US4408869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital display device controlled by a microcomputer
Assignee: Canon Inc
•
Filing: 1981-02-03
•
Granted: 1983-10-11
•
Expires: 2001-02-03
Abstract
Abstract There is disclosed a display device for a copier, such display unit being provided with a display generator which generates signals at a determined time interval. A microcomputer is provided with a program interruption port for receiving the signal from the signal generator and performs dynamic drive of the display unit by the signal. The dynamic display control is achieved by interruption signals externally supplied at a determined time interval to the computer. Therefore, a constant display drive timing is maintained regardless of the execution time of the main program and an ensured dynamic display control without flicker in display is obtained.
Inventors
- 👤 Masahiro Tomosada
- 👤 Katsuyoshi Maeshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5016; G06; G06F; G06F3/00; G06F3/14; G06F3/147; G09; G09G; G09G3/00; G09G3/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
65 words
A display device, comprising: a display unit; serial signal generating means for generating signals at predetermined time intervals; and a microcomputer coupled to control said display unit to provide a flashing display, said microcomputer having a program interruption port for receiving the signal from said serial signal generating means, wherein the flashes of said display are synchronized with said serial signal at a predetermined ratio.
Claim 2
Dependent Claim
65 words
A display device, comprising: a display unit; serial signal generating means for generating signals at predetermined time intervals; and a microcomputer coupled to control said display unit to provide a flashing display, said microcomputer having a program interruption port for receiving the signal from said serial signal generating means, wherein the flashes of said display are synchronized with said serial signal at a predetermined ratio.
Claim 3
Dependent Claim
20 words
A display device according to claim 1, wherein said display unit is adapted to display numbers relating to a copier.
Claim 4
Dependent Claim
35 words
A display device according to claim 2, wherein said display unit is composed of 7-segment display elements for displaying a set copy number or a copy number for use in conjunction with a copier machine.
Claim 5
Dependent Claim
19 words
A display device according to claim 1, wherein said display unit is adapted to display states of a copier.
Claim 6
Dependent Claim
24 words
A display device according to claim 4, wherein said display unit is a jam indicator lamp for use in conjunction with a copier machine.
Claim 7
Dependent Claim
104 words
A copying apparatus, comprising: image forming means for forming a reproduced image or an original on a recording member; input means for generating signals indicating copying conditions; display means for displaying states of copying; serial signal generating means for generating signals at predetermined time intervals; and a microcomputer provided with a program interruption port for receiving signals from said serial signal generating means and adapated for sensing the signals from said input means in response to said signals from said serial signal generating means, wherein the sensing of the signals from said input means is synchronized with said serial signal at a predetermined ratio.
Claim 8
Dependent Claim
104 words
A copying apparatus, comprising: image forming means for forming a reproduced image or an original on a recording member; input means for generating signals indicating copying conditions; display means for displaying states of copying; serial signal generating means for generating signals at predetermined time intervals; and a microcomputer provided with a program interruption port for receiving signals from said serial signal generating means and adapated for sensing the signals from said input means in response to said signals from said serial signal generating means, wherein the sensing of the signals from said input means is synchronized with said serial signal at a predetermined ratio.
Claim 9
Dependent Claim
23 words
A copying apparatus according to claim 6, wherein said display means is adapted to display a set copy number or a copy number.
Claim 10
Dependent Claim
18 words
A copying apparatus according to claim 6, wherein said input means is composed of a key input matrix.
Claim 11
Dependent Claim
33 words
A copying apparatus according to claim 6, wherein said microcomputer is further adapted for controlling the function of said image forming means in response to a second signal other than said serial signal.
Claim 12
Dependent Claim
23 words
A copying apparatus according to claim 9, wherein said period of the serial signal is longer than the period of said second signal.
Claim 13
Dependent Claim
23 words
A copying apparatus according to claim 9, wherein said period of the serial signal is shorter than a driving signal of said microcomputer.
Claim 14
Dependent Claim
31 words
A copying apparatus according to claim 9, wherein said image forming means has a photosensitive drum, and said second signal is generated in accordance with the rotation of said photosensitive drum.
Claim 15
Dependent Claim
23 words
A copying apparatus according to claim 12, wherein said period of the serial signal is longer than the period of said second signal.
Claim 16
Dependent Claim
23 words
A copying apparatus according to claim 12, wherein said period of the serial signal is shorter than a driving signal of said microcomputer.
Claim 17
Dependent Claim
29 words
A display device according to claim 1 having N display units, wherein said microcomputer causes said display units to flash at N times the period of said serial signal.
Claim 18
Dependent Claim
30 words
A copying apparatus according to claim 6, wherein said microcomputer further controls the flashing of said display means in accordance with said serial signal from said serial signal generating means.
Claim 19
Dependent Claim
24 words
A copying apparatus according to claim 16, wherein said flashes of the display means are synchronized with said serial signal at a predetermined ratio.
Claim 20
Dependent Claim
66 words
A display device comprising: display means having a first display element and a second display element, serial signal generating means for generating signals at predetermined time intervals, and a microcomputer provided with a program interruption port for receiving the signal from said serial signal generating means, wherein said microcomputer drives in turn said first display element and second display element in accordance with said serial signal.
Claim 21
Dependent Claim
66 words
A display device comprising: display means having a first display element and a second display element, serial signal generating means for generating signals at predetermined time intervals, and a microcomputer provided with a program interruption port for receiving the signal from said serial signal generating means, wherein said microcomputer drives in turn said first display element and second display element in accordance with said serial signal.
Claim 22
Dependent Claim
19 words
A display device according to claim 18, wherein said first and second display elements are seven segment displays respectively.
Claim 23
Dependent Claim
44 words
A display device according to claim 19, wherein said first and second display elements display respectively 1's and 10's digits, for use in conjunction with a copier machine to display the number of sheets which are to be copied or set to be copied.
Claim 24
Dependent Claim
23 words
A display device according to claim 20, wherein said microcomputer drives said first display element after the driving of said second display element.
References Cited (Backward Citations)
US4099860A
Cited
US4035072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |