CA1195415A - Process for positioning the liquid in a liquid medium cell - Google Patents
Process for positioning the liquid in a liquid medium cellInfo
- Publication number
- CA1195415A CA1195415A CA000403722A CA403722A CA1195415A CA 1195415 A CA1195415 A CA 1195415A CA 000403722 A CA000403722 A CA 000403722A CA 403722 A CA403722 A CA 403722A CA 1195415 A CA1195415 A CA 1195415A
- Authority
- CA
- Canada
- Prior art keywords
- liquid medium
- surface tension
- cell
- area
- tension force
- 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
Links
Classifications
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
-
- 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
- G02F1/1341—Filling or closing of cells
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The invention relates to a process for positioning the liquid medium in a liquid medium cell and to a corresponding cell. The cell comprises a liquid medium placed between two walls kept spaced from one another, e.g. by shims, and joined along the edge thereof, wherein it comprises first system for produc-ing a first surface tension force in a first area and second system for producing a second surface tension force in a second area, the first surface tension force being higher than the second surface tension force, said systems serving to correctly position the liquid medium between the two walls, the liquid medium then being located in the first area and outside the second area.
The invention relates to a process for positioning the liquid medium in a liquid medium cell and to a corresponding cell. The cell comprises a liquid medium placed between two walls kept spaced from one another, e.g. by shims, and joined along the edge thereof, wherein it comprises first system for produc-ing a first surface tension force in a first area and second system for producing a second surface tension force in a second area, the first surface tension force being higher than the second surface tension force, said systems serving to correctly position the liquid medium between the two walls, the liquid medium then being located in the first area and outside the second area.
Description
PROCESS FOR POSITIONING THE _ QUID MEDIUM IN A LIQUID
MEDIUM CELL ~ND A CORRESPONDING CE~L.. . . ..
. _ . . ~
BACKGROUND OF THE INV NTIOND
The present invention relates to a process for positioning the liquid medium in a l;quid medium ce]l and to a corresponding cellO It is used in optoelectronics and particula.r..ly in the production of a screen for displaying pictures and/or alphanumeric data.
Such a cell comprises a liquid medium placed between two fla-t walls, which are generally thin compared with their transverse dimensions and which are generally made from glass9 whilst being kept spaced from one another. The two walls are join2d to one another in the vicinity of their edges by means o~ resins or other appropriate binders making it possible to lock . --.
them in the correct position~ The two walls can be kept at a particu.lar spacing from one another e.g.
by means of shims, which are in particular arranged along the welded edges or are distributed ~s uniformly as possible between the two walls. It can also be obtained by using rigid wallsg e.g. as a result o:f their relatively great thickness.
In the. display field, the most commonly used liquid med;um is a liquid crystal which, as its name indicates, has in the liquid state properties characteristic of solid crystals and in particular with regards to the anisotropy.
In general , to obtain a satisfactory operation o the cell, its entire useful area must be filled with liquid medium. However~ it is known that dur m g the A'~
filling of the cell with liquid medium9 gas bub~es appear within the cell. These gas bubbles must be positioned at a point wlthiTI the cell a which is not liable to prejudice the operation thereof. I~us 5 the presence of gas bubbles in the useful area of the cell can be particularly prejudicial, when the cell is used in the display of images and/or alph~nume~ic data.
BRIEF SUM~ARY OF THE INVENTION
. _ . . . _ ., .
The problem o~ the present invention is a process makirgit possible to position the liquid medium contained in a cell solely in the useful area of said cell, so that the gas bubbles can be located in the non~useful area thereofO It also relates to a corresponding lîquid meclum cell.
More specifically9-the present invention rela-tes to a cell o~ the aforementioned type, wherein it comprises first means for producing in a first area a first surface tension force and second means for producing in a second area a second surface tension force, the first surace tension force being higher thall the second surEace tension force~ the means for producing the different surace tension forces serving to correctly position the liquid rnedium between the two walls, the liquid mediurn then being locatecl at least partly in the first area and at least partly outside the second area.
In the cell~ the liquid medium used is preferably a liquid crystal.
According to a preferred embodiment of the cell, 0 the means for producing the different surface tension
MEDIUM CELL ~ND A CORRESPONDING CE~L.. . . ..
