LCD Panel Training LCD Panel Training ManualManual

2008. 3. 15

VD R&D 4Lab.

ContentsContents

1. LCD Panel Structure &

Operation

2. LCD Panel Manufacturing

Process

3. Q&A

LCD Panel Structure & LCD Panel Structure & OperationOperation

LCD On/Off Theory LCD On/Off Theory

OFF ON

d=p/4

TN Mode TN Mode

Panel StructurePanel Structure

LCD ModuleLCD Module

BLUBLU

Gate(Al-Nd)Drain(Cr)

ITO Source(Cr)a-Si

G(gate)Cst (storage capacitance)

Drain(Cr)

Color Filter BM(Black Matrix)

Polarize plate

CLC

Cross section

LCD CellLCD Cell

T-con & Driver T-con & Driver

Gate D

river IC

Source Driver IC

Timing

Control IC

(Gate Array)

GraphicController

CPU

R(0:N)

G(0:N)

B(0:N)

R(0:N)

G(0:N)

B(0:N)

Hsync

Vsync

DE

MCLK

RGB(0:N)

Gate Clock

Start Vertical signal

analog data

Load signal

Start Horizontal signal

HCLK

Vcc

LVDS

Vcom Gamma Voltage

RVS/RVSB

DC/DC

AVdd

Von

Voff

AVdd

Output Enable

T-Con Block DiagramT-Con Block Diagram

Gate Driver IC Gate Driver IC

BUFFER

SHIFT

REGISTER

Carry in

Gate Clock

Carry out

Vcom

Von

Voff

out(1~n)

INPUT

CIRCUIT

CPV

U/D

OE1

OE2

OE3

STV

INPUT

CONTROL

Source Driver IC Source Driver IC

Shift Register

D/A Converter

Latch

R(0:N)

G(0:N)

B(0:N)

STH(Carry in)

DCLK

LOAD Signal(TP) Rising

Carry Out

V0

V1

Vn

Voltage follower outputLOAD Signal(TP) Falling

n channel

output

64 * 1

Decoder

64 * 1

Decoder

OP AMP OP AMP

Vcom Vcom

Data Data

L/R

LC Operation LC Operation

Gate line

Source line

Liquid crystal layer

storage capacitor

Cst액정 capacitor

Clc

Displayelectrode

Common electrode Vcom

Liquid crystal layer

storage capacitor

Cst액정 capacitor

Clc

Displayelectrode

Common electrode Vcom

Gate On Gate Off

Gate On Gate Off

When Gate is off, Ioff current leaks and Storage capacitor (Cst) is used for clamp the data voltage during Gate off-period

Data voltage

Vcom

Gate On Voltage

Gate Off Voltage

ΔV Voltage drop

LVDS InterfaceLVDS Interface

Timing Timing 628H

Vsync

Hsync

DE

4H 23H 600H 1H

Hsync

CLK

DE

DATA INVALID VALID

1056clk

128clk 88clk 800clk 40clk

RSDS InterfaceRSDS Interface

mini-LVDS Interfacemini-LVDS Interface

PPDS InterfacePPDS Interface

AiPi InterfaceAiPi Interface

Gamma correctionGamma correction

Panel Manufacturing Panel Manufacturing ProcessProcess

TFT Array ProcessTFT Array Process

Gate Insulation Layer (SiNX)

Gate electrode & Cs electrode

Glass Substrate

Gate electrode

Data pattern

Color Filter Array ProcessColor Filter Array Process

Glass Substrate (Depth 0.7mm)

Common Electrode

Over Coat

Color Filter Pixel DesignColor Filter Pixel Design

LC Cell ProcessLC Cell Process

Pixel electrode (ITO)

Common electrode (ITO) Polarizer

PI Layer

Polarizer

TFT-Array Glass

Color filter Glass

LC

PI Print ProcessPI Print Process

Alignment Layer

Move

Alignment Layer

(T<100 Å)

PI Mask

Seal Print ProcessSeal Print Process

Alignment Layer

Alignment Layer

Seal pattern

Seal pattern

TFT Array Substrate

TFT-Array Substrate

Short Dispense ProcessShort Dispense Process

TFT Array Substrate

Common Electrode Alignment Layer

Seal pattern

LC Injection

Color filter Substrate

Spacer ProcessSpacer Process

Color filter Glass Color filter Glass

LC Drop Filling ProcessLC Drop Filling Process

Cell Scribe & Break ProcessCell Scribe & Break Process

LCD Panel

Polarizer Attachment Polarizer Attachment ProcessProcess

LCM ProcessLCM Process

Output

COG & TABCOG & TAB

TCP Bonding ProcessTCP Bonding Process

Handling Handling CautionsCautions

☞ Do not twist & bend on the module.

☞ Refrain from strong mechanical shock or any force to the module.

☞ Do not press or scratch the surface harder than a HB pencil lead.

☞ Wipe off water droplets or oil immediately

☞ When the surface of polarizer is dirty, Clean with IPA, Hexane.

☞ Do not use Acetone, Ethyl alcohol & Keton type materials.

☞ Protect the module from the electro-static discharge.

☞ When the module is assembled in the set, Use finger rubber.

☞ Do not adjust the variable resistor.

☞ Do not store the TFT-LCD module in the direct sunlight.

☞ Power off, When you connect or remove the module.

Thank You !Thank You !