Rasterizer for pattern generator

Patent 4806921 Issued on February 21, 1989. Estimated Expiration Date:

February 21, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Computer-generated display for a fire control combat simulator
Patent #: 4209832
Issued on: 06/24/1980
Inventor: Gilham , et al.

Methods and apparatus for blending computer image generated features
Patent #: 4384338
Issued on: 05/17/1983
Inventor: Bennett

Memory control unit
Patent #: 4511962
Issued on: 04/16/1985
Inventor: Machida , et al.

Color video system using data compression and decompression
Patent #: 4580134
Issued on: 04/01/1986
Inventor: Campbell , et al.

Auxiliary memory in a video display unit of the raster scan type
Patent #: 4591850
Issued on: 05/27/1986
Inventor: Lundstrom

Multi-bit write feature for video RAM
Patent #: 4620186
Issued on: 10/28/1986
Inventor: Krause , et al.

Filled shaped generating apparatus Patent #: 4626838
Issued on: 12/02/1986
Inventor: Tsujioka , et al.

Inventors

Assignee

ATEQ Corporation

Application

No. 06/784856 filed on 10/04/1985

US Classes:

345/567, Using decoding345/440, Graph generating345/536, Plural storage devices345/571Memory addresses arranged in matrix row and column addresses)

Examiners

Primary: Curtis, Marshall M.

Attorney, Agent or Firm

Blakely, Sokoloff, Taylor & Zafman

International Classes

G03F 1/00 (20060101)
G09G 5/399 (20060101)
G09G 5/36 (20060101)
G09G 5/393 (20060101)

Abstract

A rasterizer, particularly suited for generating patterns for semiconductor masks and the like is described. An 8×8 array uses RAS, CAS and WE signals in addition to the memory address for accessing the array. A state machine is used to convert the pattern data (e.g., type of object orientation, etc.) into accessing data with the WE generator being driven through a ROM.