Abstract: There is provided an optical encoder including an encoding medium, a substrate, a light source and a light sensor. The encoding medium includes an index track and a position track. The light source is arranged at a first surface of the substrate to emit light toward the index track and the position track. The light sensor is arranged at a second surface of the substrate, and has a first light sensing region and a second light sensing region for receiving reflective light respectively from the index track and the position track.

Abstract: A sensing circuit includes: a comparison circuit for comparing an input signal to a corresponding limit threshold; and a control circuit for periodically selecting the limit threshold and sampling a comparison result to execute an interval determination step, thus determining an interval of the input signal. The interval determination step includes steps S100 and S200. Step S100: when the input signal is higher than an ascending upper limit threshold for consecutive plural times, assigning a higher adjacent interval as a following interval; when the input signal is lower than a descending lower limit threshold for consecutive plural times, assigning a lower adjacent interval as a following interval; and executing the interval determination step corresponding to the following interval. Step S200: When no adjacent interval is assigned as the following interval, generating an interval output signal corresponding to the interval and entering the corresponding step S100.

Abstract: A method for calibrating a value of sampling precision of an optical sensor for tracking includes: reading a precision variance and a setting precision value from a memory device; measuring the sampling precision of the optical sensor under a normal mode to generate an actually measured precision value; calculating a normalized value that is proportional to the actually measured precision value according to the precision variance, the actually measured precision value, and the setting precision value; and, calibrating the actually measured precision value by using the normalized value.

Abstract: A method for synchronizing a mouse report rate with a screen refresh rate of a computer includes: utilizing the computer to inform the mouse of a time period of each screen refresh; and adjusting the mouse report rate in accordance with the time period so that an equal integer number of frames will be reported in each screen refresh. Another method includes: determining a screen refresh rate of the computer; setting a target number of frames to be reported to the computer in each screen refresh period; scaling a motion report count of the mouse to generate a post-processed motion report count which corresponds to the target number of frames; and utilizing the post-processed motion report count to add or subtract frames to the number of frames reported during the mouse report period.

Abstract: A method for reporting motion information from an electronic device to a remote host device includes: using an optical sensor for sensing the motion information of the electronic device, the optical sensor being configured within the electronic device; and reporting a motion result of the electronic device to the remote host device based on the optical sensor when the electronic device has moved a predetermined distance each time.

Abstract: A method for determining leading edge location in an image captured by an optical navigation sensor with auto shutter adaptation includes: plotting average pixel values per sensor column on a graph; determining an average value according to the average pixel values as a threshold value; defining a weighted location in the leading half of the captured image according to the threshold value; and determining the leading edge location according to the defined weighted location.

Abstract: An LED current ramping method for an optical mouse includes: determining a speed of the optical mouse; setting control bits according to the determined speed; sending the control bits to a digital circuit of the mouse; and decoding the control bits to selectively open and close switches in a constant current LED driver of the mouse to adjust a current according to the speed.

Abstract: An apparatus includes a lens component and an integrated circuit package. The lens component has a lens and a through hole from a specific surface to a bottom surface of the lens component. The integrated circuit package has a sensor and a second portion on a top surface of the integrated circuit package. The first portion on the bottom surface of the lens component is adjacent and attached to the second portion on the top surface of the integrated circuit package by an adhesive material that is injected via the through hole to the first portion and the second portion, for fixing the lens component to the integrated circuit package.

Abstract: The present invention provides a voltage scaling-up circuit which comprises a charge pump circuit and a multiplexer circuit. The charge pump circuit which includes at least one pumping switch, and is configured to operably periodically converts an input voltage to a pumped voltage onto a pump output node through the at least one pumping switch by charging and pumping, such that the pumped voltage has a scaling factor over the input voltage, wherein the at least one pumping switch has a bulk. The multiplexer circuit senses a predetermined voltage and the pumped voltage and selects one of the predetermined voltage and the pumped voltage which has a higher magnitude as a scaled output voltage at a scaled output node; wherein the bulk of the at least one pumping switch is biased to the scaled output voltage.

Abstract: An image sensor circuit, comprises: a photo sensing circuit including a photo sensitive device for sensing a light signal to generate a photo sensing signal at a photo sensing output node; a charge storage device, coupled to an integration node; an integration switch coupled between the photo sensing output node and the integration node, operating according to an integration control signal; and a reset circuit coupled between a voltage supply and the integration node, operating according to a reset control signal and a read control signal, wherein the integration node includes an integration voltage. In a reset time period, the integration switch is conductive, and the reset circuit generates a reset signal on the integration node to bias the photo sensitive device through the integration switch to an active state and to charge the charge storage device such that the integration voltage is determined to be at a reset level.

Abstract: A non-transitory computer-readable medium storing a program causing a computer to execute an image processing method applied to an image sensing device. The image processing method comprises: (a) comparing a frame delta between a reference frame and a first frame with a predetermined threshold value to generate a first comparing result; (b) comparing a frame rate of the image sensing device with a minimum frame rate and/or a maximum frame rate, to generate a second comparing result; and (c) adjusting one of the frame rate and an offset for a correlation window of the image sensing device, according to the first comparing result and the second comparing result.

Abstract: A media tracking sensor (MTS) apparatus for performing a calibration procedure to determine a resolution calibration factor includes: a full sensor array including: a first virtual array, having a first width, for capturing a calibration reference image; and a second virtual array having a third width equal to the first width, for capturing a plurality of images and comparing the captured images with the calibration reference image. The MTS apparatus further includes a print media positioned below the full sensor array; and a host system for moving the print media below the full sensor array. When the first virtual array captures the calibration reference image, motion data of the full sensor array will be set to zero, and when an image captured by the second virtual array matches the calibration reference image, total motion data will be recorded and used to determine the resolution conversion factor.

Abstract: An optical navigation device for controlling an operation of a pointer on a display apparatus is provided, the optical navigation device includes a device body, a substrate, a light source, an image sensor, and a processing module. The light source, the image sensor, and the processing module are respectively disposed on the substrate. The device body has a housing with an accommodating space formed therein. The substrate is arranged in the accommodating space of the housing. The light source operatively generates a light illuminating a navigation surface of the optical navigation device through the opening of the housing. The image sensor is oriented at a preset angle with respect to a long axis of device body and is configured for capturing images of the navigation surface. The processing module generates a displacement information of the optical navigation device relative to the navigation surface according to the images captured.

Abstract: Disclosed is a circuit for detecting working and resting states for an optical mouse. During each frame capture, a counting unit of the digital logic circuit outputs a first counting signal to turn on a switching transistor, such that the voltage of the pixel capacitor varies from its predetermined voltage, and the counting unit starts to count. The automatic gain control module outputs a second counting signal as the voltage of the pixel capacitor varies one threshold from the predetermined voltage, such that the counting unit stops counting and outputs a counting value. A computing unit computes a difference between the counting value and a reference counting value. The optical mouse is in a resting state if the difference is equal to or smaller than a threshold difference, and otherwise the optical mouse is in a working state.

Abstract: An automatic magnification adjusting method is applied to an optical navigation device. The optical navigation device has an illumination channel, a reference channel and an imaging channel. The reference channel has a reference feature with a known parameter. The automatic magnification adjusting method includes driving the illumination channel and the reference channel to alternatively output a detecting image and a reference image, capturing a series of navigation images consisting of the detecting image and the reference image by the imaging channel, analyzing the reference image to recognize the reference feature, calculating a compensating factor according to a detected parameter of the reference feature, and adjusting magnification of the detecting image by the compensating factor to output corresponding coordinate displacement.

Abstract: The present disclosure illustrates a work mode control method. The work mode control method includes the following steps. First, capturing an image once every capturing interval. Next, determining a shutter time, an average brightness and an image quality in response to the images. The shutter time is associated with a frequency of the optical encoder to capture the images. The average brightness is associated with a brightness of environmental light sensed by the optical encoder. The image quality is associated with clarity of the images. Then, adjusting a work mode of the optical encoder in response to the shutter time, the average brightness and the image quality. Finally, controlling the optical encoder to enter a rest mode when the shutter time is higher than a first threshold, the average brightness is higher than a second threshold, and the image quality is lower than a third threshold.

Abstract: There is provided an optical sensor package including a semiconductor base layer. A first surface of the semiconductor base layer is formed with a pixel array, a plurality of solder balls and an optical component such that when the optical sensor package is assembled with a substrate, the optical component is accommodated in an accommodation throughhole of the substrate so as to reduce the total thickness.

Abstract: There is provided a BJT pixel circuit including a BJT transistor, a photodiode, a first storage capacitor and a second storage capacitor. The first storage capacitor is configured to discharge, via the BJT transistor, to a first output voltage in a first exposure time of the photodiode. The second storage capacitor is configured to discharge, via the BJT transistor, to a second output voltage in a second exposure time of the photodiode.

Abstract: A method for minimizing spurious motion of a mouse includes: determining whether the mouse enters a specific mode; and when the mouse is determined to enter the specific mode, generating a large correlation matrix by generating a standard size correlation matrix multiple times. The multiple standard size correlation matrices are offset with respect to each other so that an edge of each standard size correlation matrix touches at least an edge of another standard size correlation matrix to form the large correlation matrix. The specific mode is a skating mode wherein the mouse will move at high speed over a large area.

Abstract: The present invention discloses an image processing method and an image processing system adopting the same. The method includes the steps of: (a) obtaining a pixel array representing an image; (b) segmenting the pixel array into two or more non-overlapping regions; (c) identifying a capacitor discharging rate of each of the regions; (d) generating a pulse width modulation (PWM) signal when a voltage level dropping of a capacitor exceeds a predetermined threshold; and (e) applying exposure parameters to the regions according to the capacitor discharging rate of the regions, respectively, wherein the exposure parameter applied to one of the regions is different from the exposure parameter applied to at least another one of the regions.