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.

LCD Screen Era: Foundation and Brilliance
Technical principles and characteristics
LCD (Liquid Crystal Display) technology is an important milestone in the development of mobile phone screens. Its working principle is based on the electro-optic effect of liquid crystals, which displays images by changing the passage of light through the arrangement of liquid crystal molecules. LCD screens typically consist of a backlight, polarizing film, liquid crystal layer, and color filters. The backlight provides uniform light, the polarizer controls the direction of light passing through, the liquid crystal layer changes the molecular arrangement under the action of an electric field, and the color filter converts the passing light into the three primary colors of red, green, and blue, thereby forming a color image.LCD screens have the advantages of low cost, stable display, high color reproduction, large viewing angle, and relatively low power consumption. In the early mobile phone market, LCD screens became the mainstream screen technology due to their mature technology and wide applicability. For example, TFT-LCD (Thin Film Transistor Liquid Crystal Display) became popular in the early 21st century and gradually became the mainstream display technology for mobile devices, providing users with clear and stable image display.
Market Applications and Limitations
In the era of LCD screens, many well-known mobile phone brands have adopted this technology. The classic models launched by established mobile phone manufacturers such as Nokia and Motorola were mostly equipped with LCD screens, meeting the basic display function needs of users at that time. However, LCD screens also have some shortcomings. Its response speed is relatively slow, and it is prone to dragging and ghosting, which is particularly evident when watching high-speed moving images. In addition, LCD screens require backlight modules to illuminate the screen, resulting in relatively high power consumption, and the black color performance is not pure enough, with low contrast.

The Rise of OLED Screens: Innovation and Breakthrough
Technical principles and advantages
OLED (Organic Light Emitting Diode) screens are a major innovation in mobile phone screen technology. Unlike LCD screens, OLED screens use self luminous technology, where each pixel can independently emit light without the need for a backlight source. The basic structure of OLED screens consists of several thin films, including an anode, a cathode, and an organic material layer located between the two. When current passes through, electrons and holes in the organic material layer combine to produce an excited state. When the excited state returns to the ground state, light is emitted.
OLED screens have many advantages. Firstly, its vibrant colors and high contrast can present more realistic and vivid images. Due to each pixel emitting light independently, it can truly turn off when displaying black, achieving almost infinite contrast. Secondly, OLED screens have faster response times and smoother visual effects, which can effectively reduce ghosting and residual effects. In addition, OLED screens also have the characteristics of being lightweight, bendable, and foldable, providing more possibilities for the appearance design of mobile phones.
Market Development and Trends

With the increasing demand of consumers for the display effect and appearance design of mobile phone screens, OLED screens have gradually become the standard configuration of high-end mobile phones. Apple, Samsung and other mobile phone brands have adopted OLED screens in their flagship models, driving the rapid development of the OLED screen market. According to Omdia's latest OLED Display Panel Market Tracking Report, smartphone AMOLED display panel shipments are expected to continue to grow in 2024, surpassing TFT LCD shipments for the first time. This growth trend is mainly driven by the strong demand for flexible AMOLED displays in the market.
In the OLED screen market, the performance of flexible AMOLED displays is particularly outstanding. Starting from the second half of 2022, Chinese display panel manufacturers have significantly reduced the manufacturing cost of flexible AMOLED panels, driving major smartphone original equipment manufacturers (OEMs) to upgrade mid-range smartphone screens from traditional rigid AMOLED and LTPS TFT LCD panels to flexible AMOLED panels. The trend of replacing this display technology will further accelerate in 2024, increasing the market share of flexible AMOLED from 28% of the total smartphone display panel market in 2022 to 40% in 2024.
Comparative analysis of LCD and OLED screens
Display effect
In terms of display performance, OLED screens have significant advantages. Its color vividness, contrast, and viewing angle are superior to LCD screens. OLED screens can present richer colors and deeper black, making images more realistic and vivid. LCD screens, on the other hand, have relatively weak color saturation and contrast, and their black color performance is not pure enough, making them prone to light leakage when displaying dark scenes.
power consumption
Due to the self luminous technology used in OLED screens, each pixel emits light independently and can be turned off when displaying black, resulting in relatively low power consumption. LCD screens require continuous operation of the backlight module, which requires a certain amount of power to maintain the backlight even when displaying black, resulting in relatively high power consumption. In practical use, phones equipped with OLED screens usually perform better in terms of battery life.
Cost and lifespan
LCD screen technology is mature and the manufacturing cost is relatively low, so it still has a certain competitiveness in the mid to low end mobile phone market. The manufacturing cost of OLED screens is relatively high, resulting in higher prices for smartphones equipped with OLED screens. In addition, the organic materials of OLED screens have a relatively short lifespan and are prone to aging and screen burn-in, which is also a challenge they face.
Application scenarios
LCD screens are suitable for the mid to low end mobile phone market that is cost sensitive and does not require high display performance, as well as certain specific application scenarios that do not require high power consumption. OLED screens are more suitable for the high-end mobile phone market, meeting consumers' pursuit of high-quality display effects and personalized appearance design. At the same time, the bendable and foldable characteristics of OLED screens also provide more possibilities for the design innovation of future mobile phones.


