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Displaying 1-26 of 26 articles from this issue
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Article type: Cover
Pages Cover1-
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (13K) -
Article type: Index
Pages Toc1-
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (107K) -
Tetsuo Fukami, Masanori Kimura, Katsuhiko Kumagawa, Satoshi Asada, Hir ...Article type: Article
Session ID: IDY2001-22
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAn advanced driving method, called MPD(Mega Pixel Driving), and a new pixel structure, called A-IPS(Advanced In-Plane-Switching), have been developed. MPD combines dual-line driving and a design of optimized storage capacitor for each pixel. A-IPS is a zigzag shaped pixel that consists of zigzag shaped source line, common and pixel electrodes and color filter. Using these technologies, a 23-inch diagonal in-plane-switching mode TFT-LCD has developed. This TFT-LCD demonstrates good uniformity by MPD and higher luminance(125%)than conventional IPS mode LCD by A-IPS structure.View full abstractDownload PDF (1157K) -
N. Nakane, T. Izoe, Y. Koshida, K. Igawa, I. FukudaArticle type: Article
Session ID: IDY2001-23
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe reflective color LCD is an important device for highly portable information terminals. In this paper, we numerically analyze the electro-optical properties of a single polarizer reflective M(Modified)DTN-LCD with one retardation film. This LCD has the same structure as the previously proposed single polarizer reflective DTN-LCD and/or FDTN-LCD with one retardation film. However, the retardations of the compensating TN cell(or LC polymer film)and the driving TN cell are different. We found that the LCD exhibits a high luminous reflectance and a high contrast ratio when the device parameters are optimized even if a typical LC polymer film with a large dispersion of Δn is used.View full abstractDownload PDF (645K) -
Yoshihisa Iwamoto, Yasufumi IimuraArticle type: Article
Session ID: IDY2001-24
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSFor improving the transmitted light efficiency, we have theoretically and experimentally studied amorphous and multi-domain LCDs combined with two quarter wave plates. As a result, we obtained that the transmitted light efficiency of a multi-domain vertically aligned(MVA-)LCD panel was improved up to 1.6 times that of a conventional panel. Then we studied on viewing angle characteristic of MVA-LCDs with two quarter wave plates, and found that it is necessary to use negative biaxial compensator for achieving wide-viewing zone. We also show that the further improvement of the efficiency can be achieved by using a cholesteric film and the obtained final improvement in the transmitted light efficiency of the LCD panel was over 2 times that of the conventional panel.View full abstractDownload PDF (914K) -
Takeshi Takematsu, Hiroyuki Okada, Hiroyoshi OnnagawaArticle type: Article
Session ID: IDY2001-25
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSModulated microdomain switching of nematic liquid crystals have been investigated. This display mode has been used on formation of micron-sized domains using a complicated electric field with special mesh electrode structures. Alignment of liquid crystal used was homeotropic. Under He-Ne laser irradiation, contrast ratio was 22:1 and transmittance was independent of incident polarization condition. Under white light illumination, the contrast ratio was 4.3:1. Transmittance versus voltage characteristics and response times were almost similar to conventional vertical alignment mode. Switching motion of liquid crystal was also investigated.View full abstractDownload PDF (955K) -
K. Yasuda, M. Tosaka, T. Okiyama, T. Kajiro, M. YokozawaArticle type: Article
Session ID: IDY2001-26
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSUnfortunately, commercial LCD monitors have several defects on the display area. Therefore, factories should have repaired these defects before shipping to get good yield. We have studied species and numbers of actual display monitors by simulation technique in which we have generated artificial defects on a no-defect LCD monitor. On results, white pixel defects are most detectable and black one is less visible. And detection ability of people does not depend on defects location on the panel.View full abstractDownload PDF (1343K) -
Shinya ONDA, Tetsuya MIYASHITA, Tatuo UCHIDAArticle type: Article
Session ID: IDY2001-27
