CN101930138A - Method for improving friction effect in manufacturing liquid crystal display - Google Patents
Method for improving friction effect in manufacturing liquid crystal display Download PDFInfo
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- CN101930138A CN101930138A CN2009101084681A CN200910108468A CN101930138A CN 101930138 A CN101930138 A CN 101930138A CN 2009101084681 A CN2009101084681 A CN 2009101084681A CN 200910108468 A CN200910108468 A CN 200910108468A CN 101930138 A CN101930138 A CN 101930138A
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Abstract
The invention discloses a method for improving friction effect in manufacturing a liquid crystal display. A friction roller is used for performing directional friction processing on the alignment layer surface of the liquid crystal display; and the operation projection of the friction roller and the length direction of an exposed insulating layer form an angle of being more than 5 degrees and less than 30 degrees. The method for improving the friction effect in the manufacturing the liquid crystal display of the invention takes the improved friction way to realize the operation projection of the friction roller and the length direction of the exposed insulating layer form an angle of being more than 5 degrees and less than 30 degrees and the influence on the villus of the friction cloth on the insulating layer is minimized, thereby solving the problems of friction defect caused by the friction mark transfer of the friction cloth in the process of switching the types and consequent black strips of the alignment layer, minimizing the construction cost and obtaining valuable improvement effect.
Description
[technical field]
The invention belongs to field of liquid crystal display, relate in particular to the improvement method of friction effect in a kind of LCD manufacturing.
[background technology]
Friction (Rubbing) orientation technology is the most ripe in the process for manufacturing liquid crystal display, the most reliable all the time, also is most widely used orientation technology.
The essence of friction orientation technology is after finishing the oriented layer printing and solidifying oriented layer, uses flannelette class material with specific direction friction orientation laminar surface, so that liquid crystal molecule can be arranged along the frictional direction of oriented layer in the future.
Another vital role of friction is to obtain twist angle and the visual angle that we need by different rubbing angles, generally according to requirement of client, finish the definition of visual angle and type-setting mode in the design phase, reach designing requirement by the angle of adjustment friction and the angle of liquid crystal display substrate rotation in actual production process, generally described visual angle is 6 or 12 points.
(described conductive electrode is generally tin indium oxide to have made conductive electrode on liquid crystal display substrate, abbreviation ITO) after the pattern, usually need on ITO, apply a layer insulating (described insulation course is generally SiO2 and makes formation), prevent, following ITO electric pole short circuit, after insulation course SiO2 solidifies, thickness is generally between 60-70nm, PAD face (being meant the panel zone of binding driving circuit IC) position part insulation course oriented layer coated with after be exposed, be not oriented layer and cover fully, the fine hair part of friction cloth and exposed directly effect of insulation course SiO2 in the actual friction process.
The quality of friction flannelette result of use has determined the quality of product effect to a great extent in the friction process, because of insulation course SiO2 surface structure special, be exposed to the outer insulation course SiO2 of oriented layer and can cause in various degree damage, thereby have a strong impact on the display effect of product the friction flannelette.
Fig. 1 is the structural representation of available liquid crystal display 10, comprise the upper substrate 101 and the infrabasal plate 102 that are oppositely arranged, on the upper substrate face relative, be respectively equipped with conductive electrode 103 and following conductive electrode 104 with infrabasal plate, on the last conductive electrode face relative, be respectively equipped with oriented layer 105 and following oriented layer 106 with following conductive electrode, circumferential edges at upper substrate and infrabasal plate also is provided with frame adhesive 109, described upper substrate 101, infrabasal plate 102 and frame adhesive 109 form the cavity of a sealing, accommodate liquid crystal layer 110 and wadding 111 in the described cavity and (be called for short Spacer, mainly play a supportive role), in order to prevent conductive electrode 103 and following conductive electrode 104 short circuits, usually be provided with insulation course 107 between conductive electrode 104 and the following oriented layer 106 down, described insulation course is generally the SiO2 layer.Further, in colour liquid crystal display device, also be provided with colored filter 108 between upper substrate 101 and the last conductive electrode 103.
