Abstract: A display system, including a plurality of display apparatuses, is disclosed. The display system includes: a plurality of display apparatuses each of which includes a display unit, a user input unit, and a controller which sets a display ID according to a user's selection and controls the display unit to generate a display identification signal corresponding to the set display ID; a pointing device which, if a display unit is touched, determines a display ID of the touched display unit, calculates coordinate information of a touched position of the touched display unit based on the display identification signal of the touched display unit, and transmits, to a server, the display ID and the coordinate information of the touched position; and an image processing apparatus which displays, on a display unit corresponding to the determined display ID, an image corresponding to the calculated coordinate information of the touched position.

Abstract: There is provided a display apparatus which includes a signal processing part which processes a video signal including at a peripheral area thereof a position determining pattern having a plurality of characteristics; a display part which displays a picture on the basis of the video signal processed by the signal processing part; a sensing part which senses the position determining pattern which is included in the video signal; and a control part which controls the signal processing part to adjust a position of the picture displayed on the display part, on the basis of a shift between a characteristic sensed by the sensing part among the plurality of characteristics of the position determining pattern and a predetermined reference characteristic. The position determining pattern has a face shape. Accordingly, the position of the picture can be quickly determined and adjusted.

Abstract: There is provided a display apparatus which includes a signal processing part which processes a video signal including at a peripheral area thereof a position determining pattern having a plurality of characteristics; a display part which displays a picture on the basis of the video signal processed by the signal processing part; a sensing part which senses the position determining pattern which is included in the video signal; and a control part which controls the signal processing part to adjust a position of the picture displayed on the display part, on the basis of a shift between a characteristic sensed by the sensing part among the plurality of characteristics of the position determining pattern and a predetermined reference characteristic. The position determining pattern has a face shape. Accordingly, the position of the picture can be quickly determined and adjusted.

Abstract: An apparatus and method for controlling a convergence of a projection television includes a pattern generator which generates R, G, and B video patterns used for controlling the convergence and then outputs the R, G, and B video patterns to a display, and a controller which compares position coordinates and luminance levels of the R, G, and B video patterns with position coordinates and luminance levels of reference R, G, and B video patterns to adjust the luminance levels of the R, G, and B video patterns to the luminance levels of the reference R, G, and B video patterns.

Abstract: A convergence data recovering method and a projection television employing the same are provided. The convergence data recovering method includes storing a plurality of convergence data in a memory that are recognized as a data matrix, storing reference row data and reference column data for each row and each column of the data matrix in the memory, calculating comparative row data for each row based on convergence data forming each row of the data matrix, calculating comparative column data to each column based on convergence data forming each column of the data matrix, detecting target data according to whether the reference row data and the comparative row data are identical, and whether the reference column data and the comparative column data are identical, and recovering the target data. Accordingly, target data may be more accurately detected from the convergence data stored in the memory and then recovered.

Abstract: A convergence compensation apparatus includes a memory for storing a manual convergence compensation data which is preset by a user, and a convergence control unit for applying the manual convergence compensation data and an automatic convergence compensation data generated by the automatic color coincidence task, and for allowing a convergence distortion of the projection television to be compensated.

Abstract: Convergence control apparatus of a projection television has: a pattern generator for generating a reference pattern; optical sensors for sensing the change of luminance of the reference pattern moving on a screen; and a convergence controller for compensating for the tilt of the reference pattern based on the output of the optical sensors. The optical sensors are respectively disposed at opposite sides on the screen. The convergence controller detects the angular error of the reference pattern distorted by earth's magnetic field, based on the difference between a standard position and a measured position of a maximum luminance of the reference pattern, and controls a deflection circuit to compensate for the angular error. When the image displayed on the screen is tilted by the influence of the earth's magnetic field, the tilt of the picture can be compensated. After completing the compensation for the angular error, a positional error of CRTs for R, G, and B colors is also compensated.

Abstract: Disclosed is a projection image display apparatus, specified in a convergence adjusting apparatus employing a spline interpolation scheme.

Abstract: An analog-to-digital converting apparatus for rapidly processing a plurality of analog input signals at a high rate and a display device using the same. The apparatus includes a clock signal generator that generates a clock signal with a predetermined frequency; a control signal generator that generates a switching control signal using the clock signal; a multiplexer (MUX) that receives and selectively outputs signals of the plurality of analog input signals according to the switching control signal; and an analog-to-digital converter (ADC) that converts an analog signal selected and output by the MUX to a digital signal.

