KR100857182B1 - Led electronic sign board and led electronic sign board bi-directional control system - Google Patents

Abstract

An LED electronic sign board and an LED electronic sign board bi-directional control system are provided to compensate for change in brightness of a LED due to deterioration of the LED and other causes subsequent to use of the LED sign board, to compensate for brightness more accurately by establishing a database including the change in the brightness subsequent to the use of the LED and applying the database information to the LED sign board, and to allow a manager to check corresponding information in real time if an error occurs as the LED needs to be replaced, thereby enabling speedy replacement. An LED electronic sign board includes an LED display panel(30) which includes a plurality of pixels having at least two LEDs; a panel driver(20) which drives the LED display panel to display an image on the LED display panel; an image processor(10) which converts an incoming image signal to a signal which can be processed by the panel driver and supplies the signal to the panel driver; a brightness detector(40) which detects brightness values of the LEDs of the LED display panel; a data storage unit(60) which stores reference brightness values of multiple levels for the LEDs and power supply values corresponding to the reference brightness values; and a controller(50) which searches one of the reference brightness values stored in the data storage unit which corresponds to a brightness value detected by the brightness detector, and controls the panel driver to drive the LED display panel according to one of the power supply values stored in the data storage unit which corresponds to the searched reference brightness value. The LED display panel has a single pixel which includes at least two of a red LED, a green LED, and a blue LED, the brightness detector is provided to detect brightness values of the red LED, the green LED, and the blue LED, and the brightness detector measures current values flowing through the LEDs, thereby the brightness values of the LEDs.

Description

LED signboard and LED signboard bidirectional control system {LED ELECTRONIC SIGN BOARD AND LED ELECTRONIC SIGN BOARD BI-DIRECTIONAL CONTROL SYSTEM}

The present invention relates to an LED signboard and an LED signboard bidirectional control system, and more particularly, to compensate for the change in the brightness of the LED due to the aging or other causes of the LED according to the use of the LED sign, and more efficient and faster management An LED signboard and an LED signboard bidirectional control system.

LED (Light Emitting Diode) means a light emitting diode that emits light, and is widely used in various electronic products and electronic display panels such as instrument panels in various colors such as red, green, blue, and yellow.

Among them, the LED signboard arranges a plurality of LEDs in a matrix form, and a plurality of LEDs arranged in a matrix form a pixel for displaying an image, thereby displaying an image. Such LED signboards are installed and used in various forms outside or inside the building for advertisement or delivery of various information.

The LEDs constituting the pixels of the LED display board may be aged according to their use, and in some cases, only some of the LEDs constituting the LED display board may fail. In case of malfunctioning LED due to aging or other causes, the brightness of the LED appears different from normal LED even when the same power is applied. In this case, the company that installed the LED signboard must find and repair or replace the malfunctioning LED.Because of the large size of the LED signboard, it is difficult not only to visually find the malfunctioning LED, but also the brightness of the entire LED sign is emitted. It is practically difficult to distinguish different LEDs with the naked eye.

In addition, even if one LED fails in the large LED display board to be enlarged, it is not easy to check the replacement of the failed LED can be replaced only when found by someone, making it difficult to quickly repair and replace according to the failure.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is to provide an LED sign that can compensate for the change in the brightness of the LED due to the aging or other causes of the use of the LED sign. have.

In addition, it is an object of the present invention to provide a LED signboard bidirectional control system that can database the change in brightness according to the use of the LED, and can be applied to the LED signboard again to enable more accurate brightness compensation.

In addition, when an error occurs that requires the replacement of the LED, the administrator can check the corresponding information in real time, to provide an LED signboard and LED signboard bi-directional control system that enables a quick replacement.

The object is according to the invention, an LED display panel consisting of a plurality of pixels having at least two LEDs; A panel driver configured to drive the LED display panel so that an image is displayed on the LED display panel; An image processor converting an input image signal into a signal that can be processed by the panel driver and supplying the image signal to the panel driver; A brightness sensing unit for sensing a brightness value of each LED of the LED display panel; A data storage unit for storing a plurality of levels of reference luminance values for the LEDs and supply power values corresponding to the reference luminance values; The panel driver controls the panel driver to drive the LED display panel according to the supply power value corresponding to any one of the reference luminance values stored in the data storage unit corresponding to the luminance value sensed by the luminance sensor. It can be achieved by the LED display, characterized in that it comprises a control unit.

