FLAT PANEL DISPLAY CONTROLLERS APPLICATION popularity demand flat
|
|
|
Top Searches for this datasheet
David Blass, Product Marketing Engineer
FLAT PANEL DISPLAY CONTROLLERS APPLICATION
popularity demand flat panel displays replacing CRTs grows annually. With increasing popularity these display devices, there ever increasing challenge have flat displays maintain same advanced performance characteristics with little concession. fact remains, however, that flat panel display widely different from CRT. addition, flat display technologies, LCD, Plasma, differ greatly from each other. Since displays have different operational cost differences, there obvious display applications. state-of-the-art controller must able displays, maximizing their particular strengths while minimizing their weaknesses. This been ultimate challenge leading chip manufacturers. maximizing operation various displays understanding differences between various flat display technologies. large active area that display different resolutions, given it's timing parameters. place pixels rows data anywhere directed control signals. this way, resolution displays placed high resolution CRTs "blank" areas displays "filled" compensated. flat display different because they have fixed matrix rows columns pixels. This means that lower resolution video cannot give panel necessary signals drive display. Apart from physical differences between flat displays, another major obstacle "translation" color information monochrome displays. Color grayscale representation must transparent software video controller, while same time, accurate viewer. That that color representation black white must have same tone quality intensity video information compromised. Finally each flat technology exhibits different performance variances that prevent display from appearing identically like CRT. Response timing, contrast, phosphors properties require unique handling either minimize performance liability method enhancing displays characteristics.
1986 time frame, chip industry tackled driving flat display with early introduction compatible laptop computers. poor operational characteristics, displays only limited demand prior that point. Given comparable resolutions, timing requirements Plasma technologies were only slightly different than CRT. demand controllers grew, early chip manufacturers succeeded lowering component count function were able required control lines operate display. have unique controller that could drive display while being totally transparent host From this beginning, families controller chips compatible, born. Later, controllers grew meet requirements specification. this case, models from Japan were 400. specification 350, first tack controllers compensate this resolution/timing difference. flat display controller designed lines data onto line display double writing every seventh line. This filled display with lines data worked with standard data from standpoint. Resently, demands video controllers have increased. ubiquitous video standard. Because this, impossible monochrome other resolution 480. other technologies; color LCD, passive dutydrive color displays, Plasma need driven environment. keep with these display technologies while "playing favorites" supporting display type, modern chip manufacturers have introduce entirely families display controllers. These controllers have latest architecture that allows them keep with panels that have been released. trends display controllers dictate that display controller must able operate current displays demanded market drive soon-to-be-released models technologies. Secondly, manufacturers must respond con-
Page
Flat Panel Display Controllers stant pressure from market competitively priced while increasing performance. Other concerns today's controllers manufacturers migration operation, supporting higher resolutions with XGA-compatible specification, simultaneously operating with flat display, supporting very large color palettes ability compatible newest trends architecture. while, performance compatibility hardware software cannot jeopardized. these ends, modern chip manufacturer introducing families controllers rather than just device. Each family core design that code register compatible with other members. This core design developed have design features that required today's market, while maintaining competitive price. scaled back, limited operation applications chip offered with reduced specifications, primarily targeted towards black white operation notebook operation. This device typically offers less function reduced price. some cases, subset this device offered extremely power/chip count operation
Liquid Crystal Displays limited only function. This number market demand notebook industry. other extreme, there superset basic device that maximizes colors, speed upward compatibility with next generation video standards. These devices will cost more than base device will perform them well. purpose this application note outline display controllers currently released market video controller manufacturers. Each manufacturer, presented alphabetical order, prepared themselves, page overview their leading devices. Following this section matrix specifications. This will allow engineer better evaluate each device from manufacturer well comparing them other manufacturers "apple apple" comparison. This document been reviewed participants fairness accuracy. specification document, various parameters change over time. Though every effort correct thorough, Sharp Electronics cannot guarantee accuracy information presented.
