Patents by Inventor Eiji Yamakawa
Eiji Yamakawa 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).
-
Publication number: 20240133824Abstract: A defect inspection device includes: an illumination optical system including a polarization element configured to switch polarization of irradiation light between first polarization and second polarization orthogonal to the first polarization; a polarization diffraction grating configured to emit diffraction light of a specific order of the irradiation light in a direction along a normal line of a sample stage surface, a diffraction efficiency of the specific order of the first polarization of the irradiation light is equal to or less than 20% of a diffraction efficiency of the specific order of the second polarization, the polarization diffraction grating being settable at a light collection position of the irradiation light on the sample stage surface and including an anisotropic pattern whose period is equal to or less than twice a wavelength of the irradiation light; a detection optical system.Type: ApplicationFiled: March 9, 2021Publication date: April 25, 2024Inventors: Yuta URANO, Eiji ARIMA, Hiromichi YAMAKAWA, Toshifumi HONDA
-
Publication number: 20240096667Abstract: A defect inspection device in which an optical axis of a detection optical system is inclined with respect to a surface of a sample, and an imaging sensor is inclined with respect to the optical axis, a height variation amount of an illumination spot in a normal direction of the surface of the sample is calculated based on an output of a height measuring unit, a deviation amount of the focusing position with respect to the light receiving surface in an optical axis direction of the detection optical system is calculated based on the height variation amount of the illumination spot, the deviation amount of the focusing position being generated accompanying a height variation of the illumination spot, and the focus actuator is controlled based on the deviation amount of the focusing position, and scattered light intensities at the same coordinates of the sample are added.Type: ApplicationFiled: January 29, 2021Publication date: March 21, 2024Inventors: Hiromichi YAMAKAWA, Toshifumi HONDA, Yuta URANO, Shunichi MATSUMOTO, Masaya YAMAMOTO, Eiji ARIMA
-
Publication number: 20240004349Abstract: A display apparatus includes a protecting plate formed of a material which transmits light, light transmitting type solar panel which is positioned below the protecting plate, a display below the light transmitting type solar panel, which is provided in contact with the light transmitting type solar panel, and which includes a display region which can be viewed from outside. An air layer which is positioned between the protecting plate and the light transmitting type solar panel, and at least one light reflection prevention layer on at least one of a first surface of the protecting plate facing the air layer and a second surface of the light transmitting type solar panel facing the air layer, wherein the display region of the display can be viewed from outside through the protecting plate, the at least one light reflection prevention layer, the air layer, and the light transmitting type solar panel.Type: ApplicationFiled: September 15, 2023Publication date: January 4, 2024Applicant: CASIO COMPUTER CO., LTD.Inventor: Eiji YAMAKAWA
-
Patent number: 11796965Abstract: A display apparatus includes the following. A protecting plate is formed of a material which transmits light. A light transmitting plate is positioned below the protecting plate and is positioned in contact with the protecting plate. A display is provided below the light transmitting plate and includes a display region which can be viewed from outside. An air layer is positioned between the light transmitting plate and the display. A light reflection prevention layer is provided on at least one of a surface of the light transmitting plate facing the air layer and a surface of the display facing the air layer. The protecting plate, the light transmitting plate, the display, the air layer, and the light reflection prevention layer are layered in a thickness direction of the protecting plate. A region in the protecting plate overlapped with the display region of the display includes a window with which waterproof inspection is performed.Type: GrantFiled: February 19, 2021Date of Patent: October 24, 2023Assignee: CASIO COMPUTER CO., LTD.Inventor: Eiji Yamakawa
-
Patent number: 11295686Abstract: A liquid crystal control circuit includes: a first terminal that outputs a rewriting signal for rewriting a plurality of pixels; a second terminal that periodically designates a start timing of the rewriting signal; a third terminal that outputs a polarity signal for designating polarity of AC voltage; a first circuit that identifies a next second inversion timing of any first inversion timing at which the polarity is inverted; a calculator that calculates a first start timing after the first inversion timing based on the start timing; a second circuit that determines whether the second inversion timing is within a period from a predetermined time before the first start timing to the first start timing; and an inversion unit that inverts polarity of the polarity signal after the rewriting signal starting from the first start timing is stopped, when the second inversion timing is within the period.Type: GrantFiled: September 8, 2020Date of Patent: April 5, 2022Assignee: CASIO COMPUTER CO., LTD.Inventors: Takahiro Ono, Fumiaki Ochiai, Yoshinori Asami, Eiji Yamakawa
-
Patent number: 11258292Abstract: An electronic device includes a rechargeable battery, a first battery charger that charges the rechargeable battery by power supplied from an external power supply, a second battery charger that charges the rechargeable battery by a solar panel, and a processor that charges the rechargeable battery to a first voltage by the first battery charger, and charges the rechargeable battery to a second voltage lower than the first voltage by the second battery charger.Type: GrantFiled: June 17, 2019Date of Patent: February 22, 2022Assignee: CASIO COMPUTER CO., LTD.Inventor: Eiji Yamakawa
