KR20210043882A - Correcting system for display board of color and brightness - Google Patents

Abstract

The present invention relates to a system for correcting a color and brightness of an electronic display board, which is capable of independently controlling a color and brightness of an adjacent LED according to outdoor lighting or brightness of light. To this end, the system for correcting a color and brightness of an electronic display board according to the present invention comprises: a content providing server configured to provide an image; a control device configured to receive images transmitted from the content providing server and control to output an image selected from among the received images according to a set schedule; a scheduler device configured to provide schedule information input and set to the control device; a media board device configured to display an image output from the control device; and a masking device which is installed between the control device and the media board and is configured to convert an image output from the control device based on a resolution, brightness, and color information received from the scheduler device and transmit the converted image to the media board device.

Description

Display board color and brightness correction system {CORRECTING SYSTEM FOR DISPLAY BOARD OF COLOR AND BRIGHTNESS}

The present invention relates to a display board color and brightness correction system, and more particularly, to a display board color and brightness correction system capable of independently controlling the color and brightness of adjacent LEDs according to outdoor lighting or light brightness.

Media facade is a term that combines media and facade, which means the exterior wall of a building, and means implementing media functions by installing LED lights on the exterior wall of a building. It means to decorate the exterior of a building or use it as a display means using a media, which is an image device such as an image device.

These media facades are used to improve the aesthetics of buildings by attaching light-emitting means such as LED lights to the exterior wall of a building and controlling them to adjust specific color changes or blinking cycles. In addition, it is being developed in a way that uses a liquid crystal display (LCD), a beam projector, or a laser projector.

The media facade using LED lighting includes a panel frame attached to and installed on the exterior of a building, an LED connected to display an image on the panel frame, and a control unit controlling the LED to display an image on the panel frame. When the LEDs are densely arranged as they are installed on the outer wall of a relatively large building, the view from the inside to the outside is blocked by the installed panel frame, and the cost burden of installation increases. It is a situation where the intervals are properly arranged and installed according to the luminance that can be seen well.

Accordingly, as the luminance of the media facade using the LED lighting decreases, the luminance extremely decreases during the day when the luminance is high, so that the display function cannot be performed.

KR 10-2008-0067223 A)2008. 07. 18.)

The present invention was created to solve the problems of the prior art, and the problem to be solved in the present invention is to provide a single resonant converter for simultaneously and independently controlling the brightness and color of two LEDs or two groups of LEDs. It is to provide a color and brightness correction system for the included electronic signboard.

In order to solve the above problems, the electronic display board color and brightness correction system according to the present invention includes a content providing server that provides an image; A control device that receives an image transmitted from the content providing server and controls to output an image selected from the received images according to a set schedule; A scheduler device that provides schedule information input to the control device; Displaying an image output from the control device, the media board device; And a masking device installed between the control device and the media board device, converting the image output from the control device based on the resolution, luminance, and color information received from the scheduler device and transmitting the converted image to the media board device. It is characterized by that.

Here, the media board device includes an image correction unit for correcting the color and brightness signals of adjacent LEDs according to outdoor lighting or light brightness; And a media board for outputting color light according to a signal output through the image corrector.

According to the present invention, there is an advantage of being able to independently control the color and brightness of an image content by independently controlling the color and brightness of adjacent LEDs according to outdoor lighting or light brightness.

In addition, there is an advantage in that image distortion can be prevented by converting and outputting high-resolution video content in accordance with low-resolution video content.

1 is a block diagram of an electric signboard color and brightness correction system according to the present invention.
Figure 2 is a configuration diagram of an image correction unit applied to the color and brightness correction system according to the present invention.
3 is a block diagram of a masking device applied to a color and brightness correction system for an electric signboard according to the present invention.

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

The present invention relates to a display board color and brightness correction system, and more particularly, to a display board color and brightness correction system capable of independently controlling the color and brightness of adjacent LEDs according to outdoor lighting or light brightness.

1 is a diagram showing the configuration of a system for correcting color and brightness of an electric signboard according to the present invention.

Referring to the accompanying FIG. 1, the electronic display board color and brightness correction system according to the present invention includes a content providing server 100, a control device 200, a scheduler device 300, a media board device 400, and a masking device 500. It is configured to include a TV transmission device 600 and a monitoring control device 700.

The content providing server 100 is a device that provides video content displayed on the media board device 400 and provides video content such as DVD, HDMI, DP, or VCR.

The control device 200 receives an image transmitted from the content providing server 100 and controls to output an image selected from the received images according to a set schedule.

Such a control device 200 includes an image transmission unit 210 and a matrix unit 220.

The image transmission unit 210 receives and outputs the image transmitted from the content providing server 100, and is to be displayed on the media board device 400 according to the image content and time information input to the scheduler device 300. Receive and output the video.

