Patent · US Expired

Electron beam scannable LED display device

US4620132A · kind A · utility

5Cited by

9References

15Claims

0Family size

Assignee

AT&T Bell Laboratories · US

Inventors

Eugene I. Gordon · Madison, US
Uri Levy · Rehovot, IL

Key dates

Filing date	Apr 1, 1983
Grant date	Oct 28, 1986
Priority date	—
Expiry date	Apr 1, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH01S5/06243
WIPO fieldOptics
WIPO sectorInstruments

Abstract

In a CRT display device the target comprises a multilayered semiconductor including a p-n junction and at least one current-blocking layer. The e-beam is locally absorbed in the current-blocking layer so as to open a narrow zone which allows charge to flow through the forward biased p-n junction. The injection current produces a local spot of light which radiates from the opposite side of the device and whose position is varied by scanning the e-beam. In one embodiment the current-blocking layer is a semi-insulating semiconductor layer, and in another embodiment the current-blocking layer comprises the base of a normally cut-off transistor.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.