CN111880337A - Backlight assembly and liquid crystal display module - Google Patents
Backlight assembly and liquid crystal display module Download PDFInfo
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- CN111880337A CN111880337A CN202010760634.2A CN202010760634A CN111880337A CN 111880337 A CN111880337 A CN 111880337A CN 202010760634 A CN202010760634 A CN 202010760634A CN 111880337 A CN111880337 A CN 111880337A
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- 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
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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, a light guide unit, a first light source and a second light source assembly, 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, 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, the reflector plate is positioned between the diffusion plate and the back plate, the first light source is arranged between the reflector plate and the diffusion plate, the light guide unit is lapped on the middle frame and is positioned between the middle frame and the back plate, and the second light source assembly is connected on the back plate and is positioned between the reflector plate and. One part of the light guide unit is used for guiding the light of the first light source to the diffusion plate, and the other part of the light guide unit is used for guiding the light of the second light source assembly to the diffusion plate. The backlight assembly can adapt to the liquid crystal panel with smaller BM area width, and better solves the problem of uneven brightness of bright and dark frames and the like at the edge of the liquid crystal display module.
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; 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 a first light source is arranged between the reflector plate and the diffusion plate; the light guide unit is overlapped on the middle frame and is positioned between the middle frame and the back plate; the second light source assembly is connected to the back plate and is positioned between the reflector plate and the back plate; wherein: one part of the light guide unit is used for guiding the light of the first light source to the diffusion plate, and the other part of the light guide unit is used for guiding the light of the second light source assembly to the diffusion plate.
In some embodiments, the second light source assembly comprises: one end of the light source mounting plate is connected with the back plate, and the other end of the light source mounting plate faces the reflector plate; the second light source piece, the second light source piece is installed the light source mounting panel orientation one side that the leaded light unit set up, the second light source piece is followed the length direction interval of light source mounting panel sets up.
In some optional embodiments, the second light source unit includes a first LED lamp and a second LED lamp that are independently controlled, and each of the first LED lamp and the second LED lamp is provided at intervals along a length direction of the light source mounting board.
In some optional embodiments, the backlight assembly further comprises a heat sink mounted on a side of the light source mounting board facing away from the light guide unit.
In some embodiments, the light guide unit includes a plurality of light guide bars disposed around the diffusion plate.
In some optional embodiments, the second light source assemblies are multiple, and the second light source assemblies are arranged in one-to-one correspondence with the light guide bars.
In some embodiments, the light guide unit has a light emitting surface, a reflecting surface and a light incident surface, the light emitting surface abuts against the diffusion plate, the reflecting surface faces the middle frame, and the light incident surface faces the first light source and the second light source assembly.
In some optional embodiments, the light-emitting surface is provided with a convex optical texture, and the reflecting surface is provided with a plurality of light-transmitting screen dots.
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.
The invention also discloses a liquid crystal display module which comprises the backlight assembly and the liquid crystal panel.
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 the light rays emitted by the first light source and the second light source assembly into the edge of the diffusion plate, the overlapping width of the diffusion plate and the middle frame can be reduced, the incident light of the edge of the diffusion plate is increased, and therefore the problem of uneven brightness of a bright frame, a dark frame and the like of the edge of the whole liquid crystal display module when a liquid crystal panel with a small BM width value is adopted is solved. In addition, the added second light source component can compensate the problem of insufficient brightness caused by the first light source, the brightness of the whole backlight component is ensured to be consistent, and the problem of dark edges of the liquid crystal panel due to overlap of the edges is well solved.
The liquid crystal display module of the invention, because of having the backlight assembly, better solves the problem that the brightness of the whole edge of the liquid crystal display module is uneven, such as bright and dark frames, when a liquid crystal panel with smaller BM width value is adopted, and better solves the problem of dark edges of the liquid crystal panel, which are generated by overlapping edges.
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 second light source module according to an embodiment of the invention.
Fig. 4 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;
2. a back plate; 21. a flat plate; 22. inserting and flanging;
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. a second light source assembly; 61. a light source mounting plate; 62. a second light source element; 621. a first LED lamp; 612. a second LED lamp;
7. a heat sink; 8. an optical film; 9. a liquid crystal panel; 10. a first 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.
