KR101458671B1 - LED type flat panel display ads, and applied to the image of a rectangular shape with a aspherical lens - Google Patents

Abstract

The present invention relates to an aspherical lens having an image of a rectangular shape applied to an LED type advertisement and a flat display, and more particularly to an aspheric lens having a body of a predetermined size, a first lens portion and a second lens portion, Wherein the first lens portion and the second lens portion have a convex shaped exit surface as a top surface and a space portion in which an LED element can be positioned as a bottom surface and have concave incident surfaces, The width of the concave shape is small in the direction and the width of the concave shape is large in the longitudinal direction. The present invention having such a configuration is advantageous for an optical lens applied to an LED advertisement display by outputting incident light as rectangular shaped light.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an aspheric lens having an image of a rectangular shape applied to an LED type advertisement and a flat display,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an aspherical lens having an image of a rectangular shape applied to an LED type advertisement and a flat display, and more particularly to an aspheric lens having an aspherical shape and being applied to an LED display, .

2. Description of the Related Art Generally, a light emitting diode (LED) is an electro-optic conversion semiconductor device that produces a small number of injected carriers using a P-N junction structure of a semiconductor and emits light by recombination of the carriers. The emission wavelength depends on the kind of the impurity added to the semiconductor. For example, in the case of gallium phosphide, the emission involving zinc and oxygen atoms is red (wavelength 700 nm) and the emission involving nitrogen atoms is green (wavelength 550 nm). The light emitting diode is smaller in size than the conventional light source (light source), has a long life, and has low power and efficiency because the electric energy is directly converted into light energy.

LEDs, which are mainly used for light emitting display devices or low illumination light sources, have many advantages in terms of environmental friendliness, long life, low power consumption, color reproducibility, high efficiency luminescence and precision controllability. Recently, The application range is gradually increasing.

In recent years, such LEDs have been used in various display devices. Many lens technologies have been developed for optimizing the light output from LEDs and outputting them to the outside.

As a requirement of a lens to be applied to an LED device, it is necessary to output light satisfying various design values according to industrial fields. The lens can be used in various ways to more effectively visualize light output from a light source. Particularly, development of a lens capable of realizing the same light distribution efficiency while using less LED elements corresponding to a light source is being studied.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide an aspherical surface lens which can efficiently output light to a display device having various purposes using an LED device, The purpose of this paper is to provide

According to an aspect of the present invention, there is provided a zoom lens system including a body having a predetermined size, a first lens unit and a second lens unit both of which are disposed on both sides of the center of the body, Wherein the light guide plate has a convex shaped exit surface as an upper surface and a space portion in which an LED element can be positioned as a lower surface, and has a concave incident surface, wherein the incident surface has a concave shape with a small width in the transverse direction, Is characterized in that the width of the concave shape is made larger.

In addition, the body is characterized in that fixing projections and fixing holes are formed on both sides of the body for fixing to the external structure.

The first lens unit and the second lens unit may be integrally formed with the body.

It is preferable that the exit surface and the entrance surface satisfies the condition that the cross-sectional spherical surface of the exit surface with respect to the lateral direction satisfies 2.5 <R <3.5 and -1 <-0.1, and the cross-sectional spherical surface of the incident surface satisfies 0.45 <R <0.7 , -1.2 < -0.9.

The exit surface and the entrance surface satisfy the condition that the cross-sectional spherical surface of the exit surface with respect to the longitudinal direction satisfies the condition of 2.5 <R <4, -1 <k <1, and the spherical surface of the entrance surface satisfies 1.5 <R <3 , And -3 < k < -0.1.

The first lens unit and the second lens unit are designed such that the aspherical surface satisfies the following equation.

[Mathematical Expression]

(Where H is the distance in the vertical direction on the optical axis, Z is the distance from the tangential plane of the aspheric vertex to the height H on the aspheric surface, R is the radius of curvature at the apex of the aspherical surface, k is the conic constant).

The present invention, which is constituted and operated as described above, is advantageous as an advertising display lens using an LED element by changing the circular light distribution output from the LED element to a rectangular shape.

In addition, there is an advantage that the number of LED elements can be reduced by outputting a rectangular image.

