CN201289562Y

CN201289562Y - Liquid crystal display panel

Info

Publication number: CN201289562Y
Application number: CNU2008201554298U
Authority: CN
Inventors: 秦丹丹
Original assignee: SVA Group Co Ltd
Current assignee: Nanjing CEC Panda LCD Technology Co Ltd
Priority date: 2008-11-17
Filing date: 2008-11-17
Publication date: 2009-08-12
Anticipated expiration: 2018-11-17

Abstract

The utility model discloses an LCD (Liquid Crystal display) panel which comprises a colored film substrate and an array substrate, wherein, the colored film substrate comprises a first substrate; a black matrix and an alignment layer are formed on the first substrate; the array substrate comprises a second substrate; pixel electrodes in matrix distribution are formed on the second substrate; an alignment layer is formed on the pixel electrodes; a plurality of down-step areas and reverse-step areas are formed on the alignment layer on the pixel electrodes in the frictional processing direction; and the black matrix corresponding to the reverse-step areas has light-shading area larger than that of the black matrix corresponding to the down-step areas. The LCD panel provided by the utility model can solve the light leakage phenomenon on the steps of the alignment layer on the pixel electrodes.

Description

Display panels

Technical field

The utility model relates to a kind of display panels, relates in particular to a kind of display panels that can improve both alignment layers step place light leakage phenomena.

Background technology

Liquid crystal indicator generally comprise first substrate, second substrate and be filled in first substrate and second substrate between liquid crystal layer; Viewing area on second substrate comprises a plurality of subpixel area, each subpixel area is generally two gate line (gate line, claim sweep trace again) intersect defined rectangle or other shape area with two data lines (data line), 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 public electrode (except the IPS liquid crystal display pattern) on first substrate, on the electrode of upper and lower base plate, be formed with both alignment layers, make liquid crystal molecule not keep certain orientation under the powering state.Form electric field between the public electrode of the pixel electrode of second substrate and first substrate, the variation of electric field intensity can be modulated the orientation of liquid crystal molecule, thereby makes backlight realize the variation of transmitance, forms pattern displaying.First substrate also comprises black matrix (BM) with shaded effect and the look resistance layer with translucent effect.

The liquid crystal display pattern that is applied to computer monitor and small size TV aspect at present mainly is TN (TwistedNematic; Twisted nematic) pattern.Fig. 1 is for being the dot structure synoptic diagram of existing TN type liquid crystal display pattern.Adjacent two gate lines 123,124 and adjacent two data lines 121,122 intersect the zone 125 that limits and are pixel electrode, this pixel electrode 125 forms storage capacitors with public electrode 126 and shading line 127 thereof, be used for keeping pixel voltage, black matrix 111 is arranged on first substrate, is used for covering a plurality of thin film transistor (TFT)s 128 and many gate lines, data line and public electrodes.

Fig. 2 is the diagrammatic cross-section along 1A-1A ' line among Fig. 1.Display panels comprise first substrate 110, second substrate 120 that is oppositely arranged and be filled in first substrate 110 and second substrate 120 between liquid crystal layer 130, first substrate 110 is provided with black matrix 111, define a plurality of sub-pixel area, be used to stop light to enter in the non-pixel region, and cut apart the look resistance layer 112 that continues and make, to increase color contrast, be provided with R, G, B look resistance layer in the sub-pixel; The viewing area of second substrate 120 comprises a plurality of sub-pixel area, is provided with

shading line

127a, 127b and pixel electrode 125 in the sub-pixel.

Pixel electrode 125 with second substrate 120 on the public electrode 113 of first substrate 110 is provided with both

alignment layers

114 and 129, through after the friction treatment liquid crystal is carried out orientation, the section that forms because of the existence of data line, shading line etc. on the substrate is poor, thereby make to be formed with step on the both alignment layers, local different at the angle of inclination of step place liquid crystal with other.Please refer to Fig. 2, the both alignment layers 129 on pixel electrode 125 has a plurality of

step part

129a, 129b, and this step part has predetermined step difference, and the stage portion branch in the pixel region causes near the inconsistent orientation of these liquid crystal in zone.

If liquid crystal is in normal black pattern, then when not applying voltage, show black.Yet, when not applying gate voltage, because the inconsistent orientation of

stepped area

129a, 129b liquid crystal can produce light leak.

In addition, suppose frictional direction as shown in FIG., then the liquid crystal 129b of contrary stepped area will have the tilt angle bigger than the liquid crystal of suitable stepped area 129a, the contrary easier formation light leak of stepped area 129b.Chinese patent CN200710161754.5 proposes to implement friction treatment from link towards the direction of openend at the problem of IPS mode LCD stepped area light leak.

The utility model content

Technical problem to be solved in the utility model provides a kind of display panels, can improve the light leakage phenomena at the both alignment layers step place on the pixel electrode.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of display panels, comprising:

One color membrane substrates: comprise first substrate, be formed with black matrix and both alignment layers on described first substrate;

Array basal plate: comprise second substrate, be formed with the pixel electrode that is rectangular distribution on described second substrate, be formed with both alignment layers on the described pixel electrode, the both alignment layers on the described pixel electrode is formed with a plurality of along stepped area and contrary stepped area along the friction treatment direction;

Wherein, the described contrary pairing black matrix of stepped area has than described along the bigger shading area of the pairing black matrix of stepped area.

Above-mentioned display panels, wherein, the liquid crystal molecule of described contrary stepped area has bigger tilt angle than described liquid crystal molecule along stepped area.

The utility model contrast prior art has following beneficial effect: the display panels that the utility model provides, because contrary stepped area is used bigger black matrix shading area, can improve the light leakage phenomena at the both alignment layers step place on the pixel electrode.

Description of drawings

Fig. 1 is the dot structure synoptic diagram of existing TN type liquid crystal display pattern.

Fig. 2 is the diagrammatic cross-section along 1A-1A ' line among Fig. 1.

Fig. 3 is the structural representation of pixel of the present utility model.

Fig. 4 is the diagrammatic cross-section along 2A-2A ' line among Fig. 3.

Among the figure:

110 first substrates 111,111a, 111b deceives matrix 112 look resistance layers

113 public electrodes, 114 both alignment layers, 120 second substrates

121,122 data lines, 123,124 gate lines, 125 pixel electrodes

126 public electrodes 127,127a, 127b shading line 128 thin film transistor (TFT)s

129 both alignment layers 129a are along the contrary stepped area of stepped area 129b

130 liquid crystal layers

210 first substrates 211,211a, 211b deceives matrix 212 look resistance layers

213 public electrodes, 214 both alignment layers, 220 second substrates

221,222 data lines, 223,224 gate lines, 225 pixel electrodes

226 public electrodes 227,227a, 227b shading line 228 thin film transistor (TFT)s

229 both alignment layers 229a are along the contrary stepped area of stepped area 229b

230 liquid crystal layers

Embodiment

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 3 is the structural representation of pixel of the present utility model.

See also Fig. 3, display panels of the present utility model comprises and a plurality ofly intersects the zone that limits 225 by adjacent two gate lines 223,224 and adjacent two data lines 221,222 and be pixel electrode, this pixel electrode 225 forms storage capacitors with public electrode 226 and shading line 227 thereof, be used for keeping pixel voltage, black matrix 211 is arranged on first substrate, be used for shielding film transistor 228, gate line 223,224, data line 221,222, public electrode 226 and shading line 227.

Fig. 4 is the diagrammatic cross-section along 2A-2A ' line among Fig. 3.

See also Fig. 4, display panels of the present utility model comprise first substrate 210, second substrate 220 that is oppositely arranged and be filled in first substrate 210 and second substrate 220 between liquid crystal layer 230, first substrate 210 is provided with black matrix 211, define a plurality of sub-pixel area, be used to stop light to enter in the non-pixel region, and cut apart the look resistance layer 212 that continues and make, to increase color contrast, be provided with R, G, B look resistance layer in the sub-pixel; The viewing area of second substrate 220 comprises a plurality of sub-pixel area, is provided with

shading line

227a, 227b and pixel electrode 225 in the sub-pixel.

Be formed with both

alignment layers

214 and 229 on the public electrode 213 of first substrate 210 and on the pixel electrode 225 of second substrate 220, making liquid crystal molecule keep certain preorientation.Wherein, the section of being formed with is poor because of the existence of gate line, data line, shading line etc. on second substrate 220, thereby make and be formed with step on the both alignment layers 229, angle of inclination at step place liquid crystal is local different with other, when described both alignment layers 229 was implemented friction treatment, described stepped area had suitable stepped area 229a and contrary stepped area 229b along frictional direction.

The liquid crystal molecule that the liquid crystal molecule at contrary stepped area 229b place is compared along stepped area 229a has bigger tilt angle, thereby the easier light leak that causes in contrary stepped area 229b place.Wherein, there are

black matrix

211a and 211b to hide respectively to acting in accordance with stepped area 229a and contrary stepped area 229b zone on first substrate 210, in order to improve the light leakage phenomena at the contrary stepped area 229b place of picture, black matrix 211b compares black matrix 211a and has bigger area, specifically, described contrary stepped area 229b edge arrives with it corresponding black matrix 211a Edge Distance W2 greater than described along stepped area 229a edge to corresponding with it black matrix 211b Edge Distance W1.

The utility model owing to adopted more large-area black matrix 211b to hide to contrary stepped area 229b, therefore can prevent light leak compared to prior art better, improves contrast.

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, display panels comprises:

It is characterized in that the described contrary pairing black matrix of stepped area has than described along the bigger shading area of the pairing black matrix of stepped area.

2, display panels as claimed in claim 1 is characterized in that, the liquid crystal molecule of described contrary stepped area has bigger tilt angle than described liquid crystal molecule along stepped area.