EP0434220A2
Expired / Lapsed
EP
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Colour liquid crystal display device
Assignee: Sharp Corp
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Filing: 1990-11-20
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Granted: —
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Expires: 2010-11-20
Abstract
Abstract In a color liquid crystal display device (1), the shape of a color filter (3) cannot be seen and coloring of areas other than a display area due to leaking light is prevented. In a color liquid crystal display device (21), by making a first and second segment electrodes (23,26) in a two layer constrtiction, it becomes possible to display two different display image planes in different colors with only the single layer type color liquid crystal display device (21). In a color liquid crystal display device (41), sufficient contrast can be obtain by using a liquid crystal element (43) for compensation. In a color liquid crystal display device (61), it is possible to display two kinds of display image planes, namely a color display image plane and a black and white display image plane. In a color liquid crystal display device (91), two kinds of color display image planes can be displayed because the color liquid crystal display device (91) is made in a two layered construction. In a color liquid crystal display device (121), so-called normally black display and normally white display can be switched, also when the display state is switched between normally black display and normally white display, the background color changes and it is possible to maintain the same display color. Further a display colors can be doubled as compared to the example of the prior art.
Inventors
- 👤 Hiroshi Fukutani
- 👤 Kunihiko Ito
- 👤 Kazuhiko Akimoto
- 👤 Mitsuaki Shioji
- 👤 Hiroshi Takanashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3607; G02F1/133; G02F1/1333; G02F1/1335; G02F1/133509; G02F1/133514; G02F1/1347; G02F1/13471; G02F1/137; G02F1/139; G02F1/1396
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
Color liquid crystal display device (1) comprising: pair of light-transmissive substrates (2a, 2b) with a liquid crystal layer (7) between them; plurality of color selection members (3) disposed over the entire surface along one side in the direction of thickness of the light-transmissive substrates (2a, 2b) and which select one color for the transmitted light from among a plurality of predetermined colors; and display electrodes (4, 6) transmissive to light disposed in the display area of the light-transmissive substrate (2a, 2b) on the side toward the liquid crystal layer (7) and formed in a range corresponding to the plurality of color selection members (3) selected according to a predetermined color to be displayed in the display area.
Claim 2
Dependent Claim
117 words
Color liquid crystal display device (1) comprising: pair of light-transmissive substrates (2a, 2b) with a liquid crystal layer (7) between them; plurality of color selection members (3) disposed over the entire surface along one side in the direction of thickness of the light-transmissive substrates (2a, 2b) and which select one color for the transmitted light from among a plurality of predetermined colors; and display electrodes (4, 6) transmissive to light disposed in the display area of the light-transmissive substrate (2a, 2b) on the side toward the liquid crystal layer (7) and formed in a range corresponding to the plurality of color selection members (3) selected according to a predetermined color to be displayed in the display area.
Claim 3
Dependent Claim
134 words
A color liquid crystal display device (21) comprising: a pair of transparent substrates (22a, 22b) with a liquid crystal layer (29) provided between them; a plurality of color selection members (3) each of which select one color for the transmitted light from among a plurality of predetermined colors, and are provided across the entire surface of one side of the transparent substrates (22a, 22b) in their direction of thickness; and a plurality of transparent display electrodes (23, 26, 28) provided in the display area of the transparent substrates (22a, 22b) on the side of the liquid crystal layer (29), and each of which are formed in the range corresponding to the plurality of color selection members (3) which are selected corresponding to the predetermined colors that are to be displayed in the display area.
Claim 4
Dependent Claim
134 words
A color liquid crystal display device (21) comprising: a pair of transparent substrates (22a, 22b) with a liquid crystal layer (29) provided between them; a plurality of color selection members (3) each of which select one color for the transmitted light from among a plurality of predetermined colors, and are provided across the entire surface of one side of the transparent substrates (22a, 22b) in their direction of thickness; and a plurality of transparent display electrodes (23, 26, 28) provided in the display area of the transparent substrates (22a, 22b) on the side of the liquid crystal layer (29), and each of which are formed in the range corresponding to the plurality of color selection members (3) which are selected corresponding to the predetermined colors that are to be displayed in the display area.
Claim 5
Dependent Claim
196 words
A color liquid crystal display device (41) made by the stacking of a first and second liquid crystal element (42, 43) each having a pair of transparent substrates (44a, 44b; 51a, 51b): the first liquid crystal element (42) comprising, a first liquid crystal layer (49) wherein the liquid crystal molecules are oriented in a spiral shape in a predetermined orientation direction, a plurality of color selection members (3) provided across the entire surface of the display area, each of which select one color for the transmitted light from among a plurality of predetermined colors, and transparent display electrodes (46, 48) provided within the display area of the first liquid crystal layer (49) side, and which are formed in the range that corresponds to the plurality of color selection members (3) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (43) comprising, a second liquid crystal layer (53) wherein the liquid crystal molecules are oriented in a reverse twist, so that they are in a direction opposite to the orientation direction of the liquid crystal molecules of the first liquid crystal layer (49).
Claim 6
Dependent Claim
196 words
A color liquid crystal display device (41) made by the stacking of a first and second liquid crystal element (42, 43) each having a pair of transparent substrates (44a, 44b; 51a, 51b): the first liquid crystal element (42) comprising, a first liquid crystal layer (49) wherein the liquid crystal molecules are oriented in a spiral shape in a predetermined orientation direction, a plurality of color selection members (3) provided across the entire surface of the display area, each of which select one color for the transmitted light from among a plurality of predetermined colors, and transparent display electrodes (46, 48) provided within the display area of the first liquid crystal layer (49) side, and which are formed in the range that corresponds to the plurality of color selection members (3) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (43) comprising, a second liquid crystal layer (53) wherein the liquid crystal molecules are oriented in a reverse twist, so that they are in a direction opposite to the orientation direction of the liquid crystal molecules of the first liquid crystal layer (49).
Claim 7
Dependent Claim
181 words
A color liquid crystal display device (61) made by stacking a first and second liquid crystal element (62, 63) each of which have a liquid crystal layer (69, 73) provided between a pair of transparent substrates (64a, 64b; 71a, 71b): the first liquid crystal element (69) comprising, a plurality of color selection members (3) provided across the entire surface of one side of the transparent substrates (64a, 64b) in their direction of thickness, each of which selects one color for the transmitted light from among a plurality of predetermined colors, and a first display electrode (66, 68) provided within the display area of the liquid crystal layers (69) sides of the transparent substrates (64a, 64b), and which is formed in the range that corresponds to the plurality of color selection members (3) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (63) comprising, a second display electrode (77, 78) formed in the range corresponding to the predetermined shape that is to be displayed in the display area.
Claim 8
Dependent Claim
181 words
A color liquid crystal display device (61) made by stacking a first and second liquid crystal element (62, 63) each of which have a liquid crystal layer (69, 73) provided between a pair of transparent substrates (64a, 64b; 71a, 71b): the first liquid crystal element (69) comprising, a plurality of color selection members (3) provided across the entire surface of one side of the transparent substrates (64a, 64b) in their direction of thickness, each of which selects one color for the transmitted light from among a plurality of predetermined colors, and a first display electrode (66, 68) provided within the display area of the liquid crystal layers (69) sides of the transparent substrates (64a, 64b), and which is formed in the range that corresponds to the plurality of color selection members (3) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (63) comprising, a second display electrode (77, 78) formed in the range corresponding to the predetermined shape that is to be displayed in the display area.
Claim 9
Dependent Claim
230 words
A color liquid crystal display device (91) comprising: a first transparent substrate (92); a plurality of color selection members (3) provided across the entire surface of one side of the first transparent substrate (92) each of which select one color for the transmitted light from among a plurality of predetermined colors; a second transparent substrate (95) arranged on the surface of one side of the first transparent substrate (92); a first liquid crystal layer (100) which is interposed between the first and second transparent substrates (92, 95); a transparent first electrode (97, 99) formed in the range corresponding to the plurality of color selection members (3) that are selected corresponding to the predetermined color to be displayed in the display area, and which is provided within a predetermined display area of the first liquid crystal layer (100) side; a third transparent substrate (102) which is arranged on the surface of the other side of the first transparent substrate (92); a second liquid crystal layer (106) which is interposed between the first and third transparent substrates (92, 102); and a transparent second display electrode (103, 105) formed in the range corresponding to the plurality of color selection members (3) that are selected corresponding to the predetermined color to be displayed in the display area, and which is provided within a predetermined display area of the second liquid crystal layer (106) side.
