JPH0494043A - Plate type image display device - Google Patents

Abstract

PURPOSE:To induce no discharge at all even if any conductor comes close to a face plate by holding a high voltage applied terminal which is led out of a vacuum envelope through a through hole provided for a face panel, with an insulating member while being interspaced with outer surface of the face panel, and thereby joining these three components consisting of the high voltage applied terminal, the insulating member and of the face panel together with low melting glass at the hold section. CONSTITUTION:The circumferential periphery section of a face panel 40 is provided with a through hole 40a, a high voltage applied terminal 43 is penetrated through the through hole 40a, and it is vacuum-sealed with sealing glass 14. At the introducing section of the high voltage applied terminal 43, the high voltage applied terminal 43 is held by an insulating member such as a cover glass 48 while being interspaced with the outer surface 40b of the face panel 40, so that these three components are thereby joined together with low melting glass 44. By this constitution, the exposed section of the high voltage applied terminal 43 is parted as far as the side end section 40c of the face panel 40. This thereby enables the outer surface 40b of the face panel 40 exposed out of a cabinet 50, that is, a creeping distance to a face plate area, to be lengthened, thereby inducing no discharge at all even if any conductor comes close to the face plate.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Invention Part 1 of the Invention Particularly, it relates to a flat panel image display device having an improved structure for introducing a high voltage application terminal for applying a high voltage to the anode of a cathode ray tube. Conventionally, many patents and documents have disclosed the technology for the introduction structure of high voltage application terminals in cathode ray tubes. Fig. 4 is a partially cutaway side view of a conventional cathode ray tube equipped with an anode button. 5 is a shadow mask formed on the inner surface of the face panel portion 2, and 6 is a shadow mask, which is disposed at a predetermined distance from the fluorescent film 5, and is attached to a picture frame-shaped mounting frame 7. 8 is an internal portion. A conductive film is formed on the inner surface of the funnel part 3 by graphite coating. 9 is an internal magnetic shield for suppressing the influence of external magnetic fields such as earth's magnetism. 10 is attached to the mounting frame 7 at one end. The free end of the attached conductive spring 10 is in pressure contact with the internal conductive film 8, and the high voltage applied to the internal conductive film 8 is guided to the shadow mask 6 etc. via the mounting frame 7. FIG. 5 is an enlarged cross-sectional view of the anode button part. As shown in the figure, number ζ 11 is a tip-shaped anode button buried in a predetermined position in the funnel part 3 of the vacuum envelope 1, and its inner end face 11b is inside. Even though the anode button 11 is electrically connected to the conductive film 8, an opening 11a is formed on the outer end surface of the anode button 11 into which a bifurcated contactor 12 is inserted in order to apply a high voltage to the anode button 11. The outside of the anode button 1 is covered with an anode cap 13 made of silicone rubber, etc. Therefore, even if a conductor approaches this area, the anode button 1
1 or contactor 12, no air discharge or creeping discharge along the funnel portion 3 will occur (t
The conventional cathode ray tube is configured as described above, and even when a high voltage of 20 to 30 Kv is applied to the internal conductive film 8 through the contactor 12 and the anode button 11, it is easy to apply.High voltage application in a flat cathode ray tube Fig. 6 is a side sectional view of a conventional flat-panel image display device, while referring to the conventional technology related to the terminal introduction structure. 20 is a face panel 2 having an anode portion 22 having a phosphor formed on its inner surface;
A through hole 20a is provided on the side surface of 0, through which a high voltage application terminal 23 can be inserted and sealed with a sealing glass 24.
The anode part 22 and the high voltage application terminal 23 are electrically connected by a conductor 25, and 26 is an electrode structure, which is attached to the rear container 21 by a support 27.
The introduction part of the high voltage application terminal 23 is covered with a cap 28 made of silicone rubber or the like, and since it is located on the side, it extends to the part exposed from the cabinet 29 on the outer surface of the face panel 20, that is, increases the creepage distance to the screen. Therefore, even if a conductor approaches the screen, no discharge will occur (~Problem to be Solved by the Invention) In all of the above conventional cases, the introduction part of the high voltage application terminal is located on the side surface of the vacuum envelope. However, since there is plenty of space and the creepage distance to the screen of the display device can be made sufficiently long, it is relatively easy to take measures to prevent discharge. When using a flat glass face panel, it is necessary to provide an introduction part in the rear container to introduce the high voltage application terminal from the side surface, and the anode part and high voltage application terminal inside the container need to be provided. However, in this case, there is not enough space and the creepage distance to the screen of the display device is shortened. The present invention solves the above-mentioned conventional problems, and aims to provide a flat panel image display device equipped with a high voltage application terminal that is safe and reliable from the viewpoint of preventing discharge. Means for achieving this object In order to achieve this object, the flat panel image display device of the present invention has the following configuration: (1) It is made of flat glass and has an anode portion for applying a high voltage to the inner surface. A flat panel image display device comprising a vacuum envelope formed by sealingly bonding a face panel and a rear container facing the face panel,
The high voltage application terminal led out to the outside of the vacuum envelope through the through hole provided in the face panel is sandwiched between the outer surface of the face panel and the outer surface of the face panel by an insulating member. (2) A face panel made of flat glass and having an anode portion for applying a high voltage to the inner surface, and a back container facing the same. This is a flat panel image display device equipped with a vacuum envelope formed by sealingly bonding the face panel to the high voltage application terminal led out to the outside of the vacuum envelope through a through hole provided in the face panel. Effects of the structure in which the resin layer is interposed between the protective glass bonded to the outer surface of the panel. The high voltage application terminal led out to the outside of the vacuum envelope is held between the outer surface of the face panel by an insulating member L. At the sandwiched part, the high voltage application terminal, the insulating member and the king of the face panel are joined by low melting point glass. By doing so, at least the high voltage application terminals are not exposed on the outer surface of the face panel, and the exposed part of the high voltage application terminals is moved away from the display area to increase the creepage distance and is insulated within a limited narrow space. (2) Between the high voltage application terminal led out to the outside of the vacuum envelope through the through hole provided in the face panel and the protective glass bonded to the outer surface of the face panel. By disposing the high voltage application terminal in the resin layer interposed in the face panel, at least the high voltage application terminal is not exposed on the outer surface of the face panel, and the exposed portion of the high voltage application terminal is kept away from the display area to increase the creepage distance. DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional side view of a flat panel image display device according to an embodiment of the present invention.A vacuum envelope 1 includes a face panel 4 made of flat glass.
0 and a rear container 41, the face panel 40 has an anode portion 42 on the inner surface of which a phosphor is formed.A through hole 40a is provided at the peripheral edge of the face panel 40. Even if the high voltage application terminal 43 is inserted through and vacuum sealed with the sealing glass 44, the anode part 42 and the high voltage application terminal 43 are electrically connected by the conductor 45. 46 is an electrode structure, and the support Even though the high voltage application terminal 43 is attached to the rear container 41 by the body 47, the introduction part of the high voltage application terminal 43 is sandwiched between the high voltage application terminal 43 and the outer surface 40b of the face panel 40 by an insulating member such as a cover glass 48, and these high voltage application terminals 43 are By doing this, the exposed portion of the high voltage application terminal 43 can be moved away from the side edge 40c of the face panel 40 by bonding with the low melting point glass 49.
Since the creepage distance from the exposed part of the cabinet 50 (b) to the screen area can be increased, discharge will not occur even if a conductor approaches the screen.
L or L Since the narrow space between the surface 40b of the outer face panel 40 and the cabinet 50 can be insulated, it is effective for making the device thinner. However, FIG. 2 shows a second embodiment of the present invention. In this embodiment, the high voltage application terminal is the introduction terminal 51.
