CN202735666U - DLP projection optics system based on LED light source - Google Patents
DLP projection optics system based on LED light source Download PDFInfo
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- CN202735666U CN202735666U CN2012203449292U CN201220344929U CN202735666U CN 202735666 U CN202735666 U CN 202735666U CN 2012203449292 U CN2012203449292 U CN 2012203449292U CN 201220344929 U CN201220344929 U CN 201220344929U CN 202735666 U CN202735666 U CN 202735666U
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Abstract
The utility model discloses a DLP projection optics system based on an LED light source. The DLP projection optics system based on the LED light source has an LED light source illumination system, a DMD device, a TIR prism and a projection lens, wherein the LED light source illumination system comprises an LED light source set, a taper light rod, a relay lens group, the taper light rod is a single-side taper, an incident end caliber is close to a light source proportion, a length-width ratio is 1:1, a length-width ratio at an emergence end is 16:10, a medium diameter short edge at the emergence end and an incident end are consistent in dimensions, the DMD device is rhombic pixel, and a long edge direction of the taper light rod is perpendicular to a pixel hinge direction of the DMD device. The DLP projection optics system based on the LED light source solves a problem of mismatching of the length-width ratio of a plane type LED light source and a DMD chip, and improves an energy utilization rate of the digital projector system while a contrast ratio of the digital projector system is not reduced.
Description
Technical field
The utility model belongs to miniature or the Portable projector technical field, is specifically related to a kind of DLP projection optical system based on led light source.
Background technology
In recent years, the DLP projection display technique relies on its abundant color, the picture of high-resolution, the image of high brightness and demonstration of high-contrast to be developed rapidly, and it can realize that volume is less, the product performance that weight is lighter, digital projection field at the cinema particularly, its advantage is incomparable.What the core component in the DLP technology mainly adopted is DMD digital picture chip, DMD is the exclusive digital picture chip of grasping and developing of TIX, the digital micro-mirror that it is arranged by a lot of matrixes forms, miniature reflective mirror has the upsets of 10 degree, 12 degree or 14 degree during work with image digital signal, will enter projection lens from the upset reflection by micro-reflector of the light beam of lighting source and be imaged on the screen.Be the incident angle of coupling dmd chip, improve the homogeneity of projection display picture, the rational deployment projection device components.
The appearance of led light source allows projector be reformed from light source technology, sweeps the innovation hurricane in the projection industry.Led light source is solid state light emitter, never is that the mercury lamp vacuum bulb can match in excellence or beauty in the advantage aspect the anti-vibration damage; Led light source is digital light, and preferably Modulatory character can be provided, and satisfies the application demand of high-performance projection and energy-conservation projection; Led light source satisfies the feature of wide colour gamut high-contrast, and more colorful display technique effect can be provided; Led light source all belongs to the cold light source technology, and luminescence efficiency is high but also in continuous lifting, theoretical value is at more than three times of mercury lamp, and this not only meets the theory of environmental protection and energy saving, more can significantly simplify the design of projector heat radiation and life support system; Led light source is the long-life light source, and short life breaks through 20000 hours, and MaLS can be supported the application more than 100,000 hours, and from then on projection products can take leave of the consumptive material epoch.
Led light source has above-mentioned plurality of advantages, but also have the light source dispersion angle large-nearly bright wavelength-division cloth, light is the shortcoming of easily collecting not.The led light source minitype projection machine of the high brightness that goes on the market before this, such as the GP1 of Benq, the K10 of grand base etc., the DLP projection optical systems that adopt such as Otto code DH5101 are used the compound eye light structures in the even photosystem of optics more, and compact conformation, overall brightness are also higher.But the system aperture angle of using is larger, and the flip angle limit that has even surpassed the DMD micro mirror makes part level state light enter positive status, and contrast descends, and affects overall image quality.
Summary of the invention
The defects that exists for solving prior art, the purpose of this utility model provides a kind of DLP projection optical system based on led light source, solved the length breadth ratio mismatch problem of plane led light source and dmd chip, improved digital projector system capacity utilization factor and do not reduce the contrast of projector system.
For achieving the above object, the technical scheme that the utility model adopts: should be based on the DLP projection optical system of led light source, has the led light source illuminator, DMD device, TIR prism and projection lens, it is characterized in that: described led light source illuminator is made of led light source group, taper optical wand, relay lens group, described taper optical wand is monolateral taper, its incident port footpath approaches with the light source ratio, length breadth ratio is 1:1, the exit end length breadth ratio is 16:10, exit end central diameter minor face and incident end consistent size; Described DMD device is diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.
Be provided with an antireflection diaphragm in the aperture diaphragm position in the described relay lens group.
Described projection lens adopts the ellipse-shaped light hurdle.
Described led light source group comprises light shaping combined system, and it is comprised of crossed dichroic mirror and lens; Wherein comprise at least a slice non-spherical lens, described lens are with the approximate incident end that is imaged on the taper optical wand of led light source.
Adopt the beneficial effect of technique scheme: the illumination section of this optical projection system adopts monolateral taper optical wand, when the DMD device is worked, each pixel of DMD device of diamond pixels along hinge direction ceaselessly in " 12 ° ", " 0 ° ", " 12 ° " upsets (corresponding to 12 ° of DMD devices), the incident light reflection of inciding perpendicular to DMD device pixel hinge direction is entered in the projection lens, this part light is equivalent to the light that the projection lens numerical aperture is F/2.4, is provided by the long side direction of illumination path taper optical wand.In addition, after the light that is parallel to DMD device pixel hinge direction is through DMD device pixel reflects, enter projection lens, this part light is equivalent to the light that the projection lens numerical aperture is F/1.5, this part light is provided by the short side direction of illumination path taper optical wand, thereby the light of led light source is fully used, has increased the capacity usage ratio of system; Simultaneously perpendicular to DMD device pixel hinge direction, the light angle that illuminator provides is numerical aperture F/2.4, with the projection lens of DMD device elliptical diaphragm well mated, thereby do not reduce the contrast of system.So the projection optical system that adopts such scheme to be designed to both can improve digital projector system capacity utilization factor, can obtain again the higher contrast of projector system.
Description of drawings
Below in conjunction with accompanying drawing specific embodiment of the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the elliptical diaphragm shape figure of camera lens that the utility model uses.
Embodiment
The DLP projection optical system based on led light source as shown in Figure 1 is comprised of led light source group 1, taper optical wand 2, relay lens group 3, DMD device 4, TIR prism 5 and projection lens 6.Use the PT54(4:3 of Luminus) light source 7, DMD device 4 is 0.45 cun wxga(16:10) chip, and wherein led light source group 1 comprises light shaping combined system, and it is by crossed dichroic mirror 10,11, and lens (8,9,12) form; Lens 9,12 are non-spherical lens, and three lens are with the approximate incident end that is imaged on the taper optical wand of led light source, and light shaping combined system has compact conformation, the characteristics that efficiency of energy collection is high.Described taper optical wand 2 is monolateral taper, its incident port footpath approaches with the light source ratio, length breadth ratio is 1:1, the exit end length breadth ratio is 16:10, consistent with the DMD device, exit end central diameter minor face and incident end consistent size, described DMD device is diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.Concrete, taper optical wand incident end is of a size of 4.1X4.1, and exit end is 6.2X4.1.Through the led light source light of shaping, be the light of the different numerical apertures of both direction by outgoing behind the taper optical wand, be radiated on the DMD device 4 through relay lens group 3.For obtaining preferably illuminating effect, wherein relay lens group 3 is comprised of four lens (13,14,16,17), is used for optical wand outgoing end face is imaged on the DMD display chip well, is provided with a smooth hurdle 15 near aperture diaphragm, be used for the interception parasitic light, to obtain higher contrast.The long side direction of taper optical wand perpendicular to DMD device pixel hinge direction, equaling the flip angle of dmd chip+/-12 degree in this directional lighting system light angle is F/2.4, with the projection lens of DMD device elliptical diaphragm well mated, thereby do not reduce the contrast of system.Being parallel to DMD device pixel hinge direction is the short side direction of taper optical wand, is F/1.5 in this directional lighting system light angle, and dmd chip is on this direction and light is not had angle limits, can maximize the capacity usage ratio that improves led light source.The DMD device sees through the projection lens outgoing by Digital Signals on screen by the micro mirror reflection ray, forms coloury image.Wherein projection lens adopts ellipse-shaped light hurdle 18, as shown in Figure 2, its axial direction can with DMD device and the fine coupling of illuminator, thereby reach technical ability raising system capacity utilization factor, can reach again higher effect to this degree.Can reach luminous flux 400lm through reality test native system, full switch is to the good image effect of this degree 1000:1.
