Light panel control interface, control board, light panel, display driving circuit and display device

Abstract

This application relates to a lamp board control interface, a control board, a lamp board, a display driver circuit, and a display device. The lamp board control interface is used to connect the control board and the lamp board. The lamp board control interface includes multiple pin modules; each pin module includes multiple pins; the multiple pin modules include at least a power pin module; a ground pin is provided between adjacent pin modules; the number of ground pins between the power pin module and other pin modules is greater than the number of ground pins between other pin modules. This application can effectively reduce electromagnetic interference and improve the stability and reliability of the interface circuit.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to lamp board control interfaces, control boards, lamp boards, display driver circuits, and display devices. Background Technology

[0002] With the development of the display industry, the demand for high-pixel, high-brightness, and multi-functional displays is increasing. As important components of the display cabinet, the display control board and LED light board are connected via an interface. Currently, the pin arrangement and placement of this interface suffer from inconsistencies and unreasonableness. Because each manufacturer has its own interface definition scheme, inconsistencies between the display control board and LED light board can lead to poor compatibility, hindering industry development. Furthermore, unreasonable pin arrangement and placement can cause interference between pin signals, resulting in display flickering, screen distortion, and other problems. Summary of the Invention

[0003] To address the aforementioned technical issues, this application provides a lamp board control interface, a control board, a lamp board, a display driver circuit, and a display device.

[0004] In a first aspect, embodiments of this application provide a lamp board control interface for connecting a control board and a lamp board, the lamp board control interface including multiple pin modules;

[0005] Each of the pin modules includes a plurality of pins; the plurality of pin modules includes at least a power pin module;

[0006] A grounding pin is provided between adjacent pin modules; the number of grounding pins between the power pin module and other pin modules is greater than the number of grounding pins between other pin modules.

[0007] In one embodiment of this application, the plurality of pin modules further include a control signal pin module, the control signal pin module including a data clock output pin and a grayscale clock signal pin;

[0008] Along the pin arrangement direction, grounding pins are provided on both sides of the data clock output pin and / or the grayscale clock signal pin.

[0009] In one embodiment of this application, the plurality of pin modules further include a control signal pin module, the control signal pin module including a data clock output pin and a grayscale clock signal pin; the data clock output pin and the grayscale clock signal pin are located on different sides of the pin arrangement direction.

[0010] In one embodiment of this application, the plurality of pin modules further include a display data signal pin module, the display data signal pin module comprising M groups of display data signal pins; each display data signal pin group comprising N different display color data signal pins; M and N are both positive integers greater than 1.

[0011] In one embodiment of this application, a grounding pin is provided between each X group of display data signal pins; wherein X is a positive integer greater than or equal to 1, and X is less than M.

[0012] In one embodiment of this application, the power pin module includes Y power pin groups, where Y is a positive integer greater than or equal to 2.

[0013] In one embodiment of this application, the power pin module includes a first power pin group and a second power pin group;

[0014] The first power pin group is used to provide a first driving power voltage to the green and blue light-emitting elements of the lamp panel; the second power pin group is used to provide a second driving power voltage to the red light-emitting element of the lamp panel.

[0015] The voltage of the first driving power supply is different from that of the second driving power supply.

[0016] In one embodiment of this application, the plurality of pin modules further includes a power supply compensation pin module, which is used to provide a first driving power supply voltage for the green light-emitting element and the blue light-emitting element of the lamp board; the number of power supply pins in the first power supply pin group is the same as the number of power supply pins in the second power supply pin group, and is greater than the number of pins in the power supply compensation pin module.

[0017] In one embodiment of this application, each of the power supply pin groups corresponds one-to-one with each color light-emitting element; different power supply pin groups provide different power supply voltages.

[0018] In one embodiment of this application, the plurality of pin modules further includes a serial data communication pin module, which includes a serial interface enable signal pin, a storage data output pin, a serial clock signal pin, and a storage data input pin.

[0019] Secondly, embodiments of this application also provide a control board, including the lamp control interface as described in the first aspect.

[0020] Thirdly, embodiments of this application also provide a light panel, including the light panel control interface as described in the first aspect.

