Patent EP0814142A2 successfully refreshed from Google Patents.
EP0814142A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Liquid crystal device and liquid crystal apparatus
Assignee: Canon Inc
•
Filing: 1997-06-16
•
Granted: —
•
Expires: 2017-06-16
Abstract
Abstract A liquid crystal device is constituted by a pair of electrode plates and a liquid crystal composition disposed between the electrode plates. At least one of the electrode plates comprises a light-transmissive substrate, a plurality of electrodes including principal electrodes and auxiliary electrodes supported on the light-transmissive substrate, and an insulating layer. Each auxiliary electrode is disposed between an associated principal electrode and the light-transmissive substrate so as to be electrically connected with at least a part of the associated principal electrode, and the auxiliary electrodes being disposed with spacings therebetween which are filled with the insulating layer. The liquid crystal composition comprises at least one species of a fluorine-containing mesomorphic compound comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion, the terminal portions being connected with a central core, and having smectic mesophase or latent smectic mesophase. The combination of the above specific cell structure and the specific liquid crystal composition is effective in improving display quality (e.g., contrast) while minimizing a voltage waveform deformation.
Inventors
- 👤 Hidetoshi Tsuzuki
- 👤 Masaru Kamio
- 👤 Shinjiro Okada
- 👤 Akira Tsuboyama
- 👤 Hiroyuki Tokunaga
- 👤 Haruo Tomono
- 👤 Koichi Sato
- 👤 Yuji Matsuo
- 👤 Kazunori Katakura
- 👤 Yuko Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1343; G02F1/134309; G02F1/134336; C; C09; C09K; C09K19/00; C09K19/02; C09K19/0225; C09K19/04; C09K2323/00; G02F1/133357; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133514; G02F1/13439; G02F1/137; G02F1/139; G02F1/141
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
139 words
A liquid crystal device, comprising: a pair of electrode plates and a liquid crystal composition disposed between the electrode plates, wherein at least one of the electrode plates comprises a light-transmissive substrate, a plurality of electrodes including principal electrodes and auxiliary electrodes supported on the light-transmissive substrate, and an insulating layer; each auxiliary electrode being disposed between an associated principal electrode and the light-transmissive substrate so as to be electrically connected with at least a part of the associated principal electrode, and the auxiliary electrodes being disposed with spacings therebetween which are filled with the insulating layer, and the liquid crystal composition comprises at least one species of a fluorine-containing mesomorphic compound comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion, the terminal portions being connected with a central core, and having smectic mesophase or latent smectic mesophase.
Claim 2
Dependent Claim
14 words
A device according to Claim 1, wherein the insulating layer comprises a polymeric material.
Claim 3
Dependent Claim
14 words
A device according to Claim 2, wherein the polymeric material comprises a ultraviolet-cured resin.
Claim 4
Independent Claim
20 words
A device according to any preceding claim, wherein each of the electrode plates is provided with an alignment control layer.
Claim 5
Dependent Claim
42 words
A device according to Claim 4, wherein the alignment control layer provided to one electrode plate is subjected to a uniaxial aligning treatment and the alignment control layer provided to the other electrode plate is not subjected to a uniaxial aligning treatment.
Claim 6
Dependent Claim
23 words
A device according to Claim 5, wherein the alignment control layer to be subjected to the uniaxial aligning treatment comprises a polyimide film.
Claim 7
Independent Claim
40 words
A device according to any preceding claim, wherein the surface of the auxiliary electrodes and the surface of the light-transmissive substrate provided a distance therebetween larger than a distance between the surface of the insulating layer and the light-transmissive substrate.
Claim 8
Independent Claim
14 words
A device according to any preceding claim, wherein the principal electrodes comprises transparent electrodes.
Claim 9
Independent Claim
48 words
A device according to any preceding claims, wherein at least one of the electrode plates further comprises a masking member including a plurality of masking portions disposed on the light-transmissive substrate, each masking portion being disposed so as to correspond to a spacing between associated adjacent principal electrodes.
Claim 10
Dependent Claim
24 words
A device according to Claim 9, wherein the masking member is electroconductive and each masking portion is electrically connected with an associated auxiliary electrode.
