CN216210356U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN216210356U CN216210356U CN202122567683.7U CN202122567683U CN216210356U CN 216210356 U CN216210356 U CN 216210356U CN 202122567683 U CN202122567683 U CN 202122567683U CN 216210356 U CN216210356 U CN 216210356U
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Abstract
The utility model relates to a backlight module and a display device. A backlight module and a display device are provided, the backlight module includes: a frame; the light source module is arranged in the accommodating space of the frame; the optical film group is arranged above the light source module and is positioned in the accommodating space; the light conversion piece is arranged on one side of the side wall, which faces the light source, and can be converted into white light by the light emitted by the light source. The backlight module and the light conversion part of the display device, which are positioned on the side wall, can withstand impact tests or be used for a long time, and are not easy to fall off.
Description
Technical Field
The present invention relates to a display technology, and more particularly, to a backlight module and a display device having the same.
Background
The current trend of display devices is developing from the previous appearance of large volume and heavy weight toward the direction of thinning and light weight, and the frame width of the display device gradually trends toward the design of narrow frame, so that the whole volume of the display device is reduced, the area of the display picture which can be seen by the display device with the same size is larger, and the visual effect is better.
The direct-type backlight module is formed by arranging a plurality of light emitting diodes into an array, placing the array behind a diffusion plate and a Liquid Crystal Display (LCD), and directly irradiating the LCD. Therefore, the direct type backlight module can follow the brightness change of different parts of the picture, quickly fine-tune the brightness of the light-emitting diodes, and greatly improve the dynamic contrast to the optimal level.
Under the condition of the narrow frame design, the frame of the display device can not provide the function of shielding unexpected light, so that the backlight module generates light leakage or halo around the frame. When a blue Light Emitting Diode (LED) is used as a Light source, blue Light is converted into white Light through a wavelength conversion film in an optical film set, however, since the wavelength conversion film has a thin thickness of phosphor coating or is packaged at the edge, the blue Light conversion efficiency at the edge is low, and blue Light leakage or blue halo is generated around a display region, so that the problem of blue edge is caused on an image of the liquid crystal display device.
In order to solve the problem of blue edge of direct type backlight module, the current practice is to print yellow ink under the prism sheet or on other optical films, but because the surface of the optical film is smooth, the ink will drop off after the impact drop test of the product printed on the film, so the problem of blue light leakage or blue halo is still easily generated around the display area.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a backlight module and a display device, which are used for improving the difficulty of falling off of a light conversion piece of a peripheral blue halo.
In order to achieve the above object, the present invention provides a backlight module, which includes: the frame comprises a side wall, the side wall frame encloses an accommodating space, and the frame is provided with at least one first combining part; the light source module is arranged in the accommodating space and comprises a substrate and a plurality of light sources arranged on the substrate; the optical diaphragm group is arranged above the light source module and is positioned in the accommodating space, wherein the optical diaphragm group is provided with at least one second combining part, and the second combining part is combined with the corresponding first combining part; the light conversion piece is arranged on one side of the side wall, which faces the light source, and can be converted into white light by the light emitted by the light source.
Preferably, the height of the light conversion member is not less than the thickness of the light source module.
Preferably, the height of the light conversion member is not less than the thickness of the combination of the light source module and the optical film set.
Preferably, the light source module further includes an encapsulation adhesive, the encapsulation adhesive encapsulates the light source and forms a main light emitting surface and a light emitting side surface, the light emitting side surface faces the light conversion member, and the height of the light conversion member is not less than the height of the light emitting side surface.
Preferably, the first bonding portions are a plurality of grooves on the sidewall, and the second bonding portions of the optical film group are a plurality of lugs, and the lugs are correspondingly bonded to the grooves.
Preferably, the frame further includes a plate body, the sidewall is disposed at a periphery of the plate body, the first coupling portion is at least one protruding pillar extending upward from the plate body, the second coupling portion of the optical film group is at least one through hole, and the through hole is correspondingly coupled to the protruding pillar.
Preferably, the light conversion member is disposed on the sidewall around the optical film set, and at least one notch is formed in the light conversion member, where the notch corresponds to a bonding position of the first bonding portion and the second bonding portion.
Preferably, a gap is formed between the light conversion member and the optical film set.
To achieve the above object, the present invention provides a display device, which comprises: the backlight module comprises a side wall, a backlight module and a liquid crystal panel, wherein the side wall is provided with a plurality of side walls, the side walls are arranged on the side wall, and the side walls are provided with a plurality of side walls.
