CN103926499B - Device and method for automatically detecting multi-time programming line - Google Patents
Device and method for automatically detecting multi-time programming line Download PDFInfo
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- CN103926499B CN103926499B CN201310739751.0A CN201310739751A CN103926499B CN 103926499 B CN103926499 B CN 103926499B CN 201310739751 A CN201310739751 A CN 201310739751A CN 103926499 B CN103926499 B CN 103926499B
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- 238000001514 detection method Methods 0.000 claims abstract description 196
- 238000012360 testing method Methods 0.000 claims description 38
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Abstract
The invention discloses a device and a method for automatically detecting a multi-time programming line, wherein the device comprises: the detection voltage control unit and the state indicating unit are turned on or turned off according to a control signal sent by the main control unit; the detection voltage control unit outputs detection voltage which is transmitted to the multi-time programming line through the first resistor and the write-in voltage access point; the window comparison control unit detects whether the first voltage at the write-in voltage access point is within a preset voltage range or not, and outputs a detection result to the main control unit; and the state indicating unit prompts that the multi-time programming line has a fault when the detection result is that the first voltage is not in the preset voltage range. The invention can realize the detection of the multi-time programming circuit before the multi-time programming process is carried out, is beneficial to quickly searching the failure reason of the multi-time programming process, and can also ensure that the detection efficiency is high, the operability is strong and the cost is low.
Description
Technical field
The present invention relates to display technology field, more particularly, to a kind of automatic detection repeatedly programs device and the side of circuit
Method.
Background technology
During display device development, display effect is always very important aspect.At present, by display dress
Put driving ic(integrated circuit, integrated circuit) middle setting repeatedly programming (multiple time
Programming, abbreviation mtp) unit, for improving the display effect of display device.
In prior art, when display device being driven the multiple programming unit in ic automatically carry out multiple programming process, no
Multiple programming circuit can be detected in advance, but directly be carried out multiple programming operation, repeatedly programming circuit is referred to repeatedly program
Circuit between unit and write voltage access point, and write voltage access point outside display device driving ic.So, when
Repeatedly it is impossible to quick positioning is led due to be repeatedly programming circuit out of joint or outside due to other during programming process failure
Cause.If necessary to multiple programming wireline inspection, usually adopt circuit tester measurement at write voltage access point repeatedly to program
The earth impedance of unit, the efficiency of this detection is low, poor operability and high cost.
Content of the invention
In view of this, the embodiment of the present invention provides a kind of automatic detection repeatedly to program device and the method for circuit, solves
Multiple programming circuit is not detected before in prior art multiple programming process being carried out to multiple programming unit and examined
Survey repeatedly program circuit method efficiency is low, the technical problem of poor operability and high cost.
In a first aspect, embodiments providing the device that a kind of automatic detection repeatedly programs circuit, described multiple volume
Journey circuit drives the circuit between multiple programming unit and write voltage access point in ic for display device, and described device includes:
Main control unit, detection voltage control unit, first resistor, window compare control unit and state indication unit,
Wherein,
Described detection voltage control unit and state indication unit are opened according to the control signal that described main control unit sends
Open or close；
Described detection voltage control unit exports detection voltage, by described first resistor and write voltage access point transmission
To described multiple programming circuit；
Described window compare control unit detect said write voltage access point at first voltage whether in default electricity
In the range of pressure, and testing result is exported to described main control unit；
It is described first voltage not in described default voltage range that described state indication unit works as described testing result
When point out described multiple programming circuit faulty.
Second aspect, the embodiment of the present invention additionally provides a kind of automatic detection of employing first aspect and repeatedly programs circuit
Device realizes the method that automatic detection repeatedly programs circuit, and described multiple programming circuit drives in ic for display device and repeatedly programs
Circuit between unit and write voltage access point, methods described includes:
Detection voltage control unit is opened and is exported from described detection voltage control unit and is used for detecting by main control unit
The detection voltage of described multiple programming circuit；
Window compare control unit detect said write voltage access point at first voltage whether in default voltage model
In enclosing, and testing result is exported to described main control unit；
If described testing result be described first voltage in described default voltage range, described main control unit
Described detection voltage control unit is closed；
If described testing result be described first voltage not in described default voltage range, described main control list
First driving condition indicating member is to point out described multiple programming circuit faulty.
The automatic detection that the embodiment of the present invention proposes repeatedly programs device and the method for circuit, by detection voltage control
Unit is to multiple programming circuit output detection voltage, then compares at control unit detection write voltage access point the through window
Whether one voltage exports to main control unit in default voltage range and by testing result, if testing result is the first electricity
It is pressed in default voltage range, then main control unit is closed detection voltage control unit and opened and be repeatedly programmed into voltage control
, to provide write voltage for multiple programming unit, otherwise, main control unit driving condition indicating member is to point out repeatedly for unit processed
Programming circuit is faulty, so not only multiple programming circuit can be detected before carrying out multiple programming process, favorably
In the reason quick lookup multiple programming process failure, but also the efficiency high of detection, workable and low cost can be made.
Brief description
By reading the detailed description that non-limiting example is made made with reference to the following drawings, other of the present invention
Feature, objects and advantages will become more apparent upon:
Fig. 1 be first embodiment of the invention automatic detection repeatedly program circuit device structural representation；
Fig. 2 is the equivalent structural representation for write voltage access point for the multiple programming unit of first embodiment of the invention
Figure；
Fig. 3 be second embodiment of the invention automatic detection repeatedly program circuit method flow chart；
Fig. 4 is the working timing figure of each unit of second embodiment of the invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than full content is illustrate only in description, accompanying drawing.
Show the first embodiment of the present invention in fig. 1 and 2.
First embodiment of the invention provides the device that a kind of automatic detection repeatedly programs circuit.Fig. 1 is the present invention first
The automatic detection of embodiment repeatedly programs the structural representation of the device of circuit.Referring to Fig. 1, repeatedly programming circuit 12(is in figure
The part being represented with the line segment darkening) for display device drive in ic10 repeatedly programming unit 11 and write voltage access point a it
Between circuit, described automatic detection repeatedly programs the part that the device 20(of circuit surrounds in figure dotted line frame) include: master control
Unit 21 processed is connected with main control unit 21 and accepts the detection voltage control unit 22 of control signal, controls list with detection voltage
The first resistor 23 of unit's series connection, the window being connected with main control unit 21 compares control unit 24 and the shape being connected with main control unit 21
State indicating member 25, wherein, described detection voltage control unit 22 and state indication unit 25 are according to described main control unit 21
The control signal sending is turned on and off；Described detection voltage control unit 22 exports detection voltage, by described first resistor
23 and write voltage access point a send described multiple programming circuit 12 to；The control unit 24 that compares described window is write described in detecting
Enter first voltage at voltage access point a whether in default voltage range, and testing result is exported to described main control
Unit 21；It is described first voltage not in described default voltage range that described state indication unit 25 works as described testing result
When point out described multiple programming circuit 12 faulty.
It should be noted that in FIG, control unit 23 and state are compared by detection voltage control unit 22, window
Indicating member 25 respectively the line with arrow and main control unit 21 between illustrate these units operationally with main control list
The relation of unit 21, is respectively directed to the band arrow of detection voltage control unit 22 and state indication unit 25 by main control unit 21
Line represent the control planning to detection voltage control unit 22 and state indication unit 25 for the main control unit 21, that is, control it
Be turned on and off；Control unit 23 is compared by window point to the line with arrow of main control unit 21 and represent that window compares
Control unit 23 will export to (or feeding back to) main control list to the testing result of first voltage at write voltage access point a
Unit 21.
Specifically, detection voltage control unit 22 output detection voltage, by first resistor 23 and write voltage access point a
Send multiple programming circuit 12 to, because multiple programming circuit 12 is connected with multiple programming unit 11, wherein, repeatedly program circuit
12 resistance value of itself can compared with the resistance value of first resistor 23 with the resistance value of the resistance to earth of multiple programming unit 11
To ignore, so, the detection voltage of output is to be carried in the two ends of first resistor 23 and multiple programming unit 11, the first electricity
Resistance 23 and multiple programming unit 11 carry out partial pressure to detection voltage, and the first voltage at write voltage access point a is exactly to examine
Survey partial pressure on multiple programming unit 11 for the voltage, therefore, by detecting to first voltage, and by first voltage with pre-
If voltage is compared the detection that can realize the state to multiple programming circuit 12.
Additionally, window compare control unit 24 detection write voltage access point a at first voltage whether in default electricity
Detection method in the range of pressure is: first voltage and default voltage range is compared thus judging that whether first voltage exists
In default voltage range.If first voltage is in default voltage range, window compares control unit 24 to main control
Unit 21 output high level with represent testing result for first voltage in default voltage range, show just repeatedly programming circuit
Often, otherwise, window compares control unit 24 to main control unit 21 output low level to represent testing result for first voltage not
In default voltage range, show repeatedly to program circuit extremely.
