TWI468793B - Organic light emitting display device - Google Patents

Description

Organic light emitting display device

The present invention relates to an organic light emitting display device. More particularly, the present invention relates to an organic light emitting display device for preventing visibility reduction and high viewing angle color transition caused by reflection of incident light.

The image display device that realizes various kinds of information on the screen is trending toward thin, light weight, light weight, and high performance as the core technology of the information communication era. According to space efficiency and convenience requirements, a flexible display is required, and an organic light-emitting display device that controls the amount of emitted light has recently attracted attention as a flat panel display.

The organic light emitting display device includes an organic light emitting display panel in which a first electrode, an organic light emitting layer, and a second electrode are laminated in this order between an upper substrate and a lower substrate. An electric field is formed between the first electrode and the second electrode at both ends of the organic light-emitting layer, and electrons and holes are injected and transported in the organic light-emitting layer, and then the electrons and holes are combined. At this time, the combination of electrons and holes can cause luminescence, which is called "electroluminescence phenomenon". The organic light emitting display device utilizes the electroluminescence phenomenon.

Unlike the liquid crystal display device, the organic light emitting display device does not require an additional light source, and the organic light emitting display device is light and thin compared to the liquid crystal display device. In addition, the organic light-emitting display device has attracted attention as a next-generation display device due to high quality such as low power consumption, high brightness, and high response speed.

Meanwhile, the organic light-emitting display device is classified into a top emission type and a bottom emission type depending on the light emission direction. The bottom emission type has superior safety and process variability, but is not suitable for high resolution products due to the limited aperture ratio. Therefore, in recent years, a large number of studies have been conducted on a top emission type organic light-emitting display device having a high aperture ratio and a high resolution.

However, according to the intensity of external light, the display ratio of the organic light-emitting display device is greatly lowered. Therefore, by providing the organic light-emitting display panel with the anti-reflection layer, the organic light-emitting display device prevents contrast deterioration caused by external light, thereby improving visibility.

1 is a cross-sectional view illustrating a prior art organic light-emitting display device, and FIG. 2 is a cross-sectional view illustrating a channel of external light incident on the organic light-emitting display device. Fig. 3 is an image showing a screen defect of the organic light-emitting display device.

As shown in FIG. 1, the related art organic light-emitting display device includes an upper substrate 100a and a lower substrate 100b, an organic light-emitting display panel 100, and an anti-reflection member 200 including the upper substrate 100a and the lower substrate. The organic light emitting layer 100c between 100b is formed on the organic light emitting display panel 100.

The anti-reflection member 200 includes a retardation film (hereinafter also referred to as "quarter wave plate", QWP, 220) and a polarization film 240 formed on the quarter wave plate 220 to prevent incidence to the organic light The reflection and emission of external light from the display device. The polarization film 240 has a transmission axis, and among the external light incident on the polarization film 240, the polarization film 240 transmits linearly polarized light parallel to the transmission axis, but absorbs light not parallel to the transmission axis. .

Further, the quarter wave plate (λ/4 wave plate) 220 changes the polarization state of light, and has an optical axis which is inclined by about 45° with respect to the transmission axis of the polarization film 240. The quarter-wave plate 220 changes linearly polarized light when passing through the polarizing film 240 into circularly polarized light, or converts circularly polarized light into linearly polarized light.

The upper protective layer 230a and the lower protective layer and 230b are bonded to the upper and lower surfaces of the polarizing film 240, respectively, for supporting and protecting the polarizing film 240. In addition, the quarter wave plate 220 is bonded to the organic light emitting display panel 100 through the lower adhesive layer 210b, and the lower protective layer 230b is bonded to the quarter wave plate 220 through the upper adhesive layer 210a.

Specifically, as shown in FIG. 2, external light is incident through the polarizing film 240. At this time, the polarizing film 240 transmits external light parallel to the transmission axis and absorbs external light that is not parallel to the transmission axis. Therefore, the external light is linearly polarized in the direction of the transmission axis. Then, the linearly polarized external light passes through the quarter-wave plate 220 and is circularly polarized, causing its vibration direction to move circularly.