[0021] Fourthly, embodiments of this application also provide a display driving circuit, including the control board as described in the second aspect and the lamp board as described in the third aspect.

[0022] Fifthly, embodiments of this application also provide a display device, including the display driving circuit as described in the fourth aspect.

[0023] The technical solution provided in this application has the following advantages compared with the prior art:

[0024] The lamp board control interface provided in this application embodiment is used to connect a control board and a lamp board. The lamp board control interface includes multiple pin modules; each pin module includes multiple pins; the multiple pin modules include at least a power pin module; ground pins are provided between adjacent pin modules; the number of ground pins between the power pin module and other pin modules is greater than the number of ground pins between other pin modules. This application modularizes the lamp board control interface, i.e., sets it as multiple pin modules, and distributes the module architecture, which is beneficial for the standardization of input / output interface definitions and improves the convenience of connection. This application provides ground pins between adjacent pin modules, and sets the number of ground pins between the power pin module and other pin modules to be greater than the number of ground pins between other pin modules. That is, this application provides ground pins between each pin module for signal isolation, and also sets different density settings for ground pins at different locations, setting more ground pins near the power pin module and fewer ground pins between other pin modules, which can effectively reduce electromagnetic interference and improve the stability and reliability of the interface circuit. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a lamp board control interface provided in an embodiment of this application;

[0028] Figure 2 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0029] Figure 3 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0030] Figure 4 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0031] Figure 5 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0032] Figure 6 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0033] Figure 7 A schematic diagram of a common-anode power supply pin connection is provided for an embodiment of this application;

[0034] Figure 8 A schematic diagram of a common-cathode power supply pin connection is provided for an embodiment of this application;

[0035] Figure 9 This application provides another common-anode power supply pin connection diagram.

[0036] Figure 10 This application provides another common-cathode power supply pin connection diagram.

[0037] Figure 11 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0038] Figure 12 A schematic diagram of another lamp board control interface provided in this application embodiment;

[0039] Figure 13 A specific example diagram of a lamp board control interface provided in an embodiment of this application;

[0040] Figure 14 This is a schematic diagram of a display driving circuit provided in an embodiment of this application. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0043] This application discloses a light board control interface for connecting a control board and a light board. Both the control board and the light board can include the light board control interface, and they are connected via the light board control interface for data transmission. For example, the light board control interface on the control board can be a female connector, and the corresponding light board control interface on the light board can be a male connector; or, for example, the light board control interface on the control board can be a male connector, and the corresponding light board control interface on the light board can be a female connector.

[0044] Figure 1 This is a schematic diagram of the structure of a lamp board control interface provided in an embodiment of this application, as shown below. Figure 1 As shown, the lamp board control interface includes multiple pin modules. Figure 1 The example configuration includes six pin modules: pin module A1 (pins 1 to 8, pins 73 to 80), pin module A2 (pins 17 to 28, pins 31 to 42), pin module A3 (pins 45 to 50), pin module A4 (pins 53 and 54), pin module A5 (pins 57, 59, 61, and 63), and pin module A6 (pins 58 and 60). This application modularizes the lamp board control interface according to function, with each pin module including multiple pins.

[0045] To avoid interference between signals, embodiments of this application provide a grounding pin (GND) between adjacent pin modules, such as... Figure 1 As shown, a grounding pin GND (pins 9 to 16) is provided between pin module A1 and pin module A2; a grounding pin GND (pins 43 and 44) ​​is provided between pin module A2 and pin module A3; a grounding pin GND (pins 51 and 52) is provided between pin module A3 and pin module A4; a grounding pin GND (pin 55) is provided between pin module A4 and pin module A5; a grounding pin GND (pin 56) is provided between pin module A4 and pin module A6; a grounding pin GND (pins 65, 67, 69, and 71) is provided between pin module A5 and pin module A1; and a grounding pin GND (pins 62, 64, 66, 68, 70, and 72) is provided between pin module A6 and pin module A1.

[0046] The lamp board control interface of this application includes at least a power supply pin module A1. The number of ground pins between the power supply pin module A1 and other pin modules is greater than the number of ground pins between the other pin modules. For example... Figure 1As shown, the number of ground pins (GND) between power pin module A1 and pin module A2 is greater than the number of ground pins (GND) between pin module A2 and pin module A3. The number of ground pins (GND) between power pin module A1 and pin module A5 is greater than the number of ground pins (GND) between pin module A4 and pin module A5. The number of ground pins (GND) between power pin module A1 and pin module A6 is greater than the number of ground pins (GND) between pin module A2 and pin module A3. This application uses different density settings for ground pins at different locations. Because the pins in the power pin module carry a large current, they can easily cause electromagnetic interference to signals on nearby pins. Therefore, this application sets the number of ground pins between power pin module A1 and other pin modules to be greater than the number of ground pins between other pin modules, i.e.

[0047] By increasing the number of grounding pins near the power supply pin module and decreasing the number of grounding pins between other pin modules, electromagnetic interference can be effectively reduced and the stability and reliability of the interface circuit can be improved.

[0048] In some implementations, the multiple pin modules further include a control signal pin module, which includes a data clock output pin and a grayscale clock signal pin. Ground pins are provided on both sides of the data clock output pin and / or the grayscale clock signal pin along the pin arrangement direction.

[0049] Figure 2 A schematic diagram of another lamp board control interface provided in this application embodiment is shown below. Figure 2 As shown, pin module A4 is a control signal pin module, which includes the data clock output pin HDCLK (pin 53) and the grayscale clock signal pin HGCLK (pin 54). Along the pin arrangement direction ( Figure 2 (As indicated by the double arrows in the diagram), grounding pins GND are provided on both sides of the data clock output pin HDCLK and the grayscale clock signal pin HDCLK (pins 51 and 55 are the grounding pins on both sides of the data clock output pin HDCLK, and pins 52 and 56 are the grounding pins on both sides of the grayscale clock signal pin HDCLK). Since the data clock output pin HDCLK and the grayscale clock signal pin HDCLK are clock signals, the transitions of the clock signals can easily cause electromagnetic interference to the signals of surrounding pins. Therefore, in this embodiment, grounding pins GND are provided on both sides of the data clock output pin HDCLK and the grayscale clock signal pin HDCLK to prevent electromagnetic interference from the data clock output pin HDCLK and the grayscale clock signal pin HDCLK to the signals of adjacent pins and improve electromagnetic compatibility.

[0050] In some implementations, the multiple pin modules also include a control signal pin module, which includes a data clock output pin and a grayscale clock signal pin; the data clock output pin and the grayscale clock signal pin are located on different sides of the pin arrangement direction.

[0051] by Figure 2 Taking this example, in this embodiment of the application, the data clock output pin HDCLK and the grayscale clock signal pin HDCLK are located on different sides of the pin arrangement direction. Figure 1 The double arrows (pointing to the left and right) are used to provide higher isolation between the data clock output pin HDCLK and the grayscale clock signal pin HDCLK, improving signal anti-interference performance and stability. It should be noted that the order of the data clock output pin HDCLK and the grayscale clock signal pin HDCLK can be interchanged, for example... Figure 2 In this embodiment, the data clock output pin HDCLK is located on the left and the grayscale clock signal pin HDCLK is located on the right. In other embodiments, the data clock output pin HDCLK can also be located on the right and the grayscale clock signal pin HDCLK can be located on the left.

[0052] In some implementations, the multiple pin modules further include a display data signal pin module, which includes M groups of display data signal pins; each display data signal pin group includes N different display color data signal pins; M and N are both positive integers greater than 1.

[0053] The display data signal pin module is used to transmit display data from the LED panel to drive the LED panel to display images. Figure 3 A schematic diagram of another lamp board control interface provided in this application embodiment is shown below. Figure 3 As shown, the multiple pin modules of this application also include a display data signal pin module. Figure 3 An exemplary configuration of the display data signal pin module includes eight groups of display data signal pins, namely display data signal pin group A21, display data signal pin group A22, display data signal pin group A23, display data signal pin group A24, display data signal pin group A25, display data signal pin group A26, display data signal pin group A27, and display data signal pin group A28.

