Structure for improving pressure sensing effect of touch pen, touch pen and touch equipment

Abstract

The utility model discloses a structure for improving the pressure sensing effect of a touch pen, the touch pen and touch control equipment, relates to the technical field of touch pens, and solves the technical problems that the pressure sensing sensitivity of each channel of a capacitive pressure sensing touch pen is low, and the pressure detection effect is not obvious. The pattern comprises a back pattern, the back pattern is an induction block array formed by a plurality of induction block patterns, induction blocks in the induction block array are the same in size and are evenly distributed, and the line number of the induction block array does not exceed three. According to the utility model, when a hand holds the touch pen, the contact area on the same channel is larger than that in the prior art, the capacitance value variation of the capacitance sensor is larger, the chip acquisition and detection are more sensitive, and the pressure detection effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of touch pens, and in particular to a structure for improving the pressure-sensing effect of a touch pen, a touch pen, and a touch control device. Background Art

[0002] Currently, capacitive pressure-sensitive styluses are used to replace direct finger contact with the screen. They are widely used in electronic devices such as capacitive screen phones, tablets, and touch-screen laptops, enabling functions such as handwriting input and drawing signatures. A pressure-sensitive stylus is a writing tool that can sense the pressure of the user's finger and convert it into an electrical signal. It works by sensing the user's pressure through an internal pressure sensor, typically a capacitive sensor. Capacitive sensors sense pressure by changes in capacitance. When the user touches the screen with the stylus tip, the capacitance changes, which is converted into an electrical signal.

[0003] The operating principle of a capacitive sensor primarily relies on changes in capacitance. When a user's finger grips a pen, a capacitor is formed between the finger and the working surface. The size of this capacitance is affected by multiple factors, including finger pressure and contact area. Specifically, as finger pressure increases, the distance between the finger and the interlayer working surface of the screen decreases, and the capacitance increases. Simultaneously, as the contact area between the finger and the screen increases, the capacitance also increases. Therefore, the effectiveness of a capacitive sensor is related to the contact surface between the finger and the same channel. Changes in the contact surface directly affect the size of the capacitance, which in turn affects the response of the capacitive sensor.

[0004] In the existing pressure-sensitive touch pen pattern design, the number of channels is determined by the size of the touch pen's touch area to determine the number of channels on the front and back sides. Capacitive sensor patterns are generally based on square patterns. For example, the front finger detection uses 36 channels and the back pressure detection uses 12 channels. Figure 1 As shown, the front pattern uses 6 rows and 6 columns to form 36 square patterns, which means 36 sensing channels are used. The front pattern is used to detect the user receiving tactile input in the natural grip position, such as double-click and single-click functions of the finger. Figure 2 As shown, the back pressure detection pattern is a pattern that detects the user's pressure sensitivity. The sensor is rolled up and placed in the pen holder. The back pressure detection pattern uses 12 channels, 6 rows and 2 columns to form a 12 square pattern to detect pressure. The position where the user holds the finger is the sensing area formed by the distribution of six sensing channels.

[0005] The user grips the stylus with the tips of their thumb and index finger. The tip of the thumb is approximately 6-10mm wide and 8-12mm long, and the tip of the index finger is approximately 6-10mm wide and 8-12mm long. The pressure sensor grip is composed of six square patterns, each 3.5mm wide and 24.7mm long. When pinching the stylus with both hands, pressure is applied to at least four of the channel square patterns. Therefore, one finger lands on two channel square patterns, affecting an area of ​​approximately 80 square millimeters. The area of ​​each channel is approximately 80 / 2, or 40 square millimeters. The distance between the pressure-sensing channel and the metal cylinder of the stylus is also approximately 0.15mm, with a foam dielectric in between. As shown in Table 1, the coupling capacitance is approximately 5.487pF. If the barrel deformation caused by pinching the stylus is 1nm (0.001mm), as shown in Table 2, the coupling capacitance is approximately 5.524pF. The capacitance change is 5.524-5.487=0.037pF.

[0006] Table 1 Calculation results of capacitance of touch pen before touch in prior art

[0007]

[0008] Table 2 Calculation results of capacitance of touch pen after touch in prior art

[0009]

[0010] Judging by the area of ​​the user's finger grip, when the user's finger grips, it will fall on the pattern of at least four sensing channels. The contact area of ​​each channel is approximately 3.5*10 square millimeters. The change in the capacitance sensor is small, so the capacitance change of each channel is very weak. The pressure sensing sensitivity is low and the detection effect is not obvious. A new pressure touch sensor pattern design is urgently needed.

