CN116343659A

CN116343659A - Signal transmission chip, display module assembly and display screen

Info

Publication number: CN116343659A
Application number: CN202310586887.6A
Authority: CN
Inventors: 唐永生; 高兴波; 申石林; 刘阿强
Original assignee: Chengdu Lipson Microelectronics Co ltd
Current assignee: Chengdu Lipson Microelectronics Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-06-27
Anticipated expiration: 2043-05-24
Also published as: CN116343659B; CN116798347A

Abstract

The invention discloses a signal transmission chip, a display module and a display screen, and particularly relates to the technical field of LED display screens, wherein the signal transmission chip comprises: the device comprises a triggering module, a storage module and a processing module; the storage module stores a first parameter for configuring the driving current of the constant current driving chip; the trigger module is used for generating a trigger signal; the processing module is used for processing the first parameter in the storage module according to the trigger signal so as to output a second communication signal which can be identified by the constant current driving chip. The signal transmission chip provided by the invention realizes the configuration of the default driving current of the constant current driving chip without the external resistor by storing and processing the first parameter, and on the basis, a display screen user can also adjust the driving current of the constant current driving chip without the external resistor based on the existing controller, thereby being suitable for the existing use habit of the display screen user.

Description

Signal transmission chip, display module assembly and display screen

Technical Field

The invention relates to the technical field of LED display screens, in particular to a signal transmission chip, a display module and a display screen.

Background

An LED (english full name Light mitting diode, light emitting diode) display screen is a dot matrix module or a pixel unit formed by using light emitting diodes, and is widely used in the information display field with the characteristics of high reliability, long service life, strong environment adaptation capability, low use cost, and the like.

A complete LED display screen generally comprises a display module, a controller and other components, wherein a constant current driving chip is arranged on the display module, and can generate stable driving current to enable the LED display screen to work stably, so that a decisive key effect is played on the quality of the LED display screen. In different display environments, the driving current of the constant current driving chip needs to be adjusted by a controller.

In a specific application, the current constant current driving chip generates driving current based on an external resistor installed on the display module, the external resistor is generally configured by a display screen manufacturer, and the external resistor is fixed after the display module leaves the factory. If the driving current generated by the constant current driving chip based on the external resistor is called default driving current, after the display module leaves the factory, the default driving current which can be generated by each constant current driving chip is fixed. Therefore, the controller can directly send current gain to the constant current driving chip, so that the default driving current of the constant current driving chip is regulated, and the constant current driving chip outputs target driving current.

Along with the continuous improvement of the integration requirement, a constant current driving chip without an external resistor is already proposed in the market, and the constant current driving chip is a chip which can still generate driving current without based on the external resistor on the display module. Obviously, for the constant current driving chip without the external resistor, a display screen manufacturer cannot generate default driving current in a mode of configuring the external resistor, so that the constant current driving chip does not have default driving current, and a controller cannot directly control the constant current driving chip to output target driving current based on current gain, and popularization of the constant current driving chip without the external resistor is further hindered.

Disclosure of Invention

The invention provides a signal transmission chip, a display module and a display screen, which aim to solve the technical problems and realize the configuration of the driving current of a constant current driving chip without external resistor, so that a display screen user can also adjust the driving current of the constant current driving chip without external resistor based on the existing controller, and the display screen is suitable for the existing use habit of the display screen user.

In order to solve the above-mentioned problems, from a first aspect, the present invention discloses a signal transmission chip, the signal transmission chip comprising: the device comprises a triggering module, a storage module and a processing module;

The storage module stores a first parameter for configuring the driving current of the constant current driving chip;

the trigger module is used for generating a trigger signal;

the processing module is used for processing the first parameter in the storage module according to the trigger signal so as to output a second communication signal which can be identified by the constant current driving chip.

In an embodiment of the present invention, the trigger module includes a protocol parsing sub-module; the protocol analysis sub-module is used for analyzing the first communication signal received by the signal transmission chip and generating a trigger signal.

Optionally, the protocol analysis sub-module further includes an analysis unit and a counting unit; the analysis unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the counting unit to count when the first communication signal is a target signal; the counting unit generates a trigger signal when the count of the target signal exceeds a first preset threshold.

Optionally, the protocol analysis sub-module further includes an analysis unit and a timing unit; the analysis unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the timing unit to start timing when the first communication signal is a target signal; the timing unit is used for generating a trigger signal after timing the first preset time length.

In an embodiment of the present invention, the trigger module includes a power-on reset sub-module; the power-on reset submodule is used for generating a trigger signal directly or after time delay after the signal transmission chip is powered on.

With respect to the processing module of the present invention, it can be implemented in different ways:

in one embodiment of the present invention, the processing module includes a control sub-module and a protocol processing sub-module; the control sub-module is used for controlling the first parameter in the storage module to be read out according to the trigger signal; the protocol processing sub-module is used for converting the read first parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

In another embodiment of the present invention, the trigger signal comprises a first trigger signal; the processing module comprises a control sub-module, an operation sub-module and a protocol processing sub-module; the control sub-module is used for controlling the first parameter in the storage module to be read out according to the first trigger signal; the operation submodule is used for operating the read first parameter and the second parameter to generate a third parameter; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the protocol processing sub-module is used for converting the third parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

Wherein the third parameter may be output after generation in any of the following ways:

optionally, the third parameter is processed by the protocol processing sub-module after being generated and then output to the outside of the signal transmission chip.

Optionally, the trigger signal further includes a second trigger signal; the control sub-module is further used for storing the third parameter generated by the operation sub-module, and controlling the stored third parameter to be transmitted to the protocol processing sub-module according to the second trigger signal so as to be processed by the protocol processing sub-module and then output to the outside of the signal transmission chip.

