Abstract
We report a new mixture, which is modified from Merck TL-216, for liquid-crystal-on-silicon spatial light modulators (SLMs). To achieve 2π phase change at λ = 633 nm with 5 V operation voltage, the measured response time is about 3 ms at 50 °C. Meanwhile, our mixture exhibits no sign of photodegradation and even the total dosage has exceeded 400 MJ/cm2 at a blue laser wavelength λ = 465 nm. In comparison, E7 died at about 30 MJ/cm2. Widespread applications of this material for high brightness SLMs, near-eye displays, and head-up displays are foreseeable.
Highlights
Liquid crystals (LCs) have been widely used in display devices [1,2], such as augmented reality (AR) and virtual reality (VR) [3], tablets, computers, TVs, vehicle displays, and data projectors, to name a few
We have developed a new LC mixture, designated as UCF‐216, which is suitable for high brightness LCoS spatial light modulators (SLMs)
Under a blue laser ( = 465 nm) illumination, UCF‐216 shows no sign of degradation, even when the accumulated dosage exceeds 400 MJ/cm2
Summary
Liquid crystals (LCs) have been widely used in display devices [1,2], such as augmented reality (AR) and virtual reality (VR) [3], tablets, computers, TVs, vehicle displays, and data projectors, to name a few. The central wavelength is λ = 550 nm and the cell gap is controlled at 3 μm in order to obtain fast response time and high manufacturing yield Under such conditions, the required ∆n is approximately 0.1. For overcoming the vergence-accommodation conflict issue in AR and head-up displays [17] For such a spatial light modulator (SLM), the required phase change is 2π and the response time should be less than 4 ms to support the desired 240 Hz frame rate. PEER REVIEW decrease but different rates [22] The former helps to achieve fast response time, but the latter demands a slightly thicker cell gap or a higher birefringence at the room temperature.
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