Touch screen with touch vibration feedback

Abstract

The utility model relates to the technical field of touch vibration feedback, and discloses a touch screen with touch vibration feedback, which comprises a touch sensing layer used for detecting coordinates and pressure values of touch points; piezoelectric ceramic pieces are arranged in the display layer in a matrix manner; a processing chip and a driving unit are arranged in the control layer. According to the utility model, the piezoelectric ceramic piece has the characteristic of quick response, can quickly generate vibration feedback and improve the user experience, hardly consumes energy when not being stressed, only consumes a small amount of electric energy when vibration feedback is needed, has the advantages of energy conservation and high efficiency, and is uniform in area distribution of vibration feedback; the piezoelectric vibration layer is composed of piezoelectric ceramic pieces arranged in a matrix mode, the piezoelectric ceramic pieces are connected through a flexible circuit, accurate local vibration is achieved, the piezoelectric ceramic pieces and related circuits are simple in structure and can be easily integrated into an existing touch screen, and the thickness and the weight of equipment are not increased.

Description

Technical Field

[0001] This utility model relates to the field of touch vibration feedback technology, and in particular to a touch screen with touch vibration feedback. Background Technology

[0002] With the widespread use of electronic devices, touchscreens have become an indispensable interaction method in people's daily lives. However, traditional touchscreens only respond to user operations through visual feedback, lacking tactile feedback. This makes it difficult for users to obtain an intuitive tactile experience during operation, easily leading to misoperations, and causing user fatigue after prolonged use.

[0003] Existing vibration feedback technologies, such as linear motors, suffer from problems such as high response delay, ambiguous vibration area positioning, and high power consumption. Furthermore, external vibration motors are bulky, making them difficult to integrate with ultra-thin touchscreens, and they cannot achieve precise local feedback. Therefore, the market needs a touchscreen with touch vibration feedback to solve these problems. Utility Model Content

[0004] As mentioned in the background section, in order to overcome the problems of high response delay, ambiguous vibration area positioning, and high power consumption of linear motors, as well as the large size of external vibration motors, which makes them difficult to integrate with ultra-thin touch screens and cannot achieve precise local feedback, related technologies have adopted a measure of independently controlling the vibration feedback area using matrix-arranged micro piezoelectric ceramic sheets. Through precise vibration feedback, users can obtain more intuitive tactile cues during operation, which significantly improves the accuracy of operation, especially in noisy environments or when visibility is limited.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a touchscreen with touch vibration feedback, characterized in that it comprises:

[0006] A touch-sensing layer, which is used to detect the coordinates of the touch point and the pressure value;

[0007] The display layer has piezoelectric ceramic sheets arranged in a matrix inside the display layer;

[0008] The control layer contains a processing chip and a driving unit.

[0009] The touch sensing layer is connected to the display layer, and the control layer is also connected to the display layer. When a user touches the screen, the touch sensing layer detects the coordinates of the touch point and the pressure value from the touch sensing layer. The piezoelectric ceramic sheet is driven to vibrate under the control of the control layer.

[0010] As a further description of the above technical solution:

[0011] The touch sensing layer contains multiple sets of touch sensors, which employ capacitive or resistive technology and are embedded in the touchscreen body.

[0012] As a further description of the above technical solution:

[0013] The display layer has a piezoelectric vibration layer inside, which is composed of piezoelectric ceramic sheets arranged in a matrix.

[0014] As a further description of the above technical solution:

[0015] The driving unit also includes a dynamic adjustment unit, which can linearly adjust the driving voltage of the piezoelectric ceramic sheet according to the touch pressure value from the touch sensing layer.

[0016] As a further description of the above technical solution:

[0017] The touchscreen with touch vibration feedback also includes a shielding layer, which is disposed between the display layer and the control layer. The shielding layer has a copper foil mesh structure and is spaced 0.1-0.3 mm apart from the piezoelectric vibration layer.

[0018] As a further description of the above technical solution:

[0019] A hydrophobic nano-coating is added between the touch sensing layer and the piezoelectric vibration layer.

[0020] As a further description of the above technical solution:

[0021] The size of a single piezoelectric ceramic sheet is ≤2×2mm, and they are connected by a flexible circuit.

[0022] As a further description of the above technical solution:

[0023] The piezoelectric ceramic sheet is connected to the driving circuit via silver paste wires, allowing the screen to bend.

[0024] This utility model has the following beneficial effects:

[0025] 1. In this utility model, the piezoelectric ceramic sheet has a fast response characteristic, which can quickly generate vibration feedback and improve the user experience. The piezoelectric ceramic sheet consumes almost no energy when it is not under force, and only consumes a small amount of electrical energy when vibration feedback is needed, which has the advantages of energy saving and high efficiency. The vibration feedback area is evenly distributed. The piezoelectric vibration layer is composed of piezoelectric ceramic sheets arranged in a matrix. The size of a single piezoelectric ceramic sheet is ≤2×2mm, and they are connected by flexible circuits to achieve precise local vibration. Moreover, the piezoelectric ceramic sheet and related circuit structure are simple and easy to integrate into existing touch screens without increasing the thickness and weight of the device.

[0026] 2. In this utility model, the precise vibration feedback formed by the touch sensing layer, the piezoelectric ceramic sheet and the control layer allows users to obtain more intuitive tactile cues during operation, especially in noisy environments or when visibility is limited, which significantly improves the accuracy of operation and makes the interaction between the device and the user more natural. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a touch screen with touch vibration feedback proposed in this utility model;

[0028] Figure 2 This is a flowchart illustrating a touchscreen with touch vibration feedback proposed in this utility model.

[0029] Legend:

[0030] 1. Touch sensing layer; 2. Display layer; 3. Piezoelectric ceramic sheet; 4. Shielding layer; 5. Control layer. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 One embodiment of this utility model provides: a touchscreen with touch vibration feedback, comprising:

[0033] Touch sensing layer 1 is used to detect the coordinates of the touch point and the pressure value.

[0034] Display layer 2, with piezoelectric ceramic sheets 3 arranged in a matrix inside display layer 2;

[0035] Control layer 5, which contains a processing chip and a driver unit;

[0036] The touch sensing layer 1 is connected to the display layer 2, and the control layer 5 is connected to the display layer 2. When the user touches the screen, the touch sensing layer 1 detects the coordinates of the touch point and the pressure value from the touch sensing layer 1. The piezoelectric ceramic sheet 3 is driven to vibrate under the control of the control layer 5.

[0037] In this embodiment, the piezoelectric ceramic sheet 3 has a fast response characteristic, enabling it to quickly generate vibration feedback and improve the user experience. The piezoelectric ceramic sheet 3 consumes almost no energy when not under stress, only a small amount of power when vibration feedback is needed, offering energy-saving and high-efficiency advantages. The vibration feedback area is evenly distributed. The piezoelectric vibration layer is composed of a matrix arrangement of piezoelectric ceramic sheets 3, with each sheet having a size ≤2×2mm. These sheets are connected via flexible circuitry to achieve precise local vibration. Furthermore, the piezoelectric ceramic sheet 3 and related circuitry have a simple structure, making them easy to integrate into existing touchscreens without increasing the device's thickness or weight.

[0038] When a user taps a screen icon:

[0039] The touch sensor detects the coordinates (x, y) and pressure value F within 5ms;

[0040] The control module calculates the target area (a circular area with a radius of 2mm centered at x and y) and applies a voltage V = 0.5F + 3 (V); the piezoelectric element in the target area generates a 150Hz vibration wave for 20ms.

[0041] Specifically, in the embodiments of this application, piezoelectric materials (such as lead zirconate titanate, PZT) generate electric charge (positive piezoelectric effect) when subjected to external force (pressure), and conversely, they generate deformation (inverse piezoelectric effect) when an electric field is applied.

[0042] Key parameters:

[0043] Response time: ≤5ms (far exceeding 30ms for traditional motors)

[0044] Drive voltage: 3~12V (low power consumption)

[0045] Vibration frequency: 50–300 Hz (can simulate various tactile sensations such as clicking and friction)

[0046] Advantages of miniature piezoelectric ceramic sheets (compared to traditional vibration motors)

[0047] characteristic Miniature piezoelectric ceramic sheet Traditional linear motor Response speed ≤5ms (near-instantaneous feedback) 30-50ms (significant delay) Positioning accuracy Supports 1x1mm level local vibration Vibrate only in full screen or large area volume Thickness < 0.5mm (can be embedded inside the screen) Requires independent installation; thickness > 2mm Power consumption The energy consumption for a single trigger is approximately 0.1 mJ. The energy consumption of a single vibration is approximately 1-3 mJ. life >1 million cycles (no mechanical wear) Approximately 500,000 cycles (mechanical mechanism aging).

[0048] The touchscreen with touch vibration feedback in this embodiment adjusts the driving voltage in real time based on the touch pressure (detected by changes in capacitance / resistance), for example:

[0049] Light touch (1N pressure) → 3V voltage → weak vibration;

[0050] Press hard (5N pressure) → 12V voltage → strong vibration.

[0051] Reference Figure 1In this embodiment, the touch sensing layer 1 is equipped with multiple sets of touch sensors, which adopt capacitive or resistive technology and are embedded in the touch screen body. The display layer 2 is equipped with a piezoelectric vibration layer, which is composed of piezoelectric ceramic sheets 3 arranged in a matrix. The driving unit also includes a dynamic adjustment unit, which can linearly adjust the driving voltage of the piezoelectric ceramic sheets 3 according to the touch pressure value from the touch sensing layer 1. The touch screen with touch vibration feedback also includes a shielding layer 4, which is located between the display layer 2 and the control layer 5. The shielding layer 4 is a copper foil mesh structure and is spaced 0.1-0.3mm apart from the piezoelectric vibration layer. A hydrophobic nano-coating is added between the touch sensing layer 1 and the piezoelectric vibration layer. The size of a single piezoelectric ceramic sheet 3 is ≤2×2mm and is connected by a flexible circuit. The piezoelectric ceramic sheet 3 is connected to the driving circuit through silver paste wires, allowing the screen to bend.

[0052] It should also be noted that the piezoelectric driving signal used in this embodiment may interfere with the touch sensor. This embodiment solves this problem by using the copper foil shielding layer in the shielding layer 4. The signal interference problem can also be solved by differential signal transmission.

[0053] In addition, a touchable Braille dot matrix is ​​dynamically generated using a micro piezoelectric ceramic sheet array.

[0054] The precise vibration feedback formed by the touch-sensing layer 1, the piezoelectric ceramic sheet 3, and the control layer 5 provides users with more intuitive tactile cues during operation, significantly improving operational accuracy, especially in noisy environments or when visibility is limited, making the interaction between the device and the user more natural.

[0055] See Figure 2 Based on the same inventive concept, this application also provides a method for using a touchscreen with touch vibration feedback, applied to the touchscreen with touch vibration feedback in the above embodiments, including the following steps:

[0056] S100: Touch sensor detects the user's touch point location and the force of the touch;

[0057] S200: The charge processing unit receives and amplifies the charge signal from the touch sensor and transmits it to the intelligent control unit;

[0058] S300: The intelligent control unit processes the signal through the processing chip and then transmits it to the drive unit.

[0059] S400: The drive unit dynamically adjusts the output signal voltage of the drive unit according to the received transmission signal, thereby controlling the vibration intensity and frequency of the piezoelectric ceramic sheet 3.

[0060] Working principle: When a user touches the screen, the touch sensor on the touch sensing layer 1 detects the touch position and force, generates a corresponding charge signal, and transmits the charge signal to the charge processing unit for processing and amplification before continuing to transmit it to the control layer 5. The processing chip in the intelligent control unit in the control layer 5 calculates the optimal vibration intensity and frequency according to preset rules and real-time detection data. The driving unit applies an AC voltage to the corresponding piezoelectric ceramic sheet 3, driving the piezoelectric ceramic sheet 3 to generate precise local vibration feedback. Moreover, the vibration intensity and frequency can be dynamically adjusted according to the touch force and scene.

[0061] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A touchscreen with touch vibration feedback, characterized in that, include: A touch sensing layer (1) is used to detect the coordinates of the touch point and the pressure value; Display layer (2), wherein piezoelectric ceramic sheets (3) are arranged in a matrix inside the display layer (2); The control layer (5) is internally provided with a processing chip and a driving unit; The touch sensing layer (1) is connected to the display layer (2), and the control layer (5) is connected to the display layer (2). When the user touches the screen, the touch sensing layer (1) detects the touch point coordinates and pressure values ​​from the touch sensing layer (1), and the piezoelectric ceramic sheet (3) is driven to vibrate under the control of the control layer (5).

2. A touchscreen with touch vibration feedback according to claim 1, characterized in that: The touch sensing layer (1) is provided with multiple sets of touch sensors, which adopt capacitive or resistive technology and are embedded in the touch screen body.

3. A touchscreen with touch vibration feedback according to claim 1, characterized in that: The display layer (2) has a piezoelectric vibration layer inside, which is composed of piezoelectric ceramic sheets (3) arranged in a matrix.

4. A touchscreen with touch vibration feedback according to claim 1, characterized in that: The driving unit also includes a dynamic adjustment unit, which can linearly adjust the driving voltage of the piezoelectric ceramic sheet (3) according to the touch pressure value from the touch sensing layer (1).

5. A touchscreen with touch vibration feedback according to claim 3, characterized in that: The touch screen with touch vibration feedback also includes a shielding layer (4), which is located between the display layer (2) and the control layer (5). The shielding layer (4) is a copper foil mesh structure and is spaced 0.1-0.3 mm apart from the piezoelectric vibration layer.

6. A touchscreen with touch vibration feedback according to claim 1, characterized in that: A hydrophobic nano-coating is added between the touch sensing layer (1) and the piezoelectric vibration layer.

7. A touchscreen with touch vibration feedback according to claim 1, characterized in that: The size of a single piezoelectric ceramic sheet (3) is ≤2×2mm, and they are connected by a flexible circuit.

8. A touchscreen with touch vibration feedback according to claim 1, characterized in that: The piezoelectric ceramic sheet (3) is connected to the driving circuit via silver paste wires, allowing the screen to bend.

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