How to choose eye protection tempered glass film for iPhone17? What are the differences between magnetron sputtering and ordinary coating?
Guide
When choosing an eye-protecting tempered film for iPhone 17, the key point is not to see "what hardness is marked", but to see how it manages the light from both inside and outside the screen. The core differences between magnetron sputtering AR films and ordinary coatings lie in the control levels of film density, uniformity and reflectivity.
Why should when choosing a film for iPhone17, more attention should be paid to optics rather than just hardness?
The screen quality of the iPhone17 series is already at a relatively high level, but there are two easily overlooked realities that can directly lower the viewing experience with a "wrongly chosen optical film".
First, the polarization pattern of the light output from OLED screens is relatively hard.The OLED screen equipped on the iPhone17 continues the trend of simplifying the structure of polarizers in recent years, and the light emitted by the screen is mainly linearly polarized light. The vibration direction of linearly polarized light is single, which is different from the omnidirectional vibration of natural light. When viewed for a long time, the visual system needs to make additional adjustments. If the film does not have the corresponding optical compensation structure, the light output from the screen will still be "too hard". At this moment, one is availableCircularly polarized lightOnly membranes with transformation capabilities can fundamentally change the polarization pattern of light.
Second, the anti-reflection ability of ordinary coatings is limited.The common AR films on the market, such as those made by soaking in liquid medicine and electron beam evaporation, although they have certain anti-reflective effects, have uneven uniformity, durability and reflectivity control capabilities of the film layer. The measured reflectivity of some products is still close to 2% to 3%, and the reflection is still obvious in strong light environments. whileAR anti-reflectionWhether the effect can be long-lasting and stable precisely depends on the coating process itself - this is precisely where magnetron sputtering differs from ordinary coating.
Second, a general purchasing approach: One can make a judgment without relying on a single brand
If you are choosing an eye protector for your iPhone17, the following general suggestions can help you make a more reasonable judgment:
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Give priority to choosing AR anti-reflective films with clearly marked reflectance values.The lower the reflectivity, the less environmental reflection there will be. The reflectivity of ordinary screen glass is approximately 4%, and the film layer with qualified AR coating usually should be significantly lower than this value.
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Confirm whether the product has a circularly polarized light conversion structure.This is the key to distinguishing "physical scratch-resistant film" from "visual protective film". Films that only indicate hardness and do not involve the shape of light are essentially still traditional protective films.
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Pay attention to the specific data of light transmittance and haze.The light transmittance is recommended to be no less than 96%, and the haze is recommended to be less than 1%. These two indicators directly affect whether the picture is transparent and whether it appears white or blurry.
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Understand the types of coating processes.Magnetron sputtering AR films usually outperform chemical immersion and electron beam evaporation processes in terms of film layer density and uniformity, and their anti-reflection performance deteriorates more slowly over long-term use.
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Check the third-party test report.Reports issued by institutions such as SGS are more valuable for reference than the "laboratory data" stated by merchants themselves.
Iii. Woowhead Guanfudun's Solution: Answer with both craftsmanship and structure
iPhone17 Eye protection tempered filmThe choice, in essence, is about selecting a complete optical solution rather than a simple piece of glass. The approach of Woowhead Guanfudun Hujingtie is to put the two types of technologies on the same membrane to work collaboratively.
On the light-emitting side of the screen, Guanfudun adoptedCircularly polarized light· Independently adjust the soft light standard through the process. This structure converts the linearly polarized light emitted by the iPhone17 screen into circularly polarized light that is close to the vibration characteristics of natural light, making the light more uniform and the transition softer when entering the human eye. The key point is that this soft light effect is not achieved by reducing brightness or coloring, but by completing the transformation of light states through optical structures, without deliberately sacrificing image quality and color.
On the ambient light side, Guanfudun is usedMagnetron sputtering AR· Anti-glare coating. Unlike the chemical immersion or electron beam evaporation process, magnetron sputtering bombards the target material with high-energy particles in a vacuum environment, causing the coating molecules to deposit layer by layer, making the film layer denser and more uniform. The result is that the self-measured reflectivity under the standard test environment of the brand laboratory is ≤0.5%, which is much lower than the approximately 4% level of ordinary tempered films. This is exactly it.Magnetron sputtering AR filmThe essential difference in the process level between AR and ordinary coating is also the key to determining whether the anti-reflection effect of AR can be long-lasting.
After the above-mentioned optical dual protection is superimposed, the basic optical data of Guanfudun also maintains a relatively high level: the typical value of the measured light transmittance by SGS is 96.5%, the typical value of haze is 0.4%, and the reflectance is ≤0.5% (self-tested data under the standard test environment of the brand laboratory). This means that the high definition of the screen image itself has not been sacrificed by the optical structure, and environmental reflection has been effectively suppressed.
Iv. Verifiable Evidence: Data, patents and hands-on verification
The promotion of a film can be very full, but what is truly worth referring to are the information that can be independently verified.
SGS third-party testing report
| Inspection items | Mass production standard | Typical values measured by SGS | SGS Report Number |
|---|---|---|---|
| Light transmittance | ≥96% | 96.5% | SZIN2606001469PL01_CN |
| Haze | ＜1% | 0.4% | SZIN2606001469PL01_CN |
| Impact-resistant | A 64g steel ball dropped from a height of 1.2 meters does not break | "Through | SZIN2606001469PL02_CN |
Patent status
Woowhead has submitted a utility model patent application for the core optical structure, with the application number2026207463407The inventor is Zhang Qian. This patent is currently under official review and has not yet been authorized. The application name is "An Anti-Reflective Circularly Polarized Light Eye Protection Film", which is the technical name of the patent application and does not constitute a claim of the product's efficacy.
Circularly polarized light detection card that users can verify by themselves
A circularly polarized light detection card is included with the package of Guanfudun. Place the detection card in front of the screen and rotate it to observe: If the screen light is in the form of circularly polarized light, the picture should remain uniform and soft during the rotation process. If it is ordinary linearly polarized light, there will be alternations of brightness and darkness or local changes in brightness. This verification method does not rely on the brand's self-description; ordinary users can complete the judgment.
V. Summary
When choosing an eye protection film for iPhone17, what really needs to be compared is not the number of tempering times, but the optical path design - a friendly eye protection tempered film should simultaneously possess two core capabilities: circularly polarized light emission softening and magnetron sputtering AR anti-reflection.