Display circuit, display assembly, control panel and electronic equipment

Abstract

The invention discloses a display circuit, a display assembly, a control panel and electronic equipment, and relates to the technical field of digital display, the display circuit comprises a display control circuit, at least one display unit, a data port, a clock port, a power supply port and at least one bit selection port which are integrated on the same circuit board; the power supply port is connected with a power supply, and the data port is used for inputting serial data to the display control circuit; the clock port is used for providing a clock signal for the display control circuit; the output end of the display control circuit is connected with each display unit, the display units are connected with the bit selection ports in a one-to-one correspondence mode, and the bit selection ports are used for inputting bit selection signals so as to select a target display unit and enable the target display unit to display. According to the technical scheme, the technical problem that an existing display circuit is low in integration level is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of digital display, and in particular to a display circuit, a display component, a control panel, and an electronic device. Background Art

[0002] In the related art, a display component composed of a light emitting diode (LED) is usually used to display information, such as a digital tube. For example, eight LEDs are arranged in an 8-shaped shape on a circuit board and then a plastic 8-shaped mold is added to form an 8-shaped LED display unit.

[0003] In the prior art, the pins corresponding to the eight LEDs are generally brought out and connected to a scanning control circuit disposed outside the digital tube, thereby controlling the light emission of the LEDs in the digital tube. On the one hand, this results in a low integration of the digital tube, a large circuit board area of ​​the peripheral circuit, and high cost; on the other hand, this results in a large number of pins brought out of the digital tube and low port utilization. Summary of the invention

[0004] The main purpose of the present invention is to provide a display circuit, a display component, a control panel, and an electronic device, aiming to solve the technical problem of low integration of existing display circuits.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present invention proposes a display circuit, comprising: a display control circuit, at least one display unit, a data port, a clock port, a power supply port and at least one bit select port integrated on the same circuit board; the data port, the clock port, the power supply port and the at least one bit select port are respectively connected to the display control circuit; the power supply port is connected to a power supply, and the data port is used to input serial data to the display control circuit; the clock port is used to provide a clock signal for the display control circuit; the output end of the display control circuit is respectively connected to each display unit, the display unit and the bit select port are connected one-to-one, and the bit select port is used to input a bit select signal to select a target display unit so that the target display unit is displayed.

[0006] Optionally, the display control circuit includes a serial-in-parallel-out control circuit and at least one bit selection control module; the serial-in-parallel-out control circuit is respectively connected to the data port, the clock port, the power supply port and the output port through different nodes; the number of the bit selection control modules, the bit selection ports and the display units is the same, the first end of each bit selection control module is respectively connected to each bit selection port in a one-to-one correspondence, the second end of each bit selection control module is respectively connected to each display unit in a one-to-one correspondence, and the third end of each bit selection control module is connected to the power supply port.

[0007] Optionally, a first filtering module is arranged between the serial-in-parallel-output control circuit and the data port, a second filtering module is arranged between the serial-in-parallel-output control circuit and the clock port, and a first brightness adjustment module is arranged on the connection line between the output end of the serial-in-parallel-output control circuit and each display unit.

[0008] Optionally, the bit selection control module includes a selection element; for each bit selection control module, the first end of the selection element is connected to the power supply port, the second end of the selection element is connected to the bit selection port corresponding to the bit selection control module, and the third end of the selection element is connected to the display unit corresponding to the bit selection port; a first resistor is also arranged between the second end of the selection element and the connected bit selection port, and a second resistor is also arranged between the first resistor and the first end of the selection element.

[0009] Optionally, the power supply port includes a positive power port; the display unit includes a plurality of light-emitting diodes, anodes of the plurality of light-emitting diodes are connected to the third end of the selection element, and cathodes of the plurality of light-emitting diodes are connected to the output end of the serial input and parallel output control circuit; the first end of the selection element is connected to the positive power port.

[0010] Optionally, the power supply port includes a ground port; the display unit includes a plurality of light-emitting diodes, the cathodes of the plurality of light-emitting diodes are all connected to the third end of the selection element, and the anodes of the plurality of light-emitting diodes are all connected to the output end of the serial input and parallel output control circuit; the first end of the selection element is connected to the ground port.

[0011] Optionally, the power supply port is further connected to a second brightness adjustment module, an input end of the second brightness adjustment module is connected to a power supply, and an output end of the second brightness adjustment module is connected to the power supply port.

[0012] Optionally, the second brightness adjustment module includes any one of the following devices: an adjustment resistor; a voltage regulator diode; a linear regulator; and a constant current output chip.

[0013] Optionally, the power supply includes multiple power supplies with different voltage ranges, the second brightness adjustment module includes multiple sub-adjustment units, the input end of each sub-adjustment unit is respectively connected to a different power supply, and the output end of each sub-adjustment unit is connected to each selection control module in the display control circuit.

[0014] Optionally, the second brightness adjustment module includes multiple, and the second brightness adjustment modules correspond one-to-one to the bit selection control modules in the display control circuit. The input ends of each sub-adjustment unit in each second brightness adjustment module are respectively connected to different power supplies, and each power supply has a different voltage range. The output ends of each sub-adjustment unit in each second brightness adjustment module are respectively connected to the corresponding bit selection control module.

[0015] Optionally, the display control circuit is integrated in a first chip, and the first chip is disposed on the circuit board and is electrically connected to the display unit, the data port, the clock port and at least one bit selection port.

[0016] Optionally, the second brightness adjustment module is integrated in a second chip, and the second chip is disposed on the circuit board and electrically connected to the power supply port.

[0017] In a second aspect, this embodiment further provides a display assembly, comprising a housing and the display circuit described in part of the first aspect, wherein the display circuit is disposed in the housing.

[0018] In a third aspect, this embodiment further provides a display assembly, comprising a housing and the display circuit described in another part of the first aspect, wherein the display circuit is disposed in the housing.

[0019] In the fourth aspect, the present embodiment further provides a control board, comprising a microcontroller and the display component described in the second aspect, wherein the microcontroller is connected to a data port, a clock port and at least one bit selection port of the display circuit; the control board also comprises a third brightness adjustment module, wherein an input end of the third brightness adjustment module is connected to a power supply, and an output end of the third brightness adjustment module is connected to the display component; the third brightness adjustment module is the second brightness adjustment module described in any one of the other parts of the first aspect.

[0020] In a fifth aspect, this embodiment further provides a control board, which includes a microcontroller and the display component described in the third aspect, and the microcontroller is connected to a data port, a clock port and at least one bit selection port of the display circuit.

[0021] In a sixth aspect, this embodiment further provides an electronic device, comprising the control board described in the fourth aspect or the fifth aspect.

[0022] In the technical solution of the present invention, a display circuit is provided. The display circuit is used as an internal circuit of a digital tube. The display circuit includes a display control circuit, at least one display unit, a data port, a clock port, a power supply port and at least one bit selection port integrated on the same circuit board. The display control circuit and the display unit can be integrated on the same circuit board. The circuit board is arranged in the cavity of the digital tube mold, and the peripheral control circuit can be integrated inside the digital tube to improve the integration of the digital tube. In addition, the external port of the circuit board includes a data port, a clock port, a power supply port and at least one bit selection port, which significantly reduces the external port of the circuit board. Among them, the display unit and the bit selection port are connected one by one, and the bit selection port is used to input the bit selection signal, and the bit selection signal is used to drive the target display unit to display. It can be seen that it is only necessary to increase or decrease the number of bit selection ports according to the number of display units, and there is no need to lead out each pin of each display unit, which reduces the external port of the circuit board, improves the port utilization rate, and reduces the connection line between the digital tube and the external circuit, so it will also reduce the circuit board area of ​​the peripheral circuit, greatly improving the integration of the digital tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram showing the structure of a display circuit provided by this embodiment is shown;

[0025] Figure 2 Another schematic structural diagram of a display circuit provided by this embodiment is shown;

[0026] Figure 3 A schematic diagram showing the structure of the bit selection control module provided in this embodiment is shown;

[0027] Figure 4 Provide a connection diagram of a common anode display unit;

[0028] Figure 5 Another structural schematic diagram of the bit selection control module provided in this embodiment is shown;

[0029] Figure 6 Provided is a connection schematic diagram of a common cathode display unit;

[0030] Figure 7 Another schematic diagram showing the display circuit provided by this embodiment;

[0031] Figure 8 Another schematic diagram of the display circuit provided by this embodiment is shown;

[0032] Fig. 9 Another schematic diagram showing the display circuit provided by this embodiment;

[0033] Fig.10 A schematic diagram of the circuit board layout provided by this embodiment is shown;

[0034] Fig.11 Another schematic diagram showing the layout of the circuit board provided by this embodiment;

[0035] Fig.12 A schematic diagram showing a display assembly provided in this embodiment;

[0036] Fig.13 Another schematic diagram showing the display assembly provided by this embodiment;

[0037] Fig.14 A schematic diagram showing a control panel provided in this embodiment is shown;

[0038] Fig.15 Another schematic diagram of the control panel provided in this embodiment is shown.

[0039] Description of Figure Numbers:

[0040] Circuit board 10, display control circuit 101, display unit 102, data port 104, clock port 103, power supply port 105, bit selection port 106, serial input and parallel output control circuit 201, selection control module 202, first brightness adjustment module 203, second brightness adjustment module 204, sub-adjustment unit 205, selection element 301, first chip 401, second chip 402, first display component 501, second display component 502, control board 600, microcontroller 601, third brightness adjustment module 602.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0047] A digital tube usually includes a mold, an LED chip, pins, and epoxy glue. The LED chip is set in the mold cavity. After the mold is filled with epoxy glue, the multiple light-emitting diodes of the LED chip are connected to the external control circuit through pins. Taking a 2-digit digital tube as an example, a 2-digit digital tube includes two 8-digit LEDs. The two LEDs share 8 segment selection pins (A, B, C, D, E, F, G, DP), plus two common pins, so a 2-digit digital tube requires 10 pins. As the number of digits of the digital tube increases, the more pins it has, the more connecting wires the digital tube has with the peripheral control circuit, and the low utilization rate of the digital tube port, which makes the circuit board area of ​​the peripheral circuit larger. In addition, there is a circuit board inside the digital tube (such as the internal circuit board of the digital tube for integrating LED chips), resulting in the PCB inside the digital tube not being fully utilized, and the integration of the digital tube is low.

[0048] Based on the above problems, the embodiment of the present application provides a display circuit, which is used as an internal circuit of a digital tube. The display circuit includes a display control circuit, at least one display unit, a data port, a clock port, a power supply port and at least one bit selection port integrated on the same circuit board, which can realize the integration of the display control circuit and the display unit (such as 8-character LED) on the same circuit board. The circuit board is arranged in the cavity of the digital tube mold, which can realize the integration of the peripheral control circuit inside the digital tube, thereby improving the integration of the digital tube. In addition, the external port of the circuit board includes a data port, a clock port, a power supply port and at least one bit selection port, which significantly reduces the external port of the circuit board. Among them, the display unit and the bit selection port are connected one by one, and the bit selection port is used to input the bit selection signal, and the bit selection signal is used to drive the target display unit to display. It can be seen that it is only necessary to increase or decrease the number of bit selection ports according to the number of display units, and it is not necessary to lead out each LED pin of each display unit, thereby reducing the external port of the circuit board, improving the port utilization rate, and reducing the connection line between the digital tube and the external circuit, so it will also reduce the circuit board area of ​​the peripheral circuit, greatly improving the integration of the digital tube.

[0049] The embodiments of the present invention provide a display circuit, a display component, a control board, and an electronic device. The electronic device may be a power-consuming device suitable for various display circuits. The electronic device is provided with a control board, a display component is installed on the control board, and a display circuit is provided in the display component.

[0050] Figure 1 A schematic diagram of the structure of a display circuit provided by this embodiment is shown. Figure 1 As shown, the display circuit includes: a display control circuit 101, at least one display unit 102, a data port 104, a clock port 103, a power supply port 105 and at least one bit selection port 106 integrated on the same circuit board 10. In this way, the display control circuit 101 and the display unit 102 are integrated on the same circuit board 10, which can greatly improve the integration level, and the integrated circuit board only includes the data port 104, the clock port 103, the power supply port 105 and at least one bit selection port 106 to the outside, which can greatly reduce the number of external connection ports of the circuit board, and can also reduce the number of external connection lines, and further can reduce the circuit board area of ​​the peripheral circuit of the display circuit.

[0051] In this embodiment, the data port 104, the clock port 103, the power supply port 105, and at least one bit selection port 106 are connected to the display control circuit 101 through different ports, respectively. The power supply port 105 is connected to the power supply, and the data port 104 is used to input serial data to the display control circuit 101; the clock port 103 is used to provide a clock signal for the display control circuit 101, and the bit selection port 106 is used to input a bit selection signal to select a target display unit so that the target display unit displays. The target display unit can be any one or more display units. In this way, the display control circuit 101 can be provided with various signals and power required to control the display unit 102.

[0052] Among them, the serial data, clock signal, and bit selection signal can all be provided by the microcontroller MCU (Microcontroller Unit), that is, the data port 104, clock port 103, and bit selection port 106 of the circuit are connected to the MCU, wherein the power supply port 105 can also be connected to the MCU, thereby providing an operating voltage for the display control circuit 101.

[0053] In this embodiment, the output end of the display control circuit 101 is connected to each display unit 102, and is used to control each display unit 102 to display corresponding content. The display units 102 and the bit selection ports 106 are connected one by one, and the bit selection signals of the bit selection ports 106 can drive each display unit 102 to display.

[0054] The above-mentioned embodiment can significantly reduce the external ports of the circuit board 10, and it is only necessary to increase or decrease the number of the bit selection ports 106 according to the number of the display units 102, without leading out each LED pin of each display unit 102, thereby reducing the external ports of the circuit board, improving the port utilization rate, and reducing the connection lines between the digital tube and the external circuit, thereby reducing the circuit board area of ​​the peripheral circuit, and greatly improving the integration of the digital tube.

[0055] Figure 2 Another structural schematic diagram of a display circuit provided by this embodiment is shown as follows: Figure 2 As shown, the display control circuit 101 includes a serial-in-parallel-out control circuit 201 and at least one bit selection control module 202; the serial-in-parallel-out control circuit 201 is respectively connected to the data port 104, the clock port 103, the power supply port 105 and the output end through different nodes; the number of the bit selection control modules 202, the bit selection ports 106 and the display units 102 is the same, the first end of each bit selection control module 202 is respectively connected to each bit selection port 106 in a one-to-one correspondence, the second end of each bit selection control module 202 is respectively connected to each display unit 102 in a one-to-one correspondence, and the third end of each bit selection control module 202 is connected to the power supply port 105.

[0056] The serial input parallel output control circuit 201 can convert serial input data bit by bit into parallel output data, and then control the display of multiple display units 102. The serial input parallel output control circuit 201 can receive serial data sent by the MCU through the data port 104, receive the clock signal sent by the MCU through the clock port 103, and provide the serial input parallel output control circuit 201 with an operating voltage through the power supply port 105. The serial input parallel output control circuit 201 is, for example, a serial input parallel output chip including a shift register.

