CN101634754A - LCD projection optical engine adopting LED light source and projection device thereof - Google Patents
LCD projection optical engine adopting LED light source and projection device thereof Download PDFInfo
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- CN101634754A CN101634754A CN200810045644A CN200810045644A CN101634754A CN 101634754 A CN101634754 A CN 101634754A CN 200810045644 A CN200810045644 A CN 200810045644A CN 200810045644 A CN200810045644 A CN 200810045644A CN 101634754 A CN101634754 A CN 101634754A
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Abstract
The invention belongs to a projection light source, a projection optical system and projection display equipment. An optical engine consists of the projection light source, a fly eye lens array, a polarized light converter, a field lens, an alignment lens, a micro lens array, an imaging device LCD screen and a projection lens. A luminous device of the projection light source is a white light power LED array, and a light concentrating element is a collector array. The luminous device, the light concentrating element, the fly eye lens array, the polarized light converter, the micro lens array and an LCD screen lamp with a CF film are reasonably designed and combined to make the projection optical engine acquire high lighting effect and high light output. Because of adopting an LED as a light source lamp, the projection optical engine also has the advantages of long service life, short response time, easy driving, no radiant heat, environmental protection, energy saving, low cost and the like. The optical engine is used as a core component, and is combined with a circuit and a complete machine structure to form a front projection and rear projection device such as a front projector or a rear projection television.
Description
Technical field
Patent of the present invention belongs to projection light source, projection optical system and projection display apparatus.Patent is particularly related to a kind of employing power white light LED array and constitutes projection light source, with collector arrays and fly eye lens array is the main projecting illumination system that constitutes, the Monolithic LC D projecting optical engine of CF (color filter) film color mode, and the projection arrangement that uses this light engine.
Background technology
The front projection apparatus that is called data (Data) projector adopts UHP (ultrahigh pressure mercury lamp) projection light source, dichroic mirror or colour wheel color mode, with high resolving power, the little demonstration of microsize (MD) as image device.Similarly the light engine framework also is used for the MD rear-projection TV.Whole world MD front projection machine and the year production and marketing of MD rear-projection TV reach more than 700 ten thousand.In addition, also have a class to be called the front projection apparatus of video (Video) projector, it adopts the Metal halogen lamp projection light source, with middle low resolution, small size, the α-Si-LCD (amorphous silicon liquid crystal display) of band CF (color filter) film or LTPS-LCD (low temperature polycrystalline silicon liquid crystal display) are as image device.Video frequency projector is used for public place of entertainment and home theater, also can be used as recreation and toy, and the world market annual requirement is also in 1,000,000.
At present, two class front projection machines all adopt the gas-discharge lamp projection light source, exist light source life short, and radiations heat energy is big to wait performance deficiency with power consumption, and in addition, the mercury pollution of its manufacture process also is subjected to the restriction of environmental regulation.In recent years, employing RGB (RGB) light LED having occurred was light source, and MD is the front projection machine of image device, and they have improved life-span, the radiation heat of gas-discharge lamp projection light source, the defective of energy-conserving and environment-protective restriction.But according to the projected light beam extension principle, the light beam of light source propagation that can utilize must be not more than display device beam spread amount, MD micro-display device small-sized, and the light-emitting area of led light source also must be very little, causes the light output of light source and projection engine low.The projection light source of being called special LED is also arranged, and the emergence angle that adopts special process pressure arrow beam of light is so that reduce the light beam of light source propagation, and light-emitting area is relatively large, thereby has improved the light output of light source and engine, but supplier is few, and price is very high.The LCD area that video frequency projector adopted may reach tens of times of MD, and display device beam spread amount is relatively very little to the constraint of light source, but the projecting illumination system that its popular reverberation bowl adds lens makes engine efficiency low to being difficult to surpass 1%.
The present invention has noticed above-mentioned situation comprehensively, therefore creatively proposes a kind of projection light source, projection engine and projection arrangement technical scheme of novelty, and has reached the product practical function.
Summary of the invention
In the technical scheme of patent of the present invention, the design of projection light source, projection engine all has outstanding feature.
Adopt the power white light LED array to constitute projection light source.Compare with the gas-discharge lamp projection light source, the life-span of LED projection light source is long, no mercury pollution, and the response time is extremely short, drives radiationless heat, luminous efficiency of source height easily.Several to tens of power LEDs are arranged in array format,, guarantee higher illuminator light output and the output of projection engine light with this so that obtain required high light source light output.Adopt the used power white light LEDs of general lighting, so that realize sufficient supply and low cost.
