Patents by Inventor Toshiyuki Gotoh
Toshiyuki Gotoh 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: 11604383Abstract: A display device includes a housing, a display panel, a light source, a first acquirer, a second acquirer, and a stabilizer. The display panel is provided in the housing. The light source is provided in the housing, and includes an LED that irradiates the display panel with light. The first acquirer acquires a first temperature in a first region including a region where the light source is disposed in the housing. The second acquirer acquires a second temperature in a second region different from the first region. The stabilizer has a first adjustment mode for lighting the LED with maximum luminance as an adjustment mode for stabilizing luminance of the LED. The stabilizer operates the LED in the first adjustment mode in a case where a temperature difference between the first temperature and the second temperature is a first threshold value or more.Type: GrantFiled: April 20, 2022Date of Patent: March 14, 2023Assignee: SHARP KABUSHIKI KAISHAInventors: Masaki Nishizaka, Katsuaki Yamada, Tomohiko Okada, Wooseong Jeong, Toshiyuki Gotoh, Hidenori Ishii
-
Publication number: 20220342261Abstract: A display device includes a housing, a display panel, a light source, a first acquirer, a second acquirer, and a stabilizer. The display panel is provided in the housing. The light source is provided in the housing, and includes an LED that irradiates the display panel with light. The first acquirer acquires a first temperature in a first region including a region where the light source is disposed in the housing. The second acquirer acquires a second temperature in a second region different from the first region. The stabilizer has a first adjustment mode for lighting the LED with maximum luminance as an adjustment mode for stabilizing luminance of the LED. The stabilizer operates the LED in the first adjustment mode in a case where a temperature difference between the first temperature and the second temperature is a first threshold value or more.Type: ApplicationFiled: April 20, 2022Publication date: October 27, 2022Inventors: Masaki NISHIZAKA, Katsuaki YAMADA, Tomohiko OKADA, Wooseong JEONG, Toshiyuki GOTOH, Hidenori ISHII
-
Patent number: 9230487Abstract: A display device that can adjust brightness of each of a plurality of regions of an image by performing local dimming executes local dimming in a case of displaying a multi-color image (color image), and does not execute local dimming in a case of displaying a grayscale image. Moreover, in a case of displaying a mixed image of a multi-color image and a grayscale image, the display device does not execute local dimming in regions including a grayscale image among a plurality of regions of an image. Displaying a multi-color image at high contrast and displaying a grayscale image at high tone reproduction are both achieved.Type: GrantFiled: February 25, 2013Date of Patent: January 5, 2016Assignee: Sharp Kabushiki KaishaInventor: Toshiyuki Gotoh
-
Publication number: 20150206484Abstract: Provided is a display apparatus that is possible to reduce the number of drivers required without increasing controllable CHs (channels) in the driver for driving a light emitting device, and aims for reduction in cost and size of the display apparatus. The display apparatus includes a display panel for displaying an image based on a vertical synchronization signal and a horizontal synchronization signal and a plurality of light emitting devices illuminates the display panel from the back side of the display panel, and turns on and turns off the plurality of light emitting devices divided into several groups. In the display apparatus, the cycle of the vertical synchronization signal is divided into periods equal to the number of the divided light emitting device groups, and turning on and turning off the light emitting devices of each group is performed one after another.Type: ApplicationFiled: July 19, 2013Publication date: July 23, 2015Applicant: SHARP KABUSHIKI KAISHAInventor: Toshiyuki Gotoh
-
Publication number: 20150055025Abstract: A display device that can adjust brightness of each of a plurality of regions of an image by performing local dimming executes local dimming in a case of displaying a multi-color image (color image), and does not execute local dimming in a case of displaying a grayscale image. Moreover, in a case of displaying a mixed image of a multi-color image and a grayscale image, the display device does not execute local dimming in regions including a grayscale image among a plurality of regions of an image. Displaying a multi-color image at high contrast and displaying a grayscale image at high tone reproduction are both achieved.Type: ApplicationFiled: February 25, 2013Publication date: February 26, 2015Inventor: Toshiyuki Gotoh