[0057] In this embodiment, the number of the bit selection control modules 202, the bit selection ports 106 and the display units 102 is the same, the first end of each bit selection control module 202 is connected to different bit selection ports 106 in a one-to-one correspondence, and the second end of each bit selection control module 202 is connected to different display units 102 in a one-to-one correspondence, so that the MCU inputs the bit selection signal into the bit selection control module 202 through the bit selection port 106, the bit selection control module 202 selects the display unit 102 to be displayed currently according to the bit selection signal, and outputs the parallel data to the display unit 102, so that the selected display unit 102 displays the corresponding number or character according to the parallel data.

[0058] The third end of each selection control module 202 is connected to the power supply port 105. Figure 2 The power supply VCC port in the circuit further provides the operating voltage for each selection control module 202.

[0059] like Figure 2 As shown, the display circuit includes two display units 102, each display unit 102 corresponds to a bit selection control module 202 (bit selection control module 1, bit selection control module 2), and each display unit 102 corresponds to its own bit selection port 106 (COM1 bit selection port, COM2 bit selection port).

[0060] The display circuit of this embodiment realizes efficient control of multiple display units 102 through the integrated serial-in-parallel-out control circuit 201 and the bit selection control module 202. The display content of each display unit 102 can be flexibly controlled through serial data input and bit selection signals, and is suitable for a variety of display applications.

[0061] In an embodiment of the present application, a first filtering module is arranged between the serial-in-parallel-output control circuit 201 and the data port 104, a second filtering module is arranged between the serial-in-parallel-output control circuit 201 and the clock port 103, and a first brightness adjustment module 203 is arranged on the connection line between the output end of the serial-in-parallel-output control circuit 201 and each display unit 102.

[0062] like Figure 2As shown, the first filter module includes R9 and C1, one end of R9 is connected to the clock port 103, the other end of R9 is connected to the serial input and parallel output control circuit 201, the other end of R9 is also connected to one end of C1, and the other end of C1 is grounded. The second filter module includes R10 and C2, one end of R10 is connected to the data port 104, the other end of R10 is connected to the serial input and parallel output control circuit 201, the other end of R10 is also connected to one end of C2, and the other end of C2 is grounded. The first filter module and the second filter module are used to improve the anti-interference ability of the circuit for noise in the input clock signal or serial data.

[0063] The serial-in parallel-out control circuit 201 also has a power ground GND port for grounding, wherein C3 is arranged between the power VCC port and the power ground GND port for filtering the power signal.

[0064] A first brightness adjustment module 203 is provided on the connection line between the output end of the serial-in-parallel-out control circuit 201 and each display unit 102 , which can limit and adjust the output signal current or voltage of the serial-in-parallel-out control circuit 201 , thereby controlling the brightness of the display unit 102 .

[0065] In one example, the first brightness adjustment module 203 may be a resistor, such as Figure 2 The resistors R1-R8 in the figure are current and brightness adjustment resistors. R1-R8 are respectively connected to the pins (A, B, C, D, E, F, G, DP) of the display unit 102 to achieve brightness adjustment by adjusting the current entering and outputting the control circuit and the diode lines of each display unit 102.

[0066] It is understandable that the resistor as the first brightness adjustment module 203 has the advantages of simple structure and low cost, and is suitable for simple display systems, but has limited brightness adjustment. Therefore, in an example, the first brightness adjustment module 203 can also be a Zener diode, a linear regulator, or a constant current output chip.

[0067] The voltage stabilizing diode operates in the reverse breakdown region, and its reverse breakdown voltage is stable, which can ensure the voltage stability of the display unit 102. By adjusting the current flowing through the voltage stabilizing diode, the brightness of the display unit 102 can be indirectly controlled. It is suitable for voltage-sensitive display units 102, and scenarios where voltage stability is required.

[0068] The linear regulator adjusts the output voltage through feedback to ensure the output voltage is stable. By adjusting the output voltage, the current flowing through the display unit 102 can be controlled, thereby adjusting the brightness. It is suitable for display systems that require high-precision voltage regulation and scenarios with high voltage stability requirements.

[0069] The constant current output chip ensures constant output current through an internal feedback circuit. By adjusting the output current, the brightness of the display unit 102 can be accurately controlled. It is suitable for display systems that require accurate brightness control.

[0070] The above embodiment provides an internal structure of a serial-in-parallel-out control circuit 201 and connections between each structure and the display unit 102 , which can realize data output and display control of the display unit 102 .

[0071] In the embodiment of the present application, the bit selection control module 202 includes a selection element 301; for each bit selection control module 202, the first end of the selection element 301 is connected to the power supply port 105, the second end of the selection element 301 is connected to the bit selection port corresponding to the bit selection control module 202, and the third end of the selection element 301 is connected to the display unit 102 corresponding to the bit selection port; a first resistor is also arranged between the second end of the selection element 301 and the connected bit selection port, and a second resistor is also arranged between the first resistor and the first end of the selection element 301.

[0072] In this embodiment, the gating element 301 may be a semiconductor device with a gating function, such as a BJT transistor, a field effect transistor, an insulated gate bipolar transistor, etc.

[0073] Figure 3 The schematic diagram of the structure of the bit selection control module provided in this embodiment is shown. The first end of the selection element 301 is connected to the power supply port 105 (eg Figure 3 The VCC in the figure can provide a driving voltage for the gating element 301. The second end of the gating element 301 is connected to the bit selection port (such as VCC in the figure) corresponding to the bit selection control module 202. Figure 3 The port connected to the MCU in the middle) can receive the bit selection signal sent by the MCU, and the third end of the gating element 301 is connected to the display unit 102 corresponding to the bit selection port (such as Figure 3 COM terminal in the display unit 102), the bit selection signal can be transmitted to the corresponding display unit 102 when the selection element 301 is turned on.

