Patents by Inventor Mehdi Aas
Mehdi Aas 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: 11940144Abstract: A luminaire can include a curved light guide plate including a first receiving surface, an emitting surface, a major surface opposing the emitting surface, second and third receiving surfaces, the first receiving surface extending in a first dimension between the major surface and the emitting surface and extending in a second dimension between the second and third receiving surfaces, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) and the second and third receiving surfaces generally planar, and a plurality of LEDs positioned to emit light into one or more of the first: receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.Type: GrantFiled: May 22, 2023Date of Patent: March 26, 2024Assignee: Lumileds LLCInventors: Frederic Stephane Diana, Mehdi Aas, Charles André Schrama
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Publication number: 20230313969Abstract: A luminaire can include a curved light guide plate including a first receiving surface, an emitting surface, a major surface opposing the emitting surface, second and third receiving surfaces, the first receiving surface extending in a first dimension between the major surface and the emitting surface and extending in a second dimension between the second and third receiving surfaces, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) and the second and third receiving surfaces generally planar, and a plurality of LEDs positioned to emit light into one or more of the first: receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.Type: ApplicationFiled: May 22, 2023Publication date: October 5, 2023Inventors: Frederic Stephane Diana, Mehdi Aas, Charles André Schrama
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Patent number: 11754255Abstract: A luminaire can include a curved light guide plate including a first receiving surface, an emitting surface, a major surface opposing the emitting surface, second and third receiving surfaces, the first receiving surface extending in a first dimension between the major surface and the emitting surface and extending in a second dimension between the second and third receiving surfaces, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) and the second and third receiving surfaces generally planar, and a plurality of LEDs positioned to emit light into one or more of the first receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.Type: GrantFiled: December 14, 2020Date of Patent: September 12, 2023Assignee: Lumileds LLCInventors: Frederic Stephane Diana, Mehdi Aas, Charles André Schrama
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Publication number: 20230187471Abstract: The output spectrum of a light emitting device comprising LEDs and/or pcLEDs is tunable by controlling emission from an activating LED to activate absorption by a photochromic material in the light output optical path of the device, or to induce emission from a wavelength converting material not otherwise active during operation of the light emitting device, or to activate absorption by a photochromic material in the light output optical path of the device and to induce emission from a wavelength converting material not otherwise active during operation of the light emitting device.Type: ApplicationFiled: November 22, 2022Publication date: June 15, 2023Applicant: LUMILEDS LLCInventors: Varun Dev KAKKAR, Mehdi Aas
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Publication number: 20230187590Abstract: Phosphor converted LEDs (pcLEDs) are color tuned by temporal saturation of an electronic transition from which the phosphor emission arises. A single such pcLED is individually color tunable. In an array of such pcLEDs each pixel may be separately color tunable.Type: ApplicationFiled: November 18, 2022Publication date: June 15, 2023Applicant: LUMILEDS LLCInventor: Mehdi Aas
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Patent number: 11629842Abstract: An apparatus can include a lens that can shape light emerging from a light emitting diode (LED). The emergent light from the LED can be substantially centered around an LED axis. An incident surface of the lens can be positioned to face the LED. The incident surface can include a concave portion. The concave portion can be substantially smooth, so as not to substantially scatter light that strikes the concave portion. The concave portion can be substantially centered around a concave portion axis that is non-coaxial with the LED axis. The incident surface can include a scattering portion, positioned away from the concave portion, which can be textured so as to scatter light that strikes the scattering portion. An exiting surface of the lens can optionally include a generally planar portion that at least partially surrounds a substantially smooth convex portion.Type: GrantFiled: November 18, 2021Date of Patent: April 18, 2023Assignee: Lumileds LLCInventors: Mehdi Aas, Charles André Schrama
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Patent number: 11619829Abstract: An autostereoscopic 3D display assembly includes pixels configured to generate a first image intended for a user's left eye, and a second image intended for a user's right eye. Each of the images is projected with a respective line pattern, where the bright portions of the left eye line pattern alternate with the bright portions of the right eye line pattern. The left eye and right eye line patterns are formed using a grating or a double grating. In one embodiment, right eye pixels and left eye pixels each include a double grating, with a different offset between the first grating and second grating to generate the different line patterns. In another embodiment, right eye pixels and left eye pixels each include a grating and one or more micro-LEDs, with a different offset between the grating and the micro-LEDs to generate the different line patterns.Type: GrantFiled: December 10, 2020Date of Patent: April 4, 2023Assignee: Lumileds LLCInventors: Mehdi Aas, Rob Jacques Paul Engelen
