At present, the LCD splicing screen is the most popular display in the large-screen market. It has the advantages of high definition, high brightness, high contrast and high image quality, which is unmatched by other displays. The performance is stable, and the service life is up to 100,000 hours. 7 * 24 hours of uninterrupted work can be used for projects with extremely high display requirements. As a high-tech electronic product, LCD splicing screen aging test is a very important part of product quality control. After aging, the product can improve its performance and contribute to the stable performance of subsequent use. The aging test of the LCD splicing screen is based on the product's failure rate curve, that is, the characteristics of the bathtub curve, thereby improving the reliability of the product.
The aging of the splicing screen is divided into white light aging (4 hours) and video aging (48 hours).
Constant current source means that the current is always constant. If there is a frequency problem, it is not a constant current. That is AC or pulsating current. The AC or pulsating current source can be designed to have a constant rms value, but the power supply cannot be called a "constant current source". Constant current aging is the most suitable splicing screen aging method. Overcurrent impact aging is also a new aging method adopted by manufacturers. Using a constant current source with adjustable frequency and adjustable current, the aging of the LCD splicing screen can be judged in a short time, and the quality life of the LCD splicing screen can be found. Many traditional aging cannot single out the hidden LCD splicing screen.
Then the LCD splicing screen aging test notes:
1. Test content: white screen, red, green, blue monochrome, gray gradient, video effect, text effect.
2. The LCD splicing screen aging test must be a person on duty, and if any problems are found, they should be reported and dealt with in time.
3. The white screen test time of LCD splicing screen is not less than 24 hours.
4. Monochrome, grayscale gradient test is not less than 24 hours.
5. Video and text effect test shall not be less than 24 hours.
