Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
A projection-type color display device comprising: a white light source; a splitting means for splitting white light emitted from the white light source into a first, a second, and a third beam having respectively different wavelength regions; a modulation means for modulating the first, the second and the third beams; an irradiation means for irradiating the first, the second and the third beams onto a principal surface of the modulation means at respectively different angles; and a projection means for projecting the first, the second and the third beams modulated by the modulation means, wherein the first beam includes a color beam having a weakest intensity among the beams in three primary colors contained in the white light; and a direction of the first beam incident onto the principal surface of the modulation means is closer to a normal of the principal surface of the modulation means as compared with the second and the third beams.
Claim 2
Dependent Claim
77 words
A projection-type color display device according to claim 1, wherein the modulation means comprises a first, a second and a third pixel and a microlens disposed so as to correspond to the first, the second and the third pixels; the first, the second and the third beams are irradiated onto the microlens at respectively different angles; and the first, the second and the third beams are incident onto the first, the second and the third pixels, respectively.
Claim 3
Dependent Claim
53 words
A projection-type color display device according to claim 1, wherein the projection means is a projection lens having an F value of a number N, and the number N is larger than 1/(2 ˙ tan θ' max ), where θ' max is a maximum angle of the beam outgoing from the modulation means.
Claim 4
Dependent Claim
36 words
A projection-type color display device according to claim 1, wherein the white light source is a metal halide lamp, and the first beam is red, the second beam is blue and the third beam is green.
Claim 5
Dependent Claim
35 words
A projection-type color display device according to claim 1, wherein the white light source is a halogen lamp, and the first beam is blue, the second beam is red and the third beam is green.
Claim 6
Dependent Claim
93 words
A projection-type color display device according to claim 1, wherein the splitting means includes a first, a second and a third dichroic mirror; the first dichroic mirror receives the white light and reflects at least one of the second and third beams; the second dichroic mirror receives light transmitted through the first dichroic mirror and reflects the first beam; and the third dichroic mirror receives light transmitted through the second dichroic mirror, reflects one of the second and third beams, which has transmitted the second dichroic mirror, and functions as the irradiation means.
Claim 7
Dependent Claim
97 words
A display device comprising splitting means (4) for splitting light from a light source (1) into at least two beams and directing the beams onto a modulation means (8); wherein the beams contain light of different wavelengths to one another; and wherein the splitting means (4) is arranged to direct the beams onto an input surface of the modulation means (8) so that the angle between the normal of the input surface of the modulation means and the beam having the lowest intensity is smaller than the angle between the normal and the or each other beam.