CN101930143B - Electronic ink display panel and forming method thereof - Google Patents
Electronic ink display panel and forming method thereof Download PDFInfo
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- CN101930143B CN101930143B CN200910054059.8A CN200910054059A CN101930143B CN 101930143 B CN101930143 B CN 101930143B CN 200910054059 A CN200910054059 A CN 200910054059A CN 101930143 B CN101930143 B CN 101930143B
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- 238000001514 detection method Methods 0.000 claims abstract description 44
- 239000011521 glass Substances 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 239000010409 thin film Substances 0.000 claims abstract description 5
- 230000006698 induction Effects 0.000 claims description 33
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- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 6
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
An electronic ink display panel and a forming method thereof. The electronic ink display panel comprises the following components in sequence from bottom to top: the touch display device comprises a glass substrate, a thin film transistor layer, an electronic ink layer, a working layer and a protective layer of capacitive touch display, wherein the working layer shares a common electrode layer of the electronic ink display panel. The electronic ink display panel integrates a capacitive touch screen, and the electronic ink display panel is simple in forming process, has better touch detection performance and longer service life; in addition, the thickness of the display screen is not increased, and the light transmittance and the contrast of the display are not influenced.
Description
Technical field
The present invention relates to display field, more particularly to electronic ink display panel and forming method thereof.
Background technology
Electrophoresis-type display screen is a kind of non-luminescent flat-panel display devices, it makes use of colloidal dispersions particle under electric field action
Occur the principle of swimming, advantage is that contrast is high, visual angle is wide, low energy consumption, display brightness are high, cheap.Electric ink (E-
Ink) display is that charged pigment particles are dispersed in suspension electrolyte, then utilizes Transparent microcapsule cladding suspension electrolysis
Matter, makes charged pigment particles electrophoresis by extra electric field, and information is shown by reflecting.
Fig. 1 shows a kind of structure of existing electronic ink display panel, sequentially includes from the bottom to top：Glass substrate
101st, thin film transistor (TFT) (TFT) layer 102, electronic ink layer 103, tin indium oxide (ITO) layer 104 and protective layer 105, wherein, oxygen
Change the common electrode layer that indium tin (ITO) layer 104 is electronic ink display panel.Electronic ink layer 103 includes multiple transparent micro- glue
Capsule 103a, each Transparent microcapsule 103a cladding suspension electrolyte 103b and it is dispersed in multiple in suspension electrolyte 103b
Charged pigment particles 103c, (electric field between such as pixel electrode and public electrode changes), band under DC Electric Field
Electric granules of pigments electrophoresis, the color of pixel display variable grain is made by reflection.
Touch-screen has resistance-type, condenser type, surface acoustic wave type, infrared type etc. as a kind of interface of user interactive
Deng.Generally, the electric ink display screen with touch function can be that touch-screen and electric ink display screen is separately manufactured so
The thickness of electric ink display screen certainly will so be increased together by being made afterwards by way of assembling, if due to adding dried layer
Transparent glass or film, display transparent rate and contrast can be also decreased obviously.Also, this way formation process is more complicated,
Cost is also higher.
Electric ink display screen can be provided as a kind of new Display Technique, integrated touch screen in the surface of display screen
More preferable user interactivity, and do not increase the volume of display screen.
The existing touch-screen for being integrated in electric ink display screen is substantially resistance-type, such as United States Patent (USP)
US20080137177 discloses a kind of electric ink display screen of integrated resistor formula touch-screen, glass and lower floor's glass on upper strata
Between be provided with contact induction device, when finger is depressed, the sensing contact point of upper strata glass is contacted with lower floor, causes touch points
Voltage change, contact induction device spread out of corresponding electric signal, by the electric signal that detects come the position of detected touch point.It is this
The electric ink display screen of integrated resistor formula touch-screen is mutual due to form sensing in the electronic ink layer between layer glass
Company and contact induction device, therefore formation process is more complicated.
The content of the invention
It is existing with tactile to solve the object of the present invention is to provide a kind of electronic ink display panel and forming method thereof
Touch function electric ink display screen formation process it is more complicated the problem of.
To solve the above problems, embodiment of the present invention provides a kind of electronic ink display panel, including capacitance touch
The working lining of display, the working lining share the common electrode layer of the electronic ink display panel.
Optionally, the electronic ink display panel further includes the conductive layer being arranged in the common electrode layer, described
The working lining that conductive layer is shown as capacitance touch.
Optionally, the electronic ink display panel further includes the selection common electrode layer or conductive layer as condenser type
Touch the switch switching unit of the working lining of display.
Optionally, the working lining includes multiple touch controlled keys and the corresponding button line for connecting the touch controlled key.
Optionally, the electronic ink display panel further includes multi-path choice module and detection circuit, the button line
It is connected by multi-path choice module with detection circuit.
Optionally, the working lining has even resistance.
Optionally, the electronic ink display panel further includes the detection circuit for the apex angle electric current for detecting the working lining.
Optionally, the working lining includes the driving layer and inductive layer of mutually insulated, described and electronic ink display panel
The working lining that shares of common electrode layer be driving layer, the driving layer includes a plurality of parallel drives line, the inductive layer bag
Include a plurality of line of induction vertical with the drives line.
Optionally, the drives line includes multiple first figures and connects the first connecting portion of first figure, described
The line of induction includes multiple second graphs and connects the second connecting portion of the second graph, the second connecting portion and the first connection
Portion's face overlaps, and the second graph and the first figure mutually stagger.
