CN107481693B - A kind of display driver circuit and its control method, display device - Google Patents
A kind of display driver circuit and its control method, display device Download PDFInfo
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- CN107481693B CN107481693B CN201710800726.7A CN201710800726A CN107481693B CN 107481693 B CN107481693 B CN 107481693B CN 201710800726 A CN201710800726 A CN 201710800726A CN 107481693 B CN107481693 B CN 107481693B
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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
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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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
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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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
- G09G3/3406—Control of illumination source
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- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the present invention provides a kind of display driver circuit and its control method, display device, is related to field of display technology, can be avoided the undesirable picture of display and is shown.The display driver circuit includes gate drivers, pulse width regulator, sequence controller and detecting signal unit；Detecting signal unit is for judging whether the first control signal that pulse width regulator is provided to gate drivers and the second control signal that sequence controller is provided to gate drivers are short-circuit；And when first control signal or the second control signal short circuit, to pulse width regulator, and/or, sequence controller exports feedback signal；The first enable signal that pulse width regulator is closed for based on the feedback signal, generating control backlight module；Sequence controller is for based on the feedback signal, generating the second enable signal for controlling the display panel display black picture.The display driver circuit is for driving display panel to be shown.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of display driver circuit and its control methods, display device.
Background technique
Display, such as (Thin Film Transistor Liquid Crystal Display, film are brilliant by TFT-LCD
Body pipe-liquid crystal display) it is used as a kind of panel display apparatus, because it is with small size, low power consumption, no radiation and cost of manufacture
The features such as relatively low, and be applied in high-performance display field more and more.
Grid line and data line that transverse and longitudinal is intersected are set in TFT-LCD, and the grid line and data line intersection define multiple in matrix
The sub-pix of form arrangement.TFT-LCD is during display, above-mentioned to gate line by line by being scanned line by line to grid line
Sub-pix.Then data voltage is exported to corresponding sub-pix by data line, to drive sub-pix to be shown.
However, in the prior art, when TFT-LCD during display by extraneous factor, such as noise influence when, meeting
Cause for short circuit to occur to the control signal for driving the driving circuit of above-mentioned grid line to provide, so that the control signal of display panel
It lacks, occurs so as to cause the gate drive signal that part grid line receives abnormal.So, during display,
By occurring, the display such as not working bright line or region is bad, so that user causes vision after seeing above-mentioned bad picture
Fatigue.
Summary of the invention
The embodiment of the present invention provides a kind of display driver circuit and its control method, display device, can be avoided display
Undesirable picture is shown.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
The one side of the embodiment of the present invention provides a kind of display driver circuit, including gate drivers, the display driving
Circuit further includes pulse width regulator, sequence controller and detecting signal unit；The detecting signal unit respectively with institute
Pulse width regulator is stated to be connected with the sequence controller；The detecting signal unit for judging that the pulse is wide respectively
The first control signal and the sequence controller that degree adjuster is provided to the gate drivers are mentioned to the gate drivers
Whether the second control signal of confession is short-circuit；And it is described when the first control signal or the second control signal short circuit
Detecting signal unit is also used to the pulse width regulator, and/or, the sequence controller exports feedback signal；It is described
Pulse width regulator is used to generate the first enable signal that control backlight module is closed according to the feedback signal；When described
Sequence controller is used to generate the second enable signal for controlling the display panel display black picture according to the feedback signal.
Preferably, the detecting signal unit includes logic judgment module, the first NOT gate, the second NOT gate and or door；Institute
The input terminal for stating logic judgment module is connected with the pulse width regulator and the sequence controller respectively；The logic
Judgment module is used to judge whether the first control signal of pulse width regulator output to be short-circuit, and by judging result
It is exported by the first output end of the logic judgment module；And/or the logic judgment module is for judging the timing control
Whether the second control signal of device output processed is short-circuit, and the second output that judging result is passed through the logic judgment module
End output；First output end of the logic judgment module connects the first NOT gate input terminal, described in second output terminal connection
The input terminal of second NOT gate；The output end of first NOT gate is connected with described or door first input end, and described second is non-
The output end of door is connected with described or door the second input terminal；Described or door output end respectively with the pulse width modulation
Device is connected with the sequence controller.
Preferably, the display driver circuit further includes electric pressure converter；The electric pressure converter and the pulse width
Adjuster is connected with the sequence controller；The electric pressure converter is used for described in pulse width regulator output
First control signal and the second control signal of sequence controller output carry out voltage conversion, and export to the grid
Driver.
It is further preferred that the detecting signal unit is integrated in the electric pressure converter.
Preferably, the display driver circuit further includes the source electrode driver being connected with the sequence controller；It is described
Source electrode driver is used for the second enable signal for export according to the sequence controller, and exporting to each sub-pix second makes with this
The data voltage that energy signal matches.
The another aspect of the embodiment of the present invention, providing a kind of display device includes any one display driving as described above
Circuit.
Preferably, the display device further includes backlight module, in the backlight module and the display driver circuit
Pulse width regulator is connected.
The embodiment of the present invention provides a kind of side for being controlled any one display driver circuit as described above
Method, which comprises detecting signal unit judges the first control signal that pulse width regulator is provided to gate drivers
It is whether short-circuit；The detecting signal unit judges whether is second control signal that sequence controller is provided to the gate drivers
Short circuit；When the first control signal or the second control signal short circuit, the detecting signal unit is wide to the pulse
Spend adjuster, and/or, pulse width regulator described in sequence controller output feedback signal according to the feedback signal,
Generate the first enable signal that control backlight module is closed；It is aobvious to generate control according to the feedback signal for the sequence controller
Show the second enable signal of Display panel black picture.
Preferably, when the detecting signal unit includes logic judgment module, the detecting signal unit is to the arteries and veins
Width adjustor is rushed, and/or, the sequence controller output feedback signal includes: that the logic judgment module judges the arteries and veins
Whether the first control signal for rushing width adjustor output is short-circuit, and judging result is passed through the logic judgment module
The output of first output end；And/or the logic judgment module judges the second control signal of the sequence controller output
Whether short circuit is judged, and judging result is exported by the second output terminal of the logic judgment module.
Preferably, when the display driver circuit further includes electric pressure converter, the method also includes: electric pressure converter
Second control of the first control signal and sequence controller output to pulse width regulator output
Signal carries out voltage conversion, and will export to the gate drivers.
The embodiment of the present invention provides a kind of display driver circuit and its control method, display device.This is aobvious from the above
Show that detecting signal unit can judge the first control that pulse width regulator is provided to gate drivers respectively in driving circuit
Whether the second control signal that signal and sequence controller are provided to gate drivers is short-circuit, when first control signal or described
When two control signal shorts, detecting signal unit is also used to pulse width regulator and sequence controller output feedback signal.
In the case, after pulse width regulator receives above-mentioned feedback signal, control can be generated according to the feedback signal
The first enable signal that backlight module is closed.In addition, after sequence controller receives above-mentioned feedback signal, according to above-mentioned anti-
Feedback signal generates the second enable signal for controlling the display panel display black picture.In the case, even if above-mentioned first control
Short circuit occurs for any one control signal in signal, second control signal, due to showing under the control of the first enable signal
Panel meeting blackening, and/or, make display panel show black picture under the control of the second enable signal, therefore due to the short circuit
Caused picture bad phenomenon will not be observed by user, so as to avoid the bad picture from causing asking for user's visual fatigue
Topic.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of display device provided in an embodiment of the present invention；
Fig. 2 is the concrete structure schematic diagram of gate drivers in Fig. 1；
Fig. 3 is the structural schematic diagram of another display device provided in an embodiment of the present invention；
Fig. 4 is the concrete structure schematic diagram of detecting signal unit in Fig. 1 or Fig. 3；
Fig. 5 is a kind of control method flow chart of display driver circuit provided in an embodiment of the present invention.
