Abstract: An active matrix substrate includes: a substrate; TFTs supported on the substrate; and an inorganic insulating layer which covers the TFTs. Each TFT includes a gate electrode provided on the substrate, a gate insulating layer which covers the gate electrode, an oxide semiconductor layer provided on the gate insulating layer, and a source electrode and a drain electrode connected to the oxide semiconductor layer. The gate insulating layer includes a first silicon nitride layer and a first silicon oxide layer which is provided on the first silicon nitride layer. The inorganic insulating layer includes a second silicon oxide layer and a second silicon nitride layer which is provided on the second silicon oxide layer.

Abstract: In one embodiment of the present invention, a driving method of a liquid crystal display device is disclosed.

Abstract: In a method of driving a liquid crystal panel, an overshoot signal is applied to the liquid crystal panel to display images on the liquid crystal panel. An overshoot level C is selected from a plurality of overshoot levels Dn. In this selecting, difference values between momentary values of a response waveform gn and momentary values of an ideal waveform f are obtained and added for a predetermined period and a minimum first error value E1 is obtained. One of the overshoot levels Dn corresponding to the response waveform gn having the minimum first error value E1 is selected as the overshoot level C. One of the overshoot levels Dn is selected by using an average value from the values obtained for the predetermined period similarly to humans' recognition of the liquid crystal display element. Accordingly, tailing or an image failure is less likely to occur.

Abstract: A method of driving a liquid crystal panel includes setting a gradation voltage corresponding to each gradation level with using a setting gamma function, and selecting the gradation voltage from a group of gradation voltages corresponding to a gradation level of the signal with using a selecting gamma function. A gamma value of the setting gamma function is different from a gamma value of the selecting gamma function. According to the driving method, if the gradation voltage that easily causes tailing or an image failure and the gradation voltage that hardly causes tailing or an image failure are applied to the display according to the gradation level of the input data signal, the gamma value of the setting gamma function is adjusted and unevenness is less likely to be caused by the gradation voltage. Accordingly, tailing or an image failure is less likely to occur.

Abstract: A stereoscopic video image display method according to the present invention is such that in a case where switching between a right-eye image and a left-eye image, both of which accommodate a parallax that allows an observer to visually recognize a stereoscopic video image, is done once, for example, every two frames, a gray scale transition emphasis process is carried out in each of the frames, and that in a case where, in a visual recognition period (e.g. frame F2) during which the observer is allowed to visually recognize a stereoscopic video image, display luminance of a target pixel which belongs to a parallax region is made transition from display luminance corresponding to 160 gray scale to display luminance corresponding to 32 gray scale, a gray scale transition emphasis process is carried out so that an average luminance during the visual recognition period becomes substantially equal to the display luminance corresponding to 32 gray scale.

Abstract: In one embodiment, a display panel driving apparatus which generates, based on an input gray scale, a gray scale of a first sub-frame and a gray scale of a second sub-frame so as to display the input gray scale as a result of a summation of respective display corresponding to the first sub-frame and the second sub-frame into which one frame is divided, and the gray scale of the second sub-frame being greater than the gray scale of the first sub-frame, for a response in which the input gray scale of a subsequent frame is greater than an input gray scale of a previous frame and the input gray scale of the subsequent frame is not less than a first threshold gray scale, a gray scale of the first sub-frame in the subsequent frame is set not more than a second threshold gray scale, regardless of input gray scale of the subsequent frame. Thus, it is possible to reduce jaggy in an edge of a moving image in time-division driving.

Abstract: In a display panel driving apparatus which generates, based on an input gray scale, a gray scale of a first sub-frame and a gray scale of a second sub-frame so as to display the input gray scale as a result of a summation of respective display corresponding to the first sub-frame and the second sub-frame into which one frame is divided, and the gray scale of the second sub-frame being greater than the gray scale of the first sub-frame, for a response in which (i) the input gray scale of a subsequent frame is greater than an input gray scale of a previous frame and (ii) the input gray scale of the subsequent frame is not less than a first threshold gray scale, a gray scale of the first sub-frame in the subsequent frame is set not more than a second threshold gray scale, regardless of input gray scale of the subsequent frame. Thus, it is possible to reduce jaggy in an edge of a moving image in time-division driving.

Abstract: In a display panel driving apparatus which generates gray scales corresponding to first through nth sub-frames into which one frame is divided, and drives a display panel based on the gray scales thus generated, in a rising response in which a gray scale of a previous frame is Tf and a gray scale of a subsequent frame is Tr, T1 and T2 satisfy inequalities (i) T1?Tf, (ii) T2?Tr, and (iii) T1?Tf<T2?T1, where T1 is a gray scale generated so as to correspond to a first sub-frame of the subsequent frame, and T2 is a gray scale generated so as to correspond to any one of a second through nth sub-frames of the subsequent frame. This thus provides a display panel driving apparatus capable of reducing jaggy at an edge of a moving image on a display panel.

