Patent ID: 8648371
Filing Date: 2014-02-11
Classification: G02F,H01L

Abstract:
1. An LED (light emitting diode) unit comprising: an LED comprising: an electrochromic element mounted on the encapsulant of the LED to cover a part of the encapsulant, when the electrochromic element is applied with an electricity, at least one of a transmittance and a color of the electrochormic element being changed, thereby changing an optical characteristic of light output from the LED unit; wherein the electrochromic element is annular and has an opening through a center thereof, the encapsulant having a first area exposed in the opening and a second area covered by the electrochromic element; and wherein when the electrochromic element is applied with the electricity, light emitted from the first area of the encapsulant directly passes through the opening to an outside environment without being changed by the electrochromic element, and light emitted from the second area of the encapsulant passes through the electrochromic element and is changed by the electrochromic element.