Patents by Inventor Masahiro Yoshiga
Masahiro Yoshiga 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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Publication number: 20190088232Abstract: The display panel includes a source line, a common voltage line, a gate line, and a pixel circuit. The pixel circuit includes a first capacitor, a first transistor, a sample circuit, and a memory circuit. The first capacitor is coupled to the common voltage line. The first transistor is coupled to the source line and the first capacitor. The sample circuit includes a second transistor, and the second transistor is coupled to the source line and the first capacitor. The memory circuit is coupled to the first transistor, the sample circuit, and the gate line.Type: ApplicationFiled: September 19, 2017Publication date: March 21, 2019Inventor: Masahiro Yoshiga
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Publication number: 20190066610Abstract: A pixel circuit includes a first capacitor, a second capacitor, a first transistor, a second transistor, and a third transistor. The first capacitor has a first terminal coupled to a common voltage line. The second capacitor has a first terminal coupled to a first control line. The first transistor has a first terminal coupled to a source line, a second terminal coupled to a second terminal of the first capacitor, and a control terminal coupled to a second terminal of the second capacitor. The second transistor has a first terminal coupled to the control terminal of the first transistor, and a control terminal coupled to a second control line. The third transistor has a first terminal coupled to a second terminal of the second transistor, a second terminal coupled to a third control line, and a control terminal coupled to the second terminal of the first transistor.Type: ApplicationFiled: August 28, 2017Publication date: February 28, 2019Inventor: Masahiro Yoshiga
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Publication number: 20180005591Abstract: A display including a pixel cell is provided. When the liquid crystal display is displaying a static image, the pixel cell is refreshed through a first period, a second period, and a third period in sequence. In the first period, the pixel cell is charged by a target voltage. In the second period, the pixel cell is charged by a post voltage. In the third period, the pixel cell is charged by a base voltage until next of the first period. The post voltage is between the target voltage and the base voltage. In addition, a driving method for a display is also provided.Type: ApplicationFiled: July 4, 2016Publication date: January 4, 2018Inventor: Masahiro Yoshiga
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Patent number: 9806197Abstract: A display device including a substrate, a first gate electrode, a second gate electrode, an active layer, and a first data electrode is provided. The active layer is disposed between the first gate electrode and the second gate electrode. And one of the first gate electrode and the second gate electrode is connected to the data line, so as to reduce the off leak current.Type: GrantFiled: July 13, 2016Date of Patent: October 31, 2017Assignee: Innolux CorporationInventor: Masahiro Yoshiga
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Patent number: 9779673Abstract: A display system is provided with a low frequency driving mode. A low frequency display interval of the display system is divided into a charge period and a suspend period in the low frequency driving mode. A backlight brightness of the display system is changed in the suspend period.Type: GrantFiled: August 11, 2015Date of Patent: October 3, 2017Assignee: INNOLUX CORPORATIONInventors: Yoshikazu Matsui, Masahiro Yoshiga
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Publication number: 20170248820Abstract: A transflective liquid crystal display includes a plurality of pixels. At least one of the plurality of the pixels includes a first sub-pixel having a blue color and a second sub-pixel having a color different from the blue color. Each of the first sub-pixel and the second sub-pixel has a transmissive region and a reflective region. A ratio of the transmissive region to the reflective region of the first sub-pixel is different from a ratio of the transmissive region to the reflective region of the second sub-pixel. A first voltage is applied to the first sub-pixel. A second voltage is applied to the second sub-pixel. The second voltage is different from the first voltage.Type: ApplicationFiled: February 25, 2016Publication date: August 31, 2017Applicant: Innolux CorporationInventors: Masahiro YOSHIGA, Yoshitaka HARUYAMA, Satoru TAKAHASHI
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Publication number: 20170047023Abstract: A display system is provided with a low frequency driving mode. A low frequency display interval of the display system is divided into a charge period and a suspend period in the low frequency driving mode. A backlight brightness of the display system is changed in the suspend period.Type: ApplicationFiled: August 11, 2015Publication date: February 16, 2017Inventors: Yoshikazu MATSUI, Masahiro YOSHIGA
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Publication number: 20160209694Abstract: A transflective liquid crystal display having a transmissive region and a reflective region and including a first substrate, a second substrate, a liquid crystal layer, a transmissive electrode, a reflective electrode, and a passivation layer is provided. The first substrate includes a thin film transistor element. The liquid crystal layer is disposed between the first substrate and the second substrate. The transmissive electrode and the reflective electrode are disposed on the first substrate, wherein the reflective electrode is arranged corresponding to the reflective region, and the transmissive electrode and the reflective electrode are coupled to the thin film transistor element. A common electrode disposed on the second substrate. The passivation layer is disposed on the first substrate or the second substrate, wherein the passivation layer is arranged corresponding to the reflective electrode and the passivation layer is disposed between the transmissive electrode and the common electrode.Type: ApplicationFiled: January 15, 2015Publication date: July 21, 2016Applicant: INNOLUX CORPORATIONInventors: Toshiya INADA, Minoru SHIBAZAKI, Masahiro YOSHIGA
