Tirada sii kordheysa ee aaladaha Apple ayaa hadda leh ereyga "Retina" ama " Retina Display " oo lagu daray sharraxaaddooda ama magacooda. Laakin waa maxay bandhiga Retina ? Ma u tagtaa nooca Retina ee aaladda Apple haddii lagu siiyo doorashada? 

Dhawaan, waxaa laga yaabaa inaadan haysan doorasho, sida Apple uu u socdo ^(Apple)retina buuxa , laakiin xitaa markaa waa muhiim in la fahmo waxa dhabta ah ee ka dambeeya magacooda sumadda. 

Bandhigyada retina^(Retina) waa muuqaal tayadoodu sareyso. Kuwa Apple ay dareemeen inay yihiin tallaabo kor u qaadaysa shashooyinkooda aan Retina ahayn , waxay u qalmeen magac ganacsi oo calaamadeysan. Haddaba maxay tahay dhammaan buuqa run ahaantii ku saabsan?

Waa maxay Muujinta retina?

Si aad u fahamto sababta loogu yeedhay bandhigyada "Retina", waxaa waxtar leh in la fahmo waxa erayga uu yahay! Marka la soo koobo, retina waa qayb ka mid ah anatomy ishaada. Asal ahaan waa dareenka sawirka isha, haddii aad rabto inaad barbar dhigto kamarada dhijitaalka ah.

Muraayada isha waxay diiradda saartaa iftiinka xuubka xuubka, samaynta sawir. Unugyada xasaasiga ah ee iftiinka leh ee ka kooban retina waxay soo maraan macluumaadkaas iyagoo isticmaalaya dareemaha indhaha, halkaasoo ay ka helaan kiliyaha muuqaalka ee maskaxda si ay u habeeyaan. 

Maxay tani ka qabtaa bandhigyada Apple 's Retina ? Sababta ay Apple u dooratay magacan ayaa ah maadaama ay aaminsan yihiin in isha bini'aadamka aysan arki karin grid pixel-ka muraayadda Retina inta lagu jiro isticmaalka caadiga ah. Waa qirasho in bandhigyadan la sameeyay si looga jawaabo aragtida bini'aadamka, halkii si fudud loo raadin lahaa tilmaamo sare.

Waxay ku saabsan tahay Pixels

Waxa muhiimka ah ee lagu ogaanayo bandhigyada Retina waa in ereyga uusan tixraacin wax tignoolajiyada bandhigeed gaar ah. Apple hadda waxay leedahay labadaba LED, LCD iyo bandhigyada OLED kuwaas oo labadaba lagu iibiyo calaamadda Retina . Shaashadahani ma wadaagaan sifo kale sida xallinta, qaabka, cabbirka, taranka midabka ama saamiga isbarbardhigga. Kaliya waxay leeyihiin pixels ka sarreeya heerka cufnaanta qaarkood. 

Pixels, haddii ay dhacdo inaadan garanayn, waa "cunsurka sawirka". Waa qaybta ugu yar ee sawirka dhijitaalka ah lagu jebin karo. Pixel kastaa waxa uu leeyahay xubno-pixel-hoosaadyo kuwaas oo u ogolaanaya inay muujiyaan xaddi kala duwan oo casaan, buluug iyo iftiin cagaaran, si wax ku ool ah u ogolaanaya in pixel kasta soo saaro midab kasta.

Markaad dhigto pixels gudaha shabaqyada, waxaad soo saari kartaa sawirro adoo u sheegaya pixel kasta sida saxda ah ee ay tahay in midabkiisu iyo iftiinkiisu noqdo. Mar kasta oo aad muraayadda indhahaaga saarto, ayaa waxa sii caddaanaya shabagga pixel laftiisa. Waxay la mid tahay inaad si dhow u eegto sawirka wargeyska. Sawirku wuxuu u kala baxaa dhibco khad gaar ah. 

Marka ay timaado bandhigyada aan retina-ka ahayn, uma baahnid inaad si gaar ah ugu dhawaato shaashadda si aad u aragto shabkada pixels. Waxaa jira hadhuudh kala duwan iyaga oo si gaar ah u muuqda dhinac-dhinac leh guddi retina . Haddaba sidee bay bandhigyada Retina u gaadhaan muuqaalkaas fiiqan, ee aan xidhnayn?

