JP2003256127A - Sheet identification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the power consumption and system load without causing a defectiveness in a sheet identification device. <P>SOLUTION: In an electronic notebook applying this sheet identification device, page detection, coordinate detection and pen-on/pen-off determination are performed at the timing shown in (a). The page detection is performed only once within one cycle C<SB>1</SB>after pen-down shown by an arrow mark. The coordinate detection is performed at every 10 ms after the pen-down. The next page detection is performed after pen-off or after shifting to an idle mode. In this manner, the frequency of page detection is further reduced to suppress the power consumption, and the system load is further reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet type information processing apparatus, a sheet identification apparatus for identifying a plurality of sheets used in flip charts and the like.

[0002]

2. Description of the Related Art With the spread of computers in recent years, various information devices having excellent man-machine interfaces have been proposed. One of them is a so-called electronic notebook 1 as shown in FIG. The electronic notebook 1 has a memo pad 5 (also referred to as a sheet) placed on the magnetic tablet 3, and the electronic notebook 1 is set in the "recording mode".
Then, the voice collected by the built-in microphone 7 is recorded in the memory in the electronic notebook 1. At this time, if a character or figure (typically referred to as “character” hereinafter) is formed on the memo pad 5 by the dedicated electronic pen 9, the coordinates on the memo pad 5 where the character is formed and the sound is collected at that time. The recorded voices are associated with each other and recorded in the memory.

The electronic notebook 1 is operated by appropriately operating the operation keys 11.
Is set to the "playback mode", the desired memo pad 5 is placed on the magnetic tablet 3, and any character written on the memo pad 5 is designated by the dedicated electronic pen 9. The character is recorded in the memory at the time when the character was written. The produced sound is emitted from the speaker 13. Therefore, the electronic notebook 1 is a very useful device in a meeting, a lecture, etc., when listening to a story while taking notes and confirming the contents later. A reference numeral 15 is a liquid crystal display for displaying the number of pages of the memo pad 5 currently placed on the magnetic tablet 3 (a unique number assigned to each memo pad 5, also referred to as a page), the remaining amount of memory, and the like. (Hereinafter referred to as LCD), reference numeral 17 is a removable memory card used for external use of the contents stored in the memory. Other uses of the memory card 17 include the following. That is, the memory card 1
Voices and coordinates are recorded in advance in 7 in correspondence with each other (that is, not recorded in the recording mode of the electronic notebook 1), and a sheet corresponding to the memory card 17 is prepared. The sheet is a magnetic tablet 3
Place the memory card 17 in the electronic notebook 1,
When an arbitrary place on the sheet is designated by the dedicated electronic pen 9, a sound corresponding to the position is emitted from the speaker 13.
This is suitable when the electronic notebook 1 is used for educational purposes.

Further, the dedicated electronic pen 9 forms characters on the memo pad 5 when ink oozes out from the tip thereof. Further, the dedicated electronic pen 9 generates an AC magnetic field from the same tip, and the tip directly contacts the surface of the magnetic tablet 3 or indirectly through the memo pad 5 (hereinafter, simply “contact the magnetic tablet 3” or “exclusively”). (The electronic pen 9 is said to be in contact)), and this magnetic field causes the magnetic tablet 3 to detect the coordinates of the tip of the dedicated electronic pen 9.
The structure of the tip of the dedicated electronic pen 9 is substantially the same as the structure of the pen used in the electronic blackboard disclosed in Japanese Patent Laid-Open No. 2001-51784 filed by the applicant of the present application, and will not be described here. Also, attach the tip of the dedicated electronic pen 9 to the magnetic tablet 3
When touched, the frequency of the alternating magnetic field is changed from that before contact, so that the contact / non-contact of the dedicated electronic pen 9 can be accurately detected even when a plurality of memo pads 5 are placed on the magnetic tablet 3. Has been

Whether the dedicated electronic pen 9 is in contact or not is determined by
This is carried out periodically, and the coordinates of the tip of the dedicated electronic pen 9 are detected only when the dedicated electronic pen 9 is in contact. Further, when there are a plurality of memo pads 5, the detection operation (referred to as page detection) for identifying the memo pads 5 from each other is performed at various timings. This is shown in the time chart of FIG. Although three examples are shown here, the determination cycle of whether the dedicated electronic pen 9 is in contact is 10 ms in all cases.

