Method of detecting blemishes in the phosphor screen on a kinesc

Details Method of detecting blemishes in the phosphor screen on a kinesc Method of detecting blemishes in the phosphor screen on a kinesc

Filed on

1986-06-13

Date issued

1987-06-23

Examiner

Britton, Howard W.

Patent Class

Facsimile and static presentation processing

SubClass

Facsimile

SubSubClass

Specific signal processing circuitry

Other Related Categories

358101, H04N 718

Type

Patent

Status

active

Patent number

046757295

Description

ABSTRACT:
In a method of detecting blemishes in the phosphor screen on the inside surface of a kinescope faceplate while simultaneously avoiding detecting deposits on the outside surface of the faceplate as blemishes, the faceplate is arranged between a light source and a light detector in an orientation wherein light from the light source passes through the faceplate and subsequently through the phosphor screen prior to reaching the detector.

REFERENCES:
patent: 4454541 (1984-06-01), Duschl
patent: 4454545 (1984-06-01), Duschl
patent: 4542404 (1985-09-01), Duschl
patent: 4575751 (1986-03-01), Duschl
patent: 4605960 (1986-08-01), Cohen
patent: 4625237 (1986-11-01), Cohen

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