Study On The Generic Technology Of Practical Laser TV

In recent years, the demands of people on the visual, the pursuit of a morecolorful picture are increasing, which requires the display device can render richercolor images. In order to allow the display device to show more saturated and morecolors, the wide color gamut displays has become an important direction ofdevelopment. Laser display technology as the next generation of display technologyhas significant and incomparable advantages over other displays: wide color gamut,high color saturation, no harmful radiation and other electromagnetic radiation.Therefore, the laser display technology has been paid more and more attention. Bigscreen TV, projector and other laser products have sprung up again. In the world’slargest consumer electronics show CES (Consumer Electronics Show) exhibition in2013, laser display related equipment received a " future product award ", it alsomarks the laser display as a " fourth-generation display technology " has taken acrucial step.In another hand, these special advantages of laser TV also bring some problems,such as image speckle phenomenon, color distortion, high volume laser, low heatdissipation and so on. Only by resolving these problems, the unique advantages oflaser TV and the value of practical application will be presented.The common laser display technologies has been the object of intensive study inthis paper. The cause of laser speckle has been analyzed, several methods of laserspeckle reduction were compared, and proposed a way to reduce laser speckle using rotating Engineered Diffusers. This paper theoretically analyzed the feasibility of thisapproach. While the rotating Engineered Diffusers is uploaded in the optical system,the laser speckles on the screen were measured, the speckle contrast may be reducedto1.15%, people’s eyes can not tell the laser speckles which greatly enhance theviewing level laser TV. Compared with the conventional method, this method of therotating Engineered Diffusers is more efficient.A smaller volume of semiconductor lasers and solid-state lasers are used andcombined these13lasers into one fiber using fiber-coupled technology. This finalfiber emits16.1W “white” laser which is the laser light source of laser TV. And thelight source is integrated in the main laser TV, so that we can achieve theminiaturization of laser TV. Consider the size of the laser TV and LCD panel(EpsonL3C09W-85G00), the projection optical system has been designed to ensure the highimage quality so that the laser TV can achieve1080P HD video output.According to the chromaticity theory, the transformation matrix between lasertelevision gamut and ordinary NTSC color gamut is calculated, a "gamut recurrence"conversion model is established and realized by DSP and FPGA HD real-time "gamut recurrence". The laser TV also supports common video input interface.Provide a solution that laser TV can show the original NTSC gamut when theordinary television video signal is input.Speckles contrast, the gamut recurrence error, contrast and brightnesshomogeneity of laser TV are measured to verify the abilities of laser speckle reductionand color gamut recurrence, and proves the practical value of laser television.