{"id":20473,"date":"2023-12-14T09:41:41","date_gmt":"2023-12-14T08:41:41","guid":{"rendered":"https:\/\/www.md-elektronik.com\/?p=20473"},"modified":"2023-12-14T09:48:11","modified_gmt":"2023-12-14T08:48:11","slug":"fpd-link","status":"publish","type":"post","link":"https:\/\/www.md-elektronik.com\/cs\/fpd-link\/","title":{"rendered":"FPD-Link"},"content":{"rendered":"\n

Co znamen\u00e1 FPD-Link?<\/strong><\/h2>\n

Term\u00edn \u201eFPD-Link\u201c ozna\u010duje video rozhran\u00ed od spole\u010dnosti Texas Instruments (TI) se s\u00e9riov\u00fdm p\u0159enosem dat ve vozidle. Zkratka \u201eFlat Panel Display Link\u201c tak\u00e9 zna\u010d\u00ed jeho \u010dast\u00e9 pou\u017eit\u00ed v notebooc\u00edch, ploch\u00fdch obrazovk\u00e1ch nebo LCD televizorech. Pomoc\u00ed tohoto rozhran\u00ed \u201epoint-to-point\u201c \u00a0je v\u00fdstup grafick\u00e9ho procesoru p\u0159ipojen k displeji. Paraleln\u00ed linky videosign\u00e1lu jsou ve vys\u00edlac\u00edm \u010dipu serializov\u00e1ny a v p\u0159ij\u00edmac\u00edm \u010dipu op\u011bt deserializov\u00e1ny. Proto se hovo\u0159\u00ed o spojen\u00ed SerDes.<\/p>\n

Kdo jsou v\u00fdrobci t\u011bchto \u010dip\u016f?<\/strong><\/h2>\n

FPD-Link p\u016fvodn\u011b vyvinul v\u00fdrobce \u010dip\u016f National Semiconductors v roce 1996. Tato spole\u010dnost m\u011bla s\u00eddlo v Santa Cla\u0159e v Kalifornii. Na podzim 2011 ji p\u0159evzala spole\u010dnost Texas Instruments. Texas Instruments Incorporated, \u010dasto ozna\u010dovan\u00e1 jako TI, je jednou z nejv\u011bt\u0161\u00edch americk\u00fdch technologick\u00fdch spole\u010dnost\u00ed se s\u00eddlem v texask\u00e9m Dallasu. Evropsk\u00e1 centr\u00e1la skupiny se nach\u00e1z\u00ed v\u00a0bavorsk\u00e9m Freisingu. Spole\u010dnost TI je jedn\u00edm z nejv\u011bt\u0161\u00edch sv\u011btov\u00fdch v\u00fdrobc\u016f polovodi\u010d\u016f. FPD-Link je otev\u0159en\u00fd standard a lze jej pou\u017e\u00edvat bez licence. Jedn\u00edm z n\u011bkolika rozhran\u00ed spolupracuj\u00edc\u00edch s FPD-Link je FlatLink od spole\u010dnosti Texas Instruments.<\/p>\n

Jak\u00e1 jsou pou\u017eit\u00ed ve vozidle?<\/strong><\/h2>\n

Pomoc\u00ed FPD-Link je mo\u017en\u00fd p\u0159enos digit\u00e1ln\u00edho video obsahu s vysok\u00fdm rozli\u0161en\u00edm z jednoho bodu do druh\u00e9ho. To je nutn\u00e9 pro rozhran\u00ed displeje a kamery.<\/p>\n