Wherein at least two or more of the red LED, the green LED, and the blue LED constitute one pixel; The luminance detector may be provided to detect luminance values of each of the red LED, the green LED, and the blue LED.

The luminance detector may sense a luminance value of each LED by measuring a current value flowing through each LED.

The reference luminance value may be set to a plurality of levels of current values for each of the red LED, the green LED, and the blue LED.

The supply power value may be set to increase as the current value set as the reference luminance value decreases.

The controller may store state information including a luminance value detected for each of the LEDs by the luminance detector and a period of use of each of the LEDs in the data storage unit.

It further includes a network unit for exchanging data with the management server through the network; The control unit may transmit the state information stored in the data storage unit to the management server through the network unit.

If the reference luminance value corresponding to the luminance value detected by the luminance detection unit does not exist, the controller may transmit error data including the corresponding information to the management server through the network unit.

On the other hand, the above object is, according to another embodiment of the present invention, an LED display panel composed of a plurality of pixels having at least two LEDs, a panel driver for driving the LED display panel to display an image on the LED display panel, An image processor converting an input image signal into a signal that can be processed by the panel driver, and supplying the image signal to the panel driver; a luminance sensor configured to detect luminance values of the LEDs of the LED display panel; A plurality of LED display plates having a network unit for exchanging, and a control unit for transmitting the state information including the luminance value sensed for each of the LEDs by the brightness detecting unit and the period of use of each LED through the network unit; Also by the LED signboard bi-directional control system characterized in that it comprises a management server for analyzing the status information transmitted from the plurality of LED signboards to determine the operating state of each of the LED signboards, the database of the analyzed status information Can be achieved.

The controller of the LED sign may transmit error data including corresponding information to the management server through the network unit when the luminance value detected by the luminance detector is out of a preset reference luminance value.

According to the present invention by the above configuration, by compensating for the change in the brightness of the LED due to the aging or other causes of the LED according to the use of the LED signboard, it is possible to prevent the phenomenon that the image quality is reduced by changing the brightness due to malfunction of the LED. Will be.

In addition, it is possible to improve the quality, such as the image quality of the LED signboard by making a database of the change in brightness according to the use of the LED, and by applying the database information to the LED signboard more accurate compensation.

If an error occurs that requires the replacement of the LED, the administrator can check the corresponding information in real time, thereby enabling a quick replacement due to a failure.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

As illustrated in FIGS. 1 and 2, the LED display board 1 according to the present invention includes an image processor 10, a panel driver 20, an LED display panel 30, a brightness sensor 40, and data storage. The unit 60 and the control unit 50 are included.

The image processor 10 converts the input image signal into a signal that can be processed by the panel driver 20 and outputs the signal to the panel driver 20. Here, the image processor 10 may include an A / D converter for converting an image signal in the form of an analog signal into a digital signal, a gamma correction circuit for performing gamma correction, and the like. And a video sequential conversion circuit for separating the synchronization signal, the luminance signal, and the chroma signal. Here, the image processor 10 may be provided in various forms, and description thereof will be omitted.

At least two or more LEDs form one pixel in the LED display panel 30. In addition, the LED display panel 30 forms a screen on which a plurality of pixels are arranged in a matrix form to display an image. Here, the LED display panel 30 according to the present invention is an example of a full-color type in which the red LED, the green LED, and the blue LED form one pixel, and the red LED and the red LED are Of course, it can be provided in a three-color (3-color) type to form one pixel.

The panel driver 20 drives the LED display panel 30 to display an image on the LED display panel 30 based on a signal output from the image processor 10. Here, the panel driver 20 adjusts the emission and brightness of the LEDs forming the pixels, that is, the red LED, the green LED, and the blue LED, that is, the luminance, according to the signal output from the image processor 10, thereby displaying the LED display. The image is displayed on the panel 30.

The data storage unit 60 stores reference luminance values of a plurality of levels of the LEDs. The data storage unit 60 stores the power supply value corresponding to each reference luminance value. Here, for example, the reference luminance value is set to a plurality of levels of current values for each of the red LED, the green LED, and the blue LED in the case of a full-color type LED. 3 is a diagram illustrating a reference luminance value and a supply power value stored in the data storage unit 60 according to the present invention in a table form.

