Display panels and manufacture method thereof
Technical field
The present invention relates to a kind of display device and manufacture method thereof, and be particularly related to a kind of display panels and manufacture method thereof.
Background technology
Multimedia society improves rapidly, is indebted to the tremendous progress of semiconductor element and display device mostly.With regard to display, have that high image quality, space utilization efficient are good, the Thin Film Transistor-LCD (Thin Film TransistorLiquid Crystal Display, TFT LCD) of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.
Fig. 1 is the diagrammatic cross-section of known display panels.Please refer to Fig. 1, display panels 100 is made of infrabasal plate 110, liquid crystal layer 120 and upper substrate 130.Wherein, liquid crystal layer 120 is sealed between infrabasal plate 110 and the upper substrate 130 by frame glue (not shown).In addition, because the various performances of LCD are as answer speed, contrast (contrast) degree and angle of visibility etc., all relevant with bug hole spacing d.Therefore, generally all can control bug hole spacing d closely according to the optical characteristics of liquid crystal material.In addition, if bug hole spacing d has the value of difference, then cause easily to show inhomogeneous phenomenon, the visibility of image also will reduce significantly.So, between infrabasal plate 110 and upper substrate 130, also can be provided with sept (spacer) 102 usually, so that bug hole spacing d keeps definite value.
With present technology, sept 102 is to be formed in the lump on the upper substrate 130 in the manufacturing process of upper substrate 130 mostly, thereby this sept 102 is called SOC (spacer oncolor filter).In addition, because sept 102 contacts fully with the surface of contact of infrabasal plate 110, do not have cured layer between the two, therefore, when side force F that display panels 100 is added, cause upper substrate 130 and infrabasal plate 110 relative dislocation easily, and then produce abnormal image and show.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of display panels to have more even bug hole spacing (cell gap).
Another object of the present invention is to provide a kind of manufacture method of display panels, liquid crystal is more than needed spends to increase, and light leak (light leakage) phenomenon of avoiding display panels to be caused because of the two substrates dislocation after assembling.
The present invention proposes a kind of display panels, mainly is made of active cell array, prebasal plate, at least one first sept and liquid crystal layer.Wherein, active cell array mainly by substrate, many scan distribution, many data wirings, a plurality of active member and a plurality of pixel electrodes are constituted.Data wiring with scan distribution and on substrate, distinguish a plurality of pixel regions, and these data wirings and scan distribution and have at least one opening.These active members are separately positioned in the above-mentioned pixel region, scan distribution and data wiring with what be electrically connected on correspondence.Above-mentioned pixel electrode also is to be separately positioned in these pixel regions, to be electrically connected on the active member of correspondence.
From the above, prebasal plate is arranged at the active cell array top.First sept is arranged between prebasal plate and the active cell array, and first sept partly is embedded in the opening.Liquid crystal layer then is arranged between active cell array and the prebasal plate.
In preferred embodiment of the present invention, above-mentioned display panels also comprises second sept, and it is arranged at prebasal plate and scans between distribution and/or the data wiring.And in example, above-mentioned first sept and second sept are column spacers.
In preferred embodiment of the present invention, the degree of depth of above-mentioned opening is less than the maximum flexibility deflection of second sept.In example, the degree of depth of this opening is less than 0.25 micron.
In preferred embodiment of the present invention, the floorage of above-mentioned opening be contacted with more than or equal to first sept prebasal plate area 2/3.
In preferred embodiment of the present invention, above-mentioned substrate before is a colored filter.In addition, above-mentioned active member is a thin film transistor (TFT).
The present invention proposes a kind of manufacture method of display panels, and it provides active cell array earlier, this active cell array by substrate, many scan distribution, many data wirings, a plurality of active member and a plurality of pixel electrodes are constituted.Wherein, these data wirings and scan distribution and have at least one opening, and these data wirings with scan distribution and on substrate, distinguish a plurality of pixel regions, and these active members and pixel electrode promptly are to be arranged at respectively in these pixel regions.