Further, the circularly polarized external light is reflected through the surface of the organic light-emitting display panel 100, and then the direction of rotation of the external light is reversed. The light then passes through the quarter wave plate 220 and is then linearly polarized. At this time, since the polarization surface of the light passing through the quarter-wave plate 220 and then linearly polarized is perpendicular to the polarization surface of the linearly polarized light that does not pass through the quarter-wave plate 220, it is again The linearly polarized external light forms an angle of 90 with the transmission axis of the polarizing film 240. Therefore, external light does not pass through the polarizing film 240 and is absorbed and blocked by the polarizing film 240. That is, the light incident to the organic light-emitting display device is not released to the outside.

However, in the related art organic light-emitting display device, the anti-reflection member 200 adhered to the organic light-emitting display panel 100 has a large thickness of more than 200 μm because the adhesive layer on both surfaces of the quarter-wave plate 220 is utilized. The quarter wave plate 220 is bonded to the organic light emitting display panel and the lower protective layer 230b. Therefore, it is difficult to achieve slimming of the organic light-emitting device.

Further, when external light having a wavelength of the entire visible light range instead of a single wavelength is incident on the organic light-emitting display device, the light transmittance of the quarter-wave plate 220 varies depending on the wavelength range. For this reason, the conversion of linearly polarized light to circularly polarized light or circularly polarized light to linearly polarized light is incomplete. Further, the lower protective layer 230b between the polarizing film 240 and the quarter-wave plate 220 also exhibits retardation and the transmittance of externally emitted external light varies depending on the wavelength range. As shown in Fig. 3, there is a screen defect of the organic light-emitting display device.

That is, in the related art organic light-emitting display device, the lower protective layer 240b has a retardation and the transmittance varies in the respective wavelength ranges due to the wavelength dispersion of the quarter-wave plate 220. In particular, the transmittance is high in the red and blue wavelength ranges, and when red and blue light are transmitted to the black mode organic light-emitting display device, purple is displayed instead of black.

Accordingly, the present invention is directed to an organic light emitting display device that can substantially obviate one or more problems due to the limitations and disadvantages of the related art.

An object of the present invention is to provide an organic light emitting display device including an anti-reflection member formed on an organic light-emitting display panel for improving visibility of an organic light-emitting display device, wherein the anti-reflection member includes wavelength-free dispersion A reactive liquid crystal layer and a non-retardation triacetyl cellulose (TAC), NRT film, and thereby preventing color transition.

In order to achieve the above objects and other advantages and in accordance with the purpose of the present invention, and specifically and generally described herein, an organic light emitting display device includes: an organic light emitting display panel; and an anti-reflection member bonded to the organic light emitting device An outer surface of the display panel, the anti-reflection member comprising a reactive liquid crystal layer and a polarizing film, the reactive liquid crystal layer and the polarizing film being laminated in this order, wherein the reactive liquid crystal layer is related to the polarizing film The transmitted light has a λ/4 delay.

The reactive liquid crystal layer includes: an alignment layer; and a reactive liquid crystal coated on the alignment layer.

The reactive liquid crystal layer is circularly polarized from the polarized film linearly polarized light, or linearly polarized from the organic light emitting display panel circularly polarized light.

The reactive liquid crystal layer comprises a polyimine and a reactive liquid crystal.

The reactive liquid crystal layer can be directly coated on an organic display panel or directly coated on the lower surface of the polarizing film.

Further, the polarizing film is composed of a polarizing layer having a transmission axis, and an upper protective layer and a lower protective layer bonded to the upper and lower sides of the polarizing film. In this case, the reactive liquid crystal layer can be directly coated on the outer surface of the lower protective layer. Also, preferably, the lower protective layer is a non-delayed triethylcellulose.

Further, the reactive liquid crystal layer has a negative dispersion with respect to the wavelength. In this case, the reactive liquid crystal layer has a refractive index of a red wavelength and a blue wavelength smaller than a refractive index of a green wavelength.

On the contrary, the reactive liquid crystal layer has a positive dispersion with respect to the wavelength.

Further, the optical axis of the reactive liquid crystal layer has an angle of about +45 or -45 with respect to the transmission axis of the polarizing film.

Furthermore, the organic light emitting display device may further include an adhesive layer between the polarizing film and the organic light emitting display panel.

Here, the organic light emitting display panel comprises: a substrate; a thin film transistor array; an organic light emitting element array connected to the thin film transistor array; and a package substrate for covering the thin film transistor array and the organic light emitting element Array.

The above general description and the following detailed description are intended to be illustrative and illustrative of the invention

The organic light-emitting display device of the present invention will be more readily understood from the following detailed description in conjunction with the accompanying drawings.

Fig. 4 is a cross-sectional view showing the organic light-emitting display device of the present invention according to the first embodiment. Fig. 5 is a cross-sectional view showing the organic light-emitting display device of the invention according to the second embodiment. 6A and 6B are diagrams respectively illustrating a prior art organic light emitting display device and a Poincaré ball in the organic light emitting display device of the present invention (Poincar) A cross-sectional view of the channel of external light on Sphere). Further, FIGS. 7A and 7B respectively show color transitions of the related art organic light-emitting display device and the organic light-emitting display device of the present invention. 8A and 8B show the transmittances of the related art organic light-emitting display device and the organic light-emitting display device of the present invention.

Referring to FIG. 4, according to the first embodiment, the organic light-emitting display device of the present invention includes an organic light-emitting display panel 300 and an anti-reflection member 400, and the anti-reflection member 400 is adhered to the organic light-emitting display panel 300 to prevent incidence to the organic light-emitting display device. Reflection and emission of external light.

The organic light-emitting display panel 300 includes a plurality of sub-pixels arranged in a matrix between the upper substrate 300a and the lower substrate 300b. At this time, the bank 300c is formed between the sub-pixels, and each sub-pixel is separated based on the bank 300c. In addition, each sub-pixel emits red (R) light, green (G) light, and blue (B) light using an additional organic material.

The upper substrate 300a and the lower substrate 300b of the organic light-emitting display panel 300 are transparent substrates. Although not illustrated, the lower substrate 300b includes a unit operating member and a protective layer, wherein the unit operating member includes a plurality of signal lines and a plurality of thin film transistors. And the upper substrate 300a is a substrate for packaging.

The unit operating member includes a transistor for switching, a transistor for operation, and a storage capacitor. The transistor for the switch provides a data signal from the data line in response to the scan signal of the gate line; the transistor for operation controls the amount of current through the organic light emitting display device through the connection electrode in response to the current from the switch The data signal of the transistor.

Further, even when the transistor for the switch is turned off, the storage capacitor allows a predetermined current to flow through the transistor for operation. The transistor for operation is electrically connected to the organic light-emitting display panel 300 through a connection electrode.

When the holes and electrons respectively injected from the first electrode and the second electrode are combined to form excitons and the excitons are then lowered to the ground state, the organic light-emitting layer is a light-emitting layer. A hole transport layer is formed between the first electrode and the organic light emitting layer. A hole injection layer for promoting hole injection into the organic light-emitting layer may be further formed between the first electrode and the hole transport layer. Further, an electron transport layer is formed between the organic light emitting layer and the second electrode. An electron injecting layer may be further formed to promote electron injection into the organic light emitting layer.

Here, the unit from the first electrode to the second electrode may be referred to as an "organic light-emitting diode" (OLED), and the unit operating member and the OLED are formed in a matrix form on the lower substrate 300b.

Further, according to the intensity of the external light, the display ratio of the organic light-emitting display device is largely lowered. Therefore, the organic light-emitting display device includes the anti-reflection member 400 on the organic light-emitting display panel 300 to prevent a decrease in contrast caused by external light, thereby improving visibility.

The antireflection member of the prior art organic light emitting display device includes a polarizing film and a retardation film. The polarized film transmits external light parallel to the transmission axis of the polarizing film and absorbs external light that is not parallel to the transmission axis of the polarizing film. Further, the retardation film converts linearly polarized light into circularly polarized light or converts circularly polarized light into linearly polarized light.

In this regard, as described above, in the related art organic light-emitting display device, the lower protective layer of the polarizing film has a retardation value, and depending on the wavelength, the transmittance of the emitted light from the organic light-emitting display device is different. In this case, in the external light passing through the quarter-wave plate, the light that does not satisfy the optimum requirement of the quarter-wave plate (retardation film) and the light emitted from the organic light-emitting layer to the outside can be at a high viewing angle. The area experiences a color shift.

In the related art organic light-emitting display device, the anti-reflection member bonded to the organic light-emitting display panel has a large thickness of more than 200 μm because the adhesive layer on the two surfaces of the quarter-wave plate is utilized, one quarter The wave plate is disposed between the organic light emitting display panel and the lower protective layer. Therefore, it is difficult to achieve slimming of the organic light-emitting device. Further, when the organic light-emitting display device is applied as a 3D display by the thin film type polarization 3D technology, as the anti-reflection member becomes thick, the visible viewing angle region is narrowed.

Therefore, the organic light-emitting display device of the present invention includes a reactive liquid crystal layer 420 instead of the quarter-wave plate on the organic light-emitting display panel 300, and the organic light-emitting display device uses a non-delay value under the polarization layer 440. The triacetyl cellulose layer 430b is delayed.

Here, the anti-reflection member will be specifically described.

The anti-reflective member 400 includes a polarizing layer 440, a protective layer 430a adhered to the polarizing layer 440, and non-retardation triacetyl cellulose (TAC) adhered to the underside of the polarizing layer 440. a NRT) layer 430b and an organic light emitting display panel 300, and a reactive mesogen (RM) layer 420 provided under the non-delayed triacetyl cellulose layer 430b, the reactive liquid crystal layer being transported with respect to the polarizing layer 440 Light has a delay of λ/4.

The optical axis of the reactive liquid crystal layer has an angle of about +45 or -45 with respect to the transmission axis of the polarizing layer 440. Further, although not illustrated, the reactive liquid crystal layer 420 includes an alignment layer 420a and a reactive liquid crystal 420b coated on the alignment layer 420a. For example, the alignment layer 420a is made of polyimide and the reactive liquid crystal 420b is a reactive liquid crystal.

Here, the polarization layer 440, the protective layer 430a, and the non-delayed triacetyl cellulose layer 430b are referred to as a polarizing film as a unit.

The polarization layer 440 is bonded to the upper surface of the reactive liquid crystal layer 420 for converting external light incident to the organic light-emitting display device into linearly polarized light. The polarizing layer 440 is preferably made of polyvinyl alcohol (PVA), and the polarizing film 400 transmits external light parallel to the transmission axis and absorbs external light that is not parallel to the transmission axis.

A protective layer 430a and a non-delayed triethylene cellulose layer 430b are bonded to the top and bottom of the polarizing layer 440 for physically supporting and protecting the polarizing layer 440. The protective layer 430a adhered to the polarizing layer 440 is composed of an acetic acid resin such as triacetyl cellulose (TAC), a polyester resin, a polycarbonate resin, a polyamide resin, a polyimide resin, a polyolefin resin. Made of acrylic resin or the like.

In particular, since the polarizing layer 440 has a thin thickness and low strength, the protective layer 430a is preferably made of a transparent and strong material. The protective layer 430a is preferably a film of a triacetyl cellulose (TAC) saponified with an alkali in view of improving polarization characteristics or stability.

In the case where the protective layer 430a is a triacetyl cellulose film, an additional adhesive layer is not required to bond the protective layer 430a to the polarizing layer 440. Thus, the non-delayed triethylene cellulose layer 430b is bonded to the underside of the polarizing layer 440. The reactive liquid crystal layer 420 is on the outer surface of the non-delayed triethylene cellulose layer 430b. The non-delayed triacetyl cellulose layer 430b is a triacetyl cellulose film which does not exhibit retardation characteristics.

In the prior art organic light-emitting display device, external light passes through a polarizing film and is converted into linearly polarized light, and external light exhibits transmittance change at different wavelengths due to delay of the lower protective layer, while passing through Protect the layer and thereby cause a color shift.

However, in the organic light-emitting display device of the present invention, the non-delayed triacetyl cellulose layer 430b arranged under the polarizing layer 440 serves as a protective layer and prevents color transition. In this case, the reactive liquid crystal layer 420 can be directly coated on the non-delayed triacetyl cellulose layer 430b without Any adhesive is required. In this case, since the optical axis of the reactive liquid crystal layer is defined after being coated on the non-delayed triacetyl cellulose layer 430b, the roll-to-roll process is feasible.

In particular, an organic light-emitting display device using the non-delayed triacetyl cellulose layer 430b exhibits edge visibility and permeability as well as improved optical properties. Further, in some cases, the non-delayed triethylene cellulose layer 430b can be bonded to the top and bottom of the polarizing layer 440.

The reactive liquid crystal layer 420 is bonded to the upper substrate 300a of the organic light-emitting display panel 300 through an adhesive layer 410.

At this time, the adhesive layer 410 is made of a commonly used adhesive resin which does not restrict light transmission. Examples of the binder resin include acrylic acid, urethane, polyisobutylene, styrene butadiene rubber (SBR), rubber, polyvinyl ether, epoxy resin, melamine, polyester, phenol, and anthraquinone resins and copolymers thereof.

In particular, the adhesive layer 410 is preferably made of a material that prevents moisture from penetrating into the organic light-emitting display device 200, and the material is preferably an acrylic or enamel resin having excellent heat resistance.

In other cases, the reactive liquid crystal layer 420 may be directly coated on one surface of the organic light-emitting display panel 300 as shown in FIG. In this case, an adhesive layer may be further disposed between the reactive liquid crystal layer and the non-delayed triacetyl cellulose layer 430b.

Specifically, the reactive liquid crystal layer 420 includes an alignment layer 420a and a reactive liquid crystal 420b. For example, the alignment layer 420a is made of polyimide and the reactive liquid crystal 420b is a reactive liquid crystal. The reactive liquid crystal 420b is an organic substance containing photopolymerization groups at both ends of the liquid crystal molecules and the photopolymerization groups are connected to each other when irradiated with ultraviolet light. Otherwise, the reactive liquid crystal layer 420 is formed by directly coating a liquid material containing the polyimide and the reactive liquid crystal 420b on the organic light-emitting display panel 300 or the non-delayed triacetyl cellulose layer 430b.

Here, the reactive type liquid crystal 420b is self-aligned and aligned in the same direction as the orientation direction of the alignment layer 420a, and its optical axis is formed according to the orientation direction of the alignment layer 420a.

The reactive liquid crystal layer 420 performs the same function as the circularly polarized plate, and converts light linearly polarized by the polarizing layer 440 into circularly polarized light, or converts circularly polarized light. It is linearly polarized light.

A method for forming the reactive liquid crystal layer 420 according to an embodiment will be described below.

First, the reactive liquid crystal layer is arranged on the surface of the adhesive layer 410 in a predetermined direction, and the reactive liquid crystal 420b is coated on the alignment layer 420a. Because the optical axis of the reactive liquid crystal 420b is based on the opposite The alignment direction of the liquid crystal layer is formed such that the orientation direction of the reactive liquid crystal layer 420b preferably forms an angle of about +45° or -45° with respect to the transmission axis of the polarization layer 440. UV light is then irradiated to cure the coated reactive liquid crystal 420b, thereby forming a reactive liquid crystal layer 420.

