CN1506722B - Liquid crystal display - Google Patents
Liquid crystal display Download PDFInfo
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- CN1506722B CN1506722B CN 02154021 CN02154021A CN1506722B CN 1506722 B CN1506722 B CN 1506722B CN 02154021 CN02154021 CN 02154021 CN 02154021 A CN02154021 A CN 02154021A CN 1506722 B CN1506722 B CN 1506722B
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Abstract
The liquid crystal display includes the first base board and the second base board via vertical aligning treatment and liquid crystal with negative dielectric constant and anisotropy, with the liquidcrystal being sealed between the first base board and the second base board. One slit array is set on pixel electrode on one of the base boards, and one shading array and one lug array set on the other base board. The lugs in Z-shape are parallel to each other. The slits and the lugs are set alternately. The liquid crystal display features that each of the lugs has several notches formed in the light shading array area.
Description
Technical field
The present invention relates to a kind of LCD, be particularly related to a kind of multiregional vertical align type (multi-domain vertically aligned) LCD, it has specific projection pattern and is used for the processing procedure that liquid crystal injects (one drop fill is called for short ODF).
Background technology
LCD mainly comprises two first and second substrate and liquid crystal layers that are oppositely arranged and is located in therebetween.The processing procedure that the liquid crystal that United States Patent (USP) is disclosed for No. 5263888 injects (onedrop fill is called for short ODF) comprises the coating sticker in the whole periphery of this first substrate, the dispenser method material is in this first substrate, with this second substrate stacked on this first substrate and push this substrate between between this substrate every reaching a predefined value (being typically the 3-10 micron), and solidify this sticker.In pushing the step of this substrate, this liquid crystal material scatters and forms a liquid crystal layer by this with the space that riddles between the substrate.
Vertical orientation (VA) type LCD is a kind of type (mode) of using negative type liquid crystal material and vertical orientation film.Compared to Twisted Nematic LCD, this vertical alignment type liquid crystal display device provides higher contrast, reaction velocity and provide splendid field-of-view angle characteristic to white and black displays faster.Yet it promptly is that its field-of-view angle is narrow that vertical alignment type liquid crystal display device still has a critical shortcoming.This causes vertical alignment type liquid crystal display device limited difficult problem on using.
European patent is announced 0884626-A2 number and is disclosed a multiregional vertical align type (multi-domain vertically aligned) LCD, and it has a plurality of zones and adjusts member in order to improve the performance of its field-of-view angle.Typically, member is adjusted by establishing slit on the pixel electrode of thin film transistor base plate in this zone, and establishes projection and realize on the common electrode of colored optical filtering substrates.The figure of this projection is continuous and the projection in all pixels disposes in roughly the same mode.This projection typically has the height of about 1-2 μ m.Multi-region vertical nematic LCD for having than small gap (gap) (3-3.9 μ m) design is divided into about 2-2.9 μ m between this projection and this thin film transistor base plate.If this multi-region vertical nematic LCD is made by aforesaid ODF processing procedure, there is bubble to sink into to be between the projection of continuous pattern easily.In this case, may find in pushing the step of this substrate, to take place liquid crystal material and scatter not exclusively, thereby between projection, produce bubble.
Summary of the invention
The object of the present invention is to provide a kind of multi-region vertical nematic LCD, it has discontinuous adjustment member and can overcome or improve aforementioned prior art problems at least.
In order to reach purpose of the present invention and other effect, LCD according to the present invention comprises first substrate and second substrate of handling through vertical orientation, one liquid crystal layer is located between this first and second substrate, and discontinuous adjustment member is located at least this first and second substrate on one of them.The liquid crystal molecule that this liquid crystal layer comprises is not roughly having the main surface that is approximately perpendicular to this first substrate when electric field puts on this liquid crystal layer.This discontinuous adjustment member is adjusted the orientation (orientation) of this liquid crystal layer, makes that the liquid crystal molecule in each pixel is tilted orientation and makes this orientation comprise a plurality of directions when voltage applies.Formed discontinuous pattern since should adjust member, and be trapped in bubble between this first and second substrate and can pass this adjustments member easily and discharge, so reduce the generation probability of bubble significantly.
