KR20130096002A - A light emitting device - Google Patents

Abstract

PURPOSE: A light emitting device is provided to improve brightness uniformity by controlling the operation of a panel according to an accurate measurement value of the voltage and current applied to an auxiliary electrode. CONSTITUTION: A first electrode unit (220) is arranged on a substrate. An auxiliary electrode unit (300) is arranged on the first electrode. A light emitting unit (240) is arranged on the auxiliary electrode unit and the first electrode unit. A second electrode unit (250) is arranged on the light emitting unit. A power supply unit supplies power to the light emitting unit through the first electrode unit, the second electrode unit, and the auxiliary electrode unit. A control unit is connected to the auxiliary electrode, measures the current or voltage applied to the auxiliary electrode, and controls the power supply of the power supply unit according to a measured result.

Description

A light emitting device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device having an organic light emitting portion, and more particularly, to a light emitting device capable of controlling a brightness by sensing a current applied to an auxiliary electrode.

Generally, an organic light-emitting diode (OLED) device includes an anode, an organic light emitting portion located on the anode, and a cathode located on the organic light emitting portion.

In the organic light emitting device, when a voltage is applied between the anode and the cathode, holes are injected from the anode into the organic light emitting portion, and electrons are injected from the cathode into the organic light emitting portion.

The holes and electrons injected into the organic light emitting portion are recombined in the organic light emitting portion to generate an exiton, and the exciton emits light while transitioning from the excited state to the ground state.

When the anode, the cathode, and the organic light emitting portion come in contact with moisture, oxygen, NOx, or the like in the air, the performance and lifetime of the anode, cathode, and organic light emitting portion are remarkably lowered.

The organic light emitting device itself can be manufactured as a thin film, and the thickness of the light source can be drastically reduced, the temperature rising tendency is small, and low power driving is possible.

 In addition, the organic light emitting device can function as a panel of a display device by using various kinds of organic light emitting materials capable of realizing various color lights, and is widely used for a backlight of a liquid crystal display device, various lighting devices, display devices and the like.

FIG. 1 is a diagram illustrating a form in which a positive power source and a negative power source are supplied in a conventional organic light emitting device.

In the organic light emitting device 10, positive (+) power is supplied to the electrode pads located on the left and right sides of the organic light emitting portion 20, and electrode pads located on the upper and lower sides of the organic light emitting portion 20 -) power is supplied.

However, the charge density is high around each edge and edge of the organic light emitting portion 20, but as shown by the arrow, the charge density becomes lower toward the center portion due to electric resistance or the like.

Therefore, in the organic light emitting portion 20, the edge portion having the highest density of positive and negative charges has the highest voltage and the highest luminance.

In the organic light emitting portion 20, the center portion having the lowest density of positive and negative charges has the lowest voltage and the lowest luminance.

For example, in the organic light emitting portion 20 having a size of 150 mm x 150 mm, if the luminance of the edge portion is 500 cd, the center portion is different by at least 250 cd. Such non-uniformity of brightness causes not only a high luminance but also an adverse effect on the lifetime of the organic light emitting portion 20.

On the other hand, as shown in Korean Patent Laid-Open No. 10-2009-0050950, an auxiliary electrode is used for another conventional organic light emitting diode device.

There was a remarkable difference in luminance between the rim portion of the organic light emitting device and the center portion thereof due to the resistance of the material used as the anode in general.

That is, although the charge density is high around each edge and edge of the organic light emitting portion, the charge density becomes lower toward the center portion due to electric resistance or the like.

Therefore, in the organic light emitting portion, the edge portion having the highest density of positive and negative charges has the highest voltage and the highest luminance.

In the organic light emitting portion, the lowest voltage is the lowest voltage at the central portion where the density of the positive and negative charges is lowest, and the luminance is the lowest.

If such a luminance unevenness occurs, it is difficult to obtain a high luminance, and the lifetime of the OLED is adversely affected.

In order to solve this problem, an auxiliary electrode having a resistance value lower than that of the anode is disposed on the anode so that current can be smoothly transmitted to the center of the organic light emitting device.

However, even in this case, the problem that the brightness varies in each region is not completely solved because a difference in resistance between the central portion and the outer portion of the auxiliary electrode occurs and a difference in the applied current occurs.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a light emitting device that improves luminance uniformity by accurately measuring voltage and current applied to an auxiliary electrode in a region where a luminance drop occurs and controlling driving of the panel in accordance with a measured value .

Another object of the present invention is to provide a light emitting device capable of precisely and efficiently controlling panel characteristics by accurately measuring panel characteristics such as voltage, current, and temperature by integrally forming sensing resistors on auxiliary electrodes .

Another object of the present invention is to provide a light emitting device which simplifies the production process and reduces the complexity of the external circuit by omitting the process of constructing the sensing resistor integrated with the auxiliary electrode to form an external sensing resistor will be.

According to an aspect of the present invention, A first electrode portion disposed on the substrate; An auxiliary electrode unit disposed on the first electrode; A light emitting unit disposed on the auxiliary electrode unit and the first electrode unit; A second electrode part provided in the light emitting part; A power supply unit for supplying power to the light emitting unit through the first electrode unit, the second electrode unit, and the auxiliary electrode unit; And a control unit connected to the auxiliary electrode to measure a current or a voltage applied to the auxiliary electrode and to control power supply to the power supply unit according to a measurement result.

The auxiliary electrode includes a water receiving portion forming an outer rim;

A wiring part provided to be surrounded by the power receiver and connected to the power receiver, and a sensing resistor provided on the power receiver.

Wherein the power receiver comprises: a first extension extending in an outward direction; A second extension extending from an end of the first extension; And an electrode exposing part formed by the first and second extending parts, wherein the sensing resistance is disposed in the direction of the second extending part from one side of the electrode exposing part.

And an end of the sensing resistor is spaced apart from the second extending portion.

The plurality of sensing resistors are disposed on one side edge of the power receiver and on the opposite side edge of the power receiver, respectively.

The plurality of sensing resistors are disposed to be spaced apart from each other along a rim of the power receiver.

And an insulating portion provided on the auxiliary electrode to insulate the auxiliary electrode from the light emitting portion.

The control unit controls the power supply by comparing the current flowing through the setting resistor including the sensing resistor or the voltage applied to the setting resistor with a reference voltage or a reference current.

Wherein the resistance value of the setting resistor is a sum of a resistance value of a pair of the sensing resistors formed at different rims and an equivalent resistance obtained by equalizing the auxiliary electrode between the pair of sensing resistors or a resistance value of one of the sensing resistors .

The sensing resistors are pairs of the sensing resistors having the shortest distance between the sensing resistors.

The control unit is a current control unit or an overcurrent protection circuit for controlling a current value applied to at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit, and the second electrode unit.

And the control unit is provided corresponding to each pair of the sensing resistors.

And the control unit is connected to at least one of the pair of sensing resistors.

Wherein the current control unit includes: a reference voltage supply circuit that generates a reference voltage based on an input voltage; A regulator-mirror circuit which is connected to the other end of the setting resistor, which is once connected to the ground, and which generates a control signal by the reference voltage and the setting resistor; And a current control circuit for controlling current flow of at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit, and the second electrode unit according to the control signal.

Wherein the current controller includes: a comparator having a first input terminal connected to one end of the setting resistor and a second terminal connected to a constant current source; And a switching element having a collector terminal connected to the other end of the setting resistor, a base terminal connected to an output terminal of the comparator, and an emitter terminal connected to a ground (GND).

A first resistor having one end connected to the input power source and the other end connected to one end of the setting resistor and a first input terminal of the comparator; A comparator in which the first input terminal is connected to the one end of the setting resistor and the first resistor, and the second input terminal is connected to the constant voltage source; And an output terminal of the comparator is connected to a gate terminal, and one of a source terminal and a drain terminal is connected to at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit, and the second electrode unit, And a switching element connected to the ground, and the other end of the setting resistor is connected to the ground.

The sensing resistance is characterized in that the resistance value varies with temperature.

