Abstract: A detection unit which includes an image display panel, brightness averaging unit, scene changeover detection unit, and brightness suppression unit in order to provide an image display apparatus having an ABL that does not give the observer any visual sense of incompatibility without increasing the circuit scale determines the presence/absence of a scene changeover on the basis of the frame differential or second order differential of the average brightness. If a scene changeover takes place, the display brightness is changed quickly, and if no scene changeover occurs, changed slowly.

Abstract: A detection unit which includes an image display panel, brightness averaging unit, scene changeover detection unit, and brightness suppression unit in order to provide an image display apparatus having an ABL that does not give the observer any visual sense of incompatibility without increasing the circuit scale determines the presence/absence of a scene changeover on the basis of the frame differential or second order differential of the average brightness. If a scene changeover takes place, the display brightness is changed quickly, and if no scene changeover occurs, changed slowly.

Abstract: This invention discloses an arrangement allowing connection of various kinds of image displays to one supply source in an image display control system having a supply source for transmitting a signal including at least a video signal, and an image display for receiving the signal and displaying a corresponding image. The supply source acquires characteristic data of the image display when it is powered on, determines a signal communication specification with the image display based on the acquired characteristic data, and communicates a signal including the video signal with the determined communication specification. The image display transmits characteristic data for specifying the characteristics of the image display to the supply source, and communicates the signal including the video signal in accordance with the determined communication specification. This invention also discloses an arrangement permitting changing the specifications and version of the control program of the image display.

Abstract: A control circuit of an image display apparatus controls an output of video signals so that a non-display period TC set between an end of display of images corresponding to a first input video signal for one vertical scan and a start of display of an image corresponding to a second input video signal for the next one vertical scan can satisfy a relationship: TC>(TA?TB)/N, where TA denotes a period between the start of the display of the images corresponding to the first input video signal and the start of the display of the image corresponding to the second input video signal, TB denotes a sum of display periods for the respective images corresponding to the first input video signal, and N denotes the number of the images corresponding to the first input video signal.

Abstract: An image display apparatus includes: a first driving mode that selects only one scanning wiring in one selection period; and a second driving mode that drives the image display apparatus so as to select, in one selection period, a plurality of scanning wiring at the same time and to select, in the following selection period, a plurality of scanning wiring shifted by one scanning wiring from the plurality of scanning wiring selected in the preceding selection period, and uses, in the first driving mode, a correction display signal computed in the first driving mode and for correcting variation in luminance, and outputs, in the second driving mode, a modulation signal based on a correction display signal different from the correction display signal computed in the first driving mode.

Abstract: An image display apparatus includes: a first driving mode that selects only one scanning wiring in one selection period; and a second driving mode that drives the image display apparatus so as to select, in one selection period, a plurality of scanning wiring at the same time and to select, in the following selection period, a plurality of scanning wiring shifted by one scanning wiring from the plurality of scanning wiring selected in the preceding selection period, and uses, in the first driving mode, a correction display signal computed in the first driving mode and for correcting variation in luminance, and outputs, in the second driving mode, a modulation signal based on a correction display signal different from the correction display signal computed in the first driving mode.

Abstract: In order to obtain a satisfactory image by making a peak luminance of an image to be displayed large and suppressing an occurrence of unnecessary period, there is provided a display driving method for driving a display with a plurality of scanning wirings and a plurality of modulation wirings, comprising: a step of supplying a scan selection signal to a scanning wiring selected out of the plural scanning wirings for each horizontal scanning period; and a step of supplying a modulation signal modulated in accordance with image data to the plural modulation wirings for each horizontal scanning period, in which the selection period of the scan selection signal varies between at least two horizontal scanning periods in a vertical scanning period.

Abstract: A scanning wiring driving unit for generating a signal of a frequency Fb applies a scanning signal to a plurality of scanning wirings which are a part of a plurality of scanning wirings. In a next selection period following a predetermined selection period, by shifting by a portion of the scanning wiring to which the scanning signal was applied in a previous stage, a scanning signal is applied to a plurality of scanning wirings. Further, in any one of the selection periods, a scanning signal is applied to a plurality of scanning wirings simultaneously, and n pieces of scanning wirings are sequentially scanned by use of a frequency of n X Fb and below.

Abstract: Improved is luminance of an image display apparatus in which a display panel is configured by a matrix wired plurality of electron emitting devices, and long life thereof is tried to be realized. In one select period, a scanning signal is applied to a plurality of scan interconnection. In a subsequent select period, a scanning signal is applied to a plurality of scan interconnections which were shifted with one scan interconnection portion. Between scanning signals, a low level portion is disposed. Also, pulse width modulation is carried out.

Abstract: An image display apparatus includes a display panel configured by a matrix wired plurality of electron emitting devices. In one select period, a scanning signal is applied to a plurality of scan interconnections. In a subsequent select period, a scanning signal is applied to a plurality of scan interconnections which were shifted with one scan interconnection portion. Between scanning signals, a signal level is controlled to a non-selection electric potential.

Abstract: An image display apparatus has an image display including scanning lines, modulation lines and display devices driven through the scanning lines and modulation lines, a scanning circuit for supplying a scanning signal to the scanning line, a modulating circuit for supplying a modulation signal to the modulation line, and a converting circuit for converting the number of scanning lines of an input image signal. In addition, a selecting section selects a scan method of any of a first scan method and a second scan method and a changing section changes a vertical scaling filter characteristic of the converting circuit in accordance with the selected scan method. The vertical scaling filter characteristic in the case of the first scan method is a characteristic having a weaker elimination effect on high frequency components as compared with the vertical scaling filter characteristic in the case of the second scan method.

