CN101930143A - Electronic ink display panel and forming method thereof - Google Patents
Electronic ink display panel and forming method thereof Download PDFInfo
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- CN101930143A CN101930143A CN2009100540598A CN200910054059A CN101930143A CN 101930143 A CN101930143 A CN 101930143A CN 2009100540598 A CN2009100540598 A CN 2009100540598A CN 200910054059 A CN200910054059 A CN 200910054059A CN 101930143 A CN101930143 A CN 101930143A
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Abstract
The invention relates to an electronic ink display panel and a forming method thereof. The electronic ink display panel comprises a glass substrate, a thin film transistor layer, an electronic ink layer, a capacitance type touch display working layer and a protective layer from bottom to top sequentially, wherein the working layer shares the common electrode layer of the electronic ink display panel. The electronic ink display panel integrates a capacitance type touch screen, has simple forming process, better touch detection performance and longer service life, can not increase the thickness of the display screen, and does not affect the light transmittance and contrast of display.
Description
Technical field
The present invention relates to the demonstration field, particularly electronic ink display panel and forming method thereof.
Background technology
The electrophoresis-type display screen is a kind of non-luminous flat display device, and it has utilized the colloid dispersed particle that the principle of swimming takes place under electric field action, and advantage is that contrast height, visual angle are wide, low energy consumption, display brightness height, cheap.It is that charged pigment particles is dispersed in the suspending liquid electrolyte that electric ink (E-ink) shows, utilizes transparent microcapsules to coat the suspending liquid electrolyte then, makes the charged pigment particles electrophoresis by extra electric field, by the reflection display message.
Fig. 1 has shown the structure of existing a kind of electronic ink display panel; comprise in regular turn from the bottom to top: glass substrate 101, thin film transistor (TFT) (TFT) layer 102, electronic ink layer 103, tin indium oxide (ITO) layer 104 and protective seam 105; wherein, tin indium oxide (ITO) layer 104 is common electrode layer of electronic ink display panel.Electronic ink layer 103 comprises a plurality of transparent microcapsules 103a, each transparent microcapsules 103a coats suspending liquid electrolyte 103b and a plurality of charged pigment particles 103c that are dispersed among the suspending liquid electrolyte 103b, (changing) under the extra electric field effect as the electric field between pixel electrode and the public electrode, the charged pigment particles electrophoresis makes pixel show the color of variable grain by reflection.
Touch-screen has resistance-type, condenser type, surface acoustic wave type, infrared type or the like as a kind of interface of user interactive.Generally, electric ink display screen with touch function can be touch-screen separately to be made then with the electric ink display screen be produced on by the mode of assembling, certainly will increase the thickness of electric ink display screen like this, owing to increased several layers clear glass or film, display transparent rate and contrast also can obviously descend.And it is complicated that this way forms technology, and cost is also higher.
The electric ink display screen is as a kind of novel display technique, and integrated touch screen can provide better user interactivity in the surface of display screen, and does not increase the volume of display screen.
The existing touch-screen that is integrated in the electric ink display screen is resistance-type substantially, for example U.S. Pat 20080137177 discloses a kind of electric ink display screen of integrated resistor formula touch-screen, between upper strata glass and lower floor's glass, be provided with the contact induction device, when finger is depressed, the induction contact point of upper strata glass contacts with lower floor, the change in voltage that causes touch points, the contact induction device spreads out of corresponding electric signal, comes the position of detected touch point by detected electric signal.The electric ink display screen of this integrated resistor formula touch-screen is owing to will form induction interconnection and contact induction device in the electronic ink layer between layer glass, and it is complicated therefore to form technology.
Summary of the invention
The purpose of this invention is to provide a kind of electronic ink display panel and forming method thereof and form technology than complicated problems to solve existing electric ink display screen with touch function.
For addressing the above problem, embodiment of the present invention provides a kind of electronic ink display panel, comprises the working lining that capacitance touch shows, the common electrode layer of the shared described electronic ink display panel of described working lining.
Optionally, described electronic ink display panel also comprises the conductive layer that is arranged on the described common electrode layer, the working lining that described conductive layer shows as capacitance touch.
Optionally, described electronic ink display panel also comprises the switch switching unit of selecting the working lining that described common electrode layer or conductive layer show as capacitance touch.
Optionally, described working lining comprises a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.
Optionally, described electronic ink display panel also comprises multichannel selection module and testing circuit, and described button line selects module to be connected with testing circuit by multichannel.
