CN212694220U

CN212694220U - Backlight module and liquid crystal display device

Info

Publication number: CN212694220U
Application number: CN202021735945.5U
Authority: CN
Inventors: 刘欣; 朱寿天; 尤君平; 邹文聪
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-03-12
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a backlight module and liquid crystal display device. Wherein, this backlight unit includes: the surface of the back plate is concavely provided with an accommodating groove; the reflector plate is arranged on the surface of the back plate; the lamp source is arranged in the accommodating groove; the optical diaphragm is fixed on the surface of the back plate and covers the notch of the accommodating groove; the support is arranged in the accommodating groove and can be abutted to the optical diaphragm, and the support is further provided with a light reflecting structure which can reflect part of light rays emitted by the lamp source to the surface of the optical diaphragm. The utility model discloses technical scheme promotes backlight unit's the light-emitting luminance and the light-emitting degree of consistency, promotes backlight unit's light-emitting effect.

Description

Backlight module and liquid crystal display device

Technical Field

The utility model relates to a liquid crystal display technology field, in particular to backlight unit and applied this backlight unit's liquid crystal display device.

Background

In the direct type backlight module, the LED light source is arranged right opposite to the light emergent direction of the backlight module, so the light mixing distance is small. In addition, in the related art, the support for supporting the optical film is made of a light-transmitting material, and light energy needs to pass through the support and then be emitted, so that the support consumes part of the light source, the brightness of the light is weakened, the brightness of the part of the light reaching the diffusion plate is low, the problems of light spots with uneven brightness and support shadows and the like formed on the optical film are caused, and the problems of poor optical parameters such as poor brightness and uniformity of the light emitted by the backlight module are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a backlight unit aims at promoting backlight unit's light-emitting luminance and light-emitting degree of consistency, promotes backlight unit's light-emitting effect.

In order to achieve the above object, the present invention provides a backlight module, including:

the surface of the back plate is concavely provided with an accommodating groove;

the reflector plate is arranged on the surface of the back plate;

the lamp source is arranged in the accommodating groove;

the optical diaphragm is fixed on the surface of the back plate and covers the notch of the accommodating groove; and

the support, the support is located in the holding tank, the support can with optics diaphragm butt, the support still is equipped with reflection of light structure, reflection of light structure can with the partial light reflection that the lamp source jetted out arrives the surface of optics diaphragm.

In an embodiment of the present invention, the light reflecting structure is a light reflecting layer formed on the surface of the support;

or the reflecting structure is a reflecting area formed by the bracket and the reflecting sheet.

In an embodiment of the present invention, when the reflective structure is the support with the reflective region that the reflector plate forms, the reflector plate is equipped with lets a mouthful, the support is equipped with a supporting bench, the support passes let a mouthful, a supporting bench with the reflector plate butt, so that at least part of reflector plate forms the reflective region of arc.

In an embodiment of the present invention, the bracket includes:

the fixing plate is fixedly connected with the groove wall of the accommodating groove; and

the bracing piece, the bracing piece with the fixed plate deviates from the surface connection of backplate, prop up the protruding locating of brace table the lateral wall face of bracing piece, it is close to prop up the brace table the bracing piece is kept away from the tip setting of backplate, it keeps away from to prop up the brace table the side of bracing piece with the reflector plate butt, and make at least part formation of reflector plate the arc reflection of light district.

In an embodiment of the present invention, the end surface of the supporting rod deviating from the fixing plate is a plane or a cambered surface.

The utility model discloses an in an embodiment, the definition the degree of depth of holding tank is H1, the height of bracing piece is H2, the height of propping up supporting bench is H3, it keeps away from to prop up supporting bench the side of bracing piece is L with the distance of bracing piece, satisfies the condition: H1-H2 is more than or equal to 2mm and less than or equal to 4mm, and L is more than or equal to 3mm and less than or equal to 5 mm; h3 is more than or equal to 20mm and less than or equal to 30 mm.

In an embodiment of the present invention, the fixing plate, the supporting rod and the supporting platform are made of plastic material, and the fixing plate, the supporting rod and the supporting platform are of an integral structure.