In a further embodiment of the present invention, the storage module further stores a third parameter range; the trigger signal comprises a first trigger signal; the processing module comprises a control sub-module, an operation sub-module, a judgment sub-module and a protocol processing sub-module; the control sub-module is used for controlling the first parameter in the storage module to be read out according to the first trigger signal; the operation submodule is used for operating the read first parameter and the second parameter to generate a third parameter; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the judging sub-module judges the third parameter based on the third parameter range in the storage module and outputs a target third parameter based on the judging result; the protocol processing sub-module is used for converting the target third parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

Optionally, the third parameter is Z, and the third parameter range is Z [0:X ];

if the judgment result is that Z < X, the judgment sub-module outputs Z as a target third parameter;

if the judgment result is Z < Z0, the judgment sub-module outputs Z0 as a target third parameter;

if the judging result is Z [ X ] < Z, the judging sub-module outputs Z [ X ] as a target third parameter.

Similarly, according to the present embodiment, the target third parameter may be output after being generated in any of the following manners:

optionally, the target third parameter is output to the outside of the signal transmission chip after being processed by the protocol processing sub-module after being generated.

Optionally, the trigger signal further includes a second trigger signal; the control sub-module is further used for storing the target third parameter output by the judging sub-module, and controlling the stored target third parameter to be transmitted to the protocol processing sub-module according to the second trigger signal so as to be processed by the protocol processing sub-module and then output to the outside of the signal transmission chip.

In a further embodiment of the present invention, the storage module further stores a second parameter range; the trigger signal comprises a first trigger signal; the processing module comprises a control sub-module, a judging sub-module, an operating sub-module and a protocol processing sub-module; the control sub-module is used for controlling the first parameter in the storage module to be read out according to the first trigger signal; the judging sub-module judges the second parameter based on the second parameter range in the storage module and outputs a target second parameter based on the judging result; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the operation submodule is used for operating the read first parameter and the target second parameter to generate a third parameter; the protocol processing sub-module is used for converting the third parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

Optionally, the second parameter is G, and the second parameter range is G [0:X ];

if the judgment result is G0 < G X, the judgment sub-module outputs G as a target second parameter;

if the judgment result is G < G0, the judgment sub-module outputs G0 as a target second parameter;

if the judging result is that G [ X ] is less than G, the judging sub-module outputs G [ X ] as a target second parameter.

With reference to any one of the foregoing embodiments, in an embodiment of the present invention, the signal transmission chip further includes a selection module; the selection module selects and outputs the first communication signal received by the signal transmission chip or the second communication signal transmitted by the processing module based on the gating signal.

Based on the embodiment of the invention, optionally, a signal enhancer is arranged between the output end of the selection module and the output end of the signal transmission chip.

In addition, the signal transmission chip also has the function of controlling the constant current driving chip to reduce unnecessary energy consumption.

In an embodiment of the present invention, when the signal transmission chip does not receive the display data for transmitting to the constant current driving chip within the second preset time period, the processing module is further configured to output a preconfigured energy saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

In another embodiment of the present invention, when the display data received by the signal transmission chip and used for being transmitted to the constant current driving chip is all 0, the processing module is further used for outputting a preconfigured energy saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

From a second aspect, the invention also discloses a display module, which comprises a constant current driving chip and the signal transmission chip according to the first aspect of the invention, wherein the signal transmission chip is directly or indirectly connected with the constant current driving chip.

From a third aspect, the invention also discloses a display screen, which comprises a controller and the display module according to the second aspect of the invention, wherein the controller is connected with the constant current driving chip through the signal transmission chip.

The invention has the following advantages:

the signal transmission chip provided by the invention realizes the fixation of the default driving current which can be generated by the constant current driving chip without external resistor when the display module leaves the factory by storing the first parameter, and on the basis, the controller can directly control the constant current driving chip without external resistor to output the target driving current through the signal transmission chip based on the current gain. The technical scheme provided by the invention is suitable for the existing display screen controllers in the market, and a display screen user can also adjust the driving current of the constant current driving chip without external resistor based on the existing controllers. From another angle, the invention can be considered to be suitable for the existing use habit of the existing display screen user, namely, the use habit of the user, which is formed by using the constant current driving chip with the external resistor, is not changed, and the barrier-free use of the constant current driving chip without the external resistor by the user can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.

FIG. 1 is a schematic block diagram of a signal transmission chip of the present invention;

FIG. 2 is a schematic diagram of a signal transmission chip according to an embodiment of the invention;

FIG. 3 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 7 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 8 is a schematic diagram of a signal transmission chip according to another embodiment of the present invention;

FIG. 9 is a block diagram of a display module according to an embodiment of the present invention;

fig. 10 is a block diagram of a display screen according to an embodiment of the present invention.

Reference numerals illustrate:

10-a memory module; 20-triggering module, 201-protocol analysis sub-module, 202-power-on reset sub-module; 30-processing module, 301-control sub-module, 302-protocol processing sub-module, 303-operation sub-module, 304-judgment sub-module; 40-selection module.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

As described in the background section, the existing constant current driving chip with external resistor has default driving current when the display module leaves the factory, so the controller can adjust the default driving current of the constant current driving chip to obtain target driving current only by configuring the current GAIN. It will be appreciated that most controllers on the market have a current GAIN, and that display screen users are accustomed to configuring or selecting the current GAIN in the controller only to adjust the drive current of the constant current drive chip so that it outputs the target drive current.

However, in the prior art, the constant current driving chip without external resistor does not have the default driving current when leaving the factory, so that the controller cannot output the target driving current even if the controller sends the current GAIN to the constant current driving chip. The technical problem greatly limits the popularization of constant current driving chips without external resistors.