. _ . . ~
BACKGROUND OF THE INV NTIOND
The present invention relates to a process for positioning the liquid medium in a l;quid medium ce]l and to a corresponding cellO It is used in optoelectronics and particula.r..ly in the production of a screen for displaying pictures and/or alphanumeric data.
Such a cell comprises a liquid medium placed between two fla-t walls, which are generally thin compared with their transverse dimensions and which are generally made from glass9 whilst being kept spaced from one another. The two walls are join2d to one another in the vicinity of their edges by means o~ resins or other appropriate binders making it possible to lock . --.
them in the correct position~ The two walls can be kept at a particu.lar spacing from one another e.g.
by means of shims, which are in particular arranged along the welded edges or are distributed ~s uniformly as possible between the two walls. It can also be obtained by using rigid wallsg e.g. as a result o:f their relatively great thickness.
In the. display field, the most commonly used liquid med;um is a liquid crystal which, as its name indicates, has in the liquid state properties characteristic of solid crystals and in particular with regards to the anisotropy.
In general , to obtain a satisfactory operation o the cell, its entire useful area must be filled with liquid medium. However~ it is known that dur m g the A'~
filling of the cell with liquid medium9 gas bub~es appear within the cell. These gas bubbles must be positioned at a point wlthiTI the cell a which is not liable to prejudice the operation thereof. I~us 5 the presence of gas bubbles in the useful area of the cell can be particularly prejudicial, when the cell is used in the display of images and/or alph~nume~ic data.
BRIEF SUM~ARY OF THE INVENTION
. _ . . . _ ., .
The problem o~ the present invention is a process makirgit possible to position the liquid medium contained in a cell solely in the useful area of said cell, so that the gas bubbles can be located in the non~useful area thereofO It also relates to a corresponding lîquid meclum cell.
More specifically9-the present invention rela-tes to a cell o~ the aforementioned type, wherein it comprises first means for producing in a first area a first surface tension force and second means for producing in a second area a second surface tension force, the first surace tension force being higher thall the second surEace tension force~ the means for producing the different surace tension forces serving to correctly position the liquid rnedium between the two walls, the liquid mediurn then being locatecl at least partly in the first area and at least partly outside the second area.
In the cell~ the liquid medium used is preferably a liquid crystal.
According to a preferred embodiment of the cell, 0 the means for producing the different surface tension
2~
~ ~5~
forces are constituted by two materials covering the sllrfaces of walls facing the liquid medium, one of the materials being more wetting and the other less wetting3 the wetting material leading to the highest surfare tenslon force and the non~wetting material lead;ng t.o the lowest surface tension force.
According to another preferred embodime~t of the in~ention~ the means for produoing the diferent surface tension forces are constituted by the walls of the cell defining two regions of different 'LhiCkneSSes?
the smallest thickness region leading to the highest surface tension force and the largest thickness region leading to the smalles~ surface tension force.
The invention also relates to a process for positioning the liquid medium in a cell of the type described her~inbefore, wherein before joining the two walls, the facing ~all surfaces are covered with two materials having different surface tensions~ in such a way that after filling the cell with liquid medîum, the area occupied by the liquid medium is located outside the material having the lowesL surface tension and the area occupied by the liquid medium must be posi~ioned in front of the material having the highest surface tension~
According to anokher emb~diment of -the process according to the invention, walls defining two regions of different thicknesses are u~ed~ in such a way ~.hat after filling the cell with liquid medium, the area occupied by the liquid medium is outside the largest thickness region and the area occupied by the l;quid
~ ~5~
forces are constituted by two materials covering the sllrfaces of walls facing the liquid medium, one of the materials being more wetting and the other less wetting3 the wetting material leading to the highest surfare tenslon force and the non~wetting material lead;ng t.o the lowest surface tension force.
According to another preferred embodime~t of the in~ention~ the means for produoing the diferent surface tension forces are constituted by the walls of the cell defining two regions of different 'LhiCkneSSes?
the smallest thickness region leading to the highest surface tension force and the largest thickness region leading to the smalles~ surface tension force.
The invention also relates to a process for positioning the liquid medium in a cell of the type described her~inbefore, wherein before joining the two walls, the facing ~all surfaces are covered with two materials having different surface tensions~ in such a way that after filling the cell with liquid medîum, the area occupied by the liquid medium is located outside the material having the lowesL surface tension and the area occupied by the liquid medium must be posi~ioned in front of the material having the highest surface tension~
According to anokher emb~diment of -the process according to the invention, walls defining two regions of different thicknesses are u~ed~ in such a way ~.hat after filling the cell with liquid medium, the area occupied by the liquid medium is outside the largest thickness region and the area occupied by the l;quid
-3-5medium is loca~ed in the smallest thickness region.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail h~reinafter relative to non-limitative embodiments and the attached drawings, wherein show.
