CN104916249A - Drive circuit used for display panel, and display device - Google Patents
Drive circuit used for display panel, and display device Download PDFInfo
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- CN104916249A CN104916249A CN201510367224.0A CN201510367224A CN104916249A CN 104916249 A CN104916249 A CN 104916249A CN 201510367224 A CN201510367224 A CN 201510367224A CN 104916249 A CN104916249 A CN 104916249A
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Abstract
The invention discloses a drive circuit used for a display panel, and a display device. The drive circuit comprises a control circuit, a switching circuit and an integrated circuit. The output end of the control circuit is connected with the control input end of the switching circuit and used for transmitting control signals to the switching circuit so as to control on/off of the switching circuit. The output end of the integrated circuit is connected with the signal input end of the switching circuit and used for transmitting at least one path of shift register signal to the switching circuit. The output end of the switching circuit is connected with the display panel and used for transmitting at least one path of shift register signal to the display panel when the switching circuit is controlled to be on through the control signals so as to drive the display panel. Output of the shift register signal is controlled by the hardware control circuit and the switching circuit without setting control parameters in the integrated circuit IC to control output of each path of shift register signal so that the control process through the hardware mode is easy.
Description
Technical field
The present invention relates to display technique, particularly relate to a kind of driving circuit for display panel and display device.
Background technology
Existing display device mainly comprises display panel and drives the integrated circuit (IC) of display panel, and integrated circuit (IC) is connected with display panel, for showing to display panel transmission shift LD signal to drive display panel.
The shift LD signal of display panel is driven at least to comprise: display panel input signal (STV), display panel scanning sequence signal (CKV), display panel data switch signal (CKH), display panel forward scan signal (U2D), display panel reverse scan signal (D2U), display panel reset signal (GRESET).
In prior art, the shift LD signals such as STV, CKV, CKH, U2D, D2U, GRESET are all arranged by IC to control whether to export display panel to.Particularly, display panel has multiple signal input part to receive the shift LD signal of IC, and write different controling parameters by giving in integrated circuit (IC), whether integrated circuit (IC) controls certain road shift LD signal according to this controling parameters and export.
Prior art is whether the controling parameters control shift LD signal by arranging in integrated circuit (IC) exports, and cannot realize controlling the output of shift LD signal by hardware circuit.
Summary of the invention
The invention provides a kind of driving circuit for display panel and display device, to solve the problem of prior art.
First aspect, a kind of driving circuit for display panel provided by the invention, comprising: control circuit, on-off circuit and integrated circuit, wherein:
The output terminal of described control circuit connects the control input end of described on-off circuit, for described on-off circuit transmission of control signals, to control being turned on or off of described on-off circuit;
The output terminal of described integrated circuit connects the signal input part of described on-off circuit, for transmitting at least one road shift LD signal to described on-off circuit;
The output terminal of described on-off circuit connects described display panel, and for when described control signal controls described on-off circuit conducting, the output terminal of described on-off circuit is by the extremely described display panel of shift LD Signal transmissions described at least one road.
Second aspect, the present invention also provides a kind of display device, comprises driving circuit as described in relation to the first aspect.
A kind of driving circuit for display panel provided by the invention and display device, driving circuit passes through conducting and the disconnection of control circuit gauge tap circuit, by integrated circuit (IC) to on-off circuit transmission shift LD signal, on-off circuit is under the control of control circuit during conducting, then on-off circuit by receive at least one road shift LD Signal transmissions to display panel, to drive display panel.The control circuit of the present invention by hardware and the output of on-off circuit control shift LD signal, do not need in integrated circuit (IC), to arrange controling parameters to control the output of each road shift LD signal, therefore simple by the process that hardware mode controls.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, introduce doing one to the accompanying drawing used required in embodiment or description of the prior art simply below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of driving circuit for display panel that the embodiment of the present invention provides;
Fig. 2 a is the schematic diagram of a kind of driving circuit for display panel that the embodiment of the present invention provides;
Fig. 2 b is another schematic diagram for the driving circuit of display panel that the embodiment of the present invention provides;
Fig. 2 c is another schematic diagram for the driving circuit of display panel that the embodiment of the present invention provides;
Fig. 3 is another schematic diagram for the driving circuit of display panel that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, hereinafter with reference to the accompanying drawing in the embodiment of the present invention, by embodiment, technical scheme of the present invention is described clearly and completely, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Shown in figure 1, it is the schematic diagram of a kind of driving circuit for display panel that first embodiment of the invention provides.The technical scheme of the embodiment of the present invention is applicable to control by hardware circuit the situation that display panel receives shift LD control signal.As shown in the figure, this driving circuit being used for display panel 400 comprises: control circuit 100, integrated circuit (IC) 200 and on-off circuit 300.
Wherein, the control input end of the output terminal connecting valve circuit 300 of control circuit 100, the signal input part of the output terminal connecting valve circuit 300 of integrated circuit (IC) 200, the output terminal of on-off circuit 300 connects display panel 400.
Control circuit 100 for the control input end transmission of control signals to on-off circuit 300, with being turned on or off of gauge tap circuit 300.Optionally, the control signal that control circuit 100 transmits to the control input end of on-off circuit 300 comprises the first control signal or the second control signal, first control signal gauge tap circuit 300 conducting is preferably set, and the second control signal gauge tap circuit 300 disconnects.Whether control circuit 100 exports shift LD signal for gauge tap circuit 300.
Integrated circuit (IC) 200 for transmitting at least one road shift LD signal to the signal input part of on-off circuit 300, to export at least one road shift LD signal by on-off circuit 300 to display panel 400.Concrete, integrated circuit (IC) 200 is for exporting at least one road shift LD signal, at least one road shift LD signal that on-off circuit 300 receiving integrate circuit IC200 transmits, when after on-off circuit 300 conducting, at least one road shift LD signal received can export by on-off circuit 300, after on-off circuit 300 disconnects, the output terminal of on-off circuit 300 is unsettled, does not output signal.
The control signal of control input end reception control circuit 100 output of on-off circuit 300, for being turned on or off under the control of control circuit 100, at least one road shift LD signal that the signal input part receiving integrate circuit IC200 of on-off circuit 300 exports, for exporting at least one road shift LD signal when conducting.Concrete, on-off circuit 300 is for when control signal gauge tap circuit 300 conducting that control circuit 100 exports, at least one road shift LD Signal transmissions that signal input part receives by the output terminal of on-off circuit 300 to display panel 400, to drive display panel 400.
It should be noted that, the signal input part of on-off circuit 300 receives at least one road shift LD signal, whether the control signal that the control input end of on-off circuit 300 receives transfers to display panel 400 specifically for each road shift LD signal that gauge tap circuit 300 receives respectively, therefore the corresponding corresponding control signal of each road shift LD signal, the independence that control circuit 100 realizes respectively to whether each road shift LD signal exports controls.
The shift LD signal that display panel 400 receiving key circuit 300 exports, and perform corresponding operating according to the shift LD signal received.
Optionally, control circuit 100 is flexible print circuit board (FPC).The control signal of on-off circuit 300 is connected to FPC, by being turned on or off, to control the way of output of each road shift LD signal of the control signal gauge tap circuit 300 of FPC.In prior art, whether integrated circuit (IC) 200 controls each road shift LD signal according to the parameter value preset and exports; And in the present embodiment, the circuit and line that control the output of shift LD signal are arranged in FPC, whether export shift LD signal to display panel 400 with FPC gauge tap circuit 300, achieve and control each road shift LD signal by hardware circuit FPC, on-off circuit 300 and whether export.
Integrated circuit (IC) 200 transmits at least one road shift LD signal to the signal input part of on-off circuit 300, optionally, this shift LD signal at least comprises the one in display panel input signal (STV), display panel scanning sequence signal (CKV), display panel data switch signal (CKH), display panel forward scan signal (U2D), display panel reverse scan signal (D2U), display panel reset signal (GRESET), but is not limited thereto.Display panel input signal (STV) is for driving the gate driver circuit of display panel 400, display panel scanning sequence signal (CKV) is for driving the sweep trace of display panel 400, display panel data switch signal (CKH) is for driving the data line of display panel 400, display panel forward scan signal (U2D) scans from top to bottom successively for driving the sweep trace of display panel 400, display panel reverse scan signal (D2U) scans from top to bottom successively for driving the sweep trace of display panel 400, display panel reset signal (GRESET) is for driving the circuit reset of display panel 400.
It should be noted that, if when integrated circuit (IC) 200 is only the transposition of partial registration signal needed for display panel 400 to the shift LD signal that the signal input part of on-off circuit 300 transmits, so for the remaining shift LD signal not passing through hardware circuit on-off circuit 300 and transmit, this transposition of partial registration signal is directly transferred to display panel 400 by integrated circuit (IC) 200.Concrete, for remaining not by the shift LD signal that hardware circuit on-off circuit 300 transmits, be provided with controling parameters in integrated circuit (IC) 200, whether export display panel 400 to for controlling this transposition of partial registration signal.