In view of this, the present invention proposes a signal transmission chip, referring to fig. 1, which shows a schematic block diagram of the signal transmission chip of the present invention, the signal transmission chip comprising: a storage module 10, a triggering module 20 and a processing module 30, wherein:

The memory module 10 stores a first parameter for configuring a driving current of the constant current driving chip;

the trigger module 20 is used for generating a trigger signal;

the processing module 30 is configured to process the first parameter in the memory module 10 according to the trigger signal, so as to output a second communication signal that can be identified by the constant current driving chip.

The memory module 10 for storing the first parameter of the present invention may be a non-volatile memory (NVM) having the characteristics of power failure and no loss of data stored therein, and the present invention uses the memory module 10 to store the first parameter, after any power-up, when the trigger module 20 generates a trigger signal, the processing module 30 can process the first parameter in the memory module 10 according to the trigger signal to output a second communication signal that can be recognized by the constant current driving chip. Obviously, the second communication signal output at this time is obtained by processing the first parameter, so the constant current driving chip also analyzes the first parameter or the data processed by the first parameter (such as the third parameter or the target third parameter) from the second communication signal, and thus the constant current driving chip can generate the driving current based on the first parameter or the data processed by the first parameter.

The driving current configured by the first parameter may be understood as the default driving current described above. The display screen manufacturer can determine the default driving current required to be output by the constant current driving chip without external resistor according to the actual display application requirement, then calculate the corresponding first parameter according to the default driving current, and write the first parameter into the memory module 10 of the signal transmission chip. After the display module is shipped, the first parameter is fixed, so that the default driving current which can be generated by the constant current driving chip without the external resistor is fixed based on the first parameter.

In practical application, the signal transmission chip sends the first parameter to the constant current driving chip first, and sends the current GAIN GAIN to the constant current driving chip; the current GAIN may be sent to the signal transmission chip, and the signal transmission chip calculates the first parameter and the current GAIN and sends the calculated first parameter and the calculated current GAIN to the constant current driving chip. Then, in the present invention, the processing module 30 processes the first parameter in the storage module 10, which may be a protocol conversion process, and may be understood that the first parameter is converted into a second communication signal that can be identified by the constant current driving chip and then directly sent to the constant current driving chip, so that the constant current driving chip generates a default driving current based on the first parameter, and then if the controller sends the current GAIN to the constant current driving chip through the signal transmission chip, the controller may implement adjustment of the default driving current in the constant current driving chip, so as to output a target driving current; alternatively, the processing of the first parameter in the memory module 10 by the processing module 30 may be processing such as operation+protocol conversion, that is, the processing module 30 calculates the current GAIN and the first parameter and then converts the current GAIN and the first parameter into the second communication signal that can be recognized by the constant current driving chip, where the constant current driving chip can directly generate the target driving current based on the parameter (the third parameter or the target third parameter) in the second communication signal.

Therefore, based on the first parameter stored and processed by the signal transmission chip provided by the invention, the configuration of the default driving current of the constant current driving chip without the external resistor is realized, and on the basis, the controller can directly adjust the target driving current of the constant current driving chip based on the default driving current and the current GAIN GAIN. The technical scheme provided by the invention is suitable for the existing display screen controllers in the market, and a display screen user can realize the adjustment of the driving current of the constant current driving chip without the external resistor based on the existing controllers. From another angle, the invention can be considered to be suitable for the existing use habit of the existing display screen user, namely, the use habit of the user, which is formed by using the constant current driving chip with the external resistor, is not changed, and the barrier-free use of the constant current driving chip without the external resistor by the user can be realized.

In the invention, corresponding to a configurable circuit in the existing constant current driving chip without external resistor, after the first parameter or data (such as the third parameter or the target third parameter) of the first parameter after operation processing is sent to the constant current driving chip, circuit parameters such as current, resistor or voltage in the constant current driving chip can be regulated, and finally the purpose that the constant current driving chip without external resistor can generate driving current with default driving current as defined herein based on the first parameter or the constant current driving chip without external resistor can generate target driving current as described herein based on the data of the first parameter after operation processing is achieved. For example, the first parameter may be used to control a mirror ratio of a current mirror in the constant current drive chip to adjust a minimum unit current Iunit in the constant current drive chip without the external resistor, so that the constant current drive chip can generate a default drive current based on the first parameter.

The specific circuit of the constant current driving chip without external resistor can refer to the related prior art, and the invention is not limited herein. The expression form of the first parameter in the memory module 10, the circuit parameter in the constant current driving chip specifically adjusted by the first parameter, and the like can be set based on the circuit structure of the constant current driving chip, and the invention is not limited herein, and can realize that the constant current driving chip generates default driving current based on the first parameter.

Alternatively, the trigger signal of the present invention may be generated based on an external signal received by the signal transmission chip. In an embodiment of the present invention, as shown in fig. 2, the trigger module 20 includes a protocol parsing sub-module 201; the protocol analysis sub-module 201 is configured to analyze the first communication signal received by the signal transmission chip and generate a trigger signal.

Further, the protocol parsing sub-module 201 may generate the trigger signal based on some implementations:

in an implementation, the protocol parsing sub-module 201 further includes a parsing unit (not shown) and a counting unit (not shown); the analysis unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the counting unit to count when the first communication signal is a target signal; the counting unit generates a trigger signal when the count of the target signal exceeds a first preset threshold. In this implementation, the counting unit may be connected to the processing module 30, and the counting unit transmits a default level signal to the processing module 30, and when the count exceeds a first preset threshold, the default level signal is flipped as the trigger signal. The counting unit may be implemented in an actual circuit by using a counter or a digital circuit with a counting function, and the circuit structure thereof belongs to a conventional technology in the art, and is not limited herein.

