Patents by Inventor Michiaki Sakamoto
Michiaki Sakamoto 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: 9361725Abstract: Provided are an image generation apparatus, three-dimensional image display apparatus, image generation method and non-transitory computer readable medium.Type: GrantFiled: April 19, 2013Date of Patent: June 7, 2016Assignee: NLT TECHNOLOGIES, LTD.Inventors: Di Wu, Michiaki Sakamoto
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Patent number: 9307220Abstract: An image display device includes region of interest extraction unit, parallax image generation unit and 3D image display unit. Region of interest extraction unit generates depth image signal by depth image conversion employing depth threshold, depth image signal including information on distance in three-dimensional space between viewpoint and each pixel of two-dimensional image including region of interest desired to be noted by observer, depth image conversion being such that depth value indicating distance between viewpoint and each pixel of two-dimensional image is converted to depth value for 2D display when depth value is equal to or larger than depth threshold. Parallax image generation unit generates both-eye parallax image having parallax in region of interest alone, from two-dimensional image and image obtained by conversion of region of interest image representing region of interest at each of both-eye viewpoints, based on two-dimensional image and depth image signal.Type: GrantFiled: January 26, 2012Date of Patent: April 5, 2016Assignee: NLT TECHNOLOGIES, LTD.Inventors: Di Wu, Michiaki Sakamoto
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Publication number: 20160080718Abstract: An image display device includes region of interest extraction unit, parallax image generation unit and 3D image display unit. Region of interest extraction unit generates depth image signal by depth image conversion employing depth threshold, depth image signal including information on distance in three-dimensional space between viewpoint and each pixel of two-dimensional image including region of interest desired to be noted by observer, depth image conversion being such that depth value indicating distance between viewpoint and each pixel of two-dimensional image is converted to depth value for 2D display when depth value is equal to or larger than depth threshold. Parallax image generation unit generates both-eye parallax image having parallax in region of interest alone, from two-dimensional image and image obtained by conversion of region of interest image representing region of interest at each of both-eye viewpoints, based on two-dimensional image and depth image signal.Type: ApplicationFiled: November 25, 2015Publication date: March 17, 2016Inventors: Di WU, Michiaki SAKAMOTO
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Patent number: 9204133Abstract: Provided is a stereoscopic display device provided with a stereoscopic display panel and a display controller, the stereoscopic display panel including a lenticular lens, a color filter substrate, a TFT substrate, etc. Unit pixels arranged in a horizontal direction parallel to the direction in which both eyes of viewer are arranged are alternately used as left-eye pixels and right-eye pixels. The display controller determined, according to temperature information from a temperature sensor, the contraction/expansion of the lens by a stereoscopic image generating module and generates 3D image data for driving the display panel in which the amount of disparity in a specific disparity direction is corrected on the basis of parameter information defined by an effective linear expansion coefficient inherent in the stereoscopic display panel, or the like and the magnitude of the temperature to thereby ensure a predetermined stereoscopic visual recognition range even when the lens are contracted/expanded.Type: GrantFiled: December 3, 2010Date of Patent: December 1, 2015Assignee: NLT TECHNOLOGIES, LTD.Inventors: Koji Shigemura, Di Wu, Michiaki Sakamoto
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Patent number: 9177511Abstract: An electrophoretic display device is provided, in which an image update period is constituted with a reset period including at least a stirring pulse for stirring electrophoretic particles and a compensation pulse for suppressing accumulation of the residual DC component and with a set period including a set pulse for applying, to intended pixels, a voltage of polarity for making transition to black or white for a prescribed amount of time according to a next image. The voltage waveforms for each display gradation are so designed that a period where a positive voltage is applied to a counter electrode and a period where a negative voltage is applied do not overlap with each other, and a compensation pulse is applied after the stirring pulse which sets all the pixels of the display unit to a white or black base state. Thereby, changes in the display state are not visually recognized.Type: GrantFiled: September 16, 2013Date of Patent: November 3, 2015Assignee: NLT TECHNOLOGIES, LTD.Inventors: Tetsushi Sato, Michiaki Sakamoto
