Abstract: An image display system includes a display device, an input section to which video signals of an interlace scanning system are inputted, a signal converter section which increases horizontal scanning lines of the inputted video signals in number by a factor of at least two, and which generates first and second fields, each of the fields including effective scanning lines used for displaying and ineffective scanning lines not used for displaying, with the effective and ineffective scanning lines being arranged alternately in each of the fields, and a display control section which controls the display device to display the first and second fields alternately. The display control section controls the display device such that positions of the effective scanning lines of the first fields correspond with those of the ineffective scanning lines of the second fields, and vice versa.

Abstract: An image display system includes a memory for storing at least one scanning line of an inputted video signal of the interlace scanning system, and reading means for repeating to read the video signal of one scanning line from the memory at a speed which is n (n is an integer of 2 or more) times of the writing speed of the video signal for the memory for a horizontal scanning period which is 1/n of the writing period and to stop reading for a horizontal scanning period of the remaining (n?1)/n for each scanning line of one field which is sequentially inputted and reading each scanning line so that the continuous fields interpolate the period of stopping of reading from the memory each other.

Abstract: An image display system includes a memory for storing at least one scanning line of an inputted video signal of the interlace scanning system, and reading means for repeating to read the video signal of one scanning line from the memory at a speed which is n (n is an integer of 2 or more) times of the writing speed of the video signal for the memory for a horizontal scanning period which is 1/n of the writing period and to stop reading for a horizontal scanning period of the remaining (n−1)/n for each scanning line of one field which is sequentially inputted and reading each scanning line so that the continuous fields interpolate the period of stopping of reading from the memory each other.

Abstract: A data communication system includes a transmitting device having a unit for storing a plurality of data, a unit for receiving a request to transmit first data from the communication terminal, and for transmitting the first data to the communication terminal in response to the request for transmission; and a communication terminal having a unit for transmitting the request to transmit the first data to the transmitting device, a data receiving unit for receiving the first data, a first storage for storing the first data, a second storage for storing second data different from the first data, a reading unit for reading data storage, a display unit for stored in the first storage or second displaying the data read out by the reading unit, and a control unit for performing control for the reading unit.

Abstract: A display apparatus capable of receiving and displaying video signals which differ in scanning frequencies or resolutions. The display apparatus includes an input section for receiving at least one video signal and a conversion unit for converting at least one of the frequency and resolution of the at least one received video signal so as to be within predetermined higher ranges thereof. A display unit enables display of the converted received at least one video signal.

Abstract: The apparent changes of color tones are suppressed by changing the characteristics of the voltage applied to the liquid crystal according to the switching-over of the light source intensity. Therefore, the disturbed color tones caused by a variation of the light source emission spectrum are compensated. The light source can be controlled practically, so that the liquid crystal display is sophisticated by implementing the power saving mode and extending the adjusting range of the contrast and bright levels.

Abstract: An image display system includes a display circuit which displays an image composed of a plurality of sub-images, an input circuit which inputs a certain image signal including at least one sub-image embedded in the certain image signal which is provided by at least one of fields and frames, a designating circuit which designates timings of composition positions of the sub-image on scan lines of the certain image, and one control circuit which controls at least one of an amplitude level and a DC level of image signals corresponding to an area of the sub-image detected by the timing designated by the designating circuit.

Abstract: A display apparatus capable of receiving and displaying video signals which differ in scanning frequencies or resolutions. The display apparatus includes an input section for receiving at least one video signal and a conversion unit for converting at least one of the frequency and resolution of the at least one received video signal so as to be within predetermined higher ranges thereof. A display unit enables display of the converted received at least one video signal.

Abstract: The present invention relates to a multiscreen display apparatus in which one large screen is formed by combining screens of a plurality of display units. The multiscreen display apparatus includes data converters respectively provided in the display units, the data converters receiving video signal data represented in a digital form and correcting the video signal data according to correction data obtained on the basis of display characteristics of the display units to make luminance or color shading of a plurality of divisional regions of the screen of each display unit uniform, and a control unit for controlling data correction operations of the plurality of data converters as a whole.

Abstract: Double line sequential scanning is performed on a display apparatus which displays, for example, a television signal and a character and graphics signal. When only a television signal is to be displayed, priority is given to the resolution of the image. When a character an graphics signal is to be displayed superimposed on the television signal, double line sequential non-interlace scanning is performed by force. In this manner, the problem of sticking or ghosting of the character and graphic images is reduced.