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).

  • Patent number: 9558700
    Abstract: 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: Grant
    Filed: May 13, 2015
    Date of Patent: January 31, 2017
    Assignee: Japan Display Inc.
    Inventor: Akira Sakaigawa
  • Patent number: 9523802
    Abstract: According to one embodiment, a first substrate includes first to fourth pixel electrodes. A color filter layer includes a red filter opposed to the first pixel electrode, a green filter opposed to the second pixel electrode, a first blue filter opposed to the third pixel electrode and having a peak of transmittance at a wavelength shorter than 460 nm, and a second blue filter opposed to the fourth pixel electrode and having a peak of transmittance at a wavelength longer than 460 nm.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: December 20, 2016
    Assignee: Japan Display Inc.
    Inventors: Akira Sakaigawa, Yoneharu Takubo
  • Patent number: 9501983
    Abstract: According to an aspect, a color conversion device includes a signal processing unit and a signal output unit. When a color specified in a predetermined color space by color data based on input signals is a color outside a defined color gamut defined in the color space, the signal processing unit generates in-defined-gamut data, and when the color specified in the color space by the color data based on the input signals is a color on a border of or inside the defined color gamut, the signal processing unit does not convert the color data based on the input signals into color data of a color different from that specified by the color data based on the input signals, and generates in-defined-gamut data identical to the color data based on the input signals, and. The signal processing unit generates output signals based on the in-defined-gamut data.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: November 22, 2016
    Assignee: Japan Display Inc.
    Inventors: Hirokazu Tatsuno, Toshiyuki Nagatsuma, Akira Sakaigawa, Masaaki Kabe
  • Publication number: 20160334554
    Abstract: 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: Application
    Filed: July 28, 2016
    Publication date: November 17, 2016
    Inventors: Yasuyuki Matsui, Masaaki Kabe, Akira Sakaigawa, Koji Noguchi, Kenta Seki
  • Publication number: 20160307487
    Abstract: A display device 10 includes are arranged in a matrix form and to which image information is input, and a signal processing unit 20. The signal processing unit 20 includes a rendering position deciding unit that decides whether or not a sub-pixel rendering process of changing input signal values of sub-pixels of a second pixel among a first pixel, the second pixel, and the third pixel is performed, a pattern information acquiring unit that acquires an arrangement of the sub-pixels in a processing direction of either of a portrait mode and a landscape mode as pattern information indicating a first arrangement pattern or a second arrangement pattern, and a rendering unit that performs a first sub-pixel rendering process or a second sub-pixel rendering process on the input signals of the sub-pixels of the second pixel based on the decision of the rendering position deciding unit and the pattern information.
    Type: Application
    Filed: March 30, 2016
    Publication date: October 20, 2016
    Applicant: Japan Display Inc.
    Inventors: Kojiro IKEDA, Masaaki KABE, Akira SAKAIGAWA
  • Patent number: 9460675
    Abstract: According to an aspect, a display device includes: an image display panel; and a plurality of signal processing circuits that are responsible for respective regions in the image display panel, that convert an input value of an input HSV color space of an input signal to each of their own responsible regions into an extension value of an extended HSV color space to generate an output signal of the extension value for the image display panel. The signal processing circuits decide an extension coefficient ?A for the image display panel in its entirety in a cooperative manner. The signal processing circuit, regarding its own responsible region, calculates an output signal of each of a first sub-pixel, a second sub-pixel, third sub-pixel, and a fourth sub-pixel.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: October 4, 2016
    Assignee: Japan Display Inc.
    Inventors: Tsutomu Harada, Akira Sakaigawa, Naoyuki Takasaki, Fumitaka Goto
  • Publication number: 20160259219
    Abstract: According to one embodiment, a display device includes a first color film of a first color and a second color film of a second color, wherein the irradiator comprises a first light source of a third color and a second light source of a fourth color, the first color and the second color have a complementary color relationship, lightness of the first color is greater than lightness of the second color, a first total displayable area of the first color film is larger than a second total displayable area of the second color film, and the irradiator is configured to radiate light of the first light source and the second light source in a switching manner by time division.
    Type: Application
    Filed: February 18, 2016
    Publication date: September 8, 2016
    Applicant: Japan Display Inc.
