Patents by Inventor Chi Wan To
Chi Wan To 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: 10133120Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.Type: GrantFiled: October 5, 2017Date of Patent: November 20, 2018Assignee: Dolby Laboratories Licensing CorporationInventors: Chun Chi Wan, Ajit Ninan
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Publication number: 20180258587Abstract: The present invention provides a method of carbonating carbon dioxide with high purity using a paper mill waste sludge by preparing a paper mill waste sludge which is a waste product discharged during the production of papermaking, adding acid to the paper mill waste sludge and reacting the acid therewith to produce a mixed solution and stirring, separating a supernatant of the mixed solution into an eluate, adding a basic substance to the eluate and adjusting pH to precipitate some of the ions in the eluate, and then adding a reaction initiator to the eluate in which some ions are precipitated and removed, and injecting carbon dioxide for a carbonation reaction.Type: ApplicationFiled: November 9, 2017Publication date: September 13, 2018Applicant: Korea Institute Of Geoscience And Mineral ResourcesInventors: Chi-Wan JEON, Sang-Won PARK, Jun-Hwan BANG, Kyung-Sun SONG, Seung-Woo LEE, Hwan-Ju JO
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Publication number: 20180174534Abstract: A non-uniform illumination pattern is determined with a display panel of a display device. The non-uniform illumination pattern comprises different values of the one or more illumination properties in first and second spatial regions of the display panel. An illumination compensation pattern is generated based at least in part on the non-uniform illumination pattern. The illumination compensation pattern is configured to homogenize values of the illumination properties in a plurality of spatial regions of the display panel that include the first and second spatial regions, and implemented in the display device.Type: ApplicationFiled: March 19, 2015Publication date: June 21, 2018Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Ajit NINAN, Chun Chi WAN
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Publication number: 20180174532Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light into second light. The light conversion layer can include quantum dots or phosphor materials. Modulation drive signals are generated to determine transmission of the second light through individual subpixels of the display. These modulation drive signals can be adjusted based on one or more light field simulations. The light field simulations can include: (i) a color shift for a pixel based on a point spread function of the illumination sources; (ii) binning difference of individual illumination sources; (iii) temperature dependence of display components on performance; or (iv) combinations thereof.Type: ApplicationFiled: January 31, 2018Publication date: June 21, 2018Applicant: DOLBY LABORATORIES LICENSING CORPORATIONInventors: Ajit NINAN, Chun Chi WAN
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Publication number: 20180120573Abstract: An eyewear device comprises a left lens assembly and a right lens assembly. The left lens assembly includes a left focus tunable lens and a left focus fixed lens. A right lens assembly includes a right focus tunable lens and a right focus fixed lens. The eyewear device may be used in 3D display applications, virtual reality applications, augmented reality applications, remote presence applications, etc. The eyewear device may also be used as vision correction glasses.Type: ApplicationFiled: October 30, 2017Publication date: May 3, 2018Applicant: Dolby Laboratories Licensing CorporationInventors: Ajit NINAN, Chaitanya ATLURU, James Thomas TRIPLETT, Chun Chi WAN
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Patent number: 9943519Abstract: Compounds of Formulae Ia, and stereoisomers, geometric isomers, tautomers, solvates, metabolites and pharmaceutically acceptable salts thereof, are useful for inhibiting lipid kinases including PI3K, and for treating disorders such as cancer mediated by lipid kinases. Methods of using compounds of Formula Ia for in vitro, in situ, and in vivo diagnosis, prevention or treatment of such disorders in mammalian cells, or associated pathological conditions, are disclosed.Type: GrantFiled: June 26, 2014Date of Patent: April 17, 2018Assignees: Genentech, Inc., F. Hoffmann-La Roche AGInventors: Adrian Folkes, Stephen Shuttleworth, Irina Chuckowree, Sally Oxenford, Nan Chi Wan, Georgette Castanedo, Richard Goldsmith, Janet Gunzer-Toste, Tim Heffron, Simon Mathieu, Alan Olivero, Daniel P. Sutherlin, Bing-Yan Zhu
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Patent number: 9940881Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light into second light. The light conversion layer can include quantum dots or phosphor materials. Modulation drive signals are generated to determine transmission of the second light through individual subpixels of the display. These modulation drive signals can be adjusted based on one or more light field simulations. The light field simulations can include: (i) a color shift for a pixel based on a point spread function of the illumination sources; (ii) binning difference of individual illumination sources; (iii) temperature dependence of display components on performance; or (iv) combinations thereof.Type: GrantFiled: February 13, 2014Date of Patent: April 10, 2018Assignee: Dolby Laboratories Licensing CorporationInventors: Ajit Ninan, Chun Chi Wan
