Display drive protection circuit, display device and air conditioner

Abstract

The utility model provides a kind of display drive protection circuit, display device and air conditioner, display drive protection circuit is equipped with basic power supply interface, function power supply interface and drive interface, drive interface includes first drive interface and second drive interface;Basic display lamp group includes first light emitting diode, second light emitting diode;Function display lamp group includes first function lamp mounting position, second function lamp mounting position;Among them, one of first function lamp mounting position and second function lamp mounting position is provided with freewheeling diode, and the other function lamp mounting position is provided with light emitting diode.The utility model solves the problem of how to avoid the burning of other LEDs due to reverse voltage in the LED drive circuit after canceling the function position LED without adjusting the software.

Description

Technical Field

[0001] This utility model relates to the field of driving circuit technology, and more specifically, to a display driving protection circuit, a display device, and an air conditioner. Background Technology

[0002] In LED display circuit design, especially when using common anode or common cathode matrix structures, some LEDs are often removed due to customer requirements. If LEDs are removed directly, traditional designs require simultaneous modifications to the software logic to disable the lighting operation of that function bit; otherwise, the unremoved LEDs will be subjected to voltages exceeding their rated values ​​for extended periods, leading to LED burnout and display malfunctions. Utility Model Content

[0003] The problem solved by this invention is how to prevent other LEDs from being burned out due to reverse voltage after the function bit LED is canceled and the software is not adjusted in the LED driver circuit.

[0004] To address the aforementioned problems, this utility model provides a display driver protection circuit. The display driver protection circuit includes a basic power supply interface, a functional power supply interface, and a driver interface. The driver interface includes a first driver interface and a second driver interface. The basic display lamp group includes a first light-emitting diode (LED) and a second LED. The anodes of the first and second LEDs are connected to the basic power supply interface, the cathode of the first LED is connected to the first driver interface, and the cathode of the second LED is connected to the second driver interface. The functional display lamp group includes a first functional lamp mounting position and a second functional lamp mounting position. The positive terminals of the first and second functional lamp mounting positions are connected to the functional power supply interface, the negative terminal of the first functional lamp mounting position is connected to the first driver interface, and the negative terminal of the second functional lamp mounting position is connected to the second driver interface. One of the first and second functional lamp mounting positions is equipped with a freewheeling diode, and the other functional lamp mounting position is equipped with an LED.

[0005] The technical effects achieved by adopting this solution are as follows: Compared with existing technologies, in this solution, when a functional light mounting position does not have an LED installed, while the LEDs in other functional light mounting positions are working normally, a freewheeling diode is installed in the unused functional light mounting position to provide a current path for the drive circuit. This prevents the LEDs of the basic display light group from being subjected to reverse voltage surges during drive signal switching, thus effectively avoiding LED burnout. This design allows for flexible adjustment of LED configuration without modifying the driver software logic, making it suitable for design scenarios where multiple models share a PCB, improving circuit versatility and production flexibility. Only low-cost freewheeling diodes need to be installed in the unused LED locations, without changing PCB wiring or driver programs, reducing costs and facilitating mass production and subsequent maintenance.

[0006] Furthermore, the basic display light group also includes a third, fourth, fifth, sixth, and seventh light-emitting diode (LED); the driving interfaces also include a third, fourth, fifth, sixth, and seventh driving interface; the anode of the third LED is connected to the basic power supply interface, and the cathode of the third LED is connected to the third driving interface; the anode of the fourth LED is connected to the basic power supply interface, and the cathode of the fourth LED is connected to the fourth driving interface; the anode of the fifth LED is connected to the basic power supply interface, and the cathode of the fifth LED is connected to the fifth driving interface; the anode of the sixth LED is connected to the basic power supply interface, and the cathode of the sixth LED is connected to the sixth driving interface; the anode of the seventh LED is connected to the basic power supply interface, and the cathode of the seventh LED is connected to the seventh driving interface; wherein, the first, second, third, fourth, fifth, sixth, and seventh LEDs together constitute an "8"-shaped display module.

[0007] The technical effects achieved by adopting this solution are as follows: By using the first to seventh LEDs to form an "8"-shaped display module (i.e., a seven-segment display structure), the system can fully display the numbers 0-9 and some letters, meeting the application needs of instruments and displays for intuitive presentation of numerical information, and improving the completeness and practicality of the display function. The anode of each LED constituting the "8"-shaped display module is connected to the basic power supply interface, achieving a common anode structure. The on / off state is independently controlled only through the driving interface corresponding to the cathode of each LED. This structure facilitates the integrated design of the drive circuit, reduces power wiring complexity, and improves PCB layout efficiency.

[0008] Furthermore, the functional indicator light group also includes a third functional light mounting position, the positive terminal of which is connected to the functional power supply interface, and the negative terminal of which is connected to the third drive interface; wherein, the third functional light mounting position is equipped with a freewheeling diode or a light-emitting diode.

[0009] The technical benefits achieved by adopting this solution are as follows: By adding a third functional LED mounting position and connecting its positive terminal to the functional power supply interface and its negative terminal to the third drive interface, the drive interface resources are fully utilized, supporting flexible configuration of more custom functional indicator lights and enhancing the system's scalability and application adaptability. The same PCB design allows for the selection of LEDs (for enabling functions) or freewheeling diodes (for disabling functions while maintaining circuit safety) in the third functional LED mounting position according to different customer needs, achieving "one board for multiple uses" and reducing development and inventory costs. Furthermore, there is no need to redesign the circuit board for future product upgrades or function changes.

[0010] Furthermore, the functional indicator light group also includes a fourth functional light mounting position, the positive terminal of which is connected to the functional power supply interface, and the negative terminal of which is connected to the fourth drive interface; wherein, the fourth functional light mounting position is equipped with a freewheeling diode or a light-emitting diode.

[0011] The technical benefits of adopting this solution are as follows: By adding a fourth functional LED mounting position and connecting its positive terminal to the functional power supply interface and its negative terminal to the fourth drive interface, the drive interface resources are fully utilized, supporting flexible configuration of more custom functional indicator lights and enhancing the system's scalability and application adaptability. The same PCB design allows for the selection of LEDs (for enabling the function) or freewheeling diodes (for disabling the function while maintaining circuit safety) in the fourth functional LED mounting position according to different customer needs, achieving "one board for multiple uses" and reducing development and inventory costs. Furthermore, there is no need to redesign the circuit board for future product upgrades or function changes.

[0012] Furthermore, the functional indicator light group also includes a fifth functional light mounting position, the positive terminal of which is connected to the functional power supply interface, and the negative terminal of which is connected to the fifth drive interface; wherein, the fifth functional light mounting position is equipped with a freewheeling diode or a light-emitting diode.

[0013] The technical benefits achieved by adopting this solution are as follows: By adding a fifth functional LED mounting position and connecting its positive terminal to the functional power supply interface and its negative terminal to the fifth drive interface, the drive interface resources are fully utilized, supporting flexible configuration of more custom functional indicator lights and enhancing the system's scalability and application adaptability. The same PCB design allows for the selection of LEDs (for enabling the function) or freewheeling diodes (for disabling the function while maintaining circuit safety) in the fifth functional LED mounting position according to different customer needs, achieving "one board for multiple uses" and reducing development and inventory costs. Furthermore, there is no need to redesign the circuit board for future product upgrades or function changes.

[0014] Furthermore, the functional indicator light group also includes a sixth functional light mounting position; the positive terminal of the sixth functional light mounting position is connected to the functional power supply interface, and the negative terminal of the sixth functional light mounting position is connected to the sixth drive interface; wherein, the sixth functional light mounting position is equipped with a freewheeling diode or a light-emitting diode.

