JPH11281401A - Wave reshaping circuit, rotating detecting device and rotation detecting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reshape a wave with high accuracy by holding positive/negative peak signal levels of an input signal in a prescribed first/second timing as a first/second peak hold signals, comparing a reference level signal generated on the basis of the respective peak hold signals with the input signal, and reshaping a wave of the input signal. SOLUTION: The same circuit as a wave reshaping circuit 50 is separately arranged. In the wave reshaping circuit 50, peak hold circuits 60, 61 hold positive/negative peak levels of a detecting signal A as peak hold signals SP1 , SP2 . A voltage dividing circuit 62 generates and outputs a reference level signal SREF1 by dividing differential voltage of the hold signals SP1 , SP2 . A comparator 65 reshapes a wave of the detecting signal A on the basis of the reference level signal SREF1 to output a wave reshaping signal SA to an up/down judging circuit 51. The judging circuit 51 outputs up/down judging signals Aup, ADN of 'H' level to a detecting timing generating circuit 56 at rising/trailing time of the wave reshaping signal SA on the basis of the wave reshaping signal S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform shaping circuit, a rotation detecting device, and a rotation detecting method. The present invention relates to a waveform shaping circuit capable of detecting a rotation angle, a rotation detection device, and a rotation detection method.

[0002]

2. Description of the Related Art Conventionally, a device using a rotating bezel BZ as shown in FIG. 21 has been known as a mode switching device or a time correction device for a small device such as a wristwatch. In these devices, a mechanical switch is switched by the operation of a rotating bezel BZ. For example, there is a device in which a pin is made to penetrate a body of a wristwatch and a mode is switched by pressing a circuit spring with the pin. In this device,
The pin is engaged with the back surface of the rotating bezel BZ, and the user switches the plurality of circuits by rotating the rotating bezel BZ to move the position of the pin. In a desktop tape printer and the like, a rotary character input device using a rotary switch is used.

[0003]

However, this is an input device configured to switch the mechanical switch such as a pin or the like by rotating the rotating bezel as described above, and to switch a large number of tens of circuits such as character input. However, there is a problem in that the structure becomes complicated, and the device becomes large-scale, and it is difficult to mount the device on a small portable information device such as a wristwatch. Further, none of the above-mentioned rotary character input devices has been reduced in size and thickness, and has not been mounted on a small information processing device such as a wristwatch. Furthermore, assuming that a rotary character input device that performs other types of character input is mounted on a small portable information device such as a wristwatch, the device configuration is simple, and the rotational position can be accurately determined without being affected by aging. A device capable of detecting and accurately inputting characters is desired.

Further, assuming that rotation detection is performed by an optical encoder, it is necessary to provide a waveform shaping circuit for shaping the waveform of an output signal of an optical sensor (light emitting diode + photodiode). ,
If the configuration can be made so as not to be affected by the individual difference and the aging of the output level of the optical sensor, the output level adjustment process at the time of shipment can be omitted, the manufacturing cost can be reduced, and the maintenance-free rotational position detecting device can be configured. Can be. Therefore, an object of the present invention is to provide a waveform shaping circuit and a waveform shaping method capable of performing more accurate waveform shaping without being affected by individual differences and changes over time of an optical sensor, and a rotation direction and a more accurate waveform shaping method. An object of the present invention is to provide a detection device and a rotation detection method capable of detecting a rotation angle.

[0005]

According to a first aspect of the present invention, there is provided a first peak hold circuit for holding a positive peak signal level of an input signal at a predetermined first timing as a first peak hold signal. Means, a second peak hold means for holding a negative peak signal level of the input signal at a predetermined second timing as a second peak hold signal, and based on the first peak hold signal and the second peak hold signal, Reference level signal generating means for generating and outputting a reference level signal; and waveform shaping means for performing waveform shaping on the input signal by comparing the input signal with the reference level signal and outputting the waveform as a waveform shaping signal. It is characterized by that.

According to a second aspect of the present invention, there is provided a first peak detector for holding a positive peak signal level of an input signal at a predetermined first timing as a first peak hold signal.
A second peak detector that holds a negative peak signal level of the input signal at a predetermined second timing as a second peak hold signal; and a reference level signal based on the first peak hold signal and the second peak hold signal. A reference level signal generation circuit for generating and outputting; and a comparator for performing waveform shaping of the input signal by comparing the input signal with the reference level signal and outputting the waveform as a waveform shaped signal. .

According to a third aspect of the present invention, there is provided a reflecting member on which a predetermined optical pattern having an absorbing region and a reflecting region is formed, and the reflecting member is irradiated with first detection light and reflected by the reflecting member. A first detection unit that receives the first detection light and outputs a first detection signal corresponding to the optical pattern; and a first detection unit disposed at a predetermined angle away from the first detection unit with respect to a rotation center; A second detection unit that irradiates the member with the second detection light, receives the reflected second detection light, and outputs a second detection signal corresponding to the optical pattern;
First peak determination and holding means for determining and holding the peak signal level of the first detection signal at a signal level transition timing of the waveform shaping signal; and a peak of the second detection signal at a signal level transition timing of the first waveform shaping signal. Second peak determination and holding means for determining and holding a signal level; and a first for shaping the waveform of the first detection signal based on the peak signal level of the first detection signal and outputting the shaped signal as the first waveform shaping signal. Waveform shaping means, and second waveform shaping means for shaping the waveform of the second detection signal based on the peak signal level of the second detection signal and outputting as the second waveform shaping signal. And

According to a fourth aspect of the present invention, in the configuration of the third aspect, the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data. The first waveform shaping signal is sampled at a signal level transition timing of the second waveform shaping signal to obtain second sampling data, and the second sampling data of the reflection member is obtained based on the first sampling data and the second sampling data. Signal processing means for calculating a rotation direction and a rotation angle relative to the first detection means and the second detection means.

According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the signal processing means is configured such that a rotational direction of the reflection member relative to the first detection means and the second detection means is a forward rotation direction. A forward / reverse rotation discriminating means for discriminating between the forward and reverse rotation directions and outputting a forward / reverse rotation discrimination signal;
The peak determination holding means determines whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the signal level transition timing of the second waveform shaping signal and the forward / reverse determination signal. First positive / negative timing determining means for determining whether or not the first positive / negative timing is determined, and outputting the first positive / negative timing determining signal;
When the negative timing determination signal corresponds to the positive peak hold timing, the signal level of the first detection signal is changed to the first level at the signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing determination signal. First peak hold means for holding the signal as a peak hold signal, and when the first positive / negative timing determination signal corresponds to a negative peak hold timing, the second waveform shaping corresponding to the first positive / negative timing determination signal The signal level of the first detection signal is changed to the second signal level at the signal level transition timing of the signal.
A second peak hold means for holding the signal as a peak hold signal, wherein the second peak determination holding circuit is configured to perform the second peak hold based on the signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. It is determined whether the signal level transition timing of the first waveform shaping signal is a positive peak hold timing or a negative peak hold timing, and the second positive /
A second positive / negative timing discriminating means for outputting a negative timing discriminating signal; and the second positive / negative timing discriminating signal corresponding to the second positive / negative timing discriminating signal when the second positive / negative timing discriminating signal corresponds to the positive peak hold timing. Holding the signal level of the second detection signal as a third peak hold signal at the signal level transition timing of the first waveform shaping signal;
A peak hold means, wherein when the second positive / negative timing discrimination signal corresponds to a negative peak hold timing,
The first signal corresponding to the second positive / negative timing determination signal
And a fourth peak holding means for holding the signal level of the second detection signal as a fourth peak hold signal at the signal level transition timing of the waveform shaping signal.

According to a sixth aspect of the present invention, there is provided a light transmitting member on which a predetermined optical pattern having an absorption area and a transmission area is formed, and the light transmitting member is irradiated with first detection light, and the light transmitting member is irradiated with the first detection light. A first detection unit that receives the transmitted first detection light and outputs a first detection signal corresponding to the optical pattern, and is disposed at a predetermined angle away from the first detection unit and a rotation center; Irradiating the light transmitting member with second detection light;
Receiving a second detection light transmitted through the light transmitting member and outputting a second detection signal corresponding to the optical pattern;
Detecting means for determining a peak signal level of the first detection signal at a signal level transition timing of the second waveform shaping signal;
First peak determination and holding means for holding, second peak determination and holding means for determining and holding the peak signal level of the second detection signal at the signal level transition timing of the first waveform shaping signal, and First waveform shaping means for shaping the waveform of the first detection signal based on a peak signal level and outputting the same as the first waveform shaping signal; and the second detection signal based on a peak signal level of the second detection signal. And a second waveform shaping means for performing the waveform shaping and outputting as the second waveform shaping signal.

According to a seventh aspect of the present invention, in the configuration of the sixth aspect, the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data, The first waveform shaping signal is sampled at a signal level transition timing of the second waveform shaping signal to obtain second sampling data, and based on the first sampling data and the second sampling data, Signal processing means for calculating a rotation direction and a rotation angle relative to the first detection means and the second detection means.

