Substrate and electronic device including substrate

Abstract

To provide a substrate capable of controlling different types of motors with one motor driver control circuit.SOLUTION: A substrate 13A includes a motor driver IC 132 with a first H bridge and a second H bridge, a first connector 136 to which an output of the first H bridge and an output of the second H bridge are input, first wiring P21 and second wiring P22 that input the output of the first H bridge to the first connector, third wiring P23 and fourth wiring P24 that input the output of the second H bridge to the first connector, fifth wiring P25 that is connected to the first wiring P21 and outputs the output of the first H bridge to the other connector 139, and sixth wiring P26 that is connected to the second wiring P22 and outputs the output of the first bridge to the other connector 139.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a substrate including a motor driver control circuit that controls the operation of a motor, and to an electronic device including the substrate. [Background technology]

[0002] In electronic devices such as printers, the driver board that controls the load is standardized, but some of the loads in the device may be removed or changed and sold as a different model.

[0003] For example, the motor (e.g., a stepping motor) controlled by a driver board in a color printer may be different from the motor (e.g., a DC motor) controlled by a driver board in a monochrome printer. Since creating different motor driver boards for a color printer and a monochrome printer would increase costs, there is a demand for a common board to control the motors in a color printer and a monochrome printer. Patent Document 1 proposes an engine board with a devised number of ports and wiring structure so that it can be connected to both a main board for a color printer and a main board for a monochrome printer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-176785 A Summary of the Invention [Problem to be solved by the invention]

[0005] The engine board 16 in Patent Document 1 is provided with a port P23 for connecting to a main board 15 of device A equipped with a color scanner 11, and wiring connecting the second communication unit 61c and the port P23. The engine board 16 can also be connected to a main board 25 of device B equipped with a monochrome scanner 21, but the above-mentioned port P23 and wiring are not used when connected to the main board 25. In Patent Document 1, the port 23 and wiring are provided so that the engine board 16 can be connected to both device A and device B, but it is not configured so that one motor driver control circuit can drive different types of motors.

[0006] Therefore, an object of the present invention is to provide a board capable of controlling different types of motors with one motor driver control circuit. [Means for solving the problem]

[0007] The control board of the printer device of the present invention comprises: a motor control circuit having a first H-bridge and a second H-bridge; a first connector to which an output of the first H-bridge and an output of the second H-bridge are input; a first wiring and a second wiring for inputting an output of the first H-bridge to the first connector; a third wiring and a fourth wiring for inputting an output of the second H-bridge to the first connector; a fifth wiring connected to the first wiring and for outputting an output of the first H-bridge to another connector, and a sixth wiring connected to the second wiring and for outputting an output of the first H-bridge to the other connector; A CPU that outputs a control signal to the motor control circuit, The CPU is characterized in that it sets the control signal to a control signal for controlling a stepping motor corresponding to a color printer, or sets the control signal to a control signal for controlling a DC motor corresponding to a monochrome printer, based on predetermined conditions. Effect of the Invention

[0008] According to the present invention, in the control board of the printer device, the CPU outputs a control signal for driving the motor according to a predetermined condition to the color printer. , for controlling stepping motors Set it to the control signal, or set it to monochrome printer compatible , for controlling DC motors It can be set to a control signal. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of a color printer 100A. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic configuration of a monochrome printer 100B. [Diagram 3] FIG. 2 is a block diagram showing a controller. [Figure 4] FIG. 2 is a diagram showing details of a printer control board of a color printer. [Diagram 5] FIG. 2 is a diagram showing details of a printer control board of a monochrome printer. [Figure 6] FIG. 2 is a diagram showing details of a motor driver IC. [Figure 7] (a) The drive waveform of a stepping motor output from a motor driver IC. (b) The drive waveform of a DC motor output from a motor driver IC. [Figure 8] FIG. 13 is a diagram showing a configuration for identifying whether the printer is a monochrome printer or a color printer. [Figure 9] FIG. 11 is a diagram showing details of a printer control board of a color printer according to a second embodiment. [Figure 10] FIG. 11 is a diagram showing details of a printer control board of a monochrome printer according to a second embodiment. [Figure 11] 13 is a diagram showing details of a printer control board of a modified monochrome printer. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings, in which: FIG.

[0011] First Embodiment FIG. 1 is a cross-sectional view showing a schematic configuration of a color printer 100A.

