JPH02218019A - Optical memory card reading system - Google Patents

Abstract

PURPOSE:To read the data of a card for read/write without changing a circuit by using plural kinds of optical memory cards as the optical memory card, and in addition, forming the format of the optical storage area of the card in the same format, and identifying the kind of the card by a card identifying part by detecting an optical feature. CONSTITUTION:The optical memory card 5 is inserted in the direction of an arrow mark into the card reading part 1 of a card reader, and a load signal is outputted from the reader 4, and a feed roller 12b revolves so as to feed the card 5 to a table 12a. Besides, on the loading of the card 5, an initialization signal is outputted from the reader 4 to a set circuit 22, and the circuit 22 is turned into a set state by this output. At such a time, an optical sensor 10 and the card 5 come to a position where they are opposed to each other, and the light of a light emitting part C1 is reflected by the optical storage area of the card 5 and received by a light receiving part C2. The output from this light receiving part C2 is compared with reference voltage by the comparator 21 of the card discriminating part 2, and the kind of the card 5 is discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical memory card reading system that reads data written on an optical memory card using an optical system using light.

[Prior art and problems to be solved] Conventionally, as optical memory cards that access data using light, there are two types of optical memory cards: a reading card that only plays back pre-recorded data, and a reading card that can both record and play back data. There is a card for use.

These reading cards and reading/writing cards have different optical storage area formats. The reading card has a format in which a plurality of recording bit strings 51 are arranged between track guides 50 as shown in FIG. 4(a) of piS4, and data is read in parallel. In addition, in a read/write card, a track guide 50 is used as shown in FIG. 4(b).
The format is such that a row of recording bits 52 is written in between, and data is read serially.

Due to the difference in format between the reading card and the reading/writing card, it is not possible to use the same device to read the data on the reading card and the reading/writing card, and it is necessary to prepare dedicated devices for each. There was a problem.

Furthermore, even if the formats are the same, the read card and the read/write card have different reflectances due to differences in card manufacturing methods, so the read signal level values of the optical system that performs data reading, focusing, and tracking will differ. However, it was impossible to read data using the same device.

[Means for Solving the Problems] An optical memory card reading system of the present invention that solves the above-mentioned conventional problems is an optical memory card reading system in which data written on an optical memory card is read by an optical head using light. Multiple types of optical memory cards are used as the card, and the format of the optical storage area of the optical memory card is the same, and a card identification section is provided that detects the optical characteristics of the optical memory card with an optical sensor and identifies the type of optical memory card. The present invention also includes a level adjustment section that adjusts the level of the read signal output from the optical head according to the type of the optical memory card based on the identification signal from the card identification section.

Preferably, a reading card and a reading/writing card are used as the plurality of types of optical memory cards.

A detection mark having a different reflectance from other parts is provided on one part of the optical memory card, and the card identification is performed by detecting the presence or absence of the detection mark with a reflective optical sensor of the card identification section.
Alternatively, a reading card and a reading/writing card are used as a plurality of types of optical memory cards, an identification hole is provided in one of the cards, and the presence or absence of the identification hole is detected by a transmission type optical sensor in the card section 11iNlJ to perform card identification.

Further, the level adjustment section includes a voltage dividing circuit or a shunt circuit that changes the level of the read signal output from the optical head, and a changeover switch that switches the voltage dividing circuit or shunt circuit, and the card identification section includes an optical sensor. The configuration may also include a set circuit that operates the changeover switch according to the type of optical memory card detected by.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an optical memory card reading system according to an embodiment of the present invention.

The optical memory card reading system of this embodiment is as follows.

As shown in the figure, it includes a card reading section 1, a card identification section 2, a level adjustment section 3, and a reading device 4. The card reading section l includes an optical reader 11 that reads data on the optical memory card 5 using light such as a laser beam, a mounting mechanism 12 for mounting the optical memory card 5, and a reflection of the optical storage area of the optical memory card 5. It consists of an optical sensor lO that detects the rate.

Here, in the optical memory card reading system of this embodiment, two types of cards are used as the optical memory card 5: a read-only card for reproduction and a replayable read/write card, and these are read into an optical system having the same configuration. 11, the format of the optical storage area of the reading card is the same as the format of the reading/writing card shown in FIG. 4(b), and data is read serially from each card. .

The optical helad 11 is provided with a light source D1 such as a laser diode that emits laser light. Further, D2 is a light receiving section for monitoring the amount of light iDl.

The device R1 & structure 12 is composed of a table 12a on which the optical memory card 5 is placed, a feed roller 12b that feeds the optical memory card 5 onto the table 12a, a motor 12c that drives the feed roller 12b, and its driver 12d. The optical memory card 5 inserted from the outside is sent by the feeding roller 12b and placed on the table 12a for a length tL. The optical memory card 5 placed on the chip chisel 12a is scanned by the optical disk 11 to read data.

