Application Case | Height Guidance for Blind Hole Dispensing on Smartphone Screens with SinceVision SG Series Laser Displacement Sensor

1. Project Background 

In the manufacturing process of smartphone screens, blind hole dispensing is a particularly challenging step. Smartphone screen blind holes are usually made of glass. The glass's mirror-like reflection causes laser reflection attenuation. This makes it difficult for traditional laser displacement sensors to accurately measure the position and depth of blind holes. Also, the reflective surface can disrupt sensor signals. This leads to unstable measurements, affecting the accuracy and reliability of dispensing.

Image: Schematic of Blind Hole Dispensing Guidance on Smartphone Screens

SinceVision laser sensors are highly compatible. They can adapt to various screen materials and colors. This includes transparent, translucent, and reflective surfaces. This ensures measurement accuracy and stability under different conditions.

2. Height Guidance Solution for Blind Hole Dispensing

The SinceVision SG Series Laser Displacement Sensor offers 15 different models. The SG5022 among them has a repeatability of 0.02μm and a 590kHz sampling rate. It provides real-time height feedback to ensure dispensing accuracy. The SG Series uses anti-reflection tech. It minimizes interference from mirror reflections. This ensures precise, stable measurements on glass surfaces.

Image: Schematic of Blind Hole Dispensing Height Guidance

The SinceVision SG Series Laser Displacement Sensor is mounted at an optimal angle on the measurement platform during production. It will detect the height of the blind hole's center. It provides real-time feedback on key parameters. These are the position and depth of the blind holes. This ensures precise dispensing. With these accurate measurements, the system can control the adhesive. It can precisely manage its volume and position. This solves the issues of inaccurate adhesive volume and placement in traditional processes. This dramatically enhances dispensing accuracy and consistency.

Image: Schematic of Blind Hole Dispensing Height Guidance

In the mass production of smartphone screens, efficiency is just as critical. The SinceVision SG Series Laser Displacement Sensor supports RS232 and analog signals. It has multiple communication modes. This allows seamless integration into existing automated production lines. The sensor measures and transmits data quickly. It supports dispensing equipment with real-time data. Its high-speed measurements meet the demands of fast production lines. They improve efficiency and shorten manufacturing cycles.

3. Recommended SinceVision Sensors

Using the SinceVision SG Series Laser Displacement Sensor in blind hole dispensing for smartphone screens improves precision and efficiency. It also cuts defects by automating the process and using high-accuracy measurements. This enhances the overall product quality. This solution is reliable for measuring blind hole dispensing on smartphone screens. It strongly promotes high-quality development in the smartphone manufacturing industry.