Lite-On Singapore Pte. Ltd.

Tong-Tee Tan

Seng-Yee Chua

John Julius De Leon Asuncion

Guang-Li Song

Lee-Cheng Tay

Mon-Oo Win

Jiaqi Sun

Prabakaran Chinnusamy

A fault detector circuit is provided for detecting or controlling any signal related to a laser emitter in an electronic device. The fault detector circuit includes a first NMOS transistor and a comparator. A drain of the first NMOS transistor is coupled to a first supply voltage through the laser emitter. A gate of the first NMOS transistor is coupled to a control voltage. A source of the first NMOS transistor is grounded. The comparator is coupled to the drain of the first NMOS transistor and a reference voltage. The comparator compares a voltage of the drain of the first NMOS transistor with the reference voltage to generate a first detecting signal for determining whether or not the first supply voltage of the laser emitter needs to be cut off.

Fault detector circuit

A proximity sensing module with dual transmitters includes a circuit board, a package housing, a sensing assembly and a transmitter unit. The sensing assembly includes a sensor disposed on the circuit board. The transmitter unit is shielded from the sensing assembly through the package housing and includes a first transmitter and a second transmitter both disposed on the circuit board. One of the first transmitter and the second transmitter is closer to the sensing assembly.

Proximity sensing module with dual transmitters for emitting signals to different objects from different distances

A method for ambient light subtraction providing a sensor having an emitter, a receiver, and a processor; performing a first sampling process, during which the emitter does not emit signals, the receiver receives a first ambient light signal converted into a first data set by the processor; performing a second sampling process, during which the emitter emits a detecting signal, the receiver receives a second ambient light signal and the detecting signal converted into a second data set by the processor; performing a third sampling process, during which the emitter does not emit signals, the receiver receives a third ambient light signal converted into a third data set by the processor; deriving an average value by calculating the average of the first data set and the third data set; and deriving a difference value by calculating the difference between the second data set and the average value.

Method for ambient light subtraction

A proximity sensing module with dual transmitters includes a circuit board, a package housing, a transmitter unit and a sensing assembly. The transmitter unit includes a first transmitter and a second transmitter. The first transmitter and the second transmitter are disposed on the circuit board. The sensing assembly includes a sensor disposed on the circuit board. The transmitter unit is shielded from the sensing assembly through the package housing. One of the first transmitter and the second transmitter is nearer to the sensing assembly than the other one is.

Proximity sensing module with dual transmitters

An exemplary embodiment of the present disclosure illustrates a gesture sensing module disposed on a substrate. The gesture sensing module includes at least one light emitting unit, at least one light sensor, and a control circuit. The light emitting unit provides a light to illuminate a sensing area, wherein a central optical axis of the light forms an angle with a normal vector of the substrate, and the angle is not equal to 0. The light sensor senses a reflection light which a target in the sensing area reflects the light, and generate a sensing signal according to the reflection light. The control circuit coupled to the light sensor and the light emitting unit determines a traveling direction of the target according to the sensing signal.

Gesture sensing module

An ambient light sensing method is provided. The ambient light sensing method comprises: acquiring the sensitivity settings, an exposure time and obtaining a sensing signal of a light sensor according to the sensitivity settings and the exposure time; determining whether the magnitude of the sensing signal is within a predetermined range when the sensing signal is available, wherein the predetermined range has an upper value and a lower value; updating the sensitivity settings and the exposure time of the light sensor according to the determined result for the magnitude of the sensing signal; and acquiring the sensing signal of the light sensor with the updated sensitivity settings and the updated exposure time.

Ambient light sensing method and an ambient light sensing device

An exemplary embodiment of the present disclosure illustrates a proximity sensing method used in a controller of a proximity sensing device. Firstly, a cross talk value is initialized. After the cross talk value is initialized, whether the cross talk value should be updated is judged at least according to a first sensing value currently received from a sensing unit of the proximity sensing device. When the cross talk value is judged to be updated, the cross talk value is updated at least according to a first sensing value. Then, a compensated sensing value is obtained by subtracting the cross talk value from the first sensing value.

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Singapore, Singapore

Tong-Tee Tan