CN102981657A - Touch type electronic paper displayer - Google Patents
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- CN102981657A CN102981657A CN2011102599979A CN201110259997A CN102981657A CN 102981657 A CN102981657 A CN 102981657A CN 2011102599979 A CN2011102599979 A CN 2011102599979A CN 201110259997 A CN201110259997 A CN 201110259997A CN 102981657 A CN102981657 A CN 102981657A
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Abstract
The invention relates to a touch type electronic paper displayer which comprises an electronic paper display screen and a function layer, wherein the electronic paper display screen comprises a common electrode layer and a display surface. The function layer is arranged on the display surface. The function layer further comprises a carbon nano-tube touch function layer which is arranged on the display surface, and the distance between the common electrode layer and the carbon nano-tube touch function layer is larger than 100 micrometers and smaller than or equal to 2 millimeters.
Description
Technical field
The present invention relates to a kind of electric paper display, relate in particular to a kind of touch control e paper display.
Background technology
Owing to have the advantages such as low-power consumption, flexible, thin thickness, electronic-paper display screen is widely used in using as display screen in the electronic products such as mobile phone, e-book, computing machine and personal digital assistant.
The structure of electronic-paper display screen generally includes electric pole plate, lower electrode plate and is arranged at electrophoretic display medium layer between this electric pole plate and the lower electrode plate.This electric pole plate comprises upper substrate and is arranged at public tin indium oxide (ITO) electrode of this upper substrate lower surface that this lower electrode plate comprises infrabasal plate and is arranged at the thin film transistor (TFT) of this infrabasal plate upper surface (TFT) pixel electrode.This electrophoretic display medium layer fits tightly between this public ITO electrode and TFT pixel electrode.
Notification number is that the Chinese patent of CN101373305B discloses a kind of electric paper display with touch function, existing resistive touch screen is directly sticked to the upper surface of the upper substrate of electronic-paper display screen.Yet, because electronic-paper display screen is to carry out image by the reflection extraneous light to show, usually itself do not possess back lighting device, when on the electronic-paper display screen further during the existing resistive touch screen of superposition, metal on the touch-screen or ITO circuit can see through by stop portions light, and the light that arrives electronic-paper display screen is had than high attenuation, thereby affect the demonstration of electronic-paper display screen.
Summary of the invention
In view of this, necessaryly provide a kind of display device of electronic paper with touch function, utilize comparatively simple structure, avoid light losing, and can realize touch function.
A kind of touch control e paper display, comprise an electronic-paper display screen and a functional layer, this electronic-paper display screen comprises a common electrode layer, and has a display surface, this functional layer is arranged at this display surface, described functional layer further comprises a carbon nano-tube touch function layer, and described carbon nano-tube touch function layer is arranged on this display surface, and the distance between this common electrode layer and this carbon nano-tube touch function layer is greater than 100 microns and be less than or equal to 2 millimeters.
The present invention's touch control e-paper display has carbon nano-tube touch function layer, solve metal on the known touch-screen that is applied to Electronic Paper or the problem of ITO circuit stop portions light because of carbon nano-tube material and the thin characteristic of layer, moreover, because carbon nano tube line has impedance anisotropy and spacing is fine and closely woven, can significantly improve the sensing precision of electric paper display.Further, have enough spacing distances between the common electrode layer of this electronic-paper display screen and this carbon nano-tube touch function layer, thereby avoid causing the excessive sensing to touch point electric capacity of background capacitance to exert an influence because of the work of this electronic-paper display screen 10.
Description of drawings
Fig. 1 is the synoptic diagram of the carbon nano-tube touch function layer of one embodiment of the invention.
Fig. 2 is the drive waveforms synoptic diagram of each change-over switch when scanning in the driving circuit of one embodiment of the invention.
Fig. 3 is extremely shown in Figure 5 to be under the simulation test, the signal that electrode X3 to X6 is received.
Fig. 6 is the side-looking structural representation of first embodiment of the invention Electronic Paper.
Fig. 7 is the stereoscan photograph of first embodiment of the invention carbon nano-tube film.
Fig. 8 is the structural representation of carbon nano-tube fragment in the carbon nano-tube film of Fig. 7.
Fig. 9 is the side-looking structural representation of second embodiment of the invention Electronic Paper.
Figure 10 is the side-looking structural representation of third embodiment of the invention Electronic Paper.
The main element symbol description
| Electronic- |
10 |
| |
20 |
| The |
30 |
| Carbon nano-tube |
100 |
| Carbon nano- |
110 |
| |
112、114、116、118 |
| |
120 |
| |
130 |
| |
132 |
| |
134 |
| The carbon nano-tube fragment | 143 |
| Carbon nano-tube | 145 |
| The |
190 |
| |
200 |
| |
310、320、330、340、350、360、370、380、390 |
| The |
400 |
| The waterproof gas-bearing |
410 |
| The touch control |
500、510、520 |
| |
610 |
| |
612 |
| |
614 |
| |
620 |
| |
622 |
| |
624 |
| The electrophoretic |
630 |
Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with the accompanying drawings and the specific embodiments touch control e paper display provided by the invention is described in further detail.
The invention provides a kind of touch control e paper display, comprise an electronic-paper display screen and a functional layer, this electronic-paper display screen comprises a common electrode layer, and has a display surface, this functional layer is arranged at this display surface, described functional layer further comprises a carbon nano-tube touch function layer, and described carbon nano-tube touch function layer is arranged on this display surface.
See also Fig. 1 and Fig. 6, first embodiment of the invention provides a kind of touch control e paper display 500, and it comprises electronic-paper display screen 10, the first bonding coat 30 and functional layer 20 from bottom to up successively.This first bonding coat 30 is arranged between this electronic-paper display screen 10 and the functional layer 20, and bonding this electronic-paper display screen 10 and this functional layer 20.In this manual " on " be the direction near the user, D score is the direction away from the user.This functional layer 20 comprises a carbon nano-tube touch function layer 100 at least, and this carbon nano-tube touch function layer 100 is arranged on the display surface of described electronic-paper display screen 10 by this first bonding coat 30.This electronic-paper display screen 10 comprises common electrode layer 624, i.e. a upper electrode layer.Distance between this common electrode layer 624 and this carbon nano-tube touch function layer 100 is preferably greater than 125 microns, more preferably greater than 175 microns greater than 100 microns.
This carbon nano-tube touch function layer 100 is for realizing the single layer structure of touch function, and this carbon nano-tube touch function layer 100 comprises carbon nano-tube film 110 and a plurality of driving sensing electrode 120, and these a plurality of driving sensing electrodes 120 are electrically connected with this carbon nano-tube film 110.In the present embodiment, this carbon nano-tube touch function layer 100 and bonding coat 30 overlap.This carbon nano-tube film 110 directly covers this first bonding coat 30.This carbon nano-tube touch function layer 100 can only comprise a carbon nano-tube film 110 or a plurality of carbon nano-tube films 110 of fitting, and driving sensing electrode 120 can be realized the function of sensing touch position.
This carbon nano-tube film 110 comprises a plurality of carbon nano-tube, and these a plurality of carbon nano-tube are substantially along the equidirectional the direction detection extends, thereby makes carbon nano-tube film 110 have conductivity much larger than other direction at the bearing of trend of these a plurality of carbon nano-tube.This carbon nano-tube film 110 can be by pulling formation from a carbon nano pipe array.The whole bearing of trend of most of carbon nano-tube substantially in the same direction and be parallel to the surface of this carbon nano-tube film 110 in the described carbon nano-tube film 110 that pulls formation from carbon nano pipe array.And, each carbon nano-tube joins end to end by Van der Waals force (van der waal ' s force) with carbon nano-tube adjacent on bearing of trend in most of carbon nano-tube of extending substantially in the same direction in the described carbon nano-tube film 110, thereby makes this carbon nano-tube film 110 can realize self-supporting.The carbon nano-tube film 110 that should pull acquisition from carbon nano pipe array has preferably transparency.Preferably, this carbon nano-tube film 110 is the pure nano-carbon tube film 110 that is comprised of carbon nano-tube, thereby can improve the penetrability of touch-screen.
See also Fig. 7, this carbon nano-tube film 110 comprises a plurality of carbon nano tube lines that are arranged in parallel, and this carbon nano tube line is comprised of described basic a plurality of carbon nano-tube along the equidirectional the direction detection extends.The self supporting structure that described carbon nano-tube film 110 is comprised of some carbon nano-tube.Described some carbon nano-tube are in the same direction preferred orientation extension.The whole bearing of trend that described preferred orientation refers to most of carbon nano-tube in carbon nano-tube film 110 substantially in the same direction.And the whole bearing of trend of described most of carbon nano-tube is basically parallel to the surface of carbon nano-tube film 110.Further, most carbon nano-tube are to join end to end by Van der Waals force in the described carbon nano-tube film 110.Each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend in most of carbon nano-tube of extending substantially in the same direction in the described carbon nano-tube film 110 particularly.Certainly, have the carbon nano-tube of minority random alignment in the described carbon nano-tube film 110, these carbon nano-tube can not arranged the overall orientation of most of carbon nano-tube in the carbon nano-tube film 110 and be consisted of obviously impact.Described self-supporting is that carbon nano-tube film 110 does not need large-area carrier supported, and it is can be on the whole unsettled and keep self membranaceous state as long as relative both sides provide support power, when being about to this carbon nano-tube film 110 and placing (or being fixed in) to keep at a certain distance away on two supporters that arrange, the carbon nano-tube film 110 between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting is mainly by existing the continuous Van der Waals force that passes through to join end to end and extend the carbon nano-tube of arranging and realize in the carbon nano-tube film 110.
Particularly, most carbon nano-tube of extending substantially in the same direction in the described carbon nano-tube film 110, and nisi linearity, bending that can be suitable; Perhaps be not fully according to arranging on the bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between the carbon nano-tube arranged side by side in most carbon nano-tube of extending substantially in the same direction of carbon nano-tube film 110 and may have the part contact.
