01Overview of Screen Technology
◆ Basic structure of capacitive touch screen
In the evolution of touch screen technology, we have witnessed the competitive landscape from IPS, AMOLED, SLCD to OGS, while also witnessing the rise of In cell and n-cell technologies. In order to gain a deeper understanding of the three screen technologies of In Cell, On Cell, and OGS, we first need to analyze the basic structure of the screen. The structure of a capacitive touch screen is divided into three layers: the top layer is a glass cover plate, which is responsible for protecting the screen and transmitting tactile sensations; The middle layer is a capacitive touch layer, responsible for sensing and responding to touch signals; The bottom layer is the display panel, responsible for presenting images and colors.
The capacitive touch layer is composed of an ITO touch film layer and an ITO substrate. The display panel consists of an upper substrate, a liquid crystal layer, and a lower substrate from top to bottom. In the early days, frame pasting technology created a layer of air between the touch layer and the display panel, which affected the display effect. However, by using full lamination technology to eliminate this layer of air, the reflection problem of the screen has been significantly improved, making it more transparent when lit up and darker when turned off, eliminating the gray and white appearance.
Differences in Traditional Screen Structure
Traditional G/G and GFF screens both follow a similar structure: cover glass, touch layer, and display panel. But the difference in touch layer is the key to these two screens. Specifically, the structure of G/G and GFF screens is similar, with the main difference being the touch layer. The touch layer of G/G screens consists of one layer of ITO substrate and one layer of ITO touch film, while the touch layer of GFF screens consists of two layers of ITO substrate and two layers of ITO touch film (named ITO: X and ITO: Y respectively). Obviously, G/G screens have an advantage in thickness.

Comparison of Emerging Screen Technologies
Nowadays, OGS screens are favored by touch panel manufacturers, while In Cell and On Cell screens are highly regarded by display panel manufacturers such as Apple LG、 Samsung and Sharp, among others. Both of these screen structures have abandoned the traditional touch glass layer, thus achieving a thinner and lighter design. However, the key difference between the two lies in the integration position of the touch layer. Specifically, the OGS screen uses the same glass to achieve touch functionality; In Cell embeds the touch film layer into the display panel; On Cell places the touch film layer on top of the upper substrate. This difference affects screen design and performance.

02Comparison of In Cell, On Cell, and OGS
◆ Display effect differences
OGS screens perform better than In Cell and On Cell in terms of transparency and visual effects. Therefore, although well-known brands such as Apple and Samsung use In Cell screens, their simple screen transparency and visual effects are not superior to some domestic phones that use OGS screens.
◆ Lightweight and impact resistant
In terms of lightness and thinness, In Cell stands out with its lightweight and compact features. In Cell is the lightest and thinnest due to the integration of the touch layer into the display panel, which is also one of the reasons why iPhone can maintain its lightness and thinness even with a metal body. In contrast, OGS and On Cell are slightly inferior in terms of thinness. In terms of screen impact and drop resistance, On Cell performs the best, followed by OGS, while In Cell is relatively weaker. It is worth noting that OGS, by combining the cover glass with the touch layer, may weaken the strength of the glass during the processing, making the screen relatively fragile.

◆ Touch effect and technical complexity
OGS screens have higher sensitivity, while In Cell and On Cell interaction have lower sensitivity, but rely less on touch chips. High sensitivity may also bring problems, such as "screen jumping" phenomenon, which may be caused by fine dust, sweat or water vapor leading to misoperation of the touch screen. In contrast, in Cell screens directly integrate touch and liquid crystal layers, resulting in higher sensing noise and requiring specialized touch chips for filtering and correction. OGS and On Cell screens have relatively low dependence on touch chips.

Production cost and yield rate
From a technical perspective, the technical complexity of In Cell and On Cell is higher than OGS, and the difficulty of production control also increases accordingly, leading to an increase in manufacturing costs. In terms of yield, the initial production yield of In Cell screens was relatively low, which affected the supply of iPhone 5. But with the continuous technological investment and process improvement of manufacturers, In Cell technology was once affected by low yield rates, and now the yield rate has increased, approaching On Cell and OGS.

