WO2014183375A1 - 电容式触摸屏、电容式触摸屏制备方法及显示装置 - Google Patents
电容式触摸屏、电容式触摸屏制备方法及显示装置 Download PDFInfo
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- WO2014183375A1 WO2014183375A1 PCT/CN2013/085268 CN2013085268W WO2014183375A1 WO 2014183375 A1 WO2014183375 A1 WO 2014183375A1 CN 2013085268 W CN2013085268 W CN 2013085268W WO 2014183375 A1 WO2014183375 A1 WO 2014183375A1
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- WO
- WIPO (PCT)
- Prior art keywords
- line
- touch
- touch sensing
- auxiliary electrode
- capacitive touch
- Prior art date
Links
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 238000002161 passivation Methods 0.000 claims description 29
- 239000011159 matrix material Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims 2
- 239000004973 liquid crystal related substance Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 239000010408 film Substances 0.000 description 13
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 9
- 238000000059 patterning Methods 0.000 description 9
- 230000008859 change Effects 0.000 description 6
- 210000002858 crystal cell Anatomy 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Definitions
- Embodiments of the present invention relate to a capacitive touch screen, a method of fabricating the capacitive touch screen, and a display device using the capacitive touch screen.
- TFT-LCD Thin Film Transistor-Liquid Crystal Display
- the TFT-LCD with touch function in the prior art can be divided into: an add on mode touch panel, an on cell touch panel, and an inline touch screen (In Cell). Touch Panel).
- the external touch screen is produced by separately separating the touch screen from the liquid crystal display, and then bonding them together to form a touch-sensitive liquid crystal display.
- the external touch screen has the disadvantages of high production cost, low light transmittance, and thick module.
- the in-cell touch panel embeds the touch electrode of the touch screen inside the liquid crystal display, which can reduce the thickness of the whole module, and can greatly reduce the manufacturing cost of the touch screen, and is favored by the major panel manufacturers.
- the existing capacitive in-cell touch screen is as shown in FIG. 1 , which is directly added to the existing array substrate by directly adding the touch scan line 6 and the touch sensing line 7 , that is, two Strip-shaped ITO (Indi-Tin Oxides, Indium Tin Oxide) transparent electrodes intersecting each other, the two layers of IT0 transparent electrodes are used as touch drive electrodes and touch sensing lines of the touch screen, respectively, in two IT0 transparent electrodes
- the junction of the different faces forms a coupling capacitor.
- the working process of the touch screen is: when loading the touch driving signal to the IT0 transparent electrode as the touch driving electrode, detecting the voltage signal that the touch sensing line is coupled through the coupling capacitor.
- the human body electric field acts on the coupling capacitor, causing the capacitance value of the coupling capacitor to change, thereby changing the touch.
- the voltage signal coupled by the sensing line is controlled, and the position of the contact can be determined according to the change of the voltage signal.
- the prior art capacitive in-cell touch panel has the following problems:
- the capacitance between the electrodes in the liquid crystal cell may affect the coupling capacitance when the touch is judged, thereby affecting the sensitivity and accuracy of the touch determination;
- the function of the gate line and the data line and the touch scan line and the touch sensor line used as the touch function are interlaced, the aperture ratio of the pixel is not only reduced, but also the process difficulty of preparing the touch liquid crystal display is increased, correspondingly Poor craftsmanship will also increase.
- Embodiments of the present invention provide an embedded capacitive touch screen, which can prevent the capacitance between the electrodes in the liquid crystal cell from affecting the coupling capacitance when the touch is judged, thereby increasing the sensitivity and accuracy of the touch determination and improving the user experience. Further, an embodiment of the present invention further provides a method of fabricating the capacitive touch screen and a display device using the capacitive touch screen.
- An aspect of the present invention provides a capacitive touch panel including a color film substrate and an array substrate disposed opposite to each other, wherein the array substrate is provided with a touch sensing line and a touch scan line that intersect each other; A touch sensing auxiliary electrode is disposed above the overlapping area of the touch sensing line and the touch scanning line; and the touch sensing auxiliary electrode is connected to the touch sensing line.
- the touch sensing line is located above the touch scan line; the color filter substrate is formed with a support pillar, and the touch sensing auxiliary electrode is formed on the surface of the color filter substrate and the support pillar And connected to the touch sensing line.
- the array substrate includes a plurality of pixel units defined by data lines and gate lines; the gate lines are the touch scan lines, and the data lines are the touch sensing lines.
