KR20190016728A - Organic light emitting display device - Google Patents

Abstract

The present invention relates to an organic light emitting display device wherein a plurality of display panels are arranged and, when one screen is formed, disturbance compensation and afterimage compensation are performed between the display panels adjacent to each other, and, consequently, brightness difference is prevented from being recognized. According to the present invention, the organic light emitting display device comprises: first and second display areas adjacent to each other; a first data driving unit which supplies data voltages to the first display area and comprises source driver ICs of a first group sensing a plurality of pixels arranged in the first display area; and a second data driving unit which supplies data voltages to the second display area and comprises source driver ICs of a second group sensing a plurality of pixels arranged in the second display area. According to the present invention, the organic light emitting display device comprises: a first timing controller which supplies first image data to the first data driving unit and receives L sensing data from the first data driving unit; and a second timing controller which supplies second image data to the second data driving unit and receives R sensing data from the second data driving unit. The first timing controller of the present invention receives supply of a part of the R sensing data and the second timing controller receives supply of a part of the L sensing data.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light-

The present invention relates to an organic light emitting display.

Description of the Related Art [0002] A display device technology for displaying visual information as an image or an image in an information society has been developed. Among display devices, an organic light emitting display uses an organic light emitting diode that generates light by recombination of electrons and holes to display an image. The organic light emitting display device has a fast response speed and is capable of expressing low gradation according to the self light emission, and thus, it is attracting attention as a next generation display.

The organic light emitting display according to the present application includes a display panel, a gate driver, a data driver, and a timing controller. The display panel includes a plurality of pixels formed at intersections of the data lines, the gate lines, the data lines and the gate lines, and supplied with the data voltages of the data lines when the gate signals are supplied to the gate lines. The pixels emit light at a predetermined brightness according to the data voltages.

The gate driver supplies gate signals to the gate lines. The data driver includes a source driver integrated circuit (IC) that supplies data voltages to the data lines. The data driver senses a voltage between the driving transistor and the organic light emitting diode in each pixel or a current flowing in the organic light emitting diode through the sensing lines. The organic light emitting display performs external compensation for compensating the threshold voltage of the driving transistor and residual compensation for compensating for deterioration of the organic light emitting diode using the sensed information.

The timing controller controls the operation timing of the gate driver and the data driver. Also, the timing controller receives sensing data generated by using the voltage or current value of the organic light emitting diode sensed by the data driver.

In recent years, high-resolution display devices such as UHD (ultra-high definition, 38310 x 21500) have been introduced. In addition, as the demand for a high-resolution display device of a consumer increases, a display device with a resolution of 5K3K (32120 x 2880) is being developed. Since the horizontal resolution of the 5K3K resolution display device is higher than the horizontal resolution of the UHD display device, the number of source driver ICs of the 5K3K resolution display device is larger than that of the UHD display device. Therefore, it is necessary to develop a new timing controller for application to a display device of 5K3K resolution. However, the development of a new timing controller is costly and time consuming. Accordingly, in recent years, the operation timings of the gate driver and the data driver are controlled using a plurality of timing controllers. In this case, the same number of display panels as the number of timing controllers is arranged.

The organic light emitting display device performs external compensation and residual compensation by referring to sensing data of adjacent pixels, and performs edge processing when there is no sensing data of adjacent pixels. The conventional OLED display does not receive the sensing data of the adjacent pixels at the edges of the respective display panels. Accordingly, even though the display area is a display area in which one screen is realized, all of the neighboring display areas are subjected to edge processing. When the adjacent display panels are edge-processed, there arises a problem that the luminance difference is visually recognized between neighboring display panels.

The present invention provides an organic light emitting display device that prevents a difference in luminance from being visually observed by performing external compensation and residual image compensation between neighboring display areas when a plurality of timing controllers are disposed to operate one panel .

The organic light emitting display according to the present invention includes a first group of source driver ICs for supplying data voltages to neighboring first and second display regions and a first display region and for sensing a plurality of pixels provided in a first display region, And a second data driver including a second group of source driver ICs for supplying data voltages to the second display area and sensing a plurality of pixels provided in the second display area. The organic light emitting display according to the present invention includes a first timing controller for supplying first image data to a first data driver and receiving L sensing data from a first data driver and a second timing controller for supplying second image data to a second data driver And a second timing controller for receiving R sensing data from the second data driver. The first timing controller of the present application receives a part of the R sensing data, and the second timing controller receives a part of the L sensing data.

The organic light emitting display according to the present invention can prevent the luminance difference from being visually recognized by performing the afterimage compensation operation between neighboring display panels when a plurality of display panels are disposed to realize one screen.

1 is a block diagram of an organic light emitting display according to the present application.
2 is a pixel circuit diagram according to an example of the present application.
3 is a plan view of the OLED display according to the present application.
4 is a plan view of the first and second display regions of the OLED display according to the present application.
5 is a plan view showing a first display region and a second adjacent portion of the OLED display according to the present application.
6 is a plan view showing a second display region and a first adjacent portion of the OLED display according to the present application.
7 is a block diagram of an OLED display according to a first embodiment of the present application.
8 is a schematic diagram showing the sensing and use range of the sensing data of the first display region of the organic light emitting diode display according to the present application.
9 is a schematic diagram showing the sensing and use range of the sensing data of the second display area of the organic light emitting display according to the present application.
10 is a block diagram of a first timing controller according to the first embodiment of the present application.
11 is a block diagram of a second timing controller according to the first embodiment of the present application.
12 is a block diagram of an OLED display according to a second embodiment of the present application.
13 is a block diagram of the first and second timing controllers according to the second embodiment of the present application.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present application, however, is not intended to be limited to the embodiments shown herein but is to be construed in a wide variety of forms, with the understanding that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and this application is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers and the like disclosed in the drawings for describing the embodiments of the present application are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Where the terms "comprises," "having," "consisting of," and the like are used in this specification, other portions may be added as long as "only" is not used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

The terms "X-axis direction "," Y-axis direction ", and "Z-axis direction" should not be construed solely by the geometric relationship in which the relationship between them is vertical, It may mean having directionality.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, May refer to any combination of items that may be presented from more than one.

It is to be understood that each of the features of the various embodiments of the present application may be combined or combined with each other, partially or wholly, and technically various interlocking and driving are possible, and that the embodiments may be practiced independently of each other, It is possible.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an organic light emitting display according to the present application. 2 is a circuit diagram of a pixel P according to an example of the present application. 3 is a plan view of the OLED display according to the present application.

The organic light emitting display according to the present invention includes a display panel 10, a first gate driver 20, a second gate driver 30, a first data driver 310, a second data driver 320, A controller 500, and a second timing controller 600.

The display panel 10 includes a lower substrate and an upper substrate. In the lower substrate, gate lines (G1 to Gn, n is a positive integer of 2 or more), data lines (D1 to Dm, m are positive integers of 2 or more), sensing lines (S1 to Sm) Are formed in the pixel array PA. Each of the pixels P may be connected to any one of the gate lines G1 to Gn, the data lines D1 to Dm, and the sensing lines S1 to Sm.

Each of the pixels P includes an organic light emitting diode (OLED) and a pixel driving part PD for supplying current to the organic light emitting diode OLED and the jth sensing line Sj. In FIG. 2, for convenience of explanation, a data line DLj, a j-th sensing line Sj, a k (k is an integer satisfying 1? K (j is a positive integer satisfying 1? Only the pixels P connected to the gate line Gk and the kth sensing signal line SSk are shown. The kth sensing signal line SSk is provided parallel to the kth gate line Gk.

The organic light emitting diode OLED emits light according to the current supplied through the driving transistor DT. The anode electrode of the organic light emitting diode OLED is connected to the source electrode of the driving transistor DT and the cathode electrode thereof is connected to a low potential voltage line ELVSSL (low potential power supply line) ELVSSL supplied with a low potential supply voltage ELVSS lower than the high potential supply voltage ELVDD .

The organic light emitting diode OLED may include an anode electrode, a hole transporting layer, an organic light emitting layer, an electron transporting layer, and a cathode electrode. have. In the organic light emitting diode (OLED), when a voltage is applied to the anode electrode and the cathode electrode, holes and electrons move to the organic light emitting layer through the hole transporting layer and the electron transporting layer, respectively.

The pixel driving part PD includes a driving transistor DT, a first transistor ST1 controlled by a gate signal of the kth gate line Gk, and a sensing signal of a kth sensing signal line SSk. And a second transistor ST2 and a capacitor C that are controlled. The pixel driving part PD supplies the data voltage VDATA of the jth data line DLj connected to the pixel P when the gate signal is supplied from the kth gate line Gk connected to the pixel P in the display mode, And supplies the current of the driving transistor DT to the organic light emitting diode OLED according to the data voltage VDATA. The pixel driving part PD supplies the current of the driving transistor DT to the jth sensing line SL connected to the pixel P when the sensing signal is supplied from the kth sensing signal line SSk connected to the pixel P in the sensing mode, (Sj).

The driving transistor DT is provided between the high potential voltage line ELVDDL and the organic light emitting diode OLED. The driving transistor DT adjusts the current flowing from the high potential voltage line ELVDDL to the organic light emitting diode OLED according to the voltage difference between the gate electrode and the source electrode. The gate electrode of the driving transistor DT is connected to the first electrode of the first transistor ST1. The source electrode of the driving transistor DT is connected to the anode electrode of the organic light emitting diode OLED. The drain electrode of the driving transistor DT is connected to the high- And may be connected to a high potential voltage line (ELVDDL) to be supplied.

The first transistor ST1 is turned on by the k-th gate signal of the k-th gate line Gk to supply the voltage of the j-th data line DLj to the gate electrode of the driving transistor DT. The gate electrode of the first transistor ST1 is connected to the kth gate line Gk and the first electrode thereof is connected to the gate electrode of the driving transistor DT and the second electrode thereof is connected to the jth data line DLj . The first transistor ST1 may be referred to as a scan transistor.

The second transistor ST2 is turned on by the kth sensing signal of the kth sensing signal line SSk to connect the jth sensing line Sj to the source electrode of the driving transistor DT. The gate electrode of the second transistor ST2 is connected to the kth sensing signal line SSk and the first electrode thereof is connected to the jth sensing line Sj and the second electrode thereof is connected to the source electrode of the driving transistor DT. Can be connected. The second transistor ST2 may be referred to as a sensing transistor.

The capacitor C is provided between the gate electrode and the source electrode of the driving transistor DT. The capacitor C stores the difference voltage between the gate voltage of the driving transistor DT and the source voltage.

2, the driving transistor DT and the first and second transistors ST1 and ST2 are formed of an N-type MOSFET (Metal Oxide Semiconductor Field Effect Transistor). However, the present invention is not limited thereto. The driving transistor DT and the first and second transistors ST1 and ST2 may be formed of a P-type MOSFET. Also, the first electrode may be a source electrode and the second electrode may be a drain electrode, but the present invention is not limited thereto. For example, the first electrode may be a drain electrode and the second electrode may be a source electrode.

The data voltage VDATA of the jth data line DLj is supplied to the gate electrode of the driving transistor DT when the scan signal is supplied to the kth gate line Gk, The initializing voltage of the j-th sensing line Sj is supplied to the source electrode of the driving transistor DT. The current of the driving transistor DT flowing in accordance with the voltage difference between the voltage of the gate electrode of the driving transistor DT and the voltage of the source electrode is supplied to the organic light emitting diode OLED in the display mode, Emits light in accordance with the current of the driving transistor DT. At this time, since the data voltage VDATA is a voltage compensated for the threshold voltage and electron mobility of the driving transistor DT, the current of the driving transistor DT does not depend on the threshold voltage and the electron mobility of the driving transistor DT .

