Patent EP0448350A2 successfully refreshed from Google Patents.
EP0448350A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hand held data processing apparatus having reduced power consumption
Assignee: Panasonic Holdings Corp
•
Filing: 1991-03-19
•
Granted: —
•
Expires: 2011-03-19
Abstract
Abstract A data processing apparatus comprising: a data input unit (3) for input of external data; a first processing unit (1) for processing the data inputted through the data input unit; a second processing unit (98) for processing the data inputted through the data input unit and/or an output data of the first processing unit; and a display unit (99) for displaying an output data of the first and/or second processing units, wherein the display unit has a memory function (82) for keeping a display state without being energized, and the first processing unit has a means (6) for actuating the second processing unit according to a timing regime or the kind of the input data. Such apparatus reduces power consumption without affecting the required data processing operations.
Inventors
- 👤 Mitsuaki Oshima
- 👤 Yoshihiro Gohara
- 👤 Yoshinori Kobayashi
- 👤 Shozo Fujiwara
- 👤 Tsuyoshi Uemura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 22:14
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3206; G06F1/3215; G06F1/3218; G09; G09G; G09G5/00; G09G5/36; G09G2300/00; G09G2300/04; G09G2300/0469; G09G2300/0473; G09G2310/00; G09G2310/04; G09G2330/00; G09G2330/02; G09G2330/021; G09G2330/022; G09G2360/00; G09G2360/06; G09G2360/08; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G3/3611; G09G3/3622; G09G3/3629; G09G5/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
A data processing apparatus comprising: a data input unit for input of a data; a first processing unit for processing the data inputted through the data input unit; a second processing unit for processing an output data of the first processing unit; and a display unit for display of data processed at the first and/or second processing units on a display device having a memory function, said first processing unit having a means for selectively activating the second processing unit, which has been inactivated, according to data input through the data input unit.
Claim 2
Dependent Claim
19 words
A data processing apparatus according to Claim 1, wherein the display device is a ferroelectric liquid crystal display device.
Claim 3
Dependent Claim
35 words
A data processing apparatus according to Claim 1, wherein the first processing unit has a means for detecting that the processing of the second processing unit is completed and forcedly stopping the second processing unit.
Claim 4
Dependent Claim
21 words
A data processing apparatus according to Claim 1, wherein the first processing unit has a means for driving the display unit.
Claim 5
Dependent Claim
35 words
A data processing apparatus according to Claim 1, wherein the second processing unit has a means for generation of a display start signal which instructs the first processing unit to start driving the display unit.
Claim 6
Dependent Claim
21 words
A data processing apparatus according to Claim 1, wherein the second processing unit has a means for driving the display unit.
Claim 7
Dependent Claim
26 words
A data processing apparatus according to Claim 1, wherein the second processing unit has a means for stopping itself upon completion of its own processing action.
Claim 8
Dependent Claim
21 words
A data processing apparatus according to Claim 7, wherein the second processing unit has a means for driving the display unit.
Claim 9
Dependent Claim
26 words
A data processing apparatus according to Claim 8, wherein the second processing unit has a means for stopping itself upon completion of driving the display unit.
Claim 10
Dependent Claim
43 words
A data processing apparatus according to Claim 1, wherein the first processing unit has a means for driving the display unit and a means for delivering a display data to the display unit for change of a display state of the display unit.
Claim 11
Dependent Claim
21 words
A data processing apparatus according to Claim 10, wherein the second processing unit has a means for driving the display unit.
Claim 12
Dependent Claim
29 words
A data processing apparatus according to Claim 10, wherein the first processing unit has a means for storage of a portion of a display data of the display unit.
Claim 13
Dependent Claim
77 words
A data processing apparatus comprising: a data input unit for input of a data; a first processing unit for processing the data inputted through the data input unit; a second processing unit for processing an input data of the first processing unit; and a display unit having a memory-effect display device for display of data processed at the first and/or second processing units, said first or second processing unit having a means for driving the display unit.
Claim 14
Dependent Claim
23 words
A data processing apparatus according to Claim 13, wherein the first processing unit has a means for activating and/or inactivating the display unit.
Claim 15
Dependent Claim
24 words
A data processing apparatus according to Claim 13, wherein the display unit has a means for inactivating itself upon completion of its display action.
Claim 16
Dependent Claim
23 words
A data processing apparatus according to Claim 13, wherein the second processing unit has a means for activating and/or inactivating the display unit.
Claim 17
Dependent Claim
125 words
A data processing apparatus according to Claim 1, wherein the data input unit has at least a keyboard of which input signal is converted by the first processing unit to a input code signal and the second processing unit has a start device remaining activated uninterruptedly and a CPU arranged for intermittent activation so that, in operation, when receiving the input code signal, the start device actuates the CPU to commence processing a program and subsequently, the CPU after completion of a desired processing action stops processing the program at a keyboard input stand-by state with its clock turned off while saving a corresponding data in its internal register and starts it again from its keyboard input stand-by state when activated by the start device.
Claim 18
Dependent Claim
55 words
A data processing apparatus according to Claim 1, wherein the second processing unit has a CPU chip containing a register and an internal memory so that it can stop upon disconnection of a CPU clock signal with both the register and the internal memory saving data and start again when the clock signal is released.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.