For reaching above-mentioned purpose, a technological means provided by the invention is expressed as follows:
A kind of LCD is characterized in that, this LCD comprises:
Through one first substrate and one second substrate that vertical orientation is handled, this second substrate and the first substrate upper and lower settings;
One liquid crystal layer is located between this first and second substrate, and this liquid crystal layer comprises when no electric field puts on this liquid crystal layer the liquid crystal molecule perpendicular to the main surface of this first substrate; Many
A plurality of parallel gate polar curves and a plurality of panel data line perpendicular to this gate line are arranged on this first substrate;
A plurality of pixel electrodes are arranged on this first substrate, and each pixel electrode has first edge and second edge, and wherein first edge is parallel to this gate line, and second edge is parallel to
This data line;
First projection of an arrayed, be located on this second substrate, each first projection has a main body that is " it " word pattern, and be parallel to each other between each main body, the main body of wherein said first projection is for being crisscross arranged, and each first projection has a plurality of breach and is formed at wherein, described first projection also has a plurality of first branched portions and a plurality of second branched portion that is extended by main body, described first branched portion is formed at the position in the face of first edge of this pixel electrode, and described second branched portion is formed at the position in the face of second edge of this pixel electrode, near the pixel electrode first marginal position place per two in the face of between the first adjacent branched portion and define a groove between first substrate and second substrate;
A plurality of second projections are arranged on this second substrate, and described second projection is formed on the position near described groove.
For reaching above-mentioned purpose, another technological means provided by the invention is expressed as follows:
A kind of colored optical filtering substrates, be used for forming a LCD with a thin film transistor base plate, the thin film transistor (TFT) base is first substrate, colored optical filtering substrates is second substrate, this second substrate and the first substrate upper and lower settings, this thin film transistor base plate have the slit of a plurality of pixel electrodes and an arrayed to be located on this pixel electrode, and each pixel electrode has first edge and second edge, it is characterized in that this colored optical filtering substrates comprises:
First projection of an arrayed, each first projection has a main body that is " it " word pattern, and parallel to each other between each main body, and the main body of the slit of this thin film transistor base plate and this first projection is for being crisscross arranged,
Wherein each first projection has a plurality of breach and is formed at wherein;
Described first projection also has a plurality of first branched portions and a plurality of second branched portion that is extended by main body, described first branched portion is formed at the position in the face of first edge of this pixel electrode, and described second branched portion is formed at the position in the face of second edge of this pixel electrode, near the pixel electrode first marginal position place per two in the face of between the first adjacent branched portion and define a groove between first and second substrates; And
A plurality of second projections are arranged on this second substrate, and described second projection is formed on the position near described groove.
Discontinuous adjustment member of the present invention realizes by first projection of an arrayed and slit, and wherein each first projection has a plurality of breach and is formed at wherein.This first protrusion-shaped is formed on this second substrate, and wherein each first projection has a main body and is set to roughly be " it " word pattern and parallel to each other.This slit is located on the pixel electrode on this first substrate, makes the main body of this slit and this first projection be crisscross arranged.The bubble that the breach of this first projection allows to be trapped between this first projection can pass discharge easily, therefore reduces the generation probability of bubble significantly.In addition, in the step of pushing this substrate of ODF processing procedure, the liquid crystal material that the breach of this first projection allows to instil scatters more equably, makes this liquid crystal material fully fill up the depression that forms between two substrates.Yet,, be chaotic in the orientation of this gap edge liquid crystal molecule since the figure of this first projection is discontinuous.This causes and produce disclination (disclination) near breach.Therefore all breach can be designed to have predefined size to reach good gas discharge and minimum is reduced in disclination.In addition, all breach can be formed at the light that forms on second substrate and cover in the zone of array, cover the light leak that for example disclination of display quality of deterioration is caused by this effectively.
Generally speaking, this first substrate can have a plurality of gate lines that are set parallel to each other and a plurality of data line that is set parallel to each other perpendicular to this gate line.This pixel electrode has first edge that is parallel to gate line and second edge that is parallel to data line.This light covers array to have a plurality of files and extends and a plurality of line is extended along gate line along data line.Therefore, all breach can be designed to be arranged in zone that this light covers the line of array and/or file and makes and extend across line and/or the file that this light covers array without any this first projection.
