Infrared emission control circuit, touch screen and interactive tablet

Abstract

The utility model provides a kind of infrared emission control circuit, touch screen and interactive panel, circuit includes shift register and reset control module;The power supply connecting end of shift register is used to connect power supply;The first control signal output end of several of shift register is used to connect with several infrared emission module, the first control signal output end of several of shift register is used to output emission lamp control signal to several infrared emission module, and emission lamp control signal is used to control the working state of corresponding infrared emission module;The power input end of reset control module is used to connect power supply, and the reset signal output end of reset control module is connected with the reset end of shift register, and the reset signal output end of reset control module is used to output the reset control signal of the reset state of control shift register. Reset can be realized when power-on starting on infrared emission control circuit, and the safety of controlling several infrared emission modules by shift register is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of infrared emission control circuits, specifically to an infrared emission control circuit, a touch screen, and an interactive flat panel. Background Technology

[0002] In the infrared touch frame emission processing circuit, it is necessary to control the operation of several infrared emitting modules. Since the infrared emitting modules can only withstand a very small amount of DC current, they are generally driven by pulses to prevent damage to the modules. This also allows for control of the signal strength and rated power of the infrared emitting modules at a given moment.

[0003] In existing technology, the control module controls the shift register to output pulse signals to control the operation of several infrared emitting modules. However, since the control module and the shift register are powered on simultaneously in existing technology, the shift register cannot be properly controlled to output pulse signals before the control module sends a control signal to the shift register. That is, at this time, the shift register outputs signals based on the residual data from the last power failure. Therefore, the signal level output by the shift register is uncertain, which causes some infrared emitting modules to continue to conduct before the shift register receives the control signal. This results in some infrared emitting modules being subjected to current for a long time and burning out. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies in the prior art and provide an infrared emission control circuit, a touch screen, and an interactive flat panel that can reset the shift register when the infrared emission control circuit is powered on, thereby improving the security of controlling several infrared emission modules through the shift register.

[0005] One embodiment of this utility model provides an infrared emission control circuit, including: a shift register and a reset control module; the shift register includes a first power supply connection terminal, a plurality of first control signal output terminals and a reset terminal; the reset control module includes a power supply input terminal and a reset signal output terminal; The power connection terminal of the shift register is used to connect to the power supply; the several first control signal output terminals of the shift register are used to connect to several infrared emitting modules, and the several first control signal output terminals of the shift register are used to output emitting lamp control signals to the several infrared emitting modules, and the emitting lamp control signals are used to control the working state of the corresponding infrared emitting modules. The power input terminal of the reset control module is used to connect to the power supply, the reset signal output terminal of the reset control module is connected to the reset terminal of the shift register, and the reset signal output terminal of the reset control module is used to output a reset control signal to control the reset state of the shift register.

[0006] Compared to existing technologies, the infrared emission control circuit of this utility model includes: a shift register and a reset control module; the power connection terminal of the shift register is used to connect to a power supply; several first control signal output terminals of the shift register are used to connect to several infrared emission modules; the power input terminal of the reset control module is used to connect to the power supply, and the reset signal output terminal of the reset control module is connected to the reset terminal of the shift register; wherein, the reset signal output terminal of the reset control module is used to output a reset control signal to control the reset state of the shift register, and the several first control signal output terminals of the shift register are used to output emission lamp control signals to several infrared emission modules. The emission lamp control signals are used to control the working state of the corresponding infrared emission modules. Therefore, when the power supply starts to supply power, the reset control signal output by the reset control module causes the shift register to enter the reset state, thereby controlling the emission lamp control signals output by the several first control signal output terminals of the shift register, preventing the shift register from accidentally starting several infrared emission modules without receiving control instructions, and improving the safety of controlling several infrared emission modules through the shift register.

[0007] In one embodiment, the infrared emission control circuit further includes a control module, which includes a second power supply connection terminal and a second control signal output terminal; the shift register includes a first control signal input terminal. The second power supply connection terminal of the control module is connected to the power supply, and the second control signal output terminal of the control module is connected to the first control signal input terminal of the shift register. The second control signal of the control module is used to output register control signals to the shift register, and the register control signals are used to control the lamp control signals output by a plurality of first control signal output terminals of the shift register.

