Projection apparatus having improved projection properties, and method and procedure, respectively, for projecting an image

摘要

In a method for projecting an image onto a projection area (10) by at least one first (110) and second (210) beam, in order to create an improved image on the projection area, the deviation of the projection of the first and second beam on the projection area is determined, and the intensity of the first and/or second beam is varied over time according to the previously determined deviations.

主权项

1. A method for projecting an image onto a projection screen by means of at least one first and one second beam, wherein by means of the superimposition of the projection of the first and of the second beam onto the projection screen a reference impression of the image is to be generated, wherein the at least first and second beams for projecting the pixels are directed onto the projection screen by means of a first mirror, wherein by means of an actual deviation of the projection of the first and of the second beam onto the projection screen an actual impression of the image is generated which deviates from the reference impression, wherein the method comprises the method steps A) determination of the actual deviation of the projection of the first from the second beam on the projection screen, B) temporal variation of the intensity of the first and/or second beam according to the deviations determined in method step A) to generate the reference impression,
wherein for the accomplishment of method step A) a second mirror is arranged between the first mirror and the projection screen and at any one time only a single beam is operating, wherein the second mirror is oriented such that it directs the respective beam, which is operating, at least partially onto a detector having a fixed position, wherein the first mirror for the first beam is brought into a first orientation in which a maximum intensity of the first beam is measured at the detector and wherein the first mirror for the second beam is brought into a second orientation in which a maximum intensity of the second beam is measured at the detector and wherein the first and second orientations of the first mirror are respectively determined thus that the first mirror is irradiated with an additional beam and the deflection thereof is determined by means of a second detector, wherein the orientation of the first mirror is determined by means of the deflection of the additional beam.