The driving circuit for display panel 400 that the embodiment of the present invention provides, by conducting and the disconnection of control circuit 100 gauge tap circuit 300, shift LD signal is transmitted to on-off circuit 300 by integrated circuit (IC) 200, on-off circuit 300 is under the control of control circuit 100 during conducting, then on-off circuit 300 by receive at least one road shift LD Signal transmissions to display panel 400, to drive display panel 400.The present invention controls the output of shift LD signal by the control circuit 100 of hardware and on-off circuit 300, do not need in integrated circuit (IC) 200, to arrange controling parameters to control the output of each road shift LD signal, therefore simple by the process that hardware mode controls.
Shown in figure 2a, it is the schematic diagram of a kind of driving circuit for display panel that another embodiment of the present invention provides.The technical scheme of the embodiment of the present invention is applicable to control by hardware circuit the situation that display panel receives shift LD control signal.As shown in Figure 2 a, this driving circuit being used for display panel 400 comprises: control circuit 100, on-off circuit 300 and integrated circuit 200.
Wherein, the control input end of the output terminal connecting valve circuit 300 of control circuit 100, for on-off circuit 300 transmission of control signals, with being turned on or off of gauge tap circuit 300; The signal input part of the output terminal connecting valve circuit 300 of integrated circuit 200, for transmitting at least one road shift LD signal to on-off circuit 300; The output terminal of on-off circuit 300 connects display panel 400, for when circuit 300 conducting of control signal gauge tap, the output terminal of on-off circuit 300 by least one road shift LD Signal transmissions to display panel 400, to drive display panel 400.
On-off circuit 300 is set and comprises at least one first switch 310, each first switch 310 corresponding road shift LD signal respectively, multiple first switch 310 transmits with multichannel shift LD signal one_to_one corresponding, and multiple first switch 310 also transmits with control signal one_to_one corresponding.The signal input part of the first switch 310 is connected with integrated circuit (IC) 200, the road shift LD signal that receiving integrate circuit IC200 transmits; The control input end of the first switch 310 is connected with control circuit 100, reception control circuit 100 transmit for controlling the control signal whether this shift LD signal exports; The output terminal of the first switch 310 is connected with display panel 400.Control circuit 100 controls each first switch 310 respectively and is turned on or off, when control circuit 100 controls at least one first switch 310 conducting, the shift LD Signal transmissions that signal input part receives by least one first switch 310 to display panel 400, with according to shift LD signal drive display panel 400.
First switch 310 is optionally set and comprises the first transistor, its reason is, transistor is as a kind of variable power switch, based on the electric current that the Control of Voltage of input exports, therefore transistor can as the switch of electric current, and the advantage of transistor electric signal can be utilized to control and very fast, the in vitro switch speed of switching speed can reach more than 100GHz compared with mechanical switch.The output terminal of the control input end connection control circuit 100 of the first transistor, for receiving the control signal controlling this first transistor conducting or closedown, the signal input part of the first transistor connects the output terminal of integrated circuit (IC) 200, for receiving should a road shift LD signal of the first transistor, the output terminal of the first transistor connects display panel 400, during for controlling this first transistor conducting when control signal, the road shift LD Signal transmissions received by the signal input part of the first transistor is to display panel 400.Preferably arranging the first transistor is P-type crystal pipe.The control signal that control circuit 100 exports may control at least one the first transistor conducting in multiple the first transistor.
As mentioned above, for any one the first switch 310, when first switch 310 is set for P type the first transistor, when so the control signal of this P type the first transistor of control of control circuit 100 output is high-level control signal, this high-level control signal can control this P type the first transistor and disconnect, and the output terminal of P type the first transistor is unsettled, do not output signal; When the control signal of this P-type crystal pipe of control that control circuit 100 exports is low level control signal, this high-level control signal can control this P type the first transistor conducting.When the first transistor conducting of P type, the road shift LD Signal transmissions that signal input part receives by this P type the first transistor to display panel 400 to drive display panel 400.