1、 Original screen
Original screen refers to a screen produced by a mobile phone manufacturer that is identical to the original screen of the phone. The advantage of this screen is its superior quality and good compatibility with other parts of the phone, ensuring the best display effect and user experience. However, the price of original screens is usually higher due to their production costs and strict quality control. If your phone is still under warranty or you have high demands for screen quality, choosing an original screen is a good choice.

2、 OEM Screen
OEM (Original Equipment Manufacturer) screens are screens produced by partners of mobile phone manufacturers, with similar quality to original screens but usually at a more affordable price. The production process of OEM screens also follows strict standards, so their display effect and service life can be guaranteed. If your budget is limited but you want to get a user experience close to the original screen, then OEM screens are a cost-effective choice.
3、 Compatible with screens
Compatible screens are screens produced by third-party manufacturers, designed to be compatible with multiple phone models. The price of this type of screen is usually lower, but the quality and display effect may vary depending on the manufacturer. When choosing a compatible screen, it is recommended to carefully compare products from different brands and models to ensure that they meet your usage needs. Although screen compatibility may pose certain risks, it is still a viable option if you do not have high requirements for your phone screen or have a very limited budget.

4、 Press fit screenPress fit screen is a type of screen that combines a display screen and a touch screen. The advantage of this screen is that it is reasonably priced, and the display effect and user experience are relatively good. However, the compatibility and stability of laminated screens may not be as good as original or OEM screens, so careful consideration is needed when choosing. If your phone model is relatively rare, or if you do not have high requirements for the display effect and stability of the screen, then pressing the screen may be a suitable choice.
When choosing a mobile phone screen, in addition to considering the screen type and price, it is also necessary to consider the convenience of installation and maintenance. If you do not have the relevant technical knowledge, it is recommended to seek the help of professionals to ensure a smooth screen replacement process.

1、 Understand the difference
In the field of mobile phone repair and maintenance, the terms "original screen" and "factory screen" are often heard, which sound similar but actually have significant differences.
Original screen "refers to a screen produced by an original equipment manufacturer (OEM), which is provided by the device manufacturer and therefore has high quality and consistency. However, they may not be produced on original equipment.Original screen "refers to a screen produced by an authorized manufacturer, usually on the equipment of the manufacturer, with high quality and consistent manufacturing standards.
2、 How to choose the appropriate screen
Choosing the right screen is crucial when you need to replace your phone screen. Here are some suggestions for selecting the correct screen:
1. Get to know your phone. It is very important to understand your phone brand, model, and screen size before purchasing any phone accessories.
2. Choose a screen of appropriate quality. Choose high-quality screens, purchase from mobile phone manufacturers or authorized service centers, and ensure they provide warranty and support.
3. Identify the screen. If you are unsure whether you have obtained an original screen or a factory screen, you can observe the screen features and display quality to make a judgment. Original screens may sometimes have minor flaws or defects, while factory screens typically do not experience such issues.
3、 Summary
When it is necessary to replace the phone screen, it is particularly important to understand the difference between "original screen" and "factory screen" and choose the correct screen. Although these terms sound similar, they have different meanings and uses. Choose a high-quality screen and purchase it from a mobile phone manufacturer or authorized service center to ensure that you will receive support and warranty.

1、 External reasons


① Charger data cable


When charging with a non original charger data cable, the voltage is unstable, which can cause the screen to malfunction and jump. It is recommended to disconnect and replace the charger data cable.



② Screen protector film


Poor quality tempered film may affect the touch effect. It is recommended to tear off the film and check if the sensitivity is restored.



③ Water or dirt on hands



You can try wiping the screen of your phone with a tissue to remove any oil stains that may cause touch drift.



