KR20110061156A - Organic light emitting diode device - Google Patents

Abstract

PURPOSE: An organic electroluminescent device is provided to improve the lifetime of a blue light emitting unit by expanding the area of a blue light emitting unit without decreasing the area of a red light emitting unit or green light emitting unit. CONSTITUTION: Red light emitting units(100R) are vertically arranged. Green light emitting units(100G) are adjacent to the red light emitting units. Blue light emitting units(100B) are adjacent to the green light emitting units. A first driving unit(131) is connected between the red light emitting unit and a first data line. A second driving unit(132) is connected between the green light emitting unit and a second data line.

Description

Organic Light Emitting Diode Device

The present invention relates to an organic electroluminescent device.

Recently, the importance of flat panel displays (FPDs) has increased with the development of multimedia. In response to this, a variety of liquid crystal displays (LCDs), plasma display panels (PDPs), field emission displays (FEDs), organic light emitting devices (Organic Light Emitting Devices), etc. Flat panel displays have been put into practical use.

In particular, the organic light emitting device has a high response time with a response speed of 1 ms or less, low power consumption, and self-luminous light. In addition, there is no problem in viewing angle, which is advantageous as a moving image display medium regardless of the size of the device. In addition, low-temperature manufacturing is possible, and the manufacturing process is simple based on the existing semiconductor process technology has attracted attention as a next-generation flat panel display device in the future.

The organic light emitting device includes a light emitting layer between the anode and the cathode, so that holes supplied from the anode and electrons received from the cathode combine in the light emitting layer to form an exciton, which is a hole-electron pair, and then the exciton is in the bottom state. It is emitted by the energy generated by the return.

The organic light emitting diode as described above has a great influence on the life of the device according to the area of each of the red, green, and blue light emitting parts. Conventionally, organic light emitting diodes have been using a method of improving the lifetime of a blue light emitting part by reducing a red or green light emitting part to enlarge a blue light emitting part.

However, as the red or green light emitting part is reduced, the lifespan of the entire white is reduced, thereby reducing the reliability of the organic light emitting device.

The present invention provides an organic electroluminescent device capable of improving the life of white by improving the life of the blue light emitting portion without reducing the red or green light emitting portion.

In order to achieve the above object, the organic light emitting display device according to an embodiment of the present invention, the red light emitting parts disposed side by side in the vertical direction, the green light emitting parts adjacent to the red light emitting parts, arranged side by side in the vertical direction, Blue light emitting parts adjacent to the green light emitting parts and arranged in parallel in the vertical direction, a first data line through which data is supplied to the red light emitting parts, a first driving part connected between the red light emitting parts and the first data line, A second data line to which data is supplied to the green light emitting parts, a second driver disposed to be at least partially shifted into a space between the red light emitting parts and connected between the green light emitting parts and the second data line, and the blue light emitting parts At least a part of the space between the third data line and the green light emitting portion to which data is supplied And a third driver disposed to be shifted and connected between the blue light emitting parts and the third data line.

The display apparatus may further include a first common voltage line supplied with a common voltage to the red light emitting parts, and the first data line and the first common voltage line may include a bent part protruding into a space between the red light emitting parts.

The first common voltage line and the first data line are located at one side of the red light emitting parts, and the first common voltage line is connected to the first driving part through a lower portion of the first data line. It may include a line pattern.

The display apparatus may further include a second common voltage line supplied with a common voltage to the green light emitting parts, and the second data line and the second common voltage line may include a bent part protruding into a space between the green light emitting parts.

The second common voltage line and the second data line are located at one side of the green light emitting parts, and the second common voltage line is connected to the second driving part through a lower portion of the second data line. It may include a line pattern.

The display device may further include a third common voltage line through which a common voltage is supplied to the blue light emitting parts, and the third data line and the third common voltage line may include a bent part protruding into a space between the blue light emitting parts.

The third common voltage line and the third data line are located at one side of the blue light emitting parts, and the third common voltage line is connected to the third driving part through the lower portion of the third data line. It may include a line pattern.

The area of the blue light emitting part may be larger than the area of the red light emitting part or the green light emitting part.

And further comprising a first common voltage line to which a common voltage is respectively supplied to the red light emitting parts and the green light emitting parts, wherein the first data line, the second data line, and the first common voltage line are disposed between the red light emitting parts. It may be provided with a bent portion protruding into the space.

The first common voltage line is positioned between the first data line and the second data line, and the first and second line patterns connected to the first driver through a lower portion of the first data line, and the second Third and fourth line patterns connected to the second driver through the lower portion of the data line may be included.

The display device may further include a second common voltage line through which a common voltage is supplied to the blue light emitting parts, and the third data line and the second common voltage line may include a bent part protruding into a space between the green light emitting parts.

The second common voltage line and the third data line are positioned at one side of the blue light emitting parts, and the third data line is connected to the third driving part through a lower portion of the second common voltage line. It may include.

The present invention can improve the life of blue by expanding the area of the blue light emitting portion without reducing the area of the red light emitting portion or the green light emitting portion. Therefore, there is an advantage of improving the lifespan of red, green, blue, and white and providing an organic light emitting diode having excellent reliability.

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

1 is a plan view illustrating an organic light emitting display device according to a first exemplary embodiment of the present invention.

Referring to FIG. 1, the red light emitting parts 100R arranged side by side in the vertical direction, the green light emitting parts 100G and the green light emitting parts 100G which are adjacent to the red light emitting parts 100R and are arranged side by side in the vertical direction. Are adjacent to each other, and the blue light emitting parts 100B are disposed side by side in the vertical direction.

One side of the red light emitting unit 100R is arranged in parallel with the red light emitting unit 100R and is parallel with the first data line 111 and the first data line 111 to which data is supplied to the red light emitting unit 100R. The first common voltage line 121 is arranged to be positioned. Also, a first driver 131 connected between the red light emitter 100R and the first data line 111 is positioned. In addition, a first line pattern 104c and a second line pattern 104d connecting the first common voltage line 121 and the first driver 131 through the lower portion of the first data line 111 may be located. have.

One side of the green light emitting unit 100G is arranged in parallel with the green light emitting unit 100G and is arranged in parallel with the second data line 112 and the second data line 112 to which data is supplied to the green light emitting unit 100G. The second common voltage line 122 is positioned. In addition, a second driver 132 connected between the green light emitting unit 100G and the second data line 112 is positioned. In addition, a third line pattern 124c and a fourth line pattern 124d connecting the second common voltage line 122 and the second driver 132 through the lower portion of the second data line 112 may be located. have.

On one side of the blue light emitting unit 100B, a third data line 113 is arranged side by side with the blue light emitting unit 100B and the data is supplied to the blue light emitting unit 100B, and is parallel with the third data line 113. The third common voltage line 123 is arranged. In addition, a third driver 133 connected between the blue light emitting unit 100B and the third data line 113 is positioned. In addition, a fifth line pattern 134c and a sixth line pattern 134d connecting the third common voltage line 123 and the third driver 133 may be positioned through the lower portion of the third data line 113. have.

The first to third data lines 111, 112, and 113 and the first to third common voltages are disposed between the red light emitting units 100R, the green light emitting units 100G, and the blue light emitting units 100B. Scan lines 105 that intersect lines 121, 122, 123 may be located.

The first to third driving units 131, 132, and 133 connected to the light emitting units 100R, 100G, and 100B may include a switching thin film transistor T1, a driving thin film transistor T2, and a capacitor Cst, respectively. .

The red, green, and blue light emitting parts arranged as described above may implement red, green, and blue colors, respectively, to implement full color including white.

In the present invention, a part of the second driver 132 may be shifted to a space between the red light emitting parts 100R. Accordingly, the first data line 111 and the first common voltage line 121 are formed to have the bent portion RP protruding into the space between the red light emitting portions 100R as the second driving portion 132 is shifted. Can be.

In addition, a portion of the third driver 133 may be shifted to a space between the green light emitting parts 100G. Accordingly, the second data line 112 and the second common voltage line 122 are formed to have a bent portion RP protruding into the space between the green light emitting portions 100G as the third driving portion 133 is shifted. Can be.

In addition, the third data line 113 and the third common voltage line 123 may have a bent portion RP protruding into a space between the blue light emitting portions 100B to be connected to the shifted third driver 133. Can be formed.

As such, the first driving unit 131 of the red light emitting unit 100R, the second driving unit 132 of the green light emitting unit 100G, and the blue color are spaces between the red light emitting units 100R and the green light emitting units 100G. Since the third driving unit 133 of the light emitting unit 100B is located, the area of the blue light emitting unit 100B can be enlarged.

Accordingly, the area of the red light emitting unit 100R or the green light emitting unit 100G is not reduced, and the blue light emitting unit 100B forms an area larger than that of the red light emitting unit 100R or the green light emitting unit 100G. As a result, the lifespan of the blue light emitting portion 100B can be improved.

2 is a plan view illustrating an organic light emitting display device according to a second exemplary embodiment of the present invention.

Referring to FIG. 2, the red light emitting parts 200R arranged side by side in the vertical direction, the green light emitting parts 200G and the green light emitting parts 200G which are adjacent to the red light emitting parts 200R and arranged side by side in the vertical direction. Adjacent to and blue light emitting parts 200B are disposed side by side in the vertical direction.

One side of the red light emitting unit 200R is arranged in parallel with the red light emitting unit 200R and is parallel with the first data line 211 and the first data line 211 to which data is supplied to the red light emitting unit 200R. The first common voltage line 221 is arranged. In addition, a first driver 231 connected between the red light emitter 200R and the first data line 211 is positioned. In addition, a first line pattern 204c and a second line pattern 204d connecting the first common voltage line 221 and the first driver 231 through the lower portion of the first data line 211 may be located. have.

On one side of the green light emitting unit 200G, a second data line 212 is disposed in parallel with the green light emitting unit 200G and supplied with data to the green light emitting unit 200G. In addition, a second driver 232 connected between the green light emitting unit 200G and the second data line 212 is positioned. Here, the second data line 212 is positioned adjacent to the first common voltage line 221. In addition, a third line pattern 224c and a fourth line pattern 224d may be positioned to connect the first common voltage line 221 and the second driver 232 through the lower portion of the second data line 212. have.

On one side of the blue light emitting unit 200B, a third data line 213 is arranged in parallel with the blue light emitting unit 200B and the data is supplied to the blue light emitting unit 200B, and is parallel with the third data line 213. The second common voltage line 222 is arranged. In addition, a third driver 233 connected between the blue light emitting unit 200B and the third data line 213 is positioned. The fifth line pattern 234c may be positioned to connect the third data line 213 and the third driver 233 through the lower portion of the second common voltage line 222.

The first to third data lines 211, 212, and 213 and the first and second common voltages are disposed between the red light emitting units 200R, the green light emitting units 200G, and the blue light emitting units 200B. Scan lines 205 may be positioned that intersect lines 221 and 122.

The first to third driving units 231, 232, and 233 connected to each of the light emitting units 200R, 200G, and 200B may include a switching thin film transistor T1, a driving thin film transistor T2, and a capacitor Cst, respectively. .

The red, green, and blue light emitting parts arranged as described above may implement red, green, and blue colors, respectively, to implement full color including white.

In the present invention, a part of the second driver 232 may be shifted to a space between the red light emitting parts 200R. Accordingly, the first data line 211, the first common voltage line 221, and the second data line 212 protrude into spaces between the red light emitting parts 200R as the second driver 232 is shifted. It may be formed to have a bent portion (RP).

In addition, a portion of the third driver 233 may be shifted to a space between the green light emitting parts 200G. Accordingly, the third data line 213 and the second common voltage line 222 are formed to have the bent portion RP protruding into the space between the green light emitting parts 200G as the third driving part 233 is shifted. Can be.

In particular, in the second embodiment of the present invention, the first common voltage line 221 may be connected to the first driver 231 and the second driver 232, respectively, and shared. In more detail, the first common voltage line 221 is connected to the first driver 231 through the first line pattern 204c and the second line pattern 204d, and the third line pattern 224c and the fourth line. It may be connected to the second driver 232 through the line pattern 224d.

As such, the first driving unit 231 of the red light emitting unit 200R, the second driving unit 232 of the green light emitting unit 200G, and the blue color are spaces between the red light emitting units 200R and the green light emitting unit 200G. Since the third driving unit 233 of the light emitting unit 200B is located, the area of the blue light emitting unit 200B can be enlarged.

