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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.
27:
43:
191:
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.
232:
207:
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.
293:
206:
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
481:
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
190:
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
361:
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
147:
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.
545:. 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
499:. 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.
349:(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 “
904:
Kaczorowski, Andrzej; Gordon, George S.; Palani, Ananta; Czerniawski, Stanislaw; Wilkinson, Timothy D. (2015). "Optimization-Based
Adaptive Optical Correction for Holographic Projectors".
353:” 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
832:
156:
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
108:
to provide the illumination required to project the image. Most modern projectors can correct any curves, blurriness and other inconsistencies through manual settings.
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242:
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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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1602:
750:
187:(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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324:, leading to discolored spots or holes in the image, although recent advances have reduced the severity of these issues in some models.
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The cost of a projector is typically driven by its base technology, features, resolution and light output. A projector with a higher
202:) is required for a larger screen or for a room with more ambient light. For example, a light output of approximately 1500 to 2500
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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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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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701:"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
135:. 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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877:"Christie to Sell Breakthrough Eclipse HDR Projector for Home Theaters"
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891:"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.
383:
JVC’s Direct-drive Image Light
Amplifier based on LCoS technology.
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laser beam-steering technology, whereas Aaxa
Technologies uses
775:"Christie 6P laser lights CGV's biggest screen in South Korea"
416:. Uses a combination of Light Emitting Diodes and 445 nm
1143:
948:"What's the difference between laser phosphor and RGB laser?"
727:"LED Screens for Theaters: Is the Buzzy Tech Worth the Cost?"
534:
454:
413:
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172:
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999:"Supersize Your TV for $ 300: Build Your Own XGA Projector!"
751:"'Word-first' acoustic transparent LED cinema screen debuts"
401:
as the light source, negating the need for lamp replacement.
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677:"Interactive whiteboard projectors fading from classrooms"
538:
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818:"Novel laser sources for large-venue projection markets"
373:, which enables correction of optical aberrations using
139:. In the late 20th century, they became commonplace in
320:, and the LCD panels deteriorating from heat and from
377:. Some commercially available technologies include:
260:, and by adding encyclopedic content written from a
1310:
Thick-film dielectric electroluminescent technology
528:
1603:Comparison of CRT, LCD, plasma, and OLED displays
1624:
651:"Christmas is a time for taking -- from schools"
648:
357:do not have this problem, as they display each
830:
389:Sony’s proprietary variant of LCoS technology.
369:). Such projectors often process light in the
1039:
179:(1024Ă—768 pixels), SXGA+ (1400Ă—1050 pixels),
65:and projects the corresponding image onto a
1257:Surface-conduction electron-emitter display
1168:Active-Matrix Organic light-emitting diode
1046:
1032:
973:"Building a TRUE 4k home cinema projector"
221:
508:LIA (light image amplifier) light valves.
280:Learn how and when to remove this message
160:to form a single unified display device.
16:Device that projects video onto a surface
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41:
25:
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241:contains content that is written like
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46:An image from a video projector in a
1304:Ferroelectric liquid crystal display
649:Charles Proctor (January 18, 2007).
225:
1378:Light-emitting electrochemical cell
997:Völkel, Frank (November 14, 2004).
338:technology. This uses one to three
13:
1577:Large-screen television technology
600:Large-screen television technology
318:“screen door” or pixelation effect
14:
1674:
1251:Organic light-emitting transistor
1614:Comparison of display technology
725:Giardina, Carolyn (2023-04-15).
564:Comparison of display technology
230:
1245:Electroluminescent Quantum Dots
1009:from the original on 2010-12-29
990:
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795:"Christie RGB laser projection"
529:Do-it-yourself video projectors
1316:Laser-powered phosphor display
863:"Barco XDL-4K75 DLP Projector"
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1:
1582:Optimum HDTV viewing distance
1572:History of display technology
1460:Computer-generated holography
906:Journal of Display Technology
635:
77:projectors use a very bright
1162:Organic light-emitting diode
1156:Light-emitting diode display
7:
552:
347:digital micromirror devices
151:
79:ultra-high-performance lamp
10:
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1638:Electronic display devices
1372:Vacuum fluorescent display
1096:Electroluminescent display
18:
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1219:Liquid crystal on silicon
1123:
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367:liquid crystal on silicon
300:1200 CRT-projector-based
123:, having mostly replaced
97:or solid state blue, RB,
1410:Fourteen-segment display
1213:Digital Light Processing
926:10.1109/JDT.2015.2418436
579:Digital Light Processing
36:Digital Light Processing
1416:Sixteen-segment display
1102:Rear-projection display
831:Richard Cadena (2006).
