Sometimes I wonder how technologies work? However, that is how man invents these technologies. They are all amazing.
We all know about television, without it our day is incomplete. Television is not only a technology but it entertains people through the programmes aired on it. This television has evolved into various stages from ancient times to today. Even today, its future technology is still experimental. Over the years, television has evolved into various stages. LED, and LCD are the most important steps in TV technology. We all know its two stages, but there is another stage. Color laser television (laser television) or laser color video display is a type of television that uses two or more individually modulated optical (laser) beams of different colours to create a composite dot that is scanned and projected across the picture plane. Polygonal mirror system or less effectively by optoelectronic means to produce a colour television screen. The systems work either by scanning the entire image point by point and directly modulating the laser at high frequency, similar to electron beams in an electron beam tube, or by optically splitting the laser and then modulating and scanning line by line, the line itself is modulated in the same way as in digital light processing. A special single-beam housing reduces the system to a monochrome display, like a black-and-white TV. This principle applies to both direct display and laser projectors. Laser television technology began to emerge in the 1990s.
In the 21st century, the rapid development and maturity of semiconductor lasers and other technologies have given it new advantages. A laser source for a television or video monitor was originally proposed by Helmut K. V. Lotsch. In December 1977 H. K. V. Lotsch and F. Schroeter explained laser colour television for conventional and projection type systems and gave examples of possible applications. 18 years later, the German company Schneider AG presented a working laser television prototype at IFA’95 in Germany. However, due to the bankruptcy of Schneider AG, the prototype was never developed into a market-ready product. Laser light technology proposed in 1966 was too expensive to be used in commercially viable consumer products. Mitsubishi, Digital Electronics America, a key player in the high-performance red laser [9] and large-screen HDTV markets, announced its first commercial laser TV 65. Later, in 2013, LG launched a front-projection laser TV as a consumer. a product that displays 100-inch images and video with Full HD resolution 1920 x 1080 pixels. Laser TV images are reflected from the screen and enter the human eye for imaging. The principle of laser TV is to use DLP technology to display the image. Lasers can become an ideal replacement for UHP lamps currently used in projection screen equipment such as rear projectors and front projectors. Current televisions can only display 40% of the range of colours that humans can perceive. Colour television requires three different wavelengths of light – red, green and blue. Laser TVs consume less energy than LCD TVs of the same size. Lasers are the most expensive components of laser TVs. Advanced laser diodes typically require more semiconductor materials to produce, so cost reduction is a question of near-future industrialisation of laser television. The actual technology of laser television has already been successfully applied to other display devices in use. One example is a digital projector for showing digital movies in movie theaters. Although it uses much more powerful lasers, the projector works exactly the same.