CN215067808U

CN215067808U - Protection control circuit for large-size touch screen

Info

Publication number: CN215067808U
Application number: CN202121259584.6U
Authority: CN
Inventors: 张康燕; 冯仙
Original assignee: Suzhou Pixcir Microelectronics Co Ltd
Current assignee: Suzhou Pixcir Microelectronics Co Ltd
Priority date: 2021-06-07
Filing date: 2021-06-07
Publication date: 2021-12-07
Anticipated expiration: 2031-06-07

Abstract

The utility model provides a protection control circuit for jumbo size touch-sensitive screen has solved the technical problem who lacks the protection circuit to transient state interference among the control circuit of present jumbo size touch-sensitive screen. A protection control circuit for a large-size touch screen comprises a microcontroller circuit, a power supply circuit and a control circuit, wherein the microcontroller circuit is connected with the power supply circuit; a protection circuit connected to the power supply circuit; the microcontroller circuit is provided with a microcontroller U1, and the protection circuit comprises a connector P1, a diode TVS1, a diode TVS2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6.

Description

Protection control circuit for large-size touch screen

Technical Field

The utility model belongs to the technical field of the touch-sensitive screen circuit technique and specifically relates to a protection control circuit for jumbo size touch-sensitive screen is related to.

Background

Nowadays, touch screens are not only available on electronic products such as smart phones and tablet computers, but also available on intelligent terminals such as business meeting interaction, intelligent education blackboards and advertising screens. The diversification of the application field puts more differentiation requirements on the specification and the size of the touch screen, and the ideal touch screen has the characteristics of proper size, quick response, accuracy, controllability and the like.

The on or off of the circuit, the change of the power supply, the change of the circuit parameters, the change of the circuit and the like can easily cause transient interference, particularly for a large-size touch screen, the transient interference of voltage and current can be easily caused due to the larger screen size, but a protection circuit aiming at the transient interference is lacked in the control circuit of the current large-size touch screen.

SUMMERY OF THE UTILITY MODEL

The utility model provides a protection control circuit for jumbo size touch-sensitive screen has solved the technical problem who lacks the protection circuit to transient state interference among the control circuit of present jumbo size touch-sensitive screen.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a protection control circuit for a large-size touch screen comprises a microcontroller circuit, a power supply circuit and a control circuit, wherein the microcontroller circuit is connected with the power supply circuit; a protection circuit connected to the power supply circuit; the microcontroller circuit is provided with a microcontroller U1, and the protection circuit comprises a connector P1, a diode TVS1, a diode TVS2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; the 10 pins of the connector P1 are connected to the 1 pin of the diode TVS1 and the resistor R1, the 8 pins of the connector P1 are connected to the 1 pin of the diode TVS2 and the resistor R2, pin 2 of the diode TVS1 and pin 2 of the diode TVS2 are grounded respectively, the pin 5 and the pin 6 of the connector P1 are connected and then grounded, the pin 1 and the pin 2 of the connector P1 are connected and then grounded, the connector P1 is connected with the power circuit after the 3 pins and the 4 pins are connected, the resistor R1 is connected with the resistor R3, the resistor R5 and the 3 pins of the microcontroller U1, the resistor R2 is connected with the resistor R4, the resistor R6 and the 25 pins of the microcontroller U1, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are respectively connected to the power circuit.

In one embodiment of the present disclosure, the microcontroller circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, and a resistor R7; pin 23 of the microcontroller U1 is connected to the capacitor C1, pin 24 of the microcontroller U1 is connected to the capacitor C2, pin 32 of the microcontroller U1 is connected to the resistor R7 and the capacitor C3, the resistor R7 is connected to the power supply circuit, pin 45 of the microcontroller U1 is connected to the capacitor C4, pin 50 of the microcontroller U1 is connected to the capacitor C5, and pin 51 of the microcontroller U1 is connected to the capacitor C6; the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 are respectively grounded.

