Multilayer control of gobo shape

• US 20050213335A1
• Filed: 05/13/2005
• Published: 09/29/2005
• Est. Priority Date: 09/22/1999
• Status: Active Grant

• Current Assignee: Production Resource Group LLC
• Original Assignee: Production Resource Group LLC
• Inventors: Hunt, Mark A.
• Granted Patent: US 7,350,941 B2
• Time in Patent Office: Days
• US Class Current: 362/321
• CPC Class Codes: F21V 11/18 movable, e.g. flaps, slides
• CPC Class Codes: F21W 2131/406 for theatres, stages or film studios
• CPC Class Codes: G09G 2340/0428 Gradation resolution change
• CPC Class Codes: G09G 3/346 based on modulation of the reflection angle, e.g. micromirrors micromirrors devices per se G02B26/0833
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

A control of gobos defend by records in the gobo. The gobos are formed by menued shapes.

Claims

1. A method of forming a digital framing shutter, comprising:

defining aspects of a framing shutter, including four shutters, each of which have a straight line portion for framing the shutter, said straight portion being definable by its position in a light beam and its angle; and

defining a record for a gobo which simulates said framing shutters.

2. A method as in claim 1, wherein said framing shutter record includes multiple values for positions of each of four framing shutters including a value D representing a distance between a portion of the framing shutter and an edge of an original spot of a light beam, and a value theta defining an angle between the blade between the framing shutter and the specified angle.

3. A method as in claim 2, further comprising defining an offset representing a distance between an edge and an ideal edge.

4. A method as in claim 3, wherein said value D comprises a distance between an edge of the framing shutter and an edge of the original spot.