1605results about How to "Increase the aperture ratio" patented technology

One embodiment of the present invention is a color EL display characterized in that at least color filters, a thin film transistor circuit, an organic EL layer, and a common electrode are laminated in this order on a transparent substrate. Another embodiment of the invention is a method for producing a color EL display comprising the steps of forming color filters or a transparent substrate; forming a thin film transistor circuit; forming an organic EL layer; and forming a common electrode, wherein process temperatures of the steps of forming the thin film transistor circuit and subsequent steps are 200° C. or less.

An object is to provide a semiconductor device of which a manufacturing process is not complicated and by which cost can be suppressed, by forming a thin film transistor using an oxide semiconductor film typified by zinc oxide, and a manufacturing method thereof. For the semiconductor device, a gate electrode is formed over a substrate; a gate insulating film is formed covering the gate electrode; an oxide semiconductor film is formed over the gate insulating film; and a first conductive film and a second conductive film are formed over the oxide semiconductor film. The oxide semiconductor film has at least a crystallized region in a channel region.

Powder desiccant is mixed into a seal which adheres a first substrate to a second substrate, thereby sealing a display region. Almost no moisture permeates through the outer surfaces of the substrates sandwiching the display region, while moisture permeating through the seal is adsorbed by the desiccant. An emissive layer is thereby prevented from deterioration due to moisture. By covering the display region with a resin sealing layer composed of resin having desiccant mixed therein, the display region can reliably be protected from moisture. By forming a groove in the substrate and placing a desiccant therein, moisture can be further reliably adsorbed.

A liquid crystal display of the invention includes a plurality of pixels each of which has a liquid crystal layer and a plurality of electrodes for applying a voltage to the liquid crystal layer and which are arranged in a matrix of rows and columns, wherein: each of the plurality of pixels has a first sub-pixel and a second sub-pixel which can apply mutually different voltages to the liquid crystal layer, where the first sub-pixel has a higher brightness than the second sub-pixel in certain gradations; the first sub-pixel and the second sub-pixel each has: a liquid crystal capacitor formed by a counter electrode and a sub-pixel electrode opposing the counter electrode via the liquid crystal layer, and a storage capacitor formed by a storage capacitor electrode connected electrically to the sub-pixel electrode, an insulating layer, and a storage capacitor counter electrode opposing the storage capacitor electrode via the insulating layer; the counter electrode is a single electrode shared by the first sub-pixel and the second sub-pixel, and the storage capacitor counter electrodes of the first sub-pixel and the second sub-pixel are electrically independent of each other; and the storage capacitor counter electrode of the first sub-pixel in any of the plurality of pixels and the storage capacitor counter electrode of the second sub-pixel of a pixel adjacent to any of the pixels in the column direction are electrically independent of each other.

By applying an AC pulse to a gate of a transistor which easily deteriorates, a shift in threshold voltage of the transistor is suppressed. However, in a case where amorphous silicon is used for a semiconductor layer of a transistor, the occurrence of a shift in threshold voltage naturally becomes a problem for a transistor which constitutes a part of circuit that generates an AC pulse. A shift in threshold voltage of a transistor which easily deteriorates and a shift in threshold voltage of a turned-on transistor are suppressed by signal input to a gate electrode of the transistor which easily deteriorates through the turned-on transistor. In other words, a structure for applying an AC pulse to a gate electrode of a transistor which easily deteriorates through a transistor to a gate electrode of which a high potential (VDD) is applied, is included.

A capacitor structure includes a first conductive layer, a first insulating layer disposed on a substrate in sequence, a second conductive layer disposed on portions of the first insulating layer, a second insulating layer disposed on the second conductive layer and the first insulating layer, a third conductive layer disposed on portions of the second insulating layer, a third insulating layer disposed on the third conductive layer and the second insulating layer, and a fourth conductive layer disposed on the third insulating layer. The third conductive layer and the fourth conductive layer are electrically connected to the first conductive layer and the second conductive layer through at least one first contact hole adjacent to the second conductive layer and at least one second contact hole, respectively.

A discharge transistor (TFT3) which connects the upper end of an organic EL element (EL) and a negative power source (VEE) and a control transistor (TFT4) which connects the upper end of a storage capacitor (SC) with a power source (PVDD) are provided. These transistors (TFT3, TFT4) are turned on by the upper gate line, so that the capacitor of the organic EL element (EL) is discharged prior to the selection of the line for these transistors.