According to an eighth aspect of the present invention, in the configuration of the seventh aspect, the signal processing means is configured to rotate the light transmitting member relative to the first detection means and the second detection means in a forward direction. A normal / reverse rotation discriminating means for discriminating between the direction and the reverse rotation direction and outputting a normal / reverse rotation discrimination signal, wherein the first peak confirmation holding means includes a signal level transition timing of the second waveform shaping signal; A first positive / negative signal for determining whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the forward / reverse determination signal and outputting a first positive / negative timing determination signal. A negative timing discriminating means, wherein when the first positive / negative timing discriminating signal corresponds to a positive peak hold timing, the first positive / negative timing discriminating signal corresponds to the first positive / negative timing discriminating signal; A first peak hold means for holding the signal level transition timing of the waveform adjusting signal a signal level of the first detection signal as a first peak hold signal,
When the first positive / negative timing discrimination signal corresponds to the negative peak hold timing, the first detection signal of the first detection signal is transmitted at the signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal. And a second peak hold means for holding the signal level as a second peak hold signal, wherein the second peak confirmation holding circuit includes a signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. A second positive / negative timing determining means for determining whether the signal level transition timing of the first waveform shaping signal is a positive peak hold timing or a negative peak hold timing and outputting a second positive / negative timing determination signal, When the second positive / negative timing discrimination signal corresponds to the positive peak hold timing, the second
Third peak hold means for holding a signal level of the second detection signal as a third peak hold signal at a signal level transition timing of the first waveform shaping signal corresponding to a positive / negative timing discrimination signal; When the negative timing determination signal corresponds to the negative peak hold timing, the signal level of the second detection signal is changed to the fourth level at the signal level transition timing of the first waveform shaping signal corresponding to the second positive / negative timing determination signal. And a fourth peak hold means for holding as a peak hold signal.

According to a ninth aspect of the present invention, in the configuration of the fifth or eighth aspect, the first waveform shaping means comprises:
Dividing the voltage difference between the first peak hold signal and the second peak hold signal by a predetermined first voltage division ratio to obtain the first voltage;
Generating a reference level signal, wherein the first detection signal and the first
Performs waveform shaping by comparing reference level signals,
The second waveform shaping means determines a voltage difference between the third peak hold signal and the fourth peak hold signal by a predetermined second voltage.
The second reference level signal is generated by dividing the voltage by a voltage dividing ratio, and the waveform is shaped by comparing the second detection signal with the second reference level signal.

According to a tenth aspect, in the configuration according to any one of the third to fifth aspects, the reflecting member is rotated relatively to the first detecting means and the second detecting means. The separation angle between the first detection means and the second detection means is set such that the phase of the first detection signal and the phase of the second detection signal output in the event of It is characterized by:

According to an eleventh aspect of the present invention, in the configuration according to any one of the third to fifth aspects, the optical pattern includes the absorption region absorbing the first detection light and the second detection light. The reflection areas that reflect the first detection light and the second detection light are alternately formed such that the angle θ2 about the rotation center is 360 / n [゜] (n is an even number), An angle θ1 formed by a line connecting each of the first detection means or the second detection means and the rotation center is defined as θ1 = (θ2 × m) + θ2 / 2 (where m is an integer). Features. According to a twelfth aspect of the present invention, in the configuration according to any one of the third to fifth aspects, the reflecting member is formed in an annular rotating bezel, and the first detecting means and the second detecting means are provided. The means has a band portion that can be wrapped around the user's wrist, and is characterized in that the rotating bezel is formed on a wristwatch-type main body side that is rotatably mounted.

According to a thirteenth aspect of the present invention, a reflecting member on which a predetermined optical pattern having an absorbing region and a reflecting region is formed, and the reflecting member is irradiated with first detection light and reflected by the reflecting member. A first sensor that receives the first detection light and outputs a first detection signal corresponding to the optical pattern, and is disposed at a predetermined angle away from the first sensor and a rotation center, and A second sensor that irradiates a second detection light, receives the reflected second detection light, and outputs a second detection signal corresponding to the optical pattern; A first peak determination holding circuit for determining and holding the peak signal level of the first detection signal; and a second peak determination and holding circuit for determining and holding the peak signal level of the second detection signal at the signal level transition timing of the first waveform shaping signal. Pi And a first comparator that shapes the waveform of the first detection signal based on the peak signal level of the first detection signal and outputs the resulting signal as the first waveform shaping signal. And a second comparator for shaping the waveform of the second detection signal based on the signal level and outputting the shaped signal as the second waveform shaping signal.

According to a fourteenth aspect of the present invention, in the configuration of the thirteenth aspect, the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data, The first waveform shaping signal has the first level
The second sampling data is obtained by sampling the waveform shaping signal, and the first sampling data and the second sampling data are obtained.
Based on the sampling data, the first
A signal processing circuit for calculating a rotation direction and a rotation angle relative to the sensor and the second sensor.

According to a fifteenth aspect of the present invention, in the configuration of the fourteenth aspect, the signal processing circuit is configured such that a rotational direction of the reflection member relative to the first sensor and the second sensor is a normal rotation direction or a reverse rotation direction. A forward / reverse determination circuit for determining whether the direction is the first direction and outputting a forward / reverse determination signal;
The peak determination holding circuit determines whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the signal level transition timing of the second waveform shaping signal and the forward / reverse determination signal. A first positive / negative timing discriminating circuit for discriminating whether the signal is positive or negative and outputting a first positive / negative timing discriminating signal;
When the negative timing determination signal corresponds to the positive peak hold timing, the signal level of the first detection signal is changed to the first level at the signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing determination signal. A first peak hold circuit that holds the signal as a peak hold signal; and, when the first positive / negative timing determination signal corresponds to a negative peak hold timing, the second waveform shaping corresponding to the first positive / negative timing determination signal. The signal level of the first detection signal is changed to the second signal level at the signal level transition timing of the signal.
And a second peak hold circuit that holds the signal as a peak hold signal, wherein the second peak determination holding circuit is configured to perform the second peak hold circuit based on a signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. It is determined whether the signal level transition timing of the first waveform shaping signal is a positive peak hold timing or a negative peak hold timing, and the second positive /
A second positive / negative timing discriminating circuit for outputting a negative timing discriminating signal; and, when the second positive / negative timing discriminating signal corresponds to a positive peak hold timing, the second positive / negative discriminating signal corresponding to the second positive / negative timing discriminating signal Holding the signal level of the second detection signal as a third peak hold signal at the signal level transition timing of the first waveform shaping signal;
When the peak hold circuit and the second positive / negative timing determination signal correspond to a negative peak hold timing,
The first signal corresponding to the second positive / negative timing determination signal
A fourth peak hold circuit that holds the signal level of the second detection signal as a fourth peak hold signal at the signal level transition timing of the waveform shaping signal.

According to a preferred embodiment of the present invention, the first detection light is applied to the reflection member on which the predetermined optical pattern having the absorption area and the reflection area is formed, and the first detection light is reflected by the reflection member. And a first sensor for receiving a first detection signal corresponding to the optical pattern and outputting a first detection signal corresponding to the optical pattern. The first sensor is disposed at a predetermined angle away from the rotation center of the first sensor. And a second sensor for receiving the reflected second detection light and outputting a second detection signal corresponding to the optical pattern, wherein the second waveform shaping signal is A first peak determining and holding step of determining and holding a peak signal level of the first detection signal at a signal level transition timing; and a peak signal level of the second detection signal at a signal level transition timing of the first waveform shaping signal. To confirm the Le, a second peak deterministic holding step of holding, the first performing waveform shaping of said first detection signal based on the peak signal level of the first detection signal
A first waveform shaping step of outputting as a waveform shaping signal, and a second waveform shaping step of shaping the waveform of the second detection signal based on a peak signal level of the second detection signal and outputting the same as the second waveform shaping signal And, it is characterized by having.

According to a seventeenth aspect, in the configuration of the sixteenth aspect, the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data, The first waveform shaping signal has the first level at the signal level transition timing.
The second sampling data is obtained by sampling the waveform shaping signal, and the first sampling data and the second sampling data are obtained.
Based on the sampling data, the first
A signal processing step of calculating a rotation direction and a rotation angle relative to the sensor and the second sensor.

According to a eighteenth aspect of the present invention, in the configuration according to the seventeenth aspect, in the signal processing step, a relative rotation direction of the reflection member with respect to the first sensor and the second sensor is a normal rotation direction or a reverse rotation direction. A first rotation / reverse rotation determining step of determining whether the rotation is in the first direction and outputting a forward rotation / reverse rotation determination signal;
In the peak confirmation holding step, the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the signal level transition timing of the second waveform shaping signal and the forward / reverse determination signal. A first positive / negative timing determining step of determining whether or not the first positive / negative timing signal is output;
When the negative timing determination signal corresponds to the positive peak hold timing, the signal level of the first detection signal is changed to the first level at the signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing determination signal. A first peak hold step of holding the signal as a peak hold signal, and, if the first positive / negative timing determination signal corresponds to a negative peak hold timing, the second waveform shaping corresponding to the first positive / negative timing determination signal The signal level of the first detection signal is changed to the second signal level at the signal level transition timing of the signal.
A second peak hold step of holding as a peak hold signal, wherein the second peak confirmation holding step is based on the signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. It is determined whether the signal level transition timing of the first waveform shaping signal is a positive peak hold timing or a negative peak hold timing, and the second positive /
A second positive / negative timing determining step of outputting a negative timing determining signal; and, when the second positive / negative timing determining signal corresponds to a positive peak hold timing, the second positive / negative timing determining signal corresponding to the second positive / negative timing determining signal. Holding the signal level of the second detection signal as a third peak hold signal at the signal level transition timing of the first waveform shaping signal;
A peak hold step, and when the second positive / negative timing determination signal corresponds to a negative peak hold timing,
The first signal corresponding to the second positive / negative timing determination signal
And a fourth peak hold step of holding the signal level of the second detection signal as a fourth peak hold signal at the signal level transition timing of the waveform shaping signal.

