CN100437700C - Unit of transmission circuit for data wire of light display excited by electricity driven through electrical current - Google Patents
Unit of transmission circuit for data wire of light display excited by electricity driven through electrical current Download PDFInfo
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- CN100437700C CN100437700C CNB031221181A CN03122118A CN100437700C CN 100437700 C CN100437700 C CN 100437700C CN B031221181 A CNB031221181 A CN B031221181A CN 03122118 A CN03122118 A CN 03122118A CN 100437700 C CN100437700 C CN 100437700C
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Abstract
The present invention relates to a device of a transmission circuit for data wires of an electroluminescent display driven by current, which is used for receiving data current by an external signal source and driving a picture element end group of an electroluminescent display. The device at least comprises a first circuit group, a second circuit group and a shift temporary storage, wherein the shift temporary storage controls the first circuit group to receive data current and controls the second circuit group to copy and send data current from the first circuit group to the picture element end group.
Description
Technical field
The present invention relates to a kind of data line driving circuit, particularly a kind of device of data line transmission circuit of current drives electro-exciting light-emitting display.
Background technology
(electro luminescence EL) is the display technique of autoluminescence character to electroluminescence, and operation principles is by electrical means, and carrier is injected the semiconductor element of the tool characteristics of luminescence, it is excited and produces light.And electroluminescence can according to the semiconductor element character simple zones that adopts be divided into inorganic electroluminescence (inorganic electro luminescence) and organic electric-excitation luminescent (organic electroluminescence, OEL).One of drive circuit structure of electro-exciting light-emitting display is the circuit framework of active-matrix.
The simplest and the most basic electric wiring plan of active-matrix as shown in Figure 1.In Fig. 1, the function of transistor 102 is the usefulness of switch and addressing, can be described as a thin film switch transistor (Switching thin filmtransistor, switching TFT).104 signal voltage values according to storage capacitors 106 of transistor, the continuous current of modulation driven light-emitting element 108 is so 104 in transistor is called as a thin film drive transistor (driving TFT).But each picture frame time of the signal voltage value of this storage (frame time) upgrades once.
But, utilize the method for the direct driving transistors 104 of voltage, can because the characteristic difference of each driving transistors make but can produce different luminous intensities by identical driving voltage.Therefore, generally use the method for current drives at present, come the critical voltage and the mobility (mobility) of compensation for drive transistor.
At present, utilize the electro photo-luminescent apparatus of current drives that a main shortcoming is arranged,, this means that the number of current source must be identical with the number of data line because the data electric current must be provided by data line.That is to say, in present electro-exciting light-emitting display, because large scale and high-resolution requirement, so need very a large amount of data lines and the current source that is mated.Therefore, Sony company has proposed the framework of electric current door bolt (current latch), can significantly reduce the number of current source, as shown in Figure 2.
In Fig. 2, have circuit bank 202, circuit bank 204, circuit bank 206, circuit bank 212, circuit bank 214, circuit bank 215, displacement working storage (shift register, SR) 208, displacement working storage 218, activation device (enable) 209, activation device 219 and picture element end cohort 220.The blue picture element that the green picture element that the red picture element be responsible in the picture element end cohorts 220 of circuit bank 202 and circuit bank 212 wherein, circuit bank 204 and circuit bank 214 are responsible in the picture element end cohorts 220, circuit bank 206 and circuit bank 216 are responsible in the picture element end cohorts 220.Comprise a plurality of picture element ends in the picture element end cohort, utilize the switch of sweep trace (not expressing among the figure) to control these picture element end funding material electric currents and write.Displacement working storage 208 is controlled the first circuit cohort 201 that comprises circuit bank 202, circuit bank 204 and circuit bank 206 with activation device 209. Displacement working storage 218 and 219 controls of activation device comprise the second circuit cohort 211 of circuit bank 212, circuit bank 214 and circuit bank 216.
The framework of the electric current door bolt that Sony company proposes among Fig. 2, the flow process of its input data is described below.When the data electric current I
DataWhen sending over, write in regular turn in the first circuit cohort 201 by 208 controls of displacement working storage.After the process that writes was finished, ensuing next group data electric current will be switched, and is write in regular turn in the second circuit cohort 211 by 218 controls of displacement working storage.And when writing second circuit cohort 211, activation device 209 can be ordered the data electric current I of the first circuit cohort 201 with storage
DataBe sent to the picture element end that is corresponded in the picture element end cohort 220: when second circuit cohort 211 write finish after, then switch to the first circuit cohort 201 and write data by 208 controls of displacement working storage, activation device 219 then orders second circuit cohort 211 to send the data electric current I of being stored at this moment
DataThe plain end of pairing next a series of paintings to the picture element end cohort 220.
