WO2021093366A1 - 触控基板及显示装置 - Google Patents
触控基板及显示装置 Download PDFInfo
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- WO2021093366A1 WO2021093366A1 PCT/CN2020/103830 CN2020103830W WO2021093366A1 WO 2021093366 A1 WO2021093366 A1 WO 2021093366A1 CN 2020103830 W CN2020103830 W CN 2020103830W WO 2021093366 A1 WO2021093366 A1 WO 2021093366A1
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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
- G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
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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
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
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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
- 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
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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
- G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
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- G—PHYSICS
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- 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
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- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
Definitions
- the present disclosure relates to the field of touch display technology, and in particular to a touch substrate and a display device.
- the mutual-capacitive touch structure is prone to abnormal touch point detection in the case of low ground mass (LGM).
- LGM low ground mass
- the capacitance formed by the finger and the ground in the case of weak grounding is very small, the ability of this path to pass current is very weak, resulting in the decrease of the mutual capacitance change detected by the touch chip, even due to the formation of the finger and the touch drive electrode
- the capacitance, and the connection of the capacitance formed by the finger and the touch sensing electrode causes the total equivalent capacitance to increase, and the touch chip cannot be detected normally.
- an embodiment of the present disclosure provides a touch substrate, including a base substrate, and touch drive electrodes, touch sensing electrodes, and ground electrodes that are insulated from each other on the base substrate;
- the touch driving electrode includes a plurality of driving electrode blocks arranged in an array
- the touch sensing electrode includes a plurality of driving electrode blocks arranged in an array. Arranged sensing electrode blocks;
- the touch driving electrode further includes a plurality of first bridge sub-electrodes arranged in different layers from the plurality of driving electrode blocks for electrically connecting adjacent driving electrode blocks, or, the touch sensing electrode further includes a plurality of A plurality of second bridging sub-electrodes arranged in different layers of the sensing electrode blocks are used to electrically connect adjacent sensing electrode blocks.
- the touch substrate provided in the embodiment of the present disclosure further includes: a ground trace on the base substrate, and the ground trace is electrically connected to the ground electrode.
- the ground electrode is provided in the same layer as the driving electrode block and the sensing electrode block.
- the touch substrate provided by the embodiment of the present disclosure further includes: floating electrodes, the floating electrodes are arranged in the same layer as the driving electrode block and the sensing electrode block and are insulated from each other. ;
- the floating electrode is located between the driving electrode block and the ground electrode;
- the floating electrode is located between the sensing electrode block and the ground electrode.
- the floating electrode surrounds the ground electrode.
- the shape of the floating electrode is the same as the shape of the edge of the ground electrode.
- the floating electrode is a strip electrode, and the long side of the floating electrode is adjacent to the side of the ground electrode parallel.
- the grounding trace and the bridging sub-electrode are provided in the same layer.
- the ground electrode is located on a side of the base substrate away from the driving electrode block and the sensing electrode block.
- the orthographic projection of the ground electrode on the base substrate is in the same position as the touch driving electrode and the touch sensing electrode.
- the orthographic projections on the base substrate do not overlap each other.
- the grounding trace and the grounding electrode are provided in the same layer.
- the driving electrode block and/or the sensing electrode block have a hollow area
- the hollow area is located in the central area of the driving electrode block and/or the sensing electrode block.
- the ground electrode is located in the hollow area.
- the ground electrode is located in the gap area.
- the ground electrode is a strip-shaped electrode, and the long side of the ground electrode is connected to the driving electrode block and the sensing electrode.
- the adjacent edges of the blocks are arranged in parallel.
- the area occupied by the ground electrode is 20%-40% of the area occupied by the driving electrode block and the sensing electrode block.
- the embodiments of the present disclosure also provide a display device, including the touch substrate and the display device provided by any of the above embodiments;
- the touch substrate is attached to one side of the light-emitting surface of the display panel, or the touch substrate is embedded in the display panel.
- FIG. 1 is a schematic diagram of a circuit structure of a touch substrate when a touch occurs in the related art
- FIG. 2 is a schematic diagram of a structure of a touch substrate provided by an embodiment of the disclosure.
