46‐1: Patterned Glass Diffuser (PGD) for MiniLED Backlights

Abstract

We report on a monitor‐sized, thin, dimensionally and thermally stable mini‐LED backlight enabled by a patterned glass diffuser (PGD). Our backlight has a luminance of between 0.9 × and 1.05 × compared to a reference mini‐LED backlight using a thick diffuser plate, while providing a better local dimming control and comparable zone and panel luminance uniformity and color uniformity. The PGD technology can reduce the number of LEDs.

64‐3: Patterned Glass Diffuser for MiniLED Count Reduction

“…The color difference E is smaller than 2 and the ratios are close to 1. These results are very similar to those [16] for the backlights shown in Figure 1 and Figure 2. LED pattern visibility: The Fourier transform is known to analyze pattern visibility [17].…”

“…There is a tradeoff between increasing LED pitch and reducing local dimming control, independent of whether the PGD is used. For the same LED pitch, the PGD based mini-LED backlight shows better local dimming control than the reference mini-LED backlight when LEDs are set to alternating ON and OFF states [16].…”

“…We reported the use of a patterned glass diffuser (PGD) in a mini-LED backlight to reduce the total thickness while maintaining the luminance and uniformity [16]. In this paper, we report the use of the PGD to reduce the LED count while maintaining the total thickness, resulting in cost savings.…”

“…As discussed previously[16], we have already built an optics model for the entire PGD based backlight for LED pitches 𝑃 𝑥0 and 𝑃 𝑦0 . A mirror boundary condition is used around a single LED zone.…”

64‐2: Ultra‐Thin RGB Mini‐LED Backlight for High‐end Professional Liquid Crystal Displays

“…Direct Mini-LED (MLED) BLU could obtain HDR, but its thickness mainly depends on the diffusor plate (DP) thickness, optical distance (OD) and other function films [11][12], such as diffusor, prism and so on. In order to reducing the thickness of BLU, optical designs and research works [13][14][15] are focusing on reducing DP thickness or combination few functions films into one, such as prism with diffusor effects, prims on prism (POP) etc. Glass-based MLED BLU [16] is proposed by LCD factories thanks to its mature glassbased semiconducting technologies.…”