Thin film transistor (TFT) and light-emitting diode (LED) touch display module

Abstract

The utility model discloses a TFT (thin film transistor) and LED (light-emitting diode) touch display module, and belongs to the technical field of electronics. Aiming at the conditions that the display effect of the LED display module is limited, the cost of the color screen module is high and the like, not only can the simple dynamic display effect be met, but also the display effect of an LED screen can be met, and different display pictures can be switched through the touch control spring; the touch display module comprises a TFT drive circuit module, an LED drive circuit module, a touch control circuit, a FLASH circuit, a buzzer circuit, a serial port circuit, a backlight circuit and a power supply circuit module, the TFT drive circuit module comprises a TFT drive circuit and a screen interface circuit, and the LED drive circuit comprises a key lamp circuit and a lamp strip circuit. According to the utility model, a better visual effect and better user experience are brought, and meanwhile, the system has the characteristics of low cost, cool effect, strong reliability and the like, and can be widely applied to the fields of household appliances, medical treatment, industry and the like.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a TFT+LED touch display module. Background Art

[0002] TFT liquid crystal display technology is a liquid crystal display technology that uses thin film transistors as pixel controls. TFT liquid crystal display has the advantages of high resolution, bright colors, and wide viewing angle, so it is widely used in display screens of various electronic devices; LED backlight technology is a display technology that uses LED as a backlight source. LED backlight has the characteristics of high efficiency, low energy consumption, and long life. Compared with traditional cold cathode fluorescent lamp backlight, LED backlight has better color performance and more uniform brightness distribution.

[0003] With the progress of the current society, the display panels in the home appliance industry are becoming more and more abundant, LED display screens are becoming more and more cool and people's requirements for them are gradually increasing. Some dynamic effects and display interfaces cannot be achieved with LED display modules; TFT color screen display modules can meet various complex dynamic display effects and have better user experience, but the cost of this module is very high, which means that it can only be used in some high-end products. Utility Model Content

[0004] The purpose of the utility model is to provide a TFT+LED touch display module to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a TFT+LED touch display module, the touch display module comprising: a TFT drive circuit module, an LED drive circuit module, a touch control circuit, a FLASH circuit, a buzzer circuit, a serial port circuit, a backlight circuit and a power supply circuit module;

[0006] The TFT driving circuit is electrically connected to the screen interface circuit, the key light circuit, the light bar circuit, the touch control circuit, the FLASH circuit, the buzzer circuit, the serial port circuit, the backlight circuit and the power supply circuit through the chip U3.

[0007] The TFT driving circuit is connected to the CON4 terminal of the screen interface circuit through an FPC cable;

[0008] The TFT driving circuit module includes a TFT driving circuit and a screen interface circuit; the LED driving circuit module includes a key light circuit and a light bar circuit; the power circuit module includes a power circuit and a communication interface circuit.

[0009] The TFT driving circuit includes a chip U3, a capacitor C11, a resistor R32 and a connector C0N3; the chip U3 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21, pin 22, pin 23, pin 24, pin 25, pin 26, pin 27, pin 28, pin 29, pin 30, pin 31, pin 32, pin 33, pin 34, pin 35, pin 36 and pin 37; the connector C0N3 includes pin 1, pin 2, pin 3 and pin 4;

[0010] Pin 6 of the chip U3 is electrically connected to the power supply VCC3V3, one end of the pin 7 of the chip U3 is grounded, pin 10 of the chip U3 is electrically connected to the resistor R32 and the capacitor C11, the resistor R32 and the capacitor C11 are connected in parallel, one end of the resistor R32 is electrically connected to the power supply VCC3V3, one end of the capacitor C11 is grounded, the pins 13 and 14 are electrically connected to the inside of the chip, the pin 1 of the connector CON3 is electrically connected to the power supply, the pins 2 and 3 of the connector CON3 are electrically connected to the signal line, and the pin 4 of the connector CON3 is grounded;

[0011] The screen interface circuit connector CON4 is connected to the TFT driving circuit through an FPC cable, and the screen interface circuit includes a circuit board FPC-05-20P, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38 and a resistor R39; the circuit board FPC-05-20P includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21 and pin 22;

[0012] Pin 1 of the circuit board FPC-05-20P is electrically connected to the power supply VCC3V3, pin 2 of the circuit board FPC-05-20P is grounded, pin 3 of the circuit board FPC-05-20P is electrically connected to resistor R33 and resistor R34, the resistor R33 is connected in parallel with the resistor R34, and the other end of the resistor R33 is connected to the power supply VCC3C3, and the other end of the resistor R34 is grounded, pin 4 of the circuit board FPC-05-20P is electrically connected to resistor R35, and the circuit board FPC-05-20P Pin 5 is electrically connected to resistor R36, pin 6 of the circuit board FPC-05-20P is electrically connected to resistor R37, pin 7 of the circuit board FPC-05-20P is electrically connected to the inside of the circuit board, pin 8 of the circuit board FPC-05-20P is electrically connected to resistor R38, pin 9 of the circuit board FPC-05-20P is electrically connected to resistor R39, pin 18 of the circuit board FPC-05-20P is grounded, and pins 21 and 22 of the circuit board FPC-05-20P are grounded in parallel.