- FIG. 3 is a schematic diagram of a structure of a touch substrate provided by an embodiment of the disclosure.
- FIG. 4 is a schematic diagram of a circuit structure of a touch substrate when a touch occurs according to an embodiment of the disclosure
- 5a is a schematic diagram of a cross-sectional structure of a touch substrate provided by an embodiment of the disclosure.
- FIG. 5b is a schematic diagram of another cross-sectional structure of a touch substrate provided by an embodiment of the disclosure.
- FIG. 6 is a schematic diagram of another cross-sectional structure of a touch substrate provided by an embodiment of the disclosure.
- FIG. 7 is a schematic diagram of a cross-sectional structure of a display device provided by an embodiment of the disclosure.
- FIG. 8 is a schematic diagram of another cross-sectional structure of a display device provided by an embodiment of the disclosure.
- the schematic diagram of the circuit structure of the ultra-thin stack structure in the case of weak grounding is shown in Figure 1.
- the capacitance C bE formed between the finger and the ground E is very small.
- the ability to pass current is very weak, resulting in a small amount of change in the total equivalent capacitance detected on the sensing electrode block RX; even due to the capacitance C ftx formed by the finger and the driving electrode block TX, and the finger and the sensing electrode block RX.
- the connection of the capacitor C frx leads to an increase in the total equivalent capacitance.
- the touch chip connected to the sensing electrode block RX can detect the touch position normally only when the decrease in the total equivalent capacitance is greater than the preset threshold.
- embodiments of the present disclosure provide a touch substrate and a display device.
- a touch substrate and a display device In order to make the objectives, technical solutions and advantages of the present disclosure clearer, specific implementations of a touch substrate and a display device provided by embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. And if there is no conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.
- an embodiment of the present disclosure provides a touch substrate, as shown in FIGS. 2 and 3, the touch substrate includes: a base substrate (not specifically shown in the figure), which are located on the base substrate and are insulated from each other The touch driving electrode 1, the touch sensing electrode 2 and the ground electrode GND;
- the ground electrode needs to be insulated from the touch driving electrode and the touch sensing electrode, because during touch, these three kinds of electrodes need to be formed with the finger.
- Capacitance secondly, the ground electrode needs to have a non-overlapping area with the touch driving electrode and touch sensing electrode, that is, the ground electrode cannot be completely blocked by the touch driving electrode and touch sensing electrode, and there may be partial shielding. This is because when If the touch driving electrode and touch sensing electrode completely shield the ground electrode, the ground signal on the ground electrode will be shielded. When the finger is touched, it cannot form a capacitance with the ground electrode, which will not improve the touch position detection when the ground is weak. Unusual problem.
- the relative positional relationship between the ground electrode and the touch driving electrode and the touch sensing electrode may be as shown in FIG. 2 or as shown in FIG. 3.
- the ground electrode may also be another area that satisfies the above conditions. There is no specific limitation here.
- the schematic diagram of the circuit structure when the touch occurs is shown in FIG. 4, and the finger and the ground electrode GND form a capacitance C f-GND when the touch occurs.
- C f-GND is connected in parallel with C ftx and C frx , the total equivalent capacitance reduction is increased.
- the decrease is the difference between the total equivalent capacitance detected on the sensing electrode block RX when a touch occurs and the capacitance formed by the driving electrode block TX and the sensing electrode block RX when no touch occurs.
- the touch control chip obtains the reduction amount, it can accurately detect the position where the touch occurs.
- the capacitance formed between the finger and the ground is increased, so that the capacitance formed between the finger and the ground and the finger and the touch drive
- the capacitance formed by the electrode and the capacitance formed by the finger and the touch sensing electrode are connected in parallel, reducing the total equivalent capacitance and increasing the variation of the total equivalent capacitance, which is conducive to the detection of touch points by the touch chip and increases the touch points The accuracy of detection.
