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LASER TV

Laser TV is a new display technology and image projection based optoelectronics.

For some time the laser is seen as an excellent replacement for UHP lamps currently used in imaging devices, primarily for its level of color saturation, high efficiency in light generation and longer life. On the other hand, lasers have always been bulky and expensive to adopt on a large scale.

This new technology complements the existing models based on LCD, Plasma or DLP (Digital Light Processing English), offering a new alternative quality and ready for high definition television (HDTV).

This technology is based on the chip GLV (Grating Light Valve acronym) as a cornerstone of the system, which is also known as television or GLV TV.

The operation of laser technology for television is based on the combination of a number of elements through which the laser light (one for each primary color component RGB) it is in different ways until, finally, to the screen , displaying the image through it.

 

 

 

 

 

 

 

 

 

 

 

 

 

The progress of the pixels on the screen comes from the three lasers that emit a beam of each of the three primary colors (red, green and blue).

The red laser has been used in computer and electronic applications for some time, so it is a technology tested and implemented. However, this does not apply in the case of lasers that emit wavelengths in blue and green. The radiation from these colors has a shorter wavelength, and is still working on the development of semiconductor devices to achieve good results in the field of the image, as it is important that the beam emitted power is correct.

The development of other technologies that use lasers such as Blu-ray or HD DVD has greatly contributed in making good emitters of other colors other than red.

For example, it has made great progress in blue laser research, although the applications in this area (reading / writing data on magnetic media) are quite different.

These beams can be constructed televisions lighter and lower power. The depth of the screen is also smaller, since the entire projection system is "condensed" at the bottom of the screen, something that gives a serious advantage over other competing technologies.

The main component which is based around the operation of the television system called Grating Light Valve.

This is a valve comprised of six grids coated with a reflective material, three of them fixed and the other remaining mobile. The three moving grids move according to the input voltage. If these are subject to the maximum voltage, line up perfectly with the three fixed grids, diffracting the maximum amount of incident laser light (which correspond to the value 255). However, if the input voltage is the minimum, non-diffracted (reflected completely) that color.

Inside of a laser television is a GLV for each color component of the 1080 pixels that are drawn simultaneously on the screen (3240 total).

 

 

 

 

 

 

 

 

 

 

 

 

 

The laser light diffracted by each component RGB GLV valve reaches a lens responsible for collecting and discarding the reflected light. This separation is achieved through a Fourier filter.

Once the scattered light is collected by the lens, making the final combination of the three RGB primary colors to form the final beam corresponding to the color of the pixel.

Before reaching the scanning mirror, the laser light passes through a projection lens, to give enough power and avoid on-screen display that could occur if the beam intensity was too low.

Each of the laser beams that we discussed in previous sections (1080 total) impact on the scanning mirror. The mirror rotates about a vertical axis so that it can traverse the screen from left to right to go to different drawing horizontal lines on the screen.

In the first step of the sweep, the mirror draw a horizontal line on screen until 1080 of them and get the image on the screen.

The main difference with respect to the system already in place is that rather than be swept by horizontal lines drawn across a vertical line at a time.

With respect to the refresh of the screen is 60 Hz (frames per second) and each pixel is changed to a frequency of 115 kHz (switching frequency at which each valve GLV).

As a result we get a final image brighter and clearer. Moreover, by the very electronics implemented in the system, the screens are lightweight and very thin (much more than LCD or Plasma).

It is expected that new TVs based on laser light to compete on price with the systems already in place.

As an advantage, has the lightness and thinness of the displays and, according to its creators, with a higher image quality. In contrast with both LCD screens, such as plasma screens, take some time on the market and, in the eyes of the public, are seen as more mature systems.

In short, the laser television system based on GLV seems an important step as it is implemented in a smaller space than necessary in previous systems and, apparently, with a quality at least equal if not superior.

All that remains to be seen is the acceptance that the market offers this new technology, and at this stage is influenced by many factors rather than the purely technological.

Play in its favor the proliferation of home theater systems and a greater demand for quality by users, when watching television at home, as well as the gradual introduction of HDTV (with which the laser is compatible television).

MindSmack Corporation will be the first company to implement the laser displays on laptops.

 

Necsel Technology

 

Novalux is a company located in Silicon Valley that created the technology of laser "Necsel", a type of semiconductor laser that has the necessary physical and optical properties at a cost ideal for viewing images in widespread use. According to Novalux, its new laser screens have the following specifications:

* Provide a richer color palette and intense than conventional plasma displays, LCD and CRT

* Be half the weight and cost of plasma displays

* Require around 25% of the power required by plasma displays

* Be very slim like plasma and LCD displays are today

* Have a very wide color gamut, which can produce up to 90% of the colors a human eye can perceive; Twice that of current HDTVs

* Have a very long life, a lifespan of 50,000 hours

Since this type of laser is compact, light and inexpensive, can be used in screens of cell phones and PDAs. The device can also project images onto any wall keeping the same color quality and brightness. Some major TV manufacturers have indicated they have no plans to incorporate laser technology to its product line.