The polarizing layer 440 is preferably made of polyvinyl alcohol (PVA), and the polarizing film 400 transmits external light parallel to the transmission axis and absorbs external light that is not parallel to the transmission axis.

Therefore, external light incident to the organic light-emitting display device is linearly polarized on the transmission axis of the polarization layer 440. Further, the linearly polarized external light passes through the reactive liquid crystal layer 420 under the polarizing layer 440. The reactive liquid crystal layer 420 has an optical axis which forms an angle of about +45° or -45° with respect to the transmission axis of the polarization layer 440, and the external light is circularly polarized to cause the vibration direction to move circularly. .

Further, external light rays that are circularly polarized are reflected on the surface of the organic light-emitting display panel 300, and their rotation directions are reversed. The light then passes through the reflective liquid crystal layer 420 and is then linearly polarized. At this time, the external light passing through the reflective liquid crystal layer 420 and then linearly polarized is perpendicular to the polarization plane of the linearly polarized light that does not pass through the reactive liquid crystal layer 420, thereby linearly polarizing the external light and the polarization. The transmission axis of layer 440 forms an angle of 90°. Therefore, the external light incident to the organic light-emitting display device is absorbed and blocked by the polarization layer 440 because the light does not pass through the polarization layer 440 and is not emitted to the outside.

That is, the external light incident to the organic light-emitting display device is not emitted to the outside, and the reflection of the external light can be prevented by the anti-reflection member 400, and the visibility of the organic light-emitting display device is further improved. Further, the organic light-emitting display device of the present invention uses a reactive liquid crystal layer 420 having a negative dispersion with respect to wavelength. In this case, the refractive index of the red wavelength and the blue wavelength of the reactive liquid crystal layer has a refractive index smaller than the green wavelength. Therefore, the color angle can be prevented from being high in viewing angle. In particular, the reactive liquid crystal layer 420 is cheaper and thinner than the quarter wave plate, so that the production cost of the organic light emitting display device can be reduced.

Conversely, the reactive liquid crystal layer may have a positive dispersion with respect to wavelength. In this case, the layer thickness of the anti-reflection member 400 can be distinguished from the case where the negative dispersion is used as the reactive liquid crystal layer.

Referring to Figures 6A and 6B, the position of the external light is most preferably changed in the order of S ₀ , S ₁ , S ₂ and S ₃ to minimize color transition and effectively prevent reflection of external light on the organic light-emitting display device.

In this regard, as shown in FIG. 6A, in the prior art organic light-emitting display device, the polarizing film is positioned and positioned at the position External light moves to the position after passing through the lower protective layer with a delay value . Then, after passing the quarter wave plate, the light is from position Move to location . Then, the external light is reflected through the surface of the organic light-emitting display device, passes through the quarter-wave plate and then moves to the position. And pass the lower protective layer and then move to the position .

That is, the prior art organic light-emitting display device exhibits color transition and screen defects due to the lower protective layer having a retardation value as shown in Fig. 7A.

On the other hand, as shown in FIG. 6B, in the organic light-emitting display device of the present invention, when external light passes through the non-delayed triacetyl cellulose layer 430b, the external light is in position. S1, and after passing through the reflective liquid crystal layer 420, external light from the position S1 moved to position S2. Further, external light is reflected by the surface of the organic light-emitting display panel 300, and is moved to the position after passing through the reflective liquid crystal layer 420. And remain in position when passing through the non-delayed triethylene cellulose layer 430b .

That is, when the light passes through the non-delayed triacetyl cellulose layer 430b having no retardation value, the organic light-emitting display device of the present invention has no color transition of external light, as shown in Fig. 7B.

Further, the reactive liquid crystal layer 420 is thinner than the quarter-wave plate and can be directly coated on the organic light-emitting display panel 300 or the non-delayed triacetyl cellulose layer 430b. Further, as the reactive liquid crystal material, a positive dispersion characteristic or a negative dispersion characteristic can be selected as the wavelength. Color shifting can be prevented by selecting dispersion characteristics with respect to wavelengths to compensate for color transitions.

Further, the anti-reflection member 400 is thin and thus can realize the elongate of the organic light-emitting display device.

For example, the anti-reflection member of the prior art organic light-emitting display device includes a quarter-wave plate bonded to the upper and lower adhesive layers above and below the quarter-wave plate, a polarizing film, and bonded thereto. The upper and lower protective layers are polarized on the upper and lower sides of the film, and have a thickness of about 200 μm. However, the anti-reflection member 400 of the organic light-emitting display device of the present invention includes a reactive liquid crystal layer 420, an adhesive layer 410 under the reactive liquid crystal layer 420, a polarizing layer 440, and bonded to the polarizing layer 440 and The lower protective layer 430a and the non-delayed triacetyl cellulose layer 430b have a thickness of about 115 μm which is about half the thickness of the antireflection member of the prior art organic light emitting display device.

Further, the anti-reflection member of the related art organic light-emitting display device is thick and exhibits a color transition, thereby causing a decrease in anti-reflection of external light and allowing about 8.5% of external light transmitted to the organic light-emitting display device, as shown in FIG. 8A. Shown. On the other hand, the anti-reflection member 400 of the organic light-emitting display device of the present invention is thin and exhibits improved anti-reflection of external light, and allows about 5.3% of external light incident to the organic light-emitting display device to be transmitted, thereby improving Visibility, as shown in Figure 8B. In addition, by the non-delayed triacetyl cellulose layer between the polarizing film and the reflective liquid crystal layer, edge visibility and permeability are improved, and thus the optical performance of the organic light emitting display device is improved.

As apparent from the above, the organic light-emitting display device of the present invention has the following effects.

First, the anti-reflection member bonded to the organic light-emitting display panel is thin, so that the elongation of the organic light-emitting display device can be achieved.

Secondly, by reducing the total thickness of the anti-reflection member, the anti-reflection ability can be enhanced and the visibility can be improved.

Third, the use of a reflective liquid crystal layer thinner than a quarter wave plate and a non-delayed triethylene cellulose layer as a protective layer can reduce the production cost of the organic light emitting display device.

Fourth, the organic light-emitting display device provides a non-delayed triacetyl cellulose layer between the polarized film and the reflective liquid crystal layer, thereby improving edge visibility and thereby enhancing optical performance.

Fifth, when the organic light-emitting display device is applied to a 3D display by using the polarized light-emitting technology on the organic light-emitting display, the visible viewing angle can be improved by shortening the focal length, because the thinner anti-reflection member is bonded to the organic light-emitting display panel instead of using Quarter wave plate.

Various modifications and variations of the present invention are apparent to those skilled in the art without departing from the scope of the invention. Accordingly, the present invention is intended to cover the modifications and modifications of the invention

The present application claims the benefit of the Korean Patent Application No. 10-2011-0060760, filed on Jun. 22, 2011, and the Korean Patent Application No. 10-2011-0117351, filed on Nov. 11, 2011. All references are hereby incorporated by reference.

