Advantages of organic light-emitting diode screen display
1, the thickness can be less than one millimeter, and the weight is lighter.
2, solid mechanism, no liquid matter, so the seismic performance is better, not afraid of falling.
3. There is almost no problem of viewing angle. Even when viewed from a large viewing angle, the picture is still undistorted.
4. The response time is one thousandth of that of LCD, and there will never be smear when displaying moving pictures.
5. It has good low temperature characteristics and can still display normally at minus 40 degrees.
6, the manufacturing process is simple and the cost is low; Higher luminous efficiency and lower energy consumption.
7. It can be made on substrates made of different materials and can be made into flexible displays.
Advantages of LCD display
1, high display quality, no flicker and no electromagnetic radiation.
2, the picture effect is good, no deformation, and it is a real flat panel display.
3. The screen size has good expansibility and high definition, which can really achieve the effect of HDTV.
4, digital working mode, more perfect performance of digital image signals.
5. Low power consumption, only110-1/7 of CRT TV set with the same area.
The advantages of OLED over LCD are as follows.
1, organic light-emitting diodes can emit light by themselves, but LCD can't, so organic light-emitting diodes are much brighter than LCD, with greater contrast and richer color effects.
2.LCD needs to be lit by background light, while organic light-emitting diodes are only powered on in units that need to be lit, so the voltage is very low and it is more energy-saving.
3. Organic light-emitting diodes need less materials and the manufacturing process is simple. The mass production cost is 20% less than that of LCD.
4. Organic light-emitting diodes have no limitation on viewing angle, which can generally reach 160 degrees, and their weight is much lighter than LCD.
5. Organic light-emitting diodes can also be bent, and their future application scope and prospects are larger than LCD.
To sum up, the introduction and application of organic light-emitting diode screen is an inevitable result, just like upgrading the technology on the basis of LCD screen, which can better meet the needs of today's society!
As an ordinary consumer, it is usually difficult to clearly feel the difference in color, brightness and contrast between the two. The mobile phone with the new organic light-emitting diode will feel sour and uncomfortable, but it still smells better after use. Why?
1, the screen of organic light-emitting diode has screen flicker hidden danger.
According to different lighting principles, LCD is equipped with special backlight module, and the dimming accuracy of general module is 12bit. Assuming that the maximum brightness is 500 nits, the corresponding dimming accuracy is 500/(2 12) = 0. 12 nits, which is far from meeting the dimming requirements. This is why the LCD is also DC dimmed, but there is no "broken screen" problem. At present, the mainstream high-end LCD screen adopts full default DC dimming, and there is absolutely no strobe.
2. Screen clarity
If we are careful, we will find a problem. Why is the screen of LCD with the same resolution clearer than that of AMOLED? Let's talk about PPI first. Pixels per inch (PPI), also known as pixels per inch, is an index representing the number of pixels per unit area of a printed image or display. It is generally used to measure the fineness of computer monitors, televisions and handheld electronic devices. Generally speaking, the higher the pixel value per inch, the finer the image that can be displayed on the screen (source Wikipedia). The continuous improvement of screen PPI means that the edges of graphics and words displayed on the screen are getting closer and closer to smoothness and fullness, and closer and closer to the texture of printed matter such as newspapers and magazines. In short, the higher the screen PPI, the finer the picture quality.
3. Organic light-emitting diodes have a short life.
3. 1 Burn screen
Whenever we talk about the characteristics of organic light-emitting diode screens, the problem of "screen burning" is a pain point that organic light-emitting diode screens can't avoid anyway. First and foremost, there is no refutation. Manufacturers can only try their best to improve the design and optimize the software, but they can't solve it. Because "screen burning" is a problem in the display principle of organic light-emitting diodes, the diseases brought in the uterus are hopeless.
"Screen burning" is a folk name, and the real official definition is "ghosting", which is a problem caused by the aging of OLED screens. When an organic light-emitting diode screen continuously displays a picture for a long time, these elements will decay ahead of time due to their continuous light emission, reduce the brightness, and finally form a "brand" on the screen.
In order to reduce the impact of "screen burning" on the display experience, everyone should pay special attention when using organic light-emitting diode mobile phones, avoid keeping the screen on for a long time, keep the picture unchanged, try to choose wallpaper with black theme and change it regularly. Android mobile phone navigation keys are also the hardest hit areas, so try to use full-screen gestures.
3.2 Brightness attenuation
Another problem brought by self-luminescence of organic materials is brightness attenuation. Because LCD is illuminated by backlight module, the display brightness decay period of LCD is much longer than that of organic light emitting diode.
4. Good parameters do not necessarily mean good experience.
In recent years, domestic mobile phone suppliers, especially online products, like to show parameters at the press conference, such as 800nit brightness, 90Hz refresh rate, 10W: 1 contrast, HDR 10+ and so on. To be honest, I don't think this is a good way to show products, because good-looking parameters are not exactly equivalent to a good user experience.
As for which is better, my starting point is not to hurt my eyes. At present, there are iphone XR, Glory 20 Pro, Huawei mate20 and other mobile phones using LCD screens. These models are also best-selling models, which shows that consumers' choice of mobile phones now depends not only on the performance of the mobile phone itself, but on choosing a satisfactory mobile phone from multiple angles.
Hello, the following is the difference between LCD and OLED screen I sorted out, I hope it can help you.
What is the difference between LCD, OLED and AMOLED, which are common screen materials on mobile phones?
LCD: It doesn't emit light by itself, so it needs backlight. Advantages: it has been developed for many years, the technology is mature and the price is relatively cheap; As long as the screen is not damaged, there will be no obvious color cast after years of use. Disadvantages: High power consumption.
Organic light-emitting diode: The organic light-emitting diode screen adopts a very thin coating of organic materials and a glass substrate, and these organic materials will emit light when current passes through. Advantages: the OLED screen does not need backlight, and the thickness can be made thinner; The colors are more vivid and clear; Lower power consumption; Disadvantages: easy to cause screen burning; More harmful to the eyes; The process is relatively immature and the production cost needs to be improved.
LCD screen is mature and stable, with long service life. At present, there are two biggest problems of organic light-emitting diodes: stroboscopic eye injury and irreversible screen burning.
Video is the mainstream of 20 19 organic light-emitting diode screen mobile phone, and stroboscopic is serious in low brightness environment.
The above picture shows the problem of screen burning of organic light-emitting diodes, which is inevitable and can only reduce the degree of screen burning. Screen burning refers to the phenomenon that the screen displays static images for a long time, which will leave residual images. Moreover, this afterimage is permanent and cannot be eliminated. For mobile phone users who use OLED screens, in order to reduce the phenomenon of screen burning, it is necessary to avoid the screen from displaying static images for a long time, such as forming the habit of turning off the mobile phone screen and changing the mobile phone wallpaper when not in use.
Based on this, the slogan of LCD will never be a slave. At present, I use Glory 20 PRO instead of LCD screen. Now I use my mobile phone for five or six hours every day, and eye protection is my first consideration.
Both have their advantages and disadvantages. The advantages and disadvantages of organic light-emitting diode screen compared with LCD screen are as follows: advantages 1: thinness. Advantage 2: Bending performance. The structure of OLED screen is different from that of LCD. Organic light-emitting diode screen has good bending performance, while LCD screen has limited bending performance. Advantage 3: High contrast. Because the pure black of the organic light-emitting diode does not emit light, the screen of the organic light-emitting diode is darker, the contrast is higher, and the electricity is saved. Disadvantages 1: insufficient brightness. Generally, the maximum brightness of LCD screen can reach 600 nits, and the maximum brightness of OLED screen is 450 nits, so it is difficult to see the mobile phone clearly under strong light. Disadvantage 2: insufficient life. Because of organic materials and pixel life, AMOLED screen will decay after a period of use. Disadvantage 3: eye injury. The color cast of organic light emitting diodes is serious, and the display is too gorgeous, which will make your eyes tired if you look at it for a long time. If you have different opinions, please comment.
If it is a mobile phone organic light-emitting diode, it will be a good choice, because it should be replaced when there are signs of screen burning in the service cycle of at most five or six years, but it is another matter for the display screen, because under normal circumstances we will use the display screen for a long time, and the advantage of LED not burning the screen is very obvious at this time. Personally, I think the two are similar in eye protection, even if there is no DC dimming, because I won't use low brightness.
In display devices, the technology of screen use is a crucial link, which directly affects people's perception and experience. In the past, liquid crystal screens (LCDs) were mostly used for large screens, such as color TVs, smart tablets, or small screens, such as mobile phones. In recent years, with the development of OLED screen technology, some high-end TVs and flagship mobile phones are gradually equipped with OLED screens. So is it really good to buy a mobile phone with an organic light-emitting diode screen?
