Abstract: A self-luminous display panel including a first substrate, an insulating resin layer, self-luminous elements, a sealing layer, an attachment layer, and a second substrate, and the insulating resin layer includes an inner insulating sublayer and an outer insulating sublayer with a groove therebetween, the groove being provided in a peripheral region and surrounding an image display region, the attachment layer includes a peripheral sealing layer that is positioned inside a peripheral portion of the second substrate and a joining layer that is positioned in a range surrounded by the peripheral sealing layer, and when viewed in a cross section perpendicular to a main surface of the first substrate and across the groove, the peripheral sealing layer is at least partially positioned on the outer insulating sublayer, and an inner end portion of the peripheral sealing layer extends to the groove.

Abstract: A current limiting circuit includes: a delay circuit that receives a video signal, and outputs a delay signal obtained by delaying the video signal by a time period corresponding to one frame; a calculation circuit that receives the video signal, and calculates a gain by which the delay signal is to be multiplied, based on power consumption of the pixels corresponding to the delay signal and power consumption of the pixels corresponding to the video signal; and a gain multiplication circuit that multiplies the delay signal by the gain.

Abstract: A functional layer forming ink used in forming a functional layer of the self-luminous element by a printing method, the ink including functional material dissolved or dispersed in a mixed solvent including solvents having different boiling points. When one or more solvents are selected from the solvents of the mixed solvent in descending order of boiling point until a mass ratio of the selection to the mixed solvent is a defined ratio or more, the one or more solvents in the selection are included in a solvent group of solvents that have a contact angle of 5° or less with respect to a defined resin material.

Abstract: A control device is for use in a case where frame periods, each being a period in which one image continues to be displayed, vary in length within a given range or temporarily become stable in length on a frame-by-frame basis, and accurate lengths of the frame periods are not known beforehand. The control device changes a total number of subframe periods to reconfigure the frame period with n subframe periods, where n is an integer of two or more, regardless of the frame period input, and causes the display of the image. The control device includes a signal processor that outputs an output video signal according to a first input video signal on a subframe-period-by-subframe-period basis; and a controller that supplies the output video signal output from the signal processor and a control signal for controlling an operation of the display panel to the display panel.

Abstract: A pixel circuit driving method is a method for driving a pixel circuit that includes a drive transistor that supplies a current corresponding to a signal voltage supplied via a signal line, a write transistor connected between the signal line and a gate electrode of the drive transistor, and an organic EL element that emits light in accordance with the current. The pixel circuit driving method includes supplying a reference potential to the gate electrode of the drive transistor before a threshold correction preparation operation of making a gate-source voltage of the drive transistor higher than a threshold voltage of the drive transistor.

Abstract: A control device for a display panel for applications where a frame period in which a same image continues to be displayed varies from frame to frame within a certain range or the frame period is temporarily stable across frames and where a precise frame period is undetermined beforehand. The control device controls the display panel such that, when a frame having a length exceeding a preset number of lines is input, the display panel displays an image over a frame period corresponding to the preset number of lines and an added period added after the frame period. The added period includes one or more individual added periods each including a light emission period and a light extinction period, and the one or more individual added periods are each a period corresponding a predetermined number of lines.

Abstract: A display device includes: a plurality of pixels; a plurality of write signal lines to which a control signal for selecting a pixel row in which a data voltage is to be written is supplied; a WS signal gate driver that supplies the control signal; a plurality of data voltage lines for writing a data voltage; a data driver that supplies the data voltage; a selector circuit that switches a data voltage line to which the data voltage is supplied; a selector control line to which a control signal for controlling the selector circuit is supplied; and a controller that supplies the control signal. The plurality of pixels include a first pixel and a second pixel belonging to a same pixel row. The WS signal gate driver supplies the control signal in a first direction. The controller supplies the control signal in a second direction opposite to the first direction.

Abstract: A self-luminous display panel including light-emitting elements 100, column banks 122Y, and a light-shielding film 133. The light-emitting elements 100 correspond one-to-one with sub-pixels 100se, each sub-pixel 100se in a pixel emitting a different color of light. The column banks 122Y are disposed between the light-emitting elements 100 in a row direction, each having an elongated shape in a column direction. The light-shielding film 133 has openings 133a at positions corresponding to the light-emitting elements 100 in plan view, downstream in a light emission direction of the light-emitting elements 100. In plan view, distances in the row direction between edges of the openings 133a of the light-shielding film 133 and defined points of the light-emitting elements 100 are different depending on light emission color of the light-emitting elements 100, due to different widths of portions of the column banks 122Y adjacent to the light-emitting elements 100.

Abstract: A display unit which can realize reduction in thickness and weight of the display unit by omitting a void between a touch panel and a display panel, and its manufacturing method. Whole faces of the touch panel and the display panel are directly bonded together with an adhesive layer in between. The display panel has a structure wherein a driving substrate in which organic light emitting devices are formed and a sealing substrate are bonded together with an adhesive layer in between.

