On March 1, the world's most advanced folding screen mobile phone - Huawei vertical folding screen pocket2 was released, which is the 43rd mass-produced folding screen mobile phone in the world since the first folding screen mobile phone came out in 2018.
Professional research institutions IDC, CINNO Research have released folding screen mobile phone industry statistics, although the data of the two institutions are slightly different, but from the overall situation, last year's folding screen mobile phone shipments in the Chinese market were about 7 million, with a growth rate of more than 100%.
Consumers' acceptance of folding screen mobile phones continues to increase, and at the same time, more advanced requirements are also put forward for the lightweight, durability, folding feel, and screen flatness (crease reduction). Among them, screen flatness (crease reduction) is the most concerned issue.
First, the application of measurement.
In addition to the hinge design, the screen structure is also related, and the measurement sample comes from the flexible panel connection structure.
A specific area of the sample needs to be coated with a special material in a specific arrangement, and due to the specificity of the material, spectral confocal technology is required to achieve the measurement. Considering the factors such as range, accuracy, and efficiency, we will select the HPS-LCX3000 3D line spectral confocal sensor based on spectral confocal technology for measurement.
Detect the physical object. 
Testing requirements. Product Name: Folding screen connection structure.
Measurement items: visual inspection.
Measurement requirements: clearance, height, segment difference, warpage.
Detection process. The 3D line spectral confocal sensor HPS-LCX3000 was used to scan the sample.
The 3D line spectral confocal sensor HPS-LCX3000 is a non-contact optical detection sensor based on the principle of spectral confocal with a Z-axis repeatability of 04 m, resolution 4 in the x-direction9 m, a single scan can record detailed raw data and generate various forms of 2D 3D maps, which can complete high-precision 3D measurement of almost all material surfaces such as transparent, mirror, and highly reflective.
Test results. 
This information can be obtained by precise measurements of the sample using the HPS-LCX3000 3D line spectral confocal sensor from Hypersen.
Second, product introduction.
Hypersen HPS-LCX series is a non-contact optical precision measurement sensor based on the principle of spectral confocal method, which has the characteristics of fast detection speed, high imaging resolution and strong material adaptability.
Product Advantages: The product uses line-scan CMOS imaging to realize the 3D feature analysis of the appearance of the measured object, which breaks through the limitations of traditional detection methods in technology, and the measurement process is not affected by the intensity of reflected light.
Industry applications. It effectively solves the problem of high-precision appearance inspection of transparent body, highly reflective mirror, black rubber and other materials in the industry, and is suitable for first-class testing applications in the fields of 3C electronics, semiconductors, automotive electronics, medical treatment and scientific research.