Polarizing plate with optical compensation layer and organic el panel using same

A polarizing plate with optical compensation layers, comprising:

• a polarizer;
• a first optical compensation layer;
• a second optical compensation layer;
• a third optical compensation layer;
• and
• a fourth optical compensation layer,
• wherein each of the first optical compensation layer, the second optical compensation layer, the third optical compensation layer, and the fourth optical compensation layer shows a refractive index characteristic of nx>nz>ny, and satisfies a relationship of Re(450)≥Re(550) where Re(450) and Re(550) represent in-plane retardations measured at 23° C. with light having a wavelength of 450 nm and light having a wavelength of 550 nm, respectively,
• wherein the first optical compensation layer has an Re(550) of from 230 nm to 310 nm and an Nz coefficient of from 0.1 to 0.4, and an absorption axis of the polarizer and a slow axis of the first optical compensation layer are substantially perpendicular to each other,
• wherein the second optical compensation layer has an Re(550) of from 210 nm to 270 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the second optical compensation layer is more than 0° and 20° or less, or more than 90° and 110° or less,
• wherein the third optical compensation layer has an Re(550) of from 210 nm to 270 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the third optical compensation layer is from 25° to 45°, or from 115° to 135°, and
• wherein the fourth optical compensation layer has an Re(550) of from 80 nm to 160 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the fourth optical compensation layer is from 5° to 25°, or from 95° to 115°.

A polarizing plate with optical compensation layers, comprising:

• a polarizer;
• a first optical compensation layer;
• a second optical compensation layer;
• a third optical compensation layer;
• and
• a fourth optical compensation layer,
• wherein each of the first optical compensation layer, the second optical compensation layer, the third optical compensation layer, and the fourth optical compensation layer shows a refractive index characteristic of nx>nz>ny, and satisfies a relationship of Re(450)≥Re(550) where Re(450) and Re(550) represent in-plane retardations measured at 23° C. with light having a wavelength of 450 nm and light having a wavelength of 550 nm, respectively,
• wherein the first optical compensation layer has an Re(550) of from 230 nm to 310 nm and an Nz coefficient of from 0.6 to 0.9, and an absorption axis of the polarizer and a slow axis of the first optical compensation layer are substantially parallel to each other,
• wherein the second optical compensation layer has an Re(550) of from 210 nm to 270 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the second optical compensation layer is more than 0° and 20° or less, or more than 900 and 110° or less,
• wherein the third optical compensation layer has an Re(550) of from 210 nm to 270 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the third optical compensation layer is from 25° to 45°, or from 115° to 135°, and
• wherein the fourth optical compensation layer has an Re(550) of from 80 nm to 160 nm and an Nz coefficient of from 0.3 to 0.7, and an angle formed by an absorption axis of the polarizer and a slow axis of the fourth optical compensation layer is from 5° to 25°, or from 95° to 115°.