CN201159813Y - Liquid crystal display board and image element structure thereof - Google Patents
Liquid crystal display board and image element structure thereof Download PDFInfo
- Publication number
- CN201159813Y CN201159813Y CNU2008200558215U CN200820055821U CN201159813Y CN 201159813 Y CN201159813 Y CN 201159813Y CN U2008200558215 U CNU2008200558215 U CN U2008200558215U CN 200820055821 U CN200820055821 U CN 200820055821U CN 201159813 Y CN201159813 Y CN 201159813Y
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- subpixel area
- dielectric layer
- coupling capacitance
- pixel
- pixel electrode
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Abstract
The utility model relates to a pixel structure which is suitable for the LCD display device with multidomain vertical alignment mode. The pixel structure includes a scanning line, a data line, a film transistor and pixel electrodes. The scanning line and the data line define a pixel area which includes a first pixel sub-area and a second pixel sub-area. The transistor is arranged on a base plate and is electrically connected with the scanning line and the data line. The pixel electrodes are arranged in the pixel area and are electrically connected with the source of the film transistor. Wherein, the height of part electrodes in the first pixel area is lower that that of part electrodes in the second pixel area; and a first transparent coupling capacitance medium layer is covered at the pixel electrodes in at least the first pixel sub-area. The utility model also discloses the LCD display panel provided with the pixel structure. The proposal can reduce the color deviation problem in the traditional LCD display while not reduce the aperture ratio of the pixel.
Description
Technical field
The utility model relates to a kind of thin-film transistor LCD device (TFT-LCD).Specially refer to a kind of display panel and dot structure thereof of multi-domain vertical orientation mode liquid crystal indicator.
Background technology
At present, have that high image quality, space utilization efficient are good, the LCD of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.In order to allow the user that better display quality is arranged, LCD all develops towards characteristics such as height contrast (high contrast ratio), the counter-rotating of no GTG (no gray scaleinversion), colour cast little (little color shift), brightness height (high luminance), high color saturation, rapid reaction and wide viewing angles at present.
Liquid crystal in the liquid crystal display itself is not luminous.Thereby liquid crystal display is to reverse the light transmission rate of control liquid crystal cells by the electric field controls liquid crystal molecule, thereby reaches the purpose of demonstration.Generally, among the TFT-LCD liquid crystal is enclosed between TFT substrate and the color membrane substrates.In vertical orientated TFT-LCD, use negative liquid crystal to constitute liquid crystal cells.With reference to United States Patent (USP) 6661488B1, shown in Figure 1A, the liquid crystal pixel upper and lower base plate is not applying under the voltage condition, and liquid crystal molecule 106 is arranged perpendicular to glass substrate 101 and 104.Electric signal can be by common transparent electrode above the glass substrate 101 and 104 102 and pixel electrode 103 apply respectively.Applying under the voltage condition, liquid crystal molecule 106 trends towards arranging perpendicular to direction of an electric field, thereby departs from the direction perpendicular to glass substrate 101,104.Concrete deflection angle is relevant with institute's bias voltage size that applies, shown in Figure 1B.So, change the light transmission characteristic of liquid crystal pixel, realize the demonstration of image by applying the modulation of voltage signal realization to liquid crystal molecule.
In the time of the liquid crystal molecules tilt certain angle, the observer will observe different display effects from different perspectives, the visual angle problem of Here it is liquid crystal indicator.For solving the visual angle problem, multiple technologies are developed.Wherein, by design the different subregion in angle of inclination (farmland) in pixel, the display characteristic of pixel is wherein each the farmland effect of integral mean spatially in the vertical orientated liquid crystal.Like this, the difference of seeing when observing liquid crystal display device from different perspectives reduces, and the visual angle is improved.Shown in Fig. 1 C, 108 is the signal line of display panels, the 109th, the source signal line, the 110th, public electrode, one the four vertical orientated liquid crystal pixel in farmland comprises pixel electrode 103 and active component (as TFT) 112, pixel electrode 103 has a plurality of slits 107, and pixel electrode 103 connects active component 112.Can influence Electric Field Distribution between pixel electrode 103 and the common transparent electrode 102 at the projection on the glass substrate 101 105 and slit 107, and then can make that liquid crystal molecule is multi-direction arrangement in the liquid crystal layer, the liquid crystal tilt conditions in the pixel 100 are divided into four farmland A, B, C, D.
