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Category: mobile phones – Page 2

A high-resolution spectrometer that fits into smartphones

Color, as the way light’s wavelength is perceived by the human eye, goes beyond a simple aesthetic element, containing important scientific information like a substance’s composition or state.

Spectrometers are that analyze by decomposing light into its constituent wavelengths, and they are widely used in various scientific and industrial fields, including material analysis, chemical component detection, and life science research.

Existing high-resolution spectrometers were large and complex, making them difficult for widespread daily use. However, thanks to the ultra-compact, high-resolution spectrometer developed by KAIST researchers, it is now expected that light’s color information can be utilized even within smartphones or wearable devices.

Apple’s Liquid Glass design is paving the way for AR glasses

At Apple’s WWDC 2025 event, the company announced its most dramatic software design change in over a decade: Liquid Glass. This visual overhaul gives us a glimpse into what might be coming in Apple’s rumored AR glasses, which will reportedly debut next year.

Users are connecting Liquid Glass to potential AR glasses because the new design draws strong inspiration from that of Apple’s Vision Pro VR headset.

Liquid Glass is named with the idea that each window on a phone is like a pane of glass, see-through and somewhat reflective. It gives the screen a sleeker look, though in its developer beta, Apple hasn’t quite worked out the kinks of playing with opacity.

Ultrathin display technology shows dozens of images hidden in a single screen

From smartphones and TVs to credit cards, technologies that manipulate light are deeply embedded in our daily lives, many of which are based on holography. However, conventional holographic technologies have faced limitations, particularly in displaying multiple images on a single screen and in maintaining high-resolution image quality.

Recently, a research team led by Professor Junsuk Rho at POSTECH (Pohang University of Science and Technology) has developed a groundbreaking metasurface technology that can display up to 36 high-resolution images on a surface thinner than a human hair. This research has been published in Advanced Science.

This achievement is driven by a special nanostructure known as a metasurface. Hundreds of times thinner than a human hair, the metasurface is capable of precisely manipulating light as it passes through. The team fabricated nanometer-scale pillars using silicon nitride, a material known for its robustness and excellent optical transparency. These pillars, referred to as meta-atoms, allow for fine control of light on the metasurface.

Turning trash into treasure: How microwaves are revolutionizing e-waste recycling

You may not have heard of tantalum, but chances are you’re holding some right now. It’s an essential component in our cell phones and laptops, and currently, there’s no effective substitute. Even if you plan to recycle your devices after they die, the tantalum inside is likely to end up in a landfill or shipped overseas, being lost forever.

As a researcher focused on critical materials recovery, I’ve spent years digging through , not seeing it as garbage, but as an urban mine filled with valuable materials like .

Apple under pressure to shine after AI stumble

Pressure is on Apple to show it hasn’t lost its magic despite broken promises to ramp up iPhones with generative artificial intelligence (GenAI) as rivals race ahead with the technology.

Apple will showcase plans for its coveted devices and the software powering them at its annual Worldwide Developers Conference (WWDC) kicking off Monday in Silicon Valley.

The event comes a year after the tech titan said a suite of AI features it dubbed “Apple Intelligence” was heading for iPhones, including an improvement of its much criticized Siri voice assistant.

Old smartphones can have a new life as tiny data centers

Researchers at the University of Tartu Institute of Computer Science introduce a novel approach to reducing electronic waste and advancing sustainable data processing: turning old smartphones into tiny data centers.

Each year, more than 1.2 billion smartphones are produced globally. The production of electronic devices is not only energy-intensive but also consumes valuable natural resources. Additionally, the manufacturing and delivery processes release a significant amount of CO₂ into the atmosphere. Meanwhile, devices are aging faster than ever—users replace their still-functional phones on average every 2 to 3 years. At best, old devices are recycled; at worst, they end up in landfills.

Although the most sustainable solution would be to change and consider more carefully whether every new model truly requires replacing the old one, this is easier said than done. Rapid technological development quickly renders older devices obsolete. Therefore, alternative solutions are needed—such as extending the lifespan of devices by giving them an entirely new purpose.

New quantum battery design promises nanoscale energy storage

In the coming years, batteries so tiny yet powerful could revolutionize everything from smartphones to supercomputers.

Energy storage is about to take a massive leap forward, with the new concept of “topological quantum battery” at the forefront.

A theoretical study by researchers at the RIKEN Center for Quantum Computing and Huazhong University of Science and Technology has shown how to efficiently design a quantum battery.

Ultra-thin lenses halve incident wavelength to make infrared light visible

Physicists at ETH Zurich have developed a lens that can transform infrared light into visible light by halving the wavelength of incident light. The study is published in Advanced Materials.

Lenses are the most widely used optical devices. Camera lenses or objectives, for example, produce a sharp photo or video by directing at a focal point. The speed of evolution in the field of optics in recent decades is exemplified by the transformation of conventional bulky cameras into today’s compact smartphone cameras.

Even high-performance smartphone cameras still require a stack of lenses that often account for the thickest part of the phone. This size constraint is an inherent feature of classic design—a thick lens is crucial for bending light to capture a sharp image on the camera sensor.

This VR Game Developed by Japanese Scientists Could Improve Your Eyesight

With smartphones, game consoles and computers, it’s easy to rack up screen time these days. Of course, this isn’t great for your eyes, as anyone who has suffered an eyestrain hangover after spending hours gaming or doomscrolling knows. Staring at screens all the time tires out the ciliary muscles in your eyes that are responsible for focusing on objects, which can cause you to become near-sighted. However, the answer to improving your vision could be… more gaming?

In a recent study, researchers at Kwansei Gakuin University in Japan developed a VR game that aims to improve players’ eyesight. Although more research is needed, this game could potentially be used to help people with simple myopia (near-sightedness) bolster their vision.

It’s a relatively simple target shooting game developed in Unity for Meta Quest 2. The game features three lanes, each with a circular target on a stick. Pressing down the trigger button on the controller activates a virtual laser beam. Pointing this laser towards a lane highlights the lane and target and puts the player into “aim” mode. But to successfully hit the target, players have to move the controller’s stick in the direction indicated by the small Landolt C (a black ring shape with a gap used in Japanese eye tests) in the middle of the target.

Pupil dilation directly linked to the brain’s “working memory” levels

A fresh study suggests that the way a person’s pupils change while they concentrate hints at how well that mental scratchpad is working.

Working memory does more than hold stray reminders; it stitches together phone digits until they are dialed, keeps track of a spoken sentence until the meaning lands, and buffers half-finished ideas during problem-solving.

Unlike long-term memory, it works on a tight clock measured in seconds. Because the capacity is finite – typically three to seven items at once – small differences in efficiency can ripple through reading, mathematics, and decision-making.