CN220085205U - Vehicle-mounted backlight module and vehicle-mounted display device for preventing diaphragm from loosening and abnormal sound - Google Patents
Vehicle-mounted backlight module and vehicle-mounted display device for preventing diaphragm from loosening and abnormal sound Download PDFInfo
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- CN220085205U CN220085205U CN202321630276.9U CN202321630276U CN220085205U CN 220085205 U CN220085205 U CN 220085205U CN 202321630276 U CN202321630276 U CN 202321630276U CN 220085205 U CN220085205 U CN 220085205U
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- 230000002159 abnormal effect Effects 0.000 title claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 238000009792 diffusion process Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000010408 film Substances 0.000 description 26
- 239000012788 optical film Substances 0.000 description 21
- 239000002390 adhesive tape Substances 0.000 description 3
- 229920001821 foam rubber Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model provides a vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound, which comprises a lower frame, a reflecting film, a light guide plate and an optical diaphragm, wherein the reflecting film is arranged in the lower frame, the light guide plate is arranged on the reflecting film, a first positioning column and a second positioning column are fixedly connected to a bottom plate of the lower frame, the first positioning column and the second positioning column are arranged at intervals along the length direction of the light inlet side of the light guide plate, the optical diaphragm is provided with a first positioning groove and a second positioning groove, and the first positioning column is matched with the first positioning groove, and the second positioning column is matched with the second positioning groove to position the optical diaphragm. The vehicle-mounted backlight module for preventing the diaphragm from loosening abnormal sound can solve the problems of abnormal sound and bright edges of the diaphragm, improve the product quality and prolong the service life. The utility model also relates to a vehicle-mounted display device.
Description
Technical Field
The utility model relates to the technical field of display screens, in particular to a vehicle-mounted backlight module capable of preventing diaphragm loosening and abnormal sound and a vehicle-mounted display device.
Background
In recent years, along with the continuous improvement of people on driving safety consciousness, a vehicle-mounted display screen is rapidly developed in the field of automobile electronics, can provide real-time monitoring display of the environment outside a carriage for drivers and passengers, provides guarantee for safe driving, becomes one of necessary equipment for traffic safety, has higher and higher quality requirements on the vehicle-mounted display screen by automobile manufacturers, and also has higher requirements on visual effects of the vehicle-mounted display screen.
Traditional on-vehicle backlight includes lower frame, reflectance coating, light guide plate and optics diaphragm, and the reflectance coating sets up in the lower frame, and the light guide plate sets up on the reflectance coating, and the light guide plate is equipped with the boss, and optics diaphragm is equipped with the recess that corresponds the setting with the boss, and boss and recess cooperation are fixed a position optics diaphragm, because the boss sets up on the light guide plate for distance between boss and the window district only 2.8mm, under the circumstances that the duplex screen is prevalent, the phenomenon of diaphragm abnormal sound not only appears easily, and the bright limit phenomenon is appeared to 2.8 mm's interval messenger boss easily.
Disclosure of Invention
Therefore, the utility model aims to provide a vehicle-mounted backlight module capable of preventing diaphragm loosening and abnormal sound, which can solve the problems of diaphragm abnormal sound and bright edges, improve product quality and prolong service life.
The utility model provides a vehicle-mounted backlight module capable of preventing diaphragm loosening and abnormal sound, which comprises a lower frame, a reflecting film, a light guide plate and an optical diaphragm, wherein the reflecting film is arranged in the lower frame, the light guide plate is arranged on the reflecting film, a first positioning column and a second positioning column are fixedly connected to a bottom plate of the lower frame, the first positioning column and the second positioning column are arranged at intervals along the length direction of the light inlet side of the light guide plate, the optical diaphragm is provided with a first positioning groove and a second positioning groove, and the first positioning column is matched with the first positioning groove, and the second positioning column is matched with the second positioning groove to position the optical diaphragm.
In an embodiment, the optical film includes a first side, a second side, and a third side and a fourth side, where the first side is located on the light incident side, the first positioning groove is formed by recessing the third side toward a direction close to the fourth side, and the second positioning groove is formed by recessing the fourth side toward a direction close to the third side.
