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US 5,394,166 AGranted
Electronic device
AssigneeCanon Kabushiki Kaisha
InventorKazutoshi Shimada
Life of this patent
Estimating the term…
Abstract
In order to display the information useful for a user on a display screen at all times while saving the power for displaying, a CPU re-edits an image data stored in a VRAM into a 1/4 screen and activates a display driver for the 1/4 screen if the display of one frame of image has been completed. The CPU sets the values of a clock required to scan one line and one frame to a first register and a second register respectively. A load timing controller and a frame signal controller determine the size of screen displayed by the values set in the registers. Thus, there is provided a device on which appropriately edited data is displayed in a small screen.
Claims22
An electronic device having an image display unit, comprising:
- partial display means for activating only a part of a display screen and displaying an image on the activated portion of the display screen;
- and
- control means for controlling switching between a partial display by said partial display means and a normal display with a full display screen.
An electronic device, comprising:
- display means for displaying a dot matrix image;
- means for variably controlling the number of lines or rows for actual use in driving the display of the dot matrix image on said display means, with a portion of said display means not being used to display the dot matrix image not being activated;
- and
- compression means for compressing image data, wherein
- the display area for actual use in driving the display with said display means is reduced in accordance with a predetermined control condition, and the image data compressed by said compression means is displayed in said reduced display area.
2 more elements
An electronic device, comprising:
- input means for inputting information to be displayed;
- storage means for storing information input from said input means;
- first control means for controlling the display of information stored in said storage means;
- compression means for compressing the information stored in said storage means;
- second control means for controlling the display of information compressed by said compression means;
- display means for displaying respective information controlled by said first control means or said second control means;
- a timer for timing a duration of a period during which there is no input from said input means;
- and
- means for displaying the information on said display means by switching from said first control means to said second control means when a value of the duration timed by said timer reaches a predetermined value.
6 more elements
An electronic device, comprising:
- input means for inputting information to be displayed;
- storage means for storing the information input from said input means;
- first control means for controlling the display of information stored in said storage means;
- compression means for compressing the information stored in said storage means;
- second control means for controlling the display of information compressed by said compression means;
- and
- display means for displaying the information controlled by said second control means if said input means is not operated for a predetermined period of time.
4 more elements
A method for displaying information, including the steps of:
- inputting information to be displayed;
- storing the input information in storage means;
- controlling the display of information stored in the storage means in a first control step;
- compressing the information stored in the storage means by compression means;
- controlling the display of information compressed by the compression means in a second control step;
- displaying respective information controlled in the first control step or in the second control step;
- timing a duration of a period of time during which no information is input in the input step;
- and
- displaying information by switching from the first control step to the second control step when a value of the duration timed in the timing step reaches a predetermined value.
6 more elements
An electronic device, comprising:
- input means for inputting information to be displayed;
- storage means for storing the information input from said input means;
- first control means for controlling the display of information stored in said storage means;
- designating means for designating a part of the information stored in said storage means;
- second control means for controlling the display of part of the information designated by said designation means;
- display means for displaying information controlled by said first control means or said second control means;
- a timer for timing a duration of a period of time during which no information is input from said input means;
- and
- means for displaying the information on said display means by switching from said first control means to said second control means when a value of the duration timed by said timer reaches a predetermined value, wherein
- said second control means includes means for activating a part of said display means and de-activating the remainder thereof.
7 more elements
An electronic device, comprising:
- storage means for storing information to be displayed;
- a plurality of drive means for driving a display screen on the basis of the information;
- drive control means for controlling said drive means;
- switch means for switching between a first mode and a second mode;
- and
- mode control means for activating said plurality of drive means in the first mode, and for activating a part of said plurality of drive means and deactivating the remainder thereof in the second mode.
3 more elements
A method for displaying information, comprising the steps of:
- inputting information to be displayed;
- storing the input information in storage means;
- controlling the display of information stored in the storage means in a first control step;
- designating a part of the information stored in the storage means;
- controlling the display of part of the information designated in a second control step, said second control step including the step of activating a part of the information designated in the designating step and deactivating the remainder thereof;
- displaying information controlled in the first control step or in the second control step;
- timing the duration of time during which no information is input in the input step;
- and
- displaying the information by switching from the first control step to the second control step when the duration of time reaches a predetermined value.
6 more elements
Dependencies are inferred from the claim text.