平面顯示器電子系統設計技術要項

平面顯示器• 電漿 (Plasma)

• 背投 (Rear Projection)– 液晶穿透式– 微機電反射式– 矽上液晶反射式

• 液晶 (LCD)

LCD TV 是未來的明星工業

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

Picture Quality Factors

• Brightness• Contrast• Color• Sharpness• Viewing Angle• Response Time• Uniformity• Jaggy• Jerky

A Typical Picture Specification

• Screen Size : 30" (76 cm)• Visible Screen Size : 75 cm (29,53”)• Display : LCD WXGA Active Matrix TFT

technology• Resolution 1280x768 (x3) pixels• Response time LCD : 16 ms• Brightness : 450 cd/m2

• Contrast Ratio : 350:1• Viewing Angles : 176H/176V• Anti Reflex Coated Screen

Brightness

More backlight

Contrast

Whiter and blacker

Gamma Correction

The detail of black and white field

Color - cross color Cross-color

Color – flesh tone correction

Too healthy

Color – white balance & color temperature

Black Body Locus

5300K6500K9300K

Color Temperature

NormalWarm Cool

Sharpness

More clear edge

Viewing AngleGood

Bad Lower contrast, color

Response Time

Tailing

UniformityMura

Jaggy

Jerky – 3:2 pull-down

Film modeVideo mode

Artifact

Jerky – motion blur

Panel Technology: IPS vs MVA

IPS (In plane switch)

MVA(Multi-domain vertical

alignment)

View angel Excellent Good

Response time Acceptable Acceptable

Contrast Good Good

Brightness OK OK

Quality control Hard to control OK

Yield Low High

Cost High Low

Technology Owner

Hitachi Fujitsu

User Hitachi, LG Phillip Samsung, Sharp, CMO, AUO

Source: JPMorgan estimates, December 2003

POSTENHANCE.

POSTENHANCE.

PQ Decision Weighting in LCD TV

TUNERTUNER

IFIF

LUMA/CHROMA

SEP

LUMA/CHROMA

SEP

SYNC SEP

SYNC SEP

CHROMA PROC

CHROMA PROC

LUMAPROC

LUMAPROC

SCALERSCALER

AUDIOPROC

AUDIOPROC

CONTROLCONTROL

DATAPROC

DATAPROC

RF

IF

CVBS

SIF

CS

HS/VS

YUV

RGB

IR/KBD

De-int.De-int.

CVBS

S

YPbPr

SCART

PC VGA/DVI1394

STB DVI/HDMI

LCD panel

480i/576i480p/576p

1080i720p

NTSCPAL

SECAM

STEREODECODER

STEREODECODER

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

A Typical Audio Specification Example• Sound Power

– 20 W RMS– 40 W Music Power

• 4 On Board Speakers• Separate Headphone• Audio line output

– Optical SPDIF output– AC-3 in HDTV broadcasting

• Dolby Virtual (surrounding process)

Virtual Surrounding Process

• Good sound can improve visual effect

• An auxiliary selling point:– SRS– BBE– Virtual Dolby

Some Real Surrounding Technology• Dolby Pro Logic

• Dolby Digital

• DTS

• THX Surround EX / Dolby Digital EX

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

RF connections

• NTSC (F-connector)

• PAL/SECAM (IEC connector)

Analog video connections

• CVBS

• S-video

• YPbPr/YCbCr

• SCART

• EIA-J D– D1-D5

• D-sub

HD support: 480P/1080I/720P

Japan D formatsD1: 480ID2: 480PD3: 1080ID4: 720PD5: 1080P

Digital video connections

• DVI– DVI-I– DVI-D– DVI-A– HDCP (High-speed Data Content Protection)

• 1394

• HDMI

Audio connections

• Baseband audio– RED: Right channel– WHITE: Left channel

• Sub-woofer

• Digital audio– Coaxial– Optical

Standard Connections

CVBS/S-video

YPbPr

YPbPr(HD) CVBS/S-video

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

Closed Caption

• Allows the viewer to read TV program dialogue or voice conversations as on screen text

V-chip

• A program content advisory data• Respond to the advisory data by blocking

content that the viewer finds objectionable• FCC approved a program rating system in

March 1998• All new TV sets (13 inches and larger) sold

within US should have it by January 2000

CC/V-chip For the US, Canada, and Brazil

Teletext

tele - text• It is a format to transmit data within a video

signal• Data rate is a few MBit/s• Accepted global standard (WST)• Secure delivery data channel• Data error checking• Low cost• Uni-directional

From 1 page to 1,000 pages

Teletext Pages

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

TV Color Systems

1. NTSC M NTSC-J NTSC 4.43

2. PAL I D B, B1, G, H N M Nc

3. SECAM D, K, K1, L B, G

World TV Systems

TV Channel Allocation

North America Japan

UHF

VHF-L

VHF-H

Analog Stereo Sound

• BTSC– North America, South America,

Taiwan• EIA-J

– Japan• Zweiton M

– Korea• Zweiton (A2)

– Germany

Stereo

Mono

SAP

Digital Stereo Sound

NICAM• Near Instantaneous Companded

Audio Multiplexer• First digital audio transmission• Near CD quality

for Europe, China, South-east Asia

Various Models by Region

PAL NTSC

EU AP China NA Japan Korea TW SA

Tuner PALSECAM

PALNTSC

PAL(CN-

multi.)

NTSC NTSC-J NTSC NTSC NTSC

Stereo

NICAMA2

NICAMA2

NICAM MTS EIA-J A2-M MTS MTS

I/O SCARTS/CVBS(YPbPr

)

S/CVBSYPbPr

S/CVBSYPbPr

S/CVBSYPbPr

S/CVBSD-conn.

S/CVBSYPbPr

S/CVBSYPbPr

S/CVBSYPbPr

Teletext

YES YES - - - - - -

CC/V-chip - - - YES - - - YES

Digital TV

Digitize the transmission to have user get:

• High quality AV– No noise, high definition, real surrounding

• More program access– Hundreds of program in same spectrum

• Information service– EPG: Electronic Program Guide– PPV: Pay Per View– Broadband Internet access– On-line shopping

World DTV Systems

Pushed by FCCPulled by HDTVPulled by

HDTV

Pulled byMulti-channel service

Subject

1. Picture2. Sound3. Connection4. Information5. Reception6. Multimedia function

VGA Timing Modes

Standard Resolution Refresh-rateVGA 640 x 480 60/75 HzSVGA 800 x 600 60/75 HzXGA 1024 x 768 60/75 HzWXGA 1280 x 768 60/75 HzWXGA 1280 x 720 60/75 Hz

Add-on Features

• Card reader6-in-1, show the content from DSC media

• Hard discVideo recording

• WirelessAny room, any place

LCD TV電子設計所需的基本功夫硬體設計• 類比及數位電路設計• 數位系統與微算機設計• 通信系統理論• 電磁波原理• 數位信號處理• 電視學

系統設計• 液晶顯像原理• 色彩學與光學量測• 類比與數位電視系統• 系統架構分析與整合

軟體設計• 微算機程式• 演算法• 計算機組織• 即時作業系統• 軟體工程• 電視學

Thank You!