Hair dryer display device and hair dryer with same

Abstract

The utility model discloses a hair dryer display device and a hair dryer with the same. The hair dryer display device comprises a display power supply circuit, a touch signal input circuit, a touch display control circuit, a display drive circuit and an LED dot matrix gating circuit. The input end of the display power supply circuit is electrically connected with an external power source, the output end of the display power supply circuit is electrically connected with the input end of the touch display control circuit and the input end of the display drive circuit, and the input end of the touch display control circuit is electrically connected with the output end of the touch signal input circuit. And the output end of the touch display control circuit is electrically connected with the LED dot matrix gating circuit through the display driving circuit. According to the utility model, corresponding display effects under various modes such as wind speed, temperature and the like can be generated, stepless adjustment and display of the temperature and the wind speed are realized, the condition that the temperature and the wind speed are circularly adjusted and displayed by operating touch keys is effectively avoided, the screen operation and display are relatively simple and practical, and the cost is low. And the use experience of the user on the hair drier is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryer displays, and particularly relates to a hair dryer display device and a hair dryer having the same. Background Art

[0002] With the continuous improvement of people's living quality, hair dryers have long become essential household appliances.

[0003] Existing hair dryers have different temperature gears and wind speed gears, and different temperature gears and wind speed gears correspond to different hair drying functions of the hair dryer. To achieve different hair drying functions of the hair dryer, it is usually achieved by temperature keys and wind speed keys provided on the hair dryer. Users need to press the keys of the hair dryer multiple times and then judge the suitable temperature gear and wind speed gear through their senses. Such hair dryers lack intuitive and accurate temperature gear and wind speed gear indications, which is inconvenient for users and results in a poor experience.

[0004] Currently, there are also some hair dryers that achieve the adjustment and indication of temperature gears and wind speed directions through touch keys and a display screen. However, their adjustment methods are relatively cumbersome. Generally, the cyclic adjustment of temperature and wind speed is achieved through "+" and "-" touch keys. Correspondingly, the display screen can only cyclically display the temperature and wind speed after operating the "+" and "-" touch keys, and it is impossible to achieve stepless adjustment and display of temperature and wind speed. The screen operation and display are both relatively cumbersome, which also reduces the user experience. Summary of the Utility Model

[0005] In view of this, the utility model provides a hair dryer display device and a hair dryer having the same to solve the problem that existing hair dryers cannot achieve stepless adjustment and display of temperature and wind speed, which reduces the user experience.

[0006] The utility model provides a hair dryer display device, including a display power supply circuit, a touch signal input circuit, a touch display control circuit, a display driving circuit, and an LED dot matrix strobe circuit;

[0007] The input end of the display power supply circuit is electrically connected to an external power supply, and the output end of the display power supply circuit is electrically connected to the input end of the touch display control circuit and the input end of the display driving circuit. The input end of the touch display control circuit is electrically connected to the output end of the touch signal input circuit, and the output end of the touch display control circuit is electrically connected to the LED dot matrix strobe circuit through the display driving circuit.

[0008] Optionally, the touch display control circuit includes a microcontroller U2, a first capacitor C1, and a second capacitor C5; wherein, the microcontroller U2 has multiple touch channel pins;

[0009] The positive power supply pin VDD of the microcontroller U2 is electrically connected to the output terminal of the display power supply circuit. The negative power supply pin VSS of the microcontroller U2 is grounded. The first end of the first capacitor C1 is connected to the common connection terminal between the positive power supply pin VDD of the microcontroller U2 and the output terminal of the display power supply circuit, and the second end of the first capacitor C1 is grounded. The first end of the second capacitor C5 is electrically connected to the touch external capacitor pin CMOD of the microcontroller U2, and the second end of the second capacitor C5 is grounded.

[0010] All 10 touch channel pins in the microcontroller U2 are electrically connected to the output terminal of the touch signal input circuit. The 11th touch channel pin and the 12th touch channel pin of the microcontroller U2 are both electrically connected to the input terminal of the display driver circuit.

[0011] Optionally, the microcontroller U2 is specifically a microcontroller of the SC92F8482 model.

[0012] Optionally, the display driver circuit includes an LED driver chip U3, a first resistor R16, a second resistor R17, a third resistor R18, a fourth resistor R19, a third capacitor C4, a fourth capacitor C6, and a fifth capacitor C7. Among them, the LED driver chip U3 has 8 segment select pins and at least 8 digit select pins.

[0013] The positive power supply pin VDD of the LED driver chip U3 is electrically connected to the output terminal of the display power supply circuit. The first end of the third capacitor C4 is connected to the common connection terminal between the positive power supply pin VDD of the LED driver chip U3 and the output terminal of the display power supply circuit, and the second end of the third capacitor C4 is grounded. The negative power supply pin VSS of the LED driver chip U3 is grounded.

[0014] The eight segment selection pins and at least eight digit selection pins of the LED driving chip U3 are all electrically connected to the LED dot matrix strobe circuit; the data input pin DIN of the LED driving chip U3 is electrically connected to the output end of the touch display control circuit through the third resistor R18, and the data input pin DIN of the LED driving chip U3 is also electrically connected to the output end of the display power supply circuit through the first resistor R16; the clock input pin SCLK of the LED driving chip U3 is electrically connected to the output end of the touch display control circuit through the fourth resistor R19, and the clock input pin SCLK of the LED driving chip U3 is also electrically connected to the output end of the display power supply circuit through the second resistor R17; the first end of the fourth capacitor C6 is connected to the common connection end between the data input pin DIN of the LED driving chip U3 and the first resistor R16, and the second end of the fourth capacitor C6 is grounded; the first end of the fifth capacitor C7 is connected to the common connection end between the clock input pin SCLK of the LED driving chip U3 and the second resistor R17, and the second end of the fifth capacitor C7 is grounded.

[0015] Optionally, the LED dot matrix strobe circuit includes eight LED dot matrices, and the eight LED dot matrices correspond to the eight segment selection pins of the LED driving chip U3 one by one;

[0016] In each LED dot matrix, each LED dot matrix includes a plurality of LEDs, and the anodes of all the LEDs are connected together and electrically connected to a corresponding segment selection pin in the LED driving chip U3; the cathode of each LED is electrically connected to one of the digit selection pins of the LED driving chip U3, and the digit selection pins connected to the cathodes of each LED are all different.

[0017] Optionally, the touch signal input circuit includes a touch signal sampling sub-circuit and a signal input sub-circuit;

[0018] The input end of the touch signal sampling sub-circuit is electrically connected to the capacitive conductive film provided on the hair dryer, and the output end of the touch signal sampling sub-circuit is electrically connected to the input end of the touch display control circuit through the signal input sub-circuit.

[0019] Optionally, the signal input sub-circuit includes a first connector CN1 and ten fifth resistors; the first connector CN1 has eleven pins;

[0020] All 11 pins of the first connector CN1 are electrically connected to the output end of the touch signal sampling sub-circuit; pins 1 to 10 of the first connector CN1 are also respectively and correspondingly electrically connected to the first ends of 10 fifth resistors, and the second ends of the 10 fifth resistors are all electrically connected to the input end of the touch display control circuit; pin 11 of the first connector CN1 is also grounded.

[0021] Optionally, the display power supply circuit includes a voltage regulator IC chip U1, a voltage regulator diode ZD1, a sixth resistor R15, a sixth capacitor C2, and a seventh capacitor C3;

[0022] The voltage input pin Vi of the voltage regulator IC chip U1 is electrically connected to an external power supply through the sixth resistor R15. The voltage output pin Vo of the voltage regulator IC chip U1 is electrically connected to both the input end of the touch display control circuit and the input end of the display driving circuit. The ground pin GND of the voltage regulator IC chip U1 is grounded;

[0023] The negative electrode of the voltage regulator diode ZD1 is connected to the common connection end between the sixth resistor R15 and the external power supply, and the positive electrode of the voltage regulator diode ZD1 is grounded; the first end of the sixth capacitor C2 is connected to the common connection end between the voltage input pin Vi of the voltage regulator IC chip U1 and the sixth resistor R15, and the second end of the sixth capacitor C2 is grounded; the first end of the seventh capacitor C3 is connected to the common connection end between the voltage output pin Vo of the voltage regulator IC chip U1 and the input end of the touch display control circuit, and the second end of the seventh capacitor C3 is grounded.

[0024] Optionally, a communication circuit is further included;

[0025] The touch display control circuit is electrically connected to a main control board configured on the hair dryer through the communication circuit.

[0026] In addition, the present utility model further provides a hair dryer, including:

[0027] A machine body;

[0028] A power supply, provided on the machine body;

[0029] And the aforementioned hair dryer display device, provided on the machine body and electrically connected to the power supply.

[0030] Advantages of the present utility model: The input end of the display power supply circuit is connected to the voltage provided by an external power supply, and then is respectively output to the input end of the touch display control circuit and the input end of the display driving circuit through its output end, providing the normal operating voltage for the touch display control circuit and the display driving circuit respectively; the input end of the touch display control circuit is also electrically connected to the output end of the touch signal input circuit, accessing the touch signal generated by the user operating the hair dryer display device, and generating a corresponding display control signal according to the touch signal; the output end of the touch display control circuit is electrically connected to the LED dot matrix strobe circuit through the display driving circuit, then the display driving circuit can generate a corresponding display driving signal according to the display control signal provided by the touch display control circuit, strobe the corresponding LED in the LED dot matrix strobe circuit, control the corresponding LED to light up, and achieve the corresponding display effect; since there are multiple LEDs in the LED dot matrix strobe circuit, therefore, after the user operates the hair dryer display device, corresponding display effects under various mode regulations such as wind speed and temperature can be generated, and further, stepless regulation and display of temperature and wind speed can be conveniently realized;

[0031] The hair dryer display device of the present utility model and the hair dryer having the same, based on the strobe control of the LED dot matrix strobe circuit, can generate corresponding display effects under various mode regulations such as wind speed and temperature, realize stepless regulation and display of temperature and wind speed, effectively avoid realizing the cyclic regulation and display of temperature and wind speed by operating the "+" and "-" touch keys, the screen operation and display are relatively simple and practical, and greatly improve the user experience of using the hair dryer. Brief Description of the Drawings

[0032] The features and advantages of the present utility model will be more clearly understood by referring to the attached drawings. The drawings are schematic and should not be construed as any limitation to the present utility model. In the drawings:

[0033] Figure 1 The structural diagram of a hair dryer display device in Embodiment 1 of the present utility model is shown;

