CN102207578A

CN102207578A - Light guide plate

Info

Publication number: CN102207578A
Application number: CN2011101589166A
Authority: CN
Inventors: 周玉龙; 李晓成
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-14
Filing date: 2011-06-14
Publication date: 2011-10-05

Abstract

The invention discloses a light guide plate, which comprises a platy main body. The back surface of the main body consists of a slope surface inclining towards the front surface of the main body and at least one smooth surface parallel with the front surface of the main body; and the smooth surface is connected with the slope surface, and the slope surface is approximately adjacent to one side of the main body. Compared with a transmission lamp, the light guide plate has the advantages that: when glare is absent, the luminous efficiency can be effectively improved under a light source with the same power; in addition, due to the slope surface 13, partial materials for the lamp or the light guide plate of the same signal are saved; therefore, the light guide plate also has the advantages of saving the materials and cost.

Description

A kind of light guide plate

Technical field

The present invention relates to lighting field, relate in particular to a kind of light guide plate.

Background technology

Light guide plate can be drawn the light that sends from light source as a kind of optics sheet material, and passes through backside reflection, and then light is penetrated from the front, to arriving evenly luminous effect.Because the characteristic of light guide plate, just point, line source change area source into, and its ultra-thin light, light is even, energy-efficient and stablize durablely, more and more drop into display screen and device, field of illuminating lamps at present.

The lighting of transmission, structure comprises shell, light source and reflection shield, light source luminescent reflects by reflection shield, and then from the front illuminated of shell and throw light on, wherein reflection shield plays the effect of primary event, and the major defect of this light fixture is that dazzle is serious, it is inhomogeneous to shine Luminance Distribution, and light efficiency is lower.

Common in the market light fixture based on the light guide plate characteristic, its structure is mainly by light source, light guide plate and shell are formed, wherein light source is arranged at the light guide plate side usually, shell then is used for fixing light guide plate and light source, during light source luminescent, light is injected light guide plate from the light guide plate side, in light guide plate via the reflection and the refraction, and penetrate from the front, corresponding light guide plate front promptly as the front of light fixture to shine, compare the lighting of transmission, it is even that this light guidance board type illuminating lamp can reach brightness, the radiation response of free from glare.The weak point of this fitting structure is, because light is injected light guide plate by side direction, understanding some light penetrates from opposite side, cause the waste of luminous energy, present common solution to this shortcoming, be that opposite side to light guide plate carries out shutoff, reflect back, make light finally can only penetrate from the front with the light that will arrive this side; Yet in this scheme, light guide plate side and positive at right angles relation, the angle and the effect of light reflection are unsatisfactory, and the light of direct projection also have the part cancel out each other, cause energy loss, finally can cause light decay because of the decay of energy, still there is weak point in therefore visible this scheme.

Summary of the invention

The object of the present invention is to provide a kind of structure more reasonable, can effectively utilize luminous energy, reduce light decay, and effectively increase the light guide plate of light efficiency.

The technical scheme that the present invention is adopted for its technical matters of solution is:

A kind of light guide plate comprises plate-like body, and the main body back side is mainly formed by the slope of the positive face tilt of main body on one day, makes main body both sides thickness differ, and the main body back side is covered with reflector layer.

Further improvement as such scheme, described slope and at least one roughly parallel with main body front burnishing surface are formed, wherein said main body is thicker near a side of curved surface, and described main body is thinner near a side of slope, and described slope roughly is close to a side of described main body.

When the present invention uses, away from a side of slope light source is set at light guide plate main body, the light of light source, inject in the main body by the light guide plate side, behind even light, part light directly penetrates by main body is positive, a part is passed through the main body back side towards righting reflex, and after the one or many reflection, penetrate, the light that this is delivered to slope is also reflected by slope, finally after the one or many reflection, come out by the main body front illuminated, and the angle of slope, can guarantee to inject from side direction that light is more can both usable reflection, so not only significantly reduces or has directly stopped light from penetrate situation near the main body side of slope one side, and can make full use of light by repeatedly reflecting, and then effectively improve luminescence efficiency, through experimental verification, the present invention compares the transmission light fixture, in free from glare, under the light source of equal-wattage, can also effectively improve 20% luminescence efficiency, as seen its advantage; In addition, light guide plate provided by the present invention is compared the light guide plate of transmission, also has this to save the advantage of material and cost.

Description of drawings

Be further detailed below in conjunction with the drawings and specific embodiments:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the cross section structure synoptic diagram of first kind of embodiment of the present invention;

Fig. 3 is the cross section structure synoptic diagram of second kind of embodiment of the present invention;

Fig. 4 is the cross section structure synoptic diagram of the third embodiment of the present invention;

Fig. 5 is the cross section structure synoptic diagram of the 4th kind of embodiment of the present invention.

