TheFirst, the application of anti-glare glass in 3C products
The
Due to the continuous evolution of touch products, the demand for anti-glare and anti-reflective light has been continuously increasing due to the increasing outdoor use volume (see Figure 2). The use of glass has not only been demonstrated in TFT-LCD, TP and other electronic products. In part, new glass applications are born as a result of demand, especially in the components of notebook computers and other portable electronic products.
The
In recent years, in the CG (Cover Glass) glass processing industry, so-called anti-reflective or anti-glare glass has been widely introduced. The English name is AG Glass (Anti-Glare Glass).
The
The production principle of AG Glass is to perform an agent on the surface of the original glass, and this processing method is divided into physical and chemical methods. The glass processing can be single-sided or double-sided. The glass after processing is characterized by making the original glass reflective surface weaker. Reflective surface (glass surface is slightly uneven). Compared with the original glass, it has a lower reflectance, and the light reflectance will be significantly reduced to allow the display to show more clear and transparent visual effects. Early in Schottu, XensationTM Cover AG (Anti-Glare) has been published.
The
TheSecond, anti-glare glass product specifications and measurement methods
The
General anti-glare glass (AG Glass) has its own specific specifications for different product applications. If it is used on CTP touch products, because the screen involves visual light, the haze (%) of the glass cannot be used. Too high will affect the performance of LCM penetration. If the anti-glare glass is used in other electronic touch products, such as decorative coatings (non-vision products), it will be biased to feel requirements, Ra (average roughness of the centerline ) will be the focus of the request (Figure 5). However, if it is a high-resolution mobile phone product, the fixed bumpy points generated by the process in the anti-glare glass will form a sparkle point after the LCM light is incident, which will be obvious when viewed with the naked eye, so it is not suitable. The use of high-end display products.
The
Anti-glareglassThere are two methods: macroscopic and microscopic
The
(1) Macroscopic inspection: The product part will confirm whether the anti-glare treatment surface contains visually detectable streaks, pinholes, spots, and similar defects;
The
(2) Microscopic inspection: The product measurement section will confirm whether the four different values, such as Haze, Gloss, Ra, and Transmittance, are within the set specifications. The definitions of the four measurement values are as follows:
The
A. Haze:
The
When a parallel light beam enters the medium, the light beam changes its direction due to the non-uniformity of the optical properties of the material. The generated scattered light is called scattered light. Internationally, the ratio of the scattered light flux to the transmitted light flux that deviates from the incident light direction through the sample is used. Expressed in percent. In the process of measuring the haze and transmittance of the sample, the incident luminous flux (T1), the transmitted luminous flux (T2), the instrument scattered luminous flux (T3), and the scattered light flux (T4) of the sample must be measured. A simple instrument on the general market will ignore the T3 test value, that is, T3=0. The formula is as follows: Transmittance: Tt=T2/T1×100%; Haze: Haze=T4/Tt×100% (T3=0). (Ref 3)
The
B. Gloss:
The
Luster is an appearance of the object optical properties, the surface of the smooth material when exposed to visible light will produce a directional mirror reflection, the result of the mirror reflection of the material surface with a gloss called mirror gloss, the reflective ability of the size of the mirror Gloss. Unit=Gloss Unit(GU)
The
G=K×F2/F1=100×ρ/ρ3 (Ref 4)
The
G: gloss value of the sample.
The
F1: Luminous flux incident on the sample surface.
The
F2: Directly receives the reflected light flux from the surface of the sample.
The
K: the constant to be determined, K=100/ρs.
The
Ρs: reflectivity of the standard board.
The
Ρ: The reflectivity of the sample.
The
C. Centerline roughness (Ra):
The
If a measurement length L is cut from the rough curve of the processing surface, and the central line of the depth and depth in the length is taken as the x-axis, and the vertical line of the center line is taken as the y-axis, the y=f(x) table can be used as the rough curve. The. Use the center line as a benchmark to reflex the lower curve. (Ref 5) Then calculate the area covered by the full curve above the centerline and divide it by the measured length.
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