Page
Flat Panel Display Controllers
CHIPS TECHNOLOGIES CHIPS 65520/530 MONOCHROME/COLOR FLAT PANEL/CRT CONTROLLER OVERVIEW
65520 pin-compatible 65530 supports 1280 1024 grayscales grayscales Sharp's monochrome panels. 65520 increases color palette Sharp's 512-color LCDs 24,389 colors. pin-compatible 65530 supports Sharp's single dual-drive color LCDs with 226,981 color palette 512-color LCDs with 185,193 color palette. 65520 65530 provides variety fully programmable options enhance display quality, such Gray scaling algorithm reduce flicker fast-response,"mouse quick" LCDs Vertical compensation techniques completely fill panel with lower resolution software line replication, blank line insertion SMARTMAP color grayscale conversion optimize foreground/background contrast text modes 65520 65530 provides simultaneous display with single dual-drive LCDs faster). 65520 65530 requires only three external components CHIPS' 82C404 programmable clock synthesizer memories complete sub-system motherboard. Memory options include four 256K DRAMs 256K VRAMs 512K DRAMs. VRAMs provide significantly higher performance lower power consumption than DRAMs video memory. 65520 65530 provide high performance Graphics User Interface (GUI) application software. controllers employ FIFO write buffer architecture providing zero wait-state operation with bus. 65520 supports 386SL's "PI" local bus, 65530 supports 386SL's "PI" 386DX/SX's local buses. 65520 65530 both optimized minimum power consumption. 65530 provides "mixed" operation, that VGA, video memory interface operate panel interface operates 65520 operates either Both 65520 65530 supports self-refresh 256K DRAMs 512K DRAMs during suspend/resume power down.
Table CHIPS 65520/530 Monochrome/Color Flat Panel/CRT Controller
FEATURES
Drives Monochrome Color LCD, Plasma Panels 1024 Colors/800 Colors CRTs Simultaneous LCD/CRT Display Programmable Gray Scaling/Color Generation Algorithm Four Chip Sub-System Supports Various Video Memory Configuration Local Support; Write Buffer/FIFO; 0-Wait State Operation Full Backwards Compatibility
BENEFITS
Flexible Panel Support Super Resolution Support Facilitates Making Presentations Supports "Mouse Quick" LCDs Minimum Chip Count/Board Space Range Price/Performance Options High Graphics Performance Extends Battery-Base Operation Runs Application Software
Page
Flat Panel Display Controllers
CHIPS TECHNOLOGIES CHIPS 82C9001A VIDEO WINDOWING CONTROLLER OVERVIEW
CHIPS Video controller provides real-time video data acquisition, scan rate conversion display windowing control displaying live video with graphics flat panel displays monitors. Video supports industry-standard video formats (NTSC, PAL, SECAM, S-VHS RGB). size video window controlled Video's input cropping scaling features. position video window controlled independent coordinates color keying. Video's ability save restore acquired data to/from system disk memory enables Video sub-system serve low-cost frame grabber. Video 82C457 provide cost-effective method displaying video from tape, CD-ROM, camera digital tuner graphics window monitor Sharp's color LCD.
Table CHIPS 82C9001A Video Windowing Controller
FEATURES
Merges Video Input With Graphics Very Cost Effective Still Frame Capture Display Programmable Window Size Position Direct Interface With CHIPS 82C457
BENEFITS
Provides Cost-Effective Multi-Media Solution Reduces End-User Price From $2,000 $500 Serves Frame Grabber Provides End-Users With Full Control Supports Simultaneous Display LCDs CRTs
CHIPS TECHNOLOGIES CHIPS 82C457 Full-Color Flat Panel/CRT Controller OVERVIEW
82C457 along with CHIPS' 82C9001A Video Windowing Controller displays live video image with graphics simultaneously monitor Sharp's color LCD. 82C457 increases color palette Sharp's 512-color LCDs 24,389 colors. 82C457's programmable vertical compensation techniques stretch lower resolution software completely fill resolution LCDs.