-
Publication number: 20210263475Abstract: A display apparatus includes the following. A protecting plate is formed of a material which transmits light. A light transmitting plate is positioned below the protecting plate and is positioned in contact with the protecting plate. A display is provided below the light transmitting plate and includes a display region which can be viewed from outside. An air layer is positioned between the light transmitting plate and the display. A light reflection prevention layer is provided on at least one of a surface of the light transmitting plate facing the air layer and a surface of the display facing the air layer. The protecting plate, the light transmitting plate, the display, the air layer, and the light reflection prevention layer are layered in a thickness direction of the protecting plate. A region in the protecting plate overlapped with the display region of the display includes a window with which waterproof inspection is performed.Type: ApplicationFiled: February 19, 2021Publication date: August 26, 2021Applicant: CASIO COMPUTER CO., LTD.Inventor: Eiji YAMAKAWA
-
Publication number: 20200402474Abstract: A liquid crystal control circuit includes: a first terminal that outputs a rewriting signal for rewriting a plurality of pixels; a second terminal that periodically designates a start timing of the rewriting signal; a third terminal that outputs a polarity signal for designating polarity of AC voltage; a first circuit that identifies a next second inversion timing of any first inversion timing at which the polarity is inverted; a calculator that calculates a first start timing after the first inversion timing based on the start timing; a second circuit that determines whether the second inversion timing is within a period from a predetermined time before the first start timing to the first start timing; and an inversion unit that inverts polarity of the polarity signal after the rewriting signal starting from the first start timing is stopped, when the second inversion timing is within the period.Type: ApplicationFiled: September 8, 2020Publication date: December 24, 2020Inventors: Takahiro ONO, Fumiaki OCHIAI, Yoshinori ASAMI, Eiji YAMAKAWA
-
Patent number: 10847104Abstract: A dot matrix display device includes a pixel redraw control unit and a decoder unit. The pixel redraw control unit generates a gate selection signal identifying an address in one direction, a source selection signal identifying an address in another direction intersecting the one direction, and image data which correspond to a pixel electrode part based on a serial signal including an address signal identifying an address of the pixel electrode part and an image signal supplied to the pixel electrode part. The decoder unit supplies a gate signal which activates a gate signal line corresponding to the pixel electrode part based on the gate selection signal, generates a source signal which activates a source signal line corresponding to the pixel electrode part based on the source selection signal, and supplies the image data to the pixel electrode part corresponding to the activated source signal line.Type: GrantFiled: February 24, 2017Date of Patent: November 24, 2020Assignee: Kyocera CorporationInventors: Tomoo Kasuo, Eiji Yamakawa, Takanobu Suzuki
-
Patent number: 10824117Abstract: An electronic device includes: a TFT liquid crystal panel; a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel; and a processor that generates a common signal to be input to a common electrode of the TFT liquid crystal panel. The processor generates the common signal so as to have a waveform that differs between when the light source is not lit and when the light source is lit.Type: GrantFiled: November 5, 2018Date of Patent: November 3, 2020Assignee: CASIO COMPUTER CO., LTD.Inventor: Eiji Yamakawa
-
Publication number: 20200302886Abstract: A dot matrix display device includes a pixel redraw control unit and a decoder unit. The pixel redraw control unit generates a gate selection signal identifying an address in one direction, a source selection signal identifying an address in another direction intersecting the one direction, and image data which correspond to a pixel electrode part based on a serial signal including an address signal identifying an address of the pixel electrode part and an image signal supplied to the pixel electrode part. The decoder unit supplies a gate signal which activates a gate signal line corresponding to the pixel electrode part based on the gate selection signal, generates a source signal which activates a source signal line corresponding to the pixel electrode part based on the source selection signal, and supplies the image data to the pixel electrode part corresponding to the activated source signal line.Type: ApplicationFiled: February 24, 2017Publication date: September 24, 2020Applicants: CASIO COMPUTER CO., LTD., KYOCERA Display CorporationInventors: Tomoo KASUO, Eiji YAMAKAWA, Takanobu SUZUKI
-
Patent number: 10783845Abstract: A liquid crystal control circuit is provided for driving a MIP liquid crystal panel. The MIP liquid crystal panel has a plurality of pixels, each of which includes a memory element and a display element. The memory element holds electric potential depending on an image signal. The display element is applied voltage depending on the electric potential which the memory element holds. The liquid crystal control circuit includes an inversion unit that inverts polarity of AC voltage in a first mode in which an enable signal is output. The AC voltage being is applied to the display element in synchronization with outputting of the enable signal. The enable signal activates the image signal output to the MIP liquid crystal panel.Type: GrantFiled: March 19, 2019Date of Patent: September 22, 2020Assignee: Casio Computer Co., Ltd.Inventors: Takahiro Ono, Fumiaki Ochiai, Yoshinori Asami, Eiji Yamakawa
-
Publication number: 20190393715Abstract: An electronic device includes a rechargeable battery, a first battery charger that charges the rechargeable battery by power supplied from an external power supply, a second battery charger that charges the rechargeable battery by a solar panel, and a processor that charges the rechargeable battery to a first voltage by the first battery charger, and charges the rechargeable battery to a second voltage lower than the first voltage by the second battery charger.Type: ApplicationFiled: June 17, 2019Publication date: December 26, 2019Inventor: Eiji YAMAKAWA
-
Publication number: 20190295485Abstract: A liquid crystal control circuit is provided for driving a MIP liquid crystal panel. The MIP liquid crystal panel has a plurality of pixels, each of which includes a memory element and a display element. The memory element holds electric potential depending on an image signal. The display element is applied voltage depending on the electric potential which the memory element holds. The liquid crystal control circuit includes an inversion unit that inverts polarity of AC voltage in a first mode in which an enable signal is output. The AC voltage being is applied to the display element in synchronization with outputting of the enable signal. The enable signal activates the image signal output to the MIP liquid crystal panel.Type: ApplicationFiled: March 19, 2019Publication date: September 26, 2019Inventors: Takahiro ONO, Fumiaki OCHIAI, Yoshinori ASAMI, Eiji YAMAKAWA
-
Publication number: 20190295486Abstract: A liquid crystal control circuit includes: a first terminal that outputs a rewriting signal for rewriting a plurality of pixels; a second terminal that periodically designates a start timing of the rewriting signal; a third terminal that outputs a polarity signal for designating polarity of AC voltage; a first circuit that identifies a next second inversion timing of any first inversion timing at which the polarity is inverted; a calculator that calculates a first start timing after the first inversion timing based on the start timing; a second circuit that determines whether the second inversion timing is within a period from a predetermined time before the first start timing to the first start timing; and an inversion unit that inverts polarity of the polarity signal after the rewriting signal starting from the first start timing is stopped, when the second inversion timing is within the period.Type: ApplicationFiled: March 19, 2019Publication date: September 26, 2019Inventors: Takahiro ONO, Fumiaki OCHIAI, Yoshinori ASAMI, Eiji YAMAKAWA
-
Publication number: 20190137944Abstract: An electronic device includes: a TFT liquid crystal panel; a light source that emits light to be radiated onto a back face of the TFT liquid crystal panel; and a processor that generates a common signal to be input to a common electrode of the TFT liquid crystal panel. The processor generates the common signal so as to have a waveform that differs between when the light source is not lit and when the light source is lit.Type: ApplicationFiled: November 5, 2018Publication date: May 9, 2019Applicant: CASIO COMPUTER CO., LTD.Inventor: Eiji YAMAKAWA
-
LIQUID CRYSTAL DRIVING DEVICE, ELECTRONIC WATCH, LIQUID CRYSTAL DRIVING METHOD, AND RECORDING MEDIUM
Publication number: 20180240422Abstract: An electronic watch includes a liquid crystal driver to drive a liquid crystal panel in which a plurality of pixels are arranged, and a CPU to control the liquid crystal driver. The CPU instructs the liquid crystal driver to output image data to the pixels. The CPU instructs the liquid crystal driver to output AC voltage while reversing the polarity of the AC voltage in predetermined cycles to be applied to display elements included in the respective pixels. When a timing of reversing the polarity is within a period of output of the image data, the CPU delays the timing until after the period.Type: ApplicationFiled: February 13, 2018Publication date: August 23, 2018Inventors: Tatsuyoshi OMURA, Eiji YAMAKAWA, Jyunichi HIROKAWA, Takahiro ONO -
Publication number: 20180024619Abstract: Provided is a display device comprising: a display which has a normal display mode and a power saving display mode, wherein a display appearance in the power saving display mode is different from a display appearance in the normal display mode, and wherein a power consumption in the power saving display mode is less than a power consumption in the normal display mode; a sensor which detects a state of the display device; a timer which starts to measure time based on a detection result of the sensor; and a controller which switches the display mode of the display from the normal display mode to the power saving display mode in the case where the measured time of the timer is equal to or longer than predetermined transition time.Type: ApplicationFiled: June 28, 2017Publication date: January 25, 2018Applicant: CASIO COMPUTER CO., LTD.Inventors: Tomoo KASUO, Eiji YAMAKAWA
-
Patent number: 9523960Abstract: There is provided an illumination device including: a light guide plate in which a light diffusion pattern of diffusing incident light is formed to have density that is coarse on one side and gets denser toward the other side; a first light source which is provided on a side corresponding to the one side of the light diffusion pattern in the light guide plate; and a second light source which is provided on a side corresponding to the other side of the light diffusion pattern in the light guide plate.Type: GrantFiled: July 3, 2014Date of Patent: December 20, 2016Assignee: CASIO COMPUTER CO., LTD.Inventors: Kei Hanzawa, Eiji Yamakawa
-
Patent number: 9423774Abstract: An electronic timepiece includes a display section which displays time information and a light emitting section which illuminates a display surface of the display section by emitting light. A light emitting control section performs control to turn on the light emitting section by gradually increasing a light emitting amount of the light emitting section to a peak value in a predetermined brightening time according to a predetermined light emitting condition.Type: GrantFiled: June 1, 2015Date of Patent: August 23, 2016Assignee: CASIO COMPUTER CO., LTD.Inventor: Eiji Yamakawa