Display apparatus including multilayer neutral plane compensation member
A display apparatus includes a display panel part, a polarizing member, and a neutral plane compensation member disposed between the display panel part and the polarizing member. The neutral plane compensation member includes a first layer and a second layer, a thickness of the first layer being in a range of 20 μm to 60 μm, and a modulus of elasticity of the first layer being in a range of 1×10 8 Pa to 1×10 10 Pa, a thickness of the second layer being in a range of 20 μm to 60 μm, and a modulus of elasticity of the second layer being in a range of 1×10 4 Pa to 1×10 6 Pa.
1 . A display apparatus, comprising:
a display panel;
a polarizing member disposed on the display panel; and
a neutral plane compensation member disposed between the display panel and the polarizing member, the neutral plane compensation member including a first layer and a second layer,
a thickness of the first layer being in a range of 20 μm to 60 μm, and a modulus of elasticity of the first layer being in a range of 1×10 8 Pa to 1×10 10 Pa, and
a thickness of the second layer being in a range of 20 μm to 60 μm, and a modulus of elasticity of the second layer is in a range of 1×10 4 Pa to 1×10 6 Pa.
2 . The display apparatus of claim 1 , wherein the polarizing member includes a polarizing film layer, a retardation film layer, and a compensation film layer.
3 . The display apparatus of claim 1 , wherein an in-plane retardation value of the neutral plane compensation member is 5 nm or less.
4 . The display apparatus of claim 1 , wherein a retardation value in a thickness direction of the neutral plane compensation member is 40 nm or less.
5 . The display apparatus of claim 2 , wherein the retardation film layer is a quarter-wavelength plate, and
wherein an in-plane retardation axis of the neutral plane compensation member is horizontal or perpendicular to an in-plane retardation axis of the quarter-wavelength plate.
6 . The display apparatus of claim 1 , wherein the thickness of the first layer is 25 μm, the thickness of the second layer is 25 μm, and the modulus of elasticity of the second layer is in a range of 0.7×10 5 Pa to 2.3×10 5 Pa.
7 . The display apparatus of claim 1 , wherein the thickness of the first layer is 50 μm, the thickness of the second layer is 25 μm, and the modulus of elasticity of the second layer is in a range of 0.5×10 5 Pa to 2.5×10 5 Pa.
8 . The display apparatus of claim 1 , wherein the thickness of the first layer is 25 μm, the thickness of the second layer is 50 μm, and the modulus of elasticity of the second layer is in a range of 1.0×10 5 Pa to 2.2×10 5 Pa.
9 . The display apparatus of claim 1 , wherein the thickness of the first layer is 50 μm, the thickness of the second layer is 50 μm, and the modulus of elasticity of the second layer is in a range of 0.6×10 5 Pa to 2.4×10 5 Pa.
10 . The display apparatus of claim 2 , wherein the polarizing film layer, the retardation film layer, and the compensation film layer are sequentially stacked in a direction toward the neutral plane compensation member.
11 . The display apparatus of claim 10 , wherein the retardation film layer is a quarter-wavelength plate,
wherein the compensation film layer is a +C plate layer, and
wherein the quarter-wavelength plate and the +C plate layer include liquid crystals oriented in one direction.
12 . The display apparatus of claim 1 , wherein the display panel includes an anode electrode, a light-emitting element layer, a cathode electrode, and a sealing layer stacked in a direction toward the neutral plane compensation member.
13 . The display apparatus of claim 12 , wherein the display panel includes a touch electrode layer disposed on the sealing layer.
14 . A flexible display apparatus, comprising:
a display panel;
a polarizing member disposed on the display panel; and
a neutral plane compensation member disposed between the display panel and the polarizing member,
the neutral plane compensation member including a first layer and a second layer,
a thickness of the first layer being in a range of 20 μm to 60 μm, and a modulus of elasticity of the first layer is in a range of 1×10 8 Pa to 1×10 10 Pa,
a thickness of the second layer is in a range of 20 μm to 60 μm, and a modulus of elasticity of the second layer is in a range of 1×10 4 Pa to 1×10 6 Pa, and
the flexible display apparatus is bendable or foldable toward the display panel.
15 . The display apparatus of claim 14 , wherein an in-plane retardation value of the neutral plane compensation member is 5 nm or less.
16 . The display apparatus of claim 14 , wherein a retardation value in a thickness direction of the neutral plane compensation member is 40 nm or less.
17 . The display apparatus of claim 14 , wherein the polarizing member includes a polarizing film layer, a retardation film layer, and a compensation film layer sequentially stacked in a direction toward the neutral plane compensation member.
18 . A display apparatus, comprising:
a display panel;
a polarizing member disposed on the display panel; and
a neutral plane compensation member disposed between the display panel and the polarizing member, the neutral plane compensation member including a first layer having a first modulus of elasticity and a second layer having a second modulus of elasticity less than the first modulus of elasticity,
wherein the first layer is in contact with the polarizing member, and the second layer is in contact with the display panel.
19 . The display apparatus of claim 18 , wherein a thickness of the first layer is a range of 20 μm to 60 μm, and a thickness of the second layer is in a range of 20 μm to 60 μm.
20 . The display apparatus of claim 18 , wherein the first modulus of elasticity is in a range of 1×10 8 Pa to 1×10 10 Pa and the second modulus of elasticity is in a range of 1×10 4 Pa to 1×10 6 Pa.