The basic structure of the screen is composed of decryption and contrast
When it comes to screen technology, the evolution from IPS and AMOLED to today’s OGS full-fit screens has been quite fascinating. Apple, in particular, has always emphasized a more premium feel, with features like ultra-thin, highly transparent displays that make images seem to "emerge" from the screen. This is where In-Cell and On-Cell technologies come into play. I’m here to break down what OGS, In-Cell, and On-Cell really mean—keeping it simple so everyone can understand the basics without getting lost in technical jargon. To truly grasp these technologies, it's important to first understand the basic structure of a smartphone screen. Typically, a screen is made up of three main layers: the protective glass (often referred to as Cover Glass), the touch layer (which includes the ITO film and substrate), and the display panel itself. The display panel is further divided into components like the color filter substrate, liquid crystal layer, and thin-film transistor (TFT) substrate. The protective glass is usually something like Corning Gorilla Glass, while the touch layer consists of ITO films and substrates. Between the protective glass/touch layer and the display panel, there's typically an air gap created by bonding techniques. However, when manufacturers use full-fit technology, this air gap is eliminated, reducing reflections and making the screen look more transparent when on, and darker when off—without that annoying grayish tint. Traditional G/G and GFF screens follow a standard structure: protective glass + touch layer + display panel. The difference lies in how the touch layer is constructed. G/G uses one ITO glass and one ITO touch film, while GFF has two of each, making it slightly thicker than G/G. Today, many manufacturers boast about OGS, In-Cell, and On-Cell screens. These all aim to reduce thickness and improve transparency by integrating different layers. The key difference is where the touch layer is placed. OGS integrates the protective glass and touch layer, while In-Cell and On-Cell integrate the touch layer directly into the display panel. This distinction is crucial for understanding their performance and design choices. You might wonder: What’s the difference between In-Cell and On-Cell? It comes down to where the ITO film is embedded. On-Cell places the ITO on the top glass of the display panel, as seen in Samsung’s flagship models. In-Cell, on the other hand, embeds the ITO beneath the glass, often fused with the liquid crystal layer, as used in Apple’s iPhone 5. Each screen type has its own strengths and weaknesses. For example, OGS offers the best transparency and visual clarity, followed by In-Cell and On-Cell. However, some domestic phones using OGS, like the Meizu MX3, actually outperform high-end models like the iPhone 5 or Galaxy S4 in terms of pure screen clarity. In terms of weight and thickness, In-Cell is the lightest and thinnest, which helps devices like iPhones achieve extreme slimness. OGS is next, while On-Cell is slightly bulkier. Regarding durability, On-Cell tends to be the strongest, followed by OGS, and then In-Cell, which is more fragile due to its integration with the display panel. Touch sensitivity also varies. OGS generally offers better responsiveness, but too much sensitivity can cause issues like “jitter†or “misoperation,†especially with dust or moisture. Multi-touch and stylus support are usually better on OGS compared to In-Cell or On-Cell. In-Cell, however, requires additional touch chips to manage noise and improve accuracy. From a manufacturing standpoint, In-Cell and On-Cell are more complex and harder to produce. Initially, In-Cell had low yields, causing supply issues for products like the iPhone 5. But as technology improves, yields have caught up with OGS, making mass production feasible. In short, choosing the right screen technology depends on your priorities—whether it’s transparency, thinness, durability, or touch performance. Understanding these differences can help you make a more informed decision when buying a new phone.
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