The optical sensor 10 is disposed facing each other on the table 12a, and receives the light emitted from the light emitting part C1, which is formed by the light emitting part C1 and the light receiving part C2, and reflected by the optical storage area of the optical memory card 5. When the light enters the part C2, the light receiving part C
2 outputs a voltage signal proportional to the amount of incident light. By observing the magnitude of this output signal, the reflectance of the optical storage area of the optical memory card 5 can be detected.

The card identification section 2 determines the type of the optical memory card 5 based on the output signal of the optical sensor 10 to the level adjustment section 3.
It is configured by a set circuit 22, two amplifiers 20, and a comparator 21. The self-power of the optical sensor 10 is connected to a comparator 21 via an amplifier 20.

The comparator 21 compares the output voltage of the optical sensor 10 with a reference voltage, and outputs a high level or low level signal to the set circuit 22 depending on the level. Here, the reference voltage is set to an intermediate value that makes the difference between the output voltages of the reading card and the reading/writing card equal as shown in FIG. In this embodiment, as shown in Figure 1, the reflectance of the reading card is higher than the reflectance of the reading/writing card.

The level adjustment section 3 includes a voltage dividing circuit 30 that changes the level of the output signal of the light receiving 102 of the optical head 11, and a voltage dividing circuit 3
A changeover switch 31t for switching 0 is provided.

The voltage dividing circuit 30 is provided by branching a signal line that transmits the output signal of the light receiving section D2 of the optical helad 11 to the reading device 4, and sets the level of the output signal of the light receiving section D2 to a predetermined value using a variable resistor VR2. Set.

The changeover switch 31 is for selecting whether to input the output signal of the light receiving section D2 directly to the reading device 4 or to input it to the reading device 4 via the voltage dividing circuit 30.
The above switching is performed by the output of the set circuit 22.

In this embodiment, the voltage dividing circuit 30 is used to change the level of the output signal, but a dividing circuit or the like may be used instead.

Next, the operation of this embodiment configured as described above will be explained.

When the optical memory card 5 is inserted in the direction of the arrow, a load signal is output from the reading device δ4, and the feed roller 12b rotates to feed the optical memory card 5 onto the table 12a.

Further, when the optical memory card 5 is attached, an initial setting signal is output from the reading device 4 to the set circuit 22, and the set circuit 22 is placed in a set state. This initialization signal is.

It is output under program control in the reading device 4.

At this time, since the optical sensor 10 and the optical memory card 5 are placed facing each other, the light from the light emitting section Ct is reflected by the optical storage area of the optical memory card 5 and is received by the light receiving section C2. The output of the light receiving section C2 is amplified by the amplifier 20 and sent to the comparator 2.
1, a comparison with a reference voltage is made.

When the installed optical memory card 5 is a reading card with high reflectance, a high-level output signal is output from the humpator 21, so that the output Q of the set circuit 22 becomes high, and the selector switch 31 of the level adjustment section 3 is output. Switch to the short circuit side.

Then, the changeover switch 31 adjusts the level of the read signal output from the light receiving section D2 of the optical helad 11 to a level for reading the read card.

Furthermore, if the installed optical memory card 5 is a read/write card with low reflectance, the output of the comparator 21 is at a low level, so the output Q of the set circuit 22 is at a low level, and the selector switch 31 is connected to the voltage dividing circuit 30. Switch to the side.

Therefore, in this case, the level of the read signal is adjusted by the changeover switch 31 to a level for reading the read/write card.

Also, the level of the adjusted read signal is determined by the read device r1.
4 to the set circuit 22, the initial setting signal is held until the end of reading data from the optical memory card 5 or until the optical memory card 5 is ejected.

In addition, in the above embodiment, the level of the read signal is maintained by
Although this is done using an initial setting signal outputted under program control of the reading device 4, an initial setting circuit 6 may be provided which uses a sensor to identify the position of the optical memory card 5 and outputs an initial setting signal.

The circuit configuration in that case is shown in FIG.
Position sensors 13 and 14 are installed before and after the feed roller 12b.
will be provided.

The initial setting circuit 6 includes an AND circuit 23 and a NAND circuit 2.
5 and a flip-flop 26, and the outputs of the position sensors 13 and 14 are connected to an AND circuit 23.5 and a flip-flop 26, respectively. It is connected to each input of the NAND circuit 25.

The card identification section 2 is provided with a set circuit 2 which calculates the logical sum of the output of the comparator 21 and the output of the flip-flop 26.
2 is provided.

Note that the other configurations are the same as the embodiment shown in FIG.

Next, the operation of the initial setting circuit 6 will be explained.

When the optical memory card 5 is inserted to the position t of the position sensor 13, the light from the first light emitting section AI is blocked and the light receiving section A2 is turned off.
, because the light receiving part B2 of the position sensor 14 is ON, NAND
A reset signal is output from the circuit 25, putting the flip-flop 26 and the set circuit 22 into a reset state.

When the optical memory card 5 advances and is placed on the table 12a, the optical memory card 5 separates from the position sensor 13, the light receiving part A2 is turned on, and the light receiving part B2 of the position sensor 14 is turned off. At this time, a loaded signal indicating the end of loading is output from the AND circuit 23, and the flip-flop 26 is set.

As a result, the output Q of the 2-flip flow 7 flip 26 becomes high level and is sent to the AND circuit 24. And A
The ND circuit 24 performs a logical sum with the output of the comparator 21 to set the save circuit 22 in a set state. Therefore, this state will be maintained until the output Q of the flip-flop 26 becomes low level, that is, until the optical memory card 5 is ejected.

In the above embodiment, the reflectance of the optical storage area of the optical memory card 5 is detected to identify the reading card and the reading/writing card. However, as shown in FIG. A detection mark 7 is provided in a part other than the area to indicate that the card is a reading card or a reading/writing card with a higher reflectance than the surrounding area, and the presence or absence of this detection mark 7 is detected by a reflective optical sensor 10, thereby creating an optical memory. It is also possible to identify the type of card 5 and adjust the level. The detection mark 7 can be formed not only with a higher reflectance than the surroundings as described above, but also with a lower reflectance than the surroundings (as a non-reflective portion).

Regarding the output voltage of the optical sensor 10, in the case of the detection mark 7 with high reflectance, the output voltage level of the optical sensor 10 is higher in the part where the detection mark 7 is located than in other parts, and in the case of the detection mark 7 with low reflectance. , the level will be lower than other parts.

When a transmissive type sensor is used as the optical sensor 10 and the portion of the optical memory card 5 other than the detection mark 7 is made transparent, the output voltage of the optical sensor 10 where the detection mark 7 is present is higher than where there is no detection mark 7. It will be at a low level.

The configuration when using a transmission type optical sensor is shown in Fig. 6.
Here, an identification hole 8 is provided in the optical memory card 5 instead of the detection mark 7, and the type of the optical memory card 5 is identified by a transmission type sensor. In this case, the optical sensor 10
The output voltage is at a higher level in some parts of the identification hole 8 than in other parts.

Further, by providing the detection mark 7 or the identification hole 8 as described above, it is possible to obtain the effect that when handling the optical memory card 5, it is possible to visually determine whether the optical memory card 5 is a reading card or a reading/writing card.

In addition, the card reading section l, the card identification section 2 and the level r
The circuit configuration of section Ii 3 can be modified in various ways and is not limited to what is illustrated.

[Effect of the Invention J As explained above, the optical memory card reading system of the present invention uses a plurality of types of optical memory cards as optical memory cards, forms the optical storage areas of the optical memory cards in the same format, and improves the optical readability of the optical memory cards. By having a card identification section that detects the characteristics with an optical sensor and identifies the type of optical memory card, it has the effect that the data of the reading card and the reading/writing card can be read by the same device without changing the circuit. .

A reflective mark or an identification hole is provided on one of the reading card and the reading/writing card among the optical memory cards, and the presence or absence of the detection mark or identification hole is detected by an optical sensor of the card identification section to perform card identification. For example, it is possible to visually distinguish between a reading card and a reading/writing card.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. tfSZ diagram is a diagram showing the output voltage of the optical sensor, FIG. 3 is a block diagram showing another embodiment of the present invention, FIG. 4(a) is a diagram showing the format of the reading card, FIG. 4(b) 5 is a diagram showing the format of a read/write card, FIG. 5 is a diagram showing the other side of the optical memory card, and FIG. 6 is a diagram showing a 4R configuration of a transmission type optical sensor. 2 card reading section 2 2 card identification section 3 Nilepel adjustment section 5: Optical memory card 8: Identification hole 1O: Optical sensor 30: Voltage dividing circuit Co., Ltd. 4: Reading device 7: Detection mark 11: Optical head 21: Comparator 31: Changeover switch SiniSky AMP/l output voltage diagram (a) / (b) diagram diagram

Claims (4)

[Claims] (1) In an optical memory card reading system that reads data written on an optical memory card using an optical head using light, multiple types of optical memory cards are used as the optical memory card, and the format of the optical storage area of each optical memory card is the same. Detect the optical characteristics of the optical memory card with an optical sensor,
It has a card identification section that identifies the type of optical memory card, and it has a level adjustment section that adjusts the level of the read signal output from the optical head according to the type of the optical memory card based on the identification signal from the card identification section. An optical memory card reading system featuring: (2) A reading card and a reading/writing card are used as multiple types of optical memory cards, and one part of the optical memory card is provided with a detection mark that has a different reflectance from the other part, and the presence or absence of the detection mark is detected by the card identification part. Claim (1) characterized in that card identification is performed by detection with a reflective optical sensor.
The optical memory card reading system described. (3) A reading card and a reading/writing card are used as multiple types of optical memory cards, an identification hole is provided on one side, and the presence or absence of the identification hole is detected by a transmission type optical sensor of the card identification section,
The optical memory card reading system according to claim 1, wherein the optical memory card reading system performs card identification. (4) The level adjustment section includes a voltage divider circuit or a shunt circuit that changes the level of the read signal output from the optical head, and a changeover switch that switches the voltage divider circuit or shunt circuit, and the card identification section includes an optical The optical memory card reading system according to claim 1, further comprising a set circuit that operates the changeover switch depending on the type of optical memory card detected by the sensor.