Optionally, the electronic ink display panel further includes detection circuit, and the detection circuit includes drive end and inspection
Survey end, the drive end connection of the drives line and detection circuit, the test side connection of the line of induction and detection circuit.
Optionally, the electronic ink display panel further includes the protective layer being arranged on the inductive layer.
Optionally, the working lining that the capacitance touch is shown is indium tin oxide layer or IZO layer.
Optionally, the electronic ink display panel further includes the protective layer being arranged in the common electrode layer.
Optionally, the electronic ink display panel further includes the guarantor being arranged between the common electrode layer and conductive layer
Sheath.
Optionally, the electronic ink display panel further includes the protective layer being arranged on the conductive layer.
To solve the above problems, embodiment of the present invention also provides a kind of forming method of electronic ink display panel, bag
Include：Form the working lining that the capacitance touch shared with the common electrode layer of the electronic ink display panel is shown.
Optionally, the forming method of the electronic ink display panel also includes being formed in the common electrode layer conductive
Layer, the working lining that the conductive layer is shown as capacitance touch.
Optionally, the forming method of the electronic ink display panel further includes the connection common electrode layer and conductive layer
To switch switching unit, the work shown by switch switching unit selection common electrode layer or conductive layer as capacitance touch
Layer.
Optionally, the work that the capacitance touch shared with the common electrode layer of the electronic ink display panel is shown is formed
Include as layer：The common electrode layer is etched, forms multiple touch controlled keys and the corresponding button line for connecting the touch controlled key.
Optionally, the forming method of the electronic ink display panel further include by the connection of multi-path choice module it is described by
Key links to detection circuit.
Optionally, the working lining has even resistance.
Optionally, the forming method of the electronic ink display panel further includes the apex angle extremely detection for connecting the working lining
Circuit.
Optionally, the work that the capacitance touch shared with the common electrode layer of the electronic ink display panel is shown is formed
Include as layer：
The common electrode layer is etched, forms a plurality of parallel drives line；
Insulating layer is formed on the driving layer；
Inductive layer is formed on the insulating layer；
The inductive layer is etched, forms a plurality of line of induction vertical with the drives line.
Optionally, the common electrode layer is etched, a plurality of parallel drives line of formation, which is included in the drives line, to be formed
Multiple first figures and the first connecting portion for connecting first figure；The inductive layer is etched, forms a plurality of and driving
The vertical line of induction of line is included in the second connection that multiple second graphs are formed on the line of induction and connect the second graph
Portion, second connecting portion and the first connecting portion face overlap, and the second graph and the first figure mutually stagger.
Optionally, the forming method of the electronic ink display panel further includes the connection drives line to detection circuit
Drive end, connects the line of induction to the test side of detection circuit.
Optionally, the forming method of the electronic ink display panel also includes forming protective layer on the inductive layer.
Optionally, the forming method of the electronic ink display panel also includes forming protection in the common electrode layer
Layer.
Optionally, the forming method of the electronic ink display panel be additionally included in the common electrode layer and conductive layer it
Between form protective layer.
Optionally, the forming method of the electronic ink display panel also includes forming protective layer on the conductive layer.
Compared with prior art, above-mentioned technical proposal has the following advantages：Capacitance touch is formed in electronic ink layer
The working lining of display, the working lining share the common electrode layer of the electronic ink display panel, integrated compared to existing
For the electric ink display screen of resistive touch screen, formation process is simpler, and with more preferable touch detection performance and
Longer service life；Compared to it is existing electric ink display screen and touch-screen are fitted together for, can not increase
The thickness of display screen, and the light transmittance and contrast of display are not influenced.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of existing electronic ink display panel；
Fig. 2 is one embodiment structure diagram of electronic ink display panel of the present invention；
Fig. 3 is the example structure schematic diagram of the working lining of the electronic ink display panel shown in Fig. 2；
Fig. 4 is the schematic equivalent circuit of the working lining of the electronic ink display panel shown in Fig. 3；
Fig. 5 is one embodiment flow chart to form the electronic ink display panel shown in Fig. 2；
Fig. 6 is another example structure schematic diagram of electronic ink display panel of the present invention；
Fig. 7 is the example structure schematic diagram of the driving layer of the electronic ink display panel shown in Fig. 6；
Fig. 8 is the example structure schematic diagram of the inductive layer of the electronic ink display panel shown in Fig. 6；
Fig. 9 is the driving layer of the electronic ink display panel shown in Fig. 7 and 8 and the schematic equivalent circuit of inductive layer；
Figure 10 is one embodiment flow chart to form the electronic ink display panel shown in Fig. 6；
Figure 11 is another example structure schematic diagram of electronic ink display panel of the present invention；
Figure 12 is one embodiment flow chart to form the electronic ink display panel shown in Figure 11；
Figure 13 is the equivalent circuit diagram of one embodiment of the working lining of electronic ink display panel shown in Figure 11；
Figure 14 is another embodiment flow chart to form the electronic ink display panel shown in Figure 11.
Embodiment
The capacitance touch that the electronic ink display panel of embodiment of the present invention includes being arranged in electronic ink layer is shown
The working lining shown, i.e., be integrated in electronic ink display panel surface, the work that the capacitance touch is shown by capacitive touch screen
Make the common electrode layer of layer shared electron ink display panel.Embodiments of the present invention are done with reference to the accompanying drawings and examples
Detailed description.
