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Wearable Devices to be Fitted with Tiny Micro Supercapacitor

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A tiny micro supercapacitor (MSC) has been developed with a small width as that of a person’s fingerprint that can directly be integrated with an electronic chip. It has attracted great attention like a novel technology leading the Internet of Things (IoT) era as it can be independently driven if applied to separate electronic components.

Professor Sang-Young Lee, In the study and his School of Energy and Chemical Engineering research team at UNIST, has revealed a new class of ultrahigh areal number density solid-state MSCs (UHD SS-MSCs) on a chip through electrohydrodynamic (EHD) jet printing. From the research team, it’s the first study in MSCs to utilize EHD jet printing.

A supercapacitor (SC), referred to as ultracapacitor, could store far more energy than ordinary capacitors. The merits of supercapacitors include longer cycle life and high power delivery compared to lithium-based secondary batteries. It could be particularly produced as tiny as your fingerprint’s width through the semiconductor process. Thus it can be applied for the Internet of Things (IoT) and wearables devices.

However, the manufacturing process produces heat that could deteriorate the supercapacitor’s electrical characteristics. It’s therefore been hard to connect them to electronic components directly. The fabrication method combining supercapacitors with electronic components through inkjet printing techniques may, besides, have disadvantages of low precision.

Researchers addressed the issue using EHD jet printing, a great-resolution patterning technique in microelectronics. EHD jet printing operates using electrolyte and electrode to print the same as those of conventional inkjet printing. It can however control printed liquid using an electric field.

‘’We were able to produce up to 54.9 unit cells per square centimeter (square cm) via electro-hydrodynamic jet printing technique, and thus the output of 65.9 volts (V) was achieved in the same area,’’ says Kwonhyung Lee (Combined M. S/Ph.D. of Energy and Chemical Engineering, UNIST), the initial author of the study.

The team also succeeded in fabricating on a chip 36 unit cells (area = 8.0 mm * 8.2 mm, 54.9 cells square cm) and an operating voltage (65.9 V square cm) that lie away beyond the previously reported MSCs under printing techniques fabrication. More so, when exposed to high temperature (80 degrees C), the cells retained normal cyclic voltammetry (CV) profiles. This proves that it can withstand excessive heat produced during actual electronic component operation. Additionally, the batteries could offer customized power supplies since they could be connected in parallel or series.

“In this study, we have demonstrated on-chip UHD SS-MSCs fabricated via EHD jet printing,’’ says Professor Lee. ‘’The on-chip UHD SS-MSCs presented here hold great promise as a new platform technology for miniaturized monolithic power sources with customized design and tunable electrochemical properties.”

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Exploring the Pinnacle of Television Technology: A Deep Dive into the Best TV Brands of 2023

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In the ever-evolving world of consumer electronics, televisions remain a central piece of technology in most households. As we step into 2023, the quest for the best TV brand continues, with consumers seeking a blend of innovation, quality, and value. This article delves into the latest offerings from top TV brands, highlighting their unique features and technological advancements.

LG: A Leader in OLED Technology

LG G2 OLED TV

  • Pros:
    • Exceptional HDR peak brightness.
    • 120 Hz refresh rate and VRR support enhance gaming experience.
    • Impressive black levels suitable for movie nights.
  • Cons:
    • Strong ABL in bright environments.
    • Purple tints caused by bright light reflections.
    • Poor upscaling of 480p content.
  • Verdict: The LG G2 stands out in lit rooms due to its peak brightness of 590.54 nits. Its HDMI 2.1 support is ideal for modern consoles, and the WebOS software offers a user-friendly experience. However, its anti-reflective coating and processor’s upscaling capabilities could be improved.

LG G2 OLED TV on Amazon

Sony: Balancing Performance and Aesthetics

Sony A90J OLED TV

  • Pros:
    • Near-perfect black levels.
    • Accurate visuals at wide viewing angles.
    • Impressive contrast and color gamut.
  • Cons:
    • Potential for burn-in.
    • Brightness could be better compared to LCD/LED TVs.
    • Lacks VRR until a firmware update.
  • Verdict: The Sony A90J is a solid choice for both gaming and movies, offering crisp 4K resolution and a smooth 120Hz refresh rate. Its peak brightness and burn-in potential are minor drawbacks.

Sony A90J OLED TV on Amazon

Samsung: Innovating with QD-OLED Technology

Samsung S90C TV

  • Pros:
    • Near-infinite contrast ratio for perfect blacks.
    • Peak brightness of 2,000 nits suitable for bright rooms.
    • Wide viewing angle and low input lag/response time.
  • Cons:
    • Aggressive Auto Brightness Limiter (ABL).
    • No support for DTS or Dolby Vision.
  • Verdict: The Samsung S90C excels with its OLED panel, offering perfect blacks and bright highlights. Its QD-OLED technology produces vibrant colors, but the aggressive ABL can be distracting.

Samsung S90C TV on Amazon

Hisense: Affordable Quality

Hisense U8G

  • Pros:
    • Low input lag and fantastic color and brightness.
    • Supports Dolby Vision.
    • Good Google Assistant integration.
  • Cons:
    • Poor viewing angles.
    • Subpar built-in audio.
    • Overzealous motion smoothing.
  • Verdict: A great option for gamers, the Hisense U8G offers excellent contrast and color handling. However, its viewing angles and audio quality leave room for improvement.

Hisense U8G on Amazon

TCL: Balancing Performance and Price

TCL 5 Series QLED TV

  • Pros:
    • Deep blacks with local dimming.
    • Fast response times and low input lag.
  • Cons:
    • Low peak brightness for HDR content.
    • No VRR technology or HDMI 2.1 support.
  • Verdict: Ideal for casual gamers, the TCL 5 Series offers great color handling and HDR performance. Its lack of VRR and HDMI 2.1 support are notable limitations.

TCL 5 Series QLED TV on Amazon

Vizio: Striking a Balance

Vizio M-Series Quantum X TV

  • Pros:
    • Above-average peak brightness for its price.
    • HDMI 2.1 inputs and Wi-Fi 6E.
    • 120Hz native refresh rate with VRR support.
  • Cons:
    • Not as bright as mini LED models.
    • Only 30 local dimming zones.
    • Narrow viewing angles.
  • Verdict: The Vizio M-Series Quantum X offers a respectable peak brightness and a good contrast ratio. Its performance is balanced, making it a solid choice for those on a budget.

Vizio M-Series Quantum X TV on Amazon

What to Look for in the Best TV Brands

When selecting a TV, consider the following:

  1. Image Quality: Look for strong image quality, which can be subjective based on personal preference.
  2. Display Technology: Understand the differences between OLED, LED, LCD, and QLED.
  3. Display Resolution: Choose between HD and Ultra HD (4K), with 4K being the future of display resolution.
  4. Refresh Rate and Audio Quality: Don’t rely solely on refresh rate marketing ploys and consider external audio solutions for better sound quality.

Conclusion

The best TV for you depends on your specific needs and preferences. Whether it’s the immersive experience of an OLED TV from LG or Sony, the innovative QD-OLED technology from Samsung, the affordability of Hisense and TCL, or the balanced performance of Vizio, there’s a TV out there that fits your lifestyle and budget. Remember, the best TV is one that meets your viewing habits, offers the features you need, and falls within your budget.

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The Ultimate Guide to Transforming Your Living Space with the Latest Intelligent Devices

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The smart home market is burgeoning with devices for every nook and cranny of your living space, and we’ve sifted through the plethora to bring you the crème de la crème, as tested and verified by the tech connoisseurs at PCMag.

Front Yard: The Vanguard of Your Smart Home

The journey into the smart home begins before you even cross the threshold. Take the Arlo Pro 4 Spotlight Camera, a sentinel in the world of outdoor security cameras. This device is not just a watchful eye but also a beacon, literally shining a light on any nocturnal activities with its integrated spotlight. Its wireless design ensures a hassle-free setup, and its compatibility with a myriad of smart home ecosystems makes it a versatile choice.

For those who prefer a warm welcome or a deterrent for uninvited guests, the Ezviz DB1C Wi-Fi Video Doorbell is a budget-friendly sentinel that lets you see, hear, and speak with whoever is at your door, all from the comfort of your smartphone.

And let’s not forget the Ultraloq U-Bolt Pro Wi-Fi, a smart lock that’s as much about brains as it is about brawn, offering multiple entry modes including fingerprint and voice commands.

Living Room: The Heart of Smart Home Comfort

Moving into the living room, the ambiance is king. The Amazon Echo Studio stands tall as a smart speaker that not only serenades you with high-fidelity music but also controls your smart home devices with the sound of your voice.

For those who prefer visual interaction, the Google Nest Hub Max smart display is a window into your digital world, allowing you to manage your home, make video calls, and even follow along with recipes in real-time.

And for a touch of ambiance, the Wyze Bulb Color offers a spectrum of colors to match your mood, all controllable with a simple voice command or a tap on your smartphone.

Kitchen: Where Smart Meets Savory

In the kitchen, the Echo Show 8 reigns supreme, providing not just a portal to your favorite recipes but also a hub for your smart home devices.

For the culinary enthusiast, the Anova Precision Oven is a marvel, allowing you to bake, roast, and steam with the precision of a professional chef.

And when the feast is over, the Shark IQ Robot Self-Empty XL takes the stage, a robotic vacuum that not only cleans but also empties itself, a true modern-day luxury.

Bedroom: Sanctuary of Smart Serenity

In the realm of rest, the Sleep Number 360 i8 Smart Bed offers a bespoke sleeping experience, adjusting firmness to your liking and providing insights into your sleep patterns.

For those who prefer a cooler climate, the Midea 8,000BTU U-shaped Air Conditioner offers a whisper-quiet operation and smart connectivity for those sweltering summer nights.

Bathroom: The Pinnacle of Personal Care

Even the bathroom gets a touch of tech with devices like the Simplehuman Sensor Mirror Hi-Fi, which not only simulates natural sunlight for perfect makeup application but also plays your favorite tunes to get you into the groove of the day.

In conclusion, the smart home ecosystem is rich and varied, with devices that cater to every need and whim. From the vigilant eyes of security cameras to the dulcet tones of smart speakers, the future of home automation is not just about convenience; it’s about crafting a living space that’s responsive, intuitive, and ultimately, a reflection of the people who dwell within.

As we continue to embrace these intelligent companions into our homes, it’s clear that the smart home is no longer a fringe fantasy but a tangible, transformative reality. Whether you’re a tech aficionado or a newcomer to the digital domicile, there’s never been a better time to explore the possibilities that lie at the intersection of comfort, convenience, and cutting-edge technology.

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The Coolpad COOL 20+: A Budget Smartphone Worth Your Attention?

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In a market flooded with budget smartphones, it’s easy to overlook new entrants. However, Coolpad, a relatively new brand in the Philippines, is making waves with its COOL 20+ model. Priced at just PHP 5,699, this phone aims to offer a decent package without breaking the bank. But how does it stack up against its competitors? Let’s dive in.

Design and Construction

  • Aesthetics: The COOL 20+ sports a minimalist design, with a glass back panel that adds a touch of luxury rarely found in this price segment. The metallic flake in the paint makes the phone sparkle under bright lights, giving it a premium feel1.
  • Build: The frame is made of durable plastic, and the phone comes with a rubber case for added protection.
  • Port Placement: The phone features a USB-C port, loudspeakers, a dual-sim card slot that doubles as a microSD slot, and a 3.5mm audio jack.
  • Ergonomics: Weighing 197.1 grams, the phone is on the heavier side and feels a bit bulky.

Display and Multimedia

  • Screen: The phone features a 6.52-inch IPS LCD with relatively thick borders. The colors are decent, and the screen is bright enough for outdoor use.
  • Audio: The downward-firing mono speakers are loud but not the best in terms of quality.

Performance and Benchmarks

  • Chipset: The phone is powered by a MediaTek Helio G85, an older chipset first introduced in 2020.
  • Memory: It comes with 6GB of RAM and 128GB of storage, expandable via a microSD card.
  • Gaming: The phone can handle light gaming but struggles with more graphics-intensive titles.

OS, Apps, and UI

  • Operating System: The phone runs on CoolOS 2, based on Android 11, and doesn’t seem to offer an upgrade to Android 12 or 13.
  • User Interface: The UI is simple and easy to use but lacks flair.

Cameras

  • Rear Camera: The dual rear camera setup features a 48MP main lens and a 0.3MP sensor. It performs well in well-lit conditions and even in low-light scenarios.
  • Front Camera: The 5MP front camera is average but gets the job done in good lighting conditions.

Battery and Connectivity

  • Battery Life: The 4500mAh battery lasted 14 hours in the PCMark battery test.
  • Connectivity: Basic features like Wi-Fi 5, Bluetooth 5.0, and GPS are available.

Conclusion

The Coolpad COOL 20+ offers a decent package for its price. While it does have its shortcomings, such as an older chipset and limited OS upgrades, it makes up for it with a good camera and a premium glass back panel. If you’re willing to overlook these limitations, the COOL 20+ could be a budget smartphone worth considering.

So, is the Coolpad COOL 20+ the budget smartphone for you? With a plethora of options available, the choice ultimately boils down to what you prioritize in a phone. But if you’re willing to try something new, the COOL 20+ might just be the phone to break the monotony.

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