CN209979975U - Lateral-entering backlight module with light and thin structure - Google Patents

Abstract

The utility model discloses a side-entry backlight module with a light and thin structure, which comprises a lower shell (1), a lampshade (2), a lamp strip (3), a light guide plate (4) and a diaphragm structure (5), wherein the lamp strip (3) is installed in the lampshade (2), the lampshade (2) is fixed on the lower shell (1), and the light guide plate (4) and the diaphragm structure (5) are both fixed in the lower shell (1); the lower shell (1) is a plastic part, the bottom of the lower shell (1) is of a hollow structure, and the lampshade (2) is a metal part; the light guide plate (4) is of a wedge-shaped structure, and the light bar (3) enters light from the thicker side of the light guide plate (4); the light guide plate (4) is distributed with a mesh point structure, and mesh points on the light guide plate gradually transition from thick side to thin side. The utility model is used for alleviate backlight unit's weight, attenuate backlight unit's volume.

Description

Lateral-entering backlight module with light and thin structure

Technical Field

The utility model relates to a backlight technical field, concretely relates to frivolous side income formula backlight unit of structure.

Background

The backlight source is a structure for providing a light source for a display device from the back, for example, a backlight module of a display, and the displays in the market at present mostly use liquid crystal displays, which cannot emit light, and need to realize a display function by means of the backlight source provided by the backlight module; the liquid crystal display panel is thin and fragile, and the liquid crystal display panel can be installed and used only by using the backlight module as a structural member, so that the backlight module is not only a light source of the liquid crystal display, but also a structural member of the liquid crystal display, and is very important for the liquid crystal display.

The backlight module needs to support the self structure and the liquid crystal panel, so that the stability of the structure needs to be considered; the backlight module needs to provide a surface light source for the liquid crystal panel, and the optical effect of the liquid crystal display can be ensured only if the backlight module emits light uniformly, so that the uniformity of the light emission of the backlight module is also an important performance of the backlight module; the existing backlight module mostly uses an LED light bar as a backlight source, an LED can only convert a part of electric energy into light energy, most of the electric energy is released in the form of heat energy, the service life and the performance of the LED are directly influenced by the temperature of a use environment, and therefore the heat radiation performance is also an important parameter index of the backlight module; in addition, the trend of the display is to make the display thinner. The existing backlight module is difficult to give consideration to structural stability, light-emitting uniformity and heat dissipation performance while realizing lightness and thinness.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to the not enough in the background art, provide the frivolous side income formula backlight unit of structure 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 with a light and thin structure comprises a lower shell, a lampshade, a lamp strip, a light guide plate and a diaphragm structure, wherein the lamp strip is installed in the lampshade, the lampshade is fixed on the lower shell, and the light guide plate and the diaphragm structure are both fixed in the lower shell; the lower shell is a plastic part, the bottom of the lower shell is of a hollow structure, and the lampshade is a metal part; the light guide plate is of a wedge-shaped structure, and the light bar enters light from the thicker side of the light guide plate; the light guide plate is distributed with a mesh point structure, and mesh points on the light guide plate are gradually transited from thick side to thin side.

Further, the lamp shade is the U-shaped structure, the upside bonding of lamp shade is fixed on the downside of inferior valve, the lamp shade still passes through the screw spiro union on the inferior valve.

Further, the face that the inferior valve bonded lamp shade is multistage stair structure, and is close to the step height of light guide plate one side and lower, the lamp shade forms the space with inferior valve connection back between the two, light guide plate and/or diaphragm structure can insert in the space between lamp shade and inferior valve.

Further, the lamp shade is connected with a grounding sheet, and the grounding sheet is connected to the back of the lower shell.

Further, still be provided with the recess on the inferior valve medial surface, the structural lug that is provided with of light guide plate and diaphragm, the lug of light guide plate and diaphragm structure is all gone into recess and inferior valve installation into.

Furthermore, the side surface of the groove is of a step structure, and each step is used for installing the convex block on the light guide plate and the diaphragm structure respectively.