The utility model discloses an embodiment, power supply circuit includes USB interface circuit and filter circuit, USB interface circuit includes female seat J1 of USB, resistance R8 and resistance R9, female seat J1's of USB 1 pin with filter circuit connects, female seat J1's of USB 2 pins with resistance R8 connects, female seat J1's of USB 3 pins with resistance R9 connects, female seat J1's of USB 6 pins, 7 pins, 8 pins and 9 pins ground connection respectively, resistance R8 with microcontroller U1's 46 pins are connected, resistance R9 with microcontroller U1's 47 pins are connected, female seat J1's of USB 4 pins and 5 pins are connected back ground connection.

The utility model discloses an embodiment, filter circuit includes diode TVS3, inductance L1, inductance L2, inductance L3 and electric capacity C7, diode TVS 3's 1 pin all with female seat J1's of USB 1 pin with inductance L2 connects, diode TVS 3's 2pin inductance L1 with inductance L3 is connected the back ground connection, inductance L3 with electric capacity C7 is connected the back ground connection, inductance L1 ground connection, electric capacity C7 with the extreme point that inductance L2 connects is filter circuit's output.

The utility model discloses an embodiment, filter circuit still includes electric capacity C8, electric capacity C8 one end all with diode TVS3 1 pin with inductance L2 connects, the other end all with diode TVS 32 pins inductance L1 with inductance L3 connects.

The utility model discloses an embodiment, filter circuit still includes electric capacity C9, electric capacity C9 one end all with electric capacity C8 diode TVS 3's 1 pin with inductance L2 connects, the other end all with electric capacity C8 diode TVS 3's 2 pins inductance L1 with inductance L3 connects.

The utility model discloses an in the embodiment, filter circuit still includes electric capacity C10, electric capacity C10 one end all with electric capacity C7 with inductance L2 is connected, the other end all with electric capacity C7 with inductance L3 is connected.

The utility model discloses an embodiment, power supply circuit still includes voltage stabilizing circuit, voltage stabilizing circuit includes steady voltage chip U2 and electric capacity C11, the 1 pin of steady voltage chip U2 and the extreme point that 3 pins are connected with filter circuit's output is connected, steady voltage chip U2's 4 pins with electric capacity C11 connects, steady voltage chip U2's 2 pins with electric capacity C11 is connected back ground connection, steady voltage chip U2's 5 pins do voltage stabilizing circuit's output.

The utility model discloses an embodiment, voltage stabilizing circuit still includes electric capacity C12, electric capacity C12 one end all with voltage stabilizing chip U2's 1 pin and 3 pin are connected, the other end all with voltage stabilizing chip U2's 2 pins with electric capacity C11 connects.

The utility model discloses an embodiment, voltage stabilizing circuit still includes electric capacity C13, electric capacity C13 one end with 5 pins of steady voltage chip U2 are connected, the other end all with electric capacity C11 electric capacity C12 with 2 pins of steady voltage chip U2 are connected.

To sum up, the utility model discloses following beneficial effect has: the utility model discloses a set up protection circuit, microcontroller's UART's receipt and transmission pin all establish the transient state diode to and a plurality of resistances of series-parallel connection, make transient state interference obtain effective suppression, and then protection circuit, prevent that the circuit from damaging.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a protection circuit according to some embodiments of the present invention.

Fig. 2 is a schematic circuit diagram of a microcontroller circuit according to some embodiments of the present invention.

Fig. 3 is a schematic circuit diagram of a USB interface circuit according to some embodiments of the present invention.

Fig. 4 is a schematic circuit diagram of a filter circuit according to some embodiments of the present invention.

Fig. 5 is a schematic circuit diagram of a voltage regulator circuit according to some embodiments of the present invention.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "length," "vertical," "horizontal," "top," "bottom," and the like are used in the orientation and positional relationship shown in the drawings for convenience in describing the embodiments of the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the embodiments of the present invention can be understood by those skilled in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not in direct contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or reference letters in the various examples for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the utility model provides a protection control circuit for a large-size touch screen, which comprises a microcontroller circuit connected with a power circuit; a protection circuit connected to the power supply circuit; the microcontroller circuit is provided with a microcontroller U1, and the protection circuit comprises a connector P1, a diode TVS1, a diode TVS2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; the 10 pins of the connector P1 are connected to the 1 pin of the diode TVS1 and the resistor R1, the 8 pins of the connector P1 are connected to the 1 pin of the diode TVS2 and the resistor R2, pin 2 of the diode TVS1 and pin 2 of the diode TVS2 are grounded respectively, the pin 5 and the pin 6 of the connector P1 are connected and then grounded, the pin 1 and the pin 2 of the connector P1 are connected and then grounded, the connector P1 is connected with the power circuit after the 3 pins and the 4 pins are connected, the resistor R1 is connected with the resistor R3, the resistor R5 and the 3 pins of the microcontroller U1, the resistor R2 is connected with the resistor R4, the resistor R6 and the 25 pins of the microcontroller U1, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are respectively connected to the power circuit.

The basic principle of the touch screen for realizing the touch control function through the control circuit thereof is the existing mature technology, and is not described here. In this embodiment, the connection relationship of all circuit components is not described in detail, and specific connection relationships can be seen in fig. 1 to 5.

The specific circuit of the protection circuit is shown in fig. 1, and particularly, the connector P1 is 12Pin Header; the diode TVS1 and the diode TVS2 are both AZ5125-01H in model.

It is understood that fig. 1 is only one embodiment, and various models can be replaced and corresponding parameters can be modified to adapt to actual requirements.

In some embodiments, the microcontroller circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, and a resistor R7; pin 23 of the microcontroller U1 is connected to the capacitor C1, pin 24 of the microcontroller U1 is connected to the capacitor C2, pin 32 of the microcontroller U1 is connected to the resistor R7 and the capacitor C3, the resistor R7 is connected to the power supply circuit, pin 45 of the microcontroller U1 is connected to the capacitor C4, pin 50 of the microcontroller U1 is connected to the capacitor C5, and pin 51 of the microcontroller U1 is connected to the capacitor C6; the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 are respectively grounded.

The specific circuit of the microcontroller circuit is shown in fig. 2, and particularly, the model of the microcontroller U1 is M482 size 64. It is understood that fig. 2 is only one embodiment, and various models can be replaced and corresponding parameters can be modified to adapt to actual requirements.

In some embodiments, the power circuit includes a USB interface circuit and a filter circuit, the USB interface circuit includes a USB female socket J1, a resistor R8 and a resistor R9, a pin 1 of the USB female socket J1 is connected to the filter circuit, a pin 2 of the USB female socket J1 is connected to the resistor R8, a pin 3 of the USB female socket J1 is connected to the resistor R9,

pins

6, 7, 8 and 9 of the USB female socket J1 are grounded, respectively, the resistor R8 is connected to a pin 46 of the microcontroller U1, the resistor R9 is connected to a pin 47 of the microcontroller U1, and

pins

4 and 5 of the USB female socket J1 are grounded after being connected.

The specific circuit of the USB interface circuit is shown in fig. 3, and particularly, the USB female socket J1 is a B-type Mini USB interface. It is understood that fig. 3 is only one embodiment, and various models can be replaced and corresponding parameters can be modified to adapt to actual requirements.

In some embodiments, the filter circuit includes a diode TVS3, an inductor L1, an inductor L2, an inductor L3, and a capacitor C7, where pin 1 of the diode TVS3 is connected to pin 1 of the USB female socket J1 and the inductor L2, pin 2 of the diode TVS3, the inductor L1, and the inductor L3 are connected to ground, the inductor L3 is connected to the capacitor C7 and then grounded, the inductor L1 is grounded, and a terminal point at which the capacitor C7 is connected to the inductor L2 is an output terminal of the filter circuit.

The output ends of the filter circuit are connected with the resistor R5, the resistor R6 and the 3 pins and the 4 pins of the connector P1. The filter circuit outputs a voltage of 5V, as shown in fig. 4, and +5Vin is simply indicated.

The specific circuit of the filter circuit is shown in fig. 4, and particularly, the model of the diode TVS3 is AZ 5125-01H. It is understood that fig. 4 is only one embodiment, and various models can be replaced and corresponding parameters can be modified to adapt to actual requirements. On the basis of the present embodiment, various filtering forms in the prior art may be added in order to increase the filtering effect.

In the present application, various filtering forms are added on the basis of the above embodiment, so as to further filter the power supply interference.

In some embodiments, the filter circuit further includes a capacitor C8, and the capacitor C8 has one end connected to the 1 pin of the diode TVS3 and the inductor L2, and has the other end connected to the 2pin of the diode TVS3, the inductor L1, and the inductor L3.

In some embodiments, the filter circuit further includes a capacitor C9, and the capacitor C9 has one end connected to the capacitor C8, the pin 1 of the diode TVS3, and the inductor L2, and has the other end connected to the capacitor C8, the pin 2 of the diode TVS3, the inductor L1, and the inductor L3.

In some embodiments, the filter circuit further includes a capacitor C10, and the capacitor C10 has one end connected to the capacitor C7 and the inductor L2, and another end connected to the capacitor C7 and the inductor L3.

In some embodiments, the power circuit further includes a voltage stabilizing circuit, the voltage stabilizing circuit includes a voltage stabilizing chip U2 and a capacitor C11, an end point of the voltage stabilizing chip U2 where the 1 pin and the 3 pin are connected is connected to the output end of the filter circuit, the 4 pin of the voltage stabilizing chip U2 is connected to the capacitor C11, the 2pin of the voltage stabilizing chip U2 is connected to the capacitor C11 and then grounded, and the 5 pin of the voltage stabilizing chip U2 is the output end of the voltage stabilizing circuit.

The output end of the voltage stabilizing circuit is connected with the resistor R3, the resistor R4 and the resistor R7.

The specific circuit of the voltage stabilizing circuit is shown in fig. 5, and particularly, the model of the voltage stabilizing chip U2 is FP6134-33S5 GTR. It is understood that fig. 5 is only one embodiment, and various models can be replaced and corresponding parameters can be modified to adapt to actual requirements. The voltage regulator circuit outputs 3.3V, as shown in FIG. 5, VDD3V is simply labeled.

In some embodiments, the voltage stabilizing circuit further comprises a capacitor C12, wherein one end of the capacitor C12 is connected to the 1 pin and the 3 pin of the voltage stabilizing chip U2, and the other end of the capacitor C12 is connected to the 2pin of the voltage stabilizing chip U2 and the capacitor C11.

In some embodiments, the voltage stabilizing circuit further includes a capacitor C13, and one end of the capacitor C13 is connected to the 5 pins of the voltage stabilizing chip U2, and the other end of the capacitor C13 is connected to the capacitor C11, the capacitor C12 and the 2 pins of the voltage stabilizing chip U2.

The above embodiments describe a plurality of specific embodiments of the present invention, but it should be understood by those skilled in the art that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention.

Claims

1. A protection control circuit for a large-size touch screen is characterized by comprising:

a microcontroller circuit connected with a power supply circuit;

a protection circuit connected to the power supply circuit;

the microcontroller circuit is provided with a microcontroller U1, and the protection circuit comprises a connector P1, a diode TVS1, a diode TVS2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6;

the 10 pins of the connector P1 are connected to the 1 pin of the diode TVS1 and the resistor R1, the 8 pins of the connector P1 are connected to the 1 pin of the diode TVS2 and the resistor R2, pin 2 of the diode TVS1 and pin 2 of the diode TVS2 are grounded respectively, the pin 5 and the pin 6 of the connector P1 are connected and then grounded, the pin 1 and the pin 2 of the connector P1 are connected and then grounded, the connector P1 is connected with the power circuit after the 3 pins and the 4 pins are connected, the resistor R1 is connected with the resistor R3, the resistor R5 and the 3 pins of the microcontroller U1, the resistor R2 is connected with the resistor R4, the resistor R6 and the 25 pins of the microcontroller U1, the resistor R3, the resistor R4, the resistor R5 and the resistor R6 are respectively connected to the power circuit.

