JPH07199352A - Picture projector - Google Patents

Abstract

PURPOSE:To provide a picture projector such as an OHP device by which efficient presentation is executed. CONSTITUTION:A sheet feeder 30 and a remote control transmitter are attached to the OHP device 10. The sheet feeder 30 positions a sheet on a platen glass 12 by holding the sheet between a carrying film 36 and a pressing film 38. A light receiving unit receiving an infrared signal transmitted from the remote control transmitter is installed in the sheet feeder 30, and rotates a photodetector in order to receive light. Then, a machine body number setting switch 68 is installed in the feeder 30, so that only the OHP device 10 specified by the switch 68 is actuated by the remote control transmitter. Furthermore, the timer function of a timer setting display part 69 is operated from the remote control transmitter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image projection device controlled by remote control.

[0002]

2. Description of the Related Art Conventionally, as an image projection device for projecting an image formed on a transparent film by transmitted light or reflected light, there is, for example, an overhead projector device (hereinafter referred to as OHP device). When giving a presentation using an OHP device, the presenter arranges OHP sheets in the order of explanation in advance, and puts the sheet on the platen glass of the OHP device as the presentation progresses. I used to remove it from the platen glass.

[0003]

However, in such a conventional OHP device, there is a presenter near the OHP device, and the following problems occur because the presenter exchanges sheets one by one. It was The image of the sheet is magnified and projected on the screen by the OHP device, but it is OH for the presenter standing by the screen and explaining.
Since the P device is placed at a distant position, it is necessary to approach the OHP device when exchanging the sheet, and an extra operation is included, so that an efficient presentation cannot be performed.

Although it is possible to allocate personnel to replace the seat, it is necessary to carry out extra operations such as signaling and replacement, and it has been necessary to allocate such personnel in vain. Also, in order to answer questions from the audience after the presentation, it took time to find the necessary sheet among the finished sheets, and it was not possible to effectively utilize the limited presentation time. . Furthermore, when it was desired to check the remaining time during the presentation, or when considering the time allocation of the presentation, a separate clock had to be prepared in advance to remember the start time of the presentation. Further, when a plurality of OHP devices are arranged and selectively used, the presenter has to go back and forth between those OHP devices, and an efficient presentation cannot be performed.

Therefore, in order to solve these problems at a stretch, the present invention aims to provide an image projection apparatus such as an OHP apparatus capable of giving an efficient presentation.

[0006]

In order to achieve the above object, the image projection apparatus of the present invention is an image projection means for projecting an image of a sheet positioned at a predetermined position, and conveys the sheet to the predetermined position. A sheet conveying unit and a remote control unit for controlling the sheet conveying unit by remote control are provided.

Further, the image projecting apparatus of the present invention is such that an image projecting means for projecting an image of a sheet positioned at a predetermined position, a sheet conveying means for conveying the sheet to the predetermined position, and a remote operation of the sheet conveying means. Remote control means for controlling by the above, time setting means for setting the time by the remote control means, and notification means for notifying the arrival of the set time.

Further, the image projecting device of the present invention is such that an image projecting means for projecting an image of a sheet positioned at a predetermined position, a sheet conveying means for conveying the sheet to the predetermined position, and an optical signal for the sheet conveying means. Remote control means for controlling by, the remote control means is provided, the light emitting means for emitting the optical signal, and the sheet conveying means,
The light-receiving means has a limited direction for receiving the optical signal, and the rotation driving means for rotating the light-receiving means.

Furthermore, the image projecting apparatus of the present invention further comprises an image projecting means for projecting an image of a sheet positioned at a predetermined location, a sheet transporting means for transporting the sheet to the predetermined location, and a remote control for the sheet transporting means. Remote control means for controlling by operation, the remote control means comprises an identification number transmitting means for transmitting an identification number, the sheet conveying means,
An identification number setting means for setting the identification number, and a determination means for determining whether the set identification number and the identification number transmitted from the identification number transmitting means coincide with each other.

[0010]

According to the image projection apparatus of the present invention, the image of the sheet positioned at the predetermined position is projected by the image projection means, and the sheet is conveyed to the predetermined position by the sheet conveying means.
The sheet control means is controlled by remote control by remote control means. Further, the image projection apparatus of the present invention projects an image of a sheet positioned at a predetermined location by the image projection means, conveys the sheet to the predetermined location by the sheet conveying means, and remotely operates the sheet conveying means by the remote control means. When controlling by, the time setting means is set by the remote control means, and the notification means notifies the arrival of the set time. Further, in the image projection apparatus of the present invention, the light emitting means provided in the remote control means emits an optical signal, and the light receiving means provided in the sheet conveying means is limited in the direction in which the optical signal is received. The light receiving means is turned. Furthermore, in the image projection apparatus of the present invention, the identification number is transmitted by the identification number transmitting means, the identification number is set by the identification number setting means provided in the sheet conveying means, and the identification number and the set identification number are identified by the determining means. The coincidence with the identification number transmitted from the number transmitting means is determined.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the image projection apparatus of the present invention will be described with reference to the drawings.