Furthermore, an adhesive tape is bonded on the bump, the adhesive tape bonds and fixes the light guide plate and the membrane structure on the lower shell, and the upper surface of the bonded adhesive tape is flush with the upper surface of the highest step of the step structure.

Furthermore, a positioning hole is formed in the protruding block, a positioning column is arranged on the lower shell, and the positioning column is inserted into the positioning hole formed in the protruding block.

Further, the light bar comprises a connecting wire, and the connecting wire is an FPC (flexible printed circuit); the connecting wire is connected in the front of the light bar and extends out of the front of the light bar after being bent and attached to the back of the light bar.

Further, the lamp strip includes the connecting wire, the connecting wire is the wire.

The utility model discloses the beneficial effect who realizes mainly has following several: the heat dissipation performance of the backlight module can be ensured by adopting the lamp shade made of metal material; the utilization rate of light emitted by the light bar can be increased, and the energy efficiency of the backlight module can be improved; the light bar can be protected, and is not easy to deform when the backlight module is deformed by external force, so that the circuit of the light bar and the lamp are prevented from being damaged; and the lamp shade of metal material and the inferior valve of plastic material are installed together and can be strengthened backlight unit's intensity, and metal lamp shade combines with both inferior valves, is convenient for like this produce the line equipment. The hollow plastic lower shell is adopted, so that the structural strength of the backlight module can be ensured, and the weight of the backlight module is reduced. The light guide plate with the wedge-shaped structure can be matched with a lamp with larger appearance and brighter brightness, so that the brightness of the backlight module is improved, the lightness and thinness of the backlight module are realized, the use of raw materials is reduced, and the material cost of a product is reduced; meanwhile, the light guide plate is provided with the mesh point structure, so that the uniformity of light emission of the backlight module is ensured. In a word, under the condition of ensuring each performance of the backlight module, the backlight module is thinned.

Drawings

Fig. 1 is an exploded schematic view of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a lower case of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of the portion B in FIG. 2;

fig. 5 is a schematic structural view of a grounding plate of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a reflector of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a light guide plate of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a light-diffusing sheet of a side-entry backlight module with a light-weight and thin structure according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a brightness enhancement film of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a light bar of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

FIG. 11 is an enlarged view of the portion C of FIG. 10;

fig. 12 is a schematic view of a longitudinal cross-sectional structure of a lower case, a lampshade, a light bar, a light guide plate, and a diaphragm of a side-entry backlight module with a light and thin structure according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a rubber strip of a side-entry backlight module with a light and thin structure according to an 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 ~ 13, a side-entry backlight module with a light and thin structure comprises a lower shell 1, a lamp shade 2, a lamp strip 3, a light guide plate 4 and a diaphragm structure 5, wherein the lower shell 1 is used as an integral installation structure of the lamp shade 2, the light guide plate 4 and the diaphragm structure 5 and is also used as an installation structure of a liquid crystal panel of a terminal display, the lower shell 1 is preferably made of a light plastic part, the bottom of the lower shell 1 is provided with a hollow structure, for example, a plurality of hollow parts 13 are arranged in fig. 2, so that the structural strength is ensured, and the weight of the backlight module can be reduced, the lamp strip 3 is adhered and fixed in the lamp shade 2 through heat-conducting double-sided adhesive, the lamp strip 3 radiates heat through the lamp shade 2 during operation, the lamp shade 2 can guide the light emitted by the lamp strip 3 to the maximum extent, so that the utilization rate of light and the energy efficiency of the module are improved, the lamp shade 2 is preferably made of a metal part, such as an.

Referring to fig. 1 ~ 11, the light guide plate 4 and the diaphragm structure 5 are fixed in the lower case 1 to form a light scattering structure together, and convert a point light source emitted by the light bar into a surface light source to form a backlight module that emits light uniformly, the light guide plate 4 is a wedge-shaped structure, and the light bar 3 enters from the thicker side of the light guide plate 4, so that a light source with a larger shape and higher brightness (e.g., 3.0mm × 1.4mm LED lamp) can be used to cooperate with the light guide plate to reduce the overall structure of the light guide plate while increasing the brightness of the module, thereby reducing and thinning the backlight module, and achieving the lightness and thinness of the backlight module.

