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Digital lights compared with LED screens and projectors

Digital lights and other video display equipment differences and stage applications

Understand digital lights
Digital lights, is a comprehensive multimedia server, computer light function, high brightness projector, LED dyeing module or infrared camera module and other high-tech stage lighting equipment; Is a set of video, optics, machinery, electronics and other disciplines as one of the comprehensive products; It is a new creative tool for stage art creation.

• 1. The digital technologies widely used in digital lights are mainly：

  （1）Digital video technology: can support a variety of video formats of 3D and 2D video files, such as mov/avi/mpg2/jpg/bmp/png;
  （2）Digital corners: can be cut in a variety of ways like cutting computer lights, and there are a variety of built-in professional cover editing software for real-time editing of images;
  （3）Digital light gate: like a computer light with a mechanical light gate, you can turn off the brightness when the brightness is not required, but also simulate the light gate effect for soft processing of the image (electronic light gate and stroboscopic);
  （4）Digital layer: Each desk lamp has more than 3 image layers that can be operated separately, and there can be more than 3 video display Windows in the display area, which can play and edit different video images respectively;
  （5） Digital trapezoidal correction: The digital lamp can perform full-angle trapezoidal correction on all four sides of the image in the X axis and Y axis direction, which is completely different from the trapezoidal correction function of the projector itself;；
  （6）Digital color adjustment: all video images or pictures can be CMY color adjustment and various color effects processing to meet the color requirements of various artistic performances;
  （7）Digital LED color palette: built-in LED dyeing module, these LED modules can be linear RGBW color mixing effect processing to meet different color needs;
  （8）Digital stroboscopic: The device has a mechanical stroboscopic function like a computer lamp, and the projected image also has an electronic stroboscopic effect function of 0Hz~10Hz;
  （9）Digital image management: the device centrally manages all images, and is divided into internal images and external input images in two ways, which can easily upload various images on the network and manage and call files like managing computer documents;
  

• 2.The difference between digital lights and LED display large screens

  （1）he difference in display principle: digital lights use mature projector technology, which belongs to passive display; The LED large screen uses the unidirectional conductivity of the diode to emit light, which is an active luminous display.
  （2）The difference in the display area: the distance of the digital lamp can be adjusted according to the brightness requirements to meet the needs of the display area in various occasions, and the LED large screen is the use of LED modular assembly to achieve the needs of the display area.
  （3）The difference between the clear picture on the ground: each digital lamp can display a resolution of 1024×768 or more, which is very clear, uniform display, and not dazzling; The pixel pitch of the LED large screen has different specifications such as 4mm, 7mm, 8mm, 16mm, 20mm, etc. The smaller the pitch, the clearer it is, but the higher the cost.
  （4）The difference in brightness control: digital lights can be superimposed as needed to increase the display brightness, flexibly increase or reduce the brightness in different performance environments, and fully meet the viewing requirements; The LED large screen because it belongs to the self-generated light source body, the brightness is high, long-term viewing will lead to eye fatigue.
  （5）The difference in the use of flexibility: the digital light can adjust the projection orientation according to the requirements of the program or the plot, and can carry out real-time trapezoidal correction of the image, multiple splicing, three-dimensional effect programming and other processing; In addition to the projection function, it also has all the functions of conventional computer lights. LED large screen is generally fixed in one place, more suitable for remote viewing, clarity requirements are not high places, and can only display pre-compiled video files through the playback device.
  （6）The difference in control: the function of digital lights is realized by the lighting operator to operate the lighting console to control the video image, just like using computer lamps, which is very convenient; LED large screen consists of a matrix of multiple modules, power lines and control lines, the operation is more complex.
  （7）The difference between input and output interfaces: digital lamps have VGA S-VIDEO RGBHV gigabit network port DMX input and output interfaces; The LED large screen generally only has VGA or a single signal input interface.
  （8）The difference in structural composition: digital lights are a comprehensive equipment, including video, optical, mechanical, electronic and other disciplines; The LED screen is just an optical display device.

• 3.The difference between digital lights and traditional high-brightness projectors

  （1） The digital light is controlled by the lighting console, and the programming is very simple to use; The projector in the digital lamp system is only equivalent to play a display imaging role (the function of the lamp) ；
  （2）the digital lamp can use the ladder correction function of the server to process the projected image, so that it meets the requirements of various backgrounds and props; The projector can only passively display images.
  （3）The digital light server has more than 1000 exquisite video lighting materials built in, and can upload new video images in real time for real-time editing and playback; The projector can only display passively.
  （4） Digital light built-in a variety of professional video programming software, you can use multiple desk lamps for 2×1 4×1 and other splicing combination, you can also use multiple lamps superimposed to increase the display brightness, so as to replace the traditional theater canopy with a digital canopy, and the size of the digital canopy is not limited.
  （5）Digital lights can be connected together with network cables and network switches, and it is convenient to use material management software to centrally manage file materials.
  （6）The digital light can process the video signal transmitted in real time by the external camera or other playback equipment and project it to achieve the effect of real-time acquisition and editing of images.
  （7）The digital light has no strict requirements for the position of the hanging, and can be suspended according to the site conditions, without occupying a large space, and can also be hidden and installed to increase the beauty; Projectors generally can only be front-facing or rear-facing, and have special requirements for the installation position and installation Angle.
  （8）Digital lights by the lighting division to operate the lighting console to control the application of the function, is to use a complex lighting system; The projector can only play back video images that were created earlier by the video crew.