TWI709040B - Identification signal generation device and replaceable electronic device with function of identification signal generation - Google Patents

Abstract

An identification signal generation device comprises an input/output circuit, a detection circuit and a central processor, with the central processor electrically connected with the input/output circuit and the detection circuit. The input/output circuit is configured to receive a enable signal including a power signal at least. The detection circuit is configured to detect an electrical response signal of a detected device in response to the enable signal. The central processor is configured to obtain the electrical response signal of the detected device through the detection circuit, to convert the electrical response signal into an identification signal based on an identification signal conversion formula, to control the detection circuit according to the identification signal, and to output the identification signal through the input/output circuit.

Description

Identification signal generating device and replaceable electronic device with identification signal generating function

The present invention relates to an identification signal generating device, and particularly relates to an identification signal generating device installed in a replaceable electronic device.

Nowadays, consumable components in many electronic devices are designed to be replaceable, such as ink cartridges in printers, light bulbs in projectors, and so on. Generally speaking, in order to ensure that the consumables replaced by users belong to their own brand and not counterfeit consumables of other brands, manufacturers will design the consumables as encrypted products, so that the host can identify the newly installed consumables before operation. .

However, most of the encryption products in the current market are connected to the host through a three-wire, four-wire or more line architecture, and this architecture includes two basic power cords for power supply, plus the encryption code The signal line of the product identification process. The above-mentioned architecture not only has the problems of complicated circuit and high manufacturing cost, but also because of the complicated circuit, the ease of use in installation is lower than that of general products without encryption codes.

In view of the above, the present invention provides an identification signal generation device and a replaceable electronic device with an identification signal generation function.

An identification signal generating device according to an embodiment of the present invention includes an input/output circuit, a detection circuit, and a central processing unit, wherein the central processing unit is electrically connected to the input/output circuit and the detection circuit. The input and output circuit is used to receive the driving signal. The detection circuit is used for detecting the response electrical signal of a device under test to the driving signal. The central processing unit is used to be driven by the driving signal to obtain the response signal of the device under test through the detection circuit, convert the response signal into the identification signal according to the identification signal conversion formula, and control the detection circuit according to the identification signal and output it through the input and output circuit Identify the signal.

A replaceable electronic device with an identification signal generation function according to an embodiment of the present invention includes an input and output circuit, a load element, a detection circuit, and a central processing unit, wherein the load element is electrically connected to the detection circuit and the central processing unit The device is electrically connected to the input/output circuit and the detection circuit. The input and output circuit is used to receive the driving signal. The load element is used to be driven by the power signal and generate a response electrical signal to the driving signal. The detection circuit is used for detecting the response signal. The central processing unit is used to be driven by the driving signal to obtain the response signal through the detection circuit, convert the response signal into the identification signal according to the identification signal conversion formula, and control the detection circuit according to the identification signal and output the identification signal through the input and output circuit.

With the above structure, the identification signal generation device and the replaceable electronic device with identification signal generation function disclosed in this case can receive the driving signal including at least the power signal from the host through the power line, and according to the device under test (load component) The response signal generates an identification signal, and then sends the identification signal back to the host via the power cord, thereby reducing the complexity and cost of the circuit configuration.

The above description of the content of the disclosure and the description of the following embodiments are used to demonstrate and explain the spirit and principle of the present invention, and to provide a further explanation of the patent application scope of the present invention.

The detailed features and advantages of the present invention are described in detail in the following embodiments, and the content is sufficient to enable anyone familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this specification, the scope of patent application and the drawings Anyone who is familiar with the relevant art can easily understand the related purpose and advantages of the present invention. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention by any viewpoint.

The identification signal generating device provided in one or more embodiments of the present invention is used to generate an identification signal associated with a replaceable electronic device for the host to determine whether the replaceable electronic device matches the host. Furthermore, the replaceable electronic device is, for example, a light bulb in a projector. The identification signal generating device proposed in the following embodiments of the present invention can be connected between the projector and the light bulb to generate identification signals based on the electrical signal of the light bulb. This is for the projector to determine whether the lamp is a conforming manufacturer. Among them, the identification signal generating device can be designed to be included in the circuit of the replaceable electronic device, or it can be installed separately from the replaceable electronic device.

Please refer to FIG. 1. FIG. 1 is a functional block diagram of an identification signal generating apparatus according to an embodiment of the present invention. As shown in FIG. 1, the identification signal generating device 1 includes an input and output circuit 11, a detection circuit 13 and a central processing unit 15, wherein the central processing unit 15 is electrically connected to the input and output circuit 11 and the detection circuit 13.

