Abstract: A heat exchanger includes a roll-bond evaporator having a heatpipe channel network spanning a primary panel area and at least one secondary multiple panel area, and at least one plurality of fins joined to at least one secondary panel area. The primary panel area is configured to receive electronic circuitry, heat transfer fluid is evaporated in heatpipe channels of the primary panel area, the heat transfer fluid is condensed in heatpipe channels in the secondary panel area(s), and heat is dissipated by the fins into an ambient environment. Secondary panel areas may be bent to bound a cavity and/or assume a generally cylindrical shape. The heat exchanger may be incorporated into a small cell radio node for 5G telecommunications.

Abstract: A polarization controller comprising: (i) an optical fiber, and (ii) a carrier surrounding the optical fiber, the carrier comprising an off-center through hole with at least one collapsed region, such that the optical fiber is situated within the through hole and contacts the at least one collapsed region of the through hole, and the collapsed region exerts pressure on the optical fiber.

Abstract: A polarization controller comprising: (i) an optical fiber, and (ii) a carrier surrounding the optical fiber, the carrier comprising an off-center through hole with at least one collapsed region, such that the optical fiber is situated within the through hole and contacts the at least one collapsed region of the through hole, and the collapsed region exerts pressure on the optical fiber.

Abstract: A polarization controller comprising: (i) an optical fiber, and (ii) a carrier surrounding the optical fiber, the carrier comprising an off-center through hole with at least one collapsed region, such that the optical fiber is situated within the through hole and contacts the at least one collapsed region of the through hole, and the collapsed region exerts pressure on the optical fiber.

Abstract: An optical-electrical substrate for providing electrical and optical connections to a photonic integrated circuit (PIC) includes a glass body with glass optical waveguides along an upper surface, and electrically conductive vias extending through a portion of the glass body from an intermediate surface to a lower surface. The intermediate surface is arranged at an elevation positioned between the upper and lower surfaces, and may optionally support redistribution layers and an electrical integrated circuit. An optical-electrical substrate may be fabricated by defining glass optical waveguides along an upper surface of a glass body, and forming electrically conductive vias through the glass body from the intermediate surface to the lower surface.

Abstract: A touch-screen assembly for performing pressure sensing or force sensing is disclosed. The touch-screen assembly includes a cover sheet having touch-sensing capability and a frame having an upper surface portion. Spaced-apart adhesive islands are disposed between the cover sheet and the upper surface portion of the frame. The adhesive islands serve to secure the cover sheet to the frame and have a Young's modulus of greater than 1 MPa so that the energy associated with the touching force is not absorbed by the adhesive island. This makes for more accurate pressure-based or force-based touch sensing.

Abstract: A touch-screen assembly for performing pressure sensing or force sensing is disclosed. The touch-screen assembly includes a cover sheet having touch-sensing capability and a frame having an upper surface portion. Spaced-apart adhesive islands are disposed between the cover sheet and the upper surface portion of the frame. The adhesive islands serve to secure the cover sheet to the frame and have a Young's modulus of greater than 1 MPa so that the energy associated with the touching force is not absorbed by the adhesive island. This makes for more accurate pressure-based or force-based touch sensing.

Abstract: A touch-screen assembly for performing pressure sensing or force sensing is disclosed. The touch-screen assembly includes a cover sheet having touch-sensing capability and a frame having an upper surface portion. Spaced-apart adhesive islands are disposed between the cover sheet and the upper surface portion of the frame. The adhesive islands serve to secure the cover sheet to the frame and have a Young's modulus of greater than 1 MPa so that the energy associated with the touching force is not absorbed by the adhesive island. This makes for more accurate pressure-based or force-based touch sensing.

Abstract: A pressure-sensing touch system for an electronic display includes a plurality of pressure sensors and a controller. Each pressure sensor of the plurality of pressure sensors is configured to generate a signal indicative of pressure applied to a surface of the electronic display. The controller is configured to (i) receive spatial coordinates of a plurality of touch events simultaneously occurring on the electronic display, (ii) select a subset of the plurality of pressure sensors, and (iii) calculate pressure values respectively corresponding to the plurality of touch events based on the spatial coordinates and the signals from the selected subset. The selected subset is a proper subset.

Abstract: A touch screen system configured to detect a displacement of a cover sheet when pressure or force is applied to the cover sheet upper surface. A light source and photodetector are configured to be in optical communication by reflection of light from the light source from the lower surface of the cover sheet. A displacement of the coversheet changes the amount of reflected light that falls upon the detector. The detector signal can be used to measure the amount of displacement, as well as the time-evolution of the displacement. The touch-screen system can be interfaced with a touch-sensitive display unit to form a display system having both pressure-sensing capability and touch-sensing capability.

Abstract: Cantilevered displacement sensors with enhanced displacement sensitivity and methods of determining touching forces for multiple touch locations are disclosed. The cantilevered displacement sensors support the touch screen adjacent a touch screen perimeter. A displacement of the touch screen is amplified by a cantilevered member that extends over a proximity sensor. Touching forces at multiple touch locations are determining by performing a fit to the measured displacements based on the touch locations to obtain displacements at all positions of the touchscreen, then relating the displacement of the touch screen at the multiple touch locations to applied distributed loads at the respective multiple touch locations, and then multiplying the applied distributed loads by the corresponding touch-location area.

Abstract: A touch-screen assembly for performing pressure sensing or force sensing is disclosed. The touch-screen assembly includes a cover sheet having touch-sensing capability and a frame having an upper surface portion. Spaced-apart adhesive islands are disposed between the cover sheet and the upper surface portion of the frame. The adhesive islands serve to secure the cover sheet to the frame and have a Young's modulus of greater than 1 MPa so that the energy associated with the touching force is not absorbed by the adhesive island. This makes for more accurate pressure-based or force-based touch sensing.

Abstract: Cantilevered displacement sensors with enhanced displacement sensitivity and methods of determining touching forces for multiple touch locations are disclosed. The cantilevered displacement sensors support the touch screen adjacent a touch screen perimeter. A displacement of the touch screen is amplified by a cantilevered member that extends over a proximity sensor. Touching forces at multiple touch locations are determining by performing a fit to the measured displacements based on the touch locations to obtain displacements at all positions of the touchscreen, then relating the displacement of the touch screen at the multiple touch locations to applied distributed loads at the respective multiple touch locations, and then multiplying the applied distributed loads by the corresponding touch-location area.

Abstract: Touch screen systems and methods based on touch location and touching force are disclosed. The touch screen system includes an optical force-sensing system interfaced with a capacitive touch sensing system so that both touch location and touch force information can be obtained. A display that utilizes the touch screen system is also disclosed.

Abstract: A touch screen system configured to detect a displacement of a cover sheet when pressure or force is applied to the cover sheet upper surface. A light source and photodetector are configured to be in optical communication by reflection of light from the light source from the lower surface of the cover sheet. A displacement of the coversheet changes the amount of reflected light that falls upon the detector. The detector signal can be used to measure the amount of displacement, as well as the time-evolution of the displacement. The touch-screen system can be interfaced with a touch-sensitive display unit to form a display system having both pressure-sensing capability and touch-sensing capability.