[0074] like Figure 3 As shown, a first resistor R1 is further provided between the second end of the gating element 301 and the connected bit selection port, and a second resistor R2 is further provided between the first resistor R1 and the first end of the gating element 301. The first resistor R1 and the second resistor R2 form a voltage divider network, which can make the gate voltage of the gating element 301 within a safe range, and can reduce noise and interference in the signal transmission process, and improve the signal stability.

[0075] In this embodiment, the power supply port 105 includes a positive power supply port, such as Figure 2The display unit 102 includes a plurality of light-emitting diodes, anodes of the plurality of light-emitting diodes are connected to the third end of the selection element 301, cathodes of the plurality of light-emitting diodes are connected to the output end of the serial input and parallel output control circuit 201; a first end of the selection element 301 is connected to the positive power port VCC.

[0076] That is to say, the multiple light emitting diodes of this embodiment constitute a common anode display unit. Figure 4 As shown, Figure 4 A connection diagram of a common anode display unit is provided, wherein the anodes of the light-emitting diodes of each display unit are connected to each other, and the cathodes of multiple light-emitting diodes are connected in series and in parallel to the output end of the control circuit 201 through segment selection pins (A, B, C, D, E, F, G, DP).

[0077] The bit selection control module 202 provided in this embodiment can be applicable to the application scenario of the common anode display unit.

[0078] In this embodiment, the power supply port 105 includes a ground port, such as Figure 2 Middle power ground GND interface. Figure 5 Another structural diagram of the bit selection control module provided in this embodiment is shown as follows: Figure 5 As shown, the display unit includes multiple light-emitting diodes, the cathodes of the multiple light-emitting diodes are connected to the third end of the selection element 301, and the anodes of the multiple light-emitting diodes are connected to the output end of the serial input and output control circuit 201; the first end of the selection element 301 is connected to the ground port GND.

[0079] That is to say, the plurality of light emitting diodes of this embodiment constitute a common cathode display unit. Figure 6 As shown, Figure 6 A connection diagram of a common cathode display unit is provided, wherein the cathodes of the light-emitting diodes of each display unit are connected to each other, and the anodes of multiple light-emitting diodes are connected in series and in parallel to the output end of the control circuit 201 through segment selection pins (A, B, C, D, E, F, G, DP).

[0080] The bit selection control module 202 provided in this embodiment can be applicable to the application scenario of the common cathode display unit, thereby improving the application scenario of the display circuit of this embodiment.

[0081] In one example, in order to further expand the application scenario of this embodiment, based on the display circuit provided in the above embodiment ( Figure 2 The display circuit shown in FIG. 1 is a display circuit shown in FIG. 1 . The present embodiment provides a display circuit as shown in FIG. Figure 7 The display circuit shown, Figure 7 Another schematic diagram of the display circuit provided in this embodiment is shown. Figure 7As shown, the power supply port 105 of this embodiment is also connected to a second brightness adjustment module 204 , the input end of the second brightness adjustment module 204 is connected to the power supply, and the output end of the second brightness adjustment module 204 is connected to the power supply port 105 .

[0082] It should be noted that, for the sake of distinction, Figure 7 In the figure, the power supply port 105 connected to the bit selection module is identified as the bit selection module power supply port, and the power supply port connected to the serial input and parallel output control circuit 201 is identified as the power supply VCC port. In fact, the power supply VCC port and the bit selection module power supply port can be connected to different power supplies respectively, or can be connected to the same power supply (such as Figure 8 to further improve the integration level.

[0083] like Figure 2 As shown, the display control circuit 101 is arranged on the circuit board. Since the first brightness adjustment module 203 in the display control circuit 101 is encapsulated in the display component, each manufacturer or usage scenario has different brightness requirements. In order to further expand the application scenario of the display circuit of the embodiment of the present application and meet the brightness requirements of different scenarios, the present embodiment further sets a second brightness adjustment module 204 at the power supply port of the position selection control circuit. The second brightness adjustment module 204 can be encapsulated in the display component or set on the peripheral circuit of the display component. The specific setting position can be customized according to the scene requirements.

[0084] In this embodiment, the second brightness adjustment module 204 includes any one of the following components: an adjustment resistor; a voltage regulator diode; a linear regulator; and a constant current output chip.

[0085] Specifically, the regulating resistor as the second brightness regulating module 204 has the advantages of simple structure and low cost.

[0086] The voltage regulator diode works in the reverse breakdown region, and its reverse breakdown voltage is stable, which can ensure the voltage stability of the bit selection control module 202. By adjusting the current flowing through the voltage regulator diode of the second brightness adjustment module 204, the brightness of the display unit can be indirectly controlled. It is suitable for voltage-sensitive display units and scenarios where voltage stability is required.

[0087] The linear regulator adjusts the output voltage through feedback to ensure the output voltage is stable. By adjusting the output voltage, the current flowing through the display unit can be controlled, thereby adjusting the brightness. It is suitable for display systems that require high-precision voltage regulation and scenarios with high requirements for voltage stability.

