CN104464677B - Data access circuit, display panel, display device and driving method - Google Patents
Data access circuit, display panel, display device and driving method Download PDFInfo
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- CN104464677B CN104464677B CN201410848656.9A CN201410848656A CN104464677B CN 104464677 B CN104464677 B CN 104464677B CN 201410848656 A CN201410848656 A CN 201410848656A CN 104464677 B CN104464677 B CN 104464677B
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Abstract
The invention discloses a data access circuit, a display panel, a display device and a driving method. The data access circuit comprises a plurality of data signal input ends, at least one protection signal input end, at least one detection unit and a plurality of selection switching units, wherein the selection switching units are used for selecting output of signals input by the data signal input ends or signals input by the protection signal input ends. Each selection switching unit comprises a first input end, a second input end, a third input end and a selection output end. Each first input end is electrically connected with the corresponding data signal input end, each second input end is electrically connected with the corresponding protection signal input end, and each third input end is electrically connected with the output end of the corresponding detection unit. The detection units control signals output by the selection switching units by judging whether the signals input by the data signal input ends are direct current signals or alternating current signals, so that the problem that when signal input is abnormal, the display panel is polarized is solved.
Description
Technical field
The present invention relates to image display technology field, more particularly to a kind of data access circuit, display floater, aobvious
Showing device and driving method.
Background technology
With the continuous development of science and technology, the electronic equipment with display function is more and more widely applied to people
Work and daily life in, be that work and daily life bring huge facility, become people work with life must
Indispensable instrument.
(Mobile Industry Processor Interface are referred to as due to deadlock or data MIPI for electronic equipment
MIPI when) abnormal signal is input into, the data signal of the input of Driver IC can occur the problem of AC-DC, so as to cause
The display floater of electronic equipment is polarized, the bad problem of image quality such as image retention, frame-type speckle and splashette occurs.
The content of the invention
To solve the above problems, the invention provides a kind of data access circuit, display floater, display device and driving
Method, it is to avoid display floater polarized problem.
For achieving the above object, the invention provides a kind of data access circuit, including：Multiple data signal inputs,
At least one protection signal input, at least one detecting unit and multiple selection switch units, wherein,
The selection switch unit, the signal or the protection for selecting the output data signal input to access is believed
The signal that number input is accessed；The selection switch unit includes first input end, the second input, the 3rd input and choosing
Select outfan；Each is described to select the first input end of switch unit to electrically connect a data signal input, and described the
Two inputs electrically connect the protection signal input, and the 3rd input electrically connects the outfan of the detecting unit；
The detecting unit, by judging that the signal that the data signal input is accessed still exchanges letter for direct current signal
Number controlling the signal of the selection switch unit output, if the data signal input accesses direct current signal, control is described
The outfan that selects for selecting switch unit exports the signal that the protection signal input is accessed；If the data signal input
Incoming transport signal, controls the letter of the selection outfan output data signal input access for selecting switch unit
Number.
Preferably, it is described to select the number of switch unit to be input into the data signal in above-mentioned data access circuit
The number at end is equal, and the selection switch unit is corresponded with the data signal input.
Preferably, in above-mentioned data access circuit, the data access circuit includes a detecting unit, described
Detecting unit also includes a test side；The test side and any one of data in the plurality of data signal input
Signal input part is electrically connected；3rd input of all selection switch units of outfan electrical connection of the detecting unit；
When the detecting unit judges the data signal input incoming transport signal, the detecting unit output first
Control signal, when the detecting unit judges that the data signal input accesses direct current signal, the detecting unit output the
Two control signals.
Preferably, in above-mentioned data access circuit, the data access circuit includes multiple detecting units, each
The detecting unit also includes a test side；The test side is from any one is different in the plurality of data signal input
The data signal input electrical connection；
3rd input of arbitrary selection switch unit electrically connects the outfan of a detecting unit, an institute
The outfan for stating detecting unit at least electrically connects the 3rd input of a selection switch unit；
When the detecting unit judges corresponding data signal input part incoming transport signal, the detecting unit output first
Control signal, when the detecting unit judges that corresponding data signal input part accesses direct current signal, detecting unit output the
Two control signals.
