CN203204996U - Frame scanning pixel display driving unit and display device thereof - Google Patents
Frame scanning pixel display driving unit and display device thereof Download PDFInfo
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- CN203204996U CN203204996U CN 201320229382 CN201320229382U CN203204996U CN 203204996 U CN203204996 U CN 203204996U CN 201320229382 CN201320229382 CN 201320229382 CN 201320229382 U CN201320229382 U CN 201320229382U CN 203204996 U CN203204996 U CN 203204996U
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Abstract
The utility model provides a frame scanning pixel display driving unit and a display device thereof. The frame scanning pixel display driving unit includes a driving transistor used for driving pixel display. The frame scanning pixel display driving unit also includes a driving control module used for controlling the driving transistor for driving pixel display according to a first frame data signal. The driving control module is connected with a data write-in module and receives the first frame data signal from the data write-in module. The frame scanning pixel display driving unit also includes the data write-in module used for receiving and locking a second frame data signals when the driving transistor drives pixel display according to the first frame data signal and transmitting the second frame data signal to the driving control module after the display of the first frame data signal is finished. The second frame data signal is the next frame data signal of the first frame data signal. According to the utility model, the frame scanning pixel display driving unit employs a frame scanning display method, so that power consumption in a signal write-in stage can be reduced and the power consumption of panel display is reduced effectively.
Description
Technical field
The utility model relates to the display fabrication techniques field, refers in particular to a kind of frame scan pixel display driver unit and display device thereof.
Background technology
Current, in the display technique field, usually adopt the line sweep mode to realize Display panel, but this kind scanning display mode is so that made power consumption for displays is high and have the problem that shows flicker, therefore in the liquid crystal display of prior art, a kind of brand-new frame scan control mode occurred and realized showing.
Yet, current this kind adopts the liquid crystal display investigative technique of frame scan control mode still immature, there are the defectives such as complex structure, for example owing to writing fashionable at signal, the luminous thin film transistor (TFT) of control pixel is in closed condition always, therefore luminescent device can not be luminous, only have after all signals all write in this hardwood, this thin film transistor (TFT) is just opened, and every frame most of the time all consumes in the signal write phase, therefore be actually used in the luminous time seldom, affect Display panel and power-dissipation-reduced remarkable not.
The utility model content
The purpose of technical solutions of the utility model provides a kind of frame scan pixel display driver unit and display device thereof, forms the frame scan display mode, and can be reduced in the power consumption of signal write phase, thereby effectively reduces the power consumption of Display panel.
The utility model provides a kind of frame scan pixel display driver unit, comprises the driving transistors that shows for driving pixel, wherein, also comprises:
Be used for controlling described driving transistors and drive the drive control module that pixel shows according to the first frame data signals, described drive control module is connected with described data writing module, receives described the first frame data signals from described data writing module;
Be used for when described driving transistors drives the pixel demonstration according to described the first frame data signals, described data writing module receives and latchs the second frame data signals, and after the demonstration of described the first frame data signals finishes, send the data writing module of described the second frame data signals to described drive control module.
Wherein, described the second frame data signals next frame data-signal that is described the first frame data signals.
Preferably, frame scan pixel display driver unit described above, described drive control module comprises:
Be used for receiving described the second frame data signals from described data writing module, and the first light emitting control submodule of conducting between the grid that makes described driving transistors after the described pixel demonstration end and drain electrode, described the first light emitting control submodule is connected with described data writing module; After the conducting, described driving transistors is in the diode connected mode between the grid of wherein said driving transistors and the drain electrode;
Be used for when described driving transistors drives the pixel demonstration, make conducting between described driving transistors and the luminescent device, after described pixel shows end, make the second light emitting control submodule that disconnects between described driving transistors and the luminescent device, described the second light emitting control submodule is arranged between described driving transistors and the described luminescent device;
Be used for when described driving transistors drives the pixel demonstration, for source electrode and the grid of described driving transistors provides the voltage signal that can make described driving transistors conducting, when described pixel shows end, make source electrode and the grid of described driving transistors regulate submodule with first of described voltage signal disconnection respectively, described first two output terminals regulating submodule are connected with grid with the source electrode of described driving transistors respectively;
Be used for working as described data writing module before described the second frame data signals is sent to described the first light emitting control submodule, what make that the current potential of the connected node between described data writing module and described the first light emitting control submodule dragged down second regulates submodule, and the described second output terminal of regulating submodule is connected with described connected node.
Preferably, frame scan pixel display driver unit described above, described first regulates submodule responds the first control signal, and described the first light emitting control submodule enters and drives described driving transistors carries out the pixel demonstration according to described the first frame data signals phase one; Described data writing module responds the 4th control signal, enters the described phase one, receives and latch described the second frame data signals; Described the second light emitting control submodule responds described the first control signal, enters the described phase one, conducting between described driving transistors and the luminescent device;
Described second regulates submodule responds the 3rd control signal, enters the subordinate phase that the current potential that makes the connected node between described data writing module and described the first light emitting control submodule is dragged down;
Described data writing module responds the second control signal, enters the phase III that sends described the second frame data signals to described drive control module; And described the first light emitting control submodule responds described the second control submodule, enter the described phase III, disconnect between the grid of described driving transistors and the drain electrode, and described first regulates submodule responds described the second control signal, and the source electrode of described driving transistors and grid disconnect with the voltage signal that can drive described driving transistors respectively.
