Image display device

• US 20070273269A1
• Filed: 03/15/2007
• Published: 11/29/2007
• Est. Priority Date: 03/17/2006
• Status: Abandoned Application

• Current Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Kijima, Yuuichi, Sunahara, Kazuo, Sukigara, Yuichi
• Application Number:
  US11/724,620
• Publication Number:
  US 20070273269A1
• Time in Patent Office: Days
• US Class Current: 313/496
• CPC Class Codes: H01J 29/86 Vessels; Containers; Vacuum locks
• CPC Class Codes: H01J 31/127 using large area or array sources, i.e. essentially a source for each pixel group
• CPC Class Codes: H01J 9/261 the vessel being for a flat panel display for flat discharge lamps H01J9/268
• CPC Class Codes: H01J 9/385 Exhausting vessels

Abstract

A display panel has an evacuation port at one side thereof, and the opening area of the evacuation port increases toward the periphery of the display panel. The display panel also has a frame member in the opening, and the height of the frame member lowers toward the inside of the display panel. According to the invention, by improving the evacuation efficiency in the airtight container and improving the vacuum level in the display panel in a short period of time, the electron emission characteristic is stabilized and the lifetime thereof is increased, allowing a high-quality, reliable image display to be provided.

Claims

1. An image display including a display panel having an enclosure comprising:

a front substrate having a phosphor layer and an anode electrode;

a rear substrate that has electron sources and faces the front substrate with a predetermined gap therebetween; and

a frame disposed around a display area and between the front substrate and the rear substrate,

wherein the display panel has an opening configured such that the distance between the front substrate and the rear substrate increases toward the periphery of the display panel, and a frame member whose height decreases toward the inside of the display panel is fit into the opening for airtight sealing.

2. The image display according to claim 1, wherein the coefficient of thermal expansion of the frame member is substantially equal to or smaller than the coefficient of thermal expansion of the display panel.

3. The image display according to claim 2, wherein the frame member is made of glass material.

4. The image display according to claim 2, wherein the frame member is made of ceramic material.

5. The image display according to claim 2, wherein the opening is sealed in an airtight manner by the frame member with sealing material interposed between the frame member and the opening.

6. The image display according to claim 1, wherein the rear substrate includes

a plurality of scan signal electrodes that extend in one direction and are juxtaposed in another direction perpendicular to the one direction, scan signals successively applied to the plurality of scan signal electrodes in the other direction

a plurality of image signal electrodes that extend in the other direction and are juxtaposed in the one direction such that the image signal electrodes cross the scan signal electrodes

electron sources provided at intersections of the scan signal electrodes and the image signal electrodes and

feeding electrodes that connect the electron sources to the scan signal electrodes and the image signal electrodes, and

the opening is provided at a side of the display panel where electrode extensions of the scan signal electrodes and the image signal electrodes are not formed.

7. An image display comprising an enclosure comprising a first substrate on which electron emission elements are formed, a second substrate on which a phosphor surface is formed and a frame that connects the first substrate to the second substrate, the enclosure being evacuated,

wherein the first substrate includes a plurality of scan lines that extend in a first direction and are arranged in a second direction that crosses the first direction as well as a plurality of data lines that extend in the second direction and are arranged in the first direction, first electrodes connected to the scan lines and second electrodes connected to the data lines forming the electron emission elements, and

at least one of the surface of the frame that faces the first substrate and the surface of the frame that faces the second substrate is an inclined surface that inclines to the plane formed by the first and second directions, the height of the surface of the frame disposed outside the enclosure being higher than the height of the surface of the frame disposed inside the enclosure.

8. The image display according to claim 7, wherein the inclined surface is provided on the surface that faces the first substrate and the surface that faces the second substrate.

9. The image display according to claim 7, wherein the frame has a rectangular shape and the inclined surface is formed at a side of the rectangular frame.

10. The image display according to claim 7, wherein the portion of the first substrate or the second substrate that faces the inclined surface is an inclined surface.