and a conductive film pattern 52 formed on the outer surface 40 b of the face panel 40 . 411 pole part 4
2 and the lead-in terminal 51 are electrically connected by the conductor 45, the lead-in terminal 51 and the conductive film pattern 52 are electrically connected, and the conductive film pattern 52 is electrically connected to the lead-out terminal 54 via the connecting pin 53. Even if the lead-in terminal 51, the conductive film pattern 52, the connection pin 53, and the lead-out terminal 54 are partially connected to the outer surface 40b of the face panel 40 by an insulating member such as the cover glass 55, the low melting point glass 3 is a side sectional view showing a third embodiment of the present invention. In this embodiment, the protective glass 57 is The outer surface 40b of the face panel 40 is laminated and bonded with a transparent ultraviolet curing resin 58, etc., and the high voltage application terminal 43 is disposed in the ultraviolet curing resin 58.The protective glass 57 is made of tempered glass or anti-reflection treated. Even if glass is used, such a configuration allows the exposed portion of the high voltage application terminal 43 to be moved away from the side edge 40c of the face panel 404, so that the exposed portion of the outer surface 40b of the face panel 40 from the cabinet 50, i.e. Since the creepage distance to the screen area can be increased, discharge will not occur even if a conductor approaches the screen (~L). Since they are laminated and bonded, an explosion-proof structure can be achieved.Insulation can be performed in the narrow space between the outer surface 40b of the face panel 40 and the cabinet 50, which is effective for making the device thinner. As described above, the present invention has the following effects: By sandwiching the high voltage application terminal, the insulating member, and the face panel between the outer surface of the face panel and the low melting point glass at the sandwiching part,
At least the high voltage application terminal is not exposed on the outer surface of the face panel, and the exposed part of the high voltage application terminal can be moved away from the screen area and the creepage distance can be increased, so even if a conductor approaches the screen, discharge will not occur. There is no way that this will happen.
Furthermore, the high voltage application terminals can be insulated in a limited narrow space, which is effective for thinning the device. By arranging the high voltage application terminal led out to the outside in a resin layer interposed between the protective glass bonded to the outer surface of the face panel, the high voltage application terminal is exposed at least on the outer surface of the face panel. Since the exposed part of the high voltage application terminal can be moved away from the screen area and the creepage distance can be increased, discharge will not occur even if a conductor approaches the screen. Therefore, the present invention can realize a flat panel image display device equipped with a high voltage application terminal that is safe and highly reliable from the viewpoint of preventing discharge.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a flat panel image display device according to an embodiment of the present invention. FIG. 2 is a side sectional view of a flat panel image display device according to a second embodiment of the present invention. A side cross-sectional view of a flat panel image display device according to the third embodiment. FIG. 4 is a partially cutaway side view of a conventional cathode ray tube. FIG. 5 is an enlarged cross-sectional view of an anode button portion. FIG. 6 is a conventional flat panel image display device. This is a side sectional view of the vacuum envelope 40...face spring/41.
... Back container 42 ... Anode starch 43 ... High voltage application terminal, 48 ... Cover glass (insulating member), 4
9... Name of low-melting point agent: Patent attorney Shigetaka Awano Haka 1 name map sword bar glass (inkstone line e morning)

Claims (4)

[Claims] (1) A flat type image display device made of flat glass and equipped with a vacuum envelope formed by sealingly bonding a face panel having an anode portion for applying a high voltage to the inner surface and a rear container facing the face panel. A high voltage application terminal led out to the outside of the vacuum envelope through a through hole provided in the face panel is sandwiched between the outer surface of the face panel and the outer surface of the face panel by an insulating member; A flat panel image display device, characterized in that the high voltage application terminal, the insulating member, and the face panel are bonded to each other by low melting point glass at a portion thereof. (2) A flat type image display device made of flat glass and equipped with a vacuum envelope formed by sealingly bonding a face panel having an anode portion for applying a high voltage to the inner surface and a rear container facing the face panel. A resin interposed between a high voltage application terminal led out to the outside of the vacuum envelope through a through hole provided in the face panel and a protective glass bonded to the outer surface of the face panel. A flat panel image display device characterized in that it is arranged in a layer. (3) The high voltage application terminal comprises an introduction terminal inserted into the through hole and a conductive film pattern formed on the outer surface of the face panel, and the two are electrically connected. Flat panel image display device. (4) The flat panel image display device according to claim 2, wherein the protective glass covers the entire outer surface of the face panel.