Preferably, frame scan pixel display driver unit described above, described the first light emitting control submodule specifically comprises:
The first electric capacity, the first end of described the first electric capacity is connected with the grid of described driving transistors, and the second end of described the first electric capacity is connected with the output terminal of described data writing module;
The second switch transistor, the transistorized grid of described second switch is connected with described the second control signal, the transistorized source electrode of described second switch is connected with the grid of described driving transistors, and the transistorized drain electrode of described second switch is connected with the drain electrode of described driving transistors.
Preferably, frame scan pixel display driver unit described above, described the second light emitting control submodule specifically comprises: the 3rd switching transistor, the grid of described the 3rd switching transistor is connected with the first control signal, the source electrode of described the 3rd switching transistor is connected with the drain electrode of described driving transistors, the drain electrode of described the 3rd switching transistor is connected with luminescent device, and an end of wherein said luminescent device is connected with one first voltage signal end.
Preferably, frame scan pixel display driver unit described above, described data writing module specifically comprises:
The 5th switching transistor, the grid of described the 5th switching transistor is connected with described the second control signal, and the drain electrode of described the 5th switching transistor is connected with described the first light emitting control submodule as the output terminal of described data writing module;
The second electric capacity, the first end of described the second electric capacity is connected with the source electrode of described the 5th switching transistor, and the second end is connected with described tertiary voltage signal end;
The 4th switching transistor, the grid of described the 4th switching transistor is connected with described the 4th control signal, the source electrode of described the 4th switching transistor is connected with the data-signal end, and the drain electrode of described the 4th switching transistor is connected with public connecting end A between described the second electric capacity and described the 5th switching transistor.
Preferably, frame scan pixel display driver unit described above, described first regulates submodule specifically comprises:
The 6th switching transistor, the source electrode of described the 6th switching transistor is connected with a tertiary voltage signal end, the drain electrode of described the 6th switching transistor is connected with the source electrode of described driving transistors, and the grid of described the 6th switching transistor is connected with described the second control signal;
Minion is closed transistor, described minion is closed transistorized source electrode and is connected with a second voltage signal end, described minion is closed transistorized drain electrode and is connected with the drain electrode of described the 6th switching transistor, and described minion is closed transistorized grid and is connected with described the first control signal;
The 8th switch transistor, the transistorized source electrode of described the 8th switch is connected with described second voltage signal end, the transistorized drain electrode of described the 8th switch is connected with public connecting end B between described data writing module and described the first light emitting control submodule, and the transistorized grid of described the 8th switch is connected with described the first control signal.
Preferably, frame scan pixel display driver unit described above, described second regulates submodule specifically comprises:
The 9th switching transistor, the source electrode of described the 9th switching transistor is connected with described tertiary voltage signal end, the drain electrode of described the 9th switching transistor is connected with the output terminal of described data writing module, and the grid of described the 9th switching transistor is connected with described the 3rd control signal.
Preferably, frame scan pixel display driver unit described above, described the 4th control signal is scanning gate signal, after the described phase one of every delegation pixel cell is all complete, enters described subordinate phase.
Preferably, frame scan pixel display driver unit described above, described first regulates submodule and described the second adjusting, and submodule is corresponding is connected with a row pixel cell.
Preferably, frame scan pixel display driver unit described above, described tertiary voltage signal end grounding connection.
Preferably, frame scan pixel display driver unit described above, in the described phase one, described the first control signal and described the 4th control signal are low level, and described the second control signal and described the 3rd control signal are high level; In described subordinate phase, described the 3rd control signal is low level, and described the first control signal, described the second control signal and described the 4th control signal are high level; In the described phase III, described the first control signal, described the 3rd control signal and described the 4th control signal are high level, and described the second control signal is low level.
The utility model also provides a kind of display device, comprises aforesaid frame scan pixel display driver unit.
In the utility model specific embodiment technique scheme at least one has following beneficial effect:
By described frame scan pixel display driver unit, display pixel is when frame data show on receiving, be in the ablation process of next frame signal, so that the fluorescent lifetime of luminescent device promotes greatly, display effect is improved, reduce simultaneously display device in the power consumption of signal write phase, thereby effectively reduce the power consumption of Display panel; Can also realize V on the other hand
THAnd V
DDThe compensate function of the IR Drop of power voltage drop further improves display effect.
Description of drawings
Fig. 1 represents the schematic diagram of the described frame scan pixel of the utility model specific embodiment display driver unit;
Fig. 2 represents the structural drawing of the described frame scan pixel of the utility model specific embodiment display driver unit;
Fig. 3 represents the sequential chart of the described frame scan pixel of the utility model specific embodiment display driver unit;
Fig. 4 represents to adopt the luminous sequential chart of the described frame scan pixel of the utility model specific embodiment display driver unit.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawings and the specific embodiments the utility model is described in detail.
The described frame scan pixel of the utility model specific embodiment display driver unit comprises the driving transistors, data writing module and the drive control module that show for driving pixel, wherein:
Described drive control module is used for: receive the first frame data signals that described data writing module is sent, and control described driving transistors according to the demonstration of described the first frame data signals driving pixel;
Described data writing module is used for: when described driving transistors drives the pixel demonstration according to described the first frame data signals, described data writing module receives and latchs the second frame data signals, and after the demonstration of described the first frame data signals finishes, send described the second frame data signals to described drive control module;
Wherein, described the second frame data signals next frame data-signal that is described the first frame data signals.
