billboard,sign,light box三者的区别？

Billboard：一块用于广告宣传的大型图形广告牌。其尺寸通常较大，具有鲜艳的颜色和吸引人的图案。，Sign：标志是一个明显的、有符号性的标记或文字，常常出现在建筑物、公共设施或其他地方，用来表达某种含义或信息。，Light Box：是一种内部装有光源的金属箱，通常用于显示静态图像或视频，为广告活动增添视觉效果。

1、Billboard: Billboards are large outdoor advertising boards that are usually placed on roads, highways, or other public spaces. They typically display ads, messages, or promotions for businesses or organizations.

2、Sign: Signs are small, portable signs that are used to provide information or instructions to people. They can be found on sidewalks, buildings, bridges, and other outdoor surfaces. Signs can also serve as a form of art, often featuring images or messages related to specific topics or events.

3、Light Box: A light box is a type of small indoor advertising sign that is commonly used in places like movie theaters, supermarkets, and hospitals. These signs typically display advertisements or promotional materials, but they can also serve other purposes such as displaying promotional items or displaying important information about upcoming events.

Overall, the main difference between Billboard, Sign, and Light Box lies in their intended purpose and where they are typically located. While Billboard is used to advertise on public spaces, Sign provides information or instructions to people, while Light Box is used to display small, informational advertisements within an indoor space.