CN102944952A - Color film substrate and manufacturing method thereof and display panel - Google Patents
Color film substrate and manufacturing method thereof and display panel Download PDFInfo
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- CN102944952A CN102944952A CN2012104554888A CN201210455488A CN102944952A CN 102944952 A CN102944952 A CN 102944952A CN 2012104554888 A CN2012104554888 A CN 2012104554888A CN 201210455488 A CN201210455488 A CN 201210455488A CN 102944952 A CN102944952 A CN 102944952A
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Abstract
The embodiment of the invention provides a color film substrate and a manufacturing method thereof and a display panel, which relate to the field of displaying, and can be used for increasing the contrast of a display and further improving the displaying quality of the display. The color film substrate comprises a first transparent electrode layer, a black matrix pattern, uniformly-arranged display units and a second transparent electrode layer, wherein the first transparent electrode layer is positioned on a substrate; the black matrix pattern is positioned on the first transparent electrode layer; the uniformly-arranged display units are formed in a pixel region formed by encircling the black matrix pattern; the second transparent electrode layer covers the display unit and the black matrix pattern; and each display unit comprises a plurality of patterns for displaying sub-pixel material layers of images, and a pattern of an electrochromic display device (ECD) sub-pixel material layer for controlling display contrast. The color film substrate is applied to manufacturing of display panels.
Description
Technical field
The present invention relates to the demonstration field, relate in particular to a kind of color membrane substrates and preparation method thereof and display panel.
Background technology
Progress and development in science and technology along with society, Thin Film Transistor-LCD (Thin FilmTransistor Liquid Crystal Display, abbreviation TFT-LCD) become the main product that current era shows the field, in commercial production, daily life, play vital effect, also more and more be subject to people's favor.Simultaneously, people are also more and more higher to the quality requirements of display, and such as high brightness, high-contrast, the displays such as low-power consumption have become main product, and the contrast of liquid crystal display has directly been reacted display quality to a great extent at present.
In order to improve the display quality of liquid crystal display, the research staff has done a lot of work, by at RGB (Red-Green-Blue, the abbreviation R-G-B) sub-pixel designs the 4th sub-pixels outward again, (Red-Green-Blue-white is called for short the structure TFT-LCD of R-G-B-Bai) to preferred RGBW.Use the TFT-LCD of the many preparations of colored filter of this structure, because the existence of white sub-pixels having been arranged, can effectively improve the transmitance of whole liquid crystal panel, the brightness that namely can improve liquid crystal display.But because the existence of the 4th sub-pixel being arranged, so that its brightness meeting when dark attitude improves accordingly, so can cause the contrast of liquid crystal display not high enough.
Summary of the invention
Embodiments of the invention provide a kind of color membrane substrates and preparation method thereof and display panel, can improve the contrast of display, and then improve the display quality of display.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, a kind of color membrane substrates is provided, comprise the first transparent electrode layer that is positioned on the substrate, be positioned at the black graph of matrix shape on described the first transparent electrode layer, the evenly distributed display unit that the pixel region that surrounds described black graph of matrix shape forms covers the second transparent electrode layer of described display unit and described black graph of matrix shape;
Wherein said each display unit comprises the figure of a plurality of sub-pixel material layers for showing image, and described display unit also comprises: the figure that is used for the electrochromic device ECD sub-pixel material layer of control display contrast.
Optionally, described color membrane substrates also comprises: the resin bed that covers described the second transparent electrode layer.
Optionally, the part of the corresponding described figure for showing image sub-pixel material layer of described the first transparent electrode layer and/or described the second transparent electrode layer is removed.
Optionally, described ECD sub-pixel material layer is yellow or white or random color.
Second aspect provides a kind of method for making of color membrane substrates, comprising:
Form one deck the first transparent electrode layer at substrate;
Form black graph of matrix shape at described the first transparent electrode layer;
The pixel region that surrounds the above black graph of matrix shape of described the first transparent electrode layer is formed for showing the figure of the sub-pixel material layer of image;
The pixel region that surrounds the above black graph of matrix shape of described the first transparency electrode is formed for the figure of the electrochromic device ECD sub-pixel material layer of control display contrast;
Figure at all sub-pixel material layers of described black graph of matrix shape and described pixel region forms one deck the second transparent electrode layer.
Optionally, described method also comprises:
Form one deck resin bed at described the second transparent electrode layer.
Optionally, described after substrate forms one deck the first transparent electrode layer, the method also comprises:
Remove the part of the figure of the corresponding described sub-pixel material layer for showing image of described the first transparent electrode layer by composition technique.
