US 11,953,710 B2
Display panel, display device, and method for sorting phase difference layer of display panel
Satoshi Emori, Seoul (KR); and Takashi Kuroda, Moriya (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Filed on Sep. 25, 2020, as Appl. No. 17/032,483.
Application 17/032,483 is a continuation of application No. PCT/JP2019/013561, filed on Mar. 28, 2019.
Claims priority of application No. 2018-063165 (JP), filed on Mar. 28, 2018.
Prior Publication US 2021/0181398 A1, Jun. 17, 2021
Int. Cl. G02B 5/30 (2006.01); C09K 19/34 (2006.01); C09K 19/38 (2006.01); C09K 19/54 (2006.01); C09K 19/58 (2006.01); H10K 50/11 (2023.01); H10K 50/84 (2023.01); H10K 50/858 (2023.01); H10K 50/86 (2023.01); H10K 85/00 (2023.01); G02F 1/13363 (2006.01); H01L 25/075 (2006.01)
CPC G02B 5/3083 (2013.01) [C09K 19/3477 (2013.01); C09K 19/3491 (2013.01); C09K 19/3857 (2013.01); C09K 19/3861 (2013.01); C09K 19/544 (2013.01); C09K 19/586 (2013.01); G02B 5/3016 (2013.01); H10K 50/11 (2023.02); H10K 50/84 (2023.02); H10K 50/858 (2023.02); H10K 50/86 (2023.02); H10K 85/731 (2023.02); G02F 1/133633 (2021.01); G02F 1/133638 (2021.01); H01L 25/075 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A display panel comprising: a display element (A), a retardation layer (B) positioned upon the light emission surface side of the display element, and a polarizer (C) positioned upon the light emission surface side of the retardation layer, wherein the retardation layer (B) includes a λ/4 retardation layer (B1), and the in-plane retardation of the λ/4 retardation layer (B1) satisfies the following condition 1:
<Condition 1>
The spectral reflectance of the display element is measured by a Specular Component Included (SCI) method, the average reflectance at wavelengths over the range of 400 nm or more and less than 550 nm is obtained as R1, the average reflectance at wavelengths over the range of 550 nm or more and less than 700 nm is obtained as R2, and when the value of R1/R2 is calculated and obtained as x, the in-plane retardation of the λ/4 retardation layer falls within the range of −4.6002x+119.24 nm or more and −4.6002x+129.24 nm or less.