OLED, the two most popular screen materials, is re

2022-09-19
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As the two major mainstream screen materials, does OLED really crush LEDs in an all-round way

utilization and development of non-metallic materials in automobiles (Liu Qiang, chief engineer of Zhejiang Jixiang Automobile Research Institute Co., Ltd.)

this article is exclusively released by Tencent digital

whether you want to buy a new TV or pay attention to the TV field, you must have heard of OLED TV. OLED TVs are thin and light, and can provide top-level contrast. The effect on the market is second to none

in the field of consumer electronics, OLED technology is no longer a new concept. Since 2001, OLED technology displays have been used in products in the field. Now, LG has begun to popularize OLED display technology in the television field, so consumers are interested in OLED products again. Although the difference between OLED and LED is only one letter "O", the difference between them is not just one letter. But although OLED TV is newer than led, it does not mean that led tv is useless

when OLED TV made its debut in 2013, the outside world praised its perfect black level and excellent color restoration. However, because the brightness cannot be compared with led/lcd TV, OLED TV still did not form a comprehensive suppression of LED TV. In addition, there is also a huge price gap between OLED TV (not to be confused with qled) and high-end led/lcd TV. But now everything has changed. The brightness of OLED TV is much brighter than before, and the price begins to decline as the technology matures. Now, let's look at the differences between these two TV technologies and discuss their advantages and disadvantages

what is led?

the full name of LED is led. These small semiconductor diodes can convert electric energy into light energy. At present, LED is widely used in the field of lighting because of its relatively small and compact volume, and its brightness is very high, and the lighting effect is very good

however, compared with TV, the volume of LED is still not small enough, so at present, LED is only used as the background light source of LCD TV, and each LED can only illuminate a small pile of pixels. Therefore, a new display technology called micro LED may soon change all this

what is OLED?

the full name of OLED is organic light emitting diode. In short, OLEDs emit light and conserve electricity through organic compounds. In addition, OLEDs can be made very thin, flexible, and even curled up.. Compared with LED, each pixel of OLED TV can emit light independently, so it can be turned off selectively, which is why OLED can bring an all black background

at present, LG is the only OLED TV panel manufacturer. At the same time, Sony and LG signed an agreement to allow Sony to use the OLED panel produced by LG on Sony TV. Including our familiar a9f and z9f Master Series TVs are amazing products. In addition, you basically won't see any OLED large-size TVs from other manufacturers on the market. Of course, although Samsung is also producing OLED panels, most of them are currently used in intelligence. Although there are rumors that Samsung may produce OLED TVs, this Korean electronics giant is vigorously promoting its own qled and new microled technology, so this seems unlikely

The performance difference between LG OLED TV and Sony OLED TV is mainly caused by the use of different image processors. Samsung, Sony and LG all have impressive image processors, and the processors of each manufacturer are unique, which is why two TVs with the same panel look very different. A good image processor can greatly reduce the problems of picture stripes and noise, and also make the generated color more accurate

oled and led/lcd who is better

in the past, OLED TVs performed better than led/lcd TVs in almost all fields. However, due to the recent emergence of quantum dot technology and the improvement of backlight function, the performance of led/lcd TVs themselves has doubled and doubled compared with a few years ago. Now led/lcd TVs have better black performance, and greatly improve the color effect and reduce light leakage. Therefore, the difference between OLED and led/lcd TV equipped with quantum dot technology is not so big. In addition, our comparison is not limited to image quality, so we can compare OLED and led/lcd through different aspects. Of course, since OLED itself is a more high-end technology, the LEDs we compare are also those high-end models with great potential

black level

the ability of the screen to display dark color is the most important parameter in the performance of image quality. Higher black level can bring higher contrast and richer colors. Therefore, it will also make the overall picture quality present a more "dazzling" effect. When we mentioned the black level, OLED undoubtedly had a dominant position and became the undisputed winner

because the LCD backplane of LED TV uses the principle of backlighting, even with more advanced dimming technology, local reduction of the brightness of LED backlight can improve the black level of LED TV. However, although the progress is obvious and the backlight effect is minimized, there is still a certain gap compared with OLED. However, it is worth noting that the q9f qled TV launched by Samsung in 2018 is a major breakthrough in the performance of LED TV, which has almost eliminated all these problems in black rating, so q9f has also become an exception to the rule