Table CHIPS 82C457 Full-color Flat Panel/CRT Controller
FEATURES
Direct Interface Video CHIPSet 24,389 Color LCDs Colors Monitors Full Backwards Compatibility Five Chip Sub-System
BENEFITS
Full Motion Video Capability LCD/CRTs Direct Interface Sharps Color LCDs Super Resolution Support Runs Application Software Chip Count/Board Space
Page
Flat Panel Display Controllers
CHIPS TECHNOLOGIES CHIPS F8680 SINGLE CHIP OVERVIEW
F8680 integrates into single chip functionality required implement compatible computer except memory. chip integrates highperformance 8086 compatible CPU, Graphics Controller, Systems Logic, 16C450-Compatible UART, Power Management into single PQFP. controller supports 400, smaller resolution single drive LCDs. controller features programmable Frame Rate Control "Visual Map". Visual provides excellent visual contrast Panel. possible foreground/background contrast combinations programmable. Only SRAM required video memory.
Table CHIPS F8680 Single Chip
FEATURES
Programmable grayscales using Visual Programmable Frame Rate Control Sleep/Suspend Mode Support Small Panel Support High Integration
BENEFITS
Excellent Visual Contrast Reduced Flicker Increased Battery Life Non-Standard Display Reduced Power Board Size
CHIPS TECHNOLOGIES CHIPS 82C426 LCD/CRT CONTROLLER
82C426 provides eight flicker-free grayscales colors panels with resolutions monitors. 82C426's SMARTMAPfeature improves contrast text monochrome LCDs. 82C426 employs single SRAM video memory, enabling highly integrated sub-system.
Table CHIPS 82C426 LCD/CRT Controller
FEATURES
Resolution LCDs grayscales Colors
BENEFITS
Direct Interface Small, Low-Cost LCDs Flicker-Free Display Quality Improvides Contrast Text LCDs Quality Text Sub-System Extends Battery LIfe
SMARTMAP
SLEEP Mode
Font
Page
Flat Panel Display Controllers
CIRRUS LOGIC CL-GD6410 CONTROLLER NOTEBOOK COMPUTERS OVERVIEW
CL-GD6410 single-chip controller optimized notebook computers, where reduced form factor power consumption critical design objectives. With CL-GD6410, complete motherboard controller requires only four five ICs, within four square inches (excluding power sources connectors). true two-DRAM video memory (256K chip RAMDAC, direct-connect interface, direct-connect interface help minimize form factor. using Cirrus Logic's Frame Accelerator technique, CL-GD6410 able provide high vertical refresh rate dual-scan panels while operating approximately one-half clock speed other controller solutions; this provides significant reduction full-active power consumption extends battery life. addition, standby suspend modes supported hardware CLGD6410 enable multiple levels system power management. CL-GD6410 provides shades gray monochrome panels. Duty-cycle modulation, combined with dynamic pattern-management algorithms, provide 480-resolution grayscales with apparent flicker. Pixel-doubling stripping techniques provide increased grayscale highcolor Mode cases, Cirrus Logic gray scale provides consistent linear-step functions, making smooth transitions from black, through grayscale, white. With direct connection 512-color panels, CL-GD6410 provides single-controller solution ochrome color portable computers. CL-GD6410 also provides direct interface CL-GD6340, Cirrus Logic's color interface controller, color panels. CL-GD6410 supports SimulSCANTM, technique introduced Cirrus Logic achieving simultaneous operation. SimulSCANsupports both single dual-scan LCDs, both fixed multifrequency analog CRTs. Monochrome LCDs operated reverse video (pagewhite) simultaneously with normal operation.
