High-sensitivity multi-point capacitive cell phone touch screen

Abstract

The application provides a high-sensitivity multi-point capacitive mobile phone touch screen, and belongs to the technical field of touch screens.The high-sensitivity multi-point capacitive mobile phone touch screen comprises a touch screen main body, a frame arranged on the lower side of the touch screen main body, a support frame fixedly arranged on the inner wall of the frame, and a bottom shell arranged on the lower side of the support frame and matched with the frame, wherein the top of the support frame is bonded with the bottom of the touch screen main body, and four fixing mechanisms are arranged for fixing the touch screen main body on the support frame.In the application, when the touch screen main body is bonded on the support frame, the touch screen main body can be fixed by using the multiple fixing mechanisms, so that the touch screen main body is not easy to fall off from the frame.By arranging the capacitive sensor array, the signal processing unit, the multi-point touch control algorithm unit, the touch screen driving unit and the self-adaptive adjustment unit, the sensitivity of the touch screen can be effectively improved, and the touch control is more accurate and smooth.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of touch screens, and particularly relates to a high-sensitivity multi-point capacitive mobile phone touch screen. BACKGROUND

[0002] The capacitive multi-point touch screen is actually a combination of the capacitive touch screen and the multi-point touch technology. It is a new technology of mobile phone touch screens and has been applied to many mobile phone products. The structure of the capacitive touch screen mainly comprises a transparent thin film conductor layer coated on a glass screen and a protective glass added outside the conductor layer. The double-glass design can completely protect the conductor layer and the inductor. The capacitive touch screen is provided with long electrodes on four edges of the touch screen, and a low-voltage alternating current field is formed in the conductor. When the touch screen is touched, a coupling capacitance is formed between the finger and the conductor layer due to the human body electric field, and the current emitted by the four edge electrodes will flow to the touch point, and the strength of the current is proportional to the distance from the finger to the electrode. The controller behind the touch screen can calculate the proportion and strength of the current to accurately calculate the position of the touch point. The double glass of the capacitive touch screen not only protects the conductor and the inductor, but also effectively prevents external environmental factors from affecting the touch screen. Even if the screen is contaminated, dusty or stained with oil, the capacitive touch screen can still accurately calculate the touch position. The capacitive touch screen is provided with a layer of transparent special metal conductive material on the glass surface. When the finger touches the metal layer, the capacitance of the touch point will change, causing the frequency of the connected oscillator to change. The touch position information can be determined by measuring the frequency change. Since the capacitance changes with temperature, humidity or grounding conditions, its stability is poor and often drifts. Multi-point touch, as the name implies, is to recognize the touch of two or more fingers. There are two kinds of multi-point touch technology: Multi-Touch Gesture and Multi-Touch All-Point. In simple terms, it is to recognize the direction of multi-point touch and the position of multi-point touch. The most common one we see is Multi-Touch Gesture, that is, when two fingers touch, the movement direction of the two fingers can be recognized, but the specific position cannot be determined, and scaling, translation, rotation and other operations can be performed. This multi-point touch implementation method is relatively simple and can be realized by axis coordinate method. The ITO is divided into X and Y axes, and two touch operations can be sensed, but sensing touch and detecting the specific position of touch are two concepts.

[0003] With the popularity of smart phones, people's requirements for the performance of touch screens are getting higher and higher. Multi-point capacitive touch screens are widely used because of their support for multi-point touch, high sensitivity, low power consumption and other advantages. However, the existing multi-point capacitive touch screens still have problems such as insufficient sensitivity and unstable touch in some cases. At the same time, the existing touch screens are generally bonded to the mobile phone base, which can easily cause the touch screen to fall off after a long period of use. Summary of the Invention

[0004] The present invention aims to provide a highly sensitive multi-point capacitive touch screen for mobile phones, aiming to solve the problems of low sensitivity and unstable touch in existing multi-point capacitive touch screens in some cases. In addition, existing touch screens are generally bonded to the base of the mobile phone, which can easily cause them to fall off during long-term use.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-sensitivity multi-point capacitive touch screen for a mobile phone, comprising:

[0007] Touch screen body;

[0008] A frame is provided on the lower side of the touch screen body;

[0009] A support frame is fixedly arranged on the inner wall of the frame, and the top of the support frame is bonded to the bottom of the touch screen body;

[0010] A bottom shell is provided on the lower side of the support frame and matches the frame;

[0011] The fixing mechanism is provided with four groups for fixing the touch screen body on the support frame, wherein

[0012] Each set of fixing mechanisms includes:

[0013] A positioning block, fixed to the bottom of the support frame;

[0014] a card slot, provided on the bottom shell;

[0015] An extrusion block is fixed on the bottom wall of the card slot;

[0016] A hollow column, fixed to the bottom of the touch screen body;

[0017] A rotating rod, rotatably connected to the hollow column;

[0018] A limiting bar is fixed to the bottom of the rotating rod, and the limiting bar is located between the extrusion block and the positioning block and is stuck;

[0019] A clamping ring component is connected to the rotating rod to prevent it from falling out of the hollow column.

[0020] As a preferred solution of the present invention, the touch screen body is composed of a glass panel layer, a transparent adhesive layer and a sensing layer, and the transparent adhesive layer is located between the glass panel layer and the sensing layer.

[0021] As a preferred solution of the present invention, the sensing layer includes an insulating layer, a conductive layer, and a touch sensing layer. The glass panel layer covers the sensing layer. The transparent adhesive layer is arranged below the glass panel layer. The transparent adhesive layer forms a capacitive coupling with the sensing layer.

[0022] As a preferred solution of the present invention, the touch sensing layer is made of micro-nano conductive material, and a plurality of capacitor nodes are formed on the surface of the touch sensing layer.

[0023] As a preferred solution of the present invention, a control circuit is provided in the touch screen body, and the control circuit is responsible for measuring the charge change and converting it into a touch signal.

[0024] As a preferred solution of the present invention, the touch screen body is further provided with a capacitive sensor array, a signal processing unit, a multi-touch algorithm unit, a touch screen driving unit and an adaptive adjustment unit.

[0025] As a preferred solution of the present invention, the capacitive sensor array adopts high-performance capacitive sensors, the signal processing unit adopts advanced signal processing algorithms, the multi-touch algorithm unit supports simultaneous identification of multiple touch positions, and the adaptive adjustment unit automatically adjusts the sensitivity of the touch screen according to the usage environment.

[0026] As a preferred solution of the present invention, each group of the clamping ring components consists of a limiting ring and a limiting groove, the limiting groove is opened on the inner wall of the hollow column, the limiting ring is fixed on the circumferential surface of the rotating rod, and the limiting ring is embedded in the limiting groove and is slidably connected.

[0027] As a preferred solution of the present invention, threaded holes are provided on both side ends of the frame, and a plurality of the threaded holes extend to the bottom shell, and bolts are threadedly connected in the plurality of threaded holes.

[0028] As a preferred solution of the present invention, the bottom edge of each of the limiting strips is distributed in an inclined shape.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. In this solution, through the fixing mechanism provided, when the touch screen body is adhered to the support frame, multiple sets of fixing mechanisms can be used to further fix the touch screen body, so that the touch screen body is not easily separated from the frame during long-term use.

[0031] 2. In this solution, the capacitive sensor array, signal processing unit, multi-touch algorithm unit, touch screen drive unit and adaptive adjustment unit are provided to effectively improve the sensitivity of the touch screen, making the touch more accurate and smooth; adopt advanced signal processing algorithms to effectively suppress noise and improve the anti-interference ability of the touch screen; support multi-touch to improve user experience; optimize the touch screen structure design and reduce the power consumption of the touch screen; have adaptive functions to meet the usage requirements in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 Schematic diagram of the three-dimensional structure of the present invention;

[0034] Figure 2 This is an exploded perspective diagram from the first perspective of the present invention;

[0035] Figure 3 It is a bottom-up perspective view of the present invention;

[0036] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0037] Figure 5 It is a partial stereoscopic view of the clamping ring component in the present invention;

[0038] Figure 6 This is an exploded perspective diagram from a second perspective in the present invention;

[0039] Figure 7 is a cross-sectional view of the touch screen body of the present invention;

[0040] Figure 8 Schematic diagram of the internal structure of the touch sensing layer in the present invention;

[0041] Figure 9 Array distribution diagram of capacitor nodes in the present invention.

[0042] In the figure: 1. Touch screen body; 101. Glass panel layer; 102. Transparent adhesive layer; 103. Sensing layer; 1031. Insulating layer; 1032. Conductive layer; 1033. Touch sensing layer; 10331. Capacitor node; 2. Frame; 3. Support frame; 4. Bottom shell; 5. Card slot; 6. Extrusion block; 7. Hollow column; 8. Rotating rod; 9. Limiting bar; 10. Positioning block; 11. Threaded hole; 12. Bolt; 13. Limiting ring; 14. Limiting slot. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] Example 1

[0045] See also Figures 1-9 , the present invention provides the following technical solutions:

[0046] A high-sensitivity multi-point capacitive touch screen for a mobile phone, comprising:

[0047] Touch screen body 1;

[0048] The frame 2 is provided on the lower side of the touch screen body 1;

[0049] The support frame 3 is fixedly mounted on the inner wall of the frame 2, and the top of the support frame 3 is bonded to the bottom of the touch screen body 1;

[0050] The bottom shell 4 is provided on the lower side of the support frame 3 and matches the frame 2;

[0051] The fixing mechanism has four groups for fixing the touch screen body 1 on the support frame 3.

[0052] Each set of fixing mechanisms includes:

[0053] The positioning block 10 is fixed to the bottom of the support frame 3;

[0054] A card slot 5 is provided on the bottom shell 4;

[0055] The extrusion block 6 is fixed on the bottom wall of the card slot 5;

[0056] A hollow column 7 is fixed to the bottom of the touch screen body 1;

[0057] The rotating rod 8 is rotatably connected to the hollow column 7;

[0058] The limiting strip 9 is fixed to the bottom of the rotating rod 8, and the limiting strip 9 is located between the extrusion block 6 and the positioning block 10 and is stuck;

[0059] The clamping ring component is connected to the rotating rod 8 to prevent it from falling out of the hollow column 7.

[0060] In a specific embodiment of the present invention, the frame 2 and the support frame 3 are integrally formed, the touch screen body 1 is bonded to the top of the support frame 3 in the frame 2, the support frame 3 carries the touch screen body 1, and the bottom shell 4 is arranged at the bottom of the frame 2, and the touch screen body 1 is located in the frame 2, and the bottom shell 4 is electrically connected to the touch screen body 1. Through the provided fixing mechanism, the fixing mechanism is provided with four groups, which can further fix the touch screen body 1 on the support frame 3, so that the touch screen body 1 is not easy to fall off from the support frame 3 after long-term use. In the fixing mechanism, the hollow column 7 is fixed to the bottom of the touch screen body 1, and the rotating rod 8 can rotate in the hollow column 7. When the rotating rod 8 rotates and drives the limit bar 9 to move, the limit bar 9 One end of the limit strip 9 abuts against the positioning block 10, and the limit strip 9 and the positioning block 10 are distributed in a parallel state. At this time, the bottom shell 4 is buckled on the bottom of the touch screen body 1, so that the extrusion block 6 on the bottom shell 4 can squeeze the limit strip 9. The bottom of the limit strip 9 is inclined, so that when the bottom shell 4 is buckled, if a little gap is generated between the limit strip 9 and the positioning block 10, the end of the extrusion block 6 can be squeezed against the inclined surface of the bottom shell 4 when the extrusion block 6 moves, and the limit strip 9 is squeezed so that the two ends of the limit strip 9 are respectively fitted between the ends close to the positioning block 10 and the extrusion block 6. In this way, the limit strip 9 cannot rotate, and the limit strip 9 is buckled at the bottom of the support frame 3, making the touch screen body 1 more stable when installed on the support frame 3.

[0061] Specifically, the touch screen body 1 is composed of a glass panel layer 101, a transparent adhesive layer 102 and a sensing layer 103. The transparent adhesive layer 102 is located between the glass panel layer 101 and the sensing layer 103. The glass panel layer 101 is tempered glass, the transparent adhesive layer 102 is optically transparent adhesive, and the sensing layer 103 includes an insulating layer 1031, a conductive layer 1032, and a touch sensing layer 1033. The glass panel layer 101 covers the sensing layer 103, and the transparent adhesive layer 102 is arranged below the glass panel layer 101. The transparent adhesive layer 102 and the sensing layer 103 form a capacitive coupling.

