Wisol Co., Ltd.

Samsung Electronics Co., Ltd.

Jae Hyung Choi

Yo Sep Choi

Jung Rae Noh

Yukihiro Noro

Sang Shin Lee

Hye Jin Choi

Bong Soo Kim

A piezoelectric vibration module includes a vibration plate adapted to have one end fixed and the other end not fixed and driven in a vertical direction based on the fixed first end, a first piezoelectric element attached to the top or bottom of the vibration plate and adapted to generate a vibration power when power is applied, and a weight formed in the other end of the top or bottom of the vibration plate and adapted to control the vibration frequency of the piezoelectric vibration module. The first piezoelectric element is attached to the top or bottom of the vibration plate with a predetermined interval from a fixed point at the one end of the vibration plate.

Piezoelectric vibration module

The present invention relates to a stacked piezoelectric ceramic element and can provide a stacked piezoelectric ceramic element produced by stacking two or more ceramic green sheets, the stacked piezoelectric ceramic element having a structure in which a ceramic porous or defective part constituting the stacked piezoelectric ceramic element is impregnated with an organic resin, thereby improving waterproof performance capable of preventing the deterioration of insulation resistance in a highly humid environment.

Stacked piezoelectric ceramic element

A memory system includes a memory device, and a memory controller. The controller adjusts a delay of a data strobe clock, performs at least one of a read test and a write test on the memory device, detect at least one data bit, which reduces at least one margin of a setup margin and a hold margin, from among a plurality of data bits, and adjusts a delay of the at least one data bit to allow the at least one margin to increase.

Memory system and memory control method

A button device includes a piezoelectric element which includes a piezoelectric body with one surface on which a first external electrode and a second external electrode are formed and a plate with one surface attached to the other surface of the piezoelectric body, a supporting plate disposed on the one surface of the piezoelectric body, a cover disposed on the other surface of the plate, a first spacer provided between an edge portion of the one surface of the plate and the supporting plate, a second spacer provided between at least a part of an edge portion of the other surface of the plate and the cover to provide a separation space between the plate and the cover, and a dot provided in the separation space to transfer an external force to the piezoelectric element or to transfer a vibration of the piezoelectric element to the cover.

Button device using piezoelectric element

A vibration module based on a piezoelectric device includes: a piezoelectric device; a vibration plate connected to one side of the piezoelectric device by a medium of an adhesive and an intermediate material; the intermediate material interposed between the piezoelectric device and the vibration plate; and a molding part formed on the side of the piezoelectric device where the intermediate material is not formed.

Growing community of inventors

Suwon-si, South Korea

Jae Hyung Choi