Patent application number | Description | Published |
20080238842 | LIQUID CRYSTAL DEVICE, DRIVING CIRCUIT FOR LIQUID CRYSTAL DEVICE, METHOD OF DRIVING LIQUID CRYSTAL DEVICE, AND ELECTRONIC APPARATUS - A liquid crystal device includes a plurality of pixels disposed in the shape of a matrix of n rows×m columns (where n and m are natural numbers equal to or larger than two), n scanning lines, 2m data lines including pairs of a first data line and a second data line for each column of the plurality of pixels, and a data line driving circuit that generates a first gray scale voltage corresponding to higher bits acquired by dividing gray scale data of plural bits into the higher bits and lower bits and generates a second gray scale voltage corresponding to the lower bits. Each one of the plurality of pixels includes a first switching element and a second switching element which are controlled to be turned on or off by the common scanning lines, a first pixel electrode to which the first or second gray scale voltage is supplied from the first data line through the first switching element, and a second pixel | 10-02-2008 |
20080238843 | LIQUID CRYSTAL DEVICE, DRIVING CIRCUIT FOR LIQUID CRYSTAL DEVICE, METHOD OF DRIVING LIQUID CRYSTAL DEVICE, AND ELECTRONIC APPARATUS - A liquid crystal device includes a substrate having pixel electrodes disposed in correspondence with intersections of scanning lines and data lines, a common electrode disposed to face the pixel electrodes, a liquid crystal interposed between the substrate and another substrate, a scanning line driving circuit that sequentially supplies selection voltages for selecting the scanning lines to the scanning lines, a regular voltage source that supplies voltage to the common electrode corresponding to a pixel in a selection period, an auxiliary voltage source that supplies voltage to the common electrode corresponding to a pixel in a non-selection period, a control circuit that selects the voltage and supplies the selected voltage to the common electrode, and a data line driving circuit that alternately supplies a positive-polarity image signal and a negative-polarity image signal to the data lines when the scanning line is selected. | 10-02-2008 |
20100039411 | METHOD OF DRIVING PIXEL CIRCUIT, LIGHT-EMITTING APPARATUS, AND ELECTRONIC APPARATUS - A pixel circuit includes a light-emitting device, a driving transistor, and a storage capacitance. The method of driving the pixel circuit includes: performing a compensating operation of asymptotically causing the voltage across the storage capacitance to converge with a voltage corresponding to a threshold voltage of the driving transistor, over a time duration variably set according to a gradation value, in a first period; changing the voltage across the storage capacitance from a voltage set by the compensating operation to a voltage corresponding to the gradation value by applying a gradation voltage corresponding to the gradation value from a signal line to a gate of the driving transistor, in a second period; and supplying a driving current corresponding to the voltage across the storage capacitance to the light-emitting device by stopping applying a voltage to the gate, in a third period. | 02-18-2010 |
20100053141 | PIXEL CIRCUIT DRIVING METHOD, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - Provided is a method of driving a plurality of pixel circuits. The pixel circuits are disposed corresponding to intersections between a plurality of scanning lines and a plurality of signal lines. Each of the pixel circuits includes: a light emitting element; a driving transistor connected to the light emitting element in series; a holding capacitor interposed between a gate of the driving transistor and a path between the light emitting element and the driving transistor; and a selection switch electrically interconnecting the signal line and the gate of the driving transistor at the time of the selection of the scanning line. The method of driving the pixel circuits includes: supplying time-divisionally a gradation potential to each signal line during a first period of each of a plurality of unitary periods, selecting the scanning line during a second period after elapse of the first period of the corresponding unitary period, and supplying the gradation potential to the gate of the driving transistor of each of the pixel circuits corresponding to the selected scanning line; controlling the driving transistor of each of the pixel circuits corresponding to one scanning line of the plurality of scanning lines to be in an ON state, supplying a reference potential from an electric supply line to the gate of the corresponding driving transistor, and executing a first compensation operation for making a voltage across the holding capacitor approach asymptotically to a threshold voltage of the driving transistor before start of the unitary period corresponding to the one scanning line; and supplying driving current to the light emitting element in accordance with the voltage across the holding capacitor after elapse of the unitary period corresponding to the one scanning line. | 03-04-2010 |
20100053233 | METHOD OF DRIVING PIXEL CIRCUIT, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - There is provided a method of driving a pixel circuit that includes a light emitting element; a driving transistor that is connected to the light emitting element in series; a storage capacitor that is interposed between a path, which is formed between the light emitting element and the driving transistor, and a gate of the driving transistor; a selection switch that is interposed between the gate of the driving transistor and a signal line; and a first control switch that is interposed between the gate of the driving transistor and the signal line and is connected to the selection switch in series. | 03-04-2010 |
20100079433 | PIXEL CIRCUIT DRIVING METHOD, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - Provided is a method of driving a pixel circuit including a light emitting element and a driving transistor which are connected in series to each other, and a storage capacitor disposed between a path between the light emitting element and the driving transistor and a gate of the driving transistor, the method including the steps of: supplying a driving signal to a gate of the driving transistor; and changing the potential of the driving signal over time so that the time rate of change of the potential of the driving signal at the point in time when the supply of the driving signal stops becomes the time rate of change corresponding to a specified gradation of the pixel circuit. | 04-01-2010 |