A specific structure of the backlight assembly of the embodiment of the present invention is described below with reference to fig. 1 to 4.
As shown in fig. 1-4, the present invention discloses a backlight assembly, which includes a middle frame 1, a back plate 2, a diffusion plate 3, a reflective sheet 4, a light guide unit 5 and a second light source assembly 6, wherein the middle frame 1 is used for supporting a liquid crystal panel 9, the back plate 2 is fastened at the rear side of the middle frame 1, the diffusion plate 3 is lapped on the middle frame 1, the diffusion plate 3 is located between the liquid crystal panel 9 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, a first light source 10 is arranged between the reflective sheet 4 and the diffusion plate 3, the light guide unit 5 is lapped on the middle frame 1 and located between the middle frame 1 and the back plate 2, and the second light source assembly 6 is connected on the back plate 2 and located between the reflective sheet 4 and the back plate. A portion of the light guide unit 5 serves to guide the light of the first light source 10 to the diffuser 3, and another portion of the light guide unit 5 serves to guide the light of the second light source assembly 6 to the diffuser 3.
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 9 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, thereby being not beneficial to the narrow frame design of the liquid crystal display module. In addition, the backlight assembly of the prior art is provided with only one set of light source passing through the reflective sheet 4 on the back plate 2, and since this light source is far from the edge of the liquid crystal panel 9 and since the overlapping width of the diffusion plate 3 and the middle frame 1 is large, the light intensity of this light source irradiated onto the edge of the liquid crystal panel 9 is small, so that the dark-edge problem of the liquid crystal panel 9 occurs.
It can be understood that, in the backlight assembly of the present invention, since the light guide unit 5 is abutted against the diffusion plate 3, on one hand, the light guide unit 5 can support the diffusion plate 3, so as to reduce the overlapping width of the diffusion plate 3 and the middle frame 1, thereby increasing the incident light at the edge of the diffusion plate 3, and on the other hand, the light emitted by the first light source 10 and the second light source assembly 6 can illuminate the portion of the diffusion plate 3 abutted against the light guide unit 5 after being guided by the light guide unit 5, thereby further increasing the incident light at the edge of the diffusion plate 3. 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 9 with a smaller BM width value is adopted.
Meanwhile, because the second light source assembly 6 which is additionally arranged is arranged between the reflector plate 4 and the back plate 2, light rays emitted by the second light source assembly 6 can enter the light guide unit 5, and the problem of insufficient brightness caused by the first light source 10 can be solved by the second light source assembly 6. The brightness of the second light source assembly 6 can be dynamically adjusted to match the edge brightness difference of the liquid crystal panel 9 caused by different optical system parameters, so that the edge brightness of the whole liquid crystal panel 9 is ensured to be consistent, and the problem of dark edges caused by overlapping of the liquid crystal panel 9 is solved.
According to the backlight module, the light guide unit 5 is arranged between the diffusion plate 3 and the middle frame 1, the light guide unit 5 can guide light rays emitted by the first light source 10 and the second light source assembly 6 into the edge of the diffusion plate 3, the light guide unit 5 can also reduce the overlapping width of the diffusion plate 3 and the middle frame 1, and light incidence at the edge of the diffusion plate 3 is increased, so that the problem of uneven brightness of a bright frame, a dark frame and the like at the edge of the whole liquid crystal display module when the liquid crystal panel 9 with a small BM width value is adopted is solved. In addition, the added second light source assembly 6 can compensate the problem of insufficient brightness caused by the first light source 10, ensure the brightness of the whole backlight assembly to be consistent, and better solve the problem of dark edges generated by overlapping of the liquid crystal panel 9.
Optionally, the optical chromaticity parameters of the first light source 10 and the second light source assembly 6 are kept consistent, so as to ensure that the color system of the whole backlight assembly is consistent.
