JP3259879B2 - Electronic device having key input unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a key input unit such as a display device and a monitor device, and more particularly to a key input suitable for use in a public place where an unspecified number of people operate keys. The present invention relates to an electronic device having a unit.

[0002]

2. Description of the Related Art In recent years, electronic devices having a key input unit are often installed in public places. For example, electronic devices having a key input unit are used in museums and art museums to provide various video information, and electronic devices having a key input unit as karaoke monitors are used in karaoke rooms and the like.

FIG. 4 is a block diagram showing the configuration of a conventional electronic device having a key input unit. In FIG. 4, a key input section 1 has a plurality of keys provided on an electronic device main body or a remote control transmitter. A key input from the key input unit 1 is converted into an electric signal and input to the control unit 2.
The control unit 2 includes a key analysis unit 21 and a process execution unit 22. A key input signal from the key input unit 1 is transmitted to the key analysis unit 21.
Is input to The key analysis unit 21 analyzes which key of the key input unit 1 has been pressed, and inputs the analysis result to the processing execution unit 22. Then, the process execution unit 22 executes a process according to the analysis result.

Here, the operation of the control unit 2 in FIG. 4 will be described with reference to a flowchart shown in FIG. FIG.
In, the control unit 2 usually performs the main processing 10 in S (step) 1. In S2, it is determined whether or not there is a key input. If there is a key input, key processing is performed in S3 and the process returns to S1. If there is no key input in S2, the process returns to S1 without performing any processing. In this conventional electronic device having a key input unit, when a key input is made by the key input unit 1, the process is executed immediately.

[0005]

However, in an electronic device having a key input unit installed in a public place, since an unspecified number of people operate the key input unit 1,
By operating the key input unit 1 unnecessarily, the data that has been adjusted in advance may become out of order or cause a failure. In order to prevent this, it is conceivable to complicate the key operation by the key input unit 1. However, it is not preferable because it becomes complicated for a person who performs the key operation correctly. The present invention has been made in view of such a problem, and has as its object to provide an electronic device having a key input unit that does not cause a problem even if a key input is performed unnecessarily.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a key input section, a key analysis section for analyzing key input by the key input section, and a key analysis section. In an electronic device having a key input unit including a process execution unit that executes a process based on an analysis result, a first counting unit that counts a time during which key input by the key input unit is continuously performed; A second counting means for counting an elapsed time after the processing execution unit has executed the processing based on the key input; and in the initial state, the key input is continuously performed as long as the first counting means counts for a predetermined time. If so, the key input is made valid and a process based on the key input is executed, and the key input continues as long as the first counting means counts the predetermined time. Otherwise, the key input is invalidated so that the process based on the key input is not executed, and after the process based on the key input is executed by the process execution unit, the second counting means If a key input is made before the predetermined elapsed time is counted, the key input is validated and a process based on the key input is immediately executed, and the key input is performed until the second counting means counts the predetermined elapsed time. And an electronic device having a key input unit, which is provided with control means for performing control to return to the initial state if not performed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic device having a key input unit according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of an electronic device having a key input unit of the present invention, and FIGS. 2 and 3 are flowcharts for explaining the operation of the electronic device having a key input unit of the present invention. In FIG. 1, the same parts as those in FIG. 4 are denoted by the same reference numerals.

In FIG. 1, a key input unit 1 has a plurality of keys provided on an electronic device main body or a remote control transmitter. A key input from the key input unit 1 is converted into an electric signal and input to the control unit 2. The control unit 2 includes a key analysis unit 21, a process execution unit 22, and an interrupt processing unit 23, and a key input signal from the key input unit 1 is transmitted to the key analysis unit 21.
Is input to The key analysis unit 21 analyzes which key of the key input unit 1 has been pressed, and inputs the analysis result to the processing execution unit 22. Further, the key analysis unit 21 performs the following processing with the interrupt processing unit 23. Then, the process execution unit 22 executes a process according to the analysis result, that is, a process based on a key input by the key input unit 1.

Here, the schematic operation of the control unit 2 in the electronic device having the key input unit of the present invention will be described. The interrupt processing unit 23 includes a counter C1 for counting how many seconds have elapsed since the key input of the key input unit 1 was performed, and a counter C2 for counting how many seconds have elapsed since the key processing was executed. . That is, the counter C1 counts the continuous key input time by the key input unit 1, and the counter C2 counts the elapsed time after execution of the key processing.