[0022]

Preferred embodiments of the present invention will now be described with reference to the drawings. [1] Embodiment [1.1] Configuration of Embodiment [1.1.1] Configuration of Wristwatch-Type Data Information Processing Apparatus FIG. 1 is a front view of a wristwatch-type data information processing apparatus having a rotation detection device of the present invention. Show. Wristwatch type information processing device 10
A rotating bezel 102 formed in an annular shape is slidably disposed on the upper portion (front side in the drawing) of the main body 101 of the main body 101. On the upper surface of the rotating bezel 102, characters such as "A, I, U, ..., 9, ..." are formed at regular intervals by printing or the like. A cover glass 103 is provided on the inner peripheral side of the rotating bezel 102, and information and the like input to the wristwatch-type information processing apparatus 100 are displayed on the lower surface side (back side of the paper) of the cover glass 103. A display unit 104 is provided.

A rotating bezel 1 is provided on the upper side of the display unit 104 in the drawing.
An instruction mark 110 for instructing one of characters and the like formed on the reference numeral 02 is formed by printing or the like. Also, the main body 10
1, the confirm switch 105 and the delete switch 10
6, a cloud point switch 107 and an origin switch 108 are provided. Note that these switches may be provided on the cover glass 103. FIG. 2 shows a state in which the rotating bezel 102 has been removed from the wristwatch-type information processing apparatus 100. As shown in FIG. 2, holes 31a and 31b are formed in the main body 101, and the holes 31a and 31b are formed.
A first sensor unit 32 functioning as a first detecting unit and a second sensor unit 33 functioning as a second detecting unit are arranged in 31b.

In this case, the first sensor unit 3
2 and the line connecting the rotation center O of the rotating bezel 102 and the second
A line connecting the sensor unit 33 and the center of rotation O forms an angle θ.
1 to form the first sensor unit 32 and the second
The sensor units 33 are arranged respectively. Also,
The first sensor unit 32 is provided with the above-described instruction mark 110.
Are arranged below (in the back side of the paper of FIG. 2) below the character or the like (“A” in FIG. 2). The angle θ1 will be described later.

FIG. 3 is a view taken along the line IV-IV in FIG. As shown in FIG. 3, an optical pattern 41 is formed on a lower surface of the rotating bezel 102 at a position corresponding to a character or the like formed on an upper surface of the rotating bezel 102. A sensor cover glass 42 is attached to the main body 101 below the surface on which the optical pattern 41 is formed. At this time, a packing 43 is provided between the main body 101 and the sensor cover glass 42, thereby preventing entry of water or the like into a lower portion of the sensor cover glass 42. The first sensor unit 32 is provided below the sensor cover glass 42.

The first sensor unit 32 includes an LED (Ligh
t Emitting Diode) 44, photodiode 45,
A light-shielding plate 44a disposed between the LED 44 and the photodiode 45 and a substrate 46 are provided.
D44 emits and irradiates the first detection light L1 toward the optical pattern 41, the reflected light is received by the photodiode 45, and the first detection signal A is generated based on the received first detection light L1.
Generate Similarly, the second sensor unit 33 includes an LED
46 (see FIG. 7), a photodiode 47 (see FIG. 7), a light-shielding plate disposed between the LED 46 and the photodiode 47, and a substrate.
46 emits and irradiates the second detection light L2 toward the optical pattern 41, the reflected light is received by the photodiode 47, and the second detection signal B is generated based on the received second detection light L2.
Generate

The first detection signal A generated by the first sensor unit 32 and the second detection signal B generated by the second sensor unit 33 are counted by an information processing section 81 (see FIG. 6) described later. Rotating bezel 10
2 is detected. A contact spring 47 is provided below the substrate 46 of the first sensor unit 32, and the contact spring 47 causes the first sensor unit 32, the second sensor unit 33, the CPU of the wristwatch-type information processing apparatus 100, and the like to operate. It is electrically connected.
Note that a lead wire may be provided instead of the contact spring 47.

As shown in FIG. 2 and FIG.
A groove 34 is formed on the circumference of the upper part. on the other hand,
As shown in FIG. 3, on the lower surface of the rotating bezel 102, a protruding ridge 46 protruding downward is formed. The protruding ridge 46 is slidably fitted in the groove 34. Also, rotating bezel 1
An O-ring 47 is arranged between the right side surface of the figure 02 and the main body 101 to prevent water, light, or the like from entering the inside of the wristwatch-type information processing apparatus 100.

[1.1.2] Optical Pattern Next, the optical pattern 41 will be described. FIG. 4 is a diagram illustrating the lower surface of the rotating bezel 102 functioning as a reflecting member. The optical pattern 41 is, as shown in FIG.
D44 and an absorption area 41a for absorbing the light emitted by D44
Forty-four reflection areas 41b for reflecting light are formed alternately. At this time, the absorption region 41a and the reflection region 41b are formed at every angle θ2 about the rotation center O.

In this case, the rotating bezel 1 described above is used.
When there are n characters (n is an even number) formed on the upper surface of 02, θ2 = 360 / n [゜]. When the user rotates the rotating bezel 102, the first sensor unit 32 alternately reads the absorption area 41a and the reflection area 41b of the optical pattern 41 shown in FIG. ), The first detection signal A having a substantially sinusoidal waveform can be generated. On the other hand, the second sensor unit 33 similarly generates the second detection signal B having a substantially sinusoidal waveform as shown in FIG. In this case, as described in detail later, the phases of the first detection signal A and the second detection signal B are shifted from each other by 吸収 wavelength so that the absorption area 41a and the reflection area 41b and the first sensor unit 32 and the second The arrangement of the sensor units 33 is set.

[1.1.3] Arrangement of Sensor Unit Next, the first sensor unit 32 and the second sensor unit 3
3 will be described. In the present embodiment, the first sensor unit 32 and the second sensor unit 33 are arranged so that θ1 = (θ2 × m) + θ2 / 2. Here, m is an integer. Thereby, when the rotating bezel 102 is rotated by the user,
The first detection signal A generated by the first sensor unit 32 and the second detection signal B generated by the second sensor unit 33 are 1 /
A phase difference of 4 will occur.

As shown in FIG. 5, when the rotating bezel 102 is rotated clockwise, the second sensor unit 33 is rotated.
Generates a 1/4 phase advance from the first detection signal A generated by the first sensor unit 32 in the second detection signal B generated by
When the rotating bezel 102 is rotated counterclockwise,
The pulse signal generated by the second sensor unit 33 has a 遅 れ phase delay from the pulse signal generated by the first sensor unit 32. By detecting such a phase delay / phase advance, it is possible to detect the rotation direction of the rotating bezel 102 as described later.

[1.1.4] Functional Configuration Next, information such as characters is generated from the rotation angle and rotation direction of the rotating bezel 102 detected as described above, displayed on the display unit 104, and stored. Fig. 6
This will be described with reference to FIG. The information processing section 111 has a pulse number counter and a forward / reverse inversion detecting section, and outputs the first detection signal A generated by the first sensor unit 32 and the second detection signal B generated by the second sensor unit 33 The information data is generated based on the information data, and the information data determined by the user is stored in the memory 113. At this time, the information processing section 111 generates an information signal by referring to the information table 112 in which information data corresponding to the rotation position of the rotating bezel 102 is stored. The character generator 114 displays information such as characters on the display unit 104 based on the information signal thus generated.

The origin switch 108 switches the wristwatch-type information processing apparatus 100 to an information input state. When the origin switch 108 is turned on, the pulse number counter of the information processing section 81 is reset to 0, and the first sensor The detection of the rotation angle and the rotation direction of the rotating bezel 102 by the unit 32 and the second sensor unit 33 is started. Confirm switch 105, delete switch 10
Reference numeral 6 is for confirming or deleting the information data generated in the information processing section 81, respectively. When the information generated by the information processing unit 111 is a kana character, the voiced dot switch 107 is used to add a voiced dot. When the information is in English characters, the voiced dot switch 107 has a function of switching between lowercase and uppercase.

The information generated by the information processing section 111 is not limited to character information, but may include character editing such as line feed, and mode switching (for example, switching between a time display mode and a character input mode) in the information processing apparatus. It is also possible to generate command data. In this case, the information table 11
2 stores instruction information such as character editing and mode switching corresponding to the rotational position of the rotating bezel 102, and the information processing section 81 generates instruction data based on the detected rotational position of the rotating bezel 102. Will be done.

[1.1.5] Specific Configurations of Information Processing Unit and Sensor Unit Next, specific configurations of the information processing unit 111, the first sensor unit 32, and the second sensor unit 33 will be described with reference to FIG. explain. First, a schematic configuration of the information processing unit 111 will be described. The information processing section 111 outputs the first detection signal A
The first waveform shaping circuit 50 outputs the first waveform shaping signal SA, and determines the rising / falling of the first waveform shaping signal SA, and outputs the first up / down determination signal AU / D. A first up / down determination circuit 51, a first waveform shaping signal SA and a first up / down determination signal AU / D
Based on the optical pattern and thus the rotating bezel 102
First sensor unit 32 and second sensor unit 33
And a first forward / reverse determination circuit 52 that determines a relative rotation direction with respect to and outputs a first rotation direction determination signal ARD.

The information processing section 111 performs a waveform shaping of the second detection signal B and outputs a second waveform shaping signal SB, and a rising / falling edge of the second waveform shaping signal SB. A second up / down inverting circuit 54 that determines a fall and outputs a second up / down determination signal BU / D;
Second waveform shaping signal SB and second up / down determination signal BU
/ D based on the optical pattern and thus the rotating bezel 10
2nd second sensor unit 32 and 2nd sensor unit 3
And a second forward / reverse determination circuit 55 that determines a rotation direction relative to the third and outputs a second rotation direction determination signal BRD. Further, the information processing section 111
A first detection timing generation circuit 56 that outputs a first detection timing signal SD1 to an initialization circuit 58 described later based on the waveform shaping signal SA and the first up / down determination signal AU / D.
A second detection timing generation circuit 57 that outputs a second detection timing signal SD2 to an initialization circuit 58, which will be described later, based on the second waveform shaping signal SB and the second up / down determination signal BU / D, and an initialization signal SINIT On input (for example, SINIT
= “L” level), the input of the first detection timing signal SD1 to the first waveform shaping circuit 50 is inhibited, the initial reference level signal SREFI is input, and the second waveform shaping circuit 53 is input to the second waveform shaping circuit 53. Initial setting circuit 58 for inhibiting input of detection timing signal SD2 and inputting initial reference level signal SREI.
A first up / down determination signal AU / D, a first rotation direction determination signal ARD, a second up / down determination signal BU / D, and a second
A signal processing unit 59 for calculating the relative rotation angle of the rotating bezel 102 with respect to the first sensor unit 32 and the second sensor unit based on the rotation direction determination signal BRD. ing.

The first sensor unit 32 receives the first detection light L
An LED (Light Emitting Diode) 44 for emitting 1;
A photodiode 45 that receives the first detection light L1 reflected by the optical pattern 41 and outputs it as a first detection signal A via the first transistor Q1. Similarly, the second sensor unit 33
LED 46 for emitting detection light L2, optical pattern 41
And a photodiode 47 that receives the second detection light L2 reflected by the second detection signal B and outputs it as a second detection signal B via the second transistor Q2. The first waveform shaping circuit 50 includes a first peak hold circuit 60 that holds a positive peak signal level of the first detection signal A as a first peak hold signal SP1, and a second peak hold circuit 60 that holds a negative peak signal level of the first detection signal A as a second peak signal. A second peak hold circuit 61 for holding as a hold signal SP2, and a first reference level for generating and outputting a first reference level signal SREF1 by dividing a voltage difference between the first peak hold signal SP1 and the second peak hold signal SP2. First voltage dividing circuit 62 functioning as signal generating means
A first switch 63 for inhibiting input of the first detection signal A to the first peak hold circuit 60 when the initialization signal SINIT is input; and a second peak hold circuit 61 for the first detection signal A when the initialization signal SINIT is input. A second switch 64 for inhibiting input to the first switch and a first switch based on the first reference level signal SREF1.
A comparator 65 for shaping the waveform of the detection signal A and outputting a first waveform shaping signal SA.

The second waveform shaping circuit 53 outputs the second detection signal B
A third peak hold circuit 66 for holding the positive peak signal level of the second detection signal B as the third peak hold signal SP3, and a fourth peak hold circuit 67 for holding the negative peak signal level of the second detection signal B as the fourth peak hold signal SP4. , The third peak hold signal SP3 and the fourth peak hold signal S
A second voltage dividing circuit 68 which functions as a second reference level signal generating means for generating and outputting a second reference level signal SREF2 by dividing the difference voltage of P4;
A first switch 69 for inhibiting the input of the detection signal B to the third peak hold circuit 66, and a second switch 70 for inhibiting the input of the second detection signal B to the fourth peak hold circuit 67 when the initialization signal SINIT is input. And the second reference level signal S
The waveform of the second detection signal B is shaped based on REF2,
And a comparator 71 for outputting the waveform shaping signal SB.

The first up / down determination circuit 51 has two inverters and a low-pass filter connected in series, and delays the first waveform shaping signal SA by a predetermined time to make a first delay.
The first up / down determination signal AU / D is obtained by taking the logical product (AND) of the delay circuit 75 that outputs the waveform shaping signal DSA and the first waveform shaping signal SA and the delayed first waveform shaping signal DSA.
And an AND circuit 76 that outputs a first up determination signal AUP that goes to “H” level when the first waveform shaping signal SA rises, a first waveform shaping signal SA and a delay
The first up / down determination signal AU / D is formed by taking the negation (NAND) of the logical product of the waveform shaping signal DSA. A NAND circuit 77 for outputting an ADN,
It is provided with. The first forward / reverse determination circuit 52
Exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, which is shared with the second normal / reverse determination circuit 55
An EXOR circuit 78 that takes the logical OR (OR) of the first up determination signal AUP and the first down determination signal ADN
The output of the circuit 79 and the EXOR circuit 78 is input to the data terminal D, and the output of the OR circuit 79 is input to the clock terminal / CK.
And a D flip-flop circuit 80 that outputs a first rotation direction determination signal ARD from a data output terminal Q.

The second up / down judgment circuit 54 has two inverters and a low-pass filter connected in series, and delays the second waveform shaping signal SB by a predetermined time to delay the second signal.
The logical product (AND) of the delay circuit 85 that outputs the waveform shaping signal DSB and the second waveform shaping signal SB and the delayed second waveform shaping signal DSB is taken, and the second up / down determination signal BU / D is obtained.
And an AND circuit 86 that outputs a first up determination signal BUP that becomes “H” level when the second waveform shaping signal SB rises, a second waveform shaping signal SB and a delay second
The first up / down determination signal BU / D is formed by taking the negation (NAND) of the logical product of the waveform shaping signal DSB, and the first down determination signal which becomes “H” level when the second waveform shaping signal SB falls. A NAND circuit 87 for outputting BDN;
It is provided with. The second forward / reverse determination circuit 55
Exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, which is shared with the first normal / reverse determination circuit 52
An EXOR circuit 78 which takes a logical sum (OR) of a second up determination signal BUP and a second down determination signal BDN
The output of the circuit 89 and the EXOR circuit 78 are input to the data terminal D, and the output of the OR circuit 89 is input to the clock terminal / CK.
And a D flip-flop circuit 90 that outputs a second rotation direction determination signal BRD from a data output terminal Q.

The first detection timing generation circuit 56
The AND circuit 95 calculates the logical product (AND) of the down determination signal BDN and the second rotation direction determination signal BRD, and calculates the logical product (AND) of the inverted signal of the second up determination signal BUP and the second rotation direction determination signal BRD. An AND circuit 96, an OR circuit 97 that performs a logical sum (OR) of an output signal of the AND circuit 95 and an output signal of the AND circuit 96, and a second up determination signal B
An AND circuit 98 that calculates the logical product (AND) of the UP and the second rotation direction determination signal BRD, and the logical product (AN) of the inverted signal of the second down determination signal BDNP and the second rotation direction determination signal BRD
D), and an OR circuit 120 that performs a logical sum (OR) of an output signal of the AND circuit 98 and an output signal of the AND circuit 99. The second detection timing generation circuit 57 outputs a first up determination signal AUP
AND circuit 121 which takes the logical product (AND) of the first rotation direction determination signal ARD and the logical product (AN) of the first down determination signal ADNP and the inverted signal of the first rotation direction determination signal ARD
D), and the logical sum (O) of the output signal of the AND circuit 121 and the output signal of the AND circuit 122
R) of the OR circuit 123 and a first down determination signal ADN
AND circuit 124 which takes the logical product (AND) of the first rotation direction determination signal ARD and the logical product (AND) of the first up determination signal AUP and the inverted signal of the first rotation direction determination signal ARD
, And an OR circuit 126 for calculating a logical sum (OR) of the output signal of the AND circuit 124 and the output signal of the AND circuit 125.

The initial setting circuit 58 includes an initial reference level signal generation circuit 130 for generating an initial reference level signal SREFI.
An inverter 131 for inverting the initialization signal SINIT;
A switch 132 which is turned on (closed) to input an initial reference level signal SRREF to the first peak hold circuit 60 when the initialization signal SINIT is at "L"level; and an initialization signal SIN.
When the IT is at "L" level, the initial reference level signal
A switch 133 that is turned on (closed) to be input to the peak hold circuit 61; Switch 1 that becomes
34, and a switch 135 which is turned on (closed) to input the initial reference level signal SREI to the fourth peak hold circuit 67 when the initialization signal SINIT is at "L" level.

The initialization circuit 58 outputs an initialization signal S
The logical product (AND) of INIT and the output signal of the OR circuit 97 is obtained, and the first switch 63 is turned off (open) when the initialization signal SINIT is at the “L” level, so that the first detection signal A becomes the first peak hold circuit 60. AND that prohibits input to
The logical product (AND) of the circuit 136 and the output signal of the OR circuit 120 and the initialization signal SINIT is calculated, and the initialization signal SINIT
At the “L” level, the second switch 64 is turned off (opened) to prevent the first detection signal A from being input to the second peak hold circuit 61, the initialization signal SINIT and the OR circuit 123 AND of output signals of
D), and when the initialization signal SINIT is at the “L” level, the first
An AND circuit 138 for turning off the switch 69 to prevent the second detection signal B from being input to the third peak hold circuit 66; an initialization signal SINIT and an OR circuit 1;
The logical product (AND) of the output signals of the output signals 26 is taken, and the second switch 70 is turned off (open) when the initialization signal SINIT is at the “L” level, and the second detection signal B is input to the second peak hold circuit 67. AND circuit 139 that inhibits
And is provided.

[1.1.6] Specific Operation of Information Processing Unit and Sensor Unit Next, specific initial operation and normal operation of the information processing unit 11, the first sensor unit 32, and the second sensor unit 33 will be described. This will be described with reference to FIG. [1.1.6.1] Initial Operation In the initial operation, the initialization signal SINIT is set to the “L” level. Also, the initial reference level signal generation circuit 130
Generates an initial reference level signal SREFI by dividing the power supply voltage. Further, the inverter 131 outputs the initialization signal SIN
IT is inverted and output to switches 132-135. As a result, the switch 132 of the initial setting circuit 58 switches the initial reference level signal SREFI to the first peak hold circuit 60.
Is turned on (closed) in order to input to. Switch 1
33 is turned on (closed) to input the initial reference level signal SREFI to the second peak hold circuit 61. Further, the switch 134 is turned on (closed) to input the initial reference level signal SREFI to the third peak hold circuit 66. Further, the switch 135 is turned on (closed) to input the initial reference level signal SREFI to the fourth peak hold circuit 67.

