CN203909330U

CN203909330U - Novel light guide plate

Info

Publication number: CN203909330U
Application number: CN201420217161.1U
Authority: CN
Inventors: 王恩辉; 王涛; 王温暖
Original assignee: Qingdao Joinset Science & Technology Co Ltd
Current assignee: Qingdao Zhuo Ying Polytron Technologies Inc
Priority date: 2014-04-30
Filing date: 2014-04-30
Publication date: 2014-10-29
Anticipated expiration: 2024-04-30

Abstract

Provided is a novel light guide plate, comprising a substrate. A plurality of V-shaped slots are arranged on a front side of the substrate at equal intervals to form continuous trapezoid structures on an upper surface of the substrate. A back side of the substrate is provided with a plurality of screen dots and is pasted with a reflective film; the front side of the substrate is also pasted with a printing film capable of being printed with patterns. An angle of each V-shaped slot is 90 DEG -120 DEG; a distance between adjacent V-shaped slots is 40 [mu]m; a slot depth of each V-shaped slot is 15 [mu]m. According to the utility model, the V-shaped slots are utilized to form continuous trapezoid structures on the upper surface of the substrate; the continuous trapezoid structures play a role of diffusion sheets and prism sheets to realize light scattering and total reflection, and thereby the screen dots are difficult to observe by naked eyes, overall brightness of the light guide plate is uniform, and overall visual effects of an area light source are improved; the light guide plate does not need to be provided with diffusion sheets and prism sheets, thereby reducing an overall thickness of the area light source, materials and overall production cost.

Description

Light guide plate

Technical field

The utility model relates to lighting device, specifically, is a kind of light guide plate of area source.

Background technology

LED area source is the one of LED light source, has long, the luminous feature such as evenly of life-span, by LED lamp, light is injected from the side of light guide plate, then is allowed light penetrate from the front of light guide plate by the site of light guide plate, reaches the effect of illumination.Because light guide plate is provided with site, while making illuminated by surface light source, naked eyes can very easily be observed the existence of site, the visual effect of influence surface light source entirety, and only depending on site to change the direction of light, light is too concentrated, makes area source overall brightness inhomogeneous, need in light guide plate, increase again diffusion sheet and prismatic lens for this reason, increase thickness and the production cost of area source entirety.

Utility model content

The utility model, for the light guide plate of current area source, easily demonstrates site, and light is too concentrated, brightness irregularities, and the problem such as thickness is large, production cost height, has designed a kind of new light guide plate.

This light guide plate, comprise substrate, the positive equi-spaced apart of substrate is provided with several V-shaped grooves, make the upper surface of substrate be continuous trapezium structure, the back side of substrate is provided with several sites, also posts reflectance coating on the back side of substrate, print film that can printed patterns is also posted in the front of substrate, the angle of V-shaped groove is 90 °～120 °, and the spacing between V-shaped groove is 40 μ m, and the groove depth of V-shaped groove is 15 μ m.

The beneficial effects of the utility model are: light guide plate utilizes V-shaped groove to make upper surface be trapezium structure, and these trapezium structures can play the effect of diffusion sheet and prismatic lens, make light scattering and total reflection, allow naked eyes be difficult to observe the existence of site, also make the brightness of light guide plate entirety even, improve the visual effect of area source entirety, need not in light guide plate, add again diffusion sheet and prismatic lens, reduce the thickness of area source entirety, also reduce the use of material, reduced overall production cost.The print film that light guide plate upper surface posts, has not only played the effect of protection light guide plate surface structure, and also printed patterns thereon makes to improve the stereoscopic sensation of the light that light guide plate sends, and increases the aesthetic feeling of area source entirety.The reflectance coating that substrate back pastes can be by the light returning because of total reflection secondary reflection again, it is all penetrated from light guide plate is positive, increased the brightness of light guide plate entirety, the while also makes light multiple reflections and advances along light guide plate length direction, and light is uniformly distributed and outgoing in light guide plate.V-shaped groove is selected angle, the spacing of 40 μ m and the groove depth of 15 μ m of 90 °～120 °, makes light guide plate again in the situation of change structure, still keeps good penetrability, makes as much as possible area source keep larger brightness.

Brief description of the drawings

The structural drawing that accompanying drawing 1 is this light guide plate.

Embodiment

Light guide plate of the present utility model, as shown in Figure 1, comprise substrate 1, the positive equi-spaced apart of substrate 1 is provided with several V-shaped grooves 2, makes the upper surface of substrate 1 be continuous trapezium structure, the back side of substrate 1 is provided with several sites 3, on the back side of substrate 1, also post reflectance coating 4, print film 5 that can printed patterns is also posted in the front of substrate 1, and the angle of V-shaped groove 2 is 90 °～120 °, spacing between V-shaped groove 2 is 40 μ m, and the groove depth of V-shaped groove 2 is 15 μ m.

Trapezium structure can be used as the prism that has removed drift angle, allows substrate 1 upper surface play the effect of a part of prismatic lens, makes a part of light from the side-scattered of trapezium structure out, makes site obfuscation.Trapezium structure has also increased the quantity of internal edges, the light of 50% left and right is totally reflected, these light directive reflectance coatings 4 that are totally reflected, and be reflected film 4 and be reflected back trapezium structure, be reflected back in the light of trapezium structure, there is again the light of 50% left and right again by trapezium structure total reflection, according to this rule, allow light multiple reflections in light guide plate, be wavy travel track, thereby light is advanced along the length direction of light guide plate, and from light guide plate, penetrate gradually, make the light of ejaculation more even.

The increase of V-shaped groove angle, can make the luminous flux of light guide plate first increase and then reduce, and the illuminance of the light penetrating from light guide plate also can first increase and reduce, and the angle of 90 °～120 ° can make luminous flux and illuminance all be in large as far as possible value.And the increase of spacing between V-shaped groove 2 will reduce the density of trapezium structure, thereby reduce the luminous flux of light guide plate, the spacing of 40 μ m can make the luminous flux of light guide plate be in large as far as possible value.

Claims

1. a light guide plate, it is characterized in that, comprise substrate (1), the positive equi-spaced apart of substrate (1) is provided with several V-shaped grooves (2), make the upper surface of substrate (1) be continuous trapezium structure, the back side of substrate (1) is provided with several sites (3), on the back side of substrate (1), also post reflectance coating (4), print film (5) that can printed patterns is also posted in the front of substrate (1), the angle of V-shaped groove (2) is 90 °～120 °, spacing between V-shaped groove (2) is 40 μ m, the groove depth of V-shaped groove (2) is 15 μ m.