CN111880336A - Backlight assembly and liquid crystal display module - Google Patents
Backlight assembly and liquid crystal display module Download PDFInfo
- Publication number
- CN111880336A CN111880336A CN202010758493.0A CN202010758493A CN111880336A CN 111880336 A CN111880336 A CN 111880336A CN 202010758493 A CN202010758493 A CN 202010758493A CN 111880336 A CN111880336 A CN 111880336A
- Authority
- CN
- China
- Prior art keywords
- light
- liquid crystal
- plate
- middle frame
- backlight assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight assembly and a liquid crystal display module, the backlight assembly comprises a middle frame, a back plate, a diffusion plate, a reflector plate and a light guide unit, wherein the middle frame is used for supporting a liquid crystal panel, the back plate is buckled at the rear side of the middle frame, a plurality of light sources are arranged on the back plate, the diffusion plate is lapped on the middle frame, the diffusion plate is positioned between the liquid crystal panel and the back plate, the reflector plate is lapped on the middle frame, the reflector plate is positioned between the diffusion plate and the back plate, the light guide unit is lapped on the middle frame and positioned between the reflector plate and the diffusion plate, and the light guide unit is used for guiding light rays emitted by the light sources. The backlight assembly increases the incident light at the edge of the diffusion plate, thereby solving the problem of uneven brightness of a bright and dark frame and the like at the edge of the whole liquid crystal display module when a liquid crystal panel with a smaller BM width value is adopted.
Description
Technical Field
The invention relates to the technical field of liquid crystal display equipment, in particular to a backlight assembly and a liquid crystal display module.
Background
The liquid crystal display module comprises a liquid crystal panel and a backlight assembly, and according to the position of a light source, the liquid crystal module is mainly divided into a direct type liquid crystal display module and a side type liquid crystal display module at present, because of the extremely-demanding requirements of consumers on the appearance of products, the frames of the liquid crystal television are more and more narrow, the thickness of the products is more and more thin, in order to meet the requirements of the frames of the products, BM zones (black zones around a visible zone) on four sides of the liquid crystal panel are also more and more small, the width of the previous BM zone is equal to 7.9MM, the width of the previous BM zone is equal to 5.9MM, and the width of. The minimum value of the width in present BM district can reach 0.5mm, and this has provided new challenge to liquid crystal module scheme design, and common concatenation screen all forms for the backlight unit concatenation of a plurality of straight following formula, and after BM width dwindles gradually, traditional liquid crystal module scheme can not satisfy the design requirement of product, and the visual taste problem of luminance inequality such as bright dark frame can appear in four edges of product.
Disclosure of Invention
One objective of the present invention is to provide a backlight assembly, which can adapt to a liquid crystal panel with a smaller BM region width, and better solve the problem of uneven brightness such as bright and dark frames appearing at the edge of a liquid crystal display module.
Another objective of the present invention is to provide a liquid crystal display module, which can better solve the problem of uneven brightness such as dark and bright frames appearing on the edge.
In order to achieve the above technical effects, the technical solution of this embodiment is as follows:
the invention discloses a backlight assembly, comprising: the middle frame is used for supporting the liquid crystal panel; the back plate is buckled at the rear side of the middle frame and is provided with a plurality of light sources; the diffusion plate is lapped on the middle frame and is positioned between the liquid crystal panel and the back plate; the reflector plate is lapped on the middle frame and is positioned between the diffusion plate and the back plate, and the light source penetrates through the reflector plate; the light guide unit is in lap joint on the middle frame, the light guide unit is provided with a light outgoing surface, a reflecting surface and a light incoming surface, the light outgoing surface is supported on the diffusion plate, the reflecting surface faces the middle frame and/or the reflecting plate, and the light incoming surface faces the light source.
In some embodiments, the light guide unit includes a plurality of light guide bars disposed around the diffusion plate.
In some optional embodiments, the light guide unit has a light emitting surface, a reflecting surface and a light incident surface, the light emitting surface is stopped against the diffusion plate, the reflecting surface is disposed toward the middle frame and the reflection sheet, and the light incident surface is disposed toward the light source.
In some optional embodiments, the light-emitting surface is provided with a convex optical texture, and the reflecting surface facing the reflecting sheet is provided with a plurality of light-transmitting dots.
