CN105206224B - A kind of display system with feedback channel - Google Patents

A kind of display system with feedback channel Download PDF

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Publication number
CN105206224B
CN105206224B CN201510618674.2A CN201510618674A CN105206224B CN 105206224 B CN105206224 B CN 105206224B CN 201510618674 A CN201510618674 A CN 201510618674A CN 105206224 B CN105206224 B CN 105206224B
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China
Prior art keywords
feedback channel
signal
pixel cell
display
pole
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CN201510618674.2A
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Chinese (zh)
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CN105206224A (en
Inventor
林兴武
张盛东
冷传利
王翠翠
孟雪
张敏
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北京大学深圳研究生院
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Priority to CN201510618674.2A priority Critical patent/CN105206224B/en
Publication of CN105206224A publication Critical patent/CN105206224A/en
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Publication of CN105206224B publication Critical patent/CN105206224B/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/28Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part
    • H01L27/32Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including components using organic materials as the active part, or using a combination of organic materials with other materials as the active part with components specially adapted for light emission, e.g. flat-panel displays using organic light-emitting diodes [OLED]

Abstract

This application discloses a kind of display system with feedback channel, the control terminal of its feedback channel receives gating signal, for gating the feedback channel;The first end of the feedback channel is connected to the drive circuit or light emitting diode of a pixel cell, for receiving the aging signal of this pixel cell;Second end of the feedback channel is connected to the second pole of the switching transistor of another pixel cell, for when the feedback channel is strobed by the pole of switching transistor second of aging signal output to another pixel cell, so that the aging signal is transferred into the display signal line being extremely connected with this switching transistor first by this switching transistor, so as to which aging signal be transferred out by display signal line.Therefore, the application both realizes feedback aging signal, again without the load of increase display signal line.

Description

A kind of display system with feedback channel

Technical field

The application is related to display technology field, and in particular to a kind of display system with feedback channel.

Background technology

Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) is because luminous with high brightness, height It is the advantages that efficiency, wide viewing angle and low-power consumption, widely studied by people in recent years, and the display system of a new generation is applied to rapidly It is central.The type of drive of Organic Light Emitting Diode is divided into passive waked-up (Passive Matrix OLED, PMOLED) and had Two kinds of source matrix driving (Active Matrix OLED, AMOLED).Although the mode cost of passive waked-up is cheap, Cross-talk phenomenon be present thus high-resolution display can not be realized, in addition, passive waked-up electric current is big, can reduce organic The service life of light emitting diode.By contrast, the mode of driven with active matrix is on each pixel cell of picture element matrix The different transistor of number is set so as to avoid cross-talk, to realize high-resolution display as current source, it is active in addition Matrix driving electric current is again smaller, and power consumption is relatively low, makes the life-span of Organic Light Emitting Diode increase.

The pixel cell of one of which driven with active matrix is two TFTs (Thin Film Transistor, TFT) structure, the pixel cell includes driving transistor, switching transistor, storage capacitance and organic light emission two Pole pipe.Show address signals of the switching transistor response from display address wire, sample the signal from display signal line.Storage Electric capacity preserves the signal voltage of sampled display signal line after the shut-off of display switch transistor.Driving transistor is given The input voltage that is retained during luminous according to storage capacitance supplies output current.Organic Light Emitting Diode is self-driven by coming The output current of transistor sends the light that the signal of its brightness and display signal line matches.According to TFT Voltage x current formula, driving current IDSIt can be expressed as:

IDS=1/2 μnCoxW/L(VG-VOLED-VTH)2……(1)

Wherein, IDSThe drain current of source electrode, μ are flowed to for the drain electrode of driving transistornFor having for TFT Imitate mobility, CoxFor the gate capacitance of TFT unit area, W is that effective raceway groove of TFT is wide Degree, L be TFT length of effective channel, VGFor the grid voltage of TFT, VOLEDIt is organic Bias voltage on light emitting diode, VTHFor the threshold voltage of TFT, VOLEDWith Organic Light Emitting Diode OLED threshold voltage is related.

The structural circuit of two TFTs of the pixel cell of above-mentioned driven with active matrix, though this circuit It is so simple, but over time, element meeting aging, especially driving transistor therein and Organic Light Emitting Diode can be old Change, direct result is exactly that the threshold voltage of driving transistor and Organic Light Emitting Diode can all produce drift, and picture element matrix In the driving transistor of pixel cell and the threshold voltage shift situation of Organic Light Emitting Diode are also different everywhere;Separately Outside, because TFT is made of polycrystalline silicon material, so as to which the drive of each pixel cell in picture element matrix can be caused The threshold voltage V of dynamic transistorTHCharacteristic with inhomogeneities;Both the above situation, understood according to formula (1), driving current IDSAt this moment it can all change, so will result in the inhomogeneities that picture element matrix is shown.

