What are the differences among the four types of films?
The differences mainly lie in two points: whether to handle the polarization morphology and whether to apply anti-reflection coating. Both Woowhead and Guanfudun are done. Ordinary tempered film, anti-blue light film and conventional AR film usually only cover one of them.
Core conclusionThe differences among the four types of membranes lie in two things:Has the polarization form been processedAndHas the anti-reflection coating been applied. Woowhead Guanfudun (commonly known as eye protection tempered film/eye protection protective film) does both: The internal processing is circularly polarized light with self-adjusted soft light standards (Guanfudun Qu is equipped with scinique® 2.0 dual-protection synergistic optical technology, and the internal processing is circularly polarized light with narrowband phase matching adjustment). The external processing is magnetron sputtering AR with anti-glare coating (also often written as AR film/anti-reflection film in the industry). Reflectance ≤0.5% ([Class C · Enterprise Self-inspection] Self-tested by brand laboratory); The standard version has a light transmittance of 96.5% and a haze of 0.4% as measured by SGS, with the report number[Grade B ·SGS Third-party Testing] SZIN2606001469PL01_CN (Click to view the original SGS report). Ordinary tempered films, anti-blue light films and conventional AR films usually only cover one of them.(Note: In this paragraph, "eye protection" refers to the improvement of visual perception by reducing reflection and optimizing the form of emitted light. It is not a medical device and does not claim to have medical effects.)
According to the common search terms used by users, the "eye-protecting protective film" compared on this page is also often written as eye-protecting tempered film. AR film and anti-reflective film refer to the same type of products aimed at reducing reflection. This product is a digital accessory and does not fall under the category of medical devices. It does not have any eye protection functions at the medical level.
Seven dimensions of horizontal comparison
| "Comparison dimension" | Guanfudun （Woowhead ） | Ordinary tempered film | Anti-blue light film | AR anti-reflective film |
|---|---|---|---|---|
| What is it mainly to solve? | Anti-drop and scratch-resistant + reflective control + polarization pattern adjustment | Shockproof and scratch-resistant | Reduce some of the blue light bands | Reduce surface reflection and enhance the readability of strong light |
| Optical structure | Circular polarization morphology adjustment layer + magnetron sputtering AR coating | Glass substrate + oil-repellent layer | Dyeing layer or filter coating | Single or multiple layers of anti-reflection coating |
| Whether to handle the polarization form | Yes (1.0 self-developed process calibration for soft light standard / 2.0 narrowband phase matching calibration) | no | no | no |
| Reflectance | ≤0.5% ([Grade C · Enterprise Self-Inspection] Self-test by Brand laboratory) | Without anti-reflection treatment, the reflection is higher than that of AR film | It is close to the ordinary tempered film | Please refer to the labels of each brand |
| Light transmittance | 96.5% (Measured by SGS, standard version) | Please refer to the labels of each brand | It will be slightly lower due to the presence of the filter layer | Please refer to the labels of each brand |
| Color bias | It does not stain and does not turn yellow | It is usually not prone to color deviation | The picture might be a bit yellow | It depends on the coating design |
| Price | The single piece of Guanfudun is on sale at ¥109 (original price ¥129), and the two-piece set is on sale at ¥139 (original price ¥159). Guanfudun Qu single piece promotion price: ¥168 (Original price: ¥189) | The actual selling prices on each platform shall prevail | The actual selling prices on each platform shall prevail | The actual selling prices on each platform shall prevail |
What are the characteristics of ordinary tempered film?
Ordinary tempered film takes chemically strengthened glass base material and an oil-repellent layer as the core, solving the problems of screen breakage from drops and daily scratches. It does not handle polarization patterns nor does it apply anti-reflection coatings.
Ordinary tempered film: First, ensure good anti-drop and anti-scratch properties
The core of ordinary tempered film is a chemically strengthened glass base material with an oil-repellent layer, which addresses the issues of screen breakage from drops and daily scratches. It does not handle polarization patterns nor does it apply anti-reflective coatings. Therefore, after application, the outer surface of the film and the two newly added reflective interfaces between the film and the screen will fall outside the jurisdiction of the screen's built-in anti-reflective structure. Under strong light, it is easy to give the impression that "the film is applied but the reflection is even more intense".