- the touch driving electrode 1 includes a plurality of driving electrode blocks TX arranged in an array, and the touch sensing electrode 2 Including a plurality of sensing electrode blocks RX arranged in an array;
- the touch driving electrode 1 further includes a plurality of first bridge sub-electrodes B1 arranged in different layers from the plurality of driving electrode blocks TX for electrically connecting the adjacent driving electrode blocks TX, or, the touch sensing electrode 2 further includes a plurality of A plurality of second bridging sub-electrodes B2 arranged in different layers of the sensing electrode block RX are used to electrically connect adjacent sensing electrode blocks RX.
- FIG. 5a is a schematic cross-sectional structure diagram of the touch substrate, in which the touch driving electrode 1 includes a first bridge sub-electrode B1 arranged in a different layer from the driving electrode block TX.
- the connecting electrodes between the sensing electrode blocks RX are arranged on the same layer as the sensing electrode blocks RX.
- An insulating layer 4 is provided between the driving electrode block TX and the first bridging sub-electrode B1, and the driving electrode block TX is electrically connected to the first bridging sub-electrode B1 through a via provided on the insulating layer 4.
- FIG. 5b is a schematic diagram of another cross-sectional structure of the touch substrate, in which the touch sensing electrode 2 includes a second bridge that is arranged in a different layer from the driving electrode block RX.
- the electrode B2 is taken as an example for illustration.
- the connecting electrodes between the driving electrode blocks TX are arranged on the same layer as the driving electrode blocks TX.
- An insulating layer 4 is provided between the sensing electrode block RX and the second bridging sub-electrode B2, and the sensing electrode block RX is electrically connected to the second bridging sub-electrode B2 through a via provided on the insulating layer 4.
- the touch substrate provided by the embodiment of the present disclosure, as shown in FIG. 5a and FIG. 5b, it further includes: a ground trace G1 located on the base substrate 3, and the ground trace G1 is electrically connected to the ground electrode GND .
- the touch substrate provided by the embodiment of the present disclosure further includes a ground wire electrically connected to the ground electrode.
- One end of the ground wire is connected to the ground electrode, and the other end is connected to the ground structure of the device where it is located.
- the voltage on the ground trace is the ground voltage.
- 5a shows that when the ground electrode GND is arranged on the same layer as the driving electrode block TX and the sensing electrode block RX, the ground trace G1 and the bridge sub-electrode B1 are arranged on the same layer.
- the ground trace G1 can be provided on the same layer as the ground electrode GND.
- the ground trace G1 can also be provided on other film layers, and is electrically connected to the ground electrode GND through the provided vias. Different choices can be made according to different designs, which are not specifically limited here.
- the ground electrode GND is arranged on the same layer as the driving electrode block TX and the sensing electrode block RX.
- the ground electrode GND is arranged on the same layer as the driving electrode block TX and the sensing electrode block RX. This arrangement reduces the number of film layers. , The thickness of the touch substrate can be effectively reduced, so that the touch substrate can be embedded with the display panel, and can be applied to a flexible display device.
- the ground electrode is disposed on the same layer as the driving electrode block and the sensing electrode block.
- the same layer configuration may be that the ground electrode is located on the same layer as the touch electrode block and the sensing electrode block.
- the ground electrode, the touch electrode and the sensing electrode are of the same material and the same preparation process is used for patterning, which can be selected according to the actual design of the touch substrate, which is not specifically limited here.
- the touch substrate provided by the embodiment of the present disclosure, as shown in FIG. 2, FIG. 3, FIG. 5a, and FIG. 5b, it further includes: floating electrode S, floating electrode S and driving electrode block TX and sensing
- the electrode block RX is on the same layer and insulated;
- the floating electrode S is located between the driving electrode block TX and the ground electrode GND;
- the floating electrode S is located between the sensing electrode block RX and the ground electrode GND.
- the floating electrode is arranged mainly to reduce the influence of the ground voltage on the ground electrode on the signal applied to the driving electrode block and the sensing electrode block, so as to improve the touch Control the accuracy of detection.
- the ground electrode GND in the touch substrate provided by the embodiment of the present disclosure, there are multiple choices for the positions and shapes of the ground electrode GND and the floating electrode S.
