Chi tiết màn hình chống nhìn trộm của Galaxy S26 Ultra: có rỗ không? Hiệu quả thực tế?

Galaxy S26 Ultra Privacy Display: Detailed Analysis

Key Concepts:

• Privacy Display: A screen technology designed to limit visibility from side angles, protecting sensitive information.
• Flex Magic Pixel: Samsung’s name for the technology powering the privacy display on the Galaxy S26 Ultra.
• White Angle Pixel: Pixels designed to emit light at a wide angle, similar to traditional OLED pixels.
• Narrow Pixel: Pixels with a restricted light emission angle, contributing to the privacy effect.
• PL Matrix BM (Black Matrix): The black regions between pixels used for separation; utilized in creating the narrow pixel structure.
• Polarizer: A film in traditional OLED screens that reduces reflections but also absorbs some light, impacting brightness.

1. Introduction & Availability

The video focuses on the privacy display feature exclusive to the Galaxy S26 Ultra. While three models (S26, S26+, and S26 Ultra) are available, only the Ultra incorporates this technology. The video is sponsored by Cphone, which is currently taking pre-orders with various promotions, including trade-in options and installment plans. Details are available in the link provided in the comment section.

2. Operational Principle of Privacy Display

Samsung isn’t the first to explore anti-peeping screen technology; Sharp, Sony, and Nokia have previously experimented with similar concepts. However, the Galaxy S26 Ultra is among the first flagship devices to commercially implement this technology on a large scale.

The core technology relies on OLED screens, composed of self-illuminating pixels. Traditional OLEDs optimize for wide-angle viewing, ensuring consistent quality from any perspective. The Galaxy S26 Ultra utilizes two types of pixels: white angle pixels and narrow pixels.

• White Angle Pixels: Function like standard OLED pixels, emitting light in a broad spherical pattern.
• Narrow Pixels: Restricted light emission, resembling standard pixels but with a “tunnel” structure created using the PL Matrix BM. This structure, formed by layering the Black Matrix, directs light straight forward.

When privacy display is activated, the white angle pixels are largely deactivated (operating at only a few percent capacity), limiting visibility from side angles. The degree of restriction is adjustable via settings. Samsung began patenting this technology around 2020, with the “Flex Magic Pixel” panel appearing at Mobile World Congress 2024 and finally commercialized in the 2026 Galaxy S26 Ultra.

To mitigate brightness reduction, Samsung opted to omit the polarizer layer typically found in OLED screens. Polarizers reduce reflections but also absorb light. Instead, the S26 Ultra employs special color filters to achieve a similar anti-reflective effect without sacrificing brightness.

3. Real-World Experience & Observations

The reviewer notes the S26 Ultra’s screen still offers excellent anti-reflective properties, comparable to previous Galaxy S Ultra models and better than the standard S26/S26+. Color accuracy, contrast, and overall image quality remain high.

However, a slight “graininess” or “rasterization” is noticeable in text compared to the S25 Ultra, visible only upon close inspection and side-by-side comparison. This is attributed to the altered pixel structure with the added Black Matrix layers. The reviewer considers this a minor trade-off.

Activating privacy display results in a slight dimming of the screen and increased graininess. The effect is more pronounced when applied to the entire screen, but can be customized to specific areas like notifications, pop-ups, or password entry fields. A “maximum” setting further reduces brightness for enhanced privacy.

The reviewer prefers automatic activation for specific apps (e.g., Outlook email) and notifications, leveraging Samsung’s AI and NPU to intelligently identify areas requiring privacy. Activation can also be triggered via a double-press of the power button or through the quick settings panel.

4. Privacy Display vs. Screen Protectors

The reviewer expresses a preference against screen protectors, including anti-peeping versions. They highlight several drawbacks of screen protectors:

• Brightness Reduction: Anti-peeping screen protectors significantly reduce screen brightness.
• Quality Variation: Image quality depends heavily on the protector’s quality.
• Sharing Limitation: Screen protectors hinder easy content sharing, requiring phone tilting.

The privacy display offers a more seamless experience, allowing simple deactivation for sharing.

5. Key Arguments & Perspectives

The privacy display isn’t a “must-have” feature, but it’s valuable for users prioritizing privacy. While not a gimmick, it addresses a specific need. The reviewer acknowledges that it’s currently rare in flagship devices, particularly those officially available in Vietnam.

Samsung’s decision to pursue this complex technology, despite potential manufacturing challenges and increased costs, is commendable. The reviewer emphasizes the engineering achievement of bringing this concept to a commercially viable product.

6. Notable Quotes

• “Samsung họ đã giải quyết được những thứ đó để rồi chúng ta có được một cái sản phẩm thương mại luôn chứ nó không chỉ là một cái sản phẩm concept nữa.” ("Samsung overcame those challenges to bring us a commercial product, not just a concept.")
• “Với bản thân mình ha thì những cái tình huống mà mình cần privacy display á là có không phải là quá nhiều nhưng mình biết là có rất nhiều người bạn của mình thì họ không thích những người khác nhìn vào xung quanh họ cho nên là họ xài cái miếng dán màn hình là như thế.” ("For me personally, the situations where I need privacy display aren't too many, but I know many of my friends don't like others looking around them, so they use screen protectors.")

7. Data & Statistics

• Samsung began patenting the privacy display technology around 2020.
• The “Flex Magic Pixel” panel was showcased at Mobile World Congress 2024.
• The Galaxy S26 Ultra is the first commercial product to feature the technology, released in 2026.

8. Conclusion

The Galaxy S26 Ultra’s privacy display, powered by Flex Magic Pixel technology, represents a significant advancement in screen technology. While a slight trade-off in image clarity is present, the benefits of enhanced privacy and a seamless user experience outweigh the drawbacks for those prioritizing data security. Samsung’s commitment to innovation and overcoming manufacturing hurdles to deliver this feature is noteworthy. The privacy display is a valuable addition to the S26 Ultra, offering a unique solution for users concerned about visual privacy.