Patent US4713659A successfully refreshed from Google Patents.
US4713659A
Expired / Lapsed
US
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Pager with display
Assignee: NEC Corp
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Filing: 1985-07-12
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Granted: 1987-12-15
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Expires: 2005-07-12
Abstract
Abstract A pager with a passive display, for example, a liquid crystal display, also has a sensor for sensing ambient light levels. The display is automatically illuminated when the ambient light level falls below a given threshold and the sensor is then either altered to detect a higher light level or disabled for a given time period so that the illumination does not falsely affect the sensor.
Inventors
- 👤 Takashi Oyagi
- 👤 Kazuyuki Tsunoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:28
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/13306; G02F1/13318; G08; G08B; G08B3/00; G08B3/10; G08B3/1008; G08B3/1016; G08B5/00; G08B5/22; G08B5/222; G08B5/223; G08B5/224; G08B5/225; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133618
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
181 words
A display pager, comprising: data processing means for processing a received signal to generate an information signal, and for generating a control signal; display means for optically diplaying on the display alphanumeric characters corresponding to the information signal output by said data processing means; light sensor means for sensing an external luminance level in the vicinity of said display means and for applying a first sense signal to the data processing means when said luminance level is lower than a first predetermined value, and for applying a second sense signal to the data processing means when said luminance level is above a second predetermined value which is higher than said first predetermined value; and illuminating means for illuminating the display means in response to the control signal output from the data processing means, said illuminating means including a lamp; the data processing means generating said control signal in response to said first sense signal during the operation of the display of the display means and controlling said illuminating means to turn off said lamp in response to said second sense signal.
Claim 2
Dependent Claim
181 words
A display pager, comprising: data processing means for processing a received signal to generate an information signal, and for generating a control signal; display means for optically diplaying on the display alphanumeric characters corresponding to the information signal output by said data processing means; light sensor means for sensing an external luminance level in the vicinity of said display means and for applying a first sense signal to the data processing means when said luminance level is lower than a first predetermined value, and for applying a second sense signal to the data processing means when said luminance level is above a second predetermined value which is higher than said first predetermined value; and illuminating means for illuminating the display means in response to the control signal output from the data processing means, said illuminating means including a lamp; the data processing means generating said control signal in response to said first sense signal during the operation of the display of the display means and controlling said illuminating means to turn off said lamp in response to said second sense signal.
Claim 3
Dependent Claim
28 words
A pager as claimed in claim 1, wherein said data processing means turns off said lamp when the operation of the display of the display means is terminated.
Claim 4
Dependent Claim
152 words
A display pager comprising: data processing means for processing a received signal to generate an information signal and for generating a control signal; display means for optically displaying on the display alphanumeric characters corresponding to the information signal output by said data processing means; light sensor means for sensing an external luminance level in the vicinity of said display means, said sensor means applying a first sense signal to the data processing means when said external luminance level is lower than a first predetermined value; illuminating means for illuminating the display means in response to the control signal output from the data processing means, said illuminating means including a lamp; and timer means triggered by said control signal for inhibiting the sensing operation of the light sensor means until the expiration of a predetermined period of time, the data processing means generating said control signal in response to said first sense signal.
Claim 5
Dependent Claim
152 words
A display pager comprising: data processing means for processing a received signal to generate an information signal and for generating a control signal; display means for optically displaying on the display alphanumeric characters corresponding to the information signal output by said data processing means; light sensor means for sensing an external luminance level in the vicinity of said display means, said sensor means applying a first sense signal to the data processing means when said external luminance level is lower than a first predetermined value; illuminating means for illuminating the display means in response to the control signal output from the data processing means, said illuminating means including a lamp; and timer means triggered by said control signal for inhibiting the sensing operation of the light sensor means until the expiration of a predetermined period of time, the data processing means generating said control signal in response to said first sense signal.
Claim 6
Dependent Claim
25 words
A pager as claimed in claim 3, further comprising means for reactivating said light sensor means upon the expiration of said predetermined period of time.
Claim 7
Dependent Claim
24 words
A pager as claimed in claim 3, further comprising means for turning off the lamp upon the expiration of said predetermined period of time.
Claim 8
Dependent Claim
121 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicinity of said display means and producing a first sense signal when said external luminance level falls below a first predetermined level, and producing a second sense signal when said external luminance level exceeds a second predetermined level after said first sense signal has been produced, said second predetermined level being higher than said first predetermined level; means for illuminating said display means; and control means for turning on said illuminating means in response to said first sense signal during the display of said message on said display means and for turning off said illuminating means in response to said second sense signal.
Claim 9
Dependent Claim
121 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicinity of said display means and producing a first sense signal when said external luminance level falls below a first predetermined level, and producing a second sense signal when said external luminance level exceeds a second predetermined level after said first sense signal has been produced, said second predetermined level being higher than said first predetermined level; means for illuminating said display means; and control means for turning on said illuminating means in response to said first sense signal during the display of said message on said display means and for turning off said illuminating means in response to said second sense signal.
Claim 10
Dependent Claim
50 words
A pager as claimed in claim 6, further comprising: means for receiving a paging signal followed by said message; and means for detecting coincidence between a call number represented by said paging signal and a call number assigned to said pager and for outputting said message subsequent to said detection.
