Patent ID: 6663244
Filing Date: 2003-12-16
Classification: G03B,H04N

Abstract:
In a projection system that includes an image projection system adapted to project an image, a text projection system which is adapted to project text in a text box onto the image projected by the image projection system, the text projection system comprising:a light source adapted to project light to display text in a text box; a light path modifier positioned to receive light from the light source; a relay lens positioned to receive light from the light path modifier; a display device positioned to receive the light from the relay lens; and a projection lens positioned to receive the light from the display device and to direct the light so as to superimpose the text box onto the image projected by the image projection system, wherein the relay lens defines the position of an object plane and wherein the light path modifier is sufficiently offset from the object plane to decrease the sharpness of borders of the text box so that contrast between the text box and the image projected by the image projection system is diminished.