As shown in the figure, be road display panel input signal (STV) for integrated circuit (IC) 200 to the shift LD signal that on-off circuit 300 exports, the output terminal that integrated circuit (IC) 200 exports STV connects with the signal input part of corresponding first switch 310, the STV signal that this first switch 310 receiving integrate circuit IC200 exports, the output terminal that control circuit 100 exports STV control signal is connected with the control input end of this first switch 310, the STV control signal that this first switch 310 reception control circuit 100 exports, the input end that display panel 400 receives STV signal is connected with the output terminal of this first switch 310.Whether the STV control signal that control circuit 100 exports exports display panel 400 to for control STV signal, particularly control circuit 100 is provided with the control mode of STV control signal, control circuit 100 exports STV control signal according to this control mode, first switch 310 is turned on or off according to STV control signal, when the first switch 310 conducting, first switch 310 by STV Signal transmissions to display panel 400, to drive the gate driver circuit of display panel 400.It can thus be appreciated that, be provided with the control mode of at least one road shift LD signal in control circuit 100, and at least one first switch 310 corresponding according to the control of this control mode is turned on or off, to drive display panel 400.
It should be noted that, integrated circuit (IC) 200 is only display panel input signal needed for display panel 400 to the shift LD signal that the signal input part of on-off circuit 300 transmits as shown in Figure 2 a, so for remaining CKV, CKH, U2D, D2U, GRESET signal, this transposition of partial registration signal is directly transferred to display panel 400 by integrated circuit (IC) 200.Concrete, for remaining not by the shift LD signal that hardware circuit on-off circuit 300 transmits, be provided with controling parameters in integrated circuit (IC) 200, whether export display panel 400 to for controlling this transposition of partial registration signal.
It should be noted that, the schematic diagram of the driving circuit for display panel as shown in Figure 2 a, on-off circuit 300 is only to be provided with first switch 310, namely be only that a road signal (display panel input STV) is illustrated for integrated circuit (IC) 200 to the shift LD signal that on-off circuit 300 exports, but be not limited thereto, multiple first switch 310 can be set as required, and the shift LD signal that the integrated circuit (IC) 200 corresponding with multiple first switch 310 exports to on-off circuit 300, do not repeat one by one at this.
On the basis of technique scheme, preferably can also arrange the first transistor is N-type transistor, when the control signal that then control circuit 100 exports is high-level control signal, control circuit 100 controls the conducting of N-type the first transistor, when the control signal that control circuit 100 exports is low level control signal, control circuit 100 controls N-type the first transistor and disconnects.When the conducting of N-type the first transistor, the road shift LD Signal transmissions that signal input part receives by this transistor to display panel 400 to drive display panel 400.
Shown in figure 2b, it is another schematic diagram for the driving circuit of display panel that the embodiment of the present invention provides.The technical scheme of the embodiment of the present invention is applicable to control by hardware circuit the situation that display panel receives shift LD control signal.As shown in the figure, this driving circuit being used for display panel comprises: control circuit 100, on-off circuit 300 and integrated circuit 200.
Wherein, the control input end of the output terminal connecting valve circuit 300 of control circuit 100, for on-off circuit 300 transmission of control signals, with being turned on or off of gauge tap circuit 300; The signal input part of the output terminal connecting valve circuit 300 of integrated circuit 200, for transmitting at least one road shift LD signal to on-off circuit 300; The output terminal of on-off circuit 300 connects display panel 400, for when circuit 300 conducting of control signal gauge tap, the output terminal of on-off circuit 300 by least one road shift LD Signal transmissions to display panel 400, to drive display panel 400.
Arrange on-off circuit 300 and comprise at least one group of switch, often organize Switch Controller and answer a road shift LD signal, any one group of switch comprises second switch 321 and one the 3rd switch 322.For any one group of switch, the signal input part of one group of switch connects integrated circuit (IC) 200 and receives a road shift LD signal, multichannel shift LD signal with organize switch one_to_one corresponding more and arrange, the control input end connection control circuit 100 of one group of switch and receive a control signal, whether the control signal that control circuit 100 exports is exported by on-off circuit 300 for controlling corresponding shift LD signal, and the output terminal of one group of switch connects display panel 400 and transmits shift LD signal to display panel 400.
Second switch 321 is optionally set and the 3rd switch 322 is N-type transistor.For any one group of switch, the output terminal of the control input end of second switch 321 and the control input end difference connection control circuit 100 of the 3rd switch 322, for receiving same control signal, signal input part and the signal input part of the 3rd switch 322 of second switch 321 are connected the output terminal of integrated circuit (IC) 200 respectively, for receiving same road shift LD signal, the output terminal of second switch 321, the output terminal of the 3rd switch 322 connect display panel 400 respectively, drive display panel 400 with same road shift LD signal.
The control signal that control circuit 100 exports controls second switch 321 and the conducting simultaneously of the 3rd switch 322 in one group of switch or ends simultaneously, when control signal controls second switch 321 in one group of switch and the conducting simultaneously of the 3rd switch 322, this second switch 321 and the 3rd switch 322 by the same road shift LD Signal transmissions that receives to display panel 400.Concrete, the control signal of control one group of switch that this control circuit 100 exports is control the control signal whether shift LD signal that this group switch receives exports display panel 400 to, and for difference group switch, control circuit 100 exports corresponding control signal.
Concrete, for any one group of switch, control circuit 100 is to organizing switch, the control signal exported is high-level control signal or low level control signal, when the control signal of this group switch of control that control circuit 100 exports is high-level control signal, this high-level control signal controls second switch 321 in this group switch and the conducting simultaneously of the 3rd switch 322, this group switch by the road shift LD Signal transmissions that receives to display panel 400; When the control signal of this group switch of control that control circuit 100 exports is low level control signal, this low level control signal controls second switch 321 in this group switch and the 3rd switch 322 disconnects simultaneously, and the output terminal of this group switch is unsettled, do not export shift LD signal.The switch that control circuit 100 controls different group respectively exports shift LD signal.
For the embodiment that Fig. 2 b provides, comprise two groups of switches with on-off circuit 300, second group of switch of the first group of switch and output display panel data switching signal (CKH) that are respectively output display panel scan clock signal (CKV) is that example is described.For first group of switch, the output terminal that its second switch 321 all exports CKV with integrated circuit (IC) 200 with the signal input part of the 3rd switch 322 is connected, the output terminal that its second switch 321 all exports CKV control signal with control signal with the control input end of the 3rd switch 322 is connected, and the sweep trace that its second switch 321 all receives CKV control signal with display panel 400 with the output terminal of the 3rd switch 322 is connected.For second group of switch, the output terminal that its second switch 321 all exports CKH with integrated circuit (IC) 200 with the signal input part of the 3rd switch 322 is connected, the output terminal that its second switch 321 all exports CKH control signal with control signal with the control input end of the 3rd switch 322 is connected, and the data line that its second switch 321 all receives CKH control signal with display panel 400 with the output terminal of the 3rd switch 322 is connected.
It can thus be appreciated that, the control signal of gated sweep line sequential and the control signal of control data wiretap is provided with in control circuit 100, sweep trace timing control signal is transferred to first group of switch by control circuit 100, and control the whether conducting of first group of switch, and/or data line switch control signal is transferred to second group of switch, and control the whether conducting of second group of switch.When first group of switch and/or second group of switch conduction, display panel 400 receives the corresponding clock signal of first group of switch and/or second group of switch transmission.
It should be noted that, as shown in Figure 2 b for remaining STV, U2D, D2U, GRESET signal, this transposition of partial registration signal is directly transferred to display panel 400 by integrated circuit (IC) 200.Concrete, for remaining not by the shift LD signal that hardware circuit on-off circuit 300 transmits, be provided with controling parameters in integrated circuit (IC) 200, whether export display panel 400 to for controlling this transposition of partial registration signal.
On the basis of technique scheme, second switch 321 preferably can also be set and the 3rd switch 322 is P-type crystal pipe.When the control signal that control circuit 100 exports is low level control signal, this low level control signal controls second switch 321 in one group of switch and the conducting simultaneously of the 3rd switch 322, this group switch by the road shift LD Signal transmissions that receives to display panel 400; When the control signal that control circuit 100 exports is high-level control signal, this high-level control signal controls second switch 321 in one group of switch and the 3rd switch 322 disconnects simultaneously, and the output terminal of this group switch is unsettled, do not export shift LD signal.
It should be noted that, the schematic diagram of the driving circuit for display panel as shown in Figure 2 b, on-off circuit 300 is only to be provided with two groups of switches, second group of switch of the first group of switch and output display panel data switching signal (CKH) that are namely respectively output display panel scan clock signal (CKV) is that example is described, but be not limited thereto, can arrange as required and organize switch more, and with the corresponding integrated circuit (IC) of switch 200 of organizing to the shift LD signal organized switch and export, do not repeat one by one at this more more.
Shown in figure 2c, it is another schematic diagram for the driving circuit of display panel that the embodiment of the present invention provides.The technical scheme of the embodiment of the present invention is applicable to control by hardware circuit the situation that display panel receives shift LD control signal.As shown in the figure, this driving circuit being used for display panel comprises: control circuit 100, on-off circuit 300 and integrated circuit 200.
