CN101916006B - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN101916006B CN101916006B CN2010102537484A CN201010253748A CN101916006B CN 101916006 B CN101916006 B CN 101916006B CN 2010102537484 A CN2010102537484 A CN 2010102537484A CN 201010253748 A CN201010253748 A CN 201010253748A CN 101916006 B CN101916006 B CN 101916006B
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Abstract
The invention provides a liquid crystal display device, which comprises a first substrate, a second substrate and a liquid crystal layer sandwiched between the first substrate and the second substrate, wherein the side, facing the liquid crystal layer, of the first substrate is provided with a functional membrane layer which has a plurality of convex parts and/or concave parts and also provided with a flattened medium layer covering the functional membrane layer and a metal reflecting layer on the flattened medium layer. The functional membrane layer comprises one or more than two of a gate metal layer, a gate insulated layer, a semiconductor layer, a source-drain metal layer and an insulated protective layer. The liquid crystal display device and the manufacturing method thereof can avoid single-angle mirror reflection of a smooth plane to improve the reflectivity of diffuse reflection and expand a reflection view angle. In addition, compared with technology for improving backlight brightness, the method can ensure high visuality of a liquid crystal display used indoor and outdoor in the sun without increasing the overall power consumption of the liquid crystal display.
Description
Technical field
The present invention relates to technical field of flat panel display, particularly a kind of liquid crystal indicator and preparation method thereof.
Background technology
LCD (LCD) is as a kind of flat-panel monitor, have clear picture accurately, plurality of advantages such as thin thickness, in light weight, radiationless, low energy consumption and WV be low, be applied in the every field widely at present.Usually; LCD has two substrates that contain electrode; And be arranged on the liquid crystal layer between the two substrates; The electric field intensity that is applied to this liquid crystal layer through the control of the electrode on the two substrates is controlled the deflection of liquid crystal molecule, and then adjusts the transmissivity of incident light, to realize the bright and dark control of display pixel.
(Thin Film Transistor has increasing use during TFT) LCD is lived in modern times to thin film transistor (TFT), mobile phone display screen for example, Note Book display screen, MP3, MP4 display screen, GPS display screen, LCD-TV display screen etc.Along with the development of TFT-LCD technology, people are also increasingly high to its performance demands, not only when indoor light is softer, require it to have good visuality, and also need it to have good visibility under the strong out of doors sunshine.
Common full-transparency type TFT LCD can not satisfy above-mentioned requirements; When using out of doors; Owing to the strong reflection of sunlight, need to improve the surface brightness of TFT LCD, perhaps make one deck and reduce catoptrical material on the surface of TFT display screen; Just can have good visuality, reach the requirement of using out of doors.As a rule; Improving surface brightness can only be through improving the brightness of TFT LCD backlight; Yet the raising of TFT liquid crystal display device backlight lightness has but increased the overall power of device; Power system to device is had higher requirement, such as mobile phone, must use high-octane battery could satisfy request for utilization.
So, how could under the situation that does not increase device power consumption, make the TFT LCD satisfy when using under the indoor and outdoor sunlight and all have good visuality, become the emphasis problem that these those skilled in the art pay close attention to.People have invented total reflection and semi-transparent semi TFT LCD in practice; And in total reflection and semi-transparent semi TFT LCD; Its gordian technique is exactly how to promote reflectivity and spread reflection visual angle; In other words, to avoid the single angle direct reflection of smooth flat exactly.Therefore, the TFT LCD to total reflection or semi-transflective reflective type has the inevitable requirement that irreflexive structure just becomes market.
Summary of the invention
The problem that the present invention solves provides a kind of liquid crystal indicator with diffuse reflective structure, can promote irreflexive reflectivity.
For addressing the above problem, the present invention provides a kind of liquid crystal indicator, comprising: first substrate, second substrate and be clipped in the liquid crystal layer between said first substrate and second substrate, and said first substrate has functional film layer towards the one side of said liquid crystal layer; Wherein, have a plurality of lug bosses and/or a plurality of depressed part in the said functional film layer; It is characterized in that, also comprise:
Be covered in planarized dielectric layer and the metallic reflector on the said planarized dielectric layer on the said functional film layer.
Said first substrate comprises reflector space and transmission region, and said planarized dielectric layer is positioned at reflector space.
The surface undulation degree of said planarized dielectric layer is less than the surface undulation degree of said functional film layer.
The thickness of said planarized dielectric layer is thickness half that is positioned at the liquid crystal layer of viewing area outside the planarized dielectric layer.
