CN114326205A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN114326205A CN114326205A CN202111486865.XA CN202111486865A CN114326205A CN 114326205 A CN114326205 A CN 114326205A CN 202111486865 A CN202111486865 A CN 202111486865A CN 114326205 A CN114326205 A CN 114326205A
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- 239000002096 quantum dot Substances 0.000 claims abstract description 49
- 238000005452 bending Methods 0.000 claims description 10
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- 230000000694 effects Effects 0.000 abstract description 11
- 239000010408 film Substances 0.000 description 103
- 239000012788 optical film Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The invention is suitable for the technical field of display, and provides a backlight module and a display device, wherein the backlight module comprises a light guide plate, a light source assembly, a quantum dot film, a reflector plate and a blue light conversion structure, the light source assembly is arranged at the light inlet side of the light guide plate, the quantum dot film is arranged on the light outlet side of the light guide plate, the reflector plate is arranged at one side of the light guide plate, which is far away from the quantum dot film, the blue light conversion structure is arranged between the light guide plate and the reflector plate, and the blue light conversion structure is used for converting blue light leaked from a diffuse reflection surface of the light guide plate into white light, and/or the blue light conversion structure is arranged at the light outlet side of the light guide plate and is used for converting the blue light emitted from the edge of the light guide plate into white light; the display device comprises a backlight module. The backlight module provided by the invention enables the light emitted from the edge of the backlight module to be white, and the display effect is better.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a backlight module.
Background
As user demand continues to increase, more and more users seek high color gamut displays. Wherein, present LCD's backlight unit is divided into according to the backlight setting mode difference: direct type backlight unit and side income formula backlight unit two categories adopt blue light LED as the backlight can effectively promote backlight unit's luminance, turn into white light with the blue light through the quantum dot membrane, can effectively promote the proportion of the colour gamut that shows the colour from 72% to 110%, have brought better visual effect for the consumer, consequently adopt blue light LED as backlight unit can become the trade trend gradually.
In the side-in backlight module of the related art, the quantum dot film does not completely cover the light guide plate, and the blue light is directly emitted from the edge of the light guide plate, so that a blue-emitting area with a certain width exists at the periphery of the backlight module of the blue light LED plus quantum dot film technology.
Disclosure of Invention
The embodiment of the invention aims to provide a backlight module and a display device, and aims to solve the technical problem that a blue-emitting area exists at the periphery of the conventional backlight module with a blue LED and a quantum dot film.
In order to achieve the purpose, the invention adopts the technical scheme that: the backlight module comprises a light guide plate, a light source assembly, a quantum dot film and a reflector plate, wherein the light source assembly is arranged on the light inlet side of the light guide plate, the quantum dot film is arranged on the light outlet side of the light guide plate, and the reflector plate is arranged on one side of the light guide plate, which is far away from the quantum dot film; the method is characterized in that: the light guide plate further includes:
the blue light conversion structure is arranged between the light guide plate and the reflector plate and is used for converting blue light leaked from the diffuse reflection surface of the light guide plate into white light; and/or the blue light conversion structure is arranged on the light emitting side of the light guide plate and is used for converting the blue light emitted from the edge of the light guide plate into white.
Optionally, the blue light conversion structure comprises:
a first conversion film disposed between the light guide plate and the reflective sheet and disposed close to the light source assembly;
the second conversion film is arranged at the edge of the light-emitting surface of the light guide plate and is arranged to avoid the first conversion film; and
and the third conversion film is arranged on the side edge of the light guide plate, which avoids the light source component, and is opposite to the light source component.
Optionally, the first conversion film comprises:
a straight portion disposed adjacent to the light source assembly; and
a serrated portion connected with a side of the straight portion facing away from the light source assembly.
Optionally, the sawtooth portion includes a plurality of protrusions and a plurality of recesses, and a recess is formed between two adjacent protrusions to form a structure in which the protrusions and the recesses are alternately arranged.
Optionally, the protrusions are semi-elliptical, and the height of the protrusions is 5-9 mm.
Optionally, the bottom of the recess is a plane, and the length of the plane is 2-5 mm.
Optionally, the height of the straight portion is 5-8 mm.