- the array substrate is sequentially provided with a gate line, a gate insulating layer, and a data line; and the touch sensing auxiliary electrode is connected to the data line.
- a passivation layer is further disposed on the surface of the data line; a passivation layer via corresponding to the position and shape of the support pillar is formed on the passivation layer, and the touch sensing auxiliary electrode passes The passivation layer via is connected to the data line.
- a black matrix is disposed on the color filter substrate; the support pillar is located in a region corresponding to the black matrix, and the inductive auxiliary electrode does not exceed a region corresponding to the black matrix.
- the touch sensing auxiliary electrode is an IT0 transparent electrode or an IZ0 transparent electrode.
- a touch sensing auxiliary electrode is formed on the black matrix and the surface of the support post, and the touch sensing auxiliary electrode is connected to the data line on the array substrate.
- the capacitive touch screen preparation method further includes:
- the support pillar formed in the corresponding area of the black matrix corresponds to the pass position of the passivation layer; and the touch sensing auxiliary electrode is connected to the data line through the passivation layer via.
- Still another aspect of the present invention provides a display device including any of the above capacitive touch panels.
- FIG. 1 is a schematic structural view of a capacitive touch screen in the prior art
- FIG. 2 is a schematic top plan view of a capacitive touch screen according to Embodiment 1 of the present invention.
- Figure 3 is a cross-sectional view of the capacitive touch screen of Figure 2;
- FIG. 4 is a schematic top plan view of a capacitive touch screen according to Embodiment 2 of the present invention.
- Figure 5 is a cross-sectional view of the capacitive touch screen of Figure 4.
- the capacitive touch screen provided in this embodiment includes a color film substrate and an array substrate disposed opposite to each other, and the pixel substrate has pixel units defined by mutually intersecting data lines 25 and gate lines 24,
- the array substrate is further provided with a touch sensing line 27 and a touch scan line 26 that intersect each other for implementing a touch determination function.
- the touch sensing line 27 is usually located above the touch scanning line 26.
- a touch sensing auxiliary electrode 21 is disposed on the color film substrate above the overlapping area of the touch sensing line 27 and the touch scanning line 26, and the touch sensing auxiliary The electrode 21 is connected to the touch sensing line 27, so that when the finger touches the touch screen, the touch sensing auxiliary electrode acts on the touch sensing line 27 connected thereto, thereby causing the touch sensing line 27 and the touch scanning line 26 to be connected.
- the coupling capacitance changes, which in turn affects the change in the voltage signal. Therefore, by detecting the change in the voltage signal, the position of the contact can be determined.
- a color film layer corresponding to the pixel unit area is disposed on the color filter substrate, a black matrix 10 is disposed on the color film layer, and a support column 11 and one end of the support column 11 are formed on the color film substrate.
- the other end is in contact with the color filter substrate for controlling and maintaining the thickness of the liquid crystal cell; in order to prevent the support column 11 from affecting the liquid crystal orientation of the liquid crystal layer in contact with it, causing adverse effects such as light leakage and contrast reduction in the display area, support
- the column 11 is preferably disposed in a region corresponding to the black matrix 10.
- the support column may also be disposed at a position corresponding to other regions of the color filter substrate; the touch sensing auxiliary electrode 1 is formed in the color On the outer surface of the film substrate and the supporting column 11, the touch sensing auxiliary electrode 21 is integrally buckled on the support column 11 in a "top hat" shape, the brim portion is formed on the color filter substrate, and the bottom portion of the cap is connected to the touch sensing line 27.
- the above-mentioned brim portion preferably does not exceed the corresponding area of the black matrix 10 (not shown); Sensing line 27 connected to control, increasing the contact area of the touch sensing electrode 21 and the auxiliary touch sensing line 27.
- the manner in which the touch sensing auxiliary electrode 21 and the touch sensing line 27 are connected is not limited to this example.
- a lead wire may be disposed between the touch sensing auxiliary electrode 21 and the touch sensing line 27, so that the touch sensing auxiliary electrode 21 and the touch sensing line 27 are connected by wires or the like.
- the touch sensing auxiliary electrode 21 Since the touch sensing auxiliary electrode 21 is located in an area corresponding to the black matrix 10, the area is not used for the normal screen display of the display panel. Therefore, the touch sensing auxiliary electrode 21 may be formed of a transparent material or a metal, and may not be formed. Affects the normal display of the display panel. In this embodiment, the touch sensing auxiliary electrode 21 may be an Indium Tin Oxide (ITO) transparent electrode or an IZ0 (Indium Zinc Oxide) transparent electrode, or may be combined with ITO and IZ0. A transparent electrode, or other transparent electrode that can implement embodiments of the present invention. When the touch sensing auxiliary electrode 21 is formed of metal, the resistance can be effectively reduced.
- ITO Indium Tin Oxide
- IZ0 Indium Zinc Oxide
- the capacitive touch screen provided by the embodiment of the present invention has a touch sensing auxiliary electrode disposed above the overlapping area of the touch sensing line and the touch scanning line on the color film substrate, and the touch sensing auxiliary electrode and the touch Controlling the sensing line connection, so that when a finger touches the touch screen, the human body electric field directly acts on the touch sensing auxiliary electrode and the touch scanning line connected thereto, thereby avoiding the capacitance-to-touch determination between the electrodes in the liquid crystal cell
- the coupling capacitance at the time affects, thereby increasing the sensitivity and accuracy of the touch judgment, and finally achieving the effect of optimizing and improving the user experience.
- Embodiment 2 Embodiment 2
- the capacitive touch screen provided in this embodiment is as shown in FIG. 4 , and mainly includes a color film substrate and an array substrate disposed opposite to each other.
- the array substrate is provided with data lines 45 and gate lines 44 intersecting with the vertical and horizontal lines, and the data lines 45 and Gate line 44 defines a number of pixel cells.
- a touch sensing auxiliary electrode 41 is disposed on the color filter substrate above the overlapping area of the gate line 44 and the data line 45, and the touch sensing auxiliary electrode 41 is connected to the data line 45.
- the gate line 44 can serve as a touch sensing line at the same time, or the data line 45 can serve as a touch sensing line at the same time, or the gate line 44 serves as a touch scanning line at the same time and the data line 45 serves as a touch sensing line at the same time.
- the gate line 44 serves as a touch scan line at the same time and the data line 45 serves as a touch sense line at the same time.
- the touch scanning phase when a finger touch is applied, since the touch sensing auxiliary electrode 41 is connected to the data line 45, the electric field of the human body changes the overlapping capacitance between the data line 45 and the gate line 44, thereby affecting the voltage signal. Variety.
- the position of the contact can be determined.
- the grid line and the touch scan line are combined into one.
- the most intuitive effect is that the density of the line arrangement is greatly reduced, the pixel aperture ratio is increased, and the steps of the touch screen preparation process are reduced, since the touch scan line is not required to be provided. Reduced process difficulty and improved product yield.
- the gate line 44 is used for driving the display, it is also used to drive the touch determination. Therefore, only one gate line driver chip needs to be provided, and there is no need to additionally add a driver chip for the touch display, which saves cost and is convenient. Separate drive display phase and touch judgment phase.
- the time-sharing driving is performed so that the touch judgment phase is outside the display phase, thereby avoiding mutual interference between the two, increasing the accuracy of the touch judgment and the quality of the screen display.
- Combining the data line and the touch sensing line into one not only can share one data chip in the image display and touch judgment stages, no additional data chip is added for the touch display, the cost is saved, and the density of the line arrangement is further reduced.
- the pixel aperture ratio is increased, and the steps of the touch screen preparation process can be minimized, and the process difficulty is reduced.
- the color film substrate portion and the touch sensing auxiliary electrode 41 are similar to those in the first embodiment.
- a gate line 44, a gate insulating layer 42 over the gate line 44, a data line 45 over the gate insulating layer 42, and a passivation layer over the data line 45 for protecting the data line 45 are disposed on the array substrate.
- a passivation layer via 48 located above the overlap region of the data line 45 and the gate line 44 is formed on the passivation layer 43 and is passivated
- the layer via 48 corresponds to the position and shape of the support pillar 11
- the touch sensing auxiliary electrode 41 is connected to the data line 45 through the passivation layer via 48 .
- Embodiments of the present invention also provide a method for preparing the above capacitive touch screen, which mainly includes the steps of:
- a touch sensing auxiliary electrode 41 is formed on the outer surface of the black matrix 10 and the support pillar 11 by a patterning process, and the touch sensing auxiliary electrode 41 is connected to the data line 45 on the array substrate.
- the capacitive touch screen preparation method in this embodiment includes the steps of:
- a pattern including a gate line 44, a gate insulating layer 42, a data line 45, a pixel electrode 49, and a passivation layer 43 is formed on the first substrate by a patterning process;
- a passivation layer via 48 located above the overlap region of the gate line and the data line 45 is formed on the passivation layer 43 by a patterning process, thereby exposing a portion of the data line 45;
- the touch sensing auxiliary electrode 41 is formed on the outer surface of the black matrix 10 and the support pillar 11 by a patterning process, and the touch sensing auxiliary electrode 41 is connected to the data line 45 through the passivation layer via 48.
