Organic light emission indicator device and control method therefor

Abstract

Organic light emission display device comprising: a display field (10) provided with pixels (P) connected to a sensing line (14B); and a sensing unit (24) configured to output a pixel (P) sensing voltage input through the sensing line (14B) as sensing data in a first sensing mode performed during a power-off period and a second sensing mode performed during a display drive period, wherein the display field (10) comprises: a first capacitor (Cap_1) connected to the sensing line (14B) configured to store a sensing voltage of the first sensing mode and supply the sensing voltage to the sensing unit (24);and a second capacitor (Cap_2) which is connected to the sensing line (14B) and is configured to store a sensing voltage of the second sensing mode and supply the sensing voltage to the sensing unit (24).

Description

Background

[0001] This revelation refers to an organic light emission display device and a control procedure for this. Description of the state of the art

[0002] An organic light emission display device Orders sub -pixels, of which each includes an organic light -emitting diode (referred to as a "light diode")) in the form of a matrix and controls the luminance of the sub -pixels according to a gray level of the image data to display images. The sub-pixels include a light-emitting diode and a long-term thinning transistor (control), which controls a control stream that is entered in the light emotion.

[0003] The control TFT has a deterioration characteristics in which a threshold voltage is changed by the expiry of a control period. When the threshold voltage is changed, a problem occurs insofar as the image quality is deteriorated due to a deviation of the electricity that flows in the organic light -emitting diode (OLED), even if the same data voltage is created to you. In order to solve this problem, various compensation procedures are known, which carry out real-time recording in the middle of recording a characteristics of the control TFT or control of the control when a display device is switched on / off.

[0004] However, real -time recording is carried out for a visiting period in order to minimize an impact on an image that is displayed. Therefore, there is a problem in that there is a limitation of data that can be obtained during real time recording. Brief summary

[0005] The present revelation was carried out in view of the problems above and it is a task of the present revelation to create an organic light emission display device and a control procedure that can compensate for a threshold voltage of a control tft by capturing the threshold tension of the control ttft during a real time recording.

[0006] In addition to the tasks of the present revelation, as mentioned above, additional tasks and features of the present revelation for the specialist in the field from the following description of the present revelation are clearly understandable.

[0007] These tasks are solved by the subject of the independent claims. Other advantageous embodiment and refinements are described in the respective dependent claims.

[0008] In connection with the present invention, an "display control", an "display control period" or an "display control mode" relate to a period or a mode, after a switch -on signal is generated according to a user input and an image for the user is displayed by the organic light emission display device according to the execution form of this revelation. Furthermore, there is a "switching off", an "switch -off period", a "switch -off sequence period" or an "switch -off mode" to a period or a mode after a switch -off signal is generated according to a user input, for example to switch off and / or the image display. As a result, the "switching off" can be a period after the end of the display control period. In this way, the recording, which is carried out during the display control period, is called "real time recording", and the recording that is carried out during the switch-off period can be referred to as "expression".

[0009] According to one aspect of the present revelation, an organic light emission display device is created, which is provided with a display area that is provided with pixels that are connected to a detection line; And a recording unit that a detection voltage of the pixel, which is entered by the registration line, outputs as an registration data in a first detection data in the first detection data that is carried out during the switch -off and a second detection mode that is carried out in the middle of the control of an display mode, whereby the scoreboard is connected to the first capacitor to include an registration tension by the first Save the detection mode and add the detection voltage for the detection line, and a second capacitor that is connected to the registration line in order to save a detection voltage of the second detection mode and to supply the detection voltage for the registration unit.

[0010] The second capacity can have a capacity that is smaller than that of the first capacitor.

[0011] Die organische Lichtemissionsanzeigevorrichtung kann ferner einen ersten Schalter, der den ersten Kondensator mit der Erfassungsleitung gemäß einem Auswahlsignal des ersten Erfassungsmodus verbindet, und einen zweiten Schalter, der den zweiten Kondensator mit der Erfassungsleitung gemäß einem Auswahlsignal des zweiten Erfassungsmodus verbindet, umfassen.

[0012] The detection unit can include a fourth switch that connects the detection line with a first reference voltage source, a third switch that connects the registration line with a second reference voltage source, and a fifth switch that connects the detection line with an analog digital converter to feel the detection voltage.

