Patent ID: 8045100

Claim:
An optical sheet comprising: a reflective polarizer reflecting a part of incident light and transmitting another part of said incident light; and a filter layer selectively reflecting a transmitted light generated by the transmitting said another part of said incident light, wherein said filter layer reflects a first wave band and a second wave band, the first wave band being in a portion of an area between a green peak and a blue peak in the spectrum of said incident light where green wavelengths and blue wavelengths are overlapped with each other, excluding a remaining portion of the area between the green peak and the blue peak where the green wavelengths and the blue wavelengths are not overlapped with each other; and the second wave band being in a portion of an area between the green peak and a red peak in the spectrum of said incident light where the green wavelengths and red wavelengths are overlapped with each other, excluding a remaining portion of the area between the green peak and the red peak where the green wavelengths and the red wavelengths are not overlapped with each other.