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Patent number: 11417796Abstract: A light-emitting apparatus can include a reflective cavity that can reflect visible light within the reflective cavity. The reflective cavity can allow the reflected visible light to exit the reflective cavity only at one or more specified emission locations. A visible light-emitting diode can emit visible light into the reflective cavity. An infrared light-emitting diode can emit infrared light into the reflective cavity. A lens can angularly redirect infrared light and visible light that exit the cavity through the one or more emission locations. The reflective cavity can be formed by surfaces at least partially coated with a coating that is reflective for visible light. The coated surfaces can include a circuit board that supports the light-emitting diodes, an incident surface of the lens, and an extension portion of the lens that extends from a flange to the incident surface of the lens.Type: GrantFiled: December 3, 2019Date of Patent: August 16, 2022Assignee: Lumileds LLCInventors: Mehdi Aas, Erno Fancsali, Frans Hubert Konijn, Arjen Gerben Van der Sijde, Nicola Bettina Pfeffer
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Publication number: 20220187612Abstract: An autostereoscopic 3D display assembly includes pixels configured to generate a first image intended for a user's left eye, and a second image intended for a user's right eye. Each of the images is projected with a respective line pattern, where the bright portions of the left eye line pattern alternate with the bright portions of the right eye line pattern. The left eye and right eye line patterns are formed using a grating or a double grating. In one embodiment, right eye pixels and left eye pixels each include a double grating, with a different offset between the first grating and second grating to generate the different line patterns. In another embodiment, right eye pixels and left eye pixels each include a grating and one or more micro-LEDs, with a different offset between the grating and the micro-LEDs to generate the different line patterns.Type: ApplicationFiled: December 10, 2020Publication date: June 16, 2022Applicant: Lumileds LLCInventors: Mehdi Aas, Rob Jacques Paul Engelen
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Patent number: 11294239Abstract: A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.Type: GrantFiled: March 30, 2021Date of Patent: April 5, 2022Assignee: Lumileds LLCInventors: Mehdi Aas, Nicola Bettina Pfeffer, Arjen Gerben Van der Sijde, Erno Fancsali
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Publication number: 20220074571Abstract: An apparatus can include a lens that can shape light emerging from a light emitting diode (LED). The emergent light from the LED can be substantially centered around an LED axis. An incident surface of the lens can be positioned to face the LED. The incident surface can include a concave portion. The concave portion can be substantially smooth, so as not to substantially scatter light that strikes the concave portion. The concave portion can be substantially centered around a concave portion axis that is non-coaxial with the LED axis. The incident surface can include a scattering portion, positioned away from the concave portion, which can be textured so as to scatter light that strikes the scattering portion. An exiting surface of the lens can optionally include a generally planar portion that at least partially surrounds a substantially smooth convex portion.Type: ApplicationFiled: November 18, 2021Publication date: March 10, 2022Inventors: Mehdi Aas, Charles André Schrama
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Patent number: 11209147Abstract: An apparatus can include a lens that can shape light emerging from a light emitting diode (LED). The emergent light from the LED can be substantially centered around an LED axis. An incident surface of the lens can be positioned to face the LED. The incident surface can include a concave portion. The concave portion can be substantially smooth, so as not to substantially scatter light that strikes the concave portion. The concave portion can be substantially centered around a concave portion axis that is non-coaxial with the LED axis. The incident surface can include a scattering portion, positioned away from the concave portion, which can be textured so as to scatter light that strikes the scattering portion. An exiting surface of the lens can optionally include a generally planar portion that at least partially surrounds a substantially smooth convex portion.Type: GrantFiled: April 27, 2020Date of Patent: December 28, 2021Assignee: Lumileds LLCInventors: Mehdi Aas, Charles André Schrama
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Publication number: 20210325712Abstract: A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.Type: ApplicationFiled: March 30, 2021Publication date: October 21, 2021Inventors: Mehdi Aas, Nicola Bettina Pfeffer, Arjen Gerben Van der Sijde, Erno Fancsali
