JPH04341733A - Electrode unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a television receiver,
The present invention relates to an electrode unit of a flat panel display device used in computer terminal displays and the like.

0002

2. Description of the Related Art In recent years, electron tube type flat panel display devices have been actively developed. This flat panel display device is similar in principle to a display device using a conventional cathode ray tube (CRT), but the distance from the cathode to the anode is significantly shorter than that of the conventional CRT method. The goal is to realize a thin display device. For this reason, flat panel display devices generally have a configuration in which an electrode unit with an extremely short distance from the cathode to the anode and a linear hot cathode are housed in a box-shaped vacuum container.

[0003] The electrode unit includes a plurality of flat control electrodes with small diameter holes and slits etched with high positional accuracy in order to deflect, focus, and control the electron beam emitted from the linear cathode. Constructed by laminating layers. Also,
Each control electrode has an insulating structure because the potentials are different during electron beam operation.

[0004] A conventional method for manufacturing an electrode unit will be described below with reference to the accompanying drawings. FIG. 2 is a sectional view of a main part of a conventional display device, which is composed of a plurality of linear hot cathodes 103, an electrode unit 107, and a face glass 110. Although only one linear hot cathode 103 is depicted in FIG. 2, in reality, several dozen linear hot cathodes are arranged in the left-right direction of the page. Further, a back container (not shown) is disposed on the top surface of the linear hot cathode 103 and forms a vacuum container together with the face plate.

In the electrode unit 107, the electron beam control electrodes 106d to 106a are connected to a plurality of metal pins 101a which are butt-fixed to the electron beam control electrode 106e on the phosphor 109 side by laser welding or the like. Insulating spacer 105
An insulating spacer 104 is laminated at a predetermined interval via d to 105a and fixed to the end of the pin on the linear hot cathode 3 side.
After arranging the electrodes, each electron beam control electrode is locked by melting the end of the metal pin 101a protruding from the fixed insulating spacer 104 using a laser (for example, a YAG laser), and the electrode unit 107 is completed. .

The operation will be explained below. When a heat current and an electron extraction pulse voltage are applied to the linear hot cathode 103, the electron beam is directed to the electron beam control electrode 106a.
pulled towards.

Electron beam control electrodes 106a to 106e are formed with electron beam passage holes 108 or slits, and while the electron beam passes through these passage holes or slits, each Electron beam control electrodes 106a to 106
The light is controlled, focused, and deflected by the voltage applied to e, and reaches the phosphor 109 to which a high voltage is applied, and displays an image by selectively causing the phosphor 109 to emit light.

[0008]

[Problem to be solved by the invention] By melting the end of the metal pin with a laser, each electron beam control electrode is firmly locked, so it becomes difficult for each electron beam control electrode to slide back and forth and left and right. When a predetermined voltage is applied to multiple linear hot cathodes to generate an electron beam, the linear hot cathodes are heated to approximately 650°C, and the generated heat increases the temperature of the electron beam control electrode. Not only do
A temperature difference occurs between each electron beam control electrode.

For this reason, it is impossible to obtain slippage of the electron beam control electrode that absorbs the difference in expansion of the electron beam control electrode due to heat generation of the linear hot cathode. Therefore, due to the deformation of the electron beam control electrode due to the lack of slippage of the electron beam control electrode, landing deviation of the electron beam occurs, making it impossible to obtain a good image.

The present invention solves the problems of the prior art described above, and allows each electron beam control electrode to perform good electron beam control without causing thermal strain even when subjected to thermal changes such as expansion or contraction. The object of the present invention is to provide an electrode unit that enables this, and is particularly useful for use in flat panel display devices.

[0011]

[Means for Solving the Problems] In order to achieve this object, the method of manufacturing an electrode unit for a display device of the present invention includes alternately inserting insulating spacers and electron beam control electrodes into metal pins. An electrode unit having a structure in which electron beam control electrodes are held at intervals by the insulating spacer, the insulating spacer having a stepped portion on at least one side that is higher than the thickness of the electron beam control electrode, It has a configuration in which a gap is formed between the electrode and the insulating spacer.

0012

[Operation] Even if a stepped insulating spacer is interposed between each electron beam control electrode and the end of the metal pin is laser melted,
Since the thickness of the electron beam control electrode is smaller than the step of the stepped insulating spacer, a slight gap is formed between each electron beam control electrode and the stepped insulating spacer, so that no excessive force is applied to each electron beam control electrode. Because it is locked at
Even if each electron beam control electrode expands after a voltage is applied to the linear hot cathode, each electron beam control electrode can slide and will not be deformed during use.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a sectional view of essential parts of a display device according to the present invention. The electrode unit 9 has a plurality of metal pins 1a which are laser welded to a predetermined position of the electron beam control electrode 8e on the side of the phosphor 11, and a through hole is formed at a predetermined position into which a plurality of metal pins 1a can be inserted. After inserting the planar insulating spacer 5, the electron beam control electrodes 8d to 8a and the stepped insulating spacers 6c to 6a are inserted.
After placing the fixed insulating spacer 4b at the end, pressure is applied to the outer periphery of the fixed insulating spacer 4b, and the ends of the plurality of metal pins 1a are melted and fixed with a laser to form the electrode. The unit is completed.

Furthermore, double-sided stepped insulating spacers 7b and 7
Even if the spacers a and the planar insulating spacer 5 are arranged in the same manner as described above, gaps are formed between the double-sided stepped spacers 7b and 7a, the planar insulating spacer 5, and the electron beam control electrodes 8d to 8a.

[0016]

[Effects of the Invention] As described above, according to the present invention, the following effects can be obtained.

When a plurality of electron beam control electrodes are fixed, by forming a gap between each electron beam control electrode and an insulating spacer, the electron beam control electrodes can be fixed in a stress-free state. It is possible to obtain an electron beam control electrode unit that does not prevent slippage due to expansion and does not undergo deformation due to fixation of the electron beam control electrode. Therefore, it is possible to obtain an image display device that can display good images without landing deviation of the electron beam.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing the configuration of an embodiment of an electrode unit of the present invention.

[Figure 2] Cross-sectional view of main parts showing the configuration of a conventional electrode unit

[Explanation of symbols]

1a Metal pin 1b Laser melting part 2 Laser welding part 3 Linear hot cathode 4a Fixed insulating spacer 4b Stepped insulating spacer 5 Planar insulating spacer 6b to 6d Stepped insulating spacer 7a, 7b Double-sided stepped insulating spacer 8a to 8e
Electron beam control electrode 9 Electrode unit 10 Electron beam passage hole 11 Fluorescent material 12 Face glass 101a Metal pin 101b Laser melting part 102 Laser welding part 103 Linear hot cathode 104 Fixed insulating spacers 105a to 105d Insulating spacers 106a to 106e Electron beam control electrode 107
Electrode unit 108 Electron beam passage hole 109 Phosphor 110 Face glass

Claims (1)

[Claims] 1. An electrode unit having a structure in which insulating spacers and electron beam control electrodes are passed alternately through metal pins, and the electron beam control electrodes are held apart by the insulating spacers, An electrode unit characterized in that a stepped portion larger than the thickness of the electron beam control electrode is formed on at least one side of the spacer.