Patent application number | Description | Published |
20080303762 | Display device - A display device which arranges a memory part for every display pixel is configured to prevent a charge from remaining in liquid crystal when a power source is turned off. Each display pixel includes a memory part for storing video data, a pixel electrode, and a switch part for selectively applying a first video voltage or a second video voltage different from the first video voltage to the pixel electrode corresponding to the video data stored in the memory part. The display device further includes a reset circuit for allowing the first video voltage and the second video voltage to have the same voltage when a power source of the display device is turned off. | 12-11-2008 |
20090045406 | SEMICONDUCTOR DEVICE AND DISPLAY DEVICE - A semiconductor device which can realize a diode function is provided with a manufacturing process of a polysilicon thin film transistor and without adding a dedicated process. A semiconductor device is provided having a semiconductor layer comprising a low-concentration p-type polysilicon region formed over a substrate, the semiconductor device comprising a high-concentration p-type polysilicon region and a high-concentration n-type polysilicon region which are formed over the substrate on both sides of the low-concentration p-type polysilicon region, an insulating film which is formed over the high-concentration p-type polysilicon region, the low-concentration p-type polysilicon region, and the high-concentration n-type polysilicon region, and a control electrode which is formed over the insulating film and over the low-concentration p-type polysilicon region, wherein the control electrode is electrically connected to one of the high-concentration p-type polysilicon region and the high-concentration n-type polysilicon region. | 02-19-2009 |
20090045408 | Display device - A display device includes a display panel which forms a plurality of sub pixels on a substrate thereof, and a drive circuit which is configured to drive the plurality of sub pixels, wherein the drive circuit has a thin film transistor formed on the substrate, and the thin film transistor has a semiconductor layer made of poly-silicon. The thin film transistor includes: a source electrode, a semiconductor layer and a drain electrode which are formed on the substrate; a gate insulation film which is formed on the source electrode, the semiconductor layer and the drain electrode; a gate electrode which is formed on the gate insulation film and above the semiconductor layer; an insulation film which is formed on the gate electrode; and a metal layer which is formed on the insulation film in a state that the metal layer covers at least a portion of the gate electrode. | 02-19-2009 |
20090073149 | Display device - The gate electrode is formed above the polycrystalline semiconductor layer through the gate insulating film. The polycrystalline semiconductor layer includes a first region overlapping with the gate electrode in plan view. The first region is sandwiched between the second region and the third region. The second region of the polycrystalline semiconductor layer includes a first impurity diffusion region and two second impurity diffusion regions opposite in conductivity type to the first impurity diffusion region. The first region and the first impurity diffusion region are in contact with each other at a first boundary. The first region and the two second impurity diffusion regions are in contact with each other at second boundaries. The two second impurity diffusion regions sandwiching the first impurity diffusion region are provided along the gate electrode. Thus, a leak current is suppressed. | 03-19-2009 |
20090103037 | Display Device - 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. | 04-23-2009 |
20090213057 | DISPLAY DEVICE - Provided is a display device including a level shift circuit, which includes a thin film transistor having a polycrystalline semiconductor layer, and which realizes a reliable operation even when a threshold of the thin film transistor varies. The display device includes: a board; and the level shift circuit which includes the thin film transistor having the polycrystalline semiconductor layer, and is formed on the board, in which the level shift circuit includes: a plurality of source-input level shift circuits including a plurality of unit level shift circuits having drain resistors different in value from one another; and a selection circuit, which selects one of outputs from the plurality of unit level shift circuits as an output from a normally operated unit level shift circuit. | 08-27-2009 |
20090213060 | DISPLAY DEVICE - A display device includes, in each pixel including a pixel electrode and a counter electrode with liquid crystal therebetween, a memory part which stores video data written to the pixel electrode and a switch part which applies a first video voltage to the counter electrode and selects and applies the first video voltage or a second video voltage which is obtained by inverting the first video voltage to the pixel electrode in accordance with the video data stored in the memory part, in which a liquid crystal inversion AC cycle during which the first video voltage and the second video voltage are driven such that a magnitude of the first video voltage and a magnitude of the second video voltage are exchanged in a predetermined cycle is set longer than a rewrite cycle of video data to the pixel electrode. | 08-27-2009 |