[0013] The TFT driving circuit is electrically connected to the key light circuit and the light bar circuit through the pins PF1, PF0, PC15, PC14, PB7, PB8, PB9, PA15 and PD0 of the chip U3;

[0014] The key light circuit includes a power supply VCC5V, a resistor R49, a resistor R50, a resistor 51, a resistor 52, a resistor 53, a resistor 54, a resistor 55, a resistor 56, a resistor 57, a resistor 58, a resistor 59, a resistor 60, a resistor 61, a resistor 62, a resistor 63, a resistor 64, a resistor 65, a resistor 66, a resistor 67, a light emitting diode A1, a light emitting diode A2, a light emitting diode A3, a light emitting diode A4, a light emitting diode B1, a light emitting diode H1, a light emitting diode H2, a transistor Q9, a transistor Q10, a transistor Q11, a transistor Q12, and a transistor Q13;

[0015] The resistor R49, the light emitting diode A1, the transistor Q15 and the resistor R62 are connected in series, and the resistor R69 is connected in parallel with the transistor Q15; the resistor R50, the light emitting diode A2, the transistor Q14 and the resistor R61 are connected in series, and the resistor R68 is connected in parallel with the transistor Q14; the resistor R51, the light emitting diode A3, the transistor Q13 and the resistor R60 are connected in series, and the resistor R67 is connected in parallel with the transistor Q13; the resistor R52, the light emitting diode A4, the transistor Q12 and The resistor R59 is connected in series, and the resistor R66 is connected in parallel with the transistor Q12; the resistor R53, the diode B1, the transistor Q11 and the resistor R58 are connected in series, and the resistor R65 is connected in parallel with the transistor Q11; the resistor R54, the diode H1, the transistor Q10 and the resistor R57 are connected in series, and the resistor R64 is connected in parallel with the transistor Q10; the resistor R55, the light-emitting diode H2, the transistor Q9 and the resistor R56 are connected in series, and the resistor R63 is connected in parallel with the transistor Q9;

[0016] The light bar circuit includes a resistor R14, a resistor R15, a resistor 16, a resistor R46, a resistor R47, a resistor R48, a light emitting diode B2, a light emitting diode B3, a light emitting diode B4, a light emitting diode H3, a light emitting diode H4, a light emitting diode H5, a transistor Q1 and a transistor Q8;

[0017] The resistors R46, R47 and transistor Q8 are connected in series, the light-emitting diodes H3, H4 and H5 are connected in parallel, and the transistor Q8 is connected in parallel with the resistor R48; the resistors R16, R14 and transistor Q1 are connected in series, the light-emitting diodes B2, B3 and B4 are connected in parallel, and the transistor Q1 is connected in parallel with the resistor R15.

[0018] The TFT driving circuit is electrically connected to the touch control circuit via the pins SWCLK and SWDIO of the chip U3;

[0019] The touch control circuit includes a chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a capacitor C5, an ESD diode D5, a connector CON2 and a touch button, wherein the connector CON2 includes a pin 1, a pin 2, a pin 3 and a pin 4; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7, a pin 8, a pin 9, a pin 10, a pin 11, a pin 12, a pin 13, a pin 14, a pin 15 and a pin 16;

[0020] Pin 1 of the chip U1 is electrically connected to resistor R5, pin 2 of the chip U1 is electrically connected to resistor R6, pin 3 of the chip U1 is electrically connected to resistor R3, pin 4 of the chip U1 is electrically connected to resistor R4, pin 7 of the chip U1 is electrically connected to capacitor C4, capacitor C5 and ESD diode D5, the capacitor C4, capacitor C5 and ESD diode D5 are connected in parallel, one end of the capacitor C4, capacitor C5 and ESD diode D5 is grounded, and one end is connected to power supply VCCV3, pin 9 of the chip U1 is electrically connected to resistor R1, pin 13 of the chip U1 is electrically connected to resistor R2, and pin 15 of the chip U1 is electrically connected to resistor R7; pin 1 of the connector CON2 is electrically connected to the power supply, pins 2 and pin 3 of the connector CON2 are electrically connected to the signal line, and pin 4 of the connector CON2 is grounded.

[0021] The TFT driving circuit is electrically connected to the FLASH circuit through the pins FLASH CS, FLASH WP, FLASH DI, FLASH DO and FLASH CLK of the chip U3;

[0022] The FLASH circuit includes a chip U1, a resistor R20, a resistor R21, a resistor R22, a capacitor C6, a capacitor C7 and a capacitor C8; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8;

[0023] Pin 1 of the chip U1 is electrically connected to resistor R20, pin 3 of the chip U1 is electrically connected to resistor R21, pin 7 of the chip U1 is electrically connected to resistor R22, the resistors R20, R21 and R22 are connected in parallel to each other and connected to the power supply VCC3VC, pin 4 of the chip U1 is grounded, pin 6 of the chip U1 is electrically connected to capacitor C8, one section of the capacitor C8 is grounded, pin 8 of the chip U1 is electrically connected to capacitor C7 and capacitor C6, the capacitor C7 and capacitor C6 are connected in parallel, one end of the capacitor C7 and capacitor C6 is grounded, and the other end is electrically connected to the power supply VCC3V3.

[0024] The TFT driving circuit controls the buzzer circuit via the pins PB6 and PB10 of the chip U3;

[0025] The buzzer circuit includes a low frequency port BUZ2, a resistor 23, a resistor 24, a resistor 25, a resistor 26, a resistor 27, a resistor 28, a resistor 29, a resistor 30, a resistor 31, a capacitor C12, a transistor Q5, a transistor Q6 and a transistor Q7;

[0026] The resistor R31, the resistor R29 and the transistor Q5 are connected in series, the resistor R30 and the transistor Q5 are connected in series, the resistor R23, the resistor R24, the resistor R25, the resistor R26 and the capacitor C12 are connected in series, the resistor R23, the resistor R27, the transistor Q6 and the transistor Q7 are connected in series, the resistor R28 and the transistor Q7 are connected in series, one end of the resistor R28 and the transistor Q7 are electrically connected to the power supply VCC5V, one end of the transistor Q6 and the resistor R25 are grounded, and one end of the transistor Q5 and the resistor R30 are grounded.

