Title page for etd-0717109-114022


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URN etd-0717109-114022
Author Hui-chi Wang
Author's Email Address m963020010@student.nsysu.edu.tw
Statistics This thesis had been viewed 5364 times. Download 4018 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2008
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title SMD Type Metallic Reflection Cup LED Component on the Application of Backlight Module
Date of Defense 2009-06-24
Page Count 183
Keyword
  • Uniformity
  • Reflection cup
  • LED
  • Backlight module
  • Abstract Nowadays, using the LED as backlight module's light source becomes generalization gradually, and the application of LED light source develops from the liquid crystal display to the liquid crystal TV. However, thermal dissipative problem of LED component is still an important issue to study presently, since it can affect the service lives of LED and LCD seriously. In order to increase the luminous energy of the LED component, one need to increase the supply of electric power and it will cause the increment of thermal dissipative problem of the LED component also. Therefore, by considering the LED components as the light source of the backlight module , the purpose of this study is to reduce number of the required LED components in order to decrease the thermal dissipative problem of LEDs, and maintain the luminous and uniformity of the backlight module simultaneously.
      A new packaging for LED, named SMD type metallic reflection cup LED component, was proposed in this study. The new LED package not only has a better thermal dissipative property, but also can control its radiation property by changing the angle of its reflection cup. So, the proposed LED package can be applied for different purposes. By applying the proposed LED components as the light source of a backlight module, under the condition of same illumination, it can be shown that the required number of LED components can be decreased tremendously and so the thermal dissipative problem can be decreased too. Also, the numerical simulated results showed that by choosing the suitable angle of the reflection cup, the uniformity of the backlight module can be improved.
      Besides, this study proposed a modified method for assessing the uniformity of a backlight module. The simulated results showed that the proposed method can assess the uniformity of a backlight module more suitable than the traditional nine points measurement method can do.
    Advisory Committee
  • Ting-Nung Shiau - chair
  • Jung-Hung Sun - co-chair
  • Chung-Ting Wang - co-chair
  • Chi-Chang Hsieh - co-chair
  • Chi-Hui Chien - advisor
  • Files
  • etd-0717109-114022.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2009-07-17

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