CN104616614B - The powering method and device of display module, detection method and device - Google Patents
The powering method and device of display module, detection method and device Download PDFInfo
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- CN104616614B CN104616614B CN201410707006.2A CN201410707006A CN104616614B CN 104616614 B CN104616614 B CN 104616614B CN 201410707006 A CN201410707006 A CN 201410707006A CN 104616614 B CN104616614 B CN 104616614B
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Abstract
The invention provides a kind of powering method of display module and device, detection method and device, the powering method includes：By patch first voltage is provided to display module；Wherein, the display module is suitable to when patch grafting is normal, for the first voltage output feedback signal；After detecting the display module to the feedback signal of the first voltage, second voltage is provided to the display module by the patch；Wherein, the second voltage is higher than the first voltage.The powering method of display module provided by the invention, the output HIGH voltage in patch grafting exception can be avoided, so as to avoid burning the electronic component in display module.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of powering method of display module and device, detection method
And device.
Background technology
Liquid crystal display is the display product of current main flow, and its principle is the photoelectric characteristic using liquid crystal, and additional
Change the liquid crystal anglec of rotation and arrangement mode under electric field action to realize the dispaly state of liquid crystal display die set.In liquid crystal display
Before dispatching from the factory, it is necessary to the display module MDL (Module, including display panel and backlight) of liquid crystal display is detected with
Judge whether display is normal.As shown in figure 1, it is usually to be passed through using electrifying device (such as lighting system etc.) in the prior art
Operating voltage line in patch applies operating voltage for driving display panel to display module and by patch
Backlight voltage line applies to display module for driving the backlight driver voltage of backlight, and passes through the data in patch
Pressure-wire applies data voltage to display panel, determines whether display is normal according to the display situation of display afterwards.Upper
, it is necessary to which the patch of electrifying device is plugged into the connector of module first in the detection process stated, patch has more letters
Number line, including operating voltage the line VDD3 and VCI of operating voltage, the data electricity for outputting data signals are provided for display module
Line ball Vdata (data voltage line may include more signal wires in itself, only schematically illustrate with a progress in figure), for carrying out
The reset signal line Reset, the VB/L for providing voltage for backlight etc. of reset, each signal line include two wires
(being illustrated in figure with 1), for forming loop, it is very more so to result in the quantity of wire in patch, stitch density
It is larger.So when being detected, often there is the situation that misplug connects, cause high voltage backlight driver voltage to snap into display
Corresponding to panel on stitch, display panel is caused to be burned out.
The content of the invention
The purpose of the present invention is to avoid burning for the extremely caused display module of grafting.
In order to achieve the above object, the invention provides a kind of detection method of new display module, this method to include：It is logical
Cross display module in patch and first voltage is provided；Wherein, the display module is suitable to when patch grafting is normal, for institute
State first voltage output feedback signal；
After detecting the display module to the feedback signal of the first voltage, shown by the patch to described
Show that module provides second voltage；Wherein, the second voltage is higher than the first voltage.
Further, it is described to provide first voltage by display module in patch, including：
Operating voltage is provided to display module by the operating voltage line in patch, and passes through the data electricity in patch
Line ball is to the display module input data voltage；
It is described after detecting the display module to the feedback signal of the first voltage, by the patch to institute
State display module and second voltage is provided, including：
After detecting the display module to the feedback signal of the data voltage, pass through the backlight in the patch
Source pressure-wire provides backlight driver voltage to the display module.
Further, methods described also includes：
If the display module is not detected in the preset time to after the display module input data voltage
To the feedback signal of the data voltage, stop providing operating voltage to the display module.
Further, methods described also includes：
If the display module is not detected in the preset time to after the display module input data voltage
To the feedback signal of the data voltage, the first cue is exported.
Further, methods described also includes：
After detecting the display module to the feedback signal of the data voltage, the second cue is exported.
Further, methods described also includes：
When detecting electric signal, stop providing backlight driver voltage to display module, export the 3rd prompting afterwards
Signal.
Present invention also offers a kind of detection method of display module, including display module described in any of the above-described is upper
Method for electrically.