Embodiment 1
The structure of the electronic ink display panel of the present embodiment as shown in Fig. 2, sequentially include from bottom to up：Glass substrate
201st, the working lining 204 and protective layer 205 that tft layer 202, electronic ink layer 203, capacitance touch are shown.Wherein,
The working lining 204 that capacitance touch is shown and the common electrode layer 204 as electronic ink display panel, it can be indium oxide
Tin layers or indium zinc oxide (IZO) layer.
Tft layer 202 is located on glass substrate 201, including multiple thin film transistor (TFT)s, in addition, glass substrate 201
On be also configured with multi-strip scanning line, a plurality of data lines and multiple pixel electrode (not shown)s.Each thin film transistor (TFT) with
Corresponding scan line, data cable and pixel electrode are electrically connected.
Electronic ink layer 203 includes multiple Transparent microcapsule 203a, each Transparent microcapsule 203a claddings suspension electrolysis
The matter 203b and multiple charged pigment particles 203c being dispersed in suspension electrolyte 203b, (such as picture under DC Electric Field
Electric field between plain electrode and public electrode changes), charged pigment particles electrophoresis, makes different of pixel display by reflection
The color of grain.The form of electric ink be not limited to it is foregoing refer to, structure of the embodiment of the present invention for electronic ink layer 203
It is not limited.
Protective layer 205, for protecting working lining (common electrode layer) 204, protective layer 205 can be that glass can or other
The insulating dielectric materials of energy.
In the present embodiment, capacitance touch is shown as self-capacitance, specifically, as shown in figure 3, capacitance touch is shown
Working lining 301 (working lining 204 i.e. shown in Fig. 2), including multiple touch controlled keys 302 and corresponding connect the touch controlled key
302 button line 303.
Working lining 301 can be divided into several touch controlled keys 302, each touch controlled key for example, by the method for etching
302 correspond to a button line 303.Button line 303 can be tin indium oxide striped, can for example, by etching method with
Touch controlled key 302 is together formed.
The shape of touch controlled key 302 is not limited to square shown in Fig. 3 or such as circle, rectangle, ellipse
The other shapes such as circle, triangle, diamond shape, parallelogram, square, and the shapes and sizes of each touch controlled key can phase
Together can not also be same.Such as, part touch controlled key is circular, and part button is square；Part button is compared with big key, part button
It is the smaller button of relatively large button.Also, the arrangement mode of touch controlled key 302 is also not limited to shown in Fig. 3, also may be used
Using other conventional arrangement modes.The distribution density of the touch controlled key can uniformly can not also be uniform, be specifically distributed feelings
Condition is arranged as required to.
The button line 303 of each touch controlled key 302 is connected to detection circuit 306, multichannel by multi-path choice module 305
Selecting module 305 and detection circuit 306 can be formed on working lining 301, can also be formed in electronic ink display panel
On other layers, or the circuit outside electronic ink display panel can also be formed in.
The equivalent circuit of working lining 301 shown in Fig. 3 is as shown in figure 4, wherein, capacitance 403 is that touch controlled key 302 arrives ground
Parasitic capacitance, variable capacitance 404 are the parasitic capacitances that finger is produced by touch controlled key 302, and resistance 405 is 302 He of touch controlled key
Total equivalent resistance of button line 303.With reference to Fig. 3 and Fig. 4, the self-capacitance touch control detection principle of the present embodiment is as described below：
Detection circuit 306 produces drive signal (sine wave or pulse square wave signal) 401, is detected successively by multi-path choice module 305
The button line 303 of each touch controlled key 302, when there is finger to touch touch controlled key 302, corresponding variable capacitance 404 occurs
Change so that the electric current of the button line for the touch controlled key that connection is touched changes, the signal detection end of detection circuit 306
402 detect the change of electric current I, whereby it can be detected that the position of the touch controlled key touched.
The flow chart of the forming method of the present embodiment electronic ink display panel is as shown in figure 5, with reference to Fig. 2 and Fig. 5, this reality
Applying the forming method for the electronic ink display panel that example integrates self-capacitance touch screen includes：
Step S11, there is provided glass substrate 201.
Step S12, tft layer 202 and electronic ink layer 203 are sequentially formed on the glass substrate 201.
Step S13, forms common electrode layer 204, the common electrode layer is as capacitance in the electronic ink layer 203
Formula touches the working lining of display.
Step S14, etches the working lining (common electrode layer) 204, is formed described in multiple touch controlled keys and corresponding connection
The button line of touch controlled key.Simple example explanation is made to the etching process of working lining 204 herein, but is not intended to limit the mistake
Journey：First, photoresist layer is formed on the working lining 204；Then, through overexposure, development so that photoresist layer is formed such as Fig. 3 institutes
Show touch controlled key arrangement and button line figure；Then, using the photoresist layer as mask, the working lining 204 is etched, forms figure
The working lining 301 that self-capacitance touch-control shown in 3 is shown.The button line of touch controlled key is connected to inspection by multi-path choice module
Slowdown monitoring circuit.
Step S15, forms protective layer 205 on the working lining (common electrode layer) 204.