Optionally, the second light source assembly 6 and the first light source 10 can work independently, so that the functions of mutual control display prompting and prompting of the backlight assembly and the peripheral internet of things equipment are achieved, particularly, when the large display screen of the internet of things display terminal adopts the backlight assembly of the embodiment, the introduced second light source assembly 6 can achieve a good effect of rich AIOT (artificial intelligence internet of things), and the functions of mutual control display prompting and prompting of the large display screen and the peripheral internet of things equipment can be achieved. For example: and displaying in a large screen partition mode, displaying that the edge of the large screen has a horse race lamp effect, and displaying that the edge of the large screen flickers to remind the working state or task execution progress of other related interconnected equipment.
In some embodiments, as shown in fig. 2, the second light source assembly 6 includes a light source mounting plate 61 and second light source members 62, one end of the light source mounting plate 61 is connected to the back plate 2, and the other end is disposed toward the reflective sheet 4, the second light source members 62 are mounted on a side of the light source mounting plate 61 disposed toward the light guide unit 5, and the second light source members 62 are disposed at intervals along a length direction of the light source mounting plate 61.
It can be understood that, if the second light source unit 62 is directly mounted on the back panel 2, the heat generated by the second light source unit 62 during operation can cause the back panel 2 to be hot, which may affect the normal operation of the components of the back panel 2 in case of long-term heat generation. In addition, since the housing 2 is spaced from the light guide unit 5, the direct mounting of the second light source unit 62 on the housing 2 is not favorable for the light guide unit 5 to guide the light emitted from the second light source unit 62 to the diffuser 3. In the present embodiment, the second light source element 62 is mounted on the light source mounting board 61, which is not only beneficial to prevent the back plate 2 from overheating, but also beneficial to the light guide unit 5 to guide the light emitted from the second light source element 62 to the diffusion plate 3. In addition, in the actual installation process, the light source installation board 61 installed with the second light source elements 62 can be directly installed on the back plate 2 without sequentially installing a plurality of second light source elements 62 on the back plate 2, so that the assembly of the backlight assembly of the embodiment is simplified, and the assembly efficiency of the backlight assembly is improved.
In some alternative embodiments, as shown in fig. 3, the second light source unit 62 includes a first LED lamp 621 and a second LED lamp 612 that are independently controlled, and each of the first LED lamp 621 and the second LED lamp 612 is provided in plurality at intervals along the length direction of the light source mounting board 61. It is understood that the second light source unit 62 includes two types of LED lamps capable of being independently controlled, so that the edge of the liquid crystal panel 9 can have different display effects during the actual use of the backlight assembly of the present embodiment. It should be additionally noted that in this embodiment, the colors of the first LED lamp 621 and the second LED lamp 612 may be the same or different, and the colors of the first LED lamps 621 may be one color or multiple colors. The plurality of second LED lamps 612 may have one color or a plurality of colors. In addition, in other embodiments of the present invention, the arrangement or the type of the LED lamp can be selected according to actual needs by the second light source device 62.
In some alternative embodiments, as shown in fig. 2, the backlight assembly further includes a heat sink 7, and the heat sink 7 is mounted on a side of the light source mounting board 61 facing away from the light guide unit 5. It will be appreciated that the heat sink 7 can cool the heat-generating light source mounting board 61 well, thereby avoiding overheating inside the assembly of the back plate 2. In the present embodiment, the type, model and size of the heat sink 7 can be selected according to actual needs, and the above parameters of the heat sink 7 are not limited herein.
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, there are a plurality of second light source assemblies 6, and the second light source assemblies 6 are disposed in one-to-one correspondence with the light guide bars. 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. The brightness of the edge of the liquid crystal panel 9 can be ensured to be consistent in the actual use process, and the problem of dark edges caused by overlap of the liquid crystal panel 9 is well solved.
In some embodiments, as shown in fig. 4, 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 abutted against the diffusion plate 3, the reflecting surface 52 is disposed towards the middle frame 1, and the light incident surface 53 is disposed towards the first light source 10 and the second light source assembly 6. It can be understood that, when the light rays emitted by the first light source 10 and the second light source assembly 6 enter the light guide unit 5 from the light incident surface 53 and are emitted from the light emitting surface 51 after being reflected by the reflecting surface 52, the portion of the diffusion plate 3 abutting against the light guide unit 5 can be illuminated, so that the light guide effect of the light guide unit 5 on the light rays emitted by the first light source 10 and the second light source assembly 6 is ensured.
In some optional embodiments, as shown in fig. 4, the light emitting surface 51 is provided with a convex optical texture 511, and the reflecting surface 52 is provided with a plurality of light transmitting dots 521. 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, as shown in fig. 4, a plurality of light-transmitting dots 521 are disposed on the reflective surface 52. 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 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.
Optionally, a reflective film is bonded to the bottom wall of the light guide unit 5 to form the reflective surface 52, and an optical functional film is bonded to the reflective film. The side wall of the light guide unit 5 is fixed to the middle frame 1 with high strength to form another reflecting surface 52.
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 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 back plate 2 needs to be manufactured differently for different sizes of the liquid crystal panel 9, which reduces the compatibility of the backlight assembly with the liquid crystal panel 9. In the embodiment, only different middle frames 1 need to be replaced for different liquid crystal panels 9, 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 embodiments, as shown in fig. 2, an optical film 8 is disposed on a sidewall of the diffuser plate 3 facing the liquid crystal panel 9, and the optical film 8 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.
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 9 abuts on the first supporting step 11, the diffusion plate 3 abuts on the second supporting step 12, and the light guiding unit 5 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 9, the second supporting step 12 and the light guide unit 5 jointly support the diffusion plate 3, and the third supporting step 13 supports the light guide unit 5, so that the stability of the liquid crystal panel 9, the diffusion plate 3, the light guide unit 5 and the reflector plate 4 is better ensured, and the display problem caused by the fact that the liquid crystal panel 9, the diffusion plate 3, the light guide unit 5 and the reflector plate 4 are inclined in the carrying and transporting processes is avoided.
The specific structure of the liquid crystal display module according to the embodiment of the invention is described below with reference to fig. 1 to 2.
The invention also discloses a liquid crystal display module which comprises the backlight component and the liquid crystal panel 9.
The liquid crystal display module of the invention, because of having the backlight assembly of the aforesaid, solve the problem that the edge of the whole liquid crystal display module will appear bright dark frame, etc. and luminance is uneven when adopting the liquid crystal faceplate 9 with smaller BM width value well, and solved the dark edge problem that the liquid crystal faceplate 9 produces because of the overlap edge is overlapped well.
Example (b):
as shown in fig. 1 to 4, the liquid crystal display module of the present embodiment includes a backlight assembly and a liquid crystal panel 9 fitted on the backlight assembly.
As shown in fig. 2, the backlight assembly includes a middle frame 1, a back plate 2, a diffusion plate 3, a reflective sheet 4, a light guide unit 5, a second light source assembly 6, a heat sink 7, and an optical film 8, wherein the middle frame 1 has 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 further provided with an insertion groove 14. The liquid crystal panel 9 is bonded to the first supporting step 11 by foam adhesive. The back plate 2 comprises a plane plate 21 and an inserting flange 22, the inserting flange 22 is arranged around the plane plate 21, the inserting flange 22 is inserted into the inserting groove 14 of the middle frame 1, and the inserting flange 22 is connected with the third supporting step 13 through a connecting piece.
The diffusion plate 3 is located between the liquid crystal panel 9 and the back plate 2 and is lapped on the second supporting step 12, and the light guide unit 5 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 light incident surface 53 is disposed toward the first light source 10 and the second light source element 62. The optical film 8 is provided on the side wall of the diffuser plate 3 facing the liquid crystal panel 9.
The second light source assembly 6 includes a light source mounting plate 61 and a second light source element 62, one end of the light source mounting plate 61 is connected with the back plate 2, the other end is arranged towards the reflector plate 4, the second light source element 62 is arranged on one side of the light source mounting plate 61 arranged towards the light guide unit 5, and the second light source element 62 is arranged along the length direction of the light source mounting plate 61 at intervals. The second light source unit 62 includes a first LED lamp 621 and a second LED lamp 612 that are independently controlled, and the first LED lamp 621 and the second LED lamp 612 are both provided at intervals along the length direction of the light source mounting board 61. The heat sink 7 is mounted on a side of the light source mounting board 61 facing away from the light guide unit 5.