④ There is static electricity present


Static electricity on mobile phones can also be uncontrollable. In this case, you can lock the screen and charge the phone for ten minutes to solve the problem.



2、 System reasons


① Software issues


Determine whether it is a certain software or all software fixed area touch failure. If a single software is not sensitive in that area, it may be due to software issues. If all software has the same location touch failure, it is a screen problem and needs to be repaired.



② Too many backend software


Opening the software in the background is likely to cause the mobile phone to get too laggy, and the screen is not sensitive. Try to close the background running software.



③ System issues


If there are many applications installed on the mobile system and the phone configuration is not high, it is easy to cause insufficient phone resources, so this phenomenon may also occur. It is recommended that you try to restore the factory settings or flash the phone.



④ Crash or false crash


It can be resolved by turning off the screen or restarting the phone.



3、 Screen related reasons


Touch failure caused by the screen itself: such as dropping the phone, loosening the LCD screen cable after liquid ingress, and corrosion of the touch IC. These hardware damages can cause the screen to drift and touch failure.



How about it, have you learned how to judge?



It should be noted that the hardware failure of the screen itself involves the repair of internal parts of the phone, which cannot be repaired by an individual. It is necessary to seek professional maintenance personnel for repair and replacement. Do not disassemble or repair it yourself to avoid losses.

1. Methods to Repair a Phone Screen

1. Replace the outer screen (pressure screen) using equipment

Screen pressing is a common method for repairing cracked phone screens, primarily used when the outer layer of the screen's glass is damaged. Since it involves repairing the outer screen, the inner screen of your phone must remain intact to proceed with this method. The process involves reattaching the new outer glass layer with the display layer and then using specialized equipment to press them together, ensuring a secure bond. The advantage of this method is its relatively low repair cost, and it does not affect other functions of the phone after the repair.





However, it should be noted that screen pressing requires professional equipment and technology, which cannot be operated by ordinary repair shops, and it is also impossible to press the screen by oneself.



2. Replace the entire screen

If our phone screen is severely damaged and the internal screen is already damaged (screen display is abnormal, screen leakage, lines, black screen), then we need to consider replacing the screen.



Screen replacement is the process of removing the entire screen and replacing it with a new one. The advantage of this method is that it can completely solve the problem, but the price of the original screen is relatively high, and reliable repairers need to be found to ensure the quality of the screen.

2、 The price for changing the screen

The price of screen replacement varies depending on the brand, model, and repair method. Generally speaking, if only the external screen is broken, we only need to find a professional repair shop to replace the external screen, which may cost around 120-350 yuan. It should be noted that replacing the external screen can only be done at the store, and those who can come to replace it are scammers.







If the internal screen is damaged, replacing the original screen may be more expensive. If you have high requirements, you can directly replace it with an original screen assembly. If the requirements are not very high, you can replace it with a brand screen assembly. If it is only a spare machine or just wants to export data, you can directly replace it with an assembled screen.



In addition, it is recommended to choose to have your phone screen repaired in store or by mail. Some home repair and screen replacement services often use an assembled screen to replace your original screen, especially if your phone only has a broken external screen. When replacing a phone screen, don't just look at the price. The price of replacing the external screen is closely related to the repair techniques of the technician. Some cheap repair shops have many tricks for replacing the external screen, such as not bearing the risk of the internal screen, which will ultimately lead to the price of repairing the screen increasing several times. The same goes for replacing the screen assembly. There are assembled screens, branded screens, press fit screens, face change screens, original disassembled screens, original touch screen replacement, screen replacement, and so on in the market. Anyway, remember that you get what you pay for. Try to repair the screen in a store that only does repairs.





In summary, if your phone screen is damaged and only the external screen is broken, we only need to replace the external screen. If the internal screen is damaged, we need to replace the entire screen assembly. We can choose the appropriate repair method according to our own situation. At the same time, when choosing a repair shop, it is necessary to choose a reliable merchant to ensure the quality and effectiveness of the repair.