CN115728992A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN115728992A CN115728992A CN202211506250.3A CN202211506250A CN115728992A CN 115728992 A CN115728992 A CN 115728992A CN 202211506250 A CN202211506250 A CN 202211506250A CN 115728992 A CN115728992 A CN 115728992A
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Abstract
The invention discloses a backlight module and a display device, wherein the backlight module comprises a back plate, a reflecting structure, a mounting plate and a light source component, wherein the reflecting structure is arranged on one side of the back plate close to a light source of the backlight module, and the reflecting structure forms a reflecting cavity with an opening back to the back plate; the mounting plate is transparent and is covered on the opening of the reflecting cavity; the light source component comprises a lamp bead, and the lamp bead is arranged on one side of the mounting plate, which faces the reflection cavity, and is used for emitting light and irradiating the inner wall of the reflection cavity. The mounting plate is covered and is established reflection configuration and establish corresponding lamp pearl with the reflection cavity cover, form confined luminous region, so, the light of two adjacent luminous regions does not interfere each other, the light of lamp pearl reflects and spreads through the mounting panel through the internal face of reflection cavity, solve the problem that straight following formula backlight unit lamp pearl light is crosstalked each other, and have longer optical path and better mixed light effect under the same mixed light distance, acquire even area source, make the display device who uses backlight unit have the high contrast picture.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a backlight module and a display device.
Background
At present, LED display technology wide application is in display device, along with the rapid development of LED display technology, the consumer also is higher and higher to display device's luminance, contrast, colour gamut etc. requirement, liquid crystal display module is display device's important component, liquid crystal display module comprises liquid crystal display panel and backlight unit, according to the light source position, backlight unit mainly divide into straight following formula and side income formula two kinds, straight following formula adopts matrix LED lamp pearl, because the mutual crosstalk of the light that adjacent LED lamp pearl sent, can't reach the high contrast effect.
Disclosure of Invention
The invention mainly aims to provide a backlight module and a display device, and aims to solve the problem of mutual crosstalk of lamplight of lamp beads in a direct type backlight module.
To achieve the above object, the present invention provides a backlight module, including:
a back plate;
the reflecting structure is arranged on one side of the back plate close to the light source of the backlight module, and a reflecting cavity with an opening back to the back plate is formed in the reflecting structure;
the mounting plate is arranged in a transparent mode and covers the opening of the reflection cavity; and the number of the first and second groups,
the light source assembly comprises a lamp bead, wherein the lamp bead is arranged on one side of the reflection cavity, and the mounting plate faces the one side of the reflection cavity and is used for emitting light and irradiating the light onto the inner wall of the reflection cavity.
Optionally, the cross section of the reflection cavity is gradually reduced from the direction close to the mounting plate to the direction far away from the mounting plate; and/or the presence of a gas in the gas,
the inner wall surface of the reflection cavity comprises a plurality of reflection planes which are connected with each other; and/or the presence of a gas in the gas,
a reflective coating is arranged on the inner wall surface of the reflective cavity; and/or the presence of a gas in the gas,
the opening section of the reflecting cavity is a regular polygon.
Optionally, the reflection cavity and the lamp beads are correspondingly arranged to form a plurality of reflection light groups, and the reflection light groups are arranged in an array.
Optionally, in one of the reflective light groups, a projection of the lamp bead in a vertical plane coincides with a projection center of the reflective cavity in the vertical plane; alternatively, the first and second electrodes may be,
in one reflected light group, a plurality of lamp beads are arranged at intervals along the circumferential direction to form a layout pattern, and the projection of the layout pattern in a vertical plane is superposed with the projection center of the reflection cavity in the vertical plane.
Optionally, a copper film is arranged on one side of the mounting plate, which is away from the reflecting structure, and is used for electrically connecting the lamp beads; and/or the presence of a gas in the atmosphere,
one side of the mounting plate, which deviates from the reflection structure, is formed with a dimming area, and a reflection coating is correspondingly arranged in the dimming area.
Optionally, the light source assembly further comprises:
the cover plate is covered on the chip of the lamp bead; and (c) a second step of,
the diffusion part comprises a light-transmitting support, and the light-transmitting support is arranged between the mounting plate and the chip of the lamp bead.
Optionally, the diffusion part further includes a diffusion adhesive provided on the light-transmitting holder.
Optionally, the reflective structure is integrally injection molded; and/or the presence of a gas in the gas,
the material of the reflecting structure comprises plastic; and/or the presence of a gas in the gas,
the mounting plate is made of transparent inorganic glass.