[0013] The organic light emission display device can also include a voltage supply unit, which provides data for the first detection mode for the pixel in the first detection mode and for the second detection mode for a visiting period between active periods on the basis of a vertical synchronization signal in the second detection mode.

[0014] The voltage supply unit can supply image data for the image display for the active period.

[0015] The pixel can include a control tft and an OLED from which an amount for the light emission is controlled in accordance with the control, and the detection voltage can be a threshold voltage of the control.

[0016] The organic light emission display device can also include a time circuit control unit that outputs the selection signal of the first detection mode during the switch -off, output the selection signal of the second detection mode in the middle of the control of the display mode in order to receive the registration data from the registration unit, and image data that is displayed in the middle of the control of the notification mode, on the basis compensates for the detection data.

[0017] The time -covering tax unit can output the selection signal of the second detection mode for the touch period between the active periods based on the vertical synchronization signal.

[0018] According to another aspect of the present revelation, a control procedure of an organic light emission display device is created, which is connected to the receipt of the detection data of a pixel, which is connected to a detection line by a first capacitor, which is controlled in a first detection mode during switching on and connected to the registration line, the supply of image data to the image display for an active period on the basis of a vertical synchronization signal in the middle of the control of a display mode and the receipt of the detection data of the pixel, which is connected to the registration line by a second capacitor, which is controlled in a second detection mode for the exit period between the active period and is connected to the detection line.

[0019] The second capacity can have a capacity that is smaller than that of the first capacitor.

[0020] The pixel can include a control tft and an OLED from which an amount for the light emission is controlled in accordance with the control, and the detection voltage can be a threshold voltage of the control.

[0021] The control procedure can also include compensating for the image data based on the registration data.

[0022] In the organic light emission display device and in the control procedure according to the present revelation, a capacitor with a small scale that is applicable to the detection line during the real-time recording can be additionally intended, which means that the threshold voltage of the control ttft can be recorded between the frame itself. As a result, the threshold tension of the control dft can be recorded and compensated for in real time.

[0023] In the organic light emission display device and in the control procedure according to the present revelation, a state of control for a long time will also be maintained for a long time without switching off and the threshold tension of the control ttft can be recorded in order to compensate for the changed threshold voltage in relation to an organic light emission display device, in which the same frame is repeatedly scanned, for example, a display device that is used for an electrical Character table or a stop table is used.

[0024] In addition to the effects of this revelation, as mentioned above, additional tasks and features of the present revelation for the specialist in the field from the following description of the present revelation are clearly understandable. Figure list

[0025] The above and other tasks, characteristics and other advantages of the present revelation are more clearly understandable from the following detailed description in connection with the accompanying drawings; show: Fig. 1 a schematic block view that represents a display device with a current recording function in accordance with the execution of the present revelation; Fig. 2 an exemplary view that represents a pixel circuit that is in a display field of Fig. 1 is trained; Fig. 3 a schematic view that represents an external compensation circuit using a timing tax unit and a data tax unit in accordance with the execution of the present revelation; Fig. 4 a view that represents an registration procedure of an organic light emission display device according to the execution of the present revelation; Fig. 5 A view that represents a detection period of a pixel circuit in a framework of an organic light emission display device according to the execution of the present revelation; Fig. 6 an exemplary view that represents a pixel circuit and a detection structure of an organic light emission display device according to the execution of the present revelation; Fig. 7 a controlling time view that represents an integration surgery of an organic light emission display device according to the execution of the present revelation; and Fig. 8a to Fig. 10b views, the voltage wave shapes of a node N1 and a detection mode surgery of an organic light emission display device according to the execution of the present revelation. Detailed description of the revelation

[0026] Advantages and characteristics of the present revelation and implementation procedures of which are illustrated by the following embodiment described with reference to the accompanying drawings. However, the present revelation can be embodied in different forms and should not be understood as limited to the embodiment set out here. Rather, these embodiment are intended in such a way that this revelation is thorough and complete and that the protection area of ​​the present revelation is completely conveyed to the specialist in the field. Furthermore, the present revelation is only defined by the protection areas of the claims.

[0027] A shape, a size, a ratio, an angle and a number that are revealed in the drawings to describe embodiments in this revelation are only an example and consequently the present revelation is not limited to the details shown. The same reference sign relates to the same elements in the entire patent description. If the following description stipulates that the detailed description of the relevant known function or configuration makes the important point of the present revelation unnecessarily unclear, the detailed description is dispensed with. In a case in which "comprise", "have" and "include", which are described in this patent description, another part can be added if not "only used ~". The terms of a singular form can include plural forms, if not given.

[0028] When using an element, the element is comprehensively understood as an error range, although there is no explicit description.

[0029] When describing a position relationship, if, for example, the position relationship is described as "on", "over", "under-" and "side", one or more sections between two other sections can be arranged, unless "only" or "directly".

[0030] It goes without saying that although the terms "first", "second" etc. can be used here to describe different elements, these elements should not be limited by these terms. These terms are only used to separate one element from another. A first element could be called the second element, for example, and a second element could also be mentioned the first element without deviating from the protection area of ​​the present invention.

[0031] The same reference marks are used in the whole drawings to refer to the same or similar parts.

[0032] The embodiment of the present revelation is described below with reference to the accompanying drawings. If the following revelation stipulates that the detailed description of elements or functions that are known in relation to the present revelation makes the object of the present revelation unnecessarily unclear, the detailed description is dispensed with.

[0033] Fig. 1 is a schematic block view that represents a display device with a current recording function in accordance with the execution of the present revelation.

[0034] With reference to Fig. 1 includes the display device an display field 10 , which is provided with several pixels, a scan driver 13 , a data driver 12 and a time -covering tax unit 11 . The display device can work in an display mode for the image display and a detection mode for the recording of an electrical characteristics.

[0035] Several data lines 14A , several registration lines 14B and several scan lines 15 Are in the display field 10 arranged. Pixel PXL are arranged in areas in which the several data lines 14A , the several registration lines 14B and the several scan lines 15 cross each other. Each pixel PXL includes a luminous emission (referred to as OLED below) and a long-term thin shift transistor (below referred to as the control tft) for the control of the OLED. A deterioration occurs in elements of the OLED and the supervisory ttft when the long-term passage goes away. The electrical characteristics of each element can be recorded during the detection mode surgery to compensate for the deterioration.

[0036] The scan driver 13 Is a scan signal in response to a gate time time expansion control signal GDC 11 is supplied. The scan driver 13 gives a scan signal that includes a high scan voltage and a low scan voltage through the scan lines 15 out of.

[0037] The data driver 12If a data signal DATA converts into a data voltage from the analog type according to a data time expansion control signal DDC during the display mode surgery and leads the data voltage from the analog type to the display field 10 to. The data driver 12 Captures the characteristics of an element contained in at least one of the Pixel PXL and leads the recorded detection data SD to the time -covering tax unit 11 During the detection mode surgery.

[0038] The time -covering tax unit 11 can work in an display mode for the image display and a detection mode for the recording of electrical characteristics of the Pixel PXL.

[0039] In the display mode, the timing tax unit is 11 With a control signal that includes a data release signal DE or a vertical synchronization signal, a horizontal synchronization signal and a clock signal, and a data signal data for image display supplies from a image processor. The time -covering tax unit 11 Creates a gate time expansion control signal GDC to control an operating time point of the scan driver 13 and a data time transfer tax signal DDC to control an operating time of the data driver 12 based on the control signal. The time -covering tax unit 11 Transfer the data time transfer tax signal DDC and the data signal Data to the data driver 12 and transmits the GATE time expansion control signal GDC to the scan driver 13 .

[0040] In the detection mode, the timeline control unit transmits 11 A recording mode signal to the scan driver 13 and the data driver 12 And receives the characteristics of an element contained in at least one pixel of the PXL pixel, as a detection data SD. The time -covering tax unit 11 Can the data signal Data, which is to be written in a Pixel P, based on the detection data SD, that of the data driver 12 be returned, correct.

[0041] Fig. 2 is an exemplary view that represents a pixel circuit that is in a display field of Fig. 1 is trained.

[0042] With reference to Fig. 2 A fortune switch in a pixel can be an OLED, a control ttft DT, a first switching TFT ST1 for switching, a second switching TFT ST2 for capture and a capacitor (memory capacitor CST).

[0043] The OLED has an anode electrode and a cathodel electrode. In the OLED, the anode electrode is connected to a base voltage EVSS and the cathode electrode is connected to a source node or a drain node of the control TFT DT. Therefore, the OLED light emissions can be controlled in accordance with a size of a control current that is entered in the cathodel electrode.

