TW202008050A - LED module, display and calibration system with traceability - Google Patents

Abstract

The invention discloses an LED module suitable for an LED display system. The LED module comprises: an interface circuit transmits a display data and a control signal between the LED display system and the LED module; a uniform conversion circuit is coupled to the interface circuit; the display data and a calibration parameter pre-stored in the uniform conversion circuit are computed to generate and output an grayscale data; a display memory stores the grayscale data and outputs the grayscale data; a constant current driving circuit is coupled to the display memory and outputs a constant current according to the grayscale data; and an LED lamp generates a light source to display an image according to the constant current.

Description

LED module, screen display and correction system with resume information

The invention relates to a light-emitting diode (LED) module, screen display and calibration system with history information, in particular to a calibration parameter and LED module history with non-volatile memory and pre-stored LED module Information (such as module number, screen display system number, LED lamp beads production information, elapsed time, etc.), LED screen display system and LED screen display and calibration system.

Traditional LED modules have uneven display of LED die, uneven driving circuit capability, or uneven package light characteristics, etc., resulting in uneven display of LED light emitting points, so traditional LED modules form large screen displays Afterwards, the development problem is more complicated. There is no systematic integration and connection of the production data of LED modules, such as production data of LED die, production data of LED packaging and testing, production data of driver IC, production data of LED circuit board, etc. The problem that leads to after-sales maintenance is also time-consuming, labor-intensive and costly. With the popularization of small-pitch LED displays and Micro LED displays, the number of LEDs required is increasing. When the LED module fails and needs to be repaired, it will be a more difficult problem.

Therefore, the present invention can overcome the above problems, so that each LED module maintains a consistent absolute brightness or light color, and the latest technology is used to make the history data of the LED module recorded in the non-volatile memory through wired or wireless means , Use the Internet of Things and Artificial Intelligence (Artificial Intelligence, hereinafter referred to as AI) big data technology for record query analysis, and can carry out after-sales certification of LED modules to achieve health tracking and maintenance management.

One of the purposes of the present invention is to make each LED module have a consistent absolute brightness or light color.

One of the purposes of the present invention is to enable each LED module to perform record query and analysis through the Internet of Things and AI data, and then predict the LED module that will fail.

One of the purposes of the present invention is that each LED module can be analyzed through AI data to predict new calibration parameters.

The invention is an LED module. The LED module includes: an interface circuit that transmits the transmission of a display data and a control signal between the LED module and the LED screen display system; a uniform standard conversion circuit coupled to the interface Circuit, and calculate the display data and a calibration parameter stored in the uniform standard conversion circuit in advance to generate and output a grayscale data; a development memory, store the grayscale data and output the grayscale data; a constant current drive The circuit, coupled to the display memory, outputs a constant current based on the grayscale data; and an LED lamp bead generates a light source based on the constant current to display an image.

The invention is an LED screen display system, comprising: an LED module array, which is composed of a plurality of LED modules, and each LED module includes: an interface circuit, transmitting the LED module and the LED screen display The transmission of a display data and a control signal between the systems; a uniform standard conversion circuit, coupled to the interface circuit, and calculating the display data and a calibration parameter stored in the uniform standard conversion circuit in advance to generate and output a Grayscale data; a display memory, which stores the grayscale data and outputs grayscale data; a constant current drive circuit, coupled to the display memory, outputs a constant current according to the grayscale data; and an LED lamp bead , Generating a light source according to a constant current to display an image; and an LED screen display controller, controlling the LED module array based on the display data and control signals; wherein, the LED screen display controller controls each LED module to store an LED screen Display system resume information (for example: number, production parameters, operating status, etc.).

The invention is an LED screen display and correction system, including: an LED screen display system with an LED module and used to generate an image; a correction control module to connect a recalibrated first correction parameter to the same The LED module resume information is stored in a non-volatile memory in the LED module; and an IoT control module uploads the first calibration parameters and LED module resume information to an IoT cloud system.

