LIGHT EMITTING DISPLAY PANEL AND LIGHT EMITTING DISPLAY APPARATUS USING THE SAME

A light emitting display panel includes a substrate including a non-display area and a display area with pixels, a driving light-shielding electrode on the substrate, a buffer covering the driving light-shielding electrode, a pixel driving circuit layer in the buffer, including a driving transistor connected with the driving light-shielding electrode, a planarization layer covering the pixel driving circuit layer, an anode in the planarization layer and connected with the driving light-shielding electrode and the driving transistor, a repair line in the planarization layer, a bank covering an outer portion of the anode to form an opening area from which the anode is exposed, a light emitting layer on the anode and the bank, and a cathode on the light emitting layer, wherein the repair line is connected with an island-shaped contact electrode below the repair line, and at least one insulating layer is below the contact electrode.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of the Korean Patent Application No. 10-2020-0188160 filed on Dec. 30, 2020, which are hereby incorporated by reference as if fully set forth herein.

BACKGROUND

Technical Field

The present disclosure relates to a light emitting display panel and a light emitting display apparatus using the same.

Discussion of the Related Art

A light emitting display apparatus is a display apparatus for outputting light by using a light emitting element, and includes a light emitting display panel provided with light emitting elements.

In a process of manufacturing a light emitting display panel, a characteristic deterioration or an internal short of a thin film transistor may occur, whereby a pixel may not be driven normally. In order to drive a light emitting element provided in a defective pixel that is not normally driven, a repair line may be provided in the light emitting display panel. The repair line serves to connect a driving transistor provided in a normal pixel with the light emitting element provided in the defective pixel.

However, in the light emitting display panel of the related art in which contact holes are formed by etching of a planarization layer, a pixel driving circuit layer and a buffer, a driving light-shielding electrode provided below the buffer is exposed through a repair contact hole even in a state that a repair process is not performed. Therefore, the repair process through the repair line cannot be performed normally.

SUMMARY

Accordingly, embodiments of the present disclosure are directed to a light emitting display panel and a light emitting display apparatus using the same that substantially obviate one or more of the problems due to limitations and disadvantages of the related art.

An aspect of the present disclosure is to provide a light emitting display panel and a light emitting display apparatus in which an island type contact electrode is provided below a repair line provided between normal pixels.

To achieve these and other aspects of the inventive concepts, as embodied and broadly described herein, a light emitting display panel comprises a substrate including a non-display area and a display area provided with pixels, a driving light-shielding electrode provided on the substrate in the form of a pattern, a buffer covering the driving light-shielding electrode, a pixel driving circuit layer provided in the buffer, including a driving transistor connected with the driving light-shielding electrode, a planarization layer covering the pixel driving circuit layer, an anode provided in the planarization layer and connected with the driving light-shielding electrode and the driving transistor, a repair line provided in the planarization layer, a bank covering an outer portion of the anode to form an opening area from which the anode is exposed, a light emitting layer provided on the anode and the bank, and a cathode provided on the light emitting layer, wherein the repair line is connected with an island-shaped contact electrode provided below the repair line, and at least one insulating layer is provided below the contact electrode.

In another aspect, a light emitting display apparatus comprises the above light emitting display panel, a data driver for supplying data voltages to data lines provided in the light emitting display panel, a gate driver for supplying gate voltages to gate lines provided in the light emitting display panel, and a controller for controlling the data driver and the gate driver.

DETAILED DESCRIPTION

In the drawings, the same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.

In describing a position relationship, for example, when the position relationship is described as ‘upon˜’, ‘above˜’, ‘below˜’ and ‘next to˜’, one or more portions may be arranged between two other portions unless ‘just’ or ‘direct’ is used.

It should be understood that the term “at least one” includes all combinations related with any one item. For example, “at least one among a first element, a second element and a third element” may include all combinations of two or more elements selected from the first, second and third elements as well as each element of the first, second and third elements.

FIG. 1is an exemplary view illustrating a structure of a light emitting display apparatus according to the present disclosure, andFIG. 2is an exemplary view illustrating a structure of a pixel applied to a light emitting display apparatus according to the present disclosure.

The light emitting display apparatus according to the present disclosure may constitute various electronic devices. The electronic device may be, for example, a smart phone, a tablet PC, a television, a monitor or the like.

As shown inFIG. 1, the light emitting display apparatus according to the present disclosure includes a light emitting display panel100including a display area102, on which an image is output, and a non-display area103provided outside the display area, a gate driver200for supplying a gate signal to gate lines GL1to GLg provided in the display area of the light emitting display panel, a data driver300for supplying data voltages to data lines DL1to DU provided in the light emitting display panel, and a controller400for controlling driving of the gate driver200and the data driver300, wherein ‘g’ and ‘d’ are natural numbers.

First of all, the light emitting display panel100includes a display area102and a non-display area103. The display area102is provided with gate lines GL1to GLg, data lines DL1to DLd, and pixels101.

As shown inFIG. 2, the pixel101provided in the light emitting display panel100may include a light emitting element ED, a switching transistor Tsw1, a storage capacitor Cst, a driving transistor Tdr and a sensing transistor Tsw2. That is, the pixel101may include a pixel driving circuit PDC and a light emitting unit, wherein the pixel driving circuit PDC may include a switching transistor Tsw1, a storage capacitor Cst, a driving transistor Tdr and a sensing transistor Tsw2, and the light emitting unit may include a light emitting element ED.

Brightness of light may be controlled in accordance with a magnitude of a current I flowing in the light emitting element ED, the magnitude of the current I flowing in the light emitting element ED may be controlled by the driving transistor Tdr, and the driving transistor Tdr may be controlled by the data voltage Vdata.

The light emitting element ED may include any one of an organic light emitting layer, an inorganic light emitting layer and a quantum dot light emitting layer, or may include a deposited or mixed structure of an organic light emitting layer (or inorganic light emitting layer) and a quantum dot light emitting layer.

Also, the light emitting element ED may emit light corresponding to any one of various colors such as red, green and blue colors, or may emit white light.

The switching transistor Tsw1constituting the pixel driving circuit PDC is turned on or off by a gate signal GS supplied to the gate line GL, and the data voltage Vdata supplied through the data line DL is supplied to the driving transistor Tdr when the switching transistor Tsw1is turned on. A first voltage EVDD is supplied to the driving transistor Tdr and the light emitting element ED through a first voltage supply line PLA, and a second voltage EVSS is supplied to the light emitting element ED through a second voltage supply line PLB. The sensing transistor Tsw2is turned on or off by a sensing control signal SS supplied through a sensing control line SCL, and a sensing line SL may be connected to the sensing transistor Tsw2. A reference voltage Vref may be supplied to the pixel101through the sensing line SL, and a sensing signal related to a characteristic change of the driving transistor Tdr may be transmitted to the sensing line SL through the sensing transistor Tsw2.