[0044] The control TFT DT leads to an OLED to the OLED according to a potential difference between a gate electrode and a source electrode. The control TFT DT has a gate electrode, a first electrode and a second electrode. The first electrode can be a drain electrode and the second electrode can be a source electrode. The first electrode is connected to EVDD and the second electrode is with the first knot N1 connected, which is connected to the anode electrode of the OLED. The gate electrode is with a second knot N2 connected, which is connected to the first switching TFT ST1.

[0045] The first switching TFT ST1 transmits the data voltage VDDA to the gate node of the control tft DT. The first switching TFT ST1 is switched on / switched off by a scan signal scan, which is placed on the gate electrode to a knot N2 and a data line 14A to connect electrically or separate from each other.

[0046] The memory capacitor CST is between the knot N1 and the knot N2 of the control ttft dt. The memory capacitor CST maintains a voltage between the gate and the source of the control TFT DT for a framework time.

[0047] A scan line 15B is connected to a gate electrode of the second switching TFT ST2 and the first electrode is with the first knot N1Connected and the second electrode is with a detection line 14B tied together. The second switching TFT ST2 connects the first knot N1 With the registration line 14B According to a Sense detection signal, which is entered in the gate electrode. The second switching TFT ST2 can be switched on by the Sense Sense detection signal to a reference voltage VREF, which for the registration line 14B is fed to the knot N1 to be added and the tension of the node can N1 To the data driver 12 Through the registration management 14B transmitted.

[0048] In addition to the pixel structure of 3T1C mentioned above, various pixel structures such as B. 4T1C, 5T1C and 7T1C are applied to the present revelation and the present revelation is not limited to the embodiment mentioned above.

[0049] Fig. 3 is a schematic view that represents an external compensation circuit using a timing tax unit and a data tax unit in accordance with the execution of the present revelation. A circuit for the recording of an element contained in a pixel can be as a separate detection circuit, not as a data driver 12 be embodied. However, a description is given on the basis of the fact that the detection circuit in the data driver 12 is included.

[0050] With reference to Fig. 3 includes the timing tax unit 11 a compensation memory 28 For saving detection data SD for data compensation and a compensator 26 To compensate for a data signal Data that is to be written in the Pixel P, based on the registration data SD.

[0051] In the detection mode, the time circuit control unit can 11 Control an entire surgery for the detection mode control according to a predefined detection process.

[0052] The compensator 26 corrects the data signal data, which is to be written in the Pixel P, based on the detection data SD, which in the compensation memory 28 are saved, and then gives the corrected data signal to the data driver 12 out of.

[0053] The data driver 12 comprises a voltage supply unit 20 that outputs the data voltage to be written in the Pixel P and a detection unit 24 that captures the characteristics of the element contained in the Pixel P.

[0054] The voltage supply unit 20 can output an ad voltage and a detection data voltage through a data channel, which with the data line 14A is connected. The voltage supply unit 20 can have several data channels. The voltage supply unit 20 comprises a digital-analog converter DAC that converts a digital signal into an analog signal and generates a display tension or a detection data voltage.

[0055] The voltage supply unit 20 Creates the display voltage in response to the data time expansion tax signal DDC, which is 11 is supplied during the display mode. The voltage supply unit 20 leads the display tension to the data line 14A to. The display tension that is for data line 14A is synchronized with a switch-on time of the display scan signal scan and then placed on the pixel P during the display mode.

[0056] The voltage supply unit 20 creates a given detection data voltage and leads the data voltage generated to the data line 14A during a detection mode. The data line 14A Added recording data voltage is synchronized with a switch-on time of the detection scan signal SEN and created to the Pixel P during the registration mode. The tension (the tension between the knots N1 and N2 ) Between the gate and the source of the control TFT DT, which is contained in the Pixel P, programmed by the detection data voltage.

[0057] The registration unit 24captures the characteristics of the element contained in the Pixel P by the detection line 14B that with the registration line 14B is connected. The registration unit 24 Can the tension of the first knot N1 of the control TFT DT, which is contained in the Pixel P. The registration unit 24 controls the detection mode under the control of the time expansion control unit 11 to. The registration unit 24 Records and touches the signal from the Pixel P, convert the frowned out result by an analog digital converter (referred to as ADC below) and adds the converted data to the timing tax unit 11 out of.

