Release date: 2017-11-20 Source: Foreign station sharing: First, LED display Label: Analysis of the difference between LED display and splicing screen Lithium Battery,Lithium Batteries,Lithium Polymer Battery,Lithium Iron Phosphate Battery Power X (Qingdao) Energy Technology Co., Ltd. , https://www.solarpowerxx.com Analysis of the difference between LED display and splicing screen
LED is the abbreviation of Light Emitting Diode. Chinese means LED, which is a solid-state semiconductor device that can directly convert electrical energy into light energy.
LED display is an advanced digital information product, which successfully combines computer technology, network communication technology, image processing technology, embedded control technology, etc., with flexible display area and resolution modularity can be assembled at will), high brightness It has the advantages of low power consumption, long life, low heat, environmental protection and durability. It is a terminal product that displays information in an all-round way and comprehensively using sound, light, electricity, graphics and text.
The viewing effect and feel of the LED display screen is very intuitive. As long as the screen size and pixel pitch and viewing distance are appropriate, this direct view display can achieve excellent results.
Pay attention to the following aspects in the selection and use of LED display:
1. The spacing should be as small as possible
The dot pitch is the distance between the center points of adjacent pixels of the LED display. The smaller the dot pitch, the more pixels per unit area, the higher the resolution, the closer the shooting distance can be, and of course the more expensive it is. At present, the dot spacing of LED displays used in domestic TV studios is mostly 6-8 mm.
According to the specific conditions of the studio, Jiangsu Education Station used an LED display with a dot spacing of 4.25 mm, a height of 4.6 m and a length of 8.2 m with a resolution of 1920×1080 (ie standard HD resolution). ). It is necessary to carefully study the relationship between the resolution of the signal source and the dot pitch, and strive to achieve consistent resolution and point-to-point display to achieve the best results.
2. The fill factor should be high
The fill factor of the LED display (FillFactor) is also called the bright area ratio, that is, the ratio of the light-emitting area of ​​each pixel to the physical surface area occupied by the pixel. The LED display is arranged by discrete pixels, and there are obvious black areas that are not illuminated between the pixels. When viewed at close range, the picture is incoherent and incomplete, and uneven brightness produces graininess. If the light source is confined to a small pixel surface area, so that the brightness of a single pixel is several times or even more than ten times the brightness of the whole screen, Causes a more serious glare. The flat panel display industry recognized TCO'99 standard stipulates that the fill factor should not be lower than 50%. At present, the filling factor of many LED displays on the market does not reach this target. The cut-off characteristics of the low-pass filter of the TV also directly affect the appropriate shooting distance of the LED display with different fill coefficients. LED display screens with the same dot pitch have a smaller fill factor than the fill factor, so the shooting distance needs to be increased. If the low-pass filter passband of the system is 4MHz and the high-frequency attenuation characteristic is 12db/octave, then the shooting distance of 25% of the fill factor is 1.15db more than the fill factor of 50%, and the shooting distance needs to increase by about 10%. . The increase of the fill factor makes the display angle of the display wider, the color mixing effect is more ideal, overcomes the glare problem of the pixel, and creates conditions for appropriately improving the brightness of the whole screen to obtain better effects. The Jiangsu Education Desk chose an LED display with a 60% fill factor. It has moderately soft brightness, evenly bright colors, clear and delicate expressiveness, and guarantees the high quality of the display.