Abstract: The present invention relates to novel compounds having a histone deacetylase 6 (HDAC6) inhibitory activity, optical isomers thereof or pharmaceutically acceptable salts thereof, a pharmaceutical use thereof, and a method for preparing the same. According to the present invention, the novel compounds, optical isomers thereof or pharmaceutically acceptable salts thereof have the histone deacetylase 6 (HDAC6) inhibitory activity, and are effective in preventing or treating HDAC6-related diseases, comprising infectious diseases; neoplasm; internal secretion; nutritional and metabolic diseases; mental and behavioral disorders; neurological diseases; eye and ocular adnexal diseases; circulatory diseases; respiratory diseases; digestive diseases; skin and subcutaneous tissue diseases; musculoskeletal system and connective tissue diseases; and teratosis or deformities, and chromosomal aberration.

Abstract: Provided is a display device. The display device includes a first base portion, a second base portion facing the first base portion, a light emitting layer disposed on one surface of the first base portion and emitting first light, a first wavelength conversion pattern disposed on the light emitting layer and converting the first light into second light having a different wavelength from the first light, a first color filter overlapping the first wavelength conversion pattern on one surface of the second base portion and spaced apart from the first wavelength conversion pattern, and an air layer interposed between the first wavelength conversion pattern and the first color filter.

Abstract: A heat exchanger assembling apparatus includes a tube loading device for loading tubes of a heat exchanger, in an aligned state, in a tray having partitions at intervals, a fin supply device for supplying fins supplied through a chute to spaces between the partitions for the tubes in the tray, by transferring the tray at intervals, a support supply device for supplying erected supports to spaces between the partitions at the outermost side in the tray, a vision inspector for inspecting whether the fins, the tubes, and the supports are appropriately arranged in the tray without any missing part spaces, a discharging device for discharging the fins, the tubes and the supports from the tray to a table and aligning the fins, the tubes, and the supports with respect to a width direction and a lengthwise direction, a transfer device for gripping the fins, the tubes, and the supports and transferring the fins, the tubes, and the supports to a header assembly table, and a header assembling device.