What's Difference of Anti Glare Anti Reflection Anti Finger on Cover lens Touch Screen?

What is Anti Glare(AG)?

What is anti-glare, it is a kind of glass with special processing on the glass surface. Its characteristic is to change the reflective surface of the original glass into a matte non-reflective surface. The principle is to subject both sides or one side of high-quality glass sheets to special processing. Compared with ordinary glass, it has a lower reflectance. The reflectance of light is reduced from 8% to less than 1%, allowing users to pay more attention to the expected image instead of the reflected image, because it is too much anti-glare (or light scattering). ) Will negatively affect the overall clarity of the display. Therefore, if the product is applied outdoors or in a strong light environment, you can do AG processing on the touch screen, so that the image in the display can be seen more clearly, so that the viewer can experience a better sensory vision.

In our daily life, we all have the experience of being attacked by glare, partly from the glare light source, and partly from the reflection of the glare; when we operate the computer, we often worry about the reflection of the scene outside the display on the surface of the display and the display content cannot be seen clearly; Another example is when we stop in front of the glass shop window to explore the scenery inside the window, the reflection of the glass surface often prevents you from clearly observing the scenery inside the window and so on. These are all caused by light reflection on the glass surface, because ordinary glass has a high reflectivity. To reduce the influence of light reflected by glass, matt (anti-reflection) treatment on the glass surface can have a good effect. Anti-Glare Glass products are made through a special chemical process, which is characterized by changing the reflective surface of the original glass into a matte diffuse reflective surface. It can blur the effect of reflection, prevent glare, and reduce the degree of reflection, reducing light and shadow. The anti-glare product has strong surface anti-corrosion and anti-scratch performance. Combined with the video imaging screen, a transparent anti-glare and anti-reflection screen can be formed, which solves the problem of reflection and glare caused by electronic video screens and image screens under environmental light sources, and improves image quality. This effect remains unchanged under a large viewing angle. Anti-glare glass can reduce the interference of ambient light, increase the viewing angle and brightness of the display, reduce the reflection of the screen, make the image clearer, the color more colorful, and the color more saturated, thereby significantly improving the display effect. So if you are using outdoor application equipment, we strongly recommend that you can add an AG effect on the touch screen。

What is Anti Reflection(AR)?

AR anti-reflection glass (Anti-reflection glass) is also known as increased transmission glass or anti-reflection glass.

AR glass is an optical coating on one or both sides of the glass to reduce the emissivity and increase the light transmittance, reduce surface glare and increase the light transmittance and brightness of the substrate, while reducing the surface reflectivity of specific light waves to provide Better contrast sharpness. Compared with ordinary glass, it has a lower reflectance and reduces the reflectance of light to less than 1%. AR coating on the glass surface can minimize and possibly eliminate ghosting and multiple reflections. The AR coating can be single-layer or multi-layer, and the standard broadband AR can reduce the surface reflectivity from 4% to 0.5%.

Multiple layers with different refractive indexes change the direction in which light is reflected. The human eye cannot see the anti-reflective film, but it can leave a soft blue-green color, which may be subtle. In applications requiring high light transmittance through the touch panel and when there is a higher intensity of reflected light (for example, outdoors), an anti-reflectionis preferable.

What is difference of Anti glare and Anti Reflection?

1.Different Function:

AG glass (anti-glare glass ), also known as anti-reflective glass and anti-glare glass, is used to "reduce glare reflection or direct light."

AR glass ( anti-reflection glass), also called anti-reflection glass, is used to "reduce reflection and increase transmission."

Therefore, in terms of optical parameters, AR glass has more functions to increase light transmittance than AG glass.

2.Different Principle:

AG glass: After "roughening" the glass surface, the reflective surface of the glass (flat mirror surface) becomes a non-reflective matt surface (a rough surface with unevenness). Compared with ordinary glass, it has a lower reflectanceof sunshine. The reflectance of light is reduced from 8% to less than 1%. The technology creates a clear and transparent visual effect, allowing viewers to experience better sensory vision.

AR glass:using theforemostmagnetron sputtering coating technology in the world to coat a layer of anti-reflection film on the surface of ordinary strengthened glass, which effectively reduces the reflection of the glass itself, increases the transmittance of the glass, and makes thefisrttransparentthecolours of the pasted glass are more vivid and real.

3.Different Use Environment

AG Glass Use Environment

1)Strong light environment. If there is strong light or direct light in the environment where the product is used, such as outdoors, it is recommended to use AG glass, because the reflective surface of the glass becomes a matte diffuse reflective surface due to the AG processing, which can make the reflective effect blur. In addition to preventing glare, it also reduces reflectivity and reduces light and shadow.

2)Harsh environment, in some special environments, such as hospitals, food processing, exposure to the sun, chemical plants, military industry, navigation and other fields, the glass cover must not be peeled off.

3)Contact with touch environment, such as plasma TV, PTV rear projection TV, DLP TV splicing wall, touch screen, TV splicing wall, flat panel TV, rear projection TV, LCD industrial instrumentation, mobile phone and advanced photo frame and other fields.