Preferably, in above-mentioned data access circuit, the number of the detecting unit and the data signal input phase
Deng, and the detecting unit corresponds with the data signal input, the test side electrical connection of each detecting unit
The corresponding data signal input, the outfan of each detecting unit electrically connects the corresponding selection switch unit
The 3rd input.
Preferably, it is described to select the 3rd input of switch unit to access described first in above-mentioned data access circuit
During control signal, the selection switch unit exports the signal that the data signal input is accessed；The selection switch unit
The 3rd input when accessing second control signal, the selection switch unit exports the protection signal input and accesses
Signal.
Preferably, in above-mentioned data access circuit, the detecting unit includes：First electric capacity and unidirectional modulation rectification
Circuit；
The unidirectional modulation rectification circuit includes：First diode, the second diode, the 3rd diode, the 4th diode
And second electric capacity；
The positive pole of first diode connects the negative pole of second diode, the positive pole connection of second diode
The positive pole of the 4th diode, the positive pole of negative pole connection the 3rd diode of the 4th diode, the described 3rd 2
The negative pole of pole pipe connects the negative pole of first diode, the negative pole of first diode by second electric capacity with it is described
The positive pole connection of the second diode, the plus earth of the 3rd diode；
First pole plate of first electric capacity is test side, for receiving the signal that the data signal input is accessed；
Second pole plate connects the positive pole of first diode；
Wherein, the positive pole of second diode, the positive pole of the 4th diode and second electric capacity is public
Node is the outfan of the detecting unit, for exporting the first control signal or the second control signal.
Preferably, in above-mentioned data access circuit, the selection switch unit includes：Selector；The selector bag
Include：Normal phase input end, inverting input, selection end and outfan；The inverting input electrical connection described the of the selector
One input, its normal phase input end electrically connects second input, and it selects end to electrically connect the 3rd input, its output
The selection outfan of the end electrical connection selection switch unit.
Preferably, in above-mentioned data access circuit, the protection signal input incoming transport signal.
Preferably, in above-mentioned data access circuit, the data access circuit is used for normally-black liquid crystal panel, the guarantor
Shield signal input part accesses black picture AC signal；
Or, the data access circuit is used for normal white liquor crystal panel, the protection signal input accesses white picture exchange
Signal.
Present invention also offers a kind of display floater, including a plurality of data lines, in data wire electrical connection described at least one
State the outfan that switch unit is selected described in any one data access circuit.
Preferably, in above-mentioned display floater, the data wire includes multiple data line groups, each described data line group bag
Include at least two different data wires, the number of the selection switch unit, the number of the data signal input and institute
The number for stating data line group is equal and correspond, and the corresponding selection of the input of each data line group electrical connection is cut
Change the selection outfan of unit, the corresponding data signal input of first input end electrical connection of the selection switch unit
End.
Preferably, in above-mentioned display floater, it is described select the number of switch unit, the data signal input
The quantity of the several and data wire is equal and corresponds, corresponding per data wire electrical connection described in bar described to select switching single
The selection outfan of unit, the first input end of the selection switch unit electrically connects the corresponding data signal input.
Present invention also offers a kind of display device, including display floater described in any of the above-described and data signal source, institute
State data signal source and provide data signal for data signal input each described.
Preferably, in above-mentioned display device, the data signal source is printed circuit board (PCB), electronic chip or data-driven
Circuit.
Present invention also offers a kind of driving method of display device, the display device includes a plurality of data lines, the drive
Dynamic method includes：
Data signal and protection signal are provided；
Judge that the data signal is direct current signal or AC signal；
If the data signal is direct current signal, the protection signal is supplied to into the data wire, if the number
It is believed that number be AC signal, the data signal is supplied to into the data wire.
