Better cell phone battery life? Recapture wasted LCD backlighting

Better cell phone battery life? Recapture wasted LCD backlightingResearchers have combined photovoltaics with LCD screens in a way that could help bolster the battery life of cell phones, UCLA announced Tuesday. By equipping the phones' LCD displays with photovoltaic polarizers, researchers found they could harvest not only the LCD's extra backlight energy, but also ambient light and sunlight.

Normal LCDs have two polarized sheets with liquid crystal molecules between them that let variable amounts of light pass through, depending on what's being displayed on the screen. Light that is blocked or filtered out is effectively wasted energy that can be harvested.

With the new energy harvesters, called polarizing organic photovoltaics, installed in the LCDs, screens could start giving back to the energy stores they greedily deplete all day. A device's backlight consumes 80 to 90 percent of the device's power, the researchers said, and as much as 75 percent of that is lost to the polarizers; if the polarizers were photovoltaic, much of that energy could be recovered. And not only could the LCDs recoup some of their own waste, they could also harvest ambient light and direct sunlight.

The authors don't specify whether the energy-harvesting LCDs use CCFLs or LEDs for backlighting, but since LEDs consume less power in general, results with them would likely be less dramatic. The paper is due for publication in Advanced Materials next month.

Source: Ars Technica

Tags: mobile phones, technologies

Comments
Add comment

Your name:
Sign in with:
or
Your comment:


Enter code:

E-mail (not required)
E-mail will not be disclosed to the third party


Last news

 
The new mobile payment app offers simple checkout proces
 
It is also rumored to feature a larger 4.2-inch display
 
Will warn users when background apps access the camera
 
Windows Phone 8.1 and 10 users have been spared for now
 
The drive also includes a hefty 40GB of DDR4
 
The bug also affects Safari and the built-in Messages app on macOS and the Apple Watch
 
Now is a good time to check out other keyboards that the Android and iOS app stores have to offer
 
Old installer pulled, new version pointing to the Store
The Samsung Galaxy A5 (2017) Review
The evolution of the successful smartphone, now with a waterproof body and USB Type-C
February 7, 2017 /
Samsung Galaxy TabPro S - a tablet with the Windows-keyboard
The first Windows-tablet with the 12-inch display Super AMOLED
June 7, 2016 /
Keyboards for iOS
Ten iOS keyboards review
July 18, 2015 /
Samsung E1200 Mobile Phone Review
A cheap phone with a good screen
March 8, 2015 / 4
Creative Sound Blaster Z sound card review
Good sound for those who are not satisfied with the onboard solution
September 25, 2014 / 2
Samsung Galaxy Gear: Smartwatch at High Price
The first smartwatch from Samsung - almost a smartphone with a small body
December 19, 2013 /
 
 

News Archive

 
 
SuMoTuWeThFrSa
    123
45678910
11121314151617
18192021222324
25262728   




Poll

Do you use microSD card with your phone?
or leave your own version in comments (6)