In the present embodiment, describe as an example of the light-emitting diode pixel display driver circuit example, but the utility model is not limited only to the display device of this type, display device with pixel display driver unit, all can utilize technical scheme provided by the utility model to solve the problems of the technologies described above, reach described technique effect.
Fig. 1 is the principle schematic of the described frame scan display circuit of the utility model specific embodiment.As shown in Figure 1, described drive control module specifically comprises:
The first light emitting control submodule is used for receiving described the second frame data signals from described data writing module; And described pixel show finish after, the grid that makes described driving transistors with drain between conducting, described driving transistors is in the diode connected mode;
The second light emitting control submodule is used for making conducting between described driving transistors and the luminescent device when described driving transistors drives the pixel demonstration; After described pixel shows end, make between described driving transistors and the luminescent device to disconnect;
First regulates submodule, is used for when described driving transistors drives the pixel demonstration, for source electrode and the grid of described driving transistors provides the voltage signal that can make described driving transistors conducting; When described pixel shows end, the source electrode of described driving transistors and grid are disconnected respectively with described voltage signal;
Second regulates submodule, be used for working as described data writing module before described the second frame data signals is sent to described the first light emitting control submodule, the current potential of the connected node between described data writing module and described the first light emitting control submodule is dragged down, prepare for described the second frame data signals transfers to described the first light emitting control submodule.
Wherein, described first regulates submodule responds the first control signal, described the first light emitting control submodule is entered drive described driving transistors carries out the pixel demonstration according to described the first frame data signals phase one; Described data writing module responds the 4th control signal, enters the described phase one, receives and latch described the second frame data signals; Described the second light emitting control submodule responds described the first control signal, enters the described phase one, makes conducting between described driving transistors and the luminescent device;
Described second regulates submodule responds the 3rd control signal, enters the subordinate phase that the current potential that makes the connected node between described data writing module and described the first light emitting control submodule is dragged down;
Described data writing module responds the second control signal, enters the phase III that sends described the second frame data signals to described drive control module; And described the first light emitting control submodule responds described the second control submodule, enter the described phase III, make between the grid of described driving transistors and the drain electrode and disconnect, and described first regulates submodule responds described the second control signal, and the source electrode of described driving transistors and grid are disconnected with the voltage signal that can drive described driving transistors respectively.
According to more than, particularly, the first light emitting control submodule, first input end is connected with the output terminal of described data writing module, two output terminals are connected with drain electrode with the grid of described driving transistors respectively; Described the first light emitting control submodule is used for responding described the second control signal, and the grid of described driving transistors and drain electrode are disconnected or conducting; In addition, a described wherein output terminal of described regulon is connected with link B between described data writing module and described the first light emitting control submodule;
The second light emitting control submodule is arranged between described luminescent device and the described driving transistors, is used for responding described the first control signal, makes between described driving transistors and the described luminescent device to disconnect or conducting;
First regulates submodule, described first two input ends regulating submodule are connected with described tertiary voltage signal end with the second voltage signal end respectively, described first regulates submodule is used for responding described the first control signal and/or described the second control signal, make disconnection or conducting between described first the first output terminal of regulating submodule and the described second voltage signal end, and respond described the first control signal and/or described the second control signal, make described first regulate between the second output terminal of submodule and the described second voltage signal end conducting or and described tertiary voltage signal end between conducting; The source electrode of wherein said driving transistors is connected with described first the second output terminal of regulating submodule, and described luminescent device is connected with the first voltage signal end;
Second regulates submodule, the wherein said second input end of regulating submodule is connected with described tertiary voltage signal end, output terminal is connected with described link B, described second regulates submodule is used for responding described the 3rd control signal, makes between described link B and the described tertiary voltage signal end to disconnect or conducting.
In the present embodiment; drive control module is divided into the first and second light emitting control submodules; first and second regulate submodule; it only is preferred embodiment; present embodiment is not limited to this; those skilled in the art also can make to described drive control module the modification of other modes; for example; do not comprise that two are regulated submodule; but the function that will regulate submodule is included in the data writing module and is realized; perhaps; in drive control module, introduce the transistor device with other additional functions, to play stable control; the effect of noise decrease electric current, perhaps order of connection of conversion components and parts etc. in the reasonable scope; all be encompassed within the claimed scope of the utility model; in like manner, the specific implementation of described data writing module also only is preferred embodiment, and its circuit connection structure of containing is not limited to this.
Above-mentioned frame scan pixel display driver unit, in the described phase one, described first regulates submodule responds described the first control signal, conducting between the source electrode of described driving transistors and the second voltage signal end, and conducting between the link B between data writing module and the first light emitting control submodule and the described second voltage signal end; In the described phase III, described first regulates submodule responds described the second control signal, conducting between the source electrode of described driving transistors and the tertiary voltage signal, and disconnect between described link B and the described second voltage signal end.
One end of wherein said luminescent device is connected with the first voltage signal end, in the described phase one, driving transistors and luminescent device are arranged between described second voltage signal end and described the first voltage signal end, driving transistors conducting, luminescent device are in the luminance according to the first frame data signals.