- the location of the ground electrode GND as shown in Figure 2, hollow areas can be provided in the driving electrode block TX and/or the sensing electrode block RX, and the ground electrode GND can be placed in the hollow areas, or as shown in Figure 3,
- the ground electrode GND is disposed in the gap area between the adjacent driving electrode block TX and the sensing electrode block RX.
- the ground electrode GND when the ground electrode GND is arranged in the hollow area, the ground electrode GND can be a block electrode, such as a rectangle, a diamond, a circle, or an ellipse.
- the ground electrode GND is arranged on the adjacent drive electrode block TX and the sensing electrode. In the gap area between the blocks RX, since the width of the gap area is limited, the ground electrode GND can be set as a strip electrode. However, the ground electrode GND may also have other shapes, and its specific shape is still flexibly selected according to the actual design, which is not specifically limited here.
- the floating electrode S surrounds the ground electrode GND.
- the floating electrode S can be made Surrounding the ground electrode GND, so as to play a role of signal shielding on all sides of the ground electrode GND.
- the shape of the floating electrode S is the same as the shape of the edge of the ground electrode GND.
- ground electrode when the ground electrode is rectangular, its adjacent floating electrodes enclose a rectangular area; when the ground electrode is circular, its adjacent floating electrodes enclose a circular area. Make reasonable use of the space in the hollow area.
- the floating electrode S is a strip electrode, and the long side of the floating electrode S is parallel to the side adjacent to the ground electrode GND .
- the ground electrode GND when the ground electrode GND is located in the gap area between the driving electrode block TX and the sensing electrode block RX, the ground electrode GND is arranged in a stripe shape. electrode.
- the floating electrode S can also be arranged as a strip electrode and arranged between the ground electrode GND and the driving electrode block TX, and/or the floating electrode S can be arranged at Between the ground electrode GND and the sensing electrode block RX, and the long side of the floating electrode GND can be parallel to the side connected to the ground electrode GND, so that the extension length of the floating electrode S can be increased as much as possible, and the ground electrode GND and the floating electrode block RX can be avoided.
- the electrode S is short-circuited.
- the ground trace G1 and the bridge sub-electrodes B1/B2 are arranged on the same layer.
- the ground trace and the bridge sub-electrode may be arranged in the same layer, and the The insulating layer between the bridge electrode and the bridge electrode is provided with a via hole to electrically connect the ground electrode with the ground wire.
- This structure can reduce the film layer setting, and can be formed by the same process as the bridge sub-electrode, which simplifies the manufacturing process.
- the ground trace can also be located on a separate film layer, which can be selected according to actual needs, and is not specifically limited here.
- FIG. 6 is another schematic cross-sectional structure diagram of FIG. 2.
- the ground electrode GND is located on the base substrate 3 away from the driving electrode block TX and the sensing One side of the electrode block RX.
- the ground electrode on the touch substrate may also be arranged on the base substrate away from the driving electrode.
- the influence of the ground electrode on the signal applied to the touch electrode block and the sensing electrode block can be reduced, and the requirement on the etching accuracy of the ground electrode can also be reduced.
- the ground electrode when the thickness of the base substrate is relatively thick (50um-60um), the ground electrode can be arranged in a whole layer, which reduces the etching process.
- the orthographic projection of the ground electrode on the base substrate and the orthographic projection of the touch drive electrode and the touch sensing electrode on the base substrate do not overlap each other.
- the ground electrode will have a direct facing area with the driving electrode block and the sensing electrode block.
- the driving electrode block and the sensing electrode block form a capacitance, which causes the ground voltage on the ground electrode to affect the signal applied on the driving electrode block and the sensing electrode block. Therefore, the ground electrode is arranged at the gap area of the film layer where the driving electrode block and the sensing electrode block are located, which can prevent the ground electrode from having a direct facing area with the driving electrode block and the sensing electrode block, thereby reducing the ground voltage on the ground electrode. The influence of the signal applied to the driving electrode block and the sensing electrode block.
- the ground wiring and the ground electrode are provided in the same layer.
