JPH0635067A - Projecting device - Google Patents

Abstract

PURPOSE:To reproduce data from a magnetic recording part at the time of feeding film, to store the data for every frame of the film and to display the stored data for every frame of the film in order to visually display the data reproduced from a magnetic track corresponding to each exposed frame. CONSTITUTION:A microcomputer 1 winds the exposed film 12 in a film cartridge 11 by a film feeding device 3, and the data is reproduced from the film 12 by a magnetic information control circuit 6 and stored in a storage circuit 7. A display control circuit 2 projects the image of the film 12 on a screen 9 in response to the operation of an operation switch 8. At the same time, the microcomputer 1 reads out the corresponding data from the storage circuit 7 so as to display on a display panel 10 provided on the screen 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection apparatus, and more particularly to a projection apparatus for projecting a film having a magnetic recording section.

[0002]

2. Description of the Related Art Conventionally, an apparatus for reproducing various data corresponding to frames photographed on film has been considered.
For example, there is known a system that automatically projects a slide film in synchronization with an audio signal from a cassette tape recorder.

In movie projectors, a technique for projecting a film while reproducing audio data from the soundtrack of the film has been established. According to this, it is possible to simultaneously reproduce the sound while visually recognizing the image on the film.

[0004]

However, the system using the above cassette tape recorder requires a system for connecting two recording media, that is, a cassette tape and a slide film. Therefore, the structure is complicated and the operation is troublesome for the operator.

Further, the above movie projector is for recording audio data, and there is a means for visually reproducing the data corresponding to each photographing frame stored in the magnetic track of the film. It was not done.

The present invention has been made in view of the above problems, and provides a projection apparatus capable of visually displaying the data reproduced from the magnetic track corresponding to each frame when projecting each shooting frame of the film. The purpose is to provide.

[0007]

That is, the present invention relates to a projection device for projecting a film having a magnetic recording portion capable of recording / reproducing data, and a feeding means for feeding the film. When the film is fed by the feeding means, a reproducing means for reproducing the data from the magnetic recording portion of the film, a storing means for storing the data reproduced by the reproducing means for each frame of the film, and the storing means. And a display means for displaying the produced data for each frame of the film.

According to the present invention, the changing means for changing the contents stored in the storing means in accordance with the change in the data displayed by the displaying means, and the contents of the storing means changed by the changing means, Recording means for recording in the magnetic recording portion of the film when the film is fed by the feeding means.

[0009]

In the projection apparatus of the present invention, the photographed film loaded in the film cartridge is temporarily wound up by the film feeding means, and at this time, the reproducing means reproduces the data from the film and stores it in the storing means. Then, in response to the operation of the operation switch, the film is projected, and at the same time, corresponding data is read from the storage means and displayed on the display means.

Further, the data stored in the storage means can be changed according to the operation of the operation switch.
The data in the storage means is recorded on the film in association with the operation of rewinding the film onto the film cartridge.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment according to the projection apparatus of the present invention. In the figure, a microcomputer (μCOM) 1 controls the entire system. A display control circuit 2, a film feeding device 3, a light source control circuit 4, a film movement amount detection unit 5, a magnetic information control circuit 6, a storage circuit 7 and an operation switch 8 are connected to the microcomputer 1.

The display control circuit 2 displays the data transferred from the microcomputer 1 on the display panel 10 provided on the screen 9. This data is reproduced from a magnetic track described later.

The film feeding device 3 is for moving the film 12 loaded in the film cartridge 11 to a predetermined position in order to project the film 12 onto the screen 9. It is assumed that a developed slide film is loaded in the film cartridge 11. The reason why the film 12 is stored in the film cartridge 11 as long as it is is that it is convenient when data is reproduced from the magnetic track of the film 12.

The light source control circuit 4 controls the brightness of the lamp 13 for projecting an image on the film 12. Lamp 13
Light of the diffuser plate 1 becomes parallel rays by the lens 14.
The light is projected onto the film 12 through 5. Then, the image of the film 12 is formed on the screen 9 by the lens 16. Here, since the image on the screen 9 is configured to be viewed from the back side, the image of the lens 16 is horizontally inverted by the mirror 17.

As the film movement amount detecting section 5, for example, a photo reflector (PR) is used. The film movement amount detection unit 5 is provided with a perforation 12 a of the film 12.
Is detected and a pulse signal is output to the microcomputer 1. Further, the magnetic information control circuit 6 executes the data reproduction from the magnetic track of the film 12 and the data recording on the magnetic track based on the instruction of the microcomputer 1.

The recording circuit 7 is for temporarily recording the data reproduced from the magnetic track of the film 12. Further, the operation switch 8 is used to perform operations such as changing the moving display of the film 12 and changing the data recorded on the magnetic track. FIG. 2 is a block diagram showing the details of the magnetic information control circuit 6.

The control IC 18 controls the control lines CS, DL,
Communication with the microcomputer 1 is performed by D7 to D0. Then, based on the command from the microcomputer 1, the control IC 18 performs the data recording operation on the magnetic track 22 and the data reproducing operation from the magnetic track 22 through the buffers 19 and 20 and the magnetic head 21.

The buffers 19 and 20 supply a current to the magnetic head 21 according to the outputs of OUT1 and OUT0 of the control IC 18 at the time of recording data. The magnetic head 21 records data on the magnetic track 22 and the magnetic track 2
It is used for reproduction of data from 2.

The head amplifier 23 amplifies a signal generated by the magnetic head 21 in response to a magnetic field on the magnetic track 22 during data reproduction. This amplified signal is used as a comparator 24, a comparator 25, an OR circuit 2
The waveform is shaped by 6. Then, the control IC 18 reads the data on the magnetic track 22 from the waveform-shaped signal and the synchronization signal.

A clock signal input to CLK is used as a synchronizing signal necessary for recording and reproducing data. CL
The clock signal input to K is created based on the data on the magnetic track 22 of the film 12.

On the other hand, the magnetic head 27 has the magnetic track 2
8 for reading the clock signal. The signal output of the magnetic head 27 is the head amplifier 29 and the comparator 3.
0, the waveform is shaped by the OR circuit 32 via the comparator 31, and is input to CLK.

Next, referring to the time chart of FIG.
The operation of the control IC 18 will be described. The data recording method is an NRZ1 (Non Return to Zero change to 1) recording method. First, the data recording operation will be described.

For example, it is assumed that the data "10110001" is recorded on the magnetic track 22. Magnetic track 2
The data actually recorded in 2 is the start data (1) of the start bit (START bit) and the stop bit (STOP) in the above data.
Write "1101100011" to which "1" of bit) is added. The two bits are added for the convenience of data reproduction.

Data is recorded by making one of the binary information (in this embodiment, "1") correspond to the reversal of magnetization. That is, when it is "1", the magnetization state is inverted to the saturation value of N → S (or the saturation value of S → N), and when it is "0", it is left as it is. In order to perform this operation, when it is "1", the output is changed from OUT1 to OUT0 (or OUT0
→ OUT1), the current of the magnetic head 21 is inverted. A sufficient current flows through the magnetic head 21 to saturate the magnetic material. The time when the control IC 18 outputs each data (“1” or “0”) is determined by the synchronization signal. A clock signal input to CLK is used as this synchronization signal. Next, the data reproducing operation will be described.

When the magnetized magnetic body moves in front of the magnetic head 21, the magnetic flux passing through the magnetic head 21 changes, and a signal voltage corresponding to the data on the magnetic body is generated. This signal is amplified by the head amplifier 23 and input to the two comparators 24 and 25. The comparator 24 compares the output of the head amplifier 23 with + Vref and the comparator 25 with -Vref.

Both the positive and negative signals appearing at the output of the head amplifier 23 correspond to data "1". Both signals detected by the comparators 24 and 25 are combined by the OR circuit 26 to form the control IC 18
Is input to the DT. The control IC 18 reproduces the data recorded on the magnetic body by the input signal and the synchronizing signal.