[0088] The constant current output chip ensures constant output current through the internal feedback circuit. By adjusting the output current, the brightness of the display unit can be accurately controlled. It is suitable for display systems that require precise brightness control.

[0089] This embodiment provides a variety of alternative solutions for the second brightness adjustment module 204, which can be customized according to cost requirements or brightness adjustment accuracy, and are not specifically limited here.

[0090] In the embodiment of the present application, in order to further expand the application scenarios of the present embodiment, multiple power supply scenarios can also be adapted to meet multiple power supply requirements.

[0091] Figure 8 Another schematic diagram of the display circuit provided in this embodiment is shown. Figure 8 As shown, specifically, the power supply includes multiple power supplies with different voltage ranges (power supply VCC1, power supply VCC2), the second brightness adjustment module 204 includes multiple sub-adjustment units 205 (VCC1 brightness adjustment sub-unit, VCC2 brightness adjustment sub-unit), the input end of each sub-adjustment unit 205 is respectively connected to a different power supply, and the output end of each sub-adjustment unit 205 is connected to each selection control module 202 in the display control circuit 101.

[0092] like Figure 8 In the embodiment, the first end of the VCC1 brightness adjustment subunit is connected to the power supply VCC1, and the second end of the VCC1 brightness adjustment subunit is respectively connected to the position selection control module 1 and the position selection control module 2. The first end of the VCC2 brightness adjustment subunit is connected to the power supply VCC2, and the second end of the VCC2 brightness adjustment subunit is respectively connected to the position selection control module 1 and the position selection control module 2.

[0093] The power supply voltages of the power supply VCC1 and the power supply VCC2 are different, so that the display circuit can adapt to multiple power supply scenarios, and the brightness parameters adapted to the power supply can be set in advance in the second brightness adjustment module 204. During use, the brightness adjustment path corresponding to the target power supply can be used. For example, the power supply VCC1 is 3.3V, the power supply VCC2 is 5V, the brightness corresponding to the power supply VCC1 is the first brightness, and the VCC1 brightness adjustment subunit includes an adjustment resistor. Then, according to the first brightness requirement, the adjustment resistor value in the VCC1 brightness adjustment subunit is set in advance to correspond to 3.3V. When the display circuit needs to be connected to a 3.3V power supply, it is only necessary to connect the power supply VCC1 of the display circuit to a 3.3V power supply.

[0094] The display circuit provided in the above embodiment can also integrate the second brightness adjustment module 204 on the circuit board, that is, the display control circuit 101, the display unit 102, and the second brightness adjustment module 204 can be integrated on the same circuit board, while improving the integration level, it can also meet the multi-power application scenario requirements of the display circuit.

[0095] Fig. 9Another schematic diagram of the display circuit provided in this embodiment is shown. Fig. 9 As shown, the second brightness adjustment module 204 includes multiple second brightness adjustment modules 204, and the second brightness adjustment modules 204 correspond one-to-one to the bit selection control modules 202 in the display control circuit. The input ends of each sub-adjustment unit 205 in each second brightness adjustment module 204 are respectively connected to different power supplies, and each power supply has a different voltage range. The output ends of each sub-adjustment unit 205 in each second brightness adjustment module 204 are respectively connected to the corresponding bit selection control module 202.

[0096] continue Figure 8 In the embodiment, assuming that the power supply VCC1 is turned on, the brightness parameter (such as the resistance value) set in the VCC1 brightness adjustment subunit is fixed, that is, the display effect of each display unit 102 is the same. In order to further improve the display control accuracy, this embodiment Fig. 9 Each bit selection control module 202 is connected to a second brightness adjustment module 204 , and each bit selection control module 202 corresponds to a display unit 102 , that is, each second brightness adjustment module 204 corresponds to each display unit 102 , so that each display unit 102 can be controlled individually.

[0097] like Fig. 9 As shown, the bit selection control module 1 and the bit selection control module 2 each correspond to their own second brightness adjustment module 204, each second brightness adjustment module 204 is connected to the power supply VCC1 and the power supply VCC2, the power supply voltages of the power supply VCC1 and the power supply VCC2 are different, and each second brightness adjustment module 204 includes a VCC1 brightness adjustment subunit and a VCC2 brightness adjustment subunit.

[0098] In an application scenario, for example, the power supply VCC1 is 3.3V. When the display circuit needs to be connected to a 3.3V power supply, the resistance value of the adjustment resistor in the VCC1 brightness adjustment subunit connected to the bit selection control module 1 can be set to a first resistance value, and the resistance value of the adjustment resistor in the VCC1 brightness adjustment subunit connected to the bit selection control module 2 can be set to a second resistance value. This allows the current of the circuit where the bit selection control module 1 is located to be different from the current of the bit selection control module 2, thereby making different display units 102 have different brightness, further meeting different brightness requirements of different display units 102. That is to say, this embodiment can meet both different brightness requirements of different display units 102 and different power supply requirements.

[0099] In the embodiment of the present application, the display control circuit is integrated in a first chip, the first chip is disposed on a circuit board, and is electrically connected to the display unit 102, the data port 104, the clock port 103 and at least one bit selection port.

