KR101728065B1 - Led sign board having a diagonal matrix module and error detection system using thereof - Google Patents

Abstract

According to the present invention, disclosed is an LED sign board having a diagonal structure matrix, and to a device error detection system using the same. The durability of the LED sign board is improved, and the determination of an error with respect to an LED device can be easily detected. The sign board according to the present invention comprises: an XY pattern and a YX pattern in which multiple LED devices are arranged to have a square structure in a sign board having a rectangular structure and LED devices disposed in a diagonal direction with respect to each other electrically come in contact with each other; an XY driver for performing electrical switching of rated power by the XY pattern; a YX driver for performing electrical switching of rated power by the YX pattern; a sign board controller for providing preregistered letters and graphic information on the basis of the XY pattern and the YX pattern; and a power supply unit including the XY driver and the YX driver, and supplying rated power to the sign board controller. Accordingly, damage to a driver cell of an LED sign board caused by an overload is minimized, and thus the durability of the sign board is improved. Line errors or device errors of the sign board are immediately detected, and thus the stability of a system can be ensured.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an LED electronic sign board having a diagonal structure matrix,

More particularly, the present invention relates to an electronic circuit board, and more particularly, to an LED (light emitting diode) constituting a rectangular electronic circuit board, which is in contact with a diagonal matrix, thereby physically restraining an overload of a decoder for driving an LED A reflexing sheet is provided so as to enhance the durability of the LED electronic display board and to recognize the light-off state of each LED line-by-line, so that the error detection can be easily realized with respect to the error- And a device error detection system using the same.

LED (Light Emitting Diode) is a light emitting diode that is a semiconductor device that emits light, and emits light of various colors such as red, green, blue, and yellow, and is utilized as an electronic display board for various electronic products, . A plurality of LEDs may be arranged in a tiled fashion, and an electric signboard may be implemented by lighting all or a part of the LEDs.

2. Description of the Related Art Generally, an electric signboard is a system for displaying various information in a visible state, and is widely used for commercial advertisement, stadium, multi-purpose, traffic signal, information and message delivery. Although the bulb was mainly used for the electric sign board, the fluorescent bulb has been mainly used in consideration of the electric power consumption of the bulb. However, in the case of a bulb or a fluorescent lamp, there was a limitation in reducing the size thereof, and thus, there was an inadequate aspect to express the image. For this reason, CRT (Cathode Ray Tube) or the like is used in recent years. However, due to the limitation of enlargement, an electric signboard composed of LEDs is becoming popular.

Currently, these LED signs are modular, and each module consists of 16 rows of pixels arranged horizontally and vertically. The LED pixel module means a basic unit that can change color by using one or more LEDs per pixel unit. The pixels may be classified into red-green (RG) pixels and red-green-blue (RGB) pixels according to the number of LEDs to be combined, depending on the shape and size of the LED. That is, a full-color LED composed of RGB, which constitutes one pixel module as a minimum unit for individual control, is composed of one or more 3in1 RGB Surface Mount Device (SMD) lamps.

However, since the LED display board having such a structure has a matrix structure in which the arrangement of the LEDs is divided into the X axis and the Y axis regardless of the system operation, the driver connected in the X axis or the Y axis is physically overloaded. For example, when the LEDs arranged in the X-axis direction are turned on, the driver cells in the Y-axis direction must extinguish the lighting currents of all the LEDs in the X-axis direction, so that the driver cells in the Y-axis direction are placed in the overload state.

Practically, errors of the LED electronic board are mostly line errors, and all of the lines constituting the X axis or the Y axis of the electronic board are all turned on. This is perceived as a serious error because the driver cell is damaged due to overload as described above. In addition, since a hardware error leads to replacement of a display board, there is a problem that an excessive amount of damage occurs in a development subject.

In particular, in recent years, an attempt has been made to ensure the stability of a system by detecting not only an error state of a display board, that is, a line error but also an LED element error, and for this purpose, a consumption current of each LED element is measured for the purpose of error detection . The measurement of the consumption current is based on the on-line connection, and the device error is informed to the external manager so that the device is replaced in the field. Therefore, a large amount of current measurement module is used for such error detection, and a problem of raising the manufacturing cost of the LED electric signboard is caused.

As a result, most of the currently applied LED electronic signboards are caused by hardware durability and error of the LED device, and it is becoming a serious error in the durability of the LED electronic signboard.

