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Laser TV is a proposed new video display technology using laser optoelectronics. Laser TVs may be commercially available in late 2007.[1]

SYCO of China released a 120-inch Laser TV, the biggest in the world so far, and it will be used in cinema in late 2007.[1]

Technology

Lasers may become an ideal replacement for the UHP lamps[2] which are currently in use in projection display devices such as rear projection TV and front projectors. Current televisions are capable of displaying only half of the visible spectrum of colors.[3] In contrast, proponents of Laser TV technology claim that the standard will be able to reproduce more than 90% of the colors visible to the human eye.

A laser TV requires lasers in three distinct wavelengths: Red, Green and Blue. While red laser diodes are commercially available, there are no commercially available green and blue laser diodes which can provide the required power at room temperature with an adequate life time. Instead frequency doubling can be used to provide the blue and green wavelengths. Several types of lasers can be used as the frequency doubled sources: fiber lasers, inter cavity doubled lasers, external cavity doubled lasers, eVCSEL’s and OPSL’s (Optically Pumped Semiconductor Lasers). Among the inter cavity doubled lasers VCSEL’s have shown much promise and potential to be the basis for a mass produced frequency doubled laser.

A VECSEL is a vertical cavity, and is composed of two mirrors. On top of one of them is a diode as the active medium. These lasers combine high overall efficiency with good beam quality. The light from the high power IR-laser diodes is converted into visible light by means of extra-cavity waveguided second harmonic generation. Laser-pulses with about 10 kHz repetition rate and various lengths are sent to a Digital Micromirror Device where each mirror directs the pulse either onto screen or into the dump. Because of the well known wavelengths all coatings can be optimized to reduce reflections and therefore speckle.

Advantages

One major claim of laser advocates is the ability to produce undiluted, perfect colors allowing precise hue mixing. With the color enhancement capable with lasers, up to 90% of the visible spectrum can be displayed.[4] Other improvements that laser advocates claim are bulbs that will never blow out, and increased efficiency by using two-thirds less power than traditional rear projection televisions.[3]. Historically, however, lasers have been too bulky and expensive for widespread adoption.

The laser technology advocates claim that the technology will allow displays with a richer, more vibrant color palette than the conventional plasma, LCD or CRT displays.[3]

They also claim the displays will:[5]
  • be half the weight and cost of Plasma or LCD displays
  • require around 25% of the power required by Plasma or LCD displays
  • be very thin like Plasma and LCD displays are today
  • have a very wide colour gamut
  • have a 50,000 hour life
  • maintain full power output for the lifespan of the laser, resulting in a picture that doesn't progressively degrade over time, such as with plasma and LCD technology

Drawbacks

Together with the advantages of laser sources, there are reports that also describe some of the current shortcomings of laser displays,[6] such as the following:
  • Safety. The high power emitted by the coherent laser sources is inherently dangerous to human vision. Proponents claim that integrating the devices with the needed diffusion filters removes this risk.
  • Speckle. Due to the narrowband coherent light source, speckle will be an issue at the display. This has also been a problem in laser lighting displays and has been solved through modulation of the light source thus widening the bandwidth and reducing the possibility for coherent interference. Proponents claim that this issue can be minimized by the use of diffusing elements and multiple sources. These, however, may impact displayed resolution and system cost.

Controversy

Some have questioned the credibility of Laser TV development efforts. Apparently, some information regarding Laser TV developments can be traced to the pre-IPO publicity campaign of Arasor[7] [8] [9] [10], and its partner, Novalux.[11]

A number of major consumer TV manufacturers have indicated that they have no plans to incorporate Laser TV technology into their product ranges.[12]

A reversal by Mitsubishi saying that they in fact do plan a Laser TV offering[13]

To the contrary however, companies such as Novalux have shown what appear to be viable demonstrations at industry conferences such as SID and CES.[14] [15]

