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: 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. Controlling the voltages Vda enables the specification of the output current value of the driver TFT Q1 regardless of its threshold voltage Vth.

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 memory circuit is caused to retain a voltage corresponding to largest tone data, then a voltage corresponding to tone data except for the largest tone data is applied to a liquid crystal element, and the voltage corresponding to the largest tone data is supplied from the memory circuit to the liquid crystal element. The development of moving picture breakups can be suppressed with a display producing a time-division gray-scale display, without having to carry out a display scanning operation for every display.

Abstract: In a display device, an active element (A) captures data of a signal line into a memory element while the active element (A) is selected by a selection line. The active element applies a reference voltage to an organic EL element according to storage contents of the memory element, thereby performing a storage holding operation for each pixel while preventing rewriting of the same data so as to save power. In order to realize multi-gray-level display, the display device reduces the number of wires and power consumption.

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: 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 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: 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: 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, which is related to the capacitor, for keeping the signal level captured by the first TFT; a second TFT matched with the corresponding at least one pixel memory; and a bit selecting line for selective-driving the second TFT, wherein, when a scanning signal line is selected, a 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. On this account, it is possible to precisely match the display period of each bit with the weight of each bit by a simple controlling method in which the scanning is carried out line by line.

Abstract: A memory circuit is caused to retain a voltage corresponding to largest tone data, then a voltage corresponding to tone data except for the largest tone data is applied to a liquid crystal element, and the voltage corresponding to the largest tone data is supplied from the memory circuit to the liquid crystal element. The development of moving picture breakups can be suppressed with a display producing a time-division gray-scale display, without having to carry out a display scanning operation for every display.

Abstract: In a display device, an active element (A) captures data of a signal line into a memory element while the active element (A) is selected by a selection line, and the active element that makes up an electro-optical element applies a voltage of a reference line to an organic EL element according to storage contents of the memory element, thereby performing storage holding operation for each pixel while preventing rewriting of the same data so as to save power. In order to realize multi-gray-level display, the display device reduces the number of wires and power consumption. In order to do so, more specifically, two or more memory elements are provided in accordance with a desired gray-scale for display. Further provided are active elements (B), each of which is associated with each memory element, and bit selection lines routed to be shared by control input terminals of the active elements (B) having the equivalent bit order to each other, either one of the bit selection lines being selected at a time.

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 liquid crystal optical apparatus includes a pair of substrates; a liquid crystal layer provided between the pair of substrates and formed of a liquid crystal material in which an aligning direction of liquid crystal molecules changes in accordance with a voltage applied thereto; a plurality of first electrodes provided on one of the pair of substrates; and at least one second electrode provided on the other of the pair of substrates. A frame period for applying a signal to the liquid crystal layer includes a first period in which a voltage is applied to the at least one second electrode, and a write signal for writing information to the liquid crystal layer is applied to one of the plurality of first electrodes, and a second period in which a voltage is applied to the at least one second electrode, and a reset signal for deleting the information written in the liquid crystal layer in the first period is applied to the one of the plurality of first electrodes.

Abstract: A segmented electrode drive circuit of a passive-matrix type liquid crystal display apparatus includes one analog switch in each of segmented electrodes, supplies “0” as a control signal in the first slot of a three-slot selecting period so as to make the electrical potential of a segmented electrode zero. “1” is supplied as a control signal in the second slot so as to bring the output terminal of an analog switch selected by the data signal into a high-impedance state. As a result, the electric potential of the segmented electrode in the high-impedance state becomes an average electric potential of scanning electrodes capacitive-coupled with the segmented electrode.

Abstract: A light modulating device, such as a ferroelectric liquid crystal display (FLCD) comprises an addressable matrix and modulating elements or pixels and associated circuitry for selectively addressing each element in a series of addressing frames in order to vary the transmission level of each element relative to the transmissions levels of the other elements. Such addressing utilises a temporal dither addressing scheme for addressing at least part of each element within each frame with different combinations of temporal dither signals applied to separately addressable temporal bits within the frame to produce different transmission levels. In order to enable a large number of grey levels to be produced whilst limiting the perceived errors at transitions between different grey levels, the temporal bits are addressed in a first order in a first frame (or in a first spatial location) and in a second order, which is different to the first order, in a second frame (or in a second spatial location).

Abstract: A ferroelectric liquid crystal panel including a plurality of scanning electrodes, a plurality of signal electrodes crossing the scanning electrodes, a ferroelectric liquid crystal material having two stable orientation states corresponding to different memory angles and provided at intersections of the plurality of scanning electrodes and the plurality of signal electrodes to form a plurality of pixels is driven. The plurality of pixels each have a first threshold characteristic regarding a voltage for switching a display state of the pixel into a non-display state and a second threshold characteristic regarding a voltage for switching the non-display state of the pixel into the display state.