Patent application number | Description | Published |
20090109142 | EL DISPLAY DEVICE - A switch being turned off using an output open function of a power supply circuit, a cathode voltage Vss is not transmitted, an output terminal takes on a high impedance condition and, a probing being done into a pad of the cathode voltage Vss output terminal with a probe, an ammeter which measures a current is disposed between the probe | 04-30-2009 |
20090184984 | DRIVE METHOD OF EL DISPLAY APPARATUS - A drive method of an EL display apparatus that includes a display screen in which pixels each of which includes an EL element are provided in a form of a matrix. The drive method includes: aggregating or processing by use of a histogram an image signal applied to the EL display apparatus, and controlling a current flowing in the display panel according to at least one of a result of the aggregating the image signal or a result of the processing by use of the histogram. | 07-23-2009 |
20090201231 | EL DISPLAY DEVICE - An EL display device includes: a source driver circuit to output a video signal voltage; a gate driver circuit to select a pixel in a display screen; a first capacitor to maintain the video signal voltage; and a drive transistor to supply current to an EL element of a pixel. The video signal voltage is applied to the drive transistor to perform a predetermined operation, and written into the first capacitor. The video signal voltage maintained in the first capacitor is used to perform an offset cancel operation. | 08-13-2009 |
20100265277 | DRIVE METHOD OF EL DISPLAY APPARATUS - To provide a drive method capable of maintaining gradation display performance regardless of screen display brightness. | 10-21-2010 |
20100277401 | EL DISPLAY PANEL DRIVING METHOD - In order to charge and discharge parasitic capacitance of a source signal line sufficiently and program a predetermined current value into a pixel transistor, it is necessary to output a relatively large current from the source driver circuit. However, if such a large current is passed through the source signal line, the value of this current is programmed into the pixel, causing a larger than desired current to flow through an EL element. For example, if a 10 times larger current is used for programming, a 10 times larger current flows through the EL element, and thus the EL element illuminates 10 times more brightly. To obtain predetermined emission brightness, the time during which the current flows through the EL element can be reduced to 1/10 of one frame (1 F). This way, the parasitic capacitance of the source signal line can be charged and discharged sufficiently and the predetermined emission brightness can be obtained. | 11-04-2010 |
20140264305 | EL DISPLAY DEVICE - A EL display device has EL display panel including the a display area where a pixel is arranged in matrix, and a wiring pattern formed in a circumferential portion of the display area and supplying voltage to a pixel. The EL display panel includes a flexible substrate having an electrode connected to a source signal line or a gate signal line arranged thereon. The flexible substrate includes an anode reinforcement wiring and a cathode reinforcement wiring which are electrically parallel to the wiring pattern. | 09-18-2014 |
20140267191 | INFORMATION DISPLAY APPARATUS - Information display apparatus has a display panel comprising a display area where pixels of EL element are arranged in matrix, a source signal line supplying an image signal to the pixel, and a gate signal line supplying a signal controlling selection or non-selection of luminescence of the pixel. The display panel has a polarizing plate for polarizing an incident light. The display panel comprises a coordinate detection mark having the characteristics of changing the direction of incident light. | 09-18-2014 |
20140333609 | EL DISPLAY APPARATUS - An EL display apparatus according to the present invention includes EL device adapted to emit light at a luminance corresponding to a current fed thereto. A source driver outputs a current higher than a current corresponding to an image signal to the EL device through a source signal line. This operation charges/discharges a parasitic capacitance present in the source signal line. A transistor formed between the EL device and the source driver operates so that the EL device is fed with the current for only a part of a one-frame period. As a result, the El device emits light for only the part of the period. | 11-13-2014 |
20140361961 | EL DISPLAY DEVICE AND PRODUCTION METHOD THEREFOR - An EL display device includes an EL display panel including a plurality of pixels each having an EL element. Each of the pixels has: driving transistor that supplies a current to EL element; first switching transistor; and second switching transistors that supply video signals to the pixel. The EL display device also includes: gate driver circuit that is formed and disposed along with pixels on the EL display panel; and gate driver IC that is externally connected to gate signal lines. Gate driver circuit is connected to a gate terminal of first switching transistor, and gate driver IC is connected to gate terminals of second switching transistors. | 12-11-2014 |