KR101385264B1 - Power saving control system and method for led electronic sign - Google Patents

Abstract

The present invention relates to a system and a method of controlling power saving in an LED electronic display board. The system of controlling the power saving in the LED electronic display board according to the present invention includes a display unit having a plurality of pixels formed by red, green, blue, and white LEDs; an LED driving unit including a red LED driving module for driving the red LED, a green LED driving module for driving the green LED, a blue LED driving module for driving the blue LED, and a white LED driving module for driving the white LED; and a data converting unit for outputting white data to the white LED driving module if the white data are generated by using red, green, and blue data, and for outputting red, green, and blue data to the red, green, and blue LED driving modules, respectively, if the white data are not generated, thereby saving power consumption. [Reference numerals] (412) Red data input terminal; (414) Green data input terminal; (416) Blue data input terminal; (422) Red data correcting module; (424) Green data correcting module; (426) Blue data correcting module; (430) Data converting unit; (442) Red LED; (444) Green LED; (446) Communication unit; (448) White LED; (452) Red LED driving module; (454) Green LED driving module; (456) Blue LED driving module; (458) White LED driving module; (460) Driving ratio setting unit

Description

LED display power saving control system and method {Power saving control system and method for LED electronic sign}

The present invention relates to a LED signboard power saving control system and method, and more particularly to a LED signboard power saving control system and method for reducing the power consumption of the LED sign.

In general, the LED light source has low power consumption, long life, can be installed in a narrow space, and provides vibration resistance. Nowadays, electronic signboards using these LED light sources are widely used, and the functions are continuously improved to enable not only text but also images and full color representation.

On the other hand, LED signboards generally express full color using red LEDs, green LEDs, and blue LEDs. Such a full color LED sign controller is described in Korean Patent Publication No. 2010-0095836.

However, since only the red LED, the green LED, and the blue LED of Korean Patent Application Publication No. 2010-0095836 drive full colors to express full color, unnecessary power consumption occurs when white is expressed, and the desired white color is not expressed due to unstable RGB coordinate color coordinates. Cases often occurred.

Patent Document 1: Korean Patent Publication No. 2010-0095836

In order to solve the above problems, an object of the present invention is to provide an LED display panel power control system and method for reducing the power consumption of the LED display panel.

In order to achieve the above object, the LED signboard power control system according to an embodiment of the present invention is a display unit having a plurality of pixels consisting of a red LED, a green LED, a blue LED and a white LED, and the red LED LED having a red LED driving module for driving, a green LED driving module for driving the green LED, a blue LED driving module for driving the blue LED, and a white LED driving module for driving the white LED If white data is generated using the driver, the input red data, green data, and blue data, white data is output to the white LED driving module. If white data is not generated, red data, green data, and blue Data for outputting data to the red LED driving module, the green LED driving module, and the blue LED driving module, respectively. Provide the affected area.

The data converter includes an FPGA DSP and may output only white data when the input red data, green data, and blue data are all the same or within a predetermined range.

The data converter may reduce red data, green data, and blue data input according to time or ambient brightness.

The LED billboard reduction power control system may further include a timer for providing a time of day or an ambient brightness detector for detecting ambient brightness.

The LED billboard reduction power control system may further include a driving ratio setting unit for setting a driving ratio according to the brightness according to the driving current of the red LED, the green LED, the blue LED, and the white LED.

The display unit may be divided into four equal parts around the center for arranging LEDs for one pixel, and one red LED, one green LED, one blue LED, and one white LED may be disposed for each equal division.

The display unit may include a red LED, a green LED, and a blue LED as a lamp type, and a white LED of a chip type may be disposed on each of left and right sides of the lamp type.

According to another embodiment of the present invention, a power control method of an LED signboard including a plurality of pixels including a red LED, a green LED, a blue LED, and a white LED may include receiving red data, green data, and blue data, respectively. And outputting white data when white data is generated using the input red data, green data, and blue data, and outputting red data, green data, and blue data when white data is not generated. The above object can be achieved by providing driving of the red LED, the green LED, the blue LED, and the white LED, respectively, according to the output red data, green data, blue data, and white data.

With the above-described configuration, the present invention can actually save a considerable amount of power consumption by expressing the brightness as white instead of white by the combination of red, green and blue in the case of white.

In addition, the present invention can reduce the power consumption that may occur by displaying an unnecessary bright image by adjusting the data on the brightness in accordance with the ambient brightness.

In addition, according to the present invention, by setting the driving time differently according to the color LED brightness difference, not only the distortion according to the color coordinates can be reduced, but also the power consumption can be reduced by reducing unnecessary driving time.

