Data conversion chip, data conversion method, LED display screen and LED display device

Abstract

The application discloses a data conversion chip, a data conversion method, an LED display screen and an LED display device. The data conversion chip is connected between a control system and a column pipe chip of an LED lamp panel, and comprises a receiving module configured to receive a latch enable signal and serial input data in a unified format from the control system; an analysis module connected with the receiving module and configured to analyze the serial input data according to the latch enable signal; a conversion module connected with the analysis module and configured to identify a model of the currently connected column pipe chip, to call a conversion rule uniquely corresponding to the model, to execute the conversion rule based on an analysis result, and to process the serial input data into target data suitable for the model of the column pipe chip; and a sending module configured to output the target data to the column pipe chip to light up an LED lamp array. The control system and the column pipe chip can be adapted by replacing or updating the data conversion chip, and upgrading can be realized without changing the PCB line structure of the LED lamp panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED display, in particular to a data conversion chip, a data conversion method, an LED display screen and an LED display device. BACKGROUND

[0002] With the rapid development of LED display screens towards high resolution, high refresh rate and modularization, LED display screens are increasingly widely used in various mobile terminals and electronic devices. A commonly used LED display screen usually includes a control system and an LED lamp panel, Figure 1 A schematic connection block diagram of an LED lamp panel and a control system in the prior art is shown. As Figure 1 shown, the LED display screen 10 includes a control system 300 and an LED lamp panel 20, the LED lamp panel 20 includes an LED lamp array 23 and a row driving chip 21 and a plurality of column driving chips 22 driving the LED lamp array 23, each column driving chip 22 is connected to a plurality of columns of LED lamps. The control system 300 provides serial input data SIN, a clock signal DCLK and a latch enable signal LE to the column driving chips 22 to drive the plurality of column driving chips 22, control the brightness of the lamp beads, and provide a line change signal NL to the row driving chip 21 to control the line change display, thereby jointly driving the LED lamp array 23.

[0003] However, due to the significant differences in model, data format and register setting of column driving chips 22 from different manufacturers and different generations, the control system 300 usually needs to write and maintain a set of data packing and configuration logic for each type of column driving chip 22, and needs to retain all supported configuration codes. Moreover, when updating and replacing the LED lamp panel 20, different column driving chips 22 are usually needed, and the control system 300 must be upgraded synchronously, which consumes many resources, leading to long development cycle, high maintenance cost, and is prone to display abnormalities due to version mismatch.

[0004] Therefore, in the prior art LED display screen, the control system must set configuration codes for different column driving chips, which is difficult to achieve the purpose of "one development, multiple model compatibility". SUMMARY

[0005] In order to solve the above technical problems, the present application provides a data conversion chip, a data conversion method, an LED display screen and an LED display device to solve the problems in the prior art.

[0006] According to one aspect of the present invention, a data conversion chip is provided, connected between a control system and a tube-type chip in an LED light panel, the tube-type chip being connected to an LED array. The data conversion chip includes: a receiving module for receiving a latch enable signal and serial input data with a unified format from the control system; a parsing module connected to the receiving module for parsing the serial input data according to the latch enable signal; a conversion module connected to the parsing module for identifying the model of the currently used tube-type chip, calling a conversion rule uniquely corresponding to that model, executing the conversion rule based on the parsing result, and processing the serial input data into target data compatible with the model of the tube-type chip; and a sending module for outputting the target data to the tube-type chip to illuminate the LED array, wherein the conversion rule and the model of the tube-type chip have a one-to-one mapping relationship.

[0007] Optionally, the serial input data includes register data, display data, and command data, and the conversion module performs data processing on at least the register data when executing the conversion rule.

[0008] Optionally, the data processing performed by the conversion module includes at least one of partial or complete numerical conversion, partial or complete numerical replacement, or numerical limiting.

[0009] Optionally, the control system is adapted to multiple data conversion chips, and all of the multiple data conversion chips provide a unified register definition to the control system, enabling the control system to send the serial input data in a unified format, and each data conversion chip is adapted to one or more models of the tube chip.

