Examples of LED chips are GaN, InGaN, {HEAD ~ AlInGaP}, GaP, or {TAIL ~ any device} capable of performing the stated function of emitting light in response to an electrical signal 
Examples of LED chips are GaN , InGaN , { HEAD ~ AlInGaP } , GaP , or { TAIL ~ any device } capable of performing the stated function of emitting light in response to an electrical signal
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