Browse Prior Art Database

Multistage Light Guide

IP.com Disclosure Number: IPCOM000213394D
Original Publication Date: 2011-Dec-13
Included in the Prior Art Database: 2011-Dec-13
Document File: 2 page(s) / 137K

Publishing Venue

Siemens

Related People

Juergen Carstens: CONTACT

Abstract

There are many products, which provide colored light emitting devices to signal the status of the equipment or other parameters. These status indicators ordinarily are located on the outside of the unit to ensure that user can clearly identify them. Normally, the light emitting components are mounted onto a circuit board inside the casing of the unit, not conveniently placed close to the indicator in the casing. In some situations the indicator’s position may even be on a part of the unit which is separate from the part containing the circuit, in order to ensure access to the light emitters for installation or maintenance

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Multistage Light Guide

Idea: Richard Kenney, GB-Congleton

There are many products, which provide colored light emitting devices to signal the status of the equipment or other parameters. These status indicators ordinarily are located on the outside of the unit to ensure that user can clearly identify them. Normally, the light emitting components are mounted onto a circuit board inside the casing of the unit, not conveniently placed close to the indicator in the casing. In some situations the indicator's position may even be on a part of the unit which is separate from the part containing the circuit, in order to ensure access to the light emitters for installation or maintenance. For that reason, light guides are used to allow the light emitters to be positioned remotely from the point of display. Light guides use total internal reflection to transmit light along their length, even around corners, to the point where it is required. In the case that the indicator is located on a removable section of the unit, the light guides may be fitted to either the side containing the light emitters or the side containing the indicator position. Thereby, the entire single stage light guide stays in the corresponding section of the unit, which makes it mechanically vulnerable while the parts are separated.

In the following it is proposed to adopt a multistage light guide that allows flexible positioning of the light emitters relative to the indication position, as depicted in...