Touch display device and touch method therefor

Abstract

A touch display device (100) and a touch method therefor. The touch display device (100) is additionally provided with a pattern layer (22) comprising a plurality of minimum units (2a); one touch electrode (211) is correspondingly provided with the plurality of minimum units (2a); each feature body (a1) of the pattern layer (22) is configured to be recognized by an external active pen (10); and each first pattern (t1) has position information, and then the external active pen (10) acquires first coordinate information of a contact of the active pen (10), and second coordinate information is corrected by using the first coordinate information.

Description

Touch display device and touch control method thereof Technical Field

[0001] The present application relates to the field of display technology, and in particular to a touch display device and a touch control method thereof. Background Art

[0002] Active pens have become a widely used display input device in recent years. To ensure the accuracy of active pens, the touch chip typically requires a sufficient number of touch channels, while the touch electrodes on the panel must be small. As panel sizes increase, the driver chip's touch channels become insufficient, resulting in reduced touch accuracy for active pens. Technical issues

[0003] The embodiments of the present application provide a touch display device and a touch method thereof, which can improve the touch accuracy of an active pen. Technical Solutions

[0004] In one aspect, an embodiment of the present application provides a touch display device, including an active pen and a touch screen, wherein the touch screen includes:

[0005] A touch structure layer, the touch structure layer comprising a plurality of touch electrodes;

[0006] a pattern layer, the pattern layer being disposed on the light-emitting side of the touch structure layer, the pattern layer comprising a plurality of minimum units; in the orthographic projection pattern of the touch screen, a region where the touch electrodes are located is correspondingly configured with a plurality of the minimum units arranged in an array, the minimum units comprising at least two different features, and the at least two different features being arranged to form a first pattern;

[0007] a controller electrically connected to the plurality of touch electrodes;

[0008] The feature of the pattern layer is configured to be recognized by an external active stylus, and the first pattern has position information.

[0009] On the other hand, correspondingly, an embodiment of the present application further provides a touch control method for a touch display device, the touch display device including an active pen and a touch screen, the touch screen including a touch structure layer and a pattern layer, the touch structure layer including a plurality of touch electrodes, the pattern layer being disposed on the touch structure layer, the pattern layer including a plurality of minimum units; in an orthographic projection pattern of the touch screen, a plurality of the minimum units arranged in an array are stacked on one of the touch electrodes, the minimum unit including at least two different features, and the at least two different features being arranged to form a first pattern;

[0010] The touch control method of the touch display device comprises the following steps:

[0011] receiving first coordinate information of a touch point of the active pen, where the first coordinate information is obtained after the first pattern is recognized and processed by an external active pen;

[0012] acquiring second coordinate information of a touch point of the active pen according to a touch signal of the active pen received by the touch electrode;

[0013] The real-time coordinates of the active pen touch point are obtained according to the first coordinate information and the second coordinate information. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a schematic structural diagram of a touch display device provided by an embodiment of the present application in combination with an external active pen;

[0015] FIG2 is a schematic structural diagram of a minimum unit of a touch display device provided in an embodiment of the present application;

[0016] FIG3 is a schematic diagram of a top view of the touch screen of the touch display device provided in an embodiment of the present application;

[0017] FIG4 is a schematic structural diagram of a touch screen of a touch display device provided in an embodiment of the present application;

[0018] FIG5 is another structural diagram of the minimum unit of the touch display device provided in an embodiment of the present application;

[0019] FIG6 is another structural diagram of the touch screen of the touch display device provided in an embodiment of the present application;

[0020] FIG7 is another structural diagram of the touch screen of the touch display device provided in an embodiment of the present application;

[0021] FIG8 is a schematic diagram of the deviation of the pattern layer and pixel layer coordinate systems provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as labels and do not impose numerical requirements or establish an order.

[0023] The embodiments of the present application provide a touch display device and a touch method thereof, which are described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments.

[0024] An embodiment of the present application provides a touch display device, including an active pen and a touch screen, wherein the touch screen includes:

[0025] A touch structure layer, the touch structure layer comprising a plurality of touch electrodes;

[0026] a pattern layer, the pattern layer being disposed on the light-emitting side of the touch structure layer, the pattern layer comprising a plurality of minimum units; in the orthographic projection pattern of the touch screen, a region where the touch electrodes are located is correspondingly configured with a plurality of the minimum units arranged in an array, the minimum units comprising at least two different features, and the at least two different features being arranged to form a first pattern;

[0027] a controller electrically connected to the plurality of touch electrodes;

[0028] The feature of the pattern layer is configured to be recognized by an external active stylus, and the first pattern has position information.

[0029] Optionally, in some embodiments of the present application, in the active pen touch stage, the controller is configured to receive first coordinate information obtained after the active pen recognizes the first pattern, and obtain second coordinate information of the active pen touch point based on the touch signal of the active pen received by the touch electrode, and obtain the real-time coordinates of the active pen touch point based on the first coordinate information and the second coordinate information.

[0030] Optionally, in some embodiments of the present application, at least one of the feature bodies is arranged along the peripheral direction of the minimum unit to form a second pattern different from the first pattern, and the second pattern is used to limit the range of the minimum unit, and the first pattern is set in the area enclosed by the second pattern.

[0031] Optionally, in some embodiments of the present application, at least two of the feature bodies are arranged to form a third pattern different from the second pattern, the third pattern is arranged in the area enclosed by the second pattern and on one side of the first pattern, and the third pattern has the position information.

