公开(公告)号：US12124062B2

公开(公告)日：2024-10-22

申请号：US17406925

申请日：2021-08-19

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Masashi Kawashita ,  Yukari Oda ,  Yuki Yasu ,  Yoshiko Ishimaru

IPC: G02B5/20 ,  G02B5/28 ,  G02B27/12 ,  H10K50/858

CPC classification number: G02B5/203 ,  G02B5/201 ,  G02B5/28 ,  G02B27/12 ,  H10K50/858

Abstract: A wavelength selection filter includes a first high refractive index section with a thickness T1, a second high refractive index section with a thickness T2, a high refractive index layer with a refractive index n1, a projection-depression structure layer with a refractive index n2, a filling layer with a refractive index n3, a first high refractive index section with an area ratio R1, and a second high refractive index section with an area ratio R2. With n1>n2, n1>n3, and R1+R2>1, the value of T1×{n1×R1+n2×(1−R1)} is a first parameter, the value of T2×{n1×R2+n3×(1−R2)} is a second parameter, and the ratio of the second parameter to the first parameter is 0.7 or more and 1.3 or less.

公开(公告)号：US11867933B2

公开(公告)日：2024-01-09

申请号：US16884464

申请日：2020-05-27

Applicant: TOPPAN PRINTING CO., LTD.

Inventor： Hidemitsu Hakii ,  Masashi Kawashita ,  Yukari Oda ,  Tomoya Uchida

IPC: B42D25/373 ,  G02B1/18 ,  G02B5/28 ,  G02B5/00 ,  G02B5/30

CPC classification number: G02B5/285 ,  G02B1/18 ,  G02B5/008 ,  G02B5/30 ,  B42D25/373

Abstract: A display is provided with a periodic structure that is dielectric and includes a support and a plurality of periodic elements. A plurality of periodic elements is arranged on a reference plane in a two-dimensional lattice form having a sub-wavelength period and are either convexities projected or concavities recessed in the reference plane. A metal layer is disposed on a surface of the periodic structure. The surface corresponds to a plane including a region of the reference plane surrounding the individual periodic elements and surfaces of the periodic elements. The metal layer's profile conforms to a surface profile of the periodic structure. The plurality of periodic elements have an interval therebetween in a first direction in which the plurality of periodic elements are arranged in a two-dimensional lattice form. The interval is different from an interval between the periodic elements in a second direction intersecting the first direction.