That is to say, write and the transmission data to first and second both one after the others of circuit cohort, when one of them is written into data, another then is responsible for the transmission data to picture element end cohort, then after this process is finished, both switch steps, so repetitiousness ground carries out writing and transmitting of data.The framework of this electric current door bolt can significantly reduce the number of current source, but because this framework is based on the one after the other of two circuit cohorts, each circuit cohort and its displacement working storage must use external control signal line (signal line) control, therefore the external control signal line number that uses is too much, and handled data electric current is not avoided two different circuit cohort influences, takes place and have the not good situation of image quality.
Summary of the invention
Therefore technical matters to be solved by this invention is, above-mentioned deficiency at prior art, and number that a kind of device of data line transmission circuit of current drives electro-exciting light-emitting display, this circuit can reduce the external control signal line is provided, reduces the number of electronic component in the electric current door bolt and make the circuit bank of being responsible for the picture element end cohort of transmission data electric current to the display pannel is same group.
Above-mentioned technical matters of the present invention is realized by following a plurality of technical schemes.
Scheme one
A kind of device of data line transmission circuit of current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current source, and this device comprises at least:
One displacement working storage (622) has an at least one period signal end (626) and an activation end (624);
One first circuit cohort is made up of at least one first circuit bank (612) with storaging current function, and this first circuit bank (612) is by this period signal end (626) control, to receive this data electric current that this signal source, outside is produced; And
One second circuit cohort, form by at least one second circuit group (602) with storaging current function, the current input terminal of this second circuit group (602) is electrically connected at the current output terminal of this first circuit bank (612), and this second circuit group (602) is duplicated from this first circuit bank (612) by this activation end (624) control and sent this data electric current again to this picture element end cohort (630);
Wherein, described first circuit bank (612) and second circuit group (602) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (622) is formed the types of current sources of a unit,
Described first circuit bank (612) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (626) of described displacement working storage (622) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
Ss,
Described second circuit group (602) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), and is connected to the activation end (624) of displacement working storage (622) jointly; Second pin of the 4th thin film transistor (TFT) (M4) is connected with first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), and is connected to picture element end cohort (630) jointly; Second pin of the 5th thin film transistor (TFT) (M5) connects first end of second electric capacity (Cs2) and the grid of the 6th thin film transistor (TFT) (M6); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2), and is connected to power end V jointly
DD
When this first circuit cohort is made up of a plurality of these first circuit bank (612), and this second circuit cohort is by a plurality of these second circuit groups (602) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (612) are in regular turn respectively by a plurality of these period signal end (626) controls, to receive a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (602) by this activation end (624) control, after those first circuit bank (612) are duplicated those data electric currents respectively in regular turn, send those data electric currents respectively to this picture element end cohort (630) in regular turn more in regular turn.
Scheme two
A kind of device of data line transmission circuit of current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current sink, and this device comprises at least:
One displacement working storage (322) has an at least one period signal end (326) and an activation end (324);
One first circuit cohort (311) is made up of at least one first circuit bank (312) with storaging current function, and this first circuit bank is by this period signal end (326) control, to send this data electric current to this signal source, outside; And
One second circuit cohort (301), form by at least one second circuit group (302) with storaging current function, the current output terminal of this second circuit group (302) is electrically connected at the current input terminal of this first circuit bank (312), and this second circuit group (302) is duplicated from this first circuit bank (312) by this activation end (324) control again and received this data electric current from this picture element end cohort (330);
Wherein, described first circuit bank (312) and second circuit group (302) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (322) is formed the current sink type of a unit,
Described first circuit bank (312) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (326) of described displacement working storage (322) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
DD,
Described second circuit group (302) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), and is connected to the activation end (324) of described displacement working storage (322) jointly; Second pin of the 4th thin film transistor (TFT) (M4) connects first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6); Second pin of the 5th thin film transistor (TFT) (M5) is connected with the grid of the grid of the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and first end of second electric capacity (Cs2); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2) and first pin of the 7th thin film transistor (TFT) (M7), and is connected to power end V jointly
SSSecond pin of the 7th thin film transistor (TFT) (M7) connects picture element end cohort (330).