-
Patent number: 8933873Abstract: In a display apparatus provided with a backlight which includes a plurality of color components and emits light of a color of white or other colors and with a liquid crystal display section, RGB values for identifying a color of light which passes through the liquid crystal display section assuming that the backlight emits white light are calculated, first RGB values representing a transmittance of the liquid crystal display section are calculated based on the RGB values, and the liquid crystal display section is driven based on the first RGB values.Type: GrantFiled: June 22, 2012Date of Patent: January 13, 2015Assignee: Sharp Kabushiki KaishaInventor: Toshiyuki Gotoh
-
Patent number: 8860746Abstract: When conducting video display with a wide color gamut display based on a video signal conforming to a standard (sRGB standard and the like) having a color reproduction range narrower than that of the wide color gamut display, the video processing circuit 2 corrects a color in a prescribed correction target color range partly including a red hue reference range as a center part in the color range of an equal hue from achromatic colors having the lowest saturation to red having the highest saturation in an expanded color reproduction range but not including red having the highest saturation in the expanded color reproduction range, so that the hue may change to a hue akin to yellow in the expanded color reproduction range. In so doing, the hue in the red hue reference range changes to red hue in the color reproduction range conforming to the sRBG standard.Type: GrantFiled: August 27, 2009Date of Patent: October 14, 2014Assignee: Sharp Kabushiki KaishaInventors: Toshiyuki Fujine, Takashi Kanda, Toshiyuki Gotoh, Naoko Kondoh
-
Patent number: 8842109Abstract: The occurrence of the halo phenomenon caused in a display panel unit is detected in a liquid crystal display device that displays an image in the display panel unit including color filters of a plurality of colors by respectively controlling emission ratios of a plurality of LEDs emitting lights of colors respectively corresponding to the plurality of color filters. Upon detection, a part of the display panel unit, for example, the channel number and the vicinity thereof are set as a non-detection area in which the detection of the halo phenomenon is restricted and the remaining area is set as a detection area. The chroma of light, which corresponds to mixed light from the plurality of LEDs, is reduced by controlling the emission ratios of the LEDs on the basis of the detection result in the detection area, so that the color of light is closer to white.Type: GrantFiled: January 16, 2010Date of Patent: September 23, 2014Assignee: Sharp Kabushiki KaishaInventors: Naoko Kondoh, Toshiyuki Gotoh, Yasushi Tetsuka
-
Patent number: 8723848Abstract: It is expected to provide an image display apparatus and image display method that can reduce the risk that an image quality is undermined due to a halo phenomenon caused by the leak of light passing through a non-corresponding color filter from a LED. The image display apparatus can respectively control luminous efficiencies of plural color LEDs, i.e., R-LED (11a), G-LED (11b) and B-LED (11c) that emit light through a color filter to a displaying unit. The image display apparatus obtains luminous efficiencies for a frame of RGB image signal (S2), calculates a light leak amount and then detects whether the halo phenomenon may occur or not (S3-S5). When the halo phenomenon is considered to occur, the luminous efficiencies of LEDs (11a, 11b, 11c) included in the liquid crystal display apparatus are controlled to make the light from the LEDs (11a, 11b, 11c) become close to white light (S8).Type: GrantFiled: September 16, 2009Date of Patent: May 13, 2014Assignee: Sharp Kabushiki KaishaInventors: Naoko Kondoh, Toshiyuki Gotoh, Hozumi Nishimura
-
Publication number: 20130120481Abstract: An image display apparatus comprising: a driver apparatus; and a total of N device groups of a first group to an N-th group (2?N) each of which includes one or a plurality of light emitting devices, the image display apparatus uses the driver apparatus to make each of the device groups emit light preventing light emission capable periods from overlapping one another and displays an image by using the obtained light as backlight; wherein the driver apparatus includes: a power output circuit that outputs light emission power used for the light emission of the light emitting device; and a switch mechanism that switches, in accordance with arrival of the light emission capable period of a device group K (1?K?N), an output destination of the light emission power output from the power output circuit to the device group K.Type: ApplicationFiled: April 20, 2011Publication date: May 16, 2013Applicant: Sharp Kabushiki KaishaInventors: Takayuki Murai, Kohji Fujiwara, Toshiyuki Gotoh