Referring to fig. 6 and 12, the lampshade 2 may be configured to have an L-shaped cross section or a U-shaped cross section, preferably, the cross section is configured to have a U-shaped cross section, and an opening of the U-shaped cross section faces the light guide plate, so that the light emitted from the light bar is reflected to the light guide plate from the upper, lower and rear sides of the light bar, and the utilization rate of the light emitted from the light bar is higher; in addition, a coating with better light reflecting performance is preferably coated on the inner side of the lampshade 2 or a membrane with better light reflecting performance is bonded on the inner side of the lampshade, so that the reflection efficiency of the lampshade is further improved, and the service efficiency of light emitted by the lamp strip is improved. In the embodiment, the lampshade 2 with a U-shaped cross section is taken as an example for explanation, and the light bar 3 is adhered to the bottom of the U-shaped structure through a heat-conducting double-sided adhesive tape; the lampshade 2 and the lower shell 1 are mounted as follows: the lower shell 1 is provided with a strip-shaped groove 14 at the position for mounting the lampshade 2 (the groove is formed in the bottom surface of the outer side of the lower shell 1, the upper side of the lower shell 1 is not communicated, and one side close to the light guide plate is communicated so that the light bar can emit light to the light guide plate), and the upper side of the lampshade 2 is fixedly bonded on the lower side surface of the lower shell 1 (namely the top surface of the groove) through a double-sided adhesive tape 9; the lampshade 2 is also screwed on the lower shell 1 through a screw, a screw hole 21 can be formed in the lower side surface of the lampshade 2, and the lampshade 2 is screwed and fixed on the lower shell 1 from the back of the lower shell 1 through the screw; the lamp shade is fixed more stably and reliably by adopting a bonding and screw connection matching mode.

Referring to fig. 12, as a preferred embodiment, the surface of the lower case 1 bonded to the lamp housing 2 (i.e., the top surface of the groove) has a multi-step structure, and the step height near the light guide plate 4 is lower, a gap is formed between the lamp housing 2 and the lower case 1 after the lamp housing 2 and the lower case 1 are connected, and the light guide plate 4 and/or the diaphragm structure 5 may be inserted into the gap between the lamp housing 2 and the lower case 1 for fixed installation; for example, fig. 12 shows a manner of providing two steps on the lower case 1, where one step is used to cooperate with the lamp shade 2, and the other step is used to cooperate with the light guide plate and the diaphragm structure, so that the light guide plate and the diaphragm structure can be clamped in a gap formed between the lamp shade and the lower case, thereby better fixing the light guide plate and the diaphragm structure, and making up for the defect that the upper frame is not provided to fix the diaphragm structure; meanwhile, the adhesive tape 9 for bonding the lampshade 2 can be arranged wider, so that the adhesive tape can be bonded to the two stages of steps, the light guide plate and the diaphragm structure can be further bonded with the lower shell through the adhesive tape 9, the bonding reliability of the light guide plate and the diaphragm structure with the lower shell is further enhanced, and the adhesive tape is convenient and quick to bond; for example, the light guide plate and the light diffuser may be mounted in the gap, and the light diffuser and the lower case 1 may be fixed by bonding with the adhesive tape 9. In addition, the step structure may be provided in more than two stages, for example, three stages, to fix the lamp cover, the light guide plate, and the diaphragm structure, respectively.