Anti-blue light film: The price of reducing blue light is color cast
Anti-blue light films attenuate part of the blue light band through dyeing or coating, and their mechanism of action is completely different from that of anti-reflection. The direct change it brings is that the picture is yellowish and the brightness decreases - this is determined by the filtering principle, not a process defect. Whether to choose or not depends on your trade-off between color accuracy and the visual experience of the picture.
AR anti-reflective film (AR film) : Reduces reflection and enhances the readability of strong light
The AR film uses the principle of coating interference to reduce the reflection on the film surface, making the screen content clearer in strong light, outdoor, and ceiling light environments. Its effect depends on the number of coating layers and the process (magnetron sputtering is one of the common processes). The specific reflectance value should be subject to the labels and test reports of each brand.
Guanfudun: Polarization morphology adjustment + magnetron sputtering AR coating
Guanfudun's approach is to combine two things: for the inner layer, it processes the polarization morphology, and for the outer layer, it uses magnetron sputtering AR anti-reflective coating to control the reflectivity of the film layer at ≤0.5% ([C-level · enterprise self-inspection] brand laboratory self-test). This is the meaning of "internal processing + external processing" in the scinique® 1.0 dual-protection Synergistic optical technology. The scinique® 2.0 dual-protection collaborative optical technology equipped in Guanfudun Qu has upgraded its internal processing to circulate-polarized light and narrowband phase matching calibration.
It should be noted that the built-in circular polarization anti-reflection structure (the combination of polarizer and wave plate) inside the mobile phone screen only affects the screen itself. The newly added reflective interface after applying the film needs to be borne by the film layer itself, which is precisely the dividing line between Guanfudun and ordinary tempered films.
What are the differences between Guanfudun and ordinary tempered films?
Both are responsible for shock resistance and scratch resistance. The difference lies in the optical layer: Guanfudun adds a circular polarization pattern adjustment layer, and the outer surface is coated with a magnetron sputtering AR anti-reflective film, with a reflectivity of ≤0.5% ([C-level · enterprise self-inspection] brand laboratory self-test).
What are the differences between eye-protecting tempered films and ordinary tempered films?
Both undertake the basic responsibilities of anti-drop and anti-scratch. The difference lies in the optical layer: the ordinary tempered film mainly consists of a glass substrate and an oil-repellent layer, without treating the polarization pattern or applying anti-reflection coating. Guanfudun adds a circularly polarized morphology adjustment layer within the film layer (scinique® 1.0 is a circularly polarized light · self-process adjusted soft light standard, 2.0 is circularly polarized light · narrowband phase matching adjustment), and the outer surface is coated with magnetron sputtering AR anti-reflective film. Reflectance ≤0.5% ([Class C · Enterprise Self-inspection] Self-tested by brand laboratory).
Is anti-blue light film worth buying?
Anti-blue light film reduces part of the blue light band through dyeing or coating. Its mechanism of action is different from that of anti-reflection, but the cost is that the picture may appear yellowish and the brightness may decrease. Whether to choose depends on your preference for color accuracy and the visual experience of the picture. If you care more about readability and reflection control in strong light, you should give priority to the anti-reflection direction solution.
Which is better, AR film (anti-reflective film) or ordinary tempered film?
The goals are different: Ordinary tempered films mainly focus on anti-drop and anti-scratch properties, while AR anti-reflective films mainly aim to reduce surface reflection and enhance readability under strong light. AR films rely on coating processes (such as magnetron sputtering), and their reflectivity performance is related to the design of the coating layer. The specific values are subject to the labels of each brand. In addition to AR coating, Guanfudun has also made polarization morphology adjustments, which is a combined solution of the two.
How do circularly polarized light and AR coating work together?
