VGA: onjani ikhebula, umshayeli, a ihluzo adaptha?

Iningi lanamuhla abasebenzisi computer, idivayisi yeselula noma ithelevishini panel ebhekene eside ezifana VGA. Kuyini - esokhethini, isiqophi ikhadi, ukwengamela, umshayeli, ikhebula noma i-adaptha? Ngeshwa, abaningi bethu babe nokuqonda okucacile lo mbuzo, njengoba umthetho, akukho. Ngakho-ke kuyadingeka ukuba bahlale kule ejwayelekile kabanzi.

VGA: ukuthi kuyini ngomqondo ovamile?

Okokuqala, amazwi ambalwa mayelana ejwayelekile. Ngomqondo ebanzi VGA ingathathwa eceleni yezingxenye engenhla, njengenhlangano ebalulekile ingxenye isiqophi esibonakalayo uhlobo, ekuqaleni lakhiwa IBM amakhompyutha abo.

Ngakho, ekuqondeni ukudluliselwa kwezobuchwepheshe noma ukudlala isithombe afakiwe futhi 'nensimbi' futhi izingxenye software, kanye esibonakalayo obusayo ekusebenzelaneni kwabo.

Indaba le ejwayelekile

Manje amagama ambalwa mayelana nokubonakala VGA isiqophi ejwayelekile. Ayini amandla layo, a kuncane okwaziwayo ngaso. Ngokokuqala ngqá ubuchwepheshe Isiqophi Graphic Array laqanjwa IBM ngo-1987 kuya ku-PS / 2 amakhompyutha.

VGA ukuphuma adaptha, ngokungafani kuya ababengaphambi zabo futhi abalandela, ngokuba eliphezulu isithombe ukudluliswa esetshenziswa (futhi isebenzisa) isiginali ye-analog. Kodwa endleleni kukhona umbuzo kanjani, kungani wathatha ukwethulwa indinganiso entsha. Ukuze ukuqonde ngokwengeziwe lesi sinqumo kudingeka ubheke nemingcele eziyisisekelo amadivaysi ngokwabo.

Izici Key

Esokuqala futhi esinye sezici eyinhloko kwathatha le ndinganiso, ochwepheshe abaningi ngokuthi iphuzu lokuthi ekuqaleni kwakudingeka ukunciphisa inani izintambo kuleli ikhebula main kungaba exhunywe ohlelweni amayunithi nge-VGA ihluzo adaptha ukuze ngabaqaphi ezifanele, abakwazi ukuba kudlule imibala okuningi futhi shades kuka ngaphambili. Lapho lokhu kufinyelelwa, kanye nesinqumo isithombe ephakeme.

I-adaptha ihluzo VGA manje has a isakhiwo ebandakanya izinto ezilandelayo:

• ihluzo isilawuli ukushintshanisa idatha phakathi CPU kanye inkumbulo isiqophi esekelwe imisebenzi idatha kancane;
• Dram isiqophi inkumbulo 256 kb, ihlukaniswe umbala ungqimba ezine;
• serializer VRAM idatha ibhithi yokudlulisela isilawuli izingxenye;
• attribute isilawuli yokuguqula idatha yokufaka ku namanani wombala esekelwe Iphalethi;
• synchronizer ekushintsheni ukulawula izingqimba kanye nemingcele nesikhathi ikhadi ihluzo;
• Isilawuli cathode-ray tube odala amasignali ukuvumelanisa umshini.

Kuncike ekutheni uhlelo has VGA-umshayeli eshiya isinqumo esiphezulu pixel angu-640x480 intshi ngayinye kanye angafika ku-32 izingcezu ukujula umbala. Yiqiniso, ngesikhathi ukubukeka okujwayelekile, kwaba ngempela ukuvukela uMbuso. Kodwa namuhla ungathola isixazululo kakhulu kunalokhu ukuthi ibangelwa ngokusebenzisa ubuchwepheshe digital. Kodwa njengoba kuvela, ngisho nakuleli qophelo, ayikwazi ehlisiwe VGA esezingeni imishini computer. Kusho ukuthini? Yebo, kodwa lokho yokudlulisela isithombe, njengoba sekuphawuliwe kakade, isignali analog ukuthi zingaphendulwa zibe yizindawo yokuhlanganela iyiphi enye. Ngaphezu kwalokho, ubukhulu adaptha is kakhulu ziyancipha, futhi kungenziwa ihlanganiswe ngokuqondile umbadlana, noma ngaphezu ikhadi vidiyo.

Lapha kubalulekile ukuba sinake futhi yokuthi ukuthi isiginali digital has a-bandwidth ububanzi, futhi ukudluliswa isiginali enjalo isebenzisa MPEG wekhodi ubuchwepheshe. Futhi lokhu, esikhundleni salokho, kuholela ekulahlekelweni izinga.

VGA-ebuyako TV

Kusukela kwaqala ukusetshenziswa okujwayelekile eziyisisekelo zaqala ukusetshenziswa ngenkuthalo, futhi ngabaqaphi abafanele, nangemva - ne-TV panel esibonakalayo (isib kudivayisi LCD).