Claim 11
Independent Claim
118 words
A device according to any preceding claim, wherein said fluorocarbon terminal portion in the fluorine-containing mesomorphic compound is represented by the formula -D 1 -C xa F 2xa -X, where xa is 1 - 20; X is -H or -F; -D 1 - is -CO-O-(CH 2 ) ra -, -O-(CH 2 ) ra -, -(CH 2 ) ra -, -O-SO 2 -, -SO 2 -, -SO 2 -(CH 2 ) ra -, -O-(CH 2 ) ra -O-(CH 2 ) rb -, -(CH 2 ) ra -N(C pa H 2pa+1 )-SO 2 - or -(CH 2 ) ra -N(C pa H 2pa+1 )- CO- where ra and rb are independently 1 - 20; and pa is 0 - 4.
Claim 12
Independent Claim
161 words
A device according to any of Claims 1-10, wherein said fluorocarbon terminal portion in the fluorine-containing mesomorphic compound is represented by the formula -D 2 -(C xb F 2xb -O) za -C ya F 2ya+1 , where xb is independently 1 - 10 for each (C xb F 2xb -O); ya is 1 - 10; za is 1 - 10; -D 2 - is -CO-O-C rc H 2rc , -O-C rc H 2rc -, -C rc H 2rc -, -O-(C sa H 2sa -O) ta -C rd H 2rd -, -O-SO 2 -, -SO 2 -, -SO 2 -C rc H 2rc -, -C rc H 2rc -N(C pb H 2p+1 )-SO 2 -, -C rc H 2rc - N(C pb H 2pb+1 )-CO-, or a covalent bond where rc and rd are independently 1 - 20; sa is independently 1 - 10 for each (C sa H 2sa -O); ta is 1 - 6; and pb is 0 - 4.
Claim 13
Independent Claim
348 words
A device according to any of Claims 1-10, wherein said fluorine-containing mesomorphic compound is represented by the following general formula (I): wherein A 1 , A 2 and A 3 are each independently ga, ha and ia are independently an integer of 0 - 3 with the proviso that the sum of ga+ha+ia be at least 2; L 1 and L 2 are independently a covalent bond, -CO-O-, -O-CO-, -COS-, -S-CO-, -CO-Se-, -Se-CO-, -CO-Te-, -Te-CO-, -CH 2 CH 2 -, -CH=CH-, -C≡C-, -CH=N-, -N=CH-, -CH 2 -O-, -O-CH 2 -, -CO- or -O-; X 1 , Y 1 and Z 1 are each a substituent of A 1 , A 2 and A 3 , respectively, and each X 1 , Y 1 and Z 1 are independently -H, -Cl, -F, -Br, -I, -OH, -OCH 3 , -CH 3 , -CN or -NO 2 ; each ja, ma and na are independently an integer of 0 - 4; J 1 is -CO-O-(CH 2 ) ra -, -O-(CH 2 ) ra -, -(CH 2 ) ra -, -O-SO 2 -, -SO 2 -, -SO 2 -(CH 2 ) ra -, -O-(CH 2 ) ra -O-(CH 2 ) rb -, -(CH 2 ) ra -N(C pa H 2pa+1 )-SO 2 - or -(CH 2 ) ra -N(C pa H 2pa+1 )- CO- where ra and rb are independently 1 - 20, and pa is 0 - 4; R 1 is -O-C qa H 2qa -O-C qb H 2qb+1 , -C qa H 2qa -O-C qb H 2qb+1 , -C qa H 2qa -R 3 , -O-C qa H 2qa -R 3 , -CO-O-C qa H 2qa -R 3 , or -O-CO-C qa H 2qa -R 3 which may be either straight chain or branched where R 3 is -O-CO-C qb H 2qb+1 , -CO-O-C qb H 2qb+1 , -H, -Cl, -F, -CF 3 , -NO 2 or -CN; and qa and qb are independently 1 - 20; and R 2 is C xa F 2xa -X, wherein X is -H or -F, xa is an integer of 1 - 20.
