JPH0451409Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a flat cathode ray tube device having a front panel section and a screen panel section disposed opposite thereto and having a fluorescent surface on its inner surface.

(Summary of the invention) The invention comprises a front panel part and a screen panel part disposed opposite to the front panel part and having a fluorescent surface formed on its inner surface, and an image on the fluorescent surface is viewed through the front panel part. In a flat cathode ray tube device, by attaching an opaque plate member shaped to match the external shape of the screen panel portion to the outer surface of the screen panel portion, the cathode ray tube device can be easily operated. It is possible to prevent the back of the screen panel from being seen through from the front panel side without generating dust during or after being stored in the case.

(Prior Art) As a flat cathode ray tube device that can configure a relatively thin television receiver, it has a front panel section and a screen panel section facing the front panel section, and has a fluorescent light on the inner surface side of the screen panel section. A so-called fluorescent surface is formed so that an image obtained on the fluorescent surface can be viewed through the front panel section.
A type called a reflective type is known.

Such a flat cathode ray tube device has a front panel section and a screen panel section that are made of transparent glass and are opposed to each other, and a frit seal section is formed on the opposing surface of each of them. The neck portion is joined to the portion and the screen panel portion by forming a frit seal portion on each opposing surface portion, and includes a tubular body formed flat as a whole. A fluorescent surface is formed on the inner surface of the screen panel section facing the front panel section, and an electron gun assembly is built into the network section, and the electron beam emitted from the electron gun assembly emits fluorescent light. The surface is scanned from the front panel side. The image formed on the fluorescent surface can be viewed from outside the front panel through the front panel.

In such flat cathode ray tube devices, the screen panel as well as the front panel are usually made of a transparent glass material. In such a case, the back of the surrounding area of the fluorescent surface of the screen panel may be seen through from the front panel side, and the area where circuit components inside the case are arranged may be undesirably viewed. This brings with it the inconvenience of becoming. So, for example,
As described in the specification of No. 60-67649, in a flat cathode ray tube device, a layer of black insulating paint is provided on the outer surface of the front panel portion of the tube body excluding the image viewing portion. A device has been proposed that prevents the back of the screen panel section from being seen through from the panel section side.

In such a flat cathode ray tube device, a front panel portion and a screen panel portion are joined facing each other, and a neck portion is further joined to form a tube body, and then black insulating paint is applied to the outer surface of the tube body. In the manufacturing process, first, the outer surface of the image viewing part of the front panel section is masked with adhesive tape, etc., and then the entire outer surface of the front panel section and screen panel section is masked. A black insulating paint is applied to the front panel and allowed to dry. After the black insulating paint has dried, the adhesive tape etc. stuck to the outer surface of the front panel is peeled off.
Minor adjustments will be made. According to the flat cathode ray tube device in which a layer of black insulating paint is provided on the outer surface of the tube body in this way, the outer surface of the peripheral part and side part of the fluorescent surface in the screen panel part is covered with the black insulating paint. When it is housed in the case, it is possible to prevent the part behind the screen panel part in the case, for example, where circuit components are arranged, from being viewed undesirably.

(Problems to be solved by the invention) However, in the flat cathode ray tube devices that have already been proposed as described above, black insulating paint is applied to the outer surface of the tube body to provide a layer of black insulating paint. For example, when or after being placed in a housing to form a television receiver, the layer of black insulating paint may partially peel off from the outer surface of the tube and cause damage inside the housing. There is a risk that the dust will be uttered. In addition, when forming a layer of black insulating paint on the outer surface of the tube, it is necessary to mask the outer surface of the image viewing part of the front panel and to remove the masking that has been applied. There is also the problem that the work steps required to complete the cathode ray tube device are complicated, resulting in a decrease in manufacturing efficiency.

In view of this, the present invention includes a front panel part, a screen panel part disposed opposite to the front panel part and having a fluorescent surface formed on its inner surface, and a neck part joined to the front panel part and the screen panel part. The image on the fluorescent surface can be viewed through the front panel, and the image on the fluorescent surface can be viewed through the front panel. It is an object of the present invention to provide a flat cathode ray tube device in which the back of a screen panel section is prevented from being seen through from the front panel section side without causing the generation of dust or the like inside the casing.