[0100] like Figure 2 As shown, the serial-in-parallel-out control circuit 201 and at least one bit selection control module 202 included in the display control circuit can be respectively arranged on a circuit board.

[0101] Fig.10 The schematic diagram of the circuit board layout provided in this embodiment is shown as follows: Fig.10 As shown, the display control circuit included in the display control circuit can be integrated into the first chip 401, that is, the serial-input-parallel-output control circuit 201 and at least one bit selection control module 202 included in the display control circuit can be integrated into the same chip to obtain the first chip 401, and then the first chip 401 is set on the circuit board. The first chip 401 is electrically connected to the display unit 102, the data port 104, the clock port 103 and the at least one bit selection port, and the effect shown in the above embodiment can also be achieved. In this way, further integration of the circuit board can be achieved.

[0102] Fig.11 Another schematic diagram showing the layout of the circuit board provided in this embodiment is shown as follows: Fig.11 As shown, the second brightness adjustment module 204 is integrated in the second chip 402 , and the second chip 402 is disposed on a circuit board and electrically connected to the power supply port.

[0103] That is to say, this embodiment can Figure 7 or Figure 8 or Fig. 9 The second brightness adjustment module 204 is integrated in the second chip 402, and the second chip 402 is also arranged on the circuit board. In this way, not only the integration of the display circuit can be further improved, but also the integrated display circuit can be applied to multiple power supplies, brightness adjustment and other scenarios. In addition, this highly integrated display circuit can also reduce the connection harness with the peripheral circuit of the display circuit, reduce the circuit board area of ​​the peripheral circuit, and reduce the cost.

[0104] Fig.12 A schematic diagram of a display assembly provided in this embodiment is shown, Fig.12 As shown, the display component (such as Fig.12 The first display assembly 501) includes a housing and Figure 1 , Figure 2 or Fig.10 The display circuit shown is arranged in a housing.

[0105] Taking the display component as a 2-digit digital tube as an example, the shell of the display component includes a mold, which will be integrated with Figure 1 or Figure 2The circuit board of the display circuit is arranged in the mold, and then the mold is poured with epoxy glue, and a data port 104, a clock port 103, a power supply port and at least one bit selection port pin are reserved.

[0106] In this way, after the display assembly is glued, the display control circuit of this embodiment, that is, the serial input and parallel output control circuit 201 and at least one bit selection control module 202 are all encapsulated in the digital tube, which can improve the three-proof effect (moisture-proof, salt spray-proof, and mildew-proof) of the display circuit. It can also greatly reduce the output port of the digital tube and improve the port utilization rate.

[0107] Fig.13 Another schematic diagram of the display assembly provided in this embodiment is shown as follows: Fig.13 As shown, the display component (such as Fig.13 The second display assembly 502) includes a housing and Figure 7 or Figure 8 or Fig. 9 or Fig.11 The display circuit shown is arranged in a housing.

[0108] and Fig.12 The difference between the display components shown is that the display component of this embodiment includes a second brightness adjustment module 204, so that the functions of the display component, such as a digital tube, are more abundant, further improving the applicable scenarios of the display component.

[0109] The specific structure of the display circuit in the display component refers to the above embodiments. Since the display component adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0110] Fig.14 A schematic diagram of the control panel provided in this embodiment is shown, Fig.14 As shown, the control board 600 includes a microcontroller 601 and Fig.12 The first display component 501 shown, the microcontroller 601 is connected to the data port 104, the clock port 103 and at least one bit selection port of the display circuit (not shown in the figure); the control board also includes a third brightness adjustment module 602, the input end of the third brightness adjustment module 602 is connected to the power supply, and the output end of the third brightness adjustment module 602 is connected to the display component (the first display component 501); the third brightness adjustment module 602 is the second brightness adjustment module 204.

[0111] In one example, the control board is, for example, a control board in an air conditioner, the microcontroller 601 is, for example, an MCU, and the structure and function of the third brightness adjustment module are the same as those of the second brightness adjustment module 204 shown in the above embodiment. Figure 7 or Figure 8or Fig. 9 The second brightness adjustment module 204 is shown.

[0112] That is to say, the third brightness adjustment module 602 in this embodiment is to Figure 7 or Figure 8 or Fig. 9 The second brightness adjustment module 204 shown is arranged outside the display component, so that the parameters of the third brightness adjustment module can be adjusted conveniently, and the control panel can be adjusted flexibly.

[0113] Fig.15 Another schematic diagram of the control panel provided in this embodiment is shown as follows: Fig.15 As shown, the control board includes a microcontroller 601 and Fig.13 The second display component 502 and the microcontroller 601 are connected to the data port 104, the clock port 103 and at least one bit selection port of the display circuit (not shown in the figure).

[0114] That is to say, in this embodiment, the display component in the control panel is integrated and encapsulated with the second brightness adjustment module 204, so that the application scenario of the control panel can be improved.

[0115] The specific structure of the display circuit in the control panel refers to the above embodiments. Since the control panel adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0116] This embodiment provides an electronic device, including the control board of the above embodiment, such as Fig.14 Or the control board shown in 15, the electronic device can be suitable for various electrical devices using display circuits, such as air conditioners, mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles, ships and spacecraft. The electronic device is provided with a control board, a display component is installed on the control board, and a display circuit is provided in the display component.

