Title:
【発明の名称】カラー画像受像管スクリーンの製造方法
Document Type and Number:
Japanese Patent JP2553378
Kind Code:
B2
Abstract:
A method of producing a colour picture tube screen particularly for a high definition tube. In producing a high definition screen light from a point source (S) is directed through a segmented lens (18) and a shadow mask (24) onto a layer of photoresist applied to the internal surface of a faceplate panel (12). The segmented lens (18) comprises a rectilinear array of differently inclined facets (F). In order to obtain a substantially uniform illumination of the faceplate panel (12), the segmented lens (18) is wobbled in an oblique direction. In order to determine the optimum direction and extent of the wobbling movement, the method in accordance with the present invention involves assuming that the wobbling of the images at the screen is correct and then calculating the positions of virtual light sources to produce these images. In a first refinement of the method a raster pattern is provided on or in the lens (18) which limits the angular spread of light from each of the facets. In a second refinement the lens (18) or faceplate panel (12) is slowly displaced orthogonally to the main wobbling direction.
Inventors:
JAN FUAN DEA UOORU
Application Number:
JP12374288A
Publication Date:
November 13, 1996
Filing Date:
May 20, 1988
Export Citation:
Assignee:
FUIRITSUPUSU EREKUTORONIKUSU NV
International Classes:
H01J9/227; (IPC1-7): H01J9/227
Domestic Patent References:
| JP531147B1 |
Attorney, Agent or Firm:
Masao Sawada