When this first circuit cohort is made up of a plurality of these first circuit bank (312), and this second circuit cohort is by a plurality of these second circuit groups (302) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (312) are in regular turn respectively by a plurality of these period signal end (326) controls, to send a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (302) by this activation end (324) control, after those first circuit bank (312) are duplicated those data electric currents respectively in regular turn, receive those data electric currents from this picture element end cohort (330) respectively in regular turn more in regular turn.
Scheme three
A kind of device of data line transmission circuit of current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current sink, and this device comprises at least:
One displacement working storage (522) has an at least one period signal end (526) and an activation end (524);
One first circuit cohort is made up of at least one first circuit bank (512) with storaging current function, and this first circuit bank (512) is by this period signal end (526) control, to send this data electric current to this signal source, outside; And
One second circuit cohort, form by at least one second circuit group (502) with storaging current function, the current output terminal of this second circuit group (502) is electrically connected at the current input terminal of this first circuit bank (512), and this second circuit group (502) is duplicated from this first circuit bank (512) by this activation end (524) control again and received this data electric current from this picture element end cohort (530);
Wherein, described first circuit bank (512) and second circuit group (502) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (522) is formed the current sink type of a unit;
Described first circuit bank (512) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (526) of described displacement working storage (522) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
DD,
Described second circuit group (502) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), the 7th thin film transistor (TFT) (M7), and is connected to the activation end (524) of described displacement working storage (522) jointly; Second pin of the 4th thin film transistor (TFT) (M4) connects first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6) and the 7th thin film transistor (TFT) (M7); Second pin of the 5th thin film transistor (TFT) (M5) is connected with the grid of the 6th thin film transistor (TFT) (M6) and first end of second electric capacity (Cs2); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2), and is connected to power end V jointly
SSSecond pin of the 7th thin film transistor (TFT) (M7) connects picture element end cohort (530).
When this first circuit cohort is made up of a plurality of these first circuit bank (512), and this second circuit cohort is by a plurality of these second circuit groups (502) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (512) are in regular turn respectively by a plurality of these period signal end (526) controls, to send a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (502) by this activation end (524) control, after those first circuit bank (512) are duplicated those data electric currents respectively in regular turn, receive those data electric currents from this picture element end cohort (530) respectively in regular turn more in regular turn.
According to above-mentioned purpose of the present invention, a kind of device of data line transmission circuit of current drives electro-exciting light-emitting display is proposed, known two inner circuit bank parallel connections of electric current door bolt are alternately write and send the framework of data electric current, change the framework that becomes the series connection of two circuit bank, be responsible for receiving the data electric current of bringing in from input by the first circuit cohort, be responsible for sending the data electric current that will export picture element end cohort to by the second circuit cohort again, and no longer be that each circuit cohort all must be responsible for receiving the data electric current of bringing in and be sent to picture element end cohort from input voluntarily.
According to a preferred embodiment of the present invention, after the data electric current writes the first circuit cohort earlier, write in the second circuit cohort by the first circuit cohort again, be responsible for being sent to picture element end corresponding in the picture element end cohort by the second circuit cohort then, and at the same time, new data electric current is write in the first circuit cohort step that repetitiousness in regular turn like this writes and sends.Therefore, the first circuit cohort can forever be responsible for reception data electric current and also write in the second circuit cohort, and this second circuit cohort then can be responsible for the data electric current that the reception first circuit cohort sends forever and send it to picture element end cohort then.
By the invention described above preferred embodiment as can be known, use the present invention and have following advantage.
The present invention changes the electric connection and the method for operating of two circuit bank in the electric current door bolt, to reduce the number of data line and circuit component, this electric current door bolt is applied in the electro-exciting light-emitting display, and the minimizing of its data line and electronic component promptly is that reduce in the shared space of electronic component and winding displacement.Generally speaking, the winding displacement of electro-exciting light-emitting display is placed on the frame of its display screen with the operation integrated circuit more, if winding displacement is many more numerous and diverse more, then its frame then need be done to such an extent that hold a little winding displacements more greatly.This is for the display that is limited volume (for example: the apparent size size is fixed as the notebook computer of A4), if its outside frame can be done forr a short time, the effective area of screen can do more relatively.This improvement can make that electro-exciting light-emitting display is more frivolous, more is better than conventional cathode ray tube (ca thode ray tube, CRT) display.In addition, utilize fixing same circuit bank to send signal because be to picture element end cohort, the characteristic electron of this single circuit bank is fixed, can avoid because of the characteristic electron difference of different circuit bank own, make also and then difference to some extent of the current value that sends, when causing same signal to send, but may make the instability of picture element contrast by both one after the others.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Description of drawings
Fig. 1 is the simplest and electric wiring plan of the most basic embodiment of known active-matrix.