Data access circuit, display floater, display circuit and driving method that the present invention is provided, in data signal input
When the signal of access is normal AC signal, the selection switch unit exports the AC signal, defeated in the data signal
Enter terminate into signal be direct current signal, that is, when occurring abnormal, the selection switch unit exports the protection signal input
The harmonics signal of access, it is to avoid the polarized problem of display floater, it is to avoid image retention, frame-type speckle and splashette occur
The problem bad etc. image quality.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
A kind of structural representation of data access circuit that Fig. 1 is provided for the embodiment of the present application；
The structural representation of another kind of data access circuit that Fig. 2 is provided for the embodiment of the present application；
A kind of structural representation of detecting unit that Fig. 3 is provided for this embodiment of the present application；
A kind of structural representation of selection switch unit that Fig. 4 is provided for the embodiment of the present application；
A kind of structural representation of display floater that Fig. 5 is provided for the embodiment of the present application；
The structural representation of another kind of display floater that Fig. 6 is provided for the embodiment of the present application；
A kind of structural representation of display device that Fig. 7 is provided for the embodiment of the present application；
The structural representation of another kind of display device that Fig. 8 is provided for the embodiment of the present application；
A kind of schematic flow sheet of driving method that Fig. 9 is provided for the embodiment of the present application.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As stated in the Background Art, in existing technology, electronic equipment is due to deadlock or the input of data MIPI abnormal signal
When, the data signal of the input of Driver IC can occur the problem of AC-DC, so as to cause the display floater of electronic equipment
It is polarized, there is the bad problem of image quality such as image retention, frame-type speckle and splashette, affect display effect.
To solve the above problems, the embodiment of the present application provides a kind of data access circuit, and as shown in Figure 1 the data connect
Entering circuit 10 includes：Multiple data signal input D1, at least one protection signal input B1, at least one detecting unit 12
Switch units 11 are selected with multiple, wherein, the selection switch unit 11, for selecting the output data signal input D1
The signal that the signal of access or the protection signal input B1 are accessed；It is described selection switch unit include first input end S11,
Second input S12, the 3rd input S13 and selection outfan S14；First input of each selection switch unit 11
End S11 electrically connects a data signal input D1, and the second input S12 electrically connects the protection signal input
D2, the 3rd input S13 electrically connects the outfan EN of the detecting unit.What the protection signal input B1 was accessed is
AC signal.
Please continue to refer to Fig. 1, the detecting unit 12, for judging that the signal that the data signal input D1 is accessed is
Direct current signal or AC signal controlling the signal of selection switch unit 11 output, if the data signal input D1
Direct current signal is accessed, the selection outfan S14 outputs protection signal input B1 for controlling the selection switch unit 11 connects
The signal for entering；If the data signal input D1 incoming transport signals, the selection output of the selection switch unit 11 is controlled
End S14 exports the signal that the data signal input D1 is accessed.I.e. when the signal appearance of the data signal input D1 is different
Chang Shi, the detecting unit 12 can control the second input of the protection signal input B1, the selection switch unit 11
End S12 and selection outfan S14 form electric pathway；Conversely, working as the data signal input D1 incoming transport signals, that is, work as institute
State data signal input D1 signal it is normal when, the detecting unit 12 can control the data signal input D1, institute
State the first input end S11 and selection outfan S14 formation electric pathways for selecting switch unit 11.
Detecting unit provided in an embodiment of the present invention 12 can have multiple, it is also possible to only one of which；Each detecting unit 12
A selection switch unit 11 can be controlled, it is also possible to control multiple selection switch units 11.Fig. 1 is the number of detecting unit 12
Annexation during and one-to-one corresponding equal with switch unit 11 is selected.As shown in figure 1, one selects the correspondence of switch unit 11 one
Individual detecting unit 12.The detecting unit 12 has outfan EN and test side EM.
The selection switch unit 11 that the present embodiment is provided can be equal with the number of data input pin D1, it is also possible to data
The number of input D1 is unequal.When selecting switch unit 11 equal with the number of data input pin D1, achievable selection is cut
The one-to-one corresponding of unit 11 and data input pin D1 is changed, as shown in figure 1, each selects switch unit 11 to include first input end
S11, the second input S12, the 3rd input S13 and selection outfan S14.Each first input end S11 correspondences connection one
Individual data signal input D1, the second input S12 connects the protection signal input B1, the 3rd input
The outfan EN of S13 connection correspondence detecting units 12.The selection switch unit 11 is used to select the corresponding data of output
The signal that the signal or the protection signal input B1 that signal input part D1 is accessed is accessed.