The synchronizing signal required for recording and reproducing data is obtained by the clock signal reproduced from the magnetic track 28. The signal of the magnetic track 28 detected by the magnetic head 27 is converted into a clock signal by a head amplifier 29, comparators 30 and 31, and an OR circuit 32. Next, a communication method between the control IC 18 and the microcomputer 1 will be described based on the time charts of FIGS.

Communication is started when the microcomputer 1 sets the CS line from high level (Hi) to low level (Lo). The communication request is generated only from the microcomputer 1. After setting the CS line to Lo, the microcomputer 1
Command data is output to the 8-bit data bus lines D7 to D0 in synchronization with the latch signal on the L line. The command data is used by the control IC 18 to identify the communication mode. Therefore, the command data is located at the head of the communication data in any communication mode.

Referring to FIG. 4, the store mode is a mode in which the data to be recorded is stored in the memory in the control IC 18 prior to the data recording operation on the magnetic track 22. As described above, the microcomputer 1 outputs the command data to the control IC 18 in the order of recording the data to be recorded on the magnetic track 22 after outputting the command data. The microcomputer 1 outputs a start code and an end code before and after the data. The start code and the end code are given for the convenience of reproducing the data from the magnetic track 22. When the transfer of all data is completed, the microcomputer 1 sets the CS line from Lo to Hi and the communication is completed.

The write mode is a mode for recording data on the magnetic track. As shown in FIG. 5, when the command data from the microcomputer 1 is input, the control IC 18 converts the recording data already transferred in the store mode into serial data and records it on the magnetic track 22. When the control IC 18 writes the data from the start code to the end code, the operation ends. When the operation is completed, the control IC 18 outputs an end signal to the DL line. When this signal is input, the microcomputer 1 sets the CS line to L
Set from o to Hi.

The read mode is a mode for reproducing the data recorded on the magnetic track 22. Referring to FIG. 6, when the command data from the microcomputer 1 is input, the control IC 18 reproduces the data recorded on the magnetic track 22. When 8 bits of data are input, the data bus lines D7 to D0
Output to. Since the control IC 18 outputs a signal to the DL line for data latching, the microcomputer 1 may fetch the data in synchronization with the signal on the DL line. For reproducing operation, the microcomputer 1 sets the CS line to Lo.
To set to Hi.

FIG. 7 is a view showing the film feeding device, FIG.
FIG. 3 is a perspective view showing a film cartridge used in this projection apparatus. A slide film which has been developed is loaded in the film cartridge 11.

A pinion gear 34 is provided on the output shaft of the film winding motor 33 (M1) provided in the main body of the projection apparatus. The sun gear 35 meshes with the pinion gear 34 and meshes with the planet gear 36. This planetary gear 36 has a spring 37 fixed at one end.
Is supported so as to revolve around the rotation axis of the sun gear 35 via a gear arm 38 to which the other end of is connected.

In a film winding chamber (not shown) provided in the main body of the projection apparatus, a winding spool 39 for winding the film is rotatably provided. On the upper end surface of the take-up spool 39, a spool gear 39a that meshes with the planet gear 36 when the planet gear 36 revolves counterclockwise.
However, it is provided integrally. However, as mentioned above,
Since the gear arm 38 is connected to the spring 37, the tension of the spring 37 prevents the planetary gear 36 and the spool gear 39a from meshing with each other unless the motor 33 rotates clockwise. FIG. 7 shows a state in which the motor 33 is rotating clockwise.

On the lower peripheral surface of the take-up spool 39,
7 and 8, a perforation locking claw 39b that engages with the perforation 12a of the film 12 traveling in the direction of the arrow A in the drawing is formed to project.

