JPS596023B2 - Mercury lamp position adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a mercury lamp adjustment device, in particular a method for exposing the fluorescent surface of a striped color cathode ray tube using the arc of a long arc ultra-high pressure mercury lamp (abbreviated as mercury lamp) as a direct rectangular light source. The present invention relates to a position adjustment device for a mercury lamp in a light surface exposure device.

To expose the fluorescent surface of a striped color cathode ray tube, the fluorescent surface is exposed through a shadow mask having an elliptical slot 1 as shown in FIG.
In order to form a band-shaped phosphor stripe 2 as shown in FIG. 2, it is necessary to use a rectangular exposure light source.

As such a rectangular light source, it is well known that a method that uses the arc of a long arc mercury lamp directly as a light source is the most excellent in terms of light utilization efficiency.

However, this method has the disadvantage that positioning the light source is difficult.

That is, in order for the electron beam to correctly hit the phosphor stripe, the positioning accuracy of the light source should be set to 0.
It is necessary to set it as 03-0.05m7n.

However, in conventional exposure equipment that uses a condenser lens to condense light emitted from a mercury lamp, it is relatively easy to satisfy the above positioning accuracy by mechanically positioning the condenser lens. be.

In contrast, the position of the arc of a mercury lamp cannot be determined mechanically.

This will be explained with reference to FIG.

A mercury lamp has a structure in which mercury 4 is sealed in a quartz tube 3, and a cathode 5
By applying a high voltage of 0.5 to 1.5'V between the anode 6 and the anode 6, an arc spreads throughout the inner tube 1 of the quartz tube 3.

Such a mercury lamp is attached to an exposure device via an insulating insulator 8.

Therefore, the fitting accuracy between the insulating insulator 8 and the exposure device and the center position of the inner tube T with respect to the center of the insulating insulator 8 change each time the mercury lamp is replaced.

For the former, it is difficult to reduce the tolerance to below 0.03In7/ using normal processing methods, and for the latter, it is difficult to reduce the tolerance to below 0.1rItm because the accuracy of the quartz tube 3 itself cannot be sufficiently increased. It is.

Therefore, it is necessary to adjust the position of the mercury lamp every time the mercury lamp is replaced.

Such a mercury lamp position adjustment device is currently under application by the applicant.

This device combines two eccentric rings with the insulating insulator of a mercury lamp, and the position of the mercury lamp is adjusted by the action of these two (solid eccentric rings).

However, although it is theoretically possible to adjust the insulator by rotating the insulator using this method, in reality it is difficult to improve the precision of the fit of the insulator, and rotating the insulator makes it difficult to adjust the mercury lamp. Subsequent experiments revealed that adjustment was difficult because the center of the inner tube did not move on the same circumference.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a device that can extremely easily adjust the position of a mercury lamp.

The invention for getting off the train will be explained based on the illustrated embodiments.

FIG. 4 is a schematic cross-sectional view showing an embodiment of the position adjustment device according to the present invention.

10 is an outer ring, the outer diameter and inner diameter of which are eccentric from each other.

Reference numeral 11 denotes an inner ring which is slidably fitted onto the inner diameter of the outer ring, and similarly, its outer diameter and inner diameter are eccentric to each other.

Reference numeral 12 denotes a lamp ring that is slidably combined with the inner ring 11, and its outer diameter and inner diameter are concentric, and the insulating insulator 8 of a mercury lamp is inserted and fixed into this lamp ring 12.

In this embodiment, the outer ring 10 has an outer diameter of 20,
0, φ, inner diameter 17.0φ, eccentricity 0.5m, inner ring 11 has outer diameter 17. Ommφ, inner diameter 14.0mm
φ, eccentricity 0.5mm, lamp ring 12 outer diameter 14.0
φ, inner diameter 12. Ouφ was used.

Generally, the center O of the inner tube of a mercury lamp is eccentric with respect to the lamp ring 12.

10a is the locus of the center O of the inner tube of the mercury lamp when the outer ring 10 is rotated, 11a is the locus of the center O of the inner tube of the mercury lamp when the inner ring 11 is rotated, and 12a is the locus of the center O of the mercury lamp when the lamp ring 12 is rotated. The center of the inner tube of the mercury lamp is 0
This is the trajectory of

Therefore, even if the outer ring 10 is rotated, the relative distance between the center 0 of the inner tube of the mercury lamp and the center of the outer diameter of the outer ring 10 does not change, but if the inner ring 11 and the lamp ring 12 are rotated, the center of the inner tube of the mercury lamp is O can be aligned with the center of the outer diameter of the outer ring 10.

Whether the two match or not can be determined from the change in the position of the center of the inner tube of the mercury lamp when the outer ring 10 is rotated.

To adjust the position of this mercury lamp, you can either turn it on on the exposure stand, or
Alternatively, this may be done by applying light from a projector, but in the present invention, the outer periphery of the outer ring is fitted and adjustments are made outside the exposure table, and the cartridge type is fitted into the exposure table.

Therefore, when replacing the mercury lamp, it is only necessary to replace the cartridge, thereby improving the operating rate of the exposure table.

As is clear from the above description, according to the mercury lamp position adjustment device of the present invention, the position of the mercury lamp can be extremely easily adjusted by using a cartridge that is a combination of two eccentric rings and one concentric ring. Can be adjusted.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a shadow mask slot, Fig. 2 is an explanatory diagram of a phosphor stripe, Fig. 3 is a schematic diagram of an ultra-high pressure mercury lamp, and Fig. 4 is an implementation of the mercury lamp/position adjustment device according to the present invention. FIG. 2 is a schematic cross-sectional view showing an example. 3...Quartz tube, 4...Mercury, 1...Inner tube, 8...
・Insulation insulator, 10... Outer ring, 11...
Inner ring, 12... ramp ring.

Claims (1)

[Claims] 1 Attach two eccentric rings and an insulating insulator for the mercury lamp in a fluorescent surface exposure device that exposes the fluorescent surface of a striped color cathode ray tube using the arc of a long arc ultra-high pressure mercury lamp as a direct rectangular light source. The position of a mercury lamp that consists of concentric rings, these rings are assembled so that they can slide freely relative to each other, and the concentric ring is the innermost, and the outer circumferential center of the outer eccentric ring is set to the desired light source position. A position adjusting device for a mercury lamp, in which the outermost periphery of the eccentric ring is fitted to form a cartridge consisting of two eccentric rings and one concentric ring.