Fig 1 a sectional view of a liquid medium cell according to a first variant.
Fig 2 a plan view of ~he cell of Fig 1. 0 Fig 3 a se~tional view of a liquid medîum cell according to a second variant.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig 1 is a sectional view of a liquid medium cell constituted by a liquid mediurn 2, which can be a liquid crystal, placed between two parallel flat walls
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is described in greater detail h~reinafter relative to non-limitative embodiments and the attached drawings, wherein show.
Fig 1 a sectional view of a liquid medium cell according to a first variant.
Fig 2 a plan view of ~he cell of Fig 1. 0 Fig 3 a se~tional view of a liquid medîum cell according to a second variant.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Fig 1 is a sectional view of a liquid medium cell constituted by a liquid mediurn 2, which can be a liquid crystal, placed between two parallel flat walls
4 and 6. The two flat glass walls 4 and 6 are kept spaced frorn one another by m~ans of constant thickness shims 8, regularly distributed between the two walls.
Walls 49 6 are joined to one another by means of a 20 weld 10 made in the vicinity of the edges of the walls.
Weld 10, which acts as a sealing wall9 can be produced by means of resins or by screen process printing of fusible glass.
Such a liquid crystal cell is produced by placing constant thickness shims 8 on e.g~ one o~ ~he walls by any known means. The wall pr~vi~ed with the shims is made to face the other wall in such a way that the sh;ms are located between the two walls. Finally9 the two walls 4~ ~ are joined together ~y weld 10 and the cell is filled wlth l;quid medium 2 through an adequate opening 18 (Fig 2~.During the filling ~f thP celL, a gas pocket 12 or gas bubbles appear within the cell~ --According to the invention9 in order to position the liquid medium in the useful area of the cell7 e.g~in lts centre and consequently position the gas pocket in the non-useful area of the cell~ such as e.g. on t~e perîphery thereof, ~he surfa2es of the acing walls 4 and 6 are covered with two materials 14a, 14b having different surface tensions.
Fig 2 is a plan view of the cell showing the respective posit:ions of the two materials 14a, 14b.
Material 14a having the highest surface tension and whic~ is also called a wetting m~terial i5 placecl in the centre of the surfaces of facing walls 4 and 6 in such a way that liquid medium 2 occ~pies the central area of the cell. Wetting medium 14a attracts the liquid medium towards it. Conversely, material 14b having tlle lowest surface tension and also called non-2Q wetting material 9 can be placed on the periphery ofthe cell on the surfaces of said facing walls in such a way that the area occupied by the liquid medium is outside the said material l~b, which exerts little or no attraction on theliquid mecliumD Therefore~ gas pocket 12 is expelled opposite to mkaterial 14~; i.e.
outside material 14a.
In the case of a cell used for the display o images and~or alphanumeric data9 gas pockPt 12 can be located outside the useful area for the display and the liquid medium to the right of said useful area.
Material 14a having the highest surface tensionis, for example, a material chosen from the group including lecithin, siloxanes of formula SiOn, resins o the alkyl benzene sulphonate type known under the abbreviation ABS resins and resins known under the ahbreviation DMOAP.
The material 14b having the lowest surface tension is~ for example7 a -1uoric material such as carbon fluoride or magnesium fluoride.
According to another variant of the process for the positioning of the liquid medium inthe liquid medium cell, walls 4 and 6 are used, which define between them regions of different thicknesses, i.e. the cell has two different thicknesses.
By means of a sectional view o the cell~ Fig 3 shows a possible location for these two regions.
Region 16a corresponding to the smallest thickness of the cell and consequently to the highest surface tension (Jurin's law) attracts the liquid medium 2 towards it.
Thus, the area occupied by the liquid Inedium îs ~xated to the right of region 16a, such as e.g. in the central area of the cell if said region 16a is located in the centre of the cell. Conversely, region 16b~ correspondîng to the greatest thickness oE the cell and conse~uen-tly to the lowest surface tension, exerts little attractlon on the liquid medium. Therefore, the area occupied by the liquid medium is positioned outside region 16b~
whilst the gas pocket is located to the right of said medium 16b~ such as e.g. at the periphery of the cell if region 16b is located at the periphery of the cell~
~6 ... ..
