WO2016188216A1 - 触控显示面板及显示装置 - Google Patents

触控显示面板及显示装置 Download PDF

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Publication number
WO2016188216A1
WO2016188216A1 PCT/CN2016/077332 CN2016077332W WO2016188216A1 WO 2016188216 A1 WO2016188216 A1 WO 2016188216A1 CN 2016077332 W CN2016077332 W CN 2016077332W WO 2016188216 A1 WO2016188216 A1 WO 2016188216A1
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WIPO (PCT)
Prior art keywords
touch
display panel
array substrate
color filter
edge region
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Application number
PCT/CN2016/077332
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English (en)
French (fr)
Inventor
李彦辰
蔡佩芝
薛海林
王光泉
Original Assignee
京东方科技集团股份有限公司
北京京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 北京京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/306,896 priority Critical patent/US20170153733A1/en
Publication of WO2016188216A1 publication Critical patent/WO2016188216A1/zh

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    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • 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
    • 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
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch display panel and a display device.
  • the touch function of the touch display panel is generally implemented by the methods of “on-cell” and “in-cell”.
  • On-Cell refers to embedding the touch function component of the touch display panel on the color film substrate of the touch display panel.
  • In-Cell refers to embedding the touch function component of the touch display panel into the touch display panel. Between the array substrate and the color filter substrate.
  • the edge of the array substrate at the bottom of the touch display panel includes a step edge that is more than 3 mm beyond the edge of the color film substrate.
  • the color film substrate corresponding to the position is cut off, which reduces the utilization rate of the color film substrate.
  • Embodiments of the present invention provide a touch display panel and a display device, which implement a touch display panel including On-Cell or In-Cell touch functions and a touch that does not include On-Cell or In-Cell touch functions.
  • the display panel is compatible, and at the same time, the utilization of the color film substrate is improved.
  • a touch display panel includes: a stacked array substrate and a color filter substrate, the color filter substrate including a first edge region beyond an edge of the array substrate, on a predetermined surface of the first edge region Including an external pin, the external pin is connected to the touch control circuit.
  • the array substrate includes a second edge region beyond the edge of the color filter substrate, on the surface of the second edge region adjacent to the color filter substrate, Includes display driver chip.
  • the length of the first edge region beyond the edge of the array substrate is from 0.8 mm to 1.5 mm.
  • the predetermined surface is a surface of the first edge region away from the array substrate
  • the touch film layer is disposed on the surface of the color filter substrate remote from the array substrate, which is configured to implement a touch function.
  • the external pin is electrically connected to the touch trace of the touch film layer.
  • a polarizer is further disposed on the touch film layer.
  • the predetermined surface is a surface of the first edge region adjacent to the array substrate; and the surface of the color filter substrate adjacent to the array substrate includes a first touch electrode film layer.
  • the external pin is electrically connected to the electrode trace of the first touch electrode film layer.
  • the second touch electrode film layer is disposed on the array substrate; the electrodes of the first touch electrode film layer and the electrodes of the second touch electrode film layer are disposed to intersect.
  • a display device comprising the above touch display panel.
  • the touch display panel and the display device of the present invention cut off a portion of the color filter substrate at a corresponding position of the array substrate beyond the edge region of the color filter substrate, and retain the color filter substrate beyond the edge region of the array substrate.
  • An external pin is disposed on the edge region to connect the touch control circuit (disposed in the touch flexible circuit) to implement the On-Cell or In-Cell touch function, thereby improving the utilization of the color film substrate.
  • FIG. 1 is a schematic structural view of a prior art On-Cell touch display panel
  • FIG. 2 is a schematic structural diagram of an On-Cell touch display panel according to a first embodiment of the present invention
  • FIG. 3 is a schematic plan view of an array substrate in the On-Cell touch display panel shown in FIG. 2;
  • FIG. 4 is a schematic plan view of a color filter substrate in the On-Cell touch display panel shown in FIG. 2;
  • FIG. 5 is a schematic plan view of the On-Cell touch display panel shown in FIG. 2;
  • FIG. 6 is a schematic structural diagram of an In-Cell touch display panel in the prior art
  • FIG. 7 is a schematic structural diagram of an In-Cell touch display panel according to a second embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a trace of a lateral electrode in an array substrate in the In-Cell touch display panel shown in FIG. 7;
  • FIG. 9 is a schematic view showing a trace of a vertical electrode in a color filter substrate in the In-Cell touch display panel shown in FIG. 7;
  • FIG. 10 is a schematic diagram of a lateral electrode and a longitudinal electrode trace in the In-Cell touch display panel shown in FIG. 7;
  • FIG. 1 is a schematic structural diagram of a prior art On-Cell touch display panel. As shown in Figure 1, In order to solder the display driving chip 12 and the main flexible circuit board 14 on the upper surface of the second edge region 18 (i.e., the surface of the array substrate 1 facing the color filter substrate 2), it is necessary to cut off the color filter substrate 2 at the corresponding position.
  • the touch flexible circuit board 24 is directly soldered on the color filter substrate 2, it is necessary to ensure that the edge of the color filter substrate 2 on the solder side has a sufficient distance from the effective display area, generally the distance is 2-2.5 mm, and for monitoring The welding state of the flexible circuit board 24 is controlled, and the array substrate 1 and the color filter substrate 2 corresponding to the position of the soldering area are required to ensure light transmission without forming any pattern.
  • the On-Cell touch function is added, the array substrate 1 is caused.
