CN216083166U

CN216083166U - Lamp glue, backlight module and display screen

Info

Publication number: CN216083166U
Application number: CN202122217303.7U
Authority: CN
Inventors: 刘阳; 黄欣; 黄清华; 刘波; 刘文韬
Original assignee: Shenzhen City Sanbum Photoelectric Co ltd
Current assignee: Shenzhen City Sanbum Photoelectric Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-03-18
Anticipated expiration: 2031-09-13

Abstract

The utility model discloses a lamp glue, a backlight module and a display screen. The lamp glue is used for bonding the fixed circuit board and the light guide plate, the lamp glue is provided with at least one first through hole and at least one second through hole, the first through hole and the second through hole are used for the LED lamp to pass through, the opening size of the width direction of the lamp glue is smaller than that of the second through hole along the width direction of the lamp glue. Backlight unit includes above-mentioned lamp and glues, and the display screen includes above-mentioned backlight unit. Above-mentioned lamp is glued, backlight unit and display screen glues the opening size difference of width direction through first through-hole and second through-hole edge lamp, and the light that average light guide plate is close to light department distributes, solves the uneven problem of brightness in light department, has good light effect and display effect.

Description

Lamp glue, backlight module and display screen

Technical Field

The utility model relates to the technical field of illumination, in particular to a lamp glue, a backlight module and a display screen.

Background

In the design and manufacture of the backlight module, the processing of the socket effect is an important link. When the socket effect of the light guide plate is processed, the problem of uneven brightness distribution can be encountered. The light guide plate mold is processed again, so that the project process is influenced, and the research and development cost is increased. Therefore, it is necessary to perform effective balanced neutralization on light rays and quickly solve the optical abnormality problem aiming at the problem of uneven brightness at the position of the light guide plate close to the LED lamp without modifying the light guide plate.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the lamp glue which can adjust the light-emitting brightness of the LED lamp and solve the problem of uneven brightness distribution of a lamp opening.

The utility model also provides a backlight module with the lamp glue.

The utility model also provides a display screen with the backlight module.

The lamp glue is used for bonding and fixing a circuit board and a light guide plate, and is provided with at least one first through hole and at least one second through hole, the first through hole and the second through hole are used for an LED lamp to pass through, and the opening size of the first through hole in the width direction of the lamp glue is smaller than the opening size of the second through hole in the width direction of the lamp glue.

The lamp glue provided by the embodiment of the utility model at least has the following beneficial effects: because the opening size of first through-hole is less than the opening size of second through-hole, the lamp glues less at the absorptive light of second through-hole department, and the light zone that goes out that the light guide plate corresponds with the second through-hole has higher luminance, and the light distribution of average light guide plate department near the light entrance solves the uneven problem of light and dark in light entrance department.

According to some embodiments of the utility model, the first and second through holes are rectangular.

According to some embodiments of the utility model, the second through hole comprises a mounting area and a light-transmitting area, the mounting area is used for the LED lamp to pass through, the light-transmitting area is used for the light emitted by the LED lamp to pass through, the mounting area is rectangular, and the light-transmitting area is trapezoidal.

According to some embodiments of the present invention, the lamp glue is provided with a first end surface along a width direction, the first end surface is used for facing the light guide plate, a distance between an inner surface of the first through hole and the first end surface is greater than 0.5mm, and a distance between an inner surface of the second through hole and the first end surface is greater than 0.5 mm.

According to some embodiments of the utility model, the glue further comprises pre-cut grooves for reducing the bending strength of the glue.

According to some embodiments of the utility model, the pre-cut groove is provided at a bend of the lamp cement.

According to some embodiments of the utility model, the lamp glue comprises black and white glue, the black glue comprises a black surface and a white surface, the black surface of the black and white glue is used for being bonded with the light guide plate, and the white surface of the black and white glue is used for being bonded with the circuit board.

According to some embodiments of the utility model, the material of the substrate of the black and white glue is selected to be PET.