To facilitate unders-tanding, regions 16a and 16b have been deliberately exaggerated in Fig 3.
It is obviously possible to use a cell in which only a single wall defines regions 16a and 16b~
S the othe~ wall being strictly flat.
. . ~
Walls 49 6 are joined to one another by means of a 20 weld 10 made in the vicinity of the edges of the walls.
Weld 10, which acts as a sealing wall9 can be produced by means of resins or by screen process printing of fusible glass.
Such a liquid crystal cell is produced by placing constant thickness shims 8 on e.g~ one o~ ~he walls by any known means. The wall pr~vi~ed with the shims is made to face the other wall in such a way that the sh;ms are located between the two walls. Finally9 the two walls 4~ ~ are joined together ~y weld 10 and the cell is filled wlth l;quid medium 2 through an adequate opening 18 (Fig 2~.During the filling ~f thP celL, a gas pocket 12 or gas bubbles appear within the cell~ --According to the invention9 in order to position the liquid medium in the useful area of the cell7 e.g~in lts centre and consequently position the gas pocket in the non-useful area of the cell~ such as e.g. on t~e perîphery thereof, ~he surfa2es of the acing walls 4 and 6 are covered with two materials 14a, 14b having different surface tensions.
Fig 2 is a plan view of the cell showing the respective posit:ions of the two materials 14a, 14b.
Material 14a having the highest surface tension and whic~ is also called a wetting m~terial i5 placecl in the centre of the surfaces of facing walls 4 and 6 in such a way that liquid medium 2 occ~pies the central area of the cell. Wetting medium 14a attracts the liquid medium towards it. Conversely, material 14b having tlle lowest surface tension and also called non-2Q wetting material 9 can be placed on the periphery ofthe cell on the surfaces of said facing walls in such a way that the area occupied by the liquid medium is outside the said material l~b, which exerts little or no attraction on theliquid mecliumD Therefore~ gas pocket 12 is expelled opposite to mkaterial 14~; i.e.
outside material 14a.
In the case of a cell used for the display o images and~or alphanumeric data9 gas pockPt 12 can be located outside the useful area for the display and the liquid medium to the right of said useful area.
Material 14a having the highest surface tensionis, for example, a material chosen from the group including lecithin, siloxanes of formula SiOn, resins o the alkyl benzene sulphonate type known under the abbreviation ABS resins and resins known under the ahbreviation DMOAP.
The material 14b having the lowest surface tension is~ for example7 a -1uoric material such as carbon fluoride or magnesium fluoride.
According to another variant of the process for the positioning of the liquid medium inthe liquid medium cell, walls 4 and 6 are used, which define between them regions of different thicknesses, i.e. the cell has two different thicknesses.
By means of a sectional view o the cell~ Fig 3 shows a possible location for these two regions.
Region 16a corresponding to the smallest thickness of the cell and consequently to the highest surface tension (Jurin's law) attracts the liquid medium 2 towards it.
Thus, the area occupied by the liquid Inedium îs ~xated to the right of region 16a, such as e.g. in the central area of the cell if said region 16a is located in the centre of the cell. Conversely, region 16b~ correspondîng to the greatest thickness oE the cell and conse~uen-tly to the lowest surface tension, exerts little attractlon on the liquid medium. Therefore, the area occupied by the liquid medium is positioned outside region 16b~
whilst the gas pocket is located to the right of said medium 16b~ such as e.g. at the periphery of the cell if region 16b is located at the periphery of the cell~
~6 ... ..
To facilitate unders-tanding, regions 16a and 16b have been deliberately exaggerated in Fig 3.
It is obviously possible to use a cell in which only a single wall defines regions 16a and 16b~
S the othe~ wall being strictly flat.
. . ~
Claims (11)
1. A cell comprising a liquid medium placed between two walls kept spaced from one another, the walls being joined to one another along their edge, wherein it comprises first means for producing in a first area a first surface tension force and second means for producing in a second area a second surface tension force, the first surface tension force being higher than the second surface tension force, the means for producing the different surface tension forces serving to correctly position the liquid medium between the two walls, the liquid medium then being located at least partly in the first area and at least partly outside the second area.
