Abstract: A computer readable recording medium storing at least one program, wherein an image quality improvement method is performed when the program is executed. The image quality improvement method comprising: (a) classifying data units of a target image to normal data units and abnormal data units based on relations between brightness values of the data units and a classification parameter, wherein the classification parameter is related with an image quality of the target image or the brightness values of the data units; and (b) adjusting the brightness values of the abnormal data units based on an adjusting parameter to generate adjusted brightness values, such that differences between the adjusted brightness values and the brightness values of the normal data units are reduced. An optical navigation method using the image quality improvement method is also disclosed.

Abstract: There is provided a force sensor including a substrate and a polymer material layer. The substrate has a circuit layout that includes a first electrode and a second electrode configured to form a capacitor therebetween. The polymer material layer covers at least on a space between the first electrode and the second electrode, and is used to change capacitance of the capacitor while being pressed.

Abstract: There is provided a touch force sensor including a first drive electrode, a second drive electrode and a receiving electrode. The first drive electrode is used to form a first capacitance with the receiving electrode. The second drive electrode is used to form a second capacitance with the receiving electrode. The receiving electrode shields the first drive electrode such that when a conductor approaches the receiving electrode, only the second capacitance is changed but the first capacitance is not changed. The first capacitance is changed only when the conductor gives a force upon the receiving electrode.

Abstract: A method for reducing jitter of a mouse when in a stationary condition, including: receiving a plurality of raw delta; comparing a movement of the mouse with a predetermined threshold; and when the movement is less than the predetermined threshold, entering a dynamic downshift mode. Entering the dynamic downshift mode includes: storing raw delta into a multi-tap buffer; when the multi-tap buffer is not full, outputting the raw delta as reported delta; and when the multi-tap buffer is full, calculating an average of the total raw delta stored in the multi-tap buffer, and outputting the average delta as reported delta.

Abstract: A method of a pointing device which is used to be coupled to a host system through a universal serial bus (USB) communication interface includes: providing a USB driver device to communicate with the host system via the USB communication interface; monitoring a specific voltage change or a specific data transmission state of the USB communication interface to generate a monitoring result; and correcting a USB state of the USB driver device when the monitoring result indicates that a undefined or abnormal behavior of the host system occurs.

Abstract: A method of an electronic device includes: providing a capacitive digital-to-analog converter having a reference voltage input; providing a reference voltage providing circuit to generate a reference voltage to the reference voltage input of the capacitive digital-to-analog converter; and, generating a compensation signal into the reference voltage input of the capacitive digital-to-analog converter in response to at least one switching of at least one capacitor in a switchable capacitor network of the capacitive digital-to-analog converter.

Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.

Abstract: A wearable device includes a case and a far infrared temperature sensing device. The case has a first opening. The far infrared temperature sensing device is disposed inside the case of the wearable device. The far infrared temperature sensing device includes an assembly structure, a sensor chip, a filter structure, and a metal shielding structure. The assembly structure has an accommodating space and a top opening. The sensor chip is disposed in the accommodating space of the assembly structure. The filter structure is disposed above the sensor chip. The metal shielding structure is disposed above the sensor chip, and has a second opening to expose the filter structure. The first and second openings are communicated to cooperatively define a through hole.

Abstract: There is provided a heart rate detection device including a sensing unit for sensing emergent light from subcutaneous tissues illuminated by a single light source of multiple light colors to output multiple light detection signals associated with multiple wavelengths. The heart rate detection device further includes a processor uses the multiple light detection signals associated with the multiple wavelengths to cancel motion artifact to obtain a clean heart rate signal.

Abstract: A liquid level detection system of detecting a target container includes a main body, an optical sensor, a fan and an operational processor. The main body has a supporting platform whereon the target container is disposed. The optical sensor is disposed above the supporting platform and adapted to output a detection image containing the target container. The fan is disposed on the main body and faces the supporting platform. The operational processor is electrically connected to the optical sensor, and adapted to analyze the detection image generated within an operation period of the fan and further to acquire an effective feature of the target container inside the detection image.

Abstract: There is provided a portable electronic device including a backlight module, an ambient light sensor, a proximity sensor and a processing unit. The backlight module illuminates with backlight brightness. The ambient light sensor is configured to detect ambient light intensity. The proximity sensor is configured to detect an object. The processing unit is configured to activate the proximity sensor when the ambient light intensity detected by the ambient light sensor is lower than a predetermined value or decreases more than a predetermined range, and to maintain or reduce the backlight brightness according to a detection result of the proximity sensor. There is further provided an automatic detection method.

Abstract: There is provided a cleaning robot system including a charging station and a cleaning robot. The charging station includes multiple positioning beacons. The cleaning robot includes an image sensor and a processor. The image sensor is used to acquire light generated by the multiple positioning beacons on the charging station and generate an image frame. The processor is electrically connected to the image sensor, and used to calculate a relative position with respect to the charging station according to beacon images of the multiple positioning beacons in the image frame to determine a recharge path accordingly.

Abstract: An inductor circuit includes a receiver inductive circuit, a transmitter inductive circuit, and an antenna inductive circuit which are implemented on a single chip die; the receiver inductive circuit is disposed on a specific ring of a specific plane to form a ring shape; the transmitter inductive circuit and the antenna inductive circuit are disposed inside the specific ring and surrounded by the specific ring of the specific plane; and, a circuit area, occupied by the transmitter inductive circuit, inside the specific ring and on the specific plane, is larger than a circuit area occupied by the receiver inductive circuit and by the antenna inductive circuit.

Abstract: There is provided an optical encoder including a photodiode array and a code disk opposite to each other. The photodiode array includes at least three sets of position photodiodes and two index photodiodes arranged transversally. The two index photodiodes are adjacently arranged at the same side of the at least three sets of position photodiodes. A first set of position photodiodes and a last set of position photodiodes of the at least three sets of position photodiodes are partially covered to alleviate the total harmonic distortion. The rest position photodiodes of the at least three sets of position photodiodes other than the first and last sets of position photodiodes are not covered.

Abstract: A method of wireless communication locator station to be disposed at specific location includes: detecting rotation angle information of client-based portable device, carried or worn by user, according to specific wireless communication standard between wireless communication locator station and client-based portable device when client-based portable device is within signal range of wireless communication locator station; generating head pose direction estimation according to calculated rotation angle information; and when head pose direction estimation indicates that a user turns face towards wireless communication locator station, sending packet signal from wireless communication locator station to server-based portable device, successfully paired with and security-connected with client-based portable device, so that server-based portable device can transfer packet signal to client-based portable device after receiving packet signal.

Abstract: A respiration rate detection device including a photoplethysmography (PPG) detector, an acceleration detector and a processing unit is provided. The processing unit calculates an acceleration peak frequency in an acceleration frequency spectrum, and takes a PPG acceleration peak frequency in a PPG frequency spectrum corresponding to the acceleration peak frequency as a respiration rate.

Abstract: A detecting device for detecting liquid or colloid, comprising: a light emitting device, configured to emit first light, wherein a first angle between a first emitting direction of the first light and a surface when the detecting device is located on the surface, wherein the first angle is larger than 0° and smaller than 90°; an optical sensor, configured to detect first optical data generated based on the first light; and a processing circuit, configured to determine if the liquid or the colloid exists in a predetermined range of the detecting device based on the first optical data. An automatic cleaner applying the detecting device is also disclosed.

Abstract: There is provided a pixel circuit capable of outputting time difference data and image data, and including an image circuit and a difference circuit. The image circuit is used to record and output detected light energy of a first interval as the image data. The difference circuit is used to record and output a variation of detected light energy between the first interval and a second interval as the time difference data. The pixel circuit selects to output at least one of the time difference data and the image data.

Abstract: An image noise compensating system, comprising: a distance determining device, configured to determine whether a distance is larger than a distance threshold or not; an image sensor, comprising at least one image sensing unit, wherein the image sensor forms a combined image sensing unit when the distance is smaller than the distance threshold and senses images without forming the combined image sensing unit when the distance is larger than the distance threshold, wherein a width of an area that the combined image sensing unit can sense is larger than a width of an area that the image sensing unit can sense; a noise compensating circuit, configured to compensate image noises; and a control circuit, configured to calculate a location of the image noise compensating system.

Abstract: A method of a navigation sensor circuit includes: monitoring at least one polling request signal sent from a microcontroller during a variable time interval, wherein the microcontroller is externally coupled to the navigation sensor circuit; calculating at least one polling rate of the microcontroller according to the at least one polling request signal; and dynamically adjusting a sensor frame rate of the navigation sensor circuit according the at least one polling rate, wherein an image sensor of the navigation sensor circuit operates and captures images to generate and output displacement data based on the sensor frame rate.