WO2013020422A1

WO2013020422A1 - Lamp box

Info

Publication number: WO2013020422A1
Application number: PCT/CN2012/077559
Authority: WO
Inventors: 王默文
Original assignee: 北京莱易龙光电科技有限公司
Priority date: 2011-08-10
Filing date: 2012-06-26
Publication date: 2013-02-14
Also published as: CN102927457A; CN102927457B

Abstract

A lamp box comprises a lamp box frame and a light source system. The light source system comprises a plurality of reflector modules that are arranged side by side tightly. The reflector module comprises a reflecting plate (101), an upper and a lower side plate (102, 103), a left and a right edge banding (104, 105), and a transparent front cover plate (106). The front cover plate (106) and the reflecting plate (101) are disposed opposite to each other, and form an accommodation space by enclosing with the upper and lower side plates (102, 103) and the left and right edge bandings (104, 105). The reflecting plate has a plurality of light source mounting holes. The lamp box isolates the light source from the external by using the enclosed accommodation space, so as to avoid adsorbed dust from affecting the lightness and uniformity of the lamp box, and enable the whole light of the lamp box to be more uniform.

Description

Light box technical field

The invention relates to the field of light box technology.

Background technique

Existing light boxes, as devices for screen display, often have problems of poor brightness or unevenness, which is related to the structural design of the reflector and, on the other hand, to the dust accumulated in the light box. Due to the static electricity generated by the light source of the light box, a large amount of dust is adsorbed on the surface of the light source, which affects the brightness of the light box, and the dust adsorbed on the surface of the light source is not easily cleaned.

In addition, the existing light box reflector plates are mostly a large integral plate structure, which is very inconvenient in installation operation due to the large volume and weight, especially for the bottom open cover or the side open cover light box structure. When the front cover of the light box cannot be opened, the operation space is narrower. When it is necessary to maintain or replace the light box and the light source structure, the entire reflector plate has to be removed and operated. At the same time, the existing light box also has the problem that the reflective light reflected by the reflector is not uniform, resulting in an unsatisfactory display effect of the light box.

Therefore, there is a need for a new light box structure design to solve the above problems.

Summary of the invention

The technical problem to be solved by the present invention is to provide a light box to overcome the problem of poor or uneven brightness of the existing light box and the inconvenience of installation and maintenance of the reflector.

In order to solve the above problems, the present invention provides a light box, including a light box frame and a light source system, wherein the light source system includes a plurality of closely arranged reflector modules, the reflector module includes a reflector, The upper and lower side plates, the left and right side edges, and the transparent front cover plate; the front cover plate is disposed opposite to the reflection plate, and the upper and lower side plates and the left and right side edges are enclosed to form an accommodation space, and the reflection plate has a plurality of One light source mounting hole.

By applying the invention, the light source is isolated from the outside during use by the sealed accommodating space, thereby avoiding the influence of the adsorbed dust on the brightness and uniformity of the light box; meanwhile, the light source reflector module device provided by the invention can be used Decompose the reflector of the entire light box into multiple modules to assemble, a single module Not only light weight, small size, but also housed in a modular box, even a single person can easily complete the installation or maintenance work, especially for the bottom cover or side open cover light box, does not require a lot of operating space It is convenient to carry out the loading and unloading operation of the module from the opening cover, and the structure of the invention also makes the overall light of the light box more uniform. DRAWINGS

1 is an exploded perspective view of a light box reflector module device according to an embodiment of the invention. Figure 2 is a partial enlarged view of Figure 1.

3 is a partially enlarged schematic view of an edge sealing structure according to an embodiment of the invention.

4 is a partially enlarged schematic view showing the structure of a mounting bar according to an embodiment of the invention. detailed description

The invention will now be further described with reference to the accompanying drawings.

The light box of the present invention comprises a light box frame and a light source system, and the light source system comprises a plurality of closely arranged reflector modules arranged side by side, as shown in FIG. 1 , which is a reflector module according to an embodiment of the invention. The exploded view includes a reflector 101, an upper side panel 102, a lower side panel 103, a left edge seal 104, a right edge seal 105, and a transparent front cover 106. The front cover 106 is disposed opposite to the reflector 101 and passes through The upper and lower side plates 102 and 104 and the left and right side edges 104 and 105 are enclosed to form a sealed receiving space for sealing the light source. The reflecting plate 101 has a plurality of light source mounting holes. The light source can be varied, such as a light bulb, a light tube, or an LED illuminator.