[0008] In this embodiment, by outputting the control signal of the control module, the lamp control signals output by several first control signal output terminals of the shift register can be smoothly controlled, so as to accurately control the working status of several infrared emitting modules.

[0009] In one implementation, the reset control module includes a delay resistor and a delay capacitor; the delay resistor includes a first terminal and a second terminal, and the delay capacitor includes a third terminal and a fourth terminal; The first end of the delay resistor is the power input terminal of the reset control module, the second end of the delay resistor is connected to the third end of the delay capacitor, the third end of the delay capacitor is the reset signal output terminal of the reset control module, and the fourth end of the delay capacitor is grounded.

[0010] In this embodiment, the RC delay circuit constructed based on the delay resistor and delay capacitor starts charging when the power supply starts. At this time, the reset terminal of the shift register receives a low level, resetting the shift register and thus controlling the output of the lamp control signal. After the delay capacitor has been charging for a period of time, the reset terminal of the shift register receives a high level, and the shift register normally outputs the lamp control signal, improving the safety of controlling several infrared emitting modules through the shift register.

[0011] In one implementation, the reset control module includes a delay chip and an adjustment capacitor; the delay chip includes a third power supply connection terminal, a timing connection terminal, and a level signal output terminal; The third power supply connection terminal of the delay chip is the power input terminal of the reset control module, the timing connection terminal of the delay chip is connected to the adjustment capacitor, and the level signal output terminal of the delay chip is the reset signal output terminal of the reset control module.

[0012] In this embodiment, based on the delay chip and the regulating capacitor, when the power supply starts, the regulating capacitor connected to the timing connection terminal of the delay chip begins to charge. At this time, the level signal output terminal of the delay chip outputs a low level, and the reset terminal of the shift register receives a low level, resetting the shift register and thus controlling the output of the lamp control signal from the shift register. After the regulating capacitor finishes charging, the level signal output terminal of the delay chip outputs a high level, and the reset terminal of the shift register receives a high level, allowing the shift register to normally control the output of the lamp control signal, thereby improving the safety of controlling multiple infrared emitting modules through the shift register.

[0013] In one embodiment, the plurality of infrared emitting modules each include an infrared emitting unit and a switching unit; the infrared emitting unit includes an electrical signal input terminal and an electrical signal output terminal; the switching unit includes a first connection terminal, a second connection terminal, and a unit driving terminal; The electrical signal input terminal of each infrared emitting unit is used to receive the light-emitting power supply, the electrical signal output terminal of each infrared emitting unit is connected to the first connection terminal of the corresponding switching unit, the second connection terminal of the switching unit is grounded, and the unit driving terminal of each switching unit is connected to the first control signal output terminal of the shift register one by one.

[0014] In this embodiment, the working state of the corresponding infrared emitting unit can be accurately controlled by controlling the conduction state of the branch where the infrared emitting unit is located through the switching unit.

[0015] In one embodiment, the infrared emitting unit is an infrared light-emitting diode; the anode of the infrared light-emitting diode is the electrical signal input terminal of the infrared emitting unit, and the cathode of the infrared light-emitting diode is the electrical signal output terminal of the infrared emitting unit.

[0016] In this embodiment, an infrared light-emitting diode is used as the infrared emitting unit. Infrared light-emitting diodes are small in size, have low power consumption, and have strong beam directivity, which can improve the accuracy of infrared emission direction.

[0017] In one implementation, the switching unit is a transistor, the collector of the transistor is the first connection terminal of the switching unit, the emitter of the transistor is the second connection terminal of the switching unit, and the base of the transistor is the unit driving terminal of the switching unit.

[0018] In this embodiment, a transistor is used as a switching unit, which can control the conduction state of the branch where the infrared emitting unit is located at low cost.

[0019] In one implementation, the switching unit is a field-effect transistor (FET), the drain of the FET is the first connection terminal of the switching unit, the source of the FET is the second connection terminal of the switching unit, and the collector of the FET is the unit driving terminal of the switching unit.

