Liquid crystal display with dummy stages in shift register and its clock signal operation

#The present application is a National Phase of International Application Number PCT/JP2011/075267, filed Nov. 2, 2011, and claims priority from Japanese Application Number 2010-251578, filed Nov. 10, 2010.

#The present invention relates to a liquid crystal display device, and more specifically relates to a liquid crystal display device having a configuration where one pixel is divided into a plurality of sub-pixels in order to improve visual field angle characteristics.

#As one of drive systems of a liquid crystal display device, there is conventionally known a system in which “one pixel is configured by a plurality of (typically, two) sub-pixels, and liquid crystal is driven such that the plurality of sub-pixels have different luminance from each other” (hereinafter referred to as a “pixel division system”). This pixel division system is a system to be adopted for improving visual field angle characteristics of the liquid crystal display device. It is to be noted that, hereinafter, a region forming one pixel (each of three-color pixels of R, G and B in the case of a liquid crystal display device where a color display is performed by using the three-color pixels of R, G and B) is referred to as a “pixel section”, and a region forming a sub-pixel is referred to as a “sub-pixel section”.

#FIG. 1 is a block diagram showing a configuration of the inside of a liquid crystal panel in an active matrix-type liquid crystal display device according to an embodiment of the present invention.

#FIG. 2 is a block diagram showing a whole configuration of the liquid crystal display device in the above embodiment.

#FIG. 3 is a circuit diagram showing a configuration of a pixel section inside the display section in the above embodiment.

#Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. It is to be noted that in the following description, a gate terminal (a gate electrode) of a thin-film transistor corresponds to the control terminal, a drain terminal (a drain electrode) thereof corresponds to the first conduction terminal, and a source terminal (a source electrode) thereof corresponds to the second conduction terminal. Further, a description will be given assuming that all the thin-film transistors are of an n-channel type.

#<1. Whole Configuration and Operation>

#FIG. 2 is a block diagram showing a whole configuration of an active matrix-type liquid crystal display device in an embodiment of the present invention. As shown in FIG. 2, this liquid crystal display device is provided with a liquid crystal panel 100 including a display section 102 and gate drivers (a first gate driver 110L and a second gate driver 110R), a display control circuit 200, a source driver (video signal line drive circuit) 300, and an auxiliary capacitance wiring driver 400. The source driver 300 is mounted on a glass substrate in the form of IC chips. On the other hand, the gate driver, is monolithically formed on the glass substrate inside the liquid crystal panel 100.