CN201877088U

CN201877088U - LED (Light-emitting Diode) lamp box

Info

Publication number: CN201877088U
Application number: CN2010202677413U
Authority: CN
Inventors: 王默文
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-19
Filing date: 2010-07-19
Publication date: 2011-06-22
Anticipated expiration: 2020-07-19

Abstract

The utility model relates to an LED (Light-emitting Diode) lamp box which comprises a picture supporting board and a light source system, wherein the light source system comprises a back board, a plurality of LED groups are arranged on at least one side surface of the back board, each LED group comprises at least one LED, the light-emitting direction of the LED faces to the picture showing direction, a plurality of light-reflection devices which are distributed on the side direction of the LED groups are also arranged on the side surface of the back board, are positioned between the side surface of the back board and a shown picture, and are used for reflecting the light reflected from the picture showing direction to the picture showing direction again, each light-reflection device is provided with a top surface, and the top surface is provided with at least one LED, and the light brightness of the LED on the top surface of the light-reflection device is lower than the brightness of the LED on the side surface of the back board. In the utility model, the light-reflection devices strengthen the brightness of the whole lamp box, and supplement light to a dark area, so that the light is more uniform; the distance between the LEDs on the side surface of the back board and the light-reflection devices is increased, and the LEDs are arranged on the top surfaces of the light-reflection devices, so that the light in the dark area formed by an area taking the light-reflection devices as the center can be supplemented; and the number of the LEDs can be reduced, and the energy consumption can be reduced.

Description

A kind of LED lamp box

Technical field

The utility model relates to the lamphouse light source field, relates in particular to a kind of LED lamp box.

Background technology

Existing LED lamp box as the equipment of picture exhibition, as shown in Figure 1, will comprise backboard 12 haply at least, and shows picture 20.Wherein, backboard 12 is as the supporting body of led light source 14.Owing to show the existence of picture, the light that LED sends can not come out by direct irradiation, but transmit after need seeing through the displaying picture 20 of front or other restraining masss or stilt, therefore, the light that led light source 14 sends, have only a small part directly to transmit, as light 141, after most of light (as light 142) will be demonstrated picture 20 and reflects through shining to the picture exhibition direction once more behind the secondary reflection of backboard, equally, the light of this secondary reflection still has only the direct transmission of a small part light to go out, most of light is reflected once more, as light 143, like this, the light that LED sends will show that showing the light of going out through formation transmission after repeatedly reflecting between picture and the backboard picture is presented in face of the people.

Yet along with the repeatedly reflection and the prolongation of light path of light, the loss of illumination energy is also increasing, the illumination brightness that this can great influence finally can transmission goes out.

On the other hand, the light-source system of existing LED lamp box comprises backboard 12 as shown in Figure 2, and backboard 12 is provided with plurality of LEDs 14, or a plurality of LED group, and each LED group has a LEDs at least.

As shown in Figure 3, no matter be the LED group that single LEDs or a plurality of LED form, each LED (group) 14 is luminous with the similarity form of light source, the light that sends shines towards the picture exhibition direction, effective range of exposures of each pointolite 14 roughly forms the circle 16 of an expansion, as seen from Figure 3, gap between the adjacent pointolite, during particularly with array format, the illumination of the vicinity, center 18 of the rectangle that per 4 consecutive point light sources form is the most not enough, and this is reflected on the displaying picture will form a plurality of dark spaces.

Should be noted that the part that is similar to gap 18, is not have illumination to exist, but a little less than the illumination, the ability that its displaying picture that penetrates the front arrives the lamp box outside is more weak, and this visually will form the dark space of showing on the picture.If the dark space exists too much, not only influence overall brightness, and the contrast in dark space and clear zone can cause the inhomogeneous of picture exhibition, influence visual effect.

