# projection screen

> white screen for projecting

**Wikidata**: [Q1152429](https://www.wikidata.org/wiki/Q1152429)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Projection_screen)  
**Source**: https://4ort.xyz/entity/projection-screen

## Summary
A projection screen is a white screen designed specifically for displaying projected images. It is classified as a display device, functioning as an output device for the presentation of information in visual form.

## Key Facts
*   **Classification:** It is a distinct subclass of **display device**, defined as an output device for presenting information in visual form.
*   **Definition:** The entity is fundamentally described as a "white screen for projecting."
*   **Variants:** Specific types include the **silver screen** and the **inflatable movie screen** (an apparatus for displaying a projected image).
*   **Cultural Variants:** It is associated with **maku**, a traditional Japanese cloth used for curtains and awnings.
*   **Commercial Taxonomy:** In product classification systems, it is categorized under "Electronics > Video > Video Accessories > Projector Accessories" (Google Product Taxonomy ID 395).
*   **Identifiers:** The entity has a Wikidata description matching its definition and is listed in the Encyclopædia Britannica Online under "technology/projection-screen."
*   **Global Reach:** Wikipedia entries for the projection screen exist in over 29 languages, including Arabic, German, Spanish, Persian, and Japanese.

## FAQs
### Q: What is a projection screen?
A: A projection screen is a white surface used to display projected images. It acts as a display device to present visual information.

### Q: What are the different types of projection screens?
A: Based on available data, types include the "silver screen" and the "inflatable movie screen." There is also a related classification to "maku," a Japanese cloth used for similar purposes.

### Q: How is a projection screen classified in electronics?
A: It is classified as a display device and is categorized under video accessories (specifically projector accessories) in commercial product taxonomies.

## Why It Matters
The projection screen serves as the essential interface between a projector's optical output and the viewer's visual perception. While a projector creates the image, the screen is the display device that renders the information in a visible, high-fidelity form. Without a proper surface to diffuse the light, the projected image would lack contrast, brightness, and definition.

Its significance is underscored by its widespread global recognition, evidenced by the existence of the entity in the Encyclopædia Britannica and the Armenian Soviet Encyclopedia, as well as its translation into dozens of languages. The device supports a vast array of human activities, from cinematic entertainment on "silver screens" and inflatable outdoor movies to educational and business presentations. By providing a standardized, specialized surface for visual output, the projection screen remains a fundamental component in visual communication technology.

## Notable For
*   **Visual Output:** Being the primary hardware surface (display device) for viewing projected visual information.
*   **Global Terminology:** Possessing a wide variety of aliases across languages and regions, such as "Leinwand" (German), "映画幕" (Japanese), and "Pantalla de proyeccion" (Spanish).
*   **Variety of Forms:** Encompassing diverse forms ranging from standard fixed frames to inflatable apparatuses for mobile or outdoor viewing.
*   **Industry Classification:** Holding a specific place in global trade and procurement classifications (e.g., Common Procurement Vocabulary code 38653400).

## Body

### Definition and Classification
A projection screen is defined structurally as a "white screen for projecting." Functionally, it falls under the class of **display devices**. In this hierarchy, a display device is any output device utilized for the presentation of information in visual form. The projection screen serves as the terminal point for a video signal, allowing static or moving images to be viewed by an audience.

### Types and Variants
The entity encompasses several specific forms and related objects:
*   **Silver Screen:** A specific class of projection screen historically associated with the film industry.
*   **Inflatable Movie Screen:** An apparatus designed for displaying projected images that can be inflated, often used for outdoor events.
*   **Maku:** A related entity defined as a Japanese cloth used for curtains and awnings, linking the modern projection screen to traditional textile displays.

### Global and Academic Recognition
The projection screen is a recognized subject in major encyclopedic and academic databases.
*   **Encyclopædia Britannica:** The topic is indexed as "technology/projection-screen."
*   **Armenian Soviet Encyclopedia:** It is described in Volume 5 (page 437).
*   **Library Science:** It is indexed in the General Finnish Ontology (YSO) with the ID 22842 and the KBpedia system as "ProjectionScreen."

### Product and Trade Identification
In commerce and industry, the projection screen is identified by specific codes to facilitate trade and procurement.
*   **Google Product Taxonomy:** It is assigned ID 395, categorized under "Electronics > Video > Video Accessories > Projector Accessories > Projection Screens."
*   **Procurement:** The Common Procurement Vocabulary (CPV) code for the device is 38653400.
*   **Harmonized System:** The AHECC 2017 ID for the item is 90106000.

## References

1. Freebase Data Dumps. 2013
2. YSO-Wikidata mapping project. 2023
3. KBpedia