[0015] The technical benefits achieved by adopting this solution are as follows: By adding a sixth functional LED mounting position and connecting its positive terminal to the functional power supply interface and its negative terminal to the sixth drive interface, the drive interface resources are fully utilized, supporting flexible configuration of more custom functional indicator lights and enhancing the system's scalability and application adaptability. The same PCB design allows for the selection of LEDs (for enabling functions) or freewheeling diodes (for disabling functions while maintaining circuit safety) in the sixth functional LED mounting position according to different customer needs, achieving "one board for multiple uses" and reducing development and inventory costs. Furthermore, there is no need to redesign the circuit board for future product upgrades or function changes.

[0016] Furthermore, the function indicator light group also includes a seventh function light mounting position; the positive terminal of the seventh function light mounting position is connected to the function power supply interface, and the negative terminal of the seventh function light mounting position is connected to the seventh drive interface; wherein, the seventh function light mounting position is equipped with a freewheeling diode or a light-emitting diode.

[0017] The technical benefits achieved by adopting this solution are as follows: By adding a seventh function light mounting position and connecting its positive terminal to the function power supply interface and its negative terminal to the seventh drive interface, the drive interface resources are fully utilized, supporting flexible configuration of more custom function indicator lights and enhancing the system's scalability and application adaptability. The same PCB design allows for the selection of LEDs (function enable indicator) or freewheeling diodes (function disable but circuit safety) in the seventh function light mounting position according to different customer needs, achieving "one board for multiple uses" and reducing development and inventory costs. Furthermore, there is no need to redesign the circuit board for future product upgrades or function changes.

[0018] Furthermore, the basic display light group includes two figure-eight display modules.

[0019] The technical effects achieved by adopting this solution are as follows: By setting up two figure-eight display modules (i.e., two seven-segment LED displays), two-digit numbers can be displayed in combination, significantly enhancing the system's numerical expression capability. This is suitable for scenarios requiring the display of two-digit information such as temperature, time, counts, and status codes, meeting more complex display needs. The two figure-eight display modules use the same circuit structure, the same driving method, and the same interface layout, achieving modular design. This design facilitates circuit replication and PCB routing standardization, reduces design complexity, and improves production yield and assembly efficiency.

[0020] To solve the above problems, this utility model provides a display device, including the display driving protection circuit provided by any of the above technical solutions, wherein the display driving protection circuit displays data information through an "8" display module.

[0021] The technical effects achieved by adopting this technical solution are as follows: The display device integrates the aforementioned display driver protection circuit with protection function, accurately displays data information through the display module, and ensures the long-term stable operation of the entire display system.

[0022] To solve the above problems, this utility model provides an air conditioner that includes the display driver protection circuit provided by any of the above technical solutions.

[0023] The technical effects achieved by adopting this technical solution are as follows: During long-term operation, air conditioners often need to adjust the LED indicator function according to the differences in model configuration. By integrating the display driver protection circuit, when the LED on the installation position of a certain function light is canceled, it is not necessary to rely on the software to disable the channel synchronously. The hardware automatically provides the current path through the freewheeling diode, which effectively prevents the LED of the basic display light group from burning out due to reverse voltage, and significantly improves the stability and safety of the entire electrical system.