10‧‧‧LED module

11‧‧‧Interface circuit

12‧‧‧Uniform standard conversion circuit

13‧‧‧Development memory

14‧‧‧Constant current drive circuit

15‧‧‧ lamp beads

20‧‧‧LED display system

21‧‧‧LED module array

22‧‧‧LED display controller

30‧‧‧LED display and calibration system

31‧‧‧LED Calibration System

C‧‧‧Internet of things cloud system

FIG. 1 shows a schematic diagram of the LED module of the present invention.

FIG. 2 shows a schematic diagram of the LED module of the present invention applied to an LED screen display system.

FIG. 3 shows a schematic diagram of the LED module of the present invention applied to an LED screen display and correction system.

Please refer to FIG. 1, which shows a schematic diagram of the LED module of the present invention. The LED module 10 includes: an interface circuit 11, a uniform standard conversion circuit 12, a developing memory 13, a constant current drive circuit 14, and an LED lamp bead 15.

The interface circuit 11 transmits a display data and a control signal between the LED module 10 and the LED screen display system (not shown); the uniform standard conversion circuit 12 is coupled to the interface circuit 11 to receive the display data and display the data in advance A calibration parameter stored in the uniform standard conversion circuit 12 is operated to generate grayscale data and output the grayscale data to the development memory 13; the development memory 13 stores the grayscale data and outputs the grayscale data to the constant current drive circuit 14; The constant current driving circuit 14 is coupled to the display memory 13 and the LED lamp beads 15, and outputs a constant current according to the grayscale data, so that the LED lamp beads 15 generate a light source according to the constant current, so that the LED module 10 displays an image.

Please note that the uniform standard conversion circuit 12 further includes a non-volatile memory 12a. The non-volatile memory 12a is used to pre-store calibration parameters corresponding to the LED module 10, or LED module history information. In one implementation, the history The information can be realized by module number, screen display system number, LED lamp bead production information, elapsed time and other data.

In this embodiment, the uniform standard conversion circuit 12 receives the display data and calculates the display data with a calibration parameter stored in the uniform standard conversion circuit 12 in advance to generate grayscale data, and outputs the grayscale data to the development memory 13 . The constant current output by the constant current drive circuit 14 can be controlled for the X axis or Y axis of the LED lamp bead 15; wherein, the constant current drive circuit 14 can be implemented by a pulse width modulation circuit (Pulse Width Modulation, PWM). Since the non-volatile memory 12a of the present invention stores the calibration parameters of the LED module 10 when shipped from the factory, since this calibration parameter is a calibration parameter generated by an automatic calibration method of absolute brightness or light color, it is essentially a point-to-point calibration Therefore, the LED lamp beads display images can maintain a consistent absolute brightness or light color. In another embodiment, each group of LED lamp beads 15 includes red lamp beads (R), green lamp beads (G), and blue lamp beads (B).

Next, please also refer to FIG. 2, which shows a schematic diagram of the LED module of the present invention applied to an LED screen display system. The LED screen display system 20 includes an LED module array 21 and an LED screen display controller 22.

Please note that the LED module array 21 is composed of a plurality of LED modules 10, and in this embodiment, a plurality of LED modules 10 are connected in series and horizontally combined into an LED module array 21, and each LED module 10 includes The operation principle of the interface circuit 11, the uniform standard conversion circuit 12, the developing memory 13, the constant current drive circuit 14, and the LED lamp bead 15 is the same as that described above, and will not be repeated here.

The LED display controller 22 controls the LED module array 21 according to the display data and the control signal, wherein the display data and the control signal are from the cloud system of the Internet of Things (not shown) or the LED display correction system (not shown). The LED display controller 22 is responsible for transmitting display data and control signals to each LED module 10 in the LED module array 21, or transmitting control signals to the LED module history of the non-volatile memory 12a in the LED module 10 Read the information and send the LED module resume information to the LED screen display correction system or to the cloud system of the Internet of Things.

Please also refer to FIG. 3, which shows a schematic diagram of the LED module of the present invention applied to an LED screen display and calibration system. The LED screen display and correction system 30 includes an LED screen display system 20 and an LED correction system 31.

As mentioned above, the LED screen display system 20 has a plurality of LED modules 10 combined to form an LED module array 21 for generating images, and the non-volatile memory 12a in each LED module 10 is pre-set The calibration parameters corresponding to each LED module 10 or the LED module history information are stored.

The LED calibration system 31 includes: a calibration control module 31a for storing the recalibration parameters in the non-volatile memory 12a in the corresponding LED module 10; an IoT control module 31b for recalibrating the parameters and LED module history The information is uploaded to an Internet of Things cloud system C. Please note that due to the aging of the LED module 10 or the replacement of the surrounding LED module 10, the LED calibration system 31 needs to re-calibrate the LED module 10 to generate a re-calibration parameter to the corresponding LED module 10.

In one embodiment, the IoT cloud system C generates a control signal to the LED module 10, and the LED module 10 performs a self-detection process according to the control signal. The control signal controls the constant current drive circuit 14 to output a constant current to detect the LED lamp beads 15 Whether it is faulty; if the LED lamp bead 15 is faulty, the constant current drive circuit 14 obtains the coordinate data corresponding to the faulty LED lamp bead 15, and transmits the coordinate data to the interface circuit 12, and the interface circuit 12 stores the coordinate data in a non- In the volatile memory 12a, the interface circuit 12 transmits the coordinate data to the screen display system 20, and then the screen display system 20 transmits the LED calibration system 31, or the screen display system 20 directly returns to the IoT cloud system C .

Please note that the conventional LED screen display calibration method is not connected to the IoT cloud system, but as small-pitch LED screen display systems and Micro LED LED screen display systems gradually become more popular, the number of LED modules required is increasing. Many, when the LED module is about to fail or has been aging and needs to be recalibrated, it becomes very important to use the Internet of Things cloud system and AI to manage the LED screen display system and LED module.

In addition, the LED module history information stored in the non-volatile memory 12a can be read out in two ways; one is obtained by the calibration control module 31a through the traditional receiving card, and the other is obtained by the object The networked cloud system C uses the Internet of Things control module 31b to enable the Internet of Things control module 31b to read the LED module history information in the non-volatile memory 12a by wire or wirelessly. When the history information of the LED modules obtained by the IoT cloud system C is analyzed by AI data, it is predicted which LED module 10 will fail, and the maintenance and replacement before the failure will be done in advance. If the aging LED module can also obtain the current usage status from the usage data record of the non-volatile memory 12a, the new calibration parameters can be obtained through the AI data calculation analysis. The cloud system C of the Internet of Things can directly transmit the new calibration parameters to the LED screen The non-volatile memory 12a in the aging LED module 10 of the display system may transmit new correction parameters through the Internet of Things control module 31b, and the correction control module 31a is used to use the new correction parameters by wired In this way, the new calibration parameters are stored in the non-volatile memory 12a in the aged LED module 10, and the display data and the new calibration parameters stored in the uniform standard conversion circuit 12 are calculated to generate new grayscale data , So that the absolute brightness or light color of the LED module 10 and the adjacent LED module 10 can be kept the same, no need to perform the calibration of the traditional whole-chip LED screen display system 20, avoiding time-consuming and labor-intensive, and more achievable Point-to-point correction.

Please note that during the use of the LED module 10, the LED display controller 22 controls the non-volatile memory 12a in each LED module 10, which stores the LED display system history information of the LED display system 20, and is not The volatile memory 12a records the usage status of the LED module 10 as data for AI analysis of the cloud system C of the Internet of Things. This method can effectively carry out after-sales history certification of the LED module 10, and then achieve health tracking, maintenance and management. Each LED module 10 will also have a QR code, which can be directly connected to the cloud system C of the Internet of Things. Through this link, you can know the production history data of each LED module 10, which can be used with the non-volatile memory 12a in the LED module 10, that is, when the non-volatile memory 12a in the LED module 10 fails, You can still link to the cloud system C of the Internet of Things through the QR code to search the resume information of the LED module 10 for AI data analysis and maintenance.

The working mode of the LED module 10 of the present invention can be divided into three stages; the first is the factory manufacturing stage, the second is the customer use stage, and the third is the failure repair stage. In the factory manufacturing stage, the LED module 10 basically exists as a module type, and directly transmits data to the non-playing memory 12a in the LED module 10 through the manufacturing tool to transfer the correction parameters of the LED module 10 And resume information is written or read out.

In the stage of customer use, the LED module 10 is assembled to exist as an LED screen display system 20, as shown in FIG. 2. The working mode at this stage requires the LED screen display controller 22 to write the LED screen display system history information into the LED module 10 in each LED module array 21 to store the LED screen in the non-volatile memory 12a Display system history information and store LED module 10 usage status. At this stage, the user can write or read the LED screen display system history information and the LED module 10 usage status in the non-volatile memory 12a through the LED screen display controller 22 for AI data analysis and health tracking management. If the LED module 10 is found to be abnormal in use, the corresponding LED module 10 can be found through the LED screen display system history information and the LED module history information, and the LED module history information of the LED module 10 can be queried and analyzed.

The fault maintenance stage can be divided into two situations: the uneven development of the module due to aging, and the failure of the normal development of the module. If it is the former, the usage status of each LED module 10 and the LED module history information can be used to predict new calibration parameters through AI (Artificial Intelligence, AI for short) data analysis. This situation does not require on-site operation, and can be accomplished through wired or wireless communication with the LED display controller 22. However, if it is the latter, the LED module 10 on the LED screen display system 20 fails to display normally, you need to go to the site to replace the new LED module 10, and then use AI data to analyze the use status and LED module of the adjacent old module The group history information is analyzed to calculate new correction parameters, so that the new LED module 10 maintains the same absolute brightness or light color as the adjacent old module, and is supplemented by the LED correction system 31 for confirmation. The damaged LED module 10 can be sent back to the factory for repair. The LED module history information of the non-volatile memory 12a in the LED module 10 can also be used to assist in diagnosis and repair, and the diagnosis result can be fed back to the AI data database. It is the basis for continuous improvement.

In summary, the present invention proposes a framework for calibration with LED modules. The calibration parameters generated by the automatic calibration method of absolute brightness or light color store the calibration parameters and history information in the non-volatile before the LED module leaves the factory. In memory. During the use of the LED module, the LED screen display controller will write the screen display number to the module and record the use status, etc. in the non-volatile memory, and can also be used for AI cloud data calculation. This method can effectively authenticate the after-sales history of the module, and then achieve health tracking, maintenance and management. The calibration parameters in the LED module will be converted into uniform standard conversion operations with the input display image data, so that each LED module maintains a consistent absolute brightness or color and achieves point-to-point correction.

Although the embodiments of the present invention have been described above, they do not limit the scope of the present invention. As long as they do not deviate from the gist of the present invention, various modifications or changes made by those in the industry fall within the scope of patent application of the present invention.

10‧‧‧LED module

11‧‧‧Interface circuit

12‧‧‧Uniform standard conversion circuit

13‧‧‧Development memory

14‧‧‧Constant current drive circuit

15‧‧‧ lamp beads

Claims (12)

