OLED-TV|Laser-TV|SED|Display|FED|

Canon SED-Television Prototype

Canon SED-Television Structure

Like CRT systems, SEDs are self-emitting displays, based on a principle that utilizes the collision of electrons with a phosphor-coated screen. While offering the same fast video response and high contrast as CRTs, because they do not require laser beam deflection, SEDs combine a slim body design with high-definition, low-distortion imaging performance.

Electron emitters, which fulfill the role that the electron gun serves in CRT systems, are distributed in a number equal to the number of pixels on the display. The electron emitters, at the heart of the SED, are characterized by a "nanogap," an extremely narrow gap measuring only a few nanometers in width, formed between two electrodes on the electron-emitting layer. When voltage of approximately 10 volts is applied, electrons are emitted from one side of the nanogap. Some of the electrons are accelerated by voltage of roughly 10 kV applied between the glass substrates, striking the phosphor coating and emitting light.

Interview with Canon product manager about SED-Television