The common electrode layer of working lining and electronic ink display panel that the self-capacitance of the present embodiment touches display shares,
Touch function is realized on existing electronic ink display panel, therefore need not additionally increase any layer.This shared knot
Structure realizes touch function while electronic ink display panel is manufactured, so as to reduce processing step, reduces cost, and
And integrated level is improved, realize thinner structure.Further, since the response speed of electric ink display screen is slow (generally
100-150ms), far below the driving frequency (generally 100KHz) of touch-screen, therefore this sharing structure does not interfere with electronics
The display of ink display screen.
Embodiment 2
The capacitance touch of the present embodiment is shown as mutual capacitance type, its implementation needs two layers of working lining, including driving
Layer and inductive layer, the detection of capacitance touch is realized using the mutual capacitance formed between two layers of working lining.
The structure of the electronic ink display panel of the present embodiment as shown in fig. 6, sequentially include from bottom to up：Glass substrate
601st, tft layer 602, electronic ink layer 603, capacitance touch are shown driving layer 604, insulating layer 605, condenser type
Touch the inductive layer 606 and protective layer 607 of display.Wherein, the driving layer 604 that capacitance touch is shown is shown as electric ink again
Show the common electrode layer of panel, driving layer (common electrode layer) 604 and inductive layer 606 can be indium tin oxide layer and indium zinc oxide
Layer.
Illustrate to simplify, this will not be repeated here for the same or similar structure, and only capacitance touch is shown herein
Working lining (driving layer and inductive layer) and its testing principle illustrate.In the present embodiment, driving layer (common electrode layer) 604
It is oppositely arranged with inductive layer 606, centre is additionally provided with insulating layer 605, and driving layer 604 includes a plurality of parallel drives line, senses
Layer 606 includes a plurality of line of induction vertical with the drives line, and the insulation of the point of intersection and centre of drives line and the line of induction is situated between
Matter forms mutual capacitance.
In the present embodiment, also there are multiple first figures in the drives line and connect the first of first figure and connect
Socket part, the area of first connecting portion are less than the first figure；Also there are multiple second graphs on the line of induction and connect described the
The second connecting portion of two figures, the area of second connecting portion are less than second graph；Second graph mutually staggers with the first figure, the
Two connecting portions are overlapped with first connecting portion face.The first connecting portion and second connecting portion and the insulation of centre that face overlaps are situated between
Matter forms mutual capacitance.
The figure as shown in the working lining 701 of Fig. 7 is formed on driving layer 604 for example, by the method for etching, is being sensed
The figure as shown in the working lining 702 of Fig. 8 is formed on layer 606.Specifically, driving layer 701 includes a plurality of vertical drives line,
Every drives line includes multiple first connecting portion 701a and the first figure 701b, first connecting portion 701a connect the first figure 701b
It is connected together, forms drives line.The area of first connecting portion 701a is less than the first figure 701b, for example, first connecting portion 701a
It can be tin indium oxide striped, can together be formed with the first figure 701b for example, by the method for etching.Drive signal is added in
One end 701c of drives line.Inductive layer 702 includes a plurality of horizontal line of induction, and every line of induction includes multiple second connecting portions
702a and multiple second graph 702b, second connecting portion 702a link together second graph 702b, form the line of induction.Second
The area of connecting portion 702a is less than second graph 702b, for example, second connecting portion 702a can be tin indium oxide striped, Ke Yitong
The method and second graph 702b for crossing such as etching are together formed.One end 702c of the line of induction is test side.
In other embodiments, driving layer 604 can also be etched into the figure as shown in the working lining 702 of Fig. 8, corresponding
Ground, inductive layer are then etched into the figure as shown in the working lining 701 of Fig. 7.
First figure, the shape of second graph be not limited to the diamond shape shown in Fig. 7 and 8 or such as rectangle,
The other shapes such as square, regular hexagon, relative to other shapes, diamond shape connection has less connection resistances.First figure
It can be set with the distribution density of second graph according to being actually needed.
As shown in FIG. 7 and 8, when driving one end 701c of a drives line of layer 701 to add drive signal, remaining driving
Line is all grounded, then inductive layer 702 every line of induction one end 702c change in detection signal.When there is finger touch,
The test side 702c of line of induction 702a can detect corresponding charge variation, according to specifically scan be which bar drives line and
Detect the line of induction of corresponding charge variation, it is possible to determine the specific location touched.
The equivalent circuit of the inductive layer shown in driving layer and Fig. 8 shown in Fig. 7 is as shown in figure 9, wherein, capacitance 902 is to drive
Moving-wire is to the parasitic capacitance on ground, and capacitance 903 is to drive layer 701 and 702 face of inductive layer to overlap the mutual capacitance at place, and capacitance 904 is
The equivalent capacity that finger touches, capacitance 906 are parasitic capacitance of the line of induction to ground, and resistance 907 is the equivalent resistance of drives line, electricity
Resistance 908 is the equivalent resistance of the line of induction.With reference to Fig. 7,8 and Fig. 9, the following institute of mutual capacitance type touch control testing principle of the present embodiment
State：The drive signal (sine wave or pulse square wave signal) 901 that the drive end of detection circuit produces is added in one end of drives line
701c, when there is finger touch (equivalent to the closure of switch 909) so that the output current I that the test side of detection circuit detects
Amplitude diminish, the voltage Vout of the output terminal of tesing and switching circuit 905 diminishes, and therefore, can be detected by detection circuit
The curent change of one end (test side) 702c of the corresponding line of induction, whereby it can be detected that the position touched.