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Patent number: 9093035Abstract: An LCD device has a reflective area that reflects light incident from a polarizing film side using a reflection film, and a transmissive area that transmits light of a backlight incident from a TFT substrate side. The drive voltages of the reflective area and transmissive area are Vr and Vt, the black voltage in the reflective area is Vr (K), the black voltage in the transmissive area is Vt (K). The reflectance R, the transmittance T, characteristics of R with respect to drive voltage [Vr (K)?Vr] and characteristics of T with respect to drive voltage [Vt?Vt (K)] substantially match each other.Type: GrantFiled: May 17, 2013Date of Patent: July 28, 2015Assignee: NLT TECHNOLOGIES, LTD.Inventors: Kenichirou Naka, Michiaki Sakamoto, Kenichi Mori, Hiroshi Nagai
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Patent number: 9070339Abstract: In a liquid crystal panel, a reflective pixel electrode and a transmissive pixel electrode in a unit pixel are supplied with an image signal output from a data line drive circuit, the two mutually different scanning signals output from a scanning line drive circuit, and common signals output from a common line drive circuit. The phase of the image signal is set different from that of the common signal. Further, a period during which the two scanning signals are selected is set in one horizontal period, the ending of the selection period for one of the scanning signals is set to a point in time before an electrical potential of the common signal changes, and the ending of the selection period for the other scanning signal is set to a point in time after the electrical potential of the common signal changes.Type: GrantFiled: May 12, 2014Date of Patent: June 30, 2015Assignee: NLT Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto
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Patent number: 9013516Abstract: An image display device expresses multiple colors including intermediate colors and an electrophoretic particle making up the image display device includes n-kinds of (n>2) charged particles each having colors and threshold value voltages each being different from one another. A specified period during which a voltage is applied includes a resetting period for applying a resetting voltage, a first, . . . , kth, . . . , nth voltage applying periods and a voltage to be applied includes a resetting voltage, 0V, first voltage (absolute value) to be applied within the first voltage applying period, 0V, kth voltage (absolute value) to be applied within kth voltage applying period, and 0V voltage, nth voltage (absolute value) to be applied within an nth voltage applying period. Relationships: |first applied voltage|>|kth applied voltage|>|nth voltage| and |first applied voltage|<|kth voltage|<|nth voltage| are satisfied.Type: GrantFiled: February 8, 2012Date of Patent: April 21, 2015Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Koji Shigemura, Setsuo Kaneko, Tetsushi Sato, Kenichi Takatori
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Patent number: 8988637Abstract: To suppress light leakage at the time of dark state, and to provide a liquid crystal display device whose electrodes in the reflection areas can be formed with high precision. The liquid crystal display device has a reflection area within a pixel unit by corresponding at least to a reflection plate forming part, and the reflection area is driven with a lateral electric field mode and normally-white. A driving electrode for forming an electric field to a liquid crystal layer of the reflection area is formed on the reflection plate via an insulating film by using a non-transparent electric conductor.Type: GrantFiled: June 17, 2013Date of Patent: March 24, 2015Assignee: NLT Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto, Ken Sumiyoshi, Hiroshi Nagai, Kenichirou Naka, Masayuki Jumonji, Hiroshi Tanabe
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Patent number: 8963903Abstract: An image display device is provided which suppresses discomfort “flickering” in a process of renewing a screen to realize multiple gray level displaying including an intermediate color. Electrophoretic particles are made up of n-kinds of charged particles C1, . . . , Ck, . . . , Cn having colors different from one another and threshold voltages to initiate an electrophoresis. Each of charged particles C1, . . . , Ck, . . . , Cn satisfies a relationship characteristic of threshold value voltage of charged particles> . . . >threshold value voltage of charged particle Ck> . . . >threshold value voltage of charged particle Cn. A voltage applying unit, at time of renewing a screen, renews a screen to a next screen having a desired density by a transition of a relative color density of each charged particle to a relative color density of a corresponding intermediate state in order of charged particle C1> . . . >Ck, . . . , Cn for a voltage driving waveform of each charged particle.Type: GrantFiled: April 9, 2012Date of Patent: February 24, 2015Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Koji Shigemura, Setsuo Kaneko
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Patent number: 8943349Abstract: To provide a browsing terminal and the like with high security, which can effectively prevent contents data stored in a terminal from being stolen unlawfully by a third party even if the terminal is accidentally lost. The browsing terminal includes: a receiving part for receiving contents data; a volatile memory for storing the received contents data; a display device with a memory function, which displays the contents data stored in the volatile memory; and a secondary battery for supplying power to the volatile memory and the display device.Type: GrantFiled: April 26, 2013Date of Patent: January 27, 2015Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Kenichi Takatori
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Patent number: 8913219Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region. The reflective region operates in a normally-white mode, and the transmissive region operates in a normally-black mode. A first potential is applied to a liquid crystal layer in the reflective region, and a second potential is applied to the liquid crystal layer in the transmissive region. The first and second potential have therebetween an opposite magnitude relationship in each of the pixels.Type: GrantFiled: March 15, 2013Date of Patent: December 16, 2014Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
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Publication number: 20140354615Abstract: An image display device having improved image retention capability by analyzing the mechanism behind the creation of an unwanted electric field applied to an element after a power supply is turned off, and devising a drive method and so forth for compensating for the same, is provided. Electrophoretic particles contain three types of charged particles, C (cyan), M (magenta), and Y (yellow) that are mutually different in color and threshold voltage for starting electrophoresis. When the threshold voltages of C (cyan), M (magenta) and Y (yellow) are respectively Vth3, Vth2, and Vth3, these satisfy the relationship |Vth3|<|Vth2|<|Vth1|. Further, a voltage application unit applies a voltage (VE) different from a reference potential during the final period of image update period. The voltage (VE) is a compensation voltage that suppresses the movement of charged particles.Type: ApplicationFiled: January 30, 2012Publication date: December 4, 2014Inventors: Michiaki Sakamoto, Koji Shigemura
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Patent number: 8884868Abstract: A display panel which can be applied to a display device comprises a first substrate, a second substrate and a display element layer. The first substrate has a structure in which a device layer is stacked on an insulating substrate via a first conductive layer. A device layer has at least, a pixel electrode and a wiring that are connected to a pixel switch. The second substrate includes a second conductive layer that is provided so as to face the pixel electrode arranged on the above first substrate. A display element layer is interposed between the above first substrate and the above second substrate.Type: GrantFiled: August 13, 2009Date of Patent: November 11, 2014Assignee: NLT Technologies, Ltd.Inventor: Michiaki Sakamoto
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Patent number: 8885126Abstract: A transflective LCD unit includes a liquid crystal (LC) layer: first and second substrates sandwiching therebetween the LC layer to define an array of pixels each including a reflective area and a transmissive area; an electrode assembly for driving the LC layer such that the LC layer in the reflective area is driven in a longitudinal-electric-field mode and the LC layer in the transmissive area is driven in a lateral-electric-field mode; and a reverse-tilt control member for controlling a reverse tilt area in which a reverse tilt of LC molecules occurs near the boundary between the reflective area and the transmissive area.Type: GrantFiled: July 31, 2013Date of Patent: November 11, 2014Assignee: NLT Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto, Hiroshi Nagai
