KR102358558B1 - Organic light emitting display device - Google Patents

Abstract

The organic light emitting display device according to an example of the present application includes a display panel having a display area in which pixels displaying an image are located, a non-display area in which an image is not displayed outside the display area, and a display panel disposed in the non-display area to form a display panel. a driver IC for driving, and a lighting test switch element part disposed in the non-display area and disposed outside the driver IC, and a lighting test pad part inputting a lighting test signal to the lighting test switch element part, the lighting test switch element By applying the lighting test signal to the pixels, the width of the bezel of the organic light emitting diode display may be reduced.

Description

Organic light emitting display device {ORGANIC LIGHT EMITTING DISPLAY DEVICE}

This application relates to an organic light emitting display device.

In the information society, many technologies in the field of display devices for displaying visual information as images or images are being developed. Among display devices, an organic light emitting diode display displays an image using an organic light emitting diode that generates light by recombination of electrons and holes. The organic light emitting display device has a fast response speed and at the same time is able to express low grayscale according to self-luminescence, so it is in the spotlight as a next-generation display.

The organic light emitting diode display includes a display panel having a display area in which pixels displaying an image are provided, a non-display area that is disposed outside the display area and does not display an image, and a driver IC disposed in the non-display area to drive the display panel. include The organic light emitting diode display may have a structure in which a portion of the non-display area where the driver IC is disposed is folded toward the rear surface of the display area and bent.

Each pixel includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel to represent RGB colors. Auto Probe (Auto Probe, A/A), which is a lighting test that checks whether the respective red sub-pixels, green sub-pixels, and blue sub-pixels are driven by applying a lighting test signal to each sub-pixel to check whether there is a driving abnormality P) Perform the inspection.

The display device includes a lighting test switch element that receives a lighting test signal for performing the lighting test from the lighting test pad unit. The lighting test switch element part is provided inside the bezel, which is an area remaining after trimming to remove the lighting test pad part among the non-display areas of the display device. Accordingly, there is a problem in that the width of the bezel increases.

An object of the present application is to provide an organic light emitting display device in which the width of the bezel is reduced by providing a lighting test switch element outside the bezel or removing it so that it does not remain in the finished product.

An organic light emitting display device according to an example of the present application includes a display panel having a display area in which pixels displaying an image are located, a non-display area in which an image is not displayed outside the display area, and a display panel disposed in the non-display area. a driver IC for driving, and a lighting test switch element part disposed in the non-display area and disposed outside the driver IC, and a lighting test pad part inputting a lighting test signal to the lighting test switch element part, the lighting test switch element By applying the lighting test signal to the pixels, the width of the bezel of the organic light emitting diode display may be reduced.

An organic light emitting display device according to another example of the present application includes a display area in which pixels displaying an image are located, a display panel that is outside the display area and has a non-display area that does not display an image, and is disposed in the non-display area for display and a driver IC for driving the panel, and a lighting test switch element unit for lighting inspection of pixels and a lighting test pad unit for inputting a lighting test signal to the lighting test switch element unit. The driver IC according to another example of the present application receives the lighting test signal from the lighting test pad unit without passing through the lighting test switch element unit, and the area in which the driver IC is disposed is folded and bent toward the rear surface of the display area, so that the The width of the bezel can be reduced.

An organic light emitting display device according to another example of the present application includes a display panel having a display area including pixels and a non-display area outside the display area, a driver IC disposed in the non-display area to drive the display panel, and a drive and a lighting test routing line extending from the outside of the IC toward the display area and connected to a data line supplying a data voltage to the pixels, wherein the lighting test routing wire provides a lighting test signal to the pixels during the lighting test. Accordingly, the width of the bezel of the organic light emitting diode display may be reduced.

In the organic light emitting display device according to the present application, the width of the bezel of the display device can be reduced by providing a lighting test switch element and removing it so as not to remain in the final product of the organic light emitting display device.

The organic light emitting display device according to the present application can reduce the width of the non-display area by disposing the lighting test switch element outside the drive IC. In addition, since it is possible to check whether the driver IC is abnormal during the manufacturing process by applying the lighting test signal to the driver IC, unnecessary manufacturing costs for inspecting the driver IC can be reduced.

1 is a conceptual block diagram of an organic light emitting display device according to the present application.
2 is an internal circuit diagram of a pixel according to an example of the present application.
3 is a block diagram of an organic light emitting display device according to an example of the present application.
4 is a block diagram of an organic light emitting display device according to an example of the present application.
5 is a circuit diagram illustrating driving of a DEMUX unit of an organic light emitting display device according to an example of the present application.
6 is a waveform diagram illustrating driving of an organic light emitting display device according to an example of the present application.
7 is a plan view illustrating an organic light emitting display device according to another example of the present application.
8 is a plan view of an organic light emitting display device according to examples of the present application implemented as a smart watch.
9 is a schematic diagram modeling an antistatic unit as a circuit according to an example of the present application.
9 is a driving waveform simulation graph of the organic light emitting display device according to the present application.
10 is a graph showing the relationship between the width of a transistor for each RGB color of the organic light emitting diode display according to the present application and the corresponding current of the organic light emitting diode.

Advantages and features of the present application, and a method for achieving them will become apparent with reference to examples described below in detail in conjunction with the accompanying drawings. However, the present application is not limited to the examples disclosed below, but will be implemented in various different forms, and only examples of the present application allow the disclosure of the present application to be complete, and common knowledge in the technical field to which this application belongs It is provided to fully inform those who have the scope of the invention, and the present application is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, and thus the present application is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present application, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present application, the detailed description thereof will be omitted.

