Image display device

An image display device and potential technology, applied in the direction of image/graphic display tubes, discharge tubes, screen tubes, etc., can solve the problems of increased electric field strength, breakdown, etc., to reduce the frame area, reduce the depth, and improve insulation The effect of breakdown voltage

Inactive Publication Date: 2008-02-27
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in a structure in which an electrode whose potential is specified to be lower than the anode potential is provided on the surface of the same member as the region where the anode potential is specified above, the electric field outside the potential regulation electrode (the region farther from the anode electrode) can be weakened, so the potential The design of the outer region of the predetermined electrode is easy, but conversely, if the distance between the potential regulation electrode 5102 and the anode electrode 5101 is too small in order to reduce the size outside the image display region, the gap between the anode electrode and the potential regulation electrode will be reduced. The electric field strength increases, and there will be problems such as breakdown in this part

Method used

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no. 1 Embodiment

[0058] Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1A , 1B and 2 . FIG. 1 is a schematic plan view of an image display device according to a first embodiment of the present invention viewed from a flat panel side. Fig. 2 is a schematic cross-sectional view taken along line 2-2 of Fig. 1A and Fig. 1B .

[0059] The flat plate 1006 has an anode electrode 1101 including an image display area, and an anode potential is supplied through a high-voltage extraction part 1110 . A high-voltage lead-in terminal (not shown) is provided on the side of the plate 1006 in the high-voltage take-out portion 1110, and the high-voltage lead-in terminal is connected to a high-voltage power source. In addition, around the anode electrode 1101 and the high-voltage extraction part 1110 on the plate 1006, a first potential regulating member 1102 is provided around which is defined as a ground potential (hereinafter referred to as "GND potential")...

no. 2 Embodiment

[0085] Next, a second embodiment of the present invention will be described with reference to FIG. 5 . Fig. 5 is a schematic sectional view of an image display device according to a second embodiment of the present invention.

[0086] The image display device of the second embodiment is also the same as that of the first embodiment, and the plate 1006 has an anode electrode 1101 enclosing an image area, and a first potential regulating member 1102 arranged around it. Accordingly, compared with the first potential regulating member 1102, the electric field in the outer portion can be relaxed, and breakdown can be prevented from occurring between the side wall or structure (not shown) and the anode electrode. In addition, on the flat plate 1006, the second potential regulating member 1103, which is the characteristic structure of the present invention, is disposed on the back of one of the anode electrode 1101 and the first potential regulating member 1102. Furthermore, the sec...

no. 3 Embodiment

[0090] Next, a third embodiment of the present invention will be described with reference to FIG. 6 . Fig. 6 is a schematic sectional view of an image display device according to a third embodiment of the present invention.

[0091] In this embodiment, as shown in FIG. 6, the second potential regulating member 1103 is formed from the end of the plate 1006 on the atmospheric side of the plate 1006 (the back side of the anode electrode 1101, etc.) to the connection with the first potential regulating member 1102. The metal portion of the display panel frame 1104 is in contact with a region where the orthographic projection of the end portion on the side of the anode electrode 1101 is in contact. That is, the second potential regulating member 1103 is arranged to overlap the entire orthographic projection of the first potential regulating member 1102 . The second potential regulation member 1103, that is, the metal portion of the display panel frame 1104 is regulated as the GND ...

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PUM

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Abstract

An image display device is provided which is capable of increasing a dielectric voltage while reducing a depth and a frame region. The image display device is provided with a rear plate having surface conduction electron-emitting devices that are electron beam source and a faceplate having an anode electrode and a first potential regulating member on an identical surface. The anode electrode and the first potential regulating member are arranged separately from each other. The anode electrode is regulated to an electron accelerating potential. The first potential regulating member is regulated to a potential lower than that of the anode electrode. A second potential regulating member regulated to a potential lower than that of the anode electrode is provided at least in the vicinity of an end of the first potential regulating member on the anode electrode side on a surface on the opposite side of a surface having the first potential regulating member of the faceplate.

Description

technical field [0001] The present invention relates to an image display device using electron beams of a field emission display (FED). Background technique [0002] Conventionally, image display devices typified by CRTs (cathode ray tubes) have sought to further increase in size, and research has been conducted for this purpose. Furthermore, as the size of the image display device is increased, reduction in thickness, weight reduction and cost reduction of the device have become important issues. However, CRTs use deflection electrodes to deflect electrons accelerated at high voltages to excite phosphors on the panel. In principle, a large depth is required to increase the size of the CRT, making it difficult to reduce the thickness and weight of the device. Therefore, the inventors of the present invention conducted research on an image display device using a surface conduction type electron-emitting element as an electron beam source, as an image display device that solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J31/12H01J29/02H01J29/88H01J1/316H01J1/62H01J29/08H01J29/89
CPCH01J29/08
Inventor 大西智也
Owner CANON KK
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