In the initial state, when a key is input by the key input unit 1, the counter C1 counts the time from when the key is pressed. At this time, if the key is released before the predetermined positive time T1 (for example, 2 seconds) has been reached, the key processing is not executed, and when the time T1 is reached, the key processing is executed for the first time. Let it. Next, when the key processing is executed, the counter C2 counts the elapsed time after executing the processing. At this time, if a new key input is made before the time T2 (for example, 10 seconds) which is a predetermined positive value is reached, the key processing is immediately executed. When time T2 is reached, return to the above initial state,
Key processing is not executed unless key input is continued for a new time T1 or more.

Further, the operation of the control section 2 in FIG. 1 will be described with reference to the flowcharts shown in FIGS. The control unit 2 interrupts the main processing by the key analysis unit 21 and the processing execution unit 22 every second, for example, and performs the processing by the interrupt processing unit 23 for executing the auxiliary processing. First, processing by the interrupt processing unit 23 will be described. In FIG. 3, the counters C1 and C2 count up in S31. In S32, it is determined whether or not the value of the counter C2 is greater than the count value corresponding to the time T2 + a (a is a positive arbitrary value).
2 to the counter C2 by substituting the count value of the time T2 + a.
Is not larger than the value of the time T2 + a.

Next, the operation shown in FIG. 2 will be described.
In FIG. 2, when the control unit 2 is activated, the counters C1 and C2 are initialized to 0 and the time T2 +, respectively, in S21.
The count value corresponding to a is substituted, and the main process is performed in S22. In S23, it is determined whether or not there is a key input. If the key has not been pressed, the counter C1 is cleared in S24 and the process returns to S22. Since the cycle in which one process including the main process is completed is about several tens of milliseconds, even if the interrupt processing unit 5 is operated every second and the counter C1 is counted up, key input must be performed. As soon as the counter C1 is cleared,
Normally, the value of the counter C1 is kept at 0. On the other hand, since the initial value of the counter C2 is the count value of the time T2 + a, there is a process for preventing the counter C2 from exceeding the time T2 + a even if the counter C2 is counted up by the interrupt processing unit 23. The state of T2 + a is maintained.

If the key input by the key input unit 1 is performed for the first time, it is determined whether or not the key is pressed in S23. If the key is pressed, the process proceeds to S25. S2
In 5, it is determined whether the counter C1 is equal to or greater than the count value corresponding to the time T1, and if not, the process proceeds to S26. As described above, the counter C1 keeps 0 before the key is pressed, and the value of the counter C1 is smaller than the time T1 immediately after the key is pressed, so that the process proceeds to S26. . In S26, it is determined whether the value of the counter C2 is equal to or less than the time T2. If the value of the counter C2 is equal to or less than T2, S
Move to 27, otherwise return to S22. As described above, before the key is pressed, the value of the counter C2 is equal to the time T.
2 + a, which is larger than the time T2, so that the process returns to the main process of S22 without doing anything. Therefore, immediately after the key is pressed, no key processing is performed.

Furthermore, since there is no process for clearing the counter C1 if the key is kept pressed, the value counted up in the interrupt processing unit 23 remains as it is. Then, since the value of the counter C1 eventually becomes equal to or more than the time T1, it is determined in S25 that the value of the counter C1 has become equal to or more than the time T1.
And the key processing is performed. Therefore, if the key is kept pressed for the time T1 or longer, the key processing is executed.

After the key processing is completed in S27, the process proceeds to S2
At S8, the values of both the counters C1 and C2 are cleared, and at S22
It returns to the main processing of. When the key is released after the key processing is executed, the counter C1 is cleared after the key processing, and when it is determined in S23 that the key is not pressed, the counter C1 is reset.
Since the counter C1 is cleared in the process of 24, the counter C1 keeps 0. On the other hand, since the counter C2 is cleared after the key processing is executed, the interrupt processing unit 2
It is counted up by 3. At this time, immediately after the key processing is executed, the value of the counter C2 is smaller than the time T2 + a, so that the counter C2 continues to be counted up.

