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PRODUCT INFORMATION
Vol.89
Video Signal-Processing IC for LCD TVs Developed Conversion of NTSC to XGA quality using resolution conversion technology for the first time in the industry
LC74980W
Overview
The flat panel market has recently become extremely active, with new LCD, PDP, FED (field emission display), and EL (electroluminescence) products appearing one after another. In particular, LCD panels are being used in an ever expanding range of products, such as notebook PCs, desktop PC monitors, and TV sets. In the LCD TV area, a market that first showed rapid growth in 1998, consumers and manufacturers alike are now looking forward to the appearance of popularly-priced products such as wall-mounting TV sets and paper-thin TV sets that take advantage of the merits of flat panel displays, such as their space saving and energy saving characteristics and their light weight. However, to apply the improvements in LCD panel performance, in particular the improved viewing angles, increased brightness, and faster response times, to direct-display large-screen flat panels used for TV sets, the NTSC scanning technique--interlaced scanning, in which every other line is displayed--must be converted to the LCD panel scanning technique--progressive scanning, in which lines are displayed sequentially. Sanyo has now developed the industry's first IC, the LC74980W, that can convert a standard TV signal to a video signal appropriate for an XGA resolution (1024 x 768 dots) LCD panel. The LC74980W is based on the know-how Sanyo acquired developing its earlier PC to NTSC scan converter ICs, and adds newly-developed video conversion technologies, support for multiple signal sources, and image quality enhancing technology to achieve an image quality appropriate for LCD panels. This newly-developed resolution conversion technology supports both interlaced and progressive scan input signals, achieves a smooth enlargement effect with a perfectly natural appearance, and creates a high image quality XGA progressive scan signal appropriate for current LCD panels. The multiple signal source feature supports both NTSC and PAL standard TV signals, and can also convert non-standard signals used in VCR special playback modes to XGA resolution. It also supports the 480I and 480P digital TV broadcast formats. The LC74980W image quality enhancing technology allows end product to provide a full complement of adjustment functions for optimal image display of TV images based on multiple image quality adjustments. For example, the display characteristics of LCD panels involve deviations from linearity
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
TOKYO OFFICE: Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 1
PRODUCT INFORMATION
due to the properties of the LCD panel itself. The LC74980W includes programmable -correction functions for each of the RGB colors, thus allowing applications to achieve optimal color reproduction. The development of the LC74980W brings the cost reductions associated with single chip integration to this area as well, and allows LCD TV set products to be created easily.
Features
* Resolution conversion technology: The LC74980W supports both interlaced and progressive scan input signals, and converts its input to a high image quality XGA progressive scan signal appropriate for recent LCD panels. * Multiple source support: In addition to NTSC and PAL inputs, the LC74980W also converts the non-standard signals used in VCR special playback modes to an XGA resolution video signal. It also supports the DTV 480I and 480P standards. * Image quality enhancing technology: In addition to a full complement of image quality adjustments, including sharpness, color, color phase, contrast, brightness, white balance, and black balance, the LC74980W also provides independently programmable -correction for each of the RGB colors. * Other features -- OSD controller: Allows the adjustment controls to be displayed on the TV itself. (OSD: on-screen display) -- Dither processing: Allows the equivalent of 16 million colors to be displayed by gradation enhancement technology. -- I2C bus -- Supports 5 V inputs
Specifications and Functions
Input Signals * NTSC and PAL -- YUV digital 8-bit signals -- Supports point sequential multiplexed 8-bit signals for UV. * Digital TV (480I and 480P) -- YCbCr digital 8-bit signals * Synchronizing signal: Component synchronizing signals * Blanking signal: Component or composite signals * Clock input
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
2
PRODUCT INFORMATION
Output Signals * XGA output: RGB digital in 6-bit units/2-phase signal * Synchronizing signal: Component or composite signals * Blanking output: Component or composite signals * Clock output: Both single-phase and 2-phase clocks are output. Control * I2C control (Allows internal registers to be set and status information to be output.) * Three-wire bus (for OSD functions and -correction control) Other Specifications * Supply voltage: 3.3 V * Maximum operating frequency: 65.0 MHz * Package: SQFP208
Sample Availability
The LC74980W will be available in sample quantities by December 1999 and in production quantities by March 2000.
SEPTEMBER 21, 1999
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
3
PRODUCT INFORMATION
s Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. s SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. s Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. s SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. s In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. s No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. s Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
SANYO Electric Co., Ltd. Semiconductor Company Overseas Marketing Division
PS.O0199/89
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