Fig. 2 is tribology principle synoptic diagram in the LCD manufacturing, making rubbing on oriented layer 22 surfaces by certain orientation by the friction roller 28 (being pasted with friction cloth on the friction roller) of high speed rotating handles, make oriented layer 22 surfaces form tiny groove, the liquid crystal molecule that contacts with the oriented layer groove will be according to the frictional direction stay aligned, thereby obtains consistent orientation effect.The strength 25 that oriented layer 22 is subjected in the friction process is: on the horizontal direction displacing force 23 sums of the turning power of friction roller 28 and friction roller 28 again with vertical direction on the amount of being pressed into 24 synthetic of friction cloth fine hair, the size of the strength 25 that oriented layer 22 is subjected to has determined the quality of friction effect.Wherein, the gyratory directions 27 of friction roller 28 please refer to shown in Fig. 2 with the moving direction 6 of substrate 21.
Synoptic diagram when Fig. 3 designs for having insulation course and oriented layer now, simulated conditions when the design of insulation course and oriented layer is set type in the liquid crystal cell unit have been described, the viewing area of LCD has insulation course and oriented layer to cover, oriented layer in the viewing area 32 can effectively cover insulation course 33 generally speaking, but at the insulation course edge adjacent with the PAD face, there is partial insulative layer to be exposed to oriented layer outer (referring to the top part of insulation course among Fig. 3), the purpose of She Zhiing mainly is that PAD face lead-in wire electrode is shielded like this, because the electrode cabling in the liquid crystal display area all will be connected with the driving circuit (IC) of LCD through described edge; Secondly, also have two places to be printed on insulation course 33 on the PAD face, shown in Fig. 3, this design mainly is that the electrode to the driving circuit peripheral region plays protection.
Fig. 4 is existing simulation friction orientation process synoptic diagram, and it has described the process of actual friction, and the direction 46 that the gyratory directions 45 and the substrate of friction roller 44 moves as shown in the figure.In the friction process, (the operation projection is meant that the projection of friction roller in service on the vertical direction normal promptly becomes vertical zone with traffic direction in the operation projection of friction roller 44, the description of hereafter relevant operation projection all as mentioned above, no longer do specified otherwise) with the length direction of exposed insulation course 41 (as shown in Figure 4, horizontal direction is a length direction, vertical direction is a Width) vertical, the cloth fine hair of friction roller 44 causes damage because of the effect of the insulation course 41 that exposed, stayed vestige 43 on cloth fine hair, the result makes liquid crystal cell unit 42 display orientation striped after becoming box bad when causing conversion model (the type-setting mode difference of front and back product type).
Fig. 5 A and 5B are the synoptic diagram of friction bad (oriented layer secret note) in the liquid crystal cell unit, in process of production, the friction cloth that friction is used is done the friction directional process on oriented layer, every friction cloth generally will be handled 600 plate bases, can produce the product of several models simultaneously.As describing among Fig. 4, the insulation course effect that the cloth fine hair of friction roller is exposed causes damage, make on the friction cloth and stay the trace that rubs, the trace that rubs during the conversion model will be transferred on the next model, thereby when being shown, this model presents the oriented layer secret note shown in Fig. 5 A and 5B, this is bad, and to show as width in the liquid crystal cell unit basic identical, and the position changes along with the difference of pattern number, is the continuity displacement.For example pattern number is A1, A2, A3 ..., the position of the oriented layer secret note on the panel of LCD moves down gradually, and shows as the equally spaced trace that rubs on friction cloth, and is concrete as the oriented layer secret note 51 and 52 among Fig. 5 A and the 5B.There is very big hidden danger in this type of phenomenon in production of liquid crystal displays is made, the loss that causes also is inestimable, and the problem that needs to solve is how to reduce the generation probability of this type of phenomenon or avoid this type of phenomenon.
[summary of the invention]
Technical matters to be solved by this invention provides the rubbing method in a kind of LCD manufacturing, avoid the damage of the insulation course that exposes to friction cloth fine hair, perhaps reduce the degree of injury of exposed insulation course to greatest extent, and then solve the problem that produces the oriented layer secret note friction cloth fine hair.
The present invention is achieved by the following technical solutions:
A kind of method of improving friction effect in the LCD manufacturing, utilize friction roller to make directed friction treatment on the oriented layer surface of described LCD, the operation projection of described friction roller becomes greater than the angle of 5 degree less than 30 degree with the length direction of the insulation course that exposes.
The present invention improves the method for friction effect in the LCD manufacturing, by improving friction mode, the operation projection of friction roller is become with the length direction of the insulation course that exposes greater than the angles of 5 degree less than 30 degree, making the fine hair of friction cloth, be reduced to by the influence degree of insulation course minimum, the trace that rubs of friction cloth shifts and causes friction bad when having avoided model to switch, produce the problem of oriented layer secret note, in the enforcement cost is reduced to minimumly, obtained the valuable effect of improving.
Feature of the present invention and advantage will be elaborated by embodiment and accompanying drawing.
[description of drawings]
Fig. 1 is the structural representation of available liquid crystal display.
Fig. 2 is a tribology principle synoptic diagram during the available liquid crystal display is made.
Synoptic diagram when Fig. 3 is existing insulation course and oriented layer design.
Fig. 4 is existing simulation friction orientation process synoptic diagram.
Fig. 5 A, 5B are the synoptic diagram of friction bad (oriented layer secret note) in the liquid crystal cell unit.
Fig. 6 is the simulation friction synoptic diagram of a kind of specific embodiment provided by the invention.
Fig. 7 is the simulation friction synoptic diagram of a certain type product in the prior art.
[embodiment]
In order to make purpose of the present invention, technical scheme and advantage clearer, below will the present invention be further elaborated by embodiment and accompanying drawing.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
A kind of method of improving friction effect in the LCD manufacturing, utilize friction roller to make directed friction treatment on the oriented layer surface of described LCD, wherein, the operation projection of described friction roller becomes greater than the angles of 5 degree less than 30 degree with the length direction of the insulation course that exposes.
Fig. 6 is the simulation friction synoptic diagram of a kind of specific embodiment provided by the invention, it has been described and has improved the later friction process of friction mode, and the friction cloth fine hair of its exposed 61 pairs of friction rollers 63 of insulation course when friction of the liquid crystal cell unit 62 in the LCD acts on to a great extent and reduces.Particularly, the direction of motion of liquid crystal display substrate such as the direction of arrow among Fig. 6 64, substrate turns clockwise 80 degree (when substrate is normally placed, its length in the horizontal direction, width is at vertical direction, all be the original state when normally placing hereafter with respect to substrate relevant for the anglec of rotation of substrate, hence one can see that, the length direction of substrate is consistent with the length direction of described exposed insulation course), friction roller 63 turns clockwise 45 degree (in the prior art, the traffic direction of friction roller is consistent with the length direction of substrate, and friction roller itself is consistent with the Width of substrate, so friction roller itself is vertical with its traffic direction, all be in prior art the original state during the friction roller operation hereafter) relevant for the anglec of rotation of friction roller, therefore, in the substrate motion friction process, become 55 degree angles between friction roller 63 and the liquid crystal cell unit 62, the operation projection of promptly described friction roller 63 becomes 10 to spend angles with the length direction of exposed insulation course 61.Aforementioned exposed insulation course is meant that outside the viewing area of LCD the insulation course edge adjacent with the PAD face has partial insulative layer to be exposed to outside the oriented layer.
But in fact the optimal mode of the present invention is: friction roller 63 is in friction process, the operation projection of described friction roller 63 becomes 0 degree angle with the length direction of the insulation course 61 that exposes, reach and at utmost reduce the insulation course that exposes purpose the wearing and tearing of friction cloth, but the angle of friction roller 63 rotations is restricted, can only to 50 degree scopes, rotate at-50 degree, and realize that 0 degree needs friction roller rotation 55 degree.
Fig. 7 is the simulation friction synoptic diagram (this example is the counter-example demonstration) of a certain type product in the prior art, state when this figure has simulated this model infrabasal plate friction, this model is when the friction process operation, after friction cloth fine hair is rubbing 50 infrabasal plates, taking off friction roller 74 can observe tangible abrasion mark 73 and stay on the friction cloth fine hair, it shows as equally spaced striped on friction cloth fine hair, identical with the position that insulation course exposed on the liquid crystal cell unit 72 71 is corresponding, its quantity also liquid crystal cell unit 72 quantity with column direction is identical.Observe upper substrate (existing process conditions under regulation upper substrate do not print insulation course) simultaneously in the surface state of friction cloth fine hair after 50 and 600 of rubbing, all do not have similar abrasion mark.