Adopt above-mentioned frame scan pixel display driver unit, realize the hardwood scan mode, when the data writing module responds the 4th control signal, the current potential of the second frame data signals that the data-signal end is exported loads and when being latched in an inner node, first regulates submodule responds the first control signal, makes first to regulate conducting between the first output terminal of submodule and the second voltage signal end; Described the first light emitting control submodule responds the second control signal, makes between the grid of driving transistors and the drain electrode to disconnect; Described the second light emitting control submodule responds described the first control signal, makes conducting between described driving transistors and the described luminescent device, and described luminescent device is luminous.Therefore, in the data load phase, it is luminous that luminescent device keeps, and fluorescent lifetime promotes, and the display effect of display device is greatly improved, and can also reduce on the other hand display device in the power consumption of signal write phase, thereby effectively reduces the power consumption of Display panel.
Preferably, described frame scan pixel display driver unit comprises following three working stages, wherein:
In the phase one, described data writing module responds described the 4th control signal, and the current potential of described data-signal end institute outputting data signals is loaded and be latched in an inner node; Simultaneously described first regulate submodule and responds described the first control signal and/or described the second control signal, make described first to regulate conducting between the first output terminal of submodule and the described second voltage signal end; Described the first light emitting control submodule responds described the second control signal, makes between the grid of described driving transistors and the drain electrode to disconnect; Described the second light emitting control submodule responds described the first control signal, makes conducting between described driving transistors and the described luminescent device, and described luminescent device is luminous;
In subordinate phase, described second regulates submodule responds described the 3rd control signal, described second regulates conducting between the output terminal of submodule and the described tertiary voltage signal end, makes voltage between the public connecting end of described data writing module and described the first light emitting control submodule equal the voltage of described tertiary voltage signal end;
In the phase III, described data writing module responds described the second control signal, being connected between conducting and described the first light emitting control submodule, the current potential of the data-signal of inner lock storage is transferred to described the first light emitting control submodule; Described the first light emitting control submodule responds described the second control signal, makes the grid and drain electrode conducting of described driving transistors; Simultaneously described first regulate submodule and responds described the second control signal, make described first to regulate conducting between the second output terminal of submodule and the described second voltage signal end, described luminescent device is not luminous.
Wherein, in the described phase one, described the first control signal and described the 4th control signal are opened, and described the second control signal and described the 3rd control signal are closed; In described subordinate phase, described the 3rd control signal is opened, and described the first control signal, described the second control signal and described the 4th control signal are closed; In the described phase III, described the first control signal, described the 3rd control signal and described the 4th control signal are closed, and described the second control signal is opened.
In addition, described the 4th control signal is scanning gate signal, and described frame scan display circuit comprises the described pixel cell of multirow, after the described phase one of the described pixel cell of every delegation is all complete, enters described subordinate phase.In addition, described frame scan display circuit comprises the described pixel cell of multiple row, and each described regulon is corresponding to be connected with the described pixel cell of row, thereby can reach the technique effect that the data line number of reduction image element circuit is simplified dot structure more.
Preferably, described tertiary voltage signal end grounding connection also is that tertiary voltage signal end output voltage values is zero.Below in conjunction with Fig. 2 the particular circuit configurations of the described frame scan pixel of the utility model specific embodiment display driver unit is described in detail.
Consult shown in Figure 2, the image element circuit structure of the present embodiment contains 9 TFT(Thin Film Transistor, Thin Film Transistor (TFT)) and 2 capacitor C, driving transistors M1 wherein, second switch transistor M2, the 3rd switching transistor M3, the 4th switching transistor M4, the 5th switching transistor M5, the 6th switching transistor M6, minion are closed transistor M7, the 8th switch transistor M8, the 9th switching transistor M9 are respectively P type field effect transistor.Below in the explanation, for driving transistors M1, with flow direction definition source, the drain electrode of reference current, the inflow utmost point of electric current flows out the utmost point as drain electrode as source electrode.For switching transistor M2 to M9, when wherein an electrode was as source electrode, then another electrode was as drain electrode.
In addition, in the present embodiment, with V
DataExpression data-signal end, V
SSRepresent the first voltage signal end, V
DDExpression second voltage signal end, V
GNDExpression tertiary voltage signal end, wherein this V
GNDGrounding connection also is that output voltage is zero.On the other hand, respectively with S
Emission, S
Reset, S
InitialAnd S
GateRepresent the first control signal, the second control signal, the 3rd control signal and the 4th control signal.
As shown in Figure 2, in the described frame scan display circuit of the present embodiment, described the first light emitting control submodule specifically comprises:
The first capacitor C 1 is arranged between the grid of data writing module and driving transistors M1; In the present embodiment, an electrode of the first capacitor C 1 is connected with the grid of described driving transistors M1, and the 5th switching transistor M5 in another electrode and the described data writing module is connected;
Second switch transistor M2, source electrode is connected grid and control signal S with the grid of driving transistors with drain electrode respectively with drain electrode
ResetConnect, be used for this control signal of response S
Reset, disconnect or the grid of conducting driving transistors M1 with drain between be connected.
Described the second light emitting control submodule specifically comprises:
The 3rd switching transistor M3, the source electrode of described the 3rd switching transistor M3 is connected with the drain electrode of described driving transistors M1, and drain electrode is connected grid and control signal S with described luminescent device D1
EmissionConnect, by responding this control signal S
Emission, disconnect or conducting driving transistors M1 and luminescent device D1 between be connected.
Described data writing module specifically comprises:
Series connection is arranged on V successively
GNDAnd the second capacitor C 2 between the first light emitting control submodule and the 5th switching transistor M5, also namely the source electrode of the 5th switching transistor M5 is connected with the second capacitor C 2, and drain electrode is connected with the first capacitor C 1, wherein the grid of the 5th switching transistor M5 and control signal S
ResetConnect;
The 4th switching transistor M4, the grid of described the 4th switching transistor M4 and control signal S
GateConnect source electrode and data-signal end V
DataConnect, drain electrode is connected with public connecting end A between the second capacitor C 2 and the 5th switching transistor M5;
Wherein the 4th switching transistor M4 is used for responsive control signal S
Gate, with described data-signal end V
DataThe current potential of institute's outputting data signals is loaded on the A point; The 5th switching transistor M5 is used for responsive control signal S
Reset, the current potential at the public connecting end A place between the second capacitor C 2 and the 5th switching transistor M5 is latched, perhaps transfer to the first light emitting control submodule, also namely transfer to the first capacitor C 1.
Described first regulates submodule specifically comprises:
The 6th switching transistor M6, source electrode and tertiary voltage signal end V
GNDConnect, drain electrode is connected grid and control signal S with the source electrode of driving transistors M1
ResetConnect;
Minion is closed transistor M7, source electrode and second voltage signal end V
DDConnect, drain electrode is connected grid and control signal S with the drain electrode of the 6th switching transistor M6
EmissionConnect;
The 8th switch transistor M8, source electrode and second voltage signal end V
DDConnect, the drain electrode with data writing module and described the first light emitting control submodule between public connecting end be connected, in the present embodiment, the drain electrode of the 8th switch transistor M8 is connected the grid of the 8th switch transistor M8 and control signal S with public connecting end B between the 5th switching transistor M5 and the first capacitor C 1
EmissionConnect.
The 8th switch transistor M8 is by responsive control signal S
Emission, can make second voltage signal end V
DDWith the conducting that is connected between the B point, magnitude of voltage and second voltage signal end V that B is ordered
DDMagnitude of voltage equate; The 6th switching transistor M6 and minion are closed transistor M7 by responsive control signal S
ResetWith control signal S
Emission, can make voltage and the second voltage signal end V at the source electrode place of driving transistors M1
DDMagnitude of voltage equate, perhaps with tertiary voltage signal end V
GNDMagnitude of voltage equate.
The described frame scan display circuit of Fig. 2 specific embodiment, the specific works sequential that shows in frame signal input can be divided into three phases, and Fig. 3 is the sequential chart of this display circuit, and Fig. 4 is for adopting the luminous sequential chart of this display circuit luminescent device.
Below in conjunction with Fig. 3 and Fig. 4 the specific works process of the described frame scan display circuit of the utility model specific embodiment is described.
In 1. stage, be the glow phase of upper frame signal, each row of data is written into public connecting end A between the second capacitor C 2 and the 5th switching transistor M5.Control signal S wherein
EmissionAnd S
GateOpen control signal S
ResetAnd S
InitialClose.
Be charged as example with the first row pixel, when the phase one C point current potential at driving transistors M1 grid place be on the data-dependent signal of a hardwood driving transistors M1, simultaneously control signal S
EmissionOpen, go up like this hardwood data-signal control driving transistors M1 and realize showing.Simultaneously because S
ResetBe in closed condition, second switch transistor M2 and the 5th switching transistor M5 are in closed condition, and the variation of signal latch point A point current potential can not have influence on B point current potential like this.This moment control signal S
GateOpen, the 4th switching transistor M4 is opened, by data-signal end V
DataNew data-signal is loaded into latchs an A point.The minion of regulon is closed transistor M7 and the 8th switch transistor M8 unlatching simultaneously, so that B point current potential equals second voltage signal end V
DDVoltage, the source electrode place of driving transistors M1 equals second voltage signal end V like this
DDVoltage, thereby realize that luminescent device OLED's is luminous.
Utilize aforesaid way that the first row of pixel cell is finished the charging action, when carrying out afterwards the charging of the second row, the control signal S of the second row
GateOpen, all the 4th switching transistor M4 on the second row are opened, the data-signal of every row is loaded into respectively latchs accordingly an A, make the second row finish the charging action, by that analogy, n to the last is capable to finish above-mentioned action, and full frame is finished charging like this.Carry out afterwards S
ResetUnblanking, all pixels of this signal controlling make the counter-rotating of full frame achieve frame.
2. the stage is the reseting stage of Node B.When this stage, control signal S
Emission, S
GateAnd S
ResetAll be in closed condition, only have control signal S
InitialBe in opening, the 9th switching transistor responds this control signal S
InitialConducting makes public connecting end B point (this B point also is a plate potential of the first capacitor C 1) and tertiary voltage signal end V between the first capacitor C 1 and the 5th switching transistor M5
GNDBe communicated with, because V
GNDGrounding connection, so B point current potential is pulled down to zero.So among this embodiment, control signal S
InitialBe the hardwood signal, make after this control signal is opened that the B point all drags down in all pixels of panel.
In 3. stage, these frame data enter to the grid at driving transistors M1 place, and luminescent device OLED is in closed condition.In this stage, control signal S wherein
ResetOpen control signal S
Emission, S
GateAnd S
InitialClose.So in the present embodiment, this control signal S
ResetBe the frame reverse control signal, so that new data-signal is when being written to the grid of driving transistors M1, luminescent device OLED can be not influenced.
