Abstract: A display device includes a display area and the terminal area. Formed in the terminal area are FOG terminals connected to external wires and COG input terminals and COG output terminals connected to a semiconductor chip, the FOG terminals being connected to the COG input terminals, the COG output terminals being connected to lead wires extending from wires in the display area. The FOG terminals and the COG input terminals are structured so that a first ITO film is formed on a first terminal metal, the first ITO film having an insulating film formed thereon, the insulating film having first through holes formed therein to expose the first ITO film. The COG output terminals are structured so that the insulating film is formed on a second terminal metal, the insulating film having second through holes formed therein to expose the second terminal metal covered by a second ITO film.

Abstract: An organic EL display device includes scanning lines, video signal lines, and pixels, each including a TFT having a semiconductor layer and an organic EL layer located between a lower electrode and an upper electrode. A source electrode connecting the semiconductor layer and the lower electrode is formed of three layers including a barrier metal, an Al-containing metal, and a cap metal. The barrier metal is formed of a first layer in contact with the semiconductor layer and a second layer in contact with the Al-containing metal. Each of the first layer, the second layer, and the cap metal is formed of a metal comprising a high melting point metal, and an amount of oxygen in the first layer is larger than an amount of oxygen in the second layer.

Abstract: An organic EL display device includes scanning lines, video signal lines, and pixels, each including a TFT having a semiconductor layer and an organic EL layer located between a lower electrode and an upper electrode. A source electrode connecting the semiconductor layer and the lower electrode is formed of three layers including a barrier metal, an Al-containing metal, and a cap metal. The barrier metal is formed of a first layer in contact with the semiconductor layer and a second layer in contact with the Al-containing metal. Each of the first layer, the second layer, and the cap metal is formed of a metal comprising a high melting point metal, and an amount of oxygen in the first layer is larger than an amount of oxygen in the second layer.

Abstract: A contact resistance in a through-hole with a source or a drain electrode connected to a TFT is decreased, thereby improving the operation efficiency of a display device. In the through-hole, a source portion of the TFT is connected to a source electrode 8. The source electrode 8 is formed of three layers comprising a barrier metal, an Al alloy 82, and a cap metal 83. The barrier metal is divided into a lower layer 81a in contact with the semiconductor layer and an upper layer 81b in contact with the Al alloy. The lower layer 81a of the barrier metal is formed by sputtering, the lower layer 81a is heat-treated and, subsequently, an upper layer 81b of the base metal, the Al alloy 82, and the cap metal 83 are formed continuously by sputtering. Since the upper layer 81b of the barrier metal in contact with the Al alloy 82 is not oxidized, increase in the contact resistance in the through-hole can be prevented.

Abstract: Provided is a technology for preventing current leak of a charge holding capacitor which constitutes a pixel of a display device so as to prevent deterioration of display image quality of the display device. The display device includes a first contact hole connecting a first wiring layer and a second wiring layer which is formed over the first wiring layer, a second contact hole connecting the second wiring layer and a third wiring layer which is formed over the second wiring layer, and an electrode layer formed between the plurality of insulating films disposed between the second wiring layer and the third wiring layer, wherein at a position in a substrate surface direction, a distance between a electrode layer and the second contact hole is larger than a distance between the electrode layer and the first contact hole.

Abstract: The present invention prevents electrostatic breakdown attributed to static electricity even in and after a cell cutting step. In a display device which includes a substrate, a plurality of pixels which is formed in a pixel part, a plurality of video lines which applies video voltages to the plurality of pixels, and a video voltage selection circuit which selects the video voltages to be inputted to the pixels and applies the selected video voltages to the predetermined video lines among the plurality of video lines, an electrostatic protective circuit for protecting a pixel part is connected to the plurality of video voltage inputting lines which inputs the video voltages to the video voltage selection circuit, and an electrostatic protective circuit for protecting a peripheral circuit is connected to the lines other than the video voltage inputting lines which is connected to the video voltage selection circuit.

