Abstract: A display device comprises a display panel which comprises scan lines, sensing lines, pixels electrically connected to each of the scan lines, and photo sensors electrically to each of the scan lines and the sensing lines, a scan driver which outputs scan signals to the scan lines according to a scan control signal, a timing controller which outputs the scan control signal to the scan driver, and a readout circuit which receives light sensing signals of the photo sensors from the sensing lines. The timing controller sets a frame frequency of the scan control signal to a first frame frequency in a first mode in which the display panel displays an image. The timing controller sets the frame frequency of the scan control signal to a second frame frequency in a second mode in which the photo sensors sense a fingerprint.

Abstract: A driving device for a display and a display using same, and a driving method of the display are provided. The display includes a display panel on which an image is displayed, and at least one optical sensor (photodetector) to detect the intensity of ambient (external) light incident upon the display panel. An external-brightness detector outputs an external-brightness signal based on the intensity of external (ambient) light and a backlight brightness controller changes the brightness of the image displayed (or backlight) on the display panel according to the external-brightness signal. The driving device may be implemented on an integrated circuit adapted to be connected to external-light photodetectors of type 1 or of type 2.

Abstract: A light source apparatus includes a light source module, a luminance determiner, an illuminance sensor and a light source driver. The light source module provides a display panel with light. The luminance determiner obtains luminance data of first image data including at least white image data that is converted from image data of a red color, a green color and a blue color. The illuminance sensor obtains sensing data based upon an external illuminance. The light source driver drives the light source module based upon the luminance data and the sensing data.

Abstract: A display device includes a first display panel, a first gate driver, a second display panel and a second gate driver. The first display panel includes a first display region, in which first gate lines are formed, and a first peripheral region surrounding the first display region. The first gate driver is formed at the first peripheral region and outputs a first gate signal to the first gate lines in response to a first clock signal and a second clock signal. The second display panel is electrically connected with the first display panel. The second display panel includes a second display region, in which second gate lines are formed, and a second peripheral region surrounding the second display region. The second gate driver is formed at the second peripheral region and outputs a second gate signal to the second gate lines in response to the first clock signal and second clock signal.

Abstract: A light source apparatus includes a light source module, a luminance determiner, an illuminance sensor and a light source driver. The light source module provides a display panel with light. The luminance determiner obtains luminance data of first image data including at least white image data that is converted from image data of a red color, a green color and a blue color. The illuminance sensor obtains sensing data based upon an external illuminance. The light source driver drives the light source module based upon the luminance data and the sensing data.

Abstract: A driving device for a display and a display using same, and a driving method of the display are provided. The display includes a display panel on which an image is displayed, and at least one optical sensor (photodetector) to detect the intensity of ambient (external) light incident upon the display panel. An external-brightness detector outputs an external-brightness signal based on the intensity of external (ambient) light and a backlight brightness controller changes the brightness of the image displayed (or backlight) on the display panel according to the external-brightness signal. The driving device may be implemented on an integrated circuit adapted to be connected to external-light photodetectors of type 1 or of type 2.

Abstract: A robot cleaner includes a drive unit for driving a plurality of wheels, a camera disposed in a body for photographing an upper image extending perpendicular to a running direction, a controller for recognizing a position by using position information obtained from a recognition mark formed on a ceiling of a working area that is photographed by the camera, and controlling the drive unit by using the recognized position information to correspond to a target cleaning operation. Accordingly, since the recognition mark for the recognition of a current position of the robot cleaner is formed on a ceiling that has a few changes, the position recognition is performed with more accuracy and the traveling of the robot cleaner to the target work area and a cleaning operation is performed efficiently.

Abstract: An apparatus for setting a common voltage include a screen generator, a flicker measuring part, a main controller and a read-only memory (“ROM”) programming part. The screen generator generates image data of a test screen. The flicker measuring part measures flicker on the test screen displayed on a display panel to which a common voltage corresponding to an estimated setting value is applied. The main controller calculates a measured flicker index from the measured flicker and compares the measured flicker index with a predetermined threshold value to determine a setting value corresponding to a flicker index of a plurality of calculated flicker indexes that is less than the threshold value. The ROM programming part writes the determined setting value to a ROM of a display module. Therefore, a common voltage is reestablished by the setting value, thus preventing flicker due to process variations.

Abstract: An apparatus for driving a display panel includes a timing control part, a line memory part, a frame memory part and an image compensation part. The timing control part receives a horizontal synchronizing signal from an external system via a CPU interface process. The line memory part stores an image signal of an n-th frame in a line unit, based on the horizontal synchronizing signal. The frame memory part stores an image signal of an (n-1)-th frame based on the horizontal synchronizing signal. The image compensation part generates a compensated image signal of the n-th frame using the image signals of the n-th and (n-1)-th frames, which are respectively outputted from the line memory part and the frame memory part, based on the horizontal synchronizing signal. Accordingly, display quality in a CPU interface mode may be enhanced.

Abstract: A liquid crystal display device and a method of driving the same include a display panel which has a first and a second surface facing each other, a plurality of first pixels which display an image on the first surface and a plurality of second pixels which display an image on the second surface, a data driver which supplies first and second data signals to the first pixels and the second pixels, respectively, and a gate driver which supplies gate signals to the first and second pixels. The gate driver and the data driver supply the gate signals and the first data signal to the plurality of first pixels in a first period, and supply the gate signals and the second data signal to the plurality of second pixels in a second period.

