Patents by Inventor Fumirou Matsuki
Fumirou Matsuki 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).
-
Patent number: 8629862Abstract: A display capable of performing ambient light detection with a high accuracy is provided. The display device is a display device having a backlight and a photo sensor for detecting ambient light and outputting a photocurrent according to an intensity of the ambient light, and further including a light-shielding member disposed below the photo-sensor for shielding light from the backlight; and a pseudo photo sensor disposed above the light-shielding member around the photo sensor. The pseudo photo sensor is made of the same material as the photo sensor, and formed in the same process as the photo sensor.Type: GrantFiled: February 17, 2010Date of Patent: January 14, 2014Assignee: Innolux CorporationInventors: Fumirou Matsuki, Kazuyuki Hashimoto
-
Patent number: 8284177Abstract: A display device and an electronic apparatus comprising the same are disclosed. The display apparatus includes a photo-sensor for detecting ambient light and outputting a photocurrent according to the intensity of the ambient light, wherein the display apparatus comprises a current sampling unit and a light detection control unit. The current sampling unit is configured to sample the photocurrent outputted from the photo-sensor and to output a plurality of sampling signals to indicate the magnitude of the photocurrent. The light detection control unit is configured to determine an average of the sampling signals outputted from the current sampling unit. The current sampling unit starts a next sampling period corresponding to the end of one of the sampling signals.Type: GrantFiled: March 17, 2010Date of Patent: October 9, 2012Assignee: Chimei Innolux CorporationInventor: Fumirou Matsuki
-
Patent number: 8269753Abstract: A display device capable of detecting the light intensity of ambient light with high accuracy is disclosed. The display device has a backlight light source and a photo sensing unit. The display device also includes a voltage supply unit for providing a voltage, which makes the photo sensing unit output a certain amount of photocurrent to the photo sensing unit; and a supply voltage control unit for modulating the voltage supplied to the photo sensing unit based on the operation status of the backlight light source. The supply voltage control unit controls the voltage supply unit by the way of outputting a voltage of a first voltage to the photo sensing unit while the backlight light source is operating; and outputting a voltage of a second voltage, which is different from the first voltage, to the photo sensing unit while the backlight light source is not operating.Type: GrantFiled: February 8, 2010Date of Patent: September 18, 2012Assignee: Chimei Innolux CorporationInventor: Fumirou Matsuki
-
Patent number: 8059115Abstract: A source driver circuit of an LCD apparatus with a small occupied area and low power consumption is disclosed. The source driver circuit comprises a reference voltage circuit, a negative voltage driving DAC, a positive voltage driving DAC, an invert amplifier, a non-invert amplifier and a voltage selector. The reference voltage circuit generates a reference voltage. The negative voltage driving DAC divides the display data into negative gradation voltages. The positive voltage driving DAC divides the display data into positive gradation voltages. The invert amplifier works as an analogue buffer for the negative gradation voltages for driving the LCD apparatus and the non-invert amplifier works as an analogue buffer for the positive gradation voltages for driving the LCD apparatus. The voltage selector provides the reference voltage to the positive and negative voltage driving DACs.Type: GrantFiled: March 17, 2009Date of Patent: November 15, 2011Assignee: Chimei Innolux CorporationInventors: Fumirou Matsuki, Kazuyuki Hashimoto
-
Publication number: 20110032229Abstract: A display device and an electronic apparatus comprising the same are disclosed. The display device can eliminate or reduce a noise effect on a result of detecting ambient light. The display device includes a light detecting device for detecting the ambient light. The light detecting device comprises a light detecting unit, a reference voltage generating unit and a comparing unit. The light detecting unit is configured to generate a light detecting voltage for indicating the intensity of the ambient light. The reference voltage generating unit is configured to generate a predetermined reference voltage. The comparing unit is configured to compare the light detecting voltage with the reference voltage, and includes a first input terminal for allowing the light detecting voltage to be inputted and a second input terminal, which has the polarity opposite to the polarity of the first input terminal, for allowing the predetermined reference voltage to be inputted.Type: ApplicationFiled: August 6, 2010Publication date: February 10, 2011Applicant: Chimei InnoLux CorporationInventor: FUMIROU MATSUKI
-
Publication number: 20100245309Abstract: A display device and an electronic apparatus comprising the same are disclosed. The display apparatus includes a photo-sensor for detecting ambient light and outputting a photocurrent according to the intensity of the ambient light, wherein the display apparatus comprises a current sampling unit and a light detection control unit. The current sampling unit is configured to sample the photocurrent outputted from the photo-sensor and to output a plurality of sampling signals to indicate the magnitude of the photocurrent. The light detection control unit is configured to determine an average of the sampling signals outputted from the current sampling unit. The current sampling unit starts a next sampling period corresponding to the end of one of the sampling signals.Type: ApplicationFiled: March 17, 2010Publication date: September 30, 2010Applicant: TPO DISPLAYS CORP.Inventor: FUMIROU MATSUKI
-
