Abstract: Disclosed is a method for evaluating the qualities of the user's color vision by means of the FM chromaticity test or directly measuring the defective factors of the user causing the color blindness. Thus it modifies the color composition of a video displaying apparatus according to a numerical analysis of the color and degree of color blindness specific to each dichromatic individual, so that he may perceive the same colors as the normal person. Also discloses is an apparatus for performing the method steps described herein.

Abstract: A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.

Abstract: An adaptive equalizer including n filters in parallel with one another to output signals generated from filtered input data; n error generation units, in parallel with one another, to respectively generate errors with respect to the signals output from the n filters; n filter coefficient update units, in parallel with one another, to respectively update filter coefficients of the n filters using the errors output from the n error generation units and the data input to the n filters; and a clock divider to divide a clock signal by n and to provide the n-divided clock signals having different phases to the n filters, the n error generation units, and the n filter coefficient update units, wherein n is a natural number equal to or greater than 2.

Abstract: Disclosed is a method for evaluating the qualities of the user's color vision by means of the FM chromaticity test or directly measuring the defective factors of the user causing the color blindness. Thus it modifies the color composition of a video displaying apparatus according to a numerical analysis of the color and degree of color blindness specific to each dichromatic individual, so that he may perceive the same colors as the normal person. Also discloses is an apparatus for performing the method steps described herein.

Abstract: A method of realizing images in a portable display apparatus including a camera module and an LCD monitor includes the steps of: converting three primary lights, which are realized by the camera module, into a first tri-stimulus value; converting the first tri-stimulus value into a second tri-stimulus value through a color gamut mapping of the first tri-stimulus value for the LCD monitor; and converting the second tri-stimulus value into three primary lights for images the LCD monitor is configured to display and then transferring the three converted-to primary lights to the LCD monitor.

Abstract: A method for compensating an image produced by image means for implementing image information takes account of ambient illumination. Luminance of external background illumination around the image means is measured. The measured luminance of the background illumination is compared with preset tristimulus values and a reflectance factor of the image means, a comparison result is computed, and a control signal is generated to compensate luminance and chroma of an image. Luminance and chroma of the image means are compensated in response to the control signal.

Abstract: An apparatus and method for acquiring multi-user signal synchronization in a CDMA system is disclosed. In a preferred embodiment, pilot signals are generated using different PN seeds and the generated pilot signals are aligned to thus be transmitted within a predetermined time from the synchronization point of time in a plurality of CDMA transmitters. A tap coefficient is varied at a prescribed interval in a frame period using a plurality of PN seeds used in the plurality of CDMA transmitters and synchronization of signals transmitted from the plurality of CDMA transmitters is acquired. The construction of the apparatus is thus simplified and multi-user signal synchronization is acquired within one frame time, which is the shortest time.

Abstract: A circuit for selectively generating one of three voltage level as an output has a pull-up transistor and a pull-down transistor. The circuit includes a bias voltage source for generating a constant voltage signal; a temperature compensating constant-current source for outputting variable voltage signal corresponding to a temperature change; a tri-state control circuit for receiving a data signal to generate a control signal based on the data signal; and a switching circuit, in response to the control signal, for selectively the bias voltage source and the temperature compensating constant current source to the pull-up and pull-down transistors.

Abstract: A temperature compensatory constant current generator comprises a temperature inversely proportional constant current generator for supplying a temperature inversely proportional current, a temperature proportional constant current generator for supplying a temperature proportional current, a temperature inversely proportional current supplier for outputting the temperature inversely proportional current from the temperature inversely proportional constant current generator, a temperature proportional current supplier for outputting the temperature proportional current from the temperature proportional constant current generator and a square root generator for providing a current proportional to multiplied square roots of the temperature inversely proportional current and the temperature proportional current.

Abstract: A 3-state buffer circuit applicable for a CMOS output drive circuit is disclosed. The output circuit provides reduced ground noise and delay time of an output signal by decreasing a counter-electromotive force generated upon turning ON of the output transistor. The circuit includes a subsidiary drive circuit for applying a voltage less than the power source Vcc to a gate of an NMOS transistor connected on the ground side of the drive circuit so that generation of the counter-electromotive force is minimized.