In an embodiment of the present invention, the support rod is made of a transparent material.

In an embodiment of the present invention, an adhesive layer is disposed between the fixing plate and the groove wall of the accommodating groove;

or the fixing plate is connected with the groove wall of the accommodating groove through a connecting piece.

The utility model also provides a liquid crystal display device, liquid crystal display device include liquid crystal display and backlight unit, wherein, liquid crystal module includes:

the reflector plate is arranged on the surface of the back plate;

the lamp source is arranged in the accommodating groove;

The utility model discloses backlight unit among the technical scheme is including backplate, reflector plate, lamp source, optics diaphragm and support. The support is fixed on the surface of the back plate, can be abutted against the optical diaphragm and supports and fixes the optical diaphragm so as to prevent the optical diaphragm from being excessively deformed during transportation or use. And the support is also provided with a light reflecting structure which can reflect part of light emitted by the light source so as to intercept light energy which is originally emitted to the inside of the support and reflect and diffuse the intercepted light source, so that the light source can be uniformly reflected to each position on the surface of the optical membrane, the amount of light energy consumed by the support is reduced, and the brightness and the uniformity of the light emitted to the optical membrane are improved. The utility model discloses through being equipped with reflective structure on the support among the technical scheme to reduce the light energy that is consumed by the support, make backlight unit's play plain noodles can jet out luminance height, even light, promote backlight unit's light-emitting effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the bracket of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Backlight module	41	Fixing plate
10	Back plate	43	Support rod
				11	Accommodating tank	45	Supporting table
20	Lamp source	50	Optical film
				30	Reflector plate	51	Diffusion sheet
31	Arc reflecting area	53	Optical film
				40	Support frame

The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a backlight module 100.

Referring to fig. 1 and 2, in the embodiment of the present invention, the backlight module 100 includes a back plate 10, and a receiving groove 11 is concavely formed on a surface of the back plate 10;

the reflecting sheet 30, the said reflecting sheet 30 locates the surface of the said back plate 10;

the lamp source 20, the said lamp source 20 locates the said holding tank 11;

the optical film 50 is fixed on the surface of the back plate 10, and is arranged to cover the notch of the accommodating groove 11; and

the support 40 is arranged in the accommodating groove 11, the support 40 can be abutted to the optical film 50, and the support 40 is further provided with a light reflecting structure which can reflect part of light rays emitted by the light source to the surface of the optical film 50.

The utility model discloses backlight unit among the technical scheme is including backplate 10, reflector plate 30, lamp source 20, optics diaphragm 50 and support 40. The bracket 40 is fixed on the surface of the back plate, and the bracket 40 can abut against the optical film 50 and support and fix the optical film 50 to prevent the optical film 50 from being excessively deformed during transportation or use. In addition, the support 40 is further provided with a light reflecting structure, which can reflect a part of light emitted from the light source to intercept light energy that would be emitted to the inside of the support 40, and reflect and diffuse the intercepted light source, so that the light source can be uniformly reflected to each position on the surface of the optical film 50, the amount of light energy consumed by the support 40 is reduced, and the brightness and uniformity of light emitted to the optical film 50 are improved. The utility model discloses through being equipped with reflective structure on support 40 among the technical scheme to reduce the light energy that is consumed by support 40, make backlight unit 100's play plain noodles can jet out the luminance height and even light again, promote backlight unit 100's light-emitting effect.

Referring to fig. 1, the backlight module 100 in the embodiment of the present invention is a direct type backlight module 100. The material of the backplate 10 is a metal material, such as a stainless steel material, a ferrous material, an iron alloy material, etc., so as to improve the strength of the backplate 10 and prolong the service life of the backplate 10. Meanwhile, the back plate 10 made of metal material has better heat conductivity, and can quickly dissipate heat generated by the light source 20, so as to reduce the temperature in the accommodating groove 11 and avoid the over-high temperature of the backlight module 100. The Light source 20 may be an LED (Light Emitting Diode) lamp bead. The light source 20 is fixed to the wall surface of the accommodating groove 11 through an adhesive layer. Still shroud on the surface of lamp pearl has lens (not mark), can protect lamp source 20 on the one hand, and on the other hand can also carry out the secondary distribution to the light that LED jetted out for lamp source 20 jets out light evenly.