Optionally, the periphery of the back plate is provided with a first lap joint part;
the circumference of the reflection structure forms a second lap joint part, the second lap joint part is abutted against the first lap joint part, and the periphery of the mounting plate is abutted against the second lap joint part.
The invention also provides a display device, which comprises a backlight module, wherein the backlight module comprises:
a back plate;
the reflecting structure is arranged on one side of the back plate close to the light source of the backlight module, and a reflecting cavity with an opening back to the back plate is formed in the reflecting structure;
the mounting plate is arranged in a transparent mode and covers the opening of the reflection cavity; and the number of the first and second groups,
the light source assembly comprises a lamp bead, wherein the lamp bead is arranged on one side of the reflection cavity, and the mounting plate faces the one side of the reflection cavity and is used for emitting light and irradiating the light onto the inner wall of the reflection cavity.
In the technical scheme of the invention, the backlight module comprises a back plate, a reflecting structure, a mounting plate and a light source assembly, wherein the reflecting structure is arranged on one side of the back plate close to a light source of the backlight module, and a reflecting cavity with an opening back to the back plate is formed on the reflecting structure; the mounting plate is transparent and is covered on the opening of the reflection cavity; the light source component comprises a lamp bead, wherein the lamp bead is arranged on one side of the reflection cavity body, which faces the mounting plate, and is used for emitting light and irradiating the light onto the inner wall of the reflection cavity body. The reflection structure is provided with the reflection cavity, the mounting plate faces one side of the reflection cavity is provided with the lamp beads, the mounting plate covers the reflection structure during installation, so that the reflection cavity covers the lamp beads to form a closed light-emitting area, light of two adjacent light-emitting areas does not interfere with each other, the light of the lamp beads is reflected by the inner wall surface of the reflection cavity correspondingly, the light is transmitted out by the mounting plate, the problem of mutual crosstalk of the light of the direct type backlight module lamp beads is solved, and under the same light mixing distance, a longer optical path and a better light mixing effect are achieved, an even surface light source is obtained, and the display device of the backlight module has a high-contrast picture.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic exploded view of a backlight module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the reflective structure of FIG. 1;
FIG. 3 is a schematic view of the assembly of the cover plate and the light-transmissive support;
FIG. 4 is a schematic view of the cover plate and the transparent bracket of FIG. 3 from another perspective;
FIG. 5 is a schematic structural diagram of the back plate of FIG. 1;
fig. 6 is a partially enlarged view of a portion a in fig. 5.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
At present, LED display technology wide application is in display device, along with the rapid development of LED display technology, the consumer also is higher and higher to display device's luminance, contrast, colour gamut etc. requirement, liquid crystal display module is display device's important component, liquid crystal display module comprises liquid crystal display panel and backlight unit, according to the light source position, backlight unit mainly divide into straight following formula and side income formula two kinds, straight following formula adopts matrix LED lamp pearl, because the mutual crosstalk of the light that adjacent LED lamp pearl sent, can't reach the high contrast effect.
In view of this, the present invention provides a backlight module, wherein the installation plate is covered on the reflection structure during installation, so that the reflection cavity is covered with the corresponding lamp beads to form a closed light-emitting region, and thus, light rays of two adjacent light-emitting regions do not interfere with each other, the light rays of the lamp beads are reflected by the inner wall surface of the corresponding reflection cavity and are transmitted out through the installation plate, thereby solving the problem of mutual crosstalk of the light rays of the lamp beads of the direct type backlight module, and under the same light mixing distance, the backlight module has a longer optical path and a better light mixing effect, and a uniform surface light source is obtained, so that a display device using the backlight module has a high-contrast picture. Fig. 1 to 6 show an embodiment of a backlight module according to the present invention.
As shown in fig. 1, the backlight module 100 provided by the present invention includes a back plate 1, a reflective structure 2, a mounting plate 3 and a light source assembly 4, wherein the reflective structure 2 is disposed in front of the back plate 1, and the reflective structure 2 is formed with a reflective cavity 21 opening forward; the mounting plate 3 is transparent, and the mounting plate 3 covers the opening of the reflection cavity 21; light source subassembly 4 includes lamp pearl 41, lamp pearl 41 is located mounting panel 3 orientation one side of reflection cavity 21 for send light and shine to on the inner wall of reflection cavity 21.
