CN111128070A - Method and system for obtaining resolution of LED dot matrix display screen - Google Patents
Method and system for obtaining resolution of LED dot matrix display screen Download PDFInfo
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- CN111128070A CN111128070A CN202010045514.4A CN202010045514A CN111128070A CN 111128070 A CN111128070 A CN 111128070A CN 202010045514 A CN202010045514 A CN 202010045514A CN 111128070 A CN111128070 A CN 111128070A
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- 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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Abstract
The invention provides a method and a system for obtaining the resolution of an LED dot matrix display screen, wherein the method comprises the following steps: the A1 controller acquires an upper computer control program and identifies a drive module as a few scans S and a folding number F; the A2 controller continuously outputs clock signals at preset frequency, detects the clock signals fed back from each drive module, and obtains the number N of the drive modules1(ii) a The a3 controller calculates the formula H = S F N1Obtaining the height resolution; a4 setting the DATA signal of each output port of the controller to low level, outputting a preset number of clock signals at a preset frequency, and clearing the DATA in the shift register of each drive chip; a5 outputs a high level of a clock width on the DATA signal at the output port of the controller, clears the clock rising edge counter at the input port of the controller, and starts counting; a6 stops counting when the controller detects the DATA signal is high level through the input port, and obtains the number N of clocks2(ii) a The A7 controller calculates formula W = N2the/F yields the width resolution.
Description
Technical Field
The invention relates to the field of LED dot matrix display screens, in particular to a method and a system capable of obtaining the resolution of an LED dot matrix display screen.
Background
Compared with other display terminals such as an LCD display screen, the LED dot matrix display screen has the characteristics that the LED dot matrix display screen can be spliced randomly to meet the requirements of different occasions, so that the resolution ratio is very random, and the LED dot matrix display screen has more configurability in use. The LED dot matrix display screen in the prior art mainly comprises an LED module and an LED controller, wherein the LED controller is used for controlling the display of the LED screen.
Because the LED module is of a great variety, and the sizes of the LED screens are different. When using an LED dot matrix display screen, the LED controllers are first configured, wherein a very important set of parameters includes the resolution of the LED screen carried by each LED controller. If the resolution configuration of the LED screen is not consistent with the resolution of the media resource that needs to be displayed actually or the preset screen size, an abnormal display may result.
Therefore, in order to solve such problems, the prior art LED dot matrix display screen needs to configure the resolution of the LED controller before being used, and the process of configuring the resolution is a necessary step. However, one problem is that in many applications, especially in the application scenarios of large-scale multi-specification LED dot matrix display screens, if the resolutions of the LED dot matrix display screens connected to each area are different, the parameters can only be manually checked and input, which is very inefficient and has a high error rate.
Disclosure of Invention
The invention mainly aims to provide a method and a system for acquiring the resolution of an LED dot matrix display screen, so that the accessed resolution of the LED dot matrix display screen is automatically identified through an LED controller.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a method for obtaining a resolution of an LED dot matrix display screen, comprising the steps of:
the A1 controller obtains an upper computer control program and identifies the number F of the driving chip arrangement folding times;
the A2 controller continuously outputs clock signals at a preset frequency, detects the clock signals fed back from each drive module and identifies the number N1 of the drive modules;
the A3 controller calculates the formula H = F N1 to obtain the height resolution;
a4 setting the DATA signal of each output port of the controller to low level, outputting a preset number of clock signals at a preset frequency, and clearing the DATA in the shift register of each drive chip;
a5 outputs a high level of a clock width on the DATA signal at the output port of the controller, clears the clock rising edge counter at the input port of the controller, and starts counting;
a6 stops counting when the controller detects that the DATA signal is high level through the input port, and obtains the number of clocks N2;
the a7 controller calculates the formula W = N2/F to yield the width resolution.
In a possible preferred embodiment, according to the first aspect of the present invention, wherein the preset frequency in step a2 is 1 MHz.
In a possible preferred embodiment, according to the first aspect of the present invention, 204800 clock signals are output at a frequency of 1MHz in step a 4.
In a possible preferred embodiment, according to the first aspect of the present invention, wherein the driver chip is a constant current driver chip of type 75HC 595.
In order to achieve the above object, according to a second aspect of the present invention, there is also provided a method for obtaining a resolution of an LED dot matrix display screen, comprising the steps of:
the A1 controller obtains a control program of an upper computer, and identifies that the driving module is a few sweeps S and the number of driving chip arrangement folding times F;
the A2 controller continuously outputs clock signals at a preset frequency, detects the clock signals fed back from each drive module and identifies the number N1 of the drive modules;
the A3 controller calculates the formula H = S F N1 to obtain the height resolution;
a4 setting the DATA signal of each output port of the controller to low level, outputting a preset number of clock signals at a preset frequency, and clearing the DATA in the shift register of each drive chip;
a5 outputs a high level of a clock width on the DATA signal at the output port of the controller, clears the clock rising edge counter at the input port of the controller, and starts counting;
a6 stops counting when the controller detects that the DATA signal is high level through the input port, and obtains the number of clocks N2;
the a7 controller calculates the formula W = N2/F to yield the width resolution.
In a possible preferred embodiment, according to the second aspect of the present invention, wherein the preset frequency in step a2 is 1 MHz.
In a possible preferred embodiment, according to the second aspect of the present invention, wherein 204800 clock signals are output at a frequency of 1MHz in step a 4.
In a possible preferred embodiment, according to the second aspect of the present invention, wherein the driver chip is a constant current driver chip of type 75HC 595.
In order to achieve the above object, according to a third aspect of the present invention, there is also provided a system for obtaining a resolution of an LED dot matrix display, comprising: the LED dot matrix display comprises a controller, an upper computer and an LED dot matrix display screen, wherein the upper computer is in data connection with the controller, the controller is in control connection with the LED dot matrix display screen, and the method for acquiring the resolution of the LED dot matrix display screen, which is disclosed in claims 1 to 8, is stored in the controller and is used for the controller to execute and calculate the resolution of the LED dot matrix display screen.
In a possible preferred embodiment, according to the third aspect of the present invention, wherein the controller comprises: the master control chip is connected with each input port and each output port, and each output port is provided with a clock rising edge counter; the main control chip is in data connection with the upper computer; this LED dot matrix display screen includes: the LED lamp is connected with the driving module in a control way; wherein, each input and output port is respectively connected with each adaptive input and output interface, so that the main control chip and the driving module form a closed control loop.
According to the method and the system for acquiring the resolution of the LED dot matrix display screen, the resolution of the LED dot matrix display screen does not need to be manually detected and configured, and the controller can automatically identify the resolution of the matched LED dot matrix display screen in a very short time. Therefore, the possibility of display problems caused by manual input errors in the production and use processes is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a system for obtaining resolution of an LED dot matrix display screen according to the present invention;
FIG. 2 is a schematic diagram of a system for obtaining resolution of an LED dot matrix display screen according to the present invention;
FIG. 3 is a schematic diagram of a system for obtaining resolution of an LED dot matrix display screen according to the present invention;
FIG. 4 is a diagram of the steps of a method for obtaining the resolution of an LED dot matrix display screen according to the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," "A1," "B1," and the like in the description and claims of the invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The present invention provides a method for obtaining a resolution of an LED dot matrix display, which is applicable to obtain the resolution of the LED dot matrix display (herein, referred to as a display) shown in fig. 1 to fig. 3 in a preferred embodiment, wherein a driving circuit of the display is shown in fig. 1, and for convenience of description in this embodiment, a driving circuit composed of a constant current driving chip of 75HC595 model is preferably used as an example for description, so those skilled in the art can know that the preferred embodiment does not limit a hardware range to which the method of the present invention is applicable, and other 16-bit constant current driving chips similar to the 75HC595 model or other constant current driving chips capable of performing the method of the present invention and obtaining a resolution detection result in the same way are all within the disclosure range of the present invention.
As for the constant current driver chip (herein, simply referred to as a driver chip) of the 75HC595 model in this embodiment, in this preferred embodiment, each driver chip is exemplified by controlling 8 columns of LED lamps, where after a plurality of driver chips are cascaded, one row of LED lamps can be controlled. In practical use, in order to save the number of driving chips, a dynamic scanning manner is usually used, i.e. one row of driving chips is usually carried with a plurality of rows of LED lamps. For example, 1/4 display screen, i.e. one row of driver chips carrying 4 rows of LED lamps. 1/16A display screen is swept, i.e., one row of driver chips carries 16 rows of LED lamps. In the present embodiment, an example including a dynamic scan structure is preferably described.
As shown in fig. 1, in the present embodiment, the input of each row driving chip is composed of CLK, DATA, LAT, and OE signals. The driver chip shifts the incoming DATA one bit every clock rising edge. If the number of the driving chips is n, each driving chip carries m columns of LED lamps. Then after m × n clock rising edges, all the LED display data in all the columns can be shifted in. At this time, LAT is used for latching, and the LED display data can be normally output. After the LED lamps in each row are arranged in the mode, the display control of the whole display screen can be completed.
In a preferred embodiment, in order to make one path of data with a higher screen, there may be a broken line discharge in the arrangement of the driving chips. As shown in fig. 2, the arrangement of the driving chips in this embodiment is 4-fold, that is, one path of data can drive 4 rows of driving chips. The number of folding lines in the arrangement process of the driver chips is denoted as F in this embodiment.
In order to better describe the implementation process of the method of the present invention, the method of this embodiment is described by taking the hardware system adapted to the fig. 3 as an example, wherein in this embodiment, the system for acquiring the resolution of the LED dot matrix display screen includes: an LED controller (herein, simply referred to as a controller) and an LED dot matrix display screen (herein, simply referred to as a display screen) adapted and controlled with the controller, as shown in fig. 3, the controller in this embodiment preferably includes: the master control chip and each path of input and output ports are provided with a clock rising edge counter; and the display screen adapted to the controller preferably comprises: the LED lamp comprises LED lamps, driving modules and input and output interfaces which are connected end to end in each driving module, wherein the driving modules are preferably formed by cascading a plurality of driving chips, and each driving chip is respectively connected with the corresponding number of LED lamps. The method for obtaining the resolution of the LED dot matrix display screen is preferably stored in the main control chip for the controller to execute, and the height and width resolution of the adaptive display screen is calculated.
Specifically, each output port of the controller is connected to a corresponding drive module of the display screen through an adaptive input interface, and the output interface of each drive module is connected to a corresponding input port of the controller to form a closed control loop.
Therefore, in order to obtain the resolution of the display screen with the hardware structure, the invention skillfully adopts the CLK and DATA signals of each group of signals in the display screen to obtain the height and width DATA of the display screen. Referring to fig. 4, the method includes the following steps:
the controller acquires an upper computer control program to identify the scanning mode of the current drive module and acquires the number F of scanning S of the drive module and the number F of the arrangement and the folding times of the drive chips. Firstly, because the scanning modes of the driving modules of the display screen are different from each other, and the scanning modes affect the calculation of the resolution of the LED, the scanning mode of the current driving module, for example, the dynamic scanning mode in this embodiment, needs to be informed to the controller through the software of the upper computer, so as to further obtain the number of scans S of the driving module and the number of folding times F of the arrangement of the driving chips.
It should be noted that programs for controlling the controller to drive the display screen to operate are stored in the upper computer, and the programs are adapted to the resolution and the scanning mode of the display screen under the plan, so that the acquisition of the several scans S and the folding times F can be realized.
And then, the height resolution and the width resolution of the display screen can be respectively calculated.
Wherein the height resolution H calculating step includes:
the A1 controller continuously outputs CLOCK signals at preset frequency through each output port; in the present embodiment, the preset frequency is preferably a clock frequency of about 1MHz, and mainly considers that the clock frequency is high, which may affect the quality of long-distance signal transmission, but those skilled in the art may also adjust the preset frequency according to the actual transmission distance and quality requirement, so the present embodiment is not limited.
The A2 controller detects the number N of the CLOCK signal acquisition driving modules fed back from each driving module through each input port1(ii) a That is, the controller obtains the CLOCK feedback data through each input port, so as to detect the validity of the CLOCK signal, if the CLOCK signal is valid. The existence of the driving module on the interface is shown, so that the number N of the driving modules in the vertical direction can be obtained1。
A3 obtains the scanning times of the drive module and the folding times F of the drive chip arrangement according to the scanning mode of the drive module, and calculates the height H = S F N of the display screen1。
In another preferred embodiment, if S is 1, that is, if the dynamic scan mode is not performed, the calculation of S may be omitted in this step.
For example, the following steps are carried out:
such as: for a 1/4 display with a sweep of S4 and a fold number of 2. If it is detectedThe number of the driving modules in the vertical direction is 3. Namely: s =4, F =2, N1=3, then: the screen height H =4 × 2 × 3=24 (pixels).
Wherein the width resolution W calculating step includes:
b1 sets the DATA signal of each output port of the controller to low level and outputs a preset number of clock signals at a preset frequency for outputting sufficient CLK to clear the DATA in the shift register of each driver chip.
Specifically, the DATA signal is set low, i.e., DATA = 0. Meanwhile, on the premise that DATA =0, 204800 clocks are output as preset, and the clock frequency may be preset to be about 1MHz, where the adoption of the clock frequency of about 1MHz mainly considers that the quality of long-distance signal transmission is affected when the clock frequency is high. The purpose of this step is to output enough CLK to clear the data in the shift registers of all driver chips.
B2 outputs a clock-wide high on the DATA signal at the output port of the controller. At the same time, the clock rising edge counter of the input port of the controller is cleared and starts counting.
B3 when the controller detects the DATA signal is high level through the input port, it stops counting and gets the number of clocks N2. And N is2I.e. the total number of LED pixels connected in series on one DATA signal.
B4 when obtaining the total number N of LED pixel points connected in series on a DATA signal2After, calculate W = N2/F
The width resolution W of the display screen in the horizontal direction can be obtained.
For example, the following steps are carried out:
for an 1/4 sweep, the number of folds is 2. If the number of the clock N is detected2Is 128. Namely: n is a radical of2=128, F =2, then: screen width W = N2/F =128/2=64 (pixels).
