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公开(公告)号：US20210239996A1
公开(公告)日：2021-08-05
申请号：US16782856
申请日：2020-02-05
IPC分类号： G02B27/48 , G02F1/137 , G02F1/133 , G02F1/1343 , G02F1/1347
摘要： A speckle reduction system is provided and includes a speckle reduction component and a control module. The speckle reduction component includes electrode layers and a liquid crystal layer. The liquid crystal layer is disposed between the electrode layers and configured to receive light from a coherent light source. The control module is configured to (i) supply a first voltage signal having a first voltage to the electrode layers to provide a first speckle pattern output, and (ii) supply a second voltage signal having a second voltage to the electrode layers to provide a second speckle pattern output, wherein the first voltage and the second voltage are greater than zero. The control module is configured to transition between providing the first voltage signal and the second voltage signal in less than at least one of half an integration time of a human eye or 8 milliseconds.
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公开(公告)号：US20200171476A1
公开(公告)日：2020-06-04
申请号：US16782812
申请日：2020-02-05
摘要： A self-cleaning film system configured for reducing a visibility of a contaminant includes a substrate and a film. The film includes a monolayer defining a plurality of cavities and formed from a first material having a first surface energy, and a plurality of patches disposed within the plurality of cavities. Each of the patches is formed from a photocatalytic material having a second surface energy that is higher than the first. The film has a touchpoint area having a first use frequency, and a second area having a second use frequency that is less than the first. The patches are present in the touchpoint area in a first concentration and are configured to direct the contaminant towards the second area. The patches are present in the second area in a second concentration that is higher than the first and are configured to reduce the visibility of the contaminant.
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公开(公告)号：US20220214480A1
公开(公告)日：2022-07-07
申请号：US17142739
申请日：2021-01-06
发明人： Thomas A. SEDER , Kai-Han CHANG
IPC分类号： G02B5/18 , G02B17/00 , G01N21/41 , G01N33/569 , G01N33/543 , B60R16/023 , B60Q9/00
摘要： Detecting systems configured to detect airborne viruses, and methods of forming the same, are provide. A method for preparing a system for detecting an airborne virus includes preparing a thin-film coating on a surface of a substrate; ablating the coating to form an optical grating structure; and associating a plurality of receptors having an affinity and specificity for the virus with the optical grating structure so that the structure is capable of indicating the presence of the virus. A detecting system includes the optical grating structure and an optical component. The optical component includes a cavity defined by two opposing reflecting surfaces and configured to receive the optical grating structure, and a light source disposed adjacent to an exterior surface of a first reflecting surface. The light source may be configured to direct light towards the first reflecting surface so that light in resonance enters the cavity.
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公开(公告)号：US20220171185A1
公开(公告)日：2022-06-02
申请号：US17106782
申请日：2020-11-30
摘要： A head-up display for a vehicle. The head-up display comprises a picture generating unit configured to project an image onto a glass surface and an optical stack. The optical stack comprises an infrared reflective waveplate and a dual brightness enhancement film. The infrared reflective waveplate transforms an incoming solar light beam from unpolarized light to incoming polarized light having an incoming S-polarization component and an incoming P-polarization component. The dual brightness enhancement film receives the incoming polarized light from the infrared reflective waveplate and eliminates substantially all of the incoming P-polarization component. The dual brightness enhancement film transmits substantially all of the incoming S-polarization component.
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公开(公告)号：US20220342367A1
公开(公告)日：2022-10-27
申请号：US17237815
申请日：2021-04-22
发明人： Thomas A. SEDER , Kai-Han CHANG
摘要： A holographic projection system includes a SLM that receives a light beam and generates a modulated beam projected at an eyebox, where: the modulated beam includes multiple versions of a test image; and the test image includes bright objects and transparent regions, which are selected dark areas of interest for measuring luminance. A control module runs a test to characterize contrast in each of multiple virtual image planes including: controlling the SLM to generate the modulated beam; measuring luminance levels of each of the versions of the test image displayed in the virtual image planes; calculating contrast ratios based on the luminance levels of each of the versions of the test image; determining whether the contrast ratios are within predetermined ranges of predetermined contrast ratios; and adjusting operation of the SLM in response to one of the contrast ratios not being within a corresponding one of the predetermined ranges.