[0011] In the process of implementing the present invention, the applicant discovered that the prior art has at least the following problems:

[0012] In the pressure detection pattern on the back of the capacitive pressure-sensitive touch pen, the pressure sensing sensitivity of each channel is low, and the pressure detection effect is not obvious. Utility Model Content

[0013] The present invention aims to provide a structure, touch pen, and touch device that enhance the pressure-sensing effect of a touch pen, thereby resolving the technical problem of low pressure sensitivity per channel in the pressure detection pattern on the back surface of a capacitive pressure-sensitive touch pen, resulting in poor pressure detection. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0014] To achieve the above objectives, the present invention provides the following technical solutions:

[0015] The present invention provides a structure for improving the pressure sensitivity of a touch pen, comprising a back pattern. The back pattern is a sensing block array formed by a plurality of sensing blocks. The sensing blocks in the sensing block array are of the same size and are evenly distributed, and the number of rows in the sensing block array does not exceed 3.

[0016] Preferably, the number of sensing blocks in the sensing block array is 12.

[0017] Preferably, the sensing block array has a 2-row 6-column structure.

[0018] Preferably, the size of the sensing block is 10.85mm*8.1mm.

[0019] Preferably, the sensing block array has a 1-row and 12-column structure.

[0020] Preferably, the size of the sensing block is 21.9mm*3.95mm.

[0021] Preferably, the sensing block array has a 3-row 4-column structure.

[0022] Preferably, the size of the sensing block is 7.2mm*12.25mm.

[0023] A touch pen comprises any of the above structures for improving the pressure sensitivity of the touch pen.

[0024] A touch device includes the touch pen.

[0025] Implementing one of the above technical solutions of the utility model has the following advantages or beneficial effects:

[0026] In this application, the number of rows of the sensing block array does not exceed 3 rows. At this time, when using a touch pen, one finger will fall on one channel block pattern, and the effective area is approximately 80 square millimeters. In this way, when the hand holds the touch pen, the contact area on the same channel is larger than the existing technology, the capacitance value change of the capacitive sensor is larger, the chip acquisition detection is more sensitive, and the pressure detection effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0028] Figure 1 Schematic diagram of the front pattern of a touch pen in the prior art;

[0029] Figure 2 This is a schematic diagram of the back pattern of a touch pen in the prior art;

[0030] Figure 3 This is a schematic diagram of a pattern for improving the pressure sensitivity of a touch pen in the first embodiment of the present invention. Figure 1 ;

[0031] Figure 4 This is a schematic diagram of a pattern for improving the pressure sensitivity of a touch pen in the first embodiment of the present invention. Figure 2 ;

[0032] Figure 5 This is a schematic diagram of a pattern for improving the pressure sensitivity of a touch pen in the first embodiment of the present invention. Figure 3 . DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the various exemplary embodiments to be described below will refer to the corresponding drawings, which constitute a part of the exemplary embodiments, in which various exemplary embodiments that may be used to implement the present invention are described. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following exemplary embodiments do not represent all implementation methods consistent with the present disclosure. It should be understood that they are only examples of processes, methods and devices that are consistent with some aspects of the present disclosure as detailed in the appended claims, and other embodiments may also be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and essence of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", etc. indicate the orientation or position relationship based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation, be constructed and operate in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium, and can be the internal connection of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below, in which only the parts related to the embodiment of the present invention are shown.

[0036] Example 1:

[0037] like Figure 3-Figure 5 As shown, the present invention provides a structure that enhances the pressure sensitivity of a stylus pen, including a back pattern. The back pattern is a sensing square array formed by multiple sensing squares. The distribution of the sensing square array ensures the touch effect of the stylus pen. The sensing squares in the sensing square array are of the same size and evenly distributed. The same size of the sensing squares facilitates manufacturing, and the even distribution of the sensing squares facilitates obtaining more accurate and continuous capacitance change values, which provides a better user experience for the stylus pen. The number of rows in the sensing square array does not exceed 3, and the number of columns can be set according to the length of the stylus pen's sensing area, such as 1 column, 2 columns, 3 columns, etc. When the number of rows in the sensing square array does not exceed 3, a finger using the stylus pen will land on one channel square pattern, with an active area of ​​approximately 80 square millimeters. In this way, when holding the stylus pen, the contact area on the same channel is larger than that of the prior art, resulting in a larger capacitance change in the capacitive sensor, more sensitive chip acquisition and detection, and better pressure detection.

[0038] As an optional implementation, the number of sensing blocks in the sensing block array is 12. These 12 sensing blocks form 12 sensing channels, consistent with the number of sensing channels in the prior art. This significantly reduces the overall sensing area and reduces the cost of modifying the stylus. Furthermore, the 12 sensing blocks also facilitate splitting into different-sized sensing block combinations.