[0024] In summary, the above-mentioned technical solutions of this application can have one or more of the following advantages or beneficial effects: i) By setting a freewheeling diode in the mounting position of the functional lamp without LEDs, a current path is provided for the drive circuit, effectively preventing the LEDs of the basic display lamp group from being damaged by reverse voltage, thus improving the long-term reliability and safety of the circuit. ii) There is no need to modify the driver or disable the corresponding control logic due to the removal of the LED functional position. The hardware itself has fault tolerance and protection capabilities, avoiding hardware failures caused by asynchronous software updates, and significantly reducing the complexity of product development, testing, and maintenance. iii) The same display driver circuit board can be flexibly configured (by installing LEDs or freewheeling diodes) to adapt to air conditioners or other terminal products with different functional configurations, reducing the number of PCB versions and lowering development costs, inventory pressure, and production management difficulty. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the original circuit of a display driver protection circuit in an embodiment of this utility model; Figure 2 This is a schematic diagram of the basic circuit of the display driver protection circuit in the embodiments of this utility model; Figure 3 This is a schematic diagram of the panel showing the display drive protection circuit in an embodiment of this utility model; Figure 4 This is a schematic diagram of the reverse voltage circuit of the display drive protection circuit in an embodiment of this utility model; Figure 5 The circuit principle of the display driver protection circuit in this embodiment of the utility model is as follows. Figure 1 ; Figure 6 The circuit principle of the display driver protection circuit in this embodiment of the utility model is as follows. Figure 2 ; Figure 7 This is a simplified diagram of the drive circuit for the display drive protection circuit in an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1-Display driver protection circuit; 11-Basic power supply interface; 111-High-level interface; 112-Low-level interface; 12-Functional power supply interface; 13-Drive interface; 131-First drive interface; 132-Second drive interface; 133-Third drive interface; 134-Fourth drive interface; 135-Fifth drive interface; 136-Sixth drive interface; 137-Seventh drive interface; 14-Basic display lamp group; 141-First light-emitting diode; 142-Second light-emitting diode; 143-Third... Light-emitting diode (LED); 144-Fourth LED; 145-Fifth LED; 146-Sixth LED; 147-Seventh LED; 15-Functional indicator light group; 151-First functional light mounting position; 152-Second functional light mounting position; 153-Third functional light mounting position; 154-Fourth functional light mounting position; 155-Fifth functional light mounting position; 156-Sixth functional light mounting position; 157-Seventh functional light mounting position; 16-Freewheeling diode; 17-LED. Detailed Implementation

[0027] The purpose of this invention is to provide a display driver protection circuit, which can replace the canceled functional diodes in the LED driver circuit with freewheeling diodes to form a low-impedance discharge circuit, effectively avoiding circuit reverse voltage and preventing damage to other functional diodes.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] See Figures 1-7This utility model provides a display driver protection circuit 1. The display driver protection circuit 1 is provided with a basic power supply interface 11, a functional power supply interface 12, and a driver interface 13. The driver interface 13 includes a first driver interface 131 and a second driver interface 132. The basic display lamp group 14 includes a first light-emitting diode 141 and a second light-emitting diode 142. The anodes of the first light-emitting diode 141 and the second light-emitting diode 142 are connected to the basic power supply interface 11. The cathodes of the first light-emitting diode 141 are connected to the first driver interface 131, and the cathodes of the second light-emitting diode 142 are connected to the second driver interface 132. The function indicator light group 15 includes a first function light mounting position 151 and a second function light mounting position 152. The positive terminals of the first function light mounting position 151 and the second function light mounting position 152 are connected to the function power supply interface 12. The negative terminal of the first function light mounting position 151 is connected to the first drive interface 131, and the negative terminal of the second function light mounting position 152 is connected to the second drive interface 132. At least one of the first function light mounting position 151 and the second function light mounting position 152 is provided with a freewheeling diode 16, and the other function light mounting position is provided with a light-emitting diode 17.

[0030] The first light-emitting diode 141 and the second light-emitting diode 142 are the same as the light-emitting diode 17 installed in the function indicator lamp group 15.

