Liquid crystal displays (LCDs) have been widely used in the information technology such as LCD-TV, LCD monitor, laptop computer and mobile phones. Because liquid crystal does not emit lights by itself, a backlight source should be needed in order to produce viewable images on a LCD. The module which provides the light source is usually called ¡¥¡¥backlight module (BLM)¡¦¡¦ and a cold cathode fluorescent lamp (CCFL) is used as the light source, which is placed behind the panel of the LCD.
Due to the temperature increase of the CCFL in a BLM of a LCD subjected to lighting state, micro-deformation will occur in the BLM and result uneven luminance phenomena. The purpose of this research is to study the effects of heat source from CCFL on luminance in the BLM of a 7-inch LCD. The temperature distributions are measured by using thermal couple and the luminance variations of the BLM are measured by using luminance meters and CCD camera. The results show that the luminance distribution is more even because of the heat source from CCFL in BLM.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0116107-172614 |
| Date | 16 January 2007 |
| Creators | Tsai, Chi-tsung |
| Contributors | none, none, none, Chi-Hui Chien |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116107-172614 |
| Rights | restricted, Copyright information available at source archive |
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