CN211293524U - Side-in backlight module capable of improving light-emitting uniformity - Google Patents

Abstract

The utility model discloses a lateral entrance type backlight module capable of improving the luminous uniformity, which comprises a back plate, a lateral entrance type light source, an optical assembly and a front frame, wherein the lateral entrance type light source and the optical assembly are both arranged in the back plate, and the front frame is arranged on the back plate and presses and fixes the optical assembly in the back plate; the optical assembly comprises a light guide plate and a brightness enhancement film, and the brightness enhancement film is arranged above the light guide plate; the light guide plate is provided with an accommodating opening, and a light source of the side-in light source is accommodated in the accommodating opening; the light enhancement film is provided with a light extinction opening, and the position of the light extinction opening corresponds to the position of the accommodating opening. The utility model is used for make things convenient for backlight unit's equipment to promote backlight unit's visual effect.

Description

Side-in backlight module capable of improving light-emitting uniformity

Technical Field

The utility model relates to a backlight unit technical field, concretely relates to can improve side income formula backlight unit of luminous homogeneity.

Background

The backlight module is a light emitting component of a passive light emitting display such as a liquid crystal display, and the display can only realize the colorful display effect by providing a light source through the backlight module. The side-in type backlight module is a common backlight module, and has the characteristics of being light and thin, so that the side-in type backlight module is widely used. The side-in type backlight module comprises a back plate, a side-in type light source, an optical assembly and a front frame, wherein the optical assembly is generally arranged in the back plate, the side-in type light source is arranged in the back plate and at one side of the optical assembly, and the front frame is clamped on the back plate. The backlight module optical assembly and the side-in light source with the structure are installed in the back plate, so that the assembly of the backlight module is troublesome; and the side-in light source is easy to shine directly above, which affects the uniformity of overall lighting of the backlight module.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to the not enough in the background art, provide the side income formula backlight unit that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: a side-in type backlight module capable of improving light emitting uniformity comprises a back plate, a side-in type light source, an optical assembly and a front frame, wherein the side-in type light source and the optical assembly are arranged in the back plate; the optical assembly comprises a light guide plate and a brightness enhancement film, and the brightness enhancement film is arranged above the light guide plate; the light guide plate is provided with an accommodating opening, and a light source of the side-in light source is accommodated in the accommodating opening; the light enhancement film is provided with a light extinction opening, and the position of the light extinction opening corresponds to the position of the accommodating opening.

Furthermore, the accommodating opening and the extinction opening are both strip-shaped openings, and each light source of the side-entering light source is accommodated in the strip-shaped accommodating opening.

Furthermore, two opposite side edges of the light guide plate are provided with accommodating holes, and two opposite side edges of the bright enhancement film are provided with extinction holes; the side income formula light source is U-shaped structure, and the side income formula light source both sides position of U-shaped structure all is provided with the light source.

Further, the optical assembly further comprises a reflecting film, and the reflecting film is arranged on the back of the light guide plate; the lateral entrance type light source is characterized in that two sides of the lateral entrance type light source are provided with adhesive, the front side of the lateral entrance type light source is adhered to the light guide plate, and the back side of the lateral entrance type light source is adhered to the reflecting film.

Further, the front frame is bonded and fixed on the reflecting film.

Furthermore, the optical assembly also comprises a light-diffusing film, and the light-diffusing film and the light-adding film are sequentially stacked on the front surface of the light guide plate; the light-diffusing film and the light-adding film are both adhered and fixed on the light guide plate.

Further, be provided with the stair structure on the light guide plate, membrane and the membrane that adds lustre to all bond the stair structure through same double faced adhesive tape on.

Furthermore, the light guide plate is also provided with a positioning block, and the light-diffusing film and the light-adding film are provided with positioning holes which are matched with the positioning block.

The utility model discloses the beneficial effect who realizes mainly has following several: the light guide plate is provided with the accommodating opening for installing the side-entering light source, and the side-entering light source can be positioned through the accommodating opening during assembly, so that the side-entering light source can be quickly assembled without other structural alignment during installation, and the assembly efficiency of backlight touch is improved; and the light source of side income formula light source holds in holding the opening, and the light source is luminous in holding the opening of light guide plate, has reduced the outside light of shining the light guide plate to improve the luminous utilization ratio of light source, strengthen backlight unit's light efficiency. In addition, by means of the extinction hole formed in the bright enhancement film, the phenomenon that the backlight module shines right above the side-entering light source can be avoided, the visual effect of the backlight module is optimized, and the uniformity of the backlight module in light emitting is improved.

