ATLAB INC. Patent applications |
Patent application number | Title | Published |
20130290761 | METHOD OF AND APPARATUS FOR PROCESSING TOUCH SIGNAL BY TOUCH SENSOR CONTROLLER - Provided are an apparatus and method by which a touch sensor controller of a touch screen apparatus may efficiently process a touch signal in response to a touch event to reduce power consumption of the entire system. An apparatus including a touch screen includes a touch sensor controller configured to generate a touch signal in response to a touch event and process the touch signal and a system controller configured to receive the touch signal from the touch sensor controller and perform an operation in response to the touch signal. The touch sensor controller determines whether the touch event is a multi-touch, generates touch signals having different types depending on whether the touch event is the multi-touch, and transmits the touch signals to the system controller. Thus, power consumption of the apparatus including the touch screen may be efficiently reduced. | 10-31-2013 |
20130214798 | CAPACITANCE MEASUREMENT CIRCUIT AND METHOD FOR MEASURING CAPACITANCE THEREOF - 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. | 08-22-2013 |
20130207934 | INPUT DEVICE AND TOUCH POSITION DETECTING METHOD THEREOF - Provided are an input device and a touch position detecting method thereof. The input device includes a touch panel part configured to output a measurement value according to a touch position of a touch object; and a touch position detecting part configured to generate a raw frame based on the measurement value and generate at least one cluster with reference to a cell having a maximum value in the raw frame, wherein, when there is an overlapped cell simultaneously included in a plurality of clusters, the touch position detecting part performs a clustering operation of dividing a value of the overlapped cell into values of the plurality of clusters according to values of cells adjacent to the overlapped cell and generating the at least one cluster, and calculates coordinates of the touch position with respect to each of the at least one cluster. | 08-15-2013 |
20130134995 | TOUCH SENSOR AND OPERATING METHOD THEREOF - A 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. | 05-30-2013 |
20120200530 | INPUT DEVICE, AND METHOD FOR DETECTING THE CONTACT POSITION OF THE DEVICE - Provided are an input device and a touch position detecting method thereof The input device includes a touch panel configured to generate a plurality of different measurement values depending on touch positions and output the plurality of measurement values, a clustering part configured to receive the measurement values, and output clustered measurement values including at least one cluster from the plurality of measurement values using a threshold value, and a center point calculating part configured to receive the clustered measurement values, and calculate coordinates of each cluster using a weighted average to output the coordinates. | 08-09-2012 |
20120194476 | TOUCH PANEL CAPABLE OF MULTI-TOUCH SENSING, AND MULTI-TOUCH SENSING METHOD FOR THE TOUCH PANEL - 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. | 08-02-2012 |
20120146944 | INPUT APPARATUS AND METHOD FOR DETECTING THE CONTACT POSITION OF INPUT APPARATUS - Provided are an input device and a touch position detecting method thereof. The input device includes a touch panel having a plurality of first touch patterns, each of which is disposed in a first direction and outputs a first touch signal at a touch position of the first direction, and a plurality of second touch patterns, each of which is disposed in a second direction perpendicular to the first direction and outputs a second touch signal at a touch position of the second direction, and a touch sensor, where the touch sensor calculates a coordinates of touch position based on the first and second touch signals and storing the coordinates of touch position according to time, wherein the touch sensor performs a first sensing operation of detecting a coordinates of real touch position using the coordinates of touch position previously stored when the number of the touch position is at least two and a time difference between the at least two touch positions is greater than a reference value and performs a second sensing operation of detecting a coordinates of real touch position using an impedance of the touch pattern which vary depending on the touch position when a number of the touch position is at least two and the elapsed time between touching of the at least two touch positions is smaller than or equal to the reference value. | 06-14-2012 |
20120007832 | TOUCH SENSOR DEVICE - A touch sensor device includes first touch pads, each of which is connected with a first bar-type touch pattern and a second bar-type touch pattern by a plurality of bridges and is disposed in a first direction, the first and second bar-type touch patterns being connected with first and second channels at opposite ends thereof and third and fourth channels at opposite ends thereof respectively, second touch pads, each of which is connected with fifth and sixth channels at opposite ends thereof respectively and is disposed in a second direction perpendicular to the first direction, and a touch sensor sequentially applying reference signals to the second and fourth channels of the first touch pads, performing resistor-type and capacitor-type touch sensing using resistance and capacitance values varied depending on the touch location of a touch object, and generating touch location data corresponding to the touch location. | 01-12-2012 |