FEATURES
Single-chip controller IBM-VGA-hardware-compatible Simultaneous (SimulSCANTM) operation 265K DRAM video memory small form factor Integral RAMDAC Integral panel interface
Control data buffering Power sequencing logic
Direct connection Frame-Accelerator active power Standby suspend modes save power Expanded operational range: 64-shade grayscale monochrome
NTSC sum-to-gray color mapping Multiple sum-to-gray weighting options
Direct connection 512-color panels
Single-controller design monochrome
color LCD's Graphics text expansion modes color analog 16-bit interface Packaged 160-pin (EIAJ-standard) package
Pin-out optimized efficient board layout
Page
Flat Panel Display Controllers
CIRRUS LOGIC CL-GD6412 CONTROLLER MIXED-VOLTAGE NOTEBOOK COMPUTERS OVERVIEW
CL-GD6412 single-chip controller optimized systems with components, where quick implementation notebook computer with reduced power consumption critical design objective. design using CL-GD6412, internal logic power supply reduced power consumption. video memory, host interface, panel interface, clock interface each implemented either voltages these interfaces mixed virtually combination. Multiple levels system-power management supported hardware CL-GD6412. Standby mode driven software, internal counter. Suspend mode driven software hardware means suspend pin. hardware suspend allows nearly complete shutdown device, with decoding very power consumption. CL-GD6412 based proven CL-GD6410 architecture, industry's most popular controllers. Basic design programming models unchanged. This allows highest confidence quick development schedules. With CL-GD6412, complete motherboard controller requires only four five ICs, three external pull-up/pull-down configuration resistors. designed less than four square inches (excluding power sources connectors). two-DRAM video memory interface (256K on-chip RAMDAC, direct-connect interface, directconnect interface, help minimize formfactor. CL-GD6412 enhanced algorithms dynamic pattern-management within Frame Rate Duty Cycle, providing grayscale with minimum apparent flicker, even quick response 'mouse-quick) panels. cases, Cirrus Logic grayscale provides smooth transitions from black, through grayscale, white, maximum display quality realistic images. CL-GD6412 supports SimulSCAN technique introduced Cirrus Logic achieving simultaneous operation. Reverse video controlled separately display data path, that page-white operation occur simultaneously with normal operation.
FEATURES
Single-chip controller Mixed voltage: major interface
Supports JEDEC Number voltage CMOS
standard ±0.3
system components with
external-level converters hardware-compatible 265K DRAM video memory small form-factor Integrates RAMDAC Integrates panel interface
Control data buffering Power sequencing logic
Direct connection Frame-Accelerator low-active power shade grayscale monochrome
NTSC sum-to-gray color mapping Multiple gray weighting options
Enhanced flicker-reduction algorithms quick response LCDs Direct connection 512-color (Thin Film Transistor)
Single-controller design momochrome
color LCDs Graphics expansion compression maps modes fixed-resolution Packaged 160-pin (EIAJ-standard) package
Page
Flat Panel Display Controllers
CIRRUS LOGIC CL-GD6420 CONTROLLER HIGH-RESOLUTION NOTEBOOK COMPUTERS OVERVIEW
CL-GD6420 single-chip controller optimized high-end notebook computers, where high resolution capabilities high preformance critical design objectives. CLGD6420 based proven architecture CL-GD6410. CL-GD6420 adds scaleable video memory capability, supporting eight 265K DRAMs. using Cirrus Logic Frame-Accelerator technique, CL-GD6420 able provide high vertical refresh rate dual-scan panels while operating approximately one-half clock speed non-accelerated controller solutions. This provides significant reduction full-active power consumption, extending battery life notebook computers. Standby Suspend Modes supported hardware CL-GD6420, enable mutiple levels system power management. Standby mode initiated software, programmable on-chip timer, separate standby pin. CL-GD6420 provides shades gray monochrome panels. Duty cycle modulation, combined with improved dynamic pattern management algorithms, provide shades gray with minimum perceivable flicker, even fast response (mouse-quick) panels. Grayscale enhancement provides apparent shades gray color extended mode operation. Pixel-doubling stippling techniques provide increased grayscale Mode 13H. With direct connection 512-color panels, CL-GD6420 provides single-controller solution grayscale monochrome 256-simultaneous-color portable computers. Extended color mode support allows resolution with colors panels. color panels, CL-GD6420 provides direct interface CLGD6340 color interface controller. CLGD6420 supports SimulSCANope technique introduced Cirrus Logic achieving simultaneous operation. SimulSCANsupports both single dual-scan LCDs, both fixed multifrequency analog CRTs. Monochrome LCDs operated reverse video (page-white) simultaneously with normal operation.
FEATURES
Single-chip hardware-compatable controller MByte 256K DRAM Video Memory Extended resolution 1024 with colors Simultaneous display panel Integral RAMDAC Integral panel interface
Control data buffering Power sequencing logic
Direct connection Standby Suspend Modes save power
Internal standby counter hardware standby
Expanded operational range: ±10% 64-shade grayscale monochrome
NTSC sum-to-gray color mapping Multiple sum-to-gray weighting options
Enhanced flicker-reduction algorithms quick response LCDs Direct connection 512-color panels Graphics text expansion Packaged 160-pin (EIAJ standard) package
Page
Flat Panel Display Controllers
CIRRUS LOGIC CL-GD6340 COLOR INTERFACE CONTROLLER OVERVIEW
CL-GD6340 flat-panel interface chip with CL-GD64xx family graphics chips provide full-color displays color panels. using multiple techniques color shading, CLGD6340 able increase number colors display. This interface controller also produce shades gray monochrome panels. CL-GD6340 supports active matrix panels with bits pixel 512, 32K-color panel capability). supports color passive (STN) with single dual-scan architectures. CL-GD6340 handles subtle graduations shade hue, expanding panel's total color grayscale) capability, providing display quality that compares with CRTs. With complete Cirrus Logic color solution, even eight-color panels support modes (including mode 13), displaying simultaneous from palette thousands. CL-GD6340 features highly-programmable panel interface, with timing power-sequencing logic. CL-GD6340 provide SimulSCANoperation, driving analog digital parallel. SimulSCAN supports both single dual-scan LCDs, both fixed multifrequency analog CRTs. Monochrome LCDs operated reverse video (page-white) simultaneously with normal operation.
FEATURES
On-chip support active-matrix panels
512, 32K-color panels Monochrome panels with without grayscaling
capability On-chip support passive-matrix panels
Dual scan Single-chip
On-chip buffers logic support monochromeand color-passive panels (single- dualpanel displays) Provides full-color color panels
simultaneously displayed colors
mode
simultaneously displayed colors
mode
Selected from palette thousands colors
Supports modes monochrome panels
shade grayscale passive monochrome
panels
shade grayscale active-matrix panels without grayscaling capability Simultaneous displays analog Easy interface with Cirrus Logic controller chips On-chip RAMDAC RAMDAC extension registers operation Packaged EIAJ-standard 100-pin plastic Quad Flat Pack (QFP) package
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
Page
Flat Panel Display Controllers
LIFE SUPPORT POLICY SHARP components should used medical devices with life support functions safety equipment similiar applications where component failure would result loss life physical harm) without written approval officer Sharp Corporation.
SHARP reserves right make changes specifications time without notice. SHARP does assume responsibility circuitry described; circuit patent licenses implied.
NORTH AMERICA
EUROPE
ASIA
SHARP Electronics Corporation Microelectronics Group 5700 Pacific Blvd., Camas, 98607, U.S.A. Phone: (360) 834-2500 Telex: 49608472 (SHARPCAM) Facsimile: (360) 834-8903
SHARP Electronics (Europe) GmbH Microelectronics Division 20097 Hamburg, Germany Phone: (49) 2376-2286 Telex: 2161867 (HEEG Facsimile: (49) 2376-2232
SHARP Corporation Integrated Circuits Group 2613-banchi, Ichinomoto-cho Tenri-shi, Nara Pref. 632, Japan Phone: (07436) 5-1321 Telex: LABOMETA-B J63428 Facsimile: (07436) 5-1532
1993 SHARP Corporation Editions: 1993 Printed bound U.S.A.
Ref. SMT92025
Other recent searches
SC604A - SC604A SC604A Datasheet
PS223 - PS223 PS223 Datasheet
BLP-850+ - BLP-850+ BLP-850+ Datasheet
1759650000 - 1759650000 1759650000 Datasheet
Privacy Policy | Disclaimer
© 2012 Datasheet Archive
