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: Provided are image display apparatus and image display methods capable of suitably making correction for variation of driving conditions due to an electric resistance of matrix wiring of a display panel by downsized hardware. The apparatus and methods involve a device of calculating voltage drop amounts caused by the resistance of row wires, for input image data, and a device of calculating image data with correction for the voltage drop amounts (corrected image data). An overflow processing circuit is provided so as to prevent overflow of the image data after the correction from an input range of a modulator, and the overflow is prevented by a gain. Since a gradation converter for changing a gradation conversion characteristic by a gain is provided in the stage preceding to the configuration for making the correction for influence of the voltage drop, it becomes feasible to cancel saturation characteristics of phosphors and to display images with high quality thereby.

Abstract: An image display apparatus includes row wiring, a plurality of column wirings, a modulator, and a plurality of display devices. The plurality of display devices are commonly connected to the row wiring, each of the plurality of column wirings is connected to a corresponding one of the plurality of display devices, and the modulator supplies a modulated signal to the column wirings. The modulator includes a pulse width modulator for generating a pulse signal having a time width corresponding to the tone of a signal to be displayed, and a potential setting circuit for setting the potential of the pulse signal in accordance with the type of signal to be displayed.

Abstract: The present invention is to provide an image display apparatus capable of properly correcting or adjusting, with small-scale hardware, variations in drive conditions due to electric resistance of matrix wiring on a display panel. The image display apparatus includes an adjusted image data calculation unit 14 for calculating adjusted image data as image data that has been compensated for the influence of voltage drop caused by resistance of at least the row wiring and a scan unit. The image display apparatus also includes an amplitude adjustment unit having a function for adjusting the amplitude of adjusted image data Dout, and a modulator 8 the takes in the adjusted image data with the amplitude adjusted and outputs a modulation signal to the column wiring.

Abstract: There is provided an image display device and a method of adjusting an image display device, in which a loss in brightness due to a voltage drop is compensated to thereby obtain an excellent image. In a construction having a plurality of display elements driven by means of a matrix wiring, images which are used for making adjustments reflecting a plurality of compensation conditions are displayed. A person making an adjustment selects an appropriate condition with a remote controller and a button. Thus, compensated image data adjusted according to the selected condition is obtained.

Abstract: An image display apparatus includes row wiring, a plurality of column wirings, a modulator, and a plurality of display devices. The plurality of display devices are commonly connected to the row wiring, each of the plurality of column wirings is connected to a corresponding one of the plurality of display devices, and the modulator supplies a modulated signal to the column wirings. The modulator includes a pulse width modulator for generating a pulse signal having a time width corresponding to the tone of a signal to be displayed, and a potential setting circuit for setting the potential of the pulse signal in accordance with the type of signal to be displayed.

Abstract: For decreasing hardware for correction to compensate for decrease of luminance due to decrease in drive voltage of devices, a plurality of electron-emitting devices are arranged in a matrix pattern and wired by a plurality of row and column lines, a column wiring driving unit applies voltage pulses to the column lines, and row wiring driving units apply voltages to the row lines to switch a row to be selected. The image signal processing unit divides a luminance level of an image signal into plural areas in the signal amplitude direction in response to each split timing signal. There are provided means for detecting frequencies of luminance signals included in the respective amplitude areas, a correction quantity calculating unit for outputting correction signals based on the detected values, and an adding unit for adding the correction signals and luminance signals, which outputs results of addition as electron emission requirements to the column wiring driving unit.

Abstract: For decreasing hardware for correction to compensate for decrease of luminance due to decrease in drive voltage of devices, a plurality of electron-emitting devices are arranged in a matrix pattern and wired by a plurality of row and column lines, a column wiring driving unit applies voltage pulses to the column lines, and row wiring driving units apply voltages to the row lines to switch a row to be selected. The image signal processing unit divides a luminance level of an image signal into plural areas in the signal amplitude direction in response to each split timing signal. There are provided means for detecting frequencies of luminance signals included in the respective amplitude areas, a correction quantity calculating unit for outputting correction signals based on the detected values, and an adding unit for adding the correction signals and luminance signals, which outputs results of addition as electron emission requirements to the column wiring driving unit.

Abstract: A modulation clock supplied to a drive circuit (7) of a display panel (1) is frequency-modulated so as to spread its harmonics spectrum. The frequency deviation is so restricted that, if at least two pixels corresponding to two adjacent scanning wirings are displayed based on arbitrary same luminance data, a difference in display luminance in a specified period between one pixel and the other pixel is less than or equal to a tolerable value determined by the luminance data.

Abstract: In an image display apparatus, image data on which gradation conversion for compensating phosphor saturation has been carried out by a gradation convertor (200) undergoes voltage drop compensation and then amplitude regulation using a gain (Gd) before being fed to modulating means (8). Here, the gradation convertor (200) changes its conversion characteristic (the region of a compensation table it uses) in accordance with the value of the gain (Gd). As a result it is possible to compensate the affects of phosphor saturation characteristics and voltage drop and an excellent image can be displayed.