1 is a plan view of an aspheric lens having an image of a rectangular shape applied to an LED type advertisement and a flat display according to the present invention,
2 is a side view of an aspherical lens according to the present invention,
3 is a front view of an aspherical lens according to the present invention,
4 is a perspective view of an aspherical lens according to the present invention,
FIG. 5 is a rear perspective view and an incision oblique view of an aspherical lens according to the present invention,
6 is a cross-sectional view of a lens portion according to the present invention,
7 is a longitudinal sectional view of a lens portion according to the present invention,
8 is a graph showing the orientation angle of an aspherical lens according to the present invention,
9 is a graph of light distribution of an aspherical lens according to the present invention,
10 is a view for explaining light distribution according to application of an aspherical lens according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an aspheric lens having an image of a rectangular shape applied to an LED type advertisement and a flat display according to the present invention will be described in detail with reference to the accompanying drawings.

The aspherical lens having an image of a rectangular shape applied to the LED type advertisement display according to the present invention includes a body having a predetermined size, a first lens portion and a second lens portion which are respectively formed on both sides of the center of the body, Wherein the first lens unit and the second lens unit have a convex-shaped emission surface on an upper surface and a space portion in which an LED element can be positioned as a lower surface, and have concave incident surfaces, the incident surfaces being concave The width of the shape is small and the width of the concave shape in the longitudinal direction is large.

The aspherical lens having an image of a rectangular shape applied to the LED type advertisement display according to the present invention has a pair of identical lens units, that is, a first lens unit 110 and a second lens unit 120, Each of the lens portions has a convex shape on the upper side (light emitting surface) and a concave shape on the lower side (light incident surface).

1 is a plan view of an aspherical lens having an image of a rectangular shape applied to an LED type advertisement display according to the present invention. The aspherical lens according to the present invention includes a body 100 having a predetermined size, and a first lens unit and a second lens unit are formed on both sides with respect to the center of the body.

The first lens portion and the second lens portion have the same design value, and are convex in the light exit surface and concave in the light incident surface.

FIG. 2 is a side view of an aspherical lens according to the present invention, and FIG. 3 is a front view of an aspherical lens according to the present invention.

A fixing hole 130 and a fixing protrusion 140 are formed on both sides of the body 100 so as to be fixed to the outer structure. More specifically, the fixing holes are formed in a diagonal direction, that is, in an asymmetrical direction And the fixing protrusion has a structure protruding by a predetermined size toward the lower side of the body, and is designed to prevent the lens from flowing when the lens is mounted on the outer structure. The fixing hole and the fixing protrusion are not limited to the shape for simply fixing the lens, and it is easy for a person skilled in the art to variously change the design for the fixing structure.

FIG. 4 is a perspective view of an aspherical lens according to the present invention, and FIG. 5 is a rear perspective view and an incisional perspective view of an aspherical lens according to the present invention.

The first lens unit and the second lens unit formed on the body have the same design value, and the first lens unit and the second lens unit, which are arranged at regular intervals, are optimized for the light output efficiency of the LED device emitting light in the LED display Respectively.

Fig. 6 is a cross-sectional view of the lens portion according to the present invention, and Fig. 7 is a longitudinal sectional view of the lens portion according to the present invention.

As described above, the first lens unit 110 and the second lens unit 120 are designed to have the same design value. In the first lens unit 110, the exit surface 111, which is the surface on which light is emitted, has a convex shape, and the incident surface 112 on which the light is incident has a concave shape. Referring to FIGS. 6 and 7, the width of the incident surface is formed to be smaller than the cross-sectional area with respect to the longitudinal direction. In other words, the width of the concave shape is formed to be larger in the longitudinal direction than in the lateral direction.

Similarly, the exit surface 121 and the incident surface 122 of the second lens unit have the same shape as the first lens unit, as they have the same design value as the first lens unit.

At this time, the exit surfaces 111 and 121 and the incident surfaces 112 and 122 are designed to satisfy the following aspherical surface conditions.