Abstract: A display device includes a first display panel, a first gate driver, a second display panel and a second gate driver. The first display panel includes a first display region, in which first gate lines are formed, and a first peripheral region surrounding the first display region. The first gate driver is formed at the first peripheral region and outputs a first gate signal to the first gate lines in response to a first clock signal and a second clock signal. The second display panel is electrically connected with the first display panel. The second display panel includes a second display region, in which second gate lines are formed, and a second peripheral region surrounding the second display region. The second gate driver is formed at the second peripheral region and outputs a second gate signal to the second gate lines in response to the first clock signal and second clock signal.

Abstract: The present invention relates to a driving device for a liquid crystal display includes a gray voltage generator that generates first and second reference gray voltages, a common voltage generator that generates a common voltage, and a data driver that generates a data voltage on the basis of the first and second reference gray voltages and applies the data voltage to the pixels. The gray voltage generator includes a variable resistor unit that changes the first reference gray voltage according to the type of liquid crystal display. In this way, it is possible to manufacture a general-purpose IC capable of being applied to all types of liquid crystal displays, rather than a dedicated IC used for only a specific type of liquid crystal displays.

Abstract: A robot cleaner, robot cleaning system, and a method for controlling the same, using wireless communications an upwardly-looking camera for photographing an upper image perpendicular to a forward-looking direction of driving the robot cleaner; and a controller for controlling the driving unit to allow the robot cleaner to drive within a cleaning area according to a predetermined driving path, and compensating the driving path by analyzing the image photographed by the upwardly-looking camera. Optional features include second forwardly directed camera to provide a three dimensional image sensors for sensing walls or obstacles and transmission of data to external processor/controllers by a radio antenna. The inventive system can recognize the robot cleaner position more accurately by using a relatively constant upper image reducing movement error to a target position.

Abstract: A robot cleaner includes a drive unit for driving a plurality of wheels, a camera disposed in a body for photographing an upper image extending perpendicular to a running direction, a controller for recognizing a position by using position information obtained from a recognition mark formed on a ceiling of a working area that is photographed by the camera, and controlling the drive unit by using the recognized position information to correspond to a target cleaning operation. Accordingly, since the recognition mark for the recognition of a current position of the robot cleaner is formed on a ceiling that has a few changes, the position recognition is performed with more accuracy and the traveling of the robot cleaner to the target work area and a cleaning operation is performed efficiently.

Abstract: A mobile robot capable of recognizing its location and adjusting its direction in response to an obstacle in its way includes a running device, an obstacle detecting device for detecting the presence of an obstacle, a location recognizing device, a controlling portion, and a power supply. The location recognizing device includes a first vision camera directed toward the ceiling of a room and a first vision board. The first vision camera recognizes a base mark on the ceiling. The first vision board processes an image from the first vision camera and transmits the image data to the controlling portion. The obstacle detecting device includes a line laser for emitting a linear light beam toward the obstacle, a second vision camera for recognizing a reflective linear light beam from the obstacle, and a second vision board for processing image data captured by the second vision camera.

Abstract: A robot cleaner, robot cleaning system, and a method for controlling the same, the robot cleaner cleaning by wirelessly communicating with an external apparatus having a driving unit for driving a plurality of wheels; an upper camera disposed on a main body for photographing an upper image perpendicular to a direction of driving the robot cleaner; and a controller for controlling the driving unit to allow the robot cleaner to drive with a cleaning area according to a predetermined driving pattern, and compensating the driving path by analyzing the image photographed by the upper camera. In other embodiments, the robot cleaner may include a second forwardly directed camera which may be utilized to provide a three dimensional image of the cleaning area, and also sensors for sensing the walls defining a cleaning area or obstacles in the cleaning area.

Abstract: A mobile robot capable of recognizing its location and adjusting its direction in response to an obstacle in its way includes a running device, an obstacle detecting device for detecting the presence of an obstacle, a location recognizing device, a controlling portion, and a power supply. The location recognizing device includes a first vision camera directed toward the ceiling of a room and a first vision board. The first vision camera recognizes a base mark on the ceiling. The first vision board processes an image from the first vision camera and transmits the image data to the controlling portion. The obstacle detecting device includes a line laser for emitting a linear light beam toward the obstacle, a second vision camera for recognizing a reflective linear light beam from the obstacle, and a second vision board for processing image data captured by the second vision camera.

Abstract: An arc sensing method in an automated welding process for accurately adjusting a position of a weaving center of a welding torch with respect to a welding center line on the basis of a change in an arc current according to the change in distance between a lower end of the welding torch and a welding surface during weaving of the welding torch, is disclosed. The arc sensing method is accomplished by detecting the position of the weaving center of the welding torch with respect to the welding center line using the differential value of the arc current. Therefore, the position of the weaving center of the welding torch is accurately determined regardless of the degree of inclination of welding surfaces or the position of the base metals with respect to the welding torch. Accordingly, welding in a state in which the welding torch is off-center from the welding center line can be prevented.