CN116580669B - Display module assembly and LED display screen - Google Patents
Display module assembly and LED display screenInfo
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- CN116580669B CN116580669B CN202310590502.3A CN202310590502A CN116580669B CN 116580669 B CN116580669 B CN 116580669B CN 202310590502 A CN202310590502 A CN 202310590502A CN 116580669 B CN116580669 B CN 116580669B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0693—Calibration of display systems
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
本发明公开了一种显示模组和LED显示屏，涉及显示屏技术领域，该显示模组包括：信号驱动芯片和多组显示驱动芯片，多组显示驱动芯片与显示模组上的灯珠颜色具有一一对应关系，每组显示驱动芯片用于驱动其对应颜色的灯珠点亮；信号驱动芯片存储有多组显示驱动芯片各自的基础参数，其中，每组显示驱动芯片的基础参数用于配置该组显示驱动芯片的驱动电流；信号驱动芯片用于根据接收到的触发信号或其内产生的触发信号，对每组显示驱动芯片的基础参数进行处理，以向各组显示驱动芯片输出其对应的第一通信信号，使其产生驱动电流。针对采用无外置电阻的显示驱动芯片的应用，本发明可以实现显示模组上的不同颜色灯珠的驱动电流比例固定。
This invention discloses a display module and an LED display screen, relating to the field of display technology. The display module includes a signal driver chip and multiple sets of display driver chips. Each set of display driver chips has a one-to-one correspondence with the color of the LEDs on the display module, and each set of display driver chips drives the LEDs of its corresponding color to illuminate. The signal driver chip stores basic parameters for each set of display driver chips, wherein the basic parameters of each set of display driver chips are used to configure the drive current of that set of display driver chips. The signal driver chip processes the basic parameters of each set of display driver chips according to a received trigger signal or a trigger signal generated internally, to output a corresponding first communication signal to each set of display driver chips, thereby generating a drive current. For applications using display driver chips without external resistors, this invention can achieve a fixed ratio of drive current for different colored LEDs on the display module.
Description
Technical Field
The invention relates to the technical field of display screens, in particular to a display module and an LED display screen.
Background
The display area of the full-color LED display screen is formed by splicing a plurality of pixel points containing LED lamp beads with different colors, and the brightness, the wavelength and the like of the LED lamp beads with each color determine the display effects of the brightness, the white balance, the chromaticity and the like of the whole LED display screen. A complete LED display typically includes a display module, a controller, and other components, where a display driver chip is provided on the display module, and the display driver chip can generate a stable driving current to light the lamp beads on the display module. In different display environments, the driving current of the display driving chip needs to be adjusted by a controller.
At present, each pixel point in an LED display screen is generally composed of red, green and blue LED lamp beads, the color types of the lamp beads in the corresponding pixel points are also multiple groups of display driving chips, and each group of display driving chips is used for driving the corresponding color lamp beads to light in the row scanning process. By individually adjusting the drive current of each group of display drive chips, the brightness of the corresponding color lamp beads can be changed.
Generally, before the display module is shipped out of the factory, the manufacturer of the display screen fixes the brightness ratio of the multi-color lamp beads on the display module so as to obtain a better display effect, and the display screen is generally realized by fixing the driving current ratios of the lamp beads with different colors. For example, the driving current of the display driving chip for driving the red lamp bead to light is Ir, the driving current of the display driving chip for driving the green lamp bead to light is Ig, the driving current of the display driving chip for driving the blue lamp bead to light is Ib, and the ratio of Ir, ig and Ib is fixed, so that the brightness ratio of the red, green and blue lamp beads can be fixed.
In a specific application, the display driving chip commonly used at present 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 display 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 display driving chip is fixed.
The display screen manufacturer can determine the external resistor resistance of the display driving chips for driving the different color lamp beads to light through a relevant test process (for example, the external resistor connected with the display driving chip for driving the red lamp bead to light is REXT-r, the external resistor connected with the display driving chip for driving the green lamp bead to light is REXT-g, the external resistor connected with the display driving chip for driving the blue lamp bead to light is REXT-b), and then the external resistor with the corresponding size is welded on the display module and connected with the corresponding display driving chip through the relevant process, so that the default driving current proportion of a plurality of groups of display driving chips is fixed, and then the driving current proportion of the different color lamp beads on the display module is also fixed, so that the determination of the display effect such as white balance and the like of the display screen is realized. On the basis, the controller can directly send current gain to the display driving chip, so that the default driving current of the display driving chip is adjusted, and the display driving chip outputs target driving current.
However, with the increasing demands of integration, display driving chips that do not require external resistors have been proposed in the market, i.e., the display driving chips can still generate driving currents without the external resistors on the display module. Obviously, for the display driving chip without external resistor, the manufacturer of the display screen cannot fix the driving current proportion of a plurality of groups of display driving chips on the display module by configuring the external resistor, namely the brightness proportion of the multi-color lamp beads on the display module cannot be fixed, so that the display effect of the display module is uncontrollable after leaving the factory.
Disclosure of Invention
The embodiment of the invention provides a display module and an LED display screen, and aims to realize the fixation of the driving current proportion of lamp beads with different colors on the display module aiming at the application of a display driving chip without external resistor.
In order to solve the problems, in a first aspect, the embodiment of the invention discloses a display module, which comprises signal driving chips and a plurality of groups of display driving chips, wherein the groups of display driving chips have a one-to-one correspondence with the colors of lamp beads on the display module, each group of display driving chips is used for driving the lamp beads with the corresponding colors to be lightened, the signal driving chips store respective basic parameters of the groups of display driving chips, the basic parameters of each group of display driving chips are used for configuring the driving current of the group of display driving chips, the signal driving chips are used for processing the basic parameters of each group of display driving chips according to received trigger signals or trigger signals generated in the received trigger signals so as to output corresponding first communication signals to each group of display driving chips, and each group of display driving chips generates driving currents based on the received first communication signals.
In an embodiment of the invention, the signal driving chip comprises a memory and a plurality of processing modules, wherein the memory is used for storing respective basic parameters of a plurality of groups of display driving chips, the plurality of processing modules have one-to-one correspondence with the plurality of groups of display driving chips, and each processing module is used for processing the basic parameters of a target group display driving chip with the correspondence relationship in the memory after receiving the trigger signal so as to output a first communication signal corresponding to the target group display driving chip.
In an embodiment of the invention, each processing module comprises a control submodule and a protocol generation submodule, wherein the control submodule is used for controlling the basic parameters of the target group display driving chip with corresponding relation in a memory to be read out according to the trigger signal, and the protocol generation submodule is used for converting the read basic parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In an embodiment of the invention, each processing module comprises a control submodule, an operation submodule and a protocol generation submodule, wherein the control submodule is used for controlling basic parameters of a target group display driving chip with a corresponding relation in a memory to be read out according to a trigger signal, the operation submodule is used for operating the read basic parameters and current gain to generate configuration parameters, the current gain is a data signal which is received by a signal driving chip and can be used for adjusting driving current of the display driving chip, and the protocol generation submodule is used for converting the configuration parameters into a first communication signal which can be identified by the target group display driving chip and outputting the first communication signal.
In an embodiment of the invention, the memory is further used for storing respective configuration parameter ranges of a plurality of groups of display driving chips, each processing module comprises a control submodule, an operation submodule, a judging submodule and a protocol generating submodule, the control submodule is used for controlling basic parameter reading of a target group display driving chip with a corresponding relation in the memory according to a trigger signal, the operation submodule is used for operating the read basic parameter and current gain to generate the configuration parameters, the current gain is a data signal which is received by the signal driving chip and can be used for adjusting driving current of the display driving chip, the judging submodule is used for judging the configuration parameters output by the operation submodule based on the configuration parameter range of the target group display driving chip stored in the memory and outputting the target configuration parameters based on a judging result, and the protocol generating submodule is used for converting the target configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In an embodiment of the invention, the memory is further used for storing a current gain range, each processing module comprises a control submodule, a judging submodule, an operating submodule and a protocol generating submodule, the control submodule is used for controlling basic parameters of a target group display driving chip with a corresponding relation in the memory to be read out according to a trigger signal, the judging submodule is used for judging the received current gain based on the current gain range and outputting target current gain based on a judging result, wherein the current gain is a data signal which is received by the signal driving chip and can be used for adjusting driving current of the display driving chip, the operating submodule is used for operating the read basic parameters and the target current gain to generate configuration parameters, and the protocol generating submodule is used for converting the configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In an embodiment of the invention, the signal driving chip further comprises a plurality of data transmission channels, and the plurality of data transmission channels and the plurality of groups of display driving chips have a one-to-one correspondence, wherein the data transmission channel corresponding to each group of display driving chips is used for pushing the corresponding first communication signals to the group of display driving chips.
In an embodiment of the invention, each data transmission channel is further provided with a selector, and the selector is used for selecting to output the corresponding first communication signal or the second communication signal received by the signal driving chip based on the gating signal.
In an embodiment of the present invention, the color of the lamp beads in the display module includes red, green and blue, and the plurality of groups of display driving chips include:
a first group of display driving chips for driving the red beads to light;
A second group of display driving chips for driving the green lamp beads to light;
and a third group of display driving chips for driving the blue lamp beads to light.
