Patent application number | Description | Published |
20090140975 | IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - An image display apparatus includes: a luminance modification unit configured to modify the luminance setting value so as to make a luminance difference between adjacent partial regions of a back light smaller; a luminance distribution calculation unit configured to calculate a predicted value of luminance distribution of light incident on a liquid crystal panel from the back light on the basis of the modified luminance setting value; a liquid crystal transmittance correction unit configured to correct an optical transmittance of the image signal at each pixel of the liquid crystal panel on the basis of the image signal and the luminance distribution; a back light control unit configured to control the back light on the basis of the modified luminance setting value; and a liquid crystal control unit configured to control the liquid crystal panel so that the transmittance of the image signal becomes the corrected optical transmittance. | 06-04-2009 |
20090201245 | LIQUID CRYSTAL DISPLAY APPARATUS - A liquid crystal display apparatus includes: a liquid crystal panel having a plurality of pixels arranged in a matrix form; a back light having a plurality of light sources controlled individually in light emission luminance to supply light to the liquid crystal panel; an image processing unit configured to calculate luminance setting values respectively of the light sources of the back light and correct the video signal; a back light control unit configured to control the back light on the basis of luminance setting values; and a liquid crystal drive unit configured to drive the liquid crystal panel on the basis of the corrected video signal. In strength distribution of light incident, a relative strength compared with a direct component in spatial frequency domain is equal to or less than a first threshold in a spatial frequency region having a value of at least 1. | 08-13-2009 |
20100053066 | INFORMATION PROCESSING APPARATUS, AND IMAGE DISPLAY APPARATUS AND METHOD - An apparatus includes a unit computing, at each of positions on a target, first products of first reference values for light sources and factors for light sources, and a first sum of the first products corresponding to the light sources, and estimating, at each of the positions, the first sum as a first component at each of the positions, each of the first reference values being obtained referring to a first distribution, a unit computing a second sum of the factors for all of the light sources, and a second product of the second sum and second reference value, and estimating, at each of the positions, the second products as a second component at each of the positions, the second reference value being obtained referring to a second distribution that has a spatially constant value, and a unit computing a third sum of the first component and the second component. | 03-04-2010 |
20100149224 | IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND IMAGE DISPLAY DEVICE - An image processing apparatus has a light source luminance calculating unit which calculates the luminances of the light sources of the plurality of colors of a back light based on an input image, a light source maximum value detecting unit which detects a light source maximum value that is the largest value in the light source luminances of the plurality of colors, a light source luminance correcting unit which corrects the light source luminances to obtain corrected light source luminances so as to reduce the difference among the light source luminances of the plurality of colors if the light source maximum value is smaller than a threshold value, a gradation conversion function calculating unit which calculates a gradation conversion function applied to the input image corresponding to each of the plurality of colors, by using the corrected light source luminance, and a control unit which converts the input image by using the gradation conversion function and outputs the input image to a liquid crystal panel and generates the luminance control signal by using the corrected light source luminance and outputs the luminance control signal to the back light. | 06-17-2010 |
20100182346 | IMAGE DISPLAY DEVICE - An image display device | 07-22-2010 |
20100238201 | IMAGE DISPLAY APPARATUS - An image display apparatus for displaying images based on signals of an input image is provided. A backlight emits light. A liquid crystal panel modulates light emitted from the backlight. A emission intensity calculating unit calculates an emission intensity of the backlight such that a center value of a lightness range displayable on the panel defined depending on the emission intensity of the backlight substantially agrees with a center value between maximum and minimum values of lightness of each signal of the input image. A backlight controlling unit controls light emission of the backlight such that the light is emitted with the emission intensity. A signal correcting unit corrects each signal of the input image in accordance with the emission intensity. A liquid crystal controlling unit controls modulation of the liquid crystal panel based upon the corrected signals. | 09-23-2010 |
20110012824 | IMAGE DISPLAY APPARATUS AND IMAGE DISPLAY METHOD - An image display apparatus includes: a backlight configured to emit light; a liquid crystal panel configured to modulate light emitted from the backlight to make an image display; a backlight luminance calculating unit configured to calculate a light-emission luminance of the backlight such that a center value of a luminance range displayable on the liquid crystal panel defined depending on the light-emission luminance of the backlight substantially agrees with a center value of luminances of pixels forming an input image; a backlight controlling unit configured to control light emission of the backlight so that the light from the backlight is emitted with the calculated light-emission luminance; a luminance correcting unit configured to correct the luminance of each pixel in the input image in accordance with the calculated light-emission luminance; and a liquid crystal controlling unit configured to control modulation of the liquid crystal panel based upon the corrected input image. | 01-20-2011 |
20110025728 | IMAGE PROCESSING APPARATUS AND IMAGE DISPLAY APPARATUS - According to one embodiment, an apparatus includes following units. The image display unit includes a light source unit provided with light sources, each source being controlled respectively, and a liquid crystal panel displaying on a display area. The luminance calculation unit calculates a light source luminance of the light source based on a signal level of a divided area into which the display area virtually divided. The luminance distribution calculation unit calculates an entire luminance distribution of the light source unit. The transform unit transforms a signal level of the input image into a transformed image based on the entire luminance distribution. The luminance correction unit calculates a correction coefficient based on an average value or a sum of the light source luminance, and collects each of the light source luminance by the correction coefficient. The controller unit controls the liquid crystal panel and the light source unit. | 02-03-2011 |
20110043547 | VIDEO DISPLAY APPARATUS - According to one embodiment, a video display apparatus includes a liquid crystal panel configured to display a video on a display area and light sources, each configured to be controlled respectively and to light in an illumination area into which the display area is virtually divided according as arrangement of the light sources. The apparatus includes a first calculation unit configured to calculate a second emission intensity corresponding to a small-area based on a video signal in a small-area, wherein the small-area is segmented area of the display area and smaller than the illumination area. The apparatus includes a second calculation unit configured to calculate a first emission intensity to control the light source from the second emission intensities and a control unit configured to light the light sources at the first emission intensities. | 02-24-2011 |
20120182333 | IMAGE PROCESSING APPARATUS AND IMAGE DISPLAYING APPARATUS - There is provided an image displaying apparatus in which a light-source luminance calculator calculates light-source luminance of the light emitted by a backlight based on pixel values of an input image, a cumulative light-emission amount calculator calculates a cumulative light-emission amount by summing up light-source luminance for an arbitrary period for which an image is displayed at a time before the input image is displayed, the cumulative light-emission amount is compared with a reference light-emission amount determined in advance, and if the difference between the cumulative light-emission amount and the reference light-emission amount is smaller than a reference, a light-source luminance correcting unit corrects the light-source luminance to a smaller value to obtain corrected light-source luminance corrected. | 07-19-2012 |