In one embodiment, a first gap is formed between the side wall of the first positioning column and the groove wall of the first positioning groove in the Y direction, and the first gap is 0.1-0.3 mm; the side wall of the second positioning column and the groove wall of the second positioning groove are provided with a second gap in the Y direction, and the second gap is 0.1-0.3 mm.
In an embodiment, the second side, the third side and the fourth side are respectively provided with a plurality of protrusions, the side frame of the lower frame is provided with a plurality of fixing grooves corresponding to the protrusions, and each protrusion is respectively and fixedly connected in the fixing groove to fixedly connect the optical film to the lower frame.
In an embodiment, the first side is towards the direction of second side is sunken to form and dodges the groove, prevent that the not hard up abnormal sound of diaphragm on-vehicle backlight unit still includes the lamp strip, lamp strip fixed connection in the inner wall of side frame, the lamp strip sets up dodge the inslot.
In one embodiment, the width or inner diameter of the first positioning column gradually increases in a direction away from the bottom plate; the width or the inner diameter of the second positioning column gradually increases towards the direction away from the bottom plate.
In an embodiment, the first positioning column and the second positioning column respectively include a first positioning portion and a second positioning portion that are fixedly connected, one end of the first positioning portion is fixedly connected to the bottom plate, the other end of the first positioning portion is fixedly connected to the second positioning portion, and the width or the outer diameter of the second positioning portion is greater than the width or the outer diameter of the first positioning portion.
In an embodiment, the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound comprises a window area, and the distance between the positioning column and the window area is 4.5 mm-5.5 mm; the distance between the second positioning column and the window area is 4.5 mm-5.5 mm.
In one embodiment, the optical film includes a diffusion film, a brightness enhancement film, and a brightness enhancement film, wherein the diffusion film is disposed on the light guide plate, the brightness enhancement film is disposed on the diffusion film, and the brightness enhancement film is disposed on the brightness enhancement film.
The utility model also relates to a vehicle-mounted display device which comprises the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound.
According to the vehicle-mounted backlight module, the first positioning column and the second positioning column are arranged on the bottom plate of the lower frame, the optical film is respectively arranged in the first positioning groove corresponding to the first positioning column and the second positioning groove corresponding to the second positioning column, the first positioning column and the first positioning groove and the second positioning column and the second positioning groove are matched, abnormal sound phenomenon of the optical film in the normal use or signal tolerance test process can be avoided, in addition, the first positioning column and the second positioning column are arranged on the bottom plate, the distance between the optical film and a window area can be increased, bright edges of the optical film can be avoided, the quality of products is improved, the service life of the vehicle-mounted backlight module is prolonged, and the use experience of customers is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a partially disassembled structure of a portion of a vehicle-mounted backlight module according to a first embodiment of the present utility model;
fig. 2 is a schematic top view of a vehicle-mounted backlight module according to a first embodiment of the present utility model;
FIG. 3 is a schematic view of a partial enlarged structure at A in FIG. 2;
FIG. 4 is a schematic view of a partially enlarged structure at B in FIG. 2;
FIG. 5 is a schematic view of a partially enlarged structure at C in FIG. 2;
fig. 6 is a schematic cross-sectional view of a vehicle-mounted backlight module according to a first embodiment of the present utility model;
fig. 7 is a schematic diagram of a split structure of a vehicle-mounted backlight module according to a first embodiment of the utility model;
reference numerals illustrate: a first positioning groove-101; a first groove wall-1011; second slot wall-1012; a third slot wall-1013; a second positioning groove-102; fourth slot wall-1021; fifth groove wall-1022; sixth slot wall-1023; a third positioning groove-103; seventh groove wall-1031; eighth slot wall-1032; ninth groove wall-1033; avoidance slot-104; a lower frame-11; a bottom plate-111; side frames-112; a first positioning column-113; a first sidewall-1131; a second sidewall-1132; a third sidewall-1133; a second positioning post-114; fourth side wall-1141; fifth side wall-1142; sixth sidewall-1143; a reflective film-12; a light guide plate-13; a third positioning column-131; seventh sidewall-1311; eighth side wall-1312; ninth sidewall-1313; an optical film 14; a diffusion film-141; a brightness enhancement film-142; brightness enhancement film-143; a convex portion-144; a light bar-15; foam gum-16; a display screen-21.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.
The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.
The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.
As shown in fig. 1 to 7, the present utility model relates to a vehicle-mounted backlight module for preventing a diaphragm from loosening and abnormal sound, wherein the vehicle-mounted backlight module is of a dual-screen structure design, and the dual-screen is that two liquid crystal display screens 21 are combined into a large screen, and each display screen 21 can be independently controlled, so that the vehicle-mounted backlight module comprises two backlight sources, and each backlight source can be independently controlled.
As shown in fig. 1 to 4, the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound comprises a lower frame 11, a reflective film 12, a light guide plate 13 and an optical diaphragm 14, wherein the reflective film 12 is arranged in the lower frame 11, the light guide plate 13 is arranged on the reflective film 12, the lower frame 11 comprises a bottom plate 111 and a side frame 112 fixedly connected with the bottom plate 111, a containing cavity is formed between the side frame 112 and the bottom plate 111, the reflective film 12, the light guide plate 13 and the optical diaphragm 14 are arranged in the containing cavity, a first positioning column 113 and a second positioning column 114 are fixedly connected to the bottom plate 111 of the lower frame 11, the first positioning column 113 and the second positioning column 114 are respectively arranged in the containing cavity, the first positioning column 113 and the second positioning column 114 are respectively arranged on the light incident side of the light guide plate 13, the optical diaphragm 14 is provided with a first positioning groove 101 and a second positioning groove 102, the first positioning groove 101 and the first positioning column 113 are correspondingly arranged, the second positioning groove 102 and the second positioning column 114 are correspondingly arranged, and the first positioning column 113 and the second positioning column 114 are matched with the first positioning column 101 and the second positioning column 114 are matched with the second positioning column 114 for positioning the optical diaphragm 14. In the present embodiment, the lower frame 11 is a die cast, and thus the bottom plate 111, the side frames 112, the first positioning column 113, and the second positioning column 114 are integrally formed.
According to the vehicle-mounted backlight module, the first positioning column 113 and the second positioning column 114 are arranged on the bottom plate 111 of the lower frame 11, the optical film 14 is respectively arranged in the first positioning groove 101 corresponding to the first positioning column 113 and the second positioning groove 102 corresponding to the second positioning column 114, the first positioning column 113, the first positioning groove 101 and the second positioning column 114 are matched with the second positioning groove 102, abnormal sound of the optical film 14 in the normal use or signal tolerance test process can be avoided, in addition, the first positioning column 113 and the second positioning column 114 are arranged on the bottom plate 111, the distance between the optical film 14 and a window area can be increased, bright edges of the optical film 14 can be avoided, the quality of products is improved, the service life of the vehicle-mounted backlight module is prolonged, and the service experience of customers is improved.
Preferably, the optical film 14 includes a first side, a second side, and a third side and a fourth side, where the first side is located on the light incident side, the first positioning groove 101 is formed by recessing the third side toward a direction close to the fourth side, and the second positioning groove 102 is formed by recessing the fourth side toward a direction close to the third side.
As shown in fig. 3, the length of the first positioning column 113 in the X direction is 3.5mm, the length of the first positioning column 113 in the Y direction is 1.5mm, and the side wall of the first positioning column 113 and the groove wall of the first positioning groove 101 have a first gap in the Y direction, the first gap being 0.1mm to 0.3mm; in the present embodiment, the side walls of the first positioning column 113 are a first side wall 1131, a second side wall 1132 and a third side wall 1133 respectively, the first side wall 1131 is opposite to the third side wall 1133, the second side wall 1132 is fixedly connected between the first side wall 1131 and the third side wall 1133, the first side wall 1131 is disposed at one end of the first positioning column 113 near the light incident side, the first side wall 1131 is parallel to the light incident side, the groove walls of the first positioning groove 101 are a first groove wall 1011, a second groove wall 1012 and a third groove wall 1013 respectively, the second groove wall 1012 is opposite to the third groove wall 1013, the second groove wall 1012 is fixedly connected between the second groove wall 1012 and the third groove wall 1013, wherein the first groove wall 1011 is disposed corresponding to the first side wall 1131, the second groove wall 1012 is disposed corresponding to the second side wall 1132, and the third groove wall 1013 is disposed corresponding to the third side wall 1133, and therefore, the gaps between the first groove wall 1011 and the third groove wall 1013 and the third groove wall 1133 are first gaps respectively; the first gap is, for example, 0.1mm, 0.15mm or 0.3mm, but not limited thereto.
As shown in fig. 4, the length of the second positioning column 114 in the X direction is 3.5mm, the length of the second positioning column 114 in the Y direction is 1.5mm, and a second gap is formed between the side wall of the second positioning column 114 and the groove wall of the second positioning groove 102 in the Y direction, wherein the second gap is 0.1 mm-0.3 mm; in the present embodiment, the side walls of the second positioning column 114 are a fourth side wall 1141, a fifth side wall 1142 and a sixth side wall 1143, the fourth side wall 1141 is disposed opposite to the sixth side wall 1143, the fifth side wall 1142 is fixedly connected between the fourth side wall 1141 and the sixth side wall 1143, the fourth side wall 1141 is disposed at one end of the second positioning column 114 near the light incident side, the fourth side wall 1141 is disposed parallel to the light incident side, the groove walls of the second positioning groove 102 are a fourth groove wall 1021, a fifth groove wall 1022 and a sixth groove wall 1023, the fourth groove wall 1021 is disposed opposite to the sixth groove wall 1023, the fifth groove wall 1022 is fixedly connected between the fourth groove wall 1021 and the sixth groove wall 1023, wherein the fourth groove wall 1021 is disposed corresponding to the fourth side wall 1141, the fifth groove wall 1022 is disposed corresponding to the fifth side wall 1142, and the sixth groove wall 1023 is disposed corresponding to the sixth side wall 1143, and therefore the gaps between the fourth groove wall 1021 and the fourth groove wall 1141 and the sixth groove wall 1023 are second gaps respectively; the second gap is, for example, 0.1mm, 0.15mm or 0.3mm, but not limited thereto.
As shown in fig. 5, the light guide plate 13 is fixedly connected with a third positioning column 131, the third positioning column 131 is disposed in the middle of the light guide plate 13, the length of the third positioning column 131 in the X direction is 2.0mm, the length of the third positioning column 131 in the Y direction is 2.0mm, the optical film 14 is provided with a third positioning groove 103 disposed corresponding to the third positioning column 131, and the third positioning column 131 and the third positioning groove 103 cooperate to position the optical film 14. In the present embodiment, the sidewall of the third positioning post 131 and the groove wall of the third positioning groove 103 have a third gap in the X direction, and the third gap is 0.1mm to 0.3mm; in the present embodiment, the side walls of the third positioning column 131 are a seventh side wall 1311, an eighth side wall 1312 and a ninth side wall 1313, the seventh side wall 1311 and the ninth side wall 1313 are disposed opposite to each other, the eighth side wall 1312 is fixedly connected between the seventh side wall 1311 and the ninth side wall 1313, the eighth side wall 1312 is disposed at one end of the third positioning column 131 far away from the light entrance side, the third positioning groove 103 is in an "n" shape, the groove walls of the third positioning groove 103 are a seventh groove wall 1031, an eighth groove wall 1032 and a ninth groove wall 1033, the seventh side wall 1311 and the ninth groove wall 1033 are disposed opposite to each other, the eighth groove wall 1032 is fixedly connected between the seventh groove wall 1031 and the ninth groove wall 1033, the seventh groove wall 1031 and the eighth side wall 1311 are disposed corresponding to each other, and the ninth groove wall 1033 are disposed corresponding to the ninth side wall 1313, and therefore, the gap between the seventh groove wall 1031 and the ninth groove wall 1313 are respectively the gap; the third gap is, for example, 0.1mm, 0.15mm, or 0.3mm, but not limited thereto.
