LCD screens last longer than OLED screens. This is because LCD screens are usually manufactured with more advanced materials and processes to minimise wear and tear and scratches on the screen. OLED screens, on the other hand, usually use multi-layer backlighting technology to ensure that the screen receives even light in any direction, thus extending the life of the screen. While LCD screens may be handled more carefully during the manufacturing process, they typically last longer than OLED screens.

Although this was to prove highly influential to other LCD researchers, Dr Schadt says the use of organic substances in electronics remained an "exotic" idea to others.

FirstLCDmonitor invented

"But such an experimental finding is often the case in physics - you have a vague idea how things should operate and then you find they operate differently."

As a result Roche underestimated the value of its team's discovery and cancelled the project. Dr Schadt switched disciplines and spent the next two years studying biological reactions including the effects of a drug given to chickens.

It also reformed its liquid crystal research division and put Dr Schadt in charge, cutting short his brief stint in medical research. The unit was later spun off as an independent company, Rolic, where Dr Schadt served as chief executive until he retired in 2002.

"So if you have an RGB display the blue colour will age differently from the red and green ones and this will change the colour quality of the display.

The technology uses light from the surrounding environment instead of a backlight to illuminate its liquid crystals. The result resembles a thin e-reader display capable of playing back colour videos.

They filed a patent for the idea in Switzerland on 4 December 1970 and published a paper in the journal Applied Physics Letters, external four days later.

"So when we started looking at alternatives to this effect we wanted a device with low power consumption, which had a low operating voltage and offered much better contrast."

FirstLCDTV

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lcd是什么

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Liquid crystals are unusual. Unlike most substances they can hover in an intermediate state between being a solid and a liquid.

He abandoned the research in favour of liquid crystals, but now LG, Samsung and others are promoting OLED TVs as the superior option.

The difference between an OLED screen and an LCD screen is the difference in colour performance.OLED screens have better colour performance due to the use of organic light-emitting diode (OLED) technology, whereas LCD screens use halogen LED (LCD) technology.The LEDs in OLED screens are able to better reflect the image and produce richer colours. Additionally, OLED screens support higher refresh rates for smoother and more detailed images. Therefore, if you are looking for better colour performance, OLED screens are a better choice!

By placing a layer of liquid crystals between two plastic surfaces coated in a grid of transparent electrodes, and then applying electricity, they discovered they could create individual "pixels" which could be used to draw shapes.

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OLED screens and LCD screens have different contrasts.The pure black part of an OLED screen is whiter than the pure white part, whereas the organic light-emitting diodes of an LCD screen are capable of reaching 10,000, which means that OLED screens have a higher contrast ratio. In addition, the organic light-emitting diode of OLED screen can reach 20,000, while the contrast of LCD screen is only 2,000, which means that the contrast of OLED screen is higher. As a result, OLED screens are more advantageous in terms of display effect and colour reproduction, while LCD screens are more suitable for displaying content in dark light environments.

OLED screens are thinner and lighter compared to LCD screens because they use OLED technology, whereas LCD screens are made of cardboard. In addition, OLED screens are also thicker than LCD screens because of the backlight and liquid crystal layers. This design makes the OLED screen thinner, and also provides the possibility for the emergence of bendable and foldable screens in the future. Therefore, if you are looking for a thinner and lighter screen, an OLED screen is a better choice.

"I just came from a conference in Vancouver where there was a presentation of prototypes by the Japan Display Consortium which showed a beautiful 6in LCD display with a power requirement of only two milliwatts," Dr Schadt says.

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LCDdisplay

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His admirers know him as the "father of the pixel", and this week the European Patent Office gave him its lifetime achievement award, noting that sales of devices featuring LCD panels totalled $120bn (£80bn) in 2012.

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Among the 110 patents registered to Dr Schadt's name, one sticks out: a 1969 document detailing his work on an organic light-emitting diode screen.

They proved that by using electrical jolts the spiral molecular structure of LCD crystals could be "unwound" causing them to block light, and then "re-twisted" so that they became see-through again.

LCDscreen

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LCDProjector

27" Gaming Monitor with WQHD 2560 x 1440 Resolution 144 Hz Refresh Rate and NVIDIA G-Sync 16:9 TN Panel

Although Roche opted not to make LCD screens itself, it realised the invention was too valuable to sell off, and decided to license the technology to Seiko and others.

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The voltage required to achieve this was much lower than expected, meaning the effect could be produced with an ordinary battery.

In the 1960s, researchers at RCA Laboratories in Princeton, New Jersey used the finding to create the first basic LCD screen. It used an electrical charge to make liquid crystals scatter light, causing the display to take on the appearance of a frosted glass window.

"The question has not yet been answered whether OLED will be stable over 50,000 hours to prevent the consumer seeing any deterioration in the appearance of the screen."

Thankfully, the decision proved short-lived and Dr Schadt helped the firm become a major supplier to the screen-making industry, as well as making further contributions to the technology's evolution.

Who inventedLCDprojector

The Japanese company was attracted by the fact the technology only needed a few microwatts of power per square centimetre to function, making it suitable for wrist-worn displays

In 1970 the Swiss physicist achieved a breakthrough that would pave the way for LCD read-outs at first on calculators, watches and alarm clocks, and then flat-panel TVs, laptops and smartphones.

lcd屏幕

But one year later his employer, Roche, thought the feat was a mismatch with its other pharmaceutical-focused efforts and canned the project.

They were first discovered in 1888 by a botanist studying carrots who extracted a compound that appeared to have two melting points. At the first it softened and became milky, at the second it turned transparent.

"It required current flow so power consumption was an issue, the current degraded the electrodes which limited the lifetime of the device, and the voltages required were relatively high," Dr Schadt tells the BBC.

"For example a TV display has to have very fast response times which is not necessary in a watch. Or in an automotive display you need a very broad temperature range... which would not be required in an iPhone, for instance."

But he also wanted to make clear it was too soon to say if the innovation would be eclipsed by rival organic light-emitting diode (OLED) screens.

But one of the key players in LCD's development says the innovation wasn't "highly regarded" in its early years. Martin Schadt isn't exaggerating.