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In-cell technology
May 30, 2018

The general principle of In-cell technology is to fuse the touch panel with the liquid crystal layer. The In-Cell technology uses a lighter screen, a lower thickness, and better light transmission, reducing the time required to fit the layers of the screen and increasing the time. Productivity. Today, I introduced several mobile phones that use the In-Cell technology screen.

The first and foremost question to be clarified is that various screen splicing technologies of current mobile phones are based on IPS (In-Plane Swiching) and they want to thoroughly understand the technology of In-Cell relative to OGS and On. -Cell's advantage, we must start with the screen.


In-cell principle

In simple terms, the basic composition of the mobile phone screen can be roughly divided into three layers: protective glass, touch layer, and display panel. Among them, the protective glass is the Corning gorilla glass that we often refer to; the touch layer is an ITO touch film and an ITO glass substrate; the display panel can be further divided into an upper glass substrate, a liquid crystal layer, and a lower glass substrate.

After the general protective glass, the touch layer and the display panel are affixed together, there is an air sandwich layer, and the full-fit technology can be roughly understood as the integration of the touch layer with other layers, thereby reducing the screen thickness and the air sandwich. The removal of the air sandwich will reduce the screen reflection significantly, the screen thickness will be lower, and it will be more transparent. When the screen is turned off, the black will be more completely non-gray, the strong light will have less reflection, and the screen will be clearer.


In-cell principle

The OGS technology integrates the protective glass and the touch layer, and the In-Cell/On-Cell technology combines the display panel and the touch layer. The difference is that On-Cell technology places the touch layer ITO touch film on the glass substrate on the display panel; In-Cell technology places the touch layer ITO touch film under the glass substrate on the display panel. .

Due to different structures, permeability: OGS> In-Cell/On-Cell; thinness: In-Cell> OGS> On-Cell; touch In-cell is inferior to OGS but it is not easy to appear “crossover” , And In-Cell technology is more complex, relatively low yield, so this is why the pursuit of ultra-thin mobile phone will use In-Cell but the overall proportion is very small, although the strength is relatively low In-Cell, but in fact It also depends on the design of the fuselage, not to compare here.


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