Claim 11
Dependent Claim
14 words
A pager as claimed in claim 6, wherein said illuminating means comprises a lamp.
Claim 12
Dependent Claim
26 words
A pager as claimed in claim 6, wherein said sensing means comprises a phototransistor and a Schmitt trigger circuit connected to an output of said phototransistor.
Claim 13
Dependent Claim
14 words
A pager as claimed in claim 6, wherein said control means comprises a microprocessor.
Claim 14
Independent Claim
83 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is being displayed on said display and the sensed external luminance level falls below a first predetermined level; and terminating the illumination of said display when said sensed external luminance level exceeds a second predetermined level which is higher than said first predetermined level.
Claim 15
Independent Claim
83 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is being displayed on said display and the sensed external luminance level falls below a first predetermined level; and terminating the illumination of said display when said sensed external luminance level exceeds a second predetermined level which is higher than said first predetermined level.
Claim 16
Dependent Claim
53 words
A method as claimed in claim 11, further comprising the steps of: receiving a paging signal followed by said message; and comparing a call number represented by said paging signal with a call number assigned to said pager and providing said message for said display when said call nubmers coincide with each other.
Claim 17
Dependent Claim
70 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicintity of said display means; means for illuminating said display means when said message is being displayed on said display means and the sensed external luminance level falls below a predetermined level; and control means for deactivating said sensing means until the display of said message on said display means is terminated.
Claim 18
Dependent Claim
70 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicintity of said display means; means for illuminating said display means when said message is being displayed on said display means and the sensed external luminance level falls below a predetermined level; and control means for deactivating said sensing means until the display of said message on said display means is terminated.
Claim 19
Dependent Claim
50 words
A pager as claimed in claim 13, further comprising: means for receiving a paging signal followed by said message; and means for detecting coincidence between a call number represented by said paging signal and a call number assigned to said pager and for outputting said message subsequent to said detection.
Claim 20
Dependent Claim
14 words
A pager as claimed in claim 13, wherein said illuminating means comprises a lamp.
Claim 21
Dependent Claim
26 words
A pager as claimed in claim 13, wherein said sensing means comprises a phototransistor and a Schmitt trigger circuit connected to an output of said phototransistor.
Claim 22
Dependent Claim
14 words
A pager as claimed in claim 13, wherein said control means comprises a microprocessor.
Claim 23
Independent Claim
74 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is being displayed on said display and the sensed external luminance level falls below a predetermined level; and thereafter discontinuing said sensing step until the display of said message on said display means is terminated.
Claim 24
Independent Claim
74 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is being displayed on said display and the sensed external luminance level falls below a predetermined level; and thereafter discontinuing said sensing step until the display of said message on said display means is terminated.
Claim 25
Dependent Claim
53 words
A method as claimed in claim 18, further comprising the steps of: receiving a paging signal followed by said message; and comparing a call number represented by said paging signal with a call number assigned to said pager and providing said message for said display when said call numbers coincide with each other.
Claim 26
Dependent Claim
73 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicinity of said display means; means for illuminating said display means when said message is being displayed on said display means and the sensed external luminance level falls below a predetermined level; and control means for deactivating said sensing means for a predetermined time after the sensed external luminance level falls below said predetermined level.
Claim 27
Dependent Claim
73 words
A pager, comprising: display means for displaying a message; means for sensing an external luminance level in the vicinity of said display means; means for illuminating said display means when said message is being displayed on said display means and the sensed external luminance level falls below a predetermined level; and control means for deactivating said sensing means for a predetermined time after the sensed external luminance level falls below said predetermined level.
Claim 28
Dependent Claim
50 words
A pager as claimed in claim 20, further comprising: means for receiving a paging signal followed by said message; and means for detecting coincidence between a call number represented by said paging signal and a call number assigned to said pager and for outputting said message subsequent to said detection.
Claim 29
Dependent Claim
14 words
A pager as claimed in claim 20, wherein said illuminating means comprises a lamp.
Claim 30
Dependent Claim
26 words
A pager as claimed in claim 20, wherein said sensing means comprises a phototransistor and a Schmitt trigger circuit connected to an output of said phototransistor.
Claim 31
Dependent Claim
14 words
A pager as claimed in claim 20, wherein said control means comprises a microprocessor.
Claim 32
Independent Claim
70 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is displayed on said display and the sensed external luminance level falls below a predetermined level; and thereafter discontinuing said sensing step until the expiration of a predetermined period of time.
Claim 33
Independent Claim
70 words
A method of controlling the illumination of a display of a pager, comprising the steps of: displaying a message on said display; sensing an external luminance level in the vicinity of said display; illuminating said display when said message is displayed on said display and the sensed external luminance level falls below a predetermined level; and thereafter discontinuing said sensing step until the expiration of a predetermined period of time.
Claim 34
Dependent Claim
53 words
A method as claimed in claim 25, further comprising the steps of: receiving a paging signal followed by said message; and comparing a call number represented by said paging signal with a call number assigned to said pager and providing said message for said display when said call numbers coincide with each other.
References Cited (Backward Citations)
US3937004A
Cited
US3849979A
Cited
JPS5656046A
Cited
US4536761A
Cited
DE3210800A1
Cited
US4644350A
Cited
JPH105329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |