CN217521463U - Backlight module and display device - Google Patents

Abstract

The utility model relates to a show technical field, especially relate to a backlight module and display device. This backlight unit includes the light guide plate, the backplate, center and light source, light guide plate and light source all are located the common lamp shade that forms of backplate and center, one side of light guide plate is provided with the light source, the light-emitting direction of light source is towards the light guide plate, the relative one side of non-income light side or the non-income light side of light guide plate of backplate and light guide plate are pasted and are had fluorescence piece, and the backplate is not higher than the height of light guide plate at the height of the non-income light side of light guide plate, so that the quantum dot diaphragm of laminating above the light guide plate can the overlap joint be located the top of the backplate of non-income light side. This setting mode turns into white light with the blue light through fluorescence piece and quantum dot diaphragm, even the center makes the narrow limit design, also avoids backlight unit to appear leaking the problem of blue light. The display device meets the requirement of a narrow frame by applying the backlight module, avoids the blue edge phenomenon of the display device and improves the display effect of the display device.

Description

Backlight module and display device

Technical Field

The utility model relates to a show technical field, especially relate to a backlight unit and display device.

Background

Liquid crystal display devices have many advantages such as thin body, power saving, and no radiation, and are widely used, and generally include a liquid crystal display panel and a backlight module for providing a lateral backlight source for the liquid crystal display panel.

The current vehicle-mounted machine type generally adopts the blue light LED as the light source of the backlight module, but under the condition of adopting the blue light LED, when the middle frame of the backlight module is designed to be narrower, the problem of blue light leakage exists around the display device, and the display effect of the whole liquid crystal display device is reduced.

Therefore, it is desirable to provide a backlight module and a display device to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a backlight module and display device, under the condition that satisfies the narrow frame of display device, avoid backlight unit to appear leaking the problem of blue light, improve display device's display effect.

To achieve the purpose, the utility model adopts the following technical proposal:

a backlight module comprises a light guide plate, a back plate, a middle frame and a light source, wherein the light guide plate and the light source are both positioned in a lampshade formed by the back plate and the middle frame together;

the backlight module comprises a light guide plate, a back plate and a quantum dot film, wherein the back plate is attached with a fluorescent piece on one side opposite to the non-light-incident side of the light guide plate or the non-light-incident side of the light guide plate, and the height of the back plate on the non-light-incident side of the light guide plate is not higher than that of the light guide plate, so that the quantum dot film attached to the upper part of the light guide plate can be connected above the back plate on the non-light-incident side in an overlapping mode.

Preferably, the fluorescent member is attached to a side of the middle frame located above the quantum dot diaphragm and facing the quantum dot diaphragm and the back plate.

Preferably, the lower end surface of the fluorescent part attached to the middle frame can be attached to the upper end surface of the quantum dot membrane.

As a preferred scheme, the backlight module further comprises an optical diaphragm group arranged above the quantum dot diaphragm;

the center is in the non-income light side of light guide plate is including the first riser, first diaphragm, second riser and the second diaphragm that connect gradually, the first riser encloses to be established the outside of backplate, first diaphragm lid is established the top of quantum dot diaphragm, the second riser encloses to be established the outside of optics diaphragm group, second diaphragm lid is established the top of optics diaphragm group.

As preferred scheme, the optical film group towards one side extension of second riser has the overlap joint ear, seted up on the second riser and dodged the hole to avoid after the inflation overlap joint ear.

Preferably, the fluorescent member is printed fluorescent powder, an adhesive fluorescent tape or an adhesive fluorescent film.

A display device comprises a display panel and the backlight module, wherein the backlight module is configured to provide a side-in backlight source for the display panel.

Preferably, the display device further includes:

the foam rubber is clamped between the middle frame and the display panel and is configured to fixedly adhere the display panel and the middle frame.

Preferably, the middle frame includes a peripheral plate and a flat plate connected to each other at the light incident side of the light guide plate, the peripheral plate is arranged around the outer side of the back plate, the flat plate covers the quantum dot film, an attachment groove is formed in the flat plate in a recessed manner at a side far away from the display panel, and the foam adhesive is contained in the attachment groove.

Preferably, the thickness of the foam cotton rubber is 0.9 mm-1 mm.

The utility model has the advantages that:

the utility model provides a backlight module, through the non-income light side relative one side or the non-income light side subsides of light guide plate at backplate and light guide plate with fluorescence piece, and the backplate is not higher than the height of light guide plate in the non-income light side of light guide plate, so that the quantum dot diaphragm of laminating above the light guide plate can the overlap joint in the top that lies in the non-income light side's backplate, can turn into the blue light that sends from light source and light guide plate through fluorescence piece and quantum dot diaphragm white light, even make the narrow limit design with the center, the problem of leaking the blue light has also been avoided backlight module to appear.