[0012] In Fig. 1, recording paper P stored in a cassette is fed by a paper feed roller 120 connected to a paper feed motor (not shown). The fed recording paper P passes through a single-sided transport path (dashed line in Fig. 1), passes through registration rollers 121 that perform skew correction, and is transported to a transfer position between intermediate transfer belt 116 and secondary transfer outer roller 119. After passing the transfer position, recording paper P passes through a fixing device 140 that fixes the image on recording paper P, and is then discharged outside color printer 100 by paper discharge rollers 122.

[0013] Reference numerals 111a, 111b, 111c, and 111d denote process units corresponding to four colors, yellow, magenta, cyan, and black, and each process unit includes a photosensitive drum and a developing machine.

[0014] FIG. 2 is a cross-sectional view showing a schematic configuration of the monochrome printer 100B.

[0015] The monochrome printer 100B of this embodiment is a model that does not include components that are unnecessary in a monochrome printer, such as the process units corresponding to yellow, magenta, and cyan from the color printer A described above. The monochrome printer 100B of this embodiment has a faster printing speed than the color printer 100A, and the temperature rise of the motor and the fixing device 140 is greater than that of the color model. For this reason, the monochrome printer 100B is equipped with fan units 150 and 160. The image quality and durability of the above-mentioned process units 111a, 111b, 111c, and 111d and the fixing device 140 are affected by the ambient temperature. Therefore, in the monochrome printer, the ambient temperature of the process unit 111d and the fixing device 140 is controlled by using the fan units 150 and 160.

[0016] 3 is a block diagram showing a controller that controls the printer. The details of the controller 11 that controls the printer will be described with reference to FIG.

[0017] 3, the controller 11 is connected to the printer control board 13 and the operation unit 12. The controller 11 includes a CPU 1101, a RAM 1102, a ROM 1103, an operation unit I / F 1105, a LAN controller 1106, and a power supply control unit 1114. The CPU 1101, the RAM 1102, the ROM 1103, the operation unit I / F 1105, the LAN controller 1106, and the power supply control unit 1114 are connected to a system bus 1107. The controller 11 also includes a HDD 1104, an image processing unit 1109, and a printer I / F 1113. The HDD 1104, the image processing unit 1109, and the printer I / F 1113 are connected to an image bus 1108.

[0018] The CPU 1101 performs overall control of access to various connected devices based on a control program stored in a ROM 1103 , and also performs overall control of various processes executed by the controller 11 .

[0019] The RAM 1102 is a system work memory for the operation of the CPU 1101. The RAM 1102 is also a memory for temporarily storing image data. The RAM 1102 has an SRAM that can retain stored contents even when the power is off, and a DRAM from which stored contents are erased when the power is off. The ROM 1103 stores the boot program of the device, etc. The HDD 1104 is a hard disk drive that stores the programs that control the printer and image data.

[0020] The operation unit I / F 1105 is an interface unit for connecting the system bus 1107 and the operation unit 12. This operation unit I / F 1105 receives image data to be displayed on the operation unit 12 from the system bus 1107 and outputs it to the operation unit 12, and also outputs information input from the operation unit 12 to the system bus 1107.

[0021] The LAN controller 1106 controls the input and output of information between the printer and the external device 50 connected to the network 60 .

[0022] A power supply control unit 1114 controls the power supply to each unit of the printer.

[0023] An image bus 1108 is a transmission path for exchanging image data, and is composed of a PCI bus, IEEE1394 or other bus.

[0024] An image processing unit 1109 is for performing image processing, reading out image data stored in the RAM 1102, and performing image processing such as enlargement or reduction of JPEG, JBIG, etc., and color adjustment.

[0025] The printer control board 13 controls the process unit, the fixing device, various rollers, various motors, and the like.

[0026] FIG. 4 is a diagram showing details of the printer control board of the color printer.

[0027] Next, the printer control board mounted on color printer 100A will be described in detail with reference to FIG.

[0028] The printer control board 13A of the color printer 100A has a CPU (processor) 130 and multiple motor driver ICs (motor driver control circuits) 131, 132, 133, and 134. The printer control board 13A has motor driver ICs 131, 132, 133, and 134 that control stepping motors STM-1, STM-2, STM-3, and STM-4 of developing machines corresponding to the four colors of yellow, magenta, cyan, and black. The motor driver ICs will be described in detail later.

[0029] The printer control board 13A has a connector 135 to which outputs a, b, c, and d from the motor driver IC 131 are input. The printer control board 13A also has a connector 136 to which outputs a, b, c, and d from the motor driver IC 132 are input. The printer control board 13A also has a connector 137 to which outputs a, b, c, and d from the motor driver IC 133 are input. The printer control board 13A also has a connector 138 to which outputs a, b, d, and d from the motor driver IC 134 are input. The connectors 135, 137, and 138 are connectors to which four signals can be input.

[0030] Furthermore, in this embodiment, the printer control board 13A has a connector 139 to which the outputs a, b, c, and d from the motor driver IC 132 are input.

[0031] The printer control board 13A is formed with a wiring P21 that connects the output a of the motor driver IC 132 to pin 1 of the connector 136, and a wiring P22 that connects the output b of the motor driver IC 132 to pin 2 of the connector 136. The printer control board 13A is formed with a wiring P23 that connects the output c of the motor driver IC 132 to pin 3 of the connector 136, and a wiring P24 that connects the output d of the motor driver IC 132 to pin 4 of the connector 136.

[0032] Printer control board 13A is formed with a wire P25 connected to wire P21, a wire P26 connected to wire P22, a wire P27 connected to wire P23, and a wire P28 connected to wire P24. However, no load is connected to connector 139 to which wires P25 to P28 are connected.

[0033] By forming the wirings P21 to P28 on the printer control board 13A as described above, the outputs a, b, c, and d from the motor driver IC 132 are input to both the connectors 136 and 139.

[0034] Furthermore, on printer control board 13A of this embodiment, a wiring P39A that connects pin 3 of connector 139 to CPU 130, and a wiring P39B that connects pin 6 of connector 139 to CPU 130 are formed.

[0035] Incidentally, the printer control board 13A is formed with wirings P11, P12, P13, and P14 that connect the motor driver IC 131 and the connector 135. The printer control board 13A is formed with wirings P31, P32, P33, and P34 that connect the motor driver IC 133 and the connector 137. The printer control board 13A is formed with wirings P41, P42, P43, and P44 that connect the motor driver IC 134 and the connector 138.

[0036] FIG. 5 is a diagram showing details of the printer control board of the monochrome printer.

[0037] Next, the printer control board mounted on the monochrome printer 100B will be described in detail with reference to Fig. 5. The printer control board 13A mounted on the monochrome printer 100B and the printer control board 13B mounted on the color printer 100A are common to each other except for the mounted parts. In other words, the motor driver ICs 133 and 134 and the connectors 137 and 138 mounted on the printer control board 12A of the color printer 100A are not mounted on the printer control board 13B mounted on the monochrome printer 100B. The printer control board 13B is provided with an unmounted area where a motor driver IC can be mounted, wirings P21-24, wirings P31-P34, and wirings P41-P44.

[0038] The printer control board 13B of the monochrome printer 100B has a CPU 130 and a plurality of motor driver ICs 131 and 132. The printer control board 13B has a motor driver IC 131 that controls a stepping motor STM-1 of a developing unit corresponding to black. The printer control board 13B also has a motor driver IC 132 that controls two DC motors BM-1 and BM-2. The DC motors BM-1 and BM-2 are motors that drive fans and are included in the fan units 150 and 160, respectively. The DC motors BM-1 and BM-2 each have a three-pin connector. Pin 1 of the connector of the DC motor BM-1 and pin 1 of the connector of the DC motor BM-2 are each pins for outputting a lock signal. Pin 3 of the connector 140A of the DC motor BM-1 is connected to pin 1 of the connector 139, and pin 2 of the connector 140A of the DC motor BM-1 is connected to pin 2 of the connector 139. Furthermore, pin 3 of connector 140B of DC motor BM-2 is connected to pin 4 of connector 139, and pin 2 of connector 140B of DC motor BM-2 is connected to pin 5 of connector 139. Connector 140A of DC motor BM-1 and connector 139 are connected by three wires. Connector 140B of DC motor BM-2 and connector 139 are connected by three wires.

[0039] Pin 3 of connector 139 is connected to CPU 130 via wiring P39A, and pin 6 of connector 139 is connected to CPU 130 via wiring P39B. CPU 130 detects that DC motor BM-1 is locked according to a signal input via wiring P39A. CPU 130 also detects that DC motor BM-2 is locked according to a signal input via wiring P39B. When DC motor BM-1 is locked, a lock signal is sent to CPU 130 via pin 1 of connector 140A, pin 3 of connector 139, and wiring P39A. When DC motor BM-2 is locked, a lock signal is sent to CPU 130 via pin 1 of connector 140B, pin 3 of connector 139, and wiring P39B.

[0040] Printer control board 13B has connector 135 to which outputs a, b, c, and d from motor driver IC 131 are input, similar to printer control board 13A. Printer control board 13B has connector 136 to which outputs a, b, c, and d from motor driver IC 132 are input, similar to printer control board 13A. However, no load is connected to connector 136. Printer control board 13B does not have connectors 137 and 138 mounted on printer control board 13A. Printer control board 13B does not have motor driver IC 133 and motor driver IC 134 mounted. Wiring (P31 to P34, P41 to P44) used when motor driver IC 133 and motor driver IC 134 are mounted is formed on printer control board 13B.

[0041] Fig. 6 is a diagram showing the details of the motor driver IC. The details of the motor driver IC will be described with reference to Fig. 6.

[0042] Motor driver IC 132 drives stepping motor STM-2 in color printer 100A. Motor driver ICs 131, 133, and 134 have the same functions as motor driver IC 131, and therefore their description will be omitted. Motor driver IC 132 of this embodiment drives both DC motors BM-1 and BM-2 in monochrome printer 100B.

[0043] The motor driver IC 132 has a control circuit 200 and two H-bridge circuits 201 and 202. The H-bridge circuit 201 has four switches (e.g., field effect transistors) SW1, SW2, SW3, and SW4. The control circuit 200 outputs a control signal to each of the four switches SW1, SW2, SW3, and SW4. The switches SW1, SW2, SW3, and SW4 are turned on or off according to the control signal. The H-bridge circuit 201 has two power supply terminals A and B. a is output from the power supply terminal A, and b is output from the power supply terminal B.

[0044] When driving the DC motor BM-1, the outputs a to d from the power terminals A to D have waveforms as shown in FIG. 7(a). A voltage is applied to two power terminals A and B. The control circuit 200 turns on the switches SW1 and SW4 and turns off the switches SW2 and SW3 in order to connect the (+) of the DC power supply to one power terminal A and the (-) of the other power terminal B. This causes the DC motor BM-1 to rotate in the forward direction. The control circuit 200 also turns on the switches SW2 and SW3 and turns off the switches SW1 and SW4 in order to connect the (-) of the DC power supply to one power terminal A and the (+) of the other power terminal B. This causes the DC motor BM-1 to rotate in the reverse direction. Also, when SW1 and SW3 are turned off and SW2 and SW4 are turned on, the motor stops. Note that the DC motors BM-1 and BM-2 of this embodiment only rotate in the forward direction and do not rotate in the reverse direction.

[0045] When driving the DC motor BM-2, a voltage is applied to two power supply terminals C and D of the H-bridge circuit 202. c is output from the power supply terminal C, and d is output from the power supply terminal D. The H-bridge circuit 202 has the same configuration as the H-bridge circuit 201, and therefore a description thereof will be omitted.

[0046] When driving the stepping motor STM-2, two H-bridge circuits 201 and 202 are used. Generally, a two-phase stepping motor has four systems of coils A, B, A*, and B*. Power supply terminals A and B of the H-bridge circuit 201 correspond to the coils A and A*, respectively, and power supply terminals C and D of the H-bridge circuit 202 correspond to the coils B and B*, respectively. The stepping motor STM-2 is driven by changing the direction of the current flowing through the coils in steps.

[0047] When driving the stepping motor STM-2, the outputs a to d from the power supply terminals A to D have waveforms as shown in FIG. 7(b).

[0048] Fig. 8 shows a configuration for identifying whether the printer is a monochrome printer or a color printer. The general-purpose IO port P01 of the CPU 130 is a port assigned to identify the printer model. As shown in Fig. 8(a), if the general-purpose IO port P01 is at a low level, the CPU 130 recognizes the printer as a color printer. Also, if the general-purpose IO port P01 is at a high level, the CPU 130 recognizes the printer as a monochrome printer.

[0049] A circuit in which resistor 311 is not mounted and resistor 312 is mounted is connected to CPU 130 of color printer control board 13A. Also, a circuit in which resistor 311 is mounted and resistor 312 is not mounted is connected to CPU 130 of monochrome printer control board 13B.

[0050] <Second embodiment> In the first embodiment, the wiring is formed by branching the outputs a to d of the motor driver 132 to two connectors. In the second embodiment, the outputs a and b of the motor driver 132 are not branched.

[0051] 9 is a diagram showing details of the printer control board of the color printer of the second embodiment. The printer control board 113A is formed with a wiring P21 that connects the output a of the motor driver IC 132 to the pin 1 of the connector 136, and a wiring P22 that connects the output b of the motor driver IC 132 to the pin 2 of the connector 136. The printer control board 13A is formed with a wiring P23 that connects the output c of the motor driver IC 132 to the pin 3 of the connector 136, and a wiring P24 that connects the output d of the motor driver IC 132 to the pin 4 of the connector 136. The printer control board 113A is also formed with a wiring P25 that connects to the wiring P23, and a wiring P29 that connects to the CPU 130. Note that the printer control board 113A is not yet equipped with a connection circuit 170 that connects the wiring P25 and the wiring P29.

[0052] 10 is a diagram showing details of the printer control board of the monochrome printer of the second embodiment. The printer control board 113B of the monochrome printer is provided with a connection circuit 170 that connects the wires P25 and P29. The connector 136 may be a three-pin connector.

[0053] <Modification> In the above embodiment, a printer has been described as an example, but the substrate of the present invention may also be applied to electronic devices such as personal computers and servers.

[0054] Furthermore, in the above embodiment, the stepping motor that drives the developing unit has been described, but the stepping motor may also drive other actuators such as a photoconductor.

[0055] In the above embodiment, a board capable of controlling a stepping motor has been described, but two DC motors may be controlled instead of the stepping motor STM-2 as shown in Fig. 9. In other words, the printer control board is a board capable of controlling both two DC motors and two DC motors having a LOCK pin.

[0056] Furthermore, although both the wirings P39A and P39B are formed on the printer control boards 13A and 13B, only one of them may be formed.

[0057] 8, a circuit for identifying the printer model is connected to port P01 of CPU 130, but CPU 130 may receive printer model information from controller 11. CPU 130 may have a memory that stores printer model information, or may be able to refer to a memory that stores printer model information.

[0058] Moreover, an example in which the motor driver IC 132 drives two DC motors has been described, but as shown in FIG. 11, in a monochrome printer 100B, the motor driver IC 132 may drive one DC motor.

[0059] Furthermore, in the monochrome printer 100B, the connector 136 may be omitted. [Explanation of symbols]

[0060] 100A Color Printer 100B monochrome printer 132 Motor driver IC STM-2 stepping motor BM-1 DC motor BM-2 DC motor 136 Connector 139 Connector 201 H-bridge circuit 202 H-bridge circuit

Claims

1. a motor control circuit having a first H-bridge and a second H-bridge; a first connector to which an output of the first H-bridge and an output of the second H-bridge are input; a first wiring and a second wiring for inputting an output of the first H-bridge to the first connector; a third wiring and a fourth wiring for inputting an output of the second H-bridge to the first connector; a fifth wiring connected to the first wiring and for outputting an output of the first H-bridge to another connector, and a sixth wiring connected to the second wiring and for outputting an output of the first H-bridge to the other connector; a CPU that outputs a control signal to the motor control circuit; The CPU sets the control signal to a control signal for controlling a stepping motor corresponding to a color printer, or sets the control signal to a control signal for controlling a DC motor corresponding to a monochrome printer, based on a predetermined condition.

23. A control board for a printer device comprising:

2. The stepping motor is a motor for driving a developing unit of the printer device, or a motor for driving a photoconductor of the printer device.

2. The control board according to claim 1 .

3. The DC motor is a motor for driving a fan of the printer device.

2. The control board according to claim 1 .

4. The predetermined condition is a condition based on a signal input by the CPU.

2. The control board according to claim 1 .

5. The signals input to the CPU are determined by the components mounted on the control board. The control board according to claim 4 .

6. when the control signal is a signal for controlling the stepping motor, two outputs of one H-bridge circuit of the first H-bridge and the second H-bridge are mutually inverted outputs, and two outputs of the other H-bridge circuit are mutually inverted outputs; When the control signal is a signal for controlling the DC motor, one of the two outputs of at least one of the H-bridge circuits is a fixed output.

2. The control board according to claim 1 .

7. a motor control circuit having a first H-bridge and a second H-bridge; a first connector to which an output of the first H-bridge and an output of the second H-bridge are input; a first wiring and a second wiring for inputting an output of the first H-bridge to the first connector; a third wiring and a fourth wiring for inputting an output of the second H-bridge to the first connector; a fifth wiring connected to the first wiring and for outputting an output of the first H-bridge to another connector, and a sixth wiring connected to the second wiring and for outputting an output of the first H-bridge to the other connector; A control board including a CPU that outputs a control signal to the motor control circuit, The CPU sets the control signal to a control signal for controlling a stepping motor corresponding to a color printer, or sets the control signal to a control signal for controlling a DC motor corresponding to a monochrome printer, based on a predetermined condition. A printer apparatus comprising:

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