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color wheel and are used with most common projection technologies, including single & 3-Chip DLP, LCD and LCoS. They offer numerous advantages, including eliminating the high cost and downtime of replacing lamps, variations in brightness and color that occur as lamps age and improved color fidelity. Typical laser light sources used in projectors are rated for 20,000 hours before the light output is reduced to 50%, whereas lamps lose brightness quickly and need to be replaced after as little as 1000–2000 hours.
38:
54:
202:
fiber-optic RGB laser racks can be placed far away from the projector, and several racks can be housed in a single, central room. Each projector can use up to two racks, and several monochrome lasers are mounted on each rack, the light of which is mixed and transmitted to the projector booth using optical fibers. Projectors using RB lasers use a blue laser with a phosphor wheel in conjunction with a conventional solid-state red laser.
243:
218:
large-venue models are increasingly common in boardrooms, auditoriums and other high-profile spaces, and models up to 75,000 lm are used in large staging applications such as concerts, keynote addresses and displays projected on buildings. Video projectors can have a mechanism similar to local backlight dimming to achieve higher contrast ratios by using 6 DLP chips: 3 for display, and 3 for local dimming.
304:
217:
lumens is suitable for small screens viewed in rooms with low ambient light; approximately 2500 to 4000 lm is suitable for medium-sized screens with some ambient light; over 4000 lm is needed for very large screens or use in rooms with no lighting control such as conference rooms. High brightness
492:
and many others. These units use a monochrome blue laser light source to excite a yellow phosphor medium creating a broad spectrum light (instead of incandescent or mercury vapor lamps used to create the broad spectrum light). This broadband spectrum light is then split into the primaries with a
201:
If a blue laser is used, a phosphor wheel is used to turn blue light into white light, which is also the case with white LEDs. (White LEDs do not use lasers.) A wheel is used in order to prolong the lifespan of the phosphor, as it is degraded by the heat generated by the laser diode. Remote
372:
simultaneously, and offer higher light output and more accurate color reproduction, however the cost is significantly higher and thus 3-chip DLP technology is typically used in large venue, high brightness models, as well as
Digital Cinema
158:
screens became quite popular, video projectors are still common among many home theater enthusiasts. In some applications, video projectors have been replaced with large monitors or LED screens, or their replacement has been explored.
556:. They build their projectors from kits, sourced components, or from scratch, using a television set, cellphone screen, or LED lighting as a light source. DIY construction plans can be obtained through the internet for domestic and
510:. Once dominated the video projection market, but given their limited light output, size, weight and need for complex alignment, they have since been displaced by digital projectors and are no longer being made.
360:(DMDs). The single- and double-DMD versions use rotating color wheels in time with the mirror refreshes to modulate color. The most common problem with the single- or two-DMD varieties is a visible “
915:
Kaczorowski, Andrzej; Gordon, George S.; Palani, Ananta; Czerniawski, Stanislaw; Wilkinson, Timothy D. (2015). "Optimization-Based
Adaptive Optical Correction for Holographic Projectors".
364:” which some people perceive when moving their eyes. More recent projectors with higher speed (2× or 4×) and otherwise optimized color wheels have lessened this effect. 3-chip
843:
167:
A video projector, also known as a digital projector, may project onto a traditional reflective projection screen, or it may be built into a cabinet with a translucent
119:
to provide the illumination required to project the image. Most modern projectors can correct any curves, blurriness and other inconsistencies through manual settings.
687:
253:
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light gates. This is the simplest system, making it one of the most common and affordable for home theaters and business use. Common problems include a visible
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1613:
761:
198:(1920Ă—1080 pixels), 4K UHD (3840Ă—2160), as well as 16:10 aspect ratio resolutions including WXGA+ (1280Ă—800 pixels) and WUXGA (1920Ă—1200 pixels).
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335:, leading to discolored spots or holes in the image, although recent advances have reduced the severity of these issues in some models.
205:
The cost of a projector is typically driven by its base technology, features, resolution and light output. A projector with a higher
213:) is required for a larger screen or for a room with more ambient light. For example, a light output of approximately 1500 to 2500
785:
805:
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suitable to make a small projection; a few more powerful "pico projectors" are pocket-sized, and many projectors are portable.
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projectors have been developed by
Microvision and Aaxa Technologies. Microvision projectors use Microvision's patented
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projectors use one of the above-mentioned technologies for image creation, with a difference that they use an array of
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17:
845:
Automated
Lighting: The Art and Science of Moving Light in Theatre, Live Performance, Broadcast, and Entertainment
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This article is about home and business projectors; for video projectors used in movie theaters, see
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712:"LG and Odeon Multicines Open World's First 100% LED Cinema with Dolby Atmos in Madrid - Boxoffice"
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Laser projectors are now available from most projector manufacturers, including
146:. In schools and other educational settings, they are sometimes connected to an
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Video projectors are used for many applications such as conference room
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888:"Christie to Sell Breakthrough Eclipse HDR Projector for Home Theaters"
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902:"Best Home Theater Projector of All Time? Meet the Christie Eclipse"
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A projector in a standard form factor: The PG-D2870 projector from
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as the light source, while image is processed with DLP (DMD) chip.