Abstract: To provide a bright, high-image-quality image display apparatus, in an overlap scanning mode in which two scan-wiring lines are selected simultaneously in each horizontal scanning period, high-frequency emphasis filtering is performed on a video signal so that a gain at a spatial frequency corresponding to ½ of a vertical critical resolution is within the range of 0 dB to +6 dB. It is even preferable that a gain of this high-frequency emphasis filtering at a spatial frequency corresponding to 7/10 of the vertical critical resolution be higher than or equal to +3 dB. For example, this high-frequency emphasis filtering can be implemented by a 3-tap FIR filter having filter coefficients (h1, h2, h3)=(?x/2, 1+x, ?x/2).

Abstract: The effect of the fluctuation of a signal that is caused by interference between the lines of an image display apparatus can be reduced. For this purpose, an image display apparatus comprises a plurality of lines, a plurality of display devices to which signals are respectively transmitted along the lines, and a signal circuit for generating the signals. The signal circuit outputs a signal having a duration, which is equivalent to a high-level period, that has been corrected in accordance with the length of a high-level period for a signal that is to be transmitted to an adjacent line of each line or in accordance with the number of times the level of a signal that is to be transmitted to an adjacent line is changed during the high-level period, or in order to reduce a change in luminance due to a level change for a signal that is to be transmitted to an adjacent line.

Abstract: This invention discloses an arrangement allowing connection of various kinds of image displays to one supply source in an image display control system having a supply source for transmitting a signal including at least a video signal, and an image display for receiving the signal and displaying a corresponding image. The supply source acquires characteristic data of the image display when it is powered on, determines a signal communication specification with the image display based on the acquired characteristic data, and communicates a signal including the video signal with the determined communication specification. The image display transmits characteristic data for specifying the characteristics of the image display to the supply source, and communicates the signal including the video signal in accordance with the determined communication specification. This invention also discloses an arrangement permitting changing the specifications and version of the control program of the image display.

Abstract: An image display apparatus include a plurality of scan wirings and a plurality of modulation wirings forming a matrix, display elements to be driven in matrix according to a scan signal applied by the scan wirings and a modulation signal applied by the modulation wirings, and a scan circuit for scanning the plurality of scan wirings and applying a scan signal to the selected scan wiring. An output circuit stores an input signal to be inputted in time-series, generates a plurality of outputs consisting of a time-series signal for generating a modulation signal based on the stored result and outputs the plurality of outputs to a plurality of output paths as parallel outputs. In addition, a modulation side drive circuit outputs parallel modulation signals based on the time-series signal for generating a modulation signal.

Abstract: A control circuit of an image display apparatus controls an output of video signals so that a non-display period TC set between an end of display of images corresponding to a first input video signal for one vertical scan and a start of display of an image corresponding to a second input video signal for the next one vertical scan can satisfy a relationship: TC>(TA?TB)/N, where TA denotes a period between the start of the display of the images corresponding to the first input video signal and the start of the display of the image corresponding to the second input video signal, TB denotes a sum of display periods for the respective images corresponding to the first input video signal, and N denotes the number of the images corresponding to said first input video signal.

Abstract: A detection unit which includes an image display panel, brightness averaging unit, scene changeover detection unit, and brightness suppression unit in order to provide an image display apparatus having an ABL that does not give the observer any visual sense of incompatibility without increasing the circuit scale determines the presence/absence of a scene changeover on the basis of the frame differential or second order differential of the average brightness. If a scene changeover takes place, the display brightness is changed quickly, and if no scene changeover occurs, changed slowly.

Abstract: A detection unit which includes an image display panel, brightness averaging unit, scene changeover detection unit, and brightness suppression unit in order to provide an image display apparatus having an ABL that does not give the observer any visual sense of incompatibility without increasing the circuit scale determines the presence/absence of a scene changeover on the basis of the frame differential or second order differential of the average brightness. If a scene changeover takes place, the display brightness is changed quickly, and if no scene changeover occurs, changed slowly.

Abstract: In order to obtain a satisfactory image by making a peak luminance of an image to be displayed large and suppressing an occurrence of unnecessary period, there is provided a display driving method for driving a display with a plurality of scanning wirings and a plurality of modulation wirings, comprising: a step of supplying a scan selection signal to a scanning wiring selected out of the plural scanning wirings for each horizontal scanning period; and a step of supplying a modulation signal modulated in accordance with image data to the plural modulation wirings for each horizontal scanning period, in which the selection period of the scan selection signal varies between at least two horizontal scanning periods in a vertical scanning period.

Abstract: In order to obtain a satisfactory image by making a peak luminance of an image to be displayed large and suppressing an occurrence of unnecessary period, there is provided a display driving method for driving a display with a plurality of scanning wirings and a plurality of modulation wirings, comprising: a step of supplying a scan selection signal to a scanning wiring selected out of the plural scanning wirings for each horizontal scanning period; and a step of supplying a modulation signal modulated in accordance with image data to the plural modulation wirings for each horizontal scanning period, in which the selection period of the scan selection signal varies between at least two horizontal scanning periods in a vertical scanning period.