In the sensing mode, the initializing voltage of the jth sensing line Sj is supplied to the source electrode of the driving transistor DT when the sensing signal is supplied to the kth sensing signal line SSk. Further, when the sensing signal is supplied to the kth sensing signal line SSk, the second transistor ST2 is turned on to drive the driving transistor DT in accordance with the voltage difference between the voltage of the gate electrode of the driving transistor DT and the voltage of the source electrode So that the current of the transistor DT flows to the jth sensing line Sj.

The pixel P receives the data voltage of the data line when the gate signal is supplied to the gate line, and emits light at a predetermined brightness according to the supplied data voltage. The upper substrate functions as an encapsulating substrate.

The first gate driver 20 is connected to the gate lines G1 to Gn. The first gate driver 20 receives the first gate control signal GCS1 from the first timing controller 500 and generates gate signals according to the first gate control signal GCS1 to generate gate lines G1 to Gn .

And the second gate driver 30 is connected to the gate lines G1 to Gn. The second gate driver 30 receives the second gate control signal GCS2 from the second timing controller 600 and generates gate signals according to the second gate control signal GCS2 to generate gate lines G1 to Gn .

The first and second gate drivers 20 and 30 may be provided in a non-display area corresponding to the periphery of the display area PA of the display panel 10 in a GIP (Gate In Panel) manner. In this case, the first gate driver 20 may be provided outside the left side of the display area PA, and the second gate driver 30 may be provided outside the right side of the display area PA.

The first data driver 310 includes the first group of source driver ICs 311. Each of the source driver ICs 311 of the first group receives the first video data DATA1 and the first data control signal DCS1 from the first timing controller 500 and supplies them to the first data control signal DCS1 And converts the first video data DATA1 into analog data voltages. The source driver ICs 311 of the first group supply data voltages to some of the data lines D1 to Dm.

The first data control signal DCS1 includes a first source start signal, a first source sampling clock, and a first source output enable signal. can do. The first source start signal is a signal for controlling the data sampling start time of the first data driver 310. The first source sampling clock is a clock signal for controlling the sampling operation of the first data driver 310 based on the rising or falling edge. The first source output enable signal is a signal for controlling the data voltage output of the first data driver 310.

The first data driver 310 generates L sensing data SL using voltages or currents sensed by sensing lines connected to the first data driver 310 among the sensing lines S1 to Sm. The L sensing data SL is data obtained by sensing pixels P arranged in a partial area of the display panel 10. The first data driver 310 supplies the L sensing data SL to the first timing controller 500.

And the second data driver 320 includes a second group of source driver ICs 321. [ Each of the source driver ICs 321 of the second group receives the second video data DATA2 and the second data control signal DCS2 from the second timing controller 600 and supplies them to the second data control signal DCS2 And converts the second image data (DATA2) into analog data voltages. The source driver ICs 321 of the second group supply the data voltages to another part of the data lines D1 to Dm, for example, the remaining data lines.

The second data control signal DCS2 includes a second source start signal, a second source sampling clock, and a second source output enable signal . The second source start signal is a signal for controlling the data sampling start time of the second data driver 320. The second source sampling clock is a clock signal for controlling the sampling operation of the second data driver 320 based on the rising or falling edge. The second source output enable signal is a signal for controlling the data voltage output of the second data driver 320.

The second data driver 320 generates R sensing data SR using voltages or currents sensed by the sensing lines connected to the second data driver 320 among the sensing lines S1 to Sm. The R sensing data SR is data obtained by sensing the pixels P disposed in an area other than the area where the L sensing data SL of the display panel 10 is sensed. The second data driver 320 supplies the right sensing data SR to the second timing controller 600.

Each of the source driver ICs 311 and 321 may be made of a driving chip. Each of the source driver ICs 311 of the first data driver 310 may be mounted on the first source flexible film 42. Each of the source driver ICs 321 of the second data driver 320 may be mounted on the second source flexible film 52. Each of the first and second source flexible films 42 and 52 can be implemented as a tape carrier package or a chip-on film and can be bent or bent. Each of the first and second source flexible films 42 and 52 may be attached to the non-display area of the display panel 10 in a TAB manner using an anisotropic conductive film, thereby causing the source driver ICs 311 and 321 May be connected to the data lines D1 to Dm.

The first source flexible films 42 may be attached to a first source printed circuit board 45 and the second source flexible films 52 may be attached to a second source printed circuit board 55, Lt; / RTI > The first and second source printed circuit boards 45, 55 may be flexible printed circuit boards that can be bent or bent.

The first timing controller 500 receives the first video data DATA1 and the first timing signals TS1 from the scaler 80. [ The first timing signals TS1 may include a first vertical sync signal, a first horizontal sync signal, a first data enable signal, And may include a first dot clock. The first vertical synchronizing signal is a signal defining one frame period, the first horizontal synchronizing signal is a signal defining one horizontal period, the first data enable signal is a signal indicating valid data output, and the first dot clock Is a clock signal having a predetermined period.

The first timing controller 500 generates a first data control signal DCS1 for controlling the operation timing of the first data driver 310 based on the first timing signals TS1. The first timing controller 500 outputs the first video data DATA 1 and the first data control signal DCS 1 to the second data driver 320.

The first timing controller 500 receives the L sensing data SL from the first data driver 310. The first timing controller 500 includes external compensation for compensating the threshold voltage of the driving transistors DT of the pixels P arranged in the left region of the display panel using the L sensing data SL, ) In the image signal.

The first timing controller 500 is mounted on the control printed circuit board 90. The control printed circuit board 90 and the first source printed circuit board 45 may be connected via a flexible circuit board 91 such as a flexible flat cable (FFC) or a flexible printed circuit (FPC).

The second timing controller 600 receives the second video data DATA2 and the second timing signals TS2 from the scaler 80. [ The second timing signals TS2 may include a second vertical sync signal, a second horizontal sync signal, a second data enable signal, And may include a second dot clock. The second vertical synchronizing signal is a signal defining one frame period, the second horizontal synchronizing signal is a signal defining one horizontal period, the second data enable signal is a signal indicating valid data output, The clock is a clock signal having a predetermined period.