3rd input S13 of outfan EN correspondence one switch unit 11 of connection of one detecting unit 12, its detection
End EM connections are corresponding to select the corresponding data signal input D1 of switch unit 11.The detecting unit 12 be used for judge with
Connection select whether the signal that the corresponding data signal input D1 of switch unit 11 accesses is direct current signal, if data letter
Number input D1 accesses direct current signal, and controlling the selection outfan S14 of the selection switch unit 11, to export the protection signal defeated
The signal for entering to hold B1 to access.Specifically, the detecting unit 12 can be set and judges that the data signal input D1 accesses friendship
During stream signal, the detecting unit 12 exports the first control signal, and the detecting unit 12 judges the data signal input
When accessing direct current signal, the detecting unit exports the second control signal.
No matter Fig. 1 illustrated embodiments, when carrying out showing driving, start appearance straight from which data signal input D1
Stream signal, all can be detected so that each switch unit 11 will not export direct current signal in the very first time.
Further, protection signal input B1 can have multiple, can also only have one, as long as ensureing all of selection switching
Second input S12 of unit 11 is electrically connected with protection signal input B1.
In the present embodiment, the data access circuit 10 may include multiple detecting units 12, and each described detecting is single
Unit 12 also includes a test side EM；When the number of detecting unit 12 and data signal input is unequal, the test side
EM and the data signal input D1 electrical connections that any one is different in the plurality of data signal input D1；Arbitrary institute
The 3rd input S13 for stating selection switch unit 11 only electrically connects the outfan EN of a detecting unit 12, i.e. each choosing
Select switch unit only to be controlled by a detecting unit 12.The outfan EN of one detecting unit 12 at least electrically connects one
3rd input S13 of the individual selection switch unit, i.e. each described detecting unit 12 can control multiple selections and cut
Change unit 11.
When the multiple selection switch units of the outfan connection of a detecting unit, the detecting unit is used to judge and it
Any one in multiple selection switch units of outfan connection selects what the corresponding data signal input of switch unit was accessed
Whether signal is direct current signal, and if so, then the selection outfan of all selection switch units that control is connected with its outfan is defeated
Go out the signal that the protection signal input is accessed.
The present invention also provides a kind of data access circuit, and it only includes a detecting unit, its annexation such as Fig. 2 institutes
Show.Fig. 2 illustrated embodiments are different from Fig. 1 to be, all to select the 3rd of switch unit 11 only including a detecting unit 12
Input S13 is all connected with the outfan EN of the detecting unit 12.The test side EM of the detecting unit 12 and any one data signal
Input D1 is electrically connected.
With above-mentioned embodiment, the detecting unit 12 can be set and judge data signal input D1 incoming transport signals
When, the detecting unit 12 exports the first control signal, and it is straight that the detecting unit 12 judges that data signal input D1 is accessed
During stream signal, the detecting unit exports the second control signal.
, relative to Fig. 1 illustrated embodiments, detecting unit 12 is in the first frame for direct current signal occur for Fig. 2 illustrated embodiments
In, have part and select the selection outfan S14 of switch unit 11 to export a direct current signal, but, can make in subsequent frames
The signal that the selection outfan S14 output protection signal input parts B1 of switch unit 11 all must be selected to access, relative to existing
Technology reduces display floater polarization problem, and reduces that the image qualities such as image retention, frame-type speckle and splashette occur bad
Problem degree.Meanwhile, a detecting unit 12 is only needed relative to Fig. 1 illustrated embodiments, circuit structure is simplified, drop
Low cost.
With reference to Fig. 3, a kind of structural representation of detecting unit 12 that Fig. 3 is provided for this embodiment of the present application.The detecting
Unit 12 includes：First electric capacity C1 and unidirectional modulation rectification circuit.Wherein, the unidirectional modulation rectification circuit includes：First
Diode T1, the second diode T2, the 3rd diode T3, the 4th diode T4 and the second electric capacity C2.
