Patent application number | Description | Published |
20090020684 | Illumination apparatus and optical radiation control method thereof - The present invention discloses an illumination apparatus and an optical radiation control method. The illumination apparatus includes at least one light emitting module, an optical detector, a temperature calculating module and a control module. These emitting modules are for producing a light beam and the control module is for generating a PWM signal to drive the emitting modules. The optical detector electrically connected to the control module is for detecting the optical radiation of light emitted from the light modules. The temperature calculating module is for calculating the temperature of the illumination apparatus based on the PWM signal and a predetermined PWM width. The control module can adjust the optical radiation of light emitted from the light modules based on the temperature and the detected data of the optical detector. | 01-22-2009 |
20090161890 | MICRO-ELECTRO-MECHANICAL SYSTEMS (MEMS) CAPACITIVE SENSING CIRCUIT - The present invention discloses a Micro-Electro-Mechanical Systems (MEMS) capacitive sensing circuit wherein two input nodes of a fully differential amplifier are separately connected to a MEMS capacitive sensing device and a matching capacitor, which both contain similar capacity value and connect to a bias node, and two resistors separately connect the MEMS capacitive sensing device and the matching capacitor to ground (zero voltage). Thus, the present invention could effectively eliminate the bias noise in the circuit without any discrete capacitor and capable for designer to integrate all circuit devices into an IC. | 06-25-2009 |
20100040377 | Optical sensing module based on pulse width modulation signal and method thereof - A optical sensing module based on signals having pulse width modulation and a method thereof are disclosed for sensing a light source and providing an output signal having pulse width modulation. The optical sensing module comprises an optical sensor, a signal processing unit, and a duty cycle modulation unit. The signal processing unit provides a modulation control signal based on a sensing signal generated by sensing the light source from the optical sensor in conjunction with a gain control signal. The duty cycle modulation unit modulates the duty cycle of the pulse width modulation input signal to generate the pulse width modulation output signal based on the modulation control signal. The duty cycle difference between the duty cycle of the input signal and the duty cycle of the output signal is proportional to the intensity difference between the light source and a reference light source. | 02-18-2010 |
20100097009 | SWITCHING CONVERTER FOR LIGHTING WITH LIGHT INTENSITY AS FEEDBACK AND LIGHT EMITTING APPARATUS USING THE SAME - A light emitting apparatus comprises a light emitting element and a switching converter comprising a conversion circuit for converting an operating electric signal to generate the driving electric signal, a feedback circuit having a light detecting element for detecting a luminous intensity of the light emitting element and generating a feedback signal, and a control circuit for receiving the feedback signal, comparing the received feedback signal with a reference electric signal, and controlling the conversion circuit based on comparison results to adjust the driving electric signal. Alternatively, the light detecting element detects ambient light and the control circuit controls the conversion circuit based on comparison results to stop or enable outputting of the driving electric signal. | 04-22-2010 |
20100277711 | OPTICAL QUANTIZED DISTANCE MEASURING APPARATUS AND METHOD THEREOF - The present invention discloses an optical quantized distance measuring apparatus and a method thereof. The optical distance quantized measuring apparatus comprises an illuminating module, a sensing component array and a processing module. The illuminating module projects a light source onto an object to generate a reflecting light. The sensing component array receives the reflecting light, which generates a light source location on the sensing component array. The processing module determines the light source location, and determines an interval between the object and the sensing component array according to the light source location. The processing module determines the light source location with the binary search algorithm. | 11-04-2010 |
20110090482 | OPTICAL POSITION DETECTING DEVICE AND METHOD THEREOF - The present invention relates to an optical position detecting device and method thereof, comprising multiple light emitting components, a driving unit, at least one photo detecting unit, a position storing unit and a position determining unit. Each light emitting components disposed on a plane to form a sensing area respectively projects a light source into the sensing area. The disposing positions of light emitting components and photo detecting unit are recorded in the position determining unit. The driving unit drives light emitting components sequentially. When an object encounters the projected light source above the sensing area, thus sequentially creating a reflected light signal, the photo detecting unit respectively generates sensed signals based on the intensity of the reflected light signal. The position storing unit records the positions of light emitting components and photo detecting unit. The position determining unit determines the position of the object. | 04-21-2011 |
20110115472 | CONTROL CIRCUIT FOR CURRENT DETECTION - A control circuit for current detection is disclosed. The control circuit outputting an output current to a power device comprises at least one first Field Effect Transistor (FET) coupled to the positive input terminal of an operational amplifier. The first FET is coupled to the power device through two voltage terminals, wherein the output current is passed through the first FET. The control circuit further comprises at least one second FET coupled to the first FET and the negative input terminal of the first operational amplifier, utilizing the virtual-short characteristic of the first operational amplifier to form a current mirror with the first FET, and copying the output current to generate a copy current by a scale whereby the output current is detected by the copy current. The invention detects the output current without consuming additional power so as to measure the power consumption for the power device. | 05-19-2011 |
20110226952 | Reflection Sensing System - A reflection sensing system comprises a body, an illuming module and a detecting module. The body is made by low temperature co-fired ceramic (LTCC) technology or other plasticity colloids and disposed a plurality of electronic connecting points. The illuming module includes a first accommodating space and a light emitted diode (LED), and the detecting module includes a light detector. The first accommodating space is disposed on the body and having a first open at one side. The cross-section of the first accommodating space is parabolic. The LED is disposed at the site of the focus of the first accommodating space, connected to the electronic connecting points and facing to the first open. The light detector is disposed on the body, connected to the electronic connecting points and providing sensing signals after receiving light. | 09-22-2011 |
20140001492 | Photo-Coupler Device | 01-02-2014 |
20140246592 | OPTICAL SENSOR SYSTEM - An optical sensor system is disclosed. The optical sensor system comprises a panel and a sensing unit. The panel comprises a plurality of transparent areas. The sensing unit locates at one side of the panel and the sensing unit senses a plurality of first light signals reflected by an object and senses a plurality second light signals of an ambient light. The reflected first light signals and the second light signals pass through one of the plurality of transparent areas of the panel. The sensing unit further comprises a light sensor and a plurality of gesture sensors. The light sensor locates at the center of the sensing unit, and the light sensor senses the second light signals. The plurality of gesture sensors surrounds the light sensor, and the gesture sensors senses the reflected first light signals and then produce gesture signals corresponding to motions of the object. | 09-04-2014 |