KR101548369B1 - Method for manufacturing phosphor sheet for white oled light sources and white oled light sources manufactured using the same - Google Patents

Abstract

The present invention relates to a method for manufacturing a fluorescent sheet to implement a white light source used in organic light emitting diode (OLED) and the white light source for the OLED implemented by using the same. In order to simplify the method for manufacturing the white OLED light source and reduce the manufacturing costs thereof, the present invention uses a low refractive index silicone resin to manufacture the fluorescent sheet and attaches the manufactured fluorescent sheet to the glass surface of an RGB OLED light source to implement the white OLED light source instead of directly injecting phosphors into an OLED to implement the white OLED light source. The method includes: (a) a process of coating first low refractive index silicon on the fluorescent sheet; (b) a process of dispersing RGB phosphors in the first low refractive index silicon; (c) a process of mixing second low refractive index silicon in the first low refractive index silicon having the RGB phosphors dispersed therein during the process (b); (d) a process of removing air bubbles; (e) a process of coating the fluorescent sheet which has the air bubbles removed in the process (d) onto a silicone release film and drying the coated fluorescent sheet; and (g) a process of laminating a fluorine release film or silicone release film onto the fluorescent sheet dried in the process (e).

Description

Technical Field [0001] The present invention relates to a method of manufacturing a fluorescent sheet for a white OLED light source, and a white OLED light source using the same. BACKGROUND ART [0002]

The present invention relates to a method of fabricating a fluorescent sheet for a white OLED light source and a white OLED light source using the same, and more particularly, to a white OLED light source by injecting a phosphor directly into an OLED, The present invention relates to a technique for manufacturing a fluorescent OLED light source using a resin and adhering or bonding the fluorescent sheet to a glass substrate of an RGB OLED light source.

Regarding the method of manufacturing a white light emitting diode, many are registered and disclosed in addition to Korean Registered Patent No. 10-0666222 (hereinafter referred to as 'precedent document').

The above prior art document discloses a method of manufacturing a white light emitting diode, comprising the steps of: (a) forming a wire bump with a conductive wire on an electrode terminal portion formed in an electrical circuit pattern on a substrate portion; (b) picking up the LED chip and subjecting the electrode terminal portion and the wire bump to ultrasonic thermo-compression at the position of the wire bump; (c) mounting the phosphor mixed epoxy produced by mixing the phosphor and the liquid epoxy into the dispenser; (d) mounting the substrate portion on a mold to which a mold release agent has been applied, mounting the mold on a mold press, and applying pressure under predetermined conditions; (e) injecting the phosphor mixed epoxy into the epoxy injection port of the mold under a constant pressure condition of the dispenser; (f) curing the phosphor mixed epoxy under preset curing conditions; (g) separating the mold from the mold press and dicing the substrate portion molded with the cured phosphor mixed epoxy to a predetermined size, wherein the step (c) includes a step of mixing the base of the liquid epoxy and the curing agent Mixing the phosphor at a predetermined mixing ratio and mixing the phosphor at a ratio of 3 to 70 wt% of the epoxy amount to produce the phosphor mixed epoxy; And stirring the phosphor mixed epoxy, and then performing a defoaming process, placing the phosphor in a syringe for a dispenser, and mounting the dispenser on the syringe.

As is well known, OLEDs are organic light emitting diodes, and operate by the principle of converting electrical energy into light energy by applying a voltage or an electric current to an organic material. Such OLEDs are mainly used as a display light source and a light source for illumination.

As a method of implementing a white light source of an OLED, there are a mixed light emission scheme using mixed RGB and RB light emission materials, a structure using multiple RGB and RB layers, a stacked OLED and a multi-photon emission structure, And a down conversion structure in which phosphor red is emitted.

These structures have disadvantages in that the manufacturing method is complicated, color coordinate variation is severe, and the efficiency is low.

That is, in the prior art including the prior art, in order to implement a white light source, a method of directly injecting a phosphor into an OLED has posed a problem in the lifetime and efficiency of the OLED light source.

Accordingly, efforts are being made to develop various methods for implementing a white OLED.

In the case of a fluorescent sheet, a method of implementing a white light source of an LED and an OLED by using a fluorescent material is widely applied, but a fluorescent sheet using a fluorescent material and a low refractive index silicone resin is currently under development.

Korean Patent No. 10-0666222.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a white OLED light source, in which a phosphor is directly injected into an OLED to simplify a manufacturing cost and a manufacturing method, An object of the present invention is to manufacture a fluorescent sheet using a low refractive index silicone resin and to adhere or adhere the fluorescent sheet to a glass substrate of an RGB OLED light source to realize a white OLED light source.

According to an aspect of the present invention, there is provided a method of fabricating a fluorescent sheet for a white OLED light source, the method comprising: (a) applying a first low refractive index silicon to a fluorescent sheet; (b) dispersing RGB phosphors in the first low refractive index silicon; (c) mixing the second low refractive index silicon with the first low refractive index silicon dispersed through the step (b); (d) removing bubbles; (e) coating the silicone release film with the bubble-removed fluorescent sheet through the step (d) and drying; And (g) laminating a fluorine-containing film or a silicone release film to the fluorescent sheet dried through the step (e); .

The first low refractive index silicon may be a combination of a vinyl siloxane based on Vilnyl phenyl polysiloxane resin and a platinum catalyst in an amount of 0.1 to 0.5% .

Also, the second low refractive index silicon may be a combination of a vinyl siloxane based on a vinyl phenyl polysiloxane resin and a platinum catalyst in a content of 0.1 to 0.5% (pt contents) as transparent low refractive index silicon .

In the step (d), a vacuum defoaming process is used.

