Member for display device, optical stacked body, and display device

An optical stacked body comprising a glass substrate, a first resin layer, a second resin layer, and a third resin layer, in this order, wherein

• a layer including a resin is present only on one surface side of the glass substrate;
• a thickness of the glass substrate is 100 μm or less;
• a composite elastic modulus of the first resin layer is 6.0 GPa or more and 20 GPa or less, and a thickness of the first resin layer is 5 μm or more and 60 μm or less;
• the first resin layer includes a polyimide or a polyamideimide;
• the second resin layer is a pressure-sensitive adhesive layer;
• the third resin layer is a resin film including a resin selected from a group consisting of a polyester based resin, a polycycloolefin based resin, an acetylcellulose based resin, a polycarbonate based resin, and a polypropylene based resin;
• the glass substrate is a chemically strengthened glass;
• a hard coating layer is present on the third resin layer, on a surface opposite to the second layer side;
• the hard coating layer includes an ultraviolet absorber;
• after a test in which the optical stacked body is parallelly folded so that the glass substrate is on an inner side, and a distance between two opposing short side portions of the optical stacked body is 10 mm, left to stand at 23° C. for 240 hours under a folded condition, and then relieved from the folded condition, the opening angle of the optical stacked body, after 30 minutes at room temperature, is 130° or more;
• and
• after a test in which the optical stacked body is parallelly folded so that the glass substrate is on an outer side, and a distance between two opposing short side portions of the optical stacked body is 10 mm, left to stand at 23° C. for 240 hours under a folded condition, and then relieved from the folded condition, the opening angle of the optical stacked body, after 30 minutes at room temperature, is 130° or more.