Preferably, this first projection can have a plurality of first branched portions and is formed in the face of the position at first edge of this pixel electrode and a plurality of second branched portion and is formed at position in the face of second edge of this pixel electrode.In this embodiment, the orientation (i.e. the mean direction of this long axis of liquid crystal molecule) of the liquid crystal molecule between around branched portion and slit is reduced to maximum 45 degree significant difference.This border that is suppressed at effectively between slit and the pixel electrode edge produces disclination, therefore avoids the display defect that causes because of disclination.
According to embodiments of the invention, this second substrate comprises a plurality of second protrusion-shaped in addition and is formed in the groove that is defined by two first branched portions that extend from adjacent first projection body and this first and second substrate.
According to embodiments of the invention, this second substrate comprises a plurality of the 3rd projections in addition and is formed on position near a groove that is defined by two first branched portions that extend from adjacent first projection body and this first and second substrate.
For allow state on the present invention with other purpose, feature and advantage can be more obvious, preferred embodiment of the present invention cited below particularly, and cooperate appended icon is described in detail below.
Description of drawings
Fig. 1 a: according to the partial plan of the multi-region vertical nematic LCD of first embodiment of the invention, it discloses special projection pattern;
Fig. 1 b: be the planimetric map of the multi-region vertical nematic LCD of Fig. 1 a, it discloses special projection and slit pattern;
Fig. 2: according to the partial plan of the multi-region vertical nematic LCD of second embodiment of the invention, it discloses special projection pattern;
Fig. 3: according to the partial plan of the multi-region vertical nematic LCD of third embodiment of the invention, it discloses special projection pattern;
Fig. 4: according to the partial plan of the multi-region vertical nematic LCD of fourth embodiment of the invention, it discloses special projection pattern;
Fig. 5: according to the partial plan of the multi-region vertical nematic LCD of fifth embodiment of the invention, it discloses special projection pattern; And
Fig. 6: the part cut-away view of multi-region vertical nematic LCD according to an embodiment of the invention.
Symbol description among the figure
100 multi-region vertical nematic LCDs
101 light cover array 101a line
The 101b file
102 second substrate 102a colored filters
103 liquid crystal layers
104 first substrate 104a gate lines
The 104b data line
120 pixel electrode 120a, first edge
120b second edge
130 projection 130a main bodys
130b breach 130c breach
130d branched portion 130e branched portion
132 projections, 134 projections
136 projections
140 slits
200 multi-region vertical nematic LCDs
300 multi-region vertical nematic LCDs
400 multi-region vertical nematic LCDs
Embodiment
The invention provides a multi-region vertical nematic LCD, it has the discontinuous adjustment member that injects processing procedure (for example one drop fill processing procedure) at liquid crystal in order to use.LCD according to the present invention comprises one first substrate and one second substrate is located between this first and second substrate in order to a vertical orientation and a liquid crystal layer.This discontinuous adjustment member is located at least this first and second substrate on one of them.The liquid crystal molecule that this liquid crystal layer comprised is not roughly having the main surface that is approximately perpendicular to this first substrate when electric field puts on this liquid crystal layer.This discontinuous adjustment member is adjusted the orientation (orientation) of this liquid crystal layer, makes that the liquid crystal molecule in each pixel is tilted orientation and makes this orientation comprise a plurality of directions when applying voltage, improves the performance of field-of-view angle by this.Formed discontinuous pattern since should adjust member, and be trapped in bubble between this first and second substrate and can pass this adjustments member easily and discharge, so reduce the generation probability of bubble significantly.
As shown in Figure 6, this LCD mainly comprises one first substrate 104 and one second substrate 102.The surface of described substrate is handled by vertical orientation.One liquid crystal layer 103 with negative permittivity anisotropy (dielectric constant anisotropy) is sealed between this two substrates.Multi-region vertical nematic LCD of the present invention is preferably a kind of Thin Film Transistor-LCD.Typically, this second substrate 102 is called colored optical filtering substrates because of being formed with colored filter 102a, and this first substrate 104 is called as thin film transistor base plate.Generally be provided with distance piece (spacer) (not being shown among the figure) between this substrate in order to define the interval (gap) between this substrate.