595:Inflatable movie screen
222:Projection technologies
183:(1280Ă—720 pixels), and
1658:Television terminology
1263:Field-emission display
1178:Liquid-crystal display
731:The Hollywood Reporter
537:build do-it-yourself (
305:
158:rear-projection screen
137:interactive whiteboard
119:, movie theaters, and
115:, classroom training,
50:
39:
1400:Eight-segment display
1394:Seven-segment display
487:Obsolete technologies
399:Light Emitting Diodes
295:
262:neutral point of view
45:
29:
1522:Display capabilities
1405:Nine-segment display
1107:Plasma display panel
705:www.boxofficepro.com
524:oil-film projectors.
505:oil-film projectors.
412:system developed by
1551:See-through display
1455:Holographic display
1133:Quantum dot display
918:2015JDisT..11..596K
514:-CRT, developed by
375:Zernike polynomials
254:promotional content
165:display resolutions
1633:Digital technology
1593:Color Light Output
1587:High Dynamic Range
1389:Dot-matrix display
1384:Lightguide display
1055:Display technology
625:Screen door effect
610:Projection mapping
605:Live event support
590:Holographic screen
585:Handheld projector
306:
298:Zenith Electronics
256:and inappropriate
216:built-in projector
51:
40:
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1546:Always-on display
1337:Electromechanical
1325:
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848:978-0-240-80703-4
656:Los Angeles Times
615:Projection screen
497:cathode ray tubes
365:LCoS projectors (
332:Texas Instruments
290:
289:
282:
143:. Although large
131:and conventional
91:metal halide lamp
67:projection screen
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1648:Office equipment
1598:Flexible display
1560:Related articles
1440:Autostereoscopic
1139:Electronic paper
1085:Cathode-ray tube
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83:mercury arc lamp
61:that receives a
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841:. p. 344.
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133:film projectors
59:image projector
55:video projector
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87:Xenon arc lamp
21:digital cinema
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1481:Static media
1435:Stereoscopic
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707:. 2023-11-27
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432:laser diodes
418:laser diodes
343:light valves
302:home theater
276:
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252:by removing
248:Please help
240:
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196:light output
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63:video signal
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1472:Fog display
1445:Multiscopic
1362:Fiber-optic
1274:Quantum dot
971:DIY Perks.
839:Focal Press
755:AV Magazine
516:Kloss Video
424:Laser diode
410:laser diode
362:projectors.
141:home cinema
117:home cinema
103:fiber-optic
81:(a special
48:home cinema
1653:Projectors
1643:Home video
1627:Categories
1513:Laser beam
1467:Volumetric
1427:3D display
1367:Nixie tube
1347:Split-flap
1232:generation
1206:Blue Phase
1126:generation
1073:generation
1013:2022-12-27
957:2023-06-24
803:2023-12-28
780:2023-12-28
760:2024-08-01
736:2024-08-01
711:2024-08-01
686:2024-08-01
662:2010-11-26
636:References
304:, ca. 2006
250:improve it
212:camcorders
38:technology
1567:Scan line
1541:DisplayID
1498:Neon sign
1488:Monoscope
1330:Non-video
1091:Jumbotron
982:23 August
681:The Blade
547:classroom
543:low costs
535:hobbyists
479:Viewsonic
471:Panasonic
171:(800Ă—600
1450:Hologram
1357:Eggcrate
1342:Flip-dot
1288:display
1269:Laser TV
1240:microLED
1170:(AMOLED)
1124:Current
1080:Eidophor
1007:Archived
934:24142134
553:See also
503:Eidophor
270:May 2020
167:include
152:Overview
125:overhead
121:concerts
73:system.
69:using a
1534:CEA-861
1164:(OLED)
1149:Gyricon
977:Youtube
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522:Talaria
512:Schmidt
459:Hitachi
434:+ LCoS.
404:Hybrid
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345:called
214:have a
163:Common
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495:using
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312:using
210:A few
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173:pixels
106:lasers
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549:use.
533:Some
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443:Canon
439:Barco
414:Casio
381:D-ILA
185:1080p
129:slide
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1071:Past
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475:Sony
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428:MEMS
408:and
387:SXRD
204:ANSI
181:720p
169:SVGA
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1194:IPS
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539:DIY
463:NEC
406:LED
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