US 12,288,510 B1
LED display configuration system for improving grayscale recognition of human visual images
Yi-Yu Tsai, Hsinchu (TW); Shao-Wei Chiu, Hsinchu (TW); and Yin-Cheng Huang, Hsinchu (TW)
Assigned to STARLIGHT DISPLAY CORPORATION, Hsinchu (TW)
Filed by STARLIGHT DISPLAY CORPORATION, Hsinchu (TW)
Filed on Apr. 19, 2024, as Appl. No. 18/639,991.
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2320/0276 (2013.01); G09G 2320/0626 (2013.01); G09G 2360/144 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A light emitting diode (LED) display configuration system, for improving grayscale recognition of human visual images, used in a direct-view LED display screen, comprising:
a pulse-width modulation (PWM) dimming processor, with a brightness range that is adjustable and expressed in percentage;
a Gamma modulation processor, with a plurality of Gamma values provided for selection and modulation;
a grayscale segment compensation processor, electrically coupled to the PWM dimming processor and the Gamma modulation processor, comprising N modulation intervals; and
a switching processor, electrically coupled to the grayscale segment compensation processor, and provided for manually or automatically switching and selecting the N modulation intervals, wherein
N is an integer greater than or equal to 2, and each of the N modulation intervals has a set current and defines the set currents as a first current to an Nth current,
a first modulation interval uses the first current and one of selected Gamma values to output light, and the grayscale segment compensation processor takes X % in the brightness range as a compensation reference value and Y % in the brightness range as a minimum allowable value, and sequentially configures the set currents corresponding to the N modulation intervals respectively according to the same compensation reference value,
in any two adjacent modulation intervals, a maximum brightness outputted by the set current in a next modulation interval is equal to or greater than a brightness outputted at the compensation reference value in a previous modulation interval, so that the set currents corresponding to the N modulation intervals show a power descending relationship,
a brightness outputted at the compensation reference value in the Nth modulation interval is equal to or less than a brightness outputted at the minimum allowable value in the first modulation interval, and
the N modulation intervals use the brightness range of 100%˜X % as a working section.