[0027] The TFT driving circuit is electrically connected to the serial port circuit via pins PA2 and PA3 of chip U3;

[0028] The serial port circuit includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an ESD diode D3, an ESD diode D4, a capacitor C16, a capacitor C17, a diode Q2, and a varactor diode Q3;

[0029] The resistor R9 is connected in parallel with the resistor R13, one end of the resistor R13 is electrically connected to the power supply VCC5V, one end of the ESD diode D4 is grounded, one end of the capacitor C17 is grounded, and the diode Q2 is connected in series with the resistor R12; the resistor R8 is connected in parallel with the capacitor C16, the resistor R8 is connected in parallel with the ESD diode D3, the resistor R8 is connected in parallel with the varactor diode Q3, one end of the ESD diode D3 is grounded, one end of the capacitor C16 is grounded, the resistor R10 is connected in parallel with the resistor R11, the serial port circuit is connected in series with the resistor R40 through the MCU RX, and the serial port circuit is connected in series with the resistor R41 through the MCU TX.

[0030] The TFT driving circuit controls the backlight circuit via the pin PA4 of the chip U3;

[0031] The backlight circuit includes an LEDA pin, an LEDK pin, a resistor R17, a resistor R18, a resistor R19, a resistor R45 and a transistor Q4;

[0032] The resistor R19 is connected in parallel with the resistor R45, the resistor R18 is connected in parallel with the transistor Q4, the resistor R18 is connected in parallel with the resistor R17, the LEDA pin of the backlight circuit is connected to the power supply VCC5V, and the LEDK pin of the backlight circuit is grounded.

[0033] The power supply circuit is used to supply power to the TFT driving circuit and the screen interface circuit; the output end of the power supply circuit is connected to the input end of the communication interface circuit;

[0034] The power supply circuit includes a chip U4, a resistor R42, a resistor R43, a resistor R44, a capacitor C18, a capacitor C19, a capacitor C20, and a capacitor C21; the chip U4 includes a pin 1, a pin 2, a pin 3, and a pin 4;

[0035] Pin 1 of the chip U4 is electrically connected to power supply VCC5V, pin 2 of the chip U4 is grounded, pin 3 of the chip U4 is electrically connected to resistor R42, pin 4 of the chip U4 is electrically connected to resistor R43, resistor R44 and capacitor C18, the resistor R44 and capacitor C18 are connected in parallel, one end of the resistor R43 is grounded, pin 5 of the chip U4 is electrically connected to capacitor C19, capacitor C20 and capacitor C21, the capacitor C19, capacitor C20 and capacitor C21 are connected in parallel, pin 5 of the chip U4 is electrically connected to power supply VCCV3, one end of the capacitor C19, capacitor C20 and capacitor C21 is grounded;

[0036] The communication interface circuit includes a connector CON1, a TVS tube D1, a voltage regulator tube D2, a capacitor C1, a capacitor C2 and a capacitor C3, and the connector CON1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5 and a pin 6;

[0037] Pin 1 and pin 6 of the connector CON1 are grounded, pin 2 of the connector CON1 is electrically connected to the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3, the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel, pin 2 of the connector CON1 is electrically connected to the power supply VCC5V, one end of the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3 are grounded, pin 3 of the connector CON1 indicates customer reception, pin 4 of the connector CON1 indicates customer transmission, and pin 5 of the connector CON1 is grounded.

[0038] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0039] 1. Aiming at the limitation of the display effect of LED display module and the high cost of color screen module, the utility model designs a TFT+LED touch display module, which can satisfy both simple dynamic display effect and LED screen display effect, and can also switch different display images through touch spring. Compared with TFT display module with TP, this design has great cost advantage, but the display effect cannot achieve the many dynamic effects of TFT display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] 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:

[0041] Figure 1 This is a TFT driving circuit diagram of a TFT+LED touch display module of the utility model;

[0042] Figure 2 This is a screen interface circuit diagram of a TFT+LED touch display module of the utility model;

[0043] Figure 3 This is a key light circuit diagram of a TFT+LED touch display module of the utility model;

[0044] Figure 4 This is a light bar circuit diagram of a TFT+LED touch display module of the utility model;

[0045] Figure 5 This is a touch control circuit diagram of a TFT+LED touch display module of the utility model;

[0046] Figure 6 This is a FLASH circuit diagram of a TFT+LED touch display module of the utility model;

[0047] Figure 7 This is a buzzer circuit diagram of a TFT+LED touch display module of the utility model;

[0048] Figure 8 This is a serial port circuit diagram of a TFT+LED touch display module of the utility model;

[0049] Fig. 9 This is a backlight circuit diagram of a TFT+LED touch display module of the utility model;

[0050] Fig.10 The utility model discloses a power supply circuit and a communication interface circuit diagram of a TFT+LED touch display module. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0052] See also Figure 1-Figure 10The utility model provides a technical solution: a TFT+LED touch display module, the touch display module includes: a TFT drive circuit module, an LED drive circuit module, a touch control circuit, a FLASH circuit, a buzzer circuit, a serial port circuit, a backlight circuit and a power circuit module; the TFT drive circuit module includes a TFT drive circuit and a screen interface circuit; the LED drive circuit module includes a key light circuit and a light bar circuit; the power circuit module includes a power circuit and a communication interface circuit;

[0053] The TFT driving circuit is electrically connected to the screen interface circuit, key light circuit, light bar circuit, touch control circuit, FLASH circuit, buzzer circuit, serial port circuit, backlight circuit and power supply circuit through chip U3.