Drawings

Fig. 1 is an exploded schematic view of a side-entry backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural view of a lateral light source of a lateral backlight module according to a first embodiment of the present invention, which can improve the uniformity of light emission;

fig. 4 is a schematic structural view of a light guide plate of a lateral backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

FIG. 5 is an enlarged view of the portion B in FIG. 4;

fig. 6 is a schematic structural view of an upper brightness enhancement film of a side-entry backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

fig. 7 is a schematic structural view of a lower layer brightness enhancement film of a side-entry backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

fig. 8 is a schematic structural view of a light-diffusing film of a side-entry backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of a reflective film of a side-entry backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention;

fig. 10 is a schematic structural view of a front frame of a side-in type backlight module capable of improving light-emitting uniformity according to a first embodiment of the present invention.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1 to 10, a side-in type backlight module capable of improving light emitting uniformity includes a back plate 1, a side-in type light source 2, an optical assembly 3 and a front frame 4, where the back plate 1 is generally a structure having a bottom and four side plates, and may be formed by stamping a metal material; side income formula light source 2 and optical assembly 3 all set up in backplate 1, can bond through the adhesive tape and fix in backplate 1, also can the direct mount in backplate 1, adopt the latter structure in this embodiment for backlight unit's equipment is simpler. The front frame 4 is arranged on the back plate 1 and presses and fixes the optical assembly 3 in the back plate 1; after the optical component 3 is installed in the back plate 1, the front frame 4 is pressed on the optical component 3 and installed at the periphery, and the front frame 4 is clamped with the back plate 1, so that the optical component 3 is fixed in the back plate 1; the front frame 4 is preferably mounted inside the back plate 1 to better press-fix the optical module 3, which is the case in this embodiment.

Referring to fig. 1 to 10, the optical assembly 3 includes a light guide plate 31 and a brightness enhancement film 32, wherein the brightness enhancement film 32 is disposed above the light guide plate 31; the light guide plate 31 is provided with a receiving hole 311, and the light source 21 of the side-in light source 2 is received in the receiving hole 311; the brightness enhancement film 32 is provided with a light extinction opening 321, and the position of the light extinction opening 321 corresponds to the position and size of the accommodating opening 311. The light guide plate 31 is provided with the accommodating hole 311 for installing the side-in light source 2, and the side-in light source 2 can be positioned through the accommodating hole 311 during assembly, so that the side-in light source 2 can be quickly assembled without other structural alignment during installation, and the assembly efficiency of the backlight module is improved; and the light source 21 of the lateral light source 2 is accommodated in the accommodating hole 311, and the light source 21 emits light in the accommodating hole 311 of the light guide plate 31, so that light irradiating the outside of the light guide plate 31 is reduced, the light emitting utilization rate of the light source is improved, and the light effect of the backlight module is enhanced. In addition, by the way of forming the extinction opening 321 in the brightness enhancement film 32, the phenomenon that the backlight module shines right above the lateral light source 2 can be avoided, the visual effect of the backlight module is optimized, and the uniformity of the light emission of the backlight module is improved.

Referring to fig. 1, 2, 6 and 7, the accommodating opening 311 and the light extinction opening 321 may be provided in plurality, one for each light source 21 of the side-entry light source 2; the receiving opening 311 and the light extinction opening 321 may be provided as an elongated integral structure. In this embodiment, the accommodating opening 311 and the light extinction opening 321 are both elongated openings, and each light source 21 of the lateral light source 2 is accommodated in one elongated accommodating opening 311, so that the accommodating opening 311 and the light extinction opening 321 are easier to manufacture.