(Means for Solving the Problems) In order to achieve the above-mentioned object, a flat cathode ray tube device according to the present invention includes a front panel portion, a fluorescent surface disposed opposite to the front panel portion, and a fluorescent surface on the inner surface thereof. The outer shape of the screen panel part is made of It is constructed by disposing an opaque plate member molded into a matching shape and attached to the outer surface of the screen panel section.

(Function) In the flat cathode ray tube device according to the present invention configured as described above, after the tube body including the front panel section, the screen panel section, and the neck section is formed, the external shape of the screen panel section is changed. An opaque plate member molded into a shape that matches the above is fixed to the outside of the screen panel section, and this opaque plate member allows the fluorescent surface of the screen panel section to be illuminated from the front panel side when housed in the case. This prevents the back of the screen panel from being seen through the surrounding portions or side portions. The attachment of the opaque plate member to the outside of the screen panel section can be done extremely easily, and the layer of black insulating paint that occurs when a layer of black insulating paint is provided on the outside surface of the tube body can be easily installed. There is no problem of partial peeling off from the outer surface of the tube and the generation of dust inside the casing.

(Example) FIG. 1 shows an entire example of a flat cathode ray tube device according to the present invention, and FIGS. 2 and 3 show the following:
A partially cut away plan view and a side view of the example shown in FIG. 1 are shown.

In this example, a front panel section 11 and a screen panel section 12, which are made of a transparent glass material and are opposed to each other, are joined with a frit seal section 13a formed on their respective opposing surfaces. The front panel part 11 and the screen panel part 12 are connected to each other by forming a neck part 14 with a converging part at the end thereof and a frit seal part 13b at the front facing surface part, and forming a flat tube body 10 as a whole. It is equipped with The portion of the tube body 10 that faces the flat surface of the front panel portion 11 of the screen panel portion 12 is a slightly curved curved surface portion 12a, and a fluorescent surface 15 is formed on the inner surface of the curved surface portion 12a. .
Further, an electron gun assembly 16 is built into the network part 14, and the fluorescent surface 15 is scanned from the front panel part 11 side by an electron beam emitted from the electron gun assembly 16. When the fluorescent surface 15 is scanned by such an electron beam, the fluorescent surface 15 is located on the curved surface portion 12a of the screen panel section 12.
By being curved along the inner surface of the fluorescent surface 15, the incident angles of the electron beam at each part on the fluorescent surface 15 are not extremely different. The image obtained on the fluorescent surface 15 is
It is viewed from the outside through the front panel section 11.

An opaque plate member 17 shaped to match the external shape of the screen panel section 12 is disposed on the outer surface side of the screen panel section 12 of the tube body 10 . The opaque plate member 17 is made of, for example, a flame retardant material having high electrical resistance and made of black vinyl chloride, etc.
2, a rectangular curved plate portion 18 curved along the outer surface of a curved surface portion 12a having a fluorescent surface 15 provided on its inner surface, and this curved plate portion 18.
extends along the outer surfaces of the side wall portions 12b, 12c and 12d that extend to the end edges of the curved surface portion 12a of the screen panel portion 12, and the shapes of these side wall portions 12b, 12c and 12d. The side plate portions 19a, 19b, and 19c each have a shape corresponding to the above. The opaque plate member 17 formed into the shape described above is attached to the screen panel portion 12 of the tube body 10 so that the inner surface of the curved plate portion 18 is attached to the screen panel portion 12 as shown in FIGS. 2 and 3. The screen panel portion 12 is brought into contact with the outer surface of the curved surface portion 12a of the screen panel portion 12 without any gaps, and the inner surfaces of the side plate portions 19a, 19b, and 19c are in contact with the outer surfaces of the side wall portions 12b, 12c, and 12d of the screen panel portion 12 without any gaps. installed. The attachment of the opaque plate member 17 to the outer surface of the screen panel section 12 can be done, for example, by attaching the opaque plate member 1
The inner surface of the curved plate portion 18 of No. 7 is the screen panel portion 1
It is fixed to the outer surface of the curved surface portion 12a of No. 2 with an adhesive.