Optionally, the second conversion film comprises a first edge, a second edge and a third edge which are sequentially bent, the second edge is arranged opposite to the light source assembly, and two ends of the second edge are respectively connected with the first edge and the third edge;
the first edge, the second edge and the third edge are of split structures; or the first edge, the second edge and the third edge are of an integrally formed structure.
Optionally, the third conversion film comprises:
the body part is arranged on the side edge of the light guide plate opposite to the light source component; and
the first bending part is bent and extended from one end of the body part towards the direction of the light source component; and
and the second bending part is bent and extended from the other end of the body part towards the direction of the light source component.
The invention also provides a display device which comprises a display assembly and the backlight module, wherein the display assembly is arranged on the light-emitting surface of the quantum dot film.
The backlight module provided by the invention has the beneficial effects that: the blue light conversion structure is arranged between the light guide plate and the reflector plate, and can convert blue light leaked from the diffuse reflection surface of the light guide plate into white light, and the white light is reflected into the light guide plate through the reflector plate to be emitted; and/or, set up blue light conversion structure in the light-emitting side of light guide plate, this blue light conversion structure can convert the marginal blue light that jets out of light guide plate into white light, can make the light that jets out from backlight unit's edge department promptly be white through foretell mode, has solved the peripheral technical problem that has the regional blue region of sending out of backlight unit of current blue light LED plus quantum dot membrane, and the display effect is better.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic perspective view of a display device according to an embodiment of the present invention;
fig. 2 is an exploded view of a display device 1 according to an embodiment of the present invention;
fig. 3 is an exploded view of a display device according to an embodiment of the present invention, schematically illustrated in fig. 2;
FIG. 4 is a partially enlarged view of the portion A shown in FIG. 3;
FIG. 5 is an exploded view of a display device according to an embodiment of the present invention, schematically illustrated in FIG. 3;
fig. 6 is a partially enlarged structural view of a portion B in fig. 5;
FIG. 7 is an exploded view of a display device according to an embodiment of the present invention, schematically illustrated in FIG. 4;
FIG. 8 is an enlarged partial view of the portion C of FIG. 7;
FIG. 9 is an exploded view of a display device according to an embodiment of the present invention, schematically illustrated in FIG. 5;
FIG. 10 is an enlarged view of a portion D of FIG. 9;
FIG. 11 is a schematic diagram of a partial cross-sectional structure of a display device according to an embodiment of the present invention 1;
FIG. 12 is a schematic partial cross-sectional view of a display device according to an embodiment of the present invention, shown in FIG. 2;
FIG. 13 is a schematic partial cross-sectional view of a display device according to an embodiment of the present invention, schematically illustrated in FIG. 3;
FIG. 14 is a partial perspective view of a first conversion film used in an embodiment of the present invention;
FIG. 15 is a schematic top view of a first conversion film used in an embodiment of the present invention;
FIG. 16 is a schematic top view of a second switching film used in the embodiment of the present invention;
fig. 17 is a schematic perspective view of a third conversion film used in the embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-a backlight module; 11-a light guide plate; 12-a light source assembly; 121-a light source plate; 122-a light source; 13-a quantum dot film; 14-a reflective sheet; 15-blue light conversion structures; 151-first conversion film; 1511-straight portion; 1512-serrations; 1513-projection; 1514-recess; 152-a second switching film; 1521-first edge; 1522-second edge; 1523-third edge; 153-third switching film; 1531-a body portion; 1532-a first bend; 1533-a second bend;
20-a display component; 21-a display panel; 22-an optical membrane; 23-a brightness enhancement film;
30-a frame assembly; 31-lower border; 311-a first connection; 312 — a first cuff portion; 32-lower middle frame; 321-a second connecting portion; 322-a second flanging part; 323-an abutment; 33-upper border; 331-a shielding portion; 332-a plug-in part; 34-a back plate; 35-a plug-in unit;
h1-height of projection; h2-length of plane; h3 — height of straight portion; w1-width of the light-emitting surface of the second conversion film covering the light guide plate; w2-width of the third conversion film covering the side of the light guide plate.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and fig. 2, a backlight module 10 according to an embodiment of the invention will now be described. The backlight module 10 includes a light guide plate 11, a light source assembly 12, a quantum dot film 13, and a reflective sheet 14, and each of these components will be described in detail below.
Specifically, with reference to fig. 3 and 4, the light source assembly 12 is disposed on the light incident side of the light guide plate 11, the quantum dot film 13 is disposed on the light emergent side of the light guide plate 11, and the reflector 14 is disposed on a side of the light guide plate 11 away from the quantum dot film 13; the light emitting angle of the light source assembly 12 is generally 120 degrees, blue light emitted by the light source assembly 12 enters the light guide plate 11 through the light entrance side of the light guide plate 11, is reflected to the light exit surface of the light guide plate 11 through the diffuse reflection surface of the light guide plate 11 and enters the quantum dot film 13, the quantum dot film 13 contains red and green quantum dots, the blue light is excited to generate red light and green light, and is compounded with the blue light emitted by the light source assembly 12 to form white light, and the LCD color gamut value of the quantum dot film 13 can reach 110%; another part of the blue light emitted from the light source module 12 is irradiated onto the reflective sheet 14, and the reflective sheet 14 can further reflect the light exposed from the bottom surface of the light guide plate 11 into the light guide plate 11 for emission.
Further, referring to fig. 12, the light guide plate 11 further includes a blue light conversion structure 15, the blue light conversion structure 15 is disposed between the light guide plate 11 and the reflector 14, the blue light conversion structure 15 is configured to convert blue light leaking from the diffuse reflection surface of the light guide plate 11 into white light, and the white light is reflected into the light guide plate 11 through the reflector 14 to be emitted, so that the light emitted from the edge of the backlight module 10 is white; alternatively, the blue light conversion structure 15 is disposed on the light emitting side of the light guide plate 11 and close to the light source assembly 12, and the blue light conversion structure 15 is used for converting the blue light emitted from the edge of the light guide plate 11 into white light, so that the light emitted from the edge of the backlight module 10 is white.
Of course, the blue light conversion structure 15 is disposed between the light guide plate 11 and the reflective sheet 14 and on the light exit side of the light guide plate 11, so that the light emitted from the edge of the backlight module 10 is white.
It should be noted that the light source assembly 12 includes a light source plate 121 and a light source 122, the light source 122 is disposed on one side of the light source plate 121 facing the light guide plate 11, and when the light source 122 emits light, a certain amount of heat is emitted to avoid that the quantum dot film 13 is scrapped because the quantum dot film 13 is too close to the backlight module 10, and therefore, the quantum dot film 13 in the related art does not completely cover the light guide plate 11, so that blue light is directly emitted from the edge of the light guide plate 11.
In the backlight module 10 of the present embodiment, the blue light conversion structure 15 is disposed between the light guide plate 11 and the reflective sheet 14, and the blue light conversion structure 15 can convert light leaking from the diffuse reflection surface of the light guide plate 11 into white light, and the white light is reflected into the light guide plate 11 by the reflective sheet 14 to be emitted; and/or, set up blue light conversion structure 15 in the light-emitting side of light guide plate 11, this blue light conversion structure 15 can convert the light that jets out at the edge of light guide plate 11 into white light, can make the light that jets out from the edge of backlight unit 10 through foretell mode promptly be white, has solved the peripheral technical problem that has the area of sending blue of present blue light LED plus quantum dot film's backlight unit, and the display effect is better.
It should be noted that the blue light conversion structure 15 includes a light conversion material, the light conversion material may include quantum dots and/or phosphor, the phosphor has more stable properties than the quantum dots, and the performance of the blue light conversion structure 15 is more stable than the quantum dot film 13 and is not affected by high temperature.
In an embodiment of the invention, referring to fig. 2, when the blue light conversion structure 15 is disposed between the light guide plate 11 and the reflective sheet 14 and on the light emitting side of the light guide plate 11, the blue light conversion structure 15 includes a first conversion film 151, a second conversion film 152 and a third conversion film 153, wherein the first conversion film 151 is disposed between the light guide plate 11 and the reflective sheet 14, the first conversion film 151 is disposed near the light source assembly 12, the second conversion film 152 is disposed at the edge of the light emitting surface of the light guide plate 11 and disposed away from the first conversion film 151, and the third conversion film 153 is disposed at the side of the light guide plate 11 away from the light source assembly 12 and disposed opposite to the light source assembly 12.