[0054] Figure 3An exemplary configuration includes three different display color data signal pin groups for each display data signal pin group. Display data signal pin group A21 includes a red data signal pin H_R1 (pin 17), a green data signal pin H_G1 (pin 19), and a blue data signal pin H_B1 (pin 21); display data signal pin group A22 includes a red data signal pin H_R2 (pin 18), a green data signal pin H_G2 (pin 20), and a blue data signal pin H_B2 (pin 22); display data signal pin group A23 includes a red data signal pin H_R3 (pin 23), a green data signal pin H_G3 (pin 25), and a blue data signal pin H_B3 (pin 27); display data signal pin group A24 includes a red data signal pin H_R4 (pin 24), a green data signal pin H_G4 (pin 26), and a blue data signal pin H_B4 (pin 28). Display data signal pin group A25 includes red data signal pin H_R5 (pin 31), green data signal pin H_G5 (pin 33), and blue data signal pin H_B5 (pin 35); display data signal pin group A26 includes red data signal pin H_R6 (pin 32), green data signal pin H_G6 (pin 34), and blue data signal pin H_B6 (pin 36); display data signal pin group A27 includes red data signal pin H_R7 (pin 37), green data signal pin H_G7 (pin 39), and blue data signal pin H_B7 (pin 41); display data signal pin group A28 includes red data signal pin H_R8 (pin 38), green data signal pin H_G8 (pin 40), and blue data signal pin H_B8 (pin 42).

[0055] It should be noted that the embodiments of this application do not limit the arrangement order of the data signal pins for different display colors, such as... Figure 3 The color data signal pins of the same display data signal pin group shown are located on the same side of the pin arrangement direction. In other embodiments, the arrangement of the color data signal pins can also be as follows: Figure 4 , Figure 5 , Figure 6 As shown. Taking a display data signal pin module that includes 8 sets of display data signal pin groups, each of which includes 3 different display color data signal pins as an example, the 24 pins of the 8 sets of display data signal pin groups are divided into two parts, which are located on both sides of the pin arrangement direction. The 12 pins in each part have 12! = 12 * 11 * 10 ... * 1 = 479001600 possible arrangements.

[0056] This application allows for setting the number of display data signal pin groups according to actual needs, in order to support high data pixel scenarios, such as large-size COB (Chip on Board) and high-resolution COB scenarios.

[0057] In some implementations, a ground pin is provided between each X group of display data signal pins. Here, X is a positive integer greater than or equal to 1, and X is less than M.

[0058] by Figure 3 For example, a ground pin (GND) is provided between every four groups of display data signal pins. To improve the output reliability of the display data signal, a ground pin can be provided between every X groups of display data signal pins. In other embodiments, the specific value of X can be selected according to the circuit's anti-interference requirements.

[0059] In some implementations, the power pin module includes Y power pin groups, where Y is a positive integer greater than or equal to 2.

[0060] Based on the power pin connection method, LED boards can be divided into common anode and common cathode interface definitions. In a common anode LED board, the positive terminals of all three color LEDs (red, green, and blue) are connected to the positive terminal of the power supply. In a common cathode LED board, the negative terminals of all three color LEDs (red, green, and blue) are connected to the negative terminal of the power supply, requiring different power supplies for the positive terminals of the three color LEDs.

[0061] The lamp board control interface provided in this application supports both common-cathode and common-anode lamp board drivers. The lamp board control interface provided in this application includes Y groups of power supply pins, where Y is a positive integer greater than or equal to 2. When driving a common-anode lamp board, each group of power supply pins can be connected to the same power signal. Figure 7 This is a schematic diagram of a common-anode power supply pin connection provided for an embodiment of this application. Figure 7 As shown, the lamp board control interface provided in this application embodiment includes two sets of power pin groups, namely power pin group A11 and power pin group A12. Power pin group A11 includes multiple power pins (pin 1 to pin 8), and power pin group A12 includes multiple power pins (pin 73 to pin 80). Both sets of power pin groups are connected to a 4.0V power supply voltage.

[0062] Figure 8 This is a schematic diagram of a common-cathode power supply pin connection provided for an embodiment of this application. Figure 8As shown, the lamp board control interface provided in this embodiment includes two sets of power pin groups, namely power pin group A11 and power pin group A12. Power pin group A11 includes multiple power pins (pins 1 to 8), and power pin group A12 includes multiple power pins (pins 73 to 80). Power pin groups A11 and A12 are connected to different power supply voltages. For example, power pin group A11 is connected to a 4.0V power supply voltage, and power pin group A12 is connected to a 3.0V power supply voltage.

[0063] In some embodiments, the power pin module may include a first power pin group and a second power pin group; the first power pin group is used to provide a first driving power voltage to the green and blue light-emitting elements of the lamp board; the second power pin group is used to provide a second driving power voltage to the red light-emitting element of the lamp board. The first driving power voltage and the second driving power voltage are different.

[0064] For example, Figure 8 As shown, the power pin module includes a first power pin group A11 and a second power pin group A12. The first power pin group A11 is used to provide a first driving power voltage for the green and blue light-emitting elements of the lamp board; the second power pin group A12 is used to provide a second driving power voltage for the red light-emitting element of the lamp board.

[0065] For common-cathode RGB-LED light boards, the negative terminals of all three colors of LEDs (red, green, and blue) are connected to the negative terminal of the power supply. Since the forward voltages of blue and green LEDs are similar, both blue and green LEDs can use the same power supply voltage. For example... Figure 8 The first power supply pin group A11 provides a first driving power supply voltage of 4.0V to the green and blue light-emitting elements of the LED board. The red LED has a lower turn-on voltage and can use 3.0V, for example... Figure 8 The second power supply pin group A12 provides a second driving power supply voltage of 3.0V for the red light-emitting element of the lamp board.

[0066] In some embodiments, the multiple pin modules may further include a power supply compensation pin module, which is used to provide a first driving power supply voltage to the green and blue light-emitting elements of the lamp board; the number of power supply pins in the first power supply pin group is the same as the number of power supply pins in the second power supply pin group, and is greater than the number of pins in the power supply compensation pin module.

[0067] Figure 9This is another schematic diagram of a common anode power supply pin connection provided in an embodiment of this application. When connecting a common anode lamp board, the first power supply pin group A11 (pins 1 to 8), the second power supply pin group A12 (pins 73 to 80), and the pins (pins 58 and 60) of the power supply compensation pin module A6 are all connected to the same voltage signal, for example, 4.0V.

[0068] Figure 10 This is another common-cathode power supply pin connection diagram provided for an embodiment of this application. (See diagram below.) Figure 10 As shown, when connecting a common-cathode LED panel, the first power pin group A11 provides a first driving power supply voltage of 4.0V to the green and blue LEDs of the panel. The second power pin group A12 provides a second driving power supply voltage of 3.0V to the red LED. The number of power pins in the first power pin group A11 is the same as the number of power pins in the second power pin group A12. Figure 9 The first power supply pin group A11 has 8 power supply pins (pins 1 to 8), and the second power supply pin group A12 has 8 power supply pins (pins 73 to 80). Since the sum of the currents of the green and blue light-emitting elements is greater than or approximately equal to the current of the red light-emitting element, this embodiment provides a power supply compensation pin module A6 to supplement it. The power supply compensation pin module A6 provides a first driving power supply voltage of 4.0V to the green and blue light-emitting elements of the lamp board, preventing insufficient power supply to the green and blue light-emitting elements. Figure 9 and Figure 10 The exemplary configuration of the power supply compensation pin module A6 includes two pins (pin 58 and pin 60). In other embodiments, the power supply compensation pin module A6 can also be used to power other modules, such as the memory of the lamp board, depending on actual needs.

[0069] It should be noted that the specific values ​​of the first driving power supply voltage and the second driving power supply voltage can be set according to the actual usage. This application embodiment does not limit the voltage values ​​of the first driving power supply voltage and the second driving power supply voltage. For example, the first driving power supply voltage is 3.8V or 4.2V, and the second driving power supply voltage is 2.8V or 3.2V.