20110227823 | PUCK-TYPE POINTING APPARATUS, POINTING SYSTEM, AND POINTING METHOD - Provided are a puck-type pointing device, a pointing system including the same, and a pointing method thereof. The puck-type pointing device includes a movement detection unit detecting information regarding touch and movement of a puck by a touch object and outputting a movement detection signal, a first signal processing unit receiving the movement detection signal, removing noise, and outputting a first puck movement signal after a first period of time, a second signal processing unit receiving the movement detection signal, removing noise, and outputting a second puck movement signal after a second period of time which is shorter than the first period of time, and a puck movement signal transmitting unit transmitting or cutting off the first puck movement signal according to the movement information in response to the second puck movement signal. | 09-22-2011 |
20110210934 | TOUCH PANEL, AND INPUT DEVICE INCLUDING THE SAME - Provided are a touch panel and an input device. The touch panel includes a plurality of first touch pad groups disposed in a first direction and having a plurality of first touch pads disposed in the first direction and extending in a second direction. Here, the first touch pads disposed at the same position in the respective first touch pad groups are connected in common with a corresponding one of a plurality of first channels, a first input signal is applied to one of the first touch pads of each first touch pad group, and the first touch pads receiving the first input signal are connected with the first channels, respectively. | 09-01-2011 |
20110199327 | TOUCH SENSOR DEVICE - A touch sensor device is provided. The touch sensor device includes a touch panel including a plurality of touch mark-keys indicating a position touched by a touch object, a plurality of first touch pads disposed at positions corresponding to the plurality of touch mark-keys of the touch panel and generating touch information of the touch object as a first electrical signal, a plurality of second touch pads disposed between the plurality of first touch pads and generating touch information of a conductive material on the touch object as a second electrical signal, and a touch sensing unit receiving the first electrical signal, outputting a plurality of sensing signals to allow an electronic device to perform predetermined operations corresponding to the touched touch mark-keys, and determining whether the touch of the touch object is a normal one using the first and second electrical signals. | 08-18-2011 |
20110175626 | PORTABLE DEVICE WITH PROXIMITY SENSORS - A portable device with a proximity sensor is provided. The portable device with a proximity sensor of the present invention includes a shielding plate for shielding impedance applied in a direction opposite to the direction that the proximity sensor detects the proximity such that the proximity sensor is not affected by a change in the surrounding environment and can detect the proximity at the same sensitivity at all times. Moreover, when the portable device is placed upside down on a conductive surface that causes low impedance, a proximity sensor placed adjacent to the conductive surface is deactivated to prevent malfunction. | 07-21-2011 |
20110156800 | SENSOR, SENSING METHOD THEREOF, AND FILTER THEREFOR - A sensor, a sensing method of the sensor, and a filter of the sensor are provided. The sensor includes a sensing data output unit configured to output sensing data that varies depending on touch or proximity of an object, and a determiner configured to compare a threshold value with the sensing data to recognize touch or proximity, vary a first strength value indicating the sensing data in a state of no touch or no proximity and a second strength value indicating the sensing data in a state of touch or proximity, vary the threshold value using the first and second strength values, and output an output signal indicating touch or proximity. | 06-30-2011 |
20110102353 | TOUCH PANEL APPARATUS AND A METHOD FOR DETECTING A CONTACT POSITION ON THE SAME - A touch panel device and a method for detecting a contact position are provided. The touch panel device includes a touch panel including a first touch pattern, the first touch pattern having a plurality of first touch pads connected in series; and a touch sensor for applying a clock signal to one terminal of the first touch pattern, receiving a first delayed clock signal from the other terminal of the first touch pattern, and generating contact position data corresponding to a contact position of an object using a difference in delay time between the clock signal and the first delayed clock signal. Thus, since the plurality of touch pads are connected in series, the contact position of the entire touch panel can be sensed with only one touch sensor, and the touch pad has a greater area than the connection line for a distinguished difference in resistance between the touch pad and the connection line, such that the contact position can be accurately detected. | 05-05-2011 |