Wherein the overcurrent protection circuit includes: a switching element having a collector terminal and an emitter terminal connected to a power source and a ground, respectively; A comparator having an output terminal connected to the base terminal of the switching device and one of the input terminals connected to the emitter terminal; And a second resistor having one end connected to the other input terminal of the comparator and the other end connected to one end of the setting resistor, wherein the setting resistor is connected between the second resistor and the collector terminal .

The present invention may include a protective cover provided on an upper portion of the second electrode;

And a conductive member provided on the protective cover and facing the second electrode unit,

Wherein the control unit is connected to the conductor and when the current of the auxiliary electrode unit corresponding to the portion where the conductor is disposed is lower than a predetermined reference value, a power source having an opposite polarity to the power source applied to the second electrode unit is applied Emitting device.

The light emitting device according to the present invention can accurately measure the voltage and current applied to the auxiliary electrode in the region where the luminance drop occurs and control the driving of the panel according to the measured value to improve the luminance uniformity.

In addition, the light emitting device according to the present invention can accurately measure panel characteristics such as voltage, current, and temperature by integrally forming a sensing resistor on the auxiliary electrode, thereby enabling accurate and efficient panel control.

In addition, the light emitting device according to the present invention can simplify the production process and reduce the complexity of the external circuit by omitting the process of constructing the sensing resistor with the auxiliary electrode integrated type, thereby forming an external sensing resistor.

According to the present invention, there is provided a conductor capable of additionally supplying a negative charge or a positive charge to a portion where luminance is decreased in the light emitting device, thereby concentrating the charge which has not been used for light emission in the luminance reduction portion, So that the non-uniformity of the luminance can be improved.

1 is a plan view of a conventional light emitting device.
2 is a plan view of a light emitting device according to the present invention.
3 and 4 are plan views of the first electrode of the present invention.
5 is a plan view of a power supply unit according to the present invention.
6 is a cross-sectional view taken along line A-A 'in Fig.
7 is a cross-sectional view taken along the line B-B 'in FIG.
8 is a cross-sectional view taken along the line C-C 'in FIG.
FIG. 9 shows a state in which the power supply unit according to the present invention is disposed on the first electrode.
10 is an exemplary view showing an auxiliary electrode formed in an organic electroluminescent device according to the present invention.
11 is an enlarged view of a portion A in Fig.
12 is an exemplary view showing an example of connection with a circuit part.
13 is an exemplary diagram showing a modification of the configuration and configuration of the sensing resistor.
14 is an exemplary diagram showing an example in which the external circuit portion is a current control portion.
FIG. 15 is a view for explaining the operation of the circuit part by the silver sensing resistor, and is an example of an equivalent circuit for the sensing resistance and the panel resistance. FIG.
16 is an exemplary diagram for explaining current control using a sensing resistor according to the first embodiment of the present invention.
17 is an exemplary diagram showing a current control section of the second embodiment.
18 is an exemplary diagram showing an example of the configuration of a current control unit by temperature according to the third embodiment.
FIG. 19 is a configuration diagram showing a current control unit provided with a protection circuit according to the fourth embodiment. FIG.
20 is a view showing an insulating portion, a light emitting portion, and a second electrode in the present invention.
21 is a cross-sectional view taken along the line D-D 'in Fig. 5
22 is a cross-sectional view of E-E 'in Fig. 5
23 is a view of a light emitting device on which a conductor is mounted.
24 is a sectional view taken along the line F-F 'in Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals refer to like elements throughout. The same reference numerals in the drawings denote like elements throughout the drawings.

2 is a schematic view showing a form of a light emitting device according to an embodiment of the present invention. The light emitting device according to the present invention is preferably composed of an organic light emitting diode.

The light emitting device 200 according to the present invention includes a substrate 210, a first electrode unit 220, an auxiliary electrode unit 330, an insulating unit 230, a light emitting unit 240, and a second electrode unit 250 .

The light emitting unit 240 may include an organic light emitting unit. Hereinafter, the light emitting unit 240 will be described as an organic light emitting unit.

The substrate 210 may be a transparent substrate or an opaque substrate. In addition, the substrate 210 may be made of a flexible material having flexibility.

The substrate 210 may be an insulating substrate made of glass, quartz, ceramics, plastic, or the like. The substrate 210 may be divided into a light emitting region and a pad region.

The substrate 210 may have a polygonal shape, a circular shape, an elliptical shape, a star shape, an arbitrary curved shape, or the like. The first electrode unit 220 is formed on the substrate 210.

The first electrode unit 220 may be formed by depositing or coating a conductive material on the substrate 210.

The first electrode unit 220 may include an opaque metal material such as calcium (Ca), barium (Ba), magnesium (Mg), silver (Ag), copper (Cu), aluminum As shown in FIG.

The first electrode unit 220 may be formed of a transparent conductive material such as indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), or In ₂ O ₃ Indium Oxide) or the like. For example, the first electrode unit 220 is made of ITO.

The first electrode unit 220 is a (+) electrode which is a hole injection electrode. Meanwhile, as will be described later, the second electrode unit 250 is a (-) electrode which is an electron injection electrode.

The light emitting unit 240 includes an emissive layer that emits light as a result of recombination of electron-hole pairs.

The light emitting unit 240 may include at least one of a hole injecting layer, an electron injecting layer, a hole transporting layer, and an electron transporting layer. Film.

In the case of including both of them, a hole injection layer is disposed on the first electrode portion 220 which is an anode, and a hole transporting layer, a light emitting portion, an electron transporting layer, and an electron injecting layer are sequentially stacked thereon.

Meanwhile, the second electrode unit 250 is formed on the light emitting unit 240. The second electrode part 250 may be stacked on the insulating part 230 such that the second electrode part 250 does not protrude from the protruding part 231 of the insulating part 230 in the first area 221 of the first electrode part 220.

 The second electrode portion 250 is stacked on the second region 222 of the first electrode portion 220 out of the insulating portion 230.

The second electrode unit 250 may include an opaque metal material such as calcium (Ca), barium (Ba), magnesium (Mg), silver (Ag), copper (Cu), aluminum As shown in FIG.

The second electrode unit 250 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide). For example, the second electrode unit 250 is made of aluminum.

When the light emitting device 200 emits light in one plane, either the first electrode unit 220 or the second electrode unit 250 is formed of a transparent electrode. When the light emitting device 200 emits light on both sides The first electrode unit 220 and the second electrode unit 250 are both formed of transparent electrodes.

The auxiliary electrode unit 300 is disposed on the first electrode unit 220 and divides the first electrode unit 220 at predetermined intervals.

As shown in FIG. 2, the auxiliary electrode unit 300 is provided in the form of a wiring through which a current can flow. As shown in the drawing, the auxiliary electrode unit 300 is disposed on the first electrode unit 220 in the form of a mesh .

In addition to the mesh, the auxiliary electrode unit 300 may be formed in a stripe shape, and may be formed of various geometric shapes, and may be formed of numbers, symbols, characters, flowers, or other patterns.

Depending on the shape of the auxiliary electrode unit 300, the light emitting device 200 can display pictures, figures, letters, numbers, and the like using light emission or non-light emission areas.

The auxiliary electrode unit 300 is electrically connected to the first electrode unit 220 and is made of a material having a lower specific resistance than the first electrode unit 220.

The auxiliary electrode unit 300 is preferably made of a reflective material. Specifically, the auxiliary electrode unit 300 may include at least one of lithium (Li), calcium (Ca), lithium fluoride / calcium LiF / Ca, lithium fluoride / aluminum LiF, , Magnesium (Mg), gold (Au), or the like.

However, the present invention is not limited thereto. Any material that reflects light and has a relatively high electric conductivity compared to the first electrode unit 220 can be used as the material of the auxiliary electrode unit 300.

The auxiliary electrode unit 200 formed in various shapes on the first electrode unit 220 can display a specific pattern or shape during light emission to enhance a sense of beauty and at the same time the current flowing in the first electrode unit 220 is uniformly uniform Helping them to get better.

That is, the auxiliary electrode unit 300 compensates for the relatively low electrical conductivity of the first electrode unit 220, and thus the brightness of the light emitted by the light emitting unit 240 of the light emitting device 200 is entirely uneven prevent.

The transparent conductive materials used as the material of the first electrode part 220 have a relatively high resistivity as compared with the metal.

