Chemical engineers from ETH Zurich have succeeded in generating ultra-pure green light for the first time. The new light-emitting diode will pave the way for visibly improved colour quality in a new generation of ultra-high definition displays for TVs and smartphones.
Chih-Jen Shih is very satisfied with his breakthrough: “To date, no one has succeeded in producing green light as pure as we have,” says the Professor of Chemical Engineering in his laboratory at the Hönggerberg campus. He points at an ultra-slim, bendable light-emitting diode (LED), which displays the three letters “ETH” in a fine hue of bright green.
Shih’s progress is significant, particularly in terms of the next generation of ultra-high resolution displays used for TVs and smartphones. Electronic devices must first be able to produce ultra-pure red, blue and green light in order to enable the next generation of displays to show images that are clearer, sharper, richer in detail and with a more refined range of colours. For the most part, this is already possible for red and blue light; green light, however, has hitherto reached the limits of technology.
This is due mainly to human perception, since the eye is able to distinguish between more intermediary green hues than red or blue ones. “This makes the technical production of ultra-pure green very complex, which creates challenges for us when it comes to developing technology and materials,” says Sudhir Kumar, co-lead author of the report.
Up to 99 percent ultra-pure green
It becomes clear from reference to the Rec.2020 standard just how much progress Shih’s ultra-green light has made in the development of the next generation of displays. The international standard defines the technical requirements for ultra-high resolution (known as “Ultra HD”) displays and provides a framework for further research and development. The requirements also include an improvement in colour quality visible to the naked eye. The standard provides the colour scale that a display can reproduce and therefore a broader range of colour hues.
Ultra-pure green plays a key role in extending the colour range, or gamut. Ultimately, new hues are created through the technical mixture of three base colours: red, blue and green. The purer the base colours, the broader the range of hues a screen can display. Shih’s new LED is in line with 97 to 99 percent of the Rec. 2020 standard. By comparison, the purest colour TV displays currently available on the market cover on average only 73.11 to 77.72 percent; none exceeds 80 percent.
Inexpensive, producible LED technology
Wendelin Stark, ETH Professor of Functional Materials Engineering, along with researchers from South Korea and Taiwan, also contributed to the project results, which have been published in the scientific journal Nano Letters. Shih not only made a breakthrough in terms of the results, but also in the material and method. He and his colleagues have effectively developed an ultra-thin, bendable light-emitting diode able to emit pure green light using simple room-temperature processes. Shih says that this is the second aspect of his breakthrough and is at least equally important, as until now high-temperature processes were required to produce pure light with LED technology. “Because we were able to realise the entire process at room temperature, we’ve opened up opportunities for the simple, low-cost industrial production of ultra-green light-emitting diodes in the future,” says Jakub Jagielski, co-lead author of the report.
Learn more: Green light for ultra-fine display colours
The Latest on: Ultra-high definition displays
[google_news title=”” keyword=”ultra-high definition displays” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]- JVC Releases 4 New D-ILA Home Theater Projectorson May 1, 2024 at 5:00 pm
Users can experience higher definition images through the improved performance of these projectors, achieved through 8K input and display, and the expansion ... Laser light engine Sharper images and ...
- Amazon Has Our Favorite Smart TV on Sale for 33% Off Right Nowon May 1, 2024 at 1:19 pm
This is the lowest price we’ve seen on Amazon for the TCL 75-inch Q6 QLED Smart TV, so if you want to upgrade for less, don’t wait! If you're looking for something a little different, here are some ...
- Samsung ultra-high-definition TVs redefine display entertainmenton April 30, 2024 at 11:35 am
In the ever-evolving landscape of home entertainment, Samsung once again takes the lead with its latest innovation – ultra-high-definition (UHD) TVs. More than just.... ..
- NETA Auto Global Published Snapdragon Ride Flex Cockpit and Vehicle Fusion Platform, Paving the Way for Intelligent Automotive 2.0on April 28, 2024 at 10:23 pm
8K ultra-high-definition displays, and state-of-the-art low-latency sound effects. Furthermore, it meets ASIL-D level functional safety standards, positioning it as a comprehensive top performer.
- Dave Taylor: What’s with all the tech in a modern TV?on April 28, 2024 at 5:37 am
Q: I want to buy a TV for my bedroom but am completely overwhelmed by modern television specs! What are must-have features, and what can I safely ignore?
- Holographic displays offer a glimpse into an immersive futureon April 23, 2024 at 9:23 am
Setting the stage for a new era of immersive displays, researchers are one step closer to mixing the real and virtual worlds in an ordinary pair of eyeglasses using high-definition 3D holographic ...
- LG Display to Mass Produce World's First Gaming OLED Panel With Switchable Refresh Rate and Resolutionon April 22, 2024 at 6:01 pm
LG Display, the world's leading innovator of display technologies, announced today that it has developed the first-ever Gaming OLED panel with a switchable refresh rate and resolution. The company has ...
- The 6 best tablets for Roblox in 2024on April 1, 2024 at 5:00 pm
Samsung’s beautiful AMOLED ultra-high-definition displays running at 120HZ for super-smooth motion and gameplay, and a Qualcomm Snapdragon 8 Gen 2 8-core processor. Do note that the RAM is tied ...
- Best 4K Ultra HD TV: Unlock visual brilliance and smart features with these top 10 modelson December 20, 2023 at 4:07 pm
The 30-watt speakers support high-definition Dolby Digital ... The stunning Ultra HD resolution and wide colour gamut display bring out every detail and colour in all your movies, shows and ...
- Vesa dsc IP Listingon November 23, 2021 at 7:28 pm
Synopsys’ ... Synopsys VESA Display Stream Compression (DSC) Encoder and Decoder IP provides a video compression solution for up to 10K ultra-high-definition displays over HDMI 2.1, MIPI DSI, and VESA ...
via Google News and Bing News