When 'including', 'having', 'consisting', etc. mentioned in this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish one component from another. Accordingly, the first component mentioned below may be the second component within the spirit of the present application.

"First horizontal axis direction", "second horizontal axis direction" and "vertical axis direction" should not be construed only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present application can function functionally It may mean to have a broader direction than within.

The term “at least one” should be understood to include all possible combinations of one or more related items. For example, the meaning of “at least one of the first, second, and third items” means that each of the first, second, or third items as well as two of the first, second and third items It may mean a combination of all items that can be presented from more than one.

Each feature of the various examples of the present application may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each example may be implemented independently of each other or may be implemented together in a related relationship. .

Hereinafter, an example of an organic light emitting display device according to the present application will be described in detail with reference to the accompanying drawings.

1 is a conceptual block diagram of an organic light emitting display device according to the present application. 2 is an internal circuit diagram of a pixel P according to an example of the present application.

1 to 2 , the organic light emitting display device according to the present application includes a display panel 100 , a gate driver 110 , a data driver 120 , and a timing controller (T-CON) 130 . includes

The display panel 100 includes a display area and a non-display area provided around the display area. The display area is an area in which pixels P are provided to display an image. The non-display area is located outside the display panel 100 and is an area that protects the display area from external impact. The display panel 100 is provided with gate lines GL1 to GLp, where p is a positive integer greater than or equal to 2), data lines DL1 to DLq, q is a positive integer greater than or equal to 2), and sensing lines SL1 to SLq. do. The data lines DL1 to DLq and the sensing lines SL1 to SLq may cross the gate lines GL1 to GLp. The data lines DL1 to DLq and the sensing lines SL1 to SLq may be parallel to each other. The display panel 100 may include a lower substrate on which the pixels P are provided and an upper substrate that performs an encapsulation function to protect the pixels P from external foreign substances.

Each of the pixels P may be connected to any one of the gate lines GL1 to GLp, any one of the data lines DL1 to DLq, and any one of the sensing lines SL1 to SLq. Each of the pixels P may include an organic light emitting diode (OLED) and a pixel driver PD supplying current to the organic light emitting diode (OLED) as shown in FIG. 2 . In FIG. 2 , for convenience of explanation, a jth (j is a positive integer satisfying 1≤≤j≤≤q) data line DLj, a jth sensing line SLj, and kth (k is 1≤≤k) Only the pixel P connected to the scan line Sk and the kth sensing signal line SSk (a positive integer satisfying ≤ ≤ p) is illustrated. The k-th scan line Sk and the k-th sensing signal line SSk are included in the k-th gate line GLk.

Referring to FIG. 2 , the pixel P includes an organic light emitting diode OLED and a pixel driver PD supplying current to the organic light emitting diode OLED and the j-th sensing line SLj.

The organic light emitting diode OLED emits light according to a current supplied through the driving transistor DT. The anode electrode of the organic light emitting diode OLED may be connected to the source electrode of the driving transistor DT, and the cathode electrode may be connected to the low potential voltage line ELVSSL to which a low potential power voltage lower than the high potential power voltage is supplied. .

An 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 an organic light emitting diode (OLED), when a voltage is applied to an anode electrode and a cathode electrode, holes and electrons move to the organic light emitting layer through the hole transport layer and the electron transport layer, respectively, and the holes and electrons are combined with each other in the organic light emitting layer to emit light.

The pixel driver PD is driven by the driving transistor DT, the first transistor ST1 controlled by the scan signal of the k-th scan line Sk, and the sensing signal of the k-th sensing signal line SSk. A controlled second transistor ST2 and a capacitor C may be included. When a scan signal is supplied from the k-th scan line Sk connected to the pixel P in the display mode, the pixel driver PD generates a data voltage VDATA of the j-th data line DLj connected to the pixel P. is supplied, and a current of the driving transistor DT according to the data voltage VDATA is supplied to the organic light emitting diode OLED. The pixel driver PD receives the sensing voltage of the j-th data line DLj connected to the pixel P when a scan signal is supplied from the k-th scan line Sk connected to the pixel P in the sensing mode , the current of the driving transistor DT flows to the j-th sensing line SLj connected to the pixel P.

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 a current flowing from the high potential voltage line ELVDDL to the organic light emitting diode OLED according to a 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 is connected to the anode electrode of the organic light emitting diode (OLED), and the drain electrode is a high voltage source to which a high potential power voltage is supplied. It may be connected to the upper voltage line ELVDDL.

The first transistor ST1 is turned on by the k-th scan signal of the k-th scan line Sk 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 T1 is connected to the k-th scan line Sk, the first electrode is connected to the gate electrode of the driving transistor DT, and the second electrode is connected to the j-th data line DLj. can be The first transistor ST1 may be collectively referred to as a scan transistor.

The second transistor ST2 is turned on by the k-th sensing signal of the k-th sensing signal line SSk to connect the j-th sensing line SLj to the source electrode of the driving transistor DT. The gate electrode of the second transistor ST2 is connected to the k-th sensing signal line SSk, the first electrode is connected to the j-th sensing line SLj, and the second electrode is connected to the source electrode of the driving transistor DT. can be connected. The second transistor ST2 may be collectively 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 a difference voltage between the gate voltage and the source voltage of the driving transistor DT.

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

In the display mode, when a scan signal is supplied to the k-th scan line Sk, the data voltage VDATA of the j-th data line DLj is supplied to the gate electrode of the driving transistor DT, and the k-th sensing signal line ( When the sensing signal is supplied to SSk), the initialization voltage of the j-th sensing line SLj is supplied to the source electrode of the driving transistor DT. Accordingly, in the display mode, the current of the driving transistor DT flowing according to the voltage difference between the voltage of the gate electrode and the voltage of the source electrode of the driving transistor DT is supplied to the organic light emitting diode OLED, and the organic light emitting diode OLED ) emits light according to the current of the driving transistor DT. In this case, since the data voltage VDATA is a voltage that compensates 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 electron mobility of the driving transistor DT. .

