WO1997026583A1 - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- WO1997026583A1 WO1997026583A1 PCT/IB1997/000022 IB9700022W WO9726583A1 WO 1997026583 A1 WO1997026583 A1 WO 1997026583A1 IB 9700022 W IB9700022 W IB 9700022W WO 9726583 A1 WO9726583 A1 WO 9726583A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- edge
- display device
- top coat
- layer
- electrodes
- Prior art date
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
- G02F1/133345—Insulating layers
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
Definitions
- the invention relates to a display device comprising an electro-optical material between a first substrate and a second, substantially parallel substrate, in a space bounded by a sealing edge, said first substrate being provided with electrodes and a color filter which is covered with a protective layer only within the space bounded by the sealing edge.
- Such display devices are well known and are used, for example, in monitors, television receivers and display devices for motor cars, telephone equipment and instruments.
- a display device of the type mentioned in the opening paragraph is described in USP 5, 157,527 (PHN 13.252).
- a description is given of the manner in which a color filter on a first substrate is covered with a protective layer, the so-called top coat, which is situated within the space bounded by the sealing edge.
- Such a patterned top coat is provided, for example, by flexographic printing and has a number of advantages over a top coat applied by "spinning". In the latter method (spinning), the top coat extends underneath the sealing edge, so that this sealing edge is not bonded directly on to the substrate (or on to an electrode provided thereon), but on to the top coat (or on to an electrode provided thereon), which in turn is bonded on to the substrate.
- the material used for the top coat is often permeable to moisture, so that moisture coming from outside penetrates the display device.
- the printing method is cheaper than spinning because, among other things, the material is less expensive.
- a drawback of the printing method occurs when, in order to increase the contrast, the color filter is provided with a layer of an opaque material (black matrix), which is composed entirely or partly of a conductive material.
- black matrix an opaque material
- said top coat must extend beyond the color filter, including the black matrix (while allowing a given tolerance).
- a part of the useful surface is lost at the edge of the effective display section, so that the effective display section is reduced in size.
- a display device in accordance with the invention is characterized in that the color filter is provided, at least at an edge, with a conductive material-containing layer of an opaque material, which is electrically insulated, at least at the location of the edge of the protective layer, from an electrode present at said edge by an additional layer of electrically insulating material.
- the layer of an opaque material (black matrix) now is electrically insulated, at the location of the edge of the protective layer, from an electrode situated at said edge, a short-circuit between the electrode and the black matrix cannot occur. Consequently, the top coat does not have to extend throughout the black matrix and can end, for example, on a conductive part of said black matrix.
- the above-mentioned insulation is obtained, for example, by means of an additional layer of an electrically insulating material, which extends under a part of the protective layer or under the entire protective layer.
- Fig. 1 is a schematic, cross-sectional view of a part of a display device in accordance with the prior art, whereas
- Fig. 2 and Fig. 3 are schematic, cross-sectional views of a part of a display device in accordance with the invention.
- Fig. 1 is a schematic, cross-sectional view of a part of a liquid-crystal display device comprising a liquid-crystal cell 1 having a twisted nematic liquid-crystal material 2 sandwiched between two substrates 3,4, which are made, for example, of glass.
- the liquid-crystal material is enclosed in the cell by means of a sealing edge 5.
- a color filter 6 which is provided with color elements 7 and with a metallic black mask 8, which, in this example, is made of chromium, is situated on the first substrate 3.
- the color filter is covered with a top coat 10 which is situated within the space bounded by the sealing edge 5 and which carries electrodes 1 1.
- the electrodes 11 are, for example, strip-shaped and define, together with strip-shaped electrodes 12 situated on the other substrate, a matrix of pixels (passive matrix). It is alternatively possible that the strip-shaped electrodes 11 form column electrodes, while the electrodes 12 form separate picture electrodes which are connected, via two-pole switching elements (for example MIMs or diodes) to selection electrodes (not shown).
- two-pole switching elements for example MIMs or diodes
- an additional insulating layer 9 extends over the color filter layer 6, so that the black matrix 8 is electrically insulated from the electrode 1 1 , at the location of the edge of the top coat, and said short-circuit is precluded.
- the minimum distance from the sealing edge 5 to the effective display section, which is determined by the electrode 12, is now defined by the distance d 2 (the sum of the minimum distance between the sealing edge and the edge of the top coat and the minimum overlap of the top coat and the color filter). Consequently, the provision of the additional insulating layer 9, which may for example consist of silicon nitride, leads to a substantial saving of space at the location of the edge of the cell.
- the additional insulating layer extends, on the one hand, underneath the entire top coat and, on the other hand, underneath the electrode 11 and beyond the sealing edge. However, this is not necessary, as is shown in Fig. 3 in which the additional insulating layer 9 extends only from the sealing edge underneath and beyond the edge of the top coat.
- the invention relates to insulating, for example by means of an additional layer of an insulating material, of electrodes and conductive parts of a black matrix relative to each other at the location of the edge of a patterned top coat of a display device.
- the measure results in an increase of the effective image surface area.