[0034] Figure 2 The layout diagram of each LED in the LED dot matrix strobe circuit on the hair dryer in Embodiment 1 of the present utility model is shown;

[0035] Figure 3 The structural diagram of another hair dryer display device in Embodiment 1 of the present utility model is shown;

[0036] Figure 4 The design diagram of the programming interface circuit in Embodiment 1 of the present utility model is shown;

[0037] Figure 5 The design diagram of the touch display control circuit in Embodiment 1 of the present utility model is shown;

[0038] Figure 6 shows the design diagram of the display driving circuit in the first embodiment of the present utility model;

[0039] Figure 7 shows the design diagram of the LED dot matrix strobe circuit in the first embodiment of the present utility model;

[0040] Figure 8 shows the design diagram of the signal input sub - circuit in the first embodiment of the present utility model;

[0041] Figure 9 shows the design diagram of the display power supply circuit in the first embodiment of the present utility model;

[0042] Figure 10 shows the design diagram of the communication circuit in the first embodiment of the present utility model;

[0043] Figure 11 shows the structural diagram of a hair dryer in the second embodiment of the present utility model. Detailed implementation manners

[0044] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0045] Embodiment 1

[0046] As Figure 1 shown, a hair dryer display device includes a display power supply circuit, a touch signal input circuit, a touch - control display control circuit, a display driving circuit and an LED dot matrix strobe circuit;

[0047] The input end of the display power supply circuit is electrically connected to an external power supply, the output end of the display power supply circuit is electrically connected to the input ends of both the touch - control display control circuit and the display driving circuit, the input end of the touch - control display control circuit is electrically connected to the output end of the touch signal input circuit, and the output end of the touch - control display control circuit is electrically connected to the LED dot matrix strobe circuit through the display driving circuit.

[0048] The input end of the display power supply circuit is connected to the voltage provided by an external power supply, and then outputs to the input ends of the touch display control circuit and the display driving circuit respectively through its output end, providing the normal working voltage for the touch display control circuit and the display driving circuit respectively; the input end of the touch display control circuit is also electrically connected to the output end of the touch signal input circuit, accessing the touch signal generated by the user operating the hair dryer display device, and generating a corresponding display control signal according to the touch signal; the output end of the touch display control circuit is electrically connected to the LED dot matrix gating circuit through the display driving circuit, then the display driving circuit can generate a corresponding display driving signal according to the display control signal provided by the touch display control circuit, gate the corresponding LED in the LED dot matrix gating circuit, and control the corresponding LED to light up to achieve the corresponding display effect; since there are multiple LEDs in the LED dot matrix gating circuit, therefore, after the user operates the hair dryer display device, corresponding display effects under various mode regulations such as wind speed and temperature can be generated, realizing stepless regulation and display of temperature and wind speed, etc.

[0049] The hair dryer display device of this embodiment, based on the gating control of the LED dot matrix gating circuit, can generate corresponding display effects under various mode regulations such as wind speed and temperature, realizing stepless regulation and display of temperature and wind speed, etc., effectively avoiding the cyclic regulation and display of temperature and wind speed by operating the "+" and "-" touch keys. The screen operation and display are both relatively simple and practical, greatly improving the user experience of using the hair dryer.

[0050] It should be understood that the number of LEDs in the LED dot matrix gating circuit of this embodiment is not limited, and can be arranged according to the actual situation of the display screen of the hair dryer. In addition, the present invention is not limited to the stepless regulation and display of wind speed and temperature alone, and other modes can also be displayed according to actual needs. For example Figure 2 as shown, there are multiple LEDs in the LED dot matrix gating circuit (specifically, the upper half of the LEDs arranged along the circumference in Figure 2 are used specifically for the stepless display of wind speed, and there are multiple LEDs (specifically, the lower half of the LEDs arranged along the circumference in Figure 2 are used specifically for the stepless display of temperature, and there are several LEDs (specifically, the LEDs arranged in the central area of Figure 2 are used for the display of other modes, such as "baby mode", "plasma mode", "hot and cold alternating mode", etc., and these modes all correspond to fixed wind speed and temperature.

[0051] It should be understood that the present utility model only improves the hardware circuit structure of the hair dryer display device to achieve stepless adjustment and display of temperature and wind speed, without involving improvement of computer programs. The computer programs involved herein are all conventional computer programs in the art and can be pre-burned on the main control chip of the hair dryer display device (such as the microcontroller of the touch display control circuit).

[0052] Preferably, as Figure 3 shown, the hair dryer display device further includes a programming interface circuit;

[0053] The input end of the programming interface circuit is electrically connected to the output end of the display power supply circuit and an external programming device, and the output end of the programming interface circuit is electrically connected to the input end of the touch display control circuit.

[0054] Specifically, as Figure 4 shown, the programming interface circuit includes a second connector JP1 with four pins;

[0055] All four pins of the second connector JP1 are electrically connected to the programming device. The 1st pin of the second connector JP1 is electrically connected to the output end of the display power supply circuit. The 2nd pin of the second connector JP1 is grounded. The 3rd pin and the 4th pin of the second connector JP1 are both electrically connected to the input end of the touch display control circuit.

[0056] Through this programming interface circuit, it is convenient to pre-burn the programs required by the main control chip of the hair dryer display device (i.e., the microcontroller in the touch display control circuit) so that the hair dryer display device can smoothly achieve stepless display of wind speed and temperature.

[0057] Among them, the external programming device can be an in-circuit programmer or an off-line programmer / burner, which can write the compiled program code (usually in binary or hexadecimal format) into the memory of the MCU.

[0058] Preferably, as Figure 5 shown, the touch display control circuit includes a microcontroller U2, a first capacitor C1 and a second capacitor C5; among them, the microcontroller U2 has multiple touch channel pins;

[0059] The positive power supply pin VDD of the microcontroller U2 is electrically connected to the output terminal of the display power supply circuit. The negative power supply pin VSS of the microcontroller U2 is grounded. The first end of the first capacitor C1 is connected to the common connection terminal between the positive power supply pin VDD of the microcontroller U2 and the output terminal of the display power supply circuit, and the second end of the first capacitor C1 is grounded. The first end of the second capacitor C5 is electrically connected to the touch external capacitor pin CMOD of the microcontroller U2, and the second end of the second capacitor C5 is grounded.

[0060] All 10 touch channel pins in the microcontroller U2 are electrically connected to the output terminal of the touch signal input circuit. The 11th touch channel pin and the 12th touch channel pin of the microcontroller U2 are both electrically connected to the input terminal of the display driver circuit.

[0061] The touch display control circuit with the above structure can access touch signals with a simplified circuit design, and use multiple touch channel pins to provide different display drive signals to the display driver circuit to enable the selection of multiple LEDs in the LED dot matrix selection circuit, thereby realizing the stepless display of wind speed and temperature.

[0062] Specifically, in this embodiment, the microcontroller U2 is specifically a microcontroller of the SC92F8482 model.

[0063] This model of microcontroller has high performance, high reliability and rich peripheral resources, and can provide a variety of different display drive signals, which is convenient for realizing the stepless display control of wind speed and temperature.

[0064] In the touch display control circuit of this embodiment, the first capacitor and the second capacitor can select appropriate specifications or product models according to the actual situation. For details, see Figure 5 as shown, and will not be listed here. In Figure 5 Among them, the 7th to 12th pins and the 15th to 18th pins of the microcontroller U2 are all 10 touch channel pins electrically connected to the output terminal of the touch signal input circuit. The 4th pin and the 10th pin of the microcontroller U2 are both 2 touch channel pins electrically connected to the input terminal of the display driver circuit. Further, the microcontroller U2 also includes other touch channel pins. Its 5th pin and 6th pin are both 2 touch channel pins electrically connected to the output terminal of the programming interface circuit (specifically, the 5th pin of the microcontroller U2 is electrically connected to the 3rd pin of the second connector JP1 in the programming interface circuit, and the 6th pin of the microcontroller U2 is electrically connected to the 4th pin of the second connector JP1 in the programming interface circuit).

[0065] Preferably, as Figure 6As shown, the display driving circuit includes an LED driving chip U3, a first resistor R16, a second resistor R17, a third resistor R18, a fourth resistor R19, a third capacitor C4, a fourth capacitor C6, and a fifth capacitor C7; among them, the LED driving chip U3 has 8 segment selection pins and at least 8 digit selection pins;

[0066] The positive power supply pin VDD of the LED driving chip U3 is electrically connected to the output terminal of the display power supply circuit. The first end of the third capacitor C4 is connected to the common connection terminal between the positive power supply pin VDD of the LED driving chip U3 and the output terminal of the display power supply circuit, and the second end of the third capacitor C4 is grounded; the negative power supply pin VSS of the LED driving chip U3 is grounded;

[0067] The 8 segment selection pins and at least 8 digit selection pins of the LED driving chip U3 are all electrically connected to the LED dot matrix gating circuit; the data input pin DIN of the LED driving chip U3 is electrically connected to the output terminal of the touch display control circuit through the third resistor R18, and the data input pin DIN of the LED driving chip U3 is also electrically connected to the output terminal of the display power supply circuit through the first resistor R16; the clock input pin SCLK of the LED driving chip U3 is electrically connected to the output terminal of the touch display control circuit through the fourth resistor R19, and the clock input pin SCLK of the LED driving chip U3 is also electrically connected to the output terminal of the display power supply circuit through the second resistor R17; the first end of the fourth capacitor C6 is connected to the common connection terminal between the data input pin DIN of the LED driving chip U3 and the first resistor R16, and the second end of the fourth capacitor C6 is grounded; the first end of the fifth capacitor C7 is connected to the common connection terminal between the clock input pin SCLK of the LED driving chip U3 and the second resistor R17, and the second end of the fifth capacitor C7 is grounded.

[0068] In the display driving circuit with the above structure, the data input pin DIN of the LED driving chip U3 is connected to the display control signal output from the output terminal of the touch display control circuit (the signal output from pin 4 of the microcontroller U2) through the third resistor R18. These signals include control commands and data to be displayed. The clock input pin SCLK of the LED driving chip U3 is connected to the display control signal output from the output terminal of the touch display control circuit (the signal output from pin 20 of the microcontroller U2) through the fourth resistor R19. These signals are the clock signals required for communication between the display driving circuit and the touch display control circuit to ensure synchronous transmission of control data. Through the combined operation of the two input pins of the above LED driving chip U3, effective communication between the touch display control circuit and the display driving circuit is achieved, thereby ensuring that the LED dot matrix strobe circuit displays the required content and realizing stepless display of the hair dryer's wind speed and temperature.