See also Fig. 8, particularly, described carbon nano-tube film 110 comprise a plurality of continuously and the carbon nano-tube fragment 143 that aligns.This a plurality of carbon nano-tube fragment 143 joins end to end by Van der Waals force.Each carbon nano-tube fragment 143 comprises a plurality of carbon nano-tube that are parallel to each other 145, and this a plurality of carbon nano-tube that is parallel to each other 145 is combined closely by Van der Waals force.This carbon nano-tube fragment 143 has arbitrarily length, thickness, homogeneity and shape.Carbon nano-tube 145 in this carbon nano-tube film 110 is arranged of preferred orient in the same direction.Carbon nano tube line in this carbon nano-tube film 110 is by 143 end to end compositions of described carbon nano-tube fragment.Overlap by carbon nano-tube between the adjacent carbon nano tube line.Can have the gap between carbon nano-tube in this carbon nano-tube film 110, thereby make the thickness in these carbon nano-tube film 110 thickness be about 0.5 nanometer to 100 micron, be preferably 0.5 nanometer to 10 micron.
Pulling the concrete grammar that obtains described carbon nano-tube film 110 from carbon nano pipe array comprises: (a) selected carbon nano-tube fragment 143 from a carbon nano pipe array, present embodiment are preferably and adopt adhesive tape or adherent base bar with one fixed width to contact this carbon nano pipe array with a selected carbon nano-tube fragment 143 with one fixed width; (b) by mobile this stretching tool, pull this selected carbon nano-tube fragment 143 with certain speed, thereby end to endly pull out a plurality of carbon nano-tube fragments 143, and then form a continuous carbon nano-tube film 110.These a plurality of carbon nano-tube make this carbon nano-tube fragment 143 have one fixed width mutually side by side.When this chosen carbon nano-tube fragment 143 under the pulling force effect when pulling the growth substrate that direction breaks away from carbon nano pipe array gradually, because van der Waals interaction, other carbon nano-tube fragment 143 adjacent with this selected carbon nano-tube fragment 143 one after the other is drawn out end to end, thereby forms one continuously, evenly and the carbon nano-tube film 110 with one fixed width and preferred orientation.Described carbon nano-tube film 110 has minimum electrical impedance at draw direction, and in that have maximum resistance perpendicular to draw direction anti-, thereby possesses electrical impedance anisotropy, be that carbon nano-tube film 110 has impedance anisotropy, namely, carbon nano-tube film 110 has different resistance at two different directions, be basically parallel to the carbon nano-tube bearing of trend to define one than Low ESR direction D(), and one higher resistance direction H(be basically perpendicular to the carbon nano-tube bearing of trend), wherein can be vertical than Low ESR direction D with higher resistance direction H.Carbon nano tube line in this carbon nano-tube film 110 also has impedance anisotropy, and the direction of parallel this carbon nano tube line is than Low ESR direction D, and vertically the direction of this carbon nano tube line is higher resistance direction H.Carbon nano-tube film 110 can be rectangle, and has four side, is sequentially side 112, side 114, side 116 and side 118.Side 112 and side 116 are relative and be parallel to higher resistance direction H, and side 114 and side 118 are relatively and be parallel to than Low ESR direction D.Owing to have impedance anisotropy, this carbon nano-tube touch function layer 100 can be realized multiple point touching is carried out sensing.The impedance anisotropy scope that is used for the carbon nano-tube film 110 of carbon nano-tube touch function layer 100 is preferably this higher resistance direction H and should than the ratio of Low ESR direction D more than or equal to 50, be preferably 70～500.
This carbon nano-tube touch function layer 100 can comprise a plurality of carbon nano-tube films 110, and is mutually stacking or be arranged side by side, so length and the width of above-mentioned electric paper display are not limit, and can arrange according to actual needs.In addition, this carbon nano-tube film 110 has a desirable penetrability, and visible light transmissivity is greater than 85%.
These a plurality of driving sensing electrodes 120 are disposed at the side 112 of carbon nano-tube film 110.Each drives sensing electrode 120 and connects at least one relative carbon nano tube line and a plurality of carbon nano tube lines of adjacency.Each drives the length W1 that sensing electrode 120 prolonging on the higher resistance direction H and can be between 1 mm to 8 mm, and the spacing W2 of adjacent driven sensing electrode 120 can be between 3 mm to 5 mm.Thus, each drive that sensing electrode 120 inputs to carbon nano-tube film 110 or be received from a signal of carbon nano-tube film 110 will be mainly along transmitting than Low ESR direction D.This carbon nano-tube touch function layer 100 just can utilize the signal transmission to have the characteristic of directivity as the basis for estimation of touch position.Certainly, in the product of reality, each drives the size of sensing electrode and application that spacing can be looked the required resolution of product and product and is different.That is to say that numerical value described above is not to limit the present invention for the usefulness that illustrates only.
In detail, carbon nano-tube touch function layer 100 can further comprise one drive circuit 130, and driving circuit 130 is connected to small part or whole driving sensing electrodes 120.In fact driving circuit 130 can be reached by various component design and annexation, below will illustrate a kind of enforcement aspect of circuit design.But, the following description is not to limit the present invention.In addition, in the present embodiment, a so-called assembly only represents to have and a kind ofly has certain function or the arrangement of components of character in carbon nano-tube touch function layer 100, but not represents the quantity of this assembly.That is to say that above-mentioned one drive circuit 130 can only be made of single driving circuit 130, and a single driving circuit 130 can be connected to each driving sensing electrode 120 seriatim through designs such as suitable tupe or multiplexers.But, the quantity of driving circuit 130 also can be a plurality of, and each driving circuit 130 can connect a driving sensing electrode 120 one to one, or one-to-many ground connects a plurality of driving sensing electrodes 120.In addition, present embodiment is in order to make the clear driving circuit 130 that only illustrated of drawing be connected to one and drive sensing electrode 120, but in fact as shown in the above description, has several at least or whole driving sensing electrodes 120 can be connected to driving circuit 130.
In the present embodiment, driving circuit 130 comprises a ground unit 132 and one scan unit 134, wherein scanning element 134 comprises a charging circuit C, a storage circuit P and a reading circuit R, and wherein charging circuit C is in parallel with storage circuit P, and reading circuit R is connected to storage circuit P.
In addition, driving circuit 130 for example is provided with four change-over switches, and it is respectively interrupteur SW 1, interrupteur SW 2, interrupteur SW 3 and interrupteur SW 4.Whether conducting is to driving sensing electrode 120 in order to the charging circuit C in the gated sweep unit 134, storage circuit P and reading circuit R for interrupteur SW 1.And in scanning element 134, whether interrupteur SW 2 is connected to interrupteur SW 1 in order to control charging circuit C, and interrupteur SW 3 is then in order to control storage circuit P and whether reading circuit R is connected to interrupteur SW 1.In addition, interrupteur SW 4 is arranged in the ground unit 132 in order to control and drives whether ground connection of sensing electrode 120.
In the present embodiment, the type of drive of carbon nano-tube touch function layer 100 for example is the signal of the driving sensing electrode 120 that is scanned with reception of turntable driving sensing electrode 120 step by step.At this, so-called step by step scanning refer to drive sensing electrode 120 can batch ground or one by one with scanning element 134 conductings.When one of them drives sensing electrode 120 with scanning element 134 conducting, other driving sensing electrode 120 all can with ground unit 132 conductings.In addition, scanning sequency of the present invention is not necessarily according to driving the arrangement position of sensing electrode 120 in the space.For instance, driving sensing electrode 120 shown in Figure 1 can by left and right, by right and a left side, one at interval, the interval is a plurality of or be scanned according to the order without ad hoc rules.
In detail, the driving sensing electrode 120 of carbon nano-tube touch function layer 100 for example sequentially is arranged as electrode X1, electrode X2, electrode X3, electrode X4, electrode X5, electrode X6, electrode X7 and electrode X8.Under the design of present embodiment, make electrode X3 and scanning element 134 conductings, then the interrupteur SW in the scanning element 134 1 needs the interrupteur SW 4 in conducting and the ground unit 132 to need to disconnect.In addition, in the time of making electrode X3 and ground unit 132 conducting, then the interrupteur SW 1 in the 4 meeting conductings of the interrupteur SW in the ground unit 132 and the scanning element 134 can disconnect.At this, ground unit 132 for example is to be connected to an earthing potential or a current potential of fixing or the assembly of a high impedance.
For instance, shown in Figure 2 is the drive waveforms synoptic diagram of each change-over switch when scanning in the driving circuit of one embodiment of the invention.Please refer to Fig. 2, from top to bottom be sequentially the drive waveforms of interrupteur SW 1, interrupteur SW 2, interrupteur SW 3 and interrupteur SW 4 in the waveform shown in Figure 2.The time that time T 1 is carried out for scanning motion.In addition, in the present embodiment, interrupteur SW 1 ~ SW4 corresponding to the time representation of high levle is switched on (namely opening turn on) in each drive waveforms, the time of low level represents that then corresponding interrupteur SW 1 ~ SW4 is disconnected (namely closing turn off).
Please be simultaneously with reference to Fig. 1 and Fig. 2, in the time T 1, interrupteur SW 1 is switched on, and interrupteur SW 4 is disconnected.So corresponding driving sensing electrode 120 is understood with scanning element 134 conductings to scan and sensing.In addition, in the time T 1, interrupteur SW 2 and interrupteur SW 3 alternately one are switched on, and another one is disconnected.In the present embodiment, interrupteur SW 2 is respectively T2 and T3 with the time that interrupteur SW 3 is switched on, and after interrupteur SW 2 was disconnected, interrupteur SW 3 can postpone a period of time t1 and just be switched on.Thus, in time T 1, corresponding driving sensing electrode 120 will alternately be connected to charging circuit C and storage circuit P.In one embodiment, time T 1 for example is 20 microseconds (μ s), and time T 2 for example is 0.3 microsecond with time T 3, and time t1 then for example is 0.025 microsecond.But, with different type of drive, time T 3 is time T 2 and then also, that is time t1 can be zero.In brief, the length of these times determines when looking the factor such as the ability of driving circuit 130 and actual product size.
With present embodiment, charging circuit C for example connects a voltage source (not shown), and storage circuit P then for example connects an external capacitive Cout.When electric paper display is touched with finger or conducting medium by the user, can produce a hand capacity between carbon nano-tube film 110 and the finger (or conducting medium).At this moment, charging circuit C and storage circuit P will alternately discharge and recharge hand capacity.Reading circuit R just can read the charge volume of hand capacity in the time T 1, and magnitude of voltage for example is with the basis for estimation as touch position.In the present embodiment, above-mentioned design only is a kind of practice mode of driving circuit 130.In other embodiments, driving circuit 130 can be comprised of other functional unit.That is to say that every can being connected to drives sensing electrode 120 can become driving circuit 130 with the circuit design that determines hand capacity topological design.
Please continue with reference to Fig. 1, in a simulation test, contact area that touch action causes each time for example is preset as 5 mm * 5 mm, and set external capacitive Cout for example is 100 pf among the storage circuit P.In addition, in this simulation test, will carry out the emulation of nine touch position, and the central point of these touch position for example is position I ~ position IX, position I ~ position III aligning electrodes X4 wherein, position IV ~ position VI is offset towards electrode X5 by position I ~ position III respectively, and position VII ~ position IX is offset towards electrode X5 by position IV ~ position VI respectively.And in this experiment, the distance between position VII ~ position IX and the electrode X4 is set equal to the distance between position VII ~ position IX and the electrode X5.
Fig. 3 is extremely shown in Figure 5 to be under the simulation test, the signal that electrode X3 to X6 is received.Please first simultaneously with reference to Fig. 1 and Fig. 3, the carbon nano-tube film 110 of present embodiment has impedance anisotropy, so the path transmission of electric current will mainly be parallel to than Low ESR direction D.When position I was touched, the received signal of electrode X3 ~ X6 (namely reading circuit R read voltage) was in fact shown in Fig. 3 middle polyline 310.When position II and position III are touched, the received signal of electrode X3 ~ X6 then respectively such as Fig. 3 middle polyline 320 with shown in the broken line 330.
Though position I ~ position III is aligning electrodes X4 similarly, can produce different signals, when wherein position III is touched, the signal minimum that electrode X4 is received.In this emulation, nearer with the distance that drives sensing electrode 120 as touch position I ~ IX, the received signal of corresponding driving sensing electrode 120 is larger.So the numerical values recited of the signal that carbon nano-tube touch function layer 100 can self-driven sensing electrode 120 receives judges that touch position is than the coordinate on the Low ESR direction D.
Then, please refer to Fig. 4, the signal that electrode X3 received to electrode X6 when broken line 340 ~ broken line 360 was sequentially touch position and is positioned at position IV ~ position VI.Since position IV ~ position VI respectively with respect to position I ~ position III towards electrode X5 skew, the action that electrode X4 and electrode X5 can discharge and recharge hand capacity.But, touch a little that the received signal of electrode X4 can be higher than the received signal of electrode X5 when position IV ~ position VI.
Similarly, please refer to Fig. 5, the signal that electrode X3 received to electrode X6 when broken line 370 ~ broken line 390 was sequentially touch position and is positioned at position VII ~ position IX.At this, touch position is positioned at position VII ~ position IX wherein during one, and electrode X4 can receive identical signal in fact with electrode X5.By the signal relation of Fig. 3 to Fig. 5 as can be known, if will judge touch position at the coordinate of higher resistance direction H, can be more adjacent three drive the received signal of sensing electrodes 120.For example, judge that touch position is at the coordinate of higher resistance direction H, can take out adjacent three and drive in the received signal of sensing electrodes 120, higher both signal value, and with this both signal value obtains corresponding coordinate figure with interpolation or with a proportionate relationship addition.Proportionate relationship described herein can be based on the variation of signal value received in the simulation process and is determined.
Particularly, after carbon nano-tube touch function layer 100 completes, can carry out l-G simulation test in each position according to required resolution and drive the received signal of sensing electrode 120 corresponding to the variation relation of different touch position in the hope of each.This relation built on drive when namely can be used as in the future user's practical operation carbon nano-tube touch function layer 100 in the sensor chip, judge the foundation of touch position.
The carbon nano-tube film 110 of present embodiment has impedance anisotropy, makes and respectively drives the distance that sensing electrode 120 received signals can directly reflect touch position.Therefore, carbon nano-tube touch function layer 100 has better sensing accuracy.In addition, carbon nano-tube touch function layer 100 can electrode receives the numerical value of signal and the numerical value of comparison adjacent electrode received signal is made touch position by directly reading, and does not need complicated driving method and calculation program.Generally, the carbon nano-tube touch function layer 100 that proposes of present embodiment is with simple in structure, sensing accuracy height and the easy characteristics of driving method.
This functional layer 20 can further comprise an anti-glare layer 200, and this carbon nano-tube touch function layer 100 can be arranged between this anti-glare layer 200 and this first bonding coat 30, and this anti-glare layer 200 directly covers this carbon nano-tube film 110.This anti-glare layer 200 comprises primary antibodie dazzle substrate and is arranged at the anti-glare film of this anti-dazzle upper surface of substrate.This anti-glare film contains particle, and this anti-glare film surface has by the coalescent of this particle or the formed meticulous irregularity of its analog.The material of this anti-dazzle substrate can be transparent plastic, such as tri acetyl cellulose (TAC), polyester (TPEE), polyethylene terephthalate (PET), polyimide (PI), polyamide (PA), aromatic poly amide, tygon (PE), polyacrylate (PAR), polyethersulfone, polysulfones, polypropylene (PP), diacetyl cellulose, Polyvinylchloride, acrylic resin (PMMA), polycarbonate (PC), epoxy resin, carbamide resin, carbamate resins and melamine resin.The thickness of this anti-dazzle substrate can be 20 microns to 100 microns, but is not limited to this scope.This anti-glare film contains described particle and resin.In addition, this anti-glare film optionally can further comprise such as adjuvants such as light stabilizer, ultraviolet light absorber, antistatic agent, fire retardant, antioxidants.This particle is mainly coalescent on the copline direction of anti-glare film, coalescent to take this forming two dimension, thereby can produce continuously and relax the meticulous irregularity of fluctuation on the anti-glare film surface, therefore the desirable level of anti-dazzle characteristic and contrast can be met simultaneously.The arithmetic average roughness Ra of the roughness curve that observes on the anti-glare film surface is 0.05 micron to 0.5 micron.The arithmetic average roughness Ra of roughness curve can make anti-dazzle characteristic degradation less than 0.05 micron, and can make the contrast degradation above 0.5 micron.
