Activity Number
253
Not Editable
Overview and Learning Objectives
Assessment
Central Concepts
Macro Micro Link
Activity Credits
Requirements

Liquid Crystals: LCD Displays (a 6-page activity for community college students by Dan Damelin)

Interactive, scaffolded model

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Overview and Learning Objectives

Students discover the unique nature of liquid crystal molecules, effectively another state of matter, and how they behave in electric fields. They experiment with the effect of polarity of crystals, and the intensity and direction of electric fields on liquid crystals.

Students will be able to:

• explain how a liquid crystal relates to other states of matter;

• draw or describe the behavior of liquid crystals in an electric field;

• give an overview of how an LCD panel works.

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Assessment

http://www.concord.org/~barbara/workbench_web/pdf/LCD_assessment8.07bt.pdf

A version of this assessment is found in the Activity section of Molecular Workbench.

Rubric for scoring:

http://www.concord.org/~barbara/workbench_web/pdf/LCD_assesmentRubric8.07bt.pdf

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Central Concepts

Key Concept:

Molecules of a particular shape and charge, called liquid crystals, have unique optical properties that have proven useful in recent manufacturing processes.

Additional Related Concepts

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Macro Micro Link

Links are made from molecules with particular properties to liquid crystal displays in computer monitors and flat panel televisions, thermometers, and even mood rings.

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Activity Credits

Created by CC: Molecular Literacy using Molecular Workbench + Pedagogica

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Requirements

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NSF Logo
These materials are based upon work supported
by the National Science Foundation under grant numbers
9980620, ESI-0242701, EIA-0219345, DUE-0402553, and 0628181.

Any opinions, findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.