[0069] In the display driving circuit with the above structure, the 8 segment select pins of the LED driving chip U3 are used to control each segment of the LED dot matrix strobe circuit. Each pin corresponds to a segment on the LED dot matrix strobe circuit. By sending high-level or low-level signals to these pins, it is possible to control whether the LEDs in the corresponding segment are lit, thereby displaying different numbers and characters. All the common cathode pins (also known as the common cathode pins) of the LED driving chip U3 are usually connected to the common cathode pins of the LEDs in the LED dot matrix strobe circuit and are used to select which LED to display. In a common cathode digital tube, the cathodes of all the LEDs are connected together. By sending low-level signals to these pins, it is possible to selectively ground the cathode of a certain or certain LEDs, thereby allowing current to pass through the LEDs in its anode (i.e., the SEG pin). Through the combined use of the above two types of pins, precise control of all the LEDs in the LED dot matrix strobe circuit can be achieved, thereby displaying various numbers and characters and ensuring the realization of stepless display of the hair dryer's wind speed and temperature.

[0070] Specifically, as Figure 6 shown, the LED driving chip U3 is specifically an LED display driving chip of the TM1640 model, which includes 8 segment select pins (i.e., pins 9 to 16 of the LED driving chip U3, SEG1 to SEG8 in the TM1640 chip) and 16 common cathode pins (i.e., pins 18 to 28 and pins 1 to 5 of the LED driving chip U3, GR1 to GR16 in the TM1640 chip). Using this model of LED display driving chip can ensure display control of a larger number of LED tubes.

[0071] In the display driving circuit of this embodiment, the specifications or product models of each resistor and capacitor can be selected according to the actual situation. For details, see Figure 6 shown, and will not be listed here.

[0072] Preferably, as Figure 7 shown, the LED dot matrix strobe circuit includes 8 LED dot matrices, and the 8 LED dot matrices correspond one-to-one to 8 segment select pins of the LED driving chip U3;

[0073] In each of the LED dot matrices, each LED dot matrix includes a plurality of LEDs, and anodes of all the LEDs are connected together and electrically connected to a corresponding segment select pin in the LED driving chip U3; cathodes of each LED are electrically connected to one of the bit select pins of the LED driving chip U3, and the bit select pins connected to the cathodes of each LED are all different.

[0074] The 8 LED dot matrices correspond one-to-one to 8 segment select pins, and in each LED dot matrix, anodes of all the LEDs are connected together and electrically connected to the corresponding segment select pins, so that the 8 LED dot matrices can be lit through the 8 segment select pins of the LED driving chip U3; in each LED dot matrix, cathodes of each LED are electrically connected to a bit select pin, and the bit select pins connected to the pins of each LED are all different, then at least 8 bit select pins of the LED driving chip U3 can be used to light each LED in the 8 LED dot matrices, thereby realizing precise control of at least 64 LEDs in the LED dot matrix strobe circuit, and further realizing precise stepless display of the air blower wind speed and temperature.

[0075] Specifically, as Figure 6 shown, only the 8 bit select pins from pin 18 to pin 25 (GR1 to GR8 in the TM1640 chip) in the LED driving chip U3 output signals to the Figure 7 LED dot matrix strobe circuit therein (the remaining 8 bit select pins are floating).

