Effect of BLU Ingredient on Electrical and Optical Properties of Light Diffusing Film used for TFT-LCD TV

백라이트 유니트 구성요소가 TFT-LCD TV용 광확산필름의 전기, 광학적 특성에 미치는 영향

  • 안철흥 (인하대학교 화학공학과) ;
  • 김건중 (인하대학교 화학공학과)
  • Received : 2006.05.09
  • Accepted : 2006.07.11
  • Published : 2006.08.10

Abstract

We have investigated the effect of each ingredient in the light diffusing film (LDF) which was used as backlight unit (BLU) of TFT-LCD TV on physical, electrical, thermal and optical properties of LDF. In anti-blocking layer, the excellent anti-blocking ability was obtained when 0.5~1.5 wt% of acrylic bead was added, and good decay-time and water-stability were shown when 0.8 wt% of tertiary ammonium salt was added. Optimal results for adhesion strength, curing rates and flexibility on the surface of PET film have been obtained in the light diffusing layer by using acrylic polyol as a binder resin, and by addition of 30~35 wt% non-yellowing type HDI crosslinker. In addition, the highest normal luminance value was obtained by addition of 250 wt% poly-dispersive polystyrene ($20{\mu}m$ PS) and polymethylmethacrylate ($20{\mu}m$ PMMA) beads into the binder resin (100 wt%). The higher normal luminance could be got for PMMA beads than PS beads because of the transmittance difference.

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