Further, the first conversion film 151 is disposed on the light emitting surface of the light guide plate 11, instead of disposing the first conversion film 151 on the quantum dot film 13, since the quantum dot film 13 has a high requirement for cleanliness, if the first conversion film 151 is disposed on the quantum dot film 13, the quantum dot film 13 is easily discarded.
It should be noted that, the first conversion film 151 is disposed between the light guide plate 11 and the reflection sheet 14, and the first conversion film 151 converts light and then reflects the light into the light guide plate 11 through the reflection sheet 14, so that the light emitted from the edge of the light guide plate 11 is not too bright while converting blue light, and the edge of the light guide plate 11 appears bright.
In another embodiment of the present invention, referring to fig. 14 to 15, the first conversion film 151 is a blue conversion film tiled on the light guide plate 11, the blue conversion film includes a flat portion 1511 and a sawtooth portion 1512, the flat portion 1511 is disposed near the light source module 12, the sawtooth portion 1512 is connected to a side portion of the flat portion 1511 away from the light source module 12, and a side portion of the blue conversion film away from the light source module 12 is disposed as the sawtooth portion 1512, so that light can be homogenized, and bright edges at edges of the backlight module 10 can be avoided.
Specifically, in this embodiment, the backlight module 10 has a display area and a non-display area, because the quantum dot film 13 cannot completely cover the light guide plate 11, thereby making blue light appear at the boundary between the display area and the non-display area of the backlight module 10, and in this embodiment, the side of the blue light conversion film departing from the light source assembly 12 is provided with the sawtooth portion 1512, that is, the sawtooth portion 1512 is close to the display area, the sawtooth portion 1512 can uniformly disperse light, thereby uniformly color when making light entering the light guide plate 11, thereby making the edge brightness of the backlight module 10 uniform, and further avoiding the occurrence of bright edges at the edge of the backlight module 10.
Further, the sawtooth part 1512 includes a plurality of protrusions 1513 and a plurality of recesses 1514, and the recesses 1514 are formed between two adjacent protrusions 1513, forming a structure in which the protrusions 1513 and the recesses 1514 are alternately arranged.
Specifically, two adjacent protrusions 1513 are a first protrusion and a second protrusion respectively, two adjacent recesses 1514 are a first recess and a second recess respectively, a first recess is arranged between the first protrusion and the second protrusion, the second recess is connected with the second protrusion and is separated from the first recess, the saw teeth portion 1512 is arranged in a structure in which the protrusions 1513 and the recesses 1514 are alternately arranged, that is, the saw teeth portion 1512 is arranged in a structure in which the recesses are not completely recessed, the strength is stable, and the protrusions 1513 and the recesses 1514 are matched with each other, so that the display effect is good.
In one embodiment of the present invention, referring to fig. 15, the protrusion 1513 is a semi-elliptical shape, the height of the elliptical protrusion 1513 is 5-9mm, the height of the protrusion 1513 is half of the major axis dimension of the elliptical shape, and in a specific application, the height of the protrusion 1513 is 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8mm, 8.1mm, 8.2mm, 8.3mm, 8.4mm, 8.5mm, 8.6mm, 8.7mm, 8.8mm, 8.9mm, 9mm, which can be selected according to specific requirements, avoiding poor height conversion effect, thereby leading to the condition of leaking blue light and simultaneously avoiding the condition of excessive white light caused by overlarge height.
Of course, in other embodiments, the shape of the protrusion 1513 may be a semi-circular, square, or polygonal structure.
In one embodiment of the present invention, referring to fig. 15, the bottom of the recess 1514 is a flat surface having a length of 2-5mm, i.e., a distance between two adjacent protrusions 1513 is 2-5mm, and in a specific application, the flat surface has a length of 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm, 5mm, which can be selected according to specific requirements to avoid the conversion effect of the length, thereby avoiding the excessive light leakage which may cause excessive light leakage and also cause excessive blue light leakage.
