Infolding-type hinge structure having flexible display panel installed thereon

1. An in-folding type hinge structure having a flexible display panel installed thereon, the in-folding type hinge structure comprising:

a pair of main panels ( 10 ) and a pair of auxiliary panels ( 12 ) that have the flexible display panel installed thereon and that are provided on right and left sides of a central joint ( 80 );

a folding hinge unit ( 20 ) that is attached to rear surfaces of the main panels ( 10 ) and the auxiliary panels ( 12 );

a folding hinge unit cover ( 70 ) that is provided on the rear surfaces of the main panels ( 10 ) and the auxiliary panels ( 12 ) to cover a bottom of the folding hinge unit ( 20 ); and

a case ( 26 ) that is attached to the rear surfaces of the main panels ( 10 ) and the auxiliary panels ( 12 ),

wherein the folding hinge unit ( 20 ) includes two pairs of folding units ( 21 ) that are provided on the right and left sides of the central joint ( 80 ),

wherein each folding unit ( 21 ) includes a mechanism that controls rotation of the auxiliary panels ( 12 ) and a mechanism that controls rotation of main panels ( 10 ),

wherein the mechanism that controls the rotation of the auxiliary panels ( 12 ) includes a rotation support ( 32 ) that is inserted into a rotation shaft portion ( 60 ) of the central joint and an inside support of which a rotation guide groove ( 23 ) is inserted into a rotation guide rail ( 33 ) protruding from a side surface of the rotation support ( 32 ) and that slides rotationally, and the rotation guide groove ( 23 ) of which movement is guided along a guide protrusion ( 52 ) is formed in the inside support ( 22 ),

wherein the inside support ( 22 ) is coupled to an auxiliary panel fixing plate ( 30 ) to which the auxiliary panels ( 12 ) are fixed,

wherein the mechanism that controls the rotation of the main panels ( 10 ) includes a pair of connection supports ( 46 ) that is provided in the auxiliary panel fixing plate ( 30 ) to rotate while changing its height and a main panel fixing plate ( 40 ) that is provided such that the connection supports ( 46 ) rotate while changing its height,

wherein the main panel fixing plate ( 40 ) is fixed to the rear surface of the main panel ( 10 ),

wherein the inside support ( 22 ) is attached to the rotation support ( 32 ) and moves rotationally along the rotation guide rail ( 33 ) of the rotation support ( 32 ),

wherein, when rotation shafts of a pair of rotation supports ( 32 ) are inserted into the rotation shaft portion ( 60 ) and rotate in opposite directions, the rotation supports ( 32 ) first rotate in the opposite directions and then the inside supports ( 22 ) of which movement is controlled by the guide protrusions ( 52 ) rotate along guide grooves ( 24 ),

wherein, when a pair of inside supports ( 22 ) rotates fully along the rotation guide rails ( 33 ) of the rotation supports ( 32 ), the pair of inside supports ( 22 ) is controlled by the guide protrusions ( 52 ) such that a gap is formed between a pair of auxiliary panels ( 12 ), and

wherein a folded part of the flexible display panel ( 4 ) is located in the gap between the pair of auxiliary panels ( 12 ).

2. The in-folding type hinge structure having a flexible display panel installed thereon according to claim 1 , wherein stopper surfaces ( 25 ) of the pair of inside supports ( 22 ) come into contact with each other in a state in which the inside supports ( 22 ) are fully unfolded, and

wherein the contact between the stopper surfaces ( 25 ) prevents the pair of inside supports ( 22 ) from rotating further in a state in which the inside supports ( 22 ) are fully unfolded to prevent the auxiliary panels ( 12 ) fixed to the inside supports ( 22 ) from rotating further in the state in which the auxiliary panels are fully unfolded.