Liquid crystal display panel
First Claim
Patent Images
1. A liquid crystal display panel comprising:
- first and second substrates,said first substrate having,a transparent insulating substrate;
signal lines and scanning lines arranged on a display region on said transparent insulating substrate, the signal lines and the scanning lines crossing each other to form a matrix;
a common line arranged in parallel with said scanning lines;
an insulating film covering said signal lines, said scanning lines and said common line; and
a lower electrode and an upper electrode arranged in a pixel part surrounded by said scanning lines and said signal lines to oppose to each other in an upper and lower positional relationship on said insulating film,said second substrate being arranged to oppose to said first substrate, whereinsaid common line is arranged to cross a center portion of said pixel part,said pixel part is divided by said common line into first and second regions,said upper electrode has a slit-shaped first opening in said first region and a slit-shaped second opening in said second region,said first opening is formed as being tilted, such that the slit forms a first angle with a reference line which is an extending direction of said common line,said second opening is formed as being tilted, such that the slit forms a second angle line-symmetrically to said first angle with reference to said reference line,said upper electrode and said lower electrode are arranged to be respectively overlaid on edge portions of said scanning lines and said signal lines, the edge portions existing along extending directions of said scanning lines and said signal lines,said second substrate includes a light shield film,said light shield film is formed in a region above a region where said scanning lines and said signal lines are formed in said pixel section, to extend along the region where said scanning lines and signal lines are formed,in a region where a first contact hole penetrating through at least said insulating film to reach a surface of said common line is formed and a region nearby, said light shield film is formed in a region corresponding to above at least a region extending outward from a top edge portion of the first contact hole,said light shield film does not extend over an entirety of said common line, andsaid light shield film covers ends of said slit-shaped first opening and said slit-shaped second opening on both sides of said pixel part.
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Abstract
A liquid crystal display panel includes signal lines, scanning lines, a common line, and a planarizing film covering the lines. Pattern edge portions of a pixel electrode are arranged to be overlaid above edge portions of the signal lines and the scanning lines. Further, slits being openings formed at the pixel electrode are formed line-symmetrically to each other relative to a reference line which is the extending direction of the common line arranged to cross the center portion of a pixel part.
10 Citations
13 Claims
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1. A liquid crystal display panel comprising:
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first and second substrates, said first substrate having, a transparent insulating substrate; signal lines and scanning lines arranged on a display region on said transparent insulating substrate, the signal lines and the scanning lines crossing each other to form a matrix; a common line arranged in parallel with said scanning lines; an insulating film covering said signal lines, said scanning lines and said common line; and a lower electrode and an upper electrode arranged in a pixel part surrounded by said scanning lines and said signal lines to oppose to each other in an upper and lower positional relationship on said insulating film, said second substrate being arranged to oppose to said first substrate, wherein said common line is arranged to cross a center portion of said pixel part, said pixel part is divided by said common line into first and second regions, said upper electrode has a slit-shaped first opening in said first region and a slit-shaped second opening in said second region, said first opening is formed as being tilted, such that the slit forms a first angle with a reference line which is an extending direction of said common line, said second opening is formed as being tilted, such that the slit forms a second angle line-symmetrically to said first angle with reference to said reference line, said upper electrode and said lower electrode are arranged to be respectively overlaid on edge portions of said scanning lines and said signal lines, the edge portions existing along extending directions of said scanning lines and said signal lines, said second substrate includes a light shield film, said light shield film is formed in a region above a region where said scanning lines and said signal lines are formed in said pixel section, to extend along the region where said scanning lines and signal lines are formed, in a region where a first contact hole penetrating through at least said insulating film to reach a surface of said common line is formed and a region nearby, said light shield film is formed in a region corresponding to above at least a region extending outward from a top edge portion of the first contact hole, said light shield film does not extend over an entirety of said common line, and said light shield film covers ends of said slit-shaped first opening and said slit-shaped second opening on both sides of said pixel part. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A liquid crystal display panel comprising:
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first and second substrates, said first substrate having, a transparent insulating substrate; signal lines and scanning lines arranged on a display region on said transparent insulating substrate, the signal lines and the scanning lines crossing each other to form a matrix; a common line arranged in parallel with said scanning lines; an insulating film covering said signal lines, said scanning lines and said common line; and a lower electrode and an upper electrode arranged in a pixel part surrounded by said scanning lines and said signal lines to oppose to each other in an upper and lower positional relationship on said insulating film, said second substrate being arranged to oppose to said first substrate, wherein said common line is arranged to cross a center portion of said pixel part, said pixel part is divided by said common line into first and second regions, said upper electrode has a slit-shaped first opening in said first region and a slit-shaped second opening in said second region, said first opening is formed as being tilted, such that the slit forms a first angle with a reference line which is an extending direction of said common line, said second opening is formed as being tilted, such that the slit forms a second angle line-symmetrically to said first angle with reference to said reference line, said upper electrode and said lower electrode are arranged to be respectively overlaid on edge portions of said scanning lines and said signal lines, the edge portions existing along extending directions of said scanning lines and said signal lines, said second substrate includes a light shield film, said light shield film is formed in a region above a region where said scanning lines and said signal lines are formed in said pixel section, to extend along the region where said scanning lines and signal lines are formed, in a region where a first contact hole penetrating through at least said insulating film to reach a surface of said common line is formed and a region nearby, said light shield film is formed in a region corresponding to above at least a region extending outward from a top edge portion of the first contact hole, said light shield film does not extend over an entirety of said common line, said liquid crystal display panel further comprises; a liquid crystal layer interposed between said first substrate and said second substrate; a biaxial retardation film disposed on a light incident side for said liquid crystal layer; a first polarizer arranged externally to said biaxial retardation film; and a second polarizer arranged on an opposite side to said first polarizer having said liquid crystal layer interposed therebetween, wherein an alignment direction of said liquid crystal layer is set in a direction parallel to the extending direction of said common line, a slow axis of said biaxial retardation film is set to be in one of a direction parallel to the alignment direction of said liquid crystal layer and a direction perpendicular to the alignment direction of said liquid crystal layer, and one of absorption axes of said first and second polarizers is set to be in a direction parallel to the alignment direction of said liquid crystal layer, while other one of the absorption axes of said first and second polarizers is set to be in a direction perpendicular to the alignment direction of said liquid crystal layer. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification
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Current AssigneeTrivale Technologies, LLC (Vector Capital Corporation)
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Original AssigneeMitsubishi Electric Corporation
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InventorsYonemura, Koji, Nagano, Shingo
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Primary Examiner(s)Nguyen, Thanh-Nhan P.
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Assistant Examiner(s)PAN, JIA X
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Application NumberUS14/072,383Publication NumberTime in Patent Office875 DaysField of Search349/110US Class Current1/1CPC Class CodesG02F 1/133512 Light shielding layers, e.g...G02F 1/133707 Structures for producing di...G02F 1/133757 with different alignment or...G02F 1/134309 characterised by their geom...G02F 1/134372 for fringe field switching ...G02F 1/136209 Light shielding layers, e.g...G02F 1/136286 Wiring, e.g. gate line, dra...G02F 2201/40 Arrangements for improving ...
