Joled Inc.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Toshiyuki Kato

Kouhei Ebisuno

Shinya Ono

Yosuke Izawa

Takahiro Kobayashi

Hiroshi Mitani

Hirofumi Nakagawa

Takashi Osako

Yasuo Segawa

Kohei Yamaguchi

Tetsurou Nakamura

Masahiro Ueda

Kohei Ebisuno

Rie Odawara

Miki Fukushima

Yasunori Negoro

Kazushi Sugiyama

Takashi Umemoto

Masaru Nishimura

Tomohiro Mitsuyama

An electrolytic capacitor includes a capacitor element that includes an anode body that has a porous structure, a dielectric layer disposed on a surface of the anode body, and a solid electrolyte layer that covers at least a part of the dielectric layer. The anode body contains a first group metal including at least one selected from the group consisting of tantalum, niobium, titanium, aluminum, and zirconium. The dielectric layer contains an oxide of the first group metal and a second group metal including at least one selected from the group consisting of iron, chromium, copper, silicon, molybdenum, sodium, and nickel. A ratio X of a total number of atoms of the second group metal to a total number of atoms of the first group metal in the dielectric layer is equal to or less than 100 ppm.

Electrolytic capacitor comprising an anode body having a porous structure and containing a metal

A current limiting circuit includes: a gain calculation circuit which calculates a screen power value based on pixel values and calculates a gain based on the screen power value; and a gain multiplication circuit which multiplies the pixel values by the gain, and when a maximum value of the pixel values exceeds a first threshold value, the gain calculation circuit calculates the screen power value by use of a common pixel value greater than or equal to the maximum value instead of the pixel values, and when the screen power value exceeds a control target power value, the gain calculation circuit sets the gain to a ratio of the control target power value with respect to the screen power value, and when the screen power value is less than or equal to the control target power value, the gain calculation circuit sets the gain to 1.

Current limiting circuit, display device, and current limiting method

A processing circuit processes video signals for a display device which includes a display panel including pixels each having a self light emitting element and a current limiting circuit limiting a current to the pixels. The processing circuit includes: a frame memory storing video signals of a previous frame; and a signal processer which: compares a luminance represented by a video signal of the current frame corresponding to a pixel and a luminance represented by a video signal of the previous frame corresponding to the pixel; outputs the video signal of the current frame in a case where the luminance represented by the video signal of the current frame is equal to or smaller than the luminance represented by the video signal of the previous frame or equal to or smaller than a predetermined threshold value; and outputs a weighted average of the video signal of the current frame and the video signal of the previous frame in any other case.

Processing circuit, display device, and processing method for reducing current during luminance change

A signal processing circuit includes an accumulator circuit that accumulates display history information regarding light-emitting devices, and a detection circuit that detects the degree of deterioration of a display panel by the accumulated display history information and detects a rotation-recommended state of the display panel on the basis of the degree of deterioration. In the case where the display panel is divided into a plurality of blocks each including the same number of pixel circuits, the detection circuit detects the degree of deterioration for each of the blocks, and if the number of the blocks whose degrees of deterioration are greater than or equal to a first threshold value determined in advance is greater than or equal to a predetermined number, detects that the display panel is in the rotation-recommended state.

Signal processing circuit, display device, and recording medium

The present disclosure provides a display device driving method and the like that can suppress degradation of display quality at the time of switching to a video based on a video signal from an external signal source. The display device driving method according to the present disclosure includes: receiving a training signal transmitted from an external signal source; after receiving the training signal, transmitting a lock signal to the external signal source at a timing based on an internal synchronization signal of the display device; after transmitting the lock signal, receiving a video signal that is transmitted from the external signal source and is synchronous with an external synchronization signal; and displaying a video by using the video signal received from the external signal source.

Display device driving method and video display apparatus

A display device includes pixel units, a source driver and a control unit. The source driver applies voltage corresponding to gray level values to data signal lines. Each of the pixel units includes a light-emitting element, a capacitance element and a driving transistor. The light-emitting element emits light according to a driving current. The capacitance element accumulates charge corresponding to a voltage at a connected data signal line. The driving transistor supplies the driving current corresponding to the accumulated charge to the light-emitting element. The control unit decreases voltage(s) to be outputted from the source driver, when an appearance frequency of display pixels having a low gray-level value is lower than a first reference frequency, or when an appearance frequency of display pixels having a high gray-level value is lower than a second reference frequency.

Display device and display method for reducing power consumption of a source driver

A video signal processing method includes: dividing a current frame which is to be processed into a plurality of blocks which are predetermined rectangular blocks; calculating, for each of the plurality of blocks divided into in the dividing, a feature quantity relating to luminance of pixels in the block; calculating first correction data, based on a feature quantity calculated from each of first blocks located above a first horizontal boundary in the current frame and a feature quantity calculated from each of one or more blocks located below a first horizontal boundary in a previous frame which has been processed immediately before the current frame; and correcting luminance of pixels in each of the first blocks in the current frame, based on the first correction data calculated in the calculating.

Video signal processing method, integrated circuit for video signal processing, and video signal processing apparatus

An EL display apparatus includes: gate driver ICs (i. e., gate driver circuits); a plurality of pixels; gate signal lines each transmit a selection voltage for selecting a pixel from the pixels and non-selection voltage for placing a pixel in a non-selection state; and TCON. The pixels each include: a driving transistor; an EL element; a first switching transistor; and a second switching transistor. The gate driver ICs each include scanning and outputting buffer circuits which are connected to TCON to which an output signal of each of the scanning and outputting buffer circuits is inputted.

EL display apparatus having a control circuit for protection of a gate driver circuit

A display device includes a voltage drop amount calculating circuit that regulates a power source voltage, a power wire network in the organic EL display unit includes a row-wise resistance component Rah and a column-wise resistance component Rav, and the voltage drop amount calculating circuit divides the organic EL display unit into blocks each made up of pixels in Xv rows and Xh columns, and sets, for each of the blocks, a row-wise resistance component Rah' to a value obtained by multiplying the resistance component Rah by (Xh/Xv), and sets, for each of the blocks, a column-wise resistance component Rav&#x2032; to a value obtained by multiplying the resistance component Rav by (Xv/Xh), thereby estimating a distribution, for the respective blocks, of amounts of voltage drop which occurs in the power wire, and regulates, based on the distribution, a voltage to be supplied to the display unit.

Display device and method of driving the same

A solid electrolytic capacitor comprising a capacitor element including a positive electrode which contains tantalum as a principal component and is composed of a porous sintered body, a positive electrode lead which contains niobium as a principal component and has a first end part embedded in the positive electrode and a second end part extending from the positive electrode, a dielectric layer which is disposed on a surface of the positive electrode and a part of a surface of the positive electrode lead, and a negative electrode layer disposed on the dielectric layer; an positive electrode terminal electrically connected to the second end part of the positive electrode lead; a negative electrode terminal electrically connected to the negative electrode layer; and a resin outer body covering the surfaces of the capacitor element, a part of the positive electrode terminal and a part of the negative electrode terminal, wherein a linear expansion coefficient of the resin outer body is larger than all of linear expansion coefficients of the positive electrode, the positive electrode lead, the positive electrode terminal, and the negative electrode terminal.

Solid electrolytic capacitor

A method of manufacturing an organic EL display apparatus including an organic EL panel having light emitting pixels each of which has an organic EL element (OEL) includes: lighting up lighting target pixels set from among the light emitting pixels; causing an imaging device to photograph the organic EL panel and receiving a photographed image from the imaging device; detecting the lighting target pixels using the photographed image; determining whether an undetectable pixel that cannot be detected is included among the lighting target pixels, using a result obtained in the detecting; increasing an amount of luminescence of the undetectable pixel to a detectable amount of luminescence, when it is determined that the undetectable pixel is included; and aligning a relative position of the organic EL display apparatus and the imaging device, using the result obtained in the detecting.

Method of manufacturing organic EL display apparatus, and inspection apparatus

A solid electrolytic capacitor includes: an anode body; a first dielectric layer formed on the anode body and including metal oxide; a second dielectric layer formed on the first dielectric layer and including an insulating polymer; a third dielectric layer formed on the second dielectric layer and including a dielectric substance having a higher dielectric constant than that of the metal oxide; and a solid electrolyte layer formed on third dielectric layer.

Solid electrolytic capacitor and method for manufacturing same

Display device includes: a power supplying unit which outputs at least a high-side or low-side output potential; an organic EL display unit which includes pixels and receives power supply from the power supplying unit; two or more detecting lines for transmitting a high-side or low-side applied potential applied to two or more pixels; a relay unit which outputs the high-side or low-side applied potentials transmitted by the detecting lines, to output lines fewer in number than the detecting lines; and a regulating unit which regulates at least the high-side or low-side output potential to be outputted by the power supplying unit, such that any one of potential difference between a reference potential and the high-side applied potential from the relay unit, potential difference between the reference potential and the low-side applied potential, and potential difference between the high-side applied potential and the low-side applied potential reaches a predetermined potential difference.

Display device and display device driving method for causing reduction in power consumption

A display device includes: a high-side potential variable-voltage source which outputs a high-side output potential and a low-side potential variable-voltage source which outputs a low-side output potential; an organic EL display unit in which pixels are arranged; a high-side potential difference detecting circuit which detects a high-side potential applied to a first pixel and a low-side potential difference detecting circuit which detects a low-side potential applied to a second pixel; a high-side potential voltage margin setting unit and a low-side potential voltage setting unit which regulate the output potential of the high-side potential variable-voltage source and the low-side potential variable-voltage source to set a potential difference between the high-side potential of the first pixel and a reference potential to a predetermined potential difference and set a potential difference between the low-side potential of the second pixel and a reference potential to a predetermined potential difference; and a signal processing circuit.

Display device

A display device includes: a power supplying unit which outputs at least one of a high-side output potential and a low-side output potential; a display unit in which pixels are arranged in a matrix and which receives power supply from the power supplying unit; a monitor wire arranged along a column direction of the pixels in the matrix, which has one end connected to at least one pixel inside the display unit, and is for transmitting the high-side potential to be applied to the pixel; and a voltage regulating unit connected to the other end of the monitor wire, which regulates at least one of the high-side output potential and the low-side output potential to be outputted by the power supplying unit, to set a potential difference between the high-side potential and the low-side potential to a predetermined potential difference.

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Osaka, Japan

Toshiyuki Kato