CN103085490A - Printing device and circuit substrate for the same - Google Patents

Abstract

The present invention provides a printing device and a circuit substrate for the same. The printing device comprises the following components: first to nth (n is an integer which is larger than 2) printing material accommodating members (100-1 to 100-n)which are respectively provided with a memory device (203) for storing printing material information and a plurality of memory device terminals, and a control part (300) which is connected with the plurality of memory device terminals of the first to nth printing material accommodating members for performing data reading-out or writing-in control. A plurality of memory device terminals of each of ith(i is an integer satisfying 1<i<n-1)-jth(j is an integer satisfying i<j<n) in the first to nth printing material accommodating members are commonly connected with the control part (300) through a bus MBS. The plurality of memory device terminals of the first printing material accommodating member (100-1) is connected with the control part (300) separately from the bus MBS. The plurality of memory device terminals of the nth printing material accommodating member (100-n) is connected with the control part (300) separately from the bus MBS.

Description

Printing equipment and printing equipment circuit substrate

Technical field

The present invention relates to printing equipment and printing equipment with circuit substrate etc.

Background technology

For example put down in writing following technology in patent documentation 1: in having the printing equipment of testing circuit, prevent or suppress printing material housing that other short circuit of storage device that the high voltage circuit that is used to detect and printing material housing have or printing equipment causes and the unfavorable condition of printing equipment, described testing circuit detects the level of the amount of the printing material that holds in the kind, printing material housing of printing material housing (print cartridge etc.).

The prior art document

Patent documentation

Patent documentation 1: patent documentation JP 2007-196664 communique.

Summary of the invention

According to several modes of the present invention, can provide the printing equipment of the installation and measuring that can carry out efficiently reliable and secure printing material housing and printing equipment with circuit substrate etc.

an embodiment of the invention relate to a kind of printing equipment, and described printing equipment comprises: the first printing material housing～n printing material housing has respectively storage device and a plurality of storage device terminal of memory print material information, and control part, be connected with terminal with described a plurality of storage devices of described the first printing material housing～described n printing material housing, and described storage device is carried out the control of reading or writing of data, described a plurality of storage devices of each of the i printing material housing in described the first printing material housing～described n printing material housing～j printing material housing jointly are connected with described control part by bus with terminal, described a plurality of storage devices of described the first printing material housing are connected with described control part with described bus discretely with terminal, described a plurality of storage devices of described n printing material housing are connected with described control part with described bus discretely with terminal, wherein, n is the integer more than 2, i is the integer of 1＜i＜n-1, j is the integer of i＜j＜n.

According to an embodiment of the invention, the first, the storage device of n printing material housing is connected with control part with other printing material housing discretely with terminal, therefore in the situation that first, the unfavorable conditions such as short circuit have occured in the storage device of n printing material housing with terminal, can prevent from affecting the storage device of other printing material housing.In addition, the storage device of i～j printing material housing jointly is connected with control part by bus with terminal, therefore can simplify the circuit formation of control part etc.Consequently, can be reliably, safety and carry out efficiently the installation and measuring of printing material housing, and protect reliably storage device etc. when short circuit occurs.

In addition in an embodiment of the invention, printing equipment can be: comprise circuit substrate, described control part is installed on described circuit substrate, described circuit substrate has the bus terminals of the first end subgroup that is connected with terminal with described a plurality of storage devices of described the first printing material housing～described n printing material housing～n terminal group and described bus, described first end subgroup is configured in the first end avris of described circuit substrate, the second end avris relative with described first end limit that described n terminal group is configured in described circuit substrate.

Like this, the first, n printing material housing is connected with the terminal group of first, second end avris that is configured in circuit substrate, therefore in the situation that be arranged on the storage device of printing material housing of the end avris of circuit substrate, the unfavorable conditions such as short circuit having occured with terminal, can prevent from affecting the storage device of other printing material housing.

In addition in an embodiment of the invention, printing equipment can be: described i printing material housing is the second printing material housing in described the first printing material housing～described n printing material housing, and described j printing material housing is the n-1 printing material housing in described the first printing material housing～described n printing material housing.

Like this, among n printing material housing, n-2 printing material housing except two printing material housings of the end avris that is arranged on circuit substrate, can each storage device jointly be connected with control part with terminal by bus, therefore can simplify the circuit formation of control part etc.

In addition in an embodiment of the invention, printing equipment can be: described a plurality of storage devices of described i printing material housing～described j printing material housing comprise respectively clock terminal, data terminal, the first power supply terminal and second source terminal with terminal, and described clock terminal, described data terminal, described the first power supply terminal and described second source terminal jointly are connected with described control part by described bus respectively.

Like this, clock terminal, data terminal, the first power supply terminal and the second source terminal of i～j printing material housing jointly can be connected with control part by bus.

In addition in an embodiment of the invention, printing equipment can be: described a plurality of storage devices of described i printing material housing～described j printing material housing also comprise respectively reseting terminal with terminal.

Like this, reseting terminal, clock terminal, data terminal, the first power supply terminal and the second source terminal of i～j printing material housing jointly can be connected with control part by bus.

In addition in an embodiment of the invention, printing equipment can be: described control part comprises the installation and measuring section of the installation that detects described the first printing material housing～described n printing material housing, described i printing material housing～described j printing material housing comprises respectively the installation and measuring terminal, and described installation and measuring terminal jointly is connected with described control part.

Like this, control part can detect the installation of the first～the n printing material housing.In addition, the installation and measuring terminal of i～j printing material housing jointly can be connected to control part, therefore can simplify the circuit formation of installation and measuring section.

In addition in an embodiment of the invention, printing equipment can be: the described installation and measuring terminal of the k printing material housing in described i printing material housing～described j printing material housing and the described installation and measuring terminal of k+2 printing material housing jointly are connected with described control part, wherein, k is the integer of i≤k≤j-2.

Like this, for two printing material housings of the configuration in interval from i～j printing material housing, installation and measuring terminal separately jointly can be connected to control part.

In addition in an embodiment of the invention, printing equipment can be: when the installation of described the first printing material housing～described n printing material housing detected in described installation and measuring section, described control part was set as high impedance status with described a plurality of storage devices with terminal.

Like this, when detecting the installation of printing material housing, even in the situation that applied the installation and measuring terminal and the storage device use short-circuit of terminals of installation and measuring with voltage, can prevent that also installation and measuring is applied to storage device with voltage.

Other embodiment of the present invention relates to the printing equipment circuit substrate, and described printing equipment comprises with circuit substrate: first end subgroup～n terminal group is connected with the first printing material housing～n printing material housing; And bus terminals, i terminal group in described first end subgroup～described n terminal group～j terminal group jointly is connected with control part, described first end subgroup is connected with described control part discretely with described bus terminals, described n terminal group is connected with described control part discretely with described bus terminals, wherein, n is the integer more than 2, and i is the integer of 1＜i＜n-1, and j is the integer of i＜j＜n.

According to other embodiment of the present invention, the first, the n terminal group is connected with control part discretely with bus terminals respectively, even therefore in the situation that first, the unfavorable conditions such as short circuit have occured in the terminal of n terminal group, also can prevent from affecting other terminal group.

In other embodiment of the present invention, printing equipment with circuit substrate can be: described first end subgroup～described n terminal group comprises respectively be used to a plurality of storage device terminals of accessing described the first printing material housing～storage device that described n printing material housing has in addition.

Like this, control part can be via the storage device of the first～the n terminal group access the first～the n printing material housing.

In other embodiment of the present invention, printing equipment with circuit substrate can be: described first end subgroup～described n terminal group has respectively the installation and measuring terminal for detection of the installation of described the first printing material housing～described n printing material housing in addition.

Like this, control part can detect via the first～the n terminal group the installation of the first～the n printing material housing.

Description of drawings

Fig. 1 is the stereogram that the configuration example of printing equipment is shown;

(A) of Fig. 2 and (B) of Fig. 2 are the stereograms that the outward appearance of printing material housing is shown;

(A) of Fig. 3 and (B) of Fig. 3 are the configuration examples of substrate;

Fig. 4 is the first configuration example of printing material housing and circuit substrate etc.;

Fig. 5 is the second configuration example of printing material housing and circuit substrate etc.;

Fig. 6 is the basic configuration example of the electric formation of printing equipment;

Fig. 7 is the configuration example of the circuit relevant to short-circuit detecting and installation and measuring;

Fig. 8 is the flow chart of installation and measuring and memory access;

(D) of (A)～Fig. 9 of Fig. 9 is the detailed configuration example of output circuit and imput output circuit;

Figure 10 is the detailed configuration example of short-circuit detecting section and voltage application portion;

(A) of Figure 11 and (B) of Figure 11 are the figure of the installation and measuring method of explanation printing material housing;

Figure 12 is the detailed configuration example of installation and measuring section.