The illuminator of projection engine is with gatherer or collector arrays, and fly eye lens array is main formation.Gatherer or collector arrays are the light collecting elements of led light source lamp, and it collects most luminous energy of LED, press the arrow beam of light angle and keep high permeability.The discrete light beams that fly eye lens array sends led array is divided into tens of to hundreds of penlights, and on the LCD screen that is added to one by one, so that improve the geometric configuration utilization factor and the homogeneity of light beam.Light engine adopts gatherer or collector arrays, and behind the fly eye lens array, can realize the illumination efficiency up to 80%, 80% brightness uniformity and 4% engine efficiency.If additional respectively polarisation transducer or the micro mirror array of adopting perhaps adopts both simultaneously, then engine efficiency can further improve, even up to about 7%.The image device of light engine adopts the Monolithic LC D of band CF (color filter) film, about 1～7 inch of Diagonal Dimension scope, it is adopted in hand-held and portable digital product in a large number, and indexs such as resolution and colour are better, the very low outstanding advantage that is better than MD especially of sufficient supplies and cost.CF film color mode helps light engine and reduces cost and reduce size.
Compare with the data projector that adopts the UHP projection light source, the outstanding advantage of using the projector of this projection light source and light engine is that light source life is long, and cost is low, energy-conserving and environment-protective; And compare with the video frequency projector that adopts Metal halogen lamp, its outstanding advantage is long light source life, high light efficiency, high brightness, high uniformity and energy-conserving and environment-protective.This projection light source and light engine also can be used for other classification projection arrangement, as rear-projection TV.
Patent of the present invention is achieved in that
The white light power LED is arranged in regular array, for example regular polygon, rectangle, circle etc.According to the different requirements of light source light output size, the LED quantity of arranging in the array is respectively from several to tens of.The LED that forms array can be a plurality of chips, is arranged in the same encapsulation; Also can be a plurality of encapsulated LED devices separately.Power LED array and supporting with it secondary optics gatherer or collector arrays, MCPCB (Metal Substrate printed circuit board), heating radiator and driving circuit are formed projection light source.From projection light source, along direction of beam propagation, set gradually fly eye lens array, field lens, collimating mirror, image device LCD screen and projection lens, thereby the basic optical engine of formation this patent indication.Optical element and device significant design principle is to guarantee high light efficiency in the engine.The spread length of optical element and device then satisfies following three pairs of conjugate imagings relation in the engine: the led light source and second fly eye lens array, first fly eye lens array and LCD screen, second fly eye lens array and projecting lens.Be further to improve light efficiency, can add the polarisation transducer (PCS) behind the fly eye lens array in the engine, or/and the micro mirror array (MLA) before the LCD screen.As core component, add circuit such as signal Processing, control and power supply with this light engine, engines such as catoptron and screen are optical element outward, and machine shell and machine inner structure part, has just constituted the projection arrangement of this patent indication.
Description of drawings
Fig. 1 is the white light power LED chip array synoptic diagram in a kind of same encapsulation.
Fig. 2 is a kind of white light power LED device array synoptic diagram of encapsulation separately.
Fig. 3 is a kind of white light power LED projection light source synoptic diagram.
Fig. 4 is the basic comprising synoptic diagram of light engine.
Fig. 5 is that the light engine that has added polarisation transducer and micro mirror array constitutes synoptic diagram.
Concrete enforcement
Below in conjunction with the description of drawings specific embodiment:
In accompanying drawing 1,101 white light power LED chips for the composition array, the 102nd, the LED encapsulation, 103 for installing the Metal Substrate printed circuit boards of led array.In accompanying drawing 2,201 the white light of encapsulation power LED devices, the 203rd, the Metal Substrate printed circuit board of installation led array for the composition array.In the projection light source of accompanying drawing 3,301 is led array, the 302nd, and the Metal Substrate printed circuit board of installation led array, 303 is heating radiator, the 304th, the drive circuit board of led array, 305 for being installed in the collector arrays on the led array.Gatherer is with packaged LED is corresponding, and collector arrays is corresponding one by one with the array of packaged LED.Drive circuit board obtains electric power from the power supply of projection arrangement, and with the current constant mode driving LED, LED is a luminous energy with transformation of electrical energy, and the light beam that they send enters back level optical element through gatherer or collector arrays light harvesting.Heating radiator absorbs the heat of LED generation and it is dispersed in the environment, so that projection light source can be stablized and safe operation.
In accompanying drawing 4,403 is projection light source, the 404th, and fly eye lens array, the 406th, field lens, 407 is collimating mirror, the 409th, image device LCD screen, 410 is projection lens.The light beam that led array sends is collected and is pressed the arrow beam of light angle through gatherer or collector arrays, enters fly eye lens array, is split into many penlights, pass through field lens again after, on the image device that is added to one by one, form efficient and high illumination uniformly.The effect of collimating mirror is to make the light beam that enters image device parallel as far as possible, increases the luminous energy that sees through the LCD screen.The optical imagery that projection lens shields LCD amplifies and projects on the screen for watching.