Cufnaanta Pixel^{(Pixel Density)} iyo Fogaanta Daawashada^{(Viewing Distance Are)} ayaa ah tirooyinka furaha ah^{(Key Numbers)}

Si aad ugu qalanto muujinta "Retina", waa in shaashadu aysan yeelan pixels gaar ah oo la garan karo marka la eego fogaanta caadiga ah. Markaa, waxaa jira laba tiro oo halkan ku lug leh. 

Ka hore waa PPI ama Pixels per Inch . Tani waa cabirka cufnaanta pixel. Markasta oo pixels aad ku tuujin karto inch kasta oo shaashad ah, inta aad isugu xidhan yihiin iyo inta la arki karo pixel kasta. 

Lambarka labaad waa fogaanta daawashada caadiga ah. Si loo noqdo muqaalka Retina^(Retina) , pixels-ka gaarka ahi waxa ay u baahan yihiin in aanay indhaha qaawan arki karin marka la eego fogaanta caadiga ah. Qalabka casriga ah ama tablet-ka, isku darka tirooyinkaas waxay u muuqdaan inay yihiin ilaa 300PPI oo 10 ilaa 12 inji u jira wejigaaga.

Sidaad u badan tahay inaad horeba u garatay, waxa jira lambar saddexaad oo ay tahay inay qayb ka noqoto isla'egta retina: cabbirka muuqaalka. 

Inta laga yaabo inaad gacanta ku hayso kiniin ama taleefoon, Laptop-ka ama muraayada miiska ayaa guud ahaan ka fog taas. Qayb ahaan sababtoo ah qaabka qalabka, laakiin badanaa sababtoo ah bandhigyadaas ayaa aad u weyn si raaxo leh loogu eego 10 inji oo wejigaaga ah. Markaan tagno telefishinada, cufnaanta pixel-ku aad ayuu uga hooseeyaa 300PPI, laakiin wali waxaa lagu tiriyaa "retina" sababtoo ah waxaad caadi ahaan ka eegtaa 6 cagood ama ka badan. 

Haddii aad rabto inaad ogaato in bandhigga la siiyay ee aaladda aan Apple ahayn uu u qalmo calaamadaynta Retina , waxaad isticmaali kartaa xisaabiyaha khadka^{(online calculator)} si aad u hesho fikrad sax ah.

Bandhigyada Retina waxay u baahan yihiin Isbeddel Software^{(Retina Displays Require Software Changes)}

Xataa muqaalka Retina^(Retina) kuma dari karo tafaasiisha sawirka aan meesha ku jirin in lagu bilaabo. Haddii sawirka shaashadda uu leeyahay qaraar ka hooseeya kan soo bandhigay laftiisa, markaa pixels-ka dhabta ah ee dhabta ah ayaa asal ahaan la isku daray si loo muujiyo pixels waaweyn si ay u muujiyaan sawirka. Waa qaab zoom dhijitaal^{(digital zoom)} ah oo wax ku ool ah waxayna u eegi kartaa pixelated iyadoo ku xidhan inta uu le'eg yahay farqiga u dhexeeya.

Inkastoo aysan jirin wax badan oo aad ka qaban karto sawirada xallinta hooseeya ee shabakadaha iyo wixii la mid ah, dhibaatada dhabta ah waxay ka timaaddaa walxaha nidaamka sida qoraalka iyo calaamadaha. Haddii ay tahay in kor loo qaado, waxay u muuqdaan kuwo aad u jilicsan. IPhone -ka Retina^{(A Retina)} , tusaale ahaan, waxa uu leeyahay afar jeer cufnaanta pixel-ka hore ee aan Retina ahayn. 

Tani waxay ka dhigan tahay in iOS uu u baahan yahay inuu soo bandhigo hantida afar jeer heerka faahfaahinta si uu runtii uga faa'iidaysto bandhigga xallinta sare. Taasi waxay qaadanaysaa awood xisaabeed oo dheeraad ah iyo xusuusta. Akhbaarta wanaagsan ayaa ah in Apple Silicon uu si cajiib ah u awood badan yahay oo uu leeyahay faras fara badan, markaa dhib badan ma ahayn. 

