Introduction: BOE's flexible OLED FDC technology adopts a 1-to-1 pixel circuit, meaning that one pixel circuit drives one OLED pixel unit.
On August 9th, BOE announced the launch of its new generation of flexible OLED true 400PPI FDC (Full Display with Camera) under-display camera technology. Unlike the "one-drive-multiple" pixel circuit design on the market, BOE's FDC under-display camera technology adopts a one-drive-one-pixel circuit design. The FDC camera area is indistinguishable from the surrounding screen display, and there are no fine lines or misalignments at the edge of the camera area.
In addition to its superior panoramic display effect, FDC's imaging performance has reached the forefront of the industry and has been applied to the under-display camera models of leading mobile phone manufacturers, becoming a trendsetter for the development of under-display camera technology in the industry.
FDC technology refers to a solution that eliminates the traditional punch-hole for the front-facing camera, embedding it beneath the display screen. Compared to current notch or waterdrop screens, it achieves a true full-screen display without any visible holes.
Currently, there are two common solutions for under-display camera technology in the industry: one is to reduce the number of pixel units in the camera area without changing the pixel density of other areas, thereby increasing the aperture ratio, increasing visible light transmittance, and improving image quality—the "low PPI solution" for the camera area. This results in a significant difference between the FDC area and the surrounding screen, with noticeable pixelation, especially when using navigation, where roads may appear misaligned. Furthermore, due to the uneven PPI, the FDC area is more easily seen at wide viewing angles.
Secondly, while keeping the overall pixel unit density unchanged, the camera area is set up to drive multiple OLED pixel units with one pixel circuit, reducing the area ratio of metal traces and increasing the visible light transmittance of the FDC area to meet the photography requirements—that is, the solution of reducing the driving circuit in the camera area, which will also reduce the amount of real pixel information that can be displayed in the FDC area.
In fact, all 1-drive multi-pixel circuit solutions (whether 1-drive 2 or 1-drive 4) suffer from some grayscale loss, resulting in a reduction in pixel information. For example, with a 1-drive 4-pixel circuit solution, the actual pixel information in the FDC (Field-DC) area will be reduced to 1/4 of the original. Therefore, there will still be a significant difference between the FDC area of this solution and the display of the surrounding screen.
While this approach can achieve the same PPI as the normal area, because several pixels are lit simultaneously, its image quality is equivalent to that of a low PPI approach.
BOE's flexible OLED FDC technology adopts a 1-to-1 pixel circuit, meaning one pixel circuit drives one OLED pixel unit. This solution improves visible light transmittance and increases the amount of light entering the under-display camera by optimizing the pixel spatial arrangement and film layer stacking design in the camera area without reducing the pixel density or the number of pixel driving circuits. This enhances the photo quality and achieves a true full-screen display with high resolution and seamless integration.
Meanwhile, based on powerful optical simulation capabilities, the circuit and backplane design were further optimized, and the shape of the pixel unit was optimized to minimize the degree of light diffraction, reduce glare, and significantly improve imaging resolution. Combined with the terminal's yellowing removal algorithm and diffraction AI algorithm, it truly achieves both excellent display and shooting performance.
Finally, BOE's brightness compensation algorithm can improve screen lifespan by 50% and ensure the mass production capability of this technology, which is conducive to its future promotion to more product platforms and consumer usage scenarios, such as under-display structured light for facial recognition.