[0010] Optionally, the unified register definition includes: a general part, which includes at least the number of scans, the number of groups, and the number of display bits; and a special part, which includes specific register fields that correspond only to the model of the tube chip.

[0011] Optionally, the receiving module also receives a clock signal sent by the control system and sends the clock signal directly to the sending module, which then outputs the clock signal and the target data synchronously to the tube chip.

[0012] Optionally, the data conversion chip is cascaded with the tube chip and integrated together in the LED light board. The data conversion chip has multiple pins with the same pin definitions as the tube chip, including a data input pin, a latch input pin, a clock input pin, a data output pin, and a clock output pin.

[0013] Optionally, the conversion module identifies the model of the currently connected tube chip by reading the model identifier pre-stored in the built-in storage module of the data conversion chip; or, the conversion module identifies the model of the currently connected tube chip by parsing the register field sent by the control system via the serial input data; or, the conversion module identifies the model of the currently connected tube chip by sampling the level or encoding of the configuration pin of the data conversion chip.

[0014] Optionally, the conversion module includes a numerical protection module, which converts the register data issued by the control system into preset protection data related to the model of the tube chip, so as to limit the current or voltage within a safe threshold.

[0015] According to another aspect of the present invention, a data conversion method is provided, applied in an LED display screen, wherein the data conversion method includes: receiving a latch enable signal and serial input data with a uniform format from a control system; parsing the serial input data according to the latch enable signal; identifying the model of the currently used tube chip, calling a conversion rule uniquely corresponding to the model, executing the conversion rule based on the parsing result, processing the serial input data into target data adapted to the model of the tube chip; and outputting the target data to the tube chip to light up the LED array, wherein the conversion rule and the model of the tube chip have a one-to-one mapping relationship.

[0016] According to another aspect of the present invention, an LED display screen is provided, comprising a control system and an LED light board, wherein the LED light board comprises: a plurality of cascaded tube chips; an LED array connected to and driven by the plurality of tube chips; and the aforementioned data conversion chip, wherein the data conversion chip is cascaded with the plurality of tube chips and is located in the first stage, and is connected to the control system.

[0017] Optionally, the tube chip receives a latch enable signal sent by the control system and the target data and clock signal sent by the data conversion chip, and modifies the value of its own register according to the clock signal and the target data under the control of the latch enable signal.

[0018] According to another aspect of the present invention, an LED display device is provided, comprising: a drive control circuit; and the aforementioned LED display screen, wherein the LED display screen receives and processes serial input data sent by the control system through the data conversion chip to display images or text.

[0019] This invention provides a data conversion chip, a data conversion method, an LED display screen, and an LED display device. These components perform data conversion between a control system and a tube array chip. By identifying the model of the downstream tube array chip and calling a conversion rule uniquely mapped to that model, the unified format serial input data issued by the control system is converted into target data uniquely corresponding to the model. This provides different forms of input data for different models of tube array chips to illuminate the LED light panel. Therefore, when replacing the LED light panel with different models of tube array chips from different manufacturers, the control system can ensure that the tube array chip can always illuminate the LED light array without modifying firmware or configuration code. This simplifies control system design, achieves "plug and play," and significantly shortens the project iteration cycle.

[0020] Furthermore, at least the register data in the serial input data is processed according to the conversion rules to modify the register values ​​of the tube converter chip, ensuring the normal operation of different tube converter chips. This transfers the adaptation work of the control system to the data conversion chip. The control system can shield itself from the differences in tube converter chips, requiring only a single set of unified code to adapt to various models of tube converter chips, saving resources and accelerating the adaptation process.

[0021] Furthermore, the data conversion chip and the tube chip are cascaded and share the same multiple input and output pins. The unified interface definition allows the control system to directly transmit data to the data conversion chip using the existing driver, saving hardware design costs. Moreover, when LED light boards are upgraded, the new tube chip can be directly embedded into the LED light board, enabling rapid integration of the tube chip into the control system without any changes to the PCB circuitry and wiring, reducing hardware replacement costs and risks. After production, the new LED light board only needs to complete the mapping between the tube chip model and the conversion rules; screen verification can be performed directly without adaptation, accelerating product production.