Soosaarayaasha abka waa inay ka digtoonaadaan xallinta Retina iyo sida barnaamijkoodu u eg yahay. Ciyaaraha fiidyowgu^(Video) gaar ahaan ma rajayn karaan inay sawiro ku sameeyaan xallinta Retina ee hooyo oo ay sii ahaan karaan kuwo la ciyaari karo. Markaa horumariyayaashu waa inay adeegsadaan xeelado kor u qaadaya si ay uga hortagaan sawirka u dambeeya inuu u ekaado mid xannibmay ama dhayalsan.

Jidka loo maro retina ma tahay?

Dhinac-dhinac^{(Side-by-side)} , bandhigyada ' Retina ' ayaa si cad uga sarreeya kuwa cufnaanta pixel hoose leh. Si kastaba ha ahaatee, qalabka cufnaanta sare ee pixel ayaa leh faa'iidooyin badan. Hal shay, aad bay qaali u yihiin! Aaladaha^(Devices) leh qaraarada sare waxay yeelan karaan nolol batari gaaban waxaana jira waxqabadkii aan soo sheegnay. 

Apple waxa ay qabatay shaqo aad u fiican oo ah in ay isku dheelitirto qaraarada Retina iyo dhammaan arrimahan kale, laakiin ha u malayn in Apple uu yahay kan keliya ee gaadhay go'aamadan. Aalado kale oo badan oo calanka ah (iyo hadda dhexda) waxay leeyihiin cufnaanta pixel ku dhow ama ka sarreeya 300PPI. Mararka qaarkood iyada oo aan u dhigmin ficil dheellitirka taxaddarka leh ee Apple .

Tusaale ahaan, qaar ka mid ah taleefannada calanka ee Samsung Galaxy ayaa siiya dadka isticmaala ikhtiyaarka ah inay ku socodsiiyaan sawirka dhabta ah ee xallinta hoose marka loo eego shaashadu awood u leedahay. Kaliya moodooyinkoodii ugu dambeeyay ayaa soo bandhigi kara sawirro cabbir buuxa leh oo heerar sare ah iyagoo weli helaya nolol batari ku filan. Telefoonadii hore waxay awoodeen inay bixiyaan laba ka mid ah fursadahan isku mar.

Kiniinnada^(Retina) soo bandhigay retina gaar ahaan waxay aad ugu fiican yihiin akhrinta sheeko-gacmeedyo heer sare ah iyo buugaag majaajillo ah iyo, dabcan, inay ku shaqeeyaan sawirro tayo sare leh. Taleefannada, faa'iidadooda ugu weyni waa inay si fudud isha ugu raaxaystaan. Sawiradu waxay u muuqdaan kuwo lagu rinjiyeeyay muraayadda halkii ay ka ahaan lahaayeen saadaal dhijitaal ah oo xoogaa daahsoon. 

Ugu dambeyntii, cufnaanta pixel-fasalka retina waxay noqon doontaa wax caadi ah dhammaan qalabka iyo dhammaan noocyada kala duwan. Laakiin haddii aad rabto dhadhanka mustaqbalkaas qumman ee pixel-ka maanta soo bandhigida Retina waa doorasho weyn.

What Is a Retina Display: Everything You Need to Know

A growing number of Apple devices nоw hаve the word “Retina” or “Retina Display” included in their description or name. But what is a Retina display? Should you go for the Retina version of an Apple device if given the choice? 

Soon, you might not have a choice, as Apple goes full Retina, but even then it’s important to understand what’s actually behind their snappy brand name. 

Retina displays are essentially high quality displays. Ones that Apple felt are such a step up from their non-Retina screens, it deserved a trademarked name. So what’s all the fuss actually about?

What Is a Retina Display?

To understand why they’re called “Retina” displays, it’s helpful to understand what the word means! In short, the retina is a part of your eye’s anatomy. It’s essentially the image sensor of the eye, if you want to compare it to a digital camera.

The lens of the eye focuses light onto the retina, forming an image. The light-sensitive cells that make up the retina pass along that information using the optic nerve, where it’s received by the visual cortex of the brain for processing. 

What does this have to do with Apple’s Retina displays? The reason Apple chose this name is because they believe that the human eye can’t see the pixel grid of a Retina display during normal use. It’s an acknowledgement that these displays have been created in response to human perception, rather than simply a quest to chase higher specifications.

