Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Reexamination Certificate
2003-04-08
2004-11-23
Ward, John Anthony (Department: 2875)
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
C445S044000, C313S495000, C313S292000
Reexamination Certificate
active
06821179
ABSTRACT:
BACKGROUND
1. Field of the Invention
The present invention relates to a hermetically sealed container and an image forming apparatus using the hermetically sealed container.
2. Related Background Art
As a flat panel display, a vacuum fluorescent display utilizing a thermionic cathode, an image display utilizing cold cathodes such as a surface conduction electron emitting device, and the like are known.
Such flat panel image forming apparatuses are disclosed, for example, in Japanese Patent Application Laid-Open Nos. 10-236851, 10-188787, and the like. The schematic structure of such flat panel image forming apparatus is shown in FIG.
7
. In
FIG. 7
, numeral
101
denotes a face plate (front substrate),
102
denotes a rear plate (back substrate),
103
denotes an outer frame, and a hermetically sealed container
7
is constituted by bonding the abutment portions of the components
101
,
102
,
103
. In general, the abutment portions are bonded by adhesives such as a frit glass. Moreover, in the image forming apparatus shown in
FIG. 7
, electrons emitted from an electron source
109
are accelerated by an anode voltage applied to an image forming member
108
such as a phosphor, so that emission and display are performed.
FIG. 4
is a sectional view showing the basic constitution of the vacuum fluorescent display disclosed in the Japanese Patent Application Laid-Open No. 10-236851 among the above-described flat panel displays. In
FIG. 4
, numeral
14
denotes a front glass,
12
denotes a plate glass disposed opposite to the front glass, and
16
denotes a spacer glass disposed between two glasses at the peripheral edge of the front glass
14
and plate glass
12
. These constitute a vacuum fluorescent display
10
as a hermetically sealed container.
In
FIG. 4
, character W denotes the width of the spacer glass
16
, and T denotes thickness. Numeral
24
denotes a filament-like thermionic cathode which emits electrons,
30
denotes a phosphor layer which is irradiated with the electrons to obtain emission, and these components are disposed on the plate glass
12
.
SUMMARY
According to the present invention, there is provided a hermetically sealed container comprising: a front substrate; a back substrate disposed opposite to the front substrate; and an outer frame disposed between the front substrate and the back substrate. The front and back substrates, and the outer frame are bonded with an adhesive to form a hermetically sealed space. When a ratio W/T of the width W and thickness T of the outer frame is set to the aspect ratio A of the outer frame, 1.5≦A.
Moreover, according to the present invention, there is provided an image forming apparatus using a hermetically sealed container comprising: a front substrate having an image forming member and a conductive film; a back substrate disposed opposite to the front substrate and provided with an electron source; and an outer frame disposed between the front substrate and the back substrate. The front and back substrates, and the outer frame are bonded with an adhesive to form a hermetically sealed space. When a ratio W/T of the width W and thickness T of the outer frame is set to the aspect ratio A of the outer frame, 1.5≦A.
Furthermore, according to the present invention, when the ratio W/T of the width W and thickness T of the outer frame is set to the aspect ratio A of the outer frame, 1.5≦A≦30.
REFERENCES:
patent: 4618802 (1986-10-01), Schrank
patent: 5600203 (1997-02-01), Namikawa et al.
patent: 5952775 (1999-09-01), Sato et al.
patent: 0 660 357 (1995-06-01), None
patent: 7-235255 (1995-09-01), None
patent: 10-188787 (1998-07-01), None
patent: 10-236851 (1998-09-01), None
Truong Bao Q.
Ward John Anthony
LandOfFree
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