Patent EP0387805A2 successfully refreshed from Google Patents.
EP0387805A2
Expired / Lapsed
EP
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Method of manufacturing liquid crystal display device
Assignee: Toshiba Corp
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Filing: 1990-03-13
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Granted: —
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Expires: 2010-03-13
Abstract
Abstract In a method of manufacturing a liquid crystal display device of this invention, a light transmittance of an overcoating layer (28, 78) of the liquid crystal display device is partially reduced to form a part of a light-shielding portion (25, 75). Therefore, a color filter (18, 68) can be easily formed, and hence the device can be manufactured at high productivity and low cost.
Inventors
- 👤 Thunekazu C/O Intellectual Property Div. Yoshino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 01:43
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133512; G02F1/133514
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
177 words
A method of manufacturing a liquid crystal display device including, a first substrate (2) obtained by forming a color filter (18) having a plurality of color and light-shielding portions (24), and a first electrode (2) on a light-transmitting substrate (8), a second substrate (4) which is arranged opposite to said first substrate and on which a second electrode (17) is formed, a liquid crystal composition (6) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, characterized by comprising: the step of forming said plurality of color portions on said light-transmitting substrate, and forming first light-shielding portions between said color portions; the step of forming an overcoating layer (28) on said color and first light-shielding portions; the step of forming a plurality of transparent electrodes (12) each having a predetermined shape on said overcoating layer; and the thermal treatment step of changing the color of said overcoating layer on which no electrode is formed between said plurality of transparent electrodes into black to form second light-shielding portions.
Claim 2
Independent Claim
177 words
A method of manufacturing a liquid crystal display device including, a first substrate (2) obtained by forming a color filter (18) having a plurality of color and light-shielding portions (24), and a first electrode (2) on a light-transmitting substrate (8), a second substrate (4) which is arranged opposite to said first substrate and on which a second electrode (17) is formed, a liquid crystal composition (6) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, characterized by comprising: the step of forming said plurality of color portions on said light-transmitting substrate, and forming first light-shielding portions between said color portions; the step of forming an overcoating layer (28) on said color and first light-shielding portions; the step of forming a plurality of transparent electrodes (12) each having a predetermined shape on said overcoating layer; and the thermal treatment step of changing the color of said overcoating layer on which no electrode is formed between said plurality of transparent electrodes into black to form second light-shielding portions.
Claim 3
Dependent Claim
20 words
A method according to claim 1, characterized in that said color and first light-shielding portions are formed into stripe patterns.
Claim 4
Dependent Claim
41 words
A method according to claim 1, characterized in that said color portions are formed into a stripe pattern, and said transparent electrodes are formed into a stripe pattern in a direction which intersects with said stripe pattern of said color portions.
Claim 5
Dependent Claim
33 words
A method according to claim 3, characterized in that the direction of said stripe pattern of said color portions is substantially perpendicular to the direction of said stripe pattern of said transparent electrodes.
Claim 6
Dependent Claim
19 words
A method according to claim 1, characterized in that said second light-shielding portion is formed into a stripe pattern.
Claim 7
Dependent Claim
20 words
A method according to claim 1, characterized in that said liquid crystal display device is manufactured by a printing method.
Claim 8
Dependent Claim
25 words
A method according to claim 1, characterized in that the thickness of said first light-shielding portion falls within the range of 1.5 to 2.0 µ.
Claim 9
Dependent Claim
24 words
A method according to claim 1, characterized in that the thickness of said overcoating layer falls within the range of 2.0 to 3.0 µ.
Claim 10
Dependent Claim
21 words
A method according to claim 1, characterized in that the thickness of each of said transparent electrodes is about 500 Å.
Claim 11
Dependent Claim
29 words
A method according to claim 1, characterized in that said overcoating layer is thermally treated in an atmosphere at about 250°C for one hour in the thermal treatment step.
Claim 12
Independent Claim
235 words
A method of manufacturing a liquid crystal display device including a first substrate (52) obtained by forming a color filter (68) having a plurality of color and light-shielding portions (75), and a first electrode (62) on a light-transmitting substrate (58), a second substrate (54) arranged opposite to said first substrate and having a second electrode (69) formed thereon, a liquid crystal composition (56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions on said light-transmitting substrate of said first substrate; a step of forming an overcoating layer (78) on said color portions; a step of forming a plurality of first transparent electrodes (62) on said overcoating layer; a first thermal treatment step of reducing a light transmittance of those regions of said overcoating layer between said plurality of first transparent electrodes on which no electrodes are provided, thereby forming first light-shielding portions; a step of forming an undercoating layer (67) on said light transmitting substrate of said second substrate; a step of forming a plurality of second transparent electrodes (69) on said undercoating layer; and a second thermal treatment step of reducing a light transmittance of those regions of said undercoating layer between said plurality of second transparent electrodes on which no electrodes are provided, thereby forming second light-shielding portions.