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Patent number: 9927568Abstract: An apparatus comprising a light source (110), one or more light guides (104), and a light diffuser (102) having an integration chamber (114) surrounded by one or more light diffusive areas (108). The one or more light diffusive areas are configured with one or more first openings as one or more ingress areas (112) to receive light from the light source and one or more second openings as one or more egress areas (106) to provide light to the one or more light guides. For illuminating visual indicators with uniform light.Type: GrantFiled: November 12, 2014Date of Patent: March 27, 2018Assignee: Dolby Laboratories Licensing CorporationInventors: Ajit Ninan, Chun Chi Wan
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Publication number: 20180068637Abstract: An input media signal encoded with a portion of image data to be rendered with a target display device is received. It is determined, based on the portion of image data, whether a first power profile is to be applied to rendering the portion of image data with the target display device. In response to determining, based on the portion of image data, that the first power profile is not to be applied to rendering the portion of image data with the target display device, a second power profile is applied to rendering the portion of image data with the target display device.Type: ApplicationFiled: March 22, 2016Publication date: March 8, 2018Applicant: Dolby Laboratories Licensing CorporationInventors: Ajit NINAN, Chun Chi WAN
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Publication number: 20180031921Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.Type: ApplicationFiled: October 5, 2017Publication date: February 1, 2018Applicant: Dolby Laboratories Licensing CorporationInventors: Chun Chi WAN, Ajit NINAN
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Publication number: 20170352330Abstract: Techniques for optimizing light output profiles in display systems are described. A light output profile is defined in relation to a plurality of sample locations on an illuminated surface. Point spread functions that satisfy illumination performance values specified in the light output profile in aggregate are computed or derived. A design process that adds or removes optical components to a display light assembly derives an optimal design of a light illumination layer for display systems. Relationships and parameter values determined in the design process may be configured into display systems along with the optical components for the purpose of generating optimized light output profiles in the display systems.Type: ApplicationFiled: August 22, 2017Publication date: December 7, 2017Applicant: Dolby Laboratories Licensing CorporationInventors: Henry Hang-Kei Ip, Chun Chi Wan, Ka Wing Terence Lau
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Patent number: 9826226Abstract: An image sensor of a camera configured with a diffraction grating is used to capture a diffraction image of an image rendering surface of a display device, for example, while a target image is being rendered on the image rendering surface of the display device. The diffraction image of the image rendering surface of the display device is analyzed to obtain measurements of native display capabilities of the display device. Display capability data is transmitted to a display management module for the display device. At least a portion of the display capability data is generated from the measurements of native display capabilities of the display device that are obtained from analyzing the diffraction image of the image rendering surface of the display device.Type: GrantFiled: January 14, 2016Date of Patent: November 21, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Timo Kunkel, Chun Chi Wan
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Patent number: 9810944Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.Type: GrantFiled: August 20, 2015Date of Patent: November 7, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Chun Chi Wan, Ajit Ninan
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Publication number: 20170248745Abstract: A display system comprises light sources configured to emit first light with a first spectral power distribution; light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to primary colors and (b) secondary spectral components that do not correspond to the primary colors; and notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light. The portion of the second light can be directed to a viewer of the display system and configured to render images viewable to the viewer.Type: ApplicationFiled: May 16, 2017Publication date: August 31, 2017Inventors: Ajit Ninan, Chun Chi Wan, Timo Kunkel, Michael E. Miller
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Patent number: 9747866Abstract: Techniques for optimizing light output profiles in display systems are described. A light output profile is defined in relation to a plurality of sample locations on an illuminated surface. Point spread functions that satisfy illumination performance values specified in the light output profile in aggregate are computed or derived. A design process that adds or removes optical components to a display light assembly derives an optimal design of a light illumination layer for display systems. Relationships and parameter values determined in the design process may be configured into display systems along with the optical components for the purpose of generating optimized light output profiles in the display systems.Type: GrantFiled: November 15, 2012Date of Patent: August 29, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Henry Hang-Kei Ip, Chun Chi Wan, Ka Wing Terence Lau
