專利授權公司Shared Memory Graphics於2009年7月2日向遊戲大廠提告,有關於圖形加速器顯示技術的專利侵權訴訟。根據訴狀指出,系爭專利有2件(US5712664、US6081279),但是經查USPTO網站發現,Shared Memory Graphics公司在2009年6月從另外一家專利授權公司Acacia Patent Acquisition Corporation,轉讓取得共計14件專利,該系爭專利正是其中之2件,至於剩下12件專利,極可能也是準備用來打戰用的專利。而這14件專利的原始專利權人是屬於Alliance Semiconductor Corp。
Alliance Semiconductor公司係一家半導體記憶晶片公司,90%銷售額來自SRAM 及DRAM,還有裝於個人電腦、多媒體、網路及通訊設備之中的加速器。同時,也製造快閃記憶體晶片以及圖形快速顯示器和控制器。
![](Figures/2009/pclass_09_055.gif) |
Source: 科技政策研究與資訊中心—科技產業資訊室整理,2009/07。 |
表一、 Shared Memory Graphics, LLC 受讓取得之專利
Patent No. |
Title |
Original Assignee |
Filed |
IPC Code |
US5598095 |
Switchable current source for digital-to-analog converter (DAC) |
Alliance Semiconductor Corp |
1995-03-08 |
G05F 3/26 |
US5825681 |
Divider/multiplier circuit having high precision mode |
Alliance Semiconductor Corp |
1996-01-24 |
G06F 7/52 |
US5940067 |
Reduced memory indexed color graphics system for rendered images with shading and fog effects |
Alliance Semiconductor Corp |
1995-12-18 |
G06F 12/00 |
US5860076 |
48-bit wide memory architecture addressing scheme reconfigurable for 8-bit, 16-bit and 32-bit data accesses |
Alliance Semiconductor Corp |
1996-01-11 |
G06F 12/02 |
US6301629 |
High speed/low speed interface with prediction cache |
Alliance Semiconductor Corp |
1998-03-03 |
G06F 13/40 |
US6317135 |
Shared memory graphics accelerator system |
Alliance Semiconductor Corp |
2000-02-04 |
G06T 1/60 |
US5892516 |
Perspective texture mapping circuit having pixel color interpolation mode and method thereof |
Alliance Semiconductor Corp |
1996-03-29 |
G06T 15/20 |
US5638090 |
Window-dependent brightness/tint control for video digital-to-analog converters |
Alliance Semiconductor Corp |
1994-12-01 |
G09G 1/28 |
US6043804 |
Color pixel format conversion incorporating color look-up table and post look-up arithmetic operation |
Alliance Semiconductor Corp |
1997-03-21 |
G09G 5/02 |
US5598526 |
Method and system for displaying images using a dynamically reconfigurable display memory architecture |
Alliance Semiconductor Corp |
1995-02-23 |
G09G 5/02 |
US6081279 |
Shared memory graphics accelerator system |
Alliance Semiconductor Corp |
1997-10-21 |
G09G 5/39 |
US5777631 |
Method and apparatus for displaying a video window in a computer graphics display |
Alliance Semiconductor Corp |
1997-09-11 |
G09G 5/39 |
US5712664 |
Shared memory graphics accelerator system |
Alliance Semiconductor Corp |
1993-10-14 |
G09G 5/39 |
US5929872 |
Method and apparatus for multiple compositing of source data in a graphics display processor |
Alliance Semiconductor Corp |
1997-03-21 |
G09G 5/393 |
Source: USPTO,2009/07/07 |
(247字;圖:1;表:1)
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