Claim 13
Independent Claim
235 words
A method of manufacturing a liquid crystal display device including a first substrate (52) obtained by forming a color filter (68) having a plurality of color and light-shielding portions (75), and a first electrode (62) on a light-transmitting substrate (58), a second substrate (54) arranged opposite to said first substrate and having a second electrode (69) formed thereon, a liquid crystal composition (56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions on said light-transmitting substrate of said first substrate; a step of forming an overcoating layer (78) on said color portions; a step of forming a plurality of first transparent electrodes (62) on said overcoating layer; a first thermal treatment step of reducing a light transmittance of those regions of said overcoating layer between said plurality of first transparent electrodes on which no electrodes are provided, thereby forming first light-shielding portions; a step of forming an undercoating layer (67) on said light transmitting substrate of said second substrate; a step of forming a plurality of second transparent electrodes (69) on said undercoating layer; and a second thermal treatment step of reducing a light transmittance of those regions of said undercoating layer between said plurality of second transparent electrodes on which no electrodes are provided, thereby forming second light-shielding portions.
Claim 14
Dependent Claim
22 words
A method according to claim 11, characterized in that said color portions and said first light-shielding portions are formed into stripe patterns.
Claim 15
Dependent Claim
39 words
A method according to claim 11, characterized in that said color portions are formed into a stripe pattern, and said first transparent electrodes are formed into a stripe pattern in a direction intersecting said stripe of said color portions.
Claim 16
Dependent Claim
34 words
A method according to claim 11, characterized in that the direction of a stripe pattern of said color portions is substantially perpendicular to the direction of a stripe pattern of said first transparent electrodes.
Claim 17
Dependent Claim
28 words
A method according to claim 11, characterized in that said second light-shielding portions are formed into a stripe pattern in a direction substantially parallel to said color portions.
Claim 18
Dependent Claim
20 words
A method according to claim 11, characterized in that said liquid crystal display device is manufactured by a printing method.
Claim 19
Dependent Claim
20 words
A method according to claim 11, characterized in that said overcoating layer is formed approximately 2.0 to 3.0 µ thick.
Claim 20
Dependent Claim
19 words
A method according to claim 11, characterized in that said first transparent electrodes are formed approximately 2000 Å thick.
Claim 21
Dependent Claim
20 words
A method according to claim 11, characterized in that said undercoating layer is formed approximately 2.0 to 3.0 µ thick.
Claim 22
Dependent Claim
36 words
A method according to claim 11, characterized in that in said first and second thermal treatment steps, said overcoating layer and said undercoating layer are thermally treated in an atmosphere at approximately 250°C for one hour.
Claim 23
Independent Claim
158 words
A method of manufacturing a liquid crystal display device including a first substrate (2, 52) obtained by forming a color filter (18, 68) having a plurality of color portions, and a first electrode (12, 62) on a light-transmitting substrate (8, 58), a second substrate (4, 54) arranged opposite to said first substrate and having a second electrode (17, 69) formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions (18, 68) on said light-transmitting substrate; a step of forming an overcoating layer (28, 78) on said color portions; a step of forming a first transparent electrode (12, 62) with a predetermined shape on said overcoating layer, and a thermal treatment step of coloring that region of said overcoating layer where said transparent electrode is not provided.
Claim 24
Independent Claim
158 words
A method of manufacturing a liquid crystal display device including a first substrate (2, 52) obtained by forming a color filter (18, 68) having a plurality of color portions, and a first electrode (12, 62) on a light-transmitting substrate (8, 58), a second substrate (4, 54) arranged opposite to said first substrate and having a second electrode (17, 69) formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions (18, 68) on said light-transmitting substrate; a step of forming an overcoating layer (28, 78) on said color portions; a step of forming a first transparent electrode (12, 62) with a predetermined shape on said overcoating layer, and a thermal treatment step of coloring that region of said overcoating layer where said transparent electrode is not provided.
Claim 25
Dependent Claim
32 words
A method according to claim 21, characterized in that said color portions are formed into a stripe pattern, and said first transparent electrode has a stripe shape intersecting said stripe-shaped color portions.
