CN210244021U - Narrow frame backlight unit - Google Patents

Abstract

The utility model discloses a narrow-frame backlight module, which cancels the middle frame of the backlight module by designing the side wall of a back plate into a plastic and bending part integrated injection molding mode, avoids generating a gap between the middle frame and a lower frame and reduces the frame of the backlight module; the problem of solution is, there is certain fit-up gap between backlight unit's the center among the prior art and the lower frame, and general every side has 0.1mm ~0.2 mm's clearance, and both sides add up and just have 0.2mm ~0.4 mm's clearance, and this is very big frame waste to narrow frame product.

Description

Narrow frame backlight unit

Technical Field

The utility model relates to a liquid crystal display technology field especially relates to a narrow frame backlight unit.

Background

Along with the requirement of the display module on the narrow frame, the backlight module also needs to be designed into the narrow frame.

At present, certain assembly gaps exist between the middle frame and the lower frame, each side generally has a gap of 0.1 mm-0.2 mm, the two sides are added to form a gap of 0.2-0.4 mm, and the narrow-frame product is wasted by a large frame.

SUMMERY OF THE UTILITY MODEL

The utility model provides a narrow frame backlight unit designs into the form that plastic and the integrative of kink were moulded plastics through the lateral wall with the backplate, cancels backlight unit's center, avoids producing the gap between center and the lower frame, reduces backlight unit's frame.

The above technical purpose of the utility model is realized through following technical scheme:

a narrow-frame backlight module comprises a back plate; the backlight module does not comprise a middle frame; the back plate comprises a bottom plate and a side wall; the side wall comprises a bent part extending upwards from the outer side of the bottom plate and plastic integrally injected with the bent part; and a shading layer is arranged on the side wall.

By adopting the structure, the side wall of the back plate is designed into a plastic and bending part integrated injection molding mode, the middle frame of the backlight module is cancelled, and a gap between the middle frame and the lower frame is avoided.

Further preferably, the top portion of the side wall is plastic; and a shading layer is arranged on the side wall.

By adopting the structure, the top end of the side wall is made of plastic which is relatively smooth, so that the light shielding layer can be favorably attached to the side wall; set up the light shield layer on the lateral wall, prevent that the edge of display module assembly from producing the light leak phenomenon.

Further optimization is that the reflecting sheet, the light guide plate and the optical film are arranged in a space defined by the bottom plate and the side wall of the back plate from bottom to top.

The light shielding layer comprises a light shielding layer body and an extension portion, the light shielding layer body is attached to the side wall, and the extension portion is located on the optical film.

With the above structure, the extending portion of the light shielding layer can play a role in fixing the optical film.

Preferably, the light shielding layer body has adhesiveness, and the extension portion has no adhesiveness.

By adopting the structure, the light shielding layer body has viscosity, and the light shielding layer is easy to be attached to the back plate; the extension part has no viscosity, so that the optical film is prevented from being stuck to cause wrinkles.

The light shading layer is made of dark double-sided adhesive or dark foam.

By adopting the structure, the dark double-sided adhesive tape or the foam prevents light from leaking from the edge of the backlight module.

It is further optimized that the plastic is a dark plastic.

By adopting the structure, light is prevented from leaking from the edge of the backlight module to generate bright lines.

Further preferably, the backlight module is a side-entry backlight module.

By adopting the structure, the backlight module is light and thin.

To sum up, the utility model discloses following beneficial effect has:

the utility model provides a narrow-frame backlight module, which cancels the middle frame of the backlight module by designing the side wall of the back plate into a plastic and bending part integrated injection molding mode, avoids generating a gap between the middle frame and the lower frame and reduces the frame of the backlight module; the problem of solution is, there is certain fit-up gap between backlight unit's the center among the prior art and the lower frame, and general every side has 0.1mm ~0.2 mm's clearance, and both sides add up and just have 0.2mm ~0.4 mm's clearance, and this is very big frame waste to narrow frame product.

Drawings

Fig. 1 is a schematic diagram of a backlight module in the prior art.

Fig. 2 is a schematic view of a narrow-bezel backlight module according to an embodiment of the present invention.

Reference numerals: 1' lower frame in the prior art; 1. a back plate; 110. a base plate; 120. a side wall; 121. a bending section; 122. plastic cement; 2. middle frame in the prior art; 3. a light guide plate; 4. an optical film group; 5. in the prior art, a gap is formed between a lower frame and a middle frame; 6. a light-shielding layer; 7. a reflective sheet; 8. a relief structure.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the following backlight module of the prior art and the narrow-frame backlight module of the present invention are further described in detail by combining the embodiments and the drawings.

The prior art is as follows: as shown in fig. 1, a certain assembly gap exists between a middle frame 2 and a lower frame 1' of a backlight module in the prior art, generally, a gap 5 of 0.1mm to 0.2mm exists on each side, and a gap of 0.2mm to 0.4mm exists when two sides are added together, which is a great frame waste for a narrow-frame backlight module product; the width of the edge of the middle frame 2 plus the gap 5 between the middle frame 2 and the lower frame 1' causes the width of the frame of the backlight module in the prior art to be A.

Embodiments of the present invention are described below.

Example 1

As shown in fig. 1-2, a narrow-bezel backlight module includes a back plate 1; the backlight module does not comprise a middle frame 2; the back plate 1 comprises a bottom plate 110 and a side wall 120; the side wall 120 includes a bent portion 121 extending upward from the outer side of the bottom plate 110 and a plastic 122 integrally molded with the bent portion 121. The side wall 120 of the back plate 1 is designed to be a plastic 122 and the bent portion 121 are integrally molded, so that the middle frame 2 of the backlight module in the prior art is eliminated, and the gap 5 between the middle frame 2 and the lower frame 1' in the prior art is avoided.

It can be understood that, in order not to affect other structures of the backlight module, the thickness of the plastic 122 may be the same as that of the middle frame 2 in the prior art, and under the condition of not changing other structures of the backlight module, the thickness of the middle frame 2 and the gap 5 between the middle frame 2 and the lower frame 1' may be omitted, so as to reduce the frame of the backlight module.

Preferably, the top portion of the sidewall 120 is plastic 122. The top of the sidewall 120 is made of plastic 122, and the plastic 122 is relatively smooth, which is beneficial to attaching the light shielding layer 6 on the sidewall 120. The shading layer 6 can block light, and the light leakage phenomenon at the edge of the backlight module is avoided.

Preferably, the plastic 122 is a dark plastic. Further, the plastic 122 is black plastic, which further prevents light from leaking from the edge of the backlight module and generates bright lines.

It should be noted that, the concave-convex structure 8 may be disposed on the combining surface of the bending portion 121 of the sidewall 120 and the plastic 122, so that the combining between the bending portion 121 and the plastic 122 is tight, the bending portion 121 forms a protrusion to be clamped into the groove of the plastic 122, the plastic 122 also forms a protrusion to be clamped into the groove of the bending portion 121, and the concave-convex structure 8 may be easily implemented in the process of integral injection molding.

Preferably, the reflective sheet 7, the light guide plate 3, and the optical film 4 are disposed from bottom to top in a space surrounded by the bottom plate 110 and the side wall 120 of the rear panel 1. The light shielding layer 6 further shields light to prevent the backlight module from generating bright lines, and also can fix the optical film 4.

Example 2

In this embodiment, the light shielding layer of the present invention is further described in addition to embodiment 1.

Preferably, the light shielding layer 6 includes a light shielding layer body 601 and an extending portion 602, the light shielding layer body 601 is attached to the sidewall 120, and the extending portion 602 is located above the optical film 4. The extended portion 602 of the light shielding layer can function to fix the optical film 4.

It should be noted that, in practical production, the width of the light shielding layer 6 is a, which is smaller than the frame width a of the backlight module in the prior art; the effect of reducing the frame of the backlight module is achieved.

Further, the light shielding layer body 601 has adhesiveness, and the extending portion 602 has no adhesiveness. The light shielding layer 601 has viscosity, and the light shielding layer 6 is easily attached to the back plate 1; the extension 602 is non-adhesive and prevents the optical film 4 from sticking to the optical film 4, which may cause the optical film 4 to wrinkle.

Preferably, the light shielding layer 6 is a dark double-sided adhesive or dark foam. Further, the light shielding layer 6 is black to prevent light from leaking from the edge of the backlight module.

Preferably, the backlight module is a side-in type backlight module. The side-in type backlight module is beneficial to realizing the lightness and thinness of the backlight module.

The utility model provides a narrow-frame backlight module, which cancels the middle frame of the backlight module by designing the side wall of the back plate into a plastic and bending part integrated injection molding mode, avoids generating a gap between the middle frame and the lower frame and reduces the frame of the backlight module; the problem of solution is, there is certain fit-up gap between backlight unit's the center among the prior art and the lower frame, and general every side has 0.1mm ~0.2 mm's clearance, and both sides add up and just have 0.2~0.4 mm's clearance, and this is very big frame extravagant to narrow frame product.

The above specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments and the embodiments without inventive contribution as required after reading the present specification, but all the modifications are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. A narrow-frame backlight module is characterized by comprising a back plate; the backlight module does not comprise a middle frame; the back plate comprises a bottom plate and a side wall; the side wall comprises a bending part and plastic, wherein the bending part extends upwards from the outer side of the bottom plate, and the plastic and the bending part are integrally molded.

2. The narrow-bezel backlight module as recited in claim 1, wherein the top portion of the sidewalls is plastic; and a shading layer is arranged on the side wall.

3. The narrow-bezel backlight module as claimed in claim 1, wherein a reflector, a light guide plate and an optical film are disposed from bottom to top in a space defined by the bottom plate and the sidewalls of the back plate.

4. The narrow-bezel backlight module as claimed in claim 2, wherein the light shielding layer comprises a light shielding layer body and an extension portion, the light shielding layer body is attached to the sidewall, and the extension portion is located on the optical film.

5. The narrow-bezel backlight module as claimed in claim 4, wherein the light-shielding layer body is adhesive and the extending portion is non-adhesive.

6. The narrow-bezel backlight module of claim 2, wherein the light-shielding layer is dark double-sided tape or dark foam.

7. The narrow-bezel backlight module of claim 1, wherein the plastic is a dark plastic.

8. The narrow bezel backlight module of claim 1, wherein the backlight module is a side-in backlight module.

Images