Abstract: Picture quality on a display screen is corrected in accordance with a change either in image information or in the light state. The electronic apparatus includes a display panel, a lighting means for lighting the display panel, a parameter adjusting means for adjusting a parameter participating in picture quality so as to conform the light state while using variations in the light state of the lighting means as a trigger, a signal correcting means for inputting a display signal and correcting the input display signal in accordance with the adjusted parameter, and a driving means for driving the display panel on the basis of the corrected display signal. The light state is controlled according to the content of a file containing the information to be displayed.

Abstract: A pseudo-tone processing means color-reduces each RGB component of incoming display data using pseudo-tone processing. A frame memory stores the color-reduced display data before feeding it to a display through a drive means. Color reduction is performed so that the tone number of each RGB component after color reduction is G component>R component>B component. Color reduction is unequally performed in a manner which reflects contributions of each RGB component to brightness.

Abstract: It is one objective of the present invention to provide a portable video display apparatus for which the optimum picture quality can always be provided, without a complicated operation being required and without the load imposed on a CPU being increased by the execution of a program.

Abstract: A stored image is delivered via a network in response to requests from receiving terminals. Information concerning the color properties of the receiving terminals is acquired, and, based on the acquired information, the stored image is color-converted into images in accordance with the color properties of each receiving terminal. The color-converted stored images are the delivered. An output profile for each receiving terminal is used to improve color reproductivity.

Abstract: Picture quality on a display screen is corrected in accordance with a change either in image information or in the light state. The electronic apparatus includes a display panel, a lighting means for lighting the display panel, a parameter adjusting means for adjusting a parameter participating in picture quality so as to conform the light state while using variations in the light state of the lighting means as a trigger, a signal correcting means for inputting a display signal and correcting the input display signal in accordance with the adjusted parameter, and a driving means for driving the display panel on the basis of the corrected display signal. The light state is controlled according to the content of a file containing the information to be displayed.

Abstract: A pseudo-tone processing means color-reduces each RGB component of incoming display data using pseudo-tone processing. A frame memory stores the color-reduced display data before feeding h to a display through a drive means. Color reduction is performed so that the tone number of each RGB component after color reduction is G component>R component>B component. Color reduction is unequally performed in a manner which reflects contributions of each RGB component to brightness.