WO2021027711A1 - 触控屏、屏幕模组和电子设备 - Google Patents
触控屏、屏幕模组和电子设备 Download PDFInfo
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- WO2021027711A1 WO2021027711A1 PCT/CN2020/107740 CN2020107740W WO2021027711A1 WO 2021027711 A1 WO2021027711 A1 WO 2021027711A1 CN 2020107740 W CN2020107740 W CN 2020107740W WO 2021027711 A1 WO2021027711 A1 WO 2021027711A1
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- groove
- axis
- touch screen
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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
- G06F3/044—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
-
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- 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
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
-
- 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
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- 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
Definitions
- This application relates to the technical field of touch screens, and more specifically, to a touch screen, a screen module and an electronic device.
- touch screens are widely used.
- the touch screen includes a transparent conductive layer with a graphical design, which can achieve touch control effects and display effects.
- the area that can be flexibly bent in a foldable electronic device can be called a bending area.
- the film layer dislocation and internal stress exist in the bending area, and the transparent conductive layer located in the bending area is easily broken.
- the circuit of the transparent conductive layer is broken or the impedance increases, and finally the touch effect of the touch screen becomes poor or directly fails, which seriously reduces the reliability of the touch screen.
- This application provides a touch screen, a screen module, and an electronic device, which are designed to widen the ends of the trenches whose length on the y axis perpendicular to the bending axis is greater than 0 in the conductive layer of the touch screen ,
- the manufacturing process of the touch screen of the present application can be realized only by pre-designing the pattern of the mask plate, and the operation is simple , The implementation is quick and very practical.
- a touch screen in a first aspect, can be bent along a bending axis, the touch screen includes a conductive layer, the conductive layer includes a plurality of first grooves, the second A groove includes a main groove and a first widened groove, the first widened groove communicates with the first end of the main groove, and the component of the length of the main groove in the direction of the bending axis Greater than 0, the projected length of the first widening groove on the x-axis is greater than the projected length of the first end on the x-axis, the x-axis is perpendicular to the bending axis, and the x The plane where the axis and the bending axis are located is the plane where the surface of the touch screen is located.
- the projected length of the widening groove on the x-axis perpendicular to the bending axis can be greater than that of the The projected length of the end of the main groove connected to the widening groove on the x-axis, when the touch screen is pulled on the x-axis during the bending process, it can make the original focus on the smaller end of the main groove
- the stress is distributed to the widened groove of larger size, and the widened groove, which is the end of the first groove, receives less stress on a single point of stress, thereby effectively reducing the occurrence of stress at the end of the first groove.
- the phenomenon of stress concentration can reduce the fracture of the conductive layer and improve the reliability of the touch screen.
- the manufacturing process of the touch screen of the present application can be realized only by designing the pattern of the mask plate in advance, and the operation is simple, the implementation is quick, and it is very practical.
- the projected length of the first widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the first end on the x-axis.
- At least a part of the groove wall of the first widening groove is an arc-shaped groove wall.
- the arc-shaped inner wall is arranged in the widening groove, which can reduce the stress concentration phenomenon in a local area caused by the sudden change of the shape of the widening groove.
- the arc groove wall is formed based on a chamfer design.
- the widening groove includes a chamfer
- the arc-shaped groove wall is an outer wall of the chamfer.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the first end.
- the width direction of the first widening groove is perpendicular to the bending axis.
- the touch screen provided by the present application, by providing a widening groove extending in a direction perpendicular to the direction of the bending axis at the end of the main groove, the stress originally concentrated on the smaller end of the main groove can be reduced. Distributed to a larger extent on the widening grooves of larger size can better reduce the phenomenon of stress concentration at the end of the first groove, so as to better reduce the phenomenon of conductive layer fracture and improve the touch screen Reliability.
- the first groove further includes a second widening groove, the second widening groove communicates with the second end of the main groove, and the second widening groove is located on the x-axis
- the length of the upper projection is greater than the length of the second end projected on the x-axis.
- the projected length of the second widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the second end on the x-axis.
- At least a part of the groove wall of the second widening groove is an arc-shaped groove wall.
- the arc groove wall is formed based on a chamfer design.
- the widening groove includes a chamfer
- the arc-shaped groove wall is an outer wall of the chamfer.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the second end.
- the width direction of the second widening groove is perpendicular to the bending axis.
- the length direction of the main groove is parallel to the bending axis direction.
- the component of the length of the main groove in the x-axis direction is equal to zero.
- the conductive layer is a transparent conductive film layer.
- a touch screen in a second aspect, can be bent along a bending axis, the touch screen includes a conductive layer, the conductive layer includes a plurality of first grooves, the second A groove includes a first end, a second end, and a main body located between the first end and the second end, and the projected length of the first end on the x-axis is greater than that of the The projected length of the portion of the main body part that is in contact with the first end on the x-axis, and the projected length of the second end on the x-axis is greater than that of the main body and the second The length of the projected part of the end contact on the x axis, the x axis is perpendicular to the bending axis, and the plane where the x axis and the bending axis are located is the surface of the touch screen Plane.
- a screen module including a flexible display screen, a touch screen, and a cover plate stacked in sequence, wherein the touch screen includes a conductive layer, and the conductive layer includes a plurality of first grooves ,
- the first groove includes a main groove and a first widened groove, the first widened groove communicates with a first end of the main groove, and the length of the main groove is at the position where the bending shaft is The component in the direction is greater than 0, the projected length of the first widening groove on the x-axis is greater than the projected length of the first end on the x-axis, and the x-axis is perpendicular to the bending axis, And the plane where the x axis and the bending axis are located is the plane where the surface of the touch screen is located.
- the projected length of the first widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the first end on the x-axis.
- At least a part of the groove wall of the first widening groove is an arc-shaped groove wall.
- the arc groove wall is formed based on a chamfer design.
- the widening groove includes a chamfer
- the arc-shaped groove wall is an outer wall of the chamfer.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the first end.
- the width direction of the first widening groove is perpendicular to the bending axis.
- the first groove further includes a second widening groove, the second widening groove communicates with the second end of the main groove, and the second widening groove is located on the x-axis
- the length of the upper projection is greater than the length of the projection of the second end on the x-axis.
- the projected length of the second widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the second end on the x-axis.
- At least a part of the groove wall of the second widening groove is an arc-shaped groove wall.
- the arc groove wall is formed based on a chamfer design.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the second end.
- the width direction of the second widening groove is perpendicular to the bending axis.
- the length direction of the main groove is parallel to the bending axis direction.
- the component of the length of the main groove in the x-axis direction is equal to zero.
- the conductive layer is a transparent conductive film layer.
- a screen module including a flexible display screen, a touch screen, and a cover that are stacked in sequence, wherein the touch screen is bent along a bending axis, and the touch screen includes a conductive Layer, the conductive layer includes a plurality of first grooves, the first grooves include a first end, a second end, and a main body located between the first end and the second end , The projected length of the first end on the x-axis is greater than the projected length on the x-axis of the part of the main body that is in contact with the first end, and the second end is on the x-axis The length projected on the x-axis is greater than the length projected on the x-axis of the part of the main body that is in contact with the second end, the x-axis is perpendicular to the bending axis, and the x-axis and The plane where the bending axis is located is the plane where the surface of the touch screen is located.
- an electronic device including: a bending axis and a screen module, the screen module can be bent along the bending axis, and the screen module includes flexible display screens stacked in sequence , A touch screen and a cover plate, wherein the touch screen includes a conductive layer, the conductive layer includes a plurality of first grooves, the first grooves include a main groove and a first widened groove, the second A widening groove communicates with the first end of the main groove, the length of the main groove in the direction of the bending axis is greater than 0, the first widening groove is projected on the x-axis The length is greater than the projected length of the first end on the x axis, the x axis is perpendicular to the bending axis, and the plane where the x axis and the bending axis are located is the touch screen The plane where the surface lies.
- the projected length of the first widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the first end on the x-axis.
- At least a part of the groove wall of the first widening groove is an arc-shaped groove wall.
- the arc groove wall is formed based on a chamfer design.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the first end.
- the width direction of the first widening groove is perpendicular to the bending axis.
