CN110085188A - The level converter and its control method and display panel of display panel - Google Patents
The level converter and its control method and display panel of display panel Download PDFInfo
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- CN110085188A CN110085188A CN201910368633.0A CN201910368633A CN110085188A CN 110085188 A CN110085188 A CN 110085188A CN 201910368633 A CN201910368633 A CN 201910368633A CN 110085188 A CN110085188 A CN 110085188A
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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
- G09G3/3696—Generation of voltages supplied to electrode drivers
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The present invention proposes the level converter and its control method and display panel of a kind of display panel, wherein, device includes: multiple level switch modules, wherein, each level switch module includes: level translator, the input terminal of level translator is electrically connected with signal output end corresponding in timing controller, and when the power end of level translator connects the first power supply, level translator, which receives the signal to be converted of corresponding signal output end output and treats conversion signal, carries out conversion amplification；And control circuit, the power end and the first power supply of control circuit and level translator are electrically connected, the power end that control circuit is used to control level translator when signal is completed in the resetting for getting timing controller connects the first power supply.Can avoid before timing controller resets and completes as a result, the phenomenon that being drawn high simultaneously because of multiple signals to be converted caused by GPO mouthful of unstable states, avoid the occurrence of because PMIC take out carry protection caused by booting blank screen bad phenomenon.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of level converter of display panel, a kind of display surfaces
Plate and a kind of control method of the level converter of display panel.
Background technique
Display panel can be visibly displayed the output device of electronic information as one kind, be widely used in such as family
The various occasions such as front yard, workplace.Display panel in the related technology will appear booting blank screen phenomenon once in a while, still, related skill
Art does not provide effective means and solves the problems, such as booting blank screen.
Summary of the invention
Present inventor it has been investigated that: timing controller complete program downloading before, some GPO
(General-purpose output, universal output) mouth is unknown state, i.e. GPO mouthfuls is possible to output high level, is also had
Low level may be exported.When there are several signals simultaneously is high level, pumping can be can be carried out after level translator amplifies and carried, caused
PMIC (Power Management IC, power management integrated circuit) is protected, to the bad existing of blank screen that be switched on occur
As.
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the first purpose of this invention is to propose a kind of level converter of display panel, to avoid appearance
The bad phenomenon of booting blank screen.
Second object of the present invention is to propose a kind of display panel.
Third object of the present invention is to propose a kind of control method of the level converter of display panel.
In order to achieve the above object, first aspect present invention embodiment proposes a kind of level converter of display panel, packet
Include: multiple level switch modules, the multiple level switch module respectively in the display panel timing controller it is more
A signal output end electrical connection, wherein each level switch module includes: level translator, the level translator
Input terminal is electrically connected with signal output end corresponding in the timing controller, is connected in the power end of the level translator
When the first power supply, the level translator receives the signal to be converted of corresponding signal output end output and to the letter to be converted
Number carry out conversion amplification；And control circuit, the power end and the first power supply point of the control circuit and the level translator
It is not electrically connected, the control circuit is used to control the electricity when signal is completed in the resetting for getting the timing controller
The power end of flat turn parallel operation connects first power supply.
The level converter of the display panel proposed according to embodiments of the present invention, control circuit are getting timing control
When signal is completed in the resetting of chip, the power end for controlling level translator connects the first power supply, thus, level translator receives phase
The signal to be converted for the signal output end output answered simultaneously treats conversion signal and carries out conversion amplification.The embodiment of the present invention as a result,
Caused by the level converter of display panel can prevent timing controller resetting from completing the preceding unstable state because of GPO mouthfuls
The phenomenon that multiple signals to be converted are drawn high simultaneously appearance, and then can avoid occurring smoking the blank screen that is switched on caused by carrying protection because of PMIC
Bad phenomenon.