Then, the first peak hold circuit 60 of the first waveform shaping circuit 50 holds the signal level of the initial reference level signal SREFI as the first peak hold signal SP1. Further, the second peak hold circuit 61 holds the signal level of the initial reference level signal SREI as the second peak hold signal SP2. As a result, the first voltage dividing circuit 62
A first reference level signal SREF1 of 0 [V] is generated and output to the comparator 65. On the other hand, the first sensor unit 32
LED emits the first detection light L1, and the optical pattern 4
Irradiate 1 Thereby, the photodiode 45
The first detection light L1 reflected by the optical pattern 41 is received, and the first detection signal A is output to the comparator 65.

The comparator 65 shapes the waveform of the first detection signal A based on the first reference level signal SREF1, outputs the first waveform shaping signal SA to the first up / down determination circuit 51, and performs the first up / down determination. When the first waveform shaping signal SA rises, the circuit 51 outputs an “H” level first up determination signal AUP based on the first waveform shaping signal SA to the signal processing unit 59 and the first detection timing generation circuit 5.
6 and outputs the “H” level first down determination signal ADN to the signal processing unit 59 and the first detection timing generation circuit 56 when the first waveform shaping signal SA falls. On the other hand, the third peak hold circuit 66 of the second waveform shaping circuit 53 holds the signal level of the initial reference level signal SREI as the third peak hold signal SP3. Further, the fourth peak hold circuit 67 holds the signal level of the initial reference level signal SREI as the fourth peak hold signal SP4. As a result, the second voltage dividing circuit 68
A first reference level signal SREF1 of [V] is generated and output to the comparator 71. On the other hand, the LED 46 of the second sensor unit 33 emits the second detection light L <b> 2 and irradiates the optical pattern 41.

As a result, the photodiode 47 receives the second detection light L2 reflected by the optical pattern 41, and outputs the second detection signal B to the comparator 71. The comparator 71 shapes the waveform of the second detection signal B based on the second reference level signal SREF2, outputs the second waveform shaping signal SB to the second up / down determination circuit 54, and the second up / down determination circuit 54 , Based on the second waveform shaping signal SB, when the second waveform shaping signal SB rises,
An "H" level second up determination signal BUP is output to the signal processing unit 59 and the second detection timing generation circuit 57, and when the second waveform shaping signal SB falls, "H" is output.
The signal processing unit 5 outputs the second down judgment signal BDN of the level.
9 and the second detection timing generation circuit 57. On the other hand, the EXOR circuit 78 of the first normal / reverse determination circuit 52 takes an exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, and the OR circuit 79 outputs the first up determination signal AUP. AND (OR) of the first down determination signal ADN (O
Take R). Then, the D flip-flop circuit 80
The output of the EXOR circuit 78 is input to the data terminal D,
The output of the R circuit 79 is input to the clock terminal / CK, and the first rotation direction determination signal ARD is output from the data output terminal Q to the signal processing unit 59.

The EXOR of the second normal / reverse determination circuit 55
The circuit 78 takes an exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, and performs an OR circuit 89
Are the second up determination signal BUP and the second down determination signal B
The logical sum (OR) of the DN is taken. Then, the D flip-flop circuit 90 outputs the data from the EXOR circuit 78 to the data terminal D.
And the output of the OR circuit 89 is supplied to the clock terminal / C
It is input to K, and the second rotation direction determination signal BRD is output to the signal processing unit 59 from the data output terminal Q. Accordingly, the signal processing unit 59 outputs the first up / down determination signal AU / D (= AUP and ADN), the first rotation direction determination signal ARD, and the second up / down determination signal BU / D (=
BUP and BDN) and the second rotation direction determination signal BRD.
The rotation angle relative to the first and second sensor units 32 and 32 is calculated. Accordingly, in the initial operation state, since the reference signal levels of the comparator 65 and the comparator 71 become a predetermined signal level (fixed to 0 [V] in the above example), the detection accuracy is reduced, but the rotating bezel 102 is surely removed. Can be detected.

[1.1.6.2] Normal Operation When the above initial operation is completed, the operation shifts to the normal operation. In the normal operation, the initialization signal SINIT is set to "H".
Level. The inverter 131 inverts the initialization signal SINIT and outputs the inverted signal to the switches 132 to 135. Thus, the switch 132 of the initial setting circuit 58
135 are all turned off. In the following description, at the end of the initial operation,
First rotation direction determination signal ARD = “H” level (ie,
Forward rotation direction), second rotation direction determination signal BRD = "H"
Level (that is, equivalent to the forward rotation direction), first up determination signal AUP = “H” level, first down determination signal ADN =
The case where the “L” level, the second up determination signal BUP = “L” level, and the second down determination signal BDN = “H” level will be described.

[1.1.1.6.2.1] Operation of First Detection Timing Generation Circuit and First Waveform Shaping Circuit The AND circuit 95 of the first detection timing generation circuit 56
The logical product (AND) of the second down determination signal BDN (= “H”) and the second rotation direction determination signal BRD (= “H”) is obtained,
An “H” level signal is output to the OR circuit 97. Also,
The AND circuit 96 outputs the second up determination signal BUP (=
"L") and an inverted signal of the second rotation direction determination signal BRD (=
A logical product (AND) of “L”) is obtained, and an “L” level signal is output to the OR circuit 97. Thereby, the OR circuit 97
Output an "H" level signal to the AND circuit 136. At this point, the initialization signal SINIT is
Since it is at the “H” level, the AND circuit 136 outputs “H”
A level signal is output to the switch 63, the switch 63 is turned on, the first detection signal A is input to the first peak hold circuit 60, and the first peak hold circuit 60
The positive signal level of the first detection signal A (finally, the positive peak signal level) is held as the first peak hold signal SP1.

On the other hand, the AND circuit 98 takes a logical product (AND) of the second up determination signal BUP (= “L” level) and the second rotation direction determination signal BRD (= “H” level),
The signal of “L” level is output to the OR circuit 120. Also,
The AND circuit 99 outputs the second down determination signal BDN (=
"H") and an inverted signal of the second rotation direction determination signal BRD (=
The logical product (AND) of “L”) is obtained, and an “L” level signal is output to the OR circuit 120. As a result, the OR circuit 120 outputs the “L” level signal to the AND circuit 1.
37. Therefore, the AND circuit 136
Outputs an "L" level signal to the switch 64, the switch 64 is turned off, and the second peak hold circuit 6
1 indicates that the previous negative signal level (finally the negative peak signal level) of the first detection signal A is the second peak hold signal SP2
Will be held.

As a result, the first voltage dividing circuit 62 divides the voltage difference between the first peak hold signal SP1 and the second peak hold signal SP2, generates a first reference level signal SREF1, and outputs it to the comparator 65. On the other hand, the LED of the first sensor unit 32 emits the first detection light L <b> 1 and irradiates the optical pattern 41. Thereby, the photodiode 45
Is the first detection light L1 reflected by the optical pattern 41
And outputs the first detection signal A to the comparator 65. The comparator 65 shapes the waveform of the first detection signal A based on the first reference level signal SREF1, and outputs the first waveform shaping signal SA to the first up / down determination circuit 51;
The first up / down determination circuit 51 outputs the first waveform shaping signal S
At the time of rising of the first waveform shaping signal SA, the first waveform shaping signal SA is output to the signal processing unit 59 and the first detection timing generation circuit 56 at the “H” level based on A. When falling,
An “H” level first down determination signal ADN is output to the signal processing unit 59 and the first detection timing generation circuit 56.

On the other hand, the EXOR of the first forward / reverse determination circuit 52
The circuit 78 takes an exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, and performs an OR circuit 79
Are the first up determination signal AUP and the first down determination signal A
The logical sum (OR) of the DN is taken. The D flip-flop circuit 80 outputs the data from the EXOR circuit 78 to the data terminal D.
And the output of the OR circuit 79 is connected to the clock terminal / CK
And outputs the first rotation direction determination signal ARD from the data output terminal Q to the signal processing unit 59.
Accordingly, the signal processing unit 59 outputs the first up / down determination signal AU / D (= AUP and ADN), the first rotation direction determination signal ARD, and the second up / down determination signal BU / D (= BUP).
And BDN) and the second rotation direction determination signal BRD, and the relative rotation angle of the rotating bezel 102 with respect to the first sensor unit 32 and the second sensor unit is calculated.

In this way, as shown in FIG.
Even when the amplitude of the detection signal A is small and the amplitude of the second detection signal B is large, the first reference level signal SREF1 is sequentially and appropriately adjusted in accordance with the fluctuation of the first detection signal A as shown in FIG. Since the signal level is set, the first waveform shaping signal SA close to the ideal first waveform shaping signal shown in FIG. 10B can be obtained, and the adjustment step is not provided without the adjustment step. The detection accuracy can be automatically increased sequentially, and the rotation direction and the rotation angle of the rotating bezel 102 can be reliably detected. The same effect can be obtained when the amplitude of the first detection signal A is large and the amplitude of the second detection signal B is small.

