Sharp Kabushiki Kaisha Corporation

Kohzoh Takahashi

Toshihiro Yanagi

Asahi Yamato

Taketoshi Nakano

Kiyoshi Nakagawa

Yuki Kawashima

Kohji Saitoh

Akizumi Fujioka

Jun Nakata

Fumiyuki Kobayashi

Ken Inada

Masami Ozaki

According to a liquid crystal display device (), a gate driver is controlled to (a) scan all of scan signal lines during at least two driving frames contained in a first driving period and (b) not scan any of the scan signal lines during pausing frames in a pausing period which is (i) secured between the first driving period and a second driving period by which the first driving period is followed and (ii) is longer than each of the first and second driving periods.

Liquid crystal display device with drive control circuit and method for driving same

A drive device of the present invention includes a VCOM selection circuit () for switching, before a display panel () is turned off, an electric potential of a counter electrode COM of each of pixels P from a VCOMto a VCOMwhich causes an electric potential of a drain electrode of each of the pixel P to be identical to the electric potential of the counter electrode COM after the display panel () is turned off.

Drive device and display device

A display device () includes (i) refresh rate changing means () for changing a refresh rate of a display panel () and (ii) a polarity reversal controlling section () for changing, in accordance with a change in the refresh rate, at least one of a temporal cycle and a spatial cycle of a polarity reversal of a source signal.

Display device with timing controller

Disclosed is a display device that (i) converts an input image formed of R, G, and B into a converted image formed of R, G, B, and W to display the converted image and that (ii) compresses the luminance of an input image for the subsequent frame on the basis of an adjustment value C which is corrected in correspondence with the number of, among all pixels in a converted image for the current frame, pixels in a state of luminance saturation and that then converts the input image into a converted image, the display device including a luminance oscillation detecting section () for detecting, while input images identical to each other are being inputted each as the above input image, whether converted images corresponding to the respective input images have an oscillating luminance, the display device, in the case where the luminance oscillation detecting section () has detected that the converted images have an oscillating luminance, stopping correction of the adjustment value C to fix the adjustment value C to a certain value, thereby preventing the converted images from having an oscillating luminance as a result of oscillation of the adjustment value C.

Display device and control method for display device

Provided is a display device capable of properly controlling a luminance of a backlight on the basis of a plurality of factors. The display device is a display device () which includes a BL luminance control signal generating block () for generating a BL luminance control signal for controlling a luminance of a backlight unit (). The BL luminance control signal generating block () (i) receives a plurality of BL luminance parameters regarding the luminance of the backlight unit (), (ii) carries out a calculation process with respect to the plurality of BL luminance parameters and (iii) generates the BL luminance control signal on the basis of a result of the calculation process.

Display device, and brightness control signal generation method

In an intermittent drive mode of a display device in which driving and pausing of the driving are repeated, an image identification section identifies an input image as a still image or a moving image. In a case where the moving image is identified, a drive/pause control section generates a drive/pause control signal with a period ratio in accordance with the moving image. A timing control section generates a driver control signal so that intermittent driving is carried out. Then, a source driver and a gate driver drives a display section so that the drive period and the pause period are repeated with a predetermined period ratio, so that the input image is displayed. The drive/pause control section sets a time ratio between the drive period and the pause period to be variable for each of the moving image and the still image.

Display device and method for driving same

A display device of the present invention includes (i) a BL control parameter calculating section () for calculating a BL control parameter on the basis of an input image, (ii) a BL luminance control signal generating block () for generating a BL luminance control signal on the basis of the BL control parameter and (iii) an output section () for supplying, to the BL luminance control signal generating block (), a BL control parameter that has been calculated by the BL control parameter calculating section () immediately before a suspension time period during which a display controlling section is being suspended.

Display device, and display method

A display device includes: a timing controller () for driving a scanning line driving circuit () and a signal line driving circuit () by providing a scanning period (T) and a pause period (T) which follows the scanning period (T); a data analyzing section () for obtaining detection data on an external light intensity; and a BL luminance setting section () for outputting, at least during the pause period (T), a BL control signal for adjusting, in accordance with the detection data obtained by the data analyzing section (), a luminance of light to be emitted to a screen.

Display device, drive method thereof, and electronic device

In one embodiment of the present invention, when a still image is displayed, applied voltages respectively corresponding to a total of n (n being an integer of not less than 4) types of gradationto (n&#x2212;1) are outputted to pixels. When a moving image is displayed, an applied voltage corresponding to a predetermined gradation m (1&#x2266;m&#x2266;(n&#x2212;2)) is applied to the pixels instead of applied voltages respectively corresponding to gradations of less than the predetermined gradation m. Overdrive driving is performed with respect to a total of n types of gradation.

Method for driving liquid crystal display apparatus

Disclosed is an image display device including an image signal input section (), an overshoot operation section () that, when an image signal is inputted from outside one frame at a time, corrects the gradation level of the inputted image signal for a frame, a frame memory () that stores the corrected image signal of the frame, and a sub-frame division processing section () that time-divides the corrected and stored image signal of the frame into a plurality of sub-frame periods. The overshoot operation section () corrects the gradation level of an image signal of a frame according to a relation between the corrected gradation level of the image signal of a frame immediately preceding the frame, which is stored of the frame memory (), and the gradation level of the image signal of the frame. Thus, the costs can be reduced, the device can be made compact, and the power consumption can be suppressed.

Image display device and image display method

In one embodiment of the present invention, when a still image is displayed, applied voltages respectively corresponding to a total of n (n being an integer of not less than 4) types of gradation 0 to (n&#x2212;1) are outputted to pixels. When a moving image is displayed, an applied voltage corresponding to a predetermined gradation m (1&#x2266;m&#x2266;(n&#x2212;2)) is applied to the pixels instead of applied voltages respectively corresponding to gradations of less than the predetermined gradation m. Overdrive driving is performed with respect to a total of n types of gradation.

In one embodiment of the present invention, when a still image is displayed, applied voltages respectively corresponding to a total of n (n being an integer of not less than 4) types of gradation 0 to (n&#x2212;1) are outputted to pixels. On the other hand, when a moving image is displayed, an applied voltage corresponding to a predetermined gradation m (1&#x2266;m&#x2266;(n&#x2212;2)) is applied to the pixels instead of applied voltages respectively corresponding to gradations of less than the predetermined gradation m.

A control section () merely passes an incoming image data signal DAT onto a source driving section for display driving during the display of a still image. During the display of a moving image, the control section () converts, using a computing section () and a look-up table (), a grayscale level signal in the incoming image data signal DAT to a grayscale level signal that is obtainable without using those application voltages at which the response speed of liquid crystal is slow. The control section () then outputs the resultant grayscale level signal to the source driving section for display driving.

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Osaka, Japan

Kohzoh Takahashi