A method of detecting a defect in an electronic display includes taking a digital image of the electronic display; and electronically determining if an area of the electronic display is defective based on data of the digital image.

A method of detecting a defect in an electronic display includes taking a digital image of the electronic display; and electronically determining if an area of the electronic display is defective based on data of the digital image.

A security device in an electronic device which protects against unauthorized disassembly includes light sources, a plurality of photosensitive elements, a detection unit, a storage unit, a processor, and light guiding devices. Light conducting channels are provided between the light sources and the induction elements. Barrier objects that block light are installed at certain first light guiding channels of the light guiding channels, and are removed from the first light conducting channels when the electronic device is disassembled, so that induction signals output by the photosensitive elements are changed from the model or original digitally-recorded signals.

A security device in an electronic device which protects against unauthorized disassembly includes light sources, a plurality of photosensitive elements, a detection unit, a storage unit, a processor, and light guiding devices. Light conducting channels are provided between the light sources and the induction elements. Barrier objects that block light are installed at certain first light guiding channels of the light guiding channels, and are removed from the first light conducting channels when the electronic device is disassembled, so that induction signals output by the photosensitive elements are changed from the model or original digitally-recorded signals.

The output of an avalanche photodiode (APD) comprises a “photocurrent” component comprising photon initiated events resulting from the interaction of photons with the APD and a “dark current” component comprising dark carrier events arising in the APD even when the APD is not exposed to light. Differences in the pulse height distributions of photon initiated events and dark carrier initiated events are used to statistically discriminate between photocurrent and dark current components of APD output.

The output of an avalanche photodiode (APD) comprises a “photocurrent” component comprising photon initiated events resulting from the interaction of photons with the APD and a “dark current” component comprising dark carrier events arising in the APD even when the APD is not exposed to light. Differences in the pulse height distributions of photon initiated events and dark carrier initiated events are used to statistically discriminate between photocurrent and dark current components of APD output.

An aquarium photometer system includes a housing unit, an arm, and a mirror. The housing unit includes a light sensor configured to sense light incident on the light sensor and to convert the incident light to a signal. The housing unit also includes an operational amplifier including a first input node, a second input node, and an output node. The operational amplifier is configured to: receive the signal at the first input node, amplify a difference between the signal at the first input node and a signal at the second input node by a gain factor, and output the amplified signal on the output node. The housing unit also includes a potentiometer connected to the operational amplifier and configured to regulate the amplified signal; and a display connected to the potentiometer and configured to show an intensity of light detected by the light sensor based on the regulated amplified signal. The arm at a first end is connected to the housing unit and configured to move the housing unit around an aquarium case. The mirror is located on a bar and positioned within the aquarium in front of the light sensor and at a focal distance from the light sensor and configured to increase an amount of light incident on the light sensor.

A control device with automatic adjustment includes: an ambient light illumination sensor for sensing ambient light illumination information; and a microcontroller unit coupled to the ambient light illumination sensor. The microcontroller unit analyzes respective ambient illumination information at each of a plurality of time sessions. The microcontroller unit controls a controlled device based on the respective ambient illumination information at the time sessions.

A control device with automatic adjustment includes: an ambient light illumination sensor for sensing ambient light illumination information; and a microcontroller unit coupled to the ambient light illumination sensor. The microcontroller unit analyzes respective ambient illumination information at each of a plurality of time sessions. The microcontroller unit controls a controlled device based on the respective ambient illumination information at the time sessions.

A radiation detection apparatus according to an embodiment includes a radiation detector that detects radiation; a first measurer that measures energy of the radiation from the radiation detected by the radiation detector; and a second measurer that measures the number of times that the radiation detector detects the radiation.