In another implementation, the protocol parsing sub-module 201 further includes a parsing unit (not shown) and a timing unit (not shown); the analysis unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the timing unit to start timing when the first communication signal is a target signal; the timing unit is used for generating a trigger signal after timing the first preset time length. In this implementation, the timing unit may be connected to the processing module 30, where the timing unit transmits a default level signal to the processing module 30, and after timing for a first preset period of time, the default level signal is flipped as the trigger signal. The present invention is not limited herein with respect to the circuit configuration of the timing unit, and belongs to the conventional art.

In yet another implementation, the trigger signal is generated when the protocol parsing sub-module 201 determines that the first communication signal is an instruction to send a first parameter or an instruction to send a subsequent third parameter or an instruction to send a target third parameter. In this embodiment, the protocol parsing sub-module 201 may also be understood as the aforementioned parsing unit, which is connected to the processing module 30, so as to transmit the trigger signal to the processing module 30. The analysis unit analyzes the first communication signal through the configured communication protocol rule to obtain data or instructions and the like carried in the first communication signal, the analysis is usually realized by adopting a digital circuit, protocol analysis belongs to a conventional technical means in the field, and specific circuits of different analysis units can be different based on different communication protocol rules. For example, when the signal transmission chip is a Buffer chip, the parsing unit may obtain a corresponding instruction (such as an instruction indicating to send the first parameter) or data (such as the second parameter of the present invention) by parsing the first communication signals LE, CLK and SDI.

In the various embodiments of the present invention, the signal received by the signal transmission chip is named as a first communication signal, and the signal outputted by the signal transmission chip after processing the first parameter in the memory module 10 and capable of being recognized by the constant current driving chip is named as a second communication signal. Preferably, the communication protocols of the first communication signal and the second communication signal are the same.

Alternatively, the trigger signal of the present invention may be generated based on an internal signal of the signal transmission chip. In another embodiment of the present invention, as shown in FIG. 3, the trigger module 20 includes a power-on reset sub-module 202; the power-on reset submodule 202 is used for generating a trigger signal directly or after time delay after the signal transmission chip is powered on. The present embodiment is not limited herein with respect to the duration of the power-on-reset submodule 202 delay.

As described above, in the present invention, the processing module 30 may perform processing on the first parameter in the storage module 10 only by one protocol conversion process, or may perform processing such as operation+protocol conversion, and thus, the processing module 30 of the present invention may be implemented in different manners, and some embodiments will be exemplified below.

In an embodiment of the present invention, as shown in fig. 4, the processing module 30 includes a control sub-module 301 and a protocol processing sub-module 302; the control sub-module 301 is configured to control the first parameter read out from the memory module 10 according to the trigger signal; the protocol processing sub-module 302 is configured to convert the read first parameter into a second communication signal that can be recognized by the constant current driving chip, and output the second communication signal. Because the second communication signal output to the constant current driving chip in the embodiment of the invention is directly converted from the first parameter, the constant current driving chip can obtain the first parameter by analyzing the second communication signal and generate the default driving current based on the first parameter. At this time, if the user sends the current GAIN to the constant current driving chip through the controller, the default driving current in the constant current driving chip can be adjusted, and the target driving current is obtained.

In practical applications, the control submodule 301 may be combined with any embodiment of the processing module 30 to obtain the trigger signal, so as to implement an embodiment of the present invention. In an embodiment of the present invention, the protocol processing sub-module 302 may be directly connected to the memory module 10 or directly connected to the control sub-module 301, so that the protocol processing sub-module 302 can receive the first parameter read out from the memory module 10. The process by which the protocol processing sub-module 301 converts or encapsulates parameters in one chip to be recognizable by a different chip is referred to as protocol processing, which may also be referred to as protocol conversion or protocol generation. This protocol processing technique is a conventional technical means in the art, and is typically implemented by using digital circuits, and the actual circuit may be different based on different chip applications, which is not limited in this invention.

In yet another embodiment of the present invention, as shown in fig. 5, the trigger signal includes a first trigger signal; the processing module 30 includes a control sub-module 301, an operator sub-module 303, and a protocol processing sub-module 302; the control sub-module 301 is configured to control the first parameter read out from the memory module 10 according to the first trigger signal; the operation submodule 303 is configured to operate the read first parameter and the second parameter to generate a third parameter; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the protocol processing sub-module 302 is configured to convert the third parameter into a second communication signal that can be recognized by the constant current driving chip, and output the second communication signal. In this embodiment, since the second parameter is also a parameter capable of adjusting the driving current of the constant current driving chip, the operator module 303 can perform logic operation on the first parameter and the second parameter to obtain a third parameter, the third parameter is converted into a second communication signal capable of being identified by the constant current driving chip and then sent to the constant current driving chip, and the constant current driving chip can obtain the third parameter by analyzing the second communication signal and generate the driving current based on the third parameter. Under the circuit logic, when the second parameter is the current GAIN sent by the user through the controller, the operation submodule 303 operates the current GAIN and the first parameter to serve as the third parameter of the embodiment of the invention, and the target driving current of the constant current driving chip can be adjusted in one step.

The specific circuit of the operator module 303 is not limited herein, and those skilled in the art can determine the calculation logic between the first parameter and the second parameter according to the actual adjustable circuit of the constant current driving chip based on the inventive concept, and design the specific operation mode of the operator module 303 based on the calculation logic, such as addition, subtraction, multiplication, division, and compound operation. The third parameter is, for example, equal to the product of the first parameter and the second parameter. In an alternative manner, the protocol analysis module (such as the aforementioned protocol analysis sub-module 201) of the signal transmission chip analyzes the first communication signal received by the signal transmission chip, and when determining that the first communication signal carries the second parameter, the second parameter is transmitted to the operation sub-module 303.