Wherein the aspherical surface of the first lens unit and the second lens unit is designed to satisfy the following equation (1): &quot; (1) &quot;

(Where H is the distance in the vertical direction on the optical axis, Z is the distance from the tangential plane of the aspheric apex to the height H on the aspheric surface, R is the radius of curvature at the apex of the aspherical surface, k is the conic constant).

More specifically, first, the spherical surface of the exit surface with respect to the transverse direction satisfies the condition of 2.5 <R <3.5, -1 <-0.1, and the spherical surface of the incident surface satisfies 0.45 <R <0.7, -1.2 < -0.9 are satisfied. (Where R is the radius of curvature at the aspheric apex, k is a conic constant).

In the longitudinal direction, the exit surface and the entrance surface satisfy the condition that the cross-sectional spherical surface of the exit surface with respect to the longitudinal direction satisfies 2.5 <R <4, -1 <k <1, R <3, and -3 <k <-0.1.

FIG. 8 is a graph of the orientation angle of an aspherical lens according to the present invention, and FIG. 9 is a graph of light distribution of an aspherical lens according to the present invention. In the aspherical lens of the present invention, which is designed to satisfy the above-described conditions, the light emitted from the LED element outputs a rectangular-shaped light. Accordingly, it is possible to improve the light-emitting efficiency when used in a display for a jade or advertisement using an LED device, thereby reducing the number of LEDs and achieving uniformity through an aspherical lens.

10 is a view for explaining light distribution according to application of an aspherical lens according to the present invention. As shown in the figure, when the conventional lens is applied, the LED light is superimposed on the light because the light is circular, and the light output is not efficient. In order to make the light distribution uniform, the lens must be arranged very densely.

However, in the case of the present invention, since the light distribution has a rectangular shape, the light distribution can be made uniform without the superimposed light, thereby reducing the number of lenses.

According to the present invention configured as described above, the light distribution can be configured to be very uniform by outputting rectangular image light, and the number of LED elements or the number of lenses can be advantageously reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. On the contrary, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

100: Body
110: first lens unit
111: exit surface
112: incident side
120: a second lens portion
121: exit surface
122: incident surface
130: Fixing hole
140: Fixing projection
200: LED element

Claims (6)

A body of a predetermined size;
And a first lens unit and a second lens unit, both of which are disposed on both sides of the center of the body,
Wherein the first lens unit and the second lens unit have a convex shaped exit surface as a top surface and a space portion in which an LED element can be positioned as a lower surface,
The second lens surface has a concave shape with a small width in the transverse direction and a concave shape with a large width in the longitudinal direction,
The first lens unit and the second lens unit,
An aspheric lens having an image of a rectangular shape applied to an LED type advertisement and a flat display, wherein the aspheric surface is designed to satisfy the following equation.
[Mathematical Expression]

(Where H is the distance in the vertical direction on the optical axis, Z is the distance from the tangential plane of the aspheric apex to the height H on the aspheric surface, R is the radius of curvature at the apex of the aspherical surface, k is the conic constant). [2] The apparatus of claim 1,
And a fixing protrusion and a fixing hole for fixing the fixing member to the outer structure are formed on both sides, respectively, and an aspheric lens having a rectangular shape image applied to the LED type advertisement and the flat display. 2. The zoom lens according to claim 1, wherein the first lens unit and the second lens unit comprise:
An aspheric lens having an image of a rectangular shape applied to an LED type advertisement and a flat display integrated with the body. The light-emitting device according to claim 1,
The spherical surface of the exit surface with respect to the transverse direction satisfies the condition of 2.5 <R <3.5 and -1 <-0.1, and the spherical surface of the incident surface satisfies the condition of 0.45 <R <0.7, -1.2 <-0.9 An aspheric lens having an image in the form of a rectangle applied to an LED type advertisement and a flat display.
(Where R is the radius of curvature at the aspheric apex, k is a conic constant). The light-emitting device according to claim 1,
Wherein the spherical surface of the exit surface with respect to the longitudinal direction satisfies the condition of 2.5 <R <4, -1 <k <1 and the spherical surface of the incident surface satisfies the condition of 1.5 <R <3, -3 <k < An aspheric lens having an image in the form of a rectangle applied to an LED-type advertisement and a flat display designed to satisfy the following condition: delete

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