CN1153496A - Apparatus and method for printing color-filter - Google Patents
Apparatus and method for printing color-filter Download PDFInfo
- Publication number
- CN1153496A CN1153496A CN 95191413 CN95191413A CN1153496A CN 1153496 A CN1153496 A CN 1153496A CN 95191413 CN95191413 CN 95191413 CN 95191413 A CN95191413 A CN 95191413A CN 1153496 A CN1153496 A CN 1153496A
- Authority
- CN
- China
- Prior art keywords
- pattern
- transfer printing
- black matrix
- ink
- printing layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
A method and apparatus for making color filters for liquid crystal display panels. A transfer layer is formed on a collector roll, and a raised pattern corresponding to the desired black matrix pattern is formed on the transfer layer by an embossing means. A plurality of colored ink patterns is formed in the appropriate location within the boundaries formed by the raised pattern, thereby forming the multicolor image that will become the color filter. This multicolored image is then transferred to the substrate. Preferably, the multicolored ink pattern is deposited to a substrate while in a deformable state, flattened during the deposition process, and the deformed, more uniform shape of the printed cells is thereafter retained, preferably by curing during deposition to the substrate.
Description
Invention field
The present invention relates to the colour filter (color filter) of LCD panel, black matrix pattern and manufacture method thereof on this class colour filter.
Background technology
LCD panel (LCD), especially color LCD plate are used for television set, the projection television system of flat pattern screen and videotape video tape recorder view finder etc., estimate also to have in the future more applications.
The manufacturing of AMLCD comprises some steps.The first step is the preparation front glass panel, comprises the colour filter unit deposition on the sheet base suitable such as glass etc.The deposition of colour filter generally comprises the coloured silk point of black matrix pattern and three primary colors (be generally redness, green and blue, perhaps be yellow, magneta colour and blue-green) or colored cellular pattern (color cell pattern) is deposited in the space that black matrix" ticks.The width that forms the track of black matrix" generally is about the 15-25 micron, the about 0.5-2 micron of thickness.The width of red, green and blue look cellular generally is about 70-100 micron number magnitude, and length is the 200-300 micron.Colored cellular generally is printed on thickness less than about 10 microns and preferably less than on 5 microns the film, and colored cellular must be printed additional equably and accurately aim at and be positioned in the pattern that black matrix" forms.Generally, plane layer, transparency conducting layer and polyurethane is deposited upon the glass chip of making the front on the color filter element by being aimed at.Although also can use other materials, general transparency conducting layer is indium tin oxide (ITO).
In second step, with the glass plate formation thin film transistor (TFT) or the diode of one discrete (back), and metal interconnecting wires.Each transistor plays the on/off switch to the single color pixel in the display board.Last the 3rd step is this two boards of combination, comprises liquid crystal material is injected between the two boards, to form liquid crystal screen.
One of most crucial steps of making colour filter is the preparation black matrix pattern.The definition at black matrix" edge is extremely important.Different with painted printing ink cellular, when checking finished product, can tell because of printing the various variations that factor such as mobile produces the black matrix" edge.On the other hand, generally the edge of color pixel is hidden by black matrix pattern.Therefore, black matrix" has been covered the changing capability at color pixel edge to a certain extent, but does not have thing can cover the changing capability of black matrix".
In addition, because black matrix pattern must be aimed at all transistors of formation thin film transistor (TFT) on being positioned at another glass plate, so compare with color dot pattern, black matrix pattern is much strict to the requirement of aiming at the location.On the other hand, because the transition region that constitutes between each color point that the grid of black matrix pattern will constitute color pixel hides, so the width of black matrix pattern is located color pixel leeway is provided for aiming at.
Typical black matrix pattern design is made up of elongated black line grid, and they are interlaced, form coffin, and colored cellular pixel printing ink will be positioned at these spaces.This grid matrix also comprises littler black matrix", and they are along the edge of grid cellular, and the thin film transistor (TFT) (TFT) that is positioned on the glass plate of opposite in position and the LCD is corresponding.Owing to aim at the requirement height of location, so preferably so form black matrix", promptly when overlooking colour filter, just have the black matrix" of typical rectangular subpixel lattice, on black matrix", can only see the edge of clear and definite.The cross sectional shape that constitutes the grid of this black matrix pattern also should be the rectangle that the edge is square.The corner of grid should be vertical with intersection point in this black matrix pattern, thereby when overlooking colour filter, can only see square edge.Unfortunately, when successfully printing off the color dots that constitutes color pixel with some printing technology, the black matrix" line power that goes for thinner (thereby resolution ratio is higher) has made the resolution capability of traditional printing technology reach the limit.Owing to reached this resolution limit, be difficult to keep clear with printing technology.Use the greatest problem of this ink printing technology to be, because the tension force of printing ink, the printing ink cross sectional shape can present circle, and the edge becomes irregular.
Thus, generally prepare black matrix pattern, promptly use printing technology to make the remainder of color filter pattern with photolithography.Photolithography comprises many generation steps, and is more more complex than printing process.In addition, photolithography generally than ink printing technology costliness many.
Another important step during colour filter forms is the red, green and blue color point (also claiming colored cellular) that forms colour filter.Preferably should make their thickness smooth as much as possible and even these colored cellular depositions.Previously being used for the printing color-filter method of patterning can not make smooth enough multicolour pattern.This mainly is because existing ink deposition method can produce the printing ink cellular of circle or triangular-section.Therefore, on multicolour pattern, apply one deck plane layer usually, to slow down the coating smoothness that deposition process causes or the deficiency of thickness evenness.The transparent flat layer also plays a protective role, and can prevent ion migration back and forth between ITO layer and multicolour pattern layer.Plane layer should deposit smoothly as much as possible and smooth.
For the ease of depositing smooth plane layer, wish that multicolour pattern is smooth, smooth, and be basically parallel to the lower surface of glass chip.If because the thickness of pattern changes, radiative intensity also will change, so the uniform multicolour pattern of thickness just is hopeful to obtain best demonstration contrast and color performance.