The positive pole of the first diode T1 connects the negative pole of the second diode T2, and the second diode T2 is just
Pole connects the positive pole of the 4th diode T4, and the negative pole of the 4th diode T4 is connecting the 3rd diode T3 just
Pole, the negative pole of the 3rd diode T3 connects the negative pole of the first diode T1, and the negative pole of the first diode T1 leads to
Cross the second electric capacity C2 to be connected with the positive pole of the second diode T2, the plus earth of the 3rd diode T3.
First pole plate of the first electric capacity C1 is the test side EM of detecting unit 12, defeated for receiving the data signal
The signal for entering to hold D1 to access；Second pole plate connects the positive pole of the first diode T1.
Wherein, the positive pole of the second diode T2, the positive pole of the 4th diode T4 and the second electric capacity C2
Common node be the detecting unit 12 outfan EN, for exporting the first control signal or the second control signal.
Detecting unit 12 shown in Fig. 3, the first electric capacity C1 is capacitance, in test side during EM input exchange signals,
The AC signal is still AC signal by the first electric capacity C1, then by the unidirectional modulation rectification circuit, is rectified into
The direct current signal of setting amplitude, i.e. the first control signal.In test side during EM input direct-current signals, the first electric capacity C1 every
It is changed into 0V under direct current effect, then 0V thinks 0V by the unidirectional modulation rectification circuit, i.e., described second control signal.
It can be seen that, the test side EM of detecting unit 12 shown in Fig. 3 can be according to the direct current of input signal or exchange output not
The control signal of same level.
With reference to Fig. 4, a kind of structural representation of selection switch unit 11 that Fig. 4 is provided for the embodiment of the present application.The choosing
Switch unit is selected including selector；The selector includes：Normal phase input end 42, inverting input 41, select end 43 and defeated
Go out end 44；The inverting input 41 of the selector electrically connects the first input end S11, its electrical connection of normal phase input end 42 institute
The second input S12 is stated, it selects end 43 to electrically connect the 3rd input S13, and its outfan 44 electrically connects described selection
The selection outfan S14 of switch unit.Using selector as the selection switch unit 11, when it selects end 43 to be input into high electricity
During ordinary mail, its outfan 44 can export the signal of the access of inverting input 41, when it selects 43 input low level signal of end,
Its outfan 44 can export the signal of the access of normal phase input end 42.
Using detecting unit shown in Fig. 3, the selection switch unit 11 can realize that the incoming transport of inverting input 41 is believed
Number when, export the AC signal, its access direct current signal when, export normal phase input end 42 access harmonics signal, should
Harmonics signal is the signal that protection signal input B1 is accessed.
When the data access circuit is used for normally-black liquid crystal panel, the protection signal input accesses black picture exchange
Signal.When the data access circuit is used for normal white liquor crystal panel, the protection signal input accesses white picture AC signal.
The embodiment of the present application additionally provides a kind of display floater, and the display floater includes a plurality of data lines, at least one institute
The outfan that switch unit is selected described in any one data access circuit that data wire electrically connects described in above-described embodiment is stated, i.e.,
Connect corresponding data signal output.
In the display floater, the data wire includes multiple data line groups, and each described data line group is included at least
Two different data wires, the number of the selection switch unit, the number of the data signal input and the data
The number of line group is equal and corresponds, and the input of each data line group electrically connects the corresponding selection switch unit
Outfan, the first input end of the selection switch unit electrically connects the corresponding data signal input.
When each described data line group includes at least two different data wires, the number of the selection switch unit, institute
State data signal input number and the data line group number it is equal and correspond when, the knot of the display floater
Structure may be referred to Fig. 5, a kind of structural representation of display floater 50 that Fig. 5 is provided for the embodiment of the present application.
