Welcome to LG LCD TV LE-15A10 Europe LL-15A10 Canada CIS China Middle-East Taiwan Philippines Asia Africa LT-15A10 America Austria 1
Contents 1. LCD Technology 1) What is TFT LCD ? 2) Structure of TFT LCD 3) TFT-LCD Operating Mechanism 4) Operating Theory 5) Structure LCD Module 6) Structure of Back light 7) Function of Back light 8) Key Parts ; Color Filter, Polarizer 2. LCD Market Trend (1) Comparison with other Display devices (2) World Display Market Trend (3) LCD TV Market trend (4) Guidance of handling LCD product (5) Abbreviations 3.
1.
What is TFT(Thin Film Transistor)? TRANSISTOR TFT (MOS-FET) DRAIN DRAIN Vth Vth GATE GATE SOURCE SOURCE TPE When supply over certain voltage(Vth) to the GATE, it delivers information from Drain to Source SWITCHING Characteristics Compound Transistor with thin film in every Pixel on ITO.
Structure of TFT- LCD 300 ㎛ (Approx....
TFT- LCD Operating mechanism The structure of TFT-LCD is that Liquid Crystal is being filled between C/F Glass & TFT Glass. One Pixel consists of 3 sub-Pixels(R,G,B) and according to the number of the pixels, Display Resolution (SVGA,XGA,etc) is determined. The TFT Matrix consists of Data Line(Carrying display data signal),Gate Line(Carrying signal for turn On/Off the TFT).
Operating Theory (Braun Tube : Light Emitting Component) (TFT-LCD : Non-Light Emitting Component) COLOR FILTER GLASS Anode Grid 4 Grid 1 Polarizer Glass Panel Polarizer Flourescent HEATER Grid 3 Liquid Crystal Green Beam Luminous Source Light(White) Grid 2 Electronic Gun Deflection Section Vacuum TFT+Electrode Electrode 7
Structure of LCD Module LCM = Case top + LCD panel B/L Assy + Plate Case Top ① LCD Panel ② ③ Diffusers & Prisms Back light Assy Light Guide Reflector Lamp Housing Lamp D-IC(on TCP) PCB Support Main ④ Bottom Plate Bottom Cover 8
Structure of LCD Module Driving Circuit Bright Data Driver IC Printed PCB Board Common Electrode R Dark Gray G Gate Driver IC B Inverter Dn-1 Pixel Array & Wiring Dn Dn+1 LC Pixel Electrode Polarizer CF Panel LC Panel LC Power Supply for Video Signal Lamp TFT Panel Polarizer Lamp Prism Diffuser Light Guide Lamp Inverter B/L Unit Reflector 9
Structure of Back Light Unit Pad Diffuser(Protector) Top Prism Bottom Prism Diffuser Light Guide Reflector Supporter main Lamp Ass’y Screw Lamp Housing Plate 10
Function of Back Light Function on each part Structure of Back Light LCD PANEL Diffuser (Protector) Top Prism Display the light controlled by data signal Same structure as bellow diffuser, Protect the top prism Same function as bottom prism, Increase the luminance up to 1.33 times of bottom prism Bottom Prism Concentrate the light and increase the luminance up to 1.
Key Parts : Color Filter To realize color of the Display, array Red,Green & Blue color paint beneath Upper Glass Panel regularly in accord with Pixel electrode of lower Glass Panel.
Key Parts : Polarizer A kind of filter, which polarize light one direction.
Key Parts : Back Light Back Light Unit,located behind TFT-Panel lower Glass, and supplies light to the PANEL. CCFL LAMP (Cold Cathode Fluorescence Lamp) LAMP Can realize White Light Long life time(Appr.