Optionally, the figure of described all sub-pixel material layers at described black graph of matrix shape and described pixel region also comprises after forming one deck the second transparent electrode layer:
Remove the part of the figure of the corresponding described sub-pixel material layer for showing image of described the second transparent electrode layer by composition technique.
Optionally, the figure of described ECD sub-pixel material layer is inorganic electrochromic material, perhaps organic electrochromic material, perhaps organic/inorganic compound electrochromic material.
Optionally, described organic electrochromic material includes but not limited to: polythiophene class and derivant thereof, or purple sieve essence class, or tetrathiafulvalene, or metallo phthalocyanine, or polyaniline compound compound;
Described inorganic electrochromic material comprises: tungstic acid, or molybdenum trioxide, or vanadium pentoxide.
Optionally, the described pixel region that surrounds the above black graph of matrix shape of described the first transparent electrode layer step of figure that is formed for the electrochromic device ECD sub-pixel material layer of control display contrast comprises:
Adopt ink-jet inkjet technique or mask mask blade coating technique rare gel preparation of described inorganic electrochromic material to be formed for the zone of the ECD sub-pixel of control display contrast in the pixel region that the above black graph of matrix shape of described the first transparent electrode layer surrounds;
In 50 ℃～70 ℃ scope, heat, be formed for the figure of the ECD sub-pixel material layer of control display contrast.
Optionally, the described pixel region that forms the above black graph of matrix shape of described the first transparent electrode layer step of figure that is formed for the electrochromic device ECD sub-pixel material layer of control display contrast comprises:
In the pixel region that the above black graph of matrix shape of described the first transparent electrode layer surrounds, adopt ink-jet inkjet technique with the zone of described organic electrochromic material preparation at the ECD sub-pixel that is used for the control display contrast.
The third aspect provides a kind of display panel, it is characterized in that, comprises the described arbitrary color membrane substrates of first aspect.
Color membrane substrates that embodiments of the invention provide and preparation method thereof and display panel, the figure of electrochromic device ECD sub-pixel material layer is set at the color membrane substrates of display panel, the situation that sees through in the zone of the figure at this ECD sub-pixel material layer backlight on the light transmission state control display panel of the figure by control ECD sub-pixel material layer, can increase brightness, reduction display panel the brightness when dark attitude of display panel when bright attitude, and then the contrast of raising display, the display quality of raising display.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The plan structure schematic diagram of a kind of color membrane substrates that Fig. 1 provides for embodiments of the invention;
A kind of color membrane substrates that Fig. 2 provides for embodiments of the invention is at the structural representation in AA ' cross section shown in Figure 1;
The schematic flow sheet of the method for making of a kind of color membrane substrates that Fig. 3 provides for embodiments of the invention.
Reference numeral: 1-substrate; 2-the first transparent electrode layer; 3-deceives graph of matrix shape; The figure of 4-sub-pixel material layer (being used for showing image); The figure of 5-ECD sub-pixel material layer; 6-the second transparent electrode layer; The 7-resin bed.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiments of the invention provide a kind of color membrane substrates, as shown in Figure 1, 2, comprising:
Be positioned at the first transparent electrode layer 2 on the substrate 1, be positioned at the black matrix 3 on the first transparent electrode layer 2, the evenly distributed display unit that the pixel region that surrounds this black graph of matrix shape 3 forms, the second transparent electrode layer 6 that covers display unit and deceive graph of matrix shape 3; Wherein each display unit comprises the figure 4 of a plurality of sub-pixel material layers for showing image, and display unit also comprises: the figure 5 that is used for electrochromic device ECD (Electrochromic Device) the sub-pixel material layer of control display contrast.
Concrete, the figure 5 of ECD sub-pixel material layer is yellow or white or random color.
Stable, reversible change color can occur in the optical properties of electrochromic material under the effect of extra electric field, show as in appearance the reversible variation of color and transparency.The electrochromic device of using the electrochromic material making has this characteristic of electrochromic material equally.This optical properties includes but not limited to: reflectivity, transmitance, absorptivity.In addition, the figure of the display unit that provides here comprises a plurality of sub-pixel material layers for showing image is not limited to the figure of RGB RGB three primary colors sub-pixel material layer, can certainly be the structure that comprises the figure of four or more multiplex sub-pixel material layer in the image color matching.
Optionally, color membrane substrates also comprises: the resin bed 7 that covers the second transparent electrode layer.Since can be on the second transparent electrode layer height of formation poor, adopt like this resin bed 7 levellings the second transparent electrode layer; Then form other structural sheets of color membrane substrates at the resin bed that forms, such as liquid crystal aligning layer etc., so that display panel box is thick consistent everywhere after to box, guarantee the display effect of display panel with this, certainly this color membrane substrates also comprises common electrode layer under twisted nematic (Twisted Nematic is called for short TN) display mode.
Further, the first transparent electrode layer and/or the second transparent electrode layer are removed the part of the figure of the sub-pixel material layer that is applied to show image, like this owing to having kept the first transparent electrode layer corresponding to black graph of matrix shape and/or the second transparent electrode layer, therefore the first transparent electrode layer is on whole substrate or the integral body of electric connection, certain the second transparent electrode layer also is the integral body of electric connection on whole substrate, so like this because the first transparent electrode layer and/or the second transparent electrode layer are removed the transmitance that relatively can guarantee display panel to the part of the figure of the sub-pixel material layer that is applied to show image.
In addition, by to transparent electrode layer (the first transparent electrode layer and the second transparent electrode layer) added electric field at display unit place and not added electric field control the brightness of the display at this display unit place, when this display panel at display place during in bright attitude, to the transparency electrode at display unit place added electric field not, this moment, ECD presented transparent state, the figure of ECD sub-pixel material layer is realized clear state, the transmitance of display panel is high, this so that the display brightness of display when bright attitude get a promotion; When this display panel during in dark attitude, transparency electrode extra electric field to the display unit place, the ECD of this moment then can present light tight state, the figure of ECD sub-pixel material layer presents light tight state, the transmitance of display panel is low, this so that the display brightness of display when dark attitude effectively reduced.Display brightness during the bright attitude of display promotes, and the display brightness during dark attitude reduces, thereby (ratio of the brightness of the brightness during bright attitude during with dark attitude) obviously promotes so that the contrast of display.
The color membrane substrates that embodiments of the invention provide, the figure of electrochromic device ECD sub-pixel material layer is set at the color membrane substrates of display panel, the situation that sees through in the zone of the figure at this ECD sub-pixel material layer backlight on the light transmission state control display panel of the figure by control ECD sub-pixel material layer, can increase brightness, reduction display panel the brightness when dark attitude of display panel when bright attitude, and then the contrast of raising display, the display quality of raising display; Simultaneously, can guarantee the transmitance of display panel.
Embodiments of the invention provide a kind of method for making of color membrane substrates, as shown in Figure 2, may further comprise the steps:
201, form one deck the first transparent electrode layer at substrate.
Concrete, adopt magnetically controlled sputter method or chemical vapor deposited method, at whole substrate deposition one deck the first transparent electrode layer.Here the material that this first transparent electrode layer is commonly used is ITO (Indium Tin Oxides, indium tin oxide) or the transparent conductive materials such as IZO (Indium Zinc Oxide, indium-zinc oxide) or Graphene, and thickness exists
Extremely
Between.
Optionally, the method also comprises by composition technique and removes this first transparent electrode layer to the part of the figure that is applied to following demonstration image sub-pixel material layer.
202, form black graph of matrix shape at the first transparent electrode layer.
Above-mentioned through the color membrane substrates after 201 step process on, use the black graph of matrix shape material layer of process for chemical vapor deposition of materials with via deposition chromium or chromium oxide composition, perhaps with the black graph of matrix shape material layer of coating dispersion method application of resin composition.By exposure technology and chemical etching technique (chromium or chromium oxide composition) or chemical development (resinous principle), form black graph of matrix shape at the first transparent electrode layer with mask plate.
203, the pixel region that surrounds the black graph of matrix shape of the first transparent electrode layer is formed for showing the figure of the sub-pixel material layer of image.
Utilize the coating dispersion method at the red pixel resin bed of the color membrane substrates coating 1um that processes through step 202 to 5um, this pixel resin layer material is acrylic compounds photoresist or other carboxylic acid type color pigments resins normally.Then, the figure of the certain area formation red sub-pixel material layer on substrate by exposure technology and chemical development technique;
Adopt and the similar method of preparation red sub-pixel material layer, form the figure of the sub-pixel material layer of green, blue or other colors at the certain area of substrate.
204, the pixel region that surrounds the black graph of matrix shape of the first transparent electrode layer is formed for the figure of the electrochromic device ECD sub-pixel material layer of control display contrast.
Wherein, the figure of this ECD sub-pixel material layer is inorganic electrochromic material, perhaps organic electrochromic material, perhaps organic/inorganic compound electrochromic material.
Organic electrochromic material includes but not limited to: polythiophene class and derivant thereof, or purple sieve essence class, or tetrathiafulvalene, or metallo phthalocyanine, or polyaniline compound compound; Inorganic electrochromic material comprises: tungstic acid, or molybdenum trioxide, or vanadium pentoxide.