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Patent number: 9746157Abstract: A display system comprises light sources configured to emit first light with a first spectral power distribution; light regeneration layers configured to be stimulated by the first light and to convert at least a portion of the first light and recycled light into second light, the second light comprising (a) primary spectral components that correspond to primary colors and (b) secondary spectral components that do not correspond to the primary colors; and notch filter layers configured to receive a portion of the second light and to filter out the secondary spectral components from the portion of the second light. The portion of the second light can be directed to a viewer of the display system and configured to render images viewable to the viewer.Type: GrantFiled: September 18, 2013Date of Patent: August 29, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Ajit Ninan, Chun Chi Wan, Timo Kunkel, Michael Eugene Miller
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Publication number: 20170242301Abstract: Techniques for driving a dual modulation display include generating backlight drive signals to drive individually-controllable illumination sources. The illumination sources emit first light onto a light conversion layer. The light conversion layer converts the first light, such as blue or ultraviolet light, into second light, such as white light. The light conversion layer can include quantum dot materials. Liquid crystal display (LCD) modulation drive signals are generated to determine transmission of the second light through individual color subpixels of the display. These LCD modulation drive signals can be adjusted based on one or more light field simulations to account for non-uniform, spatial color shifts. Alternatively, one or more light field simulations based on a uniformity assumption determine intermediate LCD modulation drive signals. A compensation field simulation, using backlight drive signals, is then used to adjust the intermediate LCD modulation drive signal for color correction.Type: ApplicationFiled: August 20, 2015Publication date: August 24, 2017Applicant: Dolby Laboratories Licensing CorporationInventors: Chun Chi WAN, Ajit NINAN
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Patent number: 9692946Abstract: In one embodiment the present invention includes a display system for displaying video. The display system includes a backlight layer and an LCD layer. The display system controls the backlight layer and the LCD layer to emulate a cathode ray tube response. This emulation may be accomplished by applying a gamma function to a gamma corrected input signal. In this manner, the effects resulting from the “crushed blacks” phenomenon may be reduced.Type: GrantFiled: June 28, 2010Date of Patent: June 27, 2017Assignee: Dolby Laboratories Licensing CorporationInventors: Trevor Davies, Giorgio Giaretta, Saagar Patel, Jared Smith, Chun Chi Wan, Christopher Orlick
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Patent number: 9683104Abstract: Provided is a surface modification method of calcite powder prepared from desulfurized gypsum and heat-treated at a high temperature. According to the surface modification method, hydrophilic calcite powder having polarity may be changed into hydrophobic non-polar calcite powder by safely adsorbing a surface modifier onto a surface of the calcite powder and coating the surface with non-polar fatty acid. Particularly, in the case in which calcite powder heat-treated at a high temperature is hydrophobized, a significantly excellent hydrophobic surface property may be implemented.Type: GrantFiled: April 29, 2013Date of Patent: June 20, 2017Assignee: KOREA INSTITUTE OF GEOSCIENCES AND MINERAL RESOURCES (KIGAM)Inventors: Chi Wan Jeon, Young Nam Jang, Soo Chun Chae, Seung Woo Lee, Jun Hwan Bang, Kyung Sun Song
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Publication number: 20170162107Abstract: A first and a second light valve control values are derived for a first and a second frames, respectively, in a specific region of a display panel based on image data of the first and second frames. It is determined whether a difference between the first and second light valve control values exceeds a light valve control threshold. If so, a light source driving waveform is constructed to comprise a sequence of light source control pulses for controlling one or more light sources designated to illuminate the specific region of the display panel. The sequence of light source control pulses is constrained to start at a start time plus a transition time interval. The transition time interval allows light valves in the specific region of the display panel to complete a transition between the first and second light valve control values.Type: ApplicationFiled: December 1, 2016Publication date: June 8, 2017Applicant: Dolby Laboratories Licensing CorporationInventors: Ajit NINAN, Chun Chi WAN