Be desirable to provide uniform black matrix pattern of the high and thick degree of quality and printing ink color filter array, their resolution ratio and aligning location increase, and lower than easy making of existing color filter array and cost.Also wish to use than now reaching these quality with the less process of process steps.
Summary of the invention
The present invention relates to be used for making the method for liquid crystal dummy device colour filter.On such as gathering-devices such as collection cylinder or collecting boaries, provide a transfer printing layer.On transfer printing layer, form the corresponding protrusion pattern of best and required black matrix pattern then.Then each cellular of red, green and blue look is deposited on the transfer printing layer by protruding the formed recess of pattern, to form color filter pattern.After forming multicolour pattern on the transfer printing layer, be transferred on the sheet base the assembly of transfer printing layer and color filter pattern is whole, cause color filter pattern to contact with glass chip.Thus, above transfer printing layer is positioned at, and play the effect of plane layer and/or protective layer.During printing operation and afterwards, the protrusion pattern on the transfer printing layer helps colored cellular to keep isolating.
Preferably provide the pattern of the protrusion on the transfer printing layer with the form of protruding black matrix pattern.This protrusion black matrix pattern can not only help the colored ink cellular to keep isolating, and can provide definition high black matrix pattern.Protrude black matrix pattern and mean that the upper surface of black matrix pattern is above the transfer printing layer upper surface when transfer printing layer is positioned on the gathering-device surface.The thickness of black matrix" should be about the 1-10 micron, and it is then better that thickness is about the 2-6 micron, and the thickness that exceeds the transfer printing layer remainder preferably is about the 3-4 micron.
In one embodiment of the invention, before the colored cellular of each pixel of reception process colour filter, transfer printing layer is contacted with the cylinder with matrix pattern, its drop centre type pattern is corresponding with required black matrix pattern.This causes forming the protrusion pattern corresponding with required black matrix pattern on transfer printing layer.If desired, black matrix" printing ink can be added to the top of protruding pattern, to form the black matrix pattern that protrudes.
Another kind method is, black matrix pattern is added in the LCD panel on another position.For example, black matrix pattern can be added on the glass chip that is loaded with thin film transistor (TFT), perhaps on the thin film transistor (TFT) or under thin film transistor (TFT).In these are used, preferably black matrix pattern is deposited on the top of ITO layer.In these embodiments, protrude the pattern role and mainly be, isolate red, green and blue look cellular, and be convenient to colored cellular and aim at the location with black matrix pattern.
In the preferred embodiment of the black matrix pattern that form to protrude, form the black matrix" ink logo at the recess of intaglio plate imaging surface, printing image cylinder or forme with the corresponding matrix pattern of required black matrix pattern provided as having.Before transfer printing layer deposition or during, preferably make the black matrix" ink setting or to the small part drying, so that accurately duplicate the shape of the recessed pattern of intaglio plate.Generally, the printing ink in the intaglio plate has negative meniscus, and the ink pellet surface of the intaglio pattern of depression is bent downwardly, and is lower than the surface of forme.Therefore, when transfer printing layer during, be preferably fluid, thereby it can contact and cling black matrix" printing ink at contact black matrix" printing ink.When the transfer printing layer of fluid contacts with black matrix" printing ink, make the transfer printing layer drying, thereby make printing ink break away from the recess of intaglio plate pattern.
With the ink printing method red, green and blue look cellular is deposited on the formed recess of protrusion pattern (the preferably black matrix pattern of Tu Chuing).Then, when the printing ink that constitutes colored cellular still during deformable, with transfer printing layer, colored ink cellular and optionally the assembly that constituted of black matrix pattern be transferred on the glass chip.In this way, the deformable colored ink cellular with softness is squeezed between transfer printing layer and the glass.Because at colored cellular printing ink between sheet base depositional stage is plastic deformation, therefore between sheet base depositional stage, red, green and blue color ink cellular is extruded, thereby with the uneven cross section leveling of printing ink cellular.This makes the colored ink cellular can obtainable cellular than with existing method more smooth, and thickness is more even, and has more smooth more smooth end face.Therefore, transfer printing layer can help the colored ink distortion.Because after sheet base deposition, transfer printing layer covers on the colored ink pattern,, help to keep more uniform printing ink cellular shape so transfer printing layer also plays the effect of plane layer or protective layer.In this respect, the present invention is different with prior art, in prior art, at first color filter array is deposited on the sheet base, applies plane layer then in next process steps.Printing ink is preferably in during the transfer printing or just fully sclerosis soon afterwards, so that the permanent ink dot shape that keeps leveling.For example, this can be by using radiant drying type printing ink and in the extruding transfer printing ink setting being realized.
For example, acrylic compounds polyimide, epoxides, acrylic compounds, ethene ethers, polyurethanes, polyesters and propylene acidifying or the metering system acidifying, ester class, urethanes class, epoxides or the other materials that are commonly used for plane layer in the available conventional colour filter device form transfer printing layer.A kind of preferable transfer layer materials is a radiant drying type acrylate material, such as radiation can dry epoxy acrylate.The most handy radiant drying section bar material is made transfer printing layer, when it accepts to constitute the ink logo of black matrix pattern with box lunch, is dried.Transfer printing layer is deposited on the gathering-device, forms film, is generally less than 10 microns.
Method of the present invention is compared with the existing method that is used to form black matrix pattern has many advantages.At first, it is square clearly demarcated to make edge contour now, and split-hair black matrix pattern.Thus, the definition of black matrix pattern of the present invention improves a lot than prior art.
In addition, because transfer printing layer has played the effect of the plane layer of original place formation, so no longer need to form the subsequent operation of plane layer.