In a second aspect, an embodiment of the invention discloses an LED display screen, which comprises a controller and a display module according to the embodiment of the invention, wherein the controller is respectively connected with a plurality of groups of display driving chips through signal driving chips.
The embodiment of the invention has the following advantages:
The embodiment of the invention provides a display module, which comprises signal driving chips and a plurality of groups of display driving chips, wherein the groups of display driving chips have a one-to-one correspondence with the colors of lamp beads on the display module, each group of display driving chips is used for driving the lamp beads with the corresponding colors to be lightened, the signal driving chips store respective basic parameters of the groups of display driving chips, and the basic parameters of each group of display driving chips are used for configuring the driving current of the group of display driving chips. After the respective basic parameters of the display driving chips are written into the signal driving chips, the basic parameter proportion among the display driving chips is fixed, so that the driving current proportion of the display driving chips is also fixed, namely, the driving current proportion of the lamp beads with different colors on the display module is fixed when the display module leaves the factory, and further, the display effect of the display module after leaving the factory, such as white balance, is controllable or consistent with the display effect when leaving the factory, can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application.
FIG. 1 is a schematic diagram of a display module according to an embodiment of the invention;
FIG. 2 is a schematic block diagram of a signal driving chip according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a signal driving chip according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a signal driving chip according to another embodiment of the present invention;
FIG. 5 is a schematic diagram of a signal driving chip according to another embodiment of the present invention;
FIG. 6 is a schematic diagram of a signal driving chip according to another embodiment of the present invention;
FIG. 7 is a schematic diagram of a portion of a signal driving chip according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an LED display screen according to an embodiment of the present invention.
Reference numerals illustrate:
The display device comprises a display module, a controller, a signal driving chip, a first group of display driving chips, a second group of display driving chips and a third group of display driving chips, wherein the display module comprises a display module, a controller and a signal driving chip;
The device comprises a memory 101, a processing module 102, a selector 103, a 1021 control sub-module 1022, a protocol generation sub-module 1023, an operation sub-module 1024 and a judgment sub-module.
Detailed Description
The following description of the embodiments of the present application 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 application, but not all embodiments.
The embodiment of the invention provides a display module 100, as shown in fig. 1, wherein the display module 100 comprises a signal driving chip 10 and a plurality of groups of display driving chips, wherein the groups of display driving chips have a one-to-one correspondence with the colors of the lamp beads on the display module, and each group of display driving chips is used for driving the lamp beads with the corresponding colors to be lightened.
In the embodiment of the present invention, each group of display driver chips corresponds to one color of the light beads on the display module 100, and each group of display driver chips may include one or more cascaded display driver chips, and the display driver chips in the same group are all used to drive the light beads with the same color to light. In general application, a pixel of a display screen is composed of red, green and blue LED beads, that is, different color beads on the display module 100 include red r_led, green g_led and blue b_led, and the multiple sets of display driving chips should include a first set of display driving chips 20 for driving red beads to light, a second set of display driving chips 30 for driving green beads to light, and a third set of display driving chips 40 for driving blue beads to light. It should be noted that, in the case that each group of display driver chips is cascaded with a plurality of display driver chips, generally, a first display driver chip is connected with a corresponding data transmission channel to obtain a basic parameter, and the remaining cascaded display driver chips sequentially transmit the basic parameter.
As shown in fig. 1, in the embodiment of the present invention, the signal driving chip 10 stores respective basic parameters of a plurality of groups of display driving chips, where the basic parameters of each group of display driving chips are used to configure the driving current of the group of display driving chips, the signal driving chip 10 is used to process the basic parameters of each group of display driving chips according to the received trigger signal or the trigger signal generated therein, so as to output the corresponding first communication signals to each group of display driving chips, and each group of display driving chips generates the driving current based on the received first communication signals.
In the embodiment of the invention, the signal driving chip 10 is used for storing the respective basic parameters of a plurality of groups of display driving chips, and after any power-on, the signal driving chip 10 can process the basic parameters of each group of display driving chips according to the received trigger signal or the trigger signal generated in the trigger signal so as to output the corresponding first communication signals to each group of display driving chips. It is obvious that the first communication signals output to the display driver chips of each group are obtained by processing the basic parameters, so that each group of display driver chips also analyzes the first communication signals to obtain the basic parameters or the processed data (such as the configuration parameters or the target configuration parameters) of the basic parameters, and the display driver chips can generate the driving current based on the basic parameters or the processed data of the basic parameters.