The display floater 50 includes multiple data line groups DD, and each data line group DD includes three data lines 53, respectively
For driving R pixel cells row, G pixel cells row and B pixel cells row.One data line group DD correspondence one selects switching
Unit 11, and one data signal input D1 of correspondence.One selection outfan S14 correspondence electrical connection, one data signal output
End S1.The selection outfan S14 of the corresponding selection switch unit 11 of input electrical connection of each data line group DD,
Connect corresponding data signal output S1.Different data signal input D1 can access different data signals, and then
The exportable different data signals of different data signal output S1.The detecting of data access circuit is not showed that in Figure 5
Unit, concrete structure can be found in above-described embodiment description.
In same data line group DD, the data wire of string pixel cell by a corresponding transistor 51 with it is corresponding
Data signal output S1.The source electrode of the transistor 51 connects corresponding data signal output S1, the corresponding number of drain electrode connection
According to line input, grid connects corresponding clock signal.The grid connection of the corresponding transistor 51 of data wire of R pixel cells row
Clock signal CKHR, grid connection clock signal CKHG of the corresponding transistor 51 of data wire of G pixel cells row, B pixel lists
Grid connection clock signal CKHB of the corresponding transistor 51 of data wire of unit's row.Adopted by controlling each clock signal sequential
Same data signal output S1 provides data signal for the different pieces of information line of same data line group DD.
In other embodiments, it is described select the number of switch unit, the number of the data signal input and
The quantity of the data wire is equal and corresponds, corresponding per data wire electrical connection described in bar described to select the defeated of switch unit
Go out end, it is described to select the first input end of switch unit to electrically connect the corresponding data signal input.Now, the display
The structure of panel may be referred to Fig. 6, the structural representation of another kind of display floater 60 that Fig. 6 is provided for the embodiment of the present application.Together
Sample, does not show that in figure 6 the detecting unit of data access circuit, and concrete structure can be found in above-described embodiment description.
In the display floater 60, number, the number of data signal input D1 and the data of switch unit 11 are selected
The quantity of line 53 is equal, and corresponds.The selection that the input of one data line 53 connects a selection switching circuit 11 is defeated
Go out and hold S14, i.e., data signal output S1 connections corresponding with.The first input end S11 of one selection switch unit 11
Electrically connect the corresponding data signal input D1.
Display floater described in the embodiment of the present application, using above-mentioned data access circuit, can avoid display floater polarized,
There is the bad problem of image quality such as image retention, frame-type speckle and splashette so as to avoid.
With reference to Fig. 7, a kind of structural representation of display device 70 that Fig. 7 is provided for the embodiment of the present application.The display device
70 include：Display floater 71 and data signal source 72.The display floater is above-mentioned display floater, its data wire and corresponding data
Signal input part D1 connects.The data signal source 72 provides data signal for data signal input D1 each described.The reality
In applying mode, data signal source 72 is arranged on outside the display floater 71.The data signal source 72 can for printed circuit board (PCB),
Electronic chip or data drive circuit (Driver IC).
With reference to Fig. 8, the structural representation of another kind of display device 80 that Fig. 8 is provided for the embodiment of the present application.It is real shown in Fig. 8
The mode difference of applying is that data signal source 72 has been arranged in display floater 71.
Display device described in the embodiment of the present application, using above-mentioned display floater, can avoid display floater polarized, so as to
Avoid and the bad problem of image quality such as image retention, frame-type speckle and splashette occur.
Based on above-mentioned each embodiment, the embodiment of the present application additionally provides a kind of driving method.With reference to Fig. 9, Fig. 9 is this Shen
Please embodiment provide a kind of driving method schematic flow sheet.The driving method is used to drive display described in above-described embodiment
Device, the display device includes a plurality of data lines.The driving method includes：
Step S91：Data signal and protection signal are provided；
Step S92：Judge that the data signal is direct current signal or AC signal.
The data signal is the signal that above-mentioned data signal input D1 is accessed.Specifically, the data signal is institute
State the signal that data signal source is supplied to corresponding data signal input D1.
Step S93：If the data signal is direct current signal, the protection signal is supplied to into the data wire,
The protection signal is the signal that protection signal input B1 is accessed.The protection signal be AC signal, with
When showing abnormal, prevent display floater polarized.
Step S94：If the data signal is AC signal, the data signal is supplied to into the data wire.