[0076] As Figure 7As shown, among the 8 LED dot matrices, the 1st to 4th LED dot matrices each include 8 LEDs, and the 5th to 8th LED dot matrices each include 7 LEDs, totaling 60 LEDs. Among them, the 1st dot matrix LED includes 8 LEDs D1 to D8. The anodes of D1 to D8 are all connected together and electrically connected to the segment selection pin SEG1 of the LED driver chip U3. The cathodes of D1 to D8 are electrically connected to the 8 bit selection pins GR1 to GR8 of the LED driver chip U3 in a one-to-one correspondence; the 2nd dot matrix LED includes 8 LEDs D9 to D16. The anodes of D9 to D16 are all connected together and electrically connected to the segment selection pin SEG2 of the LED driver chip U3. The cathodes of D9 to D16 are electrically connected to the 8 bit selection pins GR1 to GR8 of the LED driver chip U3 in a one-to-one correspondence; the 3rd dot matrix LED includes 8 LEDs D17 to D24. The anodes of D17 to D24 are all connected together and electrically connected to the segment selection pin SEG3 of the LED driver chip U3. The cathodes of D17 to D24 are electrically connected to the 8 bit selection pins GR1 to GR8 of the LED driver chip U3 in a one-to-one correspondence; the 4th dot matrix LED includes 8 LEDs D25 to D32. The anodes of D25 to D32 are all connected together and electrically connected to the segment selection pin SEG4 of the LED driver chip U3. The cathodes of D25 to D32 are electrically connected to the 8 bit selection pins GR1 to GR8 of the LED driver chip U3 in a one-to-one correspondence; the 5th dot matrix LED includes 7 LEDs D33 to D39. The anodes of D33 to D39 are all connected together and electrically connected to the segment selection pin SEG5 of the LED driver chip U3. The cathodes of D33 to D39 are electrically connected to the 7 bit selection pins GR1 to GR7 of the LED driver chip U3 in a one-to-one correspondence; the 6th dot matrix LED includes 7 LEDs D40 to D46. The anodes of D40 to D46 are all connected together and electrically connected to the segment selection pin SEG6 of the LED driver chip U3. The cathodes of D40 to D46 are electrically connected to the 7 bit selection pins GR1 to GR7 of the LED driver chip U3 in a one-to-one correspondence; the 7th dot matrix LED includes 7 LEDs D47 to D53. The anodes of D47 to D53 are all connected together and electrically connected to the segment selection pin SEG7 of the LED driver chip U3. The cathodes of D47 to D53 are electrically connected to the 7 bit selection pins GR1 to GR7 of the LED driver chip U3 in a one-to-one correspondence; the 8th dot matrix LED includes 7 LEDs D54 to D60. The anodes of D54 to D60 are all connected together and electrically connected to the segment selection pin SEG8 of the LED driver chip U3. The cathodes of D54 to D60 are electrically connected to the 7 bit selection pins GR1 to GR7 of the LED driver chip U3 in a one-to-one correspondence. Thus, in Figure 7In the shown LED dot matrix strobe circuit, the cathodes of eight LEDs, namely D1, D9, D17, D25, D33, D40, D47, and D54, are also connected together and electrically connected to the bit selection pin GR1. Similarly, the cathodes of eight LEDs, namely D2, D10, D18, D26, D34, D41, D48, and D55, are also connected together and electrically connected to the bit selection pin GR2. The cathodes of eight LEDs, namely D3, D11, D19, D27, D35, D42, D49, and D56, are also connected together and electrically connected to the bit selection pin GR3. The cathodes of eight LEDs, namely D4, D12, D20, D28, D36, D43, D50, and D57, are also connected together and electrically connected to the bit selection pin GR4. The cathodes of eight LEDs, namely D5, D13, D21, D29, D37, D44, D51, and D58, are also connected together and electrically connected to the bit selection pin GR5. The cathodes of eight LEDs, namely D6, D14, D22, D30, D38, D45, D52, and D59, are also connected together and electrically connected to the bit selection pin GR6. The cathodes of eight LEDs, namely D7, D15, D23, D31, D39, D46, D53, and D60, are also connected together and electrically connected to the bit selection pin GR7. The cathodes of four LEDs, namely D8, D16, D24, and D32, are also connected together and electrically connected to the bit selection pin GR8.

[0077] Preferably, as Figure 3 shown, the touch signal input circuit includes a touch signal sampling sub-circuit and a signal input sub-circuit;

[0078] The input end of the touch signal sampling sub-circuit is electrically connected to the capacitive conductive film provided on the hair dryer, and the output end of the touch signal sampling sub-circuit is electrically connected to the input end of the touch display control circuit through the signal input sub-circuit.

[0079] Through the above touch signal input circuit, it is convenient to obtain the capacitive signal generated by the user operating the hair dryer and convert it into a signal supported by the subsequent touch display control circuit, thereby facilitating the precise control of each LED in the subsequent LED dot matrix strobe circuit.

[0080] Among them, the capacitive conductive film is usually made of a layer of conductive glass or transparent conductive film, and a conductive coating is applied on it; while the touch signal sampling sub-circuit is usually the electrode provided on the display screen of the hair dryer, which can collect the capacitance change value when the user operates the capacitive conductive film, that is, the capacitive signal. Both the above capacitive conductive film and the electrode are conventional structures in the field of touch screens, and the specific details are not elaborated here.

[0081] Specifically, as Figure 8 shown, the signal input sub-circuit includes a first connector CN1 and ten fifth resistors; the first connector CN1 has eleven pins;

[0082] All 11 pins of the first connector CN1 are electrically connected to the output end of the touch signal sampling sub-circuit; pins 1 to 10 of the first connector CN1 are also respectively and correspondingly electrically connected to the first ends of 10 fifth resistors, and the second ends of the 10 fifth resistors are all electrically connected to the input end of the touch display control circuit; pin 11 of the first connector CN1 is also grounded.

[0083] Through the above signal input sub-circuit, the capacitance signals collected by the touch signal sampling sub-circuit can be converted into touch signals of 8 channels, so that the subsequent touch display control circuit can generate different display driving signals according to the touch signals of 8 channels, so as to facilitate controlling the display of multiple LEDs in the LED dot matrix selection circuit, and further realizing the stepless display of the air blower speed and temperature.

[0084] It should be understood that Figure 8 in, the first connector CN1 has 13 pins, but 2 of them are floating, so only 11 pins play an actual role.

[0085] Preferably, as Figure 9 shown, the display power supply circuit includes a voltage regulator IC chip U1, a voltage regulator diode ZD1, a sixth resistor R15, a sixth capacitor C2 and a seventh capacitor C3;

[0086] The voltage input pin Vi of the voltage regulator IC chip U1 is electrically connected to an external power supply through the sixth resistor R15, the voltage output pin Vo of the voltage regulator IC chip U1 is electrically connected to both the input end of the touch display control circuit and the input end of the display driving circuit, and the ground pin GND of the voltage regulator IC chip U1 is grounded;

[0087] The negative electrode of the voltage regulator diode ZD1 is connected to the common connection end between the sixth resistor R15 and the external power supply, and the positive electrode of the voltage regulator diode ZD1 is grounded; the first end of the sixth capacitor C2 is connected to the common connection end between the voltage input pin Vi of the voltage regulator IC chip U1 and the sixth resistor R15, and the second end of the sixth capacitor C2 is grounded; the first end of the seventh capacitor C3 is connected to the common connection end between the voltage output pin Vo of the voltage regulator IC chip U1 and the input end of the touch display control circuit, and the second end of the seventh capacitor C3 is grounded.

