An electro-optical device for implementing transmission display by a light transmission region and reflection display by a light reflection region, comprising:
- sub-pixels corresponding to three colors, each sub-pixel having a coloration region of one color among the three colors;
- at least one sub-pixel having a coloration region of one color different from the three colors;
- and
- a light transmission region in the sub-pixels corresponding to the three colors and the at least one sub-pixel and a light reflection region in each of the sub-pixels corresponding to the three colors,
- the coloration region in each of the sub-pixels is the same in the light transmission region as that in the light reflection region,
- the coloration region in the at least one subpixel is disposed in the light transmission region,
- wherein the transmission display implements color display using the three colors of the coloration regions disposed in the light transmission regions of the three sub-pixels corresponding to the three colors and the color different from the three colors of the coloration regions disposed in the light transmission regions of the at least one sub-pixel, and
- the reflection display implements color display using the three colors of the coloration regions disposed in the light reflection region of the three sub-pixels corresponding to the three colors.