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn order to improve the response speed of nematic liquid crystal device, numerical calculation is one of the effective way to evaluate the material parameters. In general, the dynamic response of liquid crystal molecule is analyzed by equation of motion in which only rotational viscosity is taken into account. In this research, it is clarified that the conventional analysis using above mentioned equation is not valid and that the equation of motion based on Ericksen-Leslie is effective to discuss response time of various LCDs. Based on it, the possible high speed response properties of OCB-mode is estimated.View full abstractDownload PDF (599K) -
H. Ichinose, S. Nakajima, T. Takeda, Y. Sugiyama, H. Numata, S. Naemur ...Article type: Article
Session ID: IDY2001-28
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSHigh optical anisotropy(Δn)and small rotational viscosity(γ_1)liquid crystal material has been investigated for field-sequential color TN-LCD applications. By introducing the new tolane substances, it was succeeded to develop novel LC mixtures which coexisted high Δn and small γ_1, which enable TN-LCDs to switch fast enough to be applied to field-sequential color displays not only at room temperature but also at deep one. These LCDs should be driven by active matrix for color images. Therefore it was also confirmed that the voltage-holding ratio(VHR)was sufficiently high at high temperature. In due consideration of practical use, the storage test of TN-cells under light irradiation was performed regarding their VHR property. It was confirmed that high VHR could be kept for over 10, 000 hours under a practical condition.View full abstractDownload PDF (575K) -
Hajime Nakamura, Kazuo SekiyaArticle type: Article
Session ID: IDY2001-29
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe effect of overdrive addressing on the optical response of a nematic liquid crystal device was assessed both theoretically and experimentally, where a comprehensive calculation method that deals with hydrodynamic flow and multiplexing addressing scheme, and an experimental setup for measuring the response time of a liquid crystal device under emulated multiplexing addressing were introduced. When optimized suitably, the overdrive method brought the response times between the gray levels below the frame period. Experimental results on the transient optical response were in excellent agreement with the simulated responses, where the hydrodynamic flow and multiplexing addressing showed non-negligible effects on director reorientation.View full abstractDownload PDF (1106K) -
H. Takemoto, Y. Nishida, H. Takahashi, T. Kawakami, T. Miyashita, T. U ...Article type: Article
Session ID: IDY2001-30
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn Reflective LCD using conventional front scattering film, high brightness and high uniformity of brightness are incompatible due to its scattering property. In order to achieve scattering property of high and uniform intensity, we have tried to apply periodical structure due to spinodal decomposition. As the result of simulating scattering properties on reflector we have induced parameter conditions for uniform intensity. It is suggested that this film designed for cellular phones can improve brightness by about 10% keeping uniformity. It is confirmed that the films with the designed properties can be actually fabricated.View full abstractDownload PDF (730K) -
T. ISHINABE, T. MIYASHITA, T. UCHIDAArticle type: Article
Session ID: IDY2001-31
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecently, various LCD modes have been proposed to enhance the viewing angle of LCDs. However, in order to realize a wide viewing angle and high contrast ratio in all directions, a retardation film and polarizer with wide viewing angle and high achromaticity are required. In this paper, we investigated the design rules of wide viewing angle retardation film and polarizer with high achromaticity.View full abstractDownload PDF (766K) -
[in Japanese]Article type: Article
Session ID: IDY2001-32
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESS -
Jun XU, Shunsuke KOBAYASHIArticle type: Article
Session ID: IDY2001-33
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe most important problem in developing liquid crystal display(LCDs)utilizing ferroelectric liquid crystal(FLC)is how to obtain defect free FLCDs. In this report a phenomenological analysis for getting C1 or C2 uniform state in SS-FLC has been done. Utilizing this theory, the free energies including bulk elastic and surface parts have been simulated depending on parameters such as surface topography, anchoring energies, LC thickness, and other values. Furthermore we have found out the critical conditions of the C1 and C2 states transition and succeeded in fabricating defect free FLCD with C2 uniform used rubbing and with C1 uniform used photoalignment technique.View full abstractDownload PDF (453K) -
