CN201050734Y

CN201050734Y - Light conducting board

Info

Publication number: CN201050734Y
Application number: CNU200720150548XU
Authority: CN
Inventors: 林志聪; 苏子文
Original assignee: JENG SHIANG PRECISION INDUSTRIAL Co Ltd
Current assignee: JENG SHIANG PRECISION INDUSTRIAL Co Ltd
Priority date: 2007-06-11
Filing date: 2007-06-11
Publication date: 2008-04-23
Anticipated expiration: 2017-06-11

Abstract

A light-guilding board includes a board body and a plurality of light-leading bodies approximately shaped as foursquare cones and distributed at the board body. Each light-leading body includes a taper hemiline approximately shaped as a rhombus and formed at the board body, a taper zenith provided a distance with the taper hemiline, a first ridge connecting the two first symmetrical ends of the taper hemiline and a second ridge connecting the two second symmetrical ends of the taper hemiline. The first and the second ridges both actually form an inverse-V shape. The line between the first symmetrical ends parallels to the direction of the beam incidence. The line between the second symmetrical ends is perpendicular to the direction of the beam incidence. The taper zenith locates at the intersection of the first and the second ridges. The light-leading bodies separately along both sides of the first and the second ridges lead most beams to be shoot along the angle of 55 to 75 DEG with the board body normal direction. The point distributed architecture can make the beams distributed evenly, improve the finished product rate and reduce the damage rate.

Description

LGP

Technical field

The utility model relates to a kind of LGP, particularly relates to a kind of LGP with a plurality of light conductors.

Background technology

General LGP is to be passed to opposite opposite side by the light that total reflection principle can penetrate a light source by this LGP one side guiding, and for light can be penetrated via an exiting surface of this LGP to form area source, etching is generally understood in the bottom surface of this LGP a plurality of reflections site, in order to destroy light total reflection path, and the formation scattering makes a light part be reflected this exiting surface.

Though, above-mentionedly can destroy light total reflection path in bottom surface of light guide plate etching reflection site, make light be penetrated this exiting surface and form area source, but etched reflection site is provided with inequality, not of uniform size, cause the at sixes and sevens scattering of light meeting, and cause energy loss, make light extraction efficiency not good.Therefore; LGP is now understood in the bottom surface usually and end face is provided with neat V-shaped groove; to destroy under the light total reflection path; light is concentrated and the minimizing energy loss; consult Fig. 1, Fig. 2; it is exactly this kind LGP; its be arranged at a plurality of can be irradiant light source 1 other; this LGP comprises a plate body 2, many first V-shaped grooves 3 that are arranged at these plate body 2 one sides and parallel rays incident direction; and many be arranged at this plate body 2 and be in reverse to this first V-shaped groove, 3 another sides, and second V-shaped groove 4 of actual vertical light incident direction.Under 2 cun LGP size, and the spacing of described first and second V-

shaped groove

3,4 between in twos respectively be about 0.1mm, and then described first V-shaped groove 3 has 300 approximately, and described second V-shaped groove 4 has 400 approximately.

Described first V-shaped groove 3 and described second V-shaped groove 4, though can destroy light total reflection path, and the angles that correcting part light concentrates on 30 degree penetrate, and still have following disappearance:

One, described first V-shaped groove 3 and described second V-shaped groove 4 are because of being list structure, so the not good place of indicative of local optical can't carry out the fine setting of thin portion, as sufficient in the brightness of close to sources place, the place's brightness of distance light source is then not enough, it is difficult to be compensated at the luminance shortage place, causes having the uneven defective of leaded light.

Two, form described first V-shaped groove 3 and second V-shaped groove, 4 employed moulds, it needs to use the Precision Machining cutting to form on making, so the processing distance causes processing failure ratio height, causes cost of manufacture also to improve relatively.

Three, because described first V-shaped groove 3 and second V-shaped groove 4 be list structure, thus when ejection formation the fraction defective height, and after ejaculation was finished, the scratch of easy generation strip caused having the high disappearance of damage probability in handling process.

The utility model content

The purpose of this utility model is to provide a kind of can leaded light even, improving fabrication yield, reduces cost of manufacture and damages the LGP of probability.