The present invention relates to a white OLED light source, and is characterized in that a fluorescent sheet manufactured by a method for manufacturing a fluorescent sheet for a white OLED light source is formed by sticking or adhering to a light source glass substrate of RGB OLED.

According to the present invention, since a phosphor sheet is manufactured and applied instead of directly injecting a phosphor into an OLED, lifetime and efficiency of the OLED light source caused by the injected phosphor do not occur, thereby realizing an efficient white OLED light source There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an overall flow diagram of a method for fabricating a fluorescent sheet for a white OLED light source implementation in accordance with the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a white OLED light source, and more particularly, to a fluorescent OLED light source.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

A method of manufacturing a fluorescent sheet for a white OLED light source according to the present invention and a white OLED manufactured using the same will be described with reference to FIGS. 1 to 2. FIG.

FIG. 1 is a general flowchart of a method of manufacturing a fluorescent sheet for a white OLED light source according to the present invention. FIG. 2 is a schematic view illustrating a method of fabricating a fluorescent OLED light source according to the present invention. FIG. 2 is a view showing an example in which the light source is attached to a light source glass substrate. FIG.

1, a method of fabricating a fluorescent sheet for a white OLED light source according to the present invention includes the steps of applying a first low refractive index silicone (S10) to a fluorescent sheet, a step of dispersing a fluorescent material in a first low refractive index silicon (S20), a step (S30) of mixing the second low refractive index silicon with the dispersed first low refractive index silicon, a bubble removing step (S40), a step (S50) of coating and drying the silicone release film, a fluorine release film And a film laminating process (S60). In order to realize a white OLED light source, a process of adhering or adhering the fluorescent sheet manufactured through steps S10 through S60 onto the glass substrate of the RGB OLED light source 20 is performed If you look at it in detail, it is as follows.

[S10] Applying the first low refractive index silicone.

The first low refractive index silicon is applied to the fluorescent sheet.

[S20] The phosphor is dispersed in the first low refractive index silicon.

The RGB phosphors are dispersed in the first low refractive index silicon.

The first low refractive index silicon is a transparent low refractive index silicon having a refractive index of 1.4 to 1.45. The first low refractive index silicone is a vinyl siloxane based on a vinylphenyl polysiloxane resin and 0.1 to 0.5% (pt contents ) ≪ / RTI > content of platinum catalyst.

[S30] The second low refractive index silicon is mixed with the first low refractive index silicon in which RGB phosphors are dispersed.

The second low refractive index silicon is mixed with the first low refractive index silicon in which the RGB phosphors are dispersed through step S20.

The second low refractive index silicon is a transparent low refractive index silicon having a refractive index of 1.4 to 1.45. The second low refractive index silicon is a vinyl siloxane based on a vinyl phenyl polysiloxane resin and 0.1 to 0.5% (pt contents ) ≪ / RTI > content of platinum catalyst.

[S40] Remove air bubbles.

Vacuum defoaming process is used to remove bubbles.

[S50] Coating and drying on silicone release film.

A fluorescent sheet is coated on a silicone release film using a coating method such as a comma or a screen and dried at 130 ° C to 170 ° C for 2 to 10 minutes.

[S60] Fluoride release film or silicone release film laminate.

A fluorine releasing film or a silicone releasing film is laminated on the dried fluorescent sheet.

Thereafter, the fluorescent sheet 10 manufactured through steps S10 to S60 is applied to a glass substrate, an anode, a hole transport layer, an organic emission layer, and an electron transport layer an electron transport layer and a cathode are laminated on the glass substrate of the RGB OLED to form a white OLED light source.

As described above, by attaching or adhering the fluorescent sheet 10 manufactured by the method for manufacturing a fluorescent sheet for a white OLED light source to the light source glass of the RGB OLED 20, The white OLED light source 20 has advantages in that it can simplify the manufacturing cost and the manufacturing method and realize the white OLED light source 20 in the method of manufacturing the white OLED light source unlike the conventional method of implementing the white OLED light source.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It will be appreciated by those skilled in the art that numerous changes and modifications may be made without departing from the invention. Accordingly, all such appropriate modifications and changes, and equivalents thereof, should be regarded as within the scope of the present invention.

10: Fluorescent sheet
20: RGB OLED light source

Claims (5)

(a) applying a first low refractive index silicon to a fluorescent sheet;
(b) dispersing RGB phosphors in the first low refractive index silicon;
(c) mixing the second low refractive index silicon with the first low refractive index silicon in which the RGB phosphors are dispersed through the step (b);
(d) removing bubbles;
(e) coating the silicone release film with the bubble-removed fluorescent sheet through the step (d) and drying; And
(g) laminating a fluorine releasing film or a silicon releasing film to the fluorescent sheet dried through the step (e); ≪ / RTI >
In the step (e)
Characterized in that the fluorescent sheet is coated on the silicone release film using a comma or screen coating method.
The method according to claim 1,
The first low refractive index silicon may be, for example,
Characterized in that it is composed of a combination of a vinyl siloxane based on a vinyl phenyl polysiloxane resin and a platinum catalyst in a content of 0.1 to 0.5% (pt contents) as a transparent low refractive index silicon. A method of fabricating a fluorescent sheet for light source implementation.
The method according to claim 1,
The second low refractive index silicon has a refractive index
Characterized in that it is composed of a combination of a vinyl siloxane based on a vinyl phenyl polysiloxane resin and a platinum catalyst in a content of 0.1 to 0.5% (pt contents) as a transparent low refractive index silicon. A method of fabricating a fluorescent sheet for light source implementation.
The method according to claim 1,
In the step (d)
Wherein the vacuum degassing process is used to produce a fluorescent OLED light source.
A white OLED light source characterized in that a fluorescent sheet manufactured by any one of claims 1 to 4 is adhered or adhered onto a light source glass of RGB OLED.

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