The explanation of symbol

100 print cartridges (printing material housing)

200 substrates

201 cylinder grooves

202 cylindrical holes

203 storage devices

300 control parts

310 short-circuit detecting sections

320 voltage application portion

330 installation and measuring sections

The 340CO test section

350 communication process sections

360 high voltage control parts

400 master control part

410CPU

420 memories

430 display parts

441 LVPSs

442 high-voltage power supplies

450 circuit substrates

TG1～TG6 first～the 6th terminal group

The MBS bus

First, second short-circuit detecting terminal of CO1, CO2

First, second installation and measuring terminal of DT1, DT2

The RST reseting terminal

The SCK clock terminal

The SDA data terminal

The VDD power supply terminal

The VSS ground terminal

The ND detection node

The specific embodiment

Below, explain preferred embodiment of the present invention.In addition, below the present embodiment of explanation is not the embodiment that the content of the present invention of putting down in writing in claims is limited undeservedly, and the whole of the formation that illustrates in present embodiment may not be that solution of the present invention is necessary.

1. printing equipment

Fig. 1 is the stereogram that the configuration example of the printing equipment in present embodiment is shown.Printing equipment 1000 comprises the box installation portion 1100 that print cartridge (printing material housing) is installed, cover 1200 and operating portion 1300 free to rotate.Box installation portion 1100 is also referred to as " cartridge holder " or referred to as " retainer ".In example shown in Figure 1, box installation portion 1100 can be installed 4 print cartridges independently, and black, yellow, magenta, these 4 kinds of print cartridges (printing material housing) 100 of cyan for example can be installed.Cover 1200 can omit.Operating portion 1300 is input units that the user carries out various indications or setting, in addition, comprises the display part that carries out various notices to the user.

(A) of Fig. 2 and (B) of Fig. 2 are the stereograms that the outward appearance of print cartridge 100 is shown.XYZ axle in (A) of Fig. 2, (B) of Fig. 2 is corresponding with the XYZ axle of Fig. 1.In addition, print cartridge is also referred to as " box ".This box 100 has the face shaping of flat roughly cuboid, and among the size L1 of three directions, L2, L3, length L 1 (size of direction of insertion) maximum, width L2 minimum, height L3 are between length L 1 and width L2.

Box 100 comprises front end face (first surface) Sf, rear end face (the second face) Sr, end face (the 3rd face) St, bottom surface (fourth face) Sb and two sides (the 5th and the 6th face) Sc, Sd.Be provided with the ink accommodating chamber 120 (also referred to as " ink bag container ") that is formed by flexible material in the inside of box 100.Front end face Sf comprises two locating holes 131,132 and ink supply port 110.Be provided with substrate 200 on end face St.Be equipped with on substrate 200 for the non-volatile memory device of preserving the information relevant to ink.The first side Sc and the second side Sd toward each other, in addition, with front end face Sf, end face St, rear end face Sr and bottom surface Sb quadrature.Dispose concavo-convex fitting portion 134 on the position that the second side Sd and front end face Sf intersect.

(A) of Fig. 3 shows the formation of the substrate 200 in present embodiment.The surface of substrate 200 is faces that substrate 200 exposes when being installed to box 100 laterally.(B) of Fig. 3 shows the figure that sees when the side of substrate 200 is observed.Be formed with cylinder groove 201 in the upper end of substrate 200, be formed with cylindrical hole 202 in the bottom of substrate 200.

Arrow SD in Fig. 3 (A) shows to the installation direction of box installation portion 1100 mounting boxs 100.This installation direction SD is consistent with the installation direction (directions X) of box shown in Figure 2.Substrate 200 has storage device 203 overleaf, is provided with from the teeth outwards the terminal group that is comprised of 9 terminals.Although omitted diagram, disposed for wiring and other the wiring of splicing ear and storage device 203 at the surface of substrate 200 and the back side and be used for being electrically connected to the wiring of substrate surface and the through hole of the wiring of substrate back.Storage device 203 preserve the information relevant to box 100 and with box 100 in the ink that the holds information (for example quantity of ink information, ink surplus, exhausted amount of ink) of being correlated with.These terminals are formed the essentially rectangular shape, and are configured to form two row substantially vertical with installation direction SD.

Be provided with a plurality of storage devices terminal RST, SCK, SDA, VDD, VSS and the first installation and measuring terminal DT1, the second installation and measuring terminal DT2, the first short-circuit detecting terminal CO1 and the second short-circuit detecting terminal CO2 on substrate 200.

Among two row, the installation direction SD nearby row of side (row that are positioned at upside in Fig. 3 (A)) is called upside row A1 (first row), and the row in the distally of installation direction SD (row that are positioned at downside in Fig. 3 (A)) are called downside row A2 (secondary series).In addition, can think that also these row A1, A2 are the row that the contact site cp by a plurality of terminals forms.The contact site cp of a plurality of terminals is arranged on the connector of retainer inside and the part of a plurality of termination contact in order to connect printing equipment lateral circuit substrate and circuit substrate 200 when box is installed to printing equipment.

Terminal DT1, the VDD, VSS, SDA, the DT2 that form terminal CO1, RST, SCK, CO2 and the formation downside row A2 of upside row A1 have respectively following function (purposes).

＜upside row A1＞

(1) first short-circuit detecting terminal CO1

(2) reseting terminal RST

(3) clock terminal SCK

(4) second short-circuit detecting terminal CO2

＜downside row A2＞

(5) first installation and measuring terminal DT1

(6) first power supply terminal (power supply terminal) VDD

(7) second source terminal (ground terminal) VSS

(8) data terminal SDA

(9) second installation and measuring terminal DT2

First, second installation and measuring terminal DT1, DT2 use when whether detection box 100 correctly is arranged on box installation portion 1100 as described later.In addition, first, second short-circuit detecting terminal CO1, CO2 use during short circuit at first, second installation and measuring terminal of detection DT1, DT2.Other 5 terminals that terminal RST, SCK, VDD, VSS, SDA are storage device 203 use are also referred to as " memory terminal ".

Each terminal in the central section have with a plurality of device side terminals in the contact site cp of corresponding termination contact.Each contact site cp of the terminal of each contact site cp of the terminal of formation upside row A1 and formation downside row A2 has been consisted of so-called staggered configuration by interconnected.In addition, form the terminal of upside row A1 and form downside row A2 terminal also by interconnected, consisted of so-called staggered configuration and made terminal center each other not arrange on installation direction SD.

First, second short-circuit detecting terminal CO1 of upside row A1, each contact site of CO2 are configured in respectively the both ends of upside row A1, namely are configured in respectively the outermost of upside row A1.In addition, first, second installation and measuring terminal DT1 of downside row A2, each contact site of DT2 are configured in the both ends of downside row A2, namely are configured in respectively the outermost of downside row A2.The contact site of memory terminal RST, SCK, VDD, VSS, SDA is by the substantial middle of centralized configuration in the zone that disposes all 9 terminals.In addition, the contact site of first, second short-circuit detecting terminal CO1, CO2 and first, second installation and measuring terminal DT1, DT2 is configured in four angles of the set of memory terminal RST, SCK, VDD, VSS, SDA.

In as printing equipments such as ink-jet printers, the ink of electric conductivity etc. may be attached to the terminals side of substrate 200.As shown in Fig. 3 (A), the first short-circuit detecting terminal CO1 is adjacent with the first installation and measuring terminal DT1, and the second short-circuit detecting terminal CO2 is adjacent with the second installation and measuring terminal DT2.Therefore, such as be attached to the terminals side of substrate 200 due to ink of electric conductivity etc., may cause adjacent two terminal CO1 and DT1 or CO2 and DT2 due to be short-circuited (electric leakages) such as inks of electric conductivity.In addition, also possibility short circuit of the first installation and measuring terminal DT1 and power supply terminal VDD, perhaps the second installation and measuring terminal DT2 and data terminal SDA also may short circuits.

First, second installation and measuring terminal DT1, DT2 are the terminals for detection of the installation of printing material housing 100, apply high voltage (for example 42V) to DT1, DT2 when carrying out this installation and measuring.Therefore, in the situation that DT1 or DT2 and other terminal because ink of electric conductivity etc. is short-circuited, might apply high voltage such as the circuit to storage device 203 grades and circuit is destroyed.

As described below, printing equipment according to present embodiment, even in the situation that because ink of electric conductivity etc. causes being short-circuited between terminal, the high voltage that puts on installation and measuring terminal DT1, DT2 in the time of also preventing due to installation and measuring destroys the circuit of storage device 203 etc.

Fig. 4 illustrates first configuration example of printing material housing in the printing equipment of present embodiment and circuit substrate etc.The first configuration example comprises the first printing material housing 100-1～4 (being n (n is the integer more than 2) in a broad sense) printing material housing 100-4, control part 300 and circuit substrate 450.In addition, the printing equipment of present embodiment is not limited to the formation of Fig. 4, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.

Printing material housing 100-1～100-4 has respectively the storage device 203 of memory print material information, and (203-1～203-4), a plurality of storage device are with terminal RST, SCK, VDD, VSS, SDA, installation and measuring terminal DT1, DT2 and short-circuit detecting terminal CO1, CO2.Be provided with installation and measuring resistive element RD between DT1 and DT2.CO1, CO2 are electrically connected to by wiring in the inside of printing material housing 100.