On the other hand, the brightness sensor 40 detects the brightness value of each LED constituting the LED display panel 30. Here, the luminance sensor 40 according to the present invention detects the luminance of each of the red LED, the green LED, and the blue LED in the case of each LED, for example, a full-color type. Taking the measurement to measure the luminance value of each LED is an example.

FIG. 4 is a diagram illustrating an example of a configuration for specifying current values flowing in the red LED, the green LED, and the blue LED constituting one pixel. As shown in the figure, the brightness sensor 40 measures the current value of each LED to sense the brightness, that is, the brightness value of the current LED.

The controller 50 searches for a supply power value for any one of the reference brightness values stored in the data storage 60 corresponding to the brightness value detected by the brightness sensor 40, and according to the found supply power value. The power supply value supplied to the LED is determined. The controller 50 controls the panel driver 20 so that the panel driver 20 drives the LED display panel 30 according to the determined supply power value.

According to the configuration as described above, the LED display board 1 according to the present invention, even if the brightness of the LED is changed according to the use of the LED display board 1 due to the aging or other causes of the initial set power supply value, By detecting this and changing the supplied power supply value, it is possible to compensate each LED to have the same brightness.

Hereinafter, the LED display board 1 according to the present invention will be described in more detail with reference to FIG. 5.

In the LED display panel 30 according to the present invention, several pixels may be configured as one module (hereinafter, referred to as an LED module). The panel driver 20 may include a plurality of module drivers 20a, 20b, and 20n to drive each LED module.

In addition, the data storage unit 60 may include a compensation value storage unit 62 storing the reference luminance value and the supply power value as described above. In addition, the data storage unit 60 may include an initial value storage unit 61 and a state storage unit.

The initial value storage unit 61 stores a supply power value supplied to each LED when used at the beginning of the LED display panel 1 according to the present invention. Herein, the controller 50 controls the panel to drive each LED module by each module driver 20a, 20b, 20n of the panel driver 20 according to a supply power value for each LED stored in the initial value storage 61. Each module driver 20a, 20b, 20n of the driver 20 is controlled.

As described above, the controller 50 changes the compensation value storage unit 62 when the luminance value of the specific LED is different from the luminance value stored in the initial value storage unit 61. The luminance is compensated by searching for a supply power value for compensating the luminance value and driving the corresponding LED according to the found supply power value. Here, as the luminance value sensed by the luminance sensing unit 40, that is, the current value decreases due to aging or other causes due to the use of the LED, the supply power value supplied to the corresponding LED increases.

On the other hand, the state value storage unit 63 stores the state information including the luminance value detected for each LED by the luminance sensor 40 and the usage period of the corresponding LED. That is, the controller 50 stores the state information including the luminance value detected by the luminance sensor 40 and the usage period of each LED each time the above-described compensation process is performed and makes a database thereof.

And, using the data stored in the state value storage unit 63 and the database, as shown in Figure 6, the control unit 50, for each LED of the color, that is, red LED, green LED and blue LED The period of use and the luminance values detected by the luminance sensor 40 when the period of use has elapsed may be tabulated and stored. In FIG. 6, the usage period is set to one year, but may be applied by setting the usage period less than one year or more than one year. Here, the luminance values for the LEDs of each color may be provided to store an average value of the luminance values of the LEDs of the corresponding colors constituting each pixel.

Referring back to FIG. 5, the LED display board 1 according to the present invention may include a network unit 70 exchanging data with the management server 3 through a network 5 such as an internet network. . Here, the controller 50 may transmit the state information stored in the state value storage unit 63 of the data storage unit 60 to the management server 3 through the network unit 70.

7 is a view showing the configuration of the LED signboard bidirectional control system composed of the LED signboards (1) and the management server (3) according to the present invention. As shown in the figure, the LED signboard 1 management system may include a plurality of LED signboards 1 and a management server 3.

Each LED signboard 1 and the management server 3 are interconnected via a network 5, and each LED signboard 1 stores the network 5 with status information stored in its own state value storage 63. Transfer to the management server (3) through.

At this time, the management server 3 can collect the state information transmitted from each LED sign 1, and analyze the collected state information to analyze the change in the use period and luminance value of the LED for each color. Such analyzed data can be reflected later in the development of the LED display board (1).

On the other hand, the control unit 50 of the LED display panel 1 according to the present invention is the compensation value storage unit 62 of the data storage unit 60 to the reference luminance value corresponding to the luminance value detected by the brightness detection unit 40 If not present, for example, when no current flows through a specific LED or an unexpected current value is detected, error data may be transmitted to the management server 3 through the network unit 70.

Through this, when the error data is transmitted from the LED display board 1, the management server 3 may analyze the error data to confirm that the corresponding LED of the LED display board 1 is in a state requiring repair or replacement. Accordingly, the manager can immediately react to the failure of a specific LED of the LED display board (1).

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that modifications may be made to the embodiment without departing from the spirit or spirit of the invention. . The scope of the alias will be defined by the appended claims and their equivalents.

1 is a diagram between the LED sign according to the invention,

2 is a control block diagram of an LED display board according to the present invention;

3 is a diagram illustrating a reference luminance value and a supply power value stored in a data storage of the LED display board according to the present invention in a table form;

4 is a diagram illustrating an example of a configuration for specifying current values flowing in the red LED, the green LED, and the blue LED constituting one pixel of the LED display board according to the present invention;

5 is a control block diagram of an LED display board according to another embodiment of the present invention;

6 is a diagram illustrating data stored in a state value storage unit of the LED display board according to the present invention in a table form;

6 is a view showing the configuration of the LED signboard bidirectional control system according to the present invention.

<Description of Major Numbers in Drawing>

1: LED signboard 3: management server

10: image processing unit 20: panel driver

30: LED display panel 40: luminance detection unit

50: control unit 60: data storage unit

61: initial value storage unit 61: compensation value storage unit

63: state value storage unit

Claims (10)

In the LED billboard, An LED display panel composed of a plurality of pixels having at least two LEDs; A panel driver configured to drive the LED display panel so that an image is displayed on the LED display panel; An image processor converting an input image signal into a signal that can be processed by the panel driver and supplying the image signal to the panel driver; A brightness sensing unit for sensing a brightness value of each LED of the LED display panel; A data storage unit for storing a plurality of levels of reference luminance values for the LEDs and supply power values corresponding to the reference luminance values; Search for any one of the reference luminance values stored in the data storage unit corresponding to the luminance value sensed by the luminance sensing unit, and supply the corresponding luminance value from the supplied power supply values stored in the data storage unit A control unit for controlling the panel driver to drive the panel display unit according to a power value; At least two or more of the red LED, the green LED, and the blue LED constitute one pixel; The brightness sensing unit is provided to sense brightness values of each of the red LED, the green LED, and the blue LED; And the brightness detector detects a brightness value of each LED by measuring a current value flowing through each of the LEDs. delete delete The method of claim 1, And the reference luminance value is set to a plurality of levels of current values for each of the red LED, the green LED, and the blue LED. The method of claim 4, wherein And the supply power value is set to increase as the current value set as the reference luminance value decreases. The method according to claim 1, 4 or 5, And the controller stores the state information including the luminance value sensed for each of the LEDs by the luminance detector and the period of use of each of the LEDs in the data storage unit. The method of claim 6, A network unit for exchanging data with the management server via a network; And the control unit transmits the state information stored in the data storage unit to the management server through the network unit. The method of claim 7, wherein If the reference luminance value corresponding to the luminance value sensed by the luminance detection unit does not exist, the controller transmits error data including the corresponding information to the management server through the network unit. . In the LED signboard bidirectional control system, An LED display panel composed of a plurality of pixels having at least two LEDs, a panel driver for driving the LED display panel to display an image on the LED display panel, and converting an input image signal into a signal that can be processed by the panel driver The image processing unit supplied to the panel driving unit, a luminance sensing unit for sensing a luminance value of each LED of the LED display panel, a network unit for exchanging data through a network, and the luminance sensing unit A plurality of LED display plates having a control unit for transmitting the state information including the luminance value sensed for the LEDs and the period of use of each LED through the network unit; And a management server analyzing the state information transmitted from the plurality of LED display plates to determine an operating state of each of the LED display plates, and to database the analyzed state information. At least two or more of the red LED, the green LED, and the blue LED constitute one pixel; The brightness sensing unit is provided to sense brightness values of each of the red LED, the green LED, and the blue LED; The brightness sensing unit measures the current value flowing through each of the LED, LED sign bidirectional control system, characterized in that for detecting the brightness value of each LED. The method of claim 9, The controller of the LED signboard transmits error data including corresponding information to the management server through the network unit when the luminance value detected by the luminance detector is outside a preset reference luminance value. Scoreboard bidirectional control system.

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