394:
JVC’s Direct-drive Image Light
Amplifier based on LCoS technology.
1544:
1194:
1159:
469:
1178:
477:
441:
laser beam-steering technology, whereas Aaxa
Technologies uses
786:"Christie 6P laser lights CGV's biggest screen in South Korea"
427:. Uses a combination of Light Emitting Diodes and 445 nm
1154:
959:"What's the difference between laser phosphor and RGB laser?"
738:"LED Screens for Theaters: Is the Buzzy Tech Worth the Cost?"
545:
465:
424:
391:
195:
183:
116:
85:
1010:"Supersize Your TV for $ 300: Build Your Own XGA Projector!"
762:"'Word-first' acoustic transparent LED cinema screen debuts"
412:
as the light source, negating the need for lamp replacement.
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688:"Interactive whiteboard projectors fading from classrooms"
549:
473:
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405:
324:
187:
105:
829:"Novel laser sources for large-venue projection markets"
384:, which enables correction of optical aberrations using
150:. In the late 20th century, they became commonplace in
331:, and the LCD panels deteriorating from heat and from
388:. Some commercially available technologies include:
271:, and by adding encyclopedic content written from a
1321:
Thick-film dielectric electroluminescent technology
539:
1614:Comparison of CRT, LCD, plasma, and OLED displays
1635:
662:"Christmas is a time for taking -- from schools"
659:
368:do not have this problem, as they display each
841:
400:Sony’s proprietary variant of LCoS technology.
380:). Such projectors often process light in the
1050:
190:(1024Ă—768 pixels), SXGA+ (1400Ă—1050 pixels),
76:and projects the corresponding image onto a
1268:Surface-conduction electron-emitter display
1179:Active-Matrix Organic light-emitting diode
1057:
1043:
984:"Building a TRUE 4k home cinema projector"
232:
519:LIA (light image amplifier) light valves.
291:Learn how and when to remove this message
171:to form a single unified display device.
27:Device that projects video onto a surface
735:
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52:
36:
14:
1636:
1064:
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252:contains content that is written like
1038:
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57:An image from a video projector in a
1315:Ferroelectric liquid crystal display
660:Charles Proctor (January 18, 2007).
236:
1389:Light-emitting electrochemical cell
1008:Völkel, Frank (November 14, 2004).
349:technology. This uses one to three
24:
1588:Large-screen television technology
611:Large-screen television technology
329:“screen door” or pixelation effect
25:
1685:
1262:Organic light-emitting transistor
1625:Comparison of display technology
736:Giardina, Carolyn (2023-04-15).
575:Comparison of display technology
241:
1256:Electroluminescent Quantum Dots
1020:from the original on 2010-12-29
1001:
975:
951:
908:
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866:
806:"Christie RGB laser projection"
540:Do-it-yourself video projectors
1327:Laser-powered phosphor display
874:"Barco XDL-4K75 DLP Projector"
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13:
1:
1593:Optimum HDTV viewing distance
1583:History of display technology
1471:Computer-generated holography
917:Journal of Display Technology
646:
88:projectors use a very bright
1173:Organic light-emitting diode
1167:Light-emitting diode display
7:
563:
358:digital micromirror devices
162:
90:ultra-high-performance lamp
10:
1690:
1649:Electronic display devices
1383:Vacuum fluorescent display
1107:Electroluminescent display
29:
1622:
1570:
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1436:
1340:
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1230:Liquid crystal on silicon
1134:
1081:
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378:liquid crystal on silicon
311:1200 CRT-projector-based
134:, having mostly replaced
108:or solid state blue, RB,
1421:Fourteen-segment display
1224:Digital Light Processing
937:10.1109/JDT.2015.2418436
590:Digital Light Processing
47:Digital Light Processing
1427:Sixteen-segment display
1113:Rear-projection display
842:Richard Cadena (2006).
606:Inflatable movie screen
233:Projection technologies
194:(1280Ă—720 pixels), and
1669:Television terminology
1274:Field-emission display
1189:Liquid-crystal display
742:The Hollywood Reporter
548:build do-it-yourself (
316:
169:rear-projection screen
148:interactive whiteboard
130:, movie theaters, and
126:, classroom training,
61:
50:
1411:Eight-segment display
1405:Seven-segment display
498:Obsolete technologies
410:Light Emitting Diodes
306:
273:neutral point of view
56:
40:
1533:Display capabilities
1416:Nine-segment display
1118:Plasma display panel
716:www.boxofficepro.com
535:oil-film projectors.
516:oil-film projectors.
