Title:
ELECTRON EMITTING ELEMENT AND ELECTRON SOURCE AND IMAGE FORMING APPARATUS USING THE SAME
Document Type and Number:
Japanese Patent JP3044433
Kind Code:
B2
Abstract:
PURPOSE: To prevent the burning of a fluorescent plate and improve the durability by combining a cantilever with an electron emitting element.
CONSTITUTION: An electron emitting element 4 is composed of a thin film 2, an electron emission part 3, element electrodes 5, 6, and element electrode wirings 9, 10. Electrode wiring patterns 11-13 are connected with respectively corresponding electrodes and proper voltage is applied to the electrodes through the wiring patterns, the cantilever 1 is bent and altered in z-direction due to the expansion and contraction of the piezoelectric thin film and the whole body of the element. The element 4 is formed on an insulating layer 14 and since an electric field covers over the element 4 in x-direction, the electron emission direction strongly depends on the inclination of the substrate on which the element 4 is set. Consequently, the electron emission angle can be altered and the radiation position on the fluorescent plate is altered by controlling the angle of the element 4 by the bending and altering of the lever 1. As a result, the emission angle of the element 4 can be controlled freely and, for example, in the case of the element 4 used as a display apparatus of a television, the convergence of electron distribution in the fluorescent plane can be avoided and deterioration of the fluorescent plate can be prevented.
Inventors:
Shigeki Matsutani
Masahiro Okuda
Masahiro Okuda
Application Number:
JP34548093A
Publication Date:
May 22, 2000
Filing Date:
December 22, 1993
Export Citation:
Assignee:
Canon Inc
International Classes:
H01J1/30; G09G3/22; G09G3/30; H01J1/316; H01J29/04; H01J31/12; H01J31/15; (IPC1-7): H01J1/316; H01J29/04; H01J31/12
Domestic Patent References:
| JP552507A |
Attorney, Agent or Firm:
Yoshio Toyota (1 outside)