1. Determine the Type of Damage

- External screen damage: Touch function is normal, only the outer glass is broken.

- Internal screen damage: Display anomalies, lines, leaks, or touch malfunctions.

- Ribbon cable failure: Display works intermittently, may just need to reinsert the ribbon cable.

2. Preparations

Tools needed:

- Special screwdriver set (including Pentalobe and Phillips).

- Suction cup and pry tool.

- Hairdryer or heat gun.

- Anti-static gloves.

Part selection:

- OEM replacement screen (most expensive but best quality).

- Brand-compatible screen (best value for money).

- Low-quality screen (cheap but prone to issues).

3. Detailed Disassembly and Assembly Steps

- Safety shutdown: Press and hold the power and volume keys to shut down to avoid short-circuit risks.

- Heating to remove the screen: Evenly heat the edges at around 80°C for 2-3 minutes to soften the adhesive.

- Carefully separate: Gently lift the screen with a suction cup, slide a plastic pry tool along the edges, and pay attention to the position of the ribbon cable to avoid damage.

- Install the new screen: Disconnect the battery ribbon cable first, then dismantle the screen ribbon cable bracket, install the new screen, and test all functions.

4. Precautions

- Work in a clean, dust-free environment.

- Organize all screws to avoid confusion.

- Align all clips during installation.

- Test the new screen before applying adhesive.

5. Common Issues and Solutions

- Unresponsive touch screen: Check if the ribbon cable is properly inserted.

- Display anomalies: Try reinstalling the ribbon cable.

- Face ID failure: It may be due to damage to the front camera ribbon cable.

6. Repair Recommendations

For beginners without disassembly experience:

- Watch a complete disassembly video first.

- Have a spare phone ready in case of mishaps.

- Consider purchasing a screen kit with installation tools.

If you find the repair process difficult, seek professional help.

Remember, patience and attention to detail are the keys to successful repair. Don't get discouraged if your first attempt fails – practice makes perfect. Good luck with your iPhone screen repair! And remember, if you ever need professional repair services, don't hesitate to contact HRZ for assistance.

Everyone knows that a screen is composed of individual pixels, and what we call "1920 × 1080" actually refers to the number of vertical and horizontal pixels. The essential difference between OLED and LCD lies in their display principles. OLED can be simply understood as composed of countless red, green, and blue light bulbs that can emit light on their own, and macro display can be controlled by controlling the brightness and brightness of each bulb. And there will be a backlight panel on the back of the LCD, which displays different colors by passing through "filter paper" of different colors. ''



The working principle of LCD (Liquid Crystal Display) is to use liquid crystal molecules to change their alignment direction under the action of an electric field, thereby controlling the passage of light and achieving image display. LCD screens require a backlight source to illuminate the liquid crystal layer, and display is achieved by modulating the backlight source through the liquid crystal layer.



OLED (Organic Light Emitting Diode) is a self luminous display technology where each pixel can independently emit light without the need for a backlight source. When current passes through organic materials, light is emitted, and the brightness is adjusted by controlling the magnitude of the current.



Simply put, LCD is like a transparent piece of paper that requires sunlight or light to see the handwriting, while OLED is like a luminous panel that can emit light on its own.



What are the advantages and disadvantages of LCD and OLED screens compared?



The advantages of LCD are very obvious. Firstly, it does not have color cast like OLED. Secondly, LCD generally has full DC dimming or high-frequency PWM dimming. Therefore, another recognized advantage of LCD is that it is very eye friendly. In addition, LCD screens have a longer lifespan, even if it takes four to five years, it is difficult for the screen to burn out even if it turns yellow. LCD screens are more durable. ''

OLED screens have strong adaptability to new technologies, but they also have some drawbacks, such as easy burn-in, color cast, and relatively short lifespan. The burn-in phenomenon of OLED screens refers to the possibility of permanent pixel damage when a static image is displayed for a long time, resulting in residual images on the screen. And LCD screens do not have this characteristics of LCD OLED display principle: The backlight illuminates the liquid crystal layer, and the liquid crystal layer modulates the light to emit light independently. Each pixel can emit light independently. Advantages include eye protection, long lifespan, low screen burn-in, low cost, high contrast, fast response speed, and bright colors. Disadvantages include low contrast, slow response speed, uneven color, easy screen burn-in, color cast, and relatively short lifespan. Applications include televisions, computers, mobile phones, smart watches, VR devices, etc



From the table, we can see that LCD and OLED each have their own advantages and disadvantages, and there is no distinction between good and bad.





Is OLED or LCD better for mobile phone screens?



In fact, both types of screens have their own advantages and disadvantages. Although it cannot be directly measured by good or bad, what is certain is that due to the current development of smartphones towards full screen displays and the popularity of under screen fingerprints

From a technical perspective, OLED screens are the better choice because they are lightweight, have good display effects, and save power, all of which are means to enhance the user experience. From the user's perspective. ''



We also know that LCD technology has been developing for a long time and is more mature in terms of technology. Even with lower cost control, it can still display more natural and accurate color effects. ''



There is no standard answer to this question, and it needs to be judged based on individual usage needs and preferences.