Wherein, the control input end of the output terminal connecting valve circuit 300 of control circuit 100, for on-off circuit 300 transmission of control signals, with being turned on or off of gauge tap circuit 300; The signal input part of the output terminal connecting valve circuit 300 of integrated circuit (IC) 200, for transmitting at least one road shift LD signal to on-off circuit 300; The output terminal of on-off circuit 300 connects display panel 400, for when circuit 300 conducting of control signal gauge tap, the output terminal of on-off circuit 300 by least one road shift LD Signal transmissions to display panel 400, to drive display panel 400.
Arrange on-off circuit 300 and comprise at least one group of switch 330, often organize Switch Controller and answer a road shift LD signal, any one group of switch 330 comprises one the 4th switch 331 and one the 5th switch 332.Optionally, for any one group of switch, the 4th switch 331 is N-type transistor, and the 5th switch 332 comprises a phase inverter and P-type crystal pipe.For any one group of switch, the output terminal of the phase inverter of the 5th switch 332 is connected with the control input end of the transistor of the 5th switch 332, the control input end of the 4th switch 331, the output terminal of the input end difference connection control circuit 100 of the phase inverter of the 5th switch 332, for receiving same control signal, the signal input part of the 4th switch 331, the signal input part of the transistor of the 5th switch 332 connects the output terminal of integrated circuit 200 respectively, for receiving same road shift LD signal, the output terminal of the 4th switch 331, the output terminal of the transistor of the 5th switch 332 connects display panel 400 respectively, display panel 400 is driven with same road shift LD signal.
The control signal that control circuit 100 exports controls the 4th switch 331 and the conducting simultaneously of the 5th switch 332 in one group of switch or ends simultaneously, when control signal controls the 4th switch 331 in one group of switch and the conducting simultaneously of the 5th switch 332, the 4th switch 331 and the 5th switch 332 simultaneously by the road shift LD Signal transmissions that receives to display panel 400.
Concrete, the control signal that control circuit 100 exports is high-level control signal or low level control signal, when the control signal that control circuit 100 exports is high-level control signal, this high-level control signal controls the 4th switch 331 in one group of switch and the conducting simultaneously of the 5th switch 332, this group switch by the road shift LD Signal transmissions that receives to display panel 400; When the control signal that control circuit 100 exports is low level control signal, this low level control signal controls the 4th switch 331 in one group of switch and the 5th switch 332 disconnects simultaneously, and the output terminal of this group switch is unsettled, do not export shift LD signal.
As mentioned above, increase on-off circuit 300 in the driving circuit, by control circuit 100 gauge tap circuit 300, control the output of corresponding displaced registration signal with the high and low level of the control signal by each shift LD signal.
At least six group switches are comprised with on-off circuit 300, comprise the first group of switch exporting STV respectively, for being driven the gate driver circuit of display panel 400 by on-off circuit 300, also comprise the second group of switch exporting CKV, for controlling the sweep trace sequential of display panel 400, also comprise the 3rd group of switch exporting CKH, for controlling the data line switch of display panel 400, also comprise the 4th group of switch exporting U2D, for controlling sweep trace sequential from top to bottom, also comprise the 5th group of switch exporting D2U, for controlling sweep trace sequential from top to bottom, and also comprise the 6th group of switch exporting GRESET, for the circuit of the display panel 400 that resets.The signal input part corresponding same road shift LD signal of each group switch, corresponding same road, the control input end control signal of each group switch, the same input end of the corresponding display panel 400 of output terminal of each group switch.
On the basis of technique scheme, preferably can also arrange the 4th switch 331 is P-type crystal pipe, and the 5th switch 332 comprises a phase inverter and N-type transistor.When the control signal that control circuit 100 exports is low level control signal, this low level control signal controls the 4th switch 331 in one group of switch and the conducting simultaneously of the 5th switch 332, this group switch by the road shift LD Signal transmissions that receives to display panel 400; When the control signal that control circuit 100 exports is high-level control signal, this high-level control signal controls the 4th switch 331 in one group of switch and the 5th switch 332 disconnects simultaneously, and this group switch is unsettled, do not export shift LD signal.
It should be noted that, for the schematic diagram of the driving circuit for display panel shown in Fig. 3, on-off circuit 300 is described to be provided with six groups of switches, but be not limited thereto, many groups switch of any amount can be set as required, and with the corresponding integrated circuit (IC) of switch 200 of organizing to the shift LD signal organized switch and export, do not repeat one by one at this more more.
Shown in figure 3, it is the schematic diagram of a kind of driving circuit for display panel that the embodiment of the present invention provides.The technical scheme of the embodiment of the present invention is applicable to control by hardware circuit the situation that display panel receives shift LD control signal.As shown in the figure, this driving circuit being used for display panel comprises: control circuit 100, on-off circuit 300 and integrated circuit 200.