[0020] In this embodiment, a field-effect transistor is used as a switching unit, which can accurately control the conduction state of the branch where the infrared emitting unit is located.

[0021] In one implementation, the infrared emission control circuit further includes several current limiting modules; The shift register's several switch signal output terminals are connected to the unit drive terminals of the several infrared emitting modules via the several current limiting modules.

[0022] In this embodiment, the current received by the switching units of the infrared emitting modules can be limited by the current limiting modules, thereby improving the operational safety of the infrared emitting modules.

[0023] A second aspect of this application provides a touch screen, including: a display screen and an infrared emission control circuit as described above; Several infrared emitting modules connected to several first control signal output terminals of the shift register are arranged around the display screen, and the light emitted by the several infrared emitting modules covers the display screen.

[0024] A third aspect of this application provides an interactive flat panel, including: a flat panel body, a display screen, and an infrared emission control circuit as described above; The display screen is disposed on the outer surface of the tablet body. Several infrared emitting modules connected to several first control signal output terminals of the shift register are arranged around the display screen, and the light emitted by the several infrared emitting modules covers the display screen.

[0025] To provide a clearer understanding of this invention, the specific embodiments of the invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the module connection of an infrared emission control circuit according to an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the control module connection of an infrared emission control circuit according to one embodiment of the present invention.

[0028] Figure 3 This is a circuit diagram of an infrared emission control circuit according to an embodiment of the present invention.

[0029] Figure 4 This is a schematic diagram of the reset control module of the infrared emission control circuit according to one embodiment of the present invention.

[0030] Figure 5 This is a schematic diagram of a touch screen according to an embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of an interactive flat panel according to an embodiment of the present invention.

[0032] 100 Infrared emission control circuit; 110 Shift register; 130 Reset control module; 150 Control module; 170 Current limiting module; 200 Infrared emission module; 300 Touch screen; 310 Display screen; 400 Interactive flat panel. Detailed Implementation

[0033] 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.

[0034] In existing technology, the control module controls the pulse signal output by the shift register to control the operation of several infrared emitting modules. However, since the control module and the shift register are powered on simultaneously, the shift register cannot be properly controlled to output pulse signals before the control module sends a control signal to the shift register. That is, at this time, the shift register outputs signals based on the residual data from the last power failure. Therefore, the signal level output by the shift register is uncertain, which causes some infrared emitting modules to continue to conduct before the shift register receives the control signal. This results in some infrared emitting modules being subjected to current for a long time, leading to burnout.

[0035] This application is based on the circuit structure of the reset control module 130 connected to the reset terminal of the shift register 110. When the power supply starts, the reset control signal output by the reset control module 130 causes the shift register 110 to enter the reset state, thereby controlling several first control signal output terminals of the shift register 110 to stop outputting the lamp control signal. This can prevent the shift register 110 from accidentally starting several infrared emitting modules 200 without receiving control instructions, thus improving the safety of controlling several infrared emitting modules 200 through the shift register 110.

[0036] Please see Figure 1 This is a schematic diagram of an infrared emission control circuit according to an embodiment of the present invention. The infrared emission control circuit 100 includes: a shift register 110 and a reset control module 130; the shift register 110 includes a first power supply connection terminal, a plurality of first control signal output terminals and a reset terminal; the reset control module 130 includes a power supply input terminal and a reset signal output terminal. The power connection terminal of the shift register 110 is used to connect to the power supply; several first control signal output terminals of the shift register 110 are used to connect to several infrared emitting modules 200, and several first control signal output terminals of the shift register 110 are used to output emitting lamp control signals to several infrared emitting modules 200, and the emitting lamp control signals are used to control the working state of the corresponding infrared emitting module 200. The power input terminal of the reset control module 130 is used to connect to the power supply, the reset signal output terminal of the reset control module 130 is connected to the reset terminal of the shift register 110, and the reset signal output terminal of the reset control module 130 is used to output a reset control signal to control the reset state of the shift register 110.