1 is a diagram illustrating an arrangement of LED light sources according to an embodiment of the present invention.
2 is a view showing the arrangement of the LED light source according to another embodiment of the present invention.
3 is a view showing an LED display power control system according to an embodiment of the present invention.
4 is a block diagram of the LED display saving power control apparatus according to an embodiment of the present invention.
FIG. 5 is a block diagram of an LED display reduction power control device according to another embodiment of the present invention.
6 is a flowchart illustrating a method for controlling power saving of LED display board according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the LED signboard power saving system and method according to the present invention. In the following description of the present invention, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the technical scope of the present invention. Will be.

1 is a diagram illustrating an arrangement of LED light sources according to an embodiment of the present invention.

As shown in FIG. 1, one pixel 100 of the LED signboard is, for example, red LED 110, green LED 120, blue LED 130 and white LED 140 to achieve full color. And all may be arranged in a lamp type. Here, the white LED 140 may reduce power consumption by expressing white instead of white by the combination of the red LED 110, the green LED 120, and the blue LED 130, or the red LED 110, the green LED. By expressing white with the combination of LED 120 and blue LED 130, the brightness of the illumination can be increased.

2 is a view showing the arrangement of the LED light source according to another embodiment of the present invention.

As shown in FIG. 2, one pixel 200 of the LED signboard is, for example, a red LED 210, a green LED 220, a blue LED 230, and a first white LED 240 to realize full color. And a second white LED 250, different from FIG. 1, the red LED 210, the green LED 220, and the blue LED 230 are disposed in a lamp type, and the first white LED 240 and The second white LED 250 may be disposed in a chip type on both sides of one of the red LED 110, the green LED 120, and the blue LED 130.

3 is a view showing an LED display power control system according to an embodiment of the present invention.

As shown in FIG. 3, the LED billboard power control system includes a personal computer (PC) 310, a monitor 320, and an LED billboard reduction power control device 330.

The personal computer 310 transmits an image including not only text but also an image to the LED signboard power saving device 330 as a digital visual interface (DVI) signal.

The monitor 320 may display not only an image displayed on the sign of the LED sign saving power control device 330, but also a menu screen for setting the LED sign saving power control device 330.

The LED display reduction power control device 330 controls the LED power from the input DVI signal to display on the LED display. Hereinafter, the LED power control device 330 will be described in more detail.

4 is a block diagram of the LED display saving power control apparatus according to an embodiment of the present invention.

As shown in FIG. 4, a DVI input unit 410, a data correction unit 420, a data converter 430, a display unit 440, an LED driver 450, and a driving ratio setting unit 460 are included. .

The DVI input unit 410 has a red data input terminal 412, a green data input terminal 414, and a blue data input terminal 416 for inputting red data, green data, and blue data transmitted from the personal computer 310, respectively. It includes.

The data compensator 420 may include 8 bits of red data, green data, and blue data input to the red data input terminal 412, the green data input terminal 414, and the blue data input terminal 416, respectively. And a red data correction module 422, a green data correction module 424, and a blue data correction module 426, which each correct with 12 bits of data using gamma tables of bits.

The data converter 430 may include an FPGA DSP. When the white data is generated using the 12-bit red data, the green data, and the blue data corrected by the data corrector 420, the 12-bit white data is generated. If the white data is not generated, 12 bits of red data, green data, and blue data are output as they are.

That is, the data converter 430 outputs 12 bits of red data, green data, and blue data as 0 when the 12 bits of red data, green data, and blue data are expressed in white by combining the same or almost the same values. And only white data is output.

As described above, according to the present invention, the data converter 430 may reduce the amount of power consumption by actually expressing the brightness of the white color instead of the white color by the combination of red, green, and blue. have.

The display unit 440 is actually a display portion of the display board and includes a plurality of pixels including a red LED 442, a green LED 444, a blue LED 446, and a white LED 448.

The LED driver 450 drives the red LED driving module 452 for driving the red LED 442, the green LED driving module 454 for driving the green LED 444, and the blue LED 446. A blue LED driving module 456 and a white LED driving module 458 for driving the white LED 448.

The driving ratio setting unit 460 is a configuration for setting the driving ratio of the red LED 442, the green LED 444, the blue LED 446, and the white LED 448. In the case of red LED 442, green LED 444, blue LED 446, and white LED 448, which are displayed as an image on the electronic board, when driven with the same current, the brightness is not actually the same according to each color. Is different. In other words, the LED, which is a component of the electronic signboard, changes the luminance characteristics of red, green, and blue LEDs according to temperature. Increasing increases the luminance value. Therefore, the present invention not only corrects these characteristics of the LEDs by setting the drive ratio setting unit 460, but also fundamentally prevents the problems caused by seasonal changes by using white LEDs.

