Abstract: In a liquid crystal display apparatus realizing a dual view display by bonding a liquid crystal panel and a parallax barrier, the parallax barrier separates display images by treating three pixels including R, G, and B pixels as one unit (one picture element). At this time, luminance variation due to crosstalk concentrates on a right-end pixel among the three pixels constituting the one picture element (in a case where each pixel receives data from a source line immediately on the left of the pixel). Accordingly, the right-end pixel is arranged to be a B pixel that has a low correlation with luminance information and in which influence of crosstalk is hard to be viewed. Further, an applied voltage to be supplied to the display pixel of the B (blue) color and an input gradation are set to have a relationship along a ? curve that makes luminance variation difficult to occur in a low luminance area.

Abstract: The present invention is arranged such that interlace image data, which has been supplied, is converted to progressive image data in an I/P conversion section, and the image data converted to progressive style in the I/P conversion section is subjected to image processing including data comparison in spatial or time series manner, in an image processing section.

Abstract: The cold cathode tube for illuminating pixels with light which is in accordance with an output signal has luminance which gradually increases at a rise and gradually decreases at a fall per one frame time. The cold cathode tube contains a fluorescent material of only one of three primary colors of light, and has a certain OFF period or dimming period per one frame time. Between a diffusing plate and a reflecting plate are provided partition walls for parting emitting areas, so that the illumination light of one cold cathode tube does not reach the display elements to be illuminated by the other cold cathode tubes. The emission of each display element is changed per one frame time between a normal ON state and a dim state. The cold cathode tube has two or more OFF periods within one frame time, and luminance of the cold cathode tube is changed per one frame period.

Abstract: In one embodiment of the present invention, in the case of dark display on sub-pixels, a sub-frame processing section is disclosed which sets video data for a sub-frame to a value falling within the range for dark display, and increases or decreases video data for a sub-frame so as to control luminance of the sub-pixels. In the case of bright display, the sub-frame processing section sets video data to a value falling within the range for bright display, and increase or decreases video data so as to control luminance of the sub-pixels. A modulation processing section corrects video data of each frame and then outputs corrected video data to the sub-frame processing section. Also, the modulation processing section predicts luminance that the sub-pixels reach at the end of the frame and then stores prediction results for correction and prediction in the subsequent frame.

Abstract: A color display device determines a relationship between RGB components of an input color image signal in terms of their gradation levels, and carries out a different calculation for each input color image signal depending on which of six patterns of the relationship that the input color image signal belongs to. Further, the color display device carries out the calculation for each of the RGB components excluding a component with a smallest gradation level, using variables that vary depending on the respective gradation levels of the RGB components.

Abstract: The vertical scan period of the input video signal is divided into at least two sub-frames. In each of the sub-frames, a display signal voltage is written into each pixel. Two vertical scan periods in which the input video signals are continuous contain a sequence of two continuous sub-frames where a display signal voltage is written with the same polarity and a sub-frame where the polarity of the display signal voltage is inversed. The auxiliary capacity opposing voltage includes, in each of the sub-frames, a first waveform vibrating with a first cycle of the horizontal scan period multiplied by an integer not smaller than 2 and a second waveform in which an effective value of the auxiliary capacity opposing voltage is set to a predetermined constant value for each vertical scan period of a predetermined number of continuous input video signals.

Abstract: In a liquid crystal display apparatus realizing a dual view display by bonding a liquid crystal panel and a parallax barrier, the parallax barrier separates display images by treating three pixels including R, G, and B pixels as one unit (one picture element). At this time, luminance variation due to crosstalk concentrates on a right-end pixel among the three pixels constituting the one picture element (in a case where each pixel receives data from a source line immediately on the left of the pixel). Accordingly, the right-end pixel is arranged to be a B pixel that has a low correlation with luminance information and in which influence of crosstalk is hard to be viewed. Further, an applied voltage to be supplied to the display pixel of the B (blue) color and an input gradation are set to have a relationship along a ? curve that makes luminance variation difficult to occur in a low luminance area.