In addition, through the prescription to printing ink, collection cylinder is after the transfer printing layer application of force, transfer printing layer applies extruding to printing ink again, thereby the coloring printing ink cellular is deformed into more uniform shape, and wherein said printing ink is used for forming the cellular of red, green and blue look, can be out of shape between sheet base depositional stage.Be preferably in when transfer operation applies extruding and make ink setting, thereby during electroless copper deposition operation, keep this ink dot shape uniformly.This ink dot shape uniformly can be protected and keep to transfer printing layer.
Summary of drawings
Figure 1A is the sectional view with the black matrix pattern of existing ink printing method formation.
Figure 1B is the perspective view of the black matrix pattern that forms on transfer printing layer with method of the present invention.
Fig. 2 shows the equipment that is used to form the black matrix pattern of protrusion according to the present invention.
Fig. 3 shows another equipment that is used to form the black matrix pattern of protrusion according to the present invention.
Fig. 4 shows the color filter pattern that will make according to the present invention and is deposited on the glass chip.
Fig. 5 shows the preferable printing equipment that is used to implement the inventive method.
Better embodiment of the present invention
In the present invention, a transfer printing layer is deposited on the gathering-device such as collection cylinder.Then, transfer printing layer is pressed protruding, on transfer printing layer, to form the protrusion pattern corresponding with required black matrix pattern.Red, green and blue color point pattern be deposited on by the transfer printing layer epirelief go out the recess that pattern forms, and with step with transfer printing layer, protrude pattern (possible yes or no black matrix pattern) and the assembly of colored cellular is transferred on the glass chip.
Transfer printing layer provides one in order to form the special surface of black matrix pattern and red, green and blue (perhaps yellow, deep red red and bluish-green) color point pattern.Forming whole being transferred on the sheet base of aggregate that color filter pattern can make transfer printing layer, black matrix pattern and color dot pattern constitute on the transfer printing layer, thereby colour filter is clipped between transfer printing layer and the sheet base.Because transfer printing layer has played the effect of the plane layer that forms on the spot, so needn't form plane layer again in the subsequent operation.No. the 08/197th, 141, U.S. Patent application has been done further discussion to this class transfer printing layer, now quotes at this with for referencial use.The preferred materials of transfer printing layer can be chosen from following material: polyimides (polyimide) class, epoxides, esters of acrylic acid, methyl acrylic ester, ethene ethers and unsaturated polyester (UP) class.
Fig. 2 shows a kind of method of the present invention, in the method, transfer printing layer 14 is applied on the collection cylinder, forms the pattern that protrudes then on transfer printing layer.Can on transfer printing layer 14, form with various technology and protrude pattern, for example, in Fig. 2, when transfer printing layer 14 is in deformable state, with gravure cylinder 18 (not having printing ink on it) the contact transfer printing layer 14 that has pattern.Have on the gravure cylinder 18 of pattern and have the matrix pattern 20 corresponding with required black matrix pattern.As a result, the deformable transfer printing layer 14 of patterned gravure cylinder 18 contacts, and formation and required black matrix pattern 10 corresponding protrusion patterns 22.Transfer printing layer 14 is fully hardened, with the mold pressing pattern that keeps obtaining from cylinder 18.This can be by using thermoplastic inks and cool off transfer printing layer so that ink solidification is realized when contacting with cylinder 18.Another kind method also is a kind of preferred methods, is to use radiant drying type printing ink, and sends ray in embossing operating period from uviol lamp 34a, sees through cylinder 16, makes transfer printing layer 14 dryings.Then, black matrix" printing ink is applied on the pattern 22 of protrusion, to form the black matrix pattern 10 that protrudes.In the embodiment shown in Figure 2, black matrix" printing ink applies cylinder 30 and black matrix" printing ink 28 is applied on the pattern 22 of protrusion, to form the black matrix" Figure 10 that protrudes.
Another kind method is in the process of making LCD panel, black matrix" printing ink 28 to be applied on the different positions.For example, black matrix" printing ink can be applied on another piece (TFT) glass chip.If desired, black matrix pattern can be deposited on thin film transistor (TFT) above.In the time of on black matrix pattern being deposited to TFT sheet base, aim at black matrix pattern for separate red, green and blue cellular and with it, key is to form the pattern 22 that protrudes on transfer printing layer 14.Black matrix pattern 10 is aimed at the pattern 22 that protrudes, caused when overlooking the LCD of making, colored cellular will appear in the black matrix pattern.
Then, the red, green and blue color ink cellular that constitutes the color filter pattern remainder is deposited on transfer printing layer 14 and protrudes pattern 22 formed recess.With assembly whole be transferred to glass chip on of single deposition step with transfer printing layer 14, black matrix pattern 10 and red, green and blue look cellular formation.
Fig. 3 shows a preferred embodiment, in this embodiment, the black matrix" ink deposition in the matrix pattern 20 of gravure cylinder 18, is made printing ink in matrix pattern 20 inner dryings or sclerosis then, thereby makes printing ink leave the shape of matrix pattern 20.Then, printing ink is transferred on the transfer printing layer 14.In a preferred embodiment, form black matrix pattern with radiant drying type printing ink, and before transfer printing layer 14 transfer printings or simultaneously, by with the dry printing ink of ray printing ink being hardened.Transparent transfer printing layer 14 is positioned on the collection cylinder 16.Such as will be further discussed, available printing ink type is executed the inking roller tube and is applied transfer printing layer 14.Transfer printing layer 14 can be partly solidified before accepting black matrix pattern.But transfer printing layer 14 is fluid preferably before the contact black matrix pattern, and dry during transfer printing layer 14 transfer printings at black matrix pattern.But utilize ultraviolet ray drying type material to form transfer printing layer 14, and, just can realize this drying in that black matrix pattern 10 is carried out radiation by uviol lamp 34a to transfer printing layer 14 between transfer printing layer 14 depositional stages.Uviol lamp 34a is contained in the inside of cylinder 16, and it is made with seeing through ultraviolet material, can penetrate ray.Should be noted that used ray not necessarily must be ultraviolet ray, the light trigger used according to transfer printing layer can also be visible light, infrared ray or other rays,
With method shown in Figure 3, uniformity and accuracy have been produced than the previous much better black matrix pattern of imagining, for convenience of explanation, Figure 1A shows the sectional view of some grids, and they are that the existing ink printing method of usefulness is deposited on the typical black matrix pattern 10 on the glass chip 12.Shown in Figure 1A, in this class existing processes process, owing to the influence of surface tension to printing ink, printing ink can deform, and forms circular or leg-of-mutton cross sectional shape.In some cases, these circular or leg-of-mutton straight lines can become even worse in time, and meticulous straight line begins to be cleaved into point, thereby further lose definition.In some cases, because the printing ink dehumidification on transfer printing (offset printing) surface or the glass chip causes straight line to become discontinuous.In addition, because capillary influence, printing ink can shift in the junction or the vicissitudinous place of pattern area of black matrix" grid lines.Also have, the thickness of this black matrix" so that its optical density (OD) can become inhomogeneous.
Figure 1B shows the black matrix pattern 10 that forms with method shown in Figure 3 on transfer printing layer 14.Method of the present invention allows black matrix" printing ink accurately to duplicate and keep the shape of matrix pattern 20.Thus, as shown in Figure 3, only have square edge for the grid of black matrix pattern.Therefore, when the user overlooks the black matrix pattern that the present invention finishes (direction along arrow A institute first finger is seen), he will only see 90 degree angles (if this is selected design) of sharp outline and the grid that thickness has uniform optical density uniformly between grid.As will be further discussed, the colored ink cellular is deposited in the recess 11 of black matrix pattern 10 formation.
Equipment class among Fig. 3 is similar to equipment shown in Figure 2.But, existing with the ink logo making cylinder of gravure cylinder 18 as black matrix".Have the printing ink of acceptance matrix pattern 20 on the gravure cylinder 18 among Fig. 3, it is can be dry, hot wax (thermal wax) or be the black matrix" printing ink 28 of base with the solvent that it can accept radiation.In a preferred embodiment, printing ink applies cylinder 30 radiant drying type black matrix" printing ink 28 is added in the matrix pattern 20.With doctor 32 unnecessary printing ink is removed from pattern.Then,, make printing ink, thereby form the black matrix pattern 10 of the shape that keeps matrix pattern 20 at least substantially in matrix pattern 20 inner dryings or curing for example by exposing under the ultraviolet ray of sending at uviol lamp 34.Another kind method is, in a preferred embodiment, gravure cylinder 18 be made by the material that can see through ray, and wherein uviol lamp is housed, and in the time of when printing ink is stayed matrix pattern 20 in, uviol lamp makes black matrix" ink setting or part drying.Black matrix" printing ink dry or solidify can also be in black matrix" printing ink and generation when transfer printing layer contacts.For example, the dry black matrix" printing ink of the ray that can send with uviol lamp 34a.When finishing black matrix" ink setting or sclerosis, black matrix" is fully hardened, cause, printing ink keeps substantially, preferably keeps the true shape of matrix pattern 20 fully.Then, make black matrix pattern print cylinder 18 and contact with transfer printing layer 14, with dry or harden after black matrix pattern 10 be transferred to transfer printing layer 14 on the collection cylinder 16 from the matrix pattern 20 on the pattern printing cylinder on.This forms black matrix pattern on transfer printing layer 14, pattern is similar to Figure 1B.Transfer printing layer is preferably smooth, and is preferably in and accepts to be before the black matrix" printing ink fluid.It is more lax that intaglio plate printing image surface ratio is collected the surface, and this point is very important.Generally, the printing ink in the intaglio plate has negative meniscus, and the ink pellet surface in the matrix intaglio pattern is bent downwardly, and is lower than the surface of forme.Therefore, the transfer printing layer flexibility must be enough to contact and adhere black matrix" printing ink with viscosity, and makes printing ink break away from the groove of intaglio printing pattern.
Utilize embodiment shown in Figure 3, promptly when being in the matrix pattern of gravure cylinder 18, black matrix pattern just makes its drying, then the resolution ratio of black matrix pattern depends on 20 degree of depth of matrix pattern and shape, and gives black matrix pattern 10 with the quality of this shape.Make its curing or drying, black matrix pattern will obtain the matrix pattern of edge and corner pros by in black matrix pattern 10 still is contained in matrix pattern 20 time.Thereby it is typically irregular in the conventional ink printing technology that process of the present invention has been avoided, leg-of-mutton or circular corner and edge.
Should be noted that technical process shown in Figure 3 can substitute transfer printing layer type-approval process shown in Figure 2, perhaps increases the transfer printing layer type-approval process.Thus, if desired, available first cylinder 18 forms a pattern that protrudes on transfer printing layer 14, utilizes the dry black matrix pattern that protrudes of second tin roller 18 deposition one deck on protrude pattern 22 then.
Finishing of colour filter will comprise the formation color pixel.Each color pixel generally is made of red, green and blue dice pixel (subpixel is also referred to as colored cellular herein).In all the foregoing descriptions, after protruding a pattern 10 (or protruding black matrix pattern 10) and being added on the transfer printing layer 14, the red, green and blue look cellular of color filter pattern is added to is on the transfer printing layer 14 that protrudes in the recess that pattern 10 forms.The most handy letterpress ink printing technology is deposited on red, green and blue look cellular in the black matrix pattern 10.After being deposited on red, green and blue color ink cellular in the protrusion pattern 10, with whole being transferred on the glass chip 12 of assembly of transfer printing layer 14, protrusion pattern 10 and red, green and blue look cellular 36 formations.
