Reflection type liquid crystal display device capable of color display

Claim 1

A liquid crystal display device, comprising: light-converging means provided for each pixel or each pixel row consisting of a plurality of pixels for converging light incident from outside of the device.; first light path converting means for converting the converged light into a parallel light; light separating means for separating the parallel light into its red-, green- and blue-light components, said light separating means being formed of a diffraction grating having a concave surface; a transparent substrate formed of a material having a relatively large refractive index for converting each of the light components separated by said light separating means into a parallel light; a liquid crystal cell for controlling an amount of each light component transmitted; control means for controlling the light transmittance of the liquid crystal cell for a plurality of pixels by applying a voltage to the liquid crystal cell; and reflecting means for reflecting the light transmitted through the liquid crystal cell such that the reflected light is incident to the liquid crystal cell along a light path that is substantially the same light path of the light incident from outside of the device.