CN105047153A - Driving circuit and display device - Google Patents
Driving circuit and display device Download PDFInfo
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- CN105047153A CN105047153A CN201510485869.4A CN201510485869A CN105047153A CN 105047153 A CN105047153 A CN 105047153A CN 201510485869 A CN201510485869 A CN 201510485869A CN 105047153 A CN105047153 A CN 105047153A
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Abstract
The invention provides a driving circuit which is used for performing signal driving on a liquid crystal display panel. The driving circuit comprises a signal generation module, a signal conversion module and a signal output module. The signal generation module is used for generating data signals and scanning signals; the signal conversion module comprises a plurality of transmultiplexers and is used for converting a data signal to a plurality of data signals; and the signal output module is used for transmitting the converted data signal to a corresponding data line. The driving circuit structure reduces the power consumption of the circuit. The invention also provides a display device, comprising the said driving circuit and having an advantage of low power consumption.
Description
[technical field]
The present invention relates to LCD Technology field, particularly a kind of driving circuit and display device thereof.
[background technology]
Along with the raising of display panel resolution, the power consumption of mobile display product is also more and more higher, and the bottleneck of power consumption is more and more outstanding.Particularly when environment temperature raises time, the power consumption of display panel can increase sharp, and at this moment display panel usually can occur to drive not enough situation, causes very large inconvenience.Transmultiplexer TMUX, in the transmission of data, multiplex stream can be packaged into a transmission class and transmit, but general Transmultiplexer TMUX power consumption is too high, also needs the signal input unit of equal number to carry out control signal output channel.
[summary of the invention]
The object of the present invention is to provide a kind of driving circuit, this driving circuit decreases IC lead-out terminal, also reduces the power consumption of circuit.Present invention also offers a kind of display device, this device comprises above-mentioned driving circuit, has the advantage of low-power consumption.
Technical scheme of the present invention is as follows:
A kind of driving circuit, for carrying out signal driving to display panels, is characterized in that, comprising:
Signal generator module, for generation of data-signal and sweep signal;
Signal conversion module, comprises multiple Transmultiplexer TMUX, for a data-signal is converted to multiple data-signal; And
Signal output module, for being sent to corresponding data line by the data-signal after conversion;
Wherein each described Transmultiplexer TMUX comprises:
One signal input unit, for input data signal;
First converting unit, for carrying out the first multipath conversion to described data-signal;
Second converting unit, for carrying out the second multipath conversion to the data-signal after carrying out described first multipath conversion; And
One signal output unit, for exporting the data-signal after described second multipath conversion.
Preferably, described Transmultiplexer TMUX also comprises the first driving wire for exporting the first drive singal, and the second driving wire for exporting the second drive singal.
Preferably, described first converting unit comprises at least two the first film transistors, the source electrode of described the first film transistor is connected with described signal input unit, the drain electrode of described the first film transistor is connected with the output terminal of described first converting unit, described first drives wire to comprise at least two wires, described first drives the grid of wire and described the first film transistor to connect one to one, and the grid of described the first film transistor inputs the first drive singal.
Preferably, described second converting unit comprises at least two thin film transistor (TFT) groups, each described thin film transistor (TFT) group comprises at least two the second thin film transistor (TFT)s, wherein said thin film transistor (TFT) group and described the first film transistor one_to_one corresponding, wherein the source electrode of the second thin film transistor (TFT) connects with the drain electrode of corresponding described the first film transistor, the drain electrode of described second thin film transistor (TFT) connects with corresponding described signal output unit, described second drives wire to comprise at least two wires, described second drives the grid of the second thin film transistor (TFT) of wire and each described thin film transistor (TFT) group to connect one to one, the grid of described second thin film transistor (TFT) inputs the second drive singal.
Preferably, described first drives the number of wire identical with the number of described the first film transistor, and described second drives the number of wire identical with the number of the second thin film transistor (TFT) of described each thin film transistor (TFT) group.
Preferably, described first the first drive singal of wire and second is driven to drive the second drive singal of wire to be provided by the plug-in power supply on flexible PCB.