Therefore, the horizontal and vertical resolutions W and H of the LED dot matrix display screen can be obtained. Therefore, the resolution of the accessed LED dot matrix display screen is automatically identified through the controller.
In summary, according to the method and the system for obtaining the resolution of the LED dot matrix display screen provided by the present invention, the controller can automatically identify the resolution of the connected LED dot matrix display screen within a very short time without manual detection and manual configuration of the resolution of the LED dot matrix display screen. Therefore, the possibility of display problems caused by manual input errors in the production and use processes is greatly reduced.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof, and any modification, equivalent replacement, or improvement made within the spirit and principle of the invention should be included in the protection scope of the invention.
It will be appreciated by those skilled in the art that, in addition to implementing the system, apparatus and various modules thereof provided by the present invention in the form of pure computer readable program code, the same procedures may be implemented entirely by logically programming method steps such that the system, apparatus and various modules thereof provided by the present invention are implemented in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
In addition, all or part of the steps of the method according to the above embodiments may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. A method for obtaining the resolution of an LED dot matrix display screen comprises the following steps:
the A1 controller obtains an upper computer control program and identifies the number F of the driving chip arrangement folding times;
the A2 controller continuously outputs clock signals at preset frequency, detects the clock signals fed back from each drive module, and identifies the number N of the drive modules1；
The a3 controller calculates the formula H = F × N1Obtaining the height resolution;
a4 setting the DATA signal of each output port of the controller to low level, outputting a preset number of clock signals at a preset frequency, and clearing the DATA in the shift register of each drive chip;
a5 outputs a high level of a clock width on the DATA signal at the output port of the controller, clears the clock rising edge counter at the input port of the controller, and starts counting;
a6 stops counting when the controller detects the DATA signal is high level through the input port, and obtains the number N of clocks2；
The A7 controller calculates formula W = N2the/F yields the width resolution.
2. The method for obtaining the resolution of the LED dot matrix display screen according to claim 1, wherein the preset frequency in the step A2 is 1 MHz.
3. The method for obtaining the resolution of the LED dot matrix display screen according to claim 1, wherein 204800 clock signals are output at a frequency of 1MHz in the step A4.
4. The method for obtaining the resolution of the LED dot matrix display screen according to claim 1, wherein the driving chip is a constant current driving chip of 75HC595 type.
5. A method for obtaining the resolution of an LED dot matrix display screen comprises the following steps:
the A1 controller obtains a control program of an upper computer, and identifies that the driving module is a few sweeps S and the number of driving chip arrangement folding times F;
the A2 controller continuously outputs clock signals at preset frequency, detects the clock signals fed back from each drive module, and identifies the number N of the drive modules1；
The a3 controller calculates the formula H = S F N1Obtaining the height resolution;
a4 setting the DATA signal of each output port of the controller to low level, outputting a preset number of clock signals at a preset frequency, and clearing the DATA in the shift register of each drive chip;
a5 outputs a high level of a clock width on the DATA signal at the output port of the controller, clears the clock rising edge counter at the input port of the controller, and starts counting;
a6 stops counting when the controller detects the DATA signal is high level through the input port, and obtains the number N of clocks2；
The A7 controller calculates formula W = N2the/F yields the width resolution.
6. The method for obtaining the resolution of the LED dot matrix display screen according to claim 5, wherein the preset frequency in the step A2 is 1 MHz.
7. The method for obtaining the resolution of the LED dot matrix display screen according to claim 5, wherein 204800 clock signals are output at the frequency of 1MHz in the step A4.
8. The method for obtaining the resolution of the LED dot matrix display screen according to claim 5, wherein the driving chip is a constant current driving chip of 75HC595 type.
9. A system for obtaining LED dot matrix display screen resolution, comprising: the LED dot matrix display comprises a controller, an upper computer and an LED dot matrix display screen, wherein the upper computer is in data connection with the controller, the controller is in control connection with the LED dot matrix display screen, and the method for acquiring the resolution of the LED dot matrix display screen as claimed in any one of claims 1 to 8 is stored in the controller and is used for the controller to execute and calculate the resolution of the LED dot matrix display screen.
10. The system for obtaining LED dot matrix display screen resolution of claim 9, wherein the controller comprises: the system comprises a main control chip, and each input port and each output port connected with the main control chip, wherein each output port is provided with a clock rising edge counter; the main control chip is in data connection with the upper computer; the LED dot matrix display screen comprises: the LED lamp is connected with the driving module in a control way; and the input and output ports of each path are respectively connected with the input and output interfaces of each path, so that the main control chip and the driving module form a closed control loop.
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|---|---|---|---|---|
| CN114999373A (en) * | 2022-05-31 | 2022-09-02 | 西安诺瓦星云科技股份有限公司 | Method, device, electronic equipment and medium for determining configuration scheme of display screen |
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Application publication date: 20200508 |