Fig. 1 a and 1b disclose the part of a multi-region vertical nematic LCD 100, and it has discontinuous adjustment member, and this discontinuous adjustment member is made of special projection and slit according to the first embodiment of the present invention.This second substrate 102 has a light, and to cover array 101 (not being shown among Fig. 1 b) (a for example light shield layer (BM)) formed thereon.This first substrate 104 is provided with many gate lines parallel to each other (gate line) 104a, many data line 104b parallel to each other, it is perpendicular to this gate line 104a, and a plurality of thin film transistor (TFT)s and pixel electrode 120 (not being shown among Fig. 1 a), this thin film transistor (TFT) and pixel electrode become matrix form to be arranged in the cross section of this gate line 104a and data line 104b.This pixel electrode 120 has first edge 120a that is parallel to gate line 104a and the second edge 120b that is parallel to data line 104b.This LCD 100 is formed with a plurality of projections 130 and slit (slit) l40 (not being shown among Fig. 1 a) in order to adjust the orientation of liquid crystal, makes the configuration of this liquid crystal molecule be directed when imposing a voltage and comprises a plurality of directions.Because the orientation of liquid crystal molecule is a plurality of different directions mutually, so the field-of-view angle of this LCD 100 can significantly increase.These a plurality of projection 130 parallel to each other being located on this second substrate.Each projection 130 mainly has a main body 130a who is bent into " it " font.This slit 140 is located at this pixel electrode 120.Shown in Fig. 1 b, these a plurality of slits 140 are staggered with the main body 130a of projection.
The projection of multi-region vertical nematic LCD 100 has a plurality of breach l30b makes that being trapped in air between this projection 130 can pass this breach 130b easily and discharge, and therefore reduces the generation probability of bubble significantly.
In addition, in the step of pushing this substrate of ODF processing procedure, the liquid crystal material that the breach 130b of this projection l30 allows to instil scatters more equably, makes this liquid crystal material fully fill up the depression that forms between two substrates.Yet,, can become chaotic because of projection 130 at the vergence direction of the liquid crystal molecule at the edge of breach 130b since the figure of this projection 130 is discontinuous.This causes and produce disclination (disclination) near breach 130b edge.Therefore all breach 130b can be designed to have predefined size to reach good gas discharge and minimum is reduced in disclination.In addition, all breach 130b can be formed at light and cover in the zone of array 101, the display quality that the light leak that covers for example disclination effectively by this and caused etc. worsen.
As shown in Figure 1a, this light covers array 101 and has a plurality of line 101a and extend and a plurality of file 101b extends along data line 104b along gate line 104a.All breach 130b can design to be arranged in zone that this light covers the line 101a of array and make and to extend across the line 101a that this light covers array without any this projection 130.In addition, projection of the present invention can have breach 130c (seeing Fig. 5), and all is arranged in the zone that this light covers the file 101b of array, makes this projection 130 all not extend across the file 101b that this light covers array.All breach can be designed to be arranged in this light and cover the line of array and the zone of file, make this projection all not extend across line and file that this light covers array.
Generally speaking, when LCD only was provided with slit 140 and is bent into the projection body 130a of " it " font, its display picture element was understood some situation that presents deepening (darkened).And in pixel, present in the dark zone, the orientation of liquid crystal molecule changes very slowly when imposing voltage.This will reduce contrast and reaction time, thereby display quality is worsened.This is because liquid crystal molecule quite is different from the vergence direction that this slit 140 is caused by the vergence direction that near the electric field pixel electrode 120 edge 120a, the 120b influences (seeing Fig. 1 b) and influenced.Therefore, shown in Fig. 1 b, this projection 130 preferably has a plurality of first branched portion l30d and establishes son and be located at over against the position of pixel electrode 120 second edge 120b over against position and a plurality of second branched portion 130e of pixel electrode 120 first edge 120a.In this embodiment, the orientation (i.e. the mean direction of this long axis of liquid crystal molecule) of the liquid crystal molecule between around branched portion 130d, 130e and slit 140 is reduced to maximum 45 degree significant difference.This border that is suppressed at effectively between slit and the pixel electrode edge produces disclination, therefore avoids the display defect that causes because of disclination.
