High-reliability capacitive screen

Abstract

The invention relates to the technical field of capacitive screens, in particular to a high-reliability capacitive screen which comprises a touch screen, a touch assembly and an MCU micro-control unit are arranged on the surface of the touch screen, one end of the MCU micro-control unit is in electric signal connection with the touch assembly, and the other end of the MCU micro-control unit is in electric signal connection with an external circuit board unit. The touch assembly is formed by the touch sensor group A, the touch sensor group B and the touch key group C, the touch sensor group A, the touch sensor group B and the touch key group C can transmit electric signals to the micro-control unit, the micro-control unit recognizes and analyzes the electric signals, and finally the recognized and analyzed electric signals are transmitted to the circuit board unit, so that control is realized, and the touch assembly is simple in structure and convenient to use. When one group of capacitive touch sensors works abnormally, the other group of capacitive touch sensors can be quickly switched to work, and if the two groups of capacitive touch sensors are abnormal, the peripheral touch keys can be quickly used for emergency operation.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitive screens, and in particular to a high-reliability capacitive screen. Background Art

[0002] Capacitive screen refers to capacitive touch screen, which works by using the current induction of the human body. Capacitive touch screen is a four-layer composite glass screen. The inner surface and interlayer of the glass screen are coated with a layer of ITO. The outermost layer is a thin layer of silica glass protective layer. The interlayer ITO coating is used as the working surface. Four electrodes are drawn out from the four corners. The inner layer ITO is a shielding layer to ensure a good working environment. When the finger touches the metal layer, due to the human body electric field, the user and the touch screen surface form a coupling capacitor. For high-frequency current, the capacitor is a direct conductor, so the finger absorbs a very small current from the contact point. This current flows out from the electrodes on the four corners of the touch screen, and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller obtains the position of the touch point by accurately calculating the proportion of these four currents.

[0003] The capacitive screen in the prior art generally has only one set of input devices, that is, there is only one set of touch sensors or touch buttons on the capacitive screen. Once an abnormal failure occurs on the touch screen, there is a risk that the device cannot be controlled. Summary of the invention

[0004] The purpose of the present invention is to provide a high-reliability capacitive screen, which solves the problem that the capacitive screen in the prior art generally has only one set of input devices, that is, there is only one set of touch sensors or touch buttons on the capacitive screen, and once an abnormal failure occurs on the touch screen, there is a risk of being unable to control the device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A high-reliability capacitive screen comprises a touch screen and an MCU microcontroller unit. A touch component and an MCU microcontroller unit are arranged on the surface of the touch screen. One end of the MCU microcontroller unit is connected to the touch component by electrical signals, and the other end of the MCU microcontroller unit is connected to an external circuit board unit by electrical signals. The touch component comprises a group A of touch sensors, a group B of touch sensors and a group C of touch buttons. A protective shell is arranged on the outer surface of the touch screen.

[0006] Preferably, a touch sensing layer channel and a touch driving layer channel are provided inside the touch screen, and the group A touch sensors and the group B touch sensors are symmetrically arranged in the same set of touch screen.

[0007] Preferably, the touch button is capacitive.

[0008] Preferably, the touch buttons are integrated on the edge of the touch screen.

[0009] Preferably, the group A touch sensors, the group B touch sensors and the group C touch buttons are all electrically connected to the MCU micro control unit.

[0010] Preferably, the protective shell is configured as a "mouth" shaped structure, an embedding groove is provided at the bottom of the protective shell, the touch screen is placed inside through the bottom embedding groove, and sealing gaskets are provided at the bottom and top wall of the protective shell to achieve a state in which the top and bottom of the touch screen are in contact with the sealing gasket. By providing the sealing gasket, after the touch screen is installed, the entire protective shell will be squeezed, and the sealing gasket will be subjected to pressure to form a protected state, wherein a sealant layer is provided at the position where the sealing gasket contacts the touch screen to further achieve a sealing effect.

[0011] Preferably, a protective layer is provided on the top of the touch screen, and the protective layer is made of a silica glass plate.

[0012] Preferably, the surface of the protective shell is arranged as an embedded groove, and a through hole for the bolt to penetrate is arranged inside the embedded groove.

[0013] Preferably, a round hole for the wire to pass through is opened on the side wall of the protective shell, and a sealing sleeve is arranged inside the round hole.

[0014] The present invention has at least the following beneficial effects: A touch component is formed by setting up a group A of touch sensors, a group B of touch sensors and a group C of touch buttons. All three can transmit electrical signals to a microcontroller unit, which then identifies and analyzes the electrical signals and finally transmits the identified and analyzed electrical signals to a circuit board unit, thereby achieving control and ensuring that when one group of capacitive touch sensors fails to work properly, it can quickly switch to another group of capacitive touch sensors. If both groups of capacitive touch sensors fail to work properly, the surrounding touch buttons can be quickly used for emergency operations.

[0015] By setting a protective shell on the outside of the touch capacitive screen, the touch screen can be well protected, and a sealing gasket and a sealing rubber layer are provided between the touch screen and the protective shell to further protect it. The protective shell is made of one-piece PVC material, which can reduce moisture from entering the assembled capacitive screen and affecting the internal electrical signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a cross-sectional view of the protective housing of the present invention; Figure 3 It is a schematic diagram of the process of the present invention; Figure 4 It is a schematic diagram of the touch screen structure of the present invention.

[0018] In the figure: 1. Protective shell; 2. Group C touch buttons; 3. Group A touch sensors; 4. Touch screen; 5. Sealing gasket; 6. Sealing sleeve; 7. Group B touch sensors; 8. Silica glass plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] Reference Figure 1-4A high-reliability capacitive screen comprises a touch screen 4 and an MCU microcontroller unit. A touch component and an MCU microcontroller unit are arranged on the surface of the touch screen 4. One end of the MCU microcontroller unit is electrically connected to the touch component, and the other end of the MCU microcontroller unit is electrically connected to an external circuit board unit. The touch component comprises a group A touch sensor 3, a group B touch sensor 7 and a group C touch button 2. A protective shell 1 is arranged on the outer surface of the touch screen 4. Both groups of touch sensors and touch buttons are electrically connected to the microcontroller, and can be automatically identified by the microcontroller. When one group of touch sensors fails, it can be used by the other group of touch sensors or directly by the touch buttons, that is, both groups of touch sensors and touch buttons can be used for the purpose of control. The touch sensor or the touch button transmits the electrical signal to the microcontroller, and the microcontroller identifies and analyzes the electrical signal, and finally transmits the identified and analyzed electrical signal to the circuit board unit, thereby realizing control.

[0025] Furthermore, a touch sensing layer channel and a touch driving layer channel are provided inside the touch screen 4 , and the group A touch sensors 3 and the group B touch sensors 7 are symmetrically arranged in the same set of touch screen 4 .

[0026] Furthermore, the touch button is capacitive.

[0027] Furthermore, the touch buttons are integrated on the edge of the touch screen 4 .

[0028] Furthermore, the group A touch sensors 3, the group B touch sensors 7 and the group C touch keys 2 are all electrically connected to the MCU micro control unit.

[0029] Furthermore, the protective shell 1 is configured as a "mouth" shaped structure, an embedding groove is provided at the bottom of the protective shell 1, the touch screen 4 is placed inside through the bottom embedding groove, and the bottom and top wall of the protective shell 1 are provided with sealing pads 5 to achieve a state in which the top and bottom of the touch screen 4 are in contact with the sealing pads 5. By providing the sealing pads 5, after the touch screen 4 is installed, the entire protective shell 1 will be squeezed, and the sealing pads 5 will be subjected to pressure to form a protected state, wherein a sealing rubber layer is provided at the position where the sealing pads 5 contact the touch screen 4, which further achieves a sealing effect. The protective shell adopts an integrally molded PVC material, which can reduce the moisture from entering the assembled capacitive screen, causing the internal electrical signal transmission to be affected.