The pixel brought for the threshold voltage shift and inhomogeneities of this driving transistor and Organic Light Emitting Diode Matrix shows the problem of uneven, occurs the method that two classes compensate to threshold voltage at present:Compensated in pixel cell and outer Enclose compensation.Compensation is exactly to provide a perseverance by complicated pixel unit circuit structure for Organic Light Emitting Diode in pixel cell Fixed driving current, the circuit of this method is not only complicated, and circuit complexity can further cause the opening of pixel cell Rate and yield decline;Offset peripheral can use simpler pixel cell structure for comparing, therefore be more suitable for industrialization and answer With.

The method of offset peripheral, the ageing information of each pixel cell is typically first obtained, further according to ageing information to each picture The display signal of plain unit compensates correction, and exact image video information is included through overcompensation so as to be provided for each pixel cell Simulative display signal.The signal for including ageing information of each pixel cell, generally by a pixel for being connected to adjacent column What the feedback channel of unit display signal line passed, as shown in figure 1, feedback channel one end is connected to pixel cell, it is used for The ageing information of this pixel cell is collected, the other end is connected to the display signal line DATA of the pixel cell of adjacent column (in figure only The 1st row and the 2nd row of the i-th row are write out, this is only intended to illustrate), when feedback channel is by FB [i] signal gating, it is possible to By the ageing information of the pixel cell of the i-th row the 1st row, passed by the display signal line DATA [2] of the row pixel cell of the i-th row the 2nd Pass away.Assuming that the display screen of 768 rows, every display signal line is natively ined succession the switch crystal of 768 pixel cells Pipe Q1, now due to feedback channel, just again more 768 loads of every display signal line, this causes the load of display signal line Excessively, the performance of display screen is very influenceed.

The content of the invention

To solve the above problems, the application provides a kind of display system with feedback channel, the feedback channel of introducing is not The load of display signal line can be increased.

The display system with feedback channel that the application provides, including:

Pixel cell, the pixel cell include light emitting diode, the drive circuit for driving the light emitting diode With the switching transistor for gating the pixel cell;Wherein, the control pole of switching transistor is electrically connected to display address letter Number line, the first pole are electrically connected to display signal line, and the second pole is electrically connected to the drive circuit;

Further, in addition to:

Feedback channel, there is first end, the second end and control terminal;The control terminal of the feedback channel receives gating signal, For gating the feedback channel;The first end of the feedback channel is connected to the drive circuit or light-emitting diodes of a pixel cell Pipe, for receiving the aging signal of this pixel cell;Second end of the feedback channel is connected to the switch of another pixel cell Second pole of transistor, for when the feedback channel is strobed by aging signal output opening to another pixel cell The pole of transistor second is closed, is extremely connected with this switching transistor first with being transferred to the aging signal by this switching transistor Display signal line, so that aging signal be transferred out by display signal line.

In a preferred embodiment, the display system with feedback channel, in addition to:

Picture element matrix, the picture element matrix described in the N rows M row pixel cell, N rows including showing address wire and M row institute Display signal line is stated, pixel cell and respective display address wire, display signal line connect respectively, and N and M are positive integer;

Row scanner driver, for by show address wire to picture element matrix send show address signals, with a frame Each row pixel cell is gated successively;

Row driver, for sending simulative display signal, the simulative display letter to picture element matrix by display signal line Number it is used to provide the display data that includes image/video information for pixel cell;And for receiving picture by display signal line The aging signal of prime matrix feedback.

In a preferred embodiment, the pixel cell of the feedback channel first end connection, with this end of feedback channel second The pixel cell of connection, it is located at same a line adjacent column of picture element matrix;Or its to be located at the adjacent lines of picture element matrix adjacent Row.

In a preferred embodiment, the feedback channel includes a switching transistor, the first pole of the switching transistor, Second pole and control pole are respectively the first end of the feedback channel, the second end and control terminal.

In a preferred embodiment, with the feedback channel of a line odd column, its control terminal all receives one independently of explicitly The same strobe signal of location signal;With the feedback channel of a line even column, its control terminal all receives another independently of display address The same strobe signal of signal;

Or

With the feedback channel of a line odd column, the show address signals that its control terminal all receives a non-one's own profession are believed as gating Number;With the feedback channel of a line even column, its control terminal all receives the show address signals of another non-one's own profession as gating signal.