As control signal S
ResetDuring unlatching, the 6th switching transistor M6 conducting of second switch transistor M2 and regulon, after the 6th switching transistor M6 opens with tertiary voltage signal end V
GNDVoltage signal be transferred to the source electrode of driving transistors M1, simultaneously second switch transistor M2 conducting so that driving transistors M1 forms the diode connected mode, the relative source electrode that drains has V
THPressure drop reduce, the driving transistors C point current potential of giving birth to becomes V like this
GND+ V
TH(V
THRelatively P type thin film transistor (TFT) is negative value), the 5th switching transistor M5 opens simultaneously, is transferred to the B point with being latched in the data-signal that A orders.So that B point current potential becomes V
Data, and the voltage difference at the first capacitor C 1 two ends is V
Data+ V
TH
Through above-mentioned process, as control signal S
ResetAfter closing, enter into writing of next frame signal, repeat the phase one process.And as control signal S
EmissionAfter the unlatching, the first capacitor C 1 B of place point current potential becomes V
DD, according to the electric capacity conservation principle, the driving transistors M1 grid C of place point current potential then forms V
DD+ V
Date+ V
Th, this moment is because minion is closed transistor and the 8th switch transistor turns, so driving transistors M1 source electrode place current potential is V
DD, because driving transistors M1 is in the saturation region, so current formula is:
K=(W/L) * C * u wherein, this numerical value is relatively stable in the same structure, is a constant therefore.
According to above-mentioned, can draw, the electric current of the luminescent device OLED that flows through this moment is just relevant with data-signal, with the bucking voltage V of driving transistors
THVoltage V with the second voltage signal end
DDIrrelevant, thus realize V
THAnd V
DDThe compensate function of the IR Drop of power voltage drop has improved display effect.
In the above-mentioned frame scan display circuit, because driving transistors M1, switching transistor M2 to M9 are respectively P type thin film field-effect pipe, so in the above description, control signal S
Emission, S
Gate,S
ResetAnd S
InitiaThe current potential that current potential when opening respectively is lower than corresponding control signal when closing.
In addition, frame scan pixel display driver unit described above, the first adjusting submodule and second is regulated submodule and can be arranged on the glass substrate of display device by the backboard process technology, also can be integrated among the data I C.Described frame scan display circuit comprises the pixel cell of multiple row, best, first regulates submodule regulates with being connected that submodule is corresponding to be connected with the described pixel cell of row, thereby reaches the data line number of reduction display circuit, the technique effect that dot structure is simplified more.
According to more than, in the described frame scan pixel of the utility model specific embodiment display driver unit, light emitting control submodule by pixel region is concocted mutually with the adjusting submodule of public area, not only can scan by achieve frame, and on luminescent device receives the hardwood data luminous in, be in the ablation process of next frame signal, as shown in Figure 4, so that the fluorescent lifetime of luminescent device promotes greatly, display effect is improved, reduce simultaneously display device in the power consumption of signal write phase, thereby effectively reduce the power consumption of Display panel; Can also realize V on the other hand
THAnd V
DDThe compensate function of the IR Drop of power voltage drop further improves display effect.
The particular circuit configurations of above-mentioned frame scan pixel display driver illustrated in fig. 2 unit, it only is the preferred embodiment of the utility model embodiment, not as the restriction to technical solutions of the utility model, except above-mentioned concrete syndeton, also contained multiple implementation, comprise some equivalents and change to said structure, as, connect one or more transistor devices that an end ground connection is arranged at described driving transistors and/or driving node location place, to discharge noise current when the output low level signal, when export, high level signal guarantees that driving voltage stablizes; Perhaps the order of connection, the connected node of components and parts are done reasonable conversion, the allomeric function of circuit is constant; Perhaps transistor is done P, N type conversion, be equal to for the purpose that realizes the utility model embodiment, can solve the problems of the technologies described above equally, reach described technique effect.
In addition, need to prove, for the transistor of field of liquid crystal display, drain electrode and source electrode do not have clear and definite difference, therefore the transistorized source electrode of mentioning among the utility model embodiment can be transistorized drain electrode, and transistorized drain electrode also can be transistorized source electrode.Simultaneously, the first end of electric capacity and the second end do not have clear and definite differentiation yet, just in order clearly to describe the annexation of electric capacity.
Comprise for the driving method that drives as mentioned above frame scan pixel display driver unit:
In the phase one, described the first frame data signals that described drive control module is sent according to described data writing module is controlled described driving transistors and is driven the pixel demonstration according to described the first frame data signals; And simultaneously described data writing module receives and latchs described the second frame data signals;
In subordinate phase, be between described phase one and described phase III, the current potential of the connected node between described data writing module and the described drive control module is dragged down, for transferring to described drive control module, described the second frame data signals prepares.
In the phase III, described data writing module sends described the second frame data signals to described drive control module.