[0022] Furthermore, the control system can be adapted to multiple data conversion chips, all of which provide a unified register definition to the control system, enabling the control system to send serial input data in a unified format. The unified register definition also reserves dedicated fields, so when adapting to newer tube-type chips, only the conversion rules need to be extended within the data conversion chip itself. Therefore, having the LED light board manufacturer provide both the data conversion chip and the tube-type chip allows for unified control and configuration of the tube-type chip, expands the applicability of the control system, and accelerates the upgrade and replacement of LED light boards.

[0023] Furthermore, the conversion module can perform numerical protection. When the serial input data sent by the control system exceeds the range that the tube chip can withstand, the numerical protection module converts the register data into preset protection data related to the model of the tube chip to limit the current or voltage within a safe threshold, prevent the control system from tampering with the data, and protect hardware security.

[0024] It should be noted that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0025] Figure 1 A schematic connection diagram of an LED light panel and a control system in the prior art is shown;

[0026] Figure 2 A schematic structural block diagram of an LED display screen and a data conversion chip according to a first embodiment of the present invention is shown;

[0027] Figure 3 A schematic structural block diagram of a data conversion chip according to a second embodiment of the present invention is shown;

[0028] Figure 4 A schematic structural block diagram of a data conversion chip according to a third embodiment of the present invention is shown;

[0029] Figure 5 A schematic flowchart of a data conversion method according to an embodiment of the present invention is shown. Detailed Implementation

[0030] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in various forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0031] Figure 2 A schematic structural block diagram of an LED display screen and a data conversion chip according to a first embodiment of the present invention is shown.

[0032] like Figure 2 As shown, this embodiment of the invention provides an LED display screen 100, which includes a control system 300 and an LED light board 200. The LED light board 200 includes at least one LED chip 220 and an LED array 230 driven by the at least one LED chip 220. When multiple LED chips 220 are included, the multiple LED chips 220 are cascaded in sequence, and each LED chip 220 is connected to multiple rows of LEDs.

[0033] Compared to Figure 1In addition to the existing technology, the LED light board 200 of this embodiment further includes a data conversion chip 210. The data conversion chip 210 is cascaded with multiple tube-type transistor chips 220 and is located in the first stage. The data conversion chip 210 is also connected to the control system 300. That is, the data conversion chip 210 is connected between the control system 300 and the tube-type transistor chips 220 of the LED light board, and the data conversion chip 210 and the tube-type transistor chips 220 are integrated together within the LED light board 200. The data conversion chip 210 has multiple pins with pin definitions consistent with those of the tube-type transistor chips 220. These multiple pins include, for example, data input pins, latch input pins, clock input pins, data output pins, and clock output pins. The aforementioned multiple pins are... Figure 1 and Figure 2 This is reflected in the text.

[0034] The data conversion chip 210 internally includes a parsing module 212, a conversion module 213, a receiving module 211, and a transmitting module 214. The receiving module 211 receives the latch enable signal LE and the clock signal DCLK from the control system 300 via the latch input pin and clock input pin, respectively. It also receives serial input data SIN with a unified format from the control system 300 via the data input pin. The receiving module 211 directly sends the clock signal DCLK to the transmitting module 214 and inputs the latch enable signal LE and the serial input data SIN to the parsing module 212. The parsing module 212 parses the serial input data SIN based on the latch enable signal LE. The serial input data SIN includes, for example, register data, display data, and command data. Based on the parsing result, the data type and length of the data sent by the control system 300 can be determined. The conversion module 213 is connected to the parsing module 212, identifies the model of the currently used (or connected) tube chip 220, calls the conversion rule uniquely corresponding to that model, and executes the conversion rule based on the parsing result to process the serial input data SIN into target data SOUT that matches the model of the tube chip 220. The transmitting module 214 synchronously outputs the target data SOUT and the clock signal DCLK to the tube chip 220 through the data output pin and clock output pin, respectively, to light up the LED array 230.

