CN101256330A

CN101256330A - LCD device with multi-domain vertical orientation mode

Info

Publication number: CN101256330A
Application number: CNA2008100349623A
Authority: CN
Inventors: 孙荣阁; 徐亮; 刘选斌
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2008-03-21
Filing date: 2008-03-21
Publication date: 2008-09-03

Abstract

The invention relates to a liquid crystal display device of polydomain vertical orientation mode, comprising a first substrate and second substrate oppositely disposed; a liquid crystal layer between the first substrate and second substrate; a pixel electrode formed on the first substrate; a common electrode formed on the second substrate; a groove or protrusion graved on the pixel electrode or common electrode; a first protrusion and second protrusion alternatively oppositing to the said groove or protrusion on the pixel electrode or common electrode; the first protrusion having first height and the protrusion having second height and the first height is higher than the second height and the first protrusion being alternatively arranged with the second protrusion. The liquid crystal display device can realize 8-domain display without increasing the drive cost and reducing the production good ratio, in order to improve the aberration.

Description

The liquid crystal indicator of multi-domain vertical orientation mode

Technical field

The present invention relates to a kind of liquid crystal indicator, relate 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 second 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 Polarizer.

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 has generally adopted orientation projection (protrusion) 115 or transparency electrode groove (ITO slit) 116 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, has the direction interdependence in the performance of color, as shown in Figure 3 and Figure 4, be that the color that showed of positive view directions and angle of squint direction is inconsistent, thereby influence angular field of view and image quality.The reason that this phenomenon takes place is that liquid crystal molecule is an anisotropic substance, and under different observation visual angles, liquid crystal layer causes the appearance of aberration to the selection transmitance difference of different wave length.

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 electric charge is easily assembled at its coupling capacitance two ends, causes the generation of 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.

Summary of the invention

Technical matters to be solved by this invention 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 present invention solves 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, comprises first substrate and second substrate that are oppositely arranged; 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; Wherein be formed with on pixel electrode or the common electrode and described groove or staggered relative first projection and second projection of projection; Described first projection has first height, and described second projection has second height, and first highly is higher than second height, and described first projection and second projection are spaced.

In the above-mentioned liquid crystal indicator, described first projection and second projection can be bar row shape and be spaced.

The liquid crystal indicator of multi-domain vertical orientation mode of the present invention, by on first substrate or second substrate, making the projection of differing heights, utilize the orientation projection control ability different of differing heights to liquid crystal molecule, make liquid crystal molecule represent different states, thereby realize that 8 farmlands show, reach the purpose of improving aberration.Compare with the capacitive coupling of Samsung and the Super-PVA pattern of double T FT, the present invention is easy to realize, and do not increase manufacturing process, need not increase the number of gate line or data line, therefore do not reduce fine ratio of product, do not increase the driving cost yet, on the basis that does not influence other optical characteristics, improved aberration.

Description of drawings

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:

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

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

Fig. 3 is the sub-pixel synoptic diagram of existing VA mode LCD;

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

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

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

Fig. 7 is the sub-pixel synoptic diagram of another embodiment of the present invention;

Fig. 8 is the diagrammatic cross-section of Fig. 7 along the C-C direction;

Fig. 9 is the diagrammatic cross-section of Fig. 7 along the D-D direction.

Among the figure:

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

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

115: projection 115a: the first projection 115b: second projection 116: groove

Embodiment

Fig. 5 is the sub-pixel synoptic diagram of the embodiment of the invention; Fig. 6 is the diagrammatic cross-section of Fig. 5 along the B-B direction.

Please refer to Fig. 5, Fig. 6, the liquid crystal indicator of multi-domain vertical orientation mode of the present invention 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 subpixel on first substrate 111, in the viewing area of each sub-pixel, be formed with pixel electrode 113a, pixel electrode 113a is made by transparent conductive material, as ITO (tin indium oxide), IZO (indium zinc oxide) etc., by etching, on the ad-hoc location of pixel electrode 113a, be formed with groove 116.

Be formed with red on second substrate 112, green, cyan coloring layer, on chromatograph, be coated with transparent electrode layer, be

common electrode

113b, 113a is the same with pixel electrode, can be by ITO, transparent conductive materials such as IZO are made, simultaneously, on common electrode 113b, be manufactured with and the groove 116 staggered relative first projection 115a and the second projection 115b, the first projection 115a and the second projection 115b can be made by resin material, and the first projection 115a have first the height, the second projection 115b have second the height, this first highly be higher than second the height, the first projection 115a and the second projection 115b can be bar row shape and be spaced, as shown in Figure 5 and Figure 6; Also can be as Fig. 7, Fig. 8, the mode that is spaced shown in Figure 9.

In the foregoing description, the described first projection 115a, the second projection 115b also can be produced on the pixel electrode 113a of first substrate 111, on the common electrode 113b of second substrate 112, etch groove 116, perhaps above-mentioned groove 116 usefulness projections 115 substitute, as long as the first projection 115a in the same subpixel area has different height with the second projection 115b, can make liquid crystal molecule 114a be formed with different angles of inclination, thereby reach the purpose of improving aberration.

The embodiment of the invention is because the first projection 115a is different to the control ability of liquid crystal molecule 114a with the second projection 115b, therefore applying under the voltage condition, the first projection 115a is different with the state that liquid crystal molecule represented around the second projection 115b, equal original demonstration having become 8 farmlands, 4 farmlands, the optical delay that the liquid crystal molecule on different farmlands causes is different, final effect is the result of optical delay average effect, so have improvement aspect aberration.

Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when 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;

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;

It is characterized in that being formed with on described pixel electrode or the common electrode and groove or staggered relative first projection and second projection of projection; Described first projection has first height, and described second projection has second height, and described first highly is higher than described second height, and described first projection and second projection are spaced.

2, the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 is characterized in that described first projection and second projection are bar row shape and are spaced.