Therefore, as the area of the first electrode unit 220 is wider, the current flowing through the first electrode unit 220 is less uniform as a whole.

That is, when light is emitted from the light emitting unit 240 formed between the first electrode unit 220 and the second electrode unit 250 without the auxiliary electrode unit 300, Emitting portion 240 corresponding to a rim portion of the first electrode portion 220 and a portion of the first electrode portion 220 corresponding to a center portion of the first electrode portion 220, Light of low luminance is emitted from the light source 240.

Particularly, as the area of the first electrode unit 220 becomes wider, the overall brightness becomes uneven.

It is preferable that the auxiliary electrode unit 300 is provided in the form of a wiring which crosses or connects with each other in various directions.

The insulating portion 230 covers the auxiliary electrode portion 300 to prevent conduction between the auxiliary electrode portion 300 and the second electrode portion 250.

For this, the shape of the insulating part 230 may be formed to correspond to the auxiliary electrode part 300.

3 and 4, a portion of the first electrode portion 220 disposed on the substrate 210 is removed along the line 220a.

For example, laser scribing may be used as a method of removing a part of the one-electrode part 220 along the line 220a.

A portion of the first electrode portion 220 is removed along the line 220a so that the first electrode portion 220 is divided into a first region 221 and a second region 222 insulated from each other It is divided.

The first region 221 and the second region 222 are alternately formed along the periphery of the first electrode unit 220.

In the figure, three first regions 221 and four second regions 222 are formed on the short side of the first electrode unit 220.

In addition, five first zones 221 and six second zones 222 are formed on the long side of the first electrode unit 220. Although the first areas 221 are electrically connected to each other, the second areas 222 are electrically separated from each other.

A first power source is connected to the first zone 221 and a second power source is connected to the second zone 222.

For example, when a positive power source is connected to the first zone 221, a negative power source is connected to the second zone 222, and when a negative power source is connected to the first zone 221, 222 are connected to two power sources.

A dummy region 223 in which the first region 221 and the second region 222 are not disposed is disposed at an edge portion of the first electrode unit 220.

In addition, in the portion adjacent to the dummy region 223, the same kind of region is disposed between the first region 221 and the second region 222.

In FIG. 3, the second zone 222 is disposed at a portion adjacent to the dummy region 223.

4 shows that the (+) power source of the current supply device (see FIG. 5) will be supplied to the first zone 221 and the (-) power source will be supplied to the second zone 222 .

5 is a plan view showing a current supply device that functions as a power supply unit according to an embodiment of the present invention.

The current supply device 100 includes a first power supply unit 111, a second power supply unit 112, a first power supply unit 120, a second power supply unit 130, a resistance unit 140, do.

The first power supply unit 111 supplies a first power source, for example, (+) power source to the first power source unit 120.

The second power supply unit 112 supplies a second power supply, for example, (-) power supply to the second power supply unit 130.

The first power supply unit 121 includes a first power supply line 121 electrically connected to the first power supply unit 111 and a plurality of first power supply lines 121 branched along the first power supply line 121. [ And a pad 122. As shown in FIG. 2, (+) power may be supplied to the first connection pad 122.

The insulating frames 150a and 150b may be formed in a thin plate shape and may have a central portion 150a positioned at the center and a peripheral portion 150b disposed along the periphery of the central portion 150a.

The central portion 150a may have a polygonal shape. 5, the central portion 150a has a rectangular shape, and the peripheral portion 150b has a rectangular shape along the periphery of the central portion 150a.

The central portion 150a may be made of the same material as or different from the peripheral portion 150b. In addition, the central portion 150a may be an empty space. In FIG. 5, the center portion 150a is shown as forming an empty space.

The first power supply line 121 may be disposed along the peripheral portion 150b on the peripheral portion 150b. The first power supply line 121 may have, for example, a circular, elliptical or polygonal annular shape.

In Fig. 5, the first power supply line 121 is shown as having a substantially quadrangular annular shape. In FIG. 5, the first power supply line 121 is formed as a closed figure, but it can also be formed as a ring-shaped open figure.

The first connection pad 122 is branched along the first power supply line 121. The first connection pad 122 is composed of a plurality and may be branched toward the center portion 150a or branched to the opposite side of the central portion 150a.

 In Fig. 5, the first connection pad 122 is shown branched toward the center portion 150a. The end of the first connection pad 122 may protrude from the peripheral portion 150b and extend to the central portion 150a. A contact portion may be formed at an end of the first connection pad 122.

The second power supply unit 131, 132, and 130 may include a second power supply line 131 electrically connected to the second power supply unit 112, a plurality of second connections branched along the second power supply line 131, And a pad 132.

As shown in Fig. 5, (-) power can be supplied to the second connection pad 132. [

The second power supply line 131 may be disposed along the peripheral portion 150b under the peripheral portion 150b. The second power supply line 131 may be disposed along the first power supply line 121 while being insulated from the first power supply line 121 by the peripheral portion 150b. The second power supply line 131 may have a circular shape, an elliptical shape, or a polygonal shape, for example.

In Fig. 5, the second power supply line 131 is shown as having a substantially quadrangular annular shape. In FIG. 5, the second power supply line 131 is formed as a closed figure, but it is also possible that the second power supply line 131 is formed as a ring-shaped open figure.

The second power supply line 131 is disposed along the lower portion of the first power supply line 121 with the peripheral portion 150b interposed therebetween. Thus, by overlapping with the first power supply line 121, Only a part of the power supply line 131 is shown.

The second connection pad 132 is branched along the second power supply line 131. The plurality of second connection pads 132 may be branched and branched toward the center portion 150a or may be branched to the opposite side of the central portion 150a.

In Fig. 5, the second connection pad 132 is shown branched toward the center portion 150a. The end of the second connection pad 132 may protrude from the peripheral portion 150b and extend to the central portion 150a. A contact portion may be formed at the end of the second connection pad 132.

The first connection pad 122 and the second connection pad 132 may be alternately arranged. A negative power is supplied to the first connection pad 122 and a negative power is supplied to the second connection pad 132 so that the positive power supply and the negative power supply are alternately supplied along the ring shape .

6 is a cross-sectional view taken along the line A-A 'in the current supply device of FIG.

A peripheral portion 150b of the insulating frame 150 is positioned between the first power supply line 121 and the second power supply line 131. [

A first coating layer 101 for protecting the first power supply line 121 may be disposed on the first power supply line 121. A second coating layer 102 for protecting the second power supply line 131 may be disposed below the second power supply line 131.

7 is a cross-sectional view taken along the line B-B 'in the current supply device of FIG.

A peripheral portion 150b of the insulating frame 150 is positioned between the first power supply line 121 and the second power supply line 131. [

A through hole 151 is formed in the peripheral portion 150b. The through hole 151 is a passage through which the first connection pad 122 connected to the first power supply line 121 extends.

 The first connection pad 122 may extend along the lower portion of the insulating frame 150 through the through hole 151 formed in the peripheral portion 150b.

A first coating layer 101 for protecting the first power supply line 121 may be disposed on the first power supply line 121. A second coating layer 102 for protecting the second power supply line 131 may be disposed below the second power supply line 131.

The second coating layer 102 may be shorter than the first coating layer 101 and the peripheral portion 150b to expose the lower surface of the first connection pad 122. [

8 is a cross-sectional view taken along the line C-C 'in the current supply device of FIG.

A peripheral portion 150b of the insulating frame 150 is positioned between the first power supply line 121 and the second power supply line 131. [

The second connection pad 132 is connected to the second power supply line 131 and is supplied with current from the second power supply line 131.

A first coating layer 101 for protecting the first power supply line 121 may be disposed on the first power supply line 121.

A second coating layer 102 for protecting the second power supply line 131 may be disposed below the second power supply line 131. The second coating layer 102 may be shorter than the first coating layer 101 and the peripheral portion 150b to expose the lower surface of the second connection pad 132. [

As described above, the current supplying device 100 according to the embodiment of the present invention includes a first connection pad 122 for supplying a (+) power source along the peripheral portion 150b of the insulating frame 150, (+) Power supply and (-) power supply are alternately supplied with a simple structure by alternately forming second connection pads 132 for supplying power.

