CN106707590A - Display panel over-temperature protection system and display panel over-temperature protection method - Google Patents
Display panel over-temperature protection system and display panel over-temperature protection method Download PDFInfo
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- CN106707590A CN106707590A CN201710109078.0A CN201710109078A CN106707590A CN 106707590 A CN106707590 A CN 106707590A CN 201710109078 A CN201710109078 A CN 201710109078A CN 106707590 A CN106707590 A CN 106707590A
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- display panel
- driving current
- overheat protector
- microprocessor
- module
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a display panel over-temperature protection system and a display panel over-temperature protection method. The display panel over-temperature protection system comprises a display panel, a power management chip electrically connected with the display panel and a microprocessor electrically connected with the power management chip; the power management chip comprises an output module and an over-temperature protection module and an analog-digital converter which are respectively and electrically connected with the output module, the output module is electrically connected with the display panel, the analog-digital converter and the over-temperature protection module are respectively and electrically connected with the microprocessor, drive current is collected through the analog-digital converter which converts the drive current from an analog signal into a digital signal to be sent to the microprocessor, and the microprocessor compares the digital signal with a default drive current threshold and controls operation of the over-temperature protection module according to the comparison result. Detection precision of the drive current is improved by the aid of digitized detection and control method, adjusting method of the drive current threshold is simplified, over-temperature protection effect is improved, and quality of the display panel is guaranteed.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of display panel overheat protector system and overheat protector side
Method.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) has thin fuselage, power saving, radiationless etc. numerous excellent
Point, is widely used, such as：LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen
Curtain or notebook computer screen etc., occupy an leading position in flat display field.
Liquid crystal display major part on existing market is backlight liquid crystal display, and it includes liquid crystal display panel and the back of the body
Light module (Backlight Module).The operation principle of liquid crystal display panel is in thin-film transistor array base-plate (Thin
Film Transistor Array Substrate, TFT Array Substrate) and colored filter substrate (Color
Filter, CF) between pour into liquid crystal molecule, and apply on two plate bases driving voltage and control the rotation side of liquid crystal molecule
To the light of backlight module is reflected into generation picture.
With continuing to develop for liquid crystal display industry manufacturing technology, reduces cost has been the topmost development of current industry
One of direction.In addition to optimizing the processing procedure of liquid crystal display, developing new material to reduce production cost, by correlation function mould
Block, circuit etc. are integrated to LCD intralamellar part, are such as directly produced on gated sweep drive circuit using array process thin
(Gate Driver on Array, GOA) replaces the external gated sweep to drive the technologies such as IC on film transistor array base palte
Be also numerous liquid crystal display panel manufacturers fall over each other exploitation Hot Contents, further to reduce production cost.
When the liquid crystal display panel processing procedure of high integration is carried out, it is necessary to more harsh manufacturing environment, if manufacture ring
Metallic foreign body (Metal Particle) that particulate dirty (Particle), production equipment in border are produced etc. is during processing procedure
Descend slowly and lightly into glass substrate, in addition to the taste of liquid crystal display panel can be caused bad, produce short circuit existing between more causing circuit
As this short circuit phenomenon not only results in picture display exception, circuit temperature is increased when persistently using and even result in liquid
LCD panel burns.Short circuit between circuit such as cannot be detected in production, product certainly exists huge hidden danger of quality, good
Rate declines, and causes customer complaint and product is recalled (Call Back) in batches, causes production cost to be substantially increased.
For above mentioned problem, prior art typically by using power management chip (Power Management IC,
PMIC) internal overcurrent protection (Over Current Protection, OCP) function avoids the display panel internal cause from continuing
High current and the temperature that causes rises or even melts screen problem, its size for passing through the driving current for detecting power management chip output
Decide whether to start excess current protective function, but it is all analog (Analog) electric current that current power management chip uses
Circuit for detecting, it is not high to there is detecting precision, threshold value regulation inconvenience, the problems such as easily manslaughter non-defective unit.
The content of the invention
It is an object of the invention to provide a kind of overheat protector system of display panel, it is possible to increase driving current detecting essence
Degree, simplifies driving current threshold value adjusting method, improves product yield, reduces customer complaint.
The present invention also aims to provide a kind of excess temperature protection method of display panel, it is possible to increase driving current is detected
Precision, simplifies driving current threshold value adjusting method, improves product yield, reduces customer complaint.
To achieve the above object, the invention provides a kind of overheat protector system of display panel, including：Display panel,
The microprocessor that the power management chip being electrically connected with the display panel and the power management chip are electrically connected with；
The power management chip includes：Output module, overheat protector module, the mould being electrically connected with output module
Number converter；
The output module is electrically connected with the display panel, the analog-digital converter, overheat protector module respectively with
The microprocessor is electrically connected with.
The output module, for the display panel output driving current, the driving current to be analog signal；Institute
Analog-digital converter is stated, for gathering the driving current of the output module output, and the driving current of collection modulus turn is carried out into
Change, generate data signal, and the data signal of generation is sent to microprocessor；The microprocessor, for by the numeral
Signal and default driving current threshold value are compared, and obtain comparative result, and for controlling the excess temperature according to comparative result
Protection module starts or closes；The overheat protector module, for reducing the driving that the output module is exported to display panel
Electric current, to carry out overheat protector.
The microprocessor, it is that data signal is more than or equal to the driving current threshold value to be additionally operable in the comparative result
When, control the overheat protector module to start；
The microprocessor, it is that data signal is less than the default driving current threshold value to be additionally operable in the comparative result
When, control the overheat protector module to close.
The microprocessor is the time schedule controller of the display panel.
The power management chip is located on same circuit board with the time schedule controller of the display panel.
The power management chip is electrically connected with microprocessor by I2C buses.
The present invention provides a kind of excess temperature protection method of display panel, is applied to the overheat protector system of above-mentioned display panel
System, comprises the following steps：
, to the display panel output driving current, the driving current is for step 1, the output module of power management chip
Analog signal；
Step 2, the analog-digital converter of the power management chip gather the driving current of the output module output, and will
The driving current of collection carries out analog-to-digital conversion, generates data signal, and the data signal of generation is sent into microprocessor；
Be compared for the data signal and default driving current threshold value by step 3, the microprocessor, is compared
As a result, and according to comparative result control overheat protector module to start or close, reduced by starting the overheat protector module
The output module carries out overheat protector to the driving current that display panel is exported.
In the step 3, when comparative result for the data signal of driving current is electric more than or equal to the default driving
During stream threshold value, the microprocessor controls the overheat protector module to start；
When comparative result is less than the default driving current threshold value for the data signal of driving current, the microprocessor
Device controls the overheat protector module to close.
Beneficial effects of the present invention：The present invention provides the overheat protector system and excess temperature protection method of a kind of display panel,
The overheat protector system of the display panel by adding analog-digital converter in power management chip, using analog-digital converter by electricity
The driving current of the output module output of source control chip is converted from analog into data signal, then will be described by microprocessor
Data signal and default driving current threshold value are compared, and obtain comparative result, and control overheat protector according to comparative result
Module starts or closes, and the driving that the output module is exported to display panel is reduced by starting the overheat protector module
Electric current carries out overheat protector, and the detecting precision of driving current is improved using digitized detecting and control method, simplifies and drives
Current threshold adjusting method, it is to avoid display panel melts screen phenomenon because temperature is too high, lifts overheat protector effect, it is ensured that product
Quality, reduces customer complaint.
Brief description of the drawings
In order to be able to be further understood that feature of the invention and technology contents, refer to below in connection with of the invention detailed
Illustrate and accompanying drawing, however accompanying drawing only provide with reference to and explanation use, not for being any limitation as to the present invention.
In accompanying drawing,
Fig. 1 is the structure chart of the overheat protector system of display panel of the invention；
Fig. 2 is the flow chart of the excess temperature protection method of display panel of the invention；
Fig. 3 is the drive current waveform figure of the overheat protector system of display panel of the invention.
