Patents by Inventor Akira Sakaigawa
Akira Sakaigawa 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: 20170287983Abstract: A display device includes a display unit in which pixels are arranged in a matrix. The pixels each include a first sub-pixel having the largest area among sub-pixels, a second sub-pixel adjacent to the first sub-pixel and having an area smaller than that of the first sub-pixel, and a third sub-pixel adjacent to the first and second sub-pixels, having an area smaller than that of the first sub-pixel, and arranged in the same column as that of second sub-pixels. First, second, and third pixels are aligned in at least one of a column direction or a row direction and each include the first, second, and third sub-pixels that can display different one of first, second, and third colors. Areas of the first, second, and third colors displayable by the first, second, and third pixels in total are equal to one another.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Applicant: Japan Display Inc.Inventors: Masaaki KABE, Hidemasa YAMAGUCHI, Kojiro IKEDA, Akira SAKAIGAWA
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Patent number: 9773470Abstract: A display device includes: an image display panel including a plurality of pixels each including first to fourth sub-pixels; and a signal processing unit. The signal processing unit determines an expansion coefficient related to the image display panel, obtains output signals of the first to the third sub-pixels based on at least input signals of the first to the third sub-pixels and the expansion coefficient to be output to the first to the third sub-pixels respectively, obtains a fourth sub-pixel correction value as a correction value of an output signal of the fourth sub-pixel based on the input signals of the first to the third sub-pixels and the expansion coefficient, and obtains the output signal of the fourth sub-pixel based on the input signals of the first to third sub-pixels, the expansion coefficient, and the fourth sub-pixel correction value to be output to the fourth sub-pixel.Type: GrantFiled: April 14, 2015Date of Patent: September 26, 2017Assignee: Japan Display Inc.Inventors: Tae Kurokawa, Akira Sakaigawa, Masaaki Kabe, Kojiro Ikeda, Fumitaka Gotoh, Amane Higashi, Toshiyuki Nagatsuma
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Publication number: 20170272702Abstract: The display system includes a display system including an image-capturing apparatus including an image-capturing element; an image processing apparatus that performs image processing on the image; and a display apparatus including a display device that displays the image resulting from the image processing. The image processing apparatus includes an image processor that performs the image processing on a predetermined number of line images corresponding to a part of a frame image captured by the image-capturing element, sequentially outputs the image to the display apparatus per the predetermined number of line images, and causes the display apparatus to display the frame image; and a storage device that stores the predetermined number of line images until the frame image is completed. The image processor is configured to perform the image processing including frame unit processing on the predetermined number of line images associated with the frame image to be output.Type: ApplicationFiled: June 5, 2017Publication date: September 21, 2017Inventors: Yutaka OZAWA, Akira SAKAIGAWA, Keiji FUKUHARA
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Patent number: 9746594Abstract: An image display apparatus including an image display panel that includes: a first color filter for passing light of a first primary and first auxiliary pixels for displaying the first primary; a second color filter for passing light of a second primary and second auxiliary pixels for displaying the second primary; a third color filter for passing light of a third primary and third auxiliary pixels for displaying the third primary; and fourth auxiliary pixels for displaying a fourth color; the first auxiliary pixels, the second auxiliary pixels, the third auxiliary pixels, and the fourth auxiliary pixels being arranged in a two-dimensional matrix, and a light shielding region disposed at least partly around the peripheral edge of each of the fourth auxiliary pixels.Type: GrantFiled: July 28, 2016Date of Patent: August 29, 2017Assignee: JAPAN DISPLAY INC.Inventors: Yasuyuki Matsui, Masaaki Kabe, Akira Sakaigawa, Koji Noguchi, Kenta Seki