[0032] Optionally, in some embodiments of the present application, any of the features has a shape and a thickness, wherein the shape is the shape of the feature in the orthographic projection pattern of the touch screen, and the thickness is the thickness value in the orthographic projection direction of the touch screen, wherein at least one of the shape and the thickness value is different in two different features;

[0033] Any one of the first pattern and the third pattern includes at least one of a pattern formed by arranging the features of different shapes and a pattern formed by arranging the features of different thicknesses.

[0034] Optionally, in some embodiments of the present application, the pattern formed by the arrangement of the features of different shapes is configured to be captured by a camera and form an image, and the pattern formed by the arrangement of the features of different thicknesses is configured to be captured by an ultrasonic probe and form an image.

[0035] Optionally, in some embodiments of the present application, the first pattern and the third pattern are both patterns formed by arranging at least two different features in a numerical manner, the number of the features is a number base, and one feature is a digital number.

[0036] Optionally, in some embodiments of the present application, the number system is binary, and the at least two different features include a first feature and a second feature, the shape of the first feature is different from the shape of the second feature, the thickness of the first feature is different from the thickness of the second feature, the first feature serves as digital 0, and the second feature serves as digital 1.

[0037] Optionally, in some embodiments of the present application, the shape includes a circle, an ellipse, and a polygon, and the thickness of the first feature body is 1 / 2 of the thickness of the second feature body.

[0038] Optionally, in some embodiments of the present application, the touch screen includes a middle area and an edge area located around the middle area, the feature body includes a first middle feature body, a second middle feature body, a first edge feature body, and a second edge feature body, the first middle feature body and the second middle feature body are located in the middle area, and the first edge feature body and the second edge feature body are located in the edge area;

[0039] The thickness of the second intermediate feature body is n times the thickness of the first intermediate feature body, the thickness of the second edge feature body is n times the thickness of the first edge feature body, the thickness of the second intermediate feature body is greater than the thickness of the second edge feature body, and n is greater than 1.

[0040] Optionally, in some embodiments of the present application, the second pattern is formed by arranging the same type of feature bodies along the peripheral direction of the minimum unit.

[0041] Optionally, in some embodiments of the present application, the touch screen further comprises a substrate, a black matrix layer, and a color resist layer, wherein the black matrix layer is disposed on a side of the substrate away from the touch surface of the touch screen, a plurality of openings are defined in the black matrix layer, and the color resists of the color resist layer are disposed within the openings, the pattern layer is disposed between the substrate and the black matrix layer, and in an orthographic projection pattern of the touch screen, the pattern layer and the black matrix layer are overlapped, and the features are all located on the periphery of the color resist;

[0042] The substrate, the black matrix layer, and the color resist layer are all located on the light-emitting side of the touch structure layer.

[0043] Optionally, in some embodiments of the present application, the touch screen further includes a color film substrate and an array substrate that are relatively and spaced apart from each other, the substrate, the black matrix layer, the color resist layer and the pattern layer are integrated into the color film substrate, and the touch structure layer is integrated into the array substrate.

[0044] Optionally, in some embodiments of the present application, the thickness of the color resist layer is greater than the sum of the thicknesses of the black matrix layer and the pattern layer.

[0045] Optionally, in some embodiments of the present application, the touch screen further includes a display panel, a polarizer, and a cover plate stacked in sequence, and the pattern layer is arranged between the cover plate and the polarizer or on a side of the cover plate away from the polarizer.

[0046] Optionally, in some embodiments of the present application, the display panel includes a color filter substrate and an array substrate that are arranged opposite to and spaced apart from each other, the color filter substrate including a substrate and a color filter layer, the color filter layer being arranged on a side of the substrate close to the array substrate, and the polarizer being arranged on a side of the substrate away from the array substrate;

[0047] The material of the pattern layer includes transparent metal oxide. The display panel further includes a transparent common electrode layer configured to drive liquid crystal deflection. The common electrode layer is arranged on a side of the color filter layer away from the pattern layer.

[0048] Optionally, in some embodiments of the present application, the first coordinate information is (x1, y1), the second coordinate information is (x2, y2), and the real-time coordinate is (x0, y0);

[0049] Wherein, the real-time coordinate (x0, y0)=a(x1, y1)+b(x2, y2), 0<a<1, 0<b<1, a+b=1.

[0050] Optionally, in some embodiments of the present application, a>b.

[0051] Accordingly, an embodiment of the present application further provides a touch control method for a touch display device, the touch display device comprising an active pen and a touch screen, the touch screen comprising a touch structure layer and a pattern layer, the touch structure layer comprising a plurality of touch electrodes, the pattern layer being disposed on the touch structure layer, the pattern layer comprising a plurality of minimum units; in an orthographic projection pattern of the touch screen, a plurality of the minimum units arranged in an array are stacked on one of the touch electrodes, the minimum unit comprising at least two different features, and the at least two different features being arranged to form a first pattern;

[0052] The touch control method of the touch display device comprises the following steps:

[0053] receiving first coordinate information of a touch point of the active pen, where the first coordinate information is obtained after the first pattern is recognized and processed by an external active pen;

[0054] acquiring second coordinate information of a touch point of the active pen according to a touch signal of the active pen received by the touch electrode;

[0055] The real-time coordinates of the active pen touch point are obtained according to the first coordinate information and the second coordinate information.

[0056] The touch display device of the present embodiment comprises a touch screen having a touch structure layer and an additional pattern layer. The pattern layer is disposed on the touch structure layer and includes a plurality of minimum units. In the orthographic projection pattern of the touch screen, a touch electrode is stacked with a plurality of minimum units arranged in an array. The minimum units include at least two different features, and the at least two different features are arranged to form a first pattern. A controller is electrically connected to the plurality of touch electrodes. During the active pen touch phase, the active pen is configured to capture an image of the first pattern and obtain first coordinate information of the active pen touch point based on the image of the first pattern. The controller is configured to obtain second coordinate information of the active pen touch point based on a touch signal from the active pen received by the touch electrode, and obtain real-time coordinates of the active pen touch point based on the first and second coordinate information.