Namuhla le isifinyezo selisho bonke ihluzo kwimodi futhi qapha, kuhlanganise abakwaziyo ukusekela isinqumo 640x480 pixels, kungakhathaliseki ukuthi ingxenye hardware. Ngesikhathi sigaba samanje nentuthuko, kungukuthi esetshenziswa cishe, nakuba ngesinye isikhathi yayithandwa kakhulu.

ihluzo

Cishe zonke yesimanje ihluzo accelerators (ihluzo ikhadi), kungakhathaliseki ukuthi kuhlanganiswa noma ngokuqhubekayo ukwesekwa tindlela eziyisisekelo echazwe esibonakalayo futhi ifakwe okukhiphayo esihambisanayo (izimbobo), okuyinto ngezinye izikhathi kubhekiselwa kuzo futhi njengoba D-Sub.

Ngamanye amazwi, ikhadi ividiyo ingase ibe ambalwa isiqophi okukhiphayo. Futhi VGA-isixhumi likhona njalo saziso. Phela, kungenziwa lezi nezixhumi ezitholakele ku-panel esemuva fixed base amayunithi futhi ohlangothini izindonga laptops.

abashayeli

Nakanjani ukuba ngingehlelwa nangeyodwa kulezi ihluzo namafutha ngeke kusebenze ngaphandle nje umshayeli ezifanele (VGA-umshayeli kuhlanganisiwe) ngaye.

Kodwa ihluzo yesimanje amakhadi ukufaka uhlelo lokulawula esinjalo asisho ukuthi akudingeki kusukela database Amasistimu wokusebenza kwe-Linux kusuka abakhiqizi hardware. Ngaphezu kwalokho, namuhla kabanzi amathuluzi ukuphathwa, noma ukusheshisa wanakekela NVIDIA futhi Radeon amakhadi ethandwa kakhulu.

Iqiniso ukuthi VGA-umshayeli isebenza kahle, abadlali abaningi ungenza kulungiselelwa ku izilungiselelo umdlalo 640x480 isiqophi imodi noma ukuhlukahluka angajwayelekile. Empeleni, isimo esifanayo singabonakala lapho yokuxhuma ikhompyutha noma ikhompyutha ephathekayo flat-panel ephezulu definition uma usebenzisa VGA-ikhebula (hhayi kuphela uhlobo olufanayo isixhumi nhlangothi zombili).

Izinhlobo izintambo futhi adapters

Kusukela ongakhetha uxhumano ividiyo interface ezahlukene ngokuphelele zingatholakala impela eningi, kuwufanele wedwa stop phezu izintambo nge adapters engasetshenziswa ukuguqula uhlelo isithombe ukudluliswa okuzokwenziwa balibona futhi balamukela, futhi Transmitter.

Njengoba isibonelo, masicabange ngomhlangano VGA-ikhebula nezinhlobo ezahlukene ukuhwebelana. Phakathi ukhiye (ngaphandle uhlobo ezivamile) ungabahlukanisa:

• VGA-DVI (esetshenziswa kwamanye amakhadi ividiyo ungenalo isixhumi VGA Nokho, futhi silondoloze ezifanele yokusebenza izindlela);
• VGA--HDMI (kungasetshenziswa ukuxhuma amakhompyutha amadala noma laptop namathelevishini yesimanje namaphrojektha);
• VGA-RCA noma VGA- «Tulip" (esetshenziselwa uxhumano zanamuhla tangcondvomshini, hhayi eline nezixhumi VGA, TV ubudala noma zigade nge CRT CRT);
• VGA--HDMI RCA-mini-Jack (ukushintshashintsha ngokuhlanganisa odlule adapters ezimbili ngokuqondene ukudluliswa umsindo - nge-VGA umsindo idluliselwa);
• VGA-S-Isiqophi (ngaphansi yafuna yokuxhuma kuma-TV).

Uhlelo oluyisisekelo oluthi ejwayelekile isixhumi, okhethwe namanje njengoba DE15F, kunoma yiziphi embodiments kuyinto isixhumi 15-pin kulolu hlangothi, angadlulisela isignali esekelwe ibhanqanisiwe ukuskena ubuchwepheshe, lapho ushintsho voltage oluhambisana ushintsho CRT ukugqama (qapha isibhamu ugongolo umfutho noma kinescope).

kafushane lokho futhi kufinyelelwe iziphetho ezinembile

Yilokho konke kuza ukuqonda VGA. Kuyini lokhu? Empeleni, kuba esibonakalayo, kunokuba izingxenye zalo ngabanye kunesidingo ukuze kusebenze lesifanele. Futhi kwenzeka kanjani ukuthi ukuqaphela, kuba khona kunoma Computing amadivayisi zamanje. Nakuba amathemba ukuthuthukiswa kwazo ubuchwepheshe Ubonakala ezingacacile kakhulu, kodwa kuze kube manje kuzo ukunikeza akekho ohambayo.

Kumele wanezela ukuthi le ndinganiso, naphezu ukubukeka abalandeli bakhe ngesimo esibonakalayo efanayo Super VGA noma XGA, namanje uhlala omunye ethandwa kakhulu futhi kwafunwa emhlabeni wonke futhi kuzo zonke izinhlobo amadivaysi, kuhlanganise PC, laptops, panel TV, noma ngisho mobile zobuchwepheshe.