Abstract: A display device includes a light-emitting element, a driving element to apply a driving current, a 1-1 switching element including a first electrode connected to a gate electrode of the driving element, a gate electrode, and a second electrode connected to a first intermediate node, a 1-2 switching element including a first electrode connected to the first intermediate node, a gate electrode, and a second electrode connected to a second electrode of the driving element, a 2-1 switching element including a first electrode connected to a second intermediate node, a gate electrode, and a second electrode connected to the gate electrode of the driving element, a 2-2 switching element including a first electrode, a gate electrode, and a second electrode connected to the second intermediate node, and a capacitor including a first electrode to receive a power voltage, and a second electrode connected to the first and second intermediate nodes.

Abstract: Provided is a center bracket for fixing a fire sprinkler and, more particularly, to a sprinkler center bracket having a one-touch-type structure, to which a locker for preventing loosening of a cam lever is coupled. When a locker protrusion is inserted into a locker protrusion hook groove formed in one end portion of a cam protrusion contact portion, wherein the locker protrusion is rotated about a fixing tool of the locker for preventing loosening of the cam lever as a central axis of rotation, the cam lever is rotated in a locking direction in order to fix the sprinkler, and after this, loosening of the cam protrusion contact portion in a direction opposite to the locking direction can be prevented, the cam protrusion contact portion being fixed by an elastic spring hinge pin after the cam lever is rotated in the locking direction to fix the sprinkler.

Abstract: Provided is a center bracket for fixing a fire sprinkler and, more particularly, to a sprinkler center bracket having a one-touch-type structure, to which a locker for preventing loosening of a cam lever is coupled. When a locker protrusion is inserted into a locker protrusion hook groove formed in one end portion of a cam protrusion contact portion, wherein the locker protrusion is rotated about a fixing tool of the locker for preventing loosening of the cam lever as a central axis of rotation, the cam lever is rotated in a locking direction in order to fix the sprinkler, and after this, loosening of the cam protrusion contact portion in a direction opposite to the locking direction can be prevented, the cam protrusion contact portion being fixed by an elastic spring hinge pin after the cam lever is rotated in the locking direction to fix the sprinkler.

Abstract: Disclosed is a set type fire-fighting sprinkler installing device, which installs a fire-fighting sprinkler through frames connectively installed on a ceiling lengthwise and crosswise, and includes a supporter (100) having a designated length to traverse frames (10) installed at right and left sides thereof; supporter clamps (200) respectively connected to both ends of the supporter (100) to adjust the interval therebetween and fixed to the upper ends of the frames (10); and a sprinkler clamp (300) connected to the middle portion of the supporter (100) to connect a sprinkler (20) in front thereof while fixing the supporter (100) under the condition that the right and left end positions of the supporter (100) are adjusted. Thereby, the device simply variably installs the sprinkler (20) according to the interval between the frames (10) and the position of the sprinkler (20).