[0057] The touch display device of this embodiment is additionally provided with a pattern layer having multiple minimum units. There are multiple minimum units corresponding to one touch electrode, that is, the accuracy of the minimum unit is greater than the accuracy of the touch electrode. The external active pen obtains the image of the first pattern in the minimum unit under the touch point, and then obtains the first coordinate information of the active pen touch point, and uses the first coordinate information to correct the second coordinate information, thereby improving the touch accuracy of the active pen touch point.

[0058] 1 and 2 , an embodiment of the present application provides a touch display device 100 including a touch screen 20 . The touch display device 100 is further equipped with an active pen 10 to facilitate user input of information into the touch display device 100 .

[0059] The touch screen 20 includes a touch structure layer 21, a pattern layer 22, and a controller (not shown). The touch structure layer 21 includes a plurality of touch electrodes 211. The pattern layer 22 is disposed on the light-emitting side of the touch structure layer 21. The pattern layer 22 includes a plurality of minimum units 2a. In the orthographic projection pattern of the touch screen 20, the area where a touch electrode 211 is located corresponds to a plurality of minimum units 2a arranged in an array. The minimum unit 2a includes at least two different features a1. The at least two different features a1 are arranged to form a first pattern t1. The controller is electrically connected to the plurality of touch electrodes 211.

[0060] The feature a1 of the pattern layer 22 is configured to be recognized by the external active stylus 10. The first pattern t1 has position information. In other words, the active stylus 10 has a recognition module for recognizing the feature a1.

[0061] Among them, in the active pen touch stage, the controller is used to receive the first coordinate information obtained after the active pen 10 recognizes the first pattern t1, and obtain the second coordinate information of the touch point of the active pen 10 according to the touch signal of the active pen 10 received by the touch electrode 211, and obtain the real-time coordinates of the touch point of the active pen 10 according to the first coordinate information and the second coordinate information.

[0062] That is to say, in the active pen touch stage, the recognition module of the active pen 10 is used to obtain the image of the first pattern t1 and obtain the first coordinate information of the touch point of the active pen 10 based on the image of the first pattern t1; the controller is used to obtain the second coordinate information of the touch point of the active pen 10 based on the touch signal of the active pen 10 received by the touch electrode 211, and obtain the real-time coordinates of the touch point of the active pen 10 based on the first coordinate information and the second coordinate information.

[0063] The touch display device 100 of this embodiment includes a pattern layer 22 having multiple minimum units 2a. Each touch electrode 211 corresponds to multiple minimum units 2a, meaning the precision of the minimum units 2a is greater than the precision of the touch electrodes 211. The active pen 10 acquires the image of the first pattern t1 in the minimum unit 2a under the touch point of the active pen 10, thereby obtaining first coordinate information of the touch point of the active pen 10. The first coordinate information is used to correct second coordinate information, thereby improving the touch precision of the touch point of the active pen 10.

[0064] The pattern layer 22 does not need to be connected to a controller, which means that no additional circuits are required, thus saving costs.

[0065] Optionally, a plurality of minimum units 2a are provided on each touch electrode 211. For example, the number of touch electrodes 211 is 2400, which are arranged in a 60*40 matrix. 864 minimum units can be provided in the area where each touch electrode 211 is located, and the 864 minimum units 2a are arranged in a 27*32 matrix.

[0066] Therefore, compared with the touch accuracy based only on the touch electrode 211, the embodiment of the present application adds the pattern layer 22, and the accuracy of the minimum unit 2a is 864 times that of the touch electrode 211. Therefore, with the assistance of the minimum unit 2a, the touch accuracy of the active pen 10 contact point can be greatly improved.

[0067] In one embodiment, the area where one touch electrode 211 is located may be provided with two or more (including two) minimum units 2 a .

[0068] Optionally, the first pattern t1 in each minimum unit 2a is different, and each first pattern t1 represents a position coordinate. The active pen 10 captures an image of the first pattern t1 and interprets the image to convert it into coordinate information. Therefore, different first patterns t1 correspond to different coordinate information.

[0069] Optionally, in one embodiment, the first coordinate information is (x1, y1), the second coordinate information is (x2, y2), and the real-time coordinate is (x0, y0).

[0070] Wherein, the real-time coordinate (x0, y0)=a(x1, y1)+b(x2, y2), 0<a<1, 0<b<1, a+b=1.

[0071] It can be understood that the real-time coordinates of the touch point of the active pen 10 are adjusted using the ratio of weight coefficients a and b, thereby achieving higher accuracy in the real-time coordinates of the touch point of the active pen 10. Since weight coefficient a corresponds to the first coordinate information of the first pattern t1 in the minimum unit 2a, a larger weight coefficient a indicates higher accuracy in the real-time coordinates of the touch point of the active pen 10. Therefore, a>b further improves the accuracy of the real-time coordinates of the touch point of the active pen 10.

[0072] Optionally, the touch screen 20 may be a liquid crystal display screen or an electroluminescent display screen, such as an OLED display screen, a micro light emitting diode display screen or a sub-millimeter light emitting diode display screen.

[0073] The touch structure layer 21 can be attached to the display panel in an external manner, or can be formed in the touch screen 20 in an integrated manner.

[0074] The controller may be directly bound to the display panel of the touch screen 20 , or may be electrically connected to the display panel via a circuit board.