Therefore, the area of the red light emitting portion 200R or the green light emitting portion 200G is not reduced, and the blue light emitting portion 200B forms an area larger than that of the red light emitting portion 200R or the green light emitting portion 200G. As a result, the lifespan of the blue light emitting portion 200B can be improved.

3 is a cross-sectional view taken along line II ′ of FIG. 1. Hereinafter, referring to FIG. 3, the above-described organic light emitting display device will be described in detail.

The cross-sectional structures of the above-described red, green, and blue light emitting parts and the first to third driving parts are similar to those of the first and second embodiments, and therefore, the red light emitting part and the first driving part will be denoted by the same reference numerals as in the first embodiment. An example will be described.

The semiconductor layers 102a and 102b are positioned on the substrate 101 made of glass, plastic, or metal, and the gate insulating layer 103 made of silicon oxide (SiO 2) or silicon nitride (SiN x) is positioned on the semiconductor layer 102. do. The gate electrode 104a, the capacitor lower electrode 104b, the first line pattern 104c, and the second line pattern 104d are disposed on the gate insulating layer 103.

An interlayer insulating layer 106 is positioned on the gate electrode 104a, the capacitor lower electrode 104b, and the first common voltage line patterns 104c and 104d. The interlayer insulating layer 106 has a third contact hole exposing the first and second contact holes 107a and 107b and the capacitor lower electrode 104b exposing both ends of the semiconductor layer 102a of the switching thin film transistor T1. 107c, fourth and fifth contact holes 107d and 107e exposing the first line pattern 104c, the sixth contact hole 107f exposing the second line pattern 104d, and a driving thin film transistor T2. 7th and 8th contact holes 107g and 107h exposing both ends of the semiconductor layer 102b of FIG.

On the interlayer insulating layer 106, a source electrode 109a connected to the semiconductor layer 102a of the switching thin film transistor T1 through a first contact hole 107a, and a semiconductor layer 102a through a second contact hole 107b. And a drain electrode 109b connected to the capacitor lower electrode 104b through the third contact hole 107c. In addition, the first line pattern (the capacitor upper electrode 109c, the first data line 111, and the fifth contact hole 107e connected to the first line pattern 104c through the fourth contact hole 107d) The first common power line 121 is connected to the second line pattern 104d through the sixth contact hole 107f and the 104c. A source electrode 109d connected to the semiconductor layer 102b of the driving thin film transistor T2 through the seventh contact hole 107g and a drain connected to the semiconductor layer 102b through the eighth contact hole 107h. The electrode 109e may be located.

The passivation film 115 having the via hole 116 is formed on the switching thin film transistor T1, the capacitor Cst, and the driving thin film transistor T2 to expose the drain electrode 109e of the driving thin film transistor T2. The first electrode 117 is connected to the drain electrode 109e through the via hole 116 on the passivation film 115. A bank layer 118 including an opening exposing the first electrode 117 is positioned on the first electrode 117, and an organic layer 118 including at least a light emitting layer is positioned on the first electrode 117. . The second electrode 120 may be positioned on the entire surface of the substrate 101 including the organic layer 118.

Hereinafter, an embodiment in which the lifespan of each of red, green, blue, and white of an organic light emitting display device manufactured according to an embodiment of the present invention is measured. However, the following examples are merely to illustrate the present invention is not limited to the following examples.

Figure 4a is a view showing a light emitting portion of the organic light emitting device manufactured according to the comparative example of the present invention, Figure 4b is a graph showing the life of red, green, blue, white of the organic light emitting device according to the comparative example, 5a is a view showing a light emitting part of the organic light emitting device manufactured according to the embodiment of the present invention, Figure 5b is a graph showing the life of red, green, blue, white of the organic light emitting device according to the embodiment.

Referring to FIGS. 4A and 4B, the comparative example reduces the area of the red light emitting part and the green light emitting part, and expands the area of the blue light emitting part by the reduced area of the red and green light emitting parts to manufacture an organic light emitting display device.

Looking at the life when the luminance of the organic light emitting device manufactured according to the comparative example reaches 50%, the life of red is 6800 hours, the life of green is 6500 hours, the life of blue is 6800 hours, and the life of white It can be seen that it appears as 7000 hours.

Meanwhile, referring to FIGS. 5A and 5B, the embodiment manufactures the organic light emitting diode by expanding the area of the blue light emitting part by changing the structure of only the driving part and the wiring part without reducing the area of the red light emitting part and the green light emitting part. It was.

Looking at the life of the organic light emitting device manufactured according to the embodiment, it can be seen that the life of the red color is 27000 hours, the green life is 15000 hours, the blue life is 7000 hours, and the white life is 15000 hours.

That is, it can be seen that the organic electroluminescent device manufactured according to the present embodiment has a much improved lifespan characteristic compared to the comparative example.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood that the invention may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

1 is a plan view showing an organic light emitting display device according to a first embodiment of the present invention.

2 is a plan view illustrating an organic light emitting display device according to a second exemplary embodiment of the present invention.

3 is a cross-sectional view taken along line II ′ of FIG. 1;

4A is a view showing a light emitting part of an organic light emitting display device manufactured according to a comparative example of the present invention.

Figure 4b is a graph showing the life of red, green, blue, W of the organic light emitting device according to the comparative example.

Figure 5a is a view showing a light emitting portion of the organic light emitting device manufactured according to the embodiment of the present invention.

Figure 5b is a graph showing the life of red, green, blue, white of the organic light emitting device according to the embodiment.

Claims (12)

Red light emitting parts disposed side by side in the vertical direction; Green light emitting parts adjacent to the red light emitting parts and disposed side by side in the vertical direction; Blue light emitting parts adjacent to the green light emitting parts and disposed side by side in the vertical direction; A first data line through which data is supplied to the red light emitting parts; A first driver connected between the red light emitting parts and the first data line; A second data line to which data is supplied to the green light emitting units; A second driver disposed at least partially shifted into a space between the red light emitting parts and connected between the green light emitting parts and the second data line; A third data line through which data is supplied to the blue light emitting parts; And And a third driver disposed at least partially shifted into a space between the green light emitting parts and connected between the blue light emitting parts and the third data line. The method of claim 1, And further comprising a first common voltage line supplied with the common voltage to the red light emitting parts, The first data line and the first common voltage line have a bent portion protruding into the space between the red light emitting portion. 3. The method of claim 2, The first common voltage line and the first data line are located at one side of the red light emitting units, The first common voltage line includes first and second line patterns connected to the first driver through a lower portion of the first data line. The method of claim 1, A second common voltage line supplied with a common voltage to the green light emitting parts; And the second data line and the second common voltage line have a bent portion protruding into a space between the green light emitting portions. The method of claim 4, wherein The second common voltage line and the second data line are located at one side of the green light emitting units, The second common voltage line includes third and fourth line patterns connected to the second driver through a lower portion of the second data line. The method of claim 1, A third common voltage line supplied with a common voltage to the blue light emitting parts; And the third data line and the third common voltage line have a bent portion protruding into a space between the blue light emitting portions. The method of claim 6, The third common voltage line and the third data line are located at one side of the blue light emitting parts, And the third common voltage line includes fifth and sixth line patterns connected to the third driver through a lower portion of the third data line. The method of claim 1, The area of the blue light emitting portion is larger than the area of the red light emitting portion or the green light emitting device. The method of claim 1, A first common voltage line to which a common voltage is respectively supplied to the red light emitting parts and the green light emitting parts, The first data line, the second data line and the first common voltage line have a bent portion protruding into a space between the red light emitting portions. The method of claim 9, The first common voltage line is positioned between the first data line and the second data line; First and second line patterns connected to the first driver through the lower portion of the first data line, and third and fourth line patterns connected to the second driver through the lower portion of the second data line. Organic electroluminescent device. The method of claim 9, A second common voltage line supplied with a common voltage to the blue light emitting parts; And the third data line and the second common voltage line have a bent portion protruding into a space between the green light emitting portions. The method of claim 11, The second common voltage line and the third data line are located at one side of the blue light emitting parts. The third data line includes a fifth line pattern connected to the third driver through a lower portion of the second common voltage line.

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