When there is multiple point touching, corresponding position can be detected at the same time, because the detection mode of mutual capacitance is to sweep line by line
Drives line is retouched, when scanning is to a drives line, detects each bar line of induction, therefore can tell while the reality of multiple touch points
Border position.
The flow chart of the forming method of the present embodiment electronic ink display panel is as shown in Figure 10, with reference to Fig. 6 and Figure 10, sheet
The forming method that embodiment integrates the electronic ink display panel of mutual capacitance type touch screen includes：
Step S21, there is provided glass substrate 601.
Step S22, tft layer 602 and electronic ink layer 603 are sequentially formed on the glass substrate 601.
Step S23, forms common electrode layer 604, the common electrode layer is as capacitance in the electronic ink layer 603
Formula touches the driving layer of display.
Step S24, etches the driving layer (common electrode layer) 604, forms a plurality of drives line, have in the drives line
Multiple first figures and the first connecting portion for connecting first figure.Simple lift is made to the etching process for driving layer 604 herein
Example explanation, but it is not intended to limit the process：First, photoresist layer is formed on the driving layer 604；Then, through overexposure, aobvious
Shadow so that photoresist layer forms lozenge diagram arrangement and driving line graph as shown in the working lining 701 of Fig. 7；Then, with the photoresist
Layer is mask, etches the driving layer 604, forms the driving layer 701 that the mutual capacitance type touch control shown in Fig. 7 is shown.Drives line connects
It is connected to the drive end of detection circuit.
Step S25, insulating layer 605 is formed on the driving layer (common electrode layer) 604.
Step S26, forms inductive layer 606 on the insulating layer 605.
Step S27, etches the inductive layer 606, forms a plurality of line of induction, has multiple second graphs on the line of induction
With the second connecting portion for connecting the second graph, second connecting portion and the first connecting portion face overlaps, second figure
Shape and the first figure mutually stagger.Simple example explanation is made to the etching process of inductive layer 606 herein, but is not intended to limit this
Process：First, photoresist layer is formed on the inductive layer 606；Then, through overexposure, development so that photoresist layer forms such as Fig. 8
Working lining 702 shown in lozenge diagram arrangement and sensing line graph；Then, using the photoresist layer as mask, the sensing is etched
Layer 606, forms the work inductive layer 702 that the mutual capacitance type touch control shown in Fig. 8 is shown.The line of induction is connected to the detection of detection circuit
End.
Step S28, forms protective layer 607 on the inductive layer 606.
The mutual capacitance type of the present embodiment touches the working lining (driving layer) of display and the common electrical of electronic ink display panel
Pole layer share, therefore need to only be further added by one layer of working lining (inductive layer) can be realized on electronic ink display panel touch work(
Energy.This sharing structure reduces processing step, reduces cost, and improves integrated level, realizes thinner structure.Separately
Outside, since the response speed of electric ink display screen is slow (generally 100-150ms), far below the driving frequency (one of touch-screen
As be 100KHz), therefore this sharing structure does not interfere with the display of electric ink display screen.
Embodiment 3
The structure of the electronic ink display panel of the present embodiment is as shown in figure 11, sequentially includes from bottom to up：Glass substrate
111st, tft layer 112, electronic ink layer 113, common electrode layer 114, the first protective layer 115, conductive layer 116 and second
Protective layer 117.Wherein, common electrode layer 114 and conductive layer 116 can be as the working lining that capacitance touch is shown, common electricals
Pole layer 114 and conductive layer 116 can be indium tin oxide layer or IZO layer.
Illustrate to simplify, this will not be repeated here for the same or similar structure, herein only to common electrode layer 114 and leading
Electric layer 116 illustrates.The capacitance touch of the present embodiment is shown as self-capacitance, and therefore, common electrode layer 114 is as electricity certainly
The working lining that appearance formula touches display is etched to figure as shown in Figure 3, including multiple touch controlled keys connect described touch with corresponding
The button line of button is controlled, the equivalent circuit of the working lining is as shown in figure 4, its testing principle is same as Example 1.Conductive layer
116 working linings that display is touched as self-capacitance are etched to figure as shown in Figure 3, including multiple touch controlled keys and correspondence
The button line of the touch controlled key is connected, the equivalent circuit of the working lining is as shown in figure 4, its testing principle and embodiment 1
It is identical.
Compared to embodiment 1, the present embodiment adds one layer again can leading as the working lining that capacitance touch is shown
Electric layer 116.Common electrode layer 114 or conductive layer 116 is selected to be used as what capacitance touch was shown by a switch switching unit
Working lining.Switch switching unit can be formed in common electrode layer 114 or on conductive layer 116, can also be formed in electronics
On other layers of ink display panel, or the circuit outside electronic ink display panel can also be formed in.
The flow chart of the forming method of the present embodiment electronic ink display panel is as shown in figure 12, with reference to Figure 11 and Figure 12,
The forming method that the present embodiment integrates the electronic ink display panel of self-capacitance touch screen includes：
Step S31, there is provided glass substrate 111.
Step S32, sequentially forms tft layer 112, electronic ink layer 113 and public affairs on the glass substrate 111
Common electrode layer 114.
Step S33, etches the common electrode layer 114, forms multiple touch controlled keys and the corresponding connection touch controlled key
Button line.Common electrode layer is connected to switch switching unit, and the button line of touch controlled key is connected by multi-path choice module
It is connected to detection circuit.