The driving method carry out show drive when, to data signal source provide signal detect, judge that it is
Direct current signal or AC signal, when it is direct current signal, for the signal that data wire provides the access of protection signal input, prevent
Only display floater is polarized, and when it is exchange, the signal provided by the data signal source is supplied to data wire.Therefore,
The driving method can prevent display floater caused by DC supply input data wire polarized, it is to avoid image retention, frame-type occur
The bad problem of the image quality such as speckle and splashette.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (16)
1. a kind of data access circuit, including：Multiple data signal inputs, at least one protection signal input, at least one
Individual detecting unit and multiple selection switch units, wherein,
The selection switch unit, the signal or the protection signal for selecting the output data signal input to access is defeated
Enter terminate into signal；The selection switch unit includes first input end, the second input, the 3rd input and selects defeated
Go out end；The first input end of each selection switch unit electrically connects a data signal input, and described second is defeated
Enter the end electrical connection protection signal input, the 3rd input electrically connects the outfan of the detecting unit；
The detecting unit, by judge signal that the data signal input accesses for direct current signal or AC signal come
The control signal for selecting switch unit to export, if the data signal input accesses direct current signal, controls the selection
The outfan that selects of switch unit exports the signal that the protection signal input is accessed；If the data signal input is accessed
AC signal, controls the signal of the selection outfan output data signal input access for selecting switch unit.
2. data access circuit according to claim 1, it is characterised in that the number of the selection switch unit with it is described
The number of data signal input is equal, and the selection switch unit is corresponded with the data signal input.
3. data access circuit according to claim 2, it is characterised in that the data access circuit is included described in
Detecting unit, the detecting unit also includes a test side；Appoint in the test side and the plurality of data signal input
The data signal input electrical connection of meaning one；The outfan of the detecting unit electrically connects all selection switch units
The 3rd input；
When the detecting unit judges the data signal input incoming transport signal, the detecting unit output first is controlled
Signal, when the detecting unit judges that the data signal input accesses direct current signal, the detecting unit output second is controlled
Signal processed.
4. data access circuit according to claim 2, it is characterised in that the data access circuit includes multiple described
Detecting unit, each described detecting unit also includes a test side；The test side and the plurality of data signal input
In any one different described data signal input electrical connection；
3rd input of arbitrary selection switch unit electrically connects the outfan of a detecting unit, detects described in one
The outfan for surveying unit at least electrically connects the 3rd input of a selection switch unit；
When the detecting unit judges corresponding data signal input part incoming transport signal, the detecting unit output first is controlled
Signal, when the detecting unit judges that corresponding data signal input part accesses direct current signal, the detecting unit output second is controlled
Signal processed.
5. data access circuit according to claim 4, it is characterised in that the number of the detecting unit and the data
Signal input part is equal, and the detecting unit is corresponded with the data signal input, each detecting unit
Test side electrically connects the corresponding data signal input, and the outfan electrical connection of each detecting unit is corresponding described
Select the 3rd input of switch unit.
6. the data access circuit according to any one of claim 3 to 5, it is characterised in that the of the selection switch unit
When three inputs access first control signal, the selection switch unit exports the letter that the data signal input is accessed
Number；When 3rd input of the selection switch unit accesses second control signal, the selection switch unit exports institute
State the signal of protection signal input access.
7. data access circuit according to claim 1, it is characterised in that the detecting unit includes：First electric capacity with
And unidirectional modulation rectification circuit；
The unidirectional modulation rectification circuit includes：First diode, the second diode, the 3rd diode, the 4th diode and
Second electric capacity；
The positive pole of first diode connects the negative pole of second diode, and the positive pole connection of second diode is described
The positive pole of the 4th diode, the negative pole of the 4th diode connects the positive pole of the 3rd diode, the 3rd diode
Negative pole connect the negative pole of first diode, the negative pole of first diode passes through second electric capacity and described second
The positive pole connection of diode, the plus earth of the 3rd diode；
First pole plate of first electric capacity is test side, for receiving the signal that the data signal input is accessed；Second
Pole plate connects the positive pole of first diode；
Wherein, the common node of the positive pole of second diode, the positive pole of the 4th diode and second electric capacity
It is the outfan of the detecting unit, for exporting the first control signal or the second control signal.
