CN201269962Y

CN201269962Y - LCD device in multi-domain vertically aligned mode

Info

Publication number: CN201269962Y
Application number: CNU2008201527572U
Authority: CN
Inventors: 刘金良; 孙荣阁
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2008-09-05
Filing date: 2008-09-05
Publication date: 2009-07-08
Anticipated expiration: 2018-09-05

Abstract

The utility model relates to a liquid crystal display device with multi-domain vertical alignment mode, which comprises a first base plate and a second base plate opposite to the first plate, and a liquid crystal layer filled between the first base plate and the second late. A pixel electrode is formed on the first base plate; a common electrode is formed on the second base plate; grooves or lugs are formed on the pixel electrode or the common electrode, and the pixel electrode is divided into a plurality of domains by the grooves or the lugs; wherein, a round alignment lug is formed on the pixel electrode or the common electrode in each domain, the round alignment lugs are arranged in spotted state and the round alignment lugs in two neighboring domains have different sizes. The liquid crystal display device liquid crystal adopts the control capability of the round alignment lugs with different sizes to the liquid crystal polymers to cause the liquid crystal polymers to form different slant angles by manufacturing the round alignment lugs with different sizes in each domain, thus improving the chromatic aberration.

Description

The liquid crystal indicator of multi-domain vertical orientation mode

Technical field

The utility model relates to a kind of liquid crystal indicator, relates in particular to the liquid crystal indicator of multi-domain vertical orientation mode.

Background technology

Liquid crystal indicator (LCD) has occupied critical role with low, the lightening advantage of its energy consumption in flat-panel display device.Liquid crystal indicator usually by backlight module, first substrate that is oppositely arranged and second substrate and be filled in first substrate and second substrate between liquid crystal layer constitute, liquid crystal layer is made up of liquid crystal molecule, viewing area on first substrate comprises a plurality of pixel regions, be provided with thin film transistor (TFT) (TFT) and pixel electrode in it, thin film transistor (TFT) serves as on-off element; Be formed with alignment film on the inboard of first substrate and second substrate, liquid crystal molecule is carried out orientation; Arranged outside has the orthogonal Polarizer of printing opacity direction.

For large-sized LCD, the wide viewing angle technology has also obtained popularizing on using.In the wide viewing angle technology, vertical orientated demonstration (VA) pattern has high penetration, high-contrast and response speed fast, thereby uses comparatively extensive.

To the LCD of VA pattern, the liquid crystal that is adopted is a negative type liquid crystal.In order to trigger liquid crystal molecule orientation deflection takes place after voltage applies, the LCD of VA pattern generally adopts transparency electrode groove (ITO slit) 116 or orientation projection (protrusion) 115 structures on first substrate 111 and second substrate 112.The effect of VA type alignment film presents perpendicular to the direction on

substrate

111 and 112 surfaces liquid crystal molecule 114a and arranges under not alive situation, the light that backlight penetrates is through becoming linearly polarized light behind the Polarizer down, during by liquid crystal layer 114, owing to there is not birefringence effect, the polarization direction does not change, and can't pass Polarizer, show black attitude, as shown in Figure 1.And add after the voltage when the both sides of liquid crystal layer 114, the orientation of liquid crystal molecule 114a deflects, voltage by control liquid crystal layer 114 both sides just can be controlled the orientation deflection angle of liquid crystal molecule 114a, thereby realizes the modulation to the power of transmitted light, as shown in Figure 2.

To traditional VA mode LCD, because the orientation of liquid crystal molecule has directivity, make the color performance of different angles also have the direction interdependence, influence angular field of view and image quality.The reason that this phenomenon takes place can utilize Fig. 3 and Fig. 4 to make an explanation, because liquid crystal molecule is an anisotropic substance, under different observation visual angles, liquid crystal layer is to the transmitance difference of the light of different colours wavelength, thereby can cause the appearance of aberration.