Wherein, the control input end of the output terminal connecting valve circuit 300 of control circuit 100, for on-off circuit 300 transmission of control signals, with being turned on or off of gauge tap circuit 300; The signal input part of the output terminal connecting valve circuit 300 of integrated circuit 200, for transmitting at least one road shift LD signal to on-off circuit 300; The output terminal of on-off circuit 300 connects display panel 400, for when circuit 300 conducting of control signal gauge tap, the output terminal of on-off circuit 300 by least one road shift LD Signal transmissions to display panel 400, to drive display panel 400.
Whether the road shift LD signal that known control circuit 100 controls each group switch reception respectively exports display panel 400 to, therefore one group of corresponding with each road shift LD signal switch, control circuit 100 can export corresponding control signal to control being turned on or off of this group switch, exports the road shift LD signal received to display panel 400 to make this group switch when conducting.It can thus be appreciated that preferably arrange the first resistance R1 and the second resistance R2 that control circuit 100 comprises at least one group of parallel connection, whether the first resistance R1 and the second resistance R2 of this group of parallel connection are used for being connected with one group of switch, export for controlling a road shift LD signal.
Wherein, the first end electrical connection high level signal end VGH of the first resistance R1, the control input end of the second end electrical connection on-off circuit 300, the first end electrical connection low level signal end VGL of the second resistance R2, the control input end of the second end electrical connection on-off circuit 300.When the first resistance R1 short circuit, the second resistance R2 open circuit, control circuit 100 is to the control signal of the control input end transmission high level of on-off circuit 300; When the first resistance R1 open circuit, the second resistance R2 short circuit, control circuit 100 transmits low level control signal to the control input end of on-off circuit 300.
Preferably arrange on-off circuit 300 and comprise at least one group of switch, often organize Switch Controller and answer a road shift LD signal, any one group of switch comprises one the 4th switch 331 and one the 5th switch 332.Optional for any one group of switch, the 4th switch 331 is N-type transistor, and the 5th switch 332 comprises a phase inverter and P-type crystal pipe.For any one group of switch, the output terminal of the phase inverter of the 5th switch 332 is connected with the control input end of the transistor of the 5th switch 332, the control input end of the 4th switch 331, the output terminal of the input end difference connection control circuit 100 of the phase inverter of the 5th switch 332, for receiving same control signal, the signal input part of the 4th switch 331, the signal input part of the transistor of the 5th switch 332 connects the output terminal of integrated circuit 200 respectively, for receiving same road shift LD signal, the output terminal of the 4th switch 331, the output terminal of the transistor of the 5th switch 332 connects display panel 400 respectively, display panel 400 is driven with same road shift LD signal.On-off circuit 300 can also be set to other forms, does not do too much example at this.
For a road shift LD signal and one group of corresponding switch and corresponding control signal, when the first resistance R1 short circuit, the second resistance R2 open circuit of correspondence, control circuit 100 all transmits the control signal of high level to the 4th switch 331 of this group switch and the control input end of the 5th switch 332,4th switch 331 of this group switch and the conducting simultaneously of the 5th switch 332, so the output terminal of the 4th switch 331 and the 5th switch 332 all exports a road shift LD signal of reception.When the first resistance R1 open circuit, the second resistance R2 short circuit of correspondence, control circuit 100 transmits low level control signal to the 4th switch 331 of this group switch and the control input end of the 5th switch 332,4th switch 331 and the 5th switch 332 of this group switch disconnect simultaneously, and the output terminal of the 4th switch 331 output terminal that is unsettled, the 5th switch 332 is unsettled.Control circuit 100 is achieved by the first resistance R1 of any one group of parallel connection and the second resistance R2 and controls the output of a corresponding road shift LD signal thus.
As mentioned above, need as conduction resistance application due to the first resistance R1 and the second resistance R2 and can not change the high and low of output terminal level, therefore the resistance of the first resistance R1 and the second resistance R2 is all close to 0 Ω.
The embodiment of the present invention also provides a kind of display device, and this display device comprises any one driving circuit as above described in embodiment.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (12)
1. for a driving circuit for display panel, it is characterized in that, comprising: control circuit, on-off circuit and integrated circuit, wherein:
The output terminal of described control circuit connects the control input end of described on-off circuit, for described on-off circuit transmission of control signals, to control being turned on or off of described on-off circuit;
The output terminal of described integrated circuit connects the signal input part of described on-off circuit, for transmitting at least one road shift LD signal to described on-off circuit;
The output terminal of described on-off circuit connects described display panel, and for when described control signal controls described on-off circuit conducting, the output terminal of described on-off circuit is by the extremely described display panel of shift LD Signal transmissions described at least one road.