A plurality of storage devices of control part 300 and first～the 4th printing material housing 100-1～100-4 are connected with terminal RST, SCK, VDD, VSS, SDA, storage device 203 are carried out the control of reading or writing of data.

A plurality of storage devices separately of in first～the 4th printing material housing 100-1～100-4 second (being i (i is the integer of 1＜i＜n-1) in a broad sense)～the 3rd (being j (j is the integer of i＜j＜n) in a broad sense) printing material housing 100-2,100-3 jointly are connected with control part 300 by bus MBS with terminal RST, SCK, VDD, VSS, SDA.A plurality of storage devices of the first printing material housing 100-1 are connected with control part 300 with bus MBS discretely with terminal RST, SCK, VDD, VSS, SDA.A plurality of storage devices of the 4th (being n in a broad sense) printing material housing 100-4 are connected with control part 300 with bus MBS discretely with terminal RST, SCK, VDD, VSS, SDA.

Circuit substrate 450 is printing equipment circuit substrates, and control part 300 is installed, and comprises the bus terminals of first～the 4th (being n in a broad sense) terminal group TG1～TG4 and bus MBS.First～the 4th terminal group TG1～TG4 is connected with first～the 4th printing material housing 100-1～100-4.First～the 4th terminal group TG1～TG4 has respectively a plurality of storage devices terminal CRST, CSCK, CVDD, CVSS, the CSDA of the storage device 203-1～203-4 that has for access first～the 4th printing material housing 100-1～100-4.In addition, first～the 4th terminal group TG1～TG4 has respectively installation and measuring terminal CDT1, the CDT2 for detection of the installation of first～the 4th printing material housing 100-1～100-4.

First end subgroup TG1 is configured in the first end avris of circuit substrate 450, the second end avris relative with the first end limit that the 4th (being n in a broad sense) terminal group TG4 is configured in circuit substrate 450.The second (being i (i is the integer of 1＜i＜n-1) in a broad sense)～3rd (being j (j is the integer of i＜j＜n) in a broad sense) terminal group TG2, TG3 in first～the 4th (being n in a broad sense) terminal group TG1～TG4 jointly is connected to control part 300 by the bus terminals of bus MBS.In addition, first end subgroup TG1 is connected with control part 300 discretely with the bus terminals of bus MBS.In addition, the 4th (being n in a broad sense) terminal group TG4 is connected with control part 300 discretely with the bus terminals of bus MBS.

As shown in Figure 4, in the printing equipment of the first configuration example, be configured in the first end subgroup TG1 of first end avris of circuit substrate 450 and the 4th terminal group TG4 that is configured in the second end avris relative with the first end limit and be connected with control part 300 discretely with bus MBS respectively.That is, the storage device of the first, the 4th printing material housing 100-1,100-4 is connected with control part 300 with terminal RST, SCK, VDD, VSS, SDA with the storage device of other printing material housing 100-2,100-3 discretely with terminal RST, SCK, VDD, VSS, SDA.

In the printing equipment such as ink-jetting style, when ink sprayed from print head, the part of ink became vaporific (smog) and is dispersed in air.Be centered around the end avris of circuit substrate 450 due to this ink mist, therefore with from printing material housing 100-2, the 100-3 that holds the limit to separate compare, the printing material housing 100-1, the 100-4 that are positioned at the end avris occur because the possibility of the short circuit between the terminal that causes adhering to of ink mist is larger.

In the printing equipment of the first configuration example, even be short-circuited in the situation that be positioned at printing material housing 100-1, the 100-4 of end avris, therefore because it separates with other printing material housing 100-2,100-3, also can prevent from communicating by letter between storage device 203-2, the 203-3 of control part 300 and other printing material housing exerted an influence.In addition, can prevent from applying high voltage etc. to storage device 203-2,203-3 when installation and measuring.Consequently, can be reliably and carry out safely installation and measuring of printing material housing 100-1～100-4 etc.

Second configuration example of printing material housing in the printing equipment of present embodiment and circuit substrate etc. has been shown in Fig. 5.The second configuration example comprises the first printing material housing 100-1～6 (being n (n is the integer more than 2) in a broad sense) printing material housing 100-6, control part 300 and circuit substrate 450.In addition, the printing equipment of present embodiment is not limited to the formation of Fig. 4, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.

Printing material housing 100-1～100-6 has respectively the storage device 203 of memory print material information, and (203-1～203-6), a plurality of storage device are with terminal RST, SCK, VDD, VSS, SDA, installation and measuring terminal DT1, DT2 and short-circuit detecting terminal CO1, CO2.Be provided with installation and measuring resistive element RD between DT1 and DT2.CO1, CO2 are electrically connected by wiring in the inside of printing material housing 100.

A plurality of storage devices of control part 300 and first～the 6th printing material housing 100-1～100-6 are connected with terminal RST, SCK, VDD, VSS, SDA, storage device 203 are carried out the control of reading or writing of data.

A plurality of storage devices separately of in first～the 6th printing material housing 100-1～100-6 second (being i (i is the integer of 1＜i＜n-1) in a broad sense)～the 5th (being j (j is the integer of i＜j＜n) in a broad sense) printing material housing 100-2～100-5 jointly are connected with control part 300 by bus MBS with terminal RST, SCK, VDD, VSS, SDA.A plurality of storage devices of the first printing material housing 100-1 are connected with control part 300 with bus MBS discretely with terminal RST, SCK, VDD, VSS, SDA.A plurality of storage devices of the 6th (being n in a broad sense) printing material housing 100-6 are connected with control part 300 with bus MBS discretely with terminal RST, SCK, VDD, VSS, SDA.

Installation and measuring terminal DT1, the DT2 of second (being i in a broad sense)～5th (being j in a broad sense) printing material housing 100-2～100-5 jointly are connected with control part 300.Specifically, installation and measuring terminal DT1, the DT2 of installation and measuring terminal DT1, DT2 and the 4th (being k+2 in a broad sense) the printing material housing 100-2 of second (being k (k is the integer of i≤k≤j-2) in a broad sense) printing material housing 100-2 jointly are connected with control part 300.In addition, installation and measuring terminal DT1, the DT2 of the 3rd printing material housing 100-3 jointly are connected with control part 300 with installation and measuring terminal DT1, the DT2 of the 5th printing material housing 100-5.

Circuit substrate 450 is printing equipment circuit substrates, and it is equipped with control part 300, and comprises the bus terminals of first～the 6th (being n in a broad sense) terminal group TG1～TG6 and bus MBS.First～the 6th terminal group TG1～TG6 is connected with first～the 6th printing material housing 100-1～100-6.First～the 6th terminal group TG1～TG6 has respectively a plurality of storage devices terminal CRST, CSCK, CVDD, CVSS, the CSDA of the storage device 203-1～203-6 that has for access first～the 6th printing material housing 100-1～100-6.In addition, first～the 6th terminal group TG1～TG6 has respectively installation and measuring terminal CDT1, the CDT2 for detection of the installation of first～the 6th printing material housing 100-1～100-6.

First end subgroup TG1 is configured in the first end avris of circuit substrate 450, the second end avris relative with the first end limit that the 6th (being n in a broad sense) terminal group TG6 is configured in circuit substrate 450.Second (being i (i is the integer of 1＜i＜n-1) in a broad sense)～5th (being j (j is the integer of i＜j＜n) in a broad sense) terminal group TG2～TG5 in first～the 6th (being n in a broad sense) terminal group TG1～TG6 jointly is connected with control part 300 by the bus terminals of bus MBS.In addition, first end subgroup TG1 is connected with control part 300 discretely with the bus terminals of bus MBS.In addition, the 6th (being n in a broad sense) terminal group TG6 is connected with control part 300 discretely with the bus terminals of bus MBS.

With above-mentioned the first configuration example similarly, in the printing equipment of the second configuration example, be configured in the first end subgroup TG1 of first end avris of circuit substrate 450 and the 6th terminal group TG6 that is configured in the second end avris relative with the first end limit and be connected with control part 300 discretely with bus MBS respectively.That is, the storage device of the first, the 6th printing material housing 100-1,100-6 is connected with control part 300 with terminal RST, SCK, VDD, VSS, SDA with the storage device of other printing material housing 100-2～100-5 discretely with terminal RST, SCK, VDD, VSS, SDA.

So, even because the reasons such as ink mist in the situation that be positioned at printing material housing 100-1, the 100-6 of end avris, the short circuit between terminal have occured, owing to separating with other printing material housing 100-2～100-5, therefore also can prevent from communicating by letter between control part 300 and storage device 203-2～203-5 exerted an influence.In addition, can prevent from applying high voltage to storage device 203-2～203-5 when installation and measuring.Consequently, can reliably and carry out safely the installation and measuring of printing material housing 100-1～100-6.

In addition, for the printing material housing 100-2～100-5 except the printing material housing that is positioned at the end avris, owing to jointly being connected with control part 300 by bus MBS, therefore can simplify the circuit formation of control part 300 etc.

