JPH03208227A - Filming method for fluorescent surface of cathode ray tube - Google Patents

Abstract

PURPOSE:To obtain a fluorescent surface of high brightness by rotating at a high speed a glass panel, on the fluorescent surface of which rewetting solution is sprayed, measuring the glossiness of the inner surface of the fluorescent surface which is in a wet condition, thereafter, and thereby comparing the measured value with the range set up of glossiness while filming process and feed-back are controlled and adjusted respectively. CONSTITUTION:A light absorbing film 2 in a pattern shape is formed in the inner surface of a glass panel 1, to which blue, green and red fluorescent stripes 3 through 5 are attached, and the glossiness thereof is measured by a glossiness measuring means 20. Namely, the panel 1 is rotated at a high speed while rewetting solution is being sprayed on the fluorescent surface, and a light source device 21 and a light receiving device 22 are arranged in such a way that an incident angle and a reflection angle will be 60 deg. respectively with the fluorescent surface which is in a wet condition. Output signals from the device 22 are inputted into a data processing unit 23, and the data is taken in at a set measuring time so as to be processed. In this case, when the measured value is in the range set up, the rewetting solution or lacquer is sprayed as a pre and/or a post process as usual.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for illuminating the fluorescent surface of a cathode ray tube such as a color picture tube, and in particular. It relates to a filming method using a lacquer solution in which a film-forming substance is dissolved in an organic solvent as a filming material.

[Conventional technology]

A general conventional method for filming a fluorescent surface of a cathode ray tube will be explained with reference to a sectional view of a glass panel section in FIG. Yin FM
As a wire tube. For example, the fluorescent surface of a color picture tube is made by applying a photographic method to the inner surface of the glass spring/L/1 to form a pattern of a light-absorbing film 2 to limit the light-emitting area of the phosphor (emitting light in green, blue, and red). is formed. Three blue, green and red phosphor stripes 3.4.5 are then sequentially deposited using photographic methods.

After this. Perform 7 illumination on the fluorescent surface. For this filming. Pure water containing a small amount of alcohol is sprayed onto the fluorescent surface, and the glass panel I is rotated at high speed with the inner surface facing downward to wet the fluorescent surface to an appropriate level. Continuing. Spray a lacquer solution containing toluene as the main ingredient. When the Gauss Spring/L'l is rotated at high speed and dried. Very thin pilonidal covering I! LL6 is formed on top of the phosphor. After this. When aluminum is vapor-deposited. *An aluminum evaporated film 7 forming a planar metal film is formed.

This aluminum vapor deposition@7 maintains the lIr position of the fluorescent surface. The light emitted from the phosphor is reflected on the Gawosbanel. The weight of increasing light output! ! It is something that plays a key role. For this purpose, it is necessary to finish the aluminum vapor deposited film 7 to a state as close to a mirror surface as possible. The above rewetting conditions. Alternatively, improvements have been made to the properties of the lacquer liquid.

However, beyond a certain level. During the next heat treatment process for the fluorescent surface, the aluminum vapor film 7 caused so-called blisters. This is a process that requires special attention because it has the secondary problem of making the product defective.

Conventional. Aluminum vapor deposited film7. therefore. It was recognized that the quality of the organic coating 6 was greatly affected by the wet state of the fluorescent surface subjected to the wet process. As for the condition management. Just a certain amount of rewetting fluid and temperature. or. The only information was the high-speed rotation speed and time after spraying.

Problem H that R Teimei attempts to solve] In the conventional filming method of the AI-line WJM light surface as described above. Including film formation conditions after spraying rewetting liquid. There were problems with the process control, including variations in light output and blistering.

This invention... This was done to solve these problems. The exact wet state of the fluorescent surface on the inner surface of the glass panel is known. As long as it does not cause blistering of the aluminum vapor deposited film in the post-process. The purpose of this study is to obtain a method for filming the fluorescent surface of the Insaka line tube, which provides high brightness, improves quality, and increases yield.

[! Means to solve problem I]

The method of filming the fluorescent surface of a shaded wire tube according to the present invention involves spraying a rewetting liquid onto the fluorescent surface of the inner surface of the gas panel.
After the fluorescent surface was moistened by high-speed rotation for a certain period of time. Measure the glossiness of the fluorescent surface and determine whether it is within the set range. If it exceeds the range, change the timing of the next Otsuka liquid spray. The wet timing or drying conditions of the rewetting process itself are automatically adjusted.

[Effect]

Regarding this invention. Depends on the measurement results of the rewet surface.
If it is much higher than the set value. Add plenty of pure water to form a glossy lacquer film. It was a cabinet. If it is lower than the set value. It is judged that a lacquer film with low gloss is produced. Process management. Furthermore, it is automatically controlled by feedback signals.

〔Example〕

FIG. 1 is a schematic cross-sectional view of a glass panel portion equipped with a gloss measurement device used in a method for filming a fluorescent surface of a cathode ray tube according to an embodiment of the present invention. The figure shows the case of a color picture tube.