In a preferred embodiment, the aging signal includes in pixel cell driving transistor in drive circuit, luminous The original threshold voltages inequality information of diode;And driving transistor, light emitting diode be after usage in drive circuit Threshold voltage variation information.

In a preferred embodiment, the period of the feedback channel between frames, by the aging signal of pixel cell The row driver is passed to by the display signal line of the pixel cell of adjacent column.

In a preferred embodiment, the row driver includes display signal generator module/correction signal generation module, uses In the period between frames, simulative display signal/simulation through overcompensation is sent to picture element matrix by display signal line Correction signal, to drive pixel cell to produce aging signal.

In a preferred embodiment, the row driver includes aging signal monitoring module, for passing through display signal line Receive and analyze the aging signal of feedback.

In a preferred embodiment, the pixel cell is the pixel cell of current programmed type or voltage-programming type.

The beneficial effect of the application is:

According to the display system with feedback channel of above-mentioned implementation, because the first end of feedback channel is connected to a pixel list The drive circuit or light emitting diode of member, for receiving the aging signal of this pixel cell;Second end of the feedback channel connects Be connected to the second pole of the switching transistor of another pixel cell, for when the feedback channel is strobed by aging signal output To the pole of switching transistor second of another pixel cell, with by this switching transistor by the aging signal be transferred to The extremely connected display signal line of this switching transistor first, driven so as to which aging signal is transferred into the row by display signal line Dynamic device, therefore the second end of feedback channel is not to be directly coupled on display signal line, so both realizes feedback aging signal, Again without the load of increase display signal line.

According to the display system with feedback channel of above-mentioned implementation, due to the feedback channel between frames when Section, the row driver is passed to by the display signal line for the pixel cell that the aging signal of pixel cell passes through adjacent column, because This does not interfere with the display operation in frame not only, and also improves the speed of feedback aging signal.

Brief description of the drawings

Fig. 1 is the connection diagram of traditional feedback channel;

Fig. 2 is the structural representation of the display system in a kind of embodiment of the application with feedback channel;

Fig. 3 (a) and two kinds of structural representations that (b) is pixel cell in a kind of embodiment of the application;

Fig. 4 (a) and two kinds of circuit diagrams that (b) is pixel cell in the application another kind embodiment;

Fig. 5 (a) and two kinds of connection signals that (b) is the feedback channel of the i-th row pixel cell in a kind of embodiment of the application Figure;

Fig. 6 (a), (b), (c) and (d) are four of the feedback channel of the i-th row pixel cell in the application another kind embodiment Kind connection diagram;

Fig. 7 is the display time sequential routine figure of the display system in a kind of embodiment of the application with feedback channel.

Embodiment

The application is described in further detail below by embodiment combination accompanying drawing.

Fig. 2 is refer to, the application proposes a kind of display system with feedback channel, and in one embodiment, it includes picture Prime matrix 110, row scanner driver 120 and row driver 130.

Picture element matrix 110 includes N row M row pixel cell 10, N rows show address wire SEL [1]~SEL [N] and M row Display signal line DATA [1]~DATA [M], pixel cell 10 and respective display address wire, display signal line connect respectively, N It is positive integer with M.6 pixel cells 10 have been drawn in Fig. 2, have been only used for illustrating, not with the quantity for limiting pixel cell 10.

As shown in Fig. 3 (a) and (b), pixel cell 10 includes light emitting diode OLED, for driving light emitting diode OLED Drive circuit 11 and switching transistor Q1 for gating pixel cell 10, wherein, switching transistor Q1 control pole electricity is (i.e. Grid) show address signals line is connected to, the first pole is electrically connected to display signal line, and the second pole is electrically connected to above-mentioned drive circuit 11.Drive circuit 11 is that stable electric current is provided to light emitting diode OLED, and size of current is that basis is write by display signal line Depending on the size of simulative display signal for entering pixel cell 10, in one embodiment, such as Fig. 4 (a) and (b), drive circuit 11 wraps Include with driving transistor Q2 and storage capacitors C, at this moment, switching transistor Q1 the second pole and driving transistor Q2 control pole electricity Connection.In one embodiment, pixel cell 10 can be the pixel cell of current programmed type, and its signal being related to all is believed for electric current Number, i.e., signal is all to be used as sign using current value;In another embodiment, pixel cell 10 can also be the picture of voltage-programming type Plain unit, its signal being related to all are voltage signal, i.e., signal is all to be used as sign using magnitude of voltage.Certainly, this Shen is not being departed from Concept please, the signal in pixel cell 10 can also be other types, not enumerate herein.

