HorizonTech4You - https://goo.gl/sI6Swo KnowledgeBase4You - https://goo.gl/AIwUuq Subscribe - https://goo.gl/sI6Swo Facebook - https://goo.gl/BgRPWj Twitter - https://goo.gl/bTSYL9 Google+ - https://goo.gl/FqtJiC 32 bit Vs 64 bit - https://goo.gl/2Rhx5V Retina Pixel density PPI - https://goo.gl/y0QMmA Page File & Swap Partition - https://goo.gl/UZ7kF4 BIOS & UEFI - https://goo.gl/vRBNbM Demo Noise - https://goo.gl/mXDbof Noise Cancellation - https://goo.gl/vRBNbM 4K Resolution - https://goo.gl/LdBlW5 Demo RAMDisk - https://goo.gl/Gv5RAb RamDisk - https://goo.gl/7805uF RAM - https://goo.gl/NAZGz0 SSHD - https://goo.gl/W8WSTS SataExpress - https://goo.gl/PE9du8 SSD - https://goo.gl/gsKAWm DataFlow Bottleneck - https://goo.gl/RbL5qx Booting Process & POST - https://goo.gl/M68xGW Comuter Data Memory Units - https://goo.gl/HCvdFV USB TypeC - https://goo.gl/7O5BBj Disk Defragmenter - https://goo.gl/UippMR Headphone - https://goo.gl/dLsbPw SSD Vs HDD - https://goo.gl/uOkGIC USB 2.0 Vs USB 3.0 - https://goo.gl/ypEuJW Comuter Data Memory Units - https://goo.gl/H8rtrR [Hindi] What is Retina Display? Pixel Density, PPI (Pixel Per Inch) Explained in Detail Tutorial | HorizonTech4You Retina Display (marketed by Apple with a lowercase 'D' as Retina display) is a brand name used by Apple for screens that have a higher pixel density than their previous models. The goal of Retina Displays is to make the display of text and images extremely crisp, so pixels are not visible to the naked eye. This allows displays to rival the smooth curves and sharpness of printed text and immediacy of photographic prints. These better quality displays have been gradually released over a number of years, and the term is now used for nearly all of Apple products containing a screen, including the Apple Watch, iPhone, iPod Touch, iPad, Macbook, MacBook Pro, and iMac.[6] Apple uses slightly different versions of the term for these models, including Retina HD Display (iPhone 6 models), and Retina 5K Display, Retina HD Display or Retina 4K/5K Display (iMac). Apple's Retina Displays are not an absolute standard but vary depending on the size of the display on the device, and how close the user would typically be viewing the screen. Where users view the screen at a closer distance to their eyes, as on smaller devices with smaller displays, the displays have more PPI (Pixels Per Inch), whilst larger devices with larger displays where the user views the screen further away use fewer PPI. Later device versions have had additional improvement, either counted by an increase in the screen size (the iPhone 6 Plus) and/or by PPI (the iPhone 6 and 6 Plus, and iMac with Retina 4K/5K Display), thus Apple using the name "Retina HD Display" or "Retina 4K/5K Display". When an Apple product has a Retina Display, each user interface widget is doubled in width and height to compensate for the smaller pixels. Apple calls this mode HiDPI mode. Apple has applied to register the term "Retina" as a trademark in regard to computers and mobile devices with the United States Patent and Trademark Office, Canadian Intellectual Property Office, and in Jamaica.[7][8] On November 27, 2012 the US Patent and Trademark office approved Apple's application and "Retina" is now a registered trademark for computer equipment. Pixels per inch (PPI) or pixels per centimeter (PPCM) is a measurement of the pixel density (resolution) of an electronic image device, such as a computer monitor or television display, or image digitizing device such as a camera or image scanner. Horizontal and vertical density are usually the same, as most devices have square pixels, but differ on devices that have non-square pixels.

• published: 29 Feb 2016
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