Pioneer Corporation

Pioneer Electronic Corporation

Hitachi, Ltd.

Masami Tsuchida

Shinichi Ishizuka

Hideo Ochi

Tsuyoshi Sakamoto

Yoshiyuki Okuda

Satoshi Miyaguchi

Kiyoshi Iwai

Kiichiro Koguchi

Tokihiro Takahashi

Fumihiko Miyamoto

Shiro Suzuki

Hisashi Yagi

Toshio Ohtani

Hiroshi Kawaguchi

Hiroo Okamoto

Takao Arai

Junichi Yoshio

Kenichi Kawasaki

Yoshimi Iso

Hitoshi Nakada

Ichiro Miyake

Naomi Amemiya

Masami Suzuki

Masashi Tanabe

Takashi Kikuchi

Taizo Ishida

Yoshihiro Ushigusa

Shinichi Wakumura

Jun Funaki

Yoshinori Fukuda

Disclosed is a display apparatus which can improve the characteristics of TFTs used to select and drive self-emissive elements such as OLEDs. The display apparatus has row electrodes, column electrodes, and a driving unit. The self-emissive elements are formed in regions corresponding to intersections of the row electrodes with the column electrodes. Element driving circuits are formed for driving the self-emissive elements. Each of the element driving circuits includes a selection transistor, a capacitor, and a driving transistor. The driving unit applies a reverse bias to a control terminal of the driving transistor in a non-emission period in which the self-emissive element is not supplied with a driving current.

Display apparatus and method of driving same

A display panel driving device and driving method for providing high quality images without irregular luminance even after long-time use. The value of the light-emission drive current flowing when causing each light-emission elements bearing each pixel to independently emit light in succession is measured, then the luminance is corrected for each input pixel data based on the above light-emission drive current values, associated with the pixels corresponding to the input pixel data. According to another aspect, the voltage value of the drive voltage is adjusted in such a manner that one value among each measured light-emission drive current value becomes equal to a predetermined reference current value. According to a further aspect, the current value is measured while an off-set current component corresponding to a leak current of the display panel is added to the current outputted from the drive voltage generator circuit and the resultant current is supplied to each of the pixel portions.

Panel display driving device and driving method

A drive unit which can prevent the decrease of the luminance of a self-luminous device due to degradation or a change is electric characteristic thereof. The drive unit has a semiconductor device having an electric characteristic almost the same as the that of the self-luminous device, and drives the semiconductor device in accordance with the frequency of light emission of the self-luminous device. The device generates a characteristic change detection signal indicating the degree of a change in an electric characteristic of the semiconductor device, and supplies the self-luminous device with a drive signal having a current level or a voltage level based on the characteristic change detection signal.

Drive unit of self-luminous device with degradation detection function

A method for producing a fixed display panel using a matrix display panel. In the method, the holding state of memory elements of a plurality of pixels of the matrix display panel is changed to one of two values, in accordance with the predetermined fixed pattern, m driving lines are jointly connected as a first electrode and n scanning lines are jointly connected as a second electrode.

Fixed pattern display panel and method for producing fixed pattern display panel

A touch panel integrated type display apparatus has a display portion on one surface and a touch panel on the other surface. An input screen for operating the touch panel is displayed on a display plane of the display portion, and an operating position of the touch panel recognizable on the display plane referring to the input screen.

Touch panel integrated type display apparatus

A display apparatus is capable of displaying an image at a proper luminance based on an input video signal without being influenced by temperature changes or time-dependent changes. The display apparatus is provided with a monitoring circuit constituted by a monitoring luminescent device, a reference current source of a reference drive current for causing the monitoring luminescent device to emit light at a luminance of K %, a transistor for supplying the reference drive current to the monitoring luminescent device, and a switch for connecting an output end of the reference drive current and a control end of the transistor. An input video signal is corrected to have a level according to the voltage value on the control end of the transistor driving the monitoring luminescent device when the luminance indicated by the video signal is K % of a maximum luminance level.

Display apparatus with luminance adjustment function

An active matrix organic electroluminescence unit which is easy to manufacture. The organic electroluminescence unit comprises an organic material layer formed on a surface of the electrode panel, a dielectric layer formed near the organic material layer on the surface of the electrode panel, a metal electrode formed continuous to the surfaces of the organic material layer and the dielectric layer, and having a portion corresponding to the organic material layer functioning as a control electrode, and an organic electroluminescence element formed on the organic material layer. According to a second aspect, the organic electroluminescence unit comprises an insulating film for covering a protruding electrode formed at a position near an intersection with a data line on a scanning line, and formed with data lines and first metal electrodes, respectively, on the surface thereof, a first organic material layer for covering each of these data lines, first metal electrodes and insulating film, an electrode panel, a second organic material layer formed on the surface of the electrode panel, a second metal electrode formed continuous to be in contact with each of the surface of the second organic material layer and each of the first metal electrodes, with a portion corresponding to the second organic material layer functioning as a gate electrode, and an organic electroluminescence element formed on the second organic material layer.

Organic electroluminescence unit

Improvement for extending the service life of a self-emitting panel and for reducing the power consumption thereof. The self-emitting panel is driven based on intensity-reduced data. The intensity-reduced data is obtained by applying intensity reduction processing on each frame of the image frame data to be displayed.

Method and apparatus for driving self-emitting panel

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.

Light emitting element and production process thereof

A display apparatus and a driving circuit of a display panel, in which even when an anode line driving circuit is made of a plurality of IC chips, light emission luminance values on the display panel can be uniformed. The display apparatus is made of a plurality of driving circuits having a plurality of light-emission drive current sources each for generating a light-emission drive current to allow a light emitting element of the display panel to emit the light and supplying the light-emission drive current to first electrode lines of the display panel. At least one of the driving circuits is provided with a drive current control circuit for adjusting a current amount of the light-emission drive current to be generated by the driving circuit on the basis of the light-emission drive current generated from the other driving circuit.

Display apparatus and driving circuit of display panel

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.

Organic EL element and method of making the same

A light emitting display device having a plurality of light emitting elements connected to intersecting points of a plurality of anode lines and cathode lines arranged in a matrix. Either one of the anode lines and the cathode lines are used as scanning lines, and the others are used as driving lines. While one of the scanning lines is scanned during a scanning period, a driving source is synchronously connected to one of the driving lines so that a light emitting element connected to an intersecting point of the one scanning line and the one driving line is caused to emit light. Immediately after the scanning period of the one scanning line is started, a first driving source is connected to the one driving line, and subsequently, in exchange for the first driving source, a second driving source is connected to the one driving line.

Light emitting display device in which light emitting elements are sequentially connected to a first drive source and a second drive source during emission of light and a method therefore

Light emitting display device and driving method therefor

A method is provided for driving a luminescent display which includes a plurality of luminescent units adapted to be selected for light emission, so as to display an image. This method is characterized in that during a predetermined period, a reverse voltage having a direction opposite to that of a voltage to be applied for light emission of a luminescent unit, is applied to each luminescent unit.

Method of driving a luminescent display

An EL device driving apparatus enables substantial light emission luminance characteristics to be kept constant even if an environmental temperature fluctuates. The apparatus includes a driving unit for selectively supplying a light emission driving energy to EL devices, a temperature sensing unit for sensing an operation temperature, and a temperature compensating unit for changing the light emission driving energy in accordance with the operation temperature.

Growing community of inventors

Tsurugashima, Japan

Masami Tsuchida