The random depolarization film (RDF), a polymer film doped with birefringent microparticles, solves polarization problems of displays. To design the RDF that realizes sharper images, the optimal dopant particle size and suitable display's pixel size were investigated based on modulation transfer function (MTF) measurements. The MTFs indicated that the dopant particle size of the RDF and the pixel size of the display should be larger to prevent the sharpness degradation.
{"title":"38‐3: Design of Random Depolarization Films Based on Modulation Transfer Function Measurements","authors":"Shizuki Sasaki, Kenichiro Masaoka, Y. Koike","doi":"10.1002/sdtp.16615","DOIUrl":"https://doi.org/10.1002/sdtp.16615","url":null,"abstract":"The random depolarization film (RDF), a polymer film doped with birefringent microparticles, solves polarization problems of displays. To design the RDF that realizes sharper images, the optimal dopant particle size and suitable display's pixel size were investigated based on modulation transfer function (MTF) measurements. The MTFs indicated that the dopant particle size of the RDF and the pixel size of the display should be larger to prevent the sharpness degradation.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49596270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Young Wook Kim, Do-Hyeon Choi, Jun Hee Lee, Dong-Jin Lee, GwangTae Kim, Jeong-Ki Park
In this paper, we propose specular‐free (SF) surface to provide excellent image quality under a bright environment. By optimizing the anti‐glare (AG) layer and low‐reflection layer, specular reflection and diffuse reflection reduced up to 78% and 25%, respectively, compared to conventional AG. Using a SF technique, it is possible to remove the inconvenience of glare and improve the perceptual image quality.
{"title":"87‐4: Invited Paper: Specular‐Free Surface for Excellent Image Quality under a Bright Environment","authors":"Young Wook Kim, Do-Hyeon Choi, Jun Hee Lee, Dong-Jin Lee, GwangTae Kim, Jeong-Ki Park","doi":"10.1002/sdtp.16801","DOIUrl":"https://doi.org/10.1002/sdtp.16801","url":null,"abstract":"In this paper, we propose specular‐free (SF) surface to provide excellent image quality under a bright environment. By optimizing the anti‐glare (AG) layer and low‐reflection layer, specular reflection and diffuse reflection reduced up to 78% and 25%, respectively, compared to conventional AG. Using a SF technique, it is possible to remove the inconvenience of glare and improve the perceptual image quality.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49612466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper we present a novel multiplane computer generated hologram calculation approach that enables artifact free and realistic‐looking defocus blur for optical reconstructions in a holographic display. We introduce a new targeting method and a loss function that evaluates the focused and defocused parts of the reconstructed images. We demonstrate that our method is applicable to various standard hologram generation routines such for both iterative and non‐iterative CGH calculation methods. We also demonstrate our new gradient descent‐based optimization with double phase constraint combined with our targeting scheme and loss function provides the best image quality. We validate our findings for both the numerical reconstructions and optical captures that are acquired from our holographic display prototype.
{"title":"19‐4: Improving Defocus Blur in Holographic Displays","authors":"Koray Kavaklı, Yuta Itoh, H. Urey, K. Akşit","doi":"10.1002/sdtp.16537","DOIUrl":"https://doi.org/10.1002/sdtp.16537","url":null,"abstract":"In this paper we present a novel multiplane computer generated hologram calculation approach that enables artifact free and realistic‐looking defocus blur for optical reconstructions in a holographic display. We introduce a new targeting method and a loss function that evaluates the focused and defocused parts of the reconstructed images. We demonstrate that our method is applicable to various standard hologram generation routines such for both iterative and non‐iterative CGH calculation methods. We also demonstrate our new gradient descent‐based optimization with double phase constraint combined with our targeting scheme and loss function provides the best image quality. We validate our findings for both the numerical reconstructions and optical captures that are acquired from our holographic display prototype.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43538726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lin Cheng, Wei Dou, Ching-Hong Lai, Jia-Lian Wu, Jang-Jin Nam, Jin-Hui Cheng, Endong Ni
An advanced high dynamic range (HDR) liquid crystal display (LCD) with the excellent performance was developed. The HDR Display technology can enhance the contrast ratio of pictures and reduce power consumption by utilizing adaptive controlled dynamic backlight. Improved methods about simplification of lookup tables (LUT), improvement of accuracy, and maintenance of details and chroma were studied, which make it a promising technique for displays.
{"title":"P‐56: An Advanced High Dynamic Range Display Technology with Power Saving Algorithm of Adaptive Real‐time Controllable Backlight","authors":"Lin Cheng, Wei Dou, Ching-Hong Lai, Jia-Lian Wu, Jang-Jin Nam, Jin-Hui Cheng, Endong Ni","doi":"10.1002/sdtp.16905","DOIUrl":"https://doi.org/10.1002/sdtp.16905","url":null,"abstract":"An advanced high dynamic range (HDR) liquid crystal display (LCD) with the excellent performance was developed. The HDR Display technology can enhance the contrast ratio of pictures and reduce power consumption by utilizing adaptive controlled dynamic backlight. Improved methods about simplification of lookup tables (LUT), improvement of accuracy, and maintenance of details and chroma were studied, which make it a promising technique for displays.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43637662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juan Chen, Chunlei Wang, Chang-yin Wang, Peng Liang, Yan-liang Zhan, Si-kai Zhang, Zhancai Li, Xiaoqian Ju, Chuncheng Che, Zhiqiang Hou
Windows are important elements in the passenger cars that have a large impact on the light shading and heat insulation, affecting heating and lighting and interior space requirements in the cars. Flexible smart window plays an important role in human comfort and experience. In this review, we will discuss the next generation smart windows based on flexible dimming film and dye liquid crystal technology which can realized a step‐less dimming result through voltage switching, in such a way that comfortable lighting and temperatures in the car can be maintained.
{"title":"84‐2: Flexible Dye Liquid Crystal Dimming Film for Smart Window","authors":"Juan Chen, Chunlei Wang, Chang-yin Wang, Peng Liang, Yan-liang Zhan, Si-kai Zhang, Zhancai Li, Xiaoqian Ju, Chuncheng Che, Zhiqiang Hou","doi":"10.1002/sdtp.16786","DOIUrl":"https://doi.org/10.1002/sdtp.16786","url":null,"abstract":"Windows are important elements in the passenger cars that have a large impact on the light shading and heat insulation, affecting heating and lighting and interior space requirements in the cars. Flexible smart window plays an important role in human comfort and experience. In this review, we will discuss the next generation smart windows based on flexible dimming film and dye liquid crystal technology which can realized a step‐less dimming result through voltage switching, in such a way that comfortable lighting and temperatures in the car can be maintained.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45441111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
While perforated‐slot backing plates are universally used to ruggedize today's foldable OLED display modules, we investigated an alternative approach incorporating freestanding ribs connected by a low modulus spring material. We explore manufacturing options and offer a closed‐form structural analysis of both types to inform applications of the alternative approach.
{"title":"58‐2: Structurally Anisotropic Backing Sheets for Rollable‐Foldable Display Modules","authors":"W. Hamburgen","doi":"10.1002/sdtp.16692","DOIUrl":"https://doi.org/10.1002/sdtp.16692","url":null,"abstract":"While perforated‐slot backing plates are universally used to ruggedize today's foldable OLED display modules, we investigated an alternative approach incorporating freestanding ribs connected by a low modulus spring material. We explore manufacturing options and offer a closed‐form structural analysis of both types to inform applications of the alternative approach.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45828200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Changwoong Chu, Eungdo Kim, J. Sun, J. Park, Heechoon Ahn, Soo-Byung Ko, Seok-Hwan Hwang, Sunghan Kim, Changhee Lee
Phosphorescent and thermally activated delayed fluorescent (TADF) blue organic light‐emitting diodes (OLEDs) have been developed to overcome the relatively low efficiency of fluorescent OLEDs. However, device instability originating from triplet excitons and polarons limits the application of such blue OLEDs. Herein, we propose host and dopant molecules contributing to a longer device lifetime and higher color purity. Also, we discuss the devices with phosphorescence emitter (PhOLED) and phosphor‐sensitized TADF emitter (PST). Our PhOLED shows CIE‐y 0.197 and a long device lifetime of 150hrs at T95 of initial luminance of 1,000 nits. The PST shows CIE‐y 0.165 and a lifetime of 72.9hrs at the bottom‐emitting device. We will also discuss the device performance of top‐emitting structure with strong microcavity. These devices are achieved by suppressing triplet‐exciton‐ and polaron‐initiated degradation, while maximizing exciton utilization. The triplet exciton density of the TADF emitter was controlled by facilitating reverse intersystem crossing and Förster resonant energy transfer from a Pt phosphor working as a singlet exciton sensitizer. The polaron density was controlled by aligning the highest occupied molecular orbital level of the emitter and phosphor sensitizer.
{"title":"41‐1: Invited Paper: Highly Efficient and Stable Deep‐blue Organic Light‐emitting Diode Using Phosphor‐sensitized Thermally Activated Delayed Fluorescence","authors":"Changwoong Chu, Eungdo Kim, J. Sun, J. Park, Heechoon Ahn, Soo-Byung Ko, Seok-Hwan Hwang, Sunghan Kim, Changhee Lee","doi":"10.1002/sdtp.16625","DOIUrl":"https://doi.org/10.1002/sdtp.16625","url":null,"abstract":"Phosphorescent and thermally activated delayed fluorescent (TADF) blue organic light‐emitting diodes (OLEDs) have been developed to overcome the relatively low efficiency of fluorescent OLEDs. However, device instability originating from triplet excitons and polarons limits the application of such blue OLEDs. Herein, we propose host and dopant molecules contributing to a longer device lifetime and higher color purity. Also, we discuss the devices with phosphorescence emitter (PhOLED) and phosphor‐sensitized TADF emitter (PST). Our PhOLED shows CIE‐y 0.197 and a long device lifetime of 150hrs at T95 of initial luminance of 1,000 nits. The PST shows CIE‐y 0.165 and a lifetime of 72.9hrs at the bottom‐emitting device. We will also discuss the device performance of top‐emitting structure with strong microcavity. These devices are achieved by suppressing triplet‐exciton‐ and polaron‐initiated degradation, while maximizing exciton utilization. The triplet exciton density of the TADF emitter was controlled by facilitating reverse intersystem crossing and Förster resonant energy transfer from a Pt phosphor working as a singlet exciton sensitizer. The polaron density was controlled by aligning the highest occupied molecular orbital level of the emitter and phosphor sensitizer.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45876584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yannick Bliesener, Zheng Wang, Shuhui Qu, Jinwoo Park, Janghwan Lee
To correct for threshold variations in the driving transistor, pixel circuits rely on a complex sequence of inputs that drive the circuit through programming and emission phase. In this work we propose a multi‐stage optimization strategy to automate the design of input signals for arbitrary pixel circuits. By solving for the operation phases of pixel circuits separately and in reverse order our algorithm efficiently finds the narrow region of input signal designs that achieve the desired functionality in the large search space. We demonstrate the generality of our algorithm on two common pixel circuits, i.e., 3T1C and 7T1C.
