Title:
DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/190673
Kind Code:
A1
Abstract:
[Problem] To provide a display device capable of maintaining display performance even when an image is visually recognized in an inclined state. [Solution] A display device according to an embodiment comprises a light reflective image display layer, and an elliptically polarizing plate having a polarizer, a λ/2 part, and a λ/4 part. The λ/2 part is a laminate in which a first retarder element, a second retarder element, a second retarder element, and a first retarder element are laminated. When the in-plane retardation at a wavelength of 550 nm of a projection surface having an inclination angle of 45° with respect to the thickness direction of the image display layer is denoted by ReM45, and the in-plane retardation at a wavelength of 550 nm of the λ/4 part is denoted by ReoQ, and a ρ coefficient (ρ) of the image display layer is expressed by equation (A), an Nz coefficient (Nz) of the λ/4 part and the ρ coefficient (ρ) satisfy a relationship indicated by equation (B). Equation (A): ρ = ReM45/ReoQ, Equation (B): 4.5ρ-0.160 < Nz < 4.5ρ+0.955
[Selected drawing] FIG. 1
Inventors:
DEZAKI HIKARI (JP)
Application Number:
PCT/JP2022/002406
Publication Date:
September 15, 2022
Filing Date:
January 24, 2022
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; B32B7/023; G09F9/00; H01L27/32; H01L51/50; H05B33/02
Foreign References:
| JP2006259694A | 2006-09-28 | |||
| JP2021009360A | 2021-01-28 | |||
| JP2021002026A | 2021-01-07 | |||
| JP2010102288A | 2010-05-06 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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