Step S34, forms the first protective layer 115 in the common electrode layer 114.
Step S35, forms conductive layer 116 on first protective layer 115.
Step S36, etches the conductive layer 116, forms multiple touch controlled keys and corresponds to pressing for the connection touch controlled key
Key line.Conductive layer is connected to switch switching unit, and the button line of touch controlled key is connected to detection by multi-path choice module
Circuit.
Step S37, forms the second protective layer 117 on the conductive layer 116.
Self-capacitance touch screen is integrated in electronic ink display panel by the present embodiment, and self-capacitance touches the work of display
Layer can show capacitance touch with the common electrode layer of shared electron ink display panel or independent conductive layer
The working lining shown backs up, thus adds the flexibility used.
Embodiment 4
The structure of the electronic ink display panel of the present embodiment is substantially the same manner as Example 3, unlike, embodiment 3 is
Self-capacitance touches display, and the present embodiment is surface capacitance type touch display, and therefore, the capacitance touch of the present embodiment is shown
Working lining there is uniform resistance.
The structure of the electronic ink display panel of the present embodiment is as shown in figure 11, sequentially includes from bottom to up：Glass substrate
111st, tft layer 112, electronic ink layer 113, common electrode layer 114, the first protective layer 115, conductive layer 116 and second
Protective layer 117.Wherein, common electrode layer 114 and conductive layer 116 can be as the working lining that capacitance touch is shown, common electricals
Pole layer 114 and conductive layer 116 can be indium tin oxide layer or IZO layer.
Illustrate to simplify, this will not be repeated here for the same or similar structure, herein only to common electrode layer 114 and leading
Electric layer 116 and its testing principle illustrate.In the present embodiment, capacitance touch is shown as surface capacitance type, specifically, public
Common electrode layer 114 and conductive layer 116 have an even resistance, conductive layer 116 can be one layer do not have figuratum indium tin oxide layer or
IZO layer, it is not necessary to perform etching.By switch switching unit common electrode layer 114 or conductive layer 116 can be selected to make
The working lining shown for capacitance touch.Apply drive signal in four apex angles of working lining, while detect the electricity of four apex angles
Stream can detect touch location.
Figure 13 is the equivalent circuit for the working lining that the present embodiment capacitance touch is shown, which employs surface capacitance type touch-control
Testing principle, it is described in detail below：When finger touch working lining 131, between the working lining and finger of finger touch position just etc.
Imitate as the capacitance C of a ground connection, therefore a turning circuit is formed from AC power 132 to finger, so as to generate electricity
Stream.Resistance R1, R2, R3 between the electric current I1, I2, I3, I4 and touch point P to four apex angle of generation, R4 are inversely proportional, and this four
A resistance R1, R2, R3, the value of R4 again with touch point P to upper left corner UL, upper right corner UR, lower left corner LL, the distance of lower right corner LR into
Direct ratio, therefore by detecting electric current I1, I2, I3, I4 on four apex angles, it is possible to determine the touch location P of finger.
The flow chart of the forming method of the present embodiment electronic ink display panel is as shown in figure 14, with reference to Figure 11 and Figure 14,
The forming method that the present embodiment integrates the electronic ink display panel of surface capacitance type touch screen includes：
Step S41, there is provided glass substrate 111.
Step S42, sequentially forms tft layer 112, electronic ink layer 113, public on the glass substrate 111
114 and first protective layer 115 of electrode layer, the common electrode layer 114 have uniform resistance.Common electrode layer connecting valve is cut
Unit is changed, four apex angles of common electrode layer are connected to detection circuit.
Step S43, forms conductive layer 116 on first protective layer 115, and the conductive layer 116 has uniform electricity
Resistance.Conductive layer connecting valve switch unit, four apex angles of conductive layer are connected to detection circuit.
Step S44, forms the second protective layer 117 on the conductive layer 116.
Surface capacitance type touch screen is integrated in electronic ink display panel by the present embodiment, and surface capacitance type touches display
Working lining can be with the common electrode layer of shared electron ink display panel or independent conductive layer, to capacitance touch
The working lining of display backs up, thus adds the flexibility used.Since conductive layer need not perform etching, thus simplify
Technique.
In conclusion the electronic ink display panel of the integrated capacitive touch screen of above-described embodiment, in electronic ink layer
The upper working lining for forming capacitance touch and showing, the working lining and the public affairs of electronic ink display panel that the capacitance touch is shown
Common electrode layer shares, and for the electric ink display screen of existing integrated resistor formula touch-screen, formation process is simpler,
And there is more preferable touch detection performance and longer service life；Compared to existing by electric ink display screen and capacitance
For formula touch-screen fits together, the thickness of display screen can not be increased, and do not influence the light transmittance and contrast of display.
Further, since to the electric field sum of zero of the drive signal (sine wave or pulse square wave signal) added by touch-screen,
It does not interfere with the charged pigment particles electrophoresis of electronic ink layer, therefore will not change the display of display screen.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, can make various changes or modifications, therefore protection scope of the present invention should
When being subject to claim limited range.
