Patent ID: 6558860
Filing Date: 2003-05-06
Classification: H01J

Abstract:
A method of producing a screen (6) having a striped structure of electroluminescent material on a display window (3) of a color display tube (1), which method comprises exposing a photosensitive material on the display window (3) to light emitted by a elongated light source (22) and passed through a lens system and a shadow mask (13), which shadow mask (13) is suspended from the display window (3) and which lens system is positioned between the elongated light source (22) and the shadow mask (13), the lens system, forming an image of the elongated light source (22) on the screen (6), comprising a first element (28) for substantially correcting the rotation of the image of the elongated light source (22) and a second element (27) for substantially determining the landing position, characterized in that the lens system further comprises a third element (35) which is provided with means for adjusting the rotation of the image of the elongated light source (22) over the entire screen (6).