the near-end focus of the cold reflector of ellipsoid, and the light incident end center of cylinder optical wand is put in the far-end focus of the cold reflector of ellipsoid.Described cylinder optical wand is along the long axis direction setting of the cold reflector of ellipsoid.Described optical wand can be solid cylinder optical wand or hollow cylinder optical wand.
After optical wand, place relay lens, can make square rod output facula mate with liquid crystal device size and projection objective relative aperture.
DMD16 can select existing Texas ,Usa instrument company corresponding product.
Described projection lens 17 adopts fish eye lens.
Embodiment 3:
On the basis of embodiment 2, it is the optical wand with certain taper more smaller than rear end diameter along light working direction front end that cylinder optical wand is set.For example, described optical wand can be filled circles platform optical wand or hollow round table optical wand.
Embodiment 4:
On the basis of embodiment 1, described optical projection system is the LCD optical projection system of fly's-eye lens as light balancing device, and described brightness strengthens the Lamp cup curved surface that structure is ellipsoid, to replace parabola Lamp cup curved surface.Each compound eye of described fly's-eye lens be shaped as circle.
Embodiment 5:
The present embodiment proposes a kind of optical projection system that can strengthen spherical display brightness, and described optical projection system is LCD optical projection system, comprises light source 11, light-dividing device, projection display equipment, and described light source 11 is for sending the light source of circular light spot.The light source that for example, sends circular light spot, is LASER Light Source.
It should be pointed out that the above embodiment can make the present invention of those skilled in the art's comprehend, but do not limit the present invention in any way.Therefore; although this instructions has been described in detail the present invention with reference to drawings and Examples; but; those skilled in the art are to be understood that; still can modify or be equal to replacement the present invention; in a word, all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of the protection domain of patent of the present invention.
Claims (7)
1. can strengthen the optical projection system of spherical display brightness, described optical projection system comprises light source, light-dividing device, projection display equipment, and described light source comprises lamp and Lamp cup, it is characterized in that, also comprise that brightness strengthens structure, described brightness strengthens structure makes projection display equipment show circular light spot.
2. energy according to claim 1 strengthens spherical display brightness optical projection system, it is characterized in that, it is optical wand that described brightness strengthens structure, described optical wand has central shaft along light working direction, the each transversal section of described optical wand is to pass the point of this transversal section as the circle in the center of circle taking described central shaft, the direction of advancing along light, posterior transversal section radius is more than or equal to preceding transversal section radius.
3. energy according to claim 1 strengthens spherical display brightness optical projection system, it is characterized in that, described brightness enhancing structure is the cylinder optical wand as light balancing device between the colour wheel of projector and image device chip, and described cylinder optical wand is replaced original cuboid optical wand.
4. the optical projection system that can strengthen spherical display brightness according to claim 3, is characterized in that, described cylinder optical wand is the optical wand with certain taper more smaller than rear end diameter along light working direction front end.
5. the optical projection system that can strengthen spherical display brightness according to claim 1, is characterized in that, described optical projection system is the LCD optical projection system of fly's-eye lens as light balancing device, and the curved surface that described Lamp cup is ellipsoid, to replace parabola curved surface.
6. the optical projection system that can strengthen spherical display brightness, described optical projection system is LCD optical projection system, comprises light source, light-dividing device, projection display equipment, it is characterized in that, described light source is the light source that sends circular light spot.
7. according to claim 6ly can strengthen the optical projection system of spherical display brightness, it is characterized in that, described in send circular light spot light source be LASER Light Source.
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| CN201210504816.9A CN103852963B (en) | 2012-11-30 | 2012-11-30 | Spherical display brightness strengthens optical projection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558017A (en) * | 2015-09-25 | 2017-04-05 | 无锡羿飞科技有限公司 | Spherical display image processing method and system |
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| JP2001051232A (en) * | 1999-01-14 | 2001-02-23 | Seiko Epson Corp | Illumination optical system and projection display device using the same |
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Address after: 214213 Jiangsu City, Yixing Province Economic and Technological Development Zone, Wuxi, Xing Xing Road, No. 10, Yixing Photoelectric Industrial Park, room 3, room 101 Patentee after: WUXI E-SPHERE TECHNOLOGY CO., LTD. Address before: 214203 Jiangsu city of Wuxi Province, Yixing economic and Technological Development Zone, Road No. 11 Yixing Pioneer Park building D8 Patentee before: Wuxi E-sphere Technology Co., Ltd. |
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Effective date of registration: 20180117 Address after: 214213, room 3, building 10, Yixing photoelectric industry park, No. 101, apricot Road, Yixing Economic Development Zone, Jiangsu, Wuxi Patentee after: Wuxi e-sphere Education Technology Co. Ltd. Address before: 214213 Jiangsu City, Yixing Province Economic and Technological Development Zone, Wuxi, Xing Xing Road, No. 10, Yixing Photoelectric Industrial Park, room 3, room 101 Patentee before: WUXI SEEMILE TECHNOLOGY CO., LTD. |