Abstract:
An optical mouse of a dynamic range has an analog/digital (A/D) converter having an input range adjusted based on an input range control signal, the A/D converter receiving an input signal over the adjusted input range and converting the received signal into digital data, and an image data processor for determining on the basis of image data from the A/D converter whether a data concentrated distribution has occurred, detecting a level of the input range with the data concentrated distribution upon determining that the data concentrated distribution has occurred, outputting the input range control signal to the A/D converter according to the detected level and processing the image data from the A/D converter to detect motion data therefrom.
Abstract:
Provided are a capacitance measurement circuit and method. In the capacitance measurement circuit and method, a control unit generates a control code a predetermined number of times according to designated rules regardless of the level of a sensing signal, and the control code is changed to measure a capacitance value when the level of the sensing signal corresponding to the generated control code is determined to be normal. Consequently, the measured capacitance value is hardly affected by noise and can be stably output.
Abstract:
Provided are a touch panel capable of detecting a multi-touch and a multi-touch detecting method thereof. Since the touch panel and the multi-touch detecting method thereof can measure and store each resistance of a plurality of first and second touch pads varied depending on the touch position of a contact object and capacitance of the contact object using a variation in detection time to determine an actual touch position of the contact object, it is possible to determine the actual touch position even when a ghost pattern occurs.
Abstract:
Provided is an optical navigation device and a method of operating the same. The optical navigation device includes: a light source for irradiating light; an image sensor for collecting incident light to obtain an image; and a controller for performing a calculation mode that obtains an image when the light source is ON to calculate a movement value and determines whether the optical navigation device is moved on the basis of the movement value, a sleeping mode that turns OFF the light source and stops an operation of the image sensor, and a detection mode that obtains the image when the light source is ON and an image when the light source is OFF and then compares characteristics of the images to determine whether the optical navigation device is separated from the work surface, wherein the controller performs the calculation mode when the optical navigation device is moved and not separated from the work surface, performs the sleeping mode when not moved and separated from the work surface, and periodically performs the detection mode. Therefore, it is possible to precisely detect whether the optical navigation device is spaced apart from a work surface to prevent malfunction and unnecessary power consumption of the optical navigation device due to separation from the work surface.
Abstract:
Provided are an apparatus using a battery and a method of detecting a time to change/recharge the battery in the apparatus. The apparatus includes: a battery for applying a battery voltage; a function unit for receiving the battery voltage to perform an intrinsic operation and cutting off the battery voltage; a voltage divider for dividing the battery voltage to generate a divided voltage; an analog-to-digital converter (ADC) for receiving the battery voltage to convert the divided voltage into a digital voltage signal in response to a measurement control signal before and after a low-power mode is finished; and a controller for receiving the battery voltage to generate a low-power signal for entering the low-power mode, enabling the measurement control signal in response to the low-power signal before and after the low-power mode is finished, and informing a user of a time to change/recharge the battery by detecting the remaining power of the battery using the digital voltage signals generated before and after the low-power mode is finished.
Abstract:
Provided are an automatic impedance adjuster and a control method thereof. The automatic impedance adjuster includes: a pulse signal generating part for generating a pulse signal having a pulse width varied in response to a pulse width control signal; a signal processing part including a plurality of channels having a plurality of first input sensors and a pulse width correction channel having a second input sensor, not outputting the pulse signal when a touch object is in contact with the first and second input sensors, and outputting the pulse signal when the touch object is not in contact with the first and second input sensors; and a controller for outputting a non-contact state when the pulse signal is detected and outputting a contact state when the pulse signal is not detected during a normal mode, entering an automatic impedance adjustment mode to control the pulse width control signal when a pre-determined time elapses, and entering the automatic impedance adjustment mode to control the pulse width control signal when the pulse signal is not detected through all the plurality of channels or the pulse width correction channel. The automatic impedance adjuster includes a specific channel for checking an operating environment. When an operation signal of the specific channel is detected or operation signals of all the channels are detected, the automatic impedance adjustment operation is performed to prevent malfunction of the impedance adjustment operation. In addition, malfunction of a touch sensor due to variation of the operating environment can be prevented to improve operating reliability of the touch sensor.
Abstract:
Provided are a touch pad device and a method of detecting a contact position thereof. The touch panel device includes: a touch panel having a surface on which at least one pair of touch patterns formed of a conductive material are formed; and a touch sensor for generating a contact signal corresponding to a contact position of a contact object using impedances of a pair of touch patterns when the pair of touch patterns are contacted by the contact object. The touch panel device includes a plurality of pairs of touch patterns formed of a conductive material. A first axis position of a contact object is determined depending on whether or not the touch patterns are contacted by the contact object, and a second axis position of the contact object is determined by detecting variations in capacitance of the touch patterns or delay times by which a reference signal applied to the touch patterns is delayed. Thus, a contact position of the contact object can be detected using the first and second axis positions. Since the touch panel uses a one-layer ITO film, manufacturing the touch panel device with improved transparency can be easy and economical.
Abstract:
A wireless communication system and a channel changing method thereof are provided. The wireless communication system which includes a plurality of channels, uses one of the plurality of channels as a specific channel, and uses another channel of the plurality of channels as a communication channel, includes: a base terminal for obtaining the one of the plurality of channels as an alternative channel, generating a channel change command including information on the alternative channel, and transmitting the command on a specific channel, when there is a data error received on the communication channel; and a wireless input device for resetting the alternative channel as a new communication channel and performing wireless communication on the communication channel which was reset, after obtaining the information on the alternative channel by receiving the channel change command from the specific channel. Accordingly, the base terminal can obtain the alternative channel by quickly sensing the channel cross talk so that a channel change can be performed immediately and actively, thereby enhancing the reliability and efficiency of the wireless communication.
Abstract:
Provided are an electronic device and a method of arranging a touch panel thereof. The electronic device includes: a display panel for displaying an image; a touch panel including a cover and a plurality of electrodes adhered to the cover; and a sensing unit including a plurality of digital contact controllers for detecting delays caused by variations of capacitances of the electrodes to output digital data signals. Thus, the electronic device includes an economical touch panel that can be variously applied according to users' convenience or purpose without using an expensive substrate having the entire surface coated with an ITO layer.
Abstract:
Provided are a sensor device and a method of operating the same. The sensor device includes a plurality of semiconductor devices connected in series. When a semiconductor device does not sense a state of contact with an object and receives first sensing data from a preceding semiconductor device, the semiconductor device outputs the first sensing data to a succeeding semiconductor device. When the semiconductor device senses the state of contact with the object and receives the first sensing data from the preceding semiconductor device, the semiconductor device generates second sensing data and outputs the first and second sensing data to the succeeding semiconductor device. When the semiconductor device senses the state of contact with the object and does not receive the first sensing data from the preceding semiconductor device, the semiconductor device generates the second sensing data and outputs the second sensing data to the succeeding semiconductor device. The method includes the steps of: generating, by at least one semiconductor device for generating a sense signal, identification (ID) information, storing and outputting the ID information to the succeeding semiconductor device after a supply voltage is initially applied to the semiconductor device; outputting first sensing data to the succeeding semiconductor device when a state of contact with an object is not sensed and the first sensing data is received from a preceding semiconductor device; generating second sensing data when the state of contact with the object is sensed, and outputting the first sensing data and the second sensing data when the first sensing data is received from the preceding semiconductor device; and outputting the second sensing data when the first sensing data is not received from the preceding semiconductor device.