In this example, 71 one-tenth vertical frictions of insulation course exposed on the operation projection of friction roller 74 friction roller in friction process and the liquid crystal cell unit 72 are an angle of 90 degrees, just tangible abrasion mark 73 is arranged rubbing tens, can prove the influence to the cloth fine hair that rubs when under certain angle, rub of exposed insulation course from the performance of this example and bad phenomenon to observe on the friction roller 74 friction cloth fine hair.We have confirmed viewpoint of the present invention by the verification experimental verification of different substrate angle and roller angle.
For the friction mode that reaches after the improvement is reduced to minimum level to the influence of product, we optimize the friction condition of some product types according to existing production status and the above argumentation of embodiment, and the parameter in the concrete improvement project sees Table 1 and table 2.
Table 1: horizontal version model change condition corresponding tables
Table 2: vertical setting of types version model change condition corresponding tables
We have carried out reaching 6 months tracking to the product effect of change behind the friction condition, do not find the phenomenon that the oriented layer secret note is bad again; And the frequency of changing bad phenomenon generation up till now is very high, and the technical scheme that proposes according to this paper is applied in the actual production, has obtained good effect.
The present invention improves the method for friction effect in the LCD manufacturing, by improving friction mode, the operation projection of friction roller is become with the length direction of the insulation course that exposes greater than the angles of 5 degree less than 30 degree, making the fine hair of friction cloth, be reduced to by the influence degree of insulation course minimum, the trace that rubs of friction cloth shifts and causes friction bad when having avoided model to switch, produce the problem of oriented layer secret note, in the enforcement cost is reduced to minimumly, obtained the valuable effect of improving.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (3)
- One kind improve LCD make in the method for friction effect, utilize friction roller to make directed friction treatment on the oriented layer surface of described LCD, it is characterized in that the operation projection of described friction roller becomes greater than the angles of 5 degree less than 30 degree with the length direction of the insulation course that exposes.
- 2. the method for improving friction effect in the LCD manufacturing according to claim 1 is characterized in that, the operation projection of described friction roller becomes the angles of 10 degree with the length direction of the insulation course that exposes.
- 3. the method for improving friction effect in the LCD manufacturing according to claim 1 and 2, it is characterized in that, described exposed insulation course is meant that outside the viewing area of LCD the insulation course edge adjacent with the PAD face has partial insulative layer to be exposed to outside the oriented layer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101084681A CN101930138A (en) | 2009-06-26 | 2009-06-26 | Method for improving friction effect in manufacturing liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101084681A CN101930138A (en) | 2009-06-26 | 2009-06-26 | Method for improving friction effect in manufacturing liquid crystal display |
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| CN101930138A true CN101930138A (en) | 2010-12-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116623A (en) * | 2015-09-11 | 2015-12-02 | 康惠（惠州）半导体有限公司 | Method for eliminating unevenness of LED friction grooves |
| CN109799651A (en) * | 2019-03-14 | 2019-05-24 | 信利半导体有限公司 | A kind of the friction matching method and friction matching apparatus of display base plate |
| WO2020088383A1 (en) * | 2018-10-29 | 2020-05-07 | 京东方科技集团股份有限公司 | Display substrate, method for manufacturing same, and display device |
-
2009
- 2009-06-26 CN CN2009101084681A patent/CN101930138A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116623A (en) * | 2015-09-11 | 2015-12-02 | 康惠（惠州）半导体有限公司 | Method for eliminating unevenness of LED friction grooves |
| WO2020088383A1 (en) * | 2018-10-29 | 2020-05-07 | 京东方科技集团股份有限公司 | Display substrate, method for manufacturing same, and display device |
| US11567370B2 (en) | 2018-10-29 | 2023-01-31 | Hefei Xinsheng Optoelectronics Technology Co., Ltd | Display substrate and manufacturing method thereof, and display device |
| CN109799651A (en) * | 2019-03-14 | 2019-05-24 | 信利半导体有限公司 | A kind of the friction matching method and friction matching apparatus of display base plate |
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Application publication date: 20101229 |