Abstract:
An image display device includes comb-shaped horizontal deflection electrodes (20 and 20a) disposed interleavingly in a first plane with a space therebetween for forming electron beam passages and comb-shaped vertical deflection electrodes (21 and 21a) disposed interleavingly in a second plane adjacent and parallel to the first plane. The capacitance between the horizontal deflection electrode (20) confronting with vertical deflection electrodes (21 and 21a) and the capacitance between the horizontal deflection electrode (20a) confronting with vertical deflection electrode (21 and 21a) are made equal to each other. Also, the capacitance of vertical deflection electrode (21) confronting with horizontal deflection electrodes (20 and 20a) and the capacitance of vertical deflection electrode (21a) confronting with horizontal deflection electrodes (20 and 20a) are made equal to each other, whereby the voltage effect induced by the other deflection electrode can be canceled by each other and a good quality image can be obtained.
Abstract:
A method of driving an image display device is disclosed in which electron beams from line cathodes (1) are impinged upon a display screen (9) through beam modulating and deflecting electrodes (6, 7, 7′, 8, 8′) to display an image. Each beam roughly lands onto a predetermined position on the screen by a stepped deflection voltage waveform to form a spot on the screen while the beam is deflected around the predetermined position by an unstepped deflection voltage waveform. The timing of application or the pulse width of a driving pulse signal for the beam modulating electrode is controlled in a form temporally related to the driving of the beam deflecting electrode to control the landing position or diameter of the spot on the screen. In the case where the driving pulse signal is a signal the pulse width of which is modulated by a video signal, the pulse width is changed in accordance with the level of the video signal and equally in positive and negative directions around the instant of time when a signal pulse having the minimum width necessary for representation as an image is to be generated.
Abstract:
An electron source (K, K') comprising: a linear thermionic cathode (3) for emitting an electron beam (6); an electrode (4) which is disposed substantially in parallel with the linear thermionic cathode (3) and is formed with an aperture (4a) for passing the electron beam (6) therethrough; and a support member (2) for supporting the linear thermionic cathode (3), which has a contact portion (2b) held in contact with at least a portion (3a) of the linear thermionic cathode (3); wherein the aperture (4a) of the electrode (4) is so disposed as to confront the contact portion (2b) of the support member (2).
Abstract:
An image display device includes comb-shaped horizontal deflection electrodes (20 and 20a) disposed interleavingly in a first plane with a space therebetween for forming electron beam passages and comb-shaped vertical deflection electrodes (21 and 21a) disposed interleavingly in a second plane adjacent and parallel to the first plane. The capacitance between the horizontal deflection electrode (20) confronting with vertical deflection electrodes (21 and 21a) and the capacitance between the horizontal deflection electrode (20a) confronting with vertical deflection electrode (21 and 21a) are made equal to each other. Also, the capacitance of vertical deflection electrode (21) confronting with horizontal deflection electrodes (20 and 20a) and the capacitance of vertical deflection electrode (21a) confronting with horizontal deflection electrodes (20 and 20a) are made equal to each other, whereby the voltage effect induced by the other deflection electrode can be canceled by each other and a good quality image can be obtained.
Abstract:
An evacuated flat panel device comprises an envelope including a face plate (1), an anode (3) and a fluorecent layer (5). Deposited on the back plate (11) are cathode (9) and a plurality of struts (S) for passing a micro current between electrodes in order to prevent an unfavorable spark discharge from taking place between the electrodes (3) and (9).