FIG. 9 shows a state where the current supply device 100 is placed on the first electrode unit 220. FIG.

Here, a first connection pad 122 connected to the first power supply line 121 is disposed in a first region 221 of the first electrode unit 220, and the first electrode unit 220 The first connection pad 132 is connected to the second power supply line 131. The first connection pad 132 is connected to the second power supply line 131,

Accordingly, a positive power may be applied to the first zone 221, and a negative power may be applied to the second zone 222.

10 is an exemplary view illustrating an auxiliary electrode unit formed in the light emitting device according to the present invention.

10, the auxiliary electrode unit 300 of the light emitting device according to the present invention includes a power receiving unit 310, a wiring unit 320, and a sensing resistor unit 340.

The receiver 310 is connected to the transparent electrode and transmits power supplied from the outside to the wiring 320.

In the receiver 310, at least one sensing resistor 340 is formed as shown in FIG. The power receiver 310 is formed substantially parallel to each side of the transparent electrode, and is formed in the shape of a closed tetragonal ring spaced a certain distance from each side.

Specifically, the power receiver 310 includes first to fourth receiving lines 311: 311a to 311d. The first receiving line 311a and the third receiving line 311c are formed on the transparent electrode so that the second receiving line 311b and the fourth receiving line 311d are parallel to each other. Both ends are physically connected to the termination of the adjacent receiving line 311.

Also, the receiving line 311 may have a protrusion 331 and a recess 332 as shown in FIG. The protrusions 331 and the recesses 332 are alternately formed in the direction in which each side of the transparent electrode is viewed, that is, on the side of the water receiving line on the non-wiring area side.

The protrusion 331 and the recess 332 formed in the power receiver 310 are formed for connection with the external power supply line and the protrusion 331 is directly connected to the power supply line of the first power supply together with the transparent electrode .

Here, the concave portion 332 may be used for connection with the external power supply line, and the convex portion 331 and the concave portion 332 may not be formed, but the present invention is not limited thereto.

Hereinafter, it is assumed that the protrusion 331 is directly connected to the power supply line of the first power source, and the first power source is a positive power source.

In addition, the receiver 310 is formed on the transparent electrode by a process such as photolithography or printing, using a metal of a material superior to that of a transparent electrode such as gold or silver.

The wiring portion 320 is formed in a net shape so as to connect the power receiving portions 310 to the inner region 415 closed by the power receiving portion 310. The wiring portion 320 serves to uniformly deliver the first power supplied through the power receiver 310 to the entire region of the transparent electrode.

The wiring portion 320 connects the first wiring 321 connecting the first receiving line 311a and the third receiving line 311c and the second receiving line 311b connecting the fourth receiving line 311d And the first wiring 321 and the second wiring 322 are physically connected to each other at an intersection point.

In FIG. 10, the interconnection portions 320 are formed in the inner region 415 by the vertical (first wiring) line and the horizontal (second wiring) line. However, the present invention is not limited thereto , And may be formed in various shapes.

In addition, the wiring portion 320 is used as a measurement variable of the circuit portion together with the sensing resistor portion 340. More specifically, the wiring portion 320 disposed between the sensing resistors 341a to 343b of the sensing resistor portion 340 of the wiring portion 320 is equalized with the sensing resistor 34n together with the sensing resistor 34n, Is used for control.

 This will be described in more detail with reference to the other drawings.

The sensing resistor 340 functions as a terminal formed in the power receiver 310 and connected to the circuit unit, and also serves as a measurement variable, for example, a resistance value.

Specifically, the control unit measures at least one of resistance, current, and voltage of the wiring part 320 connecting the resistance value of the sensing resistor part 340 and the sensing resistor 34n, In the invention, the electric field, the electric potential, the charge density, the voltage and the electric power are included, and the electric balance is hereinafter referred to as an electric balance) is grasped and control is performed to control the brightness of the panel to be uniform.

The configuration of the controller and the method of using the sensing resistor 340 will be described in more detail below.

To this end, the sensing resistor unit 340 includes at least one sensing resistor 34n, and each sensing resistor 34n is formed on the power receiver 310 that connects the region to be measured with the shortest distance.

10 shows an example in which the first to third sensing resistance pairs 341, 342 and 343 are formed. The circuit portion connected to each sensing resistance pair 341, 342 and 343 includes a pair of sensing resistors 34n in the shortest distance are detected and reflected in the control.

Specifically, the control unit controls the driving of the panel by detecting the current flowing through the panel or the temperature of the panel. At this time, the control unit uses the setting resistor for current or temperature detection.

This setting resistance may be a value of one sensing resistor 34n. Or the setting resistance may be the sum of equivalent resistance values of the transparent electrode between the sensing resistance pairs 341, 342, and 343 and the sensing resistance pairs 341, 342, and 343 and the auxiliary electrode unit 300. This will be described in more detail below with an example of a specific control unit.

The panel control by the setting resistors may be performed by operating the circuit portions connected to the sensing resistors 34n individually or by operating the circuit portions connected to the sensing resistors 34n in conjunction with each other.

The control unit may be connected to one of the sensing resistances forming the phase, and may be connected to each sensing resistance pair (341, 342, 343).

The circuit portions connected to the respective sensing resistance pairs 341, 342, and 343 may be configured to have different circuit configurations and operation characteristics, and thus the present invention is not limited thereto.

In addition, the setting resistance means the sum of the resistance value and the equivalent resistance value of a single sensing resistance or sensing resistance pair, but it may be considered as one resistance in the circuit analysis, etc. Hereinafter, We will proceed with the explanation.

For this reason, each pair of sensing resistors 341, 342, and 343 is formed on the power receiver 310 such that the pair of sensing resistors have the shortest distance from each other.

10, a sensing resistor 341 is formed in the first and second receiving lines 311a and 311c, which are relatively close to each other. Here, the position of the sensing resistor is not necessarily limited to the first and third receiving lines 311a and 311c.

 The sensing resistance may be formed on the second reception line 311b and the fourth reception line 311d, but in this case, the measurement value may become inaccurate.

10, the shape of the protrusion 331a formed with the sensing resistor 34n may be different from that of the protrusion 331 of the power receiver 310, ).

Fig. 11 is an enlarged view of a portion A in Fig. 10, and Fig. 12 is an exemplary view showing an example of connection with a circuit portion. 13 is an exemplary diagram showing a modification of the configuration and configuration of the sensing resistor.

11 to 13, the protrusion 331a of the portion where the sensing resistor 342 is formed is formed in a different shape from the protrusion 331 of the other protrusion. The projection 331 of the other portion is formed so that the line width of the receiving line 311 is widened. On the other hand, the protrusion 331a of the portion where the sensing resistor 342 is formed includes the first extension portion 333 and the second extension portion 334.

The first extending portion 333 extends from the receiving line 311 in the direction of the panel and the second extending portion 334 is formed in the direction parallel to the receiving line 311 at the end of the first extending portion 333 do. The first extending portion 333 and the second extending portion 334 are continuously formed without being physically continuous.

Unlike the first extended portion 333, the second extended portion 334 and the other protruded portion 331 between the power receiving lines by the first extended portion 333 and the second extended portion 334, Space 335 is formed. A portion of the water receiving line 311, which is parallel to the second extending portion 334, is narrower in line width than the other portions.

Meanwhile, the sensing resistor 342 is formed in the electrode exposing portion 335 so that one end of the sensing resistor 342 is connected to the receiving line 311. In addition, the shape of the sensing resistor 342 may be configured in various shapes and numbers as shown in FIG. 13, and may be formed in various forms depending on the resistance value required for the sensing resistor 342 and the connection form with the external circuit portion, and the present invention is not limited by the presented aspects.

12 shows an example in which a power supply line 381 and a signal line 382 for connection to a circuit unit are bonded. The power receiver 320 may be connected as shown in FIG. 12 by a power supply line and a power supply line 381 or a pattern.

Also, the protrusion 331a and the sensing resistor 342a may be connected by the signal line 382. [ And, although not shown, the circuit portion may be connected to the sensing resistor 342 in the form of a chip on board (COB), thereby not limiting the present invention.

