LCD screens are also called liquid crystal displays. The main screen materials can be divided into TFT screens, IPS screens, and NOVA screens. TFT screens work in a combination of back-transmission and reflection. Each pixel on the back of the liquid crystal has a semiconductor switch that can be directly controlled by a dot pulse. This design method can accurately control the display grayscale of the screen and improve the screen response speed. In terms of color display, TFT screens have the best effect, high contrast, and fast response. They are the most commonly used material in LCD screens. As the pitch of mobile phone screens is getting smaller and smaller, the performance and life of pogo pin probe modules in small pitches are very poor. There are often adverse phenomena such as stuck pins and broken pins, which will also slow down the production progress. Therefore, they are generally not selected. High-current shrapnel microneedle modules have outstanding performance in small pitches. Their thin and light body can adapt to a pitch value range of 0.15mm-0.3mm, and the connection is very stable. Combined with the customizability and shorter delivery cycle of the high-current shrapnel microneedle module, the problem of mobile phone screen testing has been further solved, allowing the production and testing of mobile phone screens to proceed in an orderly manner.