TW580432B - Apparatus and method for determining an identification circuit state of ink jet print head - Google Patents

Abstract

An apparatus and a method for determining an identification circuit state of ink jet print head, the apparatus is suitable for the ink jet print head which provides plurality of clock pulse signal. The apparatus includes a state input end, a first burned end, the second burned end, and a switch circuit. At first, the switch circuit under the control of the clock pulse signal and conducts an applied voltage. Thereupon uses the applied voltage to program the first programmable switch and the second programmable switch. The first and the second programmable switch can control an electrical property coupling relationship among the first and the second burned end and the state input end. Lean on this way to turn off one between the first and the second programmable switch.

Description

580432 V. Description of the invention (1) The technical field to which the invention belongs The present invention relates to an inkjet print head (Ink J et Print Head) device, and in particular to a method for determining the identification and detection of an inkjet print head. Techniques for measuring circuit status. Previous technology With the rise of the information industry, various computer peripheral products are catering to the new technology, and therefore they are rapidly changing. Taking inkjet printers as an example, in order to allow users to request different print quality, a variety of inkjet printers have been produced, and each type of inkjet printer has A variety of inkjet print heads dedicated to it. The function of an inkjet print head is to eject ink from a nozzle to form ink droplets. It can be divided into continuous reading and intermittent jetting according to the jetting method. In order to match the different jetting principles, its structure + is different, so there are inkjet print heads with black or color cassettes, or It is an inkjet print head with a different number of orifices and so on. In order to identify various types of inkjet print heads, during the manufacturing process, an identification code corresponding to the model or serial number is burned in each type of inkjet print head. With this step, when using different types of inkjet print heads, the inkjet printer can identify them and use the corresponding control program to perform printing functions. As mentioned above, there are so many types of inkjet printheads. In order for an inkjet printer to recognize the type of inkjet printhead it is equipped with, it is necessary to store the corresponding model or serial number in the inkjet printhead. ID. Therefore, each inkjet print head needs to include an identification detection circuit 〇 (Identification Circuit), which is used to provide an inkjet printer to read

11749t.wf. Pt d page 7 580432 V. Description of the invention (2) The identification code stored in the inkjet print head is used to identify the type of the inkjet print head. The inkjet printhead identification detection circuit is used only when the inkjet printhead is first installed in the inkjet printer. Once the inkjet printhead is identified, it is no longer needed Identify the detection circuit. Therefore, the identification detection circuit of the inkjet print head usually borrows the signal line that controls the print head array (Pr i n t H e a d A r a y) circuit to read the identification code stored in the inkjet 歹 ij print head. SUMMARY OF THE INVENTION The present invention provides a device for determining the status of an identification and detection circuit of an inkjet print head, which can obtain bit data of a complete identification code as needed, and is not limited by the number of signal lines. The device is suitable for an inkjet print head having a plurality of signal lines, including a status output terminal, first and second programming terminals, and a switch circuit. Among them, the status output terminal is used to output unit metadata of the status of the inkjet print head identification and detection circuit. The first programming terminal is electrically connected to the state output terminal through a first programmable switch, and the second programming terminal is electrically connected to the state output terminal through a second programmable switch. The switch circuit is used to conduct an external power supply to program the first and second programmable switches according to the control of the signal line. In addition, the above-mentioned switching circuit includes first and second transistors. Among them, the first transistor is determined according to the first signal line in the above signal line, and the second transistor is based on a second signal line in the signal line transmitted when the first transistor is turned on. Potential to determine whether to apply external power to the first and second programmable switches. First signal line

11749twf.ptd Page 8 580432 V. Description of the invention (3) The second signal line and the second signal line can be the same signal line or different signal lines. The first and second stylized switches mentioned in the present invention include a fuse or a low-power resistor, so as to sequentially store the bit data 0 or 1 to be loaded. The inkjet print head can output the corresponding identification code. The invention provides another device for determining the status of the inkjet print head recognition detection circuit. In this device, in addition to the foregoing status output terminal, the first and second programming terminals, and the switch circuit, a status can be included. Input circuit. In this state, the input circuit is controlled by the signal line, a power source is turned on, and it is transmitted to the third programming terminal. This status input circuit includes a third transistor and a fourth transistor. Among them, the third transistor determines whether to conduct according to one of the ten signal lines of the signal line; the fourth transistor determines whether to conduct according to the potential of a fourth signal line transmitted when the third transistor is turned on. Power and transfer it to the third programming terminal. The third signal line and the fourth signal line may be the same signal line or different signal lines, and the third signal line, the fourth signal line, the first signal line, and the second signal line may be the same signal line. , Or different signal lines. In accordance with the spirit of the present invention, the present invention provides a method for determining the status of an inkjet printhead identification detection circuit, which is suitable for an inkjet printhead having a plurality of signal lines. First, the two signal lines in the enable signal line are used to conduct an external power supply. Next, the first and second stylized switches are programmed with an external power supply, and the first and second stylized switches are electrically connected to different potentials. This step can blow the fuse or low power resistor of one of the first and second stylized switches. Among them, when the inkjet print head works normally, these signal lines will not be enabled at the same time.