Fig. 2 is disclosed as a pixel region according to the multi-region vertical nematic LCD 200 of second embodiment of the invention, and this pixel electrode 120 and this slit 140 are not shown in wherein.This LCD 200 comprises a plurality of projections 132 and is formed in the groove that is defined by two first branched portion 130d that extend from the main body 130a of adjacent projection 130 and this substrate 102,104 (not being shown in the figure).In the step of pushing this substrate of ODF processing procedure, this projection 132 makes the liquid crystal material of instillation pass the aforesaid groove speed that is defined in this first branched portion 130d to slow down.
Fig. 3 is disclosed as a pixel region according to the multi-region vertical nematic LCD 300 of third embodiment of the invention, and this pixel electrode 120 and this slit 140 are not shown in wherein.This LCD 300 comprises near the position of left side opening that a plurality of projections 134 are formed at aforesaid groove.In the step of pushing this substrate of ODF processing procedure, this projection l34 makes the liquid crystal material of instillation pass aforesaid groove speed to slow down.
Fig. 4 is disclosed as a pixel region according to the multi-region vertical nematic LCD 400 of fourth embodiment of the invention, and this pixel electrode 120 and this slit 140 are not shown in wherein.This LCD 400 comprises near the position of right openings that a plurality of projections 136 are formed at aforesaid groove.In the step of pushing this substrate of ODF processing procedure, this projection 136 makes the liquid crystal material of instillation pass aforesaid groove speed to slow down.
Then, be described below in order to the processing procedure that forms this projection.Earlier a photoresistance is coated the surface, shift one and preestablish pattern (with reference to the projection pattern shown in Fig. 1-5), develop then and form this projection 130,132,134 and 136.This processing procedure can be implemented easily by known techniques.In addition, this slit 140 can utilize known pixel electrode to form step and form with pixel electrode 120.
Though the present invention discloses with aforementioned preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing various changes and modification, so protection scope of the present invention is as the criterion when the scope that look claim and summary of the invention.
Claims (10)
1. a LCD is characterized in that, this LCD comprises:
Through one first substrate and one second substrate that vertical orientation is handled, this second substrate and the first substrate upper and lower settings;
One liquid crystal layer is located between this first and second substrate, and this liquid crystal layer comprises when no electric field puts on this liquid crystal layer the liquid crystal molecule perpendicular to the main surface of this first substrate;
A plurality of parallel gate polar curves and a plurality of panel data line perpendicular to this gate line are arranged on this first substrate;
A plurality of pixel electrodes are arranged on this first substrate, and each pixel electrode has first edge and second edge, and wherein first edge is parallel to this gate line, and second edge is parallel to this data line;
First projection of an arrayed, be located on this second substrate, each first projection has a main body that is " it " word pattern, and be parallel to each other between each main body, the main body of wherein said first projection is for being crisscross arranged, and each first projection has a plurality of breach and is formed at wherein, described first projection also has a plurality of first branched portions and a plurality of second branched portion that is extended by main body, described first branched portion is formed at the position in the face of first edge of this pixel electrode, and described second branched portion is formed at the position in the face of second edge of this pixel electrode, near the pixel electrode first marginal position place per two in the face of between the first adjacent branched portion and define a groove between first and second substrates;
A plurality of second projections are arranged on this second substrate, and described second projection is formed on the position near described groove.
2. LCD as claimed in claim 1 is characterized in that, this second substrate is provided with a light and covers array, and the breach of this first projection all is formed in the zone that this light covers array.
3. LCD as claimed in claim 2 is characterized in that,
This light covers array and has a plurality of files along this data line extension, and has a plurality of lines to extend along this gate line,
Wherein said first projection does not all extend across the line that this light covers array.
4. LCD as claimed in claim 2 is characterized in that,
This light covers array to have a plurality of files and extends and have a plurality of lines to extend along this gate line along this data line,
Wherein said first projection does not all extend across the file that this light covers array.
5. LCD as claimed in claim 2 is characterized in that,
This light covers array to have a plurality of files and extends and have a plurality of lines to extend along this gate line along this data line,
Wherein said first projection does not all extend across file and the line that this light covers array.
