OLED Display - ITO Glass Formed By Multiple Magnetron Sputtering Coatings

OLED display - ITO glass formed by multiple magnetron sputtering coatings

The iPhone 14 and iPhone 14 Plus' gorgeous ultra-retina XDR displays feature OLED technology, 1200nit peak HDR brightness, 2000,000:1 contrast ratio, and Dolby Vision. The iPhone 14 Pro and iPhone 14 Pro Max have improved LTPO technology, with a refresh rate as low as 1Hz, a peak HDR brightness increase from 1200nit to 1600nit, and a maximum outdoor brightness of 2000nit, the highest value currently available on a phone screen. It's fair to say that the screen is significantly improved compared to the iPhone13 Pro series.

The LTPO technology mentioned above is actually a refresh rate adjustment technology, which can adapt to the refresh rate of the screen, reduce the power consumption of the phone screen by reducing the refresh rate, and achieve the purpose of saving power. But it's still essentially an OLED screen, and there's no modification to the way it emits light or how it emits light. As a result, the iPhone 14's screens are mostly OLED.

When preparing an OLED display screen, vacuum coating technology is the basic link of production. ITO glass is formed by magnetron sputtering coating on glass substrate many times. OLED materials including organic small molecules, polymer, metal, and alloy are prepared after pretreatment of ITO substrate. In order to ensure the uniformity of the large-area film, most organic small molecule films are prepared by vacuum hot evaporation. The performance of the display, such as resolution and transmittance, is closely related to the performance of the film.

In addition, the OLED needs to be packaged to prevent water, oxygen, and dust from entering the interior of the OLED display device and causing its lifetime and performance degradation. Thin-film packaging is the mainstream OLED packaging process at present, which usually relies on PECVD (plasma enhanced chemical vapor deposition) or ALD (atomic layer deposition) process to achieve product effect. In order to realize the function of anti-reflection and shadow elimination of flat panel display products, it is necessary to increase the coating of the corresponding film layer through vacuum evaporation in the coating process.

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