Abstract: A display panel can include a substrate, a light-emitting element including an emission region on the substrate, a reference voltage line adjacent to the light-emitting element, and a branch line connected to the reference voltage line to apply a reference voltage to light-emitting element. The light-emitting element can emit light on the emission region in a direction of the substrate. Further, the branch line can include a semiconductor layer, and the semiconductor layer of the branch line can overlap the emission region.

Abstract: The present disclosure provides a target for aerial survey transformable to hand-fan shape. In this instance, the target includes a central axis, a first identification marker with one end connected to the central axis and having a first length outwards, and a second identification marker with one end connected to the central axis and having a second length outwards, the second identification marker disposed on the first identification marker, wherein the second length is shorter than the first length, the first identification marker includes a plurality of first unit areas having a predetermined angle therebetween with respect to the central axis, and the plurality of first unit areas has an overlap between adjacent first unit areas.

Abstract: The present invention relates to a polyester resin for an adhesive strength-improved binder and a polyester fiber using the same, in which adhesive properties of the polyester resin for the adhesive strength-improved binder are not lowered at high temperatures since melt viscosity even at high temperatures of the polyester resin for the adhesive strength-improved binder, as a polyester resin for a binder, the polyester resin including terephthalic acid or an ester-forming derivative thereof as an acid component and including 2-methyl-1,3-propanediol, 2-methyl-1,3-pentanediol, and ethylene glycol as diol components, is not greatly lowered.

Abstract: A method for preparing a thermal adhesive copolymerized polyester resin is disclosed. The method includes: a transesterification reaction in a reaction mixture of a diol compound according to Formula 1, for example, 2-Methyl-1,3-propanediol, an isophthalic acid (IPA) or an IPA derivative as an acid component, and polyethylene terephthalate; and a condensation polymerization reaction of the reaction mixture to prepare a copolymerized polyester resin. The copolymerized polyester resin has an intrinsic viscosity (I.V.) of 0.5 dL/g to 0.75 dL/g, a softening point (Ts) of 100° C. to 160° C., and a glass transition temperature (Tg) of 60° C. to 70° C. The copolymerized polyester resin can be effectively used in fields of clothing, automobile parts, as a thermal adhesive fiber. wherein R1 is an alkyl group having 1 to 4 carbon atoms, a and b are each independently an integer ranging from 0 to 3, and each solid line represents a single bond when a and b is 0.

Abstract: Provided are an automobile interior/exterior material including a low-melting-point polyester resin fiber layer, and a method of manufacturing the same. More particularly, an automobile interior/exterior material having excellent processability and price competitiveness without deterioration of properties, such as strength and durability, is provided.

Abstract: A sound-absorbing air duct for a vehicle includes a lower non-woven fabric and an upper non-woven fabric sandwiching wires therebetween; and a film made of a polyester resin having a low melting point and disposed on the upper non-woven fabric, wherein each of the lower and upper non-woven fabrics includes a mixture between a first polyester fiber containing a polyester resin having a melting point higher than 250° C. and a second polyester fiber containing a polyester resin having a low melting point and having a softening point of 100° C. to 150° C., wherein the second polyester fiber includes a polyester resin having a low melting point composed of: an acid component including terephthalic acid or an ester-forming derivative thereof; and a diol component including 2-methyl-1,3-propanediol, 2-methyl-1,3-pentanediol, and ethylene glycol.

Abstract: Provided are an automobile interior/exterior material including a low-melting-point polyester resin fiber layer, and a method of manufacturing the same. More particularly, an automobile interior/exterior material having excellent processability and price competitiveness without deterioration of properties, such as strength and durability, is provided.

Abstract: The present disclosure relates to a low-melting conjugate fiber prepared by complex radiation of: a general polyester as a core component; and a copolymer polyester resin for a low-melting binder prepared by copolymerizing an acid component composed of terephthalic acid and isophthalic acid or an ester-forming derivative thereof as a sheath component and a diol component composed of 2-methyl-1,3-propanediol, diethylene glycol, and ethylene glycol.

Abstract: An automatic rear wheel self-centering device for four-wheel steering vehicles automatically performs the rear wheel self-centering operation when the steering mode of the vehicle returns from another steering mode to the standard steering mode. The device has a branch conduit branched from a conduit leading from the steering unit to the steering mode selection valve. A conduit control valve is mounted to the branch conduit and is changeable between a neutral position blocking the branch conduit, a first position connecting the branch conduit to one side chamber of the rear wheel steering cylinder and a second position connecting the branch conduit to the other side chamber of the cylinder. The spool of the conduit control valve moves synchronous with a linear movement of the piston of the rear wheel steering cylinder, thereby changing the position of the conduit control valve between the above three positions.

Abstract: A transmission for a heavy construction equipment such as a wheel type excavator adopting the hydrostatic drive system for transmitting travelling power. The transmission applied to a heavy construction equipment having an upper turning body, a lower travelling body and a turning joint for coupling the upper turning body to the lower travelling body so as to turn the upper turning body with respect to the lower travelling body and having a gear box disposed in the lower travelling body and provided with clutches for at least two speed change stages, and a control unit disposed in the upper turning body, a charging pump disposed in the upper turning body, a power shift motor disposed in the lower travelling body and adapted to be actuated by an oil fed from the charging pump, and a power shift pump disposed in the lower travelling body and adapted to be actuated by the power shift motor, with the gear box performing a speed change operation by oil fed from the power shift pump.