[0062] In this embodiment, the touch sensing layer 1033 is made of micro-nano-scale conductive material, with multiple tiny capacitor nodes 10331 formed on its surface. Each node can independently sense touch signals. An insulating layer 1031 covers the touch sensing layer 1033 to ensure efficient charge transfer between the touch sensing layer 1033 and the conductive layer 1032. The touch sensing layer 1033 is disposed below the insulating layer 1031 and forms a capacitive coupling with the touch sensing layer 1033. When a finger touches the screen, the body's charge changes the electric field distribution on the touch sensing layer 1033, thereby being sensed. A control circuit is provided within the touch screen body 1, which is responsible for measuring these charge changes and converting them into corresponding touch signals. By analyzing the location and strength of the touch signals, the system can determine the user's touch location and operation intention. In addition, the control circuit also uses advanced signal processing algorithms to effectively filter noise signals and improve the stability and accuracy of the touch signals. The high-sensitivity multi-point capacitive mobile phone touch screen of the present invention can be widely used in various smart phone devices. During specific implementation, the parameters and layout of the touch sensing layer 1033, the insulating layer 1031, the conductive layer 1032, and the control circuit can be adjusted according to the size and performance requirements of different devices to achieve the best touch effect. In addition, the present invention can also be combined with other touch technologies, such as pressure sensing and gesture recognition, to further enrich the touch operation mode and enhance the user experience. The present invention optimizes the design of the touch sensing layer 1033 to improve the touch screen's ability to sense touch signals, thereby achieving faster and more accurate touch operations. It also realizes multi-touch and supports simultaneous operation of multiple fingers to meet the user's diverse operating needs and improve the convenience of operation. It has high stability and adopts advanced signal processing algorithms to effectively filter noise signals and improve the stability of touch signals.

[0063] Specifically, each set of clamping ring components consists of a limiting ring 13 and a limiting groove 14. The limiting groove 14 is opened on the inner wall of the hollow column 7. The limiting ring 13 is fixed on the circumferential surface of the rotating rod 8. The limiting ring 13 is embedded in the limiting groove 14 for sliding connection.

[0064] In this embodiment: through the provided clamping ring component, when the rotating rod 8 rotates in the hollow column 7, the rotating rod 8 drives the limiting ring 13 to slide in the limiting groove 14 in the hollow column 7. Since the limiting ring 13 is embedded in the limiting groove 14, the position of the rotating rod 8 is limited, and it can only rotate in the hollow column 7 and cannot be separated from the hollow column 7. In this way, when the positioning block 10 is attached to the bottom of the support frame 3, it is more stable and not easy to fall off due to gaps.

[0065] Specifically, threaded holes 11 are formed on both side ends of the frame 2 , and the plurality of threaded holes 11 extend to the bottom shell 4 , and bolts 12 are threadedly connected in the plurality of threaded holes 11 .

[0066] In this embodiment: when the bottom shell 4 is embedded in the bottom of the frame 2, the frame 2 and the bottom shell 4 are fixed firmly by means of the bolts 12 threadedly connected to the threaded holes 11. The threaded holes 11 of the frame 2 are provided with bolt countersunk grooves on the outside so that the heads of the bolts 12 can be embedded in the countersunk grooves. When the bolts 12 are threadedly connected to the threaded holes 11 to fix the frame 2 and the bottom shell 4, the heads of the bolts 12 will not appear outside the surface of the frame 2, making the surface of the frame 2 smoother.

[0067] Specifically, the touch screen body 1 is further provided with a capacitive sensor array, a signal processing unit, a multi-touch algorithm unit, a touch screen driving unit and an adaptive adjustment unit.

[0068] In this embodiment: In the present invention,

[0069] Capacitive sensor array: uses high-performance capacitive sensors to detect the location and number of touch points on the touch screen;

[0070] Signal processing unit: Receives signals from the capacitive sensor array and uses advanced signal processing algorithms to effectively suppress noise and improve the touch screen's anti-interference ability;

[0071] Multi-touch algorithm unit: identifies multiple touch points based on the processing results of the signal processing unit to achieve multi-touch function;

[0072] Touch screen driving unit: drives the touch screen to perform corresponding operations according to the processing results of the multi-touch algorithm unit;

[0073] Adaptive adjustment unit: automatically adjusts the sensitivity of the touch screen according to the usage environment to meet the usage needs in different scenarios;

[0074] It can effectively improve the sensitivity of the touch screen, making the touch more accurate and smooth; adopt advanced signal processing algorithms to effectively suppress noise and improve the anti-interference ability of the touch screen; support multi-touch to improve user experience; optimize the touch screen structure design and reduce the power consumption of the touch screen; and have adaptive functions to meet the usage needs in different scenarios.