1 1749t.wf. Ptd 苐 Page 9 580432 V. Description of the invention (4) In accordance with the spirit of the present invention, the present invention further provides a method for determining the status of an inkjet print head recognition detection circuit, which is applicable to a plurality of signal lines. Inkjet print head. First, the two signal lines in the enable signal line are used to conduct an external power supply. Next, the first and second stylized switches are programmed with an additional power supply, and the first and second stylized switches are electrically connected to different potentials: the second programming terminal connected to the second stylized switch is grounded. , The third programming terminal connected to the first stylized gate is floated to blow the second stylized switch; if the first stylized switch is to be blown, the other two signal lines in the enabled signal line will be connected to the first The second programming terminal of the two stylized switches is floated, and the third programming terminal of the first stylized switch is connected to ground. The present invention uses a pair of fuses or a low-power resistor of about 0.3 W or less, Or one of them is a fuse and the other is a low-power electrical resistance of about 0.3 W or less. One of them is blown or retained, so that the status output terminal can output unit metadata of either 1 or 0 and accept it. The signal line control decides which fuse will be retained if it is blown, and accepts the input of external power to fuse the fuse. A programmable inkjet print head is designed to identify the status of the detection circuit. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings as follows: Embodiments: The present invention will be described in detail. Prior to this technology, in order to make those familiar with this technology more easily understand the spirit of this case, we hereby briefly explain the overall structure of the current inkjet print head. Please refer to Figure 1, which shows an inkjet

11749twf.ptd Page 10 580432 V. Description of the invention (5) Block diagram of the printer identification system. As shown in the figure, the inkjet printer identification system includes a signal line 1 3 3 and a temperature sensing output line 1 3 6 connected, a J printer circuit (Printer Electronics) 110 and a print head circuit (Print Head Electronics) 120. Among them, the printer circuit 110 includes 4 controllers 113 and the driving circuit 1 1 6, and the print head circuit 1 2 0 I [including the print head array (P rint H ead

Array) 1 2 3. Identification detection circuit 1 2 6 and temperature sensing circuit 1 2 9. In the known technology, the above-mentioned identification detection circuit 1 2 6 can be disclosed in FIG. 2 as disclosed in a US Pat. No. 5 3 6 3 1 3 4 identification detection circuit diagram. As shown in FIG. 2, the identification detection circuit 2 0 0 uses a plurality of fuses (F use) F 1 to F 1 3 respectively corresponding to the gates of a plurality of transistors Q 1 to Q 1 3 to control Whether to turn on the crystals Q 1 to Q 1 3. Among them, the identification code of the inkjet print head type of the φ identification detection circuit 2 0 0 is stored by the programmed fuses F 1 to F 1 3, and each fuse F 1 to F 1 3 is cut off and No, the unit metadata for the identifier. For example, suppose a high-level read control signal is sent via A 1 3. When the fuse F 1 3 is not cut, the transistor Q 1 3 will be turned on, so the temperature sensing output line 1 3 6 will be turned on. Pull to the low level, and read the unit metadata of 0. However, if the fuse F 1 3 is blown, the transistor Q 1 3 will not be turned on, and the temperature sensing output line 1 3 6 will be affected by the pull-up resistance of the printer circuit 1 1 0 (not under (Pictured in the figure) It is pulled up to a high level, so the unit metadata of 1 can be read out, and other bits can be read out in the same manner as described above. However, each signal line of such an identification detection circuit can only read the identification code of a unit cell, so the number of bits of the identification code that can be stored will be limited by the increase in the number of signal lines.

