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

Claim 2:
3. The contrast enhancement device of claim 2, wherein:
the analysis circuit calculates an average luminance value of the luminance values of the input data,
when the average luminance value is lower than a first reference average luminance value, the analysis circuit determines:
the low gray luminance value by calculating an average value of the luminance values lower than a first reference middle luminance value;
the middle gray luminance value as the first reference middle luminance value; and
the high gray luminance value by calculating an average value of the luminance values higher than the first reference middle luminance value,

when the average luminance value is higher than or equal to the first reference average luminance value and is lower than a second reference average luminance value, the analysis circuit determines:
the low gray luminance value by calculating an average value of the luminance values lower than a second reference middle luminance value;
the middle gray luminance value as the second reference middle luminance value; and
the high gray luminance value by calculating an average value of the luminance values higher than the second reference middle luminance value, and

when the average luminance value is higher than or equal to the second reference average luminance value, the analysis circuit determines:
the low gray luminance value by calculating an average value of the luminance values lower than a third reference middle luminance value;
the middle gray luminance value as the third reference middle luminance value; and
the high gray luminance value by calculating an average value of the luminance values higher than the third reference middle luminance value.