A newly developed light shutter may pave the way for see-through displays and smart windows
The secret desire of urban daydreamers staring out their office windows at the sad brick walls of the building opposite them may soon be answered thanks to transparent light shutters developed by a group of researchers at Pusan National University in South Korea.
A novel liquid crystal technology allows displays to flip between transparent and opaque states — hypothetically letting you switch your view in less than a millisecond from urban decay to the Chesapeake Bay. Their work appears this week in the journal AIP Advances, from AIP Publishing.
The idea of transparent displays has been around for a few years, but actually creating them from conventional organic light-emitting diodes has proven difficult.
“The transparent part is continuously open to the background,” said Tae-Hoon Yoon, the group’s primary investigator. “As a result, they exhibit poor visibility.”
Light shutters, which use liquid crystals that can be switched between transparent and opaque states by scattering or absorbing the incident light, are one proposed solution to these obstacles, but they come with their own set of problems.
While they do increase the visibility of the displays, light shutters based on scattering can’t provide black color, and light shutters based on absorption can’t completely block the background. They aren’t particularly energy-efficient either, requiring a continuous flow of power in order to maintain their transparent ‘window’ state when not in use. As a final nail in the coffin, they suffer from a frustrating response time to power on and off.
Tae-Hoon Yoon’s group’s new design remedies all of these problems by using scattering and absorption simultaneously. To do this, Yoon’s group fabricated polymer-networked liquid crystals cells doped with dichroic dyes.
In their design, the polymer network structure scatters incident, or oncoming light, which is then absorbed by the dichroic dyes. The light shutters use a parallel pattern of electrodes located above and below the vertically aligned liquid crystals.
When an electric field is applied through the electrodes, the axes of the dye molecules are aligned with that of oncoming light, allowing them to absorb and scatter it. This effectively negates the light coming at the screen from its backside, rendering the display opaque – and the screen’s images fully visible.
“The incident light is absorbed, but we can still see through the background with reduced light intensity,” Yoon said.
In its resting state, this setup lets light pass through, so power need only be applied when you want to switch from transparent window view to opaque monitor view. And because the display’s on-off switch is an electric field, it has a response time of less than one millisecond – far faster than that of contemporary light shutters, which rely on the slow relaxation of liquid crystals for their off-switch.
Read more: Windows That Act Like an LCD Screen
The Latest on: Smart windows
via Google News
The Latest on: Smart windows
- Europe Smart Jewelry Market is slated to grow rapidly in the coming yearson April 8, 2020 at 6:54 am
Major Product Types covered are:, Android, IOS, Windows Phone, Compatible Systems Major Applications of Smart Jewelry covered are:, Health and Movement, Device Control, Communication To get this ...
- Why Microsoft should postpone Windows 10's next feature upgrade, 2004on April 8, 2020 at 3:04 am
Microsoft may have the next Windows 10 upgrade burning a hole in its pocket, but if it's smart, the Redmond, Wash. developer will keep that code to itself for now. In fact, software developers could ...
- OneDrive rolling out File hover card, Smart upload management, etc.on April 7, 2020 at 10:55 am
Users with Windows 10 or Windows Server 2016 or later can make use of Microsoft OneDrive Smart upload management to automatically adjust sync client upload rates, depending on the availability of ...
- Global Smart Windows Materials Revenue, Gross Margin and Market Share (2020-2025)on April 6, 2020 at 10:56 pm
Global Smart Windows Materials Market Overview The latest report on the global Smart Windows Materials market suggests a positive growth rate in the coming years Analysts have studied the historical ...
- 5 Smart Home Tricks That Are Actually Impressiveon April 6, 2020 at 3:25 pm
It’s not difficult to do either—all you need is the free Philips Hue Sync app for Windows or macOS. That is the one caveat about this setup: Your videos must be played on a computer (or a computer ...
- Soulver smart calculator app for Mac adds new ‘QuickSoulver’ feature, time zone conversions, moreon April 6, 2020 at 11:17 am
You can access QuickSoulver in the Soulver app itself, or via the menu bar or with a global hotkey. Here’s how the feature works: Perform “throwaway” calculations in a Spotlight-like interface ...
- Smart Windows Market to Garner $8.97 Bn, Globally, by 2026 at 11.4% CAGR, Says Allied Market Researchon April 2, 2020 at 7:37 am
Allied Market Research recently published a report, titled, "Smart Windows Market by Technology (Suspended Particle Device Light Modulator, Polymer Dispersed Liquid Crystal Devices Scanner, and ...
- Smart Windows Market to Garner $8.97 Bn, Globally, by 2026 at 11.4% CAGR, Says Allied Market Researchon April 2, 2020 at 7:32 am
PORTLAND, Oregon, April 2, 2020 /PRNewswire/ -- Allied Market Research recently published a report, titled, "Smart Windows Market by Technology (Suspended Particle Device Light Modulator ...
- The Best Smart Light Bulbs You Can Control From Your Phoneon April 2, 2020 at 2:31 am
Color changing is its standout feature, but TP-Link’s Multicolor Smart Light Bulb has some other distinct advantages over many of the other options in this guide. You can control it using a smartphone ...
- Microsoft’s Chromium Edge is getting Vertical Tabs, Smart Copy, and Password Monitoron March 30, 2020 at 9:30 am
Consumer features like Vertical Tabs, Smart Copy, and Password Monitor are coming soon. Microsoft also shared a few updates for existing or already announced features like Collections, InPrivate mode, ...
via Bing News