CN209149784U - A kind of backlight drive circuit efficiency test device - Google Patents
A kind of backlight drive circuit efficiency test device Download PDFInfo
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- CN209149784U CN209149784U CN201822236539.3U CN201822236539U CN209149784U CN 209149784 U CN209149784 U CN 209149784U CN 201822236539 U CN201822236539 U CN 201822236539U CN 209149784 U CN209149784 U CN 209149784U
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Abstract
The utility model embodiment discloses a kind of backlight drive circuit efficiency test device, backlight drive circuit efficiency test device includes control unit, parameter setting component, control voltage source, voltage sensing component and current sense component, and control unit is exported according to from the received setting step value adjusting control voltage source of parameter setting component to the power supply signal of the first node of backlight drive circuit；Voltage sensing component detection backlight drive circuit first node to third node current potential and be transmitted to control unit；The detection of current sense component flows through the electric current of first node and second node and is transmitted to control unit；Control unit obtains backlight drive circuit efficiency according to the current potential of first node to third node, the electric current for flowing through first node and second node.By the technical solution of the utility model, the automatic detection of backlight drive circuit efficiency is realized, the test process of backlight drive circuit efficiency is simplified, improves testing efficiency.
Description
Technical field
The utility model embodiment is related to field of display technology more particularly to a kind of backlight drive circuit efficiency test dress
It sets.
Background technique
Liquid crystal display panel is backlight display panel, and the backlight in liquid crystal display panel needs backlight drive circuit to carry out
Driving is to adjust the light emission luminance of the lighting time of backlight and backlight in liquid crystal display panel, backlight drive circuit efficiency
Height to the specification assessment of backlight consumption power, temperature rise and backlight driving chip type selecting etc. caused by own power consumes it is equal
There are influences, for example, in addition to backlight normal consumption, complementary energy is consumed in the form of heat in power supply electric power
On backlight drive circuit, in the case where backlight drive circuit efficiency is relatively low, the power consumption meeting on backlight drive circuit is consumed
Increase therewith, backlight drive circuit peripheral temperature also increases.Therefore, the efficiency of backlight drive circuit is tested and very must
It wants.
The current common efficiency to backlight drive circuit, which is tested, to carry out manual test using ammeter by personnel,
By filling different input voltages outside power supply unit, personnel test backlight drive circuit efficiency and at least need three pieces of ammeters, summarize
After the multiple groups test data of muti-piece ammeter, the backlight drive circuit efficiency under the conditions of different input voltages is calculated.But the method needs
Tester carries out the work such as data test and data record manually, and the test process to backlight drive circuit efficiency is caused to be deposited
Test process it is cumbersome, occupy ammeter quantity and test process time-consuming the problems such as.
Utility model content
The utility model embodiment provides a kind of backlight drive circuit efficiency test device, to solve backlight drive circuit effect
The test process of rate is cumbersome, the more and test process that occupies ammeter quantity the problem of time-consuming.
The utility model embodiment provides a kind of backlight drive circuit efficiency test device, comprising:
Control unit, parameter setting component, control voltage source, voltage sensing component and current sense component, the parameter
Set parts, the control voltage source, the voltage sensing component and the current sense component with the control unit
Electrical connection；
The control unit adjusts the control voltage source according to from the received setting step value of the parameter setting component
It exports to the power supply signal of the first node of the backlight drive circuit；
The voltage sensing component detect the current potential of the first node of the backlight drive circuit, second node current potential with
And third node current potential and be transmitted to the control unit；The current sense component detection flows through the electricity of the first node
It flows and flows through the electric current of the second node and be transmitted to the control unit；
The control unit is according to the current potential of the first node, the current potential of the second node, the third node
Current potential, the electric current for flowing through the first node and the electric current for flowing through the second node obtain the backlight drive circuit effect
Rate；
Wherein, the first node is the power supply signal input node of the backlight drive circuit, and the second node is
The backlight drive signal output node of the backlight drive circuit, the third node are that the backlight of the backlight drive circuit is anti-
Feedback signal input node.
Further, the backlight drive circuit and the backlight drive circuit efficiency test device be altogether.
Further, the control unit and the control voltage source, the voltage sensing component and the electric current sense
It surveys between component and carries out I2C communication.
Further, the backlight drive circuit efficiency test device, further includes:
Interface unit, the interface unit are electrically connected with the control unit, and the control unit passes through the interface portion
Part is communicated with host.
Further, the control unit transmits the electricity of the first node by the interface unit to the host
Position, the current potential of the second node, the third node current potential, flow through the first node electric current, flow through described second
The electric current of node and the backlight drive circuit efficiency.
Further, the backlight drive circuit efficiency test device, further includes:
Display unit, the display unit are electrically connected with the control unit, and the display unit shows setting state letter
Breath.
Further, the setting status information include test mode information, the interface unit communications parameter information with
And configuration parameter information.
Further, the backlight drive circuit efficiency test device, further includes:
Power supply part, the power supply part respectively with the control unit, the control voltage source, the voltage sensing portion
Part, the current sense component, the display unit and interface unit electrical connection.
Further, the voltage sensing component includes integrated voltage sensor, and the current sense component includes integrated
Current sensor.
Further, the parameter setting component is key-press input component or touch screen input part.
The utility model embodiment provides a kind of backlight drive circuit efficiency test device, and backlight drive circuit efficiency is surveyed
Trial assembly set in the parameter setting component, the control voltage source, the voltage sensing component and the current sense portion
Part is electrically connected with the control unit, and the control unit is according to from the received setting step value tune of the parameter setting component
Save the power supply signal that the control voltage source exports the first node to the backlight drive circuit, the voltage sensing component inspection
Survey the current potential of the first node of the backlight drive circuit, the current potential of second node and third node current potential and be transmitted to institute
Control unit is stated, the current sense component detection flows through the electric current of the first node and flows through the electricity of the second node
Flow and be transmitted to the control unit, the control unit according to the current potential of the first node, the second node current potential,
The current potential of the third node flows through the electric current of the first node and flows through the electric current acquisition back of the second node
Light drive circuit efficiency realizes the automatic detection of backlight drive circuit efficiency, avoids manual test backlight drive circuit effect
Test process caused by rate is cumbersome, the more and test process that occupies ammeter quantity the problem of time-consuming, simplifies backlight drive electricity
The test process of road efficiency improves the testing efficiency of backlight drive circuit efficiency.
Detailed description of the invention
Fig. 1 is a kind of structural representation for backlight drive circuit efficiency test device that the utility model embodiment one provides
Figure；
Fig. 2 is a kind of Efficiency testing side for backlight drive circuit efficiency test device that the utility model embodiment one provides
The flow diagram of method；
Fig. 3 is the corresponding data wave of a kind of backlight drive circuit efficiency test device that the utility model embodiment one provides
Shape figure；
Fig. 4 is a kind of structural representation for backlight drive circuit efficiency test device that the utility model embodiment two provides
Figure；
Fig. 5 is that a kind of pair of backlight drive circuit efficiency that the utility model embodiment two provides carries out automatic test and carries out
The effect contrast figure of manual test.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant to the utility model is illustrated only for ease of description, in attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of structural representation for backlight drive circuit efficiency test device that the utility model embodiment one provides
Figure.Referring to Fig. 1, backlight drive circuit efficiency test device includes control unit 1, parameter setting component 2, control voltage source 3, electricity
Press sensing part 4 and current sense component 5, the parameter setting component 2, the control voltage source 3, the voltage sensing component
4 and the current sense component 5 be electrically connected with the control unit 1.