8. data access circuit according to claim 7, it is characterised in that the selection switch unit includes：Selector；
The selector includes：Normal phase input end, inverting input, selection end and outfan；The inverting input of the selector
The first input end is electrically connected, its normal phase input end electrically connects second input, it selects end electrical connection the described 3rd
Input, the selection outfan of its outfan electrical connection selection switch unit.
9. data access circuit according to claim 1, it is characterised in that the protection signal input incoming transport letter
Number.
10. data access circuit according to claim 9, it is characterised in that the data access circuit is used for normally-black liquid
Crystal panel, the protection signal input accesses black picture AC signal；
Or, the data access circuit is used for normal white liquor crystal panel, the protection signal input accesses white picture AC signal.
A kind of 11. display floaters, including a plurality of data lines, such as claim 1-10 of data wire electrical connection described at least one is arbitrary
The outfan of switch unit is selected described in data access circuit described in.
12. display floaters according to claim 11, it is characterised in that the data wire includes multiple data line groups, often
The individual data line group includes at least two different data wires, and the number of the selection switch unit, the data signal are defeated
Enter end number and the data line group number it is equal and correspond, the electrical connection of the input of each data line group
The selection outfan of the corresponding selection switch unit, the first input end of the selection switch unit electrically connects corresponding institute
State data signal input.
13. display floaters according to claim 11, it is characterised in that the number of the selection switch unit, the number
According to the number of signal input part and the quantity of the data wire it is equal and correspond, per described in bar data wire electrical connection correspondence
The selection switch unit selection outfan, the first input end of the selection switch unit electrically connects the corresponding number
According to signal input part.
14. a kind of display devices, including display floater and data signal source as described in any one of claim 11 to 13, the number
Data signal is provided according to signal source for data signal input each described.
15. display devices according to claim 14, it is characterised in that the data signal source is printed circuit board (PCB), electricity
Sub- chip or data drive circuit.
A kind of 16. driving methods of display device, the display device being applied to described in any one of claim 14～15 is described aobvious
Showing device includes a plurality of data lines, and the driving method includes：
Data signal and protection signal are provided；
Judge that the data signal is direct current signal or AC signal；
If the data signal is direct current signal, the protection signal is supplied to into the data wire, if data letter
Number be AC signal, the data signal is supplied to into the data wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848656.9A CN104464677B (en) | 2014-12-26 | 2014-12-26 | Data access circuit, display panel, display device and driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848656.9A CN104464677B (en) | 2014-12-26 | 2014-12-26 | Data access circuit, display panel, display device and driving method |
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| CN104464677A CN104464677A (en) | 2015-03-25 |
| CN104464677B true CN104464677B (en) | 2017-05-03 |
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| CN106373540A (en) * | 2016-10-28 | 2017-02-01 | 上海中航光电子有限公司 | Liquid crystal display panel, driving method thereof and liquid crystal display device |
| CN113342105B (en) * | 2021-06-03 | 2022-11-11 | 昆山国显光电有限公司 | Power supply adjusting device and method of display panel and display device |
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| WO2006049245A1 (en) * | 2004-11-05 | 2006-05-11 | Sharp Kabushiki Kaisha | Liquid crystal display apparatus and method for driving the same |
| CN100530320C (en) * | 2006-04-28 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Electric voltage detecting circuit and electric discharge lamp driven apparatus using same |
| KR101257926B1 (en) * | 2006-06-07 | 2013-04-24 | 엘지디스플레이 주식회사 | Back light unit of liquid crystal display and method for driving the same |
| WO2011024338A1 (en) * | 2009-08-28 | 2011-03-03 | シャープ株式会社 | Liquid crystal display device and potential setting method therefor |
| WO2011065063A1 (en) * | 2009-11-27 | 2011-06-03 | シャープ株式会社 | Liquid crystal display device and method for driving a liquid crystal display device |
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