In the present embodiment, described carbon nano-tube film 110 is set directly at the lower surface of the anti-dazzle substrate of this anti-glare layer 200.This first bonding coat 30 directly contacts with this carbon nano-tube film 110 and is bonding, thereby this anti-glare layer 200, this carbon nano-tube film 110 are fixedly connected with this electric pole plate 620.
This electronic-paper display screen 10 is existing electrophoretic display panel, can be but is not limited to a kind of in microcapsules (micro-capsule) type electrophoretic display panel, little cup (micro cup electrophoretic) type electrophoretic display panel, screw (gyricon bead) type electrophoretic display panel, dividing plate (partition) the type electrophoretic display panel.
This electronic-paper display screen 10 comprises lower electrode plate 610, electrophoretic display medium layer 630 and electric pole plate 620 from bottom to up successively.This electrophoretic display medium layer 630 is arranged between this electric pole plate 620 and the lower electrode plate 610.This electric pole plate 620 comprises upper substrate 622 and is arranged at the common electrode layer 624 of the lower surface of this upper substrate 622 that this lower electrode plate 610 comprises infrabasal plate 612 and is arranged at the pixel electrode layer 614 of the upper surface of this infrabasal plate 612.These electrophoretic display medium layer 630 contacts also are fitted between this common electrode layer 624 and the pixel electrode layer 614.The upper surface of this upper substrate 622 is the display surface of electronic-paper display screen 10.
This electric pole plate 620, electrophoretic display medium layer 630 and lower electrode plate 610 common formation display layers.The material of the upper substrate 622 of this electric pole plate 620 and the infrabasal plate 612 of this lower electrode plate 610 can be transparent hard material or flexible material, such as glass, quartz, plastics or resin, and can be identical with the material of the anti-dazzle substrate of described anti-glare layer 200.The common electrode layer 624 of this electric pole plate 620 has preferably transparency and electric conductivity, and material can be tin indium oxide (ITO), conducting polymer or carbon nanotube layer.This carbon nanotube layer comprises a plurality of equally distributed carbon nano-tube, and these a plurality of carbon nano-tube can lack of alignment or are arranged of preferred orient along equidirectional.The pixel electrode layer 614 of this lower electrode plate 610 comprises a plurality of film crystal pipe electrodes.This electrophoretic display medium layer 630 can comprise bistable electric ink display medium.In the microcapsule-type electrophoretic display panel, this electrophoretic display medium layer 630 comprises microcapsules formula electrophoretic display medium, and this electrophoretic display medium layer 630 comprises a plurality of microcapsules, is packaged with some the first electrophoresis ions and the second electrophoresis ion in each microcapsules.When being added with voltage between described common electrode layer 624 and the pixel electrode layer 614, these microcapsules show under electric field action.This electrophoretic display medium layer 630 all can be combined by cementing agent between this pixel electrode layer 614 and common electrode layer 624.This electronic-paper display screen 10 can further comprise the display drive circuit (not shown), drives for this common electrode layer 624 and pixel electrode layer 614 provide voltage.
In use, the demonstration of the electronic-paper display screen 10 that user one side visual confirmation arranges below carbon nano-tube touch function layer 100, on one side by touch objects, the upper surface that touches this touch control e paper display 500 such as finger operates.This carbon nano-tube touch function layer 100 and this electronic-paper display screen 10 all need input electrical signal to drive.Because this carbon nano-tube touch function layer 100 relies on the hand capacity between sensing finger and the carbon nano-tube film 110 to judge the position of touch point, and the common electrode layer 624 of these electronic-paper display screen 10 upper ends can produce a larger background capacitance when work, and the sensing of 100 pairs of touch point electric capacity of carbon nano-tube touch function layer is affected.For addressing this problem, can make between the common electrode layer 624 of this electronic-paper display screen 10 and this carbon nano-tube touch function layer 100 and have effective spacing distance, this distance matches with the capacitance sensing characteristic of this carbon nano-tube film 110, makes carbon nano-tube touch function layer 100 can effectively tell the surface capacitance that the touch point produces from background capacitance.Particularly, distance between the common electrode layer 624 of this electronic-paper display screen 10 and this carbon nano-tube touch function layer 100 should be greater than 100 microns, the upper limit of this distance is not limit, can have wider scope, as long as make this touch control e paper display 500 satisfy practical thickness, and have suitable penetrability and get final product, for example, the distance between the common electrode layer 624 of this electronic-paper display screen 10 and this carbon nano-tube touch function layer 100 can be less than or equal to 2 millimeters.This distance is preferably 125 microns to 800 microns.For satisfying this requirement, the thickness of the upper substrate 622 of present embodiment by this electronic-paper display screen 10 is set realizes that for example, the thickness of the upper substrate 622 of this electronic-paper display screen 10 is greater than 100 microns and be less than or equal to 800 microns.