Hiroto SATO, Hideo FUJIKAKE, Yoshiki IINO, Hiroshi KIKUCHI, Masahiro K ...Article type: Article
Session ID: IDY2001-34
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed a printing fabrication process for large and light-weight liquid crystal devices and have fabricated ferroelectric liquid crystal(FLC)devices with plastic film substrates. The proposed process is based on a flexographic printing method. FLC/monomer solution coated on an anilox roll was uniformly deposited on the letter press and then transferred to the surface of the substrate from the letter press. This method is able to control thickness and printing area of the solution on the substrate. Pressure of a roller for lamination was adjusted so that an upper substrate was pressed onto spacers dispersed in the solution. Formation of air bubble in the solution was reduced by heating upper and lower substrates to 50℃. And then the laminated cell was pressed by a glass to prevent curling of the substrates and to obtain uniform cell temperature. After the cell was irradiated by ultraviolet light, polymer network which supports the substrates was formed in the FLC. Alignment of liquid crystal modecules was observed. Light modulation effects including grayscale capability were also observed when voltage was applied between electrodes of the devices.View full abstractDownload PDF (969K) -
Kazuki Taira, Ryoji Tsuda, Tatsuo Saishu, Naotoshi Matsuda, Kouhei Suz ...Article type: Article
Session ID: IDY2001-35
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe fabricated a prototype of a field-sequential color CRT using a liquid crystal color shutter(LCCS)with a diagonal size of 15 inches. In order to reduce a color breakup artifact, anti-ferroelectric liquid crystal materials are applied for the cell fabrication in the LCCS for the purpose of fast switching. The optical design of the LCCS was performed using the Jones matrix calculation and the optimization of the optical parameters such as transmittance of chromatic polarizers, a spectrum of a phosphor in the monochrome CRT. And film compensation of the LC cell maximized its optical efficiency and color gamut. This prototype realized displaying at a 540 Hz field frequency by adjustment of the driving sequence of the LCCS-CRT and the relation between the number of the LCCS driving stripes and the lifetime of the phosphor in the CRT.View full abstractDownload PDF (913K) -
J. Kimiya, S. Okubo, T. Hasegawa, H. Oda, F. HoshinoArticle type: Article
Session ID: IDY2001-36
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSToshiba has developed the new electron gun for M46 100° FLAT CDT(Color Display Tube)with high deflection sensitivity utilizing mini-neck(Φ22.5)system. In order to solve the disadvantage in it's focus characteristics, a new electron gun has been developed with a new main lens system. The new main lens system simultaneously reduces the lens magnification and emphasizes the astigmatism compensation in the periphery on the screen. As a result, we have achieved a higher resolution than before over the entire screen.View full abstractDownload PDF (588K) -
Naoki Manabe, Yuji TakahashiArticle type: Article
Session ID: IDY2001-37
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecently, large size LCDs have been widly used for LCD monitor and TV application. High luminous flux and long lifetime are required for the cold cathode fluoresent lamp(CFL). We developed a CFL with a protection layer between the phosphor layer and the glass tube, and phosphor coated with fine particles. The total lumen maintenance and the chromaticity maintenance were improved in the developed CFLs. We also confirmed the improvement in the luminance maintenance of the backlight unit with the developed CFLs. Especially in the unit which used many pieces of CFLs, surface reflectance of the lamp contributes to the improvement of the lumen maintenance.View full abstractDownload PDF (648K) -
Kazuhiro Matsuo, Kenji Yamada, Nobuto TsujikawaArticle type: Article
Session ID: IDY2001-38
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIt has been recently spread the LCD panel applied for the Flat Display TV. Then, the cold cathode fluorescent lamps used for the LCD panel, are requested long life(high luminous maintenance factor)and low color sifting. In order to solve these problems, we examined forming protective films among phosphor particle and on phosphor surface by using the sol-gel method. Through investigation of selection material for protective film, we have eventually chosen yttrium oxide as the best material. And we optimized its process technology. This technology improves luminous maintenance factor of the lamps without falling initial luminance at all. We estimated that luminous maintenance factor achieves 60% or more at 70, 000hrs. Also, the technology can control color shifting.View full abstractDownload PDF (636K) -
