La différence d'intensité lumineuse entre le blanc le plus clair et le noir le plus foncé.

Le rapport d'aspect est le rapport entre la largeur d'une image et sa hauteur. Le rapport d'aspect natif est celui pour lequel le projecteur/écran est particulièrement conçu. Les images affichées dans leur format d'origine utiliseront toute la résolution de l'écran et atteindront une luminosité maximale. Les images affichées dans un format autre que le format d'origine auront toujours une résolution et une luminosité moindres que les images affichées dans le format d'origine.

Measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more strongly, bringing them to a focus in a shorter distance.For an optical system in air, the effective focal length (f and f′) gives the distance from the front and rear principal planes (H and H′) to the corresponding focal points (F and F′).

Aperture range of the lens of the camera, expressed in f-stops

The amount that the camera lens can zoom.

Full High Definition (HD) means that a display supports a resolution of 1920 x 1080 pixel, and has a digital TV connection.

The device can be used with 3D technology.

The graphic resolutions that can be displayed by the device. The graphic resolution describes the width and height dimensions of a display, such as a computer monitor, measured in pixels.

The video modes that can be displayed by the device.

Number of USB 2.0 ports (connecting interfaces) in the device. USB 2.0 was released in April 2000 (now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), USB 2.0 ports are usually black.

Number of USB 3.0 (3.1 Gen 1) ports with Type-C connector. USB 3.0 (3.1 Gen 1) is USB interface version which supports transfer rate up to 5 Gbit/s (SuperSpeed). USB Type-C connector has symmetrical design architecture and compatible with Thunderbolt 3 interface.

The two sockets (ports) for transmitting left audio signal (white cable) and right audio signal (red cable).

The number of sockets (ports) for HDMI connections. HDMI (High-Definition Multimedia Interface) is a compact audio/video interface for transferring uncompressed video data and compressed/uncompressed digital audio data from a HDMI-compliant device ("the source device") to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for existing analog video standards.

High-bandwidth Digital Content Protection (HDCP) is a form of digital copy protection to prevent copying of digital audio and video content as it travels across connections.

The amplitude level of the undesired background noise, usually measured in decibels (db).

The device contains speaker(s) to produce sound.

RMS (Root mean square) is a measure of the continuous power required by a device, in particular audio amplifiers and loudspeakers.

Under which category can the device be positioned in the market, e.g. camera phone.

La sous-catégorie du produit

La couleur, p. ex. rouge, bleu, vert, noir, blanc.

Holes on the edge of devices through which a cable lock can be passed, so the device can be locked to a desk etc.