This first bonding coat 30 is arranged between this functional layer 20 and this electric pole plate 620, specifically is arranged at the upper surface of this upper substrate 622, is used for this functional layer is fixed in this electric pole plate 620.The material of this first bonding coat 30 is transparent OCA optical cement or UV glue etc.
See also Fig. 9, second embodiment of the invention provides a kind of touch control e paper display 510, and it comprises electronic-paper display screen 10, the first bonding coat 30 and functional layer 20 from bottom to up successively.The touch control e paper display 500 of the structure of this touch control e paper display 510 and this first embodiment is basic identical, and it is distinguished in this functional layer 20.This functional layer 20 comprises a transparent insulation wall 190, a carbon nano-tube touch function layer 100 and an anti-glare layer 200 from bottom to up successively.This transparent insulation wall 190 has a upper surface and a lower surface, the carbon nano-tube film 110 of this carbon nano-tube touch function layer 100 is arranged at the upper surface of this transparent insulation wall 190, and this first bonding coat 30 is arranged at the lower surface of this transparent insulation wall 190.This transparent insulation wall 190 is arranged between this electronic-paper display screen 10 and this carbon nano-tube touch function layer 100.
The material of this transparent insulation wall 190 can be transparent hard material or flexible material, such as glass, quartz, plastics or resin, and can be identical with the material of the anti-dazzle substrate of described anti-glare layer 200.In the present embodiment, the material of this transparent insulation wall 190 is polycarbonate (PC).The thickness of this transparent insulation wall 190 is greater than 100 microns and be less than or equal to 800 microns, has enough large distance thereby make between the common electrode layer 624 of this carbon nano-tube touch function layer 100 and this electronic-paper display screen 10.
See also Figure 10, third embodiment of the invention provides a kind of touch control e paper display 520, and it comprises electronic-paper display screen 10, the first bonding coat 30 and functional layer 20 from bottom to up successively.The touch control e paper display 510 of the structure of this touch control e paper display 520 and this second embodiment is basic identical, and it is distinguished in this functional layer 20.This functional layer 20 also further comprises waterproof gas-bearing formation 410 except comprising transparent insulation wall 190, carbon nano-tube touch function layer 100 and anti-glare layer 200.
This waterproof gas-bearing formation 410 can be arranged between two-layer in this transparent insulation wall 190, carbon nano-tube touch function layer 100 and the anti-glare layer 200, perhaps is arranged between this transparent insulation wall 190 and this electronic-paper display screen 10.The material of this waterproof gas-bearing formation 410 is transparent and can stop aqueous vapor to be passed through, be specifically as follows rubber, fluororesin (fluororesin), polychlorotrifluoroethylene (polychlorotrifluoroethylene, PCTFE) or poly-trifluoro-ethylene (polytrifluoroethylene).The thickness of this waterproof gas-bearing formation 410 can be 0.5 millimeter to 0.05 millimeter, is preferably 0.1 millimeter.This aqueous vapor can be water vapour or moisture.
Further, this functional layer 20 can further comprise one second bonding coat 400.The material of this second bonding coat 400 is identical with the material of this first bonding coat 30.This second bonding coat 400 can be arranged between two-layer in this transparent insulation wall 190, carbon nano-tube touch function layer 100, anti-glare layer 200 and the waterproof gas-bearing formation 410.
In the present embodiment, this functional layer 20 comprises a waterproof gas-bearing formation 410, a transparent insulation wall 190, a carbon nano-tube touch function layer 100, one second bonding coat 400 and an anti-glare layer 200 from bottom to up successively.This transparent insulation wall 190 has a upper surface and a lower surface, the carbon nano-tube film 110 of this carbon nano-tube touch function layer 100 is arranged at the upper surface of this transparent insulation wall 190, and this waterproof gas-bearing formation 410 is arranged at the lower surface of this transparent insulation wall 190.This second bonding coat 400 is arranged between this anti-glare layer 200 and this carbon nano-tube film 110, and this carbon nano-tube film 110 is combined with the anti-dazzle substrate of this anti-glare layer 200.
The present invention's touch control e-paper display has carbon nano-tube touch function layer, solve metal on the known touch-screen or the problem of ITO circuit stop portions light because of carbon nano-tube material and the thin characteristic of layer, moreover, because the carbon nano tube line in the carbon nano-tube film has impedance anisotropy and spacing is fine and closely woven, can significantly improve the sensing precision of electric paper display.Further, owing to have enough spacing distances between the common electrode layer of this electronic-paper display screen and this carbon nano-tube touch function layer, thereby avoid causing the excessive sensing to touch point electric capacity of background capacitance to exert an influence because of the work of this electronic-paper display screen 10.
In addition, those skilled in the art also can do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (20)
1. touch control e paper display, comprise an electronic-paper display screen and a functional layer, this electronic-paper display screen comprises a common electrode layer, and has a display surface, this functional layer is arranged at this display surface, it is characterized in that, described functional layer further comprises a carbon nano-tube touch function layer, described carbon nano-tube touch function layer is arranged on this display surface, and the distance between this common electrode layer and this carbon nano-tube touch function layer is greater than 100 microns and be less than or equal to 2 millimeters.
2. touch control e paper display as claimed in claim 1, it is characterized in that, this electronic-paper display screen comprises lower electrode plate, electrophoretic display medium layer and electric pole plate, this electrophoretic display medium layer is arranged between this electric pole plate and the lower electrode plate, this electric pole plate comprises upper substrate and is arranged at the described common electrode layer of the lower surface of this upper substrate, this lower electrode plate comprises infrabasal plate and is arranged at the pixel electrode layer of the upper surface of this infrabasal plate that the thickness of this upper substrate is greater than 100 microns and be less than or equal to 800 microns.
3. touch control e paper display as claimed in claim 1, it is characterized in that, described functional layer further comprises a transparent insulation wall, this transparent insulation wall is arranged between this electronic-paper display screen and this carbon nano-tube touch function layer, and the thickness of this transparent insulation wall is greater than 100 microns and be less than or equal to 800 microns.
4. touch control e paper display as claimed in claim 3 is characterized in that, the material of this transparent insulation wall is glass, quartz, plastics or resin.
5. touch control e paper display as claimed in claim 4 is characterized in that, the material of this transparent insulation wall is polycarbonate.
6. touch control e paper display as claimed in claim 3 is characterized in that, described functional layer further comprises an anti-glare layer, and described carbon nano-tube touch function layer is arranged between described anti-glare layer and the described electronic-paper display screen.
7. touch control e paper display as claimed in claim 6, it is characterized in that, described functional layer further comprises a waterproof gas-bearing formation, this waterproof gas-bearing formation is arranged between any two-layer in this transparent insulation wall, carbon nano-tube touch function layer and the anti-glare layer, perhaps is arranged between this transparent insulation wall and this electronic-paper display screen.
8. touch control e paper display as claimed in claim 7, it is characterized in that, described functional layer further comprises one second bonding coat, and this second bonding coat is arranged between any two-layer in this transparent insulation wall, carbon nano-tube touch function layer, anti-glare layer and the waterproof gas-bearing formation.
9. touch control e paper display as claimed in claim 1 is characterized in that, described carbon nano-tube functional layer comprises carbon nano-tube film and a plurality of driving sensing electrode, and these a plurality of driving sensing electrodes are electrically connected with this carbon nano-tube film.
10. touch control e paper display as claimed in claim 1 is characterized in that, described carbon nano-tube film has impedance anisotropy, comprises a Low ESR direction and a high impedance direction.
11. touch control e paper display as claimed in claim 10 is characterized in that, the ratio of described high impedance direction and Low ESR direction is 50～500.
12. touch control e paper display as claimed in claim 10 is characterized in that described carbon nano-tube film comprises a plurality of carbon nano-tube, these a plurality of carbon nano-tube are extended along this Low ESR direction substantially.
13. touch control e paper display as claimed in claim 12 is characterized in that, described a plurality of driving sensing electrodes are arranged on the side that described carbon nano-tube film is parallel to this high impedance direction.
14. touch control e paper display as claimed in claim 13 is characterized in that, respectively this driving sensing electrode is between 1 mm to 8 mm along the length of this higher resistance direction.
15. touch control e paper display as claimed in claim 13 is characterized in that, those spacings that drive sensing electrode are between 3 mm to 5 mm.
16. touch control e paper display as claimed in claim 13 is characterized in that, further comprises at least one driving circuit, is connected at least those driving sensing electrodes of part, to scan step by step at least those driving sensing electrodes of part.
17. touch control e paper display as claimed in claim 16, it is characterized in that, this driving circuit comprises a ground unit and one scan unit, is connected to this scanning element when respectively this driving sensing electrode is scanned, and is connected to this ground unit when not being scanned.
18. touch control e paper display as claimed in claim 17 is characterized in that, this scanning element comprises a charging circuit, a storage circuit and a reading circuit, and this charging circuit is in parallel with this storage circuit, and this reading circuit is connected to this storage circuit.
19. touch control e paper display as claimed in claim 16 is characterized in that the quantity of this driving circuit is a plurality of, each driving circuit connects one to one one and drives sensing electrode, or one-to-many ground connects a plurality of driving sensing electrodes.
20. touch control e paper display as claimed in claim 13, it is characterized in that, when this touch control e paper display is touched, touch position is nearer with the distance that drives sensing electrode, the received signal of corresponding driving sensing electrode is larger, and the numerical values recited of the signal that the self-driven sensing electrode of carbon nano-tube touch function layer receives judges that touch position is than the coordinate on the Low ESR direction.
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| CN201110259997.9A CN102981657B (en) | 2011-09-05 | 2011-09-05 | Touch type electronic paper display |
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| CN201110259997.9A CN102981657B (en) | 2011-09-05 | 2011-09-05 | Touch type electronic paper display |
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Effective date of registration: 20210425 Address after: Electronic Information Industrial Park, Gui'an New District, Guiyang City, Guizhou Province Patentee after: Guizhou Funa Yuanchuang Technology Co.,Ltd. Patentee after: Shih Hua Technology Ltd. Address before: 300457 Tianjin Binhai New Area Haiyun Tianjin economic and Technological Development Zone No. 80 Building No. 15 Street Patentee before: TIANJIN FUNAYUANCHUANG TECHNOLOGY Co.,Ltd. Patentee before: Shih Hua Technology Ltd. |
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