[0088] Through the display power supply circuit with the above structure, the voltage provided by the external power supply (specifically +15V) can be converted into the working voltage required by the touch display control circuit and the display driving circuit (i.e., +5V), ensuring the stability and reliability of the power supply.

[0089] Specifically, asFigure 9 As shown, in this embodiment, the voltage regulator IC chip U1 is specifically selected as the voltage regulator IC of the 78L05 model, and the voltage regulator diode ZD1 is specifically selected as the voltage regulator diode of the BZT52C18-G model. Each resistor and capacitor in the display power supply circuit can select appropriate specifications or product models according to actual situations. For details, please refer to Figure 9 shown, and will not be listed here.

[0090] Preferably, as Figure 3 shown, the hair dryer display device further includes a communication circuit;

[0091] The touch display control circuit is electrically connected to the main control board configured on the hair dryer through the communication circuit.

[0092] Through the communication circuit, it is convenient for the entire hair dryer display device to communicate with the main control board configured on the hair dryer, ensuring that the entire hair dryer can work normally and stably in coordination.

[0093] A heating wire (for heating) and a blower (for blowing) are usually provided on the hair dryer. The main control board configured on the hair dryer refers to the control board used to control the operation of the heating wire and the blower. The above-mentioned heating wire, blower, and main control board are all conventional components of the hair dryer, and specific details will not be elaborated here.

[0094] Specifically, as Figure 10 shown, the communication circuit includes a third connector J1, a seventh resistor R13, and an eighth resistor R14; the third connector J1 has 4 pins;

[0095] All 4 pins of the third connector J1 are electrically connected to the main control board. The 1st pin of the third connector J1 is electrically connected to an external power supply. The 2nd pin and the 3rd pin of the third connector J1 are both electrically connected to the touch display control circuit. The 4th pin of the third connector J1 is grounded.

[0096] For the communication circuit with the above structure, the working voltage of itself can be obtained through the 1st pin of the third connector J1, and data transceiver between the main control board and the touch display control circuit can be realized through the 2nd pin and the 3rd pin, thereby realizing the communication interaction between the hair dryer display device and the main control board configured on the hair dryer.

[0097] Specifically, as Figure 10 and Figure 5 shown, the 2nd pin of the third connector J1 is electrically connected to the 14th pin of the microcontroller U2, and the 3rd pin of the third connector J1 is electrically connected to the 13th pin of the microcontroller U2.

[0098] Similarly, each resistor in the communication circuit can select appropriate specifications or product models according to actual situations. For details, please refer to Figure 10As shown, they are not listed here.

[0099] Embodiment 2

[0100] As Figure 11 shown, a hair dryer includes:

[0101] A machine body;

[0102] A power supply, provided on the machine body;

[0103] And the hair dryer display device in Embodiment 1, provided on the machine body and electrically connected to the power supply.

[0104] The hair dryer of this embodiment can generate corresponding display effects under various mode regulations such as wind speed and temperature, realize stepless regulation and display of temperature and wind speed, effectively avoid circular regulation and display of temperature and wind speed by operating the "+" and "-" touch buttons, and the screen operation and display are both relatively simple and practical, greatly improving the user experience of using the hair dryer.

[0105] Preferably, the hair dryer further includes:

[0106] A heating wire and a blower, both provided on the machine body;

[0107] A main control board, provided on the machine body and electrically connected to the heating wire, the blower, the hair dryer display device and the power supply.

[0108] The working control of the heating wire and the blower can be realized through the main control board.

[0109] The hair dryer display device of this embodiment is the same as that of Embodiment 1. Therefore, for the details not described in this embodiment, please refer to the specific description in Embodiment 1 and Figures 1 to 10 will not be elaborated here.

[0110] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hair dryer display device, characterized in that: It includes a display power supply circuit, a touch signal input circuit, a touch display control circuit, a display drive circuit and an LED dot matrix gating circuit; The input end of the display power supply circuit is electrically connected to an external power supply, the output end of the display power supply circuit is electrically connected to the input end of the touch display control circuit and the input end of the display drive circuit, the input end of the touch display control circuit is electrically connected to the output end of the touch signal input circuit, and the output end of the touch display control circuit is electrically connected to the LED dot matrix selection circuit through the display drive circuit.

2. The hair dryer display device according to claim 1, characterized in that: The touch display control circuit includes a microcontroller U2, a first capacitor C1 and a second capacitor C5; wherein the microcontroller U2 has a plurality of touch channel pins; The positive power supply pin VDD of the microcontroller U2 is electrically connected to the output end of the display power supply circuit, the negative power supply pin VSS of the microcontroller U2 is grounded, the first end of the first capacitor C1 is connected to the common connection end between the positive power supply pin VDD of the microcontroller U2 and the output end of the display power supply circuit, and the second end of the first capacitor C1 is grounded; the first end of the second capacitor C5 is electrically connected to the touch external capacitor pin CMOD of the microcontroller U2, and the second end of the second capacitor C5 is grounded; The 10 touch channel pins in the microcontroller U2 are all electrically connected to the output end of the touch signal input circuit, and the 11th touch channel pin and the 12th touch channel pin of the microcontroller U2 are both electrically connected to the input end of the display driving circuit.

3. The hair dryer display device according to claim 2, characterized in that: The microcontroller U2 is specifically a SC92F8482 model microcontroller.

4. The hair dryer display device according to claim 1, characterized in that: The display driving circuit includes an LED driving chip U3, a first resistor R16, a second resistor R17, a third resistor R18, a fourth resistor R19, a third capacitor C4, a fourth capacitor C6 and a fifth capacitor C7; wherein the LED driving chip U3 has 8 segment selection pins and at least 8 bit selection pins; The positive power supply pin VDD of the LED driver chip U3 is electrically connected to the output end of the display power supply circuit, the first end of the third capacitor C4 is connected to the common connection end between the positive power supply pin VDD of the LED driver chip U3 and the output end of the display power supply circuit, and the second end of the third capacitor C4 is grounded; the negative power supply pin VSS of the LED driver chip U3 is grounded; The 8 segment selection pins and at least 8 bit selection pins of the LED driver chip U3 are all electrically connected to the LED dot matrix selection circuit; the data input pin DIN of the LED driver chip U3 is electrically connected to the output end of the touch display control circuit through the third resistor R18, and the data input pin DIN of the LED driver chip U3 is also electrically connected to the output end of the display power supply circuit through the first resistor R16; the clock input pin SCLK of the LED driver chip U3 is electrically connected to the output end of the touch display control circuit through the fourth resistor R19, and the clock input pin SCLK of the LED driver chip U3 is also electrically connected to the output end of the display power supply circuit through the second resistor R17; the first end of the fourth capacitor C6 is connected to the common connection end between the data input pin DIN of the LED driver chip U3 and the first resistor R16, and the second end of the fourth capacitor C6 is grounded; the first end of the fifth capacitor C7 is connected to the common connection end between the clock input pin SCLK of the LED driver chip U3 and the second resistor R17, and the second end of the fifth capacitor C7 is grounded.

5. The hair dryer display device according to claim 4, characterized in that: The LED dot matrix gating circuit includes 8 LED dot matrices, and the 8 LED dot matrices correspond one-to-one to the 8 segment selection pins of the LED driver chip U3; In each of the LED dot matrices, each of the LED dot matrices includes multiple LEDs, and the anodes of all the LEDs are connected together and electrically connected to a corresponding segment selection pin in the LED driver chip U3; the cathode of each LED is electrically connected to one of the bit selection pins of the LED driver chip U3, and the bit selection pins connected to the cathode of each LED are different.

6. The hair dryer display device according to claim 1, characterized in that: The touch signal input circuit includes a touch signal sampling subcircuit and a signal input subcircuit; The input end of the touch signal sampling subcircuit is electrically connected to the capacitive conductive film provided on the hair dryer, and the output end of the touch signal sampling subcircuit is electrically connected to the input end of the touch display control circuit through the signal input subcircuit.

7. The hair dryer display device according to claim 6, characterized in that: The signal input subcircuit includes a first connector CN1 and 10 fifth resistors; the first connector CN1 has 11 pins; The 11 pins of the first connector CN1 are all electrically connected to the output end of the touch signal sampling subcircuit; pins 1 to 10 of the first connector CN1 are also electrically connected to the first ends of the 10 fifth resistors in a one-to-one correspondence, and the second ends of the 10 fifth resistors are all electrically connected to the input end of the touch display control circuit; pin 11 of the first connector CN1 is also grounded.

8. The hair dryer display device according to claim 1, characterized in that: The display power supply circuit includes a voltage stabilizing IC chip U1, a voltage stabilizing diode ZD1, a sixth resistor R15, a sixth capacitor C2 and a seventh capacitor C3; The voltage input pin Vi of the voltage stabilizing IC chip U1 is electrically connected to an external power supply through the sixth resistor R15, the voltage output pin Vo of the voltage stabilizing IC chip U1 is electrically connected to the input end of the touch display control circuit and the input end of the display driving circuit, and the ground pin GND of the voltage stabilizing IC chip U1 is grounded; The cathode of the voltage stabilizing diode ZD1 is connected to the common connection end between the sixth resistor R15 and the external power supply, and the anode of the voltage stabilizing diode ZD1 is grounded; the first end of the sixth capacitor C2 is connected to the common connection end between the voltage input pin Vi of the voltage stabilizing IC chip U1 and the sixth resistor R15, and the second end of the sixth capacitor C2 is grounded; the first end of the seventh capacitor C3 is connected to the common connection end between the voltage output pin Vo of the voltage stabilizing IC chip U1 and the input end of the touch display control circuit, and the second end of the seventh capacitor C3 is grounded.

9. The hair dryer display device according to any one of claims 1 to 8, further comprising a communication circuit; The touch display control circuit is electrically connected to a main control board configured on the hair dryer through the communication circuit.

10. A hair dryer, characterized in that: include: Machine body; A power supply, provided on the machine body; And a hair dryer display device as described in any one of claims 1 to 9, which is arranged on the machine body and is electrically connected to the power supply.

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