For example, the display screen manufacturer writes a first parameter for configuring the constant current driving chip to output a default driving current of 5mA into the memory module 10 in the signal transmission chip in advance. The current GAIN range configurable by the current controller in the market is 10% -200%, a user can send corresponding current GAIN GAIN (usually 100%) to the signal transmission chip according to the display requirement (such as brightness requirement) of the current controller on the display screen, the protocol analysis sub-module 201 in the signal transmission chip transmits the received current GAIN GAIN to the control sub-module 301, the control sub-module 301 receives the current GAIN GAIN as a first trigger signal, reads out a first parameter from the storage module 10, then transmits the first parameter and the current GAIN GAIN to the operation sub-module 303, the operation sub-module 303 calculates the first parameter and the current GAIN GAIN and then outputs a third parameter, the third parameter is processed by the protocol processing sub-module 302 and then is transmitted to the constant current driving chip in the form of a second communication signal, and the constant current driving chip obtains the third parameter by analyzing the second communication signal and outputs a target driving current based on the third parameter. It can be seen that, in this example, the current gain range configurable by the corresponding controller is 10% -200%, the constant current driving chip can output the target driving current varying in the range of 0.5 ma-10 ma, and for the user, the brightness can be adjusted by 10% -200% under the display effect configured by the display screen manufacturer.

In practical applications, the control submodule 301 may be combined with any embodiment of the processing module 30 to obtain the trigger signal, so as to implement an embodiment of the present invention. In an embodiment of the present invention, the operator module 303 may be directly connected to the storage module 10 or directly connected to the control submodule 301, so that the operator module 303 can receive the first parameter read from the storage module 10, and further, it may be realized that the third parameter generated by the operator module 303 can be written into the storage module 10.

In the embodiment of the present invention, the output of the third parameter to the outside of the signal transmission chip may have various implementation manners:

in one implementation, as shown in fig. 5, the operator module 303 is directly connected to the protocol processing sub-module 302, so that the third parameter is directly output to the outside of the signal transmission chip after being processed by the protocol processing sub-module 302 after being generated.

In another implementation, the trigger signal further includes a second trigger signal; the control sub-module 301 is further configured to store the third parameter generated by the operation sub-module 303, and control the stored third parameter to be transmitted to the protocol processing sub-module 302 according to the second trigger signal, so as to be output to the outside of the signal transmission chip after being processed by the protocol processing sub-module 302.

In this embodiment, since the second trigger signal is also generated by the trigger module 20, the second trigger signal may be implemented based on any trigger mode of the present invention. When the triggering module 20 includes the foregoing timing unit or counting unit, the first preset duration counted by the timing unit or the preset threshold counted by the counting unit should be different when the first triggering signal and the second triggering signal are generated. In other words, the first preset duration shown in the present invention is only used for distinguishing from the second preset duration described later, and should not be interpreted as a delay duration corresponding to the first trigger signal or a delay duration corresponding to the second trigger signal. In practice, in the case where the triggering module 20 includes a timing unit for generating the second triggering signal, the timing unit may also be connected to the control sub-module 301, so that the control sub-module 301 controls the timing unit to start timing when storing the third parameter generated by the operation sub-module 303, thereby generating the second triggering signal. Of course, the second trigger signal may be generated based on other embodiments, which are not limited herein.

In this embodiment, the memory for storing the third parameter may be a memory (not shown) different from the memory for storing the first parameter, and preferably may be a memory that is easily erasable, such as a register.

In yet another embodiment of the present invention, as shown in fig. 6, the storage module 10 further stores a third parameter range; the trigger signal comprises a first trigger signal; the processing module 30 includes a control sub-module 301, an operation sub-module 303, a judgment sub-module 304, and a protocol processing sub-module 302; the control sub-module 301 is configured to control the first parameter read out from the memory module 10 according to the first trigger signal; the operation submodule 303 is configured to operate the read first parameter and the second parameter to generate a third parameter; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the judging sub-module 304 judges the third parameter based on the third parameter range in the storage module 10, and outputs a target third parameter based on the judging result; the protocol processing sub-module 302 is configured to convert the target third parameter into a second communication signal that can be recognized by the constant current driving chip, and output the second communication signal. Under the circuit logic, when the second parameter is the current GAIN sent by the user through the controller, the operation submodule 303 operates the current GAIN and the first parameter to be used as a third parameter in the embodiment of the present invention, the judging submodule 304 is used to judge whether the third parameter output by the operation submodule 303 is within the third parameter range, the protocol processing submodule 302 outputs a second communication signal obtained by converting the target third parameter to the constant current driving chip, the constant current driving chip analyzes the second communication signal to obtain the target third parameter and generate driving current, and the generated driving current can effectively limit the influence of the random adjustment operation of the user on the display screen and the constant current driving chip, thereby ensuring the display effect and reducing the power consumption of the constant current driving chip.

In this embodiment, reference is made to the foregoing for a specific circuit description of the operator module 303 and a manner in which the operator module 303 obtains the second parameter, which are not repeated herein. One input end of the judging sub-module 304 may be connected to the storage module 10 or the control sub-module 301, so as to receive the third parameter range, the other input end is directly or indirectly connected to the operating sub-module 303, so as to receive the third parameter, and the output end is connected to the protocol processing sub-module 302.

Optionally, the third parameter is Z, and the third parameter range is Z [0:X ]; if the judgment result is that Z [0] < Z [ X ], the judgment sub-module 304 outputs Z as a target third parameter; if the judgment result is Z < Z0, the judgment sub-module 304 outputs Z0 as a target third parameter; if the determination result is Z [ X ] < Z, the determination sub-module 304 outputs Z [ X ] as the target third parameter.

In the embodiment of the present invention, the output of the target third parameter to the outside of the signal transmission chip may have various implementation manners:

in one implementation, the determining sub-module 304 is directly connected to the protocol processing sub-module 302, and the target third parameter is directly output to the outside of the signal transmission chip after being processed by the protocol processing sub-module 302 after being generated.

