Abstract:
A piezoelectric vibration device for a mobile terminal is disclosed. A bimorph piezoelectric vibrator includes a pair of piezoelectric element layers connected to one of positive and negative poles and a middle electrode plate interposed between the piezoelectric element layers and connected to the other pole. The piezoelectric vibrator generates vibration due to up/down bending displacement by fixing both end portions thereof to an inner surface of a casing of a mobile terminal. A voltage-boosting transformer raises a power source voltage of a mobile terminal to a driving voltage. A driving chip receives the raised driving voltage from the voltage-boosting transformer and drives the piezoelectric vibrator. Weights are attached to at least one of both sides of the piezoelectric vibrator to amplify vibration. Insulation members are provided at both end portions of the piezoelectric vibrator to prevent electricity applied to the piezoelectric vibrator from leaking to the casing.
Abstract:
Provided is a piezoelectric element vibration apparatus that generates vibration by applying a driving voltage to a piezoelectric vibrator, wherein a piezoelectric element layer is arranged on an electrode substrate made of a conductive material, an insulation member for preventing the applied driving voltage from leaking is formed on the piezoelectric element layer, and the piezoelectric element vibration apparatus has various types of forms in order to attach and install the piezoelectric vibrator. As a result, the piezoelectric element vibration apparatus has the effects wherein: installation is possible simply by attachment, thereby simplifying the assembly process; installation in any position is possible because the thickness of the piezoelectric element vibration device is made to be thin; the vibration volume can increase and the vibration noise can decrease while minimizing the thickness.
Abstract:
A memory card system and related write method are disclosed. The method includes receiving a write request for a predetermined page; performing a write operation on a first log block that corresponds to a first data block including the page; receiving an update request for the page; and performing a write operation on a second log block that corresponds to the first data block. The memory card system includes: at least one non-volatile memory including a data block and a log block for updating the data block; and a memory controller controlling an operation of the non-volatile memory. During a write operation for a predetermined page, the controller controls writing of a first log block corresponding to a first data block including the predetermined page, and controls writing of a second log block during an update operation of the predetermined page.
Abstract:
The present invention relates to a protective case for preventing damage to a mobile terminal, comprising: an actuator (12) comprising a piezoelectric vibrating screen (17) formed by attaching a piezoelectric element layer (20) to at least one side of a substrate (18), at least one or more weight pieces (22) which are fixedly attached to the piezoelectric element layer (20) and increase the vibration force, and a bracket (24) provided so that both ends of the substrate (18) are fixedly attached thereto; an auxiliary battery (10) which supplies power to the actuator (12) and is used for charging in the case where a battery of a mobile terminal (4) is discharged or consumed; and a Bluetooth receiving module (30) for receiving a signal transmitted from a Bluetooth transmitting module (28) of the mobile terminal (4). As the actuator (12), which provides real-time vibration feedback, is installed in the inner side of the protective case (2)(2a) which is worn for preventing damage to the mobile terminal (4), the protective case has an effect of giving a user simultaneous sensory stimulation by providing the user with a haptic signal corresponding to an image and sound outputted from the mobile terminal (4) as a rapid vibration response. In addition, the protective case can transfer various vibration patterns including strong vibration and micro vibration as the vibration amount of the actuator (12) is adjusted according to the magnitude of vibration, or a vibration motor (14) is controlled so as to provide vibration feedback at low frequency, and thus, the protective case has an effect of giving the user a sense of realism.
Abstract:
The present invention relates to a vibrating mouse providing a haptic feedback corresponding to visual information, the vibrating mouse in which: a piezoelectric element layer, which has a piezoelectric effect, and a central electrode plate are integrally formed so as to constitute a piezoelectric vibration body; both ends of the piezoelectric vibration body are fixed so as to generate vibration by vertical bending displacement; one or more actuators, to which a weight piece for increasing vibration in the piezoelectric vibration body is attached and fixed, are provided inside a body of a vibrating mouse so as to respond, with varying vibrations in a high frequency band, thereby transmitting various amounts of vibration corresponding to the visual information, by means of a quick vibration response, and transmit visual information and vibratory tactility with a quick response speed such that the user can have a visual and tactile experience simultaneously.
Abstract:
Provided is a cooling spray device using a piezoelectric element, comprising an air spray body having a space part formed by coupling, to be airtight, upper and lower layer surfaces formed of resin and/or metal material and provided with a disc-type piezoelectric plate having the piezoelectric property to cross the space part, thereby dividing the space part into first and second chambers, wherein, at least one air pathway for connecting the space part to the outside so as to make air flow into or out from the space part is formed at one side of the air spray body, an air separation film formed by protruding towards the air pathway so as to separate air to be sucked in from air to be discharged is formed at one side of the piezoelectric plate.