In the second configuration example, the installation and measuring terminal DT1, the DT2 that are positioned at printing material housing 100-1, the 100-6 of end avris are connected with control part 300 discretely with installation and measuring terminal DT1, the DT2 of other printing material housing 100-2～100-5 in addition.Therefore, can be positioned at reliably the printing material housing 100-1 of end avris, the installation and measuring of 100-6.

2. the formation of circuit

Fig. 6 shows the basic configuration example of the electric formation of the printing equipment in present embodiment.The printing equipment of this configuration example comprises printing material housing (box) 100, circuit substrate 450, control part 300, master control part 400, LVPS 441, high-voltage power supply 442 and display part 430.Control part 300 comprises short-circuit detecting section 310, voltage application portion 320, installation and measuring section 330, CO (box is extracted) test section 340 and communication process section 350.In addition, the printing equipment of present embodiment is not limited to the formation of Fig. 1, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.。

Show a printing material housing 100 as an example in Fig. 6, but the printing equipment of this configuration example can comprise a plurality of printing material housings 100.That is, printing equipment comprises that the storage device 203 that has respectively the memory print material information and a plurality of storage device are with the first～the n (n is the integer more than 2) printing material housing 100-1～100-n of terminal RST, SCK, VDD, VSS, SDA.In addition, also comprise with a plurality of storage devices of the first～the n printing material housing 100-1～100-n being connected with terminal, and storage device 203 is carried out the control part 300 of the control of reading or writing of data.

Circuit substrate 450 comprises terminal group and each terminal of electric connecting terminal subgroup and a plurality of wiring of control part 300 with 9 terminals.Specifically, terminal group comprises reseting terminal CRST, clock terminal CSCK, power supply terminal CVDD, ground terminal CVSS, data terminal CSDA, the first installation and measuring terminal CDT1, the second installation and measuring terminal CDT2, the first short-circuit detecting terminal CCO1 and the second short-circuit detecting terminal CCO2.(installation) is set on circuit substrate 450 control part 300 is arranged.

Control part 300 comprises communication process section 350, and control part 300 carries out the control of reading or writing of data to storage device 203 together with master control part 400.For example, in the situation that master control part 400 is carried out the control that writes or read to the data of storage device 203, communication process section 350 carries out the relaying etc. of the communication of data writing or sense data.In addition, control part 300 comprises installation and measuring section 330, CO test section 340, short-circuit detecting section 310, voltage application portion 320 and high voltage control part 360, carries out installation and measuring, CO detection, short-circuit detecting and high-tensionly the processing such as blocks.Control part 300 can by realizing such as the logic circuit that is made of CMOS transistor etc., can be also the IC apparatus of single-chip.

Master control part 400 comprises CPU410 and memory 420, and master control part 400 is carried out the control of printing treatment.In addition, master control part 400 is via carrying out necessary communicating by letter between bus B US and control part 300.In configuration example shown in Figure 6, control part has been divided into master control part 400 and control part 300, but also can be used as a control part consists of.

Display part 430 is used for the user is carried out the various notices such as installment state of operating state and the box of printing equipment 1000.Display part 430 is arranged on the operating portion 1300 of Fig. 1 for example.

LVPS 441 generates LVPS voltage (the first supply voltage) VDD.The first supply voltage VDD is the common supply voltage (rated voltage 3.3V) that logic circuit uses.High-voltage power supply 442 generates high-voltage power supply voltage (second source voltage) VHV.Second source voltage VHV makes its high voltage (for example rated voltage 42V) that sprays ink for driving print head, also is used for generating the installation and measuring voltage VHO that applies to the first installation and measuring terminal DT1.These voltage VDD, VHV are provided for control part 300, in addition, also offer as required other circuit.Specifically, for example high-voltage power supply voltage VHV is offered the voltage application portion 320 of control part 300 from high-voltage power supply 442, is provided for the first installation and measuring terminal DT1 and the installation and measuring section 330 of box 100 with voltage VHO from the installation and measuring of voltage application portion 320 output.Installation and measuring with voltage VHO than the hot side supply voltage that is provided for storage device 203 (for example 3.3V) height.

Among upper nine terminals that arrange of the substrate 200 (Fig. 3) of printing material housing 100, reseting terminal RST, clock terminal SCK, power supply terminal VDD, data terminal SDA and ground terminal VSS are electrically connected to storage device 203.Storage device 203 is following nonvolatile memories: do not have address terminal, based on from the umber of pulse of the clock signal of clock terminal SCK input with decide the memory cell of access from the director data of data terminal SDA input, and with clock signal synchronization ground from data terminal SDA receive data or from data terminal SDA transmission data.Clock terminal SCK is used for from control part 300 to storage device 203 provides clock signal.

The supply voltage (for example 3.3V) and the ground voltage (0V) that are used for driving storage device 203 from printing equipment 1000 are supplied to power supply terminal VDD and ground terminal VSS.The supply voltage that is used for this storage device 203 of driving is generated and provides based on LVPS 441 by control part 300.

Data terminal SDA is used for exchange data signals between control part 300 and storage device 203.Reseting terminal RST is used for from control part 300 to storage device 203 provides reset signal.

First, second installation and measuring terminal DT1, DT2 use when whether detection printing material housing 100 correctly is installed to box installation portion 1100.Be provided with installation and measuring resistive element RD between the first installation and measuring terminal DT1 and the second installation and measuring terminal DT2.Installation and measuring section 330 based on from the installation and measuring of voltage application portion 320 output with voltage VHO with flow through installation and measuring and detect the installation of printing material housing 100 with the electric current of resistive element RD.Specifically, by putting on the first installation and measuring terminal DT1 with voltage VHO from the installation and measuring of voltage application portion 320 outputs, thereby installation and measuring is applied in the voltage current flowing with resistive element RD, and detects these electric currents by installation and measuring section 330 and detect installation.For the method for this installation and measuring, the back is described in detail.

First, second short-circuit detecting terminal CO1, CO2 are electrically connected to by wiring in the inside of printing material housing 100 (specifically substrate 200).CO test section 340 is such as described later, by detecting the electrically conducting between CO1 and CO2, can detect CO1 and CO2 and whether electrically contact respectively with the corresponding terminal of box installation portion 1100, that is, can detect printing material housing 100 and whether correctly be installed.But, in the printing equipment of present embodiment, be provided with first, second installation and measuring terminal DT1, DT2 and installation and measuring section 330, detect the installation of print cartridge 100 by using their, therefore can omit CO test section 340.When having omitted CO test section 340, when perhaps not carrying out the installation and measuring (box is extracted detection) of having used CO test section 340, CO1 and CO2 are electrically connected to.

In addition, in the following description, the installation and measuring of being undertaken by installation and measuring section 330 is called " installation and measuring ", and the installation and measuring of being undertaken by CO test section 340 is called " box is extracted detection " or " CO detection ".

Be provided with diode D1, D2 between first, second short-circuit detecting terminal CO1, CO2 and detection node ND, but when not carrying out CO detection (box is extracted detection), can via diode, CO1, CO2 directly be connected with detection node ND.

Short-circuit detecting section 310 directly is connected with the first short-circuit detecting terminal CO1 and the second short-circuit detecting terminal CO2, perhaps connects via diode D1, D2 (being given component in a broad sense).Then for example, relatively detecting because the short circuit between at least one at least one and first, second installation and measuring terminal DT1, DT2 in first, second short-circuit detecting terminal CO1, CO2 causes having applied the high voltage (applying of abnormal voltage) that originally can not apply to first, second short-circuit detecting terminal CO1, CO2 based on the voltage of detection node ND and reference voltage.That is, when the voltage ratio reference voltage of detection node ND is high, detect short circuit (abnormal voltage).To high voltage control part 360 output short-circuit detection signal VSHT, high voltage control part 360 is exported control signal VCNT based on short-circuit detection signal VSHT to voltage application portion 320 when detecting short circuit in short-circuit detecting section 310.Voltage application portion 320 stops providing installation and measuring voltage VHO based on the control signal VCNT from high voltage control part 360.

Here, reference voltage is set in the situation that the magnitude of voltage that above-mentioned short circuit does not destroy storage device 203 (perhaps CO test section 340 circuit such as grade) has occured.Thus, short-circuit detecting section 310 detects short circuit before can arriving at the voltage of detection node ND the magnitude of voltage of the circuit that destroys storage device 203 grades.

Communication process section 350 has output circuit OB1～OB4 and imput output circuit IOB.Reseting terminal CRST, clock terminal CSCK, power supply terminal CVDD, ground terminal CVSS output signal or voltage that output circuit OB1～OB4 arranges on the circuit substrate 450 respectively.In addition, imput output circuit IOB carries out the input and output of data-signal to the data terminal CSDA that arranges on circuit substrate 450.Reseting terminal CRST, clock terminal CSCK, power supply terminal CVDD, ground terminal CVSS, data terminal CSDA are connected with reseting terminal RST, the clock terminal SCK, power supply terminal VDD, ground terminal VSS, the data terminal SDA that arrange on printing material housing 100 respectively.The detailed formation of back explanation output circuit OB1～OB4 and imput output circuit IOB.

As shown in front Fig. 3 (A), the first short-circuit detecting terminal CO1 is adjacent with the first installation and measuring terminal DT1, the second short-circuit detecting terminal CO2 is adjacent with the second installation and measuring terminal DT2.Therefore, such as be attached to the terminals side of substrate 200 due to the ink of electric conductivity etc., therefore there are the possibility due to be short-circuited (electric leakages) such as inks of electric conductivity in adjacent two terminal CO1 and DT1 or CO2 and DT2.In addition, also there is the possibility of the first installation and measuring terminal DT1 and power supply terminal VDD short circuit, the second installation and measuring terminal DT2 and data terminal SDA short circuit.

As mentioned above, when carrying out installation and measuring by installation and measuring section 330, installation and measuring is applied in the first installation and measuring terminal DT1 with voltage VHO.Therefore, in the situation that first, second installation and measuring terminal DT1, DT2 and first, second short-circuit detecting terminal CO1, CO2 due to electric conductivity ink etc., short circuit (electric leakage) have occured, exist when installation and measuring and apply high-tension possibility to CO test section 340.In addition, in the situation that first, second installation and measuring terminal DT1, DT2 and power supply terminal VDD or data terminal SDA short circuit exist and apply high-tension possibility to storage device 203.

According to the printing equipment of present embodiment, there is the possibility that is short-circuited between short-circuit detecting section 310 detection terminals, might be short-circuited in the situation that detect, voltage application portion 320 can stop providing installation and measuring voltage VHO.

Specifically, for example shown in the B1 of Fig. 6, when DT1 and CO1 short circuit, from DT1 to CO1, and then flow through the positive direction electric current of diode D1 from CO1 to detection node ND, consequently, the current potential of detection node ND rises.In addition, as shown in the B2 of Fig. 6, when DT2 and CO2 short circuit, from DT2 to CO2, and then flow through the positive direction electric current of diode D2 from CO2 to detection node ND, consequently, the current potential of detection node ND rises.Short-circuit detecting section 310 is by relatively voltage and the reference voltage of this detection node ND can detect short circuit.

In addition, according to the printing equipment of present embodiment, control part 300 is set as high impedance status (vacant state) with a plurality of storage devices with terminal (memory terminal) RST, SCK, VDD, VSS, SDA when voltage application portion 320 applies installation and measuring with voltage VHO to the first installation and measuring terminal DT1.Thus, even for example in the situation that short circuit has occured in DT1 and CO1 and VDD or DT2 and CO2 and SDA, apply high voltage to storage device 203 when installation and measuring before, short-circuit detecting section 310 detects to node ND and has applied overvoltage, therefore control part 300 stops providing installation and measuring voltage VHO based on this, can prevent from applying voltage more than the maximum rated voltage of storage device 203 to storage device 203.

When master control part 400 during from storage device 203 sense datas or to storage device 203 data writing, the communication process section 350 of master control part 400 indication control parts 300 is set as earth level (GND level, VSS level, in a broad sense be the voltage level fixed) with the state of the terminal of terminal RST, SCK, VDD, VSS, SDA from high impedance status with a plurality of storage devices before the access beginning.Then, after a plurality of storage devices were set to earth level with terminal, master control part 400 was carried out reading or writing of data via 350 pairs of storage devices of communication process section 203.

Specifically, after a plurality of storage devices are set as earth level with terminal, by communication process section 350, a plurality of storage devices are controlled to be predetermined voltage level with terminal from earth level, thereby 400 pairs of storage devices of master control part 203 carry out reading or writing of data.Thus, carrying out before the writing or read of storage device 203, all memory terminals can be set as same current potential, therefore can obtain stable memory action.Here predetermined voltage level refers to the voltage level that applies with terminal to each storage device respectively for reading or writing of executing data.

By communication process section 350 to be undertaken with terminal RST, SCK, VDD, VSS, SDA to the setting of high impedance status or fixing voltage level with storage device.Specifically, by output circuit OB1～OB4 and imput output circuit IOB, terminal CRST, CSCK, CVDD, CVSS, CSDA are set as high impedance status or fixing voltage level, thereby storage device is set as respectively high impedance status or fixing voltage level with terminal RST, SCK, VDD, VSS, SDA.Fixing voltage level is earth level (GND level, 0V) for example, but can be also other voltage level.

Voltage application portion 320 carries out stopping applying installation and measuring voltage VHO before reading or writing of data at 300 pairs of storage devices of control part 203.Thus, carry out to storage device 203 read or ablation process in, installation and measuring is not applied to installation and measuring terminal DT1, DT2 with voltage VHO, so can suppress the generation of the noise that caused by VHO.Consequently, can reduce the garble that causes due to noise and memory error etc.

In addition, after the reading or write of 300 pairs of storage device 203 end data of control part, a plurality of storage devices are set to earth level (being the voltage level of fixing in a broad sense) with terminal.Then after a plurality of storage devices were set to earth level with terminal, voltage application portion 320 applied installation and measuring voltage VHO to the first installation and measuring terminal DT1, and a plurality of storage devices are set to high impedance status with terminal.Thus, can be except the time the reading or write of storage device 203 be carried out installation and measuring.

Like this, according to the printing equipment of present embodiment, even in the situation that owing to causing adhering to of the printing materials such as ink etc., short circuit has occured between terminal, also can reduce when installation and measuring applying high-tension possibility to storage device 203.In addition, can before access to storage device 203, the memory terminal be set as same current potential, stop high-tension applying in access process.Consequently, can realize reliable and secure installation and measuring and the memory access of high reliability.

The configuration example of the circuit related with short-circuit detecting and installation and measuring has been shown in Fig. 7.Configuration example shown in Fig. 7 comprises four print cartridges (printing material housing) 100-1～100-4 (IC1～IC4).In addition, the number of print cartridge is not limited to four, can be also two, more than three or five.

Each print cartridge IC1～IC4 has the formation identical with box shown in Figure 6, therefore omits detailed explanation.In addition, the formation of control part 300 is also same with formation shown in Figure 6.But, in Fig. 7, for convenience of explanation, CO test section 340 is divided into CO test section (outlet side) 340a and CO test section (input side) 340b illustrates.In addition, CO test section 340a, 340b can be by realizing such as logic circuit and the analog circuit of the formations such as CMOS transistor.

In the situation that printing equipment comprises a plurality of print cartridges, (for example (for example D1～D5) is connected with the detection node ND of a short-circuit detecting section 310 a plurality of print cartridges via a plurality of diode elements for the first short-circuit detecting terminal CO1 of each print cartridge of IC1～IC4) and the second short-circuit detecting terminal CO2.Specifically, for example in Fig. 7, the CO1 of IC1 is via diode D1, the CO2 of IC1 is connected CO1 and is connected CO1 with IC3 via the CO2 of diode D2, IC2 and is connected with detection node ND respectively via diode D3 with IC2 in addition.The negative electrode of each diode (negative pole) is connected with detection node ND.Thus, short-circuit detecting section 310 can carry out short-circuit detecting in the situation that do not hinder the box that is undertaken by CO test section 340 to extract detection.

Short-circuit detecting section 310 is based on the voltage of detection node ND and relatively detecting of reference voltage.That is, when becoming higher than reference voltage, the voltage of detection node ND detects short circuit (abnormal voltage).To high voltage control part 360 output short-circuit detection signal VSHT, high voltage control part 360 is exported control signal VCNT based on short-circuit detection signal VSHT to voltage application portion 320 when detecting short circuit in short-circuit detecting section 310.Voltage application portion 320 stops providing installation and measuring voltage VHO based on the control signal VCNT from high voltage control part 360.

Resistive element RB1～RB4 is used for the installation and measuring undertaken by installation and measuring section 330, and has respectively different resistance value mutually.Thus, print cartridge is not installed among can detecting box IC1～IC4 on which installation site.Method about this installation and measuring describes in detail in the back.

The box that is undertaken by CO test section 340 (340a, 340b) is extracted detection and is carried out in the following way.In the situation that four print cartridges all are mounted, as shown in Figure 7, the second short-circuit detecting terminal CO2 from the first short-circuit detecting terminal CO1 of IC1 to IC4 becomes the electrically conducting state.Therefore, the signals DP ins from CO test section (outlet side) 340a output is detected as signals DP res by CO test section (input side) 340b.On the other hand, in the situation that among four print cartridges even one be not mounted, owing to being non-electrically conducting, so CO test section (input side) 340b also can't detect signals DP res.Like this, signals DP res whether being detected by CO test section (input side) 340b can detect box and extract.

Fig. 8 is installation and measuring in the printing equipment of present embodiment and the flow chart of memory access.As mentioned above, in the printing equipment of present embodiment, store ink information (for example, the used ink amount in print cartridge, the manufacturing information of print cartridge etc.) in the storage device 203 that arranges on print cartridge 100.This ink information is whenever the cleaning of injector head and the ink in print cartridge are written to storage device 203 by master control part 400 via control part 300 owing to carrying out when printing consumes the power-off etc. of predetermined unit amount or printing equipment.In addition, the request by master control part 400 when the power connection of printing equipment of quantity of ink information is read from storage device 203 via control part 300.This flow process is performed by the control of master control part 400 and control part 300.