[0030] A protective layer is disposed on the top of the touch screen 4 , and the protective layer is made of a silica glass plate 8 , which can effectively reduce scratches on the touch screen 4 .

[0031] The surface of the protective shell is arranged as an embedded groove, and the interior of the embedded groove is arranged with a through hole for the bolt to penetrate. At the same time, it is more than an embedded groove. When the touch screen 4 needs to be installed, it can be installed through the protective shell, and the bolts after installation can be hidden.

[0032] The side wall of the protective shell is provided with a circular hole for the wire to pass through, and a sealing sleeve 6 is arranged inside the circular hole, thereby achieving a good protective effect on the touch screen 4 and further reducing the influence of external moisture on the assembled touch screen 4.

[0033] In summary, by setting up a touch component including a group A touch sensors 3, a group B touch sensors 7 and a group C touch buttons 2, all three can transmit electrical signals to the microcontroller unit, which then identifies and analyzes the electrical signals, and finally transmits the identified and analyzed electrical signals to the circuit board unit, thereby realizing control and ensuring that when one group of capacitive touch sensors fails to work properly, it can quickly switch to another group of capacitive touch sensors. If both groups of capacitive touch sensors fail to work properly, the surrounding touch buttons can be quickly used for emergency operations.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A high reliability capacitive touch screen, characterized in that: The invention comprises a touch screen (4) and an MCU micro-control unit, wherein a touch component and an MCU micro-control unit are arranged on the surface of the touch screen (4), one end of the MCU micro-control unit is connected to the touch component by electrical signals, and the other end of the MCU micro-control unit is connected to an external circuit board unit by electrical signals, the touch component comprises a group A touch sensor (3), a group B touch sensor (7) and a group C touch button (2), and a protective housing (1) is arranged on the outer surface of the touch screen (4).

2. A high reliability capacitive touch screen according to claim 1, characterized in that: A touch sensing layer channel and a touch driving layer channel are provided inside the touch screen (4), and the group A touch sensors (3) and the group B touch sensors (7) are symmetrically arranged in the same set of touch screen (4).

3. A high reliability capacitive touch screen according to claim 2, characterized in that: The touch button is capacitive.

4. A high reliability capacitive touch screen according to claim 3, characterized in that: The touch buttons are integrated on the edge of the touch screen (4).

5. The high reliability capacitive touch screen according to claim 1, characterized in that: The group A touch sensors (3), the group B touch sensors (7) and the group C touch keys (2) are all connected to the MCU micro control unit via electrical signals.

6. A high reliability capacitive touch screen according to claim 2, characterized in that: The protective shell (1) is configured as a "mouth"-shaped structure; an embedding groove is provided at the bottom of the protective shell (1); the touch screen (4) is placed inside through the bottom embedding groove; the bottom and top wall of the protective shell (1) are both provided with sealing pads (5) to achieve a state in which the top and bottom of the touch screen (4) are in contact with the sealing pads (5); by providing the sealing pads (5), after the touch screen (4) is installed, the entire protective shell (1) is squeezed, thereby causing the sealing pad (5) to be subjected to pressure and to form a protective state; wherein a sealing layer is provided at a position where the sealing pad (5) contacts the touch screen (4) to further achieve a sealing effect.

7. The high reliability capacitive touch screen according to claim 1, characterized in that: A protective layer is provided on the top of the touch screen (4), and the protective layer is made of a silica glass plate (8).

8. The high reliability capacitive touch screen according to claim 1, characterized in that: The surface of the protective shell is arranged as an embedded groove, and the interior of the embedded groove is arranged with a through hole for the bolt to penetrate.

9. The high reliability capacitive touch screen according to claim 1, characterized in that: The side wall of the protective shell is provided with a round hole for the wire to pass through, and a sealing sleeve is arranged inside the round hole.

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