Claim 14
Independent Claim
409 words
A device according to any of claims 1-10, wherein said fluorine-containing mesomorphic compound is represented by the general formula (II): where A 4 , A 5 and A 6 are each independently denote gb, hb and ib are each independently an integer of 0 - 3 with the proviso that the sum of gb+hb+ib be at least 2; each L 3 and L 4 are independently a single bond, -CO-O-, -O-CO-, -CO-S-, -S-CO-, -CO-Se-, -Se-CO-, -CO-Te-, -Te-CO-, -(CH 2 CH 2 ) ka - (ka is 1 - 4), -CH=CH-, -C≡C-, -CH=N-, -N=CH-, -CH 2 -O-, -O-CH 2 -, -CO- or -O-; X 2 , Y 2 and Z 2 are each a substituent of A 4 , A 5 and A 6 , respectively, and each X 2 , Y 2 and Z 2 are independently -H, -Cl, -F, -Br, -I, -OH, -OCH 3 , -CH 3 , -CF 3 , -O-CF 3 , -CN or -NO 2 ; each jb, mb and nb are independently an integer of 0 - 4; J 2 is -CO-O-C rc H 2rc -, -O-C rc H 2rc -, -C rc H 2rc -, -O-(C sa H 2sa -O) ta -C rd H 2rd -, -O-SO 2 -, -SO 2 -, -SO 2 - C rc H 2rc -, -C rc H 2rc -N(C pb H 2pb+1 )-SO 2 - or -C rc H 2rc -N(C pb H 2pb+1 )-CO- where rc and rd are independently 1 - 20; sa is independently 1 - 10 for each (C sa H 2sa -O), ta is 1 - 6; pb is 0 - 4; R 4 is -O-(C qc H 2qc -O) wa -C qd H 2qd+1 , -(C qc H 2qc -O) wa -C qd H 2qd+1 , -C qc H 2qc -R 6 , -O-C qc H 2qc -R 6 , -CO-O- C qc H 2qc -R 6 , or O-CO-C qc H 2qc -R 6 which may be either straight chain or branched where R 6 is -O-CO-C qd H 2qd+1 ; -CO-O-C qd H 2qd+1 , -Cl, -F, -CF 3 , -NO 2 , -CN or -H; qc and qd are independently 1 - 20; wa is 1 - 10; and R 5 is (C xb F 2xb -O) za -C ya F 2ya+1 , where xb is independently 1 - 10 for each (C xb F 2xb -O); ya is 1 - 10; and za is 1 - 10.
Claim 15
Dependent Claim
26 words
A liquid crystal apparatus, including a liquid crystal device according to any one of Claims 1 - 14 and means for driving the liquid crystal device.
Claim 16
Dependent Claim
173 words
A liquid crystal device, comprising: a pair of first and second electrode plates and a liquid crystal composition disposed between the electrode plates, wherein the first electrode plates comprises a light-transmissive substrate, a plurality of electrodes including principal electrodes and auxiliary electrodes supported on the light-transmissive substrate, and an insulating layer; each auxiliary electrode being disposed between an associated principal electrode and the light-transmissive substrate so as to be electrically connected with at least a part of the associated principal electrode, and the auxiliary electrodes being disposed with spacings therebetween which are filled with the insulating layer, and the second electrode plate comprises a light-transmissive substrate and a plurality of electrodes including principal electrodes and auxiliary electrodes disposed on the light-transmissive substrate, each auxiliary electrode being disposed between an associated principal electrode and the light-transmissive substrate so as to be electrically connected with at least a part of the associated principal electrode, and each principal electrode contacting the light-transmissive substrate at a spacing between an associated auxiliary electrode and an adjacent auxiliary electrode.
Claim 17
Dependent Claim
40 words
A device according to Claim 16, wherein each of the first and second electrode plates is provided with an alignment control layer, only the alignment control layer provided to the first electrode plate being subjected to a uniaxial aligning treatment.
Claim 18
Dependent Claim
50 words
A device according to Claim 16 or 17, wherein the liquid crystal composition comprises at least one species of a fluorine-containing mesomorphic compound comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion, the terminal portions being connected with a central core, and having smectic mesophase or latent smectic mesophase.
Claim 19
Dependent Claim
17 words
A device according to Claim 16, 17 or 18, wherein the insulating layer comprises a polymeric material.
Claim 20
Dependent Claim
23 words
A device according to Claim 17, wherein the alignment control layer to be subjected to a uniaxial aligning treatment comprises a polyimide film.
Claim 21
Independent Claim
15 words
A device according to any of Claims 16-20, wherein the principal electrodes comprises transparent electrodes.
Claim 22
Independent Claim
28 words
A device according to any of Claims 16-21, wherein the light-transmissive substrate of the first electrode plate or the second electrode plate is provided with a masking member.
Claim 23
Dependent Claim
23 words
A liquid crystal apparatus including a liquid crystal device according to any of Claims 16-22 and means for driving the liquid crystal device.
Claim 24
Dependent Claim
35 words
An apparatus according to Claim 23, wherein the plurality of electrodes of the first electrode plate are supplied with a scanning signal and those of the second electrode plate are supplied with a data signal.