Row scanner driver 120 is used to show that address wire sends show address signals to picture element matrix 110 by N rows, with Each row pixel cell 10 is gated successively in a frame, so as to receive the simulative display signal that row driving 130 is sent.Row turntable driving The waveform for the show address signals that device 120 is sent, can be square wave or other waveforms.Specific waveform is according to tool Depending on the image element circuit of body, it is also possible to except display address wire also has other control lines.

Row driver 130 is used to send simulative display signal to picture element matrix 110 by M row display signal line, this simulation Display signal is used to provide the display data for including image/video information for pixel cell 10.The present embodiment simulative display signal is Voltage signal, other pixel cells are also likely to be current signal.Row driver 130 is additionally operable to receive pixel by display signal line The aging signal that matrix 110 feeds back.

In one embodiment, shifted turning back to reference picture 2, row driver 130 including the first shift registor 131, second Buffer 132, the 3rd shift registor 133, display signal generator module 134 and aging signal monitoring module 135.First displacement Buffer 131, digital displaying signal, the digital compensation signal of the difference serial received input of the second shift registor 132, work as reception The digital displaying signal and digital compensation signal of complete line pixel cell 10, the first shift registor 131, the second shift registor 132 are forwarded to digital displaying signal, digital compensation signal display signal generator module 134 together parallel, and display signal produces Module 134 exports the simulative display signal once overcompensation to display signal line, so as to drive pixel cell 10.One preferably In embodiment, display signal generator module 134 comprises at least the digital-to-analogue conversion module ADC with Gamma correction.Aging signal monitoring Module 135 is used for the aging signal that feedback is received and analyzed by display signal line.In one embodiment, aging signal bag Containing driving transistor, light emitting diode OLED original threshold voltages inequality information in drive circuit 11 in pixel cell 10; And the threshold voltage variation information of driving transistor, light emitting diode OLED after usage in drive circuit 11.3rd moves Position buffer 133 be used for parallel memorizing aging signal monitoring module 135 result Serial output gives other modules again, for example, defeated Go out to calculate the module (being not drawn into figure) of digital compensation signal amount according to monitoring result to one.

In one preferably embodiment, the period of display signal generator module 134 between frames in driver, lead to Cross display signal line and send the simulative display signal through overcompensation as analog correction signal to picture element matrix 110, to drive picture Plain unit 10 produces aging signal.In another preferably embodiment, row driver includes correction signal generation module (in figure not Draw), for the period between frames, analog correction signal is sent to picture element matrix 110 by display signal line, to drive Dynamic pixel cell produces aging signal.

The display system with feedback channel of the application, in addition to feedback channel 20.Feedback channel 20 have first end, Second end and control terminal;The control terminal of feedback channel 20 receives gating signal, for gating feedback channel 20;Feedback channel 20 First end is connected to the drive circuit 11 or light emitting diode OLED of a pixel cell 10, for receiving the old of this pixel cell 10 Change signal;It should be noted that the first end of feedback channel 20 can directly be electrically connected to the drive circuit 11 of pixel cell 10 Or light emitting diode OLED or be indirectly connected with, for example, the first end of feedback channel 20 is connected to a photo-sensitive cell, lead to Cross this photo-sensitive cell and light-emitting diodes light OLED optical signal is changed into the first end that electric signal is input to feedback channel 20, from And feedback channel 20 is collected into aging signal.Second end of feedback channel 20 is connected to the switching transistor of another pixel cell 10 Q1 the second pole, for the switch crystal when feedback channel 20 is strobed by aging signal output to this another pixel cell 10 Pipe Q1 the second pole, so that aging signal is transferred into what is be extremely connected with this switching transistor Q1 first by this switching transistor Q1 Display signal line, so as to which aging signal is transferred into row driver 130 by display signal line.In one preferably embodiment, The pixel cell 10 of the first end of feedback channel 20 connection, the pixel cell 10 being connected with this end of feedback channel 20 second, the two Pixel cell 10 is located at same a line adjacent column of picture element matrix 110;In further embodiments, above-mentioned two pixel cell 10, It is located at the adjacent lines adjacent column of picture element matrix 110.It should be noted that in some embodiments of the application, aging signal be from The first end of feedback channel 20 flows to the second end, in other embodiment, feedback channel 20 be also used as from its second End flows to the signalling channel of first end.