Fig. 4 shows the transfer printing to glass chip 12 of black matrix pattern 10, color filter pattern 36 and transfer printing layer 14.Assembly shown in Fig. 4 comprises black matrix pattern 10 and the color filter pattern 36 that forms with method shown in Figure 3.To between sheet base depositional stage, the printing ink cellular 36 that comprises red, green and blue look cellular preferably is in fluid or is in deformable state at assembly.Thus, between depositional stage, the printing ink cellular is squeezed between transfer printing layer 14 and the glass chip 12, to become shape more smooth thereby make it distortion, the more uniform ink dot of thickness.Carry out drying when being preferably in transfer operation, to keep this more uniform shape and thickness.Dry can the realization by the ray that sees through glass chip that uviol lamp 34d sends.Be preferably in during the electroless copper deposition operation, the printing ink cellular deforms, and fills up the formed space of grid of black matrix pattern fully.In such deformation process, the printing ink cellular can overflow black matrix pattern 10 slightly.This overflowing generally allows.
Fig. 5 shows the preferred embodiment that is used to finish above-mentioned relevant Fig. 3 method.Equipment among Fig. 5 comprises that transfer printing layer applies cylinder 42, and it was added to the quite uniform transparent transfer printing layer 14 of thickness on the collection cylinder 16 before accepting the multicolour ink logo.
After forming transfer printing layer 14, the black matrix pattern that protrudes is deposited on the transfer printing layer 14 from black matrix" printing image cylinder 18.Have the matrix pattern 20 corresponding on the black matrix" printing image cylinder 18 with required black matrix pattern.Matrix pattern 20 is accepted black matrix" printing ink from black matrix" dabber 30.With doctor 32 unnecessary printing ink is disposed from matrix pattern 20, so that in matrix pattern 20, provide thickness uniform printing ink.Then, when black matrix" printing ink still is contained in the matrix pattern 20 of black matrix" printing image cylinder 18, make its part dry or solidify at least.This can be by finishing at dry black matrix pattern 10 before transfer printing layer 14 transfer printings or simultaneously.For example, in one embodiment, black matrix" printing image cylinder 18 is be made by the material that can see through ray, and black matrix" printing image cylinder 18 in ultraviolet source 34c of installation, sending ultraviolet ray, thereby make the black matrix pattern drying.Another kind method is as shown in Figure 5, ultraviolet source 49 can be installed, on the cylinder 18 that ultraviolet ray is transmitted into black matrix pattern.After disposing unnecessary black matrix" printing ink with doctor 32, ultraviolet source 49 is mapped to ray on the printing ink, just makes its drying when black matrix pattern is printed in the matrix pattern of cylinder 18 thereby still stay when black matrix" ink logo 10.Another kind method is, by suitable heat of cooling wax prescription, make solvent-based ink dry or be used in combination these drying mechanisms and come cured printing ink.
Then, the black matrix pattern 10 with drying is transferred on the transfer printing layer 14 from black matrix" printing image cylinder 20.Before the deposition black matrix pattern, transfer printing layer 14 is fluid preferably, closely contacts with matrix printing ink guaranteeing.If part is dry in advance, then transfer printing layer preferably should have enough viscosity, so that black matrix pattern contact and disengaging gravure cylinder 18.When contacting with black matrix pattern 10, preferably make transfer printing layer 14 dry or sclerosis, make it have enough rigidity, thereby keep shape substantially, and can take off black matrix pattern 10 from cylinder 18.This drying can be by designing transparent collection cylinder 16 and sending ray by the uviol lamp 34a that is positioned at collection cylinder 16 and realize.The ray that uviol lamp 34a sends makes transfer printing layer 14 dryings.When after forming black matrix pattern on the transfer printing layer 14, the red, green and blue look cellular pattern that constitutes the color filter pattern remainder is deposited on the transfer printing layer 14.Below will describe how red, green and blue look cellular is deposited on the transfer printing layer 14 in the formed recess 11 of black matrix" Figure 10, they are all supported by collection cylinder 16.
In the equipment of Fig. 5, apply red, green and blue color point pattern with single image impressing pattern cylinder 50 with a plurality of printed patterns.In fact, pattern cylinder 50 can be the cylinder of Any shape, and it can print the ink logo or the image of printings such as comprising lithographic plate, relief printing plate and anhydrous lithographic plate.Pattern cylinder 50 is the letterpress cylinder of flexographic plate or other types preferably.In addition, can be with relief printing block rather than with cylinder transfer printing color.
In Fig. 5, pattern cylinder 50 is relief printing plate cylinders, and three regional 52a, 52b and 52c with printing ink accepted of relief pattern are arranged on it, and printing ink can be accepted in these zones, to form blue, green and red ink pattern respectively.Dabber 54 is applied to painted correct printing ink the pattern cylinder 50 in each district of three printing ink region of acceptance 52a, 52b and 52c from printing ink metering drum (ink metering roll) 56.Dabber 54 can shift near and away and pattern cylinder 50 contacted positions, can make every kind of coloring printing ink only be applied to suitable printing ink region of acceptance.
In Fig. 5, transfer printing layer applies on the acceptance surface 58B that cylinder 42 just depositing to transfer printing layer 14 collection cylinder 16, and black matrix" applies cylinder 18 and just the black matrix pattern 10 that drying is protruded deposited on the transfer printing layer 14.Then, red ink pattern area 52c will deposit to the color dot pattern of redness on the acceptance surface 58B of collection cylinder 16, and green ink pattern area 52b will deposit to the green tint dot pattern on the surperficial 58A of acceptance.In the rotary course next time of collection cylinder 16, blue ink pattern area 52a will deposit to the blue color dot pattern and accept on the surperficial 58B, and red ink pattern area 52c will deposit to the color dot pattern of redness on the surperficial 58A of acceptance.In the rotary course next time of cylinder 16, green ink pattern area 52b will deposit to the green tint dot pattern and accept on the surperficial 58B, and blue ink pattern area 52a will deposit to the blue color dot pattern on the surperficial 58A of acceptance.At this moment, will present the colour filter image of finishing, every kind of painted printing ink all is deposited in the black matrix pattern of protrusion, and all these is positioned on the transfer printing layer 14, and transfer printing layer is supported by the acceptance surface 58b of collection cylinder 16.Checking station 60 places, check the colour filter image, for example can use the check system of graphical analysis or laser scans and so on.If colourful pattern fails inspection, then for defective and pattern is washed from grid 58B with washing barrel 64.If colourful pattern, then makes the glass chip 12 that is carried on the vacuum cup 62 and collection cylinder 16 by checking and the assembly that is made of transfer printing layer 14, black matrix pattern 10 and red, green and blue look cellular contacts, assembly is transferred on the sheet base.
