Title:
DIFFUSION PLATE, DISPLAY DEVICE, PROJECTION DEVICE, LIGHTING DEVICE, AND REMOTE SENSING LIGHT SOURCE
Document Type and Number:
WIPO Patent Application WO/2022/131251
Kind Code:
A1
Abstract:
[Problem] Spectral noise generated due to the diffraction phenomenon of a periodic structure can be reduced to improve the homogeneity of the intensity of linear diffused light, and noise of 0th-order diffracted light can be reduced to improve light distribution. [Solution] A microlens array-type diffusion plate 1, which emits linear diffused light, comprises: a substrate 10; and a plurality of cylindrical lenses 21 arranged in the X direction on an XY plane of the substrate 10 and including convex portions or concave portions extending in the Y direction. The X-direction aperture width D and the radius of curvature R of each of the cylindrical lenses 21 randomly fluctuate, within fluctuation ranges defined by fluctuation full width ratios δD and δR, with respect to a reference aperture width Dk and a reference radius of curvature Rk. The eccentricity Ec of each of the cylindrical lenses 21 randomly fluctuates within a fluctuation range defined by a fluctuation full width ratio δEc. δD, δR, and δEc satisfy Equation (1), and at least one among δD and δR is not 0%.
Inventors:
ARIMA MITSUO (JP)
ISHIWATA MASAYUKI (JP)
NODA KAZUHIKO (JP)
KANASUGI SHUNSUKE (JP)
ISHIWATA MASAYUKI (JP)
NODA KAZUHIKO (JP)
KANASUGI SHUNSUKE (JP)
Application Number:
PCT/JP2021/046053
Publication Date:
June 23, 2022
Filing Date:
December 14, 2021
Export Citation:
Assignee:
DEXERIALS CORP (JP)
International Classes:
G02B5/02; F21V3/00; F21V5/00; F21V5/02; F21V5/04; G02B3/00; G02B3/06; G03B21/00; G09F9/00; F21Y115/10; F21Y115/30
Domestic Patent References:
| WO2009090828A1 | 2009-07-23 |
Foreign References:
| JP2011059667A | 2011-03-24 | |||
| JP2007334257A | 2007-12-27 | |||
| JP2015169804A | 2015-09-28 | |||
| CN103903519A | 2014-07-02 |
Attorney, Agent or Firm:
AOMI PATENT (JP)
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