POLARIZING PLATE WITH RETARDATION LAYER AND IMAGE DISPLAY DEVICE INCLUDING THE POLARIZING PLATE WITH RETARDATION LAYER

• Main Authors: HAYASHI DAISUKE, TSUKAMOTO KATSUMI, FUJIMOTO NAOKI, SENDA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 25.05.2023
• Subjects: ADVERTISING; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; LABELS OR NAME-PLATES; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; SIGNS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

To provide a polarizing plate with a retardation layer in which the in-plane unevenness of the reflection hue is suppressed.SOLUTION: A polarizing plate with a retardation layer according to an embodiment of the present invention includes: a polarizing plate including a polarizer: and a first retardation layer. A phase difference change value RS of this polarizing plate with the retardation layer is equal to or less than 2.0. The phase difference change value RS is a slope of an approximate straight line of a value of an in-plane retardation Re (550) of the polarizing plate with the retardation layer measured in a state where tensions of 0 kg, 0.5 kg, 1 kg, 1.5 kg and 2 kg are applied.SELECTED DRAWING: Figure 1 【課題】反射色相の面内ムラが抑制された位相差層付偏光板を提供すること。【解決手段】本発明の実施形態の位相差層付偏光板は、偏光子を含む偏光板と、第１の位相差層と、を有する。この位相差層付偏光板の位相差変化値ＲＳは２．０以下であり、該位相差変化値ＲＳは０ｋｇ、０．５ｋｇ、１ｋｇ、１．５ｋｇ、および、２ｋｇの張力を付与した状態で測定された該位相差層付偏光板の面内位相差Ｒｅ（５５０）の値の近似直線の傾きである。【選択図】図１