A pinion gear 41 is provided on the output shaft of the film rewinding motor 40 (M2) provided in the main body of the projection apparatus. The sun gear 42 meshes with the pinion gear 41 and meshes with the planet gear 43. The planetary gear 43 is supported so as to be revolved around the rotation axis of the sun gear 42 via a gear arm 45 to which the other end of a spring 44 having one end fixed is connected.

A film cartridge 1 is provided in the main body of the projection apparatus.
A storage chamber for storing 1 is provided (not shown). As shown in FIG. 8, a coupler 46 is formed above the storage chamber so that its tip projects in a minus (-) shape.
A coupler gear 47 having is provided rotatably.
The coupler 46 engages with a groove provided on the upper end surface of a feeding spool 48 provided on the film cartridge 11.
It is integrated with the feed spool 48 around the shaft. The film cartridge 11 is provided with a slit 11a so that the film 12 can be sent out.

When the planetary gear 43 revolves clockwise, the planetary gear 43 meshes with the coupler gear 47. Since the spring 44 is connected to the gear arm 45, the planet gear 43 and the coupler gear 47 do not mesh with each other unless the motor 40 rotates counterclockwise due to the tension of the spring 44.

Further, a photoreflector which is fixed to the main body of the projection apparatus and outputs a pulse signal each time the perforation 12a passes, at a position facing the perforation 12a of the film 12 slightly closer to the center than the take-up spool 39. (PR) 49 is provided.

On the other hand, a magnetic head 50 is provided in the vicinity of the cartridge storage chamber. This magnetic head 50 is
The magnetic head 21 and the magnetic head 27 described above are integrated. Next, the operation of the microcomputer 1 will be described with reference to the flowcharts of FIGS.

FIG. 9 shows the main flow. When the system is powered on, the microcomputer 1 resets on power. Then, initial setting is performed in step S1. Here, the lamp 13 is turned on by the light source control circuit 4, and the data in the storage circuit 7 is cleared. Next, in step S2, the data in the storage circuit 7 is transferred to the display control circuit 2. The data transferred here is the data corresponding to the film counter FCNT. In order to display this data, the display control circuit 2 controls the display panel 10.

After inputting the state of the operation switch 8 in step S3, the operation switch 8 is set to 1 in step S4.
The state of the start switch (START SW) is determined. When it is detected that the switch has changed from off to on, the process proceeds to step S5 and the winding subroutine is executed. When the execution of this subroutine is completed, the process proceeds to step S2 to receive the next operation.

The operator, after loading the film cartridge 11 into the projection device, and before operating the other operation switches 8,
Operate the START SW. Then, the film 12 is wound on the winding spool 39 by the operation of the winding subroutine. Then, in conjunction with this operation, data is reproduced from the magnetic track of the film 12. Further, this data is stored in the storage circuit 7. This subroutine will be described later.

On the other hand, if it is determined in step 4 that the operation switch 8 has not changed, the operation proceeds to step 6 and one of the operation switches 8, an up switch (UPS).
The state of W) is determined. Here, when the UP SW is operated, the process proceeds to step S7, and the film 12 is wound onto the take-up spool 39 for one frame.

If the UP SW is not operated in step S6, the operation proceeds to step S8 and the operation switch 8
Of the down switch (DOWN SW), which is one of the above. When the DOWN SW is operated in step S8, the process proceeds to step S9, and the film 12 is rewound by one frame onto the film cartridge 11. Therefore, the operator can project the film of the desired frame 9 on the screen by operating the UP SW and DOWN SW. When the movement of the film 12 is completed, the process returns to step S2.

In step S2, the data corresponding to the frame being shot is read from the storage circuit 7 and transferred to the display control circuit 2. Then, the data is displayed on the display panel 10. Therefore, the operator can confirm the data recorded on the desired frame on the display panel 10.

If the DOWN SW is not operated in step S8, the operation proceeds to step S10 and the operation switch 8
The state of the data switch (DATA SW) which is one of the above is determined. When the operator wants to change the data in the memory circuit 7, the operator operates this switch (DATA SW). When the switch is operated, the process proceeds to step S11 to execute the change mode subroutine. In this subroutine, the data in the memory circuit 7 is changed according to the switch operation by the operator. The operation of this subroutine will be described later.