An electroluminescent (EL) device including an illumination area having one or more primary EL emitters; a reference area having a reference EL emitter; a reference driver circuit for causing the reference EL emitter to emit light while the EL device is active; a sensor for detecting light emitted by the reference EL emitter; and a measurement unit for detecting an aging-related electrical parameter of the reference EL emitter while it is emitting light. The device further includes a controller for receiving an input signal for each primary EL emitter in the illumination area, forming a corrected input signal from each input signal using the detected light and the aging-related electrical parameter, and applying the corrected input signals to the respective primary EL emitters in the illumination area.

In a pixel circuit 10, TFTs 12 and 13 are turned on while a TFT 14 is turned off, and a voltage (VDD+Vx) which depends on a threshold voltage Vth of a driving TFT 11 is read onto a data line Sj. Moreover, switches 21 and 22 in a source driver circuit are turned on, and a voltage Vx is held at a capacitor 26. Next, the TFT 13 is turned off, states of switches 21 to 24 are switched, and a voltage (Vdata+Vx) is applied to the data line Sj. Further, the TFT 12 is turned off while the TFT 14 is turned on. An amount of an electric current flowing through an organic EL element 15 after the turn-on of the TFT 14 is determined from the voltage (Vdata+Vx) of a gate terminal of the driving TFT 11. Thus, it is possible to efficiently utilize an amplitude of a data voltage and compensate variations in threshold voltage of the driving TFT 11 with high accuracy, without increasing a scale of the pixel circuit 10.

An electroluminescent (EL) subpixel, such as an organic light-emitting diode (OLED) subpixel, is compensated for aging effects such as threshold voltage V_th shift, EL voltage V_oled shift, and OLED efficiency loss. The drive current of the subpixel is measured at one or more measurement reference gate voltages to form a status signal representing the characteristics of the drive transistor and EL emitter of the subpixel. Current measurements are taken in the linear region of drive transistor operation to improve signal-to-noise ratio in systems such as modern LTPS PMOS OLED displays, which have relatively small V_oled shift over their lifetimes and thus relatively small current change due to channel-length modulation. Various sources of noise are also suppressed to further increase signal-to-noise ratio.

A deposition mask and a display unit and method of manufacturing same are provided. A red continuous organic layer, a green continuous organic layer, and a blue continuous organic layer are provided over two or more lines of a matrix configuration of organic light emitting devices in common. A film thickness distribution in the extensional direction of the red, green and blue continuous organic layer is dissolved, and an aperture ratio can be improved by just that much.

A pixel arrangement structure of an OLED display is provided. The pixel arrangement structure includes: a first pixel having a center coinciding with a center of a virtual square; a second pixel separated from the first pixel and having a center at a first vertex of the virtual square; and a third pixel separated from the first pixel and the second pixel, and having a center at a second vertex neighboring the first vertex of the virtual square.

A display device with an integrated touch screen according to an embodiment, includes a display panel including a touch screen provided in an active area of the display panel, and a display driver circuit provided in an inactive area of the display panel, the touch screen including a plurality of driving electrodes, each of the driving electrodes including a plurality of sub driving electrodes positioned in the active area of the display panel but electrically connected to each other in the inactive area of the display panel, the touch screen further including a plurality of sensing electrodes disposed between the sub driving electrodes and formed in the active area of the panel, and the display driver circuit configured to apply a common voltage to the driving electrodes and the sensing electrodes or a touch driving voltage to the driving electrodes according to a driving mode of the display panel.

Disclosed is a display device for use of a surface display of an arbitrary shape, including a plural number of display element units, each made up of a circuit that forms a single stage of a scanning circuit and a pixel circuit connected to an output of the scanning circuit, are arranged in a unicursal fashion on a display substrate.

To provide a liquid crystal display device which can improve viewing angle characteristics and a driving method of the liquid crystal display device, and an electronic device including the liquid crystal display device. In a liquid crystal display device which performs display by aligning liquid crystal molecules at a tilt or radially at a tilt, one pixel is divided into a plurality of regions (sub-pixels) and a signal applied to each sub-pixel is made different every desired period. Alternatively, a signal applied to each sub-pixel is made different with respect to an adjacent pixel. To improve viewing angle characteristics by changing transmittance of the liquid crystal molecules every desired period in addition to improving the viewing angle characteristics of a viewer by making the liquid crystal molecules slanted to increase directions of alignment.