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Publication number: 20140247203Abstract: In a liquid crystal panel, a reflective pixel electrode and a transmissive pixel electrode in a unit pixel are supplied with an image signal output from a data line drive circuit, the two mutually different scanning signals output from a scanning line drive circuit, and common signals output from a common line drive circuit. The phase of the image signal is set different from that of the common signal. Further, a period during which the two scanning signals are selected is set in one horizontal period, the ending of the selection period for one of the scanning signals is set to a point in time before an electrical potential of the common signal changes, and the ending of the selection period for the other scanning signal is set to a point in time after the electrical potential of the common signal changes.Type: ApplicationFiled: May 12, 2014Publication date: September 4, 2014Applicant: NLT TECHNOLOGIES, LTD.Inventors: Kenichi MORI, Michiaki SAKAMOTO
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Patent number: 8773623Abstract: An IPS-mode transflective LCD device includes an array of pixels each including a reflective region and a transmissive region. A first pixel electrode and a first common electrode are formed in the reflective region, and a second pixel electrode and a second common electrode are formed in the transmissive region. The first and second pixel electrodes receive a common pixel signal. The first common electrode receives a first common signal which is common among the reflective regions of a plurality of pixels, and the second common electrode receives a second common signal which is common among the transmissive regions of the plurality of pixels.Type: GrantFiled: March 15, 2013Date of Patent: July 8, 2014Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Jin Matsushima, Hiroshi Nagai, Kenichi Mori, Hidenori Ikeno, Yasuki Kudo, Ken Sumiyoshi
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Patent number: 8760377Abstract: In a liquid crystal panel, a reflective pixel electrode and a transmissive pixel electrode in a unit pixel are supplied with an image signal output from a data line drive circuit, the two mutually different scanning signals output from a scanning line drive circuit, and common signals output from a common line drive circuit. The phase of the image signal is set different from that of the common signal. Further, a period during which the two scanning signals are selected is set in one horizontal period, the ending of the selection period for one of the scanning signals is set to a point in time before an electrical potential of the common signal changes, and the ending of the selection period for the other scanning signal is set to a point in time after the electrical potential of the common signal changes.Type: GrantFiled: June 30, 2010Date of Patent: June 24, 2014Assignee: NLT Technologies, Ltd.Inventors: Kenichi Mori, Michiaki Sakamoto
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Patent number: 8755011Abstract: A liquid crystal display device includes a first substrate, a second substrate, and a liquid crystal layer sandwiched between the first and second substrates. The first substrate includes first to N-th 1st retardation plates arranged on the first transparent substrate, and the second substrate includes first to N-th 2nd retardation plates arranged on the second transparent substrate. Assuming that a retardation plate among the first to N-th 1st retardation plates has an optical axis arranged at a first angle relative to a reference direction and a retardation plate among the first to N-th 2nd retardation plates, corresponding to the retardation plate among the first to N-th 1st retardation plates, has an optical axis arranged at a second angle relative to the reference direction, the first and second angles are different from each other by about 90 degrees.Type: GrantFiled: February 3, 2011Date of Patent: June 17, 2014Assignee: NLT Technologies, Ltd.Inventors: Hidenori Ikeno, Michiaki Sakamoto, Takahiko Watanabe, Teruaki Suzuki
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Patent number: 8736545Abstract: In an image display device including: an electrophoretic display element having a memory property and a display/update controlling unit which outputs the first control signal and the data signal to the data line driving circuit, and the second control signal to the scanning line driving circuit, based on given image data, during the image updating period of time, and cuts off power supply to the data line driving circuit and the scanning line driving circuit, during an image holding period of time, the display/update controlling unit, during the image updating period of time, inputs sequentially a plurality of pieces of compressed image block data having a data configuration which one screen of the image data is divided into a plurality of blocks, and compressed for each block, expands the compressed image block data of a preceding screen and the compressed image block data of a corresponding updating screen sequentially inputted, and outputs the data signal for screen update to the data line driving circuit,Type: GrantFiled: July 16, 2010Date of Patent: May 27, 2014Assignee: NLT Technologies, Ltd.Inventors: Michiaki Sakamoto, Kenichi Takatori