[0035] Furthermore, the conversion module 213 stores conversion rules, and there is a one-to-one mapping between the conversion rules and the model of the tube chip 220. Different models correspond to different conversion rules to obtain different target data SOUT. The serial input data SIN includes various types of data, and the conversion module 213 performs data processing on at least the register data when executing the conversion rules. The data processing performed by the conversion module 213 includes at least one of partial or complete numerical conversion, partial or complete numerical replacement, or numerical limiting. For example, generating one or more associated values ​​based on one or more input values ​​is equivalent to numerical conversion. Alternatively, directly replacing an entire segment of data with a new segment of data is equivalent to numerical replacement. Or, limiting certain values ​​in the data is equivalent to adjusting the amplitude. Of course, in some special cases, no data processing may be performed, and the serial input data SIN can be directly used as the target data SOUT.

[0036] See also Figure 2 After receiving the latch enable signal LE from the control system 300 and the target data SOUT and clock signal DCLK from the data conversion chip 210, the tube chip 220 modifies the value of its own register according to the clock signal DCLK and the target data SOUT under the control of the latch enable signal LE. That is, the tube chip 220 updates the value of its own register after receiving the latch enable signal LE, thereby lighting up the LED array 230. The preceding tube chip 220 sequentially transmits the target data SOUT and clock signal DCLK to the following tube chip 220.

[0037] In this embodiment, the control system 300 can be adapted to multiple data conversion chips 210 provided by the same LED display manufacturer. All data conversion chips 210 provide a unified register definition to the control system 300, enabling the control system 300 to send serial input data SIN in a unified format. Each data conversion chip 210 is compatible with one or more types of tube chips 220. That is, one data conversion chip 210 can be compatible with one or more tube chips 220; for example, it can be compatible with five types of tube chips 220, storing five sets of conversion rules. The LED light board 200 manufacturer can set the types of tube chips 220 that the data conversion chip 210 can be compatible with according to actual needs. If the data conversion chip 210 only stores one conversion rule, when the LED light board 200 needs to be upgraded, both the tube chip 220 and the data conversion chip 210 can be replaced simultaneously, or only the tube chip 220 can be replaced while updating the conversion rules inside the data conversion chip 210. Updates can be made, for example, by programming the data in the storage module inside the data conversion chip 210 to change the conversion rules. In some specific embodiments, the control system 300 can also be adapted to multiple data conversion chips 210 provided by multiple LED display manufacturers.

[0038] The control system 300 can connect to multiple different data conversion chips 210, each with a unified interface and register definition. The unified register definition provided by the data conversion chip 210 includes a general part and a special part. The general part includes at least the number of scans, groups, and display bits, used to control the lighting of the LEDs. The special part contains specific register fields corresponding only to the model of the LED array 220, used to adjust the display quality of the LED array 230. The LED array 220 can adjust the display quality based on the data transmitted from the special part after ensuring the LED array 230 is lit. That is, the control system 300 sends unified register data, and the conversion module 213 adjusts the register data to enable the LED array 220 to light up and adjust the brightness and display quality of the LEDs. Of course, the register data corresponding to the special part sent by the control system 300 can also be empty. The aforementioned multiple unified interfaces or unified definitions mean that the content of the data sent each time is the same, but the specific values ​​can differ.

[0039] In this embodiment, since the data conversion chip 210 has completed the data mapping and conversion, the tube chip 220 only needs to receive the target data SOUT according to the conventional timing and perform the lighting operation. Therefore, the lamp board manufacturer can replace the tube chip 220 of different manufacturers or different generations without modifying the PCB wiring, and the control system 300 can still drive the LED lamp board 200 correctly, which significantly reduces the maintenance and upgrade costs.

[0040] In this embodiment, the data conversion chip 210 can also be configured with a configuration pin to receive configuration data CON, and the model of the tube chip 220 can be identified based on the configuration data CON. That is, the conversion module 213 identifies the model of the currently connected tube chip 220 by sampling the level or code of the configuration pin of the data conversion chip 210. In other embodiments, there may be other ways to determine the model of the tube chip 220. Figure 3 This will be introduced in the middle.

[0041] Figure 3 A schematic block diagram of a data conversion chip according to a second embodiment of the present invention is shown.

[0042] like Figure 3 As shown, the data conversion chip 210 in Figure 2 In addition, it can also have a built-in storage module 215, which can store data related to the model of the tube chip 220, such as the model identifier. The model identifier of the tube chip 220 can be changed by programming the storage module 215. The storage module 215 is, for example, OTP. At this time, the conversion module 213 identifies the model of the currently connected tube chip 220 by reading the model identifier pre-stored in the storage module 215.

[0043] In other embodiments, the model type of the tube chip 220 can also be issued by the control system 300, that is, the conversion module 213 parses the register field issued by the control system 300 through the serial input data SIN to identify the model of the currently connected tube chip 220.

[0044] Thanks to the conversion module 213, the new LED chip 220 can be adapted without changing the function and definition of the serial input data SIN and the clock signal DCLK. That is, the PCB circuit structure of the LED board 200 remains unchanged, and the LED board 200 can be upgraded by replacing (or updating) the data conversion chip 210 and the new LED chip 220.

[0045] Figure 4 A schematic block diagram of a data conversion chip according to a third embodiment of the present invention is shown.

[0046] During production and use, various indicators of the LED display screen 100, such as the screen current, require protection. Existing technology typically relies on software protection provided by the control system 300. However, this software setting can be manually disabled, potentially affecting screen safety. Specifically, the control system 300 might send data exceeding a threshold, which could interfere with the drive of the LED array 230 by the tube chip 220, causing display problems. Therefore, this embodiment also provides a numerical protection module 216 for numerical protection.

[0047] like Figure 4 As shown, the conversion module 213 in this embodiment may further include a value protection module 216. The value protection module 216 converts the register data sent by the control system 300 into preset protection data related to the model of the tube chip 220, so as to limit the current or voltage within a safe threshold. That is, the value protection module 216 only protects the data, such as the register data. Regardless of whether the register data sent by the control system 300 exceeds or does not exceed the threshold, the value protection module 216 can convert it into preset protection data limited by the specific tube chip 220, preventing the control system 300 from tampering with the data. This ensures that the screen current and voltage are within safe index ranges. It is equivalent to numerically locking a specific part of the register data, protecting the current register from a hardware perspective to keep it within a safe range.

[0048] Figure 5 A schematic flowchart of a data conversion method according to an embodiment of the present invention is shown.

[0049] like Figure 5As shown, the data conversion method of this embodiment is applicable to the LED display screen 100, LED light board 200 and data conversion chip 210 mentioned in any of the above embodiments, and specifically includes steps S101-S104.

[0050] In step S101, a latch enable signal and serial input data with a uniform format are received from the control system.

[0051] In step S102, the serial input data is parsed according to the latch enable signal.

[0052] In step S103, the model of the currently used tube chip is identified, and the conversion rule uniquely corresponding to the model is invoked. Based on the parsing result, the conversion rule is executed to process the serial input data into target data that is compatible with the model of the tube chip.

[0053] In step S104, the target data is output to the tube chip to light up the LED array.

[0054] Since the functions and relationships of each module have already been described in the above embodiments, they will not be repeated here. The data conversion method can be implemented based on the working principles described in the above embodiments.

[0055] Therefore, in existing technologies, driving an LED array first requires querying the model of the LED chip and the cascading relationship of the LED chips on the LED board; then, the control system modifies the configuration data and configuration method to control a specific model of LED chip; subsequently, the data arrangement and configuration data are adjusted to control the LED board; and finally, the configuration data is modified to achieve the optimal display effect. However, the data conversion method of this embodiment only requires querying the model of the LED chip, the configuration related to the display effect, and the cascading relationship of the LED chips. Then, according to a general control method, the data arrangement and configuration data are adjusted to control the LED board, thereby modifying the relevant configurations corresponding to the display effect to achieve the optimal display effect. In other words, the control system can control multiple different LED chips using a unified control method.

[0056] This embodiment may further provide an LED display device, which includes, for example, a drive control circuit and the aforementioned LED display screen. The LED display screen receives and processes serial input data sent by the control system through a data conversion chip to display images or text. The LED display device is, for example, assembled from multiple LED display screens.

