Safety systems for operating equipment have a source of visible light, a first signal light transmitter, a first signal light receiver, preferably a second signal light transmitter and second signal light receiver. A fiber optic bundle with at least one section of illuminated cable emits the visible light and carries the signal light. The signal light follows an optical circuit through the fiber optic bundle from the signal light transmitters to the signal light receivers. The signal light receivers are connected to suitable controls of the system such that if a predetermined light signal is not received by the signal light receiver(s), the operating equipment will stop and/or alarms will be generated. The fiber optic bundle is connected to optical pull switches which interrupt the light circuit if a person applies a predetermined pull force to the optical fiber bundle.

A device includes a display portion that includes a display housing and a display within the display housing. The device also includes a base portion flexibly coupled to the display portion and comprising a glass member defining a keyboard region configured to receive user input, a first haptic actuator configured to produce a first haptic output at a first area of the keyboard region, and a second haptic actuator configured to produce a second haptic output at a second area of the keyboard region that is different from the first area.

Four infrared LEDs and two photodiodes PD are arranged below a lower side of a display surface in the order of an LED1, a PD1, an LED2, an LED3, a PD2, and an LED4. A detection signal A1 of the PD1 when the LED1 emits light, a detection signal A2 of the PD1 when the LED2 emits light, a detection signal A3 of the PD2 when the LED3 emits light, and a detection signal A4 of the PD2 when the LED4 emits light are used to estimate a reflection generation position in the left-right direction, and a threshold Th is set such that the threshold Th increases when the reflection generation position is on the left side, which is a driver's seat side. If the maximum value of A1, A2, A3, and A4 exceeds the threshold Th, the approach of the user's hand is detected.

A photoelectrical type of mechanical switch, wherein a chute is provided on the bracket; the ram upper end is provided with a protruding strip arranged in the chute which can freely move along the chute; when the bracket moves up and down, the protruding strip is restricted by the chute and drives the ram to rotate by itself. Adoption of the independent sound optical path structure enables its exhibition of more obvious key-pressing stage sense and key-pressing sound when pressing the press shaft, and can realize good “ON/OFF” function of optical path.

The invention relates to a display device (210) which is provided with a display (212) and a backlighting unit (218) arranged behind the display (212). The backlighting unit (218) comprises a light guide plate (222) which has an upper light guide plate element (222a) and a lower light guide plate element (222b). Backlight (230) of light sources (220) is fed laterally into the upper light guide plate element (222a), which is emitted from the light emission side (228) of the light guide plate (222) after deflection and scattering within the light guide plate element (222a). Sensor radiation is fed into the lower light guide plate element (222b) by means of proximity sensor system transmitter elements (236), wherein said sensor radiation is likewise emitted from the light emission side (228) of the light guide plate (222) after reflection and scattering. Both light guide plate elements (222a, 222b) are optimized for the wavelengths of the radiation which is fed into the latter. The lateral arrangement of the proximity sensor system transmitter elements (236) and the light sources (220) results in a space-saving arrangement. After reflection on an object located in front of the display (212), the sensor radiation reaches the proximity sensor system receiver elements (238).

A keyboard includes an elastic element disposed above a bottom case, a light emitter, a light receiver, a pressing element, and a keycap. When a force toward the bottom case is applied to a top surface of the elastic element, a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a negative correlation in a path of the top surface from a first position to a second position, and a relationship between a force to move the top surface and a distance from the top surface to the bottom case is in a positive correlation in a path of the top surface from the second position to a third position. The light emitter, the light receiver, and the pressing element are disposed above the elastic element. The keycap is disposed above the pressing element.

A method for adjusting an optical switch keyboard and an optical switch keyboard using the adjusting method are provided. The optical switch keyboard has a number of key units. The method includes the following steps. A scan signal is applied to one of a number of scan lines by a control unit at a first scan time point. A light is emitted by a light source according to the scan signal. A light emitted by the light source is detected by a detecting element to generate a detecting electric signal. The detecting electric signal is read by the control unit to obtain a first read signal voltage. When the first read signal voltage is outside the voltage range of the pressed state of the key unit, the period of the scan signal is increased by a first predetermined amount by the control unit to obtain an adjusted scan signal.

A method and apparatus for ranging finding of signal transmitting devices is provided. The method of signal reception is digitally based only and does not require receivers that are analog measurement devices. Ranging can be achieved using a single pulse emitting device operating in range spaced relation with a minimum of a single signal transmitter and a single digital receiver and processing circuitry. In general a plurality of transmitting pulsed emitters may be ranged and positioned virtually simultaneously in 3-dimensions (XYZ coordinates) using a configuration of a plurality of digital receivers arranged in any fixed 3-dimensional configuration. Applications may involve at least one single transmitter to receiver design to determine range, or at least one transmitted reflecting signal off from an object to determine range.

Optically isolated micromachined (MEMS) switches and related methods are described. The optically isolated MEMS switches described herein may be used to provide isolation between electronic devices. For example, the optically isolated MEMS switches of the types described herein can enable the use of separate grounds between the receiving electronic device and the control circuitry. Isolation of high-voltage signals and high-voltage power supplies can be achieved by using an optical isolator and a MEMS switch, where the optical isolator controls the state of the MEMS switch. In some embodiments, utilizing optical isolators to provide high voltages, the need for electric high-voltage sources such as high-voltage power supplies and charge pumps may be removed, thus removing the cause of potential damage to the receiving electronic device. In one example, the optical isolator and the MEMS switch may be co-packaged on the same substrate.

A semiconductor device package is provided, which includes a carrier, an emitter and a first transparent encapsulant. The carrier has a first surface. The emitter is disposed on the first surface. The first transparent encapsulant encapsulates the emitter. The first transparent encapsulant includes a body and a lens portion. The body has a first planar surface. The lens portion is disposed on the body and has a first planar surface. The first planar surface of the lens portion is substantially coplanar with the first planar surface of the body.