Dynamic Backlights for Automotive LCDs

Abstract

LCDs in vehicles need to demonstrate high luminance and resolution while also saving on power usage – two features that may seem mutually exclusive. One solution is a local‐dimming matrix backlight, which can significantly improve the visual quality of automotive LCDs while also conserving power. This approach, combined with emerging micro/miniLED technology, should help make industrial implementation of higher quality automotive LCDs more feasible.

61‐2: Invited Paper: ShyTech Displays High resolution Displays Hidden Behind Decorative Surfaces

“…In addition, the next generation of matrix local dimming backlight with a higher resolution of LED matrix will offer an even better power saving rate because the increased number of LEDs will better match the image and illuminate fewer surrounding pixels. Consequently, high resolution BLU would positively influence both, the contrast and the power saving rate [5,6].…”

Enhancing a Display’s Sunlight Readability with Tone Mapping

“…At the 2023 SID Automotive Displays conference, BOE demonstrated an 800-nit 42.2″ curved mLCD integrated infotainment display prototype, featuring 1439 local dimming zones. In addition, innovative approaches, such as advanced backlight driving algorithms, tailored mini-LED light spread function (LSF), and liquid crystal layer optimization, are able to further increase the backlight uniformity [15][16][17], reduce the power consumption [18], and mitigate the undesirable halo effect [19]. Despite these advancements, the LCD panel transmittance is often below 10% due to significant losses from polarizers, opaque thin-film transistors, and color filters, which in turn limit the peak brightness.…”