Apple Watch Series 4 uses patent-pending LTPO TFT technology to extend battery life

“In August IHS Markit posted a report titled ‘Apple may introduce LTPO TFT backplanes for iPhones to prolong battery life,'” Jack Purcher reports for Patently Apple. “The only thing that the report got wrong was that Apple was preparing to use their patent-pending technology exclusively on Apple Watch 4 and not the iPhone.”

“On one of Apple`s marketing pages they shout out the fact that their all-new Apple Watch 4 display uses LTPO technology,” Purcher reports. “The IHS Markit report listed three Apple patents that covered this technology without providing any patent numbers. With a little digging we were able to find the three patents.”

“With Apple adopting this technology for Apple Watch 4, these patents are now patents fulfilled,” Purcher reports. “If you’re interested in learning more about this new technology, links to each patent are provided…”

Read more, and see Apple’s patent application illustrations, in the full article here.

MacDailyNews Take: Perhaps coming to larger displays as found in iPhone (and iPad) in the future?

Apple may introduce LTPO TFT backplanes for iPhones to prolong battery life – August 24, 2018


      1. Hmm, I didn’t know OLEDs even had backplanes. Followed the link and saw that they referred to the iPhone X screen as a pentile configuration and resolution as less than previous LCDs in RGB Stripe configuration. That was an argument about Samsungs OLEDs a while ago, is it still true that the resolutions don’t compare apples to apples?

    1. Per the article (link provided above):
      “The IHS report importantly noted: “In the diagram, we can see that the backplane includes both the polysilicon (LTPS TFT) and the IGZO (Indium Gallium Zinc Oxide), otherwise known as Oxide TFT. Basically, LTPO equals to Low Temperature Polycrystalline Oxide. The pixel circuit would be patterned such that the switching TFT would be p-Si and the drive TFT would be IGZO.”

      The report further noted that there were several possible reasons for why Apple chose to introduce LTPO:

      * To be more closely involved in flexible OLED component cost and technology
      * To reduce power consumption of Apple products
      * To achieve high electron mobility for higher resolution of its displays
      * To better manage its display supply chain and that of its partner-display manufacturers”

      The article includes some illustrations to help understand the concepts involved.

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