Claim 10
Dependent Claim
230 words
A color liquid crystal display device (91) comprising: a first transparent substrate (92); a plurality of color selection members (3) provided across the entire surface of one side of the first transparent substrate (92) each of which select one color for the transmitted light from among a plurality of predetermined colors; a second transparent substrate (95) arranged on the surface of one side of the first transparent substrate (92); a first liquid crystal layer (100) which is interposed between the first and second transparent substrates (92, 95); a transparent first electrode (97, 99) formed in the range corresponding to the plurality of color selection members (3) that are selected corresponding to the predetermined color to be displayed in the display area, and which is provided within a predetermined display area of the first liquid crystal layer (100) side; a third transparent substrate (102) which is arranged on the surface of the other side of the first transparent substrate (92); a second liquid crystal layer (106) which is interposed between the first and third transparent substrates (92, 102); and a transparent second display electrode (103, 105) formed in the range corresponding to the plurality of color selection members (3) that are selected corresponding to the predetermined color to be displayed in the display area, and which is provided within a predetermined display area of the second liquid crystal layer (106) side.
Claim 11
Dependent Claim
181 words
A color liquid crystal display device (121) made by stacking a first and second liquid crystal element (122, 123) each of which have a liquid crystal layer (129, 133) provided between a pair of transparent substrates (124a, 124b, 131a, 131b): the first liquid crystal element (122) comprising, a plurality of color selection members (125) provided across the entire surface of one side of the transparent substrates (124a, 124b) in their direction of thickness, each of which selects one color for the transmitted light from among a plurality of predetermined colors, and a transparent display electrode (126a, 126b; 128) provided within the display area of the liquid crystal layer (129) sides of the transparent substrates (124a, 124b), and which is formed in the range that corresponds to the plurality of color selection members (125) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (123) comprising, a transparent electrode (142,143) provided across the entire surface of one side of the transparent substrates (131a, 131b) in its direction of thickness.
Claim 12
Dependent Claim
181 words
A color liquid crystal display device (121) made by stacking a first and second liquid crystal element (122, 123) each of which have a liquid crystal layer (129, 133) provided between a pair of transparent substrates (124a, 124b, 131a, 131b): the first liquid crystal element (122) comprising, a plurality of color selection members (125) provided across the entire surface of one side of the transparent substrates (124a, 124b) in their direction of thickness, each of which selects one color for the transmitted light from among a plurality of predetermined colors, and a transparent display electrode (126a, 126b; 128) provided within the display area of the liquid crystal layer (129) sides of the transparent substrates (124a, 124b), and which is formed in the range that corresponds to the plurality of color selection members (125) that are selected corresponding to the predetermined color that is to be displayed in the display area; and the second liquid crystal element (123) comprising, a transparent electrode (142,143) provided across the entire surface of one side of the transparent substrates (131a, 131b) in its direction of thickness.
Claim 13
Dependent Claim
212 words
A color liquid crystal display device (121) comprising: a first liquid crystal display element (122) interposed a plurality of color selection members (125) which are formed at least in predetermined display areas and each of which select one color for transmitted light from a predetermined plurality of colors, transparent display electrodes (126a, 126b; 128), that are formed for each color selection member (125), and a liquid crystal layer (129) between a pair of transparent substrates (124a, 124b); a second liquid crystal display element (123) interposed a transparent electrode (142, 143) that spans an area at least corresponding to the display area and a liquid crystal layer (133) between a pair of transparent substrates (131a, 131b); a first drive means (140) which applies/does not apply a display signal to the second liquid crystal display element (123); and a second drive means (141) which selects the color selection members (125) that realize the same color as that of the color selection members (125) selected when the display signal is applied/not applied, and which corresponds to the application/non-application operation of the display signal of the first drive means (140) with respect to the color selection members (125) selected when the display signal is applied/not applied, at the time when the display signal is not applied/applied.