The transfer printing of colorful ink logo is preferably in colorful image and still carries out during deformable.As shown in Figure 4, in this way, during transfer printing, printing ink is squeezed between transfer printing layer 14 and the sheet base 12.In a preferred embodiment, the used printing ink of colored ink cellular is radiant drying, and vacuum cup 62 is made by transparent material, and a uviol lamp 63 is installed in the vacuum cup 62, to send ray, penetrates sheet base 12.Printing ink is dried when being subjected to the extruding of transfer printing electroless copper deposition operation generation, thereby makes the printing ink cellular keep the more uniform shape that produces during the transfer operation.
The LCD color array alignment request generally is about positive and negative 30 micron number magnitudes, requirement in the future approximately wishes to be positive and negative 5 microns.Because these are high to alignment request, similar Fig. 5 forms various multicolour patterns with single pattern cylinder 50 like this and is of great use with its printing machine that is deposited on the single collection cylinder 16.At first, owing to include only two cylinders, promptly pattern cylinder 50 is to collection cylinder 16 transfer printings, and the mechanical part of required aligning is less.
By each pattern 52a, 52b and 52c are placed on the pattern cylinder 50 exactly, can further be convenient to aim at the location, work as collection cylinder 16 and pattern cylinder 50 so accurately on time, each pattern is located automatically when depositing to its ink logo separately on the collection cylinder 16 and is aimed at.Thus, opposite with the existing method of using a plurality of pattern cylinders, this method only need be aimed at a pattern cylinder.In case when the printing ink that all are painted all deposits on the transfer printing layer 14, as shown in Figure 4, whole colorful image is transferred on the sheet base 12 from collection cylinder 16 by primary transfer.
In addition, in the embodiment shown in fig. 5,16 use 3: 2 image transfer printing ratio from pattern cylinder 50 to collection cylinder.The transfer printing ratio is the ratio of accepting pattern numbers on colourful pattern number and the collection cylinder 16 on the pattern cylinder 50.16 use the benefit of 3: 2 picture pattern transfer printing ratios to be from pattern cylinder 50 to collection cylinder, this than regular meeting make a plurality of images from a cylinder continuously transfer printing to another cylinder, cause each rotation collection cylinder 16, each ink area 52 can both be met with different acceptance section 58 on the collection cylinder.This causes one from transposition (self-indexing) technical process, promptly once enter in the production process of running, and between all printing units, obtain accurate the aligning, under the operator scheme of surface speed matched, can make pattern cylinder 50 and collection cylinder 16 remain on its position separately.Should help to keep the accurate location of aiming at from the transposition operational characteristic.
In addition, with the single transfer step colorful ink logo is transferred on the sheet base 12.In this way, for once the location is aimed between collection cylinder and sheet base, and this is to deposit on the sheet base colorful ink logo and black matrix" needed.These are different with existing method, and existing method generally is deposited on color filter pattern on the sheet base with three different depositions, and therefore existing method need independently be located for three times with sheet base work and be aimed at.
In a preferable apparatus embodiments that realizes the inventive method, equipment shown in Figure 5 is installed in a side (the promptly vertical printing cylinder of installing).By vertical installation printing cylinder, they can be vertically, and (cylinder vertically relatively) pulled down from printing equipment, and lays in traditional level under the situation of cylinder, must move horizontally cylinder.
By can overcome many intrinsic shortcomings in the existing printing equipment in end portion supports printing cylinder method shown in Figure 5.At first, if desired, availablely be positioned at single under each printing cylinder but not two (being one at every end place) support system supporting printing cylinders.Because the other end of each printing cylinder (i.e. upper end) is freely, thus can move in the vertical direction cylinder, to dismantle and to change these printing cylinders.Thus, greatly facilitate the replacing of printing cylinder.
Make the dry embodiment of printing ink (black matrix" and/or colored ink) for those, preferably ink formulation being become can be dry by radiation.What is called can be dry, means that printing ink is crosslinked.Radiation can be dry, means printing ink to be crosslinked under suitable x ray exposure x.Whether this and printing ink also have the hot melt thermoplastic energy under the state of not dry (uncrosslinked), or it is irrelevant to comprise a kind of solvent.In the embodiment shown in fig. 5, vacuum cup 62 can send ray, and this ray is suitable for dry used specialty inks.For example, a ultraviolet ray (160-400 μ m) or visible light (400-700 μ m) radiation source are housed in the vacuum cup 62, thereby can send the ray of ultraviolet ray or visible light.On the other hand, available additive method exposes printing ink under ray, for example with a radiation source aligns with drum and the formed nip of sheet base.Though this drying can be finished with common irradiation lamp radiant drying, also can use laser instrument,, make printing ink fully dry (crosslinked) through the speculum guiding.Can make ink dot dry under the state after the distortion by collection cylinder 16 on depositing to the sheet base time, under certain specific drum rotation speed, the surface area of contact-making surface must be enough big between collection cylinder and sheet base, so that an amount of ink setting is just arranged when ink dot still is in state of applanation.This contact-making surface is called " pin ", is at general about 5 to the 25 millimeters contact-making surface of width on glass.
Colour filter generally requires the width of black matrix" line to be approximately the 15-25 micron, and requires the width of colored little cellular generally to be about 70-100 micron number magnitude, and length is the 200-300 micron.Colored cellular generally is printed on thickness less than about 10 microns and preferably less than on 5 microns the film.These tiny colored cellulars must be printed additional equably and accurately be aimed at and are positioned in the black matrix pattern.In implementing process of the present invention, generally be ready to use conventional radiant drying type printing ink but not thermoplastic inks, some reasons are that they can print under lower viscosity, this helps to print this tiny cellular.In addition, because hot melt thermoplastic printing ink needs extremely strict calorifics tolerance limit to control pattern dimension, so the aligning of more difficult its pattern of control.In addition, be easy to during the extruding transfer operation, make radiant drying type ink setting according to the present invention.Thermoplastic inks has an advantage at least, fixing immediately in the time of they can being mixed with on being deposited on sheet base with lower temperature or transfer platen, pin hole is reduced, and the film inhomogeneities lowers, and reduces other because of the improper defective that produces of transfer surface humidity.Therefore, but the printing ink of preferred type is a kind of printing ink that has thermoplasticity and radiation drying property simultaneously.This printing ink be configured and have thermoplasticity on being printed to the sheet base time till.At this moment it is by suitably exposing and drying under the ray.Drying means that printing ink is crosslinked in some degree.Printing ink crosslinked improved its endurance and resistance to higher temperature, and this ensuing treatment step of temperature will bear in to(for) colour filter is favourable.
For black matrix" printing ink, the printing ink of another kind of preferred type is a kind of solvent-based formulas, in this prescription, printing ink contains volatile solvent, can during last China ink and wiping, lower viscosity, choice of Solvent should make it compatible with printing ink, and with the black matrix" that is easy to thin (preferably 2-5 micron) on the gravure before transfer printing layer contacts in evaporate.This printing ink carries out crosslinked then during ensuing radiation or heat cure.
In the time of on depositing to the sheet base or afterwards, printing ink carries out last curing, to reach hard noncohesive durable state by exposing to the open air in radiation, hot-fluid, moisture or other types are solidified and handled.
Although for convenience of explanation, describe the present invention in detail, should be appreciated that this description just for illustrative purposes, and those skilled in the art's the spirit and scope of the present invention of not breaking away from following claim and being limited, can carry out various variations.
For example, in embodiment illustrated herein, be that transfer printing layer 14 is added on the collection cylinder 16.But the present invention is not limited to collection cylinder, therefore can also use the collecting device such as other types such as plates.Equally, although described herein embodiment uses the pattern cylinder, when the pattern plate that also can use flat pattern.Can apply transfer printing layer 14 with any technology, apply but the most handy printing ink applies technology.In addition, the another kind of methods different with process shown in Figure 5 are to print version by each pattern cylinder 54 or flat pattern pattern three groups of colored cellulars are directly printed onto on the collection cylinder 16.In this another structure, there is not pattern cylinder 50.
In addition, in described most of embodiment, black matrix pattern is deposited on the colour filter sheet base.But,, black matrix pattern 10 can be deposited on the positions different in the LCD panel as above-mentioned described with reference to Fig. 2.For example black matrix pattern can be deposited on the glass chip that is loaded with thin film transistor (TFT).Therefore, in the embodiment shown in fig. 5, available collection cylinder 16 is directly accepted black matrix" printing ink from black matrix" printing ink gravure cylinder 18.Then, with the direct transfer printing of this printing ink and deposit on the TFT glass chip.Preferably with routine techniques the TFT film is applied on the glass chip, thereby the black matrix pattern deposition is covered on the TFT film.Then, preferably, black matrix" printing ink is suitably aimed at the color filter pattern on being deposited on another sheet glass sheet base as above-mentioned described with reference to Fig. 2.
Claims (22)
1. method of making colour filter is characterized in that it comprises:
One transfer printing layer is provided;
On described transfer printing layer, form a convex surface pattern and a concave surface pattern;
A plurality of colored ink patterns are deposited on the described transfer printing layer, and wherein said ink logo is positioned at described concave surface pattern, thereby forms color filter pattern/transfer printing layer assembly; And
Described assembly is transferred on the sheet base, thereby ink logo is contacted with the sheet base.
2. the method for claim 1 is characterized in that, described formation step comprises that described transfer printing layer is put with an indentation salient mounting to be contacted, thereby forms described convex surface pattern and described concave surface pattern on described transfer printing layer.
3. method as claimed in claim 2 is characterized in that, described indentation salient mounting is put and comprised a pattern cylinder or a pattern plate.
4. method as claimed in claim 3 is characterized in that, during described contact procedure, also comprises making described transfer printing layer drying.
5. method as claimed in claim 3 is characterized in that, also is included in before the described deposition step, black matrix" printing ink is added on the described convex surface pattern, thereby forms a black matrix pattern that protrudes on described transfer printing layer.
6. the method for claim 1 is characterized in that, described convex surface pattern is corresponding with required black matrix pattern.
7. the method for claim 1 is characterized in that, described formation step comprises:
One matrix pattern is provided;
Ink deposition is arrived in the described matrix pattern; And
With described printing ink from described matrix pattern transfer to described transfer printing layer, thereby the black matrix pattern that on described transfer printing layer, form to protrude.
8. method as claimed in claim 7 is characterized in that, is included in to make described printing ink partially hardened at least before the described printing ink step of described transfer printing, causes after the described printing ink step of described transfer printing described printing ink can keep the shape of matrix pattern substantially.
9. method as claimed in claim 8 is characterized in that, described cure step comprises by exposure under ultraviolet ray makes described ink setting.
10. method as claimed in claim 9 is characterized in that, makes described transfer printing layer drying during the described printing ink step of described transfer printing.
11. method as claimed in claim 8 is characterized in that, before the described pattern of described transfer printing, makes described transfer printing layer part dry at least.
