Abstract: Provided are perovskite quantum dots showing an independent photoreaction to light stimulation in different wavelength bands from each other, a method for preparing the perovskite quantum dots, and an anti-counterfeiting ink including the perovskite quantum dots.

Abstract: A wearable electronic device includes an adjustment structure configured to adjust a distance between a first lens and a second lens. A user may wear the wearable electronic device and adjust an inter-lense distance so that there is a good match with the positions of their own eyes. The adjustment structure may include a lever, a first adjustment gear configured to be engaged with a first gear in a first position of the lever, a second adjustment gear configured to be engaged with the first gear and a second gear in a second position of the lever, and a third adjustment gear configured to be engaged with the second gear in a third position of the lever. The user may move the lever in or out to engage a different gear and then rotate the lever to adjust the inter-lense distance.

Abstract: An electronic device includes a first camera module; a display for displaying an augmented reality content; a processor operatively connected to the first camera module and the display; and a memory operatively connected to the at least one processor and storing instructions and dominant eye correction information. The processor performs a dominant eye determination operation of a user of the electronic device identifying a first position of a first object during the dominant eye determination operation; identifies a second position of the first object by using the first camera module; recognizes, as a selected point, a point moved, by a first correction value determined on the basis of the dominant eye correction information, from a first reference point displayed on the augmented reality content during the dominant determination operation; and selects a second object on the augmented reality content corresponding to the selected point.

Abstract: A wearable electronic device is provided. The wearable electronic device includes a lens frame configured to accommodate a display member and including a first end and a second end opposite to the first end, a hinge structure including first and second hinge structures connected respectively to the first and second ends, a wearing member including a first and second wearing members connected respectively to the first hinge and second hinge structures, the first wearing member or the second wearing member being configured to move with respect to the lens frame, a battery disposed in the first wearing member, a circuit board disposed in the first wearing member and including electrodes, and a charging terminal structure disposed in the first wearing member and including charging pads exposable to an outside and a connecting member disposed in the first wearing member and configured to electrically connect the charging pads and the electrodes.

Abstract: An electronic device according to an embodiment includes: an ultra-wide band (UWB) communication module including a plurality of antennas, and a processor operatively connected to the UWB communication module, wherein the processor is configured to: measure a first coordinate of a first external device and a second coordinate of a second external device generated based on signals received from the first external device and the second external device using the plurality of antennas, generate a first coordinate system based on the electronic device corresponding to the measured first coordinate and second coordinate, and regenerate a second coordinate system through reconfiguration of the first coordinate system based on the first external device.

Abstract: A method and an apparatus for displaying a keypad on a touch screen are provided. The apparatus includes an Organic Light Emitting Diode (OLED). The method includes arranging at least one keypad block including at least one area, determining at least one light-emitting area among the areas, and displaying the at least one keypad block by emitting light in the OLED corresponding to the at least one light-emitting area.

Abstract: A method and an apparatus for displaying a keypad on a touch screen are provided. The apparatus includes an Organic Light Emitting Diode (OLED). The method includes arranging at least one keypad block including at least one area, determining at least one light-emitting area among the areas, and displaying the at least one keypad block by emitting light in the OLED corresponding to the at least one light-emitting area.