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Evolution history of display methods

Evolution history of display methods


Traditional incandescent lamps can't overcome the defects of large power consumption and short life. Neon lights, advertising light boxes, and flat signboards are colorful, but the changes are monotonous and can't play video images. The magnetic flips can be assembled by computer. Simple pattern, but it does not have a light source itself, and the effect at night is poor. In recent years, with the rapid development of microelectronics technology, automation technology and computer technology, the semiconductor manufacturing process has become more and more mature, resulting in smaller and smaller LED display points, higher resolution, and the three primary colors of display light. (Red, Green, Blue) is restored to a full-color effect, making the application range of light-emitting diodes (LEDs) as display devices increasingly wide. From the perspective of future development trends, the performance advantages of several media with video effects are different: cathode tube (CRT) or quartz tube (DV) large TV is very expensive, and usually only can be 37 inches, and the volume is large. To be restricted. It works well when you don't need a large screen and use it indoors. Color liquid crystal display (LCD) is also expensive, complicated, and the area is not too large. It is greatly affected by the viewing angle, and the viewing angle is small, but the picture is fine and the view is good. The image projection device (Projector) has low brightness and poor definition (the picture is unevenly received by the light). But the advantage is that it is easy to install and easy to maintain. TV wall (TV-Wall), with a dividing line on the surface, visually foreign body.

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