[Structure of OHP Device 10] FIG. 1 is a schematic view showing the structure of the sheet feeder 30 mounted on the OHP device 10. First, the configuration of the OHP device 10 will be briefly described. The OHP device 10 has an "L" -shaped arm 10b standing upright from one of the four corners of the main body 10a.
A lens 10c is provided at the tip of b, and an opening / closing reflective mirror 10d is provided above it. A platen glass 12 is fitted on the upper surface of the main body 10a, and a halogen lamp (not shown) is attached as a light source inside the platen glass 12. The light emitted from this halogen lamp is the lens 1
The sheet 1 placed on the platen glass 12 is converged at 0c and reflected and diffused at the reflection mirror 10d.
The image of No. 5 is enlarged and projected on the screen at a position away from the main body 10a.

[Structure of Sheet Feeder 30] The sheet feeder 30 is mounted on the upper portion of the main body 10a of the OHP device 10 and continuously conveys the sheet 15 on the platen glass 12, and the film is formed on both sides of the side plates 33a and 33b. It has a feeding section 40 and a film winding section 50. In the film winding unit 50, the feed roll 4 of the film feeding unit 40
The transport film 36 and the pressing film 38, which are integrally wound around 1, are wound by the winding roll 57 and the winding roll 59, respectively. The transport film 36 and the winding film 38 move bidirectionally between the film feeding unit 40 and the film winding unit 50. Further, the sheet 15 is set in a state of being sandwiched between the transport film 36 and the pressing film 38, and in this state, the sheet 15 moves and is positioned on the platen glass 12. Therefore, the transport film 36 and the pressing film 38 must be made of a light-transmissive material, and polyethylene terephthalate (PET film) is used in this embodiment.
Further, the thickness of the pressing film 38 is thinner than that of the transport film 36. A tensioner 43 and paper feed rollers 51 and 52 are provided between the feed roll 41 and the take-up rolls 57 and 59. Tensioner 43
Holds the transport film 36 and the pressing film 38. The paper feed roller 52 is biased toward the paper feed roller 51 by a spring (not shown).

Further, the sheet 1 is provided in the film winding section 50.
A tray 54 on which the 5 is placed is provided. The tray 54 is swingable around a rotation shaft 57a of a winding roll 57 by a cam 54a and a cam follower 54b provided in the middle. When the cam 54a rotates in the direction of arrow c in conjunction with a lever (not shown), the scoop portion 54e on the front end side of the tray 54 presses the transport film 36 once and then scoops the sheet 15 placed on the transport film 36. Take action. Further, a "F" -shaped member 54f is swingably provided on the front side of the tray 54, and a transmissive sheet sensor 54c arranged on one side detects the displacement of swinging of the member. Thus, it is determined whether or not the sheet 15 is placed on the tray 54. Behind the tray 54 is a transmissive sheet R sensor 5
6 is provided to detect whether the sheet 15 is in the vertical direction or the horizontal direction.

In the film winding section 50, in addition, a sheet position sensor 64 which is a transmission type optical sensor, a model number setting switch 68 which is a rotary switch for setting the machine number of the OHP device, and a remote control transmitter which will be described later. A remote control receiver 67 for receiving an infrared signal emitted from 201, a timer setting display unit 69 to which a time setting switch 122b and a display unit 122a are attached to notify the setting of the announcement time and the remaining time are provided. A pass changeover switch 127 for changing over the sheet 15 in either the winding direction or the feeding direction (pass) is provided in conjunction with the lever (see FIG. 4).

[Drive System of Sheet Feeder 30] FIG. 2 is a sectional view of the sheet feeder 30 as seen from the direction of arrow A in FIG. As described above, the film take-up unit 50 takes up the take-up roll 57 for taking up the transport film 36, the take-up roll 59 for taking up the pressing film 38, the paper feed rolls 51 and 5.
2. A winding motor 62 and a transmission mechanism 65 are provided. The winding motor 62 is composed of a stepping motor, and its output shaft has a pulley 57c of the winding roll 57.
A gear 63 that meshes with is attached. Pulley 57
c is press-fitted into one end of the roll cylinder 57d, and the pulley 57b is press-fitted into the other end of the roll cylinder 57d. As the central axis of the roll cylinder 57d, the roll shaft 57a is the pulley 57.
It is fixed to the side plates 33a and 33b by pivotally supporting b and 57c. With such a structure, the roll cylinder 57d rotates as the winding motor 62 rotates, and winds the transport film 36 around it.