20100079507 | PIXEL CIRCUIT DRIVING METHOD, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - Provided is a method of driving a pixel circuit including a light emitting element and a driving transistor which are connected in series, and a storage capacitor disposed between the path between the light emitting element and the driving transistor and the gate of the driving transistor, the method including the steps of: supplying a driving signal, of which the time rate of change of the potential varies over time, to a gate of the driving transistor; stopping the supply of the driving signal at a point in time which is set to be variable in accordance with a gradation specified for the pixel circuit; and supplying a driving current corresponding to an open circuit voltage of the storage capacitor to the light emitting element. | 04-01-2010 |
20100188377 | LIGHT-EMITTING DEVICE AND METHOD FOR DRIVING THE SAME, AND ELECTRONIC DEVICE - A light-emitting device includes a light-emitting element that emits light of an amount based on the size of a driving current; a driving transistor, the gate thereof being electrically connected to a first node, that outputs a current flowing between the drain-source as the driving current; and a control unit that supplies a first data potential to the first node and supplies a current to the driving transistor so as to set the voltage between the gate and source of the driving transistor to a compensated voltage based on the mobility of the driving transistor, and then supplies a second data potential determined in accordance with the first data potential to the first node. | 07-29-2010 |
20100302228 | LIGHT EMITTING APPARATUS, METHOD FOR DRIVING LIGHT EMITTING APPARATUS AND ELECTRONIC APPARATUS - A light emitting apparatus includes a pixel circuit, and a drive circuit which drives the pixel circuit. The pixel circuit has a light emitting device, a driving transistor connected in series to the light emitting device, a capacitative element arranged between a gate and a source of the driving transistor, a first switching device arranged between the gate of the driving transistor and a signal line corresponding to the pixel circuit, and a second switching device arranged between the source of the driving transistor and a reset line. | 12-02-2010 |
20100321422 | LIGHT EMITTING APPARATUS, METHOD OF DRIVING LIGHT EMITTING APPARATUS, AND ELECTRONIC APPARATUS - Provided is a light emitting apparatus where each pixel circuit is provided with the reset transistor, which is disposed between the node of the pixel circuit and the first feed line corresponding to the adjacent pixel circuit in the second direction as viewed from the pixel circuit. In addition, in the initialization period before the selection period, in which the scan line corresponding to the pixel circuit is selected, and in the compensation period, the reset transistor of the pixel circuit is set to the ON state, and the values of the power supply voltages output to the first feed line corresponding to the pixel circuit and the first feed line corresponding to the adjacent pixel circuit in the second direction as viewed from the pixel circuit are variably controlled, so that the initialization or compensation operation of the pixel circuit is performed. | 12-23-2010 |
20100328278 | Light Emitting Device, Electronic Device, and Method for Driving Pixel Circuit - A light emitting device includes: a pixel circuit; and a driving circuit that drives the pixel circuit, wherein the pixel circuit includes: a light emitting element; a driving transistor that is connected to the light emitting element in series; a storage capacitor that is located between a gate of the driving transistor and a source of the driving transistor; and a selecting transistor that is located between the gate of the driving transistor and a signal line that corresponds to the pixel circuit, after a writing period starts, the driving circuit sets a potential of a selection signal to a selection potential to turn on the selecting transistor and outputs a data potential to the signal line to cause a current corresponding to the data potential to flow in the driving transistor, the selection signal being to be supplied to the gate of the selecting transistor, the data potential being changed over time, and after the driving circuit sets the potential of the selection signal to the selection potential and outputs the data potential, the driving circuit changes, from the selection potential, the potential of the selection signal over time until the end time of the writing period to turn off the selecting transistor and thereby stop supply of the data potential and sets, to a rate corresponding to a gradation specified for the pixel circuit, a rate of change of the data potential at the time when the supply of the data potential to the driving transistor is stopped. | 12-30-2010 |
20140055508 | METHOD OF DRIVING PIXEL CIRCUIT, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - There is provided a method of driving a pixel circuit that includes a light emitting element; a driving transistor that is connected to the light emitting element in series; and a storage capacitor that is interposed between a gate of the driving transistor and a path, which is formed between the light emitting element and the driving transistor. | 02-27-2014 |
20140085347 | ELECTRO-OPTIC APPARATUS, DRIVING METHOD THEREFOR, AND ELECTRONICS DEVICE - A drive circuit is configured to, during a first period, sequentially select each of pairs of odd-number-th and even-number-th scanning lines and write an off electric potential into pixels corresponding the selected scanning lines; during a second period, sequentially select each of pairs of odd-number-th and even-number-th scanning lines and write gray-scale electric potentials in accordance with the selected odd-number-th scanning line into pixels corresponding to the selected odd-number-th and even-number-th scanning lines; and during a third period, sequentially select each of even-number-th scanning lines and write gray-scale electric potentials in accordance with the selected even-number-th scanning line into pixels corresponding to the selected scanning line. A common electric potential supply circuit reverses the polarity of a common electric potential during a polarity reverse period between the first period and the second period. | 03-27-2014 |
20140240306 | PIXEL CIRCUIT DRIVING METHOD, LIGHT EMITTING DEVICE, AND ELECTRONIC APPARATUS - Provided is a method of driving a pixel circuit including a light emitting element and a driving transistor which are connected in series to each other, and a storage capacitor disposed between a path between the light emitting element and the driving transistor and a gate of the driving transistor, the method including the steps of: supplying a driving signal to a gate of the driving transistor; and changing the potential of the driving signal over time so that the time rate of change of the potential of the driving signal at the point in time when the supply of the driving signal stops becomes the time rate of change corresponding to a specified gradation of the pixel circuit. | 08-28-2014 |