In another implementation, the trigger signal further includes a second trigger signal; the control sub-module 301 is further configured to store the target third parameter output by the judging sub-module 304, and control the stored target third parameter to be transmitted to the protocol processing sub-module 302 according to the second trigger signal, so as to be processed by the protocol processing sub-module 302 and output to the outside of the signal transmission chip. In this implementation, reference is made to the foregoing for the second trigger signal and the related explanation for storing the third parameter of the target, which are not repeated here.

In yet another embodiment of the present invention, referring to fig. 7, the storage module 10 further stores a second parameter range; the trigger signal comprises a first trigger signal; the processing module 30 includes a control sub-module 301, a judgment sub-module 304, an operation sub-module 303, and a protocol processing sub-module 302; the control sub-module 301 is configured to control the first parameter read out from the memory module 10 according to the first trigger signal; the judging sub-module 304 judges the second parameter based on the second parameter range in the storage module 10, and outputs a target second parameter based on the judging result; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip; the operator module 303 is configured to perform an operation on the read first parameter and the target second parameter to generate a third parameter; the protocol processing sub-module 302 is configured to convert the third parameter into a second communication signal that can be recognized by the constant current driving chip, and output the second communication signal. Similarly, based on the embodiment, the constant current driving chip generates driving current according to the third parameter, so that the influence of the operation of a user on the display screen and the constant current driving chip can be effectively controlled, the display effect is ensured, and the power consumption of the constant current driving chip is reduced.

In this embodiment, an input end of the judging sub-module 304 may be connected to the storage module 10 or the control sub-module 301, so as to receive and obtain the second parameter range, another input end is used for receiving the second parameter, and an output end is connected to the operating sub-module 303. In this embodiment, reference is made to the foregoing for a specific circuit description of the operator module 303 and a manner in which the operator module 303 obtains the second parameter, which are not repeated herein.

According to the embodiment of the invention, the second parameter is G, and the second parameter range is G0:X; if the judgment result is G0 < G X, the judgment sub-module 304 outputs G as a target second parameter; if the judgment result is G < G0, the judgment sub-module 304 outputs G0 as a target second parameter; if the determination result is GX < G, the determination sub-module 304 outputs GX as the target second parameter.

Similarly, the third parameter may be output after being generated according to any of the foregoing manners, which is not described herein.

In practice, the data line between the controller and the constant current driving chip is not necessarily directly connected, and in order to ensure signal integrity, a Buffer chip is added at a longer place of the connection line to increase driving capability and ensure timing matching. The existing Buffer chip is characterized in that an input signal can be directly output after passing through the Buffer, so that the signal transmission chip can be obtained by reforming the Buffer chip in the prior art. In an embodiment of the present invention, as shown in fig. 8, a schematic structural diagram of an embodiment of a signal transmission chip obtained based on Buffer chip modification of the present invention is shown, where the signal transmission chip further includes a selection module 40; the selection module 40 selects the first communication signal received by the signal transmission chip or the second communication signal transmitted by the processing module 30 to be output based on the strobe signal. Based on the setting of the selection module 40 in this embodiment, the existing communication mode between the Buffer chip and the constant current driving chip is reserved, and the configuration of the driving current of the constant current driving chip can be realized with low cost.

Corresponding to the different implementations of the processing module 30, the selecting module 40 may be applied to any of the embodiments of fig. 4 to 7, and one input end of the selecting module 40 may be connected to the input end of the signal transmission chip or the protocol parsing sub-module 201, and the other input end is connected to the output end of the protocol processing sub-module 302.

If the selection module 40 is applied to the foregoing embodiment of fig. 4, the selection module 40 actually selects to output the signal received by the signal transmission chip (i.e. the first communication signal) directly to the outside of the signal transmission chip or selects to output the first parameter (which is expressed as the second communication signal in the actual transmission) to the outside of the signal transmission chip. In this embodiment, the strobe signal may be generated by the control sub-module 301, for example, the control sub-module 301 sends the strobe signal to the selection module 40 when reading out the first parameter in the memory module 10, so that the selection module 40 outputs the second communication signal output by the protocol processing sub-module 302; the strobe signal may also be generated by the protocol processing sub-module 302; alternatively, the strobe signal may be generated by the trigger module 20, such as the aforementioned protocol parsing sub-module 201, which is not limited in particular to the implementation of the present invention.

If the selection module 40 is applied to the embodiment shown in fig. 5 or fig. 7, the selection module 40 actually selects to output the signal received by the signal transmission chip (i.e. the first communication signal) directly to the outside of the signal transmission chip or selects to output the third parameter (which is actually expressed as the second communication signal) to the outside of the signal transmission chip. In this embodiment, the strobe signal may be generated by the control sub-module 301, the trigger module 20, or by the protocol processing sub-module 302, etc., which is not limited to the specific implementation of the present invention.

If the selection module 40 is applied to the embodiment shown in fig. 6, the selection module 40 actually selects to output the signal received by the signal transmission chip (i.e. the first communication signal) directly to the outside of the signal transmission chip or selects to output the target third parameter (which is expressed as the second communication signal in the actual transmission) to the outside of the signal transmission chip.

Optionally, according to an embodiment of the present invention, a signal booster is disposed between the output end of the selection module 40 and the output end of the signal transmission chip. Through the arrangement of the signal enhancer, the signal passing through the signal transmission chip can be enhanced, and the anti-interference capability is improved. The signal enhancer may be implemented by a Buffer.

