Technology of color restoration and color space transformation.
The color space transformation is based on the deviation between the full-screen LED color coordinates and the signal source color coordinates. The standard chromaticity diagram is as follows, in which the standard chromaticity coordinate of the phosphor screen phosphor is the standard of the European Broadcasting Union (EBU), and the chromaticity of the standard light source D65 is x-ray 0.313-y-0.329. From the chromaticity diagram below, we can see that the color space triangle of the video source is different from that of the LED LED. Fortunately, the color space of the LED is larger than and contains the color space of the video source, but the problem is that if the red, green and blue coordinate signals of the video source are not properly adjusted (color coordinate space transformation) the color reflected on the LED display screen is not the true correspondence of the video source color, it is possible to emit pink or produce other color deviation phenomena when the white light is supposed to be emitted. In order to solve the above problems, it is necessary to transform the color coordinates of the video source and the LED display system, and every point in the video source color space corresponds to every 1.11 in the LED color space, so as to make the picture color closer to the truth.
R 3.0651-1.3942-0.4761 X.
G-0.9690 1.8755 0.0415 Y.
B (EBU) 0.0679-0.2290 1.0698 Z.
The above formula is to change the standard primary color system to the coordinates of the RGB space.
In our display screen design practice, we often encounter such a question: does the color displayed on our display screen truly reproduce the color of the actual scene? This means that the reproduced color can be called a wonderful color reproduction only when there is no difference between the original color and the original color. If the color consistency can not be achieved, then it is important to be able to measure the difference between the original color and the reproduced color.
We have been thinking about this when we are improving the quality of the display. So we need to find a color difference, which should be "consistent with the feeling". That is to say, it should represent the color difference by such a value that when the value is small, the color difference felt visually is small.
The problem of solving the color difference is to find a spatial representation of the color quantity, where the distance between the two spatial points also reflects a measure of the sensory difference between the color quantity.
For example, the above picture contains the standard chromaticity diagram of Mcadam ellipse: in this chromaticity diagram, the chromaticity in an ellipse is indistinguishable from the human feeling, that is, the same. Through the color space transformation, the color restoration of our company's products is more real.
In practice, the change of eye sensitivity must be taken into account due to the influence of specific adaptation conditions. The relationship between luminous density difference and luminance difference is as follows: Wend25Y A 1PUX 3-17. Through the non-linear transformation of luminance, our products are in line with the luminance characteristics of human visual perception.
Top shine Electronics was founded on June 10, 2008, is a professional LED display screen sign product research and development, production, sales, installation and service as one of the high-tech enterprises.Also specialize in bus led destination screen sign、Next-current stop led sign、Bus station led display system、Variable Message led display Sign - VMS、Passageway Exit/Entrance led sign、Toll gate-Tunnel-Lane control LED screen sign、Arrival-Departure LED display sign、
bus-metro-railway sattion infromation led display、Parking guidance led sign system、Gas station price led sign、Creative & Customization LED display screen signs、Pharmacy led cross display sign、Transparent/Flexible/dip/smd/outdoor/indoor/fixed/rental LED display screen signs.
It has 4000 square meters of modern LED display standard factory, supporting cross LED screen and bus screen automatic assembly line, as well as more than 20 sets of domestic and foreign advanced equipment such as SMT mounter, DIP plug-in LED module reflow soldering, full-color LED display light gun instrument, vibration tester and so on. At present, our company has more than 200 technical and production personnel, LED display monthly stable production capacity of more than 2000 square meters. Cross and car bus screen products are exported to major cities at home and abroad. And there are more than 30 directly affiliated sales and service organizations throughout the country, and authorized service organizations have been set up in Hong Kong, the United States, Europe, South Korea and other countries and regions.
Since its inception, Top shine Electronics has built more than 3000 projects across the country and installed thousands of LED displays. Our company enjoys a high market reputation for its high-quality module unit products, leading technical level and first-class after-sales service. in subway, station, railway transportation, urban rail transit, road transportation, civil aviation transportation, stadiums, radio and television, public media, trading market, As well as all kinds of business organizations and government agencies and other market segments have a large number of guide sign screen, subway screen, station screen and cross screen bus line screen customers.