In an embodiment of the present invention, referring to fig. 15, the height of the straight portion 1511 is 5-8mm, and in a specific application, the height of the straight portion 1511 is 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8mm, which can be selected according to specific requirements, so as to avoid a situation that the blue light conversion effect is not good, thereby causing leakage, and also avoid waste of excessive height, thereby causing technical problems of high cost.
In another embodiment of the present invention, referring to fig. 7 and 8, after the quantum dot film 13 is cut, the quantum dots are directly exposed and contacted with moisture and oxygen, so that the blue light directly penetrates through the edge of the quantum dot film 13, and therefore a blue-emitting region with a certain width still exists around the backlight module 10, and therefore, the backlight module 10 further includes a second conversion film 152, the second conversion film 152 is disposed at the edge of the light-emitting surface of the light guide plate 11 and is disposed to avoid the first conversion film 151, and the light penetrating through the edge of the quantum dot film 13 can be converted into white light through the second conversion film 152.
Specifically, further referring to fig. 16, in this embodiment, the second conversion film 152 includes a first edge 1521, a second edge 1522 and a third edge 1523 that are bent in sequence, the second edge 1522 is disposed opposite to the light source assembly 12, and two ends of the second edge 1522 are connected to the first edge 1521 and the third edge 1523 respectively, wherein the first edge 1521, the second edge 1522 and the third edge 1523 are split structures, so that the first edge 1521, the second edge 1522 and the third edge 1523 are conveniently and sequentially adhered to the light emitting surface of the light guide plate 11.
Of course, in other embodiments, the first edge 1521, the second edge 1522 and the third edge 1523 are integrally formed, so that the processing and the forming are facilitated, and the first edge 1521, the second edge 1522 and the third edge 1523 are integrally formed, so that the connection between the first edge 1521 and the second edge 1522 is relatively stable, and the connection between the second edge 1522 and the third edge 1523 is relatively stable.
It should be noted that the first edge 1521, the second edge 1522, and the third edge 1523 of the second conversion film 152 are all regular shapes, which is convenient for processing and forming, and the width W1 of the second conversion film 152 covering the light emitting surface of the light guide plate 11 is 2-4mm, which can convert blue light into white light while saving cost, in a specific application, the width of the light emitting surface W1 of the second conversion film 152 covering the light guide plate 11 is 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, which can be selected according to specific requirements, thereby avoiding the too narrow conversion effect, thereby avoiding the problem of blue light leakage, and the problem of too high blue light cost.
In an embodiment of the invention, referring to fig. 9 and 10, in order to further prevent the blue light from leaking from the edge of the light guide plate 11, the backlight module 10 further includes a third conversion film 153, where the third conversion film 153 is disposed on the side of the light guide plate 11 away from the light source assembly 12, and is capable of converting the light leaking from the side of the light guide plate 11 into white light to prevent a blue edge from occurring, so that the blue light can be prevented from leaking from the side of the light guide plate 11, and is incident on the reflector plate 14, and is reflected by the reflector plate 14 to be emitted from the light emitting surface of the light guide plate 11.
Specifically, in the embodiment, with reference to fig. 11, 13 and 17, the third conversion film 153 includes a main body portion 1531, a first bending portion 1532 and a second bending portion 1533, wherein the main body portion 1531 is disposed on a side of the light guide plate 11 opposite to the light source assembly 12, the first bending portion 1532 is bent and extended from one end of the main body portion 1531 toward the light source assembly 12, and the second bending portion 1533 is bent and extended from the other end of the main body portion 1531
The light source assembly 12 is bent and extended, and the surface of the first bending portion 1532 facing the light guide plate 11 and the surface of the second bending portion 1533 facing the light guide plate 11 are both provided with an adhesive, so that the third conversion film 153 can be conveniently adhered to the light guide plate 11.
It should be noted that the body portion 1531, the first bent portion 1532, and the second bent portion 1533 of the third conversion film 153 are all regular shapes, and are convenient for forming, and the width of the third conversion film 153 covering the side of the light guide plate 11 is 1-3mm, which can convert blue light into white light while saving cost, in a specific application, the width W2 of the third conversion film 153 covering the side of the light guide plate 11 is 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, which can be selected according to specific requirements, which avoids the problem of poor conversion effect due to too narrow width, thereby avoiding the problem of blue light leakage, and also avoiding too high width and waste of blue light.