100. . . Organic light emitting display panel

100a. . . Upper substrate

100b. . . Lower substrate

100c. . . Organic light emitting layer

200. . . Anti-reflection member

210a. . . Upper adhesive layer

210b. . . Lower adhesive layer

220. . . Quarter wave plate

230a. . . Upper protective layer

230b. . . Lower protective layer

240. . . Polarized film

300. . . Organic light panel

300a. . . Upper substrate

300b. . . Lower substrate

300c. . . Embankment

400. . . Anti-reflection member

410. . . Adhesive layer

420. . . Reactive liquid crystal layer

420a‧‧‧ Alignment layer

420b‧‧‧Reactive LCD

430a‧‧‧Protective layer

430b‧‧‧Non-delayed triethylene cellulose layer

440‧‧‧Polarized layer

S1, S2, S3‧‧‧ position

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the claims In the schema:

1 is a cross-sectional view illustrating a prior art organic light emitting display device;

2 is a cross-sectional view illustrating a passage of external light incident on an organic light emitting display device;

Figure 3 is an image showing a screen defect of the organic light emitting display device;

Figure 4 is a cross-sectional view showing the organic light-emitting display device of the present invention according to the first embodiment;

Figure 5 is a cross-sectional view showing an organic light-emitting display device of the present invention according to a second embodiment;

6A and 6B are diagrams respectively illustrating a prior art organic light emitting display device and an organic light emitting display device of the present invention in Poincar a cross-sectional view of the passage of external light on the ball;

7A and 7B respectively show color transitions of the related art organic light emitting display device and the organic light emitting display device of the present invention;

8A and 8B show the transmittances of the related art organic light-emitting display device and the organic light-emitting display device of the present invention.

300‧‧‧Organic luminescent panels

300a‧‧‧Upper substrate

300b‧‧‧lower substrate

300c‧‧‧

400‧‧‧Anti-reflection members

410‧‧‧Adhesive layer

420‧‧‧Reactive liquid crystal layer

420a‧‧‧ Alignment layer

420b‧‧‧Reactive LCD

430a‧‧‧Protective layer

430b‧‧‧Non-delayed triethylene cellulose layer

440‧‧‧Polarized layer

Claims (9)

An organic light emitting display device comprising: an organic light emitting display panel; and an anti-reflection member bonded to an outer surface of the organic light emitting display panel, the anti-reflection member comprising a reactive liquid crystal layer and a polarization a reactive film, the reactive liquid crystal layer being formed between the organic light emitting display panel and the polarizing film, wherein the polarizing film is respectively separated by a polarization layer having a transmission axis, and bonded to the polarization An upper protective layer and a lower protective layer on the upper and lower sides of the film, wherein the lower protective layer is a non-delayed triacetyl cellulose, wherein the reactive liquid crystal layer comprises an alignment layer and is coated on the alignment layer a reactive liquid crystal, and wherein the reactive liquid crystal layer has a λ/4 retardation with respect to the transmitted light of the polarizing film, and the reactive liquid crystal layer is directly coated on the non-delayed triacetyl cellulose and is non-delayed Contact with triacetyl cellulose. The organic light-emitting display device of claim 1, wherein the reactive liquid crystal layer is circularly polarized by linearly polarized light of the polarizing film, or linearly polarized by the organic light emitting display. The circularly polarized light of the panel. The organic light-emitting display device of claim 1, wherein the reactive liquid crystal layer comprises a polyimine and a reactive liquid crystal. The organic light-emitting display device according to claim 1, wherein the reactive liquid crystal layer has a negative dispersion with respect to a wavelength. The organic light-emitting display device according to claim 4, wherein the reactive liquid crystal layer has a refractive index of a red wavelength and a refractive index of a blue wavelength smaller than a refractive index of a green wavelength. The organic light-emitting display device of claim 1, wherein the reactive liquid crystal layer has a positive dispersion with respect to a wavelength. The organic light-emitting display device of claim 1, wherein an optical axis of the reactive liquid crystal layer has an angle of about +45° or -45° with respect to a transmission axis of the polarizing film. The organic light-emitting display device of claim 1, further comprising an adhesive layer between the polarizing film and the organic light-emitting display panel. The organic light-emitting display device of claim 1, wherein the organic light-emitting display panel comprises: a substrate; a thin film transistor array formed on the substrate; and an organic light-emitting element array connected to the thin film transistor array And a package substrate for covering the thin film transistor array and the organic light emitting element array.