The transmission mechanism 65 includes a transmission shaft 75 and a pulley 75.
A combination of a and a one-way gear 76, and a pulley 75a pivotally supported by the transmission shaft 75 is belted between the pulley 75a pivotally supported by the output shaft of the winding motor 62. As a result, the power of the winding motor 62 is transmitted to the one-way gear 76 pivotally supported by the transmission shaft 75. Further, a torque limiter 59f is attached to a gear 59e pivotally supported by a roll shaft 59a, which is the central axis of the roll cylinder 59. The gear 59e meshes with the one-way gear 76 to output the output of the winding motor 62. It is transmitted to the roll shaft 59a. Pulleys 59b and 59c are press-fitted into the roll cylinder 59d similarly to the roll cylinder 57d. Roll axis 5
9a pivotally supports pulleys 59b and 59c, and side plates 33a and 3a.
It is rotatably attached to 3b. With this structure, when the rotation of the winding motor 62 is also transmitted to the roll cylinder 59d, the roll cylinder 59d rotates and the pressing film 38 is rotated.
Take up. Here, since the reduction ratio of the transmission shaft 75 is set so that the peripheral speed of the roll cylinder 59d is higher than the peripheral speed of the roll 57d, the pressing film 38 and the transport film 36 are wound and sent out without being displaced from each other. it can. Further, the brake plate 64 urged by the brake spring 64a comes into surface contact with the pulley 59c, and the frictional force prevents the pressing film 38 once wound from sagging. Similarly, the roll shaft 51a of the paper feed roll 51 is fixed to the side plates 33a and 33b,
The pulleys 51b and 51c are pivotally supported by the roll shaft 51a.
Pulleys 51b and 51c are press-fitted on both sides of the roll cylinder 51d.

On the other hand, the film feeding section 40 includes the feeding roll 41, the tensioner 43, the feeding motor 42 and the like as described above. A roll shaft 41a, which is a central shaft of the feed roll 41, is fixed to side plates 33a and 33b, and pulleys 41b and 41c are pivotally supported by the roll shaft 41a. The pulleys 41b and 41c are press-fitted inside the roll cylinder 41d. A gear 41e is formed on the back of the pulley 41c and meshes with a gear 44 attached to the output shaft of the feed motor 42. With such a structure, the roll cylinder 41d rotates as the feed motor 42 rotates, and the transport film 36 and the pressing film 38 can be fed. The tensioner 43 includes a roll shaft 43a fixed to the side plates 33a and 33b and a pulley 4 supported by the roll shaft 43a.
3b and 43c. The pulleys 43b and 43c are press-fitted inside the roll cylinder 43d, and the roll cylinder 43d applies tension to the transport film 36 and the pressing film 38.

FIG. 3 is a plan view showing the sheet 15 positioned on the platen glass 12. Sheet feeder 30
A frame mark 71 is attached to each of the frames (corresponding to one sheet 15) on the transport film 36 sent by. The frame mark 71 is formed of a material that blocks light. When the sheet position sensor 64 detects when the frame mark 71 reaches the detection position of the sheet position sensor 64, the control circuit 110, which will be described later, causes the winding motor to rotate. 6
2 or the drive of the feed motor 42 is stopped, and the transport of the transport film 36 and the pressing film 38 is stopped.
The positioning of the sheet 15 sandwiched between the transport film 36 and the pressing film 38 on the platen glass 12 is completed by the detection of the frame mark 71. The width 15a of the sheet 15 is smaller than the width 36a of the transport film 36. This is because the pulleys 41b and 41c are pressed into both ends of the roll cylinder 41d due to the deviation of the sheet 15 when the sheet 15 is wound around the feed roll 41.
This is to prevent collision with. In addition, sheet 1
The central portion of 5 is set so as to be positioned at the central portion of the platen glass 12, not to mention that the central portion of the sheet 15 is to be projected. This is because the basic principle of enlarging and projecting the formed image on the screen copes with the phenomenon that the periphery of the screen becomes relatively dark and the image is difficult to be clearly projected.

[Structure of Control Circuit] FIG. 4 shows the structure of the control circuit 110 for driving the sheet feeder 30. The control circuit 110 is built in the sheet feeder 30.
The signal line 113 is also connected from the control circuit 110 to the OHP drive circuit 170 built in the main body 10a of the P device 10. The control circuit 110 is a well-known CPU, ROM, R
It is mainly composed of a one-chip microcomputer 115 including an AM and an input / output port. The one-chip microcomputer 115 includes a remote control receiving circuit 118 that receives an infrared signal from a remote control transmitter 201, which will be described later, a time setting switch 122b that sets the time of the timer setting display unit 69 described above, and a model number that sets a model number. The position of the setting switch 68, the sheet sensor 54c that detects the presence or absence of the sheet 15 placed on the tray 54, the sheet R sensor 56 that detects the vertical or horizontal direction of the sheet, and the position of the frame mark 71 of the transport film 36 are detected. The sheet 15 is attached to either the sheet position sensor 64 or the sheet feeding and discharging.
The path changeover switch 127 for changing over the path is connected as an input means. As shown in FIG. 5, the timer setting display section 69 includes the display section 1 in addition to the time setting switch 122b.
22a, a count start key 122c, a stop key 122d, a timer ON / OFF key 122e, and a buzzer 122f are provided. Timer ON / OFF
The key 122e sets whether or not the timer function is used, and ON / OFF is switched each time it is pressed.
The time setting switch 122b can be set up to 99 minutes 59 seconds for setting the presentation time. When the count start key 122c is pressed, the countdown starts and the remaining time is displayed on the display unit 122a. When the count stop key 122d is pressed midway, the count is temporarily stopped, and when the count start key 122c is pressed again, the countdown is restarted.

As shown in FIG. 6, the remote control receiving circuit 118 includes a light receiving unit 121, a buffer 123, and a processing circuit 1.
25 and a clock circuit 128. When an infrared signal output from a remote control transmitter 201 described later is received by a plurality of light receiving units 121, it is converted into a serial electric signal. The converted electrical signal is the buffer 123
Is input as serial data to the processing circuit 125 via. The processing circuit 125 takes in serial data according to the timing clock from the clock circuit 128, converts the taken serial data into parallel data, and outputs the parallel data from the output port 126.
The light receiving unit 121 includes a photodiode 141, an amplifier 142, a limiter 143, a band pass filter 144,
The demodulator 145, the integrator 146, and the comparator 147 are provided. The photodiode 141 converts the infrared signal into an electric signal, and the amplifier 142 amplifies the electric signal. The amplitude of the amplified electric signal is limited by the limiter 143, only the signal component of a specific frequency is extracted through the bandpass filter 144, and then demodulated by the demodulator 145. When the waveform of the demodulated signal is shaped by the integrator 146, the comparator 147 outputs only a signal of a certain level or higher.

Light receiving unit 121 having such a configuration
Are incorporated in three positions of the remote control receiver 67, and the light receiving unit drive circuit 151 for driving the motor 158 of the light receiving unit 121 is connected to the one-chip microcomputer 115. FIG. 8 is a perspective view showing the mechanical configuration of the light receiving unit 121. The light receiving portion 153 is attached to the circular substrate 152 attached to the central axis of the rotatable cylindrical pointing rod 151, and the signal line 155 connected to the connector 154 of the light receiving portion 153 passes through the inside of the pointing rod 151. It is input to the remote control receiving circuit 118 described above. Pointer 15
1, the pulley 156 is pivotally supported, and when a certain torque is applied to the pulley 156 when the indicator rod 151 cannot rotate, the pulley 156 slips from the indicator rod 151 and only the pulley 156 rotates. .
A belt 157 is wound around the pulley 156 and the output shaft of the motor 158, and the pulley 156 rotates with the motor 158. A stopper 159 is attached to a fixing member (not shown) on the surface of the circular substrate 152, and the stopper 159 allows the circular substrate 1 to move.
Only one forward / reverse rotation of 52 is permitted.

Further, constant current circuits 131 and 133 for driving the feed motor 42 and the winding motor 62, respectively, are connected to the one-chip microcomputer 115 as output means. The feed motor 42 and the winding motor 62 are stepping motors as described above, and are driven by the four-phase pulse signals A, A *, B, B *. That is, these four-phase pulse signals are cyclically (A → A * → B → B
By shortening the output cycle to *, the rotation of the stepping motor becomes faster and the reverse cyclic (A
The output of (* → A → B * → B) causes the stepping motor to rotate in the reverse direction. Further, the display unit 122a provided in the timer setting display unit 69 and the voice output unit 122h of the buzzer 122f serve as output means for the one-chip microcomputer 115.
Connected to.

In addition, the one-chip microcomputer 115 has O
The HP drive circuit 170 is connected. The OHP drive circuit 170 controls ON / OFF of the halogen lamp in the main body 10a of the OHP device, adjustment of illumination intensity, and the like.

[Configuration of Remote Control Transmitter 201] FIG. 9 shows the appearance of the remote control transmitter 201, and FIG. 10 shows the internal circuit configuration. Remote control transmitter 201 has multiple keys 2
09 (B0 to B11, F0 to F10) and the display unit 20
Have eight. The key 209 is mounted on the conductive rubber laid on the keyboard substrate. A laser oscillation circuit 207 is mounted on the keyboard substrate in addition to the processing circuit 202 including the memory 202a, the clock circuit 204, the battery 205, and the LED circuit 206. When the key 209 is pressed, the conductive rubber is pressed against the key matrix portion 203 of the keyboard substrate to conduct electricity, and it is determined which one of the plurality of keys 209 has been pressed in the processing circuit 202. A code that does not overlap with other keys is assigned to each key 209 in advance. The code signal of the key 209 pressed by the processing circuit 202 is converted into serial data, and the LED circuit 206 converts the electric signal into an infrared signal and transmits the infrared signal. Further, the remote control transmitter 201 can set the machine number of the OHP device 10 as a receiver, and can control only a specific OHP device among a plurality of OHP devices. Numeric keypad (F0-F9) of keys 209
Set the machine number with and press the set key (F10),
The machine number is stored in the memory 202a of the processing circuit 202. At the same time, the set machine number is displayed on the display unit 208. When the keys (B1 to B11) are pressed, as shown in FIG. 11, the machine number code corresponding to the machine number stored in the memory 202a, the data code for controlling the operation, and the other remote controller transmitter when there are a plurality of remote controller transmitters are displayed. Of the system code and the data code for distinguishing from the remote control transmitter, the extension code used with the extension of the function is transmitted. When the OHP device 10 receives these codes, it judges the machine number code, and only when it matches the machine number preset by the machine number setting switch 68, the OHP device 10 operates according to the next data code. Further, when the key (B0) is pressed, the laser oscillation circuit 207 is activated to emit the laser only while the laser pointer is being pressed.
No code has been specifically assigned to remotely control the laser pointer.

The transmission code serially output from the remote control transmitter 201 is 15 bits C1 to C15,
As described above, the system codes C1 to C5, the machine body number codes C6 to C9, the data codes C10 to C15, and the extended codes C12 to C14 of the day codes are included. System codes C1 to C5 are remote control transmitter 2
Corresponding to 01, it is also written in the built-in ROM of the one-chip microcomputer 115 on the OHP device 10 side.

FIG. 12 shows the machine number set in the remote control transmitter 201 and the machine number code transmitted according to the machine number. As mentioned above, the machine number setting switch 6
When the machine number set by 8 and the received machine number code match, the OHP device 10 operates according to the data code. If the machine number of the remote control transmitter 201 is set to “0”, all OHPs will be performed regardless of the machine number.
The device can be operated. That is, the control circuit 110
Determines whether it is designated by the combination of three bits "0" of the machine number codes C6 to C9. FIG. 13 shows keys 209 of the remote control transmitter 201.
Among them, the data codes C10 to C15 set when the B0 to B11 keys are pressed are shown. FIG. 14 shows received data that is converted into a parallel signal by the processing circuit 125 when the serial signal output from the remote control transmitter 201 is received by the light receiving unit 121 of the remote control receiving circuit 118 described above and its function. For example, if the single-feed button B1 is pressed, the sheet feeder 30
Feeds one sheet 15 and pushes the one sheet return button B2 to return one sheet 15 one sheet. The fine feed button B3 is used to move the position of the sheet 15 to the feed side, and the sheet 15 moves only while being pressed. The fine adjustment return button B4 is used to move the position of the sheet 15 to the return side, and the sheet 15 moves only while being pressed. Sheet ejection button B
Press 5 to eject sheet 15, then press preset button B6
Press to rewind to the first sheet 15. When the stop button B7 is pressed, one sheet is fed and sheet discharge or preset is interrupted.

[Operation of Sheet Feeder 30] Next, the basic operation of the sheet feeder 30 will be described. When the power is turned on, the path changeover switch 127 provided on the body of the sheet feeder 30 is set to the sheet set path. This sheet set path has a path changeover switch 12
When the preset button B6 of the remote control transmitter 201 is pressed while 7 is set, the one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 133 to drive the winding motor 62 with a constant current. Transport film 36
And the pressing film 38 starts rewinding by the rotation of the rewinding motor 62, and when the sheet position sensor 64 detects the rewind end coma mark 71, the rewinding motor 62.
Drive stops. Next, when one sheet 15 is set on the tray 54, the sheet sensor 54C detects the presence of the sheet 15, and upon receipt of this detection signal, the one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 131. Feed motor 42 is driven at a constant current. By the feed motor 42, the transport film 36 and the pressing film 3
8 moves again to the feed roll 41 side, but at this time, the sheet 15 set on the tray 54 is fed by the paper feed roller 51,
52 for conveying film 36 and pressing film 3
It is sandwiched between 8. When the sandwiched sheet 15 moves in a layer with the transport film 36 and the pressing film 38 and reaches the platen glass 12, the transport film 36 is conveyed.
The driving of the feed motor 42 is stopped by detecting the frame mark 71 formed on the sheet position sensor 64 by the sheet position sensor 64. Then, the next sheet 15 is placed on the tray 54.
When set on, the same thing is repeated. When the last sheet 15 is set and the driving of the feed motor 42 is stopped by the sheet position sensor 64, the preset button B6 of the remote control transmitter 201 is pressed again, and the one-chip microcomputer 11 is sent via the remote control receiving circuit 118.
The preset command is input to 5 again. The one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 133 to drive the winding motor 62 with a constant current. As a result, the transport film 36 and the pressing film are rewound on the rolls 57 and 59 again, and at the same time, the sheet 15 is scooped by the scooping portion 54e and placed on the tray 54 in order. When the winding motor 62 is stopped, the setting of the sheet 15 is completed.

Next, when the one-sheet feed button B1 of the remote control transmitter 201 is pressed, a one-sheet feed command is input to the one-chip microcomputer 115 via the remote control reception circuit 118. The one-chip microcomputer 115 is a constant current circuit 131
A phase switching signal having a constant cycle is output to drive the feed motor 42 with a constant current. Conveying film 36 and pressing film 3
One sheet 15 sandwiched between 8 is platen glass 1
Will be sent over 2. As described above, when the sheet position sensor 64 detects the frame mark 71, the feed motor 42
Is stopped, whereby the sheet 15 is positioned on the platen glass 12. The image formed on the sheet 15 is projected on the screen by a halogen lamp incorporated in the main body 10a of the OHP device 10. By this repetition, the sheet 15 is continuously projected from the first sheet to the final sheet.

When the one sheet return button B2 of the remote control transmitter 201 is pressed, a command for returning one sheet is input to the one-chip microcomputer 115 via the remote control receiving circuit 118. As a result, the one-chip microcomputer 1
Reference numeral 15 outputs a phase switching signal of a constant cycle to the constant current circuit 133 to drive the winding motor 62 with a constant current. When the sheet position sensor 64 detects that one sheet 15 has been returned, the drive of the winding motor 62 is stopped. This allows
The sheet 15 returned by one sheet is projected.

