JPS5832337A - Manufacture of color braun tube - Google Patents

Abstract

PURPOSE:To improve the voltage resistant quality of a color Braun tube by subjecting the tube to high voltage treatment, and then vapordepositioning a conductive film on the inner wall of the neck of the tube by subjecting a shielding electrode to dielectric heating. CONSTITUTION:During the process of voltage-proof treatment, the electric potential distribution of the inner wall of a neck 16 is represented by both a curve (a) which indicates the electric potentials of an inner conductive film 15, and a curve (b) which has an ideal slant and indicates the electric potentials of a part of the inner wall of the neck 16, which is uncoated with the film 15 and extends up to a stem part. Therefore, the high-voltage treatments of the fifth to the first grids 10, 9, 8, 7 and 6 and a cathode 5, which are medium to low voltage electrodes, also are completely carried out. After such high voltage treatments are performed, a shielding electrode 9a is subjected to dielectric heating so as to make a conductive film 9b to be vapordeposited on the inner wall of the neck 16 so that the film 9b corresponds to the electrode 9a. As a result, the electric potential distribution of the inner wall of the neck 16 comes to be represented by a curve (a1) which indicates the electric potentials of the inner conductive film 15, and a curve (b1) which indicates the slant of the electric potentials of a part of the inner wall of the neck 16, which extends from the end of the film 15 through the conductive film 9b toward the stem part. Consequently, the voltage resistant characteristic of the color picture tube is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a 2-Putukun tube, and is directed to a method of manufacturing a 411-Putukun tube that can achieve good withstand voltage quality.

When a color cathode ray tube is operated, the voltage is higher than that of a black and white cathode ray tube, reaching up to 30hv. For this reason, multiple e-electrodes are installed inside the tube and make up the large electron gun.
During operation, a high voltage O is applied to the electrode 411, and a low voltage is applied to the electrode 110-. During operation, a discharge phenomenon often occurs, and the fluorescent light 111K is emitted, polarizing the color book tube. %/-h due to one shot destroying various interlayers such as the conductor and IC element of two-television equipment.

Color Book y Tube OII Construction Ill'e High Voltage Other Science 1 and Precious Age y Gue 1m are layer leakage%/% as a means to stop the discharge lK phenomenon in the tube.

Ground the low-voltage side electrode as a high-voltage electrode, apply a high voltage to the high-voltage side electrode to generate a discharge between the electrodes, and generate a discharge between the electrodes (electrode p). ! This is because there is no general information on how to remove stains, Qin origin, etc. on both paintings.

Next, let's discuss how to understand the withstand voltage of a color cathode ray tube. According to the diagram
To explain.

In other words, there is an electron gun (1) inside the neck shaft of the tube.
At L, the cathode (5) that houses the stem bin (4, ζO upper heater 4) installed through the stem bin (3), this cathode @φ) is connected to the 1
Grits (6) 11! ! Comparison with the grid (7), the third grid (8), the fourth grid (9), the second grid wire, the sixth grid tA@, and the thunbergens electrode (■).
(9 valve spacers provided on the 6th grid D and the convergence electrode ring), as well as an internal conductive film (c) formed on the inner wall of the neck a4, and a valve spacer a3. For example, a 30 kTO anode voltage is applied through the
The 5th grid or s3 grid (8) has eflO
It appears that a medium voltage of hy is applied, and then a low voltage of 100'V, which is the same as the second grid (7), is applied, and the fourth grid (9) of 9)
A coiled electrode (9 m) wrapped around an insulated support rod
) and conductive features m <oh> deposited on the inner surface of the neck shaft by induction heating of an O-coated electrode (S).

In such a structure, the fifth grid H%jl13 grid (8), which is the in-house voltage application electrode during the high voltage treatment process,
and a low voltage applying electrode, the j14 pin (9), the second
The grid (7), the first grid (6), the cathode (6), and the heater (4) are grounded, and a high voltage of 60 to 10 kV, which is higher than the anode voltage, is applied to the internal conductive coating, the valve spacer U, and the convergence voltage. *Ki 6 Gritsudken I via tS
K is applied, and the voltage is set to 1 to narrow the discharge between the electrodes and remove dirt, 1II11, etc. to the opposite position 11 of the 6th dashed axis and the 5th grid ring, but the potential inside the pigeon house neck a4 Due to the influence of the conductive film (9k)0 from the desired potential gradient Oallil (b), the potential gradient
), the discharge occurs between the high voltage electrode side and the medium/low voltage electrode side, especially between the layered electrode (9a) and the conductive coating (9b), and the fourth grid (9), which is the low voltage electrode, The second grid ff) *high voltage section 11# is insufficient, and the conductive film (9b) is destroyed by discharge. In the figure, one line (Otori) is the potential of the internal conductive coating.

