Definition

Ever wanted to take the best qualities of a CRT based TV and put them in a flat panel display? SED (Surface-conduction Electron-emitter Display) promises to do this with new technology developed by Cannon and Toshiba.

SED works similarly to CRT TVs, but without the tube. Each pixel in a SED HDTV is controlled by its own red, green, and blue electron emitter. This is in contrast to a tube based TVs use of a single red, green, and blue electron gun that scans the entire TV image. Each SED electron emitter is located millimeters from its own phosphorus coated pixel. The electrons from the emitters collide with the phosphorus coated screen to produce light. This is similar to how a CRT TV works, except SED technology does not require a tube for electronic beam deflection. Without the tube, SED HDTVs can be designed as a flat panel display.

CRT	SED

Speculated Upside

• High contrast ratios
• Great picture quality
• High refresh rate reduces motion blur
• Deep blacks
• Large viewing angles
• Fixed pixel display
• No convergence issues
• Low power

Speculated Downside

• Price
• Burn-in issues
• Low brightness levels

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