초록 ▼

A support member (20) for maintaining the distance between a face plate (30) and a rear plate (31) is interposed between the face plate (30) and the rear plate (31). An insulating film is formed on the support member (20) or its surface. An intermediate layer (21) is formed at a portion near the rea

A support member (20) for maintaining the distance between a face plate (30) and a rear plate (31) is interposed between the face plate (30) and the rear plate (31). An insulating film is formed on the support member (20) or its surface. An intermediate layer (21) is formed at a portion near the rear plate (31). The intermediate layer (21) is set at a low resistance and the same potential as that of the rear plate (31). As a result, an electron beam emitted from an electron-emitting portion near the support member (20) follows an orbit which is directed temporarily away from the support member and then comes close to the support member near the face plate (30) due to the steady charge-up of the support member. Then, the electron beam is irradiated on a defined position on the face plate (30).

대표청구항 ▼

1. An image forming apparatus comprising:a rear substrate having an electron-emitting device; a front substrate having an image forming member; and a support member for maintaining an interval between said rear substrate and said front substrate, wherein said support member has insulating properties

1. An image forming apparatus comprising:a rear substrate having an electron-emitting device; a front substrate having an image forming member; and a support member for maintaining an interval between said rear substrate and said front substrate, wherein said support member has insulating properties for maintaining a charge-up amount of said support member in a substantially stable state in driving said electron-emitting device, and comprises an electrode for applying a deflection force in a direction away from said support member to an electron emitted by said electron-emitting device, wherein said electrode is arranged on a portion of said support member near said rear substrate and is not arranged past a predetermined position on said support member, and wherein when a distance between said rear substrate and said front substrate is 0.5 mm to 10 mm, a size of a pixel formed on said front substrate upon reception of an emitted electron is 100 .mu.m to 1 mm, and an accelerating voltage for accelerating an electron emitted by said electron-emitting device toward said image forming member is 1 to 15 kV, and the distance between said rear substrate and the predetermined position is not more than 1/4 of the distance between said rear substrate and said front substrate.