An LED module suitable for an LED screen display system. The LED module includes: an interface circuit that transmits a display data and a control signal between the LED module and the LED screen display system; a uniform standard conversion circuit , Is coupled to the interface circuit, and calculates the display data and a calibration parameter stored in the uniform standard conversion circuit in advance to generate and output a grayscale data; a developing memory stores the grayscale data and outputs The grayscale data; a constant current drive circuit, coupled to the display memory, outputs a constant current based on the grayscale data; and an LED lamp bead generates a light source to display an image based on the constant current. The LED module of claim 1, wherein the uniform standard conversion circuit includes: a non-volatile memory for storing the calibration parameter corresponding to the LED module or an LED module history News. The LED module according to claim 2, wherein the LED module performs a self-detection process according to the control signal, the control signal controls the constant current drive circuit to output the constant current to detect whether the LED lamp bead Failure; the constant current drive circuit obtains a coordinate data corresponding to the failed LED lamp bead, and transmits the coordinate data to the interface circuit, and the interface circuit stores the coordinate data in the non-volatile memory, or The coordinate data is transmitted to the screen display system by the interface circuit. An LED screen display system includes: an LED module array, which is composed of a plurality of LED modules, and each LED module includes: an interface circuit that transmits the LED module and the LED screen display system Between a display data and a control signal; a uniform standard conversion circuit, coupled to the interface circuit, and combining the display data with a calibration parameter previously stored in the uniform standard conversion circuit to generate and output a gray Data; a display memory, which stores the grayscale data and outputs the grayscale data; a constant current drive circuit, coupled to the display memory, outputs a constant current based on the grayscale data; and an LED lamp Beads, generating a light source according to the constant current to display an image; and an LED screen display controller, controlling the LED module array according to the display data and the control signal; wherein, the LED screen display controller controls each of the LED modules The group stores an LED screen display system resume information. The LED screen display system according to claim 4, wherein the uniform standard conversion circuit includes: a non-volatile memory for storing in advance the calibration parameters corresponding to the LED module, or an LED module CV information, or LED screen display system CV information corresponding to one of the LED screen display systems. The LED screen display system according to claim 5, wherein the LED module performs a self-detection procedure according to the control signal, the control signal controls the constant current drive circuit to output the constant current to detect whether the LED lamp beads Failure; the constant current drive circuit obtains a coordinate data corresponding to the failed LED lamp bead, and transmits the coordinate data to the interface circuit, and the interface circuit stores the coordinate data in the non-volatile memory, or The coordinate data is transmitted to the screen display system by the interface circuit. The LED screen display system according to claim 6, wherein the LED screen display controller also transmits the stored data of the non-volatile memory to an LED screen display correction system or an Internet of Things cloud system. An LED screen display and correction system includes: an LED screen display system with an LED module for generating an image; a correction control module for storing a first correction parameter in one of the LED modules Non-volatile memory; and an IoT control module, upload the first calibration parameter and LED module history information to an IoT cloud system. The LED screen display and correction system as described in claim 8, wherein the LED screen display system includes: an LED module array, which is composed of a plurality of LED modules, and each of the LED modules The LED module includes: an interface circuit that transmits the transmission of a display data and a control signal between the LED module and the LED screen display system; a uniform standard conversion circuit that is coupled to the interface circuit and connects the display The data and a second calibration parameter or the first calibration parameter stored in the uniform standard conversion circuit in advance are calculated to generate and output a grayscale data; a developing memory stores the grayscale data and outputs the grayscale data A constant current drive circuit, coupled to the display memory, which outputs a constant current based on the grayscale data; and an LED lamp bead that generates a light source to display an image based on the constant current; and an LED display controller , The LED module array is controlled according to the display data and the control signal; wherein, the LED screen display controller controls each LED module to store an LED screen display system history information. The LED screen display and calibration system according to claim 9, wherein the uniform standard conversion circuit has the non-volatile memory for storing in advance the second calibration parameter corresponding to the LED module, or the first A calibration parameter, or LED module history information, or LED screen display system history information corresponding to one of the LED screen display systems. The LED screen display and calibration system according to claim 10, wherein the LED module performs a self-detection procedure according to the control signal, and the control signal controls the constant current drive circuit to detect whether the LED lamp bead is malfunctioning; the The constant current drive circuit obtains a coordinate data corresponding to the failed LED lamp bead, and transmits the coordinate data to the interface circuit, and the interface circuit stores the coordinate data in the non-volatile memory or from the interface The circuit transmits the coordinate data to the screen display system. The LED screen display and calibration system according to claim 11, wherein the LED module has a QR code, and the LED module can be directly connected to the IoT cloud system or to the LED through the QR code Calibration system for AI data analysis and LED module maintenance.

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