LED and laser projectors with solid state light engine Overview
As known, Christiaan Huygens invented the first projection device called "Magic Lantern" in the middle of the 17th century. Of course, modern projectors bear little resemblance to their prototypes. The rapid scientific and technological progress of the last century gave us a huge number of fundamentally new devices, including modern projectors. Introduction The models of the last century used powerful lamps as their light source. As known, the image quality directly depends on the lamp brightness. Therefore, they became the main object for improvements. Ultimately, in 1995 Philips was developed a high-pressure mercury arc lamp called UHP (Ultra-high-performance) projector lamp (projector bulb). Modern lamp projectors continue to use current modifications of UHP bulb. The development of the semiconductor industry has given projector developers access to relatively cheap and powerful LEDs. As a result, the market was quickly filled with a huge number of LED projectors. Moreover, the enthusiasm of the consumer market has sparked the development of ultra-portable and mini pocket projectors. Further development of semiconductors has created a new generation of laser LEDs. Of course, the projectors developers did not miss the new opportunity. As a result, the range on offer has rapidly expanded due to laser projectors. Moreover, phone manufacturers have even developed quite a few smartphones with a built-in laser projector. In Read the full article
