Electronic device
First Claim
Patent Images
1. 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.
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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.
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Citations
22 Claims
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1. An electronic device having an image display unit, comprising:
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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. - View Dependent Claims (2, 3)
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4. An electronic device, comprising:
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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. - View Dependent Claims (5, 6, 7)
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8. An electronic device, comprising:
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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. - View Dependent Claims (9, 10, 11)
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12. An electronic device, comprising:
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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.
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13. A method for displaying information, including the steps of:
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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.
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14. An electronic device, comprising:
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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. - View Dependent Claims (15)
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16. An electronic device, comprising:
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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. - View Dependent Claims (17, 18, 19, 20)
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21. A method for displaying information, comprising the steps of:
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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. - View Dependent Claims (22)
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Specification