Preferably, when a described first driving wire input high level signal, the equal input low level signal of all the other the first driving wires, when a described second driving wire input high level signal, the equal input low level signal of remaining the second driving wire.
A kind of display device, comprises one drive circuit, and described driving circuit is used for carrying out signal driving to display panels, comprising:
Signal generator module, for generation of data-signal and sweep signal;
Signal conversion module, comprises multiple Transmultiplexer TMUX, for a data-signal is converted to multiple data-signal; And
Signal output module, for being sent to corresponding data line by the data-signal after conversion;
Wherein each described Transmultiplexer TMUX comprises:
One signal input unit, for input data signal;
First converting unit, for carrying out the first multipath conversion to described data-signal;
Second converting unit, for carrying out the second multipath conversion to the data-signal after carrying out described first multipath conversion;
First drives wire, for exporting the first drive singal;
Second drives wire, for exporting the second drive singal; And
One signal output unit, for exporting the data-signal after described second multipath conversion.
Preferably, described first converting unit comprises at least two the first film transistors, the source electrode of described the first film transistor is connected with described signal input unit, the drain electrode of described the first film transistor is connected with the output terminal of described first converting unit, described first drives wire to comprise at least two wires, described first drives the grid of wire and described the first film transistor to connect one to one, and the grid of described the first film transistor inputs the first drive singal.
Preferably, described second converting unit comprises at least two thin film transistor (TFT) groups, each described thin film transistor (TFT) group comprises at least two the second thin film transistor (TFT)s, wherein said thin film transistor (TFT) group and described the first film transistor one_to_one corresponding, wherein the source electrode of the second thin film transistor (TFT) connects with the drain electrode of corresponding described the first film transistor, the drain electrode of described second thin film transistor (TFT) connects with corresponding described signal output unit, described second drives wire to comprise at least two wires, described second drives the grid of the second thin film transistor (TFT) of wire and each described thin film transistor (TFT) group to connect one to one, the grid of described second thin film transistor (TFT) inputs the second drive singal.
Beneficial effect of the present invention:
Driving circuit of the present invention decreases IC lead-out terminal, and the driving of wire uses the plug-in power supply of flexible PCB, solves the problem that driving is not enough and display is abnormal because Transmultiplexer TMUX causes, also reduces the power consumption of circuit.Display device of the present invention, this device, owing to comprising above-mentioned driving circuit, has the advantage of low-power consumption.
[accompanying drawing explanation]
Fig. 1 is the structural framing schematic diagram of driving circuit of the present invention;
Fig. 2 is the structural framing schematic diagram of Transmultiplexer TMUX of the present invention.
Fig. 3 is the electrical block diagram of Transmultiplexer TMUX of the present invention;
Fig. 4 is the driver' s timing schematic diagram of Transmultiplexer TMUX circuit control signal of the present invention.
[embodiment]
The explanation of following embodiment is graphic with reference to what add, can in order to the specific embodiment implemented in order to illustrate the present invention.The direction term that the present invention mentions, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side " etc., be only the direction with reference to annexed drawings.Therefore, the direction term of use is in order to illustrate and to understand the present invention, and is not used to limit the present invention.In the drawings, the unit that structure is similar represents with identical label.
Embodiment 1
Be illustrated in figure 1 the structural framing schematic diagram of driving circuit of the present invention, a kind of driving circuit 10 of the present invention as shown in Figure 1, for carrying out signal driving to display panels, comprise the signal generator module 101 for generation of data-signal and sweep signal, for a data-signal being converted to the signal conversion module 102 of multiple data-signal, and for the data-signal after conversion is sent to corresponding data line signal output module 103, wherein signal conversion module 102 comprises multiple Transmultiplexer TMUX 20.
Be illustrated in figure 2 the structural framing schematic diagram of Transmultiplexer TMUX 20 of the present invention, the Transmultiplexer TMUX 20 of the present embodiment comprises a signal input unit 201, it is a signal input terminal data, first converting unit 30 and the second converting unit 30, first drives wire S4 and S5 and second to drive wire S1, S2 and S3, and signal output terminal d1, d2, d3, d4 and d5 of a signal output unit 204.The signal input terminal data of wherein said signal input unit 201 is used for input data signal, described first converting unit 30, for carrying out the first multipath conversion to described data-signal, described second converting unit 40, for carrying out the second multipath conversion to the data-signal after carrying out described first multipath conversion, described first drives wire S4 and S5, for exporting the first drive singal, described second drives wire S1, S2 and S3, for exporting the second drive singal, the signal output terminal d1 of described signal output unit 204, d2, d3, d4 and d5, for the data-signal after described second multipath conversion being outputted to the array base palte of liquid crystal panel.