In the technical scheme of the invention, the backlight module 100 comprises a back plate 1, a reflecting structure 2, a mounting plate 3 and a light source assembly 4, wherein the reflecting structure 2 is arranged on one side of the back plate 1 close to a light source of the backlight module, and the reflecting structure 2 is provided with a reflecting cavity 21 with an opening back to the back plate 1; the mounting plate 3 is transparent, and the mounting plate 3 covers the opening of the reflection cavity 21; light source subassembly 4 includes lamp pearl 41, lamp pearl 41 is located mounting panel 3 orientation one side of reflection cavity 21 for send light and shine to on the inner wall of reflection cavity 21. Set up on reflection configuration 2 reflection cavity 21, and mounting panel 3 orientation one side of reflection cavity 21 sets up lamp pearl 41, will during the installation mounting panel 3 lid is established reflection configuration 2, so that reflection cavity 21 covers establishes the correspondence lamp pearl 41 forms the confined light-emitting region, and so, the light of two adjacent light-emitting regions does not interfere each other, lamp pearl 41's light is through corresponding reflection cavity 21's internal face is reflected, and the warp mounting panel 3 spreads, solves the problem of direct type backlight module 100 lamp pearl 41's light mutual crosstalk, and under the same mixed light distance, has longer optical path and better mixed light effect, acquires even area source, so that use backlight module 100's display device has the high contrast picture.
The reflecting cavity 21 is covered with the corresponding lamp beads 41 to form a closed light emitting area, and the lamp light is reflected by the inner wall surface of the corresponding reflecting cavity and is transmitted out. In the present embodiment, the cross section of the reflective cavity 21 is gradually reduced from the direction close to the mounting plate 3 to the direction away from the mounting plate 3; the specific structure of the reflection cavity is not limited as long as the reflection of the light can be realized, and the reflection cavity can be a cone or a regular prism, so that the reflection cavity 21 has a good reflection effect. The inner wall surface of the reflection cavity 21 comprises a plurality of reflection planes which are connected with each other; the inner wall surface of the reflecting cavity 21 includes a plurality of reflecting planes connected to each other, so that a uniform surface light source can be obtained by reflecting through the plurality of reflecting planes. A reflective coating is arranged on the inner wall surface of the reflective cavity 21; by coating the reflective coating on the inner wall surface of the reflective cavity 21, the reflective effect of the reflective cavity 21 can be improved. The opening section of the reflecting cavity 21 is a regular polygon; thus, the reflective cavity 21 has a plurality of reflective surfaces, so that the backlight module 100 forms a uniform surface light source. It should be noted that the four technical features may be set alternatively, or may be combined according to actual needs.
Specifically, in this embodiment, as shown in fig. 1, the reflective cavity 21 and the lamp beads 41 are correspondingly arranged as a reflective light group, and the reflective light groups are arranged in a plurality and arranged in an array. The reflecting cavity 21 is covered with the corresponding lamp beads 41 to form the reflecting light groups, and the reflecting light groups form a closed light-emitting region, so that the light rays of two adjacent reflecting light groups do not interfere with each other, and the problems of mutual crosstalk and halation of the light rays of the lamp beads 41 of the direct-type backlight module 100 are solved; the plurality of reflective light groups are arranged, so that the backlight module 100 has a good light emitting effect, and the connection mode of the control circuit between the reflective light groups can be determined according to the control requirement, thereby realizing the independent control of the required number of reflective light groups.
The reflecting cavity 21 is covered with the corresponding lamp beads 41 to form the reflecting light set, and the specific number of the lamp beads 41 in each reflecting cavity 21 is not limited, and may be one or multiple. In this embodiment, in one of the reflective light groups, the projection of the lamp bead 41 in the vertical plane coincides with the center of the projection of the reflective cavity 21 in the vertical plane. The reflection light group is provided with one lamp bead 41, and the projection of the lamp bead 41 in the vertical plane is coincided with the projection center of the reflection cavity 21 in the vertical plane, so that the symmetry of light in the reflection cavity 21 is guaranteed, the light of the lamp bead 41 is uniformly irradiated on the inner wall surface of the reflection cavity 21, and the reflection effect of the reflection cavity 21 is guaranteed. In another embodiment, in one of the reflective light groups, a plurality of the light beads 41 are arranged, and the plurality of the light beads 41 are arranged at intervals along the circumferential direction to form a layout pattern, and a projection of the layout pattern in a vertical plane coincides with a projection center of the reflective cavity 21 in the vertical plane. And arranging a plurality of lamp beads 41 in the reflected light group, wherein the plurality of lamp beads 41 are arranged at intervals along the circumferential direction to form a layout pattern, and the projection of the layout pattern in a vertical plane is coincided with the projection center of the reflection cavity 21 in the vertical plane. Therefore, the symmetry of light rays in the reflection cavity 21 can be ensured, the inner wall surface of the reflection cavity 21 can be uniformly illuminated, the light reflection effect of the reflection cavity 21 is improved, and the brightness of reflected light of the reflected light group can be improved by arranging the plurality of lamp beads 41 in one reflected light group, so that the backlight module 100 has a better light emitting effect. It should be noted that, in the present application, the lamp beads 41 are LEDs (Light Emitting diodes), and a plurality of the lamp beads 41 are disposed in one of the reflective Light groups, that is, when one of the reflective Light groups has a plurality of LED chips, the Light Emitting color of each LED chip is selected according to the design requirement, and may be any one of blue Light, violet Light, red Light, and green Light. The LED can be selected from 100um-300um LED chips, and can also be selected from conventional LED chips larger than 300 um.