The driving current configured by the basic parameters can be understood as the default driving current described above. The display screen manufacturer can determine the default driving current required to be output by each group of display driving chips without external resistors according to the actual display application requirement, calculate the corresponding basic parameters according to the default driving current, and store the basic parameters in the signal driving chip 10. For example, the different color beads on the display module 100 include red, green, and blue. The signal driving chip 10 stores 3 basic parameters, namely U1, U2 and U3, wherein the basic parameter U1 is used for configuring the driving current of the first group of display driving chips 20, the basic parameter U2 is used for configuring the driving current of the second group of display driving chips 30, and the basic parameter U3 is used for configuring the driving current of the third group of display driving chips 40.
After the respective basic parameters of the plurality of sets of display driver chips are written into the signal driver chip 10, the basic parameter ratio between the plurality of sets of display driver chips is fixed, so that the default driving current ratio of the plurality of sets of display driver chips is also fixed. In this case, whether the first communication signals output by the signal driving chips 10 to the respective groups of display driving chips are directly converted based on the basic parameters or are converted based on the data (such as configuration parameters or target configuration parameters) after the basic parameters are processed, the driving currents (which may be default driving currents or target driving currents) are generated by the respective groups of display driving chips based on the first communication signals received by the respective groups of display driving chips, and the driving current ratios generated by the plurality of groups of display driving chips are still consistent with the basic parameter ratios among the plurality of groups of display driving chips.
In this way, for the display application of the display driving chip without external resistor, the driving current proportion of the lamp beads with different colors on the display module can be fixed when leaving the factory through the technical scheme of the embodiment of the invention, so that the display effect of the display module 100 after leaving the factory, such as white balance, can be controlled or kept consistent with the display effect when leaving the factory.
In the embodiment of the present invention, the plurality of sets of display driving chips are connected to the signal driving chip 10 so as to receive the first communication signal or the second communication signal transmitted by the signal driving chip 10. The connection mode of each group of display driving chips and the signal driving chip 10 can be direct connection or indirect connection through components such as resistors, and the invention is not limited thereto.
The present invention is not limited herein, and the display driver chip may use a display driver chip existing in the market to generate a driving current based on the processed data of the basic parameter or the basic parameter.
In an embodiment of the present invention, referring to fig. 2, the signal driving chip 10 includes a memory 101 and a plurality of processing modules 102. The memory 101 is configured to store respective basic parameters of multiple sets of display driver chips, and the multiple processing modules 102 have a one-to-one correspondence with the multiple sets of display driver chips, where each processing module 102 is configured to process, after receiving a trigger signal, the basic parameters of a target set of display driver chips in the memory 101 that have a correspondence with the trigger signal, so as to output a first communication signal corresponding to the target set of display driver chips.
The trigger signal of an embodiment of the present invention may be received by or generated within the signal driving chip 10. In one embodiment, the signal driving chip 10 includes a protocol analysis module (not shown) for analyzing the second communication signal received by the signal driving chip 10, and generating the trigger signal when the second communication signal carries an instruction for indicating to send a basic parameter or a configuration parameter or a target configuration parameter, in another embodiment, the signal driving chip 10 includes a protocol analysis module for analyzing the second communication signal received by the signal driving chip 10 and counting certain specific second communication signals until the count exceeds a preset time threshold, and in another embodiment, the signal driving chip 10 includes a power-on reset module for generating the trigger signal directly or after a delay after the signal driving chip 10 is powered on. In practice, the trigger signal may be implemented in other ways, which the present invention is not limited to.
In the embodiment of the present invention, the memory 101 is preferably a non-volatile memory (NVM) which has the characteristics of power failure and no loss of stored data, so as to ensure that after any power-up, the signal driving chip 10 can process the basic parameters of each group of display driving chips according to the received trigger signal or the trigger signal generated therein, so as to output the corresponding first communication signals to each group of display driving chips.
In practical application, the signal driving chip may send the basic parameters to the display driving chip and send the current GAIN GAIN to the display driving chip, or the current GAIN GAIN may send the basic parameters and the current GAIN GAIN to the signal driving chip, and the signal driving chip may send the basic parameters and the current GAIN GAIN to the display driving chip after operation. Then, in the present invention, each processing module 102 processes the basic parameter may be only a protocol conversion process, which may be understood as converting the basic parameter into a first communication signal that can be recognized by the target group display driver chip having a corresponding relationship with the basic parameter, so that the target group display driver chip generates the default driving current based on the basic parameter, or may be a process including operation, protocol conversion, etc., for example, the processing module 102 performs operation on the current GAIN and the basic parameter and then converts the current GAIN and the basic parameter into a first communication signal that can be recognized by the target group display driver chip having a corresponding relationship with the basic parameter, where the target group display driver chip can generate the target driving current in one step based on parameters (such as a configuration parameter or a target configuration parameter below) in the first communication signal.
