First, LED display LED is Light Emitting Diode abbreviation, the Chinese meaning for the light-emitting diode, is a solid-state semiconductor devices, it can directly into the energy of light energy. LED display is an advanced digital information products, it successfully combines the computer technology, network communication technology, image processing technology, embedded control technology, with a flexible display area and resolution (modular can be arbitrarily assembled), high Brightness, low power consumption, long life, low heat, environmental protection and other advantages, the integrated use of sound, light, electricity, maps, text, is all-round, the perfect display of information end products.
The viewing and feel of the LED display is very intuitive, as long as the screen size and pixel spacing and viewing distance appropriate, this direct-view display can get excellent results. LED display in the selection and use of the process to pay attention to the following aspects:
1. The distance between the points is as small as possible. The distance between the center points of the adjacent pixels of the LED display. The smaller the pitch, the more pixels per unit area, the higher the resolution, the closer the shooting distance, and the more expensive the price. At present, the domestic TV studio use of the LED display point spacing of more than 6-8 mm, according to the specific circumstances of the studio, in order to achieve excellent results, the use of the point spacing of 4.25 mm, 4.6 meters high, long 8.2 meters of LED display, the resolution of 1920 × 1080 (that is, the standard HD resolution). To seriously study the signal source resolution and the relationship between the point spacing, and strive to achieve the same resolution, to point to point display, in order to achieve the best results.
2. Filling factor to fill the LED display Fill Factor (Fill Factor), also known as the bright area ratio, that is, the luminous area of each pixel and the pixel occupied by the physical surface area ratio. LED display is arranged by the discrete pixels, there is no obvious between the pixels of the black area. When the distance is viewed, the screen is not coherent and incomplete, and the brightness is uneven. If the light source is confined to a small pixel surface area, the brightness of a single pixel is several times or more than ten times the brightness of the whole screen. Causing a more serious sense of thorny. Flat panel display industry recognized TCO'99 standard requirements, the fill factor should not be less than 50%, the current market, many LED display fill factor does not meet this target. The cut-off characteristics of the TV's low-pass filter also directly affect the appropriate shooting distance of the LED display with different fill factors. The same point spacing of the LED display, fill a small coefficient than the filling factor of the attenuation of more, so the shooting distance needs to increase. If the system low-pass filter passband is 4MHz, high-frequency attenuation characteristics of 12db / octave, then the filling factor of 25% of the shooting distance than the fill factor of 50% more attenuation 1.15db, shooting distance need to increase about 10% The The increase in the fill factor makes the viewing angle of the display more broad, the color mixing effect is more ideal, overcoming the glare of the pixel, but also for the appropriate increase in the brightness of the entire screen to achieve better results to create the conditions. Jiangsu Education Taiwan selection of the fill factor of 60% of the LED display, it has moderate soft brightness, uniform bright colors, clear and delicate expression, to ensure that the display of high quality.