Abstract: An apparatus for determining signal power comprise an oscillating circuit and a determining circuit. The oscillating circuit generates an oscillating signal. When a to-be-detected signal has signal power greater than a threshold, the oscillating signal has a first frequency; when the signal power is smaller than the threshold, the oscillating signal has a second frequency. The determining circuit determines whether the oscillating signal has either the first frequency or the second frequency, and generates a determination result accordingly.

Abstract: A transceiver in-phase and quadrature (IQ) calibration method is provided. When calibrating the transceiver, an adjusting unit is connected to an output terminal of a transmitter to receive a first radio-frequency (RF) signal. The adjusting unit adjusts a phase delay of the first RF signal to generate a second RF signal to be inputted to an input terminal of a receiver. Through adjusting the phase delay of the first RF signal, both the transmitter and the receiver can be calibrated at the same time.

Abstract: A stereoscopic camera module includes two lens modules, a light guide assembly, an image sensor, and a processor. Each lens module includes a shutter and at least one lens. The light guide assembly includes two inlets and an outlet, the two inlets are hermetically sealed by the two lens modules. External light rays enter into the two inlets from the two lens modules respectively and project from the outlet. The image sensor is position at the outlet of the light guide assembly and configured for capturing images. The processor is configured for controlling the shutters to open in quick succession and composing a left image and a right image alternately captured by the image sensor to a stereoscopic image.

Abstract: A lens module includes a barrel, a first lens, a second lens, and a spacer. The first lens and the second lens are received in the barrel from an object side to an image side of the lens module. Each lens includes an optical portion and a non-optical portion around the optical portion. The spacer is positioned between the non-optical portion of the first lens and the non-optical portion of the second lens. The second lens includes an image-side surface. The non-optical portion on the image-side surface includes a contact portion. The contact portion defines a triangular notch.

Abstract: A driving circuit and a gray insertion method of a liquid crystal display (LCD) are provided. The gray insertion method includes analyzing whether a current frame belongs to a dynamic frame or a static frame. When the current frame belongs to a dynamic frame, charging time of a gray insertion image is extended. When the current frame belongs to a static frame, the charging time of a gray insertion image is shortened. As a result, motion blur on the LCD can be reduced and image quality can be increased.

Abstract: A phase-locked loop (PLL) including an active filter, a voltage-controlled oscillator (VCO), two phase detectors, a charge pump and a digital-to-analog converter (DAC) is provided. The VCO generates an oscillation signal according to a control signal provided at an output of the active filter. The first phase detector generates a phase difference signal according to a reference signal and a feedback signal associating with the oscillation signal. The charge pump provides a charging current to a first input of the active filter according to the phase difference. The second phase detector generates a digital reference signal according to the phase difference between the reference signal and the feedback signal. The DAC converts the digital reference signal to an analog reference voltage and provides the analog reference voltage to the second input of the active filter.

Abstract: A phase-locked loop (PLL) includes a charge pump, a frequency divider, a voltage detector, a control module, and a calibration module. When a predetermined current amount and a predetermined frequency dividing amount are provided, the voltage detector measures a voltage associated with an output frequency of the PLL to generate a first reference voltage. When a test current amount and the predetermined frequency dividing amount are provided, the voltage detector again measures the voltage to generate a second reference voltage. When the predetermined current amount and a test frequency dividing amount are provided, the voltage detector again measures the voltage to generate a third reference voltage. The control module estimates a loop gain of the PLL according to the current amounts, the frequency dividing amounts and the reference voltages. The calibration module calibrates the PLL according to the loop gain.

Abstract: A lens module includes a barrel, a first lens, a second lens, a third lens, and two spacers. The first lens, the second lens, and the third lens are received in the barrel from an object side to an image side of the lens module. Each lens includes an optical portion and a non-optical portion around the optical portion. The two spacers are respectively positioned on the non-optical portions of two adjacent lenses. The non-optical portion of the second lens includes a first contact portion and two second contact portions. The first contact portion contacts an inner sidewall of the barrel. The second contact portions respectively contact the first lens and the third lens and are arranged in an acute angle with respect to an optical axis of the lens module. The non-optical portion of the second lens excluding the first contact portion and the second contact portions is nebulized.

Abstract: A time controller with power-saving function is utilized for selecting to drive a display with progressive or interlace scan method based on if two continuous frames are dynamic. The time controller comprises an interlace scan control module, a progressive scan control module, a motion detecting circuit, a scan selecting circuit, and a data selecting circuit. The interlace scan and the progressive scan control modules are utilized for generating control signals of interlace scan and progressive scan according to a video signal, respectively. The motion detecting circuit select the control signals of interlace scan or progressive scan based on if the two continuous frames are dynamic, so as to drive the display. In this way, consumed power of the display is saved and a saw-tooth effect on the video frame is avoided.

Abstract: A lens module includes a barrel, a first lens, a second lens, and a spacer. The first lens and the second lens are received in the barrel from an object side to an image side of the lens module. Each lens includes an optical portion and a non-optical portion around the optical portion. The spacer is positioned between the non-optical portion of the first lens and the non-optical portion of the second lens. The second lens includes an image-side surface. The non-optical portion on the image-side surface includes a contact portion. The contact portion defines a triangular notch.

