Device for driving light emitting element

Details Device for driving light emitting element Device for driving light emitting element

1996-02-26

1998-11-10

Bacares, Rafael

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

357186, H04B 1004

Patent

active

058352503

ABSTRACT:
A device for driving a light emitting element, including a DC power source for generating a DC current, a signal driving unit for controlling, in an on-off manner, the DC current generated in the DC power source on the basis of signal data with timing in accordance with the signal data, a light emitting element which is driven by the DC current controlled in the on-off manner by the signal driving unit and emits light when the DC current flows thereto, a high-speed pulse controlling unit for controlling, in an on-off manner, the DC current which drives the light emitting element at a sufficiently short period in comparison with the signal data to pulse the DC current, and a driving control unit for controlling the timing of on-off control of the high-speed pulse controlling unit in accordance with a required mean optical output.

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patent: 4816699 (1989-03-01), Mori et al.
patent: 5146464 (1992-09-01), Uemura
patent: 5287375 (1994-02-01), Fujimoto
Japanese Patent Laid Open No. 57-208738, Dec. 21, 1982 (Japanese Patent Appln. No. 56-94959, filed Jun. 18, 1981) & English translation of Title page and Claim 1.
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Japanese Patent Laid Open No. 62-286292, Dec. 12, 1987 (Japanese Patent Appln. No. 61-129639, filed Jun. 4, 1986) & English translation.
Japanese Patent Laid Open No. 63-828, Jan. 5, 1988 (Japanese Patent Appln. No. 61-144038, filed Jun. 20, 1986) & English translation of Title page and Claims 1-6.
Japanese Patent Laid Open No. 63-35032, Feb. 15, 1988 (Japanese Patent Appln. No. 61-179495, filed Jul. 30, 1986) & English translation of Title page and Claims 1-4.

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