CN105278199A - Electrochromic display panel and manufacture method thereof - Google Patents
Electrochromic display panel and manufacture method thereof Download PDFInfo
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- CN105278199A CN105278199A CN201510790801.7A CN201510790801A CN105278199A CN 105278199 A CN105278199 A CN 105278199A CN 201510790801 A CN201510790801 A CN 201510790801A CN 105278199 A CN105278199 A CN 105278199A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on an electrochromic effect
- G02F1/153—Constructional details
Abstract
The invention provides an electrochromic display panel and a manufacture method thereof. The electrochromic display panel comprises the components of an array substrate (11), a color film layer (12) which is arranged on the array substrate (11), a pixel electrode layer (13) which is arranged on the color film layer (12), an electrochromic layer (14) which is arranged on the pixel electrode layer (13), a common electrode layer (15) which is arranged on the electrochromic layer (14), and a thin-film packaging layer (16) which is arranged on the common electrode layer (15). The electrochromic layer (14) is made of a black electrochromic material. The black electrochromic material is in a transparent state when not electrified. When electrification is performed, the black electrochromic material gradually turns from transparent to black along with voltage increase. The electrochromic display panel can realize colorful display and black display and furthermore has advantages of simplifying the structure of the display panel, reducing the thickness of the display panel and improving the permeability of the display panel.
Description
Technical field
The present invention relates to display technique field, particularly relate to a kind of electrochromic display panel and preparation method thereof.
Background technology
Current most widely used display panels is the control being realized light transmittance by the deflection of control liquid crystal, its structure and manufacture craft more complicated, such as: need to arrange upper and lower two-layer Polarizer to realize polarization input, the output of light, in requisition for carrying out the manufacturing process attaching Polarizer, and upper and lower Polarizer makes the effective rate of utilization of light reduce; And in order to make the liquid crystal deflection in whole display panels realize consistance, need to arrange alignment film, in requisition for the manufacturing process etc. carrying out orientation.
Along with the development of display technique, there is the display panel of employing electrochromism (Electrochromic) material.Electrochromism refers to that the phenomenon of stable, reversible color change occurs the optical properties (as reflectivity, transmitance, absorptivity etc.) of material under the effect of extra electric field, shows as the reversible change of color and transparency in appearance.The material with electrochromic property is called electrochromic material, can be divided into inorganic electrochromic material and organic electrochromic material.The Typical Representative of inorganic electrochromic material is tungstic acid, at present, and the electrochromic device industrialization made with tungstic acid; Organic electrochromic material mainly contains polythiophene class and derivant, purple sieve essence class, tetrathiafulvalene, metallo phthalocyanine and polyaniline compound compound etc., and the electrochromic material being wherein functional material with purple sieve essence class obtains practical application.
Existing electrochromic display panel needs the electrochromic material of three kinds of colors to realize colored display usually, comprise: red electrochromic material, green electrochromic material, and blue electrochromic material, above-mentioned red electrochromic material, green electrochromic material, there is redox reaction with blue electrochromic material respectively when being energized and present redness, green, and blue color states, the white incident light that backlight provides appears ruddiness through electrochromic display panel, green glow, and blue light, and different voltage can control the brightness of different colours light output, thus realize colored display, when no power, described red electrochromic material, green electrochromic material and blue electrochromic material are clear state.
Compared with display panels, existing electrochromic display panel has memory function, does not rely on the advantages such as visual angle, but its defect to realize black display, and due to the luminescence efficiency of red, green, blue three kinds of electrochromic materials inconsistent, cause drive more complicated.
Summary of the invention
The object of the present invention is to provide a kind of electrochromic display panel, colored display and black display can be realized, simplify display panel structure, reduce the thickness of display panel, promote the penetrance of display panel.
The present invention also aims to the method for making providing a kind of electrochromic display panel, can simplify the manufacture craft of display panel, obtained electrochromic display panel construction is simple, thickness is thin, penetrance is high, can realize colored display and black display.