Appended drawing reference:
01- display driver circuit；02- display panel；03- backlight module；10- pulse width regulator；20- timing control
Device；30- electric pressure converter；301- detecting signal unit；311- logic judgment module；The first NOT gate of 321-；The second NOT gate of 331-；
341- or door；40- gate drivers；50- source electrode driver.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of display driver circuit 01, as shown in Figure 1, including pulse width regulator (Pulse
Width Modulation, PWM) 10, sequence controller (Timer Control, TCON) 20, detecting signal unit 301 and
Gate drivers (Gate on Array, GOA) 40.
Wherein, pulse width regulator 10 is used to provide first control signal to gate drivers 40.For example, first control
Signal processed can be for the supply voltage VGH and VGL of the output of the form of analog signal (Analog Signal).
In addition, the sequence controller 20 is used to provide second control signal to gate drivers 40.For example, second control
Signal can for the initial signal STV (Start Vertical) that is exported in the form of digital signal (Digital Signal) with
And clock signal clk.
Based on this, since sequence controller 20 and pulse width regulator 10 state the offer of gate drivers 40 directly up
The amplitude of signal is too small, drives insufficient for gate drivers 40 to the grid line on display panel 02.Therefore it needs
Voltage is set between sequence controller 20 and gate drivers 40 and between pulse width regulator 10 and gate drivers 40
Converter (Level Shift) 30.
In the case, electric pressure converter 30 is connected with pulse width regulator 10.Electric pressure converter 30 is used for arteries and veins
The above-mentioned first control signal of the output of width adjustor 10 is rushed, i.e., above-mentioned VGH, VGL are converted, and the signal of amplitude raising is obtained
VGH ', VGL ', and export to gate drivers 40.
In addition, the electric pressure converter 30 is also connected with sequence controller 20.The electric pressure converter 30 is also used to timing
The above-mentioned second control signal that controller 20 exports, i.e., above-mentioned STV, CLK carry out voltage conversion, obtain the signal of amplitude raising
STV ', CLK ', and export to gate drivers 40.
Hereinafter, with the above-mentioned first control signal that electric pressure converter 30 exports above-mentioned pulse width regulator 10, i.e., on
It states for VGH, VGL converted, the conversion process of the electric pressure converter 30 is illustrated.Specifically, pulse width modulation
In the above-mentioned first control signal that device 10 exports, VGH is usually 3.3V, and VGL is usually 0V.In the case, pass through voltage
After converter 30 converts above-mentioned first control signal, obtained signal VGH ' is about 30V, and VGL ' is about -6V.In this way
One, the amplitude for being input to the control signal of gate drivers 40 can be increased, so that the grid of the gate drivers 40 output
Driving signal can gate grid line.
Based on this, as shown in Fig. 2, above-mentioned gate drivers 40 include multiple cascade shift register cells (RS1,
RS2……RSn)。
Wherein, electric pressure converter 30 to every level-one shift register cell provide signal VGH ' after overvoltage is converted,
VGL ' and CLK '.So that every level-one shift register cell is by respective signal output end OUT, to coupled
Grid line (G1, G2 ... or Gn) export gated sweep signal.
In addition, electric pressure converter 30 is provided to the signal input part INPUT of first order shift register cell RS1 by electricity
Signal STV ' after pressure conversion.After signal STV ' exports initial signal, above-mentioned gate drivers 40 are started to work.
On this basis, above-mentioned detecting signal unit 301 for judging pulse width regulator 10 to gate driving respectively
The second control signal that the first control signal (VGH, VGL) and sequence controller 20 that device 40 provides are provided to gate drivers 40
Whether (STV, CLK) be short-circuit.
In the case, when first control signal or the second control signal short circuit, detecting signal unit 301 is also used
In to pulse width regulator 10 export feedback signal FB；Alternatively, the detecting signal unit 301 is also used to sequence controller 20
Export feedback signal FB；Or detecting signal unit 301 be also used to it is defeated to pulse width regulator 10 and sequence controller 20
Feedback signal FB out.
It should be noted that first control signal short circuit (Short) refers to that VGH, VGL in first control signal are mutual
Short circuit or respectively with ground connection terminal shortcircuit.It specifically includes: VGH and VGL Short；VGH and GND Short；VGL and GND
Short。
Alternatively, above-mentioned second control signal short circuit refers to that STV, CLK in second control signal are short with ground terminal respectively
Road.It specifically includes: STV and GND Short；CLK and GND Short.
