Impact of high-resolution matrix backlight on local-dimming performance and its characterization

Abstract

In this paper, the general aspects of backlight unit design are considered as a whole. A new key parameter for BLU design, the FWHM to pitch ratio, is introduced and a reasonable value will be proposed. In addition, a new procedure for the uniformity analysis of direct-lit BLUs will be introduced, which is necessary due to the upcoming high-resolution matrix backlight. The aspects and challenges of local-dimming of high-resolution BLUs will be described and amended solutions for excellent results will be proposed. In the last section, new metrics for performance evaluation are introduced.

Physically Detachable and Operationally Stable Cs2SnI6 Photodetector Arrays Integrated with µ‐LEDs for Broadband Flexible Optical Systems

“…In principle, the cross‐talk can be technically improved by adopting standard technologies in flat panel displays (FPDs) such as black matrix or electrical local‐dimming technologies during operation of the backlight. [ 83 ] For practical impacts, the detachable perovskite PD‐arrays with the compatibility of a modular assembly approach can be practically extended toward monolithic optical wireless interconnection in the advanced Si‐based system hybridized with the PDs electronics.…”

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].…”

Dynamic Backlights for Automotive LCDs

“…A hardware implementation for a few hundred LEDs may comprise 1 Mbit of SRAM and 400K NAND gate equivalents. The SSC local‐dimming algorithm has been amended, 3 so that the results are still close to the optimum, while the hardware costs have only moderately increased.…”

“…During the night, the brilliance of an image will provide a very strong impression to the driver, which is not just a matter of contrast ratio, but depends also on the size of the black area. One measurable quantity is the share of black pixels in the image, as introduced in an upcoming IMID paper by two of the authors and their colleagues 4 . For a very high resolution like 80 × 30 LEDs, it can be expected that an OLED‐like visual quality will be achieved.…”