The control unit 1 adjusts the control voltage according to from the received setting step value of the parameter setting component 2
Source 3 is exported to the power supply signal of the first node 61 of the backlight drive circuit 6, and the voltage sensing component 4 detects the back
The current potential of the first node 61 of light drive circuit 6, the current potential of second node 62 and third node 63 current potential and be transmitted to institute
Control unit 1 is stated, the current sense component 5 detects the electric current for flowing through the first node 61 and flows through the second node
62 electric current is simultaneously transmitted to the control unit 1, and the control unit 1 is according to the current potential of the first node 61, described second
The current potential of node 62, the third node 63 current potential, flow through the electric current of the first node 61 and flow through second section
The electric current of point 62 obtains the efficiency of the backlight drive circuit 6.The first node 61 is the power supply of the backlight drive circuit 6
Signal input node, the second node 62 are the backlight drive signal output node of the backlight drive circuit 6, the third
Node 63 is the backlight feedback signal input node of the backlight drive circuit 6.
Referring to Fig. 1, for driving backlight circuit unit 7, backlight circuit unit 7 can be set includes backlight drive circuit 6
Multiple LED series arms, illustratively setting backlight circuit unit 7 includes 8 LED series arms, backlight drive circuit 6 here
Each LED branch in backlight circuit unit 7 is controlled respectively, it is real by the control to LED illuminating state in backlight circuit unit 7
The adjusting of the display parameters of picture is now shown to liquid crystal display panel.
The chip as shown in Figure 1 of backlight drive circuit 6 and its peripheral circuit are constituted, the V of chipINIt is responsible for supply electricity in port
Power, common voltage range are 5V-21V.The port EN of chip is enable port, when the port EN access low level can be set,
Backlight drive circuit 6 stops working, and when high level is accessed in the port EN, backlight drive circuit 6 works, such as when the ground connection of the port EN,
Backlight drive circuit 6 stops working, and when the level value of the port EN access signal is 3.3V, backlight drive circuit 6 works.Chip
Dim signal is accessed in the port PWMIN, and the corresponding frequency of dim signal is 200Hz-10kHz, and dim signal can be duty ratio and be
The rectangular wave of 1%-100%.The port SW1 and the port SW2 of chip are that oscillation adjusts pin.The port OVP of chip is over-voltage
Pin is protected, can be set when the level value of the port OVP access signal is more than 2V, chip starts overvoltage protection, the SW1 of chip
The corresponding signal in port and the port SW2 stops oscillation.The port IFB of chip is feedback regulation pin, for each LED branch
Road is individually adjusted, and each port IFB of chip connects LED light string all the way, convenient to be individually adjusted, wherein a paths of LEDs branch
Road is deposited when abnormal, and chip can be reached by the adjusting of IFB port signal removes backlight circuit unit for abnormal LED branch
Effect is avoided in the presence of the abnormal other LED branches of LED branches affect.
Illustratively, the V of chipIN12V voltage is supplied in port, and the port EN of chip and PWM port supply 3.3V electricity
Pressure, the port SW1 chip interior corresponding with the port SW2 include the electric power metal-oxide-semiconductor being connected to the ground, the port SW1 and the port pair SW2
The signal answered starts starting of oscillation, under the cooperation for the booster circuit that inductance L1 and switching tube D1 is formed, the corresponding signal in the port VOUT
Predetermined normal level is boosted to, such as single white light LEDs, forward voltage range is 2.8V-3.1V, for single string 10
LED, forward voltage range are 28.5V, and at this time when the port PWMIN supply dim signal, IFB is synchronous for each LED branch
Dynamic regulation is carried out, such as the level value of the corresponding dim signal in the port PWMIN is low level, such as when 0V, the port IFB is corresponding
The level value of signal is high level, such as when the corresponding signal in the port 5V, IFB is high level, the corresponding port IFB setting
LED in LED branch extinguishes；The level value of the corresponding dim signal in the port PWMIN is high level, such as when 3.3V, the port IFB
Corresponding signal is low level, and for example, 0.6V corresponds to lighting in the LED branch of the port IFB setting.
Referring to Fig. 1, the node between the input side VIN of backlight drive circuit 6 and the Vin pin of chip is as first node
61, the node conduct that the anode of the backlight string structure of the outlet side VOUT and backlight circuit unit 7 of backlight drive circuit 6 is connect
The cathode of second node 62, the backlight string structure of the IFB pin and backlight circuit unit 7 of 6 chip of backlight drive circuit is connect
Node as third node 63.
The current value I of first node 611With voltage value V1Current value and voltage value respectively in the path input side VIN,
The current value I of second node 622With voltage value V2Current value and voltage value respectively in the path outlet side VOUT, third section
The voltage value V of point 633For the voltage value in the path IFB.Pass through the voltage value and electricity of above-mentioned first node 61 and second node 62
The voltage value of flow valuve and third node 63 can calculate the input power and output power for obtaining backlight drive circuit 6,
And then the efficiency EFF of backlight drive circuit 6 is obtained, referring specifically to following formula:
Optionally, parameter setting component 2 can be press key input section part or touch screen input part, to backlight drive circuit
6 efficiency is tested, and needs to input different power supply signals to backlight drive circuit 6, i.e. first node 61 need to access difference
Power supply signal, for the first time test can set input backlight drive circuit 6 power supply signal have an original levels value, Yong Huke
To pass through the step value of 2 input power signal level value of parameter setting component, follow-up test inputs the power supply of backlight drive circuit 6
Signal is continuously increased according to the step value, is realized to the test under different electrical power signal to 6 efficiency of backlight drive circuit, the present invention
Embodiment is not construed as limiting the corresponding specific hardware structure of parameter setting component 2.
Specifically, in the backlight drive circuit efficiency test device course of work, parameter setting component 2 receives parameter setting step
The parameter setting step value received is transferred to control unit 1 by long value, parameter setting component 2, and control unit 1 is opened from initial value
Begin, to set step value as step-length, the output voltage of continuous refresh control voltage source 3, voltage range traverses 5V-21V.Control electricity
1., via 61 out-put supply signal of first node to backlight drive circuit 6, voltage sensing component 4 passes through road to 3 passage path of potential source
Diameter 2., path 4. with path 5. respectively sense first node 61 current potential, the current potential of second node 62 and the electricity of third node 63
Position, while 3. 6. sensing flows through the electric current of first node 61 and flows through second 5 passage path of current sense component respectively with path
The electric current of node 62.In the present embodiment, control voltage source 3 is that DC converting controls voltage source, and direct-current control voltage source receives to come
DC voltage is exported from the setting step value of control unit 1.
Optionally, voltage sensing component 4 may include integrated voltage sensor, and current sense component 5 may include integrating
Illustratively the integrated voltmeter and integrated ammeter of the models such as INA219 or INA226 can be used in current sensor, control
The feedback information of component 1 collection voltages sensing part 4 and current sense component 5 calculates the output voltage of different control voltage sources 3
The efficiency of corresponding backlight drive circuit 6.
On the basis of the above embodiments, Fig. 2 is a kind of backlight drive circuit effect that the utility model embodiment one provides
The flow diagram of the Efficiency testing method of rate test device.Backlight drive circuit efficiency test device combined with Figure 1 and Figure 2,
Efficiency testing method includes:
The current value I of first node 611With voltage value V1Current value and voltage value respectively in the path input side VIN,
The current value I of second node 622With voltage value V2Current value and voltage value respectively in the path outlet side VOUT, third section
The voltage value V of point 633For the voltage value in the path IFB.Pass through the voltage value and electricity of above-mentioned first node 61 and second node 62
The voltage value of flow valuve and third node 63 can calculate the input power and output power for obtaining backlight drive circuit 6,
And then obtain the efficiency EFF of backlight drive circuit
S101, beginning.
The step value MIN_STEP of S102, the power supply signal exported through parameter setting component settings control voltage source.
Illustratively, it is 0.1V, 0.2V, 1V or other that MIN_STEP, which can be set,.