It can be understood that the first conversion film 151, the second conversion film 152 and the third conversion film 153 are made of the same material and have the same thickness, and the lengths of the first conversion film 151, the second conversion film 152 and the third conversion film 153 are mainly adapted to the size of the light guide plate 11, wherein the thicknesses of the first conversion film 151, the second conversion film 152 and the third conversion film 153 are all 0.1-1.5mm, in a specific application, the thicknesses of the first conversion film 151, the second conversion film 152 and the third conversion film 153 are all 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm and 1.1mm, which can be selected according to specific requirements, so as to avoid the thicknesses being too thin, inconvenient to process and easy to be broken, and also avoid the thicknesses being too thick to occupy the space of the whole display device and resulting in too thick thickness of the whole display device.
Referring to fig. 1 and 2, the present invention further provides a display device, which includes a display element 20 and the backlight module 10 in any of the embodiments, wherein the display element 20 is disposed on the light emitting surface of the quantum dot film 13.
According to the display device provided by the invention, the backlight module 10 is adopted, the blue light conversion structure 15 is arranged between the light guide plate 11 and the reflector plate 14, and the blue light conversion structure 15 can convert light rays leaked from a diffuse reflection surface of the light guide plate 11 into white light and reflect the white light into the light guide plate 11 through the reflector plate 14 to be emitted; and/or, set up blue light conversion structure 15 in the light-emitting side of light guide plate 11, this blue light conversion structure 15 can convert the light that jets out at the edge of light guide plate 11 into white light, can make the light that jets out from the edge of backlight unit 10 through foretell mode promptly be white, has solved the peripheral technical problem that has the area of sending blue of present blue light LED plus quantum dot film's backlight unit, and the display effect is better.
Specifically, the display assembly 20 includes a display panel 21, an optical film 22, and a brightness enhancement film 23 sequentially disposed from a direction away from the quantum dot film 13 to a direction away from the quantum dot film 13, wherein the brightness enhancement film 23 is disposed on the quantum dot film 13.
In an embodiment of the present invention, referring to fig. 5 and 6, the display device further includes a frame assembly 30, the frame assembly 30 includes a back plate 34, a lower middle frame 32, an upper side frame 33, and a lower side frame 31, and the components of the frame assembly 30 are described in detail below.
Specifically, back plate 34 has four sides;
the lower middle frame 32 is disposed on one side of the back plate 34, and supports the display panel 21 on the front surface of the back plate 34;
the upper frame 33 is connected to the other three adjacent side surfaces of the back plate 34, the upper frame 33 includes a shielding portion 331 and an inserting portion 332 extending from the inner side of the shielding portion 331, the shielding portion 331 is disposed on the side surface of the back plate 34, the inserting portion 332 is disposed between the back plate 34 and the display panel 21 and is used for supporting the display panel 21 on the front surface of the back plate 34, and the inserting portion 332 is overlapped on the lower middle frame 32 and detachably connected to the lower middle frame 32 through fasteners such as screws;
the lower frame 31 is disposed on a side of the lower middle frame 32 away from the back plate 34, the lower frame 31 includes a first connection portion 311 and a first flanging portion 312 bent and extended from one side of the first connection portion 311, the first connection portion 311 is detachably connected to a side surface of the back plate 34 through a fastener such as a screw, and the first flanging portion 312 is covered on the non-display area of the display panel 21 and is close to the display area of the display panel 21;
through setting up the frame assembly 30 that comprises backplate 34, lower center 32, last frame 33 and lower frame 31 to can protect display module 20, avoid influencing display module 20's life-span under the external force impact.