Publication number: 20100238150Abstract: A display capable of performing ambient light detection with a high accuracy is provided. The display device is a display device having a backlight and a photo sensor for detecting ambient light and outputting a photocurrent according to an intensity of the ambient light, and further including a light-shielding member disposed below the photo-sensor for shielding light from the backlight; and a pseudo photo sensor disposed above the light-shielding member around the photo sensor. The pseudo photo sensor is made of the same material as the photo sensor, and formed in the same process as the photo sensor.Type: ApplicationFiled: February 17, 2010Publication date: September 23, 2010Applicant: TPO DISPLAYS CORP.Inventors: Fumirou Matsuki, Kazuyuki Hashimoto
-
Publication number: 20100201277Abstract: A display device capable of detecting the light intensity of ambient light with high accuracy is disclosed. The display device has a backlight light source and a photo sensing unit. The display device also includes a voltage supply unit for providing a voltage, which makes the photo sensing unit output a certain amount of photocurrent to the photo sensing unit; and a supply voltage control unit for modulating the voltage supplied to the photo sensing unit based on the operation status of the backlight light source. The supply voltage control unit controls the voltage supply unit by the way of outputting a voltage of a first voltage to the photo sensing unit while the backlight light source is operating; and outputting a voltage of a second voltage, which is different from the first voltage, to the photo sensing unit while the backlight light source is not operating.Type: ApplicationFiled: February 8, 2010Publication date: August 12, 2010Applicant: TPO DISPLAYS CORP.Inventor: Fumirou Matsuki
-
Patent number: 7626428Abstract: A buffer circuit is provided, having an odd number of stages of inverting amplifiers, wherein the stages are capacitive coupled. A negative feedback path feeds back from an output terminal of the final stage of the inverting amplifiers to an input terminal of the initial stage. A reference current source is also provided. A first switch is provided between the adjacent stages of the inverting amplifiers and switched, depending upon a mode of operation. A second switch is provided for selectively driving at least a transistor(s) in the final stage to cause a current mirror circuit with the reference current source depending upon a mode of operation.Type: GrantFiled: June 8, 2006Date of Patent: December 1, 2009Assignee: TPO Hong Kong Holding LimitedInventor: Fumirou Matsuki
-
Publication number: 20090231321Abstract: A source driver circuit of an LCD apparatus with a small occupied area and low power consumption is disclosed. The source driver circuit comprises a reference voltage circuit, a negative voltage driving DAC, a positive voltage driving DAC, an invert amplifier, a non-invert amplifier and a voltage selector. The reference voltage circuit generates a reference voltage. The negative voltage driving DAC divides the display data into negative gradation voltages. The positive voltage driving DAC divides the display data into positive gradation voltages. The invert amplifier works as an analogue buffer for the negative gradation voltages for driving the LCD apparatus and the non-invert amplifier works as an analogue buffer for the positive gradation voltages for driving the LCD apparatus. The voltage selector provides the reference voltage to the positive and negative voltage driving DACs.Type: ApplicationFiled: March 17, 2009Publication date: September 17, 2009Applicant: TPO DISPLAYS CORP.Inventors: Fumirou MATSUKI, Kazuyuki HASHIMOTO
-
Publication number: 20090115463Abstract: A buffer circuit is provided, having an odd number of stages of inverting amplifiers, wherein the stages are capacitive coupled. A negative feedback path feeds back from an output terminal of the final stage of the inverting amplifiers to an input terminal of the initial stage. A reference current source is also provided. A first switch is provided between the adjacent stages of the inverting amplifiers and switched, depending upon a mode of operation. A second switch is provided for selectively driving at least a transistor(s) in the final stage to cause a current mirror circuit with the reference current source depending upon a mode of operation.Type: ApplicationFiled: June 8, 2006Publication date: May 7, 2009Applicant: TPO Hong Kong Holding LimitedInventor: Fumirou Matsuki
-
Publication number: 20090047029Abstract: A waveform shaping apparatus has a first integrating circuit 152, a second integrating circuit 153, and a first comparison circuit 154. The first and second integrated circuits 152 and 153 are connected in series with each other, and so operate that, when a voltage signal loner than a predetermined period and larger than a predetermined amplitude is fed to the first integrating circuit 152, the voltage signal is made higher than a first reference voltage and is then output to he second integrating circuit 153 and, when the voltage signal fed to the first integrating circuit 152 is shorter than the predetermined period, the voltage signal is made lower than the first reference voltage and is then outputted from the second integrating circuit 153. The first comparison circuit 154 compares a voltage contained in the voltage signal outputted from the second integrating circuit 153 with the first reference voltage, and outputs the comparison result.Type: ApplicationFiled: September 7, 2005Publication date: February 19, 2009Applicant: ROHM CO., LTD.Inventors: Fumirou Matsuki, Shinji Yano
-
Publication number: 20080284771Abstract: The present invention is to provide a display device having a pre-charge circuit that is simple in construction by eliminating the need for a pre-charge power supply. A pre-charge circuit pre-charges the plurality of source buses prior to driving a plurality of source buses by a source driver. In the pre-charge circuit, pre-charge lines are connected to the plurality of source buses at the time of pre-charging. Pre-charge control switches connect pre-charge capacitors alternately to power supplies or the pre-charge lines. The pre-charge capacitors are charged when connected to the power supplies. The pre-charge capacitors are used to pre-charge the plurality of source buses when connected to the pre-charge lines.Type: ApplicationFiled: April 7, 2008Publication date: November 20, 2008Applicant: TPO Displays Corp.Inventor: Fumirou Matsuki