SK50092012A3 - Light panel with the planar LED illumination its frontal surface - Google Patents

Abstract

Light panel comprising at least one pair opposite oriented LED strip lamps (1), between the opposite oriented LED strip lamps (1) is placed in the middle point the scattering light element (2) having full or partial oval or circle cross-section, the axis (3) of the scattering light element (2) is parallel with the longitudinal axis (4) the LED lamp (1).

Description

Technical field

The invention relates to a design of a light panel with an LED diode plane illumination of its front advertising or information area. The invention generally falls within the lighting technology, particularly in the advertising field.

BACKGROUND OF THE INVENTION

For the illumination of small information and directional signs and panels, frame constructions are known in the prior art with the arrangement of LEDs along the circumference of these constructions as described in published US patent application 2004/0095741. In the direction of the light emitting of the LEDs a transparent element is inserted, into which the light enters in one plane and in a plane perpendicular it is diffuse emitted out of the light panel. Also, in U.S. Patent Application Publication 2002/0043012, a light guide plate with a bevelled tapered cross-section is included in the direction of LED light emission, into which the light enters in one plane and in a plane perpendicular is reflected and diffuse emitted out of the light panel through another transparent layer. . These light panel designs have limitations because they are limited in particular by the construction of the transparent element itself, the light guide plate, with respect to the attenuation of light intensity. Therefore, the light panel designs are only suitable for small lengths. These systems are unsuitable for large-scale billboards.

In the field of advertising, there is known a box construction of light panels with a front advertising surface on a stretched foil or sheet and a rear bottom. Known from the prior art is a light panel with a peripheral frame structure with LEDs described in Slovak patent SK 287 744. The LEDs are disposed on the inside of the peripheral frame structure with light emitting in an illuminating plane parallel to the plane of the transparent overlap so that the direction of their light emission is only the air environment without any optical or other element.

Large-scale advertising light panels with a planar circumferential illumination system with LEDs with an illumination plane parallel to the transparent overlap plane create an uneven distribution of illumination on the illuminated advertising surface. This effect is due to the LED emitting angle, which causes the edge portions of the illuminated area to be illuminated, with the central portion of the illuminated area being darker.

The above-mentioned shortcomings have led to the development of a planar-illuminated light panel with an LED system where the radiated luminous flux would be evenly distributed over the illuminated surface. As a result of this effort, a light panel with LED diode plane illumination of its front surface is realized by the technical means further described in the present invention.

SUMMARY OF THE INVENTION

The aforementioned drawbacks are substantially eliminated by a light panel with an LED planar evenly illuminating its front surface, which is an advertising or information film or sheet. In this case, the light panel is further formed by a frame or box construction with a rear overlap and a light emitting of the LEDs in an illumination plane parallel to the plane of the face. The essence of a light panel with LED diode planar uniform illumination of its front surface consists in that it comprises at least one pair of facing LED strip lamps, where at least one facing LED strip lamps has a light diffusing element with a full diffuser between them or a partial oval or circular cross-section such that the axis of the light diffusing element is parallel to the longitudinal axis of the LED strip lamps. This arrangement gives the possibility of constructing a light panel with an LED planar evenly illuminating its front surface with only one pair of opposing LED strip lamps usually attached to the rear overlap on the sides of the light panel, which is suitable for medium-sized light panels.

For large light panels it is possible to design them, where two pairs of LED leds facing each other are arranged side by side. Then, the light diffuser element is positioned above the central LED strip lamp of the first pair and the central LED strip lamp of the second pair. An essential feature of the solution to achieve the desired effect is a light diffusing element to be white and to have a matt surface. The shape of the light diffusing element is also important. For this purpose the tube is best suited. However, it can also be a bar with a circular cross-section. These shapes are suitable when applied separately. For the realization of larger light panels, when two pairs of LED strips facing each other are arranged side by side, where the light diffuser element is located above the central LED leaf lamp of the first pair and the central LED lamp of the second pair, then it is preferred that the light the diffusing element is an oval strip. Alternatively, the central LED strip lamp of the first pair may be inclined by an angle of 1 to 10 ° relative to the central LED strip lamp of the second pair.

The advantages of a light panel with LED diode planar even illumination of its front surface with a peripheral frame or box structure according to the present invention are that it achieves a uniform illumination of the front surface without center areas of lower brightness.

BRIEF DESCRIPTION OF THE DRAWINGS

A light panel with LED diode plane illumination of its front face with a peripheral frame or box structure according to the present invention will be more clearly illustrated by the figures. In FIG. 1, a mid-length light panel with one pair of LED strip lamps is shown in a top and side view. In FIG. 2, a larger length light panel with two pairs of LED strip lamps is shown in a top and side view. In FIG. 3 shows a side panel of a larger length of light with two pairs of LED strip lamps, wherein the internal LED strip lamps are diverted from each other. In FIG. 4 shows the attenuation curve of the illumination intensity and the illumination intensity curve without attenuation.