According to one embodiment of present invention, the control circuit and the reset signal end of the timing controller are electrically connected
It connects, and when voltage of the reset signal at the reset signal end reaches reference voltage generates the resetting and completes signal, wherein
The reference voltage is reset signal voltage achieved when the timing controller resets completion.According to the present invention
One embodiment, the control circuit includes: controllable switch, and the first end of the controllable switch is electrically connected with first power supply
It connects, the second end of the controllable switch is electrically connected with the power end of the level translator；Compare sub-circuit, the sub- electricity of comparison
The output end on road is electrically connected with the control terminal of the controllable switch, the relatively first input end of sub-circuit and the timing control
The reset signal end of coremaking piece is electrically connected, to receive the reset signal of the timing controller, the of the relatively sub-circuit
Two input terminals are used for voltage and the reference to the reset signal for receiving the reference voltage, the relatively sub-circuit
Voltage is compared, and the controllable switch conducting is controlled when the voltage of the reset signal reaches the reference voltage.
According to one embodiment of present invention, it is described relatively sub-circuit include: comparator, the output end of the comparator with
The control terminal of the controllable switch is electrically connected；First resistor and second resistance, one end of the first resistor and the comparator
Positive input terminal electrical connection, the other end of the first resistor is electrically connected with one end of the second resistance, the first resistor
The other end be used to receive the reset signal of the timing controller, the other end ground connection of the second resistance；3rd resistor
With the 4th resistance, one end of the 3rd resistor is electrically connected with one end of the 4th resistance, and one end of the 3rd resistor is also
It is electrically connected with the negative input end of the comparator, the other end of the 3rd resistor is electrically connected with reference voltage setting end, described
The other end of 4th resistance is grounded.
According to one embodiment of present invention, the second resistance is one, wherein the multiple level switch module is equal
It is electrically connected with one end of the second resistance, the other end ground connection of the second resistance.
In order to achieve the above object, second aspect of the present invention embodiment proposes a kind of display panel, including first party of the present invention
The level converter of display panel described in the embodiment of face.
The display panel proposed according to embodiments of the present invention can by the level converter of the display panel of setting
It prevents before timing controller resets completion, multiple signals to be converted as caused by GPO mouthfuls of unstable states are drawn simultaneously
High phenomenon occurs, and then can avoid the bad phenomenon for booting blank screen occur.
According to one embodiment of present invention, the level converter is electrically connected with the timing controller, described
Level converter is also electrically connected with gate driving circuit.
In order to achieve the above object, third aspect present invention embodiment proposes a kind of control of the level converter of display panel
Method processed, the level converter include multiple level switch modules, and the multiple level switch module is shown with described respectively
Show multiple signal output ends electrical connection of timing controller in panel, each level switch module includes level conversion
Device, the input terminal of the level translator is electrically connected with signal output end corresponding in the timing controller, in the electricity
When the power end of flat turn parallel operation connects the first power supply, the level translator receives the to be converted of corresponding signal output end output
Signal simultaneously carries out conversion amplification to the signal to be converted, which comprises the resetting for obtaining the timing controller is complete
At signal；The power end for controlling the level translator connects first power supply.
The control method of the level converter of the display panel proposed according to embodiments of the present invention is getting timing control
When signal is completed in the resetting of coremaking piece, the power end for controlling level translator connects the first power supply.The embodiment of the present invention as a result,
The control method of the level converter of display panel can prevent before timing controller resets completion, due to GPO mouthfuls
The phenomenon that multiple signals to be converted caused by unstable state are drawn high simultaneously appearance, and then can avoid the bad of booting blank screen occur
Phenomenon.
According to one embodiment of present invention, it includes: to connect that signal is completed in the resetting for obtaining the timing controller
Receive the reset signal at the reset signal end of the timing controller；Reach in the voltage of the reset signal at the reset signal end
When reference voltage, generates the resetting and complete signal；Wherein, the reference voltage is the reset signal in the timing control
Chip resetting voltage achieved when completing.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the block diagram according to the level converter of the display panel of the embodiment of the present invention；
Fig. 2 is the unusual waveforms schematic diagram of the level converter of display panel in the related technology；
Fig. 3 is the block diagram according to the level converter of the display panel of one embodiment of the invention；
Fig. 4 is the circuit diagram according to the level converter of the display panel of one embodiment of the invention；
Fig. 5 is the waveform diagram according to the level converter of the display panel of one embodiment of the invention；
Fig. 6 is the block diagram according to the level converter of the display panel of another embodiment of the present invention；
Fig. 7 is the flow diagram according to the control method of the level converter of the display panel of the embodiment of the present invention；
Fig. 8 is to be illustrated according to the process of the control method of the level converter of the display panel of one embodiment of the invention
Figure.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below in the level converter and its control method of the display panel that the embodiment of the present invention is described with reference to the drawings and
Before display panel, the level converter of display panel in the related technology is introduced referring initially to attached drawing 2.
