Liquid crystal display device, driving control circuit and driving method used in same

Abstract

A liquid crystal display device is provided which is capable of improving quality of moving images. A field dividing driving operation is performed in which an odd field during which each of scanning electrodes in odd-numbered rows is sequentially driven and an even field during which each of scanning electrodes in even-numbered rows is sequentially driven occur, alternately and repeatedly, with time width of a refresh rate. In the former half of the odd field, display data is written in each of pixel regions corresponding to scanning electrodes in odd-numbered rows and, in the latter half of the odd field, black data is written in each of the pixel regions corresponding to scanning electrodes in the odd-numbered rows. In the former half of the even field, display data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows and, in the latter half of the even field, black data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows.

Description

technical field [0001] The invention relates to a liquid crystal display device, a driving control circuit and a driving method used in the liquid crystal display device, especially a liquid crystal display device suitable for displaying dynamic images, a driving control circuit and a driving method used in the liquid crystal display device. [0002] This application claims the priority of Japanese Patent Application No. 2006-101252 filed on March 31, 2006 and No. 2006-159001 filed on June 7, 2006, which are incorporated herein by reference. Background technique [0003] In recent years, liquid crystal display devices have been used not only as displays for personal computers but also for various displays such as liquid crystal televisions. In the case of being used in a TV, etc., the performance of displaying moving images is required. However, in the existing liquid crystal display device, when displaying moving images, the following image is displayed when the current ima...

AI Technical Summary

Problems solved by technology

That is, in the liquid crystal display device of FIG. 18, compared with the case where the black insertion drive is not performed, there is a problem that since the operating frequency of each part is multiplied, a corresponding hardware configuration is required, resulting in an increase in scale and low power consumption. additional questions

Moreover, in this liquid crystal display device, the scanning electrode lines are driven sequentially, as shown in FIG. 20 , the voltage polarity of the display data D of each row is reversed, and the reversed mode is reversed at each refresh rate. , so depending on the area of ​​the LCD panel, there will be a voltage polarity deviation of the displayed data, and the problem of burning the screen will occur

In addition, although the smearing of the animation is improved by the black insertion drive, there is a problem that the flickering feeling of the screen is increased because the black display and the video display alternately appear in a frequency band that can be recognized by humans. In order to suppress the flickering feeling, the refresh rate is increased. To a frequency band that cannot be recognized by humans, the operating frequency doubled due to the black insertion driver must be doubled again, which is very difficult in the hardware structure

[0009] In addition, in the driving method described in Japanese Patent Application Laid-Open No. 04-044478, since alternate driving is performed, the operating frequency of each part is very low. The black data is written into each pixel area at the same time, and in the second half of the even field, the black data is written into each pixel area corresponding to all the scan electrodes of the even line at the same time, so the storage time of the liquid crystal in each line is different, and the display will appear There is a problem of brightness difference between the top and bottom of the screen

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