The matrix unit 220 performs a function of dividing and reproducing the image output from the image transmission unit 210 in a matrix arrangement, identifying the output position of the image divided in the matrix arrangement, and synchronizing and outputting the playback time. do.

When the media board device for implementing the media facade is installed as a single board, it is installed as a multi-vision that combines several boards because it is difficult not only for cost, but also for transportation, installation, and damage and maintenance for defective pixels. Accordingly, the matrix unit 220 divides the image according to the number of combined multi-visions, gives each divided image and a code for identifying the output position of the media board device on which the corresponding image is output, and divides the image. Synchronizes and outputs the playback time so that the video is simultaneously output to the media board device.

The scheduler device 300 sets an operation plan of an image output to the media board device, and stores and manages time, media board, output, screen setting, brightness control, and output screen.

Here, the output screen corresponds to a setting mode for the output screen, and may be configured of whether to output low-resolution video content, a resolution of high-resolution video content, whether the resolution of low-resolution video content and high-resolution video content match, setting of luminance, and the like. And can be configured to be changed by the user's editing.

For example, since low-resolution video content cannot be displayed in high resolution, the setting mode for the output screen can be classified as follows.

The setting modes for the output screen applied to the color and brightness correction system of the electric signboard according to the present invention are classified into modes 1 to 5 so that the image can be displayed, but it may be more diversely set according to the number and type of media boards. Of course you can.

In the mode 1, low-resolution video content is displayed in a low resolution, and high-resolution video content is displayed in a low resolution, so that the resolutions of the low-resolution video content and the high-resolution video content are matched.

In mode 2, in the case of low-resolution video content, the high-resolution video content displays the video at a low resolution without displaying the video.

In mode 3, in the case of low-resolution video content, the high-resolution video content displays the video in high resolution without displaying the video.

In mode 4, in the case of low-resolution video content, high-resolution video content displays an image in high resolution while a low-resolution video content is displayed, and an image expressed in the low-resolution video content and an image expressed in the high-resolution video content may be configured differently. For example, an advertisement image may be displayed in a low-resolution image content, and a digital television image may be displayed in a high-resolution image content.

In Mode 5, low-resolution video content and high-resolution video content display DVD video.

The schedule stored in the scheduler device 300 is transmitted to the control device 200 and the masking device 500 to be described later, and is used as information for controlling an operation according to a set schedule.

The media board device 400 displays an image output from the control device 200, and outputs color light according to a signal output from the image correction unit 410 and the image correction unit 410 ( 420).

2 is a block diagram of an image correction unit applied to a color and brightness correction system for an electric signboard according to the present invention.

Referring to FIG. 2, the image correction unit applied to the color and brightness correction system of an electric signboard according to the present invention includes a rectifier 411, a converter 412 and a switching circuit 413.

The rectifier 411 performs a function of stabilizing the DC voltage and removing harmonics.

The converter 412 includes an MCU to which two transistors arranged in a half bridge circuit are connected. If necessary, the converter 412 may be configured as a full bridge circuit.

The switching circuit 413 performs a function of adjusting a specific forward voltage of the LED for each of the voltage output through each inductance and the output voltage induced through the center tap and controlling the brightness of each according to the current.

The media board 420 is composed of an LED display panel supporting a resolution of 1024×768 or higher.

In such a configuration of the media board device 400, in order to match video content having different resolutions according to the low resolution and high resolution, the high resolution video content must be converted to a low resolution. It can be divided into a method of using the configured resolution variable module and a method of varying the resolution of image content input to the media board.

The method of using the resolution variable module has a problem in that a module for varying the resolution must be configured on the media board, and this must be changed remotely from time to time. Therefore, in the present invention, a method of varying the image content input to the media board is applied.

Accordingly, in the present invention, a masking device 500 for converting the resolution of image content between the control device 200 and the media board device 400 is configured.

The masking device 500 is installed between the control device 200 and the media board device 400, and is output from the control device 200 based on the resolution, luminance, and color information received from the scheduler device 300. Converts an image and transmits it to the media board device 400.

The masking device 500 separates low-resolution video content and high-resolution video content according to a schedule set in the scheduler device 300, and converts and provides video content transmitted to the media board device 420.

3 is a diagram showing a configuration diagram of a masking device applied to a color and brightness correction system for an electric signboard according to the present invention.

3, the masking device 500 includes an input interface 501, a luminance/color conversion unit 502, a frame memory unit 503, a masking unit 504, a format converter unit 505, and It is configured to include an output interface 506.

The input interface 501 receives and outputs an image output from the control device.

The luminance/color conversion unit 502 performs a function of converting a luminance value and a color value for each pixel in an image input through the input interface into a luminance value and a color value input to the scheduler device.

