Abstract: An optical pointing device and a method of adjusting an exposure time and a comparison voltage range of the optical pointing device are provided. The optical pointing device obtains a high-resolution image using a low-resolution analog-to-digital (A/D) converter, and calculates a movement value using the obtained image. Thus, the optical pointing device can calculate an accurate movement value, reduce production cost, and provide a rapid operating speed and low power consumption. Further, the optical pointing device can use the A/D converter having a relatively low signal-to-noise ratio of an input signal.

Abstract: Provided are a semiconductor device and a touch sensor device. The semiconductor device includes a die including a sense signal generator for sensing a touch signal to generate a sense signal; a conductive die-attach pad attached to the die to generate the touch signal; and a package for packaging the die and the die-attach pad, wherein the die-attach pad generates the touch signal depending on whether a touch object comes into contact with the package. The touch sensor device includes a plurality of semiconductor devices connected in a daisy-chain communication mode, wherein each of the semiconductor devices includes a die including a sense signal generator for sensing a touch signal to generate a sense signal; a conductive die-attach pad attached to the die to generate the touch signal; and a package for packaging the die and the die-attach pad, wherein the die-attach pad generates the touch signal depending on whether a touch object is brought into contact with the package.

Abstract: An optical pointing device is disclosed. The optical pointing device includes: a case having an opening portion formed on a bottom thereof; a light source installed in the case; an illuminating member for reflecting light emitted from the light source to the exterior through one side of the opening portion of the case; a lens member installed in the case to collect the light which is reflected by the illuminating member and then is reflected from the exterior of the case to enter through the other side of the opening portion; an image sensor installed above the lens member to receive the collected light; and a masking member installed closely to the lens member and having a light collecting hole which exposes a significant surface of the lens member.

Abstract: Provided is an image sensor and optical pointing system using the same. The image sensor has a plurality of pixels, each pixel including a photocell for receiving light and generating an analog signal having a voltage corresponding to a quantity of the received light, a comparator for, in response to a shutter control signal, comparing the analog signal of the photocell with an analog signal of an adjacent pixel to generate a digital signal for movement calculation, or comparing the analog signal of the photocell with a reference voltage to generate a digital signal for shutter control, and a switch for transferring the digital signal for movement calculation and the digital signal for shutter control in response to a pixel selection signal.

Abstract: An apparatus and method for searching and displaying data are provided.

Abstract: Provided are a touch sensor and a method of operating the same. The touch sensor includes: a pulse signal generator for generating a pulse signal of which pulse width is calibrated in response to a control code; a pulse signal transmitter for transmitting the pulse signal when a touch object is out of contact with a touch pad and stopping transmitting the pulse signal when the touch object is in contact with the touch pad; a pulse signal detector for detecting the pulse signal transmitted through the pulse signal transmitter; and a controller recognizing a non-contact state and adjusting the control code to calibrate the pulse width of the pulse signal when the pulse signal detector detects the pulse signal. In the above-described configuration, the contact of the touch object with the touch pad can be sensed more precisely, and the occurrence of a malfunction in the touch sensor due to changed operating conditions can be prevented. As a result, the operating reliability of the touch sensor can be enhanced.

Abstract: Provided is an input device. The input device includes: n first input lines; m groups of n second input lines connected to the n first input lines in different manners, wherein m is larger than n; an input unit having m groups of n touch units correspondingly connected to the m groups of n second input lines; and an input signal determination part for decoding signals from the n first input lines to generate input signals. Therefore, the input device can generate a large number of input signals through a small number of input lines using an electrical touch sensor having a single pressure pad for detecting a contact. In addition, partially using a pressure sensor instead of the touch sensor, it is possible to generate a larger number of input signals.

Abstract: Disclosed are an optical pointing system and method for controlling power and/or clock signal thereof. The optical pointing system includes a movement speed sensing unit for calculating a movement speed using a movement value, a variable power unit for varying a magnitude of power supply voltage according to the calculated movement speed, and a variable clock signal generating unit for adaptively varying an operating speed of a circuit by varying a frequency of a supplied clock signal according to the calculated movement speed. Thus, it is possible to reduce power consumption by adaptively varying the operating speed of the circuit based on the magnitude of the supplied power and/or the frequency of the clock signal according to the movement speed.

Abstract: Provided are an optical pointing apparatus and an automatic gain control (AGC) method thereof. The optical pointing apparatus includes: an image sensor comprised of a plurality of pixels, for receiving light reflected by a work surface, sensing image data, and outputting an electrical signal; an automatic gain control (AGC) unit for receiving the electrical signal, controlling the gain of the electrical signal according to brightness and darkness from images of the work surface and the motion speed of the optical pointing apparatus, and outputting a gain output signal; and an image data processor for receiving the gain output signal, analyzing brightness and darkness from images of the work surface to control the gain of the electrical signal, detecting the motion speed of the optical pointing apparatus to control the gain of the electrical signal, and calculating and outputting the motion speed of the optical pointing apparatus.