As shown in fig. 1, the second side, the third side and the fourth side are respectively provided with a plurality of protrusions 144, the side frame 112 of the lower frame 11 is provided with a plurality of fixing grooves corresponding to the protrusions 144, each protrusion 144 is respectively fixedly connected in the fixing groove, and the optical film 14 is fixedly connected to the lower frame 11; the mode of fixed connection accessible double faced adhesive tape is fixed, in addition, for the reliability of increase fixed connection, the mode that the accessible set up the fixed block is fixed the convex part 144 in the fixed slot, specifically: the fixing block is fixed in the fixing groove through double-sided adhesive tape.
As shown in fig. 1, the vehicle-mounted backlight module with the first side edge recessed toward the direction of the second side edge to form the avoidance groove 104, and capable of preventing the diaphragm from loosening and abnormal sound further comprises a light bar 15, wherein the light bar 15 can be fixedly connected to the inner wall of the side frame 112 through a heat-conducting double-sided adhesive tape, the light bar 15 is arranged on the light incident side of the light guide plate 13, the light bar 15 is arranged in the avoidance groove 104, and the light bar 15 is electrically connected to the flexible circuit board through a plurality of LED lamps.
Preferably, the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound comprises a window area, the distance between the first positioning column 113 and the window area is 4.5-5.5 mm, and the distance between the second positioning column 114 and the window area is 4.5-5.5 mm. In the present embodiment, the distance between the first positioning post 113 and the window area refers to the distance between the third sidewall 1133 of the first positioning post 113 and the window area, and the distance between the second positioning post 114 and the window area is the distance between the sixth sidewall 1143 of the second positioning post 114 and the window area; therefore, the distance between the first positioning post 113 and the window area is, for example, 4.5mm, 4.9mm, 5.0mm or 5.5mm, and the distance between the second positioning post 114 and the window area is, for example, 4.5mm, 4.9mm, 5.0mm or 5.5mm, but not limited thereto, and the distance can prevent the optical film 14 from having a bright edge due to the reflection or refraction phenomenon of the light beam of the first positioning post 113 and the second positioning post 114.
As shown in fig. 7, the optical film 14 includes a diffusion film 141, a brightness enhancement film 142 and a brightness enhancement film (DBEF) 143, the diffusion film 141 is disposed on the light guide plate 13, the brightness enhancement film 142 is disposed on the diffusion film 141, and the brightness enhancement film 142 is disposed on the brightness enhancement film 143, wherein the diffusion film 141, the brightness enhancement film 142 and the brightness enhancement film 143 can be fixed by double-sided adhesive, so as to reduce abnormal noise.
Preferably, the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound further comprises a foam rubber 16, and since the vehicle-mounted backlight module of the embodiment adopts a non-middle frame structure, the foam rubber 16 is arranged on the side frame 112, and the foam rubber 16 is used for buffering and fixing a display screen (FOG) 21.
Second embodiment
The vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound in this embodiment is substantially identical to the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound in the first embodiment in structure, and is different in the structures of the first positioning column 113 and the second positioning column 114.
Specifically, the width or the inner diameter of the first positioning column 113 gradually increases along the direction away from the bottom plate 111, that is, the section of the first positioning column 113 has an inverted trapezoid structure, so that the optical membrane 14 can be better limited; when the first positioning column 113 is a rectangular column, the width (X-axis direction) of the first positioning column 113 gradually increases in a direction away from the bottom plate 111; or when the first positioning column 113 is a cylinder, the outer diameter of the positioning column gradually increases in a direction away from the bottom plate 111; the width or the inner diameter of the second positioning post 114 gradually increases in a direction away from the bottom plate 111, and the second positioning post 114 has the same structure as the first positioning post 113, which is not described herein.