On the inner surface of glass spring/I/1. By the method explained in the wL3 diagram above, the light absorption is 11l! 2 patterns are formed,
Three blue, green and red phosphor stripes 3.4 and 5 are deposited. A fluorescent surface is formed. Glossiness measuring means 2
0 is constructed and arranged as follows. Spray rewetting liquid on the fluorescent surface. The glass panel was rotated at high speed and exposed to the wet fluorescent surface. light source device 2] and light receiving device 1'
22. 60° person. It is arranged at a predetermined position so as to have a reflection angle.

The output signal from this light receiving device 22 is sent to the data processing unit 2.
3, and the data is captured and processed at a predetermined measurement time. Output as glossiness.

A method of filming a fluorescent surface according to the present invention using the glossiness determining means 20 described above will be explained with reference to a schematic diagram of processing steps by an automatic filming machine shown in FIG. 1st. ▲Position 311Ck of automatic filming @ (for example, 21 inch, 8 positions. 25 seconds index)
glass panel 1 (
(None of these are shown). It is moved to the B position 32, where approximately 100 cc of rewetting liquid is sprayed for IQ seconds.

next. Career Pa C position 33rd progress. -j fwo spanner/L'l at high speed swing b rotation (] 20r, p, m,
) for 15 seconds. Continuing. At the next D position 34, the gloss IfIII constant means 20 shown in FIG.
Determines the glossiness of a wet fluorescent surface. If the creation value is within the setting range. aAs usual. Wet liquid or lacquer liquid is sprayed on the front and back.

but. If the gloss level becomes low, move to the next E position 35. The lacquer liquid is sprayed relatively early (for example, υ5 seconds earlier than Shibe Hayabusa). on the other hand. If the gloss is high. On the contrary, the lacquer liquid is sprayed with a slight delay (for example, 5 seconds later than the standard).

inside. The optical six degree measurement value at D position 34 is. The average value was taken for each of the five sides. If it is low, reduce the high-speed shaking off time of the beam wet liquid. If the price is high, feed novelization is automatically applied to increase the amount of time required to complete the cut. As a matter of course. Input the base unit value, fixed value, and average value of glossiness to the microcomputer and display. The output is 9J depending on your needs! It is something that can be done. This D position:! The measurement system lIKi function applied to 4 is. As described above. The glass spring lv1
This is also done for the subsequent glass spring /L/1.

After gloss measurements have been taken. Gaosubane/L/1 proceeds to E position 35. When indexing is completed flk5 seconds, lacquer liquid is sprayed at approximately 60cc for 5 seconds. After this. Glass panel l is 12 Or, p. m, for 10 seconds r
#kJ rotated. The lacquer liquid is shaken off.

next. Glass panel 1 is in F position 36. moreover.
The process advances to G position 37, and drying is continued under the constant trench conditions of each chamber.

Next, at H position 38. Glass panel 1 is.
The carrier was removed. transferred to another device. The sealing surface of glass spring A/l is cleaned and completely dried.

A button. In the above example. I explained about so-called solvent-based filming. Also suitable for other emulsion type filming. It is necessary to adjust the drying speed. The method of this invention is applicable.

Also. In the above example. Carrier is Gabunupane/L/1
I explained the case where the data is transferred to each process unit. It can also be applied to rotary types with the same head.

moreover. Types of glossiness determining means. IIIJ constant timing, trench, operational requirements for feedback (rotation speed, timing of spraying time), etc. Types of fluorescent surfaces.
It can be modified and applied to various devices.

(Effects of the Invention) As described above, according to the present invention, the intermediate cost point of the filming process of the fluorescent surface on the inner surface of the glass spring is that the wet state of the fluorescent surface divided into the final stage of the glue wet process is evaluated. The gloss level is automatically measured, and the wet state is accurately detected, and this is used as a feedback means to control the fixing conditions.
As long as it does not cause blistering of the mini-woom deposited film. High brightness can be obtained. Improves quality and yield.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a gun panel portion equipped with means for measuring the glossiness of a fluorescent surface used in a method for filming a fluorescent surface of a cathode ray tube according to an embodiment of the present invention, and Fig. 2 is a cross-sectional view of a cathode ray tube fluorescent surface filming method according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a processing step using an automatic filmmaking machine showing a method of filming a light surface. FIG. 3 is a cross-sectional view showing a fluorescent surface portion on the inner surface of a glass panel in the case of a general color receiver one-quadrant tube. 1... Gaonubanel. 3...Blue phosphor stripe.
4...Green phosphor stripe. 5... Red fluorescent stripe゜. 6...Organic film, 20...Glossiness measuring means. A trigram. The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] Spraying a rewet liquid mainly composed of pure water containing alcohol onto a fluorescent surface formed on the inner surface of a glass panel,
After rotating the glass panel at high speed with the inner surface facing downward to moisten the fluorescent surface, a lacquer solution containing an acrylic film-forming resin whose main component is toluene is sprayed to form an organic film on the fluorescent surface. In the method of filming a fluorescent surface of a cathode ray tube, the phosphor surface is sprayed with a rewetting liquid and the glass panel is rotated at high speed, then the glossiness of the wetted inner surface of the phosphor surface is measured and the set range is determined. A method for filming a fluorescent surface of a cathode ray tube, characterized in that the glossiness of a cathode ray tube is compared, the filming process is controlled, and further, feedback adjustment is performed.