In-depth Analysis of the Xiaomi Redmi K80 Series: DC Dimming, Ultrasonic Fingerprint, and Telemacro Technology Explained

In-depth Analysis of the Xiaomi Redmi K80 Series: DC Dimming, Ultrasonic Fingerprint, and Telemacro Technology ExplainedXiaomi Redmi recently released the first Q&A session for its K80 series, addressing user inquiries about the new phone's screen dimming solution, ultrasonic fingerprint sensor, and camera configuration. This article delves into these key technologies, providing a comprehensive understanding of the Redmi K80 series' innovations

In-depth Analysis of the Xiaomi Redmi K80 Series: DC Dimming, Ultrasonic Fingerprint, and Telemacro Technology Explained

Xiaomi Redmi recently released the first Q&A session for its K80 series, addressing user inquiries about the new phone's screen dimming solution, ultrasonic fingerprint sensor, and camera configuration. This article delves into these key technologies, providing a comprehensive understanding of the Redmi K80 series' innovations.

I. OLED DC Dimming: A New Level of Eye Protection

Many users are concerned about the eye-protection capabilities of OLED screens with DC dimming, and how it differs from LCD DC dimming. The Redmi K80 series utilizes DC dimming technology, which has been proven through ergonomic testing to significantly reduce eye strain compared to PWM dimming under the same conditions. Test results show improvements in tear film break-up time, intraocular pressure, and blink frequency/duration after prolonged use, highlighting its superior eye protection capabilities.

DC dimming (Direct Current Dimming) directly controls screen brightness by adjusting the current, mirroring the principle used in LCD screens. Unlike PWM dimming (Pulse Width Modulation), which controls brightness by adjusting the on/off time ratio of pixels, DC dimming directly adjusts the current of the EL device, eliminating the flicker associated with PWM dimming and thus reducing eye strain.

A major highlight of the Redmi K80 series is its implementation of default full-brightness DC dimming. However, full-brightness DC dimming is extremely challenging, prone to "mura" (uneven screen illumination) at low brightness. To overcome this, Redmi set the goal of default full-brightness DC dimming from the initial screen planning stage. By optimizing pixel drive signals, scanning signals, and pixel capacitance, more precise current control matching was achieved.

Furthermore, Redmi implemented meticulous control over materials and processes, optimizing the lifespan of etched circuits, the proportions of film materials, the coating process, and the ELA light path. This ensures uniform screen illumination. A self-developed demura algorithm, based on an AI-constructed pixel large model, and higher optical inspection standards further enhance screen uniformity and display quality. Despite the near-doubled cost, Redmi remained committed to this approach, ensuring the K80 series displays excellent screen performance at full brightness, providing users with a truly comfortable and reliable eye-protection experience.

II. Ultrasonic Fingerprint Recognition: The Perfect Blend of Security and Speed

The Redmi K80 series features ultrasonic fingerprint recognition technology, significantly improving both security and unlock speed. This technology uses ultrasonic waves emitted by the phone to create a precise 3D fingerprint image based on the reflections from the ridges and valleys of the fingerprint. Compared to traditional optical fingerprint recognition, ultrasonic fingerprint recognition offers several advantages:

1. Enhanced Security: Ultrasonic fingerprint recognition stores a 3D image with richer details, imaging only the 3D structure. This effectively prevents 2D fake fingerprints, resulting in higher security.

2. Faster Unlock Speed: The richer detail information leads to higher recognition and comparison efficiency, resulting in faster unlock speeds. Tests show that the K80 Pro's screen-on and screen-off unlock speeds are 39% and 60% faster than the previous generation K70 Pro, respectively.

3. Improved Applicability: Ultrasonic waves have better transmission capabilities across different media, therefore providing better support for unlocking with wet fingers. Also, because it doesn't emit visible light, there's no glaring light spot during nighttime unlocking, enhancing user comfort.

III. Telemacro Lens: A New Perspective on the Microscopic World

The Redmi K80 series' telemacro lens has also garnered significant attention. Compared to conventional smartphone macro lenses, it offers distinct advantages:

1. Lower Distortion: Compared to ultra-wide-angle macro solutions, the telemacro lens exhibits lower distortion, producing images closer to what the human eye perceives.

2. More Suitable Focusing Distance: The 10cm focusing distance is more practical, allowing for detailed shots like pupil photos while maintaining a safe distance to avoid disturbing small animals or blocking light.

3. Higher Image Quality: Compared to main camera-cropped macro solutions, the telemacro lens offers significantly better image quality. The K80 Pro's 50MP floating telemacro lens can utilize its ultra-high pixel count for further magnification, revealing incredibly detailed images.

In conclusion, the Redmi K80 series offers comprehensive upgrades in display technology, fingerprint recognition, and camera systems, delivering a more comfortable, secure, and convenient user experience. These technological innovations not only demonstrate Redmi's continuous investment in R&D but also showcase its commitment to providing high-quality smartphones. Through this in-depth analysis of DC dimming, ultrasonic fingerprint recognition, and telemacro technology, users can gain a more comprehensive understanding of the Redmi K80 series' exceptional performance and make a more informed purchasing decision.