Fig. 2 is the electric wiring plan of an embodiment of known parallel-current door bolt.
Fig. 3 is the electric wiring plan that illustrates a preferred embodiment of the present invention.
Fig. 4 is the time diagram of the embodiment of Fig. 3.
Fig. 5 is the electric wiring plan that illustrates another preferred embodiment of the present invention.
Fig. 6 is the electric wiring plan that illustrates the another preferred embodiment of the present invention.
Embodiment
In order to improve the too many and instable problem of contrast of signal line of known electric current door bolt, the present invention proposes a kind of device of data line transmission circuit of current drives electro-exciting light-emitting display.
Fig. 3 is one embodiment of the invention.Circuit bank 302 and circuit bank 312 are with seven thin film transistor (TFT)s (thin film transistor among Fig. 3, TFT) M1-M7, the electric current door bolt circuit framework of current sink (current sink) type of two capacitor C s1, Cs2 and a unit of displacement working storage 322 compositions.Capacitor C s1 and the capacitor C s2 electric current that can store data wherein, 322 functions that can have activation (enable) concurrently of displacement working storage, this activation function can be explained in the back.Embodiments of the invention alternately write known two groups of inner circuit bank of electric current door bolt and framework change the becoming framework of connecting that sends the data electric current from parallel connection.
In Fig. 3, the operation of displacement working storage 322 charge control circuit cohorts 301 and circuit cohort 311 wherein has operating cycle in the first signal cycle, the second N signal cycle in signal cycle to the.Circuit bank 312 is connected with the first signal cycle end 326 of displacement working storage 322, circuit bank 314 is connected with the second signal cycle end 327 of displacement working storage 322, the N signal cycle end 328 of circuit bank 316 and displacement working storage 322 is connected, and circuit bank 302, circuit bank 304 all are connected with the activation end 324 of displacement working storage 322 with circuit bank 306.Circuit bank 302, circuit bank 304 are formed a circuit cohort 301 with circuit bank 306, and circuit bank 312, circuit bank 314 are formed another circuit cohort 311 with 316 of circuit bank.
Fig. 4 then is the time diagram (timing chart) of embodiment among Fig. 3, only enumerates the series current door bolt combination of two units, i.e. circuit bank among Fig. 3 312 and circuit bank 302, and circuit bank 314 and circuit bank 304.Can more clearly understand the mechanism of series current gate architecture operation by Fig. 4 and Fig. 3 contrast.
In Fig. 4, first signal cycle end 326 has the period of two unlatchings, is respectively time t
1To t
2Between period 412 and time t
8To t
9Between period 414, the period 412 and period pitch 416 (the time t of being separated by period 414
1To t
8).Second signal cycle end has the period of two unlatchings, is respectively time t3 to t
4Between period 422 and time t
10To t
12Between period 424, the period 422 and period pitch 426 (the time t of being separated by period 424
3To t
10).The activation end has the period of two unlatchings, is respectively time t
5To t
6Between period 432 and time t
13To t
14Between period 434, the period 432 and period pitch 436 (the time t of being separated by period 434
5To t
13).Because 326, the second signal cycle of first signal cycle end end 327 all is controlled at same cycleoperation by displacement working storage 322 with activation end 324, so this three period pitch 416,426 all equate with 436.And all a bit of time (is time t at interval between period 412, period 422 and period 432
2To t
3With time t
4To t
5), this is to be avoided because the problem of 326, the second signal cycle of first signal cycle end end 327 and the too close data current processing that produces of 324 opening times of activation end, period 414 then, period 424 and also be period 434 the same situation.
Data electric current I among Fig. 4
DataThe data electric current of expression signal input end input current door bolt comprises time t
1To t
3Data 402, time t
3To t
5Data 404, time t
8To t
10Data 406 and time t
10To t
13Data 408.Data 402,404,406 with 408 in Fig. 4 represented height only to represent them are different document signals, there is no other special meanings.The sweep trace of corresponding picture element end (scan line) in the picture element end cohort 330 (not expression among Fig. 3) can be at time t
7To t
11In time, open.The operating process of represented this series current door bolt of following key drawing 4 and Fig. 3.
