CN210129083U

CN210129083U - Light-emitting module for backlight illumination

Info

Publication number: CN210129083U
Application number: CN201920901091.4U
Authority: CN
Inventors: 黄宏臻
Original assignee: GOOD VISION PRECISION INSTRUMENT Co Ltd
Current assignee: GOOD VISION PRECISION INSTRUMENT Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2020-03-06
Anticipated expiration: 2029-06-14

Abstract

The utility model provides a light-emitting module for backlight illumination, which comprises a shell, wherein the top of the shell is provided with a surface light source and a light-emitting frame side by side, and a glass cover plate is arranged in the light-emitting frame; still be equipped with first speculum and second mirror in the shell, the plane of reflection of first speculum is towards surface light source and second mirror, and the plane of reflection of second mirror is towards glass apron and first speculum, and the light emitting area of surface light source is towards first speculum, and first speculum, second mirror all become 45 degrees contained angles with the light emitting area of surface light source. The utility model discloses set up confined space of adjusting luminance, the light that can make the area source send obtains twice reflection, lengthens the light path in limited space, converts the light that diffuses into the parallel light, can effectively detach partial veiling glare, improves illuminating effect for imaging system can ensure that the profile of image is more clear, the border is sharper, can effectively improve imaging system's formation of image effect.

Description

Light-emitting module for backlight illumination

Technical Field

The utility model relates to a light-emitting module specifically discloses a light-emitting module for backlight.

Background

The light emitting module is a product for packaging a light source as required. The light emitting module is required to be used in the fields of illumination, display and the like, and the LED module is one of the light emitting modules.

In an automatic visual inspection device, a CCD module is mostly used for acquiring and analyzing image information of a detected product, and the CCD module is required to be provided with an illumination structure for acquiring the image information, so that the CCD module can be ensured to acquire accurate image information. In the prior art, the backlight source equipped for the CCD module is a simple surface light source structure, and the provided light has more stray light, and the imaging effect obtained by the CCD module is not clear enough.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for a light emitting module for backlight illumination, which has less stray light and can ensure clear image profile when used in an imaging system.

In order to solve the prior art problem, the utility model discloses a light-emitting module for backlight illumination, which comprises a shell, wherein the top of the shell is provided with a surface light source and a light-emitting frame side by side, and a glass cover plate is arranged in the light-emitting frame; still be equipped with first speculum and second mirror in the shell, the plane of reflection of first speculum is towards surface light source and second mirror, and the plane of reflection of second mirror is towards glass apron and first speculum, and the light emitting area of surface light source is towards first speculum, and first speculum, second mirror all become 45 degrees contained angles with the light emitting area of surface light source.

Furthermore, the shell comprises a bottom plate, two opposite oblique side plates and two opposite vertical side plates are fixed on the bottom plate, and the two oblique side plates are respectively attached to the first reflecting mirror and the second reflecting mirror in parallel.

Furthermore, two sides of each vertical side plate are respectively provided with a clamping groove, and the edge of the first reflector and the edge of the second reflector are respectively positioned in each clamping groove.

Furthermore, the bottom of the light-emitting frame is provided with a limiting installation groove, and the glass cover plate is positioned in the limiting installation groove.

Furthermore, still be fixed with the riser that is in the light in the shell, the riser that is in the light is located the junction of area source and light-emitting frame.

Furthermore, the height of the shell is H, the height of the light-blocking vertical plate is H, and H is more than or equal to 0.15H and less than or equal to 0.3H.

The utility model has the advantages that: the utility model discloses a light-emitting module for backlight sets up the confined space of adjusting luminance, and the light that can make the area source send obtains twice reflection, lengthens the light path in limited space, converts the light that diffuses into the parallel light, can effectively detach partial miscellaneous light, improves illuminating effect for imaging system can ensure that the profile of image is more clear, the border is sharper, can effectively improve imaging system's imaging effect.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic view of the split structure of the present invention.

Fig. 3 is a schematic top view of the present invention.

Fig. 4 is a schematic cross-sectional view taken along a-a' in fig. 3 according to the present invention.

The reference signs are: the light-emitting device comprises a shell 10, a bottom plate 11, an inclined side plate 12, a vertical side plate 13, a clamping groove 131, a surface light source 20, a light-emitting frame 30, a glass cover plate 31, a limiting installation groove 301, a first reflecting mirror 41, a second reflecting mirror 42 and a light-blocking vertical plate 50.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 to 4.

The embodiment of the utility model discloses a light-emitting module for backlight, including shell 10, shell 10 is non-transparent aluminum hull structure, can effectively improve holistic radiating effect, and the open-top of shell 10 is equipped with area source 20 and light-emitting frame 30 side by side, and preferably, area source 20 is the LED panel light, is equipped with glass apron 31 in the light-emitting frame 30, and light-emitting frame 30 is non-transparent aluminum frame structure, can effectively control the shape that forms the facula; the housing 10 is further provided with a first reflecting mirror 41 and a second reflecting mirror 42, the reflecting surface of the first reflecting mirror 41 faces the surface light source 20 and the second reflecting mirror 42, the reflecting surface of the second reflecting mirror 42 faces the glass cover plate 31 and the first reflecting mirror 41, the light emitting surface of the surface light source 20 faces the first reflecting mirror 41, the first reflecting mirror 41 and the second reflecting mirror 42 form an included angle of 45 degrees with the light emitting surface of the surface light source 20, and the mirror surfaces of the first reflecting mirror 41 and the second reflecting mirror 42 are perpendicular.