14 is an exemplary diagram showing an example in which the external circuit portion is a current control portion. Fig. 15 is a diagram for explaining the operation of the circuit part by the sensing resistance, and is an example of an example in which the sensing resistor and the panel are shown as equivalent circuits for resistance. 16 is an exemplary diagram for explaining current control using a sensing resistor.

14 to 16, the current control unit 350 according to the first embodiment of the present invention includes a regulator-mirror circuit 391, a current control circuit 392, and a reference voltage supply circuit 393, The setting resistance RT is connected to the regulator-mirror circuit 391.

The current control section 350 further includes a low voltage protection circuit 395 and a shutdown delay circuit 394. [

The present invention can control the current flow in the shortest distance peripheral region connecting the pair of sensing resistors 341, 342, and 343 so that the brightness of the panel can be maintained uniformly when the panel is driven.

To this end, the current controller 350 shown in FIG. 14 may be connected to the sensing resistor 34n as an external circuit part. The current controller 350 controls the current flowing through the panel to be constant by the set value RSET.

The setting value RSET is determined by the setting resistance RT connected between the ground GND and the set value RSET input terminal and the setting resistance RT is set by the current source of the mirror / And the mirror / regulator circuit 351 controls the current regulating circuit 352 by the current source to regulate the current flowing in the panel.

Therefore, the current control unit 350 is connected to any one of the sensing resistances of the sensing resistance pairs 341, 342, and 343.

The current control section 350 includes a low voltage protection circuit 395, a shutdown delay circuit 394, a reference voltage supply circuit 393, a regulator-mirror circuit 391 and a current regulation circuit 392.

The low voltage protection circuit 395 receives the panel input voltage VIN and stops the driving of the panel by controlling the current regulation circuit 392 when the panel input voltage VIN is below the operation limit voltage.

Further, the low voltage protection circuit 395 controls the current control circuit 392 in response to a request from the shutdown delay circuit 394 to stop driving the panel. To this end, the low voltage protection circuit 395 is connected to a panel power supply (not shown), receives the panel input voltage VIN, and supplies the input voltage VIN to the reference voltage supply circuit 393 and the regulator- And is connected to the current regulating circuit 392. [

The shutdown delay circuit 394 judges the interruption of the supply of the control signal EN / PWM externally and requests the low voltage protection circuit 395 to suspend the panel drive when the supply of the control signal EN / PWM is interrupted .

The reference voltage supply circuit 393 supplies a reference voltage for controlling the current regulating circuit 392 to the regulator-mirror circuit 391 by the regulator-mirror circuit 391. To this end, the reference voltage supply circuit 393 receives the panel input voltage VIN from the low voltage protection circuit 395.

The regulator-mirror circuit 391 controls the current regulating circuit 392 by the reference voltage supplied from the reference resistance supply circuit 393 and the setting resistor RT.

To this end, the regulator-mirror circuit 391 is connected to the setting resistor RT, the reference voltage supply circuit 393 and the current regulation circuit 392.

The regulator-mirror circuit 391 controls the amount of current flowing through the panel to decrease as the resistance value of the setting resistance RT increases. When the resistance value of the setting resistance RT is fixed, So as to control the current control circuit 392.

The current regulating circuit 392 operates under the control of at least one of the external control signal EN / PWM, the low voltage protection circuit 395 and the regulator-mirror circuit 391 to control the current flowing in the panel do. To this end, the current regulating circuit 392 is connected between the panel and the second power supply (or negative power supply, or GND).

The low voltage protection circuit 395 and the shutdown delay circuit 394 in the configuration of the current control section described above serve as a reference value of the current control by the regulator-mirror circuit 391 in the setting resistance RT. Do.

At this time, the setting resistance RT is determined by the sensing resistance values (RS: RS1n, RS2n, RS3n) or the sensing resistance value RS and the wiring resistance (R: R1 to R3).

15, RS11, RS12, RS21, RS22, RS31, and RS32 denote resistance values of the sensing resistor 34n, respectively. Also, R1 to R3 indicate equivalent resistances to the virtual shortest distance connecting the sensing resistor pairs 341, 342 and 343.

At this time, the setting resistor RT may be either the resistance value of the sensing resistor 34n connected to the set value input terminal or the sum of the resistance values of the resistor groups 349: 349a to 349c. More specifically, when the current controller 350 is connected to the first sensing resistor 341a of the first sensing resistor pair 341, the value of the setting resistor RT may be the resistance of the first sensing resistor 341a, The sum of the resistor 341a, the second sensing resistor 341b, and the first wiring resistance R1.

Referring to FIG. 16, the transparent electrode and the auxiliary electrode unit 300 may be equivalent to each other in such a manner that resistors having different resistance values are interdigitated and connected to each other. This is because the transparent electrode acts as a resistance component, and the flow of current becomes irregular according to the resistance component.

In this equivalent circuit, the sum of the currents flowing between the power supply (VCC) and the ground (GND) is the same at the power supply (VCC) and the ground (GND) but has different values at the measurement points S1, S2 and S3. In particular, the currents I1, I2 and I3 flowing along the imaginary line connecting S1-S1 ', S2-S2' and S3-S3 'have different values. The difference between I1, I2 and I3 causes a difference in luminance of the panel. In the present invention, the values of I1, I2 and I3 are controlled to be uniform through the sensing resistor and the current controller 350, Thereby reducing the deviation.

The current control unit 350 may be configured for each of the first to third resistance groups 349 corresponding to S1-S1 ', S2-S2', and S3-S3 '. The current controller 350 connected to each of the resistor groups 349 detects the current flowing through each of the resistor groups 349 through the setting resistor RT so that the currents I1- I3.

That is, the current control section 350 controls the resistor group 349 in which the currents I1 to I3 flow less and the resistance group 349 in which the currents I1 to I3 flow excessively, Is supplied. Specifically, in the case of FIG. 5, when the current detected through the setting resistor RT increases, the current regulator 352 operates so that the amount of current flowing through the panel decreases. When the detected current decreases, The current regulator 352 is operated so as to increase.

In particular, the current controller 350 controls the currents flowing in the respective resistor groups 349 individually by controlling the current controller 350 connected to the respective resistor groups 349 so that the virtual equivalent of the respective resistor groups 349 By maintaining the luminance of the region constant, the luminance of the entire panel can be uniformly adjusted. Accordingly, the amount of current flowing in the front panel is uniformly adjusted, thereby reducing the luminance deviation of the panel and improving the luminance uniformity.

The value of the setting resistor RT in the current controller 350 is set to a wiring portion 320 connecting a pair of sensing resistors RS11-RS12, RS21-RS22, and RS31-RS32 and a pair of sensing resistors 34n, (R1, R2, R3) of the resistors R1, R2, R3. Or the setting resistance RT may be a value (RS11, RS12, RS21, RS22, RS31, RS32) of the sensing resistor 34n engaged with the current controller 350.

That is, three groups of current control units 350 may be configured in the panel having the auxiliary electrode unit 300 of FIG. 10, and the set resistance values of the current control units 350 may be RS11, RS21, RS31, RS12, RS22, RS32 or RS11 + R1 + RS12, RS21 + R2 + RS22, RS31 + R3 + RS32.

17 is an exemplary diagram showing a current control unit according to the second embodiment.

Referring to FIG. 17, the current control unit according to the second embodiment includes switching elements SW1, SW2, and SW3, comparators OP1, OP2, and OP3, and a constant current source (IR or constant voltage source).

The first input terminal of the comparator OP is connected to one end of the setting resistor RT, and the second input terminal thereof is connected to the constant current source IR. Further, the output terminal of the comparator OP is connected to the base terminal B of the switching element.

The collector terminal C of the switching element is connected to the output terminal of the panel EL and the base terminal B is connected to the output terminal of the comparator OP and the emitter terminal E is connected to the ground GND. Here, the panel EL may be understood as collectively referred to as a first electrode unit, an auxiliary electrode, a second electrode unit, and a light emitting unit, and the connection may be made with any one of them. These matters are also applied to the following description.

One end of the setting resistor RT is connected to the input terminal of the comparator OP and the other end is connected to the output terminal of the panel EL and the collector terminal C.

