Abstract: Disclosed is an image pickup device capable of greatly reducing delay in drive signals supplied to field emission devices, and cross-talk and the like that originate in these drive signals. The image pickup device comprises a photoelectric conversion film for receiving incident light on one side thereof; a field emission layer having an electron emitting surface apart from and facing the other side of the photoelectric conversion film, and including a plurality of electron emission devices; and a drive layer formed on a back side of the field emission layer and including a plurality of device drive circuits for supplying drive signals to each of back electrodes of the plurality of electron emission devices.

Abstract: An apparatus for driving a light-emitting display controls the light-emission of light-emitting elements in such a manner that a driving current or driving voltage having a prescribed value to be supplied to the light-emitting elements is turned on or off by an on/off signal from a driving unit. The driving apparatus includes a pixel read section for reading the luminance values for the light-emitting elements in a frame period from an image signal and a ?? modulator which operates in a sub-frame period which is 1/n of the frame period according to the luminance values read by the pixel read section. The output of “1” or “0” from ?? modulator is served as the on/off signal. The driving apparatus can further includes a random data generator for providing random luminance values for the individual pixels.

Abstract: A display panel includes a number of light emitting elements arranged in a matrix fashion. A light emitting element driving circuit for use in the display panel can reduce fluctuations in brightness among the light emitting elements. A pulse supply circuit is formed so as to charge/discharge a capacitor based on a clock signal and drive the light emitting element based on the resulting discharge current. The amplitude of a drive current for each of the light emitting elements is not controlled by a transistor in a TFT circuitry, but controlled by external factors installed outside the display panel. The external factors may be a pulse supply circuit providing drive power source voltage and clock frequency. The external factors can be determined precisely.

Abstract: A display panel which comprises m driving lines, n scanning lines which intersect with the m driving lines, pixel portions each including two organic electroluminescence elements connected with each other in parallel with inverse polarity, which are connected to a driving line and a scanning line at each intersection, m first capacitive elements provided on the respective driving lines, and n second capacitive elements each of which is provided so as to correspond to one of the scanning lines, and a display device using the display panel.

Abstract: A light emitting circuit and a display device capable of providing refresh action to an organic electroluminescence element to which a diode is connected in series, in a comparatively easy structure, in order to improve the average luminance.

Abstract: In a light emission display drive method, a driver capable of performing control of three or more levels in the output brightness of each light emission element is provided and when the intermediate level is represented, a ?? modulator controls the distribution of the occurrence probability of each level, whereby multi-level gradation representation is conducted. At this time, one channel of ?? modulator is provided and a quantizer with “N-1”-value threshold, N-value output is used and the driver is controlled in response to output of the quantizer or separate ?? modulators are provided for weight multiple outputs and the input values to represent gradation are distributed through a distributor.

Abstract: Disclosed is an image pickup device capable of greatly reducing delay in drive signals supplied to field emission devices, and cross-talk and the like that originate in these drive signals. The image pickup device comprises a photoelectric conversion film for receiving incident light on one side thereof; a field emission layer having an electron emitting surface apart from and facing the other side of the photoelectric conversion film, and including a plurality of electron emission devices; and a drive layer formed on a back side of the field emission layer and including a plurality of device drive circuits for supplying drive signals to each of back electrodes of the plurality of electron emission devices.

Abstract: A light emitting circuit and a display device capable of providing refresh action to an organic electroluminescence element to which a diode is connected in series, in a comparatively easy structure, in order to improve the average luminance.

Abstract: An active type of light emission drive circuit includes a switching element which turns on in response to a scan pulse to allow a data signal to pass therethrough, a capacitive element for holding the data signal passed through the switching element during the ON state of the switching element, and a drive element for supplying a forward drive current to an organic EL element in accordance with the data signal held on the capacitive element to allow the organic EL element to emit light. The switching element is formed of a diode element that turns on by the potential difference between the scan pulse and the data signal when the scan pulse is supplied. A display device incorporating the drive circuit is disclosed.

Abstract: A display panel driving device has a simple substrate structure. Amorphous silicon material or organic semiconductor material can be used for the substrate structure. A data code wiring group which is the base of row addresses of the display panel, and an address electrode line wiring group, intersect each other. The two wiring groups sandwich a compound layer of an insulating film and a semiconductor film. By providing disconnected portions at prescribed intersecting points on the address electrode lines, MOS type transistors are formed at the disconnected portions. A logic circuit is configured for row address decoding, in which MOS type transistors are connected in series to a single address electrode line.

Abstract: An apparatus for driving a light-emitting display controls the light-emission of light-emitting elements in such a manner that a driving current or driving voltage having a prescribed value to be supplied to the light-emitting elements is turned on or off by an on/off signal from a driving unit. The driving apparatus includes a pixel read section for reading the luminance values for the light-emitting elements in a frame period from an image signal and a ?? modulator which operates in a sub-frame period which is 1/n of the frame period according to the luminance values read by the pixel read section. The output of “1” or “0” from ?? modulator is served as the on/off signal. The driving apparatus can further includes a random data generator for providing random luminance values for the individual pixels.

