KR100788985B1 - Electric sign board using led module and control method thereof - Google Patents

Abstract

An electric signboard using an LED(Light Emitting Diode) module and a control method thereof are provided to exchange and repair only the LED module including broken LEDs, by separately installing plural LED modules at the electric signboard. An electric signboard using an LED module(110) is composed of an electric signboard housing(130); a front plate(150) attached with a guide sign sheet printed with words and signs and installed on the front side of the electric signboard housing; plural LED modules composed of a substrate(112) and plural LEDs(111) installed on the substrate, and separated at the back side of the electric signboard housing at regular intervals to irradiate the light emitted from plural LEDs, to the guide sign sheet; an LED module housing(120) provided with a predetermined space for containing the LED module and inserted to the back side of the electric signboard housing; a control unit turning on or off the LEDs installed at the LED module, controlling the amount of current applied to each LED module, and detecting the defective state of the LED module according to the amount of current applied to the LED modules; and a communication module transmitting the detection result to an administrator system if the control unit detects defects of the LED module.

Description

Electric sign board using LED module and control method

1 is an exploded perspective view showing an electronic board using an LED module according to the prior art.

Figure 2 is an exploded perspective view showing an electronic board using an LED module according to the present invention.

Figure 3a is a side cross-sectional view of the sign board using the LED module according to the present invention.

Figure 3b is a side cross-sectional view of the sign board using the LED module according to the present invention.

Figure 4 is a rear view showing an electronic board using an LED module according to the present invention.

5 is a configuration diagram of an electronic board using an LED module according to the present invention.

Figure 6 is a flow chart schematically showing a control method of the display board using the LED module according to the present invention.

7 is a front view of an LED module driven according to the control method of FIG.

-Explanation of symbols for the main parts of the drawings-

110: LED module 111: LED

111 ': Error LED 111 ": Peripheral LED

112: substrate 120: LED module housing

120 ': first LED module housing 120 ": second LED module housing

121: insertion portion 122: fastening hole

123: fixing part 124: bracket

125: fastener 127: front

130: electronic board housing 131: mounting groove

132: insertion groove 140: guide cover sheet

150: front panel 160: operator system

170: communication module 180: control unit

190: protective cap 191: ventilation hole

The present invention relates to an electronic board using an LED module, and more specifically, it is possible to attach and detach from the back side of the electronic signboards such as road signs, billboards, and the like using an LED module for detecting LED errors and maintaining the brightness of the LED normally. And to a control method thereof.

In general, the electronic display board is designed and installed to display various characters and graphics by arranging LEDs or small fluorescent lights in a matrix form, and the display data of the various characters and graphics is transmitted from the operator system to the electronic display board to provide various guidance and It performs functions such as publicity.

The road sign using the LED module installed in the section or intersection of the road, such as a signboard, so that the driver can easily recognize the road or place names, as shown in Figure 1, the guide cover sheet 10, the transparent plate ( 20, and the LED module 30 is fixed to the inside of the housing 40, the sign is configured, the sign is supported by a support frame (not shown) installed on the side of the road, and performs the function of road guidance for the driver.

Specifically, the guide cover sheet 10 is formed with letters and symbols for guiding the road, the transparent plate 20 serves to support the guide cover sheet 20 on the back side of the guide cover sheet 10. Do it.

In addition, the LED module 30 is located on the rear side of the transparent plate 20, a plurality of LEDs 31 are arranged on the surface so as to be spaced apart at regular intervals in the vertical direction.

On the other hand, the housing 40 serves to receive and fix the LED module 30, the transparent plate 20, and the guide cover sheet 10 in sequence, the cover 40 in the shape of the cover in all directions. The fixing bracket 41 is formed to fix the LED module 30, the transparent plate 20, and the guide cover sheet 10 which are sequentially received inside the housing 40.

Such a road sign using a conventional LED module has a plurality of LEDs disposed in the LED module 30 in a situation where it is difficult for the driver to recognize the road sign with the naked eye due to bad weather at night or due to heavy fog, snow, or rain. 31 emits light, the light irradiated from the LED 31 is transmitted through the transparent plate 20 and irradiated forward from the rear of the guide cover sheet 10 to form letters for road guidance formed on the guide cover sheet 10 or Makes it easy for the driver to recognize the signs.