Key Parts : Drive IC Supplies the signal from PCB to TFT-PANEL TCP TYPE DRIVER IC (Tape Carrier Package) DRIVER IC GATE DRIVER IC(8EA) : Horizontal Supplies signals from Data line to the Gate of TFT-PANEL sequentially. Each IC controls 128 lines in horizontal. SOURCE DRIVER IC(5EA) : Vertical Supplies the Pixel Data from SOURCE to each Pixel when the Gate of TFT PANEL ON. Each IC controls 154 lines in vertical.
2.
Comparison with other Display devices Large Screen Over 40” C P T Basic Functions Full Color Contrast Brightness Resolution View Angle Response Time Normal Flat LCD PDP* VFD** *PDP : Plasma Display Panel **VFD : Vacuum Flourescent Display : Very Good(Possible to realize) : Good(Hard to realize) : Bad(Impossible to realize) 17
World Display Market Trend 60” Projector 50” P D P 40” 30” LCD CRT Market 1 20” Market 3 LCD 10” LCD Market 2 Small AV System NTPC*** Monitor Large AV System NTPC : NoteBook PC 18
World Market LG LCD TV Market Trend World Market LCD TV K Volume 7000 6000 5000 4000 3000 2000 1000 0 7000 4000 2000 250 2000 500 2001 1000 2002 2003 2004 2005 Years Source : IDC JAPAN 19
Guidance of handling Color TFT LCD Module Color TFT LCD Module is very sensitive both electrically and physically.Users, therefore, are requested to follow the “Guidance of handling color TFT LCD Module” on the followings. 1 Be careful not to make scratch on the polarizer. - Surface of polarizer is soft and can be physically damaged easily. - Please do not touch, push or rub polarizer surface with materials over HB hardness. 2 Keep clean the surface.
Abbreviations Abbreviations on LCD Module and TV No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Terms ACF B/L CCFL CF CR FPD LC LCD LCM LD MNT POL Pixel TAB TCP TFT Full Description Anisotropic Conductive Film Back Light Cold Cathode Fluorescent Lamp Color Filter Contrast Ratio ( White / Black ) Flat Panel Display Liquid Crystal Liquid Crystal Display Liquid Crystal Module Line Defect Monitor Polarizer Picture Element Tape Automatic Bonding Tape Carrier Package Thin Film Transistor 21
LG LCD TV 1) General Specification - Key Value - Specifications - Monitor Features - Unique Features 2) Presentation for SVC Engineer - Specifications - Exploded View - Interconnection Guide - Block Diagram - IIC Adjustment - MICOM Pinning & Descriptions - Video Processing - Audio Processing 22
General Specifications Key Value LE/LL/LT-15A10 KEY VALUE -. Great Design . Modern Style . Slim . Free space -. Dual Functionality . Computer Monitor Up to XGA 1024X768 85Hz . Independent TV Receiver -. High-Tech . LCD . HD Compatible . Component Input(Optional)-ME .
General Specifications PC Input Monitor Features 1. Connect the signal cable from the monitor out socket of the personal computer to the input socket of the set. 2. Connect the audio cable from the PC to the Audio socket of the set. 3. Press the TV/AV/PC button to select PC Mode 4. Switch on the PC Mode, and the PC Screen automatically appears on the set. The set can be operated as the PC monitor. Note : 1.
General Specifications Unique Feature Soft Touch Control Soft Touch control system, LG’s advanced technology, leads customers to the emotional satisfaction. Its main characteristics are Anti-static function when touching besides softness & luxurious looking.
Specifications Presentation for SVC Engineer SYSTEM PAL/SECAM-B/G, SECAM-L/L’ LL-15A10 PAL/SECAM-B/G,D/K, PAL-I LE-15A10 PAL/SECAM-B,D,I, NTSC,4.
MAIN PCB INVERTER Connector between Main PCB and LCM CONTROL PCB SPEAKER (R) 27
Interconnection Guide Presentation for SVC Engineer CN2 I n v e r t e r CN1 LCD Module CN3 P502 P801 Main PCB P601 To SPK P401 P602 P001B Control PCB 28
Adjustment in SVC mode Presentation for SVC Engineer “SVC” key, or “OK” +”OK” SVC mode ADJUSTMENT mode “YELLOW” key ◈ OPTION Part RD GD BD RO GO BO S-B PC CP 80 80 80 32 32 32 23 3 200PR TEXT I II SA TOP SCART A2 ST SYS Average ADJ.
OPTION - 1 OPTION CODE 200PR TEXT I II SA 0 1 OPTION - 2 FUCTION REMARK OPTION CODE 100 PROGRAM 200 PROGRAM Only China without TXT ACMS A2 ST SYS Channel Name Memory Except AUSTRALIA 1 TEXT 0 Slow VOLUME Change Normal Curve 0 DUAL I 1 Steep VOLUME Change Rushed Curve 1 MODE SAVE 0 W/O BLUE BACK 0 No TOP TEXT 1 With BLUE BACK 1 TOP TEXT 0 ENG Only 0 W/O SCART 1 EU-5EA 1 WITH SCART 2 EU ETC 0 NO A2 STEREO 3 FARSI 4 ARAB URDU VOL BBACK LANG 1 A2 STEREO 0 11
Presentation for SVC Engineer 3.3V 5V SCL1 SDA1 V V Addr.
MICOM Pinning & Descriptions Presentation for SVC Engineer SCL0 1 52 MX-CS SDA0 2 51 MX-DA SCL1 3 50 A-MUTE SDA1 4 49 MX-CK FS 5 48 KIN4 SW1 6 47 RGB SW SW2 7 46 S-DET AV-ID 8 45 INV_BRT VDD2.5 9 44 VDD3.3 VSS 10 43 VSS VDD3.3 11 42 VDD2.5 CVBS 12 41 FB VDDA2.5 13 40 B VSS 14 39 G KIN1 15 38 R KIN2 16 37 VDDA2.
Function No Symbol 1 2 SCL0 SDA0 .IIC Control with EEPROM 3 4 SCL1 SDA1 .IIC control with other Devices(TUNER,VPC3230,MSP3410,etc) 5 FS 6 7 SW1 SW2 8 AV-ID 9 VDD2.5 10 VSS 11 VDD3.3 .Voltage Supply(3.3V) 12 CVBS .Composite video signal input for TXT process 13 VDDA2.5 .Voltage Supply for Analog circuit .Factory Service mode(Data control during production) .TUNER System control signal BG/I/DK NTSC-M B/G SECAM-L SECAM-L’ SW1 H L L H H SW2 L H L L H .
Function No Symbol 18 AFT 19 20 Hsync_TV Vsync_TV 21 22 KOUT1 KOUT2 .Signal Output to Soft Touch panel 23 26 VS_PC HS_PC .Check the signal 100msec interval for PC signal 24 IR 25 B/SND .Beeper Sound output to Soft Touch PCB 27 M-PWR .Main Power Control 28 INV-PWR .AFT signal input .H-Sync & V-Sync for TXT position from VPC3230 .Remocon signal input .Inverter Power control 29 VSS .Ground 30 VDD3.3 .Voltage Supply(3.3V) 31 AD-PD .Power control for AD9884(IC201).
Function No Symbol 34 35 XOUT XIN .Main crystal(6MHz) connection for MICOM operation 36 VSS .Ground 37 VDDA2.5 .Voltage Supply(2.5V) 38 39 40 R G B .Teletext R,G,B signal output 41 FB .Fast Blanking signal for Teletext 42 VDD2.5 43 VSS 44 VDD3.3 .Voltage Supply(3.3V) 45 INV_BRT .Brightness control to Inverter(PWN control) 46 S-DET .SCART FB signal input from 16 pin for Auto AV function 47 RGB SW .Control RGB switching IC 48 KIN4 .
No Symbol Function 50 A-MUTE .Sound Mute control when Channel up/down, Mode change & Power on/off. 51 52 MX-DA MX-CS .