Korean Serial No. 10-096578, filed on June 16, 2010, entitled " Serial-connected LED Module with Matrix Display Function "

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to minimize the damage of the driver cell of the LED electronic signboard due to overload, to enhance the durability of the electronic signboard, Thereby ensuring the stability of the system.

Another object of the present invention is to provide a LED display device having a rectangular LED display panel comprising a vertical X axis and a Y axis by setting the electrical connection direction of each LED element to a first oblique direction of XY and a second oblique direction of YX The number of LEDs that can be turned on is minimized, thereby reducing the electrical load of each driver cell, thereby increasing the durability of the display board.

It is a further object of the present invention to provide a method of detecting an operation error of an LED element in an oblique direction off by measuring a reflected light source in accordance with the lighting state of an LED by utilizing a reflecting sheet in which a light source is easily diffused inside the sheet, So that the manufacturing cost for detecting the LED error can be remarkably lowered.

According to an aspect of the present invention, there is provided an LED electronic sign having a matrix of a diagonal structure, the electronic sign having a rectangular structure, wherein a plurality of LED elements are arranged to have a square structure; An XY pattern and a YX pattern which are electrically connected to an LED element located in a mutually diagonal direction between each of the LED elements; An XY driver for performing electrical switching of rated power in the XY pattern; A YX driver for performing electrical switching of rated power in the YX pattern; An electric sign board controller for providing pre-registered character and graphic information based on the XY pattern and the YX pattern; And a power supply unit including the XY driver and the YX driver to supply the rated power to the electric sign board controller.

According to another aspect of the present invention, there is provided an apparatus for detecting an element error using an LED display board having a matrix of a diagonal structure, the apparatus comprising: And a light sensor inside; A perforation section is formed so as to accommodate each of the LED elements provided in the Y-axis direction as a vinyl material whose surface is opaque color so as to be attached to the front surface of the electric sign board, Wherein the light emitting surface of the light emitting diode is arranged in a direction perpendicular to the light emitting surface of the light emitting device, Lt; / RTI > The electric sign board controller controls the turn-on of the XY driver in the test mode of the LED element, controls the YX pattern of the YX driver to flash sequentially, and recognizes the set operation of the photosensor, And identifies an error condition.

The cutting surface according to a preferred embodiment of the present invention is closely adhered on the lower outer peripheral surface of the LED element so that a part of the light source of the LED element is introduced into the cutting surface.

The reflective sheet according to a preferred embodiment of the present invention has a thickness of 1 mm to 3 mm so that an illuminating light source of the LED element is smoothly irradiated to the cutting surface.

In addition, the LED device constituting the electric signboard according to the preferred embodiment of the present invention is protruded to the front surface of the electric signboard.

The LED display panel having the matrix of the oblique structure and the device error detection system using the matrix of the diagonal structure proposed in the present invention minimizes the damage of the driver cell of the LED display panel due to overload and improves the durability of the display panel, It is possible to ensure the stability of the system by detecting it immediately. Also, by minimizing the number of LEDs that can be turned on maximum based on the LED array of the electric display panel, it is possible to reduce the electric load of each driver cell, thereby improving the durability of the electric display panel.

Further, by using a reflecting sheet which can easily diffuse the light source in the inside of the sheet, a reflected light source corresponding to the light-on state of the LED is measured to detect an operation error of the LED element when the light is turned off in the oblique direction, It is possible to remarkably reduce the manufacturing cost for the apparatus.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view for explaining a structure of a light guide plate using a matrix of a diagonal structure according to the present invention; FIG.
Fig. 2 is a diagram for explaining the operation of Fig.
FIG. 3 is a view illustrating a structure of an electric panel applied for detecting an error in an apparatus according to the present invention.
FIG. 4 is a view showing a reflection sheet applied in FIG. 3. FIG.
5 is a view for explaining an installation process of the reflecting sheet according to the present invention.
6 is a diagram for explaining a method of detecting an LED device error according to the present invention.

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

First, in the present invention, the LED elements constituting the LED electric sign board are arranged so as to have a tetragonal structure in the X axis and the Y axis as in the conventional art, but the patterns for electrical connection between the LED elements have a slanting structure. That is, each of the LED elements forms a pattern to be connected to the LED elements positioned diagonally to each other in the square structure.

The pattern of such a structure reduces the load on the driver for lighting the LED of the corresponding line when the arbitrary LED is lit on a line by line basis. For example, when eight LEDs are arranged in the X-axis direction and four LEDs are arranged in the Y-axis, all of the LEDs constituting one X-axis line are turned on, . However, in the case of configuring the pattern of each LED element in the oblique direction as in the present invention, since the load of the driver is limited to four LED elements, it can be minimized.

