KR101952502B1 - Hybrid type oled and amoled cell using thereof - Google Patents

Abstract

A hybrid type organic light emitting diode (OLED) and an active matrix organic light emitting diode cell (AMOLED Cell) using the same are provided. A hybrid type organic light emitting diode (OLED) according to an exemplary embodiment of the present invention includes a glass substrate, a light emitting diode (LED) disposed on one side of the glass substrate to provide white light, And a diffusion plate disposed under the glass substrate for reflecting part of the white light provided from the light emitting diode and allowing the reflected white light to be emitted through the glass substrate, Wherein the RGB organic light emitting diode and the diffusion plate constitute one pixel and the diffusion plate is arranged to correspond to an empty area of the glass substrate where the RGB organic light emitting diode is not disposed in the corresponding pixel, And white light is emitted through the free area of the glass substrate.

Description

HYBRID TYPE OLED AND AMOLED CELL USING THEREOF BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a hybrid type OLED that emits white light and an AMOLED cell using the same.

Conventionally, as a method of realizing white light using organic light emitting diodes (OLED), three OLEDs (hereinafter, referred to as "RGB OLED" A method using a white OLED has been mainly used.

A method using RGB OLED has a problem that significant power is consumed because RGB must be driven to the maximum level in order to emit white light.

For reference, OLEDs emit light using an organic material. Therefore, the longer the application voltage is, the shorter the material lifetime is. In RGB OLED, RGB is driven at maximum level to emit white light, There is a problem that the lifetime is shortened as a result.

Also, the method using RGB OLED has a problem of poor color mixing when viewed from the side.

On the other hand, a method of directly using a white OLED is to use a white OLED that emits white light by laminating RGB OLEDs. In order to make white light, the order of laminating the RGB OLEDs and the blending degree of the light should be considered.

In this process, however, there is a problem of reduction in the yield - representing the ratio of the finished product to the amount of the input - and poor size.

Accordingly, in order to realize white light, it is required to increase the lifetime of the material by reducing the burden due to the size of the applied voltage by using the RGB OLED, and to solve the problem of the color mixing defect and increase the yield.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the conventional art, and it is an object of the present invention to reduce the burden due to the voltage applied when realizing white light using RGB OLEDs, And to provide a method for increasing the yield.

In order to achieve the above object, a hybrid type organic light emitting diode (OLED) according to an embodiment of the present invention includes a glass substrate, a light emitting diode (LED) disposed on one side of the glass substrate to provide white light, An RGB organic light emitting diode (OLED), which is deposited on the upper surface of the glass substrate and emits white light in combination of RGB, and a light emitting diode (OLED) disposed under the glass substrate to reflect a part of white light provided by the light emitting diode, Wherein the RGB organic light emitting diode and the diffusion plate constitute one pixel, and the diffusion plate is disposed in a space of the glass substrate on which the RGB organic light emitting diode is not disposed, So that the reflected white light is emitted through the free area of the glass substrate, The.

In order to achieve the above object, a hybrid type active matrix organic light emitting diode (AMOLED) cell according to an embodiment of the present invention includes a glass substrate, a white substrate A plurality of RGB organic light emitting diodes (OLED) which are deposited on the upper surface of the glass substrate so as to be arranged in a predetermined form and emit white light in RGB combination, and a plurality of RGB organic light emitting diodes (OLED) And a plurality of diffusing plates for reflecting a part of the white light provided by the light emitting diode and allowing the reflected white light to be emitted through the glass substrate, wherein each of the RGB organic light emitting diodes and the diffusing plate And the diffusion plates are arranged such that the respective RGB organic light emitting diodes are not arranged in the corresponding pixels Wherein the plurality of light emitting diodes (LEDs) are arranged in a plurality of rows on the glass substrate so as to correspond to a free area of the glass substrate, so that the reflected white light is emitted through a free area of the glass substrate, The white light is provided to the pixels so that the provided white light is uniformly reflected by the diffusion plate constituting each pixel.

According to one embodiment of the present invention, when implementing white light using the RGB OLED, the lifespan of the material can be increased by reducing the burden due to the voltage applied.

In addition, it is possible to solve the problem of color mixture failure and increase the yield.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

FIG. 1 is a view showing a configuration of a hybrid type OLED according to an embodiment of the present invention.
2 is a view illustrating an AMOLED cell using a hybrid OLED according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" .

Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

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

FIG. 1 is a view showing a configuration of a hybrid type OLED according to an embodiment of the present invention.