The utility model LGP is applicable to that at least one can irradiant light source, and comprises a plate body, it is characterized in that:

This LGP also comprises a plurality of light conductors, described light conductor roughly is quadrangular pyramid body and spot distribution in this plate body, each light conductor respectively comprises the awl base of this plate body that roughly assumes diamond in shape and be formed at, a conical point that is provided with at interval with this awl base,, these two first symmetrical end points in awl base of connection and in fact first crest line of parallel rays incident direction, and second crest line that connects these two second symmetrical end points in awl base, this is first years old, all in fact two crest lines constitute inverted V-shaped, on line between the described first symmetrical end points is the incident direction of parallel rays in fact, on line between the described second symmetrical end points is the incident direction of in fact vertical light, this conical point is positioned at the intersection point of this first crest line and second crest line, and this light conductor is that symmetry axis is symmetrical structure with this first crest line and second crest line, the geometric center on described again awl base is uniformly-spaced, and array is arranged in this plate body, described light conductor changes opticpath, and, guide most of light to penetrate along actual 55 degree to 75 angles of spending that are of normal direction with this plate body respectively along the both sides of described first crest line and described second crest line.

The beneficial effects of the utility model are the structure by this spot distribution, and light is evenly distributed, and improve fine ratio of product, also can reduce the damage probability.

Description of drawings

Fig. 1 is a stereogram, and a kind of in the past LGP is described;

Fig. 2 is a front view, illustrates that light penetrates the situation of this LGP;

Fig. 3 is a three-dimensional partial enlarged drawing, and one first preferred embodiment of the utility model LGP is described;

Fig. 4 is that of this first preferred embodiment looks up partial enlarged drawing;

Fig. 5 is a section handstand figure along Fig. 4 line V-V, illustrates that two light conductor reflection rays penetrate the situation of a plate body;

Fig. 6 be one along Fig. 4 line VI-VI analyse and observe handstand figure, light incident and the situation that penetrates this plate body are described;

Fig. 7 is the curve map of this first preferred embodiment, and all angles between light incident direction and this plate body normal direction are described, tests measured irradiant brightness;

Fig. 8 is the view of a similar Fig. 7, illustrates perpendicular to light incident direction and vertical all angles between two rightabouts of this plate body normal direction, tests measured irradiant brightness; And

Fig. 9 is the view that is similar to Fig. 6, and one second preferred embodiment of the utility model LGP is described.

The specific embodiment

Below in conjunction with accompanying drawing and preferred embodiment the utility model is elaborated:

Consult Fig. 3, Fig. 4 and Fig. 5, first preferred embodiment of the utility model LGP comprises a plate body 6 and a plurality of light conductor 7.

Described light conductor 7 roughly is quadrangular pyramid body and spot distribution in this plate body 6, and conical point that awl base 71, one that each light conductor 7 respectively comprises this plate body 6 that roughly assumes diamond in shape and be formed at and this awl base 71 are provided with at interval 72, one are connected first crest line 73 of 71 two the first symmetrical end points 711 in this awl base and this conical point 72, and one connects second crest line 74 that this bores 71 two the second symmetrical end points 712 in base and this conical point 72.In fact this first crest line 73 constitutes inverted V-shaped, and the on line that the described first symmetrical end points is 711 is the incident direction (by Fig. 4 left side direction incident to the right) of in fact parallel rays.In fact this second crest line 74 constitutes inverted V-shaped, and the online of 712 of the described second symmetrical end points is the incident direction of in fact vertical light.

This conical point 72 is positioned at the intersection point of this first crest line 73 and second crest line 74, and this light conductor 7 is that symmetry axis is symmetrical structure with this first crest line 73 and second crest line 74.

Described light conductor 7 spills are arranged at this plate body 6, and described awl base 71 is formed at this plate body surface, and its geometric center is all uniformly-spaced that the δ array is arranged in this plate body 6, and described first crest line 73, second crest line 74 all are positioned at this plate body 6 with conical point 72.Under 2 cun LGP sizes and δ=0.1mm situation, described light conductor 7 has 120000 (300 * 400) approximately.