The shape of the reflector may be various. For example, at least one groove may be formed. As shown in FIG. 2, the reflector 101 has two recesses, and the light source mounting hole 1011 may be located in the recess. The bottom of the slot. The mounting person can install the light source on the reflecting plate in the accommodating space through the mounting hole 1011, and the required circuit components such as wires or circuit boards can be installed behind the reflecting plate through the mounting holes. The reflector can be connected to the upper and lower side plates by screws with an outer flange 1012 formed in the middle of the bottom edge. Of course, the reflector plate does not necessarily have to be connected to the upper and lower side panels by the outer flange design. In fact, if the left and right edge seals are integrally formed with the reflector, the connection of the left and right edge seals to the upper and lower side panels can be The function of connecting the reflectors is enclosed, and the connection of the flared edges 1012 further serves to strengthen the joint strength. The main function of the left and right edge seals is to fix the front cover while sealing on the side. The shape of the edge seal may be a flat shape or an angle steel shape (forming an inner flange shape), etc., and is particularly possible, in order to fasten the front cover, generally forming an inner flange to press the front cover. However, regardless of the shape, since the edge band has a certain thickness and width, when it is located on the light path, it will cause some occlusion of the light source light to form a weak light region; and since the edge band is located at the edge of the module device, When the light boxes are combined and used side by side, the weak light region is not filled with light and the range is increased, so that dark areas or black roads are easily formed at the edge sealing position.

According to an embodiment of the present invention, a portion of the left and right edges that are higher than the left and right sides of the reflector may be formed of a transparent material. Of course, the left and right edges may be entirely made of a transparent material, which obviously belongs to the protection scope of the present invention. . Since the transparent material causes less loss of light, the formation of dark areas can be avoided. The portion where the left and right edges are higher than the left and right sides of the reflector may be integrally formed with the front cover or fixed separately, which is not limited in the present invention.

According to another embodiment of the present invention, the front cover can be fixed by the engagement of the inner flange of the upper and lower edges of the left and right edges with the front cover. The front cover can be fixed to the upper or lower side of the inner flange by bonding; or the front cover can be fastened under the inner flange by pressing, so that the front cover is fixed. There are a plurality of hollow portions on the inner flange, and the design of the hollow portion allows more light to pass through and also reduces occlusion of light.

The shape of the hollow portion may be various, such as an elliptical shape, a square shape, or the like, or a shape such as a sawtooth wave or a square wave-shaped notch, as long as it can block light as much as possible while fixing the front cover.

After the inner flange is hollowed out, the texture is easy to soften, and the supporting force on the front cover may be insufficient. In this case, according to an embodiment of the present invention, a vertical edge may be further formed on the outer edge of the inner flange, such as As shown in Fig. 3, the vertical edge 10511 enhances the strength of the entire inturned edge 1051, thereby also enhancing the strength of the right edge 105.

It can also be seen in Figure 3 that the right edge 105 and the upper and lower side plates can be inserted and closed by the plug portion 1052. The plug-in structure is not only strong but also plays a role in position correction.

In addition, the device of the present invention may further include at least one light source mounting strip 106. As shown in FIG. 1 and FIG. 2, the mounting strip is disposed behind the reflective plate and connected to the upper and lower side plates, and has a mounting strip thereon. a plurality of light source mounting portions 1061 are located opposite to the light source mounting holes 1011 on the reflector Should. In order to strengthen the strength of the mounting strip, a support member 107 may be added under the mounting strip 106 and fixed to the sealing edge to support the mounting strip from the middle portion to prevent the mounting strip from collapsing and also the strength of the entire reflecting plate. Played an enhanced role.

In the embodiment shown in FIG. 4, the mounting strip 106 may be a groove type, and the groove edge 1062 is in contact with the reflecting plate. The plurality of light source mounting pieces 1061 are disposed in the notch, and the light source mounting portion is located on the mounting piece. The bottom of the notch can also accommodate the light source circuit wires and the like drawn from the mounting piece, and the wires are arranged in the closed space in the slot, which is very safe and convenient.

Through the installation bar, the light source can be installed and fixed in advance and then installed in the module device as a whole, just as convenient as installing a lamp tube, thereby improving the efficiency of on-site assembly; Moreover, the mounting bar supports the reflector plate below, and strengthens The stability of the overall structure; on the other hand, since the light source mounting strip carries and fixes the light source, the structural design of the mounting portion in the reflector is simplified.