In the related technology, display panel will appear booting blank screen phenomenon once in a while.Present inventor it has been investigated that:
Before timing controller completes program downloading, i.e., before timing controller resetting is completed, some GPO mouthfuls are unknown state, are had
High level may be exported, it is also possible to export low level.When there is the signal of several GPO mouthfuls of outputs to be high level simultaneously, through electricity
Pumping can be can be carried out after the conversion amplification of flat turn parallel operation to carry, PMIC is caused to be protected, so as to cause there is the bad existing of booting blank screen
As.
Specifically, as shown in Figure 2, wherein VGH1 ' is the electricity for the second source that the power end of level translator is electrically connected
Pressure, CLKX_T ' are the signal to be converted of timing controller output, and CLKX_L ' is the signal after level translator is converted.
Wherein, when the voltage VGH1 ' of second source reaches critical value k ' such as 15V, level translator just believes front end
The signal to be converted of number i.e. timing controller output carries out conversion amplification, that is to say, that when the voltage VGH1 ' of second source is big
In or be equal to critical value k ', i.e. when VGH1 ' >=k ', it is defeated that level translator can carry out conversion amplification to the front end signal received
Out.
As shown in Fig. 2, being the electricity of second source in figure in 101 ' periods before the downloading of timing controller program is completed
Pressure VGH1 ' reaches critical value k ', then reaching critical value k ' to timing controller program in the voltage VGH1 ' of second source
Downloading was completed in this period, i.e., the 102 ' periods in figure, the letter to be converted that level translator can export timing controller
Number CLKX_T ' i.e. high level carries out conversion amplification output, obtains converting amplified signal CLKX_L ' through level translator, i.e.,
Unusual waveforms shown in 103 ' in figure, are protected so as to cause PMIC, the bad phenomenon of booting blank screen occur.
Based on this, the present invention proposes the level converter and its control method and display panel of a kind of display panel.
Below with reference to the accompanying drawings the level converter of the display panel of the embodiment of the present application is described in detail.
Fig. 1 is the block diagram according to the level converter of the display panel of the embodiment of the present invention.As shown in Figure 1,
The level converter 1 of the display panel of the embodiment of the present invention includes multiple level switch modules 100, multiple level switch modules
100 are electrically connected with multiple signal output ends of timing controller 30 in display panel respectively, wherein each level switch module
100 include: level translator 10 and control circuit 20.
Wherein, the input terminal IN of level translator 10 is electrically connected with signal output end corresponding in timing controller 30,
When the power end VIN of level translator 10 connects the first power supply VGH, it is defeated that level translator 10 receives corresponding signal output end
Signal to be converted out simultaneously treats conversion signal and carries out conversion amplification.
For example, as shown in Figure 1, the level converter 1 of the display panel of the embodiment of the present invention may include for example N number of
Level switch module 100, wherein the input terminal IN and timing control of the level translator 10 in the 1st level switch module 100
Signal output end Output1 in chip 30 is connected, the input terminal of the level translator 10 in the 2nd level switch module 100
IN is connected with the signal output end Output2 in timing controller 30, the level conversion in n-th level switch module 100
The input terminal IN of device 10 is connected with the signal output end OutputN in timing controller 30.
Control circuit 20 and the power end VIN and the first power supply VGH of level translator 10 are electrically connected, control circuit
20 for when signal is completed in the resetting for getting timing controller 30, the power end VIN of control level translator 10 to be connected
First power supply VGH.
It is understood that TCON IC (timing controller 30) is first reset after display panel booting powers on, such as carry out
Code Download (program downloading), and normal display output is carried out after resetting is completed.
It should be noted that the level converter 1 of the embodiment of the present invention may be disposed at gate driving circuit 40 for example
For GOA (Gate Driver On Array) between circuit and timing controller 30, GOA circuit is to utilize existing liquid crystal display
Gated sweep driving circuit is produced on Array substrate by array (Array) processing procedure of device, and GOA circuit is used for display panel
In each grid line load gated sweep signal, level translator 10 is for the level signal of the small magnitude of input to be converted into use
In the level signal of the amplitude of driving GOA circuit.Specifically, timing controller 30 can be exported by signal output end wait turn
Signal is changed to level translator 10, threshold voltage by a narrow margin (such as 3.3V) signal to be converted of input is converted by level translator 10
High-amplitude threshold voltage (such as 30V or so) signal, to drive GOA circuit.
According to one embodiment of present invention, as shown in figure 3, the reset signal of control circuit 20 and timing controller 30
RS electrical connection is held, and when the voltage Uset of the reset signal Reset in reset signal end RS reaches la tension de reference Uref est, generates weight
It sets and completes signal, is i.e. Code Download is completed.
Wherein, reference voltage is reset signal Reset voltage achieved when timing controller 30 resets completion.?
That is the voltage Uset of reset signal Reset reaches la tension de reference Uref est when the resetting of timing controller 30 is completed.
It is understood that before the voltage Uset of reset signal Reset reaches la tension de reference Uref est, the voltage of the first power supply VGH
The critical value k that level translator 10 can be made to enter level conversion state is had reached, thus, in the electricity of reset signal Reset
Pressure Uset reaches la tension de reference Uref est, i.e., the power end VIN that control circuit 20 controls level translator 10 connects the first power supply VGH
When, level translator 10 is able to enter level conversion state.
Wherein, la tension de reference Uref est can be determined based on the model of timing controller 30.
It is understood that when the resetting of timing controller 30 due to different model completes to complete program downloading, reset signal
The voltage Uset of Reset may be inconsistent, therefore la tension de reference Uref est can be according to the practical feelings of different timing controllers 30
Condition is set, and versatility can be improved as a result,.
In some embodiments, la tension de reference Uref est can be set by modes such as I2C burning programs.
Further, according to one embodiment of present invention, as shown in figure 4, control circuit 20 includes: controllable switch 21
With compare sub-circuit 22, the first end 21a of controllable switch 21 is electrically connected with the first power supply VGH, the second end 21b of controllable switch 21
It is electrically connected with the power end VIN of level translator 10；Compare the output end of sub-circuit 22 and the control terminal 21c of controllable switch 21
Electrical connection, the first input end for comparing sub-circuit 22 is electrically connected with the reset signal end RS of timing controller 30, when receiving
Sequence controls the reset signal Reset of chip 30, compares the second input terminal of sub-circuit 22 for receiving la tension de reference Uref est, compares
Sub-circuit 22 is used to be compared the voltage Uset of reset signal Reset with la tension de reference Uref est, and in reset signal Reset
Voltage Uset when reaching la tension de reference Uref est control controllable switch 21 be connected.
It should be noted that controllable switch 21 can be MOSFET pipe, IGBT pipe or triode.
It is understood that the voltage Uset in reset signal Reset is greater than or equal to la tension de reference Uref est, i.e. Uset >=Uref
When, compare sub-circuit 22 and controls the unlatching of controllable switch 21, so that the power end VIN of level translator 10 connects the first power supply VGH,
Level translator 10 enters level conversion state, and to the letter to be converted that the timing controller 30 that input terminal IN is received exports
Number carry out conversion amplification.
When the voltage Uset of reset signal Reset is less than la tension de reference Uref est, i.e. Uset < Uref, compare sub-circuit 22
It controls controllable switch 21 to turn off, so that the power end VIN of level translator 10 not can turn on the first power supply VGH, level translator
10 do not enter level conversion state, no matter the signal to be converted that timing controller 30 exports at this time is high level or low electricity
Flat, level translator 10 exports low level always.
Specifically, in embodiments of the present invention, when comparing sub-circuit 22 and controllable switch 21 by setting, while detecting
Sequence controls the voltage Uset of the reset signal Reset of the reset signal end RS of chip 30, in the voltage Uset of reset signal Reset
When less than la tension de reference Uref est, compares sub-circuit 22 and export low level, controllable switch 21 disconnects, and level translator 10 cannot be introduced into
Level conversion state, i.e. output low level, it is more sub when the voltage Uset of reset signal Reset is more than la tension de reference Uref est
Circuit 22 exports high level, and controllable switch 21 is opened, and level translator 10 enters level conversion state, and to the timing received
The signal to be converted that control chip 30 exports carries out conversion amplification.
As a result, multiple signals to be converted can be prevented when booting simultaneously under the premise of not increasing other safeguard procedures
The phenomenon that pull-up, occurs to prevent PMIC from taking out blank screen phenomenon caused by carrying protection.
Specifically, according to one embodiment of present invention, as shown in figure 4, comparing sub-circuit 22 includes: comparator B, first
Resistance R1 and second resistance R2,3rd resistor R3 and the 4th resistance R4, the control of the output end and controllable switch 21 of comparator B
Hold 21c electrical connection；One end of first resistor R1 is electrically connected with the positive input terminal of comparator B, the other end of first resistor R1 and
One end of two resistance R2 is electrically connected, and the other end of first resistor R1 is used to receive the reset signal Reset of timing controller 30,
The other end of second resistance R2 is grounded；One end of 3rd resistor R3 is electrically connected with one end of the 4th resistance R4,3rd resistor R3's
One end is also electrically connected with the negative input end of comparator B, and the other end of 3rd resistor R3 is electrically connected with reference voltage setting end ref,
The other end of 4th resistance R4 is grounded.
It is understood that when the voltage V+ of comparator B positive input terminal is greater than or equal to the voltage V-, i.e. V of negative input end
When+>=V-, the output end of comparator B exports high level, and controllable switch 21 is opened, and the power end VIN of level translator 10 is connected
First power supply VGH, and enter level conversion state, thus to the input terminal IN output of timing controller 30 received wait turn
It changes signal and carries out conversion amplification.When the voltage V+ of comparator B positive input terminal is less than the voltage V-, i.e. V+ < V- of negative input end,
The output end of comparator B exports low level, and controllable switch 21 turns off, and the power end VIN of level translator 10 not can turn on first
Power supply VGH, so that level translator 10 not can enter level conversion state, though at this time timing controller 30 export wait turn
Changing signal is high level or low level, and level translator 10 exports low level always.
Wherein, according to one embodiment of present invention, as shown in figure 4, second resistance R2 is one, wherein multiple level
Conversion module 100 is electrically connected with one end of second resistance R2, the other end ground connection of second resistance R2.
That is, the other end of the first resistor R1 in multiple level switch modules 100 with second resistance R2 one
End electrical connection.
The working principle of the level converter of the display panel of Fig. 4 embodiment is further described below with reference to Fig. 5.Its
In, VGH1 is the voltage for the first power supply VGH that the power end VIN of level translator is electrically connected, and CLKX_T is timing controller
The signal to be converted of 30 outputs, CLKX_L are the output signal of level translator 10.
Wherein, when the voltage Uset of the reset signal Reset of timing controller 30 is not up to la tension de reference Uref est, i.e.,
When Uset < Uref, that is to say, that it is when not completing resetting, when as in Fig. 5 that timing controller 30, which does not complete program downloading also,
Between section 101, the voltage V+ of comparator B positive input terminal is less than the voltage V- of comparator B negative input end, and the output end of comparator B is defeated
Low level out, so that controllable switch 21 disconnects, the power end VIN of level translator 10 not can turn on the first power supply VGH, thus,
Reach critical value k moment to program in the voltage of the first power supply VGH to download in completion this period, i.e., 102 periods in figure, no
It is high level or low level by the signal to be converted that timing controller 30 exports, the output signal of level translator 10 is always
For low level, as shown in 103 in figure.
When the voltage Uset of the reset signal Reset of timing controller 30 reaches la tension de reference Uref est, i.e. Uset >=
When Uref, that is to say, that after timing controller 30 completes resetting i.e. completion program downloading, after the period 101 in Fig. 5,
The voltage V+ of comparator B positive input terminal is greater than or equal to the voltage V- of comparator B negative input end, the output end output of comparator B
High level, so that controllable switch 21 is opened, the power end VIN of level translator 10 connects the first power supply VGH, level translator 10
Into level conversion state, and the signal to be converted exported to timing controller 30 carries out conversion amplification, specifically, works as timing
When the signal to be converted for controlling the output of chip 30 is high level, level translator 10 exports high level, when timing controller 30
When the signal to be converted of output is low level, level translator 10 exports low level.
