公开(公告)号：US12135406B2

公开(公告)日：2024-11-05

申请号：US18617293

申请日：2024-03-26

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Jun Tsujimoto ,  Yukimitsu Iwata ,  Michiaki Takei ,  Masafumi Tanaka ,  Keisuke Ikeda ,  Gen Furui

IPC: G02B1/11 ,  G02B5/30

Abstract: An optical film having high anti-glare properties and favorable fingerprints wiping off properties is provided. The optical film has a first surface, and a second surface which is a surface opposite to the first surface, wherein the optical film comprises an anti-reflection layer and an anti-glare layer in this order from the first surface to the second surface, the first surface has a profile of depressions and projections, the first surface has an arithmetic mean height Sa of 0.05 μm or more specified in ISO 25178-2:2012, and the first surface satisfies the relation represented by the following Expression 1: Sw×Vmp≤2.00 (Expression 1) wherein “Sw” represents a tilt angle (degrees) of 30 μl pure water droplet flowing down on the first surface; and “Vmp” represents a value of a peak material volume (ml/m2) of the first surface specified in ISO 25178-2:2012.

公开(公告)号：US11175768B2

公开(公告)日：2021-11-16

申请号：US16483339

申请日：2018-02-05

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Shubou Taya ,  Tomohiro Ogawa ,  Yosuke Takayama ,  Jun Tsujimoto ,  Gen Furui

IPC: G06F3/041 ,  G06F3/0354

Abstract: Provided is a method for selecting a touch panel pen writing member that enhances the efficiency for product design and quality management of writing members. A method for selecting a touch panel pen writing member, in which a writing member satisfying the following requirement A1-1 is selected as the touch panel pen writing member: A touch panel pen is secured in a state of being in contact with the surface of the touch panel pen writing member at an angle of 60 degrees, then while a vertical load of 100 gf is kept applied to the touch panel pen and while the touch panel pen writing member is moved 40 mm in one direction at a speed of 14 mm/second, the kinetic friction force in the movement direction given to the touch panel pen is measured at intervals of 0.001 seconds, and an average of the kinetic friction forces obtained every 0.001 second is calculated. Furthermore, after the movement of 40 mm in one direction of the touch panel pen writing member is completed, the vertical load of 100 gf applied to the touch panel pen is maintained, the touch panel pen is kept in the state of being in contact with the surface of the touch panel pen writing member at an angle of 60 degrees. In this state, the residual friction force in the movement direction given to the touch panel pen is measured at intervals of 0.001 seconds, and an average of residual friction forces obtained every 0.001 second is calculated. The average of the kinetic friction force and the average of the residual friction force satisfy a relationship “0.45

公开(公告)号：US11960162B2

公开(公告)日：2024-04-16

申请号：US18350424

申请日：2023-07-11

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Mitsuhiro Kuzuhara ,  Yukimitsu Iwata ,  Jun Tsujimoto ,  Shigeki Murakami ,  Gen Furui

IPC: G02B1/11 ,  G01J1/02 ,  G02F1/1333 ,  G02F1/1335

CPC classification number: G02F1/133502 ,  G01J1/0242 ,  G02B1/11 ,  G02F1/133314 ,  G02F1/133331

Abstract: Provided is an anti-glare film excellent in anti-glare properties and capable of suppressing reflected scattered light. The anti-glare film includes an anti-glare layer, the anti-glare film having an uneven surface, wherein for an amplitude spectrum of elevation of the uneven surface, when a sum of amplitudes corresponding to spatial frequencies of 0.005 μm−1, 0.010 μm−1, and 0.015 μm−1 is defined as AM1 and an amplitude at a spatial frequency of 0.300 μm−1 is defined as AM2, AM1 is 0.070 μm or more and 0.400 μm or less, AM2 is 0.0050 μm or more, and AM2

公开(公告)号：US10795496B2

公开(公告)日：2020-10-06

申请号：US16307078

申请日：2017-05-31

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Shubou Taya ,  Yosuke Takayama ,  Tomohiro Ogawa ,  Jun Tsujimoto

IPC: G06F3/041 ,  H04R7/04 ,  H04R1/02

Abstract: It is intended to provide a method for selecting a writing sheet for a touch panel pen that can accurately select a writing sheet with which the generation of unpleasant sounds during writing is suppressed. According to the method for selecting a writing sheet for a touch panel pen, a sheet satisfying condition 1-1 and condition 1-2 described below is selected as a writing sheet for a touch panel pen. Sound generated when writing is performed under predetermined conditions using a touch panel pen on the surface of a writing sheet for a touch panel pen is recorded. The sound pressure (dB/Hz) is calculated for each 1 Hz from the recorded sound by means of fast Fourier transform. The values of the dB/Hz at frequencies from 1 Hz to 20,000 Hz are normalized to have a maximum value of 100 and a minimum value of 0, and the normalized values of dB/Hz are adopted as rated sound pressures P. The frequencies from 1 Hz to 20,000 Hz are divided into ten segments of 2,000 Hz each, and integrated values of the rated sound pressures P of each segment are calculated. When the integrated value of the rated sound pressures P for frequencies of 1 Hz or more and less than 2,000 Hz as a first segment is represented by P1, and the integrated value of the rated sound pressures P for frequencies of 18,000 Hz or more and 20,000 Hz or less as a tenth segment is represented by P10, P1/P10 is 1.25 or more. When a standard deviation σ of the integrated values of the rated sound pressures P of the ten segments is calculated, σ is 13,500 or less.

公开(公告)号：US09535194B2

公开(公告)日：2017-01-03

申请号：US14643550

申请日：2015-03-10

Applicant: DAI NIPPON PRINTING CO., LTD.

Inventor： Gen Furui ,  Jun Tsujimoto ,  Aya Naitou

IPC: G02B5/02 ,  B05D5/06 ,  G06F3/041 ,  G02F1/1335

CPC classification number: G02B5/0221 ,  B05D5/06 ,  G02F2001/133507 ,  G06F3/0412

Abstract: An optical sheet used as a component for a touch panel or a display element of a display device is capable of imparting a variety of characteristics such as anti-glare properties and preventing the scintillation of image light in ultrahigh-definition display elements having a pixel density of 300 ppi or more. The optical sheet has an uneven shape on a surface, and the uneven shape satisfies at least one of three disclosed conditions relating to the inclination angles of the uneven portions of the sheet and the distribution curves of the inclination angles.

Abstract translation: 用作触摸面板或显示装置的显示元件的组件的光学片能够赋予诸如防眩性的各种特性，并且防止图像光在具有像素密度的超高清晰度显示元件中闪烁 300 ppi以上。 光学片在表面上具有不均匀的形状，并且不平坦形状满足关于片材的不平坦部分的倾斜角度和倾斜角度的分布曲线的三个公开的条件中的至少一个。