Receiving card

Abstract

The embodiment of the utility model provides a receiving card, and relates to the technical field of display. The receiving card supports a storage function by multiplexing and replacing pins of a lamp panel interface. The receiving card comprises a circuit board and a plurality of lamp panel interfaces, and any two pixel pins in the plurality of pixel pins are multiplexing pixel pins; one multiplexing pixel pin is also configured to transmit a clock signal of the storage chip and is electrically connected with one lamp panel pixel pin and one lamp panel clock pin of the lamp panel; the other multiplexing pixel pin is also configured to transmit a storage data input signal of the storage chip and is electrically connected with the other lamp panel pixel pin and the storage data input pin of the lamp panel; any two row decoding pins in the plurality of row decoding pins are replacement row decoding pins; one replacement row decoding pin is configured to transmit a chip selection signal of the storage chip, and the other replacement row decoding pin is configured to transmit a storage data output signal of the storage chip.

Description

Technical Field

[0001] The utility model relates to the field of display technology, in particular to a receiving card. Background Art

[0002] With the development of LED display technology, its application areas are becoming more and more extensive. At the same time, the development trend of the display industry is more functions and more convenient structures.

[0003] At present, the receiving card and light board in the LED application field are connected through the light board interface. This light board interface uses a cable to connect the receiving card and the light board module, which can support conventional lighting. However, since the light board interface does not have the transmission pin of the module Flash, it cannot support the module Flash function; the module Flash is the function of storing the module correction coefficient. Each module corresponds to its own correction coefficient. After the correction function is completed at the factory end, the data is stored in the module, and the correction coefficient is obtained from the module in actual use; if the light board interface does not have a signal connected to the Flash, this function cannot be realized. And with the entry of the Cob module into the channel market, the correction function of the module is a strong demand in the LED display industry. Utility Model Content

[0004] An embodiment of the utility model provides a receiving card, which supports a storage function by multiplexing and replacing pins of a light board interface.

[0005] The receiving card includes: a circuit board and a plurality of light board interfaces arranged on the circuit board, wherein the light board interfaces are configured to be electrically connected to the light board; the light board interfaces include: a plurality of pixel pins and a plurality of row decoding pins; and the light board includes: a memory chip.

[0006] Any two pixel pins among the multiple pixel pins are multiplexed pixel pins; one of the multiplexed pixel pins is also configured to transmit the clock signal of the storage chip, and is electrically connected to a light board pixel pin and a light board clock pin of the light board; the light board clock pin is electrically connected to the clock pin of the storage chip; another of the multiplexed pixel pins is also configured to transmit the storage data input signal of the storage chip, and is electrically connected to another light board pixel pin and a storage data input pin of the light board; the light board clock pin is electrically connected to the clock pin of the storage chip.

[0007] Any two row decoding pins among the multiple row decoding pins are replacement row decoding pins; one of the replacement row decoding pins is configured to transmit the chip select signal of the memory chip and is electrically connected to the light board chip select signal pin of the light board; the light board chip select signal pin is electrically connected to the chip select signal pin of the memory chip; another replacement row decoding pin is configured to transmit the storage data output signal of the memory chip and is electrically connected to the storage data output pin of the light board; the storage data output pin of the light board is electrically connected to the storage data output pin of the memory chip.

[0008] Based on the above scheme, some embodiments of the present application provide a receiving card, which multiplexes the functions of the pixel pin and the clock pin and the data receiving pin so that the light board interface is equivalent to having a clock pin and a data receiving pin; and by replacing some row decoding pins with chip select pins and data sending pins, the light board interface can have chip select pins and data sending pins without affecting the original function of the row decoding; after the light board interface has the functions of the clock pin, data receiving pin, chip select pin and data sending pin, the light board interface can realize the function of controlling the external Flash chip, so that when the current light board interface form remains unchanged, the signal multiplexing technology and replacement technology are used to be compatible with the signal line of the Flash chip, thereby satisfying the function of the receiving card to access the Flash chip.

[0009] In some embodiments, the plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin, and a blue pixel pin; N≥2, where N is a positive integer.

[0010] One of the multiplexed pixel pins is a red pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a red pixel pin in another group of pixel pins; or; one of the multiplexed pixel pins is a green pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a green pixel pin in another group of pixel pins; or; one of the multiplexed pixel pins is a blue pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a blue pixel pin in another group of pixel pins.