Referring to fig. 1, 2, 3, 6 and 7, for the side-in type backlight module with a shorter length, a single-side light-in mode may be adopted, and the side-in type light source 2, the accommodating opening 311 and the extinction opening 321 are correspondingly arranged in one group; for the side-in backlight module with a longer length, a double-edge light-in mode is preferably adopted, generally two opposite short edges are used for light-in, and two sets of the side-in light source 2, the accommodating opening 311 and the extinction opening 321 are correspondingly arranged. The side-in backlight module in this embodiment has a long length, so that in the latter mode, two opposite sides of the light guide plate 31 are both provided with the accommodating holes 311, and two opposite sides of the brightness enhancement film 32 are both provided with the extinction holes 321.

Referring to fig. 1 and 3, the optical assembly 3 further includes a reflective film 33, and the reflective film 33 is disposed on the back of the light guide plate 31; the two sides of the side-in light source 2 are both provided with adhesive, the front side of the side-in light source 2 is adhered to the light guide plate 31, and the back side of the side-in light source 2 is adhered to the reflecting film 33. The side-in light source 2 is preferably of a U-shaped structure, so that the side-in light sources on two sides form an integral structure, and the assembly is more convenient. The light sources 21 are arranged at two side positions 23 of the side-entering light source 2 of the U-shaped structure, and the light sources at the two sides respectively correspond to the group of accommodating holes 311 and the extinction holes 321. The intermediate position 22 is a connecting portion that integrally connects the structures on both sides. The double-sided adhesive tape 24 is disposed at the two side positions 23, and the front surface of the side-in light source 2 is adhered to the light guide plate 31 through the double-sided adhesive tape 24, so that the front surface of the side-in light source 2 is fixed to the light guide plate 31. The double-sided adhesive tape 25 is adhered to the back surface of the middle position 22, and the back surface of the side-in light source 2 is adhered to the reflecting film 33 through the double-sided adhesive tape 25, so that the side-in light source 2 and the reflecting film 33 are fixed. Thereby, the light guide plate 31, the side-entry light source 2, and the reflection film 33 are bonded together. In addition, the side-in light source 2 can be bent into a U-shaped structure through a straight strip-shaped structure, the double-sided adhesive tape 25 and the double-sided adhesive tape 24 are preferably adhered to the front surface of the straight strip-shaped side-in light source 2, the double-sided adhesive tape at the middle section after bending two edges at 90 degrees is positioned on the back surface of the middle section of the U-shaped structure, and the back surface reflection film 33 can be adhered, and the double-sided adhesive tapes at the front surfaces of two sides of the U-shaped structure side-in light source 2 are adhered to the light guide; the structure can only adopt a double-sided adhesive tape to bond the reflecting film 33 and the light guide plate 31, can reduce the bonding times of the double-sided adhesive tape and improve the assembly efficiency of the backlight module.

Referring to fig. 9, a double-sided adhesive tape 331 is disposed at an outer position on the reflective film 33, so that the front frame 4 is adhered and fixed on the reflective film 33 by the double-sided adhesive tape 331. Thus, the front frame 4, the light guide plate 31, the side-entry light source 2, and the reflective film 33 can be integrally bonded.

Referring to fig. 1 to 9, the optical assembly 3 further includes a light-diffusing film 34, and the light-diffusing film 34 and the light-adding film 32 are sequentially stacked on the front surface of the light guide plate 31; the light diffusing film 34 does not need to be provided with a light extinction hole at a position corresponding to the accommodating opening 311, so that the uniformity of light emission of the backlight module can be further improved. The light diffusing film 34 and the light diffusing film 32 are both adhered and fixed on the light guide plate 31, specifically, a step structure 312 can be arranged on the light guide plate 31, in this embodiment, a structure of a double-layer light diffusing film 32 is adopted, and the light diffusing film 34 has a three-layer structure, so that the step structure 312 is set as a three-level step, and the three-level step is used for adhering the two light diffusing films 32 and the one light diffusing film 34 respectively; the light diffusing film 34 and the light intensifying film 32 on the lower layer are both provided with an avoiding opening 37, the avoiding opening 37 is used for avoiding a step structure, the step structure can be contacted with the upper film to be bonded together, and the avoiding opening 37 on the light diffusing film 34 is larger than the light intensifying film 32 avoiding opening 37. Therefore, the light-diffusing film 34 and the upper and lower bright enhancement films 32 can be bonded to the step structure 312 through the same double-sided adhesive tape 36; preceding frame 4, light guide plate 31, side income formula light source 2, reflectance coating 33 membrane 34 that diffuses and upper and lower layer membrane 32 that adds lustre to can bond into holistic structure, can be fast when backlight unit assembles this overall structure through preceding frame 4 card solid in backplate 1, realize quick installation. Set up fixed step for the membrane 34 that looses and upper and lower layer membrane 32 that adds lustre to bond more level and smooth on light guide plate 31, thereby backlight unit's visual effect is better.

