Since 1979, liquid crystal lenses have been a target of perfect parabolic lenses. However, the constraints of the so-called power law coming from the physics and chemistry of nematic LC limit the development in large-aperture GRIN LC lenses. In this study we present electrically tunable progressive lenses utilizing nematic liquid crystals (LC). The proposed LC lens is capable of dynamically adjusting its focal length, functioning as either a positive or negative lens. Our findings reveal that the spatial distribution of lens power within the progressive LC lens, ranging from +4D to -3D, far surpassing the range of -0.87D to +0.87D which one may expect within the parabolic wavefront approximation. For a lens with a 30 mm aperture a total tunable range is 7.6 D (from +5.6D to -2D) which is 4.75 times larger than the traditional parabolic prediction~1.6D (from +0.8D to -0.8D). This study not only challenges conventional limitations set by optical phase differences in gradient-index LC lenses but also paves the way for transformative advancements in optics and beyond.
This work presents a breakthrough in the development of high-resolution virtual reality (VR) displays of 2117-pixels per inch (PPI) liquid crystal displays (LCDs). This technology significantly improves the dynamic range and reduces the screen door effect in VR displays. The challenges and potential solutions for achieving over 2000-PPI LCDs, including the design of the aperture ratio of pixels, improvements in LC efficiency, and overall transmittance, are discussed. Moreover, the use of mini-light-emitting diode backlight and low-power solutions to maintain the image quality in high-resolution designs are also proposed.
An improved light field VR display is introduced, featuring an ultra-high-pixel density liquid crystal display with a resolution of 3.1 in. and 1411 PPI. By utilizing a 3K3K resolution display panel, this optimized display enhances the field of view and provides a more immersive experience. Furthermore, it incorporates advanced functions, such as vision correction (without the need for glasses), reduced vergence-accommodation conflict, and an enlarged eye box with eye tracking technology.
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