Abstract: Driving condition is determined so that the stimulating values of brightness with respect to drive data become closer to being regular in interval. As the drive condition, the frequency of a reference clock used for the pulse width modulation is changed to be higher than the range of high gradations in the range of low gradations in drive data. Accordingly, smaller increment in brightness in the range of low gradation and larger increment in the range of high gradations are achieved.

Abstract: In a color signal correction apparatus, having suppression of variation of a chromaticity point of a achromatic color in an image display apparatus as an object, which is equipped with independent luminescent characteristic correction units respectively with respect to each color for correcting a luminescent characteristic of luminance of respective colors of R, G, and B, an offset value for use in chromaticity correction, for suppressing variation of a chromaticity point of a simple color and a white color, which is defined in accordance with a luminance level is selected or generated on the basis of one or two color data which is selected from respective colors of R, G, and B which are inputted into the luminescent characteristic correction unit, and the offset value is added to one color data which was selected from remaining one or two colors, and inputted into the luminescent characteristic correction unit of that color, and thereby, it becomes possible to produce a color signal for suppressing variation

Abstract: An image display apparatus includes scanning circuits for sequentially selecting and scanning row wirings, a modulation circuit for outputting a modulated signal to be applied to column wirings, and a voltage drop compensation means for calculating corrected image data for reducing the influence of voltage drops due to at least resistance components of the row wirings, with respect to image data. The modulated signal is a pulse-width modulated voltage signal having a plurality of voltage amplitude values, and the modulation circuit outputs a modulated signal in which a pulse width and/or a voltage amplitude value of the modulated signal are expanded on the basis of the corrected image data.

Abstract: In a display panel constituted by an airtight container substantially evacuated in which a plurality of spacers are interposed between an electron source on which a plurality of electron-emitting devices are arranged, and a face plate which is arranged in correspondence with the electron source and has a fluorescent substance for emitting light by collision against electrons, an acceleration electrode is arranged on the face plate side and receives a high voltage to accelerate electrons emitted by the electron source toward the fluorescent substance. A discharge phenomenon generated by application of the high voltage via the spacer, or a current according to the discharge is detected. The acceleration electrode is made up of a plurality of divided electrodes to accurately grasp the location where the discharge occurred.

Abstract: An image display apparatus includes a display panel having an electron source, an acceleration electrode for accelerating electrons emitted from the electron source and phosphors for emitting light by collision of electrons accelerated by the acceleration electrode, and a detector for detecting a current flowing through the acceleration electrode during a non-display period. In addition, a controller is provided to decrease the luminance level, stop display driving or transmit warning information when the current detected becomes more than a predetermined value.

Abstract: A gradation characteristic high in contrast without degrading the gradation is realized. In order to achieve this, an image display device is provided that includes: a display panel, in which (m×n) cold cathode devices are connected in matrix by m row wirings and n column wirings, a scan unit connected to the row wirings, a modulation unit connected to the column wirings, light emitting unit disposed at positions opposite to the cold cathode devices, an M-bit voltage amplitude modulation unit; and a pulse width limiting unit are disposed with respect to the M-bit image data as the modulation unit.

Abstract: A display apparatus includes a display panel having display devices arranged in a matrix layout and driven through a plurality of row wirings and column wirings, a scanning unit to scan the row wirings, and a modulation unit to supply a modulation signal to the column wirings. A compensation unit applies compensation processing to compensate for fluctuation of display luminance due to the influence of voltage drop caused by a resistance of the row wiring to the image data, and a luminance control unit controls display luminance of the display panel based upon luminance information of the image data.

Abstract: According to the present invention, the affect of the fluctuation of a signal that is caused by interference between the lines of an image display apparatus can be reduced.

Abstract: Provided are image display apparatus and image display methods capable of suitably making correction for variation of driving conditions due to an electric resistance of matrix wiring of a display panel by downsized hardware. The apparatus and methods involve a device of calculating voltage drop amounts caused by the resistance of row wires, for input image data, and a device of calculating image data with correction for the voltage drop amounts (corrected image data). An overflow processing circuit is provided so as to prevent overflow of the image data after the correction from an input range of a modulator, and the overflow is prevented by a gain. Since a gradation converter for changing a gradation conversion characteristic by a gain is provided in the stage preceding to the configuration for making the correction for influence of the voltage drop, it becomes feasible to cancel saturation characteristics of phosphors and to display images with high quality thereby.

Abstract: There is provided an image display device and a method of adjusting an image display device, in which a loss in brightness due to a voltage drop is compensated to thereby obtain an excellent image. In a construction having a plurality of display elements driven by means of a matrix wiring, images which are used for making adjustments reflecting a plurality of compensation conditions are displayed. A person making an adjustment selects an appropriate condition with a remote controller and a button. Thus, compensated image data adjusted according to the selected condition is obtained.