It is compared as a result, by voltage Uset of the voltage comparator B to reset signal Reset with la tension de reference Uref est,
And opening and shutting off, it can be achieved that being input to level translator to the first power supply VGH according to comparison result control controllable switch 21
10 on-off is controlled, when effectivelying prevent being switched on the phenomenon that the pull-up simultaneously of multiple signals to be converted, to prevent PMIC
Taking out to carry protects caused blank screen phenomenon to occur.
To sum up, the level converter of the display panel proposed according to embodiments of the present invention, control circuit is when getting
When signal is completed in the resetting that sequence controls chip, the power end for controlling level translator connects the first power supply, thus, level translator
It receives the signal to be converted of corresponding signal output end output and treats conversion signal and carry out conversion amplification.The present invention is real as a result,
Apply the display panel of example level converter can prevent timing controller resetting complete before, because of GPO mouthfuls of unstable shape
The phenomenon that multiple signals to be converted caused by state are drawn high simultaneously appearance, and then can avoid occurring opening caused by taking out load protection because of PMIC
The bad phenomenon of machine blank screen.
The level converter of display panel based on the above embodiment, the embodiment of the present invention also proposed a kind of display surface
Plate, the level converter including display panel above-mentioned.
According to one embodiment of present invention, as shown in fig. 6, level converter 1 is electrically connected with timing controller 30,
Level converter 1 is also electrically connected with gate driving circuit 40.
The display panel proposed according to embodiments of the present invention can by the level converter of the display panel of setting
Before preventing timing controller resetting from completing, because of multiple signals to be converted caused by GPO mouthful of unstable states while drawing high
Phenomenon occurs, and then can avoid appearance because of the bad phenomenon for the blank screen that is switched on caused by PMIC pumping load protection.
The level converter of display panel based on the above embodiment, the embodiment of the present invention also proposed a kind of display surface
The control method of the level converter of plate.
Fig. 7 is the flow diagram according to the control method of the level converter of the display panel of the embodiment of the present invention.
Wherein, level converter includes multiple level switch modules, multiple level switch modules respectively with display panel
Multiple signal output ends of middle timing controller are electrically connected, and each level switch module includes level translator, level conversion
The input terminal of device is electrically connected with signal output end corresponding in timing controller, connects first in the power end of level translator
When power supply, level translator receives the signal to be converted of corresponding signal output end output and treats conversion signal and carry out conversion and puts
Greatly.
As shown in fig. 7, the control method of the level converter of the display panel of the embodiment of the present invention the following steps are included:
Signal is completed in S1, the resetting for obtaining timing controller.
In one embodiment of the invention, as shown in figure 8, the resetting completion signal for obtaining timing controller is further
The following steps are included:
S10 receives the reset signal at the reset signal end of timing controller.
S11 generates resetting and completes signal when the voltage of the reset signal at reset signal end reaches reference voltage.
Wherein, reference voltage is reset signal voltage achieved when timing controller resets completion.
Wherein, reference voltage can be determined based on the model of timing controller.
S2, the power end for controlling level translator connect the first power supply.
It should be noted that the explanation of the aforementioned level converter embodiment to display panel is also applied for this reality
The control method of the level converter of the display panel of example is applied, details are not described herein again.
To sum up, the control method of the level converter of the display panel proposed according to embodiments of the present invention is being got
When signal is completed in the resetting of timing controller, the power end for controlling level translator connects the first power supply.The present invention is real as a result,
Apply the level converter of the display panel of example control method can prevent timing controller resetting complete before, because of GPO mouthfuls
Unstable state caused by the phenomenon that the drawing high appearance simultaneously of multiple signals to be converted, and then can avoid occurring taking out to carry because of PMIC protecting
The bad phenomenon of booting blank screen caused by shield.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
Claims (9)
1. a kind of level converter of display panel, which is characterized in that including multiple level switch modules, the multiple level
Conversion module is electrically connected with multiple signal output ends of timing controller in the display panel respectively, wherein each described
Level switch module includes:
Level translator, the input terminal of the level translator are electrically connected with corresponding signal output end in the timing controller
It connects, when the power end of the level translator connects the first power supply, the level translator receives corresponding signal output end
The signal to be converted of output simultaneously carries out conversion amplification to the signal to be converted；And
Control circuit, the control circuit are electrically connected with the power end of the level translator and first power supply, institute
Control circuit is stated for controlling the electricity of the level translator when signal is completed in the resetting for getting the timing controller
Source connects first power supply.