In the sensing mode, when a scan signal is supplied to the k-th scan line Sk, the sensing voltage of the j-th data line DLj is supplied to the gate electrode of the driving transistor DT, and is applied to the k-th sensing signal line SSk. When the sensing signal is supplied, the initialization voltage of the j-th sensing line SLj is supplied to the source electrode of the driving transistor DT. Also, when a sensing signal is supplied to the k-th sensing signal line SSk, the second transistor ST2 is turned on and the driving transistor DT flows according to a voltage difference between the gate electrode voltage and the source electrode voltage. The current of the transistor DT flows to the j-th sensing line SLj.

The gate driver 110 receives the gate driver control signal GCS from the timing controller 130 , generates gate signals according to the gate driver control signal GCS and supplies them to the gate lines GL1 to GLp.

The data driver 120 receives the data driver control signal DCS from the timing controller 130 , generates data voltages according to the data driver control signal DCS, and supplies them to the data lines DL1 to DLq. In addition, the data driver 120 senses the voltage and current characteristics of each of the pixels P to generate the sensing data SEN and supply it to the timing controller 130 .

The timing controller 130 receives from the outside a timing signal TS for controlling the display timing of an image and digital video data DATA including color-specific information for realizing an image. The timing signal TS and digital video data DATA are input to the input terminal of the timing controller 130 according to a set protocol. Also, the timing controller 130 receives sensing data SEN according to voltage and current characteristics of each of the pixels P from the data driver 120 .

The timing signal TS includes a vertical sync signal (Vsync), a horizontal sync signal (Hsync), a data enable signal (DE), and a dot clock (DCLK). include The timing controller 130 compensates the digital video data DATA based on the sensed data SEN.

The timing controller 130 generates driver control signals for controlling operation timings of the gate driver 110 , the data driver 120 , the scan driver, and the sensing driver. The driver control signals are the gate driver control signal GCS for controlling the operation timing of the gate driver 110 , the data driver control signal DCS for controlling the operation timing of the data driver 120 , and the operation timing of the scan driver and a scan driver control signal for controlling the sensing driver and a sensing driver control signal for controlling an operation timing of the sensing driver.

The timing controller 130 operates the data driver 120 , the scan driver, and the sensing driver in any one of a display mode and a sensing mode according to a mode signal. The display mode is a mode in which the pixels P of the display panel 100 display an image, and the sensing mode is a mode in which the current or voltage of the driving transistor DT of each of the pixels P of the display panel 100 is sensed. to be. When the waveform of the scan signal supplied to each of the pixels P and the waveform of the sensing signal are changed in each of the display mode and the sensing mode, the data driver control signal DCS, the scan driver control signal and The sensing driver control signal may also be changed. Accordingly, the timing controller 130 generates the data driver control signal DCS, the scan driver control signal, and the sensing driver control signal corresponding to the corresponding mode according to which mode is the display mode and the sensing mode.

The timing controller 130 outputs the gate driver control signal GCS to the gate driver 110 . The timing controller 130 outputs the compensated digital video data and the data driver control signal DCS to the data driver 120 . The timing controller 130 outputs the scan driver control signal to the scan driver. The timing controller 130 outputs the sensing driver control signal to the sensing driver.

Also, the timing controller 130 generates a mode signal for driving the data driver 120 , the scan driver, and the sensing driver according to which mode of the display mode and the sensing mode is driven. The timing controller 130 operates the data driver 120 , the scan driver, and the sensing driver in any one of a display mode and a sensing mode according to a mode signal.

3 is a block diagram of an organic light emitting display device according to an example of the present application. The organic light emitting display device according to an example of the present application includes a display panel 100 , a driver-IC (IC) 300 , and a lighting test switch element unit 400 . In addition, the organic light emitting display device according to an example of the present application may optionally further include the DEMUX unit 200 .

The display panel 100 includes a display area in which pixels displaying an image are provided, and a non-display area NDA disposed outside the display area and not displaying an image.

The driver IC 300 is disposed on the non-display area NDA to drive the display panel 100 . The driver IC 300 according to an example of the present application may have all the functions of the gate driver 110 , the data driver 120 , and the timing controller 130 in one chip. Accordingly, the organic light emitting display device to which the driver IC 300 according to an example of the present application is applied may be applied to a small electronic device such as a portable terminal and a smart watch.

The lighting test switch element unit 400 receives the lighting test signal APS for performing the lighting test (Auto Probe, A/P) from the external lighting test pad unit 500 . The lighting test signal APS is a signal capable of checking whether each of the pixels P is normally driven. The lighting test pad unit 500 is a pad that is provided in the lighting test device and outputs the lighting test signal APS to the lighting test switch element unit 400 .

The lighting test switch element unit 400 applies the lighting test signal APS to each of the red sub-pixels RSP, the green sub-pixels GSP, and the blue sub-pixels BSP constituting the pixels P. .

For example, the lighting test switch element unit 400 according to an example of the present application is disposed in a portion of the non-display area NDA in which the driver IC 300 is disposed, and is disposed outside the driver IC 300 . As shown in FIG. 3 , when the driver IC 300 is disposed in the non-display area NDA provided in the upper direction of the display panel 100 , the lighting test switch element 400 is disposed in the upper direction of the display panel 100 . It is disposed in a portion of the non-display area NDA provided in , and disposed outside the driver IC 300 .

