DE3782353D1 - Optische modulationsvorrichtung. - Google Patents
Optische modulationsvorrichtung.Info
- Publication number
- DE3782353D1 DE3782353D1 DE8787104841T DE3782353T DE3782353D1 DE 3782353 D1 DE3782353 D1 DE 3782353D1 DE 8787104841 T DE8787104841 T DE 8787104841T DE 3782353 T DE3782353 T DE 3782353T DE 3782353 D1 DE3782353 D1 DE 3782353D1
- Authority
- DE
- Germany
- Prior art keywords
- modulation device
- optical modulation
- optical
- modulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3622—Control of matrices with row and column drivers using a passive matrix
- G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
- G09G3/3637—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals with intermediate tones displayed by domain size control
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/141—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent using ferroelectric liquid crystals
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133371—Cells with varying thickness of the liquid crystal layer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/30—Gray scale
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2011—Display of intermediate tones by amplitude modulation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/207—Display of intermediate tones by domain size control
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61075868A JP2517549B2 (ja) | 1986-04-02 | 1986-04-02 | 光学変調素子 |
JP61075867A JPH07122703B2 (ja) | 1986-04-02 | 1986-04-02 | 光学変調素子 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3782353D1 true DE3782353D1 (de) | 1992-12-03 |
DE3782353T2 DE3782353T2 (de) | 1993-04-08 |
Family
ID=26417028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787104841T Expired - Fee Related DE3782353T2 (de) | 1986-04-02 | 1987-04-01 | Optische modulationsvorrichtung. |
Country Status (4)
Country | Link |
---|---|
US (1) | US4796980A (de) |
EP (1) | EP0240010B1 (de) |
DE (1) | DE3782353T2 (de) |
ES (1) | ES2035825T3 (de) |
Families Citing this family (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0723942B2 (ja) * | 1985-08-08 | 1995-03-15 | 株式会社半導体エネルギ−研究所 | 液晶装置 |
US4824218A (en) * | 1986-04-09 | 1989-04-25 | Canon Kabushiki Kaisha | Optical modulation apparatus using ferroelectric liquid crystal and low-resistance portions of column electrodes |
JPS62278540A (ja) * | 1986-05-27 | 1987-12-03 | Canon Inc | 液晶素子、その配向制御法及びその駆動法 |
US4932758A (en) * | 1987-09-17 | 1990-06-12 | Canon Kabushiki Kaisha | Ferroelectric smectic liquid crystal device having a bistable alignment state providing two stable orientation states |
US5422749A (en) * | 1987-09-17 | 1995-06-06 | Canon Kabushiki Kaisha | Ferroelectric smetic liquid crystal device |
AU647786B2 (en) * | 1987-09-17 | 1994-03-31 | Canon Kabushiki Kaisha | Ferroelectric smectic liquid crystal device |
US5200848A (en) * | 1987-09-17 | 1993-04-06 | Canon Kabushiki Kaisha | Ferroelectric smectic liquid crystal device |
AU610242B2 (en) * | 1987-09-18 | 1991-05-16 | Semiconductor Energy Laboratory Co. Ltd. | Liquid crystal electro-optical device |
US4906074A (en) * | 1987-09-28 | 1990-03-06 | Semiconductor Energy Laboratory Co., Ltd. | FLC liquid crystal electro-optical device having microdomains within pixels |
EP0320011B1 (de) * | 1987-12-10 | 1996-06-05 | Canon Kabushiki Kaisha | Gerät zur Darstellung von Bildern |
NL8703085A (nl) * | 1987-12-21 | 1989-07-17 | Philips Nv | Werkwijze voor het besturen van een weergeefinrichting. |
US5140447A (en) * | 1987-12-22 | 1992-08-18 | Canon Kabushiki Kaisha | Display medium having a colored polymer liquid crystal layer |
DE68914207T2 (de) * | 1988-07-26 | 1994-11-17 | Idemitsu Kosan Co | Ferroelektrische flüssigkristalline Zusammensetzung, diese Zusammensetzung verwendende optische Vorrichtung und Verfahren zur Herstellung dieser optischen Vorrichtung. |
FR2637407B1 (fr) * | 1988-09-30 | 1994-02-11 | Commissariat A Energie Atomique | Procede d'affichage de niveaux de gris sur un ecran a cristaux liquides ferroelectriques a phase smectique chirale |
US4974941A (en) * | 1989-03-08 | 1990-12-04 | Hercules Incorporated | Process of aligning and realigning liquid crystal media |
NL8901481A (nl) * | 1989-06-12 | 1991-01-02 | Philips Nv | Passieve ferro-elektrisch vloeibaar kristal weergeefinrichting en werkwijze ter vervaardiging daarvan. |
US5182662A (en) * | 1989-12-01 | 1993-01-26 | Canon Kabushiki Kaisha | Liquid crystal device |
US5073294A (en) * | 1990-03-07 | 1991-12-17 | Hercules Incorporated | Process of preparing compositions having multiple oriented mesogens |
JP2994814B2 (ja) * | 1990-11-09 | 1999-12-27 | キヤノン株式会社 | 液晶装置 |
JP2775527B2 (ja) * | 1991-02-01 | 1998-07-16 | キヤノン株式会社 | カイラルスメクチック液晶素子 |
JPH04258924A (ja) * | 1991-02-13 | 1992-09-14 | Canon Inc | カイラルスメクチック液晶素子およびその製造方法 |
US5420603A (en) * | 1991-02-20 | 1995-05-30 | Canon Kabushiki Kaisha | Display apparatus |
JPH05150244A (ja) * | 1991-02-20 | 1993-06-18 | Canon Inc | 強誘電液晶素子 |
JP2794226B2 (ja) * | 1991-04-15 | 1998-09-03 | キヤノン株式会社 | 強誘電性液晶素子の駆動装置および駆動方法 |
EP0509490A3 (en) * | 1991-04-16 | 1993-05-26 | Canon Kabushiki Kaisha | Liquid crystal apparatus |
JPH05158444A (ja) * | 1991-12-04 | 1993-06-25 | Canon Inc | 液晶表示装置 |
JPH05241138A (ja) * | 1991-12-06 | 1993-09-21 | Canon Inc | 液晶光学素子 |
EP0584963B1 (de) * | 1992-07-30 | 2001-10-04 | Canon Kabushiki Kaisha | Flüssigkristall-Anzeigevorrichtung |
US5469281A (en) * | 1992-08-24 | 1995-11-21 | Canon Kabushiki Kaisha | Driving method for liquid crystal device which is not affected by a threshold characteristic change |
US5552911A (en) * | 1992-10-19 | 1996-09-03 | Canon Kabushiki Kaisha | Color liquid crystal display device having varying cell thickness and varying pixel areas |
JP3456493B2 (ja) * | 1992-10-24 | 2003-10-14 | ソニー株式会社 | 液晶素子 |
US5532713A (en) * | 1993-04-20 | 1996-07-02 | Canon Kabushiki Kaisha | Driving method for liquid crystal device |
US5446570A (en) * | 1993-04-27 | 1995-08-29 | Canon Kabushiki Kaisha | Liquid crystal display with projecting portions on the electrodes |
GB9323242D0 (en) * | 1993-11-11 | 1994-01-05 | Central Research Lab Ltd | Temperature compensation in greyscale addressing |
GB9406742D0 (en) * | 1994-04-06 | 1994-05-25 | Crossland William A | Thin panel display screen |
DE69526291D1 (de) * | 1994-08-04 | 2002-05-16 | Canon Kk | Flüssigkristallvorrichtung |
GB2293260B (en) * | 1994-09-19 | 1998-07-08 | Sharp Kk | Liquid crystal device |
JP2997866B2 (ja) * | 1995-03-10 | 2000-01-11 | 富士通株式会社 | 強誘電性液晶表示素子 |
TW373095B (en) * | 1995-06-15 | 1999-11-01 | Canon Kk | Method for driving optical modulation unit, optical modulation or image display system |
EP0762370A3 (de) * | 1995-08-02 | 1998-01-07 | Canon Kabushiki Kaisha | Ansteuerungsverfahren für ein Anzeigegerät mit optischer Modulationsvorrichtung |
EP0782039A3 (de) | 1995-12-27 | 1998-06-17 | Canon Kabushiki Kaisha | Anzeigevorrichtung und ihr Herstellungsverfahren |
US6072555A (en) * | 1996-02-01 | 2000-06-06 | Canon Kabushiki Kaisha | Display apparatus capable of gradational display |
GB9615817D0 (en) * | 1996-07-26 | 1996-09-04 | Secr Defence | Liquid crystal device with greyscale |
GB2320103A (en) * | 1996-12-05 | 1998-06-10 | Sharp Kk | Liquid crystal devices |
US6133894A (en) * | 1996-12-17 | 2000-10-17 | Canon Kabushiki Kaisha | Driving method for optical apparatus |
US6175401B1 (en) * | 1997-05-02 | 2001-01-16 | Casio Computer Co., Ltd. | Liquid crystal display device having a liquid crystal layer which contains liquid crystal molecules in a plurality of alignment state and method for driving the same |
US6714276B2 (en) * | 2000-02-08 | 2004-03-30 | Sharp Kabushiki Kaisha | Liquid crystal display device |
BR0114463B1 (pt) * | 2000-09-18 | 2012-05-29 | cigarro com baixo nìvel de fumaça de escoamento lateral, cigarro e papel de tratamento de cigarro. | |
AU2003215454B2 (en) * | 2002-03-15 | 2009-04-09 | Rothmans, Benson & Hedges Inc. | Low sidestream smoke cigarette with combustible paper having modified ash characteristics |
JP4854182B2 (ja) * | 2004-04-16 | 2012-01-18 | 三洋電機株式会社 | 表示装置 |
US20080018673A1 (en) * | 2006-07-24 | 2008-01-24 | Peter James Fricke | Display element having substantially equally spaced human visual system (HVS) perceived lightness levels |
US20080018576A1 (en) * | 2006-07-23 | 2008-01-24 | Peter James Fricke | Display element having groups of individually turned-on steps |
DE102011003639A1 (de) * | 2010-11-11 | 2012-05-16 | Aeg Gesellschaft für Moderne Informationssysteme mbH | Flüssigkristallanzeige |
CN107209431B (zh) * | 2015-01-20 | 2020-10-23 | 香港科技大学 | 立式螺旋铁电液晶显示单元 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2824798A1 (de) * | 1978-06-06 | 1979-12-13 | Siemens Ag | Fluessigkristallzelle |
US4563059A (en) * | 1983-01-10 | 1986-01-07 | Clark Noel A | Surface stabilized ferroelectric liquid crystal devices |
FR2518299B1 (fr) * | 1981-12-15 | 1990-07-20 | Telemecanique Electrique | Dispositif indicateur de pression de consigne pour un manostat |
NL8200069A (nl) * | 1982-01-11 | 1983-08-01 | Philips Nv | Weergeefinrichting met vloeibaar kristal. |
US4655561A (en) * | 1983-04-19 | 1987-04-07 | Canon Kabushiki Kaisha | Method of driving optical modulation device using ferroelectric liquid crystal |
JPS60144721A (ja) * | 1984-01-06 | 1985-07-31 | Canon Inc | 画像形成装置 |
US4709995A (en) * | 1984-08-18 | 1987-12-01 | Canon Kabushiki Kaisha | Ferroelectric display panel and driving method therefor to achieve gray scale |
US4712877A (en) * | 1985-01-18 | 1987-12-15 | Canon Kabushiki Kaisha | Ferroelectric display panel of varying thickness and driving method therefor |
US4664480A (en) * | 1985-04-26 | 1987-05-12 | American Telephone And Telegraph Company, At&T Bell Laboratories | Alignment technique for liquid crystal devices |
JPS62119521A (ja) * | 1985-11-19 | 1987-05-30 | Canon Inc | 光学変調装置 |
-
1987
- 1987-03-27 US US07/030,569 patent/US4796980A/en not_active Expired - Lifetime
- 1987-04-01 DE DE8787104841T patent/DE3782353T2/de not_active Expired - Fee Related
- 1987-04-01 EP EP87104841A patent/EP0240010B1/de not_active Expired
- 1987-04-01 ES ES198787104841T patent/ES2035825T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3782353T2 (de) | 1993-04-08 |
US4796980A (en) | 1989-01-10 |
EP0240010B1 (de) | 1992-10-28 |
EP0240010A1 (de) | 1987-10-07 |
ES2035825T3 (es) | 1993-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3782353T2 (de) | Optische modulationsvorrichtung. | |
DE3750006D1 (de) | Optische Modulationsvorrichtung. | |
DE3674018D1 (de) | Optische kupplungsvorrichtung. | |
DE69023342D1 (de) | Optische vorrichtungen. | |
DE3786377T2 (de) | Optische Dünnschicht-Bauteile. | |
DE3577924D1 (de) | Optische verbindungsvorrichtung. | |
DE3854059T2 (de) | Optische Wellenleitervorrichtung. | |
DE68914302T2 (de) | Lichtmodulationsvorrichtung. | |
DE3770283D1 (de) | Optisches speichergeraet. | |
DE3884659D1 (de) | Optische Halbleiteranordnung. | |
DE68922472D1 (de) | Optisches Gerät. | |
DE3889523D1 (de) | Optisches Gerät. | |
DE3582678D1 (de) | Optische logische einrichtung. | |
DE3787388D1 (de) | Optisches Aufzeichnungsgerät. | |
DE69014837T2 (de) | Optische Verbindungsvorrichtung. | |
DE3778932D1 (de) | Optische visiereinrichtung. | |
DE3763266D1 (de) | Optische speicherplatte. | |
DE3783453D1 (de) | Optische vorrichtung. | |
DE3851824T2 (de) | Optische Halbleitervorrichtung. | |
DE3750694T2 (de) | Optische Ablenkeinrichtung. | |
DE3783353D1 (de) | Optische speicherplatte. | |
DE3787685T2 (de) | Optische Bild-Transformationsvorrichtung. | |
DE68919385T2 (de) | Modulationsvorrichtung für optische Kommunikationstechnik. | |
DE3787076D1 (de) | Optische filtervorrichtung. | |
DE3787065D1 (de) | Optische schaltvorrichtungen. |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |