lysbildeserie

A lysbildeserie is a term used primarily in Sweden and Norway to describe a sequence of lysbilder (transparencies) intended for projection during a lecture or demonstration. The slides are usually shown with a slide projector or, in the case of overhead projection, with an overhead projector that shines light through the transparent image onto a screen. A lysbildeserie typically constitutes a coherent narrative or thematic set of images, often complemented by captions, diagrams, or brief notes.

The content and structure of a lysbildeserie emphasize progression. Each slide presents a single idea or image, and the order is arranged to support the speaker’s line of argument. Designers may mark slides with numbers or labels to aid navigation during a presentation. The sequence is designed for clear visual communication, with legible text and carefully chosen imagery.

Production and formats have evolved over time. Historically, lysbilder consisted of physical glass or plastic transparencies created from photographs or drawings, produced by cameras or printing processes, and stored in slide binders or boxes. With overhead projection, large type captions were common. The advent of 35 mm slide projectors introduced film-based slides, and later acetate-based slides and digitized images allowed easier duplication and reuse.

Usage and evolution: lysbildeser were a staple in classrooms, universities, and business presentations from the mid-20th century until the rise of digital presentation software. Today they are largely supplanted by computer-based slides, but may still be used in environments without access to digital equipment or for archival purposes, where slides are digitized for modern viewing.

Advantages and limitations: the method offers high visibility to large audiences and independence from computers, but is inflexible, time-consuming to produce, and dependent on functioning projection equipment. Damage to slides or projector failures can disrupt a presentation. In contemporary contexts, lysbildeserie remains a historical reference and can be preserved through digitization.