Light emitting device for AC power operation

  • US 8,716,946 B2
  • Filed: 10/20/2010
  • Issued: 05/06/2014
  • Est. Priority Date: 06/28/2005
  • Status: Active Grant
First Claim
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1. A light emitting device, comprising:

  • a light emitting cell array configured to receive an input voltage and comprising a plurality of light emitting cells connected in series on a substrate,the plurality of light emitting cells to emit light in response to the input voltage, the input voltage to periodically change during a period and to have a first voltage value, which does not turn on the plurality of light emitting cells, after a first peak value,wherein the light emitting device emits light comprising a periodically changing luminous intensity in response to the input voltage, the periodically changing luminous intensity of the light emitting device has a second peak value and a minimum value, the minimum value of the periodically changing luminous intensity is greater than zero when the input voltage has the first voltage value, andwherein each light emitting cell comprises an inclined side surface.

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