The utility model provides a display device, through using above-mentioned backlight unit, under the condition that satisfies narrow frame, avoided display device blue limit phenomenon to appear, improved display device's display effect.

Drawings

Fig. 1 is a partial cross-sectional view of a display device at a light incident side according to a first embodiment of the present invention;

fig. 2 is a partial cross-sectional view of a display device at a non-incident side according to a first embodiment of the present invention;

fig. 3 is a partial cross-sectional view of a display device provided by the second embodiment of the present invention on a non-incident side.

In the figure:

100. a backlight module; 200. a display panel; 300. soaking cotton glue;

1. a light guide plate; 2. a back plate; 3. a light source; 4. a fluorescent member; 5. a quantum dot membrane; 6. a middle frame; 61. a first vertical plate; 62. a first transverse plate; 63. a second vertical plate; 631. avoiding holes; 64. a second transverse plate; 65. a peripheral plate; 66. a flat plate; 661. an attaching groove; 7. an optical film set; 71. the ears are lapped.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

Fig. 1 is a partial cross-sectional view of a display device at a light incident side according to a first embodiment of the present invention. As shown in fig. 1, the display device provided in the present embodiment includes a display panel 200 and a backlight module 100, wherein the backlight module 100 is used for providing a lateral backlight source for the display panel 200, so as to ensure normal display of the display device. Note that the display device provided in this embodiment may be a liquid crystal display device.

In addition, as shown in fig. 1, the display device provided in this embodiment further includes a foam 300, the foam 300 is sandwiched between the backlight module 100 and the display panel 200, and the foam 300 is used for adhering and fixing the display panel 200 and the backlight module 100. It should be noted that the foam rubber 300 not only has the function of adhesion and fixation, but also the foam rubber 300 has better buffer performance, so that the problem of light leakage of black pictures caused by the warping of the backlight module 100 or the warping of the display panel 200 can be alleviated, and the display effect of the whole display device can be ensured.

Referring to fig. 1, a specific structure of a backlight module 100 is described, as shown in fig. 1, the backlight module 100 provided in this embodiment includes a light guide plate 1, a back plate 2, a middle frame 6 and a light source 3, where the light guide plate 1 and the light source 3 are both located in a lamp shade formed by the back plate 2 and the middle frame 6 together, the light source 3 is fixed on an inner side wall of the back plate 2, the light source 3 is disposed on one side of the light guide plate 1, a light emitting direction of the light source 3 faces the light guide plate 1, the light source 3 is configured to provide light for a display device, and the light guide plate 1 is configured to convert a linear light source emitted by the light source 3 into a planar light source. In this embodiment, the foam rubber 300 is sandwiched between the middle frame 6 and the display panel 200 in the backlight module 100, so as to achieve the adhesion and fixation between the middle frame 6 and the display panel 200. Note that the back plate 2 is located inside the center frame 6.

In the present embodiment, the light source 3 is preferably, but not limited to, an LED lamp, and the LED lamp is a blue LED lamp. The white light is formed by mixing the blue light emitted by the LED lamp with the yellow phosphor, so that the backlight module 100 emits the white light.

Preferably, as shown in fig. 1, the middle frame 6 includes a peripheral plate 65 and a flat plate 66 connected to each other on the light incident side of the light guide plate 1, wherein the peripheral plate 65 is surrounded on the outer side of the back plate 2, the flat plate 66 is covered above the light guide plate 1, the back plate 2 and the light source 3, and the flat plate 66 is recessed towards the side away from the display panel 200 to form an attaching groove 661, and the foam adhesive 300 is accommodated in the attaching groove 661. Through with bubble celloidin 300 holding in attached groove 661, under the display device's of equal thickness the thickness of bubble celloidin 300 has further improved bubble celloidin 300's shock-absorbing capacity to alleviate backlight unit 100 warpage or the black picture light leak problem that display panel 200 warpage caused better. It should be noted that the thickness of the conventional foam rubber 300 is generally 0.35mm, and the thickness of the foam rubber 300 can reach 0.9mm to 1mm through the concave attaching groove 661. In addition, because the flat plate 66 of the middle frame 6 can be recessed towards the side far away from the display panel 200 above the light guide plate 1, the gap between the middle frame 6 and the back plate 2 and between the middle frame and the light guide plate 1 is greatly reduced, the blue light emitted from the light source 3 and the light guide plate 1 can be prevented from leaking from the gap, and the problem of blue light leakage at the edge of the display device is avoided.

In the prior art, in order to satisfy customer's demand, increase display device's competitiveness, it is usually narrower with the comparison of center 6 design for whole display device is more exquisite compact, when backlight unit 100's center 6 design is narrower, even dull and stereotyped 66 is sunken towards the one side of keeping away from display panel 200, display device's edge also can have the problem of leaking the blue light, thereby has reduced whole display device's display effect.

Fig. 2 is a partial cross-sectional view of a display device according to an embodiment of the present invention at a non-incident side. In order to solve the above problem, as shown in fig. 2, a fluorescent material 4 is attached to the non-light-incident side of the light guide plate 1, and the height of the back plate 2 on the non-light-incident side of the light guide plate 1 is not higher than the height of the light guide plate 1, so that the quantum dot film 5 attached above the light guide plate 1 can be overlapped above the back plate 2 on the non-light-incident side. This setting mode can be with the blue light that sends from light source 3 and light guide plate 1 through fluorescence piece 4 and quantum dot diaphragm 5 transform into white light, even make the narrow limit design with center 6, has also avoided backlight unit 100 to appear leaking the problem of blue light, has improved whole display device's display effect. The quantum dot membrane 5 may be a fluorescent film.

Specifically, in the present embodiment, the fluorescent member 4 may be printed phosphor, or may be an adhesive fluorescent tape or an adhesive fluorescent film. The embodiment does not specifically limit the specific form of the fluorescent member 4, as long as the emitted blue light can be converted into white light.

Preferably, as shown in fig. 1 and 2, since the quantum dot film 5 is attached above the light guide plate 1, the middle frame 6 surrounds the peripheries of the back plate 2 and the quantum dot film 5, and the fluorescent member 4 is also attached to the side of the middle frame 6 above the quantum dot film 5 facing the quantum dot film 5 and the back plate 2, so that the emitted blue light is irradiated onto the fluorescent member 4 and then converted into white light, and further the blue light is prevented from leaking out of the gap between the middle frame 6 and the back plate 2.

Further, as shown in fig. 1 and 2, the lower end surface of the fluorescent member 4 attached to the middle frame 6 can be attached to the upper end surface of the quantum dot membrane 5, so that the fluorescent member 4 makes up the gap between the middle frame 6 and the back plate 2 and the quantum dot membrane 5, and further prevents the blue light from leaking outside.

In addition, as shown in fig. 1 and fig. 2, the backlight module 100 further includes an optical film group 7, the optical film group 7 is disposed above the quantum dot film 5, and after the quantum dot film 5 converts the surface light source emitted from the light guide plate 1 into white light, the optical film group 7 can diffuse the surface light source emitted from the light guide plate 1, so as to ensure that the display panel 200 displays more clearly.

In this embodiment, on the light incident side of the light guide plate 1, as shown in fig. 1, the fluorescent member 4 is attached to the bottom wall of the attaching groove 661 of the flat plate 66, the bottom wall of the attaching groove 661 attached with the fluorescent member 4 abuts against the quantum dot film 5, and the flat plate 66 on the side facing the optical film group 7 after the flat plate 66 is recessed abuts against the edge of the optical film group 7, so that the bezel 6 abuts against and fixes the relevant device on the light incident side.

Preferably, on the non-light-incident side of the light guide plate 1, as shown in fig. 2, the middle frame 6 includes a first vertical plate 61, a first horizontal plate 62, a second vertical plate 63, and a second horizontal plate 64, which are connected in sequence, on the non-light-incident side of the light guide plate 1, wherein the first vertical plate 61 is disposed around the outer side of the back plate 2, the first horizontal plate 62 is disposed above the quantum dot film 5, the second vertical plate 63 is disposed around the outer side of the optical film group 7, and the second horizontal plate 64 is disposed above the optical film group 7. This setting mode makes center 6 carry out twice design of bending on the non-income light side of light guide plate 1, has not only guaranteed that center 6 and quantum dot diaphragm 5 and optical diaphragm group 7 overlap joint are fixed more firm, has also reduced the clearance between center 6 and backplate 2 and the light guide plate 1, further prevents leaking outward of blue light. Correspondingly, the fluorescent part 4 is attached to the first transverse plate 62, the first transverse plate 62 attached with the fluorescent part 4 abuts against the quantum dot film 5, and the second transverse plate 64 abuts against the edge of the optical film group 7, so that the middle frame 6 abuts against and fixes the relevant device on the non-light-incident side.

In other embodiments, the bending process of the intermediate frame 6 may not be performed, and the fluorescent material 4 may be attached to the intermediate frame 6 on the side facing the quantum dot film 5.

In addition, as shown in fig. 2, in the process that the foam adhesive 300 is used for pasting and fixing the middle frame 6 and the display panel 200 at the non-incident side of the light guide plate 1, the foam adhesive 300 is arranged between the first transverse plate 62 and the display panel 200, and the first transverse plate 62 is lower than the second transverse plate 64, so that the distance from the first transverse plate 62 to the display panel 200 is greatly increased, the thickness of the foam adhesive 300 can be increased, the buffering performance of the foam adhesive 300 is improved, and the problem of light leakage of a black picture caused by the warping of the backlight module 100 or the warping of the display panel 200 is better solved. Therefore, on the non-incident side of the light guide plate 1, the two-fold design of the middle frame 6 can also ensure that the thickness of the foam rubber 300 reaches 0.9mm to 1 mm.

In the present embodiment, as shown in fig. 2, the optical film group 7 has an engaging lug 71 extending toward one side of the second vertical plate 63, and the second vertical plate 63 has an avoiding hole 631, where the avoiding hole 631 is used for avoiding the expanded engaging lug 71. Through setting up overlap joint ear 71, increased the area of pressing at center 6 and optical diaphragm group 7 edge, improved the reliability of center 6 fixed optical diaphragm group 7, prevent that optical diaphragm group 7 from pushing away on second diaphragm 64 at expend with heat and contract with cold's in-process, breaking away from pressing fixedly of center 6. In addition, the avoidance hole 631 is arranged to avoid the expanded lap joint ear 71, so that the driving force of the optical diaphragm group 7 on the middle frame 6 can be further avoided, and the stability and reliability of the optical diaphragm group 7 fixed by the middle frame 6 are improved.

Example two

Fig. 3 is a partial cross-sectional view of a display device according to a second embodiment of the present invention at a non-incident side. The specific structure of the backlight module 100 provided in this embodiment is substantially the same as that of the first embodiment, and the difference between the backlight module 100 provided in this embodiment and the first embodiment is as follows: as shown in fig. 3, the fluorescent member 4 is not attached to the non-incident side of the light guide plate 1, and the fluorescent member 4 is attached to the side of the back plate 2 opposite to the non-incident side of the light guide plate 1, which can also avoid the problem of blue light leakage of the backlight module 100, thereby improving the display effect of the entire display device.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit 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. A backlight module comprises a light guide plate (1), a back plate (2), a middle frame (6) and a light source (3), wherein the light guide plate (1) and the light source (3) are both positioned in a lampshade formed by the back plate (2) and the middle frame (6), the light source (3) is arranged on one side of the light guide plate (1), and the light emitting direction of the light source (3) faces the light guide plate (1);

the backlight module is characterized in that a fluorescent piece (4) is attached to one side, opposite to the non-light-incident side of the light guide plate (1), of the back plate (2) or the non-light-incident side of the light guide plate (1), and the height of the back plate (2) on the non-light-incident side of the light guide plate (1) is not higher than that of the light guide plate (1), so that a quantum dot membrane (5) attached to the upper portion of the light guide plate (1) can be connected to the upper portion of the back plate (2) on the non-light-incident side in an overlapping mode.

2. The backlight module according to claim 1, wherein the side of the middle frame (6) above the quantum dot film (5) facing the quantum dot film (5) and the back plate (2) is also attached with the fluorescent member (4).

3. The backlight module according to claim 2, wherein the lower end surface of the fluorescent member (4) attached to the middle frame (6) can be attached to the upper end surface of the quantum dot film (5).

4. The backlight module according to any of claims 1-3, further comprising an optical film group (7) disposed above the quantum dot film (5);

center (6) are in the non-income light side of light guide plate (1) is including first riser (61), first diaphragm (62), second riser (63) and second diaphragm (64) that connect gradually, first riser (61) enclose to be established the outside of backplate (2), first diaphragm (62) lid is established the top of quantum dot diaphragm (5), second riser (63) enclose to be established the outside of optical diaphragm group (7), second diaphragm (64) lid is established the top of optical diaphragm group (7).

5. The backlight module as claimed in claim 4, wherein the optical film group (7) has overlapping ears (71) extending toward one side of the second riser (63), and the second riser (63) has an avoiding hole (631) for avoiding the overlapping ears (71) after expansion.

6. The backlight module according to any of claims 1 to 3, wherein the fluorescent member (4) is a printed phosphor, an adhesive fluorescent tape or an adhesive fluorescent film.

7. A display device comprising a display panel (200) and the backlight module according to any of claims 1-6, wherein the backlight module is configured to provide a side-in backlight for the display panel (200).

8. The display device according to claim 7, further comprising:

the foam rubber (300) is clamped between the middle frame (6) and the display panel (200) and is configured to fixedly adhere the display panel (200) to the middle frame (6).

9. The display device according to claim 8, wherein the middle frame (6) comprises a peripheral plate (65) and a flat plate (66) connected to each other on the light incident side of the light guide plate (1), the peripheral plate (65) is surrounded on the outer side of the back plate (2), the flat plate (66) is covered above the quantum dot film (5), and an attaching groove (661) is formed in the flat plate (66) by recessing towards the side away from the display panel (200), and the foam adhesive (300) is accommodated in the attaching groove (661).

10. The display device according to claim 9, wherein the foam (300) has a thickness of 0.9mm to 1 mm.

Images