Jak se FPD-Link dostal do vozidla?<\/strong><\/h2>\n

FPD-Link bylo prvn\u00edm rozs\u00e1hl\u00fdm rozhran\u00edm s protokolem LVDS, kde se d\u00edky diferenci\u00e1ln\u00edmu p\u0159enosu zlep\u0161ila elektromagnetick\u00e1 kompatibilita. U LVDS jsou t\u0159i barevn\u00e9 sign\u00e1ly p\u0159en\u00e1\u0161eny jako t\u0159i diferenci\u00e1ln\u00ed sign\u00e1ly s\u00e9riov\u011b prost\u0159ednictv\u00edm t\u0159\u00ed kroucen\u00fdch p\u00e1r\u016f vodi\u010d\u016f. \u010ctvrt\u00fd p\u00e1r vodi\u010d\u016f p\u0159en\u00e1\u0161\u00ed taktovac\u00ed sign\u00e1l. Pro vy\u0161\u0161\u00ed barevn\u00e1 rozli\u0161en\u00ed lze FPD-Link realizovat tak\u00e9 pomoc\u00ed \u010dty\u0159 p\u00e1r\u016f vodi\u010d\u016f. Dal\u0161\u00ed v\u00fdvoj FPD-Link vedl v roce 2006 k FPD-Link II, kter\u00fd byl vyvinut speci\u00e1ln\u011b pro infotainment v automobilov\u00e9m pr\u016fmyslu, a tak\u00e9 pro digit\u00e1ln\u00ed fotoapar\u00e1ty. V t\u00e9to verzi je hodinov\u00fd sign\u00e1l vlo\u017een do barevn\u00fdch sign\u00e1l\u016f. To znamen\u00e1, \u017ee sign\u00e1l RGB a hodinov\u00fd sign\u00e1l jsou p\u0159en\u00e1\u0161eny jedin\u00fdm kroucen\u00fdm p\u00e1rem vodi\u010d\u016f. Rozhran\u00ed je tak kompaktn\u011bj\u0161\u00ed a jednodu\u0161\u0161\u00ed. D\u00edky v\u00fdvoji vhodn\u00e9ho rozhran\u00ed spole\u010dnost\u00ed Rosenberger se v leto\u0161n\u00edm roce dostala tato verze i do s\u00e9riov\u00e9 v\u00fdroby. V roce 2010 byla p\u0159edstavena t\u0159et\u00ed verze FPD-Link III. Od FPD-Link II se li\u0161\u00ed t\u00edm, \u017ee obousm\u011brn\u00e1 komunikace prob\u00edh\u00e1 p\u0159es stejn\u00fd p\u0159enosov\u00fd kan\u00e1l. P\u0159es toto p\u0159ipojen\u00ed se p\u0159en\u00e1\u0161ej\u00ed \u0159\u00eddic\u00ed sign\u00e1ly. S FPD-Link IV je mo\u017en\u00e9 provozovat dokonce dv\u011b obrazovky 4K UHD.<\/p>\n

Bude se pou\u017e\u00edvat LVDS?<\/strong><\/h2>\n

Dal\u0161\u00ed novinkou je, \u017ee FPD-Link III ji\u017e nepou\u017e\u00edv\u00e1 technologii LVDS a pro s\u00e9riov\u00e9 vysokorychlostn\u00ed sign\u00e1ly pou\u017e\u00edv\u00e1 pouze CML. D\u00edky tomu lze snadno pracovat s rychlost\u00ed p\u0159enosu dat vy\u0161\u0161\u00ed ne\u017e 3 Gbit\/s na kabelech del\u0161\u00edch ne\u017e 10 m. Technologie CML funguje dob\u0159e, kdy\u017e je jeden vodi\u010d v koaxi\u00e1ln\u00edch kabelech opat\u0159en sign\u00e1ly. Proto\u017ee koaxi\u00e1ln\u00ed kabely dok\u00e1\u017e\u00ed velmi dob\u0159e kontrolovat impedanci a \u0161um, sni\u017euj\u00ed pot\u0159ebu diferenci\u00e1ln\u00edch sign\u00e1l\u016f, tak\u017ee nespojitosti impedance a ru\u0161en\u00ed \u0161umem jsou l\u00e9pe tolerov\u00e1ny.<\/p>\n

Je mo\u017en\u00e9 kompenzovat vlivy kabel\u016f?<\/strong><\/h2>\n

FPD-Link III obsahuje v deserializ\u00e9ru integrovan\u00fd adaptivn\u00ed ekvaliz\u00e9r. Vstupn\u00ed sign\u00e1l do deserializ\u00e9ru m\u00e1 obvykle sn\u00ed\u017eenou integritu. To je obvykle d\u016fsledkem ru\u0161en\u00ed (ISI) zp\u016fsoben\u00e9mu ztr\u00e1tami na kabelu. Adaptivn\u00ed ekvaliz\u00e9r dok\u00e1\u017ee rozpoznat \u0161patn\u00fd sign\u00e1l a obnovit p\u016fvodn\u00ed integritu. Tato funkce je u\u017eite\u010dn\u00e1 v jak\u00e9koli aplikaci, kde se kabel m\u016f\u017ee li\u0161it v d\u00e9lce, provozn\u00ed teplot\u011b a vlhkosti, proto\u017ee tyto prom\u011bnn\u00e9 ovliv\u0148uj\u00ed ISI vypl\u00fdvaj\u00edc\u00ed z efektu \u201elow-pass\u201c filtru kabelu.<\/p>\n

To by v\u00e1s tak\u00e9 mohlo zaj\u00edmat<\/h3>A\u00b2B (Automotive Audio Bus)\u00a0<\/a>ADAS<\/a>AMEC<\/a>APIX<\/a>Automotive Ethernet<\/a>Autonomn\u00ed \u0159\u00edzen\u00ed<\/a>C.A.S.E<\/a>FAKRA<\/a>GMSL<\/a>H-MTD<\/a>HSD<\/a>Kabelov\u00e1 konfekce<\/a>Koax<\/a>Latence<\/a>LiDAR<\/a>LVDS<\/a>Multi-Gig-Ethernet (multigigabitov\u00fd Ethernet)<\/a>On-board diagnostics (OBD)<\/a>P\u00e1te\u0159n\u00ed linky<\/a>POF<\/a>Radar<\/a>Senzory<\/a>St\u00edn\u011bn\u00ed<\/a>V2X<\/a>WiGig<\/a><\/div>\n
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