Specifically, the current IRT flowing through the setting resistor RT is set to the first input of the comparator OP and the reference current ir supplied from the constant current source IR is input to the second input of the comparator OP do. Then, the comparator OP compares the first input with the second input to control the switching element SW, thereby controlling the currents I1, I2, and I3 flowing through the respective equalization areas.

As described above, the current control section of the second embodiment adjusts the amount of current flowing through the switching element by comparing the current applied to the setting resistance RT with the current of the constant current source, controlling the switching element by the comparison value, So that the current applied to the auxiliary electrode unit 300 is controlled.

18 is an exemplary diagram showing a configuration example of a current control unit according to the third embodiment.

Referring to Fig. 18, the current control unit according to the third embodiment includes a first resistor RA setting resistor RT, a comparator OP4, a constant voltage source VR, and a switching device SWM.

The current control unit according to temperature controls the brightness of the panel by controlling the current supplied to the panel by configuring the sensing resistor 34n as a resistance whose resistance value changes according to temperature.

To this end, the current control unit according to the temperature includes a first resistor (RA) setting resistor (RT), a comparator (OP4), a constant voltage source (VR), and a switching device (SWM).

The first resistor RA is connected at one end to the power source VCC and the other end is connected to one end of the setting resistor RT and the input terminal of the comparator OP. Here, one end of the first resistor RA and the set resistor RT may be input to the negative input terminal of the comparator OP, but the present invention is not limited thereto.

One end of the setting resistor RT is connected to the ground GND and the other end is connected to the other end RT of the first resistor RA and the input terminal of the comparator OP. Further, the positive electrode (+) of the constant voltage source VR is connected to another input terminal of the comparator OP, for example, a positive input terminal. The output terminal of the comparator OP is connected to the gate terminal of the switching element SWM. The comparator OP compares the both ends of the setting resistor RT with the voltage of the constant voltage source VR and adjusts the current flowing through the switching element SWM according to the result of the comparison, .

The switching element SWM has a gate terminal connected to the output terminal of the comparator OP, a source terminal S connected to the ground GND and a drain terminal D connected to the output terminal of the panel.

The current control unit is also connected to each of the resistance groups as in the above-described current circuits to control currents I1 to I3 for each resistance group, thereby adjusting the brightness of the panel.

FIG. 19 is a configuration diagram showing a protection circuit according to a fourth embodiment of the present invention. FIG.

Referring to Fig. 19, the protection circuit includes a setting resistor RT, a second resistor RR, a comparator OP and a switching element SW.

One end of the setting resistor RT is connected to the power source VCC together with the collector terminal of the switching element. The other end of the setting resistor RT is connected to one end of the panel EL input terminal and the second resistor RR.

One end of the second resistor RR is connected to the input terminal of the panel EL and the setting resistor Rt and the other end is connected to the first input terminal of the comparator OP.

The collector terminal C of the switching element SW is connected to the power source VCC and the base terminal B is connected to the output terminal of the comparator and the emitter terminal E is connected to the ground GND and the comparator SW And fed back to the second input terminal. The comparator compares the current of the feedback emitter terminal (E) with the current through the setting resistor (RT) and controls the switching element (SW) according to the comparison result.

The protection circuit prevents the panel (EL), in particular, the light emitting portion from being damaged by a short circuit, an overvoltage or an overcurrent.

20 shows an insulating portion 230 disposed on the first electrode portion 220. As shown in FIG.

The insulating portion 230 may be formed in a frame shape having, for example, a closed space.

In addition, the insulating portion 230 may have a concavo-convex pattern including a plurality of protrusions 231 and a concave portion 232 along its outer rim.

The insulating portion 230 may be formed by applying a photo resist solution.

The protrusion 231 of the insulation 230 may be located on the first area 221 of the first electrode 220 as shown in Figure 1, (220) is separated from the second electrode part (250) by the insulating part (230).

The insulating part 230 includes a first insulating part 233 for covering and insulating the power receiving part 310 of the auxiliary electrode part 300 and a second insulating part 233 for covering and insulating the wiring part 320 of the auxiliary electrode part 300. [ 2 insulating portion 234. [0041]

The first insulation portion 233 is provided in a frame shape corresponding to the shape of the power receiver 310 and the second insulation portion 234 is provided in a wiring shape corresponding to the shape of the wiring portion 320 do.

It is preferable that the thicknesses of the first insulating portion 233 and the second insulating portion 234 are formed larger than the thickness of the power receiver 310 and the wiring portion 320, .

The light emitting unit 240 is positioned on the first electrode unit 220 (see FIG. 3), the auxiliary electrode unit 300 (see FIG. 10), and the insulating unit 230.

The light emitting unit 240 may be partially overlapped with the insulating member 230 and may not be stacked on the second region 222 (see FIG. 3/4).

For this, the outer edge of the light emitting unit 240 is preferably arranged so as not to deviate from the outer edge of the insulation unit 230.

The light emitting unit 240 may include a red light emitting material, a green light emitting material, or a blue light emitting material.

As described above, the light emitting unit 240 includes a low molecular organic material or a polymer organic light, and has an emissive layer that emits light as a result of recombination of electron-hole pairs.

The light emitting unit 240 may further include at least one of a hole injecting layer, an electron injecting layer, a hole transporting layer, and an electron transporting layer .

The second electrode unit 250 is disposed on the light emitting unit 240.

The outermost edge of the second electrode unit 250 may be connected to the insulation 230 so as not to deviate from the outermost edge of the protrusion 231 of the insulation unit 230. In this case, Lt; / RTI >

In the second region (see FIG. 3/4, 222), the second electrode portion 250 is deposited on the first electrode portion (see FIG.

The second electrode unit 250 may be formed of an opaque metal material such as calcium (Ca), barium (Ba), magnesium (Mg), silver (Ag), copper (Cu) Alloy.

The second electrode unit 250 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide). For example, the second electrode unit 250 is made of aluminum.

When the light emitting device 200 emits light on one side, either one of the first electrode unit 220 and the second electrode unit 250 is formed of a transparent electrode, and the light emitting device 200 emits double- The first electrode unit 220 and the second electrode unit 250 are both formed of transparent electrodes.

The second electrode unit 250 is formed on the organic light emitting unit 240.

In the first zone 221, the second electrode unit 250 may be stacked on the insulation 230 such that the second electrode unit 250 does not protrude from the protrusion 231 of the insulation unit 230.

In the second region 222, the second electrode portion 250 is deposited on the first electrode portion 220 out of the insulation portion 230.

The second electrode unit 250 may be formed of an opaque metal material such as calcium (Ca), barium (Ba), magnesium (Mg), silver (Ag), copper (Cu), aluminum As shown in FIG.

 The second electrode unit 250 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide). For example, the second electrode unit 250 is made of aluminum.

FIG. 21 shows a cross section taken along the line D-D 'in the light emitting device 200 of FIG. 2, and FIG. 22 shows a cross section taken along the line E-E' of the light emitting device 200 of FIG.

Referring to FIGS. 21 and 22, the auxiliary electrode unit 300 is disposed on the first electrode unit 220.

Here, the width of the wiring part 320 constituting the auxiliary electrode part 300 is preferably about 50 to 250 μm. The distance between the wiring part 320 of the auxiliary electrode part 300 and the other wiring part 320 is preferably 300 to 600 μm.

If the distance between the wiring part 320 and the wiring part 320 becomes too narrow, the current density in the light emitting part 240 adjacent to the wiring part 320 may be increased to overheat.

Therefore, preferably, the interval between the wiring and the wiring is made larger than the width of the wiring.

The sensing resistor unit 341a protrudes from both sides of the auxiliary electrode unit 300 and may be connected to the controller (not shown).

Meanwhile, the auxiliary electrode unit 300 may be covered by the insulation unit 230. The insulating portion 230 serves to insulate the auxiliary electrode portion 300 and the second electrode portion 250 from each other.

The insulating portion 230 is preferably made of an inorganic material made of a material such as silicon oxide or silicon nitride. However, the material is not limited thereto, and may be composed of various kinds of inorganic materials or organic materials.