Concrete, when adopting inorganic electrochromic material, step 204 can be used to form rare gel preparation of inorganic electrochromic material the zone of the ECD sub-pixel of control display contrast for adopting inkjet technique or mask blade coating technique in the pixel region that the black graph of matrix shape of the first transparent electrode layer surrounds; In 50 ℃～70 ℃ scope, heat, be formed for the figure of the ECD sub-pixel material layer of control display contrast.
Optionally, when adopting organic electrochromic material, step 204 can be for adopting inkjet technique with the zone of organic electrochromic material preparation at the ECD sub-pixel that is used for the control display contrast in the pixel region that surrounds the black graph of matrix shape of the first transparent electrode layer.
Stable, reversible change color can occur in the optical properties of the electrochromic material that adopts here under the effect of extra electric field, show as in appearance the reversible variation of color and transparency.The electrochromic device of using the electrochromic material making has this characteristic of electrochromic material equally.This optical properties includes but not limited to: reflectivity, transmitance, absorptivity.
205, above the figure of all sub-pixel material layers of deceiving graph of matrix shape and pixel region, form one deck the second transparent electrode layer.
Can adopt the method for similar making the first transparent electrode layer, above the figure of all sub-pixel material layers of deceiving graph of matrix shape and pixel region, adopt magnetically controlled sputter method or chemical vapor deposited method to form the second transparent electrode layer, the material that this second transparent electrode layer is commonly used is ITO (Indium Tin Oxides, indium tin oxide) or IZO (Indium Zinc Oxide, indium-zinc oxide) or the transparent conductive material such as Graphene, thickness exists
Extremely
Between.
Optionally, the method also comprises by composition technique and removes the second transparent electrode layer to the part of the figure of the sub-pixel material layer that is applied to show image.
206, form one deck resin bed at the second transparent electrode layer.
Can adopt and make the black similar method of graph of matrix shape, apply a layer thickness at the second transparent electrode layer and exist
Arrive
Resin bed; Because meeting height of formation on the second transparent electrode layer is poor in manufacturing process, adopt like this resin bed levelling the second transparent electrode layer, then form other structural sheets of color membrane substrates at the resin bed that forms, such as liquid crystal aligning layer etc., so that display panel box is thick consistent everywhere after to box, guarantee the display effect of display panel with this, this color membrane substrates also comprises common electrode layer under twisted nematic (Twisted Nematic is called for short TN) display mode certainly.
Further, remove the first transparent electrode layer and/or the second transparent electrode layer to the part of the figure of the sub-pixel material layer that is applied to show image, divide corresponding the first transparent electrode layer and/or the second transparent electrode layer owing to having kept black graph of matrix shaped part like this, therefore the first transparent electrode layer is on whole substrate or the integral body of electric connection, certain the second transparent electrode layer also is the integral body of electric connection on whole substrate, so like this because the first transparent electrode layer and/or the second transparent electrode layer are removed the transmitance that relatively can guarantee display panel to the part of the figure of the sub-pixel material layer that is applied to show image.
Like this, by to transparent electrode layer (the first transparent electrode layer and the second transparent electrode layer) added electric field at display unit place and not added electric field control the brightness of the display at this display unit place, when the display panel at display place during in bright attitude, to the transparency electrode at display unit place added electric field not, this moment, ECD presented transparent state, the figure of ECD sub-pixel material layer is realized clear state, the transmitance of display panel is high, this so that the display brightness of display when bright attitude get a promotion; When this display panel during in dark attitude, transparency electrode extra electric field to the display unit place, the ECD of this moment then can present light tight state, the figure of ECD sub-pixel material layer presents light tight state, the transmitance of display panel is low, this so that the display brightness of display when dark attitude effectively reduced.Display brightness during the bright attitude of display promotes, and the display brightness during dark attitude reduces, thereby (ratio of the brightness of the brightness during bright attitude during with dark attitude) obviously promotes so that the contrast of display.
The method for making of the color membrane substrates that embodiments of the invention provide, make the figure of one deck electrochromic device ECD sub-pixel material layer at the color membrane substrates of display panel, the light transmission state of the figure by control ECD sub-pixel material layer comes the situation that sees through in the zone of the figure at this ECD sub-pixel material layer backlight on the control display panel, can increase brightness, reduction display panel the brightness when dark attitude of display panel when bright attitude, and then the contrast of raising display, the display quality of raising display; In addition, can guarantee the transmitance of display panel.
Embodiments of the invention provide a kind of display panel, comprise the arbitrary color membrane substrates in above-described embodiment.This display panel can be any product or parts with Presentation Function such as liquid crystal panel, Electronic Paper, oled panel, mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.Certainly this display panel can be display panels, namely only needs array base palte with the color membrane substrates of this moulding and corresponding moulding to box and inject liquid crystal to get final product.
