KR20170038346A - Organic Light Emitting Diode Display Device - Google Patents

Abstract

The present invention provides an organic light emitting diode display device including: a circular substrate including a display region and a non-display region surrounding the display region; a gate line, a data line, a power line, and a reference line which are arranged in the display region and cross each other to define a pixel region; a thin film transistor and a light emitting diode arranged in the pixel region; first to third supply lines arranged in the non-display region, having a circular ring shape, and supplied with first to third power supply voltages, respectively; and first to third connection lines connected to the first to third supply lines. Accordingly, an area of the region where the supply lines for supplying the power supply voltages are arranged is minimized, so that an area of a bezel region is reduced, and appearance quality is improved.

Description

[0001] The present invention relates to an organic light emitting diode (OLED) display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting diode (OLED) display device, and more particularly, to a circular organic light emitting diode display device in which a bezel region is minimized.

An organic light emitting diode (OLED) display device, which is one of a flat panel display (FPD), has high luminance and low operating voltage characteristics.

In addition, since it is a self-emitting type that emits light by itself, it has a large contrast ratio, can realize an ultra-thin display, has a response time of several microseconds, is easy to realize a moving image, And is driven at a low voltage of 5 to 15 V of direct current, so that it is easy to manufacture and design a driving circuit.

In addition, since the manufacturing process of the organic light emitting diode display device is all of deposition and encapsulation, the manufacturing process is very simple.

In general, the organic light emitting diode display device has a rectangular shape. In recent years, however, various types of display devices other than a square such as a clock, a mobile phone, a game machine, and a digital frame have been required.

Particularly, research has been actively carried out to apply an organic light emitting diode display device using a plastic substrate to a circular display device such as a smart watch. In a circular display device, unlike a square display device, bezel region is relatively wide and is not symmetrical in the up, down, left, and right directions.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to provide a circular organic light emitting diode display device in which the area of a region where a plurality of power supply lines are arranged is minimized, The purpose.

According to an aspect of the present invention, there is provided a display device including a circular substrate including a display region and a non-display region surrounding the display region, a gate wiring provided in the display region, A display device comprising: a data line, a power line, and a reference line; a thin film transistor and a light emitting diode arranged in the pixel region; a first transistor arranged in the non-display region and having a circular ring shape, To third supply wiring and first to third connection wiring connected to the first to third supply wirings.

The thin film transistor includes a gate electrode, a semiconductor layer, a source electrode, and a drain electrode. The light emitting diode includes a first electrode, a light emitting layer and a second electrode. A light shielding layer is disposed under the thin film transistor, Wherein the light-shielding layer, the gate electrode, the source electrode, the drain electrode, and the first electrode are made of first to fourth conductive materials, respectively, ≪ / RTI > material.

The first to third supply wirings are arranged in a concentric manner from the edge of the non-display region to the center in order, each of the first to third supply wirings has a width of the first length and is made of the same layer and the same material .

The first supply interconnection supplies the first power supply voltage to the lower portion of the display region through the first connection interconnection and the third supply interconnection is connected to the lower portion of the display region through the third interconnection interconnection The first connection wiring is made of a different material from the first supply wiring, and the third connection wiring is made of the same layer and the same material as the third supply wiring .

In addition, the first to third supply wirings are sequentially arranged from the edge of the non-display area toward the center, the first to third supply wirings are spaced apart from each other in a concentric form, and the first supply wiring includes a circular ring having a width of the first length Wherein the second supply wiring comprises an upper semicircular ring having a width of a second length less than the first length and a lower semicircular ring having a width of the first length, And an upper semicircular ring having a width of the third length that is less than the first length and greater than the second length.

The second supply wiring supplies the second power supply voltage to a lower portion of the display region through the second connection wiring, and the third supply wiring is connected to the upper portion of the display region And the second connection wiring is made of the same layer and the same material as the second supply wiring and the third connection wiring is made of the same layer and the same material as the third supply wiring .

The first to third supply wires may be made of different materials or different materials, each having a width of a first length and overlapping each other at a cross-sectional area.

The first through third supply wirings supply the first through third supply voltages to the display region through the first connection wirings, respectively, and the first connection wirings supply the first through third supply wirings And a different layer.

The organic light emitting diode display may further include a gate-in-panel type gate driver disposed in the non-display area in an outer space, a spacing space, or inside of the first to third supply wires.

The present invention has the effect of reducing the area of the bezel area and improving the appearance quality by minimizing the area of a region where a plurality of power supply wiring lines are disposed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an appearance of an organic light emitting diode display device according to a first embodiment of the present invention; FIG.
2 is a plan view showing a substrate of an organic light emitting diode display device according to a first embodiment of the present invention;
3 is a cross-sectional view illustrating a pixel region of a substrate of an organic light emitting diode display device according to a first embodiment of the present invention.
FIG. 4 is a plan view of a substrate of an organic light emitting diode display device according to a second embodiment of the present invention. FIG.
5 is a plan view showing a substrate of an organic light emitting diode display device according to a third embodiment of the present invention.

An organic light emitting diode display device according to the present invention will be described with reference to the accompanying drawings.

2 is a plan view showing a substrate of an organic light emitting diode display device according to a first embodiment of the present invention, and FIG. 2 is a plan view showing a substrate of the organic light emitting diode display device according to the first embodiment of the present invention. 3 is a cross-sectional view illustrating a pixel region of a substrate of an organic light emitting diode display device according to a first embodiment of the present invention.

1 to 3, the organic light emitting diode display device 110 according to the first embodiment of the present invention includes a timing controller, a data driver, and a display panel, which includes a circular substrate 120 ).

The substrate 120 includes a central display area DA and a non-display area NDA surrounding the display area DA.

A gate wiring GL and a data wiring DL for defining a pixel region P intersecting with each other and a power wiring line DL spaced from the data wiring DL in parallel are formed in a display region DA above the substrate 120 PL and a reference wiring RL are arranged.

A switching thin film transistor (not shown), a driving thin film transistor Td and a light emitting diode De are arranged in each pixel region P above the substrate 120. [

The switching thin film transistor is connected to the gate wiring GL and the data wiring DL while the driving thin film transistor Td is connected to the switching thin film transistor and the power wiring PL and the light emitting diode De is connected to the driving thin film transistor Td ) To emit red, green, and blue light.

The switching thin film transistor and the driving thin film transistor Td are arranged in each pixel region P in the first embodiment, A plurality of other thin film transistors may be arranged.

The driving thin film transistor Td includes a semiconductor layer 146, a gate electrode 150, a source electrode 154 and a drain electrode 156. The light emitting diode De includes a first electrode 160, 164 and a second electrode 166.

A light shielding layer 142 is formed on the substrate 120 and a buffer layer 144 is formed on the entire surface of the substrate 120 above the light shielding layer 142.

A semiconductor layer 146 is formed on the buffer layer 144 and a gate insulating layer 148 and a gate electrode 150 are sequentially formed on the semiconductor layer 146. The semiconductor layer 146 is formed on the active region And a source region and a drain region on both sides of the active region, and may be formed of one of amorphous silicon, polycrystalline silicon, and an oxide semiconductor.

An interlayer insulating layer 152 is formed on the entire surface of the substrate 120 on the gate electrode 150. The interlayer insulating layer 152 is formed on the gate electrode 150 in such a manner that first and second And includes contact holes.

A source electrode 154 and a drain electrode 156 connected to the source region and the drain region of the semiconductor layer 146 through the first and second contact holes are formed on the interlayer insulating layer 152, respectively.

Though not shown, the switching thin film transistor may have the same cross-sectional structure as the driving thin film transistor Td.

A protective layer 158 is formed on the switching thin film transistor and the driving thin film transistor Td and includes a third contact hole exposing the source electrode 154 of the driving thin film transistor Td.

A first electrode 160 is formed on the protective layer 158 and a bank layer covering the edge of the first electrode 160 and exposing the center of the first electrode 160 is formed on the first electrode 160. 162 are formed.

A light emitting layer 164 is formed on the first electrode 160 exposed through the bank layer 162 and a second electrode 166 is formed on the entire surface of the substrate 120 on the light emitting layer 164.

Here, the light shielding layer 142, the gate electrode 150, the source electrode 154, the drain electrode 156, and the first electrode 160 may be formed of first to fourth conductive materials, respectively.

A switch 112 for controlling the power supply of the organic light emitting diode display device 110 and a driving pad 112 for connecting to a driving circuit such as a timing control unit and a data driving unit are provided on the upper portion of the non- And a touch pad 116 for connecting to the touch panel is disposed at the lower end of the non-display area NDA on the upper side of the substrate 120.

The first to third supply wirings 122, 124, and 126 are sequentially disposed in the center of the non-display area NDA on the substrate 120 from the edge toward the center in a concentric form. 1 to the third supply wiring 122, 124, 126 may be in the form of a circular ring having the same first length d1.

These first to third supply wirings 122, 124 and 126 are arranged such that the distance between the first and second supply wirings 122 and 124 is smaller than the distance between the second and third supply wirings 124 and 126 And a gate driver of a gate-in-panel (GIP) type may be disposed in the spacing space between the second and third supply wirings 122, 124.

The distance between the first and second supply wirings 122 and 124 is larger than the distance between the second and third supply wirings 124 and 126. In other embodiments, 124 and 126. In this case, a gate-in-panel (GIP) type gate driver may be disposed in the spacing space between the first and second supply wirings 122 and 124.

The light-shielding layer 142, the gate electrode 150, and the source electrode 154 of the display region DA can be formed of the same material and the same material, And the drain electrode 156 and the first electrode 160. The first electrode 160 may be formed of one of the first to fourth conductive materials.

For example, the first to third supply wirings 122, 124 and 126 may be wirings for supplying the high potential voltage VDD, the ground voltage GND and the reference voltage Vref to the display area DA, respectively , The first supply wiring 122 supplies the high potential voltage VDD to the power wiring PL of the display area DA via the first connection wiring 132 and the third supply wiring 126 supplies the high potential The reference voltage Vref can be supplied to the reference wiring line RL in the display area DA through the connection wiring 134. [

The second connection wiring 134 may be formed of the same material as the third supply wiring 126 and may be made of the same material (that is, one of the first to fourth conductive materials) 1 supply wiring 122, and a different layer (i.e., another one of the first through fourth conductive materials) to cross the second and third supply wiring 124, 126.

Although not shown, the second supply wiring 124 can supply a ground voltage (GND) to the display area DA via a separate connection wiring, and the other connection wiring is connected to the first and second connection wirings 132 and 134 And another material (i. E., Another one of the first through fourth conductive materials) to intersect the third supply wiring 126. The second supply wiring 126 may be formed of a material different from the first material.

Although the first to third supply wirings 122, 124 and 126 supply the high voltage VDD, the ground voltage GND and the reference voltage Vref in the first embodiment, The first to third supply wirings 122, 124 and 126 may supply the power supply voltage different from that of the first embodiment.

As described above, in the organic light emitting diode display device 110 according to the first embodiment of the present invention, the first voltage Vref for supplying the power supply voltage such as the reference voltage Vref, the ground voltage GND and the high potential voltage VDD The power supply voltage is stably supplied to the display area DA by disposing the third supply wirings 122, 124 and 126 concentrically in the non-display area NDA at the center of the substrate 120, It is possible to improve appearance quality by having an appearance.

In another embodiment, the bezel region of the organic light emitting diode display device can be reduced by dividing the region into two planes and arranging wirings for supplying two power supply voltages, which will be described with reference to the drawings.

