Patents by Inventor Hossein Nemati
Hossein Nemati 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).
-
Publication number: 20210191233Abstract: A light source module includes an illumination element and an adjustable light diffusing material. The light source module is configured to receive or generate a control signal for adjusting diffusion of light emitted from the light source module and accordingly adjust an amount of diffusion of light emitted from the light source module. In some embodiments, an adjustable light diffusing material includes a polymer stabilized cholesteric texture (PSCT), a smectic phase liquid crystal, a polymer network liquid crystal (PNLC), or other suitable material. A controller for a light source module may determine a level of diffusion based on a level of inclusion of a wide-angle field of view of a wide-angle lens system or a telephoto field of view of a telephoto lens system in a composite camera field of view that includes a combination of the wide angle field of view and the telephoto field of view.Type: ApplicationFiled: March 5, 2021Publication date: June 24, 2021Applicant: Apple Inc.Inventors: Blake M. Coughenour, Hossein Nemati, Florian R. Fournier
-
Patent number: 10942423Abstract: A light source module includes an illumination element and an adjustable light diffusing material. The light source module is configured to receive or generate a control signal for adjusting diffusion of light emitted from the light source module and accordingly adjust an amount of diffusion of light emitted from the light source module. In some embodiments, an adjustable light diffusing material includes a polymer stabilized cholesteric texture (PSCT), a smectic phase liquid crystal, a polymer network liquid crystal (PNLC), or other suitable material. A controller for a light source module may determine a level of diffusion based on a level of inclusion of a wide-angle field of view of a wide-angle lens system or a telephoto field of view of a telephoto lens system in a composite camera field of view that includes a combination of the wide angle field of view and the telephoto field of view.Type: GrantFiled: May 31, 2018Date of Patent: March 9, 2021Assignee: Apple Inc.Inventors: Blake M. Coughenour, Hossein Nemati, Florian R. Fournier
-
Patent number: 10725228Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The display may be operated in at least a normal viewing mode, a privacy mode, an outdoor viewing mode, and a power saving mode. The different view modes may exhibit different viewing angles. In one configuration, the display may include a backlight unit that generates a collimated light source and that includes a switchable diffuser film for selectively scattering the collimated light source depending on the current viewing mode of the display. In another configuration, the display may include a backlight unit that generates a scattered light source that includes a switchable microarray structure such as a switchable mirror structure or a tunable microlens array for selectively collimating the scattered light source depending on the current viewing mode.Type: GrantFiled: February 20, 2019Date of Patent: July 28, 2020Assignee: Apple Inc.Inventors: Hyungryul J. Choi, Zhibing Ge, Cheng Chen, Hossein Nemati, Wei Chen, Jun Qi, Khadijeh Bayat, David A. Doyle, John Z. Zhong
-
Patent number: 10690970Abstract: A liquid crystal display may have main column spacers and subspacer column spacers. The column spacers may have cross shapes formed from overlapping perpendicular rectangular column spacer portions respectively located on a color filter layer and a thin-film transistor layer. The column spacers may have a hybrid configuration in which some of the rectangular portions on the thin-film transistor layer extend vertically and some extend horizontally. Column spacers may be formed from planarization layer material, may be formed from locally thickened portions of a planarization layer, and may have circular shapes.Type: GrantFiled: September 8, 2016Date of Patent: June 23, 2020Assignee: Apple Inc.Inventors: Chia Hsuan Tai, Cheng Chen, Da Yu, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang, Tae Woon Cha, Yeon Sik Ham, Yuan Chen, Zhibing Ge, Hossein Nemati
-
Patent number: 10409118Abstract: An electronic device may have a housing and a display in the housing. The display may have one or more curved edges such as curved edges associated with rounded corners in the display and housing. The display may have an array of pixels. The display may include full-strength pixels and may have a band of antialiasing pixels having selectively reduced strengths to visually smooth content displayed along the curved edges. The pixels may be organic light-emitting diode pixels, liquid crystal display pixels, or other display pixels. Organic light-emitting diode pixels may have drive transistors and associated organic light-emitting diodes. Selectively elevated series or opaque light blocking structures of selectively reduced areas may be used to selectively reduce the strength of the antialiasing pixels. Liquid crystal display pixels may include electrodes of different shapes and/or opaque layer openings of different sizes to form antialiasing pixels in desired patterns.Type: GrantFiled: April 26, 2017Date of Patent: September 10, 2019Assignee: Apple Inc.Inventors: Pei-En Chang, Szu-Hsien Lee, Hsin-Ying Chiu, Chun-Yao Huang, Kyung Wook Kim, Shih Chang Chang, Hossein Nemati
