P‐181L: Late‐News Poster: Color Sequential Front‐Lit LCOS for Wearable Displays

Abstract

A color sequential front-lit (CS-FL) LCOS optical design, which brings advantages of wide color gamut, high resolution, and high contrast for wearable applications, is presented. On the basis of our recent color filter front-lit (CF-FL) LCOS experimental result, which delivers 100 nits/mW (i.e., 17,000 nits at 30 mA driving current of a dual-chip LED), we demonstrated a new CS-FL design of 116 nits/mW using RGB LED and converted green phosphor. The color non-uniformity problem caused by separated individual RGB LED chips was solved by a hollow integrator rod and a sheet of diffuser. Furthermore, together with a mixer light guide (MLG) with grating, spatially averaged RGB light can have a much collimated angular intensity and uniform illuminance distribution to PBS light guide (PBSLG). Besides, the color luminance non-uniformity (standard deviation of color difference) of this newly designed CS-FL can reduced 11% compared to that of the original CF-FL.

60‐1: Invited Paper: Emerging microdisplay technologies for AR/VR applications

“…A big challenge for LCoS is to reduce its form factor, which is critically important for AR glasses. To realize this goal, Himax has developed a front-lit LCoS [19]. A key element in the frontlit LCoS is a flat plate (lightguide) placed on top of the LCoS module.…”

Waveguide-based augmented reality displays: perspectives and challenges

“…LCoS utilizes the voltage-induced liquid crystal reorientations to modulate the polarization state of the incoming light, while using the pixelated metallic mirrors to reflect the modulated light. Pixelated reflectance can be obtained via converting the phase retardation to amplitude modulation after passing through the analyzer or polarizing beam splitter (PBS) [15]. Different from LCoS, DLP relies on the tilting micromirrors to steer the incident light to two different directions corresponding to the on-and off-states.…”

A Novel ReRAM-Based Architecture of Field Sequential Color Driver for High-Resolution LCoS Displays

“…These latency results were obtained by applying the write EDP optimization to the simulator that adopts the simulation parameters in [37]. The frame rates were calculated following Equation (3), (4), (5), and (6).…”