CN1292301C - Liquid crystal display device with homogeneous shared voltage and producing method thereof - Google Patents
Liquid crystal display device with homogeneous shared voltage and producing method thereof Download PDFInfo
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- CN1292301C CN1292301C CN 03131267 CN03131267A CN1292301C CN 1292301 C CN1292301 C CN 1292301C CN 03131267 CN03131267 CN 03131267 CN 03131267 A CN03131267 A CN 03131267A CN 1292301 C CN1292301 C CN 1292301C
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- infrabasal plate
- upper substrate
- common electrode
- lcd
- photoresist separation
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Abstract
The present invention provides a liquid crystal displayer with homogeneous shared voltage and a manufacturing method thereof so as to provide good picture quality. The manufacturing method comprises the following steps: firstly, a plurality of scan wires, a signal wire, a share electrode conducting wire and a plurality of share electrode pads are made on the surface of a lower base plate, and each share electrode pad is electrically connected with each share electrode conducting wire; then a plurality of photoresist interval objects form on the lower surface of an upper base plate, each photoresist interval object corresponds to each share electrode pad of the lower base plate, and subsequently, conductiong material layers form on the lower surface of the upper base plate so as to cover each photoresist interval object, and then, the upper base plate is combined with the lower base plate, and thus, each conducting material layer which is covered on each photoresist interval object is electrically connected with each share electrode pad corresponding to each photoresist interval object; finally liquid crystal molecules are filled between the two base plates, and the two base plates are sealed.
Description
Technical field
The invention provides a kind of LCD, particularly a kind of LCD and preparation method thereof with homogenising common voltage (commonvoltage).
Background technology
Because LCD has that external form is light, thin, power consumption is few and characteristic such as radiationless pollution, so be widely used on notebook computer (notebook), PDA(Personal Digital Assistant) and the video camera portable type information products such as (video camera), even the trend that replaces the CRT monitor or television gradually arranged.
Existing thin film transistor (TFT) (thin film transistor, TFT) LCD is to utilize (spray) mode of spraying arbitrarily to insert plastic bead (plastic bead), beaded glass or glass fibre mostly, be used for the gap (cell gap) of the liquid crystal layer between the support glass substrate, relatively and the control gap size, to obtain stable display quality.Yet the plastic bead that these are inserted etc. may be positioned at the light penetrating region, or present uneven distribution, cause the situation of gathering to take place, and make light through scatterings such as plastic beads, reduce TFT-LCD light to specific strength, or produce white point (white point) defective, have a strong impact on display quality and product percent of pass.Therefore developed at present and utilized the formed photoresist separation material of developing process (photospacer) to replace existing plastic bead etc.,, and kept good gap length, improved picture quality with the size and the position of accurate control gap thing.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the basic framework figure of an existing display panels 10, and Fig. 2 is the cross-sectional view of Fig. 1 display panels 10.As shown in Figure 1, display panels 10 can be distinguished into a viewing area 12 and and be looped around 14 liang of zones of non-display area on every side, viewing area 12.Include a PEL matrix (including a plurality of pixels 20) that is staggered to form by multirow signal wire (data line) 16 and multiple row sweep trace (scan line) 18 in the viewing area 12, and by a plurality of thin film transistor (TFT)s (thinfilm transistor, TFT), the pixel drive circuit that constituted of electronic component (not being presented among Fig. 1) such as electric capacity, it is set at the confluce of each row signal line 16 and each column scan line 18.Non-display area 14 is used for being provided with packaging and testing material and signal transmission line, comprises structures such as peripheral circuit element, patch cord, coil type packaging body 26, and a plurality of silver paste points that are evenly distributed on non-display area 14.Say from structure, display panels 10 comprise an infrabasal plate 22, a upper substrate 24 and be filled in infrabasal plate 22 and upper substrate 24 between a plurality of liquid crystal molecule (not shown)s.The uper side surface of infrabasal plate 22 includes signal wire 16, sweep trace 18, a plurality of coil type packaging body 26 and a plurality of thin film transistor (TFT) (not shown) that is positioned at non-display area 14.Wherein, signal wire 16 and sweep trace 18 are electrically connected on its corresponding this coil type packaging body 26 respectively, to be used for outputing signal on the infrabasal plate 22, thereby make display panels 10 display frames, and thin film transistor (TFT) is arranged on the confluce of every signal line 16 and every sweep trace 18 respectively, as the on-off element of pixel.Infrabasal plate 22 contains in addition by the formed a plurality of pixel capacitors of a transparent conductive material layer (pixel electrode) 28, be electrically connected on each thin film transistor (TFT), and one deck alignment film 30, cover thin film transistor (TFT) and pixel capacitors 28 surfaces, be used for controlling the orientation of liquid crystal molecule.
As shown in Figure 2, the downside surface of upper substrate 24 is provided with the transparent conductive material layer of a plurality of black-matrix layer (blackmatrix) 32, colored filter (color filter) 34, one comparative electrode as display panels 10 (counter electrode) 36, and a plurality of photoresist separation material 38.Colored filter 34 comprises three kinds of Red lightscreening plate 34a, green color filter 34b and blue color filter 34c, and the colored filter 34 of per three kinds of colors is one group, constitutes a pixel 20.Black-matrix layer 32 is arranged between each colored filter 34 intersection with upper substrate 24.Comparative electrode 36 complete colored filter 34 surfaces that cover are to provide display required voltage of when work.Photoresist separation material 38 is transparent or opaque small columns, be used for replacing plastic bead, design according to different vendor, the distribution density of photoresist separation material 38 can be different, generally be size with the gap that can support liquid crystal layer and control gap as major consideration, photoresist separation material 38 is evenly distributed among the whole liquid crystal display panel 10.The technology of available liquid crystal display 10 is behind the downside surface deposition comparative electrode 36 of upper substrate 24, makes photoresist separation material 38 on the surface of comparative electrode 36 in the mode of exposure imaging again.In addition, the downside surface of upper substrate 24 also can include an alignment film (not shown), covers the surface of comparative electrode 36.
The type of drive of available liquid crystal display 10 is to provide a stable common voltage value by comparative electrode 36, utilize coil type packaging body 26 communicated data signals on non-display area 14 to give signal wire 16 simultaneously, and by the TFT 28 in each pixel 20, provide a pixel voltage to each pixel capacitors 28 respectively according to this data-signal again, utilize this common voltage and the formed electric field of this pixel voltage that the liquid crystal molecule in its pixel is turned at last, and make light can penetrate liquid crystal material layer.Liquid crystal molecule has turning in various degree according to the different electric field intensity of each pixel, and influences the total amount that light penetrates in each pixel, thus the display quality of decision LCD 10.Therefore a stable pixel voltage or a common voltage value is that LCD 10 can effectively present one of key of complete picture.
In the prior art, the method that common voltage is provided is to be connected to infrabasal plate 22 by circuit earlier, is passed on the comparative electrode 36 of upper substrate 24 via silver paste points again, makes whole LCD 10 have an identical common voltage value.Yet the constituent material of employed comparative electrode 36 generally is tin indium oxide (indium tin oxide in available liquid crystal display 10, ITO), its impedance is very big, be about 90 Ω/, and the silver paste points that is used to conduct magnitude of voltage only be distributed in LCD 10 around, therefore working as common voltage is transmitted on the comparative electrode 36 via silver paste points, and then when being transmitted to the center section of LCD 10 via the marginal portion of comparative electrode 36, can produce pressure drop because the resistance value of the material oxidation indium tin of formation comparative electrode 36 etc. is big, especially when LCD 10 is large area display, the problem of pressure drop can be more serious, cause the common voltage value of upper substrate 24 inhomogeneous, can't correctly control turning to of liquid crystal molecule, cause the optimization that can't reach picture.Therefore providing a kind of LCD with homogenising common voltage and preparation method thereof, so that good picture quality to be provided, is the problem that current industry remains unsolved.
Summary of the invention
Therefore fundamental purpose of the present invention is to provide a kind of LCD with homogenising common voltage and preparation method thereof, influences the problem of display quality because of common voltage is inhomogeneous to solve above-mentioned available liquid crystal display.
The invention provides a kind of method that makes LCD have the homogenising common voltage.One infrabasal plate at first is provided, uper side surface at this infrabasal plate forms multi-strip scanning line and many signal line, each sweep trace and signal wire are intermeshed form a PEL matrix, this PEL matrix comprises a plurality of pixels, form the many common electrode leads (common electrode) that are used to transmit common voltage and a plurality of common electrode pad (pad) then at this infrabasal plate, this common electrode pad is electrically connected with this common electrode lead respectively, one upper substrate is provided simultaneously, downside surface at this upper substrate forms a plurality of photoresist separation materials, make each photoresist separation material correspond respectively to each common electrode pad on the infrabasal plate, form the lower surface of a conductive material layer then at this upper substrate, and cover the surface of described photoresist separation material, make up upper substrate and infrabasal plate then, make both parallel relatively, support the gap of this two substrates with the photoresist separation material of upper substrate surface, and the conductive material layer that covers on each photoresist separation material is electrically connected respectively with pairing each the common electrode pad of each photoresist separation material, filling liquid crystal molecule between two substrates at last, and add at the two substrates opening part and to seal that the impedance of material that wherein forms described common electrode lead is less than the impedance of the material that forms described conductive material layer.This conductive material layer can be a transparent indium tin oxide layer, and this common electrode lead can be formed by aluminium.
Because mainly being elder generation, the present invention forms a plurality of photoresist separation materials at the upper substrate of LCD, and then form a conductive material layer in upper substrate surface, and the conductive material layer that covers on the photoresist separation material directly is electrically connected with the common electrode pad of infrabasal plate, to be electrically connected with electrode cable together again by the common electrode pad, therefore, common voltage just can be directly conducted to the conductive material layer that covers on the photoresist separation material by the common electrode lead on the infrabasal plate, again because the photoresist separation material is to be evenly distributed on whole panel surface, so common voltage that whole conductive material layer can have a homogenising, avoid in the prior art, transmit the supreme substrate conducting material layer of common voltage periphery at non-display area with silver paste points, but cause the common voltage of display panel center section less because the resistance value of conductive material layer is big, the situation of common voltage inequality.
Description of drawings
Fig. 1 is the basic framework figure of an existing display panels.
Fig. 2 is the cross-sectional view of Fig. 1 display panels.
Fig. 3 is the basic framework figure of display panels of the present invention.
Fig. 4 is the cross-sectional view of LCD shown in Figure 3.
Fig. 5 is that the present invention makes LCD have the schematic flow sheet of homogenising common voltage method.
Description of reference numerals
10 display panels, 12 viewing areas
14 non-display areas, 16 signal wires
18 sweep traces, 20 pixels
22 infrabasal plates, 24 upper substrates
26 coil type packaging bodies, 28 pixel capacitors
30 alignment films, 32 black-matrix layer
34 colored filters, 36 comparative electrodes
38 photoresist columns, 50 display panels
52 infrabasal plates, 54 upper substrates
56 viewing areas, 58 non-display areas
60 sweep traces, 62 signal wires
64 pixels, 66 common electrode leads
68 common electrode pads, 70 photoresist columns
72 conductive material layers, 74 colored filters
76 black-matrix layer, 80 alignment films
82 coil type packaging bodies
Embodiment
Please refer to Fig. 3 and Fig. 4, Fig. 3 is the basic framework figure of display panels 50 of the present invention, and Fig. 4 is the cross-sectional view of LCD 50 shown in Figure 3.LCD 50 with homogenising common voltage of the present invention includes an infrabasal plate 52, one upper substrates 54, and it is set in parallel on the infrabasal plate 52, and a plurality of liquid crystal molecule (not shown), and it is filled between infrabasal plate 52 and the upper substrate 54.The infrabasal plate 52 surface definition of display panels 50 of the present invention has a viewing area 56 and a non-display area 58, and the surface of infrabasal plate 52 also include multi-strip scanning line 60, many signal line 62, a plurality of by sweep trace 60 and signal wire 62 viewing area 56 in the crossing pixel 64 that forms, lay respectively at a plurality of thin film transistor (TFT) (not shown)s in each pixel 64, many common electrode leads 66, a plurality of common electrode pad 68 and alignment film (not shown)s.Wherein, the material of common electrode lead 66 and common electrode pad 68 can be the high metal materials of electric conductivity such as aluminium.
As shown in Figure 4, the downside surface of upper substrate 54 includes a plurality of photoresist separation materials 70 and and covers conductive material layer 72 on the photoresist separation material 70.Photoresist separation material 70 is used for supporting the gap of upper substrate 54 and infrabasal plate 52, and be evenly distributed on upper substrate 54 surfaces, for example all can be provided with a photoresist separation material 70 in each pixel 20, and conductive material layer 72 is used as the comparative electrode of display, as effect in the prior art, be used for providing a stable common voltage value, strengthen the effect of liquid crystal molecule rotation in whole upper substrate surface.Wherein, upper substrate 54 also includes a plurality of colored filters 74, a plurality of black-matrix layer 76 and an alignment film (not shown), and colored filter 74 has three kinds of Red lightscreening plate 74a, green color filter 74b and blue color filter 74c, the colored filter 74 of per three kinds of colors is one group, constitute a pixel 64, and black-matrix layer 76 is positioned at the intersection of each colored filter 74 and upper substrate 54, and red to prevent, blue, green three kinds of color colour mixtures also improve the colour developing contrast.In addition, the present invention also includes two Polarizer (not shown)s, is attached to the outer surface of upper substrate 54 and infrabasal plate 52 respectively.
Because each common electrode pad 68 is evenly distributed in the viewing area 56, and each common electrode pad 68 all with altogether is electrically connected with electrode cable 66, and each common electrode pad 68 all has its corresponding photoresist separation material 70, so the conductive material layer 72 that covers on the photoresist separation material 70 just can directly be electrically connected with each photoresist separation material 70 pairing common electrode pad 68, and form conducting with electrode cable 66 together.In addition, by the design of circuit layout, some part of common electrode lead 66 also can directly be used as common electrode pad 68, directly is electrically connected with each common electrode lead 66 so that cover the conductive material layer 72 on photoresist separation material 70 surfaces.
It should be noted that method of the present invention also can be applicable to colorful filter structure directly is produced on glass substrate or the thin film transistor (TFT) (color filter on TFT, technology COT), or in the product of other display panels.
Please refer to Fig. 5, Fig. 5 is that the present invention makes LCD have the schematic flow sheet of the method for homogenising common voltage.One infrabasal plate at first is provided, then the uper side surface at this infrabasal plate forms multi-strip scanning line, many common electrode lead and a plurality of common electrode pads that are used for transmitting common voltage, and this common electrode pad is electrically connected with this common electrode lead respectively, form display panels necessary electronic elements such as many signal line, pixel capacitors lead and thin film transistor (TFT) then, and each signal wire and sweep trace are intermeshed form a plurality of pixels.Then, one upper substrate is provided, downside surface at this upper substrate forms a plurality of photoresist separation materials earlier, and make each photoresist separation material correspond respectively to each common electrode pad on the infrabasal plate, then form a conductive material layer again, and cover each photoresist separation material in this upper substrate surface.Make upper substrate and infrabasal plate parallel relative and made up then, then utilize the photoresist separation material of upper substrate surface to support the gap of this two substrates, and the conductive material layer that covers on each photoresist separation material is electrically connected respectively with pairing each the common electrode pad of each photoresist separation material, filling liquid crystal molecule between two substrates at last, and add at the two substrates opening part and to seal.Wherein, a plurality of colored filters can be formed on upper substrate surface or infrabasal plate surface, in addition, as prior art, LCD of the present invention also includes alignment film and the polar biased direction is differed the technologies such as downside surface that 90 two Polarizers of spending are attached to uper side surface He this infrabasal plate of this upper substrate respectively, this is those skilled in that art knows, so do not add to give unnecessary details at this.
Be compared to the available liquid crystal display, the LCD with homogenising common voltage of the present invention utilizes the common electrode lead on the infrabasal plate to transmit common voltage.Because being formed on the common electrode lead on infrabasal plate surface can be made (in embodiments of the present invention by the less material of impedance, the use impedance is that the aluminium of 3-4 Ω/ is made the common electrode lead), for example with sweep trace gold-tinted etch process (photo-etching-process together, PEP), so common voltage effectively can be passed to the conductive material layer on each photoresist separation material surface, make the common electrode of upper substrate surface have a uniform common voltage, so just can significantly improve the display quality of display, not only do not need significantly to revise existing technology of making LCD, also this technology can be applied in the making of large size panel, improve the qualification rate of product.
The above only is the preferred embodiments of the present invention, and all equalizations that claims are done according to the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (18)
1. method that makes LCD have the homogenising common voltage, this method comprises:
One infrabasal plate is provided, and this definition one viewing area, infrabasal plate surface and a non-display area;
Form multi-strip scanning line, many common electrode leads and a plurality of common electrode pad at the uper side surface of this infrabasal plate, and this common electrode lead is used for transmitting and uses voltage altogether, and this common electrode pad is electrically connected with this common electrode lead respectively;
Uper side surface at this infrabasal plate forms many signal line, and described signal wire and described sweep trace intermesh in this viewing area and form a PEL matrix, and this PEL matrix comprises a plurality of pixels;
One upper substrate is provided;
Downside surface at this upper substrate forms a plurality of photoresist separation materials, and respectively the distributing position of this photoresist separation material corresponds respectively to respectively this common electrode pad of this infrabasal plate;
Form the downside surface of a conductive material layer, and cover the surface of described photoresist separation material at this upper substrate;
Utilize described photoresist separation material to support the gap of this upper substrate and this infrabasal plate, with parallel this upper substrate and this infrabasal plate of relatively making up, and this conductive material layer that covers this photoresist separation material respectively is electrically connected respectively with the pairing described common electrode pad of this photoresist separation material respectively; And
Between this upper substrate and this infrabasal plate, fill a plurality of liquid crystal molecules, and finish sealing of this upper substrate and infrabasal plate,
The impedance of material that wherein forms described common electrode lead is less than the impedance of the material that forms described conductive material layer.
2. method as claimed in claim 1 also comprises the step of a plurality of thin film transistor (TFT)s of formation at the uper side surface of this infrabasal plate, and respectively this thin film transistor (TFT) is arranged on respectively this sweep trace and the respectively confluce of this signal wire respectively, is used as the respectively on-off element of this pixel.
3. method as claimed in claim 2 also comprises the uper side surface of many pixel capacitors leads of formation at this infrabasal plate, to be electrically connected on the respectively step of this thin film transistor (TFT) respectively.
4. the downside surface that method as claimed in claim 1 also is included in this upper substrate forms the step of a plurality of colored filters, and respectively this colored filter all includes redness, green and blue three kinds of optical filters.
5. the uper side surface that method as claimed in claim 1 also is included in this infrabasal plate forms the step of a plurality of colored filters, and respectively this colored filter all includes redness, green and blue three kinds of optical filters.
6. the uper side surface that method as claimed in claim 1 also is included in the downside surface of this infrabasal plate and this upper substrate respectively forms the step of a Polarizer respectively.
7. method as claimed in claim 1, wherein said photoresist separation material are arranged on respectively respectively in this pixel.
8. method as claimed in claim 1, wherein this conductive material layer is a transparent indium tin oxide layer.
9. method as claimed in claim 1, wherein this common electrode lead is formed by aluminium.
