Abstract:
A light sensing method having a sensing order adjusting mechanism is provided. The method includes steps of: in a previous sensing cycle, sensing a first light signal that is emitted by both of an ambient light source and a light-emitting component and then is reflected by a tested object; in the previous sensing cycle, sensing a second light signal that is emitted by both of the ambient light source and the light-emitting component and then is reflected by the tested object; in the previous sensing cycle, sensing an ambient light signal emitted by only the ambient light source; and in a next sensing cycle, sensing the first light signal, the second light signal and the ambient light signal in an order different from that in the previous sensing cycle.
Abstract:
There is described a photodetector for detecting incoming infrared light. The photodetector generally has a substrate; an i-type semiconductor region extending along the substrate, the i-type semiconductor region being sandwiched between a p-type semiconductor region and an n-type semiconductor region; a grating coupler being optically connected to one of two ends of the i-type semiconductor region, the grating coupler redirecting incoming infrared light into and along the i-type semiconductor region via the one of the two ends of the i-type semiconductor region for propagation of infrared light along the i-type semiconductor region; and a photocurrent detection circuit electrically connected to the p-type semiconductor region and to the n-type semiconductor region for detecting a photocurrent resulting from said propagation.
Abstract:
A diamond identification apparatus is disclosed, the diamond identification apparatus comprising a support platform for receiving a gemstone at an observation position, a first light source arranged to emit light at a predetermined angle towards the observation position and a first photodiode arranged to detect an amount of light from the first light source being reflected from the gemstone at the observation position. The diamond identification apparatus further comprises a second light source arranged to emit light towards the observation position, a second photodiode arranged to detect light from the second light source that passes through the gemstone at the observation position and a processor unit.
Abstract:
The present disclosure discloses a system for attenuating sound produced by a vehicle. The system comprises a navigation device associated with the vehicle for determining location details of the vehicle, a sound reduction unit provisioned in an exhaust assembly of the vehicle. The system further includes an Electronic Control Unit (ECU) of the vehicle communicatively coupled to the navigation device and the sound reduction unit. The ECU is configured to detect sound reduction location, by comparing the location details with a pre-defined location data and operate the sound reduction unit to attenuate sound produced by the vehicle when the sound reduction location is detected. The system of the present disclosure, attenuates sound intensity of the vehicle to a desired level by considering surrounding conditions of the vehicle, thus the vehicle noise may be automatically attenuated in the sound sensitive areas or locations.
Abstract:
An ultraviolet index measuring method and apparatus includes preparing a first photosensor having spectral response only in a first section of a wavelength between 250 nm and 298 nm, a second photosensor having spectral response only in a second section of a wavelength between 298 nm and 328 nm, and a third photosensor having spectral response only in a third section of a wavelength between 328 nm and 400 nm. An output signal of the first photosensor, an output signal of the second photosensor, and an output signal of the third photosensor are calibrated using spectral irradiance of reference solar light. First photocurrent of the first photosensor, second photocurrent of the second photosensor, and third photocurrent of the third photosensor are measured under a measurement environment. An ultraviolet index is calculated using the first photocurrent, the second photocurrent, and the third photocurrent under the measurement environment.
Abstract:
A vehicle is disclosed. The vehicle includes a first indicator light associated with a first function or a first state of the vehicle (e.g., a brake light), and circuitry coupled to the first indicator light. The circuitry is configured to cause the first indicator light to emit light when the vehicle is performing the first function or is operating in the first state, and detect an amount of light incident on the first indicator light. Thus, the indicator light can be used to detect incoming light to perform various vehicle functions (e.g., automatically dimming mirrors based on the incoming light) without the need for a dedicated light sensor.
Abstract:
An earpiece includes an earpiece housing, a processor disposed within the earpiece housing, and a gesture based interface operatively connected to the processor and configured to detect changes in an energy field associated with user gestures. The processor is configured to interpret the changes in the energy field to determine the user gestures.
Abstract:
Aspects of the present disclosure relate to a security device, in particular, a multilayered security device. The multilayered security device includes a substrate layer having a first substrate. The substrate layer attaches to the product. The multilayered security device also includes a graphene layer. The graphene layer has a first continuous graphene sheet that is made of a monolayer of covalently-bonded carbon atoms. The graphene layer also forms, in response to exposure to a verification stimulus, a contrasting pattern with respect to an exposed substrate area from the substrate layer.
Abstract:
Techniques are disclosed for maintaining consistent lumen output of a lighting assembly over time. By maintaining a consistent lumen output, it is possible to maintain acceptable color stability where color mixing of multiple outputs is used. The lighting assembly may be any lighting configuration that might suffer from lumen depreciation and/or color drift over time, and may include any type(s) of light source(s) that may be monitored and driven accordingly. The lighting assembly, in addition to light source(s), includes a photo detector and a directed light source, such as a laser. The directed light source provides a golden sample for use in calibrating the photo detector, which in turn monitors lumen output of the light source(s). Drive signals are adjusted to account for lumen depreciation of the monitored light source(s).
Abstract:
There is provided a method for improving a night vision by operating a pair of eyeglasses comprising: a sensor that detects an intensity of a light near a user; a comparator device that compares the detected light intensity near the user against a dimness threshold; and an onboard projector in the pair of eyeglasses projecting a red light simultaneously into each eye of the user if the detected light intensity near the user becomes lower than the threshold.