Specific embodiment
Further to illustrate technological means and its effect that the present invention is taken, it is preferable to carry out below in conjunction with of the invention
Example and its accompanying drawing are described in detail.
Refer to Fig. 1, a kind of overheat protector system of display panel that the present invention is provided, including：Display panel 1 and institute
State the power management chip (Power Management IC) 2 and the electricity of the power management chip 2 of the electric connection of display panel 1
Property connection microprocessor 3；
The power management chip 2 includes：Output module 21, the overheat protector mould being electrically connected with output module 21
Block 22, analog-digital converter (Analog to Digital Converter) 23；
The output module 21 is electrically connected with the display panel 1, the analog-digital converter 23, overheat protector module 22
It is electrically connected with the microprocessor 3 respectively.
Specifically, the output module 21, for the output driving current of the display panel 1, the driving current is
Analog signal；
The analog-digital converter 23, the driving current for gathering the output of the output module 21, and the driving that will be gathered
Electric current carries out analog-to-digital conversion, generates data signal, and the data signal of generation is sent into microprocessor 3；
The microprocessor 3, for the data signal and default driving current threshold value to be compared, is compared
As a result, and for controlling the overheat protector module 22 to start or close according to comparative result；
The overheat protector module 22, for reducing the driving current that the output module 21 is exported to display panel 1, with
Carry out overheat protector.
Further, the microprocessor 3 is that data signal drives electricity more than or equal to described in the comparative result
During stream threshold value, the overheat protector module 22 is controlled to start and described default for data signal is less than in the comparative result
During driving current threshold value, the overheat protector module 22 is controlled to close.
Preferably, the microprocessor 3 is the time schedule controller (TCON) of the display panel, the power management chip
2 are located on same circuit board with the time schedule controller of the display panel, i.e. time schedule controller circuit board (TCON Board)
On.Preferably, the power management chip 2 passes through inter-integrated circuit (Inter-Integrated with microprocessor 3
Circuit, I2C) bus electric connection.
More specifically, referring to Fig. 3, the course of work of the overheat protector system of the display panel is：Display surface first
Plate is started working, and the analog signal of the collection driving current of the analog-digital converter 23 is simultaneously converted into the data signal of driving current and carries
Supply microprocessor 3, the microprocessor 3 monitors the conversion of driving current according to the data signal of driving current, during beginning, shows
Show the normal work of panel 1 (not short circuit), driving current stabilization is exported, and overheat protector module 22 is closed, and then display panel 1 is in work
Occur poor short circuit during work, driving current starts constantly rising, while the temperature of display panel 1 also constantly rises, when micro-
When processor 3 monitors driving current and rises to default driving current threshold value, then overheat protector module 22 is controlled to open, excess temperature
The driving current of the reduction output of 22 controlled output module of protection module 21, to cause the temperature drop of display panel 1, works as microprocessor
Device 3 monitors driving current and drops to when below default driving current threshold value, then control overheat protector module 22 to close, and exports
Module is continued to output, and display panel 1 normally shows and will not melt screen because temperature is too high all the time in enabling to whole process
Phenomenon, is effectively ensured product quality, reduces customer complaint.
Further, the default driving current threshold value can be adjusted as needed, only need to change micro- during adjustment
The corresponding processing routine of processor 3, adjustment process is simple and convenient, it is adaptable to all kinds of display panels.
Acquisition precision for driving current can be realized by increasing position (bit) number of analog-digital converter 23, described
The digit of analog-digital converter 23 is higher, and the acquisition precision of the driving current is also higher, analog compared to of the prior art
Current-sensing circuit precision is substantially improved, and can be prevented effectively from and manslaughter non-defective unit, it is ensured that product yield.
Fig. 2 is referred to, the present invention also provides a kind of excess temperature protection method of display panel, it is adaptable to above-mentioned display panel
Overheat protector system, comprise the following steps：
Step 1, the output module 21 of power management chip 2 are to the output driving current of the display panel 1, the driving electricity
It is analog signal to flow.