20110050638 | TOUCH SENSOR DEVICE AND THE METHOD OF SWITCHING OPERATION MODE THEREOF - Provided are a touch sensor device and a method of switching an operation mode in the touch sensor. The touch sensor device includes a touch panel for receiving an input signal generated by a touch on a surface of the touch panel and generating a touch signal on the basis of a change in internal capacitance; and a touch sensor chip for receiving the touch signal, calculating touch information, generating sense data, comparing the sense data with previously stored pattern signals, and controlling the touch sensor device to perform an operation corresponding to the received input signal. | 03-03-2011 |
20110037727 | TOUCH SENSOR DEVICE AND POINTING COORDINATE DETERMINATION METHOD THEREOF - Provided are a touch sensor device and a pointing coordinate determination method thereof. The touch sensor device includes a touch panel, a touch sensing unit that receives a touch signal, senses touch information according to a simple touch or touch strength of a touch object, and outputs an electrical signal, a touch data storage that stores touch data in response to the electrical signal, a template storage that pre-stores templates for various outlines of the touch object in response to the electrical signal, and a touch data processor that senses an outline of the touch object according to a distance difference related to the touch object by receiving the touch data, and determines pointer coordinates of a pointing device by receiving and mapping a stored template of the touch object. | 02-17-2011 |
20110035632 | COMMUNICATION SYSTEM WITH AUTOMATIC RESTORING FUNCTION AGAINST FAULTY OPERATION AND RESTORING METHOD THEREOF - Provided are a communication system and a method of restoring the communication system. The communication system includes a master device for transmitting a reference clock through a clock line, transmitting and receiving data through a data line, and requesting and receiving input data and error detection data, and a slave device for detecting human touch input data, transmitting and receiving the data in synchronization with the reference clock or generating and transmitting the input data, and transmitting the error detection data in response to the request for error detection data. Here, the master device compares stored error detection data with the received error detection data and initializes the slave device when the stored error detection data is not the same as the received error detection data. Therefore, in the master-slave communication system capable of automatic restoration from a malfunction and the method of restoring the communication system, a master device recognizes malfunction of a slave device having a volatile storage due to its surroundings, initializes the slave device, and thus can restore the slave device to its normal operating state. | 02-10-2011 |
20110025635 | TOUCH AND PROXIMITY SENSITIVE DISPLAY PANEL, DISPLAY DEVICE AND TOUCH AND PROXIMITY SENSING METHOD USING THE SAME - A touch and proximity sensitive display panel, a display device, and a touch and proximity sensing method using the same are disclosed. The display panel includes a plurality of pixels arranged in a matrix form, a pixel substrate having a pixel electrode arranged in an image output direction, a common substrate having a common electrode arranged at a position facing the pixels, and a panel controller that identifies touch and proximity positions of a touch object by sensing electrostatic capacitances of the pixel electrodes through the data lines in a touch-sensing mode. The display panel can sense the touch and proximity of the touch object without an additional touch screen. | 02-03-2011 |
20100327953 | AUTOMATIC IMPEDANCE ADJUSTER AND CONTROL METHOD THEREOF - 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. | 12-30-2010 |
20100277433 | TOUCH PANEL DEVICE AND METHOD OF DETECTING CONTACT POSITION THEREOF - 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. | 11-04-2010 |
20100225579 | IMAGE SENSOR AND OPTICAL POINTING SYSTEM - Provided is an optical pointing system. The optical pointing system has an image sensing unit for receiving light and generating a plurality of first analog signals corresponding to a quantity of the received light in response to a reset signal and a pixel selection signal, at least one pixel for shutter control for receiving light, each of the pixel for shutter control generates a second analog signal corresponding to a quantity of the received light, a first comparator for comparing voltages of the plurality of first analog signals to generate a first comparison digital signal in response to a shutter control signal, an image processor for receiving the first comparison digital signal to calculate a movement value of the optical pointing system, and a shutter control unit for generating the shutter control signal based on the at least second analog signal. | 09-09-2010 |
20100212975 | TOUCH SENSOR AND OPERATING METHOD THEREOF - 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. | 08-26-2010 |
20100188360 | ELECTRONIC DEVICE AND METHOD OF ARRANGING TOUCH PANEL THEREOF - 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. | 07-29-2010 |