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公开(公告)号：US20220337796A1
公开(公告)日：2022-10-20
申请号：US17231719
申请日：2021-04-15
发明人： Kai-Han CHANG , Thomas A. SEDER
摘要： A system for measuring speckle contrast includes: a head up display (HUD) system configured to output a predetermined image and having a first pixels per degree (PPD); an imaging colorimeter: having a field of view; positioned such that the predetermined image is in the field of view; having a second PPD that is at least 2.2 times greater than the first PPD of the HUD system; and configured to capture an image including the predetermined image; and a speckle contrast module configured to determine a speckle contrast of the HUD system based on the image.
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公开(公告)号：US20220163919A1
公开(公告)日：2022-05-26
申请号：US17101013
申请日：2020-11-23
发明人： Thomas A. SEDER , Kai-Han CHANG
摘要： A spatial light modulator includes a semiconductor substrate and a plurality of micro-mirrors arranged on the semiconductor substrate to modulate light. Each of the micro-mirrors has a center and a perimeter. Each of the micro-mirrors includes a layer of a reflective material arranged on the semiconductor substrate. In in each of the micro-mirrors, the layer of the reflective material extends horizontally from the center towards the perimeter for a predetermined distance and slopes downwards towards the semiconductor substrate after the predetermined distance.
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公开(公告)号：US20220146715A1
公开(公告)日：2022-05-12
申请号：US17094896
申请日：2020-11-11
摘要： A system includes a display. The display includes an array of LEDs covered by a transparent material. The array of LEDs includes a plurality of first, second, third, and fourth LEDs respectively configured to emit red, green, blue, and violet light. The red, green, and blue light from the first, second, and third LEDs is visible to human eye. Violet light from the fourth LEDs is invisible to human eye. The system includes a photocatalytic coating disposed on the transparent material. The photocatalytic coating includes a photo-catalyst responsive to ultraviolet radiation present in sunlight and to the violet light emitted by the fourth LEDs in the array of LEDs. The system includes a controller configured to selectively turn on the fourth LEDs to activate the photo-catalyst in the photocatalytic coating disposed on the transparent material.
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公开(公告)号：US20210209992A1
公开(公告)日：2021-07-08
申请号：US16733952
申请日：2020-01-03
IPC分类号： G09G3/20 , G09G3/3208 , G09G3/32
摘要： A display control system includes: a display including a plurality of pixels; a lookup table including grayscale values and magnitudes of power corresponding to the grayscale values, respectively, where first ones of the grayscale values that are less than a predetermined grayscale value are calibrated based on the display achieving a gamma of greater than 2.2 and second ones of the grayscale values that are greater than the predetermined grayscale value are calibrated based on the display achieving a gamma of 2.2; a driver module configured to: based on a grayscale pixel map including a grayscale value for each pixel of the display, determine magnitudes of power to apply to pixels, respectively, using the lookup table; and apply power to the pixels of the display according to the determined magnitudes of power, respectively.
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10.发明申请公开(公告)号：US20220343876A1
公开(公告)日：2022-10-27
申请号：US17237864
申请日：2021-04-22
发明人： Thomas A. SEDER , Kai-Han CHANG
摘要： A projection system includes a projection device and a control module. The projection device is configured to project (i) a first image in a first virtual image plane, and (ii) a second image in a second virtual image plane, wherein the second virtual image plane is further from an eyebox than the first virtual image plane. The control module is configured to: determine an ambient light luminance level; determine a first luminance level for the first virtual image plane based on the ambient light luminance level; determine a second luminance level of the second virtual image plane based on the first luminance level of the first virtual image plane; and control the at least one projection device to display (i) the first image in the first virtual image plane having the first luminance level, and (ii) the second image in the second virtual image plane having the second luminance level.
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