Image display apparatus
A technology for image display devices and substrates, which is applied in the direction of image/graphic display tubes, discharge tubes, screen tubes, etc., and can solve problems such as deterioration of image quality and insufficient reduction of charging of spacers, etc.
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Image
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Embodiment 1
[0077] In this embodiment, an image display device configured as shown in FIG. 1A is formed. as Figure 8 The insulating base 81 of the shown spacer 4, such as Figure 11 As shown, a glass with a length of 108 mm, a width of 2 mm, and a thickness of 0.26 mm, which is the same material as the back plate, was prepared, and the end was cut off by 0.03 mm in width and 0.03 mm in height. ( Figure 8 is a schematic cross-sectional view, please refer to the shape of the spacer Figure 11 ). As the high-resistance film 82 , a nitride film of W and Ge was deposited to a thickness of 200 nm by simultaneously sputtering W and Ge targets in a mixed atmosphere of argon gas and nitrogen gas using a sputtering apparatus. The resistivity of the fabricated W and Ge nitride film is 5.0×10 5 Ω·m.
[0078] The thickness T1 of the panel 1 = 2.8 mm, the thickness T2 of the back plate 2 = 2.8 mm, and the substrate spacing D = 2 mm. The inner dimensions of the side wall 3 are W1 = 112 mm in th...
Embodiment 2
[0091] Regarding Embodiment 2 of the present invention, only differences from Embodiment 1 will be described.
[0092] Figure 9 A schematic plan view of the image display device of this embodiment is shown. The symbols in the figure represent the same components as those in FIG. 1 . This example differs from Example 1 in that the shape of the spacer 4 is columnar. With such a configuration, the spacers 4 can be uniformly arranged, the abutting state can be stabilized, and there is an effect that the arrival position of the electron beam can be controlled with high precision.
[0093] In this embodiment, as the spacers 4, 504 glass strips as follows are prepared. That is, in the central part of the spacer (the center between the panel and the back plate), the cross-section cut by a plane parallel to the panel is a rectangle of 0.26 mm × 0.46 mm, and at the end of the spacer that is close to the face plate or the back plate Above, the cross-section cut by a plane parallel t...
Embodiment 3
[0101] Regarding Embodiment 3 of the present invention, only differences from Embodiment 2 will be described.
[0102] Figure 10 A schematic plan view of the image display device of this embodiment is shown. The symbols in the figure represent the same components as those in FIG. 1 . The difference between this example and Example 2 is that the shape of the spacer 4 is a cylinder. With such a configuration, the spacers 4 can be uniformly arranged, the abutting state can be stabilized, and there is an effect that the arrival position of the electron beam can be controlled with high precision. Furthermore, since the cross section is circular, there is an advantage that assembly is easy because there is no rotation dependence like a polygonal column.
[0103] In this embodiment, as Figure 12 For the spacer 4 of the shape shown, prepare 504 pieces of cylindrical glass such that the diameter of the section cut at the center portion of the spacer (the center between the face p...
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