US 11,689,861 B2
Sound production device, display device, and terminal
Zehua Fan, Guangdong (CN); Zhijia Cui, Guangdong (CN); and Le Yang, Guangdong (CN)
Assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Dongguan (CN)
Filed by GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD., Guangdong (CN)
Filed on Dec. 22, 2021, as Appl. No. 17/559,072.
Application 17/559,072 is a continuation of application No. PCT/CN2020/097205, filed on Jun. 19, 2020.
Claims priority of application No. 201910579171.7 (CN), filed on Jun. 28, 2019.
Prior Publication US 2022/0116712 A1, Apr. 14, 2022
Int. Cl. H04R 7/02 (2006.01); H04R 7/16 (2006.01); H04R 9/02 (2006.01)
CPC H04R 7/02 (2013.01) [H04R 7/16 (2013.01); H04R 9/02 (2013.01); H04R 2499/15 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A sound production device for a display device, the display device comprising a display substrate, the display substrate having an opening area and a non-opening area, the sound production device comprising:
a first electrode layer arranged on the display substrate;
an insulating layer arranged on a side of the first electrode layer away from the display substrate;
an electromagnetic coil arranged on a side of the insulating layer away from the first electrode layer, wherein a vertical projection of the electromagnetic coil on the display substrate falls on the non-opening area, the insulating layer defines a via, and the electromagnetic coil and the first electrode layer are electrically connected through the via; and
a magnetic diaphragm arranged on a side of the electromagnetic coil away from the insulating layer and configured to vibrate and produce sounds in response to a magnetic field generated by the electromagnetic coil, wherein a vertical projection of the magnetic diaphragm on the display substrate falls on the non-opening area.