20090256792 | Display Device - An object of the present invention is to increase the reliability in the level shift operation in a display device provided with a level shift circuit. The display device according to the present invention is characterized in that the above described level shift circuit comprises: a first thin film transistor having a semiconductor layer formed of a polysilicon layer; a waveform rectifying circuit connected to a second electrode of the above described first thin film transistor; and a constant current source and a switching element connected between the second electrode of the above described first thin film transistor and a reference power source, wherein a bias voltage is inputted into a control electrode of the above described first thin film transistor and an input signal is inputted into a first electrode of the above described first thin film transistor. | 10-15-2009 |
20100097364 | DISPLAY DEVICE - An object of the present invention is to increase the speed of the level shifting operation in a display device having a level shift circuit formed of polysilicon thin film transistors. The present invention provides a display device having a level shift circuit wherein the above described level shift circuit has: a thin film transistor having a semiconductor layer formed of a polysilicon layer; a load resistance element connected between a second electrode of the above described thin film transistor and a reference power supply; and a waveform rectifying circuit connected to the second electrode of the above described thin film transistor, and a diode element of which the anode region is connected to the first electrode of the above described thin film transistor and of which the cathode region is connected to the second electrode of the above described thin film transistor. | 04-22-2010 |
20100149156 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device which can reduce a scale of the whole counter-electrode-signal drive circuits is provided. The liquid crystal display device includes: a substrate; a plurality of counter electrodes which are formed on the substrate corresponding to pixels; a plurality of counter electrode signal lines which are formed on the substrate, are electrically made conductive with the counter electrodes, extend in the X direction, and are arranged parallel to each other in the Y direction which intersects the X direction; and counter electrode signal drive circuits having control signal outputting parts which are mounted on the substrate at a rate of one control signal outputting part for two counter electrode signal lines. | 06-17-2010 |
20100230675 | DISPLAY DEVICE - A display device having a photosensor which exhibits excellent photoelectric conversion efficiency is provided. In a display device which forms photosensors on a substrate thereof, the photosensor is formed by sequentially stacking a gate electrode, a gate insulation film and a semiconductor layer in such an order or in an opposite order from a substrate side, and electrodes are connected to both sides of the semiconductor layer respectively, the semiconductor layer is formed of a stacked body consisting of a crystalline semiconductor layer and an amorphous semiconductor layer, and the crystalline semiconductor layer is arranged on the gate insulation film side. | 09-16-2010 |
20100231561 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes: a liquid crystal display panel having a pair of substrates which is arranged to face each other in an opposed manner with liquid crystal sandwiched therebetween; and a backlight arranged on a one-side surface of the liquid crystal display panel. Thin film transistors are formed on a liquid-crystal-side surface of the substrate on a backlight side. In such a liquid crystal display device, the thin film transistor is constituted of a gate electrode, a gate insulation film which is formed so as to cover the gate electrode, a semiconductor layer which is formed on an upper surface of the gate insulation film, and a pair of electrodes which is arranged to face each other in an opposed manner on an upper surface of the semiconductor layer from the substrate side as viewed in a plan view. The semiconductor layer is formed of a stacked body consisting of a microcrystalline semiconductor layer and an amorphous semiconductor layer from the substrate side, and the semiconductor layer is formed in an island shape within a region where the gate electrode is formed as viewed in a plan view. Each one of the pair of electrodes is formed such that, as viewed in a plan view, sides of the each one electrode excluding a side of the each one electrode which faces the other electrode project outwardly from the semiconductor layer, and a portion of the each one electrode which projects outwardly from the semiconductor layer overlaps with the gate electrode at least on the periphery of the semiconductor layer. | 09-16-2010 |
20120287494 | DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE DISPLAY DEVICE - A metal layer is formed on a highly light-transmissive substrate; a resist mask having an opening pattern is formed on the metal layer; exposed portions of the metal layer is etched away in this state to form openings; then the resist mask is removed; and a surface of the metal layer and an inner side wall of each of the openings are oxidized to form a metal oxide layer. Thus, a front surface and a rear surface of the aperture plate are caused to have different reflectances. The oxide layer is formed at the same time as when the resist mask is ashed to remove resist. | 11-15-2012 |