On the other hand, steps S10 to S12
When shifting to, the state of the end switch (END SW) which is one of the operation switches 8 is determined. When the operator takes out the film cartridge 11 from the projector,
Operate the END SW. Here, when the END SW is operated, the process proceeds to step S13 to execute the rewinding subroutine. In this subroutine, film 12
Is rewound onto the film cartridge 11. Also,
When the data in the memory circuit 7 is changed, the data in the memory circuit 7 is recorded on the magnetic track of the film 12 in conjunction with the rewinding operation. Next, the above-described winding subroutine will be described with reference to FIG.

The operator loads the film cartridge into the projection apparatus and then pulls out the film 12 to the take-up spool 39. Then, the operator operates the START SW. Then, this subroutine "winding" is called.

Then, in step S21, the motor 33
Drive (M1) clockwise. By this operation, the film 12 is wound on the winding spool 39. In step S22, a film counter FCNT (not shown) is cleared. Then, in step S23, To is set in the timer counter inside the microcomputer. This To is the time required to wind the film 12 onto the take-up spool 39.

Next, in step S24, the count DOWN of the timer counter is started. And step S2
At 5, the read command is output to the control IC 18. Thus, when the control IC 18 reproduces the data from the magnetic track of the film 12, the control IC 18 outputs the reproduced data to the bus lines D7 to D0 in synchronization with the latch signal of the DL line.

In step S26, the counter for counting the pulse signals of PR49 is cleared. Then, the process proceeds to step S27 to start counting up of this counter. When the value of this counter reaches 8, the film 12
It means that one frame has been wound up.

Then, in step S28, it is determined whether or not the latch signal is output to the DL line. Here, when the latch signal is output, step S2
Move to 9. Then, in step S29, reproduction data is input from the bus line, and this data is stored in the memory circuit 7.

If it is determined in step S28 that there is no latch signal, the process proceeds to step S30. This step S
At 30, it is determined whether the counter value has reached 8.
When the counter value is 8, the process proceeds to step S31 and the film counter FCNT is incremented. Then, the process proceeds to step S26 to initialize the counter. The data transferred to the display control circuit 2 is the data in the storage circuit 7 corresponding to the film counter FCNT.

If the counter value has not reached 8 in step S30, it is determined in step S32 whether the count DOWN of the timer counter has ended. If not completed, the operation returns to step S28 to continue the operation. On the other hand, when it is finished, step S
Proceeding to 33, the operation of the control IC 18 is stopped.

Then, in step S34, the driving of M1 is stopped. Then, in step S35, the current value of the film counter FCNT is stored in the register CNTMAX. This value represents the maximum value of the film counter. Next, the subroutine "change mode" will be described with reference to FIG.

First, in step S41, the data changed by the operator is transferred to the display control circuit 2. Then, this data is displayed on the display panel 10. This data is the data of the memory circuit 7 corresponding to the film counter FCNT. Therefore, the operator can perform an operation for changing the data while referring to the display panel 10. Next, in step S42, the state of the operation switch 7 necessary for the data change operation is input.

Then, in step S43, UP
Determine the SW status. When it is detected that the SW has changed from OFF to ON, the process proceeds to step S44. In this step S44, the address of the data to be changed is incremented. Changeable data is displayed on the display panel 1
Flashes above 0. Therefore, the segment that blinks each time the UP SW is operated changes as shown in FIG. 12A, FIG. 12B, and FIG. 12C, and the blinking portion moves sequentially.

If the UP SW is not operated in step S43, the process proceeds to step S45, and it is determined whether or not the DOWN SW is operated. Here, when the DOWN SW is operated, steps S45 to S46 are performed.
Move to. Then, in this step S46, the address is decremented. In this case, the blinking segment changes as shown in FIG. 12C → FIG. 12B → FIG.