That is, by configuring the pattern of the LED electronic signboard of the rectangular structure as a diagonal line, the lighting load of the LED is reduced. This increases the durability of the display board, considering that driver overload is the cause of frequent failure of LED display board.

On the other hand, the pattern of the LED electric signboard is structured with a diagonal structure as in the present invention because the number of characters represented by diagonal lines in the Korean and English text is small when the letters are expressed through the electronic signboard. That is, in the case of Hangul, only 12% of the total of 19 consonants and 21 vowels are composed of 'ㅅ', 'ㅆ', 'ゃ', 'ㅉ' In the case of alphabetic characters, the letters including the shape of the oblique line among the total 52 characters are 13 letters as A, K, k, V, v, W, w, X, x, Y, This corresponds to 25%. On the other hand, a letter including a straight line shape is a letter A, B, D, d, E, F, H, h, I, , p, q, R, T, t, U, u, Z, z, which corresponds to 57% of the total 52 characters.

Therefore, by constituting the pattern structure of the LED electric signboard with a diagonal line, the burden on the driver for expressing the text or the like is remarkably reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an LED electric signboard having a matrix of a diagonal structure according to the present invention. FIG.

As shown in the drawing, a plurality of LED elements 111 are arranged to have a square structure in a display board 101 having a rectangular structure, and XY patterns (not shown) electrically connected to LED elements positioned in mutually diagonal directions between the LED elements 111 The XY driver 103 for electrically switching the rated power in the XY pattern 123 and the YX pattern 121 for performing electrical switching of the rated power in the YX pattern 121, An electric sign board controller 105 for providing pre-registered character and graphic information on the basis of the XY pattern 123 and the YX pattern 121, and an XY driver 103 and a YX driver 109 And a power supply unit 107 for supplying a rated power to the electric sign board controller 105.

Hereinafter, the operation of the present invention will be described with reference to FIG.

As described above, the electric sign board 101 has a rectangular structure, and each of the LED elements 111 is arranged in a square structure. That is, it is assumed that the number of the LED elements of the X-axis is designed to be larger than the number of the Y-axis LED elements. If the 'd' terminal of the YX driver 109 and the 1 st, 3 rd, 5 th, and 7 th terminals of the XY driver 103 are turned on to light up the LED elements a, b, To control the lighting.

Therefore, when the LED elements in the oblique direction are turned on, the load on the driver cell of the YX driver 109 corresponds to the power consumption of four LED elements. When all of the LED elements in the X-axis direction are turned on, that is, when the LED elements d, e, f, g, h, I, j, k are to be turned on as shown in the drawing, , 6, 7, 8, 9, 10, and 11 terminals of the XY driver 103 are turned on and one terminal in the X axis direction is turned on by turning on the terminals b, c, d, e, The line LED device is turned on.

As a result, when the lines of the LED elements formed in the X-axis direction are lit, the load amounts to the respective driver cells of the YX driver 109 and the XY driver 103 correspond to the power consumption of one LED element.

As a result, the XY driver 103 and the YX driver 109 can be configured as hardware by configuring the XY pattern 123 and the YX pattern 121 so that the pattern of the LED elements 111 constituting the electric sign board 101 has an oblique direction. The load on each of the driver cells constituting the driver is significantly reduced. The driver cell means a transistor, an FET, a high-power transistor, or the like constituting each driver 103, 109 for electrically switching each bit of the XY pattern 123 and the YX pattern 121.

By thus wiring the LED elements 111 of the electric display panel 101 to have the XY pattern 123 and the YX pattern 121, the load of the driver cell is minimized when arbitrary text or graphics are displayed, thereby increasing the durability of the electric display panel will be. Particularly, in recent years, the durability of the driver cell constituting the driver is very important, and the durability of the driver cell is the durability of the electric display board because the LED element of the electric screen board is used as the high-brightness LED element.

In the meantime, if the LED device 101 is arranged in a square structure from a rectangular-shaped electric signboard, the size of the electric signboard 101 changes according to the gist of the present invention. It will not escape.

As described above, the LED electronic circuit board 101 according to the present invention reduces the load on the driver through the XY pattern 123 and the YX pattern 121. In addition, in the present invention, The position of the LED element in which an error occurs is accurately detected, thereby improving the stability and functionality of the system.

3 and 4, a light sensor 303 is provided inside an installation groove 301 provided horizontally with the X-axis directional element 111 at one end of the electric sign board 101 And a perforation 407 is formed in the front surface of the electric sign board 101 so as to accommodate the LED elements 111 provided in the Y-axis direction as a vinyl material whose surface is coated with opaque color so as to be attached to the front surface of the electric sign board 101, And a light receiving surface 405 which is not colored at one end of the rear surface so as to correspond to the optical sensor 303. The light source of the LED element 111 is disposed on the cutting surface 403 of the perforation 407, And a reflection sheet 401 for guiding the light to the light sensor 303 through the light receiving surface 405 are attached to the front surface of the electric light guide plate 101 according to the arrangement of the installation grooves 301.

The electric sign board controller 105 controls the turn-on of the XY driver 103 in the test mode of the LED device and sequentially controls the YX pattern 121 of the YX driver 109 to blink, By recognizing the set operation of the sensor 303, the error state of one or more LED elements 111 is identified.

The reflector sheet 401 is attached to receive one line of the LED elements 111 in the Y-axis direction on one side of the electric sign board 101 in the row direction. This is a means for the light sensor 303 to detect the lighting state of any of the LED elements 111 arranged in the column direction. Accordingly, the reflective sheet 401 is made of a transparent vinyl material, and a non-transparent series is painted so that an external light source can not be introduced. The light receiving surface 405 provided at a position corresponding to the optical sensor 303 is not painted.

Thereafter, the reflective sheet 401 forms a perforation 407 corresponding to each of the LED elements 111 in the column direction, that is, the Y axis direction, and the perforation 407 has a perforation The cut surface 403 has a transparent state. The light source of the LED element 111 is introduced into the cutting surface 403 and then the light source of the LED element 111 enters the cutting surface 403, And is projected onto the light sensor 303 provided in the installation groove 301 through the light receiving surface 405. [

The perforation 407 of the reflecting sheet 401 is punched to be the same as or very close to the diameter of the LED element 111 so that the cutting surface 403 is brought into close contact with the outer surface of the LED element 111. Therefore, when the arbitrary LED element 111 is lit, the light source of the LED element 111 is reflected through the light receiving surface 405 after the diffused sheet 401 is diffusely reflected through the cutting surface 403 And is projected onto the optical sensor 303.

Fig. 5 illustrates that the reflecting sheet 401 according to the present invention is attached to the front surface of the electric sign board 101. Fig.

The reflector sheet 401 is provided in a row unit so as to be attached along the column direction or the Y axis direction so that the light receiving surface 405 of each reflecting sheet 401 is positioned so as to correspond to each mounting groove 301 Respectively. The reflective sheet 401 has a structure in which the LED element 111 is fitted into the perforation 407 and is formed so as to be smoothly irradiated with the lighting light source of the LED element 111 on the cutting surface 403, It is preferable to have a thickness.

The application of the reflective sheet 401 is preferable in a structure in which the LED elements 111 constituting the electric sign board 101 are protruded and in the case of a dot matrix structure in which the LED elements 111 do not protrude, ), The circular shape of the transparent state may be arranged so as to be smaller than the diameter of the LED element of the dot matrix. That is, the LED light source of the dot matrix is irradiated forward, and at the same time, a part of the light source is guided into the inside of the reflector sheet 401 through the circular shape.

6 is a view for explaining an operation state of the reflecting sheet 401 according to the present invention. The reflecting sheet 401 is provided in the column direction, i.e., the Y-axis direction, as described above, and corresponds to the arrangement of the optical sensors 303.

As shown in the figure, after the reflector sheet 401 is attached to the front surface of the electric sign board 101, the electric sign board controller 105 enters the LED element test mode. In the test mode, a test may be performed at a start time or an end time of the electric sign board 101, or an automatic test may be performed at a predetermined time period. That is, a test may be performed in the initial operation after the system of the electric sign board 101 is powered up for start-up, or a test may be performed at the time when the power is turned off for termination of the system.

The test mode is a programmed function of the electric sign board controller 105. When an error occurs in the LED device, the error information is notified to the manager by a separate communication means, or the position information of the errored device is registered and managed, So that the error device can be easily replaced.

In the test mode described above, all the bits of the XY driver 103 are turned on, and the YX driver 109 is sequentially flickered to quickly identify an errory device that has caused the error.

That is, the electric sign board controller 105 performs the turn-on control of the XY driver 103 in the test mode of the LED element, sequentially controls the YX pattern 121 of the YX driver 109, By recognizing the set operation of the sensor 303, the error state of one or more LED elements 111 is identified.

As shown in the figure, the XY driver 103 turns on all the bits and sequentially flashes a pattern corresponding to each bit of the YX driver 109, that is, a to k. For example, when the a-bit YX pattern is turned on, an LED element corresponding to Y1 of the reflecting sheet 401a is turned on. The light source according to lighting of the corresponding LED element is irradiated to the optical sensor 303 through the cutting surface 403 and the light receiving surface 405 of the reflector sheet 401a and the electric sign board controller 105 reflects the light reflected by the reflecting sheet 401a It is determined whether or not the LED element of Y1 located at the bottom of FIG.

When a YX pattern corresponding to the b bit of the YX driver 109 is turned on (a bit is turned off), an LED element corresponding to Y2 of the reflecting sheet 401a is turned on and Y1 of the reflecting sheet 401b is turned on Is turned on. Accordingly, the electric sign board controller 105 simultaneously detects the error state of the two LED elements by recognizing the operation state of the optical sensor corresponding to the reflection sheets 401a and 401b.

In the same manner, when the YX pattern corresponding to the d bits of the YX driver 109 is turned on, one LED element corresponding to Y4 of the reflecting sheet 401a is turned on, and Y3 One LED element corresponding to Y1 of the reflecting sheet 401d is turned on and one LED element corresponding to Y1 of the reflecting sheet 401d is turned on. That is, the four LED elements are lit in the oblique direction.

Thus, the electric sign board controller 105 determines whether or not the respective optical sensors corresponding to the reflection sheets 401a, 401b, 401c, and 401d are operated. If the light receiving signal is not recognized from the optical sensor of the reflecting sheet 401b, the LED element of Y3 corresponding to the reflecting sheet 401b is an error. Therefore, even if a plurality of LED elements are turned on for the testing of the LED elements, any one of the LED elements in which an error occurs can be identified.

As a result, the sequential flicker control of the YX driver 109 through the test mode of the LED device not only accurately identifies an error with respect to each LED device, but also allows the YX driver 109 to display the LED device with one- It is possible to check the error of the LED device extremely quickly. In addition, when determining the error of the LED device, unlike the existing current measuring method for each bit, only the optical sensor provided for each line can be used, thereby significantly reducing the number and the unit price of the measuring device.

101: Electronic sign board 103: XY driver
105: electric sign board controller 107: electric power supply unit
109: YX driver 121: YX pattern
123: XY pattern 301: installation groove
303: Optical sensor 401: Reflecting sheet
403: Cutting surface 405: Light receiving surface
407: Thorough study

Claims (5)

delete In an LED electronic sign having a matrix of a diagonal structure including an XY driver 203 and a YX driver 209,
And an optical sensor (403) inside the mounting groove (401) provided so as to correspond horizontally with the X-axis direction LED element (211) constituting the electric sign board;
A perforation 507 is formed so as to accommodate each of the LED elements 211 installed in the Y-axis direction as a vinyl material having a surface coated with an opaque color so as to be attached to the front surface of the electric sign board, And a light receiving surface 505 which is not colored at one end of the back surface so as to correspond to the optical sensor 403. The light source of the LED element 211 is disposed between the cutting surface 503 of the perforation 507 and the light receiving surface A reflective sheet 501 for guiding the light to be introduced into the optical sensor 403 through the mounting recesses 505 is attached to the front surface of the electric display panel according to the arrangement of the mounting recesses 401;
The electric sign board controller 205 controls the turn on of the XY driver 203 in the test mode of the LED element and sequentially controls the YX pattern 221 of the YX driver 209 to blink, And recognizes an error state of one or more of the LED elements 211 by recognizing the set operation of the one or more LED elements 211. The device error detection system using the LED display panel having the hatched line matrix. 3. The method of claim 2,
The cut surface 503 is in close contact with the outer peripheral surface of the lower end of the LED element 211 so that a part of the light source of the LED element 211 flows into the cutting surface 503. In this case, Device Error Detection System Using Electric Display Board. 3. The method of claim 2,
Wherein the reflective sheet 501 has a thickness of 1 mm to 3 mm so that the lighting light source of the LED element 211 is smoothly irradiated onto the cutting surface 503. In the LED display panel having a diagonal structure, Device error detection system. 5. The method according to any one of claims 2 to 4,
And an LED element (211) constituting the electric screen is protruded to a front surface of the electric screen.

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