The invention provides a kind of electrifying device of display module, including：
First voltage output module, for providing first voltage to display module by patch；Wherein, the display mould
Group is suitable to when patch grafting is normal, for the first voltage output feedback signal；
Detection module, for detecting feedback signal of the display module to the first voltage；
Second voltage output module, after detecting feedback signal for the detection module, by the patch to institute
State display module and second voltage is provided；Wherein, the second voltage is higher than the first voltage.
The first voltage output module includes：
Operating voltage output module, for providing operating voltage to display module by the operating voltage line in patch；
Data voltage output module, for by the data voltage line in patch to the display module input data voltage；
The second voltage output module includes：
Backlight voltage output module, for detecting the display module to the data voltage in the detection module
Feedback signal after, by the backlight voltage line in the patch to the display module provide backlight driver voltage.
Further, if in the data voltage output module to default after the display module input data voltage
The detection module does not detect feedback signal of the display module to the data voltage, the operating voltage in time
Output module stops providing operating voltage to the display module.
Further, the electrifying device also includes：First reminding module, in the data voltage output module to institute
Stating the detection module in the preset time after display module input data voltage does not detect the display module to institute
When stating the feedback signal of data voltage, the first cue is exported.
Further, the electrifying device also includes：Second reminding module, it is described aobvious for being detected in the detection module
After showing module to the feedback signal of the data voltage, the second cue is exported.
Further, the backlight voltage output module, when the electrifying device detects electric signal, stop to
Display module provides backlight driver voltage；
Described device also includes：
3rd reminding module, for stopping providing backlight driver to display module in the backlight voltage output module
After voltage, the 3rd cue is exported.
The invention provides a kind of detection means of display module, include the electrifying device of display module described above.
The powering method of display module provided by the invention, a relatively low first voltage is exported to display module first,
After the display module is received to the feedback signal of the first voltage, by the second channel in the patch to institute
State display module and the second higher electricity is provided.In this way, the output HIGH voltage in patch grafting exception can be avoided,
So as to avoid burning the electronic component in display module.
Brief description of the drawings
Fig. 1 is the connection diagram of electrifying device and display module when being detected by electrifying device to display module；
Fig. 2 is the schematic flow sheet of the powering method of the display module of the offer of the present invention；
Fig. 3 is a kind of possible timing diagram of the signal exported in the method in Fig. 2 in power up phase；
Fig. 4 is in a kind of possible timing diagram for the signal for going electric stage output in the method in Fig. 2；
Fig. 5 is the structural representation of the electrifying device of display module provided by the invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is further described.Following examples are only
For clearly illustrating technical scheme, and can not be limited the scope of the invention with this.
The invention provides a kind of powering method of display module, this method can have electrifying device execution, such as Fig. 2 institutes
Show, this method includes：
Step 201, first voltage is provided to display module by patch；Wherein, the display module is suitable in grafting
When line grafting is normal, for the first voltage output feedback signal.
In actual applications, can burned corresponding instruction in the driving IC to display module in advance, detecting it
When data voltage line is normally plugged into display module, a specific code work is returned for the first voltage of electrifying device input
For feedback signal.
So, electrifying device to display module by patch after first voltage is provided, if patch grafting is normal,
Then display module can normally receive first voltage, the first voltage output feedback signal can be now directed to, if grafting
Abnormal, display module will not normally receive the first voltage, can not also return to feedback signal.
Display module can be directed to first voltage output feedback signal, such as pass through data electricity when detecting that grafting is normal
Line ball or All other routes.
Step 202, after detecting the display module to the feedback signal of the first voltage, the patch is passed through
Second voltage is provided to the display module；Wherein, the second voltage is higher than the first voltage.
The powering method of display module provided by the invention, a relatively low first voltage is exported to display module first,
After the display module is received to the feedback signal of the first voltage, by the second channel in the patch to institute
State display module and the second higher electricity is provided.In this way, the output HIGH voltage in patch grafting exception can be avoided,
So as to avoid burning the electronic component in display module.
Further, above-mentioned step 201 can include：
Operating voltage is provided to display module by the operating voltage line in patch, and passes through the data electricity in patch
Line ball is to the display module input data voltage.
Above-mentioned step 202 can include：
After detecting the display module to the feedback signal of the data voltage, pass through the backlight in the patch
Source pressure-wire provides backlight driver voltage to the display module.