Here, the luminance correction of the image is calculated by comparing the reference luminance of the image content with the luminance input to the scheduler device, calculating the corrected current value applied to the LED so that the reference luminance of the image content and the luminance input to the scheduler device match. Based on the current value, the current value supplied when the LED is turned on is changed to the corrected current value.

In addition, the color correction is based on the corresponding PWM (pulse width modulation) signal when driving the R, G, B LED of the media board, according to the color value transmitted from the scheduler device 300, the current amplitude of the PWM signal. It is done under control.

If necessary, the luminance can be operated in an automatic correction method and a manual correction method.

For example, the luminance of an image displayed on the media board device 400 is related to the illuminance caused by sunlight. That is, when the peripheral illumination of the media facade by sunlight is high, the luminance of the image displayed by the media board device 400 must also increase to increase the image identification power.

Accordingly, the automatic luminance correction method can be applied in such a manner that the peripheral illuminance value of the media facade is detected using an illuminance sensor, and the brightness of the image is corrected according to the detected illuminance value.

In addition, the manual correction method is a method in which the luminance of an image is corrected according to a set value input by a user, and the input set values may include time and luminance values. That is, it may be configured to be expressed as an input luminance value according to a change of time.

The frame memory unit 503 stores the image input through the input interface in units of frames.

The masking unit 504 performs a function of converting the image converted by the luminance/color conversion unit into a resolution input to the scheduler device based on the frame image stored in the frame memory 503.

Here, since the low-resolution video content cannot be displayed in accordance with the resolution of the high-resolution video content, the high-resolution video content is matched with the resolution of the low-resolution video content to display the video.

In this case, in order to match the resolution of the high-resolution video content with the resolution of the low-resolution video content, a portion of the video content is masked and not displayed.

That is, the image resolution correction allows the pixels of the image content to be displayed for the vertical and horizontal pixels of the high-resolution image content that match the vertical and horizontal pixels of the low-resolution image content, and the high-resolution image that does not match the vertical and horizontal pixels of the low-resolution image content. Pixels of image content with respect to vertical and horizontal pixels of the content are configured to be masked.

For example, if the resolution of the high-resolution image content is corrected to a low resolution that is reduced by 10 times, the first pixel in the vertical line of the image content displayed in the high-resolution image content is displayed, and the second to tenth pixels are masked. , The 11th pixel is exposed, and the 12th to 20th pixels are masked. Similarly, the horizontal line is configured to be expressed or masked in the same way as the vertical line.

With the configuration of the masking unit 504 as described above, since the image content is masked and output, the image content can be displayed in a low resolution, so that even if the media board is replaced, low-resolution video content and high-resolution video content without changing the settings of the media board In addition to being able to match the resolution of video content, there is an advantage in that various video content such as RGB, DVD, DP, and HDMI can be displayed at a set resolution.

The format converter 505 performs a function of converting the format form of the video content received through the input interface into an output format of the media board device.

That is, the format converter unit 505 converts the horizontal/vertical size or ratio of the video content into a ratio of the horizontal/vertical size of the media board.

The output interface 506 outputs the image output from the masking unit to the divided media board based on the format stored in the format converter unit.

The TV transmission device 600 receives digital television images and transmits them to the control device.

The monitoring and control device 700 detects a camera for photographing an image displayed on the media board device 400 or a current applied to the media board device 400, and whether the LED constituting the media board device 400 is turned on. Is detected, and the monitoring result for the detected result is transmitted to an external device.

According to the present invention, there is an advantage of being able to independently control the color and brightness of video content by independently controlling the color and brightness of adjacent LEDs according to outdoor lighting or light brightness.

In addition, there is an advantage in that image distortion can be prevented by converting and outputting high-resolution video content in accordance with low-resolution video content.

Although the preferred embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and it should be understood that the scope of the present invention extends to the scope substantially equal to the embodiment of the present invention. Various modifications may be made by those of ordinary skill in the technical field to which the present invention pertains within the scope not departing from the spirit of the invention.

100: content providing server 200: control device
300: scheduler device 400: media board device
410: image correction unit 420: media board
500: masking device 510: first masking device
520: second masking device 600: TV transmission device
700: monitoring control device

Claims (2)

A content providing server that provides an image;
A control device that receives an image transmitted from the content providing server and controls to output an image selected from the received images according to a set schedule;
A scheduler device that provides schedule information input to the control device;
Displaying an image output from the control device, the media board device; And
A masking device installed between the control device and the media board device, converting an image output from the control device based on the resolution, luminance, and color information received from the scheduler device and transmitting the converted image to the media board device;
An electric signboard color and brightness correction system comprising a.
The method according to claim 1,
The media board device,
An image correction unit for correcting the color and brightness signals of adjacent LEDs according to outdoor lighting or light brightness; And
And a media board for outputting color light according to a signal output through the image corrector.

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