11749twf.ptd Page 11 580432 V. Description of the Invention (6) In order to solve the above problem, please refer to another type of identification and detection circuit disclosed in US Patent No. 5 9400 0 95 as shown in Fig. 3. This identification detection circuit 3 0 0 is mainly implemented by using a plurality of unit cell mask-type programmable shift registers (One-Bit Mask Programmed Shift Register) 320a, 32〇b, 32〇c, and 320d. Parallel In, Serial Out Identification C ircuit. When the printer circuit 1 1 0 transmits the load control signal Load via the signal line 3 0 5, the identification code of the memory will be loaded into the plurality of unit shift registers 3 2 0 a, 3 2 0 b, 3 In 2 0 c and 3 2 0 d, these shift registers are dynamic shift registers (Dynamic Shift Register), and their operation mode is to receive sequentially through the signal lines 3 1 0 and 3 1 5 When a first clock signal CLK 1 and a second clock signal CLK 2 are used, the bit data stored in the unit cell shift register 3 2 0 d will be removed through the output line 3 3 0 and stored in the unit. The bit data in the meta shift register 3 2 0 c is shifted into the unit meta shift register 3 2 0 d, and the bit data stored in the unit shift register 3 2 0 b is shifted in The unit cell shift register 3 2 0 c, and the bit data stored in the unit cell shift register 3 2 0 a are shifted into the unit cell shift register 3 2 0 b. Next, the printer circuit 1 10 transmits the load control signal Loa through the signal line 3 0 5 and sequentially transmits the required first clock signal CLK through the signal lines 3 1 0 and 3 1 5 After 1 and the second clock signal CLK2, the identification codes stored in the plurality of unit cell shift registers 320a, 320b, 320c, and 320d will be output in series. Therefore, this type of identification detection circuit using in-series and out-of-series 3 0 0 can read the identification code only by three signal lines such as 3 0 5, 3 1 0 and 3 1 5 without being affected by the number of signal lines. Restrictions on multiple fundraising. It must be emphasized that the

11749twf.ptd Page 12 580432 V. Description of the invention (7) The identification circuit is programmable using a photomask. The status of the identification value has been determined when the chip is manufactured, so it cannot be changed flexibly in accordance with actual needs afterwards. . Please refer to FIG. 4, which shows the identification detection circuit of another inkjet print head. As shown in the figure, the identification detection circuit includes a counter 410, an OR logic unit 430 composed of an OR logic gate, and a programming unit 4 2 0 composed of a fuse. The stylized unit 4 2 0 shown in the figure may be implemented by a fuse. The identification and detection circuit 4 2 0 of the inkjet print head only needs to apply the four signal lines of the inkjet printer, including the reset signal line 4 0 for transmitting the reset signal R eset. The first clock signal line 4 _0 of the pulse signal CLK 1 2. The second clock signal line 4 Q 3 that transmits the second clock signal CLK 2 and the identification code signal line 4 0 5 that transmits the identification code ID. Performs the function of identifying the type of the installed inkjet print head. Therefore, the identification detection circuit can expand the number of bits according to the requirements of the identification code, and is not limited by the number of signal lines. The counter 4 1 0 is electrically connected to the reset signal line 4 0 1, the first clock signal line 4 0 2 and the second clock signal line 4 0 3. It uses an 8-bit counter with 8-bit output terminals b 0 to b 7 to match the required number of identification code bits. Each output terminal b 0 ~ b 7 is respectively connected to the input terminal of OR logic unit 430 through the fuse of stylized unit 4 2 0, or each input terminal of logic unit 430 is respectively connected to each of the stylized unit 4 2 0 The fuse is electrically connected to the ground terminal. In addition, the OR gate of the OR logic unit 430 may further include an enable control terminal EN for receiving the control of the second clock signal CLK2. Assuming that the identification code to be stored is 1 1 1 0 1 0 0 0, you need to fuse F 1 0, F 1 1

11749twf.ptd Page 13 580432 V. Description of the invention (8) F 1 2, F 3, f 1 4 F 2, F 1 3, F5 F4,

Fl F 6 and F 7 fuses, h 416 and ^ 7 are waiting for you = keep the F0 'unit 420 in the figure to program and store the required identification code' ′ to program the figure 5. For the timing of the operation, please refer to when the counter 4 1 0 resets the signal line 4 0 1 when receiving the tongue%% d, the report contains 4 text reset status or the value of R eset field count state 4 1 0 is broken. After setting it to 0, the output ends b◦ ~ b7, in order, from the first and the second clock. ^ ^ 丨 One brother /: / Λ No. CLK1, CLK2, and sequentially set to high = 1 = V = B0 to b7 in FIG. 5. When the counter 41. = Out of master ^ The output terminal bH7 of W1 is 0_, because the fuse Fa is in the process η, it is reserved. At this time, the output terminal of logic unit 43 0 will output the single material of w. In the same way, when the output terminal 51 of the counter 410 is}, and the other < is 0, the fuse F 1 is retained during programming, so the output terminal of the logical unit 4 3 0 will output unit metadata of 1. . When the output terminal b 2 of the counter 41 is 1 and the others are 0, the fuse ρ 2 is retained during programming, so the output terminal of the logical unit 4 3 0 will output unit metadata of 1. In addition, when the output terminal b 3 of the counter 4 1 is 1 and the others are 0, the fuse ρ 3 has been blown when programming, and the fuse F 3 is reserved, so the output of the OR logic unit 4 3 0 The terminal will output an identification code of 0 丨 D. By analogy, or the output terminal of the logic unit 430 can sequentially output the identification code 11101, which is the identification code corresponding to the installed inkjet print head, and its operation timing can refer to Figure 5 shows the ID.乂 Please refer to Figure 6 'which is another identification circuit of inkjet print head. < As shown in the figure, the identification circuit 700 includes: a counter (cour) ter 71,

H749twf .ptd Page 14 580432 V. Description of the invention (9) · For example, it is a stylized unit composed of a fuse 72 ° and a plurality of switching switches 7 0, 7 31, 7 3 2, 7 3 3, 7 3 4, 7 3 5, 7, 3 6 and 7 3 7. The identification circuit 7 of the inkjet print head also only needs to use the three address lines of the inkjet printer (not shown) as the reset signal line 7 0 1 for transmitting the reset signal Reset. 1. The first clock signal line 7 0 2 transmitting the first clock signal CL k 1 and the second clock signal line 7 0 transmitting the second clock signal CLk 2 to perform identification of the installed inkjet print head The function of the type. Among them, the counter 7 10 is connected to the reset signal line 70, the first clock signal line 702, and the second clock signal line 703. In this embodiment, since the number of bits required for the identification code is 8 bits, an 8-bit counter having 8 output terminals ㈣ ~ b7 is used to match the number of identification code bits required. Each output terminal b 0 ~ b 7 is respectively connected to the switch 7 3 0, 7 3 1, 7 3 2, 7 3 3, 7 3 4, 7 3 5, 7 3 6 and 7 3 7 Extreme, to control the conduction of the switches 7 3 0, 7 3 1, 732, 733, 734, 735, 737, and 737 respectively, and the switches 730, 731, 732, 733, 734, 735, 736, and 737 respectively A source / drain terminal is connected to the power or ground terminal through the fuse of the stylized unit 7 2 0 'in order to input the required identification code through programming, and the switches 730, 731, 732, 733, 734, 735, and 735, One of the 736 and 737 source / drain terminals is connected to the ID signal line 7 0 5 to output the ID. Assuming that the identification code to be stored is 1 1 1 0 1 0 0 0, then F 1 0, F 1 1, F 1 2, F 3, F 1 4, F 5, F 6 and F 7 should be fused. Wait for the fuse link, and keep F0, F1, F2, F13, F4, F15, F16, and F17 in the figure, to program the unit 7 20 And store the required identification code, its operation

11749twf.ptd Page 15 580432 V. Description of the principle of the invention (ίο) Please also refer to the operation timing chart in Figure 5 for a description. When the counter 7 1 0 self-reset signal line 7 0 1 receives the reset signal R e s e t, the count value of the counter 7 1 0 will be reset to 0. When the counter 7 10 sequentially receives a first clock signal CL k 1 and a second clock signal CL k 2 from the first clock signal line 7 02 and the second clock signal line 7 0 3, The counter 7 1 0 will count its count value according to a certain order, such as the order of 1, 2, 4, 8, 16 ... In other words, after the count value of the counter 7 1 0 is reset to 0, the output terminals b 0 to b 7 of the counter 7 1 0 will be sequentially transmitted from the first clock signal line 7 0 2 and the second time. When the pulse signal line 7 0 3 receives a first clock signal CL k 1 and a second clock signal CL k 2, it is sequentially set to the high level 1 in turn, and its operation timing is as bO ~ b7 in FIG. 5. As shown. When the output terminal b 0 of the counter 7 1 0 is 1, the switch 7 3 0 will be turned on, and because the fuse link F 0 is reserved during the programming, the identification code I D of 1 will be output. When the output terminal b 1 of the counter 7 1 0 is 1, the on / off switch 7 3 1 is turned on, and because the fuse link F 1 is retained during the programming, the identification code 1 of 1 is output. Similarly, when the output terminal b 2 of the counter 7 1 0 is 1, the switch 7 3 2 will be turned on, and because the fuse link F 2 is retained during programming, an identification code ID of 1 is also output. When the output terminal b 3 of the counter 7 1 0 is 1, the switch 7 3 3 will be turned on, and because the fuse link F 3 has been blown out when programming, and the fuse link F 1 3 is retained, it will be Output an identification code ID of 0. By analogy, the identification code signal line 7 0 5 will appear sequentially with the identification code ID of 1 1 1 0 1 0 0 0, that is, the identification code representing the inkjet print head installed. For the operation sequence, please refer to Section 5. Shown in the figure ID. [First embodiment]