- the first groove further includes a second widening groove, the second widening groove communicates with the second end of the main groove, and the second widening groove is located on the x-axis
- the length of the upper projection is greater than the length of the second end projected on the x-axis.
- the projected length of the second widening groove on the x-axis is greater than or equal to 1.5 times the projected length of the second end on the x-axis.
- At least a part of the groove wall of the second widening groove is an arc-shaped groove wall.
- the arc groove wall is formed based on a chamfer design.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the second end.
- the width direction of the second widening groove is perpendicular to the bending axis.
- the length direction of the main groove is parallel to the bending axis direction.
- the component of the length of the main groove in the x-axis direction is equal to zero.
- the conductive layer is a transparent conductive film layer.
- an electronic device including: a bending axis and a screen module, the screen module can be bent along the bending axis, and the screen module includes flexible display screens stacked in sequence , A touch screen and a cover plate, wherein the touch screen includes a conductive layer, the conductive layer includes a plurality of first grooves, the first grooves include a first end, a second end, and The main body part between the first end and the second end, the length of the first end projected on the x-axis is greater than the part of the main body that contacts the first end in the The length of the projection on the x-axis, and the length of the second end on the x-axis is greater than the length of the portion of the main body that is in contact with the second end on the x-axis, so
- the x axis is perpendicular to the bending axis, and the plane where the x axis and the bending axis are located is the plane where the surface of the touch screen is located
- Fig. 1 is a schematic structural diagram of a possible electronic device provided by the present application.
- Fig. 2 is a schematic structural diagram of a possible screen module provided by the present application.
- FIG. 3 is a schematic structural diagram of a partial area of a transparent conductive layer in the prior art.
- FIG. 4 is a schematic structural diagram of the touch screen provided by the present application in a bent state.
- FIG. 5 is a schematic structural diagram of the touch screen provided by the present application.
- Fig. 6 is a schematic structural diagram of a partial area of a conductive layer provided by the present application.
- FIG. 7 is an exemplary structure diagram of the first groove provided by the present application.
- FIG. 8 is another exemplary structure diagram of the first groove provided by the present application.
- FIG. 9 is another exemplary structure diagram of the first groove provided by the present application.
- FIG. 10 is a schematic flowchart of a possible graphical design of a conductive layer provided by the present application.
- parallel or perpendicular described in this application can be understood as “approximately parallel” or “approximately perpendicular”.
- angle between two directions within a certain error range can mean approximately parallel or approximately perpendicular.
- not parallel or not perpendicular can be understood as “approximately not parallel” or “approximately not perpendicular”.
- first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
- the features defined with “first” and “second” may explicitly or implicitly include one or more of these features.
- At least one means one or more, and “plurality” means two or more. “At least part of an element” means part or all of an element.
- the present application can be applied to various electronic devices equipped with touch screens, especially foldable electronic devices.
- Part or all of the area of the foldable electronic device can be bent.
- the area where the part or all of the area can be bent is referred to as a bending area.
- the foldable electronic device can be folded or unfolded. When the foldable electronic device is folded, it will bend around a central axis, which can be defined as the bending axis.
- the direction parallel to the bending axis may be defined as the bending axis direction, and the electronic device can be bent around the bending axis direction.
- this application defines two mutually perpendicular x-axis, y-axis and z-axis, the y-axis is parallel to the bending axis, the x-axis is perpendicular to the bending axis and parallel to the plane where the surface of the electronic device is located, and the z-axis It is perpendicular to both the x-axis and the y-axis, and the thickness direction of the electronic device is parallel to the z-axis.
- Figure 1 shows a schematic structural diagram of an electronic device provided by this application.
- the electronic device 100 includes a screen module 10 and a bending axis 20.
- the area 101 is a bending area of the electronic device 100, and the electronic device 100 can be bent along the bending axis 20.
- FIG. 2 shows a schematic structural diagram of a screen module provided by this application, and the screen module can be applied to a foldable electronic device.
- the screen module 10 includes a flexible display screen 110, a touch screen 120 and a cover 130 which are bonded by glue 140 and are sequentially stacked.
- Touch screen also known as “touch screen” or “touch panel” is an inductive liquid crystal display device that can receive input signals such as contacts, and is used in electronic devices such as mobile phones, e-books, or digital cameras.
- Capacitive touch screens are widely used due to their advantages of long life, high light transmittance and high accuracy.
- the capacitive touch screen uses the current induction of the human body to work.
- the user touches the touch screen with a finger or a touch pen to cause the touch screen to generate electrical signal changes to realize the control of the electronic device.
- a capacitive touch screen is taken as an example to illustrate the application. It should be understood that this application can be applied not only to capacitive touch screens, but also to other touch screens such as resistive touch screens, and this application does not make any limitation.
- the touch screen includes a transparent conductive layer with a graphical design.
- the graphical design can form boundary spacing grooves and grooves in the transparent conductive layer, where each boundary spacing groove and each other boundary spacing groove and each groove Phase isolation, each trench is also isolated from each other trench.
- the boundary spacer groove can isolate two adjacent areas in the transparent conductive layer to form a circuit to achieve the effect of touch control.
- the two areas can both be electrode areas, or one of the two areas can be an electrode area and the other can be a non-electrode area. Area, or, both areas are non-electrode areas.
- the electrode area also known as the circuit area, refers to the area where the circuit for signal communication is located, or the area where the pattern used to embody the logic circuit is located.
- the non-electrode area is also called a dummy area.
- these patterns are not related to logic circuits, but are designed in consideration of light reflection and diffraction.
- the grooves are arranged in part or all of the areas of the transparent conductive layer except for the boundary interval grooves to achieve touch and display effects.
- Figure 3 shows a schematic structural diagram of a partial area of the transparent conductive layer.
- the transparent conductive layer includes electrode regions 1214 and non-electrode regions 1215 arranged at intervals. Specifically, as shown in FIG. 3, when the non-electrode area 1215 is located at the edge of a local area of the transparent conductive layer, the non-electrode area 1215 is located on the other side of the non-edge side and is adjacent to an electrode area 1214.
- each boundary spacing groove 1211 is located between the adjacent electrode area 1214 and the non-electrode area 1215 and is used to connect the adjacent electrode area 1214 and the non-electrode area 1215. Isolate.
- each of the boundary spacing grooves 1211 shown in FIG. 3 is used to isolate adjacent electrode regions 1214 and non-electrode regions 1215, which is only one embodiment of the present application.
- the boundary spacing groove 1211 can isolate any two adjacent areas in the transparent conductive layer to form a circuit to achieve the effect of touch control.
- the two areas can be electrode areas, or one can be an electrode area and the other It is a non-electrode area, or both areas may be non-electrode areas.
- a plurality of electrode regions 1214-A distributed along the y direction that are electrically connected by bridge electrodes form one of the capacitance sensing modules, and a plurality of electrode regions 1214-B connected to each other distributed along the x direction Another capacitance sensing module is formed, and there is a capacitance effect between the two capacitance sensing modules.
- the y-axis bending axis
- the groove can be divided into the first type groove and the second type groove according to the component of the groove length on the y-axis.
- the length of one type of groove has a y-axis component greater than 0, or the length of the first type of groove is not perpendicular to the y axis, optionally, the length of the first type of groove is parallel to the y axis, as shown in Figure 3
- the groove 1213 shown; the length of the second type of groove has a y-axis component equal to 0, such as the groove 1212 shown in FIG. 3.
- the length direction of the groove can be understood as the extending direction from one end to the other end of the groove.
- the groove can have any shape, for example, as shown in Figure 3. As shown, the length direction of the first type groove is parallel to the x-axis, and the shape is curved, and the length direction of the second type groove is parallel to the y-axis, and the shape is also curved.
- the length of the groove is greater than the width of the groove
- the length of the groove represents the dimension of the groove in its length direction
- the width of the groove represents the dimension of the groove in its width direction
- the length of the second type of groove in the y-axis component is equal to 0 can be understood as the second type of groove length in the y-axis component is approximately equal to 0, that is, the second type of groove If the length component of the y-axis is less than a range threshold, it can be considered that the length component of the second type of groove on the y-axis is equal to 0, as shown in the groove 1212 in FIG. 3.
