LED industry is a " light manufacturing" industry, due to the high brightness of the LED display, it has become one of the "manufacturers" of light pollution. At present there is no standards to restrain the brigntness, many outdoor LED displays will be lit up when night falls. At the same time, these LED display will cause a certain level light pollution to the surrounding environment, and cause invisible harm to the surrounding residents. For LED display manufacturers, how to solve the "light pollution"? Let's take a look.
First, Automatically Brightness Adjustment System.
We know that the ambient brightness changes greatly at different times and places. If the LED display's brightness is 60 percent greater than the ambient brightness, our eyes will obviously feel unadaptable, which means have caused light pollution to people. The outdoor brightness acquisition system collects the environment brightness at any time, then the display screen control system receives the system data and automatically converts the broadcast brightness suitable for the environment through software.
Second, multi-level gray correction technology.
The 8-bit gray scale used by the ordinary display system will harden the colors in places with low gray levels and color transitions. The new LED screen control system uses a 14-bit gray scale, to make the color transition smoother ,to make people feel comfortable while watching the display.
Third, the reasonable installation location and display size.
There is an empirical plan for viewing distance and viewing angle and display size. At the same time, image research has specific design requirements for viewing distance and viewing angle of the display screen. In the design of the display screen, it should meet the design requirements as far as possible, and plan rationally.
Fourth, the selection and design of broadcast content.
LED display screen is the public media, including public service, advertising, and instruction,etc. When we choose the content, we must agree with the public requirements so that people would like to watch the display.This is also an important aspect of preventing and controlling light pollution.
LED diode itself is a green light source. Although a certain degree of color light pollution is caused by clustered LED large display screen, this contradiction is inevitable and cannot be completely eradicated. Only use technical methods and policies to minimize the color light pollution, and coordinate advertisers’ needs and the public's viewing psychology. At the same time, we also see that compared with today's neon and white light box advertising, the light pollution of LED display has been greatly reduced. Besides LED display also can be energy saving and rich colors, it will surely replace neon outdoor lighting and information display.