Deep Controllable Backlight Dimming for HDR Displays

Abstract

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79‐4: Efficient Deep Learning‐based Backlight Extraction for Local Dimming Display

“…To evaluate the local dimming display performance, we used the amount of power consumption of the backlight units, maximum and minimum luminance values of the perceived image 𝑋 9 %, , i.e., 𝐿 213 , 𝐿 2&4 and CR, structural similarity index measure (SSIM) and peak signal-to-noise ratio (PSNR) as the objective measures. In addition to the baseline DNN method in [7], we implemented…”

“…A controllable backlight dimming method using a DNN has been introduced in [7]. For a display panel having the number of backlight light-emitting diodes (LEDs) of 𝐻 !…”

“…In recent years, deep neural network (DNN)-based algorithms with strong nonlinear modeling capabilities have found diverse applications, showing remarkable performance. Regarding the local dimming display techniques, a controllable backlight dimming method has been introduced in [7], where the authors propose to use a user-provided power control parameter to manually reduce the power consumption of the backlight units. In [8], DNN-based pixel compensation methods have been introduced, while using a traditional BLE algorithm.…”

Impacts of Local Dimming Algorithms on the Halo Effect in LCD With Local Dimming Mini-LED Backlight

“…The discontinuity in BL between the adjacent region may lead to a distortion of the displayed image. Therefore, various local dimming algorithms have been employed to determine the BL values and pixel compensation [1], [13], [14], [28], [29], [30]. Due to the uneven distribution of BL and light leakage from the liquid crystal panel [3], [4], [31], the halo effect seriously affects the performances of LCD employing local dimming mini-LED backlight.…”

Luminescence Enhancement of K2LiAlF6:Mn4+ Phosphors by Zn2+-Mediated Charge Compensation for Fast-Response Backlighting Applications

“…Mini-light-emitting diodes (Mini-LEDs) are novel devices for display terminals such as TVs that can adjust the local brightness of the screen dynamically, especially in dark areas, to achieve a high contrast similar to organic LED (OLED) screens. − However, the rapid transition between light and dark regions poses a challenge for the response speed of phosphors assembled on the Mini-LEDs. − As Figure a shows, the Mini-LEDs are so small and dense that they cannot use lenses to smooth out light distribution. As a result, when the screen displays a video with a moving white circle on a black background, as in Figure b, there is uneven brightness and darkness at the border of the circle.…”