[1.1.2.6.2.2] Operation of Second Detection Timing Generation Circuit and Second Waveform Shaping Circuit The AND circuit 12 of the second detection timing generation circuit 57
The logical product (AND) of the first up determination signal AUP (= "H") and the first rotation direction determination signal ARD (= "H") is obtained.
An “H” level signal is output to the OR circuit 123. Further, the AND circuit 122 outputs the first down determination signal ADN (=
"L") and an inverted signal of the first rotation direction determination signal ARD (=
A logical product (AND) of “L”) is obtained, and an “L” level signal is output to the OR circuit 123. Thereby, the OR circuit 1
23 outputs an "H" level signal to the AND circuit 138. At this point, the initialization signal SINIT
Is at the “H” level, and the AND circuit 138
An “H” level signal is output to the switch 69, the switch 69 is turned on, the second detection signal B is input to the third peak hold circuit 66, and the third peak hold circuit 6
6 holds the positive signal level (finally, the positive peak signal level) of the second detection signal B as the third peak hold signal SP3. On the other hand, the AND circuit 124
The logical product (AN) of the first down determination signal ADN (= “L” level) and the first rotation direction determination signal BRD (= “H” level)
D), and outputs an “L” level signal to the OR circuit 126. Also, the AND circuit 125 calculates the logical product (AND) of the first up determination signal BUP (= “H”) and the inverted signal (= “L”) of the first rotation direction determination signal ARD, and outputs the “L” level. The signal is output to the OR circuit 126. As a result, the OR circuit 126 converts the “L” level signal to AN
This is output to the D circuit 139.

Accordingly, the AND circuit 139 outputs an "L" level signal to the switch 70, the switch 64 is turned off, and the second peak hold circuit 61 outputs the negative signal level of the previous second detection signal B ( Finally, the negative peak signal level) is held as the fourth peak hold signal SP4. As a result, the second voltage dividing circuit 68 divides the voltage difference between the third peak hold signal SP3 and the fourth peak hold signal SP4, generates a second reference level signal SREF2, and outputs it to the comparator 71. On the other hand, the LED 46 of the second sensor unit 33 emits the second detection light L <b> 2 and irradiates the optical pattern 41. Accordingly, the photodiode 47 receives the second detection light L2 reflected by the optical pattern 41 and outputs the second detection signal B to the comparator 71. The comparator 71 outputs the second reference level signal SRE
The waveform of the second detection signal B is shaped based on F2, and the second waveform shaping signal SB is output to the second up / down determination circuit 54. The second up / down determination circuit 54 is configured based on the second waveform shaping signal SB. When the second waveform shaping signal SB rises, an "H" level second up determination signal BUP is output to the signal processing unit 59 and the second detection timing generation circuit 57, and when the second waveform shaping signal SB falls, ,
The “H” level second down determination signal BDN is output to the signal processing unit 59 and the second detection timing generation circuit 57.

On the other hand, the EXOR of the second normal / reverse determination circuit 55
The circuit 78 takes an exclusive OR (EXOR) of the first waveform shaping signal SA and the second waveform shaping signal SB, and performs an OR circuit 89
Are the second up determination signal BUP and the second down determination signal B
The logical sum (OR) of the DN is taken. Then, the D flip-flop circuit 90 outputs the data from the EXOR circuit 78 to the data terminal D.
And the output of the OR circuit 89 is supplied to the clock terminal / C
It is input to K, and the second rotation direction determination signal BRD is output to the signal processing unit 59 from the data output terminal Q. Accordingly, the signal processing unit 59 outputs the first up / down determination signal AU / D (= AUP and ADN), the first rotation direction determination signal ARD, and the second up / down determination signal BU / D (=
BUP and BDN) and the second rotation direction determination signal BRD.
The rotation angle relative to the first and second sensor units 32 and 32 is calculated. In this manner, as shown in FIG. 9, even when the amplitude of the first detection signal A is small and the amplitude of the second detection signal B is large, the operation of FIG.
As shown in FIG. 10C, the second reference level signal SREF2 is successively set to an appropriate signal level in accordance with the fluctuation of the second detection signal B, so that the ideal second waveform shaping shown in FIG. It is possible to obtain the second waveform shaping signal SB close to the signal, and to automatically increase the detection accuracy automatically without providing an adjustment step, and to reliably detect the rotation direction and the rotation angle of the rotating bezel 102. It becomes possible. The same effect can be obtained when the amplitude of the first detection signal A is large and the amplitude of the second detection signal B is small.

[1.1.2.6.2.3] Summary of Operation To summarize the above operation, the positive peak signal level of the first detection signal A is the second waveform shaping signal obtained by shaping the second detection signal B. The positive peak signal level of the second detection signal B is detected at the falling edge of SB, and is detected at the rising edge of the first waveform shaping signal SA obtained by shaping the waveform of the first detection signal A. Similarly, the negative peak signal level of the first detection signal A is detected when the second waveform shaping signal SB obtained by shaping the waveform of the second detection signal B rises, and the negative peak signal level of the second detection signal B becomes the negative peak signal level. The detection signal A is detected when the first waveform shaping signal SA obtained by shaping the waveform of the first detection signal A falls. The first detection signal A and the second detection signal
A first reference signal level SREF1 and a second reference signal level S of a comparator for performing waveform shaping based on the respective positive peak signal level and negative peak signal level of the detection signal B.
REF2 can be automatically set to an optimal value, and the influence of a change with time can be reduced without providing an adjustment step, and the rotation direction and the rotation angle of the rotating bezel 102 can be reliably detected.

[1.2] Next, the rotation direction detection and the rotation position detection operation will be described with reference to FIG.
This will be described with reference to FIG. [1.2.1] When rotating in the forward direction When the rotating bezel 102 is rotating in the forward direction, the second waveform shaping signal SB as shown by the reference numeral in FIG.
In both the case where the rotation direction is reversed just before the peak and the case where the rotation direction is reversed after exceeding the peak of the second waveform shaping signal SB as shown by the reference numeral in FIG. In addition, at the rising timing of the first waveform shaping signal SA, the second waveform shaping signal SB
= "L", and at the fall timing of the first waveform shaping signal SA, the second waveform shaping signal SB = "H". Similarly, when the rotating bezel 102 is rotating in the forward direction, at the rising timing of the second waveform shaping signal SB, the first waveform shaping signal SA = “H”, and the rising edge of the second waveform shaping signal SB. At the falling timing, the first waveform shaping signal SA becomes "L".

Accordingly, the signal processing unit 53, for example, as shown in FIG. 13, generates a rising timing of the first waveform shaping signal SA → a rising timing of the second waveform shaping signal SB → a falling timing of the first waveform shaping signal SA → Fall timing of second waveform shaping signal SB →
, The second waveform shaping signal SB = “L” → the first waveform shaping signal SA = “H” → the second waveform shaping signal SB = “H”. "→
If the first waveform shaping signal SA = “L” →...
It is determined that the rotating bezel 102 is rotating in the forward direction, the count up (or countdown) corresponding to the forward direction is performed, and the count value is added to the origin position to detect the rotating position of the rotating bezel 102. . In this case, the signal level is mutually referred to using both the signal transition timing of the first waveform shaping signal SA and the signal transition timing of the second waveform shaping signal SDIF. And 1 / the cycle of the second detection signal
There are eight periods. Therefore, the position can be detected with double accuracy as compared with the case where one sensor unit is used.

[1.2.2] When rotating in the reverse direction When the rotating bezel 102 is rotating in the reverse direction, as shown in FIG. 8, the rising of the first waveform shaping signal SA At the timing, the second waveform shaping signal SB =
It becomes "H", and at the falling timing of the first waveform shaping signal SA, the second waveform shaping signal SB becomes "L". Similarly, when the rotating bezel is rotating in the reverse direction, at the rising timing of the second waveform shaping signal SB, the first waveform shaping signal SA = “L”, and the falling edge of the second waveform shaping signal SB At the timing, the first waveform shaping signal SA becomes "H". Therefore, the signal processing unit 53, for example, as shown in FIG. 9, the rising timing of the first waveform shaping signal SA → the falling timing of the second waveform shaping signal SB → the falling timing of the first waveform shaping signal SA → the The first waveform shaping signal SA and the second waveform shaping signal SB at the rising timing of the two waveform shaping signals SB are observed, and the second waveform shaping signal SB is observed.
= “H” → first waveform shaping signal SA = “H” → second waveform shaping signal SB = “L” → first waveform shaping signal SA = “L” →.
If so, it is determined that the rotating bezel 102 is rotating in the reverse direction, the count up (or count down) corresponding to the reverse direction is performed, the count value is added to the origin position, and the rotation of the rotary bezel 102 is performed. The position will be detected. Also in this case, the signal level is mutually referred to using both the signal transition timing of the first waveform shaping signal SA and the signal transition timing of the second waveform shaping signal SDIF. This is １ ／ of the cycle of the signal and the second detection signal. Therefore, the position can be detected with double accuracy as compared with the case where one sensor unit is used.

[1.3] Information Input Method and Operation of Wrist Watch Information Processing Apparatus Next, an information input method and operation of the wrist watch information processing apparatus 100 will be described. First, the user adjusts the rotating bezel 102 to a predetermined origin position. In the present embodiment, the origin position is set to the state shown in FIG. 2, that is, the state where “A” is indicated by the instruction mark 110. In this state, the user presses the origin switch 108, whereby the wristwatch-type information processing apparatus 100 enters an information input state, and the first sensor unit 32 and the second sensor unit 33 detect the rotation angle and the rotation direction of the rotating bezel 102. To start. Then, when the user wants to input information to be input, for example, the character “f”, FIG.
As shown in FIG.
Turns the rotating bezel counterclockwise to the position indicated by the instruction mark 110. At this time, the pulse number detection sensor unit 32 detects the rotation angle θ of the rotating bezel 102, and the second sensor unit 33 detects the rotation direction of the rotating bezel 102. Based on the rotation angle and the rotation direction detected in this way, the input information “f” is
And is displayed on the display unit 104. When the confirm switch 105 is pressed in this state, the character "f" is decided, and a state of waiting for input of the next information is entered. When the delete switch 106 is pressed, the character "" is deleted, and the input wait state is entered. Also, when the cloud spot switch 107 is pressed,
“Ga” is displayed on the display unit 104.

