Abstract: A projection lens includes a first and a second optical lens assembly. The first optical lens assembly is configured to transmit an image beam to the second optical lens assembly, which projects out the image beam from the projection lens. The second optical lens assembly includes a first and a second reflective element, and an optical member disposed between the first and the second reflective element and including a translucent region and a reflective region. The first reflective element is configured to reflect the image beam from the first optical lens assembly and transmit to the translucent region, which allows the image beam from the first reflective element to pass through and transmit to the second reflective element. The second reflective element is configured to reflect the image beam from the translucent region and transmit to the reflective region, which reflects the image beam from the second reflective element.

Abstract: A device includes: a substrate having a semiconductor fin; a stack of semiconductor channels on the substrate and positioned over the fin; a gate structure wrapping around the semiconductor channels; a source/drain abutting the semiconductor channels; an inner spacer positioned between the stack of semiconductor channels and the fin; an undoped semiconductor layer vertically adjacent the source/drain and laterally adjacent the fin; and an isolation structure that laterally surrounds the undoped semiconductor layer, the isolation structure being between the source/drain and the inner spacer.

Abstract: The disclosure provides a viewing angle control module including a first liquid crystal panel, a first polarizer, a second polarizer, and a phase retarder. The first liquid crystal panel includes a first substrate, a second substrate, a first alignment layer, a second alignment layer, a first liquid crystal layer, a first electrode layer, and a second electrode layer. A second alignment direction of the second alignment layer is antiparallel to a first alignment direction of the first alignment layer. The first electrode layer has multiple electrode patterns arranged at intervals along a first direction and extending along a second direction. A first absorption axis of the first polarizer is perpendicular to a second absorption axis of the second polarizer. An included angle between the first absorption axis and the first alignment direction is 45 degrees. A display apparatus including the viewing angle control module is also provided.

Abstract: Provided is a display apparatus including a circuit substrate, a light-emitting layer, a polarizing layer, a quarter waveplate, and a bandpass polarizing reflective layer. The light-emitting layer includes a plurality of first light-emitting structures. The first light-emitting structures have a first peak emission wavelength. The polarizing layer is located on a side of the light-emitting layer away from the circuit substrate. The quarter waveplate is disposed between the polarizing layer and the light-emitting layer and overlaps the light-emitting layer and the polarizing layer. The bandpass polarizing reflective layer is disposed between the quarter waveplate and the light-emitting layer and includes a first bandpass polarizing reflective pattern overlapping the first light-emitting structures. A reflectance of the bandpass polarizing reflective pattern for light with a wavelength in a first wavelength range is greater than 20%. The first wavelength range is the peak emission wavelength ±10 nm.

Abstract: An information handling system keyboard illuminates key values in each of plural keycaps with a backlight located below the plural keys and directed upward through the plural keys and having illumination that adjusts color temperature under management of a controller. A light sensor detects ambient light color temperature and communicates the ambient light color temperature to the controller, which executes instructions in non-transitory memory to adjust the backlight color illumination based on the detected ambient light color temperature to increase color contrast of backlight illumination relative to ambient light and thereby better highlight the key values on the keycap upper surfaces.

Abstract: A projection device includes a light source module, a display panel, a freeform-surface reflective mirror, and a projection lens. The light source module includes a light source, a first Fresnel lens element, and a second Fresnel lens element. The first Fresnel lens element and the second Fresnel lens element are parallel to each other and located between the light source and the display panel. The display panel is arranged between the light source module and the freeform-surface reflective mirror. The projection lens is configured to transmit an image beam out of the projection device, and a direction of an optical axis of the projection lens is different from a direction of a normal of the first Fresnel lens element.

Abstract: Semiconductor devices having improved source/drain features and methods for fabricating such are disclosed herein. An exemplary device includes a semiconductor layer stack disposed over a mesa structure of a substrate. The device further includes a metal gate disposed over the semiconductor layer stack and an inner spacer disposed on the mesa structure of the substrate. The device further includes a first epitaxial source/drain feature and a second epitaxial source/drain feature where the semiconductor layer stack is disposed between the first epitaxial source/drain feature and the second epitaxial source/drain feature. The device further includes a void disposed between the inner spacer and the first epitaxial source/drain feature.