    Inventors: Shinichiro OKA, Youichi ASAKAWA, Akira SAKAIGAWA, Tsutomu HARADA
  • Publication number: 20160260401
    Abstract: According to an aspect, a display device comprising a display unit that produces a display output corresponding to an input signal. The display unit combines the display output corresponding to each of four or more colors. The display unit includes a plurality of pixels each including three or more sub-pixels, the number of which is smaller than the number of colors. The pixel includes, as the sub-pixels, one first sub-pixel having largest display region among the sub-pixels and two or more second sub-pixels each having a display region smaller than that of the first sub-pixel. One of the second sub-pixels outputs a high luminance color having highest luminance among the four or more colors.
    Type: Application
    Filed: February 29, 2016
    Publication date: September 8, 2016
    Inventor: Akira Sakaigawa
  • Patent number: 9429689
    Abstract: 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: Grant
    Filed: September 15, 2015
    Date of Patent: August 30, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Yasuyuki Matsui, Masaaki Kabe, Akira Sakaigawa, Koji Noguchi, Kenta Seki
  • Publication number: 20160203778
    Abstract: 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: Application
    Filed: March 23, 2016
    Publication date: July 14, 2016
    Inventors: Yasuyuki Matsui, Akira Sakaigawa, Masaaki Kabe, Kenta Seki
  • Patent number: 9378691
    Abstract: A display device includes: an image display unit that includes a plurality of main pixels in an image display region, the image display unit including sub-pixels; a light source that irradiates the image display region; a light source control unit that controls luminance of the light source; and a color information correction processing unit that corrects first color information that is obtained based on the luminance of the light source and an input video signal to second color information, when color information of at least one of a red pixel, a green pixel, and a blue pixel included in the first color information exceeds a predetermined threshold, the second information is corrected by degenerating color information of the red pixel, the green pixel, and the blue pixel, and by adding color information of the white pixel included in the first color information based on the degenerated color information.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 28, 2016
    Assignee: Japan Display Inc.
    Inventors: Fumitaka Gotoh, Tsutomu Harada, Masaaki Kabe, Tae Kurokawa, Kojiro Ikeda, Toshiyuki Nagatsuma, Akira Sakaigawa, Naoyuki Takasaki, Amane Higashi
  • Publication number: 20160163273
    Abstract: According to one embodiment, the power consumption can be reduced as a whole without a large decrease in the efficiency of transmittance. According to one embodiment, a display device includes subpixels arranged in a first direction and a second direction Y intersecting the first direction, color filters corresponding to the subpixels, respectively, and a light device. The color filters include at least blue filters and yellow filters adjacent to each other. A frame period of the light device includes at least a period of outputting cyan light and a period of outputting magenta light.
    Type: Application
    Filed: December 4, 2015
    Publication date: June 9, 2016
    Applicant: Japan Display Inc.
    Inventors: Akira SAKAIGAWA, Yoichi ASAKAWA, Shinichiro OKA
  • Publication number: 20160163271
    Abstract: A display device includes a light modulation layer having predetermined refractive index anisotropy and including plural light modulation areas which differ in responsiveness to an electric field generated by electrodes, a polarization layer which is disposed on the front side of the light modulation layer, on which side external light enters, which shuts out light other than light having a predetermined polarization direction, a reflection layer disposed on the back side of the light modulation layer, and a phase retardation layer which is disposed between the polarization and light modulation layers, which creates a predetermined phase difference between incident light entering through the polarization layer and reflected light from the reflection layer, and which polarizes the reflected light in a direction different from the predetermined polarization direction. The light modulation layer transmits the reflected light when no electric field is generated and scatters it otherwise.
    Type: Application
    Filed: October 23, 2015
    Publication date: June 9, 2016
    Inventors: Akira SAKAIGAWA, Kentaro OKUYAMA
  • Publication number: 20160155776
    Abstract: 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: Application
    Filed: November 24, 2015
    Publication date: June 2, 2016
    Applicant: Japan Display Inc.