[0011] In some embodiments, when N=4, one of the multiplexed pixel pins is a blue pixel pin in the first group of pixel pins, and the other multiplexed pixel pin is a blue pixel pin in the second group of pixel pins.

[0012] In some embodiments, the plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin and a blue pixel pin; N≥1, where N is a positive integer.

[0013] One of the multiplexed pixel pins is any one pixel pin in a group of pixel pins, and the other multiplexed pixel pin is any other pixel pin in the same group of pixel pins.

[0014] In some embodiments, the plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin, and a blue pixel pin; N≥2, where N is a positive integer.

[0015] One of the multiplexed pixel pins is any pixel pin in a group of pixel pins, and the other multiplexed pixel pin is any pixel pin in another group of pixel pins; wherein the two multiplexed pixel pins are pixel pins of different colors.

[0016] In some embodiments, the light board interface further includes: a shift clock pin, a latch signal pin, a display enable signal pin and a plurality of ground pins; the shift clock pin and the latch signal pin are configured to write image data into the light board.

[0017] In some embodiments, the receiving card further includes: a plurality of power interfaces; the plurality of power interfaces are arranged on the circuit board; the power interfaces are electrically connected to a power module; and the power module is configured to supply power to the receiving card through the power interfaces.

[0018] In some embodiments, the receiving card further includes: a liquid crystal interface, a test button, a power indicator light, and a run indicator light; the liquid crystal interface, the test button, the power indicator light, and the run indicator light are arranged on the circuit board.

[0019] In some embodiments, the receiving card further includes: an Ethernet port; the Ethernet port is provided on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0021] Figure 1 A schematic diagram of a light board interface of an existing receiving card provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of a receiving card provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of an improved rear light board interface provided in an embodiment of the present application;

[0024] Figure 4A schematic diagram of another improved rear light board interface provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of another improved rear light board interface provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of another improved rear light board interface provided in an embodiment of the present application;

[0027] Figure 7 A schematic diagram of another improved rear light board interface provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of another improved rear light board interface provided in an embodiment of the present application;

[0029] Figure 9 A schematic diagram of another receiving card provided in an embodiment of the present application;

[0030] Figure 10 A schematic diagram of the connection between a receiving card and a light board provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connect" should be understood broadly. For example, they can refer to fixed connections, removable connections, or integral connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "connected" in this utility model have the meaning of conducting electricity. The specific meaning should be understood in the context.

[0035] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0036] As described in the background art, with the development of LED display technology, its application fields are becoming more and more extensive. At the same time, the development trend of the display industry is more functions and more convenient structures.

[0037] At present, the receiving card and the light board in the LED application field are connected through the light board interface. This light board interface uses a flat cable to connect the receiving card and the light board module, which can support conventional lighting. However, since the light board interface does not have the transmission pin of the module flash, it cannot support the module flash function; the module flash is the function of storing the module correction coefficient. Each module corresponds to its own correction coefficient. After the correction function is completed at the factory end, the data is stored in the module, and the correction coefficient is obtained from the module in actual use; if the light board interface does not have a signal connected to the Flash, this function cannot be realized, and with the on-board chip packaging module (chip-on-board, cob) entering the channel market, the correction function of the module is a strong demand in the LED display industry.

[0038] For example, refer to Figure 1 , Figure 1 This is a schematic diagram of a light board interface for an existing receiving card. This light board interface has a total of 26 pins, including: multiple RGB pixel pins (R1, G1, B1...R4, G4, B4), multiple ground pins GND, multiple decoding pins (HA1, HB1, HC1, HD1, HE1), and other pins.

[0039] It should be noted that Flash can refer to two different technologies: the first is multimedia and animation technology based on vector graphics, and the second is a non-volatile memory chip used to store data and program code. This application is the second type, and Flash is mainly used for non-volatile memory chips that store data and program code.

[0040] Flash memory chips (also known as flash memory) are non-volatile storage devices that can be erased and reprogrammed multiple times. They are widely used in various electronic devices, such as smartphones, tablets, digital cameras, and MP3 players. Flash memory chips are divided into two types based on their functional characteristics: NOR Flash and NAND Flash. NOR Flash typically has a smaller capacity and is primarily used for code storage, while NAND Flash has a larger capacity and is primarily used for data storage. In receiving card applications, NOR Flash with an SPI interface is predominantly used.