Abstract: An information handling system keyboard illuminates key values in each of plural keycaps with a backlight located below the plural keys and directed upward through the plural keys and having illumination that adjusts color temperature under management of a controller. A light sensor detects ambient light color temperature and communicates the ambient light color temperature to the controller, which executes instructions in non-transitory memory to adjust the backlight color illumination based on the detected ambient light color temperature to increase color contrast of backlight illumination relative to ambient light and thereby better highlight the key values on the keycap upper surfaces.

Abstract: An acoustic metasurface structure is configured to absorb sounds. The acoustic metasurface structure comprises a main body, an externally-connecting configuration and an inner configuration. The externally-connecting configuration and the inner configuration are respectively formed inside the main body. An externally-connecting tube of the externally-connecting configuration is in fluid communication with an external environment and an externally-connecting cavity of the externally-connecting configuration. An inner tube of the inner configuration is in fluid communication with the externally-connecting cavity and an inner cavity of the inner configuration. With the externally-connecting configuration and the inner configuration forming a series-type structure in the main body, the acoustic metasurface structure increases an acoustic impedance.

Abstract: A vehicle display device includes a light source module, a light splitting element, first and second polarization reflection modules. The light source module provides a first light beam having a first polarization state and a second light beam having a second polarization state. The light splitting element reflects the first light beam and allows the second light beam to pass through. The first polarization reflection module reflects the first light beam to the light splitting element and converts the first polarization state into the second polarization state. The second polarization reflection module reflects the first and second light beam and convert the second polarization states into third polarization states. The first and second light beam from the second polarization reflection module form a far-field virtual image and a near-field virtual image through the imaging element.

Abstract: Semiconductor structures and method of forming the same are provided. A semiconductor structure according to the present disclosure includes a contact feature in a dielectric layer, a passivation structure over the dielectric layer, a conductive feature over the passivation structure, a seed layer disposed between the conductive feature and the passivation structure, a protecting layer disposed along sidewalls of the conductive feature, and a passivation layer over the conductive feature and the protecting layer.

Abstract: An optical engine module including a display panel, a transflective layer, a polarizing reflective layer, a first bifocal lens, a first and second electrically controlled half waveplate is provided. The transflective layer is disposed between the display panel and the polarizing reflective layer. The polarizing reflective layer is configured to allow the light beam having a first polarization state to pass through, and reflect the light beam having a second polarization state. The first and second electrically controlled half waveplate are disposed between the transflective layer and the polarizing reflective layer. The first bifocal lens disposed between the first and second electrically controlled half waveplate has a first focal length for the light beam with the first polarization state, and has a second focal length for the light beam with the second polarization state.

Abstract: A projection device including an imaging module, a freeform-surface reflective mirror, and a projection lens assembly is provided. The imaging module is configured to provide imaging beams and includes a display panel and a light-source module. The imaging beams are transmitted toward the projection lens assembly by the freeform-surface reflective mirror. The projection lens assembly includes a first optical axis and a second optical axis. The first optical axis passes through the projection lens assembly. The imaging beams emitted by the projection device form an imaging-beam region, in which the first optical axis does not pass through a geometric center of the imaging-beam region, and the second optical axis passes through a geometric center region of the display panel. The geometric center region is a region having a distance less than or equal to 40% of a minimum width of the display panel from a geometric center of the display panel.

Abstract: A display device, including a circuit substrate, a light-emitting layer, a quarter-wave plate, and a band-pass polarizing layer, is provided. The light-emitting layer is disposed on the circuit substrate and has light-emitting structures, which are electrically connected to the circuit substrate and include first light-emitting structures, which have a first main light-emitting wavelength. The quarter-wave plate is disposed in overlap with the light-emitting structures and is located between the band-pass polarizing layer and the light-emitting layer. The band-pass polarizing layer includes at least one first band-pass polarizing pattern, which have a first absorption axis. The first wavelength range is the first main light-emitting wavelength±10 nm. An average transmittance of the first band-pass polarizing patterns to light with a wavelength outside the first wavelength range and a polarization direction parallel to the first absorption axis is less than 20%.

