The difference between in cell and on cell

For the recent various mobile devices on the screen analysis of many, there are many IPs Amoled SLCD panel controversy, but the market launched a batch of ogs full fit screen, thin, light transmittance, and touch-control icon at the fingertips of the feeling. But Apple has been using IPs screens, so with more discussion of the in cell and on cell, today is a summary of screen technology contention.

　　Display Incell On-cell

About the screen concept of hype, from the previous IPs, AMOLED, SLCD panel of contention, to now exclusively flaunt themselves is ogs full fit screen, how thin, light, image "emerging" on the screen, Apple seems more "high-end", the concept of the In-cell/on-cell. Do this issue on the Ogs/in-cell/on-cell screen of the popular science, and strive to be easy to understand, look at the simplest way to let everyone know the truth.

To thoroughly understand in-cell/on-cell/ogs and so on screen, you have to know the basic structure of the screen.

From top to bottom, the basic structure of the screen is divided into three layers, protection glass, touch layer, display panel.

Protect the glass nothing to say, Corning Gorilla Glass is. The touch layer is made up of Ito touch film and Ito glass substrate. The display panel can be subdivided to a high degree, which is only roughly arranged here: from top to bottom, it is on the glass substrate (pink labeled Colorfiliter area, that is, color filter substrate), the liquid crystal layer (blue bar), under the glass substrate (pink labeled array area, that is, thin film transistor substrate). Finally, it is also necessary to point out that the protection of the glass/touch layer and the display panel, general laminating technology will form a layer of air (that is, the picture labeled the golden area of the bonding), if the use of full laminating technology to remove this layer of air, screen reflection will be greatly reduced, lighting the screen will appear more transparent, when the screen is more black, There is no gray-grey perception.

The traditional g/g, GFF screen, are standard protective glass + touch layer + display panel layer structure, the difference is the touch layer. The touch layer of the g/g screen is composed of 1 layers of ito glass substrate + 1 Layer Ito Touch film, and the GFF screen has 2 layers of ito glass substrate + 2 layer Ito Touch Film (Ito:x and Ito:y). Obviously, the g/g screen is thinner.

Today, the manufacturers advertised ogs screen, Incell/oncell screen, why it is worth boasting, because they are protection of the glass layer + display panel layer structure, less a touch layer, more frivolous. Where's the touch layer in the middle? This is exactly the key to distinguishing between the Incell/oncell screen and the ogs screen. The Incell/oncell screen integrates the touch layer with the display panel, and the OGS screen integrates the protective glass layer with the touch layer. In order to compete for industry discourse power, touch control module manufacturers push OGs, and display panel manufacturers such as LG, Samsung, Sharp and so on force In-cell/on-cell.

There may still be a further question, since the Incell screen and the Oncell screen are all integrated touch layer and display panel, how to distinguish between Incell and Oncell? This is related to the position of the ITO film embedded in the display panel. The so-called Oncell, that is, the Ito touch film is placed on the upper glass substrate of the display panel, which is what Samsung's Galaxy flagship has done; As for In-cell, the Ito Touch film is placed under the upper glass substrate of the display panel, typically fused with the liquid crystal layer, The representative model is an Apple iPhone5.

　　In-cell, On-cell, ogs because of different structure, the screen of light and light, display effect, manufacturing cost, good product rate are different.

1. OGs is the best in terms of screen penetration and visual effects, followed by In-cell and On-cell. So, boast how In-cell/on-cell how transparent, visual effect how good, can rest. Whether it is iPhone5 or Samsung GalaxyS4, pure screen permeability is actually inferior to some of the use of the ogs screen of domestic mobile phones, such as the charm of the family MX3.

2. Light and thin, generally in-cell the lightest and thinnest, which is one of the reasons why the iphone uses a metal fuselage and is also able to achieve extreme thinness. OGs is the second, On-cell is slightly worse than the previous two.

3. Screen strength (impact resistance, anti-fall), On-cell Best, ogs second, In-cell worst. It is important to point out that OGs is simply integrating Corning protective glass with the touch layer, the process weakens the strength of the glass and the screen is fragile. As for the In-cell screen why the intensity is poor, the author is not very clear about the reasons, this may be with the current Apple In-cell pursuit of the ultimate frivolous, Lumia920 is also the In-cell screen, but there is a good auxiliary design/measures to enhance the impact of the screen, the ability to fall. Also, it needs to be pointed out that because in-cell the touch layer with the LCD layer, once the touch screen is out of place, it needs to be replaced with the display panel.

4. Touch, OGs's touch sensitivity is better than the On-cell/in-cell screen, but sometimes it's not good. OGs technology does not pass, ultra-high sensitivity is very easy to "jump screen" phenomenon, subtle dust, sweat, water vapor can trigger touch screen "misoperation", such as MX3 the first batch of machines this problem is more serious. To multi-touch, finger, stylus touch pen support, in fact, OGs is better than In-cell/on-cell. In addition, or because the In-cell screen directly to the touch layer and the liquid crystal layer fused together, sensing noise is large, need to have a special touch chip for filtering and calibration processing. OGs screens are less reliant on touch chips.

5. Technical requirements, In-cell/on-cell are more complex than ogs, production control, the difficulty is also higher.

6. Good product rate, before the In-cell screen's low yield, to a large extent, affecting the supply of iPhone5 and other products, but as manufacturers continue to invest, technology to mature, In-cell/on-cell screen of good product rate and ogs already at the same level, large-scale shipments is not a problem.