A hybrid OLED 100 according to an embodiment of the present invention includes a glass substrate 110, a white LED 120, an RGB OLED 130, (140).

The white LED 120 may be disposed on one side of the glass substrate 110. The RGB OLED 130 may be deposited on the upper surface and the diffusion plate 140 may be disposed on the lower surface.

The white light emitted from the white LED 120 disposed on one side can be transmitted from one side to the other side through the glass substrate 110.

The deposition of the RGB OLED 130 and the arrangement of the diffusion plate 140 will be described later.

Meanwhile, the white LED 120 may be disposed on one side of the glass substrate 110 and emit white light.

The white light emitted from the white LED 120 may be transmitted from one side to the other side through the glass substrate 110.

Meanwhile, the RGB OLED 130 may be deposited on the upper surface of the glass substrate 110, and a vacuum thermal deposition method may be used as the deposition method.

In the vacuum thermal deposition method, heat is applied to a crucible (not shown) in which an organic material (not shown) is contained in a powder state in a vacuum chamber (not shown), and the organic material (not shown)

The RGB OLED 130 may implement a white color by a combination of RGB as shown in FIG.

For reference, the operating principle of an OLED is that electric current flows when electric power is supplied. In the cathode, an electric field moves to a light emitting layer with the help of an electric field transport layer, and a positive hole moves to a light emitting layer with the help of a hole transport layer. .

The electric field and the holes in the organic light emitting layer generate excitons having a high energy. At this time, the excitons emit light as they transition to low energy.

1, the diffusion plate 140 may be disposed below the glass substrate 110, reflect white light provided by the white LED 120 and emit the light through the glass substrate 110 have.

A part of the white light provided by the white LED 120 is reflected by the diffusion plate 140 and emitted through the glass substrate 110. A part of the white light not reflected is transmitted to the other diffusion plate through the glass substrate 110 And can be reflected.

Also, the diffusion plate 140 may be coated with silicon oxide (SiO ₂ ) or titanium oxide (TiO ₂ ), and the reflection efficiency of the white light provided by the white LED 120 may be increased.

In the hybrid OLED 100 as described above, the RGB OLED 130 and the diffusion plate 140 may constitute one pixel.

Here, the diffusion plate 140 may be arranged to correspond to an area where the RGB OLED 130 is not disposed in the corresponding pixel, as shown in FIG.

Each pixel composed of the RGB OLED 130 and the diffusion plate 140 is a combination of white light emitted from the RGB OLED 130 and white light emitted from the white LED 120 reflected from the diffusion plate 140, It can diverge.

In this case, the RGB OLED 130 and the diffusion plate 140 can emit white light according to the respective divergence ratios. In one embodiment, a white light divergence ratio of 50% can be set.

As described above, the process of depositing the OLED (vacuum thermal deposition in one embodiment) is to heat the crucible (not shown) in which an organic material (not shown) is embedded in a vacuum chamber (not shown) And there is a disadvantage that the process cost is very high, such as evaporation of organic substances (not shown) by heating.

Also, since OLEDs emit light using organic materials, there is a problem that the longer the material life, the larger the applied voltage.

However, in order to emit white light using only the RGB OLED 130, the RGB voltage must be driven to the maximum level, so that the applied voltage must be large. As a result, there is a problem that the lifetime is shortened.

In contrast, the hybrid OLED 100 of the present invention shown in FIG. 1 can set the ratio of the white light emitted through the RGB OLED 130 and the diffusion plate 140 (50: 50 in one embodiment) The OLED 130 does not need to drive RGB to a maximum level to emit white light.

Therefore, since the applied voltage of the RGB OLED 130 does not have to be as large as that of the prior art, the load can be reduced and the material lifetime can be further increased as compared with the prior art, and the problem of the color mixture defect occurring when viewed from the side can also be solved.

2 is a view illustrating an AMOLED cell using a hybrid OLED 100 according to an embodiment of the present invention.

An AMOLED cell (hereinafter referred to as 'AMOLED cell') 200 using a hybrid OLED 100 according to an embodiment of the present invention includes a data driver IC for transmitting a signal to a lateral electrode, a gate driver IC < / RTI >

The data signal by the data driver IC can be sequentially selected from the top to the bottom of the horizontal electrode. The gate signal by the gate driver IC is used to input information (data) Can be selected.

2, the AMOLED cell 200 may further include a thin film transistor (TFT) serving as a switch and a storage capacitor for storing information for one frame, and Data A controller for controlling the driver IC and the gate driver IC to transmit signals to the respective electrodes, and the like, may further include various components constituting the AMOLED cell 200.