    Inventors: Masaaki KABE, Kojiro IKEDA, Tsutomu HARADA, Akira SAKAIGAWA
  • Publication number: 20160155371
    Abstract: A display device includes a display unit in which a plurality of pixels are arranged. One pixel includes four sub-pixels, and the display unit includes: a pixel including one each of four sub-pixels of four different colors that are a first color, a second color, a third color, and a fourth color; and a pixel including four sub-pixels, where two of the four sub-pixels are identical and are one of sub-pixels of the first color, the second color, and the third color, and remaining two of the four sub-pixels are different two of the sub-pixels of the first color, the second color, and the third color but are not one of the identical sub-pixels.
    Type: Application
    Filed: November 5, 2015
    Publication date: June 2, 2016
    Applicant: Japan Display Inc.
    Inventors: Kojiro IKEDA, Masaaki KABE, Akira SAKAIGAWA
  • Publication number: 20160155777
    Abstract: 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: Application
    Filed: November 25, 2015
    Publication date: June 2, 2016
    Applicant: Japan Display Inc.
    Inventors: Masaaki KABE, Hidemasa YAMAGUCHI, Kojiro IKEDA, Akira SAKAIGAWA
  • Publication number: 20160116768
    Abstract: A display device includes a light modulation layer and a light source. The light modulation layer is disposed between a pair of transparent substrates, has determined refractive index anisotropy, and includes plural light modulation elements which differ in responsiveness to an electric field generated by electrodes formed on a transparent substrate. The light source emits light of a determined color incident on the light modulation layer from a side of the light modulation layer. When the electric field is not generated, the light modulation layer transmits the incident light emitted from the light source. When the electric field is generated, the light modulation layer scatters the incident light and emits scattered light to a transparent substrate.
    Type: Application
    Filed: October 15, 2015
    Publication date: April 28, 2016
    Inventors: Kentaro OKUYAMA, Akira SAKAIGAWA
  • Patent number: 9324283
    Abstract: According to an aspect, a display device includes a first sub-pixel, a second sub-pixel, a third sub-pixel; and a fourth sub-pixel. A signal obtained based on at least an input signal for the first sub-pixel and an extension coefficient is supplied to the first sub-pixel. A signal obtained based on at least an input signal for the second sub-pixel and the extension coefficient is supplied to the second sub-pixel. A signal obtained based on at least an input signal for the third sub-pixel and the extension coefficient is supplied to the third sub-pixel. A signal obtained based on at least the input signal for the first sub-pixel, the input signal for the second sub-pixel, the input signal for the third sub-pixel, and the extension coefficient is supplied to the fourth sub-pixel. The extension coefficient varies based on at least a saturation of the input signals.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: April 26, 2016
    Assignee: Japan Display Inc.
    Inventors: Masaaki Kabe, Toshiyuki Nagatsuma, Amane Higashi, Kojiro Ikeda, Tae Kurokawa, Masashi Mitsui, Hiroki Uchiyama, Hirokazu Tatsuno, Fumitaka Goto, Akira Sakaigawa
  • Patent number: 9318033
    Abstract: 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: Grant
    Filed: November 19, 2012
    Date of Patent: April 19, 2016
    Assignee: Japan Display Inc.
    Inventors: Yasuyuki Matsui, Akira Sakaigawa, Masaaki Kabe, Kenta Seki
  • Patent number: 9311886
    Abstract: According to an aspect, a display device includes an image display panel on which pixels each including sub-pixels for displaying a first color, a second color, a third color, and a fourth color are arranged, and a signal processing unit that converts an input value of an input signal for an input HSV color space into an output signal for an extended HSV color space. The signal processing unit divides the extended HSV color space into a plurality of spaces, sets limit proportion values different from each other with respect to at least two spaces of the divided spaces respectively, calculates an extension coefficient ? with respect to the input signal by using the input signal and a limit proportion value set with respect to a space according to the input signal, and calculates the output signal based on at least the input signal and the extension coefficient ?.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: April 12, 2016
    Assignee: Japan Display Inc.
    Inventors: Kojiro Ikeda, Fumitaka Goto, Tae Nakahara, Masashi Mitsui, Amane Higashi, Hiroki Uchiyama, Toshiyuki Nagatsuma, Hirokazu Tatsuno, Masaaki Kabe, Akira Sakaigawa