Abstract: A liquid crystal display device, or more particularly, an active matrix type liquid crystal display device having a pixel electrode formed in a pixel field defined on one of two transparent substrates opposed to each other with a liquid crystal layer between them. The pixel electrode is overlapped a signal line, which is formed in a portion of the one transparent substrate coincident with a black matrix, with a dielectric between them. The width of the overlap is set to a value satisfying a condition that an electric field induced between the signal line and pixel electrode will not invade into the pixel field defined with the black matrix. Owing to the structure, inhomogeneous luminance caused by a source electrode of a thin film transistor can be avoided. Moreover, inhomogeneous luminance caused by a capacitive element can be avoided.

Abstract: A liquid crystal display device can readily achieve uniformization of the threshold voltages of individual thin film transistors in spite of its simple construction. The liquid crystal display device includes gate signal lines juxtaposed in one direction, drain signal lines juxtaposed to intersect with the gate signal lines, thin film transistors which are respectively formed in areas each surrounded by the gate signal lines and the drain signal lines and are driven by supply of scanning signals from the gate signal lines, pixel electrodes to which video signals from the drain signal lines are to be supplied via the respective thin film transistors, a first terminal for applying voltages to the respective gate signal lines via diodes, and a second terminal for applying voltages to the respective drain signal lines via diodes.

Abstract: A liquid crystal display device in which counter-measures are taken for static electricity from the step of forming wiring lines of a substrate on the side where thin film transistors or switching elements are formed to the step of completing module mounting is suited for improving the productivity and for lowering the production cost of the display device. For this purpose, the liquid crystal display device is characterized in that resistor elements for connecting gate lines or drain lines are disposed inside a seal and are arranged in one or more lines outside an effective pixel region, or additional gate lines and additional pixels are arranged in a plurality of lines outside the first gate line or the last gate line in the effective pixel region, and the additional gate lines are short-circuited with each other at their end portions.

Abstract: The i-type semiconductor layer (AS) and the gate insulating film (GI) are patterned along and in the same shape as the video signal lines (DL) between the video signal lines (DL) and the first transparent glass substrate (SUB1 ). The backlight is disposed on the second transparent glass substrate (SUB2) side. Therefore, signal line reflection of external light can be prevented, improving the display quality.

Abstract: A liquid crystal display device is provided which reduces the resistance of input wires disposed between a flexible board and driving ICs mounted in a flip-chip style, and enhances resistance against electrocorrosion of input terminals thereof. The liquid crystal display device includes two transparent insulating substrates (SUB1, SUB2) confronting each other through a liquid crystal layer, plural liquid crystal driving circuits (ICs) mounted in a flip-chip style on a surface of one of the substrates located at the side of the liquid crystal layer, a flexible board (FPC) for inputting a signal to each of the liquid crystal driving circuits, and plural input wires (Td) provided on the surface of the one substrate at the side of the liquid crystal layer to connect output terminals of the flexible board to input terminals of the liquid crystal driving circuits.

Abstract: The i-type semiconductor layer (AS) and the gate insulating film (GI) are patterned along and in the same shape as the video signal lines (DL) between the video signal lines (DL) and the first transparent glass substrate (SUB1). The backlight is disposed on the second transparent glass substrate (SUB2) side. Therefore, signal line reflection of external light can be prevented, improving the display quality.

Abstract: The gate terminal GTM is formed of the aluminum film g and the transparent conductive film dl, which is deposited on the aluminum film g. The gate terminal GTM is formed at its side with a connection portion where the transparent conductive film dl is not provided but where a connection film CNF made of second and third conductive films d2, d3 is provided to connect the aluminum film g and the transparent conductive film dl. At the side of the gate terminal GTM where the connection film CNF is provided, a terminal side portion protective film TSP1 at the same level as the passivation film PSV1 is formed. At the other side of the gate terminal GTM, a terminal side portion protective film TSP2 is provided, which consists of a film at the same level as the insulation film GI and a film at the same level as the passivation film PSV1.