2, each pixel of the AMOLED cell 200 includes an RGB OLED 130 and a diffusion plate 140, and a plurality of white LEDs 120 may be disposed on one side of the AMOLED cell 200.

That is, since the data signal by the data driver IC sequentially selects the horizontal electrodes from the top to the bottom, the white LED 120 is present only on one side.

Assuming Full HD (1080 × 1080), 16.7 msec is required per frame. Since the data signal is transferred to the electrode horizontally, it is 16.7 msec / 1080, so that it can be seen that the signal is transmitted at about 10 nsec.

That is, the data signals are sequentially transmitted from the first line to the lower 1080th line, and each pixel is controlled in the gate signal to emit light.

In one embodiment, when about 20 white LEDs 120 are used (1080/20 = 50), one white LED 120 is responsible for 50 pixels.

For reference, the diffusion plate 140 constituting each pixel of each horizontal line reflects a part of the white light emitted from the white LED 120 responsible for the corresponding line, and the remaining white light not reflected reflects a diffusion The white light emitted from the white LED 120 can be uniformly reflected through the diffusion plate 140 of all the pixels. Of course, it should be uniformly reflected according to the white light divergence ratio with the RGB OLED 130.

As described above, the hybrid OLED 100 of the present invention and the AMOLED cell 200 using the OLED 100 can solve the lifetime problem of the OLED that emits white light using only the conventional OLED.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Hybrid OLED
110: glass substrate
120: white LED
130: RGB OLED
140: diffusion plate
200: AMOLED Cell

Claims (8)

In a hybrid type organic light emitting diode (OLED)
A glass substrate;
A light emitting diode (LED) disposed on one side of the glass substrate to provide white light;
An RGB organic light emitting diode (OLED) deposited on the upper surface of the glass substrate and emitting white light in RGB combination; And
A diffusion plate disposed at a lower portion of the glass substrate to reflect a part of white light provided from the light emitting diode and to emit the reflected white light through the glass substrate;
≪ / RTI >
The RGB organic light emitting diode and the diffusion plate constitute one pixel,
Wherein the diffusing plate is arranged to correspond to a free region of the glass substrate on which the RGB organic light emitting diode is not disposed at the corresponding pixel so that the reflected white light is emitted through the empty region of the glass substrate,
The pixel
Wherein the organic light emitting diode emits white light according to predetermined emission ratios of the white light emitted from the RGB organic light emitting diode and the white light reflected from the diffusion plate.

delete The method according to claim 1,
Wherein the emission ratio of the white light emitted from the RGB organic light emitting diode and the white light reflected from the diffusion plate is 50%, respectively.
The method according to claim 1,
The diffuser plate
(SiO ₂ ) or titanium oxide (TiO ₂ ) is coated on the surface of the organic light emitting diode.
In a hybrid type active matrix organic light emitting diode (AMOLED) cell,
A glass substrate;
A plurality of light emitting diodes (LEDs) arranged at predetermined intervals on one side of the glass substrate to provide white light;
A plurality of RGB organic light emitting diodes (OLED) deposited to be arranged in a predetermined form on the upper surface of the glass substrate and emitting white light in RGB combination; And
A plurality of diffusion plates arranged in a predetermined form on the lower surface of the glass substrate so as to reflect a part of white light provided from the light emitting diode and emit the reflected white light through the glass substrate,
≪ / RTI >
The RGB organic light emitting diodes and the diffusion plates arranged in the predetermined form constitute one pixel,
Wherein each of the diffusing plates is disposed in the corresponding pixel so as to correspond to a free region of the glass substrate on which the RGB organic light emitting diodes are not disposed so that the reflected white light is emitted through the free region of the glass substrate,
Each of the light emitting diodes (LEDs) provides the white light to the pixels arranged in a plurality of rows on the glass substrate so that the provided white light is uniformly reflected in the diffusion plate constituting each pixel ,
The pixel
Wherein white light is emitted according to predetermined emission rates for white light emitted from the RGB organic light emitting diode and white light reflected from the diffusion plate.
delete 6. The method of claim 5,
Wherein the emission ratio of the white light emitted from the RGB organic light emitting diode and the white light reflected from the diffusing plate is 50%, respectively. ≪ RTI ID = 0.0 > 31. < / RTI >
6. The method of claim 5,
The diffuser plate
Silicon oxide (SiO ₂₎ or titanium oxide (TiO ₂₎ a hybrid-type active matrix organic light emitting diode cell in which characterized in that the coating.

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