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Polarizing organic photovoltaics

Polarizing organic photovoltaics (ZOPV) is a concept for harvesting energy from Liquid crystal display screens, developed by engineers from UCLA. This concept enables devices to use external light and the LCD screen's backlight using photovoltaic polarizers. Photovoltaic polarizers convert this light into electricity which can be used to power the device. This concept also provides multifunctional capability to devices with LCD screens as they act as photovoltaic devices and as polarisers.

Background

Main article: Liquid crystal display

A liquid crystal display (LCD) is a flat panel display, electronic visual display, video display that uses the light modulating properties of liquid crystals (LCs). LCs do not emit light directly. They are used in a wide range of applications, including computer monitors, television, instrument panels, laptops tablet computers etc. They are common in consumer devices such as video players, gaming devices, clocks, watches, calculators, and telephones.

Operation

Up to three-fourths of the light energy wasted from LCD backlight illumination can be retrieved and used using polarizing organic photovoltaics. They can use external light energy also apart from backlight illumination using photovoltaic polarizers, which are present within the structure of the LCD screen.

Advantages

80% to 90% of the total energy used by any device with an LCD screen is used up by the backlight illumination.

Disadvantages

This simply incorporates additional conversion efficiency losses. These devices harvest their own light. The article cited above, "Photovoltaics Could Charge A Phone Using Its Own Backlight" is bogus and makes claims that would violate the 1st and 2nd laws of thermodynamics if true. Such a device thus could not be patented and commercialized. See also: Perpetual Motion Machine

References

References

  1. (9 August 2011). "Polarizing Organic Photovoltaics". Advanced Materials.
  2. "Phone losing charge? Technology created by UCLA engineers allows LCDs to recycle energy". [[University of California, Los Angeles]].
  3. Matthew Chin. "Phone losing charge? Technology created by UCLA engineers allows LCDs to recycle energy". engineer.ucla.edu.
  4. "Photovoltaic LCDs let phones charge themselves". rdmag.com.
  5. (June 2021). "Photovoltaic Cells In LCDs Could Recycle Wasted And Ambient Light". [[The Washington Post]].
  6. "Technology lets LCDs recycle energy". scienceblog.com.
  7. (2011-08-11). "Photovoltaics Could Charge a Phone Using its Own Backlight". [[PC World (magazine).
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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