Next, some possible implementations of the processing module 102 of the present invention are illustrated.
In one embodiment of the present invention, referring to fig. 3, each processing module 102 includes a control submodule 1021 and a protocol generation submodule 1022. The control submodule 1021 is used for controlling the basic parameters of the target group display driving chip with corresponding relation in the memory 101 to be read out according to the trigger signal, and the protocol generation submodule 1022 is used for converting the read basic parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In the embodiment of the present invention, the processing of the basic parameter by the processing module 102 may be understood as only one protocol conversion process, that is, after each processing module 102 outputs the processed first communication signal to the corresponding target group display driver chip, the target group display driver chip analyzes the first communication signal to obtain the basic parameter, and then generates the default driving current based on the basic parameter. According to the embodiment of the invention, the default driving current proportion of the plurality of groups of display driving chips is fixed, and the default driving current proportion of the plurality of groups of display driving chips is consistent with the basic parameter proportion of the plurality of groups of display driving chips stored in the signal driving chip 10.
For example, the different color beads on the display module 100 include red, green, and blue. The memory 101 stores 3 basic parameters, namely U1, U2 and U3, wherein the basic parameters U1 correspond to a first group of display driving chips 20 for driving the red lamp beads to light, the first group of display driving chips 20 can analyze and obtain the basic parameters U1 from first communication signals received by the first group of display driving chips, default driving currents of the first group of display driving chips are configured by the basic parameters U1, the basic parameters U2 correspond to a second group of display driving chips 30 for driving the green lamp beads to light, the second group of display driving chips 30 can analyze and obtain the basic parameters U2 from the first communication signals received by the second group of display driving chips, default driving currents of the second group of display driving chips are configured by the basic parameters U2, the basic parameters U3 correspond to a third group of display driving chips 40 for driving the blue lamp beads to light, the third group of display driving chips 40 can analyze and obtain the basic parameters U3 from the first communication signals received by the third group of display driving chips, and default driving currents of the third group of display driving chips are configured by the basic parameters U3.
Subsequently, even if the user sends the current gain to the plurality of groups of display driving chips through the controller, since the default driving current proportion among the plurality of groups of display driving chips is fixed and the current gain received by each group of display driving chips is consistent, each group of display driving chips adjusts the target driving current obtained after the default driving current is adjusted based on the current gain, and finally the target driving current proportion of the plurality of groups of display driving chips still keeps fixed.
In another embodiment of the present invention, referring to fig. 4, each processing module 102 includes a control sub-module 1021, an operator sub-module 1023, and a protocol generation sub-module 1022. The control submodule 1021 is used for controlling the basic parameters of the target group display driving chips with corresponding relation in the memory 101 to be read out according to the trigger signals, the operation submodule 1023 is used for operating the read-out basic parameters and the current gain to generate configuration parameters, wherein the current gain is a data signal which is received by the signal driving chip 10 and can adjust the driving current of the display driving chips, and the protocol generation submodule 1022 is used for converting the configuration parameters into first communication signals which can be identified by the target group display driving chips and outputting the first communication signals.
In the present invention, the processing module 102 processes the basic parameters to be understood as an operation+protocol conversion process. That is, the processing module 102 calculates the current GAIN and the basic parameter, and then converts the calculated current GAIN and the basic parameter into a first communication signal which can be identified by the target group display driver chip having a corresponding relationship with the first communication signal, and the target group display driver chip can directly generate the target driving current based on the parameter (such as the configuration parameter or the target configuration parameter) in the first communication signal. Since the basic parameter ratios of the plurality of sets of display driving chips are fixed and the current gains for calculation are identical, the final target driving current ratio will also remain fixed, i.e., the target driving current ratios of the plurality of sets of display driving chips are identical to the basic parameter ratios of the plurality of sets of display driving chips stored in the signal driving chip 10.
