Patents by Inventor Hideyuki Chikazawa
Hideyuki Chikazawa 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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Patent number: 9350933Abstract: A display apparatus, comprising: a display panel including a display region displaying an image in front side at a center part of the display panel, and including a non-display region around the display region; a light guide plate arranged in rear side of the display panel, and being opposed to the display panel; an optical sheet arranged between the light guide plate and the display panel; and a support part arranged between the optical sheet and the light guide plate, and supporting an edge part of the optical sheet, wherein the optical sheet is opposed to the display region and the non-display region, and at least a part of the support part is located in the display region over a boundary between the non-display region and the display region.Type: GrantFiled: June 20, 2013Date of Patent: May 24, 2016Assignee: SHARP KABUSHIKI KAISHAInventor: Hideyuki Chikazawa
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Patent number: 9319621Abstract: A television receiver includes a reception section receiving television broadcast, and a display apparatus on which an image is displayed based on the television broadcast received by the reception section. The backlight chassis included in the display apparatus supports a light source unit emitting light for displaying an image and constitutes a part of an outer casing of the display apparatus. The backlight chassis has an integrally continuous circumferential wall formed of side walls vertically extending from the respective sides of the bottom wall of a rectangular shape. The circumferential wall surrounds the light source unit.Type: GrantFiled: June 20, 2013Date of Patent: April 19, 2016Assignee: SHARP KABUSHIKI KAISHAInventor: Hideyuki Chikazawa
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Publication number: 20150373857Abstract: In a display apparatus included in a television receiver, a cover covers peripheral edge part of a display panel for displaying an image from an outside of a backlight chassis that surrounds a peripheral surface of a display panel. The cover is configured by a plurality of cover sections, each of which covers a portion of the peripheral edge part of the display panel. On a cover section which is one of the plurality of cover sections, a protrusion which protrudes from an upper wall covering the peripheral surface of the display panel is provided. In an upper wall of the backlight chassis covering the peripheral surface of the display panel, an insertion hole is provided, and the protrusion is fixed with inserted into the insertion hole.Type: ApplicationFiled: June 20, 2013Publication date: December 24, 2015Applicant: SHARP KABUSHIKI KAISHAInventor: Hideyuki CHIKAZAWA
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Publication number: 20150341587Abstract: A display apparatus, comprising: a display panel including a display region displaying an image in front side at a center part of the display panel, and including a non-display region around the display region; a light guide plate arranged in rear side of the display panel, and being opposed to the display panel; an optical sheet arranged between the light guide plate and the display panel; and a support part arranged between the optical sheet and the light guide plate, and supporting an edge part of the optical sheet, wherein the optical sheet is opposed to the display region and the non-display region, and at least a part of the support part is located in the display region over a boundary between the non-display region and the display region.Type: ApplicationFiled: June 20, 2013Publication date: November 26, 2015Applicant: SHARP KABUSHIKI KAISHAInventor: Hideyuki CHIKAZAWA
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Publication number: 20150156446Abstract: A television receiver includes a reception section receiving television broadcast, and a display apparatus on which an image is displayed based on the television broadcast received by the reception section. The backlight chassis included in the display apparatus supports a light source unit emitting light for displaying an image and constitutes a part of an outer casing of the display apparatus. The backlight chassis has an integrally continuous circumferential wall formed of side walls vertically extending from the respective sides of the bottom wall of a rectangular shape. The circumferential wall surrounds the light source unit.Type: ApplicationFiled: June 20, 2013Publication date: June 4, 2015Applicant: SHARP KABUSHIKI KAISHAInventor: Hideyuki Chikazawa
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Patent number: 7750582Abstract: When the temperature value detected by a temperature detecting circuit is lower than a previously designated set temperature value, cathode fluorescent lamps (CFLs) are operated to illuminate with a duty ratio of 100% so as to enhance the brightness. When the detected temperature value has become equal to or higher than the previously designated set temperature value, CFLs are operated to illuminate by changing the duty ratio into a user set value.Type: GrantFiled: November 28, 2006Date of Patent: July 6, 2010Assignee: Sharp Kabushiki KaishaInventors: Mitsuhiro Moriyasu, Hideyuki Chikazawa
