Display device

A display device comprising a folding area foldable relative to a folding axis extended in a first direction, and a non-folding area adjacent to the folding area, the display device comprising:

• a display module;
• an upper module above the display module and comprising a window, a protective layer on the window, and a protective layer adhesive layer between the window and the protective layer;
• and
• a lower module under the display module and comprising a support plate, an upper adhesive layer above the support plate, and a lower adhesive layer under the support plate,
• wherein
• at least one from among the upper adhesive layer and the lower adhesive layer comprises a polymer compound comprising multiple polymer main chains and multiple crosslinking parts,
• the multiple crosslinking parts form multiple crosslinking bonds between the multiple polymer main chains through Diels-Alder reaction, and
• the multiple crosslinking bonds are to be separated by Retro-Diels-Alder reaction, and
• wherein the at least one from among the upper adhesive layer and the lower adhesive layer comprises a first adhesive part corresponding to the non-folding area and having a first adhesive strength with a glass substrate as an adherent and a second adhesive part corresponding to the folding area and having a second adhesive strength with the glass substrate as the adherent, the second adhesive strength being smaller than the first adhesive strength.

A display device comprising a folding area foldable relative to a folding axis extended in a first direction, and a non-folding area adjacent to the folding area, the display device comprising:

• a display module;
• an upper module above the display module and comprising a window, a protective layer on the window, and a protective layer adhesive layer between the window and the protective layer;
• and
• a lower module under the display module and comprising a support plate, an upper adhesive layer above the support plate, and a lower adhesive layer under the support plate,
• wherein
• at least one from among the upper adhesive layer and the lower adhesive layer comprises a polymer compound comprising multiple polymer main chains and multiple crosslinking parts,
• adjacent two crosslinking parts from among the multiple crosslinking parts are combined with each other by exposing to first ultraviolet rays with a wavelength of greater than about 280 nm to form a photodimer, and the photodimer is to undergo photolysis by second ultraviolet rays with a wavelength of about 280 nm or less, and
• wherein the at least one from among the upper adhesive layer and the lower adhesive layer comprises a first adhesive part corresponding to the non-folding area and having a first adhesive strength with a glass substrate as an adherent, and a second adhesive part corresponding to the folding area and having a second adhesive strength with the glass substrate as the adherent, the second adhesive strength being smaller than the first adhesive strength.