[0041] The receiving card's primary function is to receive image data from the sending card and convert this data into signals that the LED screen can recognize, thereby driving the screen to display the corresponding image. This process is similar to a translator, helping a computer or other device translate the desired information into a language the LED screen can understand. Specifically, the receiving card enables the screen to function properly by converting the computer's digital output signal into an analog signal that matches the display, and then converting the analog signal into the electrical signal required by the screen. The receiving card is also responsible for receiving data signals and controlling the brightness and color of the LEDs. It also converts information such as video, images, and text into the control signals required by the screen to achieve the desired display effect.

[0042] Based on this, the embodiment of the present application provides a receiving card. Figure 2 As shown, the receiving card 100 includes: a circuit board 10 and a plurality of light board interfaces 20 arranged on the circuit board.

[0043] The light board interface 20 is configured to be electrically connected to the light board 200 ; the light board interface 20 includes: a plurality of pixel pins X and a plurality of row decoding pins H. The light board 200 includes: a memory chip 210 .

[0044] In some embodiments, the memory chip 210 is a Flash chip.

[0045] In some embodiments, the plurality of pixel pins X include: N groups of pixel pins X; each group of pixel pins X includes: a red pixel pin R, a green pixel pin G, and a blue pixel pin B; N≥1, where N is a positive integer. The following embodiments are described using N=4 as an example.

[0046] The pixel pin X is configured to transmit pixel signals, thereby transmitting image data. The row decoder pin H is configured to transmit decoded signals. Since the display screen is a dynamic scanning form, one row is lit at a time, and a decoded signal is required for selection.

[0047] In some embodiments, a Flash chip is used on the light board, generally an SPI interface Flash, with a chip select pin SPI_CS, a clock pin SPI_CLK1, a data receiving pin SPI_MOSI, and a data sending pin SPI_MISO; the existing receiving card interface does not have a pin for operating Falsh. Without changing the number and specifications of the existing interface pins, it is necessary to introduce the functions of the above pins through multiplexing and replacement.

[0048] like Figure 2 and Figure 3 As shown, any two pixel pins X among the multiple pixel pins X are multiplexed pixel pins F; one multiplexed pixel pin F is also configured to transmit a clock signal of the memory chip 210, and is electrically connected to a light board pixel pin DX1 (DX) of the light board 200 and the light board clock pin DSPI_CLK; the light board clock pin DSPI_CLK is electrically connected to the clock pin FSPI_CLK of the memory chip 210.

[0049] Another multiplexed pixel pin F is also configured to transmit the storage data input signal of the storage chip 210, and is electrically connected to another light board pixel pin DX2 (DX) of the light board 200 and the storage data input pin DSPI_MOSI; the storage data input pin DSPI_MOSI is electrically connected to the storage data input pin FSPI_MOSI of the storage chip 210.

[0050] Among them, one multiplexed pixel pin F is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1, and another multiplexed pixel pin F is also configured to transmit the storage data input signal of the storage chip 210, which means it has the function of the data receiving pin SPI_MOSI.

[0051] That is to say, the functions of the clock pin and the data receiving pin (equivalent to the storage data input pin) in the SPI interface Flash are multiplexed with the pixel pin.

[0052] For example, Figure 3 The blue pixel pin B1 in the first group of pixel pins has the function multiplexed with the clock pin SPI_CLK1, that is, the pin can transmit both the blue pixel signal and the clock signal.

[0053] Figure 3The blue pixel pin B2 in the second group of pixel pins has the function multiplexed with the data receiving pin SPI_MOSI, that is, the pin can transmit both the blue pixel signal and the storage data input signal.

[0054] Any two row decoding pins H among the multiple row decoding pins H are replacement row decoding pins T; one replacement row decoding pin T is configured to transmit the chip select signal of the memory chip 210 and is electrically connected to the light board chip select signal pin DSPI_CS of the light board 200; the light board chip select signal pin DSPI_CS is electrically connected to the chip select signal pin FSPI_CS of the memory chip 210.

[0055] Another replacement row decoding pin T is configured to transmit the storage data output signal of the storage chip 210 and is electrically connected to the storage data output pin DSPI_MISO of the light board 200; the storage data output pin DSPI_MISO of the light board 200 is electrically connected to the storage data output pin FSPI_MISO of the storage chip 210.

[0056] Among them, one replacement row decoding pin T is configured to transmit the chip select signal, which means it has the function of the chip select pin SPI_CS and replaces the previous row decoding function; another replacement row decoding pin T is configured to transmit the storage data output signal of the light board, which means it has the function of the data sending pin SPI_MISO.