The second timing controller 600 generates a gate control signal GCS for controlling the operation timings of the first gate driver 20 and the second gate driver 30. The second timing controller 600 outputs a gate control signal GCS to the first gate driver 20 and the second gate driver 30. The gate control signal GCS may include a gate start signal GSP, a gate shift clock GSC, and a gate output enable signal GOE. The gate start signal is a signal for controlling the output timing of the first gate pulse in one frame period. The gate shift clock is a clock signal for shifting the gate start signal. The gate output enable signal is a signal for controlling the output width of each of the gate signals.

1 illustrates that the second timing controller 600 generates and outputs a gate control signal GCS. 1, the second timing controller 600 is a master timing controller and the first timing controller 500 is a slave timing controller. However, it should be noted that the present invention is not limited thereto . The first timing controller 500 may generate and output the gate control signal GCS and the first and second timing controllers 500 and 600 may generate and output the gate control signal GCS.

The second timing controller 600 generates a second data control signal DCS2 for controlling the operation timing of the second data driver 320 based on the second timing signals TS2. The second timing controller 600 outputs the second video data DATA2 and the second data control signal DCS2 to the second data driver 320. [

The second timing controller 600 receives the R sensing data SR from the second data driver 320. The second timing controller 600 includes external compensation for compensating the threshold voltage of the driving transistors DT of the pixels P arranged in the right region of the display panel using the R sensing data SR, ) In the image signal.

The second timing controller 600 is mounted on the control printed circuit board 90. The control printed circuit board 90 and the second source printed circuit board 55 may be connected via a flexible circuit board 91 such as a flexible flat cable (FFC) or a flexible printed circuit (FPC).

1 and 3 illustrate that the OLED display according to the present application includes the first and second timing controllers 500 and 600, but it should be noted that the present invention is not limited thereto. That is, the organic light emitting display according to the present application may include three or more timing controllers.

The scaler 80 receives image data (DATA) from an external host system. The scaler 80 generates the first video data DATA1 and the second video data DATA2 from the video data DATA on the basis of the resolution information and the like of the display panel 10. [ The scaler 80 supplies the first image data DATA1 to the first timing controller 500 and the second image data DATA2 to the second timing controller 600. [ The scaler 80 may be mounted on the control printed circuit board 90. Alternatively, the scaler 80 may be mounted on an external host system.

The organic light emitting display according to the present invention includes the first and second gate drivers 20 and 30 and the first and second data drivers 310 and 310 using the first and second timing controllers 500 and 600, 320). Accordingly, the present invention can be applied to an OLED display device having a resolution higher than a resolution that can be controlled by one timing controller. The organic light emitting display according to the present invention can reduce the time and cost required to develop a new timing controller to realize a high resolution display.

4 is a plan view of the first and second display regions 100 and 200 of the OLED display according to the present application. The first display region 100 has a first normal portion 110 and a first adjacent portion 120. The second display area 200 has a second normal portion 210 and a second adjacent portion 220. The first display area 100 is controlled by the first timing controller 500 at the driving timing and the second display area 2000 is controlled by the second timing controller 600 at the driving timing.

The first display area 100 can receive the data voltages from the source driver ICs 311 of the first group. 1 and 3, the source driver ICs 311 of the first group supply data voltages to some of the data lines D1 to Dm. Therefore, the source driver ICs 311 of the first group can be set to supply the data voltages to the data lines D1 to Dm provided on the first display area 100. [

In addition, a plurality of pixels P provided in the first display region 100 can be sensed by the source driver ICs 311 of the first group. 1 and 3, the source driver ICs 311 of the first group use the voltage or current sensed by the sensing lines S1 to Sm connected to the pixels P arranged in a certain region Thereby generating L sensing data SL. Accordingly, the source driver ICs 311 of the first group are connected to the plurality of pixels P provided in the first display area 100 by using the sensing lines S1 to Sm provided on the first display area 100 Sensing can be performed.

And the second display area 200 can receive the data voltages from the source driver ICs 321 of the second group. 1 and 3, the source driver ICs 321 of the second group supply the data voltages to some of the data lines D1 to Dm. Therefore, the source driver ICs 321 of the second group can be set to supply the data voltages to the data lines D1 to Dm provided on the second display area 200. [

Further, the plurality of pixels P provided in the second display region 200 can be sensed by the source driver ICs 321 of the second group. 1 and 3, the source driver ICs 321 of the second group use the voltage or current sensed by the sensing lines S1 to Sm connected to the pixels P arranged in a certain region To generate R sensing data SR. Accordingly, the source driver ICs 321 of the second group are connected to the plurality of pixels P provided in the second display area 200 by using the sensing lines S1 to Sm provided on the second display area 200, Sensing can be performed.

The first normal portion 110 is an area not adjacent to the second display area 200. The first adjacent portion 120 is an area adjacent to the second display area 200. The second normal portion 210 is an area that is not adjacent to the first display area 100. The second adjacent portion 220 is an area adjacent to the first display area 100. The first and second normal portions 210 and 220 define regions in which the first and second display regions 100 and 200 are not adjacent to each other and are independently controlled by a single timing controller. The first and second adjacent portions 120 and 220 define a region on the boundary where the first and second display regions 100 and 200 contact with each other.

More specifically, the first neighboring portion 120 may include a pixel (pixel) sensing voltage or current in a sensing line disposed closest to the second display region 200 among the sensing lines disposed on the first display region 100, It is the area where the column is placed. The second neighboring portion 220 may include a pixel array for sensing a voltage or a current in a sensing line disposed closest to the first display region 100 among the sensing lines disposed on the second display region 100 Area.

The first and second adjacent portions 120 and 220 are not the edge portions of the display panel 10 but form the center line on the single display panel 10 and realize a single image. However, when the compensation operation is separately performed using the first and second timing controllers 500 and 600 in the first display area 100 and the second display area 200, The two adjacent portions 120 and 220 are also recognized as edge portions and are edge processed. In particular, when the edge processing is performed, the finishing operation of the screen is performed in such a manner as to reduce the brightness of pixels disposed at the center of the screen. However, when the finishing operation is performed at the center of the screen, undesirable luminance reduction phenomenon is visually recognized Occurs.

The first timing controller 500 of the organic light emitting display according to the present invention receives a part of the R sensing data SR and the second timing controller 600 receives a part of the L sensing data SL.

The first timing controller 500 of the organic light emitting display according to the present invention performs external compensation and residual image compensation on the first display area 100. [ Nevertheless, the first timing controller 500 receives a part of the R sensing data SR sensed in the second display area 200 as L sensing data SL. In this case, the first adjacent portion 120 in the first display area 100 is not recognized as an edge portion, and the edge portion is not processed.

The second timing controller 600 of the organic light emitting diode display according to the present invention performs external compensation and residual image compensation on the second display area 100. [ Nevertheless, the second timing controller 600 receives a part of the L sensing data SL sensed in the first display area 100 as R sensing data SR. In this case, the second adjacent portion 220 in the second display area 200 is not recognized as an edge portion, and the edge portion is not processed.

In the organic light emitting display according to the present invention, the first and second adjacent portions 120 and 220 are not edge-processed. The organic light emitting display according to the present invention performs the external compensation and the residual compensation in the first and second adjacent portions 120 and 220 in the same manner as the first and second normal portions 110 and 210. Accordingly, the organic light emitting display according to the present application can prevent a problem that the brightness of the first and second adjacent portions 120 and 220 is reduced.

5 is a plan view showing a first display region 100 and a second adjacent portion 220 of the OLED display according to the present application.

The first timing controller 500 according to the present invention receives sensing data of the first display area 100 and the second neighboring part 220. [ That is, the first timing controller 500 according to the present invention not only includes sensing data of the first display region 100, which is an area for performing threshold voltage compensation of the driving transistor DT and deterioration compensation of the organic light emitting diode OLED, And the sensing data of the second neighboring portion 220 adjacent to the first display region 100 in the second display region 200 are supplied together.

When the first timing controller 500 receives the sensing data of the second neighboring portion 220, the external compensation and the afterimage compensation of the first neighboring portion 120 are performed by referring to the sensing data of the second neighboring portion 220 Can be performed. In this case, more accurate compensation of the first adjacent portion 120 is possible.

6 is a plan view showing a second display region 200 and a first adjacent portion 120 of the OLED display according to the present application.

The second timing controller 600 according to the present invention receives sensing data of the second display region 200 and the second neighboring portion 120. That is, the second timing controller 600 according to the present invention not only includes the sensing data of the second display region 200, which is an area in which the threshold voltage compensation of the driving transistor DT and the deterioration compensation of the organic light emitting diode OLED are performed, And the sensing data of the first adjacent area 120 adjacent to the second display area 200 in the first display area 100 are supplied together.

When the second timing controller 500 receives the sensing data of the first adjacent portion 120, the external compensation and the afterimage compensation of the second neighboring portion 220 are performed by referring to the sensing data of the first neighboring portion 120 Can be performed. In this case, more accurate compensation of the second adjacent portion 120 is possible.

The present application performs more accurate compensation for the first and second adjacent portions 120, Accordingly, when one image is implemented, a luminance difference may occur between the first adjacent portion 220 and the second neighboring portion 220, or a difference in color tone may be generated at the boundary between the first and second display regions 100 and 200 It is possible to prevent a phenomenon in which a user is visually recognized.

In this case, the first timing controller 500 according to the present invention receives a part of the sensing data of the second adjacent portion 220, and the second timing controller 600 receives the sensing data of the first adjacent portion 120 You can set up to receive some.

On the first and second adjacent portions 120 and 200, the number of pixels constituting one pixel column are arranged. One pixel in the pixel column is set according to the resolution in the column direction. At this time, the sensing data information of the pixels corresponding to the resolution is not required. For example, in the case of an organic light emitting display device having a resolution of 1680 × 1024, 1024 pixels P are provided in one pixel column. 1024 pixels P are also provided in the first and second adjacent portions 120 and 220. At this time, the first timing controller 500 does not use all of the sensing data of 1024 pixels (P) of the second adjacent portion 220, and if necessary, senses 1 to 1023 pixels (P) Data can be selected and used. The second timing controller 600 does not use all of the sensing data of 1024 pixels P of the first adjacent portion 120 and generates sensing data of at least 1 and at most 1023 pixels P Can be selected and used.

In order for the first timing controller 500 to receive the sensing data of the second display area 200, an interface capable of physical connection or transfer of data between the first timing controller 500 and the second display area 200 . In order for the second timing controller 600 to receive the sensing data of the first display area 100, an interface that enables physical connection or transfer of data between the second timing controller 600 and the first display area 100 . When the amount of supplied sensing data increases, the physical connection between the timing controller and the display area or the complexity of the interface increases. As a result, the manufacturing cost also increases.

The first timing controller 500 according to the present invention receives a part of the sensing data of the second adjacent portion 220 and the second timing controller 600 supplies a part of the sensing data of the first adjacent portion 120 Receive. In this case, the amount of the sensing data supplied to the second timing controller 600 in the first display area 100 and the amount of sensing data supplied to the first timing controller 500 in the second display area 200 are minimized . Accordingly, the present application minimizes an increase in the physical connection or interface complexity between the timing controller and the display area, and also minimizes the increase in manufacturing cost.

The first data driver 310 may be configured to drive the plurality of pixels P provided in the first display area 100 in order to generate sensing data of a plurality of pixels P provided on the first display area 100. [ (DT). In order to generate sensing data of a plurality of pixels P provided on the second display area 200, the second data driver 320 may include a plurality of pixels P provided in the second display area 200, And senses a change in the characteristics of the driving transistor DT.