[0075] Optionally, the controller may be a touch chip or a control circuit.

[0076] Optionally, the pattern layer 22 is provided on the light-emitting side of the touch structure layer 21 to prevent the touch structure layer 21 from affecting the recognition module's acquisition of the first pattern t1 in the pattern layer 22 .

[0077] Optionally, in one embodiment, at least one feature body a1 is arranged along the peripheral direction of the minimum unit 2a to form a second pattern t2 different from the first pattern t1, and the second pattern t2 is used to limit the range of the minimum unit 2a, and the first pattern t1 is set in the area enclosed by the second pattern t2.

[0078] The second pattern t2 is used to limit the range of the minimum unit 2a. That is, after the active pen 10 obtains the image of the second pattern t2, it can identify and determine that the range defined by the second pattern t2 is a minimum unit 2a, avoiding the problem of unclear recognition.

[0079] Optionally, the second pattern t2 may be any pattern as long as it is different from the first pattern t1.

[0080] Optionally, in one embodiment, at least two features a1 are arranged to form a third pattern t3 different from the second pattern t2. The third pattern t3 is disposed within the area enclosed by the second pattern t2 and on one side of the first pattern t1, and the third pattern t3 has the position information.

[0081] In one embodiment, the third pattern t3 and the first pattern t1 have the same position information, that is, the recognition module can obtain the same coordinate information by recognizing the third pattern t3 or the first pattern t1, which is equivalent to the third pattern t3 being a backup of the position information of the first pattern t1.

[0082] During a touch test, when the recognition module fails to recognize the first pattern t1 or recognizes a deviation in the first pattern t1 , the correct position information can be obtained by recognizing the third pattern t3 , thereby reducing the risk of position coordinate deviation of the touch point of the stylus 10 .

[0083] Optionally, in one embodiment, the first pattern t1 and the third pattern t3 may be the same pattern, that is, the shape arrangement and thickness arrangement of the first pattern t1 and the third pattern t3 are the same.

[0084] Optionally, in one embodiment, the first pattern t1 and the third pattern t3 may also be different patterns, that is, the first pattern t1 and the third pattern t3 have different shapes and / or different thicknesses.

[0085] Furthermore, in one embodiment, the position information of a third pattern t3 corresponds to the position of a minimum unit 2a. During a touch test, when the active stylus 10 touches the touch screen 20, the active stylus 10 captures an image of the pattern layer 22 in the area of ​​the touch point in real time. After interpreting the image, the second pattern t2 is used to determine the minimum unit 2a where the touch point is located. Based on the information corresponding to the third pattern t3 within the minimum unit 2a, the position of the minimum unit 2a is locked. If a touch point anomaly occurs, the position information corresponding to the third pattern t3 can be used to accurately locate the anomaly and perform repairs.

[0086] For example, after the third pattern t3 is interpreted, the information obtained is the third row and fourth column, so it can be determined that the abnormal point is in the third row and fourth column.

[0087] Optionally, the area surrounded by the second pattern t2 can be divided into two small areas, one small area is used to set the first pattern t1, and the other small area is used to set the third pattern t3, so as to facilitate the distinction between the first pattern t1 and the third pattern t3.

[0088] In some embodiments, the first recognition pattern is also used as the recognition mark of the first pattern t1, and the second recognition pattern is used as the recognition mark of the third pattern t3. In this way, the first pattern t1 and the third pattern t3 can be distinguished by the first recognition pattern and the second recognition pattern, thereby avoiding recognition errors.

[0089] For example, the first recognition pattern segment may be n consecutive identical feature bodies a1, where n is greater than 0, such as three consecutive circles; the second recognition pattern segment may be m consecutive identical feature bodies a1, where m is greater than 0, such as three consecutive triangles.

[0090] It should be understood that the feature body a1 refers to an object with a three-dimensional structure.

[0091] Optionally, any feature a1 has a shape and a thickness, wherein the shape is the shape of the feature a1 in the orthographic projection pattern of the touch screen 20, and the thickness is the thickness value in the orthographic projection direction of the touch screen 20. At least one of the shape and the thickness value is different in two different feature a1s.

[0092] Each of the first pattern t1 and the third pattern t3 includes at least one of a pattern formed by arranging features a1 of different shapes and a pattern formed by arranging features a1 of different thicknesses. The second pattern t2 includes at least one arrangement of features a1.

[0093] Correspondingly, the pattern formed by the arrangement of the characteristic bodies a1 of different shapes is configured to be captured by the camera and form an image. The pattern formed by the arrangement of the characteristic bodies a1 of different thicknesses is configured to be captured by the ultrasonic probe and form an image.

[0094] Optionally, the recognition module of the active pen 10 includes at least one of a camera 11 and an ultrasonic probe 12. The camera 11 is used to acquire images of a pattern formed by an arrangement of feature bodies a1 of different shapes. The ultrasonic probe 12 is used to acquire images of a pattern formed by an arrangement of feature bodies a1 of different thicknesses.

[0095] It should be understood that, for the same first pattern t1 or second pattern t2 , the image acquired by the camera 11 is different from the image acquired by the ultrasonic probe 12 , but the same information can be obtained after the two images are interpreted.

[0096] In other words, the present application can adopt either of the two image acquisition methods to realize the interpretation of pattern information.

[0097] In one embodiment, the active pen 10 may use the two aforementioned image acquisition methods to simultaneously acquire images of the pattern layer 22 to improve the accuracy of the first coordinate information.

