Abstract: A switching transistor 3 is provided between a gate terminal of a driving TFT 1 and a drain terminal thereof. A first capacitor 2 is provided between the gate terminal of the driving TFT 1 and a source terminal thereof. The current control terminal of the driving TFT 1 is connected to a first terminal of a second capacitor 7. A second terminal of the second capacitor 7 is connected to the drain terminal of the driving TFT 1 via a switching transistor 9, and to a predetermined voltage line Va via a switching transistor 8. This allows restraint of variation of a current flowing, during a non-selection period, through a current driving light emitting element of a display apparatus, the current variation being caused by threshold voltage variation and mobility variation of the driving TFT. A specific example of the display apparatus including such a current driving light emitting element is an organic EL display apparatus.

Abstract: When the transistor Q3 is OFF, a predetermined potential is supplied to a potential wire Ui such that a switching transistor Q2 becomes ON. This changes a gate potential of a driving transistor Q1 from an ON potential to a threshold potential. Thereafter, the transistor Q2 is turned OFF, with the result that the potential of the potential wire Ui is changed (in cases where the transistor Q1 is a p-type transistor, the potential is decreased). With this, the transistor Q1 allows a current to constantly flows therethrough, irrespective of the threshold potential. This shortens time for setting an output current of the driving TFT for driving a current driving type display element.

Abstract: A display device includes: a gate driver for carrying out display scanning on pixels sequentially in a first direction of a TFT liquid crystal panel so as to set pixels to display states thereof according to information to be displayed by the pixels in the TFT liquid crystal panel. The pixels being arranged in two dimensions and being individually controllable in terms of the display state through illumination. There is a backlight, unit for illuminating the individual pixels with intensity of light which increases and subsequently decreases in synchronism with the display scanning carried out by the gate driver, but only after the display scanning. The arrangement enables the backlight flashing period to be determined independently from a TFT panel scanning period or response time of liquid crystal, ensures an extended operating time of a TFT panel, effects a display period equal to, or longer than, the black blanking type, and achieves higher contrast than the black blanking type.

Abstract: One embodiment of the present invention discloses a display device which can use a display element having a relatively large difference between a minimum gradation voltage and a maximum gradation voltage. A first selection period and a second selection period are included in a period (a scanning signal line selection period) in which each gate wiring is selected. In the first selection period, a first selection voltage for allowing every TFT included in a line, which is an object to be selected, to be in an ON state is applied to the gate wiring of the line which is the object to be selected. In a period between the first selection period and the second selection period, a non selection voltage is applied to the gate wiring which is the object to be selected and the voltage of an auxiliary capacity wiring corresponding to the gate wiring which is the object to be selected is changed.

Abstract: A first switching element Q6 is provided between a source line Sj and a voltage selection circuit 14, and second switching elements Q2 and Q4 are provided between sectional lines Sj(2) to Sj(0) formed by dividing the source line Sj. During a voltage application period, the first switch is turned ON and the second switches are turned ON or OFF, so that voltage according with bits in video data Din is applied to the sectional lines. During a voltage averaging period, the first switch is turned OFF and the second switches are turned ON, so that voltage on the source line Sj is equivalent to an average of the voltage applied to the sectional lines. The averaged voltage is applied to a pixel electrode Pij in a pixel circuit Aij including an active element Q1 in ON state. Thus, there are provided low-power consumption, high-yield display devices allowing the source lines to be driven without using operational amplifier circuits.

Abstract: A display device in accordance with the present invention includes: a gate driver for carrying out display scanning on pixels sequentially in a first direction of a TFT liquid crystal panel so as to set pixels to display states thereof according to information to be displayed by the pixels in the TFT liquid crystal panel, the pixels being arranged in two dimensions and being individually controllable in terms of the display state through illumination; and a backlight unit for illuminating the individual pixels with intensity of light which increases and subsequently decreases in synchronism with the display scanning carried out by the gate driver, but only after the display scanning.

Abstract: In one embodiment of the present invention, capacitors are provided in series between the source and gate of a transistor which is a driver TFT. A predetermined voltage is applied to contact of the capacitors in a first period so as to apply a data voltage to the gate of the transistor from a source line. In a second period, the transistor is threshold compensated. The contact of the capacitors is opened in the third period, thereby short-circuiting the capacitor to apply a voltage having been subjected to threshold compensation to a point between the gate and source of the transistor. This pixel circuit structure, in which the driver TFT driving an OLED or another current-driven-type display element is threshold compensated, contains a reduced number of elements per pixel to increases the number of display pixels.

