Patent application number | Description | Published |
20080225023 | DRIVE CIRCUIT AND DRIVE METHOD OF LIGHT EMITTING DISPLAY APPARATUS - A drive circuit for a light emitting display apparatus including a pixel circuit having a light emitting device for emitting a light having brightness determined based on supplied current and a drive transistor for supplying the current to the light emitting device, comprises a threshold value correction circuit converting a second signal including a threshold voltage of the drive transistor and a data voltage, the second signal being output from the drive transistor when a first signal including the data voltage is input into the control electrode of the drive transistor, into a third signal including the threshold voltage of an inverted polarity and the data voltage or a voltage corresponding to the data voltage, to output the converted third signal to the pixel circuit. The pixel circuit includes a switch for supplying the third signal to the control electrode of the drive transistor. | 09-18-2008 |
20100194450 | THIN-FILM TRANSISTOR CIRCUIT, DRIVING METHOD THEREOF, AND LIGHT-EMITTING DISPLAY APPARATUS - In a light-emitting display apparatus including a plurality of pixels each including a light-emitting element and a driving circuit of the light-emitting element, and the driving circuit includes a plurality of thin-film transistors connected in parallel, a threshold voltage of the thin-film transistor reversibly changes according to a voltage applied between a gate and a source or between the gate and a drain of each of the thin-film transistors, by selecting and switching the plurality of thin-film transistors TFT | 08-05-2010 |
20110001747 | THIN FILM TRANSISTOR CIRCUIT, LIGHT EMITTING DISPLAY APPARATUS, AND DRIVING METHOD THEREOF - In order to suppress an influence of an electrical stress on a TFT characteristic in use of a TFT, a light emitting display apparatus according to the present invention comprises organic EL devices and driving circuits for driving the organic EL devices. The driving circuit includes plural pixels each having a thin film transistor of which a threshold voltage reversibly changes due to the electrical stress applied between a gate terminal and a source terminal, and a voltage applying unit which sets gate potential of the thin film transistor higher than source potential. The voltage applying unit applies the electrical stress between the gate terminal and the source terminal at a time when the thin film transistor is not driven, so as to drive the thin film transistor in a region that the threshold voltage is saturated to the electrical stress. | 01-06-2011 |
20110092016 | METHOD OF TREATING SEMICONDUCTOR ELEMENT - In a method of treating a semiconductor element which at least includes a semiconductor, a threshold voltage of the semiconductor element is changed by irradiating the semiconductor with light with a wavelength longer than an absorption edge wavelength of the semiconductor. The areal density of in-gap states in the semiconductor is 10 | 04-21-2011 |
20110175674 | METHOD OF DRIVING TRANSISTOR AND DEVICE INCLUDING TRANSISTOR DRIVEN BY THE METHOD - Disclosed is a method of driving a transistor including a semiconductor layer, a first insulating layer, a second insulating layer, a first conductive layer, and a second conductive layer such that the semiconductor layer is disposed between the first and second insulating layers, one surface of the first insulating layer opposite the other surface in contact with the semiconductor layer is in contact with the first conductive layer, one surface of the second insulating layer opposite the other surface in contact with the semiconductor layer is in contact with the second conductive layer. The method includes applying a voltage VBG that satisfies the relation of VBG≦VON | 07-21-2011 |
20110187888 | DRIVE CIRCUIT AND DRIVE METHOD OF LIGHT EMITTING DISPLAY APPARATUS - A drive circuit for a light emitting display apparatus including a pixel circuit having a light emitting device for emitting a light having brightness determined based on supplied current and a drive transistor for supplying the current to the light emitting device, comprises a threshold value correction circuit converting a second signal including a threshold voltage of the drive transistor and a data voltage, the second signal being output from the drive transistor when a first signal including the data voltage is input into the control electrode of the drive transistor, into a third signal including the threshold voltage of an inverted polarity and the data voltage or a voltage corresponding to the data voltage, to output the converted third signal to the pixel circuit. The pixel circuit includes a switch for supplying the third signal to the control electrode of the drive transistor. | 08-04-2011 |
20120107024 | IMAGE FORMING APPARATUS - An image forming apparatus includes image bearing members; a belt member contacting the image bearing members; electrostatic image forming portions for forming electrostatic images on the image bearing members; developing portions for forming toner images on the basis of the electrostatic images formed on the image bearing members; a first transfer portion for transferring the toner image and an electrostatic image index; a second transfer portion for transferring the toner image onto the belt member; a first detecting portion for detecting the electrostatic image index; a second detecting portion for detecting an electrostatic image index formed on a second image bearing member; an adjusting portion for adjusting a forming operation on the belt member on the basis of outputs of the first and second detecting portions; and a belt member charging portion for electrically charging the belt member before transfer of the electrostatic image index. | 05-03-2012 |
20140125712 | THIN FILM TRANSISTOR CIRCUIT, LIGHT EMITTING DISPLAY APPARATUS, AND DRIVING METHOD THEREOF - In order to suppress an influence of an electrical stress on a TFT characteristic in use of a TFT, a light emitting display apparatus according to the present invention comprises organic EL devices and driving circuits for driving the organic EL devices. The driving circuit includes plural pixels each having a thin film transistor of which a threshold voltage reversibly changes due to the electrical stress applied between a gate terminal and a source terminal, and a voltage applying unit which sets gate potential of the thin film transistor higher than source potential. The voltage applying unit applies the electrical stress between the gate terminal and the source terminal at a time when the thin film transistor is not driven, so as to drive the thin film transistor in a region that the threshold voltage is saturated to the electrical stress. | 05-08-2014 |
20140193170 | FIXING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A fixing film is formed by stacking a heating layer, an electrical conducting layer, and an insulation layer interposed between the heating layer and the electrical conducting layer. A current supplied from a secondary coil flows through stacked layers formed by the secondary coil, the heating layer, an electrical conducting member, and the electrical conducting layer. The electrical conducting member and electrical conducting layer function as a current return path. | 07-10-2014 |
20140233990 | IMAGE FORMING APPARATUS - A first position information formed on an conveyance body is read by an information detecting portion, and a second position information formed on a second image carrier is read by the information detecting portion. A control is made such that a position of an image on the second image carrier matches with a position of an image on the conveyance body from information read by the information detecting portion in transferring the image from the second image carrier to the conveyance body. The information detecting portion is held by a hold member and are disposed at a transfer region. | 08-21-2014 |
20140348524 | HEATING APPARATUS FOR HEATING A TONER IMAGE AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A non-contact power supply unit including a secondary coil supplies an alternating voltage to multiple heat generation layers provided in a heat generation film. In one of the heat generation layers, a loop is provided as a variable impedance circuit in which the impedance changes according to the frequency. A capacitance element in which the impedance changes according to the frequency is provided in the loop. The heat generation amounts of the heat generation layers are switched by changing the frequency of the alternating voltage generated in the secondary coil according to the size of the recording material that is the heating target. | 11-27-2014 |