The light emitted from the surface light source 20 is incident on the first reflector 41 and then reflected, the reflected light from the first reflector 41 is incident on the second reflector 42 and then reflected again, the reflected light from the second reflector 42 is incident on the glass cover plate 31 and the light-emitting frame 30, and the light-emitting frame 30 effectively limits the shape of the emergent light spot, thereby forming a light distribution effect with a clear light spot boundary. The limited space is formed inside the housing 10, and the light rays are reflected twice by the first reflecting mirror 41 and the second reflecting mirror 42, so that the light path is effectively lengthened, the diffused light is converted into parallel light, meanwhile, some stray light can be effectively removed, the final lighting effect is improved, the outline of the irradiated object is clearer, and the boundary is sharper.

The utility model discloses set up confined space of adjusting luminance, the light that can make the area source 20 send obtains twice reflection, lengthens the light path in limited space, converts the light that diffuses into the parallel light, can effectively detach partial veiling glare, improves illuminating effect for imaging system can ensure that the profile of image is more clear, the border is sharper, can effectively improve imaging system's formation of image effect.

In this embodiment, the housing 10 includes a bottom plate 11, two opposite oblique side plates 12 and two opposite vertical side plates 13 are fixed on the bottom plate 11, the vertical side plates 13 are isosceles trapezoids, the vertical side plates 13 and the bottom plate 11 are rectangular plates, the two oblique side plates 12 are respectively closely attached to the first reflector 41 and the second reflector 42 in parallel, and the two oblique side plates 12 are respectively attached to the bottom plate 11.

Based on the above embodiment, two sides of each vertical side plate 13 are provided with a clamping groove 131, the edge of the first reflector 41 and the edge of the second reflector 42 are respectively located in each clamping groove 131, the first reflector 41 and the second reflector 42 are clamped and positioned by the clamping grooves 131, no drilling is needed for the first reflector 41 and the second reflector 42, and the structural stability of the first reflector 41 and the second reflector 42 can be effectively ensured.

In this embodiment, the bottom of light-emitting frame 30 is equipped with spacing mounting groove 301, and glass apron 31 is arranged in spacing mounting groove 301, and spacing mounting groove 301 lets for glass apron 31, can effectively restrict the position of glass apron 31, improves the convenient degree of installation.

In this embodiment, still be fixed with the riser 50 that is in the light in the shell 10, the riser 50 that is in the light is located the junction of area source 20 and light-emitting frame 30, and the riser 50 that is in the light can effectively avoid taking place the crosstalk, ensures that the light that area source 20 sent can not directly reach the second mirror 42, can effectively ensure the light path and meet the requirements to ensure the illuminating effect of light-emitting module.

Based on the above embodiment, the height of the housing 10 is H, the height of the light-blocking riser 50 is H, H is greater than or equal to 0.15H and less than or equal to 0.3H, preferably, H is 0.2H, and the light-blocking riser 50 has a reasonable height, so that light crosstalk can be effectively avoided, and meanwhile, the utilization rate of light energy can be effectively ensured.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The light-emitting module for backlight illumination is characterized by comprising a shell (10), wherein a surface light source (20) and a light-emitting frame (30) are arranged on the top of the shell (10) side by side, and a glass cover plate (31) is arranged in the light-emitting frame (30); still be equipped with first speculum (41) and second mirror (42) in shell (10), the plane of reflection of first speculum (41) orientation surface light source (20) with second mirror (42), the plane of reflection of second mirror (42) orientation glass apron (31) with first speculum (41), the light emitting surface orientation of surface light source (20) first speculum (41), first speculum (41) second mirror (42) all with the light emitting surface of surface light source (20) becomes 45 degrees contained angles.

2. A light module as claimed in claim 1, wherein said housing (10) comprises a bottom plate (11), two opposite oblique side plates (12) and two opposite vertical side plates (13) are fixed on said bottom plate (11), and said two oblique side plates (12) are respectively attached to said first reflector (41) and said second reflector (42) in parallel.

3. A lighting module for back-lighting according to claim 2, wherein each of said vertical side plates (13) is provided with a locking groove (131) at both sides, and the edge of said first reflector (41) and the edge of said second reflector (42) are respectively located in each of said locking grooves (131).

4. The lighting module for back light according to claim 1, wherein the bottom of the light-emitting frame (30) is provided with a limit installation groove (301), and the glass cover plate (31) is located in the limit installation groove (301).

5. The lighting module for back light of claim 1, wherein a light-blocking riser (50) is further fixed in the housing (10), and the light-blocking riser (50) is located at the connection position of the surface light source (20) and the light-emitting frame (30).

6. A lighting module for backlighting according to claim 5, wherein the height of the housing (10) is H, the height of the light-blocking riser (50) is H, 0.15H ≦ H ≦ 0.3H.