From the above, then on prebasal plate, form at least one first sept and at least one second sept, then on active cell array, form liquid crystal layer on the other hand.Afterwards, prebasal plate is fitted in the active cell array top, so that first sept partly is embedded in the opening.
In preferred embodiment of the present invention, form before the liquid crystal layer, also be included in and form frame glue on the substrate, in order to around living liquid crystal layer, and liquid crystal layer is enclosed on the active cell array.
In preferred embodiment of the present invention, the method that prebasal plate is fitted in the active cell array top is the top that earlier prebasal plate is arranged at active cell array, so that first sept corresponds to opening.Then, pressing active cell array and prebasal plate solidify frame glue afterwards again, so that prebasal plate is fixed in the top of active cell array.Wherein, the method for curing frame glue is thermal curing method or ultraviolet light polymerization method.
In preferred embodiment of the present invention, active cell array is a thin film transistor (TFT) array, and this prebasal plate is a colored filter.In addition, in another embodiment, active cell array is the lamination type colour filter array, and prebasal plate then is made of base material and setting shared electrode thereon.
The present invention scans in the manufacturing process of distribution and data wiring in formation, forms opening thereon simultaneously, so that after the display panels assembling, first sept that is arranged on the prebasal plate can partly be embedded in the opening.Therefore, even the side force that prebasal plate is subjected to add also can not produce dislocation with active cell array.Hence one can see that, and the present invention can be under the prerequisite that does not increase the light shield number, solve because of prebasal plate and active cell array take place dislocation cause the abnormal problem of display image.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the diagrammatic cross-section of known display panels.
Fig. 2 is the diagrammatic cross-section of display panels in the present invention's the preferred embodiment.
Fig. 3 is the part schematic top plan view of the active cell array 210 of Fig. 2.
Fig. 4 to Fig. 5 is respectively the part schematic top plan view of the active cell array of display panels in another preferred embodiment of the present invention.
Fig. 6 is the diagrammatic cross-section of display panels in one of the present invention preferred embodiment.
Fig. 7 A to Fig. 7 D is the manufacturing process sectional view of display panels in one of the present invention preferred embodiment.
Fig. 8 is that the frame glue of Fig. 7 B is arranged at the schematic perspective view on the active cell array.
The main element description of symbols
100,200,800: display panels
102: sept
110: infrabasal plate
120,230: liquid crystal layer
130: upper substrate
202: the first septs
204: opening
206: the second septs
210,610: active cell array
221: base material
212: substrate
214: scan distribution
216: data wiring
217: pixel region
218: active member
219: pixel electrode
220: prebasal plate
224: color filter film
226: black matrix
228: shared electrode
232: liquid crystal molecule
602: the liquid crystal injection region
620: frame glue
F: side force
H: the opening degree of depth
Embodiment
Fig. 2 is the diagrammatic cross-section of display panels in the present invention's the preferred embodiment.Fig. 3 then is the part schematic top plan view of the active cell array 210 of Fig. 2.Please be simultaneously with reference to Fig. 2 and Fig. 3, display panels 200 mainly is made of active cell array 210, prebasal plate 220, first sept 202 and liquid crystal layer 230.Wherein, active cell array 210 is a thin film transistor (TFT) array (thin film transistor array, TFT array), its by substrate 212, many scan distribution 214, many data wirings 216, a plurality of active member 218 and a plurality of pixel electrodes 219 are constituted.Scan distribution 214 and be arranged on the substrate 212, and on substrate 212, distinguish a plurality of pixel regions 217 with data wiring 216.
Please continue with reference to Fig. 2 and Fig. 3, data wiring 216 has opening 204, and it is to form with in the technology with data wiring 216.Particularly the distance between opening 204 and the pixel electrode 219 is greater than 3 microns, with the aperture opening ratio (aperture ratio) of avoiding influencing display panels 200.In addition, active member 218 is thin film transistor (TFT)s, and each active member 218 all is arranged in the pixel region 217, and be electrically connected to correspondence scan distribution 214 and data wiring 216.Pixel electrode 219 also is arranged in the pixel region 217, and is electrically connected to the active member 218 of correspondence.