In yet another embodiment of the present invention, referring to fig. 5, the memory 101 is further configured to store respective configuration parameter ranges of multiple sets of display driver chips, and each processing module 102 includes a control sub-module 1021, an operation sub-module 1023, a judgment sub-module 1024, and a protocol generation sub-module 1022. The control submodule 1021 is used for controlling basic parameters of a target group display driving chip with a corresponding relation in the memory 101 to be read out according to a trigger signal, the operation submodule 1023 is used for operating the read-out basic parameters and current gain to generate configuration parameters, wherein the current gain is a data signal which is received by the signal driving chip 10 and can adjust driving current of the display driving chip, the judging submodule 1024 is used for judging the configuration parameters output by the operation submodule 1023 based on the received configuration parameter range of the target group display driving chip and outputting target configuration parameters based on a judging result, and the protocol generating submodule 1022 is used for converting the target configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In this embodiment, the control submodule 1021 may control the readout of the configuration parameter range of the target group display driver chip having a corresponding relationship with the control submodule 1021 in the memory 101 based on the trigger signal or other signals (such as the signal generated by the operation submodule 1023), and then determine that the submodule 1024 is directly or indirectly connected with the memory 101, so as to receive the configuration parameter range of the target group display driver chip. In the embodiment, the judging submodule 1024 is used for judging whether the configuration parameters output by the operation submodule 1023 are within the configuration parameter range of the target group display driving chip, and outputting a first communication signal carrying the target configuration parameters to the target group display driving chip through the protocol processing submodule, wherein the target group display driving chip generates target driving current according to the target configuration parameters, so that the influence of the operation of a user on the display screen and the target group display driving chip can be effectively controlled, the display effect is ensured, and the power consumption of the display driving chip is reduced.
For example, for any group of display driver chips, the configuration parameter is Z, the range of the configuration parameter is Z0:X, if the determination result is Z0 < Z X, the determination submodule 1024 outputs Z as the target configuration parameter, if the determination result is Z < Z0, the determination submodule 1024 outputs Z0 as the target configuration parameter, and if the determination result is Z < X < Z, the determination submodule 1024 outputs Z X as the target configuration parameter. It should be noted that, because the basic parameters corresponding to different groups of display driving chips are different, the configuration parameter range Z [0:X ] corresponding to each group of display driving chips is also different, where the driving current ratio corresponding to the configuration parameter range of different groups should also be kept fixed, that is, the driving current ratio is consistent with the basic parameter ratio of the fixed multiple groups of display driving chips.
In yet another embodiment of the present invention, referring to FIG. 6, the memory 101 is further configured to store a current gain range, and each processing module 102 includes a control sub-module 1021, a judgment sub-module 1024, an operation sub-module 1023, and a protocol generation sub-module 1022. The control submodule 1021 is used for controlling basic parameters of a target group display driving chip with a corresponding relation in the memory 101 to be read out according to a trigger signal, the judging submodule 1024 is used for judging the received current gain based on the current gain range in the memory 101 and outputting a target current gain based on a judging result, wherein the current gain is a data signal which is received by the signal driving chip 10 and can be used for adjusting the driving current of the display driving chip, the operation submodule 1023 is used for operating the read basic parameters and the target current gain to generate configuration parameters, and the protocol generating submodule 1022 is used for converting the configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
In this embodiment, the control submodule 1021 may control the readout of the current gain range in the memory 101 based on the trigger signal or other signals (e.g., signals for generating configuration parameters by the operator submodule 1023), and then determine that the submodule 1024 is directly or indirectly connected to the memory 101, so as to receive the current gain range. In the embodiment, the judging submodule 1024 is used for judging whether the received current gain is in the current gain range stored in advance, outputting the target current gain after being judged and limited to the operating submodule 1023, generating the configuration parameter by the operating submodule 1023, outputting a first communication signal carrying the configuration parameter to the target group display driving chip by the protocol processing submodule, generating the target driving current by the target group display driving chip according to the configuration parameter, effectively controlling the influence of the operation of a user on the display screen and the target group display driving chip, ensuring the display effect and reducing the power consumption of the display driving chip.
The example is that the current gain is G and the current gain range is G0:X, if the determination is G0 < G < X >, the determination submodule 1024 outputs G as the target current gain, if the determination is G < G0, the determination submodule 1024 outputs G <0 > as the target current gain, and if the determination is G < X < G, the determination submodule 1024 outputs G < X > as the target current gain.
In this embodiment, since the current gain is used to adjust the display effect (such as brightness) of the entire display screen, the target driving currents finally output by the multiple groups of display driving chips are generated based on their respective default driving currents and the current gain, so that the target driving current ratios of the multiple groups of display driving chips after adjustment are also kept fixed, so as to ensure the display effect of the display screen such as white balance.
In various embodiments of the present invention, the present invention is not limited herein with respect to the specific circuit of the operator module 1023, and based on the present invention, those skilled in the art can determine the calculation logic between the basic parameter and the current gain or the target current gain according to the actual adjustable circuit of the display driving chip, and design the specific operation mode of the operator module 1023 based on the calculation logic.
The manner in which the signal driving chip 10 obtains the current gain is not limited herein. In an alternative manner, the protocol parsing module of the signal driving chip 10 parses the second communication signal received by the signal driving chip 10, and when determining that the second communication signal carries a current gain, transmits the current gain to the operation sub-module 1023.
The protocol generation and the protocol analysis both belong to the prior art, so the protocol generation module and the protocol analysis module can refer to the related explanation of the prior art, and the invention is not repeated.
In an embodiment of the present invention, as shown in fig. 7, the signal driving chip 10 further includes a plurality of data transmission channels, where the plurality of data transmission channels have a one-to-one correspondence with the plurality of groups of display driving chips, and the data transmission channel corresponding to each group of display driving chips is configured to push the corresponding first communication signal to the group of display driving chips.
In an embodiment of the present invention, the signal driving chip 10 may be implemented after modification of an existing Buffer chip, as shown in fig. 7, where the signal driving chip 10 includes a signal transmission channel and a plurality of data transmission channels, the signal transmission channel may include a clock signal CLK and an instruction LE, different signals may be represented based on different lengths of CLK and LE, and by performing a correlation design on the CLK length corresponding to LE, an instruction for indicating a transmission basic parameter or a configuration parameter or a target configuration parameter may be represented. The plurality of data transfer channels may include a data transfer channel SDI-R, a data transfer channel SDI-G, a data transfer channel SDI-B. Wherein, SDI-R is correspondingly connected with the first group of display driving chips 20 for driving the red light beads to light, the first communication signals obtained by converting the basic parameters U1 can be transmitted to the first group of display driving chips 20 through SDI-R, SDI-G is correspondingly connected with the second group of display driving chips 30 for driving the green light beads to light, the first communication signals obtained by converting the basic parameters U2 can be transmitted to the second group of display driving chips 30 through SDI-G, SDI-B is correspondingly connected with the third group of display driving chips 40 for driving the blue light beads to light, and the first communication signals obtained by converting the basic parameters U3 can be transmitted to the third group of display driving chips 40 through SDI-B.
The Buffer chip is known in the art as a signal through chip, and is characterized in that an input signal is directly output after passing through the Buffer, so as to enhance the driving capability. The signal driving chip 10 can adopt the idea of realizing the improved Buffer chip. In an embodiment of the present invention, with continued reference to fig. 7, each data transmission channel is further provided with a selector 103, and the selector 103 is configured to select, based on the strobe signal, outputting the first communication signal transmitted by the processing module or outputting the second communication signal received by the signal driving chip 10. As shown in FIG. 7, the selector 103 on the data transmission channel SDI-R is Mux-R, one input end of the Mux-R is connected with the channel inlet of the SDI-R, the other input end of the Mux-R is connected with the corresponding processing module 102, and the output end of the Mux-R is connected with the channel outlet of the SDI-R, the selector 103 on the data transmission channel SDI-G is Mux-G, the other input end of the Mux-G is connected with the corresponding processing module 102, and the output end of the Mux-G is connected with the channel outlet of the SDI-G, the selector 103 on the data transmission channel SDI-B is Mux-B, and the other input end of the Mux-B is connected with the corresponding processing module 102, and the output end of the Mux-B is connected with the channel outlet of the SDI-B. Based on the setting of the selector 103 in this embodiment, the existing communication mode between the Buffer chip and the display driving chip is reserved, and the configuration of the driving current of the display driving chip can be realized with low cost.
Corresponding to the different implementation manners of the processing module 102, the selector 103 may be applied to any embodiment of the processing module 102, and one input end of the selector 103 may be connected to the input end of the signal driving chip 10 or the protocol parsing module, and the other input end is connected to the output end of the protocol processing sub-module.
In various embodiments, the strobe signal may be generated by the control submodule 1021, for example, the control submodule 1021 may send the strobe signal to the selector 103 when reading the first parameter in the memory 101, so that the selector 103 outputs the first communication signal output by the protocol processing submodule, or the strobe signal may be generated by the protocol processing submodule or the protocol parsing module, etc., which is not limited in the implementation of the present invention.
Based on the same inventive concept, the embodiment of the invention also provides an LED display screen, referring to fig. 8, the LED display screen includes a controller 200 and a display module 100 according to the embodiment of the invention, where the controller 200 is respectively connected with a plurality of groups of display driving chips through a signal driving chip 10. The connection manner of the signal driving chip 10 and the multiple groups of display driving chips and the implementation principle and effect of the present invention refer to the foregoing and are not repeated herein.
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 foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present contribution to the art may be better appreciated. While various modifications of the embodiments and applications of the application will occur to those skilled in the art, it is not necessary and not intended to be exhaustive of all embodiments, and obvious modifications or variations of the application are within the scope of the application.