C7 C6 C5 C4 VSUPC GNDC C3 C2 C1 C0 GNDSY VSUPSY INTLC AVO FSY/HC MSY/HS VS Video Processing - VPC3230D FPDAT VSTBY CLK5 NC XTAL1 XTAL2 ASGF Presentation for SVC Engineer 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 GNDF VRT I2CSEL ISGND VSUPF VOUT CIN VIN1 VIN2 VIN3 65 66 40 39 67 68 38 37 69 36 70 71 35 34 72 73 33 32 VPC3230D 76 77 29 28 FB1IN 78 79 27 26 AISGND 80 25 Y1 Y2 Y3 VSUPY GNDY Y4 Y5 Y6 Y7 GNDLLC VSUPLLC LLC1 LLC2 VSUPPA GND
Presentation for SVC Engineer Video Processing - VPC3230D 1. Features Video Decoding - 4 Composite inputs, 1 S-VHS input - Composite video & sync output - integrated high-quality A/D converters - Adaptive 2H comb filter Y/C separator - 1H NTSC comb filter - Multi-standard color decoder(1 Crystal) - Multi-standard sync decoder - Black line detector Video Decoding - Horizontal scaling(0.
Block Diagram CIN1 VIN1 Adaptive Comb Filter Analog Front End Color Decoder VIN2 NTSC, PAL, SECAL VIN3 VIN4 AGC, 2*ADC FB RGB/ YCbCr Y/G ANALOG Component Front-End Saturation Tint MIXER 2D Scaler PIP Panorama Mode Contrast Brightness Peaking Output Formatter U/B ITU-R 656 ITU-R 601 YCOE Memory Control FIFO CNTL Y LL Clock FB Cr Matrix Contrast Saturation Brightness Tint SYNC + Clock Generation Cb FB Y OUT CrCb OUT I2C BUS V/R 4 x ADC Processing Cr Cb NTSC PAL VOUT RGB/ YCbC
Presentation for SVC Engineer Pin Pin Name No. Type Connection (if not used) Short Description Video Processing - VPC3230D Pin Pin Name No.
Presentation for SVC Engineer Video Processing - VPC3230D Pin Pin Name No.
NC NC AHVSS AHVSS NC SC4_IN_L SC4_IN_R ASG4 SC3_IN_L SC3_IN_R ASG2 SC2_IN_L SC2_IN_R ASG1 SC1_IN_L SC1_IN_R VREFTOP NC MONO_IN AVSS AVSS NC NC AGNDC Audio Processing - MSP3440G Presentation for SVC Engineer 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 AVSUP AVSUP 65 66 40 39 CAPL_M AHVSUP ANA_IN1+ 67 68 38 37 CAPL_A SC1_OUT_L 69 70 36 35 SC1_OUT_R 71 72 34 33 SC2_OUT_L ANA_INANA_IN2+ TESTEN XTAL_IN XTAL_OUT TP MSP3410D AUD_CL_OUT NC 74 3
Audio Processing - MSP3410D Presentation for SVC Engineer Pin Pin Name No. Type 1 NC 2 I2C_CL IN/OUT 3 I2C_DA 4 Connection (if not used) LV Short Description Pin Pin Name No.
Audio Processing - MSP3440G Presentation for SVC Engineer Pin Pin Name No. Type Connection (if not used) Short Description Pin Pin Name No. Type Connection (if not used) 51 GND SY SUPPLYD X Ground, Sync Pad Circuitry 72 XTAL_OUT OUT 52 V SUPSY SUPPLYD X Supply Voltage, Sync Pad Circuitry 73 TP LV Test pin 53 INTLC OUT LV Interlace Output 74 AUD_CL_OUT OUT LV Audio clock output(18.
LCD Monitor Controller - MX88L284 Presentation for SVC Engineer Features • Converts NTSC/PAL and PC video signal into flat panel display device timing and resolution • Provide full frame buffer, reduce frame buffer and frame buffer less optional architecture.