oled TV can turn off the light-emitting function of pixel points without generating any light source, so it can basically show complete black. Therefore, the outcome is obvious in this link

win: OLED

brightness

when comparing brightness, LED TV has considerable advantages. LED technology has now become very intelligent, so coupled with the addition of quantum dot technology, LED TV has achieved the ultimate in brightness. Although OLED TV is also very "bright", there is no problem in black level and contrast, if the brightness of OLED TV is adjusted to the maximum, it will not only reduce the service life of pixels, but also need a certain period of transition to return to black again

considering these factors, we generally know that OLEDs, led/lcd or other technologies on the market can produce sufficient brightness. Then we will consider the specific use environment. If you are in a dark room, the effect of OLED TV is better, while LED TV is more suitable for a bright environment, because the relative brightness of LED is higher

it is worth noting that Sony launched some OLED TVs with very high brightness in 2018, and LG's latest OLED TVs are also very bright, which are suitable for viewing under almost any circumstances, with direct sunlight on the screen. However, if compared directly, LEDs still have considerable advantages in brightness

win: LED

color gamut

although OLED has inherent advantages in this aspect, it can cultivate 2-3 leading enterprises in the country, but led quantum dot technology can improve the purity of backlight, so that the picture can reach the same level as OLED in color accuracy, color quantity and brightness. But those who are looking for wide color gamut and HDR effect will find that OLED and led support these functions, and the contrast of OLED is better, so HDR will have a slight advantage when watching in dark environment, but HDR on advanced led/lcd screen has an advantage, because it can produce saturation under extreme brightness that OLED cannot fully match

at present, most high-end UHD TVs are excellent in color performance, and there is still greater potential in the future

win: draw

response time and delay, but there are still limitations. Late

response time refers to the time spent by each diode from "on" to "off". Faster response time results in less motion blur and less consumption

oled material is simpler than led/lcd TV in response time because its smaller diode works as a single pixel. In contrast, the diodes in LED TVs are not only relatively slow, but also located behind the LCD screen, and are powered by the entire pixel cluster rather than a single pixel cluster. This will cause the overall change between the "on" and "off" states to slow down. In fact, OLED currently provides the fastest response time of all TV technologies currently used, and it is clearly a winner in this regard

as for input delay, LG has improved OLED TVs in this regard, but we are still unable to test the effect of other competitors' OLED TVs. We know that from the perspective of delay, OLED TV is not a bad choice for game players, but it remains to be seen which specific input delay time is the shortest. Because the input delay of different models of led/lcd TVs is very different, it is difficult to rank OLED and led/lcd TVs. So we just need to say that OLED is a better choice for players

win: OLED

visual angle

OLED once again became a winner. Although the visual angle of the IPS display produced by LG has been greatly improved compared with that of the traditional VA LCD, it is still unable to compare with the OLED panel. When using LED screen, the best viewing angle is 0 degree front. When you move to any side, the color and contrast of the image will be reduced. Although the degree is different between different models, this effect does exist. LG also has an LCD panel called IPS in LED technology. The visual angle of this panel is slightly better than that of VA LCD panel. However, compared with VA panel, IPS panel has inherent shortcomings in black performance, so it is not a competitor of OLED in this regard. Samsung's most expensive qled TV adopts the latest panel design and anti reflective coating, which greatly reduces the problem of angle shift. Although OLEDs still have the best viewing angle, the gap between the two is rapidly narrowing

that is, the OLED screen can be viewed at a maximum angle of 84 degrees without reducing the brightness. Therefore, compared with most led TVs, this is an obvious advantage of OLED. Most led TVs have been tested, and the maximum acceptable viewing angle is 54 degrees

win: OLED

panel size

LG has just launched a 77 inch OLED TV, which is a huge leap compared with the previous 65 inches. However, led/lcd has more space in panel size. 85 to 90 inch TVs have many different products on the market, and even some manufacturers have launched 120 inch led/lcd TVs. Therefore, in the limit size of the display panel, the winner this time is led/lcd

win: led

service life

lg said that its OLED TVs can be used for 54 years under 50% brightness for 5 hours a day. At present, it is impossible to verify whether such a commitment is true. After all, it has been less than three years since the advent of OLED TV. However, at present, in terms of service life, the more traditional led/lcd TV seems to be more reliable

win: led

screen aging

perhaps here, the word screen aging seems a little too serious. For most ordinary consumers, they basically won't face this problem

we

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