It is to be understood that the various embodiments of the invention shown in the individual figures are presented by way of illustration and not as limitations on particular embodiments of the invention.

It is understood that a light panel with LED diode plane illumination of its front face with a peripheral frame structure according to the invention is made by methods and materials known to those skilled in the art.

Those skilled in the art will find or be able to ascertain using no more than routine experimentation many equivalents to specific embodiments of the invention. Such equivalents will also fall within the scope of the following claims.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

In this example of a particular embodiment, a light advertising panel with a LED diode planar uniform illumination of its front face with a box structure of a medium size light advertising panel as shown in FIG. 1. A flexible foil with an advertising motif is stretched on the face. The illuminated advertising panel further comprises one pair of oppositely oriented LED batten luminaires also mounted on the rear overlap at the inner lateral sides of the box structure. The LED strip lights 1 are mounted so as to form a single illuminating plane which is parallel to the plane of the face. A light diffusing element 2 with a circular cross-section is arranged in the middle distance between the LED strips 1 facing each other. The light diffusing element 2 is mounted in the upper and lower frame of the box structure in the illumination plane. The light diffusing element 2 has a matt white finish. It is fitted so that the axis 3 of the light diffuser element 2 is parallel to the longitudinal axis 4 of the LED light fixtures X Achieving the desired light effect in the uniformity of illumination of the entire illuminated surface with the LED light the utility pattern is shown by line B in the graphical dependence shown in FIG. 4. There is an apparent difference from curve A showing the decrease in illumination in the central region of the LED panel with its planar surface illumination without the use of the light diffuser element 2.

Example 2

In this example of a particular embodiment, the construction of a light advertising panel with LED diode plane illumination of its front face with a cabinet construction of a light advertising panel of a larger size as shown in FIG. 2. A flexible foil with an advertising motif is stretched on the front surface. The illuminated advertising panel further comprises two pairs of opposed LED leaf lamps 1 mounted on the rear overlap at the inner side sides of the box structure. The LED strip lights 1 are mounted so as to form a single illuminating plane which is parallel to the plane of the face. The light diffuser element 2 is located above the central LED leaf light 1 of the first pair and the central LED strip light 1 of the second pair. In this case, the light diffusing element 2 has the shape of an oval strip. The light diffusing element 2 has a matt white finish. It is mounted so that the axis 3 of the light diffuser element 2 is parallel to the longitudinal axis 4 of the LED lamps 1.

Example 3

In this example of a particular embodiment, the construction of a light advertising panel with LED diode plane illumination of its front face with a cabinet construction of a light advertising panel of a larger size as shown in FIG. 3. A flexible foil with an advertising motif is stretched on the face. The illuminated advertising panel further comprises two pairs of opposing LED strip lights 1 mounted on the rear overlap at the inner lateral sides of the box structure. The LED strip lights 1 are mounted so as to form a single illuminating plane that is parallel to the plane of the face. The light diffusing brew 2 is located above the central LED strip light 1 of the first pair and the central LED strip light 1 of the second pair. In this case, the light diffusing element 2 has the shape of an oval strip. The light diffusing element 2 has a matt white finish. It is mounted in such a way that the axis 3 of the light diffuser element 2 is parallel to the longitudinal axis 4 of the LED strip 1.

»((

f <* s I t (’

Industrial usability

The light panel with LED diode plane illumination of its face according to the present invention is a technology useful in advertising, information, orientation or guidance transport systems.

Claims (6)

PATENT CLAIMS 1. A light panel having an LED planar uniform illumination of its front surface, consisting of a frame or box structure with a rear overlap and light emitting LEDs in an illuminating plane parallel to the plane of the front surface, characterized in that it comprises at least one a pair of facing LED strip lamps (1), wherein at least between one facing LED strip lamps (1), a light diffusing element (2) with a full or partial oval or circular cross-section is arranged at a central distance therebetween so that the axis ( 3) the light diffuser element (2) is parallel to the longitudinal axis (4) of the LED strip lamps (1). Light panel with LED diode plane illumination of its front surface according to claim 1, characterized in that it comprises juxtaposed two pairs of opposite LED strip lamps (1), whereby the light diffusing element (2) is located above the LED leaf a lamp (1) of the first pair and an LED strip lamp (1) of the second pair. Light panel with LED diode plane illumination of its front surface according to at least one of claims 1 and 2, characterized in that the light diffusing element (2) has a white matt surface. Light panel with LED diode plane illumination of its front face according to at least one of claims 1 to 3, characterized in that the light diffusing element (2) is a tube. Light panel with LED diode plane illumination of its front surface according to at least one of claims 1 to 4, characterized in that the light diffusing element (2) is an oval strip. A LED panel with a plane uniform illumination of its front surface according to claim 1 and 2, characterized in that the central LED strip light (1) of the first pair is inclined by a vertical angle relative to the central LED strip light (1) of the second pair. angle 1 to 10 °.