CN110097860A - Display module - Google Patents
Display module Download PDFInfo
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- CN110097860A CN110097860A CN201910306787.7A CN201910306787A CN110097860A CN 110097860 A CN110097860 A CN 110097860A CN 201910306787 A CN201910306787 A CN 201910306787A CN 110097860 A CN110097860 A CN 110097860A
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- Prior art keywords
- circuit
- signal
- power management
- output end
- electric power
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
Abstract
The invention discloses a kind of display modules, including gate driving circuit, source electrode drive circuit, level conversion unit and electric power management circuit, it is characterized in that, further include: chip protection circuit, the first input end of the chip protection circuit connects a functional pin of the level conversion unit, second input terminal and third input terminal are connect with the positive voltage output end of the electric power management circuit and negative voltage output end respectively, the chip protection circuit is for receiving electric discharge enabling signal, and the voltage output path of the electric power management circuit is connected to or disconnected according to the electric discharge enabling signal.Display module disclosed in this invention can detect the state of electric discharge enabling signal in real time, and protect the voltage output for disconnecting power module in mould group by chip protection circuit when discharging enabling signal exception, and protection circuit element is injury-free.
Description
Technical field
The present invention relates to field of display technology, and in particular to a kind of display module.
Background technique
The display panel of traditional display module such as liquid crystal display include gate driving circuit, source electrode drive circuit and
Pixel array.Pixel array is arranged by multiple dot structures, and in general, dot structure mainly by thin film transistor (TFT),
Scan line, data line, storage capacitors and liquid crystal cells composition, each thin film transistor (TFT) include grid, drain electrode and source electrode, and every
The grid of one thin film transistor (TFT) is connected to scan line, and drain electrode is connected to data line, and source electrode is connected to one end of storage capacitors.Grid
The output end of driving circuit is coupled to pixel array, to drive these dot structures, is connect with opening or closing with scan line
Multiple thin film transistor (TFT)s.Source electrode drive circuit is connected with the multiple data lines, is it when multiple thin film transistor (TFT)s are opened
Grayscale is provided and shows voltage, so as to be stored with video signal in each dot structure.Since liquid crystal display is in display image
When, meeting stored charge in the storage capacitors between two comparative electrodes (such as public electrode and pixel electrode).Work as liquid crystal display
Display panel power cutoff when, these stored charges will make corresponding pixel be in different grayscale, thus in display screen
The upper some images of residual.
Referring to FIG. 1, Fig. 1 shows a kind of structural schematic diagram of display module in the prior art.As shown in Figure 1, the display
Mould group includes display panel 100, wiring board 200 and pcb board 300, and the display panel 100 is via 200 connecting PCB board of wiring board
300.Gate driving circuit 110, source electrode drive circuit 120 and pixel array is provided on the display panel 100 (not show in figure
Out).Pixel array is arranged to make up by multi-strip scanning line, multiple data lines and multiple pixel units positioned at crossover location, often
A pixel unit includes thin film transistor (TFT) and pixel electrode, and the grid of thin film transistor (TFT) passes through grid line and gate driving circuit
110 are connected, and by being connected with source electrode line with source electrode drive circuit 120, drain electrode is connected the source level of thin film transistor (TFT) with pixel electrode.
Gate driving circuit 110 for scanning a plurality of grid line in order, so that the thin film transistor (TFT) of corresponding line is connected；Source level driving electricity
Road 120 is used to apply gray scale voltage corresponding with display data on the pixel electrode in thin film transistor (TFT) conducting.
Display module further includes the level conversion unit 320 on pcb board 300, a function of level conversion unit 320
Energy pin (XON pin) is connect with the electric power management circuit 310 on pcb board 300, and level conversion unit 320 also passes through route
Plate 200 is connect with the gate driving circuit 110 on display panel 100.Level conversion unit 320 is for receiving electric power management circuit
310 driving voltages sent and electric discharge enabling signal XON, and under the control of electric discharge enabling signal XON according to driving voltage and
Channel data generates multiple gate drive signals, and is conveyed to gate driving circuit 110.