Also, it should be noted after each multiple programming unit 11 is made, all can have the resistance to earth of a determination
Resistance value, that is, give a multiple programming unit, then the resistance value of its resistance to earth is known and determines.To many
When secondary programming circuit 12 is detected, the multiple programming unit 11 in ic10 is driven to access for write voltage positioned at display device
For point a, a resistance to earth can be equivalent to.Fig. 2 is multiple programming unit according to embodiments of the present invention for write electricity
The equivalent structural representation of crimping access point.Referring to Fig. 2, multiple programming unit 11 is equivalent to one for write voltage access point a
Individual resistance to earth 11 ', in following description, is related to resistance to earth 11 ' and is just used to refer to for multiple programming unit 11.In order to
Description is convenient, represents the resistance value of first resistor 23 with r1, and the resistance value representing resistance to earth 11 ' with r2 represents write with va
First voltage at voltage access point a, represents the detection voltage of detection voltage control unit 22 output with vt.
When detection voltage control unit 22 output detection voltage vt, because first resistor 23 and resistance to earth 11 ' are connected,
Then detection voltage vt exporting is to be carried in the two ends of this two series resistances.According to the feature of series resistance partial pressure, detect
Partial pressure on resistance to earth 11 ' for the voltage vt is first voltage va, and then first voltage va can be with detection voltage vt, the first electricity
Resistance value r2 of resistance value r1 of resistance 23 and resistance to earth 11 ' is expressed as: va=vt × r2/ (r1+r2).In the present embodiment, lead to
Cross the relational expression of this first voltage va and detection voltage vt, to obtain the magnitude of voltage of first voltage va, and to pass through again
Window compares control unit 24 detection first voltage va whether in default voltage range, thus realizing to multiple programming circuit
The detection of 12 state.
Specifically, when designing resistance value r1 of first resistor 23, can be carried out according to resistance value r2 of resistance to earth 11 '
R1 generally can be designed to close to r2, first voltage va so can be made to be located at default voltage range as much as possible by design
Centre position, be easy to first voltage va is detected.
The device detecting repeatedly programming circuit as above, can carry out automatic detection to multiple programming circuit, thus
Make the efficiency high of detection, workable and low cost.
In the present embodiment, alternatively, described device 20 also includes repeatedly being programmed into voltage control unit 26, wherein,
The described voltage control unit 26 that is repeatedly programmed into is turned on and off simultaneously according to the control signal that described main control unit 21 sends
And when described testing result be described first voltage in described default voltage range when carry for described multiple programming unit 11
For writing voltage.
It should be noted that in FIG, pointed to the band being repeatedly programmed into voltage control unit 26 by main control unit 21
The line of arrow represents main control unit 21 to the control planning being repeatedly programmed into voltage control unit 26, that is, control its unlatching
Or close.
When testing result for first voltage va in default voltage range when, show repeatedly to program circuit 12 do not have therefore
Barrier, now main control unit 21 control and be repeatedly programmed into voltage control unit 26 and open, provide for multiple programming unit 11 and write
Enter voltage, carry out multiple programming process.So can be implemented in before multiple programming process is carried out to multiple programming unit 11, first
Carry out to the multiple detection programming circuit 12, when multiple programming circuit 12 does not have fault, then carry out multiple programming process it is ensured that
The efficiency of multiple programming process；If multiple programming process failure, can clear and definite not be that the fault of repeatedly programming circuit 12 is made
Become, such that it is able to, the reason quick lookup multiple programming process failure, quickly solve failure problems.
Alternatively, described repeatedly it is programmed into the dc-dc liter that voltage control unit 26 including but not limited to has Enable Pin
Volt circuit.The described dc-dc booster circuit with Enable Pin is the DC-to-DC being turned on and off according to control signal
Booster circuit.By making using the dc-dc booster circuit with Enable Pin to be repeatedly programmed into voltage control unit 26
Automatically turned on according to the control signal that main control unit 21 sends or close, and after unlatching, according to multiple programming unit 11
The size of required write voltage, can be obtained by this dc-dc booster circuit.Dc-dc with regard to having Enable Pin rises piezoelectricity
The possible structure on road and concrete principle, are well known to those skilled in the art, will not be described here.
