Patent ID: 7554516

Claim:
A method for driving a display device displaying a color by mixing light reflected by a first liquid crystal region and light reflected by a second liquid crystal region by additive color mixture, wherein a dominant wavelength of the light reflected by the first liquid crystal region is in one of a range of 450-500 nm and a range of 570-640 nm, a dominant wavelength of the light reflected by the second liquid crystal region is in the other of the range of 450-500 nm and the range of 570-640 nm, the light reflected by the first liquid crystal region, and the light reflected by the second liquid crystal region have a substantially mutually complementary color relationship, and a reflection band of the first liquid crystal region and the second liquid crystal region, which reflects light on a side of shorter wavelengths being narrower than a reflection band of the first liquid crystal region and the second liquid crystal region which reflects light on a side of longer wavelengths, in which a display state of the first reflection element and a display state of the second reflection element being both changed to switch between a white color display and a black color display.