摘要:
In one embodiment of the present invention, a large-screen or high-definition LCD is provided with its display quality improved significantly by reducing the viewing angle dependence of γ characteristic. Each pixel includes first and second subpixels, to which different voltages are applicable. The device further includes electrically independent storage capacitor trunks, each being electrically connected to the respective storage capacitor counter electrodes of either the first or second subpixels through storage capacitor lines. One vertical scanning period (V-Total) of an input video signal is divided into at least two subframes, in each of which a display signal voltage is written on each pixel. Two consecutive vertical scanning periods of the input video signal include a sequence in which the display signal voltage is written at the same polarity in two consecutive subframes and then has its polarity inverted in the next subframe. A storage capacitor counter voltage has, in each subframe, a first waveform, oscillating in a first cycle time PA, which is an integral number of times (and at least twice) as long as one horizontal scanning period (H), and a second waveform, defined such that the effective value of the CS voltage storage capacitor counter voltage has a predetermined constant value every predetermined number of consecutive vertical scanning periods of the input video signal. Between two subframes in which the polarity of the CS voltage is inverted, the first waveforms of the CS voltage storage capacitor counter voltages have a phase difference of 180 degrees.
摘要翻译:在本发明的一个实施例中,通过降低伽马特性的视角依赖性,提供了大屏幕或高分辨率LCD,其显示质量显着提高。 每个像素包括可应用不同电压的第一和第二子像素。 该装置还包括电独立的存储电容器中继线,每个通过存储电容线与第一或第二子像素的各个存储电容器对电极电连接。 输入视频信号的一个垂直扫描周期(V-Total)被划分为至少两个子帧,其中每个子帧在每个像素上写入显示信号电压。 输入视频信号的两个连续的垂直扫描周期包括其中显示信号电压在两个连续子帧中以相同极性写入然后在下一个子帧中被反转的序列。 存储电容器对电压在每个子帧中具有第一波形,该第一波形在第一周期时间P A A A中振荡,该第一周期时间是整数倍(至少两次),只要一个水平扫描 周期(H)和第二波形,其被定义为每当预定数量的输入视频信号的连续垂直扫描周期时,CS电压存储电容器对电压的有效值具有预定的常数值。 在其中CS电压的极性反转的两个子帧之间,CS电压存储电容器对电压的第一波形具有180度的相位差。
摘要:
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.
摘要:
Data signal lines, scanning signal lines, and pixels are formed in each of first and second regions of a liquid crystal panel, and the first half of a current frame and the second half of the current frame are written to the first and second regions, respectively. A data signal with polarity inverted for each vertical scanning period is supplied to each data signal line. A scanning direction of the first region is identical to a scanning direction of the second region and the first and second regions are arranged to line up in this order in the scanning direction. In the first and second regions, the potential of the data signal is corrected according to a distance from a scanning start end portion.
摘要:
A display control circuit of a liquid crystal display device generates a double-speed progressive image signal by changing an input image signal based on interlaced scanning into a progressive scanning mode, and also by doubling the frame frequency. With the double-speed progressive image signal, a pixel value equivalent to an odd-numbered scanning line in an odd-numbered frame remains unchanged, a pixel value equivalent to an even-numbered scanning line is replaced with a black pixel value, a pixel value equivalent to an even-numbered scanning line in an even-numbered frame remains unchanged, and a pixel value equivalent to an odd-numbered scanning line is replaced with a black pixel value. An image that the double-speed interlace image signal represents is displayed on a liquid crystal panel.
摘要:
A display control circuit of a liquid crystal display device generates a double-speed progressive image signal by changing an input image signal based on interlaced scanning into a progressive scanning mode, and also by doubling the frame frequency. With the double-speed progressive image signal, a pixel value equivalent to an odd-numbered scanning line in an odd-numbered frame remains unchanged, a pixel value equivalent to an even-numbered scanning line is replaced with a black pixel value, a pixel value equivalent to an even-numbered scanning line in an even-numbered frame remains unchanged, and a pixel value equivalent to an odd-numbered scanning line is replaced with a black pixel value. An image that the double-speed interlace image signal represents is displayed on a liquid crystal panel.
摘要:
A liquid crystal display apparatus includes a plurality of areas in which response speeds greatly different from each other coexist in a pixel. A first replacement process section replaces the image data of the desired target frame with a first gradation, when a gradation transition from a current frame to a desired target frame corresponds to the above gradation transition. A second replacement process section replaces the image data of the current frame with a second value. The first value is set to a value causing the pixel to respond at a relatively higher speed without the occurrence of the excessive brightness. Without avoiding the deterioration of the image, it is possible to drive a liquid crystal display apparatus including areas whose response speeds are different from each other coexist in the pixel, such as a liquid crystal display apparatus of vertically aligned mode and normally black mode.
摘要:
In one embodiment of the present invention, a drive unit of a display device is a drive unit that drives a display device in which one frame is divided into a plurality of sub-frames so that display of input video data is realized by summation of displays of the sub-frames, and the drive unit includes: a sub-frame data generating section generating sets of sub-frame data corresponding to the respective sub-frames; and a sub-frame period fixing section setting at least one sub-frame period to a given value regardless of a type of the input video data. This makes it possible to prevent variations of display quality with respective to various kinds of input video signals.
摘要:
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. There are provided: an incoming signal interpolating section which interpolate each of pixels based on incoming color signal components of red (R), green (G), and blue (B) at least in a vertical scanning direction to generate interpolated RGB signals; a luminance signal converting section which converts color signals of interpolated sub-pixels, which are obtained from the incoming signal interpolating section, into luminance signals; an another color luminance component adding section which adds a luminance signal component of at least one other color on a basis of luminance signal components of colors of red (R), green (G), and blue (B), which components are outputted from the luminance signal converting section; and a luminance reallocating section which reallocates luminance signals of peripheral interpolated sub-pixels, for a color of each of the color filters corresponding to the sub-pixels, in accordance with output from the another color luminance component adding section.
摘要:
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. As a result, it is possible to suppress shortening of life of emitters in an illuminating section, and to relieve lowering of luminance of the emitters, and also to obtain a desirable display quality even in a fast-moving image.
摘要:
A liquid crystal display of the present invention facilitates grayscale level transition from a previous frame to a current frame, in such a manner that a modulation driving process section reads out, from one look-up table, corrected image data corresponding to a combination of image data of a previous frame and image data of a current frame and then outputs this corrected image data, irrespective of the ambient temperature. Meanwhile, a temperature circuit controls a heater so as to either stop the heating by the heater when a temperature of the liquid crystal panel exceeds a threshold value which is 1° C. through 1.5° C. higher than a target temperature, or start the heating by the heater when the temperature of the liquid crystal panel goes below a threshold value which is 1° C. through 1.5° C. lower than the target temperature, the target temperature being determined in advance to be in a range between 48° C. and 63° C. In this manner, it is possible to realize a liquid crystal display which is simple in circuit arrangement but can improve a response speed while restraining the degradation of display quality to be hardly recognizable for the viewer.