Exhibition hall indoor LED full-color display project

Is located in the center of Shanghai Shanghai city planning exhibition hall, towering magnificent, unique style, aesthetic, is the symbol of Shanghai's famous buildings and important tourist attractions. Into the exhibition hall, the face of a huge color display screen immediately greeted. This is the international advanced level of new LED full-color display by the Shanghai science and technology development limited company system carefully before, has the entire screen so far the highest resolution indoor full color of the said crown, the number of independent intellectual property rights of unique patented technology, the main defects effectively overcome the LED display screen, the display of high quality give people a new visual enjoyment. She and the elegant environment of each other, and it was beautiful.

A seemingly ordinary classical LED full-color display, where? Let's start with the ratio of the bright area of the LED display

As a high-end product of the application of LED, indoor full color LED video display screen has been widely used in large public places. Its display quality and product performance are improved, but not perfect. The black area of LED pixels is an important factor that affects the quality of picture.

As we all know, because the LED display is made up of discrete pixels, there is no obvious black area between pixels. When watching closely, the picture was pockmarked grainy, neither coherence is not complete, the brightness is not uniform, the effect is not ideal; at the same time because light confined in a small area within a single pixel, the pixel brightness is the entire screen brightness is several times or even more than and 10 times, resulting in a single pixel harsh feeling. For example, spacing 8mm, diameter of 2.4mm SMT surface mount three in one pixel, when the entire screen brightness 1000cd/m2, the brightness of each pixel in the 14000cd/m2 above, is 14 times the entire screen brightness, the brightness even in the outdoor is dazzling, indoors more dazzling.

The influence of the LED pixel black area can be quantified by the ratio of the area of the pixel and the area occupied by the pixel. Bright area ratio (Fi IIFactor, also known as fill factor, fill factor) concept is derived from other display technology, and cited in the field of LED display for the first time. At present, the display industry recognized as one of the most popular certification, and has been widely recognized in the global TCO certification has the display industry including flat panel display pixel resolution field or light area ratio as an important indicator to measure the quality of display. In the TCO '99 standard clearly stipulates that the brightness ratio shall not be less than 0.5. Currently on the market a variety of common LED display and there is a big gap. Still above the dot spacing 8mm, Phi 2.4mm of the SMT table affixed to three pixels as an example, its bright area ratio is only 0.07, it is clear that the bright area ratio is too small to affect the display quality of LED display a big crux.

In addition to the impact of the LED pixel black area on the display quality, LED display there is a common defect, that is, the phenomenon of the hard to go to the mosaic mosaic LED phenomenon of the display screen for a long time. LED chip formation inconsistency luminescence is influenced by many factors in the production process, made after the display will not have a uniform display area between the color and brightness, so that the screen mottle sense, like mosaic wall stickers. The manufacturer has taken various measures to make the adjustment, reduce and improve, but it has been difficult to eradicate, the reason there are three: one is in the same grade LED brightness display module, red, green and blue colour brightness is both consistent; two are at different levels using a variety of adjustment the correction measures, but also error accumulation, the accumulation of the mosaic phenomenon appeared; three is a large display of hundreds of thousands or even hundreds of thousands of pixels, to keep the red, green and blue colour consistency of light, to the current input method of screening workload and costs are considerable, even to make such a huge effort, we can only get an evaluation the visual effect is less effective, manufacturers not only to bear, and that has not only muddle along.

In the face of the particle LED display in the visual sense, sense of harsh left people and mottled feeling, we can make a difference? The answer is yes. The indoor full-color display Shanghai city planning exhibition hall was satisfied with the answer, this is the proportion C-0401 highlight indoor full color LED video display since the bright area ratio is an important index to measure the quality of the display, and LED display bright area ratio is generally low, so improve the bright area proportion is imperative. In Shanghai City Planning Exhibition C-0401 LED color video display screen installed in the Museum (hereinafter referred to as C-0401) is currently the highest proportion of bright LED display, the bright area ratio reached 0.62, for the first time exceeded the required TCO '99 standard 0.5. The advent of C-0401 display is of great symbolic significance. It not only reveals the influence of the ratio of the bright area on the display quality of the LED screen for the first time, but also points out a new way to improve the brightness ratio. Compared with other display technology to increase the resolution to improve the brightness of the proportion of different practices, LED display due to the production cost constraints, the resolution can not be too high. Under the condition of keeping the same resolution, increasing the area of each pixel is the only way to improve the brightness ratio. C-0401 display according to the pixel structure of the display screen by a bold innovation, the successful implementation of the bright area proportion increased greatly. After calculation, compared with the conventional display screen with the same distance, the minimum sight distance of the C-0401 display is reduced from 11.8 meters to 3.25 meters