Consult Fig. 4 and Fig. 5, described light conductor 7 can change opticpath, and can guide most of light to penetrate along actual 55 degree to 75 angle theta of spending that are of normal λ direction with this plate body 6 respectively along the both sides of described first crest line 73 with described second crest line 74.And described light conductor 7 is positioned at the α of insufficient light place (for example away between light source place or described light source) and forms big light conductor 75, be positioned at the bright and clear β of place and then form little light conductor 76, the surface area of described big light conductor 75 is greater than the surface area of described little light conductor 76, whereby, light conductor 75 can be assembled more light ejaculation and compensate for brightness greatly.

Consult Fig. 6 and Fig. 7, definition plate body 6 normal λ directions are 0 degree, the light incident direction is 90 degree, and the central point with this LGP is measured, the bold curve that its above downwards angle of visibility experiment records among its Illumination Distribution such as Fig. 7 is represented, its half illumination lighting angle obviously concentrates on (55 degree are between 75 degree) in 20 degree, and high-high brightness is up to 6000cd/m2, and its light localization effects is better than in the past 30 degree of LGP and concentrates.

Consult Fig. 5 and Fig. 8, definition plate body 6 normal λ directions are 0 degree, perpendicular to the light incident direction and vertically two rightabouts of these plate body 6 normal λ directions be respectively 90 the degree with-90 the degree, and the central point with this LGP is measured, it is represented with the bold curve that the experiment of visual angle, the left and right sides records among its Illumination Distribution such as Fig. 8, its half illumination lighting angle obviously concentrates on (55 degree are between 75 degree, and-55 degree are between-75 degree) in 20 degree.

Can learn by above-mentioned experimental data, the light that penetrates by the utility model concentrates on 55 degree mostly to ejaculation between 75 degree, its light localization effects is good, in addition, thin curve among Fig. 7,8 is the result that this LGP of expression is measured after diffusion sheet and the correcting of 3M light-collecting piece, can find out obviously that light can concentrate on the ejaculation of exiting surface vertical direction after correcting.

Consult Fig. 9, second preferred embodiment of the utility model LGP is roughly identical with this first preferred embodiment, its different place is that described light conductor 7 convexs are arranged at this plate body 6, described awl base 71 is formed at this plate body 6 surfaces, and described first crest line 73, second crest line 74 all are positioned at outside this plate body 6 with conical point 72.Whereby, can reach the most of light of correcting equally along being the purpose that 55 degree to the angle theta of 75 degree penetrate with the normal λ direction of this plate body 6 is actual.

This LGP has following beneficial effect:

One, described light conductor 7 is because of being spot distribution, so can be at the not in addition thin portion of Jia Chu fine setting of indicative of local optical, as at the sufficient place of close to sources brightness little light conductor 76 being set, luminance shortage place, distance light source then is provided with big light conductor 75 and is compensated, and therefore has the beneficial effect of even light-guiding.

Two, the Mold Making of described light conductor 7 also is to use Precision Machining, but because its machining shape is a spot distribution, so processing failure significantly reduces than regular meeting, and can not cause unnecessary waste and can save cost of manufacture.

Three, the structure of spot distribution, the rate that manufactures a finished product in the time of not only can promoting ejection formation, and the scratch chance is less in handling process, reduces the beneficial effect that damages probability so have.

Claims

1. a LGP is applicable at least one irradiant light source, and this LGP comprises a plate body, it is characterized in that:

2. LGP as claimed in claim 1 is characterized in that:

Described light conductor is divided into a plurality of big light conductors that are positioned at the insufficient light place, and a plurality of little light conductor that is positioned at bright and clear place, and the surface area of described big light conductor is greater than the surface area of described little light conductor.

3. LGP as claimed in claim 2 is characterized in that:

Described light conductor is spill and is arranged at this plate body, and described awl base is formed at this plate body surface, and described first crest line, second crest line and conical point all are positioned at this plate body.

4. LGP as claimed in claim 2 is characterized in that:

Described light conductor is convex and is arranged at this plate body, and described awl base is formed at this plate body surface, and described first crest line, second crest line and conical point all are positioned at outside this plate body.