Abstract: An optical film includes a rough surface having multiple measuring points constituting multiple virtual measuring planes in a given unit measuring area. A normal to each virtual measuring plane has an angle with a normal to a reference plane. On the reference plane, the projection area of the virtual measuring planes having the angle larger than 20 degrees ranges from 31% to 60% of the projection area of the given unit measuring area. The projection area of the virtual measuring planes having the angle larger than 50 degrees is less than 7% of the projection area of the given unit measuring area. 25% of the measuring points has the height larger than a first height. 75% of the measuring points has the height larger than a second height. The first height and the second height have a difference not less than 0.6 ?m and not larger than 2.5 ?m.

Abstract: A display device includes a display module and an anti-glare film on the display module. The anti-glare film includes a first anti-glare layer and a second anti-glare layer. The first anti-glare layer has a plurality of microstructures at an upper surface of the first anti-glare layer. A root-mean-square slope of the microstructures is more than 0 and is 0.2 or less. The second anti-glare layer is between the first anti-glare layer and the display module, and an inner haze of the second anti-glare layer is from 20% to 90%.

Abstract: An optical film includes a rough surface having multiple measuring points constituting multiple virtual measuring planes in a given unit measuring area. A normal to each virtual measuring plane has an angle with a normal to a reference plane. On the reference plane, the projection area of the virtual measuring planes having the angle larger than 20 degrees ranges from 31% to 60% of the projection area of the given unit measuring area. The projection area of the virtual measuring planes having the angle larger than 50 degrees is less than 7% of the projection area of the given unit measuring area. 25% of the measuring points has the height larger than a first height. 75% of the measuring points has the height larger than a second height. The first height and the second height have a difference not less than 0.6 ?m and not larger than 2.5 ?m.

Abstract: A display device includes a first substrate, a second substrate, a display medium, a first pixel electrode, a second pixel electrode and a transparent electrode. Sub-pixel units are defined on the first substrate and the second substrate. A sub-pixel unit has a first sub-pixel and a second sub-pixel. The transparent electrode is disposed on the second substrate, and the transparent electrode receives a first common potential and a second common potential. When grey levels displayed by the first sub-pixel and the second sub-pixel are in the range of about 96 to 180, a potential difference between the first common potential received when the first sub-pixel has the maximum brightness and the second common potential received when the second sub-pixel has the minimum brightness is in the range of about 0 mV to 100 mV.

Abstract: A display device includes a first substrate, a second substrate, a display medium, a first pixel electrode, a second pixel electrode and a transparent electrode. Sub-pixel units are defined on the first substrate and the second substrate. A sub-pixel unit has a first sub-pixel and a second sub-pixel. The transparent electrode is disposed on the second substrate, and the transparent electrode receives a first common potential and a second common potential. When grey levels displayed by the first sub-pixel and the second sub-pixel are in the range of about 96 to 180, a potential difference between the first common potential received when the first sub-pixel has the maximum brightness and the second common potential received when the second sub-pixel has the minimum brightness is in the range of about 0 mV to 100 mV.