Abstract: A lens module includes a barrel, a first lens, a second lens, a third lens, and two spacers. The first lens, the second lens, and the third lens are received in the barrel from an object side to an image side of the lens module. Each lens includes an optical portion and a non-optical portion around the optical portion. The two spacers are respectively positioned on the non-optical portions of two adjacent lenses. The non-optical portion of the second lens includes a first contact portion and two second contact portions. The first contact portion contacts an inner sidewall of the barrel. The second contact portions respectively contact the first lens and the third lens and are arranged in an acute angle with respect to an optical axis of the lens module. The non-optical portion of the second lens excluding the first contact portion and the second contact portions is nebulized.

Abstract: A direct conversion receiver including a mixer, a measuring module and a calibration module is provided. When the calibration module adjusts the switch duty cycle of the mixer to being shorter than a standard duty cycle, a first second-order inter-modulation distortion is measured. When the calibration module adjusts the switch duty cycle to being longer than the standard duty cycle, a second second-order inter-modulation distortion is measured. According to the measured distortions, the calibration module determines a calibration signal and provides the calibration signal to the mixer, so as to allow the mixer to have a calibrated duty cycle.

Abstract: An image capturing device includes a housing defining an aperture, a first lens module arranged inside the housing, a second lens module arranged inside the housing, and a light reflection assembly aligned with the aperture. The first lens module and the second lens module are positioned at opposite sides of the aperture. The light reflection assembly includes a reflecting mirror. The light reflection assembly is rotatable between a first position where the reflecting mirror reflects light from the aperture towards the first lens module and a second position where the reflecting mirror reflects light from the aperture towards the second lens module.

Abstract: An electronic device includes a main body and an image capturing device positioned on the main body. The image capturing device includes a fixing pole, a rotating plate, two lens modules, and an image sensor. The fixing pole is fixed on the main body. The rotating plate is sleeved over the fixing pole and rotates around the fixing pole. The two lens modules are mounted on the rotating plate and symmetrical with the fixing pole. The image sensor is arranged on the main body. The rotating plate is rotated to make the two lens modules be alternated to align with the image sensor.

Abstract: A driving circuit and a gray insertion method of a liquid crystal display (LCD) are described. In the gray insertion method, whether a dynamic frame or a static frame display by the LCD is determined. When the LCD displays the dynamic frame, a gray insertion level of a frame of the display and a duty cycle of a pulse width module (PWM) signal are increased synchronously, wherein the PWM signal drives a back light module of the display. When the LCD displays the static frame, the gray insertion level of a frame of the display and the duty cycle of the PWM signal are decreased synchronously. As a result, a motion blur on LCD is reduced and luminance of a display frame is maintained.

Abstract: A camera module includes an optical assembly, an image sensor, a barrel holder, an angle measurement assembly, a perpendicularity adjustment assembly and a controller. The optical assembly has an optical axis. The image sensor has a light surface. The optical assembly and the image sensor are housed in the barrel holder. The angle measurement assembly is configured for measuring perpendicularity of the optical axis to the light sensing surface of the image sensor. The perpendicularity adjustment assembly is arranged between the optical assembly and the barrel holder, and includes an electrostrictive member deformable in response to a voltage, thereby adjusting the perpendicularity of the optical axis to the light sensing surface. The controller is configured for providing the voltage to the perpendicularity adjustment assembly to deform the electrostrictive member.

Abstract: A phase locked loop (PLL) includes a clock generating circuit, a first phase detecting circuit, a first loop filter, a first VCO, a first mixer and a control circuit. The clock generating circuit generates a first clock signal. The first phase detecting circuit detects a phase difference between an input data signal and a feedback signal and generates a detection output signal according to the phase difference. The first loop filter, coupled to the first phase detecting circuit, generates a first VCO control signal according to the detection output signal. The first mixer, coupled to the first VCO and the clock generating circuit, mixes the output data signal and the first clock signal to generate the feedback data signal. The control circuit, coupled to the clock generating circuit and the first loop filter, for adjusting the first clock signal according to the first VCO control signal to calculate a gain of the first VCO.

Abstract: A lens module includes a lens and a lens barrel receiving the lens therein with a gap maintained between a peripheral surface of the lens and an inner surface of the lens barrel. The lens barrel includes a plurality of hole portions with through holes defined therein and facing the peripheral surface of the lens, and a glue applied in the gap to adhere the lens to the hole portions.

Abstract: A mold for fabricating an optical fiber connector is provided. The mold includes a mold body, a core pin and a positioning block. The mold body defines a molding chamber, and the molding chamber has a lens forming portion for forming a lens. The core pin is configured for insertion into the molding chamber and forming an optical fiber insertion hole. The core pin includes a first portion and a second portion thinner than the first portion. The positioning block is configured for being arranged in the molding chamber. The positioning block includes an engaging hole for engagingly receiving the second portion.

Abstract: A phase-locked loop (PLL) includes a charge pump, a frequency divider, a voltage detector, a control module, and a calibration module. When a predetermined current amount and a predetermined frequency dividing amount are provided, the voltage detector measures a voltage associated with an output frequency of the PLL to generate a first reference voltage. When a test current amount and the predetermined frequency dividing amount are provided, the voltage detector again measures the voltage to generate a second reference voltage. When the predetermined current amount and a test frequency dividing amount are provided, the voltage detector again measures the voltage to generate a third reference voltage. The control module estimates a loop gain of the PLL according to the current amounts, the frequency dividing amounts and the reference voltages. The calibration module calibrates the PLL according to the loop gain.