First, in FIGS. 8A and 8B, when the dedicated electronic pen 9 is in contact (referred to as pen-on), coordinate detection is performed in 10 ms (FIG. 8A). When 9 is distant (called pen-off), page detection is performed in 10 ms (FIG. 8 (b)). That is, in this mode, either the coordinate detection or the page detection is performed in synchronization with the cycle for determining whether the pen is off or the pen is on, and depending on the result of the determination, that is, whether the pen is off or the pen is on. It is a feature that the memo pad 5 is not changed during pen-on and page detection is not performed.

Next, in FIG. 8C, normally, only page detection is performed in synchronization with the cycle for determining pen-off or pen-on, and the same from the next cycle when the change from pen-off to pen-on is detected. This is a mode in which coordinate detection is performed in a cycle. In the figure, the upward arrow indicates the timing when the dedicated electronic pen 9 contacts the memo pad 5. That is, the pen-off state is on the left side of the arrow, and the pen-on state is on the right side of the arrow.

FIG. 8 (d) is similar to the mode of FIG. 8 (c), except that the page detection cycle is twice as long as the cycle for determining pen-off or pen-on. As a page detection method, a resonance circuit having a resonance frequency unique to each memo pad 5 is formed and detected by the magnetic tablet 3, or a black and white code (eg, bar code) unique to each memo pad 5 is used. A method of forming it and reading it with an optical sensor such as a bar code reader can be considered. The former is described in detail in JP-A-9-325849 and the like, and the latter is also described in JP-A-9-325849.
Since it is described in detail in Japanese Unexamined Patent Publication No. 330170, the description is omitted here.

[0009]

However, according to the above-mentioned prior art, there is a drawback that the power consumption is large because the number of page detections is large. Also, page detection becomes a load factor of the system. However, if the number of page detections is excessively reduced, there is a possibility that problems such as the number of pages displayed on the LCD 15 and the actual number of pages do not match.

The present invention has been made in view of the above problems, and an object thereof is to reduce power consumption and system load without causing such a problem.

[0011]

Means for Solving the Problems and Effects of the Invention A sheet identification device according to claim 1 of the present invention made to solve the above problems is a plurality of predetermined sheets and the surface of each sheet. Position specifying means for specifying the position of the contact on the sheet by contacting the sheet, and contact detecting means for detecting whether or not the position specifying means is in contact with the sheet at a predetermined cycle. Position detecting means for detecting a position on the sheet designated by the position designating means, and sheet detecting means for detecting which of the plurality of sheets the position is designated by the position designating means In the sheet identification apparatus including, after the sheet detection unit changes the detection result by the contact detection unit from “not in contact” to “in contact” The sheet detection means performs the detection within a fixed time, and thereafter, the sheet detection means does not perform the detection until the detection result of the contact detection means changes to “not in contact”. Characterize.

That is, in this sheet identification device, the detection result of the contact detection means is the position designation means (the electronic notebook 1).
Then, the sheet detecting means determines whether the sheet is a plurality of sheets within a certain period of time after the change from "not in contact" to "contact" with the dedicated electronic pen 9). Is detected (corresponding to page detection; hereinafter also referred to as page detection). Then, the sheet detection unit does not detect which of the plurality of sheets the sheet detection unit detects until the detection result by the contact detection unit changes to “not in contact”.

Therefore, according to the sheet identifying apparatus of the first aspect, since the number of times of identifying the sheet is reduced, it is possible to reduce power consumption and system load. In addition,
The number of times the sheet identification is performed to identify the sheet may not be only once after the position designation unit changes from “not in contact” to “contact” with the sheet. Generally, the detection cycle of whether or not the position designating means is in contact with the sheet (corresponding to pen-on / pen-off determination) by the contact detecting means is several meters.
The time required for the user to change the sheet is several hundred ms even if it is as short as s to several tens of ms, so the sheet is changed several times after changing from "not in contact" to "in contact". Even if the page is identified, the number of page detections can be far reduced compared to the conventional case where pages are detected in synchronization with the detection cycle of the contact detection means.

The sheet identification apparatus according to the second aspect of the invention is
A plurality of predetermined sheets and a position designating unit for designating the position of the contact on the sheet by contacting the surface of each sheet, and whether or not the position designating unit is in contact with the sheet. Contact detecting means for detecting whether or not the position on the sheet specified by the position specifying means, and the sheet whose position is specified by the position specifying means In a sheet identification device including a sheet detection unit that detects which one of a plurality of sheets, the position designation unit determines whether or not the position designation unit has approached the sheet to a predetermined distance at a predetermined cycle. Proximity detecting means for detecting is provided, and when the sheet detecting means detects that the position designating means has approached by the approach detecting means, a predetermined time after the detection. Further, the sheet detection means performs the detection, and thereafter, the sheet detection means does not perform the detection until the detection result of the contact detection means changes to “not in contact”. .