  • the distance from the edge to the effective display area is greatly increased. It is difficult to meet the above requirements by directly adding the On-Cell touch function without changing the design of the existing product.
  • FIG. 2 is a schematic structural view of an On-Cell touch display panel according to a first embodiment of the present invention.
  • 3 is a schematic plan view of an array substrate in the On-Cell touch display panel shown in FIG. 2.
  • 4 is a schematic plan view of a color filter substrate in the On-Cell touch display panel shown in FIG. 2.
  • an embodiment of the present invention provides a touch display panel comprising: a stacked array substrate 1 and a color filter substrate 2 formed after a pair of boxes, wherein the color filter substrate 2 includes an array beyond one side.
  • the first edge region 27 of the edge of the substrate 1 is provided with an external pin on a predetermined surface of the first edge region 27, and the touch pin flexible circuit board 24 is bound to the external pin, so that the external pin is connected to the touch control circuit. Due to the wide adoption of the flexible circuit board technology, in the touch display panel, the touch control circuit and the like can be disposed in the flexible circuit board, so that the device is miniaturized, light and thin, and flexible.
  • the predetermined surface of the first edge region 27 can be understood as the upper surface or the lower surface of the color filter substrate 2 of the first edge region 27, where the color film substrate 2 is away from the surface of the array substrate 1
  • the surface of the color filter substrate 2 is close to the surface of the array substrate 1 as a lower surface.
  • the touch display panel suitable for the In-Cell touch function, the In-Cell touch function The component is embedded between the array substrate 1 and the color filter substrate 1.
  • the portion of the color filter substrate 2 is cut off at a corresponding position of the array substrate 1 beyond the edge region of the color filter substrate 2, and the color filter substrate 2 is retained beyond the edge region of the array substrate 1 on the color filter substrate 2.
  • An external pin and a touch flexible circuit 24 are disposed on an edge region of the array substrate 1 to implement an On-Cell or In-Cell touch function, thereby improving the utilization ratio of the color filter substrate 2.
  • the touch display panel is disposed on the other side opposite to the side of the first edge region 27, and the array substrate 1 includes a second edge region 18 beyond the edge of the color filter substrate 2, and adjacent to the color filter substrate 2 of the second edge region 18.
  • a display driving chip 12 is provided on the upper surface.
  • the surface of the array substrate 1 close to the color filter substrate 2 is the upper surface
  • the surface of the array substrate 1 away from the color filter substrate 2 is the lower surface.
  • the first edge region 27 is beyond the array substrate.
  • the length of the 1 edge is set to be 0.8 mm to 1.5 mm, preferably set to 1 mm.
  • the material of the color filter substrate 2 in which the second edge region 18 is correspondingly cut off is effectively utilized, and is not required.
  • the specification of the color filter substrate 2 is changed, and the utilization ratio of the color filter substrate 2 is improved.
  • the lower surface of the color filter substrate 2 of the first edge region 27 (toward the surface of the array substrate) has no pattern, so that the color filter substrate 2 of the first edge region 27 has light transmissivity, which eliminates the need to change the array of existing products.
  • the substrate 1 and the color filter substrate 2 are designed to meet the light transmission conditions for monitoring the soldering state of the touch flexible circuit board 24.
  • the array substrate 1 includes: a pixel array (not shown) for controlling liquid crystal deflection, disposed on the upper surface of the array substrate 1 (ie, facing the surface of the color filter substrate 2); first anisotropic conductive
  • the glue 11 is disposed on the array substrate 1; the display driving chip 12 is soldered to the upper surface of the array substrate 1 through the first anisotropic conductive paste 11; the main flexible circuit board 14 is soldered to the second anisotropic conductive adhesive 13
  • the upper surface of the array substrate 1; the lower polarizer 15 is disposed on the lower surface of the array substrate 1, and has a defect at the second edge region 18.
  • the color filter substrate 2 includes: a color film pixel array (not shown) for controlling color, disposed on a lower surface of the color filter substrate 2 (ie, a surface facing the array substrate 1);
  • the electric layer 21 is disposed on the upper surface of the color filter substrate 2;
  • the touch film layer is formed on the transparent conductive layer 21 by a mask process, and has an On-Cell touch function; and an external pin for soldering the touch flexible circuit a plate 24, the external pin is disposed on a predetermined surface of the first edge region 27, the predetermined surface is away from the upper surface of the array substrate 1; and the upper surface of the color filter substrate 2 is provided with a touch
  • the touch film layer (not shown) of the control function is understood to be that the external pin is disposed on the first edge region 27, the touch film layer is disposed on the non-first edge region 27, and the touch film layer is The touch wire is electrically connected to the external pin, and the external pin is bound with the touch flexible circuit board 24; the upper polarizer 22 is
  • FIG. 5 is a schematic plan view of the On-Cell touch display panel shown in FIG. 2.
  • the plan view of the array substrate and the color filter substrate is as shown in FIG. 5.
  • the specific shape structure of the transparent conductive layer 21, the touch film layer, the external leads, the main flexible circuit board 14, and the touch flexible circuit board 24 is not used in this embodiment. Detailed instructions are given.
  • Fig. 5 is for illustration only, but does not limit the structure of each film layer.
  • the liquid crystal layer 3 includes: a liquid crystal (not shown); a PI alignment layer on the upper and lower surfaces of the liquid crystal; and is disposed between the array substrate 1 and the color filter substrate 2 for bonding the array substrate 1 and the color filter substrate 2, and is sealed The sealant 31 of the liquid crystal layer.