Data electric current I when input
DataWhen inputing to the electric current door bolt by outside signal source, displacement working storage 322 can be opened the period 412 of first signal cycle end 326, and the capacitor C s1 of circuit bank 312 just begins to store the data electric current I of input among Fig. 3
DataData 402, displacement working storage 322 is opened the period 422 of second signal cycle end 327 then, the capacitor C s1 of circuit bank 314 just begins to store the data electric current I of input
DataData 404.Displacement working storage 322 control activation ends 324 are opened period 432 then, are stored in the voltage among the capacitor C s1 of circuit bank 312 this moment, can remove the transistor M3 of driving circuit group 312 and convert the data electric current I to
Data, data electric current I then
DataThe transistor M6 of the circuit bank of flowing through 302 is converted into voltage again and is stored among the capacitor C s2 of circuit bank 302.Circuit bank 304/314 is also operated according to this mode of foregoing circuit group 302/312 with circuit bank 306/316.Then the sweep trace of corresponding picture element end (not expression among Fig. 3) can be opened period 442 in the picture element end cohort 330, and circuit bank 302 can be done the action that writes to corresponding picture element end in the picture element end cohort 330 with circuit bank 304.
In the process of opening period 422, displacement working storage 322 can be opened the period 414 of first signal cycle end 326 again, with the data electric current I
DataData 406 be stored among the capacitor C s1 of circuit bank 312, displacement working storage 322 can be opened the period 424 of second signal cycle end 327 then, with the data electric current I
DataData 408 be stored among the capacitor C s1 of circuit bank 314.Displacement working storage 322 control activation ends 324 are opened period 434 at last, and the voltage of the capacitor C s1 in circuit bank 312 and the circuit bank 314 can be copied to respectively among each capacitor C s2 of circuit bank 302 and circuit bank 304 at this moment.
Before activation end 324 was opened period 434, the sweep trace of the plain end of last a series of paintings must close earlier that (end at t the period 442 that is sweep trace in the picture element end cohort 330
11, early than the start time t in period 434
13), otherwise the data electric current I that stores in circuit bank 312 and the circuit bank 314
Data, can when opening periods 434 of activation, directly be written into picture element end cohort 330, and can not be stored in earlier among each capacitor C s2 in circuit bank 302 and the circuit bank 304.
Therefore, in Fig. 3, circuit cohort 311 can be responsible for reception data electric current I forever
Data, and in the write circuit cohort 301, circuit cohort 301 then can be responsible for the data electric current I that receiving circuit cohort 311 sends forever
Data, and with the data electric current I
DataWrite picture element end cohort 330.And no longer be that each circuit bank all must be responsible for receiving the signal that comes and be sent to picture element end cohort 330 from outside signal source voluntarily.The embodiment of the invention among Fig. 3 is the configuration of current sink type, this data electric current I
DataInput, be actually from picture element end cohort 330 and extract the data electric current I
Data, so this data electric current I
DataThe data electric current I of transmission direction meeting and current source (current source) circuit arrangement
DataTransmission direction opposite.
Under the framework of this series current door bolt circuit arrangement, also has an extra benefit.The parallel-current door bolt framework that Sony company proposes, the activation switch motion that activation device wherein is responsible for, when a circuit cohort will write picture element end cohort therein, must maintain the state of unlatching always, and polyphone electric current door bolt framework of the present invention then only needs the period signal of a unlatching to get final product, and that is to say, the function of activation can be included in the displacement working storage, is periodically operated the execution of activation switch motion by the displacement working storage.
Fig. 5 then is an another embodiment of the present invention.Circuit bank 502 and circuit bank 512 are with seven thin film transistor (TFT) M1-M7 among Fig. 5, and the electric current of the current sink type of two capacitor C s1, Cs2 and a unit of displacement working storage 522 compositions is fastened circuit framework with a bolt or latch.Capacitor C s1 and the Cs2 electric current I that can store data wherein
Data, displacement working storage 522 has the function of activation.In Fig. 5, circuit bank 512 is connected with the signal cycle end 526 of displacement working storage 522, and the operating cycle in a signal cycle is wherein arranged, and circuit bank 502 is connected with the activation end 524 of displacement working storage 522.
This embodiment also is the circuit arrangement of current sink type, and the electric current door bolt circuit framework of only enumerating a unit is used as representative, and the displacement working storage 522 of therefore being responsible for this unitary current door bolt of operation also has only a signal cycle end 526.When unitary current door bolt not only the time, displacement working storage 522 also can expand thereupon is responsible for a plurality of unitary currents door bolts of operation.
