Under-Display Camera Transmittance Enhancement Solutions: In-Depth Analysis of New Materials and Arrangement Technology

As full-screen smartphones become more prevalent, under-display camera technology has emerged as a focal point in the industry. The core of current technological advancements is to enhance camera transmittance while maintaining the integrity of the screen. This article will delve into the latest solutions from both the application of new and pixel arrangement technology.

Traditional screens consist of multiple layers, including pixel units, substrates, color filters, through which light must pass to reach the camera sensor. However, the emission layer and blocking layer of OLED screens absorb some of the light, resulting a transmittance of only 30%-40%, directly affecting image quality. Therefore, to enhance transmittance, breakthroughs are needed in both and structural design.

Transparent OLED Technology: In traditional OLED screens, metal electrodes block light. transparent OLEDs replace metal electrodes with indium tin oxide (ITO) and optimize the emission layer materials, increasing transmittance to 60%-70%. For instance, Samsung's latest "ClearView" technology uses nano-transparent electrodes and high-transmittance packaging materials to provide a clearer path for the camera area while maintaining screen brightness.

Nanoscale Optical Coating: By covering the screen surface with a nanoscale silicon dioxide or oxide coating, light reflection can be reduced and transmittance enhanced. Tests by Huawei's laboratory show that this technology can improve transmittance by 8%-12%, while also offering fingerprint resistance and scratch-proof performance.

Micro Lens Array: Embedding a micro lens array between the screen and sensor can dispersed light onto the sensor. Apple's patent shows that MLA technology can increase effective transmittance by more than 20%, significantly improving imaging, especially in low-light environments.

Checkerboard Arrangement (Check Pattern): Traditional "diamond arrangement" changes to alternating black and white pixels in the screen-under area, reducing the area of the blocking layer. Xiaomi MIX adopts this scheme, which increases transmittance to 55%, but there is a problem of resolution decrease.

Honeycomb Transparent Hole Design: V's "Invisible Screen" technology uses a hexagonal transparent hole array, increasing transmittance area while maintaining pixel density. Coupled with a dynamic pixel algorithm, transmittance can reach 65% and support 4K resolution display.

Dynamic Pixel Adjustment Technology: Qualcomm's "Clear Sight system can automatically adjust the pixel state in the camera area according to ambient light: the emission layer is turned off and the transmittance mode is turned on when taking, and the display returns to normal when not taking photos. Test data show that this technology can instantly increase transmittance to 80%, but it requires-performance driving chip support.

Sensor Sensitivity Upgrade: New generation sensors like Sony's IMX989 improve light by 30% through four-pixel merging technology, indirectly alleviating the problem of insufficient transmittance.

Under-Display Optical Path Design: OO's "Light Path" technology uses refraction prisms to guide light to the side sensors, bypassing screen obstructions, achieving more than 90 transmittance, but it requires redesigning the body structure.

At present, the industry's highest transmittance has exceeded 75%, but there is still a to address the balance between screen brightness and transmittance. In the future, the application of quantum dot materials and flexible sensors may further enhance performance. However, cost and mass production stability remain key barriers to technology implementation.

The improvement of the transmittance of the under-screen camera is a comprehensive achievement of materials science optical design, and algorithm optimization. With technology iteration, full-screen mobile phones are expected to achieve more than 90% transmittance by 2026, truly eliminating the visual fragmentation of the "hole-punch screen".