LED display board is a display screen made by controlling the display mode of semiconductor light-emitting diodes.
It is composed of tens of thousands to hundreds of thousands of semiconductor light-emitting diode pixels arranged evenly, and uses the light and color changes of these pixels to display text, graphics, images, animations, videos and other information.
Working principle of LED display board
The working principle of LED display board is mainly based on the electroluminescent characteristics of light-emitting diodes (LEDs). The following is its detailed working principle:
1. Basic structure of LED:
- LED is a diode made of semiconductor materials. Its core part is composed of a wafer composed of p-type semiconductors and n-type semiconductors, with a transition layer in the middle called p-n junction. When a forward current passes through, the electrons in the p-n junction recombine with holes, release energy and emit it in the form of light.
2. Composition of pixels:
- Each LED on the LED display board represents a pixel, which can be monochrome (such as red, green, blue) or full color (a combination of red, green and blue). The full-color LED display mixes rich colors by controlling the brightness and color of the red, green and blue LEDs in each pixel.
3. Control system:
- The control system of the display receives signals from external devices (such as computers, video players, etc.) and converts these signals into instructions to control each LED pixel. These instructions include the on and off state of the LED, brightness level and color information, etc.
4. Display process:
- When specific content is to be displayed, the control system sends instructions to the corresponding LED pixels according to the input signal. The LED pixels change their on and off state and color according to the instructions, thus forming the required image or text as a whole.
5. Technical features:
- High brightness and clarity: The use of high-brightness LEDs and advanced driving technology ensures that the display can be clearly seen even in strong outdoor light.
- Rich colors: Through the combination of red, green and blue LEDs, up to 16 million colors can be displayed to meet various visual needs.
- Dynamic display: Supports the playback of dynamic content such as videos and animations, making the display effect more vivid and attractive.
- Energy saving and environmental protection: LEDs have the characteristics of low power consumption and long life, which helps to reduce operating costs and reduce environmental impact.
6. Working mode:
- Static display: Each LED pixel always keeps the on and off state unchanged, which is suitable for the display of static content such as text and simple graphics.
- Dynamic display: Dynamic images or text are formed by continuously switching the on and off state of LED pixels, which is suitable for the display of complex content such as videos and animations. In order to achieve a smoother display effect, PWM (pulse width modulation) technology is usually used to control the brightness change of LED.
In summary, LED display panels display various information by controlling the on and off and color changes of a large number of LED pixels. It has the characteristics of high brightness, high definition, rich colors, dynamic display, etc., and has been widely used in advertising, performances, meetings and other occasions.