The input/output circuit 11 is, for example, a power cord, which is used to connect to the host 2 that performs identification and provides power to receive a driving signal from the host 2, where the driving signal at least includes a power signal (for example, a constant current DC signal). In another embodiment, in addition to the power signal, the drive signal may also include an identification request signal. The identification request signal is, for example, a series of digital codes, and the DC power signal is used as the carrier wave, so that when the power line transmits the power signal, It can also transmit additional identification request signals at the same time.

The detection circuit 13 is used to connect to the device under test 3 to provide the drive signal to the device under test 3 and to detect the response electrical signal of the device under test 3 to the drive signal. Wherein, the response electrical signal corresponds to the aforementioned driving signal. For example, in an example where the driving signal contains only a DC signal, the response signal can be an electrical signal such as voltage and current; in an example where the drive signal contains a DC signal and a digital code, the response signal can be the device under test 3 Another direct current signal and another digital code generated when the drive signal is received. The device under test 3 is a replaceable electronic device matched with the host 2 and can be driven by the power signal from the host 2 to operate. As mentioned above, the host 2 and the device under test 3 are, for example, a projector and a light bulb, respectively. The detailed circuit structure of the input/output circuit 11 and the detection circuit 13 will be described later.

The central processing unit 15 is, for example, a central processing unit (CPU), a microcontroller, a field programmable gate array, a special application integrated circuit, or other processors. The central processing unit 15 can receive the driving signal through the input/output circuit 11 and is driven by the driving signal to obtain the response electrical signal of the device under test 3 through the detection circuit 13. The central processing unit 15 converts the response electrical signal into an identification signal according to the identification signal conversion formula, controls the detection circuit 13 according to the identification signal, and outputs the identification signal through the input/output circuit 11. Among them, the identification signal conversion type can be stored in the internal memory of the central processing unit 15, or stored in an external memory provided independently of the central processing unit 15 and electrically connected to each other, such as flash memory and read-only memory. , Magnetic memory or other non-volatile storage media.

As mentioned above, the driving signal may only include the power signal or include the power signal and the identification request signal. In the embodiment where the driving signal only includes the power signal, the central processing unit 15 will be driven by the power signal through the detection circuit 13 to obtain the response signal of the device under test 3 to the power signal, and convert the power signal into According to the identification signal, the detection circuit 13 is controlled according to the identification signal and the identification signal is output through the input/output circuit 11. On the other hand, in an embodiment where the driving signal includes a power signal and an identification request signal, the CPU 15 will be driven by the power signal through the detection circuit 13 to obtain the response signal of the device under test 3 to the power signal and the identification request signal. , Convert the power signal into an identification signal according to the identification signal conversion type, and then control the detection circuit 13 according to the identification signal and output the identification signal through the input/output circuit 11. In this embodiment, when there are multiple identification signal conversion types stored in the internal memory of the central processing unit 15 or independent external memory, the identification request signal may include the information of the identification signal conversion type to be used. The device 15 can select which identification signal conversion method to use accordingly.

The host 2 can obtain the identification signal through the input/output circuit 11 to determine whether the device under test 3 matches the host 2, for example, belongs to the same brand or a sub-brand with compatible specifications. For example, if the matching identification signal is stored in the host 2, the host 2 can determine whether the device under test 3 matches the host 2 by determining whether the identification signal returned by the self-identification signal generating device 1 and the matching identification signal are the same The above identification signal identification mechanism is an exemplary description, and the present invention is not limited. When the host computer 2 determines that the device under test 3 matches it, it will start its general operation function. Taking the projector as an example, the projector will start the projection function when it determines that the installed bulb matches it through the above mechanism. In other embodiments, the processor of the host 2 can perform the above-mentioned identification on multiple devices under test.

In one embodiment, the identification signal generating device 1 may perform multiple identification signal generations for the host 2 to recognize the device under test 3 multiple times. When the central processing unit 15 receives the first drive signal, it can convert the response electrical signal of the device under test 3 into the first identification signal according to the first identification signal conversion formula, and when it receives the second drive signal, according to the second identification signal The identification signal conversion method converts the response signal into a second identification signal. Wherein, the first driving signal may only include a power signal or a power signal and an identification request signal, and the second driving signal may also only include a power signal or a power signal and an identification request signal.

Through different identification signal conversion formulas, identification signals with different signal characteristics can be generated, and the electrical characteristics include one or more of amplitude characteristics, frequency characteristics, phase characteristics, waveform characteristics, and analog-digital characteristics. For example, different analog and digital characteristics may mean that the identification signals generated in multiple identification generations are analog signals and digital signals, or identification signals with different digital codes.

Furthermore, the host 2 can send the identification request signal to the identification signal generating device 1 multiple times at a preset frequency, and the central processing unit 15 can generate the identification signal according to different identification signal conversion formulas each time it receives the identification request signal. . Wherein, the CPU 15 can store the use sequence of the identification signal conversion formula and record the event of receiving the identification request signal, so as to determine the applicable identification signal conversion formula when the identification request signal is received next time; or, the central processing unit 15 15 can store a lookup table for the identification signal conversion, and the identification request signal transmitted by the host 2 can include the applicable identification signal conversion code. The central processing unit 15 can self-lookup the table by analyzing the code in the identification request signal Find the corresponding identification signal conversion formula.

By generating different identification signals with different conversion modes for the host 2 to perform multiple identifications, it is possible to prevent a single conversion mode from being cracked and causing the counterfeit of the replaceable electronic device to be recognized by the host 2.

To further describe the circuit of the identification signal generating device 1, please refer to FIG. 1 and FIG. 2. FIG. 2 is a circuit diagram of the identification signal generating device 1 according to an embodiment of the present invention. The input/output circuit 11 of the identification signal generating device 1 may include a booster circuit 111. The boost circuit 111 is used to adjust the power signal from the host 2 to make it meet the voltage specification of the central processing unit 15, and then transmit the adjusted power signal to the central processing unit 15.

As shown in FIG. 2, the detection circuit 13 may include a transistor M1 and a resistor R1. In this embodiment, after being activated by the power signal, the central processing unit 15 controls the transistor M1 to turn on, and uses the resistor R1 to read the current value of the device under test 3. Among them, the resistance R1 can also be used as a part of the circuit in the device 3 under test. The central processing unit 15 converts the read current value into a voltage value, and then uses the D/A converter of the central processing unit 15 to perform the conversion method as described in the previous embodiment to generate an identification signal (for example, another voltage value). ). The central processing unit 15 then controls the transistor M1 through the operational amplifier to make it non-conducting, so that the upper and lower wires of the detection circuit 13 and the upper and lower wires of the input and output circuit 11 (ie, power lines) in the figure are regulated to correspond to the identification signal The voltage value of, for the host 2 to read to perform identification.

FIG. 2 exemplarily shows the circuit configuration of the booster circuit 111 and the detection circuit 13, wherein the booster circuit 111 is a selective circuit. Those with ordinary knowledge in the field of the present invention can design and modify the detailed circuit configuration of the booster circuit 111 or the detection circuit 13 according to actual needs, and the present invention is not limited.

As mentioned above, the identification signal generating device 1 can be designed to be included in the circuit of a replaceable electronic device. Please refer to FIG. 3, which is a functional block diagram of a replaceable electronic device 5 with an identification signal generation function according to an embodiment of the present invention. As shown in FIG. 3, the replaceable electronic device 5 includes an input/output circuit 51, a load element 52, a detection circuit 53, and a central processing unit 55. The load element 52 is electrically connected to the detection circuit 53, and the central processing unit 55 It is electrically connected to the input and output circuit 51 and the detection circuit 53. The operation and circuit configuration of the input and output circuit 51, the detection circuit 53, and the central processing unit 55 are the same as those of the input and output circuit 11, the detection circuit 13 and the central processing unit 15 in the previous embodiment, so they will not be repeated here. . The load element 52 may be an electronic element or circuit combination in the replaceable electronic device 5 that performs the operation function of the replaceable electronic device 5. For example, the load element 52 can be a light-emitting element in a bulb of a projector or a circuit. The operational relationship between the load component 52 and other components/circuits in the replaceable electronic device 5 is the same as the operational relationship between the device under test 3 and other components/circuits in the previous embodiment, and will not be repeated here.

With the above structure, the identification signal generation device and the replaceable electronic device with identification signal generation function disclosed in this case can receive the driving signal including at least the power signal from the host through the power line, and according to the device under test (load component) The response signal generates an identification signal, and then sends the identification signal back to the host via the power cord, thereby reducing the complexity and cost of the circuit configuration. In addition, the identification signal generation device and the replaceable electronic device with identification signal generation function disclosed in this case can also pre-store multiple identification signal conversion methods to prevent a single conversion method from being cracked and the counterfeit of the replaceable electronic device can pass through the host The status of identification.