In one preferably embodiment, as shown in Fig. 5 (a), feedback channel 20 includes a switching transistor Q3, switchs crystal Pipe Q3 the first pole, the second pole and control pole is respectively the first end of feedback channel 20, the second end and control terminal.In an embodiment In, with the feedback channel 20 of a line odd column, its control terminal all receives a same strobe signal independently of show address signals; With the feedback channel 20 of a line even column, its control terminal all receives another same strobe signal independently of show address signals, For example, the feedback channel 20 of the odd column of the i-th row, its control terminal receives the gating signal FB1 independently of show address signals [i], the feedback channel 20 of the even column of the i-th row, its control terminal receive the gating signal FB2 [i] independently of show address signals. In another embodiment, as shown in Fig. 5 (b), with the feedback channel 20 of a line odd column, its control terminal all receives a non-one's own profession Show address signals are as gating signal;With the feedback channel 20 of a line even column, its control terminal all receives another non-one's own profession Show address signals are as gating signal, for example, the feedback channel 20 of the odd column of the i-th row, its control terminal receives the i-th -1 row Show address signals SEL [i-1], and the feedback channel 20 of the even column of the i-th row, its control terminal receive the i-th -2 row explicitly Location signal SEL [i-2], in order that as i=1, i.e. the control terminal of the feedback channel 20 of the first row can also receive explicitly Location signal, display can be sent respectively plus the virtual show address signals line of two rows before the first row show address signals Address signal SEL [0] and SEL [- 1].

In above-mentioned Fig. 5, Fig. 5 (a) display address wire and the control terminal of feedback channel 20 are signals independent mutually Line, the i.e. gating signal of feedback channel 20 are independently of show address signals, so the picture element matrix 110 shown in Fig. 5 (a) exists Display operation in frame is not influenceed by feedback operation, feedback operation between frames, also can only influence the picture of one's own profession Plain unit 10, any influence will not be produced on the pixel cell 10 of other rows.

In Fig. 5 (b), when operation is shown in frame, when being shown to the i-th -1 row, the meeting of odd column feedback channel 20 of the i-th row Be strobed, so as to the pixel cell 10 of the even column of the i-th row it is stored simulative display signal be contaminated;I+1 row Even column feedback channel 20 can be strobed, the simulative display signal stored so as to the pixel cell 10 of the odd column of i+1 row It is contaminated, but contaminated pixel cell at most maintains the time of 2 rows, and normal display influence can be ignored not Meter.And in Fig. 5 (b), during feedback operation between frames, for example, feeding back the old of the pixel cell 10 of the i-th row odd column When changing signal, the display signal generator module 134 of row driving 130 first sends the simulative display signal compensated as simulation school Positive signal writes the pixel cell 10 of the odd column of the i-th row, to produce corresponding aging signal, passes through show address signals afterwards SEL [i-1] gates the feedback channel 20 of the i-th row odd column, is passed with above-mentioned caused aging signal;Similarly, anti- It is that the i-th row even number is gated by show address signals SEL [i-2] when presenting the aging signal of the pixel cell 10 of the i-th row even column The feedback channel 20 of row.Due to during this, having used show address signals SEL [i], SEL [i-1] and SEL [i-2], because This, i-th, the simulative display signal that stores of the pixel cell 10 of i-1, i-2 row be contaminated, so finishing the picture of the i-th row It is after the feedback operation of plain unit 10, then by increasing display operation, the i-th -2 impacted, i-1 and i rows pixel cell 10 is right The simulative display signal answered writes back.

In further embodiments, as shown in Fig. 6 (a), feedback channel 20 includes two switching transistors, that is, switchs crystal Pipe Q4 and switching transistor Q5, switching transistor Q4 the second pole are extremely connected with the first of switching transistor Q5, switching transistor Q4 the first pole, switching transistor Q5 the second pole are respectively the first end of feedback channel 20, the second end, the control of feedback channel 20 End processed includes switching transistor Q4 control pole and switching transistor Q5 control pole.In one embodiment, it is strange with a line The feedback channel 20 of ordered series of numbers, its transistor Q4 control pole receive the show address signals of a non-one's own profession;With a line even column Feedback channel 20, its transistor Q4 control pole receive the show address signals of another non-one's own profession, its transistor Q5 control pole The show address signals of one's own profession are received, for example, in one embodiment, the feedback channel 20 of the i-th row, its transistor Q5 control The show address signals SEL [i] of reception one's own profession in pole processed, and the feedback channel 20 of the i-th row odd column, even column, its transistor Q4 Control pole receive show address signals SEL [i+1], SEL [i+2] respectively.In some other embodiments, feedback channel 20 More than two switching transistors can also be included, structure is similar with the gating signal of control pole, repeats no more herein.

It should be noted that in order that the aging signal of pixel cell 10 of last row can also pass, Ke Yizeng Add a display signal line DATA [M+1], make last pixel cell 10 arranged feds back through 20 by this display signal Line DATA [M+1] sends aging signal to row driver 130.

