Patents by Inventor Isamu Kawabe
Isamu Kawabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11842680Abstract: A semiconductor device includes the following: a light measuring instrument disposed opposite the display surface of a display panel provided with a self-emission element, and disposed for measuring the ambient-light illuminance of the display panel; a storage device configured to store a plurality of first measurements measured by the light measuring instrument in synchronization with a synchronizing signal of the display panel during a plurality of first measurement periods that are shorter than an ON/OFF period of the self-emission element; and a calculation unit configured to calculate the light emission illuminance of the self-emission element in accordance with the plurality of first measurements stored in the storage device, and configured to calculate the ambient-light illuminance by subtracting a value based on the light emission illuminance from a second measurement measured by the light measuring instrument during a second measurement period that is longer than the plurality of first measurement peType: GrantFiled: November 16, 2022Date of Patent: December 12, 2023Assignee: Sharp Semiconductor Innovation CorporationInventors: Isamu Kawabe, Takahiro Inoue, Takayuki Shimizu, Kohji Hamaguchi, Tetsuro Ikeda
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Patent number: 11488531Abstract: A proximity sensor comprises a light emitting element configured to emit light; a synchronization signal input unit configured to be input with a synchronization signal which is output from a display device and which indicates a rewrite timing of an image displayed on a display screen; and an emission controller configured to control emission of the light from the light emitting element, wherein the emission controller is configured to cause the light emitting element to start the emission of the light at a start timing set based on the rewrite timing at which rewriting of one of a plurality of scanning lines of the image is caused to start in the specific display region, and an emission time of the light from the light emitting element, and the emission controller is configured to cause the light emitting element to end the emission of the light before the rewrite timing comes.Type: GrantFiled: June 11, 2021Date of Patent: November 1, 2022Assignee: Sharp Semiconductor Innovation CorporationInventors: Kohji Hamaguchi, Takahiro Inoue, Masaya Ohnishi, Isamu Kawabe
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Publication number: 20210398486Abstract: A proximity sensor comprises a light emitting element configured to emit light; a synchronization signal input unit configured to be input with a synchronization signal which is output from a display device and which indicates a rewrite timing of an image displayed on a display screen; and an emission controller configured to control emission of the light from the light emitting element, wherein the emission controller is configured to cause the light emitting element to start the emission of the light at a start timing set based on the rewrite timing at which rewriting of one of a plurality of scanning lines of the image is caused to start in the specific display region, and an emission time of the light from the light emitting element, and the emission controller is configured to cause the light emitting element to end the emission of the light before the rewrite timing comes.Type: ApplicationFiled: June 11, 2021Publication date: December 23, 2021Inventors: KOHJI HAMAGUCHI, Takahiro INOUE, Masaya OHNISHI, Isamu KAWABE
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Patent number: 8823682Abstract: A proximity sensor (1) includes a state updating section (22) and a control section (5). The state updating section (22) updates state information. In a case where the state information is updated with a state (ST1) or a state (ST4), the control section (5) supplies, to the outside of the proximity sensor (1), a signal (S6) indicating that at an object (B) to be detected does not come close to the proximity sensor (1). In a case where the state information is updated with a state (ST2) or a state (ST3), the control section (5) supplies, to the outside of the proximity sensor (1), a signal (S6) indicating that the object (B) to be detected comes close to the proximity sensor (1).Type: GrantFiled: November 17, 2011Date of Patent: September 2, 2014Assignee: Sharp Kabushiki KaishaInventors: Isamu Kawabe, Takahiro Inoue
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Patent number: 8681192Abstract: The present invention provides a sensor device and an electronic apparatus each of which does not make malfunction derived from outside ambient light such as sunlight. In the sensor device, an ADC outputs, to one of two input terminals of a comparison circuit, second data which is a digital value ADCOUT corresponding to a current Iin?I1 being the result of subtraction from a current I1 from a current Iin and which is larger than a threshold Data_th.Type: GrantFiled: January 9, 2012Date of Patent: March 25, 2014Assignee: Sharp Kabushiki KaishaInventors: Takahiro Inoue, Isamu Kawabe
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Publication number: 20120188292Abstract: The present invention provides a sensor device and an electronic apparatus each of which does not make malfunction derived from outside ambient light such as sunlight. In the sensor device, an ADC outputs, to one of two input terminals of a comparison circuit, second data which is a digital value ADCOUT corresponding to a current Iin?I1 being the result of subtraction from a current I1 from a current Iin and which is larger than a threshold Data_th.Type: ApplicationFiled: January 9, 2012Publication date: July 26, 2012Inventors: Takahiro Inoue, Isamu Kawabe