Said functional film layer comprises the more than one or at least two combinations in gate metal layer, gate insulator, semiconductor layer, source-drain electrode metal level and the insulating protective layer.
In said a plurality of lug boss, the combination of the functional film layer that at least two lug bosses comprised is different;
And/or,
In said a plurality of depressed part, the combination of the functional film layer that at least two depressed parts comprised is different.
In said a plurality of lug boss, have difference in height between the adjacent lug boss, in said a plurality of depressed parts, adjacent depressed part has depth difference; Wherein, said planarized dielectric layer is covered on said a plurality of lug boss and a plurality of depressed part, and the surface undulation degree that said difference in height or depth difference are caused reduces.
Have thin film transistor region on said second substrate, said metallic reflector expands to said thin film transistor region top.
The functional film layer of adjacent protrusion portion is a complementary structure.
Said lug boss and/or depressed part are point-like, circle, ellipse, polygon, irregularly shaped or their combination.
Compared with prior art, technique scheme has the following advantages:
Liquid crystal indicator provided by the invention; Through (for example being arranged in the liquid crystal panel; Tft array substrate is towards liquid crystal layer one side) functional film layer in a plurality of lug bosses and/or a plurality of depressed part, thereby form diffuse reflective structure at the side to light of tft array substrate, can avoid the single angle direct reflection of smooth flat; Be covered in its surface undulation degree of planarized dielectric layer on said a plurality of lug boss and/or a plurality of depressed part less than the surface undulation degree of lug boss and depressed part; Can reach well-regulated mild transition, the metallic reflector that on the planarized dielectric layer, forms then just has more suitable surface gradient, thereby improves irreflexive effect.
Description of drawings
Shown in accompanying drawing, above-mentioned and other purpose, characteristic and advantage of the present invention will be more clear.Reference numeral identical in whole accompanying drawings is indicated identical part.Painstakingly do not draw accompanying drawing, focus on illustrating purport of the present invention by physical size equal proportion convergent-divergent.
Fig. 1 is the sectional view of liquid crystal indicator in the embodiment of the invention;
Fig. 2 is the part sectioned view of liquid crystal indicator tft array substrate in the embodiment of the invention;
Fig. 3 is the vertical view of liquid crystal indicator tft array substrate in the present embodiment;
Fig. 4 is the part sectioned view of liquid crystal indicator in the embodiment of the invention;
Fig. 5 is the vertical view of tft array substrate among Fig. 4.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, does detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Set forth a lot of details in the following description so that make much of the present invention, implement but the present invention can also adopt other to be different from alternate manner described here, so the present invention has not received the restriction of following disclosed specific embodiment.
Secondly, the present invention combines synoptic diagram to be described in detail, when the embodiment of the invention is detailed; For ease of explanation; The sectional view of indication device structure can be disobeyed general ratio and done local the amplification, and said synoptic diagram is example, and it should not limit the scope of the present invention's protection at this.The three dimensions size that in actual fabrication, should comprise in addition, length, width and the degree of depth.
Said as the background technology part; Has good visuality when using under the indoor and outdoor sunlight for making total reflection or semi-transparent semi TFT LCD satisfy; How when promoting reflectivity and spread reflection visual angle, not consume more power, become the emphasis problem of common concern in the industry.
The inventor discovers; Can be through irreflexive structure being set to avoid the single angle direct reflection of smooth flat; Based on this, the present invention proposes a kind of liquid crystal indicator and preparation method thereof, through being arranged at the inner concaveconvex structure of liquid crystal panel and on concaveconvex structure, covering the planarized dielectric layer; Avoid single angle direct reflection to form diffuse reflection, thereby promote irreflexive reflectivity and spread reflection visual angle.
Specify a specific embodiment of liquid crystal indicator according to the invention below in conjunction with accompanying drawing; Be outstanding characteristics of the present invention; Do not provide in the accompanying drawing and the inevitable directly related part of inventive point of the present invention; For example, the pixel electrode of the concrete structure of liquid crystal molecule, colored filter substrate, tft array substrate, sweep trace and data line etc.
Fig. 1 is the sectional view of liquid crystal indicator in the present embodiment.As shown in Figure 1; Said liquid crystal indicator comprises: the colored filter substrate that is oppositely arranged (also claiming second substrate, down together) 20 and tft array substrate (also claiming first substrate, down together) 10; Be filled in the liquid crystal layer 107 between the two substrates; Colored filter substrate 20 is first polaroid 120 on the one side of liquid crystal layer 107 dorsad, and tft array substrate 10 is the second polaroid (not shown) on the one side of liquid crystal layer 107 dorsad, and liquid crystal layer 107 is sealed in the frame glue 101 between the two substrates.