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Patent number: 9741293Abstract: A display device is disclosed. According to one embodiment, the display device includes a light source, a dimming panel and a display panel. The dimming panel includes a dimming area with sub-areas arrayed in a matrix. The dimming panel also controls a transmittance of light from the light source in each of the sub-areas. The display panel includes a display area with pixels arrayed in a matrix and displays an image due to incident light transmitted through the dimming panel thereon. In one example, an optical separation system is arranged between the dimming panel and the display panel. It separates light from the light source into respective wavelength bands. The display panel includes corresponding liquid crystal panels on which the respective wavelength bands are made incident.Type: GrantFiled: August 7, 2015Date of Patent: August 22, 2017Assignee: Japan Display Inc.Inventors: Tsutomu Harada, Akira Sakaigawa
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Patent number: 9734766Abstract: A lighting device includes a light source and a control section. The control section has a first mode and a second mode as luminance setting modes of the light source and sets, in order to exercise variable control of a reach time taken to change luminance of the light source to a determined value, the reach time on the basis of the first mode for a determined period at the time of switching from the first mode to the second mode.Type: GrantFiled: July 21, 2015Date of Patent: August 15, 2017Assignee: Japan Display Inc.Inventors: Akira Sakaigawa, Toshiyuki Nagatsuma
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Patent number: 9728161Abstract: A display device includes a signal processing unit that receives input signals, and calculates output signals to a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The signal processing unit calculates a frequency of pixels belonging to each of a plurality of partitions using a light quantity of a surface light source. The signal processing unit calculates an index value for each of the partitions by at least multiplying the cumulative frequency being obtained by sequentially adding the frequency of pixels from a partition having the maximum light quantity among the partitions, and the number of partitions representing a position of a partition to which the cumulative frequency belongs counted from the partition having the maximum light quantity. The signal processing unit controls luminance of the surface light source based on a partition in which the index value exceeds a threshold.Type: GrantFiled: April 22, 2015Date of Patent: August 8, 2017Assignee: Japan Display Inc.Inventors: Kojiro Ikeda, Toshiyuki Nagatsuma, Masaaki Kabe, Amane Higashi, Tae Kurokawa, Fumitaka Gotoh, Akira Sakaigawa
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Publication number: 20170221433Abstract: In a display device, pixels each including first to fourth subpixels that respectively display first to third primary colors and fourth color are arranged on an image display panel. A lighting unit emits light to the panel from the rear thereof. A control unit calculates a required luminance value for each block of the display surface of the panel based on an input image signal, determines a light source lighting amount of the lighting unit based on luminance distribution information on the lighting unit so as to satisfy the required luminance value, generates luminance information on each pixel based on the luminance distribution information and light source lighting amount, generates an output image signal that drives the subpixels based on the luminance information and input image signal, controls the lighting unit by the light source lighting amount, and controls the panel by the output image signal.Type: ApplicationFiled: April 20, 2017Publication date: August 3, 2017Inventors: Tsutomu Harada, Naoyuki Takasaki, Akira Sakaigawa
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Patent number: 9721996Abstract: A display device includes a display unit in which pixels are arranged in a matrix. The pixels each include a first sub-pixel having the largest area among sub-pixels, a second sub-pixel adjacent to the first sub-pixel and having an area smaller than that of the first sub-pixel, and a third sub-pixel adjacent to the first and second sub-pixels, having an area smaller than that of the first sub-pixel, and arranged in the same column as that of second sub-pixels. First, second, and third pixels are aligned in at least one of a column direction or a row direction and each include the first, second, and third sub-pixels that can display different one of first, second, and third colors. Areas of the first, second, and third colors displayable by the first, second, and third pixels in total are equal to one another.Type: GrantFiled: November 25, 2015Date of Patent: August 1, 2017Assignee: Japan Display Inc.Inventors: Masaaki Kabe, Hidemasa Yamaguchi, Kojiro Ikeda, Akira Sakaigawa
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Publication number: 20170193932Abstract: A driving method for an image display apparatus which includes an image display panel having a plurality of pixels arrayed in a two-dimensional matrix and each configured from a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color, and a signal processing section. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, a third subpixel output signal, and a fourth subpixel output signal. The driving method includes a step of calculating a maximum value (Vmax(S)) of brightness, a saturation (S) and brightness (V(S)), and determining the expansion coefficient (?0).Type: ApplicationFiled: March 2, 2017Publication date: July 6, 2017Inventors: Masaaki Kabe, Amane Higashi, Yasuo Takahashi, Akira Sakaigawa
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Patent number: 9691827Abstract: According to an aspect, a display device includes a display unit in which a plurality of pixels are arranged in a matrix along two directions intersecting with each other. Each of the pixels includes three sub-pixels corresponding to three of four colors including a first color, a second color, a third color, and a fourth color. An area of one sub-pixel among the three sub-pixels is larger than the area of each of the other two sub-pixels. A sub-pixel of the fourth color is one of the other two sub-pixels. Pixels each including the sub-pixel of the fourth color are not adjacent to each other in at least one of the two directions in the display unit.Type: GrantFiled: November 24, 2015Date of Patent: June 27, 2017Assignee: Japan Display Inc.Inventors: Masaaki Kabe, Kojiro Ikeda, Tsutomu Harada, Akira Sakaigawa
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Patent number: 9679535Abstract: A display device includes a conversion section which generate a data conversion signal including a first number of bits from an input signal, an error dispersion section which generates a display control signal including a second number of bits that is smaller than the first number of bits from the data conversion signal and which spatially disperses errors that occur at the time of generating the display control signal, and a display panel section which displays an image on the basis of the display control signal.Type: GrantFiled: April 13, 2015Date of Patent: June 13, 2017Assignee: Japan Display Inc.Inventors: Akira Sakaigawa, Toshiyuki Nagatsuma, Amane Higashi, Masaaki Kabe
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Publication number: 20170160571Abstract: According to one embodiment, a liquid crystal device includes a first substrate including a first electrode and a second electrode opposed to the first electrode, a second substrate opposed to the first substrate, and a liquid crystal layer including liquid crystal molecules held between the first substrate and the second substrate, wherein the second electrode is positioned closer to the liquid crystal layer than is the first electrode and has a polygonal-shaped first opening including at least one projection, and the liquid crystal layer indicates transparency when no voltage is applied thereto and indicates scattering when a voltage is applied thereto.Type: ApplicationFiled: November 30, 2016Publication date: June 8, 2017Applicant: Japan Display Inc.Inventors: Kojiro IKEDA, Masaaki KABE, Shinichiro OKA, Akira SAKAIGAWA
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Patent number: 9666114Abstract: Disclosed herein is a driving method for an image display apparatus which includes an image display panel and a signal processing section. Each of the pixels includes a first subpixel for displaying a first primary color, a second subpixel for displaying a second primary color, a third subpixel for displaying a third primary color and a fourth subpixel for displaying a fourth color. The signal processing section is capable of calculating a first subpixel output signal, a second subpixel output signal, and a third subpixel output signal. The driving method includes the step, further carried out by the signal processing section, of calculating a fourth subpixel output signal based on a fourth subpixel control second signal and a fourth subpixel control first signal, and outputting the calculated fourth subpixel output signal to the fourth subpixel of the (p,q)th pixel.Type: GrantFiled: July 2, 2014Date of Patent: May 30, 2017Assignee: JAPAN DISPLAY INC.Inventors: Amane Higashi, Akira Sakaigawa, Masaaki Kabe, Yasuo Takahashi
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Patent number: 9659531Abstract: In a display device, pixels each including first to fourth subpixels that respectively display first to third primary colors and fourth color are arranged on an image display panel. A lighting unit emits light to the panel from the rear thereof. A control unit calculates a required luminance value for each block of the display surface of the panel based on an input image signal, determines a light source lighting amount of the lighting unit based on luminance distribution information on the lighting unit so as to satisfy the required luminance value, generates luminance information on each pixel based on the luminance distribution information and light source lighting amount, generates an output image signal that drives the subpixels based on the luminance information and input image signal, controls the lighting unit by the light source lighting amount, and controls the panel by the output image signal.Type: GrantFiled: March 25, 2015Date of Patent: May 23, 2017Assignee: Japan Display Inc.Inventors: Tsutomu Harada, Naoyuki Takasaki, Akira Sakaigawa, Amane Higashi
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Publication number: 20170108747Abstract: In a display device, first and second sub pixels arranged in juxtaposition between adjacent scan lines are lined alternately in a column direction in at least one of first and third columns of sub pixels; at least one of third and fourth sub pixels is arranged between adjacent scan lines in at least one of second and fourth columns of sub pixels; the first, second, third, and fourth sub pixels are included in an identical row of pixels and the first, second, third, and fourth columns of sub pixels; and a first pixel that is in an identical row of pixels and includes sub pixels of the first and second columns includes a sub pixel not present in a second pixel that is adjacent to the first pixel in a row direction and is included in the third and fourth columns.Type: ApplicationFiled: December 29, 2016Publication date: April 20, 2017Inventor: Akira Sakaigawa
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Publication number: 20170110072Abstract: Disclosed herein is a display apparatus including: a first pixel including three sub-pixels for displaying three primary colors respectively; and a second pixel including three sub-pixels for displaying two colors selected among the three primary colors and a predetermined color other than the three primary colors, wherein, in the first pixel, the size of the display surface of a sub-pixel for displaying a specific color included in the three primary colors as a specific color missing from the second pixel is larger than each of the sizes of the display surfaces of the two other sub-pixels for displaying the two other primary colors respectively.Type: ApplicationFiled: December 30, 2016Publication date: April 20, 2017Inventors: Yasuyuki Matsui, Akira Sakaigawa, Masaaki Kabe, Kenta Seki
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Publication number: 20170097458Abstract: According to one embodiment, a light source device includes a light source element including a first light emitting element which emits light of a first wavelength and a second light emitting element which emits light of a second wavelength, a first wavelength conversion material which is excited by the light from the first light emitting element to emit light of a third wavelength, and a second wavelength conversion material which is excited by the light from the second light emitting element to emit light of a fourth wavelength, wherein cyan light produced by the light emission of the first light emitting element and magenta light produced by the light emission of the second light emitting element are emitted from the same light emitting surface.Type: ApplicationFiled: October 3, 2016Publication date: April 6, 2017Applicant: Japan Display Inc.Inventors: Susumu KIMURA, Tsutomu HARADA, Akira SAKAIGAWA
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Publication number: 20170047026Abstract: According to one embodiment, a display device includes signal lines, scanning lines, a first pixel, a second pixel and a third pixel. The first pixel including a first subpixel which displays a first color, a second subpixel which displays white, and a third subpixel which displays a second color. The second pixel including a fourth subpixel which displays a third color, a fifth subpixel which displays white, and a sixth subpixel which displays the first color. The third pixel including a seventh subpixel which displays the second color, an eighth subpixel which displays white, and a ninth subpixel which displays the third color.Type: ApplicationFiled: July 28, 2016Publication date: February 16, 2017Applicant: Japan Display Inc.Inventors: Takeyuki TSURUMA, Akira SAKAIGAWA, Masaaki KABE, Kojiro IKEDA
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Patent number: 9569988Abstract: Disclosed herein is a display apparatus including: a first pixel including three sub-pixels for displaying three primary colors respectively; and a second pixel including three sub-pixels for displaying two colors selected among the three primary colors and a predetermined color other than the three primary colors, wherein, in the first pixel, the size of the display surface of a sub-pixel for displaying a specific color included in the three primary colors as a specific color missing from the second pixel is larger than each of the sizes of the display surfaces of the two other sub-pixels for displaying the two other primary colors respectively.Type: GrantFiled: March 23, 2016Date of Patent: February 14, 2017Assignee: Japan Display Inc.Inventors: Yasuyuki Matsui, Akira Sakaigawa, Masaaki Kabe, Kenta Seki