In accompanying drawing 5,503 is projection light source, the 504th, and fly eye lens array, 505 is the polarisation transducer, the 506th, field lens, 507 is collimating mirror, the 508th, micro mirror array, the 509th, image device LCD screen, 510 is projection lens.In the basic comprising of accompanying drawing 4 light engines, on principle of work, image device LCD screen only allows that the linearly polarized light of a direction sees through, and has therefore lost luminous energy over half.Polarisation transducer in the accompanying drawing 5 is the P polarized light and the S polarized light of different direction of vibration with beam separation earlier, and then the P polarisation is transformed into the S polarisation, makes most of luminous energy can see through the LCD screen.The effect of micro mirror array then is to shield each pixel at LCD, changes beam incident angle, makes it to see through the LCD screen from the opening portion of pixel.Polarisation transducer and micro mirror array can both increase substantially the light efficiency of engine.
Claims (5)
1. LCD projecting optical engine, the ordinal characteristics that its light path constitutes is the LCD screen → projection lens of LED projection light source → fly eye lens array → field lens → collimating mirror → band CF film.
2. LCD projecting optical engine, the ordinal characteristics that its light path constitutes is the LCD screen → projection lens of LED projection light source → fly eye lens array → polarisation transducer → field lens → collimating mirror → micro mirror array → band CF film, wherein, polarisation transducer and micro mirror array or adopt a kind ofly arbitrarily or adopt simultaneously.
3. claim 1 and 2 described LED projection light sources adopt white light power LED array, and it can be a plurality of led chips, is arranged in the same encapsulation; Also can be a plurality of encapsulated LED devices separately.A plurality of LED are arranged in regular graphic arrays such as regular polygon, rectangle, circle.
4. claim 1 and 2 described projection light sources adopt gatherer or the collector arrays secondary optics element as LED, and gatherer is with packaged LED is corresponding, and collector arrays is corresponding one by one with the array of packaged LED.
5. a LCD projection arrangement is characterized in that it has claim 1 or 2 described projecting optical engines, claim 3 and 4 described projection light sources.Because projecting optical engine, and the advantage of critical optical elements and projection light source, thereby technical advantage, life-span and the cost advantage of having given this projection arrangement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810045644A CN101634754A (en) | 2008-07-25 | 2008-07-25 | LCD projection optical engine adopting LED light source and projection device thereof |
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| CN200810045644A CN101634754A (en) | 2008-07-25 | 2008-07-25 | LCD projection optical engine adopting LED light source and projection device thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011113186A1 (en) * | 2010-03-19 | 2011-09-22 | 南阳首控光电有限公司 | High-brightness and large-sized screen tv |
| CN102853374A (en) * | 2012-08-24 | 2013-01-02 | 霍永峰 | LED (Light-Emitting Diode) stage lamp lens assembly and LED stage lamp |
| CN103207508A (en) * | 2012-11-14 | 2013-07-17 | 深圳市亿思达显示科技有限公司 | Liquid crystal projector |
| CN103592813A (en) * | 2013-11-15 | 2014-02-19 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
| CN103672615A (en) * | 2013-12-13 | 2014-03-26 | 中航华东光电有限公司 | Backlight module for imaging projection system |
| US9791132B2 (en) | 2011-12-11 | 2017-10-17 | Appotronics Corporation Limited | Light source and illuminating device |
| CN109270779A (en) * | 2018-11-27 | 2019-01-25 | 深圳市微阵技术有限公司 | Novel dynamic image projection system |
-
2008
- 2008-07-25 CN CN200810045644A patent/CN101634754A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011113186A1 (en) * | 2010-03-19 | 2011-09-22 | 南阳首控光电有限公司 | High-brightness and large-sized screen tv |
| US9791132B2 (en) | 2011-12-11 | 2017-10-17 | Appotronics Corporation Limited | Light source and illuminating device |
| CN102853374A (en) * | 2012-08-24 | 2013-01-02 | 霍永峰 | LED (Light-Emitting Diode) stage lamp lens assembly and LED stage lamp |
| CN102853374B (en) * | 2012-08-24 | 2015-03-18 | 霍永峰 | LED (Light-Emitting Diode) stage lamp lens assembly and LED stage lamp |
| CN103207508A (en) * | 2012-11-14 | 2013-07-17 | 深圳市亿思达显示科技有限公司 | Liquid crystal projector |
| CN103592813A (en) * | 2013-11-15 | 2014-02-19 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
| CN103592813B (en) * | 2013-11-15 | 2014-10-29 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
| CN103672615A (en) * | 2013-12-13 | 2014-03-26 | 中航华东光电有限公司 | Backlight module for imaging projection system |
| CN109270779A (en) * | 2018-11-27 | 2019-01-25 | 深圳市微阵技术有限公司 | Novel dynamic image projection system |
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Open date: 20100127 |