Display module and electronic apparatus having the same
A display module includes a display panel, a protective film, and an adhesive layer. The display panel includes a non-display area adjacent to a display area. The protective film is under the display panel, and the adhesive layer is between the display panel and the protective film. The protective film is or includes a polyethylene terephthalate film having a glass transition temperature equal to or greater than about 95° C.
1. A display module, comprising:
a display panel comprising a display area and a non-display area adjacent to the display area;
a protective film under the display panel; and
an adhesive layer between the display panel and the protective film,
wherein the protective film comprises a polyethylene terephthalate film from which at least a portion of an oligomer has been removed, and wherein the polyethylene terephthalate film has a glass transition temperature equal to or greater than about 95° C. from removal of the at least a portion of the oligomer.
2. The display module of claim 1 , wherein the polyethylene terephthalate film has a light transmittance equal to or greater than about 90% in a wavelength range from about 400 nm to about 700 nm.
3. The display module of claim 1 , wherein the polyethylene terephthalate film has a thermal shrinkage rate equal to or less than about 0.2% at a temperature of about 150° C.
4. The display module of claim 1 , wherein the polyethylene terephthalate film has a haze equal to or less than about 1%.
5. The display module of claim 1 , wherein the polyethylene terephthalate film has a modulus equal to or greater than about 4 GPa.
6. The display module of claim 1 , wherein the protective film further comprises a coating layer in contact with one surface of the polyethylene terephthalate film.
7. The display module of claim 6 , wherein the coating layer comprises an ion material having an anti-static function.
8. The display module of claim 6 , wherein the coating layer has a thickness equal to or greater than about 0.5 μm and equal to or less than about 2 μm.
9. The display module of claim 1 , wherein the adhesive layer comprises a pressure sensitive adhesive.
10. The display module of claim 1 , wherein the adhesive layer has a thickness equal to or greater than about 15 μm and equal to or less than about 18 μm.
11. The display module of claim 1 , further comprising a driving chip mounted on the display panel to overlap the non-display area.
12. The display module of claim 1 , wherein the display panel is configured to fold and unfold about a folding axis extending in one direction.
13. An electronic apparatus, comprising:
a display panel comprising a plurality of pixels, the display panel configured to fold and unfold about a folding axis in one direction;
a window on the display panel;
a protective film under the display panel;
an adhesive layer between the display panel and the protective film;
a support member disposed under the protective film and provided with a hole defined therethrough to overlap the display panel; and
an electronic module in the hole, wherein the protective film comprises a polyethylene terephthalate film from which at least a portion of an oligomer has been removed, and wherein the polyethylene terephthalate film has a glass transition temperature equal to or greater than about 95° C. from removal of the at least a portion of the oligomer.
14. The electronic apparatus of claim 13 , wherein the polyethylene terephthalate film has a thermal shrinkage rate equal to or less than about 0.2% at a temperature of about 150° C.
15. The electronic apparatus of claim 13 , wherein:
the protective film further comprises a coating layer in contact with one surface of the polyethylene terephthalate film, and
the coating layer has a thickness equal to or greater than about 0.5 μm and equal to or less than about 2 μm.
16. The electronic apparatus of claim 15 , wherein the protective film has a haze equal to or less than about 0.4%.
17. The electronic apparatus of claim 15 , wherein the protective film has a light transmittance equal to or greater than about 92% in a wavelength range from about 430400 nm to about 700 nm.
18. The electronic apparatus of claim 15 , wherein the coating layer comprises an ion material having an anti-static function.
19. The electronic apparatus of claim 13 , further comprising:
a driving chip mounted on the display panel and configured to provide electrical signals to the pixels.
20. The electronic apparatus of claim 13 , wherein the electronic module comprises a camera module.