However, the road sign using the conventional LED module described above indicates that when an error occurs because some of the plurality of LEDs 31 arranged in the LED module 30 at regular intervals have reached the end of their lifetime or have a failure, If not repaired or replaced, the illuminance of the entire LED module 30 is reduced so that the driver recognizes the guide letters and symbols, etc. of the guide cover sheet 10, and thus, the guide marker due to the reduced illuminance of the LED module 30. There existed a problem that the case where the content of the sheet | seat 10 cannot be recognized correctly arises.

The present invention has been made to solve the above object, by dividing the LED module in a predetermined interval on the back side of the display panel housing, when the LED inside the display panel is out of life or failure, the back side of the display panel housing LED module can be easily dismantled and repaired by dismantling the LED module, and the LED board can be used to replace and repair the LED by dismantling only the LED module containing the problem LED. .

In addition, when an error occurs in at least one of the plurality of LEDs mounted on the LED module, the present invention may increase the amount of current applied to the peripheral LED in which the error occurs to maintain the brightness of the LED module normally, and each LED module The purpose of the present invention is to provide a control method of an electronic board using an LED module that can detect whether a defective state according to an error occurrence rate and transmit it to an operator system.

According to an aspect of the present invention for achieving the above object, an electronic board using an LED module, the electronic board housing; A front plate attached to the guide cover sheet having letters and symbols formed thereon and installed on the front of the display housing; A plurality of LED modules including a substrate and a plurality of LEDs installed on the substrate, the plurality of LED modules being spaced apart from the rear surface of the display panel housing so that light emitted from the plurality of LEDs irradiates the guide cover sheet; An LED module housing having a predetermined space for accommodating the LED module and inserted into a rear surface of the display housing; A controller configured to turn on / off the LEDs mounted on the LED modules, control the amount of current applied to each LED module, and detect whether the LED module is defective according to the amount of current applied to each LED module; And a communication module that transmits the detection result to an operator system when a failure of the LED module is detected from the control unit, wherein the control unit causes a current to be applied to each of the plurality of LEDs and is applied to each of the plurality of LEDs. Detects the amount of current and compares it with a reference current value to detect the error of the LED, increases the amount of current of the LED located around the LED where the error occurs to control the brightness of the LED module, and to control the brightness of the LED mounted on the LED module When the error occurrence rate, which is a ratio of the number of LEDs in which the error occurs among the total number, reaches the reference error occurrence rate, it is determined that the corresponding LED module is in a bad state, and the determination result is transmitted to the operator system.

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In addition, the reference error occurrence rate is characterized in that 5 to 15%.

In addition, the LED module housing is characterized in that the front surface is mounted so as to interview the front plate.

In addition, the LED module housing is characterized in that the transparent acrylic.

In addition, the LED module housing is characterized in that a plurality of mounted so as to be spaced apart a predetermined interval on the back of the housing housing the guide cover sheet.

In addition, the spaced interval between the LED module housing is characterized in that spaced apart so that a portion of the light irradiated from the LED module overlaps with a portion of the light irradiated from the neighboring LED module.

In addition, the present invention comprises the steps of: a) driving the LED of the LED module by applying a current of a predetermined reference current amount to each LED mounted on the LED module; b) comparing a current amount applied to each LED with a predetermined reference current amount; c) determining that an error has occurred when an LED less than a reference current amount is detected as a result of the comparison, and compensating the brightness of the LED module by increasing the amount of current applied to the LEDs located near the error LED; d) comparing the error occurrence rate and the reference error occurrence rate of the LED mounted in each LED module for each LED module; And e) determining that the corresponding LED module is in a bad state when the error occurrence rate of the LED is equal to or greater than a preset error occurrence rate, and transferring the information to an operator system.

In addition, in step a, the reference current amount is characterized in that 50% of the maximum amount of current that can be applied to one LED.

In addition, in step c, the amount of current applied to the LED around the error LED is characterized in that 70% of the maximum amount of current that can be applied to one of the LED.

In addition, in step d, the reference error occurrence rate is characterized in that the error occurs in the LED of 5 to 15 %% of the LED mounted on the LED module.

Therefore, when the LED inside the display board reaches its end of life or fails, the LED module housing is dismantled on the rear side of the display board housing to simplify the repair and replacement of the LED.

In addition, by dividing and mounting a plurality of LED modules on the electronic board, when replacing or repairing the LED, it is possible to replace and repair the LED by dismantling only the LED module including the problematic LED without having to replace and repair the entire LED module. Because of this, there is an effect that can reduce the cost of replacing and repairing the LED.

In addition, it detects an error in the LED and increases the brightness of the LED around the LED where the error occurs, so that the overall brightness of the LED module can be adjusted. By transmitting to, it is possible to replace and repair the LED module in which a failure occurs in a short time.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the display board using the LED module according to the present invention.

2 is an exploded perspective view showing an electronic board using an LED module according to the present invention, Figure 3 is a combined perspective view showing an electronic board using an LED module according to the present invention, as shown, the LED module according to the present invention The display board used is an LED module 110 having a plurality of LEDs 111 installed therein, an LED module housing 120 having a predetermined space for accommodating the LED module 110, and operation of the LED module 110. Control unit 180 for controlling the (see Fig. 3), the LED panel housing 120 is inserted into the rear panel side housing 130, and the front plate mounted on the front side of the panel housing 130 ( 150).

Specifically, the LED module housing 120 has a box-shaped insertion portion 121 having an open rear surface, and a plurality of fastening holes 122 formed therein so that the flange extends outward from the rear edge of the insertion portion 121. It is comprised including the fixing part 123 of a shape.

The LED module 110 includes a substrate 112 having an LED driving circuit, and a plurality of LEDs 111 installed on the substrate 112 and driven according to an electrical signal of the controller 180.

The controller 180 includes a communication module 170 (see FIG. 5) receiving a signal from an operator system 160 (see FIG. 5), to turn on / off the LED 111 mounted on the LED module 110. It drives, controls the brightness of each LED 111, and detects whether the respective LED module 110 is defective and transmits it to the operator system.

The front surface of the electric light plate housing 130 is formed with a mounting groove 131 of the same shape as the front plate 150 so that the front plate 150 is inserted and mounted, the back of the insertion portion of the LED module housing 120 ( A plurality of insertion grooves 132 are formed so that 121 is inserted.

The front plate 150 is attached to the guide cover sheet 140 is formed with a guide letter and symbol formed on the front surface, and is inserted into the mounting groove 131 of the electronic display housing 130.

Specifically, the controller 180 drives the LEDs 111 by applying a current equal to the reference current amount (the reference current amount is 50% of the maximum current amount that can be applied to one LED) to each LED 111, The amount of current applied to each LED 111 is detected and compared with the reference current amount to detect whether the LED 180 is in error.

In addition, by increasing the amount of current applied to the peripheral LEDs to compensate for the brightness of the LED 180 in which an error occurs, the output is increased, so that the brightness of the entire LED module 110 can be maintained normally.

In addition, the controller 180 may reach an error occurrence rate of the LED 111 mounted in the LED module 110 (a ratio of the number of LEDs in which an error occurs among the total number of LEDs mounted in the LED module). Then, it is determined that the corresponding LED module 110 is in a bad state, and transfers this information to the operator system.

That is, the controller 180 determines that the corresponding LED module is in a bad state when an error occurs in an LED of 5 to 15% or more of the total number of LEDs mounted on the LED module.

Referring to FIG. 7, the error detection and failure detection functions of the controller 180 will be described by way of example. When the LED module 110 is equipped with four LEDs 111 each in the horizontal and vertical directions, the The LEDs 111 are electrically connected in series in rows a, b, c, and d in the horizontal direction, and in columns ①, ②, ③, and ④ in the vertical direction.

The controller 180 detects an amount of current applied to the LEDs positioned in the four rows a, b, c, and d and four columns of ①, ②, ③, and ④, and, if a reference is applied to one LED 111 When the amount of current is 2.5 mA, the amount of current applied to each row and each column of four LEDs 111 will be 10 mA each.

However, when the LED located in the b row ② column among the LEDs has a failure or the end of life, the amount of current applied to the b row is a total of 7.5mA. In addition, the total amount of current applied to the ② column also becomes a total of 7.5mA.

Accordingly, the controller 180 detects a row and a column having a reference current amount less than 10 mA to detect a position of the LED 111 ″ in which an error occurs.

Subsequently, the controller 180 detects the position of the LED 111 " where the error occurs, increases the amount of current between the LED 111 " and the neighboring LED 111 " Compensate for the brightness of module 110.

That is, the brightness of the LED module 110 is adjusted by increasing the amount of current applied to the b row or the ② column.

Preferably, the controller 180 controls the amount of current applied to the plurality of LEDs 111, and accordingly, the amount of current applied to the LED 111 'around the LED 111 " Control the brightness of the LED module 110 by increasing.

In addition, the controller 180 indicates that the LED module 110 is in a bad state when the number of the LEDs 111 ″ having an error among the 16 LEDs 111 mounted on the LED module 110 reaches 5 to 15%. Determine and send this information to the operator system.

On the other hand, the LED module 110 is mounted on the back side of the insertion portion 121 of the LED module housing 120, the LED module housing 120 that accommodates the LED module 110 is the back of road signs, etc. Many are spaced apart at regular intervals on the side, and this coupling relationship will be described with reference to FIGS. 3A and 3B.

3A and 3B are side cross-sectional views of an electronic board using an LED module according to the present invention. Referring to the drawings, a plurality of fastening holes 122 are formed in the fixing part 123 of the LED module housing 120. After the insertion part 121 inserts the insertion part 121 into the insertion groove 132 by penetrating the rear side of the display panel housing 130, a bolt is inserted into the fastening hole 122 of the fixing part 123. The LED module housing 120 is mounted using the fastening means.

In addition, before the LED module housing 120 is mounted on the display housing 130, the LED module 110 is mounted on the back side of the insertion part 121. For this purpose, the fixing part 123 is the insertion part. In addition to the outside of the rear edge of the rear side of 121, it extends in the inward direction, and a fastening hole 125 is also formed in the inwardly extending portion (hereinafter, referred to as the bracket 124) and the bracket 124 is formed. ) In close contact with the substrate 112 of the LED module 110, and then mounts the LED module 110 to the LED module housing 120 using a fastening means such as a bolt to the fastening hole 122.

For this reason, when some of the plurality of LEDs 111 mounted on the LED module 110 reach the end of life or fail, fastening of bolts or the like from the fastening holes 122 provided in the LED module housing 120. After dismantling the means to separate the LED module 110 from the sign housing 130, the LED module 110 can be easily replaced.

In addition, by mounting a plurality of LED modules consisting of the LED module 110 and the LED housing 120 on the back side of the sign housing 130 so as to be connected in parallel spaced apart at regular intervals, the end of life or includes a broken LED Since only replacing or repairing the LED module housing 120, there is no need to replace the entire series of LED modules connected in series when replacing the LED as in the existing, there is an effect that can reduce the repair and replacement costs.

Referring to FIG. 3B, preferably, a cover-shaped protective cap 190 having an open front surface may be mounted so that the LED module 110 on the rear side of the LED module housing 120 is not exposed to the outside and is damaged. have.

More preferably, a plurality of ventilation holes 191 may be formed on the rear surface of the protective cap 190 to radiate heat generated from the LED module 110.

On the other hand, the front surface 127 of the insertion portion 121 of the LED module housing 120 is interviewed with the front plate 150 is attached to the guide cover sheet formed with a guide letter and symbol for transmitting information to the front plate It serves to prevent the phenomenon that the 150 is bent or deformed.

At this time, the LED module housing 120 uses a transparent acrylic (transparent acrylic) to the light emitted from the LED 111 does not interfere with the insertion portion 121 by a predetermined range of irradiation angle forward. It is desirable to have.

Figure 4 is a rear view showing an LED board using the LED module according to the present invention, the arrow shown shows the irradiation range of the light generated from the LED (111).

The plurality of LED module housings 120 mounted on the back of the electronic sign housing 130 are mounted so as to be spaced apart from each other by a predetermined interval R. The light generated from the LEDs 111 is attached to the front plate 140 to which the road guide sheet 140 is attached. The entire area of 150 must be investigated so that the driver can easily recognize the road sign with the naked eye even at night or in bad weather conditions.

Therefore, the interval between the LED module housing 120 is the intersection of the arrow A indicating the LED irradiation range of the first LED module housing 120 'and the arrow B indicating the LED irradiation range of the second LED module housing 120 ". It is preferable to set the spacing between the LED module housing 120 to be spaced apart by R so as to be located at least on the outside of the front plate 150 from the display housing 130.

That is, the spacing interval of the LED module housing 130 is spaced so that a portion of the light irradiated from the LED module 110 overlaps with a portion of the light irradiated from the neighboring LED module 110.

As such, the light emitted from the LED 111 may cover the entire area of the front panel 150 so that the light of the LED 111 irradiated from the rear of the front panel 150 may be exposed even at night or in a bad weather. By the guide cover sheet 140 attached to the front plate 150 can be easily confirmed with the naked eye.

5 is a view schematically showing the configuration of a signboard using the LED module according to the present invention, Figure 6 is a flowchart showing a control method of the signboard using the LED module according to the present invention, Figure 7 is a control method of Figure 6 Is a front view of an LED module driven according to.

As shown in the figure, in order to operate the electronic display board using the LED module according to the present invention due to weather worsening due to nighttime, heavy fog, snow, rain, etc., the controller 180 controls the operator system through the communication module 170. Receiving a signal from the 160 to output a signal so that the current of the predetermined reference current amount is applied to the LED module 110 so that a plurality of LEDs 111 mounted on the LED module 110 to emit light (S100).

At this time, the LED 111 is generally set to the maximum amount of current that can output the maximum output, the reference current amount applied to each LED 111 to emit the LED 111 is approximately 50% of the maximum current amount Is preferably.

Subsequently, the controller 180 compares a current amount actually applied to the respective LEDs 111 with a predetermined reference current amount (S200).

This means that when the LED 111 normally emits light, the amount of current actually applied is the same as the reference current amount. However, when the LED 111 does not normally emit light due to the end of the life or failure of the LED 111, the LED 111 is normal. Since the amount of current applied to the current does not reach the reference amount of current, the difference between the amounts of current is compared to detect LEDs that have failed or have reached the end of their lifetime.

When the controller 180 actually compares the current amount applied to the LED 111 with the reference current amount, and the controller 180 detects an LED 111 ″ to which a current less than the reference current amount is applied among the plurality of LEDs, the controller 180 generates an error. Is determined, and the brightness of the LED 111 'positioned near the error LED 111 "is increased so that the brightness of the LED module 110 reduced by the error LED 111" is increased. Compensation (S300).

That is, the amount of current applied to the LEDs 111 'located at the top, bottom, left, and right positions of the error LED 111 " is increased from the reference current amount so that the reduced brightness of the error LED 111 " ) To compensate for the brightness.

At this time, it is preferable that approximately 70% of the maximum current amount is applied to the LED 111 ′ around the LED 111 ″ where the error occurs.

Therefore, when the LED 111 ″ having a failure or an end of life occurs among the LEDs 111 mounted on the LED module 110, the brightness of the entire LED module 110 may be adjusted by detecting this.

Subsequently, the controller 180 compares whether an error occurrence rate of the LEDs 111 mounted on the LED modules 110 is equal to or greater than a reference error occurrence rate (S400).

Specifically, the number of LEDs 111 'having an error among the plurality of LEDs 111 mounted on each LED module 110 of each LED module 110 corresponds to the number of LEDs mounted on one LED module 110. Compare 5% or more.

As a result of the comparison, when the error occurrence rate of the LED is equal to or greater than a predetermined error occurrence rate, that is, the number of LEDs 111 ″ having errors among the LEDs 111 mounted on the LED module 110 is assigned to one LED module 110. When 5% or more of the total number of LEDs installed, the controller 180 determines that the corresponding LED module is in a bad state, and transmits this information to the operator system 160 through the communication module 170 (S500).

Therefore, the operator system 160 detects a defective LED module 110 that is equal to or higher than a reference error occurrence rate among the plurality of LED modules 110 mounted on the display board, and replaces the defective LED module 110 in a short time. It can be repaired.

According to the present invention, when the LED inside the display board reaches its end of life or fails, the LED module housing is dismantled on the back side of the display board housing to simplify the repair and replacement of the LED.

In addition, the present invention by dividing and mounting a plurality of LED modules on the display board, when replacing or repairing the LED, the need to replace only the LED module containing the problem LED without replacing and repairing the entire LED module to replace the LED And because it can be repaired, there is an effect that can reduce the cost of LED replacement and repair.

In addition, the present invention, if any one of a plurality of LEDs mounted on the LED module is a failure, by detecting the error of the LED to increase the output of the LED around the detected LED, the light on the guide cover sheet of the display board normally This has the effect of being investigated.

In addition, the present invention detects whether or not a defective state according to the error occurrence rate for each LED module and transmits it to the operator system, there is an effect that can be replaced and repair the LED module in which the failure occurred in a short time.

In the above, the present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiments, and those skilled in the art to which the present invention pertains may vary without departing from the spirit of the technical idea of the present invention described in the claims below. It will be possible to carry out the change.

Claims (12)

As an electronic board using an LED module, Sign housing; A front plate attached to the guide cover sheet having letters and symbols formed thereon and installed on the front of the display housing; A plurality of LED modules including a substrate and a plurality of LEDs installed on the substrate, the plurality of LED modules being spaced apart from the rear surface of the display panel housing so that light emitted from the plurality of LEDs irradiates the guide cover sheet; An LED module housing having a predetermined space for accommodating the LED module and inserted into a rear surface of the display housing; A controller configured to turn on / off the LEDs mounted on the LED modules, control the amount of current applied to each LED module, and detect whether the LED module is defective according to the amount of current applied to each LED module; And If a failure of the LED module is detected from the control unit, and includes a communication module for transmitting the detection result to the operator system, The control unit allows a current to be applied to each of the plurality of LEDs, detects an amount of current applied to each of the plurality of LEDs, compares it with a reference current value, detects an error of the LED, and is located around the LED where the error occurs. Control the brightness of the LED module by increasing the amount of current, When an error occurrence rate, which is a ratio of the number of LEDs in which an error occurs among the total number of LEDs mounted on the LED module, reaches a reference error occurrence rate, it is determined that the corresponding LED module is in a bad state, and the determination result is transmitted to the operator system. Electronic board using an LED module, characterized in that. delete delete The method of claim 1, The reference error occurrence rate of the electronic board using an LED module, characterized in that 5 to 15%. The method of claim 1, The LED module housing is an electronic board using an LED module, characterized in that the front surface is mounted so as to interview the front plate. The method of claim 5, The LED module housing is an electronic board using an LED module, characterized in that the front is transparent acrylic. The method of claim 1, The LED module housing is a display board using a LED module, characterized in that a plurality of mounted to be spaced apart a predetermined interval on the back surface of the display panel housing. The method of claim 7, wherein The spaced interval between the LED module housing is a light emitting plate using an LED module, characterized in that spaced apart so that a portion of the light irradiated from the LED module overlaps with a portion of the light irradiated from the neighboring LED module. Claims 1, 4, 5, 6, 7, and 8, as a control method of an electric sign using the LED module, a) driving an LED of the LED module by applying a current equal to a predetermined reference current amount to each LED mounted on the LED module; b) comparing a current amount applied to each LED with a predetermined reference current amount; c) determining that an error has occurred when an LED less than a reference current amount is detected as a result of the comparison, and compensating the brightness of the LED module by increasing the amount of current applied to the LEDs located near the error LED; d) comparing the error occurrence rate and the reference error occurrence rate of the LED mounted in each LED module for each LED module; And and e) determining that the corresponding LED module is in a bad state when the error occurrence rate of the LED is equal to or greater than a preset error occurrence rate, and transmitting the information to an operator system. The method of claim 9, In step a, the reference current amount is a control method of the LED panel using an LED module, characterized in that 50% of the maximum amount of current that can be applied to one of the LED. The method of claim 9, In step c, the amount of current applied to the LED around the error LED is 70% of the maximum amount of current that can be applied to one of the LED sign control method using a LED module. The method of claim 9, In step d, the reference error occurrence rate is a control method of the LED board using an LED module, characterized in that the error rate of the LED of 5 to 15% of the LED mounted on the LED module.

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