11749twf.ptd Page 16 580432 V. Description of the invention (11) Please refer to FIG. 7, which shows a circuit device diagram of a unit cell identification detection circuit according to the first preferred embodiment of the present invention. The plurality of signal lines, such as the inkjet print head shown in FIG. 3, include a status output terminal 605, a first programming terminal 601, a second programming terminal 603, and a switch circuit 6. 2 0. Among them, the status output terminal 6 0 5 is used to output the unit metadata of the status of the inkjet print head recognition detection circuit. In practical applications, it can be connected to a bit shift register 3 of FIG. 3 2 0 a, 3 2 0 b, etc. to provide the default outputs of the bit shift registers. The first programming terminal 6 0 1 can be electrically connected to the above-mentioned state output terminal 6 0 5 through the first programmable switch 6 1 0; the second programming terminal 6 0 1 can be connected through the second The programmable switch 6 1 5 is electrically connected to the state output terminal 6 0 5 described above. The switching circuit 6 2 0 can conduct an external power supply P i η according to the control of the signal line to program the first and second + programmable switches 6 1 0 and 6 1 5. The power source P 1 η may be a voltage source or a current source. In a preferred embodiment of the present invention, the above-mentioned switching circuit 6 2 0 includes first and second transistors 6 2 3 and 6 2 6. Among them, the first transistor 6 2 3 will determine whether it is turned on according to the first signal line A η + 1 in the signal line, and the second transistor 6 2 6 will pass the first transistor 6 2 3 when it is turned on. The potential of the second signal line An + 2 determines whether the external power supply P i η is turned on to the first and second programmable switches 6 1 0, 6 1 5. The first and second programmable switches 6 1 0 and 6 1 5 include a fuse device or a low-power resistor. In order to achieve the above-mentioned implementation steps, first, two signal lines in the signal line are enabled at the same time, such as the first and second signal lines A η + 1 and A η + 2 described above, so as to conduct an external force port. Power supply P i η. Next, it is

11749twf.ptd Page 17 580432 V. Description of the invention (12) Utilize additional power supply P i η to program the first and second programmable switches 6 1 0, 6 1 5 'Through this step, the first and second programmable switches 6 Two programmable switches 6 1 0 and 6 1 5 have fuses or low power resistors that are blown, thus cutting off the state output terminal 6 0 5 and one of the first and second state outputs connected to it Electrical channel. The first and second programmable switches 6 1 0 and 6 1 5 are electrically connected to different potentials. The detailed implementation steps can be as follows: If the second programmable switch is to be blown, it will be connected to the second programmable switch. The second programming end of the programmable switch is grounded, and the other end connected to the second programmable switch receives the external power P i η; the first programming end connected to the first programmable switch is floated and connected to The other end of the first programmable switch is used to receive an external power source P i η. At this time, because the second programming terminal is grounded, the fuse at both ends of the second programmable switch due to a voltage difference cuts off the electrical channel between the second programming terminal 603 and the state output terminal to which it is connected. . In the same way, if the first programmable switch is to be blown, the first programming end connected to the first programmable switch is grounded, and the other end connected to the first programmable switch receives the external power source P i η ; The second programming terminal connected to the second programmable 4k switch is floating, and the other terminal connected to the second programmable switch is used to receive the external power P i η. At this time, because the first programming terminal is grounded, the fuse at both ends of the first programmable switch due to a voltage difference cuts off the electrical channel between the first programming terminal 6 0 1 and the state output terminal connected to it. It should be noted that when the inkjet print head is in a working state, the aforementioned first programming terminal is connected to the operating voltage VDD, and the second programming terminal is grounded. If the first programmable switch has been blown, at this time, the output terminal will output the equivalent of a low voltage

11749twf.ptd Page 18 580432 V. The identification code ID of 0 in the description of the invention (13); Conversely, if the second programmable switch has been blown, at this time, the output terminal will output the equivalent of 1 of the high voltage. Identification code ID. [Second Embodiment] The device shown in FIG. 7 for determining the status of the inkjet print head recognition detection circuit is also applicable to the recognition detection circuit of FIG. 6. The first program 4 switch and the second program switch can be regarded as each group of fuses in Figure 6 (F 0 and F 1 0, F 1 and F 1 1, F 2 and F 1 2, F 3 and F 1 3, F 4 and F 1 4, F 5 and F 1 5, F 6 and F 1 6, F 7 and F 1 7). Take the fuses F 7 and F 1 7 as an example, the state output terminal 6 0 5 in Fig. 7 is connected to the logic gate input terminal 6 0 5 ^ in Fig. 6, the first stylized switch is F 7 and the second program Change the switch to F 1 7. Therefore, if one of the fuses is to be blown, the working method is as follows: the two signal lines of the signal Φ line are enabled at the same time, for example, the first and second signal lines A η + 1, A η + 2, so as to turn on an additional Power supply P i η. Next, Bay 1J uses the additional power supply P i η to program the first and second programmable switches 6 1 0, 6 1 5. In this step, the first and second programmable switches 6 1 0 are programmed. The fuse in one of the 6 and 5 is blown, so the electrical channel between the state output terminal 605 and one of the first and second state outputs connected to it is cut off. The first and second programmable switches 6 1 0 and 6 1 5 are electrically connected to different potentials. The detailed implementation steps can be as follows: If the second programmable switch is to be blown, it will be connected to the second programmable switch. The second programming end of the programmable switch is grounded, and the other end connected to the second programmable switch receives the external power P i η; the first programming end connected to the first programmable switch is floated and connected to < · The other end of the first programmable switch is for receiving an external power source P i η. this