In some optional embodiments, the middle frame has a first supporting step, a second supporting step and a third supporting step sequentially arranged from front to back, the liquid crystal panel abuts against the first supporting step, the diffusion plate abuts against the second supporting step, and the reflection sheet abuts against the third supporting step.
In some optional embodiments, the light guide unit has an extension extending toward the light source and beyond the third support step.
In some embodiments, the back plate comprises: a flat plate; the plug flange is arranged around the plane plate and is plugged in the plug groove of the middle frame.
In some optional embodiments, the insertion flange is provided with an installation lug spaced from the planar plate, the middle frame is provided with a fourth support step, the installation lug is lapped on the fourth support step, the installation lug is connected with the fourth support step through a connecting piece, and the connecting piece is located on the front side of the planar plate.
In some embodiments, an optical film is disposed on a side wall of the diffusion plate facing the liquid crystal panel, and the optical film includes at least one of a brightness enhancement film, a light collection film, and a polarizing film.
The invention also discloses a liquid crystal display module which comprises the backlight assembly and the liquid crystal panel matched with the backlight assembly.
According to the backlight assembly, the light guide unit is arranged between the diffusion plate and the middle frame, the light guide unit can guide light rays emitted by the light source into the edge of the diffusion plate, the overlapping width of the diffusion plate and the middle frame can be reduced, and the incident light of the edge of the diffusion plate is increased, so that the problem of uneven brightness of a bright frame and a dark frame and the like at the edge of the whole liquid crystal display module when a liquid crystal panel with a smaller BM width value is adopted is solved.
The liquid crystal display module of the invention, because of having the backlight assembly, better solve the edge of the whole liquid crystal display module and will appear bright dark frame when adopting the liquid crystal panel with smaller BM width value and so on the uneven problem of luminance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a liquid crystal display module according to an embodiment of the invention.
FIG. 2 is a cross-sectional view of a portion of a liquid crystal display module according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a light guide unit according to an embodiment of the present invention.
Reference numerals:
1. a middle frame; 11. a first support step; 12. a second support step; 13. a third support step; 14. inserting grooves; 15. a fourth support step;
2. a back plate; 21. a flat plate; 22. inserting and flanging; 221. mounting lugs;
3. a diffusion plate;
4. a reflective sheet;
5. a light guide unit; 51. a light-emitting surface; 511. optical lines; 52. a reflective surface; 521. a light-transmitting mesh point; 53. a light incident surface;
6. an optical film; 7. a connecting member; 8. a liquid crystal panel; 9. soaking cotton glue; 10. a light source.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes a configuration diagram of a backlight assembly according to an embodiment of the present invention with reference to fig. 1 to 3.
As shown in fig. 1 to 3, the backlight assembly according to the embodiment of the invention includes a middle frame 1, a back plate 2, a diffusion plate 3, a reflective sheet 4 and a light guide unit 5, wherein the middle frame 1 is used for supporting a liquid crystal panel 8, the back plate 2 is fastened to a rear side of the middle frame 1, a plurality of light sources 10 are disposed on the back plate 2, the diffusion plate 3 is lapped on the middle frame 1, the diffusion plate 3 is located between the liquid crystal panel 8 and the back plate 2, the reflective sheet 4 is lapped on the middle frame 1, the reflective sheet 4 is located between the diffusion plate 3 and the back plate 2, and the light sources 10 are disposed through the reflective sheet 4. The light guide unit 5 is overlapped on the middle frame 1, the light guide unit 5 has a light emitting surface 51, a reflecting surface 52 and a light incident surface 53, the light emitting surface 51 is stopped on the diffusion plate 3, the reflecting surface 52 faces the middle frame 1 and/or the reflecting sheet 4, and the light incident surface 53 faces the light source 10.
It should be noted that, the more the incident light at the edge of the diffusion plate 3 is, the smaller the width of the BM area of the liquid crystal panel 8 can be, and the narrower the frame of the whole liquid crystal display module is. In the prior art, the edge of the diffusion plate 3 directly abuts against the middle frame 1, in order to ensure the stability of the diffusion plate 3, the overlapping width of the diffusion plate 3 and the middle frame 1 is relatively large, and the larger the overlapping width of the diffusion plate 3 and the middle frame 1 is, the less the incident light at the edge of the diffusion plate 3 is, so that the narrow frame design of the liquid crystal display module is not facilitated.
It can be understood that, in the backlight assembly of the present invention, the light emitting surface 51 of the light guiding unit 5 is stopped against the diffusion plate 3. On one hand, the light guide unit 5 can support the diffusion plate 3, so that the overlapping width of the diffusion plate 3 and the middle frame 1 can be reduced, and the incident light at the edge of the diffusion plate 3 is increased, and on the other hand, the light emitted by the light source 10 can illuminate the part, abutted against the diffusion plate 3 and the light guide unit 5, of the diffusion plate 3 after being guided by the light guide unit 5, so that the incident light at the edge of the diffusion plate 3 is further increased. Thus, the light guide unit 5 additionally arranged can better increase the incident light at the edge of the diffusion plate 3, thereby solving the problem of uneven brightness of a bright and dark frame and the like at the edge of the whole liquid crystal display module when the liquid crystal panel 8 with a smaller BM width value is adopted.
In the backlight module of the present embodiment, since the light guide unit 5 is disposed between the diffusion plate 3 and the middle frame 1, the light guide unit 5 can guide the light emitted from the light source 10 into the edge of the diffusion plate 3, and the light guide unit 5 can also reduce the overlapping width between the diffusion plate 3 and the middle frame 1, and increase the incident light at the edge of the diffusion plate 3, thereby solving the problem of uneven brightness such as a bright and dark frame at the edge of the whole liquid crystal display module when the liquid crystal panel 8 with a small BM width value is adopted.
In some embodiments, the light guiding unit 5 includes a plurality of light guiding strips disposed around the diffusion plate 3. Therefore, the incident light intensity of the periphery of the diffusion plate 3 can be ensured to be higher, and the phenomenon of uneven brightness at the edge of the liquid crystal display module is avoided.
In some alternative embodiments, as shown in fig. 2-3, the light guiding unit 5 has a light emitting surface 51, a reflecting surface 52 and a light incident surface 53, the light emitting surface 51 is stopped on the diffusion plate 3, the reflecting surface 52 is disposed towards the middle frame 1 and the reflection sheet 4, and the light incident surface 53 is disposed towards the light source 10. It can be understood that the light emitted from the light source 10 enters the light guide unit 5 from the light incident surface 53 and is emitted from the light emitting surface 51 after being reflected by the reflecting surface 52, so as to illuminate the portion of the diffuser plate 3 abutting against the light guide unit 5, thereby ensuring the light guiding effect of the light guide unit 5 on the light emitted from the light source 10.
In some alternative embodiments, as shown in fig. 2 to fig. 3, there are one light emitting surface 51 and one light incident surface 53, and there are two reflecting surfaces 52, where one reflecting surface 52 is stopped against the middle frame 1, and the other reflecting surface 52 is stopped against the reflection sheet 4. Therefore, the light entering the light guide unit 5 from the light entering surface 53 can be better ensured to be emitted from the light emitting surface 51, and the light entering intensity of the edge of the diffusion plate 3 is ensured. Of course, the number of the light emitting surface 51, the light incident surface 53 and the reflecting surface 52 can be selected according to actual needs, and is not limited to the limitation of the embodiment.
In some optional embodiments, as shown in fig. 3, the light-emitting surface 51 is provided with a convex optical texture 511. It can be understood that the added optical texture 511 can increase the coverage of the light emitted from the light emitting surface 51, so as to increase the incident light on the edge of the diffusion plate 3, and on the other hand, the optical texture 511 can prop up the light diffusion plate, so that a certain gap is formed between the edge of the light diffusion plate and the middle frame 1, and the gap can further increase the incident light on the edge of the diffusion plate 3.
Optionally, the optical texture 511 is formed as protrusions distributed at intervals along the length direction of the light guide bar, the distance between two adjacent protrusions is 100 μm to 200 μm, and the height is 30 μm to 80 μm. Of course, in other embodiments of the present invention, the shape of the optical texture 511 may be determined according to the shape of the light emitting surface 51 and the shape of the diffusion plate 3, and the shape of the optical texture 511 is not limited herein.
In some alternative embodiments, the reflective surface 52 disposed toward the reflective sheet 4 is provided with a plurality of light-transmissive dots 521. It can be understood that, because there are two reflecting surfaces 52, the existence of the light-transmitting dots 521 can avoid the occurrence of total reflection of the light entering the light guide unit 5 from the light-entering surface 53, and ensure that the light entering the light guide unit 5 from the light-entering surface 53 can exit from the light-exiting surface 51, thereby increasing the light entering the edge of the diffuser plate 3.
Optionally, the reflecting surface 52 abutting on the reflector 4 is adhered to the reflector 4 by using an OCA (optically Clear adhesive) colloid, and the optical refractive index of the OCA colloid is closer to air, so that the optical effect is better, and the light reflected by the reflector 4 can be incident into the light guide unit 5 from the light-transmitting dots 521, thereby further increasing the incident light at the edge of the diffuser plate 3.
Optionally, the transparent dots 521 may be protrusions or pits, and the cross section of the transparent dots 521 may be circular, rectangular, triangular or polygonal, and may be specifically selected according to actual needs.
In some alternative embodiments, the light incident surface 53 of the light guide unit 5 is provided with a functional optical film. Therefore, the brightness, the chromaticity and various optical indexes of the area of the light guide unit 5 can be adjusted, and the incident light at the edge of the diffusion plate 3 can be better improved.
Optionally, the light incident surface 53 of the light guide unit 5 is polished, so that the diffuse reflection of the light incident surface 53 can be reduced, and the light incident efficiency of the light incident surface 53 of the light guide unit 5 can be increased.
In some alternative embodiments, as shown in fig. 2, the middle frame 1 has a first supporting step 11, a second supporting step 12 and a third supporting step 13 arranged from front to back, the liquid crystal panel 8 abuts on the first supporting step 11, the diffusion plate 3 abuts on the second supporting step 12, and the reflection sheet 4 abuts on the third supporting step 13. It can be understood that the first supporting step 11 is adopted to support the liquid crystal panel 8, the second supporting step 12 and the light guide unit 5 support the diffusion plate 3 together, and the third supporting step 13 supports the reflector plate 4 and the light guide unit 5, so that the stability of the liquid crystal panel 8, the diffusion plate 3, the light guide unit 5 and the reflector plate 4 is better ensured, and the display problem caused by the deflection of the liquid crystal panel 8, the diffusion plate 3, the light guide unit 5 and the reflector plate 4 in the carrying and transporting process is avoided.
In some alternative embodiments, the light guide unit 5 has an extension extending toward the light source 10 and beyond the third support step 13. It will be appreciated that the extension of the light guiding unit 5 beyond the third supporting step 13 enables the light guiding unit 5 to further increase the amount of light guided by the light guiding unit 5 at the protruding portion, thereby further increasing the incident light at the edge of the diffuser plate 3.
In some alternative embodiments, the area ratio of the overlapping portion of the light guide unit 5 and the third supporting step 13 is gradually increased, and the area ratio of the light-transmitting dots 521 of the light guide unit 5 is higher closer to the edge of the third supporting step 13, and may be 40% to 100%. In order to ensure that the extension portion of the light guide unit 5 has a softer transition visual effect, a light-transmitting dot 521 is disposed on the extension portion of the light guide unit 5 extending out of the third supporting step 13, and the area ratio of the light-transmitting dot 521 is 20% -40%.
Advantageously, the extension of the light-guiding unit 5 beyond the third support step 13 has a blank area. That is, the light guide unit 5 extends out of the third supporting step 13, and only a part of the area is provided with the light-transmitting dots 521, and the other part is not provided with the light-transmitting dots 521. Further, the width of the region where the light-transmitting dots 521 are disposed is 2mm to 5mm, and the width of the region where the light-transmitting dots 521 are not disposed is 5 mm.
In some embodiments, as shown in fig. 2, the back plate 2 includes a flat plate 21 and an insertion flange 22, the insertion flange 22 is disposed around the flat plate 21, and the insertion flange 22 is inserted into the insertion groove 14 of the middle frame 1. It can be understood that, compared with the back plate 2 having the inclined flange of the prior art, the back plate 2 of the present embodiment is more convenient to process, thereby reducing the production cost of the entire backlight assembly. In addition, the splicing structure of the back plate 2 and the middle frame 1 can not only ensure the connection stability of the back plate 2 and the middle frame 1, but also improve the compatibility of the back plate 2. Specifically, the existing backlight assembly needs to manufacture different back plates 2 for different sizes of liquid crystal panels 8, which reduces the compatibility of the backlight assembly with the liquid crystal panels 8. In the embodiment, only different middle frames 1 need to be replaced for different liquid crystal panels 8, and the backboard 2 does not need to be manufactured again, so that the compatibility of the backboard 2 can be improved. In addition, in the processing process, the manufacturing cost of the back plate 2 in the backlight assembly is high, and the back plate 2 of the embodiment has good compatibility, so that the production and manufacturing cost of the backlight assembly is indirectly reduced.
In some alternative embodiments, as shown in fig. 2, the inserting flange 22 is provided with a mounting ear 221 spaced apart from the plane plate 21, the middle frame 1 is provided with a fourth supporting step 15, the mounting ear 221 overlaps the fourth supporting step 15, the mounting ear 221 and the fourth supporting step 15 are connected by a connecting member 7, and the connecting member 7 is located on the front side of the plane plate 21. It can be understood that, after the inserting flange 22 is inserted into the inserting groove 14, the fourth supporting step 15 of the middle frame 1 is connected with the mounting ear 221 by the connecting piece 7, so that the connection stability of the back plate 2 and the middle frame 1 is further ensured, and the connecting piece 7 can be hidden between the back plate 2 and the middle frame 1, so that the connecting hole and the connecting structure cannot be seen from the outer side of the back plate 2, and the aesthetic degree of the whole backlight assembly is improved.
In some embodiments, as shown in fig. 2, an optical film 6 is disposed on a sidewall of the diffuser plate 3 facing the liquid crystal panel 8, and the optical film 6 includes at least one of a brightness enhancement film, a light collection film, and a polarizing film. Therefore, the brightness, the chromaticity and various optical indexes of the diffusion plate 3 area can be adjusted, and the display effect of the liquid crystal display module is improved.
The invention also discloses a liquid crystal display module which comprises the backlight component and the liquid crystal panel 8 matched with the backlight component.
The liquid crystal display module of the invention, because of having the backlight assembly stated above, solve the problem of uneven brightness such as bright and dark frames appearing at the edge of the whole liquid crystal display module when using the liquid crystal panel 8 with smaller BM width value well.
Example (b):
as shown in fig. 1 to 3, the liquid crystal display module of the present embodiment includes a backlight assembly and a liquid crystal panel 8 fitted on the backlight assembly.
The backlight assembly comprises a middle frame 1, a back plate 2, a diffusion plate 3, a reflector plate 4, a light guide unit 5 and an optical film 6, wherein the middle frame 1 is provided with a first supporting step 11, a second supporting step 12, a third supporting step 13 and a first supporting step 11 which are sequentially arranged from front to back, and the middle frame 1 is also provided with a plug-in groove 14. The liquid crystal panel 8 is bonded to the first supporting step 11 by the foam adhesive 9.
The back plate 2 comprises a plane plate 21 and an inserting flanging 22, the plane plate 21 is provided with a plurality of light sources 10, the inserting flanging 22 surrounds the plane plate 21, the inserting flanging 22 is inserted into the inserting groove 14 of the middle frame 1, the inserting flanging 22 is provided with an installing lug 221 arranged at an interval with the plane plate 21, and the installing lug 221 and the fourth supporting step 15 are connected through a connecting piece 7.
The diffusion plate 3 is located between the liquid crystal panel 8 and the back plate 2, and the reflection sheet 4 is lapped on the third supporting step 13 on the middle frame 1. Light guide unit 5 includes four light guide strips of laminating around diffuser plate 3, and every light guide strip has a play plain noodles 51, two plane of reflection 52 and income plain noodles 53, is equipped with protruding optical line 511 of establishing on play plain noodles 51, and optical line 511 forms the arch that sets up along light guide strip length interval, and protruding end is supported on diffuser plate 3 to make form the gap between diffuser plate 3 and the second support step 12. The reflecting surface 52 is stopped on the middle frame 1 and the reflecting sheet 4, and the light incident surface 53 is disposed toward the light source 10. An optical film 6 is provided on the side wall of the diffuser plate 3 facing the liquid crystal panel 8
The liquid crystal display module of the embodiment has the following advantages:
first, different from the traditional direct type back plate structure, the back plate 2 of the embodiment has no bevel edge structure, so that the processing difficulty of the back plate 2 is simplified, and the size stability, the product strength and the product attractiveness of the product are improved;
secondly, the method comprises the following steps: different from the traditional direct type backboard structure, the diffusion plate 3 of the embodiment is not directly placed on the folded edge of the backboard 2 any more, but the light guide unit 5 is added on the middle frame 1, the light guide unit 5 increases the incident light at the edge of the diffusion plate 3, and the problem of uneven brightness of a bright and dark frame and the like at the edge when the traditional liquid crystal module applies the liquid crystal panel 8 with a smaller BM width value is well solved;
thirdly, the method comprises the following steps: the middle frame 1 and the back plate 2 adopt a connecting piece 7 to be locked inside the back plate 2, so that a screw-free back beautifying structure of the whole module back liquid crystal display module is realized, and the attractiveness of the product is improved.