- the length of the first type of groove on the y-axis component is greater than 0 can also be understood as the length of the first type of groove on the y-axis component is approximately greater than 0, that is, the length of the first type of groove on the y-axis If the component is greater than a range threshold, it can be considered that the length of the first type of groove has a y-axis component greater than zero.
- the following description of the relationship between the component of the main groove of the groove on a certain axis and 0 is the same as the explanation here, and will not be repeated in the following.
- FIG. 4 shows a schematic structural diagram of the touch screen of this application in a bent state.
- the area 122 is the bending area of the touch screen 120, and the dashed line indicates the bending axis.
- the film layer dislocation and internal stress exist in the bending area.
- the transparent conductive layer located in the bending area will receive a tensile force perpendicular to the bending axis, or it will receive a tensile force in the x direction, making it located in the bending area.
- the transparent conductive layer in the area is prone to breakage, causing the circuit of the transparent conductive layer to be broken or the impedance increases, and finally the touch effect of the touch screen becomes worse or directly fails, which seriously reduces the reliability of the touch screen.
- the current transparent conductive layer is generally made of transparent metal oxide materials, which makes the transparent conductive layer less flexible and more likely to cause the transparent conductive layer to break.
- the applicant has analyzed the fracture phenomenon of the transparent conductive layer and found that the transparent conductive layer located in the bending zone will cause the first type of grooves (such as the figure There is a phenomenon of stress concentration at the end of the trench 1213) shown in 3, which is an important factor leading to the fracture of the transparent conductive layer.
- this application provides a touch screen, which is designed to widen the ends of the first type trenches whose length on the y-axis in the transparent conductive layer is greater than 0, so as to reduce the ends of the trenches.
- the manufacturing process of the touch screen with this structure can be realized only by pre-designing the pattern of the mask plate. The operation is simple, the implementation is quick, and it is very practical.
- the first type of trench in the conductive layer is denoted as the first trench hereinafter.
- FIGS. 5 to 9 are only schematic illustrations, and should not constitute a limitation to the application.
- FIG. 5 shows a schematic structural diagram of the touch screen of this application.
- Fig. 6 is a schematic structural diagram of a partial area of the conductive layer of the present application.
- FIG. 7 is an exemplary structure diagram of the first groove of the present application. Due to the limitation of the graphic size, the boundary spacing grooves and grooves shown in Fig. 5 are drawn with a single line.
- the touch screen 200 includes a substrate 210 and a conductive layer 220 stacked in sequence, and the touch screen 200 can be bent along a bending axis.
- the conductive layer 220 includes at least one boundary spacing groove 221 and at least one first trench 222 that are patterned.
- the conductive layer 220 may also include a length component of the y-axis (bending axis) equal to 0.
- the trench 225 that is, the length direction of the trench 225 is perpendicular to the y-axis, and the boundary spacing trench 221 is provided between two adjacent regions in the conductive layer 220 to isolate the two regions, which are both electrodes Region 223, or, one of the two regions is the electrode region 223 and the other is the non-electrode region 224 (not shown in the figure), or, both of the two regions are non-electrode regions (not shown in the figure) ).
- the first groove 222 includes a main groove 222-A, one or two widened grooves (widened groove 222-B1 and/or widened groove 222-B2), the length of the main groove 222-A is curved
- the component in the direction of the bending axis (the direction of the bending axis, the y direction) is greater than 0, where the length of the main slot 222-A represents the size of the main slot 222-A in its length direction.
- the widening groove may be provided at one end or both ends of the main groove 222-A. Referring to (i) and (k) in FIG.
- widened groove 222-B1 there is only one widened groove (for example, widened groove 222-B1) in the first groove 222, and this widened groove is the same as the first end of the main groove 222-A Connected, the projected length of the widening groove on the x-axis is greater than the projected length of the first end of the main groove 222-A on the x-axis.
- the first groove 222 has two widened grooves (for example, widened groove 222-B1 and widened groove 222-B2), then the two widened grooves One of the widening grooves (for example, the widening groove 222-B1) communicates with the first end of the main groove 222-A, and the other widening groove (for example, the widening groove 222-B2) is connected to the main groove 222-
- the second end of A is connected, the projection length of one of the widening grooves on the x-axis is greater than the projection length of the first end of the main groove 222-A on the x-axis, and the other widening groove is on the x-axis
- the projected length is greater than the projected length of the second end of the main slot 222-A on the x-axis.
- the length of the main groove is greater than the width of the main groove
- the length of the main groove represents the size of the main groove in its length direction
- the width of the main groove represents the size of the main groove in its width direction.
- FIG. 6 only schematically shows the first trench provided in the non-electrode region. It can be clearly understood that the first trench of the present application may be provided in the conductive layer except for the boundary spacing trench. Any area other than that, the arbitrary area may be a part or all of the area in the conductive layer except for the boundary spacer groove, which is not limited in this application.
- the projected length of the widening groove on the x-axis perpendicular to the bending axis can be greater than that of the main groove communicating with the widening groove The projected length of the end on the x-axis.
- the widening groove which is the end of the first groove, receives less stress at a single stress point, thereby effectively reducing stress concentration at the end of the first groove, thereby reducing electrical conductivity
- the phenomenon of layer fracture improves the reliability of the touch screen.
- the manufacturing process of the touch screen of the present application can be realized only by designing the pattern of the mask plate in advance, and the operation is simple, the implementation is quick, and it is very practical.
- the pattern of the boundary isolation groove shown in FIG. 6 is only a schematic illustration, and should not constitute a limitation to the application, and any pattern of the boundary isolation groove used to form a circuit is within the protection scope of the application.
- a widening groove (denoted as the first widening groove 222-B1) in the first groove communicating with the first end of the main groove is taken as an example, and the first groove of the present application is made In detail, the first end of the main groove is either one of the two ends of the main groove.
- the length of the main groove 222-A has a component on the y-axis greater than 0, that is, the length direction of the main groove 222-A only needs to be not perpendicular to the y-axis.
- the length direction of the main groove 222-A is parallel to the y axis.
- the included angle between the length direction of the main groove 222-A and the y-axis is greater than 0° and less than 90°.
- the width of the main groove 222-A can be the same (as shown in any one of the drawings in Figures 7(a) to 7(i)) or different (such as As shown in any one of the drawings in Fig. 7(j) or 7(k)), the width of the main groove 222-A is gradual from one end to the other end, which is not limited in this application.
- the purpose is to increase the size of the end of the first groove 222 on the x-axis. Therefore, as long as the first widening groove
- the length of 222-B1 projected on the x-axis is longer than the length projected on the x-axis with the first end.
- the width direction of the first widening groove 222-A may be parallel to the x-axis (as shown in any one of (a) to (e), (i) to (k) in FIG. 7) .
- the stress originally concentrated on the smaller-sized end of the main groove can be dispersed to the larger-sized widened groove to a greater extent, and the stress generated at the end of the first groove can be better reduced. Concentration phenomenon to better reduce the phenomenon of conductive layer fracture and improve the reliability of the touch screen.
- the shape and structure of the first widening groove 222-B1 may be a linear structure as shown in (a) in FIG. 7, or may be (b) and (c) in FIG.
- the curvilinear structure shown in) and (d) may be an S-shaped structure, a curved structure, a snake-shaped structure, a round structure, a mushroom-shaped structure, a barbell-shaped structure, and the like.
- the projected length of the first widening groove 222-B1 on the x-axis is greater than or equal to 1.5 times the projected length of the first end of the main groove 222-A on the x-axis. In this way, the single-point stress at the end of the first groove can be better reduced, and the stress concentration phenomenon can be better reduced.
- the projected length of the first widening groove 222-B1 on the x-axis can also be greater than or equal to the length of the first end of the main groove 222-A projected on the x-axis.
- the width of the end of the main groove 222-A is the same as the width of the main groove 222-A.
- the width direction of the first widening groove 222-B1 and the width direction of the main groove 222-A are both parallel to the x-axis, the length of the first widening groove 222-B1 projected on the x-axis can be understood as the first The width of the groove 222-B1 is widened, and the projection of the first end of the main groove 222-A on the x-axis can be understood as the width of the main groove 222-A.
- the width of the main groove 222-A remains basically unchanged, the width of the end of the main groove 222-A is substantially the same as the width of the main groove 222-A, and the main groove 222-A and the first The width direction of the wide groove 222-B1 is parallel to the x-axis.
- L 2 20um
- L 1 40um.
- At least a part of the groove wall of the first widening groove 222-B1 is an arc-shaped groove wall, and the arc-shaped groove wall can be arranged at any position of the first widening groove 222-B1.
- the arc-shaped groove wall may be formed based on a chamfer design.
- the arc-shaped groove wall can be formed by chamfering the intersection of two adjacent groove walls.
- the first widening groove 222-B1 includes adjacent first groove walls 222-B11 and second groove walls 222-B12, and the arc-shaped groove walls 222-B13 connect the first groove walls 222- B11 and the second groove wall 222-B12, the radius of the arc-shaped groove wall 222-B13 can be denoted as R 1 .
- the shape of the first widening groove 222-B1 may be a pattern with a curved design. According to this pattern with a curved design, etch along the depth direction (z direction) of the first widening groove 222-B1 to form Including widened grooves with curved groove walls.
- the radius of curvature of the arc-shaped groove wall is greater than 0.5 times the width of the first end of the main groove 222-A communicating with the first widening groove 222-B1. Assuming that the radius of curvature of the arc-shaped groove wall is denoted as ⁇ , and the width of the end of the main groove 222-A is denoted as L 2 , then
- the pattern of the first widening groove 222-B1 is a pattern with a curved design, and the radius of curvature of the curve is ⁇ , according to the pattern of the first widening groove 222-B1 along the depth of the first widening groove 223-B It is etched in the direction (z direction) to form a widened groove including arc-shaped groove walls 222-B13, wherein the radius of curvature of the arc-shaped groove walls 222-B13 is ⁇ .
- the boundary spacing trench 221 and the first trench 222 may be formed by etching the conductive layer 220.
- the conductive layer 220 may be a transparent conductive layer, and the transparent conductive layer may be a film layer formed of a transparent conductive film.
- the material of the transparent conductive layer may be a conductive material that is not limited to any of the following: indium-tin oxide (ITO), tin tellurium oxide, indium zinc oxide (IZO), zinc oxide (ZnO) ), carbon nanotube (CNT), silver (Ag), nanowire, conductive polymer, graphene, alloy materials.
- ITO indium-tin oxide
- IZO indium zinc oxide
- ZnO zinc oxide
- CNT carbon nanotube
- silver Au
- nanowire conductive polymer
- graphene alloy materials.
- this application can be applied not only to touch screens with display functions such as mobile phones, but also to other touch screens that do not require display functions. Therefore, the material of the conductive layer may only have a conductive effect.
- the substrate is a glass substrate, and may also be polyethylene terephthalate (PET), or polyimide (PI), or a cured adhesive layer, etc., where There are no restrictions.
- PET polyethylene terephthalate
- PI polyimide
- the first groove is described above in the manner that the first groove includes the main groove and the widened groove.
- the first groove is described by using the end portion and the main body portion of the first groove.
- the touch screen 200 includes a substrate 210 and a conductive layer 220 stacked in sequence, and the touch screen 200 can be bent along a bending axis.
- the conductive layer 220 includes a plurality of first trenches 222, the first trenches 222 include a first end 222-B1, a second end 222-B2, and located at the first end 222-B1 and the second end
- the main body part 222-A between the parts 222-B2, the first end part 222-B1 is projected on the x-axis longer than the part of the main body part 222-A that is in contact with the first end part 222-B1 is projected on the x-axis
- the length of the second end 222-B2 projected on the x-axis is greater than the length of the main body 222-A that is in contact with the second end 222-B2 projected on the x-axis.
- the main body 222-A may correspond to the main groove 222-A above
- the end of the first groove 222 may correspond to the widened groove above
- the first end 222-B1 of the first groove 222 may correspond to In the above first widening groove 222-B1
- the part of the main body 222-A that is in contact with the first end 222-B1 may correspond to the first end of the above main groove 222-A
- the second end 222-B2 can correspond to the second widening groove 222-B2 above
- the part of the main body 222-A that contacts the second end 222-B2 can correspond to the main groove 222-A above The second end.
- each part of the first groove reference may be made to the relevant description above, which will not be repeated here.
- FIG. 10 is only a schematic illustration. The process of FIG. 10 can be divided into 6 steps, which are described in detail as follows.
- the first step (1) is to form a uniform transparent conductive film 220 on the substrate 210 by physical vapor deposition (PVD) or chemical vapor deposition (CVD) or other film forming techniques to form a conductive film.
- PVD physical vapor deposition
- CVD chemical vapor deposition
- a photoresist film 230 is formed on the transparent conductive film 220 by coating technology
- the third step (3) enter the exposure machine, according to the designed mask 240, the photoresist film 230 is exposed by light of a certain wavelength and power, wherein the pattern of the mask 240 includes the above The boundary spacing groove and the first groove having a widened groove;
- the photoresist film 230 is exposed to light, it is developed in a special development process to remove part of the photoresist glue to realize the patterning of the photoresist film.
- the transparent conductive film 220 is etched through an etching process, so that the pattern of the photoresist film is transferred to the transparent conductive film 220.
- the photoresist film 230 on the transparent conductive film 220 is removed to realize the patterned production of the transparent conductive film 220, and a transparent conductive film including the boundary interval groove and the first trench is generated.
- the screen module 10 includes a flexible display screen 110, a touch screen 120, and a cover 130 stacked in sequence.
- the touch screen 120 includes a substrate and a conductive layer.
- the present application also provides an electronic device.
- the electronic device 100 includes a bending shaft 20 and a screen module 10.
- the screen module 10 can be bent around the bending shaft 20 to realize the Folding or unfolding of electronic equipment.
- the screen module 10 includes a flexible display screen 110, a touch screen 120, and a cover 130 that are sequentially stacked.
- the touch screen 120 please refer to the above detailed description of the touch screen 200, which will not Repeat.
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Abstract
一种触控屏(120,200)、屏幕模组(10)和电子设备(100),通过对触控屏(120,200)的导电层(220)中长度在y轴上的分量大于0的沟槽(222)的端部做加宽设计,可以减少沟槽(222)的端部的应力集中现象,以提高电容式触控屏(120,220)的可靠性;此外,触控屏(120,220)的制作过程可以只需要预先设计好掩膜板(240)的图案就可实现,操作简单,实施快捷,非常实用。
Description
本申请要求于2019年8月9日提交中国专利局、申请号为201910734938.9、申请名称为“触控屏、屏幕模组和电子设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及触控屏技术领域,更具体地,涉及一种触控屏、屏幕模组和电子设备。
在个人数字助理、笔记本电脑及医疗装置等电子装置中,触控屏被广泛应用,触控屏包括具有图形化设计的透明导电层,可以实现触摸控制效果和显示效果。
目前,柔性显示技术得到快速发展,折叠场景中的触控方案十分关键。可折叠的电子设备中可以柔性弯折的区域可以称为弯折区,该电子设备在弯折时,弯折区存在膜层错动和内应力,位于弯折区域的透明导电层容易断裂,导致透明导电层的线路发生断路或阻抗增大,最终触控屏的触控效果变差或者直接失效,严重降低了触控屏的可靠性。
发明内容
本申请提供一种触控屏、屏幕模组和电子设备,通过对触控屏的导电层中长度在垂直于弯折轴的y轴上的分量大于0的沟槽的端部做加宽设计,以减少沟槽的端部的应力集中现象,以提高触控屏的可靠性;此外,本申请的触控屏的制作过程可以只需要预先设计好掩膜板的图案就可实现,操作简单,实施快捷,非常实用。
第一方面,提供了一种触控屏,所述触控屏能够沿弯折轴被折弯,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括主槽以及第一加宽槽,所述第一加宽槽与所述主槽的第一端部相连通,所述主槽的长度在所述弯折轴所在方向上的分量大于0,所述第一加宽槽在x轴上投影的长度大于所述第一端部在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴与所述弯折轴所在的平面为所述触控屏的表面所在的平面。
因此,本申请提供的触控屏,通过在主槽的端部设置可以与主槽相连通的加宽槽,可以使得加宽槽在垂直于弯折轴的x轴上投影的长度大于与该加宽槽相连通的主槽的端部在x轴上投影的长度,触控屏在弯折过程中受到在x轴的拉力时,可以使得原本集中在主槽的较小尺寸的端部的应力被分散至较大尺寸的加宽槽上,作为第一沟槽的端部的加宽槽在单个受力点上受到的应力减少,从而,可以有效减少在第一沟槽的端部产生应力集中的现象,以减少导电层断裂的现象,提高触控屏的可靠性。此外,本申请的触控屏的制作过程可以只需要预先设计好掩膜板的图案就可实现,操作简单,实施快捷,非常实用。
可选地,所述第一加宽槽在所述x轴上投影的长度大于或等于所述第一端部在所述x 轴上投影的长度的1.5倍。
可选地,所述第一加宽槽的槽壁的至少一部分为弧形槽壁。
因此,本申请提供的触控屏,这通过在加宽槽中设置弧形内壁,可以减少由于加宽槽的形状突变导致的局部范围内的应力集中现象。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述加宽槽包括倒角,所述弧形槽壁为所述倒角的外壁。
可选地,所述弧形槽壁的曲率半径大于所述第一端部的宽度的0.5倍。
可选地,所述第一加宽槽的宽度方向垂直于所述弯折轴。
因此,本申请提供的触控屏,通过在主槽的端部设置沿垂直于弯折轴方向的方向延伸的加宽槽,可以使得原本集中在主槽的较小尺寸的端部的应力能够被较大程度地分散到较大尺寸的加宽槽上,可以更好地减少在第一沟槽的端部产生应力集中的现象,以更好地减少导电层断裂的现象,提高触控屏的可靠性。
可选地,所述第一沟槽还包括第二加宽槽,所述第二加宽槽与所述主槽的第二端部相连通,所述第二加宽槽在所述x轴上投影的长度大于所述第二端部在所述x轴上投影的长度。
可选地,所述第二加宽槽在所述x轴上投影的长度大于或等于所述第二端部在所述x轴上投影的长度的1.5倍。
可选地,所述第二加宽槽的槽壁的至少一部分为弧形槽壁。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述加宽槽包括倒角,所述弧形槽壁为所述倒角的外壁。
可选地,所述弧形槽壁的曲率半径大于所述第二端部的宽度的0.5倍。
可选地,所述第二加宽槽的宽度方向垂直于所述弯折轴。
可选地,所述主槽的长度方向平行于所述弯折轴方向。
可选地,所述主槽的长度在x轴所在方向上的分量等于0。
可选地,所述导电层是透明导电膜层。
第二方面,提供了一种触控屏,所述触控屏能够沿弯折轴被折弯,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括第一端部、第二端部以及位于所述第一端部和所述第二端部之间的主体部,所述第一端部在x轴上投影的长度大于所述主体部中与所述第一端部接触的部分在所述x轴上投影的长度,且所述第二端部在所述x轴上投影的长度大于所述主体部中与所述第二端部接触的部分在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴和所述弯折轴所在的平面为所述触控屏的表面所在的平面。
第三方面,提供了一种屏幕模组,包括依次层叠设置的柔性显示屏、触控屏和盖板,其中,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括主槽以及第一加宽槽,所述第一加宽槽与所述主槽的第一端部相连通,所述主槽的长度在所述弯折轴所在方向上的分量大于0,所述第一加宽槽在x轴上投影的长度大于所述第一端部在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴与所述弯折轴所在的平面为所述触控屏的表面所在的平面。
可选地,所述第一加宽槽在所述x轴上投影的长度大于或等于所述第一端部在所述x 轴上投影的长度的1.5倍。
可选地,所述第一加宽槽的槽壁的至少一部分为弧形槽壁。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述加宽槽包括倒角,所述弧形槽壁为所述倒角的外壁。
可选地,所述弧形槽壁的曲率半径大于所述第一端部的宽度的0.5倍。
可选地,所述第一加宽槽的宽度方向垂直于所述弯折轴。
可选地,所述第一沟槽还包括第二加宽槽,所述第二加宽槽与所述主槽的第二端部相连通,所述第二加宽槽在所述x轴上投影的长度大于所述第二端部在所述x轴上的投影的长度。
可选地,所述第二加宽槽在所述x轴上投影的长度大于或等于所述第二端部在所述x轴上投影的长度的1.5倍。
可选地,所述第二加宽槽的槽壁的至少一部分为弧形槽壁。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述弧形槽壁的曲率半径大于所述第二端部的宽度的0.5倍。
可选地,所述第二加宽槽的宽度方向垂直于所述弯折轴。
可选地,所述主槽的长度方向平行于所述弯折轴方向。
可选地,所述主槽的长度在x轴所在方向上的分量等于0。
可选地,所述导电层是透明导电膜层。
第四方面,提供了一种屏幕模组,包括依次层叠设置的柔性显示屏、触控屏和盖板,其中,所述触控屏沿弯折轴被折弯,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括第一端部、第二端部以及位于所述第一端部和所述第二端部之间的主体部,所述第一端部在x轴上投影的长度大于所述主体部中与所述第一端部接触的部分在所述x轴上投影的长度,且所述第二端部在所述x轴上投影的长度大于所述主体部中与所述第二端部接触的部分在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴和所述弯折轴所在的平面为所述触控屏的表面所在的平面。
