Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure, an organic electroluminescent device having long lifespan properties could be prepared, and by comprising a plurality of host materials according to the present disclosure, an organic electroluminescent device having long lifespan properties could be prepared.

Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: The present disclosure relates to an organic electroluminescent compound, a plurality of host materials, and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound according to the present disclosure or by comprising a specific combination of compounds according to the present disclosure as a plurality of host materials, it is possible to produce an organic electroluminescent device having improved luminous efficiency, and/or lifetime properties compared to the conventional organic electroluminescent devices.

Abstract: The present disclosure relates to a plurality of host materials comprising at least one first host compound and at least one second host compound and an organic electroluminescent device comprising the same. By comprising the specific combination of the compound according to the present disclosure as host materials, an organic electroluminescent device having low driving voltage, high luminous efficiency and long lifespan characteristics can be provided.

Abstract: The present disclosure relates to a plurality of host materials comprising a first host compound represented by formula 1 and a second host compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the specific combination of the compound according to the present disclosure as host materials, an organic electroluminescent device having low driving voltage and/or high luminous efficiency and/or significantly improved lifespan characteristics can be provided.

Abstract: A ring with a rotation and a lock function to display multiple anniversaries, the ring comprising: a main ring including engagement areas and distant areas between the engagement areas; a sub ring rotatably engaged with the main ring, and engagement members positioned between the main ring and the sub ring, wherein the subring includes a receiver receiving the engagement member and including a first to fourth side with an opening area; wherein a length of the opening area is shorter than that of the first side; wherein the engagement member is made of elastic materials and positioned in the receiver; wherein when the opening area is aligned with the engagement groove area, the engagement member is protruded from the receiver and engaged with the engagement groove; wherein when the opening area is aligned with the distant area, the engagement member is inserted in the receiver.

Abstract: A ring with a rotation and a lock function to selectively display multiple jewels is configured to comprise a first side including a first hole; a second side positioned in an opposite side to the first side and including a second hole that is smaller than the first hole; a third side bended from the first side; a fourth side bended from the first side and positioned in an opposite side to the third side; a space formed between the first and the second side; a plurality of receivers positioned in the space and meeting with the second side; elastic members respectively positioned in the plurality of receiver, and jewels respectively sitting on the elastic members, wherein the second side and the plurality of the receivers are rotatable in a state that the first, the third, and the fourth side are fixed.

Abstract: The present disclosure relates to a plurality of host materials comprising at least one first host compound represented by formula 1 and at least one second host compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds according to the present disclosure as a host material, an organic electroluminescent device having significantly improved lifespan characteristics can be provided.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent device having improved driving voltage and/or current efficiency characteristics can be provided by comprising the organic electroluminescent compound according to the present disclosure.

Abstract: The present application can provide a battery module, a method for manufacturing method the same and a thermally conductive material applied to the manufacturing method. The present application can provide a battery module having excellent output relative to volume and heat dissipation characteristics, with being manufactured in a simple process and at a low cost, a method for manufacturing the same, and a thermally conductive material applied to the manufacturing method.

Abstract: The present application can provide a battery module, a manufacturing method thereof, and a resin composition applied to the manufacturing method. The present application can provide a battery module having excellent power relative to volume, while being manufactured in a simple process and at a low cost, a manufacturing method thereof, and a resin composition applied to the manufacturing method.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. By comprising the organic electroluminescent compound of the present disclosure, it is possible to provide an organic electroluminescent device having excellent thermal stability, low driving voltage, high luminous efficiency, and/or improved lifespan properties.

Abstract: A ring with a rotation and a lock function to selectively display multiple jewels is configured to comprise a first side including a first hole; a second side positioned in an opposite side to the first side and including a second hole that is smaller than the first hole; a third side bended from the first side; a fourth side bended from the first side and positioned in an opposite side to the third side; a space formed between the first and the second side; a plurality of receivers positioned in the space and meeting with the second side; elastic members respectively positioned in the plurality of receiver, and jewels respectively sitting on the elastic members, wherein the second side and the plurality of the receivers are rotatable in a state that the first, the third, and the fourth side are fixed.

Abstract: A ring with a rotation and a lock function to display multiple anniversaries, the ring comprising: a main ring including engagement areas and distant areas between the engagement areas; a sub ring rotatably engaged with the main ring, and engagement members positioned between the main ring and the sub ring, wherein the subring includes a receiver receiving the engagement member and including a first to fourth side with an opening area; wherein a length of the opening area is shorter than that of the first side; wherein the engagement member is made of elastic materials and positioned in the receiver; wherein when the opening area is aligned with the engagement groove area, the engagement member is protruded from the receiver and engaged with the engagement groove; wherein when the opening area is aligned with the distant area, the engagement member is inserted in the receiver.

Abstract: An excavator having a rotatable arm is disclosed. The excavator includes: a vehicle body configured to have a hydraulic pump; a boom connected to the vehicle body at one end thereof; a boom cylinder coupled between the vehicle body and the boom, and configured to receive hydraulic energy from the hydraulic pump and operate the boom; an arm connected to the other end of the boom; an arm cylinder coupled between the boom and the arm, and configured to receive hydraulic energy from the hydraulic pump and operate the arm; a bucket connected to an end of the arm; and a bucket cylinder coupled between the arm and the bucket, and configured to receive hydraulic energy from the hydraulic pump and operate the bucket. The arm includes: a first body, a second body, and a rotation module configured to enable the rotational movement of the second body.

Abstract: The present application can provide a battery module, a method for manufacturing method the same and a thermally conductive material applied to the manufacturing method. The present application can provide a battery module having excellent output relative to volume and heat dissipation characteristics, with being manufactured in a simple process and at a low cost, a method for manufacturing the same, and a thermally conductive material applied to the manufacturing method.

Abstract: The present application can provide a battery module, a manufacturing method thereof, and a resin composition applied to the manufacturing method. The present application can provide a battery module having excellent power relative to volume, while being manufactured in a simple process and at a low cost, a manufacturing method thereof, and a resin composition applied to the manufacturing method.

Abstract: The present disclosure relates to an organic electroluminescent compound and an organic electroluminescent device comprising the same. The organic electroluminescent device having improved driving voltage and/or current efficiency characteristics can be provided by comprising the organic electroluminescent compound according to the present disclosure.

Abstract: Disclosed are a light guide plate having an engraved pattern and a backlight unit having the same and a display device having the same, wherein the engraved pattern is configured such that a light incident surface thereof has an arc shape on a plane and a vertical section taken along a straight line passing through a center of the light incident surface is triangular. This makes it possible to maximize total reflection efficiency to increase luminous intensity of light output, resulting in improved light use efficiency and enhanced brightness of the backlight unit.

Abstract: The present application can provide a battery module, a method for manufacturing method the same and a thermally conductive material applied to the manufacturing method. The present application can provide a battery module having excellent output relative to volume and heat dissipation characteristics, with being manufactured in a simple process and at a low cost, a method for manufacturing the same, and a thermally conductive material applied to the manufacturing method.