- the number of patterning processes can also be increased or decreased, and the third embodiment is selected.
- Embodiments of the present invention also provide a display device including the above capacitive touch screen.
- the above capacitive touch screen has a high pixel aperture ratio, good picture display quality, high-accuracy touch judgment, and a small number of preparation processes. Therefore, the display device including the above capacitive touch panel can enhance the user experience and is low in production cost.
- the above display device may be a product or component having any display function such as a liquid crystal display panel, an electronic paper, a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer or the like.
- a liquid crystal display panel an electronic paper
- a liquid crystal television a liquid crystal display
- a liquid crystal display a digital photo frame
- a mobile phone a tablet computer or the like.
- the above embodiments are merely illustrative of the present invention and are not to be construed as limiting the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Equivalent technical solutions are also within the scope of protection of the present invention.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US14/347,091 US9619089B2 (en) | 2013-05-15 | 2013-10-16 | Capacitive touch panel, manufacturing method of capacitive touch panel and display device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201310179042.1A CN103294312B (zh) | 2013-05-15 | 2013-05-15 | 电容式触摸屏、电容式触摸屏制备方法及显示装置 |
CN201310179042.1 | 2013-05-15 |
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WO2014183375A1 true WO2014183375A1 (zh) | 2014-11-20 |
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PCT/CN2013/085268 WO2014183375A1 (zh) | 2013-05-15 | 2013-10-16 | 电容式触摸屏、电容式触摸屏制备方法及显示装置 |
Country Status (3)
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US (1) | US9619089B2 (zh) |
CN (1) | CN103294312B (zh) |
WO (1) | WO2014183375A1 (zh) |
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CN103294312B (zh) | 2013-05-15 | 2016-04-20 | 京东方科技集团股份有限公司 | 电容式触摸屏、电容式触摸屏制备方法及显示装置 |
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CN103472966A (zh) * | 2013-09-23 | 2013-12-25 | 京东方科技集团股份有限公司 | 一种电容式内嵌触摸屏及显示装置 |
CN103677472B (zh) * | 2013-12-04 | 2016-06-29 | 京东方科技集团股份有限公司 | 触摸屏及其制造方法和显示装置 |
CN103700688B (zh) * | 2013-12-23 | 2016-03-30 | 京东方科技集团股份有限公司 | 彩膜基板及其制作方法、显示装置 |
CN103793120A (zh) * | 2014-01-28 | 2014-05-14 | 北京京东方光电科技有限公司 | 一种内嵌式触摸屏及显示装置 |
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CN104238815B (zh) | 2014-09-03 | 2018-03-06 | 合肥鑫晟光电科技有限公司 | 一种显示面板及其驱动方法、显示装置 |
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CN104553113A (zh) * | 2014-12-11 | 2015-04-29 | 业成光电(深圳)有限公司 | 声波式指纹识别组件及其制造方法 |
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CN107037628B (zh) * | 2017-06-19 | 2020-03-20 | 厦门天马微电子有限公司 | 一种显示面板和显示装置 |
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2013
- 2013-05-15 CN CN201310179042.1A patent/CN103294312B/zh not_active Expired - Fee Related
- 2013-10-16 US US14/347,091 patent/US9619089B2/en active Active
- 2013-10-16 WO PCT/CN2013/085268 patent/WO2014183375A1/zh active Application Filing
Patent Citations (4)
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CN102081486A (zh) * | 2010-12-21 | 2011-06-01 | 东南大学 | 一种电容式触摸感应器 |
CN102768604A (zh) * | 2012-06-29 | 2012-11-07 | 京东方科技集团股份有限公司 | 一种电容式内嵌触摸屏、其触摸定位方法及显示装置 |
CN103294312A (zh) * | 2013-05-15 | 2013-09-11 | 京东方科技集团股份有限公司 | 电容式触摸屏、电容式触摸屏制备方法及显示装置 |
CN203232406U (zh) * | 2013-05-15 | 2013-10-09 | 京东方科技集团股份有限公司 | 电容式触摸屏及显示装置 |
Also Published As
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CN103294312A (zh) | 2013-09-11 |
US20150153875A1 (en) | 2015-06-04 |
US9619089B2 (en) | 2017-04-11 |
CN103294312B (zh) | 2016-04-20 |
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