Subsequently, when the key is pressed again, S23
Is determined that the key has been pressed, and the routine goes to S25. Before the key is pressed again, the value of the counter C1 is 0. Therefore, immediately after the key is pressed, the value of the counter C1 is smaller than the time T1. Therefore, from S25 to S2
The process moves to 6. After the key processing is executed, the key is pressed again when the value of the counter C2 is smaller than the time T2. Therefore, it is determined in S26 that the value of the counter C2 is smaller than the time T2. Then, the key processing is executed. Therefore, after the key processing is executed, the next key processing is immediately executed during the time T2.

When the key processing is completed in S27, the values of both the counters C1 and C2 are cleared in the same manner as described above.
It returns to the main processing of. If the key is not pressed again after the key processing is executed, the value of the counter C2 eventually becomes equal to or longer than the time T2, and the state returns to the state before the key was pressed for the first time (initial state). . Therefore, after the key processing is executed, the next key processing is immediately executed during the time T2. However, when the time exceeds the time T2, the key processing is performed during the time T1 in the same manner as when the key is pressed for the first time. If the key is not kept pressed, the state returns to a state where the key processing is not executed.

In the electronic device having the key input unit of the present invention as described above, since the processing is not executed immediately even if the key input unit 1 is operated, an unspecified large number of persons who do not know the above-mentioned specifications are provided. Can assume that the key does not work, and can prevent the key input unit 1 from being operated unnecessarily. On the other hand, for those who know the above specifications, just remember that it takes time only for the first key input, and then normal key input operation is possible, so there is no complexity. It becomes possible to operate without memorizing. In addition, after a predetermined time has elapsed, the operation returns to the initial state without performing any operation for reducing the effect of the key, so that the usability is extremely high.

By switching between the function of making the key effect different from that of the present invention and the function of keeping the key effect constant as in the prior art, an electronic device having a key input unit can be used. Can be used properly depending on the situation, which is convenient. In the present embodiment, the effect of the first key input is reduced. However, the effect of the second key input can be reduced, or the time T1, T
2 is not limited to this embodiment, but can be changed as appropriate.

[0020]

As described in detail above, the electronic device having the key input unit of the present invention has the first counting means for counting the time during which the key input by the key input unit is continuously performed, and the processing. A second counting means for counting an elapsed time after the execution unit has executed the processing based on the key input, and if the key input is continuously performed for the predetermined time by the first counting means in the initial state. If the key input is valid, the process based on the key input is executed, and if the key input is not continuously performed for the predetermined time by the first counting means, the key input is invalidated and the process based on the key input is executed. After the process execution unit executes the process based on the key input, the key input is performed before the second counting means counts the predetermined elapsed time. Is performed, the key input is validated, the process based on the key input is immediately executed, and if the key input is not performed before the second counting means counts the predetermined elapsed time, the control is returned to the initial state. Since the configuration is provided with the means, there is a feature that it is possible to effectively prevent inconvenience even if a key input is made unnecessarily.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the present invention.

FIG. 3 is a flowchart for explaining the operation of the present invention.

FIG. 4 is a block diagram showing a conventional example.

FIG. 5 is a flowchart for explaining the operation of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Key input part 2 Control part (control means) 21 Key analysis part 22 Process execution part 23 Interruption processing part C1, C2 Counter (counting means)

Claims (1)

(57) [Claims] A key input unit comprising: a key input unit; a key analysis unit for analyzing a key input by the key input unit; and a processing execution unit for executing a process based on an analysis result by the key analysis unit. In the electronic device, a first counting unit that counts a time during which a key input by the key input unit is continuously performed, and counts an elapsed time after the process execution unit executes a process based on the key input. A second counting means, in the initial state, if a key input is continuously performed for a predetermined time by the first counting means, the key input is made valid and a process based on the key input is executed; If the key input is not continued for the predetermined time by the first counting means, the key input is invalidated and the processing based on the key input is invalidated. After the processing based on the key input is performed by the processing execution unit, if the key input is performed before the second counting means counts a predetermined elapsed time, the key input is performed. Control means for immediately executing a process based on the key input, and if the key input is not performed before the second counting means counts the predetermined elapsed time, the control means returns to the initial state. An electronic device having a key input unit, which is provided and configured.