Therefore, for existing lamp box, when illumination brightness is not enough, then need to increase the power of LED, make LED send brighter light, but the light that LED sends is bright more, not only power consumption more, and the contrast in easy more formation dark space and clear zone, promptly effective range of exposures 16 of LED is bright more, it is dark more that dark space 18 seems, this has formed a pair of insoluble contradiction.Even increase the distribution density of LED, can cause new clear zone and dark space equally, can't solve above-mentioned contradiction in essence.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of LED lamp box, to overcome the existing contradiction of LED lamp box between overall brightness, energy consumption and uniformity coefficient.

For solving the problems of the technologies described above, the utility model provides a kind of LED lamp box, comprise picture back up pad and light-source system, described light-source system comprises backboard, at least one side of described backboard is provided with a plurality of LED groups, each LED group comprises at least one LED and circuit thereof, the light emission direction of this LED is to shine to the picture exhibition direction, described backboard further has a plurality of reflex reflectors on the side, be distributed on the lateral of described LED group, in described backboard side and show between the picture, the light that will reflect from described picture exhibition direction is reflected back picture exhibition direction once more; Described reflex reflector has an end face, further is provided with at least one LED and circuit thereof on the described end face, and the luminosity of the LED on the described end face is lower than the luminosity of the LED on the described backboard side.

Compared with prior art, the utility model has not only strengthened the overall brightness of lamp box by the setting of reflex reflector, has reduced power consumption, and simultaneously light filling has been carried out in the dark space, makes overall light more even; The utility model reduces the use amount of LED because the existence of reflex reflector can be increased to the spacing between the LED a suitable distance, cuts down the consumption of energy.But when the spacing between the LED further increases, because the light minimizing that reflex reflector " is borrowed " from LED on every side as virtual luminophor, therefore may form the dark space once more in the zone that with the reflex reflector is the center, and the utility model can address this problem effectively by the mode that LED is set further on the reflex reflector end face.

Description of drawings

Fig. 1 is the side view of existing LED lamp box.

Fig. 2 is the front elevation of existing LED lamp box.

Fig. 3 is the local luminous synoptic diagram of existing LED lamp box.

Fig. 4 is the side view according to the described LED lamp box of the utility model embodiment.

Fig. 5 is the front elevation according to the described LED lamp box of the utility model embodiment.

Fig. 6 is the partial schematic diagram according to the described LED lamp box of the utility model embodiment.

Fig. 7 is the cut-open view according to the described LED lamp box of the utility model embodiment.

Embodiment

With reference to the accompanying drawings the utility model is described further.

As shown in Figure 4, be side view according to the described LED lamp box of the utility model embodiment, comprise light-source system 40 and have the picture back up pad 20 of showing picture, described light-source system 40 comprises the backboard 42 with picture back up pad 20 almost parallels, at least one side of described backboard 42 is provided with a plurality of LED groups 44, each LED group 44 comprises at least one LED and circuit thereof, the light emission direction of this LED is to shine to the picture exhibition direction, further comprise a plurality of reflex reflectors 46 on the described backboard side, be distributed on the lateral of described LED group 14, in described backboard side and show between the picture, the light that will reflect from described picture exhibition direction is reflected back picture exhibition direction once more.Described reflex reflector has an end face, further is provided with at least one LED and circuit thereof on the described end face, and the luminosity of the LED on the described end face is lower than the luminosity of the LED on the described backboard side.In Fig. 4, the LED on the end face is meant t.(not shown led circuit among Fig. 4), the connection of LED or control circuit can connect or be arranged on the backboard or the backboard back side etc., and the utility model does not limit; It is inner and be arranged on the backboard or the backboard back side etc. that led circuit on the reflex reflector end face can pass reflex reflector.

The displaying picture that the light 441 that LED sends sees through on the picture back up pad 20 outwards sends, because the setting of reflex reflector, the light that reflects from the picture exhibition direction, needn't be after arriving backboard secondary reflection again, but the secondary reflection via the surface of reflex reflector more early is to the picture exhibition direction, for example light 442, and the length that this has reduced light path makes light secondary reflection more early to the picture exhibition direction.So, light is through after repeatedly reflecting, and for example light 443, can reduce the loss of illumination energy greatly.