Abstract: The TFT substrate includes a conductive region electrically conducted to the transparent conductive film and a terminal region, on a first side not covered with the counter substrate. The terminal region includes a ground terminal connected to the conductive region and an adjacent terminal which is adjacent to the ground terminal and supplies signals or power source to the peripheral circuit. The adjacent terminal is connected to the peripheral circuit through a first wiring installed along a third side of the TFT substrate toward a second side facing the first side. The first wiring is extended to a middle point of the third side and then connected to the peripheral circuit.

Abstract: A contact resistance in a through-hole with a source or a drain electrode connected to a TFT is decreased, thereby improving the operation efficiency of a display device. In the through-hole, a source portion of the TFT is connected to a source electrode 8. The source electrode 8 is formed of three layers comprising a barrier metal, an Al alloy 82, and a cap metal 83. The barrier metal is divided into a lower layer 81a in contact with the semiconductor layer and an upper layer 81b in contact with the Al alloy. The lower layer 81a of the barrier metal is formed by sputtering, the lower layer 81a is heat-treated and, subsequently, an upper layer 81b of the base metal, the Al alloy 82, and the cap metal 83 are formed continuously by sputtering. Since the upper layer 81b of the barrier metal in contact with the Al alloy 82 is not oxidized, increase in the contact resistance in the through-hole can be prevented.

Abstract: Provided is a technology for preventing current leak of a charge holding capacitor which constitutes a pixel of a display device so as to prevent deterioration of display image quality of the display device. The display device includes a first contact hole connecting a first wiring layer and a second wiring layer which is formed over the first wiring layer, a second contact hole connecting the second wiring layer and a third wiring layer which is formed over the second wiring layer, and an electrode layer formed between the plurality of insulating films disposed between the second wiring layer and the third wiring layer, wherein at a position in a substrate surface direction, a distance between a electrode layer and the second contact hole is larger than a distance between the electrode layer and the first contact hole.

Abstract: A first conductive layer in which a first electrode film is formed, a first protective layer on the first conductive layer, a first hole penetrating through the first protective layer to reach the first electrode film, a second conductive layer including a second electrode film which is disposed on the first protective layer and in contact with a portion of the first electrode film at the bottom of the first hole and the lower electrode, a second protective layer disposed on the second conductive layer and including the insulating film, a second hole disposed on the second protective layer and penetrating through the second protective layer to reach the second electrode film, and a third conductive layer including a third electrode film which is in contact with a portion of the second electrode film at the bottom of the second hole and the upper electrode.

Abstract: A display device includes sub-pixels, video lines, a drive circuit and switch groups. The video lines are divided into plural blocks each composed of m video lines, m being an integer of 2 or more. The drive circuit outputs m gray scale voltages time-sequentially. Each of the switch groups corresponding to one of the blocks is composed of first to mth switches, receives the m gray scale voltages from the drive circuit, and then supplies them to the m video lines in a time-division multiplexed fashion. The mth switch is turned on last during a writing time for writing the m gray scale voltages into the sub-pixels, and Tq<Tm, where Tm and Tq are times during which the mth switch and a qth switch of the first to (m?1)th switches are turned on, respectively, and q is an integer of from 1 to (m?1).

Abstract: A display device having gate signal lines, a scanning signal driving circuit which supplies scanning signals to respective gate signal lines, drain signal lines, and a video signal driving circuit which supplies video signals to respective drain signal lines formed on one surface of an insulating substrate. The display device includes a first thin film transistor which is driven by the scanning signals, a pixel electrode to which the video signals are supplied through the first thin film transistor in each pixel region. The video signal driving circuit includes a dynamic memory which is comprised of a plurality of other thin film transistors formed in parallel with the first thin film transistor, and at least one thin film transistor among the plurality of other thin film transistors is covered with a conductive film having a potential which is fixed through an insulation film.

Abstract: A first conductive layer in which a first electrode film is formed, a first protective layer on the first conductive layer, a first hole penetrating through the first protective layer to reach the first electrode film, a second conductive layer including a second electrode film which is disposed on the first protective layer and in contact with a portion of the first electrode film at the bottom of the first hole and the lower electrode, a second protective layer disposed on the second conductive layer and including the insulating film, a second hole disposed on the second protective layer and penetrating through the second protective layer to reach the second electrode film, and a third conductive layer including a third electrode film which is in contact with a portion of the second electrode film at the bottom of the second hole and the upper electrode.

Abstract: The TFT substrate includes a conductive region electrically conducted to the transparent conductive film and a terminal region, on a first side not covered with the counter substrate. The terminal region includes a ground terminal connected to the conductive region and an adjacent terminal which is adjacent to the ground terminal and supplies signals or power source to the peripheral circuit. The adjacent terminal is connected to the peripheral circuit through a first wiring installed along a third side of the TFT substrate toward a second side facing the first side. The first wiring is extended to a middle point of the third side and then connected to the peripheral circuit.

Abstract: At least one substrate includes plural pad electrodes at an end of at least one side, each of the plural pad electrodes includes a metal layer formed on the at least one substrate and a transparent conductive film formed on the metal layer, and a flexible wiring board includes a connection electrode mechanically and electrically connected to the transparent conductive film of each of the pad electrodes. Each of the pad electrodes has, on a surface on which the metal layer is formed, a metal-layer removed area in which the metal layer is not formed in a shape of a recess or an opening, the transparent conductive film covers both an area in which the metal layer is formed and the metal-layer removed area and is electrically connected to the metal layer in the area in which the metal layer is formed, and the connection electrode of the flexible wiring board is superimposed on both the metal layer and the metal-layer removed area of the pad electrode.

Abstract: The present invention provides a liquid crystal display device which mounts a back-surface conductive film on one substrate, wherein a reference potential is surely supplied to the back-surface conductive film. The liquid crystal display device includes a first substrate, a second substrate, and liquid crystal sandwiched between the first substrate and the second substrate, wherein the second substrate includes a back-surface conductive film on a surface thereof opposite to the liquid crystal, and the first substrate includes a pad electrode which is formed on the first substrate and is electrically connected with the back-surface conductive film via a conductive member, a conductive film which is formed on the first substrate and below the pad electrode, a first connection line which connects the conductive film and a reference voltage terminal, and at least one contact hole which connects the pad electrode and the conductive film.

Abstract: The present invention prevents electrostatic breakdown attributed to static electricity even in and after a cell cutting step. In a display device which includes a substrate, a plurality of pixels which is formed in a pixel part, a plurality of video lines which applies video voltages to the plurality of pixels, and a video voltage selection circuit which selects the video voltages to be inputted to the pixels and applies the selected video voltages to the predetermined video lines among the plurality of video lines, an electrostatic protective circuit for protecting a pixel part is connected to the plurality of video voltage inputting lines which inputs the video voltages to the video voltage selection circuit, and an electrostatic protective circuit for protecting a peripheral circuit is connected to the lines other than the video voltage inputting lines which is connected to the video voltage selection circuit.

Abstract: To take aim at low power consumption when controlling display/non-display in an arbitrary area.

Abstract: A display device, which exhibits improved image qualities has a pair of substrates which sandwich a liquid crystal layer therebetween. On one of the substrates there are a plurality of video signal lines, a plurality of pixel electrodes, which are arranged in a matrix array and to which video signals are supplied from the video signal lines, and a plurality of conductive layers, which are provided at positions where portions thereof overlap with the video signal lines by way of an insulation film. The respective conductive layers are electrically connected to respective video signal lines. Further, the conductive layer is able to prevent light irradiated from a backlight from leaking through a gap defined between two neighboring pixel electrodes.

Abstract: A display device having gate signal lines, a scanning signal driving circuit which supplies scanning signals to respective gate signal lines, drain signal lines, and a video signal driving circuit which supplies video signals to respective drain signal lines formed on one surface of an insulating substrate. The display device includes a first thin film transistor which is driven by the scanning signals, a pixel electrode to which the video signals are supplied through the first thin film transistor in each pixel region. The video signal driving circuit includes a dynamic memory which is comprised of a plurality of other thin film transistors formed in parallel with the first thin film transistor, and at least one thin film transistor among the plurality of other thin film transistors is covered with a conductive film having a potential which is fixed through an insulation film.