Usually, liquid crystal indicator comprises viewing area and non-display area.Wherein, non-display area is positioned at the zone outside the viewing area.Liquid crystal layer 107 for example comprises TN type or STN type liquid crystal molecule, also can comprise the negative type liquid crystal molecule.
As shown in Figure 1, said colored filter substrate 20 comprises: second glass substrate 103, colour filter 108, black-matrix layer 109, common electrode layer 102; Wherein, said colour filter 108 is positioned at second glass substrate 103 on the one side of liquid crystal layer 107, and this colour filter 108 is made up of the red, green, blue color filter; Said black-matrix layer 109 is located between the red, green, blue color filter, and the red, green, blue color filter is spaced from each other; Said common electrode layer 102 covers colour filter 108 and black-matrix layer 109.
Comprise with said colored filter substrate 20 relative tft array substrates 10: first glass substrate 100, cross one another data line that on the one side of liquid crystal layer 107, is provided with at said first glass substrate 100 and sweep trace (not shown) and a plurality of pixel regions that data line and sweep trace limited; Said pixel region comprises pixel electrode 106, thin film transistor (TFT) 105 and MM CAP (not shown).
Said tft array substrate 10 has the functional film layer (not shown) towards the one side of said liquid crystal layer; Wherein, have a plurality of lug bosses and/or a plurality of depressed part in the said functional film layer.Said functional film layer comprises the more than one or at least two combinations in gate metal layer, gate insulator, semiconductor layer, source-drain electrode metal level and the insulating protective layer.Circuit structures such as data line, sweep trace, thin film transistor (TFT) and MM CAP in the said tft array substrate 10 also are made up of the above-mentioned functions rete.
Liquid crystal indicator also comprises planarized dielectric layer and the metallic reflector on the said planarized dielectric layer, the below detailed description that is covered on the said functional film layer in the present embodiment.
Fig. 2 is the part sectioned view of tft array substrate in the present embodiment.As shown in the figure, adjacent lug boss A and lug boss B are positioned at the one side of first glass substrate 100 towards the liquid crystal layer (not shown), in other words, tft array substrate shown in the figure be positioned at not shown colored filter substrate below.Form depressed part C between said adjacent lug boss A and the lug boss B.
Lug boss A comprises gate metal layer 11, gate insulator 12, semiconductor layer 13 and source-drain electrode metal level 14 from bottom to top; Also be; The functional film layer that constitutes lug boss A is the rhythmo structure of gate metal layer 11, gate insulator 12, semiconductor layer 13 and source-drain electrode metal level 14; Have planarized dielectric layer 33 above the said functional film layer, also promptly, planarized dielectric layer 33 is covered on lug boss A, lug boss B and the depressed part C.
Lug boss B comprises gate metal layer 11, gate insulator 12, semiconductor layer 13, source-drain electrode metal level 14 and insulating protective layer 15; Also promptly, the functional film layer of formation lug boss B is the rhythmo structure of gate metal layer 11, gate insulator 12, semiconductor layer 13, source-drain electrode metal level 14 and insulating protective layer 15.Because have no functional film layer between adjacent lug boss A and the lug boss B, thereby form depressed part C, its bottom is the surface of first glass substrate 100.
Said functional film layer covers planarized dielectric layer 33 towards the one side of liquid crystal layer; Has metallic reflector 17 on the said planarized dielectric layer 33; In other words, planarized dielectric layer 33 is covered on lug boss A, B and the depressed part C, and metallic reflector 17 covers said planarized dielectric layer.The surface undulation degree of said planarized dielectric layer 33 is less than the surface undulation degree of said functional film layer; So can reach well-regulated mild transition; The metallic reflector 17 that on planarized dielectric layer 33, forms then just has more suitable surface gradient, thereby improves irreflexive effect.
Only show two lug bosses and a depressed part among Fig. 2, in fact, have a plurality of lug bosses and a plurality of depressed part in the said functional film layer of present embodiment; Fig. 3 is the vertical view of liquid crystal indicator tft array substrate in the present embodiment, and is as shown in Figure 3, a plurality of lug boss A1, A2 ... An arranges according to matrix form; A plurality of depressed part C1, C2 ... Cn also arranges according to matrix form; Wherein, depressed part is between adjacent lug boss, and arrange lug boss and depressed part space.
