Image displaying apparatus for displaying an image according to light reflected by an optical spatial modulator element

An image displaying apparatus comprising:

• a lighting source system for outputting a plurality of fluxes of incident light;
• a total reflection prism having an opposite-to-modulator surface;
• a reflection type optical spatial modulator element, disposed so as to be opposite to the opposite-to-modulator surface of the total reflection prism, for receiving the fluxes of incident light output from the lighting source system through the total reflection prism and outputting a plurality of fluxes of outgoing light including image information;
• and
• a projecting optical system for projecting the fluxes of outgoing light, which are output from the reflection type optical spatial modulator element and propagate in an on-direction, onto a screen to display an image on the screen according to the image information included in the fluxes of outgoing light,
• wherein the reflection type optical spatial modulator element comprises:
• a substrate;
• a transparent cover plate;
• a refractive index matching layer having a refractive index near to both the transparent cover plate and the total reflection prism and placed between the transparent cover plate and the opposite-to-modulator surface of the total reflection prism;
• and
• a plurality of micro-mirrors, disposed on the substrate and respectively inclined by an on-angle or an off-angle so as to be set to an on-state or an off-state, for receiving each flux of incident light through the refractive index matching layer and the transparent cover plate, and reflecting the fluxes of incident light as the fluxes of outgoing light to propagate each flux of outgoing light reflected on the micro-mirror of the on-state in the on-direction and to propagate each flux of outgoing light reflected on the micro-mirror of the off-state in an off-direction.

An image displaying apparatus comprising:

• a lighting source system for outputting a plurality of fluxes of incident light;
• a reflection type optical spatial modulator element for receiving the fluxes of incident light output from the lighting source system and outputting a plurality of fluxes of outgoing light including image information;
• and
• a projecting optical system for projecting the fluxes of outgoing light, which are output from the reflection type optical spatial modulator element and propagate in an on-direction, onto a screen to display an image on the screen according to the image information included in the fluxes of outgoing light,
• wherein the reflection type optical spatial modulator element comprises:
• a transparent cover plate;
• a plurality of micro-mirrors, respectively inclined by an on-angle or an off-angle so as to be set to an on-state or an off-state, for reflecting the fluxes of incident light passing through the transparent cover plate as the fluxes of outgoing light to propagate each flux of outgoing light reflected on the micro-mirror of the on-state in the on-direction and to propagate each flux of outgoing light reflected on the micro-mirror of the off-state in an off-direction;
• and
• a substrate for supporting the micro-mirrors and preventing each flux of incident light, which passes through the transparent cover plate and is not incident on any micro-mirror, from going out to the projecting optical system.