LIGHT EXTRACTION FILM FOR EL ELEMENT AND SURFACE-EMITTING BODY

• Main Authors: SAEKI YUMIKO, OKUNO DAICHI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To provide a light extraction film for EL element capable of improving the light extraction efficiency and front face brightness of a surface-emitting body.SOLUTION: The light extraction film for EL element with an adhesive layer has an optical function layer on one face and the adhesive layer on the other face. The adhesive layer is constituted of an adhesive resin which contains (X) units of a polar-group containing compound and (Y) units of a crosslinking agent; and the refraction index of the adhesive resin is 1.47 to 1.62, the glass-transition temperature of the adhesive resin is -70- 0°C.SELECTED DRAWING: Figure 1 【課題】面発光体の光取り出し効率や正面輝度を向上させるＥＬ素子用光取り出しフィルムを提供する。【解決手段】粘着層を有するＥＬ素子用光取り出しフィルムであって、一方の面に光学機能層を有し、他方の面に粘着層を有し、粘着層は、極性基含有化合物（Ｘ）単位及び架橋剤（Ｙ）単位を含む粘着性樹脂で構成され、粘着性樹脂の屈折率が、１．４７〜１．６２であり、粘着性樹脂のガラス転移温度が、−７０℃〜０℃である、ＥＬ素子用光取り出しフィルム。【選択図】図１