TWM467796U - Optical element - Google Patents

Description

Optical element

The present invention relates to an optical component, and more particularly to an optical component that can reduce the halo phenomenon.

In the LED TV's backlight module, it is constantly evolving in the direction of large size, light weight, thin thickness, narrow frame design, high performance, high taste, low cost and environmental protection. The multi-element of design has become the development trend of LED TV backlight modules in recent years. However, as the liquid crystal display market becomes more mature, the improvement of performance and cost reduction have become the most competitive technologies in the liquid crystal display industry. Among the LED TV backlight modules, there are mainly direct-lit and edge-lit backlights. At present, most of the large-size and thin-type models are designed with side-lit backlights, but the larger the area, the more difficult it is to use the light guides. High, the cost of a thinner model that results in a larger size cannot be reduced.

Therefore, returning to the direct-type backlight, how to meet the needs of large-sized thin-shaped models, and to solve the technical problem of large-scale thinning with low cost technology, is one of the current research and development priorities of the industry.

In the case of the conventional direct-lit backlight light-emitting diode, since the optical element corresponding to the light-emitting diode contains the fluorescent powder, There is a yellow halo phenomenon, which makes the visual effect of the large-sized thinned LED TV not good enough to meet the market demand.

Therefore, the object of the present invention is to provide an optical element which can reduce the halo phenomenon.

Therefore, the novel optical component is suitable for a corresponding LED mounting arrangement, the optical component includes a light incident surface, and a light exiting surface, the light incident surface includes a flat portion and an concave chamber, the concave chamber is located at the flat In the center of the portion, the light-emitting diode is disposed corresponding to the concave chamber, and the inner side surface of the concave chamber is a roughened surface, and the light-emitting surface is disposed opposite to the light-incident surface and has an arc-shaped curved surface, and the concave chamber is in a class The recess includes a small diameter portion, a large diameter portion adjacent to the small diameter portion and the flat portion, and a shoulder edge between the small diameter portion and the large diameter portion, the width of the light emitting diode It is smaller than the outer edge of the large diameter portion.

In the optical component of the present invention, the light exiting curved surface includes a concave portion formed at the center and recessed toward the light incident surface, and an annular convex portion surrounding the concave portion.

In the optical element according to the present invention, the large diameter portion of the recess is arcuate, and the arcuate direction of the shoulder edge toward the flat portion is first dropped upward.

The optical component of the present invention, wherein the shoulder edge is slightly higher than the height of the flat portion.

In the optical element of the present invention, the height of the shoulder is the same as the flat portion.

The effect of the novel optical component is that a roughened surface is formed through the inner surface of the concave cavity, so that the optical characteristics of the light extraction can be improved, and the light having a larger emission angle of the light-emitting diode is appropriately refracted by the large diameter portion. The original yellow halo phenomenon is reduced, and the purpose of improving the optical characteristics of the light is indeed achieved, so that the novel optical element can be more preferably applied to a large-sized thinned LED television.

1‧‧‧Optical components

11‧‧‧Into the glossy surface

111‧‧‧ Flat section

112‧‧ ‧ alcove

113‧‧‧Little Trails Department

114‧‧‧The Great Trails Department

115‧‧‧ shoulder

12‧‧‧Light surface

121‧‧‧ recess

122‧‧‧Ring convex

2‧‧‧Lighting diode

Other features and advantages of the present invention will be apparent from the following description of the drawings. FIG. 1 is a perspective view showing a first preferred embodiment of the present optical element; FIG. 2 is a cross-sectional view illustrating A light incident surface and a light exiting curved surface of the first preferred embodiment, the inner side surface of the concave chamber is a roughened surface; and FIG. 3 is a cross-sectional view showing a second preferred embodiment of the novel optical component.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, the first preferred embodiment of the present optical element 1 is adapted to be mounted corresponding to a light-emitting diode 2, the optical element 1 comprising a light-incident surface 11, and a light-emitting surface 12.

The light incident surface 11 includes a flat portion 111 and an alcove 112, the concave chamber 112 is located at the center of the flat portion 111, and the light emitting diode 2 is disposed in a pair of recesses 112, the inner side of the recess 112 is a roughened surface, and therefore, the optical characteristics of the light emitted by the light-emitting diode 2 after the roughened inner side of the recess 112 It will become more uniform and effectively improve the phenomenon of yellow halo.

Further, in the first preferred embodiment, the recess 112 has a class shape, and the recess 112 includes a small diameter portion 113 and a large adjacent portion between the small diameter portion 113 and the flat portion 111. a diameter portion 114, and a shoulder 115 between the small diameter portion 113 and the large diameter portion 114, the shoulder edge 115 is slightly higher than the height of the flat portion 111, and the width of the light emitting diode 2 is smaller than the large diameter portion The outer edge of 114, therefore, the light outside the light-emitting diode 2 can improve the phenomenon of yellow haze by the roughened surface of the large diameter portion 114.

Therefore, the conventional light output has a yellow halo phenomenon due to the relationship of the phosphor powder, and the visual effect of the large-sized thinned LED TV is not good enough to meet the market demand, and after the improvement of the new model, the improvement can be surely improved. The visual effect of the thinned LED TV.

The degree of roughening of the concave portion 112 near the flat portion 111 is greater than the degree of roughening near the top end. The focus of the foregoing design is that, as the angle of illumination of the light-emitting diode 2 is larger, the phenomenon of yellow haul is more serious, and therefore, the present invention further enhances the degree of roughening of the concave chamber 112 near the flat portion 111, The optical characteristics of the light emitted from the tip end of the light-emitting diode 2 through the recess 112 are not adversely affected.

The light-emitting surface 12 is disposed opposite to the light-incident surface 11 and has a substantially arc-shaped curved surface. The light-emitting curved surface 12 includes a concave portion 121 formed at the center and recessed toward the light-incident surface 11 , and a surrounding portion around the concave portion 121 . ring The convex portion 122 is formed.

The second preferred embodiment of the novel optical component 1 is substantially identical to the first preferred embodiment, except that the height of the shoulder 115 of the second preferred embodiment is the same as that of the flat portion 111, thereby being effective Improve the phenomenon of yellow halos.

In summary, the optical element 1 of the present invention has the effect of forming a roughened surface through the inner surface of the recess 112, thereby improving the optical characteristics of the light, reducing the original halo phenomenon, and allowing the large diameter portion 114 to The light of the large emitting angle of the light-emitting diode 2 is appropriately refracted, and the optical optical property is improved, so that the optical element 1 of the present invention can be more preferably applied to a large-sized thinned LED television. Achieve the purpose of this new type.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

1‧‧‧Optical components

11‧‧‧Into the glossy surface

111‧‧‧ Flat section

112‧‧ ‧ alcove

113‧‧‧Little Trails Department

114‧‧‧The Great Trails Department

115‧‧‧ shoulder

12‧‧‧Light surface

Claims (5)

An optical component is adapted to be disposed corresponding to a light emitting diode, the optical component comprising: a light incident surface, the light incident surface comprising a flat portion and an concave chamber, the concave chamber being located at a center of the flat portion, the light emitting The diode is disposed corresponding to the recess, the inner side of the recess has a roughened surface, and the recess has a class shape, and the recess includes a small diameter portion and a large adjacent portion between the small diameter portion and the flat portion a diameter portion, and a shoulder edge between the small diameter portion and the large diameter portion, the width of the light emitting diode is smaller than an outer edge of the large diameter portion; and a light emitting surface, the light emitting surface is opposite to the light incident surface and A rough arc surface. The optical component of claim 1, wherein the light exiting curved surface comprises a concave portion formed at a center and recessed toward the light incident surface, and an annular convex portion surrounding the concave portion. The optical element according to claim 1, wherein the large diameter portion of the recess is arcuate, and the arcuate direction of the shoulder portion faces upward and then falls upward. The optical component of claim 1, wherein the shoulder edge is slightly higher than the height of the flat portion. The optical element of claim 1, wherein the height of the shoulder is the same as the flat portion.