OPTICAL LAMINATE AND ELLIPTICAL POLARIZING PLATE

• Main Author: DEZAKI HIKARI
• Format: Patent
• Language: English; Korean
• Published: 16.09.2022
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PERFORMING OPERATIONS; PHYSICS; TRANSPORTING

The present invention is to provide an optical laminate and an elliptical polarizing plate that can ensure good display performance even when viewed by tilting in at least two in-plane orthogonal directions when disposed on a light reflection layer. An optical laminate according to an embodiment has a λ/2 part having a first slow axis, and a λ/4 part having a second slow axis and stacked on the λ/2 part so that the second slow axis is in a range of about 60° with respect to the first slow axis. The Nz coefficient of the λ/2 part is about 0.5. The Nz coefficient of the λ/4 part is 0.3 or more and 0.7 or less. [과제] 광반사층 상에 배치한 경우에, 적어도 면내 직교 2방향으로 기울여 시인한 경우라도 양호한 표시 성능을 확보 가능한 광학 적층체 및 타원 편광판을 제공한다. [해결수단] 일 실시형태에 따른 광학 적층체는, 제1 지상축을 갖는 λ/2부와, 제2 지상축을 갖고 있고 제2 지상축이 제1 지상축에 대하여 약 60°의 범위가 되도록 λ/2부에 적층된 λ/4부를 구비하며, λ/2부의 Nz 계수가 약 0.5이고, λ/4부의 Nz 계수가 0.3 이상 0.7 이하이다.