2. the level converter of display panel according to claim 1, which is characterized in that the control circuit with it is described
The reset signal end of timing controller is electrically connected, and the voltage of the reset signal at the reset signal end reaches reference voltage
Signal is completed in resetting described in Shi Shengcheng, wherein the reference voltage is that the reset signal is reset in the timing controller
Voltage achieved when completion.
3. the level converter of display panel according to claim 1, which is characterized in that the control circuit includes:
Controllable switch, the first end of the controllable switch and first power electric connection, the second end of the controllable switch with
The power end of the level translator is electrically connected；
Compare sub-circuit, the output end of the relatively sub-circuit is electrically connected with the control terminal of the controllable switch, and the comparison is sub
The first input end of circuit is electrically connected with the reset signal end of the timing controller, to receive the timing controller
Reset signal, the second input terminal of the relatively sub-circuit for receiving the reference voltage, the relatively sub-circuit for pair
The voltage of the reset signal is compared with the reference voltage, and reaches described with reference to electricity in the voltage of the reset signal
The controllable switch conducting is controlled when pressure.
4. the level converter of display panel according to claim 3, which is characterized in that the relatively sub-circuit packet
It includes:
Comparator, the output end of the comparator are electrically connected with the control terminal of the controllable switch；
First resistor and second resistance, one end of the first resistor are electrically connected with the positive input terminal of the comparator, and described
The other end of one resistance is electrically connected with one end of the second resistance, and the other end of the first resistor is for receiving the timing
Control the reset signal of chip, the other end ground connection of the second resistance；
3rd resistor and the 4th resistance, one end of the 3rd resistor are electrically connected with one end of the 4th resistance, the third
One end of resistance is also electrically connected with the negative input end of the comparator, and the other end and reference voltage of the 3rd resistor set end
Electrical connection, the other end ground connection of the 4th resistance.
5. the level converter of display panel according to claim 4, which is characterized in that the second resistance is one
It is a, wherein the multiple level switch module is electrically connected with one end of the second resistance, the other end of the second resistance
Ground connection.
6. a kind of display panel, which is characterized in that the level including display panel according to any one of claims 1-5
Conversion equipment.
7. display panel according to claim 6, which is characterized in that the level converter and the timing control core
Piece electrical connection, the level converter are also electrically connected with gate driving circuit.
8. a kind of control method of the level converter of display panel, which is characterized in that the level converter includes more
A level switch module, the multiple level switch module multiple signals with timing controller in the display panel respectively
Output end electrical connection, each level switch module includes level translator, the input terminal of the level translator with it is described
Corresponding signal output end electrical connection in timing controller, when the power end of the level translator connects the first power supply,
The level translator receives the signal to be converted of corresponding signal output end output and converts to the signal to be converted
Amplification, the described method comprises the following steps:
Signal is completed in the resetting for obtaining the timing controller；
The power end for controlling the level translator connects first power supply.
9. the control method of the level converter of display panel according to claim 8, which is characterized in that the acquisition
Signal is completed in the resetting of the timing controller
Receive the reset signal at the reset signal end of the timing controller；
When the voltage of the reset signal at the reset signal end reaches reference voltage, generates the resetting and complete signal；
Wherein, the reference voltage is reset signal voltage achieved when the timing controller resets completion.
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| CN201910368633.0A CN110085188B (en) | 2019-05-05 | 2019-05-05 | Level conversion device of display panel, control method thereof and display panel |
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| CN201910368633.0A CN110085188B (en) | 2019-05-05 | 2019-05-05 | Level conversion device of display panel, control method thereof and display panel |
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