Compared with the prior art, the backlight module and the light conversion part of the display device, which are positioned on the side wall, can withstand an impact test or be used for a long time, and the problem that the light conversion part falls off is not easy to occur.
Drawings
Fig. 1 is a schematic view of a backlight module according to an embodiment of the disclosure.
Fig. 2 is a schematic cross-sectional view of a backlight module according to an embodiment of the present disclosure.
Fig. 3 is a schematic view of a backlight module according to another embodiment of the disclosure.
FIG. 4 is a cross-sectional view of a backlight module with an encapsulant.
FIG. 5 is a cross-sectional view of a backlight module with an encapsulant.
Fig. 6 is a schematic diagram of a display device according to an embodiment of the disclosure.
Detailed Description
The present invention will now be described in detail with reference to the drawings, wherein the drawings are simplified schematic drawings only to illustrate the basic structure of the present invention, and only the elements related to the present invention are shown in the drawings, and the elements are not drawn in terms of number, shape, size ratio and the like during the implementation, and the specification and the size during the actual implementation are actually designed selectively, and the layout of the elements may be more complicated.
The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the utility model may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", etc., refer to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In addition, in the description, unless explicitly described to the contrary, the word "comprise" will be understood to mean that the elements described are included, but not to the exclusion of any other elements.
Please refer to fig. 1 and fig. 2, which are schematic diagrams and cross-sectional schematic diagrams of a backlight module according to the present invention. A backlight module 100, the backlight module 100 comprising: the light source module 300 is disposed in the frame 200, the optical film assembly 400 is disposed on the light source module 300, and the light converter 500 is disposed on a side of the frame 200 facing the light source module 300, wherein the light converter 500 is not overlapped with other components or does not generate scratch, so that the light converter 500 can withstand an impact test or be used for a long time, and the light converter 500 is not prone to fall off.
The frame 200 includes a plate 210 and a sidewall 220 disposed on a periphery of the plate 210, the plate 210 and the sidewall 220 form an accommodating space 230, and the frame 200 has at least one first combining portion 240. In practice, the frame 200 may be a portion of a front frame, a plastic frame, or a metal back plate, and the side wall 220 may be a side edge formed by an extension of the front frame, the plastic frame, or the metal back plate toward the light source 320, which is not limited thereto. In this embodiment, the frame 200 is a metal back plate, and the side walls 220 extend upward from the edge of the metal back plate.
The light source module 300 includes a substrate 310 and a plurality of light sources 320 disposed on the substrate 310, wherein the substrate 310 is disposed on the board 210; the Light source 320 is a Light-Emitting Diode (LED), but may be other types of Light-Emitting elements. The light source 320 may be an unpackaged light emitting chip directly cut from a wafer, such as a light emitting diode chip, for example, a die-level nitride light emitting diode chip with a dominant wavelength emitting blue light, which is suitable for providing blue light, but not limited thereto.
The optical film assembly 400 is disposed above the light source module 300 and located in the accommodating space 230, wherein the optical film assembly 400 has at least one second combining portion 410, and the second combining portion 410 is combined with the corresponding first combining portion 240. The backlight module 100 of the present embodiment is a direct-type backlight module, and the optical film assembly 400 may include optical films such as a diffuser plate and a wavelength conversion film.
The light conversion member 500 is disposed on the inner surface of the sidewall 220 and faces one side of the light source 320, and the light conversion member 500 can be converted into white light by the light L emitted from the light source 320. In practice, when the light L emitted by the light source 320 is blue light, the light conversion member 500 is yellow ink, or the light conversion member 500 is yellow phosphor, which can be excited by the blue light to emit white light, but not limited thereto. Because the optical film assembly 400 is located in the accommodating space 230 surrounded by the side wall 220, when the light conversion member 500 is disposed on the inner surface of the side wall 220, the light L emitted from the edge of the optical film assembly 400 is converted into white light, thereby reducing the blue phenomenon of the light leakage at the edge of the light source module 100. Compared with the prior art, the optical film set is supported by the side wall and protrudes out of the accommodating space, the design can not convert the light emitted from the edge of the optical film set into white light, and the edge blue phenomenon is still easy to generate.
