Session Index

In this paper, we present the feasibility of compensation of color breaking in a holographic-optical-element based augmented reality (AR) display. We first build up a theoretic optical model of the AR display system to evaluate the color breaking of displayed white image from the user’s point of view. During the calculation, the color coordinate of each pixel of projected virtual image can be obtained. Therefore, based on those calculated results, we propose a color correction algorithm by applying a pre-compensation scheme to the R/G/B values of each display pixel. This method enables the full-color image in AR system applications.

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The vision correction for near-eye display by using an electrically tunable lens based on the spatially extended LC lens is demonstrated in this paper. For the first time, we found that the spatially extended LC lens shows the spatially distribution in lens power ranging from +3.25D to -3.25D. The surprising results give LC lenses an insightful aspect and overrule the traditional statement of the limitation of lens power set by the optical phase difference in gradient-index LC lenses. It also paves a way in ophthalmic applications.

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In this study, the proposed near-eye display (NED) system is composed of two holographic waveguides with wavelength multiplexing. Each holographic waveguide is designed to offer half FOV for the whole system. After combination of these two waveguides, rhe NED system FOV can reach 50°×20.71° (H×V).

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A Maxwellian-view display based on HOE with large FOV is proposed. The HMD system can provide information from mask and image will not defocus when observer focus on different distance. The FOV of the demonstration system can reach 39.38 °×56.83° (H×V).

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In this study, the research topic is the electrically tunable focusing large aperture liquid crystal lens with three-zone and three-dimensional curved electrodes. The three-dimensional curved electrodes are designed by separating the ideal phase profile into three zones according to the structures of Fresnel lenses, and the optical path difference between any two adjacent zones of the three-dimensional electrode is an integer multiple of 2π. The performances of the LC lens, such as the electrically tunable focus, response time, and others, are also discussed.

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We demonstrate a single-shot and image-based polarization detection system for material recognition. The stokes parameters are measured under a single-shot measurement using 4 electrically tunable liquid crystal wave plates, 4 polarizers and 4 camera modules. The optical principle is introduced and the experiments are performed. We also use a metallic plate and a glass substrate to demonstrate the material recognition. The impact of this study is to provide a practical way in image-based polarization detection in Advanced Driver Assistance Systems for material recognition which could help in driving safety.

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In this research, we demonstrated a red-orange organic light emitting diode (OLED) through solution
process by incorporating a novel synthesized thermally activated delayed fluorescence (TADF) emitter. By
optimizing the thermal annealing duration of emitting layer, the maximum current efficiency of 0.83 cd/A, emission
peak wavelength of 590 nm and CIE coordinates of (0.49, 0.45) can be achieved.

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In this research, a novel green thermally activated delayed fluorescence organic lighting-emitting diode(TADF) material based on Carbazole-derivative was synthesized and employed as high efficiency organic light-emitting diode (OLED). By using the 4CzIPN doped in the new green TADF host, maximum external quantum efficiency (EQE) reached 10.44% with CIE coordinates of (0.2792, 0.5784).

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In this research, a new triplet-triplet annihilation (TTA) emitter based on pyrene derivative was synthesized and employed as the host material for high efficiency blue organic light-emitting diode (OLED). By optimizing the dopant concentration of fluorescent emitter in the emitting layer (EML), the maximum external quantum efficiency (EQEmax) of 6.93% with CIE coordinates of (0.136, 0.192) can be achieved. The time-resolved electroluminescence measurement revealed that the highest delayed emission ratio of 20% contributed to device efficiency.

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In our research, we design three gratings to realize the AR glasses at wavelength 520nm. Besides that, we optimize the structure of grating to obtain uniform output efficiency. However, slant grating is difficult to fabricate through photolithography. To solve this problem, metagrating is a way to deal with it. By using double patterning technique, we succesfully build a metagrating which critical dimension reaches 50nm via KrF scanner.

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The aim of this study was to construct a high quality and compact floating projection system using several free-form reflectors to achieve the floating effect and correct for aberrations. The system is 13cm x 12cm x 14cm and can float an image of approximately 8cm. The final evaluation of the image quality in terms of MTF and aberration has proven that the system can achieve a high-quality floating display.

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