Abstract: A display device includes: a luminance converter which converts input gradation value into a corresponding target luminance value; a luminance correction calculator which calculates output gradation value from the target luminance value and calculates a corrected luminance value from the output gradation value, using an efficiency residual ratio which is an index representing the light-emitting element deterioration degree; a current stress calculator which converts current stress amount on the light-emitting element calculated from the corrected luminance value into current stress amount when reference current flows through the light-emitting element, and calculates the accumulated current stress amount; a temperature stress calculator which converts temperature stress amount on the light-emitting element under environmental temperature into temperature stress amount on the light-emitting element under reference temperature, and calculates the accumulated current stress amount; and an efficiency residual rat

Abstract: A display device includes a flexible substrate, a display device layer, a polarizing plate, and a warpage suppressing member. The flexible substrate has a front surface on a front surface side and a back surface on a back surface side. The display device layer is provided on the front surface side of the flexible substrate and includes a self-luminescent element. The polarizing plate is opposed to the flexible substrate across the display device layer and has a predetermined dimensional change characteristic corresponding to environmental change. The warpage suppressing member is provided on the back surface side of the flexible substrate and has a dimensional change characteristic of the same tendency as the dimensional change characteristic of the polarizing plate. The warpage suppressing member is configured to cancel at least a portion of warping stress of the polarizing plate to be applied to the flexible substrate.

Abstract: A display panel including a metal film, an adhesive layer disposed on the metal film, a first resin substrate disposed on the adhesive layer, light-emitting elements disposed above the first resin substrate, and a second resin substrate disposed above the light-emitting elements. The adhesive layer includes contact portions in contact with the metal film and gaps are present between the contact portions where the adhesive layer is not in contact with the metal film.

Abstract: A control method is provided for suppressing a flicker phenomenon even if frame periods vary in length. The control method controls an emission period and an extinction period of a frame period, which is a period in which one image continues to be displayed. When a signal indicating start of a frame period is detected, as the frame period, n subframe periods that configure the frame period, where n is an integer greater than or equal to 2, are sequentially started from the first subframe period, after a predetermined period of time has elapsed since the detection of the signal. All of the n subframe periods are controlled to have a substantially same length determined in advance and to have a substantially same ratio between the emission period and the extinction period, determined in advance, the ratio being referred to as a duty ratio.

Abstract: A self-luminous element includes: a pixel electrode; a light-emitting layer that is disposed above the pixel electrode and includes a light-emitting material; a first functional layer that is disposed on the light-emitting layer and includes a metal fluoride; a second functional layer that is disposed on the first functional layer and includes a first organic material having at least one of electron transport properties and electron injection properties; and a counter electrode that is disposed above the second functional layer. The second functional layer does not include at least one metallic element selected from the group consisting of alkali metals, alkaline earth metals, and rare earth metals that reduce the metal fluoride.

Abstract: An ink used in forming a functional layer of a self-luminous element by a printing method, the ink including a functional material and a mixed solvent. The mixed solvent includes solvents each having different vapor pressures. The functional material is dissolved or dispersed in the mixed solvent. A solvent that has a lowest vapor pressure among the solvents has a viscosity of at least 53 mPa·s, and a viscosity of the mixed solvent is 15 mPa·s or less.

Abstract: A display device includes: pixels arranged in a matrix; a plurality of write signal lines for selecting a pixel row to which a data voltage is to be written; a gate driver that supplies a gate signal; a plurality of data signal lines for writing the data voltage; a data driver that supplies the data voltage; a data selector circuit that supplies, per at least one data signal line by time division, the data voltage; and a controller. Each of the pixels includes a light-emitting element, a capacitor element, and a drive transistor that supplies a current in accordance with the voltage held by the capacitor element to the light-emitting element. The controller causes the gate driver and the data driver to perform an initialization operation on pixels in a second pixel row after a period during which a write operation is performed on pixels in a first pixel row.

Abstract: Disclosed herein is a display device including a plurality of light emitting portions arranged in a form of a matrix, a sealing layer disposed on the plurality of light emitting portions, a light shielding layer disposed in a gap between the light emitting portions adjacent to each other in a row direction on the sealing layer and extending in a column direction, a transparent partition wall layer disposed on the light shielding layer and extending in the column direction, and a color filter disposed in a gap in the light shielding layer and the transparent partition wall layer on the sealing layer.

Abstract: A display device includes: a display portion including a plurality of pixel circuits arranged in a matrix; and a gate driver that outputs one driving pulse for each horizontal cycle. The plurality of pixel circuits each include subpixel circuits each including a light emitting element, a driving transistor that supplies a current to the light emitting element, a write transistor, a reference transistor, and an initialization transistor. The one driving pulse is input per vertical cycle from the gate driver to the initialization transistor included in each of a plurality of rows in the plurality of pixel circuits, and the one driving pulse input to the initialization transistors included in mutually different rows among the plurality of rows is input to each of the write transistor and the reference transistor, the mutually different rows being other than a row in which the write transistor and the reference transistor are included.

Abstract: The optical communication system includes a transmitter including a display panel which has a curved surface and is capable of emitting light, and a transmission controller which causes the display panel to emit light representing an information signal; and a receiver including an image sensor which receives the light emitted from the display panel, and a reception controller which extracts the information signal from the light received by the image sensor. The display panel may be a transparent display panel which allows background light to pass through.

Abstract: A light-emitting element includes: a light-reflective first electrode; a light-emitting layer above the first electrode; a light-transmissive second electrode above the light-emitting layer; a first light-transmissive layer on the second electrode; and a second light-transmissive layer on the first layer. First optical cavity structure is formed between surface of the first electrode facing the light-emitting layer and surface of the second electrode facing the light-emitting layer. The first optical cavity structure corresponds to, as peak wavelength, first wavelength longer than peak wavelength of light emitted from the light-emitting layer. Second optical cavity structure is formed between the surface of the first electrode facing the light-emitting layer and an interface between the first layer and the second layer. The second optical cavity structure corresponds to, as peak wavelength, second wavelength shorter than the first wavelength.