Abstract: An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer, the emission layer comprises a thermally activated delayed fluorescence emitter and a host, the emission layer does not comprise a phosphorescence emitter, and the thermally activated delayed fluorescence emitter comprises a compound represented by Formula 1:

Abstract: An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an emission layer between the first electrode and the second electrode, wherein the emission layer comprises a host and a thermally activated delayed fluorescence emitter, the host comprises a first material and a second material, the first material and the second material are different from each other, the second material has a dipole moment of about 5.5 debye or more, the second material does not comprise a group represented by *=o, and * indicates a binding site to a neighboring atom.

Abstract: The present invention relates to a head-mounted display (HMD) device capable of providing content to a user while being worn on the user's head, and provides an HMD device comprising: a body part including a power supply unit for supplying power; a fixing frame mounted on the body part and including a guide member formed adjacent to the body part; a movable member mounted on the fixing frame so as to be movable along the guide member; a length adjustment part mounted on the movable member and including an SMA spring part, which contracts by means of a current applied from the power supply unit so as to move the movable member; and a headband part mounted on the movable member, and moved by the movement of the movable member so as to be suitable for the head size of a human body, wherein the SMA spring part includes a first spring part connected to a first region of the fixing frame adjacent to the guide member, and a second spring part connected to a second region of the fixing frame spaced apart from the fir

Abstract: An organic light-emitting device which including a first electrode, a second electrode facing the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein an emission layer includes a first material, a second material, and a third material satisfying certain conditions.

Abstract: An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer and an electron transport layer disposed between the emission layer and the second electrode, the electron transport layer comprises a first electron transport layer disposed between the emission layer and the second electrode and a second electron transport layer disposed between the first electron transport layer and the second electrode, the first electron transport layer comprises a first metal-free compound, the second electron transport layer comprises a second metal-free compound, the first metal-free compound and the second metal-free compound are different from each other, and the second metal-free compound is represented by Formula 2 as provided herein.

Abstract: A flexible display unit is disclosed including a flexible display, and a flexible frame coupled to the flexible display, the flexible frame including a first rigid portion, a second rigid portion, and a flexible portion located between the first and second rigid portions and configured to permit the frame to be bent, the flexible portion including a first region including a first plurality of holes having a first size, and a second region including a second plurality of holes having a second size, wherein the first size is greater than the second size, the first region is positioned closer to a center axis of the flexible frame than the second region, and an area of the first plurality of holes within a portion of the first region is greater than an area of the second plurality of holes within a portion of the second region having the same area.

Abstract: A flexible frame for an electronic device is disclosed, the frame including a flexible portion located between a first rigid portion and a second rigid portion and configured to permit the frame to be bent, wherein the flexible portion includes a first region including a first plurality of holes having a first size, and a second region including a second plurality of holes having a second size, wherein the first size is greater than the second size, the first region is positioned closer to a center axis of the flexible frame than the second region, and an area of the first plurality of holes within a portion of the first region having a particular area is greater than an area of the second plurality of holes within a portion of the second region having the same particular area.

Abstract: An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an emission layer disposed between the first electrode and the second electrode, wherein the emission layer includes a first material not including an electron transport moiety, a second material including at least one electron transport moiety, a third material having reorganization energy of about 0.4 eV or more, and a light-emitting material, wherein the first material, the second material, the third material, and the light-emitting material are different from one another, and wherein a ratio of a light-emitting component emitted from the light-emitting material to a total of light-emitting components emitted from the emission layer is about 90% or more.

Abstract: An organic light-emitting device includes a first electrode layer; a hole injection layer on the first electrode layer; a hole transport layer on the hole injection layer; an electron blocking layer on the hole transport layer, and including a plurality of layers; a light-emitting layer on the electron blocking layer; an electron transport layer on the light-emitting layer; an electron injection layer on the electron transport layer; and a second electrode layer on the electron transport layer, wherein the electron blocking layer has a highest occupied molecular orbital value which is lower than a highest occupied molecular orbital value of the hole transport layer, and the light-emitting layer has a HOMO value which is lower than a highest occupied molecular orbital value of the electron blocking layer.

Abstract: A flexible frame for an electronic device is disclosed, the frame including a flexible portion located between a first rigid portion and a second rigid portion and configured to permit the frame to be bent, wherein the flexible portion includes a first region including a first plurality of holes having a first size, and a second region including a second plurality of holes having a second size, wherein the first size is greater than the second size, the first region is positioned closer to a center axis of the flexible frame than the second region, and an area of the first plurality of holes within a portion of the first region having a particular area is greater than an area of the second plurality of holes within a portion of the second region having the same particular area.

Abstract: A flexible display unit is disclosed including a flexible display, and a flexible frame coupled to the flexible display, the flexible frame including a first rigid portion, a second rigid portion, and a flexible portion located between the first and second rigid portions and configured to permit the frame to be bent, the flexible portion including a first region including a first plurality of holes having a first size, and a second region including a second plurality of holes having a second size, wherein the first size is greater than the second size, the first region is positioned closer to a center axis of the flexible frame than the second region, and an area of the first plurality of holes within a portion of the first region is greater than an area of the second plurality of holes within a portion of the second region having the same area.

Abstract: An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer and a fluorescent compound, wherein the fluorescent compound comprises a 3n-?*-to-1?-?* energy transition from a 3n-?* excited state to a 1?-?* excited state, an energy level in a 1n-?* excited state of the fluorescent compound is greater than an energy level in the 1?-?* excited state of the fluorescent compound, the fluorescent compound emits a fluorescent light by radiative energy transition of an exciton in the 1?-?* excited state to a ground state, and the energy level in the 1n-?* excited state, the energy level in the 1?-?* excited state, and the energy level in the 3n-?* excited state are each independently calculated by using a time dependent-Density Functional Theory method.

Abstract: An organometallic compound represented by Formula 1, wherein the organometallic compound has a horizontal orientation ratio of a transition dipole moment in a range of about 85 percent to about 100 percent: M(L1)n??Formula 1 wherein, in Formula 1, M is selected from a first-row transition metal of the Periodic Table of Elements, a second-row transition metal of the Periodic Table of Elements, and a third-row transition metal of the Periodic Table of Elements, n is 2 or 3, L1 is a bidentate organic ligand bound to M, wherein L1 does not comprise a fluoro group (—F), and wherein L1 groups in the number of n are identical to each other.

Abstract: An organometallic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, wherein the emission layer includes a thermally activated delayed fluorescence (TADF) emitter and a host and the TADF emitter is different from the host, and wherein the TDAF emitter is capable of satisfying certain conditions disclosed in the specification.

Abstract: An organometallic compound represented by Formula 1: wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: An organic light-emitting device includes a first electrode layer; a hole injection layer on the first electrode layer; a hole transport layer on the hole injection layer; an electron blocking layer on the hole transport layer, and including a plurality of layers; a light-emitting layer on the electron blocking layer; an electron transport layer on the light-emitting layer; an electron injection layer on the electron transport layer; and a second electrode layer on the electron transport layer, wherein the electron blocking layer has a highest occupied molecular orbital value which is lower than a highest occupied molecular orbital value of the hole transport layer, and the light-emitting layer has a HOMO value which is lower than a highest occupied molecular orbital value of the electron blocking layer.

Abstract: A condensed cyclic compound represented by Formula 1: Ar1-(L1)a1-B-(L2)a2-Ar2??Formula 1 wherein, in Formula 1, groups and variables are the same as described in the specification.

Abstract: Methods for calculating a MetaKG signal are provided. The method including illuminating a region of interest in a sample with a near-infrared (NIR) light source and/or a visible light source; acquiring images of the region of interest; processing the acquired images to obtain metadata associated with the acquired images; and calculating the MetaKG signal from the metadata associated with the acquired images. Related systems and computer program products are also provided.

Abstract: An organic light-emitting device including a first electrode; a second electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer comprises an emission layer, and wherein the organic layer comprises a first compound represented by Formula 1 and a second compound having the lowest excited triplet energy level greater than 2.73 electron volts: wherein in Formula 1, R11 to R33 are the same as described in the specification.