Abstract: A driving system of the present invention for use in a displaying device is provided with a pseudo bit-depth extension section. In the pseudo bit-depth extension section, a noise pattern is added to upper-n-bit data of an input signal D0 in m-bit, where (i) m is an integer of 9 or greater, and (ii) n is an integer of 8 or greater, but less than m. Then, upper-n-bit of data D1 thus obtained from the D0 is outputted, as output data D2, from the pseudo bit-depth extension section. The driving system is further provided with an overshoot-driving section for carrying out an overshoot-driving with respect to each of pixels. A noise amount of the noise pattern is 1 or less in 8-bit data, and a calculation in the overshoot-driving section is carried out with n-bit data.

Abstract: A modulation processing section compares video data of a current frame and a previous frame representative value supplied from a frame memory, corrects the video data so that a gradation transition from a gradation indicated by the previous frame representative value to a gradation indicated by the video data is emphasized, and outputs the corrected video data. A judgment section compares both of the data and judges, out of a value calculated from the previous frame representative value by a representative value generating section and the video data, which is to be stored in the frame memory till a next frame begins. This allows for realizing a liquid crystal display device capable of preventing with a relatively small-scale circuit (alternatively, a relatively small amount of calculation) a phenomenon such that: although a response speed of a pixel is improved, the emphasis modulation and a response delay of the pixel are combined so that image quality in displaying moving images deteriorates.

Abstract: A display panel is designed such that a pixel including sub-pixels indicative of red (R), green (G), blue (B) and at least one other color includes two sub-pixels at least in a longitudinal scanning direction and a color filter is provided for each of the sub-pixels. A driving device for the display panel includes a polarity reversal control section for performing polarity reversal drive with respect to every two dots in a lateral scanning direction and for performing polarity reversal drive with respect to every two lateral lines in a longitudinal scanning direction.

Abstract: The present invention is arranged such that interlace image data, which has been supplied, is converted to progressive image data in an I/P conversion section, and the image data converted to progressive style in the I/P conversion section is subjected to image processing including data comparison in spatial or time series manner, in an image processing section.

Abstract: A display panel is the one in which a pixel composed of sub-pixels of red (R), green (G), blue (B), and at least one other color has two sub-pixels at least in a vertical scanning direction, and color filters are provided respectively corresponding to the sub-pixels.

Abstract: A control section divides a display screen into small regions, evaluates the relative brightness of each of the small regions in accordance with color data to be inputted as color data by which each pixel is displayed, and determines whether or not the display screen has a first small region that is brighter than the other small regions by a predetermined degree. Furthermore, the control section causes a first generating means to generate gradation data for use in the first small region, and causes a second generating means to generate gradation data for use in the other small regions. Even if the second generating section receives the same color data as the first generating section does, the second generating section limits the luminance of a W sub-pixel as compared to the first generating section. With this, the first small region can be displayed more strikingly brightly, so that a clearer, more realistic, and more appealing image can be displayed.

Abstract: The present invention relates to a hold type display device. One frame period that is a period when an image of one screen is displayed is divided into a dark display period when a relatively dark image is displayed and a bright display period when a relatively bright image is displayed. In the dark display period, each of scanning signal lines (GL1, GL2, GL3, etc.) is driven consecutively two times each during a period corresponding to one third of a conventional one horizontal scanning period. Also, in the dark display period, each two lines of the scanning signal lines (GL1, GL2, GL3, etc.) is driven at the same time. A gradation is calculated for generating a video signal such that, at two pixel formation portions arranged at intersections of these two scanning signal lines driven at the same time and a video signal line, a luminance averaged from luminances originally to be appeared at the two pixel formation portions appears.