[0075] Working principle and use process of the present invention: In the present invention, through the fixing mechanism provided, when the touch screen body 1 is adhered to the support frame 3, multiple sets of fixing mechanisms can be used to further fix the touch screen body 1, so that the touch screen body 1 is not easy to fall off from the frame 2 during long-term use;

[0076] Through the capacitive sensor array, signal processing unit, multi-touch algorithm unit, touch screen drive unit and adaptive adjustment unit, the sensitivity of the touch screen can be effectively improved, making the touch more accurate and smooth; the advanced signal processing algorithm is used to effectively suppress noise and improve the anti-interference ability of the touch screen; support multi-touch to improve user experience; optimize the touch screen structure design and reduce the power consumption of the touch screen; with adaptive functions to meet the usage needs in different scenarios.

[0077] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high-sensitivity multi-point capacitive touch screen for mobile phones, characterized in that: include: Touch screen body (1); A frame (2) is provided on the lower side of the touch screen body (1); A support frame (3) is fixedly arranged on the inner wall of the frame (2), and the top of the support frame (3) is bonded to the bottom of the touch screen body (1); A bottom shell (4) is arranged on the lower side of the support frame (3) and matches the frame (2); A fixing mechanism, which is provided with four groups, is used to fix the touch screen body (1) on the support frame (3), wherein Each set of fixing mechanisms includes: A positioning block (10) is fixed to the bottom of the support frame (3); A card slot (5) is provided on the bottom shell (4); An extrusion block (6) is fixed on the bottom wall of the card slot (5); A hollow column (7) fixed to the bottom of the touch screen body (1); A rotating rod (8) is rotatably connected to the hollow column (7); The limit bar (9) is fixed to the bottom of the rotating rod (8), and the limit bar (9) is located between the extrusion block (6) and the positioning block (10) and is stuck. When the rotating rod (8) rotates and drives the limit bar (9) to move, one end of the limit bar (9) abuts against the positioning block (10), and the limit bar (9) and the positioning block (10) are distributed in a parallel state. The bottom shell (4) is buckled onto the bottom of the touch screen body (1), so that the extrusion block (6) on the bottom shell (4) can squeeze the limit bar (9), and the bottom of the limit bar (9) is inclined. The clamping ring component is connected to the rotating rod (8) so as to prevent it from falling out of the hollow column (7). Each set of the clamping ring components is composed of a limiting ring (13) and a limiting groove (14). The limiting groove (14) is opened on the inner wall of the hollow column (7). The limiting ring (13) is fixed on the circumferential surface of the rotating rod (8). The limiting ring (13) is embedded in the limiting groove (14) for sliding connection.

2. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 1, characterized in that: The touch screen body (1) is composed of a glass panel layer (101), a transparent adhesive layer (102) and a sensing layer (103), wherein the transparent adhesive layer (102) is located between the glass panel layer (101) and the sensing layer (103).

3. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 2, characterized in that: The sensing layer (103) comprises an insulating layer (1031), a conductive layer (1032), and a touch sensing layer (1033); the glass panel layer (101) covers the sensing layer (103); the transparent adhesive layer (102) is arranged below the glass panel layer (101); and the transparent adhesive layer (102) forms capacitive coupling with the sensing layer (103).

4. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 3, characterized in that: The touch sensing layer (1033) is made of micro-nano conductive material, and a plurality of capacitor nodes are formed on the surface of the touch sensing layer (1033).

5. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 4, characterized in that: A control circuit is provided in the touch screen body (1), and the control circuit is responsible for measuring charge changes and converting them into touch signals.

6. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 5, characterized in that: The touch screen body (1) is further provided with a capacitive sensor array, a signal processing unit, a multi-touch algorithm unit, a touch screen driving unit and an adaptive adjustment unit.

7. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 6, characterized in that: The signal processing unit adopts a signal processing algorithm, the multi-touch algorithm unit supports simultaneous recognition of multiple touch positions, and the adaptive adjustment unit automatically adjusts the sensitivity of the touch screen according to the use environment.

8. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 7, characterized in that: Each set of the clamping ring components consists of a limiting ring (13) and a limiting groove (14), wherein the limiting groove (14) is formed on the inner wall of the hollow column (7), the limiting ring (13) is fixed on the circumferential surface of the rotating rod (8), and the limiting ring (13) is embedded in the limiting groove (14) for sliding connection.

9. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 8, characterized in that: Threaded holes (11) are provided at both side ends of the frame (2), and a plurality of the threaded holes (11) extend to the bottom shell (4), and bolts (12) are threadedly connected in the plurality of threaded holes (11).

10. The high-sensitivity multi-point capacitive touch screen for mobile phones according to claim 9, characterized in that: The bottom edge of each of the limiting strips (9) is distributed in an inclined shape.

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