Abstract: A stereo projection screen including a scattering screen having a scattering structure layer, a phase retardation layer disposed between the scattering structure layer and the polarized projector, and a metal reflection layer covering at least a part of the scattering structure layer is provided. The scattering structure layer and the phase retardation layer are arranged in a first display area and a second display area of the stereo projection screen. The metal reflection layer is arranged in at least one of the first display area and the second display area. A first image light beam having a first polarization state has a second polarization state after being transmitted to the first display area and leaving the stereo projection screen. A second image light beam having the first polarization state still has the first polarization state after being transmitted to the second display area and leaving the stereo projection screen.

Abstract: A display device including at least two light source modules and a display control substrate is provided. Each of the at least two light source substrates has a first surface and a second surface opposite to each other and includes a plurality of light emitting elements and a plurality of connection pads. The light emitting elements are located on the second surface, and the connection pads are located on the first surface and are electrically connected to the light emitting elements. The display control substrate includes a back plate and a plurality of control elements. The control elements are located on the back plate, part of the control elements are electrically connected to the connection pads to drive and control the light emitting elements, and the second surface of each of the at least two light source substrates forms a part of a display surface of the display device.

Abstract: An optical structure film and a light source module are provided. The optical structure film includes multiple optical unit microstructures. Each of the optical unit microstructures has four side surfaces and an inwardly concave beam splitting surface. The beam splitting surface is respectively connected to the side surfaces, and the beam splitting surface has four endpoints when viewed from a front viewing angle. Connection lines of the four endpoints form a rectangle. The beam splitting surface includes at least one beam splitting curved surface. A junction of the at least one beam splitting curved surface and one of the four side surfaces is a first line segment. A projection of a midpoint of an edge of the rectangle on the beam splitting surface overlaps with a relative extreme point of the first line segment.

Abstract: The disclosure provides a viewing angle control module including a first liquid crystal panel, a first polarizer, a second polarizer, and a phase retarder. The first liquid crystal panel includes a first substrate, a second substrate, a first alignment layer, a second alignment layer, a first liquid crystal layer, a first electrode layer, and a second electrode layer. A second alignment direction of the second alignment layer is antiparallel to a first alignment direction of the first alignment layer. The first electrode layer has multiple electrode patterns arranged at intervals along a first direction and extending along a second direction. A first absorption axis of the first polarizer is perpendicular to a second absorption axis of the second polarizer. An included angle between the first absorption axis and the first alignment direction is 45 degrees. A display apparatus including the viewing angle control module is also provided.

Abstract: An electrically controlled optical screen including a switchable scattering element and an electrically controlled decorating module is provided. The switchable scattering element is disposed on a side of the electrically controlled decorating module and is configured to switch between a scattering state and a transparent state. The electrically controlled decorating module includes a first polarizer, a first quarter-wave plate, a cholesteric liquid crystal layer, an electrically controlled wave plate, a second quarter-wave plate and a second polarizer, which are sequentially stacked. The electrically controlled wave plate has a liquid crystal layer. The second polarizer is disposed between the switchable scattering element and the second quarter-wave plate.

Abstract: A viewing angle control device including a plurality of first polarizing portions and a plurality of transmissive portions is provided. The first polarizing portions are arranged along a first direction and extended in a second direction. The transmissive portions and the first polarizing portions are alternately arranged. Each of the first polarizing portions has a width in the first direction and a height in a direction perpendicular to the first direction and the second direction. A ratio of the height to the width of the first polarizing portion is greater than 1. A display apparatus adopting the viewing angle control device is also provided. The viewing angle control device and the display apparatus provided herein have a filter effect at a large viewing angle, improved light transmittance in the viewing angle direction, and excellent anti-peeping performance.