EP0381428A2
Expired / Lapsed
EP
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Active matrix substrate and active matrix display display apparatus
Assignee: Sharp Corp
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Filing: 1990-01-30
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Granted: —
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Expires: 2010-01-30
Abstract
Abstract In an active matrix substrate, each of the picture element electrodes (8) disposed in a matrix on a substrate (24), is divided into part electrodes (20, 21), and an electrically conductive film (46) on which two of said part electrodes (20, 21) adjacent to each other are superposed in a manner to sandwich an insulating film (28) therebetween so as to form a connection location (58). If there is a picture element defect due to a fault in a driver transistor (44 or 45), the connection location (58) is irradiated with laser beams (49, 50) from the outside of the display apparatus, so that both part electrodes (20, 21) can be electrically connected to each other, thereby attaining a correction of the picture element defect.
Inventors
- 👤 Mikio Katayama
- 👤 Hiroaki Kato
- 👤 Takayoshi Nagayasu
- 👤 Akihiko Imaya
- 👤 Hidenori Negoto
- 👤 Yuzuru Kanemori
- 👤 Toshihiko Hirobe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 04:22
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/136; G02F1/1362; G02F1/13624; G09; G09F; G09F3/00; G02F1/1333; G02F1/133345; G09G; G09G3/00; G02F1/1306; G02F1/1309; G02F1/1343; G02F1/134309; G02F1/134345; G02F1/136259
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
109 words
An active matrix substrate comprising picture element electrodes (8) disposed in a matrix on an insulating substrate (24), each of said picture element electrodes (8) being directed into a plurality of part electrodes (20, 21), and an electrically conductive film (46) over which a portion of each of the two of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein each of said portions of the two part electrodes (20, 21) and said electrically conductive film (46) are disposed so as to sandwich an insulating film (28) therebetween in a non-conductive state, resulating in a location (58) at which a connection can be established.
Claim 2
Dependent Claim
109 words
An active matrix substrate comprising picture element electrodes (8) disposed in a matrix on an insulating substrate (24), each of said picture element electrodes (8) being directed into a plurality of part electrodes (20, 21), and an electrically conductive film (46) over which a portion of each of the two of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein each of said portions of the two part electrodes (20, 21) and said electrically conductive film (46) are disposed so as to sandwich an insulating film (28) therebetween in a non-conductive state, resulating in a location (58) at which a connection can be established.
Claim 3
Dependent Claim
60 words
An active matrix substrate according to claim 1, wherein a pair of metal pieces (47, 48), respectively, are disposed between one of said portions of the two part electrodes (20, 21) and said insulating film (28) and between the other of said portions of the two part electrodes (20, 21) and said insulating film (28) at said connection location (58).
Claim 4
Dependent Claim
40 words
An active matrix substrate according to claim 2, wherein a hole (52) is disposed in a portion of said insulating film (28) positioned between one (48) of said pair of metal pieces (47, 48) and said electrically conductive film (46).
Claim 5
Dependent Claim
178 words
An active matrix display apparatus comprising a pair of substrates (24, 36) at least one (24) of which is translucent, a display medium (41) which is charged between said pair of substrates (24, 26), the optical characteristics of said display medium being modulated in response to an applied voltage, picture element electrodes (8) disposed in a matrix on one (24) of said substrates, each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), and an electrically conductive film (46) over which a portion of each of the two of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein each of said portions of the two part electrodes (20, 21) and said electrically conductive film (46) are disposed so as to sandwich an insulating film (28) therebetween in a non-conductive state, resulting in a location (58) at which a connection can be established, said connection location (58) being coated by a protective coat (34) by which said connection location (58) is isolated from said display medium (41).