In the backlight module 100 of the present embodiment, by disposing the light converter 500 on the surface between the inner surface of the sidewall 220 and the light source module 300, when the light L of the light source 320 is transmitted to the edge of the backlight module 100, part of the light that does not pass through the optical film assembly 400 is complementarily converted by the light color of the light converter 500. When the light source 320 emits blue light, the arrangement of the light conversion member 500 can reduce the blue phenomenon caused by light leakage at the edge of the backlight module 100. The light conversion member 500 of the present embodiment not only achieves the purpose of solving the color shift problem, but also can avoid the problem of failure caused by the light conversion member 500 (yellow ink or yellow phosphor) falling off by changing the position of the light conversion member 500. More specifically, the light conversion member 500 of the backlight module 100 of the present embodiment is located on the sidewall 220 of the frame 200, and the light conversion member 500 does not overlap with other members or generate scratches, so that the surface of the light conversion member 500 does not fall off due to friction caused by relative displacement. For example, the substrate 310 of the light source module 300 on the plate body 210 is fixedly disposed on the surface of the plate body 210, for example, a double-sided tape is attached between the plate body 210 and the substrate 310, so that the substrate 310 of the light source module 300 does not scrape the surface of the light conversion member 500.
In practice, the light converter 500 surrounds the periphery of the light source module 300 and the optical film assembly 400, and the height of the light converter 500 is preferably not less than the thickness of the light source module 300, or the height of the light converter 500 is not less than the thickness of the combination of the light source module 300 and the optical film assembly 400. For example, the height of the light conversion member 500 may be not less than the thickness of the light source module 300, as long as the light from the light source module 300, which is blue due to insufficient light conversion efficiency, can be converted into white light. As shown in fig. 2, the thickness of the light source module 300 combined with the optical film assembly 400 is approximately equal to the height of the light converter 500, and in a preferred application, the height of the light converter 500 is equal to the height of the sidewall 220, completely surrounding the light source module 300 and the optical film assembly 400. Thus, no matter from the light source module 300 or the optical film assembly 400, the blue light caused by insufficient light conversion efficiency can be converted into white light by the light conversion member 500 at the corresponding position. The thickness of the light conversion member 500 is adjusted according to the light L emitted by the light source 320, so as to achieve the best conversion effect.
In application, as shown in fig. 1, the first combining portion 240 is a plurality of grooves 241 on the sidewall 220, the second combining portion 410 of the optical film assembly 400 is a plurality of lugs 411, and the lugs 411 are correspondingly combined with the grooves 241, so as to perform assembling and positioning of the optical film assembly 400, as shown in fig. 1. In addition, the light conversion member 500 is disposed on the sidewall 220 around the optical film assembly 400, so that at least one notch 510 is formed on the light conversion member 500 corresponding to the groove 241 of the first combining portion 240, and the positions of the notches 510 correspond to the combining positions of the first combining portion 240 and the second combining portion 410, that is, the positions of the notches 510 correspond to the combining positions of the groove 241 and the lug 411. In other words, the optical film assembly 400 accommodated in the accommodating space 230 is limited by the first combining portion 240 on the side wall 220 and the second combining portion 410 of the optical film assembly 400, for example, the groove 241 on the side wall 220 and the lug 411 of the optical film assembly 400, which form the mutually matching concave-convex shape, so as to complete the limitation of the optical film assembly 400. Compared with the conventional ink coated on the optical film set, the surface scratch caused by sliding is easily caused by mutual overlapping of the components, and the light conversion member 500 of the embodiment is arranged on the side wall 220, and the scratch problem is not caused, so that the light conversion member has better combination stability, and is not easy to fall off to cause the problem of failure of means for improving color cast. In an embodiment, the depth of the groove 241 may be smaller than the width of the protrusion 411, so that the edge of the optical film assembly 400 does not abut against the light conversion member 500, and it is further ensured that the light conversion member 500 and the optical film assembly 400 do not scratch and fall off.
Referring to fig. 3, in another implementation, the first coupling portion 240 may also be two protruding pillars 242 extending upward from the plate body 210, the second coupling portion 410 of the optical film assembly 400 is a through hole 412 corresponding to the protruding pillars 242, and the through hole 412 is correspondingly coupled to the protruding pillars 242 for assembling and positioning the optical film assembly 400. Similarly, the light conversion member 500a is disposed on the sidewall 220 so as to surround the optical film assembly 400, so that the manufacturing steps of the light conversion member 500a can be simplified; alternatively, the light conversion member 500a is formed with a notch 510a corresponding to the position of the convex pillar 242 of the first combining portion 240, and the position of the notch 510a corresponds to the combining position of the first combining portion 240 and the second combining portion 410, that is, the position of the notch 510a corresponds to the combining position of the convex pillar 242 and the through hole 412, and other mechanisms, such as a lens, are usually provided, so that light does not enter the notch, and therefore, the light conversion member 500 is not required. In the embodiment shown in fig. 3, since the optical film assembly 400 is positioned relative to the plate body 210, a gap is preferably formed between the optical film assembly 400 and the side wall 220, and it is further ensured that the light conversion member 500 and the optical film assembly 400 are not scratched and fall off.