[0057] It should be noted that the numerical values ​​in this article are for illustrative purposes only. In other embodiments of the present invention, other numerical values ​​may be sampled to implement this solution. The specific values ​​should be reasonably set according to the actual situation, and the present invention does not limit them.

[0058] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

[0059] It should also be understood that the terminology and expressions used herein are for descriptive purposes only, and one or more embodiments described herein should not be limited to these terms and expressions. The use of these terms and expressions does not exclude any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

Claims

1. A data conversion chip connected between a control system and a column pipe chip of an LED light panel, the column pipe chip connecting an LED light array, wherein, The data conversion chip comprises: a receiving module configured to receive a latch enable signal and serial input data with a unified format from a control system; a parsing module connected with the receiving module and configured to parse the serial input data according to the latch enable signal; a conversion module connected with the parsing module, configured to identify a model of the column pipe chip currently used, to call a conversion rule uniquely corresponding to the model, and to execute the conversion rule based on a parsing result to process the serial input data into target data adapted to the model of the column pipe chip; a sending module configured to output the target data to the column pipe chip to light up the LED lamp array, wherein the conversion rule and the model of the column pipe chip are in a one-to-one mapping relationship, the control system is adapted to multiple data conversion chips, and the multiple data conversion chips all provide a unified register definition to the control system, so that the control system issues the serial input data in a unified format, and each data conversion chip is adapted to one or more models of the column pipe chip.

2. The data conversion chip of claim 1, wherein, The serial input data comprises register data, display data and command data, and the conversion module at least processes the register data when executing the conversion rule.

3. The data conversion chip of claim 2, wherein, The data processing performed by the conversion module comprises at least one of partial or complete numerical conversion, partial or complete numerical replacement or numerical clipping.

4. The data conversion chip of claim 1, wherein, The unified register definition comprises: a general part containing at least scan number, group number and display bit number; and a special part containing specific register fields corresponding to the model of the column pipe chip only.

5. The data conversion chip of claim 1, wherein, The receiving module further receives a clock signal sent by the control system and directly sends the clock signal to the sending module, and the sending module synchronously outputs the clock signal and the target data to the column pipe chip.

6. The data conversion chip of claim 5, wherein, The data conversion chip and the column pipe chip are cascaded and collectively integrated in the LED lamp panel, the data conversion chip has multiple pins consistent with pin definitions of the column pipe chip, and the multiple pins comprise data input pins, latch input pins, clock input pins, data output pins and clock output pins.

7. The data conversion chip of claim 1, wherein, The conversion module identifies the model of the column pipe chip currently connected by reading a pre-stored model identifier in a storage module built in the data conversion chip, or by parsing register fields issued by the control system through the serial input data, or by sampling levels or encodings of configuration pins of the data conversion chip.

8. The data conversion chip of claim 2, wherein, The conversion module comprises a numerical protection module configured to convert register data issued by the control system into preset protection data related to the model of the column pipe chip to limit current or voltage within a safety threshold.

9. A data conversion method applied to the data conversion chip of any one of claims 1-8, wherein, The data conversion method comprises: receiving a latch enable signal and serial input data with a unified format from a control system; parsing the serial input data according to the latch enable signal; identifying a model of a current column chip to call a conversion rule uniquely corresponding to the model, executing the conversion rule based on the analysis result to process the serial input data into target data adapted to the model of the column chip; outputting the target data to the column chip to light up an LED lamp array, wherein the conversion rule and the model of the column chip are in a one-to-one mapping relationship.

10. An LED display screen comprising a control system and an LED light panel, wherein, The LED lamp panel comprises: a plurality of cascaded column chips; an LED lamp array connected with and driven by the plurality of column chips; and The data conversion chip of any one of claims 1-8 is cascaded with the plurality of column chips and located at a first stage, and connected with the control system.

11. The LED display screen of claim 10, wherein, The column chip receives a latch enable signal sent by the control system and the target data and clock signal sent by the data conversion chip, and modifies the value of its own register according to the clock signal and the target data under the control of the latch enable signal.

12. An LED display device, comprising: a driving control circuit; and The LED display screen of any one of claims 10-11, wherein the LED display screen receives and processes serial input data issued by the control system through the data conversion chip to display images or text.

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