In an embodiment of the invention, referring to fig. 12, the lower middle frame 32 includes a second connecting portion 321, a second flanging portion 322, and a contact portion 323, the second connecting portion 321 is connected to one side of the back plate 34 and detachably connected to the plug portion 332 of the lower middle frame 32, the second flanging portion 322 is bent and extended from one side of the second connecting portion 321 toward the display module 20, the second flanging portion 322 is used for supporting the display panel 21 on the front surface of the back plate 34, the contact portion 323 is extended from one side of the second flanging portion 322 toward the light guide plate 11, the contact portion 323 contacts the light guide plate 11, and the quantum dot film 13 is limited in an area surrounded by the contact portion 323 and the second flanging portion 322.
Further, with reference to fig. 7 and 8, the frame assembly 30 further includes a plug connector 35, the plug connector 35 is connected to a side surface of the back plate 34 that avoids the lower middle frame 32, and along the thickness direction of the display panel 21, the quantum dot film 13, the brightness enhancement film 23 and the optical film 22 are respectively provided with a plug hole, and the plug connector 35 sequentially passes through the plug hole on the quantum dot film 13, the plug hole on the brightness enhancement film 23 and the plug hole on the optical film 22, so as to connect the quantum dot film 13, the brightness enhancement film 23 and the optical film 22 together.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A backlight module comprises a light guide plate, a light source assembly, a quantum dot film and a reflector plate, wherein the light source assembly is arranged on the light inlet side of the light guide plate, the quantum dot film is arranged on the light outlet side of the light guide plate, and the reflector plate is arranged on one side of the light guide plate, which is far away from the quantum dot film; the method is characterized in that: the light guide plate further includes:
the blue light conversion structure is arranged between the light guide plate and the reflector plate and is used for converting blue light leaked from the diffuse reflection surface of the light guide plate into white light; and/or the blue light conversion structure is arranged on the light emitting side of the light guide plate and is used for converting the blue light emitted from the edge of the light guide plate into white.
2. The backlight module of claim 1, wherein: the blue light conversion structure includes:
a first conversion film disposed between the light guide plate and the reflective sheet and disposed close to the light source assembly;
the second conversion film is arranged at the edge of the light-emitting surface of the light guide plate and is arranged to avoid the first conversion film; and
and the third conversion film is arranged on the side edge of the light guide plate, which avoids the light source component, and is opposite to the light source component.
3. The backlight module of claim 2, wherein: the first conversion film includes:
a straight portion disposed adjacent to the light source assembly; and
a serrated portion connected with a side of the straight portion facing away from the light source assembly.
4. The backlight module of claim 3, wherein: the sawtooth part comprises a plurality of protrusions and a plurality of depressions, and the depressions are formed between every two adjacent protrusions to form a structure in which the protrusions and the depressions are alternately arranged.
5. The backlight module of claim 4, wherein: the bulges are semi-elliptical, and the height of the bulges is 5-9 mm.
6. The backlight module of claim 4, wherein: the bottom of the recess is a plane, and the length of the plane is 2-5 mm.
7. A backlight module according to any of claims 3 to 6, wherein: the height of the straight part is 5-8 mm.
8. A backlight module according to any of claims 2 to 6, wherein: the second conversion film comprises a first edge, a second edge and a third edge which are sequentially bent, the second edge is arranged opposite to the light source assembly, and two ends of the second edge are respectively connected with the first edge and the third edge;
the first edge, the second edge and the third edge are of split structures; or the first edge, the second edge and the third edge are of an integrally formed structure.
9. A backlight module according to any of claims 2 to 6, wherein: the third conversion film includes:
the body part is arranged on the side edge of the light guide plate opposite to the light source component; and
the first bending part is bent and extended from one end of the body part towards the direction of the light source component; and
and the second bending part is bent and extended from the other end of the body part towards the direction of the light source component.
10. A display device, characterized in that: the display device comprises a display component and the backlight module set forth in any one of claims 1 to 9, wherein the display component is arranged on the light-emitting surface of the quantum dot film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486865.XA CN114326205A (en) | 2021-12-07 | 2021-12-07 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111486865.XA CN114326205A (en) | 2021-12-07 | 2021-12-07 | Backlight module and display device |
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| CN114326205A true CN114326205A (en) | 2022-04-12 |
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| CN202111486865.XA Pending CN114326205A (en) | 2021-12-07 | 2021-12-07 | Backlight module and display device |
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Application publication date: 20220412 |