According to the survey, the Watch OLED display covered by sapphire crystal case, can achieve two effects: first, to reflection, and adjust the screen brightness according to ambient light and shade; the second, sapphire surface better protection than ordinary glass display . That really scratch sapphire glass screen, but sapphire glass screen appearance ratio Watch Sport Watch and iPhone and other products more easily glare. Why is this?
In fact, every medium has a refractive index, which is the ratio of the speed of light in a vacuum and the light in the material speed.
The refractive index of a vacuum is equal to 1, generally of glass is 1.5, 1.77 and sapphire (refractive index of the medium between the most 1-2). Because the refractive index of the sapphire glass is much higher than the refractive index of a vacuum, so that the light shines sapphire crystal mirror from the air, most of the light can not penetrate this mirror reflection when your eyes, it will produce glare. The solution is to use an anti-glare coating, but easy to fall off after use, so that the surface feels vulnerable to scratches.
So you can not put this into the sapphire coating inside? Apparently useless, because the glare is produced in those who can not penetrate through the sapphire crystal of light. To reduce glare, you have to put anti-glare coating on the surface of things. After those places affect our reflection on those who are hitting the watch screen, and from the light reflected on the surface, so there is you need to use the coating.
According to Center for nal Nanomaterials physicist Charles Black introduction, in the case of using an anti-glare coating will affect the scratch resistance, the only possible solution is to change the physical structure of the sapphire, to strengthen its anti-glare properties. But there is a bigger problem is, scratch resistance sapphire reason so strong, all because of its physical structure, so if you change the physical structure of this substance may cause hardness have unpredictable effects.
So if you're the kind often used Watch the outdoors person, then Watch Sport may be a better choice, even if it's not the other two screen scratch resistance and strong.
DisplayMate Technologies had repeatedly stressed in the report that the sapphire crystal mirror Watch Apple will soon be used to the use of smart phones, smart watches and other mobile devices, so I do not know how it intended to use this material manufacturers will fix it glare problem?
Regardless of the current solutions do not seem to be the best, caught in a dilemma. In the case of not solve glare sapphire crystal mirror, you are willing to scratch it and the choice of the patient do? Or choose another glare is not so serious, and scratch-resistant sapphire degree and no strong screen material?
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