[0057] That is to say, the functions of the chip select pin SPI_CS and the data transmission pin SPI_MISO (equivalent to the storage data output pin) in the four-wire SPI are replaced with the row decoding pin H.

[0058] For example, refer to Figure 1 and Figure 3 It can be seen that the light board interface 20 includes five row decoding pins, namely: the first row decoding pin HA1, the second row decoding pin HA1, the third row decoding pin HC1, the fourth row decoding pin HD1, and the fifth row decoding pin HE1; Figure 3 It can be seen that the fourth row decoding pin HD1 has been replaced by the chip select pin SPI_CS, that is, this pin can only transmit the chip select signal.

[0059] Figure 3 The fifth row decoding pin HE1 has been replaced by the data sending pin SPI_MISO, that is, this pin can only transmit the storage data output signal of the light board.

[0060] It should be noted that Figure 3 This is just one example of a light board interface.

[0061] Based on the above scheme, some embodiments of the present application provide a receiving card, which multiplexes the functions of the pixel pin and the clock pin and the data receiving pin so that the light board interface is equivalent to having a clock pin and a data receiving pin; and by replacing some row decoding pins with chip select pins and data sending pins, the light board interface can have chip select pins and data sending pins without affecting the original function of the row decoding; after the light board interface has the functions of the clock pin, data receiving pin, chip select pin and data sending pin, the light board interface can realize the function of controlling the external Flash chip, so that when the current light board interface form remains unchanged, the signal multiplexing technology and replacement technology are used to be compatible with the signal line of the Flash chip, thereby satisfying the function of the receiving card to access the Flash chip.

[0062] In some embodiments, as Figures 4 to 6 As shown, the plurality of pixel pins X include: N groups of pixel pins; each group of pixel pins X includes: a red pixel pin R, a green pixel pin G and a blue pixel pin B; N≥2, where N is a positive integer.

[0063] like Figures 4 to 6 As shown, one multiplexed pixel pin F is a red pixel pin R in a group of pixel pins, and another multiplexed pixel pin F is a red pixel pin R in another group of pixel pins; or; one multiplexed pixel pin F is a green pixel pin G in a group of pixel pins, and another multiplexed pixel pin F is a green pixel pin G in another group of pixel pins; or; one multiplexed pixel pin F is a blue pixel pin B in a group of pixel pins, and another multiplexed pixel pin F is a blue pixel pin B in another group of pixel pins.

[0064] That is, the two multiplexed pixel pins are pixel pins of different groups but of the same color.

[0065] For example, refer to Figure 4 It can be seen that one multiplexed pixel pin F is the red pixel pin R1 in the first group of pixel pins, and is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1. Another multiplexed pixel pin F is the red pixel pin R2 in the second group of pixel pins, and is also configured to transmit the storage data input signal of the light board 200, which means it has the function of the data receiving pin SPI_MOSI.

[0066] Reference Figure 5 It can be seen that one multiplexed pixel pin F is the green pixel pin G1 in the first group of pixel pins, and is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1. Another multiplexed pixel pin F is the green pixel pin G2 in the second group of pixel pins, and is also configured to transmit the storage data input signal of the light board 200, which means it has the function of the data receiving pin SPI_MOSI.

[0067] Reference Figure 6 It can be seen that one multiplexed pixel pin F is the red pixel pin in the first group of pixel pins, and is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1. Another multiplexed pixel pin F is the red pixel pin in the second group of pixel pins, and is also configured to transmit the storage data input signal of the light board 200, which means it has the function of the data receiving pin SPI_MOSI.

[0068] It should be noted that Figures 4 to 6 This is only an embodiment of the first group of pixel pins and the second group of pixel pins, and the embodiments of other groups are not described one by one.

[0069] In some embodiments, as Figure 6 As shown, in the case of N=4, one multiplexed pixel pin F is the blue pixel pin B in the first group of pixel pins, and another multiplexed pixel pin F is the blue pixel pin B in the second group of pixel pins.

[0070] In some embodiments, as Figure 7 As shown, the plurality of pixel pins X include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin R, a green pixel pin G and a blue pixel pin B; N≥1, where N is a positive integer.

[0071] One multiplexed pixel pin is any pixel pin in a group of pixel pins, and another multiplexed pixel pin is any other pixel pin in the same group of pixel pins.