For improving the aberration that the VA pattern shows, 2005, Samsung proposed the S-PVA pattern of capacitive coupling and double T FT.Capacity coupled method is that a sub-pixel is divided into two parts, utilizes capacitive coupling, makes two parts produce different driving voltages, shows thereby form 8 farmlands.Double T FT S-PVA pattern is the number that doubles grid (Gate) line or data (Data) line, adopts two TFT, is divided into two zones of different area respectively in the driven element pixel, realizes that 8 farmlands show.It is comprehensive that the effect that 8 farmlands show shows as the effect in two zones, thereby the aberration of angle of squint direction is improved.Capacity coupled method can be improved aberration preferably, but its coupling capacitance can produce residual charge, causes image retention, influences display effect.And double T FT S-PVA pattern need be made two TFT devices, and doubles the number of Gate or Data line, has reduced fine ratio of product to a certain extent, has also increased the driving cost.

The utility model content

Technical problem to be solved in the utility model provides a kind of liquid crystal indicator that can improve the multi-domain vertical orientation mode of aberration, and is easy to make, and does not increase the driving cost, does not reduce fine ratio of product.

The utility model is to solve the problems of the technologies described above the liquid crystal indicator that the technical scheme that adopts provides a kind of multi-domain vertical orientation mode, comprising:

First substrate that is oppositely arranged and second substrate;

One liquid crystal layer is filled between first substrate and second substrate;

Be formed with pixel electrode on described first substrate;

Be formed with common electrode on described second substrate;

Be formed with groove or projection on described pixel electrode or the common electrode, described pixel electrode is divided into a plurality of zones by described groove or projection;

Wherein, be formed with a circular orientation projection on pixel electrode in each zone or the common electrode, described circular orientation projection is point-like and is spaced, and the circular orientation projection in the adjacent area varies in size.

In the above-mentioned liquid crystal indicator, described circular orientation projection is positioned in the middle of the described zone.

The liquid crystal indicator of multi-domain vertical orientation mode of the present utility model, by in each zone, making the circular orientation projection of different sizes, utilize the circular orientation projection control ability different of different sizes to liquid crystal molecule, make liquid crystal molecule be formed with different angles of inclination, thereby reach the purpose of improving aberration.The utility model is easy to realize, does not increase manufacturing process, does not also increase the driving cost, has improved aberration on the basis that does not influence other optical characteristics.

Description of drawings

Fig. 1 is existing LCD device in vertical orientation mode not under the powering state, liquid crystal molecular orientation synoptic diagram;

Fig. 2 is for having under the LCD device in vertical orientation mode powering state liquid crystal molecular orientation synoptic diagram now;

Fig. 3 is the sub-pixel synoptic diagram of existing LCD device in vertical orientation mode;

Fig. 4 is the diagrammatic cross-section of Fig. 3 along A-A direction;

Fig. 5 is the sub-pixel synoptic diagram of the utility model embodiment;

Fig. 6 is the diagrammatic cross-section of Fig. 5 along C-C direction;

Fig. 7 is an orientation projection distribution schematic diagram in the utility model sub-pixel;

Among the figure:

112: the second substrate 113a of 111: the first substrates: pixel electrode

113b: common electrode 113: transparency electrode 114a: liquid crystal molecule

114: liquid crystal layer 115: projection 115a: the first orientation projection

115b: the second orientation projection 116: groove

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.

Fig. 5 is the sub-pixel synoptic diagram of the utility model embodiment; Fig. 6 is the diagrammatic cross-section of Fig. 5 along C-C direction.

Please refer to Fig. 5, Fig. 6, the liquid crystal indicator of multi-domain vertical orientation mode of the present utility model comprises first substrate 111 and second substrate 112 that is oppositely arranged, first substrate 111 is that array base palte, second substrate 112 are color membrane substrates, first substrate 111 and second substrate 112 are transparent insulation substrate, as glass substrate, plastic substrate; Be filled in the liquid crystal layer 114 between first substrate 111 and second substrate 112, liquid crystal layer 114 is made up of liquid crystal molecule 114a, liquid crystal molecule 114a is a negative liquid crystal, promptly the specific inductive capacity along the molecular long axis direction is less than along the specific inductive capacity of molecule short-axis direction, when not having electric potential difference to exist between first substrate 111 and second substrate 112, liquid crystal molecule 114a arranges perpendicular to the surface of first substrate 111 and second substrate 112.

Be formed with a plurality of sub-pixels on first substrate 111, in the viewing area of each sub-pixel, be formed with pixel electrode 113a, pixel electrode 113a by transparent conductive material by being etched into, as ITO (tin indium oxide), IZO (indium zinc oxide) etc.Be formed with the red, green, blue chromatograph on second substrate 112, on chromatograph, be coated with transparent electrode layer, i.e.

common electrode

113b, 113a is the same with pixel electrode, can be made by transparent conductive materials such as ITO, IZO.Simultaneously, on transparency electrode 113 (pixel electrode 113a and/or common electrode 113b), be manufactured with projection 115 and/or groove 116, transparency electrode 113 is divided into a plurality of zones.As shown in Figure 5, transparency electrode 113 is divided into two zones by groove 116, each regional intermediate fabrication has the first orientation projection 115a and the second orientation projection 115b of cavitation spot distribution, the first orientation projection 115a and the second orientation projection 115b can be made by resin material, and the first orientation projection 115a has first size, the second orientation projection 115b has second size, this first size is less than second size, the first orientation projection 115a and the second orientation projection 115b roughly are positioned at the centre of region, are the cave spot distribution.

Continuation is with reference to Fig. 6, because the circular orientation projection control abilities different to liquid crystal molecule of different sizes, liquid crystal molecule has different angles of inclination in the first orientation projection 115a and the second orientation projection 115b region, thereby reaches the purpose of improving aberration.

Fig. 7 is an orientation projection distribution schematic diagram in the utility model sub-pixel.

Please refer to Fig. 7, projection 115 and/or groove 116 in pixel electrode 113a and/or common electrode 113b making can be divided into sub-pixel two or more zones, sub-pixel among Fig. 7 (a) is divided into 2 zones, sub-pixel among Fig. 7 (b) and 7 (c) is divided into 8 zones, and the sub-pixel among Fig. 7 (d) is divided into 12 zones.Be manufactured with the orientation projection in each zone, the size of orientation projection can be divided into two or more, and the orientation projection in the adjacent area has different sizes.The orientation projection roughly is positioned at the centre of region, described circular orientation projection is point-like and is spaced, each zone has a circular orientation projection to get final product, as long as the circular orientation projection in the adjacent area of same sub-pixel varies in size, can make liquid crystal molecule 114a be formed with different angles of inclination, thereby reach the purpose of improving aberration.Because each zone has only an orientation projection, and double Gate or the Data line is compared, can influence aperture opening ratio hardly.The roughly rounded shape of orientation projection, circular orientation projection and liquid crystal molecule 114a have maximum contact area, are more conducive to make liquid crystal molecule 114a to be formed with different angles of inclination.

The utility model embodiment is owing to be manufactured with circular orientation projection in each zone, circular orientation projection in the adjacent area has the size of different sizes, utilize the circular orientation projection control ability different of different sizes to liquid crystal molecule, make liquid crystal molecule be formed with different angles of inclination, thereby reach the purpose of improving aberration.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.

Claims

1, a kind of liquid crystal indicator of multi-domain vertical orientation mode comprises

First substrate that is oppositely arranged and second substrate;

Be formed with pixel electrode on described first substrate;

Be formed with common electrode on described second substrate;

It is characterized in that be formed with a circular orientation projection on pixel electrode in each zone or the common electrode, described circular orientation projection is point-like and is spaced, the circular orientation projection in the adjacent area varies in size.

2, the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 is characterized in that, described circular orientation projection is positioned in the middle of the described zone.