Referring to fig. 6, the light bar is generally an LED light bar made of an LED lamp and a PCB, and the LED lamp is sensitive to static electricity and is easily damaged by the static electricity, so that the ground strip 6 is connected to the lamp housing 2, and the ground strip is generally a metal strip. The grounding plate 6 can be provided with a screw hole 61, the grounding plate 6 and the lampshade 2 are screwed and fixed on the lower shell 2 together through the same screw, and the grounding plate 6 is fixed on the grounding plate mounting position 15; grounding lug 6 is connected to the back of inferior valve 1, when the equipment preparation display terminal, can be connected grounding lug 6 and display terminal's ground wire, static on the release lamp shade 2 that the during operation can be timely avoids static to damage the lamp on the lamp strip 3. In addition, the grounding plate 6 can be arranged at other positions of the lower shell except the lampshade to protect various structures installed on the lower shell.

Referring to fig. 3, 4 and 7 ~ 9, a groove 11 is further formed in the inner side surface of the lower case 1, bumps 7 are arranged on the light guide plate 4 and the diaphragm structure 5, the bumps 7 of the light guide plate 4 and the diaphragm structure 5 are clamped into the groove 11 and are mounted with the lower case 1, so that the mounting stability of the light guide plate 4 and the diaphragm structure 5 can be further guaranteed, meanwhile, adhesive tapes 8 can be bonded above the groove, the light guide plate 4 and the diaphragm structure 5 are fixed on the lower case 1 above the bumps 7 of the light guide plate 4 and the diaphragm structure 5, and the mounting of the light guide plate 4, the diaphragm structure 5 and the lower case 1 is further enhanced.

Referring to fig. 3 and 4, as a preferred embodiment, the side surface of the groove 11 is preferably configured as a step structure, each step is used for installing the bump 7 on the light guide plate 4 and the diaphragm structure 5, after the step structure is configured, the bumps 7 on the light guide plate 4 and the diaphragm structure 5 can be configured to have different sizes, the smaller bump 7 on the light guide plate 4 of the lower layer is configured to be matched with the step of the lower layer, and the larger bump 7 on the diaphragm structure 5 of the upper layer is configured to be matched with the step of the upper layer, so that the wrong installation position can be avoided when the light guide plate and the diaphragm structure are installed. When the adhesive tape 8 with a small thickness and a negligible thickness is adopted, the groove 11 can be arranged as follows: the upper surface of the uppermost layer of the bump 7 is level with the upper surface of the highest step of the side step structure of the groove 11 after being clamped into the groove 11; an adhesive tape 8 is bonded on the bump 7 on the uppermost layer, and two sides of the adhesive tape 8 are bonded on the surface of the highest step of the step structure on the side surface of the groove 11; when the adhesive tape 8 with a certain thickness is needed, the groove preferably adopts the following structure: if a four-level step structure is arranged in fig. 3, the step 11a at the lowest level is matched with the bump on the light guide plate, the step 11b at the second level is matched with the bump on the diaphragm structure, the step of the third layer 11c is bonded with the adhesive tape 8, the adhesive tape 8 is bonded with the step 11d at the uppermost level (the step is used as the step for installing the display terminal on the lower shell 1), and the display terminal can be installed better. The adhesive tape 8 may have an adhesive surface on the lower front surface or on both lower sides, and fig. 13 shows a structure in which the adhesive surfaces are disposed on both sides and the adhesive surface is not disposed in the middle. In addition, as shown in fig. 4, the insertion holes 16 may be provided on the inner side surface of the lower case 1, and the protrusions 7 of the light guide plate may be inserted into the insertion holes 16 to fixedly mount the light guide plate.

Referring to fig. 1, 3, 4, and 7 ~ 9, the film structure 5 includes a reflective sheet 51, a light diffuser 52, a lower light diffuser 53, and an upper light diffuser 54, the reflective sheet 51 can be adhered to the bottom surface of the inner side of the lower case 1, the light guide plate 4, the light diffuser 52, the lower light diffuser 53, and the upper light diffuser 54 are sequentially stacked on the reflective sheet 51, a positioning hole 71 is disposed on the bump 7 on the film, a positioning post 12 is disposed on the lower case 1, the positioning post 12 is inserted into the positioning hole 71 disposed on the bump 7 on the film, and the height of the positioning hole is equal to the height of the uppermost film, the positioning hole 71 can be configured as the hole structure in fig. 8, or as the notch structure in fig. 9, preferably, the hole structure and the notch structure are used in a matching manner, that not only a certain degree of freedom is ensured during the film installation, but also the stability of the film installation is ensured, and a black oil layer 521 can be.