[1.4] Effects The information processing apparatus according to the present invention has a simple configuration even when it is possible to input a large amount of information such as information such as characters and command information such as mode selection, so that the information processing apparatus is small in size. Conversion is easy.
Therefore, it is possible to use a wristwatch type as described above. In addition, when inputting information by rotating the rotating bezel 102 as described above, the wristwatch-type information processing apparatus 100 performs both the signal transition timing of the first waveform shaping signal SA and the signal transition timing of the second waveform shaping signal SB. , The signal level is referred to each other, so that the position detection accuracy can be set to 1/8 of the period of the first detection signal and the second detection signal, and the rotational position of the rotating bezel 102 can be accurately determined. Is detected, and information can be input reliably. Further, since the first waveform shaping signal SA and the second waveform shaping signal SB associated with each other are referred to each other, it is possible to reduce the influence of the change over time of the sensor unit.

[2] Modified Example [2.1] First Modified Example In the above embodiment, a reflection type sensor was used as the first sensor unit 32 and the second sensor unit 33. By forming the optical pattern 41 with an absorption area (non-transmission area) and a transmission area by using a light transmission member, the same effect can be obtained even if a transmission type sensor unit is used. [2.2] Second Modification The rotation detecting device according to the present invention is not limited to the wristwatch-type information processing device described above, and may be applied to other types of information processing devices such as a mobile phone. It is possible. In this case, the rotating part is not limited to the rotating bezel, but may be a disk, a cylinder,
Other shapes such as hemispheres can be used.

[0066]

According to the present invention, a first reference level signal is generated based on a first peak hold signal and a second peak hold signal, and the first detection signal is compared with the first reference level signal. The waveform of the first detection signal is shaped and output as a waveform shaped signal, and based on the third peak hold signal and the fourth peak hold signal,
A second reference level signal is generated, and the second detection signal is compared with the second reference level signal to perform waveform shaping of the second detection signal and output as a second waveform shaping signal. The reference signal level and the second reference signal level can be automatically set to optimal values, the influence of aging can be reduced without providing an adjustment step, and the rotation direction and the rotation angle can be reliably detected. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a front view of a wristwatch-type information processing apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing a state in which a rotating bezel is removed from the wristwatch-type information processing apparatus of FIG. 1;

FIG. 3 is a view taken along line IV-IV in FIG. 1;

FIG. 4 is a diagram showing a lower surface of a rotating bezel.

FIG. 5 is a diagram illustrating a relationship between an optical pattern formed on a rotating bezel, a first detection signal, and a second detection signal.

FIG. 6 is a functional configuration block diagram for generating an input information signal of the wristwatch-type information processing apparatus.

FIG. 7 is a schematic configuration block diagram of a sensor unit and an information processing unit.

FIG. 8 is a specific configuration block diagram of a sensor unit and an information processing unit.

FIG. 9 is a diagram illustrating a setting state of a reference signal level (part 1).

FIG. 10 is a diagram illustrating a setting state of a reference signal level (part 2).

FIG. 11 is a diagram (part 1) for explaining the operation of the embodiment;

FIG. 12 is a diagram (part 2) for explaining the operation of the embodiment;

FIG. 13 is a diagram (part 3) for explaining the operation of the embodiment.

14 is a diagram showing a state in which the rotating bezel of the wristwatch-type information processing device shown in FIG. 2 is rotated counterclockwise by θ [゜].

FIG. 15 is a perspective view showing a wristwatch equipped with a conventional rotating bezel.

[Explanation of symbols]

 32 first sensor unit 33 second sensor unit 41 optical pattern 41a absorption area 41b reflection area 44, 46 LED 45, 47 photodiode 50 first waveform shaping circuit 51 first up / down determination Circuit 52: First normal / reverse determination circuit 53: Second waveform shaping circuit 54: Second up / down determination circuit 55: Second normal / reverse determination circuit 56: First detection timing generation circuit 57: Second detection timing generation circuit Reference numeral 100: wristwatch-type information processing device 102: rotating bezel 111: information processing unit 112: information table

Claims (18)