Claim 25
Dependent Claim
189 words
A liquid crystal device, comprising: a pair of first and second electrode plates and a liquid crystal composition disposed between the electrode plates, wherein the first electrode plates comprises a light-transmissive substrate, a plurality of electrodes including principal electrodes and auxiliary electrodes supported on the light-transmissive substrate, and an insulating layer; each auxiliary electrode being disposed between an associated principal electrode and the light-transmissive substrate so as to be electrically connected with at least a part of the associated principal electrode, and the auxiliary electrodes being disposed with spacings therebetween which are filled with the insulating layer, and the second electrode plate comprises a light-transmissive substrate, a color filter disposed on the light-transmissive substrate, a flattening layer disposed on the color filter, and a plurality of electrodes including principal electrodes and auxiliary electrodes disposed on the flattening layer; each auxiliary electrode being disposed between an associated principal electrode and the flattening layer so as to be electrically connected with at least a part of the associated principal electrode, and each principal electrode contacting the flattening layer at a spacing between an associated auxiliary electrode and an adjacent auxiliary electrode.
Claim 26
Dependent Claim
40 words
A device according to Claim 25, wherein each of the first and second electrode plates is provided with an alignment control layer, only the alignment control layer provided to the first electrode plate being subjected to a uniaxial aligning treatment.
Claim 27
Dependent Claim
50 words
A device according to Claim 25 or 26, wherein the liquid crystal composition comprises at least one species of a fluorine-containing mesomorphic compound comprising a fluorocarbon terminal portion and a hydrocarbon terminal portion, the terminal portions being connected with a central core, and having smectic mesophase or latent smectic mesophase.
Claim 28
Dependent Claim
17 words
A device according to Claim 25, 26 or 27, wherein the insulating layer comprises a polymeric material.
Claim 29
Dependent Claim
23 words
A device according to Claim 26, wherein the alignment control layer to be subjected to a uniaxial aligning treatment comprises a polyimide film.
Claim 30
Independent Claim
15 words
A device according to any of Claims 25-29, wherein the principal electrodes comprises transparent electrodes.
Claim 31
Independent Claim
28 words
A device according to any of Claims 25-30, wherein the light-transmissive substrate of the first electrode plate or the second electrode plate is provided with a masking member.
Claim 32
Dependent Claim
32 words
A liquid crystal apparatus including a liquid crystal device according to any of Claims 25-31, a backlight device disposed outside the first electrode plate and means for driving the liquid crystal device.
Claim 33
Dependent Claim
35 words
An apparatus according to Claim 32, wherein the plurality of electrodes of the first electrode plate are supplied with a scanning signal and those of the second electrode plate are supplied with a data signal.
Claim 34
Dependent Claim
79 words
An electrode plate for a liquid crystal device comprising a light transmissive substrate and electrodes on the substrate spaced apart at a pitch defining a pixel dimension, wherein each electrode comprises an auxiliary electrode of relatively low resistance material and which is smaller than the pixel and a principal electrode of relatively high resistance material and whose size corresponds to that of the pixel, the principal electrode being connected to the auxiliary electrode in a region where they overlap.
Claim 35
Dependent Claim
21 words
The plate of Claim 34, wherein the auxiliary electrode comprises a metal or a resin having electroconductive fine particles dispersed therein.
Claim 36
Dependent Claim
15 words
The plate of Claim 34 or 35, wherein the auxiliary electrodes are of thickness 0.3-3µm.
Claim 37
Dependent Claim
15 words
The plate of any of Claims 34-36, wherein the principal electrodes comprise a transparent oxide.
Claim 38
Dependent Claim
18 words
The plate of Claim 37, wherein the principal electrodes comprise indium oxide, tin oxide or indium tin oxide.
Claim 39
Independent Claim
124 words
A method for forming an electrode plate for a liquid crystal device which comprises: (a) forming on a light transmissive substrate auxiliary electrodes of relatively low resistance material, the auxiliary electrodes being spaced apart at a pitch defining a pixel dimension and the auxiliary electrodes being smaller than the pixel dimension; (b) coating the substrate with a UV-curable resin; (c) pressing a smooth plate against the coated substrate and curing the resin; (d) removing the smooth plate to give a flat surface at which the auxiliary electrodes appear, separated by cured resin; and (e) depositing principal electrodes of relatively higher resistance material whose size corresponds to that of the pixels, the principal electrodes being connected to the auxiliary electrodes in regions where they overlap.
Claim 40
Dependent Claim
19 words
The method of Claim 39, comprising the further step of coating the plate with a layer of polymeric material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.