[0070] In some embodiments, each power pin group can be configured to correspond one-to-one with each color light-emitting element; different power pin groups provide different power supply voltages. That is, embodiments of this application can also provide different power supply voltages for different color light-emitting elements of the lamp board, with each color light-emitting element corresponding to an independent power pin group, thereby achieving the provision of the optimal power supply voltage suitable for each color light-emitting element.

[0071] For example, when the light panel includes three types of light-emitting elements, namely green, blue and red, the first power supply pin group provides a first driving power voltage to the green light-emitting element of the light panel, the second power supply pin group provides a second driving power voltage to the blue light-emitting element of the light panel, and the third power supply pin group provides a third driving power to the red light-emitting element of the light panel, thereby providing the optimal power supply voltage for each light-emitting element.

[0072] It should be noted that the embodiments of this application do not limit the number of colors of light-emitting elements included in the lamp board or the number of power pins in each power pin group. The above examples are only used to illustrate the lamp board including green, blue, and red light-emitting elements, and are not intended to limit this application. The number of power pins in each power pin group can be the same or different. In practical applications, the corresponding number of power pins can be set according to the current and voltage requirements of each color light-emitting element.

[0073] In some embodiments, the multiple pin modules further include a serial data communication pin module, which includes a serial interface enable signal pin, a storage data output pin, a serial clock signal pin, and a storage data input pin.

[0074] Figure 11 A schematic diagram of another lamp board control interface provided in this application embodiment is shown below. Figure 11 As shown, the serial data communication pin module A5 includes a serial interface enable signal pin HUB_SPI_CS1 (pin 59), a storage data output pin HUB_SPI_MISO1 (pin 63), a serial clock signal pin HUB_SPI_CLK1 (pin 57), and a storage data input pin HUB_SPI_MOSI1 (pin 61). When the lamp board is equipped with non-volatile memory such as FLASH, the lamp board control interface can also communicate with the FLASH through the serial data communication pin module to store calibration data and the lamp board ID, perform calibration and optimization on the lamp board, and improve the display effect.

[0075] In this module architecture, the pin arrangement of the serial data communication pin module A5 can be interchanged, and the pin signals can be configured through the control system. Figure 11 Taking the serial data communication pin module A5 shown as having 4 pins as an example, there are 4! = 4 * 3 * 2 * 1 = 24 possible arrangements.

[0076] In some implementations, the lamp control interface may also include reserved pins. Figure 12 A schematic diagram of another lamp board control interface provided in this application embodiment is shown below. Figure 12As shown, the lamp board control interface includes six reserved pins: PreFuntion1, PreFuntion2 (pin 39), PreFuntion3 (pin 41), PreFuntion4 (pin 38), PreFuntion5 (pin 40), and PreFuntion6 (pin 42). In some scenarios, the number of display data signal pin groups can be reduced to include reserved pins. Figure 12 For example, two of the eight display data signal pin groups are reserved as pins.

[0077] In practical applications, the functions of the reserved pins can be limited according to the actual situation to meet specific usage requirements. It should be noted that this application does not limit the location of the reserved pins.

[0078] Figure 13 This is a specific example diagram of a lamp board control interface provided in an embodiment of this application. The lamp board control interface includes 80 pins. Figure 13The lamp control interface shown includes 8 sets of display data signal pin groups. These 8 sets are: Display Data Signal Pin Group A21, Display Data Signal Pin Group A22, Display Data Signal Pin Group A23, Display Data Signal Pin Group A24, Display Data Signal Pin Group A25, Display Data Signal Pin Group A26, Display Data Signal Pin Group A27, and Display Data Signal Pin Group A28. Display data signal pin group A21 includes red data signal pin H_R1 (pin 17), green data signal pin H_G1 (pin 19), and blue data signal pin H_B1 (pin 21); display data signal pin group A22 includes red data signal pin H_R2 (pin 18), green data signal pin H_G2 (pin 20), and blue data signal pin H_B2 (pin 22); display data signal pin group A23 includes red data signal pin H_R3 (pin 23), green data signal pin H_G3 (pin 25), and blue data signal pin H_B3 (pin 27); display data signal pin group A24 includes red data signal pin H_R4 (pin 24), green data signal pin H_G4 (pin 26), and blue data signal pin H_B4 (pin 28). Display data signal pin group A25 includes red data signal pin H_R5 (pin 31), green data signal pin H_G5 (pin 33), and blue data signal pin H_B5 (pin 35); display data signal pin group A26 includes red data signal pin H_R6 (pin 32), green data signal pin H_G6 (pin 34), and blue data signal pin H_B6 (pin 36); display data signal pin group A27 includes red data signal pin H_R7 (pin 37), green data signal pin H_G7 (pin 39), and blue data signal pin H_B7 (pin 41); display data signal pin group A28 includes red data signal pin H_R8 (pin 38), green data signal pin H_G8 (pin 40), and blue data signal pin H_B8 (pin 42).

[0079] Figure 13 The lamp board control interface shown supports multiple power supply schemes, including a first power supply pin group A11 (pins 1 to 8) and a second power supply pin group A12 (pins 73 to 80). The first power supply pin group A11 provides a first driving power supply voltage of 4.0V for the green and blue light-emitting elements of the lamp board, and the second power supply pin group A12 provides a second driving power supply voltage of 3.0V for the red light-emitting element of the lamp board. The lamp board control interface also includes a power supply compensation pin module A6 (pins 58 and 60) to provide a first driving power supply voltage of 4.0V for the green and blue light-emitting elements of the lamp board, preventing insufficient power supply to the green and blue light-emitting elements.

[0080] Figure 13 The lamp board control interface shown may further include a row decoding and latch signal pin module A3. The row decoding and latch signal pin module A3 includes six pins: row decoding signal pin HA1 (pin 45), row decoding signal pin HB1 (pin 46), row decoding signal pin HC1 (pin 47), row decoding signal pin HD1 (pin 48), row decoding signal pin HE1 (pin 49), and latch signal pin HLAT1 (pin 50). It should be noted that this embodiment does not limit the arrangement order of the different display color data signal pins.

[0081] In this modular architecture, the order of the decoding signal pins and latch signal pins can be interchanged. Figure 11 Taking the 6 pins shown as an example, there are 6! = 6 * 5 * 4 * 3 * 2 * 1 = 720 possible pin arrangements for the row decoding and latch signal pin module.

[0082] Figure 13 The lamp board control interface shown supports flash functionality, including the serial data communication pin module A5. The serial data communication pin module A5 includes the serial interface enable signal pin HUB_SPI_CS1 (pin 59), the storage data output pin HUB_SPI_MISO1 (pin 63), the serial clock signal pin HUB_SPI_CLK1 (pin 57), and the storage data input pin HUB_SPI_MOSI1 (pin 61).

[0083] Figure 13 The grayscale clock signal pin HGLCK (pin 54) and the data clock output pin HDCLK (pin 53) of the lamp board control interface shown in the diagram both have ground pins GND on both sides. The grayscale clock signal pin HGLCK can also be reused as the display enable signal pin OE1.

[0084] Figure 13 The control interface shown provides a good reference standard for high-performance display products, such as COB lamp board display products and small-pitch lamp boards with a large number of LED beads, and also enables the industry to have a unified and universal interface standard.

[0085] It should be noted that the display cabinet may require the use of multiple lamp boards. Therefore, based on the lamp board control interface concept of this application, the number of lamp board control interfaces can be set according to the number of lamp boards used in the display cabinet.

[0086] This application also provides a control board, including the lamp board control interface as described in any of the above embodiments. The specific definition and pin distribution of the lamp board control interface are not detailed here. The lamp board control interface can be, for example, a female connector or a male connector. The number of lamp board control interfaces on the control board can be set according to the actual application. The control board provided in this application includes the lamp board control interface board in the above embodiments, and therefore can achieve the same or at least similar technical effects as the above lamp board control interface embodiments, which will not be described again here.

[0087] This application also provides a light panel, characterized by including a light panel control interface as described in any of the above embodiments. The light panel control interface can be, for example, a female connector or a male connector. The number of light panel control interfaces on the light panel can be set according to actual application. The light panel provided in this application includes the light panel control interface board in the above embodiments, and therefore can achieve the same or at least similar technical effects as the above light panel control interface embodiments, which will not be elaborated further here.

[0088] This application also provides a display driving circuit, including a control board as described in any of the above embodiments and a lamp board as described in any of the above embodiments. Figure 14 This is a schematic diagram of a display driving circuit provided in an embodiment of this application. The display driving circuit includes a control board 100 and a lamp board 200. Both the control board 100 and the lamp board 200 include a lamp board control interface 300, which connects the control board 100 and the lamp board 200 for data transmission. For example, the lamp board control interface 300 on the control board 100 can be a female connector, and the corresponding lamp board control interface 300 on the lamp board 200 can be a male connector; or, for example, the lamp board control interface 300 on the control board 100 can be a male connector, and the corresponding lamp board control interface 300 on the lamp board 200 can be a female connector. Furthermore, the control board 100 may also include a control chip and a buffer circuit, etc. This embodiment of the application does not limit the structure of the control board 100, lamp board 200, etc.

[0089] This application also provides a display device, including the display driving circuit as described in any of the above embodiments. This application achieves the display effect of the display device through data transmission from the lamp board control interface and the control function of the display driving circuit.

[0090] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0091] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lamp panel control interface, characterized in that, Used to connect the control board and the lamp board, the lamp board control interface includes multiple pin modules; Each of the pin modules includes a plurality of pins; the plurality of pin modules includes at least a power pin module; A grounding pin is provided between adjacent pin modules; the number of grounding pins between the power pin module and other pin modules is greater than the number of grounding pins between other pin modules.

2. The lamp control interface according to claim 1, characterized in that, The plurality of pin modules further include a control signal pin module, the control signal pin module including a data clock output pin and a grayscale clock signal pin; Along the pin arrangement direction, grounding pins are provided on both sides of the data clock output pin and / or the grayscale clock signal pin.

3. The lamp control interface according to claim 1, characterized in that, The plurality of pin modules further include a control signal pin module, which includes a data clock output pin and a grayscale clock signal pin; the data clock output pin and the grayscale clock signal pin are located on different sides of the pin arrangement direction.

4. The lamp control interface according to claim 1, characterized in that, The plurality of pin modules further include a display data signal pin module, which includes M groups of display data signal pin groups; each display data signal pin group includes N different display color data signal pins; M and N are both positive integers greater than 1.

5. The lamp control interface according to claim 4, characterized in that, A grounding pin is provided between each X group of display data signal pins; where X is a positive integer greater than or equal to 1, and X is less than M.

6. The lamp control interface according to claim 1, characterized in that, The power pin module includes Y power pin groups, where Y is a positive integer greater than or equal to 2.

7. The lamp control interface according to claim 6, characterized in that, The power pin module includes a first power pin group and a second power pin group; The first power pin group is used to provide a first driving power voltage to the green and blue light-emitting elements of the lamp panel; the second power pin group is used to provide a second driving power voltage to the red light-emitting element of the lamp panel. The voltage of the first driving power supply is different from that of the second driving power supply.

8. The lamp control interface according to claim 7, characterized in that, The plurality of pin modules further include a power supply compensation pin module, which is used to provide a first driving power supply voltage for the green and blue light-emitting elements of the lamp board; the number of power supply pins in the first power supply pin group is the same as the number of power supply pins in the second power supply pin group, and is greater than the number of pins in the power supply compensation pin module.

9. The lamp control interface according to claim 6, characterized in that, Each of the power supply pin groups corresponds one-to-one with each color light-emitting element; different power supply pin groups provide different power supply voltages.

10. The lamp panel control interface according to claim 1, characterized in that, The plurality of pin modules further include a serial data communication pin module, which includes a serial interface enable signal pin, a storage data output pin, a serial clock signal pin, and a storage data input pin.

11. A control board, characterized in that, Includes the lamp panel control interface as described in any one of claims 1-10.

12. A light panel, characterized in that, Includes the lamp panel control interface as described in any one of claims 1-10.

13. A display driving circuit, characterized in that, It includes the control board as described in claim 11 and the lamp board as described in claim 12.

14. A display device, characterized in that, Includes the display driving circuit as described in claim 13.

Images