Outlook for Future Mobile Screen Technology
Exploration of Emerging Technologies
In addition to LCD and OLED screen technologies, emerging screen technologies such as Mini LED and Micro LED are also constantly developing. Mini LED achieves higher brightness and more precise light control effect by reducing the size of LED beads; Micro LED, on the other hand, designs the LED structure into a tiny size, achieving higher pixel density and finer image display effects. However, these emerging technologies are still in the early stages of development and face some technical challenges, such as the relatively complex backlight design of Mini LED, which requires precise control of the luminous effect of each LED bead; Micro LED is facing technological challenges such as chip manufacturing and mass transfer.
Combining with cutting-edge technology
In the future, mobile screen technology will be deeply integrated with cutting-edge technologies such as 5G and AI. The high-speed and stable transmission of 5G networks will bring higher resolution and refresh rate content display to mobile phone screens, enhancing users' visual experience. AI technology can achieve intelligent optimization of screen display effects, automatically adjusting parameters such as brightness, color, and contrast of the screen according to different usage scenarios and user needs, providing more personalized display effects.
Flexibility and Diversified Design
As consumers' demands for mobile phone appearance design and portability continue to increase, future mobile phone screens will further achieve flexible design, creating thinner, more durable, and bendable mobile phone screens. New screen forms such as foldable screens and curled screens will continue to emerge, bringing users new ways of use and interactive experiences. At the same time, the design of mobile phone screens will become more diversified to meet the personalized needs of different users.conclusion
The evolution of mobile screen technology from LCD to OLED is a vivid manifestation of continuous technological progress. LCD screens played an important role in the early development of mobile phone screens due to their low cost and stable display, while OLED screens gradually became the mainstream choice for high-end phones due to their bright colors, high contrast, and bendability. In the future, with the continuous emergence of emerging technologies and deep integration with cutting-edge technologies, mobile screen technology will develop towards higher resolution, higher refresh rate, lower power consumption, greater flexibility, and greater diversity. We have reason to believe that future mobile screens will bring us more stunning visual experiences and more convenient ways of human-computer interaction.

The difference between the two



1. Thickness: LCD screens are thick and hard, and cannot be bent; OLED screens can be bent, making them softer and thinner. From a structural perspective, AMOLED thickness can be nearly 30% thinner than LCD.





2. Price: Due to the mature technology of LCD, LCD is cheaper in terms of price.



3. Service life: LCD screens use inorganic materials, while OLED screens use organic materials. OLED screens have a shorter service life than LCD screens.



4. Color expression: LCD emits light through backlight refraction, so when displaying black, there may be light leakage and whitening around the screen, making black more similar to gray. OLED can express colors through self emission, resulting in a more vivid and full display effect, but there is a risk of screen burn-in.

(Representation of Black)



5. Energy consumption: The luminous principle of LCD is that the color filter film will cause a decrease in light efficiency. Some analyses suggest that the utilization rate of LCD for backlight brightness will not exceed 15%, and 85% of energy is wasted. Therefore, OLED is more energy-efficient than LCD.



LCD is never a slave



OLED screens are often referred to as "blind screens" due to the issue of screen flicker. When adjusting screen brightness, OLED screens use PWM dimming, which is commonly understood as turning on and off every second to control brightness. The brightness is adjusted by the proportion of screen on/off time within the interval.



As long as I light up and turn off quickly enough, my brain cannot feel that I am rapidly switching between light and light states. For some people who are sensitive to screen flicker, PWM dimming is particularly unfriendly to their eyes at low brightness, especially at night, which is why some people may feel obvious eye pain and soreness when using their phones at night.



However, many manufacturers later introduced DC modulation to solve the problem of screen flicker, but with it came the problems of screen burn-in and uneven brightness.



LCD enthusiasts are shouting: LCD will never be enslaved, because of the fatal problem of OLED screen flicker.

(Screen flicker display under camera, image sourced from the internet)



future trends



Although OLED has screen flicker issues, in daily use, the human eye cannot clearly perceive it. Only those who are very sensitive to screen flicker will truly feel discomfort.



OLED with greater power than excess has more advantages, such as better contrast, better black performance, wider color gamut, lighter, thinner, bendable, and so on. That's why mainstream flagship phones now choose OLED screens.

In the future, the development trend of mobile phones will also move towards full screen, curved/foldable screens, and under screen fingerprint and under screen cameras, and the position of OLED will not be shaken. LCD screens will be more commonly used in mid to low end smartphones due to their low cost and mature technology.



So, whether to choose LCD screen or OLED screen, Haoge has summarized their respective advantages and disadvantages for everyone. If you are particularly sensitive to screen flicker, it is recommended to choose LCD. In addition, choosing OLED screen can bring a better visual experience.

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.