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: In a display panel driving apparatus which generates, based on an input gray scale, a gray scale of a first sub-frame and a gray scale of a second sub-frame so as to display the input gray scale as a result of a summation of respective display corresponding to the first sub-frame and the second sub-frame into which one frame is divided, and the gray scale of the second sub-frame being greater than the gray scale of the first sub-frame, for a response in which (i) the input gray scale of a subsequent frame is greater than an input gray scale of a previous frame and (ii) the input gray scale of the subsequent frame is not less than a first threshold gray scale, a gray scale of the first sub-frame in the subsequent frame is set not more than a second threshold gray scale, regardless of input gray scale of the subsequent frame. Thus, it is possible to reduce jaggy in an edge of a moving image in time-division driving.

Abstract: In one embodiment of the present invention, a driving method of a liquid crystal display device is disclosed.

Abstract: In one embodiment, a display panel driving apparatus which generates, based on an input gray scale, a gray scale of a first sub-frame and a gray scale of a second sub-frame so as to display the input gray scale as a result of a summation of respective display corresponding to the first sub-frame and the second sub-frame into which one frame is divided, and the gray scale of the second sub-frame being greater than the gray scale of the first sub-frame, for a response in which the input gray scale of a subsequent frame is greater than an input gray scale of a previous frame and the input gray scale of the subsequent frame is not less than a first threshold gray scale, a gray scale of the first sub-frame in the subsequent frame is set not more than a second threshold gray scale, regardless of input gray scale of the subsequent frame. Thus, it is possible to reduce jaggy in an edge of a moving image in time-division driving.

Abstract: In one embodiment of a display device, pixels are arranged in matrix, and a first luminance area (high luminance area) and a second luminance area (low luminance area) which surrounds the first luminance area and has a luminance lower than that of the first luminance area can be formed in each pixel. The display device which can clearly display an image having a high spatial frequency and an active matrix substrate to be used for the display device are provided.

Abstract: The liquid crystal display device of the invention includes: a liquid crystal layer taking on a roughly vertically aligned state in the black display state: first and second polarizing plates placed to face each other so that the transmission axes are orthogonal to each other; at least one first phase plate placed between the liquid crystal layer and the first polarizing plate and/or the second polarizing plate; at least one second phase plate placed between the first phase plate and the first or second polarizing plate whichever is farther from the first phase plate; and an illuminator for illuminating the liquid crystal layer with light via the first or second polarizing plate.

Abstract: A modulation unit is disclosed which compares video data on a current frame to a representative value of the preceding frame from a frame memory and corrects the video data so as to emphasize the gradation transition from the gradation indicated by the representative value of the preceding frame to the gradation indicated by the video data when outputting the video data. Furthermore, a judgment unit compares the both data and judges which of the value calculated from the frame representative value by the representative value generation unit and the video data is to be stored in the frame memory until the next frame. Thus, it is possible to realize a liquid crystal display device having a comparatively small circuit size (or calculation amount) for suppressing the phenomenon of image quality lowering upon display of a moving picture caused by the synergistic effect between the emphasis modulation and the pixel response shortage even when the pixel response speed is increased.

Abstract: The liquid crystal display device of the present invention includes a first substrate, a second substrate, and a liquid crystal layer sandwiched by the first and second substrates. The first substrate includes polymer walls made of a transparent resin, the liquid crystal layer has a plurality of liquid crystal regions separated from one another by the polymer walls, and liquid crystal molecules in the plurality of liquid crystal regions are aligned axially symmetrically with respect to respective axes formed in the plurality of liquid crystal regions, the axes being vertical to a surface of the first substrate, and liquid crystal molecules above the polymer walls are aligned axially symmetrically with respect to respective axes formed on the polymer walls, the axes being vertical to the surface of the first substrate.

Abstract: The liquid crystal display device of the invention includes: a liquid crystal layer taking on a roughly vertically aligned state in the black display state: first and second polarizing plates placed to face each other so that the transmission axes are orthogonal to each other; at least one first phase plate placed between the liquid crystal layer and the first polarizing plate and/or the second polarizing plate; at least one second phase plate placed between the first phase plate and the first or second polarizing plate whichever is farther from the first phase plate; and an illuminator for illuminating the liquid crystal layer with light via the first or second polarizing plate.

Abstract: A liquid crystal display device can be improved in orientation by exploiting axially symmetrical orientation. The liquid crystal display device includes a pair of substrates arranged facing each other with a pre-set gap in-between, liquid crystals held in the gap, a unit for applying an electrical field to the liquid crystals to change its state of orientation, a wall structure formed in each of small-sized areas obtained on sub-division along at least one substrate for orienting the liquid crystals lying in each small-sized area axially symmetrically on application of the electrical field, and a groove structure formed in each of the small-sized areas and adapted for adjusting the axial symmetrical orientation of the liquid crystals in cooperation with the wall structure.