[0058] The time -covering tax unit 11 can control an entire surgery for the detection mode control according to a predefined detection process. The detection mode control can be carried out during a vertical spread period during the display control, an input sequence period before the display control starts, or a switch -off period after the display control ends. A detection mode method is described below in detail according to the execution of the present revelation.

[0059] Fig. 4 is a view that represents a detection procedure of an organic light emission display device in accordance with the execution of the present revelation and Fig. 5 is a view that represents a detection period of a pixel current in a framework of an organic light emission display device according to the execution of the present revelation. The organic light emission display device according to the execution of the present revelation can be recorded in a first detection mode during the switch -off and the recording in a second detection mode during the display control can carry out.

[0060] With reference to Fig. 4 Can the organic light emission display device according to the embodiment of the present revelation a threshold voltage VTH of the control ttft dt in a pixel that in the display field 10 After a switch-off signal is generated according to a user input, it is trained, etc. In this way, the recording, which is carried out, after the switch-off signal is created, is referred to as "expression". As a result, the detection mode control can be carried out during a switch -off period after the display control ends.

[0061] The organic light emission display device according to the embodiment of the present revelation can also record the threshold voltage of the control ttft DT in the pixel during the control of the display mode for displaying an image after a switch-on signal is generated according to an user input, etc. In this way, the recording that is carried out during the display mode ". The real -time recording can be carried out between active period (active time) on the basis of a vertical synchronization signal VSYNC per excavation period (excerpt period). In the case of real -time recording, the recording per excavation period between active periods on the basis of a vertical synchronization signal VSYNC can be carried out.

[0062] With reference to Fig. 5 can be recorded the threshold voltage of the control TFT DT for a vertical exhibition period BP of a framework. A frame includes a vertical active period AP and a vertical exhibition period BP. The vertical active period AP can be defined as a period, in which data data is written in pixels for the image display, and the vertical brush period BP can be defined as a period in which the letter of data is stopped.

[0063] In this way, the organic light emission display device can capture the threshold voltage VTH of the control ttft DT in the formation mode and in real-time recording mode in accordance with the execution of the present revelation.

[0064] Since a voltage saturation time of the first knot N1The control of the threshold tension VTH of the control ttft DT is required, the recording of the threshold voltage VTH of the control-TFT DT requires a relatively longer time than time when a characteristics of mobility is recorded. Therefore, the threshold voltage VTH of the control-TFT DT could be recorded even in the event of a recording in the state of the art, whereas the threshold tension VTH of the control-TFT DT can itself be recorded in the real-time recording mode in the present revelation. In order to enable the threshold voltage of the control ttft dt to be recorded in a real creation mode, a recording structure of Fig. 6 in the display field 10 trained.

[0065] Fig. 6 is an exemplary view that represents a pixel circuit and a detection structure of an organic light emission display device according to the execution of the present revelation.

[0066] With reference to Fig. 6 The pixel connection includes an OLED, a control ttft DT, a memory capacitor CST, a first switching TFT ST1 and a second switch TFT ST2. A data line 14A , which is connected to the first switching TFT ST1, is with the voltage supply unit 20 of the data driver 12 (( Fig. 3) connected. A registration line 14B , which is connected to the second switching TFT ST2, is with the detection unit 24 of the data driver 12 (( Fig. 3) connected. Since a connecting relationship and an operating process of the pixel circuit Fig. 3 are, your detailed description is dispensed with.

[0067] With reference to Fig. 6 is the data line 14A With the digital analog converter DAC of the voltage supply unit 20 Connected and lists the display tension or the detection data voltage. The voltage supply unit 20 Creates the display tension during a display mode. In the display mode, the first switching TFT ST1 is switched on by a scan signal scan to the display tension, which for the data line 14A is added to the second knot N2 to create. The voltage supply unit 20 Creates a predetermined detection data voltage during an output mode and a real-time recording mode to use the data voltage generated 14A to be added. In the detection mode, the detection data voltage, the data line is 14A is added to the second knot N2 created by the first switching TFT ST1. Therefore, a voltage (a tension between the nodes N1 and N2 ) Programmed between a gate and a source of the control TFT DT, which is included in the Pixel P.

[0068] The registration line 14B Is with the recording unit 24 connected to the detection voltage, which is recorded by the pixel, to the detection unit 24 to transfer. A first switching TFT SW1, which according to a selection signal Mode_1 of the first detection mode of the time-expedant control unit 11 is switched on to a first capacitor CAP_1 with the registration line 14B To connect, and a second switching TFT SW2, which is switched on according to a selection signal Mode_2 of the second detection mode, to a second capacitor CAP_2 with the registration line 14B to connect. In an example of the following description, a first detection mode is an expression mode and a second detection mode is a real-time recording mode.

[0069] The first capacitor CAP_1 is with the registration management 14B connected to the tension of the first knot N1 to save. The second capacitor CAP_2 is with the registration line 14B connected in real -time recording mode to the tension of the first knot N1 to save. The real -time recording mode is carried out during a visiting period between the active period on the basis of the vertical synchronization signal.

[0070] In the operation of the frame frequency of 120 Hz, for example, a vertical exhibition period (time of 90 lines), which is used for the recording and compensation, 0.04 s. In general, the time that is necessary is to capture 1 line in the form of the recording, 29239 µs in the case of red (R), 37236 µs in the case of white (w), 30236 µS In the case of green (g) and 36238 µs in the case of blue (B). If the first capacitor CAP_1 is used on the basis of white (W) that requires most of the time to record 1 line, 0.37236 S is required. If, on the other hand, the second capacitor CAP_2 with a capacity of 1 / 12 times is used by that of the first capacitor, 0.03083 S (about 0.37236 S / 12) is required. In real -time recording mode, the time required to insert a black frame is 0.00833 (1 / 120 S). Therefore, the entire time required is 0.03083 S + 0.00833 S = 0.03916 S, and this is shorter than 0.04 s, which is a time for 90 lines of the vertical exhibition. The capacity of a capacitor is as L = E Q D defined. If the specific resistance of the capacitor is a distance of 'd', the smaller the capacity applies, the smaller a load Q, which is stored in a recording capacitor. Since the charge Q of the capacitor that is used for the recording is smaller, the saturation time that is charged for a tension is therefore shorter. If the second capacitor CAP_2 with a capacitor of 1 / 12 times is used from that of the first capacitor CAP_1 that is used in the exposure mode, the recording can be carried out for a short time, which means that the voltage of the source node can be carried out N1 of the control-TFT DT even in the case of real-time recording mode.

[0071] The registration unit 24 comprises an analog digital converter ADC, which with the registration line 14B is connected, a fourth switch SW4 that the electrical connection between a first reference voltage source VREF1 and the registration line 14B controls, a third switch SW3 that the electrical connection between a second reference voltage source VREF2 and the registration line 14B controls, and a fifth switch SW5 that the electrical connection between the analog digital converter ADC and the registration line 14B controls.

[0072] The fourth switch SW4 can be the first reference voltage source VREFL with the registration line 14B Connect according to a first initialization signal RPRE. The third switch SW3 can be the second reference voltage source VREF2 with the registration line 14B Connect according to a second initialization signal Spre. In this case, the second reference voltage source VREF2 can have a voltage value that is lower than the first reference voltage source VREFL. The fifth switch SW5 can be the detection line 14B Connect to the analog digital converter ADC according to a sam sam.

[0073] The analog-digital converter ADC is changing a scoring result of detection data, which is 14B to be transferred, converted into a digital type and gives the converted result to the time -exposed to the time expansion control unit 11 out of.

[0074] Fig. 7 is a controlling time view that represents a detection surgery of an organic light emission display device according to the execution of the present revelation.

[0075] With reference to Fig. 7 can the detection control of the organic light emission display device according to the execution of the present revelation by an initialization step S10 , a detection step S20 and a discount progress S30 be performed.

[0076] In the initialization step S10 If the first switching TFT ST1 is switched on according to a scan signal scan with a one level and the second switch-ttft ST2 is switched off according to a Sense Sense detection signal. The second reference voltage source VREF2 is with the registration management 14B connected according to the second initialization signal Spre, so that a potential of the registration line 14Bis initialized to the second reference voltage VREF2.

[0077] In the recording step S20 If the first switching TFT ST1 is switched on according to a scan signal scan with a single level and the second switch-ttft ST2 is switched on according to a detection signal scythe with a single level. The detection data voltage is on the gate nodes N1 of the control ttft dt and consequently a pixel current flows between the drain and the source, which means that a potential of the source node N2 of the control TFT DT is increased by the pixel current. The registration line 14B that with the source node N1 of the control TFT DT is floating for the detection period. Therefore, the potential of the registration management becomes 14B In the same way as the source node N1 increased and the potential of the second capacitor CAP_2, which with the registration line 14B is also increased.