The backlight module according to the second aspect of the utility model includes the lamp glue of the first aspect of the utility model, and further includes a circuit board, a light guide plate, and a plurality of LED lamps, wherein two side surfaces of the lamp glue are respectively adhered and fixed to the circuit board and the light guide plate, each LED lamp is fixed to the circuit board, one LED lamp penetrates through each first through hole, one LED lamp penetrates through each second through hole, and a light emitting surface of each LED lamp faces one end of the light guide plate.

The backlight module according to the embodiment of the utility model at least has the following beneficial effects: by applying the lamp glue disclosed by the embodiment of the first aspect of the utility model, the light distribution of the light guide plate close to the lamp opening is averaged, the problem of uneven brightness at the lamp opening is solved, and the backlight module has a good lamp effect.

The display screen according to the embodiment of the third aspect of the utility model comprises the backlight module according to the embodiment of the second aspect of the utility model.

The display screen provided by the embodiment of the utility model at least has the following beneficial effects: by applying the backlight module of the embodiment of the second aspect of the utility model, the problem of uneven brightness at the lamp socket is solved, so that the display screen has good display effect.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a cross-sectional view of a lamp cement in accordance with an embodiment of the first aspect of the present invention;

FIG. 2 is a cross-sectional view of a further embodiment of the glue of FIG. 1;

FIG. 3 is a schematic view of the assembly of the LED lamp with the lamp gel of FIG. 2;

FIG. 4 is a schematic view of a backlight module according to a second embodiment of the present invention.

Reference numerals:

a lamp glue 100;

a through hole 200, a first through hole 210, a second through hole 220, a mounting region 221, a light-transmitting region 222;

an LED lamp 300, a light exit surface 310;

a circuit board 400;

a connecting medium 500;

a light guide plate 600;

a pre-cut groove 700;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

A lamp paste 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

Referring to fig. 1, the lamp paste 100 according to the embodiment of the first aspect of the present invention is used for adhering and fixing a circuit board 400 and a light guide plate 600, the lamp paste 100 is provided with at least one first through hole 210 and at least one second through hole 220, the first through hole 210 and the second through hole 220 are both used for an LED lamp 300 to pass through, and an opening size of the first through hole 210 in a width direction of the lamp paste 100 is smaller than an opening size of the second through hole 220 in the width direction of the lamp paste 100.

Specifically, referring to fig. 3 and 4, the light adhesive 100 bonds and fixes the circuit board 400 and the light guide plate 600, the LED lamp 300 penetrates through the through hole 200 to be electrically connected to the circuit board 400, and the LED lamp 300 emits light along the light emitting surface 310. The opening size is extended along the light-emitting direction in second through-hole 220, makes second through-hole 220 be greater than the width of first through-hole 210 along the light-emitting direction along the width of light-emitting direction, and lamp glue 100 is less in the absorptive light of second through-hole 220 department, and light-emitting area that light guide plate 600 and second through-hole 220 correspond has higher luminance, and average light guide plate 600 is close to the light distribution of light department, solves the uneven problem of light and dark in light department.

Referring to fig. 1, according to some embodiments of the present invention, the first and second through

holes

210 and 220 are rectangular. Specifically, the lower end surface of the first through hole 210 is flush with the lower end surface of the second through hole 220, which is beneficial to positioning when the LED lamp 300 passes through. The second through hole 220 extends out of the light-transmitting area 222 along the light-emitting direction, so as to ensure the light-transmitting effect of the second through hole 220. The rectangular through hole is simple in shape rule, low in requirements on a processing die, convenient to process, low in processing cost and short in processing procedure.

Referring to fig. 2, according to some embodiments of the present invention, the second through hole 220 includes a mounting region 221 and a light-transmitting region 222, the mounting region 221 is used for the LED lamp 300 to pass through, the light-transmitting region 222 is used for the light emitted from the LED lamp 300 to pass through, the mounting region 221 has a rectangular shape, and the light-transmitting region 222 has a trapezoidal shape.

