| Patent application number | Description | Published |
|---|
| 20090003630 | Electronic Device and Acoustic Playback Method - In a folding electronic device, a pair of micro-speakers is mounted in the upper housing, and a vibrating actuator is mounted in the lower housing. Both these micro-speakers and the vibrating actuator reproduce sound. The vibrating actuator causes the lower housing and external housing to vibrate, and in particular supplements the acoustic characteristics of the micro-speakers in the low-frequency region. Furthermore, in cases where sound is reproduced using the mobile terminal device constituting this electronic device, sound is reproduced by mounting the mobile terminal device in an external housing, charging device, or cradle. | 01-01-2009 |
| 20090045700 | PIEZOELECTRIC ACTUATOR AND ELECTRONIC DEVICE - There is provided a piezoelectric actuator and the like capable of efficiently transmitting vibration between an object (e.g., a housing of an electronic device) and a piezoelectric ceramic vibrator. The piezoelectric actuator | 02-19-2009 |
| 20090103767 | SPEAKER, IMAGE ELEMENT PROTECTIVE SCREEN, CASE OF TERMINAL AND TERMINAL - Arrangement of an internal component (not shown) arranged in the vicinity of the top side is different from that of the hinge side of an image element protective screen ( | 04-23-2009 |
| 20090253471 | PORTABLE TERMINAL DEVICE AND CASE FOR THE SAME - The present invention provides a portable terminal device, such as a portable telephone terminal device including a speaker sound hole in a case side and a main display portion in a case front, in which sound pressure of a terminal front direction can be increased. A sound generated from a speaker | 10-08-2009 |
| 20090264147 | TELEPHONE TERMINAL AND SIGNAL PROCESSING METHOD - A telephone terminal ( | 10-22-2009 |
| 20100086149 | ACOUSTIC PROCESSING SYSTEM AND METHOD FOR ELECTRONIC APPARATUS AND MOBILE TELEPHONE TERMINAL - An acoustic processing system for an electronic device includes: an equalizer processor which boosts or cuts a digital signal which has been subjected to an acoustic process for each of frequency components; a low-pass filter which extracts a low-range signal from the signal from the equalizer processor and outputs the signal; a high-pass filter which extracts a high-range signal from the signal from the equalizer processor and outputs the signal; a high-frequency compressor which compresses the high-range signal; an adder which generates an addition of the low-range signal and the compressed high-range signal; and a speaker which outputs a sound in accordance with the addition of the signal. | 04-08-2010 |
| 20100226513 | AUDIO CIRCUIT - An object is to provide an audio circuit in which flow of excessive current through a capacitive speaker and a drive circuit thereof can be prevented while degradation of sound quality of high-pitched tones is suppressed. The audio circuit for driving a capacitive speaker includes: a weighting circuit for performing weighting in conformity with frequency components of an audio signal; and a signal-voltage limiting compression circuit for compressing a signal, which is input to the drive amplifier or which has been output from the drive circuit, at a prescribed compression ratio in accordance with a difference voltage between the output signal of the weighting circuit and a preset threshold voltage when the weighted signal exceeds the threshold voltage. Alternatively, the audio circuit is provided with a signal-voltage limiting compression circuit for passing, with amplitudes unchanged, signal components below a prescribed frequency contained in the signal reproduced by the capacitive speaker and compressing amplitudes of signal components not less than the prescribed frequency at a prescribed compression ratio. | 09-09-2010 |
| 20100246863 | PIEZOELECTRIC ACOUSTIC DEVICE AND ELECTRONIC APPARATUS - A piezoelectric acoustic device comprises: at least two piezoelectric actuators; a support body that supports the at least two piezoelectric actuators; and a signal input unit that drives the at least two piezoelectric actuators at respective arbitrary times. At least one pair of piezoelectric actuators among the at least two piezoelectric actuators is arranged in such a manner that their sound radiation surfaces face each other with a predetermined gap. | 09-30-2010 |
| 20120106766 | ELECTRONIC DEVICE - The objective of the present invention is to provide an electronic device in which sound quality of the sound radiated from a panel is changeable. | 05-03-2012 |
| 20120119617 | PIEZOELECTRIC ACTUATOR AND AUDIO COMPONENTS - One object of the present invention is to an achieve increase of amplitude of vibrations and/or flattening of frequency dependence of the amplitude of a piezoelectric actuator. Piezoelectric actuator ( | 05-17-2012 |
| 20120257772 | ELECTRO-ACOUSTIC TRANSDUCER, ELECTRONIC APPARATUS, ELECTRO-ACOUSTIC CONVERSION METHOD, AND SOUND WAVE OUTPUT METHOD OF ELECTRONIC APPARATUS - There are provided a vibration film ( | 10-11-2012 |
| 20130043769 | OSCILLATOR - An oscillator includes a piezoelectric vibrator ( | 02-21-2013 |
| 20130049876 | OSCILLATOR - A second piezoelectric vibrator ( | 02-28-2013 |
| 20130064041 | OSCILLATOR AND ELECTRONIC DEVICE - In an oscillator ( | 03-14-2013 |
| 20130083630 | OSCILLATOR AND ELECTRONIC DEVICE - An elastic vibration plate ( | 04-04-2013 |
| 20130243224 | OSCILLATION DEVICE AND PORTABLE DEVICE - An oscillation device includes a first oscillator ( | 09-19-2013 |
