Patent ID: 11967608
Assignee: DONGBANG DATA TECHNOLOGY CO., LTD
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 3:
4. The PIS distributed type automatic power-saving electronic display board according to claim 3, wherein the PIS Power saving Controller further comprises: a histogram equalizer configured to equalize, the image signal in which the image data stored in the frame memory on a frame-by-frame basis is synchronized and generated by the gamma controller and applied to the histogram equalizer, by expressing, as a function, a ratio of the image signal to the number of pixels, and making contrast value distribution uniform to divide contrast values concentrated on one spot to thereby set an image reference value of a gamma value; a gain controller configured to histogram-equalize the image data stored in the frame memory and inputted thereto to set the value of the current flowing through the LED, and allows the gain controller to compare the set current value with the difference between the image reference value of the gamma controller and the correction value of the histogram-equalized image and determine and perceive the change in the subtraction loss value based on the power consumption difference of the display image in consideration of image quality change, brightness, and image size; and a PIS controller configured to allow the histogram equalizer to histogram-equalize the image data inputted thereto to set the value of the current flowing through the LED, and allow the gain controller to compare the set current value with the difference between the image reference value of the gamma controller and the correction value of the histogram-equalized image and determine the change in the subtraction loss value based on the power consumption difference of the display image in consideration of image quality change, brightness, and image size to designate the current value for display on the electronic display board and transmit the determined information so as to control the power-saving operation of the LED module to be performed.