20120293851 | DISPLAY DEVICE - Provided is a display device, including: a pair of substrates arranged at an interval; oil filled between the pair of substrates; a shutter arranged in the oil; a drive portion, which is arranged in the oil, for driving the shutter in a predetermined direction; and a wall portion provided in the oil and on one of the pair of substrates. The wall portion is positioned adjacent to the shutter in one of the predetermined direction of the shutter and a direction orthogonal to the predetermined direction. The wall portion has a height exceeding a height of the shutter in a thickness direction of the shutter. The wall portion has at least a part positioned lateral to the shutter. | 11-22-2012 |
20120306562 | MEMS DISPLAY PIXEL CONTROL CIRCUITS AND METHODS - This disclosure provides novel latching circuits, and pixel circuits and display devices that include such latching circuits. The latches herein include a switch positioned on an inverter coupling interconnect which couples two cross-coupled inverters of the latch. The switch is configured to control a passage of a current between the first and second inverters. By switching the switch OFF at a time a data voltage is transferred to the inverters, any leak current between the inverters can be interrupted. As a result, a malfunctioning of the data latch is prevented. | 12-06-2012 |
20120307334 | DISPLAY DEVICE AND METHOD OF MANUFACTURING THE DISPLAY DEVICE - In a movable shutter-system display device, a movable shutter includes an amorphous silicon film material which has a low residual stress and thus is stable. A display device includes a display panel comprising a first substrate and a second substrate. The display panel includes a plurality of pixels; each of the plurality of pixels includes a movable shutter including amorphous silicon and a driving circuit for driving the movable shutter; and the amorphous silicon included in the movable shutter is formed of at least two amorphous silicon films, and where any two amorphous silicon films adjacent to each other among the at least two amorphous silicon films are a first amorphous silicon film and a second amorphous silicon film stacked on the first amorphous silicon film, the first amorphous silicon film and the second amorphous silicon film have different characteristic values. | 12-06-2012 |
20130016419 | DISPLAY DEVICEAANM MORITA; TakeomiAACI MobaraAACO JPAAGP MORITA; Takeomi Mobara JPAANM Okamoto; MasatakaAACI ChonanAACO JPAAGP Okamoto; Masataka Chonan JPAANM Muneyoshi; TakahikoAACI ChibaAACO JPAAGP Muneyoshi; Takahiko Chiba JPAANM Nishizawa; ShigekiAACI MobaraAACO JPAAGP Nishizawa; Shigeki Mobara JPAANM Matsumoto; KatsumiAACI MobaraAACO JPAAGP Matsumoto; Katsumi Mobara JP - A display device includes a first substrate; a second substrate; a plurality of pixels; a shutter mechanism section formed in correspondence with each of the pixels, a fluid sealed in an space between the first substrate and the second substrate; and an impact absorption section located to face one substrate among the first substrate and the second substrate, on the side opposite to the side on which the fluid is located. The shutter mechanism section is formed on the second substrate and includes a movable shutter section for controlling a light transmittance of each of the pixels. The impact absorption section includes a third substrate located to face the one substrate, on the side opposite to the fluid, a sealing section for bringing together the one substrate and the third substrate, and a predetermined gap formed among the one substrate, the third substrate and the sealing section. | 01-17-2013 |
20130021781 | DISPLAY DEVICE WITH TAPERED LIGHT REFLECTING LAYER AND MANUFACTURING METHOD FOR SAME - A display device includes a substrate having an upper surface. The display device also includes a light reflecting layer to reflect light, formed over the upper surface of the substrate. The display device also includes a light absorbing layer to absorb light, formed over the upper surface of the light reflecting layer. A plurality of apertures are defined through the light reflecting layer and the light absorbing layer such that, at an edge of each of the plurality of apertures, the light absorbing layer partially overhangs the light reflecting layer. | 01-24-2013 |
20130100091 | DISPLAY DEVICE - An edge of the dummy opening includes an edge formed of a part of an edge of the stationary opening assumed to be arranged in the peripheral area with regularity of the stationary openings. The shutter in the display area makes the driven opening and the stationary opening be communicated with each other to transmit light at the first position, and is disposed so that the driven opening and the stationary opening are shifted from each other to block the light at the second position. In the case in which the shutters are located in the second position, the distance between the driven opening and the edge in the peripheral area and the distance between the driven opening and a part of an edge of the stationary opening in the display area have a correlative relationship with each other. | 04-25-2013 |
20140049722 | DISPLAY DEVICE - A display device includes a first substrate; a second substrate; a plurality of pixels; a shutter mechanism section formed in correspondence with each of the pixels, a fluid sealed in an space between the first substrate and the second substrate; and an impact absorption section located to face one substrate among the first substrate and the second substrate, on the side opposite to the side on which the fluid is located. The shutter mechanism section is formed on the second substrate and includes a movable shutter section for controlling a light transmittance of each of the pixels. The impact absorption section includes a third substrate located to face the one substrate, on the side opposite to the fluid, a sealing section for bringing together the one substrate and the third substrate, and a predetermined gap formed among the one substrate, the third substrate and the sealing section. | 02-20-2014 |