LEDinozivikanwa seyechina chizvarwa chekuvhenekesa kana kuti green light source. Iine maitiro ekuchengetedza simba, kuchengetedza kwezvakatipoteredza, hupenyu hurefu hwebasa uye huwandu hudiki. Inoshandiswa zvakanyanya munzvimbo dzakasiyana siyana senge chiratidzo, kuratidza, kushongedzwa, backlight, general lighting uye dhorobha husiku chiitiko. Zvinoenderana nemabasa akasiyana, inogona kukamurwa kuita zvikamu zvishanu: kuratidza ruzivo, mwenje wechiratidzo, marambi emotokari, LCD backlight uye general lighting.

ConventionalMwenje we LEDvane zvikanganiso zvakadai sekupenya kusina kukwana, izvo zvinotungamirira kusakwana kwekupinda. Simba remwenje re LED rine zvakanakira kupenya kwakakwana uye hupenyu hurefu hwesevhisi, asi simba re LED rine matambudziko ehunyanzvi akadai sekurongedza. Heino ongororo pfupi yezvinhu zvinokanganisa kuburitsa kwechiedza kwesimba LED packaging.

Packaging zvinhu zvinokanganisa kuburitsa kwechiedza

1. Tekinoroji yekupisa kupisa

Kune iyo light-emitting diode inoumbwa nePN junction, kana iyo yekumberi ichiyerera ichibuda muPN junction, iyo PN junction ine kupisa kurasikirwa. Izvi zvinopisa zvinoratidzwa mumhepo kuburikidza neadhesive, potting material, heat sink, etc. mukuita uku, chikamu chimwe nechimwe chezvinyorwa chine impedance yekupisa kudzivirira kupisa kuyerera, ndiko kuti, kupisa kwekushisa. Kupikiswa kwemafuta ndiko kukosha kwakagadziriswa kwakatemwa nehukuru, chimiro uye zvinhu zvechigadzirwa.

Rega kupisa kwekushisa kwe LED kuve rth (℃ / W) uye simba rekupisa rekupisa rive PD (W). Panguva ino, iyo PN junction tembiricha yakakonzerwa nekurasikirwa kwekupisa kweiyo ikozvino inokwira kusvika:

T(℃)=Rth&TIMEs; PD

PN junction tembiricha:

TJ=TA+Rth&TIMEs; PD

Ipo TA ndiyo tembiricha ye ambient. Kukwira kwejoni tembiricha kunoderedza mukana wePN junction light-emitting recombination, uye kupenya kwe LED kunodzikira. Panguva imwecheteyo, nekuda kwekuwedzera kwekushisa kwekushisa kunokonzerwa nekurasikirwa kwekupisa, kupenya kwe LED hakuchawedzera kuwedzera maererano nezvino, ndiko kuti, inoratidza kupisa kwekushisa. Uye zvakare, nekuwedzera kwekudziya kwejunction, iyo peak wavelength ye luminescence inotsvedza zvakare kune iyo yakareba wave nzira, ingangoita 0.2-0.3nm / ℃. Kune iyo chena LED inowanikwa nekusanganisa YAG phosphor yakaputirwa neblue chip, iyo yebhuruu wavelength inokonzeresa kusawirirana neiyo yekuwedzeredza wavelength yephosphor, kuitira kudzikisa kupenya kwese kwechena LED uye kushandura tembiricha yeruvara rwechiedza chena.

Kune simba re LED, ikozvino kutyaira kunowanzo kupfuura mazana eMa, uye ikozvino density yePN junction yakakura kwazvo, saka kukwira kwekushisa kwePN junction kuri pachena. Pakurongedza uye kushandisa, maitiro ekudzikisa kupisa kwechigadzirwa uye kuita kuti kupisa kunogadzirwa nePN junction kuparare nekukurumidza sezvinobvira hakungogadzirise kuzara kwechigadzirwa uye kugadzirisa kupenya kwechigadzirwa, asi zvakare kunatsiridza kuvimbika uye hupenyu hwebasa hwechigadzirwa. Kuti uderedze kupikisa kwemafuta ezvigadzirwa, kutanga, kusarudzwa kwezvinhu zvekuputira kunonyanya kukosha, kusanganisira kupisa kunyura, kunamatira, nezvimwewo kupikisa kwemafuta ega ega kunofanirwa kuve kwakaderera, ndiko kuti, kunodiwa kuve neakanaka thermal conductivity. . Kechipiri, dhizaini yekugadzira inofanirwa kuve inonzwisisika, iyo yekupisa yekupisa pakati pezvinhu inofanirwa kuramba ichienderana, uye iyo yekupisa conductivity pakati pezvinhu inofanira kunyatsobatanidzwa, kuitira kudzivirira kupisa kwekupisa bhodhoro mugero rekupisa uye kuve nechokwadi chekupisa kubva mukati kusvika kune kunze. Panguva imwecheteyo, zvakakosha kuve nechokwadi kuti kupisa kunopera munguva maererano neyakagadzirirwa gasi yekupisa kupisa.

2. Kusarudzwa kwekuzadza

Zvinoenderana nemutemo werefraction, kana chiedza chiri chiitiko kubva kuchiedza dense yepakati kuenda kuchiedza sparse medium, kana kona yechiitiko inosvika pane imwe kukosha, kureva, yakakura kupfuura kana kuenzana nekona yakakosha, kubuda kwakazara kuchaitika. YeGaN yebhuruu chip, iyo refractive index yeGaN zvinhu ndeye 2.3. Kana chiedza chichibudiswa kubva mukati mekristaro kuenda kumhepo, maererano nemutemo wekuramba, iyo yakakosha angle θ 0 = sin-1 (n2 / n1).

Ipo N2 yakaenzana ne1, kureva, refractive index yemhepo, uye N1 ndiyo refractive index yeGan, kubva kune iyo yakakosha angle inoverengwa θ 0 inenge 25.8 madhigirii. Muchiitiko ichi, chiedza chega chinogona kubudiswa ndicho chiedza mukati memhepo yakasimba yekona ine chiitiko chechiitiko ≤ 25.8 degrees. Zvinonzi yekunze quantum kunyatsoshanda kweGan chip inenge 30% - 40%. Nokudaro, nekuda kwekubatwa kwemukati kwekrisiti yekrisiti, chikamu chechiedza chinogona kubudiswa kunze kwekrisiti iduku zvikuru. Zvinonzi yekunze quantum kunyatsoshanda kweGan chip inenge 30% - 40%. Saizvozvo, mwenje unoburitswa ne chip unofanirwa kuendeswa kunzvimbo kuburikidza nekurongedza zvinhu, uye pesvedzero yechinhu chiri pachiedza chekubvisa mwenje inofanirawo kutariswa.

Naizvozvo, kuitira kuti uvandudze mwenje wekutora mwenje we LED chigadzirwa kurongedza, kukosha kweN2 kunofanirwa kuwedzerwa, kureva kuti, iyo refractive index yezvinhu zvekurongedza inofanira kuwedzerwa kuvandudza kona yakakosha yechigadzirwa, kuitira kuvandudza kurongedza. kupenya kwechigadzirwa. Panguva imwecheteyo, kunyura kwechiedza chemidziyo yekurongedza kunofanira kunge kuri kudiki. Kuti uvandudze chikamu chechiedza chinobuda, chimiro chepakeji chinonyanya kuvharwa kana hemispherical, kuitira kuti kana mwenje uchinge waburitswa kubva kumidziyo yekurongedza kuenda kumhepo, inenge yakatarisana neiyo interface, saka hapana ratidziro yakazara.

3. Reflection processing

Pane zvinhu zviviri zvakakosha zvekuratidzira kugadzirisa: imwe ndeye kuratidza kugadzirisa mukati meiyo chip, uye imwe yacho kuratidzwa kwechiedza nekurongedza zvinhu. Kuburikidza nemukati nekunze kwekuratidzira kugadzirisa, iyo mwenje flux ratio inoburitswa kubva chip inogona kuvandudzwa, kunyura kwemukati kwechip kunogona kuderedzwa, uye nekupenya kwemagetsi zvigadzirwa zve LED zvinogona kuvandudzwa. Panyaya yekurongedza, iyo simba LED inowanzo unganidza chip simba pane simbi rutsigiro kana substrate ine inoratidzira mhango. Iyo yekutsigira mhando yekuratidzira mhango kazhinji inotora electroplating kuti ivandudze ratidziro, nepo base plate inotaridza mhango inowanzo tora polishing. Kana zvichibvira, kurapwa kwe electroplating kuchaitwa, asi nzira mbiri dzekurapa dziri pamusoro dzinokanganiswa nekurongeka kwe mold uye maitiro, Iyo yakagadziridzwa inoratidzira mhango ine imwe ratidziro mhedzisiro, asi haina kunaka. Parizvino, nekuda kwekusakwana kwekukwenenzverwa kwekukwenenzvera kana oxidation yesimbi yekubatisa, ratidziro ye substrate type reflection cavity yakagadzirwa muChina haina kunaka, izvo zvinoita kuti chiedza chakawanda chipinde mushure mekupfura munzvimbo yekuratidzira uye kusakwanisa kuratidzwa kune chiedza chinobudisa nzvimbo maererano nezvinodiwa zvinotarisirwa, zvichiita kuti chiedza chakaderera chibudise kushanda zvakanaka mushure mekuiswa kwekupedzisira.

4. Phosphor kusarudzwa uye kupfeka

Kune chena simba re LED, kuvandudzwa kwesimba rinopenya rinoenderanawo nekusarudzwa kwephosphor uye maitiro ekurapa. Kuti uvandudze kushanda kwe phosphor excitation ye blue chip, kutanga, kusarudzwa kwephosphor kunofanira kunge kwakakodzera, kusanganisira excitation wavelength, particle size, excitation performance, nezvimwewo, izvo zvinoda kunyatsoongororwa uye kufunga nezvese kushanda. Chechipiri, kupfekedzwa kwephosphor kunofanira kunge kwakafanana, kunyanya kuwanda kweiyo adhesive layer pane imwe neimwe yechiedza-emitting pamusoro pechiedza-emitting chip inofanira kuva yakafanana, kuitira kuti irege kudzivirira chiedza chemunharaunda kuti chibudiswe nekuda kwekusaenzana kwehupamhi, asi. zvakare kuvandudza kunaka kwenzvimbo yechiedza.

muchidimbu

Yakanaka kupisa disipation dhizaini inoita basa rakakosha mukuvandudza kupenya kwemagetsi emagetsi zvigadzirwa zve LED, uye zvakare ndiyo nzvimbo yekuona hupenyu hwesevhisi uye kuvimbika kwezvigadzirwa. Iyo yakanyatsogadzirwa mwenje yekubuditsa chiteshi pano inotarisa pane dhizaini, kusarudzwa kwezvinhu uye maitiro ekurapwa kweanoratidzira mhango uye yekuzadza glue, iyo inogona zvinobudirira kuvandudza mwenje kuburitsa kushanda kwesimba re LED. Zvesimbachena LED, kusarudzwa kwephosphor uye dhizaini dhizaini zvakare yakakosha kwazvo kuvandudza nzvimbo uye inopenya kushanda.