In this sheet identification device, when the position designation means approaches the sheet, the sheet detection means performs page detection. Therefore, according to the sheet identification apparatus of the second aspect, it is possible to reduce power consumption and system load. The number of times the sheet detecting unit detects a page may be a plurality of times, as in the sheet identifying apparatus according to the first aspect.

According to another aspect of the sheet identifying apparatus of the present invention, a plurality of predetermined sheets and position specifying means for specifying the contact position on the sheets by contacting the surfaces of the respective sheets. A contact detecting means for detecting whether or not the position designating means is in contact with the sheet in a predetermined cycle; and a position detecting means for detecting a position on the sheet designated by the position designating means,
In a sheet identification device including a sheet detection unit that detects which one of the plurality of sheets the sheet whose position is designated by the position designation unit, the sheet detection unit detects by the contact detection unit. When the result is "contacting", the detection by the sheet detecting means is not performed, and thereafter, when the detection result by the contact detecting means changes to "not in contact", the sheet detecting means detects It is characterized by performing detection.

In this sheet identifying apparatus, when the position designating means moves away from the state of contacting the sheet, the sheet detecting means performs page detection. Therefore, according to the sheet identifying apparatus of the third aspect, it is possible to reduce power consumption and system load. The number of times the sheet detecting unit detects a page may be plural, as in the sheet identifying apparatus according to the first and second aspects.

According to a fourth aspect of the present invention, in the sheet identifying apparatus according to the third aspect, the sheet detecting means is
When the detection by the sheet detection unit is performed by changing the detection result by the contact detection unit from “in contact” to “not in contact”, thereafter, the detection by the sheet detection unit is periodically performed. It is characterized by performing.

According to claim 4 configured as described above,
Even if the sheet is changed after the position designating means is separated from the sheet, this can be detected. The sheet identification device according to claim 5, and a plurality of predetermined sheets, and a position designating unit for designating the position of the contact on the sheet by contacting the surface of each sheet,
Position detecting means for detecting a position on the sheet designated by the position designating means, and sheet identification information indicating which of the plurality of sheets the sheet whose position is designated by the position designating means is detected. Sheet identification means, voice input means for inputting voice, voice input by the voice input means, the sheet identification information detected by the sheet identification means, and the position detection means detected by the position detection means. Recording means for recording the position on the sheet, voice output means for outputting the voice recorded in the recording means, voice input by the voice input means, and the voice when the voice is input The position on the sheet detected by the position detection means, and the sheet detected by the sheet identification means when the voice is input When different information is recorded in the storage means in association with each other, a recording mode, and when a position on the sheet is specified by the position specifying means, the position and the position correspond to the specified sheet. And a mode control unit that switches the sheet identification device to at least two modes of a reproduction mode in which the sound output unit outputs the sound recorded in the recording unit, and the sheet identification unit includes: In the reproduction mode, the sheet identification information is detected in a predetermined first cycle, and in the recording mode, the sheet identification information is detected in a second cycle shorter than the first cycle. Is characterized in that.

That is, in this sheet identification device, the detection cycle of the sheet identification means in the reproduction mode is longer than the detection cycle of the sheet identification means in the recording mode. The recording mode is detected by the voice input by the voice input means, the position on the sheet detected by the position detection means when the voice is input, and the sheet identification means when the voice is input. This is a mode in which the sheet identification information is recorded in the recording means in the storage means in association with each other. In other words, since the reference recording such as the reproduction mode to be performed thereafter is performed, these accurately correspond to each other. In order to perform recording, it is preferable that the detection cycle of the sheet identification means is short.

On the other hand, since the reproduction mode is a mode in which the voice output means outputs the voice recorded in the recording means corresponding to the sheet, even if the voice not corresponding to the sheet is generated, it can be dealt with in the recording mode. It is not a serious problem as compared with the disappearance, and it is often sufficient that the correct page is detected in the next page detection cycle and the correct voice is corrected.