Fig. 4 is the part sectioned view of liquid crystal indicator in the present embodiment, and Fig. 5 is the vertical view of tft array substrate among Fig. 4, and said tft array substrate comprises reflector space 61 and transmission region 51, and said planarized dielectric layer 33 is positioned at reflector space 61.Wherein reflector space 61 is coated with transparent planarized dielectric layer; 33 transmission regions 51 are the not covering of this planarized dielectric layer 33 then, so, utilizes the thickness of planarized dielectric layer; Can effectively solve the problem of transmission region 51 and reflector space 61 optical path differences, thereby improve reflecting effect.Preferably, the thickness of said planarized dielectric layer is thickness half that is positioned at the liquid crystal layer of viewing area outside the planarized dielectric layer.
As shown in Figure 5; Said planarized dielectric layer 33 is arranged in reflector space 61; Be covered in (gate metal layer 11, semiconductor layer 13 and source-drain electrode metal level 14 overlapping parts among the figure) on the TFT transistor, so utilize this planarized dielectric layer 33 can effectively reduce pixel electrode to data line 14 or to the coupling capacitance of gate line 11, so; Metallic reflector 17 on the planarized dielectric layer 33 can cover the TFT transistor sites; Can expand the area of pixel electrode like this,, thereby further improve reflectivity with the raising aperture opening ratio.
In the present embodiment, said each lug boss and/or depressed part are circular basically, but are not limited to this, and among other embodiment of the present invention, each lug boss and/or depressed part also can be point-like, ellipse, polygon, irregularly shaped or their combination.The shape of each lug boss can be the same or different, and the shape of each depressed part can be the same or different, and the shape of lug boss and depressed part can be the same or different.
In the present embodiment, a plurality of depressed parts are positioned at the functional film layer on the tft array substrate, and wherein, the combination of the functional film layer that at least two depressed parts comprised is different.For example, depressed part C bottom is first glass substrate 100, and the bottom of another depressed part (not shown) that is adjacent is a gate metal layer; So; Form depth difference between the adjacent depressed part, also can be formed with the spatial structure of stereovision, strengthen diffuse effect.And the depressed part that forms depth difference is not limited in position adjacent.
In the present embodiment, arrange depressed part and lug boss space, and in other words, depressed part is between two adjacent lug bosses, and boss is between two adjacent depressed parts.As optional mode, among other embodiment of the present invention, depressed part and lug boss are not limited to be spaced; Depressed part and the lug boss particular distance of can being separated by; Perhaps, in functional film layer, only have a plurality of lug bosses, also can in functional film layer, only have a plurality of depressed parts.
A plurality of lug boss A1, A2 ... An and a plurality of depressed part C1, C2 ... Cn is positioned at the NOT-circuit district; The alleged NOT-circuit district of this paper is meant, does not contain the viewing area of circuit structures such as sweep trace, data line, thin film transistor (TFT), MM CAP and connecting through hole.For example, the corresponding a plurality of rectangular areas of pixel electrode.
Preferably, the functional film layer of adjacent lug boss is a complementary structure in the present embodiment, and in other words, the area of adjacent protrusion portion corresponding crucial rete separately complements one another.As shown in Figure 2, ascending being followed successively by of each crucial rete area of lug boss A: gate metal layer 11, semiconductor layer 13, source-drain electrode metal level 14; Descending being followed successively by of each crucial rete area of lug boss B: gate metal layer 11, semiconductor layer 13, source-drain electrode metal level 14.That is to say that each crucial rete area of lug boss A increases gradually from bottom to top, and each crucial rete area of lug boss B reduces gradually from bottom to top.Wherein, " crucial rete " refer to superpose each rete of composition function rete, for example: gate metal layer, gate insulator, semiconductor layer, source-drain electrode metal level or insulating protective layer.Owing to for complimentary fashion designs, can reduce lug boss spacing each other between adjacent protrusion portion, make lug boss more dense, compact on arranging on the plane, thereby strengthen irreflexive effect.
Liquid crystal indicator in the present embodiment; Through a plurality of lug bosses and/or a plurality of depressed part in the functional film layer that is arranged on (tft array substrate is towards the liquid crystal layer one side) in the liquid crystal panel; Thereby the side to light at tft array substrate forms diffuse reflective structure; Can avoid the single angle direct reflection of smooth flat, to promote irreflexive reflectivity and spread reflection visual angle.
And, can not increase the overall power of LCD with respect to the technology that improves backlight illumination, the requirement that all has good visibility in the time of just can satisfying use under the indoor and outdoor sunlight.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, all still belongs in the scope of technical scheme protection of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (8)
1. liquid crystal indicator comprises: first substrate, second substrate and be clipped in the liquid crystal layer between said first substrate and second substrate, and said first substrate has functional film layer towards the one side of said liquid crystal layer; Wherein, have a plurality of lug bosses and/or a plurality of depressed part in the said functional film layer; It is characterized in that, also comprise:
Be covered in planarized dielectric layer and the metallic reflector on the said planarized dielectric layer on the said functional film layer;
Wherein, said first substrate comprises reflector space and transmission region, and said planarized dielectric layer is positioned at reflector space, and the surface undulation degree of said planarized dielectric layer is less than the surface undulation degree of said functional film layer.
2. liquid crystal indicator according to claim 1 is characterized in that, the thickness of said planarized dielectric layer is thickness half that is positioned at the liquid crystal layer of viewing area outside the planarized dielectric layer.
3. liquid crystal indicator according to claim 1 is characterized in that,
Said functional film layer comprises the more than one or at least two combinations in gate metal layer, gate insulator, semiconductor layer, source-drain electrode metal level and the insulating protective layer.
4. liquid crystal indicator according to claim 1 is characterized in that,
In said a plurality of lug boss, the combination of the functional film layer that at least two lug bosses comprised is different;
And/or,
In said a plurality of depressed part, the combination of the functional film layer that at least two depressed parts comprised is different.
5. liquid crystal indicator according to claim 4 is characterized in that, in said a plurality of lug bosses, has difference in height between the adjacent lug boss, and in said a plurality of depressed parts, adjacent depressed part has depth difference; Wherein, said planarized dielectric layer is covered on said a plurality of lug boss and a plurality of depressed part, and the surface undulation degree that said difference in height or depth difference are caused reduces.
6. liquid crystal indicator according to claim 4 is characterized in that, has thin film transistor region on said first substrate, and said metallic reflector expands to said thin film transistor region top.
7. liquid crystal indicator according to claim 1 is characterized in that, the functional film layer of adjacent protrusion portion is a complementary structure.
8. liquid crystal indicator according to claim 1 is characterized in that, lug boss and/or depressed part are point-like, circle, ellipse, polygon, irregularly shaped or their combination.
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| CN2010102537484A CN101916006B (en) | 2010-08-09 | 2010-08-09 | Liquid crystal display device |
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| CN2010102537484A CN101916006B (en) | 2010-08-09 | 2010-08-09 | Liquid crystal display device |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103345083A (en) * | 2013-06-19 | 2013-10-09 | 深圳市华星光电技术有限公司 | CF glass substrate, manufacturing method thereof and liquid crystal display device |
| CN103400837B (en) * | 2013-07-29 | 2016-09-07 | 京东方科技集团股份有限公司 | A kind of array base palte and preparation method thereof, display device |
| CN105136378B (en) | 2015-09-24 | 2018-04-20 | 京东方科技集团股份有限公司 | A kind of display base plate and display device |
| CN106206426B (en) * | 2016-08-01 | 2019-03-01 | 京东方科技集团股份有限公司 | Array substrate and its manufacturing method, display device |
| CN112925132A (en) * | 2021-02-09 | 2021-06-08 | 捷开通讯(深圳)有限公司 | Display panel and display device |
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| CN100543566C (en) * | 2007-03-09 | 2009-09-23 | 友达光电股份有限公司 | Make the method for display base plate |
| CN101571654A (en) * | 2008-04-28 | 2009-11-04 | 上海天马微电子有限公司 | Liquid crystal display device |
| CN101713895A (en) * | 2009-11-30 | 2010-05-26 | 信利半导体有限公司 | Liquid crystal display device and manufacturing method thereof |
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| KR100617290B1 (en) * | 2003-12-30 | 2006-08-30 | 엘지.필립스 엘시디 주식회사 | A substrate for Transflective LCD and method for fabricating of the same |
| US20050263766A1 (en) * | 2004-05-27 | 2005-12-01 | Hong-Da Liu | Pixel of a thin film transistor array substrate and method for making the same |
| TWI290771B (en) * | 2006-01-02 | 2007-12-01 | Wintek Corp | TFT substrate, liquid crystal display panel, transflective liquid crystal display device, and methods for the same |
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| CN100543566C (en) * | 2007-03-09 | 2009-09-23 | 友达光电股份有限公司 | Make the method for display base plate |
| CN101571654A (en) * | 2008-04-28 | 2009-11-04 | 上海天马微电子有限公司 | Liquid crystal display device |
| CN101713895A (en) * | 2009-11-30 | 2010-05-26 | 信利半导体有限公司 | Liquid crystal display device and manufacturing method thereof |
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