JPH087653B2 - Electronics - Google Patents

Description

The present invention relates to an electronic device having display means such as an electronic notebook and an electronic memo.

(Prior Art) Electronic devices such as an electronic notebook and an electronic memo can retrieve stored data (for example, a person's name and its telephone number) and display the content on a display unit such as a liquid crystal display device. it can. When a predetermined key (character key or the like, hereinafter referred to as "data key") provided in the electronic device is operated, the display content of the display means is rewritten. Therefore, when trying to make a call while looking at the displayed telephone number, if the data key is operated by mistake, the displayed telephone number may change and the number may not be known. .

Therefore, in the conventional electronic device of this type, either one of the following two types of measures is taken. The first is
The operation of the data key is invalid while the data is displayed. The second is a method of calling the original data by performing a special key operation when the display content is accidentally changed.

(Problems to be solved by the invention) In the first measure, when a new data is to be input, a predetermined key operation (for example, pressing a clear key)
To cancel the data key operation disabled mode. Therefore, there is a problem that the key operation is troublesome. Furthermore, it may not be possible to disable all data key operations due to problems in key operation.

Further, with the second countermeasure, there remains a problem that the display is changed first when a special key operation is performed. Furthermore, if the character key of the data keys is pressed by mistake, the display can be recalled by a special key operation, but if the data key other than the character key is operated by mistake, the data is recalled. There is a need.

The problems common to the above-mentioned first and second measures are as follows. That is, if the data recall key is operated by mistake, another data will be recalled and displayed. Therefore, in order to display the previous display data, it is necessary to retrieve that data again.

Therefore, an object of the present invention is to provide an electronic device in which the content displayed on the display means can be fixed by a simple operation, so that there is little risk of accidentally erasing the display and the fixed state is easily released. To do.

(Means for Solving the Problem) An electronic device of the present invention is an electronic device having a display means capable of displaying data and a plurality of key input means capable of rewriting at least a part of the display content of the display means by an operation. And a display fixing means for setting a display fixing state for fixing the display content of the display means, and a predetermined key inputting means of the plurality of key inputting means when the display fixing state is set. The above-mentioned object is achieved by providing the key input selection means for validating only the operation of (1) and invalidating the operation of the other key input means of the plurality of key input means.

Further, when the display fixed state is set, a means for inverting the display may be further provided.

Auto power off (APO) or O when display is fixed
When the power is turned off by operating the FF key, the next time the power is turned on, the display contents in the display fixed state are automatically displayed, and a means for setting the display fixed state may be further provided. it can.

(Examples) The present invention will be described below with reference to Examples.

FIG. 3 shows an embodiment of the present invention. The present embodiment is a small electronic device called an electronic notebook, which is provided with a 32 × 96 dot liquid crystal display (LCD) 1 and a keyboard 2 on the upper surface of the main body as display means. Keyboard 2
Mode selection key group 2a for selecting the mode in which each application program is executed, and character key group 2b including kana key and number key, clear key 2c, power OFF
Keys 2d etc. are provided. Further, in this embodiment, a display fixing key 2e for setting and releasing the display fixing state is also provided.

FIG. 4 shows a block diagram of this electronic notebook. LCD1 is LC
It is connected to the CPU 4 via the D driver 3. ROM 6 and RAM 7 are connected to the CPU 4 via the gate array 5, and a speaker 9 is connected via the tone generator 8. CP
Keyboard 2 is also connected to U4. ROM6, CPU4
A basic program and a plurality of application programs for operating are stored. The RAM 7 stores various data written by the user in each application program in a predetermined area. The RAM 7 is backed up by a battery (not shown) so that the stored data is not lost.

The operation of this embodiment will be described with reference to the flowchart shown in FIG.

Hereinafter, a case where this electronic notebook is used as a telephone directory will be described as an example. First, in the mode selection key 2a group,
Press the "phone" key 21 (step S1). In step S2, it is determined whether or not the display fixed state is set. Since the display fixed state has not been set yet, step
In S3, it is determined whether the display fixed key 2e is pressed. Since the fixed display key 2e was not pressed, normal key processing is performed and the phonebook mode is set (step
S4), steps S1 to S4 are repeated until the display fixing key 2e is pressed to search for a person's name or telephone number and display a desired telephone number. That is, the character key 2b and the call key 2f are used to search for the desired person's name, and the LCD 1
To display. An example of the display is shown in FIG.

In this embodiment, when the display fixed mode is not set, the mode selection key group 2a, the character key group 2b, the clear key 2c, and the power OFF key 2d function as data keys. When any one of them is pressed, the content displayed on LCD1 changes. Therefore, when the display fixing key 2e is pressed to set the display fixed state, the process proceeds from step S3 to step S5 to set the fixed display state and LC
The display of D1 is changed from the normal display state shown in FIG. 5 to the inverted state shown in FIG. By reversing this display, it is easily recognized that the fixed display state is set.

The user looks at the telephone number displayed on LCD1
Dial the telephone. Or if you press the dial key 2g while the phone number is displayed on LCD1,
A tone signal corresponding to the telephone number is generated from the speaker 9, and dialing is automatically performed.

In this display fixed state, when any key other than the data key or the character key group 2b of the data keys is pressed, the step S7 is performed via the steps S2 and S6.
Then, the key operation is invalidated. Therefore, the display content of LCD1 does not change.

When you want to change the setting to another mode, change the display contents of LCD1, stop using the electronic notebook, etc., in the fixed state of the display, select the predetermined key in the data key (this embodiment Then, mode selection key group 2a, clear key 2
Press either c or the power OFF key 2d). As a result, the process proceeds from step S6 to step S8, the display of the LCD 1 is reversed from the state of FIG. 6 to restore the normal state of FIG. 5, and the fixed display state is released. The processing assigned to the pressed key is performed (step S9). However, when the power OFF key 2d is pressed in step S6, the display device is not restored and the display fixed state is not released, and the data of the display content of the LCD 1 and whether or not the display is fixed state are displayed. The power is turned off after the information is stored in the predetermined area of the RAM 7. This process is also performed when the APO process is performed.

When the power is turned off without releasing the fixed display state and then the power ON key 2h is pressed, the processing shown in FIG. 2 is performed.

When the power ON key 2h is pressed to use this electronic notebook, the normal ON processing is performed (step S11), then the RAM
It is determined by reading 7 whether or not the display is fixed (step S12). When the display is not fixed, the key input is awaited as in the case of a normal electronic notebook. If the display is in a fixed state, the data of the display content stored in the RAM 7 is read and checked (step S13), and it is determined whether the display is possible (step S14). If it cannot be displayed, the key input is awaited. When the data can be displayed, the data of the read display content is displayed on LCD1. Thus, in the present embodiment, the displayed contents are automatically displayed.

(Effects of the Invention) As is clear from the above description, in the electronic device of the present invention, the contents displayed on the display means can be fixed by a simple operation, so there is little risk of accidentally deleting the display, and It is easy to release the fixed state.

[Brief description of drawings]

1 and 2 are flowcharts showing the operation of the electronic notebook as an embodiment of the present invention, FIG. 3 is a plan view showing the appearance of the embodiment, FIG. 4 is a block diagram of the embodiment, and FIG. 5
FIG. 6 is a diagram showing a normal display state of the liquid crystal display device in that embodiment, and FIG. 6 is a diagram showing a display fixed state of the liquid crystal display device. 1 ... Liquid crystal display device, 2a ... Mode selection key group, 2b ... Character key group, 2e ... Display fixed key.

Claims (1)

[Claims] 1. An electronic device comprising display means capable of displaying data and a plurality of key input means capable of rewriting at least part of the display content of the display means by fixing the display content of the display means. Display fixing means for setting the display fixing state, and when the display fixing state is set, only the operation of a predetermined key input means of the plurality of key input means is enabled, and the plurality of keys An electronic device comprising key input selection means for invalidating the operation of other key input means of the input means.