Referring to fig. 10 and 11, the lamp strip 3 includes the connecting wire 31, the connecting wire 31 is connected in the front of 3 PCB boards of lamp strip, the connecting wire 31 can adopt FPC or wire, and when adopting FPC, the connecting wire 31 welds in the front of lamp strip 3 earlier after, and is buckled to the lamp strip back and is attached and stretch out lamp strip 3 behind the lamp strip back again and openly, and this kind of structure can avoid the connecting wire 31 to be broken by external force.

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 (10)

1. The utility model provides a structure frivolous side income formula backlight unit which characterized in that: the LED lamp comprises a lower shell (1), a lampshade (2), a lamp strip (3), a light guide plate (4) and a diaphragm structure (5), wherein the lamp strip (3) is installed in the lampshade (2), the lampshade (2) is fixed on the lower shell (1), and the light guide plate (4) and the diaphragm structure (5) are fixed in the lower shell (1); the lower shell (1) is a plastic part, the bottom of the lower shell (1) is of a hollow structure, and the lampshade (2) is a metal part; the light guide plate (4) is of a wedge-shaped structure, and the light bar (3) enters light from the thicker side of the light guide plate (4); the light guide plate (4) is distributed with a mesh point structure, and mesh points on the light guide plate gradually transition from thick side to thin side.

2. The edge-type backlight module of claim 1, wherein: the lampshade (2) is of a U-shaped structure, the upper side of the lampshade (2) is bonded and fixed on the lower side face of the lower shell (1), and the lampshade (2) is further screwed on the lower shell (1) through screws.

3. The edge-type backlight module of claim 2, wherein: the face that inferior valve (1) bonded lamp shade (2) is multistage stair structure, and is close to the step height of light guide plate (4) one side and lower, form the space between the two after lamp shade (2) are connected with inferior valve (1), light guide plate (4) and/or diaphragm structure (5) can insert in the space between lamp shade (2) and inferior valve (1).

4. The edge-type backlight module of claim 2, wherein: the lamp shade (2) is connected with a grounding piece (6), and the grounding piece (6) is connected to the back of the lower shell (1).

5. The light-weight and thin-structure side-entry backlight module as claimed in claim 1 ~ 4, wherein the inner side of the lower case (1) is further provided with a groove (11), the light guide plate (4) and the film structure (5) are both provided with bumps (7), and the light guide plate (4) and the bumps (7) of the film structure (5) are both clamped into the groove (11) and mounted on the lower case (1).

6. The edge-type backlight module of claim 5, wherein: the side surface of the groove (11) is of a step structure, and each step is used for installing the convex block (7) on the light guide plate (4) and the diaphragm structure (5).

7. The edge-type backlight module of claim 6, wherein: the light guide plate is characterized in that an adhesive tape (8) is bonded on the bump (7), the light guide plate (4) and the diaphragm structure (5) are bonded and fixed on the lower shell (1) by the adhesive tape (8), and the upper surface of the bonded adhesive tape (8) is level with the upper surface of the highest step of the step structure.

8. The edge-type backlight module of claim 7, wherein: the positioning structure is characterized in that a positioning hole (71) is formed in the protruding block (7), a positioning column (12) is arranged on the lower shell (1), and the positioning column (12) is inserted into the positioning hole (71) formed in the protruding block (7).

9. The side-in backlight module with a light and thin structure according to claim 1 ~ 4, wherein the light bar (3) comprises a connection wire (31), the connection wire (31) is FPC, and the connection wire (31) is connected to the front surface of the light bar (3) and bent and attached to the back surface of the light bar and then extended out of the front surface of the light bar (3).

10. The backlight module of claim 1 ~ 4, wherein the light bar (3) comprises a connecting wire (31), and the connecting wire (31) is a conductive wire.

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