[0117] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display circuit, characterized in that: include: A display control circuit, at least one display unit, a data port, a clock port, a power supply port and at least one bit selection port integrated on the same circuit board; The data port, the clock port, the power supply port, and the at least one bit selection port are respectively connected to the display control circuit; the power supply port is connected to a power supply, the data port is used to input serial data to the display control circuit; the clock port is used to provide a clock signal for the display control circuit; The output end of the display control circuit is connected to each display unit respectively, and the display units and the bit selection ports are connected one by one. The bit selection ports are used to input bit selection signals to select a target display unit so that the target display unit displays.

2. The display circuit according to claim 1, characterized in that: The display control circuit includes a serial-in parallel-out control circuit and at least one bit selection control module; The serial-in parallel-out control circuit is respectively connected to the data port, the clock port, the power supply port and the output end through different nodes; The number of the bit selection control modules, the bit selection ports and the display units is the same, the first end of each bit selection control module is connected to each bit selection port one-to-one, the second end of each bit selection control module is connected to each display unit one-to-one, and the third end of each bit selection control module is connected to the power supply port.

3. The display circuit according to claim 2, characterized in that: A first filtering module is arranged between the serial-in-parallel-output control circuit and the data port, a second filtering module is arranged between the serial-in-parallel-output control circuit and the clock port, and a first brightness adjustment module is arranged on the connection line between the output end of the serial-in-parallel-output control circuit and each display unit.

4. The display circuit according to claim 2, characterized in that: The bit selection control module includes a gating element; For each of the bit selection control modules, the first end of the gating element is connected to the power supply port, the second end of the gating element is connected to the bit selection port corresponding to the bit selection control module, and the third end of the gating element is connected to the display unit corresponding to the bit selection port; A first resistor is further arranged between the second end of the gating element and the connected bit selection port, and a second resistor is further arranged between the first resistor and the first end of the gating element.

5. The display circuit according to claim 4, characterized in that: The power supply port includes a positive power supply port; The display unit includes a plurality of light emitting diodes, anodes of the plurality of light emitting diodes are connected to the third end of the selection element, cathodes of the plurality of light emitting diodes are connected to the output end of the serial input and parallel output control circuit; the first end of the selection element is connected to the positive power supply port.

6. The display circuit according to claim 4, characterized in that: The power supply port includes a grounding port; The display unit includes a plurality of light emitting diodes, the cathodes of the plurality of light emitting diodes are all connected to the third end of the selection element, the anodes of the plurality of light emitting diodes are all connected to the output end of the serial input and parallel output control circuit; the first end of the selection element is connected to the ground port.

7. The display circuit according to any one of claims 1 to 6, characterized in that: The power supply port is also connected to a second brightness adjustment module, an input end of the second brightness adjustment module is connected to a power supply, and an output end of the second brightness adjustment module is connected to the power supply port.

8. The display circuit according to claim 7, characterized in that: The second brightness adjustment module includes any one of the following components: Adjust the resistance; Zener diode; Linear regulators; Constant current output chip.

9. The display circuit according to claim 7, characterized in that: The power supply includes multiple power supplies with different voltage ranges, the second brightness adjustment module includes multiple sub-adjustment units, the input end of each sub-adjustment unit is respectively connected to a different power supply, and the output end of each sub-adjustment unit is connected to each selection control module in the display control circuit.

10. The display circuit according to claim 7, characterized in that: The second brightness adjustment module includes multiple, and the second brightness adjustment modules correspond one-to-one to the bit selection control modules in the display control circuit. The input ends of each sub-adjustment unit in each second brightness adjustment module are respectively connected to different power supplies, and each power supply has a different voltage range. The output ends of each sub-adjustment unit in each second brightness adjustment module are respectively connected to the corresponding bit selection control module.

11. The display circuit according to any one of claims 1 to 6, characterized in that: The display control circuit is integrated in a first chip, which is disposed on the circuit board and is electrically connected to the display unit, a data port, a clock port and at least one bit selection port.

12. The display circuit according to claim 7, characterized in that: The second brightness adjustment module is integrated in a second chip, and the second chip is disposed on the circuit board and electrically connected to the power supply port.

13. A display component, characterized in that: The invention comprises a housing and the display circuit according to any one of claims 1 to 6 and 11, wherein the display circuit is arranged in the housing.

14. A display component, characterized in that: It comprises a housing and the display circuit according to any one of claims 1 to 12, wherein the display circuit is arranged in the housing.

15. A control panel, characterized in that: The control board includes a microcontroller and the display assembly of claim 13, wherein the microcontroller is connected to a data port, a clock port and at least one bit selection port of the display circuit; The control panel further comprises a third brightness adjustment module, the input end of the third brightness adjustment module is connected to the power supply, and the output end of the third brightness adjustment module is connected to the display component; The third brightness adjustment module is the second brightness adjustment module according to any one of claims 7 to 10.

16. A control panel, characterized in that: The control board comprises a microcontroller and the display assembly of claim 14, wherein the microcontroller is connected to a data port, a clock port and at least one bit selection port of the display circuit.

17. An electronic device, characterized in that: Comprising the control panel as claimed in claim 15 or 16.

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