-
Publication number: 20190179074Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The display may be operated in at least a normal viewing mode, a privacy mode, an outdoor viewing mode, and a power saving mode. The different view modes may exhibit different viewing angles. In one configuration, the display may include a backlight unit that generates a collimated light source and that includes a switchable diffuser film for selectively scattering the collimated light source depending on the current viewing mode of the display. In another configuration, the display may include a backlight unit that generates a scattered light source that includes a switchable microarray structure such as a switchable mirror structure or a tunable microlens array for selectively collimating the scattered light source depending on the current viewing mode.Type: ApplicationFiled: February 20, 2019Publication date: June 13, 2019Inventors: Hyungryul J. Choi, Zhibing Ge, Cheng Chen, Hossein Nemati, Wei Chen, Jun Qi, Khadijeh Bayat, David A. Doyle, John Z. Zhong
-
Patent number: 10303013Abstract: An electronic device may have a housing and a display in the housing. The display may have one or more curved edges such as curved edges associated with rounded corners in the display and housing. The display may have an array of pixels. The display may include full-strength pixels and may have a band of antialiasing pixels having selectively reduced strengths to visually smooth content displayed along the curved edges. The antialiasing pixels may include single-opening pixels that each have a single opaque masking layer opening and may include dual-opening pixels that each include a pair of opaque masking layer openings. The single-opening pixels may be stronger than the dual-opening pixels.Type: GrantFiled: April 30, 2018Date of Patent: May 28, 2019Assignee: Apple Inc.Inventors: Hossein Nemati, Pei-En Chang, Yuan Chen, Tae Woon Cha, Sung H. Kim, Chia Hsuan Tai
-
Patent number: 10281630Abstract: A display may include an optical film to promote sunglass-friendly viewing of the display. Displays may include linear polarizers. For example, a liquid crystal display may have a linear polarizer above a liquid crystal layer, whereas an organic light-emitting diode display may have a linear polarizer that forms a portion of a circular polarizer to reduce reflections in the display. Displays that emit linearly polarized light may not be compatible with polarized sunglasses. To ensure an optimal user experience for users wearing sunglasses, displays may include sunglass-friendly optical films. A sunglass-friendly optical film may be a film formed from a birefringent material such as a polymer or liquid crystal. The sunglass-friendly optical film may have an optical axis that is at a 45° angle relative to the optical axis of the underlying linear polarizer. The sunglass-friendly optical film may be patterned to have reduced thickness regions.Type: GrantFiled: November 14, 2016Date of Patent: May 7, 2019Assignee: Apple Inc.Inventors: Yuan Chen, Hossein Nemati, Chia Hsuan Tai, Jin Yan, Young Cheol Yang, Zhibing Ge
-
Patent number: 10247982Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The display may be operated in at least a normal viewing mode, a privacy mode, an outdoor viewing mode, and a power saving mode. The different view modes may exhibit different viewing angles. In one configuration, the display may include a backlight unit that generates a collimated light source and that includes a switchable diffuser film for selectively scattering the collimated light source depending on the current viewing mode of the display. In another configuration, the display may include a backlight unit that generates a scattered light source that includes a switchable microarray structure such as a switchable mirror structure or a tunable microlens array for selectively collimating the scattered light source depending on the current viewing mode.Type: GrantFiled: February 23, 2016Date of Patent: April 2, 2019Assignee: Apple Inc.Inventors: Hyungryul J. Choi, Zhibing Ge, Cheng Chen, Hossein Nemati, Wei Chen, Jun Qi, Khadijeh Bayat, David A. Doyle, John Z. Zhong
-
Patent number: 10175525Abstract: A polarizing waveguide plate includes a pair of spaced transparent plates that define a gap therebetween. Disposed within the gap is a composite material formed of a mixture of polymer mater and liquid crystal material. Positioned proximate to one edge of the gap is an edge light, while a reflector/converter is positioned proximate to another edge of the gap. During operation, unpolarized light is emitted from the edge light and is received within the gap. As such, a portion of the light polarized in a first direction is permitted to exit the waveguide, while the remaining portion of the light that is polarized in a second direction, orthogonal to the first direction, is converted by the converter/reflector so that its polarization is also in the first direction. As such, substantially all of the unpolarized light from the edge light is emitted by the polarizing waveguide plate as polarized light.Type: GrantFiled: June 12, 2015Date of Patent: January 8, 2019Assignee: The University of AkronInventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati
-
Publication number: 20180246363Abstract: An electronic device may have a housing and a display in the housing. The display may have one or more curved edges such as curved edges associated with rounded corners in the display and housing. The display may have an array of pixels. The display may include full-strength pixels and may have a band of antialiasing pixels having selectively reduced strengths to visually smooth content displayed along the curved edges. The antialiasing pixels may include single-opening pixels that each have a single opaque masking layer opening and may include dual-opening pixels that each include a pair of opaque masking layer openings. The single-opening pixels may be stronger than the dual-opening pixels.Type: ApplicationFiled: April 30, 2018Publication date: August 30, 2018Inventors: Hossein Nemati, Pei-En Chang, Yuan Chen, Tae Woon Cha, Sung H. Kim, Chia Hsuan Tai
-
Publication number: 20180081223Abstract: A display may include an optical film to promote sunglass-friendly viewing of the display. Displays may include linear polarizers. For example, a liquid crystal display may have a linear polarizer above a liquid crystal layer, whereas an organic light-emitting diode display may have a linear polarizer that forms a portion of a circular polarizer to reduce reflections in the display. Displays that emit linearly polarized light may not be compatible with polarized sunglasses. To ensure an optimal user experience for users wearing sunglasses, displays may include sunglass-friendly optical films. A sunglass-friendly optical film may be a film formed from a birefringent material such as a polymer or liquid crystal. The sunglass-friendly optical film may have an optical axis that is at a 45° angle relative to the optical axis of the underlying linear polarizer. The sunglass-friendly optical film may be patterned to have reduced thickness regions.Type: ApplicationFiled: November 14, 2016Publication date: March 22, 2018Inventors: Yuan Chen, Hossein Nemati, Chia Hsuan Tai, Jin Yan, Young Cheol Yang, Zhibing Ge
-
Patent number: 9798199Abstract: A layer of liquid crystal material may be interposed between display layers. The display layers may include thin-film transistor circuitry having subpixel electrodes for applying electric fields to subpixel portions of the layer of liquid crystal material. Subpixels of different colors may have different shapes and may have different liquid crystal layer thicknesses. These subpixel differences may be configured to slow the switching speed of subpixels of a certain color relative to other subpixels to reduce color motion blur when an object is moved across a black or colored background. The subpixels may have chevron shapes. Subpixels of a first color may have chevron shapes that are less bent than subpixels of second and third colors. In configurations with varying liquid crystal layer thicknesses, the subpixels of the first color may have thicker liquid crystal layers than the subpixels of the second and third colors.Type: GrantFiled: September 10, 2015Date of Patent: October 24, 2017Assignee: Apple Inc.Inventors: Yuan Chen, Zhibing Ge, Adria Fores Herranz, Chia Hsuan Tai, Hossein Nemati, Jun Jiang, Cheng Chen
-
Publication number: 20170293174Abstract: A liquid crystal display may have main column spacers and subspacer column spacers. The column spacers may have cross shapes formed from overlapping perpendicular rectangular column spacer portions respectively located on a color filter layer and a thin-film transistor layer. The column spacers may have a hybrid configuration in which some of the rectangular portions on the thin-film transistor layer extend vertically and some extend horizontally. Column spacers may be formed from planarization layer material, may be formed from locally thickened portions of a planarization layer, and may have circular shapes.Type: ApplicationFiled: September 8, 2016Publication date: October 12, 2017Inventors: Chia Hsuan Tai, Cheng Chen, Da Yu, Enkhamgalan Dorjgotov, Sang Un Choi, Shih-Chyuan Fan Jiang, Tae Woon Cha, Yeon Sik Ham, Yuan Chen, Zhibing Ge, Hossein Nemati
-
Patent number: 9703151Abstract: A layer of liquid crystal material may be interposed between display layers. The display layers may include thin-film transistor circuitry having subpixel electrodes for applying electric fields to subpixel portions of the layer of liquid crystal material. Subpixels of different colors may have different shapes and may have different liquid crystal layer thicknesses. These subpixel differences may be configured to slow the switching speed of subpixels of a certain color relative to other subpixels to reduce color motion blur when an object is moved across a black or colored background. The subpixels may have chevron shapes. Subpixels of a first color may have chevron shapes that are less bent than subpixels of second and third colors. In configurations with varying liquid crystal layer thicknesses, the subpixels of the first color may have thicker liquid crystal layers than the subpixels of the second and third colors.Type: GrantFiled: November 20, 2015Date of Patent: July 11, 2017Assignee: Apple Inc.Inventors: Yuan Chen, Zhibing Ge, Adria Fores Herranz, Chia Hsuan Tai, Hossein Nemati, Jun Jiang, Cheng Chen