[0031] Specifically, the basic power supply interface 11 provides a 12V common anode power supply, and the functional power supply interface 12 provides a 12V functional bit power supply (FUN). The drive interfaces include a first drive interface 131 (SEG-A) and a second drive interface 132 (SEG-B). Both the first drive interface 131 and the second drive interface 132 are connected to the cathode drive circuit of the microcontroller unit (MCU), and their outputs are active low. The basic indicator light group 14 includes a first light-emitting diode 141 and a second light-emitting diode 142. The anodes of both are connected to the basic power supply interface 11. The cathode of the first light-emitting diode 141 is connected to the first drive interface 131, and the cathode of the second light-emitting diode 142 is connected to the second drive interface 132. The function indicator light group 15 includes a first function light mounting position 151 and a second function light mounting position 152. The positive terminal of the first function light mounting position 151 is connected to the function power supply interface 12, and the negative terminal of the first function light mounting position 151 is connected to the first drive interface 131. Similarly, the positive terminal of the second function light mounting position 152 is connected to the function power supply interface 12, and the negative terminal of the second function light mounting position 152 is connected to the second drive interface 132. In the seven function light mounting positions, when a function needs to be canceled, a freewheeling diode 16 is installed on the corresponding function light mounting position to form a circuit path, preventing the generation of a reverse voltage loop.

[0032] For example, see Figure 4 and Figure 5When the second functional lamp mounting position 152 is not equipped with the UVC display function, the second functional lamp mounting position 152 is equipped with a freewheeling diode 16 (D2). The microcontroller outputs a low-level scan through the first drive interface 131 and the second drive interface 132. The LED-POWER is lit normally. D2 is turned on due to the characteristics of the freewheeling diode 16, forming a circuit path without reverse voltage.

[0033] See Figure 4 If the entire device lacks UVC functionality, and only the LED-UVC is removed from the hardware without any software modifications, then during each scan to the function bit from a high anode level, SEG-B will be at a low level (because the software still illuminates the LED-UVC, only the hardware is not installed and therefore not displayed). This creates a voltage loop: FUN—LED-POWER anode—LED-POWER cathode—LED-A2 cathode—LED-A2 anode—LED-B2 anode—LED-B2 cathode—SEG-B. Clearly, LED-A2 experiences reverse voltage, with a voltage difference of approximately 6V (assuming a forward voltage drop of 3V for the LED and no other voltage dividers). In each scan cycle, LED-A2 will break down in reverse once, while the reverse voltage of a light-emitting diode is typically 5V. Over time, this could lead to reverse breakdown of LED-A2.

[0034] Preferably, the freewheeling diode 16 is model 4007.

[0035] Preferably, the freewheeling diode 16 is model 4148.

[0036] Preferably, the microcontroller unit (MCU) is the core control component in the circuit. The MCU controls the LED lighting by controlling the cathode drive circuit (2003 driver) and the anode drive circuit (transistor driver). Specifically, when the software uses the anode scanning method, the MCU controls the anodes to output high levels sequentially, while simultaneously providing a low level to the corresponding LED's cathode through the cathode drive circuit (the drive interface connected to the MCU), thus forming a conductive loop and lighting the LED.

[0037] See Figure 2 and Figure 3The basic display lamp group 14 also includes a third light-emitting diode 143, a fourth light-emitting diode 144, a fifth light-emitting diode 145, a sixth light-emitting diode 146, and a seventh light-emitting diode 147; the driving interface 13 also includes a third driving interface 133, a fourth driving interface 134, a fifth driving interface 135, a sixth driving interface 136, and a seventh driving interface 137; the anode of the third light-emitting diode 143 is connected to the basic power supply interface 11, and the cathode of the third light-emitting diode 143 is connected to the third driving interface 133; the anode of the fourth light-emitting diode 144 is connected to the basic power supply interface 11, and the cathode of the fourth light-emitting diode 144 is connected to the fourth driving interface 134; the fifth light-emitting diode... The anode of LED 145 is connected to the base power supply interface 11, and the cathode of the fifth LED 145 is connected to the fifth drive interface 135; the anode of the sixth LED 146 is connected to the base power supply interface 11, and the cathode of the sixth LED 146 is connected to the sixth drive interface 136; the anode of the seventh LED 147 is connected to the base power supply interface 11, and the cathode of the seventh LED 147 is connected to the seventh drive interface 137; wherein, the first LED 141, the second LED 142, the third LED 143, the fourth LED 144, the fifth LED 145, the sixth LED 146, and the seventh LED 147 together constitute the figure-eight display module.

[0038] Specifically, the basic display light group 14 also includes a third light-emitting diode 143, a fourth light-emitting diode 144, a fifth light-emitting diode 145, a sixth light-emitting diode 146, and a seventh light-emitting diode 147. The driving interfaces also include a third driving interface 133 (SEG-C), a fourth driving interface 134 (SEG-D), a fifth driving interface 135 (SEG-E), a sixth driving interface 136 (SEG-F), and a seventh driving interface 137 (SEG-G). The first light-emitting diode 141, the second light-emitting diode 142, the third light-emitting diode 143, the fourth light-emitting diode 144, the fifth light-emitting diode 145, the sixth light-emitting diode 146, and the seventh light-emitting diode 147 together constitute an "8" display module, which can display the numbers "0-9".

[0039] See Figure 2 The functional indicator light group 15 also includes a third functional light mounting position 153, the positive end of the third functional light mounting position 153 is connected to the functional power supply interface 12, and the negative end of the third functional light mounting position 153 is connected to the third drive interface 133; wherein, the third functional light mounting position 153 is provided with a freewheeling diode 16 or a light-emitting diode 17.

[0040] Specifically, the positive terminal of the third function light mounting position 153 is connected to the function power supply interface 12, and the negative terminal is connected to the third drive interface 133. If the air conditioner retains the sleep function, a light-emitting diode is installed in the third function light mounting position 153 to form the third function light (LED-sleep); if the sleep function is canceled, a freewheeling diode 16 is installed to ensure that the LED corresponding to SEG-C in the basic display light group 14 has no reverse voltage.

[0041] See Figure 2 The functional indicator light group 15 also includes a fourth functional light mounting position 154, the positive end of the fourth functional light mounting position 154 is connected to the functional power supply interface 12, and the negative end of the fourth functional light mounting position 154 is connected to the fourth drive interface 134; wherein, the fourth functional light mounting position 154 is provided with a freewheeling diode 16 or a light-emitting diode 17.

[0042] Specifically, the positive terminal of the fourth function light mounting position 154 is connected to the function power supply interface 12, and the negative terminal is connected to the fourth drive interface 134. If the air conditioner retains the timer function, a light-emitting diode is installed in the fourth function light mounting position 154 to form the fourth function light (LED-timer); if the timer function is cancelled, a freewheeling diode 16 is installed to ensure that there is no reverse voltage for the LED corresponding to SEG-D in the basic display light group 14.

[0043] See Figure 2 The functional indicator light group 15 also includes a fifth functional light mounting position 155, the positive end of the fifth functional light mounting position 155 is connected to the functional power supply interface 12, and the negative end of the fifth functional light mounting position 155 is connected to the fifth drive interface 135; wherein, the fifth functional light mounting position 155 is provided with a freewheeling diode 16 or a light-emitting diode 17.

[0044] Specifically, the positive terminal of the fifth function light mounting position 155 is connected to the function power supply interface 12, and the negative terminal is connected to the fifth drive interface 135. If the air conditioner retains the swing function, a light-emitting diode is installed in the fifth function light mounting position 155 to form the fifth function light (LED-swing); if the swing function is cancelled, a freewheeling diode 16 is installed to ensure that the LED corresponding to SEG-E in the basic display light group 14 has no reverse voltage.

[0045] See Figure 2 The function indicator light group 15 also includes a sixth function light mounting position 156; the positive end of the sixth function light mounting position 156 is connected to the function power supply interface 12, and the negative end of the sixth function light mounting position 156 is connected to the sixth drive interface 136; wherein, the sixth function light mounting position 156 is provided with a freewheeling diode 16 or a light-emitting diode 17.

[0046] Specifically, the positive terminal of the sixth function light mounting position 156 is connected to the function power supply interface 12, and the negative terminal is connected to the sixth drive interface 136. If the air conditioner retains the energy-saving function, a light-emitting diode is installed in the sixth function light mounting position 156 to form the sixth function light (LED-energy saving); if the energy-saving function is cancelled, a freewheeling diode 16 is installed to ensure that the LED corresponding to SEG-F in the basic display light group 14 has no reverse voltage.

[0047] For example, see Figure 6 When the UVC and energy-saving functions are disabled, a freewheeling diode 16 is installed at the second function lamp mounting position 152, and a freewheeling diode 16 is installed at the sixth function lamp mounting position 156. The LEDs in the function indicator lamp group 15, excluding LED-UVC and LED-energy-saving, are lit normally. The freewheeling diodes 16 installed at the second and sixth function lamp mounting positions 152 and 156 form a circuit path without reverse voltage.

[0048] See Figure 2 The function indicator light group 15 also includes a seventh function light mounting position 157; the positive end of the seventh function light mounting position 157 is connected to the function power supply interface 12, and the negative end of the seventh function light mounting position 157 is connected to the seventh drive interface 137; wherein, the seventh function light mounting position 157 is provided with a freewheeling diode 16 or a light-emitting diode 17.

[0049] Specifically, the positive terminal of the seventh function light mounting position 157 is connected to the function power supply interface 12, and the negative terminal is connected to the seventh drive interface 137. If the air conditioner retains the WIFI function, an LED is installed in the seventh function light mounting position 157 to form the seventh function light (LED-WIFI); if the WIFI function is cancelled, a freewheeling diode 16 is installed to ensure that there is no reverse voltage on the LEDs corresponding to SEG-G in the basic display light group 14.

[0050] See Figure 3 The basic display light group 14 includes two figure-eight display modules.

[0051] Specifically, the basic power supply interface 11 includes a high-level interface 111 (COM-H) and a low-level interface 112 (COM-L); the first figure-eight display module is the high-level display, consisting of LED-A1 to LED-G1. The second figure-eight display module is the low-level display, consisting of LED-A2 to LED-G2. The two figure-eight modules work together to display values ​​from 00 to 99.

[0052] The anode of each LED in the first “8” display module is connected to the high-level interface 111 (COM-H); the anode of each LED in the second “8” display module is connected to the low-level interface 112 (COM-L).

[0053] Preferably, the two figure-eight modules work together to display the set temperature on the air conditioner.

[0054] This utility model provides a display device, including the display driving protection circuit 1 provided by any of the above technical solutions, wherein the display circuit displays data information through the display module.

[0055] This utility model provides an air conditioner, including the display driver protection circuit 1 provided by any of the above technical solutions.

[0056] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A display driver protection circuit, wherein the display driver protection circuit is provided with a basic power supply interface (11), a functional power supply interface (12), and a driver interface (13), characterized in that, The drive interface (13) includes a first drive interface (131) and a second drive interface (132). The basic display lamp group (14) includes a first light-emitting diode (141) and a second light-emitting diode (142). The anode of the first light-emitting diode (141) and the anode of the second light-emitting diode (142) are connected to the basic power supply interface (11). The cathode of the first light-emitting diode (141) is connected to the first driving interface (131), and the cathode of the second light-emitting diode (142) is connected to the second driving interface (132). The function indicator light group (15) includes a first function light mounting position (151) and a second function light mounting position (152). The positive terminals of the first function light mounting position (151) and the second function light mounting position (152) are connected to the function power supply interface (12). The negative terminal of the first function light mounting position (151) is connected to the first drive interface (131), and the negative terminal of the second function light mounting position (152) is connected to the second drive interface (132). Among them, one of the first functional lamp mounting positions (151) and the second functional lamp mounting position (152) is equipped with a freewheeling diode (16), and the other functional lamp mounting position is equipped with a light-emitting diode (17).

2. The display driver protection circuit according to claim 1, characterized in that, The basic display lamp group (14) also includes a third light-emitting diode (143), a fourth light-emitting diode (144), a fifth light-emitting diode (145), a sixth light-emitting diode (146), and a seventh light-emitting diode (147). The drive interface (13) also includes a third drive interface (133), a fourth drive interface (134), a fifth drive interface (135), a sixth drive interface (136), and a seventh drive interface (137). The anode of the third light-emitting diode (143) is connected to the basic power supply interface (11), and the cathode of the third light-emitting diode (143) is connected to the third drive interface (133). The anode of the fourth light-emitting diode (144) is connected to the basic power supply interface (11), and the cathode of the fourth light-emitting diode (144) is connected to the fourth drive interface (134). The anode of the fifth light-emitting diode (145) is connected to the basic power supply interface (11), and the cathode of the fifth light-emitting diode (145) is connected to the fifth drive interface (135). The anode of the sixth light-emitting diode (146) is connected to the basic power supply interface (11), and the cathode of the sixth light-emitting diode (146) is connected to the sixth driving interface (136). The anode of the seventh light-emitting diode (147) is connected to the basic power supply interface (11), and the cathode of the seventh light-emitting diode (147) is connected to the seventh drive interface (137). The first light-emitting diode (141), the second light-emitting diode (142), the third light-emitting diode (143), the fourth light-emitting diode (144), the fifth light-emitting diode (145), the sixth light-emitting diode (146), and the seventh light-emitting diode (147) together constitute the "8" display module.

3. The display driver protection circuit according to claim 2, characterized in that, The functional indicator light group (15) also includes a third functional light mounting position (153). The positive terminal of the third functional lamp mounting position (153) is connected to the functional power supply interface (12), and the negative terminal of the third functional lamp mounting position (153) is connected to the third drive interface (133). The third functional lamp mounting position (153) is provided with the freewheeling diode (16) or the light-emitting diode (17).

4. The display driver protection circuit according to claim 2, characterized in that, The functional indicator light group (15) also includes a fourth functional light mounting position (154). The positive terminal of the fourth functional lamp mounting position (154) is connected to the functional power supply interface (12), and the negative terminal of the fourth functional lamp mounting position (154) is connected to the fourth drive interface (134). The fourth functional lamp mounting position (154) is provided with the freewheeling diode (16) or the light-emitting diode (17).

5. The display driver protection circuit according to claim 2, characterized in that, The functional indicator light group (15) also includes a fifth functional light mounting position (155). The positive terminal of the fifth functional lamp mounting position (155) is connected to the functional power supply interface (12), and the negative terminal of the fifth functional lamp mounting position (155) is connected to the fifth drive interface (135). The fifth functional lamp mounting position (155) is provided with the freewheeling diode (16) or the light-emitting diode (17).

6. The display driver protection circuit according to claim 2, characterized in that, The functional display light group (15) also includes a sixth functional light mounting position (156); The positive terminal of the sixth functional lamp mounting position (156) is connected to the functional power supply interface (12), and the negative terminal of the sixth functional lamp mounting position (156) is connected to the sixth drive interface (136). The sixth functional lamp mounting position (156) is provided with the freewheeling diode (16) or the light-emitting diode (17).

7. The display driver protection circuit according to claim 2, characterized in that, The functional display light group (15) also includes a seventh functional light mounting position (157); The positive terminal of the seventh function lamp mounting position (157) is connected to the function power supply interface (12), and the negative terminal of the seventh function lamp mounting position (157) is connected to the seventh drive interface (137). The seventh functional lamp mounting position (157) is provided with the freewheeling diode (16) or the light-emitting diode (17).

8. The display driver protection circuit according to claim 2, characterized in that, The basic display light group (14) includes two figure-eight display modules.

9. A display device, characterized in that, Includes a display driver protection circuit as described in any one of claims 2 to 8, wherein the display driver protection circuit displays data information through the "8" display module.

10. An air conditioner, characterized in that, Includes the display driver protection circuit as described in any one of claims 1 to 8.

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