The competition of smart phones is becoming more and more fierce. Many manufacturers hope to highlight themselves through the differentiation of hardware. New terms such as IPS, SLCD, retina, ClearBlack and so on are constantly emerging. Many times, new technical terms are born before we understand new technologies. Recently, many mobile phone manufacturers have begun to add selling points to their mobile phones with the technology of "full fit"? Let's have a look at what it is.

Screen structure

From the structure of the screen, we can roughly divide the screen into three parts: protective glass, touch screen and display screen from top to bottom. These three parts need to be fitted. Generally speaking, they need to be fitted twice, once between the protective glass and the touch screen, and the other time between the display screen and the touch screen. According to the fitting method, it can be divided into full fitting and frame fitting.

Frame sticker

The so-called frame sticker is also known as the adhesive bonding, that is, the touch screen and the four sides of the display screen are simply fixed with double-sided adhesive tape, which is also the bonding method used by most display screens at present. Its advantage is that the process is simple and the cost is low. But because there is an air layer between the display screen and the touch screen, the display effect is greatly reduced after the light refraction, which is the biggest drawback of the frame sticker.

Full fit

Full bonding means that the panel and touch screen are completely bonded together in a seamless manner with water glue or optical glue. Compared with the frame sticker, it can provide a better display effect.

Full Fit Benefits

The full fit technology eliminates the air between the screens, which helps to reduce the reflection between the display panel and the glass, make the screen look more transparent, and enhance the display effect of the screen. At present, some mobile phones such as iPhone 4S, Mi2, Nexus 7 and Ascend D1 also use full fit technology. In addition, Apple's latest iMac also uses full fit technology.

 

IMac reflection with full fit technology can be reduced by 75%

Another advantage of full fit technology is that the screen will no longer be grayed out. The touch module also has improved its strength due to its close combination with the panel. In addition, the full fit can effectively reduce the interference of the display panel noise on the touch signal.

Although the advantages of full fitting are huge, the yield rate is relatively low. The consumption and scrap of surface glass and even panels in the fitting process due to poor yield rate will inevitably lead to an increase in cost. Therefore, the control of the yield rate of defoaming and fitting will become a more important factor than the cost of materials.

Since the full fit technology has significantly improved the display effect of the screen, it will certainly be a battleground next, and the investment of many manufacturers will also help to reduce costs and speed up the improvement of yield. It is believed that the full fit technology will be widely used in most of our mobile phones in the near future.

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