However, if the insulation between the auxiliary electrode unit 300 and the second electrode unit 250 is ensured even without the insulation layer 230, the insulation layer 220 may be omitted.

For example, the light emitting unit 240 may be disposed between the auxiliary electrode unit 300 and the second electrode unit 250 to serve as an insulating unit.

In this case, a separate insulating layer may be omitted on the auxiliary electrode unit 300.

21, the (+) power source supplied to the first electrode unit 220 on the outer peripheral part of the light emitting device 200 is connected to the first electrode unit 220 along the inner first electrode unit 220, Emitting portion 140 in contact with the light-emitting portion 220.

The first electrode unit 220 to which positive (+) power is supplied becomes the first region (see FIG. 3/4, 221).

The first electrode part 220 is in contact with the light emitting part 240 but not in contact with the second electrode part 250 in the first area 221 of FIG.

This is because the insulating portion 230 is positioned between the first electrode portion 220 and the second electrode portion 250.

22, a negative (-) power source supplied to the first electrode unit 220 on the outer circumferential portion of the light emitting device 200 is connected to the second electrode unit 250 ).

The negative (-) power supplied to the second electrode unit 250 is transmitted to the light emitting unit 240, which is in contact with the second electrode unit 250.

22, the first electrode unit 220 located at both ends and the first electrode unit 220 located at the middle are electrically separated from each other.

3, which is a boundary between the first zone 221 and the second zone 222 to electrically separate the first zone 221 and the second zone 222 from each other, Electrode part 220 along the line 220a.

The insulation part 230 is laminated on the removed part of the first electrode part 220 to reinforce insulation.

22, the first electrode part 220 at both ends becomes the second area 222, the first electrode part 220 in the middle becomes the first area 221, The first zone 221 and the second zone 222 are electrically separated from each other.

The first electrode part 220 is in contact with the second electrode part 250 and does not contact the organic light emitting part 240 in the second area 222. [

As described above, the (+) power source and the (-) power source which are transmitted to the first electrode unit 220 are respectively transmitted along the first electrode unit 220 and the second electrode unit 250, A current flows along the electrode unit 220, the light emitting unit 140, and the second electrode unit 250.

21 and 22, a current is supplied by the (+) power source along the auxiliary electrode unit 200. This current is supplied to the first electrode unit 220 by the auxiliary electrode unit 200, And is smoothly transmitted from its outer edge to its center.

The difference in amount of current between the rim portion of the first electrode portion 220 and the center portion thereof can be remarkably reduced by the action of distributing or transferring the current by the auxiliary electrode portion 300.

Therefore, the difference in brightness between the edge portion and the center portion of the light emitting portion 240 can be remarkably reduced.

FIG. 23 and FIG. 24 show a configuration for controlling the luminance of a specific region in the light emitting device according to the present invention.

The configuration of the power supply device 100 and the structure of the panel (the substrate, the first electrode, the auxiliary electrode, the insulating portion, and the second electrode) shown in Figs. 23 and 24 are the same as those described above, and a detailed description thereof will be omitted .

A conductor 400 is provided on the upper part of the panel of FIG. 23. The conductor 400 is provided to face the second electrode part 250 and is disposed opposite to the power source applied to the second electrode part 250. Polarity.

The conductor 400 is disposed at a distance from the central portion of the panel by a predetermined distance from both sides of the central portion.

Here, the conductor disposed at the central portion of the panel is denoted by 400b, and the conductors disposed at both sides of the central portion are denoted by 400a and 400c.

As described later, the conductor 400 supplies a charge having a polarity opposite to that of the charge emitted from the second electrode unit 250, thereby increasing the luminance at the portion corresponding to the portion where the conductor 400 is located You can.

That is, since the current flowing in both the center portion and the center portion of the panel is smaller than the other portions, the luminance is lowered. Therefore, it is possible to prevent deterioration of the luminance and reduce the luminance The conductor 400 is disposed at a portion of the conductor.

The concrete operation of the conductor will be described later.

The controller is connected to the first and second power supply units 111 and 112 to control power supply to the first and second power supply units.

As described above, the control unit can measure the current applied to the region (the center portion of the panel or the center portion) corresponding to the position of the sensing resistor 341a connected to the sensing resistor 341a have.

The controller may also be connected to the conductor 400 so that a part of the power supplied from the first and second power supply units 111 and 112 may be guided toward the conductor 400.

That is, if the power source supplied to the second electrode unit 250 is a negative power source, a positive power source can be supplied to the conductor 400. If the power source supplied to the second electrode unit 250 is a positive power source, 400 as shown in FIG.

 If it is determined that the current applied to the specific region (e.g., the central portion) is lower than the predetermined reference under the control of the controller 350, an additional power source of the conductor 400 located in the corresponding region is supplied, Can be minimized or prevented.

24, a cover member 260 is provided on the upper portion of the second electrode unit 250. The cover member 260 may include the conductor 400 and the conductor 400 May be exposed toward the second electrode unit 250. [0064]

An empty space may be formed between the cover member 260 and the second electrode unit 250, and a sealing material 270 may be disposed in the space.

The conductor 400 may have a certain shape and volume. The conductor 400 may be formed of a metal material such as zinc, tin, indium, cadmium, gallium, nickel, iron, cobalt, Co, tungsten, titanium, chromium, molybdenum, gold, platinum, calcium, barium, magnesium, Ag, copper (Cu), aluminum (Al), or an alloy thereof.

In addition, the conductor 400 may be formed of, for example, ITO or IZO.

The electrons emitted from the second electrode unit 250 pass through the electron injecting layer and the electron transporting layer of the light emitting unit 240, And the light is emitted.

About 30% of the electrons meet the holes in the light emitting body and do not contribute to the light emission, and pass through the hole transporting layer and the hole injecting layer.

In this embodiment, by placing the conductor 400 adjacent to the second electrode layer 250, it is possible to reduce loss of electrons that can not contribute to light emission.

The conductor 400 is charged in the opposite polarity to the second electrode layer 250 so that electrons escaping through the hole transport layer and the hole injection layer due to the electric field effect are confined to a portion adjacent to the conductor 400, And increases the probability of meeting.

Accordingly, the luminous efficiency of the light emitting device according to the present invention can be improved at the portion where the conductor 400 is located.

Particularly, when the conductor 400 is positioned at the central portion where the brightness of the panel is lowered, the brightness of the central portion can be improved. Although the conductor 400 is not the center portion of the organic light emitting element, it may be disposed at one or more arbitrary positions in the portion where the brightness is to be improved.

Hereinafter, a schematic operation of the light emitting device including the current control unit of the present invention will be described.

The current controller 350 according to the first embodiment of FIGS. 14 through 16 maintains the current flowing through the auxiliary electrode constantly for each of the resistor groups 349 according to the set resistor value RT determined by the current controller 332 Thereby adjusting the current value of the entire panel to be uniform.

Particularly, even if the current flowing through the auxiliary electrode temporarily increases, the setting resistance RT and the current adjusting circuit 332 adjust the current of a constant value to flow.

Accordingly, the current control unit 350 uniformly adjusts the amount of current flowing in the front panel, thereby reducing the luminance deviation of the panel and improving the luminance uniformity.

17 controls the switching element SW so that a current corresponding to an amount determined by the setting resistance RT flows through the auxiliary electrode unit 300 when a constant current is supplied from the power source .

 When the current supplied from the power source increases, the current control part feedbacks the current through the setting resistor RT to reduce the current flow by the switching element. On the contrary, if the current decreases, the current flow through the switching element increases, RTI ID = 0.0 > RT < / RTI >

Particularly, such a current control unit is provided for each of the resistance groups, so that the amount of current flowing through the resistance group in which a large amount of current flows is reduced and the amount of current flowing through the resistance group in which a small amount of current flows is controlled so as to control the amount of current flowing in each region of the panel to be uniform do.

As described above, the current control unit according to the third embodiment of FIG. 18 changes the resistance value of the setting resistor RT according to the temperature, and sets the voltage applied to the setting resistor RT to the constant voltage source VR The current flowing through the switching element is controlled by controlling the switching element in comparison with the voltage.

As a result, when the temperature of the setting resistor RT rises due to excessive current supplied to the panel or the auxiliary electrode unit 300, the current control unit of the third embodiment decreases the current flowing through the switching unit SWM to lower the temperature do.

When the temperature of the setting resistor RT falls, the current flowing through the switching element SWM is increased.

In this way, the current control unit controls the flow of current so that the current applied to the panel or the auxiliary electrode unit 300 is kept constant by the setting resistor RT, and at the same time, .

A short-circuit protection circuit constituting a current control unit according to the fourth embodiment shown in FIG. 19 forms a bypass B by a switching element SW when an overvoltage, an overcurrent or a short-circuit current is supplied to the panel, The overcurrent and the short-circuit current are branched, thereby preventing the panel EL from being deteriorated by the overcurrent or the short-circuit current.

As described above, the current control unit of the fourth embodiment minimizes the current flowing through the switching element SW when the current flowing through the setting resistor is constant, so that current flows through the panel or the auxiliary electrode unit 300.

On the other hand, when the voltage or current applied to the set resistor increases, the protection circuit causes the current to flow through the switching element to form the bypass, and the overcurrent is branched through the formed bypass. On the contrary, the protection circuit reduces the voltage applied to the setting resistor RT or the current flowing through the switching element when the current decreases, and controls the current supplied from the power source to be supplied to the panel or the auxiliary electrode unit 300.

23 and 24 can be applied to the control unit (current control unit) 350 of the first to fourth embodiments.

The controller 350 measures the current applied to the wiring part corresponding to the area where the sensing resistor is disposed in the wiring part of the auxiliary electrode part while the sensing part is connected to the sensing resistors.

If it is determined that the magnitude of the current in the specific region is lower than the predetermined reference value, the controller supplies the negative or positive power source to the conductor corresponding to the specific region.

That is, when the second electrode unit 250 is connected to a negative power source, a positive power source is supplied to the conductor 400. When the second electrode unit 250 is connected to a positive power source, negative power is supplied to the conductor 400 .

The conductor 400 may be freely arranged in a desired shape in a portion where brightness is to be improved in the light emitting device.

Further, when a plurality of conductors 400 are disposed, the voltage supplied to each of the conductors 400 can be configured differently.

As described above, the conductor 400 according to the present invention has a polarity different from that of the power supplied to the second electrode unit 250 and is disposed on the second electrode unit 250, 250 can be improved.

Accordingly, by disposing the conductor 400 in correspondence with the portion where the brightness is lowered in the light emitting portion, uniformity of brightness can be improved by a simple method.

Further, since the conductor 400 can be arranged in a desired position and shape in a portion where luminance is to be improved in the light emitting device, even if the shape of the light emitting device is changed, the conductor 400 can be arranged at a desired position, can do.

In addition, when a plurality of conductors 400 are disposed, a desired luminance characteristic can be realized by varying the voltage or current supplied to each of the conductors 400.

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 and scope of the invention will be.

100: Power supply unit 200: Light emitting device
210: substrate 220: first electrode
230: insulation part 240:
250: second electrode
300: auxiliary electrode 310:
311: water receiving line 320: wiring part
321: first wiring 322: second wiring
333: first extension part 334: second extension part
335: Electrode Exposed Portion 340: Sensing Resistance Portion
34n: sensing resistance 341, 342, 343: sensing resistance pair
349: resistance group 350: current control unit
381: power supply line 382: signal line
391: Regulator-mirror circuit 392: Current regulating circuit
393: Reference voltage supply circuit 394: Shutdown delay circuit
395: Low voltage protection circuit 415: Internal area
400: conductor

Claims (19)

Claims [1]
A first electrode portion disposed on the substrate;
An auxiliary electrode unit disposed on the first electrode;
A light emitting unit disposed on the auxiliary electrode unit and the first electrode unit;
A second electrode part provided in the light emitting part;
A power supply unit for supplying power to the light emitting unit through the first electrode unit, the second electrode unit, and the auxiliary electrode unit; And
And a control unit connected to the auxiliary electrode to measure a current or a voltage applied to the auxiliary electrode and to control the power supply of the power supply unit according to a measurement result. The method according to claim 1,
The auxiliary electrode includes a water receiving portion forming an outer rim;
A wiring part provided to be surrounded by the power receiver and connected to the power receiver;
And a sensing resistor provided on the power receiver. 3. The method of claim 2,
Wherein the power receiver comprises: a first extension extending in an outward direction;
A second extension extending from an end of the first extension;
And an electrode exposing part formed by the first and second extension parts,
Wherein the sensing resistor is disposed in a direction from the one side of the electrode exposed portion to the second extending portion. The method of claim 3,
And an end of the sensing resistor is spaced apart from the second extending portion. 3. The method of claim 2,
Wherein the plurality of sensing resistors are disposed on one side edge of the power receiver and the opposite side edge, respectively. 3. The method of claim 2,
Wherein the plurality of sensing resistors are disposed to be spaced apart from one another along a rim of the power receiver. The method according to claim 1,
And an insulating portion provided on the auxiliary electrode to insulate the auxiliary electrode from the light emitting portion. The method according to claim 5 or 6,
Wherein the control unit controls the power supply by comparing a current flowing through the setting resistor including the sensing resistor or a voltage applied to the setting resistor with a reference voltage or a reference current. The method of claim 8, wherein
The resistance value of the setting resistor
Wherein the sensing resistor is a sum of a resistance value of a pair of the sensing resistors formed on different edges and an equivalent resistance obtained by equalizing the auxiliary electrode between the pair of sensing resistors or a resistance value of one of the sensing resistors. 10. The method of claim 9,
Wherein the sensing resistor is a pair of the sensing resistors having the shortest distance between the sensing resistors. 10. The method of claim 9,
Wherein the control unit is a current control unit or an overcurrent protection circuit for controlling a current value applied to at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit, and the second electrode unit. 12. The method of claim 11,
Wherein the control unit is provided corresponding to each pair of the sensing resistors. 13. The method of claim 12,
Wherein the control unit is connected to at least one of the pair of sensing resistors. 12. The method of claim 11,
The current control unit
A reference voltage supply circuit for generating a reference voltage by an input voltage;
A regulator-mirror circuit which is connected to the other end of the setting resistor, which is once connected to the ground, and which generates a control signal by the reference voltage and the setting resistor; And
And a current control circuit for controlling current flow of at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit, and the second electrode unit according to the control signal. 12. The method of claim 11,
The current control unit
A comparator having a first input connected to one end of the set resistor and the other connected to a constant current source;
And a switching element having a collector terminal connected to the other end of the setting resistor, a base terminal connected to the output terminal of the comparator, and an emitter terminal connected to the ground GND. 12. The method of claim 11,
The current control unit
A first resistor having one end connected to the input power supply and the other end connected to one end of the setting resistor and a first input of the comparator;
A comparator in which the first input terminal is connected to the one end of the setting resistor and the first resistor, and the second input terminal is connected to the constant voltage source; And
The output terminal of the comparator is connected to the gate terminal, and either the source terminal or the drain terminal is connected to at least one of the first electrode unit, the auxiliary electrode unit, the light emitting unit and the second electrode unit, And a switching element connected to the ground,
And the other end of the setting resistor is connected to the ground. 17. The method of claim 16,
Wherein a resistance value of the sensing resistor varies with temperature. 12. The method of claim 11,
The overcurrent protection circuit
A switching element having a collector terminal and an emitter terminal connected to a power source and a ground, respectively;
A comparator having an output terminal connected to the base terminal of the switching device and one of the input terminals connected to the emitter terminal; And
And a second resistor having one end connected to the other input terminal of the comparator and the other end connected to one end of the setting resistor,
And the setting resistor is connected between the second resistor and the collector terminal. The method according to claim 1,
A protective cover provided on the second electrode portion;
And a conductive member provided on the protective cover and facing the second electrode unit,
Wherein the control unit is connected to the conductor and restrains a charge of a specific polarity emitted from the second electrode unit by applying a power supply having a polarity opposite to that of the power source applied to the second electrode unit to the conductor, So that the electric charge causes the electric charge of the opposite polarity to cause the light emitting action in the light emitting portion.

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