Abstract: Disclosed is a flexible display apparatus in which torsion prevention lines are disposed so as to prevent cracks and to detect fine cracks. The flexible display apparatus includes a flexible substrate including an active area and an inactive area, the inactive area including a first inactive area, a second inactive area provided with a circuit board disposed therein, and a bending area located between the first inactive area and the second inactive area, and torsion prevention lines disposed in a direction vertical to a length direction of the flexible substrate, in a region of the bending area of the flexible substrate, adjacent to the first inactive area, and fine crack detection lines disposed in parallel between a plurality of signal lines formed in the length direction of the flexible substrate, in the region of the bending area of the flexible substrate, adjacent to the first inactive area.

Abstract: Disclosed is a flexible display apparatus in which torsion prevention lines are disposed so as to prevent cracks and to detect fine cracks. The flexible display apparatus includes a flexible substrate including an active area and an inactive area, the inactive area including a first inactive area, a second inactive area provided with a circuit board disposed therein, and a bending area located between the first inactive area and the second inactive area, and torsion prevention lines disposed in a direction vertical to a length direction of the flexible substrate, in a region of the bending area of the flexible substrate, adjacent to the first inactive area, and fine crack detection lines disposed in parallel between a plurality of signal lines formed in the length direction of the flexible substrate, in the region of the bending area of the flexible substrate, adjacent to the first inactive area.

Abstract: Disclosed is a process for the regioselective preparation of glycerol derivative in a high efficiency and yield. The process for the regioselective preparation of 1-R1-2-R2-3-acetyl-glycerol derivative comprises the steps of: obtaining 1-R1-3-protecting group-glycerol by introducing a protecting group to 3-position of 1-R1-glycerol; obtaining 1-R1-2-R2-3-protecting group-glycerol by introducing R2 group into 2-position of 1-R1-3-protecting group-glycerol; and carrying out the deprotection reaction and the acetylation reaction of 1-R1-2-R2-3-protecting group-glycerol at the same time. Wherein, R1 and R2 are fatty acid groups having 16 to 22 carbon atoms, and are different from each other; and the protecting group is trityl group or trialkylsilyl group.

Abstract: Disclosed is a process for the regioselective preparation of glycerol derivative in a high efficiency and yield. The process for the regioselective preparation of 1-R1-2-R2-3-acetyl-glycerol derivative comprises the steps of: obtaining 1-R1-3-protecting group-glycerol by introducing a protecting group to 3-position of 1-R1-glycerol; obtaining 1-R1-2-R2-3-protecting group-glycerol by introducing R2 group into 2-position of 1-R1-3-protecting group-glycerol; and carrying out the deprotection reaction and the acetylation reaction of 1-R1-2-R2-3-protecting group-glycerol at the same time. Wherein, R1 and R2 are fatty acid groups having 16 to 22 carbon atoms, and are different from each other; and the protecting group is trityl group or trialkylsilyl group.