Claims (10)
1. A display module, comprising:
The display module comprises a signal driving chip with enhanced driving capability and a plurality of groups of display driving chips, wherein the plurality of groups of display driving chips have a one-to-one correspondence with the colors of the lamp beads on the display module, and each group of display driving chips is used for driving the lamp beads with the corresponding colors to be lightened;
the signal driving chips are in nonvolatile storage with respective basic parameters of the plurality of groups of display driving chips, wherein the basic parameters of each group of display driving chips are used for configuring the driving current of the group of display driving chips so as to fix the driving current proportion of the plurality of groups of display driving chips;
The signal driving chip is used for processing basic parameters of each group of display driving chips according to the received trigger signals or the trigger signals generated in the signal driving chip so as to output corresponding first communication signals to each group of display driving chips;
each group of display driving chips generates driving current based on the received first communication signal not based on the external resistor.
2. The display module assembly of claim 1, wherein the display module assembly comprises,
The signal driving chip comprises a memory and a plurality of processing modules;
the memory is used for storing the respective basic parameters of the multiple groups of display driving chips;
the processing modules have a one-to-one correspondence with the multiple groups of display driving chips, and each processing module is used for processing basic parameters of the target group display driving chips with the correspondence in the memory after receiving the trigger signal so as to output a first communication signal corresponding to the target group display driving chip.
3. The display module assembly of claim 2, wherein the display module assembly comprises,
Each processing module comprises a control sub-module and a protocol generation sub-module;
the control submodule is used for controlling basic parameter reading of a target group display driving chip with a corresponding relation with the target group display driving chip in the memory according to the trigger signal;
the protocol generation submodule is used for converting the read basic parameters into first communication signals which can be recognized by the target group display driving chip and outputting the first communication signals.
4. The display module assembly of claim 2, wherein the display module assembly comprises,
Each processing module comprises a control sub-module, an operation sub-module and a protocol generation sub-module;
the control submodule is used for controlling basic parameter reading of a target group display driving chip with a corresponding relation with the target group display driving chip in the memory according to the trigger signal;
the operation submodule is used for operating the read basic parameters and the current gain to generate configuration parameters, wherein the current gain is a data signal which is received by the signal driving chip and can adjust the driving current of the display driving chip;
The protocol generation sub-module is used for converting the configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
5. The display module assembly of claim 2, wherein the display module assembly comprises,
The memory is also used for storing the respective configuration parameter ranges of the multiple groups of display driving chips;
each processing module comprises a control sub-module, an operation sub-module, a judgment sub-module and a protocol generation sub-module;
the control submodule is used for controlling basic parameter reading of a target group display driving chip with a corresponding relation with the target group display driving chip in the memory according to the trigger signal;
the operation submodule is used for operating the read basic parameters and the current gain to generate configuration parameters, wherein the current gain is a data signal which is received by the signal driving chip and can adjust the driving current of the display driving chip;
The judging submodule judges the configuration parameters output by the operation submodule based on the configuration parameter range of the target group display driving chip stored in the memory, and outputs target configuration parameters based on a judging result;
The protocol generation sub-module is used for converting the target configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
6. The display module assembly of claim 2, wherein the display module assembly comprises,
Each processing module comprises a control sub-module, a judging sub-module, an operating sub-module and a protocol generating sub-module;
the control submodule is used for controlling basic parameter reading of a target group display driving chip with a corresponding relation with the target group display driving chip in the memory according to the trigger signal;
The judging submodule judges the received current gain based on the current gain range stored in the memory and outputs a target current gain based on a judging result, wherein the current gain is a data signal which is received by the signal driving chip and can adjust the driving current of the display driving chip;
the operation submodule is used for operating the read basic parameters and the target current gain to generate configuration parameters;
The protocol generation sub-module is used for converting the configuration parameters into first communication signals which can be identified by the target group display driving chip and outputting the first communication signals.
7. The display module assembly of claim 1 or 2, wherein,
The signal driving chip further comprises a plurality of data transmission channels, and the plurality of data transmission channels and the plurality of groups of display driving chips have a one-to-one correspondence;
The data transmission channels corresponding to each group of display driving chips are used for pushing the corresponding first communication signals to the group of display driving chips.
8. The display module assembly of claim 7, wherein the display module assembly,
Each data transmission channel is also provided with a selector;
The selector is used for selecting to output corresponding first communication signals or output second communication signals received by the signal driving chip based on the gating signals.
9. The display module assembly of any one of claims 1-6, wherein,
Wherein, lamp pearl colour in the display module assembly includes red, green and blue, multiunit display driver chip includes:
a first group of display driving chips for driving the red beads to light;
A second group of display driving chips for driving the green lamp beads to light;
and a third group of display driving chips for driving the blue lamp beads to light.
10. An LED display screen, comprising a controller and a display module according to any one of claims 1 to 9, wherein the controller is connected to the plurality of sets of display driver chips respectively through the signal driver chips.
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