-
Publication number: 20160356943Abstract: An electronic device may generate content that is to be displayed on a display. The display may have an array of liquid crystal display pixels for displaying image frames of the content. The display may be operated in at least a normal viewing mode, a privacy mode, an outdoor viewing mode, and a power saving mode. The different view modes may exhibit different viewing angles. In one configuration, the display may include a backlight unit that generates a collimated light source and that includes a switchable diffuser film for selectively scattering the collimated light source depending on the current viewing mode of the display. In another configuration, the display may include a backlight unit that generates a scattered light source that includes a switchable microarray structure such as a switchable mirror structure or a tunable microlens array for selectively collimating the scattered light source depending on the current viewing mode.Type: ApplicationFiled: February 23, 2016Publication date: December 8, 2016Inventors: Hyungryul J. Choi, Zhibing Ge, Cheng Chen, Hossein Nemati, Wei Chen, Jun Qi, Khadijeh Bayat, David A. Doyle, John Z. Zhong
-
Publication number: 20160259218Abstract: A layer of liquid crystal material may be interposed between display layers. The display layers may include thin-film transistor circuitry having subpixel electrodes for applying electric fields to subpixel portions of the layer of liquid crystal material. Subpixels of different colors may have different shapes and may have different liquid crystal layer thicknesses. These subpixel differences may be configured to slow the switching speed of subpixels of a certain color relative to other subpixels to reduce color motion blur when an object is moved across a black or colored background. The subpixels may have chevron shapes. Subpixels of a first color may have chevron shapes that are less bent than subpixels of second and third colors. In configurations with varying liquid crystal layer thicknesses, the subpixels of the first color may have thicker liquid crystal layers than the subpixels of the second and third colors.Type: ApplicationFiled: November 20, 2015Publication date: September 8, 2016Inventors: Yuan Chen, Zhibing Ge, Adria Fores Herranz, Chia Hsuan Tai, Hossein Nemati, Jun Jiang, Cheng Chen
-
Publication number: 20160259215Abstract: A layer of liquid crystal material may be interposed between display layers. The display layers may include thin-film transistor circuitry having subpixel electrodes for applying electric fields to subpixel portions of the layer of liquid crystal material. Subpixels of different colors may have different shapes and may have different liquid crystal layer thicknesses. These subpixel differences may be configured to slow the switching speed of subpixels of a certain color relative to other subpixels to reduce color motion blur when an object is moved across a black or colored background. The subpixels may have chevron shapes. Subpixels of a first color may have chevron shapes that are less bent than subpixels of second and third colors. In configurations with varying liquid crystal layer thicknesses, the subpixels of the first color may have thicker liquid crystal layers than the subpixels of the second and third colors.Type: ApplicationFiled: September 10, 2015Publication date: September 8, 2016Inventors: Yuan Chen, Zhibing Ge, Adria Fores Herranz, Chia Hsuan Tai, Hossein Nemati, Jun Jiang, Cheng Chen
-
Publication number: 20150362649Abstract: A polarizing waveguide plate includes a pair of spaced transparent plates that define a gap therebetween. Disposed within the gap is a composite material formed of a mixture of polymer mater and liquid crystal material. Positioned proximate to one edge of the gap is an edge light, while a reflector/converter is positioned proximate to another edge of the gap. During operation, unpolarized light is emitted from the edge light and is received within the gap. As such, a portion of the light polarized in a first direction is permitted to exit the waveguide, while the remaining portion of the light that is polarized in a second direction, orthogonal to the first direction, is converted by the converter/reflector so that its polarization is also in the first direction. As such, substantially all of the unpolarized light from the edge light is emitted by the polarizing waveguide plate as polarized light.Type: ApplicationFiled: June 12, 2015Publication date: December 17, 2015Inventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati