US4278347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube image recording device
Assignee: Fujifilm Holdings Corp
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Filing: 1980-02-07
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Granted: 1981-07-14
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Expires: 2000-02-07
Abstract
Abstract A cathode-ray tube image recording device for recording images on a photosensitive thermal development recording medium which may have a reduced sensitivity due to time deterioration. An image of a density wedge is exposed and developed then sensed to determine the sensitivity of the recording medium. The sensing operation produces a density identification step number which is used to set one or both of the brightness and light emission time of the cathode-ray tube in accordance with a predetermined characteristic curve or function. A switchable resistor circuit or read-only memory may be used for applying the characteristic function.
Inventors
- 👤 Yoshihiko Okamoto
- 👤 Tamotu Yoshizawa
- 👤 Takahiro Ohta
- 👤 Koichi Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:33
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/407; H04N1/4076; H04N1/4078
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A device for recording an image on a cathode-ray tube on a photosensitive thermal development recording medium which comprises: means for exposing a recording medium sensitivity determining density wedge; means for sensing a developed sensitivity determining density wedge for producing a density identification step number; means for controlling at least one of the brightness and light emission time of said cathode-ray tube in response to said density identification step number.
Claim 2
Independent Claim
70 words
A device for recording an image on a cathode-ray tube on a photosensitive thermal development recording medium which comprises: means for exposing a recording medium sensitivity determining density wedge; means for sensing a developed sensitivity determining density wedge for producing a density identification step number; means for controlling at least one of the brightness and light emission time of said cathode-ray tube in response to said density identification step number.
Claim 3
Dependent Claim
21 words
The device as claimed in claim 1 further comprising means for exposing auxiliary information commonly with said sensitivity determining density wedge.
Claim 4
Dependent Claim
15 words
The device as claimed in claim 1 wherein said sensing means comprises photo-electric sensing means.
Claim 5
Dependent Claim
33 words
The device as claimed in claim 1 wherein said controlling means comprises means for setting said at least one of said brightness and light emission time in response to a predetermined characteristic function.
Claim 6
Dependent Claim
32 words
The device as claimed in claim 4 wherein said controlling means comprises means for providing a plurality of switchable resistance values, said resistance values being determined in accordance with said characteristic function.
Claim 7
Dependent Claim
34 words
The device as claimed in claim 4 wherein said controlling means comprises means for producing a pulse having a width in proportion to said at least one of said brightness and light emission time.
Claim 8
Dependent Claim
24 words
The device as claimed in claim 6 wherein said pulse producing means comprises a read-only memory for storing data corresponding to said characteristic function.
References Cited (Backward Citations)
US3400632A
Cited
US3938164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-07-13 | 1985-01-12 | 1985-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-13 | 1989-01-12 | 1989-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-13 | 1993-01-12 | 1993-07-14 | $7700.00 | Window Closed / Lapsed |