# 2-dimensional display

> display type

**Wikidata**: [Q54006522](https://www.wikidata.org/wiki/Q54006522)  
**Source**: https://4ort.xyz/entity/2-dimensional-display

## Summary
A **2-dimensional display** is a specific type of display device that presents visual information in a bi-dimensional plane. It acts as a subclass of display devices—hardware components that convert electronic signals into images or text—and serves as one of the primary structural categories alongside segment and 3-dimensional displays.

## Key Facts
- **Classification**: A subclass of **display device**.
- **Also Known As**: full-area 2-dimensional display, two-dimensional display, full-area two-dimensional display, bi-dimensional display, full-area bi-dimensional display.
- **Definition**: Categorized as a "display type" within the knowledge base structure.
- **Structural Role**: Forms a "disjoint union" with segment displays and 3-dimensional displays to conceptually comprise the broader category of display devices.
- **Inheritance**: Inherits properties from the parent class **display device**, which is defined as an **output device** for presenting information in visual form and a **manifestation of display technology**.
- **Contextual Usage**: Functions within the broader ecosystem of electronic visual displays, which are utilized in computers, traffic signs, and braille readers.

## FAQs
### What is a 2-dimensional display?
A 2-dimensional display is a visual output device that renders images, text, or symbols on a flat plane. It is a distinct subclass of display devices, separate from 3-dimensional and segment displays.

### What are the other names for a 2-dimensional display?
This entity is also referred to as a **two-dimensional display**, **bi-dimensional display**, or more specifically as a **full-area 2-dimensional display** or **full-area bi-dimensional display**.

### How does a 2-dimensional display relate to other display technologies?
It is one of three fundamental types that make up the "disjoint union" of display devices, alongside segment displays (like those in digital clocks) and 3-dimensional displays (such as holographic systems).

### What are the defining characteristics inherited by 2-dimensional displays?
As a subclass of display devices, 2-dimensional displays are characterized by technical specifications such as **display aspect ratio** and **display resolution**, and they function as part of measuring instrument systems.

## Why It Matters
2-dimensional displays represent the standard interface for the majority of visual electronic communication. While display devices as a whole range from simple indicator lights to complex 3D holographic systems, the 2-dimensional display is the foundational format for monitors, televisions, and mobile screens. By converting electronic signals into flat visual representations, these devices serve as the primary bridge between digital processing and human perception, enabling the consumption of media, operation of machinery, and navigation of information systems in daily life.

## Notable For
- **Nomenclature Variations**: Distinguished by having multiple specific aliases, including "full-area bi-dimensional display" and "bi-dimensional display."
- **Taxonomic Position**: Serving as a core subclass within the "disjoint union" that defines the entire display device category.
- **Broad Applicability**: Acting as the standard format for the "manifestation of display technology" described in the parent class.

## Body

### Definition and Classification
The **2-dimensional display** is a subclass of **display device**, which is itself a subclass of **output device**. It is defined as a "display type" and is formally recognized under several aliases, including **two-dimensional display**, **bi-dimensional display**, **full-area 2-dimensional display**, **full-area two-dimensional display**, and **full-area bi-dimensional display**.

It exists within a strict hierarchy where it is considered a **manifestation of display technology** and functions as part of a **measuring instrument** system.

### Structural Hierarchy
The entity fits into a specific taxonomic structure:
- **Parent Class**: **Display device** (Output device for presentation of information in visual form).
- **Siblings**: **Segment display** and **3-dimensional display**.
- **Disjoint Union**: Along with its siblings, the 2-dimensional display forms a disjoint union that comprises the complete set of display devices.

### Context from Parent Class: Display Device
As a subclass, the 2-dimensional display operates within the context of the **display device**, which provides the following defining characteristics and ecosystem:

#### Function and Usage
Display devices convert electronic signals into visual forms such as images, text, or symbols. They are utilized in a wide array of hardware, including:
- Flat-panel monitors
- LED screens
- Computer monitors
- Traffic signs
- System consoles
- Refreshable braille readers
- Indicator lights

#### Technical Characteristics
The performance and physical nature of these displays are defined by:
- **Display Aspect Ratio**: Determines the proportional shape of the image.
- **Display Resolution**: Defines the number of distinct pixels.
- **Technology Types**: Can be implemented via flat-panel, LED, transparent, or multiplexed designs.

#### Related Entities
The 2-dimensional display shares lineage and relationships with several related hardware categories:
- **Monitor** / **Computer Monitor**
- **System Console**
- **Indicator Light**
- **Radar Display**
- **Tote Board**
- **Variable-message Sign**
- **Projection Screen**

#### Cataloguing and Identifiers
The parent class **display device** is catalogued under the following identifiers and standards, providing the bibliographic framework for the 2-dimensional display:
- **GND ID**: 4122815‑7
- **PSH ID**: 12415
- **YSO ID**: 3627
- **Freebase ID**: /m/029zz6
- **BabelNet ID**: 00027675n
- **EuroVoc ID**: 5601
- **KBpedia ID**: DisplayDevice (2020‑07‑09)
- **Metasat ID**: displayDevice
- **Library of Congress**: sh85066140 (Information display systems)
- **Wikimedia Commons**: Category:Display devices