Therefore, according to the sheet identifying apparatus of the fifth aspect, since the number of page detections in the reproduction mode is reduced, it is possible to reduce power consumption and system load. In the sheet identification device according to claim 6,
6. The sheet identification device according to claim 5, wherein the mode control means is capable of switching the sheet identification device to an idle mode in which neither the voice input nor the voice output is performed. In the idle mode, the means detects the sheet identification information in a third cycle longer than the first cycle.

That is, in this sheet identification device, there is an idle mode in addition to the recording mode and the reproduction mode. In this idle mode, the detection cycle of the sheet identification means is shorter than the detection cycle of the sheet identification means in the reproduction mode. It has been made longer. Therefore, according to the sheet identification apparatus of the sixth aspect, the number of page detections in the idle mode is reduced, so that the power consumption and the system load can be further reduced.

The position designating means is not limited to designating the position, and may be a pen for forming characters or figures on the sheet as described in claim 7.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Configuration Common to Each Embodiment] An electronic notebook will be described below as an embodiment of the present invention. The external appearance of this electronic notebook is the same as that shown in FIG. The recording mode and the reproduction mode are also provided similarly to the electronic notebook 1 described above. Further, the reference numerals are the same as those in FIG.

First, FIG. 2 is a block diagram showing the outline of the internal structure of the electronic notebook 1 to which the present invention is applied. That is, the electronic notebook 1 collects sound with the built-in microphone 7 described above and amplifies an audio signal converted into an electric signal.
3, a codec 35 that encodes the amplified voice signal and decodes the encoded voice signal, a memory 37 that stores various data including the encoded voice signal, and a process described later. CPU 38 for executing various processes, an amplifier circuit 39 for amplifying the audio signal decoded by the codec 35, the speaker 13 for outputting the amplified audio signal, a grid 41 having a sense coil for detecting coordinates, and Selector 43, grid 4
1. An amplification circuit 45 that amplifies the induction signal detected at 1, a detection circuit 47 that extracts a signal effective for coordinate detection from the induction signal, an A / D converter 49 that converts the detected signal into a digital signal. The operation key 11 and the LCD 15 described above are main components. The grid 41 and the selector 43 form the magnetic tablet 3. Regarding the method of detecting coordinates by these and detecting whether or not the pen is on, the above-mentioned Japanese Patent Laid-Open No. 2001-2001
Since it is described in detail in Japanese Patent Publication No. 51784, it is omitted here. However, it is also possible to detect the coordinates and whether or not the pen is on by a method other than that described in Japanese Patent Laid-Open No. 2001-51784.

[First Embodiment] The outline of the processing executed by the CPU 38 to detect a page will be described with reference to the flowchart of FIG. This is a basic process in the electronic notebook 1, and a timer interrupt is activated in 10 ms. When this process is started, the first step (hereinafter,
In S) 110, it is determined whether the electronic notebook 1 is in the idle mode. The idle mode refers to a standby state in which the electronic notebook 1 is not in the recording mode or the reproduction mode. In this case, the process proceeds to S120 and waits for 2 seconds to elapse (actually, this process is once terminated, this process is activated again by an interrupt, and this “wait” is realized by repeating the same determination. The same "waiting" is performed in the processing of the second and third embodiments described below and described later, but it is simply expressed as "waiting" there). When 2 seconds have elapsed, the process proceeds to S130, page detection is performed, and this processing ends.

If it is determined in S110 that the answer is N, that is, the idle mode is not set, the process proceeds to S140, in which the electronic notebook 1
Is in the playback mode. If the determination is negative, the electronic note 1 is considered to be in the recording mode, the process proceeds to S150, and it is determined whether or not the pen is down. Here, pen down refers to a transition from pen off to pen on. When the pen is down (S150:
In Y), the process proceeds to S160, page detection is performed, and this processing ends. This indicates that page detection is performed immediately after pen down. In the recording mode, when writing for one stroke is performed using the dedicated electronic pen 9, the pen-on state continues, so pen down is not performed and the process does not proceed to S160.

When the pen is not down (S150:
In N), the process proceeds to S170, and it is determined whether the pen is off. If this determination is negative, that is, if it is determined that the pen is on, this processing ends. If the pen is off, S180
Wait 0.2 seconds, detect the page in S190,
This process ends.