For achieving the above object, the invention provides a kind of electrochromic display panel, comprising: array base palte, the color rete be located on described array base palte, the pixel electrode layer be located on described color rete, the electrochromic layer be located on described pixel electrode layer, the thin-film encapsulation layer being located at the common electrode layer on described electrochromic layer and being located in described common electrode layer;
Described electrochromic layer adopts black electrochromic material, and this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state.
Described array base palte comprises: underlay substrate, the insulating protective layer be located at the TFT layer on described underlay substrate and be located on described TFT layer;
Described underlay substrate has the several subpixel area be arranged in array, described TFT layer comprises several TFT of corresponding several subpixel area, and described TFT comprises: be located at the grid on described underlay substrate, the gate insulator be located on described grid and underlay substrate, the semiconductor layer be located on described gate insulator, be located at the source electrode and drain electrode that described gate insulator contact respectively described semiconductor layer both sides and be located at the etching barrier layer on semiconductor layer between source electrode and drain electrode.
Described color rete comprises red filter layer, green color filter and the blue color filter layer that corresponding several subpixel area sets gradually.
Described pixel electrode layer contacts with drain electrode with the via hole of insulating protective layer by running through described color rete.
Pixel segmentation layer is provided with between electrochromic layer corresponding to different subpixel region.
The present invention also provides a kind of method for making of electrochromic display panel, comprises the steps:
Step 1, provide array basal plate, described array base palte makes color rete;
Step 2, on described color rete, make pixel electrode layer;
Step 3, on described pixel electrode layer, make electrochromic layer, described electrochromic layer adopts black electrochromic material to make, this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state;
Step 4, on described electrochromic layer, cover common electrode layer, described common electrode layer makes thin-film encapsulation layer and encapsulates, form electrochromic display panel.
Described array base palte comprises: underlay substrate, the insulating protective layer be located at the TFT layer on described underlay substrate and be located on described TFT layer;
Described underlay substrate has several subpixel area of the arrangement in array, described TFT layer comprises several TFT of corresponding several subpixel area, and described TFT comprises: be located at the grid on described underlay substrate, the gate insulator be located on described grid and substrate, the semiconductor layer be located on described gate insulator, be located at the source electrode and drain electrode that described gate insulator contact respectively described semiconductor layer both sides and be located at the etching barrier layer on semiconductor layer between source electrode and drain electrode.
Described color rete comprises red filter layer, green color filter and the blue color filter layer that corresponding several subpixel area sets gradually.
Described pixel electrode layer contacts with drain electrode with the via hole of insulating protective layer by running through described color rete.
Described step 3 specifically comprises:
Step 31, on the color rete and pixel electrode layer in correspondence several different subpixel region, evaporation forms the pixel segmentation layer of patterning;
Step 32, in the space of described pixel segmentation layer evaporation fill electrochromic layer.
Beneficial effect of the present invention: a kind of electrochromic display panel provided by the invention, be provided with color rete and electrochromic layer, filtered by the backlight of color rete by backlight, described electrochromic layer adopts black electrochromic material, this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state, thus the transmitance of light can be controlled by changing the voltage be applied on electrochromic layer, realize colored many GTG displays and black display, combination film encapsulation can reduce the thickness of display panel again, simplify display panel structure, promote the penetrance of display panel, and this electrochromic display panel only adopts black electrochromic material, drive simpler.The present invention also provides a kind of method for making of electrochromic display panel, can simplify the manufacture craft of display panel, and obtained electrochromic display panel construction is simple, thickness is thin, penetrance is high, can realize colored display and black display.
In order to further understand feature of the present invention and technology contents, refer to following detailed description for the present invention and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention describe in detail, will make technical scheme of the present invention and other beneficial effect apparent.
In accompanying drawing,
Fig. 1 is the structural representation of electrochromic display panel of the present invention;
Fig. 2 is the sectional view of electrochromic display panel of the present invention;
Fig. 3 is the structural representation of the display device adopting electrochromic display panel of the present invention;
Fig. 4 is the process flow diagram of the method for making of electrochromic display panel of the present invention.