Abstract: Based on each of video data repeatedly supplied to a pixel, a signal processing section generates video data (Dd) for an image display period to be supplied to the pixel and video data (Db) for a blanking period to be supplied to the pixel, and outputs the video data (Dd) and (Db) in a predetermined order. Further, when a gradation transition from a gradation indicated by previous video data (D(i,j,k?2)) supplied to the pixel to a gradation indicated by current video data (D(i,j,k)) supplied to the pixel indicates an increase in luminance, a generating circuit for a blanking period of the signal processing section outputs video data indicative of a gradation which is increased compared with a gradation indicated by gradation data for a blanking period in a steady state, the video data thus outputted being regarded as video data (Db(i,j,k?1)) for a blanking period. This allows for providing a display device capable of displaying moving images with high quality.

Abstract: The cold cathode tube for illuminating pixels with light which is in accordance with an output signal has luminance which gradually increases at a rise and gradually decreases at a fall per one frame time. The cold cathode tube contains a fluorescent material of only one of three primary colors of light, and has a certain OFF period or dimming period per one frame time. Between a diffusing plate and a reflecting plate are provided partition walls for parting emitting areas, so that the illumination light of one cold cathode tube does not reach the display elements to be illuminated by the other cold cathode tubes. The emission of each display element is changed per one frame time between a normal ON state and a dim state. The cold cathode tube has two or more OFF periods within one frame time, and, luminance of the cold cathode tube is changed per one frame period.

Abstract: Each of the upscaling circuits (12a through 12d) which receives divided image data includes: a difference circuit (31) for calculating a gradation value of a target pixel with use of differentiation or difference of gradation values in vicinity to the target pixel, so that an edge of an article pictured in an image can be extracted; an averaging circuit (34) for calculating a gradation value of a target pixel by averaging gradation values in vicinity to the target pixel; and a correlation operation circuit (35) which calculates a correlation value indicative of a correlation between difference image data and averaged image data, the difference image data being produced by carrying out the difference operation process on the divided image data, and the averaged image data being produced by carrying out the difference operation process and the averaging process on the divided image data.

Abstract: A liquid crystal driving circuit controls operations of display areas in a liquid crystal display panel based on a plural pieces of divided image data which are prepared by dividing image data for a single screen in accordance with the display areas in the liquid crystal display panel. In response to an luminance signal corresponding to an LED resolution generated by an LED resolution signal generating circuit based on image data for a single screen which is not divided, the LED driving circuit controls operations of LEDs provided in a backlight unit. With the configuration of at least one embodiment, according to a liquid crystal display device including a backlight, in a case where display image data for a single screen is divided into a plural pieces of divided image data for a plurality of areas of a display screen and images to be displayed in the plurality of areas are controlled based on the plural pieces of divided image data, display quality in a border area of the plurality of areas can be improved.

Abstract: At least one embodiment of the present invention relates to a liquid crystal display device including a liquid crystal display panel and a backlight unit having light sources arranged in back of the liquid crystal display panel. Image data obtained by adding a dummy image to a periphery of inputted image data is divided into blocks which correspond to positions of LEDs. A light-emitting luminance of an LED in an image display area, in which an image corresponding to the inputted image data is displayed, is determined in accordance with a maximum value among gradation values of pixels included in a block corresponding to the LED.

Abstract: There is provided a motion-adaptive grayscale level converter section between a video signal source and a pixel array. The pixel array includes a liquid crystal cell of normally black and vertically aligned mode. The motion-adaptive grayscale level converter section determines based on information from a decoder section whether the pixels of an image represented by a video signal is in a moving image area. If a pixel is in a moving image area, the motion-adaptive grayscale level converter section changes the grayscale level data representing the grayscale level of the pixel so that there is no darker grayscale level than a predetermined first grayscale level. The resultant data is output as a video signal. Accordingly, we can provide a liquid crystal display capable of easing image quality degradation due to insufficient response when displaying a moving image while maintaining the contrast ratio achieved for a still image display.