Referring to fig. 1, in an embodiment of the present invention, the backlight module 100 is further provided with an optical film 50, and an edge portion of the optical film 50 abuts against a surface of the back plate 10 and covers a notch of the accommodating groove 11. Thus, the optical film 50 can further diffuse, homogenize and mix the light emitted from the light source, and further optimize the light emitting effect of the backlight module 100, so that the backlight module 100 can provide a uniform and bright light source to a liquid crystal display (not shown). The optical film 50 includes a diffusion sheet 51, an optical film 53, a polarizer, and the like. Because only the edge portion of the optical film 50 abuts against the back plate 10, that is, the rest positions of the optical film 50 except the edge portion may be recessed toward one side of the accommodating groove 11 under the action of gravity, the light mixing distance is reduced, and the light processing effect is affected. Therefore, the support 40 can also support the optical film 50 when the optical film 50 is deformed, so as to prevent the optical film 50 from being excessively deformed and affecting the light mixing effect. It is to be understood that, in order to avoid the damage of the optical film 50 from the support 40 when supporting the optical film 50, the surface of the support 40 contacting the optical film 50 may be a plane or a circular arc surface, etc. Specifically, the end surface of the supporting rod 43 of the bracket 40, which faces away from the fixing plate 41, may be set to be a plane or a cambered surface structure, so as to increase the contact area between the supporting rod 43 and the optical diaphragm 50, and avoid the optical diaphragm 50 from being scratched by the sharp supporting rod 43.

In an embodiment of the present invention, the light reflecting structure is a light reflecting layer formed on the surface of the support 40; or, the light reflecting structure is a light reflecting area 31 formed by the bracket 40 and the reflector 30.

When the light reflecting structure is the light reflecting area 31 formed by the support 40 and the reflector 30, the reflector 30 is provided with a position-giving opening (not labeled), the support 40 is provided with a support platform 45, the support 40 penetrates through the position-giving opening, and the support platform 45 is abutted against the reflector 30, so that at least part of the reflector 30 forms the arc-shaped light reflecting area 31.

The utility model discloses an in the embodiment, reflective structure can have multiple form, for example, reflective structure can be the reflector layer that support 40 surface formed, and this reflector layer can be reflective paper, and the surface of support 40 is located in the subsides of reflective paper, and the reflector layer also can be pearly-lustre oil layer, reflective paint etc.. The light reflecting structure may also be a light reflecting region 31 formed by the support 40 and the reflector 30 together. Usually, the reflective sheet 30 is attached to the surface of the back plate 10, and the reflective sheet 30 is further provided with a position-giving opening. Specifically, the bracket 40 is fixed to the backboard 10, and an end of the bracket 40 away from the backboard 10 can pass through the relief opening, so that the support platform 45 provided on the bracket 40 can support at least a part of the reflector 30, so that the supported part of the reflector 30 forms the arc-shaped light reflecting area 31. The arc-shaped light reflecting region 31 intercepts most of light energy which is to be emitted to the inside of the bracket 40 originally, and uniformly reflects the light to each position of the optical diaphragm 50 through the reflection and diffusion effects of the reflector 30, so that the amount of the light energy consumed by the bracket 40 is reduced, and the brightness of the light emitted to the optical diaphragm 50 is improved.

Meanwhile, under the condition of equal distance, the arc-shaped reflecting area 31 formed by the reflecting sheet is longer than the length of the linear bracket 40, and the light receiving points are more, so that the reflecting area 31 can receive more light emitted by the light source. Thus, more light can be received and reflected by the light reflecting area 31, and the uniformity of the emitted light is further improved. Moreover, since the arc-shaped light reflecting region 31 is formed by the reflector 30, the reflector 30 has high light reflectivity, so that the loss of light energy can be further reduced, and the brightness of the reflected light can be ensured. The utility model discloses backlight unit 100 among the technical scheme makes backlight unit 100's play plain noodles can jet out even and the high light of luminance, promotes backlight unit 100's light-emitting effect.