Please refer to fig. 4 and 5, which are schematic cross-sectional views illustrating a backlight module with a light source module having an encapsulant. In an implementation aspect, the light source module 300 preferably includes a plurality of light sources 320 and an encapsulant 330, the encapsulant 330 encapsulates the light sources 320 and forms a main light emitting surface 331 and a light emitting side surface 332, and the light emitting side surface 332 faces the light converter 500. In an example, as shown in fig. 5, the optical film set in the backlight module with the light source module having the encapsulant may include a wavelength conversion film for converting light emitted from the light source into white light; in another embodiment, as shown in fig. 4, the encapsulant 330 may include light conversion particles 333, and the light conversion particles 333 are used to convert light emitted from the light source into white light. The encapsulant 330 for encapsulating the led die should ideally be transparent so that the light emitted from the led die can sufficiently penetrate through the encapsulant to provide high brightness. A portion of the light emitted by the light sources 320 is transmitted to the optical film assembly 400 through the main light emitting surface 331, and another portion of the light is emitted from the light emitting side surface 332, so that the blue light conversion efficiency at the edge is low, and further blue light leakage or blue halo is generated around the display area, thereby causing the problem of blue edge on the image of the liquid crystal display device.
In an implementation application of the present invention, the encapsulant 330 of the light source module 300 is fixed on the substrate 310, the light conversion element 500 surrounds the periphery of the light source module 300 and the optical film assembly 400, and more specifically, the light conversion element 500 is fixed on the side wall 220, so that no relative displacement occurs between the light conversion element 500 and the light emitting side 332 of the encapsulant 330 of the light source module 300, the light conversion element 500 can directly receive blue light from the light emitting side 332 and convert the blue light into white light, the light conversion element 500 extends from the boundary between the side wall 220 and the plate body 210 toward the top end of the side wall 220, or the light conversion element 500 extends from the boundary between the plate body 210 and the encapsulant 330 toward the main light emitting surface 331, and the height of the light conversion element 500 is not less than the height of the light emitting side 332 (as shown in fig. 4); or the height of the light conversion member 500 is approximately equal to the height of the light-emitting side surface 332 and the optical film assembly 400 (as shown in fig. 5), in a preferred embodiment, the height of the light conversion member 500 is equal to the height of the side wall 220, and completely surrounds the light source module 300 and the optical film assembly 400. Thus, the light conversion member 500 can be efficiently converted into white light by the light emitted from the light emitting side surface 332 by the light source 320, and based on the light conversion member 500 being disposed on the sidewall 220, the light conversion member 500 does not overlap with other members or generate scratches, so that the light conversion member 500 is ensured not to be scratched and fall off. Similarly, in the implementation application, when the light L emitted by the light source 320 is blue light, the light conversion member 500 is yellow ink, or the light conversion member 500 is yellow phosphor powder, which can be excited by the blue light to emit white light, but not limited thereto, the light conversion member 500 converts the light L emitted from the edge into white light, thereby reducing the blue phenomenon of the light leakage at the edge of the light source module 100.
In summary, the positioning design of the groove 241 and the protrusion 411 in fig. 1 and the positioning design of the protrusion 242 and the through hole 412 in fig. 3 are designed to have a gap between the light conversion element 500 and the optical film assembly 400, or the fixing arrangement of the encapsulant 330 in fig. 4 with respect to the light conversion element 500 is designed to ensure that no component will be displaced with respect to the surface of the light conversion element 500, so that the light conversion element 500 is prevented from being scratched and falling off.
Fig. 6 is a schematic diagram of a display device according to an embodiment of the disclosure. The backlight module 100 is applied to a display device 700, and includes a display panel 600 and the backlight module 100, wherein the display panel 600 is disposed above the optical film assembly 400, and the liquid crystal panel 600 is supported on the top surface of the sidewall 220, that is, the display panel 700 is disposed above the backlight module 100. The display device of the embodiment may be disposed on the side wall 220 by the light conversion member 500 in the backlight module 100, wherein the frame of the embodiment may be a front frame, a plastic frame, or a metal back plate, and the side wall 220 may be a side wall of the front frame, the plastic frame, or the metal back plate facing the light source 320, which is not limited thereto, so as to ensure that the light conversion member 500 has better combination stability after challenge testing or after long-term use, and the light conversion member 500 is not prone to fall off.