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Patent number: 8217335Abstract: An optical modulation-type detection device has a noise detection mode having (i) an offset canceling (hereinafter referred to as “OC”) period in which (a) the light-reception signal pathway of a pulse signal converting section is cut off so that an offset of the pulse signal converting section is suppressed and (b) the light-reception signal pathway of the pulse signal converting section is reconnected while a state in which the offset is suppressed is being maintained, at an end of the OC period, and (ii) an asynchronous reception period in which whether or not asynchronous reception occurs is detected after the first period, and an object detection mode having a synchronous reception period in which whether or not synchronous reception occurs is detected after the asynchronous reception is not detected in the noise detection mode.Type: GrantFiled: August 27, 2009Date of Patent: July 10, 2012Assignee: Sharp Kabushiki KaishaInventors: Takuma Hiramatsu, Ryohhei Tada, Isamu Kawabe, Naruichi Yokogawa
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Publication number: 20120139877Abstract: A proximity sensor (1) includes a state updating section (22) and a control section (5). The state updating section (22) updates state information. In a case where the state information is updated with a state (ST1) or a state (ST4), the control section (5) supplies, to the outside of the proximity sensor (1), a signal (S6) indicating that at an object (B) to be detected does not come close to the proximity sensor (1). In a case where the state information is updated with a state (ST2) or a state (ST3), the control section (5) supplies, to the outside of the proximity sensor (1), a signal (S6) indicating that the object (B) to be detected comes close to the proximity sensor (1).Type: ApplicationFiled: November 17, 2011Publication date: June 7, 2012Inventors: Isamu KAWABE, Takahiro Inoue
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Patent number: 8050572Abstract: An abnormal pulse detection circuit in a receiver of the present invention includes: an incoming pulse edge detection circuit which detects the moment of rise of an input signal and outputs the result of the detection as an edge detection signal; a muting reference pulse generation circuit which generates a muting reference pulse based on the edge detection signal; a logic circuit which outputs a signal indicating a negative AND of the muting reference pulse and the input signal; a muting signal generation circuit which generates a muting signal from the output signal of the logic circuit; and a switching circuit which outputs the input signal or the muting signal. The receiver of the present invention can therefore reduce discomfort in hearing reproduced sound in case where a noise occurs in an audio signal due to a variation in pulse width.Type: GrantFiled: May 27, 2008Date of Patent: November 1, 2011Assignee: Sharp Kabushiki KaishaInventors: Isamu Kawabe, Naruichi Yokogawa
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Publication number: 20100067017Abstract: An optical modulation-type detection device has a noise detection mode having (i) an offset canceling (hereinafter referred to as “OC”) period in which (a) the light-reception signal pathway of a pulse signal converting section is cut off so that an offset of the pulse signal converting section is suppressed and (b) the light-reception signal pathway of the pulse signal converting section is reconnected while a state in which the offset is suppressed is being maintained, at an end of the OC period, and (ii) an asynchronous reception period in which whether or not asynchronous reception occurs is detected after the first period, and an object detection mode having a synchronous reception period in which whether or not synchronous reception occurs is detected after the asynchronous reception is not detected in the noise detection mode.Type: ApplicationFiled: August 27, 2009Publication date: March 18, 2010Applicant: SHARP KABUSHIKI KAISHAInventors: Takuma HIRAMATSU, Ryohhei TADA, Isamu KAWABE, Naruichi YOKOGAWA
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Publication number: 20080298816Abstract: An abnormal pulse detection circuit in a receiver of the present invention includes: an incoming pulse edge detection circuit which detects the moment of rise of an input signal and outputs the result of the detection as an edge detection signal; a muting reference pulse generation circuit which generates a muting reference pulse based on the edge detection signal; a logic circuit which outputs a signal indicating a negative AND of the muting reference pulse and the input signal; a muting signal generation circuit which generates a muting signal from the output signal of the logic circuit; and a switching circuit which outputs the input signal or the muting signal. The receiver of the present invention can therefore reduce discomfort in hearing reproduced sound in case where a noise occurs in an audio signal due to a variation in pulse width.Type: ApplicationFiled: May 27, 2008Publication date: December 4, 2008Applicant: SHARP KABUSHIKI KAISHAInventors: Isamu Kawabe, Naruichi Yokogawa