Patents by Inventor Susumu Kimura
Susumu Kimura 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: 20180239188Abstract: A display device includes a display surface with pixels including four sub-pixels of four colors, and being arrayed in a matrix of a first viewing angle direction and a second viewing angle direction orthogonal thereto. The first viewing angle direction in a direction parallel to the display surface of a main viewing angle direction that intersects with the display surface. A reflective member, first substrate, a second substrate facing the first substrate, a color filter with filters of four colors corresponding to the four sub-pixels, and a scattering member is provided on the second substrate. For the color filter, a change in transmittance of the filters per pixel in the main viewing angle direction is smaller than a change in transmittance of the filters per pixel in a direction orthogonal to the first viewing angle direction in the second viewing angle direction parallel to the display surface.Type: ApplicationFiled: April 18, 2018Publication date: August 23, 2018Inventors: Masaya TAMAKI, Yoko FUKUNAGA, Masashi MITSUI, Susumu KIMURA
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Patent number: 10032417Abstract: According to one embodiment, a light source device includes a plurality of light emitting elements including at least first and second light emitting elements, lightguide, first circuit, second circuit, and controller. The lightguide includes a first surface on which light from light emitting elements is incident and a second surface through which the light exits. The first circuit connects light emitting elements in series. The second circuit can bypass each of light emitting elements. The controller turns on light emitting elements using the first circuit if light emitting elements function normally, and if one of light emitting elements functions abnormally, the controller turns on the light emitting element functioning normally using the second circuit.Type: GrantFiled: December 1, 2016Date of Patent: July 24, 2018Assignee: Japan Display Inc.Inventors: Susumu Kimura, Kazuhiko Sako, Tadafumi Ozaki, Naoyuki Takasaki, Fumitaka Gotoh, Tsutomu Harada
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Publication number: 20180149801Abstract: According to one embodiment, an illumination device includes a light source, clad, and a plurality of cores. The clad includes a first edge at a light source side, a second edge opposite to the first edge, and a plurality of grooves formed by a plurality of partitions extending in parallel to each other from the first edge to the second edge. The cores are accommodated in the grooves, and each core includes an incident surface on which light from the light source is incident and an exit surface exposed from the groove to emit the light incident on the incident surface.Type: ApplicationFiled: January 25, 2018Publication date: May 31, 2018Inventors: Shigenori AOKI, Susumu KIMURA, Tsutomu HARADA, Naoyuki TAKASAKI
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Patent number: 9971190Abstract: According to an aspect, a display device includes: a display surface on which pixels each including sub-pixels of a plurality of colors are two-dimensionally arrayed; a reflective member; a first substrate provided with the reflective member; a second substrate arranged to face the first substrate; a color filter provided with filters of at least two colors corresponding to the sub-pixels; and a scattering member provided on the second substrate. A main viewing angle direction of the display device is a direction intersecting with the display surface. The color filter is formed such that a change in transmittance of the filters per pixel in the main viewing angle direction is smaller than a change in transmittance of the filters per pixel in a direction orthogonal to the main viewing angle direction in a direction parallel to the display surface.Type: GrantFiled: April 12, 2016Date of Patent: May 15, 2018Assignee: Japan Display Inc.Inventors: Masaya Tamaki, Yoko Fukunaga, Masashi Mitsui, Susumu Kimura
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Patent number: 9897743Abstract: According to one embodiment, an illumination device includes a light source, clad, and a plurality of cores. The clad includes a first edge at a light source side, a second edge opposite to the first edge, and a plurality of grooves formed by a plurality of partitions extending in parallel to each other from the first edge to the second edge. The cores are accommodated in the grooves, and each core includes an incident surface on which light from the light source is incident and an exit surface exposed from the groove to emit the light incident on the incident surface.Type: GrantFiled: August 27, 2015Date of Patent: February 20, 2018Assignee: Japan Display Inc.Inventors: Shigenori Aoki, Susumu Kimura, Tsutomu Harada, Naoyuki Takasaki
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Publication number: 20180047349Abstract: A display device includes an image display panel whose display is controlled by an image signal, a backlight which includes light sources and lights the image display panel from behind, and a display control section which calculates, based on the image signal, the required luminance value of the backlight for each divided area of the image display panel, calculates a tentative lighting level of each light source based on luminance distribution information for the backlight stored previously and the required luminance values, sets the lighting level of a first light source whose tentative lighting level exceeds an upper limit to the upper limit, determines the lighting level of a second light source whose tentative lighting level does not exceed the upper limit, based on the lighting level of the first light source, luminance distribution information, and required luminance value, and controls the backlight by the lighting levels.Type: ApplicationFiled: October 26, 2017Publication date: February 15, 2018Inventors: Naoyuki TAKASAKI, Tsutomu HARADA, Susumu KIMURA
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Patent number: 9830866Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate and an edge-lit light source that has light sources; and a controller. The controller sets luminance determination blocks by virtually dividing the image display panel in a light-source-arrangement-direction, identifies a luminance determination block with a highest luminance in the incidence direction, among luminance determination blocks at a same position in the light-source-arrangement-direction, identifies a luminance determination block the luminance of which is to be corrected by referring to luminance information of the light sources, and controls a light quantity of each of the light sources in such a manner that luminance of the identified luminance determination block is achieved.Type: GrantFiled: January 11, 2017Date of Patent: November 28, 2017Assignee: Japan Display Inc.Inventors: Naoyuki Takasaki, Tsutomu Harada, Susumu Kimura, Fumitaka Gotoh
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Patent number: 9830867Abstract: A display device includes an image display panel whose display is controlled by an image signal, a backlight which includes light sources and lights the image display panel from behind, and a display control section which calculates, based on the image signal, the required luminance value of the backlight for each divided area of the image display panel, calculates a tentative lighting level of each light source based on luminance distribution information for the backlight stored previously and the required luminance values, sets the lighting level of a first light source whose tentative lighting level exceeds an upper limit to the upper limit, determines the lighting level of a second light source whose tentative lighting level does not exceed the upper limit, based on the lighting level of the first light source, luminance distribution information, and required luminance value, and controls the backlight by the lighting levels.Type: GrantFiled: April 28, 2015Date of Patent: November 28, 2017Assignee: Japan Display Inc.Inventors: Naoyuki Takasaki, Tsutomu Harada, Susumu Kimura
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Publication number: 20170263199Abstract: According to an aspect, the liquid crystal display device includes: an expansion coefficient determining unit that determines an expansion coefficient of each of partial areas based on a signal level of the first, the second, and the third colors; a luminance level determining unit that determines a luminance level of each partial area based on the signal level; a signal processing unit that uses the expansion coefficient to expand the signal level; and a light source control unit that controls brightness of a light source based on the expansion coefficient and the luminance level. The light source can change the brightness of the partial areas individually. The light source control unit controls the light source such that the brightness of the light source in a partial area having a luminance level equal to or higher than a predetermined threshold is higher than the brightness based on the expansion coefficient.Type: ApplicationFiled: May 31, 2017Publication date: September 14, 2017Inventors: Susumu Kimura, Fumitaka Gotoh, Naoyuki Takasaki, Tsutomu Harada
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Publication number: 20170205663Abstract: According to an aspect, a reflective liquid-crystal display device includes a liquid-crystal panel and a front light unit. The liquid-crystal panel includes a sheet-like anisotropic scattering member having low refractive index areas and high refractive index areas with a refractive index higher than that of the low refractive index areas. The front light unit includes a light guide plate laminated on the liquid-crystal panel and having a number of grooves formed on a surface facing the liquid-crystal panel at a pitch of equal to or smaller than 100 ?m and a light source that makes light incident on the light guide plate. An arrangement interval of the unit pixels is larger than an average of an arrangement interval of the high refractive index area of the anisotropic scattering member.Type: ApplicationFiled: April 4, 2017Publication date: July 20, 2017Inventors: Yoko FUKUNAGA, Susumu KIMURA
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Patent number: 9691338Abstract: According to an aspect, the liquid crystal display device includes: an expansion coefficient determining unit that determines an expansion coefficient of each of partial areas based on a signal level of the first, the second, and the third colors; a luminance level determining unit that determines a luminance level of each partial area based on the signal level; a signal processing unit that uses the expansion coefficient to expand the signal level; and a light source control unit that controls brightness of a light source based on the expansion coefficient and the luminance level. The light source can change the brightness of the partial areas individually. The light source control unit controls the light source such that the brightness of the light source in a partial area having a luminance level equal to or higher than a predetermined threshold is higher than the brightness based on the expansion coefficient.Type: GrantFiled: November 20, 2015Date of Patent: June 27, 2017Assignee: Japan Display Inc.Inventors: Susumu Kimura, Fumitaka Gotoh, Naoyuki Takasaki, Tsutomu Harada
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Publication number: 20170162128Abstract: According to one embodiment, a light source device includes a plurality of light emitting elements including at least first and second light emitting elements, lightguide, first circuit, second circuit, and controller. The lightguide includes a first surface on which light from light emitting elements is incident and a second surface through which the light exits. The first circuit connects light emitting elements in series. The second circuit can bypass each of light emitting elements. The controller turns on light emitting elements using the first circuit if light emitting elements function normally, and if one of light emitting elements functions abnormally, the controller turns on the light emitting element functioning normally using the second circuit.Type: ApplicationFiled: December 1, 2016Publication date: June 8, 2017Inventors: Susumu Kimura, Kazuhiko Sako, Tadafumi Ozaki, Naoyuki Takasaki, Fumitaka Gotoh, Tsutomu Harada
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Patent number: 9645443Abstract: According to an aspect, a reflective liquid-crystal display device includes a liquid-crystal panel and a front light unit. The liquid-crystal panel includes a sheet-like anisotropic scattering member having low refractive index areas and high refractive index areas with a refractive index higher than that of the low refractive index areas. The front light unit includes a light guide plate laminated on the liquid-crystal panel and having a number of grooves formed on a surface facing the liquid-crystal panel at a pitch of equal to or smaller than 100 ?m and a light source that makes light incident on the light guide plate. An arrangement interval of the unit pixels is larger than an average of an arrangement interval of the high refractive index area of the anisotropic scattering member.Type: GrantFiled: March 19, 2014Date of Patent: May 9, 2017Assignee: Japan Display Inc.Inventors: Yoko Fukunaga, Susumu Kimura