During except reference to storage, after the power connection of printing equipment, master control part 400 and control part 300 are set as high impedance status all the time with the memory terminal.In addition, carrying out all the time or termly installation and measuring and CO detects.In addition, CO detection (box is extracted detection) also is performed in the memory access process.

When master control part 400 beginning memory access, at first, stop installation and measuring.The processing (step SP1) that namely stops applying VHO and carry out installation and measuring.

In step SP2, the memory terminal is set as GND level (earth level, VSS level) from high impedance status HZ.At this moment, short circuit has occured in (for example between CO1-VDD, between CO2-SDA) in the situation that between CO terminal (CO1 or CO2) and memory terminal, and CO test section 340 can detect short circuit.

In step SP3, judge whether printing material housing 100 is normal.Judge namely whether printing material housing 100 is installed rightly, and whether be not short-circuited between terminal.Step SP4 after advancing to when normal, error process when undesired.It is processing such as show error messages etc. at display part 430 that mistake is processed.

In step SP4, carry out the memory access to storage device 203.Be that control part 300 provides signal and the supply voltage that needs to each memory terminal, storage device 203 carried out writing of data process or read processing.

In step SP5, judge whether memory access is normally carried out.Specifically, writing fashionablely, sending predetermined timing after writing instruction and data writing at 300 pairs of storage devices 203 of control part, sending from 203 pairs of control parts of storage device 300 and write settling signal.Write settling signal by receiving this, control part 300 judges whether normally to have completed memory access.When reading, owing to being attached with check bit the data that send to control part 300 of reading from storage device 203, therefore can judge by carrying out even-odd check whether the data of reading from storage device 203 are normal.Advance to step SP6 in the normal situation of memory access, error process under deviant circumstance.

When memory access normally finishes, in step SP6, the memory terminal is set as the GND level.Here, can carry out extracting detection by the box that CO test section 340 carries out.At this moment in the situation that short circuit (for example CO1-VDD, CO2-SDA) has occured between terminal, CO test section 340 can detect short circuit.

In step SP7, restart installation and measuring thereby apply installation and measuring to installation and measuring terminal DT1, DT2 with voltage VHO.

In step SP8, the memory terminal is set as high impedance status HZ.Here, in the situation that short circuit (for example DT1-CO1, DT2-CO2) has occured between terminal, short-circuit detecting section 310 can detect short circuit.

As shown in the flow chart of Fig. 8, according to the printing equipment of present embodiment, when printing equipment switches on power, carry out all the time installation and measuring and CO and detect, detect whether box all is mounted and whether box is correctly installed.When memory access, stop applying VHO, the noise when reducing memory access, and just in case installation and measuring terminal DT1, DT2 and memory terminal are short-circuited, can prevent that also VHO is applied in the memory terminal.

By the memory terminal being set as high impedance status when the reference to storage not, if in addition for installation and measuring terminal DT1, DT2 and short-circuit detecting terminal CO1, CO2 short circuit, the memory terminal also may thereby stop applying VHO with the former of installation and measuring terminal DT1, DT2 short circuit so, thereby can reduce the possibility that VHO is applied in storage device 203.Consequently, can realize the memory access of high reliability when carrying out installation and measuring.

In addition; although omitted detailed description; but carry out installation and measuring all the time and box is extracted detection when changing print cartridge; but due to when changing; the memory terminal of print cartridge and the wrong possibility that contacts of the terminal that VHO is provided of printing equipment, thus control part 300 according to the indication of master control part 400 with each terminal (RST, SCK, SDA, VDD, VSS) of memory thus the protection of the memory when being set as earth level and carrying out that under high voltage, box detects.

The detailed configuration example of output circuit OB1～OB4 and imput output circuit IOB has been shown in (A)～Fig. 9 of Fig. 9 (D).(A) of Fig. 9 is the configuration example of OB1, OB2, and (B) of Fig. 9 is the configuration example of OB4, and (C) of Fig. 9 is the configuration example of OB3, and (D) of Fig. 9 is the configuration example of IOB.In addition, output circuit OB1～the OB4 of present embodiment and imput output circuit IOB are not limited to the formation of (D) of (A)～Fig. 9 of Fig. 9, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.

As shown in Fig. 9 (A), output circuit OB1, OB2 comprise P transistor npn npn TP1, TP2 and N-type transistor T N1, TN2, TN3.TP1, TN1 are used for preventing that the element that static discharge (ESD) causes from destroying (electrostatic breakdown).TP2, TN2 controlled signal S1, S2 respectively control, and terminal CSCK (perhaps CRST) is set as high level, low level or high impedance status.Specifically, as S1, when S2 is low level, terminal CSCK (CRST) is set to high level, as S1, when S2 is high level, terminal CSCK (CRST) is set to low level, when S1 be high level and S2 when being low level terminal CSCK (CRST) be set to high impedance status.TN3 controlled signal S3 controls, and when normal, S3 is low level, but becomes high level at S3 when detecting high voltage etc. abnormal, and TN3 moves with buffer as being used for that terminal CSCK (CRST) is pulled down to low level amplification.

As shown in Fig. 9 (B), output circuit OB4 comprises P transistor npn npn TP4 and the N-type transistor T N4 that controlled signal S4 controls.Terminal CVSS is set to VSS level (earth level) when control signal S4 is high level, and terminal CVSS is set to high impedance status when S4 is low level.TP4 is the element that prevents that electrostatic breakdown from using, and TN4 is also as preventing that the element that electrostatic breakdown is used from moving in addition.

As shown in Fig. 9 (C), output circuit OB3 comprises the P transistor npn npn TP5 of controlled signal S5 control and the N-type transistor T N5 that controlled signal S6 controls.As control signal S5, when S6 is low level, terminal CVDD is set to the VDD level, as S5, when S6 is high level, terminal CVDD is set to the VSS level.In addition, when S5 be high level and S6 when being low level terminal CVDD be set to high impedance status.In addition, TP5, TN5 are also as preventing that the element that electrostatic breakdown is used from moving.

As shown in Fig. 9 (D), imput output circuit IOB comprises P transistor npn npn TP6, TP7, TP11 and N-type transistor T N6, TN7, TN8, TN11.TP6, TN6 are the elements that prevents that electrostatic breakdown from using.TP7, TN7 controlled signal S7, S8 respectively control.Specifically, as S7, when S8 is low level, terminal CSDA is set to high level, as S7, when S8 is high level, terminal CSDA is set to low level, when S7 be high level and S8 when being low level terminal CSDA be set to high impedance status.In addition, TP11 and TN11 consist of transmission gate circuit (analog switch), are switched on or disconnect by control signal S11, S12.Specifically, when terminal CSDA is used as lead-out terminal, become off-state thereby S11 is set to high level, S12 is set to the low level transmission gate circuit.On the other hand, when terminal CSDA is used as input terminal, become on-state thereby S11 is set to low level, S12 is set to the high level transmission gate circuit, the data-signal that is input to terminal CSDA can pass through transmission gate circuit.

Thus, output circuit OB1～OB4 and the imput output circuit IOB of (the A)～Fig. 9 by Fig. 9 (D), can when installation and measuring, memory terminal RST, SCK, VDD, VSS, SDA be set as high impedance status, be set as VSS level (being the voltage level of fixing in a broad sense) before reference to storage.In addition, control signal S1～S9, S11, S12 are generated by the flow process (Fig. 8) of control part 300 according to above-mentioned installation and measuring and memory access.

Figure 10 illustrates the detailed configuration example of short-circuit detecting section 310 and voltage application portion 320.Short-circuit detecting section 310 comprises comparator C MP and resistive element RS.In addition, voltage application portion 320 comprises P transistor npn npn TP.In addition, the formation that the short-circuit detecting section 310 of present embodiment and voltage application portion 320 are not limited to Figure 10, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.。

As mentioned above, owing to being short-circuited etc., when abnormal voltage is applied in short-circuit detecting terminal CO1, CO2, produce than the high voltage of ground voltage (low potential side supply voltage) VSS (for example 0V) at detection node ND.The voltage of detection node ND is applied in the input terminal (+) of comparator C MP.In addition, another input terminal (-) of comparator C MP has been applied in reference voltage VREF.

When the voltage ratio reference voltage VREF of input terminal (+) hangs down, comparator C MP output low level (electronegative potential level) is as short-circuit detection signal VSHT, when the voltage ratio reference voltage VREF of input terminal (+) was high, output high level (high potential level) was as short-circuit detection signal VSHT.Therefore, when short circuit had occured, the voltage of detection node ND became higher than reference voltage VREF, so short-circuit detection signal VSHT is set to high level.Reference voltage VREF is set to the magnitude of voltage that can not destroy storage device 203 grades when short circuit has occured.

