Patents by Inventor Tsutomu Harada
Tsutomu Harada 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: 20240129430Abstract: According to one embodiment, a display device includes a display panel having a display area where an image is displayed, a plurality of cameras provided at positions overlapping with the display area in plan view to capture a user opposed to the display device as a subject, a controller selecting one of the plurality of cameras as a camera to capture the subject, based on positions of eyes of a person included in the image displayed in the display area.Type: ApplicationFiled: October 16, 2023Publication date: April 18, 2024Inventors: Kazunari TOMIZAWA, Naoshi GOTO, Tsutomu HARADA, Junji KOBASHI
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Patent number: 11948522Abstract: According to an aspect, a display device includes: an image display panel having an image display surface on which display is to be controlled based on an image signal; a light source device that includes light sources provided corresponding to divided partial areas of the image display surface, and is configured to illuminate the image display surface; and a signal processor configured to calculate a light quantity of each light source for each of the partial areas. The signal processor is configured to calculate the light quantity for each partial area based on the image signal, set one of the partial areas as an adjustment target partial area for the light quantity, and adjust the light quantity in the adjustment target partial area when the light quantity of an adjacent partial area located around the adjustment target partial area is equal to or smaller than a predetermined value.Type: GrantFiled: September 16, 2021Date of Patent: April 2, 2024Assignee: Japan Display Inc.Inventors: Kazuhiko Sako, Tsutomu Harada
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Publication number: 20240105135Abstract: A display device includes: a display panel with pixels arranged in a first direction and a second direction; and a light source. Each pixel includes: a first sub-pixel including a color filter for a first color; and a second sub-pixel arranged adjacent to the first sub-pixel in the first direction and including a color filter for a complementary color between a second color and a third color. The light source includes: a first light emitter configured to emit light in the first color; a second light emitter configured to emit light in the second color; and a third light emitter configured to emit light in the third color. One frame period includes: a first light emission period of causing the first and second light emitters to emit light simultaneously; and a second light emission period of causing the first and third light emitters to emit light simultaneously.Type: ApplicationFiled: September 21, 2023Publication date: March 28, 2024Inventors: Kazunari TOMIZAWA, Tsutomu HARADA
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Patent number: 11935497Abstract: According to an aspect, a display device includes: a first panel including pixels; a second panel including light control pixels; and a light source. When any of the pixels is controlled to transmit light in accordance with an input image signal, blurring processing is applied, a blurring area is formed, and light from the light source transmits through the blurring area and the pixel controlled to transmit light and is emitted from the first panel. When a straight line connecting a user viewpoint and the pixel controlled to transmit light has an angle relative to a normal to the first panel, a center of the blurring area is at a position shifted to a side opposite to a reference normal side relative to the normal to the first panel passing through a center of the pixel. The reference normal is a normal to the first panel passing through the viewpoint.Type: GrantFiled: October 4, 2022Date of Patent: March 19, 2024Assignee: Japan Display Inc.Inventors: Tomoyuki Ishihara, Tsutomu Harada
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Publication number: 20240078965Abstract: A display device includes a plurality of light-emitting elements, and a control circuit configured to control drive of the light-emitting elements. The control circuit divides one frame period into a plurality of subframe periods having different lengths and controls light emission and non-emission of the light-emitting elements for each of the subframe periods.Type: ApplicationFiled: September 1, 2023Publication date: March 7, 2024Inventors: Kazunari TOMIZAWA, Kazuhiko SAKO, Tsutomu HARADA
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Publication number: 20240062707Abstract: A display device includes a plurality of light emitting devices included in a pixel, and a control circuit configured to define each of a plurality of subframe periods included in a frame period during which a frame image is displayed as one of an emission period in which the light emitting device is in an emission state and a non-emission period in which the light emitting device is in a non-emission state, and to control emission of the light emitting device, based on a gradation value of the pixel.Type: ApplicationFiled: August 4, 2023Publication date: February 22, 2024Inventors: Tsutomu HARADA, Kazunari TOMIZAWA
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Publication number: 20240046898Abstract: Each pair of pixels including two pixels adjacent to each other includes two first sub pixels, two second sub pixels, and two third sub pixels. One of the two first sub pixels and one of the two second sub pixels are included in one of the pair of pixels. The other of the two second sub pixels and one of the two third sub pixels are included in the other of the pair of pixels. The other of the two third sub pixels and the other of the two first sub pixels are disposed across and included in both of the pair of pixels. The drive circuit allocates the gradation data of one pixel to the gradation data of another pixel adjacent to the one pixel and drives the first, second, and third sub pixels included in the other pixel based on the gradation data of the other pixel.Type: ApplicationFiled: July 28, 2023Publication date: February 8, 2024Inventors: Tsutomu HARADA, Kazunari TOMIZAWA
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Patent number: 11842698Abstract: According to an aspect, a display device includes: a first panel; a second panel disposed opposing one surface of the first panel; a light source configured to emit light to the other surface of the first panel; and an acquirer configured to acquire user information including information indicating at least one of a position of an eye and a position of a head of a user facing the second panel. The first panel includes light control pixels. The second panel includes pixels. Blurring processing is applied by which the light control pixel positioned around a pixel controlled to transmit light in accordance with an input image signal is caused to transmit light. A blurring area including the light control pixel to which the blurring processing is applied on the first panel corresponds to the position of the eye of the user or the position of the head of the user.Type: GrantFiled: October 5, 2022Date of Patent: December 12, 2023Assignee: Japan Display Inc.Inventors: Tsutomu Harada, Tomoyuki Ishihara
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Patent number: 11841582Abstract: A display device is provided and including a backlight device including a plurality of light sources; a display panel disposed to oppose the backlight device and incline with respect to a direction perpendicular to an optical axis of the backlight device; a first diffusion plate between the display panel and the backlight device; and a second diffusion plate arranged at a predetermined angle with respect to the first diffusion plate.Type: GrantFiled: January 8, 2021Date of Patent: December 12, 2023Assignee: Japan Display Inc.Inventors: Tsutomu Harada, Shigenori Aoki, Koji Yoshida, Masayuki Mifune
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Publication number: 20230393697Abstract: A display device is provided and includes display part having first and second electrodes; and input part having substrate and detection electrode between substrate and display part, wherein display part including display area that displays image, input part including conductive layer provided between substrate and display part and overlapping detection electrode in display area, detection electrode is glued to conductive layer which has first region outside display area, first regain overlapping substrate and not overlapping detection electrode.Type: ApplicationFiled: August 22, 2023Publication date: December 7, 2023Inventors: Hayato KURASAWA, Kohei AZUMI, Koji ISHIZAKI, Hideki KANEKO, Tsutomu HARADA
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Patent number: 11789322Abstract: According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.Type: GrantFiled: December 30, 2022Date of Patent: October 17, 2023Assignee: Japan Display Inc.Inventors: Kazunari Tomizawa, Tsutomu Harada
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Patent number: 11783742Abstract: A display device includes: a first panel comprising pixels; and a second panel having a plate surface provided substantially parallel to a plate surface of the first panel. The plate surface of each of the first and second panels includes a curved surface. When the curved surface is a convex portion and two pixels controlled to transmit the light through the first panel are located in the convex portion, a distance between centers of two predetermined regions to which a blurring processing is applied corresponding to the two pixels is set smaller than a distance between the two the pixels. When the curved surface is a concave portion and the two pixels controlled to transmit the light through the first panel are located in the concave portion, the distance between the centers of the two predetermined regions is set larger than the distance between the two the pixels.Type: GrantFiled: May 18, 2022Date of Patent: October 10, 2023Assignee: JAPAN DISPLAY INC.Inventors: Tomoyuki Ishihara, Tsutomu Harada
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Publication number: 20230298512Abstract: According to an aspect, a display device includes a pixel including a first sub-pixel configured to emit light having a peak in a spectrum of red, a second sub-pixel configured to emit light having a peak in a spectrum of green, and a third sub-pixel configured to emit light having a peak in a spectrum of blue. The first sub-pixel, the second sub-pixel, and the third sub-pixel are inorganic light-emitting diodes. A light emission intensity of the second sub-pixel is increased at a predetermined ratio with respect to a light emission intensity of the first sub-pixel when the first sub-pixel emits light at a light emission intensity within a low-luminance range equal to or lower than a predetermined level of luminance.Type: ApplicationFiled: April 21, 2023Publication date: September 21, 2023Inventors: Kazuhiko SAKO, Kazunari TOMIZAWA, Tsutomu HARADA
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Patent number: 11749214Abstract: A display device is provided and includes display panel comprising plurality of pixels; and light source device configured to emit light that illuminates display panel, wherein display panel is configured to control operation of light source device, display panel does not lower luminance of light for second predetermined time or longer after display panel has raised luminance of light by predetermined amount of luminance change or more within first predetermined time, and when image changes from first image other than raster image and ramp image to second image that is either of raster image and ramp image, display panel lowers luminance of light within time shorter than second predetermined time even after luminance of light has been raised by predetermined amount of luminance change or more within first predetermined time.Type: GrantFiled: March 22, 2021Date of Patent: September 5, 2023Assignee: Japan Display Inc.Inventors: Kazuhiko Sako, Tsutomu Harada, Naoyuki Takasaki, Toshiyuki Nagatsuma