In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (10)
1. A backlight assembly, comprising:
a middle frame (1), wherein the middle frame (1) is used for supporting a liquid crystal panel (8);
the back plate (2) is buckled at the rear side of the middle frame (1), and a plurality of light sources (10) are arranged on the back plate (2);
the diffusion plate (3) is lapped on the middle frame (1), and the diffusion plate (3) is positioned between the liquid crystal panel (8) and the back plate (2);
the reflecting sheet (4) is lapped on the middle frame (1), the reflecting sheet (4) is located between the diffusion plate (3) and the back plate (2), and the light source (10) penetrates through the reflecting sheet (4);
the light guide unit (5) is in lap joint with the middle frame (1) and located between the reflector plate (4) and the diffusion plate (3), and the light guide unit (5) is used for guiding light rays of the light source (10) to the diffusion plate (3).
2. The backlight assembly according to claim 1, wherein the light guide unit (5) comprises a plurality of light guide bars disposed around the diffusion plate (3).
3. The backlight assembly of claim 2, wherein the light guide unit (5) has a light emitting surface (51), a reflecting surface (52) and a light incident surface (53), the light emitting surface (51) is abutted against the diffusion plate (3), the reflecting surface (52) is disposed towards the middle frame (1) and the reflection sheet (4), and the light incident surface (53) is disposed towards the light source (10).
4. The backlight assembly as claimed in claim 3, wherein the light emitting surface (51) is provided with a convex optical texture (511), and the reflecting surface (52) facing the reflective sheet (4) is provided with a plurality of light transmitting dots (521).
5. The backlight assembly according to claim 1, wherein the middle frame (1) has a first supporting step (11), a second supporting step (12) and a third supporting step (13) sequentially arranged from front to back, the liquid crystal panel (8) abuts on the first supporting step (11), the diffusion plate (3) abuts on the second supporting step (12), and the reflection sheet (4) abuts on the third supporting step (13).
6. The backlight assembly according to claim 5, wherein the light guide unit (5) has an extension extending toward the light source (10) and beyond the third support step (13).
7. The backlight assembly according to claim 1, wherein the back plate (2) comprises:
a flat plate (21);
the plug-in flanging (22), the plug-in flanging (22) surrounds the plane plate (21), and the plug-in flanging (22) is plugged in the plug-in groove (14) of the middle frame (1).
8. The backlight assembly of claim 7, wherein the inserting flange (22) is provided with a mounting ear (221) spaced from the plane plate (21), the middle frame (1) is provided with a fourth supporting step (15), the mounting ear (221) is overlapped on the fourth supporting step (15), the mounting ear (221) and the fourth supporting step (15) are connected by a connector (7), and the connector (7) is located at the front side of the plane plate (21).
9. The backlight assembly according to claim 1, wherein an optical film (6) is disposed on a side wall of the diffusion plate (3) facing the liquid crystal panel (8), and the optical film (6) comprises at least one of a brightness enhancement film, a light collection film, and a polarizing film.