Alternatively, when the control signal of described main control unit 21 is high level, described repeatedly it is programmed into voltage control
Unit 26 processed is opened；When the control signal of described main control unit 21 is low level, described repeatedly it is programmed into voltage control
Unit 26 is closed.The control signal being sent according to main control unit 21 due to being repeatedly programmed into voltage control unit 26 open or
Close, therefore, it can as needed the Enable Pin being repeatedly programmed into voltage control unit 26 is configured, can be as master
When the control signal of control unit 21 is high level, repeatedly it is programmed into voltage control unit 26 and opens, when main control unit 21
Control signal be low level when, be repeatedly programmed into voltage control unit 26 and close；Can also be when main control unit 21
When control signal is low level, repeatedly it is programmed into voltage control unit 26 and opens, when the control signal of main control unit 21 is
During high level, repeatedly it is programmed into voltage control unit 26 and closes, be repeatedly programmed into thus realizing main control unit 21 and controlling
Voltage control unit 26 is automatically turned on or is closed.
Alternatively, described default voltage range is more than vl and to be less than vh, and wherein, vl is that described display device drives
The i/o port working voltage of ic10, vh is described detection voltage.When detecting to multiple programming circuit 12, first voltage
The state of va and corresponding multiple programming circuit 12 has following four possible: (1) first voltage va is detection voltage vt, shows many
The state of secondary programming circuit 12 is open circuit, faulty；(2) first voltage va is va=vt × r2/ (r1+r2), shows repeatedly to program
The state of circuit 12 is normal, does not have fault；(3) first voltage va is equal to 0, shows repeatedly to program circuit 12 and ground short circuit (can
Can be connected with the ground wire of surrounding), faulty；(4) first voltage va drives the i/o port working voltage of ic10 for display device,
Show that repeatedly programming circuit 12 is connected with the i/o port of display device driving ic10, faulty.By to above-mentioned first voltage
The analysis of four kinds of situations of state of va and corresponding multiple programming circuit 12, can arrange vl and drive ic10 end for display device
Mouth running voltage, vh is detection voltage vt.It is all because display device drives ic10 port working voltage and detection voltage vt
Know, therefore, default voltage range is also known and is to determine.For example, if display device drives ic10 port work
Make voltage and be 1.8 volts, detection voltage vt is set to 6.6 volts, then vl is 1.8 volts, vh is 6.6 volts, and default voltage range is big
It is less than 6.6 volts in 1.8 volts；If resistance value r1 of first resistor 23 is 500 kilo-ohms, resistance value r2 of resistance to earth 11 ' is 500
Kilo-ohm, then when first voltage va detecting is 3.3 volts, then this first voltage va, in default voltage range, works as detection
To first voltage va be less than or equal to 1.8 volts or be equal to 6.6 volts (due to when detecting to multiple programming circuit 12, va
Possible maximum is exactly vh, i.e. detection voltage vt) when, then this first voltage va is not in default voltage range.
Alternatively, described detection voltage control unit 22 including but not limited to has the dc-dc booster circuit of Enable Pin.Logical
Cross and detection voltage control unit 22 can be made to be sent according to main control unit 21 using the dc-dc booster circuit with Enable Pin
Control signal automatically turns on or closes, and the detection electricity after unlatching, according to needed for multiple programming circuit 12 is detected
The size of pressure vt, can be obtained by this dc-dc booster circuit.With regard to having the possibility of the dc-dc booster circuit of Enable Pin
Structure and concrete principle, be well known to those skilled in the art, will not be described here.
Alternatively, when the control signal of described main control unit 21 is high level, described detection voltage control unit 22
Open；When the control signal of described main control unit 21 is low level, described detection voltage control unit 22 is closed.Due to inspection
Survey voltage control unit 22 to be turned on and off according to the control signal that main control unit 21 sends, it is right as needed to therefore, it can
The Enable Pin of detection voltage control unit 22 is configured, and can be when the control signal of main control unit 21 is high level,
Detection voltage control unit 22 is opened, when the control signal of main control unit 21 is low level, detection voltage control unit 22
Close；Can also be that detection voltage control unit 22 is opened, and works as master control when the control signal of main control unit 21 is low level
When the control signal of unit 21 processed is high level, detection voltage control unit 22 is closed, thus realize main control unit 21 controlling
Detection voltage control unit 22 is automatically turned on or is closed, and is conducive to carrying out automatic detection to multiple programming circuit 12,
So that the efficiency high of detection, workable and low cost.
Alternatively, described window compares control unit 24 and can be made up of window comparator.Window compares control unit 24
For detecting first voltage va whether in default voltage range, wherein, detection method be by by first voltage va with
Default voltage range is compared (being to be compared in fact) with two boundary value vl and vh of default voltage range, if
Va is less than or equal to vl or va and is equal to vh, then first voltage va is not in default voltage range；If va is more than vl and is less than
Vh, then first voltage va is in default voltage range.Above-mentioned window compares control unit 24 to be carried out to first voltage automatically
The function of detection can be realized by window comparator, thus being conducive to carrying out automatic detection to multiple programming circuit 12, and
Make the efficiency high of detection, workable and low cost.
Alternatively, described state indication unit 25 includes but is not limited to LED lamp or buzzer.Due to being the when testing result
When one voltage va is not in default voltage range, it is faulty that surface repeatedly programs circuit 12, now, main control unit 21
Driving condition indicating member 25, makes state indication unit 25 open, and wherein, state indication unit can be LED lamp, buzzer
Deng, so testing staff can be pointed out repeatedly to program circuit 12 by acoustical signal or optical signal faulty, so that testing staff
Process in time and repeatedly program fault present in circuit 12.
The automatic detection that first embodiment of the invention proposes repeatedly programs the device of circuit, by detection voltage control unit
To multiple programming circuit output detection voltage, then compare the first electricity at control unit detection write voltage access point through window
Whether pressure exports to main control unit, if testing result exists for first voltage in default voltage range and by testing result
In default voltage range, then main control unit close detection voltage control unit opening repeatedly be programmed into voltage control single
To provide write voltage for multiple programming unit, otherwise, main control unit driving condition indicating member is to point out repeatedly to program for unit
Circuit is faulty, so not only multiple programming circuit can be detected before carrying out multiple programming process, be conducive to fast
The reason multiple programming process failure is looked in quick checking, but also the efficiency high of detection, workable and low cost can be made.
Show the second embodiment of the present invention in figs. 3 and 4.
Second embodiment of the invention provides a kind of method that automatic detection repeatedly programs circuit, real using the present invention first
The automatic detection applying example repeatedly programs the device of circuit to realize, and wherein, described multiple programming circuit is display device driving ic
In the multiple circuit between programming unit and write voltage access point.Fig. 3 is automatic detection according to a second embodiment of the present invention
The repeatedly flow chart of the method for programming circuit.Referring to Fig. 3, the method that described automatic detection repeatedly programs circuit includes:
Detection voltage control unit is opened and is exported from detection voltage control unit and is used for by step s31, main control unit
Detection repeatedly programs the detection voltage of circuit.
First, repeatedly program the device energising of circuit so as to locate to the automatic detection providing in first embodiment of the invention
In working condition.Then main control unit sends control signal to detection voltage control unit, so that detection voltage control unit is opened
Open, and export detection voltage from detection voltage control unit, for detecting multiple programming circuit.
It should be noted that detection voltage control unit output detection voltage, accessed by first resistor and write voltage
Point sends repeatedly programming circuit to, because multiple programming circuit is connected with multiple programming unit, so output detection voltage is to add
At the two ends of first resistor and multiple programming unit, first resistor and multiple programming unit carry out partial pressure to detection voltage, therefore,
It is achieved that to the multiple detection programming circuit by carrying out to the partial pressure on multiple programming unit detecting.
Alternatively, described detection control unit is opened by described main control unit, particularly as follows: when described main control unit to
During described detection voltage control unit output high level, described detection voltage control unit is opened.Because detection voltage controls list
Unit is to be automatically turned on according to the control signal that main control unit sends, and therefore, it can as needed to detection voltage control
The Enable Pin of unit is configured, and can be the detection voltage control unit when the control signal of main control unit is high level
Open or when the control signal of main control unit is low level, detection voltage control unit is opened, thus realizing leading
Control unit controls detection voltage control unit to be automatically turned on, and is conducive to multiple programming circuit is examined automatically
Survey, so that the efficiency high of detection, workable and low cost.
Alternatively, before main control unit is by the unlatching of detection voltage control unit, also include: described main control unit will
Repeatedly it is programmed into voltage control unit to close.It is to provide for multiple programming unit due to being repeatedly programmed into voltage control unit
Write voltage (process repeatedly being programmed), therefore, opens detection voltage control unit (i.e. to many in main control unit
Secondary programming circuit is detected) before, repeatedly it is programmed into voltage control unit and is closed, this is done to compiling to multiple
Before the process that Cheng Danyuan is repeatedly programmed, first multiple programming circuit is detected, when multiple programming circuit does not have fault
When, then carry out multiple programming process it is ensured that the efficiency of multiple programming process；If multiple programming process failure, can be clear and definite
It is not that the fault repeatedly programming circuit causes, such that it is able to the reason quick lookup multiple programming process failure.
Alternatively, the described voltage control unit that is repeatedly programmed into is closed by described main control unit, particularly as follows: when described
Main control unit to described be repeatedly programmed into voltage control unit output low level when, described be repeatedly programmed into voltage control
Unit is closed.It is automatically to be closed according to the control signal that main control unit sends due to being repeatedly programmed into voltage control unit
Close, therefore, it can as needed the Enable Pin being repeatedly programmed into voltage control unit is configured, can be to work as main control
When the control signal of unit is low level, repeatedly it is programmed into voltage control unit and closes, when the control signal of main control unit
During for high level, repeatedly it is programmed into voltage control unit and closes, be repeatedly programmed into electricity thus realizing main control unit and controlling
Pressure control unit is automatically switched off.
Step s32, window compare control unit detection write voltage access point at first voltage whether in default electricity
In the range of pressure, and testing result is exported to main control unit.
If testing result be first voltage in default voltage range, execution step s33, otherwise, execution step
s35.
It should be noted that whether the first voltage that window compares at control unit detection write voltage access point is being preset
Voltage range in detection method be first voltage to be compared with default voltage range thus judging that first voltage is
No in default voltage range.If first voltage is in default voltage range, window compares control unit to master control
Unit processed output high level with represent testing result for first voltage in default voltage range, otherwise, window compares control
Unit to main control unit output low level with represent testing result for first voltage not in default voltage range.
Specifically, default voltage range can be more than vl and to be less than vh, and wherein, vl is that described display device drives
The i/o port working voltage of ic10, vh is described detection voltage.With regard to the detailed description part of default voltage range, with
One embodiment partly identical, will not be described here.
Specifically, after detection voltage control unit output detection voltage, passed by first resistor and write voltage access point
Give multiple programming circuit, because multiple programming circuit is connected with multiple programming unit, so exporting detection voltage is to be added in the
One resistance and the two ends of multiple programming unit, first resistor and multiple programming unit carry out partial pressure to detection voltage, and in write
First voltage at voltage access point is exactly partial pressure on multiple programming unit for the detection voltage, therefore, by first voltage
Carry out detecting the detection being achieved that the state to multiple programming circuit.
The detection to first voltage for the control unit is compared by window, it is possible to achieve multiple programming circuit is examined automatically
Survey, so that the efficiency high of detection, workable and low cost.
Detection voltage control unit is closed by step s33, main control unit.
If testing result executes this step for first voltage in default voltage range, that is, main control unit will
Detection voltage control unit is closed.
Alternatively, described detection control unit is closed by described main control unit, particularly as follows: when described main control unit to
During described detection voltage control unit output low level, described detection voltage control unit is closed.Because detection voltage controls list
Unit is to be automatically switched off according to the control signal that main control unit sends, and therefore, it can as needed to detection voltage control
The Enable Pin of unit is configured, and when the control signal of main control unit is low level, detection voltage control unit is closed,
Can be that detection voltage control unit is closed, thus realizing main control list when the control signal of main control unit is high level
Unit controls detection voltage control unit to be automatically switched off, and is conducive to carrying out automatic detection to multiple programming circuit, thus
Make the efficiency high of detection, workable and low cost.
Step s34, main control unit are repeatedly programmed into voltage control unit and are opened and from being repeatedly programmed into voltage
Control unit exports the write voltage of multiple programming unit.
When testing result for first voltage in default voltage range when, show that repeatedly programming circuit does not have fault, main
Detection voltage control unit is closed by control unit, terminates to the multiple detection programming circuit, then main control unit control is many
The secondary voltage control unit that is programmed into is opened, and provides write voltage for multiple programming unit, carries out multiple programming process.So may be used
To realize, before carrying out multiple programming process to multiple programming unit, first carrying out to the multiple detection programming circuit, when multiple
Programming circuit is not when having fault, then carries out multiple programming process it is ensured that the efficiency of multiple programming process；If repeatedly programmed
Journey failure, can clear and definite not be that the fault of repeatedly programming circuit causes, and searches multiple programming process failure such that it is able to quick
The reason.