On the other hand, if Y in S140, that is, if the electronic notebook 1 is in the reproduction mode, the process proceeds to S200 and it is determined whether or not the pen is down. If pen down, S
In step 210, page detection is performed and this processing ends. If the pen is not down (S200: N),
In step S220, it is determined whether the pen is off. If the pen is on, this process ends, and if the pen is off, S230.
Wait 0.5 seconds, and after detecting the page in S240,
This process ends.

Although not shown in FIG. 3, in the pen-on state, the same cycle as the starting cycle of this process (that is, 10 m).
Coordinate detection is performed in s). This process will be called the second process. By executing the above processing, the electronic notebook 1 performs page detection and the like at the timings shown in FIGS. 4 and 5A. First, FIG. 4 shows a page detection interval in each mode in the pen-off state. As shown in the figure, the page detection interval is the longest in the idle mode (specifically, 2 seconds: S12
0), next is the playback mode (0.5 seconds: S230),
The shortest is the recording mode (0.2 seconds: S180).

By doing so, the number of page detections is reduced, so that power consumption can be suppressed and the system load can be reduced. Moreover, even if the number of page detections is reduced in this way, it is reduced during pen-off, so that even if the memo pad 5 changes, no major trouble occurs. That is, in the recording mode, since page detection is performed in a short period of 0.2 seconds, an erroneous correspondence between the voice (or the coordinate, in addition to this, hereinafter represented by voice) and the memo pad 5 is stored in the memory 37. It can be prevented from being made. Although this cycle of 0.2 seconds is short, it is much longer than 10 ms which is the pen-on / pen-off determination cycle, and it is difficult time to change the memo pad 5 placed on the magnetic tablet 3 during this period. Has become.

On the other hand, in the playback mode, the page detection cycle is long, which is 0.5 seconds, so it is possible to change the memo pad 5 placed on the magnetic tablet 3 during this time, but the voice and memo pad already completed. Since this is a mode for listening to the voice based on the correspondence relationship of 5, it does not cause a big trouble. That is, even if the sound that should not be generated corresponding to the memo pad 5 is generated by the speaker 1
Even if it is generated from 3, the correct voice is generated 0.5 seconds later, and this problem is resolved.

Further, in the idle mode, page detection is performed at a longer cycle of 2 seconds, so that power consumption and load on the system are further reduced. This mode does not record or play, so even if the memo pad 5 placed on the magnetic tablet 3 is changed, the LCD 15
The only problem is that the correct number of pages may not be displayed in. Even with this problem, if the change of the memo pad 5 is stopped, the correct number of pages will be LC after 2 seconds.
Displayed on D15 and resolved.

FIG. 5A shows timings of page detection and coordinate detection performed before and after pen down shown by an arrow in the reproduction mode or the recording mode. However, in this embodiment, only pen-on / pen-off detection is performed before pen down, and page detection and coordinate detection are performed after pen down. As shown in the figure, the coordinate detection is performed every 10 ms after pen down by the second process. And page detection is only performed once within one cycle C1 after pen down. Next time, page detection is performed after the pen is turned off (S190 or S210) or after the mode is changed to the idle mode (S130).

By doing so, the number of page detections is further reduced, so that the power consumption is further suppressed,
The system load is also smaller. [Second Embodiment] CPU 38 for page detection
An outline of another processing executed by the above will be described with reference to the flowchart of FIG. This is a basic process in the electronic notebook 1 similar to the process shown in FIG. 3, and the timer interrupt is activated in 10 ms. When this process is activated, first in S310, it is determined whether or not the electronic notebook 1 is in the idle mode. In the idle mode, the process proceeds to S320 and waits for 2 seconds. When 2 seconds have passed, the process proceeds to S330, page detection is performed, and this processing ends.

When it is determined in S310 that the answer is N, that is, the idle mode is not set, the process proceeds to S340 and the electronic notebook 1
Is in the playback mode. If the determination is negative, the electronic notebook 1 is considered to be in the recording mode, the process proceeds to S350, and it is determined whether the dedicated electronic pen 9 is approaching the magnetic tablet 3. The fact that the dedicated electronic pen 9 is approaching can be known by the magnetic tablet 3 detecting the AC magnetic field of the dedicated electronic pen 9. When the dedicated electronic pen 9 is approaching (S350: Y), S360
In step S370, page detection is performed, pen down is detected in S370, and this processing ends. This indicates that page detection is performed immediately before pen down. Although the dedicated electronic pen 9 may have approached, but may go away from the magnetic tablet 3 without turning on the pen, no problem occurs.