In addition, the lighting test switch element unit 400 may be disposed in a portion where the driver IC 300 is not disposed. For example, when the driver IC 300 is disposed in the non-display area NDA provided in the upper direction of the display panel 100 , the lighting test switch element unit 400 is disposed in the lower direction of the display panel 100 . It is disposed in the provided non-display area NDA. In this case, a problem occurs in that the width of the non-display area NDA provided in the lower direction of the display panel 100 increases.

Also, even when the lighting test switch element part 400 is disposed in the non-display area NDA where the driver IC 300 is disposed, it is disposed inside the driver IC 300 . For example, the lighting test switch element unit 400 is disposed between the display panel 100 and the driver IC 300 in the non-display area NDA. In this case, a problem occurs in that the width of the non-display area NDA in the portion where the driver IC 300 is disposed increases.

The lighting test switch element unit 400 according to an example of the present application may be disposed outside the driver IC 300 to prevent an increase in the width of the non-display area NDA. In addition, in order to protect the driver IC 300 from external impact, the non-display area NDA should be formed to some extent outside the portion where the driver IC 300 is disposed. When the lighting inspection switch element part 400 is positioned on the non-display area NDA, the lighting test switch element part 400 may be disposed without increasing the width of the non-display area NDA.

In addition, the lighting test switch element unit 400 is used only during the process of performing the lighting test in the manufacturing process of the organic light emitting display device, and is not used when displaying an image. Therefore, it is not necessary to increase the width of the non-display area NDA in order to protect the lighting test switch element unit 400 . Accordingly, in the organic light emitting display device according to an example of the present application, a non-display area (NDA) that does not display an image, that is, a non-display area excluding the display area among the entire surface area outside the display area where pixels displaying an image are located. An increase in the width of the display area NDA may be prevented. The organic light emitting display device according to an example of the present application includes a non-display area (NDA) viewed from the front, that is, a bezel area, which is an area excluding an area bent or bent to the rear or side of the non-display area (NDA). Since it can be minimized, an organic light emitting diode display having a narrow bezel can be easily implemented.

In addition, the lighting test switch element unit 400 of the organic light emitting diode display according to an example of the present application may apply the lighting test signal APS to the driver IC 300 . Accordingly, the lighting test signal APS may be applied via the driver IC 300 without directly applying to the display panel 100 .

When the lighting inspection signal APS is directly applied to the display panel 100 , the presence or absence of an abnormality in the pixels of the display panel 100 may be inspected, but the presence or absence of an abnormality in the driver IC 300 may not be inspected. Accordingly, there is a problem in that the organic light emitting display device cannot be used due to a defect in the driver IC 300 after the production of the organic light emitting display device is completed.

The lighting test switch element unit 400 of the organic light emitting display device according to an example of the present application applies the lighting test signal APS to the driver IC 300 and uses the lighting test signal APS to the driver IC 300 . The presence or absence of abnormality can be checked during the manufacturing process. Accordingly, unnecessary manufacturing costs due to driver IC failure can be reduced.

As described above, the organic light emitting display device according to an example of the present application includes a display panel 100 , a driver-IC (IC) 300 , and a lighting test switch element unit 400 , and optionally a DEMUX unit. (200) may be further included.

The DEMUX unit 200 receives a driving signal from the driver IC 300 and supplies the driving signal to each of the red sub-pixels RSP, the green sub-pixels GSP, and the blue sub-pixels BSP. That is, the DEMUX unit 200 demultiplexes the driving signal.

When the DEMUX unit 200 is provided, all of the RGB sub-pixels may be driven using one driving signal. That is, digital video data for each RGB color may be transmitted using one driving signal but time division driving. Accordingly, it is possible to reduce the number of driving signals, thereby facilitating miniaturization and integration of the driver IC 300 .

The DEMUX unit 200 according to an example of the present application is provided inside a portion of the non-display area NDA where the driver IC 300 and the lighting test switch element unit 400 are disposed. As shown in FIG. 3 , when the driver IC 300 and the lighting test switch element unit 400 are formed in the upper non-display area NDA, the DEMUX unit 200 is the display panel 100 in the upper non-display area NDA. ) and the driver IC 300 . The DEMUX unit 200 receives a driving signal from the driver IC 300 , demultiplexes it, and supplies it to the display panel 100 , so it should be disposed between the display panel 100 and the driver IC 300 to electrically connect the IC chips. It is possible to reduce the length of the wiring connected to

4 is a block diagram of an organic light emitting display device according to another example of the present application. The organic light emitting display device according to another example of the present application includes a display panel 100 , a driver-IC (IC) 300 , and a lighting test switch element unit 400 . In addition, the organic light emitting display device according to an example of the present application may optionally further include a DEMUX unit 200 and an antistatic unit 600 .

The display panel 100 includes a display area in which pixels displaying an image are provided, and a non-display area NDA disposed outside the display area and not displaying an image.

The driver IC 300 is disposed outside the non-display area NDA to drive the display panel 100 . The driver IC 300 according to an example of the present application may implement the functions of the gate driver 110 , the data driver 120 , and the timing controller 130 in one chip. Accordingly, the organic light emitting display device to which the driver IC 300 according to an example of the present application is applied may be applied to a small electronic device such as a portable terminal and a smart watch.

In order to dispose the driver IC 300 outside the non-display area NDA, the driver IC 300 according to another example of the present application is disposed on the rear surface of the organic light emitting diode display. To this end, a portion of the non-display area NDA on which the driver IC 300 is disposed is folded and bent toward the rear surface of the display area. In FIG. 4 , the portion where the driver IC 300 is located is a portion that is folded toward the rear side of the display panel 100 and may be folded toward the rear side with respect to the bending line BL.

When the driver IC 300 is folded toward the rear surface of the display panel 100 , the area of the non-display area NDA is reduced by the area the driver IC 300 occupies in the non-display area NDA. Accordingly, the width of the non-display area NDA may be further reduced, and thus an organic light emitting diode display having a thinner edge area may be realized.

The lighting test switch element unit 400 receives the lighting test signal APS for performing the lighting test (Auto Probe, A/P) from the lighting test pad unit 500 . The lighting test signal APS is a signal capable of checking whether each of the pixels P is normally driven, and the lighting test signal APS is applied to the data line DL connected to the pixels P. The lighting test pad unit 500 is a pad that is provided in the lighting test device and outputs the lighting test signal APS to the lighting test switch element unit 400 . The lighting test pad unit 500 is connected only in the manufacturing stage of the organic light emitting diode display, and is cut and removed along the trimming line TR through a cutting process after the organic light emitting display is completed.

The lighting test switch element unit 400 applies the lighting test signal APS to each of the red sub-pixels RSP, the green sub-pixels GSP, and the blue sub-pixels BSP constituting the pixels P. .

The lighting test switch element unit 400 according to another example of the present application is disposed outside the non-display area NDA where the driver IC 300 is disposed, and disposed on the rear surface of the display panel 100 . As shown in FIG. 4 , the lighting test switch element part 400 is disposed outside the bending line BL of the display panel 100 .

In addition, the lighting test switch element unit 400 may be disposed in a portion of the non-display area NDA where the driver IC 300 is not disposed. Alternatively, the lighting test switch element unit 400 may be disposed inside the bending line BL even when the driver IC 300 is disposed in the non-display area NDA. For example, the lighting test switch element unit 400 is disposed on the non-display area NDA. In this case, a problem occurs in that the width of the non-display area NDA increases as much as the area occupied by the lighting test switch element unit 400 .

The lighting test switch element unit 400 according to another example of the present application is disposed on the outside of the bending line BL and disposed on the rear surface of the display panel 100 to prevent the width of the non-display area NDA from increasing. can do. Accordingly, the organic light emitting display device according to an example of the present application can more easily implement the organic light emitting display device having a narrow bezel.

As described above, the organic light emitting display device according to an example of the present application includes a display panel 100 , a driver-IC (IC) 300 , and a lighting test switch element unit 400 , and optionally a DEMUX unit. 200 and an antistatic unit 600 may be further included.

The DEMUX unit 200 receives a driving signal from the driver IC 300 and supplies the driving signal to each of the red sub-pixels RSP, the green sub-pixels GSP, and the blue sub-pixels BSP. Accordingly, the DEMUX unit 200 demultiplexes the driving signal.

When the DEMUX unit 200 is provided, all of the RGB sub-pixels may be driven using one driving signal. That is, digital video data for each RGB color may be transmitted using one driving signal but time division driving. Accordingly, it is possible to reduce the number of driving signals, thereby facilitating miniaturization and integration of the driver IC 300 .

The antistatic unit 600 is disposed outside the DEMUX unit 200 in the non-display area NDA. The static electricity prevention unit 600 prevents static electricity generated from the outside of the display device from being transmitted to the driver IC 300 or the display panel 100 . When the static electricity prevention unit 600 is included, it is possible to prevent static electricity from damaging the driver IC 300 even when the driver IC 300 is bent.

5 is a circuit diagram illustrating driving of the DEMUX unit 200 of an organic light emitting display device according to an example of the present application.

In the organic light emitting display device according to an example of the present application, a single RGB digital video data DATA_RGB including RGB image information and a data enable signal DATA_EN controlling whether RGB digital video data DATA_RGB are output. includes The data enable signal DATA_EN is provided to the lighting test switch element unit 400 through a data enable line separately from the data line DL. In this case, during the lighting test, the lighting test switch element unit 400 receives a signal through the lighting test pad part 500 by connecting the data enable wiring to the lighting test pad part 500 .

The lighting check switch is turned on by the data enable signal DATA_EN to output RGB digital video data DATA_RGB. The lighting test pad unit 500 is connected to the lighting test switch element unit 400 , and the lighting test switch element unit 400 is provided with a lighting test switch. In addition, the source electrode or drain electrode of the lighting test switch and the lighting test routing wiring are connected. Accordingly, during the lighting test, the RGB digital video data DATA_RGB is supplied to the source electrode or the drain electrode of the lighting test switch. That is, during the lighting test, RGB digital video data DATA_RGB is generated by an external lighting test device connected to the lighting test pad unit 500 and supplied to each pixel through the lighting test switch.

The DEMUX unit 200 includes a red sub-pixel DEMUX unit 200R, a green sub-pixel DEMUX unit 200G, and a blue sub-pixel DEMUX unit 200B.

The red sub-pixel DEMUX unit 200R turns on the switching element at the timing to supply R digital video data to the red sub-pixel RSP, and the first resistor R1 and the first capacitor C1 The R digital video data voltage whose size and waveform are adjusted by the load unit is supplied to the red sub-pixels RSP.

The green sub-pixel DEMUX unit 200G turns on the switching element at the timing to supply G digital video data to the green sub-pixel GSP, and the second resistor R2 and the second capacitor C2 A G digital video data voltage whose size and waveform are adjusted by the load unit is supplied to the green sub-pixels GSP.

The blue sub-pixel DEMUX unit 200B turns on the switching element at the timing to supply the B digital video data to the blue sub-pixel BSP, so that the third resistor R3 and the third capacitor C3 are formed. The B digital video data voltage whose size and waveform are adjusted by the load unit is supplied to the blue sub-pixels BSP.

6 is a waveform diagram illustrating driving of an organic light emitting display device according to an example of the present application.

During the lighting test period AP, the data enable signal DATA_EN maintains a high logic level H state. The switching transistors turned on by the data enable signal DATA_EN supply signals flowing on the RGB data line to the pixels. In the lighting test period AP, the lighting test signal flows along the RGB data line. Accordingly, the lighting test signal can be supplied to the pixels using a single RGB data line. At this time, the DEMUX unit 200 demultiplexes the lighting test signal for each color and supplies it to each sub-pixel. Accordingly, the lighting check of the RGB sub-pixels may be collectively performed using the lighting check signal.

During the module driving period MODULE, the data enable signal DATA_EN maintains a low logic level L state. The switching transistors are turned off and cannot be electrically connected to the RGB data line. The RGB digital video data DATA_RGB is supplied to the pixels from the driver IC source 300S. Since the supplied RGB digital video data DATA_RGB is supplied to the sub-pixels corresponding to each color by the DEMUX unit 200 , the organic light emitting diode display may be module driven while displaying an image. At this time, as described with reference to FIG. 5 , the DEMUX unit 200 demultiplexes the RGB digital video data DATA_RGB for each color and supplies it to each sub-pixel. Accordingly, it is possible to express RGB colors while performing time division driving using one RGB digital video data DATA_RGB.

7 is a plan view illustrating an organic light emitting display device according to another example of the present application.

According to another example of the present application, an organic light emitting display device includes a display panel 100 and a driver IC 300 .

The display panel 100 includes a display area in which pixels displaying an image are provided, and a non-display area NDA disposed outside the display area and not displaying an image.

The driver IC 300 is disposed on the non-display area NDA to drive the display panel 100 .

In addition, the driver IC 300 according to another example of the present application does not pass the lighting test signal APS for performing the lighting test from the external lighting test pad unit 500 via the lighting test switch element unit 400 . input without In the central portion of the organic light emitting display device, the lighting test signal APS is applied via the lighting test switch element unit 400, but as shown in FIG. 7, at the edge of the organic light emitting display device, the lighting test switch element unit ( 400 , the lighting test signal APS may be directly applied from the lighting test pad unit 500 to the drive IC 300 through the lighting test routing wire APRL.

In the case of such a design, the lighting test can be performed even if the lighting test switch element part 400 of the organic light emitting display device that has undergone the manufacturing process is damaged or the lighting test switch element part 400 cannot be used in the finished product. There are advantages that can be

In addition, the driver IC 300 according to another example of the present application supplies the lighting test signal APS to the bending area BE through the driving routing line DRL.

The bending area BE is an area folded toward the rear of the non-display area of the organic light emitting diode display. That is, in another example of the present application, the portion on which the driver IC 300 is disposed is folded and bent toward the rear surface of the display area. Accordingly, the non-display area corresponding to the area in which the driver IC 300 is disposed is not viewed, thereby facilitating the implementation of the narrow bezel.

In addition, the lighting test switch element part 400 of the organic light emitting diode display according to another example of the present application is disposed outside the driver IC 300 , and is removed when the lighting test pad part 500 is removed during trimming. .

For example, trimming to remove the lighting test pad part 500 is performed along the trimming line TR. In this case, only the lighting test pad part 500 is removed, and the lighting test switch element part 400 remains in the finished product.

As another example, when trimming, the lighting inspection switch element part 400 is removed by cutting along the cutting line CL, which is a portion inside the first width W1 than the trimming line TR. In this case, the lighting test switch element part 400 may be removed by cutting to pass through the lighting test switch element part 400 as shown in FIG. 7 , or the inside of the lighting test switch element part 400 may be cut.

Accordingly, the lighting test switch element unit 400 used only in the lighting test process in the completed organic light emitting display device can be removed. Accordingly, an unnecessary portion in terms of driving of the organic light emitting diode display may be removed and the width of the non-display area may be reduced.

During the trimming process of cutting and removing the portion where the lighting test pad part 500 is formed, the lighting test switch element part 400 may remain in the finished product or may be removed. A line between the lighting test pad part 500 and the lighting test switch element part 400, for example, cut along the outer line of the lighting test switch element part 400 so that the lighting test switch element part 400 remains can do. When the lighting test switch element part 400 is cut along the outer line of the lighting test switch element part 400 so that it remains, it is possible to prevent defects between wirings that may occur during cutting.

In addition, as described above, it may be cut so as to pass through the lighting test switch element unit 400 . Alternatively, the lighting test switch element part 400 may be completely removed by cutting a line formed inside the lighting test switch element part 400 . When the lighting test switch element part 400 is cut to pass through the lighting test switch element part 400 to be removed, or the inside of the lighting test switch element part 400 is cut, the lighting test switch element part 400 in the final finished product ) can be eliminated. Accordingly, it is possible to provide a display device having a slim design by further reducing the thickness of the bezel.

8 is a plan view of an organic light emitting display device according to examples of the present application implemented as a smart watch.

The smart watch implemented according to the examples of the present application has a display area for displaying an image in the center part, and pixels for displaying an image are formed in the display area. In FIG. 8, only one pixel among them is expressed in detail. In addition, in FIG. 8 , one pixel includes a driving transistor DT, first and second switching transistors ST1 and ST2 , first and second emission control transistors EMT1 and EMT2 , an initialization transistor INIT, and a storage capacitor. (Cst), and a case composed of an organic light emitting diode (OLED) is shown. And, the present invention is not limited thereto, and the pixel according to an example of the present application may be implemented in other ways.