If you are a user who pursues eye protection and durability, you can choose an LCD screen. LCD screens have better eye protection effects, longer lifespan, and are less prone to screen burn-in.



If you pursue the ultimate display effect, you can choose OLED screen. OLED screens have higher contrast, faster response speed, and brighter colors, which can bring a more immersive visual experience.





What are the future development trends of LCD and OLED screens?



In fact, there are significant differences between LCD and OLED in terms of display principles, energy consumption, and forms. OLED is relatively better as its light-emitting principle is more advanced. ''



With the continuous development of technology, both LCD and OLED screens are constantly advancing. The cost of LCD screens is decreasing, and there are also improvements in image quality and response speed. The lifespan of OLED screens is also constantly extending, and the problem of screen burn-in is gradually being solved.



In the future, LCD and OLED screens may be integrated and developed in more fields, such as Mini LED backlight technology and quantum dot technology, which will bring better picture quality and richer color performance.

**1. OLED screen**



OLED screen, also known as organic light-emitting diode screen, is a self luminous screen that does not require a backlight source. OLED screens have advantages such as self illumination, high contrast, and vivid colors, and can also be made very thin, making them very popular in mobile phone design. However, OLED screens also have some drawbacks, such as relatively short lifespan and susceptibility to screen burn-in.

The working principle of OLED screens is to utilize the characteristic of organic materials emitting light under the action of current. When current passes through organic materials, the materials emit light, thereby achieving image display. Each pixel of an OLED screen emits light independently, allowing for high contrast and high saturation color display. Meanwhile, OLED screens also have the advantages of fast response speed and low power consumption, making them very suitable for displaying dynamic images and videos.

The advantages of OLED screens also include:

-Thin and light: OLED screens do not require a backlight and can be made very thin, making them very suitable for portable devices such as smartphones.

-High contrast: OLED screens have a very high contrast ratio, reaching 100000:1 or more, allowing them to display very deep black and bright colors.

-Wide viewing angle: OLED screens have a very wide viewing angle, reaching over 180 degrees, so the color and contrast of the image will not change when viewed from different angles.

The drawbacks of OLED screens include:

-Relatively short lifespan: The organic materials of OLED screens have a relatively short lifespan and are prone to screen burn-in, which means that when the same image is displayed for a long time, traces will be left on the screen.

-High cost: The production cost of OLED screens is relatively high, so the price is also relatively expensive.

-Insufficient brightness: OLED screens have relatively low brightness, which may make it difficult to see the screen content clearly in sunlight.



**2. LCD screen**



LCD screen, also known as liquid crystal display screen, is a type of screen that requires a backlight source. LCD screens have the advantages of low cost, high brightness, long lifespan, and also have good performance in color reproduction and contrast. However, LCD screens also have some drawbacks, such as relatively slow response speed and smaller viewing angles.

The working principle of LCD screens is to control the transmittance of light by utilizing the orientation changes of liquid crystal molecules under the action of an electric field. When an electric field acts on liquid crystal molecules, they undergo orientation changes, thereby altering the transmittance of light and achieving image display. The backlight source of LCD screens usually uses LED or CCFL (cold cathode fluorescent lamp), which can provide uniform brightness distribution.

The advantages of LCD screens include:

-Low cost: The production cost of LCD screens is relatively low, so the price is also relatively cheap.

-High brightness: LCD screens have relatively high brightness, and the screen content can be seen clearly in sunlight.

-Long lifespan: LCD screens have a relatively long lifespan and are less prone to screen burn-in.

The disadvantages of LCD screens include:

-Relatively slow response speed: LCD screens have a relatively slow response speed and may experience ghosting when displaying dynamic images.

-Small viewing angle: LCD screens have a relatively small viewing angle, and when viewed from different angles, the color and contrast of the image will change.

-Relatively low contrast: LCD screens have relatively low contrast and cannot display very deep black and bright colors.



**3. AMOLED screen**



AMOLED screen, also known as active matrix organic light-emitting diode screen, is a self luminous screen similar to OLED screen. AMOLED screens have the advantages of fast response speed, high contrast, vivid colors, and can also be made very thin, making them very popular in mobile phone design. However, AMOLED screens also have some drawbacks, such as relatively short lifespan and susceptibility to screen burn-in.

The working principle of AMOLED screens is to utilize the characteristic of organic materials emitting light under the action of current. When current passes through organic materials, the materials emit light, thereby achieving image display. Each pixel of an AMOLED screen emits light independently, allowing for high contrast and high saturation color display. Meanwhile, AMOLED screens also have the advantages of fast response speed and low power consumption, making them very suitable for displaying dynamic images and videos.

The advantages of AMOLED screens include:

-Fast response speed: AMOLED screens have a very fast response speed, reaching microsecond level, making them very smooth when displaying dynamic images.

-High contrast: AMOLED screens have a very high contrast ratio, reaching 100000:1 or more, allowing them to display very deep black and vibrant colors.

-Wide viewing angle: AMOLED screens have a very wide viewing angle, reaching over 180 degrees, so the color and contrast of the image will not change when viewed from different angles.

-Thin and light: AMOLED screens can be made very thin, making them very suitable for portable devices such as smartphones.

The drawbacks of AMOLED screens include:

-Relatively short lifespan: The organic materials of AMOLED screens have a relatively short lifespan and are prone to screen burn-in, which means that when the same image is displayed for a long time, traces will be left on the screen.

-High cost: The production cost of AMOLED screens is relatively high, so the price is also relatively expensive.

-Insufficient brightness: The brightness of AMOLED screens is relatively low, and it may be difficult to see the screen content clearly in sunlight.



**4. TFT screen**



TFT screen, also known as thin-film transistor screen, is a type of screen that requires a backlight source. TFT screens have the advantages of fast response speed, high brightness, high contrast, and also have good performance in terms of viewing angle. However, TFT screens also have some drawbacks, such as inaccurate color reproduction and smaller viewing angles.

The working principle of TFT screen is to use thin film transistors (TFT) to control the brightness of each pixel. TFT is a semiconductor device that can control the brightness of pixels by changing the current. When current passes through TFT, TFT controls the brightness of pixels, thereby achieving image display. The backlight source of TFT screens usually uses LED or CCFL (cold cathode fluorescent lamp), which can provide uniform brightness distribution.

The advantages of TFT screens include:

-Fast response speed: TFT screens have a very fast response speed, reaching the millisecond level, making them very smooth when displaying dynamic images.

-High brightness: The TFT screen has relatively high brightness, and the screen content can also be seen clearly in sunlight.

-High contrast: TFT screens have relatively high contrast and can display very deep black and bright colors.

-Wide viewing angle: TFT screens have a relatively wide viewing angle, reaching over 160 degrees, so the color and contrast of the image will not change when viewed from different angles.

The disadvantages of TFT screens include:

-Color reproduction is not accurate enough: The color reproduction of TFT screens is not accurate enough, which may result in color cast.

-High power consumption: TFT screens have relatively high power consumption, which can affect the battery life of the phone.

-High cost: The production cost of TFT screens is relatively high, so the price is also relatively expensive.

Comparison of Three Packaging Technologies


1. COG (Chip On Glass): This is one of the most traditional packaging methods, with low technical barriers and low costs, and is the most commonly used technology for screens. From the English version, it can also be seen that this packaging method involves placing IC chips and FPC cables on the back glass of the screen. However, due to the IC chip being located directly below the LCD, a considerable amount of screen space is squeezed, inevitably resulting in a "chin".




2. COF (Chip On Film): Essentially, it is an upgraded version of COG and a key factor in the current screen transformation. The main principle is to place the display driver IC chip into a flexible FPC cable, and then fold it under the screen using the characteristics of the FPC itself. Specifically, through hot pressing, the Gold Bump of the IC chip and the Inner Lead on the flexible substrate circuit will be bonded together. Due to the release of space occupied by IC chips, the lower frame width can generally be reduced by at least 1.5 millimeters.






3. COP (Chip On Pi): It belongs to the process with the most reduced borders, but it should be emphasized that the premise of this process is the application of flexible OLED screens, which utilize the bending characteristics of flexible OLEDs to bend all cables and ICs below the screen. Of course, OLED is also divided into two types: hard screens and flexible screens. To use this technology, a combination of COP packaging technology and flexible OLED must be used. However, this technology still has the disadvantages of high cost and low yield rate.





After introducing the technical foundations of COG, COF, and COP, let's take a look at the practical application of COP technology on Samsung S8. This phone adopts innovative COP screen packaging technology, which allows the screen edges to bend without physical limitations, achieving a nearly borderless visual effect. This technology not only enhances the aesthetic appearance of mobile phones, but also brings them a wider display space.

The performance of the Chinese market is particularly outstanding. Starting from 2023, the Chinese market will surpass other markets and become the world's largest foldable screen mobile phone market. IDC predicts that in the next five years, the proportion of the Chinese market in the global foldable screen mobile phone market will remain stable at over 40%.

Specifically, in the first half of this year, the shipment volume of foldable screen smartphones in the Chinese market reached 4.98 million units, a year-on-year increase of 12.6%. Among them, Huawei's performance is particularly prominent, occupying 75% of the Chinese market share with a record high of 3.74 million units.

Specifically, in the first quarter of 2025, Huawei shipped 2.84 million units, accounting for approximately 76.6% of the market share; Following closely behind are brands such as Honor and OPPO, but far behind Huawei. Although there was a slight decline in the second quarter, Huawei still maintained its dominant position with a market share of 72.6%.

IDC pointed out that Chinese manufacturers are generally leading the global popularization of foldable screen technology by relying on mature local supply chains, high user acceptance, and precise market strategies. Huawei not only successfully boosted sales, but also promoted the localization of materials and core components in the industrial chain, further enhancing China's independent and controllable capabilities in this field.

Of course, the most significant feeling for consumers is that the current foldable screen prices are becoming increasingly affordable. In fact, this is also the result of the continuous expansion of the market and the continuous decline of supply chain costs. And more affordable prices can further drive market growth, thereby driving down the prices of foldable phones and gradually replacing conventional phones. So the question is, have you used a foldable phone yet?