平面顯示器 電子系統設計技術要項

液晶 (LCD)  LCD TV 是未來的明星工業 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 Picture Sound Connection Information Reception 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

 The detail of black and white field 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 5300K 6500K 9300K

Color Temperature Warm Normal Cool

Sharpness More clear edge

Viewing Angle Good Bad Lower contrast, color

Response Time Tailing

Uniformity Mura

Jaggy

Jerky – 3:2 pull-down Artifact Video mode Film mode

Jerky – motion blur

Panel Technology: IPS vs MVA (In plane switch) MVA (Multi-domain vertical alignment) View angel Excellent Good Response time Acceptable Contrast Brightness OK Quality control Hard to control Yield Low High Cost Technology Owner Hitachi Fujitsu User Hitachi, LG Phillip Samsung, Sharp, CMO, AUO Source: JPMorgan estimates, December 2003

PQ Decision Weighting in LCD TV CONTROL TUNER IR/KBD RF STEREO DECODER AUDIO PROC NTSC PAL SECAM IF IF DATA PROC SIF CVBS YUV CVBS LUMA PROC S LUMA/ CHROMA SEP De-int. SCART YPbPr CS CHROMA PROC 480i/576i 480p/576p 1080i 720p SCALER SYNC SEP HS/VS POST ENHANCE. RGB LCD panel PC VGA/DVI 1394 STB DVI/HDMI

Subject Picture Sound Connection Information Reception 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 Picture Sound Connection Information Reception 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 formats D1: 480I D2: 480P D3: 1080I D4: 720P D5: 1080P

Digital video connections DVI DVI-I DVI-D DVI-A HDCP (High-speed Data Content Protection) 1394 HDMI

Audio connections Baseband audio Sub-woofer Digital 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 Picture Sound Connection Information Reception 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 Picture Sound Connection Information Reception 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 VHF-L VHF-H UHF North America Japan

Stereo Mono SAP BTSC EIA-J Zweiton M Zweiton (A2) Analog Stereo Sound North America, South America, Taiwan EIA-J Japan Zweiton M Korea Zweiton (A2) Germany Stereo Mono SAP

NICAM Digital Stereo Sound 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 SECAM (CN-multi.) NTSC-J Stereo NICAM A2 MTS EIA-J A2-M I/O SCART S/CVBS (YPbPr) YPbPr D-conn. Teletext YES - CC/V-chip

Digitize the transmission to have user get: 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 Pulled by Multi-channel service Pushed by FCC Pulled by HDTV Pulled by HDTV

Subject Picture Sound Connection Information Reception Multimedia function

VGA Timing Modes Standard Resolution Refresh-rate VGA 640 x 480 60/75 Hz SVGA 800 x 600 60/75 Hz XGA 1024 x 768 60/75 Hz WXGA 1280 x 768 60/75 Hz WXGA 1280 x 720 60/75 Hz

Add-on Features Card reader Hard disc Wireless 6-in-1, show the content from DSC media Hard disc Video recording Wireless Any room, any place

LCD TV電子設計所需的基本功夫 電視學 電視學 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

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