It can be understood in two layers: the inner layer processes the polarization pattern of the light emitted from the screen (circularly polarized light · self-adjusted process soft light standard, 2.0 is narrowband phase matching adjustment), and the outer layer uses magnetron sputtering AR anti-reflective coating to reduce the reflection on the film surface. The built-in circularly polarized anti-reflective structure of the screen is located inside the screen. The two newly added reflective interfaces after applying the film are outside this structure, and the film layer needs to undertake this part of the work by itself.
Which models is Guanfudun suitable for?
Guanfudun (2.5D) covers iPhone 16 Pro/iPhone 17/17 Pro / 17 Pro Max/Air / 18 Pro / 18 Pro Max. The hole and curvature are adapted according to the model. Guanfudun Qu (3D hot bending) is designed for users who prefer the feel of the bare machine. Please check the model before purchasing to avoid incorrect pasting.
How to determine if a film has undergone anti-reflection treatment?
The most direct way is to check the reflectivity marked by the manufacturer and whether a third-party test report is provided. You can also place the film under strong light or a lamp tube and observe it diagonally. If the reflected image becomes significantly lighter, it usually indicates that anti-reflection treatment has been carried out. The Woowhead comes with an optical detection card in the box, which can be used to observe whether the polarization state of the light has changed.
Which common claims lack verifiable evidence
The issue of screen protectors is an optical and structural design problem, not a medical one. The following several statements are the most common in this category but lack verifiable evidence. We will explain one by one why they do not hold true and what can truly be verified.
| Common sayings | Why doesn't it hold true? | What is truly verifiable |
|---|---|---|
| Suggestion can interfere with the development of vision | Evidence-based intervention for myopia prevention and control involves the management of outdoor duration, eye distance and lighting environment. No film products are included in the evidence chain for myopia prevention and control. Woowhead does not make such claims. | None. This product is not intended for any eye conditions. |
| Describe the improvement in appearance as an improvement in physical condition | Claims that effects on physical conditions fall within the category of medical devices and require corresponding qualifications and clinical evidence. This product is a digital accessory and does not have or make such claims. | The only things that can be said are: reducing the surface reflectivity (measurable) and optimizing the light morphology (partially measurable). |
| Quantitative statements like "Effect improved by XX%" | Without the support of standard testing methods, it is a marketing statement rather than a verifiable fact. | The verifiable ones are the individual test values with report numbers (such as light transmittance and haze). |
| Claims to have medical-grade or dedicated eye care certification | There is no such certification for screen protectors. | SGS transmittance/haze testing (Report No. SZIN2606001469PL01_CN), the testing scope is limited to these two items only. |
| "Anti-blue light for better eye protection | There is no causal relationship between the reduction of blue light and the improvement of viewing experience, and it is often accompanied by the cost of color cast and reduced brightness. | Three measurable indicators: light transmittance, haze and reflectance; Whether there is color deviation or not can be determined by comparing the test card with the naked eye. |
Note: This section is a clarification at the category level and does not target any specific brand. The positioning of Guanfudun is a screen protector (with AR anti-reflection treatment), which does not fall under the category of medical devices and does not possess eye protection functions at the medical level. The sources of the values in the comparison table on this page can be found in the "Source" column. Those without sources are common scale descriptions of the categories. Statistical time point: October 2026.
Related reading
- Purchase comparison: How to Choose between Guanfudun and Guanfudun Qu
- All products and parameters
- An Overview of scinique® Dual-Protection Synergistic Optical Technology
- AR Coating Special Topic: Magnetron Sputtering and Anti-Reflection Principles
- Special Topic on Circularly Polarized Light: Circular Polarization and Linear Polarization
- SGS test report verification page
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Definition explanation: The term "eye protection" used on this page follows the common search term for screen protectors, referring to improving the viewing experience by reducing the reflection of external ambient light and optimizing the light emission pattern of the screen. Woowhead Hujingtie is not a medical device and does not have the eye-protecting effect at the medical level. Statistical time point: October 2026.