Simultaneously, because reflex reflector is distributed on the lateral of LED group 14, the forward that can not stop LED is luminous, can also be by receiving the lateral light that LED sends, and receive the light that reflects from the picture exhibition direction, thus a virtual luminophor formed in the more weak dark space of intensity of illumination, under the situation that strengthens the whole illumination of lamp box, remedy the illumination of dark space simultaneously, realized the even of whole illumination.In the utility model,, reduce the use amount of LED, cut down the consumption of energy because the existence of reflex reflector can be increased to the spacing between the LED a suitable distance.But when the spacing between the LED further increases, because the light minimizing that reflex reflector " is borrowed " from LED on every side as virtual luminophor, therefore may form the dark space once more in the zone that with the reflex reflector is the center, and the utility model can address this problem effectively by the mode that LED is set further on the reflex reflector end face.Wherein, can pass through to select the power of the power of LED on the end face less than the LED on the described backboard side, so that the luminosity of the LED on the end face is lower than the luminosity of the LED on the described backboard side, perhaps also can make the luminosity of the LED on the end face be lower than the luminosity of the LED on the described backboard side, can make the whole illumination of LED lamp box more even like this by modes such as circuit controls.

Reflex reflector can be an independent device, is arranged on the described backboard side; Can be the some projectioies towards the picture exhibition direction that are integrally formed on the described backboard side, the utility model limit this yet.

As shown in Figure 5, for the front elevation according to the LED lamp box shown in the utility model embodiment, for easy for installation, a plurality of reflex reflectors 46 can be connected to each other forms an integral inverted electro-optical device grid or an array, during installation, disposablely grid or array are installed on backboard 42 fronts get final product.

Preferably, described a plurality of reflex reflectors are distributed on the center line of line of adjacent LED group, so that light filling is carried out in the dark space.

Be more preferably, as shown in Figure 5, when a plurality of LED groups 44 are arrayed, has a reflex reflector 46 near the center of the rectangle that every four adjacent LED groups form, so that light filling is carried out in this dark place, t is LED on the end face of reflex reflector 46 among Fig. 5, can be to being that the zone at center forms the dark space and carries out light filling with the reflex reflector.

According to principle of the present utility model, as long as described reflex reflector is on the whole can be reflective, and concrete shape can design according to the specification of LED group.Preferably, the shape of reflex reflector to display screen orientation, is shape from the coarse to fine from the backboard side, for example, as shown in Figure 4, can be at least a portion of spheroid or cone, and the side that so can make full use of reflex reflector is also accepted and reflection ray.Described cone can be circular cone, pyramid or curved surface cone etc., and the utility model does not limit this.

Be more preferably, as shown in Figure 6, described reflex reflector can be tetragonous cone table shape, and four sides are organized towards four LED of periphery respectively.T is LED on the end face of reflex reflector among Fig. 6.

Preferably, as shown in Figure 7, described reflex reflector 46 so can be avoided effective direct projection light of LED to be advisable outside the effective lighting angle 72 that is positioned at described LED group 44 as far as possible.Generally speaking, effective lighting angle of LED roughly about each 45 the degree between, the light illumination outside this angle a little less than, can come reinforcement by reflex reflector is set.T is LED on the end face of reflex reflector among Fig. 7.

Preferably, described reflex reflector has can be substantially positive a reception from showing the plane or the curved surface of the light that picture reflects, and the shape of this plane or curved surface and position and show the near as far as possible and area of the distance of picture big as far as possible between compromise.Distance shows that picture is near more, and then the light path of reflection ray is short more, and area is big more, then directly secondary reflection to return the light of displaying picture many more.

Preferably, the outside surface of described reflex reflector is a white.The reflecting effect that white is reached is relatively good.

Preferably, the outside surface of described reflex reflector is that diffuse-reflective material forms.Diffuse reflection forms uniform light effects.

In addition, in order further to improve the luminescence efficiency of LED group, described backboard can also have a plurality of recessed spatial accommodations, and described a plurality of LED groups are positioned at described a plurality of recessed spatial accommodation respectively, and at least a portion of the inside surface of described spatial accommodation is a reflective surface.By recessed reflective surface, the lateral light of LED can be collected preferably and reflected; Another technical scheme is to set up at least one lens for described each LED group, covers at described LED top, can improve the luminescence efficiency of LED equally.But the enforcement of this type of scheme owing to make that the LED group is luminous brighter, therefore more need cooperate the above-mentioned measure that reflex reflector is set in the dark space, otherwise the light and shade contrast can be more obvious.

In order to make light more even, embodiment of the present utility model further provides a white light-passing board, substantially parallel with the displaying picture, be arranged between described displaying picture and the reflex reflector, make and the at first described white light-passing board of transmission of light that light source of the present utility model sends shine and show on the picture more uniformly.In like manner, apply one deck white photic zone at the back of showing picture, also can realize similar effects.

The above; it only is the preferable embodiment of the utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the utility model; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.

Claims

1. LED lamp box, comprise picture back up pad and light-source system, described light-source system comprises backboard, at least one side of described backboard is provided with a plurality of LED groups, each LED group comprises at least one LED and circuit thereof, the light emission direction of this LED is to shine to the picture exhibition direction, it is characterized in that, described backboard further has a plurality of reflex reflectors on the side, be distributed on the lateral of described LED group, in described backboard side and show between the picture, the light that will reflect from described picture exhibition direction is reflected back picture exhibition direction once more; Described reflex reflector has an end face, further is provided with at least one LED and circuit thereof on the described end face.

2. LED lamp box as claimed in claim 1 is characterized in that, the power of the LED on the described end face is less than the power of the LED on the described backboard side.

3. LED lamp box as claimed in claim 1 is characterized in that, described reflex reflector is the some projectioies towards the picture exhibition direction that are formed on the described backboard side.

4. LED lamp box as claimed in claim 1 is characterized in that, described a plurality of reflex reflectors are connected to each other and form an integral inverted electro-optical device grid or an array.

5. LED lamp box as claimed in claim 1 is characterized in that, described a plurality of reflex reflectors are distributed on the center line of line of adjacent LED group.

6. LED lamp box as claimed in claim 1 is characterized in that, described a plurality of LED groups are arrayed, has a reflex reflector near the center of the rectangle that every four adjacent LED groups form.

7. LED lamp box as claimed in claim 1 is characterized in that, the shape of described reflex reflector to display screen orientation, is shape from the coarse to fine from the backboard side.

8. LED lamp box as claimed in claim 7 is characterized in that, described reflex reflector is at least a portion that is spheroid or cone.

9. LED lamp box as claimed in claim 7 is characterized in that described reflex reflector is tetragonous cone table shape, and four sides are organized towards four LED of periphery respectively.

10. LED lamp box as claimed in claim 1 is characterized in that, described reflex reflector is positioned at outside effective lighting angle of described LED group.

11. LED lamp box as claimed in claim 10, it is characterized in that, described reflex reflector has basic positive a reception from showing the plane or the curved surface of the light that picture reflects, and the shape of this plane or curved surface and position and show the near as far as possible and area of the distance of picture big as far as possible between compromise.

12. LED lamp box as claimed in claim 1 is characterized in that, the outside surface of described reflex reflector is a white.

13. LED lamp box as claimed in claim 1 is characterized in that, the outside surface of described reflex reflector is that diffuse-reflective material forms.

14. LED lamp box as claimed in claim 1 is characterized in that, described backboard has a plurality of recessed spatial accommodations, and described a plurality of LED groups are positioned at described a plurality of recessed spatial accommodation respectively, and at least a portion of the inside surface of described spatial accommodation is a reflective surface.

15. LED lamp box as claimed in claim 1 is characterized in that, described each LED group further comprises at least one lens, covers at described LED top.

16. LED lamp box as claimed in claim 1 is characterized in that, described LED lamp box further comprises a white light-passing board, and is substantially parallel with the displaying picture, and between described displaying picture and reflex reflector.

17. LED lamp box as claimed in claim 1 is characterized in that, described LED lamp box further comprises a white photic zone, is formed to show the picture back.