Referring to fig. 2, in order to make the light-diffusing film 34 and the upper and lower light-adding films 32 more accurately mounted on the light guide plate 31, it is preferable to further provide a positioning block 313 on the light guide plate 31, and to provide a positioning hole 35 on the light-diffusing film 34 and the upper and lower light-adding films 32, where the positioning hole 35 is adapted to the positioning block 313, so that the light-diffusing film 34 and the upper and lower light-adding films 32 can be quickly aligned by the cooperation of the positioning hole 35 and the positioning block 313 when mounted on the light guide plate 31, and the mounting accuracy of the light-diffusing film 34 and the upper and lower light-adding films.

Referring to fig. 1, in order to protect the backlight module after the backlight module is assembled and before the backlight module is used, a protective film 5 is further provided, the protective film is adhered to the front frame 4 through a double-sided adhesive tape 51, the protective film is prevented from being scratched, a dustproof effect is also achieved, and the protective film 5 is torn off when the backlight module is used.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (8)

1. The utility model provides a can improve side income formula backlight unit of luminous homogeneity which characterized in that: the optical module comprises a back plate (1), a side-in light source (2), an optical module (3) and a front frame (4), wherein the side-in light source (2) and the optical module (3) are both arranged in the back plate (1), the front frame (4) is arranged on the back plate (1), and the optical module (3) is pressed and fixed in the back plate (1); the optical assembly (3) comprises a light guide plate (31) and a brightness enhancement film (32), wherein the brightness enhancement film (32) is arranged above the light guide plate (31); the light guide plate (31) is provided with an accommodating hole (311), and the light source (21) of the lateral light source (2) is accommodated in the accommodating hole (311); the brightness enhancement film (32) is provided with a delustering opening (321), and the position of the delustering opening (321) corresponds to the position of the accommodating opening (311).

2. The edge-type backlight module of claim 1, wherein: the accommodating opening (311) and the extinction opening (321) are both long-strip-shaped openings, and each light source (21) of the lateral light source (2) is accommodated in the long-strip-shaped accommodating opening (311).

3. The edge-type backlight module of claim 2, wherein: two opposite side edges of the light guide plate (31) are respectively provided with an accommodating opening (311), and two opposite side edges of the bright enhancement film (32) are respectively provided with an extinction opening (321); the lateral entrance type light source (2) is of a U-shaped structure, and light sources (21) are arranged on two sides of the lateral entrance type light source (2) of the U-shaped structure.

4. The edge-type backlight module of claim 3, wherein: the optical assembly (3) further comprises a reflective film (33), the reflective film (33) being disposed on the back of the light guide plate (31); the two sides of the side-in light source (2) are both provided with adhesive, the front side of the side-in light source (2) is adhered to the light guide plate (31), and the back side of the side-in light source (2) is adhered to the reflecting film (33).

5. The edge-type backlight module of claim 4, wherein: the front frame (4) is bonded and fixed on the reflecting film (33).

6. The edge-type backlight module of claim 5, wherein: the optical assembly (3) further comprises a light-diffusing film (34), and the light-diffusing film (34) and the light-adding film (32) are sequentially stacked on the front surface of the light guide plate (31); the light-diffusing film (34) and the light-intensifying film (32) are both adhered and fixed on the light guide plate (31).

7. The edge-type backlight module of claim 6, wherein: the light guide plate (31) is provided with a step structure (312), and the light-diffusing film (34) and the light-adding film (32) are both bonded on the step structure (312) through the same double-faced adhesive tape.

8. The edge-type backlight module of claim 7, wherein: the light guide plate (31) is further provided with a positioning block (313), the light-diffusing film (34) and the light-adding film (32) are provided with positioning holes (35), and the positioning holes (35) are matched with the positioning block (313).

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