However, when operating as a color cathode ray tube, it is desirable that the potential gradient on the inner surface of the neck axis corresponds to curve (C). That is, by making it like (C) with), the stem bin (2) to the second grid ff
) 0 low voltage electrode @ 0 neck a4 inner wall O potential is lower because the withstand voltage quality is better.

Although the present invention overcomes the major problems mentioned above, it also provides a voltage-withstanding layer of a color cathode-ray tube that can improve the withstand voltage characteristics as well as the characteristics during operation. The purpose is to provide a method.

Next, the method for manufacturing color cathode ray tubes of the present invention will be explained by the third and fourth gardens. In the figure, 5lIII, 1st cabinet and 1st cabinet indicate the same parts.

In other words, there is an electron gun (1) in the neck shaft of the run tube in one collar.
The heater (2) is provided through the nectar (3) as a metem pin, the internal heater (2) is connected to the cathode (5), and the -pole (2) is logarithmized, respectively. 1st grid (7), 3rd grid (8), 4th grid (9), @I grid axis, 6th grid
Grid ■ and convergence electric tag, this 0:1 convergence electric tag is installed on the convergence electrode wheel and consists of one 9-valve sub-wheel, and the S-grid 1 and convergence electric wheel have a neck I.
A high voltage (e.g., 60 kV) is applied to the internal conductive film formed on the inner conductive film and the pulp base through the anode voltage, and the fifth grid a is in contact with each other.
0 and 3rd grid (8), 4th call grid (9) and @*grid (), 1st grid (), cathode (5), tota (4), rich nectarine (3) The stem bins installed in the stem are connected to each other to form a ground potential, and the IFM ring is constructed in good condition. lk*sui. In the case of 94 grids (9), an insulating support rod uosbr is provided and a nine-layer electrode (9 m) is provided, but the inner surface of the neck shaft has no conductive characteristics (9k) as shown by the broken line. Not established.

The potential distribution on the inner wall of the neck, which is achieved as much as ζOli & processing voltage J6111, is a line with an imaginary potential gradient from 11(a), which indicates the potential of the internal conductive film, to the stem.
Therefore, the middle to low voltage electrodes, the first grid (6) and the high voltage portion (1) of the cathode (5), are also completely energized.

After performing ζOIl & high voltage treatment, the layer electrode (9
a) is heated by induction, and a conductive film (sb) is deposited on the inner wall of the netter opposite to the ζ011 electrode (9-). The potential distribution inside the neck Ie when, for example, 30 kV is applied to is a curve showing the potential of the internal conductive film
The line (C1) indicates the potential gradient in the stem direction through the conductive coating (9b).The withstand voltage characteristics as a color receiving tube are excellent.

The above embodiment describes a cathode ray tube in which the main electron lens section is equipped with an electron gun having a special geometrical structure comprising an auxiliary electron lens with a 22-potential and a main electron lens with a pi-potential. Of course, it can also be applied to nine-color receiving tubes equipped with electron guns of other structures.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the structure inside the neck of the collar tube.
Figure 2 shows the ideal voltage gradient on the inner wall of the neck during voltage resistance treatment.
31I and 4 are diagrams showing an embodiment of the method for manufacturing a color cathode ray tube of the present invention, and 3rd @I is a diagram showing the O structure in the neck. ! 1I diagram and FIG. 4 are diagrams showing the voltage gradient on the inner wall of the O-neck during voltage withstanding treatment and the voltage gradient on the inner wall of the neck during actual operation. 5--Cathode 6-First grid 7-Second grid 8-$13 Grid 9-Fourth grid 9
Heat shielding electrode 9b - conductive film 10 - fifth electrode 11 -
6th Grid 14 - Insulating support 15 - Internal conductive film Patent attorney Inoue - Male Figure 2

Claims (1)

[Claims] Of the plurality of O electrodes which are scissored inside the tube O net and constitute the large electron gun, the front bell electrode O is provided on the inner wall of the neck, which is provided on the predetermined electrode of the nine bell shield electrodes, and is used for haze conduction heating. Yo〉Color pieces made by vapor-depositing a conductive film? How to manufacture the ν tube pKTh, and perform the high voltage II & science and engineering process of the color braking tube before depositing the conductive film! Katup 9 to make the IC thing a tatami mold? tube 0
Production method.