12. method as claimed in claim 11 is characterized in that, described transfer printing layer has enough viscosity after by the part drying, described black matrix" printing ink can be peeled off from described matrix pattern.
13. the method for claim 1 is characterized in that, during the described transfer printing of described assembly, described painted ink logo is deformable; And described method also comprises:
Make the distortion of described ink logo, form thickness than described transfer printing before more uniform film.
14. method as claimed in claim 13 is characterized in that, during the described transfer printing of described assembly, and dry described each painted ink logo.
15. the method for claim 1, it is characterized in that, described transfer printing layer is chosen from following material: acrylic compounds polyimide, epoxides, acrylic compounds, ethene ethers, polyurethanes, polyesters and propylene acidifying or the metering system acidifying, ester class, urethanes class or epoxides.
16. method as claimed in claim 15 is characterized in that, described transfer printing layer is a radiant drying section bar material, and described transfer printing layer at x ray exposure x down to the small part drying.
17. method as claimed in claim 6 is characterized in that, also comprises another position that black matrix pattern is added to LCD panel.
18. method as claimed in claim 17 is characterized in that, described another position is on the ITO layer.
19. an equipment that is used for printing color-filter is characterized in that, comprising:
Collection cylinder is used to receive transfer printing layer/color filter pattern assembly, and described assembly is transferred on the sheet base;
The transfer printing layer bringing device is used for described transfer printing layer is added to described gathering-device;
Black matrix pattern is printed cylinder, and it comprises corresponding matrix pattern with black matrix pattern, is used to contact the described transfer printing layer on the described collection cylinder; And
At least one colored dabber is used for painted printing ink is added to described transfer printing layer, to form described color filter pattern/transfer printing layer assembly.
20. equipment as claimed in claim 19 is characterized in that, also comprises printing ink is added to the black matrix" printing ink bringing device of described matrix pattern and the device of the interior described black matrix" printing ink of described matrix pattern that is used to harden.
21. equipment as claimed in claim 19, it is characterized in that described curing system comprises that described black matrix" printing ink applies cylinder, described black matrix" printing ink applies the surface that cylinder comprises radioparent, and in a radiation source is housed, can be used for dry described black matrix" printing ink.
22. equipment as claimed in claim 20, it is characterized in that described collection cylinder comprises the surface of radioparent, and in a radiation source is housed, described black matrix" printing ink from described matrix pattern during described collection cylinder transfer printing, can be used for dry described transfer printing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95191413 CN1153496A (en) | 1994-10-17 | 1995-10-04 | Apparatus and method for printing color-filter |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/324,345 | 1994-10-17 | ||
| CN 95191413 CN1153496A (en) | 1994-10-17 | 1995-10-04 | Apparatus and method for printing color-filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153496A true CN1153496A (en) | 1997-07-02 |
Family
ID=5082521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95191413 Pending CN1153496A (en) | 1994-10-17 | 1995-10-04 | Apparatus and method for printing color-filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153496A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390574C (en) * | 2003-04-18 | 2008-05-28 | 富士胶片株式会社 | Shielding film for display device |
| CN100392437C (en) * | 2003-04-18 | 2008-06-04 | 富士胶片株式会社 | Light-shielding layer for display device |
| CN100399145C (en) * | 2003-12-18 | 2008-07-02 | Lg.菲利浦Lcd株式会社 | Method for fabricating color filter array substrate |
| CN100424561C (en) * | 2004-12-10 | 2008-10-08 | 信利半导体有限公司 | Method for making colored display unit |
| WO2013166752A1 (en) * | 2012-05-11 | 2013-11-14 | 深圳市华星光电技术有限公司 | Color filter and manufacturing method thereof |
-
1995
- 1995-10-04 CN CN 95191413 patent/CN1153496A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390574C (en) * | 2003-04-18 | 2008-05-28 | 富士胶片株式会社 | Shielding film for display device |
| CN100392437C (en) * | 2003-04-18 | 2008-06-04 | 富士胶片株式会社 | Light-shielding layer for display device |
| CN100399145C (en) * | 2003-12-18 | 2008-07-02 | Lg.菲利浦Lcd株式会社 | Method for fabricating color filter array substrate |
| CN100424561C (en) * | 2004-12-10 | 2008-10-08 | 信利半导体有限公司 | Method for making colored display unit |
| WO2013166752A1 (en) * | 2012-05-11 | 2013-11-14 | 深圳市华星光电技术有限公司 | Color filter and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5514503A (en) | Apparatus and method for printing a color filter | |
| US5624775A (en) | Apparatus and method for printing a color filter | |
| US6001515A (en) | Method for printing a color filter | |
| CN1141020A (en) | Color filter and method of printing | |
| US5678483A (en) | Method for printing a black border for a color filter | |
| US5701815A (en) | Method of printing a color filter | |
| CN1167530A (en) | Method and apparatus for forming a contoured planarizing layer for a color filter | |
| CN101041306A (en) | Color filter printing method, color filter printing apparatus, and color filter substrate | |
| US5752442A (en) | Method for printing a color filter | |
| JP4166117B2 (en) | Method for manufacturing color filter of liquid crystal display element | |
| US9867289B2 (en) | Filled large-format imprinting method | |
| CN1153496A (en) | Apparatus and method for printing color-filter | |
| KR100764591B1 (en) | Color Filter Panel for Liquid Crystal Display Device using Thermal Imaging and Method of Fabricating the same | |
| CN100529875C (en) | Method of manufacturing color filter | |
| US20060121370A1 (en) | Color filter substrate for liquid crystal display device and method of fabricating the same | |
| CN100460951C (en) | Color filter substrate for liquid crystal display device and method of fabricating the same | |
| KR20040050770A (en) | method of color filter panel for liquid crystal display | |
| KR20050003248A (en) | Color film transfer equipment and method of color filter panel using it for liquid crystal display | |
| JPH08118777A (en) | Method for and apparatus of printing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1048218 Country of ref document: HK |