Because there is tangible colour cast in vertical orientated liquid crystal display, be that the front is seen with the side and seen that difference is bigger, for further improving the visual angle, reduce the phenomenon of colour cast, proposed at present the transparency electrode that connects with TFT in the liquid crystal pixel further is divided into different zones, applied different voltage, made liquid crystal molecule 200 inclined degrees different in zones of different, be in 201 and 202 two kind of heeling condition respectively, as shown in Figure 2.So just increase liquid crystal display farmland number, realize that multidomain shows, thereby further improve viewing angle characteristic.Prior art has the capacitive coupling of employing to realize this multidomain technology, but the capacitive coupling layer that present capacitive coupling technology normally forms when forming first conducting metal, therefore the capacitive coupling layer is lighttight metal, this causes the part of pixel region light-permeable to reduce, thereby the reduction aperture ratio of pixels, this causes the rising of manufacturing cost.
The utility model content
Technical problem to be solved in the utility model provides a kind of display panel and dot structure thereof that can reduce the colour cast problem of traditional vertical orientated liquid crystal display and not influence the polydomain vertical orientation LCD device of aperture opening ratio.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of dot structure, is applicable to the multi-domain vertical orientation mode liquid crystal indicator, and this dot structure comprises sweep trace, data line, thin film transistor (TFT) and pixel electrode.Sweep trace and data line are disposed on the substrate, and to define a pixel region, this pixel region comprises first subpixel area and second subpixel area.Thin film transistor (TFT) is disposed on the substrate and is electrically connected to sweep trace and data line.Pixel electrode is disposed in the pixel region, and be electrically connected to the source electrode of thin film transistor (TFT), wherein the height of the partial pixel electrode in first subpixel area is lower than the height of the partial pixel electrode in second subpixel area, and covers the first coupling capacitance dielectric layer of layer of transparent at least on the pixel electrode of first subpixel area.
In dot structure of the present utility model, pixel electrode is provided with a plurality of slits.
In dot structure of the present utility model, the first coupling capacitance dielectric layer also covers second subpixel area, and first subpixel area is identical with the height of second subpixel area.
At dot structure of the present utility model, cover the second coupling capacitance dielectric layer of layer of transparent on the pixel electrode of second subpixel area, and the thickness of the second coupling capacitance dielectric layer is less than the thickness of the first coupling capacitance dielectric layer, and wherein the first coupling capacitance dielectric layer is different with the specific inductive capacity of the second coupling capacitance dielectric layer.
The utility model provides a kind of display panels, is applicable to the multi-domain vertical orientation mode liquid crystal indicator, and this display panels comprises a thin-film transistor array base-plate, and it has a plurality of above-mentioned dot structures; One color membrane substrates is oppositely arranged with described thin-film transistor array base-plate; And a liquid crystal layer, be disposed between described thin-film transistor array base-plate and the described color membrane substrates.
The utility model makes it compared with prior art owing to adopt above technical scheme, not only can reduce the colour cast problem of conventional liquid crystal, because formed coupling capacitance dielectric layer is transparent, therefore can not reduce aperture ratio of pixels simultaneously.
Description of drawings
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, wherein:
Figure 1A represents that existing a kind of polydomain vertical orientation LCD device is not applying the situation of the arranging synoptic diagram of liquid crystal molecule under the voltage condition.
Figure 1B represents that liquid crystal indicator shown in Figure 1A is applying the situation of the arranging synoptic diagram of liquid crystal molecule under the situation of certain voltage.
Fig. 1 C represents the surface plate figure synoptic diagram of existing a kind of polydomain vertical orientation LCD device.
Fig. 2 represents that pixel is carried out area dividing to be increased to by four farmlands in the prior art on eight farmlands, and the subregion liquid crystal molecules tilt state that pixel further is divided into has the synoptic diagram of JND.
Fig. 3 is the dot structure of the utility model first embodiment.
Fig. 4 A～Fig. 4 F, Fig. 5 A～Fig. 5 F is the dot structure manufacturing flow chart of the utility model first embodiment, and wherein Fig. 4 A～Fig. 4 F represents that along the sectional view of C-C ' direction among Fig. 3, Fig. 5 A～Fig. 5 F represents along the sectional view of D-D ' direction among Fig. 3.
Fig. 6 is the equivalent circuit diagram of the dot structure of the utility model first embodiment.
Fig. 7 is the manufacturing flow chart of the dot structure of the utility model second embodiment.
Fig. 8 is the manufacturing flow chart of the dot structure of the utility model the 3rd embodiment.
Fig. 9 is the equivalent circuit diagram of the dot structure of the utility model second and the 3rd embodiment.
Embodiment
Fig. 3 illustrates a kind of dot structure that is applicable to the multi-domain vertical orientation mode liquid crystal indicator of the present utility model, comprising the sweep trace 310, data line 320, TFT 340, pixel electrode 350 and the coupling capacitance dielectric layer 360 that are disposed on the thin-film transistor array base-plate (figure does not show).Wherein two adjacent sweep traces 310 and two adjacent data lines 320 define pixel regions.This pixel region is further divided into the first subpixel area A and the second subpixel area B.