Specifically, in the second through hole 220, the mounting area 221 is rectangular, the mounting area 221 is provided with a light transmission area 222 along the light emitting direction, the light transmission area 222 is trapezoidal, and the length of the lower side of the trapezoid of the light transmission area 222 is smaller than the length of the upper side of the mounting area 221. When the LED lamp 300 passes through the second through hole 220, since the lower length of the light transmission region 222 is small, the LED lamp 300 cannot pass through the light transmission region 222, and therefore the LED lamp 300 can only pass through the mounting region 221, and the passing position of the LED lamp 300 is not shifted toward the light transmission region 222. Through setting up light transmission area 222 to trapezoidal, ensure that LED lamp 300 passes from predetermineeing the position when the installation, guaranteed light transmission area 222's printing opacity effect, in the assembling process with LED lamp 300, play the effect of preventing staying, improve assembly efficiency.

It is understood that the distribution of the first through holes 210 and the second through holes 220 may be an alternating distribution of the first through holes 210 and the second through holes 220 as shown in the figure, or may be an irregular distribution. In practice, to different light guide plates 600, the light distribution that light guide plate 600 is close to LED lamp 300 department is different, and in order to improve display effect, less department in light distribution sets up second through-hole 220 and increases luminance, and in the intensive department of light, sets up first through-hole 210, maintains original luminance, through the luminance of second through-hole 220 increase, balanced light distribution. Therefore, the specific arrangement of the first through holes 210 and the second through holes 220 may be different for different light guide plates 600, as long as the requirement for improving the display effect is satisfied.

Referring to fig. 1, according to some embodiments of the present invention, the lamp paste 100 is provided with a first end surface along a width direction, the first end surface is configured to face the light guide plate 600, a distance between an inner surface of the first through hole 210 and the first end surface is greater than 0.5mm, and a distance between an inner surface of the second through hole 220 and the first end surface is greater than 0.5 mm. Specifically, the first end face is the upper end face of the lamp cement shown in fig. 1, and when the distance between the upper end faces of the first through hole 210 and the second through hole 220 and the upper end face of the lamp cement 100 is less than 0.5mm, the fitting tightness of the lamp cement 100 is affected, which causes the problems of insufficient fitting strength and uneven fitting, so that the distance between the upper end faces of the first through hole 210 and the second through hole 220 and the upper end face of the lamp cement 100 needs to be greater than 0.5mm to ensure the fitting tightness of the lamp cement 100.

Referring to fig. 4, according to some embodiments of the present invention, the lamp cement 100 further includes a pre-groove 700, and the pre-groove 700 is used to reduce the bending strength of the lamp cement 100. Specifically, be provided with groove 700 in advance at lamp glue 100 and light guide plate 600 bonding part, through groove 700 in advance, the bending stress that receives when lamp glue 100 is crooked obtains the release, has reduced the bending strength of lamp glue 100, reduces the lamp glue 100 in laminating in-process rise to stick up, laminating insufficient scheduling problem, guarantees the laminating effect of lamp glue 100.

Referring to fig. 4, according to a further embodiment of the present invention, a pre-cut groove 700 is provided at a bend of the light adhesive 100. Light guide plate 600 thins to setting for thickness along light-emitting direction thickness gradually, the change of thickness makes light guide plate 600 form one section wedge transition inclined plane, lamp glue 100 is when inclined plane laminating light guide plate 600 and circuit board 400, the bending stress that the department of buckling of lamp glue 100 received is great, will cut groove 700 setting in advance in the department of buckling of lamp glue 100, the release bending stress that can great limit, full play is the effect of groove 700 in advance, make lamp glue 100 closely laminate with light guide plate 600 and circuit board 400, ensure the roughness after the laminating.

According to some embodiments of the present invention, the lamp paste 100 includes black and white paste, the black paste includes a black surface and a white surface, the black surface of the black and white paste is used for bonding with the light guide plate 600, and the white surface of the black and white paste is used for bonding with the circuit board 400. Specifically, in order to absorb light that is not incident on the light guide plate 600 from the LED lamp 300, the surface of the lamp paste 100 facing the LED lamp 300 is a black surface. Through the setting of black face, carry out effectual absorption to light, adjust light effect.

