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1Difference between In cell and On cell

With regard to the hype of the screen concept, Apple came up with the concept of In-cell/On-cell.
To thoroughly understand In-Cell/On-Cell/OGS and other screens, you must first know the basic structure of the screen. From top to bottom, the basic structure of the screen is divided into three layers, protective glass, touch layer, display panel


Protective Glass: Like Corning Gorilla Glass .

Touch layer: It consists of ITO touch film and ITO glass substrate.

Display panel: From top to bottom, they are the upper glass substrate, the liquid crystal layer, and the lower glass substrate (thin film transistor substrate). Between the protection glass/touch layer and the display panel, the general attachment technology will form a layer of air. If full-fit technology is used to remove this layer of air, the screen reflection will be greatly reduced and the screen will become more transparent. The screen is darker and there is no gray color.

The traditional G/G and GFF screens are all standard protective glass+touch layer+display panel layers. The difference lies in the touch layer. The touch layer of the G/G screen is composed of a layer of ITO glass substrate and +1 layer of ITO touch film. The touch layer of the GFF screen has two layers of ITO glass substrate and two layers of ITO touch film (ITO: X and ITO). :Y). Obviously, the G/G screen is thinner.ot detect input by gloved hand. Some surface capacitive touch screens may detect touches by thin-gloved hand, but they do not support the combination use of bare finger and gloved finger. Some surface capacitive touch screens support pen writing, but they usually does not support combination use of finger touch and pen writing.

Why OGS screens and In Cell / On Cell screens advertised by various manufacturers today ? Because they are both protective glass layer + display panel layer structure, a touch layer is less, more light and thin.

Where is the middle touch layer? This is the key to distinguish between the InCell/OnCell screen and the OGS screen. The InCell/OnCell screen integrates the touch layer and the display panel. The OGS screen integrates the protective glass layer and the touch layer.

In-Cell, On-Cell, and OGS are different because of their different structures, the lightness of the screen, the display effect, the manufacturing cost, and the yield rate:

1. OGS is the best in terms of screen transparency and visual effects, followed by In-Cell and On-Cell.

2. Thinness, generally speaking, In-Cell is the lightest and the thinnest. This is one of the reasons why the iPhone uses a metal body and can still be extremely light and thin. After OGS, On-Cell is slightly worse than the previous two.

3. Screen strength (impact resistance, drop resistance), On-Cell is the best, OGS is the second, and In-Cell is the worst.

4. In terms of touch, OGS has better touch sensitivity than On-Cell/In-Cell screens, but this is sometimes not a good thing. The high sensitivity of OGS is prone to "crossover". Subtle dust, sweat, and water vapor can cause "misoperation" of the touch screen. In addition, because the In-Cell screen directly fuses the touch layer with the liquid crystal layer, the sensing noise is large, and a dedicated touch chip is required to perform filtering and correction processing. The dependence of the OGS screen on the touch chip is not so high.

5. Technical requirements, In-Cell/On-Cell are more complex than OGS, and production control is more difficult.

6. In terms of yield, the previous In-Cell screen had a lower yield rate. Affected the products such as iPhone5 to a large extent, but as the manufacturer continues to invest, the technology matures, the good product rate of In-Cell/On-Cell screen and OGS are already in the same level, large-scale shipment is not a problem.