The transparent material according to the embodiment of the present invention refers to a material that can transmit light, such as a glass, a PC board, a light transmissive board, a soft light board, a frosted glass, or the like, or a transparent or translucent material.

If you use a fully transparent front cover, you can use the semi-transparent front cover (such as a soft plate, milk whiteboard, etc.) to make the light from the light source as much as possible. The front cover reflects part of the light back to the reflector and then reflects it twice. In this way, the light emitted by the light source is uniformly processed by the translucent front cover and then illuminated to the display direction, so that the translucent front cover is transmitted. The light of the board is softer overall.

For example, when the background color of the display screen set on the light box is white or light color, the light emitted by the light source is partially reflected back to the side of the reflecting plate through the white film or the light color film of the display screen, and then formed. The secondary reflection illuminates the screen, and the round-trip multiple reflection, by the diffraction effect of the light, can uniformly soften the light emitted by the light source; however, when the background of the display set on the light box is black or deep In the color system, the black film or dark film of the display will absorb the light from the light source, and will not reflect the light back to the side of the reflector, which reduces the chance of secondary reflection and reduces the chance of secondary reflection. The crochet effect achieved by the secondary reflection will produce a bright strip on the display, which affects the display effect of the light box. The light strip can only be weakened by increasing the thickness of the light box and extending the optical path, but this will undoubtedly increase. Manufacturing costs and affecting aesthetics. In this case, if the front cover is set as a translucent front cover, the translucent front cover will pass. The secondary reflection formed by the light source is first softened inside the box, which is equivalent to forming a light box that emits uniform light. When the light emitted by the light box reaches the black film or dark film of the display image. It is already the light after the smoothing process, which avoids the generation of bright strips on the display screen, which can greatly reduce the thickness of the light box, and the overall brightness is increased due to the shortening of the optical path, or the brightness is constant. This can reduce power consumption.

The invention adopts a box structure formed by a sealed accommodating space, so that the light source is isolated from the outside during use, and the surface of the light source is directly prevented from directly adsorbing external dust, even if it is electrostatically generated by the light source, and adsorbed outside the transparent front cover after long-term use. It is dusty and it is easy to clean the dust outside the flat transparent front cover.

Moreover, the present invention can be composed of a combination of a plurality of reflector modules to form an integral reflector plate of the light box, so that a single reflector module can be loaded or unloaded by one person, and the whole is convenient. Installation or commissioning of the light box reflection system. This is even more obvious for subway light boxes. For safety reasons, the light box used for the subway is not allowed to open the front cover. The light box reflector can only be installed and maintained by the bottom cover. In the prior art, if one of the light source sources is damaged, the maintenance personnel need to have the entire reflector removed for maintenance due to the narrow operating space of the bottom cover light box. With the present invention, the module in which the damaged light source is located can be taken out.

According to an embodiment of the present invention, the groove structure of the reflecting plate 101 may be a sawtooth wave or a forward triangular wave type having a space, or may be a trapezoidal waveform. The groove structure of the trapezoidal waveform is not only a flat bottom, but also a light source can be conveniently installed. Moreover, the adjacent groove sides of the adjacent grooves have a certain distance and form a plane. If the adjacent IHJ slots are closely connected, the angle formed by the sides of the adjacent slots is likely to form a bright line at the relative position of the display screen, which affects the display effect of the screen; and the two sides of the adjacent two grooves are spaced apart. A distance, forming a plane, because the plane does not cause the light emitted by the light source to form a convergence, avoiding the appearance of bright lines. At the same time, the formed plane also increases the strength of the reflector. When it is in contact with the transparent front cover, it can better fit the transparent front cover and improve the tightness of the whole box.

The angle between the bottom edge and the two sides of the trapezoidal wave is preferably greater than or equal to the illumination angle of the light source, that is, the side of the trapezoidal wave is outside the effective illumination angle of the light source, and the illumination angle of the light source is the light scattering angle of the light source, for example, when When the illumination angle of the light source is 40 degrees - 120 degrees, if the angle between the bottom side and the side is less than 120 degrees, the direct light of the light source is blocked. Therefore, preferably, the bottom side and the sides of the trapezoidal wave The angle between the sides should be no less than 120 degrees. Thus, since the light box is a secondary reflection device, the trapezoidal wave side of the reflector not only does not block the direct light of the light source, but also reflects the light reflected from the direction of the picture display panel back to the screen display direction.

Along the bottom edge of the trapezoidal wave to the top edge direction, the distance between the side of the trapezoidal wave and the display direction of the screen is gradually shortened, and just the light reflected back from the screen display direction is gradually weakened from the bottom of the trapezoidal wave to the two sides. In this way, we can see that the portion of the side that is closest to the display direction of the picture is also the weakest part of the light reflected back from the direction of the picture display, so that the weakest light can be reflected back to the display direction of the picture with the shortest optical path. Thus, along the side, and so on, the gradual strong light can be reflected back to the display direction by the progressive optical path, achieving uniformity of the overall light.

The height of the module device is preferably matched with the height of the light box. Of course, the height can be set according to the actual situation. For example, if the height is smaller than the height of the light box, it can be installed in the light box. .

Further, the side surface of the groove of the reflector may have a plurality of ribs to increase the light-emitting effect on the secondary reflected light, and the ribs may be parallel to the edge of the groove and stepped. Distributed on the side of the groove. The step shape of the reflecting plate can be extended according to the size of the reflecting plate and the number of the light source points provided, wherein the stepped reflecting plate has a stepped plane, and the light reflected back from the transparent front cover is retroreflected with the shortest optical path. To the transparent front cover, if the stepped portion is not formed as a convex surface but is still a beveled edge of the groove, then the light will be obliquely reflected back toward the transparent front cover with a large optical path, and it is because of the formation The step plane can make the angle of the retroreflected light as positive as possible to the transparent front cover; at the same time, the farther away from the light source, the weaker the light intensity, and the steeper the light intensity due to the slope of the trough, the ladder The convex plane can receive light earlier and return light with a shorter optical path, thus further creating a hooking effect.

The stepped convex plane is only for controlling the area or height of the light receiving surface, and the area and height of the light receiving surface may be different depending on the actual situation, and the stepped shape is only a preferred embodiment.

Claims

Claim

A light box comprising a light box frame and a light source system, wherein the light source system comprises a plurality of closely arranged reflector modules arranged side by side, the reflector module comprising a reflector, upper and lower side plates, and left and right edge seals And a transparent front cover; the front cover is disposed opposite to the reflector, and the upper and lower sides and the left and right edges are enclosed to form a receiving space, and the reflector has a plurality of light source mounting holes.

2. The light box according to claim 1, wherein the reflecting plate forms at least one groove, and the light source mounting hole is disposed at a bottom of the groove.

The light box according to claim 1, wherein the portion where the left and right edges are higher than the left and right sides of the reflector is formed of a transparent material.

4. The light box according to claim 3, wherein the portion of the left and right edges that are higher than the left and right sides of the reflector is integrally formed with the front cover.

The light box according to claim 1, wherein the sealing edge is integrally formed with the reflecting plate.

6. The light box of claim 1 wherein said edge seal has a plurality of hollow portions.

7. The light box of claim 1 wherein said edge has an inner flange that engages the front cover and said inner flange has a plurality of hollows.

8. The light box of claim 7, wherein the front cover is bonded or crimped to the inner flange.

9. The light box of claim 7, wherein the outer edge of the inner flange further defines a vertical edge.

The light box according to claim 1, wherein the left and right edge seals are inserted and enclosed with the upper and lower side plates.

The light box according to claim 1 or 2, further comprising at least one light source mounting strip, the mounting strip being disposed behind the reflecting plate and connected to the upper and lower side plates, and having a plurality of mounting strips The light source mounting portions are located corresponding to the light source mounting holes on the reflector.

The light box according to claim 11, wherein the mounting strip is of a slot type, the slot edge is in contact with the reflector, the slot has a plurality of light source mounting pieces, and the light source mounting portion is installed Chip.

13. The light box of claim 2, wherein the side of the groove has a plurality of convexities Edge.

14. The light box of claim 13, wherein the plurality of ribs are parallel to the groove notch edge and are arranged in a stepped manner on a side of the groove.

The light box according to claim 2, wherein the reflecting plate has a trapezoidal waveform in cross section.

The light box according to claim 15, wherein an angle between a bottom side and a side of the trapezoidal wave is not less than an angle of illumination of the light source.

17. The light box of claim 1, wherein the transparent front cover is a soft light panel.

18. The lightbox of claim 11 further comprising at least one support member located below said mounting strip and secured to the edge seal to support the mounting strip.