Optionally, described working lining has even resistance.
Optionally, described electronic ink display panel also comprises the testing circuit of the drift angle electric current that detects described working lining.
Optionally, described working lining comprises the Drive Layer and the inductive layer of mutually insulated, the shared working lining of described and common electrode layer electronic ink display panel is a Drive Layer, and described Drive Layer comprises many parallel drive wires, and described inductive layer comprises many lines of induction vertical with described drive wire.
Optionally, described drive wire comprises a plurality of first figures and first connecting portion that is connected described first figure, the described line of induction comprises a plurality of second graphs and second connecting portion that is connected described second graph, described second connecting portion and first connecting portion are over against overlapping, and the described second graph and first figure stagger mutually.
Optionally, described electronic ink display panel also comprises testing circuit, and described testing circuit comprises drive end and test side, and described drive wire is connected with the drive end of testing circuit, and the described line of induction is connected with the test side of testing circuit.
Optionally, described electronic ink display panel also comprises the protective seam that is arranged on the described inductive layer.
Optionally, the working lining of described capacitance touch demonstration is indium tin oxide layer or indium zinc oxide layer.
Optionally, described electronic ink display panel also comprises the protective seam that is arranged on the described common electrode layer.
Optionally, described electronic ink display panel also comprises the protective seam that is arranged between described common electrode layer and the conductive layer.
Optionally, described electronic ink display panel also comprises the protective seam that is arranged on the described conductive layer.
For addressing the above problem, embodiment of the present invention also provides a kind of formation method of electronic ink display panel, comprising: the working lining that the shared capacitance touch of the common electrode layer of formation and described electronic ink display panel shows.
Optionally, the formation method of described electronic ink display panel also is included on the described common electrode layer and forms conductive layer, the working lining that described conductive layer shows as capacitance touch.
Optionally, the formation method of described electronic ink display panel also comprises and connects described common electrode layer and conductive layer to switch switching unit, the working lining of selecting common electrode layer or conductive layer to show as capacitance touch by switch switching unit.
Optionally, the working lining that the shared capacitance touch of the common electrode layer of formation and described electronic ink display panel shows comprises: the described common electrode layer of etching forms a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.
Optionally, the formation method of described electronic ink display panel comprises that also selecting module to connect described button by multichannel links to testing circuit.
Optionally, described working lining has even resistance.
Optionally, the formation method of described electronic ink display panel comprises that also the drift angle that connects described working lining is to testing circuit.
Optionally, forming the working lining that shows with the shared capacitance touch of the common electrode layer of described electronic ink display panel comprises:
The described common electrode layer of etching forms many parallel drive wires;
On described Drive Layer, form insulation course;
On described insulation course, form inductive layer;
The described inductive layer of etching forms many lines of induction vertical with described drive wire.
Optionally, the described common electrode layer of etching forms many parallel drive wires and is included in formation a plurality of first figures and first connecting portion that is connected described first figure on the described drive wire; The described inductive layer of etching, forming many is included in the vertical line of induction of described drive wire and forms a plurality of second graphs and second connecting portion that is connected described second graph on the described line of induction, described second connecting portion and first connecting portion are over against overlapping, and the described second graph and first figure stagger mutually.
Optionally, the formation method of described electronic ink display panel also comprises the drive end of the described drive wire of connection to testing circuit, connects the test side of the described line of induction to testing circuit.
Optionally, the formation method of described electronic ink display panel also is included on the described inductive layer and forms protective seam.
Optionally, the formation method of described electronic ink display panel also is included on the described common electrode layer and forms protective seam.
Optionally, the formation method of described electronic ink display panel also is included between described common electrode layer and the conductive layer and forms protective seam.
Optionally, the formation method of described electronic ink display panel also is included on the described conductive layer and forms protective seam.
Compared with prior art, technique scheme has the following advantages: form the working lining that capacitance touch shows on electronic ink layer, the common electrode layer of the shared described electronic ink display panel of described working lining, electric ink display screen than existing integrated resistor formula touch-screen, it is simpler to form technology, and has better touch detection performance and longer serviceable life; Than existing electric ink display screen and touch-screen are fitted together, can not increase the thickness of display screen, and do not influence the transmittance and the contrast of demonstration.
Description of drawings
Fig. 1 is a kind of structural representation of existing electronic ink display panel;
Fig. 2 is an example structure synoptic diagram of electronic ink display panel of the present invention;
Fig. 3 is the example structure synoptic diagram of the working lining of electronic ink display panel shown in Figure 2;
Fig. 4 is the schematic equivalent circuit of the working lining of electronic ink display panel shown in Figure 3;
Fig. 5 is an embodiment process flow diagram that forms electronic ink display panel shown in Figure 2;
Fig. 6 is another example structure synoptic diagram of electronic ink display panel of the present invention;
Fig. 7 is the example structure synoptic diagram of the Drive Layer of electronic ink display panel shown in Figure 6;
Fig. 8 is the example structure synoptic diagram of the inductive layer of electronic ink display panel shown in Figure 6;
Fig. 9 is the Drive Layer of the electronic ink display panel shown in Fig. 7 and 8 and the schematic equivalent circuit of inductive layer;
Figure 10 is an embodiment process flow diagram that forms electronic ink display panel shown in Figure 6;
Figure 11 is another example structure synoptic diagram of electronic ink display panel of the present invention;
Figure 12 is an embodiment process flow diagram that forms electronic ink display panel shown in Figure 11;
Figure 13 is the equivalent circuit diagram of an embodiment of the working lining of electronic ink display panel shown in Figure 11;
Figure 14 is another embodiment process flow diagram that forms electronic ink display panel shown in Figure 11.
Embodiment
The electronic ink display panel of embodiment of the present invention comprises the working lining of the capacitance touch demonstration that is arranged on the electronic ink layer, be about to capacitive touch screen and be integrated in the electronic ink display panel surface, the common electrode layer of the working lining shared electron ink display panel that described capacitance touch shows.Embodiments of the present invention are described in detail below in conjunction with drawings and Examples.
Embodiment 1
The structure of the electronic ink display panel of present embodiment comprises as shown in Figure 2 from bottom to up in regular turn: working lining 204 and protective seam 205 that glass substrate 201, tft layer 202, electronic ink layer 203, capacitance touch show.Wherein, as the common electrode layer 204 of electronic ink display panel, it can be indium tin oxide layer or indium zinc oxide (IZO) layer to the working lining 204 that capacitance touch shows again.
In the present embodiment, capacitance touch is shown as the self-capacitance formula, specifically, and as shown in Figure 3, the working lining 301 (being working lining 204 shown in Figure 2) that capacitance touch shows comprises a plurality of touch controlled keys 302 and the corresponding button line 303 that is connected described touch controlled key 302.
Method by for example etching can be divided into working lining 301 several touch controlled keys 302, each touch controlled key 302 corresponding button line 303.Button line 303 can be the tin indium oxide striped, can be by for example the method and the touch controlled key 302 of etching together form.
The shape of touch controlled key 302 is not defined as square shown in Fig. 3, also can be other shapes such as circle, rectangle, ellipse, triangle, rhombus, parallelogram, square for example, and the shape of each touch controlled key and size can be the same or different.As, the part touch controlled key is circular, the part button is square; The part button is than big key, and the part button is the less button of relatively large button.And the arrangement mode of touch controlled key 302 is not defined as shown in Fig. 3 yet, can adopt other conventional arrangement modes yet.The distribution density of described touch controlled key can evenly also can be inhomogeneous, and concrete distribution situation is provided with as required.
The button line 303 of each touch controlled key 302 selects module 305 to be connected to testing circuit 306 by multichannel, multichannel selects module 305 and testing circuit 306 can be formed on the working lining 301, also can be formed on other layer of electronic ink display panel, perhaps also can be formed in the circuit outside the electronic ink display panel.
The equivalent electrical circuit of working lining 301 shown in Figure 3 as shown in Figure 4, wherein, electric capacity 403 is touch controlled key 302 stray capacitances to ground, and variable capacitance 404 is stray capacitances that finger produces by touch controlled key 302, and resistance 405 is total equivalent resistances of touch controlled key 302 and button line 303.In conjunction with Fig. 3 and Fig. 4, the self-capacitance formula touch control detection principle of present embodiment is as described below: testing circuit 306 produces drive signal (sine wave or pulse square wave signal) 401, select module 305 to detect the button line 303 of each touch controlled key 302 successively by multichannel, when finger touch touch controlled key 302, corresponding variable capacitance 404 changes, the electric current of the button line of the touch controlled key that feasible connection is touched changes, the input end 402 of testing circuit 306 detects the variation of electric current I, thereby can detect the position of the touch controlled key that is touched.
The process flow diagram of the formation method of present embodiment electronic ink display panel as shown in Figure 5, in conjunction with Fig. 2 and Fig. 5, the formation method of the electronic ink display panel of the integrated self-capacitance formula of present embodiment touch-screen comprises:
Step S11 provides glass substrate 201.
Step S12 forms tft layer 202 and electronic ink layer 203 in regular turn on described glass substrate 201.
Step S13 forms common electrode layer 204, the working lining that described common electrode layer shows as capacitance touch on described electronic ink layer 203.
Step S14, the described working lining of etching (common electrode layer) 204 forms a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.The etching process of working lining 204 is done the simple example explanation herein, but be not to be used to limit this process: at first, on described working lining 204, form photoresist layer; Then, through overexposure, development, make photoresist layer form as shown in Figure 3 touch controlled key and arrange and button line figure; Then, be mask with described photoresist layer, the described working lining 204 of etching forms the working lining 301 that self-capacitance formula touch-control shown in Figure 3 shows.The button line of touch controlled key selects module to be connected to testing circuit by multichannel.
Step S15 forms protective seam 205 on described working lining (common electrode layer) 204.
The working lining that the self-capacitance formula touch of present embodiment shows and the common electrode layer of electronic ink display panel are shared, promptly realize touch function on existing electronic ink display panel, therefore do not need any layer of extra increase.This sharing structure has been realized touch function when making electronic ink display panel, thereby has reduced processing step, has reduced cost, and has improved integrated level, has realized thinner structure.In addition, because the response speed of electric ink display screen slow (being generally 100-150ms), far below the driving frequency (being generally 100KHz) of touch-screen, therefore this sharing structure can not influence the demonstration of electric ink display screen.
Embodiment 2
The capacitance touch of present embodiment is shown as mutual capacitance type, and its implementation needs two-layer working lining, comprises Drive Layer and inductive layer, utilizes the mutual capacitance that forms between the two-layer working lining to realize the detection of capacitance touch.
The structure of the electronic ink display panel of present embodiment comprises as shown in Figure 6 from bottom to up in regular turn: inductive layer 606 and protective seam 607 that the Drive Layer 604 that glass substrate 601, tft layer 602, electronic ink layer 603, capacitance touch show, insulation course 605, capacitance touch show.Wherein, the Drive Layer 604 that capacitance touch shows is again as the common electrode layer of electronic ink display panel, and Drive Layer (common electrode layer) 604 and inductive layer 606 can be indium tin oxide layer and indium zinc oxide layer.
Be simplified illustration, same or analogous structure is in this no longer repeat specification, and working lining (being Drive Layer and inductive layer) and the detection principle thereof that only capacitance touch is shown describes herein.In the present embodiment, Drive Layer (common electrode layer) 604 and inductive layer 606 are oppositely arranged, the centre also is provided with insulation course 605, Drive Layer 604 comprises many parallel drive wires, inductive layer 606 comprises many lines of induction vertical with described drive wire, and the intersection point place of the drive wire and the line of induction and middle insulating medium form mutual capacitance.
In the present embodiment, also have a plurality of first figures and first connecting portion that is connected described first figure on the described drive wire, the area of first connecting portion is less than first figure; Also have a plurality of second graphs and second connecting portion that is connected described second graph on the described line of induction, the area of second connecting portion is less than second graph; The second graph and first figure stagger mutually, and second connecting portion and first connecting portion are over against overlapping.Over against first connecting portion that overlaps and second connecting portion and middle insulating medium formation mutual capacitance.
Method by for example etching forms the figure shown in the working lining 701 of Fig. 7 on Drive Layer 604, form the figure shown in the working lining 702 of Fig. 8 on inductive layer 606.Specifically, Drive Layer 701 comprises many vertical drive wires, and every drive wire comprises a plurality of first connecting portion 701a and the first figure 701b, and the first connecting portion 701a links together the first figure 701b, forms drive wire.The area of the first connecting portion 701a is less than the first figure 701b, and for example, the first connecting portion 701a can be the tin indium oxide striped, can together form by the method and the first figure 701b of for example etching.Drive signal is added in an end 701c of drive wire.Inductive layer 702 comprises the line of induction of many levels, and every line of induction comprises a plurality of second connecting portion 702a and a plurality of second graph 702b, and the second connecting portion 702a links together second graph 702b, forms the line of induction.The area of the second connecting portion 702a is less than second graph 702b, and for example, the second connecting portion 702a can be the tin indium oxide striped, can together form by the method and the second graph 702b of for example etching.One end 702c of the line of induction is the test side.
In other embodiments, Drive Layer 604 also can be etched into the figure shown in the working lining 702 of Fig. 8, and accordingly, inductive layer then is etched into the figure shown in the working lining 701 of Fig. 7.
The shape of first figure, second graph is not defined as the rhombus shown in Fig. 7 and 8, can be other shapes such as rectangle, square, regular hexagon for example yet, and with respect to other shape, rhombus connects and has less connection resistances.The distribution density of first figure and second graph can be provided with according to actual needs.
Shown in Fig. 7 and 8, when the end 701c at a drive wire of Drive Layer 701 added drive signal, all the other drive wires are ground connection all, then in an end 702c change in detection signal of every line of induction of inductive layer 702.When finger touch, can detect corresponding charge at the test side of line of induction 702a 702c and change, according to concrete scanning be which the bar drive wire and the line of induction that detects corresponding charge variation, just can determine the particular location that touches.
The equivalent electrical circuit of Drive Layer shown in Figure 7 and inductive layer shown in Figure 8 as shown in Figure 9, wherein, electric capacity 902 is stray capacitances that drive wire arrives ground, electric capacity 903 is the mutual capacitance over against the overlapping place of Drive Layer 701 and inductive layer 702, electric capacity 904 is equivalent capacitys of finger touch, electric capacity 906 is stray capacitances that the line of induction arrives ground, and resistance 907 is equivalent resistances of drive wire, and resistance 908 is equivalent resistances of the line of induction.In conjunction with Fig. 7,8 and Fig. 9, it is as described below that the mutual capacitance type touch control of present embodiment detects principle: the drive signal (sine wave or pulse square wave signal) 901 that the drive end of testing circuit produces is added in an end 701c of drive wire, when finger touch, (be equivalent to switch 909 closures), make the amplitude of the detected output current I in test side of testing circuit diminish, the voltage Vout that detects the output terminal of change-over circuit 905 diminishes, therefore, the electric current that can detect an end (test side) 702c of the corresponding line of induction by testing circuit changes, thereby can detect the position that is touched.
When multiple point touching, can detect corresponding position simultaneously, because the detection mode of mutual capacitance is the drive wire of lining by line scan, when scanning a drive wire, detect each bar line of induction, therefore can tell the physical location of a plurality of touch points simultaneously.
The process flow diagram of the formation method of present embodiment electronic ink display panel as shown in figure 10, in conjunction with Fig. 6 and Figure 10, the formation method of the electronic ink display panel of the integrated mutual capacitance type touch-screen of present embodiment comprises:
Step S21 provides glass substrate 601.
Step S22 forms tft layer 602 and electronic ink layer 603 in regular turn on described glass substrate 601.
Step S23 forms common electrode layer 604, the Drive Layer that described common electrode layer shows as capacitance touch on described electronic ink layer 603.
Step S24, the described Drive Layer of etching (common electrode layer) 604 forms many drive wires, has a plurality of first figures and first connecting portion that is connected described first figure on the described drive wire.The etching process of Drive Layer 604 is done the simple example explanation herein, but be not to be used to limit this process: at first, on described Drive Layer 604, form photoresist layer; Then, through overexposure, development, make photoresist layer formation lozenge diagram shown in the working lining 701 of Fig. 7 arrange and the drive wire figure; Then, be mask with described photoresist layer, the described Drive Layer 604 of etching forms the Drive Layer 701 that mutual capacitance type touch control shown in Figure 7 shows.Drive wire is connected to the drive end of testing circuit.
Step S25 forms insulation course 605 on described Drive Layer (common electrode layer) 604.
Step S26 forms inductive layer 606 on described insulation course 605.
Step S27, the described inductive layer 606 of etching forms many lines of induction, has a plurality of second graphs and second connecting portion that is connected described second graph on the described line of induction, described second connecting portion and first connecting portion are over against overlapping, and the described second graph and first figure stagger mutually.The etching process of inductive layer 606 is done the simple example explanation herein, but be not to be used to limit this process: at first, on described inductive layer 606, form photoresist layer; Then, through overexposure, development, make photoresist layer formation lozenge diagram shown in the working lining 702 of Fig. 8 arrange and line of induction figure; Then, be mask with described photoresist layer, the described inductive layer 606 of etching forms worker's inductive layer 702 that mutual capacitance type touch control shown in Figure 8 shows.The line of induction is connected to the test side of testing circuit.
Step S28 forms protective seam 607 on described inductive layer 606.