It to solve the above-mentioned problems, is after the closing of display module (liquid crystal display) power supply in the prior art using integrated
XON function on driving circuit (IC) opens the thin film transistor (TFT) of all pixels structure, so that dot structure is quickly put
Electricity.Here XON function refers to, when display panel voltage source is closed, the electric power management circuit on printed circuit board drives to grid
The XON pin of dynamic circuit provides a low level signal so that gate driving circuit by the output voltage of all output ends all
Being pulled up to high-potential voltage VGH, (in general normal display, in a certain time slot, there is usually one output end output high potential electricity
VGH is pressed, remaining output end exports low-voltage VGL, and for VGL generally in -10V between 0V, VGH generally in 10V or more), opens liquid
The grid of all thin film transistor (TFT)s in LCD panel is rapidly neutralized with the mandatory charge by dot structure, is discharged
Fall, to achieve the purpose that eliminate ghost.Wherein voltage VGH, VGL is the power module in liquid crystal display or liquid crystal display panel
Supply the driving voltage of thin film transistor (TFT).
And problems of the prior art are, and it is unstable or inaccurate due to input voltage, work as Input voltage terminal
The electric current of VIN is larger, can lead to electric power management circuit (i.e. power supply chip, Power because of pressure drop when entering circuit board
IC) operation irregularity, electric discharge enabling signal XON can switch between high-low voltage always, lead to the output voltage of electric power management circuit
It cannot completely turn off, be also at ceaselessly switching state, so that the output of level translator (Lever shifter) is not
That stops is pulled to high level VGH, generates high current, so that PCBA (Printed Circuit Board Assembly, printing electricity
Road plate) it is hot, or even chip is burnt out.And found after further testing, as long as chip operating voltage is in a certain range
When, the XON function of gate driving circuit all can this occurs, therefore be easy to burn out chip in test and malfunction.
Aiming at the problems existing in the prior art, there is no any safeguard measure to chip at present, and high current fails
By blown fuse, thus consider such situation, the present invention it is additional to electric power management circuit increase abnormity protection circuit.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of display modules, can detect and discharge in mould group at any time
The state of enabling signal can in time disconnect the voltage output path of power module when occurring extremely.It simultaneously can also be
Maloperation or protection circuit element is injury-free when having abnormal conditions.
What is provided according to the present invention includes: display panel；Gate driving circuit, the gate driving circuit and the display
Panel electrical connection, for providing grid line scanning signal to the display panel；Source electrode drive circuit, the source electrode drive circuit with
The display panel electrical connection, for providing data-signal to the display panel；Level conversion unit, the level conversion list
It is first to be connected with the gate driving circuit, for providing multiple gate drive signals to the gate driving circuit；And power supply
Circuit is managed, the electric power management circuit is electrically connected with the gate driving circuit and the source electrode drive circuit respectively, is used for
Driving voltage is provided to the gate driving circuit and the source electrode drive circuit, and is connect with the level conversion unit,
Electric discharge enabling signal is provided to the level conversion unit when display module switching on and shutting down, which is characterized in that further include: chip
Circuit is protected, the first input end of the chip protection circuit connects functional pin, second of the level conversion unit
Input terminal and third input terminal are connect with the positive voltage output end of the electric power management circuit and negative voltage output end respectively, are used
In the reception electric discharge enabling signal, and according to the voltage for discharging enabling signal connection or disconnecting the electric power management circuit
Outgoing route.
Preferably, the gate driving circuit includes a function of level conversion unit and the gate driving circuit
Pin is the functional pin of the level conversion unit.
Preferably, the chip protection circuit includes: detection module, and the detection module receives electric discharge enabling signal, and
High level signal is exported when the electric discharge enabling signal is continuously high level, or in the electric discharge enabling signal in a timing
It is interior to there is multiple high level and low level to export low level signal and on-off circuit module, the switching circuit mould when changing
Block receives the high level signal of the detection module output, is connected to the voltage output path of the electric power management circuit；Or it connects
The low level signal for receiving the detection module output, disconnects the voltage output path of the electric power management circuit.
