LED Lamp Replicates Warm And Cozy Incandescent LightingPosted: May 11, 2013 | Author: flash | Filed under: LED | Tags: Incandescent, Lighting | Comments Off
Radu Surdeanu, the chief scientist at NXP Semiconductors said at the Electronica, that several people are dissatisfied with the light emitted from the LED lighting products including lamps and bulbs, when compared with the incandescent light bulbs. This is particularly true in the case of the dimming LED bulbs.
The incandescent bulbs tend to become warmer when the bulbs are dimmed, and this mainly implies that the color of the light changes when the incandescent bulb gets dim.
As this is not the case with LED bulbs, the NXP researchers replicate these color changes and the main idea behind these alterations is to provide to the customers the same kind of lighting experience as they are used to with the incandescent.
Sensorless sensing for LED lighting?
NXP researchers have developed a solution for this, and the solution is based on “sensorless sensing” technology. When you dim an LED bulb or lamp using this innovative technology, the light appears to be cozier and warmer.
Developed as well as patented by NXP, this solution not only influences the light but it also drives down the LED system price by removing any exterior temperature sensors, thus decreasing the size of the heat sinks that are normally required by the LED lighting products for cooling and improving the reliability.
LED mimics incandescent lights?
Surdeanu further explained how the new technology developed by NXP helps in mimicking the incandescent light when it dims. First of all, the company creates a combination of amber and white LEDs to develop colors that look pleasant to the eye, and this follows the black-body radiation curve. After that the system implements a logarithmic correction for the eye-sensitivity.
Finally, the system also makes use of a sensorless sensing technology in order to determine the LED junction temperature directly, which gives real-time and accurate temperature correction. This is essential to ensure a reliable control of LED performance under diverse conditions.
Today any homes use the compact fluorescents as a replacement for the incandescent, however the most common complaint that the homeowners have is the fact that the fluorescents take a longer warm-up period, until they attain their full brightness. The LED bulbs that mimic incandescent lights’ dimming quality is a great improvement on this; and as more house owners turn to LED lighting, the quality of light as well as life will improve.