2. A cell according to claim 1, wherein the means for producing the different surface tension forces are constituted by two materials covering the surfaces of walls facing the liquid medium, one of the materials being more wetting and the other less wetting, the wetting material leading to the highest surface tension force and the non-wetting material leading to the lowest surface tension force.
3. A cell according to claim 1, wherein the means for producing the different surface tension forces are constituted by the walls of the cell defining two regions of different thicknesses, the smallest thickness region leading to the highest surface tension force and the largest thickness region leading to the smallest surface tension force.
4. A cell, according to claim 1, wherein the liquid medium is a liquid crystal.
5. A cell, according to claim 2, wherein the material having the lowest surface tension is a fluoric mate-rial.
6. A cell, according to claim 5, wherein the fluoric material is chosen from the group including carbon fluoride and magnesium fluoride.
7. A cell, according to claim 2, wherein the material having the highest surface tension is chosen from the group including lecithin, siloxanes, resins of the al-kyl benzene sulphonate type and resins known under the abbreviation DMOAP.
8. Process for positioning a liquid medium in a cell according to claim 1, comprising producing in a first area a first surface tension force and producing in a second area a second surface tension force lower than the first surface tension force, in such a way that after filling the cell with liquid medium, the area occupied by the liquid medium is positioned in the first area and outside the second area.
9. A process for positioning the liquid medium in a cell according to claim 8, wherein before joining the two walls, the facing wall surfaces are covered with two materials having different surface tensions, in such a way that after filling the cell with liquid medium, the area occupied by the liquid medium is located outside the material having the lowest surface tension and the area occupied by the liquid medium must be positioned in front of the material having the highest surface tension.
10. A process for positioning a liquid medium in a cell according to claim 8, wherein walls defining two regions of different thicknesses are used, in such a way that after filling the cell with liquid medium, the area occupied by the liquid medium is outside the larg-est thickness region and the area occupied by the liquid medium is located in the smallest thickness region.
11. A positioning process for positioning a liquid medium in a display cell according to claims 9 or 10, wherein gaz pockets appearing during the operation of the display cell are located outside the display areas.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8110564 | 1981-05-27 | ||
| FR8110564A FR2506979A1 (en) | 1981-05-27 | 1981-05-27 | METHOD FOR LOCATING THE LIQUID MEDIUM IN A LIQUID MEDIUM CELL AND CORRESPONDING CELL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1195415A true CA1195415A (en) | 1985-10-15 |
Family
ID=9258947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000403722A Expired CA1195415A (en) | 1981-05-27 | 1982-05-26 | Process for positioning the liquid in a liquid medium cell |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0066509B1 (en) |
| JP (1) | JPS57204026A (en) |
| CA (1) | CA1195415A (en) |
| DE (1) | DE3270074D1 (en) |
| FR (1) | FR2506979A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62125221U (en) * | 1986-01-31 | 1987-08-08 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3600061A (en) * | 1969-03-21 | 1971-08-17 | Rca Corp | Electro-optic device having grooves in the support plates to confine a liquid crystal by means of surface tension |
| GB1381428A (en) * | 1972-07-04 | 1975-01-22 | Electrovac | Liquid-crystal cells |
| JPS4928360A (en) * | 1972-07-05 | 1974-03-13 | ||
| JPS49114948A (en) * | 1973-03-05 | 1974-11-01 | ||
| FR2225068A5 (en) * | 1973-04-06 | 1974-10-31 | Honeywell Bull Soc Ind | Liquid crystal display cell - thin liquid layer enclosed in channels in support plate |
-
1981
- 1981-05-27 FR FR8110564A patent/FR2506979A1/en active Granted
-
1982
- 1982-05-24 DE DE8282400949T patent/DE3270074D1/en not_active Expired
- 1982-05-24 EP EP19820400949 patent/EP0066509B1/en not_active Expired
- 1982-05-26 JP JP8813282A patent/JPS57204026A/en active Pending
- 1982-05-26 CA CA000403722A patent/CA1195415A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0066509B1 (en) | 1986-03-26 |
| FR2506979B1 (en) | 1983-10-07 |
| DE3270074D1 (en) | 1986-04-30 |
| EP0066509A1 (en) | 1982-12-08 |
| FR2506979A1 (en) | 1982-12-03 |
| JPS57204026A (en) | 1982-12-14 |
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