[0054] The TFT drive circuit is connected to the CON4 terminal of the screen interface circuit through the FPC cable;

[0055] The TFT driving circuit includes a chip U3, a capacitor C11, a resistor R32 and a connector C0N3; the chip U3 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21, pin 22, pin 23, pin 24, pin 25, pin 26, pin 27, pin 28, pin 29, pin 30, pin 31, pin 32, pin 33, pin 34, pin 35, pin 36 and pin 37; the connector C0N3 includes pin 1, pin 2, pin 3 and pin 4;

[0056] Pin 6 of chip U3 is electrically connected to power supply VCC3V3, one end of pin 7 of chip U3 is grounded, pin 6 of chip U3 is electrically connected to power supply VCC3V3, pin 10 of chip U3 is electrically connected to resistor R32 and capacitor C11, resistor R32 and capacitor C11 are connected in parallel, one end of resistor R32 is electrically connected to power supply VCC3V3, one end of capacitor C11 is grounded, pin 13 and pin 14 are electrically connected to the inside of the chip, pin 1 of connector CON3 is electrically connected to the power supply, pin 2 and pin 3 of connector CON3 are electrically connected to the signal line, and pin 4 of connector CON3 is grounded;

[0057] The screen interface circuit connector CON4 is connected to the TFT driving circuit through an FPC cable. The screen interface circuit includes a circuit board FPC-05-20P, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38, and a resistor R39; the circuit board FPC-05-20P includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21, and pin 22;

[0058] Pin 1 of the circuit board FPC-05-20P is electrically connected to the power supply VCC3V3, pin 2 of the circuit board FPC-05-20P is grounded, pin 3 of the circuit board FPC-05-20P is electrically connected to resistor R33 and resistor R34, resistor R33 and resistor R34 are connected in parallel, and the other end of resistor R33 is connected to the power supply VCC3C3, the other end of resistor R34 is grounded, pin 4 of the circuit board FPC-05-20P is electrically connected to resistor R35, and the circuit board FPC-05-20P Pin 5 is electrically connected to resistor R36, pin 6 of circuit board FPC-05-20P is electrically connected to resistor R37, pin 7 of circuit board FPC-05-20P is electrically connected to the inside of the circuit board, pin 8 of circuit board FPC-05-20P is electrically connected to resistor R38, pin 9 of circuit board FPC-05-20P is electrically connected to resistor R39, pin 18 of circuit board FPC-05-20P is grounded, and pins 21 and 22 of circuit board FPC-05-20P are grounded in parallel.

[0059] The TFT driving circuit is electrically connected to the key light circuit and the light bar circuit through the pins PF1, PF0, PC15, PC14, PB7, PB8, PB9, PA15 and PD0 of the chip U3;

[0060] The key light circuit includes a power supply VCC5V, a resistor R49, a resistor R50, a resistor 51, a resistor 52, a resistor 53, a resistor 54, a resistor 55, a resistor 56, a resistor 57, a resistor 58, a resistor 59, a resistor 60, a resistor 61, a resistor 62, a resistor 63, a resistor 64, a resistor 65, a resistor 66, a resistor 67, a light emitting diode A1, a light emitting diode A2, a light emitting diode A3, a light emitting diode A4, a light emitting diode B1, a light emitting diode H1, a light emitting diode H2, a transistor Q9, a transistor Q10, a transistor Q11, a transistor Q12, and a transistor Q13;

[0061] Resistor R49, light emitting diode A1, transistor Q15 and resistor R62 are connected in series, and resistor R69 is connected in parallel with transistor Q15; resistor R50, light emitting diode A2, transistor Q14 and resistor R61 are connected in series, and resistor R68 is connected in parallel with transistor Q14; resistor R51, light emitting diode A3, transistor Q13 and resistor R60 are connected in series, and resistor R67 is connected in parallel with transistor Q13; resistor R52, light emitting diode A4, transistor Q12 and The resistor R59 is connected in series, and the resistor R66 is connected in parallel with the transistor Q12; the resistor R53, the diode B1, the transistor Q11 and the resistor R58 are connected in series, and the resistor R65 is connected in parallel with the transistor Q11; the resistor R54, the diode H1, the transistor Q10 and the resistor R57 are connected in series, and the resistor R64 is connected in parallel with the transistor Q10; the resistor R55, the light-emitting diode H2, the transistor Q9 and the resistor R56 are connected in series, and the resistor R63 is connected in parallel with the transistor Q9;

[0062] The light bar circuit includes a resistor R14, a resistor R15, a resistor R16, a resistor R46, a resistor R47, a resistor R48, a light emitting diode B2, a light emitting diode B3, a light emitting diode B4, a light emitting diode H3, a light emitting diode H4, a light emitting diode H5, a transistor Q1 and a transistor Q8;

[0063] Resistors R46, R47 and transistor Q8 are connected in series, light-emitting diodes H3, H4 and H5 are connected in parallel, and transistor Q8 is connected in parallel with resistor R48; resistors R16, R14 and transistor Q1 are connected in series, light-emitting diodes B2, B3 and B4 are connected in parallel, and transistor Q1 is connected in parallel with resistor R15. Resistors R46, R47 and transistor Q8 are connected in series, diodes H3, H4 and H5 are connected in parallel, and transistor Q8 is connected in parallel with resistor R48; resistors R16, R14 and transistor Q1 are connected in series, diodes B2, B3 and B4 are connected in parallel, and transistor Q1 is connected in parallel with resistor R15.

