Abstract: In the case of an active matrix type TFT liquid crystal display apparatus of a dot successive driving system, between respectives of signal lines sig1A through sig4A wired at respective columns, and respectives of a signal line 18-1A for inputting a precharge signal Psig-black at a black level and a precharge signal line 18-2A for inputting a precharge signal Psig-gray at a gray level, sampling switches Pb1A through Pb4A and Pg1A through Pg4A of two routes are connected, to respectives of the signals lines sig1A through sig4A, firstly, the precharge signal Psig-black, successively, the precharge signal Psig-gray at the gray level are written in this order and thereafter, an image signal video is written thereto.

Abstract: A digital-signal-processing circuit comprising an LUT memory used for storing a gamma-correction LUT used for carrying out gamma correction on an input digital video signal, and a front-stage signal-processing unit provided at a stage preceding the LUT memory and used for carrying signal processing, such as contrast adjustment, after the input digital video signal having a typical width of 8 bits is subjected to signal processing, such as contrast adjustment, in the signal-processing unit to be transformed into a digital video signal with a width of 11 bits. The 11-bit digital video signal is supplied to the LUT memory having an output bit count of 10 bits, which is smaller than the 11-bit width of the digital video signal supplied to the LUT memory but greater than the 8-bit width of the digital video signal input to the signal-processing unit.

Abstract: In the case of an active matrix type TFT liquid crystal display apparatus of a dot successive driving system, between respectives of signal lines sig1A through sig4A wired at respective columns, and respectives of a signal line 18-1A for inputting a precharge signal Psig-black at a black level and a precharge signal line 18-2A for inputting a precharge signal Psig-gray at a gray level, sampling switches Pb1A through Pb4A and Pg1A through Pg4A of two routes are connected, to respectives of the signals lines sig1A through sig4A, firstly, the precharge signal Psig-black, successively, the precharge signal Psig-gray at the gray level are written in this order and thereafter, an image signal video is written thereto.

Abstract: First aspect of the present invention: In dot inversion driving, polarities of image signals written to contiguous left and right ones of pixels differ from each other and accordingly, a domain is produced at corners of an opening portion, as a result, an aperture rate of the pixel is lowered and the transmittivity is deteriorated. In the case of an active matrix type TFT liquid crystal display apparatus of a dot successive driving system, gate lines Vg1 through Vg5 are wired to meander between the pixels of two upper and lower lines, Cs lines are wired in a matrix shape, image signals video1 and video2 having polarities inverse to each other are simultaneously written to the pixels of different upper and lower two lines and polarities of the pixels in a pixel arrangement after the writing operation are made the same polarity between contiguous left and right ones of the pixels and inverse polarities between upper and lower ones of the pixels.

Abstract: In a digital-signal-processing circuit comprising an LUT memory used for storing a gamma-correction LUT used for carrying out gamma correction on an input digital video signal and a front-stage signal-processing unit provided at a stage preceding the LUT memory and used for carrying signal processing such as contrast adjustment, after the input digital video signal having a typical width of 8 bits is subjected to signal processing such as contrast adjustment in the signal-processing unit to be transformed into a digital video signal with a width of 11 bits, the 11-bit digital video signal is supplied to the LUT memory having an output bit count of 10 bits, which is smaller than the 11-bit width of the digital video signal supplied to the LUT memory but greater than the 8-bit width of the digital video signal input to the signal-processing unit.

Abstract: An image display system has a main-driver, a sub-driver, a display panel, and a timing generator. The main-driver supplies plural types of video signals having different standards of resolution, while the sub-driver, independent from the main-driver, supplies a black signal whose brightness can be controlled. The display panel includes a vertical scanning circuit for sequentially selecting rows of pixels, a horizontal scanning circuit for distributing the video signals to columns of the pixels so as to be written into the selected pixels, and an auxiliary scanning circuit for distributing the black signal to columns of the pixels so as to be written into the selected pixels. The timing generator controls the respective scanning circuits in the display panel by distributing control signals in accordance with the resolution of the video signals.