The characteristic change of the driving transistor DT differs in the first and second display regions 100 and 200 and also varies depending on the physical properties of the driving transistor DT of each of the plurality of pixels P. [ Therefore, when sensing the characteristic change of the driving transistor DT of each of the plurality of pixels P, it is possible to perform compensation to reduce the deviation of each of the plurality of pixels P. [

More specifically, a change in the characteristics of the driving transistor DT of the plurality of pixels P provided in the first and second display regions 100 and 200 is caused by a change in the threshold voltage Vth or a change in the electron mobility electron mobility.

The driving transistor DT can be driven in a linear region or a saturation region according to a threshold voltage, and the magnitude of the driving current flowing through the organic light emitting diode OLED changes with a change in the threshold voltage. The electron mobility is a physical coefficient relating to the property of moving electrons. The magnitude of the driving current flowing through the organic light emitting diode (OLED) changes depending on the change of the electron mobility. It is necessary to sense a change in a threshold voltage Vth or a change in electron mobility to sense a change in a driving current flowing in the organic light emitting diode OLED and to perform a compensation operation accordingly.

7 is a block diagram of an OLED display according to a first embodiment of the present application.

The OLED display according to the first embodiment of the present invention supplies data voltages to neighboring first and second display areas 100 and 200 and a first display area 100, A first data driver 310 including a first group of source driver ICs 311-1 to 311-N for sensing pixels P provided in the second display region 200, And a second data driver 320 including a second group of source driver ICs 321-1 to 321-N for sensing the pixels P provided in the second display area 200. [

The OLED display according to the first embodiment of the present invention supplies first image data DATA1 to the first data driver 310 and L sensing data SR from the first data driver 310 The second timing controller 500 supplies the second image data DATA2 to the first timing controller 500 and the second data driver 320 and receives the R sensing data SR from the second data driver 320, (600). The first timing controller 500 receives a part of the R sensing data SR and the second timing controller 600 receives a part of the L sensing data SL.

More specifically, the first timing controller 500 according to the first embodiment of the present invention controls the source driver ICs 321-1 to 321-N of the second group, the source driver ICs 321-1 to 321- (321-1).

The source driver IC 321-1 adjacent to the first display area 100 of the source driver ICs 321-1 to 321-N of the second group is connected to the source driver ICs 321-1 of the second display area 200 among the sensing lines And senses a voltage or a current supplied to a sensing line disposed closest to the first display area 100. [ That is, the source driver IC 321-1 adjacent to the first display region 100 of the source driver ICs 321-1 to 321-N of the second group is connected to the pixels P ). ≪ / RTI >

The second timing controller 600 according to the first embodiment of the present application can also control the source driver ICs 311-1 to 311-N adjacent to the second display region 600 of the first group of source driver ICs 311-1 to 311- -N).

The source driver IC 311-N adjacent to the second display region 200 among the source driver ICs 311-1 to 311-N of the first group is connected to one of the sensing lines arranged on the first display region 100 And senses a voltage or a current supplied to the sensing line arranged closest to the second display area 200. [ That is, the source driver IC 311-N adjacent to the second display region 200 among the source driver ICs 311-1 to 311-N of the first group is connected to the pixels P ). ≪ / RTI >

That is, the timing controller according to the first embodiment of the present application is physically connected to the source driver IC of the adjacent display area. In this case, the first timing controller 500 controls the first timing controller 500 and the second timing controller 500 from the source driver IC 321-1 adjacent to the first display area 100 of the source driver ICs 321-1 through 321- The sensing data of the sensing unit 220 can be directly supplied. In addition, the second timing controller 600 receives, from the source driver IC, the source driver ICs 311-1 to 311-N from the source driver ICs 311-N adjacent to the second display region 200 of the first group of source driver ICs 311-1 to 311- The sensing data of the adjacent portion 210 can be directly supplied. Accordingly, the first and second timing controllers 500 and 600 according to the first embodiment of the present invention are provided with two wiring lines 1 and 2 for connection to two source driver ICs without a separate interface, The sensing data of the sensors 120 and 220 can be used.

8 is a schematic diagram showing the sensing and use range of the sensing data of the first display region of the organic light emitting diode display according to the present application. 9 is a schematic diagram showing the sensing and use range of the sensing data of the second display area of the organic light emitting display according to the present application.

As described above, the timing controller according to the present invention senses not only the display area for performing the compensation operation but also the sensing data of the area adjacent thereto. Particularly, although the edge portion is not provided on the display panel 10, the sensing data of the area adjacent to the edge processing portion of the display area is sensed (SENSE).

However, the sensing data used for actual compensation (USE) is the sensing data of the display area performing the compensation operation. That is, the sensing data of the adjacent area is sensed in order to recognize that edge processing is not performed since the edge is not excited by the sensing. The sensing data of the adjacent area can be referred to, but the sensing data may be different even in the case of adjacent pixel strings, so the present invention is not limited thereto.

10 is a block diagram of the first timing controller 500 according to the first embodiment of the present application. The first timing controller 500 includes a first input unit 510 and a first operation unit 520.

The first input unit 510 receives the L sensing data SL1 to SLN and a portion SR1 of the R sensing data. The portion SR1 of the R sensing data is sensing data supplied from the source driver IC 321-1 adjacent to the first display region 100 of the source driver ICs 321-1 to 321-N of the second group. The first input unit 510 includes a first main input unit 511 and a first auxiliary input unit 512. The first main input unit 511 receives the L sensing data SL1 to SLN. The first auxiliary input unit 512 receives a portion SR1 of R sensing data.

The first calculation unit 520 receives the L sensing data SL1 to SLN and a part SR1 of the R sensing data from the first input unit 510. [ The first calculation unit 520 performs external compensation and residual compensation of the first display area 100 using the L sensing data SL1 to SLN. The first calculation unit 520 includes a first algorithm storage unit 521 storing algorithms relating to external compensation and residual image compensation of the pixels P arranged in the first display area 100.

11 is a block diagram of a second timing controller 600 according to the first embodiment of the present application. The second timing controller 600 includes a second input unit 610 and a second operation unit 620.

The second input unit 610 receives the R sensing data SR1 to SRN and a part of the L sensing data SLN. A part of the L sensing data SLN is sensing data supplied from the source driver IC 311-N adjacent to the second display area 200 among the source driver ICs 311-1 to 311-N of the first group. The second input unit 610 includes a second main input unit 611 and a second auxiliary input unit 612. The second main input unit 611 receives R sensing data SR1 to SRN. The second auxiliary input unit 612 receives a portion SLN of L sensing data.

The second arithmetic operation unit 620 receives R sensing data SR1 to SRN and a part of the L sensing data SLN from the second input unit 610. The second calculator 620 performs external compensation and residual compensation of the second display area 200 using the R sensing data SR1 to SRN. The second calculation unit 620 includes a second algorithm storage unit 621 storing algorithms relating to external compensation and residual image compensation of the pixels P arranged in the second display area 200. [

The first and second timing controllers 500 and 600 according to the first embodiment of the present invention further include first and second auxiliary input parts 512 and 612 in addition to the first and second main input parts 511 and 611, . The first and second main input units 511 and 611 have the same number of input pins as the number of the source driver ICs 311-1 to 311-N and 321-1 to 321-N of the first and second groups . On the other hand, the first and second auxiliary input parts 512 and 612 are connected to one source driver IC 321-1 and 311-N. Accordingly, the first and second auxiliary input portions 512 and 612 each have one input pin.

Accordingly, the first and second input units 510 and 610 according to the first embodiment of the present application need only increase the number of input pins relative to the conventional timing controller, while increasing the number of input pins required by the first and second timing controllers 500 and 600 Sensing data can be supplied.

In addition, the first and second calculation units 520 and 620 according to the first embodiment of the present application receive the sensing data and perform external compensation and residual image compensation of the first and second display areas 100 and 200 . The first calculation unit 520 may receive the sensing data of the second neighboring unit 220 and normally perform the external compensation and the residual compensation without performing the edge process in the first neighboring unit 120. [ The second calculator 620 may receive the sensing data of the first neighboring portion 120 and perform the external compensation and the residual compensation without performing the edge processing in the second neighboring portion 220. [ Accordingly, the first embodiment of the present application provides a method and apparatus for performing an external compensation and a residual compensation in a first and a second adjacent portions 120 and 220, The brightness of the display device can be uniformly maintained.

12 is a block diagram of an OLED display according to a second embodiment of the present application.

The organic light emitting display according to the second embodiment of the present invention supplies data voltages to neighboring first and second display areas 100 and 200 and a first display area 100, A first data driver 310 including a first group of source driver ICs 311-1 to 311-N for sensing pixels P provided in the second display region 200, And a second data driver 320 including a second group of source driver ICs 321-1 to 321-N for sensing the pixels P provided in the second display area 200. [

The organic light emitting display according to the second embodiment of the present invention supplies the first image data DATA1 to the first data driver 310 and the L sensing data SR from the first data driver 310 The second timing controller 500 supplies the second image data DATA2 to the first timing controller 500 and the second data driver 320 and receives the R sensing data SR from the second data driver 320, (600). The first timing controller 500 receives a part of the R sensing data SR and the second timing controller 600 receives a part of the L sensing data SL.

More specifically, the first timing controller 500 according to the second embodiment of the present application is connected to the second timing controller 600. The connection method may be a physical wiring connection between the IC chips, an indirect connection through the scaler 80, or a master / slave interface (M / S Interface).

The first and second timing controllers 500 and 600 according to the second embodiment of the present application can be connected to each other to exchange data. The second timing controller 600 can transfer the L sensing data SL supplied from the first timing controller 500 as needed. Also, the R-sensing data SR supplied from the second timing controller 600 can be transferred to the first timing controller 500 as needed. Accordingly, according to the second embodiment of the present application, the sensing data between the first and second timing controllers 500 and 600 can be referred to more smoothly.

13 is a block diagram of the first and second timing controllers 500 and 600 according to the second embodiment of the present application.

The first timing controller 500 according to the second embodiment of the present application includes a first input unit 510, a first operation unit 520, and a first interface unit 530. The second timing controller 600 includes a second input unit 610, a second operation unit 620, and a second interface unit 630.

The first input unit 510 has a first main input unit 511. The first main input unit 511 receives the L sensing data SL1 to SLN.

The first calculation unit 520 receives the L sensing data SL1 to SLN from the first input unit 510. [ The first calculation unit 520 receives a portion SR1 of the R sensing data from the first interface unit 530. [ The first calculation unit 520 performs external compensation and residual compensation of the first display area 100 using the L sensing data SL1 to SLN. The first calculation unit 520 includes a first algorithm storage unit 521 storing algorithms relating to external compensation and residual image compensation of the pixels P arranged in the first display area 100.

The first interface unit 530 includes a first transmission unit 531 and a first reception unit 532. The first transmission unit 531 receives a portion (SLN) of the L sensing data from the first input unit 510. The first transmission unit 531 transmits a portion (SLN) of L sensing data to the second interface unit 630. The first receiving unit 532 receives a part SR1 of R sensing data from the second interface unit 630. [ The first receiving unit 532 inputs a part SR1 of the R sensing data to the first calculating unit 520. [

The second input unit 610 has a second main input unit 521. The second main input unit 511 receives the R sensing data SR1 to SRN.

The second calculation unit 620 receives the R sensing data SR1 to SRN from the second input unit 610. [ The second operation unit 620 receives a portion (SLN) of L sensing data from the second interface unit 630. The second calculator 620 performs external compensation and residual compensation of the second display area 200 using the R sensing data SR1 to SRN. The second calculation unit 620 includes a second algorithm storage unit 621 storing algorithms relating to external compensation and residual image compensation of the pixels P arranged in the second display area 200. [

The second interface unit 630 includes a second transmitter 631 and a second receiver 632. The second transmitting unit 631 receives a part SR1 of R sensing data from the second input unit 610. [ The second transmitting unit 631 transmits a part SR1 of the R sensing data to the first interface unit 530. [ The second receiving unit 632 receives a portion (SLN) of L sensing data from the first interface unit 530. The second receiving unit 632 inputs a part (SLN) of the L sensing data to the second calculating unit 620.

