公开(公告)号：US5744809A

公开(公告)日：1998-04-28

申请号：US761834

申请日：1996-12-09

Applicant: Kouji Imada

Inventor： Kouji Imada

IPC: G01J3/46 ,  G01J3/50 ,  H01J9/42

CPC classification number: G01J3/46 ,  G01J2003/468

Abstract: A chromaticity testing device of a CRT phosphor screen is provided, which enables the on-line automatic testing. A supporting member is provided for supporting a face panel of a color CRT having a phosphor screen therein. A light source emits UV light toward the phosphor screen placed on the member. A movable sensor unit senses visible light emitted from a position of the phosphor screen due to the illuminated UV light and outputs chromaticity signals for the red, green and blue components of the visible light thus sensed. A judgment section receives the chromaticity signals outputted from the sensor unit to determine the chromaticity values corresponding to the chromaticity signals thus received, and compares the chromaticity values thus determined with corresponding preset values to thereby judge whether the chromaticity values are acceptable or not. A control section controls the sensor unit and the judgment section. The sensor unit is located to be contacted with the surface of the face panel on sensing to avoid the effect of external light under the control of the control section.

Abstract translation: 提供了一种CRT荧光屏的色度测试装置，可实现在线自动测试。 提供支撑构件，用于支撑其中具有荧光屏的彩色CRT的面板。 光源向位于该构件上的荧光屏发射UV光。 可移动传感器单元感测由于照射的UV光从荧光屏的位置发射的可见光，并且输出由此感测的可见光的红色，绿色和蓝色分量的色度信号。 判断部分接收从传感器单元输出的色度信号，以确定与这样接收的色度信号相对应的色度值，并将这样确定的色度值与相应的预置值进行比较，从而判断色度值是否可接受。 控制部分控制传感器单元和判断部分。 传感器单元被定位成在感测时与面板的表面接触以避免在控制部分的控制下的外部光的影响。