[0098] It should be understood that when determining coordinate information, the active pen 10 must be used to capture multiple images of the same minimum unit 2a. Multiple coordinate information is then obtained based on the interpretation of these multiple images. The most accurate coordinate information can be obtained based on these multiple coordinate information, such as by taking the average of the multiple coordinate information as the first coordinate information for the minimum unit 2a. Simultaneously capturing images using two image acquisition methods can yield two coordinate information sets at once. Therefore, using both the camera 11 and the ultrasonic probe 12 simultaneously to obtain the first coordinate information for the minimum unit 2a, given the same number of acquisitions, provides more accurate first coordinate information for the minimum unit 2a.

[0099] Optionally, the camera 11 may be an infrared camera.

[0100] Optionally, in one embodiment, the first pattern t1 and the third pattern t3 are both patterns formed by arranging at least two different features a1 in a number system, the number of features a1 is a number base, and one feature a1 is a number.

[0101] Among them, the numerical method is a relatively simple method, which is convenient for simplifying the pattern. Of course, in some embodiments, other setting methods can also be used as long as the corresponding coordinate information can be obtained.

[0102] Optionally, the first pattern t1 and the third pattern t3 each have at least two rows, and at least one row of sub-patterns of feature bodies a1 can be identified and interpreted as abscissas, and at least one row of sub-patterns of feature bodies a2 can be identified and interpreted as ordinates.

[0103] For example, the first pattern t1 has four rows, the sub-patterns arranged in the first and second rows correspond to a horizontal coordinate value, and the sub-patterns arranged in the third and fourth rows correspond to a vertical coordinate value.

[0104] The number of the feature bodies a1 can be adjusted according to actual conditions. For example, one horizontal / vertical coordinate value can correspond to 4 bits, 6 bits, 8 bits, 10 bits, 12 bits, 14 bits, or 16 bits.

[0105] Optionally, in one embodiment, the number system is binary. The at least two different features a1 include a first feature a11 and a second feature a12. The shape of the first feature a11 is different from the shape of the second feature a12. The thickness of the first feature a11 is different from the thickness of the second feature a12. The first feature a11 serves as a digital 0. The second feature a12 serves as a digital 1.

[0106] That is, the first pattern t1 and the third pattern t3 are both formed by arranging two different features a1 (the first features a11 and the second features a12 ).

[0107] The binary method is used to form a simple first pattern t1 and a simple third pattern t3, thereby avoiding pattern complexity and improving recognition efficiency.

[0108] In some embodiments, the first pattern t1 and the third pattern t3 may use the same number system or different number systems. For example, the first pattern t1 and the third pattern t3 may each use ternary, quaternary, hexadecimal, octal or decimal systems.

[0109] Optionally, the shape of the feature body a1 includes but is not limited to a circle, an ellipse, and a polygon. The thickness of the first feature body a11 is 1 / 2 of the thickness of the second feature body a12.

[0110] For example, the first feature a11 is circular and has a thickness of h / 2. The second feature a12 is square and has a thickness of h. Therefore, the first feature a11, which is circular and has a thickness of h / 2, represents a binary "0," while the second feature a12, which is square and has a thickness of h, represents a binary "1." Therefore, by identifying and interpreting the binary code, coordinate information can be obtained.

[0111] Optionally, in one embodiment, the second pattern t2 is formed by the same type of feature bodies a1 arranged along the circumference of the minimum unit 2a. Such an arrangement can simplify the second pattern t2 and improve the recognition effect.

[0112] For example, the second pattern t2 may be formed by arranging a circle of circular first feature bodies a11.

[0113] Optionally, referring to FIG. 3 , in one embodiment, the touch screen 20 includes a central region z1 and an edge region z2 surrounding the central region z1. The feature a1 includes a first intermediate feature a1a, a second intermediate feature a1b, a first edge feature a2a, and a second edge feature a2b. The first intermediate feature a1a and the second intermediate feature a1b are located in the central region z1. The first edge feature a2a and the second edge feature a2b are located in the edge region z2.

[0114] The thickness of the second intermediate feature a1b is n times the thickness of the first intermediate feature a1a, the thickness of the second edge feature a2b is n times the thickness of the first edge feature a2a, the thickness of the second intermediate feature a1b is greater than the thickness of the second edge feature a2b, and n is greater than 1. For example, n can be 2, 2.5, 3, 3.5, 4, 4.5, 5, or 6.

[0115] It can be understood that, in the touch screen 20, the middle area z1 of the touch screen 20 is touched more frequently than the edge area z1, and usually when the user performs a touch operation, the force applied to the middle area z1 is greater than the force applied to the edge area z2. Therefore, compared with the middle area z1, a thinner feature body a1 is set in the edge area z2, so that the touch efficiency of the edge area z2 can be close to that of the middle area z1, and the support and stress resistance performance of the entire touch screen 20 for the active pen 10 can be averaged.

[0116] Optionally, the thickness of the second intermediate feature a1b is n times the thickness of the second edge feature a2b, that is, the thickness of the first intermediate feature a1a is the same as the thickness of the second edge feature a2b, which can simplify the manufacturing process.

[0117] Referring to Figure 4 , in one embodiment, the touch screen 20 optionally further includes a substrate 23, a black matrix layer 24, and a color resist layer 25. The black matrix layer 24 is disposed on a side of the substrate 23 away from the touch surface of the touch screen 20. The black matrix layer 24 defines a plurality of openings k1. The color resists of the color resist layer 25 are disposed within the openings k1. The pattern layer 22 is disposed between the substrate 23 and the black matrix layer 24. In the orthographic projection pattern of the touch screen 20, the pattern layer 22 overlaps the black matrix layer 24, and the features a1 are all located on the periphery of the color resists.

[0118] The base plate 23 is located on a side close to the user operation surface.

[0119] The pattern layer 22 is stacked on the black matrix layer 24 to prevent the pattern layer 22 from affecting light emission, thereby preventing light loss, and does not affect the aperture ratio of the touch screen 20 .

[0120] Optionally, the color resist includes red color resist, blue color resist and green color resist.

[0121] Optionally, the touch screen 20 is a liquid crystal screen, and the touch screen 20 includes a color filter substrate 20a and an array substrate 20b that are arranged opposite and spaced apart. The substrate 23, black matrix layer 24, color resist layer 25, and pattern layer 22 are integrated into the color filter substrate 20a, and the touch structure layer 21 is integrated into the array substrate 20b or on the side of the color filter substrate 20a that is closest to the array substrate 20b.

[0122] Optionally, the thickness of the color resist layer 25 is greater than the sum of the thicknesses of the black matrix layer 24 and the pattern layer 22. The greater thickness of the color resist layer 25 can improve the purity of the light emitted by the touch screen 20 and reduce the risk of stray light interference.

[0123] Optionally, the material of the black matrix layer 24 has leveling properties. Since the feature bodies a1 have different thicknesses, the black matrix layer 24 also has different thicknesses in regions corresponding to the feature bodies a1 of different thicknesses.

[0124] The black matrix layer 24 is formed of a material with leveling properties, so that the black matrix layer 24 covers the pattern layer 22 , and also reduces the risk of the black matrix layer 24 being easily broken due to the feature bodies a1 with height differences.

[0125] In addition, when the material of the pattern layer 22 is transparent metal oxide, the pattern layer 22 is stacked on the black matrix layer 24, so that the pattern layer 22 and the common electrode layer and pixel electrode of the touch screen 20 are at a greater distance, avoiding interference of the common electrode layer and pixel electrode on the pattern layer 22, thereby improving the accuracy and clarity of the image of the pattern layer 22 obtained by the active pen 10.

[0126] Optionally, the color filter substrate 20 a further includes a planar layer 26 covering the color resist layer 25 and the black matrix layer 24 .

[0127] In another embodiment, the touch screen 20 is an OLED display screen. A touch structure layer 21 is formed on the encapsulation layer. A color resist layer 25 and a black matrix layer 24 are formed on the touch structure layer 21. The substrate 23 is a cover plate.

[0128] It is understandable that integrating the pattern layer 22 into the touch screen 20 can make the touch screen 20 thinner, and compared with an external attachment method, the pattern layer 22 can be formed with better precision.

[0129] Optionally, the material of the pattern layer 22 can be a transparent or opaque material, such as indium tin oxide, a photoresist material, etc. Furthermore, since the pattern layer 22 is formed on the black matrix layer 24, the material of the pattern layer 22 is a white material, such as a photoresist material, which can facilitate the identification of the shape of the feature a1.

[0130] 5 and 6 , in one embodiment of the present application, the touch screen 20 further includes a display panel pn, a polarizer pol, and a cover plate cg stacked in sequence, and the pattern layer 22 is disposed between the cover plate cg and the polarizer pol.

[0131] In one embodiment, as shown in FIG. 7 , the pattern layer 22 is disposed on a side of the cover plate cg away from the polarizer pol.

[0132] The touch structure layer 21 is integrated into the display panel pn, and the pattern layer 22 can be formed on the cover plate cg or the polarizer pol.

[0133] Optionally, the material of the pattern layer 22 is a transparent material, such as indium tin oxide and a photoresist material, etc. Such a configuration avoids a low light extraction rate of the touch screen 20 .

[0134] Optionally, the pattern layer 22 is arranged between the cover plate CG and the polarizer Pol or on the side of the cover plate CG away from the polarizer Pol, so that the pattern layer 22 is closer to the touch surface of the touch screen 20, and the pattern layer 22 is easier to be acquired by the active pen 10, and a clearer image is obtained.

[0135] Optionally, in one embodiment, the display panel pn includes a color filter substrate 20a and an array substrate 20b disposed opposite and spaced apart from each other. The color filter substrate 20a includes a substrate 23 and a color filter layer cf, with the color filter layer cf disposed on a side of the substrate 23 closer to the array substrate 20b. The polarizer pol is disposed on a side of the substrate 23 farther from the array substrate 20b.

[0136] The material of the pattern layer 22 includes transparent metal oxide. The display panel pn also includes a transparent common electrode layer com configured to drive liquid crystal deflection. The common electrode layer com is arranged on a side of the color filter layer cf away from the pattern layer 22.

[0137] The transparent metal oxide includes indium tin oxide, indium zinc oxide or other metal oxides. It is understood that transparent metal oxides have a good reflective effect on infrared light, especially indium tin oxide, so that the active pen 10 can obtain a clearer image.

[0138] In addition, the common electrode layer com is arranged on the side of the color filter layer cf away from the pattern layer 22, so that the pattern layer 22 is respectively far away from the common electrode layer com and the pixel electrode, thereby reducing the interference of the common electrode layer com and the pixel electrode on the pattern layer 22, thereby improving the accuracy and clarity of the image of the pattern layer 22 obtained by the active pen 10.

[0139] Optionally, the common electrode layer com may be integrated on the color filter substrate 20a side or on the array substrate 20b side.

[0140] Optionally, the feature a1 in the pattern layer 22 can be reused as an optical microstructure to achieve a light-collecting effect, thereby increasing the brightness of light emitted from the display panel pn at a normal viewing angle.