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Patent number: 11073653Abstract: A backlight apparatus can include a lens to receive light and generate light with a collimated batwing configuration. The lens can include a receiving surface and an opposing transmission surface. The lens can be symmetric about a plane of symmetry. The transmission surface can include an angle of curvature that increases closer to the plane of symmetry.Type: GrantFiled: December 19, 2019Date of Patent: July 27, 2021Assignee: Lumileds LLCInventors: Mehdi Aas, Arjen Gerben Van der Sijde, Erno Fancsali, Nicola Bettina Pfeffer
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Publication number: 20210191005Abstract: A light-emitting apparatus can shape infrared light. The light-emitting apparatus can include a reflective element including a reflective cavity configured to reflect infrared light incident thereon away from the infrared light-emitting diode, whereby the infrared light-emitting diode extends into the reflective cavity and is configured to emit infrared light into the reflective cavity. The light-emitting apparatus further includes a diffuser to receive infrared light directly from the infrared light-emitting diode and from the reflective element, whereby the diffuser is configured to shape the received infrared light.Type: ApplicationFiled: December 19, 2019Publication date: June 24, 2021Inventors: Erno Fancsali, Mehdi Aas
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Publication number: 20210191033Abstract: A backlight apparatus can include a lens to receive light and generate light with a collimated batwing configuration. The lens can include a receiving surface and an opposing transmission surface. The lens can be symmetric about a plane of symmetry. The transmission surface can include an angle of curvature that increases closer to the plane of symmetry.Type: ApplicationFiled: December 19, 2019Publication date: June 24, 2021Inventors: Mehdi Aas, Arjen Gerben Van der Sijde, Erno Fancsali, Nicola Bettina Pfeffer
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Publication number: 20210190293Abstract: A luminaire can include a curved light guide plate including a first receiving surface, an emitting surface, a major surface opposing the emitting surface, second and third receiving surfaces, the first receiving surface extending in a first dimension between the major surface and the emitting surface and extending in a second dimension between the second and third receiving surfaces, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) and the second and third receiving surfaces generally planar, and a plurality of LEDs positioned to emit light into one or more of the first receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.Type: ApplicationFiled: December 14, 2020Publication date: June 24, 2021Inventors: Frederic Stephane Diana, Mehdi Aas, Charles André Schrama
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Publication number: 20210181521Abstract: A near field line pattern generator includes a double grating and at least one light emitting diode (LED). The double grating includes a first grating and a second grating, each having alternating light blocking sections and light transmitting sections. The LED emits light directed at the double grating assembly such that a first portion of light passes through the first grating, and a second portion of the light passed through the first grating passes through the second grating. The light passing through the second grating forms a line pattern at a focal distance from the double grating assembly. The line pattern has alternating bright portions and dark portions. In some aspects, the pitch of the second grating is less than the pitch of the first grating. In some aspects, the near field line pattern generator also includes a convergent lens for focusing the line pattern at the focal distance.Type: ApplicationFiled: December 13, 2019Publication date: June 17, 2021Applicant: Lumileds Holding B.V.Inventors: Charles Schrama, Mehdi Aas
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Patent number: 11029564Abstract: A backlight apparatus can include a light emitting element configured to emit visible light. The backlight apparatus can include a polarizing device including a prism situated to receive the visible light and to polarize the visible light to generate polarized light. The backlight apparatus can include a light guide panel configured to receive the polarized light at an input surface facing the polarizing device and to distribute the polarized light to a major surface of the light guide panel facing a display screen.Type: GrantFiled: December 19, 2019Date of Patent: June 8, 2021Assignee: Lumileds LLCInventors: Mehdi Aas, Nicola Bettina Pfeffer, Arjen Gerben Van der Sijde, Erno Fancsali
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Publication number: 20210167245Abstract: A light-emitting apparatus can include a reflective cavity that can reflect visible light within the reflective cavity. The reflective cavity can allow the reflected visible light to exit the reflective cavity only at one or more specified emission locations. A visible light-emitting diode can emit visible light into the reflective cavity. An infrared light-emitting diode can emit infrared light into the reflective cavity. A lens can angularly redirect infrared light and visible light that exit the cavity through the one or more emission locations. The reflective cavity can be formed by surfaces at least partially coated with a coating that is reflective for visible light. The coated surfaces can include a circuit board that supports the light-emitting diodes, an incident surface of the lens, and an extension portion of the lens that extends from a flange to the incident surface of the lens.Type: ApplicationFiled: December 3, 2019Publication date: June 3, 2021Inventors: Mehdi Aas, Erno Fancsali, Frans Hubert Konijn, Arjen Van der Sijde, Nicola Bettina Pfeffer