Data electric current I when input
DataInput to electric current when door bolt by outside signal source, signal cycle end 526 is opened by displacement working storage 522, utilizes the capacitor C s1 of circuit bank 512 among Fig. 5 to store the data electric current I of input
DataBy the time after capacitor C s1 had stored, activation end 524 was by displacement working storage 522 control, and then the signal cycle holds 526 back to open, and was stored in the voltage among the capacitor C s1 of circuit bank 512 this moment, can remove the transistor M3 of driving circuit group 512 and converted the data electric current I to
Data, data electric current I then
DataThe transistor M6 of the circuit bank of flowing through 502 is converted into voltage again and is stored among the capacitor C s2 of circuit bank 502.Then the sweep trace of corresponding picture element end (not expression among Fig. 5) is opened in the picture element end cohort 530, and circuit bank 502 can be done the action that writes to corresponding picture element end in the picture element end cohort 530, and when writing, signal cycle end 526 is opened again, with the data electric current I
DataBe stored in once more among the Cs1 of circuit bank 512, repeat above-described action afterwards.
Fig. 6 then is an another embodiment of the present invention.Circuit bank 602 and circuit bank 612 are with seven thin film transistor (TFT) M1-M7 among Fig. 6, and the electric current of the types of current sources of two capacitor C s1, Cs2 and a unit of displacement working storage 622 compositions is fastened circuit framework with a bolt or latch.Capacitor C s1 and the Cs2 electric current that can store data wherein, displacement working storage 622 has the function of activation.Circuit bank 612 is connected with the signal cycle end 626 of displacement working storage 622, and the operating cycle in a signal cycle is wherein arranged, and circuit bank 602 is connected with the activation end 624 of displacement working storage 622.
This embodiment is the circuit arrangement of types of current sources, and the electric current door bolt circuit framework of only enumerating a unit is used as representative, and the displacement working storage 622 of therefore being responsible for this unitary current door bolt of operation also has only a signal cycle end 626.When unitary current door bolt not only the time, displacement working storage 622 also can expand thereupon is responsible for a plurality of unitary currents door bolts of operation.
Data electric current I when input
DataInput to electric current when door bolt by outside signal source, signal cycle end 626 is opened by displacement working storage 622, utilizes the capacitor C s1 of circuit bank 612 among Fig. 6 to store the data electric current I of input
DataBy the time after capacitor C s1 had stored, activation end 624 was by displacement working storage 622 control, and then the signal cycle holds 626 back to open, and was stored in the voltage among the capacitor C s1 of circuit bank 612 this moment, can remove the transistor M3 of driving circuit group 612 and converted the data electric current I to
Data, data electric current I then
DataThe transistor M6 of the circuit bank of flowing through 602 is converted into voltage again and is stored among the capacitor C s2 of circuit bank 602.Then the sweep trace (not shown) of corresponding picture element end is opened in the picture element end cohort 630, and circuit bank 602 can be done the action that writes to corresponding picture element end in the picture element end cohort 630, and when writing, signal cycle end 626 is opened again, with the data electric current I
DataBe stored in once more among the Cs1, afterwards repeat above-described action.
No matter these three embodiment have illustrated it is the collocation method of current source or current sink, as long as the circuitry lines and the outside signal source that join with the time cycle of displacement working storage are joined, then join with the circuit bank that the activation end of displacement working storage joins with picture element end cohort, and these two circuit bank are to be connected in the mode of connecting, and just can be used as employed circuit bank among the present invention.And the various electronic component arrangements in each circuit bank are not limited to shown in the cited embodiment.
By the invention described above preferred embodiment as can be known, Fig. 2 of the parallel-current door bolt framework that Fig. 3 of series current door bolt framework of the present invention and Sony company propose relatively has the following advantages;
One, reduces the temporary lid of one group of displacement.In Fig. 2, need two displacement working storages 208 and displacement working storage 218, and in Fig. 3, only need a displacement working storage 322.
Two, the action that does not need extra many switches (switch) to come switch current door bolt (current latch).In Fig. 2, need activation device 209 and activation device 219, and in Fig. 3, only need an activation end 324, and this activation function is to be provided by displacement working storage 322.
Three, do not need extra many two signal line to control the action of door bolt.Enable-A in Fig. 2 and Enable-B must provide in addition, can't directly be provided by displacement working storage 322 in the image pattern 3.