[0037] Shift register 110 is a key sequential logic component in digital circuits, primarily used for data shifting, storage, and conversion operations. Its core function is to shift binary data bit by bit in a specified direction in response to received register control signals, thereby changing the outputs of several first control signal output terminals of shift register 110 in response to the register control signals. One of these registers can be a 74HC164.

[0038] The reset control module 130 is a circuit module used to output a first-level reset control signal to the reset terminal of the shift register 110 when the power supply starts, and to output a second-level reset control signal to the reset terminal of the shift register 110 after the power supply has been running for a period of time, so as to control the reset state of the shift register 110. The first and second levels are opposite levels; for example, the first level is low and the second level is high.

[0039] The circuit working principle of this embodiment is as follows: When the power supply starts, the power connection terminal of the shift register 110 receives the power signal, and the shift register 110 is powered on and started. At the same time, the power input terminal of the reset control module 130 also receives the power signal, causing the reset signal output terminal of the reset control module 130 to output a first-level reset control signal. Therefore, at the same time as the shift register 110 is powered on and started, the reset terminal of the shift register 110 receives the first-level reset control signal, causing the shift register 110 to enter the reset state, clearing the data record of the shift register 110, and causing several first control signal output terminals of the shift register 110 to stop outputting the lamp control signal to several infrared emitting modules 200. This allows several infrared emitting modules 200 to be in a stable non-emitting working state for a short period of time after the shift register 110 is powered on and started. After the power supply has been running for a period of time, the reset signal output terminal of the reset control module 130 outputs a second-level reset control signal. The reset terminal of the shift register 110 receives the second-level reset control signal, causing the shift register 110 to exit the reset state. The shift register 110 can respond to the received register control signal and normally control several first control signal output terminals to output lamp control signals to several infrared emitting modules 200, so that several infrared emitting modules 200 can normally respond to the lamp control signals to switch between emitting light and not emitting light working states.

[0040] Compared to existing technologies, the infrared emission control circuit 100 of this utility model includes: a shift register 110 and a reset control module 130; the power supply connection terminal of the shift register 110 is used to connect to a power supply; several first control signal output terminals of the shift register 110 are used to connect to several infrared emission modules 200; the power input terminal of the reset control module 130 is used to connect to a power supply, and the reset signal output terminal of the reset control module 130 is connected to the reset terminal of the shift register 110; wherein, the reset signal output terminal of the reset control module 130 is used to output a reset control signal controlling the reset state of the shift register 110, and the shift register 110... The first control signal output terminals are used to output lamp control signals to several infrared emitting modules 200. The lamp control signals are used to control the working state of the corresponding infrared emitting modules 200. Therefore, when the power supply starts to supply power, the reset control signal output by the reset control module 130 causes the shift register 110 to enter the reset state, thereby controlling the lamp control signals output by the first control signal output terminals of the shift register 110. This prevents the shift register 110 from accidentally starting several infrared emitting modules 200 without receiving control instructions, thus improving the safety of controlling several infrared emitting modules 200 through the shift register 110.

[0041] Please see Figure 2 In one feasible embodiment, the infrared emission control circuit 100 further includes a control module 150, which includes a second power connection terminal and a second control signal output terminal; the shift register 110 includes a first control signal input terminal; The second power supply connection terminal of the control module 150 is connected to the power supply, and the second control signal output terminal of the control module 150 is connected to the first control signal input terminal of the shift register 110. The second control signal of the control module 150 is used to output the register control signal to the shift register 110. The register control signal is used to control the lamp control signals output by several first control signal output terminals of the shift register 110.

[0042] Among them, the control module 150 can be an MCU (Microcontroller Unit). An MCU is a microcomputer system that integrates a central processing unit, memory and peripheral interfaces on a single chip and is widely used in the field of embedded device control.

[0043] In this embodiment, by outputting register control signals through control module 150, the emitter control signals output by several first control signal output terminals of shift register 110 can be smoothly controlled, so as to accurately control the working status of several infrared emitting modules 200.

[0044] Please see Figure 3In one feasible embodiment, the reset control module 130 includes a delay resistor R3 and a delay capacitor C3; the delay resistor R3 includes a first terminal and a second terminal, and the delay capacitor C3 includes a third terminal and a fourth terminal; The first end of the delay resistor R3 is the power input terminal of the reset control module 130. The second end of the delay resistor R3 is connected to the third end of the delay capacitor C3. The third end of the delay capacitor C3 is the reset signal output terminal of the reset control module 130. The fourth end of the delay capacitor C3 is grounded.

[0045] In this embodiment, the RC delay circuit constructed based on the delay resistor R3 and the delay capacitor C3 starts charging when the power supply starts. At this time, the reset terminal of the shift register 110 receives a low level, resetting the shift register 110 and thus controlling the output of the lamp control signal. After the delay capacitor C3 has been charging for a period of time, the reset terminal of the shift register 110 receives a high level, and the shift register 110 normally outputs the lamp control signal, improving the safety of controlling several infrared emitting modules 200 through the shift register 110.

[0046] The duration of the reset control signal output by the reset control module 130 at the first level can be determined based on the parameters of the two components, the delay resistor R3 and the delay capacitor C3. The duration of the reset control signal at the first level is positively correlated with the parameters of the delay resistor R3 and the delay capacitor C3.

[0047] Please see Figure 4 In one feasible embodiment, the reset control module 130 includes a delay chip and an adjustment capacitor; the delay chip includes a third power supply connection terminal, a timing connection terminal, and a level signal output terminal; The third power supply connection terminal of the delay chip is the power input terminal of the reset control module 130, the timing connection terminal of the delay chip is connected to the adjustment capacitor, and the level signal output terminal of the delay chip is the reset signal output terminal of the reset control module 130.

[0048] Among them, delay chips such as Figure 4 As shown in U6, an SGM804 chip can be used, and the adjusting capacitor can be a parallel capacitor, for example... Figure 4 The capacitors C148 and C39 are in the middle.

[0049] In this embodiment, based on the delay chip and the regulating capacitor, when the power supply starts, the regulating capacitor connected to the timing connection terminal of the delay chip begins to charge. At this time, the level signal output terminal of the delay chip outputs a low level, and the reset terminal of the shift register 110 receives a low level, resetting the shift register 110 and thus controlling the output of the lamp control signal by the shift register 110. After the regulating capacitor finishes charging, the level signal output terminal of the delay chip outputs a high level, and the reset terminal of the shift register 110 receives a high level, allowing the shift register 110 to normally control the output of the lamp control signal, thereby improving the safety of controlling several infrared emitting modules 200 through the shift register 110.

[0050] In other embodiments, the reset control module 130 may also employ other delay circuits, such as a 555 timer, a CMOS delay circuit, etc., that can output a first-level reset control signal to the reset terminal of the shift register 110 when the power supply starts to supply power, and output a second-level reset control signal to the reset terminal of the shift register 110 after the power supply has been supplied for a period of time.

[0051] In one feasible embodiment, several infrared emitting modules each include an infrared emitting unit and a switching unit; the infrared emitting unit includes an electrical signal input terminal and an electrical signal output terminal; the switching unit includes a first connection terminal, a second connection terminal and a unit driving terminal; The electrical signal input terminal of each infrared emitting unit is used to receive the light-emitting power supply. The electrical signal output terminal of each infrared emitting unit is connected to the first connection terminal of the corresponding switching unit. The second connection terminal of the switching unit is grounded. The unit driving terminal of each switching unit is connected to the first control signal output terminal of the shift register 110 in a one-to-one correspondence.

[0052] When the switching unit receives the lamp control signal, the first and second connection terminals of the switching unit are connected, making the branch where the corresponding infrared emitting unit is located a closed circuit. The current output by the light-emitting power supply can flow to ground through the infrared emitting unit and the switching unit. At this time, the infrared emitting unit enters the light-emitting working state. When the switching unit does not receive the lamp control signal, the first and second connection terminals of the switching unit are disconnected, making the branch where the corresponding infrared emitting unit is located an open circuit. At this time, the infrared emitting unit enters the non-light-emitting working state.