The DEMUX unit 200 is disposed at a corner of the display area. The driver IC 300 is disposed in a portion protruding out of the non-display area. The portion protruding outward may be bent and disposed on the rear surface of the display area. The lighting test switch element unit 400 is disposed outside the driver IC 300 . The antistatic unit 600 is disposed between the DEMUX unit 200 and the driver IC 300 . The functions of the DEMUX unit 200 , the driver IC 300 , the lighting test switch element unit 400 , and the static electricity prevention unit 600 are the same as those described in connection with FIGS. 3 and 4 , and thus may be briefly described or omitted. There is. For the lighting test, the lighting test routing wiring APRL connects the lighting test switch element unit 400 and the driver IC 300 . Specifically, the lighting test routing wire (APRL) is connected to the output terminal of the driver IC. The data line DL connected to the driver IC 300 extends past the lower portions of the antistatic unit 600 and the DEMUX unit 200 and is then disposed on the display area. In order to provide the RGB digital video data DATA_RGB signal for each display pixel, the data line DL is connected to the DEMUX unit 200 to apply the RGB digital video data DATA_RGB to the DEMUX unit 200 . In this case, the RGB digital video data DATA_RGB may be the lighting test signal APS provided through the lighting test pad unit 500 . The data line DL extending from the DEMUX unit 200 and disposed on the display area is connected to the second switching transistor ST2 to supply the data voltage VDATA to the driving transistor DT.

The first power line 700 extends from the driver IC 300 and passes through the driver IC 300 and the lower portion of the antistatic unit 600 , and then is uniformly disposed on one surface of the display area. Also, it extends from the edge of the display area and extends past the lower portion of the DEMUX unit 200 and is then disposed on the display area. The first power line 700 disposed on the display area is connected to the second emission control transistor EMT2 to supply the high potential power voltage VDD to the second emission control transistor EMT2 .

The second power line 800 extends from the driver IC 300 and is disposed to surround the edge of the display area. The second power line 800 is connected to the cathode electrode of the organic light emitting diode (OLED). The second power line 800 supplies the low potential power voltage VSS.

The first emission control line 910 is formed at the left edge of the display area. The first emission control line 910 controls whether the first emission control transistor EMT1 is turned on.

The second emission control line 920 is formed at the right edge of the display area. The second light emission control line 920 controls whether the second light emission control transistor EMT2 is turned on.

The first scan line 930 is formed at the left edge of the display area. The first scan line 930 controls whether the first switching transistor ST1 is turned on.

The second scan line 940 is formed at the right edge of the display area. The second scan line 940 controls whether the second switching transistor ST2 is turned on.

The data line DL supplies a data voltage to the source electrode of the second switching transistor ST2 so that the driving transistor DT can receive the data voltage.

The initialization line INIL supplies an initialization voltage to the source electrode of the initialization transistor INIT so that the initialization transistor INIT can supply the initialization voltage to the anode electrode of the organic light emitting diode OLED.

9 is a driving waveform simulation graph of the organic light emitting display device according to the present application. 10 is a graph showing the relationship between the width of a transistor for each RGB color of the organic light emitting diode display according to the present application and the corresponding current of the organic light emitting diode.

As shown in FIG. 9 , in the organic light emitting display device according to the present application, RGB digital video data DATA_RGB is time-divided by using the DEMUX unit 200 to generate RGB data voltages. In addition, it can be seen that although the voltage ripple (RIPPLE) phenomenon is partially recognized at the start of driving in each sub-pixel, there is no abnormality in driving.

And, as shown in FIG. 10 , in the organic light emitting diode display according to the present application, as the width of the transistor increases, the reduction ratio of the current flowing through the organic light emitting diode decreases, so that an ideal current can flow. However, even when the width of the transistor is reduced to 10 μm, the reduction ratio of the current is 6% or less, so it can be seen that there is no problem in the integration of the transistor. In this case, the width of the transistor may be the width of the channel.

Therefore, through FIGS. 9 and 10 , even when the lighting test switch element part 400 is disposed outside the drive IC 300 , there is no problem in driving the organic light emitting diode. In addition, in the organic light emitting display device according to the present application, the width of the bezel may be reduced by providing a lighting test switch element or removing it so that it does not remain in the finished product.

The organic light emitting display device according to the embodiment of the present application may be described as follows.

In the display panel according to an example of the present application, the organic light emitting display device includes a display panel having a display area in which pixels displaying an image are located, a non-display area in which an image is not displayed outside the display area, and the non-display area. and a driver IC for driving the display panel, and a lighting test switch element part disposed in a non-display area and disposed outside the driver IC, and a lighting test pad part for inputting a lighting test signal to the lighting test switch element part, , the lighting test switch element may reduce the width of the bezel of the organic light emitting diode display by applying the lighting test signal to the pixels.

The lighting test switch element unit may apply a lighting test signal to the driver IC.

The pixels may include red sub-pixels, green sub-pixels, and blue sub-pixels, and may further include a DEMUX unit disposed closer to the display panel than the lighting test switch element unit.

The DEMUX unit may convert the lighting inspection signal into a red sub-pixel inspection signal for inspecting red sub-pixels, a green sub-pixel inspection signal for inspecting green sub-pixels, and a blue sub-pixel inspection signal for inspecting blue sub-pixels .

A portion of the non-display area on which the driver IC is disposed may be folded and bent toward the rear surface of the display area.

The driver IC may be disposed on the rear surface of the display panel.

The lighting test switch element part may be disposed on the rear surface of the display panel.