Four, reduce by a TFT.The circuit of each group unitary current door bolt needs eight TFT to drive among Fig. 2, and the circuit of each group unitary current door bolt only needs seven TFT to drive among Fig. 3.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, in not breaking away from each spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (6)
1, a kind of device of data line transmission circuit of current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current source, it is characterized in that comprising at least:
One displacement working storage (622) has an at least one period signal end (626) and an activation end (624);
One first circuit cohort is made up of at least one first circuit bank (612) with storaging current function, and this first circuit bank (612) is by this period signal end (626) control, to receive this data electric current that this signal source, outside is produced; And
One second circuit cohort, form by at least one second circuit group (602) with storaging current function, the current input terminal of this second circuit group (602) is electrically connected at the current output terminal of this first circuit bank (612), and this second circuit group (602) is duplicated from this first circuit bank (612) by this activation end (624) control and sent this data electric current again to this picture element end cohort (630);
Wherein, described first circuit bank (612) and second circuit group (602) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (622) is formed the types of current sources of a unit,
Described first circuit bank (612) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (626) of described displacement working storage (622) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
SS,
Described second circuit group (602) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), and is connected to the activation end (624) of displacement working storage (622) jointly; Second pin of the 4th thin film transistor (TFT) (M4) is connected with first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), and is connected to picture element end cohort (630) jointly; Second pin of the 5th thin film transistor (TFT) (M5) connects first end of second electric capacity (Cs2) and the grid of the 6th thin film transistor (TFT) (M6); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2), and is connected to power end V jointly
DD
2, the device of the data line transmission circuit of current drives electro-exciting light-emitting display according to claim 1, it is characterized in that: when this first circuit cohort is made up of a plurality of these first circuit bank (612), and this second circuit cohort is by a plurality of these second circuit groups (602) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (612) are in regular turn respectively by a plurality of these period signal end (626) controls, to receive a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (602) by this activation end (624) control, after those first circuit bank (612) are duplicated those data electric currents respectively in regular turn, send those data electric currents respectively to this picture element end cohort (630) in regular turn more in regular turn.
3. the device of the data line transmission circuit of a current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current sink, it is characterized in that comprising at least:
One displacement working storage (322) has an at least one period signal end (326) and an activation end (324);
One first circuit cohort (311) is made up of at least one first circuit bank (312) with storaging current function, and this first circuit bank is by this period signal end (326) control, to send this data electric current to this signal source, outside; And
One second circuit cohort (301), form by at least one second circuit group (302) with storaging current function, the current output terminal of this second circuit group (302) is electrically connected at the current input terminal of this first circuit bank (312), and this second circuit group (302) is duplicated from this first circuit bank (312) by this activation end (324) control again and received this data electric current from this picture element end cohort (330);
Wherein, described first circuit bank (312) and second circuit group (302) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (322) is formed the current sink type of a unit,
Described first circuit bank (312) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (326) of described displacement working storage (322) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
DD,
Described second circuit group (302) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), and is connected to the activation end (324) of described displacement working storage (322) jointly; Second pin of the 4th thin film transistor (TFT) (M4) connects first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6); Second pin of the 5th thin film transistor (TFT) (M5) is connected with the grid of the grid of the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and first end of second electric capacity (Cs2); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2) and first pin of the 7th thin film transistor (TFT) (M7), and is connected to power end V jointly
SSSecond pin of the 7th thin film transistor (TFT) (M7) connects picture element end cohort (330).
4, the device of the data line transmission circuit of current drives electro-exciting light-emitting display according to claim 3, it is characterized in that: when this first circuit cohort is made up of a plurality of these first circuit bank (312), and this second circuit cohort is by a plurality of these second circuit groups (302) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (312) are in regular turn respectively by a plurality of these period signal end (326) controls, to send a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (302) by this activation end (324) control, after those first circuit bank (312) are duplicated those data electric currents respectively in regular turn, receive those data electric currents from this picture element end cohort (330) respectively in regular turn more in regular turn.
5. the device of the data line transmission circuit of a current drives electro-exciting light-emitting display, receive at least one data electric current with cause one outside signal source, and drive a picture element end cohort of an electro-exciting light-emitting display, the circuit arrangement of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display is the circuit arrangement of current sink, it is characterized in that comprising at least:
One displacement working storage (522) has an at least one period signal end (526) and an activation end (524);
One first circuit cohort is made up of at least one first circuit bank (512) with storaging current function, and this first circuit bank (512) is by this period signal end (526) control, to send this data electric current to this signal source, outside; And
One second circuit cohort, form by at least one second circuit group (502) with storaging current function, the current output terminal of this second circuit group (502) is electrically connected at the current input terminal of this first circuit bank (512), and this second circuit group (502) is duplicated from this first circuit bank (512) by this activation end (524) control again and received this data electric current from this picture element end cohort (530);
Wherein, described first circuit bank (512) and second circuit group (502) are fastened circuit framework with a bolt or latch with the electric current that described displacement working storage (522) is formed the current sink type of a unit;
Described first circuit bank (512) comprises the first film transistor (M1), second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and first electric capacity (Cs1), and the grid of the first film transistor (M1) connects the grid of second thin film transistor (TFT) (M2), and is connected to the period signal end (526) of described displacement working storage (522) jointly; First pin of the first film transistor (M1) connects described outside signal source, and second pin is connected with first pin of second thin film transistor (TFT) (M2), the 3rd thin film transistor (TFT) (M3) and the 4th thin film transistor (TFT) (M4); Second pin of second thin film transistor (TFT) (M2) connects first end of first electric capacity (Cs1) and the grid of the 3rd thin film transistor (TFT) (M3); Second pin of the 3rd thin film transistor (TFT) (M3) connects second end of first electric capacity (Cs1), and is connected to power end V jointly
DD,
Described second circuit group (502) comprises the 4th thin film transistor (TFT) (M4), the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6), the 7th thin film transistor (TFT) (M7) and second electric capacity (Cs2), and the grid of the 4th thin film transistor (TFT) (M4) connects the grid of the 5th thin film transistor (TFT) (M5), the 7th thin film transistor (TFT) (M7), and is connected to the activation end (524) of described displacement working storage (522) jointly; Second pin of the 4th thin film transistor (TFT) (M4) connects first pin of the 5th thin film transistor (TFT) (M5), the 6th thin film transistor (TFT) (M6) and the 7th thin film transistor (TFT) (M7); Second pin of the 5th thin film transistor (TFT) (M5) is connected with the grid of the 6th thin film transistor (TFT) (M6) and first end of second electric capacity (Cs2); Second pin of the 6th thin film transistor (TFT) (M6) connects second end of second electric capacity (Cs2), and is connected to power end V jointly
SSSecond pin of the 7th thin film transistor (TFT) (M7) connects picture element end cohort (530).
6, the device of the data line transmission circuit of current drives electro-exciting light-emitting display according to claim 5, it is characterized in that: when this first circuit cohort is made up of a plurality of these first circuit bank (512), and this second circuit cohort is by a plurality of these second circuit groups (502) when forming, and the sequence of operation of the device of the data line transmission circuit of this current drives electro-exciting light-emitting display comprises at least:
Those first circuit bank (512) are in regular turn respectively by a plurality of these period signal end (526) controls, to send a plurality of these data electric currents respectively in regular turn;
Those second circuit groups (502) by this activation end (524) control, after those first circuit bank (512) are duplicated those data electric currents respectively in regular turn, receive those data electric currents from this picture element end cohort (530) respectively in regular turn more in regular turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031221181A CN100437700C (en) | 2003-04-21 | 2003-04-21 | Unit of transmission circuit for data wire of light display excited by electricity driven through electrical current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031221181A CN100437700C (en) | 2003-04-21 | 2003-04-21 | Unit of transmission circuit for data wire of light display excited by electricity driven through electrical current |
Publications (2)
| Publication Number | Publication Date |
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| CN1540611A CN1540611A (en) | 2004-10-27 |
| CN100437700C true CN100437700C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031221181A Expired - Fee Related CN100437700C (en) | 2003-04-21 | 2003-04-21 | Unit of transmission circuit for data wire of light display excited by electricity driven through electrical current |
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| CN111916027B (en) * | 2019-05-09 | 2022-08-23 | 京东方科技集团股份有限公司 | Pixel circuit and driving method thereof, display panel and driving method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020190944A1 (en) * | 2001-05-24 | 2002-12-19 | Akira Morita | Scan-driving circuit, display device, electro-optical device, and driving method of the scan-driving circuit |
| CN1404600A (en) * | 2000-11-07 | 2003-03-19 | 索尼公司 | Active matrix display and active matrix organic electroluminescence display |
| CN1608280A (en) * | 2001-10-31 | 2005-04-20 | 株式会社半导体能源研究所 | Signal line drive circuit and light emitting device |
-
2003
- 2003-04-21 CN CNB031221181A patent/CN100437700C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404600A (en) * | 2000-11-07 | 2003-03-19 | 索尼公司 | Active matrix display and active matrix organic electroluminescence display |
| US20020190944A1 (en) * | 2001-05-24 | 2002-12-19 | Akira Morita | Scan-driving circuit, display device, electro-optical device, and driving method of the scan-driving circuit |
| CN1608280A (en) * | 2001-10-31 | 2005-04-20 | 株式会社半导体能源研究所 | Signal line drive circuit and light emitting device |
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