Step 2, the analog-digital converter 23 of the power management chip 2 gather the driving electricity of the output of the output module 21
Stream, and the driving current of collection is carried out into analog-to-digital conversion, data signal is generated, and the data signal of generation is sent to microprocessor
Device 3.
Specifically, the acquisition precision of the driving current can be by increasing position (bit) number of analog-digital converter 23 come real
Existing, the digit of the analog-digital converter 23 is higher, and the acquisition precision of the driving current is also higher, compared to of the prior art
Analog current-sensing circuit precision is substantially improved, and can be prevented effectively from and manslaughter non-defective unit, it is ensured that product yield.
Be compared for the data signal and default driving current threshold value by step 3, the microprocessor 3, is compared
Relatively result, and control overheat protector module 22 to start or close according to comparative result, by starting the overheat protector module 22
To reduce the output module 21 overheat protector is carried out to the driving current that display panel 1 is exported.
Specifically, in the step 3, when comparative result for the data signal of driving current is electric more than the default driving
During stream threshold value, the microprocessor 3 controls the overheat protector module 22 to start；When comparative result is the numeral letter of driving current
Number less than the default driving current threshold value when, the microprocessor 3 controls the overheat protector module 22 to close.
Further, the default driving current threshold value can be adjusted as needed, only need to change micro- during adjustment
The corresponding processing routine of processor 3, adjustment process is simple and convenient, it is adaptable to all kinds of display panels.
Specifically, Fig. 3 is referred to, during beginning, the normal work of display panel 1 (not short circuit), driving current stabilization is exported, mistake
Warm protection module 22 is closed, and then poor short circuit occurs in the course of the work in display panel 1, and driving current starts constantly rising,
The temperature of display panel 1 also constantly rises simultaneously, and default driving current threshold is risen to when microprocessor 3 monitors driving current
During value, then overheat protector module 22 is controlled to open, the driving current of the reduction output of 22 controlled output module of overheat protector module 21,
With cause display panel 1 temperature drop, when microprocessor 3 monitor driving current drop to default driving current threshold value with
When lower, then overheat protector module 22 is controlled to close, output module 21 is continued to output, and enables to display panel 1 in whole process
All the time it is normal to show and screen phenomenon be melted because temperature is too high, product quality is effectively ensured, reduce customer complaint.
In sum, the present invention provides the overheat protector system and excess temperature protection method of a kind of display panel, and it uses mould
Number converter replaces existing analog current circuit for detecting, and the driving electricity that power management chip is exported is gathered by analog-digital converter
The analog signal of stream is simultaneously converted into the data signal of driving current and is supplied to microprocessor, microprocessor to provide analog-digital converter
The data signal of driving current is compared in real time with default driving current threshold value, and controls overheat protector according to comparative result
The startup or closing of module, by reducing the drive that the output module is exported to display panel after the overheat protector module startup
Streaming current carries out overheat protector, ensures display panel normal work simultaneously display panel temperature is reduced, it is possible to increase drive electricity
Stream detecting precision, simplifies driving current threshold value adjusting method, lifts overheat protector effect, it is ensured that product quality, reduces client and throws
Tell.
The above, for the person of ordinary skill of the art, can be with technology according to the present invention scheme and technology
Other various corresponding changes and deformation are made in design, and all these changes and deformation should all belong to the claims in the present invention
Protection domain.
Claims (8)
1. the overheat protector system of a kind of display panel, it is characterised in that including：Display panel (1) and the display panel
(1) microprocessor (3) that the power management chip (2) and the power management chip (2) being electrically connected with are electrically connected with；
The power management chip (2) includes：Output module (21), the overheat protector being electrically connected with output module (21)
Module (22), analog-digital converter (23)；
The output module (21) is electrically connected with the display panel (1), the analog-digital converter (23), overheat protector module
(22) it is electrically connected with the microprocessor (3) respectively.
2. the overheat protector system of display panel as claimed in claim 1, it is characterised in that the output module (21), uses
In to the display panel (1) output driving current, the driving current is analog signal；The analog-digital converter (23), uses
In the driving current for gathering output module (21) output, and the driving current of collection is carried out into analog-to-digital conversion, generation numeral
Signal, and the data signal of generation is sent to microprocessor (3)；The microprocessor (3), for by the data signal and
Default driving current threshold value is compared, and obtains comparative result, and for controlling the overheat protector mould according to comparative result
Block (22) starts or closes；The overheat protector module (22) is defeated to display panel (1) for reducing the output module (21)
The driving current for going out, to carry out overheat protector.
3. the overheat protector system of display panel as claimed in claim 2, it is characterised in that the microprocessor (3), also uses
In when the comparative result is that data signal is more than or equal to the driving current threshold value, the overheat protector module is controlled
(22) start；
The microprocessor (3), it is that data signal is less than the default driving current threshold value to be additionally operable in the comparative result
When, control the overheat protector module (22) to close.
4. the overheat protector system of display panel as claimed in claim 1, it is characterised in that the microprocessor (3) is institute
State the time schedule controller of display panel.
5. the overheat protector system of display panel as claimed in claim 4, it is characterised in that the power management chip (2)
Time schedule controller with the display panel is located on same circuit board.
6. the overheat protector system of display panel as claimed in claim 1, it is characterised in that the power management chip (2)
It is electrically connected with by I2C buses with microprocessor (3).
7. a kind of excess temperature protection method of display panel, the display panel being applied to described in any one of the claims 1 to 6
Overheat protector system, it is characterised in that comprise the following steps：
Step 1, the output module (21) of power management chip (2) are to the display panel (1) output driving current, the driving
Electric current is analog signal；
Step 2, the analog-digital converter (23) of the power management chip (2) gather the driving electricity of output module (21) output
Stream, and the driving current of collection is carried out into analog-to-digital conversion, data signal is generated, and the data signal of generation is sent to microprocessor
Device (3)；
Be compared for the data signal and default driving current threshold value by step 3, the microprocessor (3), is compared
As a result, and according to comparative result control overheat protector module (22) to start or close, by starting the overheat protector module
(22) overheat protector is carried out to the driving current that display panel (1) is exported reducing the output module (21).
8. the excess temperature protection method of display panel as claimed in claim 7, it is characterised in that in the step 3, when comparing knot
When being really more than or equal to the default driving current threshold value for the data signal of driving current, microprocessor (3) control
The overheat protector module (22) starts；
When comparative result is less than the default driving current threshold value for the data signal of driving current, the microprocessor
(3) the overheat protector module (22) is controlled to close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109078.0A CN106707590A (en) | 2017-02-27 | 2017-02-27 | Display panel over-temperature protection system and display panel over-temperature protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710109078.0A CN106707590A (en) | 2017-02-27 | 2017-02-27 | Display panel over-temperature protection system and display panel over-temperature protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106707590A true CN106707590A (en) | 2017-05-24 |
Family
ID=58917200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710109078.0A Pending CN106707590A (en) | 2017-02-27 | 2017-02-27 | Display panel over-temperature protection system and display panel over-temperature protection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106707590A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107578754A (en) * | 2017-09-28 | 2018-01-12 | 深圳市华星光电技术有限公司 | The over-current protection system and overcurrent protection method of liquid crystal display panel |
| CN107895565A (en) * | 2017-11-20 | 2018-04-10 | 深圳市华星光电技术有限公司 | A kind of liquid crystal display and its excess temperature protection method |
| US11393412B2 (en) | 2020-04-29 | 2022-07-19 | Asustek Computer Inc. | Electronic device and temperature adjustment method thereof |
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| US11393412B2 (en) | 2020-04-29 | 2022-07-19 | Asustek Computer Inc. | Electronic device and temperature adjustment method thereof |
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Application publication date: 20170524 |
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| RJ01 | Rejection of invention patent application after publication |