When operation is shown in frame, row scanner driver 120 gates pixel cell 10, the display address of upper and lower two row line by line Semaphore request can not be overlapping.When showing the i-th row pixel cell 10, the switching transistor Q5 of the i-th row feedback channel 20 is led to by road, But now switching transistor Q4 is off, so the feedback channel 20 of the i-th row will not be strobed when showing and operating.Now Switching transistor Q4 on some feedback channels 20 of i-th -1 row can be switched on, but opening on the feedback channel 20 of the i-th -1 row Close what transistor Q5 was off, so the feedback channel 20 of the i-th -1 row will not be also strobed, so the pixel cell of the i-th -1 row The 10 simulative display signals stored will not be contaminated.

During feedback operation between frames, row scanner driver 120 needs to be simultaneously emitted by the i-th row and i+1 row Show address signals can just gate the feedback channel 20 of the i-th row odd column, so as to by the pixel cell 10 of the i-th row odd column Aging signal passes, and equally, row scanner driver 120 needs to be simultaneously emitted by the show address signals of the i-th row and the i-th+2 row The feedback channel 20 of the i-th row even column can be just gated, so as to by the aging signal transmission of the pixel cell 10 of the i-th row even column Go out.If in one embodiment, the show address signals of upper and lower two row occur overlapping situation, and are separated by the display of two rows Address signal be it is nonoverlapping, the odd column of that the i-th row, the feedback channel 20 of even column switching transistor Q4 control signal Show address signals SEL [i+2], SEL [i+4] will be used respectively, as shown in Fig. 6 (b).

As shown in Fig. 6 (c), the control pole of the switching transistor Q4 in the feedback channel 20 of the i-th row odd column and even column The display address wire of i-th -1, i-2 rows can also be connected respectively, and the same Fig. 6 (a) of principle is similar, repeats no more here, it is necessary to illustrate , in order that the feedback channel 20 of the 1st row also has corresponding display address wire to connect, at this moment can additionally increase by two Show address wire.

If in one embodiment, the show address signals of upper and lower two row occur overlapping situation, and are separated by two rows Show address signals be it is nonoverlapping, the odd column of that the i-th row, the feedback channel 20 of even column switching transistor Q4 control Signal can uses show address signals SEL [i-2], SEL [i-4] respectively, as shown in Fig. 6 (d).

The display system with feedback channel of the application, display operation is done in frame, does not do feedback operation, therefore in frame During interior normal display, display system is not influenceed by the related circuit of feedback.The period of feedback channel 20 between frames, by picture The display signal line for the pixel cell 10 that the aging signal of plain unit 10 passes through adjacent column passes to row driver 130.

The above-mentioned transistor being related to, can use non-crystalline silicon, polysilicon, oxide semiconductor, organic semiconductor, NMOS/PMOS techniques or CMOS technology manufacture.

The operation principle of the display system with feedback channel of the application is illustrated below.

The course of work of display system with feedback channel is divided into the display operation in frame, and the sky between frame and frame Feedback operation in the white period.Fig. 7 is refer to, N=768, M=1024 might as well be made.Show address wire SEL [1]~SEL [768], it is respectively used to gate the pixel cell 10 of the 1st~768 row, display signal line DATA [1]~DATA [1024], uses respectively Simulative display signal is sent in the pixel cell 10 to the 1st~1024 row, or receives the aging signal of feedback.It is in order that last The aging signal of one row pixel cell 10, which can be also sent, to be come, and can also additionally increase a display signal line DATA [1025]. L1 is to represent the simulative display signal after the 1st row all pixels unit 10 is compensated in figure, i.e. signal L1 contains display signal Line DATA [1] arrives display signal line DATA [1024] simulative display signal, and L2 is to represent the 2nd row all pixels unit 10 to be mended Simulative display signal after repaying, the like, L768 is to represent the simulative display after the 768th row all pixels unit 10 is compensated Signal.It should be noted that the display operation in frame, the feedback operation of the blank interval between frame and frame are only depicted in Fig. 7 Not and draw.

Display operation in frame:In the present embodiment, pixel cell 10 is gated when showing that address wire is high level, and row is swept Driver 120 is retouched by showing address wire SEL [1]~SEL [768], since the 1st row, gates each pixel list successively in order Member 10, can be one section of frame and frame after row scanner driver 120 has gated last column i.e. pixel cell 10 of the 768th row Between blank interval, afterwards again start to sweep the 1st row pixel cell of lower frame.Row scanner driver 120 often gates one-row pixels Unit 10, row driver 130 will be transferred to the simulative display signal compensated accordingly on display signal line.Display letter Simulative display signal on number line can be at least maintained untill row scanner driver 120 ends and gates the row pixel cell 10.