The original levels value that S103, control unit control the power supply signal of the control voltage source output is 5.0V.
S104, V is acquired by voltage sensing component1、V2And V3, I is acquired by current sense component 51And I2。
Referring to Fig. 1, the current value I of first node 611With voltage value V1Current value respectively in the path input side VIN
And voltage value, V1Initially it is equal to V0, the current value I of second node 622With voltage value V2Respectively in the path outlet side VOUT
Current value and voltage value, the voltage value V of third node 633For the voltage value in the path IFB.
S105, input power, output power and efficiency are calculated, and the data being calculated is exported to host.
S106, control V1Increment, V1=V1+MIN_STEP。
S107, judge V1Whether 21V is greater than.
If V1Less than or equal to 21V, S104-S107 is repeated；If V1Greater than 21V, S108 is executed.
S108, test terminate.
It is alternatively possible to which control unit 1 and control voltage source 3, voltage sensing component 4 and current sense component 5 is arranged
Between carry out I2C communication.Fig. 3 is that a kind of backlight drive circuit efficiency test device that the utility model embodiment one provides is corresponding
Data waveform figure.In conjunction with Fig. 1 and Fig. 3, control unit 1 controls the power supply signal for controlling the output of voltage source 3 with 1V as step
It is long, increase to 21V, the level value of voltage sensing component 4 and the corresponding each power supply signal of current sense component 5, acquisition pair from 5V
The level value and electric current answered.Between control unit 1 and control voltage source 3, voltage sensing component 4 and current sense component 5
Carry out I2C communication, CLK is clock signal, and DATA is data-signal, and voltage sensing component 4 and current sense component 5 are collected
The current potential of first node 61, the current potential of second node 62, third node 63 current potential, flow through the electric current of first node 61 and flow through
The current data of second node 62 is contained in DATA data waveform.
It is alternatively possible to which backlight drive circuit 6 and backlight drive circuit efficiency test device is arranged altogether.Specifically, it carries on the back
Light drive circuit 6 and backlight drive circuit efficiency test device be altogether by the ground terminal of backlight drive efficiency test device and to
The ground terminal for surveying backlight drive circuit 6 connects together, the letter inputted by reference to the ground terminal of backlight drive circuit 6 to be measured
Number, be conducive to improve the accurate of voltage sensing component voltage parameter collected and current sense component current parameters collected
Property.
Backlight drive efficiency test device provided by the utility model, it is described in backlight drive circuit efficiency test device
Parameter setting component, the control voltage source, the voltage sensing component and the current sense component with the control
Component electrical connection, the control unit adjust the control voltage from according to the received setting step value of the parameter setting component
Source exports the power supply signal of the first node to the backlight drive circuit, and the voltage sensing component detects the backlight drive
The current potential of the first node of circuit, the current potential of second node and third node current potential and be transmitted to the control unit, institute
The detection of current sense component is stated to flow through the electric current of the first node and flow through the electric current of the second node and be transmitted to institute
Control unit is stated, the control unit is according to the current potential of the first node, the current potential of the second node, the third node
Current potential, flow through the electric current of the first node and flow through the electric current of the second node and obtain backlight drive circuit effect
Rate realizes the automatic detection of backlight drive circuit efficiency, avoids test caused by manual test backlight drive circuit efficiency
Process is cumbersome, the more and test process that occupies ammeter quantity the problem of time-consuming, simplifies the test of backlight drive circuit efficiency
Process improves the testing efficiency of backlight drive circuit efficiency.