The first and second interface units 530 and 630 according to the second embodiment of the present invention receive some of the sensing data from the first and second input units 510 and 610, respectively. The number or the internal logic of the output pins of the first and second input units 510 and 610 can be controlled to prevent the first and second interface units 530 and 630 from receiving unnecessary sensing data. As a result, the data to the interface units 530 and 630 increase more than necessary and load can be prevented.

The first and second interface units 530 and 630 according to the second embodiment of the present invention have first and second transmission units 531 and 631 and first and second reception units 532 and 632, respectively. The first and second interface units 530 and 630 transmit the part SLN and SR1 of the L and R sensing data to the first and second transmission units 531 and 631 and receive the first and second reception units 532 and 632 (SLN, SR1) of the L and R sensing data. Accordingly, the difference in the size of the sensing data can minimize the difference between the transmitting unit and the receiving unit. As a result, it is possible to minimize an imbalance in data transmission / reception between the interface units.

In addition, the first and second calculation units 520 and 620 according to the second embodiment of the present application receive the sensing data and perform external compensation and residual image compensation of the first and second display areas 100 and 200 . The first calculation unit 520 may receive the sensing data of the second neighboring unit 220 and normally perform the external compensation and the residual compensation without performing the edge process in the first neighboring unit 120. [ The second calculator 620 may receive the sensing data of the first neighboring portion 120 and perform the external compensation and the residual compensation without performing the edge processing in the second neighboring portion 220. [ Accordingly, the second embodiment of the present application provides a method and apparatus for performing an external compensation and a residual compensation in a first and a second adjacent portions 120 and 220, The brightness of the display device can be uniformly maintained.

The organic light emitting display according to the present invention can prevent the luminance difference from being visually recognized by performing the afterimage compensation operation between neighboring display panels when a plurality of display panels are disposed to realize one screen.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

10: display panel 20: first gate driver
30: second gate driver 310: first data driver
311, 321: source driver IC 42: first source flexible film
45: first source printed circuit board 320: second data driver
52: second source flexible film 55: second source printed circuit board
500: first timing controller 600: second timing controller
80: Scaler 90: Controlled printed circuit board
91: Flexible circuit board 100: First display area
110: first normal portion 120: first adjacent portion
200: second display area 210: second normal portion
220: second adjacent portion 510: first input portion
520: first calculation unit 530: first interface unit
610: second input unit 620: second operation unit
630:

Claims (12)

First and second display areas adjacent to each other;
A first data driver including a first group of source driver ICs for supplying data voltages to the first display region and sensing a plurality of pixels provided in the first display region;
A second data driver including a second group of source driver ICs for supplying data voltages to the second display region and sensing a plurality of pixels provided in the second display region;
A first timing controller which supplies first image data to the first data driver and receives L sensing data from the first data driver; And
And a second timing controller that supplies second image data to the second data driver and receives R sensing data from the second data driver,
Wherein the first timing controller receives a part of the R sensing data,
And the second timing controller receives a part of the L sensing data. The method according to claim 1,
Wherein the first timing controller is supplied with sensing data of a second adjacent portion which is an area adjacent to the first display area of the second display area,
Wherein the second timing controller is supplied with sensing data of a first adjacent portion of the first display region that is adjacent to the second display region. 3. The method of claim 2,
Wherein the first timing controller receives a part of the sensing data of the second adjacent portion and the second timing controller receives a portion of the sensing data of the first adjacent portion. The method according to claim 1,
Wherein the first data driver senses a characteristic change of a driving transistor of a plurality of pixels provided in the first display region,
And the second data driver senses a change in characteristics of the driving transistor of the plurality of pixels provided in the second display region. 5. The method of claim 4,
Wherein the characteristic change of the driving transistor of the plurality of pixels provided in the first and second display regions is a change of a threshold voltage or a change of an electron mobility. The method according to claim 1,
The first timing controller is connected to a source driver IC adjacent to the first display region of the source driver ICs of the second group,
And the second timing controller is connected to the source driver IC adjacent to the second display region of the first group of source driver ICs. The method according to claim 6,
Wherein the first timing controller comprises:
And a first input unit including a first main input unit receiving the L sensing data and a first auxiliary input unit receiving a part of the R sensing data,
The second timing controller includes:
And a second input unit including a second main input unit receiving the R sensing data and a second auxiliary input unit receiving a part of the L sensing data. 8. The method of claim 7,
Wherein the first timing controller comprises:
Further comprising a first calculation unit receiving a part of the L sensing data and the R sensing data from the first input unit and performing external compensation and residual compensation of the first display area using the L sensing data,
The second timing controller includes:
And a second arithmetic unit that receives a part of the R sensing data and the L sensing data from the second input unit and performs external compensation and residual compensation of the second display area using the R sensing data, Display device. The method according to claim 1,
Wherein the first timing controller and the second timing controller are connected to each other. 10. The method of claim 9,
Wherein the first timing controller includes a first input unit receiving the L sensing data and a first interface receiving a portion of the L sensing data,
Wherein the second timing controller includes a second input unit receiving the R sensing data and a second interface receiving a part of the R sensing data. 11. The method of claim 10,
Wherein the first interface unit transmits a part of the L sensing data to the second interface unit,
And the second interface transmits a part of the R sensing data to the first interface unit. 12. The method of claim 11,
Wherein the first timing controller comprises:
Receiving the L sensing data from the first input unit, receiving a part of the R sensing data from the first interface unit, and performing external compensation and residual image compensation of the first display area using the L sensing data Further comprising a first calculating section,
The second timing controller includes:
Receiving the R sensing data from the second input unit, receiving a part of the L sensing data from the second interface unit, and performing external compensation and residual image compensation of the second display area using the R sensing data And a second calculation unit.

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