[0039] As an optional implementation, Figure 3 As shown, the sensing square array is structured in two rows and six columns. The sensing square measures 10.85mm by 8.1mm, meaning its long side is 10.85mm and its short side is 8.1mm. When using a stylus, a finger rests on one channel square pattern, covering an active area of ​​approximately 80 square millimeters. This allows for a greater contact area on a single channel than with existing technologies, resulting in greater capacitance sensor capacitance variation and more sensitive chip acquisition and detection.

[0040] As an optional implementation, Figure 4 As shown, the sensing square array has a 1-row, 12-column structure. The sensing square measures 21.9mm by 3.95mm, meaning its long side is 21.9mm and its short side is 3.95mm. When using a stylus, a finger rests on one channel square pattern, covering an active area of ​​approximately 80 square millimeters. This allows for a greater contact area on a single channel than with existing technologies, resulting in greater capacitance sensor capacitance variation and more sensitive chip acquisition and detection.

[0041] As an optional implementation, Figure 5 As shown, the sensing square array is structured in 3 rows and 4 columns. The sensing square measures 7.2mm by 12.25mm, meaning the long side is 12.25mm and the short side is 7.2mm. When using a stylus, a finger rests on one channel square pattern, covering an active area of ​​approximately 80 square millimeters. This allows a larger contact area on a single channel when holding the stylus than with existing technologies, resulting in greater capacitance sensor capacitance variation and more sensitive chip acquisition and detection.

[0042] In this embodiment, according to Figure 3-Figure 5 Judging by the size of the user's finger when pinching, it can be seen that all three sensing square array structures act on two channels. The finger's grip only occupies two sensing channels. A finger is approximately 8mm wide and 10mm long, and will land on one channel square pattern, affecting an area of ​​approximately 80 square millimeters. The distance between the pressure sensing channel and the metal cylinder of the stylus is also approximately 0.15mm, with a foam dielectric in between. As shown in Table 3, the coupling capacitance is approximately 12.055pF. If the pen barrel deformation caused by pinching the pen is 1nm (0.001mm), as shown in Table 4, the coupling capacitance is approximately 12.136pF. The capacitance change is 12.136-12.055 = 0.081pF. Obviously, the larger the active area, the greater the capacitance change. The more the user applies pressure to the same channel area, the greater the capacitance change, the higher the pressure sensing sensitivity of each channel, and the more effective the pressure detection and acquisition effect.

[0043] Table 3 Calculation results of capacitance of the touch pen before touch in the second embodiment of the present invention

[0044]

[0045] Table 4 Calculation results of capacitance of the touch pen after touch in the second embodiment of the present invention

[0046]

[0047] The embodiment is only a special example and does not indicate that the present invention is implemented in such a way.

[0048] Example 2:

[0049] A touch pen includes a structure for enhancing the pressure sensitivity of the touch pen according to the first embodiment. When the number of rows of the sensing square array on the back of the touch pen does not exceed three, a finger using the touch pen will rest on one channel square pattern, with an active area of ​​approximately 80 square millimeters. This allows a larger contact area on the same channel when the touch pen is held, resulting in a greater capacitance sensor capacitance change, more sensitive chip acquisition and detection, and better pressure detection.

[0050] Example 3:

[0051] A touch device includes the touch pen of embodiment 2. When the touch pen of embodiment 2 is used, the chip acquisition and detection of the touch pen is more sensitive and the pressure detection effect is better, thereby improving the user experience of the touch device.

[0052] The above description is merely a preferred embodiment of the present invention. Those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A structure for improving the pressure sensitivity of a touch pen, characterized in that: The back pattern includes a sensing block array formed by a plurality of sensing blocks. The sensing blocks in the sensing block array are of the same size and are evenly distributed. The number of rows in the sensing block array does not exceed 3.

2. The structure for improving the pressure sensitivity of a touch pen according to claim 1, characterized in that: The number of sensing blocks in the sensing block array is 12.

3. The structure for improving the pressure sensitivity of a touch pen according to claim 1, characterized in that: The sensor block array has a 2-row and 6-column structure.

4. The structure for improving the pressure sensitivity of a touch pen according to claim 3, characterized in that: The size of the sensing block is 10.85mm*8.1mm.

5. The structure for improving the pressure sensitivity of a touch pen according to claim 1, characterized in that: The sensor block array has a 1-row and 12-column structure.

6. The structure for improving the pressure sensitivity of a touch pen according to claim 5, characterized in that: The size of the sensing block is 21.9mm*3.95mm.

7. The structure for improving the pressure sensitivity of a touch pen according to claim 1, characterized in that: The sensor block array has a 3-row 4-column structure.

8. The structure for improving the pressure sensitivity of a touch pen according to claim 7, characterized in that: The size of the sensing block is 7.2mm*12.25mm.

9. A touch pen, characterized in that: The invention comprises a structure for improving the pressure sensitivity of a touch pen as described in any one of claims 1-8.

10. A touch device, characterized in that: The invention comprises the touch pen described in claim 9.

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