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a href=http://www.everlites.com/led-underwater-lights/ target=_newimg src=http://www.everlites.com/upfiles/wei97mm-84Lm-LED-Underwater-Light97mm-84Lm-LED-Underwater-Light-s-main.jpg border=0 title=underwater led lights //abrdiv style=BACKGROUND: #fbf0fa;span style=FLOAT: right;font-size:10px;Web Design And Seo For www.china-webdesign.com/spandiv style=FONT-SIZE: 16px;a href=http://www.everlites.com/led-underwater-lights/ target=_blankunderwater led lights/a – China Manufacturer/divdiv style=line-hight: 8px; FONT-SIZE: 12px;Thank you for inquiry my underwater led lights, Tel:+86-574-87641051 E-MAIL:sales@everlightings.com/divdiv style=COLOR: #0e774a; FONT-SIZE: 12px;http://www.everlites.com/led-underwater-lights//div/divbrbrpThe a href=http://www.china-lcdmodule.comled display/a primary color processing technology is one of the core technology of the LED a href=http://www.china-lcdmodule.comdisplay/a, choose from the most basic primary color wavelength, to the deployment of the white color temperature, and then carried out to improve color reproduction and color space conversion processing and improve the quality chromaticity uniformity of processing. Today about what this technology and its driving principles.br /A chroma processing technologybr /1, the choice of primary color wavelengthbr /LED display has a very wide range of applications in all walks of life, the primary color wavelength of the LED\\ s in different application spaces have different requirements, some of the choice of the LED primary color wavelength in order to achieve good visual effects, and some are designed to meet the people habits, and some industry standards, national standards or international standards requirements. For example, the primary color wavelength of the green tube full color LED display options; the early days it was generally selected wavelength is 570nm yellow-green LED, although the costs are lower, but display a smaller color gamut, color reproduction is poor and low brightness. Nearly doubled in the choice of a wavelength of 525nm pure green display color gamut to expand the color reproduction of a substantial increase, which greatly improve the display of visual effects. For example, stock quotes display, people are usually accustomed to red rose, fell, while the green $ flat. In the transport sector by the national standards are strict requirements of blue-green band, said passage of the red band of the forbidden line. Thus, the choice of primary color wavelength is an important part of the led display./p
pThe white color coordinate the deployment of/p
pThe white color coordinate the deployment of full-color LED display one of the most basic skills. But in the mid-1990s, due to the lack of industry standards and testing methods, usually only rely on the human eye, the seat of your pants to determine the white color coordinates, resulting in serious color cast and the randomness of the white color temperature. With the promulgation of industry standards and testing means complete, many manufacturers began to standardize the process of full-color screen color. But there are still some of the manufacturers due to the lack of color theory guidance, often to the expense of some of the primary colors of the gray scale deployment of 100 field color coordinates, the overall performance is not improved./p
p3, chroma uniformity of treatment./p
pled display chroma uniformity has long been a major problem plaguing the industry is generally believed that the uneven brightness of the LED can be a single point of correction, to improve the brightness uniformity. Uneven chroma can not be corrected, only to improve the segmentation and filtering by the LED color coordinates. With the increasingly high demand led display, LED color coordinates segmentation and filtering have been unable to meet the people\\ s critical eye, comprehensive correction of the display screen, improved color uniformity can be achieved the. We found that even the first brand in the international same file LED wavelength deviation and the deviation of color saturation, and the deviation range greatly exceeds the threshold of the human eye on the green color to identify chroma uniformity correction is, therefore, significance. CIE1931 chromaticity diagram according to the law of the center of gravity, we find: G file within any (amp;Square; abcd) a little green mixed a certain percentage of the red and blue, the color coordinates of the mixed color adjustment to the straight line cR and straight-line dB crossover point O./p
pAlthough you can greatly improve the color uniformity. However, after correction of color saturation decreased significantly. Another premise is the same time, the use of red and blue to green chroma uniformity correction of the same pixel, red, green and blue LED as possible concentrated makes the RGB color mixing distance as nearly as possible in order to achieve better effect. The industry typically uses a LED method will be evenly distributed chroma uniformity correction to bring chaos. In addition, tens of thousands of red, green and blue LED color coordinates measurement is how to expand is an extremely difficult problem. We give tips./p
p4, the color reduction treatment/p
pThe birth of pure blue, pure green LED full color LED display its wide color gamut, high brightness, sought after by industry. However, due to the chromaticity coordinates of red, green and blue LED with the PAL TV RGB color coordinate a large deviation (Table 1), Full Color LED Display color reduction degree of poor. Especially in the performance of people of color when visually more obvious deviation. As a result, the color reproduction processing technology came into being. Color reproduction of this I recommend two ways to deal with:/p
pFirst: red, green and blue color LED color coordinate space transform, trichromatic color coordinates between the LED and PAL TV as close as possible, thus greatly improving the color reproduction of led display. However, this method greatly reduces the color gamut of the LED display screen color saturation dropped significantly./p
pSecond: only to the human eye is most sensitive, color, color gamut, make the appropriate correction; on the other the human eye is not sensitive enough color gamut as little as possible to reduce the original color saturation. Treated as such, can strike a balance between the degree of color reproduction and color saturation./p
p5,3 +2 multi-primary color chromaticity approach/p
pSpring recovery of all things, embraced in a blue sky, green grass; rolling autumn Shakes the Barley;, a golden under the sun shines. The colorful nature is so beautiful, unfortunately, led display not exact representation of this beautiful scenery. LED Although they are monochromatic, but the colored LED is still half-wave of about 30 ~ 50nm wide, so the color saturation is limited. As can be seen from Figure 3: extremely rich in Nature color $ and Full Color LED Display of the blue region of the color saturation is a serious shortage./p
pSecond, the primary colors-driven principle/p
pToday\\ s video source RGB color, no yellow, green color. Then, the display terminal yellow, green base color how to drive? In fact, in determining the drive strength of the two primary colors of yellow, green; due to follow the following three principles:/p
p(1) increase in yellow, green two primary colors in order to expand the color gamut, thereby enhancing the color saturation. And the overall brightness value can not be changed;/p
p(2) to improve color saturation, shall not change the tone;/p
p(3) D65; the RYGCB gamut boundary endpoint, linear expansion in the color gamut.br //p