Post on 25-Mar-2022
2.4Gbps Test Infra Evaluation
Product & Test Engineering Team
System LSI Foundry Team
Samsung Electronics Co., LTD.
대형 LCD Module 구조
I. 중대형(Monitor&Notebook, LCD-TV)
Source PCB
Gate Signal
Gate LDI
(COF)
Source PCB
Gate PCB
TFT-LCD Panel
Gate Drive IC
Source Drive IC
1. TFT-LCD Panel ; 개개의 화소에서 빛을 제어하여 화상을 표시
2. Drive IC : TFT-LCD Panel에 화상신호 전달
3. PCB : 구동회로 실장 및 Drive IC에 신호 전달
4. Backlight Unit : CCFL의 선광원을 면광원으로 변환하여 Panel에 조사
5. Inverter : CCFL을 구동시키기 위한 AC 고전압 발생
TFT-LCD 회로구성
T-conDC/DC
Gamma Vcom
LCD Panel
Gray Scale Voltage & Vcom
Control SignalLVDS
Tx
RGB Data & Clock
LVDS
Rx
Timing
Controller
R
G
B
Vsync
Hsync
Control
Graphic
ControllerSource Driver
DC-DC
Gamma
Vcom
GUI
. . .Source Driver
TTL
3.3V
Ga
te D
rive
r IC’s
(340mV)
LVDS Input(Low EMI Bus)
Analog Part
Digital Part
LDI Frequency Increase Trend
■ Source Dirver IC 의 동작 주파수 상향 원인
1. 화면 대형화 : LCDPIN 상향
2. Frame 주파수 상향
3. DATA Line 축소 (Interface 변경)
4. LCD Driver IC의 개수 축소
Frequency (Gbps]
3
2.5
2
1.5
1
0.5
0’08.2H ’09.1H ’09.2H ’10.1H ’10.2H ’11.1H
mLVDS (660Mbps)
AiPi (~930Mbps)
Next IP : 2.4Gbps10’ Mon10
AiPi+ :1.6Gbps10’Mon07
Plan
Action
AiPi+ :1.6Gbps10’Mon01
2.4Gbps ATE & P/C Evaluation 검토
2.4Gbps Probe Card 2.4Gbps ATE
ATE Module - β-HSIF
Date 10’01/25 Done
Eval Device 1. S6CR042 (1.65Gbps Target)
ImprovementPoint
1. Needle2. MCW Shield3. PCB
1. Signal Waveform Measure2. 제품 평가
Waveform Measure
Evaluation Result - Real : 2.6Gbps
HSIF > Set Module(Max 2.1Gbps]
HSIF Waveform 측정Probe Card 주파수 특성 측정 결과
Probe Card / HSIF 측정결과
Waveform @2.5 Gbps
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
10 100 1000 10000Fr equency [MHz]
Gain
[dB
]
Jitter
Std Dev:18.2ps
Pk-Pk:108ps
100ps/div
200mv/div
100ps/div
50mv/div
200mv
주파수특성 S21
Jitter
Std Dev:19.2ps
Pk-Pk:106ps
1000mv
제품평가결과
SHM_VDD1_FREQ [DVO SHM]VDD2=15.50VVAMP=300mV1.25000GHz |...............................1.22500GHz |...............................1.20000GHz |...............................1.17500GHz |...............................1.15000GHz |...............................1.12500GHz |...............................1.10000GHz |...............................1.07500GHz |...............................1.05000GHz |.................P.............1.02500GHz |...............PPPPPPPPPPPP....1.00000GHz |..............PPPPPPPPPPPPPPPPP975.000MHz |..............PPPPPPPPPPPPPPPPP950.000MHz |.............PPPPPPPPPPPPPPPPPP925.000MHz |.............PPPPPPPPPPPPPPPPPP900.000MHz |.............PPPPPPPPPPPPPPPPPP875.000MHz |............PPPPPPPPPPPPPPPPPPP850.000MHz |............PPPPPPPPPPPPPPPPPPP825.000MHz |............PPPPPPPPPPPPPPPPPPP800.000MHz |...........PPPPPPPPPPPPPPPPPPPP775.000MHz |...........PPPPPPPPPPPPPPPPPPPP750.000MHz |...........PPPPPPPPPPPPPPPPPPPP725.000MHz |..........PPPPPPPPPPPPPPPPPPPPP700.000MHz |..........PPPPPPPPPPPPPPPPPPPPP675.000MHz |.........PPPPPPPPPPPPPPPPPPPPPP650.000MHz |.........PPPPPPPPPPPPPPPPPPPPPP625.000MHz |........PPPPPPPPPPPPPPPPPPPPPPP
------------------------------- vdd11111112222222222333333333344444...............................4567890123456789012345678901234
HSIF VDID =300mV
HSIF @1.65GbpsModule Wave Form
(Eye open<0.60UI)
8Bit 966Ch. 2.1Gbps
HSIF > Set Module : Eye Diagram 으로 확인한 Waveform 우수