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Patent number: 7744233Abstract: In order to control light emission of light emitting diodes, current dividing circuits are used to supply currents of a substantially fixed level to all lines. Light emitting diodes are arranged in groups of a predetermined number of LEDs in series, and sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are laid out on the same straight line so as to form a single row. Substrates with these formed thereon are arranged adjacent to each other in the direction of the rows, so that sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are arranged alternately. With this configuration, it is possible to provide a backlight device with a plurality of LED arrays arranged thereon, which can uniformly illuminate the entire screen with light from the LED arrays.Type: GrantFiled: November 27, 2006Date of Patent: June 29, 2010Assignee: Sharp Kabushiki KaishaInventors: Mitsuhiro Moriyasu, Hideyuki Chikazawa, Masaki Shimizu
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Patent number: 7597451Abstract: To provide a backlight unit capable of improving color purity of a prescribed emission color as well as obtaining a uniform emission colors in the entire device, and a liquid crystal display device comprising thereof. Backlight unit B comprises: a LED 13 for compensating emission intensity of red wavelength light of a fluorescent tube 11, being arranged in between each of a plurality of said fluorescent tubes 11 arrayed in up and down directions, and a LED 13a for compensating emission intensity of red wavelength light of a fluorescent tube 11a, being arranged in the outside of each of two fluorescent tubes 11a arranged in the outermost of a plurality of said fluorescent tubes 11.Type: GrantFiled: September 5, 2006Date of Patent: October 6, 2009Assignee: Sharp Kabushiki KaishaInventors: Hideyuki Chikazawa, Mitsuhiro Moriyasu
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Publication number: 20090168396Abstract: In order to control light emission of light emitting diodes, current dividing circuits are used to supply currents of a substantially fixed level to all lines. Light emitting diodes are arranged in groups of a predetermined number of LEDs in series, and sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are laid out on the same straight line so as to form a single row. Substrates with these formed thereon are arranged adjacent to each other in the direction of the rows, so that sets of the light emitting diodes connected to the first line and sets of the light emitting diodes connected to the second line are arranged alternately. With this configuration, it is possible to provide a backlight device with a plurality of LED arrays arranged thereon, which can uniformly illuminate the entire screen with light from the LED arrays.Type: ApplicationFiled: November 27, 2006Publication date: July 2, 2009Inventors: Mitsuhiro Moriyasu, Hideyuki Chikazawa, Masaki Shimizu
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Publication number: 20070120505Abstract: When the temperature value detected by a temperature detecting circuit is lower than a previously designated set temperature value, cathode fluorescent lamps (CFLs) are operated to illuminate with a duty ratio of 100% so as to enhance the brightness. When the detected temperature value has become equal to or higher than the previously designated set temperature value, CFLs are operated to illuminate by changing the duty ratio into a user set value.Type: ApplicationFiled: November 28, 2006Publication date: May 31, 2007Inventors: Mitsuhiro Moriyasu, Hideyuki Chikazawa
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Publication number: 20070059991Abstract: [PROBLEMS] To prevent mistake of fitting position and fitting direction of each substrate when a plurality of substrates is fitted in a base member. [MEANS FOR SOLVING PROBLEMS] Backlight unit X in a LCD device comprises such as a plurality of LED substrates 10 respectively mounting a plurality of LED elements 11 for illuminating each division multi-divided from the entire area of a LCD panel, and Chassis 1 as a base member in which LED substrates 10 are aligned and fitted, wherein Fitting position distinguishing mark 12 indicating a designed (qualified) fitting position of a relevant LED substrate 10 in Chassis 1 is recorded on each of a plurality of LED substrates 10. Fitting position distinguishing mark 12 is the mark graphically displaying the area to be covered by a relevant LED substrate 10 in the entire Chassis 1 when the LED substrate 10 is fitted in Chassis 1 as designed.Type: ApplicationFiled: September 5, 2006Publication date: March 15, 2007Applicant: Sharp Kabushiki KaishaInventors: Hideyuki Chikazawa, Mitsuhiro Moriyasu
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Publication number: 20070058358Abstract: [Problems]To provide a backlight unit capable of improving color purity of a prescribed emission color as well as obtaining a uniform emission colors in the entire device, and a liquid crystal display device comprising thereof. [Means for Solving Problems] Backlight unit B comprises: a LED 13 for compensating emission intensity of red wavelength light of a fluorescent tube 11, being arranged in between each of a plurality of said fluorescent tubes 11 arrayed in up and down directions, and a LED 13a for compensating emission intensity of red wavelength light of a fluorescent tube 11a, being arranged in the outside of each of two fluorescent tubes 11a arranged in the outermost of a plurality of said fluorescent tubes 11.Type: ApplicationFiled: September 5, 2006Publication date: March 15, 2007Applicant: Sharp Kabushiki KaishaInventors: Hideyuki Chikazawa, Mitsuhiro Moriyasu