- the touch substrate provided by the embodiment of the present disclosure, since the ground electrode is disposed on the side of the base substrate away from the driving electrode block and the sensing electrode block, the film layer space where the ground electrode is located is sufficient, and the The ground trace is directly arranged on the same layer as the ground electrode, no additional film layer is required, and no via is etched for connection, which simplifies the preparation process.
- the touch substrate provided by the embodiment of the present disclosure, as shown in FIG. 2, there is a hollow area in the driving electrode block TX and/or the sensing electrode block RX;
- the driving electrode block and the sensing electrode on the base substrate have a non-overlapping area, so as to facilitate the formation of a capacitance to the ground between the finger and the ground electrode.
- a hollow area can be provided on each driving electrode block TX and/or sensing electrode block RX, and the ground electrode GND in the hollow area will not be blocked by the driving electrode block TX and the sensing electrode block RX.
- the area of the driving electrode block TX and the sensing electrode block RX is also reduced correspondingly, and the load capacitance formed by the driving electrode block TX and the sensing electrode block RX and the cathode layer in the display panel is also correspondingly reduced. , Which helps to improve the accuracy of touch detection.
- the hollow area may be set in the central area of the driving electrode block TX and/or the sensing electrode block RX, which is beneficial to the hollow area.
- the graphics are designed to ensure the uniformity of the coverage area of the driving electrode block TX and/or the sensing electrode block RX located around the hollow area in all directions.
- the hollow area may also be located in a non-central area of the driving electrode block TX and/or the sensing electrode block RX, which can be selected according to actual design requirements, and is not specifically limited here.
- the ground electrode GND is located in the hollow area.
- the ground electrode GND is arranged in the hollow area, where the ground electrode GND can be arranged on the same layer as the driving electrode block TX and the sensing electrode block RX. , It can also be set in different layers, which can ensure that the ground electrode GND does not have a direct facing area with the driving electrode block TX and the sensing electrode block RX. This setting can ensure that the ground electrode GND and the driving electrode block TX do not form a capacitance, and the ground electrode GND It does not form a capacitance with the sensing electrode block RX, thereby ensuring that the touch signal loaded on the driving electrode block TX and the sensing electrode block RX is stable.
- the orthographic projection of the gap area between the driving electrode block TX and the sensing electrode block RX on the base substrate is in line with the ground electrode GND. There is an overlap area in the orthographic projection on the base substrate.
- the touch substrate provided by the embodiment of the present disclosure, in addition to the above-mentioned method of providing hollow areas on the driving electrode block and the sensing electrode block to avoid shielding the ground electrode, it can also be used to arrange the ground electrode on the driving electrode.
- the gap area between the block and the sensing electrode block in addition to the above-mentioned method of providing hollow areas on the driving electrode block and the sensing electrode block to avoid shielding the ground electrode, it can also be used to arrange the ground electrode on the driving electrode.
- the gap area between the block and the sensing electrode block in addition to the above-mentioned method of providing hollow areas on the driving electrode block and the sensing electrode block to avoid shielding the ground electrode.
- the ground electrode GND may be disposed in the gap area between the driving electrode block TX and the sensing electrode block RX, so that the ground electrode GND is adjacent to the There is no overlapping area between the driving electrode block TX and the sensing electrode block RX, which ensures the stability of the touch signal loaded on the driving electrode block TX and the sensing electrode block RX.
- the ground electrode GND when the ground electrode GND is arranged in the gap area between the driving electrode block TX and the sensing electrode block RX, the ground electrode GND can be arranged in a long strip shape, and the long side of the ground electrode GND can be connected to The adjacent edges of the driving electrode block TX and the sensing electrode block RX are parallel to make a reasonable use of the space in the gap area.
- the ground electrode GND can have other shapes in addition to being a long strip electrode, and can be selected according to actual design requirements, which is not specifically limited here.
- the area occupied by the ground electrode is 20%-40% of the area occupied by the driving electrode block and the sensing electrode block.