Referring to fig. 2, in an embodiment of the present invention, the bracket 40 includes:

the fixing plate 41 is fixedly connected with the groove wall of the accommodating groove 11; and

the supporting rod 43, the supporting rod 43 with the fixed plate 41 deviates from the surface connection of backplate 10, brace table 45 locates convexly the lateral wall surface of supporting rod 43, brace table 45 is close to the bracing piece 43 is kept away from the tip setting of backplate 10, brace table 45 keep away from the side of bracing piece 43 with reflector plate 30 butt, so that reflector plate 30's at least part forms arc reflection of light district 31.

In an embodiment of the present invention, the bracket 40 includes a fixing plate 41 and a supporting rod 43 connected to each other. The fixing plate 41 is used to be fixedly connected with the back plate 10. Specifically, be equipped with the gluing layer between the cell wall of fixed plate 41 and holding tank 11, like this, fixed plate 41 can realize the fixed with backplate 10 through the mode of gluing. The adhesive layer can improve the fixing efficiency of the bracket 40 and the back plate 10. The adhesive layer can be strong glue or double-sided glue.

In addition, the surface of the fixing plate 41 is provided with fixing holes (not shown), the groove wall of the receiving groove 11 is provided with connecting holes, and the fixing plate 41 and the groove wall of the receiving groove 11 are detachably connected to the groove wall of the receiving groove 11 through the cooperation of the connecting member and the connecting holes and the fixing holes, so as to detachably fix the bracket 40 on the back plate 10.

It should be noted that the fixing plate 41, the supporting rod 43 and the supporting base 45 are made of plastic material, such as ABS (Acrylonitrile Butadiene Styrene plastic, terpolymer of Acrylonitrile, Butadiene and Styrene), POM (Polyoxymethylene), PS (Polystyrene), PMMA (polymethyl methacrylate), PC (Polycarbonate), PET (polyethylene glycol terephthalate), etc., so that the mass of the bracket 40 can be reduced to save cost. In order to prevent the light-emitting effect of the backlight module 100 from being affected by the bracket 40, the material of the bracket 40 is preferably a material with good light transmittance, such as PMMA, PS, PC, and the like.

In order to reduce the material cost, the support base 45 and the portion of the support rod 43 above the support base 45 may be made of a transparent material, and the rest of the bracket 40 may be made of a common material.

Referring to fig. 2, in an embodiment of the present invention, the depth of the accommodating groove 11 is defined as H1, the height of the supporting rod 43 is defined as H2, and the following conditions are satisfied: H1-H2 is more than or equal to 2mm and less than or equal to 4 mm.

The utility model provides an among the technical scheme of an embodiment, the holding tank 11 that highly is less than of bracing piece 43, under the normality promptly, there is the clearance top and the optics diaphragm 50 of bracing piece 43, only when optics diaphragm 50 takes place to warp, the top of bracing piece 43 just with optics diaphragm 50 butt to the realization is to the support of optics diaphragm 50. Through being equipped with the clearance with the top of bracing piece 43 and optics diaphragm 50, can also avoid destroying optics diaphragm 50 at the in-process supporting member of transportation, assembly, promote the reliability of structure.

In an embodiment of the present invention, the supporting platform 45 is defined to be far away from the side of the supporting rod 43 and the distance between the supporting rod 43 is L, the height of the supporting platform 45 is H3, and the following conditions are satisfied: l is more than or equal to 3mm and less than or equal to 5 mm; h3 is more than or equal to 20mm and less than or equal to 30 mm.