The pixel101applied to the present disclosure may be formed in the structure shown inFIG. 2, but the present disclosure is not limited thereto. Therefore, the pixel applied to the present disclosure may be changed in various forms in addition to the structure shown inFIG. 2.

In the light emitting display panel100, pixel areas provided with pixels101are formed, and signal lines for supplying various signals to the pixel driving circuit PDC provided in the pixel101are formed.

For example, in the light emitting display panel that includes the pixel101shown inFIG. 2, signal lines may include a gate line GL, a data line DL, a sensing control line SCL, a first voltage supply line PLA, a second voltage supply line PLB and a sensing line SL.

Next, the data driver300may be provided in a chip-on film attached to the light emitting display panel100, and may also be connected to a main substrate provided with the controller400. In this case, lines for electrically connecting the controller400, the data driver300and the light emitting display panel100may be provided in the chip-on-film. To this end, the lines are electrically connected to pads provided in the main substrate and the light emitting display panel100. The main substrate is electrically connected with an external substrate on which an external system is mounted.

The data driver300may be directly mounted on the light emitting display panel100and then electrically connected with the main substrate.

However, the data driver300may be formed as one integrated circuit together with the controller400. The integrated circuit may be provided in the chip-on film or directly mounted on the light emitting display panel100.

The data driver300may receive a sensing signal related to the characteristic change of the driving transistor Tdr provided in the light emitting display panel from the light emitting display panel100and transmit the sensing signal to the controller400.

Then, the gate driver200may be provided as an integrated circuit and then mounted on the non-display area103, or may directly be embedded in the non-display area103using a gate-in-panel (GIP) scheme. When the gate-in-panel scheme is used, the transistors constituting the gate driver200may be provided in the non-display area103through the same process as that of the transistors provided in the respective pixels101of the display area102.

When a gate pulse generated by the gate driver200is supplied to a gate of the switching transistor Tsw1provided in the pixel101, the switching transistor is turned on, whereby light may be output from the pixel. When a gate-off signal is supplied to the switching transistor Tsw1, the switching transistor Tsw1is turned off, whereby light is not output from the pixel. The gate signal GS supplied to the gate line GL includes a gate pulse and a gate-off signal.

Next, the controller400may include a data aligner for realigning input image data transmitted from an external system using a timing synchronization signal transmitted from the external system and supplying the realigned image data Data to the data driver300, a control signal generator for generating a gate control signal GCS and a data control signal DCS using the timing synchronization signal, an input unit for receiving the timing synchronization signal and the input image data transmitted from the external system and transmitting them to the data aligner and the control signal generator, and an output unit for outputting the image data Data generated from the data aligner and the control signals DCS and GCS generated from the control signal generator to the data driver300or the gate driver200.

The controller400may serve to sense a touch and a touch position by analyzing touch sensing signals received through a touch panel embedded in the light emitting display panel100or attached to the light emitting display panel100.

Finally, the external system serves to drive the controller400and the electronic device. For example, when the electronic device is a smart phone, the external system may receive various kinds of voice information, image information and text information through a wireless communication network and transmit the received image information to the controller400. The image information may be input image data.

Hereinafter, a light emitting display panel having the pixel structure shown inFIG. 2among various types of light emitting display panels will be described as an example of a light emitting display panel according to the present disclosure.

FIGS. 3A to 3Eare cross-sectional views illustrating a method of manufacturing a light emitting display panel according to the present disclosure. Particularly,FIGS. 3A to 3Eillustrate cross-sections taken along line A-A′ shown inFIG. 1. That is,FIGS. 3A to 3Eare exemplary views illustrating cross-sections of a pad portion104provided in a non-display area103and a pixel101provided in a display area102.

The light emitting display panel100according to the present disclosure includes a substrate110including a non-display area103and a display area102provided with pixels101, a driving light-shielding electrode120provided in the substrate in the form of a pattern, a buffer130covering the driving light-shielding electrode120, a pixel driving circuit layer140provided in the buffer130, including a driving transistor Tdr connected with the driving light-shielding electrode120, a planarization layer160covering the pixel driving circuit layer140, an anode171provided in the planarization layer160and connected with the driving light-shielding electrode120and the driving transistor Tdr, a repair line provided in the planarization layer, a bank180forming an opening area OA from which the anode171is exposed, by covering an outer portion of the anode171, a light emitting layer172provided on the anode171and the bank180, and a cathode173provided on the light emitting layer.

First, the substrate110may be a glass substrate or a plastic substrate, and may be formed of various types of films.

The driving light-shielding electrode120may be formed of at least one of various types of metals. The driving light-shielding electrode120is provided to overlap the driving transistor Tdr. The driving light-shielding electrode120may be connected to a first electrode141of the driving transistor Tdr. The driving light-shielding electrode120and the first electrode141may be connected with the anode171through an anode line174.

Each of the pixels101provided in the display area102includes a driving light-shielding electrode120. Therefore, the driving light-shielding electrode120may be provided in the substrate110in the form of a pattern.

The driving light-shielding electrode120may be made of at least one of various metals such as copper (Cu) and molybdenum-titanium alloy (MoTi).

A pad portion104of the non-display area103may be provided with a pad light-shielding electrode121together with the driving light-shielding electrode120.

The pad light-shielding electrode121may be connected to any one of a gate line GL, a data line DL, a sensing line SL, a sensing control line SCL and other various lines provided in the light emitting display panel100.

Next, the buffer130is provided on an entire surface of the display area102to cover the driving light-shielding electrode120. The buffer130may be formed of at least one inorganic layer or at least one organic layer, or may be formed of at least one inorganic layer and at least one organic layer.

Next, the pixel driving circuit layer140including the driving transistor Tdr is provided on an upper end of the buffer130.

The pixel driving circuit layer140is provided with a pixel driving circuit PDC that includes a driving transistor Tdr. As described with reference toFIG. 2, the pixel driving circuit PDC may include a switching transistor Tsw1, a storage capacitor Cst, a driving transistor Tdr and a sensing transistor Tsw2. Therefore, in addition to the driving transistor Tdr, the pixel driving circuit layer140may include a switching transistor Tsw1, a storage capacitor Cst, a driving transistor Tdr and a sensing transistor Tsw2.

The pixel driving circuit layer140may be provided with a data line DL connected with the pixel driving circuit PDC, a gate line GL, a sensing control line SCL, a sensing line SL and a first voltage supply line PLA.

Therefore, the pixel driving circuit layer140may include at least two metal layers and at least two insulating layers for insulating the at least two metal layers.

For example, when the driving transistor Tdr, as shown inFIG. 3E, includes a semiconductor layer143provided on an upper end of the buffer130, a first electrode141provided on one side of the semiconductor layer and connected with the anode171, a second electrode142provided on the other side of the semiconductor layer143, a gate insulating layer144provided on an upper end of the semiconductor layer143, and a gate145provided on an upper end of the gate insulating layer, the pixel driving circuit layer140may include a first metal layer forming the first electrode141and the semiconductor layer143and a second metal layer forming the gate145, and may also include a first insulating layer forming the gate insulating layer144and a second insulating layer forming a passivation layer149covering the driving transistor Tdr on the upper end of the gate145.

Each of the insulating layers may be formed of at least one inorganic layer or at least one organic layer, and may be formed of at least one inorganic layer and at least one organic layer.

Each of the metal layers may be comprised of at least one of various metals such as copper (Cu) and molybdenum-titanium alloy (MoTi), and may include a conductorized semiconductor.

The first electrode141constituting the driving transistor Tdr may include a first active layer141aprovided on the upper end of the buffer130and provided on one side of the semiconductor layer143, and a first conductor layer141bprovided on an upper end of the first active layer141a, and the second electrode142may include a second active layer142aprovided on the upper end of the buffer130and provided on the other side of the semiconductor layer143, and a second conductor layer142bprovided on an upper end of the second active layer142a.

In this case, the first active layer141aconstituting the first electrode141and the second active layer142aconstituting the second electrode142may be a conductorized semiconductor. That is, the first active layer141aand the second active layer142amay be formed by additionally performing an ion implantation process or an ultraviolet irradiation process on a layer formed of the same material as that of the semiconductor layer143.

Next, the planarization layer160is provided on the pixel driving circuit layer140.

For example, the pixel driving circuit layer140may include various types of transistors and signal lines, which form the pixel driving circuit PDC. In this case, various types of transistors and the signal lines may be different from each other in height, and a height of an area which the transistors and the signal lines are provided may be different from that of an area in which the transistors and the signal lines are not provided.

By this height difference, an upper surface formed by transistors and the signal lines is not flat. Therefore, the upper surface of the pixel driving circuit layer140is not flat.

The planarization layer160serves to planarize the upper surface of the pixel driving circuit layer140that is not flat. That is, the planarization layer160is formed to have a height higher than that of the pixel driving circuit layer140, whereby an upper surface of the planarization layer160may form a flat surface.

The planarization layer160may be formed of at least one organic layer, and may be formed of at least one inorganic layer and at least one organic layer.

A color filter150may be provided in an area corresponding to the anode171on an upper end of the passivation layer149constituting the pixel driving circuit layer140. However, in addition to the upper end of the passivation layer149, the color filter150may be provided at various positions. For example, the color filter150may be provided on an upper end of an encapsulation layer that covers the cathode173.

When the color filter150is provided on the upper end of the passivation layer149, the color filter150may be covered by the planarization layer160.

Next, the anode171is provided on an upper end of the planarization layer160. The anode171forms the light emitting element ED.

The anode171is electrically connected with the driving transistor Tdr provided in the pixel driving circuit layer140, and is patterned for each pixel.

The anode171may be one of the two electrodes constituting the light emitting element ED. For example, when the light emitting element ED is an organic light emitting diode, the organic light emitting diode may include a first pixel electrode, a light emitting layer172provided on an upper end of the first pixel electrode, and a second pixel electrode provided on an upper end of the light emitting layer172. The first pixel electrode may be the anode171, and the second pixel electrode may be the cathode173. In this case, the anode171is connected with the first electrode141of the driving transistor Tdr through the anode line174.

That is, the anode171provided on the planarization layer160may electrically be connected with a transistor provided in the pixel driving circuit layer140, particularly the driving transistor Tdr.

The anode171may be formed of a transparent electrode such as indium tin oxide (ITO) or indium zinc oxide (IZO), may be formed of an opaque electrode such as copper (Cu), or may be formed of a transparent electrode and an opaque electrode.

The anode171may include at least one opaque electrode when the light emitting display panel according to the present disclosure uses a top emission method, that is, a method of outputting light in an upper direction of the anode171.

The anode171may include at least one transparent electrode when the light emitting display panel according to the present disclosure uses a bottom emission method, that is, a method of outputting light in a bottom direction of the anode171.

In addition to the anode171, the anode line174for connecting the anode171to the first electrode141of the driving transistor Tdr may be provided on the upper end of the planarization layer160. The anode line174may be provided in a driving contact hole DCH that passes through the planarization layer160, the pixel driving circuit layer140and the buffer130.

A repair line may be provided on the upper end of the planarization layer160. The repair line will be described below with reference toFIGS. 4 to 13E.

A pad electrode175may be formed on the pad portion104on the upper end of the planarization layer160. The pad electrode175may be connected with the pad light-shielding electrode121through a pad hole PH that passes through the planarization layer160, the pixel driving circuit layer140and the buffer130.

The pad formed of the pad light-shielding electrode121and the pad electrode175may be connected with any one of the gate line GL, the data line DL, the sensing line SL, the sensing control line SCL and other various lines provided in the light emitting display panel100.

Next, the bank180covers outer edges of the anode171to form an opening area OA in which light is output from one pixel101.

As shown inFIG. 3E, the bank180is formed to surround an outer portion of the anode171.

That is, the bank180covers ends of the anode171, and may be provided on the entire surface of the substrate110to expose the anode171. However, the bank180may be formed of various patterns that form the opening area OA.

The bank180may prevent light from being overlapped between adjacent pixels.

The bank180may be formed of at least one inorganic layer or at least one organic layer, and may be formed of at least one inorganic layer and at least one organic layer.

Next, the light emitting layer172may be provided on the entire surface of the substrate110to cover the anode171and the bank180.

The light emitting layer172may include any one of an organic light emitting layer, an inorganic light emitting layer and a quantum dot light emitting layer, or may include a deposited or mixed structure of an organic light emitting layer (or inorganic light emitting layer) and a quantum dot light emitting layer.

The light emitting layer172may include a hole injection layer HIL, a hole transport layer HTL, a hole blocking layer HBL, an electron injection layer EIL, an electron transport layer ETL, an electron blocking layer EBL and a charge generation layer CGL.

When the light emitting layer172outputs white light, the light emitting layer172may include a hole injection layer HIL/hole transport layer HTL, a blue organic layer, an electron injection layer EIL/charge generation layer CGL/electron transport layer ETL, a red organic layer, a yellow green organic layer, an electron injection layer EIL/charge generation layer CGL/electron transport layer ETL, a blue organic layer, an electron injection layer EIL/electron transport layer ETL and an organic buffer, which are sequentially deposited on the anode171.