AR Glass Use Environment:

The high-definition display environment, such as the use of products, requires high-definition, rich colors, clear levels, and eye-catching; for example, if you want to watch high-definition 4K when watching TV, the picture quality must be clear, the colors must be dynamic, and reduce color loss or color difference.. .... Places within sight such as museum showcases and displays, telescopes in the field of optical instruments, digital cameras, medical equipment, machine vision including image processing, optical imaging, sensors, analog and digital video screen technology, and computers Technology, etc., as well as art exhibition glass, watches, and so on.

How to Choose Best One for Your Project, AG or AR?

1)Light transmittance:

The light transmittance of float AG glass is 89%~91%, Gorilla Glass can reach about 93% after AG is etched, and the glass gloss after AG coating can reach 98.5~99%. If the transmittance of the end product to the glass cover exceeds 93%, it basically needs to be AR-plated to correspond.

Product cost: AG glass and AR glass are at least 50% more expensive than a piece of smooth glass due to processing technology and processing technology. Therefore, whether to use AG glass or AR glass depends on the needs of the product itself. For example, some car display customers need the combination of AG glass and AR glass.

2)Size:

At the same cost, the size range of AG glass processing is larger, and the AR glass processing process with better quality or durability is mainly vacuum sputtering. This process determines that the size of the glass cover cannot be too large. Therefore, in the small size, especially the size similar to the size of the protective cover glass of the camera lens, the benefit of using AR glass is higher.

3)Strengthening conditions:

AR glass is coated after strengthening, and the surface treatment is basically in the finished state. The AG glass is frosted and polished on the surface of the original sheet, and then cut after the finished product.

4)Use environment:

If there is strong light or direct light in the use environment of the product, such as outdoors, it is recommended to use AG glass, because the reflective surface of the glass becomes a matte diffuse reflective surface due to the AG processing, which can blur the effect of reflection and prevent glare. It also reduces the reflectance and reduces light and shadow. Moreover, because AG glass is etched to about 0.05mm of the glass depth, it can be guaranteed not to fall off. In some special environments, such as hospitals, food processing, chemical plants, military industry, navigation and other fields, it is necessary to use the glass cover plate without surface peeling phenomenon. AG glass. Although AR glass coating technology is developing by leaps and bounds, after all, a new substance is formed on the glass surface, so it will fall off.

What is Anti Finger(AF)?

The anti-fouling coating we hear every day is one thing, namely AF (Anti Finger Print) anti-fingerprint coating, which is called Oleophpbic coating in English. The smooth feel of the new mobile phone screen usually comes from the anti-fingerprint oil.

AF material is a fluorine-containing coating with extremely low surface tension, generally called perfluoropolyether. Its main function is to adhere to the surface of the screen and increase the hydrophobicity, oil drainage, and anti-fouling properties of the screen. It is widely used in mobile phones, On the protective glass of flat panels, monitors, and SLRs, we, who often use electronic products with screens, basically always have access to them. This hydrophobic and oleophobic effect is the same as water drops falling on the lotus leaf.

AF materials are mainly divided into two forms: liquid medicine and target pellets (similar to small pellets), which are suitable for spraying and vacuum evaporation respectively. After the glass is coated and cured at a high temperature, the AF coating remains on the surface of the screen. In addition to anti-fouling, the AF coating also has the characteristics of wear resistance and high light transmittance. It is vacuum evaporated and the AF coating with a higher concentration is retained. 1, 2 years are not a problem.

What is theUse of Anti-Finger print in Daily Use?

Directly speaking, the functions of anti-fingerprint oil, such as hydrophobicity, oil drainage, and anti-fouling, are not intuitive enough. Let's give an example to briefly explain: Due to the popularity of 2.5D screens, many people will choose ordinary mobile phone protective film, but cheap mobile phone protection There is no hydrophobic and oleophobic layer on the membrane. This kind of protective film is obviously jerky and rough in sliding touch. When we play mobile phones for a long time, there will be a lot of fingerprint stains on the protective film, and it is not easy to wipe clean, and will further increase the sliding resistance.

Similarly, whether there is anti-fingerprint oil on the mobile phone screen glass is a reason. Without fingerprint oil, there will be a more obvious sense of sliding resistance, and it is easy to leave fingerprint stains and is not easy to wipe. The panel glass with fingerprint oil will reduce the resistance to touch sliding a lot, although fingerprints are still left, but it is easier to wipe.

How to Identify whether there is A Hydrophobic And Oleophobic Layer on the Touch Screen Device?

The water drop angle is defined as the angle between the gas-liquid interface and the solid-liquid interface at the three-phase interface of solid, liquid, and gas. The water drop angle is a measure of the moisture on the surface of a solid, and most solids are used. For the purpose of measurement, a low contact angle of a water droplet means that a surface with high humidity (hydrophilic) is easy to adhere. A high water drop contact angle indicates that the surface exhibits hydrophobicity, and the surface has serious organic contamination or poor surface adhesion.

Place the water drop on the touch screen device. If the contact angle of the water droplets is obtuse, the glass surface will be anti-fingerprint. If the contact drop angle is acute and the angle is small, the glass surface will not be covered by anti-fingerprints. At the same time, the surface of the anti-fingerprint glass is not wet, and water droplets can slide on the screen under the action of gravity.

You can also use a small sprayer to spray on the screen. If many small water droplets are formed on the glass surface, the glass surface will be covered with anti-fingerprint oil; if the water represented by a glass cup is one piece, the glass surface will not be covered by anti-fingerprints.