External links

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References

1. ^ Laser TV Technology: Plasma and LCD Killer. Gizmodo (2006-10-11). Retrieved on 2007-01-04.
2. ^ "The Technology Behind the Display", Novalux. Retrieved on 2007-09-04. 
3. ^ Morgenstern, Steve (2007). "Laser-Sharp Color". Popular Science 270 (1). 
4. ^ The Technology Behind the Display: Display Applications: Home Theater. Novalux. Retrieved on 2007-05-15.
5. ^ Forget plasma and LCD TV - the Laser TV is coming!. iTWire (2006-10-11). Retrieved on 2007-01-04.
6. ^ Brennesholtz, et al (2005-08-19). "Laser Projection Systems" (PDF). Insight Media. Retrieved on 2007-01-29.
7. ^ Mitsubishi PR/Marketing Ignorant of Laser TV 6 Months After Own Press Release. Smarthouse (2007-01-04). Retrieved on 2007-01-04.
8. ^ Mitsubishi Press Release Announcing Laser HDTV Demonstration. Mitsubishi (2006-04-07). Retrieved on 2007-01-04.
9. ^ More Problems For Laser TV Company Arasor. Smarthouse (2007-01-04). Retrieved on 2007-01-04.
10. ^ "Laser TV unveiled in Australia'", CNET.com.au, 2006-10-11. Retrieved on 2006-11-29. 
11. ^ Laser TV: The Next Gen Screen?. Red Herring (2006-10-10). Retrieved on 2007-01-04.
12. ^ "Laser TV 'no plasma killer'", Sydney Morning Herald, 2006-10-19. Retrieved on 2006-10-23. 
13. ^ "Laser TV Is Coming CES 2008", SmartHouse, 2007-06-25. Retrieved on 2007-07-10. 
14. ^ "NOVALUX TO DEMONSTRATE HIGH-DEFINITION LASER TV DURING SOCIETY FOR INFORMATION DISPLAY 2006", 2006-05-25. Retrieved on 2007-01-29. 
15. ^ "Novalux to Demo Laser-Based HDTVs at CES", PC Magazine, 2007-01-04. Retrieved on 2007-01-29. 


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Display technology
Non-videoElectronic paper | Flip-dot display | Split-flap display | Incandescent matrix display
VideoCathode ray tube | DLP | Field emission display | Laser TV | LED | LCD | OLED | Plasma display | Surface-conduction electron-emitter display | Vacuum fluorescent display
3D displayStereoscopic, s.a. Autostereoscopic | Volumetric, s.a. Laser beam
Static mediaHologram | Movie projector | Neon sign | Slide projector
Optoelectronics is the study and application of electronic devices that interact with light, and thus is usually considered a sub-field of photonics. In this context, light often includes invisible forms of radiation such as gamma rays, X-rays, ultraviolet and infrared.
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Simon Cowell (born 7 October, 1959) is a British artist and repertoire ("A&R") executive for Sony BMG in the United Kingdom and a television producer, more commonly known as a judge on television programmes such as Pop Idol, The X Factor, American Idol
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High-intensity discharge (HID) lamps include these types of electrical lamps: mercury vapor, metal halide (also HQI), high-pressure sodium (Son), low-pressure sodium (Sox) and less common, xenon short-arc lamps.
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In physics, wavelength is the distance between repeating units of a propagating wave of a given frequency. It is commonly designated by the Greek letter lambda (λ). Examples of wave-like phenonomena are light, water waves, and sound waves.
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Second harmonic generation (SHG; also called frequency doubling) is a nonlinear optical process, in which photons interacting with a nonlinear material are effectively "combined" to form new photons with twice the energy, and therefore twice the frequency and half the
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Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. The name means "below red" (from the Latin infra, "below"), red being the color of visible light with the longest wavelength.
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Second harmonic generation (SHG; also called frequency doubling) is a nonlinear optical process, in which photons interacting with a nonlinear material are effectively "combined" to form new photons with twice the energy, and therefore twice the frequency and half the
..... Click the link for more information.
Meanings of DMD:
  • DMD Events; a Swiss Party Label link: http://www.dmd-events.ch
  • Short for Dendermonde, a city in Belgium
  • Digital Mars D Compiler for the D programming language.

