Abstract: A comment management method manages a plurality of comments written about content and selects at least one first comment from among the plurality of comments based on a first condition that is based on feedback from users for each of the plurality of comments, selects a second comment based on the feedback and a second condition that is based on the time at which a comment is written, and distinguishably displays the first comment and the second comment on a user terminal that displays the content.

Abstract: An organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and a first emitting part including a first emitting material layer and positioned between the first and second electrodes, wherein the first emitting material layer includes a first p-type host and a first n-type host, and wherein the first p-type host is represented by Formula 1, and the first n-type host is represented by Formula 3.

Abstract: An organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and a first emitting part including a first blue emitting material layer and positioned between the first and second electrodes, the first blue emitting material layer including a first blue emitting layer and a second blue emitting layer, wherein the first blue emitting layer includes a first p-type host and a first n-type host, and the second blue emitting layer includes a second p-type host and a second n-type host, wherein one of the first p-type host and the second p-type host is a first compound represented by one of Formula 1a and Formula 1b, and wherein the other one of the first p-type host and the second p-type host is a second compound represented by one of Formula 3a and Formula 3b.

Abstract: The present disclosure relates to an organic light emitting diode and an organic light emitting device including the same. The organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and a first blue emitting material layer including a first compound and a second compound and positioned between the first and second electrodes, wherein the first compound is represented by Formula 1, and the second compound is represented by Formula 3. According to an aspect of the present disclosure, it is allowed to provide an OLED and an organic light emitting device having high emitting efficiency and/or improved lifespan.

Abstract: Disclosed are an organic light emitting device and a display device using the same in which a light emitting layer includes a host and a plurality of dopants. In the light emitting layer, energy is transferred from a host and other dopants to one dopant by energy transfer system, thus it is possible to increase luminous efficacy of a single color and to increase lifetime of emission.

Abstract: Disclosed are an organic light emitting device and a display device using the same in which a light emitting layer includes a host and a plurality of dopants. In the light emitting layer, energy is transferred from a host and other dopants to one dopant by energy transfer system, thus it is possible to increase luminous efficacy of a single color and to increase lifetime of emission.

Abstract: Disclosed is a display panel configured such that, in a structure in which the distance between a display surface and a viewer is short, the structure between a reflective plate and a first electrode (an anode) is changed such that light having three or more color peak properties for all subpixels is transmitted through a second electrode (a cathode), whereby white expression as well as color expression is possible, and a head mounted display device including the same.

Abstract: An organic light emitting diode can include a reflective electrode, a transparent electrode facing the reflective electrode, a first emitting part including a first emitting material layer, and a second emitting part including a second emitting material layer. The first emitting material layer can be a fluorescent emitting layer comprising a fourth compound as a fluorescent dopant. The second emitting material layer can be a phosphorescent emitting layer comprising a first compound as a phosphorescent dopant. Preferably, a ratio of a second emission peak intensity of the phosphorescent dopant to the first emission peak intensity of the phosphorescent dopant in the second emitting material layer is 0.5 or less. An organic light emitting device can include the organic light emitting diode and can be used in a display device or a lighting device.

Abstract: An organic light emitting diode includes a first electrode; a second electrode facing the first electrode; and a first emitting material layer including a first compound, a second compound and a third compound and positioned between the first and second electrodes, wherein an onset wavelength of the second compound is greater than an onset wavelength of the first compound and is smaller than an onset wavelength of the third compound, wherein a maximum emission wavelength of the second compound is smaller than a maximum emission wavelength of the first compound, and a maximum emission wavelength of the third compound is equal to or smaller than a maximum emission wavelength of the first compound, and wherein a full width at half maximum of each of the second and third compounds is smaller than a full width at half maximum of the first compound.

Abstract: Disclosed are an organic light emitting device and a display device using the same in which a light emitting layer includes a host and a plurality of dopants. In the light emitting layer, energy is transferred from a host and other dopants to one dopant by energy transfer system, thus it is possible to increase luminous efficacy of a single color and to increase lifetime of emission.

Abstract: Disclosed is a display panel configured such that, in a structure in which the distance between a display surface and a viewer is short, the structure between a reflective plate and a first electrode (an anode) is changed such that light having three or more color peak properties for all subpixels is transmitted through a second electrode (a cathode), whereby white expression as well as color expression is possible, and a head mounted display device including the same.

Abstract: Apparatuses for camera calibration using a light source are provided, one of apparatus comprises, a n-light sources (n is 3 or more) which can be mounted on the camera, an actual coordinate computation processing unit which irradiates light to an image pickup surface being captured by the camera through the n-light sources to capture an image of an n-sided polygon made up of n-light spots formed on the image pickup surface, and analyses a degree of distortion on the n-sided screen to obtain n or more coordinate pairs obtained by matching the coordinates on the screen and the coordinates on an actual space and a calibration computation processing unit which receives the n or more coordinate pairs as input to convert a two-dimensional coordinate on the screen into a three-dimensional coordinate on the actual space.