Abstract: An active matrix display device comprising: scanning branch lines each branching from the scanning line; and switching elements each formed on an end portion of the scanning branch line, wherein the distance between the scanning line side of the switching element and the scanning line is so provided as to enable the scanning branch line to be cut off by irradiation with light energy. Alternatively, an active matrix display device comprising: a conductive layer disposed under the signal line and the pixel electrode with an insulating film interposed therebetween; and a conductive piece formed between the pixel electrode and the insulating film.

Abstract: An active matrix substrate has an insulating substrate, a plurality of signal lines and a plurality of scanning lines arranged in a matrix on the insulating substrate and defining a matrix of areas, each area including a pixel electrode and a switching device. The switching device has a connecting electrode for connecting the switching device to the pixel electrode. The connecting electrode includes a rectangular main portion and an extended portion connected to the main portion, and the main portion has a side which is substantially identical in length to the width of the switching device. The main portion and the extended portion are disposed between the pixel electrode and the insulating substrate.

Abstract: An active matrix display device which includes a pair of insulating substrates, a first group of buses formed on one of the sides of the insulating substrates, a second group of buses crossing the first group of buses, conductive film wirings formed on the second group of buses, wherein the width of each conductive film wiring at stepped portions of the first group of buses is not smaller than that of the conductive film wirings located out of the stepped portions.

Abstract: An active matrix substrate which includes a plurality of pixel electrodes arranged in a matrix over an insulating substrate, with each of the pixel electrodes having a transparent conductive film including an additional capacitance portion and a non-additional capacitance portion. Additional capacitance electrodes are capacitively coupled to said additional capacitance portions through at least one insulating film. A conductive film electrically connects the additional capacitance portion to the non-additional capacitance portion of each of the pixel electrodes. The transparent conductive film of each of said pixel electrodes includes a portion for covering the conductive film, the portion for covering having a wider width than a width of the conductive film.

Abstract: A matrix-type display device includes a display electrode board that has a plurality of pixel electrodes arranged into a matrix. A set of scan lines extend in parallel in one direction and a set signal lines extend in an orthogonal direction so that these lines are arranged between adjacent pixel electrodes. A spare line intersects at least some of the scan lines and/or said signal lines at each end of said set of lines so as to sandwich an insulating film therebetween, and a lead-out line is connected to one end of the spare line. The lead-out lines are connected to external connecting lines, which are outside of the display electrode board, so that the lead-out lines can be connected to each other through said connecting lines. Line breakdowns can be corrected and the correction of the breakdowns entails little or no increase in load capacity, electrical resistance, and noise with respect to the corrected line.

Abstract: An active matrix board comprises pixel electrodes (9) that are disposed in a matrix fashion on an insulating substrate (1), scan lines (23) which are disposed in a parallel manner between the individual pixel electrodes (9), addition capacity lines (31), and signal lines (11) which intersect the scan lines (23) and the addition capacity lines (31). Each scan line (23) comprises a lower scan line (2) which is discontinuously disposed and an anodizable upper scan line (3) that covers the lower scan line (2) and is continuously disposed. Similarly, each addition capacity line (31) comprises a lower line (29) which is discontinuously disposed and an anodizable upper line (30) that covers the lower line (29) and is continuously disposed. Should a segment of a lower line (2, 29) be eroded during etching, the discontinuous disposition of other segments of the lower line (2, 29) precludes the other segments from being subject to erosion.

Abstract: An active matrix display device which includes a pair of insulated substrates, pixel electrodes arranged in matrix on an inner side of one of the pair of insulated substrates, each pixel electrode being provided with at least a pair of TFTs including gate electrodes and drain electrodes, wherein the gate electrodes are formed in symmetrical shapes with respect to a central plane passing through a center between the pair of TFTs, thereby ensuring that the parasitic capacitance of the TFTs remain constant irrespective of a possible displacement of the drain electrodes and keeping the display device free from flickers due to differentiated parasitic capacitances.

Abstract: An active matrix device has pixel electrodes (40), each of which is divided into a plurality of divisional pixel electrodes (41, 42). Each divisional pixel electrode (41, 42) has a corresponding switching element (31, 32). A junction bridges adjacent ones of the divisional pixel electrodes (41, 42), and at least one spare switching element (34) is disposed in proximity to the junction. The junction has a pair of metal pieces (44, 45) electrically connected to the respective pixel electrodes (41, 42), an output terminal (74) of the spare switching element (34), and a joint metal layer (46) on which both of the metal pieces (44, 45) and the output terminal (74) of the spare switching element (34) are superposed with an insulating film (54) placed therebetween.

Abstract: An active matrix substrate comprising picture element electrodes disposed in a matrix on a substrate, each of which is composed of divided electrodes, and an electrically conductive film on which two of said divided electrodes adjacent to each other are superposed in a manner to sandwich an insulating film therebetween so as to form a connection. The connection is irradiated with laser beams from the outside of the display apparatus when one of the divided electrodes brings about a picture element defect, so that both the divided electrodes can be electrically connected to each other, thereby attaining a correction of the picture element defect. A display apparatus using the active matrix substrate is also provided.

Abstract: A method for manufacturing an active matrix display apparatus comprising: forming picture element electrodes disposed in a matrix at the inner surface of either one of a pair of substrates, switching elements electrically connected to the picture element electrodes respectively, spare switching elements disposed close to the picture element electrodes in a non-conductive state respectively, and connections, each including an extension end of each of the spare switching elements and a metal piece electrically connected to one end of each of the picture element electrodes, the extension end and metal piece being disposed opposite to each other in a non-conductive state; applying a drive signal to a display medium via the picture element electrodes and opposite electrodes thereby detecting a defect in the switching element; and irradiating energy onto the connection between the picture element electrode connected to the switching element, the defect of which has been detected, and the spare switching element, th

Abstract: An active matrix display apparatus comprising a pair of substrates, at least one of which is translucent, a display medium charged between the substrates and modulated of its optical characteristics in response to applied voltage, picture element electrodes disposed in a matrix at the inner surface of either one of the pair of substrates, switching elements electrically connected to the picture element electrodes respectively, and spare switching elements disposed close to the picture element electrodes in a non-conductive state respectively, the extension end of the spare switching element and one end of the picture element electrode are disposed on a metal piece so as to sandwich an insulating layer therebetween, whereby a picture element defect caused by a malfunction of switching elements can be readily corrected.

Abstract: A matrix display apparatus with a layered structure in which driving wires are layered on repair wires to sandwhich an insulating film therebetween, whereby it is possible to carry out complete driving of the display apparatus so that the location of picture element defects can be identified.