-
Publication number: 20120327134Abstract: In a display apparatus provided with a backlight which includes a plurality of color components and emits light of a color of white or other colors and with a liquid crystal display section, RGB values for identifying a color of light which passes through the liquid crystal display section assuming that the backlight emits white light are calculated, first RGB values representing a transmittance of the liquid crystal display section are calculated based on the RGB values, and the liquid crystal display section is driven based on the first RGB values.Type: ApplicationFiled: June 22, 2012Publication date: December 27, 2012Inventor: Toshiyuki GOTOH
-
Publication number: 20120327136Abstract: A liquid crystal display device (1) includes a backlight device (backlight unit) (3) and a liquid crystal panel (display unit) (2) and displays information with one frame period divided into first to third subfield periods. The liquid crystal panel (2) displays information using illumination light from the backlight device (3). In the liquid crystal display device (1), a plurality of illumination areas are set that make light from light emitting diodes (light sources) (11) incident on a plurality of display areas, respectively. A local dimming calculation unit (6) is provided to, in each of the first to third subfield periods, calculate luminance values based on an input image signal on a per illumination area basis and on a per light emitting diode (11) basis, and calculate per-pixel transmittances based on determined luminance values.Type: ApplicationFiled: January 7, 2011Publication date: December 27, 2012Applicant: Sharp Kabushiki KaishaInventors: Kazuhiro Uehara, Toshiyuki Gotoh
-
Publication number: 20120324437Abstract: In service providing apparatus and method, system identification data for specifying a service target device and the user of the device concerned are issued to the device concerned, and authentication processing is carried out on the basis of the system identification data to provide a service to the device concerned.Type: ApplicationFiled: August 27, 2012Publication date: December 20, 2012Applicant: Sony CorporationInventors: Haruhiko Sakaguchi, Tomihiko Nakajima, Yoshifumi Ueno, Tetsuo Sasaki, Osamu Aoki, Akinori Iida, Masayuki Kobuna, Shinichiro Taya, Kazuhiro Gotoh, Toshiyuki Gotoh, Motohiro Ohama
-
Publication number: 20120313985Abstract: A liquid crystal display device (101) including a liquid crystal panel (4) and an LED backlight (5) which is provided with a plurality of LEDs (5R, 5G, and 5B) that emit light of different colors from a backside of the liquid crystal panel (4), the liquid crystal display device (1), in accordance with a video signal supplied thereto, (i) displaying a color image by controlling an aperture ratio of the liquid crystal panel (4) and luminances of the respective plurality of LEDs (5R, 5G, and 5B), and (ii) controlling the luminances of the respective plurality of LEDs (5R, 5G, and 5B) by pulse width modulation, the liquid crystal display device (101) includes: period dividing means (15) for dividing a frame of a video signal into a plurality of periods; and a pulse width modulating section (20) which generates a pulse signal for causing each of the plurality of LEDs (5R, 5G, and 5B) to emit light so that for each of the plurality of periods into which the period dividing means (15) has divided the frame, the plurType: ApplicationFiled: December 13, 2010Publication date: December 13, 2012Applicant: Sharp Kabushiki KaishaInventor: Toshiyuki Gotoh
-
Publication number: 20120293571Abstract: An image display device of the present invention includes a subframe generation section (10) for dividing one frame of a video signal into a first subframe during which at least a green (G) light source emits light, a second subframe during which at least a red (R) light source emits light, and a third subframe during which a blue (B) light source emits light. The subframe generation section (10) finds a difference between (i) a signal to be displayed, which signal is obtained from an aperture ratio corrected in the first subframe and luminance distribution of a light source corresponding to a red (R) video signal included in the first subframe and (ii) the red (R) video signal included in the first subframe, and corrects, according to the difference found in the first subframe, an aperture ratio corrected in the second subframe. This prevents insufficiency of luminance, and thus makes it possible to carry out an accurate color display.Type: ApplicationFiled: December 15, 2010Publication date: November 22, 2012Applicant: Sharp Kabushiki KaishaInventor: Toshiyuki Gotoh
-