It’s All About Pixels

The important thing to realize about Retina displays is that the term doesn’t refer to any particular display technology. Apple currently has both LED, LCD and OLED displays that are both sold under the Retina trademark. These screens don’t share any other attribute such as resolution, shape, size, color reproduction or contrast ratio. They just have pixels that are over a certain density threshold. 

Pixels, in case you didn’t know, are “picture elements”. They are the smallest part that a digital image can be broken up into. Each pixel has sub-pixel elements that let it show varying amounts of red, blue and green light, effectively letting each pixel reproduce any color.

When you lay pixels out in a grid, you can produce images by telling each pixel exactly what its color and brightness value should be. The closer you put a display to your eye, the more obvious the pixel grid itself becomes. It’s like looking at a newspaper photo too closely. The picture breaks up into individual ink dots. 

When it comes to non-retina displays, you don’t have to be especially close to the screen to see the grid of pixels.There’s a distinct graininess to them that’s especially apparent side-by-side with a Retina panel. So how do Retina displays achieve that sharp, seamless look?

Pixel Density and Viewing Distance Are the Key Numbers

To qualify as a “Retina” display, the screen must have no discernable individual pixels at normal viewing distances. So, there are two numbers involved here. 

The first is PPI or Pixels Per Inch. This is a measure of pixel density. The more pixels you can squeeze into every inch of screen, the more closely packed together they are and the less visible each pixel is. 

The second number is the typical viewing distance. To be a Retina display, individual pixels need to be invisible to the naked eye at typical viewing distance. For smartphone or tablet devices, that combination of numbers seems to be about 300PPI at 10 to 12 inches from your face.

As you’ve probably already realized, there’s a third number that has to be part of the retina equation: display size. 

While you might hold a tablet or phone at arm’s length, a laptop or desktop monitor is generally further away than that. Partly because of the device form factor, but mainly because those displays are too large to view comfortably at 10 inches from your face. When we get to televisions, the pixel density could be much lower than 300PPI, but still count as “retina” because you typically view them from 6 feet or more away. 

If you want to know whether a given display on a non-Apple device would qualify for the Retina branding, you can use an online calculator to get an accurate idea.

Retina Displays Require Software Changes

Even a Retina display can’t add detail into an image that isn’t there to begin with. If the image on screen has a lower resolution than the display itself, then the real physical pixels are essentially grouped together into larger virtual pixels to display the image. It’s effectively a form of digital zoom and can look pixelated depending on how large the disparity is.

While there’s not much you can do about low resolution images on websites and the like, the real problem comes from system elements such as text and icons. If they have to be upscaled, they end up looking very chunky. A Retina iPhone, for example, has four times the pixel density of its non-Retina forebears. 

This means that iOS needs to display assets at four times the detail level to really take advantage of the high-resolution display. That takes additional computing power and memory. The good news is that Apple Silicon is incredibly power efficient and has plenty of horsepower, so it hasn’t been much of a problem. 

App developers have to be mindful of Retina resolutions and how their apps look. Video games in particular can’t hope to render images at the native Retina resolution and remain playable. So developers have to use upscaling tricks to prevent the final image from looking blocky or blurry.

Is Retina The Way to Go?

Side-by-side, Retina displays are clearly superior to ones with lower pixel density. However, high pixel density devices have plenty of downsides. For one thing, they are much more expensive! Devices with such high resolutions can have shorter battery lives and there’s the aforementioned performance hit. 

Apple has done a great job of balancing Retina resolutions with all of these other factors, but don’t think Apple’s the only one to achieve these resolutions. Many other flagship (and now mid-range) devices have pixel densities close to or above 300PPI. Sometimes without the equivalent of Apple’s careful balancing act.

For example, some Samsung Galaxy flagship phones offer users the option of running the actual image at a lower resolution than the screen is capable of. Only their latest models can display full-resolution images at high refresh rates while still achieving adequate battery life. Older phones have only been able to offer two of these options at the same time.

Retina display tablets in particular are fantastic for reading high-resolution graphic novels and comic books and, of course, for working with high-quality photos. On phones, their main advantage is simply being extremely pleasing to the eye. Images appear painted into the glass rather than a slightly fuzzy digital projection. 

Eventually, retina-grade pixel densities will become the norm across all devices and all brands. But if you want a taste of that pixel-perfect future today a Retina display is a great choice.

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