10. LCD with homogenising common voltage, it includes:
One infrabasal plate, the uper side surface of this infrabasal plate define a viewing area and a non-display area, and this infrabasal plate includes:
Multi-strip scanning line and many signal line, and described sweep trace and described signal wire intermesh in this viewing area and form a PEL matrix, and this PEL matrix comprises a plurality of pixels;
Many common electrode leads are used for transmitting and use voltage altogether;
A plurality of common electrode pads are electrically connected on respectively this common electrode lead;
One upper substrate is set in parallel on this infrabasal plate, and this upper substrate includes:
A plurality of photoresist separation materials are arranged on the downside surface of this upper substrate, are used for supporting the gap of this upper substrate and this infrabasal plate, and respectively the relative position of this photoresist separation material corresponds respectively to respectively this common electrode pad of this infrabasal plate;
One conductive material layer, be arranged on the downside surface of this upper substrate and be covered in respectively on this photoresist separation material, and this conductive material layer that covers this photoresist separation material respectively is electrically connected with pairing each common electrode pad of this photoresist separation material respectively respectively; And
A plurality of liquid crystal molecules are filled between this upper substrate and the infrabasal plate,
The impedance of material that wherein forms described common electrode lead is less than the impedance of the material that forms described conductive material layer.
11. as the LCD of claim 10, wherein this infrabasal plate also includes a plurality of thin film transistor (TFT)s, is positioned at respectively this sweep trace and respectively this signal wire confluce, is used as the respectively on-off element of this pixel.
12. as the LCD of claim 10, wherein this LCD also includes many pixel capacitors leads, is located at respectively respectively in this pixel and is electrically connected with this thin film transistor (TFT) respectively.
13. as the LCD of claim 10, wherein this LCD also includes a plurality of colored filters and is located at this upper substrate surface, and respectively this colored filter all includes redness, green and blue three kinds of optical filters.
14. as the LCD of claim 10, wherein this LCD also includes a plurality of colored filters and is located at this infrabasal plate surface, and respectively this colored filter all includes redness, green and blue three kinds of optical filters.
15. as the LCD of claim 10, wherein this display also includes two Polarizers, is located at the uper side surface of this upper substrate and the downside surface of this infrabasal plate respectively.
16. as the LCD of claim 10, wherein respectively this photoresist separation material is located at respectively respectively in this pixel.
17. as the LCD of claim 10, wherein this conductive material layer is a transparent indium tin oxide layer.
18. as the LCD of claim 10, wherein this common electrode lead is formed by aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131267 CN1292301C (en) | 2003-05-12 | 2003-05-12 | Liquid crystal display device with homogeneous shared voltage and producing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131267 CN1292301C (en) | 2003-05-12 | 2003-05-12 | Liquid crystal display device with homogeneous shared voltage and producing method thereof |
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| CN1549035A CN1549035A (en) | 2004-11-24 |
| CN1292301C true CN1292301C (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03131267 Expired - Lifetime CN1292301C (en) | 2003-05-12 | 2003-05-12 | Liquid crystal display device with homogeneous shared voltage and producing method thereof |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100464212C (en) * | 2005-04-08 | 2009-02-25 | 群康科技(深圳)有限公司 | Liquid crystal display and manufacturing method thereof |
| CN101144954B (en) * | 2007-11-09 | 2010-06-02 | 友达光电股份有限公司 | Liquid crystal display and liquid crystal display panel |
| CN101477976B (en) * | 2009-01-23 | 2010-09-01 | 友达光电股份有限公司 | Display panel with signal reaction time homogenized and manufacturing method thereof |
| CN101813854B (en) * | 2009-02-20 | 2013-10-23 | 北京京东方光电科技有限公司 | Liquid crystal display and manufacture method thereof |
| CN102402044A (en) * | 2011-11-29 | 2012-04-04 | 深圳市华星光电技术有限公司 | Manufacture method of color film substrate, liquid crystal display panel and liquid crystal display device |
| KR101676770B1 (en) * | 2014-10-22 | 2016-11-17 | 삼성디스플레이 주식회사 | Liquid crystal display and method of manufacturing the same |
| CN107946345B (en) * | 2017-11-22 | 2020-12-11 | 京东方科技集团股份有限公司 | Color film substrate, preparation method thereof and display device |
| CN111983855A (en) | 2020-08-10 | 2020-11-24 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
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2003
- 2003-05-12 CN CN 03131267 patent/CN1292301C/en not_active Expired - Lifetime
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