US4697900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device for a camera
Assignee: Canon Inc
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Filing: 1986-07-18
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Granted: 1987-10-06
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Expires: 2006-07-18
Abstract
Abstract The disclosed display device has a number of display elements arranged in a row and successively driven so that a display film transport is presented as if the border of one film frame runs from one of two spools marks to the other in the same direction in which the film is actually being transported across the exposure gate. The display device also indicates whether or not a film cartridge is loaded in the camera.
Inventors
- 👤 Masaharu Eguchi
- 👤 Masayoshi Kiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:40
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
152 words
A camera having a display device, comprising: (a) film transport detecting means for detecting whether a film is being transported or not being transported and for forming a transport signal when the film is transported; (b) a display device having a plurality of display elements for indicating a plurality of display states; (c) a control circuit responsive to said transport signal for activating said display elements successively in a prescribed order, said circuit effecting the display states of the plurality of display elements when the film transport stops upon completion of advancement of one frame; (d) a timer circuit for producing an output when the transportation of film corresponding to one frame is not completed within a timer period; and (e) said control circuit being responsive to said output for moving the display state of said display elements to a different display state from that effected in response to said transport signal.
Claim 2
Dependent Claim
152 words
A camera having a display device, comprising: (a) film transport detecting means for detecting whether a film is being transported or not being transported and for forming a transport signal when the film is transported; (b) a display device having a plurality of display elements for indicating a plurality of display states; (c) a control circuit responsive to said transport signal for activating said display elements successively in a prescribed order, said circuit effecting the display states of the plurality of display elements when the film transport stops upon completion of advancement of one frame; (d) a timer circuit for producing an output when the transportation of film corresponding to one frame is not completed within a timer period; and (e) said control circuit being responsive to said output for moving the display state of said display elements to a different display state from that effected in response to said transport signal.
Claim 3
Dependent Claim
59 words
A display device for a camera comprising: (a) a plurality of display elements; and (b) a display control circuit responsive to film transport for changing the display pattern of said display elements and responsive to completion of advancement of one frame of film for transferring the display pattern to a particular one representing the completing state of film transport.
Claim 4
Dependent Claim
59 words
A display device for a camera comprising: (a) a plurality of display elements; and (b) a display control circuit responsive to film transport for changing the display pattern of said display elements and responsive to completion of advancement of one frame of film for transferring the display pattern to a particular one representing the completing state of film transport.
Claim 5
Dependent Claim
29 words
A display device according to claim 2, wherein said display elements are arranged in a row, and the number of driven elements is increased when the film is transported.
Claim 6
Dependent Claim
114 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; (c) a film take-up loop-shaped display portion arranged at another end of the row of said display elements; and (d) a drive circuit for rendering the elements displaying successively in a direction for the nearest one to the cartridge-shaped display portion to the loop-shaped display portion when the film is wound up, and rendering the elements displaying successively in another direction from the nearest one to the loop-shaped display portion toward the cartridge-shaped display portion when the is film is rewound.
Claim 7
Dependent Claim
114 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; (c) a film take-up loop-shaped display portion arranged at another end of the row of said display elements; and (d) a drive circuit for rendering the elements displaying successively in a direction for the nearest one to the cartridge-shaped display portion to the loop-shaped display portion when the film is wound up, and rendering the elements displaying successively in another direction from the nearest one to the loop-shaped display portion toward the cartridge-shaped display portion when the is film is rewound.
Claim 8
Dependent Claim
103 words
A display device for a camera comprising: (a) a plurality of display elements; (b) detecting means for detecting a film transport operation; (c) a display control circuit responsive to detection of the film transport operation by said detecting means for changing the display pattern of said display elements successively so the film transport is displayed; and (d) a detecting circuit for detecting that the transport operation has stopped before the film is advanced one frame by said film transport operation so that said display control renders the display elements in a particular display state in response to a signal from said detecting circuit.
Claim 9
Dependent Claim
103 words
A display device for a camera comprising: (a) a plurality of display elements; (b) detecting means for detecting a film transport operation; (c) a display control circuit responsive to detection of the film transport operation by said detecting means for changing the display pattern of said display elements successively so the film transport is displayed; and (d) a detecting circuit for detecting that the transport operation has stopped before the film is advanced one frame by said film transport operation so that said display control renders the display elements in a particular display state in response to a signal from said detecting circuit.
Claim 10
Dependent Claim
100 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; (c) a film take-up loop-shaped display portion arranged at another end of the row of said display elements; and (d) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from the nearest one to the cartridge-shaped display portion to the take-up loop-shaped display portion, when the film is being wound up.
Claim 11
Dependent Claim
100 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; (c) a film take-up loop-shaped display portion arranged at another end of the row of said display elements; and (d) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from the nearest one to the cartridge-shaped display portion to the take-up loop-shaped display portion, when the film is being wound up.
Claim 12
Dependent Claim
79 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; and (c) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from the nearest one to the cartridge-shaped display portion to farther ones when the film is being wound up.
Claim 13
Dependent Claim
79 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of the row of said display elements; and (c) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from the nearest one to the cartridge-shaped display portion to farther ones when the film is being wound up.
Claim 14
Dependent Claim
81 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a film take-up loop-shaped display portion arranged at one end of the row of said display elements; and (c) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from a farther one from the display portion toward the display portion when the film is being wound up.
Claim 15
Dependent Claim
81 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a film take-up loop-shaped display portion arranged at one end of the row of said display elements; and (c) a drive circuit for driving at least said display elements when a film is transported, said circuit driving the display elements successively in a direction from a farther one from the display portion toward the display portion when the film is being wound up.
Claim 16
Dependent Claim
114 words
A display device for a camera comprising: (a) a plurality of display elements; (b) detecting means for detecting a film transport operation; (c) a display control circuit responsive to detection of the film transportation by said detecting means for successively changing the display pattern of said display elements, said circuit being arranged for causing said display elements to present a particular pattern when the film is transported one frame; (d) a film frame detector for detecting the number of frames transported; (e) a film frame display for displaying the frame number detected by said detector, said display being arranged for renewing the displayed frame number when said display elements show the aforesaid particular pattern.
Claim 17
Dependent Claim
114 words
A display device for a camera comprising: (a) a plurality of display elements; (b) detecting means for detecting a film transport operation; (c) a display control circuit responsive to detection of the film transportation by said detecting means for successively changing the display pattern of said display elements, said circuit being arranged for causing said display elements to present a particular pattern when the film is transported one frame; (d) a film frame detector for detecting the number of frames transported; (e) a film frame display for displaying the frame number detected by said detector, said display being arranged for renewing the displayed frame number when said display elements show the aforesaid particular pattern.
Claim 18
Dependent Claim
84 words
A display device according to claim 9, wherein said camera includes a detecting circuit for detecting the fact that the film has been transported one frame, said display control is arranged for causing said display elements to change their display pattern to the aforesaid particular one when the completion of the one-frame transportation of the film is detected by said detected circuit, and said display is arranged for renewing the displayed frame number in response to the aforesaid detecting operation of said detecting circuit.
Claim 19
Dependent Claim
132 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of said row of display elements; and (c) a drive circuit for driving at least said display elements when film is being transported, said drive circuit shifting said display elements from a display state to a non-display state, one after another, from one of said display elements located farthest from the cartridge-shaped display portion while the film is being rewound and indicating progress in the rewinding by shifting the display elements, one by one, from the display state to the non-display state in the direction toward the cartridge-shaped display portion to decrease the number of display elements which are in the display state in said direction.
Claim 20
Dependent Claim
132 words
A display device for a camera comprising: (a) a plurality of display elements arranged in a row; (b) a cartridge-shaped display portion arranged at one end of said row of display elements; and (c) a drive circuit for driving at least said display elements when film is being transported, said drive circuit shifting said display elements from a display state to a non-display state, one after another, from one of said display elements located farthest from the cartridge-shaped display portion while the film is being rewound and indicating progress in the rewinding by shifting the display elements, one by one, from the display state to the non-display state in the direction toward the cartridge-shaped display portion to decrease the number of display elements which are in the display state in said direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |