![]() Motion looked natural too, and there really didn’t appear to be any significant levels of rainbow effect. They looked phenomenally sharp and detailed, with very good contrast and impressively uniform brightness levels, with none of the light ‘hot spots’ that used to trouble so many rear projection TVs. In some ways the pictures from the Mitsubishi laser rear projection TV were eye-catching. Which should result in minimal if any sign of DLP’s rainbow effect. The full HD screen is driven by DLP technology and three lasers, one each for the red, green and blue colour elements. For while the 75in laser rear projection TV certainly doesn’t stick out as far as old CRT TVs or even most previous rear projection TVs, it’s certainly much deeper than any current flat TV, making wall-hanging a near impossibility. Not surprisingly, though, the slimness does not extend to the set’s rear. These are all potentially significant advantages, and it was pleasing, too, to see that from the front, at least, the Mitsubishi TV had managed to keep up with the LCD Joneses by sporting a very slim bezel. Effectively the entire life of the product. Furthermore, whereas you’re lucky if conventional bulbs last for more than 4,000 hours, the lasers driving the 75in rear-pro TV Mitsubishi had on display are reckoned to last for 40,000 hours. ![]() This technology is laser lighting, which replaces the normal bulb illumination technologies to deliver what Mitsubishi claims is a very colour-rich picture while using much less power than conventional bulbs. But there, enjoying pride of place on the stand of Mitsubishi Electric, was not only a brand new, unapologetically massive rear projection TV but a rear projection TV boasting a brand new technology. Fortunately, once replaced, your picture should be as good as the day you bought the TV.While we’ve got a guilty fondness for hulking rear projection TVs, the last thing we expected to find at this year’s IFA was rear projection making a comeback. Unfortunately, once your lamp has begun to show these characteristics there's nothing you can do except replace the lamp. When the lamp nears the end of its life, the picture you see will begin to dim, followed by a distortion of the picture and color skewing. If it doesn't, the lamp is damaged and the picture problem will continue until your lamp burns out.Īnother problem caused by aging of the lamp is a dimming picture. If the lamp's surface hasn't had time to develop a temperature stress point, the hot spot may go away. If you've developed a hot spot you should clean the lamp's surface of all dirt and dust. A hot spot shows on your screen as a spot in the picture that's brighter than the surrounding image. You should keep close watch on how your lamp performs as it nears the end of its rating cycle, as age can have a detrimental effect on the picture quality well before the lamp burns out.Ī lamp that has had dirt deposits on only one area of the light's surface can develop uneven temperatures in this surface, causing what's known as a hot spot. Most lamps are rated for more than 2,000 hours of trouble-free use, with some of the higher-end designs running as long as 8,000 hours before requiring replacement. Much of the quality of your TV picture is due to a well-functioning lamp. The two leading DVD-based calibration discs are Avia and Video Essentials, both available from. While the disc will cost you about $40, it will result in a picture more consistent with content producer's intentions, and may extend the life of your TV by lowering the average light level output of your set. TV calibration is the process of adjusting your set's brightness, contrast, tint, color and sharpness to reference levels that media producers use in the creation of their content. In order to get the absolute best you'll have to do a complete picture calibration, which requires the use of a calibration disc. Adjusting the brightness and contrast of your TV can only do so much for picture quality. Sometimes the quality issues are due to the setup of your TV. ![]() Usually your TV has a test available to correct the convergence on your TV consisting of several lines projected on the screen, which can be moved to place the colors in line with one another and give you a corrected picture. If these tubes become unaligned the picture does not converge in a single space, and you end up with the blurred picture and multiple color aura distortions. A convergence problem develops because the picture projected on the screen originates in a series of CRT tubes, each projecting a portion of the color spectrum. If you experience multiple color lines across the screen of your CRT-based projection TV, or the picture is blurry, you may be experiencing a convergence problem. ![]()
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