Display apparatus and projection type display apparatus

A projection type display apparatus comprising:

• a plurality of image display elements;
• a color separating optical system for color-separating light from a light source into a plurality of color lights;
• an irradiating optical system for irradiating said plurality of image display elements with the lights from said color separating optical system;
• a color combining optical system for combining the lights from said plurality of image display elements;
• and
• a projection optical system for projecting the lights combined by said color combining optical system onto a projection surface;
• said projection type display apparatus having on the optical path of at least one of said plurality of color lights an optical element having the characteristic of transmitting therethrough a region of a predetermined wavelength or longer in a visible light region but blocking a region of wavelengths shorter than said predetermined wavelength or a converse characteristic;
• said color separating optical system having at least one color separating surface subjected to inclination correction, said color separating surface being movable,
• wherein the inclination correction of the color separating surface effects preventing a cut wavelength from being varied by the difference in the angle of incidence of the light onto the color separating surface.

A projection type display apparatus comprising:

• image display elements of three colors R, G and B;
• a color separating optical system for color-separating light from a light source into the three colors R, G and B;
• an irradiating optical system for guiding said color-resolved lights of the three colors R, G and B to the image display elements of the respective colors;
• a color combining optical system for combining the lights from said plurality of image display elements;
• and
• a projection optical system for projecting the lights combined by said color combining optical system onto a projection surface;
• said projection type display apparatus having in the optical path of the R color light and/or the optical path of the G color light an edge filter retractably insertable into the optical path and having the characteristic of transmitting therethrough a region of a predetermined wavelength or longer in a visible light region but blocking a region of wavelengths shorter than said predetermined wavelength, or a converse characteristic;
• said color separating optical system having two dichroic mirrors, one of said two dichroic mirrors which separates a light including the R color light and a light including the G color light from each other being subjected to inclination correction, said dichroic mirror subjected to inclination correction being movable in a direction parallel to a color separating surface said dichroic mirror has.

A display apparatus comprising:

• a color separating optical system for separating light from a light source into a plurality of lights differing in color from one another;
• and
• at least one display element for modulating the plurality of lights differing in color from one another,
• wherein the color separating optical system includes at least one color separating surface movable in a direction parallel to a direction along the color separating surface.

A display apparatus comprising:

• a color separating optical system for separating light from a light source into a plurality of lights differing in color from one another;
• and
• at least one display element for modulating the plurality of lights differing in color from one another;
• wherein said color separating optical system includes a movable color separating optical element having a color separating film provided with a posture in a predetermined angle inclined with regard to an optical axis of said light source, and
• wherein the color separating film effects an inclination correction to prevent a cut wavelength from being varied by the difference in the angle of incidence of the light onto the color separating film.