[0078] In the step S30 the second switching TFT ST2 is switched off according to a detection signal scythe with an outlet level. The fifth switch SW5 connects the registration line 14B With the analog digital converter ADC according to a sam. Therefore, the potential of the second capacitor CAP_2, which with the registration line 14B is connected, that is, the potential of the source node N1 , scanned and consequently output as an enclosure data by the analog digital converter ADC.

[0079] Fig. 8a to Fig. 10b are views, the tension wave shapes of a node N1 and represent a real -time recording mode surgery of an organic light emission display device according to the execution of the present revelation. Fig. 8a and Fig. 8b provide an initialization step S10 dar, Fig. 9a and Fig. 9b set a detection step S20 dar and Fig. 10a and Fig. 10b set a setting step S30 in real time recording mode, the second switch SW2 is based on a selection signal Mode_2 of the second detection mode of the timing tax unit 11 switched on, whereby the second capacitor CAP_2 with the registration line 14B is connected.

[0080] With reference to Fig. 8a and Fig. 8b is in the initialization step S10 The first switching TFT ST1 is switched on according to a scan signal scan with a one level and the second switching TFT ST2 is switched off in accordance with a Sense Sense Certification signal. The second reference voltage source VREF2 is with the registration management 14B connected according to the second initialization signal Spre, so that the potential of the registration line 14B is initialized to the second reference voltage VREF2. Therefore, the potential of the second capacitor CAP_2, which with the registration line 14B Connected, also initialized to the second reference voltage source VREF2.

[0081] With reference to Fig. 9a and Fig. 9b is in the registration step S20 The first switching TFT ST1 is switched on according to a scan signal scan with a one level and the second switching TFT ST2 is switched on according to a detection signal scythe with a single level.

[0082] The detection data voltage is on the gate nodes N1 of the control ttft dt and consequently a pixel current flows between the drain and the source, which means that a potential of the source node N2 of the control TFT DT is increased by the pixel current. That means a source sequence surgery to follow the tension of the gate node (knot N1 ) By tensioning the source node N2 The control TFT DT is carried out and the voltage of the source node is carried out N2 The control TFT DT is saturated and then the tension of the source node becomes N2 of the control TFT DT as a detection voltage VESSEN. The detection voltage VSense can be the voltage on the capacitor and can be recorded on the capacitor. At this time, a change in the threshold voltage of the control ttft DT on the basis of the recorded detection voltage VSSENE can be identified. The registration line 14B that with the source node N1of the control TFT DT is floating for the detection period. Therefore, the potential of the registration management becomes 14B In the same way as the source node N1 increased and the potential of the second capacitor CAP_2, which with the registration line 14B is also increased.

[0083] With reference to Fig. 10a and Fig. 10b is in the stepping step S30 The second switching TFT ST2 is switched off according to a detection signal Sense Sense. The fifth switch SW5 connects the registration line 14B With the analog digital converter ADC according to a sam. Therefore, the potential of the second capacitor CAP_2, which with the registration line 14B is connected, that is, the potential of the source node N1 of the control TFT DT, scanned and consequently issued as an entry data by the analog digital converter ADC. On the basis of the detection data, the changed threshold voltage of the control dtft can be determined.

[0084] As described above, a capacitor with a small scale, which can be applied to the detection line during the real-time recording, can be additionally intended in the organic light emission display device and in the control procedure, which can be used to record the threshold tension of the control period itself between the frame. As a result, the threshold tension of the control dft can be recorded and compensated for in real time. In the organic light emission display device and in the control process according to the present revelation, a state of control for a long time without switching off and the threshold tension of the control ttft can be recorded in order to compensate for the changed threshold voltage in relation to the organic light emission display device, in which the same frame is repeatedly scanned, for example, a display device that is used for an electrical Character table or a stop table is used.

[0085] It can be seen for the specialist in the field that the present revelation described above is not limited by the consequences described above and the accompanying drawings and that various substitutions, modifications and variations can be carried out in the present revelation without deviating from the protection area of ​​the revelations. As a result, the area of ​​protection of the present revelation is defined by the accompanying claims and it is intended that all variations or modifications that are derived from the importance, the protection area and the equivalent concept of claims fall into the protection area of ​​this revelation.