In one embodiment, a copper film is disposed on a side of the mounting plate 3 away from the reflective structure 2, so as to electrically connect the lamp beads 41; in another embodiment, a dimming area is formed on a side of the mounting plate 3 away from the reflective structure 2, and a reflective coating is correspondingly disposed in the dimming area; in another embodiment, a copper film is disposed on a side of the mounting plate 3 away from the reflective structure 2 for electrically connecting the lamp beads 41, and a dimming area is formed on a side of the mounting plate 3 away from the reflective structure 2, and a reflective coating is disposed in the dimming area. Specifically, in this embodiment, mounting panel 3 deviates from one side of reflective structure 2 is equipped with the copper film, is used for the electricity to connect lamp pearl 41, just mounting panel 3 deviates from one side of reflective structure 2 is formed with the district of adjusting luminance, corresponds be equipped with reflective coating in the district of adjusting luminance. The copper film is arranged on one side, away from the reflecting structure 2, of the mounting plate 3, so that the lamp beads 41 are communicated with an external power supply and the heat dissipation electricity requirement is met, wherein the copper film can be formed by deposition through a PVD (physical vapor deposition) coating technology; the position with larger brightness on the mounting plate 3 is provided with the light adjusting area to adjust the light outlet effect at the position, thereby obtaining an ideal uniform surface light source.
In this embodiment, as shown in fig. 3 and 4, the light source assembly 4 further includes a cover plate 42 and a diffusion portion 43, and the cover plate 42 is covered on the chip of the lamp bead 41; the diffusion portion 43 includes a light-transmitting support 431, and the light-transmitting support 431 is provided on the chips of the mounting board 3 and the lamp bead 41. The cover plate 42 is arranged between the mounting plate 3 and the chip of the lamp bead 41, so that the light transmission is reduced, the light diffusivity is improved, and the phenomenon of poor visual effect such as lamp images is improved; the light-transmitting bracket 431 is provided to realize the bottom light control of the lamp bead 41.
Further, in this embodiment, as shown in fig. 3 and 4, the diffusion portion 43 further includes a diffusion adhesive provided on the light-transmitting holder 431. The diffusion glue 432 covers the upper end of the light-transmitting support 431, so that the light-transmitting support 431 and the diffusion glue 432 enclose to form a sealed space to protect the chip of the lamp bead 41. The design is glued to the protruding cup of diffusion 432 accessible point to further open the luminous angle of lamp pearl 41 promotes lamp pearl 41 interval reduces lamp pearl 41 quantity, practices thrift the cost, helps improving production efficiency simultaneously. In this embodiment, the diffusion glue 432 is provided with a light control plate 44, and the light control plate 44 is located on a side of the diffusion glue 432 opposite to the light-transmitting bracket 431. The light control plate 44 is used for adjusting the brightness of the light rays emitted from the lamp beads 41 toward the reflecting structure 2.
In the present embodiment, the reflective structure 2 is integrally injection molded; the reflecting structure 2 is processed through integral injection molding, so that the production efficiency of the reflecting structure 2 is improved, and the quality consistency of the reflecting structure 2 in batch production is improved. The material of the reflecting structure 2 comprises plastic; the specific type of the plastic used for the reflection structure 2 is not limited, and may be ABS plastic (Acrylonitrile Butadiene Styrene), acrylic, or polycarbonate (PC plastic), the reflection structure 2 is made of plastic, and is easy to be injection molded, and the injection mold is subjected to highlight treatment, so that the inner wall surface of the reflection cavity 21 obtained by injection molding is a highlight surface, and the reflectivity of the inner wall surface of the reflection cavity 21 is further improved; the material of the mounting plate 3 comprises transparent inorganic glass. The transparent inorganic glass has the advantages of high temperature resistance, aging resistance, high strength and the like. The three technical features may be set alternatively, or may be combined according to actual needs.
