Optical compensation device, display device, method of optically compensating display device, and electronic apparatus including display device

A method of optically compensating a display device, the method comprising:

• measuring a first transmission luminance of a transmission area of the display device when a light source of an optical sensor, which overlaps the transmission area, does not emit light;
• determining a first transmission reference gamma voltage which affects the first transmission luminance off the transmission area;
• measuring a second transmission luminance of the transmission area when the light source emits light;
• and
• determining a second transmission reference gamma voltage which affects the second transmission luminance off the transmission area,
• wherein the transmission area transmits external light, and
• the determining the first transmission reference gamma voltage includes:
• storing the first transmission reference gamma voltage in a state in which a difference between the first transmission luminance and a neighboring luminance of a neighboring area neighboring the transmission area is within a reference range, and
• changing the first transmission reference gamma voltage in a state in which the difference between the first transmission luminance and the neighboring luminance is not within the reference range, and
• the determining the second transmission reference gamma voltage includes:
• storing the second transmission reference gamma voltage in a state in which a difference between the second transmission luminance and the neighboring luminance is within the reference range, and
• changing the second transmission reference gamma voltage in a state in which the difference between the second transmission luminance and the neighboring luminance is not within the reference range.

An electronic apparatus including a display device which displays an image and a host processor which provides image data to the display device, the display device comprising:

• a display panel including a normal area which is a non-transmission area and a transmission area which transmits external light;
• an optical sensor overlapping the transmission area and including a light source;
• a gamma voltage generator which generates a first transmission gamma voltage based on a first transmission reference gamma voltage which affects a first transmission luminance of the transmission area determined when the light source does not emit light, and generates a second transmission gamma voltage based on a second transmission reference gamma voltage which affects a second transmission luminance off the transmission area when the light source emits light;
• and
• a data driver which converts the image data for the transmission area into a data voltage for the transmission area based on the first transmission gamma voltage and the second transmission gamma voltage, and applies the data voltage for the transmission area to the transmission area,
• wherein the first transmission reference gamma voltage is stored in a state in which a difference between the first transmission luminance of the transmission area and a neighboring luminance of a neighboring area neighboring the transmission area is within a reference range, and the first transmission reference gamma voltage is changed in a state in which the difference between the first transmission luminance and the neighboring luminance is not within the reference range, and
• the second transmission reference gamma voltage is stored in a state in which a difference between the second transmission luminance of the transmission area and the neighboring luminance is within the reference range, and the second transmission reference gamma voltage is changed in a state in which the difference between the second transmission luminance and the neighboring luminance is not within the reference range.