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US 2022/0027113 A1Published application
Apparatus and method for controlling automatic color calibration of a video wall
AssigneeHyundai It Co., Ltd.
InventorsYong Tae KIM, Yong Seog KIM
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Abstract
The present invention relates to an apparatus and method for controlling automatic color calibration of a video wall by smoothly displaying an entire video on the video wall and improving user visibility. The automatic color calibration apparatus comprises a control unit configured to output the number of the plurality of video boards constituting the video wall to the display unit and store the number in a storage unit according to operation signals from the user input unit, and perform automatic color calibration for the plurality of video boards.
Claims4
An automatic color calibration apparatus of a video wall comprising:
- a signal line connection unit configured to transmit and receive data signals to and from a PC and a video wall including a plurality of video boards interconnected in a closed-loop daisy chain;
- a display unit;
- a user input unit including a plurality of user setting buttons;
- and
- a control unit configured to output the number of the plurality of video boards constituting the video wall to the display unit and store the number in a storage unit according to operation signals from the user input unit, and perform automatic color calibration for the plurality of video boards,
- wherein the control unit comprises:
- a dimming control unit configured to sequentially receive the illuminance sensor values from the plurality of video boards through the signal line connection unit to store them in the storage unit, determine SET ID of the video board having the lowest illuminance sensor value and the illuminance sensor value with the lowest brightness, compare the determined illuminance sensor value of the lowest brightness with the illuminance sensor values of the other video boards, and output SET ID and corresponding data to control the backlight brightness to each of the plurality of video boards through the signal line connection unit so that the backlight brightness of the other video boards match that of the video board with the lowest brightness;
- and
- a contrast ratio control unit configured to sequentially receive 100% WHITE brightness values from the plurality of video boards to store them in the storage unit, determine the SET ID of the video board having the lowest brightness value and the brightness value of the lowest brightness, calculate the differences between the determined lowest brightness value and the brightness values of the other video boards, and outputs the SET ID and corresponding data to control the contrast value to each of the plurality of video boards so that all of the plurality of video boards have a uniform contrast value.
6 more elements
An automatic color calibration method of a video wall comprising:
- storing the number of a plurality of video boards interconnected in a closed-loop daisy chain to constitute the video wall in a storage unit according to setting button signal;
- in response to the input of the “START” command for automatic color calibration for the plurality of video boards, sequentially receiving the illuminance sensor values from each of the plurality of video boards to store them in the storage unit, and determining SET ID of the video board having the lowest illuminance sensor value and the illuminance sensor value of the lowest brightness;
- comparing the determined illuminance sensor value of the lowest brightness with the illuminance sensor values of the other video boards and outputting SET ID of video board and corresponding data to control the backlight brightness to each of the plurality of video boards so that the backlight brightness values of the other video boards match that of the video board with the lowest brightness;
- sequentially receiving the 100% WHITE brightness values from the plurality of video boards to store them in the storage unit, and determining the SET ID of the video board device having the lowest brightness value and the brightness value of the lowest brightness;
- calculating the differences between the determined lowest brightness value and the brightness values of the other video boards, and outputting the SET ID and the corresponding data to control the contrast value to each of the plurality of video boards so that all of the plurality of video boards have a uniform contrast value.
2 more elements
Dependencies are inferred from the claim text.