The backlight module utilizes yellow ink or fluorescent powder to form a light conversion member on the side wall of the front frame, the plastic frame or the metal back plate, and when light is emitted from the edge of the backlight module, the light which does not pass through the optical film group can be subjected to light color complementary conversion by the light conversion member on the side wall. Under the condition that the light source emits blue light, the blue phenomenon generated by light leakage at the edge of the backlight module can be reduced by the arrangement of the light conversion piece; the backlight module product can withstand an impact drop test, the light conversion piece is not easy to fall off, and the display device can effectively reduce the problem of edge bluing of the displayed image.
The above-described embodiments are merely illustrative of the principles, features and effects of the present invention, and are not intended to limit the scope of the utility model, which can be modified and varied by those skilled in the art without departing from the spirit and scope of the utility model. Any equivalent changes and modifications made by the present disclosure are intended to be covered by the appended claims.
Description of the reference numerals
100: backlight module
200: frame structure
210: plate body
220: side wall
230: containing space
240: a first combining part
241: groove
242: convex column
300: light source module
310: substrate
320: light source
330: packaging adhesive
331: primary luminous surface
332: luminous side surface
333: light conversion particles
400: optical film group
410: second joint part
411: convex lug
412: perforation
500. 500 a: light conversion member
510. 510 a: gap
600: display panel
700: display device
L: light rays.
Claims (9)
1. A backlight module, comprising:
the frame comprises a side wall, the side wall frame encloses an accommodating space, and the frame is provided with at least one first combining part;
the light source module is arranged in the accommodating space and comprises a substrate and a plurality of light sources arranged on the substrate;
the optical diaphragm group is arranged above the light source module and is positioned in the accommodating space, wherein the optical diaphragm group is provided with at least one second combining part, and the second combining part is combined with the corresponding first combining part; and
the light conversion piece is arranged on one side of the side wall, which faces the light source, and can be converted into white light by the light emitted by the light source.
2. The backlight module according to claim 1, wherein the height of the light conversion member is not less than the thickness of the light source module.
3. The backlight module as claimed in claim 1, wherein the height of the light converter is not less than the thickness of the combination of the light source module and the optical film set.
4. The backlight module of claim 1, wherein the light source module further comprises an encapsulant covering the light source and forming a main light emitting surface and a light emitting side surface, the light emitting side surface faces the light converter, and the height of the light converter is not less than the height of the light emitting side surface.
5. The backlight module as claimed in claim 1, wherein the first bonding portions are a plurality of grooves on the sidewalls, and the second bonding portions of the optical film assembly are a plurality of lugs, and the lugs are correspondingly bonded to the grooves.
6. The backlight module as claimed in claim 1, wherein the frame further comprises a plate body, the sidewall is disposed at a periphery of the plate body, the first coupling portion is at least one protrusion extending upward from the plate body, the second coupling portion of the optical film assembly is at least one through hole, and the through hole is correspondingly coupled to the protrusion.
7. The backlight module as claimed in claim 1, wherein the light converter is disposed on the sidewall around the optical film assembly and has at least one notch, and the position of the notch corresponds to the combination position of the first combination portion and the second combination portion.
8. The backlight module of claim 1, wherein a gap is formed between the light converter and the optical film set.
9. A display device, comprising:
a backlight module according to any one of claims 1 to 8; and the number of the first and second groups,
the liquid crystal panel is arranged above the optical diaphragm group and is supported against the top surface of the side wall.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122567683.7U CN216210356U (en) | 2021-10-25 | 2021-10-25 | Backlight module and display device |
| JP2021004604U JP3236201U (en) | 2021-10-25 | 2021-12-02 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122567683.7U CN216210356U (en) | 2021-10-25 | 2021-10-25 | Backlight module and display device |
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| Publication Number | Publication Date |
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| CN216210356U true CN216210356U (en) | 2022-04-05 |
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| CN202122567683.7U Active CN216210356U (en) | 2021-10-25 | 2021-10-25 | Backlight module and display device |
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| JP (1) | JP3236201U (en) |
| CN (1) | CN216210356U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115116334A (en) * | 2022-07-18 | 2022-09-27 | 友达光电（昆山）有限公司 | Backlight module and display device using same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI829163B (en) * | 2022-03-17 | 2024-01-11 | 瑞儀光電股份有限公司 | Backlight module and display device |
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2021
- 2021-10-25 CN CN202122567683.7U patent/CN216210356U/en active Active
- 2021-12-02 JP JP2021004604U patent/JP3236201U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115116334A (en) * | 2022-07-18 | 2022-09-27 | 友达光电（昆山）有限公司 | Backlight module and display device using same |
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| Publication number | Publication date |
|---|---|
| JP3236201U (en) | 2022-02-03 |
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