Title:
DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/079923
Kind Code:
A1
Abstract:
[Problem] To suppress unevenness in luminance distribution in two directions of microlenses arranged in a rectangular grid array and to improve homogeneity in light distribution. [Solution] Provided is a microlens array-type diffusion plate which is provided with a substrate and a microlens array comprising a plurality of microlenses that are arrayed in conformity to a rectangular grid on an X-Y plane of at least one surface of the substrate, wherein: X-direction grid intervals Wx of the microlenses arrayed in the X-direction of the rectangular grid are mutually different from each other; Y-direction grid intervals Wy of the microlenses arrayed in the Y-direction of the rectangular grid are mutually different from each other; and the respective microlenses have surface shapes that are different from each other.
Inventors:
ARIMA MITSUO (JP)
ISHIWATA MASAYUKI (JP)
KANASUGI SHUNSUKE (JP)
ISHIWATA MASAYUKI (JP)
KANASUGI SHUNSUKE (JP)
Application Number:
PCT/JP2020/039657
Publication Date:
April 29, 2021
Filing Date:
October 22, 2020
Export Citation:
Assignee:
DEXERIALS CORP (JP)
International Classes:
G02B5/02; G02B3/00; G02B3/06
Domestic Patent References:
| WO2018061816A1 | 2018-04-05 | |||
| WO2017043063A1 | 2017-03-16 | |||
| WO2018151097A1 | 2018-08-23 | |||
| WO2016051785A1 | 2016-04-07 | |||
| WO2015182619A1 | 2015-12-03 |
Foreign References:
| JP2017068216A | 2017-04-06 | |||
| JP2015169804A | 2015-09-28 |
Attorney, Agent or Firm:
AOMI PATENT (JP)
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