In addition to the layers having the deposited order described as above, the light emitting layer172may be comprised of layers having various deposited orders.

The light emitting layer172may be configured to output light having various colors such as red, green and blue, and may be configured to output white light.

When the light emitting layer172outputs white light, a color filter may be provided below the light emitting layer172or on an upper end of the light emitting layer172.

For example, the color filter may be provided on an upper end of the cathode173, or may be provided on a lower end of the planarization layer160as shown inFIG. 3E.

Next, the cathode173may be provided on the upper end of the light emitting layer172, particularly may be provided on the entire surface of the substrate110in the form of a plate. However, the cathode173may be formed in various shapes having an opening.

The cathode173may be a second pixel electrode of the organic light emitting diode.

When the light emitting display panel100according to the present disclosure uses a top emission method, the cathode173may be formed of a transparent electrode, for example, indium tin oxide (ITO) or indium zinc oxide (IZO).

When the light emitting display panel100according to the present disclosure uses a bottom emission method, the cathode173may be made of at least one of various metals such as copper (Cu) and molybdenum-titanium alloy (MoTi).

Finally, the cathode173is covered by the encapsulation layer.

When the light emitting layer172outputs white light, the cathode173may be covered by the encapsulation layer, a color filter may be provided on a portion corresponding to the anode171of the upper end of the encapsulation layer, and a black matrix may be provided on a portion corresponding to the bank180on the upper end of the encapsulation layer. Another passivation layer may further be provided on the upper end of the black matrix and the color filter. Each pixel may output one of red light, green light, white light and blue light by the color filter. However, as described above, the color filter may be provided at various positions on the lower end of the planarization layer160.

When the light emitting layer172outputs light having a unique color, the color filter may be omitted.

The encapsulation layer may be formed of at least one inorganic layer or at least one organic layer, and may be formed of at least one inorganic layer and at least one organic layer.

Another passivation layer may also serve as the encapsulation layer, and may be formed of at least one inorganic layer or at least one organic layer, or may be formed of at least one inorganic layer and at least one organic layer.

Hereinafter, an example of a method of manufacturing a light emitting display panel according to the present disclosure will briefly be described with reference toFIGS. 3A to 3E.

First, as shown inFIG. 3A, the driving light-shielding electrode120and the pad light-shielding electrode121are formed on the substrate110by exposure and etching processes using a first mask.

Next, as shown inFIG. 3B, the driving light-shielding electrode120and the pad light-shielding electrode121are covered by the buffer130. On the upper end of the buffer130, first metal materials forming the semiconductor layer143, the first electrode141and the second electrode142, which constitute the driving transistor Tdr, are formed by exposure and etching processes using a second mask.

As shown inFIG. 3C, the gate insulating layer144and the gate145are formed by exposure and etching processes using a third mask, whereby the semiconductor layer143, the first electrode141and the second electrode142may be formed.

Next, as shown inFIG. 3D, the driving transistor Tdr is covered by the passivation layer149, and the color filter150is provided in areas corresponding to the opening OA of the passivation layer149by using fourth to sixth masks.

The color filter150and the passivation layer149are covered by the planarization layer160, and the planarization layer160, the pixel driving circuit layer140(particularly, passivation layer149) and the buffer130are etched by exposure and etching processes using a seventh mask to form a pad hole PH and a driving contact hole DCH. In this case, a repair contact hole, which will be described below, is also formed.

Finally, as shown inFIG. 3E, a metal material for forming the anode171, the anode line174and the pad electrode175is provided on the upper end of the planarization layer160, a bank material for forming the bank180is provided on an upper end of the metal material, and the metal material and the bank material are etched by exposure and etching processes using an eighth mask to form the bank180, the anode171, the anode line174and the pad electrode175. In this case, the repair line may be formed on the upper end of the planarization layer160, and in particular, the repair line is formed in a repair contact hole provided in the planarization layer160.

Afterwards, the light emitting layer172and the cathode173are provided to cover the anode171and the bank180, and the cathode173may be covered by the encapsulation layer.

As described above, the light emitting display panel100according to the present disclosure may be formed using eight masks, and particularly, the planarization layer160, the pixel driving circuit layer140and the buffer130may be etched to form various types of contact holes (pad hole PH, driving contact hole DCH and repair contact hole).

FIG. 4is an exemplary view illustrating two pixels that are repaired in a light emitting display panel according to the present disclosure.FIGS. 5A and 5Bare exemplary views illustrating anodes provided in two adjacent pixels in a light emitting display panel according to the present disclosure. In this case, the anodes171aand171band the driving light-shielding electrode120, which are provided in the two pixels, are schematically illustrated inFIG. 5Bto describe a method for connecting anodes provided in two pixels. Also, the anodes171aand171band the first electrode141, which are provided in the two pixels, are schematically illustrated inFIG. 5Bto describe a method for connecting anodes provided in two pixels. Each of the pixels applied to the present disclosure includes a pixel driving circuit PDC and a light emitting element ED, as shown inFIG. 2. Therefore, the pixel driving circuit and the light emitting element are provided in each of the two pixels P1and P2shown inFIG. 4.

In the following description, one of the two pixels P1and P2shown inFIG. 4will be referred to as a first pixel P1and the other one of the two pixels P1and P2shown inFIG. 4will be referred to as a second pixel P2. In this case, the pixel driving circuit of the second pixel P2may not be normally driven, the light emitting element ED may be normally driven, and the pixel driving circuit and the light emitting element ED of the first pixel P1may be normally driven. Therefore, in the following description, the first pixel P1will be referred to as a normal pixel, and the second pixel P2will be referred to as a defective pixel.

Also, in the following description, the anode provided in the first pixel P1will be referred to as a first anode and marked with171a, and the anode provided in the second pixel P2will be referred to as a second anode and marked with171b.

When the first pixel P1and the second pixel P2are adjacent to each other and the second pixel P2is a defective pixel, the second anode171bof the light emitting element ED formed in the second pixel P2is connected to the first electrode141of the driving transistor Tdr formed in the first pixel P1by a repair process, as shown inFIG. 4.

In addition, the second anode171bprovided in the second pixel P2is separated from the first electrode141of the driving transistor Tdr provided in the second pixel P2through the repair process.

In this case, the light emitting element ED provided in the first pixel P1is connected to the first electrode141of the driving transistor Tdr provided in the first pixel P1.

Therefore, the light emitting element ED provided in the second pixel P2and the light emitting element ED provided in the first pixel P1may normally be driven by the driving transistor Tdr provided in the first pixel P1.

The repair process applied to the present disclosure will briefly be described as follows.

First, before the repair process is performed, as shown inFIG. 5A, the first anode171aprovided in the first pixel P1and the second anode171bprovided in the second pixel P2are separated from each other. That is, the repair line176provided in the first pixel P1and connected with the second anode171bof the second pixel P2is separated from the first anode171aof the first pixel P1. Therefore, the first anode171aand the second anode171bare separated from each other.

In this case, the first anode171ais connected with the first electrode141provided in the first pixel P1, and the second anode171bis connected with the first electrode141provided in the second pixel P2.

Therefore, the first anode171aand the second anode171bare driven separately. In this case, the cross-section of line B-B′ shown inFIG. 5Abefore the repair process is performed is shown inFIG. 7.

In the repair process, the first anode171amay be connected with the repair line176connected with the second anode171bprovided in the second pixel P2by the driving light-shielding electrode120. That is, as shown inFIG. 5A, the driving light-shielding electrode120is provided to overlap a driving contact hole DCH connected with the first anode171aand a repair contact hole RCH connected with the second anode171bthrough the repair line176. Therefore, the driving contact hole DCH and the repair contact hole RCH may electrically be connected with each other by the driving light-shielding electrode120, and thus the first anode171aand the second anode171bmay electrically be connected with each other. In this case, the second anode171bis electrically separated from the pixel driving circuit provided in the second pixel P2.

As described above, the second anode171bmay be connected with the first electrode141provided in the first pixel P1. Therefore, both the first anode171aand the second anode171bmay be connected with the first electrode141of the driving transistor Tdr provided in the first pixel P1, and thus the first anode171aand the second anode171bmay normally be driven by the driving transistor Tdr provided in the first pixel P1. In this case, the cross-section of line B-B′ shown inFIG. 5Aafter the repair process is performed is shown inFIGS. 8A and 8B.

Second, before the repair process is performed, as shown inFIG. 5B, the first anode171aprovided in the first pixel P1and the second anode171bprovided in the second pixel P2are separated from each other. That is, the repair line176provided in the first pixel P1and connected with the second anode171bof the second pixel P2is separated from the first anode171aof the first pixel P1. Therefore, the first anode171aand the second anode171bare separated from each other.

In this case, the first anode171ais connected with the first electrode141provided in the first pixel P1, and the second anode171bis connected with the first electrode141provided in the second pixel P2.

Therefore, the first anode171aand the second anode171bare driven separately. In this case, the cross section of line B-B′ shown inFIG. 5Bbefore the repair process is performed is shown inFIG. 11.

In the repair process, the first anode171amay be connected with the repair line176connected with the second anode171bprovided in the second pixel P2by the first electrode141. That is, as shown inFIG. 5B, the first electrode141is provided to overlap the driving contact hole DCH connected with the first anode171aand the repair contact hole RCH connected with the second anode171bthrough the repair line176. Therefore, the driving contact hole DCH and the repair contact hole RCH may electrically be connected with each other by the first electrode141, and thus the first anode171aand the second anode171bmay electrically be connected with each other. In this case, the second anode171bis electrically separated from the pixel driving circuit provided in the second pixel P2.

As described above, the second anode171bmay be connected with the first electrode141provided in the first pixel P1. Therefore, both the first anode171aand the second anode171bmay be connected with the first electrode141of the driving transistor Tdr provided in the first pixel P1, whereby the first anode171aand the second anode171bmay normally be driven by the driving transistor Tdr provided in the first pixel P1. In this case, the cross-section of line B-B′ shown inFIG. 5Bafter the repair process is performed is shown inFIGS. 12A and 12B.

Hereinafter, the embodiment in which the repair line176is connected with the first electrode141, the first anode171aand the second anode171bthrough the driving light-shielding electrode120through the repair process will be described with reference toFIGS. 5A and 6 to 9E, and the embodiment in which the repair line176is directly connected with the first electrode141and connected with the first anode171aand the second anode171athrough the repair process will be described with reference toFIGS. 5B and 10 to 13E.

FIG. 6is an exemplary view illustrating a plane of a first pixel provided in a light emitting display panel according to the present disclosure,FIGS. 7 to 8Bare exemplary views illustrating a cross-section taken along line B-B′ shown inFIG. 6, andFIGS. 9A to 9Eare exemplary views illustrating a method of manufacturing a light emitting display panel shown inFIGS. 6 and 7. In particular,FIG. 7shows a cross-section taken along line B-B′ when a repair process for the first pixel P1shown inFIG. 6is not performed, andFIGS. 8A and 8Bshow cross-sectional views taken along line B-B′ when the repair process for the first pixel P1shown inFIG. 6is performed.

In the following description, the same or similar elements as or to those described with reference toFIGS. 1 to 5Awill be omitted or briefly described. In particular, the following description will be based on the first pixel P1described with reference toFIGS. 4 and 5Aby way of example.

The light emitting display panel100according to the present disclosure, as described above, includes a substrate110including a non-display area103and a display area102provided with pixels101, a driving light-shielding electrode120provided in the substrate in the form of a pattern, a buffer130covering the driving light-shielding electrode120, a pixel driving circuit layer140provided in the buffer130, including a driving transistor Tdr connected with the driving light-shielding electrode120, a planarization layer160covering the pixel driving circuit layer140, an anode171provided in the planarization layer160and connected with the driving light-shielding electrode120and the driving transistor Tdr, a repair line176provided in the planarization layer160, a bank180forming an opening area OA from which the anode171is exposed, by covering an outer portion of the anode171, a light emitting layer172provided on the anode171and the bank180, and a cathode173provided on the light emitting layer.

First, when the repair process for the first pixel P1is not performed, a structure of the first pixel P1is as follows.

When the repair process for the first pixel P1is not performed, the repair line176provided in the first pixel P1is connected with an island-shaped contact electrode145aprovided below the repair line176, and the contact electrode145ais separated from the driving light-shielding electrode120by the buffer130, as shown inFIG. 7. In more detail, at least one insulating layer may be provided between the contact electrode145aand the driving light-shielding electrode120provided below the contact electrode145a, and the insulating layer may be the buffer130. A contact electrode insulating layer144aformed through the same process as that of the gate insulating layer144may further be provided between the contact electrode145aand the buffer130.

As shown inFIGS. 5A, 6 and 7, the repair line176is connected with the second anode171bprovided in the second pixel P2adjacent to the first pixel P1.

As shown inFIG. 7, the repair line176is connected with the contact electrode145ain the repair contact hole RCH that passes through the passivation layer149, which is provided in the pixel driving circuit layer140to cover the driving transistor Tdr, and the planarization layer160.