Before understanding this problem, let's first understand the principles of LCD screen and organic light-emitting diode and their different advantages and disadvantages, and finally come to the conclusion that "buy a mobile phone with organic light-emitting diode screen?" Conclusion.
Principle of LCD liquid crystal
LCD is a display screen composed of liquid crystals. Liquid crystal is placed between two pieces of conductive glass, including backlight layer and liquid crystal layer. The liquid crystal layer itself cannot emit light, and the backlight layer is composed of light source substances and can emit light. Then the liquid crystal molecules are controlled by two levels of charge, and then the transmission of the light source is controlled to display the final image.
This is the main principle of TFT.LCD, TFT has five different technologies. Because of the different technical costs, the final effect is also good and bad. These five types are a-Si (amorphous silicon), IGZO (indium gallium zinc oxide), LTPS (low temperature polysilicon), HTPS (high temperature polysilicon) and IPS (plane conversion technology).
1, a-Si, amorphous silicon technology is a kind of TFT technology with low cost, poor brightness and low resolution, which is widely used in low-end mobile phones and is gradually being replaced by LTPS technology.
2.IGZO, indium gallium zinc oxide is a thin film transistor technology. Compared with a-Si amorphous silicon technology, it can achieve higher brightness and accuracy, lower power consumption and better touch performance. This technology is useful for Apple's ipad. With the development of new oxide semiconductor materials, this technology can also be collectively called oxide TFT, that is, oxide thin film transistor.
3.LTPS, low-temperature polysilicon technology, is one of the best TFT technologies at present, with high brightness, high resolution, fast reaction speed and high color saturation. Using LTPS technology, peripheral driving circuits can also be made on the glass substrate for system integration, which not only saves space, but also saves the cost of driving ic. LTPS technology is widely used in mobile phones with high-end LCD screens. Due to the high technical maturity, it has gradually penetrated into low-end mobile phones in recent years. However, due to its technological characteristics, it is difficult to control the uniformity when it is used in large-size equipment, so it is not suitable for making large-size display equipment and is suitable for mobile phone products.
4.HTPS high-temperature polysilicon is often used on the chip of LCD projector, but not on LCD screen.
5.IPS, plane conversion technology. It is a kind of LCD panel technology introduced by Hitachi, also known as super TFT. It is a technology based on TFT, and its essence is still a TFT screen, such as IPS-a-Si TFT or IPS-LTPS TFT. The biggest feature of IPS panel is the solid molecular structure and stable performance of hard-screen liquid crystal, which will not distort the soft screen and affect the color. In addition, IPS screen also has the advantages of fast response, large viewing angle and true color.
To sum up, in the above liquid crystal technology, the effect IPS > LTPS > IGZO > A-Si. HTPS is often used for projection. A better flat panel product should be IPS-IGZO TFT, and the best LCD screen on mobile phone should be IPS-LTPS TFT.
Organic light emitting diode principle
Organic light-emitting diode (OLED) is a panel device composed of organic light-emitting diodes, which is also called organic laser display and organic light-emitting semiconductor in Chinese. Self-luminous organic light-emitting diode display material adopts very thin organic material coating and glass substrate, and these organic materials will directly emit light when current passes through. The greater the current, the more light is emitted, so the OLED display does not need backlight.
AMOLED display screen
Actively drive AMOLED. Each pixel of active driving is equipped with low temperature polysilicon thin film transistor (LTPS-TFT) with switching function, and each pixel is equipped with charge storage capacitor, peripheral driving circuit and display array. All systems are integrated on the same glass substrate. AMOLED is different from LCD. LCD is driven by voltage, while OLED is driven by current. AMOLED can selectively adjust each pixel independently. Compared with LCD display technology, AMOLED display technology is not only energy-saving, light and flexible, that is, the screen can be deformed and bent. Due to the self-luminous characteristics, the brightness and display effect of AMOLED are obviously better than that of LCD.
Comparison between organic light-emitting diode screen and liquid crystal display screen
1 price. Due to the maturity of LCD technology and more application products, the price of LCD mobile phones is more dominant regardless of low-end mobile phones or high-end mobile phones. And the products of organic light-emitting diodes are often made in flagship machine, so the price will be slightly higher, which is not dominant.
2. thickness. Organic light emitting diodes are thinner because they lack several layers of materials. Because the backlight structure is omitted, the thickness of the organic light-emitting diode is less than 1 mm, which is only one third of that of the traditional LCD screen. At the same time, due to the characteristics of material composition, organic light-emitting diodes have good seismic performance and are not afraid of falling.
