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林 Dr. Chia-Feng Lin Department of Materials Engineering National Chung Hsing University Phone: 04-22840500#706 E-mail: cflin@dragon.nchu.edu.tw - 1 a-si TFTs Color filter TFT substrate Polarizer Backlight Diffuser Polarizer - 2

- 3 Conceptual diagram of a TFT LCD panel - 4

TN LCDs 理 ( 90 度 ) 列行列利 - 5 + 稜 CCFL - 6

料力理利理利來理 print SiO2 TiO2 度類 printless pattern 度 10-7 狀 - 8

LED Light Source - 9-10

狀降度料力流不料稜 - 11 GE Plastics Optical Lexan PMMA Melt Flow Index 13 N/A HDT 130 deg. C 95-98 deg. C Impact Strength Excellent Poor Dimensional Stability Good Poor Water Absorption 0.15% 0.3% Light Transmission 89-90% 92-93% UV Stability Fair Good CCFL UV-cut (suggested) Conventional Density 1.2 1.2-12

料率 100 Top Transmissive Ratio (%) 90 80 70 60 visiable light Bottom 50 100 200 300 400 500 600 700 800 900 1000 Wavelength 率量 Top: bottom: - 13 稜率率 CCFL - 14

稜度率度稜稜來度稜度 - 15 (diffuser) 稜 (prism lens) (diffuser) (LGP) 冷 (CCFL) (patterns;elements) (reflector) - 16

(LGP) (diffuser) 行 (patterns;elements) 1. 2. 度 3. pattern - 17 PET or LENS LENS LENS - 18

異 PET,PC PET,PC HAZE 率 HAZE 說 HAZE,,, - 19 TSUJIDEN 度量度度度 KIMOTO 度量 75PBA PET : 75LS PET 80 度 C 500 75MXE PET : 75SXE PET 20 度 C 500 100PBU PET : 100S PET 60 度 C 95%RH 500-20

稜亮料度 µ µ 狀列亮度兩亮度 - 21 稜 - 22

稜 - 23 Two BEF crossed Two BEF crossed One BEF - 24

稜 - 25 稜 - 26

New BEF ( 金 ) - 27 兩不 - 28

Front Light for Reflective LCD - 29 Front Illumination Device and Reflective-Type LCD Patent : US06048071 Sharp - 30

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冷 (CCFL) (White LED) Emission Intensity (arb. units) 0.0010 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 0.0000 CCFL Spectrum -0.0001 300 350 400 450 500 550 600 650 700 Wavelength (nm) Emission Intensity (arb. units) 0.0010 0.0009 0.0008 0.0007 0.0006 0.0005 0.0004 0.0003 0.0002 0.0001 0.0000 LED Nichia-440 I L =20mA, V L =3.5V 300 350 400 450 500 550 600 650 700 Wavelength (nm) - 35 C.I.E Chromatically Diagram - 36

濾 CCFL - 37 Transmittance (a.u.) 0.15 0.12 0.09 0.06 0.03 1(a) Lower White Blue Green Red Y 1.0 0.8 0.6 0.4 0.2 1(c) Standard NTSC Low CF (32.75%) High CF (48.10%) CIE Curve 0.00 350 400 450 500 550 600 650 700 750 800 0.15 0.12 0.09 0.06 0.03 1(b) Wavelength (nm) 0.00 350 400 450 500 550 600 650 700 750 800 0.0 0.0 0.2 0.4 0.6 0.8 濾度 X 利參量濾度度度濾 - 38

0.10 0.08 0.06 0.04 0.02 0.00 350 400 450 500 550 600 650 700 750 800-39

EL Intensity (a.u.) 0.006 0.005 0.004 0.003 0.002 0.001 White BY-LED Low 50mA 40mA 30mA 20mA 15mA 10mA 5mA 0.000 350 400 450 500 550 600 650 700 750 800 0.006 Wavelength (nm) 0.005 0.004 0.003 0.002 0.001 0.000 350 400 450 500 550 600 650 700 750 800-41

濾 Y 1.0 0.8 0.6 0.4 0.2 Standard NTSC Low CF (32.75%) High CF (48.10%) CIE Curve NTSC Ratio (%) 70 60 50 40 30 High NTSC CF Low NTSC CF 0.0 0.0 0.2 0.4 0.6 0.8 X 20 0 10 20 30 40 50 60 Currnet (ma) Blue LED 濾濾度兩藍濾濾 NTSC ratio LED NTSC 48.10%( NTSC Ratio) 濾 NTSC 立 ratio (55%, 料 20mA) - 43 0.020 0.015 0.010 0.005 EL Intensity (a.u.) 0.002 0.001 White UV-RGB 50mA 40mA 30mA 20mA 15mA 10mA 5mA 0.000 350 400 450 500 550 600 650 700 750 800 0.000 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) - 44

EL Intensity (a.u.) 0.002 0.001 White UV-RGB 50mA 40mA 30mA 20mA 15mA 10mA 5mA EL Intensity (a.u.) 0.002 0.001 Blue UV-RGB 50mA 40mA 30mA 20mA 15mA 10mA 5mA 0.000 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) 0.000 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) EL Intensity (a.u.) 0.002 0.001 Green UV-RGB 50mA 40mA 30mA 20mA 15mA 10mA 5mA 0.002 0.001 0.000 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) 0.000 350 400 450 500 550 600 650 700 750 800 850-45

論流藍流率濾度濾度濾濾濾度度 - 47 CCFL (3 band for white light) - 48

Light Emitting Diode With Light Source Patent : US05851063 General Electric Company Photo Type (mm) Product Number Luminous Intensity (cd) Typ. Forward Voltage Vf (V) Max. Directi vity 2 ½ (degree) Mounti ng Use 5 NSTM 515AS B G R 0.13 0.60 0.18 3.6 3.5 1.9 4.0 4.0 2.4 Display 80 Flow etc. - 49 EL Intensity (a.u.) 50mA 45mA 40mA 35mA 30mA 25mA 20mA 15mA 10mA 05mA 300 400 500 600 700 800 900 wavelength 300 400 500 600 700 800 900-50

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