423:system developed by
1562:See-through display
1466:Holographic display
1144:Quantum dot display
929:2015JDisT..11..596K
525:-CRT, developed by
386:Zernike polynomials
265:promotional content
176:display resolutions
1644:Digital technology
1604:Color Light Output
1598:High Dynamic Range
1400:Dot-matrix display
1395:Lightguide display
1066:Display technology
636:Screen door effect
621:Projection mapping
616:Live event support
601:Holographic screen
596:Handheld projector
317:
309:Zenith Electronics
267:and inappropriate
227:built-in projector
62:
51:
1631:
1630:
1557:Always-on display
1348:Electromechanical
1336:
1335:
859:978-0-240-80703-4
667:Los Angeles Times
626:Projection screen
508:cathode ray tubes
376:LCoS projectors (
343:Texas Instruments
301:
300:
293:
154:. Although large
142:and conventional
102:metal halide lamp
78:projection screen
16:(Redirected from
1681:
1659:Office equipment
1609:Flexible display
1571:Related articles
1451:Autostereoscopic
1150:Electronic paper
1096:Cathode-ray tube
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552:) projectors at
458:Christie Digital
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254:an advertisement
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94:mercury arc lamp
72:that receives a
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18:Video projectors
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1514:Slide projector
1504:Movie projector
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852:. p. 344.
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351:microfabricated
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144:film projectors
70:image projector
66:video projector
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1014:Tom's Hardware
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923:(7): 596–603.
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382:Fourier domain
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269:external links
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156:LCD television
98:Xenon arc lamp
32:digital cinema
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1519:Transparency
1492:Static media
1446:Stereoscopic
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718:. 2023-11-27
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665:
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443:laser diodes
429:laser diodes
354:light valves
313:home theater
287:
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263:by removing
259:Please help
251:
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207:light output
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74:video signal
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1483:Fog display
1456:Multiscopic
1373:Fiber-optic
1285:Quantum dot
982:DIY Perks.
850:Focal Press
766:AV Magazine
527:Kloss Video
435:Laser diode
421:laser diode
373:projectors.
152:home cinema
128:home cinema
114:fiber-optic
92:(a special
59:home cinema
1664:Projectors
1654:Home video
1638:Categories
1524:Laser beam
1478:Volumetric
1438:3D display
1378:Nixie tube
1358:Split-flap
1243:generation
1217:Blue Phase
1137:generation
1084:generation
1024:2022-12-27
968:2023-06-24
814:2023-12-28
791:2023-12-28
771:2024-08-01
747:2024-08-01
722:2024-08-01
697:2024-08-01
673:2010-11-26
647:References
315:, ca. 2006
261:improve it
223:camcorders
49:technology
1578:Scan line
1552:DisplayID
1509:Neon sign
1499:Monoscope
1341:Non-video
1102:Jumbotron
993:23 August
692:The Blade
558:classroom
554:low costs
546:hobbyists
490:Viewsonic
482:Panasonic
182:(800Ă—600
1461:Hologram
1368:Eggcrate
1353:Flip-dot
1299:display
1280:Laser TV
1251:microLED
1181:(AMOLED)
1135:Current
1091:Eidophor
1018:Archived
945:24142134
564:See also
514:Eidophor
281:May 2020
178:include
163:Overview
136:overhead
132:concerts
84:system.
80:using a
1545:CEA-861
1175:(OLED)
1160:Gyricon
988:Youtube
925:Bibcode
533:Talaria
523:Schmidt
470:Hitachi
445:+ LCoS.
415:Hybrid
362:rainbow
356:called
225:have a
174:Common
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1323:(TDEL)
1317:(FLCD)
1264:(OLET)
1232:(LCoS)
1191:(LCD)
1169:(LED)
1146:(QLED)
1120:(PDP)
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506:using
478:Optoma
341:using
323:using
221:A few
211:lumens
184:pixels
117:lasers
68:is an
1600:(HDR)
1423:(FSD)
1407:(SSD)
1391:(LEC)
1385:(VFD)
1329:(LPD)
1276:(FED)
1270:(SED)
1241:Next
1226:(DLP)
1155:E Ink
1109:(ELD)
1098:(CRT)
941:S2CID
809:(PDF)
592:(DLP)
560:use.
544:Some
466:Epson
454:Canon
450:Barco
425:Casio
392:D-ILA
196:1080p
140:slide
86:Video
43:Sharp
1540:EDID
1362:Vane
1308:TMOS
1303:IMoD
1297:MEMS
1124:ALiS
1082:Past
995:2023
854:ISBN
570:3LCD
486:Sony
462:Dell
439:MEMS
419:and
398:SXRD
215:ANSI
192:720p
180:SVGA
82:lens
1212:LED
1205:IPS
1195:TFT
933:doi
550:DIY
474:NEC
417:LED
406:LED
347:DLP
325:LCD
188:XGA
186:),
112:or
110:RGB
106:LED
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