US 7513672

Patent Overview — US7513672B2

Title: Light emitting panel assemblies
Inventor: Jeffrey R. Parker
Original Assignee: Solid State Opto Ltd (current assignee listed: Rambus Delaware LLC)
Application No.: US12/164,315 | Filed: 2008-06-30 | Granted/Published: 2009-04-07
Priority date (as listed): 1995-06-27; a priority claim from US09/256,275 dated 1999-02-23 is also noted
Legal status (as listed): Expired – Fee Related; anticipated expiration 2015-06-27

Purpose and plain-language scope (from the supplied excerpt):
The patent concerns light emitting panel assemblies built around light guides — "planar or of plate-like form" — that distribute light from a source coupled into the guide. The excerpt's classification entries and prior-art keywords ("light," "assembly," "panel member," "panel," "light emitting") indicate the subject matter covers: coupling light from a source into the panel (including shaping the guide, e.g., collimating, focussing or diverging surfaces, and housing at least part of the light source in holes or recesses); redirecting light at the guide surface; and coupling light out via prisms, protrusions, indentations, roughened surfaces, or linear/arc-shaped grooves extending over the guide's length or width. Multi-source arrangements (e.g., multi-colour sources) and tapered light guides are also classified, as is a surgical-field illumination application using white LEDs.

Source: https://patents.google.com/patent/[US7513672](/patent/US7513672)/en

What the excerpt does not establish:
The supplied text is largely bibliographic, classification, and legal-status data; the claims, written description, and drawings are not included. Therefore this overview cannot state the actual claimed scope, the number or wording of claims, specific embodiments, or the precise technical relationships among the classified features. The excerpt also contains no prior-art references or comparative analysis, so no statement is made about novelty or prior art, and per instruction no litigation, ownership-transfer, or validity analysis is offered. Dates, assignees, and status are reproduced as listed and are described in the source itself as assumptions or non-legal conclusions.