20100188359 | TOUCHPAD COMPRISING STRUCTURE FOR TACTILE SENSATION AND TOUCH SENSOR USING THE SAME - Provided are a touchpad and a touch sensor using the same. The touchpad includes: a printed circuit board (PCB); a plurality of conductors; and a non-conductive board disposed on one surface of the PCB and having a plurality of protrusions respectively including the conductors therein. In addition, the touch sensor includes: the touchpad; and a contact signal generation unit having a plurality of digital contact controllers for sensing delay due to a change in impedance between the conductors in the protrusions and the PCB and outputting a digital signal according to the delay. An apparatus having the touchpad as an input device enables a user to feel the touchpad better. | 07-29-2010 |
20100072916 | TOUCH SENSOR DEVICE - Provided is a touch sensor device including: at least one terminal connected to at least one contact pad; at least one common terminal; at least one light emitter connected between the common terminal and the terminal; and a touch sensor and light-emission controller unit connected to the common terminal and the terminal, and when a touch is sensed by the contact pad, controlling a corresponding light emitter to emit light. | 03-25-2010 |
20100006349 | SENSOR DEVICE AND METHOD OF OPERATING THE SAME - 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. | 01-14-2010 |
20100001956 | HANDHELD TERMINAL - Provided is a handheld terminal. The handheld terminal includes a case having a through-hole formed at one side thereof; and an optical module constituted by a circuit board in which a light source for irradiating light and a sensor for receiving the light are installed, a lens disposed at one side of the circuit board and inserted into the through-hole, and a support bracket disposed at the other side of the circuit board. Therefore, it is possible to uniformly maintain the height of the sensor for receiving light based on the thickness of the lens to maintain a certain depth of focus. | 01-07-2010 |
20090289171 | OPTICAL POINTING DEVICE - An optical pointing device is provided. The optical pointing device includes an image sensor including a photocell array including a plurality of photocells for sensing light and generating an analog signal corresponding to the light, the image sensor sequentially outputting analog signals from the plurality of photocells, a comparator for comparing the signals output from the image sensor to generate a relative comparative signal, and comparing at least one signal output from the image sensor with a comparative signal to generate an absolute comparative signal, and a controller for outputting motion data using the relative comparative signal and outputting a shutter control signal using the absolute comparative signal. The optical pointing device does not include an A/D converter or a pre-filter circuit, thus reducing a chip size of a semiconductor integrated circuit, unlike a conventional optical pointing device. Furthermore, the optical pointing device can obtain high-quality image data and accordingly accurate motion data of an object, by using the comparator having the offset removal and the offset correction circuit external to the image sensor. Also, the use of the second photocell separate from the image sensor can reduce data computational complexity of the shutter control signal controller in the image processor, thus reducing current consumption in the image processor. | 11-26-2009 |
20090267899 | OPTICAL SENSOR MODULE FOR OPTICAL POINTING DEVICE AND METHOD OF FABRICATING THE SAME - An optical sensor module for an optical pointing device and a method of fabricating the same are provided. The optical sensor includes: a lead frame having a light receiving hole formed in a pad; an image sensor attached to the pad and detecting light emitted from a light source through the light receiving hole; and a molding member for integrally molding the lead frame and the image sensor. The method includes: forming a light receiving hole in a pad of a lead frame; attaching an image sensor to the pad; connecting the image sensor to a lead of the lead frame by bonding using a wire; molding the lead frame and the image sensor; and trimming the lead of the lead frame to a certain length and forming the lead. | 10-29-2009 |
20090152022 | SEMICONDUCTOR DEVICE AND TOUCH SENSOR DEVICE - 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. The semiconductor device enables the size and position of a touch pad to be known in advance during the fabrication of a die so that a sensitivity adjusting process can be simplified. Also, since the touch pad is included in a touch sensor, a system can be simply configured at low cost. Furthermore, the touch sensor device requires no additional sensitivity adjusting process and enables a plurality of touch sensor systems to be constructed at low cost by simply connecting a small number of electrical signals. | 06-18-2009 |
20090140981 | IMAGE SENSOR AND OPTICAL POINTING SYSTEM - 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. The optical pointing system includes a reference voltage generation unit for generating a reference voltage, the image sensor, a signal selector for receiving the digital signal for movement calculation and the digital signal for shutter control, and selecting and outputting one of the digital signal for movement calculation and the digital signal for shutter control in response to a shutter control period selection signal, a movement calculation and shutter control unit for receiving the digital signal for movement calculation to obtain an image of an object and output a movement value of the optical pointing system and the shutter control period selection signal, and receiving the digital signal for shutter control to compare a high-level count value with a maximum count value and a minimum count value and output the shutter control signal. | 06-04-2009 |