Based on this.After pulse width regulator 10 receives above-mentioned feedback signal FB, which is used
According to feedback signal FB, the first enable signal that control backlight module (Backlight Module, BLM) 03 is closed is generated
CN1。
Specifically, specific pin (PIN) can be arranged in pulse width regulator 10 to be made for sending above-mentioned first
It can signal CN1.In the case, after backlight module 03 receives above-mentioned first enable signal CN1, it can control the backlight mould
Light source in group 03 is in close state, and stops shining.Display panel 02 is not due to having backlight and blackening at this time.
And/or after sequence controller 20 receives above-mentioned feedback signal FB, which is used for according to above-mentioned
Feedback signal FB generates the second enable signal CN2 for controlling the display panel 02 display black picture.Display panel 02 is shown at this time
Black picture.
In the case, even if appointing in above-mentioned first control signal (VGH, VGL), second control signal (STV, CLK)
It anticipates one and controls signal generation short circuit, due to the meeting of display panel 02 blackening under the control of the first enable signal CN1, and/or,
Second enable signal CN2 control is lower so that display panel 02 shows black picture, therefore the picture as caused by the short circuit is bad
Phenomenon will not be observed by user, so as to avoid the problem that the bad picture causes user's visual fatigue.
On this basis, in order to reduce the area that above-mentioned detecting signal unit 301 occupies wiring area, it is preferred that such as Fig. 3
Shown, which can integrate in electric pressure converter 30.
Hereinafter, the structure of above-mentioned detecting signal unit 301 is described in detail.Specifically, as shown in figure 4, above-mentioned
Detecting signal unit 301 includes logic judgment module 311, the first NOT gate 321, the second NOT gate 331 and or door 341.
Specifically, the input terminal of logic judgment module 311 respectively with above-mentioned pulse width regulator 10 and sequence controller
20 are connected, so that the logic judgment module 311 can receive the first control letter of the output of pulse width regulator 10
Number (VGH, VGL), and receive the second control signal (STV, CLK) of the output of sequence controller 20.
In the case, which is used to judge above-mentioned first control that pulse width regulator 10 exports
Whether signal (VGH, VGL) processed is short-circuit, and judging result is exported by the first output terminals A of the logic judgment module 311.
And/or the logic judgment module 311 is used to judge the above-mentioned second control signal that sequence controller 20 exports
Whether (STV, CLK) be short-circuit, and judging result is exported by the second output terminal B of the logic judgment module 311.
It can be seen from the above, first control signal (VGH, VGL) is analog signal, and second control signal (STV, CLK) number
Word signal.Therefore above-mentioned logic judgment module 311 can the short-circuit state respectively to analog signal and digital signal judge,
And judging result is exported by different output terminals As or B.
On this basis, the first output terminals A connection 321 input terminal of the first NOT gate of above-mentioned logic judgment module 311, second
The input terminal of the second NAND gate of output end B connection 331.
In addition, the output end of the first NOT gate 321 is connected with above-mentioned or door 341 first input end, the second NOT gate 331
Output end is connected with the second input terminal of this or door 341.Also, should or door 341 output end respectively with pulse width modulation
Device 10 is connected with sequence controller 20.
In the case, by above-mentioned first NOT gate 321, the second NOT gate 331 and or constitute non-of door 341 plus or door it is true
It is as shown in table 1 to be worth table.
Table 1
| Signal condition | A | B | C | D | E |
| VGH and VGL Short | 0 | 0/1 | 1 | 1 | 1 |
| VGH and GND Short | 0 | 0/1 | 1 | 1 | 1 |
| CLK and GND Short | 0/1 | 0 | 1 | 1 | 1 |
| STV and GND Short | 0/1 | 0 | 1 | 1 | 1 |
| VGL and GND Short | 0 | 0/1 | 1 | 1 | 1 |
| Without short circuit | 1 | 1 | 0 | 0 | 0 |
Wherein, when the first output terminals A of logic judgment module 311 exports " 0 ", expression is input to this in the form of analog voltage
There are short-circuit conditions described in table 1, such as VGH for signal in the first control signal (VGH, VGL) of logic judgment module 311
With VGL Short, VGH and GND Short or VGL and GND Short.And work as the first output terminals A of logic judgment module 311
When exporting " 1 ", any one signal being input in the first control signal (VGH, VGL) of the logic judgment module 311 is indicated
Short circuit does not occur.
In addition, expression is input to this in the form of digital voltage when the second output terminal B of logic judgment module 311 exports " 0 "
There are short-circuit conditions described in table 1, such as CLK for signal in the second control signal (STV, CLK) of logic judgment module 311
With GND Short or STV and GND Short.And when the second output terminal B of logic judgment module 311 exports " 1 ", it indicates
Short circuit does not occur for any one signal being input in the second control signal (STV, CLK) of the logic judgment module 311.
Specifically, being illustrated by taking VGH and VGL Short as an example to above-mentioned table 1, when signal VGH and signal VGL generation is short
Lu Shi has above-mentioned the first output terminals A output " 0 " for knowing logic judgment module 311.In the case, no matter the second control is believed
Signal in number (STV, CLK) is with the presence or absence of short circuit, i.e. the second output terminal B output " 0 " of the logic judgment module 311 or defeated
" 1 " out, by it is above-mentioned it is non-plus behind the door or the output end C of door 341 output feedback signal FB be " 1 ".
In the case, the input terminal D of pulse width regulator 10 receives the above-mentioned feedback signal FB for " 1 ", according to
Feedback signal FB generates the first enable signal CN1, and exports to backlight module 03, so that backlight module 03 is by it internal
Light source shutdown.
And/or the input terminal E of sequence controller 20 receives the above-mentioned feedback signal FB for " 1 ", according to the feedback signal
FB generates the second enable signal CN2.
In the case, when above-mentioned display driver circuit 01, as shown in figure 3 or 4, further include and 20 phase of sequence controller
When the source electrode driver 50 of connection.The source electrode driver 50 can receive above-mentioned second enable signal CN2, and according to this second
Enable signal CN2, the data voltage to match to the output of each sub-pix with second enable signal CN2.Specifically, due to
Two enable signal CN2 can control the display panel 02 display black picture.Therefore, above-mentioned source electrode driver 50 receive this second
The data voltage Vdata that can be matched to the output of each sub-pix with grayscale value L0 after enable signal CN2.
The embodiment of the present invention provides a kind of display device, including any one display driver circuit 01 as described above.It should
Display device has beneficial effect identical with the display driver circuit 01 that previous embodiment provides, and details are not described herein again.
It should be noted that in embodiments of the present invention, above-mentioned display device can specifically include liquid crystal display device, example
Such as display device can be display, TV, Digital Frame, mobile phone or any product having a display function of tablet computer
Or component.
On this basis, as shown in Figure 1, the display device further includes backlight module 03, the backlight module 03 and display are driven
Pulse width regulator 10 in dynamic circuit 01 is connected.In the case, which can be to backlight mould
The light emission luminance of group 03 is adjusted.In addition, when pulse width regulator 10 receives the feedback of the output of detecting signal unit 301
When signal FB, which can also be provided for turn off the back to backlight module 03 by specific pin
First enable signal CN1 of light source in optical mode group 03.
The embodiment of the present invention provides a kind of for being controlled any one as described above display driver circuit 01
Method, as shown in figure 5, the above method includes:
S101, as shown in Figure 1, detecting signal unit 301 judges that pulse width regulator 10 is mentioned to gate drivers 40
Whether the first control signal (VGH, VGL) of confession is short-circuit.
S102, above-mentioned detecting signal unit 301 judge the second control that sequence controller 20 is provided to gate drivers 40
Whether signal (STV, CLK) is short-circuit.
It should be noted that the present invention to the sequencing of above-mentioned steps S101 and step S102 without limitation.Preferably,
When the signal for the first control signal (VGH, VGL) and second control signal (STV, CLK) for being input to the detecting signal unit 301
When transmission speed is suitable, above-mentioned steps S101 and step S102 can be carried out simultaneously.
S103, when above-mentioned first control signal (VGH, VGL) or second control signal (STV, CLK) are short-circuit, the signal
Detection unit 301 exports feedback signal FB to pulse width regulator 10；
Alternatively, when above-mentioned first control signal (VGH, VGL) or short-circuit second control signal (STV, CLK), signal inspection
It surveys unit 301 and exports above-mentioned feedback signal FB to sequence controller 20；
Or when above-mentioned first control signal (VGH, VGL) or short-circuit second control signal (STV, CLK), signal
Detection unit 301 exports above-mentioned feedback signal FB to pulse width regulator 10 and sequence controller 20.
S104, when the pulse width regulator 10 receives above-mentioned feedback signal FB, the pulse width regulator 10
According to feedback signal FB, the first enable signal CN1 that control backlight module 03 is closed is generated.
S105, when the sequence controller 20 receives above-mentioned feedback signal FB, the sequence controller 20 is according to feedback letter
Number FB generates the second enable signal CN2 for controlling the display panel 02 display black picture.
It should be noted that when pulse width regulator 10 and sequence controller 20 receive above-mentioned feedback signal FB
When, the present invention to the sequencing of above-mentioned steps S104 and step S105 without limitation.Preferably, when being input to pulse width tune
When section device 10 is suitable with the signaling rate of feedback signal FB of sequence controller 20, above-mentioned steps S104 and step S105 can
To carry out simultaneously.
On this basis, when detecting signal unit 301 includes as shown in Figure 4 logic judgment module 311, the signal detection
Unit 301 to pulse width regulator 10, and/or, sequence controller 20 export feedback signal FB include:
Whether the first control signal (VGH, VGL) that logic judgment module 311 judges that pulse width regulator 10 exports is short
Road, and judging result is exported by the first output terminals A of logic judgment module 311.
Wherein, logic judgment module 311 to first control signal (VGH, VGL) whether Duan Lu deterministic process institute as above
It states, details are not described herein again.
And/or logic judgment module 311 judge sequence controller 20 export second control signal (STV, CLK) whether
Short circuit is judged, and judging result is exported by the second output terminal B of the logic judgment module 311.
Wherein, logic judgment module 311 to second control signal (STV, CLK) whether Duan Lu deterministic process institute as above
It states, details are not described herein again.
On this basis, above-mentioned as such as Fig. 1 of display driver circuit 01 or as shown in figure 3, when further including electric pressure converter 30
Method further include:
The first control signal (VGH, VGL) of 30 pulse-width adjuster 10 of electric pressure converter output is turned
It changes, obtains signal VGH ', the VGL ' of amplitude raising, and export to gate drivers 40.
Electric pressure converter 30 also carries out voltage conversion to the second control signal (STV, CLK) that sequence controller 20 exports,
Signal STV ', the CLK ' of amplitude raising are obtained, and is exported to gate drivers 40.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of display driver circuit, including gate drivers, which is characterized in that the display driver circuit further includes that pulse is wide
Spend adjuster, sequence controller and detecting signal unit；
The detecting signal unit is connected with the pulse width regulator and the sequence controller respectively；
The detecting signal unit for judging the pulse width regulator is provided to the gate drivers first respectively
Whether the second control signal that control signal and the sequence controller are provided to the gate drivers is short-circuit；And when described
When first control signal or the second control signal short circuit, the detecting signal unit is also used to the pulse width modulation
Device, and/or, the sequence controller exports feedback signal；
The pulse width regulator is used to generate the control backlight module is closed first enabled letter according to the feedback signal
Number；
The sequence controller is used for according to the feedback signal, and generation, which controls the display panel, shows that the second of black picture enables
Signal.
2. display driver circuit according to claim 1, which is characterized in that the detecting signal unit includes logic judgment
Module, the first NOT gate, the second NOT gate and or door；
The input terminal of the logic judgment module is connected with the pulse width regulator and the sequence controller respectively；Institute
It whether short-circuit states the first control signal of the logic judgment module for judging the pulse width regulator output, and will sentence
Disconnected result is exported by the first output end of the logic judgment module；And/or the logic judgment module is described for judging
The second control signal of sequence controller output whether short-circuit, and that judging result is passed through into the logic judgment module the
The output of two output ends；
First output end of the logic judgment module connects the first NOT gate input terminal, second output terminal connection described second
The input terminal of NOT gate；
The output end of first NOT gate is connected with described or door first input end, the output end of second NOT gate and institute
It states or the second input terminal of door is connected；Described or door output end respectively with the pulse width regulator and the timing control
Device processed is connected.
3. display driver circuit according to claim 1 or 2, which is characterized in that the display driver circuit further includes electricity
Pressure converter；
The electric pressure converter is connected with the pulse width regulator and the sequence controller；The electric pressure converter is used
In second control that the first control signal exported to the pulse width regulator and the sequence controller export
Signal processed carries out voltage conversion, and exports to the gate drivers.
4. display driver circuit according to claim 3, which is characterized in that the detecting signal unit is integrated in the electricity
In pressure converter.
5. display driver circuit according to claim 1, which is characterized in that the display driver circuit further include with it is described
The source electrode driver that sequence controller is connected；The source electrode driver according to second that the sequence controller exports for making
Energy signal, the data voltage to match to the output of each sub-pix with second enable signal.
6. a kind of display device, which is characterized in that including display driver circuit as described in any one in claim 1-5.
7. display device according to claim 6, which is characterized in that the display device further includes backlight module, described
Backlight module is connected with the pulse width regulator in the display driver circuit.
8. a kind of method for being controlled display driver circuit as described in any one in claim 1-5, feature exist
In, which comprises
Whether the first control signal that detecting signal unit judges that pulse width regulator is provided to gate drivers is short-circuit；
Whether the second control signal that the detecting signal unit judges that sequence controller is provided to the gate drivers is short-circuit；
When the first control signal or the second control signal short circuit, the detecting signal unit is to the pulse width
Adjuster, and/or, the sequence controller exports feedback signal；
The pulse width regulator generates the first enable signal that control backlight module is closed according to the feedback signal；
The sequence controller generates the second enabled letter for controlling the display panel display black picture according to the feedback signal
Number.
9. according to the method described in claim 8, it is characterized in that, when the detecting signal unit includes logic judgment module
When, the detecting signal unit to the pulse width regulator, and/or, sequence controller output feedback signal includes:
The logic judgment module judges whether the first control signal of the pulse width regulator output is short-circuit, and will
Judging result is exported by the first output end of the logic judgment module；
And/or the logic judgment module judge sequence controller output the second control signal whether short circuit into
Row judgement, and judging result is exported by the second output terminal of the logic judgment module.
10. according to the method described in claim 8, it is characterized in that, when the display driver circuit further includes electric pressure converter
When, the method also includes:
The first control signal and sequence controller output that electric pressure converter exports the pulse width regulator
The second control signal carry out voltage conversion, and will output to the gate drivers.
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| CN201710800726.7A CN107481693B (en) | 2017-09-06 | 2017-09-06 | A kind of display driver circuit and its control method, display device |
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| CN108597464B (en) * | 2018-03-26 | 2021-08-06 | 昆山龙腾光电股份有限公司 | Control device and control method for liquid crystal display |
| CN111341243B (en) * | 2020-04-10 | 2021-08-24 | Tcl华星光电技术有限公司 | Display device |
| CN111540296B (en) * | 2020-05-18 | 2023-01-10 | Tcl华星光电技术有限公司 | Time schedule controller and display device |
| CN112017579B (en) * | 2020-09-02 | 2021-11-02 | Tcl华星光电技术有限公司 | Display device and driving system thereof |
| CN112526395B (en) * | 2020-11-30 | 2023-11-17 | 科大讯飞股份有限公司 | Vehicle-mounted display screen signal transmission detection device, method and system |
| CN115497430B (en) * | 2022-10-19 | 2023-11-24 | 北京京东方显示技术有限公司 | Control circuit and control method of display panel and display device |
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