[0141] In addition, due to the accuracy of the cover plate cg / polarizer pol attachment, the pattern layer 22 will be offset from the position of the pixel, as shown in Figure 8. This application uses an image calibration method to correct this deviation. As shown in Figure 8, the coordinate system on the cover plate cg / polarizer pol is (x3, y3), and the pixel coordinate system is (x4, y4). After the module is produced, it is photographed with a high-precision camera. By taking V points on the panel, where V is greater than 1, the coordinate values ​​of each point in the two coordinate systems are obtained. Taking point A as an example, the coordinates (x a3 ,y a3 ) and (x a4 ,y a3 ).x a3 =x a4 *(1-cosθ);y a3 =y a3 *(1-sinθ).

[0142] Therefore,

[0143] The cosθ and sinθ values ​​corresponding to V points can be taken, and the average of cosθ and sinθ can be calculated. This average of cosθ and sinθ can be used as a correction coefficient. When the active stylus 10 obtains the coordinate information of the pattern layer 22, it can be combined with the correction coefficient to obtain more accurate first coordinate information.

[0144] Optionally, the correction coefficient value may be stored in the controller or in other devices.

[0145] Accordingly, an embodiment of the present application further provides a touch control method for a touch display device. The touch display device 100 includes a touch screen 20. The touch screen 20 includes a touch structure layer 21 and a pattern layer 22. The touch structure layer 21 includes a plurality of touch electrodes 211. The pattern layer 22 is disposed on the touch structure layer 21. The pattern layer 22 includes a plurality of minimum units 2a. In the orthographic projection pattern of the touch screen 20, a plurality of minimum units 2a arranged in an array are stacked on a touch electrode 211. The minimum units 2a include at least two different features a1, and the at least two different features a1 are arranged to form a first pattern t1.

[0146] The structure of the touch display device of this embodiment is similar to or the same as the structure of the touch display device 100 of the above embodiments, and thus will not be described in detail here.

[0147] The touch control method of the touch display device includes the following steps:

[0148] Step B1, receiving first coordinate information of the active pen touch point, wherein the first coordinate information is obtained after the first pattern t1 is recognized and processed by the external active pen 10;

[0149] Step B2, acquiring second coordinate information of the touch point of the active pen 10 according to the touch signal of the active pen 10 received by the touch electrode 211;

[0150] Step B3: obtaining the real-time coordinates of the touch point of the active pen 10 according to the first coordinate information and the second coordinate information.

[0151] The touch method of this embodiment is based on adding a pattern layer with multiple minimum units to the touch display device. There are multiple minimum units corresponding to one touch electrode, that is, the accuracy of the minimum unit is greater than the accuracy of the touch electrode. The active pen obtains the image of the minimum unit under the touch point, and then obtains the first coordinate information of the active pen touch point, and uses the first coordinate information to correct the second coordinate information, thereby improving the touch accuracy of the active pen touch point.

[0152] In step B1 , first coordinate information of a touch point of the active pen is received. The first coordinate information is obtained after a first pattern t1 is recognized and processed by the external active pen 10 .

[0153] That is, the recognition module of the active pen 10 obtains the image of the first pattern t1 and obtains first coordinate information of the touch point of the active pen 10 according to the image of the first pattern t1 , and sends the first coordinate information to the touch screen 20 .

[0154] The active pen 10 uses the camera 11 and / or ultrasonic probe 12 to capture an image of a first pattern t1 within the smallest unit 2a of the touch point area. The image of the first pattern t1 is set as a first image. Based on the captured first image, the first image is recognized and interpreted to obtain first coordinate information. The first coordinate information is then transmitted to a processing unit of the controller.

[0155] In step B2 , second coordinate information of the touch point of the active pen 10 is acquired according to the touch signal of the active pen 10 received by the touch electrode 211 , and the second coordinate information is sent to the processing unit of the controller.

[0156] Step B3: obtaining the real-time coordinates of the touch point of the active pen 10 according to the first coordinate information and the second coordinate information.

[0157] The processing unit of the controller obtains the real-time coordinates of the active pen touch based on the real-time coordinates (x0, y0)=a(x1, y1)+b(x2, y2) and in combination with the first coordinate information and the second coordinate information.

[0158] The above is a detailed introduction to a touch display device and a touch method thereof provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the idea of ​​the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A touch display device, comprising a touch screen, and the touch screen includes: A touch structure layer, and the touch structure layer includes a plurality of touch electrodes; A pattern layer, the pattern layer is disposed on the light-emitting side of the touch structure layer, and the pattern layer includes a plurality of minimum units; in the orthographic projection pattern of the touch screen, a region where one of the touch electrodes is located is correspondingly configured with a plurality of minimum units arranged in an array, and the minimum unit includes at least two different feature bodies, and at least two different feature bodies are arranged to form a first pattern; A controller, and the controller is electrically connected to the plurality of touch electrodes; Wherein, the feature body of the pattern layer is configured to be recognized by an external active pen, and the first pattern has position information.

2. The touch display device according to claim 1, wherein, In the active pen touch stage, the controller is configured to receive the first coordinate information obtained after the active pen recognizes the first pattern, and obtain the second coordinate information of the active pen contact point according to the touch signal of the active pen received by the touch electrode, and obtain the real-time coordinate of the active pen contact point according to the first coordinate information and the second coordinate information.

3. The touch display device according to claim 1, wherein, At least one of the feature bodies is arranged along the peripheral direction of the minimum unit to form a second pattern different from the first pattern, and the second pattern is used to define the range of the minimum unit, and the first pattern is arranged in the region surrounded by the second pattern.

4. The touch display device according to claim 3, wherein, At least two of the feature bodies are arranged to form a third pattern different from the second pattern, and the third pattern is arranged in the region surrounded by the second pattern and on one side of the first pattern, and the third pattern has the position information.