Preferably, the detection module is micro-control unit chip.
Preferably, the on-off circuit module includes: the first control path, and first control path is described to receive
One of high level signal and low level signal of detection module output, while on-off is connected according to corresponding level signal
Open the positive voltage outgoing route of the electric power management circuit；Second control path, second control path are described to receive
One of high level signal and low level signal of detection module output, while on-off is connected according to corresponding level signal
Open the negative voltage outgoing route of the electric power management circuit.
Preferably, first control path includes: second switch, the grid of the second switch and the detection
The output end of module connects, drain electrode by the connection of the positive voltage output end of first resistor and electric power management circuit and source electrode with
Ground terminal connection and the 4th switching tube, the grid of the 4th switching tube be grounded by the second switch, source electrode with
Drain electrode receives positive voltage signal and output positive voltage signal respectively.
Preferably, second control path includes: reverse phase adder, and the first input end of the reverse phase adder passes through
3rd resistor is connect with the output end of the detection module, and the second input terminal passes through the 5th resistance eutral grounding and output end and first
The grid of switching tube connects；One end of 4th resistance, the 4th resistance is connect with the first input end of the reverse phase adder,
The other end is connect with the output end of the reverse phase adder；First switch tube, the grid of the first switch tube and the reverse phase
The output end of adder connects, and drain electrode passes through the connection of the negative voltage output end of second resistance and electric power management circuit and source electrode
It is connect with ground terminal and third switching tube, the grid of the third switching tube is grounded by the first switch tube, source electrode
Receive negative voltage signal and output negative voltage signal respectively with drain electrode.
Preferably, second control path includes: phase inverter, the input terminal of the phase inverter and the detection module
The grid of output end connection, output end and first switch tube connects；First switch tube, the grid of the first switch tube and institute
The output end connection of phase inverter is stated, drain electrode passes through the connection of the negative voltage output end of second resistance and electric power management circuit and source
Pole is connect with ground terminal and third switching tube, and the grid of the third switching tube is grounded by the first switch tube, source
Pole and drain electrode receive negative voltage signal and output negative voltage signal respectively.
Preferably, the second switch is NMOS transistor, and the 4th switching tube is PMOS transistor.
Preferably, the first switch tube is PMOS transistor, and the third switching tube is NMOS transistor.
The beneficial effects of the present invention are: the invention discloses a kind of display modules, by the way that chip is arranged in display module
Circuit is protected, the detection module that can use in chip circuit carries out detecting real-time to enabling signal of discharging in display module, with
Just power supply can be disconnected in time when an anomaly occurs；It is provided with on-off circuit module after the detection module of chip protection circuit,
On-off circuit module can disconnect the connection of power supply and other driving circuits in maloperation or while having abnormal occur, and protection element is not
It is damaged, avoids unnecessary loss.Meanwhile the chip protection circuit in display module disclosed in this invention is applicable
In on any power protecting circuit, use scope is wide.
Detailed description of the invention
By referring to the drawings to the description of the embodiment of the present invention, above-mentioned and other purposes of the invention, feature and
Advantage will be apparent from.
The structure that Fig. 1 shows a kind of display module in the prior art is intended to；
Fig. 2 shows the structural schematic diagrams of display module a kind of in the embodiment of the present invention；
Fig. 3 shows the system block diagram of chip protection circuit in display module of the embodiment of the present invention；
Fig. 4 shows the circuit structure diagram of chip protection circuit in first embodiment of the invention display module；
Fig. 5 shows the circuit structure diagram of chip protection circuit in second embodiment of the invention display module；
Fig. 6 shows the work flow diagram of chip protection circuit in display module of the embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give presently preferred embodiments of the present invention.But the present invention can be realized by different forms, however it is not limited to be retouched herein
The embodiment stated.Opposite, purpose of providing these embodiments is keeps the understanding to the disclosure more thorough complete
Face.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description specifically in the description of the invention herein
Embodiment purpose, it is not intended that in limitation the present invention.
