EP0456012A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Display control device for reducing power consumption
Assignee: Mitsubishi Electric Corp
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Filing: 1991-04-17
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Granted: —
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Expires: 2011-04-17
Abstract
Abstract A display control device for receiving input data at a display controller-kernel unit, storing it in a memory, sequentially reading the stored data from the memory and displaying it on a display unit. The control device comprises a counter which is reset when a signal indicating writing of data in the memory is detected to output a counter signal when a predetermined value is counted, a display control circuit for outputting a control signal so as to close a gate inserted in a signal line between the display controller-kernel unit and the display unit in response to the counter signal to interrupt the signal line and turn off the backlight of the display unit, and means for invalidating the control signal when the fact that a signal is written in the memory is detected.
Inventors
- 👤 Yasuo c/o Computer Seisakusho Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 02:01
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/26; G06F1/32; G06F1/3203; G06F1/3206; G06F1/3215; G06F1/3218; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/36; G09G2330/00; G09G2330/02; G09G2330/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
A display control device for storing input data in a memory, sequentially reading the stored data and displaying it on a display unit, said control device comprising: timer means for detecting the fact that no data is written in said memory for a predetermined period of time; and control means for disabling said display unit in response to the output of said timer means; whereby a power consumption of said display unit is reduced.
Claim 2
Dependent Claim
51 words
A control device as set forth in Claim 1, wherein said timer means is a counter which is reset in response to the writing of the data in said memory and provides an output signal when said counter has counted up to a value corresponding to the predetermined period of time.
Claim 3
Dependent Claim
49 words
A control device as set forth in Claim 2, further comprising gate means inserted in a signal line connecting said memory and said display unit, said control means being operable to close said gate means and disable said display unit in response to the signal output from said counter.
Claim 4
Dependent Claim
32 words
A control device as set forth in Claim 3, wherein said display unit is an LCD panel and said control means is operable to turn off the backlight of said LCD panel.
Claim 5
Dependent Claim
125 words
A display control device including a display controller for receiving input data storing it in a memory, sequentially reading the data stored in the memory and transmitting it to a display unit, said control device comprising: timer means for generating an output at the time when a predetermined period of time has lapsed from the time of the data being written in said memory; gate means inserted in a signal line connecting said display controller and said display unit; and control means for closing said gate means in response to the output of said timer means so as to disable said display unit, and for opening said gate means in response to the writing of the data in said memory to enable said display unit.
Claim 6
Dependent Claim
51 words
A control device as set forth in Claim 5, wherein said timer means is a counter which is reset in response to the writing of the data in said memory and provides an output signal when said counter has counted up to a value corresponding to the predetermined period of time.
Claim 7
Dependent Claim
53 words
A control device as set forth in Claim 6, wherein said display unit is an LCD panel, and said control means is operable to receive the output from said counter for disabling the backlight of said LCD panel and to detect the writing of the data in said memory for enabling said backlight.
Claim 8
Dependent Claim
49 words
A control device as set forth in Claim 7, wherein said display controller and said LCD panel are connected by a signal line for transmitting a data shift clock as well as by a signal line for transmitting LCD data, said gate means being inserted in these signal lines.
Claim 9
Dependent Claim
135 words
A display control device for receiving input data at a display controller-kernel unit, storing it in a memory, sequentially reading the stored data from said memory and displaying it on a display unit, said control device comprising: a counter which is reset when a signal indicating writing of data in said memory is detected to output a counter signal when a predetermined value has been counted; a display control circuit for outputting a control signal so as to close a gate inserted in a signal line between said display controller-kernel unit and said display unit in response to said counter signal to interrupt said signal line and turn off the backlight of said display unit; and means for invalidating said control signal when the fact that a signal is written in said memory is detected.
References Cited (Backward Citations)
No citation records indexed.
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