Therefore, the operator can select a desired address by operating the UP SW and DOWN SW while checking the blinking segment. To change the data of the selected address, an alphabet switch (“A”) (not shown) in the operation switch 8 is used.
It is possible by operating SW, "B" SW, ..., "Z" SW) and numerical switches ("0" SW, "1" SW, ..., "9" SW). The states of these alphabetic switches and numerical switches are determined in steps S47 to S72 and steps S73 to S82.

When the operation of each switch is detected in steps S47 to S72 and steps S73 to S82, the process proceeds to step S83. Then, the data in the memory circuit 7 corresponding to the selected address is changed.
Next, in step S84, the write flag is set (← 1). When this flag is set, the data in the memory circuit 7 is stored in the film 1 in the rewinding operation described later.
2 is recorded. Then, in order to display the changed data, the process proceeds to step S41.

Further, steps S82 to S85
When it shifts to, the state of DATA SW is judged. When this SW is operated, the change mode is completed, and the process returns. Next, the rewinding subroutine will be described with reference to FIG.

First, in step S91, it is determined whether or not there is a write flag. This light flag is
As described above, it is set when the data in the memory circuit 7 is changed. If the flag is not set, the process proceeds to step S92, and if it is set, the process proceeds to step S99. When the flag is not set, the film 12 is loaded into the film cartridge 11
If it rewinds to, the operation is completed.

That is, in step S92, the rewinding motor 40 (M2) is driven counterclockwise. This allows
The film 12 is rewound onto the film cartridge 11.
Next, in step S93, the counter for counting the pulse signal of PR49 is cleared, and then in step S94, the count-up operation of the counter is started.

Then, in step S95, the process waits until the counter value reaches 8. When it reaches 8, it means that the rewinding for one frame has been completed. Therefore, step S96
Then, the film counter FCNT is decremented. Next, in step S97, it is determined whether the value of the film counter FCNT has reached 0. If it is not 0, the process proceeds to step S93 to continue the operation. When it is 0, the drive of M2 is stopped in step S98, and the rewinding operation is completed.

On the other hand, when the write flag is set in step S91, the data in the memory circuit 7 is transferred to the film 1 in association with the rewinding operation of the film 12.
It is necessary to store in two magnetic tracks. Therefore,
In step S99, it is determined whether the film counter FCNT and the register CNTMAX match. Here, if they match, to step S107 described later,
If they do not match, the process proceeds to step S100.

In step S100, M1 is driven clockwise. As a result, the film 12 is wound on the winding spool 39. Then, steps S101 and S10
At 2, the counter for counting the PR49 pulse signal is initialized. Then, in step S103, the process waits until the counter value reaches 8. When the counter value reaches 8, the process proceeds to step S104 and the film counter FC
Increment NT.

In step S105, it is determined whether the value of the film counter has reached the value of the register CNTMAX. Here, when the value of CNTMAX has not been reached, the process proceeds to step S101 to continue the operation. on the other hand,
If the value of CNTMAX is reached, the process proceeds to step S106 to stop driving M1.

The reason why the processes of steps S99 to S106 described above are necessary is that the data in the memory circuit 7 is recorded on the film 12 at once. Since the operator projects an arbitrary frame, it is unknown where the film 12 starts rewinding. Therefore, when the rewinding operation is started from the current frame position, there is no guarantee that all data can be recorded. Therefore, in the next step S107, M2 is driven counterclockwise. As a result, the film 12
Is rewound onto the film cartridge 11.

In steps S108 and S109, PR4
A counter for counting 9 pulse signals is initialized. Then, in step S110, a store command is output to the control IC 18. Next, in step S111, the data corresponding to the current film counter FCNT is read from the memory circuit 7 and transferred to the control IC 18. When the transfer is completed, in step S112, the control IC
The operation of 18 is stopped.