  • the color filter substrate 2 of the first edge region 27 is beyond the edge of the array substrate 1.
  • the length is set to be 0.8 mm to 1.5 mm, preferably set to 1 mm.
  • the length of the array substrate 1 of the second edge region 18 on the other side opposite to the side where the first edge region 27 is located is set to be more than 3 mm beyond the edge of the color filter substrate 2 to ensure that there is sufficient space for soldering the display driving chip. 12 and main flexible circuit board 14.
  • the On-Cell touch function is implemented by designing the first edge region 27, and only the first edge region 27 of a desired size is formed by setting the parameters of the cutter at the time of cutting, and the edge of the color filter substrate 2 is determined. Exceeding the length of the edge of the array substrate 1, there is no need to change the existing product design, and it has good compatibility with existing non-On-Cell products. For the same product, if the On-Cell touch function is not required, the On-Cell related process can be omitted and the color film substrate 2 of the first edge region 27 is not retained during cutting; if necessary, the On-Cell touch is required.
  • the On-Cell related process process can be performed and the color filter substrate 2 of the first edge region 27 is retained while being cut.
  • this method is also compatible with the current mainstream G/F/F (Glass-Film-Film) touch solution.
  • the In-Cell touch panel is divided into a self-capacitance and a mutual-capacitance mode.
  • the self-capacitance mode is that the lateral electrode (TX) and the vertical electrode (RX) respectively form a capacitance with the common electrode
  • the mutual capacitance mode is that the lateral electrode and the longitudinal electrode intersect each other.
  • the capacitance is formed, when detecting the size of the mutual capacitance, the lateral electrodes sequentially emit excitation signals, and the longitudinal electrodes simultaneously receive signals, thereby obtaining a distribution of capacitance values of the entire two-dimensional plane of the touch panel, thereby calculating each of the capacitances according to changes in capacitance Touch the coordinates of the point.
  • FIG. 6 is a schematic structural diagram of an In-Cell touch display panel in the prior art.
  • the prior art needs to separately provide lateral electrode traces for transmitting excitation signals on the array substrate 1 and the color filter substrate 2 and for receiving excitation.
  • the longitudinal electrode trace of the signal is connected to the array substrate 1 by a separate conductive strip on the color filter substrate 2 by separately providing an anisotropic conductive conductive paste between the array substrate 1 and the color filter substrate 2.
  • the driving and detecting of the longitudinal electrode capacitance signal is realized by the display driving chip 12 or the flexible circuit board soldered on the array substrate 1.
  • the fourth anisotropic conductive paste 32 is disposed between the array substrate 1 and the color filter substrate 2 for turning on the RX connection line (not shown) on the array substrate 1 and the color filter substrate.
  • RX line on 2 (not shown).
  • the RX traces on the color filter array substrate 2 are electrically connected via the fourth anisotropic conductive paste 32, the RX connection line, and the second anisotropic conductive paste 13 and the main flexible circuit board 14.
  • the longitudinal electrode traces on the color filter substrate 2 are connected to the array substrate 1 by the anisotropic conductive paste to realize the driving manner, and the layout space of the array substrate 1 is tight, and the array substrate 1 and the color filter substrate are affected.
  • FIG. 7 is a schematic structural diagram of an In-Cell touch display panel according to a second embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a trace of a lateral electrode in an array substrate in the In-Cell touch display panel shown in FIG. 7.
  • FIG. 9 is a schematic diagram of a trace of a vertical electrode in a color filter substrate in the In-Cell touch display panel shown in FIG. 7.
  • the color filter substrate 2 disposed in the first edge region 27 effectively utilizes the portion of the color filter substrate 2 in which the second edge region 18 is cut off, and the specification of the color filter substrate 2 is not required to be improved.
  • the utilization rate of the color filter substrate 2, and the touch flexible circuit board 24 for driving the vertical electrode traces are disposed on the lower surface of the color filter substrate 2 of the first edge region 27 (toward the surface of the array substrate), which does not It is affected by many factors such as the wiring space of the array substrate 1 , the fluctuation of the liquid crystal cell between the array substrate 1 and the color filter substrate 2, the uneven coating of the conductive adhesive, the size and density of the conductive particles in the conductive adhesive, and the like, thereby avoiding the longitudinal electrode routing.
  • the drive resistance is large and cannot be normally turned on.
  • the solution of the present embodiment reduces the resistance of the RX trace 25 and improves the driving and detecting capability of the RX trace 25 under the premise of ensuring the connectivity of the vertical electrode RX trace 25, thereby reducing the process of the In-Cell mutual-capacitive touch display panel.
  • the complexity, the yield of the product are improved, and the utilization rate of the color filter substrate 2 is also improved.
  • the array substrate 1 includes: a pixel array (not shown) for controlling liquid crystal deflection, disposed on an upper surface of the array substrate 1 (ie, a surface facing the color filter substrate 2); and a first anisotropic conductive paste 11,
  • the display driving chip 12 is soldered to the array substrate 1 through the first anisotropic conductive paste 11 and electrically connected with the TX connecting line 17 on the array substrate 1; the second anisotropic conductive adhesive is disposed on the array substrate 1; 13.
  • the main flexible circuit board 14 is soldered to the array substrate 1 through the second anisotropic conductive adhesive 13, and is electrically connected with the relevant connection line on the array substrate 1; the TX trace 16, It is disposed on the array substrate 1; the TX connection line 17 is disposed on the array substrate 1. As shown in FIG. 8, the TX trace 16 and the display driver chip 12 are electrically connected via the first anisotropic conductive paste 11 and the TX connection line 17.
  • a lower polarizer 15 (not shown in FIG. 7, not specifically shown in FIG. 2) is further disposed on the lower surface of the array substrate 1, and is missing at the second edge region 18.
  • the color filter substrate 2 includes: a color film pixel array (not shown in FIG. 7) for controlling color, disposed on a lower surface of the color filter substrate 2 (ie, a surface facing the array substrate 1); and a third anisotropic conductive paste 23, Provided on the color filter substrate 2; the color filter substrate 2 is disposed on the lower surface of the array substrate 1 a first touch electrode film layer including the RX trace 25; the touch flexible circuit board 24 is soldered to the color filter substrate 2 through the third anisotropic conductive paste 23 to make the first edge region on the color filter substrate 2
  • the external pins on the lower surface of the 27 are electrically connected to the electrode traces of the first touch electrode film layer, that is, the RX connection lines 26 and the RX traces 25 are electrically connected.
  • the RX trace 25 is disposed on the color filter substrate 2, and the RX connection line 26 is disposed on the color filter substrate 2.
  • the RX trace 25 and the touch flexible circuit board 24 are electrically connected via a third anisotropic conductive paste 23 and an RX connection line 26.
  • the liquid crystal layer 3 includes liquid crystal (not shown), and a sealant 31 disposed between the array substrate 1 and the color filter substrate 2 for bonding the array substrate 1 and the color filter substrate 2, and achieving liquid crystal layer sealing property. .
  • the upper edge of the color filter substrate 2 extends beyond the array substrate 1 to form a first edge region 27, and the first edge region 27 is coated with a third anisotropic conductive paste 23 and a solder touch flexible circuit.
  • the board 24 is provided with an RX connection line 26; at the lower edge of the touch display substrate, the lower edge of the array substrate 1 is beyond the color filter substrate 2 to form the second edge region 18, and various TFT arrays are disposed on the second edge region 18.
  • the signal lines and patterns (not shown), the first anisotropic conductive paste 11 and the second anisotropic conductive paste 13, the solder display driver chip 12 and the main flexible circuit board 14 and the TX connection line 17 are applied.
  • the display display driving chip 12 when detecting the mutual capacitance size, as the driving circuit of the TX trace 16, the display display driving chip 12 sequentially inputs an excitation signal to the TX trace 16, and at the same time, all the RX traces 25 simultaneously receive signals, thereby detecting all TXs.
  • the capacitance of the intersection of the trace 16 and the RX trace 25 calculates the coordinates of each touch point according to the amount of change of the capacitance, thereby implementing the touch function.
  • the touch display panel with the In-Cell touch function provided in this embodiment directly solders the touch flexible circuit board 24 for driving the RX trace 25 to the color filter substrate 2. Since the RX trace 25 is not required to be connected from the color filter substrate 2 to the array substrate 1 through the conductive adhesive, the compatibility of the existing touch display panel can ensure the connectivity of the RX trace 25 and reduce the RX.
  • the line 25 resistor, the driving and detecting capability of the RX line 25 can be avoided, and the high process complexity and low production yield of the touch display panel can be avoided due to the introduction of the In-Cell mutual-capacity touch function.
  • the display driving chip 12 and the touch flexible circuit board 24 are respectively disposed at the two ends of the array substrate 1 and the color filter substrate 2 behind the box, and it is not necessary to produce a new color film substrate, and no excessive color removal is required.
  • the film substrate improves the utilization rate of the color filter substrate 2.
  • FIG. 10 is a schematic diagram of a lateral electrode and a longitudinal electrode trace in the In-Cell touch display panel shown in FIG. 7.
  • FIG. The plan view of the array substrate 1 and the color filter substrate 2 is as shown in FIG. 10, and the TX trace 16 of the second touch electrode film layer on the upper surface of the array substrate 1 and the first touch electrode film on the color filter substrate 2
  • the RX traces of the layers are crossed.
  • the specific shape and structure of the RX trace 25, the RX connection line 26, the TX trace 16, the TX connection line 17, the main flexible circuit board 14, and the touch flexible circuit board 24 are not described in detail in this embodiment.
  • FIG. 10 is for example only, and does not limit the structure of each trace in the plan view of the touch display panel.
  • Embodiments of the present invention also provide a display device including the touch display panel as described above.
  • the display device in the embodiment of the present invention may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, and the like.