In the following, referring to attached drawing, the present invention is described in detail.
Fig. 2 shows the structural schematic diagrams of display module a kind of in the embodiment of the present invention.
As shown in Fig. 2, display module includes display panel 100, gate driving circuit 110, source electrode in the embodiment of the present invention
Driving circuit 120, wiring board 200, electric power management circuit 310, level conversion unit 320 and chip protection circuit 400.Grid
Driving circuit 110 and source electrode drive circuit 120 are located at 100 periphery of display panel and are electrically connected with display panel 100, are respectively used to
Grid line scanning signal and data-signal are provided to display panel 100.(XON draws one functional pin of level conversion unit 320
Foot) it is connect with the electric power management circuit 310 being located on pcb board 300, and the grid on level conversion unit 320 and display panel
Driving circuit 110 connects.Level conversion unit 320 is used to receive the driving voltage of the transmission of electric power management circuit 310 and electric discharge is opened
Dynamic signal XON, and multiple gate drivings are generated according to driving voltage and channel data under the control of electric discharge enabling signal XON and are believed
Number, and it is conveyed to gate driving circuit 110.Electric power management circuit 310 passes through wiring board 200 to gate driving circuit 110 and source
Pole driving circuit 120 provides driving voltage (including positive voltage and negative voltage), and turns in display module switching on and shutting down to level
It changes unit 320 and electric discharge enabling signal is provided.
The XON functional pin of level conversion unit 320 connects in the first input end and display module of chip protection circuit 400
It connects, the second input terminal and third input terminal are then located at voltage (including the high level voltage of electric power management circuit 310 in display module
VGH and low level voltage VGL) on outgoing route.
It should be noted that level conversion unit 320 can be located in GOA of the embodiment of the present invention (or GIA) circuit design
On pcb board 300, it is electrically connected with gate driving circuit 110 by wiring board 200, as shown in Fig. 2 of the present invention.Level conversion list
Member 320 may be alternatively located on display panel 100 (non-attached drawing is shown), herein without limitation.
The chip protection circuit 400 can receive the electric discharge enabling signal XON in circuit, and can be in electric discharge enabling signal
The voltage output path of electric power management circuit 310 is disconnected when XON exception, it is injury-free with protection power source management circuit.
Fig. 3 shows the system block diagram of chip protection circuit in display module of the embodiment of the present invention.
As shown in figure 3, in the present embodiment, chip protection circuit includes detection module 410 and on-off circuit module 420,
The input terminal of detection module 410 and the XON functional pin of gate driving circuit connect, defeated to receive the enabling signal XON that discharges
Outlet is connect with the input terminal of on-off circuit module 420, to export high level or low level letter to on-off circuit module 420
Number, an input terminal of on-off circuit module 420 is connect with the output end of detection module 410, is used to according to the received high electricity of institute
Ordinary mail number or low level signal, another input terminal are then connect with the voltage output end of electric power management circuit in display module, switch
Detection module 420 can according to detection module it is fast 410 output voltage signal control electric power management circuit whether output voltage.
In the present embodiment, detection module 410 is used to judge the state of electric discharge enabling signal XON, and according to putting
The different conditions for electrically activating signal XON export corresponding high and low level, such as when the output of electric discharge enabling signal XON is continuously height
When level, detection module 410 exports high level；When electric discharge enabling signal XON output have within a certain period of time high level with it is low
When lasting variation between level, detection module 410 exports low level.
Optionally, in this embodiment, the high level of electric discharge enabling signal XON may be set to low level situation of change
There are 3 variations (by high level to low level, or by the variation of low level to high level), while the time in 8 milliseconds
Value and time numerical value also may be set to other numerical value.This setting can be adjusted according to actual applicable cases, without limitation.
On-off circuit module 420 receives the high level or low level signal that detection module 410 exports, while according to being connect
The level signal control internal switch pipe of receipts is turned on or off, so control electric power management circuit whether output voltage.Upper
It states in embodiment, it is preferred that when detection module 410 exports high level, it is defeated that on-off circuit module 420 controls electric power management circuit
Voltage (including high level voltage VGH and low level voltage VGL) out；When detection module 410 exports low level, switch electricity
Road module 420 controls electric power management circuit not output voltage (or high level voltage VGH and low level voltage VGL output is 0).
Fig. 4 shows the circuit structure diagram of chip protection circuit in first embodiment of the invention display module.
As shown in figure 4, in the first embodiment of the invention, detection module 410 be MCU (Microcontroller Unit,
Micro-control unit) chip, the XON pin of the first pin 1 (input terminal) connection gate driving circuit of MCU chip, third pin 3
(output end) is connect with the input terminal of on-off circuit module 420；The second pin 2 of MCU chip is connect with power end VDD simultaneously,
4th pin 4 is connect with ground terminal GND.
In this embodiment, on-off circuit module 420 includes two control paths, respectively to control power management electricity
The on/off of road high level voltage VGH output and low level voltage VGL output.Meanwhile first control path input terminal and second
The input terminal of control path is connected, and is the input terminal of on-off circuit module 420.
Specifically, the first control path includes: second switch Q2, the 4th switching tube Q4 and first resistor R1, and first
Resistance R1 and second switch Q2 is sequentially connected in series between the first control voltage input end VGH1 and ground terminal, and second switch
The grid of Q2 is connect with the output end of detection module 410, to receive the first voltage signal of the output of detection module 410；4th opens
The grid for closing pipe Q4 is connect with the drain of second switch Q2, and source electrode and drain electrode is separately connected the first control voltage input end
VGH1 and the first control of output voltage VGH, the first control voltage input end VGH1 are the second input of chip protection circuit 400
End.
Second control path includes: first switch tube Q1, third switching tube Q3, second resistance R2,3rd resistor R3, the 4th
Resistance R4, the 5th resistance R5 and adder AR, second resistance R2 and first switch tube Q1, which are sequentially connected in series, controls voltage in second
Between input terminal VGL1 and ground terminal, then it is connected with and adds between the grid of first switch tube Q1 and the output end of detection module 410
Musical instruments used in a Buddhist or Taoist mass AR；The grid of third switching tube Q3 is connect with the drain of first switch tube Q1, and source electrode and drain electrode is separately connected the second control
Voltage input end VGL1 processed and the second control of output voltage VGL, the second control voltage input end VGL1 is chip protection circuit
400 third input terminal；The grid of the first pin 1 (output pin) connection first switch tube Q1 of adder AR, second draws
Foot 2 is connect by 3rd resistor R3 with the output end of detection module 410, and third pin 3 is grounded by the 5th resistance R5, simultaneously
The 4th resistance R4 is also connected between the second pin 2 and the first pin 1 of adder AR.
Preferably, adder AR is single times of reverse phase adder, the first voltage mainly exported to receive detection module 410
Signal, and the second voltage signal with first voltage signal inversion is exported to the grid of first switch tube Q1.
Further, the first control voltage input end VGH1 corresponds to the high level voltage letter of electric power management circuit output
Number, the second control voltage input end VGL1 corresponds to the low level voltage signal of electric power management circuit output.
Preferably, first switch tube Q1 and the 4th switching tube Q4 is PMOS transistor, second switch Q2 and third switch
Pipe Q3 is NMOS transistor.
Optionally, in one embodiment of the invention, circuit structure corresponding to on-off circuit module 420 is integrated in core
The inside of piece.In other embodiments of the invention, circuit structure corresponding to on-off circuit module 420 the outside of chip into
Row is built.
Fig. 5 shows the circuit structure diagram of chip protection circuit in second embodiment of the invention display module.
As shown in figure 5, and combine Fig. 4, the difference of second embodiment of the invention and first embodiment is, real second
It applies in example, the second control path of on-off circuit module 420 includes: first switch tube Q1, third switching tube Q3, second resistance
R2,3rd resistor R3 and phase inverter, second resistance R2 and first switch tube Q1, which are sequentially connected in series, controls voltage input end in second
Between VGL1 and ground terminal, connected between the grid of first switch tube Q1 and the output end of detection module 410 by phase inverter；The
The grid of three switching tube Q3 is connect with the drain of first switch tube Q1, and drain electrode and source electrode are separately connected the second control voltage input
Hold VGL1 and the second control of output voltage VGL；The input terminal of phase inverter is connect with the output end of detection module 410, output end
It is connect with the grid of first switch tube Q1.Phase inverter is also the first voltage signal to receive the output of detection module 410, and to
The second voltage signal of the grid output and first voltage signal inversion of first switch tube Q1.
In this embodiment, the circuit structure of the first control path in detection module 410 and on-off circuit module 420 with
First embodiment is identical, can refer to Fig. 4 and is understood, is no longer described in detail herein.
Fig. 6 shows the work flow diagram of chip protection circuit in display module of the embodiment of the present invention.
As shown in fig. 6, in one embodiment of the present of invention, after integrated drive electronics powers in display module, mould
Electric power management circuit (chip) in group is started to work, and the XON pin of gate driving circuit receives an electric discharge enabling signal, knot
Fig. 3 is closed, in one embodiment of the present of invention, detection module 410 can be examined the electric discharge enabling signal at XON pin at this time
It surveys, judges it within a certain period of time and whether there is high/low level change.
When detecting that high/low level change (as output is continuously high level voltage) is not present in the electric discharge enabling signal,
Detection module 410 exports high level signal, and Simultaneous Switching circuit module 420 receives the high level signal that detection module 410 is sent,
And control the second switch Q2 in internal circuit in the first control path and the 4th switching tube Q4 conducting and its second control
First switch tube Q1 and third switching tube Q3 conducting on path, and then it is connected to the defeated of electric power management circuit (chip) control voltage
Outbound path, electric power management circuit (chip) work normally.
When detecting the electric discharge enabling signal there are when high/low level change, detection module 410 exports low level signal,
Simultaneous Switching circuit module 420 receives the low level signal that detection module 410 is sent, and controls the first control in internal circuit
Second switch Q2 and the 4th switching tube Q4 shutdown on path and first switch tube Q1 and third in its second control path
Switching tube Q3 shutdown, disconnects the outgoing route of electric power management circuit control voltage, and protection power source management circuit is not burned.
Further, the outgoing route of electric power management circuit control voltage includes positive voltage outgoing route and negative voltage output
Path.Meanwhile controlling voltage and including but be not limited to high level voltage VGH and low level voltage VGL, it can be according to practical application
It is adjusted, if positive voltage refers to VGH circuit, negative voltage refers to VGL circuit.
Chip protection circuit disclosed in present invention implementation is not limited in the use of electric power management circuit, to other
Driving chip carry out can refer to chip protection circuit in the embodiment of the present invention when chip protection.
It should be noted that herein, contained the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Finally, it should be noted that obviously, the above embodiment is merely an example for clearly illustrating the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the art, it can also do on the basis of the above description
Other various forms of variations or variation out.There is no necessity and possibility to exhaust all the enbodiments.And thus drawn
The obvious changes or variations that Shen goes out are still in the protection scope of this invention.
Claims (9)
1. a kind of display module, comprising:
Display panel；
Gate driving circuit, the gate driving circuit are electrically connected with the display panel, for providing to the display panel
Grid line scanning signal；
Source electrode drive circuit, the source electrode drive circuit are electrically connected with the display panel, for providing to the display panel
Data-signal；
Level conversion unit, the level conversion unit are connected with the gate driving circuit, for electric to the gate driving
Road provides multiple gate drive signals；And
Electric power management circuit, the electric power management circuit are electrically connected with the gate driving circuit and the source electrode drive circuit respectively
Connect, for providing driving voltage to the gate driving circuit and the source electrode drive circuit, and with the level conversion unit
Connection, for providing electric discharge enabling signal to the level conversion unit in the display module switching on and shutting down,
It is characterized by further comprising:
Chip protection circuit, the function that the first input end of the chip protection circuit connects the level conversion unit are drawn
Foot, the second input terminal and third input terminal respectively with the positive voltage output end of the electric power management circuit and negative voltage output end
Connection for receiving the electric discharge enabling signal, and is connected to or disconnects the power management electricity according to the electric discharge enabling signal
The voltage output path on road.
2. display module according to claim 1, which is characterized in that the chip protection circuit includes:
Detection module, the detection module receive electric discharge enabling signal, and when the electric discharge enabling signal is continuously high level
High level signal is exported, or defeated when thering is multiple high level to change in certain time with low level in the electric discharge enabling signal
Low level signal out, and
On-off circuit module, the on-off circuit module receive the high level signal of the detection module output, are connected to the electricity
The voltage output path of power management circuits；Or the low level signal of the detection module output is received, disconnect the power supply pipe
Manage the voltage output path of circuit.
3. display module according to claim 2, which is characterized in that the detection module is micro-control unit chip.
4. display module according to claim 2, which is characterized in that the on-off circuit module includes:
First control path, high level signal and low level of first control path to receive the detection module output
One of signal, at the same according to corresponding level signal be connected to or disconnect the electric power management circuit positive voltage export road
Diameter；
Second control path, high level signal and low level of second control path to receive the detection module output
One of signal, at the same according to corresponding level signal be connected to or disconnect the electric power management circuit negative voltage export road
Diameter.
5. display module according to claim 4, which is characterized in that first control path includes:
Second switch, the grid of the second switch are connect with the output end of the detection module, and drain electrode passes through first
The connection of the positive voltage output end of resistance and electric power management circuit and source electrode are connect with ground terminal, and
The grid of 4th switching tube, the 4th switching tube is grounded by the second switch, and source electrode and drain electrode connects respectively
Receive positive voltage signal and output positive voltage signal.
6. display module according to claim 4, which is characterized in that second control path includes:
The first input end of reverse phase adder, the reverse phase adder is connected by the output end of 3rd resistor and the detection module
It connects, the second input terminal is connected by the 5th resistance eutral grounding and output end and the grid of first switch tube；
One end of 4th resistance, the 4th resistance is connect with the first input end of the reverse phase adder, the other end with it is described
The output end of reverse phase adder connects；
First switch tube, the grid of the first switch tube are connect with the output end of the reverse phase adder, and drain electrode passes through the
The connection of the negative voltage output end of two resistance and electric power management circuit and source electrode are connect with ground terminal, and
The grid of third switching tube, the third switching tube is grounded by the first switch tube, and source electrode and drain electrode connects respectively
Receive negative voltage signal and output negative voltage signal.
7. display module according to claim 4, which is characterized in that second control path includes:
Phase inverter, the input terminal of the phase inverter are connect with the output end of the detection module, output end and first switch tube
Grid connection；
First switch tube, the grid of the first switch tube are connect with the output end of the phase inverter, and drain electrode passes through the second electricity
Resistance is connect with the negative voltage output end of electric power management circuit and source electrode is connect with ground terminal, and
The grid of third switching tube, the third switching tube is grounded by the first switch tube, and source electrode and drain electrode connects respectively
Receive negative voltage signal and output negative voltage signal.
8. gate driving circuit according to claim 5, which is characterized in that the second switch is NMOS transistor,
4th switching tube is PMOS transistor.
9. gate driving circuit according to claim 6 or 7, which is characterized in that the first switch tube is PMOS crystal
Pipe, the third switching tube are NMOS transistor.
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