The utility model discloses an among the technical scheme of an embodiment, the side that bracing piece 43 was kept away from to brace table 45 is the width of brace table 45 with the distance of bracing piece 43, with the size of brace table 45's width and the arc reflection of light district 31 that brace table 45 height dimension decided reflector plate 30 formed. Generally, the larger the size of the arc-shaped light reflecting area 31 is, the more the received light energy is, the more the light energy is reflected by the arc-shaped light reflecting area 31, the utilization rate of the light energy of the LED lamp can be greatly improved, the overall brightness of the light source reaching the optical diaphragm 50 is improved, the brightness of the edge of the optical diaphragm 50 is further compensated, the lamp is weakened to form a shadow, and the occurrence of the shadow of the bracket 40 is avoided in design. By optimizing the size of the supporting platform 45, the uniformity and brightness of the light emitted from the backlight module 100 are further improved. Relatively with prior art in, need use more lamp sources 20, thicker diffuser plate, more diaphragms in order to optimize the mode to backlight unit 100's light-emitting effect, the embodiment of the utility model provides an in the scheme only need optimize support 40 and reflector plate 30 and just can reach equivalent effect to backlight unit 100 cost has been reduced.

The utility model discloses an among the technical scheme of an embodiment, still be equipped with a plurality of fixed points on the reflector plate 30, in fixed point department, can also be fixed in the surface of backplate 10 through viscose or double faced adhesive tape to ensure the fixed uniformity of reflector plate 30. Furthermore, the reflective sheet 30 may be provided with a fold line, and the fold line is provided at the periphery of the support 40, so as to form the arc-shaped reflective region 31 with high regularity and consistency.

The utility model discloses still provide a liquid crystal display device, this liquid crystal display device include liquid crystal display and backlight unit 100, and above-mentioned embodiment is referred to this backlight unit 100's concrete structure, because this liquid crystal display device has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer gives unnecessary details here one by one. The liquid crystal display screen is disposed on one side of the light emitting surface of the backlight module 100, and the liquid crystal display screen can be fixed on one side of the light emitting surface of the backlight module 100 in an adhesive manner.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A backlight module, comprising:

the reflector plate is arranged on the surface of the back plate;

the lamp source is arranged in the accommodating groove;

the support, the support is located in the holding tank, the support with the optics diaphragm butt, the support still is equipped with reflecting structure, reflecting structure will the partial light reflection that the lamp source jetted out arrives the surface of optics diaphragm.

2. The backlight module as claimed in claim 1, wherein the light reflecting structure is a light reflecting layer formed on the surface of the frame;

3. The backlight module as claimed in claim 2, wherein when the reflective structure is a reflective region formed by the frame and the reflective sheet, the reflective sheet has a position-giving opening, the frame has a supporting platform, the frame passes through the position-giving opening, and the supporting platform abuts against the reflective sheet, so that at least a portion of the reflective sheet forms an arc-shaped reflective region.

4. The backlight module of claim 3, wherein the bracket comprises:

the bracing piece, the bracing piece with the fixed plate deviates from the surface connection of backplate, prop up the protruding locating of supporting bench the lateral wall face of bracing piece, and be close to the bracing piece is kept away from the tip setting of backplate, prop up supporting bench and keep away from the side of bracing piece with the reflector plate butt, and make at least part formation of reflector plate the arc reflection of light district.

5. The backlight module of claim 4, wherein the end surface of the support rod facing away from the fixing plate is a plane or an arc surface.

6. The backlight module as claimed in claim 4, wherein the depth of the receiving cavity is defined as H1, the height of the supporting bar is defined as H2, the height of the supporting stand is defined as H3, and the distance between the side of the supporting stand away from the supporting bar and the supporting bar is defined as L, which satisfies the following condition: H1-H2 is more than or equal to 2mm and less than or equal to 4mm, and L is more than or equal to 3mm and less than or equal to 5 mm; h3 is more than or equal to 20mm and less than or equal to 30 mm.

7. The backlight module as claimed in claim 4, wherein the fixing plate, the supporting rods and the supporting platform are made of plastic material, and the fixing plate, the supporting rods and the supporting platform are integrated.

8. The backlight module as claimed in claim 4, wherein the support rods are made of a light-transmissive material.

9. The backlight module according to any of claims 4 to 8, wherein an adhesive layer is disposed between the fixing plate and the wall of the receiving groove;

10. A liquid crystal display device, characterized in that the liquid crystal display device comprises a liquid crystal display panel and a backlight module according to any one of claims 1 to 9.