Now, electrifying device can detect the feedback signal by the data voltage line of output data voltage.If insert
Wiring grafting is normal, then operating voltage line can normally provide operating voltage to display module, and data voltage can be normal
Display module is output to, so, display module can be directed to the data voltage and send feedback signal.If patch grafting is different
Often, then display module can not be normally input to by being likely to result in operating voltage or data voltage, and display module also will not pin
Feedback signal is produced to data voltage, electrifying device can not detect the feedback signal of display module accordingly.This sample is sent out
The powering method of bright offer, it can avoid backlight driver voltage output to module in the state of patch grafting exception,
Avoid burning for display module.
Certainly in practical application, those skilled in the art can also select other voltages as first voltage, and obtain
Corresponding feedback signal is taken, the preferred embodiment of the present invention should not be construed limiting the scope of the present invention.
Further, this method is also included not shown in figure：
If the display module is not detected in the preset time to after the display module input data voltage
To the feedback signal of the data voltage, stop providing operating voltage to the display module.
In practical application, the voltage ratio of operating voltage is relatively low, will not typically burn the electronic component in display module, still
In some extreme environments, operating voltage is passed through for a long time it is possible to causing the damage of part electronic component in display module
(for example may cause to drive the data voltage line in IC to burn), on this basis, of the invention optional embodiment party
In formula, if not detecting the display module to institute in the preset time to after the display module input data voltage
The feedback signal of data voltage is stated, stops providing operating voltage to the display module.It is further ensured that the security of detection.
Further, methods described is also included not shown in figure：
If the display module is not detected in the preset time to after the display module input data voltage
To the feedback signal of the data voltage, the first cue is exported.
In this way, the failure that can remind testing staff current in time be it is extremely caused by patch grafting,
Testing staff is set quickly to position failure.
In the specific implementation, the first cue here can be red light, or voice signal, such as can be with defeated
Go out voice as " grafting mistake, please grafting again ", to prompt testing staff to plug again.Certainly, in actual applications, only
Backlight driver voltage is not exported when judging grafting exception, even if not exporting the first cue, can reach yet and avoid showing
Show the purpose burnt of module, corresponding technical scheme should also fall into protection scope of the present invention.
Further, this method can also include：
After detecting the display module to the feedback signal of the data voltage, the second cue is exported.
Advantage of this is that testing staff can be made to determine that patch is normal according to the second cue, if display
Module still can not be normally lit, then explanation is that display module is unqualified, avoids whether grafting is normally carried out investigating to patch.
Further, this method can also be included not shown in figure：
When detecting electric signal, stop providing backlight driver voltage to display module, export the 3rd prompting afterwards
Signal.
Here the 3rd cue can be consistent with the second above-mentioned cue, for example is green light signals.For
Prompting tester can pull out patch.Advantage of this is that it can avoid exporting backlight driver to display module
Patch is extracted in the state of voltage, so as to avoid causing burning for display module on the stitch of high voltage contact low-voltage.
The detection method of display module provided by the invention is carried out further with reference to specific application scenarios
It is bright, it is assumed that the display for needing to detect is the display of 8inch panels, and operating voltage VDD3, VCI, size is respectively 1.8V
And 3.3V, the size of backlight driver voltage is 20V, and display can produce the public affairs of driving display panel according to the operating voltage
Common voltage and gate drive voltage etc., as shown in figure 3, by one kind of the signal exported in the method in Fig. 2 in power up phase
Possible timing diagram, electrifying device are receiving power on signal (power on signal in actual applications, here and hereinafter
Go the switching signal that electric signal can be tester's input) after, the application 1.8V voltage first on VDD3, on VCI
Apply 3.3V voltage, apply a reset signal on Reset afterwards, detected after reset signal is sent by Vdata
Whether the feedback signal of display module is able to detect that, if it is, providing wire corresponding to the VB/L of voltage for backlight
Upper application 20V voltage (shown in Fig. 3 for the normal situation of grafting), is not otherwise applying backlight on wire corresponding to VB/L
Source driving voltage.Here reset signal understands unanimously with of the prior art, is the signal that value is resetted to display.
As shown in figure 4, in the method in Fig. 2 in a kind of possible timing diagram for the signal for going the output of electric stage.Upper electricity
Device stops providing backlight driver voltage VB/L to display module first, sends one afterwards after electric signal is received
Individual reset signal, the first preset time (such as 120ms) after reset signal is sent stop exporting to display module afterwards
Operating voltage VDD3 and VCI.On the other hand, after the second preset time (such as 500ms) of reset signal is sent, is sent
Three indication signals (display green light), tester is reminded to plug patch.Now, will not because high voltage is broken
Burn the electronic device in display module.
Present invention also offers a kind of detection method of display module, this method is included according to aobvious described in any of the above-described
Show that the powering method of module carries out upper electric step to display module.
Present invention also offers a kind of display module electrifying device, available for the detection side for realizing above-mentioned display module
Method, as shown in figure 5, the device includes：
First voltage output module 501, for providing first voltage to display module by patch；Wherein, it is described aobvious
Show that module is suitable to when patch grafting is normal, for the first voltage output feedback signal；
Detection module 502, for detecting feedback signal of the display module to the first voltage；
Second voltage output module 503, after detecting feedback signal for the detection module 502, pass through the grafting
Line provides second voltage to the display module；Wherein, the second voltage is higher than the first voltage.
In the specific implementation, after detection module being made to detect feedback signal, a signal is provided.This signal may
Be feedback signal in itself, be also likely to be not feedback signal in itself, for example be only a trigger signal, the output of this trigger signal
Onto second voltage transmission of electricity module, from second voltage output module accordingly judge and provide the second electricity to display module
Pressure.
Preferably, first voltage output module 501 specifically includes：
Operating voltage output module, for providing operating voltage to display module by the operating voltage line in patch；
Data voltage output module, for electric to the display module input data by the data voltage line in patch
Pressure；
Second voltage output module 503 specifically includes：
Backlight voltage output module, for detecting the display module to the data voltage in the detection module
Feedback signal after, by the backlight voltage line in the patch to the display module provide backlight driver voltage.
Further, if in the data voltage output module to default after the display module input data voltage
The detection module 502 does not detect feedback signal of the display module to the data voltage, the work in time
Voltage output module stops providing operating voltage to the display module.
In actual applications, such as there can be the timer for being set with and determining duration in detection module, in the number
During according to voltage output module to the display module input data voltage, start timer, if receiving feedback in the duration
Signal, then stop timing, when being not received by feedback signal in the duration, timer can time-out, now detection module is to work
Make voltage output module and export a signal, triggering operating voltage output module stops providing operating voltage to display module.Or
Timer can also be arranged in operating voltage output module by person, and set detection module after reception of a feedback signal,
A signal is exported to operating voltage output module, if within the default time, operating voltage output module receives such
Signal, then stop timer, if being not received by such signal, timer expiry can be caused, now operating voltage output mould
Block stops providing operating voltage to display module.
Further, in addition to not shown in figure：First reminding module, for the display module input data
The detection module 502 does not detect feedback of the display module to the data voltage in preset time after voltage
During signal, the first cue is exported.
Further, in addition to not shown in figure：Second reminding module, for being detected in the detection module 502
After the display module is to the feedback signal of the data voltage, the second cue is exported.
Further, the backlight voltage output module, when the detection module 502 detects electric signal, stop
Only backlight driver voltage is provided to display module；
Described device is also included not shown in figure：
3rd reminding module, for stopping providing backlight driver to display module in the backlight voltage output module
After voltage, the 3rd cue is exported.
Present invention also offers a kind of detection means of display module, including display module described in any of the above-described is upper
Electric installation.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Member, module and step, it can be realized with hardware, software, firmware or their combination.These functions are come in which way actually
Realize, application-specific and design constraint depending on technical scheme.Those skilled in the art can specifically should to each
For realizing described function using distinct methods, but this realization is it is not considered that beyond the scope of this invention.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (14)
- A kind of 1. powering method of display module, it is characterised in that including：By patch first voltage is provided to display module；Wherein, the display module is suitable to when patch grafting is normal, For the first voltage output feedback signal；After detecting the display module to the feedback signal of the first voltage, by the patch to the display mould Group provides second voltage；Wherein, the second voltage is higher than the first voltage.