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Publication number: 20170124961Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate and an edge-lit light source that has light sources; and a controller. The controller sets luminance determination blocks by virtually dividing the image display panel in a light-source-arrangement-direction, identifies a luminance determination block with a highest luminance in the incidence direction, among luminance determination blocks at a same position in the light-source-arrangement-direction, identifies a luminance determination block the luminance of which is to be corrected by referring to luminance information of the light sources, and controls a light quantity of each of the light sources in such a manner that luminance of the identified luminance determination block is achieved.Type: ApplicationFiled: January 11, 2017Publication date: May 4, 2017Inventors: Naoyuki TAKASAKI, Tsutomu HARADA, Susumu KIMURA, Fumitaka GOTOH
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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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Patent number: 9583049Abstract: According to an aspect, a display device includes an image display panel; a planar light source including a light guide plate and an edge-lit light source that has light sources; and a controller. The controller sets luminance determination blocks by virtually dividing the image display panel in a light-source-arrangement-direction, identifies a luminance determination block with a highest luminance in the incidence direction, among luminance determination blocks at a same position in the light-source-arrangement-direction, identifies a luminance determination block the luminance of which is to be corrected by referring to luminance information of the light sources, and controls a light quantity of each of the light sources in such a manner that luminance of the identified luminance determination block is achieved.Type: GrantFiled: October 21, 2014Date of Patent: February 28, 2017Assignee: Japan Display Inc.Inventors: Naoyuki Takasaki, Tsutomu Harada, Susumu Kimura, Fumitaka Gotoh
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Patent number: 9520094Abstract: According to an aspect, a display device includes: an image display panel; and a planar light source including a light guide plate and an edge-lit light source, the light guide plate illuminating the image display panel from a back side, the edge-lit light source including a plurality of light sources arranged facing a plane of incidence; and a controller that controls luminance of each of the light sources independently. The controller stores therein, as lookup tables for the respective light sources, information on light intensity distributions of light that is incident on the light guide plate from the respective light sources and is emitted to a plane of the image display panel from the light guide plate, and controls a light quantity of each of the light sources based on information on an input signal of an image, and on the lookup tables.Type: GrantFiled: October 21, 2014Date of Patent: December 13, 2016Assignee: Japan Display Inc.Inventors: Tsutomu Harada, Naoyuki Takasaki, Susumu Kimura, Yasuhisa Shiraishi
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Publication number: 20160223861Abstract: According to an aspect, a display device includes: a display surface on which pixels each including sub-pixels of a plurality of colors are two-dimensionally arrayed; a reflective member; a first substrate provided with the reflective member; a second substrate arranged to face the first substrate; a color filter provided with filters of at least two colors corresponding to the sub-pixels; and a scattering member provided on the second substrate. A main viewing angle direction of the display device is a direction intersecting with the display surface. The color filter is formed such that a change in transmittance of the filters per pixel in the main viewing angle direction is smaller than a change in transmittance of the filters per pixel in a direction orthogonal to the main viewing angle direction in a direction parallel to the display surface.Type: ApplicationFiled: April 12, 2016Publication date: August 4, 2016Inventors: Masaya Tamaki, Yoko FUKUNAGA, Masashi MITSUI, Susumu KIMURA
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Publication number: 20160148579Abstract: According to an aspect, the liquid crystal display device includes: an expansion coefficient determining unit that determines an expansion coefficient of each of partial areas based on a signal level of the first, the second, and the third colors; a luminance level determining unit that determines a luminance level of each partial area based on the signal level; a signal processing unit that uses the expansion coefficient to expand the signal level; and a light source control unit that controls brightness of a light source based on the expansion coefficient and the luminance level. The light source can change the brightness of the partial areas individually. The light source control unit controls the light source such that the brightness of the light source in a partial area having a luminance level equal to or higher than a predetermined threshold is higher than the brightness based on the expansion coefficient.Type: ApplicationFiled: November 20, 2015Publication date: May 26, 2016Inventors: Susumu Kimura, Fumitaka Gotoh, Naoyuki Takasaki, Tsutomu Harada
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Patent number: 9335580Abstract: According to an aspect, a display device includes: a display surface on which pixels each including sub-pixels of a plurality of colors are two-dimensionally arrayed; a reflective member; a first substrate provided with the reflective member; a second substrate arranged to face the first substrate; a color filter provided with filters of at least two colors corresponding to the sub-pixels; and a scattering member provided on the second substrate. A main viewing angle direction of the display device is a direction intersecting with the display surface. The color filter is formed such that a change in transmittance of the filters per pixel in the main viewing angle direction is smaller than a change in transmittance of the filters per pixel in a direction orthogonal to the main viewing angle direction in a direction parallel to the display surface.Type: GrantFiled: March 21, 2014Date of Patent: May 10, 2016Assignee: Japan Display Inc.Inventors: Masaya Tamaki, Yoko Fukunaga, Masashi Mitsui, Susumu Kimura