Although the present invention is disclosed in the foregoing embodiments, it is not intended to limit the present invention. All changes and modifications made without departing from the spirit and scope of the present invention fall within the scope of patent protection of the present invention. For the scope of protection defined by the present invention, please refer to the attached patent scope.

1 Identification signal generation device 2 Host 3 Device under test 5 Replaceable electronic devices 11.51 Input and output circuit 13, 53 Detection circuit 15.55 Central Processing Unit 111 Boost circuit 52 Load components M1 Transistor R1 Resistance

FIG. 1 is a functional block diagram of an identification signal generating device according to an embodiment of the invention. FIG. 2 is a schematic circuit diagram of an identification signal generating device according to an embodiment of the invention. FIG. 3 is a functional block diagram of a replaceable electronic device with an identification signal generation function according to an embodiment of the present invention.

1 Identification signal generation device 2 Host 3 Device under test 11 Input and output circuit 13 Detecting circuit 15 Central Processing Unit

Claims (6)

An identification signal generating device includes: an input/output circuit for receiving a driving signal, the driving signal at least including a power signal; a detection circuit for detecting a response signal of a device under test to the driving signal And a central processing unit electrically connected to the input/output circuit and the detection circuit for being driven by the drive signal to obtain the response signal of the device under test through the detection circuit, based on an identification signal The conversion method converts the response electrical signal into an identification signal, and controls the detection circuit according to the identification signal and outputs the identification signal through the input and output circuit; wherein the drive signal is used as a first drive signal, and the power signal is used as a The first power signal, the response signal is used as a first response signal, the identification signal conversion type is used as a first identification signal conversion type, the identification signal is used as a first identification signal, and the input/output circuit is further used for receiving a A second drive signal, the second drive signal includes a second power signal and an identification request signal, the detection circuit is further used to detect a second response signal of the device under test to the second drive signal, and The central processing unit is further used to be activated by the second power signal, and to select a second identification signal according to the identification request signal. Convert the second response signal into a second identification signal, and output the second identification signal through the input/output circuit; wherein the first identification signal and the second identification signal have different signal characteristics, and the signal characteristics It includes one or more of amplitude characteristics, frequency characteristics, phase characteristics, waveform characteristics, and analog and digital characteristics. The identification signal generating device according to claim 1, wherein the first driving signal further includes another identification request signal, the other identification request signal uses the first power signal as a carrier, and the CPU is used to receive the first power signal. A power signal is activated, and the first identification signal conversion method is selected according to the other identification request signal. The identification signal generating device according to claim 1, wherein the input and output circuit includes a boost circuit for adjusting the voltage of the first power signal to meet the voltage specification of the CPU. A replaceable electronic device with an identification signal generation function, comprising: an input and output circuit for receiving a driving signal, the driving signal at least including a power signal; a load element for being driven by the power signal, and The driving signal generates a response signal; A detection circuit, electrically connected to the load element, and used for detecting the response electrical signal; and a central processing unit, electrically connected to the input/output circuit and the detection circuit, for being driven by the driving signal To obtain the response electrical signal of the device under test through the detection circuit, convert the response electrical signal into the identification signal according to an identification signal conversion formula, and control the detection circuit according to the identification signal and pass the input and output circuit Output the identification signal; wherein the drive signal is used as a first drive signal, the power signal is used as a first power signal, the response signal is used as a first response signal, and the identification signal conversion type is used as a first identification signal conversion In the formula, the identification signal is used as a first identification signal, the input and output circuit is further used for receiving a second drive signal, the second drive signal includes a second power signal and an identification request signal, and the detection circuit is further used for Detecting a second response signal of the device under test to the second driving signal, and the central processing unit is further used for being activated by the second power signal, and selecting a second identification signal conversion based on the identification request signal Convert the second response signal into a second identification signal, and output the second identification signal through the input/output circuit; The first identification signal and the second identification signal have different electrical characteristics, and the electrical characteristics include one or more of amplitude characteristics, frequency characteristics, phase characteristics, waveform characteristics, and analog-digital characteristics. The replaceable electronic device according to claim 4, wherein the first driving signal further includes another identification request signal, the other identification request signal uses the first power signal as a carrier, and the central processing unit is used to receive the The first power signal is activated, and the first identification signal conversion method is selected according to the other identification request signal. The replaceable electronic device according to claim 4, wherein the input/output circuit includes a boost circuit for adjusting the voltage of the first power signal to meet the voltage specification of the CPU.

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