Feedback operation between frame and frame:In display operating process in frame, feedback channel 20 is can not to pass signal It is delivered to display signal line, that is to say, that the presence of feedback channel 20, do not interfere with and normally show.Between frames Blank interval, it is necessary to when doing feedback operation, row scanner driver 120 first sends the pixel of show address signals gating target line Unit 10, row driver 130 export compensation by the display signal generator module 134 that odd number arranges to the pixel cell 10 that odd number arranges The simulative display signal crossed is used for driving pixel cell 10 to produce aging signal as analog correction signal, and now even column is aobvious Show the disabled status of signal generator module 134 (i.e. now the display signal generator module 134 of even column does not export simulative display Signal), with the time or afterwards, the feedback channel 20 of odd column is only gated, and the feedback channel 20 of even column is then in cut-off shape State.As described above, the gating signal of feedback channel 20, can be independently of show address signals or display address letter Number.Aging signal caused by the pixel cell 10 of odd column then can be relayed to even column by the feedback channel 20 of odd column The switching transistor Q1 of pixel cell 10 the second pole, then switched aging signal output to this by this switching transistor Q1 The display signal line of the extremely connected even column of the first of transistor Q1, is finally forwarded to the old of row driver 130 by aging signal Change signal monitoring module 135.Because display signal line is in succession display signal generator module 134 and aging signal monitoring mould simultaneously Block 135, therefore, during feedback operation, the display signal generator module 134 that is connected with odd column display signal line, aging Signal monitoring module 135 is in the state that enables, disabled status (activity i.e. without receiving aging signal), with even number respectively The connected display signal generator module 134 of row display signal line, aging signal monitoring module 135 are to be in disabled status respectively (activity i.e. without producing the simulative display signal through overcompensation), enable state.Finish this journey odd column pixel unit Feedback operation, begin to do the feedback operation of this journey biserial pixel cell.Way is the same, is only now shown with odd column The connected display signal generator module 134 of signal wire, aging signal monitoring module 135 are in disabled status respectively, enable shape State, the display signal generator module 134 being connected with even column display signal line, aging signal monitoring module 135 are in respectively Enable state, disabled status.It can be seen that the rightmost in this display system picture element matrix 110 has a row display signal line DATA [M+1] is to be dedicated for right column (i.e. last is arranged) pixel cell 10 to feed back aging signal use, i.e. the pixel list of right column Second end of the feedback channel 20 of member 10 is connected to rightmost that row display signal line DATA more additional than normal display system On [M+1].After the feedback operation of pixel cell 10 of odd column and even column has been handled, display system can be by impacted row Display data the inside of pixel cell 10 is write back to by extra display operation, for example, in Fig. 6 (a), carrying out i-th During the feedback operation of row pixel cell 10, now the gating signal of feedback channel 20 includes SEL [i], SEL [i+1] and SEL [i+ 2], therefore affected behavior i-th, the pixel cell 10 of i+1 and i+2 rows, therefore carried out in the pixel cell 10 of the i-th row After feedback operation, then operated by extra display and corresponding simulative display signal is respectively written into i-th, i+1 and i+2 rows In pixel cell 10

The display system of feedback channel in the application the various embodiments described above, because the first end of feedback channel 20 is connected to The drive circuit 11 or light emitting diode OLED of one pixel cell 10, for receiving the aging signal of this pixel cell 10;Feedback Second end of passage 20 is connected to the switching transistor Q1 of another pixel cell 10 the second pole, for being chosen when feedback channel 20 By aging signal output to the switching transistor Q1 of this another pixel cell 10 the second pole when logical, to pass through this switching transistor Aging signal is transferred to the display signal line being extremely connected with this switching transistor Q1 first by Q1, aobvious so as to which aging signal be passed through Show that signal wire is transferred to row driver 130, therefore the output end of feedback channel 20 is not to be directly coupled on display signal line, this Sample both realizes feedback aging signal, again without the load of increase display signal line.Simultaneously as feedback channel 20 is in frame and frame Between period, by the display signal line for the pixel cell 10 that the aging signal of pixel cell 10 passes through adjacent column pass to row drive Dynamic device 130, therefore the operation of the display in frame is not interfered with not only, and also improve the speed of feedback aging signal.

Above content is to combine the further description that specific embodiment is made to the application, it is impossible to assert this Shen Specific implementation please is confined to these explanations.For the application person of an ordinary skill in the technical field, do not taking off On the premise of conceiving from the present application, some simple deduction or replace can also be made.