According to some embodiments of the utility model, the material of the substrate of black and white glue is chosen to be PET. The PET material has the advantages of good strength and temperature resistance, good insulating property, acid and alkali resistance, corrosion resistance and high pressure resistance, and the prepared finished product has strong viscosity, no residual glue and no burrs, is beneficial to die cutting and sizing, and is used as a base material of the black and white glue.

Referring to fig. 4, the backlight module according to the second aspect of the present invention includes the lamp adhesive 100 according to the first aspect of the present invention, and further includes a circuit board 400, a light guide plate 600, and a plurality of LED lamps 300, two side surfaces of the lamp adhesive are respectively adhered and fixed to the circuit board 400 and the light guide plate 600, each LED lamp 300 is fixed to the circuit board 400, one LED lamp 300 penetrates through each first through hole 210, one LED lamp 300 penetrates through each second through hole 220, and a light emitting surface 310 of each LED lamp 300 faces one end of the light guide plate 600.

Specifically, the circuit board 400 is electrically connected to the LED lamp 300 through the connection medium 500 at the through hole 200 of the lamp paste 100, and the lamp paste 100 bonds the circuit board 400 and the light guide plate 600. In the use of backlight unit, there is the uneven problem of light distribution in light guide plate 600 department of being close to LED lamp 300, leads to the lamp bright dark uneven in lamp socket department, and the display effect is not good. By applying the lamp glue 100 of the embodiment of the first aspect of the utility model, the second through holes 220 are arranged at the positions with less light distribution, and the light rays absorbed by the lamp glue at the positions of the second through holes 220 are less through the light-transmitting areas 222 of the second through holes 220, the light-emitting areas of the light guide plate 600 corresponding to the second through holes 220 have higher brightness, and the light distribution of the average light guide plate 600 close to the light source is optimized, so that the problem of uneven brightness at the light source is solved, and the backlight module has good light effect.

The display screen according to the embodiment of the third aspect of the utility model comprises the backlight module according to the embodiment of the second aspect of the utility model. By applying the display screen of the embodiment of the second aspect of the utility model, the problem of uneven brightness at the lamp socket is solved, so that the display screen has a good display effect.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

Claims

1. The lamp glue is characterized in that the lamp glue is used for bonding and fixing a circuit board and a light guide plate, the lamp glue is provided with at least one first through hole and at least one second through hole, the first through hole and the second through hole are used for allowing an LED lamp to pass through, the opening size of the lamp glue in the width direction is smaller than that of the second through hole in the width direction.

2. The light adhesive of claim 1, wherein the first through hole and the second through hole are rectangular.

3. The lamp glue of claim 1, wherein the second through hole comprises a mounting area and a light-transmitting area, the mounting area is used for the LED lamp to pass through, the light-transmitting area is used for the light emitted by the LED lamp to pass through, the mounting area is rectangular, and the light-transmitting area is trapezoidal.

4. The lamp glue of claim 1, wherein the lamp glue is provided with a first end surface along a width direction, the first end surface is used for facing a light guide plate, a distance between an inner surface of the first through hole and the first end surface is greater than 0.5mm, and a distance between an inner surface of the second through hole and the first end surface is greater than 0.5 mm.

5. The light glue of claim 1, further comprising a pre-cut groove for reducing the bending strength of the light glue.

6. The light cement of claim 5, wherein the pre-cut groove is arranged at a bent position of the light cement.

7. The lamp glue of claim 1, wherein the lamp glue comprises black and white glue, the black and white glue comprises a black surface and a white surface, the black surface of the black and white glue is used for bonding with the light guide plate, and the white surface of the black and white glue is used for bonding with the circuit board.

8. The lamp glue of claim 7, wherein the material of the substrate of the black-white glue is PET.

9. The backlight module is characterized by comprising the lamp glue of any one of claims 1 to 8, and further comprising a circuit board, a light guide plate and a plurality of LED lamps, wherein two side surfaces of the lamp glue are respectively adhered and fixed with the circuit board and the light guide plate, each LED lamp is fixed on the circuit board, one LED lamp penetrates through each first through hole, one LED lamp penetrates through each second through hole, and the light emergent surface of each LED lamp faces one end of the light guide plate.

10. A display screen comprising the backlight module of claim 9.