[Claims] 1. A first peak hold means for holding a positive peak signal level of an input signal at a predetermined first timing as a first peak hold signal; and a negative peak signal level of the input signal at a predetermined second timing. Second peak hold means for holding as a two peak hold signal; reference level signal generation means for generating and outputting a reference level signal based on the first peak hold signal and the second peak hold signal; And a waveform shaping means for performing waveform shaping of the input signal by comparing with the reference level signal and outputting the waveform as a waveform shaping signal. 2. A first peak detector for holding a positive peak signal level of an input signal at a predetermined first timing as a first peak hold signal; A second peak detector that holds the signal as a peak hold signal; a reference level signal generation circuit that generates and outputs a reference level signal based on the first peak hold signal and the second peak hold signal; A waveform shaping circuit, comprising: a comparator for shaping the waveform of the input signal by comparing the input signal with a level signal and outputting the shaped signal as a waveform shaping signal. 3. A reflection member on which a predetermined optical pattern having an absorption area and a reflection area is formed, and a first detection light is applied to the reflection member, and the first detection light reflected by the reflection member is reflected by the reflection member. A first detection unit that receives light and outputs a first detection signal corresponding to the optical pattern; a first detection unit that is arranged at a predetermined angle away from the first detection unit and a rotation center; And a second detection means for receiving the reflected second detection light and outputting a second detection signal corresponding to the optical pattern; and performing the first detection at a signal level transition timing of a second waveform shaping signal. The first to determine and hold the peak signal level of the signal
Means for determining and holding a peak signal level of the second detection signal at a signal level transition timing of the first waveform shaping signal;
Peak determining and holding means; first waveform shaping means for performing waveform shaping of the first detection signal based on the peak signal level of the first detection signal and outputting the same as the first waveform shaping signal; and the second detection signal And a second waveform shaping means for shaping the waveform of the second detection signal based on the peak signal level of the second and outputting as the second waveform shaping signal. 4. The rotation detection device according to claim 3, wherein the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data and the second waveform. The first waveform shaping signal is sampled at a signal level transition timing of the shaping signal to obtain second sampling data, and the first detection means of the reflection member and A signal processing means for calculating a rotation direction and a rotation angle relative to the second detection means. 5. The rotation detecting device according to claim 4, wherein the signal processing unit is configured to determine whether a relative rotation direction of the reflection member with respect to the first detection unit and the second detection unit is a normal rotation direction or a reverse rotation direction. And a normal rotation / reverse rotation discriminating means for outputting a normal rotation / reverse rotation discrimination signal, wherein the first peak confirmation holding means includes a signal level transition timing of the second waveform shaping signal and the normal rotation / reverse rotation discrimination. First positive / negative timing determining means for determining whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the signal and outputting a first positive / negative timing determination signal; When the first positive / negative timing determination signal corresponds to a positive peak hold timing, the second waveform shaping signal corresponding to the first positive / negative timing determination signal First peak hold means for holding the signal level of the first detection signal as a first peak hold signal at the signal level transition timing, and when the first positive / negative timing discrimination signal corresponds to a negative peak hold timing, Second peak hold means for holding the signal level of the first detection signal as a second peak hold signal at a signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal. The second peak confirmation holding circuit is configured to change a signal level transition timing of the first waveform shaping signal to a positive peak hold timing based on the signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. Or a negative peak hold timing, and outputs a second positive / negative timing determination signal. When the second positive / negative timing determination signal corresponds to a positive peak hold timing, the signal level transition timing of the first waveform shaping signal corresponding to the second positive / negative timing determination signal; A third peak hold means for holding a signal level of the second detection signal as a third peak hold signal; and a second positive / negative timing when the second positive / negative timing discrimination signal corresponds to a negative peak hold timing. And a fourth peak holding means for holding a signal level of the second detection signal as a fourth peak hold signal at a signal level transition timing of the first waveform shaping signal corresponding to the discrimination signal. Detection device. 6. A light transmitting member on which a predetermined optical pattern having an absorption area and a transmission area is formed, and a first detection light is applied to the light transmitting member, and the first detection transmitted through the light transmitting member. A first detection unit that receives light and outputs a first detection signal corresponding to the optical pattern; a first detection unit that is disposed at a predetermined angle from the rotation center with respect to the first detection unit; Second detection means for irradiating the second detection light, receiving the second detection light transmitted through the light transmitting member, and outputting a second detection signal corresponding to the optical pattern; signal level of the second waveform shaping signal A first signal that determines and holds the peak signal level of the first detection signal at the transition timing
Means for determining and holding a peak signal level of the second detection signal at a signal level transition timing of the first waveform shaping signal;
Peak determining and holding means; first waveform shaping means for performing waveform shaping of the first detection signal based on the peak signal level of the first detection signal and outputting the same as the first waveform shaping signal; and the second detection signal And a second waveform shaping means for shaping the waveform of the second detection signal based on the peak signal level of the second and outputting as the second waveform shaping signal. 7. The rotation detection device according to claim 6, wherein the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data and the second waveform. The first waveform shaping signal is sampled at the signal level transition timing of the shaping signal to obtain second sampling data, and the first detecting means of the light transmitting member is based on the first sampling data and the second sampling data. And a signal processing means for calculating a rotation direction and a rotation angle relative to the second detection means. 8. The rotation detection device according to claim 7, wherein the signal processing unit is configured to rotate the light transmitting member relative to the first detection unit and the second detection unit in a normal rotation direction or a reverse rotation direction. And a forward / reverse discrimination means for outputting a forward / reverse discrimination signal, wherein the first peak confirmation holding means comprises a signal level transition timing of the second waveform shaping signal and the forward / reverse rotation. A first positive / negative timing determining means for determining whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing based on the determination signal and outputting a first positive / negative timing determination signal; And when the first positive / negative timing discrimination signal corresponds to a positive peak hold timing, the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal. First peak hold means for holding the signal level of the first detection signal as a first peak hold signal at the signal level transition timing of the signal, and when the first positive / negative timing discrimination signal corresponds to a negative peak hold timing. Second peak hold means for holding the signal level of the first detection signal as a second peak hold signal at a signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal. The second peak determination holding circuit is configured to hold the signal level transition timing of the first waveform shaping signal in a positive peak based on the signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. A second positive / negative signal for determining whether the timing is a negative peak hold timing and outputting a second positive / negative timing determination signal When the second positive / negative timing discrimination signal corresponds to a positive peak hold timing, the signal level transition timing of the first waveform shaping signal corresponding to the second positive / negative timing discrimination signal; A third peak hold means for holding a signal level of the second detection signal as a third peak hold signal; and a second positive / negative timing when the second positive / negative timing discrimination signal corresponds to a negative peak hold timing. And a fourth peak holding means for holding a signal level of the second detection signal as a fourth peak hold signal at a signal level transition timing of the first waveform shaping signal corresponding to the discrimination signal. Detection device. 9. The rotation detecting device according to claim 5, wherein the first waveform shaping means determines a voltage difference between the first peak hold signal and the second peak hold signal by a predetermined first signal.
The first waveform is divided by a voltage dividing ratio to generate the first reference level signal, and the first detection signal is compared with the first reference level signal to perform waveform shaping. The voltage difference between the hold signal and the fourth peak hold signal is determined by a predetermined second
A rotation detection device, wherein the second detection signal is divided by a division ratio to generate the second reference level signal, and waveform shaping is performed by comparing the second detection signal with the second reference level signal. 10. The rotation detection device according to claim 3, wherein the output is provided when the reflection member is rotated relatively to the first detection unit and the second detection unit. Said first
A rotation detection device, wherein a separation angle between the first detection means and the second detection means is set such that a phase of a detection signal and a phase of the second detection signal are shifted by 1/4 wavelength. 11. The rotation detection device according to claim 3, wherein the optical pattern includes the absorption region that absorbs the first detection light and the second detection light and the first detection. The light and the reflection area that reflects the second detection light are alternately formed such that the angle θ2 about the rotation center is 360 / n [゜] (n is an even number), and the first detection Wherein the angle θ1 formed by a line connecting each of the means or the second detection means and the rotation center is θ1 = (θ2 × m) + θ2 / 2 (where m is an integer). Detection device. 12. The rotation detecting device according to claim 3, wherein the reflection member is formed in an annular rotating bezel, and wherein the first detecting means and the second detecting means are provided. Is a rotation detection device having a band portion that can be wound around a user's wrist, and formed on a wristwatch-type main body to which the rotating bezel is rotatably attached. 13. A reflection member on which a predetermined optical pattern having an absorption area and a reflection area is formed, and a first detection light is applied to the reflection member, and the first detection light reflected by the reflection member is reflected by the reflection member. A first sensor that receives light and outputs a first detection signal corresponding to the optical pattern; a first sensor that is disposed at a predetermined angle from the rotation center of the first sensor and irradiates the reflection member with second detection light A second sensor that receives the reflected second detection light and outputs a second detection signal corresponding to the optical pattern; and a peak of the first detection signal at a signal level transition timing of the second waveform shaping signal. First to determine and hold signal level
A peak determination holding circuit, which determines and holds the peak signal level of the second detection signal at the signal level transition timing of the first waveform shaping signal;
A peak confirmation holding circuit; a first comparator that shapes the waveform of the first detection signal based on a peak signal level of the first detection signal and outputs the resultant as the first waveform shaping signal; and a peak of the second detection signal. A second comparator for shaping the waveform of the second detection signal based on a signal level and outputting the shaped signal as the second waveform shaping signal. 14. The rotation detection device according to claim 13, wherein the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data, and the second waveform. The first waveform shaping signal is sampled at the signal level transition timing of the shaping signal to obtain second sampling data, and the first sensor and the first sensor of the reflecting member are formed based on the first sampling data and the second sampling data. A signal processing circuit for calculating a rotation direction and a rotation angle relative to the second sensor. 15. The rotation detection device according to claim 14, wherein the signal processing circuit determines whether a rotation direction of the reflection member relative to the first sensor and the second sensor is a forward rotation direction or a reverse rotation direction. And a forward / reverse determination circuit for outputting a forward / reverse determination signal, wherein the first peak determination holding circuit outputs a signal level transition timing of the second waveform shaping signal and the forward / reverse determination signal. A first positive / negative timing discriminating circuit for discriminating whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing and outputting a first positive / negative timing discrimination signal, When the first positive / negative timing discrimination signal corresponds to the positive peak hold timing, the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal A first peak hold circuit that holds the signal level of the first detection signal as a first peak hold signal at the signal level transition timing, and when the first positive / negative timing discrimination signal corresponds to a negative peak hold timing, A second peak hold circuit that holds a signal level of the first detection signal as a second peak hold signal at a signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing determination signal. The second peak confirmation holding circuit is configured to change a signal level transition timing of the first waveform shaping signal to a positive peak hold timing based on the signal level transition timing of the first waveform shaping signal and the forward / reverse determination signal. Or a negative peak hold timing, and outputs a second positive / negative timing determination signal. When the second positive / negative timing discrimination signal corresponds to a positive peak hold timing, the signal level transition timing of the first waveform shaping signal corresponding to the second positive / negative timing discrimination signal. A third peak hold circuit for holding a signal level of the second detection signal as a third peak hold signal; and a second positive / negative timing when the second positive / negative timing discrimination signal corresponds to a negative peak hold timing. A fourth peak hold circuit that holds a signal level of the second detection signal as a fourth peak hold signal at a signal level transition timing of the first waveform shaping signal corresponding to the determination signal. Detection device. 16. A method of irradiating a reflection member on which a predetermined optical pattern having an absorption region and a reflection region is formed with first detection light, receiving the first detection light reflected by the reflection member, and performing the optical detection. A first sensor that outputs a first detection signal corresponding to the pattern, is disposed at a predetermined angle away from the rotation center of the first sensor, and irradiates the reflection member with second detection light to be reflected. A second sensor that receives the second detection light and outputs a second detection signal corresponding to the optical pattern. The rotation detection method of the rotation detection device, wherein the signal level transition timing of the second waveform shaping signal is A first signal level for determining and holding the peak signal level of the first detection signal
A peak determination and holding step; and a second step of determining and holding the peak signal level of the second detection signal at a signal level transition timing of the first waveform shaping signal.
A peak determination and holding step; a first waveform shaping step of shaping the waveform of the first detection signal based on a peak signal level of the first detection signal and outputting the waveform as the first waveform shaping signal; A second waveform shaping step of shaping the waveform of the second detection signal based on the peak signal level of the second and outputting as the second waveform shaping signal. 17. The rotation detection method according to claim 16, wherein the second waveform shaping signal is sampled at a signal level transition timing of the first waveform shaping signal to obtain first sampling data and the second waveform. The first waveform shaping signal is sampled at the signal level transition timing of the shaping signal to obtain second sampling data, and the first sensor and the first sensor of the reflecting member are formed based on the first sampling data and the second sampling data. A signal processing step of calculating a rotation direction and a rotation angle relative to the second sensor. 18. The rotation detection method according to claim 17, wherein the signal processing step determines whether a relative rotation direction of the reflection member with respect to the first sensor and the second sensor is a normal rotation direction or a reverse rotation direction. And a forward / reverse determination step of outputting a forward / reverse determination signal. The first peak confirmation holding step includes a step of determining a signal level transition timing of the second waveform shaping signal and the forward / reverse determination signal. A first positive / negative timing determining step of determining whether the signal level transition timing of the second waveform shaping signal is a positive peak hold timing or a negative peak hold timing and outputting a first positive / negative timing determination signal, When the first positive / negative timing discrimination signal corresponds to the positive peak hold timing, the second waveform shaping signal corresponding to the first positive / negative timing discrimination signal A first peak hold step of holding a signal level of the first detection signal as a first peak hold signal at the signal level transition timing, and when the first positive / negative timing discrimination signal corresponds to a negative peak hold timing, A second peak hold step of holding a signal level of the first detection signal as a second peak hold signal at a signal level transition timing of the second waveform shaping signal corresponding to the first positive / negative timing determination signal. The second peak confirmation holding step includes the step of, based on the signal level transition timing of the first waveform shaping signal and the forward / reverse discrimination signal, changing the signal level transition timing of the first waveform shaping signal to a positive peak hold timing. A second positive / negative timer for determining whether the current timing is a negative peak hold timing and outputting a second positive / negative timing determination signal In the case where the second positive / negative timing determination signal corresponds to a positive peak hold timing, the signal level transition timing of the first waveform shaping signal corresponding to the second positive / negative timing determination signal; A third peak hold step of holding the signal level of the second detection signal as a third peak hold signal; and, when the second positive / negative timing discrimination signal corresponds to a negative peak hold timing, the second positive / negative timing A fourth peak hold step of holding a signal level of the second detection signal as a fourth peak hold signal at a signal level transition timing of the first waveform shaping signal corresponding to the determination signal. Detection method.