Patent ID: 11908369
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The contrast enhancement device of claim 3, wherein the analysis circuit determines:
the low gray input luminance value using equation: IN_LOW=Y_AVG/2;
the middle gray input luminance value using equation: IN_MID=Y_AVG;
the high gray input luminance value using equation: IN_HIGH=(Y_MAX−Y_AVG)/2+Y_AVG;
the low gray output luminance value using equation: OUT_LOW=IN_LOW−|(Y_LOW−IN_LOW)|;
the middle gray output luminance value using equation: OUT_MID=IN_MID; and
the high gray output luminance value using equation: OUT_HIGH=IN_HIGH+|(Y_HIGH−IN_HIGH)|,
wherein IN_LOW represents the low gray input luminance value, IN_MID represents the middle gray input luminance value, IN_HIGH represents the high gray input luminance value, Y_AVG represents the average luminance value, Y_LOW represents the low gray luminance value, Y_HIGH represents the high gray luminance value, Y_MAX represents a maximum luminance value, OUT_LOW represents the low gray output luminance value, OUT_MID represents the middle gray output luminance value, and OUT_HIGH represents the high gray output luminance value.