5. The touch display device according to claim 4, wherein, Any of the feature bodies has a shape and a thickness, the shape is the shape of the feature body in the orthographic projection pattern of the touch screen, and the thickness is the thickness value in the orthographic projection direction of the touch screen. Wherein, at least one of the shape and the thickness value is different between two different feature bodies; Any one of the first pattern and the third pattern includes at least one of a pattern formed by arranging feature bodies of different shapes and a pattern formed by arranging feature bodies of different thicknesses.

6. The touch display device according to claim 5, wherein, The pattern formed by arranging feature bodies of different shapes is configured to be acquired by a camera and form an image, and the pattern formed by arranging feature bodies of different thicknesses is configured to be acquired by an ultrasonic probe and form an image.

7. The touch display device according to claim 5, wherein, Both the first pattern and the third pattern are patterns formed by arranging at least two different feature bodies in a number system manner, the number of types of feature bodies is the radix, and one type of feature body is one digit.

8. The touch display device according to claim 7, wherein, The number system is binary, at least two different feature bodies include a first feature body and a second feature body, the shape of the first feature body is different from the shape of the second feature body, the thickness of the first feature body is different from the thickness of the second feature body, the first feature body is used as digit 0, and the second feature body is used as digit 1.

9. The touch display device according to claim 8, wherein, The shape includes a circle, an ellipse and a polygon, and the thickness of the first feature body is 1 / 2 of the thickness of the second feature body.

10. The touch display device according to claim 5, wherein, The touch screen includes an intermediate region and a peripheral region surrounding the intermediate region. The feature body includes a first intermediate feature body, a second intermediate feature body, a first peripheral feature body, and a second peripheral feature body. The first intermediate feature body and the second intermediate feature body are located in the intermediate region, and the first peripheral feature body and the second peripheral feature body are located in the peripheral region; The thickness of the second intermediate feature body is n times the thickness of the first feature body, the thickness of the second peripheral feature body is n times the thickness of the first peripheral feature body, the thickness of the second intermediate feature body is greater than the thickness of the second peripheral feature body, and n is greater than 1.

11. The touch display device according to claim 5, wherein, The second pattern is formed by arranging the same kind of the feature body along the peripheral direction of the minimum unit.

12. The touch display device according to claim 1, wherein, The touch screen further includes a substrate, a black matrix layer, and a color resist layer. The black matrix layer is disposed on a side of the substrate away from the touch surface of the touch screen. A plurality of openings are formed in the black matrix layer, and the color resist of the color resist layer is disposed in the openings. The pattern layer is disposed between the substrate and the black matrix layer. In the orthographic projection pattern of the touch screen, the pattern layer and the black matrix layer are overlapped, and the feature bodies are all located outside the color resist; The substrate, the black matrix layer, and the color resist layer are all located on the light-emitting side of the touch control structure layer.

13. The touch display device according to claim 12, wherein, The touch screen further includes a color filter substrate and an array substrate that are opposite and spaced apart. The substrate, the black matrix layer, the color resist layer, and the pattern layer are integrated on the color filter substrate, and the touch control structure layer is integrated on the array substrate.

14. The touch display device according to claim 13, wherein, The thickness of the color resist layer is greater than the sum of the thicknesses of the black matrix layer and the pattern layer.

15. The touch display device according to claim 1, wherein, The touch screen further includes a display panel, a polarizer, and a cover plate that are sequentially stacked. The pattern layer is disposed between the cover plate and the polarizer or on a side of the cover plate away from the polarizer.

16. The touch display device according to claim 15, wherein, The display panel includes a color filter substrate and an array substrate that are opposite and spaced apart. The color filter substrate includes a substrate and a color filter layer. The color filter layer is disposed on a side of the substrate close to the array substrate, and the polarizer is disposed on a side of the substrate away from the array substrate; The material of the pattern layer includes a transparent metal oxide. The display panel further includes a transparent common electrode layer configured to drive the liquid crystal to deflect. The common electrode layer is disposed on a side of the color filter layer away from the pattern layer.

17. The touch display device according to claim 15, wherein, The first coordinate information is (x1, y1), the second coordinate information is (x2, y2), and the real-time coordinate is (x0, y0); Wherein, the real-time coordinate (x0, y0) = a(x1, y1) + b(x2, y2), 0 < a < 1, 0 < b < 1, and a + b = 1.

18. The touch display device according to claim 15, wherein, a > b.

19. A touch control method for a touch display device, the touch display device comprising a touch screen, wherein, The touch screen includes a touch control structure layer and a pattern layer. The touch control structure layer includes a plurality of touch electrodes, and the pattern layer is disposed on the touch control structure layer. The pattern layer includes a plurality of minimum units. In the orthographic projection pattern of the touch screen, a plurality of the minimum units arranged in an array are stacked on one touch electrode. The minimum unit includes at least two different feature bodies, and at least two different feature bodies are arranged to form a first pattern. The touch control method of the touch display device includes the following steps: Receiving first coordinate information of the active pen contact point, where the first coordinate information is obtained after being recognized and processed by the first pattern by an external active pen. Obtaining second coordinate information of the active pen contact point according to the touch signal of the active pen received by the touch electrode. Obtaining the real-time coordinate of the active pen contact point according to the first coordinate information and the second coordinate information.

20. The touch method of the touch display device according to claim 19, wherein, At least one of the feature bodies is arranged along the peripheral direction of the minimum unit to form a second pattern different from the first pattern. The second pattern is used to define the range of the minimum unit, and the first pattern is disposed within the area enclosed by the second pattern.

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