Industry Application丨Folding screen connection structure detection based on chromatic confocal technology

On March 1, the world's latest folding screen mobile phone - Huawei's vertical folding screen Pocket 2 was launched. This is the world's 43rd mass-produced folding screen mobile phone since the launch of the first folding screen mobile phone in 2018. Samsung, Huawei, Xiaomi, OPPO, vivo, HONOR and other major terminal manufacturers have emerged on the folding screen mobile phone track.

Professional research institutions IDC and CINNO Research have both released statistical data on the folding screen mobile phone industry. Although there is a slight gap in the data collected by the two organizations, from an overall perspective, the shipment volume of folding screen mobile phones in the Chinese market last year was approximately 7 million units. The growth rate exceeds 100%.

Consumers' acceptance of foldable screen mobile phones continues to increase, and they also put forward more advanced requirements for the lightweight, durability, folding feel, screen flatness (fold reduction), etc.; Among them, screen flatness (fold reduction) is the most concerning issue.

Part One   Application test

In addition to the hinge design, the screen creases of folded mobile phones are also related to the screen structure. The sample measured this time comes from the flexible panel connection structure part.

Specific areas of the sample need to be coated with special materials in a specific arrangement. Due to the particularity of the materials, chromatic confocal technology is required to achieve measurement. Considering range, accuracy, efficiency and other factors, we will choose the 3D line confocal sensor HPS-LCX3000.

01 Test objects

02 Test requirements

Product name: Folding screen connection structure

Measurement items: Appearance inspection

Measurement requirements: clearance, height, step difference, warpage

03 Test process

The sample was scanned using the 3D line confocal sensor HPS-LCX3000.

The 3D line confocal sensor HPS-LCX3000 is a non-contact optical detection sensor based on the chromatic confocal principle. The Z-axis repeatability is 0.4μm and the X-direction resolution is 4.9μm. It can record detailed original data and generate multiple data in one scan. Various forms of 2D/3D images can be used to complete high-precision 3D measurements of almost all material surfaces such as transparent, mirrored, and highly reflective surfaces.

04 Test results

The above information can be obtained by using the Hypersen 3D line confocal sensor HPS-LCX3000 to precisely measure the sample.

Part Two Product Introduction

Hypersen HPS-LCX series is a non-contact optical precision measurement sensor based on the principle of chromatic confocal method. It has the characteristics of fast detection speed, high imaging resolution and strong material adaptability.

01 Product advantages

The product uses line scanning CMOS imaging to achieve 3D feature analysis of the appearance of the object to be measured, technically breaking through the limitations of traditional detection methods, and the measurement process is not affected by the intensity of reflected light.

02 Industry Application

It effectively solves the problem of high-precision appearance inspection of transparent objects, highly reflective mirrors, black rubber and other materials in the industry, and is suitable for online inspection applications in 3C electronics, semiconductors, automotive electronics, medical and scientific research and other fields.

Hypersen Technology (Shenzhen) Co., Ltd. is a domestic high-end industrial sensor manufacturer with cross-professional fields and comprehensive R&D capabilities. Its main products include 3D optical profilometer, 3D line confocal sensor, chromatic confocal sensor, high-speed industrial camera, 6-Axis force sensor and various laser detection sensors.