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.

**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.

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.

011. Analysis of Mobile Screen Technology
1.1 Overview of LCD and OLED
LCD relies on external light sources, while OLED can emit light on its own; The two principles are fundamentally different.
1.2 LCD Screen Technology
LCD screen, also known as Liquid Crystal Display, has become a mature technology after a long period of development and is widely used in various types of mobile phone screens. At present, screen technologies such as TFT, IPS, and SLCD can all be classified as LCD screens. Among them, TFT, as a general term for LCD panels, was once the mainstream of early LCD screens. Although its display effect was mediocre, its cost was low, so it was still adopted by many low-end models.IPS screens, often referred to as "SuperTFT" in the industry, are an upgraded form of LCD screens that essentially still belong to the category of TFT screens. Compared to ordinary TFT screens, IPS screens have a more transparent display effect, bright colors, and a wider viewing angle, reportedly even reaching a viewing angle range of nearly 180 °. SLCD, also known as "Super LCD", belongs to a higher level of LCD screen technology, and its excellent display effect and good color reproduction ability have won widespread praise.
1.3 OLED Display Technology
Compared with LCD screens, the biggest feature of OLED screens is the self luminous display technology of pixels, which makes OLED screens more outstanding in display effects and become the mainstream direction of future screen technology development. At present, AMOLED screens dominate the OLED field, and Samsung, as a leader in mastering core technologies, has achieved increasingly accurate color reproduction in its products, with significant improvements in color cast compared to earlier products. Super AMOLED， As an important product of Samsung in the OLED display market, it is widely praised for its high color saturation and vivid display effects, especially in terms of color performance. Samsung's Super AMOLED screen is considered a leader in the industry.
1.4 [Introduction to 120Hz Flow Rate Screen]
Recently, mobile phone manufacturers have launched 120Hz streaming screens, which brings us a brand new visual experience through technological innovation. The flow rate screen, with its high refresh rate of 120Hz, significantly surpasses the refresh rate of traditional 60Hz mobile phone screens. In fact, the refresh rate of 120Hz flow rate screens has been improved, and optimized circuit components have been used to achieve higher screen refresh rates.

In fact, the perception ability of the human eye is often misled. For example, the common 24FPS frame rate in movies, which plays 24 frames per second, sacrifices 1/24 of a second of motion detail despite the use of motion blur technology to make the images appear coherent. This trade-off may be acceptable for movies, but in games, each frame is a static image rendered in real-time. If it is still presented at 24 frames per second, it will result in disjointed actions. The high refresh rate of the flow screen helps to improve the performance of dynamic images, bringing users a smoother visual experience.

Overall, mobile screen technology is developing towards higher refresh rates and better display effects. LCD occupies a place in the market with its mature technology and diversity, while OLED is gradually becoming mainstream with its excellent display effects and self luminous advantages. With the continuous innovation of technology, future mobile phone screens will definitely bring us more surprises and better user experience