Abstract:
A welding helmet having high structual integrity is formed of a single sheet of composite material, such as Kevlar fabric impregnated with a phenolic thermoset resin; a viewing port in the front of the helmet includes a welding lens is either of fixed or automatically darkening type; and curves, bends, folds and steps in the composite material and trim pieces in the viewing port area and about the peripheral rim of the helmet shell provide additional stiffening for the helmet. A method of making a welding helmet of a single sheet of composite material includes pre-forming the composite material to a shape similar to that of the finished molding helmet shape, and placing the pre-shaped composite material in a compression mold and closing the mold to mold the composite material to shape while curing the composite material by applying heat other otherwise assisting in the curing of the composite material; and mounting a welding lens in a viewing port of the welding helmet.
Abstract:
A method of and apparatus for preparing an image signal includes combining with a video signal having a number of objects of interest metadata identifying the objects as Area of Interest (AOI). Exemplary objects includes an object in a group of objects, such as a horse in a horse race, a sports object, such as a hockey puck, and so on. The object may be an objectionable, such as a representation of violence, sex or vulgar language. A user may provide an input to select an object of interest to alter the prominence of the selected object. A display system responsive to the image signal for showing images having AOI with altered prominence based on user input. A non-transitory computer readable medium containing logic code for carrying out the foregoing.
Abstract:
A system for detecting eye closure through optical observation of the eye includes a frame configured to be worn on a user, a light source, and at least one eyepiece connected to the frame. The eyepiece has a reflective surface on a side facing the user's eye when the frame is positioned on the user and the reflective surface of the eyepiece is configured for reflecting light emitted from the light source onto the eye. A sensor is connected to the frame and is operable to detect light reflected by the eye in a direction that is substantially parallel to the light incident on a retina of the eye to detect that the eye is in an open position.
Abstract:
A wireless remote control is provided for an auto-darkening lens (ADL) system used in a welding helmet, respirator system or other device to control or to adjust settings of an ADL of a controllable light shutter. A display system facilitates providing information indicating the operative settings and/or conditions of the controllable light shutter. A wired remote control for controlling or adjusting an ADL also uses a display system with indicators to indicate the operative settings and/or conditions of the ADL. The display may include a number of indicators, an alpha-numeric display, a heads-up display or other display. The display may include discrete indicators in the peripheral field of view of one eye of a user a controllable. The invention also includes methods of using a remote control for an ADL and of making an ADL to provide for future use of a wireless remote control.
Abstract:
An integral indicator or display for a welding lens, which has a twisted nematic liquid crystal cell light shutter, includes plural independently operable twisted nematic liquid crystal cell indicator portions integral with the light shutter twisted nematic liquid crystal cell, indicia associated with respective indicator portions to indicate an operating characteristic of the welding lens, circuitry for operating the lens and the indicator portions, and one or more switches for stepping the circuit through respective settings of operating characteristics, such as shade darkness, sensitivity and delay time. The indicator is dark when the light shutter is dark, and the light shutter may include in optical series with the twisted nematic liquid crystal cell, a birefringent liquid crystal cell light shutter which is faster acting than the twisted nematic liquid crystal cell and can be driven to various shades at respective speeds depending on applied electric field. A method of protecting the eyes of a welder includes selecting an operating characteristic of a welding lens and using a display portion of the welding lens to display an operating characteristics of the welding lens.
Abstract:
A power supply circuit for a liquid crystal welding lens or shutter provides a consistent and stable regulated power signal for driving or powering the liquid crystal shutter for maintaining stable performance over the life of the power supply and a battery level indicator feature to provide advance warning of degraded device performance.
Abstract:
In one embodiment, a system for monitoring eye movement through optical observation of the eye includes an optical device configured for mounting on a frame for positioning the optical device on a user. The optical device includes a light source configured for emitting light along a first path and a sensor positioned in the optical device to receive light from a second path substantially parallel to the first path. A reflector is located within a lens connected to the frame and configured when positioned on the user to reflect light emitted by the light source onto the eye and reflect light reflected by the eye back to the sensor. The reflector covers only a portion of the lens.
Abstract:
A control for an auto-darkening lens or other optical device monitors light incident on the viewing area or in relatively close proximity to the viewing area of the lens to provide accurate light sensing and to avoid inadvertent blocking of light to one or more light sensors. Reflectors, prisms, prism strips and the like may be used to direct light to the sensor(s). A method for detecting light incident on an auto-darkening lens and a method for controlling an auto-darkening lens direct light from the viewing area of an auto-darkening lens or from relatively close proximity to the viewing area to one or more sensors to detect such light and, accordingly, to control operation of the auto-darkening lens.
Abstract:
A control for a controllable optical device, such as an auto-darkening lens (ADL), such as used in welding helmets, respirators, or other device, includes a sensor sensing the direction of incident light and a control circuit responsive to incident direction information to provide for control of the optical device. Based on at least one of incident direction of light and light intensity a the shade characteristics of the ADL or the like can be controlled and maintained while a person wearing the ADL may move the head to different orientations. Several fixed photosensor arrangements and dynamic systems may be used to sense incident light direction and whether the incident light is a point source. A method of detecting direction of incident light and whether the incident light is from a point source, and of controlling an ADL or the like based on direction and/or intensity of incident light.