An organic light emitting display device according to another example of the present application includes a display area in which pixels displaying an image are located, a display panel that is outside the display area and has a non-display area that does not display an image, and is disposed in the non-display area for display and a driver IC for driving the panel, and a lighting test switch element unit for lighting inspection of pixels and a lighting test pad unit for inputting a lighting test signal to the lighting test switch element unit. The driver IC according to another example of the present application receives the lighting test signal from the lighting test pad unit without passing through the lighting test switch element unit, and the area in which the driver IC is disposed is folded and bent toward the rear surface of the display area, so that the The width of the bezel can be reduced.

The lighting test switch element part is disposed outside the driver IC, and may be removed during trimming to remove the lighting test pad part after the lighting test.

The lighting test switch element part may be removed along a line passing through the lighting test switch element part, or may be removed along a line inside the lighting test switch element part.

The lighting test switch element unit may include a lighting test switch that is turned on by a data enable signal provided through a data enable line.

An organic light emitting display device according to another example of the present application includes a display panel having a display area including pixels and a non-display area outside the display area, a driver IC disposed in the non-display area to drive the display panel, and a drive and a lighting test routing line extending from the outside of the IC toward the display area and connected to a data line supplying a data voltage to the pixels, wherein the lighting test routing wire provides a lighting test signal to the pixels during the lighting test. Accordingly, the width of the bezel of the organic light emitting diode display may be reduced.

The pixels are composed of sub-pixels including a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the organic light emitting display device further includes a DEMUX unit for supplying a data voltage to each sub-pixel, and the lighting check routing wiring is a driver IC and a DEMUX unit to provide a lighting test signal for each sub-pixel.

The organic light emitting diode display may further include a lighting test signal element connected to a lighting test routing line.

The lighting test signal element unit is turned on by a data enable signal, and the data enable signal may be provided through a data line and a separate data enable line.

Through the above-described content, those skilled in the art will know that various changes and modifications are possible without departing from the technical spirit of the present invention. Accordingly, the technical scope of the present invention should not be limited to the content described in the detailed description of the specification, but should be defined by the claims.

100: display panel 110: gate driver
120: data driver 130: timing controller
200: DEMUX unit 300: driver IC
400: lighting inspection switch element part 500: lighting inspection pad part
600: antistatic unit 700: first power line
800: second power line
910 and 920: first and second light emission control lines
930, 940: first and second scan lines

Claims (16)

A display panel comprising: a display panel having a display area in which pixels displaying an image are located and a non-display area in which an image is not displayed outside the display area;
a driver IC disposed in the non-display area and configured to drive the display panel;
a lighting test switch element disposed in the non-display area, disposed outside the driver IC, and receiving a lighting test signal from the lighting test pad part; and
a DEMUX unit disposed between the driver IC and the display area;
The lighting test switch element unit applies the lighting test signal to the pixels,
the pixels include red sub-pixels, green sub-pixels, and blue sub-pixels;
The DEMUX unit is an organic light emitting display device driven by the driver IC during a lighting test period. The method of claim 1,
The lighting test switch element unit applies the lighting test signal to the driver IC. The method of claim 1,
The pixels include red sub-pixels, green sub-pixels, and blue sub-pixels, and the organic light emitting diode display further includes a DEMUX unit disposed closer to the display panel than the lighting test switch element unit. delete The method of claim 1,
An organic light emitting display device in which a portion of the non-display area where the driver IC is disposed is folded and bent toward a rear surface of the display area. 6. The method of claim 5,
and the driver IC is disposed on a rear surface of the display panel. 6. The method of claim 5,
The lighting test switch element unit is disposed on a rear surface of the display panel. A display panel comprising: a display panel having a display area in which pixels displaying an image are located, and a non-display area outside the display area and not displaying an image;
a driver IC disposed in the non-display area to drive the display panel;
a lighting test switch element part disposed in the non-display area, disposed outside the driver IC, and configured to check the lighting of the pixels;
a DEMUX unit disposed between the driver IC and the display area; and
and a lighting test pad for inputting a lighting test signal to the lighting test switch element,
The driver IC receives the lighting test signal from the lighting test pad unit without passing through the lighting test switch element unit,
the pixels include red sub-pixels, green sub-pixels, and blue sub-pixels;
The DEMUX unit is driven by the driver IC during the lighting test period,
The area in which the driver IC is disposed is folded and bent toward a rear surface of the display area. 9. The method of claim 8,
The lighting test switch element part is disposed outside the driver IC, and is removed during trimming to remove the lighting test pad part after the lighting test. 10. The method of claim 9,
The lighting test switch element part is removed along a line passing through the lighting test switch element part or is removed along a line inside the lighting test switch element part. The method of claim 1,
The lighting test switch element unit includes a lighting test switch that is turned on by a data enable signal provided through a data enable line. a display panel having a display area including pixels and a non-display area outside the display area;
a driver IC disposed in the non-display area to drive the display panel;
a lighting test routing line extending from the outside of the driver IC toward the display area and connected to a data line supplying a data voltage to the pixels; and
a DEMUX unit disposed between the driver IC and the display area;
the pixels include red sub-pixels, green sub-pixels, and blue sub-pixels;
the lighting test routing wiring provides a lighting test signal to the pixels during lighting testing;
The lighting test routing line is connected to the driver IC and the DEMUX unit to provide a lighting test signal for each of the sub-pixels. delete 13. The method of claim 12,
The organic light emitting display device further comprises a lighting test signal element connected to the lighting test routing wiring. 15. The method of claim 14,
The lighting test signal element unit is turned on by a data enable signal, and the data enable signal is provided through a data enable line separate from the data line. The method of claim 1,
The DEUMX portion is an organic light emitting display device that is not folded toward the rear surface of the display panel.

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