EP0095716A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Mapping ram for a modulated display
Assignee: Linotype Paul Ltd
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Filing: 1983-05-25
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Granted: —
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Expires: 2003-05-25
Abstract
Abstract In a display, a screen RAM contains a memory location for each pixel. A mapping RAM contains a number of values corresponding to the display intensity range. The mapping RAM is substantially smaller than the screen RAM. A change in the input-output intensity characteristic requires only a change to affected values in the mapping RAM without changing the greater number of locations in the screen RAM corresponding to those affected values.
Inventors
- 👤 David Edward Murray Adsett
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:06
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/407
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
12 words
A system for controlling the modulation of areas on a display comprising
Claim 2
Independent Claim
12 words
A system for controlling the modulation of areas on a display comprising
Claim 3
Dependent Claim
49 words
(a) first and second means for storing data, said first store being larger than said second store (b) said second means for storing data containing a set of modulation levels (c) means for accessing said modulation levels in said second store responsive to said data in said first store.
Claim 4
Dependent Claim
49 words
(a) first and second means for storing data, said first store being larger than said second store (b) said second means for storing data containing a set of modulation levels (c) means for accessing said modulation levels in said second store responsive to said data in said first store.
Claim 5
Dependent Claim
35 words
The system of claim 1 wherein said second store is capable of storing a range of modulation levels and said modulation levels produced at the output of said second store is less than said range.
Claim 6
Dependent Claim
80 words
The system of claim 1 wherein said second store data is a plurality of intensity levels for modulating said display, said first store data being a plurality of addresses related to locations in said second store, and including means for identifying areas within the display and accessing said data in said first store related to respective display areas, means for accessing said intensity levels in said second store responsive to said first store data for modulating said respective display areas.
Claim 7
Dependent Claim
24 words
The system of claim 3 wherein said areas are halftone dot areas and including means responsive to said intensity levels for modulating said display.
Claim 8
Dependent Claim
39 words
The system of claim 1 including means for modifying said data in said second store, said modifying means being capable of modifying the modulation levels appearing on said display areas by modifying the said data in said second store.
Claim 9
Dependent Claim
28 words
The system of claim 5 wherein said means for modifying said second store data includes means for modifying selected data in said second store for respective mdoulation levels.
Claim 10
Dependent Claim
69 words
The system of claim 6 wherein said data in said second store is a plurality of intensity levels for modulating said display, said means for modifying includes means for varying the intensity levels in said second store, said intensity levels in said second store being related to said data in said first store by an input-output characteristic and said means for modifying said intensity levels varying said input-output characteristic.
Claim 11
Dependent Claim
65 words
The system of claim 7 wherein said means for modifying includes means for modifying selected intensity values in said second store for modifying respective points along said input-output characteristic and means for producing a new input-output characteristic curve joining said modified intensity levels and means responsive to said new input-output curve for writing new intensity levels in said second store indicative of said new curve.
Claim 12
Dependent Claim
53 words
The system of claim 7 wherein the intensity levels in said second store is related to said data in said first store by an input-output characteristic, said means for modifying includes means for modifying said input-output characteristic and for writing new intensity values into said second store corresponding to said new input-output characteristic.
Claim 13
Dependent Claim
49 words
The system of claim 8 where said points are the end points of the input-output characteristic, and said means for joining said modified points by a curve, producing a plurality of intensity values, related to said modified end points on said new input-output characteristic according to a predetermined relationship.
Claim 14
Dependent Claim
13 words
The system of claim 10 where said predetermined relationship is a linear relationship.
Claim 15
Dependent Claim
16 words
The system of claim 10 where said predetermined relationship is a second or higher order relationship.
Claim 16
Dependent Claim
12 words
The system of claim 10 where said relationship is a discontinuous relationship.
References Cited (Backward Citations)
No citation records indexed.
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