KR100889542B1 - Flat Lighting Apparatus Using Organic EL Display - Google Patents

Abstract

The present invention is to provide a planar lighting device using an organic EL element, comprising: a lighting device having a light source device for emitting light and emitting light from the light source device to illuminate the object to be illuminated; It is characterized by consisting of an organic EL element, by realizing a perfect planar light source using the organic EL element as a light source of the illumination device can greatly increase the area of light emitted from the planar light source and maintain a uniform illuminance of the entire illumination.

Illuminator / Organic EL

Description

Flat lighting device using organic EL element {Flat Lighting Apparatus Using Organic EL Display}

1 is a view showing an indoor lighting apparatus according to the prior art

2 is a view showing a planar lighting device using an organic EL device according to the present invention;

3 and 4 show an embodiment of a planar lighting apparatus using an organic EL element according to the present invention.

* Explanation of symbols for main parts of the drawings

10, 10 ', 20: organic EL

30: color adjustment means

31: brightness adjustment means

40, 41: control means

TECHNICAL FIELD The present invention relates to a lighting apparatus, and more particularly, to a flat lighting apparatus using an organic EL element as a light source apparatus.

Recently, flat-panel displays, which started to take the lead in liquid crystal displays (LCDs), have surpassed the Cathode Ray Tube (CRT), which has been the most used in the display field for decades, and recently, plasma display panels (PDP) and VFD ( Visual Fluorescent Display (FED), Field Emission Display (FED), Light Emitting Diode (LED), Organic Electro Luminescence (EL), etc., are widely used.

As the size of the flat panel display increases, the demand for the flat display device having less space occupancy increases, and the organic EL device attracts attention.

The organic EL device injects electrons and holes from the electron injecting electrode (Cathode) and the hole injecting electrode (Anode) into the light emitting layer made of an organic material, respectively. As a device using the phenomenon of emitting light when falling to the ground state, the research is actively conducted because of the advantage that can be driven at a low voltage of about 3V to 20V.

In addition, the organic EL device has excellent characteristics such as wide viewing angle, high speed response, and high contrast, so that it can be used as a pixel of a graphic display, a pixel of a television image display, or a surface light source. Because of its thinness, light weight, and good color, it is suitable for the next-generation flat panel display.

On the other hand, a lighting device is a device used to illuminate a light, and is generally used for lighting of interior and exterior lighting, vehicle interior lighting, lighting for facilitating work in industrial sites, and other electronic products. The lighting is widely used in everyday life, and its composition varies according to the needs of each use.

The general indoor lighting device is installed to emit light from the light source device to illuminate the room. Thus, the conventional light source device used indoors is mainly used fluorescent or incandescent light. In this case, the fluorescent lamp emits a fluorescent material applied to the inner surface by converting the ultraviolet light into visible light, and the incandescent lamp emits white light from a thin resistance wire (such as tungsten wire) formed in a glass or a glass filled with a special gas.

As shown in FIG. 1, the light source device A using the circular light source of the fluorescent lamp 1 and the light source device B using the point light source of the incandescent lamp 3 are a part of the light emitted to the outside. , 3) faces the back side.

Therefore, reflecting plates 2 and 4 are provided on the rear surfaces of the light source devices 1 and 3 to reflect the light emitted toward the rear surface through the reflecting plates 2 and 4 to increase the overall illuminance.

However, the lighting apparatus according to the related art described above has the following problems.

First, the illumination of the lighting device is increased by installing a reflector to prevent the light emitted from the light source facing the back. To this end, the reflector of the lighting device is installed at a constant distance from the light source so that the entire lighting device The volume and weight of increased.

In addition, the illuminance of the illumination device is changed according to the angle of the reflector, and the reflectance of light emitted from the light source device to the back is lowered due to the dust accumulated on the reflector when using the illuminator for a long time, thereby decreasing the illuminance of the entire illuminator.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a flat lighting device using an organic EL element that allows the product design (simple) and have a more uniform illumination. To provide.