The liquid crystal display module of the embodiment has the following advantages:
firstly, the method comprises the following steps: different from the traditional direct type back plate 2 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 back plate 2 structure, the diffusion plate 3 of the embodiment is not directly placed on the folded edge of the back plate 2, but the light guide unit 5 is added on the middle frame 1, the light guide unit 5 increases the incident light of the edge of the diffusion plate 3, and the problem of uneven brightness of a bright frame and a dark frame and the like on the edge when the traditional liquid crystal module is applied to a liquid crystal panel 9 with a smaller width value is well solved;
thirdly, the method comprises the following steps: the middle frame 1 and the back plate 2 are locked inside the back plate 2 by adopting a connecting piece, 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;
fourthly: the brightness of the second light source component 6 can be dynamically adjusted to match the edge brightness difference of the liquid crystal panel 9 caused by different optical system parameters, so that the edge brightness of the whole liquid crystal display module is ensured to be consistent, and the problem of dark edges caused by overlapping of the liquid crystal display module is solved;
fifth, the method comprises the following steps: but second light source subassembly 6 and first light source 10 autonomous working realize that the interconnection of liquid crystal display module assembly and peripheral thing networking equipment is controlled each other and is shown suggestion and warning function to user experience sense and user's viscosity have been promoted.
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 (9);
the back plate (2), the back plate (2) is buckled at the rear side of the middle frame (1);
the diffusion plate (3) is lapped on the middle frame (1), and the diffusion plate (3) is positioned between the liquid crystal panel (9) and the back plate (2);
the reflection sheet (4) is lapped on the middle frame (1), the reflection sheet (4) is located between the diffusion plate (3) and the back plate (2), and a first light source (10) is arranged between the reflection sheet (4) and the diffusion plate (3);
the light guide unit (5) is lapped on the middle frame (1) and is positioned between the middle frame (1) and the back plate (2);
the second light source assembly (6), the second light source assembly (6) is connected to the back plate (2) and is positioned between the reflector plate (4) and the back plate (2); wherein:
one part of the light guide unit (5) is used for guiding the light of the first light source (10) to the diffusion plate (3), and the other part of the light guide unit (5) is used for guiding the light of the second light source assembly (6) to the diffusion plate (3).
2. The backlight assembly according to claim 1, wherein the second light source assembly (6) comprises:
the light source mounting plate (61), one end of the light source mounting plate (61) is connected with the back plate (2), and the other end of the light source mounting plate is arranged towards the reflector plate (4);
the second light source part (62), second light source part (62) are installed light source mounting panel (61) is towards one side that light guide unit (5) set up, second light source part (62) follow the length direction interval setting of light source mounting panel (61).
3. The backlight assembly of claim 2, wherein the second light source unit (62) comprises a first LED lamp (621) and a second LED lamp (622) which are independently controlled, and each of the first LED lamp (621) and the second LED lamp (622) is provided in plurality at intervals along a length direction of the light source mounting board (61).
4. The backlight assembly according to claim 2, further comprising a heat sink (7), wherein the heat sink (7) is mounted on a side of the light source mounting board (61) facing away from the light guide unit (5).
5. 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).
6. The backlight assembly according to claim 5, wherein the second light source assembly (6) is provided in plurality, and the second light source assemblies (6) are disposed in one-to-one correspondence with the light guide bars.
7. The backlight assembly of claim 1, 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 light incident surface (53) is disposed towards the first light source (10) and the second light source assembly (6).
8. The backlight assembly as claimed in claim 7, wherein the light emitting surface (51) is provided with a plurality of convex optical patterns (511), and the reflecting surface (52) is provided with a plurality of light-transmitting dots (521).
9. 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).
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 (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760634.2A CN111880337A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010760634.2A CN111880337A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
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| Publication Number | Publication Date |
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| CN111880337A true CN111880337A (en) | 2020-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010760634.2A Pending CN111880337A (en) | 2020-07-31 | 2020-07-31 | Backlight assembly and liquid crystal display module |
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