- the area occupied by the ground electrode is set to 20%-40% of the area occupied by the driving electrode block and the sensing electrode block, which can ensure the area of the touch area and It can ensure the realization of the ground electrode function, while appropriately reducing the area of the driving electrode block and the sensing electrode block can also reduce the load capacitance formed by the driving electrode block and the sensing electrode block and the cathode in the display panel, increasing the accuracy of touch detection .
- embodiments of the present disclosure also provide a display device, which includes the touch substrate and the display panel provided in any of the above embodiments; the touch substrate is attached to one side of the light-emitting surface of the display panel, or , The touch substrate is embedded in the display panel.
- the structure when the touch substrate and the display panel are in an in-cell design, the structure is as shown in FIG. 7, which in turn includes the display panel 100 and the touch panel on the base substrate 3.
- the control substrate 200 and the encapsulation cover 300 this structure can directly produce touch structures on the touch substrate 200, such as touch driving electrodes, touch sensing electrodes, and ground electrodes, after each film layer of the display panel 100 is manufactured. After the touch structure is manufactured, unified packaging is performed. This arrangement can reduce the film layer arrangement, which is beneficial to the slimming of the display device.
- the structure is shown in FIG. 8, including the display panel 100, the first packaging structure 301, the touch substrate 200, and the second packaging structure 302 which are sequentially located on the base substrate 3. . That is to say, the touch substrate is directly attached to the already packaged display panel, and the display panel and the touch substrate can be manufactured separately, which can reduce the difficulty of manufacturing.
- the display device has all the advantages of the touch substrate provided in the above embodiment, and its principle and specific implementation are the same as the touch substrate provided in the above embodiment. Refer to the embodiment of the touch substrate provided in the above embodiment for implementation. , I won’t repeat it here.
- the embodiments of the present disclosure provide a touch substrate and a display device.
- the touch substrate includes a base substrate, a touch drive electrode, a touch sensing electrode, and a ground electrode that are insulated from each other on the base substrate; Both the orthographic projection of the ground electrode on the base substrate and the orthographic projection of the touch drive electrode and the touch sensing electrode on the base substrate have non-overlapping regions.
