Provided is a dust cover in which warpage of the dust cover is suppressed, and in which polyene formation of a polarizer can be suppressed even when an iodine-based polarizer is used. The dust cover is a dust cover including a first support plate, a polarizing plate including an iodine-based polarizer, and a second support plate, the moisture permeability of at least one of the first support plate or the second support plate being 37 g/(m < 2 >. 24 hours) or more, and the thickness of at least one of the first support plate or the second support plate being 200 [mu] m or more. The distance between the center line LP of the iodine-based polarizer in the thickness direction thereof and the center line LD of the dust cap in the thickness direction thereof is 20 [mu] m or less.
本发明提供以下防尘盖:防尘盖被抑制翘曲,并且即使当使用基于碘的偏振片时,防尘盖也可以抑制偏振片的多烯形成。该防尘盖是包括第一支撑板、包括基于碘的偏振片的偏光板以及第二支撑板的防尘盖,第一支撑板或第二支撑板中至少一个的透湿性为37g/(m2·24小时)或更大,第一支撑板或第二支撑板中至少一个的厚度为200μm或更大。基于碘的偏振片在其厚度方向上的中心线LP与防尘盖在其厚度方向上的中心线LD之间的距离为20μm或更小。
Dustproof cover and head-up display device comprising same
防尘盖和包括该防尘盖的抬头显示装置
2024-12-27
Patent
Electronic Resource
Chinese
IPC: | G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / H05K PRINTED CIRCUITS , Gedruckte Schaltungen |
Multifunctional intelligent dustproof cover for motorcycle
European Patent Office | 2021