TH8979B - "Light exposure machine" - Google Patents

Abstract

In the photoresist for forming a phosphor screen on the inner surface of the panel (2) of the colored cathode ray tube by exposure, a photosensitive layer (26) is coated on the inner surface of the panel (2), and This panel (2) is supported on the support platform (17). A ray of light printed a pattern corresponding to the slit of the shadow face (1) is emitted from the light source unit. And rays of light Will impact on a projection lens system (20, 21, 30) that directs rays of light onto Approximately, the locus of the electron beam through corrective optical parts (36). The rays of light passing through the projection lens system (20, 21, 30) will hit the photosensitive layer. Through the opening of the shadow mask (1), the correction optical part has a surface passed out of The slanting light compared to its impact surface. It is rotated by a propulsion unit (27) around the optical axis of the emitted rays of light. From the light source unit (22, 24) to the photosensitive layer (26) is the center axis, so the image of the light source unit (22, 24) is shifted by rotation. And the form of the channel of the shadow mask Which is close to the real circle being formed on the photosensitive layer (26). Hence, the landing preference can be set to large, which will produce a colored cathode ray tube whose purity of its color can be adjusted. Easy

Claims (3)

1. Exposure machine for exposure to the photosensitive layer coated on the front surface. In the panel of colored cathode ray tubes With a pattern corresponding to the channel of the shadow mask That were installed In that panel This will form a phosphor screen, containing a path for supporting the panel. Light source unit for emitting light rays To the sensitive layer In order to print a pattern corresponding to one of the aforementioned shadow mask fields on it, an optical system that includes optical components is corrected. Which is placed between the units Such light source And such shadow mask And where the radiation of light is emitted From the aforementioned light source unit Passed through the sensitive layer Optical parts Revise it With impacted face Where ray of light Falls on it and the surface passes out Where a ray of light passes from there, and the surface passes, it is curved and tilted relative to the affected surface. So that the rays of light Which strikes at the incident position Different on the affected surface Will pass through such modified optical parts with different light path lengths And passes from such an output surface, where the light-through surface is a contoured curved surface, which is determined in accordance with the ratio of the main axis to the support axis of the pattern corresponding to one In the channel of Such a shadow mask Which will be printed as the photosensitive layer When no corrective optical components are provided in such optical systems. Powered unit For rotating optical parts such adjustments Around the axis of rotation Which overlaps with the optical axis of the rays of light emitted by the light source unit. To the sensitive layer 2. Device according to claim 1, where the aforementioned light source unit includes long light sources. For emitting rays of light The protrusion perpendicular to the optical axis and the long channel for limiting the channel of light emitted by the long light source. 3. Apparatus according to claim 1, where the aforementioned optical system, including a projection lens system, irradiates the radiation of light emitted by the light source to the photosensitive layer. It follows a predefined locus and a filter for correcting the radiation distribution of light on the photosensitive layer.