Please refer to Fig. 2, prebasal plate 220 is arranged at active cell array 210 tops.In the present embodiment, prebasal plate 220 is a colored filter (color filter), its mainly by base material 221, a plurality of color filter film (color filter film) 224 (Fig. 2 only draws), black matrix (blackmatrix, BM) 226 and shared electrode 228 constitute.Wherein, color filter film 224 all is arranged on the base material 221 with black matrix 226, and shared electrode 228 then covers color filter film 224 and black matrix 226.
Please continue with reference to Fig. 2, first sept 202 is arranged between prebasal plate 220 and the active cell array 210, and first sept 202 is partly embedded in the opening 204.What deserves to be mentioned is, because column spacer is with under spherical sept is compared, column spacer can provide display panels uniformly cell gap, preferable light transmission rate and higher contrast ratio, therefore present embodiment is that first sept 202 is designed to column spacer, to reach above-mentioned advantage.More particularly, the floorage of opening 204 is more than or equal to 2/3 of the contact area of first sept 202 and prebasal plate 220, so that first sept 202 is lived in embedding effectively.
From the above, the present invention's display panels 200 is not influencing aperture opening ratio part (just on the data wiring 216), design can make first sept 202 partly be embedded in wherein opening 204, with avoid display panels 200 after assembling because of suffering external force to make active cell array 210 and prebasal plate 220 misplace, and then produce abnormal image demonstration.It should be noted that in other embodiments opening 204 can also design and scan on the distribution 214, it can not have influence on the aperture opening ratio of display panels 300 equally, as shown in Figure 4.Certainly, the present invention can also design opening 204 simultaneously at data wiring 216 and scan on the distribution 214, as shown in Figure 5.
Fig. 6 is the diagrammatic cross-section of display panels in another preferred embodiment of the present invention.Please refer to Fig. 6, the present invention's display panels can also include second sept 206, to increase the loading rigidity of display panels.Wherein, second sept 206 also is to be arranged between active cell array 210 and the prebasal plate 220, and in more detail, second sept is arranged at prebasal plate 220 and scans between distribution 214 and/or the data wiring 216.
It should be noted that second sept 206 is not embedded in the opening 204 that scans on distribution 214 and the data wiring 216.And, those skilled in the art will be appreciated that, first sept 202 and second sept 206 are made of resilient material mostly, therefore in the process of pressing active cell array 210 and prebasal plate 220, second sept 206 will suffer external force and produce distortion, and then between first sept 202 and second sept 206, cause difference in height, and this difference in height promptly is the degree of depth h of opening 204.Wherein, produce plastic yield for fear of second sept 206, thereby influence the cell gap homogeneity of display panels 700, the deflection of second sept 206 must drop in its elastic deformation area's the scope.That is to say that the degree of depth h of opening 204 is the maximum flexibility deflections less than second sept 206.For instance, if the maximum flexibility deflection of second sept 206 is 0.25 micron, then the degree of depth h of opening 204 needs less than 0.25 micron.
What is particularly worth mentioning is that, from the above, after display panels 700 assemblings of Fig. 6 are finished, can produce difference in height between first sept 202 and second sept 206.Therefore, if (one drop fill ODF) forms the liquid crystal layer 230 of display panels 700, can increase degree more than needed liquid crystal drop under, with the bad incidence of reduction engineering with the formula injection method that drips.Below will illustrate the technology of the display panels that has difference in height between the sept, and the active cell array of this display panels and Fig. 3, Fig. 4 or active cell array shown in Figure 5 are identical, and the active cell array of hereinafter supposing this display panels illustrates for the active cell array of Fig. 5, but it is not in order to limit the present invention.