Reiji OhtsukaArticle type: Article
Session ID: IDY2001-39
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe developed an actual phosphor for Xe discharge fluorescent lamps as a lightting source for information tools. A Xe discharge fluorescent lamp emits visible lights from phosphors excited by vacuum ultra-violet radiated from xenon excimer instead of mercury. PDP phosphors have been used for Xe discharge fluorescent lamps. We investigated the excitation properties of phosphors and the relations between phosphor composition and its thermal quenching and subsequently developed a phosphor for Xe discharge fluorescent lamps having high luminance and stability.View full abstractDownload PDF (633K) -
Tatsushi FUJINO, Masatoshi RYOKO, Masaharu AONOArticle type: Article
Session ID: IDY2001-40
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThis paper describes a color control of the xenon-mercury fluorescent lamps by using the internal(axial direction)and external(radial direction)electrodes. A mixture of two kinds of phosphor was coated on the inner surface of the lamp : one of them is excited by the resonance radiation of mercury, the other is excited by vacuum ultraviolet(VUV)radiation of xenon, and the emitted color of them differs each other. The emitted color of the lamp was changed from blue to red, from blue to green and from organge to green at adequate combinations of phosphors by varying the mixture ratio of axial and radial discharges.View full abstractDownload PDF (729K) -
T. Ogura, T. Tsutsumi, S. TamaruArticle type: Article
Session ID: IDY2001-41
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSLight source system for LCD projectors is composed of the lamp and the reflector and has to satisfy the compactness and the high output intensity. Though smaller reflector is useful for downsizing the light source system, it reduces the effective reflection plane and induces the decrease of illuminance on the screen. We studied on the development of the short-arc high pressure mercury lamp, reduction of focal length of the reflector, precision of reflector contour and the condition for aligning a lamp with a reflector. The new light source system has about three quarters reflection face and actualizes 1.13 times as bright screen as the conventional type.View full abstractDownload PDF (607K) -
Reiji HATTORI, Yoshihiro HARADA, Keisuke HIRATAArticle type: Article
Session ID: IDY2001-42
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have presented the electropheretic display with a new structure, which can has higher brightness, higher contrast, higher resolution and less power dissipation than reflective-type liquid crystal display. This display is characterized by the lens structure of upper panel and the transparent dispersion solution, and realizes coexistence of high-response and high-contrast, which has never been realized by a traditional electrophoretic display. This will be applied to a use of cellular-phone, personal digital assistant and electronic paper utilizing the features of zero-dissipation and paper-white.View full abstractDownload PDF (1112K) -
Atsushi Sugahara, Kenichi Mori, Isao Amemiya, Hitoshi Kobayashi, Teruo ...Article type: Article
Session ID: IDY2001-43
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSRecently, research and development on reflective displays have been activated, because their features such as low power consumption and harmless for eyes. Ideal picture quality of reflective display is that of color printed matter. However, it is thought to be technically difficult to achieve this ideal features by conventional display technology. In this presentation, Actuated Film Display(AFD)which reproduce paper like white and full color will be proposed. Small black films or cyan, magenta and yellow films are mechanically actuated on white films by electrostatic force in this display, therefore picture quality can be close to the printed matter.View full abstractDownload PDF (893K) -
Article type: Appendix
Pages App1-
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (83K) -
Article type: Cover
Pages Cover2-
Published: January 30, 2001
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (68K)
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