In addition, reducing unnecessary power consumption of the LED display screen is one of the targets pursued in the art. Aiming at the aim, the signal transmission chip also has the function of controlling the constant current driving chip to reduce unnecessary energy consumption:

in an embodiment of the present invention, when the signal transmission chip does not receive the display data for transmitting to the constant current driving chip within the second preset time period, the processing module 30 is further configured to output a preconfigured energy saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

In yet another embodiment of the present invention, when the display data received by the signal transmission chip for being transmitted to the constant current driving chip is all 0, the processing module 30 is further configured to output a pre-configured energy saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

In various embodiments of the present invention, the display data may be understood as gray scale data in the art, which may also include corresponding display control signals. After receiving the display data, the constant current driving chip generates a PWM (Pulse Width Modulation ) signal based on the display data to control the duration of the driving current output to the lamp beads.

The signal transmission chip is arranged on the transmission link between the display data transmitting end (such as the controller) and the constant current driving chip, and the signal transmission chip is used for judging whether the display data transmitted to the constant current driving chip is not received or whether the received display data is all 0, so that whether the constant current driving chip is controlled to save energy is determined, and unnecessary energy consumption of the constant current driving chip can be effectively reduced. In the two embodiments, compared with the mode of judging whether the constant current driving chip receives display data or whether the received display data is 0 to enter an energy-saving mode or not by using the constant current driving chip, the invention uses the signal transmission chip to control whether the constant current driving chip saves energy or not, and can control the constant current driving chip to save energy more quickly; in the full-color LED display screen, the signal transmission chip is connected with the constant current driving chips, and can control the constant current driving chips to enter an energy-saving mode in batches; meanwhile, compared with the mode that a display data detection function is arranged in the constant current driving chip (namely, whether display data are not received or whether the received display data are all 0 is identified), the display data detection function is completed in the signal transmission chip, the area of the constant current driving chip can be saved, and the manufacturing cost of the display screen is reduced as a whole.

For specific circuits, the signal transmission chip further includes an instruction configuration module (not shown), which can be implemented based on the following circuit structure: the protocol analysis sub-module 201 is configured to analyze the first communication signal received by the signal transmission chip, and perform timing at the same time, and directly or indirectly output a signal to the instruction configuration module when the display data for transmission to the constant current driving chip is not received or the display data for transmission to the constant current driving chip is received to be 0 within a second preset duration, so that the instruction configuration module outputs a pre-configured energy-saving instruction to the constant current driving chip through the protocol processing sub-module 302.

The protocol analysis submodule 201 may be implemented in a similar manner to the constant current driving chip for determining whether the received display data is received or whether the received display data is all 0, which is not limited herein.

In this embodiment, the energy-saving instruction is used to control the constant current driving chip to save energy, and a specific energy-saving mode may be to control the constant current driving chip to turn off the power supply, or may be to control all or part of the circuits of the constant current driving chip to enter a low power consumption mode.

The function of controlling the constant current driving chip to save energy for the signal transmission chip is suitable for the constant current driving chip with external resistor and the constant current driving chip without external resistor, in other words, the constant current driving chip receiving the energy saving instruction can be the constant current driving chip with external resistor or the constant current driving chip without external resistor.

For the signal transmission chip capable of controlling the constant current driving chip to save energy, the signal transmission chip can be a chip obtained by improving the existing Buffer chip, or can be a signal transmission chip capable of at least realizing the configuration of the default driving current of the constant current driving chip without external resistor as disclosed in any embodiment of the invention.

Based on the same inventive concept, referring to fig. 9, the embodiment of the invention also discloses a display module, which comprises a constant current driving chip and a signal transmission chip according to the embodiment of the invention, wherein the signal transmission chip is directly or indirectly connected with the constant current driving chip.

In this embodiment, the signal transmission chip and the constant current driving chip are disposed on the display module, so that the display screen manufacturer writes the first parameter into the memory module 10 of the signal transmission chip, the first parameter is fixed after the display module leaves the factory, and then the default driving current which can be generated by the constant current driving chip without external resistor is fixed. When receiving the trigger signal, the processing module in the signal transmission chip can transmit the first parameter stored in the processing module or the data (such as the third parameter or the target third parameter) after the first parameter is processed and calculated to the constant current driving chip in the form of a second communication signal which can be identified by the constant current driving chip, so that the constant current driving chip generates default driving current or target driving current. The signal transmission chip provided by the invention stores and processes the first parameter, so that the configuration of the default driving current of the constant current driving chip without the external resistor is realized, and on the basis, the controller can directly control the constant current driving chip without the external resistor to output the target driving current based on the current gain. The technical scheme provided by the invention is suitable for the existing display screen controllers in the market, and a display screen user can realize the adjustment of the driving current of the constant current driving chip without external resistor on the display module based on the existing controllers. From another angle, the invention can be considered to be suitable for the existing use habit of the existing display screen user, namely, the use habit of the user, which is formed by using the constant current driving chip with the external resistor, is not changed, and the barrier-free use of the constant current driving chip without the external resistor by the user can be realized.

In the invention, the direct or indirect connection of the signal transmission chip and the constant current driving chip means that the output end of the signal transmission chip and the constant current driving chip can be directly connected, or can be indirectly connected through basic electronic elements such as resistors which do not influence the change of signals, parameters or data, and the specific connection mode is not limited by the invention.

Based on the same inventive concept, referring to fig. 10, the embodiment of the invention also discloses a display screen, which comprises a controller and the display module according to the embodiment of the invention, wherein the controller is connected with the constant current driving chip through the signal transmission chip.

The technical scheme provided by the invention is suitable for the existing display screen controllers in the market, and a display screen user can also adjust the driving current of the constant current driving chip without external resistor based on the existing controllers. From another angle, the invention can be considered to be suitable for the existing use habit of the existing display screen user, namely, the use habit of the user, which is formed by using the constant current driving chip with the external resistor, is not changed, and the barrier-free use of the constant current driving chip without the external resistor by the user can be realized.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. It is also worth noting that references in this specification to "first", "second" are merely differences between different objects, which do not have a sequential or ordinal meaning.

