{"title":"液晶平板显示器","authors":"M. Hareng, S. Le Berre","doi":"10.1109/IEDM.1978.189401","DOIUrl":null,"url":null,"abstract":"We present here a new principle of flat panel using a smectic A liquid crystal. It is a \"passive\" matrix working in a thermoelectric mode : at rest, the liquid crystal is transparent while is strongly scatters the light when it is heated by mean of one set of electrodes ; but if an electric field is applied on the liquid crystal, the intensity of the scattered light, decreases. We showed on a prototype that the addressing time of a line can be 60/us or less ; the relaxation times of the liquid crystal for both transitions transparent → scattering and the reverse is less than 2ms. So the frame change time can be adjust from 30ms to several seconds depending on the application. This smectic A matrix display which is simple to realize -as the \"passive\" matrices- presents characteristics for the contrast ratio, the resolution and the response times which, were only obtained with active matrices.","PeriodicalId":164556,"journal":{"name":"1978 International Electron Devices Meeting","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":"{\"title\":\"Liquid crystal flat display\",\"authors\":\"M. Hareng, S. Le Berre\",\"doi\":\"10.1109/IEDM.1978.189401\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We present here a new principle of flat panel using a smectic A liquid crystal. It is a \\\"passive\\\" matrix working in a thermoelectric mode : at rest, the liquid crystal is transparent while is strongly scatters the light when it is heated by mean of one set of electrodes ; but if an electric field is applied on the liquid crystal, the intensity of the scattered light, decreases. We showed on a prototype that the addressing time of a line can be 60/us or less ; the relaxation times of the liquid crystal for both transitions transparent → scattering and the reverse is less than 2ms. So the frame change time can be adjust from 30ms to several seconds depending on the application. This smectic A matrix display which is simple to realize -as the \\\"passive\\\" matrices- presents characteristics for the contrast ratio, the resolution and the response times which, were only obtained with active matrices.\",\"PeriodicalId\":164556,\"journal\":{\"name\":\"1978 International Electron Devices Meeting\",\"volume\":\"7 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1900-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"5\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1978 International Electron Devices Meeting\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IEDM.1978.189401\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1978 International Electron Devices Meeting","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEDM.1978.189401","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
We present here a new principle of flat panel using a smectic A liquid crystal. It is a "passive" matrix working in a thermoelectric mode : at rest, the liquid crystal is transparent while is strongly scatters the light when it is heated by mean of one set of electrodes ; but if an electric field is applied on the liquid crystal, the intensity of the scattered light, decreases. We showed on a prototype that the addressing time of a line can be 60/us or less ; the relaxation times of the liquid crystal for both transitions transparent → scattering and the reverse is less than 2ms. So the frame change time can be adjust from 30ms to several seconds depending on the application. This smectic A matrix display which is simple to realize -as the "passive" matrices- presents characteristics for the contrast ratio, the resolution and the response times which, were only obtained with active matrices.
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