As described above, the present invention includes a driving ratio setting unit 460, which not only reduces distortion according to color coordinates, but also reduces power consumption by reducing unnecessary driving time.

FIG. 5 is a block diagram of an LED display reduction power control device according to another embodiment of the present invention.

As shown in FIG. 5, the DVI input unit 410, the data correction unit 420, the data converter 530, the display unit 540, the LED driver 550, the drive ratio setting unit 560, and the timer unit 570, an ambient brightness detector 580, and a controller 590.

The DVI input unit 410 has a red data input terminal 412, a green data input terminal 414, and a blue data input terminal 416 for inputting red data, green data, and blue data transmitted from the personal computer 310, respectively. It includes.

The data corrector 420 gammas 12 bits of 8 bits of red data, green data, and blue data input to the red data input terminal 412, the green data input terminal 414, and the blue data input terminal 416, respectively. The tables are used to correct each of 12 bits of data.

The data converter 530 outputs 12 bits of white data when white data is generated using 12 bits of red data, green data, and blue data, and 12 bits of red data when white data is not generated. , Green data and blue data are output as they are.

That is, the data converter 530 outputs 12-bit red data, green data, and blue data as 0 when the 12-bit red data, green data, and blue data are expressed in white by combining the same or almost the same values. And only white data is output.

As described above, the present invention can actually reduce a considerable amount of power consumption by expressing the brightness as white instead of white by the combination of red, green, and blue in the case of white by the data converter 530. have.

In addition, the data converter 530 may change the input 12-bit red data, green data, and blue data based on the time of the timer 570 or the detection value of the ambient brightness detector 580. For example, the data converter 530 may be designed to output 12 bits of red data, green data, and blue data which are input based on the brightest state. In this case, the data converter 530 subtracts 12 bits of red data, green data, and blue data by the data input from the controller 590 according to the situation, and then outputs the data according to the situation.

As described above, according to the present invention, the data converter 530 may reduce power consumption that may be caused by displaying an unnecessarily bright image by adjusting data regarding brightness according to ambient brightness.

The display unit 540 is actually a display portion of the display board, and includes a red LED 542, a green LED 544, a blue LED 546, a first white LED 548-1, and a second white LED 548-2. It consists of a plurality of pixels.

The LED driver 550 drives the red LED driving module 552 for driving the red LED 542, the green LED driving module 554 for driving the green LED 544, and the blue LED 546. A blue LED driving module 556, a first white LED driving module 558-1 for driving the first white LED 548-1, and a second white LED 548-2 for driving the first white LED 548-1; Two white LED drive modules 558-2.

The driving ratio setting unit 560 sets the driving ratio of the red LED 542, the green LED 544, the blue LED 546, the first white LED 548-1, and the second white LED 548-2. It is a configuration for. The red LED 542, the green LED 544, the blue LED 546, the first white LED 548-1, and the second white LED 548-2, which are displayed as images on the electronic sign, are driven by the same current. In this case, the brightness is not actually the same for each color, rather than the same brightness. To improve this, for example, when the data values are the same, the green LED 544 and the blue LED 546 may set the driving ratio such that the LED driving time is set to a predetermined percentage or less compared to the red LED 542. .

As described above, the present invention includes a driving ratio setting unit 560, which not only reduces distortion due to color coordinates, but also reduces power consumption by reducing unnecessary driving time.

The timer unit 570 is configured to check the time, such as day and night. The controller 590 sets the brightness data output to the data converter 530 as 0 when the day time is input from the timer 570, and outputs the data to the data converter 530 when the night time is input. The brightness data is changed to a predetermined value.

The ambient brightness detector 580 detects the ambient brightness of the LED sign saving power control device. To this end, the peripheral brightness detector 580 may include a CDS sensor. The controller 590 controls the ambient brightness detector 580 to sample 60 times per second, averages the values, and outputs the brightness data changed in accordance with Vsync to the data converter 530.

As described above, according to the present invention, the brightness of the display board may be reduced by using the time of the timer 570 or the detection value of the ambient brightness detector 580, thereby reducing power consumption.

The controller 590 may control setting values of the driving ratio setting unit 560 as well as output of brightness data to the data converter 530. For example, when the LED sign saving power control device is used for lighting rather than the sign board, the set values of the driving ratio setting unit 560 may be all set to one.

In FIG. 4, only one white LED is disposed in one pixel as illustrated in FIG. 1, but in FIG. 5, two white LEDs are disposed in one pixel as illustrated in FIG. 2. In the case of using two white LEDs as shown in Figure 5 can be used as a signboard in normal use, if necessary, for example, if you need to use for the playground lighting can provide a considerable brightness.