When the dedicated electronic pen 9 is not approaching (S
In 350: N), the process proceeds to S380, and it is determined whether or not the pen is off. If it is determined that the pen is on, this process ends. If the pen is off, wait 0.2 seconds at S390,
After the page is detected in S400, this processing is ended.

On the other hand, when the electronic notebook 1 is in the reproduction mode (S340: Y), the process proceeds to S410, and it is determined whether the dedicated electronic pen 9 is approaching the magnetic tablet 3. If the dedicated electronic pen 9 is approaching, the process proceeds to S420, page detection is performed, pen down is detected in S430, and this process ends. When the dedicated electronic pen 9 is not approaching (S410: N), the process proceeds to S440, and it is determined whether or not the pen is off. If the pen is on, this process is terminated. If the pen is off, wait for 0.5 seconds at S450, then
After the page is detected at 460, this processing is ended.

As in the first embodiment, in the pen-on state, coordinate detection is performed at the same cycle (that is, 10 ms) as the starting cycle of this processing. Following the first embodiment, this process will be referred to as the second process. By executing the above processing, the electronic notebook 1 performs page detection and the like at the timing shown in FIG. 4 in the pen-off state as in the first embodiment. Therefore, the description for when the pen is off is omitted. And in the pen-on state, FIG.
The page detection or the like is performed at the timing shown in (b). This figure shows timings of page detection and coordinate detection before and after approaching the magnetic tablet 3 by the dedicated electronic pen 9 indicated by an arrow (pen approaching, shown below; imitating this) in the playback mode or recording mode. Is shown.
However, in the present embodiment, only pen-on / pen-off detection is performed before the pen approaches, and page detection and coordinate detection are performed after the pen approach. As shown in this figure, the coordinate detection is performed by the second process, and after pen down, 10
It is performed every ms. And page detection is performed only once after the pen approaches. Next time, page detection will be performed after pen-off (S400 or S4
60) or after shifting to the idle mode (S33
0).

By doing so, the number of page detections is further reduced, so that power consumption is further suppressed,
The system load is also smaller. Further, since the coordinate detection is not performed in the next cycle C2 after the detection of the approach of the pen, the load on the system can be further reduced.

[Third Embodiment] An outline of another processing executed by the CPU 38 to detect a page will be described with reference to the flowchart of FIG. This is shown in FIGS.
Similar to the process shown in (1), it is a basic process in the electronic notebook 1 and is started by a timer interrupt in 10 ms. When this process is activated, first in S510, it is determined whether or not the electronic notebook 1 is in the idle mode. If it is the idle mode, proceed to S520 and wait for 2 seconds. After 2 seconds, S
The process proceeds to 530, page detection is performed, and this processing ends.

When it is determined in S510 that the answer is N, that is, the idle mode is not set, the process proceeds to S540 and the electronic notebook 1
Is in the playback mode. If the determination is negative, the electronic note 1 is considered to be in the recording mode, the process proceeds to S550, and it is determined whether or not the pen-on state. If the pen is on (S550: Y), this process ends.

If the pen is not on (S550: N), the flow advances to S560 to determine whether or not the pen is up. Pen-up refers to a transition from pen-on to pen-off. This means that if the result of the pen-on / pen-off determination immediately before (10 ms before) is pen-on, pen-up has occurred. If it is determined that pen-up has been performed, page detection is performed in S570, and this processing ends. If the pen is not up (S560: N), the process waits 0.2 seconds in S580, detects the page in S590, and then ends this processing.

On the other hand, when the electronic note 1 is in the reproduction mode (S540: Y), the process proceeds to S600, and it is determined whether the pen is on. If the pen is on, this process ends.
If the pen is not on (S600: N), S610
Then, it is determined whether or not the pen is up. If it is determined that the pen is up, page detection is performed in S620, and this processing ends. If the pen is not up (S61
0: N), 0.2 seconds is waited in S630, the page is detected in S640, and then this processing is ended.

As in the first and second embodiments, in the pen-on state, coordinate detection is performed at the same cycle (that is, 10 ms) as the starting cycle of this processing. Following the first and second embodiments, this process will be referred to as the second process. By executing the above-described processing, the electronic notebook 1 performs page detection and the like at the timing shown in FIG. 4 in the pen-off state as in the first and second embodiments. Therefore, the description for when the pen is off is omitted. Then, in the pen-on state, FIG.
The page detection or the like is performed at the timing shown in. This figure shows the timing of page detection and coordinate detection performed before and after pen-up indicated by the arrow in the reproduction mode or the recording mode. As shown in the figure, the coordinate detection is performed every 10 ms after pen down by the second process. The page detection is performed once in one cycle C3 after pen-up, and is not performed during pen-on. Next time, page detection will be performed after 0.2 seconds in the recording mode (S590), 0.5 seconds in the playback mode (S640), and after shifting to the idle mode (S53).
0).

By doing so, the number of page detections is further reduced, so that power consumption is further suppressed,
The system load is also smaller. Further, since the coordinate detection is not performed in the next cycle C3 after detecting the pen-up, the load on the system can be further reduced.

[Other Embodiments] The three embodiments to which the present invention is applied have been described above, but the present invention is not limited to these embodiments and can be implemented in various modes. For example, in any of the above-described embodiments, page detection during pen-on (however, immediately after pen-up only in the third embodiment) and page detection during pen-off are performed within one process, but either one is not performed. You may do it. Even in this case, since the frequency of page detection is reduced, power consumption and system load can be reduced.

Further, in any of the above embodiments, the page detection at the time of pen-on is performed only once as shown in FIG. 5, but it may be performed 2-3 times. For example, in the case of the first embodiment, one cycle next to the cycle C1 immediately after the pen-down is detected may be performed, or one cycle may be further performed. In the first embodiment, coordinate detection is also performed in the page detection cycle, and the system load is slightly heavier than in the second and third embodiments. Therefore, the coordinate detection may not be performed in the page detection cycle.
By doing so, it is possible to realize a low system load equivalent to that of the second and third embodiments.

In the recording mode, pen-up and pen-down are frequently repeated, so the number of page detections in the recording mode can be further reduced (common to any of the above embodiments). For example, in the first embodiment, the page detection is performed every time the pen is down, but the page detection is not performed when only a short time (for example, 0.2 to 0.4 seconds) has passed since the last pen up. You may In the second embodiment and the third embodiment, page detection can be further reduced by making the same for pen approach and pen up.

Although various numerical values have been concretely shown and described for the page detection cycle and the pen-on / pen-off determination cycle, these numerical values may be changed appropriately within the range that does not impair the effects of the present invention. Of course it doesn't matter. In particular,
The page detection in the idle mode may not be performed at all.

The dedicated electronic pen 9 may generate an AC magnetic field having a constant frequency regardless of whether or not it is in contact with it. Further, in the reproduction mode, the character or figure cannot be written on the memo pad 5, but the coordinate pointed out is generated by generating an AC magnetic field.
It may be only detected by the.

Here, the correspondence between the configuration of the embodiment and the essential requirements of the present invention will be shown. The memo pad 5 corresponds to the sheet of the present invention, the memory 37 and the memory card 17 correspond to the recording means of the present invention, the built-in microphone 7 corresponds to the audio input means of the present invention, and the speaker 13 is the audio output means of the present invention. The dedicated electronic pen 9 corresponds to the position specifying means of the present invention, the operation key 11 corresponds to the mode control means of the present invention, and the magnetic tablet 3 serves as the contact detecting means and the position detecting means of the present invention. Corresponding to S160, S21
0, S360, S420, S570, and S620 correspond to the processing as the sheet detecting means of the invention, and S190 and S190.
240, S130, S400, S460, S330, S
590, S640, and S530 correspond to the processing as the sheet identification unit of the present invention.

[Brief description of drawings]

FIG. 1 is an external view of an electronic notebook 1 to which the present invention is applied.

FIG. 2 is a block diagram showing a schematic configuration of an electronic notebook 1.

FIG. 3 is a flowchart of a process for detecting a page in the first embodiment.

FIG. 4 is a time chart showing the timing of page detection in each mode of the electronic notebook 1.

FIG. 5 is a time chart showing the timing of page detection when the electronic notebook 1 is on.

FIG. 6 is a flowchart of a process for detecting a page in the second embodiment.

FIG. 7 is a flowchart of a process for detecting a page in the third embodiment.

FIG. 8 is a time chart showing the timing of page detection and coordinate detection in a conventional electronic notebook.