6. colored optical filtering substrates, be used for forming a LCD with a thin film transistor base plate, this thin film transistor base plate is first substrate, colored optical filtering substrates is second substrate, this second substrate and the first substrate upper and lower settings, this thin film transistor base plate have the slit of a plurality of pixel electrodes and an arrayed to be located on this pixel electrode, and each pixel electrode has first edge and second edge, it is characterized in that this colored optical filtering substrates comprises:
First projection of an arrayed, each first projection has a main body that is " it " word pattern, and parallel to each other between each main body, and the main body of the slit of this thin film transistor base plate and this first projection is for being crisscross arranged,
Wherein each first projection has a plurality of breach and is formed at wherein;
Described first projection also has a plurality of first branched portions and a plurality of second branched portion that is extended by main body, described first branched portion is formed at the position in the face of first edge of this pixel electrode, and described second branched portion be formed in the face of the position at second edge of this pixel electrode near the pixel electrode first marginal position place per two in the face of between the first adjacent branched portion and define a groove between first substrate and second substrate; And
A plurality of second projections are arranged on this second substrate, and described second projection is formed on the position near described groove.
7. colored optical filtering substrates as claimed in claim 6, it comprises a light in addition and covers array, it is characterized in that, and the breach of described first projection all is formed in the zone that this light covers array.
8. colored optical filtering substrates as claimed in claim 7 is characterized in that,
This thin film transistor base plate has a plurality of parallel gate polar curves, and a plurality of panel data line is perpendicular to this gate line; And
When this colored optical filtering substrates was located on this thin film transistor base plate, this light covered array and has a plurality of files along this data line extension, and has a plurality of lines to extend along this gate line,
Wherein said first projection does not all extend across the line that this light covers array.
9. colored optical filtering substrates as claimed in claim 7 is characterized in that,
This thin film transistor base plate has a plurality of parallel gate polar curves and a plurality of panel data line perpendicular to this gate line; And
When this colored optical filtering substrates was located on this thin film transistor base plate, this light covered array and has a plurality of files along this data line extension, and has a plurality of lines to extend along this gate line,
Wherein said first projection does not all extend across the file that this light covers array.
10. colored optical filtering substrates as claimed in claim 7 is characterized in that,
This thin film transistor base plate has a plurality of parallel gate polar curves and a plurality of panel data line perpendicular to this gate line; And
When this colored optical filtering substrates was located on this thin film transistor base plate, this light covered array and has a plurality of files along this data line extension, and has a plurality of lines to extend along this gate line,
Wherein said first projection does not all extend across file and the line that this light covers array.
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| CN 02154021 CN1506722B (en) | 2002-12-05 | 2002-12-05 | Liquid crystal display |
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| CN1506722B true CN1506722B (en) | 2010-05-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1301436C (en) * | 2004-08-02 | 2007-02-21 | 友达光电股份有限公司 | Multiple zone vertical arrangement type liquid crystal display and its pixel electrode forming method |
| KR101133757B1 (en) | 2004-11-25 | 2012-04-09 | 삼성전자주식회사 | Liquid crystal display |
| CN100385320C (en) * | 2005-01-31 | 2008-04-30 | 友达光电股份有限公司 | Multi-area vertical calibrating liquid crystal display device |
| CN100437302C (en) * | 2006-11-01 | 2008-11-26 | 友达光电股份有限公司 | Pixel structure of display device and its producing method |
| JP5378511B2 (en) * | 2009-05-26 | 2013-12-25 | シャープ株式会社 | Liquid crystal display |
| CN101813861B (en) * | 2010-05-06 | 2012-01-25 | 友达光电股份有限公司 | Liquid crystal display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001083522A (en) * | 1999-09-16 | 2001-03-30 | Fujitsu Ltd | Liquid crystal display device and thin film transistor substrate |
| WO2001033288A1 (en) * | 1999-11-05 | 2001-05-10 | Koninklijke Philips Electronics N.V. | Liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001083522A (en) * | 1999-09-16 | 2001-03-30 | Fujitsu Ltd | Liquid crystal display device and thin film transistor substrate |
| WO2001033288A1 (en) * | 1999-11-05 | 2001-05-10 | Koninklijke Philips Electronics N.V. | Liquid crystal display device |
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