Fig. 3 is the electrical block diagram of Transmultiplexer TMUX of the present invention, described first converting unit 30 of the present embodiment comprises two the first film transistors 301, this is a kind of situation of the present embodiment, but the number of described the first film transistor 301 is not limited to two, can be two or more.The source electrode of described the first film transistor 301 is connected with described signal input unit 201, the drain electrode of described the first film transistor 301 is connected with the output terminal of described first converting unit 30, described first of the present embodiment drives wire S4 and S5 to comprise two wires, but be not limited to two, can be more than two.Described first of the present embodiment drives the grid of wire S4 and S5 and described the first film transistor 301 to connect one to one, and the grid of described the first film transistor 301 inputs the first drive singal, i.e. input high level or low level signal.
Described second converting unit 40 of the present embodiment comprises two thin film transistor (TFT) groups 402, but be not limited to two thin film transistor (TFT) groups 402, it can be two or more, each described thin film transistor (TFT) group 402 comprises at least two the second thin film transistor (TFT)s 401, wherein said thin film transistor (TFT) group 402 and described the first film transistor 301 one_to_one corresponding, and the source electrode of the second thin film transistor (TFT) 401 connects with the drain electrode of corresponding described the first film transistor 301, the drain electrode of described second thin film transistor (TFT) 401 connects with corresponding described signal output unit 204.Described second of the present embodiment drives wire S1, S2 and S3 to comprise three wires, but is not limited to three, can be more than three.Described second of the present embodiment drives the grid of the second thin film transistor (TFT) 401 of wire S1, S2 and S3 and each described thin film transistor (TFT) group 402 to connect one to one, the grid of described second thin film transistor (TFT) 401 inputs the second drive singal, i.e. input high level or low level signal.
Described first of the present embodiment drives the number of wire S4 with S5 identical with the number of described the first film transistor 301, and described second drives wire S1, S2 identical with the number of the second thin film transistor (TFT) 401 of described each thin film transistor (TFT) group 402 with the number of S3.Further say that the number of the first film transistor 301 described in the present embodiment is 2, but be not limited to 2, and the drain electrode of each the first film transistor 301 connects 3 described second thin film transistor (TFT)s 401, is also not limited to 3.
In the present embodiment, when a described first driving wire S4 or S5 input high level signal, the equal input low level signal of all the other the first driving wire S5 or S4, when described second driving wire S1 or S2 or S3 input high level signal, remaining second driving wire S2 and S3, or S1 and S3, or the equal input low level signal of S1 and S2.
In addition, the first and second thin film transistor (TFT)s described in the present embodiment can be P-type TFT, also can be N-type TFT.
In addition in the present embodiment, described first drives first drive singal of wire S4 and S5 and second to drive second drive singal of wire S1, S2 and S3 to be provided by the plug-in power supply on flexible PCB.This reduces the power consumption of driving circuit, avoid the not enough and abnormal show of driving that Transmultiplexer TMUX 20 causes.
Fig. 4 is the driving wire S1 of this Transmultiplexer TMUX 20, S2, S3, the driver' s timing schematic diagram of S4 and S5 input control signal, convex-concave line in figure represents low and high level signal, wherein T0 represents initial time, the time of each time period between T1 ~ T12 is equal, i.e. T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 is all equal, T1 ~ T3 time period is the second driving wire S1, the drive cycle of a drive singal of S2 and S3, T1 ~ T6 time period is the drive cycle of a drive singal of the first driving wire S4 and S5, by that analogy.The driving method of above-mentioned Transmultiplexer TMUX 20, comprises the following steps:
(1) signalization input control sequential, make when a described first driving wire S4 input high level signal, all the other first driving wire S5 input low level signals, now described second drive wire S1, S2 and S3 input high level signal successively, described every bar first drives the time cycle of wire S4 or S5 input high level signal to equal the time cycle sum of described all second driving wire S1, S2 and S3 input high level signals, and described every bar second drives wire S1, S2 identical with the time cycle of S3 input high level signal.
As shown in Figure 4, the time cycle of S4 input high level signal equals the time cycle summation of S1, S2 and S3 input high level signal, and the time cycle of S1, S2 and S3 input high level signal is separately 1/3rd of the time cycle of S4 input high level signal.
(2) to wherein one described first drive wire S4 or S5 input high level signal, described the first film transistor 301 conducting be now attached thereto, described second thin film transistor (TFT) 401 be connected with the first film transistor 301 of described conducting drives the situation conducting successively of the input high level signal of wire S1, S2 and S3 according to be connected with its grid described second.When S4 input high level signal, the signal that S1, S2 and S3 control signal output terminal d1, d2 and d3 of described signal output unit 204 successively exports, when S5 input high level signal, the signal that S1, S2 and S3 control signal output terminal d4, d5 and d3 of described signal output unit 204 successively exports.Like this, the signal input terminal data of signal input unit 201 just controls this 6 bars lead-out terminal of d1 ~ d6 by these 5 wires of S1 ~ S5.
(3) first of described input high level signal drive the time cycle of wire S4 or S5 to terminate after, it starts input low level signal, and other one first drives wire S5 or S4 to start input high level signal, and circulation is carried out according to this.
Generally speaking, the driving method of the present embodiment, as shown in Figure 3 and Figure 4, when the first driving wire S4 input high level signal time, first drives wire S5 input low level signal, at this moment the first film transistor 301 conducting driving wire S4 to be connected with first, the first film transistor 301 driving wire S5 to be connected with first is closed.First drives in a period of time of first three point of wire S4 input high level signal, second drives wire S1 input high level signal, S2 and S3 input low level signal, the second thin film transistor (TFT) 401 conducting be now connected with signal output terminal d1, remaining second thin film transistor (TFT) 401 cuts out.When first drives in second three/a period of time of wire S4 input high level signal, second drives wire S2 input high level signal, remaining second driving wire S1 and S3 input low level signal, the second thin film transistor (TFT) 401 conducting be now connected with signal output terminal d2, remaining second thin film transistor (TFT) 401 cuts out.When first drives in the 3rd three/a period of time of wire S4 input high level signal, second drives wire S3 input high level signal, remaining second driving wire S1 and S2 input low level signal, the second thin film transistor (TFT) 401 conducting be now connected with d3, remaining second thin film transistor (TFT) 401 cuts out.When the first driving wire S5 input high level signal time, first drives wire S4 input low level signal, at this moment the first film transistor 301 conducting driving wire S5 to be connected with first, the first film transistor 301 driving wire S4 to be connected with first is closed, and all the other situations can be analogized according to afore mentioned rules.
Embodiment 2
A kind of display device, comprise one drive circuit 10, described driving circuit 10 is for carrying out signal driving to display panels, and described driving circuit 10 comprises a Transmultiplexer TMUX 20, and the structure of described Transmultiplexer TMUX 20 is identical as described in Example 1.
In sum; although the present invention discloses as above with preferred embodiment; but above preferred embodiment is also not used to limit the present invention; those of ordinary skill in the art; without departing from the spirit and scope of the present invention; all can do various change and retouching, the scope that therefore protection scope of the present invention defines with claim is as the criterion.
Claims (10)
1. a driving circuit, for carrying out signal driving to display panels, is characterized in that, comprising:
Signal generator module, for generation of data-signal and sweep signal;
Signal conversion module, comprises multiple Transmultiplexer TMUX, for a data-signal is converted to multiple data-signal; And
Signal output module, for being sent to corresponding data line by the data-signal after conversion;
Wherein each described Transmultiplexer TMUX comprises:
One signal input unit, for input data signal;
First converting unit, for carrying out the first multipath conversion to described data-signal;
Second converting unit, for carrying out the second multipath conversion to the data-signal after carrying out described first multipath conversion; And
One signal output unit, for exporting the data-signal after described second multipath conversion.