[0064] The TFT driving circuit is electrically connected to the touch control circuit via the pins SWCLK and SWDIO of the chip U3;

[0065] The touch control circuit includes a chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a capacitor C5, an ESD diode D5, a connector CON2 and a touch button, the connector C0N2 includes a pin 1, a pin 2, a pin 3 and a pin 4; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7, a pin 8, a pin 9, a pin 10, a pin 11, a pin 12, a pin 13, a pin 14, a pin 15 and a pin 16;

[0066] Pin 1 of chip U1 is electrically connected to resistor R5, pin 2 of chip U1 is electrically connected to resistor R6, pin 3 of chip U1 is electrically connected to resistor R3, pin 4 of chip U1 is electrically connected to resistor R4, pin 7 of chip U1 is electrically connected to capacitor C4, capacitor C5 and ESD diode D5, capacitor C4, capacitor C5 and ESD diode D5 are connected in parallel, one end of capacitor C4, capacitor C5 and ESD diode D5 is grounded, and one end is connected to power supply VCCV3, pin 9 of chip U1 is electrically connected to resistor R1, pin 13 of chip U1 is electrically connected to resistor R2, and pin 15 of chip U1 is electrically connected to resistor R7; pin 1 of connector CON2 is electrically connected to the power supply, pin 2 and pin 3 of connector CON2 are electrically connected to the signal line, and pin 4 of connector CON2 is grounded.

[0067] The FLASH circuit includes a chip U1, a resistor R20, a resistor R21, a resistor R22, a capacitor C6, a capacitor C7 and a capacitor C8; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8;

[0068] The FLASH circuit includes a chip U1, a resistor R20, a resistor R21, a resistor R22, a capacitor C6, a capacitor C7 and a capacitor C8; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8;

[0069] Pin 1 of chip U1 is electrically connected to resistor R20, pin 3 of chip U1 is electrically connected to resistor R21, pin 7 of chip U1 is electrically connected to resistor R22, resistors R20, R21 and R22 are connected in parallel and connected to power supply VCC3VC, pin 4 of chip U1 is grounded, pin 6 of chip U1 is electrically connected to capacitor C8, one section of capacitor C8 is grounded, pin 8 of chip U1 is electrically connected to capacitor C7 and capacitor C6, capacitor C7 and capacitor C6 are connected in parallel, one end of capacitor C7 and capacitor C6 is grounded, and the other end is electrically connected to power supply VCC3V3.

[0070] The TFT drive circuit controls the buzzer circuit through the pins PB6 and PB10 of chip U3;

[0071] The buzzer circuit includes a low frequency port BUZ2, a resistor 23, a resistor 24, a resistor 25, a resistor 26, a resistor 27, a resistor 28, a resistor 29, a resistor 30, a resistor 31, a capacitor C12, a transistor Q5, a transistor Q6 and a transistor Q7;

[0072] Resistor R31, resistor R29 and transistor Q5 are connected in series, resistor R30 and transistor Q5 are connected in series, resistor R23, resistor R24, resistor R25, resistor R26 and capacitor C12 are connected in series, resistor R23, resistor R27, transistor Q6 and transistor Q7 are connected in series, resistor R28 and transistor Q7 are connected in series, one end of resistor R28 and transistor Q7 is electrically connected to power supply VCC5V, one end of transistor Q6 and resistor R25 is grounded, and one end of transistor Q5 and resistor R30 is grounded.

[0073] The TFT driving circuit is electrically connected to the serial port circuit via pins PA2 and PA3 of chip U3;

[0074] The serial port circuit includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an ESD diode D3, an ESD diode D4, a capacitor C16, a capacitor C17, a diode Q2, and a diode Q3;

[0075] Resistor R9 is connected in parallel with resistor R13, one end of resistor R13 is electrically connected to power supply VCC5V, one end of ESD diode D4 is grounded, one end of capacitor C17 is grounded, and diode Q2 is connected in series with resistor R12; resistor R8 is connected in parallel with capacitor C16, resistor R8 is connected in parallel with ESD diode D3, resistor R8 is connected in parallel with diode Q3, one end of ESD diode D3 is grounded, one end of capacitor C16 is grounded, resistor R10 is connected in parallel with resistor R11, the serial port circuit is connected in series with resistor R40 through MCU RX, and the serial port circuit is connected in series with resistor R41 through MCU TX.

[0076] The TFT drive circuit controls the backlight circuit via the pin PA4 of chip U3;

[0077] The backlight circuit includes LEDA pin, LEDK pin, resistor R17, resistor R18, resistor R19, resistor R45 and transistor Q4;

[0078] The resistor R19 is connected in parallel with the resistor R45, the resistor R18 is connected in parallel with the transistor Q4, the resistor R18 is connected in parallel with the resistor R17, the LEDA pin of the backlight circuit is connected to the power supply VCC5V, and the LEDK pin of the backlight circuit is grounded.