In the backlight module 100, the reflective structure 2 is disposed in front of the back plate 1, and the mounting plate 3 covers an opening of the reflective cavity 21 of the reflective structure 2. Specifically, in the present embodiment, as shown in fig. 1 and 2, the periphery of the back plate 1 is provided with a first bridging portion 11 (see fig. 5 and 6); the circumferential direction of the reflection structure 2 forms a second lap 22, the second lap 22 abuts against the first lap 11, and the peripheral edge of the mounting plate 3 abuts against the second lap 22. During installation, the second overlapping part 22 abuts against the first overlapping part 11 to limit the installation of the reflection structure 2, and the periphery of the installation plate 3 abuts against the second overlapping part 22, so that the back plate 1, the reflection structure 2 and the installation plate 3 are sequentially stacked. It should be noted that, in the present application, the backlight module 100 further includes an optical brightness enhancement film 6 and a diffusion plate 5 sequentially stacked along the front-back direction, and the diffusion plate 5 is covered on one side of the mounting board 3 departing from the reflection structure 2.
The invention further provides a display device, which includes a backlight module 100, and the specific structure of the backlight module 100 is as shown in fig. 1 with reference to the above embodiment. It can be understood that, since the display device according to the present invention adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not described in detail herein.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A backlight module, comprising:
a back plate;
the reflecting structure is arranged on one side of the back plate close to the light source of the backlight module, and a reflecting cavity with an opening back to the back plate is formed in the reflecting structure;
the mounting plate is transparent and is covered on the opening of the reflecting cavity; and the number of the first and second groups,
the light source assembly comprises a lamp bead, wherein the lamp bead is arranged on one side of the reflection cavity body, and the mounting plate faces towards one side of the reflection cavity body to emit light and irradiate towards the inner wall of the reflection cavity body.
2. The backlight module of claim 1, wherein the reflective cavity has a gradually decreasing cross-section from the position near the mounting board to the position far from the mounting board; and/or the presence of a gas in the gas,
the inner wall surface of the reflection cavity comprises a plurality of reflection planes which are connected with each other; and/or the presence of a gas in the atmosphere,
a reflective coating is arranged on the inner wall surface of the reflective cavity; and/or the presence of a gas in the gas,
the opening section of the reflecting cavity is a regular polygon.
3. The backlight module as claimed in claim 1, wherein the reflective cavity and the lamp beads are arranged as a plurality of reflective light groups, and the reflective light groups are arranged in an array.
4. The backlight module according to claim 3, wherein in one of the reflective light groups, a projection of the lamp bead in the vertical plane coincides with a center of a projection of the reflective cavity in the vertical plane; alternatively, the first and second liquid crystal display panels may be,
in one reflected light group, a plurality of lamp beads are arranged at intervals along the circumferential direction to form a layout pattern, and the projection of the layout pattern in a vertical plane is superposed with the projection center of the reflection cavity in the vertical plane.
5. The backlight module according to claim 1, wherein a copper film is disposed on a side of the mounting board facing away from the reflective structure for electrically connecting the lamp beads; and/or the presence of a gas in the gas,
one side of the mounting plate, which deviates from the reflection structure, is formed with a dimming area, and a reflection coating is correspondingly arranged in the dimming area.
6. The backlight module of claim 1, wherein the light source assembly further comprises:
the cover plate is covered on the chip of the lamp bead; and the number of the first and second groups,
the diffusion part comprises a light-transmitting support, and the light-transmitting support is arranged between the mounting plate and the chip of the lamp bead.
7. The backlight module according to claim 6, wherein the diffuser further comprises a diffusion paste disposed on the light-transmissive support.
8. The backlight module according to claim 1, wherein the reflective structure is integrally injection molded; and/or the presence of a gas in the gas,
the material of the reflecting structure comprises plastic; and/or the presence of a gas in the atmosphere,
the mounting plate is made of transparent inorganic glass.
9. The backlight module as claimed in claim 1, wherein the back plate is provided at a peripheral edge thereof with a first overlapping portion;
the circumference of the reflection structure forms a second lap joint part, the second lap joint part is abutted against the first lap joint part, and the periphery of the mounting plate is abutted against the second lap joint part.
10. A display device comprising the backlight module according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211506250.3A CN115728992A (en) | 2022-11-24 | 2022-11-24 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211506250.3A CN115728992A (en) | 2022-11-24 | 2022-11-24 | Backlight module and display device |
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| CN115728992A true CN115728992A (en) | 2023-03-03 |
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| CN202211506250.3A Pending CN115728992A (en) | 2022-11-24 | 2022-11-24 | Backlight module and display device |
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| CN111913320A (en) * | 2019-05-09 | 2020-11-10 | 北京易美新创科技有限公司 | Backlight module and display device |
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2022
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