Innovation of the present utility model is the emergent ray of the led light source emergent ray being changed into both direction different pore size angle by the taper optical wand, aperture angle and dmd chip flip angle are complementary on direction therein, thereby realize the brightness and contrast of image optimum.Every employing the utility model structure or similar structures are realized identical goal of the invention, all belong to the category of the utility model protection.
Claims (4)
1. DLP projection optical system based on led light source, has the led light source illuminator, DMD device, TIR prism and projection lens, it is characterized in that: described led light source illuminator is made of led light source group, taper optical wand, relay lens group, described taper optical wand is monolateral taper, and its incident port footpath approaches with the light source ratio, and length breadth ratio is 1:1, the exit end length breadth ratio is 16:10, exit end central diameter minor face and incident end consistent size; Described DMD device is diamond pixels, is being the long side direction of taper optical wand perpendicular to DMD device pixel hinge direction.
2. the DLP projection optical system based on led light source as claimed in claim 1 is characterized in that: be provided with an antireflection diaphragm in the aperture diaphragm position in the described relay lens group.
3. the DLP projection optical system based on led light source as claimed in claim 1 or 2 is characterized in that: described projection lens employing ellipse-shaped light hurdle.
4. the DLP projection optical system based on led light source as claimed in claim 1, it is characterized in that: described led light source group comprises light shaping combined system, and it is comprised of crossed dichroic mirror and lens; Wherein comprise at least a slice non-spherical lens, described lens are with the approximate incident end that is imaged on the taper optical wand of led light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203449292U CN202735666U (en) | 2012-07-17 | 2012-07-17 | DLP projection optics system based on LED light source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203449292U CN202735666U (en) | 2012-07-17 | 2012-07-17 | DLP projection optics system based on LED light source |
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| Publication Number | Publication Date |
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| CN202735666U true CN202735666U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012203449292U Expired - Lifetime CN202735666U (en) | 2012-07-17 | 2012-07-17 | DLP projection optics system based on LED light source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789122A (en) * | 2012-07-17 | 2012-11-21 | 利达光电股份有限公司 | DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source |
| CN105867643A (en) * | 2015-09-12 | 2016-08-17 | 北京佳拓思科技有限公司 | Computer system based on light projection |
-
2012
- 2012-07-17 CN CN2012203449292U patent/CN202735666U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789122A (en) * | 2012-07-17 | 2012-11-21 | 利达光电股份有限公司 | DLP (digital light processing) projection optical system based on LED (light-emitting diode) light source |
| CN105867643A (en) * | 2015-09-12 | 2016-08-17 | 北京佳拓思科技有限公司 | Computer system based on light projection |
| CN105867643B (en) * | 2015-09-12 | 2017-03-01 | 北京佳拓思科技有限公司 | Computer system based on optical projection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190716 Address after: 473000 No. 366 Xinchen West Road, Nanyang High-tech Zone, Henan Province Patentee after: Nanyang Lida Photoelectric Co.,Ltd. Address before: 473000 Nanyang Industrial Road, Henan, No. 508 Patentee before: LIDA OPTICAL AND ELECTRONIC Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130213 |
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| CX01 | Expiry of patent term |