Claims (11)

1. a kind of display system with feedback channel, including:
Pixel cell, the pixel cell include light emitting diode, the drive circuit for driving the light emitting diode and use In the switching transistor for gating the pixel cell;Wherein, the control pole of switching transistor is electrically connected to show address signals line, First pole is electrically connected to display signal line, and the second pole is electrically connected to the drive circuit;
Characterized in that, also include:
Feedback channel, there is first end, the second end and control terminal;The control terminal of the feedback channel receives gating signal, is used for Gate the feedback channel;The first end of the feedback channel is connected to the drive circuit or light emitting diode of a pixel cell, For receiving the aging signal of this pixel cell;Second end of the feedback channel is connected to the switch crystal of another pixel cell Second pole of pipe, for when the feedback channel is strobed that the switch of aging signal output to another pixel cell is brilliant The pole of body pipe second, shown with being transferred to the aging signal by this switching transistor with what this switching transistor first was extremely connected Show signal wire, so as to which aging signal be transferred out by display signal line;The aging signal includes to be driven in pixel cell Driving transistor, the original threshold voltages inequality information of light emitting diode in circuit, and driving transistor in drive circuit, The threshold voltage variation information of light emitting diode after usage.
2. there is the display system of feedback channel as claimed in claim 1, it is characterised in that also include:
Picture element matrix, the picture element matrix is including showing that address wire and M row are described aobvious described in the N rows M row pixel cell, N rows Show signal wire, pixel cell and respective display address wire, display signal line connect respectively, and N and M are positive integer;
Row scanner driver, for by show address wire to picture element matrix send show address signals, with a frame successively Gate each row pixel cell;
Row driver, for sending simulative display signal to picture element matrix by display signal line, the simulative display signal is used In providing the display data that includes image/video information for pixel cell;And for receiving pixel square by display signal line The aging signal of battle array feedback.
3. there is the display system of feedback channel as claimed in claim 1, it is characterised in that the feedback channel first end connects The pixel cell connect, the pixel cell being connected with this end of feedback channel second, it is located at same a line adjacent column of picture element matrix;Or Person, it is located at the adjacent lines adjacent column of picture element matrix.
4. the display system with feedback channel as described in claim 1 or 3, it is characterised in that:
The feedback channel includes a switching transistor, and the first pole, the second pole and the control pole of the switching transistor are respectively The first end of the feedback channel, the second end and control terminal.
5. there is the display system of feedback channel as claimed in claim 4, it is characterised in that:
With the feedback channel of a line odd column, its control terminal all receives a same strobe signal independently of show address signals; With the feedback channel of a line even column, its control terminal all receives another same strobe signal independently of show address signals;
Or
With the feedback channel of a line odd column, its control terminal all receives the show address signals of a non-one's own profession as gating signal; With the feedback channel of a line even column, its control terminal all receives the show address signals of another non-one's own profession as gating signal.
6. the display system with feedback channel as described in claim 1 or 3, it is characterised in that:
The feedback channel includes at least first switch transistor and second switch transistor, and the of the first switch transistor Two poles are extremely connected with the first of second switch transistor, the first pole of the first switch transistor, second switch transistor Second pole is respectively the first end of the feedback channel, the second end, and the control terminal of the feedback channel includes first switch crystal The control pole of pipe and the control pole of second switch transistor.
7. there is the display system of feedback channel as claimed in claim 6, it is characterised in that:
With the feedback channel of a line odd column, the control pole of its first transistor receives the show address signals of a non-one's own profession, its The control pole of second transistor receives the show address signals of one's own profession;With the feedback channel of a line even column, its first transistor Control pole receive the show address signals of another non-one's own profession, the control pole of its second transistor receives the display address letter of one's own profession Number.
8. there is the display system of feedback channel as claimed in claim 2, it is characterised in that the feedback channel is in frame and frame Between period, by the display signal line for the pixel cell that the aging signal of pixel cell passes through adjacent column pass to it is described row drive Dynamic device.
9. there is the display system of feedback channel as claimed in claim 8, it is characterised in that the row driver includes display Signal generator module/correction signal generation module, for the period between frames, by display signal line to picture element matrix Simulative display signal/analog correction signal through overcompensation is sent, to drive pixel cell to produce aging signal.
10. there is the display system of feedback channel as claimed in claim 8, it is characterised in that the row driver includes old Change signal monitoring module, for the aging signal of feedback to be received and analyzed by display signal line.
11. there is the display system of feedback channel as claimed in claim 1, it is characterised in that the pixel cell is electric current The pixel cell of programming type or voltage-programming type.
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