[0086] These and other changes can be carried out on the embodiment in view of the description presented in detail. In general, the terms used should not be understood in the following requirements that they limit the claims to the special embodiments revealed in the patent description and the claims, but should be understood in such a way that they include all possible embodiment together with the full protection area of ​​equivalents, to which such claims are justified. As a result, the claims are not limited by the revelation.

Claims

[1] Organic light emission indicator device comprising: a display field (10) equipped with pixels (P) connected to a detection line (14B); and a sensing unit (24) configured to output a pixel sensing voltage (P) input through the sensing line (14B) as sensing data in a first sensing mode, which is performed during a power-off period, and a second sensing mode, which is performed during a display drive period, the display field (10) comprises the following: a first capacitor (Cap_1) which is connected to the sensing line (14B) and is configured to store a sensing voltage of the first sensing mode and supply the sensing voltage to the sensing unit (24); and a second capacitor (Cap_2) which is connected to the sensing line (14B) and is configured to store a sensing voltage of the second sensing mode and supply the sensing voltage to the sensing unit (24). [2] Organic light emission indicator device according to claim 1, wherein the second capacitor (Cap_2) has a capacitance that is smaller than that of the first capacitor (Cap_1). [3] Organic light emission indicator device according to any of the preceding claims, further comprising: a first switch (SW1) configured to connect the first capacitor (Cap_1) to the sensing line (14B) according to a selection signal of the first sensing mode; and a second switch (SW2) configured to connect the second capacitor (Cap_2) to the sensing line (14B) according to a selection signal of the second sensing mode. [4] Organic light emission indicator device according to any of the preceding claims, wherein the detection unit (24) comprises: a fourth switch (SW4) configured to connect the detection line (14B) to a first reference voltage source (Vrefl); a third switch (SW3) configured to connect the sensing line (14B) to a second reference voltage source (Vref2); and a fifth switch (SW5) configured to connect the sensing line (14B) to an analog-to-digital converter (ADC) configured to sample the sensing voltage. [5] Organic light emission indicator device according to one of the preceding claims, further comprising a power supply unit (20) configured to supply data for the first acquisition mode to the pixel (P) in the first acquisition mode, and configured to supply data for the second acquisition mode during a blanking period between active periods based on a vertical synchronization signal in the second acquisition mode. [6] Organic light emission display device according to claim 5, wherein the power supply unit (24) is configured to supply image data for image display during the active period. [7] Organic light emission display device according to any of the preceding claims, wherein the pixel (P) comprises an organic light-emitting diode (OLED) and a driver TFT configured to drive the organic light-emitting diode (OLED), and wherein the detection voltage is a threshold voltage of the driver TFT. [8] Organic light emission display device of an organic light-emitting diode, further comprising a timing control unit (11) configured to output a selection signal of the first acquisition mode during the off period, configured to output a selection signal of the second acquisition mode during a display drive period to receive the acquisition data from the acquisition unit (24), and configured to correct image data to be displayed based on the acquisition data during the display drive period. [9] Organic light emission indicator device according to claim 8, wherein the timing control unit (11) is configured to output the selection signal of the second detection mode for the blanking period between the active periods based on the vertical synchronization signal. [10] Control method of an organic light emission indicator device, wherein the control method comprises: Receiving acquisition data from a pixel (P) connected to an acquisition line (14B) via a first capacitor, which is driven in a first acquisition mode during a switch-off period and is connected to the acquisition line (14B); Supplying image data for image display to the pixel (P) for an active period based on a vertical synchronization signal during the display drive period; and Receiving the acquisition data of the pixel (P), which is connected to the acquisition line (14B) by a second capacitor (Cap_2), which is driven in a second acquisition mode during a blanking period between active periods and is connected to the acquisition line (14B). [11] Control method according to claim 10, wherein the second capacitor (Cap_2) has a capacitance that is smaller than that of the first capacitor (Cap_1). [12] Control method according to claim 10 or 11, wherein the pixel (P) comprises an organic light-emitting diode (OLED) and a driver TFT configured to control the organic light-emitting diode (OLED). [13] Control method according to one of claims 10 to 12, which further comprises correcting the image data on the basis of the acquisition data.

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