Abstract: A light emission display drive apparatus used as a light emission display drive circuit includes an at least second-order ?? modulator 3 for turning on/off a constant drive current or a constant drive voltage, thereby performing gradation control of each light emitting element. A pixel read section 2 reads the brightness value of each light emitting element in a predetermined period, the ?? modulator 3 performs ?? modulation in a predetermined period in response to the read brightness value, and an output change section 36 of the ?? modulator performs operations of detecting unevenness of a list of output pulses of the ?? modulation and dispersing the output pulses in the same light emitting element among light emitting elements, thereby performing multiple-step gradation control of the light emitting element.

Abstract: A display panel includes a number of light emitting elements arranged in a matrix fashion. A light emitting element driving circuit for use in the display panel can reduce fluctuations in brightness among the light emitting elements. A pulse supply circuit is formed so as to charge/discharge a capacitor based on a clock signal and drive the light emitting element based on the resulting discharge current. The amplitude of a drive current for each of the light emitting elements is not controlled by a transistor in a TFT circuitry, but controlled by external factors installed outside the display panel. The external factors may be a pulse supply circuit providing drive power source voltage and clock frequency. The external factors can be determined precisely.

Abstract: A display panel includes a number of light emitting cells arranged in a matrix. At least one drive circuit is associated with the light emitting cells. Each cell includes one light emitting element. A current mirror circuit is used in the drive circuit. The current mirror circuit has a primary transistor to drive a reference current source and a secondary transistor to drive the light emitting element. A pulse signal selects one of the primary and secondary transistors alternately. This switching operation by the pulse signal reduces irregularities in mirror ratio between the two transistors in each light emitting cell. As a result, the drive circuit(s) can suppress fluctuations in brightness among the light emitting cells of the display panel.

Abstract: A three-dimensional image display device including at least one transmissive light-emitting display panel and a second light-emitting display panel located behind the transmissive panel. Each of the transmissive and second light-emitting display panels has patterned conductors each extending in a horizontal or vertical direction. Each patterned conductor includes a plurality of light-emitting portions and a bus line extending in the horizontal or vertical direction and bridged and connected to the light-emitting portions so that the light-emitting portions of patterned conductors are arranged in two dimensions. Each light-emitting portion includes a light-emitting layer made of an organic compound exhibiting electroluminescence. Each patterned conductor is formed into a zigzag.

Abstract: An apparatus for driving a light-emitting display controls the light-emission of light-emitting elements in such a manner that a driving current or driving voltage having a prescribed value to be supplied to the light-emitting elements is turned on or off by an on/off signal from a driving unit. The driving apparatus includes a pixel read section for reading the luminance values for the light-emitting elements in a frame period from an image signal and a &Dgr;&Sgr; modulator which operates in a sub-frame period which is 1/n of the frame period according to the luminance values read by the pixel read section. The output of “1” or “0” from &Dgr;&Sgr; modulator is served as the on/off signal. The driving apparatus can further includes a random data generator for providing random luminance values for the individual pixels.

Abstract: A light emitting element capable of suppressing the deterioration of an organic thin film layer as light emitting layers is provided. The light emitting element comprises a light emitting body emitting light by impressing voltage and a rectifier connected in series with the light emitting body, the light emitting body contains the NPB thin film layer, and the rectifier has the NPB thin film layer.

Abstract: A display panel driving device has a simple substrate structure. Amorphous silicon material or organic semiconductor material can be used for the substrate structure. A data code wiring group which is the base of row addresses of the display panel, and an address electrode line wiring group, intersect each other. The two wiring groups sandwich a compound layer of an insulating film and a semiconductor film. By providing disconnected portions at prescribed intersecting points on the address electrode lines, MOS type transistors are formed at the disconnected portions. A logic circuit is configured for row address decoding, in which MOS type transistors are connected in series to a single address electrode line.

Abstract: The present invention relates to an organic EL light emitting element that can suppress deterioration of a light emitting layer and can provide a high light-emission intensity. This organic EL light emitting element includes a light emitting part and a rectifier part connected in series to the light emitting part. Both of the light emitting and rectifier parts include organic thin layers. The electrostatic capacity of the rectifier part is smaller than that of the light emitting part.

Abstract: An active type of light emission drive circuit includes a switching element which turns on in response to a scan pulse to allow a data signal to pass therethrough, a capacitive element for holding the data signal passed through the switching element during the ON state of the switching element, and a drive element for supplying a forward drive current to an organic EL element in accordance with the data signal held on the capacitive element to allow the organic EL element to emit light. The switching element is formed of a diode element that turns on by the potential difference between the scan pulse and the data signal when the scan pulse is supplied. A display device incorporating the drive circuit is disclosed.