The visual features of continuous pseudocolor encoding is discussed and the optimiz- ing design algorithm of continuous pseudocolor scale is derived.The algorithm is restricting the varying range and direction of ligh...The visual features of continuous pseudocolor encoding is discussed and the optimiz- ing design algorithm of continuous pseudocolor scale is derived.The algorithm is restricting the varying range and direction of lightness,hue and saturation according to correlation and naturalness,automatically calculating the chromaticity coordinates of nodes in uniform color space to get the longest length of scale path,then interpolating points between nodes in equal color differences to obtain continuous pseudocolor scale with visual uniformity.When it was applied to the pseudocolor encoding of thermal image displays,the results showed that the correlation and the naturalness of original images and cognitive characteristics of target pattern were reserved well;the dynamic range of visual perception and the amount of visual information increased obviously;the contrast sensitivity of target identification improved;and the blindness of scale design were avoided.展开更多
Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,cu...Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,customized patterns,and flexibility remains challenging.In this study,we report inkjet-printed,flexible,and patterned ECDs based on two-dimensional(2 D)polyaniline(PANI)sheets,which are evenly dispersed in formic acid(FA)enabling high-precision,stable inkjet printing.The pristine lamellar structure of PANI sheets,which combine nanoscale thickness and an appropriate doping ratio,and the additive-free ink composition endow the printed PANI electrodes and ECDs with high performance.The fabricated PANI electrode exhibits a high optical contrast(76%at a wavelength of 750 nm),a good coloration efficiency(CE)of 259.1 cm^(2) C^(-1),and a short coloration/bleaching time(1.8/2.4 s),simultaneously integrated with pseudocapacitance and mechanical flexibility.Moreover,the 2 D lamellar PANI ink developed in this study can be printed into various designed patterns,particularly for electrochemically controlled,addressable electrochromic displays.This work highlights 2 D lamellar PANI as a promising electrochromic material for flexible and patterned ECDs.展开更多
文摘The visual features of continuous pseudocolor encoding is discussed and the optimiz- ing design algorithm of continuous pseudocolor scale is derived.The algorithm is restricting the varying range and direction of lightness,hue and saturation according to correlation and naturalness,automatically calculating the chromaticity coordinates of nodes in uniform color space to get the longest length of scale path,then interpolating points between nodes in equal color differences to obtain continuous pseudocolor scale with visual uniformity.When it was applied to the pseudocolor encoding of thermal image displays,the results showed that the correlation and the naturalness of original images and cognitive characteristics of target pattern were reserved well;the dynamic range of visual perception and the amount of visual information increased obviously;the contrast sensitivity of target identification improved;and the blindness of scale design were avoided.
基金supported by the International Cooperation Fund of the Science and Technology Commission of Shanghai(19520744500)the National Natural Science Foundation of China(51903045 and 52173031)+3 种基金the Program of Shanghai Academic/Technology Research Leader(20XD1400100)the Basic Research Project of the Science and Technology Commission of Shanghai(21JC1400100)the Fundamental Research Funds for the Central UniversitiesGraduate Student Innovation Fund of Donghua University(CUSF-DH-D-2020048)。
文摘Conjugated organic polymer(COP)-based electrochromic devices(ECDs)exhibit promising applications in digital and color displays.However,fabricating COP-based ECDs integrated with excellent electrochromic performance,customized patterns,and flexibility remains challenging.In this study,we report inkjet-printed,flexible,and patterned ECDs based on two-dimensional(2 D)polyaniline(PANI)sheets,which are evenly dispersed in formic acid(FA)enabling high-precision,stable inkjet printing.The pristine lamellar structure of PANI sheets,which combine nanoscale thickness and an appropriate doping ratio,and the additive-free ink composition endow the printed PANI electrodes and ECDs with high performance.The fabricated PANI electrode exhibits a high optical contrast(76%at a wavelength of 750 nm),a good coloration efficiency(CE)of 259.1 cm^(2) C^(-1),and a short coloration/bleaching time(1.8/2.4 s),simultaneously integrated with pseudocapacitance and mechanical flexibility.Moreover,the 2 D lamellar PANI ink developed in this study can be printed into various designed patterns,particularly for electrochemically controlled,addressable electrochromic displays.This work highlights 2 D lamellar PANI as a promising electrochromic material for flexible and patterned ECDs.