2. driving circuit according to claim 1, is characterized in that, described control circuit is flexible print circuit board.
3. driving circuit according to claim 1, it is characterized in that, described shift LD signal at least comprises the one in display panel input signal, display panel scanning sequence signal, display panel data switch signal, display panel forward scan signal, display panel reverse scan signal, display panel reset signal.
4. driving circuit according to claim 3, is characterized in that, described on-off circuit comprises at least one first switch, each described first switch shift LD signal described in a corresponding road respectively.
5. driving circuit according to claim 4, is characterized in that, described first switch comprises the first transistor;
The control input end of described the first transistor connects the output terminal of described control circuit, for receiving described control signal, the signal input part of described the first transistor connects the output terminal of described integrated circuit, for receiving shift LD signal described in a road, the output terminal of described the first transistor connects described display panel, for when described control signal controls described the first transistor conducting, described in the road receive the signal input part of described the first transistor, shift LD Signal transmissions is to described display panel.
6. driving circuit according to claim 5, is characterized in that, described the first transistor is P-type crystal pipe; Or described the first transistor is N-type transistor.
7. driving circuit according to claim 3, is characterized in that, described on-off circuit comprises at least one group of switch, often organizes described Switch Controller and answers shift LD signal described in a road, and switch described in any a group comprises a second switch and one the 3rd switch.
8. driving circuit according to claim 7, is characterized in that, described second switch and described 3rd switch are N-type transistor; Or described second switch and described 3rd switch are P-type crystal pipe; For switch described in any a group,
The control input end of described second switch, the control input end of described 3rd switch connect the output terminal of described control circuit respectively, for receiving described control signal, the signal input part of described second switch, the signal input part of described 3rd switch connect the output terminal of described integrated circuit respectively, for receiving shift LD signal described in a road, the output terminal of described second switch, the output terminal of described 3rd switch connect described display panel respectively;
The described control signal that described control circuit exports controls described second switch and the conducting simultaneously of the 3rd switch in one group of switch or ends simultaneously, when described control signal controls described second switch in one group of switch and described 3rd switch conducting simultaneously, this second switch and the 3rd switch simultaneously by shift LD Signal transmissions described in the road that receives to described display panel.
9. driving circuit according to claim 3, is characterized in that, described on-off circuit comprises at least one group of switch, often organizes described Switch Controller and answers shift LD signal described in a road, and switch described in any a group comprises one the 4th switch and one the 5th switch.
10. driving circuit according to claim 9, is characterized in that, for switch described in any a group, described 4th switch is N-type transistor, and described 5th switch comprises a phase inverter and P-type crystal pipe; Or described 4th switch is P-type crystal pipe, described 5th switch comprises a phase inverter and N-type transistor;
For switch described in any a group, the output terminal of the phase inverter of described 5th switch is connected with the control input end of the transistor of described 5th switch,
The input end of the control input end of described 4th switch, the phase inverter of described 5th switch connects the output terminal of described control circuit respectively, for receiving described control signal, the signal input part of the signal input part of described 4th switch, the transistor of described 5th switch connects the output terminal of described integrated circuit respectively, for receiving shift LD signal described in a road, the output terminal of the output terminal of described 4th switch, the transistor of described 5th switch connects described display panel respectively;
The described control signal that described control circuit exports controls described 4th switch and the conducting simultaneously of the 5th switch in one group of switch or ends simultaneously, when described control signal controls described 4th switch in one group of switch and described 5th switch conducting simultaneously, the 4th switch and the 5th switch simultaneously by shift LD Signal transmissions described in the road that receives to described display panel.
11. driving circuits according to any one of claim 1-10, is characterized in that, described control circuit comprises the first resistance in parallel and the second resistance;
The first end electrical connection high level signal end of described first resistance, the second end are electrically connected the control input end of described on-off circuit, and the first end electrical connection low level signal end of described second resistance, the second end are electrically connected the control input end of described on-off circuit;
When described first resistive short, described second resistance interruption, described control circuit is to the control signal of the control input end transmission high level of described on-off circuit;
When described first resistance interruption, described second resistive short, described control circuit transmits low level control signal to the control input end of described on-off circuit.
12. 1 kinds of display device, is characterized in that, comprise the driving circuit as described in any one of claim 1-11.
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