Light Power and Light Energy Measurements: The key to clear pictures is Light Energy – the total amount of light that fills a camera’s pixels during image-capture time.On the other hand, Light Power refers to the intensity of a flash.There is also a metronome ticking at 1Hz to show blur due to exposure time 1/10s.
Supercapacitor-powered LEDs: To demonstrate the Brite Flash approach, CAP-XX used a small, thin (20mm x 18mm x 3.8mm thick), dual-cell supercapacitor to drive a two-LED array of Philips LUXEON® PWM4s at 2A each or 4A total during the flash pulse.
The key advantage of LED Flash over Xenon in camera phones is size.
Thinline supercapacitors are available in packages from just 0.6mm thick, fitting easily into space-constrained Io T devices.
CAP-XX supercapacitors benefit from a unique nanotechnology construction that stores electrical charge in engineered carbon electrodes, arranged in multiple layers and connected in parallel to minimize resistance and maximize capacitance.
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Tests again showed that the LED Brite Flash approach delivers more light energy than most xenon flashes in a thin form factor suitable for slim camera phones and digital cameras.
For more details and conclusions, see the press release:
The supercapacitor then stores the energy and delivers the peak power needed to transmit sensor condition data over wireless networks such as IEEE 802.15.4 (Zigbee) and 802.11 (WLAN).
Together they can power wireless sensor nodes indefinitely. Overview: This provides visuals from a 2009 study updating the company’s 2006 study.
To calculate Light Energy: Light Power (Lux) x Flash Exposure Time (Secs) = Light Energy (Lux. The Xenon flash has excellent light power, but a very short flash exposure time.