Abstract: During first period, TFTs: and are set in ON and OFF states, respectively. Potential Va is fed into a source line Sj so that potential of pixel electrode is Va. During second period, the TFTs: and are set in the OFF and ON states, respectively. The potential Va is continuously fed into the source line Sj. This sets potential of node to Va, thereby changing the potential of the pixel electrode. During third period, the TFTs: and are set in the OFF state. This realizes a display device where high cost factors and power consumption increase are suppressed, and the effective value of voltage expressed by difference between potential applied to a driving potential input terminal and reference potential can have variance larger than amplitude of signal voltage fed into a data signal line, the variance corresponding to variation in the signal voltage.

Abstract: A display device in accordance with the present invention changes to Vc the voltage of a terminal of a capacitor C2 the other terminal of which is connected to the gate of a driver TFT Q1. Thus, a desired voltage Vda is fed from a source line Sj to the drain of the driver TFT Q1 so as to adjust the threshold voltage Vth of the driver TFT Q1. The device then changes the voltage of the terminal of the capacitor C2 to Va to render the gate voltage of the driver TFT Q1 Vda-Vth-Vc+Va. A power supply voltage Vp is fed from the source of the driver TFT Q1.

Abstract: In one embodiment, a display device of the present invention includes capacitors provided between a gate and a source of a driver TFT. During a select period, a voltage is fed to the gate terminal of the driver TFT, and a voltage is fed to the source terminal of the driver TFT. Thereafter, during a threshold correction period, the gate voltage of the driver TFT is retained to make the source voltage of the driver TFT equal to Vda?Vth (<Vcom). Subsequently, the gate voltage of the driver TFT is changed to control a current flowing between the drain and the source of the driver TFT.

Abstract: A display device which makes it possible to shorten a selection period per pixel while compensating variations in a threshold voltage of the driving transistor, and a method for driving the same are achieved. In a pixel circuit Aij, a potential wire Ui is set to a potential Vcc, a voltage of a gate wire Gi becomes Low, a voltage of a control wire Ri becomes High, and a voltage of a control wire Pi becomes High, so that a gate terminal of a driving TFT: Q1 has a potential of a data wire Dj. Moreover, a voltage of the gate wire Gi becomes High so as to compensate a threshold voltage of the driving TFT: Q1. Thereafter, a voltage of the control wire Pi becomes Low, and the potential wire Ui is set to a potential Vc, so that a voltage of a capacitor C1, i.e., a gate-source voltage of the driving TFT is changed. This causes a voltage of the control wire Ri to be Low, so that a driving current is flown into an organic EL: EL1.

Abstract: In a pixel circuit Aij, a driver TFT Q1, a switching TFT Q3, and an OLED EL1 are connected in series between a power supply line Vp and a common cathode Vcom. A capacitor C1 is connected between the gate of the driver TFT Q1 and the voltage line Ui. The switching TFT Q2 is connected between the gate and drain of the driver TFT Q1. A capacitor C3 is connected between the drain of the driver TFT Q1 and a source line Sj.

Abstract: A current driver circuit in a driver circuit generates, and maintains, a state where a drive current for an electro-optic device flows through a current output TFT and a capacitor, using a constant current output from a single constant current source during a non-drive controllable period for the pixel. The driver circuit performs the previous operation on each pixel. The current driver circuit then generates the drive current in the maintained circuit state and passes the drive current through a source line to the pixel which is in a drive controllable period by means of voltage state of the gate line, so as to control the driving of the pixel. Thus, in the pixel receiving the drive current, the drive current flows through the electro-optic device to effect a display. The current driver circuit for the electro-optic device is capable of inhibiting the current value from varying from one source line to another, while permitting construction based on a low temperature polysilicon TFT or CG silicon TFT.

Abstract: A switching transistor 3 is provided between a gate terminal of a driving TFT 1 and a drain terminal thereof. A first capacitor 2 is provided between the gate terminal of the driving TFT 1 and a source terminal thereof. The current control terminal of the driving TFT 1 is connected to a first terminal of a second capacitor 7. A second terminal of the second capacitor 7 is connected to the drain terminal of the driving TFT 1 via a switching transistor 9, and to a predetermined voltage line Va via a switching transistor 8. This allows restraint of variation of a current flowing, during a non-selection period, through a current driving light emitting element of a display apparatus, the current variation being caused by threshold voltage variation and mobility variation of the driving TFT. A specific example of the display apparatus including such a current driving light emitting element is an organic EL display apparatus.

Abstract: When time division gradation display is carried out by setting a display state of an electro-optic element capable of R-gradation display A times in one frame period, the present invention determines the weights of the bit data to be such as 20:21:22:23?1: . . . , in which a conventional ratio regulation of 20:21:22:23: . . . i.e., 1:2:4:8: . . . is changed by at least one part at or later the third bit so as to satisfy the relation of B<RA where B expresses the number of display gradations. With this arrangement, it is possible to realize the time division gradation display with a desirable number of scanning lines and the desirable bit weight ratio, without significantly changing the actually-recognized image. On this account, the range of the electro-optic device, capable of setting each stage of outputs in the frame period to be a desirable value, can be enlarged with respect to a matrix display device using the time division gradation display.

Abstract: Each pixel of an EL display panel includes a diode element, an organic EL element, and a capacitor. The cathode of the diode element, the anode of the organic EL element, and one of the electrodes of the capacitor are electrically connected to one another at a common terminal. The anode of the diode element is connected to a signal electrode. The other electrode of the capacitor is connected to a scanning electrode. The cathode of the organic EL element is connected to the scanning electrode. A forward direction of the diode element and a forward direction of the organic EL element coincide. The voltage between the scanning electrodes is controlled to control the current flowing through the organic EL element. As a result, it is possible to provide an emitter having stable luminance with improved efficiency, and an emitting device and a display panel employing such an emitter.

Abstract: A display apparatus is arranged such that each of a plurality of pixels formed on a display area has, for instance, an organic EL device as a display device, and each of the organic EL devices has a voltage variation section which can change the value of a display voltage supplied to each of the organic EL devices. Moreover, the display apparatus preferably includes voltage keeping sections for keeping the input voltage of the voltage variation sections and storage sections for storing image data. On this account, it is possible to further reduce the power consumption of the display apparatus and downsize the display apparatus as display means, so that the display apparatus can be suitably adopted as display means of a mobile device.

Abstract: A display in accordance with the present invention includes: photoelectric elements as pixels; scan signal lines for sequentially driving the photoelectric elements; video data signal lines for supplying video data signals to the photoelectric elements; and drive-switching elements, each provided for a different photoelectric element, for supplying, to the photoelectric elements, currents matching with the video data signals supplied from the video data signal lines, and further includes path selector switching elements, connected to the respective drive-switching elements, for selecting one of current injecting paths according to a scan signal from the scan signal lines, and a current measuring circuit to either one of the current injecting paths.

Abstract: A display device of the present invention is provided with (a) electro-optic elements respectively composed of an n-type TFT and an organic EL element, which are arranged in a matrix, each of the electro-optic elements being arranged in a vicinity of an intersection of a data line and a gate line, (b) a condenser for holding a potential so as to drive and display the electro-optic element, (c) a buffer circuit for outputting a potential supplied from the condenser, (d) a p-type TFT and an n-type TFT provided in series with the condenser, and (e) an n-type TFT provided between the data line and the p-type and n-type TFTs, wherein a plurality of the condensers are provided with respect to each of the electro-optic elements, and the plurality of condensers are connected to an output terminal of the buffer circuit. This reduces the number of TFTs required per 1 bit of memory element and reduces a scale of a driver circuit arranged around a display screen.

Abstract: A display apparatus conducting time-division gradation display is provided with: a capacitor for keeping a signal level captured by a first TFT; at least one pixel memory, for keeping the signal level captured by the first TFT; a second TFT matched with the corresponding pixel memory; and a bit selecting line for selectively-driving the second TFT, wherein, when a scanning signal line is selected, the first TFT sets the display signal level is set in the capacitor via the first TFT and the second TFT is selectively driven so that the display signal level is set in the at least one pixel memory, whereas the TFT is selectively driven so that a display signal level which has been displayed is switched to the display signal level supplied from the at least one pixel memory.