Abstract: A time-to-digital converting circuit and a pressure sensing device using the same are provided. The circuit includes: a delay time-varying unit generating a reference signal having a fixed delay time, and a sensing signal having a variable delay time in response to an impedance of an externally applied signal; and a delay time calculation and data generation unit calculating a delay time difference between the reference signal and the sensing signal, and generating digital data having a value corresponding to the calculated delay time difference. Accordingly, the digital data are generated using the delay time varied in response to the externally applied signal, so that the size of the time-to-digital circuit is significantly reduced. In addition, an affect due to external noises is minimized.

Abstract: A pointing device is provided. A sensor generates a motion detection signal by sensing motion. A calculator receives the motion detection signal, calculates a motion value based on the motion detection signal, calculates a conversion motion value base on an angle of the motion value, and outputs the conversion motion value. An interface outputs the motion conversion value inputted from the calculator. By limiting a motion angle, the pointing device can provide a positioning operation suitable for a motion intended by a user. The user can optionally use a motion control method in all directions according to need.

Abstract: The optical pointing device of the present invention includes a light source for emitting light; a mode identifier for outputting an upside-down mode signal when the optical pointing device is used upside-down; an image sensor for receiving reflected light from an object and obtaining image information of the object; a converter for converting the image information into digital image data; a basic motion value calculator for outputting a basic motion value corresponding to a motion of the optical pointing device using the image data; and a motion value converter for receiving the basic motion value and outputting a mirror motion value corresponding to the motion of the object in response to the upside-down mode signal. Thus, the optical pointing device provides the rotation mode, the upside-down mode and the normal mode, so that the optical pointing device is used in various situations and upside-down.

Abstract: An input device for a content providing device and a method of operating the same are provided.

Abstract: A touch sensor and a signal generation method thereof are provided.

Abstract: Provided are an optical pointing device and a data transmission method thereof. The optical pointing apparatus includes: an optical pointing sensing part for receiving an image of a subject to output digital image data and a motion value; an input signal analysis part for receiving a command from the host computer and analyzing the type of the command to output first and second operation control signals; a data input/output controller for outputting the motion value in response to the first operation control signal and outputting the digital image data in response to the second operation control signal; and a computer interface for receiving the motion value and the digital image data having different data transmission protocols to directly transmit the value and the data to the host computer.

Abstract: An optical position tracking device and a method of testing the same are provided. The device includes: a controller for generating at least one test operation signal in response to a command signal; a test signal generator for generating a test signal during a test operation in response to the test operation signal; a motion calculator for receiving the test signal during the test operation and performing operations in response to the test operation signal to output an output signal; and an output signal analyzer for determining whether the output signal is correct during the test operation in response to the test operation signal to output a result signal. Thus, the complexity of the method of testing the optical position tracking device can be markedly reduced and it is unnecessary to employ a high-performance test apparatus.

Abstract: An optical pointing device and a power supply semiconductor device therefore are provided. The optical pointing device includes: an optical unit for irradiating light to an object using a light source and receiving light reflected by the object to output an optical image; a motion sensor for receiving the optical image, sensing image data, and calculating a motion value to output the motion value; a moving velocity sensor for receiving the motion value and calculating a moving velocity of the optical pointing device to output the moving velocity; and a variable power supply for generating a different power supply voltage according to the moving velocity. The optical pointing device can generate different optimum power supply voltages required for respective internal blocks and variably apply a power supply voltage according to the moving velocity. Thus, the supply of unnecessary power is cut off, thereby preventing waste of power.

Abstract: Provided are an optical navigation device and a method for compensating for an offset in the optical navigation device. The optical navigation device includes: an image input unit for emitting light, receiving light reflected from a working surface to generate an analog image signal, converting the analog image signal into a digital image signal, and outputting the digital image signal; a delta image generator for generating a cumulative average of digital image signals of respective pixels and subtracting the cumulative average from the digital image signals in the respective pixels to generate a delta image signal; and a motion value calculator for calculating a motion value using the delta image signal.

Abstract: Disclosed is an optical pointing system, a signal transmission method of the same, and a signal processing method of a computer used in the optical pointing system. The optical pointing system comprises an image sensor for outputting an analog signal corresponding to a surface image, a signal conversion section for converting the analog signal of the image sensor into a digital image signal, a movement value calculation circuit for calculating a movement value using the digital image signal of the signal conversion section and outputting the calculated movement value, and a computer interface for receiving the digital image signal and the movement value and transmitting the digital image signal and the movement value to a computer. Thereby, an image signal of a worktable surface on which the optical pointing system is placed can be processed at not only the optical pointing system but also the computer, so that it is possible to calculate the accurate movement value of the optical pointing system.

Abstract: Provided are an apparatus using a battery and a method of detecting a time to change/recharge the battery in the apparatus.