[0053] In this embodiment, the working state of the corresponding infrared emitting unit can be accurately controlled by controlling the conduction state of the branch where the infrared emitting unit is located through the switching unit.

[0054] In one feasible embodiment, the infrared emitting unit is an infrared light-emitting diode; the anode of the infrared light-emitting diode is the electrical signal input terminal of the infrared emitting unit, and the cathode of the infrared light-emitting diode is the electrical signal output terminal of the infrared emitting unit.

[0055] like Figure 3 or Figure 4 As shown, infrared light-emitting diodes include at least IR1, IR2, IR3, etc.

[0056] In this embodiment, an infrared light-emitting diode is used as the infrared emitting unit. Infrared light-emitting diodes are small in size, have low power consumption, and have strong beam directionality, which can improve the accuracy of infrared emission direction.

[0057] In one feasible embodiment, the switching unit is a transistor, the collector of the transistor is the first connection terminal of the switching unit, the emitter of the transistor is the second connection terminal of the switching unit, and the base of the transistor is the unit driving terminal of the switching unit.

[0058] An NPN transistor can be used as the switching unit. For example... Figure 3 or Figure 4 As shown, NPN transistors include at least QT1, QT2, QT3, etc.

[0059] In this embodiment, a transistor is used as a switching unit, which can control the conduction state of the branch where the infrared emitting unit is located at low cost.

[0060] In one feasible embodiment, the switching unit is a field-effect transistor (FET), the drain of the FET is the first connection terminal of the switching unit, the source of the FET is the second connection terminal of the switching unit, and the collector of the FET is the unit driving terminal of the switching unit.

[0061] NMOS transistors can be used as switching units.

[0062] In this embodiment, a field-effect transistor is used as a switching unit, which can accurately control the conduction state of the branch where the infrared emitting unit is located.

[0063] In one feasible embodiment, the infrared emission control circuit 100 further includes several current limiting modules 170; Several switch signal output terminals of shift register 110 are connected to the unit drive terminals of the switch units of several infrared emitting modules 200 via several current limiting modules 170.

[0064] The current limiting module 170 can be a current-limiting resistor. When the lamp control signals output from several switch signal output terminals of the shift register 110 are transmitted to the unit drive terminal of the switching unit of the infrared emitting module 200 through the current limiting module 170, the current limiting module 170 can limit the current magnitude received by the unit drive terminal of the switching unit, preventing excessive current from damaging the switching unit. Figure 3 or Figure 4 As shown, the current-limiting resistors include at least RB1, RB2, RB3, etc.

[0065] In this embodiment, by using several current limiting modules 170, the current received by the switching units of several infrared emitting modules 200 can be limited, thereby improving the operational safety of the several infrared emitting modules 200.

[0066] Please see Figure 5 The second aspect of this application provides a touch screen 300, including: a display screen 310 and an infrared emission control circuit 100 as described above; Several infrared emitting modules connected to several first control signal output terminals of shift register 110 are arranged around the display screen 310, and the light emitted by the several infrared emitting modules covers the display screen 310.

[0067] Please see Figure 6 The third aspect of this application provides an interactive flat panel 400, including: a flat panel body, a display screen, and an infrared emission control circuit 100 as described above; The display screen is placed on the outer surface of the tablet body. Several infrared emitting modules connected to several first control signal output terminals of the shift register 110 are arranged around the display screen, and the light emitted by the infrared emitting modules covers the display screen.

[0068] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An infrared emission control circuit, characterized in that, include: A shift register and a reset control module; the shift register includes a first power supply connection terminal, several first control signal output terminals, and a reset terminal; the reset control module includes a power supply input terminal and a reset signal output terminal; The power connection terminal of the shift register is used to connect to the power supply; the several first control signal output terminals of the shift register are used to connect to several infrared emitting modules, and the several first control signal output terminals of the shift register are used to output emitting lamp control signals to the several infrared emitting modules, and the emitting lamp control signals are used to control the working state of the corresponding infrared emitting modules. The power input terminal of the reset control module is used to connect to the power supply, the reset signal output terminal of the reset control module is connected to the reset terminal of the shift register, and the reset signal output terminal of the reset control module is used to output a reset control signal to control the reset state of the shift register.