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Publication number: 20160071493Abstract: A display device comprises data lines, pixel units and gate lines. The data lines are for providing pixel voltages. The pixel units are for displaying images in response to the pixel voltages. The pixel units comprise pixel capacitors and pixel switches for transmitting the pixel voltages from the data lines to the pixel capacitors. The gate lines are for controlling the pixel switches. During a suspend period, the pixel switches are turned off and a compensation voltage is applied to the gate lines or a light shield disposed along the gate lines.Type: ApplicationFiled: September 10, 2014Publication date: March 10, 2016Applicant: INNOLUX CORPORATIONInventor: Masahiro YOSHIGA
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Publication number: 20160027393Abstract: An active matrix liquid crystal display including: a plurality of pixel cells, each of which is formed by a pair of electrodes sandwiching a liquid crystal layer, wherein when the active matrix liquid crystal display is displaying a static image, the pixel cell is refreshed through a first period, a second period, and a third period in sequence, wherein in the first period, the pixel cell is charged by at least a non-target voltage; in the second period, the pixel cell is charged by a target voltage; and in the third period, the pixel cell is not charged until the next first period.Type: ApplicationFiled: July 25, 2014Publication date: January 28, 2016Inventor: Masahiro Yoshiga
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Image processing device using adding module for adding error diffusion value or error diffusion seed
Patent number: 8655065Abstract: An image processing device comprises a halftoning module, a detecting module, an adding module and a generating module. The halftoning module generates an error diffusion value. The detecting module detects an edge at a current pixel of an image. The adding module adds the pixel value of the current pixel with one of the error diffusion value and an error diffusion seed according to the detecting result. The generating module generates the error diffusion seed. The error diffusion seed is generated by a formula based on the pixel value and location of the current pixel and a random number, or the error diffusion seed is generated by a formula based on the pixel value of the current pixel and a looked-up value, and the looked-up value is retrieved from a look-up table according to the location of the current pixel.Type: GrantFiled: October 14, 2010Date of Patent: February 18, 2014Assignee: Chimei Innolux CorporationInventors: Naoki Sumi, Yoshikazu Matsui, Satoshi Kawata, Masahiro Yoshiga -
Patent number: 8564519Abstract: An operating method and a display panel are provided. The method Includes a number steps. A display panel is provided, and has a pixel element, the pixel element including an n-bit memory, n being a positive integer in accordance with image data. The pixel element is driven by using a k-th data voltage, k being smaller than 2n, the k-th data voltage ranging between a plurality of data voltages having absolute values in an increasing order. When k is odd, the k-th data voltage has one of positive and negative polarities. When k is even, the k-th data voltage has the other one of positive and negative polarities.Type: GrantFiled: August 10, 2011Date of Patent: October 22, 2013Assignee: Chimei Innolux CorporationInventors: Keitaro Yamashita, Masahiro Yoshiga, Satoru Takahashi
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Patent number: 8487967Abstract: An active matrix display device is provided and includes a plurality of pixels arranged in a matrix and a backlight source disposed at the backside of the matrix which emits light to the matrix. Each pixel includes a liquid crystal (LC) element, a driving controlling switch, and a storage capacitor. The driving controlling switch controls the driving of the LC element. The storage capacitor stores image data provided to the LC element through the driving controlling switch. The display device further includes a luminance detector and a voltage supplier. The luminance detector detects luminance of the backlight source. According to the detected luminance, the voltage supplier, in a sustain period of the image data, provides a predetermined voltage to a node of the storage capacitor which is opposite to a node of the storage capacitor coupled to the LC element.Type: GrantFiled: August 16, 2010Date of Patent: July 16, 2013Assignee: Chimei Innolux CorporationInventor: Masahiro Yoshiga
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Patent number: 8390655Abstract: An active matrix liquid crystal display device and driving method thereof is provided, in which two different gamma voltage signals can be generated for two pixels of a sub-pixel without extra source lines or gate lines. In a sub-pixel having a first pixel and a second pixel, the switching on/off of the first pixel is controlled by one gate line and that of the second pixel is controlled by one gate line and one source line. The first pixel has a first thin film transistor (TFT) and an electrostatic capacitor. The second pixel has second and third TFTs serially connected. Gate electrodes of the two serially-connected TFTs are connected to the gate line and the source line, respectively.Type: GrantFiled: February 1, 2010Date of Patent: March 5, 2013Assignee: Chimei Innolux CorporationInventor: Masahiro Yoshiga
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Publication number: 20130038595Abstract: An operating method and a display panel are provided. The method Includes a number steps. A display panel is provided, and has a pixel element, the pixel element including an n-bit memory, n being a positive integer in accordance with image data. The pixel element is driven by using a k-th data voltage, k being smaller than 2n, the k-th data voltage ranging between a plurality of data voltages having absolute values in an increasing order. When k is odd, the k-th data voltage has one of positive and negative polarities. When k is even, the k-th data voltage has the other one of positive and negative polarities.Type: ApplicationFiled: August 10, 2011Publication date: February 14, 2013Applicant: CHIMEI INNOLUX CORPORATIONInventors: Keitaro YAMASHITA, Masahiro YOSHIGA, Satoru TAKAHASHI
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Patent number: 8264444Abstract: A display device includes a pixel electrode; a transistor for supplying a driving voltage to the electrode pixel; and a gate-line driver circuit for providing a gate voltage to the transistor and inversely driving a driving voltage supplied to the electrode pixel via the transistor. The gate voltage has different voltage levels in a first driving state that the gate-line driver circuit drives the transistor with a level of the driving voltage and in a second driving state that the gate-line driver circuit drives the transistor with another level of the driving voltage.Type: GrantFiled: March 13, 2009Date of Patent: September 11, 2012Assignee: Chimei Innolux CorporationInventor: Masahiro Yoshiga
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Patent number: 8264440Abstract: Disclosed is a display device having a pixel electrode and a pixel driving transistor. The display device comprises a capacitor, a gate voltage control transistor and a source driving circuit. The capacitor, coupled to the gate of the pixel driving transistor, holds the applied voltage to the aforesaid gate. The gate voltage control transistor has a drain coupled to a connection point between the gate of the pixel driving transistor and the capacitor, a source coupled to the source bus line and a gate coupled to the gate line, for controlling the applied voltage of the capacitor. The source driving circuit utilizes the adjacent source bus lines to alternately switch the voltage held by the capacitor among several different high voltages and several different low voltages to drive the source.Type: GrantFiled: August 11, 2009Date of Patent: September 11, 2012Assignee: Chimei Innolux CorporationInventor: Masahiro Yoshiga
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Patent number: 8194022Abstract: An active matrix display device is provided, in which a plurality of different voltages are applied to a pixel having a plurality of liquid crystal units. The display device is composed of a plurality of pixels arranged in a matrix with rows and columns, and a plurality of gate and source lines corresponding to these pixels. Each of the pixels has at least two liquid crystal units L1˜L3, driving transistors T1˜T3 for controlling current flow from one of the source lines Si and Si+1 to a corresponding liquid crystal unit, a storage transistor connected between control electrodes of the driving transistors T1/T2 and a gate line Gj and operated based on the voltages of the source line Si, and a storage capacitor connected between the control electrodes of the driving transistors T1/T2 and a common line/previous gate line Gj?1 for holding a voltage by the storage transistor.Type: GrantFiled: May 8, 2009Date of Patent: June 5, 2012Assignee: Chimei Innolux CorporationInventor: Masahiro Yoshiga
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Patent number: 8194016Abstract: In an active matrix LCD, different signal voltages are applied to adjacent pixels or sub-pixels. Averaged brightness of the adjacent pixels or sub-pixels displays a typical ? curve while viewing right from the front, and on the other hand, displays a constant ? curve within a specified color level (signal voltage) range while viewing at a skew angle from the front. Accordingly, a true image can be seen from the front while the image becomes visibly unidentified at a skew angle from the front.Type: GrantFiled: September 24, 2008Date of Patent: June 5, 2012Assignee: Chimei Innolux CorporationInventors: Masahiro Yoshiga, Minoru Shibazaki
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Publication number: 20120099069Abstract: A display device comprises a plurality of pixels, arranged in a matrix having columns and rows, and a plurality of signal lines, provided in pixel columns or pixel rows. Each of the plurality of pixels comprises a pixel electrode, a first and a second switching element, turned on and off simultaneously and arranged in serial between the pixel electrode and a signal line correspondingly connected to a pixel column or a pixel row of the pixel, and a resistance element, connected from a position between the first and the second switching element to a predetermined constant voltage. A resistance value of the resistance element is larger than turned-on resistance values of the first and the second switching element and smaller than turned-off resistance values of the first and the second switching element. The predetermined constant voltage equals a center voltage of a signal voltage applied to the signal line.Type: ApplicationFiled: August 24, 2011Publication date: April 26, 2012Applicant: CHIMEI INNOLUX CORPORATIONInventor: Masahiro Yoshiga