Claim 26
Dependent Claim
35 words
A method according to claim 21, characterized in that said color portions are formed into a stripe pattern, and said first transparent electrode has a stripe shape being in parallel to said stripe-shaped color portions.
Claim 27
Independent Claim
187 words
A method of manufacturing a liquid crystal display device including a first substrate (2, 52) obtained by forming a color filter (18, 68) having a plurality of color portions, and a first electrode (12, 62) on a light-transmitting substrate (8, 58), a second substrate (4, 54) arranged opposite to said first substrate and having a second electrode (17, 69) formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions (18, 68) on said light-transmitting substrate; a step of forming an overcoating layer (28, 78) on said color portions; a step of forming transparent electrodes (12, 62) corresponding to individual pixels on said overcoating layer; a thermal treatment step of coloring those regions of said overcoating layer where said transparent electrodes are not provided; and a step of forming a transparent conductive thin film on said transparent electrodes corresponding to said individual pixels and said overcoating layer, for electrically connecting said transparent electrodes to each other.
Claim 28
Independent Claim
187 words
A method of manufacturing a liquid crystal display device including a first substrate (2, 52) obtained by forming a color filter (18, 68) having a plurality of color portions, and a first electrode (12, 62) on a light-transmitting substrate (8, 58), a second substrate (4, 54) arranged opposite to said first substrate and having a second electrode (17, 69) formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second electrodes, said method characterized by comprising: a step of forming said plurality of color portions (18, 68) on said light-transmitting substrate; a step of forming an overcoating layer (28, 78) on said color portions; a step of forming transparent electrodes (12, 62) corresponding to individual pixels on said overcoating layer; a thermal treatment step of coloring those regions of said overcoating layer where said transparent electrodes are not provided; and a step of forming a transparent conductive thin film on said transparent electrodes corresponding to said individual pixels and said overcoating layer, for electrically connecting said transparent electrodes to each other.
Claim 29
Independent Claim
147 words
A method of manufacturing a liquid crystal display device including first and second substrates (2, 52, 4, 54) each having a transparent electrode (12, 62, 17, 69) on an internal surface thereof, and a color filter (18, 68) with a plurality of color portions formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second substrates, said method characterized by comprising: a step of forming at least one coating layer (28, 78, 67) on at least one light-transmitting substrate (8, 58, 60) of said first or second substrate; and a step of forming at least one transparent electrode (12, 62, 69) with a predetermined shape on said coating layer, then subjecting that region of said coating layer which is not covered with said transparent electrode, to thermal treatment to be colored.
Claim 30
Independent Claim
147 words
A method of manufacturing a liquid crystal display device including first and second substrates (2, 52, 4, 54) each having a transparent electrode (12, 62, 17, 69) on an internal surface thereof, and a color filter (18, 68) with a plurality of color portions formed thereon, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second substrates, said method characterized by comprising: a step of forming at least one coating layer (28, 78, 67) on at least one light-transmitting substrate (8, 58, 60) of said first or second substrate; and a step of forming at least one transparent electrode (12, 62, 69) with a predetermined shape on said coating layer, then subjecting that region of said coating layer which is not covered with said transparent electrode, to thermal treatment to be colored.
Claim 31
Independent Claim
128 words
A method of manufacturing a liquid crystal display device including first and second substrates (2, 52, 4, 54) each having a transparent electrode (12, 62, 17, 69) on an internal surface thereof, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second substrates, said method characterized by comprising: a step of forming at least one coating layer (28, 78, 67) consisting of a resin on at least one light-transmitting substrate (8, 58, 60) of said first or second substrate; and a step of forming at least one transparent electrode (12, 62, 69) with a predetermined shape on said coating layer, then subjecting said coating layer to thermal treatment in an atmosphere of oxygen.
Claim 32
Independent Claim
128 words
A method of manufacturing a liquid crystal display device including first and second substrates (2, 52, 4, 54) each having a transparent electrode (12, 62, 17, 69) on an internal surface thereof, a liquid crystal composition (6, 56) sandwiched between said first and second substrates, and driving means for applying a voltage to said first and second substrates, said method characterized by comprising: a step of forming at least one coating layer (28, 78, 67) consisting of a resin on at least one light-transmitting substrate (8, 58, 60) of said first or second substrate; and a step of forming at least one transparent electrode (12, 62, 69) with a predetermined shape on said coating layer, then subjecting said coating layer to thermal treatment in an atmosphere of oxygen.
References Cited (Backward Citations)
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