第五方面,提供了一种电子设备,包括:弯折轴和屏幕模组,所述屏幕模组能够沿所述弯折轴进行弯折,所述屏幕模组包括依次层叠设置的柔性显示屏、触控屏和盖板,其中,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括主槽以及第一加宽槽,所述第一加宽槽与所述主槽的第一端部相连通,所述主槽的长度在所述弯折轴所在方向上的分量大于0,所述第一加宽槽在x轴上投影的长度大于所述第一端部在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴与所述弯折轴所在的平面为所述触控屏的表面所在的平面。
可选地,所述第一加宽槽在所述x轴上投影的长度大于或等于所述第一端部在所述x轴上投影的长度的1.5倍。
可选地,所述第一加宽槽的槽壁的至少一部分为弧形槽壁。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述弧形槽壁的曲率半径大于所述第一端部的宽度的0.5倍。
可选地,所述第一加宽槽的宽度方向垂直于所述弯折轴。
可选地,所述第一沟槽还包括第二加宽槽,所述第二加宽槽与所述主槽的第二端部相 连通,所述第二加宽槽在所述x轴上投影的长度大于所述第二端部在所述x轴上投影的长度。
可选地,所述第二加宽槽在所述x轴上投影的长度大于或等于所述第二端部在所述x轴上投影的长度的1.5倍。
可选地,所述第二加宽槽的槽壁的至少一部分为弧形槽壁。
可选地,所述弧形槽壁基于倒角设计形成。
可选地,所述弧形槽壁的曲率半径大于所述第二端部的宽度的0.5倍。
可选地,所述第二加宽槽的宽度方向垂直于所述弯折轴。
可选地,所述主槽的长度方向平行于所述弯折轴方向。
可选地,所述主槽的长度在x轴所在方向上的分量等于0。
可选地,所述导电层是透明导电膜层。
第六方面,提供了一种电子设备,包括:弯折轴和屏幕模组,所述屏幕模组能够沿所述弯折轴进行弯折,所述屏幕模组包括依次层叠设置的柔性显示屏、触控屏和盖板,其中,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括第一端部、第二端部以及位于所述第一端部和所述第二端部之间的主体部,所述第一端部在x轴上投影的长度大于所述主体部中与所述第一端部接触的部分在所述x轴上投影的长度,且所述第二端部在所述x轴上投影的长度大于所述主体部中与所述第二端部接触的部分在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴和所述弯折轴所在的平面为所述触控屏的表面所在的平面。
图1是本申请提供的一种可能的电子设备的示意性结构图。
图2是本申请提供的一种可能的屏幕模组的示意性结构图。
图3是现有技术的透明导电层的局部区域的示意性结构图。
图4是本申请提供的触控屏在弯折状态的示意性结构图。
图5是本申请提供的触控屏的示意性结构图。
图6是本申请提供的导电层的局部区域的示意性结构图。
图7是本申请提供的第一沟槽的示例性结构图。
图8是本申请提供的第一沟槽的另一示例性结构图。
图9是本申请提供的第一沟槽的再一示例性结构图。
图10本申请提供的一种可能的导电层的图形化设计的示意性流程图。
下面将结合附图,对本申请中的技术方案进行描述。
首先,对本申请的相关术语做一说明。
本申请描述的“平行”或“垂直”,可以理解为“近似平行”或“近似垂直”,例如,两个方向之间的夹角在一定误差范围内都可以表示近似平行或近似垂直。对应地,“不平行”或“不垂直”,可以理解为“近似不平行”或“近似不垂直”。
术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者 隐含指明所指示的技术特征的数量。限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。
“至少一个”是指一个或者多个,“多个”是指两个或两个以上。“元件的至少部分”是指元件的部分或全部。
以下,对本申请的实施例进行介绍。
本申请可以应用于各种配置有触控屏的电子设备中,尤其是可以应用于可折叠的电子设备中。可折叠的电子设备的部分或全部区域可以实现弯折,在本申请中,将该部分或全部可以被折弯的区域称为弯折区。可选地,该可折叠的电子设备可以被折叠或展开。可折叠的电子设备实现折叠时,会绕着一个中心轴来做弯折,可以将这条中心轴定义为弯折轴,。此外,可以将平行于该弯折轴的方向定义为弯折轴方向,该电子设备能够绕该弯折轴方向弯折。
为了便于描述,本申请定义了两两互相垂直的x轴、y轴和z轴,y轴平行于弯折轴,x轴垂直于弯折轴且平行于电子设备的表面所在的平面,z轴与x轴和y轴都垂直,电子设备的厚度方向平行于z轴。
图1所示为本申请提供的一种电子设备的示意性结构图。参考图1,电子设备100包括屏幕模组10和弯折轴20,区域101是电子设备100的弯折区,电子设备100可以沿弯折轴20进行弯折。
图2所示为本申请提供的一种屏幕模组的示意性结构图,该屏幕模组可以应用于可折叠的电子设备中。参考图2,屏幕模组10包括依次层叠的采用胶140粘结的柔性显示屏110、触控屏120和盖板130。
触控屏又称为“触摸屏”或“触控面板”,是一种可接收触头等输入讯号的感应式液晶显示装置,用于手机、电子书或数码相机等电子设备上。电容式触控屏由于其寿命长、透光率高及准确性高等的优势,被广泛应用。电容式触控屏利用人体的电流感应进行工作,用户通过手指或触摸笔等触摸触控屏而引起触控屏产生电信号变化,以实现对电子设备的操控。以下,以电容式触控屏为例,对本申请做说明。应理解,本申请不仅可以应用于电容式触控屏中,也可以应用于其他例如电阻式触控屏等的触控屏,本申请不做任何限定。
触控屏包括具有图形化设计的透明导电层,图形化设计可以在透明导电层中形成边界间隔槽和沟槽,其中,每一边界间隔槽和其他每一边界间隔槽以及和每一沟槽相隔离,每一沟槽也和其他每一沟槽相隔离。边界间隔槽可以隔离透明导电层中相邻的两个区以形成电路来实现触摸控制的效果,该两个区可以都是电极区,或,该两个区可以一个是电极区另一个是非电极区,或,该两个区都是非电极区。电极区,又称为线路区,是指用于通信号的线路所在的区域,或是指用于体现逻辑电路的图形所在的区域。非电极区域,又称为虚假(dummy)区域,虽然也有图形(或花纹),但是这些图形(或花纹)与逻辑电路无关,而是考虑到光的反射与衍射所以设计的。沟槽设置在透明导电层中除边界间隔槽以外的部分或全部区域中,以实现触控效果和显示效果。
图3所示为透明导电层的局部区域的示意性结构图,为了避免歧义,需要说明的是,由于图形尺寸的限制,图3所示的边界间隔槽1211和沟槽(1212或1213)都以单线条绘制。参考图3,透明导电层包括间隔排布的电极区1214和非电极区1215。具体的,如图3所示,在非电极区1215位于透明导电层的局部区域的边缘时,该非电极区1215位于非 边缘侧的另一侧与一个电极区1214相邻,在非电极区1215位于透明导电层的局部区域的内侧时,该非电极区1215位于两个电极区1214之间且分别与这两个电极区相邻。应当知道的是,在图3对应的实施例中,每一边界间隔槽1211位于相邻的电极区1214和非电极区1215之间且用于将该相邻的电极区1214和非电极区1215隔离开。
需要说明的是,图3所示的每一边界间隔槽1211用于隔离相邻的电极区1214和非电极区1215,仅仅是本申请的其中一个实施例。在本申请中,边界间隔槽1211可以隔离透明导电层中任意相邻的两个区以形成电路来实现触摸控制的效果,该两个区可以都是电极区,也可以一个是电极区另一个是非电极区,也可以两个区都是非电极区。
继续参考图3,沿着y方向分布的采用桥电极的方式电连接的多个电极区1214-A形成其中一个电容感测模块,沿着x方向分布的多个彼此连接的电极区1214-B形成另一个电容感测模块,该两个电容感测模块之间存在电容效应。目前主流的设计中,以y轴(弯折轴)作为参考方向,可以根据沟槽的长度在y轴的分量,将沟槽分为第一类沟槽和第二类沟槽,其中,第一类沟槽的长度在y轴的分量大于0,或者,第一类沟槽的长度方向不垂直于y轴,可选地,第一类沟槽的长度方向平行于y轴,例如图3所示的沟槽1213;第二类沟槽的长度在y轴的分量等于0,例如图3所示的沟槽1212。
需要说明的是,无论沟槽的图形如何设计,沟槽的长度方向可以理解为沟槽的一端至另一端的延伸方向,在该延伸方向上,沟槽可以是任意形状,例如,如图3所示,第一类沟槽的长度方向平行于x轴,形状呈弯曲状,第二类沟槽的长度方向平行于y轴,形状也呈弯曲状。
应理解,沟槽的长度大于沟槽的宽度,沟槽的长度表示的是沟槽在其长度方向的尺寸,沟槽的宽度表示的是沟槽在其宽度方向的尺寸。