When short-circuit detecting section 310 detected short circuit, when namely short-circuit detection signal VSHT was changed to high level from low level, high voltage control part 360 made control signal VCNT be changed to high level from low level.

The source electrode of the P transistor npn npn TP of voltage application portion 320 is connected with high-voltage power supply node VHV, to the control signal VCNT of grid input from high voltage control part 360.Transistor T P is on-state when control signal VCNT is low level, therefore from drain electrode output installation and measuring voltage VHO.On the other hand, when control signal VCNT is high level, namely become off-state in the situation that detect short circuit transistor T P, therefore high-tension providing be provided.Therefore, when short-circuit detecting section 310 detects short circuit, be set to high level from the control signal VCNT of high voltage control part 360, transistor T P becomes off-state, consequently, stops providing installation and measuring voltage VHO.

In case stop providing installation and measuring voltage VHO, the first installation and measuring terminal DT1 of printing material housing 100 no longer is applied in high voltage, and therefore the voltage drop of detection node ND is low level when the voltage of detection node ND uprises due to the short circuit of terminal DT1 and terminal CO1.At this moment, short-circuit detection signal VSHT becomes low level again, but high voltage control part 360 continues to remain high level with control signal VCNT.Thus, can be in the situation that short circuit has occured between terminal detect short circuit and stop providing high voltage.

3. the method for installation and measuring

(A) of Figure 11, (B) of Figure 11 are the figure of method of the installation and measuring of the print cartridge (printing material housing) in the printing equipment of explanation present embodiment.In (A) of Figure 11, show the state that the box IC1～IC4 of the box installation portion 1100 that can be installed on printing equipment is all installed.The installation and measuring of four box IC1～IC4 is set to identical value R with the resistance value of resistive element RD.And be provided with respectively resistive element RB1～RB4 that the installation and measuring with each box is connected in series with resistive element RD.The resistance value of these resistive elements RB1～RB4 is set to different value mutually.Specifically, among these resistive elements RB1～RB4, the resistance value of the resistive element RBn corresponding with the individual box ICn of n (n=1～4) is set to (2 ⁿ-1) R (R is fixed value).Consequently, form with being connected in series of resistive element RD and resistive element RBn by the installation and measuring in n box and have resistance value 2 ⁿThe resistance of R.For n (2 of the individual box of n=1～N) ⁿThe relative installation and measuring of the resistance of R section 330 is by connection parallel with one another.The combined resistance 701～704 that also will be connected in series with resistive element RD and resistive element RB1～RB4 by installation and measuring in addition, and form is referred to as " resistance ".

When with the bias voltage of installation and measuring section 330 during as VREF, the detection electric current I that detects in installation and measuring section 330 _DETThe value (VHO-VREF) that obtains divided by the combined resistance value Rc of these four resistance 701～704 of voltage (VHO-VREF)/Rc.Here, when the number of establishing box is N, when N box all is mounted, detect electric current I _DETProvide by following formula.

[several 1]

$I_{\mathrm{DET}}=\frac{\mathrm{VHO}-\mathrm{VREF}}{R_c}---\left(1\right)$

[several 2]

$R_c=\mathrm{<figure-callout\; id="1"\; label="R"\; filenames="HSA00000799033500061.png,HSA00000799033500091.png"\; state="\{\{state\}\}">R</figure-callout>}\frac{1}{{\mathrm{\&Sigma;}}_{j=1}^{\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="HSA00000799033500061.png,HSA00000799033500091.png"\; state="\{\{state\}\}">N</figure-callout>}}\frac{1}{2^j}}---\left(2\right)$

If there is more than one box not to be mounted, correspondingly combined resistance value Rc rises so therewith, detects electric current I _DETDescend.

(B) of Figure 11 shows the installment state and detection electric current I of box IC1～IC4 _DETRelation.The transverse axis of figure shows 16 kinds of installment states, and the longitudinal axis shows the detection electric current I under these installment states _DETValue.16 kinds of installment states with at random select 1～4 and 16 combinations obtaining are corresponding from four box IC1～IC4.In addition, each combination with these combinations is called " subset ".Detect electric current I _DETIt is the current value that to identify uniquely these 16 kinds of installment states.In other words, be set so that from each resistance value of four resistance 701～704 corresponding to four box IC1～IC4 16 kinds of installment states that four boxes can be obtained are endowed mutually different combined resistance value Rc.

If four box IC1～IC4 are all installment state, detect so electric current I _DETBe its maximum Imax.On the other hand, under the state that only corresponding with the resistance 704 of resistance value maximum box IC4 is not mounted, detect electric current I _DETBe 0.93 times of maximum Imax.Therefore, detect electric current I if check _DETWhether be, so just can be detected four box IC1～IC4 and whether all be mounted by more than predefined threshold current Ithmax as the value between these two current values.In addition, using the reason of the high voltage VHO of supply voltage (approximately 3.3V) than common logic circuit for installation and measuring is to detect electric current I by expansion _DETDynamic range improve accuracy of detection.

Electric current I will detect in installation and measuring section 330 _DETConvert digital detection signal SI to _DET, with this digital detection signal SI _DETSend to CPU410 (Fig. 6).CPU410 can be according to this digital detection signal SI _DETValue judge it is any of 16 kinds of installment states.Be not mounted in the situation that be judged to be more than one box, CPU410 show on display part 430 expression this not the information of installment state (word or image) notify the user.

The installation and measuring processing and utilizing of above-mentioned box: according to relevant to N box 2 ^NPlant installment state and determine uniquely combined resistance value Rc, and correspondingly determine uniquely to detect electric current I _DETHere, the allowable error of supposing the resistance value of resistance 701～704 is ε.In addition, when the first combined resistance value of establishing under the state that box IC1～IC4 all is mounted is Rc1, when only the second combined resistance value under the 4th state that box IC4 is not mounted was Rc2, Rc1＜Rc2 set up (Figure 11 (B)).Preferred this concerns Rc1＜Rc2 in the resistance value of each resistance 701～704 in the situation that also establishment of change in the scope of allowable error ± ε.At this moment, the poorest condition is in the situation that consider allowable error ± ε, and the first combined resistance value Rc1 obtains its maximum Rc1max, and the second combined resistance value Rc2 obtains the situation of its minimum of a value Rc2min.In order to identify these combined resistance values Rc1max, Rc2min, only need to satisfy Rc1max＜Rc2min condition and get final product.Formula below deriving from this condition Rc1max＜Rc2min.

[several 3]

$\mathrm{\&epsiv;}<\frac{1}{4(2^{N-1}-1)}---\left(3\right)$

That is, if allowable error ± ε satisfies (3) formula, just can guarantee all the time to determine uniquely combined resistance value Rc according to the installment state of N box, and correspondingly determine uniquely to detect electric current I _DETBut the allowable error of the resistance value in actual design is preferably set to the little value of value than the right of (3) formula.In addition, also can not carry out research as above, and the allowable error of the resistance value of resistance 701～704 is set as fully little value (for example value below 1%).

Figure 12 is the detailed configuration example of installation and measuring section 330 of the printing equipment of present embodiment.Installation and measuring section 330 comprises current-voltage converter section 710, voltage comparing section 720, comparative result storage part 730 and voltage correction portion 740.In addition, the installation and measuring section 330 of present embodiment is not limited to the formation of Figure 12, can implement by following various distortion, as omit its inscape a part, change into other inscape, append other inscape etc.

Current-voltage converter section 710 is the see-saw circuits that are made of operational amplifier 712 and feedback resistance R11.The output voltage V of operational amplifier 712 _DETProvide by following formula.

[several 4]

$V_{\mathrm{DET}}=\mathrm{VREF}-I_{\mathrm{DET}}\&CenterDot;\mathrm{<figure-callout\; id="11"\; label="R"\; filenames="HSA00000799033500091.png"\; state="\{\{state\}\}">R</figure-callout>}11$

$=\mathrm{VREF}-(\mathrm{VHO}-\mathrm{VREF})\frac{R11}{R_c}---\left(4\right)$

Here, VHO is the output voltage of voltage application portion 320 (Fig. 6), and Rc is the combined resistance of four resistance 701～704 (Figure 11 (A)).This output voltage V _DETHave and detect electric current I _DETCorresponding magnitude of voltage.

In addition, the voltage V that provides by (4) formula _DETExpression will be based on detecting electric current I _DETVoltage (I _DETR11) the anti-phase and value that obtains.Therefore, can append inverting amplifier to current-voltage converter section 710, and export by this inverting amplifier that appends voltage V _DETAnti-phase and the voltage that obtains is as the output voltage of current-voltage converter section 710.The absolute value of the magnifying power of the inverting amplifier that this appends is preferably 1.

