Fine pixel size and high-resolution liquid crystal on silicon (LCoS) backplanes have been developed by various companies and research groups since 1973. The development of LCoS is not only beneficial for full high definition displays but also to spatial light modulation. The high-quality and well-calibrated panels can project computer generated hologram (CGH) designs faithfully for phase-only holography, which can be widely utilized in 2D/3D holographic video projectors and components for optical telecommunications. As a result, we start by summarizing the current status of high-resolution panels, followed by addressing issues related to the driving frequency (i.e., liquid crystal response time and hardware interface). LCoS panel qualities were evaluated based on the following four characteristics: phase linearity control, phase precision, phase stability, and phase accuracy.A phase-only spatial light modulator can be used as a key optical element for displays, adaptive optics for sensing, lithography, and telecommunication, as shown in Figure 2. The linearity of phase modulation, response time, phase precision, and phase stability are key characteristics for appraising or selecting phase-only LCoS-SLM panels for the applications designed. However, it is difficult to obtain a single LCoS possessing all the desired features for all applications. Their specification and performance optimization are application-driven. For example, response time is the current limitation in a holographic display. It may be more important than phase stability,
The low heavy metal and heavy metal free QDs (Cd < 100 ppm, Pb‐free) content of the R, G, B‐QDs was deposited on top of the conventional twist nematic (TN) liquid crystal device to improve the viewing angle of liquid crystal display. The non‐vacuum, low materials consumption solution process by aerosol‐jet deposition has the advantage of direct printing on black matrix pattern glass. The intensity of 410 nm was applied to execite the QD film and was modulated by the TN cell. As a result, the LC retardation and response time can be fully optimized within the small cell gap. In particular, the eco‐QD array TNLCD possesses wide viewing angle, high transmittance, and fast response time (< 3 ms) under low driving voltage (4 V).
The 3 ms response time of 1080p LCoS panel filled with new NCTU‐PCM‐2‐01 nematic LC was assembled and evaluated in this study. The cell gap uniformity error is below 1.0 %. The response time is 5 times, at least, faster than current commercial full phase modulation LCoS panels. Non‐desired LC deformation phenomenon was suppressed in the reported panel. The reconstructed 3D holographic images of the triangular pyramid with different rotational angles were prepared and demonstrated.
A 4,000 PPI phase-only NCTU PCU-3-01 LCoS-SLM filled with UCF-L1 NLC was assembled and evaluated. The resulting LCoS panel possessed 1.6 ms of linear-full-phasemodulation response time under digital driving (V w = 4.5 V, V b = 0.3 V) at T = 45 o C. The 3D holographic images show that most diffracted light is transferred within 2 ms. Meanwhile, a low-latency driver solution based on 1920 x 640 at 240Hz (equivalent to 4000 PPI) input frame rate and 720 Hz data frame rate were presented.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.