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Abstract

本发明的实施例公开了一种触控显示面板及显示装置，该触控显示面板包括：层叠的阵列基板和彩膜基板，彩膜基板包括超出阵列基板边缘的第一边缘区域，第一边缘区域的预定表面上包括外接引脚，外接引脚与触控控制电路连接。该触控显示面板在阵列基板超出彩膜基板的边缘区域的对应位置切除彩膜基板的一部分，并将彩膜基板超出阵列基板的边缘区域保留，在该边缘区域上设置外接引脚以连接触控控制电路，实现On-Cell或In-Cell触控功能，提高了彩膜基板的利用率。

Description

触控显示面板及显示装置
本申请要求2015年5月22日递交的中国专利申请第201510266757.X号的优先权，在此全文引用上述中国专利申请所公开的内容以作为本申请的一部分。
技术领域
本发明涉及显示技术领域，尤其涉及触控显示面板及显示装置。
背景技术
为了实现触控显示面板的薄型化和轻量化，将触控显示面板与液晶面板一体化的研究日渐盛行。目前，为了实现触控显示面板与液晶面板一体化，通常通过“盒上”(On-Cell)和“盒中”(In-Cell)的方法实现触控显示面板的触控功能。On-Cell是指将触控显示面板的触控功能组件嵌入到触控显示面板的彩膜基板的上方，In-Cell是指将触控显示面板的触控功能组件嵌入到触控显示面板的阵列基板和彩膜基板之间。
在采用On-Cell和In-Cell的方法时，为了焊接驱动芯片(IC)和主柔性电路板，在触控显示面板的底部的阵列基板的边缘，包括超出彩膜基板边缘3mm以上的台阶边，对应位置的彩膜基板会被切除，降低了彩膜基板的利用率。
发明内容
本发明的实施例提供了一种触控显示面板及显示装置，实现包括On-Cell或In-Cell触控功能的触控显示面板和不包括On-Cell或In-Cell触控功能的触控显示面板的兼容，同时，提高了彩膜基板的利用率。
根据本发明的第一方面，提供了一种触控显示面板，包括：层叠的阵列基板和彩膜基板，彩膜基板包括超出阵列基板边缘的第一边缘区域，第一边缘区域的预定表面上包括外接引脚，外接引脚与触控控制电路连接。
在本发明的实施例中，在与第一边缘区域所在侧相对的另一侧，阵列基板包括超出彩膜基板边缘的第二边缘区域，在第二边缘区域的邻近彩膜基板的表面上，包括显示驱动芯片。
在本发明的实施例中，第一边缘区域超出阵列基板边缘的长度为0.8mm～1.5mm。
在本发明的实施例中，预定表面为第一边缘区域的远离阵列基板的表面，在彩膜基板的远离阵列基板的表面上包括触控膜层，其被配置为实现触控功能。
在本发明的实施例中，外接引脚与触控膜层的触控走线电连接。
在本发明的实施例中，在触控膜层上还设置有偏光片。
在本发明的实施例中，预定表面为第一边缘区域的靠近阵列基板的表面；彩膜基板的靠近阵列基板的表面上包括第一触控电极膜层。
在本发明的实施例中，外接引脚与第一触控电极膜层的电极走线电连接。
在本发明的实施例中，阵列基板上包括第二触控电极膜层；第一触控电极膜层的电极和第二触控电极膜层的电极交叉设置。
根据本发明的第二方面，还提供了一种显示装置，包括如上的触控显示面板。
本发明的实施例提供的一种触控显示面板及显示装置，在阵列基板超出彩膜基板的边缘区域的对应位置切除彩膜基板的一部分，并将彩膜基板超出阵列基板的边缘区域保留，在该边缘区域上设置外接引脚以连接触控控制电路(设置于触控柔性电路中)，实现On-Cell或In-Cell触控功能，提高了彩膜基板的利用率。
附图说明
为了更清楚地说明本发明的实施例的技术方案，下面将对实施例的附图进行简要说明，应当知道，以下描述的附图仅仅涉及本发明的一些实施例，而非对本发明的限制，其中：
图1为现有技术的On-Cell触控显示面板的结构示意图；
图2为根据本发明第一实施例的On-Cell触控显示面板的结构示意图；
图3为图2所示的On-Cell触控显示面板中阵列基板的平面示意图；
图4为图2所示的On-Cell触控显示面板中彩膜基板的平面示意图；
图5为图2所示的On-Cell触控显示面板的平面示意图；
图6为现有技术中In-Cell触控显示面板的结构示意图；
图7为根据本发明第二实施例的In-Cell触控显示面板的结构示意图；
图8为图7所示的In-Cell触控显示面板中的阵列基板中横向电极的走线示意图；
图9为图7所示的In-Cell触控显示面板中的彩膜基板中纵向电极的走线示意图；
图10为图7所示的In-Cell触控显示面板中横向电极和纵向电极走线示意图；
元件列表：
1、阵列基板；2、彩膜基板；3、液晶层；11、第一各向异性导电胶；12、显示驱动芯片；13、第二各向异性导电胶；14、主柔性电路板；15、下偏光片；16、TX走线；17、TX连接线；18、第二边缘区域；21、透明导电层；22、上偏光片；23、第三各向异性导电胶；24、触控柔性电路板；25、RX走线；26、RX连接线；27、第一边缘区域；31、封框胶；32、第四各向异性导电胶。
具体实施方式
下面结合附图，对发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。
下面分别通过具体的实施例对On-Cell触控显示面板和In-Cell触控显示面板的具体结构进行详细说明。