还应理解,由于加工误差等原因,第二类沟槽的长度在y轴的分量等于0可以理解为第二类沟槽的长度在y轴的分量近似等于0,即,第二类沟槽的长度在y轴的分量小于一个范围阈值就可以认为第二类沟槽的长度在y轴的分量等于0,如图3所示的沟槽1212。同理,第一类沟槽的长度在y轴的分量大于0也可以理解为第一类沟槽的长度在y轴的分量近似大于0,即,第一类沟槽的长度在y轴的分量大于一个范围阈值就可以认为第一类沟槽的长度在y轴的分量大于0。下文中针对沟槽的主槽在某个轴上的分量与0之间的关系的描述同此处的解释,后续不再赘述。
在可折叠的电子设备中,触控屏可以沿弯折轴弯折以实现该触控屏被折叠或被展开。图4所示为本申请的触控屏在弯折状态的示意性结构图。参考图4,区域122是触控屏120的弯折区,虚线表示弯折轴。
电子设备在弯折时,弯折区存在膜层错动和内应力,位于弯折区的透明导电层会受到垂直于弯折轴方向的拉力,或会受到x方向的拉力,使得位于弯折区的透明导电层易发生断裂,导致透明导电层的线路发生断路或阻抗增大,最终触控屏的触控效果变差或者直接失效,严重降低了触控屏的可靠性。此外,目前的透明导电层一般使用透明金属氧化物材料制作,使得透明导电层的柔韧性较差,更容易导致透明导电层的断裂。
在本申请中,申请人通过对透明导电层的断裂现象做分析后发现,位于弯折区的透明导电层在受到垂直于弯折轴方向的拉力时,会使第一类沟槽(例如图3所示的沟槽1213)的端部存在应力集中的现象,这是导致透明导电层的断裂的一个重要因素。
基于上述分析,本申请提供了一种触控屏,通过对透明导电层中长度在y轴上的分量大于0的第一类沟槽的端部做加宽设计,以减少沟槽的端部的应力集中现象,以提高触控屏的可靠性;此外,这种结构的触控屏的制作过程可以只需要预先设计好掩膜板的图案就可实现,操作简单,实施快捷,非常实用。
此外,为了便于描述,下文中将导电层中的第一类沟槽记为第一沟槽。
以下,结合图5至图9,对本申请的触控屏做详细说明。应理解,图5至图9的结构仅为示意性说明,不应对本申请构成限定。
图5所示为本申请的触控屏的示意性结构图。图6是本申请的导电层的局部区域的示意性结构图。图7是本申请的第一沟槽的示例性结构图。由于图形尺寸的限制,图5所示的边界间隔槽和沟槽都以单线条绘制。
参考图5,触控屏200包括依次层叠设置的基板210和导电层220,触控屏200能够沿弯折轴被折弯。参考图6,导电层220包括图形化形成的至少一个边界间隔槽221和至少一个第一沟槽222,可选地,导电层220还可以包括长度在y轴(弯折轴)的分量等于0的沟槽225,即,沟槽225的长度方向垂直于y轴,边界间隔槽221设置在导电层220中相邻的两个区之间以隔离该两个区,该两个区都是电极区223,或,该两个区中的一个区是电极区223另一个区是非电极区224(图中未示出),或,该两个区中的都是非电极区(图中未示出)。
参考图7,第一沟槽222包括主槽222-A、一个或两个加宽槽(加宽槽222-B1和/或加宽槽222-B2),主槽222-A的长度在弯折轴所在方向(弯折轴方向,y方向)上的分量大于0,其中,主槽222-A的长度表示主槽222-A在其长度方向的尺寸。加宽槽可以设置在主槽222-A的一个端部或两个端部。参考图7中的(i)和(k),第一沟槽222中只有一个加宽槽(例如,加宽槽222-B1),这个加宽槽与主槽222-A的第一端部连通,该加宽槽在x轴上投影的长度大于主槽222-A的第一端部在x轴投影的长度。参考图7中的(a)至(h),第一沟槽222有两个加宽槽(例如,加宽槽222-B1和加宽槽222-B2),则这两个加宽槽中的其中一个加宽槽(例如,加宽槽222-B1)与主槽222-A的第一端部相连通,另一个加宽槽(例如,加宽槽222-B2)与主槽222-A的第二端部相连通,该其中一个加宽槽在x轴上投影的长度大于主槽222-A的第一端部在x轴投影的长度,该另一个加宽槽在x轴上投影的长度大于主槽222-A的第二端部在x轴投影的长度。
应理解,主槽的长度大于主槽的宽度,主槽的长度表示的是主槽在其长度方向的尺寸,主槽的宽度表示的是主槽在其宽度方向的尺寸。
需要说明的是,图6中仅是示意性示出了在非电极区中设置的第一沟槽,可以明确理解的是,本申请的第一沟槽可以设置在导电层中除边界间隔槽以外的任意区域,该任意区域可以导电层中除边界间隔槽以外是部分或全部区域,本申请不做任何限定。
这样,通过在主槽的端部设置可以与主槽相连通的加宽槽,可以使得加宽槽在垂直于弯折轴的x轴上投影的长度大于与该加宽槽相连通的主槽的端部在x轴上投影的长度,触控屏在弯折过程中受到在x轴的拉力时,可以使得原本集中在主槽的较小尺寸的端部的应力被分散至较大尺寸的加宽槽上,作为第一沟槽的端部的加宽槽在单个受力点上受到的应力减少,从而,可以有效减少在第一沟槽的端部产生应力集中的现象,以减少导电层断裂的现象,提高触控屏的可靠性。此外,本申请的触控屏的制作过程可以只需要预先设计好掩膜板的图案就可实现,操作简单,实施快捷,非常实用。
关于边界间隔槽221、电极区223和非电极区224的描述可以参考上文针对这三个术语的描述,此处不再赘述。
需要说明的是,图6所示的边界隔离槽的图形仅为示意性说明,不应对本申请构成限定,任何用于形成电路的边界隔离槽的图形都在本申请的保护范围内。
以下,为了便于描述,以第一沟槽中与主槽的第一端部相连通的一个加宽槽(记为第一加宽槽222-B1)为例,对本申请的第一沟槽做详细说明,其中,主槽的第一端部是主槽的两个端部中的任一个端部。
主槽222-A的长度在y轴上的分量的大于0,也就是说,主槽222-A的长度方向只要不垂直于y轴即可。
可选地,参考图7中的(a)至(f)、(i)至(k),主槽222-A的长度方向平行于y轴。可选地,参考图7中的(g)和(h),主槽222-A的长度方向与y轴的夹角大于0°且小于90°。
沿主槽222-A的长度方向,主槽222-A的宽度可以是相同的(如图7(a)至7(i)中的任意一个附图所示),也可以是不同的(如图7(j)或7(k)中的任意一个附图所示),主槽222-A的宽度从一端至另一端是渐变的,本申请也不做任何限定。
作为在主槽222-A的第一端部设置的第一加宽槽222-B1,目的在于增加第一沟槽222的端部的在x轴上的尺寸,因此,只要第一加宽槽222-B1在x轴上投影的长度大于与第一端部在x轴上投影的长度即可。
可选地,第一加宽槽222-A的宽度方向可以平行于x轴(如图7中的(a)至(e)、(i)至(k)中的任意一个附图所示)。
这样,可以使得原本集中在主槽的较小尺寸的端部的应力能够被较大程度地分散到较大尺寸的加宽槽上,可以更好地减少在第一沟槽的端部产生应力集中的现象,以更好地减少导电层断裂的现象,提高触控屏的可靠性。
本申请对加宽槽的结构不做任何限定,任意在x轴投影的长度大于主槽的端部在x轴投影的长度的加宽槽的结构都在本申请的保护范围内。
可选地,参考图7,第一加宽槽222-B1的形状结构可以是如图7中的(a)所示的线型结构,也可以是如图7中的(b)、(c)和(d)所示的曲线型结构,例如,曲线型结构可以是S型结构、弧线型结构、蛇型结构、圆型结构、蘑菇型结构、杠铃型等。
可选地,第一加宽槽222-B1在x轴上投影的长度大于或等于主槽222-A的第一端部在x轴上投影的长度的1.5倍。这样,可以更好地减少第一沟槽的端部的单点应力,更好地减少应力集中现象。
应理解,上述1.5倍仅为示意性说明,第一加宽槽222-B1在x轴上投影的长度也可以大于或等于主槽222-A的第一端部在x轴上投影的长度的任意大于1的倍数,原则上,在可设计范围内,第一加宽槽222-B1在x轴上投影的长度的尺寸越大越好,例如,该大于1的倍数可以是1.2倍、1.3倍、1.6倍、2倍等。
可以理解的是,在主槽222-A的宽度基本不变的情况下,主槽222-A的端部的宽度与主槽222-A的宽度是相同的。在第一加宽槽222-B1的宽度方向与主槽222-A的宽度方向都平行于x轴的情况下,第一加宽槽222-B1在x轴上投影的长度可以理解为第一加宽槽222-B1的宽度,主槽222-A的第一端部在x轴上投影可以理解为主槽222-A的宽度。
示例性地,参考图8,主槽222-A的宽度基本保持不变,主槽222-A的端部的宽度与主槽222-A的宽度基本相同,主槽222-A与第一加宽槽222-B1的宽度方向平行于x轴,假设,主槽222-A的端部的宽度采用L
2表示,第一加宽槽222-B1的宽度采用L
1表示,则,L
1≥1.5L
2。例如,L
2=20um,L
1=40um。