[0072] That is, the two multiplexed pixel pins are pixel pins of the same group.

[0073] For example, refer to Figure 7 It can be seen that one multiplexed pixel pin F is the green pixel pin G1 in the first group of pixel pins, and is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1. Another multiplexed pixel pin F is the blue pixel pin B1 in the first group of pixel pins, and is also configured to transmit the storage data input signal of the light board 200, which means it has the function of the data receiving pin SPI_MOSI.

[0074] It should be noted that Figure 7 This is only an embodiment of the first group of pixel pins, and the embodiments of other groups are not described one by one.

[0075] In some embodiments, the plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin, and a blue pixel pin; N≥2, where N is a positive integer.

[0076] One multiplexed pixel pin is any pixel pin in a group of pixel pins, and another multiplexed pixel pin is any pixel pin in another group of pixel pins; wherein the two multiplexed pixel pins are pixel pins of different colors.

[0077] That is, the two multiplexed pixel pins are pixel pins of different groups and different colors.

[0078] For example, refer to Figure 8 It can be seen that one multiplexed pixel pin F is the green pixel pin G1 in the first group of pixel pins, and is also configured to transmit the clock signal, which means it has the function of the clock pin SPI_CLK1. Another multiplexed pixel pin F is the blue pixel pin B2 in the second group of pixel pins, and is also configured to transmit the storage data input signal of the light board 200, which means it has the function of the data receiving pin SPI_MOSI.

[0079] It should be noted that Figure 8 This is only an embodiment of the first group of pixel pins and the second group of pixel pins, and the embodiments of other groups are not described one by one.

[0080] In some embodiments, as Figures 3 to 8 As shown, the light board interface 20 further includes: a shift clock pin HDCLK1 , a latch signal pin HLAT1 , a display enable signal pin HOE1 and a plurality of ground pins GND.

[0081] The shift clock pin HDCLK1 and the latch signal pin HLAT1 are configured to write the image data into the light board 200. HOE1 is the signal required for the LED driver IC to work and light up (refer to Figure 10 ).

[0082] In some embodiments, as Figure 9 As shown, the receiving card 100 further includes: a plurality of power interfaces 30 ; the plurality of power interfaces 30 are arranged on the circuit board 10 .

[0083] The power interface 30 is electrically connected to the power module; the power module is configured to supply power to the receiving card through the power interface.

[0084] In some embodiments, as Figure 9 As shown, the receiving card 100 further includes: a liquid crystal interface 40 , a test button 50 , a power indicator light 60 and a running indicator light 70 .

[0085] The liquid crystal interface 40, the test button 50, the power indicator light 60 and the operation indicator light 70 are arranged on the circuit board.

[0086] In some embodiments, as Figure 9 As shown, the receiving card 100 further includes: an Ethernet port 80 ; the Ethernet port 80 is provided on the circuit board 10 .

[0087] In some embodiments, the network port is an RJ45 network port. An RJ45 network port, also known as an RJ45 modular plug, is primarily used for terminating data cables, enabling connections and changes between devices and patch panel modules. This connector is required to have good conductivity to ensure reliable data transmission. An RJ45 network port can support the transmission of electrical and data signals, including Ethernet, telephone, and television signals, and is typically used to connect network devices such as computers, switches, and routers.

[0088] like Figure 10 As shown, the light board further includes: a first driver chip 220 , a second driver chip 230 and a plurality of current and voltage stabilizing chips 240 .

[0089] In some embodiments, a current regulator chip refers to a current-controlled voltage regulator, also known as an LED driver IC, that provides the bias current required to illuminate a single LED or multiple LEDs. By sensing the LED current across a resistor, the PWM duty cycle is controlled to adapt to variations in the LED's characteristics and maintain a constant current. A driver IC integrates multiple driver stages into a single electronic chip, providing compensation current to LEDs.

[0090] In some embodiments, after the light board interface is implemented, corresponding circuit support is required. The RGB signal given to the LED driver IC needs to match the pin voltage of the LED driver IC. Generally, the LED driver IC voltage ranges from 2.8v to 3.3v; the Flash voltage is fixed at 3.3v; and the receiving card pin requires a level of 3.3V.

[0091] from Figure 10 As you can see, the light board is electrically connected to the light board interface via the driver chip. Since the LED driver IC voltage ranges from 2.8V to 3.3V and the Flash voltage is fixed at 3.3V, separate power supplies are required. The first driver chip has pixel pins and other pins corresponding to the light board interface. The second driver chip has the clock pin FSPI_CLK1, chip select pin FSPI_CS, and storage data input pin FSPI_MOSI corresponding to the Flash chip.

[0092] To sum up, the light board interface transmits the image data to the current stabilizing chip of the light board via the first driver chip, thereby providing image data for the light board, and also stores the correction data on the storage chip 210. When used next time, the correction data stored on the Flash chip can be transmitted to the light board interface of the receiving card, and then transmitted to the light board through the light board interface, thereby providing suitable image data for the display screen.

[0093] The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited to this. Any changes or replacements within the technical scope disclosed in this utility model should be included in the scope of protection of the present utility model. Therefore, the scope of protection of the present utility model should be based on the scope of protection of the claims.

Claims

1. A receiving card, characterized in that: include: circuit boards; A plurality of light board interfaces are provided on the circuit board, wherein the light board interfaces are configured to be electrically connected to the light boards; The light board interface includes: a plurality of pixel pins and a plurality of row decoding pins; the light board includes: a memory chip; Any two pixel pins among the plurality of pixel pins are multiplexed pixel pins; one of the multiplexed pixel pins is further configured to transmit a clock signal of the memory chip and is electrically connected to a light board pixel pin and a light board clock pin of the light board; the light board clock pin is electrically connected to a clock pin of the memory chip; Another of the multiplexed pixel pins is further configured to transmit a storage data input signal of the storage chip, and is electrically connected to another light board pixel pin and a storage data input pin of the light board; the storage data input pin is electrically connected to a storage data input pin of the storage chip; Any two row decoding pins among the plurality of row decoding pins are replacement row decoding pins; one of the replacement row decoding pins is configured to transmit a chip select signal of the memory chip and is electrically connected to a light board chip select signal pin of the light board; the light board chip select signal pin is electrically connected to a chip select signal pin of the memory chip; Another replacement row decoding pin is configured to transmit the storage data output signal of the storage chip and is electrically connected to the storage data output pin of the light board; the storage data output pin of the light board is electrically connected to the storage data output pin of the storage chip.

2. The receiving card according to claim 1, wherein: The plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin and a blue pixel pin; N≥2, where N is a positive integer; One of the multiplexed pixel pins is a red pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a red pixel pin in another group of pixel pins; or; One of the multiplexed pixel pins is a green pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a green pixel pin in another group of pixel pins; or; One of the multiplexed pixel pins is a blue pixel pin in a group of pixel pins, and the other multiplexed pixel pin is a blue pixel pin in another group of pixel pins.

3. The receiving card according to claim 2, wherein: In the case of N=4, one of the multiplexed pixel pins is a blue pixel pin in the first group of pixel pins, and the other multiplexed pixel pin is a blue pixel pin in the second group of pixel pins.

4. The receiving card according to claim 1, wherein: The plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin and a blue pixel pin; N≥1, where N is a positive integer; One of the multiplexed pixel pins is any one pixel pin in a group of pixel pins, and the other multiplexed pixel pin is any other pixel pin in the same group of pixel pins.

5. The receiving card according to claim 1, wherein: The plurality of pixel pins include: N groups of pixel pins; each group of pixel pins includes: a red pixel pin, a green pixel pin and a blue pixel pin; N≥2, where N is a positive integer; One of the multiplexed pixel pins is any pixel pin in a group of pixel pins, and another of the multiplexed pixel pins is any pixel pin in another group of pixel pins; Wherein, the two multiplexed pixel pins are pixel pins of different colors.

6. The receiving card according to any one of claims 1 to 5, characterized in that: The light board interface further includes: a shift clock pin, a latch signal pin, a display enable signal pin and a plurality of ground pins; The shift clock pin and the latch signal pin are configured to write image data into the light board.

7. The receiving card according to claim 1, wherein: The receiving card further includes: a plurality of power interfaces; the plurality of power interfaces are arranged on the circuit board; the power interfaces are electrically connected to the power module; The power module is configured to supply power to the receiving card through the power interface.

8. The receiving card according to claim 1, wherein: The receiving card also includes: a liquid crystal interface, a test button, a power indicator light and a running indicator light; The liquid crystal interface, test button, power indicator light and operation indicator light are arranged on the circuit board.

9. The receiving card according to claim 1, wherein: The receiving card further includes: an Ethernet port; the Ethernet port is arranged on the circuit board.

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