图1为现有技术的On-Cell触控显示面板的结构示意图。如图1所示， 为了在第二边缘区域18的上表面(即阵列基板1朝向彩膜基板2的表面)上焊接显示驱动芯片12和主柔性电路板14，需要将对应位置的彩膜基板2切除。另外，在彩膜基板2上直接焊接触控柔性电路板24时需要保证焊接侧的彩膜基板2的边缘到有效显示区域有足够的距离，一般该距离为2-2.5mm，并且为了监控触控柔性电路板24的焊接状态，焊接区域对应位置的阵列基板1和彩膜基板2都需要保证透光而不能形成任何图形，这样，在增加On-Cell触控功能后，会使得阵列基板1的边缘到有效显示区域之间的距离大大增加。在不变更现有产品设计的基础上，直接增加On-Cell触控功能很难符合上述要求。
图2为根据本发明第一实施例的On-Cell触控显示面板的结构示意图。图3为图2所示的On-Cell触控显示面板中阵列基板的平面示意图。图4为图2所示的On-Cell触控显示面板中彩膜基板的平面示意图。
如图2所示，本发明的实施例提供了一种触控显示面板，包括：对盒后形成的层叠的阵列基板1和彩膜基板2，其中，彩膜基板2在一侧包括超出阵列基板1边缘的第一边缘区域27，第一边缘区域27的预定表面上设置有外接引脚，外接引脚上绑定有触控柔性电路板24，使得外接引脚与触控控制电路连接。由于柔性电路板技术的广泛采用，在触控显示面板中，触控控制电路等均可以设置在柔性电路板中，使得设备实现小型化、轻薄化以及柔性化。
可理解的是，上述第一边缘区域27的预定表面可以理解为第一边缘区域27的彩膜基板2的上表面或下表面，此处，以彩膜基板2远离阵列基板1的表面为上表面，以彩膜基板2靠近阵列基板1的表面为下表面。当在彩膜基板2的上表面设置有外接引脚，外接引脚上绑定有触控柔性电路板24时，适用于On-Cell触控功能的触控显示面板，On-Cell触控功能组件嵌入到彩膜基板2和上偏光片22之间。当在彩膜基板2的下表面设置有外接引脚，外接引脚上绑定有触控柔性电路板24时，适用于In-Cell触控功能的触控显示面板，In-Cell触控功能组件嵌入到阵列基板1和彩膜基板1之间。
上述触控显示面板中，在阵列基板1超出彩膜基板2的边缘区域的对应位置切除彩膜基板2的部分，并将彩膜基板2超出阵列基板1的边缘区域保留，在彩膜基板2超出阵列基板1的边缘区域上设置外接引脚以及触控柔性电路24，实现On-Cell或In-Cell触控功能，提高了彩膜基板2的利用率。
上述触控显示面板在与第一边缘区域27所在侧相对的另一侧，阵列基板1包括超出彩膜基板2边缘的第二边缘区域18，在第二边缘区域18的邻近彩膜基板2的上表面上，设置有显示驱动芯片12。此处，以阵列基板1靠近彩膜基板2的表面为上表面，以阵列基板1远离彩膜基板2的表面为下表面。
为了保证第一边缘区域27的彩膜基板2的边缘到触控显示面板的有效显示区域之间为2-2.5mm的空间来焊接触控柔性电路板，故将第一边缘区域27超出阵列基板1边缘的长度设置为0.8mm～1.5mm，优选设置为1mm。如图2所示，在本发明的实施例中，通过设置在第一边缘区域27的彩膜基板2，有效利用了第二边缘区域18对应位置被切除的彩膜基板2的材料，不需要为了增加On-Cell触控功能而变更彩膜基板2的规格，提高了彩膜基板2的利用率。在第一边缘区域27的彩膜基板2的下表面(朝向阵列基板表面)没有任何图形，使得该第一边缘区域27的彩膜基板2具有透光性，这就无需变更现有产品的阵列基板1和彩膜基板2的设计就可以满足用于监控触控柔性电路板24的焊接状态的透光条件。
如图2和图3所示，阵列基板1包括：控制液晶偏转的像素阵列(未图示)，设置在阵列基板1上表面(即朝向彩膜基板2的表面)；第一各向异性导电胶11，设置在阵列基板1上；显示驱动芯片12，通过第一各向异性导电胶11焊接到阵列基板1的上表面；主柔性电路板14，通过第二各向异性导电胶13焊接到阵列基板1的上表面；下偏光片15设置在阵列基板1的下表面，并在第二边缘区域18处有缺失。
如图2和图4所示，彩膜基板2包括：控制颜色的彩膜像素阵列(未图示)，设置在彩膜基板2的下表面(即朝向阵列基板1的表面)；透明导 电层21，设置在彩膜基板2的上表面；触控膜层，通过掩膜工艺在透明导电层21上形成，具有On-Cell触控功能；外接引脚，用于焊接触控柔性电路板24，该外接引脚设置在第一边缘区域27的预定表面上，该预定表面为第一边缘区域27远离阵列基板1的上表面；关于彩膜基板2的上表面上设置有用于实现触控功能的触控膜层(未图示)，可理解的是，上述外接引脚设置在第一边缘区域27上，触控膜层设置在非第一边缘区域27，且触控膜层的触控走线与外接引脚电连接，外接引脚上绑定有触控柔性电路板24；上偏光片22，设置在透明导电层21上，也即设置在触控膜层上，并且在第一边缘区域27处缺失。
图5为图2所示的On-Cell触控显示面板的平面示意图。上述阵列基板和彩膜基板的平面图如图5所示，本实施例不对上述透明导电层21、触控膜层、外接引脚、主柔性电路板14和触控柔性电路板24的具体形状结构进行详细说明。图5仅用于举例，但是并不限定各膜层的结构。
液晶层3包括：液晶(未图示)；在液晶上下表面的PI取向层；以及设置在阵列基板1和彩膜基板2之间，用于粘合阵列基板1和彩膜基板2，并密封液晶层的封框胶31。