可选地,第一加宽槽222-B1的槽壁的至少一部分为弧形槽壁,该弧形槽壁可以设置在第一加宽槽222-B1的任意位置。
这样,通过在加宽槽中设置弧形槽壁,可以减少由于加宽槽的形状突变导致的局部范围内的应力集中现象。
可选地,该弧形槽壁可以是基于倒角设计形成。该弧形槽壁可以是对两个相邻槽壁的交汇处做倒角设计形成的。示例性地,参考图8,第一加宽槽222-B1包括相邻的第一槽壁222-B11和第二槽壁222-B12,弧形槽壁222-B13连接第一槽壁222-B11和第二槽壁222-B12,弧形槽壁222-B13的半径可以记为R
1。
示例性地,第一加宽槽222-B1的形状可以是具有曲线设计的图形,按照这种具有曲线设计的图形沿第一加宽槽222-B1的深度方向(z方向)蚀刻,可以形成包括弧形槽壁的加宽槽。可选地,该弧形槽壁的曲率半径大于与第一加宽槽222-B1相连通的主槽222-A的第一端部的宽度的0.5倍。假设,弧形槽壁的曲率半径记为ρ,主槽222-A的端部的宽度记为L
2,则应满足
参考图9,第一加宽槽222-B1的图形是具有曲线设计的图形,曲线的曲率半径为ρ,按照第一加宽槽222-B1的图形沿第一加宽槽223-B的深度方向(z方向)蚀刻,形成包括弧形槽壁222-B13的加宽槽,其中,弧形槽壁222-B13的曲率半径为ρ。
可选地,边界间隔槽221和第一沟槽222可以是通过对导电层220做蚀刻形成的。
可选地,导电层220可以是透明导电层,透明导电层可以是透明导电薄膜形成的膜层。
示例性地,透明导电层的材料可以是不局限于以下任一种的导电材料:氧化铟锡(indium-tin oxide,ITO)、氧化碲锡、铟锌氧化物(IZO)、氧化锌(ZnO)、碳纳米管(carbon nanotube,CNT)、银(Ag)、纳米线、导电聚合物、石墨烯、合金材料。
需要说明的是,本申请不仅可以应用于手机等具有显示功能的触控屏,也可以应用于其他不需要显示功能的触控屏。因此,导电层的材料可以仅具有导电效果即可。
可选地,基板是玻璃基板,也可以是聚对苯二甲酸乙二醇酯(polyethylene terephthalate,PET),或,聚酰亚胺(polyimide,PI),或,固化的胶层等,此处不做任何限定。
上述采用第一沟槽包括主槽和加宽槽的方式描述了第一沟槽,下面,采用第一沟槽的端部和主体部对第一沟槽做一描述。
参考图5,触控屏200包括依次层叠设置的基板210和导电层220,触控屏200能够沿弯折轴被折弯。参考图6,导电层220包括多个第一沟槽222,第一沟槽222包括第一端部222-B1、第二端部222-B2以及位于第一端部222-B1和第二端部222-B2之间的主体部222-A,第一端部222-B1在x轴上投影的长度大于主体部222-A中与第一端部222-B1接触的部分在x轴上投影的长度,且第二端部222-B2在x轴上投影的长度大于主体部222-A中与第二端部222-B2接触的部分在x轴上投影的长度。
其中,主体部222-A可以对应上文的主槽222-A,第一沟槽222的端部可以对应上文的 加宽槽,第一沟槽222的第一端部222-B1可以对应上文的第一加宽槽222-B1,主体部222-A中与第一端部222-B1接触的部分可以对应上文的主槽222-A的第一端部,第一沟槽222的第二端部222-B2可以对应上文的第二加宽槽222-B2,主体部222-A中与第二端部222-B2接触的部分可以对应上文的主槽222-A的第二端部。第一沟槽的各个部分的具体描述可以参考上文的相关描述,此处不再赘述。
以下,结合图10,对本申请的导电层的图形化设计流程做一示例性说明。应理解,其他可以生成导电层的方式都可以,图10仅是示意性说明。图10的过程可以分为6个步骤,具体如下描述。
第一步(1),通过物理气相沉积(physical vapor deposition,PVD)或者化学气相沉积(chemical vapor deposition,CVD)或者其他成膜技术在基板210上形成一层均匀的透明导电膜220,形成导电层;
第二步(2),通过涂布(coating)技术在透明导电膜220上形成一层光阻膜230;
第三步(3),进入曝光机中,按照设计好的掩膜板(mask)240,通过一定波长和功率的光照来曝光光阻膜230,其中,掩膜板240的图案包括上文所述的边界间隔槽和具有加宽槽的第一沟槽;
第四步(4),将光阻膜230曝光完后,在特殊的显影工序中显影,去除部分光阻胶,实现光阻膜的图形化。
第五步(5),通过蚀刻工序,对透明导电膜220做蚀刻,实现光阻膜的图案转移到透明导电膜220上。
第六步(6),将透明导电膜220上的光阻膜230去除,实现透明导电膜220的图形化制作,生成包括边界间隔槽和第一沟槽的透明导电膜。
本申请还提供了一种屏幕模组,参考图2,屏幕模组10包括依次层叠的柔性显示屏110、触控屏120和盖板130,其中,触控屏120包括基板和导电层,具体描述可以参考上文关于触控屏200的详细描述,不再赘述。
本申请还提供了一种电子设备,参考图1,该电子设备100包括弯折轴20和屏幕模组10,屏幕模组10可以绕弯折轴20弯折,以实现包括屏幕组件10在内的电子设备的折叠或展开。参考图2,屏幕模组10包括依次层叠设置的柔性显示屏110、触控屏120和盖板130,关于触控屏120的具体描述可以参考上文关于触控屏200的详细描述,不再赘述。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。
Claims (12)
- 一种触控屏,其特征在于,所述触控屏能够沿弯折轴被折弯,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括主槽以及第一加宽槽,所述第一加宽槽与所述主槽的第一端部相连通,所述主槽的长度在所述弯折轴所在方向上的分量大于0,所述第一加宽槽在x轴上投影的长度大于所述第一端部在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴与所述弯折轴所在的平面为所述触控屏的表面所在的平面。
- 根据权利要求1所述的触控屏,其特征在于,所述第一加宽槽在所述x轴上投影的长度大于或等于所述第一端部在所述x轴上投影的长度的1.5倍。
- 根据权利要求1或2所述的触控屏,其特征在于,所述第一加宽槽的槽壁的至少一部分为弧形槽壁。
- 根据权利要求3所述的触控屏,其特征在于,所述弧形槽壁基于倒角设计形成。
- 根据权利要求3所述的触控屏,其特征在于,所述弧形槽壁的曲率半径大于所述第一端部的宽度的0.5倍。
- 根据权利要求1至5中任一项所述的触控屏,其特征在于,所述第一沟槽还包括第二加宽槽,所述第二加宽槽与所述主槽的第二端部相连通,所述第二加宽槽在所述x轴上投影的长度大于所述第二端部在所述x轴上投影的长度。
- 根据权利要求1至6中任一项所述的触控屏,其特征在于,所述导电层还包括至少一个边界间隔槽,所述边界间隔槽设置在所述导电层中相邻的两个区之间以隔离所述两个区,所述两个区都是电极区,或,所述两个区中的一个区是电极区另一个区是非电极区,或,所述两个区都是非电极区,所述第一沟槽设置在所述导电层中除至少一个所述边界间隔槽以外的至少部分区域。
- 根据权利要求1至7中任一项所述的触控屏,其特征在于,所述主槽的长度在所述x轴所在方向上的分量等于0。
- 根据权利要求1至8中任一项所述的触控屏,其特征在于,所述导电层是透明导电层。
- 一种触控屏,其特征在于,所述触控屏能够沿弯折轴被折弯,所述触控屏包括导电层,所述导电层包括多个第一沟槽,所述第一沟槽包括第一端部、第二端部以及位于所述第一端部和所述第二端部之间的主体部,所述第一端部在x轴上投影的长度大于所述主体部中与所述第一端部接触的部分在所述x轴上投影的长度,且所述第二端部在所述x轴上投影的长度大于所述主体部中与所述第二端部接触的部分在所述x轴上投影的长度,所述x轴垂直于所述弯折轴,且所述x轴和所述弯折轴所在的平面为所述触控屏的表面所在的平面。
- 一种屏幕模组,其特征在于,包括:依次层叠设置的柔性显示屏、如权利要求1至9中任一项所述的触控屏和盖板,或,依次层叠设置的柔性显示屏、如权利要求10所述的触控屏和盖板。
- 一种电子设备,其特征在于,包括:弯折轴和如权利要求11所述的屏幕模组, 所述屏幕模组能够沿所述弯折轴进行弯折。
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