20090120268 | Apparatus and Method for Searching and Displaying Data - An apparatus and method for searching and displaying data are provided. The method includes a scroller having a plurality of touch pads, a memory for storing the data, a controller for obtaining a first memory area of the memory in which data to be displayed are stored, and then sequentially displaying the data of the first memory area when the data to be displayed are selected, as well as obtaining a second memory area within the first memory area corresponding to a position of a touched touch pad and then sequentially displaying data of the second memory area when the touch pad is touched for more than a pre-determined time, and obtaining a scroll direction based on the position of the touched touch pad and then scrolling the screen in the obtained scroll direction when the touch pad is touched for less than the pre-determined time, and a user interface for enabling a user can to select the data to be displayed or request a memory mapping operation, and displaying or scrolling the data on a screen under control of the controller. | 05-14-2009 |
20090095542 | TOUCH SENSOR AND OPERATING METHOD THEREOF - 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. | 04-16-2009 |
20090095541 | INPUT DEVICE - 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. | 04-16-2009 |
20090021484 | OPTICAL POINTING DEVICE AND AUTOMATIC GAIN CONTROL METHOD THEREOF - 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. | 01-22-2009 |
20080295603 | Time to Digital Converting Circuit and Pressure Sensing Device Using the Same - 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. | 12-04-2008 |
20080273756 | POINTING DEVICE AND MOTION VALUE CALCULATING METHOD THEREOF - 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. | 11-06-2008 |
20080259034 | OPTICAL POINTING DEVICE AND METHOD FOR CALCULATING MOTION VALUE IN THE SAME - 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. | 10-23-2008 |
20080211769 | Input Device For Content Providing Device and Method of Operating the Same - An input device for a content providing device and a method of operating the same are provided. The input device includes: a pressure sensor having first pressure pads varying impedance according to contact strength, and periodically generating and outputting first pressure data having values corresponding to impedance of each of the first pressure pads; a button information generator for generating and outputting button information corresponding to the first pressure pad having the largest pressure data, when receiving the first pressure data; a pointing information generator for obtaining a position value of the first pressure pad having the largest pressure data when receiving the first pressure data, comparing the position value with the previously obtained position value to calculate a movement value of a contact position, and generating and outputting pointing information having the calculated movement value; and an operation selection unit for transmitting the first pressure data to the button information generator when the first pressure data transmitted from the pressure sensor is different from the previously obtained data and has a value larger than a button input value, and transmitting the first pressure data to the pointing information generator when the first pressure data transmitted from the pressure sensor is different from the previously obtained data and has value smaller than a pointing input value. Therefore, it is possible to perform various kinds of input operations using a single input device | 09-04-2008 |
20080204422 | Touch Sensor and Signal Generation Method Thereof - A touch sensor and a signal generation method thereof are provided. The touch sensor includes: an input signal generation unit generating an input signal; a reference signal generation unit delaying the input signal by a predetermined time to generate a first signal; a plurality of touch sensing signal generation units having a touch pad and delaying the input signal differently according to whether or not the touch pad is touched to generate a second signal; a plurality of variable delay units varying a delay time in response to a control signal and delaying the second signal in response to the varied delay time to generate a varied second signal; a plurality of touch signal generation units generating a touch signal according to a difference in delay time between the first signal and the second signal; and a control unit receiving and analyzing the plurality of touch signals, generating touch outputs when the touch pad is in a touched state, and supplying the control signals to the variable delay units when the touch pad is in a standby state. Accordingly, the delay value may be automatically adjusted even when the delay value, which has been initially set, is varied due to an external environment, so that the touch pad may be prevented from being mis-operated. | 08-28-2008 |