Claims (29)
1. a kind of electronic ink display panel, it is characterised in that the working lining shown including capacitance touch, the working lining is again
As the common electrode layer of electronic ink display panel, the electronic ink display panel further includes glass substrate, film crystal
Tube layer, electronic ink layer and protective layer, the tft layer are located on the glass substrate, and the electronic ink layer is located at
On the tft layer, between the protective layer and electronic ink layer, the working lining includes more the working lining
A touch controlled key and the corresponding button line for connecting the touch controlled key；Further include the conduction being arranged in the common electrode layer
Layer, the backup for the working lining that the conductive layer is shown as capacitance touch.
2. electronic ink display panel as claimed in claim 1, it is characterised in that further include the selection common electrode layer or
Switch switching unit of the conductive layer as the working lining of capacitive touch screen.
3. electronic ink display panel as claimed in claim 1, it is characterised in that multi-path choice module is further included, it is described to press
Key line is connected by multi-path choice module with detection circuit.
4. electronic ink display panel as claimed in claim 1, it is characterised in that the working lining that the capacitance touch is shown
For indium tin oxide layer or IZO layer.
5. electronic ink display panel as claimed in claim 1, it is characterised in that the protective layer is arranged at the common electrical
Between pole layer and conductive layer.
6. electronic ink display panel as claimed in claim 1, it is characterised in that further include and be arranged on the conductive layer
Second protective layer.
7. a kind of electronic ink display panel, it is characterised in that the working lining shown including capacitance touch, the working lining is again
As the common electrode layer of electronic ink display panel, the electronic ink display panel further includes glass substrate, film crystal
Tube layer, electronic ink layer and protective layer, the tft layer are located on the glass substrate, and the electronic ink layer is located at
On the tft layer, between the protective layer and electronic ink layer, the working lining has equal the working lining
Even resistance, further includes detection circuit, and the detection circuit is used for the apex angle electric current for detecting the working lining；Further include and be arranged at institute
State the conductive layer in common electrode layer, the backup for the working lining that the conductive layer is shown as capacitance touch.
8. electronic ink display panel as claimed in claim 7, it is characterised in that further include the selection common electrode layer or
Switch switching unit of the conductive layer as the working lining of capacitive touch screen.
9. electronic ink display panel as claimed in claim 7, it is characterised in that the working lining that the capacitance touch is shown
For indium tin oxide layer or IZO layer.
10. electronic ink display panel as claimed in claim 7, it is characterised in that the protective layer is arranged at described public
Between electrode layer and conductive layer.
11. electronic ink display panel as claimed in claim 7, it is characterised in that further include and be arranged on the conductive layer
The second protective layer.
12. a kind of electronic ink display panel, it is characterised in that the working lining shown including capacitance touch, the working lining
Driving layer and inductive layer including mutually insulated, the driving layer in the working lining is again as the public of electronic ink display panel
Electrode layer, the driving layer include a plurality of parallel drives line, and the inductive layer includes a plurality of sense vertical with the drives line
Line is answered, the electronic ink display panel further includes glass substrate, tft layer, electronic ink layer and protective layer, described
Tft layer is located on the glass substrate, and the electronic ink layer is located on the tft layer, the work
Layer is between the protective layer and electronic ink layer；Sequentially include from bottom to up：The glass substrate, the thin film transistor (TFT)
The sensing that driving layer, insulating layer, the capacitance touch that layer, the electronic ink layer, the capacitance touch are shown are shown
Layer and the protective layer.
13. electronic ink display panel as claimed in claim 12, it is characterised in that the drives line includes multiple first figures
Shape and the first connecting portion for connecting first figure, the line of induction include multiple second graphs and connect the second graph
Second connecting portion, second connecting portion and the first connecting portion face overlaps, and the second graph and the first figure are mutually wrong
Open.
14. electronic ink display panel as claimed in claim 12, it is characterised in that further include detection circuit, the detection
Circuit includes drive end and test side, and the drives line is connected with the drive end of the detection circuit, the line of induction with
The test side connection of the detection circuit.
15. electronic ink display panel as claimed in claim 12, it is characterised in that the protective layer is arranged at the sensing
On layer.
16. electronic ink display panel as claimed in claim 12, it is characterised in that the work that the capacitance touch is shown
Layer is indium tin oxide layer or IZO layer.
A kind of 17. forming method of electronic ink display panel, it is characterised in that including：Glass substrate is provided, in the glass
Tft layer is formed on substrate, electronic ink layer is formed on the tft layer, in the electronic ink layer
Form the working lining that shows of capacitance touch, the working lining common electrode layer as electronic ink display panel again, in institute
State and protective layer is formed on working lining, the working lining forms the condenser type between the protective layer and electronic ink layer
Touching the working lining of display includes：Form common electrode layer；The common electrode layer is etched, forms multiple touch controlled keys and correspondence
Connect the button line of the touch controlled key；Also include forming conductive layer, the conductive layer conduct in the common electrode layer
The backup for the working lining that capacitance touch is shown.
18. the forming method of electronic ink display panel as claimed in claim 17, it is characterised in that further include described in connection
Common electrode layer and conductive layer select common electrode layer or conductive layer as capacitance to switch switching unit by switch switching unit
The working lining of formula touch-screen.
19. the forming method of electronic ink display panel as claimed in claim 17, it is characterised in that further include and pass through multichannel
Selecting module connects the button and links to detection circuit.
20. the forming method of electronic ink display panel as claimed in claim 17, it is characterised in that the protective layer is formed
Between the common electrode layer and conductive layer.