[0079] The power supply circuit is used to supply power to the TFT driving circuit and the screen interface circuit; the output end of the power supply circuit is connected to the input end of the communication interface circuit;

[0080] The power supply circuit includes a chip U4, a resistor R42, a resistor R43, a resistor R44, a capacitor C18, a capacitor C19, a capacitor C20, and a capacitor C21; the chip U4 includes a pin 1, a pin 2, a pin 3, and a pin 4;

[0081] Pin 1 of chip U4 is electrically connected to power supply VCC5V, pin 2 of chip U4 is grounded, pin 3 of chip U4 is electrically connected to resistor R42, pin 4 of chip U4 is electrically connected to resistor R43, resistor R44 and capacitor C18, resistor R44 and capacitor C18 are connected in parallel, one end of resistor R43 is grounded, pin 5 of chip U4 is electrically connected to capacitor C19, capacitor C20 and capacitor C21, capacitor C19, capacitor C20 and capacitor C21 are connected in parallel, pin 5 of chip U4 is electrically connected to power supply VCCV3, one end of capacitor C19, capacitor C20 and capacitor C21 is grounded;

[0082] The communication interface circuit includes a connector CON1, a TVS tube D1, a voltage regulator tube D2, a capacitor C1, a capacitor C2 and a capacitor C3, and the connector CON1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5 and a pin 6;

[0083] Pin 1 and pin 6 of connector CON1 are grounded, pin 2 of connector CON1 is electrically connected to TVS tube D1, voltage regulator tube D2, capacitor C1, capacitor C2 and capacitor C3, TVS tube D1, voltage regulator tube D2, capacitor C1, capacitor C2 and capacitor C3 are connected in parallel, pin 2 of connector CON1 is electrically connected to power supply VCC5V, one end of TVS tube D1, voltage regulator tube D2, capacitor C1, capacitor C2 and capacitor C3 is grounded, pin 3 of connector CON1 indicates customer reception, pin 4 of connector CON1 indicates customer transmission, and pin 5 of connector CON1 is grounded.

[0084] The working principle of this utility model:

[0085] TFT drive circuit: The display screen is connected to the CON4 connector of the screen interface circuit through the FPC cable. The software transplants the code used to match customer needs on the STM32G070CBT6 chip to drive the TFT display screen. LED drive circuit: After power-on, the high and low levels are switched through the relevant control pins (PF1, PF0, PC15, PC14, PB7, PB8, PB9, PA15 and PD0) of the STM32G070CBT6. The switching characteristics of the transistor MMBT3904 are used. When the transistor is high, it is turned on and the corresponding transistor-driven lamp core is lit; when the transistor is low, there is no response, and the corresponding lamp core is not lit. The corresponding display icon is displayed based on this principle. This circuit includes a key light circuit and a light bar circuit. The function of the key light is to indicate the area where the key is located. When it is not triggered, the key light is at 50% brightness, and when it is triggered, the key light is at 100% brightness; the light bar is used to display different working states, such as red light indicates hot water, and blue light indicates cold water. Touch control circuit: The chip HC89F301C is a touch IC, P1.4~P1.7, P0.2, P2.1 and P2.3 are the touch channels of the chip, each channel is connected to a 1K resistor, and then connected to the touch spring, the spring is covered with the corresponding display interface and touch panel; when the user touches the display panel at that position, the touch channel senses the change of parasitic capacitance brought by the hand, thereby triggering the corresponding display interface. FLASH circuit: A GD25Q128ESIG FLASH chip is used to store the user's display pictures and dynamic pictures as well as software codes. Buzzer circuit: PB6 and PB10 of the chip STM32G070CBT6 are used to control the buzzer, of which PB10 is used to control the on and off of the buzzer power supply; PB6 has a hardware PWM function, and by adjusting the duty cycle and frequency of PWM, the buzzer can emit different tones. Serial port circuit: PA2 and PA3 of the STM32G070CBT6 chip are a set of serial ports, which are used to communicate with the customer's mainboard to execute the mainboard's related instructions; PA0 and PA1 are also a set of serial ports, which are used to receive the key change information sensed by the touch chip, and then send related instructions to the mainboard, and the mainboard responds to different functions, such as hot / cold water from the faucet. Backlight drive circuit: The PA4 pin of the STM32G070CBT6 chip controls the backlight of the TFT screen by switching between high and low levels. Power supply circuit: The power supply chip LP3981AB5F can convert 5V power into 3.3V, which is used to power the STM32G070CBT6 chip and the TFT screen.

[0086] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0087] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A TFT+LED touch display module, characterized in that: The touch display module includes: a TFT drive circuit module, an LED drive circuit module, a touch control circuit, a FLASH circuit, a buzzer circuit, a serial port circuit, a backlight circuit and a power circuit module; the TFT drive circuit module includes a TFT drive circuit and a screen interface circuit; the LED drive circuit module includes a key light circuit and a light bar circuit; the power circuit module includes a power circuit and a communication interface circuit; The TFT driving circuit is electrically connected to the screen interface circuit, the key light circuit, the light bar circuit, the touch control circuit, the FLASH circuit, the buzzer circuit, the serial port circuit, the backlight circuit and the power supply circuit through the chip U3.

2. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit is connected to the CON4 terminal of the screen interface circuit through an FPC cable; The TFT driving circuit includes a chip U3, a capacitor C11, a resistor R32 and a connector C0N3; the chip U3 includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21, pin 22, pin 23, pin 24, pin 25, pin 26, pin 27, pin 28, pin 29, pin 30, pin 31, pin 32, pin 33, pin 34, pin 35, pin 36 and pin 37; the connector C0N3 includes pin 1, pin 2, pin 3 and pin 4; Pin 6 of the chip U3 is electrically connected to the power supply VCC3V3, one end of the pin 7 of the chip U3 is grounded, pin 10 of the chip U3 is electrically connected to the resistor R32 and the capacitor C11, the resistor R32 and the capacitor C11 are connected in parallel, one end of the resistor R32 is electrically connected to the power supply VCC3V3, one end of the capacitor C11 is grounded, the pins 13 and 14 are electrically connected to the inside of the chip, the pin 1 of the connector CON3 is electrically connected to the power supply, the pins 2 and 3 of the connector CON3 are electrically connected to the signal line, and the pin 4 of the connector CON3 is grounded; The screen interface circuit includes a circuit board FPC-05-20P, a resistor R33, a resistor R34, a resistor R35, a resistor R36, a resistor R37, a resistor R38 and a resistor R39; the circuit board FPC-05-20P includes pin 1, pin 2, pin 3, pin 4, pin 5, pin 6, pin 7, pin 8, pin 9, pin 10, pin 11, pin 12, pin 13, pin 14, pin 15, pin 16, pin 17, pin 18, pin 19, pin 20, pin 21 and pin 22; Pin 1 of the circuit board FPC-05-20P is electrically connected to the power supply VCC3V3, pin 2 of the circuit board FPC-05-20P is grounded, pin 3 of the circuit board FPC-05-20P is electrically connected to resistor R33 and resistor R34, the resistor R33 is connected in parallel with the resistor R34, and the other end of the resistor R33 is connected to the power supply VCC3C3, and the other end of the resistor R34 is grounded, pin 4 of the circuit board FPC-05-20P is electrically connected to resistor R35, and the circuit board FPC-05-20P Pin 5 is electrically connected to resistor R36, pin 6 of the circuit board FPC-05-20P is electrically connected to resistor R37, pin 7 of the circuit board FPC-05-20P is electrically connected to the inside of the circuit board, pin 8 of the circuit board FPC-05-20P is electrically connected to resistor R38, pin 9 of the circuit board FPC-05-20P is electrically connected to resistor R39, pin 18 of the circuit board FPC-05-20P is grounded, and pins 21 and 22 of the circuit board FPC-05-20P are grounded in parallel.

3. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit is electrically connected to the key light circuit and the light bar circuit through the pins PF1, PF0, PC15, PC14, PB7, PB8, PB9, PA15 and PD0 of the chip U3; The key light circuit includes a power supply VCC5V, a resistor R49, a resistor R50, a resistor 51, a resistor 52, a resistor 53, a resistor 54, a resistor 55, a resistor 56, a resistor 57, a resistor 58, a resistor 59, a resistor 60, a resistor 61, a resistor 62, a resistor 63, a resistor 64, a resistor 65, a resistor 66, a resistor 67, a light emitting diode A1, a light emitting diode A2, a light emitting diode A3, a light emitting diode A4, a light emitting diode B1, a light emitting diode H1, a light emitting diode H2, a transistor Q9, a transistor Q10, a transistor Q11, a transistor Q12, and a transistor Q13; The resistor R49, the light emitting diode A1, the transistor Q15 and the resistor R62 are connected in series, and the resistor R69 is connected in parallel with the transistor Q15; the resistor R50, the light emitting diode A2, the transistor Q14 and the resistor R61 are connected in series, and the resistor R68 is connected in parallel with the transistor Q14; the resistor R51, the light emitting diode A3, the transistor Q13 and the resistor R60 are connected in series, and the resistor R67 is connected in parallel with the transistor Q13; the resistor R52, the light emitting diode A4, the transistor Q12 and The resistor R59 is connected in series, and the resistor R66 is connected in parallel with the transistor Q12; the resistor R53, the diode B1, the transistor Q11 and the resistor R58 are connected in series, and the resistor R65 is connected in parallel with the transistor Q11; the resistor R54, the diode H1, the transistor Q10 and the resistor R57 are connected in series, and the resistor R64 is connected in parallel with the transistor Q10; the resistor R55, the light-emitting diode H2, the transistor Q9 and the resistor R56 are connected in series, and the resistor R63 is connected in parallel with the transistor Q9; The light bar circuit includes a resistor R14, a resistor R15, a resistor 16, a resistor R46, a resistor R47, a resistor R48, a light emitting diode B2, a light emitting diode B3, a light emitting diode B4, a light emitting diode H3, a light emitting diode H4, a light emitting diode H5, a transistor Q1 and a transistor Q8; The resistors R46, R47 and transistor Q8 are connected in series, the light-emitting diodes H3, H4 and H5 are connected in parallel, and the transistor Q8 is connected in parallel with the resistor R48; the resistors R16, R14 and transistor Q1 are connected in series, the light-emitting diodes B2, B3 and B4 are connected in parallel, and the transistor Q1 is connected in parallel with the resistor R15.

4. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit is electrically connected to the touch control circuit via the pins SWCLK and SWDIO of the chip U3; The touch control circuit includes a chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C4, a capacitor C5, an ESD diode D5, a connector CON2 and a touch button, wherein the connector CON2 includes a pin 1, a pin 2, a pin 3 and a pin 4; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7, a pin 8, a pin 9, a pin 10, a pin 11, a pin 12, a pin 13, a pin 14, a pin 15 and a pin 16; Pin 1 of the chip U1 is electrically connected to resistor R5, pin 2 of the chip U1 is electrically connected to resistor R6, pin 3 of the chip U1 is electrically connected to resistor R3, pin 4 of the chip U1 is electrically connected to resistor R4, pin 7 of the chip U1 is electrically connected to capacitor C4, capacitor C5 and ESD diode D5, the capacitor C4, capacitor C5 and ESD diode D5 are connected in parallel, one end of the capacitor C4, capacitor C5 and ESD diode D5 is grounded, and one end is connected to power supply VCCV3, pin 9 of the chip U1 is electrically connected to resistor R1, pin 13 of the chip U1 is electrically connected to resistor R2, and pin 15 of the chip U1 is electrically connected to resistor R7; pin 1 of the connector CON2 is electrically connected to the power supply, pins 2 and pin 3 of the connector CON2 are electrically connected to the signal line, and pin 4 of the connector CON2 is grounded.

5. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit is electrically connected to the FLASH circuit through the pins FLASH CS, FLASH WP, FLASH DI, FLASH DO and FLASH CLK of the chip U3; The FLASH circuit includes a chip U1, a resistor R20, a resistor R21, a resistor R22, a capacitor C6, a capacitor C7 and a capacitor C8; the chip U1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5, a pin 6, a pin 7 and a pin 8; Pin 1 of the chip U1 is electrically connected to resistor R20, pin 3 of the chip U1 is electrically connected to resistor R21, pin 7 of the chip U1 is electrically connected to resistor R22, the resistors R20, R21 and R22 are connected in parallel to each other and connected to the power supply VCC3VC, pin 4 of the chip U1 is grounded, pin 6 of the chip U1 is electrically connected to capacitor C8, one section of the capacitor C8 is grounded, pin 8 of the chip U1 is electrically connected to capacitor C7 and capacitor C6, the capacitor C7 and capacitor C6 are connected in parallel, one end of the capacitor C7 and capacitor C6 is grounded, and the other end is electrically connected to the power supply VCC3V3.

6. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit controls the buzzer circuit via the pins PB6 and PB10 of the chip U3; The buzzer circuit includes a low frequency port BUZ2, a resistor 23, a resistor 24, a resistor 25, a resistor 26, a resistor 27, a resistor 28, a resistor 29, a resistor 30, a resistor 31, a capacitor C12, a transistor Q5, a transistor Q6 and a transistor Q7; The resistor R31, the resistor R29 and the transistor Q5 are connected in series, the resistor R30 and the transistor Q5 are connected in series, the resistor R23, the resistor R24, the resistor R25, the resistor R26 and the capacitor C12 are connected in series, the resistor R23, the resistor R27, the transistor Q6 and the transistor Q7 are connected in series, the resistor R28 and the transistor Q7 are connected in series, one end of the resistor R28 and the transistor Q7 are electrically connected to the power supply VCC5V, one end of the transistor Q6 and the resistor R25 are grounded, and one end of the transistor Q5 and the resistor R30 are grounded.

7. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit is electrically connected to the serial port circuit via pins PA2 and PA3 of chip U3; The serial port circuit includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an ESD diode D3, an ESD diode D4, a capacitor C16, a capacitor C17, a diode Q2, and a varactor diode Q3; The resistor R9 is connected in parallel with the resistor R13, one end of the resistor R13 is electrically connected to the power supply VCC5V, one end of the ESD diode D4 is grounded, one end of the capacitor C17 is grounded, and the diode Q2 is connected in series with the resistor R12; the resistor R8 is connected in parallel with the capacitor C16, the resistor R8 is connected in parallel with the ESD diode D3, the resistor R8 is connected in parallel with the varactor diode Q3, one end of the ESD diode D3 is grounded, one end of the capacitor C16 is grounded, the resistor R10 is connected in parallel with the resistor R11, the serial port circuit is connected in series with the resistor R40 through the MCU RX, and the serial port circuit is connected in series with the resistor R41 through the MCU TX.

8. The TFT+LED touch display module according to claim 1, characterized in that: The TFT driving circuit controls the backlight circuit via the pin PA4 of the chip U3; The backlight circuit includes an LEDA pin, an LEDK pin, a resistor R17, a resistor R18, a resistor R19, a resistor R45 and a transistor Q4; The resistor R19 is connected in parallel with the resistor R45, the resistor R18 is connected in parallel with the transistor Q4, the resistor R18 is connected in parallel with the resistor R17, the LEDA pin of the backlight circuit is connected to the power supply VCC5V, and the LEDK pin of the backlight circuit is grounded.

9. The TFT+LED touch display module according to claim 1, characterized in that: The power supply circuit is used to supply power to the TFT driving circuit and the screen interface circuit; the output end of the power supply circuit is connected to the input end of the communication interface circuit; The power supply circuit includes a chip U4, a resistor R42, a resistor R43, a resistor R44, a capacitor C18, a capacitor C19, a capacitor C20, and a capacitor C21; the chip U4 includes a pin 1, a pin 2, a pin 3, and a pin 4; Pin 1 of the chip U4 is electrically connected to power supply VCC5V, pin 2 of the chip U4 is grounded, pin 3 of the chip U4 is electrically connected to resistor R42, pin 4 of the chip U4 is electrically connected to resistor R43, resistor R44 and capacitor C18, the resistor R44 and capacitor C18 are connected in parallel, one end of the resistor R43 is grounded, pin 5 of the chip U4 is electrically connected to capacitor C19, capacitor C20 and capacitor C21, the capacitor C19, capacitor C20 and capacitor C21 are connected in parallel, pin 5 of the chip U4 is electrically connected to power supply VCCV3, one end of the capacitor C19, capacitor C20 and capacitor C21 is grounded; The communication interface circuit includes a connector CON1, a TVS tube D1, a voltage regulator tube D2, a capacitor C1, a capacitor C2 and a capacitor C3, and the connector CON1 includes a pin 1, a pin 2, a pin 3, a pin 4, a pin 5 and a pin 6; Pin 1 and pin 6 of the connector CON1 are grounded, pin 2 of the connector CON1 is electrically connected to the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3, the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3 are connected in parallel, pin 2 of the connector CON1 is electrically connected to the power supply VCC5V, one end of the TVS tube D1, the voltage regulator tube D2, the capacitor C1, the capacitor C2 and the capacitor C3 are grounded, pin 3 of the connector CON1 indicates customer reception, pin 4 of the connector CON1 indicates customer transmission, and pin 5 of the connector CON1 is grounded.

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