为了保证第一边缘区域27到有效显示区域有2-2.5mm的空间来贴合上偏光片22和焊接触控柔性电路板24，故第一边缘区域27的彩膜基板2超出阵列基板1边缘的长度设置为0.8mm～1.5mm，优选设置为1mm。此外，在于第一边缘区域27所在侧相对的另一侧的第二边缘区域18的阵列基板1超出彩膜基板2的边缘的长度设置为3mm以上，以保证有足够的空间来焊接显示驱动芯片12和主柔性电路板14。
本实施例通过设计第一边缘区域27来实现On-Cell触控功能，只需要在切割时通过设置切割机的参数来形成所需大小的第一边缘区域27，确定其中彩膜基板2的边缘超出阵列基板1边缘的长度，无需变更现有产品设计，和现有非On-Cell产品具有很好的兼容性。对于同一款产品，如果不需要具有On-Cell触控功能，则可以不进行On-Cell相关工艺制程并且在切割时不保留第一边缘区域27的彩膜基板2；如果需要具有On-Cell触控功 能，则可以进行On-Cell相关工艺制程并且在切割时保留第一边缘区域27的彩膜基板2。另外这种方式还可以和当前主流的G/F/F(Glass-Film-Film)触控解决方案很好的兼容。
下面对将上述实施例的方案用于In-Cell触控面板中进行详细说明。
In-Cell触控面板分为自容和互容方式，自容方式为横向电极(TX)和纵向电极(RX)分别同公共电极构成电容，互容方式为横向电极和纵向电极在相互交叉的地方形成电容，在检测互容的大小时，横向电极依次发射激励信号，纵向电极同时接收信号，得到整个触控面板二维平面的电容的值的分布，由此根据电容的变化计算出每一个触摸点的坐标。
图6为现有技术中In-Cell触控显示面板的结构示意图。为实现In-Cell互容方式的触控功能，如图6所示，现有技术需要在阵列基板1和彩膜基板2上分别设置用于发射激励信号的横向电极走线和用于接收激励信号的纵向电极走线，通过在阵列基板1和彩膜基板2之间单独设置一条各向异性导电性质的导电胶，把位于彩膜基板2上的纵向电极走线连接到阵列基板1上，并通过在阵列基板1上焊接的显示驱动芯片12或柔性电路板来实现纵向电极电容信号的驱动和检测。在本发明的实施例中，第四各向异性导电胶32设置在阵列基板1和彩膜基板2之间，用于导通阵列基板1上的RX连接线(未图示)和彩膜基板2上的RX走线(未图示)。彩膜阵列基板2上的RX走线经由第四各向异性导电胶32、RX连接线及第二各向异性导电胶13和主柔性电路板14实现电连接。但是采用上述方法通过设置各向异性导电胶把位于彩膜基板2上的纵向电极走线连接到阵列基板1来实现驱动的方式，会受到阵列基板1布线空间紧张、阵列基板1和彩膜基板2之间液晶盒厚波动、导电胶涂覆不均、导电胶中导电粒子大小及密度等诸多因素的影响，导致纵向电极走线驱动电阻较大以致不能正常导通。另一方面，为了在阵列基板1上焊接显示驱动芯片12或柔性电路板还需要设置阵列基板1超出彩膜基板2边缘的第二边缘区域18，需要将对应位置的彩膜基板2切除。因此，上述方案不但提高了触控显示面板制作工艺的复杂度，影响了产品的良率，还降低了彩膜基板2的利用率。
图7为根据本发明第二实施例的In-Cell触控显示面板的结构示意图。图8为图7所示的In-Cell触控显示面板中的阵列基板中横向电极的走线示意图。图9为图7所示的In-Cell触控显示面板中的彩膜基板中纵向电极的走线示意图。本实施例中通过设置在第一边缘区域27的彩膜基板2，有效利用了第二边缘区域18对应位置被切除的彩膜基板2的部分，不需要变更彩膜基板2的规格，提高了彩膜基板2的利用率，并且在第一边缘区域27的彩膜基板2的下表面(朝向阵列基板的表面)设置用于驱动纵向电极走线的触控柔性电路板24，该方案不会受到阵列基板1布线空间紧张、阵列基板1和彩膜基板2之间液晶盒厚波动、导电胶涂覆不均、导电胶中导电粒子大小及密度等诸多因素的影响，避免导致纵向电极走线驱动电阻较大以及不能正常导通的现象。从而本实施的方案在保证纵向电极RX走线25连接性的前提下，降低RX走线25电阻、提高RX走线25的驱动和检测能力，从而降低In-Cell互容触控显示面板的工艺复杂度、提高产品的良率，并且还提高彩膜基板2的利用率。
如图7所示，阵列基板1包括：控制液晶偏转的像素阵列(未图示)，设置在阵列基板1上表面(即朝向彩膜基板2的表面)；第一各向异性导电胶11，设置在阵列基板1上；显示驱动芯片12，通过第一各向异性导电胶11焊接到阵列基板1上，并和阵列基板1上的TX连接线17形成电连接；第二各向异性导电胶13，设置在阵列基板1上；主柔性电路板14，通过第二各向异性导电胶13焊接到阵列基板1上，并和阵列基板1上的相关连线形成电连接；TX走线16，设置在阵列基板1上；TX连接线17，设置在阵列基板1上。如图8所示，TX走线16和显示驱动芯片12经由第一各向异性导电胶11和TX连接线17实现电学连接。在具体结构中，在阵列基板1的下表面上还设置有下偏光片15(图7中未图示，具体可以参见图2)，并在第二边缘区域18处有缺失。
彩膜基板2包括：控制颜色的彩膜像素阵列(图7中未图示)，设置在彩膜基板2的下表面(即朝向阵列基板1的表面)；第三各向异性导电胶23，设置在彩膜基板2上；彩膜基板2靠近阵列基板1的下表面上设置有 包含RX走线25的第一触控电极膜层；触控柔性电路板24，通过第三各向异性导电胶23焊接到彩膜基板2上，以使彩膜基板2上的第一边缘区域27下表面上的外接引脚与第一触控电极膜层的电极走线电连接，即RX连接线26和RX走线25电连接。如图9所示，RX走线25，设置在彩膜基板2上；RX连接线26，设置在彩膜基板2上。RX走线25和触控柔性电路板24经由第三各向异性导电胶23和RX连接线26实现电连接。
液晶层3包括：液晶(未图示)；封框胶31，设置在阵列基板1和彩膜基板2之间，用于粘合阵列基板1和彩膜基板2，并实现液晶层的密封性。
在触控显示基板的上边缘，彩膜基板2的上边缘超出阵列基板1以形成第一边缘区域27，第一边缘区域27上涂覆第三各向异性导电胶23、焊接触控柔性电路板24、设置RX连接线26；在触控显示基板的下边缘，阵列基板1下边缘超出彩膜基板2以形成第二边缘区域18，在第二边缘区域18上设置TFT阵列的各种必要的信号线和图形(未图示)、涂覆第一各向异性导电胶11和第二各向异性导电胶13、焊接显示驱动芯片12和主柔性电路板14以及TX连接线17。例如在检测互容大小时，作为TX走线16的驱动电路，驱动显示驱动芯片12依次向TX走线16输入激励信号，与此同时，所有RX走线25同时接收信号，从而检测出所有TX走线16和RX走线25相交处的电容大小，根据电容的变化量计算出每一个触摸点的坐标，从而实现触控功能。
本实施例所提供的具有In-Cell触控功能的触控显示面板，直接把用于驱动RX走线25的触控柔性电路板24焊接在彩膜基板2上。因无需把RX走线25通过导电胶从彩膜基板2上连接到阵列基板1上，在兼容现有触控显示面板生产工艺的前提下，既能保证RX走线25连接性、降低RX走线25电阻、提高RX走线25的驱动和检测能力，又能够避免因In-Cell互容触控功能的引入导致触控显示面板的高工艺复杂度和低生产良率。另外，显示驱动芯片12与触控柔性电路板24分别设置在对盒后的阵列基板1和彩膜基板2的两端，不需要生产新规格的彩膜基板，也不用切除过多的彩 膜基板，提高了彩膜基板2的利用率。
图10为图7所示的In-Cell触控显示面板中横向电极和纵向电极走线示意图。上述阵列基板1和彩膜基板2的平面图如图10所示，阵列基板1的上表面上的第二触控电极膜层的TX走线16与彩膜基板2上的第一触控电极膜层的RX走线交叉设置。本实施例不对上述RX走线25、RX连接线26、TX走线16、TX连接线17、主柔性电路板14以及触控柔性电路板24的具体形状结构进行详细说明。图10仅用于举例，并不限定触控显示面板平面图中各走线的结构。
本发明的实施例还提供了一种显示装置，包括如上述的触控显示面板。
本发明的实施例中的显示装置可以为：手机、平板电脑、电视机、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本发明的说明书中，说明了大量具体细节。然而，能够理解，本发明的实施例可以在没有这些具体细节的情况下实践。在一些实例中，并未详细示出公知的方法、结构和技术，以便不模糊对本说明书的理解。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围，其均应涵盖在本发明的权利要求和说明书的范围当中。

Claims (10)

  1. 一种触控显示面板，包括：层叠的阵列基板和彩膜基板，所述彩膜基板包括超出所述阵列基板边缘的第一边缘区域，所述第一边缘区域的预定表面上包括外接引脚，所述外接引脚与触控控制电路连接。
  2. 根据权利要求1所述的触控显示面板，其中，在与所述第一边缘区域所在侧相对的另一侧，所述阵列基板包括超出所述彩膜基板边缘的第二边缘区域，在所述第二边缘区域的邻近所述彩膜基板的表面上，包括显示驱动芯片。
  3. 根据权利要求1所述的触控显示面板，其中，所述第一边缘区域超出所述阵列基板边缘的长度为0.8mm～1.5mm。
  4. 根据权利要求1-3中任一项所述的触控显示面板，其中，所述预定表面为所述第一边缘区域的远离所述阵列基板的表面；在所述彩膜基板的远离所述阵列基板的表面上包括触控膜层，其被配置为实现触控功能。
  5. 根据权利要求4所述的触控显示面板，其中，所述外接引脚与所述触控膜层的触控走线电连接。
  6. 根据权利要求4所述的触控显示面板，其中，在所述触控膜层上还设置有偏光片。
  7. 根据权利要求1-3中任一项所述的触控显示面板，其中，所述预定表面为所述第一边缘区域的靠近所述阵列基板的表面；所述彩膜基板的靠近所述阵列基板的表面上包括第一触控电极膜层。
  8. 根据权利要求7所述的触控显示面板，其中，所述外接引脚与所述第一触控电极膜层的电极走线电连接。
  9. 根据权利要求7所述的触控显示面板，其中，所述阵列基板上包括第二触控电极膜层；所述第一触控电极膜层的电极和所述第二触控电极膜层的电极交叉设置。
  10. 一种显示装置，包括如权利要求1-9中任一项所述的触控显示面板。
PCT/CN2016/077332 2015-05-22 2016-03-25 触控显示面板及显示装置 WO2016188216A1 (zh)

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