Development of temperature feedback control system for piezo-actuated display package

Jae Choon Kim, Jin Taek Chung, Dong Jin Lee, Yong Kook Kim, Jin Woo Kim, Sung Woo Hwang, Byeong Kwon Ju, Sang Kyeong Yun, Heung Woo Park

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper describes a temperature management system for a deformable mirrors of piezo-actuated display package (PADP). This package which is integrated in microbeam projectors is used in portable devices such as cellphones, laptops, and personal digital assistants (PDAs), to name a few. Ambient temperature change is a critical factor affecting the performance of PADP. To reduce this effect of ambient temperature change, a temperature control system using a microheater and a temperature feedback circuit is developed. A computational model of the transient thermal analysis for the feedback control system is also developed. The obtained theoretical results are in a good agreement with the experimental measurements. Under this controlled system, the magnitude of the temperature fluctuation is reduced by ±0.5 °C. In order to enhance the performance of the developed system, various values of the temperature sensor resistance are used, leading to a reduction of about 10% of the temperature fluctuation.

Original languageEnglish
Pages (from-to)213-219
Number of pages7
JournalSensors and Actuators, A: Physical
Volume151
Issue number2
DOIs
Publication statusPublished - 2009 Apr 29

Keywords

  • Deformable mirror
  • Display package
  • Microheater
  • Temperature control
  • Thermal analysis

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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