Next, in step S113, the control IC 1
Output a write command to 8. And the control IC 18
Records the data already transferred from the microcomputer 1 on the magnetic track. Step S114
Then, the control IC 18 waits until the recording operation is completed. Here, when the control IC 18 outputs the end signal, the process proceeds to step S115 to stop the operation of the control IC 18.

In step S116, the process waits until the counter value reaches 8. When the counter value reaches 8, it means that the rewinding for one frame is completed, so step S
Proceed to 117 to decrement the film counter FCNT. Then, in step S118, it is determined whether the film counter FCNT has reached 0. If it is not 0, step S1 is performed to continue the operation.
Move to 08. On the other hand, when the value becomes 0, the rewinding operation has been completed, and therefore the process proceeds to step S119 to stop the driving of M2.

FIG. 14 is a block diagram of a projection apparatus according to the second embodiment of the present invention. The part different from the block configuration diagram of FIG. 1 is a display method of data stored in the storage circuit 7. In the first embodiment shown in FIG. 1, data is displayed on the display panel 10.

In the projection apparatus of the second embodiment shown in FIG. 14, data is displayed by providing a transmissive liquid crystal 51 between the film 12 and the diffusion plate 15. Therefore, the data and the image of the film are overlapped and displayed on the screen 9.

[0076]

As described above, according to the present invention, there is provided a projection apparatus capable of visually displaying the data reproduced from the magnetic track corresponding to each frame when projecting each filmed frame. can do.

[Brief description of drawings]

FIG. 1 is a first embodiment according to the projection apparatus of the present invention,
It is the figure which showed the block structure.

2 is a block configuration diagram showing details of a magnetic information control circuit of FIG. 1. FIG.

FIG. 3 is a time chart explaining the operation of the control IC.

FIG. 4 is a time chart showing a store mode for explaining a communication method between a control IC and a microcomputer.

FIG. 5 is a time chart showing a write mode for explaining a communication method between a control IC and a microcomputer.

FIG. 6 is a time chart showing a read mode for explaining a communication method between a control IC and a microcomputer.

FIG. 7 is a diagram showing a film feeding device.

FIG. 8 is a perspective view showing a film cartridge used in this projection apparatus.

FIG. 9 is a main flowchart for explaining the operation of the microcomputer of this projection device.

FIG. 10 is a subroutine for explaining a winding operation.

FIG. 11 is a subroutine for explaining the operation of the change mode.

FIG. 12 is a diagram showing an example of changing data on a display panel.

FIG. 13 is a subroutine for explaining the rewinding operation.

FIG. 14 is a block diagram of a projection device according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Microcomputer (μCOM), 2 2 ′ ... Display control circuit, 3 ... Film feeding device, 4 ... Light source control circuit, 5 ... Film movement amount detection unit, 6 ... Magnetic information control circuit, 7 ... Storage circuit, 8 ... Operation switch, 9 ... Screen, 10 ... Display panel, 11 ... Film cartridge, 1
2 ... Film, 12a ... Perforation, 13 ... Lamp, 14, 16 ... Lens, 15 ... Diffuser, 17 ... Mirror,
18 ... Control IC, 19, 20 ... Buffer, 21, 27 ...
Magnetic heads, 22, 28 ... Magnetic tracks, 23, 29 ...
Head amplifier, 24, 25, 30, 31 ... Comparator, 26, 32 ... OR circuit.

Claims (2)

[Claims] 1. A projection apparatus for projecting a film having a magnetic recording section capable of recording / reproducing data, and a feeding means for feeding the film, and a feeding of the film by the feeding means. Sometimes, reproducing means for reproducing the data from the magnetic recording portion of the film, storage means for storing the data reproduced by the reproducing means for each frame of the film, and the stored data for storing the data in the film. A projection device comprising: a display unit for displaying each frame. 2. The changing means for changing the stored contents of the storage means in response to the change of the data displayed by the display means, and the contents of the storage means changed by the changing means for the feeding. The projection apparatus according to claim 1, further comprising a recording unit that records in a magnetic recording unit of the film when the film is fed by the unit.