11749twf.ptd Page 19 580432 V. In the description of the invention (14), because the second programming end is grounded, the two programmable ends of the second programmable switch are blown because of the voltage difference, so the second programming end is cut off 6 0 3 The electrical channel between the connected status output. In the same way, if the first programmable switch is to be blown, the first programming end connected to the first programmable switch is grounded, and the other end connected to the first programmable switch receives the external power source P i η ; The second programming terminal connected to the second programmable switch is floating, and the other terminal connected to the second programmable switch is used to receive the external power P i η. At this time, because the first programming terminal is grounded, the fuse at both ends of the first programmable switch due to a voltage difference cuts off the electrical channel between the first programming terminal 601 and the state output terminal to which it is connected. When the inkjet print head is in working state, the aforementioned first programming terminal is connected to the operating voltage V D D, and the second programming terminal is grounded. If the first programmable switch has been blown, at this time, the status output terminal will output an identification code ID corresponding to a low voltage of 0; on the contrary, if the second programmable switch has been blown, at this time, the status output The terminal will output an identification code ID corresponding to a high voltage of 1. [Third Embodiment] Next, please refer to FIG. 8A, which shows a circuit diagram of a third preferred embodiment according to the present invention. This circuit can be used when the unit detection circuit of the unit cell is used in the unit cell detection circuit as shown in Fig. 4. The circuit device used in the unit cell identification detection circuit herein further includes a status input circuit 630 compared to the circuit device of the first embodiment. The operating mode of this state input circuit 6 3 0 is controlled according to the signal line An + 3, An + 4 to turn on the external power supply to the third programming terminal.

11749t.wf.ptd Page 20 580432 V. Description of the invention (15) 6 0 7. This state input circuit 6 3 0 includes third and fourth transistors 6 3 3, 6 3 6. Among them, the third transistor 6 3 3 decides whether to turn on according to the third signal line A η + 3 among the signal lines. The fourth transistor 6 3 6 is based on the potential of the fourth signal line A η + 4 transmitted when the third transistor 6 3 3 is turned on to determine whether to apply the external power to the third programming terminal. Among them, the first signal line, the second signal line, the third signal line, and the fourth signal line may be the same signal line or different signal lines. Please refer to Figure 8B, which shows the connection method when the circuit shown in Figure 8A is connected to the identification detection circuit shown in Figure 4. Wherein, the same components are marked with the reference numerals in the original drawings. In order to fuse the first stylized switch and the second stylized switch, the implementation steps are as follows: First, enable two signal lines at the same time, for example, the first and second signal lines An + 1, An + 2 to turn on an external power source P i η. Next, the first and second programmable switches 6 1 0 and 6 1 5 are programmed by using an additional power supply P i η. In this step, the first and second programmable switches 6 1 0, The fuse of one of the 6 1 5 fuses is blown, so the electrical channel between the state output terminal 605 and one of the first and second state outputs connected to it is cut off. The first and second programmable switches 6 1 0 and 6 1 5 are electrically connected to different potentials. The detailed implementation steps can be as follows: If the second programmable switch is to be blown, it will be connected to the second programmable switch. The second programming end 6 0 3 of the programmable switch is grounded, and the other end connected to the second programmable switch receives the external power P i η; connected to the third programming end of the first programmable switch 6 0 7 Floating, and the other end connected to the first programmable switch is used to receive the external power P i η. At this time, because the second programming end 6 0 3 is connected

11749twf.ptd Page 21 580432 V. Description of the invention (16) Ground, make the fuse of the second programmable switch 'fuse' because of the voltage difference, so the second programming terminal 6 0 3 is connected to the state output terminal 6 Electrical channel between 0 and 5. In the same way, if the first programmable switch is to be blown, the third programming terminal 6 7 connected to the first programmable switch is grounded, and the other end connected to the first programmable switch is to receive the external power supply. P i η; the second programming terminal 603 connected to the second programmable switch is floating, and the other terminal connected to the second programmable switch is used to receive the external power source P i η. At this time, the enable signal line A η + 3, A η + 4 is enabled, because the third programming terminal 6 0 7 is grounded, which causes the fuse of both ends of the first programmable switch due to a voltage difference to cut off the third programming terminal. Electrical channel between recording terminal 6 〇7 and its connected state output terminal 60 · 5. It should be noted that when the inkjet print head is in the working state, the aforementioned third + programming terminal is floating. If the first programmable switch has been blown, at this time, the status output terminal will output 0 equivalent to a low voltage. On the contrary, if the second programmable switch has been blown, at this time, the status output terminal 6 0 5 will be electrically connected to the counter output terminal (b 0 ~ b 7), so that the status output terminal signal is accurate. The bits are the same as the counter outputs (b 0 to b 7). What needs to be added here is that when the inkjet print head implements the printing function, there will not be two or more signal lines enabled at the same time. Only when the fuse is burned, the ID code is stored. Only two or more signal lines can be enabled at the same time when they are in action. The invention uses a pair of fuses or low-power resistors, or one of them is a fuse and the other is a low-power resistor to blow, so that the state output terminal 6 0 5 outputs unit metadata of 1 or 0 , Use the signal line to determine

11749 twf.ptd Page 22 580432 V. Description of the invention (17) Which fuse is required to be blown by using the external power supply P i η input to achieve the purpose of blowing the fuse. A programmable identification and detection circuit device designed in this embodiment is characterized in that a signal input is required, a current or voltage required to blow a fuse or a low-power resistor is provided by an external power source P i η, and a potential of a signal line High or low to determine the fuse to be blown. The advantages of the present invention include that the pair of programmable fuses can be simply used, the required identification code ID can be changed, and there is more flexibility in terms of circuit design. Use the original signal cable pins to decide whether to blow the fuse or not. No extra pins are needed, so the complicated production process can be omitted. It is easy to operate by adopting fused fuse-to-fuse method. So the circuit is very conducive to mass production. Those skilled in the art will know that the programmable switch used in the above embodiments can be a low-power resistor with a power of about 0.3 watts or less. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

1 1749t.wf. Ptd Page 23 580432 Brief Description of Drawings Figure 1 is a block diagram of an inkjet printer identification system. FIG. 2 is a circuit diagram of an identification detection circuit of the prior art. FIG. 3 is a diagram of another prior art detection circuit. Fig. 4 is a circuit diagram showing another type of identification and detection. Fig. 5 is a timing chart showing the operation of the identification and detection circuit of the inkjet print head shown in Fig. 4. FIG. 6 is a circuit diagram showing another type of identification detection. Fig. 7 is a circuit device diagram showing a unit cell identification detection circuit according to a first preferred embodiment of the present invention. FIG. 8A shows a circuit device diagram of a unit cell identification detection circuit according to a second preferred embodiment of the present invention. Fig. 8B shows the connection method when the circuit shown in Fig. 8A is connected to the identification detection circuit shown in Fig. 4. Description of graphical symbols: 1 1 0: printer circuit 1 1 3: controller 1 1 6: drive circuit 1 2 0 · print head circuit 1 2 3: print head array 1 2 6: identification detection circuit 1 2 9: Temperature sensing circuit 1 3 3: Signal line 1 3 6: Temperature sensing output line

1 1749twf. Pt.d Page 24 580432 Simple explanation of the drawing 2 0 0: Identification detection circuit 3 0 0: Identification detection circuit 320a, 320b, 320c, 320d: Unit cell shift register 3 0 5, 3 1 0, 3 1 5 ·· Signal line 3 3 0: Output line 4 0 1, 4 0 2, 4 0 3, 4 0 5 ·· Signal line 4 1 0: Counter 4 2 0: Programming unit 4 3 0 OR logic unit 6 0 1 · 1st programming terminal 6 0 3 · 2nd programming terminal 6 0 5: status output terminal 6 0 5 >: logic gate input terminal 6 0 7: third programming Terminal 6 1 0: first programmable switch 6 1 5 ·· second programmable switch 6 2 0: switching circuit 6 2 3 · · first transistor 6 2 6 · · second transistor 6 3 0: State input circuit 6 3 3: third transistor 6 3 6: fourth transistor 7 0 0: identification circuit 701 ′ 7 0 2 > 7 0 3, 7 0 5: signal line

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Claims (1)

580432 VI. The scope of the application for patents is as follows. The state of installation is as follows: the electric state includes the detection package detection, the identification of the head on the electricity detection, the printing of the printing, the identification of the printing, the identification of the ink, and the printing of the ink. ;, The spray terminal sets a certain number to enter a complex state. 1. There is a 1 state in the state of use. This can be compared with the open-ended process. The output state should be the same as qfclN —9 m annihilation process, which can be used by the first and the first by the »» · *. The connection is connected to the thermal coupling of the two sexes. Its QrKIKJ σβ. The position of the two-way electric power and the state of the two ends of the first and the first state of the state of Haihai 'Dingzhong decided to print the inkjet decision based on the identification of the head 1 tongue 4 P Bao Diweiwei' Fan Zhizhuang Special application status like road • electricity 2 electricity test. Mouth aw humiliation tht xi 01 ^ One general formula guide, can make the second control of the line and the number of the relevant information St. The formula is based on the process-Road first, the close of the open type one way with source ° The headline of the inkjet decisive decision includes the road circuit gfcl4, the road, the ΓχΙ, the first perimeter, and the fan Zhili's request for the application, such as the road • the electric 3 test and detection line signal-page-of- Line tgu! # May be based on the body and the crystal, one pass, the first pass, the negative, and the additional pass the #pass, when the pass is on, the passivation is the passivation of the body, the potential is the first line of the line according to the number. News, the second body of the second body of the first crystal, the second line of the first line, some of the first line and the aklJ < β π openness of the enclosing range of Fan Cheng Li Kezhuan 1 please first apply to the 4th source power gfcl- ^ 38- The open-type Cheng Kexianshi-p head prints the inkjet printing method as described in the above paragraphs, which can be installed in the second line and the first line. Line status No. State information Road No. 1 test and detection 11749twf.ptd Page 27 580432 6. Scope of patent application 5. The device for determining the status of the inkjet print head identification and detection circuit as described in item 1 of the scope of patent application, wherein the first and second programmable switches include fuse. 6. The device for determining the status of the inkjet print head identification and detection circuit as described in item 1 of the scope of the patent application, further comprising: a status input circuit having a third programming end, the status input circuit and the signal line couples Then, according to the control of the signal lines, the external power is turned on to the third programming terminal of the status input circuit. 7. The device for determining the status of the inkjet print head identification and detection circuit as described in item 6 of the scope of patent application, wherein the status entry circuit further includes: a third transistor, according to one of the signal lines. The three signal lines determine whether to conduct; and a fourth transistor, based on the potential of the fourth signal line among the signal lines transmitted when the first transistor is turned on, determines whether to connect the external power supply to the state input circuit. Third programming end. 8. The device for determining the status of a debt measurement circuit of an inkjet print head as described in item 7 of the scope of the patent application, wherein the third signal line and the fourth signal line may be the same signal line. 9. The device for determining the status of an inkjet print head recognition and detection circuit as described in item 3 of the scope of the patent application, further comprising: a status input circuit having a third programming end, the status input circuit and the signal line couples Then, according to the control of the signal lines, the external power is turned on to the third programming terminal of the state input circuit. 1 0. Determine the inkjet print head identification as described in item 9 of the scope of patent application 11749t.wf. Pt.d Page 28 580432 6. The device for detecting the status of the patent application range, wherein the status input circuit further includes: a third transistor, which is determined according to one of the signal lines of the third signal line Whether or not to conduct; and a fourth transistor, to determine whether to conduct the third programming of the external power supply to the state input circuit based on the potential of one of the signal lines transmitted when the first transistor is conducting end. 1 1. The device for determining the status of an inkjet print head recognition and detection circuit as described in item 10 of the scope of patent application, wherein the first signal line, the second signal line, the third signal line and the fourth signal line may be For the same signal line. 1 2. The device for determining the status of the inkjet print head identification and detection circuit as described in item 1 of the scope of the patent application, wherein the inkjet print head identification and identification detection circuit is composed of a shift register. 1 3. The device for determining the status of the inkjet print head identification detection circuit as described in item 1 of the scope of the patent application, wherein the inkjet print head identification detection circuit is composed of a counter. 14. The device for determining the status of the inkjet print head identification detection circuit as described in item 13 of the scope of the patent application, wherein the inkjet print head identification detection circuit further includes a logic gate. 1 5 · A method for determining the status of an inkjet printhead identification detection circuit, which is applied to an inkjet printhead with a plurality of signal lines, including: enabling both of the signal lines at the same time to turn on a An external power supply; and using the external power supply to programmatically couple to a first programmable switch and a second programmable switch of different potentials to thereby block the first programmable switch 11749twf.ptd Page 29 580432 6. One of the scope of patent application and the second programmable switch; Among them, these signal lines will not be enabled at the same time when the inkjet print head is operating normally. 16 · The method for determining the state of an inkjet print head identification and detection circuit as described in item 15 of the scope of the patent application, wherein the first programmable power electrically coupled to a different potential is programmed using the external power supply The step of switching the switch and the second programmable switch to block one of the first and second programmable switches includes: floating one end of one of the first and second programmable switches. The other end receives the external power supply; and one end of the other of the first and second programmable switches is grounded, and the other end receives the external power supply; wherein the first and second programmable switches are connected The _ grounded person will be blocked because of the voltage difference between the two ends. 1 7. The method for determining the status of the inkjet print head recognition detection circuit as described in item 15 of the scope of patent application, wherein two of the signal lines may be the same signal line. 18. The device for determining the status of an inkjet print head identification and detection circuit as described in item 1 of the scope of the patent application, wherein the first programmed switch and the second programmed switch include low-power resistors. 19. The device for determining the status of the inkjet print head identification and detection circuit as described in item 1 of the scope of the patent application, wherein one of the first programmed switch and the second programmed switch is a low-power resistor. 11749twf.ptd Page 30