{"title":"14‐4: Efficient Multi‐stage Bayesian Optimization for Optimal Display Circuit Input Signal Design","authors":"Yannick Bliesener, Zheng Wang, Shuhui Qu, Jinwoo Park, Janghwan Lee","doi":"10.1002/sdtp.16518","DOIUrl":"https://doi.org/10.1002/sdtp.16518","url":null,"abstract":"To correct for threshold variations in the driving transistor, pixel \u0000circuits rely on a complex sequence of inputs that drive the circuit \u0000through programming and emission phase. In this work we \u0000propose a multi‐stage optimization strategy to automate the \u0000design of input signals for arbitrary pixel circuits. By solving for \u0000the operation phases of pixel circuits separately and in reverse \u0000order our algorithm efficiently finds the narrow region of input \u0000signal designs that achieve the desired functionality in the large \u0000search space. We demonstrate the generality of our algorithm on \u0000two common pixel circuits, i.e., 3T1C and 7T1C.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46002713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pengtao Li, Chunhua Wang, Xiaoqiao Dong, Peng Liu, Yue Zhai, Qiannan Pan, Tiantian Liu, Dong Cui, Jie Yu, Rui Han, Qing Ma, Dk Yoon, Site Cai
With the improvement of vehicle market demand and technology update, the vehicle display technology has developed rapidly, and the electronic side view mirror has gradually entered the market. Electronic side view mirror has many advantages, such as wide viewing angle, applicability to bad weather, excellent night vision ability, etc. But it also has some limitations, such as slow response time and poor working performance in low temperature environment. In order to solve the above problems, this paper integrates TDDI and in cell heating and improves the response time through OD function, and detects temperature to control heating driver through integrated temperature sensor, so that the module can have ultra‐high response time under low temperature environment.
{"title":"P‐15: Vehicle High Response Intelligent Heating Control Electronic Side Mirror","authors":"Pengtao Li, Chunhua Wang, Xiaoqiao Dong, Peng Liu, Yue Zhai, Qiannan Pan, Tiantian Liu, Dong Cui, Jie Yu, Rui Han, Qing Ma, Dk Yoon, Site Cai","doi":"10.1002/sdtp.16930","DOIUrl":"https://doi.org/10.1002/sdtp.16930","url":null,"abstract":"With the improvement of vehicle market demand and technology update, the vehicle display technology has developed rapidly, and the electronic side view mirror has gradually entered the market. Electronic side view mirror has many advantages, such as wide viewing angle, applicability to bad weather, excellent night vision ability, etc. But it also has some limitations, such as slow response time and poor working performance in low temperature environment. In order to solve the above problems, this paper integrates TDDI and in cell heating and improves the response time through OD function, and detects temperature to control heating driver through integrated temperature sensor, so that the module can have ultra‐high response time under low temperature environment.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46051314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this work, we proposed an algorithm to evaluate any reflective polarization volume hologram (R‐PVH) Maxwellian view design based on a non‐equal weighting matrix of the field of view and gaze angle. A continuous eye movement from 0 to 17 degrees towards the ear is considered. The comparison of the eyebox of the example designs is presented after using the weighting matrix of the field of view and gaze angle. This algorithm gives us a method to evaluate any design based on the weighted distance to the center of the pupil.
{"title":"P‐90: Evaluating Maxwellian view design with a non‐equal weighting matrix","authors":"Fenglin Xi, Xiayu Feng, P. Bos","doi":"10.1002/sdtp.16844","DOIUrl":"https://doi.org/10.1002/sdtp.16844","url":null,"abstract":"In this work, we proposed an algorithm to evaluate any reflective polarization volume hologram (R‐PVH) Maxwellian view design based on a non‐equal weighting matrix of the field of view and gaze angle. A continuous eye movement from 0 to 17 degrees towards the ear is considered. The comparison of the eyebox of the example designs is presented after using the weighting matrix of the field of view and gaze angle. This algorithm gives us a method to evaluate any design based on the weighted distance to the center of the pupil.","PeriodicalId":91069,"journal":{"name":"Digest of technical papers. SID International Symposium","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46127388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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