Humidity responsive ON/OFF holographic/color-structured display
CREDIT: POSTECH
A magical display that projects holographic images that change when in contact with water has been developed. This new technology increases the possibility of commercialization as it can infinitely imprint holographic images.
A POSTECH research team led by Professor Junsuk Rho (Department of Mechanical Engineering and Department of Chemical Engineering) and Ph.D. candidates Byoungsu Ko, Younghwan Yang, Jaekyung Kim, and Dr. Trevon Badloe has developed a technology for a humidity-responsive display that changes in brightness and color depending on the degree of humidity.
The team first successfully realized holographic images with tunable brightness using polyvinyl alcohol (PVA). This material is so flexible that it is usually used for liquid glue or slime and one of its distinctive properties is that it swells as humidity increases. A holographic image that is clear at a low degree of humidity gradually becomes unclear as humidity increases.
The team additionally developed a display on which structural colors can be discretionally tuned. A blue image at low humidity turns red as humidity increases. If humidity is fine-tuned, all RGB colors may be expressed, in addition to the two colors.
This study also draws attention to the team’s success in using the single-step nanoimprinting technique to print the images. It is notable that images can be vividly expressed even on a flexible substrate. In addition, as a single pixel of this display—which reaches 700 nm (1nm = 1/1 billion m)—is smaller than those of currently commercialized displays, it is anticipated to become the core technology for nanostructured displays.
The findings from the study have received significant attention as the newly developed technology may be employed to security labels for authentication against counterfeits, including food items like whisky, currency bills, or passports. The team has been working with Korea Minting and Security Printing Corporation (KOMSCO) to apply the optics-based future security technology to actual products. Subsequently, this technology is expected to be applied to the development of a hydrogel macromolecule-based display that responds to external stimuli such as heat, acidity (pH), and fine-dust pollution.
These findings on the brightness and color tunability of holographic images were published in the international journals Nature Communications and Advanced Science, respectively.
Original Article: Nanoimprinting technique for humidity-responsive holographic images
More from: Pohang University of Science and Technology
The Latest Updates from Bing News
Go deeper with Bing News on:
Holographic image display
- Did Stanford just prototype the future of AR glasses?
Although the Stanford tech is currently just a prototype, with working models that appear to be attached to a bench and 3D-printed frames, the researchers are looking to disrupt the current spatial ...
- Stanford engineers develop ‘killer app’ of holographic heads-up displays
Researchers from Stanford University have successfully developed an artificial intelligence (AI)- powered holographic imaging augmented reality (AR) headset. While only a prototype at this stage, if ...
- AI and holography bring 3D augmented reality to regular glasses
Researchers in the emerging field of spatial computing have developed a prototype augmented reality headset that uses holographic imaging to overlay full-color, 3D moving images on the lenses of what ...
- I Rode This ‘Holographic’ Bike and Things Got a Little Weird
Saga's HoloBike promises to make stationary bike rides feel more like the real thing. If you're in the market for a non-Peloton, though, this may not be the one.
- Swave Photonics develops true holographic display for spatial computing
Swave Photonics, a "true holographic display" company, announced the world’s first 3D holographic display technology for XR.
Go deeper with Bing News on:
Humidity-responsive display
- I Tried the New iPad Pro's Nano-Texture Anti-Reflective Display
After Apple's “Let Loose” virtual event, I got to spend around 45 minutes with the new iPad Pros, specifically the version with the nano-texture display that reduces reflections and glare. Here are my ...
- Best memorial day sales of 2024 to start your summer with savings
The best Memorial Day sales of 2024 are almost here! We're running down all the best bargains, deals and offers, from TVs and laptops to clothes and skincare.
- Best Smart Thermostats in 2024
What is the best smart thermostat? There are many kinds of smart thermostats with a wide array of features available now. Using a smart thermostat saves you money on your monthly energy bills by ...
- 20 Ways To Lower Humidity In The House
Humidity in the home can create a sticky situation, particularly in the summertime, when your abode should serve as a place to cool off after long days in the sun. Here’s how to reduce the ...
- Staying sunny with low humidity
Take the heat seriously and drink plenty of water if you'll be outdoors, especially this weekend as slightly higher humidity returns. The rainy season begins in just under one month, on May 15.