In this case, as shown inFIGS. 6 and 7, the first electrode141constituting the driving transistor Tdr provided in the first pixel P1and the light-shielding electrode120are connected with the first anode171athrough the anode line174provided in the driving contact hole DCH that passes through the planarization layer160, the pixel driving circuit layer140(particularly, passivation layer149) and the buffer130.

Second, when the repair process for the first pixel P1is performed, the structure of the first pixel P1is as follows.

When the repair process for the first pixel P1is performed, as shown inFIG. 8A, the repair line176may electrically be connected with the driving light-shielding electrode120through the repair contact hole RCH that passes through the passivation layer149, which is provided in the pixel driving circuit layer140to cover the driving transistor, the planarization layer160and the contact electrode145a.

When the contact electrode insulating layer144aformed through the same process as that of the gate insulating layer144is further provided between the contact electrode145aand the buffer130, the repair contact hole RCH passes through the contact electrode insulating layer144a.

Therefore, the repair line176is connected with the driving light-shielding electrode120.

Also, when the repair process for the first pixel P1is performed, as shown inFIG. 8b, the repair line176may electrically be connected with the driving light-shielding electrode120through the contact electrode145arecessed in the contact hole RCH. For example, in the repair process, when a laser is irradiated to the light emitting display panel shown inFIG. 7, the buffer130provided in the contact hole RCH may be cut. In this case, the contact electrode145aand the repair line176are recessed through the cut gap, whereby the contact electrode145amay be connected with the driving light-shielding electrode120. In more detail, the repair line176may be connected with the contact electrode145athrough the repair contact hole RCH that passes through the passivation layer149provided in the pixel driving circuit layer to cover the driving transistor and the planarization layer160, and may electrically be connected with the driving light-shielding electrode120through the contact electrode145awhich is recessed by passing through the insulating layer (buffer130or the buffer130and the contact electrode insulating layer144a) below the repair contact hole RCH.

When the contact electrode insulating layer144aformed through the same process as that of the gate insulating layer144is further provided between the contact electrode145aand the buffer130, the contact electrode insulating layer144aand the buffer130are cut in the repair process, and the contact electrode145amay be recessed through the cut gap and thus connected with the light-shielding electrode120.

Therefore, the repair line176connected with the contact electrode145ais connected with the driving light-shielding electrode120.

As described above, the driving light-shielding electrode120is connected with the first electrode141of the driving transistor Tdr.

Therefore, the repair line176may also electrically be connected with the first electrode141of the driving transistor Tdr through the repair process.

In this case, the first electrode141is connected with the first anode171aprovided in the first pixel P1through the anode line174, and is connected with the second anode171bprovided in the second pixel P2through the anode line174, the driving light-shielding electrode120and the repair line176.

That is, the first electrode141of the driving transistor Tdr provided in the first pixel P1may be connected with the first anode171aprovided in the first pixel P1, and may also be connected with the second anode171bprovided in the second pixel P2through the repair process. Therefore, the light emitting element ED provided in the second pixel P2(defective pixel) may normally be driven by the driving transistor Tdr provided in the first pixel P1(normal pixel).

According to the present disclosure described as above, in the manufacturing process of the light emitting display panel in which the planarization layer160, the passivation layer149and the buffer130are etched to form contact holes, the buffer130provided below the repair line176is not etched by the contact electrode145aprovided between the repair line176and the buffer130. The repair line176is provided to connect the driving transistor Tdr of the normal pixel (first pixel P1) with the light emitting element ED of the defective pixel (second pixel P2).

Therefore, as shown inFIG. 7, the repair line176provided in the first pixel P1that is not repaired is not electrically connected with other electrodes provided in the first pixel P1. As a result, the light emitting elements respectively provided in the first pixel P1provided with the repair line176and the second pixel P2may be driven independently.

However, as shown inFIG. 8AorFIG. 8B, the repair line176provided in the first pixel P1that is repaired may be connected with the driving light-shielding electrode120through the repair contact hole RCH. In this case, since the driving light-shielding electrode120is connected with the first electrode141of the driving transistor Tdr provided in the normal pixel (first pixel P1) and the repair line176is connected with the second anode171bof the defective pixel (second pixel P2), the second anode171bof the defective pixel may normally be driven by the driving transistor Tdr provided in the normal pixel.

Hereinafter, the manufacturing process of the first pixel P1described with reference toFIGS. 6 and 7will briefly be described with reference toFIGS. 9A to 9E. The manufacturing process of the first pixel P1shown inFIGS. 6 and 7is substantially the same as the manufacturing process of the light emitting display panel according to the present disclosure described with reference toFIGS. 3A to 3E, and thus a manufacturing process for the structures shown inFIGS. 6 and 7will be described below. Therefore, in the description ofFIGS. 9A to 9E, the same or similar elements as or to those described with reference toFIGS. 3A to 3Ewill be omitted or briefly described.

First, as shown inFIG. 9A, the driving light-shielding electrode120is provided on the substrate110. In this case, the pad light-shielding electrode121and various elements may be provided on the substrate110together with the driving light-shielding electrode120. The driving light-shielding electrode120may be formed of various types of metals.

As shown inFIG. 9B, the driving light-shielding electrode120is covered by the buffer130, and the semiconductor materials forming the semiconductor layer143, the first electrode141and the second electrode142, which constitute the driving transistor Tdr, are provided on the upper end of the buffer130. In a subsequent process, ions may be implanted into the semiconductor material or ultraviolet rays may be irradiated to the semiconductor material, whereby the first electrode141and the second electrode142may be formed.

Next, as shown inFIG. 9c, the gate145and the contact electrode145aare provided. That is, the gate145and the contact electrode145aare formed of the same material and are simultaneously formed through the same process. The gate145and the contact electrode145amay be formed of various types of metals.

Next, the gate145and the contact electrode145aare covered by the passivation layer149, the passivation layer149is covered by the planarization layer160, and the planarization layer160, the pixel driving circuit layer140(particularly, passivation layer149) and the buffer130are etched to form the driving contact hole DCH and the repair contact hole RCH as shown inFIG. 9D. Each of the passivation layer149and the planarization layer160may be comprised of at least one of various types of inorganic materials and organic materials.

Finally, as shown inFIG. 9E, the first anode171a, the anode line174and the repair line176are provided on the upper end of the planarization layer160. The first anode171a, the anode line174and the repair line176may be formed of at least one of various types of opaque metals or various types of transparent metals.

The bank180is provided on upper ends of the first anode171a, the anode line174and the repair line176, the light emitting layer172and the cathode173are provided to cover the first anode171aand the bank180, and the cathode173is covered by the encapsulation layer, whereby the first pixel P1shown inFIGS. 6 and 7may be manufactured.

The first pixel P1described as above has the following features.

In the first pixel P1, the first electrode141and the contact electrode145aare spaced apart from each other on the upper end of the buffer130as shown inFIGS. 7, 8A, and 8B.

Also, when the repair process is performed, as shown inFIG. 8A, the repair line176provided in the first pixel P1is connected with the second anode171bprovided in the second pixel adjacent to the first pixel P1, the repair line176provided in the first pixel P1is connected with the driving light-shielding electrode120through the repair contact hole RCH that passes through the passivation layer149provided in the pixel driving circuit layer140to cover the driving transistor Tdr, the planarization layer160, the contact electrode145aand the buffer130, and the driving light-shielding electrode120is connected with the first electrode141through the anode line174provided in the driving contact hole DCH. However, the repair line176, as shown inFIG. 8B, may electrically be connected with the driving light-shielding electrode120through the contact electrode145arecessed in the contact hole RCH.

In this case, the first electrode141includes a first active layer141aprovided on one side of the semiconductor layer143constituting the driving transistor Tdr, and a first conductor layer141bprovided on an upper end of the first active layer141a.

The anode line174connected with the first anode171ais connected with the first electrode141and the driving light-shielding electrode120in the driving contact hole DCH.

FIG. 10is another exemplary view illustrating a plane of a first pixel provided in a light emitting display panel according to the present disclosure,FIGS. 11 to 12Bare exemplary views illustrating a cross-section taken along line B-B′ shown inFIG. 10, andFIGS. 13A to 13Eare exemplary views illustrating a method of manufacturing a light emitting display panel shown inFIGS. 10 and 11. In particular,FIG. 11shows a cross-section taken along line B-B′ when a repair process for the first pixel P1shown inFIG. 10is not performed, andFIGS. 12A and 12Bshow cross-sections taken along line B-B′ when a repair process for the first pixel P1shown inFIG. 10is performed.

In the following description, the same or similar elements as or to those described with reference toFIGS. 1, 4 and 5Bwill be omitted or briefly described. In particular, the following description will be based on the first pixel P1described with reference toFIGS. 4 and 5Bby way of example.

The light emitting display panel100according to the present disclosure, as described above, includes a substrate110including a non-display area103and a display area102provided with pixels101, a driving light-shielding electrode120provided in the substrate in the form of a pattern, a buffer130covering the driving light-shielding electrode120, a pixel driving circuit layer140provided in the buffer130, including a driving transistor Tdr connected with the driving light-shielding electrode120, a planarization layer160covering the pixel driving circuit layer140, an anode171provided in the planarization layer160and connected with the driving light-shielding electrode120and the driving transistor Tdr, a repair line176provided in the planarization layer160, a bank180forming an opening area OA from which the anode171is exposed, by covering an outer portion of the anode171, a light emitting layer172provided on the anode171and the bank180, and a cathode173provided on the light emitting layer.

First, when the repair process for the first pixel P1is not performed, a structure of the first pixel P1is as follows.

When the repair process for the first pixel P1is not performed, as shown inFIG. 11, the repair line176provided in the first pixel P1is connected with an island-shaped contact electrode145aprovided below the repair line176, and the contact electrode145ais separated from the driving light-shielding electrode120by the buffer130.

In this case, the first electrode141is extended below the contact electrode145a. That is, the contact electrode145ais overlapped with the first electrode141.

A contact electrode insulating layer144aformed through the same process as that of the gate insulating layer144is provided between the contact electrode145aand the first electrode141. Therefore, the contact electrode145aand the first electrode141are insulated from each other. That is, at least one insulating layer may be provided between the contact electrode145aand the first electrode141provided below the contact electrode145a, and may be the gate insulating layer144.

As shown inFIGS. 5B, 10 and 11, the repair line176is connected with the second anode171bprovided in the second pixel P2adjacent to the first pixel P1.

As shown inFIG. 11, the repair line176is connected with the contact electrode145ain the repair contact hole RCH that passes through the passivation layer149, which is provided in the pixel driving circuit layer140to cover the driving transistor Tdr, and the planarization layer160.

In this case, as shown inFIGS. 10 and 11, the first electrode141constituting the driving transistor Tdr and the light-shielding electrode120are connected with the first anode171athrough the anode line174provided in the driving contact hole DCH that passes through the planarization layer160, the pixel driving circuit layer140and the buffer130.

Second, when the repair process for the first pixel P1is performed, the structure of the first pixel P1is as follows.

When the repair process for the first pixel P1is performed, as shown inFIG. 12A, the repair line176may electrically be connected with the first electrode141through the repair contact hole RCH that passes through the passivation layer149, which is provided in the pixel driving circuit layer140to cover the driving transistor, the planarization layer160, the contact electrode145aand the contact electrode insulating layer144a.

Therefore, the repair line176may electrically be connected with the first electrode141of the driving transistor Tdr provided in the first pixel P1.

Also, when the repair process for the first pixel P1is performed, as shown inFIG. 12B, the repair line176may electrically be connected with the first electrode141through the contact electrode145arecessed in the contact hole RCH. For example, in the repair process, when a laser is irradiated to the light emitting display panel shown inFIG. 11, the contact electrode insulating layer144aprovided in the contact hole RCH may be cut. In this case, the contact electrode145aand the repair line176are recessed through the cut gap, whereby the contact electrode145amay be connected with the first electrode141.

Therefore, the repair line176connected with the contact electrode145ais connected with the driving light-shielding electrode120.

The first electrode141is connected with the driving light-shielding electrode120through the anode line174.

In this case, the first electrode141is connected with the first anode171aprovided in the first pixel P1through the anode line174, and is connected with the second anode171bprovided in the second pixel P2through the repair line176.

That is, the first electrode141of the driving transistor Tdr provided in the first pixel P1may be connected with the first anode171aprovided in the first pixel P1, and may also be connected with the second anode171bprovided in the second pixel P2through the repair process. Therefore, the light emitting element ED provided in the second pixel P2(defective pixel) may normally be driven by the driving transistor Tdr provided in the first pixel P1(normal pixel).

According to the present disclosure described as above, in the manufacturing process of the light emitting display panel in which the planarization layer160, the passivation layer149and the buffer130are etched to form contact holes, the buffer130provided below the repair line176is not etched by the contact electrode145aprovided below the repair line176and the first electrode141. The repair line176is provided to connect the driving transistor Tdr of the normal pixel (first pixel P1) with the light emitting element ED of the defective pixel (second pixel P2).

Therefore, as shown inFIG. 11, the repair line176provided in the first pixel P1that is not repaired is not electrically connected with other electrodes provided in the first pixel P1. As a result, the light emitting elements respectively provided in the first pixel P1provided with the repair line176and the second pixel P2may be driven independently.

However, as shown inFIG. 12AandFIG. 12B, the repair line176provided in the first pixel P1that is repaired may be connected with the first electrode141through the repair contact hole RCH.

In this case, since the first electrode141is connected with the driving transistor Tdr provided in the normal pixel (first pixel P1) and the repair line176is connected with the second anode171bof the defective pixel (second pixel P2), the second anode171bof the defective pixel may normally be driven by the driving transistor Tdr provided in the normal pixel.

Hereinafter, the manufacturing process of the first pixel P1described with reference toFIGS. 10 and 11will briefly be described with reference toFIGS. 13A to 13E. The manufacturing process of the first pixel P1shown inFIGS. 10 and 11is substantially the same as the manufacturing process of the light emitting display panel according to the present disclosure described with reference toFIGS. 3A to 3E, and thus a manufacturing process for the structures shown inFIGS. 10 and 11will be described below. Therefore, in the description ofFIGS. 13A to 13E, the same or similar elements as or to those described with reference toFIGS. 3A to 3EandFIGS. 9A to 9Ewill be omitted or briefly described.

First, as shown inFIG. 13A, the driving light-shielding electrode120is provided on the substrate110.

Next, as shown inFIG. 13B, the driving light-shielding electrode120is covered by the buffer130, and the semiconductor materials forming the semiconductor layer143, the first electrode141and the second electrode142, which constitute the driving transistor Tdr, are provided on the upper end of the buffer130. In a subsequent process, ions may be implanted into the semiconductor material or ultraviolet rays may be irradiated to the semiconductor material, whereby the first electrode141and the second electrode142may be formed.

In this case, when the first electrode141shown inFIG. 13Bis compared with the first electrode141shown inFIG. 9b, the first electrode141shown inFIG. 13Bincludes a portion further protruded toward a left direction of the drawings shown inFIGS. 9B and 13B. The protruded portion of the first electrode141shown inFIG. 13Bis a portion overlapped with the contact electrode145aas shown inFIG. 11. That is, in the first pixel P1shown inFIGS. 10 and 11, the first electrode141is overlapped with the contact electrode145a. However, in the first pixel P1shown inFIGS. 6 and 7, the first electrode141is not overlapped with the contact electrode145a.

As shown inFIGS. 10 and 11, when the first electrode141is overlapped with the contact electrode145a, a separation space for separating the contact electrode145afrom the first electrode141is not required. Therefore, the opening area OA of the first pixel P1may be increased as much as the separation space for separating the contact electrode145afrom the first electrode141.

Next, as shown inFIG. 13C, the gate145and the contact electrode145aare provided.

Next, the gate145and the contact electrode145aare covered by the passivation layer149, the passivation layer149is covered by the planarization layer160, and the planarization layer160, the pixel driving circuit layer140(particularly, passivation layer149) and the buffer130are etched to form the driving contact hole DCH and the repair contact hole RCH as shown inFIG. 13D.

Finally, as shown inFIG. 13E, the first anode171a, the anode line174and the repair line176are provided on the upper end of the planarization layer160.

The bank180is provided on upper ends of the first anode171a, the anode line174and the repair line176, the light emitting layer172and the cathode173are provided to cover the first anode171aand the bank180, and the cathode173is covered by the encapsulation layer, whereby the first pixel P1shown inFIGS. 10 and 11may be manufactured.

The first pixel P1described as above has the following features.

That is, the contact electrode145ais provided on the upper end of the first electrode141, the contact electrode insulating layer144ais provided between the contact electrode145aand the first electrode141, and the driving contact hole DCH and the contact electrode (or repair contact hole RCH) are spaced apart from each other. That is, the contact electrode145ais overlapped with the first electrode141.

Therefore, a separation space for separating the contact electrode145afrom the first electrode141is not required, and thus the opening area OA of the first pixel P1may be increased as much as the separation space for separating the contact electrode145afrom the first electrode141.

Also, when the repair process is performed, as shown inFIG. 12A, the repair line176provided in the first pixel P1is connected with the second anode171bprovided in the second pixel P2adjacent to the first pixel P1, the repair line176provided in the first pixel P1is connected with the first electrode141through the repair contact hole RCH that passes through the passivation layer149provided in the pixel driving circuit layer140to cover the driving transistor Tdr, the planarization layer160, the contact electrode145aand the contact electrode insulating layer144a, and the first electrode141is connected with the driving light-shielding electrode120through the anode line174provided in the driving contact hole DCH. However, the repair line176, as shown inFIG. 12B, may electrically be connected with the first electrode141through the contact electrode145arecessed in the contact hole RCH, and the first electrode141may electrically be connected with the driving light-shielding electrode120through the anode line174provided in the driving contact hole DCH.

In this case, the first electrode141includes a first active layer141aprovided on one side of the semiconductor layer143constituting the driving transistor Tdr, and a first conductor layer141bprovided on an upper end of the first active layer141a.

The anode line174connected with the first anode171ais connected with the first electrode141and the driving light-shielding electrode120in the driving contact hole DCH.

According to the present disclosure described as above, in the manufacturing process of the light emitting display panel in which the planarization layer, the passivation layer and the buffer are etched to form contact holes, the buffer130provided below the repair line176is not etched by the contact electrode145aprovided below the repair line176. Therefore, the repair line176provided in the pixel that is not repaired is not electrically connected with other electrodes provided in the pixel that is not repaired. As a result, the light emitting elements respectively provided in the two pixels provided with the repair line176may be driven independently.

According to the present disclosure, the following advantageous effects may be obtained.

According to the present disclosure, in the manufacturing process of the light emitting display panel in which the planarization layer, the passivation layer and the buffer are etched to form contact holes, the buffer provided below the repair line for connecting the driving transistor of the normal pixel with the light emitting element of the defective pixel is not etched by the contact electrode provided below the repair line. Therefore, the repair line provided in the pixel that is not repaired is not electrically connected with the other electrodes provided in the pixel that is not repaired. Therefore, the light emitting elements respectively provided in the two pixels provided with the repair line may be driven independently.

In particular, when the first electrode of the driving transistor is provided between the contact electrode provided below the repair line in the repair contact hole and the buffer, a separation space is not required between the contact electrode and the first electrode, whereby an aperture ratio of the pixel may be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the light emitting display panel and the light emitting display apparatus using the same display device of the present disclosure without departing from the technical idea or scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.