Abstract: An analog-to-digital converting apparatus for rapidly processing a plurality of analog input signals at a high rate and a display device using the same. The apparatus includes a clock signal generator that generates a clock signal with a predetermined frequency; a control signal generator that generates a switching control signal using the clock signal; a multiplexer (MUX) that receives and selectively outputs signals of the plurality of analog input signals according to the switching control signal; and an analog-to-digital converter (ADC) that converts an analog signal selected and output by the MUX to a digital signal.

Abstract: An analog-to-digital converting apparatus for rapidly processing a plurality of analog input signals at a high rate and a display device using the same. The apparatus includes a clock signal generator that generates a clock signal with a predetermined frequency; a control signal generator that generates a switching control signal using the clock signal; a multiplexer (MUX) that receives and selectively outputs signals of the plurality of analog input signals according to the switching control signal; and an analog-to-digital converter (ADC) that converts an analog signal selected and output by the MUX to a digital signal.

Abstract: Provided are a display device, and more particularly, a display device shared between a digital-to-analog converter for outputting a convergence signal and a digital-to-analog converter for outputting a dynamic focus signal, in a projection television using 3 cathode-ray tube projection optics.

Abstract: An analog-to-digital converting apparatus for rapidly processing a plurality of analog input signals at a high rate and a display device using the same. The apparatus includes a clock signal generator that generates a clock signal with a predetermined frequency; a control signal generator that generates a switching control signal using the clock signal; a multiplexer (MUX) that receives and selectively outputs signals of the plurality of analog input signals according to the switching control signal; and an analog-to-digital converter (ADC) that converts an analog signal selected and output by the MUX to a digital signal.

Abstract: Provided are a display device, and more particularly, a display device shared between a digital-to-analog converter for outputting a convergence signal and a digital-to-analog converter for outputting a dynamic focus signal, in a projection television using 3 cathode-ray tube projection optics.

Abstract: An apparatus and method for controlling a convergence of a projection television includes a pattern generator which generates R, G, and B video patterns used for controlling the convergence and then outputs the R, G, and B video patterns to a display, and a controller which compares position coordinates and luminance levels of the R, G, and B video patterns with position coordinates and luminance levels of reference R, G, and B video patterns to adjust the luminance levels of the R, G, and B video patterns to the luminance levels of the reference R, G, and B video patterns.

Abstract: Disclosed is a projection image display apparatus, specified in a convergence adjusting apparatus employing a spline interpolation scheme.

Abstract: Convergence control apparatus of a projection television has: a pattern generator for generating a reference pattern; optical sensors for sensing the change of luminance of the reference pattern moving on a screen; and a convergence controller for compensating for the tilt of the reference pattern based on the output of the optical sensors. The optical sensors are respectively disposed at opposite sides on the screen. The convergence controller detects the angular error of the reference pattern distorted by earth's magnetic field, based on the difference between a standard position and a measured position of a maximum luminance of the reference pattern, and controls a deflection circuit to compensate for the angular error. When the image displayed on the screen is tilted by the influence of the earth's magnetic field, the tilt of the picture can be compensated. After completing the compensation for the angular error, a positional error of CRTs for R, G, and B colors is also compensated.

Abstract: An apparatus and method for ring spline convergence correction for accurately affecting convergence at the outermost portion of a screen using ring spline interpolation are provided. Convergence correction data between seed data is output through an operation using a spline interpolation polynomial in the form of a ring which is continuous with an adjacent line, thereby accurately calculating convergence correction data at the outermost point of a screen to minimize the error in convergence.

Abstract: There is provided a convergence adjusting apparatus and method using spline interpolation in a projection image display device. In the convergence adjusting apparatus, a controller calculates the unknown coefficients of a cubic spline interpolation polynomial for each line segment separated by adjustment points on a horizontal or vertical line to interpolate between the adjustment points, a memory temporarily stores the unknown coefficients, a coordinate position generator counts horizontal sync signal pulses and calculates the square and cube of the count value, a plurality of multipliers multiply the count value, the square, and the cube by the unknown coefficients received from the memory, respectively, and an adder adds convergence adjustment point data received from the memory and the outputs of the multipliers and outputs interpolation values.

Abstract: An apparatus and method for ring spline convergence correction for accurately affecting convergence at the outermost portion of a screen using ring spline interpolation are provided. Convergence correction data between seed data is output through an operation using a spline interpolation polynomial in the form of a ring which is continuous with an adjacent line, thereby accurately calculating convergence correction data at the outermost point of a screen to minimize the error in convergence.