Patent · US Expired

Planar loudspeaker

US7187776B2 · kind B2 · utility

0Cited by

5References

7Claims

0Family size

Assignee

HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH · DE

Inventors

Wolfgang Bachmann · Grevenbroich, DE
Gerhard Krump · Rötz, DE
Hans-Jürgen Regl · Goldkronach, DE
Andreas Ziganki · Mettmann, DE

Key dates

Filing date	Jul 13, 2001
Grant date	Mar 6, 2007
Priority date	—
Expiry date	Jul 13, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH04R7/045
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The invention relates to a planar loudspeaker comprising a light, thin soundboard (2) which may be energized to produce multiply-reflected bending waves, a surrounding frame (3) holding the soundboard (2) in an articulated, shear-resistant manner; at least one driver (6, 7, 9, 10) connected to the soundboard (2) to energize the soundboard (2); and at least one bridge (13, 16, 18, 20, 22, 25), rigidly connecting the at least one driver (6, 7, 9, 10) to the frame (3), wherein the bridge or at least one of the bridges (13, 16, 18, 20, 22, 25) is connected to the damping board (14).

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