Embodiment two
Fig. 4 is a kind of structural representation for backlight drive circuit efficiency test device that the utility model embodiment two provides
Figure.On the basis of the backlight drive circuit efficiency test device of structure shown in Fig. 1, the backlight drive circuit of structure shown in Fig. 4
Efficiency test device can also include interface unit 8, and interface unit 8 is electrically connected with control unit 1, and control unit 1 passes through interface
Component 8 is communicated with host 11.Illustratively, in conjunction with Fig. 1 and Fig. 4, control unit 1 can be by interface unit 8 to host
The 11 transmission current potentials of first node 61, the current potential of second node 62, third node 63 current potential, flow through the electricity of first node 61
Flow, flow through the electric current of second node 2 and the efficiency of backlight drive circuit 6.
Fig. 5 is that a kind of pair of backlight drive circuit efficiency that the utility model embodiment two provides carries out automatic test and carries out
The effect contrast figure of manual test.In conjunction with Fig. 4 and Fig. 5, believe for the power supply for the varying level value that backlight drive circuit 6 receives
Number, host 11 receives the efficiency value of multiple backlight drive circuits 6, and analysis generates curve b shown in fig. 5, and curve a is directed to backlight
The corresponding efficiency manual test result of the power supply signal for the varying level value that driving circuit 6 receives.Correlation curve a and curve b,
During the power supply signal Vin for inputting backlight drive circuit 6 is traversed by 5V to 21V, backlight drive circuit efficiency test dress
Opposite personnel are set to survey the deviation of backlight drive efficiency manually that deviation is slightly larger in 1% or so, 5V is inclined when being 1.1%, 6V-21V
Difference is almost the same less than the efficiency curve that 1%, two kind of measurement method measures, and the test of backlight drive circuit efficiency test device
Data consistency is more preferable, backlight drive circuit efficiency test device testing efficiency deviation within the scope of acceptable deviation, have compared with
Good testing reliability.
Optionally, in conjunction with Fig. 1 and Fig. 4, backlight drive circuit efficiency test device can also include display unit 9, display
Component 9 is electrically connected with control unit 1, and the display setting status information of display unit 9, setting status information may include test mode
Information, interface unit communications parameter information and configuration parameter information.Specifically, test mode information representation is to backlight drive electricity
Road efficiency tests whether carrying out, and interface unit communications parameter information is that usb data mouth and 11 messaging parameter of host are arranged
Information, such as it is that 8bit/ no parity check/stop is that display interface component communication parameter information, which is baud rate 115200bps/ data,
1bit, configuration parameter information include the step value for inputting the power supply signal of backlight drive circuit 6.The display setting shape of display unit 9
State information is convenient for the clear test device working condition of operator, can be according to actual state option and installment information, and according to logical
Parameter information setting 11 messaging parameter of host etc. is believed, to enhance the ease for use of test device.
Optionally, in conjunction with Fig. 1 and Fig. 4, backlight drive circuit efficiency test device can also include power supply part 10, power supply
Component 10 respectively with control unit 1, control voltage source 3, voltage sensing component 4, current sense component 5, display unit 9 and connect
Mouthpiece 8 is electrically connected, and power supply part is respectively to control unit 1, control voltage source 3, voltage sensing component 4, current sense component
5, display unit 9 and interface unit 8 are powered, and Fig. 4 is illustratively arranged power supply part 10 and passes through control unit 1 to display unit
9 power supplies, also can be set power supply part 10 and are electrically connected with display unit 9, and power supply part 10 is directly powered to display unit 9.
The utility model embodiment two further includes interface unit by setting backlight drive circuit efficiency test device, described
Interface unit is electrically connected with the control unit, and the control unit is communicated by the interface unit with host, is convenient for
Host generates backlight drive circuit efficiency curve and carries out subsequent analysis.It further includes showing that backlight drive circuit efficiency test device, which is arranged,
Show that component, display unit are electrically connected with control unit, display unit display setting status information, setting status information may include
Test mode information, interface unit communications parameter information and configuration parameter information, enhance the ease for use of test device.
Note that above are only the preferred embodiment and institute's application technology principle of the utility model.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, is able to carry out for a person skilled in the art various bright
Aobvious variation, readjustment and substitution is without departing from the protection scope of the utility model.Therefore, although passing through above embodiments
The utility model is described in further detail, but the utility model is not limited only to above embodiments, is not departing from
It can also include more other equivalent embodiments in the case that the utility model is conceived, and the scope of the utility model is by appended
Scope of the claims determine.
Claims (10)
1. a kind of backlight drive circuit efficiency test device characterized by comprising
Control unit, parameter setting component, control voltage source, voltage sensing component and current sense component, the parameter setting
Component, the control voltage source, the voltage sensing component and the current sense component are electrically connected with the control unit
It connects；
The control unit adjusts the control voltage source output according to from the received setting step value of the parameter setting component
To the power supply signal of the first node of the backlight drive circuit；
The voltage sensing component detects the current potential of the first node of the backlight drive circuit, the current potential of second node and
The current potential of three nodes is simultaneously transmitted to the control unit；Current sense component detection flow through the electric current of the first node with
And it flows through the electric current of the second node and is transmitted to the control unit；
The control unit according to the current potential of the first node, the current potential of the second node, the third node current potential,
It flows through the electric current of the first node and flows through the electric current acquisition backlight drive circuit efficiency of the second node；
Wherein, the first node is the power supply signal input node of the backlight drive circuit, and the second node is described
The backlight drive signal output node of backlight drive circuit, the third node are the backlight feedback letter of the backlight drive circuit
Number input node.
2. backlight drive circuit efficiency test device according to claim 1, which is characterized in that the backlight drive circuit
Altogether with the backlight drive circuit efficiency test device.
3. backlight drive circuit efficiency test device according to claim 1, which is characterized in that the control unit and institute
It states and carries out I between control voltage source, the voltage sensing component and the current sense component2C communication.
4. backlight drive circuit efficiency test device according to claim 1, which is characterized in that further include:
Interface unit, the interface unit are electrically connected with the control unit, the control unit by the interface unit with
Host is communicated.
5. backlight drive circuit efficiency test device according to claim 4, which is characterized in that the control unit passes through
The interface unit transmits the current potential of the first node, the current potential of the second node, the third node to the host
Current potential, flow through the first node electric current, flow through the second node electric current and the backlight drive circuit efficiency.
6. backlight drive circuit efficiency test device according to claim 4, which is characterized in that further include:
Display unit, the display unit are electrically connected with the control unit, the display unit display setting status information.
7. backlight drive circuit efficiency test device according to claim 6, which is characterized in that the setting status information
Including test mode information, the interface unit communications parameter information and configuration parameter information.
8. backlight drive circuit efficiency test device according to claim 6, which is characterized in that further include:
Power supply part, the power supply part respectively with the control unit, the control voltage source, the voltage sensing component,
The current sense component, the display unit and interface unit electrical connection.
9. backlight drive circuit efficiency test device according to claim 1, which is characterized in that the voltage sensing component
Including integrating voltage sensor, the current sense component includes integrated current sensors.
10. backlight drive circuit efficiency test device according to claim 1, which is characterized in that the parameter setting portion
Part is key-press input component or touch screen input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822236539.3U CN209149784U (en) | 2018-12-28 | 2018-12-28 | A kind of backlight drive circuit efficiency test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822236539.3U CN209149784U (en) | 2018-12-28 | 2018-12-28 | A kind of backlight drive circuit efficiency test device |
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| CN209149784U true CN209149784U (en) | 2019-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980502A (en) * | 2023-03-20 | 2023-04-18 | 宁波群芯微电子股份有限公司 | Optocoupler driving capability test method and system |
-
2018
- 2018-12-28 CN CN201822236539.3U patent/CN209149784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115980502A (en) * | 2023-03-20 | 2023-04-18 | 宁波群芯微电子股份有限公司 | Optocoupler driving capability test method and system |
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Address after: 215301 No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301 No. 1, Longteng Road, Kunshan Development Zone, Jiangsu, Suzhou Patentee before: Kunshan Longteng Optronics Co., Ltd. |
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