Alternatively, the described voltage control unit that is repeatedly programmed into is opened by described main control unit, particularly as follows: when described
Main control unit to described be repeatedly programmed into voltage control unit output high level when, described be repeatedly programmed into voltage control
Unit is opened.It is automatically to be opened according to the control signal that main control unit sends due to being repeatedly programmed into voltage control unit
Open, therefore, it can as needed the Enable Pin being repeatedly programmed into voltage control unit is configured, can be to work as main control
When the control signal of unit is high level, repeatedly it is programmed into voltage control unit and opens or when main control unit
When control signal is low level, repeatedly it is programmed into voltage control unit and opens, repeatedly compile thus realizing main control unit and controlling
Journey write voltage control unit is automatically turned on.
Step s35, main control unit driving condition indicating member are faulty to point out repeatedly to program circuit.
If testing result executes this step, i.e. main control unit for first voltage not in default voltage range
Driving condition indicating member is faulty to point out repeatedly to program circuit.Wherein, state indication unit employing can send sound
Message number or the device of optical signal, such as LED lamp or buzzer etc., faulty to point out testing staff repeatedly to program circuit,
So that testing staff is processed in time and repeatedly program fault present in circuit.
With reference to the working timing figure that automatic detection repeatedly programs each unit in the device of circuit, the present embodiment is done
Further illustrate.Fig. 4 is the working timing figure of each unit according to a second embodiment of the present invention.Referring to Fig. 4, vp represents to certainly
Dynamic detection repeatedly programs the running voltage that the device of circuit provides；Vt_en represents main control unit and exports to detection voltage control
The control signal voltage of unit；Vt represents the detection voltage of detection voltage control unit output；Ve represents window and compares control list
Unit exports to the testing result signal voltage of main control unit；Vm_en represents main control unit and exports to being repeatedly programmed into electricity
The control signal voltage of pressure control unit；Vm is programmed into voltage control unit for many times and exports to the write electricity of multiple programming unit
Pressure；Va represents the first voltage at write voltage access point.
Referring to Fig. 4, after the device repeatedly programming circuit to automatic detection provides running voltage vp, main control unit is to inspection
Survey the control signal voltage vt_en that voltage control unit exports high level, detection voltage control unit is opened and to multiple simultaneously
Programming circuit output detection voltage vt；After detection voltage control unit output detection voltage vt, window compares control unit to writing
Enter first voltage va at voltage access point to be detected, when testing result for first voltage in default voltage range when,
Export high level to main control unit, that is, first voltage va now is partial pressure on multiple programming unit for detection voltage vt
(or be va=vt × r2/ (r1+r2), referring to first embodiment), the high level of vt_en is become low level by main control unit,
Detection voltage control unit is closed；Then, main control unit exports high level to being repeatedly programmed into voltage control unit
Control signal voltage vm_en, is repeatedly programmed into voltage control unit simultaneously and opens and to multiple programming unit output write electricity
Until multiple programming process terminates, first voltage va of this process is vm to pressure vm.
The method that the automatic detection that second embodiment of the invention proposes repeatedly programs circuit, by detection voltage control unit
To multiple programming circuit output detection voltage, then compare the first electricity at control unit detection write voltage access point through window
Whether pressure exports to main control unit, if testing result exists for first voltage in default voltage range and by testing result
In default voltage range, then main control unit close detection voltage control unit opening repeatedly be programmed into voltage control single
To provide write voltage for multiple programming unit, otherwise, main control unit driving condition indicating member is to point out repeatedly to program for unit
Circuit is faulty, so not only multiple programming circuit can be detected before carrying out multiple programming process, be conducive to fast
The reason multiple programming process failure is looked in quick checking, but also the efficiency high of detection, workable and low cost can be made.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious changes,
Readjust and substitute without departing from protection scope of the present invention.Therefore although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other Equivalent embodiments more can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (13)
1. a kind of automatic detection repeatedly programs the device of circuit, and described multiple programming circuit drives in ic for display device repeatedly to be compiled
Circuit between Cheng Danyuan and write voltage access point, described device includes:
Main control unit, detection voltage control unit, first resistor, window compare control unit and state indication unit, wherein,
Described detection voltage control unit and state indication unit opened according to the control signal that described main control unit sends or
Close；
Described detection voltage control unit exports detection voltage, sends institute to by described first resistor and write voltage access point
State multiple programming circuit；
Described window compare control unit detect said write voltage access point at first voltage whether in default voltage model
In enclosing, and testing result is exported to described main control unit；
Described state indication unit when described testing result be described first voltage not in described default voltage range when carry
Show that described multiple programming circuit is faulty.
2. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that described device also includes
Repeatedly it is programmed into voltage control unit, wherein, the described voltage control unit that is repeatedly programmed into is according to described main control unit
The control signal sending is turned on and off and when described testing result is described first voltage in described default voltage range
Write voltage is provided for described multiple programming unit when interior.
3. automatic detection according to claim 2 repeatedly programs the device of circuit it is characterised in that described multiple programming is write
Enter the dc-dc booster circuit that voltage control unit includes having Enable Pin.
4. automatic detection according to claim 2 repeatedly programs the device of circuit it is characterised in that working as described main control list
When the control signal of unit is high level, the described voltage control unit that is repeatedly programmed into is opened；
When the control signal of described main control unit is low level, the described voltage control unit that is repeatedly programmed into is closed.
5. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that described default voltage
Scope is more than vl and to be less than vh, and wherein, vl is the i/o port working voltage that described display device drives ic, and vh is described inspection
Survey voltage.
6. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that described detection voltage control
Unit processed includes the dc-dc booster circuit with Enable Pin.
7. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that working as described main control list
When the control signal of unit is high level, described detection voltage control unit is opened；
When the control signal of described main control unit is low level, described detection voltage control unit is closed.
8. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that described window compares control
Unit processed is made up of window comparator.
9. automatic detection according to claim 1 repeatedly programs the device of circuit it is characterised in that described state instruction list
Unit includes LED lamp or buzzer.
10. a kind of automatic detection is realized using the device that automatic detection as claimed in claim 1 repeatedly programs circuit repeatedly compile
The method of journey circuit, described multiple programming circuit be display device drive in ic repeatedly programming unit with write voltage access point it
Between circuit, methods described includes:
Main control unit detection voltage control unit is opened and export from described detection voltage control unit be used for detecting described
Repeatedly program the detection voltage of circuit；
Window compare control unit detect said write voltage access point at first voltage whether in default voltage range,
And export testing result to described main control unit；
If described testing result be described first voltage in described default voltage range, described main control unit is by institute
State detection voltage control unit to close；
If for described first voltage not in described default voltage range, described main control unit drives described testing result
Dynamic state indication unit is to point out described multiple programming circuit faulty.
11. automatic detections according to claim 10 repeatedly program the method for circuit it is characterised in that in main control unit
Before detection voltage control unit is opened, also include:
Described main control unit is repeatedly programmed into voltage control unit and is closed；
After described detection voltage control unit is closed by described main control unit, also include:
The described voltage control unit that is repeatedly programmed into is opened and is repeatedly programmed into voltage from described by described main control unit
Control unit exports the write voltage of described multiple programming unit.
12. automatic detections according to claim 11 repeatedly program the method for circuit it is characterised in that described main control list
The described voltage control unit that is repeatedly programmed into is turned on and off by unit, particularly as follows:
When described main control unit to described be repeatedly programmed into voltage control unit output high level when, described multiple programming is write
Enter voltage control unit to open；
When described main control unit to described be repeatedly programmed into voltage control unit output low level when, described multiple programming is write
Enter voltage control unit to close.
13. automatic detections according to claim 10 repeatedly program the method for circuit it is characterised in that described main control list
Described detection control unit is turned on and off by unit, particularly as follows:
When described main control unit is to described detection voltage control unit output high level, described detection voltage control unit is opened
Open；
When described main control unit is to described detection voltage control unit output low level, described detection voltage control unit is closed
Close.
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| CN1395687A (en) * | 2000-11-17 | 2003-02-05 | Oht株式会社 | Inspecting apparatus and inspecting method for circuit board |
| JP2002372569A (en) * | 2001-06-14 | 2002-12-26 | Ando Electric Co Ltd | Voltage monitoring circuit and ic testing device with voltage monitoring circuit built therein |
| CN101542304A (en) * | 2006-11-16 | 2009-09-23 | 爱德万测试株式会社 | Measuring circuit and test device |
| JP2008157643A (en) * | 2006-12-21 | 2008-07-10 | Yokogawa Electric Corp | Semiconductor testing apparatus |
| JP2009075046A (en) * | 2007-09-25 | 2009-04-09 | Yokogawa Electric Corp | Apparatus for testing semiconductor device |
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