Patent US4236178A successfully refreshed from Google Patents.
US4236178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron microscope with brightness/contrast indicator
Assignee: US Philips Corp
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Filing: 1979-01-10
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Granted: 1980-11-25
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Expires: 1999-01-10
Abstract
Abstract A series of LED elements is included in a scanning electron microscope in order to indicate the brightness and the contrast of a video signal to be recorded. The brightness is indicated by the position of an illuminating LED element, and the contrast is indicated by the number of alternately illuminating LED elements. The use of different colors for the LED elements provides an indication as to how far the signal to be detected may be intensified. The number of the centrally arranged LED elements of the same color preferably corresponds to the number of grey levels of a grey scale generator included in the circuit.
Inventors
- 👤 Johan C. Tiemeijer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:50
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/26; H01J37/28; G; G01; G01R; G01R19/00; G01R19/165; G01R19/16566; G01R19/1659; G01R19/16595; H01J37/02; H01J37/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
An electron microscope comprising a beam scanning device coupled to a television chain, visual display means for displaying a video signal generated from an object, adjusting means for adjusting contrast and brightness of a video signal to be displayed, said adjusting means comprising a series of LED elements combined in a circuit in which, when the video signal to be recorded reaches a given level, an LED element of the series which is adjusted for this particular level is activated.
Claim 2
Dependent Claim
80 words
An electron microscope comprising a beam scanning device coupled to a television chain, visual display means for displaying a video signal generated from an object, adjusting means for adjusting contrast and brightness of a video signal to be displayed, said adjusting means comprising a series of LED elements combined in a circuit in which, when the video signal to be recorded reaches a given level, an LED element of the series which is adjusted for this particular level is activated.
Claim 3
Dependent Claim
31 words
An electron microscope as claimed in claim 1, wherein said LED elements are line-wise arranged and emit different colors in a sequence which is symmetrical with respect to a central section.
Claim 4
Dependent Claim
36 words
An electron microscope as claimed in claim 1, wherein a number of grey levels of a grey scale generator included in the system corresponds to the number of centrally arranged LED elements of the same color.
Claim 5
Dependent Claim
23 words
An electron microscope as claimed in claim 1, wherein said LED elements at the ends of said series are of a different color.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |