Blind Hole Dispensing Guidance for Smartphone Screens

I. Project Background

In the smartphone screen manufacturing process, blind hole dispensing is a highly challenging step. These holes are typically made of glass, and the mirror like reflection of the surface can cause attenuation of the reflected laser signal. Traditional laser displacement sensors often struggle to accurately measure the position and depth of these holes. Highly reflective surfaces can also interfere with sensor signals, leading to unstable data that affects the precision and reliability of the dispensing process.

SinceVision laser displacement sensors feature high compatibility. They adapt to smartphone screens made of various materials and colors, including transparent, semi transparent, and reflective materials. This ensures measurement accuracy and stability under varying industrial conditions.

II. Blind Hole Dispensing Height Guidance Solution for Smartphones

The SinceVision SG Series includes 15 product models. Among these, the SG5022 features a high repeatability of 0.02 μm and a sampling frequency of 590 kHz. This enables real time height feedback to ensure accurate dispensing positions. SinceVision SG Series sensors utilize anti reflection technology to effectively reduce interference from mirror reflections, ensuring measurement stability on glass surfaces.

During production, the sensor is installed at a specular angle on the measurement platform to detect the height at the center of the blind hole. It provides real time feedback on key parameters such as position and depth. With these precise data inputs, the dispensing system can accurately control both the glue volume and position. This solves the problem of inaccurate control found in traditional processes and improves dispensing consistency.

Schematic Diagram of Blind Hole Dispensing Height Guidance

Efficiency is critical in large scale smartphone screen production. SinceVision SG Series sensors support multiple communication modes such as RS232 and analog output, allowing easy integration into automated production lines. They complete blind hole measurement and data transmission quickly, providing real time support for dispensing equipment. This high speed capability meets the demand for efficient production and reduces cycle times.

The application of SinceVision SG Series laser displacement sensors in smartphone screen blind hole dispensing improves precision and efficiency. Automated integration and high precision measurement reduce defect rates and enhance overall product quality. This technology provides a reliable measurement solution for the smartphone manufacturing industry.