It is shared with the common electrode layer of electronic ink display panel that the mutual capacitance type of present embodiment touches the working lining (Drive Layer) that shows, therefore only need increase one deck working lining (inductive layer) more promptly can realize touch function on electronic ink display panel.This sharing structure has reduced processing step, has reduced cost, and has improved integrated level, has realized thinner structure.In addition, because the response speed of electric ink display screen slow (being generally 100-150ms), far below the driving frequency (being generally 100KHz) of touch-screen, therefore this sharing structure can not influence the demonstration of electric ink display screen.
Embodiment 3
The structure of the electronic ink display panel of present embodiment comprises as shown in figure 11 from bottom to up in regular turn: glass substrate 111, tft layer 112, electronic ink layer 113, common electrode layer 114, first protective seam 115, conductive layer 116 and second protective seam 117.Wherein, common electrode layer 114 and conductive layer 116 can be used as the working lining that capacitance touch shows, common electrode layer 114 and conductive layer 116 can be indium tin oxide layer or indium zinc oxide layer.
Be simplified illustration, same or analogous structure only describes common electrode layer 114 and conductive layer 116 in this no longer repeat specification herein.The capacitance touch of present embodiment is shown as the self-capacitance formula, therefore, common electrode layer 114 working lining that touch shows as the self-capacitance formula is etched to figure as shown in Figure 3, comprise a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key, the equivalent electrical circuit of described working lining as shown in Figure 4, it is identical with embodiment 1 that it detects principle.Conductive layer 116 working lining that touch shows as the self-capacitance formula is etched to figure as shown in Figure 3, comprise a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key, the equivalent electrical circuit of described working lining as shown in Figure 4, it is identical with embodiment 1 that it detects principle.
Than embodiment 1, present embodiment has increased the conductive layer 116 that one deck can be used as the working lining that capacitance touch shows again.The working lining of selecting common electrode layer 114 or conductive layer 116 to show by a switch switching unit as capacitance touch.Switch switching unit can be formed on the common electrode layer 114 or on the conductive layer 116, also can be formed on other layer of electronic ink display panel, perhaps also can be formed in the circuit outside the electronic ink display panel.
The process flow diagram of the formation method of present embodiment electronic ink display panel as shown in figure 12, in conjunction with Figure 11 and Figure 12, the formation method of the electronic ink display panel of the integrated self-capacitance formula of present embodiment touch-screen comprises:
Step S31 provides glass substrate 111.
Step S32 forms tft layer 112, electronic ink layer 113 and common electrode layer 114 in regular turn on described glass substrate 111.
Step S33, the described common electrode layer 114 of etching forms a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.Common electrode layer is connected to switch switching unit, and the button line of touch controlled key selects module to be connected to testing circuit by multichannel.
Step S34 forms first protective seam 115 on described common electrode layer 114.
Step S35 forms conductive layer 116 on described first protective seam 115.
Step S36, the described conductive layer 116 of etching forms a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.Conductive layer is connected to switch switching unit, and the button line of touch controlled key selects module to be connected to testing circuit by multichannel.
Step S37 forms second protective seam 117 on described conductive layer 116.
Present embodiment is integrated in electronic ink display panel with self-capacitance formula touch-screen, the working lining that the self-capacitance formula touch to show can the shared electron ink display panel common electrode layer, it also can be conductive layer independently, promptly the working lining that capacitance touch is shown has been done backup, thereby has increased the dirigibility of using.Embodiment 4
The structure of the electronic ink display panel of present embodiment is substantially the same manner as Example 3, different is, embodiment 3 is that the self-capacitance formula touches and shows, and present embodiment to be surface capacitance type touch shows, therefore, the working lining of the capacitance touch of present embodiment demonstration has uniform resistance.
The structure of the electronic ink display panel of present embodiment comprises as shown in figure 11 from bottom to up in regular turn: glass substrate 111, tft layer 112, electronic ink layer 113, common electrode layer 114, first protective seam 115, conductive layer 116 and second protective seam 117.Wherein, common electrode layer 114 and conductive layer 116 can be used as the working lining that capacitance touch shows, common electrode layer 114 and conductive layer 116 can be indium tin oxide layer or indium zinc oxide layer.