21. the forming method of electronic ink display panel as claimed in claim 17, it is characterised in that be additionally included in described lead
The second protective layer is formed in electric layer.
A kind of 22. forming method of electronic ink display panel, it is characterised in that including：Glass substrate is provided, in the glass
Tft layer is formed on substrate, electronic ink layer is formed on the tft layer, in the electronic ink layer
Form the working lining that shows of capacitance touch, the working lining common electrode layer as electronic ink display panel again, in institute
State and protective layer is formed on working lining, between the protective layer and electronic ink layer, the working lining has the working lining
Even resistance, further includes and connects the apex angle of the working lining to detection circuit；Also include being formed in the common electrode layer leading
Electric layer, the backup for the working lining that the conductive layer is shown as capacitance touch.
23. the forming method of electronic ink display panel as claimed in claim 22, it is characterised in that further include described in connection
Common electrode layer and conductive layer select common electrode layer or conductive layer as capacitance to switch switching unit by switch switching unit
The working lining of formula touch-screen.
24. the forming method of electronic ink display panel as claimed in claim 22, it is characterised in that the protective layer is formed
Between the common electrode layer and conductive layer.
25. the forming method of electronic ink display panel as claimed in claim 22, it is characterised in that be additionally included in described lead
The second protective layer is formed in electric layer.
A kind of 26. forming method of electronic ink display panel, it is characterised in that including：Glass substrate is provided, in the glass
Tft layer is formed on substrate, electronic ink layer is formed on the tft layer, in the electronic ink layer
The working lining that capacitance touch is shown is formed, the working lining includes the driving layer and inductive layer of mutually insulated, the working lining
In the driving layer common electrode layer as electronic ink display panel again, protective layer, the work are formed on the working lining
Make layer between the protective layer and electronic ink layer, the working lining that the formation capacitance touch is shown includes：
Form common electrode layer；
The common electrode layer is etched, forms a plurality of parallel drives line；
The forming method of the electronic ink display panel further includes：
Insulating layer is formed on the driving layer；
Inductive layer is formed on the insulating layer；
The inductive layer is etched, forms a plurality of line of induction vertical with the drives line.
27. the forming method of electronic ink display panel as claimed in claim 26, it is characterised in that etch the common electrical
Pole layer, a plurality of parallel drives line of formation, which is included in the drives line, forms multiple first figures and connection first figure
First connecting portion；The inductive layer is etched, a plurality of line of induction vertical with the drives line is formed and is included in the line of induction
The upper second connecting portion for forming multiple second graphs and connecting the second graph, the second connecting portion and first connecting portion are just
To overlapping, the second graph and the first figure mutually stagger.
28. the forming method of electronic ink display panel as claimed in claim 26, it is characterised in that further include described in connection
Drives line connects the line of induction to the test side of detection circuit to the drive end of detection circuit.
29. the forming method of electronic ink display panel as claimed in claim 26, it is characterised in that the protective layer is formed
On the inductive layer.
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| CN200910054059.8A CN101930143B (en) | 2009-06-24 | 2009-06-24 | Electronic ink display panel and forming method thereof |
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| CN200910054059.8A CN101930143B (en) | 2009-06-24 | 2009-06-24 | Electronic ink display panel and forming method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102270077A (en) * | 2011-07-20 | 2011-12-07 | 信利半导体有限公司 | Capacitive touch screen |
| JP6485618B2 (en) * | 2013-11-11 | 2019-03-20 | Ｔｉａｎｍａ Ｊａｐａｎ株式会社 | Piezoelectric sheet, touch panel using the same, and input / output device using them |
| CN105096841A (en) * | 2015-08-18 | 2015-11-25 | 京东方科技集团股份有限公司 | Electrophoresis display device and driving method thereof |
| CN108399351A (en) * | 2017-02-04 | 2018-08-14 | 上海箩箕技术有限公司 | Fingerprint imaging module and electronic equipment |
| CN108646940A (en) * | 2018-04-24 | 2018-10-12 | 维沃移动通信有限公司 | A kind of electronic ink screen and mobile terminal |
| CN111625111A (en) * | 2019-02-28 | 2020-09-04 | 奇景光电股份有限公司 | Touch control system |
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| CN1942853A (en) * | 2004-05-06 | 2007-04-04 | 苹果电脑有限公司 | Multipoint touchscreen |
| CN101261416A (en) * | 2007-03-07 | 2008-09-10 | 精工爱普生株式会社 | Electrophoresis display device, driving method and electric device thereof |
| CN101458601A (en) * | 2007-12-14 | 2009-06-17 | 清华大学 | Touch screen and display device |
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| JP2003066417A (en) * | 2001-08-22 | 2003-03-05 | Sharp Corp | Touch sensor integrated type display device |
| KR20070076221A (en) * | 2006-01-18 | 2007-07-24 | 삼성전자주식회사 | Electro phoretic indication display |
| KR20080053035A (en) * | 2006-12-08 | 2008-06-12 | 삼성전자주식회사 | Electrophoretic display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1942853A (en) * | 2004-05-06 | 2007-04-04 | 苹果电脑有限公司 | Multipoint touchscreen |
| CN101261416A (en) * | 2007-03-07 | 2008-09-10 | 精工爱普生株式会社 | Electrophoresis display device, driving method and electric device thereof |
| CN101458601A (en) * | 2007-12-14 | 2009-06-17 | 清华大学 | Touch screen and display device |
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