3. Energy consumption. Due to the different light-emitting modes of the panel, under the same black screen, the organic light-emitting diode does not emit light, and the LCD emits black light. In order to display the color effect on LCD, it is necessary to use color filter film, which will cause the overall light effect to drop by more than 67%. In addition, the light valve function of LCD is based on polarized light, resulting in 50% brightness loss. According to some analysts, the utilization rate of backlight brightness of LCD will not exceed 15%, and 85% of energy is wasted. Therefore, organic light-emitting diodes save more electricity than LCD.
4. Fold and bend. Limited by the different display principles of LCD and OLED, OLED screen can be bent, but LCD screen can't.
5. Contrast. Which is black. The most critical thing about LCD is the black performance: because the liquid crystal layer cannot be completely closed, when the LCD displays black, some light will pass through the color layer, so the black color of LCD is actually gray mixed with white and black.
6, burn the screen. Unique phenomenon of organic light-emitting diode screen. Due to the aging of pixels, the screen will leave the residual image of the original display. This happens when the screen is used for about 2-3 years.
7. Degree of eye damage. Liquid crystals are superior to organic light-emitting diodes.
Why did Samsung give up using organic light emitting diodes on the big screen?
AMOLED and Super AMOLED Samsung almost monopolized the share of small-screen mobile phones. We all know that Samsung is the world's largest supplier of small-screen organic light-emitting diode panels, and more than 95% of the small-size organic light-emitting diode panels in the world are produced by Samsung.
Then why did Samsung give up advocating OLED technology on the big screen? The reason is the output of white organic light emitting diodes and RGB organic light emitting diodes. White organic light emitting diode, that is, directly use the small white organic light emitting diode bulb as the pixel light source, and then filter out the color through red, green and blue films. Low technical difficulty, fast mass production, high profit and beautiful appearance, but heavy afterimage, low brightness, high power consumption, short life and poor pixel quality. At present, most of the large-screen OLED markets on the market are TV products with white OLED technology. At present, the only LG brand in the world has the mass production capacity of large-size organic light-emitting diode panels. And RGB organic light-emitting diodes (OLEDs) generate RGB colors by each pixel, and no filter is needed. RGB organic light emitting diodes, organic light is more environmentally friendly, with high pixel color gamut, low power consumption, longer service life, good transparency and high brightness. However, RGB organic light-emitting diodes are used for large-scale large-screen production, which has complicated technology, is difficult to mass-produce and has extremely low yield. There is no good solution for big factories. Therefore, based on a clear understanding of OLED and the more advanced RGB organic light-emitting diodes are only suitable for small-size mobile phone screens, Samsung chose to use organic light-emitting diode screens on mobile phones instead of large screens.
Finally, how about buying a mobile phone with an organic light-emitting diode screen?
We can see that in the process of comparison between OLED screen and LCD screen, OLED has great advantages, such as better contrast, better black performance, wider color gamut, lighter and thinner, flexible and so on. Indeed, according to the increasing share year by year. It is estimated that by 2020, more than half of smartphones will use organic light-emitting diode displays. "Buy organic light-emitting diode screen phone, ok? The answer to this question seems self-evident.
On the other hand, LCD is still the most mature technology in the display screen and the most mainstream choice in the market, with more suitable price and less irritation to the eyes. For example, in March of 20 18, Samsung introduced S9 with the latest AMOLED screen, and in October of 10, Apple released Iphone XR, and 165438+ adopted LCD. Through the actual comparison, it is found that there is really no difference between the two mobile phone screens in actual use. So far, it can be said that Apple, Samsung, Huawei and Xiaomi have used the best means in mobile phone technology, quality control and screen quality. The actual display effect and optimization technology of the screen are excellent, and no defects can be found even in the range that can be distinguished by the naked eye. So when buying a mobile phone, don't stick to new and special terms, don't stick to a trendy function, choose experience, plan budget, consider practicality and suit yourself.
Put aside those technical terms and briefly talk about the gap between the two.
LCD looks "pale" and OLED looks "bright", which is determined by the lighting mode between them. Seeing the dark scene in the eighth season of Friends, OLEDs will feel better.
Organic light-emitting diodes can be bent, so the flagship of all front-mounted 3D mobile phones on the market is organic light-emitting diodes. Actually, it doesn't matter much, just more classy.
Personally, I think that the display effect of LCD is closest to that of OLED, which should be the screen of iPhone XR.
Each has its advantages and disadvantages. No one is absolutely excellent.