Please earlier with reference to Fig. 5, active cell array 610 at first is provided, it is a thin film transistor (TFT) array, and the active cell array 610 of Fig. 5 the active cell array 210 with Fig. 3 is identical haply, unique different part only is that the distribution 214 that scans of the active cell array 610 of Fig. 5 all has opening 204 with data wiring 216, therefore no longer describes active cell array 610 herein in detail.
Then, please refer to Fig. 7 A, on a prebasal plate 220, form first sept 202 and second sept 206.Wherein, first sept 202 and second sept 206 are made of resilient material.It should be noted that the present invention does not limit the quantity of first sept 202 and second sept 206, those skilled in the art can be required and decide in its sole discretion according to reality.In addition, prebasal plate 220 colored filter shown in Figure 2.Under this assumption, first sept 202 and second sept 206 are formed at black matrix 226 (see figure 2)s top, so can not influence the aperture opening ratio of display panels.
Then, please refer to Fig. 7 B, on active cell array 610, form liquid crystal layer 230.What deserves to be mentioned is, before forming liquid crystal layer 230, must on active cell array 610, form frame glue 620 earlier, and on active cell array 610, cross a liquid crystal injection region 602 (as shown in Figure 8), utilize the formula injection method that drips in liquid crystal injection region 602, to inject liquid crystal molecule 232 afterwards, to form liquid crystal layer 230.Thus, liquid crystal layer 230 can be sealed in follow-up manufacturing process between active cell array 610 and the prebasal plate 220.
Then please refer to Fig. 7 C, prebasal plate 220 is arranged at the top of active cell array 610, so that first sept 202 is corresponding to the opening on the active cell array 610 204.Then, pressing prebasal plate 220 and active cell array 610 are so that first sept 202 partly embeds in the opening 204, shown in Fig. 7 D.At this moment, second sept 206 has a deflection, and this deflection promptly is the degree of depth h of opening 204.The explanation of embodiment as described above, the degree of depth h of opening 204 for example is the maximum flexibility deflection less than second sept 206.
Particularly, owing to after active cell array 610 is assembled with prebasal plate 220, can have difference in height between first sept 202 and second sept 206, so the present invention can increase splashing into of liquid crystal molecule 232 degree more than needed, so that in response to the demand of different machines, and then improve process yield.With 20 inches display panels is example, and the active cell array 610 with opening 204 can improve 20% liquid crystal degree more than needed.
Afterwards, solidify the frame glue 620 of Fig. 7 D, with the fixing relative position of active cell array 610 and prebasal plate 220, this promptly finishes the assembling of display panels 800.Wherein, frame glue 620 is heat curing (thermal curing) frame glue or ultraviolet light polymerization (UV curing) frame glue, and the method for curing frame glue 620 promptly is according to the characteristic of frame glue thermal curing method and ultraviolet light polymerization method to be arranged.In addition, the subsequent technique of display panels 800 as technology that those skilled in the art understood, repeat no more herein.
In sum, the present invention has following advantage:
1. the present invention forms opening on active cell array, so that after the display panels assembling, first sept that is arranged on the prebasal plate can partly be embedded in the opening.Therefore, even the side force that prebasal plate is subjected to add also can not produce dislocation with active cell array.Hence one can see that, and the present invention can avoid showing because of the undesired image that dislocation caused takes place for prebasal plate and active cell array.
2. the opening on the present invention's the active cell array is positioned at and scans distribution and data wiring, and opening is forming with in the technology with scanning distribution and data wiring.In other words, the present invention needn't add light shield in addition can form opening on active cell array.
3. the present invention is provided with on prebasal plate corresponding to first sept of the opening of active cell array and not corresponding to second sept of opening, therefore can increase the loading rigidity of display panels.And, after prebasal plate and active cell array are finished assembling, will produce difference in height between first sept and second sept, can increase the degree more than needed in the manufacturing process that liquid crystal splashes into, thereby can be, and then improve for yield rate in response to the demand of various different machines.
Though the present invention announces 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 invention; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking the claim person of defining.