6 is a flowchart illustrating a method for controlling power saving of LED display board according to an embodiment of the present invention.

The flowchart of FIG. 6 will be described based on the block diagram shown in FIG. 5.

The DVI input unit 410 receives red data, green data and blue data transmitted from the personal computer, respectively (S602).

The data corrector 420 gammas 12 bits of 8 bits of red data, green data, and blue data input to the red data input terminal 412, the green data input terminal 414, and the blue data input terminal 416, respectively. Each table is corrected with 12 bits of data using the tables (S604).

The controller 590 outputs ambient brightness data associated with each color to the data converter 530 in accordance with Vsync according to the time of the timer 570 or the detection value of the ambient brightness detector 580 (S606).

The data converter 530 outputs 12 bits of white data when white data is generated using 12 bits of red data, green data, and blue data, and 12 bits of red data when white data is not generated. The green data and the blue data are output as they are (S608). In this case, the data converter 530 may change the 12-bit red data, green data, and blue data input based on the time of the timer 570 or the detection value of the ambient brightness detector 580.

The driving ratio setting unit 560 sets the driving ratio of the red LED 542, the green LED 544, the blue LED 546, the first white LED 548-1, and the second white LED 548-2. The driving time is adjusted accordingly (S610).

The LED driver 550 may include a red LED 542, a green LED 544, a blue LED 546, a first white LED 548-1, and a second white LED according to output data of the driving ratio setting unit 560. 548-2 is driven (S612).

The embodiments of the present invention described above are merely illustrative of the technical idea of the present invention, and the scope of protection of the present invention should be interpreted according to the claims. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims. It should be interpreted that it is included in the scope of right.

100: pixel 110: red LED
120: green LED 130: blue LED
140: white LED 310: personal computer
320: monitor 330: LED sign saving power control device
410: DVI input unit 420: data correction unit
430: data conversion unit 440: display unit
450: LED driver 460: drive ratio setting unit
570: timer unit 580: ambient brightness detection unit
590:

Claims (10)

A display unit including a plurality of pixels including a red LED, a green LED, a blue LED, and a white LED;
A red LED driving module for driving the red LED, a green LED driving module for driving the green LED, a blue LED driving module for driving the blue LED, and a white LED driving module for driving the white LED. LED driver having a,
If white data is generated using the input red data, green data, and blue data, white data is output to the white LED driving module; and if white data is not generated, the red data, green data, and blue data And a data converter configured to output a red LED driving module, the green LED driving module, and the blue LED driving module, respectively.
The display unit is a lamp type of red LED, green LED and blue LED is arranged, and one of the left and right of each one of the LED signboard power saving control system, characterized in that the LED type is disposed. The method of claim 1,
The data converter includes an FPGA DSP and outputs only white data when the input red data, green data, and blue data are all the same or within a predetermined range. 3. The method according to claim 1 or 2,
The data conversion unit LED power saving power control system, characterized in that for reducing the red data, green data and blue data input according to the time or ambient brightness. The method of claim 3,
LED display board power saving system further comprises a timer for providing a time of day or an ambient brightness detector for detecting the ambient brightness. 3. The method according to claim 1 or 2,
And a driving ratio setting unit for setting a driving ratio according to brightness of the red LED, the green LED, the blue LED, and the white LED. 3. The method according to claim 1 or 2,
The display unit is divided into four equal to the center of the center for LED arrangement for one pixel, LED red light saving power control system, characterized in that one red LED, green LED, blue LED and white LED is arranged for each equal division . delete A power control method of an LED display board having a plurality of pixels consisting of a red LED, a green LED, a blue LED, and a white LED,
Receiving red data, green data and blue data, respectively,
Outputting white data when white data is generated using the input red data, green data, and blue data, and outputting red data, green data, and blue data when white data is not generated;
Driving the red LED, the green LED, the blue LED, and the white LED according to output red data, green data, blue data, and white data, respectively.
The red LED, the green LED, and the blue LED are disposed in a lamp type, and one of the left and right sides of the LED display board, characterized in that the LED-type white LED is disposed. 9. The method of claim 8,
The outputting of the red data, green data, blue data, and white data may include reducing red data, green data, and blue data input according to time or ambient brightness. 10. The method according to claim 8 or 9,
And after the outputting the red data, the green data, the blue data, and the white data, setting the driving ratio according to the brightness according to the driving current of the red LED, the green LED, the blue LED, and the white LED. LED signage, characterized in that the power control method.

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