Be simplified illustration, same or analogous structure is in this no longer repeat specification, herein only to common electrode layer 114 and conductive layer 116 and detect principle and describe.In the present embodiment, capacitance touch is shown as surface capacitance type, and specifically, common electrode layer 114 and conductive layer 116 have even resistance, and conductive layer 116 can be indium tin oxide layer or the indium zinc oxide layer that one deck does not have pattern, does not need to carry out etching.The working lining that can select common electrode layer 114 or conductive layer 116 to show by switch switching unit as capacitance touch.Four drift angles at working lining apply drive signal, and the electric current that detects four drift angles simultaneously just can detect touch location.
Figure 13 is the equivalent electrical circuit of the working lining of present embodiment capacitance touch demonstration, it has adopted surface capacitance type touch control detection principle, specific as follows described: when finger touch working lining 131, between the working lining of finger touch position and the finger just equivalence be the capacitor C of a ground connection, therefore just form a turning circuit from AC power 132 to finger, thereby produced electric current.The electric current I 1 that produces, I2, I3, the resistance R 1 between P to four drift angle in I4 and touch point, R2, R3, R4 is inversely proportional to, and these four resistance R 1, R2, R3, the value of R4 arrives upper left corner UL, upper right corner UR, lower left corner LL with touch point P again, the distance of lower right corner LR is directly proportional, therefore by detecting the electric current I 1 on four drift angles, I2, I3, I4 just can determine the touch location P that points.
The process flow diagram of the formation method of present embodiment electronic ink display panel as shown in figure 14, in conjunction with Figure 11 and Figure 14, the formation method of the electronic ink display panel of the integrated surface capacitance type touch screen of present embodiment comprises:
Step S41 provides glass substrate 111.
Step S42 forms tft layer 112, electronic ink layer 113, common electrode layer 114 and first protective seam 115 in regular turn on described glass substrate 111, described common electrode layer 114 has uniform resistance.Common electrode layer connects switch switching unit, and four drift angles of common electrode layer are connected to testing circuit.
Step S43 forms conductive layer 116 on described first protective seam 115, described conductive layer 116 has uniform resistance.Conductive layer connects switch switching unit, and four drift angles of conductive layer are connected to testing circuit.
Step S44 forms second protective seam 117 on described conductive layer 116.
Present embodiment is integrated in electronic ink display panel with surface capacitance type touch screen, the working lining that surface capacitance type touch to show can the shared electron ink display panel common electrode layer, it also can be conductive layer independently, the working lining that capacitance touch shows is done backup, thereby increased the dirigibility of using.Because conductive layer does not need to carry out etching, thereby has simplified technology.
In sum, the electronic ink display panel of the integrated capacitive touch screen of the foregoing description, on electronic ink layer, form the working lining that capacitance touch shows, the working lining that described capacitance touch shows and the common electrode layer of electronic ink display panel are shared, electric ink display screen than existing integrated resistor formula touch-screen, it is simpler to form technology, and has better touch detection performance and longer serviceable life; Than existing electric ink display screen and capacitive touch screen are fitted together, can not increase the thickness of display screen, and do not influence the transmittance and the contrast of demonstration.
In addition, owing to the electric field summation to the added drive signal of touch-screen (sine wave or pulse square wave signal) is zero, it can not influence the charged pigment particles electrophoresis of electronic ink layer, therefore can not change the demonstration of display screen.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (29)
1. an electronic ink display panel is characterized in that, comprises the working lining that capacitance touch shows, the common electrode layer of the shared described electronic ink display panel of described working lining.
2. electronic ink display panel as claimed in claim 1 is characterized in that, also comprises the conductive layer that is arranged on the described common electrode layer, the working lining that described conductive layer shows as capacitance touch.
3. electronic ink display panel as claimed in claim 2 is characterized in that, also comprises described common electrode layer of selection or the conductive layer switch switching unit as the working lining of capacitance touch demonstration.
4. as each described electronic ink display panel in the claim 1 to 3, it is characterized in that described working lining comprises a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.
5. electronic ink display panel as claimed in claim 4 is characterized in that, also comprises multichannel selection module and testing circuit, and described button line selects module to be connected with testing circuit by multichannel.
6. as each described electronic ink display panel in the claim 1 to 3, it is characterized in that described working lining has even resistance.
7. electronic ink display panel as claimed in claim 6 is characterized in that, also comprises the testing circuit of the drift angle electric current that detects described working lining.
8. electronic ink display panel as claimed in claim 1, it is characterized in that, described working lining comprises the Drive Layer and the inductive layer of mutually insulated, the shared working lining of described and common electrode layer electronic ink display panel is a Drive Layer, described Drive Layer comprises many parallel drive wires, and described inductive layer comprises many lines of induction vertical with described drive wire.
