Method for controlling display

摘要

A method for controlling a display is provided. An RGB video signal is transformed into an RGBW video signal based on a human factor. The display has a plurality of pixels configured to display images according to the RGBW video signal, where each of the pixels has a red subpixel, a green subpixel, a blue subpixel and a white subpixel. According to the method, when brightness of a backlight module of the display is reduced to decrease energy consumption of the display, quality of the images of the display observed by users is still maintained within an acceptable range.

主权项

1. A method for controlling a display, the method comprising:
the display receiving an image signal of a group of pixels, the group of pixel comprising a plurality of pixels; respectively transforming a red data value, a green data value and a blue data value of each of the pixels into a red brightness value, a green brightness value and a blue brightness value of the each of the pixels; setting a maximum of the red brightness values, the green brightness values and the blue brightness values of the pixels as a maximum brightness value, and setting a minimum of the red brightness values, the green brightness values and the blue brightness values of the pixels as a minimum brightness value; obtaining a saturation value according to the maximum brightness value and the minimum brightness value; transforming the saturation value into a boundary brightness value according to a human factor; obtaining a mapping ratio according to the boundary brightness value and the maximum brightness value; respectively multiplying the red brightness value, the green brightness value and the blue brightness value of each of the pixels by the mapping ratio to obtain a red mapping brightness value, a green mapping brightness value and a blue mapping brightness value of the each of the pixels; dividing a minimum of the red mapping brightness value, the green mapping brightness value and the blue mapping brightness value of the each of the pixels by an adjustment parameter to obtain a white transformation brightness value of the each of the pixels; respectively subtracting the white transformation brightness value of the each of the pixels from the red mapping brightness value, the green mapping brightness value and the blue mapping brightness value of the each of the pixels to obtain a red transformation brightness value, a green transformation brightness value and a blue transformation brightness value of the each of the pixels; obtaining a red output brightness value, a green output brightness value, a blue output brightness value and a white output brightness value of the each of the pixels by respectively determining whether the red transformation brightness value, the green transformation brightness value, the blue transformation brightness value and the white transformation brightness value of the each of the pixels are greater than a threshold; respectively transforming the red output brightness value, the green output brightness value, the blue output brightness value and the white output brightness value of the each of the pixels into a red output data value, a green output data value, a blue output data value and a white output data value of the each of the pixels; and the display displaying the each of the pixels according to the red output data value, the green output data value, the blue output data value and the white output data value of the each of the pixels.