Method for manufacturing electro-optic cells, in particular liquid crystal cells, or electrochemical photovoltaic cells

• US 6,066,018 A
• Filed: 02/03/1998
• Issued: 05/23/2000
• Est. Priority Date: 02/19/1997
• Status: Expired due to Term

• Current Assignee: Asulab SA (The Swatch Group AG)
• Original Assignee: Asulab SA (The Swatch Group AG)
• Inventors: Teres, Yvan, Kopsits, Norbert, Grupp, Joachim, Poli, Jean-Charles
• Primary Examiner(s): Ramsey, Kenneth J.
• Application Number:
  US09/018,140
• Time in Patent Office: 840 Days
• Field of Search: 349/190, 445/25, 451/102
• US Class Current: 445/25
• CPC Class Codes: G02F 1/133351 Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
• CPC Class Codes: H01G 9/2031 comprising titanium oxide, e.g. TiO2 H01G9/2036 takes precedence
• CPC Class Codes: H01G 9/2068 Panels or arrays of photoelectrochemical cells, e.g. photovoltaic modules based on photoelectrochemical cells
• CPC Class Codes: Y02E 10/542 Dye sensitized solar cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A method for manufacturing a plurality of electro-optic cells is disclosed, in particular for manufacturing liquid crystal display cells (2) or photovoltaic cells, each cell including a cavity (5) filled with a liquid and defined by sealed partitions (8, 9) between two plates (3, 4), in particular made of glass, provided with electrodes within the cavity. In a first step, a batch of cells (2) is manufactured, whose cavities are filled with the desired liquid and sealed. In a second step, the external contour (20) of each cell is cut, and if necessary a hole (10) passing through the cell, by means of a very high pressure water jet (30), the water either being loaded or not with an abrasive agent. Thus, the external layers (25, 26) such as a polarizer and a reflector may be applied onto the batch prior to the cutting step.

Claims

1. A method for manufacturing a plurality of electro-optic cells, in particular liquid crystal cells, or electrochemical photovoltaic cells, each cell including a cavity filled with a liquid and defined by sealed partitions between two plates provided with electrodes within said cavity, the method including the following steps:

(I) collective manufacturing of a batch of cells filled with said liquid and sealed, said batch including two plates common to all the cells and a pattern of sealing material bonding said plates and forming said cell partitions, and

(II) dividing said batch into individual cells and, where necessary, shaping a contour for each cell, wherein step II is achieved at least partially by cutting said batch by means of a water jet, the water either including or not an abrasive,

wherein at least one external layer, in particular a polarising layer, an anti-reflective layer and/or a protective layer, is applied on at least one external face of said batch of cells prior to step II and is cut with the plates during step II.

2. A method according to claim 1, wherein said plates are made of glass.

3. A method according to claim 1, wherein each cell has a contour and the whole of said contour of each cell is cut during step II.

4. A method for manufacturing a plurality of electro-optic cells, in particular liquid crystal cells, or electrochemical photovoltaic cells, each cell including a cavity filled with a liquid and defined by sealed partitions between two plates provided with electrodes within said cavity, the method including the following steps:

(I) collective manufacturing of a batch of cells filled with said liquid and sealed, said batch including two plates common to all the cells and a pattern of sealing material bonding said plates and forming said cell partitions, wherein said batch of cells is a rectilinear strip obtained by dividing a larger unit of cells into several strips each including one or two rows of cells, so that each cell includes at least one rectilinear edge formed by an edge of the strip and including external conductive elements connected to said electrodes, and

(II) dividing said batch into individual cells and, where necessary, shaping a contour for each cell, wherein step II is achieved at least partially by cutting said batch by means of a water jet, the water either including or not an abrasive.

5. A method according to claim 4, wherein said plates are made of glass.

6. A method according to claim 4, wherein each cell has a contour and the whole of said contour of each cell is cut during step II.

7. A method according to claim 4, wherein said division into strips is effected prior to filling the cells.

8. A method according to claim 7, wherein at least one external layer, in particular a polarising layer, an anti-reflective layer and/or a protective layer, is applied on at least one external face of said batch of cells prior to step II and is cut with the plates during step II and wherein said at least one external layer is applied after said division into strips.

9. A method for manufacturing a plurality of electro-optic cells, in particular liquid crystal cells, or electrochemical photovoltaic cells, each cell including a cavity filled with a liquid and defined by sealed partitions between two plates provided with electrodes within said cavity, the method including the following steps:

(I) collective manufacturing of a batch of cells filled with said liquid and sealed, said batch including two plates common to all the cells and a pattern of sealing material bonding said plates and forming said cell partitions, and

(II) dividing said batch into individual cells and, where necessary, shaping a contour for each cell, wherein step II is achieved at least partially by cutting said batch by means of a water jet, the water either including or not an abrasive,

wherein said partitions include, in step I, partitions common to two adjacent cells and wherein said common partitions are cut longitudinally by the water jet during step II.

10. A method according to claim 9, wherein said plates are made of glass.

11. A method according to claim 9, wherein each cell has a contour and the whole of said contour of each cell is cut during step II.

12. A method for manufacturing a plurality of electro-optic cells, in particular liquid crystal cells, or electrochemical photovoltaic cells, each cell including a cavity filled with a liquid and defined by sealed partitions between two plates provided with electrodes within said cavity, the method including the following steps:

(I) collective manufacturing of a batch of cells filled with said liquid and sealed, said batch including two plates common to all the cells and a pattern of sealing material bonding said plates and forming said cell partitions, and

(II) dividing said batch into individual cells and, where necessary, shaping a contour for each cell, wherein step II is achieved at least partially by cutting said batch by means of a water jet, the water either including or not an abrasive,

wherein each cell includes at least one through hole which is made via water jet cutting during step II.

13. A method according to claim 12, wherein said plates are made of glass.

14. A method according to claim 12, wherein each cell has a contour and the whole of said contour of each cell is cut during step II.

15. A method according to claim 12, wherein a water jet having a smaller diameter than that of said hole is used for cutting the hole, first of all for piercing the cell in an inner area of the hole, then for cutting a contour of the hole from the pierced area.