The tube body 10 has the opaque plate member 17 attached to the outer surface of the screen panel portion 12 in this manner.
, an image obtained on the fluorescent surface 15 formed on the inner surface of the curved surface section 12a of the screen panel section 12 is viewed through the front panel section 11. The peripheral portion of the fluorescent surface 15 in the curved surface portion 12a of 12 or the side wall portions 12b, 12
The opaque plate member 17 prevents the rear of the screen panel section 12 from being seen through through the windows c and 12d. Therefore, for example, when the tube body 10 to which the opaque plate member 17 is attached is housed in a predetermined case, the part behind the screen panel section 12 in the case, for example, where the circuit section is arranged, etc. This will prevent unwanted viewing.

Further, the attachment of the opaque plate member 17 to the screen panel portion 12 in the tube body 10 is extremely easy, and the screen panel portion 12
The opaque plate member 17 attached to the opaque plate member 17 has no possibility of generating dust or the like.

In the above example, the opaque plate member 17 is made of black vinyl chloride or the like, but the color of the opaque plate member 17 is not limited to black; for example, it may be white, yellow, or
It may also be made of red vinyl chloride or the like.
When the opaque plate member 17 having a color other than black is attached to the outer surface of the screen panel section 12, the image obtained on the fluorescent surface 15 formed on the inner surface of the screen panel section 12 is When viewed through the front panel section 11,
The depth can be felt by the thickness of the glass of the screen panel section 12, and as a result, an effect can be obtained in which the fluorescent surface 15 appears to be raised.

Furthermore, since the opaque plate member 17 is made of vinyl chloride or the like, as shown in FIG.
For example, characters 21 or other symbols can be easily printed on the inner surface of the curved plate portion 18. As shown in FIG. 5, for example, in the case where the opaque plate member 17 with characters 21 printed on the curved plate part 18 is attached to the screen panel part 12 of the pipe body 10, the characters 21 However, it can be viewed from outside the front panel section 11 through the front panel section 11 and the screen panel section 12, and, for example, a product using such an example can be promoted effectively.

(Effects of the invention) As is clear from the above explanation, the flat cathode ray tube device according to the invention has a front panel part, a screen panel part opposite to the front panel part with a fluorescent surface formed on its inner surface, and a front The screen panel portion of the tube body is provided with a tube body including a panel portion and a neck portion joined to the screen panel portion, and the image on the fluorescent surface is viewed through the front panel portion. The opaque plate member attached to the outer surface portion prevents the back of the screen panel portion from being seen through from the front panel side through the peripheral portion or side portion of the fluorescent surface of the screen panel portion.
Therefore, when a television receiver or the like is housed in a predetermined case, for example, a portion of the case behind the screen panel, where circuit components are disposed, may be undesirably viewed. This will prevent you from being seen. The attachment of the opaque plate member to the outer surface of the screen panel part is extremely easy and can be done easily, and the layer of black insulating paint that occurs when a layer of black insulating paint is provided on the outer surface of the tube body can be easily installed. Since there is no problem of dust being generated inside the case due to partial peeling off from the outer surface of the tube, it is a relatively easy work and can be easily removed during or after being stored in the case. It is possible to prevent the rear of the screen panel portion from being seen through without causing dust or the like to be generated inside the case.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an example of a flat cathode ray tube device according to the present invention, FIGS. 2 and 3 are a partially cutaway plan view and side view of the example shown in FIG. 1, respectively;
FIG. 4 is a perspective view showing an opaque plate member used in another example of the flat cathode ray tube device according to the present invention;
The figure is a plan view of another example of the flat cathode ray tube device according to the present invention. In the figure, 10 is a tube body, 11 is a front panel part,
12 is a screen panel part, 14 is a network part, 1
5 is a fluorescent surface, 16 is an electron gun assembly, and 17 is an opaque plate member.

Claims (1)

[Scope of Claim for Utility Model Registration] A front panel section, a screen panel section disposed opposite to the front panel section and having a fluorescent surface formed on its inner surface, and the screen panel section having an electron gun assembly built therein. and a neck portion joined to an end of the front panel portion; and an opaque plate member formed into a shape that matches the external shape of the screen panel portion and attached to the outer surface portion of the screen panel portion. flat cathode ray tube device.