10. A liquid crystal display module comprising the backlight assembly as claimed in any one of claims 1 to 9 and a liquid crystal panel (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758493.0A CN111880336A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010758493.0A CN111880336A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111880336A true CN111880336A (en) | 2020-11-03 |
Family
ID=73204742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010758493.0A Pending CN111880336A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111880336A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019711A (en) * | 2021-11-23 | 2022-02-08 | 深圳创维－Rgb电子有限公司 | Straight following formula liquid crystal module and display device |
| CN114326207A (en) * | 2021-12-27 | 2022-04-12 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN115128871A (en) * | 2022-08-30 | 2022-09-30 | 惠科股份有限公司 | Backlight module, brightness control method thereof and display device |
| WO2023230809A1 (en) * | 2022-05-31 | 2023-12-07 | 京东方科技集团股份有限公司 | Backlight module, display module, tiled display screen and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066013A (en) * | 2015-09-18 | 2015-11-18 | 京东方科技集团股份有限公司 | Backlight source structure and display device |
| CN109407400A (en) * | 2018-11-23 | 2019-03-01 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and display equipment |
| CN109507822A (en) * | 2019-01-14 | 2019-03-22 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| KR20190052843A (en) * | 2017-11-09 | 2019-05-17 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN209356802U (en) * | 2019-03-27 | 2019-09-06 | 深圳创维－Rgb电子有限公司 | Backlight module and liquid crystal display device |
| CN111399281A (en) * | 2020-03-26 | 2020-07-10 | 深圳创维－Rgb电子有限公司 | Liquid crystal backlight module, liquid crystal display screen and electronic equipment |
-
2020
- 2020-07-31 CN CN202010758493.0A patent/CN111880336A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066013A (en) * | 2015-09-18 | 2015-11-18 | 京东方科技集团股份有限公司 | Backlight source structure and display device |
| KR20190052843A (en) * | 2017-11-09 | 2019-05-17 | 엘지디스플레이 주식회사 | Liquid crystal display device |
| CN109407400A (en) * | 2018-11-23 | 2019-03-01 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and display equipment |
| CN109507822A (en) * | 2019-01-14 | 2019-03-22 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN209356802U (en) * | 2019-03-27 | 2019-09-06 | 深圳创维－Rgb电子有限公司 | Backlight module and liquid crystal display device |
| CN111399281A (en) * | 2020-03-26 | 2020-07-10 | 深圳创维－Rgb电子有限公司 | Liquid crystal backlight module, liquid crystal display screen and electronic equipment |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114019711A (en) * | 2021-11-23 | 2022-02-08 | 深圳创维－Rgb电子有限公司 | Straight following formula liquid crystal module and display device |
| CN114019711B (en) * | 2021-11-23 | 2024-03-12 | 深圳创维－Rgb电子有限公司 | Direct type liquid crystal module and display device |
| CN114326207A (en) * | 2021-12-27 | 2022-04-12 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| WO2023230809A1 (en) * | 2022-05-31 | 2023-12-07 | 京东方科技集团股份有限公司 | Backlight module, display module, tiled display screen and display device |
| CN115128871A (en) * | 2022-08-30 | 2022-09-30 | 惠科股份有限公司 | Backlight module, brightness control method thereof and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111880336A (en) | Backlight assembly and liquid crystal display module | |
| KR100932304B1 (en) | Light guide plate for backlight unit having an asymmetric prism on the back and liquid crystal display using the same | |
| KR101676872B1 (en) | optical assembly, backlight unit having the same, and display apparatus thereof | |
| CN113707034B (en) | Tiled display device | |
| KR100942490B1 (en) | Light guide panel for LCD back light unit and LCD back light unit thereby | |
| EP2743573B1 (en) | Backlight module and display device | |
| US20140218971A1 (en) | Display device, joint display and backlight module | |
| CN112068353A (en) | Liquid crystal display module and liquid crystal splicing screen | |
| US20120063168A1 (en) | Surface light source device and frame used therein | |
| CN105044981A (en) | Backlight module and liquid crystal display device | |
| CN101936509A (en) | Backlight structure and production method thereof | |
| CN101424823A (en) | Micro-edge splicing LCD flat panel display and spliced TV wall | |
| CN109613752B (en) | Backlight module and display device | |
| CN104503125A (en) | Plastic frame, backlight module and liquid crystal panel | |
| CN104880845A (en) | Liquid crystal display module, liquid crystal display and mobile terminal | |
| US9658390B2 (en) | Light source cover including groove and backlight assembly including the light source cover | |
| CN101832517A (en) | Back light module | |
| CN110908191A (en) | Display module and display device | |
| CN111880337A (en) | Backlight assembly and liquid crystal display module | |
| CN101403834B (en) | Backlight component | |
| CN211123563U (en) | Liquid crystal display module with improved light-emitting effect | |
| CN210835519U (en) | Display screen backlight module | |
| CN112068352A (en) | Backlight module and liquid crystal module | |
| CN213092070U (en) | Backlight assembly and display module | |
| US20090147183A1 (en) | Backlight unit and flat panel display having the backlight unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201103 |