Embodiment
For further setting forth the technological means and effect thereof that the present invention takes, be described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
Please refer to Fig. 1 and Fig. 2, first the present invention provides a kind of electrochromic display panel, comprising: array base palte 11, the color rete 12 be located on described array base palte 11, the pixel electrode layer 13 be located on described color rete 12, the electrochromic layer 14 be located on described pixel electrode layer 13, the thin-film encapsulation layer 16 be located at the common electrode layer 15 on described electrochromic layer 14 and be located in described common electrode layer 15.Described electrochromic layer 14 adopts black electrochromic material, and this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state.
Described array base palte 11, color rete 12, pixel electrode layer 13 and common electrode layer 15 is identical with other structure of equivalent layer in traditional Thin Film Transistor-LCD (ThinFilmTransistor-LiquidCrystalDisplay, TFT-LCD).Described thin-film encapsulation layer 16 is for encapsulating electrochromic display panel, and the packaged type of this and organic light emitting diode display (OrganicLightEmittingDiode, OLED) is identical.
Particularly, as shown in Figure 2, described array base palte 11 comprises: underlay substrate 110, the insulating protective layer 112 be located at the TFT layer 111 on described underlay substrate 110 and be located on described TFT layer 111.Described underlay substrate 110 preferred glass substrate, the material of described insulating protective layer 112 can select monox, silicon nitride or the combination of the two.
Further, described underlay substrate 110 has several subpixel area 1101 of the arrangement in array, described TFT layer 111 comprises several TFT of corresponding several subpixel area 1101, described TFT comprises: be located at the grid 1110 on described underlay substrate 110, be located at the gate insulator 1111 on described grid 1110 and underlay substrate 110, be located at the semiconductor layer 1114 on described gate insulator 1111, be located at the source electrode 1112 and drain electrode 1113 that described gate insulator 1111 contact respectively described semiconductor layer 1114 both sides, and the etching barrier layer 1115 be located on semiconductor layer 1114 between source electrode 1112 and drain electrode 1113.
Described color rete 12 comprises red filter layer 121, green color filter 122 and the blue color filter layer 123 that corresponding several subpixel area 1101 sets gradually.Described pixel electrode layer 13 contacts with drain electrode 1113 with the via hole 131 of insulating protective layer 112 by running through described color rete 12.The material of described pixel electrode layer 13 and common electrode layer 15 is transparent tin indium oxide (IndiumTinOxide, ITO) film.
It is worth mentioning that, between the electrochromic layer 14 corresponding to different subpixel region 1101, be provided with pixel segmentation layer 141.
As shown in Figure 3, backlight 2 is set in the below of electrochromic display panel 1 of the present invention, forms electrochromic display device.Described backlight 2 can select white backlight source, and the white light that this backlight 2 sends is incident to electrochromic display panel 1, is separately converted to ruddiness, green glow and blue light through red filter layer 121, green color filter 122 and blue color filter layer 123.
By being energized to pixel electrode layer 13 and common electrode layer 15, the voltage applying different size on the electrochromic layer 14 can control the transparency of electrochromic layer 14, thus control transmitance and the brightness of ruddiness, green glow and blue light after transforming via color rete 12, realize colored many GTG displays, especially when putting on the voltage on electrochromic layer 14 and being enough large, electrochromic layer 14 state darkly, thus can black display be realized.Compared to traditional display panels, electrochromic display panel construction of the present invention is simple, the use of one deck glass substrate, two-layer Polarizer, liquid crystal layer and both alignment layers can be reduced by the setting of electrochromic layer 14 and thin-film encapsulation layer 16, greatly reduce the thickness of display panel, improve the penetrance of display panel, and this electrochromic display panel only adopts black electrochromic material, drive simpler.
Refer to Fig. 4, and composition graphs 1 and Fig. 2, the present invention also provides a kind of method for making of electrochromic display panel, comprises the steps:
Step 1, provide array basal plate 11, described array base palte 11 makes color rete 12.
Particularly; as shown in Figure 2; described array base palte 11 comprises: underlay substrate 110, the insulating protective layer 112 be located at the TFT layer 111 on described underlay substrate 110 and be located on described TFT layer 111; described underlay substrate 110 preferred glass substrate, the material of described insulating protective layer 112 can select monox, silicon nitride or the combination of the two.