- 2. the method as described in claim 1, it is characterised in that it is described to provide first voltage to display module by patch, Including：Operating voltage is provided to display module by the operating voltage line in patch, and passes through the data voltage line in patch To the display module input data voltage；It is described after detecting the display module to the feedback signal of the first voltage, by the patch to described aobvious Show that module provides second voltage, including：After detecting the display module to the feedback signal of the data voltage, pass through the backlight electricity in the patch Line ball provides backlight driver voltage to the display module.
- 3. method as claimed in claim 2, it is characterised in that methods described also includes：If do not detect the display module to institute in the preset time to after the display module input data voltage The feedback signal of data voltage is stated, stops providing operating voltage to the display module.
- 4. method as claimed in claim 2 or claim 3, it is characterised in that methods described also includes：If do not detect the display module to institute in the preset time to after the display module input data voltage The feedback signal of data voltage is stated, exports the first cue.
- 5. method as claimed in claim 2 or claim 3, it is characterised in that methods described also includes：After detecting the display module to the feedback signal of the data voltage, the second cue is exported.
- 6. method as claimed in claim 2 or claim 3, it is characterised in that methods described also includes：When detecting electric signal, stop providing backlight driver voltage to display module, export the 3rd cue afterwards.
- 7. a kind of detection method of display module, include the powering method of the display module as described in claim any one of 1-6.
- A kind of 8. electrifying device of display module, it is characterised in that including：First voltage output module, for providing first voltage to display module by patch；Wherein, the display module is fitted In when patch grafting is normal, for the first voltage output feedback signal；Detection module, for detecting feedback signal of the display module to the first voltage；Second voltage output module, after examining feedback signal for the detection module, by the patch to the display mould Group provides second voltage；Wherein, the second voltage is higher than the first voltage.
- 9. electrifying device as claimed in claim 8, it is characterised in thatThe first voltage output module includes：Operating voltage output module, for providing operating voltage to display module by the operating voltage line in patch；Data voltage output module, for by the data voltage line in patch to the display module input data voltage；The second voltage output module includes：Backlight voltage output module, for detecting the display module to the anti-of the data voltage in the detection module After feedback signal, backlight driver voltage is provided to the display module by the backlight voltage line in the patch.
- 10. electrifying device as claimed in claim 9, it is characterised in that if showing in the data voltage output module to described Show that the detection module does not detect the display module to the number in the preset time after module input data voltage According to the feedback signal of voltage, the operating voltage output module stops providing operating voltage to the display module.
- 11. the electrifying device as described in claim 9 or 10, it is characterised in that also include：First reminding module, in institute Stating data voltage output module detection module into the preset time after the display module input data voltage does not have When detecting the display module to the feedback signal of the data voltage, the first cue is exported.
- 12. the electrifying device as described in claim 9 or 10, it is characterised in that also include：Second reminding module, in institute State after detection module detects the display module to the feedback signal of the data voltage, export the second cue.
- 13. the electrifying device as described in claim 9 or 10, it is characterised in that the backlight voltage output module, described When electrifying device detects electric signal, stop providing backlight driver voltage to display module；Described device also includes：3rd reminding module, for stopping providing backlight driver voltage to display module in the backlight voltage output module Afterwards, the 3rd cue is exported.
- 14. a kind of detection means of display module, include the upper Denso of the display module as described in claim any one of 8-13 Put.
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| CN105741721B (en) * | 2016-05-05 | 2019-04-12 | 苏州华兴源创科技股份有限公司 | A kind of power-on protection method and system for liquid crystal detection |
| CN106297711B (en) * | 2016-09-18 | 2019-04-05 | 深圳市华星光电技术有限公司 | Display module driving circuit, driving method and display module |
| CN107613619B (en) * | 2017-09-22 | 2019-06-04 | 京东方科技集团股份有限公司 | Lighting control circuit and signal split screen and with defencive function convert lighting-up equipment |
| CN108053782B (en) * | 2017-12-08 | 2021-09-10 | 京东方科技集团股份有限公司 | Display panel testing method and signal generator |
| TWI720737B (en) * | 2019-12-16 | 2021-03-01 | 新唐科技股份有限公司 | Microcontroller circuit and control method thereof |
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