Patent US4556876A successfully refreshed from Google Patents.
US4556876A
Expired / Lapsed
US
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Display device with delay time compensation
Assignee: Mitsubishi Electric Corp
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Filing: 1982-09-15
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Granted: 1985-12-03
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Expires: 2002-09-15
Abstract
Abstract According to the present invention, the driving timing for each segment in a segment type digital display unit can be controlled independently on the basis of either one or both of the lighting history of each segment stored in a memory section and a detected temperature from a temperature detector mounted near segments. Therefore, the discriminatability particularly at low temperatures can be improved with little influence of the temperature and lighting history of segments.
Inventors
- 👤 Osamu Shimizu
- 👤 Hirofumi Goto
- 👤 Fumio Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:00
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/133382; G09; G09G; G09G3/00; G09G3/04; G09G3/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, a temperature detector for detecting the temperature adjacent said display unit, and a control section having means coactive with said memory section and said temperature detector for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment and in response to a temperature detector output corresponding to a detected temperature, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
Claim 2
Dependent Claim
121 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, a temperature detector for detecting the temperature adjacent said display unit, and a control section having means coactive with said memory section and said temperature detector for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment and in response to a temperature detector output corresponding to a detected temperature, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
Claim 3
Dependent Claim
20 words
A display device with delay time compensation according to claim 1, wherein said each segment is constructed of liquid crystal.
Claim 4
Dependent Claim
20 words
A display device with delay time compensation according to claim 1, wherein said each segment is constructed of electrochromic material.
Claim 5
Dependent Claim
52 words
A display device with delay time compensation according to claim 1, in which said control section means comprises delay means for delaying the driving timing for each segment at the time of renewal of display on the basis of at least two preceding ON or OFF histories stored in said memory section.
Claim 6
Dependent Claim
59 words
A display device with delay time compensation according to claim 4, wherein the delay means of said control section has means to effect delay time effects time delays for effective renewal of segments in dependence upon OFF history thereof and the time delay is longer for segments having a shorter OFF history than those having a longer OFF history.
Claim 7
Dependent Claim
50 words
A display device with delay time compensation according to claim 4, wherein the delay means of said control section comprises means to effect delay time delay for effective renewal of said segments in dependence upon detected temperatures from the temperature detector, and the time delay is longer for low temperatures.
Claim 8
Dependent Claim
45 words
A display device with delay time compensation according to claim 6, wherein the delay means comprises means to effect delay time at lower detected temperatures from the temperature detector effective so that all segments turning from OFF to ON are discriminatable about the same time.
Claim 9
Dependent Claim
28 words
A display device with delay time compensation according to claim 4, wherein the control section means comprises means for making display holding time of the display unit constant.
Claim 10
Dependent Claim
31 words
A display device with delay time compensation according to claim 4, wherein the control section means comprises means for making time from a display renewal to the next display renewal constant.
Claim 11
Dependent Claim
61 words
A display device with delay time compensation according to claim 4, in which the control section means comprises means effective when a segment which was ON just before a display renewal is to be again turned ON for display renewal, effects the display renewal while retaining the ON state if it is just before the display renewal of the corresponding segment.
Claim 12
Dependent Claim
73 words
A display device with delay time compensation according to claim 4, in which said control section means comprises means effective when a segment which was ON just before a display renewal is to be again turned ON outputs an OFF effecting signal at the time of the display renewal generates an ON effecting signal after the time of the display renewal at a time according to the detected temperature from the temperature detector.
Claim 13
Dependent Claim
65 words
A display device with delay time compensation according to claim 1, in which said control section means comprises means effective such that when the contents of a display just before a display renewal and the contents of the display about to be displayed are coincident with each other, segment driving output is not changed at all and is continued before and after the display renewal.
Claim 14
Dependent Claim
121 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, a temperature detector for detecting the temperature adjacent said display unit, and a control section having means coactive with said memory section and said temperature detector for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment and in response to a temperature detector output corresponding to a detected temperature, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
Claim 15
Dependent Claim
121 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, a temperature detector for detecting the temperature adjacent said display unit, and a control section having means coactive with said memory section and said temperature detector for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment and in response to a temperature detector output corresponding to a detected temperature, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
Claim 16
Dependent Claim
93 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, and a control section having means coactive with said memory section for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
Claim 17
Dependent Claim
93 words
A display device with delay time compensation having a segment type digital display unit, comprising a memory section for storing activation history for each segment in said display unit, and a control section having means coactive with said memory section for controlling the driving timing independently for each segment in said display unit as a function of individual activation history of the corresponding segment, thereby to effect compensated values of time of energization of each individual segment to effectuate substantially simultaneous display renewal of each individual segment and discriminability at the same time.
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) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |