MICROLENS ARRAY AND PROJECTION IMAGE DISPLAY DEVICE

• Main Authors: SHIBUYA KAZUYUKI, ARIMA MITSUO, HANASHIMA NAOKI, KANASUGI SHUNSUKE
• Format: Patent
• Language: English; Japanese
• Published: 20.05.2021
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS

To provide a microlens array with less diffusion intensity variation.SOLUTION: A microlens array disclosed herein comprises a plurality of microlenses arranged in a matrix in planar view. Each of the plurality of microlenses has four main sides, or four main sides and one or more sub-sides connecting two of the four main sides in planar view. At least one of the four main sides is at an angle with a virtual row line parallel to a row direction or with a virtual column line parallel to a column direction. In terms of intensity of diffusion light, a ratio of a 10% angle width in an x-direction to a 10% angle width in an xy-direction is in a range of 0.70 to 0.88, inclusive.SELECTED DRAWING: Figure 1 【課題】拡散強度のばらつきが少ないマイクロレンズアレイを提供することを目的とする。【解決手段】このマイクロレンズアレイは、平面視で複数のマイクロレンズが行列状に配列したマイクロレンズアレイであって、前記複数のマイクロレンズのそれぞれは、平面視で、４つの主辺、又は、前記４つの主辺及び前記４つの主辺のうち２つの主辺の間を繋ぐ１つ以上の副辺からなり、前記４つの主辺のうちの少なくとも一つは、行方向と平行な行仮想線または列方向と平行な列仮想線に対して傾斜しており、拡散光の光強度において、ｘｙ方向の１０％角度幅に対するｘ方向の１０％角度幅の比が０．７０以上０．８８以下の範囲である。【選択図】図１