Electronic device

Claim 2

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.

Claim 3

The electronic device according to claim 1, further comprising image edit means for picking up and re-editing a portion of an image normally displayed to create the image displayed with said partial display means.

Claim 4

The electronic device according to claim 1, wherein said control means decreases the frequency of data transfer clock.

Claim 5

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.

Claim 6

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.

Claim 7

The electronic device according to claim 4, further comprising means for variably controlling a control clock frequency of said display means.

Claim 8

The electronic device according to claim 4, further comprising means for performing the smoothing of an image data as well as the compression of the image data in said reduced display area.

Claim 9

The electronic device according to claim 5, further comprising means for performing the smoothing of an image data as well as the compression of the image data in said display region at the reduction.

Claim 10

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.

Claim 11

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.

Claim 12

The electronic device according to claim 8, wherein said second control means has means for compressing the information by giving respective weights to a plurality of pixels constituting the information.

Claim 13

The electronic device according to claim 8, wherein said second control means has means for activating a part of said display means and deactivating the remainder thereof.

Claim 14

The electronic device according to claim 8, further comprising means for displaying the information on said display means by switching between said first control means and said second control means.

Claim 15

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.

Claim 16

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.

Claim 19

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.

Claim 20

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.

Claim 21

The electronic device according to claim 14, further comprising means for switching from the information being displayed by the control of said second control means to information to be displayed by the control of said first control means.

Claim 22

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.

Claim 23

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.

Claim 24

The electronic device according to claim 16, further comprising timer means for timing an interval between operations in the first mode, wherein said switch means switches from the first mode to the second mode after a predetermined time interval has passed.

Claim 25

The electronic device according to claim 16, further comprising edit means for editing the information to be displayed, and when the second mode is selected by said switch means, said drive control means controls said drive means on the basis of said edited information.

Claim 26

The electronic device according to claim 16, further comprising compression means for compressing the information, and when the second mode is selected by said switch means, said drive control means controls said drive means on the basis of said compressed information.

Claim 27

The electronic device according to claim 16, further comprising designation means for designating a part of the information, and when the second mode is selected by said designation means, said drive control means controls said drive means on the basis of said designated information.

Claim 30

The method according to claim 21, further comprising the step of switching from the displayed information controlled in the second control step to information controlled in the first control step to be displayed.