Have the slit pattern that many slits 351 are formed on the pixel electrode 350, and pixel electrode 350 passes through the source electrode that contact hole 341 connects TFT 340, the grid connection sweep trace 310 of TFT 340, the drain electrode connection data line 320 of TFT 340.
Above-mentioned dot structure is to be configured on the thin-film transistor array base-plate, also disposes public electrode wire 311 on this substrate, and color film glass substrate on the other side does not dispose a plurality of protruding 370 on (figure shows).The filling liquid crystal molecule is to form liquid crystal layer (figure does not show) between thin-film transistor array base-plate and the color film glass substrate.Thin-film transistor array base-plate, color film glass substrate and liquid crystal layer therebetween are formed display panels of the present utility model.
By the dot structure manufacturing process of reference Fig. 4 A～Fig. 4 F and Fig. 5 A～Fig. 5 F, when the clearer understanding the utility model of energy.Wherein Fig. 4 A～Fig. 4 F represents that along the sectional view of C-C ' direction among Fig. 3, Fig. 5 A～Fig. 5 F represents along the sectional view of D-D ' direction among Fig. 3.
At first, please refer to shown in Fig. 4 A and Fig. 5 A, at first deposition first conductive layer on transparency carrier 300 adopts the first road mask process that first conductive layer is carried out patterning, forms gate electrode 312, sweep trace 310 and common electrode line 311.
Then, shown in Fig. 4 B and Fig. 5 B, deposition gate insulation layer 315 is peninsula body layer 318 and ohmic contact layer 319 then on first patterning conducting layer.Afterwards, adopt the second road mask process that peninsula body layer 318 and ohmic contact layer 319 are carried out the island and carve, form body island, the peninsula 316.
Afterwards, shown in Fig. 4 C and Fig. 5 C, sputter second conductive layer on semiconductor island 316 adopts the 3rd road mask process to form data line 320 then, and the source electrode 321 of thin film transistor (TFT) and drain electrode 322.
Follow again, shown in Fig. 4 D and Fig. 5 D, deposition passivation insulation 325, cover film transistor area, data line zone and pixel region carry out the hole then and carve, and form contact hole 341, simultaneously the insulation course in first subpixel area (with reference to Fig. 3) are carved.
Then with reference to shown in Fig. 4 E and Fig. 5 E, the sputter transparency conducting layer, in pixel region, form patterned pixel electrode 350, and the slit in the pixel electrode 351, the height that wherein forms the pixel electrode of the first subpixel area A can be lower than the height of the pixel electrode among the second subpixel area B, form step difference, and first, second subpixel area A and B electric connection.
At last, shown in Fig. 4 F and Fig. 5 F, adopt the first transparent coupling capacitance dielectric layer 360 optionally the low first subpixel area A of height smooth turn to the height of the second subpixel area B roughly the same.
The equivalent electrical circuit of the dot structure of the utility model first embodiment as shown in Figure 6, the first subpixel area A forms coupling capacitance Ccp by the planarized dielectric layer, the voltage Va that therefore acts on pixel region A is different with the voltage Vb of pixel region B, wherein:
CLCA is the liquid crystal capacitance of pixel region A.
Therefore, the foregoing description of the present utility model has different voltage by making different pixels zone A, B, makes liquid crystal molecules tilt degree varies sample, and reduces the colour cast effect but do not influence aperture opening ratio.
Fig. 7 is the manufacturing flow chart of the dot structure of the utility model second embodiment.Wherein other steps and above-mentioned first embodiment are similar, and difference is whole pixel region has been carried out planarization, and promptly the first coupling capacitance dielectric layer 360 also covers the second subpixel area B, and the height of subpixel area A, B is still roughly the same.Obviously, the thickness of the coupling capacitance dielectric layer among the second subpixel area B is less.
Fig. 8 is the manufacturing flow chart of the dot structure of the utility model the 3rd embodiment.Wherein other steps and above-mentioned first embodiment are similar, difference is that the second subpixel area B adopts the second different coupling capacitance dielectric layer 361 of specific inductive capacity to carry out planarization, but the thickness of the coupling capacitance dielectric layer among the second subpixel area B is less, makes the height of subpixel area A, B still roughly the same.
Above-mentioned second and the equivalent electrical circuit of the 3rd embodiment as shown in Figure 9.The first subpixel area A forms coupling capacitance Ccp1 by the planarized dielectric layer, and the second subpixel area B forms the different coupling capacitance Ccp2 of capacitance by the planarized dielectric layer, and the voltage Va that therefore acts on pixel region A is different with the voltage Vb of pixel region B.
In sum, dot structure of the present utility model, display panels can improve the vertical orientated colour cast problem of tradition, because formed coupling capacitance dielectric layer is transparent, therefore can not reduce aperture ratio of pixels simultaneously.
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 (8)
1. a dot structure is applicable to the multi-domain vertical orientation mode liquid crystal indicator, it is characterized in that, described dot structure comprises:
Sweep trace and data line are disposed on the substrate, and to define a pixel region, described pixel region comprises first subpixel area and second subpixel area;
One thin film transistor (TFT) is disposed on the described substrate, and is electrically connected to described sweep trace and described data line; And
One pixel electrode, be disposed in the described pixel region, and be electrically connected to the source electrode of described thin film transistor (TFT), wherein the height of the partial pixel electrode in described first subpixel area is lower than the height of the partial pixel electrode in described second subpixel area, and covers the first coupling capacitance dielectric layer of layer of transparent at least on the pixel electrode of described first subpixel area.
2. dot structure as claimed in claim 1 is characterized in that described pixel electrode is provided with a plurality of slits.
3. dot structure as claimed in claim 1 is characterized in that, the described first coupling capacitance dielectric layer also covers described second subpixel area, and described first subpixel area is identical with the height of described second subpixel area.
4. dot structure as claimed in claim 1, it is characterized in that, cover the second coupling capacitance dielectric layer of layer of transparent on the pixel electrode of described second subpixel area, and the thickness of the described second coupling capacitance dielectric layer is less than the thickness of the described first coupling capacitance dielectric layer, and the wherein said first coupling capacitance dielectric layer is different with the specific inductive capacity of the described second coupling capacitance dielectric layer.
5. a display panels is applicable to the multi-domain vertical orientation mode liquid crystal indicator, it is characterized in that, described display panels comprises:
One thin-film transistor array base-plate has a plurality of dot structures, and each dot structure comprises:
Sweep trace and data line are disposed on the substrate, and to define a pixel region, described pixel region comprises first subpixel area and second subpixel area;
One thin film transistor (TFT) is disposed on the described substrate, and is electrically connected to described sweep trace and described data line; And
One pixel electrode, be disposed in the described pixel region, and be electrically connected to the source electrode of described thin film transistor (TFT), wherein the height of the partial pixel electrode in described first subpixel area is lower than the height of the partial pixel electrode in described second subpixel area, and covers the first coupling capacitance dielectric layer of layer of transparent at least on the pixel electrode of described first subpixel area;
One color membrane substrates is oppositely arranged with described thin-film transistor array base-plate; And
One liquid crystal layer is disposed between described thin-film transistor array base-plate and the described color membrane substrates.
6. display panels as claimed in claim 5 is characterized in that described pixel electrode is provided with a plurality of slits.
7. display panels as claimed in claim 5 is characterized in that, the described first coupling capacitance dielectric layer also covers described second subpixel area, and described first subpixel area is identical with the height of described second subpixel area.
8. display panels as claimed in claim 5, it is characterized in that, cover the second coupling capacitance dielectric layer of layer of transparent on the pixel electrode of described second subpixel area, and the thickness of the described second coupling capacitance dielectric layer is less than the thickness of the described first coupling capacitance dielectric layer, and the wherein said first coupling capacitance dielectric layer is different with the specific inductive capacity of the described second coupling capacitance dielectric layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200558215U CN201159813Y (en) | 2008-02-29 | 2008-02-29 | Liquid crystal display board and image element structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200558215U CN201159813Y (en) | 2008-02-29 | 2008-02-29 | Liquid crystal display board and image element structure thereof |
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| Publication Number | Publication Date |
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| CN201159813Y true CN201159813Y (en) | 2008-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200558215U Expired - Lifetime CN201159813Y (en) | 2008-02-29 | 2008-02-29 | Liquid crystal display board and image element structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744243A (en) * | 2013-12-31 | 2014-04-23 | 南京中电熊猫液晶显示科技有限公司 | LCD (Liquid Crystal Display) panel and manufacturing method thereof |
-
2008
- 2008-02-29 CN CNU2008200558215U patent/CN201159813Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744243A (en) * | 2013-12-31 | 2014-04-23 | 南京中电熊猫液晶显示科技有限公司 | LCD (Liquid Crystal Display) panel and manufacturing method thereof |
| CN103744243B (en) * | 2013-12-31 | 2016-09-28 | 南京中电熊猫液晶显示科技有限公司 | A kind of display panels and manufacture method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20081203 Effective date of abandoning: 20080229 |