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palette, in computer graphics, is a designated subset of the total range of colors supported by a computer graphics system. Each color in the palette is assigned a number, and for each pixel, one of these numbers is stored. This number determines the color of the pixel.
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plasma display panel (PDP) is a type of flat panel display now commonly used for large TV displays (typically above 37-inch or 940 mm). Many tiny cells located between two panels of glass hold an inert mixture of noble gases (neon and xenon).
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liquid crystal display (commonly abbreviated LCD) is a thin, flat display device made up of any number of color or monochrome pixels arrayed in front of a light source or reflector.
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1. Electron guns 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red, green, and blue part of displayed image 7.
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gamut, or color gamut (pronounced /ˈgæmət/), is a certain complete subset of colors. The most common usage refers to the subset of colors which can be accurately represented in a given circumstance,
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Coherence is the property of wave-like states that enables them to exhibit interference. It is also the parameter that quantifies the quality of the interference (also known as the degree of coherence).
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Narrowband refers to a situation in radio communications where the bandwidth of the message does not significantly exceed the channel's coherence bandwidth. It is a common misconception that narrowband refers to a channel which occupies only a "small" amount of space on the radio
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Coherence or coherent can refer to:
  • Coherence (cognitive science), a property of mental/cognitive states
  • Coherence (linguistics), what makes a text semantically meaningful
  • Coherence (physics), a property of waves
  • Quantum coherence

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speckle pattern is a random intensity pattern produced by the mutual interference of coherent wavefronts that are subject to phase differences and/or intensity fluctuations.
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laser lighting display or laser light show involves the use of laser light to entertain an audience. A laser light show may consist only of projected laser beams set to music, or may accompany another form of entertainment, typically a rock concert or other musical
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Resolution may refer to: the ending of a story, or a conflict in the story fixed
  • Resolution (law), a written motion adopted by a deliberative body.
  • Resolution (music), a technique in music theory.

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Sid may refer to:

People

  • Sid (band), Visual Kei band
  • Sid Caesar, actor and comedian
  • Sid Eudy, professional wrestler
  • Sid Field, English comedy entertainer
  • Sid Hartman, columnist for the Minneapolis Star Tribune

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The International Consumer Electronics Show (CES) is a trade show held each January in Las Vegas, Nevada, and is sponsored by the Consumer Electronics Association. At the show, many previews of products are introduced, or new products are announced.
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Not to be confused with Gizmondo.


Gizmodo is a popular[1] technology weblog about consumer electronics. It is part of the Gawker Media network run by Nick Denton.
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Mitsubishi Group
三菱グループ

Public, keiretsu (traded on the Tokyo Stock Exchange)
Founded 1870
Headquarters Japan

Industry Conglomerate

The Mitsubishi Group
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A red herring is a metaphor for a diversion or distraction from an original objective. An example can be found in academic examinations, particularly in mathematics and physical sciences.
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Electronic paper, also called e-paper, is a display technology designed to mimic the appearance of ordinary ink on paper. Unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, electronic paper reflects light like ordinary paper and is
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flip-disc display (or flip-dot display) is a display technology used for large outdoor signs, normally those that will be exposed to direct sunlight. Flip-disc displays were common in the 1980s and 90s, but have since become rare with the introduction of high-intensity LEDs.
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split-flap display, sometimes simply flap display, is a display device that presents alphanumeric text, and possibly fixed graphics.

Description

Each character position or graphic position has a collection of flaps on which the characters or graphics are painted or
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Video (Latin for "I see", first person singular present, indicative of videre, "to see") is the technology of electronically capturing, recording, processing, storing, transmitting, and reconstructing a sequence of still images representing scenes in motion.
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1. Electron guns 2. Electron beams 3. Focusing coils 4. Deflection coils 5. Anode connection 6. Mask for separating beams for red, green, and blue part of displayed image 7.
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For , see .


Digital Light Processing (DLP) is a technology used in projectors and video projectors. It was originally developed at Texas Instruments, in 1987 by Dr. Larry Hornbeck.
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