Specifically, in the phase one, apply described the first control signal, described the second control signal, described the 3rd control signal and described the 4th control signal, make described data writing module respond described the 4th control signal, the current potential of described data-signal end institute outputting data signals is loaded and be latched in an inner node; Simultaneously described first regulate submodule and responds described the first control signal, make described first to regulate conducting between the first output terminal of submodule and the described second voltage signal end; Described the first light emitting control submodule responds described the second control signal, makes between the grid of described driving transistors and the drain electrode to disconnect; Described the second light emitting control submodule responds described the first control signal, makes conducting between described driving transistors and the described luminescent device, and described luminescent device is luminous;
In subordinate phase, apply described the first control signal, described the second control signal, described the 3rd control signal and described the 4th control signal, described second regulates submodule responds described the 3rd control signal, described second regulates conducting between the output terminal of submodule and the described tertiary voltage signal end, makes voltage between the public connecting end of described data writing module and described the first light emitting control submodule equal the voltage of described tertiary voltage signal end;
In the phase III, apply described the first control signal, described the second control signal, described the 3rd control signal and described the 4th control signal, described data writing module responds described the second control signal, being connected between conducting and described the first light emitting control submodule, the current potential of the data-signal of inner lock storage is transferred to described the first light emitting control submodule; Described the first light emitting control submodule responds described the second control signal, makes the grid and drain electrode conducting of described driving transistors; Simultaneously described first regulate submodule and responds described the second control signal, make described first to regulate conducting between the second output terminal of submodule and the described second voltage signal end, described luminescent device is not luminous.
Wherein, in the described phase one, described the first control signal and described the 4th control signal are opened, and described the second control signal and described the 3rd control signal are closed; In described subordinate phase, described the 3rd control signal is opened, and described the first control signal, described the second control signal and described the 4th control signal are closed; In the described phase III, described the first control signal, described the 3rd control signal and described the 4th control signal are closed, and described the second control signal is opened.
The three phases of in the present embodiment the drives process being divided; it only is preferred dividing mode; for the embodiment with equivalent circuit function; can be according to different conditions, angle and multiple dividing mode is arranged; be not limited only to the above mode, included multiple dividing mode is all within protection domain of the present utility model.
The utility model specific embodiment also provides a kind of display device that comprises as mentioned above frame scan pixel display driver unit on the other hand, and the detailed structure of described frame scan display circuit does not repeat them here as mentioned above.
According to more than, the described frame scan display circuit of the utility model specific embodiment and display device thereof, not only can achieve frame scanning, and can realize V
THAnd V
DDThe compensate function of the IR Drop of power voltage drop improves display effect, and reduces display device in the power consumption of signal write phase.
The above only is preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (13)
1. a frame scan pixel display driver unit comprises the driving transistors that shows for driving pixel, it is characterized in that, also comprises:
Be used for controlling described driving transistors and drive the drive control module that pixel shows according to the first frame data signals, described drive control module is connected with described data writing module, receives described the first frame data signals from described data writing module;
Be used for when described driving transistors drives the pixel demonstration according to described the first frame data signals, described data writing module receives and latchs the second frame data signals, and after the demonstration of described the first frame data signals finishes, send the data writing module of described the second frame data signals to described drive control module.
Wherein, described the second frame data signals next frame data-signal that is described the first frame data signals.
2. frame scan pixel display driver as claimed in claim 1 unit is characterized in that, described drive control module comprises:
Be used for receiving described the second frame data signals from described data writing module, and the first light emitting control submodule of conducting between the grid that makes described driving transistors after the described pixel demonstration end and drain electrode, described the first light emitting control submodule is connected with described data writing module; After the conducting, described driving transistors is in the diode connected mode between the grid of wherein said driving transistors and the drain electrode;
Be used for when described driving transistors drives the pixel demonstration, make conducting between described driving transistors and the luminescent device, after described pixel shows end, make the second light emitting control submodule that disconnects between described driving transistors and the luminescent device, described the second light emitting control submodule is arranged between described driving transistors and the described luminescent device;
Be used for when described driving transistors drives the pixel demonstration, for source electrode and the grid of described driving transistors provides the voltage signal that can make described driving transistors conducting, when described pixel shows end, make source electrode and the grid of described driving transistors regulate submodule with first of described voltage signal disconnection respectively, described first two output terminals regulating submodule are connected with grid with the source electrode of described driving transistors respectively;
Be used for working as described data writing module before described the second frame data signals is sent to described the first light emitting control submodule, what make that the current potential of the connected node between described data writing module and described the first light emitting control submodule dragged down second regulates submodule, and the described second output terminal of regulating submodule is connected with described connected node.
3. frame scan pixel display driver as claimed in claim 2 unit, it is characterized in that, described first regulates submodule responds the first control signal, and described the first light emitting control submodule enters and drives described driving transistors carries out the pixel demonstration according to described the first frame data signals phase one; Described data writing module responds the 4th control signal, enters the described phase one, receives and latch described the second frame data signals; Described the second light emitting control submodule responds described the first control signal, enters the described phase one, conducting between described driving transistors and the luminescent device;
Described second regulates submodule responds the 3rd control signal, enters the subordinate phase that the current potential that makes the connected node between described data writing module and described the first light emitting control submodule is dragged down;
Described data writing module responds the second control signal, enters the phase III that sends described the second frame data signals to described drive control module; And described the first light emitting control submodule responds described the second control submodule, enter the described phase III, disconnect between the grid of described driving transistors and the drain electrode, and described first regulates submodule responds described the second control signal, and the source electrode of described driving transistors and grid disconnect with the voltage signal that can drive described driving transistors respectively.
4. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described the first light emitting control submodule specifically comprises:
The first electric capacity, the first end of described the first electric capacity is connected with the grid of described driving transistors, and the second end of described the first electric capacity is connected with the output terminal of described data writing module;
The second switch transistor, the transistorized grid of described second switch is connected with described the second control signal, the transistorized source electrode of described second switch is connected with the grid of described driving transistors, and the transistorized drain electrode of described second switch is connected with the drain electrode of described driving transistors.
5. frame scan pixel display driver as claimed in claim 3 unit, it is characterized in that, described the second light emitting control submodule specifically comprises: the 3rd switching transistor, the grid of described the 3rd switching transistor is connected with the first control signal, the source electrode of described the 3rd switching transistor is connected with the drain electrode of described driving transistors, the drain electrode of described the 3rd switching transistor is connected with luminescent device, and an end of wherein said luminescent device is connected with one first voltage signal end.
6. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described data writing module specifically comprises:
The 5th switching transistor, the grid of described the 5th switching transistor is connected with described the second control signal, and the drain electrode of described the 5th switching transistor is connected with described the first light emitting control submodule as the output terminal of described data writing module;
The second electric capacity, the first end of described the second electric capacity is connected with the source electrode of described the 5th switching transistor, and the second end is connected with described tertiary voltage signal end;
The 4th switching transistor, the grid of described the 4th switching transistor is connected with described the 4th control signal, the source electrode of described the 4th switching transistor is connected with the data-signal end, and the drain electrode of described the 4th switching transistor is connected with public connecting end A between described the second electric capacity and described the 5th switching transistor.
7. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described first regulates submodule specifically comprises:
The 6th switching transistor, the source electrode of described the 6th switching transistor is connected with a tertiary voltage signal end, the drain electrode of described the 6th switching transistor is connected with the source electrode of described driving transistors, and the grid of described the 6th switching transistor is connected with described the second control signal;
Minion is closed transistor, described minion is closed transistorized source electrode and is connected with a second voltage signal end, described minion is closed transistorized drain electrode and is connected with the drain electrode of described the 6th switching transistor, and described minion is closed transistorized grid and is connected with described the first control signal;
The 8th switch transistor, the transistorized source electrode of described the 8th switch is connected with described second voltage signal end, the transistorized drain electrode of described the 8th switch is connected with public connecting end B between described data writing module and described the first light emitting control submodule, and the transistorized grid of described the 8th switch is connected with described the first control signal.
8. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described second regulates submodule specifically comprises:
The 9th switching transistor, the source electrode of described the 9th switching transistor is connected with described tertiary voltage signal end, the drain electrode of described the 9th switching transistor is connected with the output terminal of described data writing module, and the grid of described the 9th switching transistor is connected with described the 3rd control signal.
9. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described the 4th control signal is scanning gate signal, after the described phase one of every delegation pixel cell is all complete, enters described subordinate phase.
10. frame scan pixel display driver as claimed in claim 9 unit is characterized in that, described first regulates submodule and described the second adjusting, and submodule is corresponding is connected with a row pixel cell.
11. frame scan pixel display driver as claimed in claim 3 unit is characterized in that, described tertiary voltage signal end grounding connection.
12. frame scan pixel display driver as claimed in claim 3 unit is characterized in that:
In the described phase one, described the first control signal and described the 4th control signal are low level, and described the second control signal and described the 3rd control signal are high level; In described subordinate phase, described the 3rd control signal is low level, and described the first control signal, described the second control signal and described the 4th control signal are high level; In the described phase III, described the first control signal, described the 3rd control signal and described the 4th control signal are high level, and described the second control signal is low level.
13. a display device is characterized in that, comprises such as each described frame scan pixel display driver unit of claim 1 to 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229382 CN203204996U (en) | 2013-04-28 | 2013-04-28 | Frame scanning pixel display driving unit and display device thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320229382 CN203204996U (en) | 2013-04-28 | 2013-04-28 | Frame scanning pixel display driving unit and display device thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247278A (en) * | 2013-04-28 | 2013-08-14 | 京东方科技集团股份有限公司 | Frame scanning pixel display drive unit as well as drive method and display method thereof |
| CN104700776A (en) * | 2015-03-25 | 2015-06-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof, display device |
| US9275577B2 (en) | 2013-04-28 | 2016-03-01 | Boe Technology Group Co., Ltd. | Frame scanning pixel display driving unit and driving method thereof, display apparatus |
| CN115206231A (en) * | 2022-09-06 | 2022-10-18 | 禹创半导体(深圳)有限公司 | Micro LED scanning drive circuit suitable for simulating PWM drive |
-
2013
- 2013-04-28 CN CN 201320229382 patent/CN203204996U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103247278A (en) * | 2013-04-28 | 2013-08-14 | 京东方科技集团股份有限公司 | Frame scanning pixel display drive unit as well as drive method and display method thereof |
| CN103247278B (en) * | 2013-04-28 | 2015-08-19 | 京东方科技集团股份有限公司 | Frame scan pixel display driver unit and driving method, display device |
| US9275577B2 (en) | 2013-04-28 | 2016-03-01 | Boe Technology Group Co., Ltd. | Frame scanning pixel display driving unit and driving method thereof, display apparatus |
| CN104700776A (en) * | 2015-03-25 | 2015-06-10 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof, display device |
| CN115206231A (en) * | 2022-09-06 | 2022-10-18 | 禹创半导体(深圳)有限公司 | Micro LED scanning drive circuit suitable for simulating PWM drive |
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