[Explanation of symbols]

1 ... Electronic notebook 3 ... Magnetic tablet 5 ... Memo pad 7 ... Built-in microphone 9 ... Dedicated electronic pen 11 ... Operation keys 13 ... speaker 15 ... LCD 17 ... Memory card 33 ... Amplifier circuit 35 ... Codec 37 ... Memory 39 ... Amplifying circuit 41 ... Grid 43 ... Selector 45 ... Amplifier circuit 47 ... Detection circuit 49 ... A / D converter

Claims (7)

[Claims] 1. A plurality of predetermined sheets, a position designating unit for designating a position of the contact on the sheet by contacting a surface of each of the sheets, and the position designating unit is arranged on the sheet. Contact detection means for detecting whether or not they are in contact with each other in a predetermined cycle, position detection means for detecting the position on the sheet designated by the position designation means, and position designated by the position designation means. A sheet detecting device for detecting whether the sheet is one of the plurality of sheets; and, in the sheet identifying device, the detection result of the contact detecting device is “not in contact”.
Within a certain time after the change from "contact" to "contact", the sheet detection means performs the detection, and thereafter, the sheet detection is performed until the detection result by the contact detection means changes to "non-contact". A sheet identification device, wherein the detection is not performed by a means. 2. A plurality of predetermined sheets, position specifying means for specifying the position of the contact on the sheets by contacting the surface of each of the sheets, and the position specifying means for the sheets. Contact detection means for detecting whether or not they are in contact with each other in a predetermined cycle, position detection means for detecting the position on the sheet designated by the position designation means, and position designated by the position designation means. A sheet detecting device for detecting whether the sheet is one of the plurality of sheets, and whether the position designating means has approached the sheet to a predetermined distance in advance. The sheet detecting means includes an approach detecting means for detecting at a predetermined cycle, and when the sheet detecting means detects that the position designating means approaches, The sheet detection means performs the detection within a fixed time after the sheet is output, and thereafter, the sheet detection means does not perform the detection until the detection result by the contact detection means changes to "not in contact". The sheet identification device according to claim 1. 3. A plurality of predetermined sheets, position specifying means for specifying the position of the contact on the sheets by contacting the surface of each of the sheets, and the position specifying means for the sheets. Contact detection means for detecting whether or not they are in contact with each other in a predetermined cycle, position detection means for detecting the position on the sheet designated by the position designation means, and position designated by the position designation means. In the sheet identification device including a sheet detecting unit that detects which of the plurality of sheets the sheet is, the sheet detecting unit detects that the detection result of the contact detecting unit is “contacted”. In some cases, the sheet detection means does not perform the detection, and thereafter, when the detection result of the contact detection means changes to “not in contact”, the sheet is detected. Sheet identification apparatus which is characterized in that performs the detection by preparative detecting means. 4. The sheet identification apparatus according to claim 3, wherein the sheet detection unit changes the detection result of the contact detection unit from “contact” to “not contact”, A sheet discriminating apparatus characterized in that, when the sheet detecting means performs the detection, thereafter, the sheet detecting means periodically performs the detection. 5. A plurality of predetermined sheets, a position designating unit for designating a position of the contact on the sheets by contacting the surface of each of the sheets, and a position designating unit designated by the position designating unit. Position detection means for detecting a position on the sheet; sheet identification means for detecting sheet identification information indicating which of the plurality of sheets the sheet whose position is designated by the position designating means; Voice input means for inputting, for recording the voice input by the voice input means, the sheet identification information detected by the sheet identification means, and the position on the sheet detected by the position detection means Recording means, voice output means for outputting the voice recorded in the recording means, voice input by the voice input means, The position on the sheet detected by the position detection unit when a voice is input, and the sheet identification information detected by the sheet identification unit when the voice is input are associated with each other. When a recording mode for recording in the storage means and a position on the sheet are designated by the position designating means, the position and the position are recorded in the recording means in correspondence with the designated sheet. A sheet identification device comprising: a mode control unit that switches the sheet identification device to at least two modes of a reproduction mode in which a sound is output by the audio output unit, wherein the sheet identification unit is predetermined in the reproduction mode. The sheet identification information is detected in the first cycle, and in the recording mode, a second cycle shorter than the first cycle is detected. Sheet identification device, characterized in that in order to detect the sheet identifying information in a cycle. 6. The sheet identification apparatus according to claim 5, wherein the mode control unit can switch the sheet identification apparatus to an idle mode in which neither the voice input nor the voice output is performed. The sheet identification device is configured to detect the sheet identification information in a third cycle that is longer than the first cycle in the idle mode. 7. The sheet identifying apparatus according to claim 1, wherein the position designating unit is a pen that forms characters and figures on the sheet.