JPS6015096B2 - Exposure device for color picture tube - Google Patents

Description

[Detailed description of the invention] The present invention relates to an exposure apparatus for color picture tubes.

In general, when manufacturing color picture tubes, the inner surface of the face plate is provided with holes or stripes in order to obtain a hole-shaped or stripe-shaped arrangement of projections, an optical surface, or a similar arrangement for coating graphite for the black matrix. Alternatively, a method is adopted in which a photosensitizer is applied and exposed through a shadow mask. Figure 1 shows the schematic configuration of a conventional exposure device. Exposure light passes from an ultra-high-pressure mercury lamp 1 as a light source, passes through a condenser lens 2, and is emitted from an exposure light source 2 corresponding to the emission position of the electron beam of the color picture tube. be done.

This exposure light passes through a correction lens 3 and a light intensity correction filter 5 for correcting the light intensity at the center and peripheral areas of the face plate 4 so as to draw a trajectory similar to an electron beam, and then passes through a shadow mask 6 attached to the face plate 4. Through this, a poppy, a photoreceptor, or a photosensitizer coated on the inner surface of the face plate 4 is exposed. However, such an exposure device suffers from a large loss of optical energy within the condenser lens 2.
The utilization efficiency of the total light emitted from the mercury lamp 1 for exposure work is low, ranging from several percent to 1 percent, and therefore the light emitted from the tip of the condenser lens is also weak, resulting in a long exposure time. In order to solve this drawback, a method has been proposed in which light emitted from an ultra-high pressure mercury lamp 1 is used directly for exposure without using a condenser lens, as shown in FIG. In FIG. 2, a plate 8 is provided on the top of the device screen 7 for positioning and placing the face plate 4 thereon.
In addition, the light source section provided in the device body 7 is an ultra-high pressure mercury lamp 1.
It also includes a lamp house 9 to which the ultra-high pressure mercury lamp 1 is attached and which serves as a chamber for effectively utilizing a cooling medium for removing the heat generated by the ultra-high pressure mercury lamp 1 itself. 10 is a glass window, and 11 is a fine movement mechanism.

During exposure work, it is important to accurately position the inner tube part of the quartz tube la, which is the actual light source of the ultra-high pressure mercury lamp 1, and the face plate 4, which is the light source. This is necessary to accurately form holes or stripe-like relationships on the inner surface of the face plate 4. Inner tube part of quartz tube la and face plate 4 of ultra-high pressure mercury lamp 1
To position the lamp relative to the plate 8, after attaching the ultra-high pressure mercury lamp 1 to the lamp house 9, turn on the ultra-high pressure mercury lamp 1, and use the fine movement mechanism 11 provided at the bottom of the lamp house 9 with the plate 8 as a reference. This is done by operating. However, this method requires positioning work every time the ultra-high pressure mercury lamp is replaced, and during this time the exposure apparatus cannot be used for work, significantly reducing the operating rate. The present invention was made in view of the above-mentioned drawbacks of the conventional apparatus, and an object of the present invention is to provide an exposure apparatus that can perform exposure work efficiently.

The present invention will be explained below based on illustrated embodiments.

FIG. 3 is a sectional view showing a first embodiment of the exposure apparatus according to the present invention.

Since the ultra-high pressure mercury lamp 1 is generally a glass product,
The central axes of the socket part 12 for attachment to the lamp house 9 and the inner part of the quartz tube la do not match at all. The centering jig 13 is a first eccentric ring 1 having an eccentric hole 148 that is rotatably fitted to the socket part 12 of the ultra-high pressure mercury lamp 1.
4, and a second eccentric ring 15 which rotatably competes with the first eccentric ring 14 and the centering jig attachment hole 9b and has an eccentric hole 15a. Further, the lamp house 9 is positioned and fixed in advance so that the centering jig attachment hole 9b of the lamp house 9 is positioned with respect to the plate 8 within an accuracy necessary and sufficient for exposure work. Therefore, the quartz tube la for the socket part 12 of the ultra-high pressure mercury lamp 1
The center of the centering jig 13 is aligned with the center axis of the inner tube part of the quartz tube la by rotating and adjusting both eccentric rings 14 and 15 to their respective optimal positions while checking the center axis deviation of the inner part of the inner tube. be able to.

Perform this kind of work using the centering jig mounting hole 9 of the lamp house 9.
By attaching the centering jig 13, which was carried out before attaching it to the lamp housing 9, to the centering jig mounting hole 9b of the lamp house 9, which has been previously positioned and fixed with respect to the plate 8 within the accuracy necessary for exposure work, the face The relative positions of the plate 4 and the inner tube of the quartz tube la of the ultra-high pressure mercury lamp 1, which serves as a substantial light source, are mounted with high precision. As is clear from the above description, the exposure apparatus according to the present invention has advantages such as being able to easily and accurately replace and install an ultra-high pressure mercury lamp in a very short time.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional exposure apparatus, FIG. 2 is a cross-sectional view of another conventional exposure apparatus, and FIG. 3 is a cross-sectional view showing one embodiment of the exposure apparatus according to the present invention. 1...Ultra high pressure mercury lamp, LA...Quartz tube, 4...Face plate, 7...Device condition, 9...Lamp House, 9a...Ultra high pressure mercury lamp mounting hole, 9b...Centering jig mounting hole, 12
...Socket part, 13 ... Centering odor, 1
4, 15...Eccentric ring, 14a, 15a...
...Eccentric hole. O figure 2 figure O 3 figure

Claims (1)

[Claims] 1. In a color picture tube exposure device that exposes a phosphor or photosensitizer coated on the inner surface of a face plate using a mercury lamp housed in a lamp house provided in the device housing, the lamp is rotatably fitted into the socket of the mercury lamp. A centering jig equipped with an eccentric ring mechanism having an eccentric hole is provided, a centering jig mounting hole into which the centering jig fits is provided in the lamp house, and a quartz plate is attached to the center of the centering jig. A color picture tube exposure device consisting of a mercury lamp whose tube centers are aligned and mounted in a fixedly positioned lamp house.