Claim 14
Dependent Claim
212 words
A color liquid crystal display device (121) comprising: a first liquid crystal display element (122) interposed a plurality of color selection members (125) which are formed at least in predetermined display areas and each of which select one color for transmitted light from a predetermined plurality of colors, transparent display electrodes (126a, 126b; 128), that are formed for each color selection member (125), and a liquid crystal layer (129) between a pair of transparent substrates (124a, 124b); a second liquid crystal display element (123) interposed a transparent electrode (142, 143) that spans an area at least corresponding to the display area and a liquid crystal layer (133) between a pair of transparent substrates (131a, 131b); a first drive means (140) which applies/does not apply a display signal to the second liquid crystal display element (123); and a second drive means (141) which selects the color selection members (125) that realize the same color as that of the color selection members (125) selected when the display signal is applied/not applied, and which corresponds to the application/non-application operation of the display signal of the first drive means (140) with respect to the color selection members (125) selected when the display signal is applied/not applied, at the time when the display signal is not applied/applied.
Claim 15
Dependent Claim
209 words
A color liquid crystal display device (121) comprising: a first liquid crystal display element (122) interposed a plurality of color selection members (125) which are formed at least in predetermined display areas and each of which select one color for transmitted light from a predetermined plurality of colors, transparent display electrodes (126a, 126b; 128), that are formed for each color selection member (125), and a liquid crystal layer (129) between a pair of transparent substrates (124a, 124b); a second liquid crystal display element (123) interposed a transparent electrode (142, 143), that spans an area at least corresponding to the display area and a liquid crystal layer (133) between a pair of transparent substrates (131a, 131b); a first drive means (141) which selects one of a plurality of colors for transmitted light by applying/not applying the first display signal to all of the display electrodes (126a, 126b; 128) of the first liquid crystal display elements (122); and a second drive means (140) which selects one of the plurality of colors, or its complementary color, for the colored transmitted light from the first liquid crystal display element (122) by applying/not applying the second display signal to all of the transparent electrodes (142, 143) of the second liquid crystal display element (123).
Claim 16
Dependent Claim
209 words
A color liquid crystal display device (121) comprising: a first liquid crystal display element (122) interposed a plurality of color selection members (125) which are formed at least in predetermined display areas and each of which select one color for transmitted light from a predetermined plurality of colors, transparent display electrodes (126a, 126b; 128), that are formed for each color selection member (125), and a liquid crystal layer (129) between a pair of transparent substrates (124a, 124b); a second liquid crystal display element (123) interposed a transparent electrode (142, 143), that spans an area at least corresponding to the display area and a liquid crystal layer (133) between a pair of transparent substrates (131a, 131b); a first drive means (141) which selects one of a plurality of colors for transmitted light by applying/not applying the first display signal to all of the display electrodes (126a, 126b; 128) of the first liquid crystal display elements (122); and a second drive means (140) which selects one of the plurality of colors, or its complementary color, for the colored transmitted light from the first liquid crystal display element (122) by applying/not applying the second display signal to all of the transparent electrodes (142, 143) of the second liquid crystal display element (123).
Claim 17
Dependent Claim
73 words
A color liquid crystal display device (1, 21, 41, 61, 91, 121) as claimed in one of the claims 1 through 8 in which the shape of the color selection members (3, 125) is quadrilateral and they are arranged in a mosaic pattern, and the display electrodes (4, 23, 26, 46, 66, 97, 103, 126a, 126b) corresponding to the color selection members (3, 125) which select the same color are connected in sequence.
Claim 18
Dependent Claim
109 words
A color liquid crystal display device comprising first and second liquid crystal display elements arranged in stacked configuration, the first said element including an array of color filter elements extending across a display area of the device, display control electrodes within said display area and a first liquid crystal layer with liquid crystal molecules which adopt a spiral twist in one rotational sense, and the second said element including a second liquid crystal layer with liquid crystal molecules which adopt a spiral twist in the opposite sense so as to compensate for ellipticity introduced into the polarization of transmitted light by its passage through said first liquid crystal layer.
Claim 19
Dependent Claim
109 words
A color liquid crystal display device comprising first and second liquid crystal display elements arranged in stacked configuration, the first said element including an array of color filter elements extending across a display area of the device, display control electrodes within said display area and a first liquid crystal layer with liquid crystal molecules which adopt a spiral twist in one rotational sense, and the second said element including a second liquid crystal layer with liquid crystal molecules which adopt a spiral twist in the opposite sense so as to compensate for ellipticity introduced into the polarization of transmitted light by its passage through said first liquid crystal layer.
References Cited (Backward Citations)
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