Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate
2000-02-22
2003-08-12
O'Shea, Sandra (Department: 2875)
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
C313S422000, C313S553000, C313S634000, C313S582000
Reexamination Certificate
active
06605893
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a flat image display apparatus used as an apparatus for displaying characters or images as a display, a message board, or the like used for a television receiver or a computer, among some others. The invention also relates to a vacuum container provided for the flat image display apparatus, and a method of manufacture therefor as well.
2. Related Background Art
The flat image display apparatus has advantages such that the apparatus is not bulky when set up in a room or the like, its appearance is good, and it is compact to make the required operation efficient when incorporating it in various kinds of equipment. This apparatus is, therefore, utilized as an apparatus to display characters or images as display, a message board, or the like used for a television receiver or a computer, among some others. Further, with a higher set-up freedom, it is practiced to hang up the apparatus on the wall or set it into the ceiling or the like.
In the recent years, there have been produced and used as the flat image display apparatuses which utilize electron emission, such as the surface conduction electron-emitting display (hereinafter referred to as the “SED”), not to mention the field emission display that utilizes the field emission of electron.
FIG. 12
is a cross-sectional view which shows a vacuum container to illustrate the conventional example of the SED, that is, one of the flat image display apparatuses described above.
In
FIG. 12
, a reference numeral
101
designates the face substrate that mounts thereon a phosphor
104
;
102
, the rear substrate arranged to face the face substrate
101
, which mounts thereon the electron-emitting device
105
;
103
, the outer frame arranged between the face substrate
101
and the rear substrate
102
;
107
, the frit glass that forms a closed container by adhesively bonding the face substrate
101
, the rear substrate
102
, and the outer frame
103
; and
106
, the vacuum container which comprises the face substrate
101
, the rear substrate
102
, the outer frame
103
and the frit glass
107
. The inner pressure of the vacuum container
106
is the vacuum of as high as 8×10
−7
Pa or less, and the high vacuum is maintained by the provision of the getter members which are not shown.
The specific technologies and techniques of the flat image display apparatus, and the vacuum container described above are disclosed in Japanese Patent Application Laid-Open No. 7-235255 and others.
The outer frame
103
is vacuum sealing means together with the frit glass
107
. Then, it also serves as means for regulating the distance between the face substrate
101
and the rear substrate
102
. Currently, it is demanded to make the substrates, such as the face substrate
101
and the rear substrate
102
, thinner still in order to lighten and thin the flat image display apparatus more. However, the utilization of a thinner substrate may lead to the lowered robustness of the vacuum container
106
, that is, the vacuum container
106
is subjected to a greater warping due to its own weight eventually. As a result, there is a need for the provision of facilities to carry the vacuum containers
106
more carefully at the time of manufacture, which inevitably leads to the higher costs of manufacture.
In order to secure the robustness of the vacuum container
106
, it is required to make the frame width of the outer frame
103
wider, among some other measures.
However, if the outer frame
103
should have a wider width, the coating of the frit glass
107
tends to become uneven, thus inviting the generation of air bubbles in the interior thereof when the vacuum sealing is executed uniformly with the adhesive bonding using the frit glass
107
. As a result, there occurs the slow leakage of vacuum or some other drawback. Such drawbacks may result in the problem of the lower production yield.
SUMMARY OF THE INVENTION
With a view to solving the problems discussed above, the present invention is designed. It is an object of the invention to provide a light weight, and highly robust vacuum container having a good sealing function.
In order to achieve the object, the vacuum container of the present invention for a flat image display apparatus comprises a rear substrate having an electron-emitting device mounted thereon; a face substrate arranged to face the rear substrate, having thereon a phosphor emitting light when the electron emitted from the electron-emitting device collides therewith; and an outer frame arranged between the face substrate and the rear substrate. For this vacuum container, the outer frame is provided with a plurality of frame members.
Also, for the vacuum container of the present invention described above, the outer frame portion is provided with a first frame member enclosing the electron-emitting device, and a second frame member enclosing the first frame member, and the first frame member, the face substrate, and the rear substrate surround and form a first imaging space, and the first frame member, the second frame member, the face substrate, and the rear substrate surround and form a first interframe space.
Further, for the vacuum container of the present invention described above, the outer frame portion is provided further with a third frame member enclosing the second frame member, and the second frame member, the third frame member, the face substrate, and the rear substrate surround and form a second interframe space.
Further, for the vacuum container of the present invention described above, getter means is arranged in the first interframe space.
Further, for the vacuum container of the present invention described above, getter means is arranged in the second interframe space.
Further, for the vacuum container of the present invention described above, a cut-out structure is provided for the first frame member, and the imaging space and the first interframe space are continuous.
Further, for the vacuum container of the present invention described above, the imaging space and the first interframe space are independent.
Further, for the vacuum container of the present invention described above, a cut-out structure is provided for the second frame member, and the first interframe space and the second interframe space are continuous.
Further, for the vacuum container of the present invention described above, the first interframe space and the second interframe space are independent.
Further, for the vacuum container of the present invention described above, the cut-out structure is a cut-out groove.
Further, for the vacuum container of the present invention described above, the cut-out structure is a gap.
Further, for the vacuum container of the present invention described above, a part of the plural frame members is an air-tight frame.
Further, for the vacuum container of the present invention described above, a non-air-tight frame is provided for the inner side of the air-tight frame.
Further, for the vacuum container of the present invention described above, getter means is provided for the inner side of the air-tight frame.
Further, for the vacuum container of the present invention described above, non-air-tight frame is provided for the outer side of the air-tight frame.
Further, for the vacuum container of the present invention described above, the plural frame members are glass.
Further, for the vacuum container of the present invention described above, the plural frame members are frit glass.
Further, for the vacuum container of the present invention described above, the sectional shape of the plural frame members is substantially square.
Further, for the vacuum container of the present invention described above, the electron-emitting device is a surface conduction electron-emitting device.
Further, for the vacuum container of the present invention described above, the electron-emitting device is a field emission electron-emitting device.
Further, for the vacuum container of the present invention described above, the frame member i
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
O'Shea Sandra
Truong Bao
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