2. driving circuit according to claim 1, is characterized in that, described Transmultiplexer TMUX also comprises the first driving wire for exporting the first drive singal, and the second driving wire for exporting the second drive singal.
3. driving circuit according to claim 2, it is characterized in that, described first converting unit comprises at least two the first film transistors, the source electrode of described the first film transistor is connected with described signal input unit, the drain electrode of described the first film transistor is connected with the output terminal of described first converting unit, described first drives wire to comprise at least two wires, described first drives the grid of wire and described the first film transistor to connect one to one, and the grid of described the first film transistor inputs the first drive singal.
4. driving circuit according to claim 2, it is characterized in that, described second converting unit comprises at least two thin film transistor (TFT) groups, each described thin film transistor (TFT) group comprises at least two the second thin film transistor (TFT)s, wherein said thin film transistor (TFT) group and described the first film transistor one_to_one corresponding, wherein the source electrode of the second thin film transistor (TFT) connects with the drain electrode of corresponding described the first film transistor, the drain electrode of described second thin film transistor (TFT) connects with corresponding described signal output unit, described second drives wire to comprise at least two wires, described second drives the grid of the second thin film transistor (TFT) of wire and each described thin film transistor (TFT) group to connect one to one, the grid of described second thin film transistor (TFT) inputs the second drive singal.
5. driving circuit according to claim 2, it is characterized in that, described first drives the number of wire identical with the number of described the first film transistor, and described second drives the number of wire identical with the number of the second thin film transistor (TFT) of described each thin film transistor (TFT) group.
6. driving circuit according to claim 2, is characterized in that, described first drives the first drive singal of wire and second to drive the second drive singal of wire to be provided by the plug-in power supply on flexible PCB.
7. driving circuit according to claim 2, it is characterized in that, when a described first driving wire input high level signal, the equal input low level signal of all the other the first driving wires, when a described second driving wire input high level signal, the equal input low level signal of remaining the second driving wire.
8. a display device, is characterized in that, comprises one drive circuit, and described driving circuit is used for carrying out signal driving to display panels, it is characterized in that, comprising:
Signal generator module, for generation of data-signal and sweep signal;
Signal conversion module, comprises multiple Transmultiplexer TMUX, for a data-signal is converted to multiple data-signal; And
Signal output module, for being sent to corresponding data line by the data-signal after conversion;
Wherein each described Transmultiplexer TMUX comprises:
One signal input unit, for input data signal;
First converting unit, for carrying out the first multipath conversion to described data-signal;
Second converting unit, for carrying out the second multipath conversion to the data-signal after carrying out described first multipath conversion;
First drives wire, for exporting the first drive singal;
Second drives wire, for exporting the second drive singal; And
One signal output unit, for exporting the data-signal after described second multipath conversion.
9. display device according to claim 8, it is characterized in that, described first converting unit comprises at least two the first film transistors, the source electrode of described the first film transistor is connected with described signal input unit, the drain electrode of described the first film transistor is connected with the output terminal of described first converting unit, described first drives wire to comprise at least two wires, described first drives the grid of wire and described the first film transistor to connect one to one, and the grid of described the first film transistor inputs the first drive singal.
10. display device according to claim 8, it is characterized in that, described second converting unit comprises at least two thin film transistor (TFT) groups, each described thin film transistor (TFT) group comprises at least two the second thin film transistor (TFT)s, wherein said thin film transistor (TFT) group and described the first film transistor one_to_one corresponding, wherein the source electrode of the second thin film transistor (TFT) connects with the drain electrode of corresponding described the first film transistor, the drain electrode of described second thin film transistor (TFT) connects with corresponding described signal output unit, described second drives wire to comprise at least two wires, described second drives the grid of the second thin film transistor (TFT) of wire and each described thin film transistor (TFT) group to connect one to one, the grid of described second thin film transistor (TFT) inputs the second drive singal.
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| CN201510485869.4A CN105047153A (en) | 2015-08-10 | 2015-08-10 | Driving circuit and display device |
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Application publication date: 20151111 |