Further, when it is desired to slightly shift the position of the sheet 15 set on the platen glass 12 in the feed direction, the fine adjustment feed button B3 of the remote control transmitter 201 is used.
When is pressed, a command for fine adjustment feed is input to the one-chip microcomputer 115 via the remote control receiving circuit 118. The one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 131 for a short period of time to drive the feed motor 42 with a constant current. Similarly, when the fine adjustment return button B4 of the remote control transmitter 201 is pressed, a fine adjustment return command is input to the one-chip microcomputer 115 via the remote control reception circuit 118.
The one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 133 for a short period of time to output the winding motor 6
2 is driven with a constant current. Both the fine adjustment feed and the fine adjustment return commands drive the feed motor 42 and the winding motor 62 only while the fine adjustment feed button B3 and the fine adjustment return button B4 are being pressed. The cycle of the phase switching signal for fine adjustment feed and fine adjustment return is set longer than that for single feed and single return, and the transport speed for single feed and single return is smaller than that for fine adjustment and fine return. It's getting faster. Further, as described above, when the stop button B7 of the remote control transmitter 201 is pressed while the sheet 15 is being fed or returned one by one, the one-chip microcomputer 115 is instructed to stop via the remote control receiving circuit 118. The input is stopped, and the drive of the feed motor 42 or the winding motor 62 is stopped.

When the sheet 15 is discharged to the outside of the machine, first, the path changeover switch 127 is set to the discharge side and the sheet discharge button B5 of the remote control transmitter 201 is pressed, and then the one-chip microcomputer 115 passes through the remote control receiving circuit 118. Sheet discharge command is input. As a result, the one-chip microcomputer 115 outputs a phase switching signal of a constant cycle to the constant current circuit 133 to drive the winding motor 62 with a constant current,
The sheets 15 are discharged one by one out of the machine. The above-described control such as reading of each sensor and each switch through the remote control receiving circuit 118 by the one-chip microcomputer 115 and output of a phase switching signal to the constant current circuits 131 and 133 is built in the one-chip microcomputer 115. It is executed by the program of the processing procedure stored in the ROM.

[Turning operation of the light receiving unit 121] Next, the turning operation of the light receiving unit 121 will be described.
FIG. 15 is a flowchart showing the turning operation. OHP
At the same time when the power of the device 10 is turned on, the control circuit 110 causes the motor 158 to rotate forward through the light receiving unit drive circuit 151 (step S310). The motor 158 has a light receiving portion 15
Energization is performed for T seconds, which is a time sufficient for the 3 to make one rotation. A circular substrate 152 that is driven by a motor 158 to rotate.
Since the rotation is restricted by the stopper 159, it stops at a position where it hits the stopper 159, and only the pulley 156 idles in accordance with the rotation of the motor 158. After T seconds have passed, this time, the motor is energized in the opposite phase for the same T seconds to rotate the motor 158 in the opposite direction. After that, the same operation is repeated until the light receiving unit 153 receives the infrared signal (step S315). The rotation of the motor 158 is stopped at the moment when the light receiving unit 153 receives the infrared signal (step S320). At the stop position, the light receiving unit 153 receives the subsequent infrared signal, and the control circuit 110 executes the corresponding process (step S330). As a result of processing,
System code C1 to C5, machine number code C6 to C9
If they match, the control according to the data codes C10 to C15 is executed (step S345), but if they do not match, the control is not executed (step S34).
0). If the light receiving unit 153 remains at the stop position for a set time sufficient to execute the control, this routine is once ended (step S350). When the routine is started again, the rotation of the light receiving section 153 is restarted in step S310. In this way, by stopping the rotation of the motor 158 and directing the light receiving unit 153 toward the remote control transmitter 201, the next infrared signal can be quickly caught. As described above, since the light receiving unit 121 has the mechanism for turning the light receiving unit 153, the light receiving unit 153 is not limited to the range of the directional characteristics,
An infrared signal from the remote control transmitter 201 can be received over a wide range. This means that the OHP device 1
This gives freedom to the place where 0 is placed.

[Conveying Operation of Sheet 15] Next, the conveying operation of the sheet 15 will be described as an example of the control of the OHP device 10 executed in the above-described step S345. FIG. 16 is a flowchart showing the operation of conveying the sheet 15. First, it is determined whether or not the received data D0 to D3 is in the single-sheet feeding mode (step S560), and when it is in the single-sheet feeding mode, the sequence control of the single-sheet feeding operation is performed to set the sheet 15 on the platen glass 12 to 1 The sheet is advanced (step S580). If it is not the one-sheet feed mode, it is determined whether the one-sheet return mode is set (step S57).
0) When in the 1-sheet returning mode, the sequence control of the 1-sheet returning operation is performed and the sheet 15 is placed on the platen glass 12.
One sheet is rewound and this routine is once ended (step S590). If it is not the one-sheet return mode, it is further determined whether or not it is the fine adjustment mode (step S610). If it is the fine adjustment mode, the fine adjustment operation sequence control is performed and this routine is once ended (step S630). If it is not the fine adjustment mode, it is further determined whether or not it is the sheet discharge mode (step S620). If it is the sheet discharge mode, the sheet discharge operation control sequence is executed (step S640). It ends once. Thus, the sheet 15 can be moved slightly by using the fine adjustment mode.

[Timer Function] Next, the control circuit 110
The timer function executed by will be described. FIG. 17 is a flowchart showing the timer function. This routine is repeatedly executed by the control circuit 110. First, the timer ON / OFF key 122e is turned ON.
If the count start key 122c is pressed, the time setting switch 122b determines whether the presentation time is set (step S4).
10) If it is not set, this routine is once ended. If set, time setting switch 122b
The remaining time of the time set at is displayed on the display unit 122a (step S420). The remaining time is displayed every 5 minutes (step S430), and 5 minutes before the end of the presentation, the buzzer 122f is sounded only once to inform the presenter of the time (step S440). The display is lighted up assuming that the remaining time has reached 5 minutes ago (step S44).
5) When the set time is reached (step S450), the buzzer 122f is sounded twice and the display section 122a is displayed in blinking to notify the presenter that the end time has come (step S460). Also, when the count stop key 122d is pressed midway, the control circuit 1
10 temporarily suspends this routine, and saves the state up to that point in the RAM built in the one-chip microcomputer 115. When the count start key 122c is pressed again, the state immediately before the stop is resumed. In this way, the presenter can be given time to give a presentation effectively by notifying the presenter of the passage of time by the sound of the buzzer 122f and the change in the display.

As described above, in this embodiment, when the sheet feeder 30 automatically feeds the sheet 15 and positions it at a predetermined position on the platen glass 12, the transport film 3 is used.
By sandwiching the sheet 15 between 6 and the pressing film 38 and conveying the sheet 15, the sheet 15 is conveyed while being held at a fixed position with respect to the conveying film 36 without being affected by disturbances such as air resistance and wind. Therefore, the edge of the sheet 15 does not float on the platen glass 12.
Since both sides of the sheet 15 are wrapped, the sheet 15 can be conveyed in a protected state without being damaged.

Further, according to the present embodiment, the remote control transmitter 201 is used to control the equipment related to the presentation using the OHP device 10, such as the opening / closing of the curtain and the ON / OFF control of the lighting equipment. Since it is done, the presenter can multi-control while being at the side of the screen to make the presentation even more effective.

[Other Embodiments] FIG. 18 shows the configuration of a remote control transmitter 601 as another embodiment. The configuration is almost the same as that of the remote control transmitter 201 of the above embodiment, but only different portions will be described. The remote control transmitter 601 is additionally provided with four keys (G0 to G3) such as a time setting key G0, and a buzzer 610 is attached to the front. Further, the ten keys (F0 to F9) have been upgraded, and the time of the timer can be set with four digit numbers by using the ten keys (F0 to F9). Display 6
Of 08, the first two digits represent a fraction and the next two digits represent a second. When you first enter a number with the numeric keypad, that number is displayed in the lowest digit of the display. Next, when a number is entered with the ten keys, the first entered number is shifted to the next digit of the display and displayed, and the second entered with the ten key is displayed in the lowest digit. When you enter the number with the ten-key pad for the third time, the two-digit number that has already been displayed is shifted to the next place and displayed. Similarly, 4
When the time setting key G0 is pressed after inputting the number of digits, a code signal indicating this is transmitted. At the same time, the buzzer 610 sounds to indicate that the signal has been transmitted. Further, when the OHP device 10 receives the transmission signal from the remote control transmitter 601 via the remote control receiving circuit 118, the set time is displayed on the display section 122a of the timer setting display section 69. Furthermore, the remote control transmitter 601 has a timer ON / OFF.
A key G3 is provided, and pressing this key
N and OFF are switched, and at the same time, the buzzer 601 sounds. Similarly, when the count start key G1 is pressed after setting the presentation time, the countdown starts. If the count stop key G2 is pressed during the countdown, the countdown is temporarily stopped. Again, the count start key G1 is restarted to count down. Similarly, when the count start key G1 and the count stop key G2 are pressed, the buzzer 601 sounds similarly to notify that the count start and count stop have been performed.

The above embodiment can be variously modified without departing from the scope of the present invention. For example, a liquid crystal shutter capable of setting data indicating the remaining time displayed on the display unit 122a may be provided at one corner of the platen glass, and at this time, the remaining time can be simultaneously displayed at one corner of the image projected on the screen. . Further, the image on the sheet may be projected on the screen by reflected light instead of being transmitted light. Further, the projected image may be either a reverse image or a normal image with respect to the image formed on the sheet. The remote operation may be performed by a radio signal having a unique frequency other than the infrared signal. The remote control transmitter may be provided with a timer, a buzzer for notifying the arrival of time, and a display unit. At this time, the remote control transmitter and the OHP device may communicate in both directions.
It is also possible to adopt a configuration in which when the time measured by the HP device reaches a set value, it is transmitted to the remote control transmitter and the display section of the remote control transmitter blinks. Light receiving part has a solid angle of 4π
It may be possible to receive light from all directions, and at this time, by adding a configuration in which the light receiving part is rotated around a predetermined axis, it is possible that there is a shield between the remote control transmitter and it cannot be received as it is. It may be possible to receive even in a small range. Further, although the light receiving section 153 is configured to rotate about one axis, it may be configured to rotate about two axes. At this time, the two axes may be provided so as to be orthogonal to each other or at a predetermined angle. Either is fine. Further, a cable may be provided in the middle such as an optical fiber. Instead of using the model number data to specify the OHP device, the signal protocol may be changed so that only the specific OHP device can receive the data. The timer may be configured to start upon the replacement of the seat, or the lap time of each seat may be displayed or stored each time the seat is replaced. Instead of the OHP device 10 that projects the image of the sheet 15 placed on the platen glass, a slide projector that sets a slide film in a cassette and projects the image may be used.

