Foldable display device

A foldable display device comprising:

• a display panel;
• a polarizing member on the display panel;
• a window on the polarizing member;
• a first adhesive member between the display panel and the polarizing member;
• and
• a second adhesive member between the polarizing member and the window,
• wherein, in a first state, the display panel, the polarizing member, the window, the first adhesive member, and the second adhesive member are bent along a bending axis such that the window is closer to the bending axis than the display panel is,
• wherein each of the first adhesive member and the second adhesive member has a storage modulus in a range of 5×104 Pa to 5×105 Pa at −25° C.,
• wherein the second adhesive member has a storage modulus in a range of 4.5×104 Pa to 6.5×104 Pa at 60° C.,
• wherein the first adhesive member has a stress-relaxation ratio that is greater than 40 and less than 50, the stress-relaxation ratio being defined as
• Stress-relaxation ratio (%)=100×G(t2)/G(t1),
• wherein G(t1) is an initial stress-relaxation modulus measured in a state in which the first adhesive member is 600 μm thick, the initial stress-relaxation modulus being measured with a rheometer in a stress-relaxation test mode when a strain of 25% is removed after being applied using a parallel plate for 100 seconds at 60° C., and G(t2) is a stress-relaxation modulus measured after the strain is applied to the first adhesive member for 300 seconds,
• wherein the first adhesive member has a residual strain in a range of 5 to 8 at 60° C., the residual strain being defined as
• Residual strain (%)=L2/L1×100, and
• wherein L1 is a maximum creep strain for a state in which the first adhesive member is prepared to be 600 μm and when a stress of 2000 Pa is applied to the first adhesive member for 1 hour at 60° C. using a rheometer, and L2 is unrecovered residual recovery strain that remains along with elastic recovery strain that is recovered when the applied stress is removed after achieving the maximum creep strain.