9. electronic ink display panel as claimed in claim 8, it is characterized in that, described drive wire comprises a plurality of first figures and first connecting portion that is connected described first figure, the described line of induction comprises a plurality of second graphs and second connecting portion that is connected described second graph, described second connecting portion and first connecting portion are over against overlapping, and the described second graph and first figure stagger mutually.
10. electronic ink display panel as claimed in claim 8, it is characterized in that also comprise testing circuit, described testing circuit comprises drive end and test side, described drive wire is connected with the drive end of testing circuit, and the described line of induction is connected with the test side of testing circuit.
11. electronic ink display panel as claimed in claim 8 is characterized in that, also comprises the protective seam that is arranged on the described inductive layer.
12. electronic ink display panel as claimed in claim 1 or 2 is characterized in that, the working lining that described capacitance touch shows is indium tin oxide layer or indium zinc oxide layer.
13. electronic ink display panel as claimed in claim 1 is characterized in that, also comprises the protective seam that is arranged on the described common electrode layer.
14. electronic ink display panel as claimed in claim 2 is characterized in that, also comprises the protective seam that is arranged between described common electrode layer and the conductive layer.
15. electronic ink display panel as claimed in claim 2 is characterized in that, also comprises the protective seam that is arranged on the described conductive layer.
16. the formation method of an electronic ink display panel is characterized in that, comprising: the working lining that the shared capacitance touch of the common electrode layer of formation and described electronic ink display panel shows.
17. the formation method of electronic ink display panel as claimed in claim 16 is characterized in that, also is included on the described common electrode layer and forms conductive layer, the working lining that described conductive layer shows as capacitance touch.
18. the formation method of electronic ink display panel as claimed in claim 17, it is characterized in that, also comprise connecting described common electrode layer and conductive layer the working lining of selecting common electrode layer or conductive layer to show by switch switching unit as capacitance touch to switch switching unit.
19. formation method as each described electronic ink display panel in the claim 16 to 18, it is characterized in that, the working lining that the shared capacitance touch of the common electrode layer of formation and described electronic ink display panel shows comprises: the described common electrode layer of etching forms a plurality of touch controlled keys and the corresponding button line that is connected described touch controlled key.
20. the formation method of electronic ink display panel as claimed in claim 19 is characterized in that, comprises that also selecting module to connect described button by multichannel links to testing circuit.
21. the formation method as each described electronic ink display panel in the claim 16 to 18 is characterized in that described working lining has even resistance.
22. the formation method of electronic ink display panel as claimed in claim 21 is characterized in that, comprises that also the drift angle that connects described working lining is to testing circuit.
23. the formation method of electronic ink display panel as claimed in claim 16 is characterized in that, the working lining that the shared capacitance touch of the common electrode layer of formation and described electronic ink display panel shows comprises:
The described common electrode layer of etching forms many parallel drive wires;
On described Drive Layer, form insulation course;
On described insulation course, form inductive layer;
The described inductive layer of etching forms many lines of induction vertical with described drive wire.
24. the formation method of electronic ink display panel as claimed in claim 23, it is characterized in that, the described common electrode layer of etching forms many parallel drive wires and is included in formation a plurality of first figures and first connecting portion that is connected described first figure on the described drive wire; The described inductive layer of etching, forming many is included in the vertical line of induction of described drive wire and forms a plurality of second graphs and second connecting portion that is connected described second graph on the described line of induction, described second connecting portion and first connecting portion are over against overlapping, and the described second graph and first figure stagger mutually.
25. the formation method of electronic ink display panel as claimed in claim 23 is characterized in that, also comprises connecting the drive end of described drive wire to testing circuit, connects the test side of the described line of induction to testing circuit.
26. the formation method of electronic ink display panel as claimed in claim 23 is characterized in that, also is included on the described inductive layer and forms protective seam.
27. the formation method of electronic ink display panel as claimed in claim 16 is characterized in that, also is included on the described common electrode layer and forms protective seam.
28. the formation method of electronic ink display panel as claimed in claim 17 is characterized in that, also is included between described common electrode layer and the conductive layer and forms protective seam.
29. the formation method of electronic ink display panel as claimed in claim 17 is characterized in that, also is included on the described conductive layer and forms protective seam.
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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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| CN101930143A true CN101930143A (en) | 2010-12-29 |
| CN101930143B CN101930143B (en) | 2018-04-27 |
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| 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 |
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Also Published As
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| CN101930143B (en) | 2018-04-27 |
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