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EP0456012B1
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EP
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Display control device for reducing power consumption
Assignee: Mitsubishi Electric Corp
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Filing: 1991-04-17
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Granted: 1996-02-28
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Expires: 2011-04-17
Abstract
No abstract record available.
Inventors
- 👤 Yasuo c/o Computer Seisakusho Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 12:23
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: 5
Claim 1
Independent Claim
157 words
A display control device including a display controller (1) for receiving input data storing it in a memory (3), sequentially reading the data stored in the memory (3) and transmitting it to a display unit (4), comprising timer means (5) for generating an output at the time when a predetermined period of time has lapsed, characterized in that said timer means (5) generates an output after a predetermined period from the time of the data being written in said memory (3), that gate means (7,8) are inserted in a signal line (4a-c) connecting said display controller (1) and said display unit (4); and control means (6) are provided for closing said gate means (7,8) in response to the output of said timer means (5) so as to disable said display unit (4), and for opening said gate means (7,8) in response to the writing of the data in said memory (3) to enable said display unit (4).
Claim 2
Dependent Claim
54 words
A control device as set forth in Claim 1, wherein said timer means is a counter (5) which is reset in response to the writing of the data in said memory (3) and provides an output signal when said counter (5) has counted up to a value corresponding to the predetermined period of time.
Claim 3
Dependent Claim
59 words
A control device as set forth in Claim 1 or 2, wherein said display unit is an LCD panel (4), and said control means (6) is operable to receive the output from said counter (5) for disabling the backlight of said LCD panel and to detect the writing of the data in said memory (3) for enabling said backlight.
Claim 4
Dependent Claim
58 words
A control device as set forth in Claim 1, 2 or 3, wherein said display controller (1) and said LCD panel (4) are connected by a signal line (4b) for transmitting a data shift clock as well as by a signal line (4c) for transmitting LCD data, said gate means (7,8) being inserted in these signal lines (4b,4c).
Claim 5
Dependent Claim
155 words
A display control device as set forth in Claim 1, characterized in that said display controller is a display controller-kernel unit (1), storing input data in a memory, sequentially reading the stored data from said memory (3) and displaying it on said display unit, said control device comprising: a counter (5) which is reset when a signal indicating writing of data in said memory (3) is detected to output a counter signal when a predetermined value has been counted; a display control circuit (6) for outputting a control signal so as to close a gate (7,8) inserted in a signal line (4a-c) between said display controller-kernel unit (1) and said display unit (4) in response to said counter signal to interrupt said signal line and turn off the backlight of said display unit (4); and means (6) 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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