Voltage comparing section 720 comprises threshold voltage generating unit 722, comparator 724 (operational amplifier) and switch control portion 726.In a plurality of threshold voltage vt h (j) that obtain by a plurality of resistance R 1～Rm dividing potential drop reference voltage VREF one is selected and exported to threshold voltage generating unit 722 by change-over switch 723.Detection electric current I under 16 kinds of installment states shown in these a plurality of threshold voltage vt h (j) and identification Figure 11 (B) _DETThe threshold value of value suitable.Comparator 724 is the output voltage V of current-voltage converter section 710 relatively _DETWith from the threshold voltage vt h (j) of threshold voltage generating unit 722 output and export the comparative result of 2 values.

Switch control portion 726 is based on output voltage V _DETSwitching next with the comparative result of threshold voltage vt h (j) should be from the control of the magnitude of voltage Vth (j) of threshold voltage generating unit 722 outputs.

Comparative result storage part 730 arranges sign (for example writing 1) based on a suitable position of comparative result bit register 734 in from 2 values of voltage comparing section 720 output.The switching timing of this change-over switch 732 is specified by switch control portion 726.Bit register 734 has each box that expression can be installed on printing equipment and has or not N (N=4 here) box detecting position of installation and the abnormality mark position that expression detects abnormal current value.The abnormality mark position is in the situation that compare with current value I max (Figure 11 (B)) under state that whole boxes all are mounted that large current flowing is arranged significantly is high level.But the abnormality mark position can be omitted.A plurality of place values of preserving in bit register 734 are used as digital detection signal SI _DET(sensed current signal) sends to the CPU410 (Fig. 6) of master control part 400.CPU410 is according to this digital detection signal SI _DETPlace value judge whether each box is mounted.As previously mentioned, digital detection signal SI _DETFour place values represent whether each box is mounted.Therefore, CPU410 can be according to digital detection signal SI _DETEach place value directly determine each box and whether be mounted.

Voltage comparing section 720 and the comparative result storage part 730 so-called A-D converter sections of the two formation.Can adopt known other various formation to replace the voltage comparing section 720 shown in Figure 12 and comparative result storage part 730 as the A-D converter section.

Voltage correction portion 740 be for make a plurality of threshold voltage vt h (j) that generate in threshold voltage generating unit 722 follow installation and measuring with the change of voltage VHO to its circuit of revising.Voltage correction portion 740 is used as the see-saw circuit that comprises operational amplifier 742 and two resistance R 21, R22 and consists of.The reversed input terminal of operational amplifier 742 is via the output voltage V HO of input resistance R22 input voltage applying unit 320, the sub-input reference voltage VREF of non-inverting input.At this moment, the output voltage AGND of operational amplifier 742 provides by following formula.

[several 5]

$\mathrm{AGND}=\mathrm{VREF}-(\mathrm{VHO}-\mathrm{VREF})\frac{R21}{R22}---\left(5\right)$

This voltage AGND is used as the reference voltage AGND of the low voltage side of threshold voltage generating unit 722.For example, if establish VREF=2.4V, VHO=42V, R21=20k Ω, R22=400k Ω, AGND=0.42V so.More above-mentioned (4) formula and (5) formula are appreciated that the reference voltage AGND and detection magnitude of voltage V of the low voltage side of threshold voltage generating unit 722 _DETSimilarly the value according to the output voltage V HO of voltage application portion 320 changes.These two voltage AGND, V _DETDifference be that difference due to resistance ratio R21/R22, R11/Rc produces.If use such voltage correction portion 740, though supply voltage VHV because certain reason change, a plurality of threshold voltage vt h (j) that passing threshold voltage generating unit 722 generates also can follow the change of supply voltage VHV and change.Consequently, detect magnitude of voltage V _DETThe two is followed the change of supply voltage VHV and changes with a plurality of threshold voltage vt h (j), therefore can access the comparative result of the correct installment state of expression in voltage comparing section 720.Particularly, equate if set the value of resistance ratio R21/R22 and resistance ratio R11/Rc1 (the combined resistance value when Rc1 is whole boxes installation), can make so and detect magnitude of voltage V _DETThe change that the mode that changes with almost identical amplitude of variation with a plurality of threshold voltage vt h (j) is correctly followed supply voltage VHV.But voltage correction portion 740 can be omitted.

As mentioned above, printing equipment according to present embodiment, in the situation that use a plurality of print cartridges, even due to ink mist etc. and in the situation that be short-circuited between the terminal of the printing material housing of the end avris of circuit substrate, also can prevent from applying high voltage to other the storage device etc. of printing material housing.And when installation and measuring, in the situation that between the terminal of print cartridge, short circuit has occured, stop thereby this short circuit can being detected the high voltage that provides installation and measuring to use.In addition, owing to can stopping applying high voltage when the access to storage device, therefore can suppress the generation of noise.Consequently, can reliably and carry out safely the installation and measuring of print cartridge.

In addition, the control of carrying out by control part 300 is such as installation and measuring, CO detection, short-circuit detecting, high-tensionly the control that needs such as block and also can be carried out by master control part 400.

In addition, understand in detail as mentioned above present embodiment, but those skilled in the art can easily understand the various deformation that can not break away from fact new item of the present invention and effect.Therefore, such variation all within the scope of the present invention.For example, in specification or accompanying drawing, no matter can both replace to this different term in any position of specification or accompanying drawing from the term that the different term of broad sense or synonym is more put down in writing together at least one times.Printing equipment and printing equipment also are not limited to formation, the action of circuit substrate the mode that illustrates by present embodiment in addition, can implement various distortion.

Claims (11)

1. a printing equipment, is characterized in that, comprising:

The first printing material housing～n printing material housing has respectively storage device and a plurality of storage device terminal of memory print material information; And

Control part is connected with terminal with described a plurality of storage devices of described the first printing material housing～described n printing material housing, and described storage device is carried out the control of reading or writing of data,

Described a plurality of storage devices of each of the i printing material housing in described the first printing material housing～described n printing material housing～j printing material housing jointly are connected with described control part by bus with terminal,

Described a plurality of storage devices of described the first printing material housing are connected with described control part with described bus discretely with terminal,

Described a plurality of storage devices of described n printing material housing are connected with described control part with described bus discretely with terminal,

Wherein, n is the integer more than 2, and i is the integer of 1＜i＜n-1, and j is the integer of i＜j＜n.

2. printing equipment as claimed in claim 1, is characterized in that,

Comprise circuit substrate, described control part is installed on described circuit substrate, described circuit substrate has the bus terminals of the first end subgroup that is connected with terminal with described a plurality of storage devices of described the first printing material housing～described n printing material housing～n terminal group and described bus

Described first end subgroup is configured in the first end avris of described circuit substrate,

The second end avris relative with described first end limit that described n terminal group is configured in described circuit substrate.

3. printing equipment as claimed in claim 1 or 2, is characterized in that,

Described i printing material housing is the second printing material housing in described the first printing material housing～described n printing material housing,

Described j printing material housing is the n-1 printing material housing in described the first printing material housing～described n printing material housing.

4. printing equipment as described in any one in claims 1 to 3, is characterized in that,

Described a plurality of storage devices of described i printing material housing～described j printing material housing comprise respectively clock terminal, data terminal, the first power supply terminal and second source terminal with terminal,

Described clock terminal, described data terminal, described the first power supply terminal and described second source terminal jointly are connected with described control part by described bus respectively.

5. printing equipment as claimed in claim 4, is characterized in that,

Described a plurality of storage devices of described i printing material housing～described j printing material housing also comprise respectively reseting terminal with terminal.

6. printing equipment as described in any one in claim 1 to 5, is characterized in that,

Described control part comprises the installation and measuring section of the installation that detects described the first printing material housing～described n printing material housing,

Described i printing material housing～described j printing material housing comprises respectively the installation and measuring terminal,

Described installation and measuring terminal jointly is connected with described control part.

7. printing equipment as claimed in claim 6, is characterized in that,

The described installation and measuring terminal of the k printing material housing in described i printing material housing～described j printing material housing and the described installation and measuring terminal of k+2 printing material housing jointly are connected with described control part, wherein, k is the integer of i≤k≤j-2.

8. printing equipment as described in claim 6 or 7, is characterized in that,

When the installation of described the first printing material housing～described n printing material housing detected in described installation and measuring section, described control part was set as high impedance status with described a plurality of storage devices with terminal.

9. a printing equipment circuit substrate, is characterized in that, comprising:

First end subgroup～n terminal group is connected with the first printing material housing～n printing material housing; And

Bus terminals jointly is connected the i terminal group in described first end subgroup～described n terminal group～j terminal group with control part,

Described first end subgroup is connected with described control part discretely with described bus terminals,

Described n terminal group is connected with described control part discretely with described bus terminals,

Wherein, n is the integer more than 2, and i is the integer of 1＜i＜n-1, and j is the integer of i＜j＜n.

10. printing equipment circuit substrate as claimed in claim 9, is characterized in that,

Described first end subgroup～described n terminal group comprises respectively be used to a plurality of storage device terminals of accessing described the first printing material housing～storage device that described n printing material housing has.

11. printing equipment circuit substrate as described in claim 9 or 10 is characterized in that,

Described first end subgroup～described n terminal group has respectively the installation and measuring terminal for detection of the installation of described the first printing material housing～described n printing material housing.

Images