JPS58142734A - Spot knocking process of cathode-ray tube - Google Patents

Abstract

PURPOSE:To enable spot knocking to be performed almost completely covering respective electrodes and the peripheries thereof by moving a region of spot knocking by turns while changing connection of each electrode. CONSTITUTION:In the case of spot knocking on a low voltage electrode part, when the first terminal 21 is connected to the grounding side of a power supply 331 for spot knocking through a feeding rail 311, the fourth terminal 24 is connected to the high voltage side of the power supply 331 for spot knocking through the feeding rail 313, while the second terminal 22, the third terminal 23 and the fifth terminal 25 are kept in a floating state, the low voltage electrode part such as mainly the first grid, the second grid and the fourth grid is subjected to spot knocking. In this way, when three or two feeding rails are provided on the stem 11a side and one feeding rail 32 is provided on the panel side while carrying cathode-ray tubes on a conveyer hanger, the low voltage electrode part, the middle voltage electrode part and the high voltage electrode part can be automatically subjected to spot knocking according to a prescribed schedule.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to the prevention of spot knocking in cathode ray tubes.
In particular, the method for spot knocking of a cathode ray tube incorporating an electron gun with a lens thread (1), [Technical background of the invention and its problems 7Q] Cathode ray tubes, especially color Picture tube (conventionally, a via 1 sequential electron gun and a unipotential electron gun are used as an electron gun with two interiors, but the fluorescent surface is >41
``In order to improve the focusing performance of the F beam, *Jfr
Various types of electron guns have been developed, one of which is an electron gun having a compound main lens system.

Next, a state in which an electron gun having this compound main lens system is installed in a cathode ray tube will be explained from FIG.

That is, a cathode (2) containing a heater (1), and a first grid (3), a second grid (4), a third grid (5), and a fourth grid 6 disposed opposite to this cathode (2). ),
The main component is the fifth grid (force) and the sixth grid (8), and the sixth grid (8) (second is the valve spacer
) is provided with a convergence electrode (9) to which the electron gun is fixed.
As shown in the figure (1st brother 2nd grid (4) and 4th grid (6) are connected and a low voltage of about 600μ is applied,
The third grid (5) and the @5 grid resistor (7) are also connected and a medium Ichikawa voltage of about 7 KV is applied, and the sixth grid (8) is connected to the cathode ray tube through the convergence electrode (9) and valve spacer (10). Approximately 25K from the funnel (inner conductive coating 04 connected to anode terminal 0 (to) provided on 12)
3. The electron gun of the above structure has a unibodenary type auxiliary structure with the third grid (5), fourth grid (6), and fifth grid (7). Electron lens is formed @5 grid (7)
A compound main lens system is formed in which a pi-potential type main lens is formed from the sixth grid (8) C2, and the focusing characteristic is made to be good C2.

Next (2) The spot knocking method of this cathode ray tube will be explained with reference to Figures 2 and 3. In Figure 31, the same symbols as in Figure 1 indicate the same parts. (2) The contactor as the first terminal CI which connected the first grid (3), the second grid (4), and the fourth grid (6) is grounded via one power supply rail 0υ, The contactor as the fifth terminal (25) from the anode terminal (13) connected to the sixth grid (8) via the internal conductive coating (1 (a)) is connected to the other feed rail (32).
This spot knocking power supply (33+) is connected to the monthly power supply c3:i through the power supply C3:i, and the other power supply (33+) is grounded.

In the figure, (11a) is a stem, and (15) is a spark gap.

However, the above-mentioned spot knocking method can be seen from the diagram (due to the electrode configuration and shape of the two-electron gun,
There is a problem in that it is extremely difficult to spot knock each electrode and its surrounding area.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned conventional problems (1). During spot knocking, the connection of each electrode is changed and the spot knocking area is sequentially moved (2) each electrode and its surrounding area is almost completely removed. The purpose of the present invention is to provide a spot knocking method for a cathode ray tube that enables spot knocking.

[Summary of the invention]

That is, the present invention is composed of a heater, a cathode, a first grid, a second grid, a third grid, a fourth grid, a fifth grid, and a sixth grid, and the second grid and the fourth grid are electrically connected. (1) A spot knocking method for a cathode ray tube equipped with an electron gun having a converging main lens thread in which the third grid and the fifth grid are connected (2) The heater, the cathode, and the first grid are connected a third terminal connected to the second grid and the fourth grid, a fourth terminal connected to the third grid and the fifth grid, and a fourth terminal connected to the sixth grid. After providing a fifth terminal that is in contact with each other, and providing a spark gap that discharges at a predetermined pressure between the second terminal and the third terminal and between the third terminal and the end 1 of the funeral 4, the first A spot knocking step of the low j electrode section in which a predetermined high voltage is applied from a spot knocking power supply between the terminal of a spot knocking step of the medium voltage electrode section in which a high voltage of a predetermined peak value is applied from the spot knocking step between the first terminal and the fifth terminal;
terminal, the second! fi11! Knocking of the high-voltage electric frame by connecting the third and fourth terminals and applying a high voltage of a predetermined peak value from the spot-knocking power supply between the first and fifth terminals. 7, and each such terminal is connected to the contactor so that the connection between each terminal and the power source for spot knocking is automatically made by the power supply rail (-). ,.

[Embodiments of the invention]

First, the relationship between the terminals taken out from the cathode ray tube and the respective electrodes of the electron gun will be explained with reference to FIG.

The same reference numerals as in Figures 1 and 2 indicate the same parts.

The heater (1), the cathode (2), and the first grid (3) are connected to the first terminal (
211, the second terminal (22), the second grid (4), and the fourth grid (6) are connected to each other. All four terminals connected to the fourth terminal (24) are connected to the stem (
lla) and the second terminal (between the rib and the third terminal and the third terminal +23) and the fourth! '1. ”1
．． Between the four children (24) (two are respectively the predetermined Ichikawa-("discharging spark gap r15I) (152) is the stem r
lla) or in its vicinity. 7 Also, the sixth grid (8) is connected to the anode terminal 03) via the internal conductive coating 04), and from this anode terminal (13) @5
The first terminal (21) and the second terminal are required from both ends of the heater (1), the cathode (2), and the first grid (3). The reason for this is that the sporoto no lagging process is automatically performed in the flow process described later (1) because it is convenient to switch (-).
1) Explanation and explanation with reference to the figure and FIG. In the figure, the same reference numerals as in FIG. 4 indicate the same parts and will not be particularly described.

That is, in the case of spot knocking of the low voltage electrode section, as shown in the figure, the contact llCl! between the first terminals is detected. The power supply for spot knocking (
Connect the ground side (-, fourth terminal c!4) of the power supply for spot knocking (
33,) high voltage (ill i''-('& continued, other second terminal (221, third terminal cause), fifth terminal e5)
Leave it floating.

With this circuit configuration, the second grid (/1) and the fourth grid (6) 52 have a 5V spark gap (15,
)(15,)-2 voltage is applied (2,
The low voltage electrode parts such as the @1 grid (3), the second grid (4), and the fourth grid (6) are mainly subjected to spot knocking.

Next, the spot knocking method of the medium voltage electrode section will be explained from FIGS. 6 and 9 (2). In the figures, the same reference numerals as in FIG.

That is, in the case of spot knocking of the medium voltage electrode part, as shown in the figure (the contactor as the terminal (21) of the second set 1 is grounded via the power supply rail r31.), the second terminal (22) and the Terminal C2 of 3:', ) is connected to the feed rail (
31, )(''', connect further, and then connect the fifth terminal (25)
A contactor is connected to the high voltage side C2 of the spot knocking power source (33,) via the power supply rail G3, and the ground side of the spot knocking power source (332) is grounded. .

With this circuit configuration, the heater (1), cathode (2)
1st grid (3) 2nd grid (41m4 grid (
6) becomes the ground potential, and the terminal c2 of the floating state 4
A voltage due to the capacitance and the spark gap (15,) is applied to the third grid (5) and the fifth grid (7), which are connected to the fifth grid (4).
The medium voltage electrode portion such as the grid (5) is mainly subjected to spot knocking.

Next (1) The spot knocking method of the high voltage electrode part will be explained from Figure 7 and Figure 10 (2). In the figure, the same reference numerals as in Figure 4 indicate the same parts (7, Special (2) Not explained, 1, that is, the high voltage electrode 14 of the spot knocking in the section;
, ) and the second terminal (2 power and the second terminal C
The contactor as 231 is also connected to the power supply rail r31. ) and then grounded, and furthermore, the contactor as the fourth terminal c241 is also grounded via the power supply rail (313). At this time, the contactor as the fifth terminal (25) is connected to the high voltage side (==connected) of the spot knocking source (33,) via the power supply rail (32) as in FIG.

With this circuit configuration, the power source for spot knocking (
The pulsed voltage from 33□) is mainly applied to the 5th grid (7) and the 6th grid (8), causing a glow discharge on the opposing surfaces of these grids (17) and causing spot knocking. to be done (secondary)

Look at Figures 8, 9, and 10 of Ml. You can also see C. L
(2) The spot knocking method of the present invention is to place the cathode ray tube on the conveyor hanger C2, and provide three or two power supply rails on the stem (lla) side and one power supply rail G2 on the panel side. 41 (, piezo electrode part, medium pressure'
Automatic spotting of the electrode section and high voltage electrode section according to a predetermined schedule is possible.

〔Effect of the invention〕

As described in MiT, according to the spot knocking method of the cathode ray tube of the present invention, it is possible to effectively spot knock each electrode of an electron gun having a compound main lens system, which is difficult to remove using conventional methods. For example, stray emission sources in the second grid and its vicinity can be easily removed, and a cathode ray tube with extremely excellent withstand voltage characteristics can be obtained, so its commercial value is extremely large. be.

[Brief explanation of drawings]

What about figure 1? A cross-sectional view to explain the main parts of a cathode ray tube that incorporates an electron gun with a ρ main lens system, Figure 2 is an explanatory diagram of a conventional cathode ray tube spot knocking method, and Figure 3 is a conventional cathode ray tube spot knocking method. FIGS. 4 to 10 are explanatory views of the movement of the cathode ray tube in the process, and are views showing an embodiment of the cathode ray tube spot knocking method of the present invention. FIG. 4 is an explanatory diagram showing the relationship between electrodes and terminals. Figures 5 and 8 are diagrams showing the spot knocking method of the low voltage electrode part, Figure 5 is an explanatory diagram of the circuit configuration, and Figure 8 is an explanation showing the Ii/I relationship between the terminal and the power supply rail. , 6 and 9 are diagrams showing a spot knocking method of the medium voltage electrode part, FIG. 6 is an explanatory diagram of the circuit configuration, and FIG. 9 is an explanatory diagram showing the relationship between the terminal and the power supply rail, 7 and 10 are diagrams showing a spot knocking method of the high voltage electrode section, FIG. 7 is an explanatory diagram of the circuit configuration, and FIG. 10 is an explanatory diagram showing the relationship between the terminal and the power supply rail. l...Heater 2...Cathode 3...1st
Grid 4...Second grid 5...Third grid 6...Fourth grid 7...Fifth grid
8...6th grid 11...Neck
lla medium socket 13...anode terminal 21
...First terminal 22...Second terminal 23...
・Third terminal 24...Fourth terminal 25...
Fifth terminal 31: (1,, 31,, 31,, 32...
- Power supply rails 33, 33. , 33.・・・Tungen agent for spot knocking Patent attorney Mr. Inoue Figure 1 Figure 2 Figure 2
3 Figure 1

Claims (2)

[Claims] (1) Heater, cathode, first grid, second grid, third grid, fourth grid, fifth grid, and sixth grid
In a spot knocking method for a cathode ray tube equipped with an electron gun having a composite main lens system consisting of grids, in which a second grid and a fourth grid are connected, and a third grid and a fifth grid are connected, A first terminal and a second terminal connected to the heater, a cathode, and the first grid, a third terminal connected to the second grid and the fourth grid, and a third terminal connected to the third grid and @5 grid. a fourth terminal, a fifth terminal connected to a sixth grid (two conductive contacts), and a fifth terminal connected between the second terminal and the third terminal, and between the third terminal and the fourth terminal (two A spot knocking step of a low-voltage electrode section in which a spark gap that discharges at a predetermined voltage is provided, and then a high voltage of a predetermined peak value from a spot knocking power source is applied between the first terminal and the fourth terminal; 1. Connect the second terminal of item 11 and the third terminal, and apply a high voltage of a predetermined peak value from the spot knocking power source between the first terminal of item n11 and the fifth terminal of item AiJ. Spot knocking process of medium voltage electrode part, and connection 17 of the first terminal, the second terminal, the wJJ3 terminal, and the fourth terminal, between the first terminal and the fifth terminal. A spot knocking method for a cathode ray tube, characterized in that a high voltage electrode part sporato knocking jig process is performed in which a high voltage of a predetermined peak value is applied from the spot knocking power source. (2) The cathode ray tube according to claim 1, wherein each terminal is made of a contact and the connection between each terminal and the spot knocking power source is automatically performed by a power supply rail. Spot knocking method.