Shenzhen Enrich Electronics Co.,Ltd

As the realization of new technology terminals, LED light pole screens and LED advertising players have a wide range of needs in smart cities. Product quality is even more important. There must be no shoddy phenomenon. Therefore, Tailong Zhixian will continue Let me explain the important indicators for testing the quality of LED light pole screens and LED advertising players.

Index 1: Failure rate

The LED light pole screen and LED advertising machine are composed of three basic tones of red, green and blue. The failure of any one will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate caused by the LED device itself should not be higher than three ten thousandths from the start of assembly of the smart LED display integrated machine to 72 hours before shipment.

Index 2: Antistatic ability

LED is a semiconductor device, which is sensitive to static electricity and can easily cause static failure. Therefore, the antistatic ability is very important to the life of the display screen. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED should not be lower than 2000Vwww＊tlzx-ledcom.

Indicator 3: Consistency

The consistency of the brightness and wavelength of each color LED of LED light pole screen and LED advertising machine red, green and blue determines the brightness consistency, white balance consistency and chromaticity consistency of the entire display screen. Generally speaking, display screen manufacturers require device suppliers to provide LEDs with a wavelength range of 5nm and a brightness range of 1:1.3. These indicators can be achieved by the device supplier through the grading of the color separation machine. Voltage consistency is generally not required.

Index 4: Brightness

LED brightness is an important determinant of display brightness. The higher the brightness of the LED, the greater the margin for the use of current, which is good for saving power and keeping the LED stable. LEDs have different angle values. When the brightness of the chip is fixed, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display. Generally, a 100-degree LED should be selected to ensure sufficient viewing angle of the display screen. For displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle and price.

Index 5: Attenuation characteristics

The red, green, and blue LEDs all have the characteristics of brightness attenuation as the working time increases. The quality of LED chips, the quality of auxiliary materials and the level of packaging technology determine the attenuation speed of the LED. Generally speaking, after 1000 hours, 20 mA normal temperature lighting test, the attenuation of red LED should be less than 10%, and the attenuation of blue and green LED should be less than 15%; the consistency of red, green, and blue attenuation should be less than , The white balance of the LED advertising machine will have a great impact in the future, which will affect the fidelity of the display.