US 12,490,017 B2
Method and arrangement for producing sound in an electronic device
Petri Soronen, Oulu (FI); and Petteri Luukkanen, Oulu (FI)
Appl. No. 18/562,734
Filed by PS Audio Design Oy, Oulu (FI)
PCT Filed May 24, 2022, PCT No. PCT/FI2022/050351
§ 371(c)(1), (2) Date Nov. 20, 2023,
PCT Pub. No. WO2022/248768, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 20215622 (FI), filed on May 26, 2021.
Prior Publication US 2024/0244366 A1, Jul. 18, 2024
Int. Cl. H04R 1/24 (2006.01); H04R 9/06 (2006.01); H04R 17/00 (2006.01)
CPC H04R 1/24 (2013.01) [H04R 9/06 (2013.01); H04R 17/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An electronic device comprising a first part (201) and a second part (202), whereof said first part (201) is an outer cover or a part of the outer cover of the electronic device, and an arrangement for producing sound in the electronic device, the electronic device comprising:
a magnetic vibrator comprising a third part provided with permanent magnets and fastened to said first part of the electronic device, and a fourth part provided with permanent magnets and fastened to said second part of the electronic device, and at least one induction coil for generating audio-frequency vibrations between the first part and the second part by supplying to the induction coil a first electrical signal;
a piezoelectric vibrator comprising piezoelectric material for generating audio-frequency vibrations resulting from deformations of the material by supplying a second electrical signal to said material;
an audio amplifier common to said magnetic vibrator and said piezoelectric vibrator and having an audio output for supplying said first and second electrical signals from said audio output to said magnetic vibrator and said piezoelectric vibrator;
wherein said piezoelectric vibrator is fastened to the same first part of said electronic device as the third part of the magnetic vibrator, said first and second electrical signals are supplied from said audio output to said magnetic vibrator and said piezoelectric vibrator at opposite polarities,
wherein the polarity of each of said first electrical signal and said second electrical signal is determined according to a direction in which the polarity of the corresponding first electrical signal or the second electrical signal displaces said first part of the electronic device under action of the magnetic vibrator and under action of the piezoelectric vibrator.