2. The protection control circuit for the large-size touch screen according to claim 1, wherein the microcontroller circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6 and a resistor R7;

pin 23 of the microcontroller U1 is connected to the capacitor C1, pin 24 of the microcontroller U1 is connected to the capacitor C2, pin 32 of the microcontroller U1 is connected to the resistor R7 and the capacitor C3, the resistor R7 is connected to the power supply circuit, pin 45 of the microcontroller U1 is connected to the capacitor C4, pin 50 of the microcontroller U1 is connected to the capacitor C5, and pin 51 of the microcontroller U1 is connected to the capacitor C6;

the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6 are respectively grounded.

3. The protection control circuit for the large-size touch screen according to claim 1, wherein the power circuit comprises a USB interface circuit and a filter circuit, the USB interface circuit comprises a USB female socket J1, a resistor R8 and a resistor R9;

female seat J1 of USB's 1 pin with filter circuit connects, female seat J1 of USB's 2 pins with resistance R8 connects, female seat J1 of USB's 3 pins with resistance R9 connects, female seat J1 of USB's 6 pins, 7 pins, 8 pins and 9 pins ground connection respectively, resistance R8 with microcontroller U1's 46 pins are connected, resistance R9 with microcontroller U1's 47 pins are connected, female seat J1 of USB's 4 pins and 5 pins are connected the back ground connection.

4. The protection control circuit for the large-size touch screen as claimed in claim 3, wherein the filter circuit comprises a diode TVS3, an inductor L1, an inductor L2, an inductor L3 and a capacitor C7;

the 1 pin of the diode TVS3 is connected with the 1 pin of the USB female socket J1 and the inductor L2, the 2pin of the diode TVS3, the inductor L1 and the inductor L3 are connected and then grounded, the inductor L3 is connected with the capacitor C7 and then grounded, the inductor L1 is grounded, and the end point of the capacitor C7 connected with the inductor L2 is the output end of the filter circuit.

5. The protection control circuit for the large-size touch screen according to claim 4, wherein the filter circuit further comprises a capacitor C8;

one end of the capacitor C8 is connected to the pin 1 of the diode TVS3 and the inductor L2, and the other end is connected to the pin 2 of the diode TVS3, the inductor L1 and the inductor L3.

6. The protection control circuit for the large-size touch screen according to claim 5, wherein the filter circuit further comprises a capacitor C9;

one end of the capacitor C9 is connected to the capacitor C8, the 1 pin of the diode TVS3 and the inductor L2, and the other end is connected to the capacitor C8, the 2pin of the diode TVS3, the inductor L1 and the inductor L3.

7. The protection control circuit for the large-size touch screen according to claim 6, wherein the filter circuit further comprises a capacitor C10;

one end of the capacitor C10 is connected to the capacitor C7 and the inductor L2, and the other end is connected to the capacitor C7 and the inductor L3.

8. The protection control circuit for the large-size touch screen according to claim 7, wherein the power circuit further comprises a voltage stabilizing circuit, the voltage stabilizing circuit comprises a voltage stabilizing chip U2 and a capacitor C11;

the end point of the connection between the pin 1 and the pin 3 of the voltage stabilizing chip U2 is connected with the output end of the filter circuit, the pin 4 of the voltage stabilizing chip U2 is connected with the capacitor C11, the pin 2 of the voltage stabilizing chip U2 is connected with the capacitor C11 and then grounded, and the pin 5 of the voltage stabilizing chip U2 is the output end of the voltage stabilizing circuit.

9. The protection control circuit for the large-size touch screen according to claim 8, wherein the voltage stabilizing circuit further comprises a capacitor C12;

one end of the capacitor C12 is connected with the pin 1 and the pin 3 of the voltage stabilizing chip U2, and the other end of the capacitor C12 is connected with the pin 2 of the voltage stabilizing chip U2 and the capacitor C11.

10. The protection control circuit for the large-size touch screen according to claim 9, wherein the voltage stabilizing circuit further comprises a capacitor C13;

one end of the capacitor C13 is connected with the 5 pins of the voltage stabilizing chip U2, and the other end of the capacitor C13 is connected with the 2 pins of the capacitor C11, the capacitor C12 and the voltage stabilizing chip U2.