The display panel that embodiments of the invention provide, the figure of electrochromic device ECD sub-pixel material layer is set at the color membrane substrates of display panel, the situation that sees through in the zone of the figure at this ECD sub-pixel material layer backlight on the light transmission state control display panel of the figure by control ECD sub-pixel material layer, can increase brightness, reduction display panel the brightness when dark attitude of display panel when bright attitude, and then the contrast of raising display, improve the display quality of display, guarantee the transmitance of display panel.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (13)
1. color membrane substrates, it is characterized in that, comprise the first transparent electrode layer that is positioned on the substrate, be positioned at the black graph of matrix shape on described the first transparent electrode layer, the evenly distributed display unit that the pixel region that surrounds described black graph of matrix shape forms covers the second transparent electrode layer of described display unit and described black graph of matrix shape;
Wherein said each display unit comprises the figure of a plurality of sub-pixel material layers for showing image, and described display unit also comprises: the figure that is used for the electrochromic device ECD sub-pixel material layer of control display contrast.
2. color membrane substrates according to claim 1 is characterized in that, described color membrane substrates also comprises: the resin bed that covers described the second transparent electrode layer.
3. color membrane substrates according to claim 2 is characterized in that, the part of the corresponding described figure for showing image sub-pixel material layer of described the first transparent electrode layer and/or described the second transparent electrode layer is removed.
4. color membrane substrates according to claim 1 and 2 is characterized in that, also comprises:
Described ECD sub-pixel material layer is yellow or white or random color.
5. the method for making of a color membrane substrates is characterized in that, comprising:
Form one deck the first transparent electrode layer at substrate;
Form black graph of matrix shape at described the first transparent electrode layer;
The pixel region that surrounds the above black graph of matrix shape of described the first transparent electrode layer is formed for showing the figure of the sub-pixel material layer of image;
The pixel region that surrounds the above black graph of matrix shape of described the first transparency electrode is formed for the figure of the electrochromic device ECD sub-pixel material layer of control display contrast;
Figure at all sub-pixel material layers of described black graph of matrix shape and described pixel region forms one deck the second transparent electrode layer.
6. method according to claim 5 is characterized in that, described method also comprises:
Form one deck resin bed at described the second transparent electrode layer.
7. method according to claim 5 is characterized in that, and is described after substrate forms one deck the first transparent electrode layer, also comprises:
Remove the part of the figure of the corresponding described sub-pixel material layer for showing image of described the first transparent electrode layer by composition technique.
8. method according to claim 5 is characterized in that, the figure of described all sub-pixel material layers at described black graph of matrix shape and described pixel region also comprises after forming one deck the second transparent electrode layer:
By composition technique remove the corresponding described sub-pixel material layer for showing image of described the second transparent electrode layer the part of figure.
9. described either method is characterized in that according to claim 5～8, and the figure of described ECD sub-pixel material layer is inorganic electrochromic material, perhaps organic electrochromic material, perhaps organic/inorganic compound electrochromic material.
10. method according to claim 9 is characterized in that,
Described organic electrochromic material includes but not limited to: polythiophene class and derivant thereof, or purple sieve essence class, or tetrathiafulvalene, or metallo phthalocyanine, or polyaniline compound compound;
Described inorganic electrochromic material comprises: tungstic acid, or molybdenum trioxide, or vanadium pentoxide.
11. method according to claim 9, it is characterized in that, the step of figure that the described pixel region that surrounds the above black graph of matrix shape of described the first transparent electrode layer is formed for the electrochromic device ECD sub-pixel material layer of control display contrast comprises:
Adopt ink-jet inkjet technique or mask mask blade coating technique rare gel preparation of described inorganic electrochromic material to be formed for the zone of the ECD sub-pixel of control display contrast in the pixel region that the above black graph of matrix shape of described the first transparent electrode layer surrounds;
In 50 ℃～70 ℃ scope, heat, be formed for the figure of the ECD sub-pixel material layer of control display contrast.
12. method according to claim 9, it is characterized in that, the step of figure that the described pixel region that surrounds the above black graph of matrix shape of described the first transparent electrode layer is formed for the electrochromic device ECD sub-pixel material layer of control display contrast comprises:
In the pixel region that the above black graph of matrix shape of described the first transparent electrode layer surrounds, adopt ink-jet inkjet technique with the zone of described organic electrochromic material preparation at the ECD sub-pixel that is used for the control display contrast.
13. a display panel is characterized in that, comprises the described arbitrary color membrane substrates of claim 1～4.
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