Process of forming mosaic phosphor screen of color picture tube专利检索-透镜印刷显示技术专利检索查询-专利查询网

Process of forming mosaic phosphor screen of color picture tube

阅读：90发布：2023-06-02

专利汇可以提供Process of forming mosaic phosphor screen of color picture tube专利检索，专利查询，专利分析的服务。并且A flat electric winding is disposed slightly above the face plate of shadow mask color picture tubes. The face plate is positioned on a known apparatus including a correction lens to print a mosaic of color phosphor dots on the internal surface of the face plate. A high frequency current flows through the winding to heat the associated shadow mask to somewhat thermally deform it. A beam of ultraviolet radiation from a point source of radiation irradiates the internal surface of the face plate through the lens and deformed shadow mask to print a mosaic of color phosphor dots for each primary color on the surface.，下面是Process of forming mosaic phosphor screen of color picture tube专利的具体信息内容。

权利要求

1. IN A PROCESS OF FORMING A MOSAIC PHOSPHOR SCREEN ON THE FACE PLATES OF SHADOW MASK COLOR PICTURE TUBES, INCLUDING THE STEPS OF APPLYING A PHOSPHOR COATING TO ONE SIDE OF A FACE PLATE, POSITIONING A SHADOW MASK OVER THE PHOSPHOR COATING ON SAID FACE PLATEN, SELECTIVELY EXPOSING THE COATING TO A BEAM OF ULTRAVIOLET RADIATION EMITTED FROM A POINT SOURCE THROUGH HOLES IN THE SHADOW MASK, AND PROCESSING THE EXPOSED COATING TO FORM A MOSAIC OF PHOSPHOR DOTS IN A PREDETERMINED PATTERN ON THE INTERNAL SURFACE OF THE FACE PLATE, THE IMPROVEMENT WHICH COMPRISES: HEATING THE SHADOW MASK TO CAUSE A PREDETERMINED DEFORMATION THEREOF; AND SIMULTANEOUSLY IRRADIATING THE LAYER OF PHOSPHOR MATERIAL THROUGH THE HOLES IN THE THUS DEFORMED SHADOW MASK.

2. The improvement of claim 1 further comprising the step of positioning a correction lens between the point source and the shadow mask for adjusting the path travelled by the beam of radiation.

3. The improvement of claim 1 comprising the further steps of first formiNg a layer of non-luminescent black material on the internal surface of the face plate, said layer having blank spots therein; and then printing color phosphor dots on the blank area of the layer of non-luminescent black material.

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Process of forming mosaic phosphor screen of color picture tube

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