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Publication number: 20230274711Abstract: According to one embodiment, an electronic device includes a display panel configured to display an image and including a display region that transmits external light, a light source unit, a camera opposed to the display region of the display panel, and a control unit. The control unit is configured to in a light emission period, permit irradiation of light by the light source unit, irradiate the display region with light, display the image in the display region, and prohibit capturing by the camera. The control unit is configured to in a capturing period, prohibit the irradiation of the light by the light source unit, set the display region to be transparent, permit the capturing by the camera, and take in the external light transmitted through the display region to the camera.Type: ApplicationFiled: February 23, 2023Publication date: August 31, 2023Applicant: Japan Display Inc.Inventors: Kentaro OKUYAMA, Kazuhiko SAKO, Tsutomu HARADA, Takayuki NAKANISHI, Kazunari TOMIZAWA
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Patent number: 11740747Abstract: Display device is provided and includes display part including first and second substrates, first and second polarizing plates, display area that includes pixel electrodes, a common electrode and display functional layer each of which is arranged between first and second substrates, display image formed by applying display voltage between pixel electrodes and common electrode in display period, input part including third substrate having back surface facing front surface of display part, detection electrodes formed on back surface of third substrate, and conductive layer provided between back surface of third substrate and front surface of display part, wherein conductive layer overlaps third substrate without through detection electrodes outside display area, and part of detection electrodes is uncovered by conductive layer outside display area.Type: GrantFiled: March 28, 2022Date of Patent: August 29, 2023Assignee: Japan Display Inc.Inventors: Hayato Kurasawa, Kohei Azumi, Koji Ishizaki, Hideki Kaneko, Tsutomu Harada
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Patent number: 11735132Abstract: A display device includes: a display panel to display a frame image by arranging line images; and a light source. One frame period includes sub-frame periods each including a writing period and a display period. The line images are written in units of a predetermined number of lines during the writing period. The line images that are written at a time in units of the predetermined number of lines are the same image. In two continuous sub-frame periods in the one frame period, when a line image to be written during the writing period in a preceding sub-frame period differs from a line image to be written during the writing period in a subsequent sub-frame period, a start position of the writing period in the preceding sub-frame period and a start position of the writing period in the subsequent sub-frame period are shifted by one line from each other.Type: GrantFiled: December 16, 2021Date of Patent: August 22, 2023Assignee: Japan Display Inc.Inventors: Tadafumi Ozaki, Tsutomu Harada
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Publication number: 20230236416Abstract: According to an aspect, a head-up display device, includes: a display panel configured to display a third image that is a composite of first and second images; a parallax generator configured to generate parallax of the first image and parallax of the second image; and a projection destination part onto which projection light emitted from a display surface side of the display panel and modulated by the parallax generator is projected.Type: ApplicationFiled: March 28, 2023Publication date: July 27, 2023Inventors: Tsutomu HARADA, Daisuke OZEKI, Junji KOBASHI
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Patent number: 11663959Abstract: According to an aspect, a display device includes a pixel including a first sub-pixel configured to emit light having a peak in a spectrum of red, a second sub-pixel configured to emit light having a peak in a spectrum of green, and a third sub-pixel configured to emit light having a peak in a spectrum of blue. The first sub-pixel, the second sub-pixel, and the third sub-pixel are inorganic light-emitting diodes. A light emission intensity of the second sub-pixel is increased at a predetermined ratio with respect to a light emission intensity of the first sub-pixel when the first sub-pixel emits light at a light emission intensity within a low-luminance range equal to or lower than a predetermined level of luminance.Type: GrantFiled: April 22, 2022Date of Patent: May 30, 2023Assignee: Japan Display Inc.Inventors: Kazuhiko Sako, Kazunari Tomizawa, Tsutomu Harada
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Publication number: 20230134431Abstract: According to one embodiment, a display device includes a plurality of red subpixels, a plurality of green subpixels, and a plurality of blue subpixels, wherein, in a first direction, the red subpixel and the green subpixel, the green subpixel and the blue subpixel, and the blue subpixel and the red subpixel are arranged to be adjacent to each other, and in a second direction, the red subpixel and the blue subpixel, the blue subpixel and the green subpixel, and the green subpixel and the red subpixel are arranged to be adjacent to each other, and in the subpixels, as to subpixel columns adjacent to each other, when an image signal of the same gradation is input with respect to the subpixels of same color, brightness of one subpixel column is higher than that of another subpixel column.Type: ApplicationFiled: December 30, 2022Publication date: May 4, 2023Applicant: Japan Display Inc.Inventors: Kazunari TOMIZAWA, Tsutomu HARADA