Afọ iri ise gara aga, ndị mmadụ aghọtalarị ihe ọmụma bụ isi na ihe ndị semiconductor nwere ike iwepụta ìhè, na diode mbụ dị na ya bụ nke e mepụtara na 1960. LED bụ abbreviation maka Light Emitting Diode. Ọdịdị ya bụ isi bụ ihe electroluminescent semiconductor ihe etinyere na etiti ndu, wee jiri resin epoxy kpuchie ya iji chebe eriri ndị dị n'ime, na-enye LEDs ezigbo nguzogide ujo.
Isi nke ọkụ{0}emitting diode bụ mgbawa nke p{1}}ụdị na n{2}}ụdị semiconductor mejupụtara. N'etiti p{4}}ụdị na n-ụdị semiconductor bụ oyi akwa mgbanwe a na-akpọ ap-n junction. N'ime njikọ PN nke ụfọdụ ihe semiconductor, mgbe a na-agbanye ndị na-ebu obere ihe na-ejikọta ya na ọtụtụ ndị na-ebu, a na-ahapụ ike ahụ n'ụdị ọkụ, si otú ahụ na-agbanwe ike eletrik ozugbo ka ọ bụrụ ike ọkụ. Mgbe a na-etinye voltaji azụ na nkwụsị PN, ndị na-ebu obere obere na-esiri ike ịgbanye, ya mere ọ dịghị ọkụ na-apụta.
Ụdị diode a, nke a na-eji ụkpụrụ nke electroluminescence injection, na-akpọ ọkụ{0}emitting diode, nke a na-akpọkarị ọkụ ọkụ. Mgbe ọ dị na ọnọdụ ọrụ na-aga n'ihu (ntụgharị, a na-etinye voltaji na-aga n'ihu n'ofe ya), dị ka ugbu a na-esi na LED anode gaa na cathode, kristal semiconductor na-ebunye ìhè nke agba dị iche iche site na ultraviolet na infrared, na ike nke ọkụ na-ejikọta na ugbu a.