FIG. 4 is a plan view of a substrate of an organic light emitting diode display according to a second embodiment of the present invention, and a description of the same portions as those of the first embodiment will be omitted.

4, the organic light emitting diode display according to the second embodiment of the present invention includes a timing controller, a data driver, and a display panel. The display panel includes a circular substrate 220.

The substrate 220 includes a central display area DA and a non-display area NDA surrounding the display area DA.

A gate wiring GL and a data wiring DL for defining a pixel region P intersecting each other and a power wiring line PL and a reference wiring RL are arranged.

A switching thin film transistor (not shown), a driving thin film transistor, and a light emitting diode (not shown) are disposed in each pixel region P above the substrate 220.

The driving thin film transistor includes a semiconductor layer, a gate electrode, a source electrode, and a drain electrode. The light emitting diode includes a first electrode, a light emitting layer and a second electrode, and a light shielding layer is formed under the semiconductor layer of the driving thin film transistor.

Here, the light-shielding layer, the gate electrode, the source electrode and the drain electrode, and the first electrode may be made of the first to fourth conductive materials, respectively.

A switch for controlling the power supply of the organic light emitting diode display device and a driving pad for connecting to the driving circuit such as the timing control part and the data driving part are disposed on the top of the non-display area NDA above the substrate 220, A touch pad for connecting to the touch panel is disposed at the lower end of the non-display area NDA on the upper side of the touch panel.

The first to third supply wirings 222, 224 and 226 spaced from each other in a concentric form are sequentially arranged from the edge toward the center at the center of the non-display area NDA on the substrate 220, 1 supply wiring 222 may be in the form of a ring having a first length d1 and the second supply wiring 224 may be of a second length d2 smaller than the first length d1 And a lower semicircular ring shape having a width of a first length d1 may be connected and the third supply wiring 226 may be of a shape that is smaller than the first length d1 and a second length d2 (D1 > d3 > d2) that is greater than the first length d3.

Here, the sum of the second and third lengths d2 and d3 may be substantially equal to the first length d1 (d2 + d3 to d1).

The first to third supply wirings 222, 224 and 226 are arranged such that the distance between the first and second supply wirings 222 and 224 is smaller than the distance between the second and third supply wirings 224 and 226 A gate-in-panel (GIP) type gate driver may be disposed in the spacing space between the first and second supply wirings 222 and 224.

Here, the first to third supply wirings 222, 224, and 226 may be formed of the same material and the same material. The light-shielding layer, the gate electrode, the source electrode and the drain electrode of the display area DA, The first to fourth conductive materials may be formed of one of the first to fourth conductive materials.

For example, the first to third supply wirings 222, 224 and 226 may be wirings for supplying the ground voltage GND, the reference voltage Vref and the high potential voltage VDD to the display area DA The second supply wiring 224 supplies the reference voltage Vref to the reference wiring RL of the display area DA via the first connection wiring 232 arranged in the lower half-circle region, and the third supply wiring 226 can supply the high potential voltage VDD to the power wiring PL in the display area DA through the second connection wiring 234 disposed in the upper half-circle region.

The first connection wiring 232 may be made of the same material as the second supply wiring 224 and may be made of the same material (i.e., one of the first to fourth conductive materials), and the second connection wiring 234 may be made of the same material 3 supply wiring 226 and the same material (that is, one of the first to fourth conductive materials).

Although not shown, the first supply wiring 222 can supply a ground voltage (GND) to the display area DA via a separate connection wiring, and the separate connection wiring is connected to the first and second connection wirings 132 and 134 (I.e., the other one of the first to fourth conductive materials) and may intersect the second and third supply wirings 224, 226.

Although the first to third supply wirings 222, 224 and 226 supply the ground voltage GND, the high-potential voltage VDD and the reference voltage Vref, respectively, in the second embodiment, The first to third supply wirings 222, 224 and 226 may supply a power supply voltage different from that of the second embodiment.

As described above, in the organic light emitting diode display device according to the second embodiment of the present invention, the first to third (ninth, ninth, ninth, ninth, By arranging the supply wirings 222, 224 and 226 concentrically in the non-display area NDA at the center of the substrate 220, the power supply voltage is stably supplied to the display area DA, So that the appearance quality can be improved.

The sum of the width of the second semicircular ring-shaped second length d2 of the second supply wiring 224 and the width of the third semicircular ring-shaped third length d3 of the third supply wiring 226 is equal to Is formed to be substantially equal to the width of the lower semicircular ring-shaped first length (d1) of the supply wiring (224), the bezel area can be reduced and the appearance quality can be further improved.

For example, the organic light emitting diode display 110 according to the first embodiment has a bezel area of about 2.5 mm in width, whereas the organic light emitting diode display according to the second embodiment has a bezel width of about 2.2 mm Area.

On the other hand, in another embodiment, the bezel region of the organic light emitting diode display device can be further reduced by superimposing the wiring for supplying the three power supply voltages, which will be described with reference to the drawings.

5 is a plan view showing a substrate of an organic light emitting diode display device according to a third embodiment of the present invention, and a description of the same parts as those of the first embodiment will be omitted.

5, the organic light emitting diode display according to the third embodiment of the present invention includes a timing controller, a data driver, and a display panel. The display panel includes a circular substrate 320.

The substrate 320 includes a central display area DA and a non-display area NDA surrounding the display area DA.

A gate wiring GL and a data wiring DL for defining a pixel region P intersecting with each other and a power wiring line DL spaced from the data line DL in parallel are formed in a display region DA above the substrate 320 PL and a reference wiring RL are arranged.

A switching thin film transistor (not shown), a driving thin film transistor, and a light emitting diode (not shown) are disposed in each pixel region P above the substrate 320.

The driving thin film transistor includes a semiconductor layer, a gate electrode, a source electrode, and a drain electrode. The light emitting diode includes a first electrode, a light emitting layer and a second electrode, and a light shielding layer is formed under the semiconductor layer of the driving thin film transistor.

Here, the light-shielding layer, the gate electrode, the source electrode and the drain electrode, and the first electrode may be made of the first to fourth conductive materials, respectively.

A switch for controlling the power source of the organic light emitting diode display device and a driving pad for connecting to the driving circuit such as the timing control part and the data driving part are disposed on the top of the non-display area NDA above the substrate 320, A touch pad for connecting to the touch panel is disposed at the lower end of the non-display area NDA on the upper side of the display area NDA 320.

The first to third supply wirings 322, 324 and 326 are arranged in the center of the non-display area NDA above the substrate 320 so as to be spaced apart from each other in cross- The wirings 322, 324 and 326 may be in the form of a circular ring having a width of the first length d1.

A gate driver of a gate-in-panel (GIP) type may be disposed outside the first to third supply wirings 322, 324 and 326. In another embodiment, A gate-in-panel (GIP) type gate is formed in the spacing space between the first to third supply wirings 322, 324, and 326, that is, the first to third supply wirings 322, 324, and 326 and the display area DA. A driving unit may be disposed.

The first to third supply wirings 322, 324 and 326 may be formed of different materials or different materials. The first, second, and third supply wirings 322, 324, and 326 may be formed of a light shielding layer, a gate electrode, a source electrode and a drain electrode, The first to fourth conductive materials may be formed of different materials.

For example, the first to third supply wirings 322, 324 and 326 may be wirings for supplying the ground voltage GND, the reference voltage Vref and the high potential voltage VDD to the display area DA The first to third supply wirings 322, 324 and 326 supply the ground voltage GND, the reference voltage Vref and the high potential voltage VDD to the display area DA via the first connection wiring 332 Can supply.

At this time, the first connection wiring 332 may be formed of a different layer from the first to third supply wiring 322, 324, and 326, or a different material (that is, another one of the first to fourth conductive materials).

Although the first to third supply wirings 322, 324 and 326 supply the ground voltage GND, the high-potential voltage VDD and the reference voltage Vref, respectively, in the third embodiment, The first to third supply wirings 322, 324 and 326 may supply a power supply voltage different from that of the third embodiment.

As described above, in the organic light emitting diode display device according to the third embodiment of the present invention, the first to third (ninth, ninth, eighth, and ninth) power supply voltages, such as the ground voltage GND, the reference voltage Vref, By arranging the supply wirings 322, 324 and 326 in the non-display area NDA at the center of the substrate 320, the power supply voltage is stably supplied to the display area DA, Can be improved.

Further, by forming the first to third supply wirings 322, 324 and 326 to overlap with each other, the bezel area can be further reduced and the appearance quality can be further improved.

For example, the organic light emitting diode display according to the first and second embodiments has a bezel area of about 2.5 mm and 2.2 mm, respectively, while the organic light emitting diode display according to the third embodiment has a bezel area of about 1.9 mm < / RTI > wide bezel area.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It can be understood that

110: organic light emitting diode display device 120: substrate
122: first supply wiring 124: second supply wiring
126: Third supply wiring

Claims (9)

A circular substrate including a display region and a non-display region surrounding the display region;
A gate wiring, a data wiring, a power wiring, and a reference wiring which are arranged in the display region and define pixel regions crossing each other;
A thin film transistor and a light emitting diode arranged in the pixel region;
First to third supply wirings arranged in the non-display area and having a circular ring shape and supplied with first to third supply voltages, respectively;
And first to third connection wirings connected to the first to third supply wirings
And an organic light emitting diode (OLED) display device.
The method according to claim 1,
Wherein the thin film transistor includes a gate electrode, a semiconductor layer, a source electrode, and a drain electrode,
The light emitting diode includes a first electrode, a light emitting layer, and a second electrode,
A light-shielding layer is disposed under the thin film transistor,
Wherein the light-shielding layer, the gate electrode, the source electrode, the drain electrode, and the first electrode are made of first to fourth conductive materials,
Wherein each of the first to third supply wirings comprises one of the first to fourth conductive materials.
3. The method of claim 2,
Wherein the first to third supply wirings are arranged in the order from the edge of the non-display region to the center in a concentric circular form and have a width of the first length, Diode display.
The method of claim 3,
Wherein the first supply interconnection supplies the first supply voltage to a lower portion of the display region through the first connection interconnection,
The third supply interconnection supplies the third supply voltage to a lower portion of the display region through the third interconnection interconnection,
Wherein the first connection wiring is made of a different material from the first supply wiring,
And the third connection wiring is made of the same material and the same material as the third supply wiring.
3. The method of claim 2,
Wherein the first to third supply wirings are sequentially arranged from an edge of the non-display region to a center thereof in a concentric circular form,
Wherein the first supply wiring includes a circular ring having a width of a first length,
The second supply wiring comprising an upper semicircular ring having a width of a second length less than the first length and a lower semicircular ring having a width of the first length,
And the third supply wiring includes an upper semicircular ring having a width of a third length smaller than the first length and larger than the second length.
6. The method of claim 5,
The second supply wiring supplies the second power supply voltage to a lower portion of the display region through the second connection wiring,
The third supply wiring supplies the third power supply voltage to the upper portion of the display region through the third connection wiring,
The second connection wiring is made of the same layer and the same material as the second supply wiring,
And the third connection wiring is made of the same material and the same material as the third supply wiring.
3. The method of claim 2,
Wherein the first to third supply wirings are made of different materials and are different from each other and having a width of a first length and overlapping each other with a cross sectional area.
8. The method of claim 7,
The first to third supply wirings supply the first to third supply voltages to the display region through the first connection wirings,
Wherein the first connection wiring is made of a different material from the first to third supply wiring layers.
The method according to claim 1,
And a gate-in-panel type gate driver disposed in the non-display area in an outer space, a spacing space, or inside of the first to third supply wires.

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