Further, described underlay substrate 110 has the several subpixel area 1101 be arranged in array, described TFT layer 111 comprises several TFT of corresponding several subpixel area 1101, described TFT comprises: be located at the grid 1110 on described underlay substrate 110, be located at the gate insulator 1111 on described grid 1110 and underlay substrate 110, be located at the semiconductor layer 1114 on described gate insulator 1111, be located at the source electrode 1112 and drain electrode 1113 that described gate insulator 1111 contact respectively described semiconductor layer 1114 both sides, and the etching barrier layer 1115 be located on semiconductor layer 1114 between source electrode 1112 and drain electrode 1113.
Described color rete 12 comprises red filter layer 121, green color filter 122 and the blue color filter layer 123 that corresponding several subpixel area 1101 sets gradually.The white light of incidence can be separately converted to ruddiness, green glow and blue light by described red filter layer 121, green color filter 122 and blue color filter layer 123.
Step 2, on described color rete 12, make pixel electrode layer 13.
Particularly, the material of described pixel electrode layer 13 is ITO, and described pixel electrode layer 13 contacts with drain electrode 1113 with the via hole 131 of insulating protective layer 112 by running through described color rete 12.
Step 3, on described pixel electrode layer 13, make electrochromic layer 14, described electrochromic layer 14 adopts black electrochromic material to make, this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state.
Particularly, described step 3 comprises:
Step 31, on the color rete 12 and pixel electrode layer 13 in correspondence several different subpixel region 1101, evaporation forms the pixel segmentation layer 141 of patterning.
Step 32, in the space of described pixel segmentation layer 141 evaporation fill electrochromic layer 14.
Step 4, on described electrochromic layer 14, cover common electrode layer 15, described common electrode layer 15 makes thin-film encapsulation layer 16 and encapsulates, form electrochromic display panel 1.
Particularly, the material of described common electrode layer 15 is ITO.
Through the electrochromic display panel that the method for making of above-mentioned electrochromic display panel is obtained, by being energized to pixel electrode layer 13 and common electrode layer 15, the voltage applying different size on the electrochromic layer 14 can control the transparency of electrochromic layer 14, thus control transmitance and the brightness of ruddiness, green glow and blue light after transforming via color rete 12, realize colored many GTG displays, especially when putting on the voltage on electrochromic layer 14 and being enough large, electrochromic layer 14 state darkly, thus can black display be realized.Compared to traditional display panels, the electrochromic display panel construction that the method obtains is simple, the use of one deck glass substrate, two-layer Polarizer, liquid crystal layer and both alignment layers can be reduced, greatly reduce the thickness of display panel, improve the penetrance of display panel, and this electrochromic display panel only adopts black electrochromic material, drive simpler.
In sum, electrochromic display panel of the present invention, be provided with color rete and electrochromic layer, filtered by the backlight of color rete by backlight, described electrochromic layer adopts black electrochromic material, this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state, thus the transmitance of light can be controlled by changing the voltage be applied on electrochromic layer, realize colored many GTG displays and black display, combination film encapsulation can reduce the thickness of display panel again, simplify display panel structure, promote the penetrance of display panel, and this electrochromic display panel only adopts black electrochromic material, drive simpler.The method for making of electrochromic display panel of the present invention, can simplify the manufacture craft of display panel, and obtained electrochromic display panel construction is simple, thickness is thin, penetrance is high, can realize colored display and black display.
The above, for the person of ordinary skill of the art, can make other various corresponding change and distortion according to technical scheme of the present invention and technical conceive, and all these change and be out of shape the protection domain that all should belong to the claims in the present invention.
Claims (10)
1. an electrochromic display panel, it is characterized in that, comprising: array base palte (11), the color rete (12) be located on described array base palte (11), the pixel electrode layer (13) be located on described color rete (12), the electrochromic layer (14) be located on described pixel electrode layer (13), the thin-film encapsulation layer (16) being located at the common electrode layer (15) on described electrochromic layer (14) and being located in described common electrode layer (15);
Described electrochromic layer (14) adopts black electrochromic material, and this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state.
