JP2004062108A5 - - Google Patents

Claims (6)

By means of a cross dichroic prism combining means using three elements that emit three primary colors for the electroluminescent element, each having a plurality of individually modifiable pixels, and a dichroic wavelength band separation film arranged in a cross shape, In the projection display device for combining the light emitted from the three electroluminescent elements, projecting the combined light onto an object by a projection lens, and displaying an additive color mixture image,
The three electroluminescent elements are electroluminescence light emitting elements in which excitons are formed by injecting charge carriers into a light emitting layer, and modulation pixels that generate and emit light by recombination of the excitons are two-dimensionally arranged. ,
The cross dichroic prism combining means has a prismatic shape with six or more outer shapes, and has an acute angle side angle greater than 45 degrees with the projection lens optical axis of the dichroic wavelength band separation film arranged in the cross shape. There are four surfaces perpendicular to the three optical axes including the optical axis of the projection lens that is deflected by the wavelength band separation film, and emits the three primary colors parallel to the three of the four surfaces. A projection type display device comprising: a modulated light emitting surface of each of the electroluminescent elements; and a surface on which the remaining one of the four surfaces is optically combined and emitted to the projection lens side.   2. The projection display device according to claim 1, wherein an acute angle angle formed with the optical axis of the projection lens of the dichroic wavelength band separation film is greater than 45 degrees and less than 55 degrees.   The lengths of the perpendiculars dropped from the ridge line where the dichroic wavelength band separation films of the cross dichroic prism combining means intersect to the three surfaces of the dichroic prism combining means positioned parallel to the modulated light emitting surface of the electroluminescent element are mutually The projection display device according to claim 1, wherein the projection display devices are equal to each other.   4. The projection display device according to claim 1, wherein the projected image is projected on a screen and can be recognized by diffuse reflected light having a predetermined directivity.   4. The projection display device according to claim 1, wherein the projected image is projected on a screen and can be recognized by diffused transmitted light having a predetermined directivity. Three electroluminescent elements each having a plurality of individually modulated pixels and emitting three primary colors;
  A cross dichroic multiplexer that multiplexes light emitted from the three electroluminescent elements using a dichroic film arranged in a cross shape;
  A projection optical system that projects the light combined by the cross dichroic multiplexing element onto an object and displays an additive color mixture image;
  The electroluminescence device is an electroluminescence device in which excitons are formed by injecting charge carriers into a light emitting layer, and modulation pixels that generate and emit light by recombination of the excitons are two-dimensionally arranged.
  The cross dichroic multiplexing element has a prismatic shape having six or more outer surfaces, and an acute angle side angle with the optical axis of the projection optical system of the dichroic film is larger than 45 degrees, and the dichroic film deflects the dichroic multiplexing element. There are four surfaces perpendicular to the three optical axes including the optical axis of the projection optical system to be received, and three of the four surfaces are substantially the same as the modulated light emitting surfaces of the three electroluminescent elements The projection type image display device is characterized in that the remaining one surface is a surface for emitting the combined light to the projection optical system side.