In the flat lighting device using the organic EL device according to the present invention for achieving the above object is provided with a light source device for emitting light and emits light from the light source device to illuminate the object to be illuminated, red EL, EL and EL devices that emit light of different colors among green and blue EL elements, each of which emits monochromatic light by emitting light or a combination thereof, and the EL elements emitting light of different colors in a row Light source device arranged or arranged concentrically, and color and luminance adjusting means for adjusting color or overall luminance so as to be expressed in a single color for each color emitted from the red, green, and blue EL elements. It has its features.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

A preferred embodiment of a planar lighting apparatus using an organic EL element according to the present invention will be described with reference to the accompanying drawings.

2 is a view showing a planar lighting apparatus using an organic EL element according to the present invention, Figures 3 and 4 is a view showing an embodiment of a planar lighting apparatus using an organic EL element according to the present invention.

As shown in Fig. 2, the planar lighting apparatus using the organic EL element according to the present invention includes a light source device that emits light and emits light from the light source device to illuminate the illuminated object. The light source device is composed of organic EL elements 10 and 10 '.                     

Referring to the planar lighting apparatus using the organic EL device according to the present invention configured as described above in detail, as shown in Fig. 2 (A) and (B), a light source for emitting light for illuminating the object or the room Organic EL elements 10 and 10 'are used as the device.

The lighting apparatus of the present invention is composed of only one EL element emitting any color, such as a blue EL element, a red EL element, a green EL element, a yellow EL element, to form a monochromatic light source, or two or more EL elements. It can be configured to form a multi-color light source.

At this time, as shown in Fig. 3, the illuminating device formed of the multicolor light source is formed by arranging EL elements emitting different colors in a row (A) or concentrically (B).

Example

As shown in FIG. 4, the planar lighting apparatus using the organic EL element according to the present invention includes an organic EL element 20 that emits light and an organic EL element ( And color and brightness adjusting means 30, 31 for adjusting the color or brightness of 20, and control means 40, 41 for controlling on / off or various functions.

As shown in the figure, in an illuminating device such as a stand for illuminating an interior of a predetermined area, the organic EL element 20 is used as a means for emitting light.

In this case, the organic EL element 20 emits monochromatic light or polychromatic light, depending on the configuration, in order to adjust the color or overall luminance of the organic EL element 20 capable of expressing one or more of these colors. Adjusting means (30, 31).

Through the color and brightness adjusting means 30 and 31, the color and the brightness can be adjusted for each color, so that lighting of various colors of the lighting device can be represented.

For example, when the organic EL element 20 is composed of red, green, and blue EL elements, the amount of light of each EL element that emits red, green, and blue light through the color adjusting means 30 is appropriately determined. The organic EL element 20 emits light having a white level color when adjusted to. In addition, the luminance for each color may be adjusted using the luminance adjusting means 31.

The touch switch device 41 may perform a corresponding function through contact with a voice recognition device 40 or a contact terminal (touch sensor) (not shown) to perform a corresponding function on a specific sound. The control means 40, 41 provide on / off or various functions of the lighting device. Since the control means 40, 41 such as the voice recognition device or the touch switch device are well known technologies, detailed descriptions of the operations are omitted.

Therefore, this invention comprises the illumination device of a planar light source using an organic electroluminescent element for the illumination device for illuminating a to-be-illuminated object or an indoor light.

The flat lighting device using the organic EL device according to the present invention as described above has the following effects.

First, by using a bottom or top emission type organic EL element as a light source of the lighting device, the same configuration as that of the conventional reflector is not required, so that the product design is easier and the movement and installation are convenient. .

Second, by realizing a more perfect planar light source using the organic EL element as a light source of the illumination device, the area of light emitted from the planar light source can be greatly increased and the uniform illuminance of the entire illumination can be maintained.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (4)

A flat lighting device comprising: a light source device for generating light and color and brightness adjusting means for adjusting color and brightness of light generated from the light source device; The light source device Consists of two or more EL elements that emit light of different colors among the red, green, and blue EL elements, wherein the two or more EL elements are arranged in a row or concentric form to generate light of different colors, or a combination thereof It characterized in that to generate a single color of light, The color and brightness adjusting means And the overall brightness or color of the EL elements configured in the light source device so that the light source device composed of the two or more EL elements can express monochromatic light. delete delete delete

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