The invention discloses a signal transmission chip, a display module and a display screen, and particularly relates to the technical field of LED display screens. From another angle, the invention can be considered to be suitable for the existing use habit of the existing display screen user, namely, the use habit of the user, which is formed by using the constant current driving chip with the external resistor, is not changed, and the barrier-free use of the constant current driving chip without the external resistor by the user can be realized.

While the foregoing has been presented in a specific form to illustrate the principles and embodiments of the invention, it will be appreciated by those skilled in the art that the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but may be construed as limited to the embodiments set forth herein.

Claims

1. A signal transmission chip, comprising: the device comprises a triggering module, a storage module and a processing module;

the trigger module is used for generating a trigger signal;

2. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the triggering module comprises a protocol analysis sub-module;

the protocol analysis sub-module is used for analyzing the first communication signal received by the signal transmission chip and generating the trigger signal.

3. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the triggering module comprises a power-on reset sub-module;

the power-on reset submodule is used for generating the trigger signal directly or after time delay after the signal transmission chip is powered on.

4. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the processing module comprises a control sub-module and a protocol processing sub-module;

the control submodule is used for controlling the first parameter in the storage module to be read out according to the trigger signal;

The protocol processing sub-module is used for converting the read first parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

5. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the trigger signal comprises a first trigger signal;

the processing module comprises a control sub-module, an operation sub-module and a protocol processing sub-module;

the control submodule is used for controlling first parameter reading in the storage module according to the first trigger signal;

the operation submodule is used for operating the read first parameter and the second parameter to generate a third parameter; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip;

the protocol processing sub-module is used for converting the third parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

6. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the storage module also stores a third parameter range; the trigger signal comprises a first trigger signal;

The processing module comprises a control sub-module, an operation sub-module, a judgment sub-module and a protocol processing sub-module;

the judging submodule judges the third parameter based on the third parameter range in the storage module and outputs a target third parameter based on a judging result;

the protocol processing sub-module is used for converting the target third parameter into a second communication signal which can be identified by the constant current driving chip and outputting the second communication signal.

7. The signal transmission chip of claim 6, wherein the signal transmission chip comprises a plurality of signal transmission chips,

wherein the third parameter is Z, and the third parameter range is Z [0:X ];

And if the judging result is Z [ X ] < Z, the judging submodule outputs Z [ X ] as a target third parameter.

8. The signal transmission chip of claim 1, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the storage module also stores a second parameter range; the trigger signal comprises a first trigger signal;

the processing module comprises a control sub-module, a judging sub-module, an operating sub-module and a protocol processing sub-module;

the judging submodule judges the second parameter based on the second parameter range in the storage module and outputs a target second parameter based on a judging result; the second parameter is a data signal which is received by the signal transmission chip and can adjust the driving current of the constant current driving chip;

the operation submodule is used for operating the read first parameter and the target second parameter to generate a third parameter;

9. The signal transmission chip of claim 8, wherein the signal transmission chip comprises a plurality of signal transmission chips,

wherein the second parameter is G, and the second parameter range is G0:X;

and if the judging result is that G [ X ] is less than G, the judging sub-module outputs G [ X ] as a target second parameter.

10. The signal transmission chip according to any one of claims 1 to 9, wherein,

the signal transmission chip further comprises a selection module;

the selection module selects and outputs the first communication signal received by the signal transmission chip or the second communication signal transmitted by the processing module based on the gating signal.

11. The signal transmission chip according to claim 5 or 8, wherein,

the trigger signal further comprises a second trigger signal;

the control submodule is also used for storing the third parameter generated by the operation submodule and controlling the stored third parameter to be transmitted to the protocol processing submodule according to the second trigger signal.

12. The signal transmission chip of claim 6, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the trigger signal further comprises a second trigger signal;

the control submodule is also used for storing the target third parameter output by the judging submodule and controlling the stored target third parameter to be transmitted to the protocol processing submodule according to the second trigger signal.

13. The signal transmission chip of claim 2, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the protocol analysis submodule comprises an analysis unit and a counting unit;

the analysis unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the counting unit to count when the first communication signal is a target signal;

the counting unit generates the trigger signal when the count of the target signal exceeds a preset threshold.

14. The signal transmission chip of claim 2, wherein the signal transmission chip comprises a plurality of signal transmission chips,

the protocol analysis submodule comprises an analysis unit and a timing unit;

the analyzing unit is used for analyzing the first communication signal received by the signal transmission chip and controlling the timing unit to start timing when the first communication signal is a target signal;

The timing unit is used for generating the trigger signal after timing the first preset time length.

15. The signal transmission chip according to any one of claims 1 to 9, wherein,

when the signal transmission chip does not receive the display data for transmission to the constant current driving chip within a second preset time period, the processing module is further used for outputting a preconfigured energy-saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

16. The signal transmission chip according to any one of claims 1 to 9, wherein,

when the display data received by the signal transmission chip and used for being transmitted to the constant current driving chip is all 0, the processing module is also used for outputting a pre-configured energy-saving instruction; the energy-saving instruction is used for controlling the constant current driving chip to save energy.

17. The signal transmission chip of claim 10, wherein a signal booster is disposed between the output of the selection module and the output of the signal transmission chip.

18. A display module comprising a constant current drive chip and a signal transmission chip as claimed in any one of claims 1 to 17, wherein the signal transmission chip is directly or indirectly connected to the constant current drive chip.

19. A display screen, characterized by comprising a controller and the display module set according to claim 18, wherein the controller is connected with the constant current driving chip through the signal transmission chip.