Embodiment

As Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, a kind of light guide plate provided by the present invention comprises plate-like body 1, and main body 1 adopts materials such as acryl, PC or ABS usually.Among the present invention, main body 1 is one tabular, has certain thickness side 11 as the light inlet side of close light source with incident ray, the 12 bright dipping sides of throwing light in the front of main body 1 as ejaculation light, the back side of main body 1 can be with light towards 12 reflections of the front of main body, wherein, main body 1 back side is made up of a slope 13, makes the thickness of main body 1 both sides differ, for ease of describing, a wherein thicker side is called thicker side 11, thin side is called thin side 16, and this structure in use reflective is by thicker side 11 light inlets, then slope 13 can play light reflection, makes the effect of most of light towards positive 12 directions.In addition as shown in fig. 1, be covered with reflector layer 2, can increase reflector efficiency by reflector layer 2 at main body 1 back side.

In actual use, as preferred implementation, the back side of main body 1 is made up of an at least one burnishing surface 14 and a slope 13, burnishing surface 14 can have certain curvature, but integral body is comparatively level and smooth in view of macroscopic view, and roughly parallel with positive 12, slope 13 is connected with burnishing surface 14, and towards positive 12 inclinations, be an angle with burnishing surface 14, in addition, slope 13 roughly is close to a side of main body 1, make this side part of main body 1 close up, or directly become an acute angle by slope 13; So make main body 1 both sides thickness differ, a wherein thicker side, promptly thicker side 11 is near burnishing surface, and thin side promptly approaches side 16 near slope 13.

As shown in Figure 2, first kind of embodiment provided by the invention, light source 3 can adopt LED lamp pearl usually, be arranged at the thicker side of main body 1, i.e. thicker side 11 shown in the figure, away from slope 13 places, main body 1 back side is by burnishing surface 14, burnishing surface 15 and slope 13 are formed, and slope 13 is between burnishing surface 14 and burnishing surface 15, as the transition face of burnishing surface 14 with burnishing surface 15, so by seeing on the thickness, the main body 1 at burnishing surface 14 places is thicker, forms a thicker side 11 at sidepiece, and with after slope 13 contractions, main body 1 at burnishing surface 15 places is thinner, forms thin side 16 at sidepiece.

Shown in arrow among the figure, the light that light source 2 sends is injected main body 1 via the side 11 of main body 1, and after transmitting in main body 1, wherein a part of light is directly penetrated by the front 12 of main body 1; Another part then is delivered on burnishing surface 14 or the burnishing surface 15, is reflected away towards front 12 by burnishing surface 14 or burnishing surface 15, through primary event or after repeatedly reflecting, finally also penetrates by positive 12; Be delivered to the light of slope 13 after directly injecting in addition by side 11, then because the angle of slope 13, roughly towards positive 12 reflections, therefore finally also through primary event or repeatedly reflection, shine out by positive 12, and through after this irradiation, from the light that penetrates near the thin side 16 of burnishing surface 15, just very few.As can be seen from this embodiment, the light that slope 13 can effectively be injected side 11 reflects away towards front 12, so just can reach the increase light efficiency, reduces light loss, makes full use of the effect of light.

As shown in Figure 3, be second kind of embodiment of the present invention, its basic structure is identical with embodiment in last, institute's difference is, the back side of main body 1 no longer includes burnishing surface 15, after promptly connecting slope 13 by burnishing surface 14, transitted directly to the thin side 16 of main body 1, main body 1 is seen as a square shape in conjunction with right-angled trapezium from the cross section.Shown in arrow among the figure, among this embodiment, the conduction of the light embodiment one that makes peace greatly is identical, and difference is to no longer include burnishing surface 15 and reflects, and under this state, the utilization ratio of light is a basically identical.

As shown in Figure 4, be second kind of embodiment of the present invention, its basic structure is identical with first, second kind embodiment, institute's difference is, the back side of main body 1 no longer includes burnishing surface 15, and behind the burnishing surface 14 connection slopes 13, has been transitted directly to the front 12 of main body 1 by slope 13, promptly saved the thin side 16 of main body 1, main body 1 is seen as a right angle from the cross section trapezoidal.Shown in arrow among the figure, among this embodiment, the conduction of the light embodiment one, two that makes peace greatly is identical, difference is to no longer include burnishing surface 15 and reflects, and light can not conduct to thin side 16 again and reflect, under this state, be more conducive to effectively utilize light, and then reach optimum utilization ratio.

As shown in Figure 5, after adopting structure of the present invention, the light guidance board type light fixture will possess the various deformation mode, for example two light guide plate main bodies 1 are pieced together, make 11 places, side separately of two main bodys 1 that one group of light source 3 respectively is set, unified towards side irradiation, reach a symmetrical irradiating structure.

Certainly in addition, the present invention can also more extend and be out of shape.

From top several embodiment as seen, the present invention compares the transmission light fixture, in free from glare, under the light source of equal-wattage, luminescence efficiency can also effectively be improved, in addition, because the existence of slope 13, the light fixture of same model or light guide plate have been saved the material of part, and therefore the advantage of saving material and cost is also arranged.

Claims

1. a light guide plate comprises plate-like body, it is characterized in that: the described main body back side is mainly formed by the slope of the positive face tilt of main body on one day, makes main body both sides thickness differ, and the main body back side is covered with reflector layer.

2. a kind of light guide plate according to claim 1, it is characterized in that: the described main body back side mainly is made up of slope and burnishing surface at least one and main body front almost parallel, wherein said main body is thicker near a side of curved surface, described main body is thinner near a side of slope, and described slope roughly is close to a side of described main body.