Claim 6
Dependent Claim
178 words
An active matrix display apparatus comprising a pair of substrates (24, 36) at least one (24) of which is translucent, a display medium (41) which is charged between said pair of substrates (24, 26), the optical characteristics of said display medium being modulated in response to an applied voltage, picture element electrodes (8) disposed in a matrix on one (24) of said substrates, each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), and an electrically conductive film (46) over which a portion of each of the two of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein each of said portions of the two part electrodes (20, 21) and said electrically conductive film (46) are disposed so as to sandwich an insulating film (28) therebetween in a non-conductive state, resulting in a location (58) at which a connection can be established, said connection location (58) being coated by a protective coat (34) by which said connection location (58) is isolated from said display medium (41).
Claim 7
Dependent Claim
61 words
An active matrix display apparatus according to claim 4, wherein a pair of metal pieces (47, 48) respectively, is disposed between one of said portions of the two part electrodes (20, 21) and said insulating film (28) and between the other of said portions of the two part electrodes (20, 21) and said insulating film (28) at said connection location (58).
Claim 8
Dependent Claim
39 words
An active matrix display apparatus according to claim 5, wherein there is a hole (52) in a portion of said inulating film (28) positioned between one (48) of said pair of metal pieces and said electrically conductive film (46).
Claim 9
Dependent Claim
179 words
An active matrix display apparatus comprising picture element electrodes (8) disposed in a matrix on one substrate (24), each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), and an electrically conductive film (59) on which a portion of each of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein said two picture element electrodes overlap each other so as to sandwich an insulating film (28) therebetween in a non-conductive state at the portion where said two part electrodes (20, 21) are adjacent to each other, said electrically conductive film (59) being electrically connected with one of said portions of the two part electrodes (20, 21) and disposed to face the other portion of said two part electrodes (20, 21) so as to sandwich said insulating film (28) in a non-conductive state, resulting in a location (58) at which a connection can be established, said correction location (58) being coated by a protective coat (34) by which said connection location (58) is isolated from said display medium.
Claim 10
Dependent Claim
179 words
An active matrix display apparatus comprising picture element electrodes (8) disposed in a matrix on one substrate (24), each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), and an electrically conductive film (59) on which a portion of each of said part electrodes (20, 21) that are adjacent to each other is superposed, wherein said two picture element electrodes overlap each other so as to sandwich an insulating film (28) therebetween in a non-conductive state at the portion where said two part electrodes (20, 21) are adjacent to each other, said electrically conductive film (59) being electrically connected with one of said portions of the two part electrodes (20, 21) and disposed to face the other portion of said two part electrodes (20, 21) so as to sandwich said insulating film (28) in a non-conductive state, resulting in a location (58) at which a connection can be established, said correction location (58) being coated by a protective coat (34) by which said connection location (58) is isolated from said display medium.
Claim 11
Dependent Claim
242 words
An active matrix display apparatus comprising a pair of substrates (24, 36) at least one of which is translucent, a display medium (41) charged between said pair of substrates (24, 26), the optical characteristics of said display medium (41) being modulated in response to an applied voltage, and picture element electrodes (8) disposed in a matrix on the inner surface of one (24) of said substrates, each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), wherein each of said part electrodes (20, 21) comprises an upper layer part electrodes (20b, 21b) and a lower layer part electrodes (20a, 21a); at the portion where said two part electrodes (20, 21) are disposed adjacent to each other, said lower layer part electrode (20a) of one (20) of said part electrodes and said upper layer part electrode (21b) of the other (21) of said part electrodes overlap each other so as to sandwich an insulating film (28) therebetween in a non- conductive state; an electrically conductive film (59) is disposed so that it faces each of said upper layer part electrodes (20b, 21b) at said two part electrodes (20, 21) so as to sandwich said insulating film (28) therebetween in a non-conductive state, resulting in a location (58) at which a connection can be established; and said connection location (58) is coated by a protective coat (34) so as to be isolated from said display medium (41).
Claim 12
Dependent Claim
242 words
An active matrix display apparatus comprising a pair of substrates (24, 36) at least one of which is translucent, a display medium (41) charged between said pair of substrates (24, 26), the optical characteristics of said display medium (41) being modulated in response to an applied voltage, and picture element electrodes (8) disposed in a matrix on the inner surface of one (24) of said substrates, each of said picture element electrodes (8) being divided into a plurality of part electrodes (20, 21), wherein each of said part electrodes (20, 21) comprises an upper layer part electrodes (20b, 21b) and a lower layer part electrodes (20a, 21a); at the portion where said two part electrodes (20, 21) are disposed adjacent to each other, said lower layer part electrode (20a) of one (20) of said part electrodes and said upper layer part electrode (21b) of the other (21) of said part electrodes overlap each other so as to sandwich an insulating film (28) therebetween in a non- conductive state; an electrically conductive film (59) is disposed so that it faces each of said upper layer part electrodes (20b, 21b) at said two part electrodes (20, 21) so as to sandwich said insulating film (28) therebetween in a non-conductive state, resulting in a location (58) at which a connection can be established; and said connection location (58) is coated by a protective coat (34) so as to be isolated from said display medium (41).
Claim 13
Dependent Claim
38 words
An active matrix display apparatus according to claim 8, wherein a pair of metal pieces (67, 68) is disposed at said connection location (58) between said two upper layer part electrodes (20b, 21b) and said insulating film (28).
Claim 14
Dependent Claim
39 words
An active matrix display apparatus according to claim 8, wherein said lower layer part electrode (21a) of one of said two adjacent divided electrodes and said electrically conductive film (59) are previously electrically connected at said connection location (58).
Claim 15
Dependent Claim
251 words
An active matrix display apparatus comprising a pair of substrates (101, 120) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), a first bus wiring (103) disposed between said pair of part electrodes (105a, 105b), and a second bus wiring (104) crossing said first bus wiring (103), wherein a connection region (107) comprises a pair of electrical conductor layers (126a, 126b) disposed at both sides of said first bus wiring (103) and extending parallel thereto, a pair of electrical conductor pieces (127a, 127b) superposed on portions of said electrical conductor layers (126a, 126b) so as to sandwich an insulating film (111) therebetween in a non-conductive state, respectively, portions of said part electrodes (105a, 105b) superposed on said electrical conductor pieces (127a, 127b) in a conductive state respectively, and a spare wiring (128) crossing said first bus wiring (103) so as to sandwich said insulating film (111) therebetween, said spare wiring (128) being superposed on said electrical conductor layers (126a, 126b) so as to sandwich said insulating film (111) therebetween in a non-conductive state, and said connection region being coated by a protective coat (117) so as to be isolated from said display medium (118).
Claim 16
Dependent Claim
251 words
An active matrix display apparatus comprising a pair of substrates (101, 120) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), a first bus wiring (103) disposed between said pair of part electrodes (105a, 105b), and a second bus wiring (104) crossing said first bus wiring (103), wherein a connection region (107) comprises a pair of electrical conductor layers (126a, 126b) disposed at both sides of said first bus wiring (103) and extending parallel thereto, a pair of electrical conductor pieces (127a, 127b) superposed on portions of said electrical conductor layers (126a, 126b) so as to sandwich an insulating film (111) therebetween in a non-conductive state, respectively, portions of said part electrodes (105a, 105b) superposed on said electrical conductor pieces (127a, 127b) in a conductive state respectively, and a spare wiring (128) crossing said first bus wiring (103) so as to sandwich said insulating film (111) therebetween, said spare wiring (128) being superposed on said electrical conductor layers (126a, 126b) so as to sandwich said insulating film (111) therebetween in a non-conductive state, and said connection region being coated by a protective coat (117) so as to be isolated from said display medium (118).
Claim 17
Dependent Claim
239 words
An active matrix display apparatus comprising a pair of substrates (101, 102) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), a first bus wiring (103) disposed between said pair of part electrodes (105a, 105b), and a second bus wiring (104) crossing said first bus wiring, wherein a connection region (107) comprises a pair of electrical conductor layers (126a, 126b) disposed at both sides of said first bus wiring (103) and extending parallel thereto, a pair of branch ends (129a, 129b) of said second bus wiring (104) superposed on one end of each of said electrical conductor layers (126a, 126b) so as to sandwich an insulating film (111) therebetween in a non-conductive state respectively, and a spare wiring (128) crossing said first bus wiring (103) so as to sandwich said insulating film (111) therebetween, said spare wiring (128) being superposed on said electrical conductor layers (126a, 126b) so as to sandwich said insulating film (111) therebetween in a non-conductive state, and said connection region (107) being coated by a protective coat (117) so as to be isolated from said display medium (118).
Claim 18
Dependent Claim
239 words
An active matrix display apparatus comprising a pair of substrates (101, 102) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), a first bus wiring (103) disposed between said pair of part electrodes (105a, 105b), and a second bus wiring (104) crossing said first bus wiring, wherein a connection region (107) comprises a pair of electrical conductor layers (126a, 126b) disposed at both sides of said first bus wiring (103) and extending parallel thereto, a pair of branch ends (129a, 129b) of said second bus wiring (104) superposed on one end of each of said electrical conductor layers (126a, 126b) so as to sandwich an insulating film (111) therebetween in a non-conductive state respectively, and a spare wiring (128) crossing said first bus wiring (103) so as to sandwich said insulating film (111) therebetween, said spare wiring (128) being superposed on said electrical conductor layers (126a, 126b) so as to sandwich said insulating film (111) therebetween in a non-conductive state, and said connection region (107) being coated by a protective coat (117) so as to be isolated from said display medium (118).
Claim 19
Dependent Claim
60 words
An active matrix display apparatus according to claim 11, wherein at said connection region (107), one end of each of said electrical conductor layers (126a, 126b) and each of said pair of branch ends (129a, 129b) of said second bus wiring (104) are superposed on each other so as to sandwich said insulating film (111) therebetween in a non-conductive state.
Claim 20
Dependent Claim
187 words
An active matrix display apparatus comprising a pair of substrates (101, 120) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), and bus wiring (103) disposed between said pair of part electrodes (105a, 105b), wherein a connection location (143) comprises an electrically conductive film (144) superposed on part electrodes (105b, 105a) of two of said picture element electrodes (105) adjacent to each other, a pair of metal pieces (135a, 145b) superposed on both ends of said electrically conductive film (144) so as to sandwich an insulating film (111) therebetween in a non-conductive state, portions of said part electrodes (105b, 105a) being superposed conductively on said metal pieces (145a, 145b), said connection location (143) being covered by a protective film (117) so as to be isolated from said display medium (118).
Claim 21
Dependent Claim
187 words
An active matrix display apparatus comprising a pair of substrates (101, 120) at least one of which is translucent, a display medium (118) charged between said substrates (101, 120), the optical characteristics of said display medium (118) being modulated in response to an applied voltage, picture element electrodes (105) disposed in a matrix on one (101) of said pair of substrates, each of said picture element electrodes (105) being divided into a pair of part electrodes (105a, 105b), and bus wiring (103) disposed between said pair of part electrodes (105a, 105b), wherein a connection location (143) comprises an electrically conductive film (144) superposed on part electrodes (105b, 105a) of two of said picture element electrodes (105) adjacent to each other, a pair of metal pieces (135a, 145b) superposed on both ends of said electrically conductive film (144) so as to sandwich an insulating film (111) therebetween in a non-conductive state, portions of said part electrodes (105b, 105a) being superposed conductively on said metal pieces (145a, 145b), said connection location (143) being covered by a protective film (117) so as to be isolated from said display medium (118).
Claim 22
Dependent Claim
94 words
An active matrix display apparatus according to claim 11, 12 or 13, wherein a connection location comprises an electrically conductive film superposed on said part electrodes constituting said picture element electrodes adjacent to each other, a pair of metal pieces superposed on both ends of said electrically conductive film so as to sandwich said insulating film therebetween in a non-conductive state, and portions of said part electrodes superposed on said metal pieces in a conductive state, said connection location being coated by a protective film so as to be isolated from said display medium.
References Cited (Backward Citations)
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