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)
- Optical Filters (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP97900028A EP0815489A1 (en) | 1996-01-18 | 1997-01-16 | Display device |
JP9525832A JPH11502952A (en) | 1996-01-18 | 1997-01-16 | Display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96200121.0 | 1996-01-18 | ||
EP96200121 | 1996-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997026583A1 true WO1997026583A1 (en) | 1997-07-24 |
Family
ID=8223595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB1997/000022 WO1997026583A1 (en) | 1996-01-18 | 1997-01-16 | Display device |
Country Status (4)
Country | Link |
---|---|
US (1) | US5929830A (en) |
EP (1) | EP0815489A1 (en) |
JP (1) | JPH11502952A (en) |
WO (1) | WO1997026583A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TW483038B (en) * | 2000-05-26 | 2002-04-11 | Koninkl Philips Electronics Nv | Display device |
CN103558712B (en) * | 2013-11-21 | 2015-12-02 | 京东方科技集团股份有限公司 | A kind of color membrane substrates, its method for making, In-cell touch panel and display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01267517A (en) * | 1988-04-19 | 1989-10-25 | Seiko Epson Corp | Electrode plate for color liquid crystal display device |
EP0572089A2 (en) * | 1992-05-29 | 1993-12-01 | Koninklijke Philips Electronics N.V. | Method of manufacturing a top coat |
JPH06167715A (en) * | 1992-11-30 | 1994-06-14 | Sharp Corp | Color liquid crystal display device |
JPH06273743A (en) * | 1993-03-19 | 1994-09-30 | Seiko Instr Inc | Color liquid crystal electrooptic device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4853296A (en) * | 1986-10-22 | 1989-08-01 | Toppan Printing Co., Ltd. | Electrode plate for color display device |
EP0326112B1 (en) * | 1988-01-29 | 1994-09-14 | Toppan Printing Co., Ltd. | Electrode plate for display device and method for preparation thereof |
US5128785A (en) * | 1989-08-08 | 1992-07-07 | Ube Industries, Ltd. | Liquid crystal display device substantially free from cross-talk having varistor layers coupled to signal lines and picture electrodes |
NL9000389A (en) * | 1990-02-19 | 1991-09-16 | Philips Nv | DEVICE WITH COLOR FILTER. |
JP2782291B2 (en) * | 1990-08-30 | 1998-07-30 | キヤノン株式会社 | Ferroelectric liquid crystal color panel |
US5079214A (en) * | 1990-10-11 | 1992-01-07 | Eastman Kodak Company | Patterned receiver for color filter array |
US5231524A (en) * | 1991-02-12 | 1993-07-27 | U.S. Philips Corporation | Method of manufacturing a top coat |
US5438421A (en) * | 1991-04-24 | 1995-08-01 | Alps Electric Co., Ltd. | Orientation film of liquid crystal having bilaterally asymmetric ridges separated by grooves |
DE69406266T2 (en) * | 1993-07-06 | 1998-04-02 | Philips Electronics N.V., Eindhoven | METHOD FOR PREPARING A COMPOSITE MATERIAL CONTAINING A SILICONE NETWORK AND CHAINS OF A POLYHYDROXY COMPOSITION, AND A LIQUID CRYSTAL DISPLAY DEVICE WITH A TOP LAYER FROM THIS MATERIAL |
-
1997
- 1997-01-16 JP JP9525832A patent/JPH11502952A/en not_active Ceased
- 1997-01-16 EP EP97900028A patent/EP0815489A1/en not_active Withdrawn
- 1997-01-16 WO PCT/IB1997/000022 patent/WO1997026583A1/en not_active Application Discontinuation
- 1997-01-21 US US08/784,675 patent/US5929830A/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01267517A (en) * | 1988-04-19 | 1989-10-25 | Seiko Epson Corp | Electrode plate for color liquid crystal display device |
EP0572089A2 (en) * | 1992-05-29 | 1993-12-01 | Koninklijke Philips Electronics N.V. | Method of manufacturing a top coat |
JPH06167715A (en) * | 1992-11-30 | 1994-06-14 | Sharp Corp | Color liquid crystal display device |
US5535030A (en) * | 1992-11-30 | 1996-07-09 | Sharp Kabushiki Kaisha | LCD having an overcoat film only over a display portion and either an electrode terminal or a seal portion |
JPH06273743A (en) * | 1993-03-19 | 1994-09-30 | Seiko Instr Inc | Color liquid crystal electrooptic device |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 027 (P - 992) 19 January 1990 (1990-01-19) * |
PATENT ABSTRACTS OF JAPAN vol. 018, no. 497 (P - 1801) 16 September 1994 (1994-09-16) * |
PATENT ABSTRACTS OF JAPAN vol. 18, no. 688 (P - 1849) 26 December 1994 (1994-12-26) * |
Also Published As
Publication number | Publication date |
---|---|
EP0815489A1 (en) | 1998-01-07 |
US5929830A (en) | 1999-07-27 |
JPH11502952A (en) | 1999-03-09 |
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