Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
An image projecting apparatus comprising a light source (401); modulating means (406, 407, 421, 431, 441) for modulating light in accordance with an image to be projected; an illuminating optical system (402, 403) for supplying light from said light source (401) to said modulating means (406, 407, 421, 431, 441); and a projecting optical system (102, 104, 411, 412) for projecting light from said modulating means (406, 407, 421, 431, 441); characterised in that the illuminating optical system (402, 403) and/or the projecting optical system (102, 104, 411, 421) comprises a telecentric optical system (102, 403) and includes a light shielding means (103, 404, 605) for controlling the light which is supplied therethrough.
Claim 2
Dependent Claim
29 words
Apparatus as claimed in claim 1, wherein the light shielding means (103, 404, 605) admits light through an aperture therein, the size and/or shape of which can be altered.
Claim 3
Dependent Claim
13 words
Apparatus as claimed in claim 2, wherein the aperture is circular or polygonal.
Claim 4
Dependent Claim
35 words
Apparatus as claimed in claim 1, 2 or 3, comprising means (602) for detecting ambient light, and wherein said light shielding means (103, 404, 605) controls the light supplied therethrough in accordance with the detection.
Claim 5
Dependent Claim
31 words
Apparatus as claimed in any one of the preceding claims, wherein the illuminating optical system (402, 403) and/or the projecting optical system (102, 104, 411, 412) includes a rod integrator (402).
Claim 6
Dependent Claim
131 words
An image projecting apparatus comprising: a light source (401); a spatial light modulating element; an illuminating optical system (402, 403) for irradiating a light from the light source (401) on the spatial light modulating element; and a projecting optical system (102, 104, 411, 412) for projecting an image of the spatial light modulating element; characterised in that the illuminating optical system (402, 403) or the projecting optical system (102, 104, 411, 412) is constituted by a telecentric optical system (103, 403) and is provided with a light shielding frame (103, 605) disposed at a focus position of the telecentric optical system (103, 403), the light shielding frame (103, 404, 605) having a circular or polygonal shape centering on a light axis, the shape or a size of which can be changed.
Claim 7
Dependent Claim
67 words
The image projecting apparatus according to claim 6, further comprising an environment detecting means (602) for detecting an environment surrounding the image projecting apparatus (601) or the projected image; and a light shielding frame (103, 404, 605) shape changing means (603, 604) for changing the shape of the light shielding frame (103, 404, 605) in correspondence with a result of detecting by the environment detecting means (602).