In a sampling circuit for a driving circuit for driving an active matrix circuit having signal lines in an active matrix type liquid crystal display device, two switches are connected with each other in series. Further a connection point between two switches is connected with a constant voltage input terminal through another switch or a resistor, to reduce a voltage applied to the TFTs constructing two switches and to perform at high speed operation in the TFTs. When sampling is not performed, t…

In an active matrix type liquid crystal display device, a time gradation display manner for performing time gradation display is used. A digital gradation (voltage) signal on a signal line is supplied to the digital memory circuit arranged in vicinity of each pixel electrode and stored therein for a desired period of time. This storage state is held until next scanning is started. A high voltage or a low voltage supplied as a power source voltage of the digital memory circuit is applied to a pix…

There is provided an electric device which can prevent a deterioration in a frequency characteristic due to a large electric power external switch connected to an opposite electrode and can prevent a decrease in the number of gradations. The electric device includes a plurality of source signal lines, a plurality of gate signal lines, a plurality of power source supply lines, a plurality of power source control lines, and a plurality of pixels. Each of the plurality of pixels includes a switchin…

In order to obtain a light-emitting device having a higher aperture ratio in pixels than that of the prior art, a source signal line and a current supply line to be connected with a pixel unit are switched by a switching circuit to use a common wiring line, so that the number of wiring lines in the pixel unit is reduced to realize the high aperture ratio.

It is one of objects to provide a liquid crystal display device capable of low power consumption, with a driver circuit having a new circuit structure and a pixel. In the liquid crystal display device displaying an image using an n bit digital image signal (n is an integer), by incorporating n.times.m storage circuits (m is an integer) per pixel, it comprises a function of storing an m frame digital image signal in the pixel (in the illustrated figure of an example where n=3, m=2, 3 bits.times.2…

In an active matrix circuit, a series connection of a plurality of transistors as a switching element is provided for each pixel electrode. The transistors are controlled by different gate signal lines.

In an active matrix liquid crystal display device, gate lines in thin-film integrated circuits constituted of thin-film transistors are formed with aluminum. In forming the gate lines, before patterning a starting film of the gate lines, slits are formed in regions where hillock and whiskers, if they should occur, would cause crosstalk or short-circuiting, and portions of the gate lines within the slits are anodized. Wiring lines are formed by utilizing the regions where the slits were formed. A…

A driver circuit for driving an active matrix liquid crystal display without producing flicker. The inversion frequency of the voltage applied to the liquid crystal panel of the display is examined, the frequency being intrinsic to the display. The difference between voltages applied to opposite sides of the liquid crystal panel is found from the transmissivity of the liquid crystal material, by making use of an image sensor. The found value is converted into digital form by an analog-to-digital…

The present invention is characterized by adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external, adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external, and adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external, whereby…

A driver circuit for driving an active matrix liquid crystal display without producing flicker. The inversion frequency of the voltage applied to the liquid crystal panel of the display is examined, the frequency being intrinsic to the display. The difference between voltages applied to opposite sides of the liquid crystal panel is found from the transmissivity of the liquid crystal material, by making use of an image sensor. The found value is converted into digital form by an analog-to-digital…