Patent number: 8300819Abstract: In service providing apparatus and method, system identification data for specifying a service target device and the user of the device concerned are issued to the device concerned, and authentication processing is carried out on the basis of the system identification data to provide a service to the device concerned.Type: GrantFiled: February 25, 2003Date of Patent: October 30, 2012Assignee: Sony CorporationInventors: Haruhiko Sakaguchi, Tomihiko Nakajima, Yoshifumi Ueno, Tetsuo Sasaki, Osamu Aoki, Akinori Iida, Masayuki Kobuna, Shinichiro Taya, Kazuhiro Gotoh, Toshiyuki Gotoh, legal representative, Motohiro Ohama
-
Publication number: 20110285681Abstract: The occurrence of the halo phenomenon caused in a display panel unit is detected in a liquid crystal display device that displays an image in the display panel unit including color filters of a plurality of colors by respectively controlling emission ratios of a plurality of LEDs emitting lights of colors respectively corresponding to the plurality of color filters. Upon detection, a part of the display panel unit, for example, the channel number and the vicinity thereof are set as a non-detection area in which the detection of the halo phenomenon is restricted and the remaining area is set as a detection area. The chroma of light, which corresponds to mixed light from the plurality of LEDs, is reduced by controlling the emission ratios of the LEDs on the basis of the detection result in the detection area, so that the color of light is closer to white.Type: ApplicationFiled: January 16, 2010Publication date: November 24, 2011Inventors: Naoko Kondoh, Toshiyuki Gotoh, Yasushi Tetsuka
-
Publication number: 20110279740Abstract: When a wide color gamut display displays video based on a video signal that complies with a narrower color reproduction range standard, in order to make full use of the feature of the wide color gamut display capable of displaying highly saturated and vivid reds, while eliminating the problem of seeing glaring images in the part of the red color region near the highest brightness and saturation, a video processing circuit (2) reduces and corrects the signal value of the input video signal, which represents the colors within the color range to be corrected, which is within a specified saturation range from the highest saturation to the middle saturation inside a specified hue range centered on the red hue in the color reproduction range (an expanded color reproduction range wider than the sRGB standard color reproduction range) of a liquid crystal panel (4), and which is within a specified brightness range from the highest brightness to the middle brightness inside that range, so that the saturation and brightType: ApplicationFiled: January 12, 2010Publication date: November 17, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Toshiyuki Fujine, Takashi Kanda, Toshiyuki Gotoh, Naoko Kondoh
-
Publication number: 20110199541Abstract: When conducting video display with a wide color gamut display based on a video signal conforming to a standard (sRGB standard and the like) having a color reproduction range narrower than that of the wide color gamut display, the video processing circuit 2 corrects a color in a prescribed correction target color range partly including a red hue reference range as a center part in the color range of an equal hue from achromatic colors having the lowest saturation to red having the highest saturation in an expanded color reproduction range but not including red having the highest saturation in the expanded color reproduction range, so that the hue may change to a hue akin to yellow in the expanded color reproduction range. In so doing, the hue in the red hue reference range changes to red hue in the color reproduction range conforming to the sRBG standard.Type: ApplicationFiled: August 27, 2009Publication date: August 18, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Toshiyuki Fujine, Takashi Kanda, Toshiyuki Gotoh, Naoko Kondoh
-
Publication number: 20110187735Abstract: In order to simply and easily implement an elimination of a color deviation and a color adjustment for a color correction to a favorable color in an arbitrary portion of a color region in a color reproduction range, a video processing circuit 2 corrects a luminance, a saturation and a hue of a color by the correction quantity corresponding to a reference correction coefficient with regard to a signal value of an input video signal indicating a color within a designated color region defined by a designated range of the luminance, the saturation and the hue when the color indicated by the signal value is a color in the center of the designated color region or at a core for occupying a predetermined range around the center.Type: ApplicationFiled: August 27, 2009Publication date: August 4, 2011Applicant: SHARP KABUSHIKI KAISHAInventors: Naoko Kondoh, Toshiyuki Gotoh