2. electrochromic display panel as claimed in claim 1, it is characterized in that, described array base palte (11) comprising: underlay substrate (110), the insulating protective layer (112) be located at the TFT layer (111) on described underlay substrate (110) and be located on described TFT layer (111);
Described underlay substrate (110) has several subpixel area (1101) of the arrangement in array, described TFT layer (111) comprises several TFT of corresponding several subpixel area (1101), described TFT comprises: be located at the grid (1110) on described underlay substrate (110), be located at the gate insulator (1111) on described grid (1110) and underlay substrate (110), be located at the semiconductor layer (1114) on described gate insulator (1111), be located at the source electrode (1112) and drain electrode (1113) that described gate insulator (1111) contact respectively described semiconductor layer (1114) both sides, and be located at the etching barrier layer (1115) semiconductor layer (1114) is positioned between source electrode (1112) and drain electrode (1113).
3. electrochromic display panel as claimed in claim 2, it is characterized in that, described color rete (12) comprises red filter layer (121), green color filter (122) and the blue color filter layer (123) that corresponding several subpixel area (1101) sets gradually.
4. electrochromic display panel as claimed in claim 2; it is characterized in that, described pixel electrode layer (13) contacts with drain electrode (1113) with the via hole (131) of insulating protective layer (112) by running through described color rete (12).
5. electrochromic display panel as claimed in claim 2, is characterized in that, be provided with pixel segmentation layer (141) between the electrochromic layer (14) corresponding to different subpixel region (1101).
6. a method for making for electrochromic display panel, is characterized in that, comprises the steps:
Step 1, provide array basal plate (11), make color rete (12) described array base palte (11) is upper;
Step 2, on described color rete (12), make pixel electrode layer (13);
Step 3, on described pixel electrode layer (13), make electrochromic layer (14), described electrochromic layer (14) adopts black electrochromic material to make, this black electrochromic material is clear state when not powering up, when powering up along with the increasing of voltage changes black state into gradually by clear state;
Step 4, on described electrochromic layer (14), cover common electrode layer (15), described common electrode layer (15) makes thin-film encapsulation layer (16) encapsulate, form electrochromic display panel (1).
7. the method for making of electrochromic display panel as claimed in claim 6, it is characterized in that, described array base palte (11) comprising: underlay substrate (110), the insulating protective layer (112) be located at the TFT layer (111) on described underlay substrate (110) and be located on described TFT layer (111);
Described underlay substrate (110) has several subpixel area (1101) of the arrangement in array, described TFT layer (111) comprises several TFT of corresponding several subpixel area (1101), described TFT comprises: be located at the grid (1110) on described underlay substrate (110), be located at the gate insulator (1111) on described grid (1110) and underlay substrate (110), be located at the semiconductor layer (1114) on described gate insulator (1111), be located at the source electrode (1112) and drain electrode (1113) that described gate insulator (1111) contact respectively described semiconductor layer (1114) both sides, and be located at the etching barrier layer (1115) semiconductor layer (1114) is positioned between source electrode (1112) and drain electrode (1113).
8. the method for making of electrochromic display panel as claimed in claim 7, it is characterized in that, described color rete (12) comprises red filter layer (121), green color filter (122) and the blue color filter layer (123) that corresponding several subpixel area (1101) sets gradually.
9. the method for making of electrochromic display panel as claimed in claim 7; it is characterized in that, described pixel electrode layer (13) contacts with drain electrode (1113) with the via hole (131) of insulating protective layer (112) by running through described color rete (12).
10. the method for making of electrochromic display panel as claimed in claim 7, it is characterized in that, described step 3 specifically comprises:
Step 31, form the pixel segmentation layer (141) of patterning at the color rete (12) of correspondence several different subpixel region (1101) and the upper evaporation of pixel electrode layer (13);
Step 32, in the space of described pixel segmentation layer (141) evaporation fill electrochromic layer (14).
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Application publication date: 20160127 |