2. The infrared emission control circuit according to claim 1, characterized in that: The reset control module includes a delay resistor and a delay capacitor; the delay resistor includes a first terminal and a second terminal, and the delay capacitor includes a third terminal and a fourth terminal; The first end of the delay resistor is the power input terminal of the reset control module, the second end of the delay resistor is connected to the third end of the delay capacitor, the third end of the delay capacitor is the reset signal output terminal of the reset control module, and the fourth end of the delay capacitor is grounded.

3. The infrared emission control circuit according to claim 1, characterized in that: The reset control module includes a delay chip and an adjustment capacitor; the delay chip includes a third power supply connection terminal, a timing connection terminal, and a level signal output terminal; The third power supply connection terminal of the delay chip is the power input terminal of the reset control module, the timing connection terminal of the delay chip is connected to the adjustment capacitor, and the level signal output terminal of the delay chip is the reset signal output terminal of the reset control module.

4. The infrared emission control circuit according to any one of claims 1 to 3, characterized in that: The infrared emission control circuit further includes a control module, which includes a second power connection terminal and a second control signal output terminal; the shift register includes a first control signal input terminal. The second power supply connection terminal of the control module is connected to the power supply, and the second control signal output terminal of the control module is connected to the first control signal input terminal of the shift register. The second control signal of the control module is used to output register control signals to the shift register, and the register control signals are used to control the lamp control signals output by a plurality of first control signal output terminals of the shift register.

5. The infrared emission control circuit according to any one of claims 1 to 3, characterized in that: The plurality of infrared emitting modules each include an infrared emitting unit and a switching unit; the infrared emitting unit includes an electrical signal input terminal and an electrical signal output terminal; the switching unit includes a first connection terminal, a second connection terminal and a unit driving terminal; The electrical signal input terminal of each infrared emitting unit is used to receive the light-emitting power supply, the electrical signal output terminal of each infrared emitting unit is connected to the first connection terminal of the corresponding switching unit, the second connection terminal of the switching unit is grounded, and the unit driving terminal of each switching unit is connected to the first control signal output terminal of the shift register one by one.

6. The infrared emission control circuit according to claim 5, characterized in that: The infrared emitting unit is an infrared light-emitting diode; the anode of the infrared light-emitting diode is the electrical signal input terminal of the infrared emitting unit, and the cathode of the infrared light-emitting diode is the electrical signal output terminal of the infrared emitting unit.

7. The infrared emission control circuit according to claim 5, characterized in that: The switching unit is a transistor, the collector of the transistor is the first connection terminal of the switching unit, the emitter of the transistor is the second connection terminal of the switching unit, and the base of the transistor is the unit driving terminal of the switching unit.

8. The infrared emission control circuit according to claim 5, characterized in that: The switching unit is a field-effect transistor (FET), the drain of the FET is the first connection terminal of the switching unit, the source of the FET is the second connection terminal of the switching unit, and the collector of the FET is the unit driving terminal of the switching unit.

9. The infrared emission control circuit according to claim 5, characterized in that: The infrared emission control circuit also includes several current limiting modules; The shift register's several switch signal output terminals are connected to the unit drive terminals of the several infrared emitting modules via the several current limiting modules.

10. A touchscreen, characterized in that, include: The display screen and the infrared emission control circuit as described in any one of claims 1 to 9; Several infrared emitting modules connected to several first control signal output terminals of the shift register are arranged around the display screen, and the light emitted by the several infrared emitting modules covers the display screen.

11. An interactive flat panel, characterized in that, Includes: a tablet body, a display screen, and an infrared emission control circuit as described in any one of claims 1 to 9; The display screen is disposed on the outer surface of the tablet body. Several infrared emitting modules connected to several first control signal output terminals of the shift register are arranged around the display screen, and the light emitted by the several infrared emitting modules covers the display screen.

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