P‐65: Strategic Realization of the Highest Possible Pixel Density for Quantum Dot Color Converter with Optimized Performance

Abstract

The light extraction efficiency of QDCC (quantum dot color converter) is low when its aspect ratio (width to thickness ratio) of a subpixel is less than two, which causes the problem in their high‐resolution applications. Using QDPR (quantum dot photoresist) of high OD (optical density) values and PenTile subpixel arrangement, an apparent high‐resolution application is feasible, in which the QDCC film thickness is less than 2 μm. Further incorporation of yellow color filter film or color purified layer (CPL) on the QDCC film can optimize its optical performance. Theoretically, QDCC with pixel density over 3000 ppi is achievable when it is directly applied to the CMOS substrate. In a trial test QDCC is applied on a glass substrate, which results in pixel density of 2116 ppi and color gamut of NTSC 109.64%.

InGaN-based Blue Resonant Cavity Micro-LED Combined with Red-Green-Yellow Quantum Dot Color Conversion Layer for Wide Color Gamut and Energy- Efficient Full-Color Displays

“…The developed full-color micro RCLED signi cantly improved light leakage and utilized RGBY four-color pixels, showcasing a full-color display with low energy consumption, high color purity, and a wide color gamut area. [3,5,9,24]…”

“…To further reduce blue light leakage, a color lter (CF) can be added on top of the QD CCL, replacing the commonly used DBR, as the production cost and required thickness of DBR are relatively high. [24] Replacing it with a CF can reduce module thickness, bene ting applications in slim or wearable devices. With these enhancements in display performance, we propose a novel full-color display module design utilizing blue RCLED combined with RYG QD CCL, incorporating a four-color full-color display array.…”

Optimizing Peak Light-Emitting-Diode (LED) Wavelengths for Enhanced Color Performance and Visual Health in Blue Micro-LED Displays with Color-Conversion Layers

“…27 This means that the CF is a better solution to blue leakage than the DBR for most QD color-conversion-based micro-LED displays. 28 The current blue leakage method of filtering QDCCs with a CF is divided into a green QDCC (G-QDCC) and a red QDCC (R-QDCC), both using a yellow color filter (Y-CF) or G-QDCC and R-QDCC with a green color filter (G-CF) and a red color filter (R-CF), respectively. Nevertheless, whether the CF uses Y-CF or G-CF, light begins to penetrate near the 470−475 nm wavelength (as shown in Figure 2).…”

“…First, it improves the transmittance brightness of QD emission. 28 Second, it reduces the manufacturing cost associated with one CF process step. 28 This research systematically compares the differences between three different wavelengths of blue light upon excitation of the G-QDCC and R-QDCC.…”

“…28 Second, it reduces the manufacturing cost associated with one CF process step. 28 This research systematically compares the differences between three different wavelengths of blue light upon excitation of the G-QDCC and R-QDCC. The primary purpose is to analyze the impact of the long-wavelength 460 nm blue light, the mainstream short-wavelength 450 nm blue light, and the other shorter-wavelength 437 nm blue light on the external quantum efficiency (EQE), brightness, chromaticity, and color gamut of the current QDCC with a CF structure.…”