[0040]

Since the sheet conveying means is controlled by remote control, the presenter does not have to bother to approach the image projecting means in order to replace the sheet. Moreover, since the presentation time and other times are set by remote control, it is possible to avoid having to approach them in the same way.
Further, since the notification means notifies the elapse of the set time, the presenter can effectively distribute the time and give a presentation without hassle. Also,
Even if the image projection device is placed in a place where the light signal from the presenter is hard to reach depending on the direction because the light receiving means provided in the sheet conveying means has directivity, the light receiving means is rotated by the rotation driving means. Therefore, the optical signal from the light emitting means carried by the presenter can be easily received.
Further, when operating a plurality of image projecting means, the determining means determines whether the model number set by the model number setting means and the model number transmitted by the remote control means match each other. Then, they can be selectively and efficiently operated. As described above, the present invention can solve the conventional problems at once by the multi-control using the remote control means, and can give an efficient presentation.

[Brief description of drawings]

FIG. 1 is a schematic view showing a structure of a sheet feeder 30 mounted on an OHP device 10 according to an embodiment.

FIG. 2 is a cross-sectional view showing a structure of a sheet feeder 30.

FIG. 3 is a sheet 15 placed on a platen glass 12.
It is explanatory drawing which shows the position.

FIG. 4 is a block diagram showing a configuration of a control circuit 110.

5 is a front view showing the external appearance of a timer setting display unit 69. FIG.

FIG. 6 is a block diagram showing a configuration of a remote control receiving circuit 118.

FIG. 7 is a circuit diagram showing a configuration of a light receiving unit 121.

FIG. 8 is a perspective view showing a drive system of the light receiving unit 121.

9 is a perspective view showing the external appearance of a remote control transmitter 201. FIG.

10 is a schematic circuit diagram showing an internal electric circuit of the remote control transmitter 201. FIG.

FIG. 11 is an explanatory diagram showing the structure of a transmission code.

FIG. 12 is an explanatory diagram showing a machine number code corresponding to a machine number.

FIG. 13 is an explanatory diagram showing a data code corresponding to a key.

FIG. 14 is an explanatory diagram showing received data corresponding to a key function.

FIG. 15 is a flowchart showing a turning operation of the light receiving unit 121.

FIG. 16 is a flowchart showing a conveying operation of the sheet 15.

FIG. 17 is a flowchart showing the operation of the timer.

FIG. 18 is a perspective view showing the configuration of a remote control transmitter 601 according to another embodiment.

[Explanation of symbols]

 10 ... OHP device 15 ... Sheet 30 ... Sheet feeder 36 ... Conveying film 38 ... Holding film 201, 601 ... Remote control transmitter

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hideaki Furukawa 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (8)

[Claims] 1. An image projecting means for projecting an image of a sheet positioned at a predetermined location, a sheet transporting means for transporting the sheet to the predetermined location, and a remote control means for remotely controlling the sheet transporting means. Image projection device equipped. 2. An image projecting means for projecting an image of a sheet positioned at a predetermined location, a sheet transporting means for transporting the sheet to the predetermined location, and a remote control means for remotely controlling the sheet transporting means. An image projection apparatus comprising: time setting means for setting time by the remote control means; and notifying means for notifying arrival of the set time. 3. The image projection device according to claim 2, wherein the notifying unit makes a notification by displaying and sounding. 4. The image projection apparatus according to claim 2, wherein at least one of the time setting means and the notification means is provided in the remote control means. 5. An image projecting means for projecting an image of a sheet positioned at a predetermined location, a sheet transporting means for transporting the sheet to the predetermined location, and a remote control means for controlling the sheet transporting means by an optical signal. A light emitting means provided in the remote control means for emitting the optical signal; a light receiving means provided in the sheet conveying means for limiting a direction for receiving the optical signal; and a rotation driving means for rotating the light receiving means. An image projection device including: 6. The image projection apparatus according to claim 5, wherein the rotation driving means includes a locking means at a predetermined indexing position. 7. An image projecting means for projecting an image of a sheet positioned at a predetermined location, a sheet transporting means for transporting the sheet to the predetermined location, and a remote control means for remotely controlling the sheet transporting means. The remote control means includes an identification number transmission means for transmitting an identification number, the sheet conveying means is an identification number setting means for setting the identification number, and the set identification number and the identification number transmission means are used for transmission. And an identification number for determining whether the identification number coincides with the identification number. 8. The image projection apparatus according to claim 7, wherein the remote control device includes display means for displaying the identification number.