- the capacitance formed between the finger and the ground is increased, so that the capacitance formed by the finger and the ground and the capacitance formed by the finger and the touch drive electrode and the capacitance formed by the finger and the touch sensing electrode are connected in parallel , Reducing the total equivalent capacitance, increasing the amount of change in the total equivalent capacitance, which is conducive to the detection of touch points by the touch chip, and increases the detection accuracy of the touch points.
Abstract
Description
Claims (20)
- 一种触控基板,其中,包括:衬底基板,位于所述衬底基板上相互绝缘的触控驱动电极、触控感应电极和接地电极;所述接地电极在所述衬底基板上的正投影与所述触控驱动电极和所述触控感应电极在所述衬底基板上的正投影均存在非重叠区域。
- 如权利要求1所述的触控基板,其中,所述触控驱动电极包括多个呈阵列排布的驱动电极块,所述触控感应电极包括多个呈阵列排布的感应电极块;所述触控驱动电极还包括与多个所述驱动电极块异层设置的多个第一桥接子电极用于电连接相邻的所述驱动电极块,或,所述触控感应电极还包括与多个所述感应电极块异层设置的多个第二桥接子电极用于电连接相邻的所述感应电极块。
- 如权利要求2所述的触控基板,其中,还包括:位于衬底基板上的接地走线,所述接地走线与所述接地电极电连接。
- 如权利要求3所述的触控基板,其中,所述接地电极与所述驱动电极块和所述感应电极块同层设置。
- 如权利要求4所述的触控基板,其中,还包括:浮接电极,所述浮接电极与所述驱动电极块和所述感应电极块同层且绝缘设置;所述浮接电极位于所述驱动电极块与所述接地电极之间;和/或,所述浮接电极位于所述感应电极块与所述接地电极之间。
- 如权利要求5所述的触控基板,其中,所述浮接电极包围所述接地电极。
- 如权利要求6所述的触控基板,其中,所述浮接电极的形状与所述接地电极边缘的形状相同。
- 如权利要求5所述的触控基板,其中,所述浮接电极为条状电极,且所述浮接电极的长边与所述接地电极相邻的侧边平行。
- 如权利要求4所述的触控基板,其中,所述接地走线与所述桥接子电极同层设置。
- 如权利要求3所述的触控基板,其中,所述接地电极位于所述衬底基板远离所述驱动电极块和所述感应电极块的一侧。
- 如权利要求10所述的触控基板,其中,所述接地电极在所述衬底基板上的正投影与所述触控驱动电极和所述触控感应电极在所述衬底基板上的正投影互不重叠。
- 如权利要求11所述的触控基板,其中,所述接地走线与所述接地电极同层设置。
- 如权利要求2-12任一项所述的触控基板,其中,所述驱动电极块和/或所述感应电极块存在镂空区域;所述镂空区域在所述衬底基板上的正投影与所述接地电极在所述衬底基板上的正投影存在交叠区域。
- 如权利要求13所述的触控基板,其中,所述镂空区域位于所述驱动电极块和/或所述感应电极块的中心区域。
- 如权利要求14所述的触控基板,其中,所述接地电极位于所述镂空区域内。
- 如权利要求2-12任一项所述的触控基板,其中,所述驱动电极块和所述感应电极块之间的间隙区域在所述衬底基板上的正投影与所述接地电极在所述衬底基板上的正投影存在交叠区域。
- 如权利要求16所述的触控基板,其中,所述接地电极位于所述间隙区域内。
- 如权利要求17所述的触控基板,其中,所述接地电极为长条形电极,且所述接地电极的长边与所述驱动电极块和所述感应电极块相邻的边缘平行设置。
- 如权利要求2所述的触控基板,其中,所述接地电极所占面积是所述驱动电极块和所述感应电极块所占面积的20%~40%。
- 一种显示装置,其中,包括权利要求1-19任一项所述的触控基板和显示面板;所述触控基板贴附于所述显示面板出光面的一侧,或,所述触控基板内嵌于所述显示面板内。
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CN113467629A (zh) * | 2020-03-31 | 2021-10-01 | 深圳市柔宇科技有限公司 | 触控面板及其制备方法、显示组件、电子设备 |
CN111552414B (zh) * | 2020-04-24 | 2023-12-01 | 京东方科技集团股份有限公司 | 一种触控基板和显示面板 |
CN111596805B (zh) * | 2020-07-27 | 2020-10-23 | 武汉华星光电半导体显示技术有限公司 | 触控显示装置 |
CN112799549A (zh) * | 2021-02-05 | 2021-05-14 | 南昌欧菲显示科技有限公司 | 触控屏及电子设备 |
CN113031810B (zh) * | 2021-02-26 | 2022-12-06 | 武汉华星光电半导体显示技术有限公司 | 触控面板和显示装置 |
CN113126822B (zh) | 2021-04-12 | 2022-09-09 | 武汉华星光电半导体显示技术有限公司 | 触控显示面板及显示装置 |
WO2022246672A1 (zh) * | 2021-05-26 | 2022-12-01 | 广州视源电子科技股份有限公司 | 一种电容触控组件、电容屏及触控设备 |
WO2022252115A1 (zh) * | 2021-06-01 | 2022-12-08 | 广州视源电子科技股份有限公司 | 一种触控基板、触控驱动方法、触控输入设备的识别方法及触控设备 |
CN113608638B (zh) * | 2021-08-17 | 2024-04-09 | 京东方科技集团股份有限公司 | 触控基板及其制备方法、显示装置 |
CN114138135B (zh) * | 2021-12-03 | 2024-03-12 | 北京翌光医疗科技研究院有限公司 | 一种触控发光面板、制备方法以及触控发光装置 |
CN114327134A (zh) * | 2021-12-22 | 2022-04-12 | 深圳市华星光电半导体显示技术有限公司 | 显示装置及其制作方法 |
KR20230124144A (ko) * | 2022-02-17 | 2023-08-25 | 삼성디스플레이 주식회사 | 전자 장치 |
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