Third embodiment
The vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound in this embodiment is substantially identical to the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound in the first embodiment in structure, and is different in the structure of the first positioning column 113.
Specifically, the first positioning column 113 and the second positioning column 114 respectively include a first positioning portion and a second positioning portion that are fixedly connected, one end of the first positioning portion is fixedly connected to the bottom plate 111, the other end of the first positioning portion is fixedly connected to the second positioning portion, the width or the outer diameter of the second positioning portion is larger than that of the first positioning portion, the positioning groove of the optical film 14 is clamped in the first positioning portion, the second positioning portion limits the optical film 14, and the phenomenon that the optical film 14 falls off after a signal tolerance test or long-term use is avoided. In the present embodiment, when the first positioning column 113 is a rectangular column, the width (in the X-axis direction) of the second positioning portion is larger than the width of the first positioning portion; or when the first positioning column 113 is a cylinder, the outer diameter of the second positioning portion is larger than that of the first positioning portion.
The utility model also relates to a vehicle-mounted display device which comprises the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound. The vehicle-mounted display device of the utility model is, for example, a high-end vehicle-mounted instrument, a vehicle-mounted central control display, a vehicle-mounted vehicle recorder, a vehicle-mounted DVD navigation, a vehicle-mounted driver's cab integrated display screen or a vehicle-mounted streaming media rearview mirror, but the utility model is not limited to the above.
The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.
Claims (10)
1. The utility model provides a prevent on-vehicle backlight unit of not hard up abnormal sound of diaphragm, its characterized in that, includes lower frame, reflectance coating, light guide plate and optical diaphragm, the reflectance coating sets up in the lower frame, the light guide plate sets up on the reflectance coating, fixedly connected with first reference column and second reference column on the bottom plate of lower frame, first reference column with the second reference column is followed the length direction interval setting of light guide plate income light side, optical diaphragm is equipped with first constant head tank and second constant head tank, first reference column with first constant head tank cooperation the second reference column with the second constant head tank cooperation is in order to fix a position optical diaphragm.
2. The vehicle-mounted backlight module for preventing loosening and abnormal sound of a diaphragm according to claim 1, wherein the optical diaphragm comprises a first side, a second side, a third side and a fourth side, the first side is positioned on the light incident side, the first positioning groove is formed by recessing the third side towards a direction close to the fourth side, and the second positioning groove is formed by recessing the fourth side towards a direction close to the third side.
3. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to claim 2, wherein a first gap is formed between the side wall of the first positioning column and the groove wall of the first positioning groove in the Y direction, and the first gap is 0.1-0.3 mm; the side wall of the second positioning column and the groove wall of the second positioning groove are provided with a second gap in the Y direction, and the second gap is 0.1-0.3 mm.
4. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to claim 2, wherein a plurality of protruding portions are respectively arranged on the second side edge, the third side edge and the fourth side edge, a plurality of fixing grooves which are arranged corresponding to the protruding portions are arranged on the side frame of the lower frame, and each protruding portion is respectively and fixedly connected in the fixing groove, so that the optical diaphragm is fixedly connected to the lower frame.
5. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to claim 2, wherein the first side edge is recessed towards the direction of the second side edge to form an avoidance groove, the vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound further comprises a lamp strip, the lamp strip is fixedly connected to the inner wall of the side frame of the lower frame, and the lamp strip is arranged in the avoidance groove.
6. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound as claimed in claim 1, wherein the width or the inner diameter of the first positioning column is gradually increased toward a direction away from the bottom plate; the width or the inner diameter of the second positioning column gradually increases towards the direction away from the bottom plate.
7. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to claim 1, wherein the first positioning column and the second positioning column respectively comprise a first positioning part and a second positioning part which are fixedly connected, one end of the first positioning part is fixedly connected with the bottom plate, the other end of the first positioning part is fixedly connected with the second positioning part, and the width or the outer diameter of the second positioning part is larger than that of the first positioning part.
8. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to claim 1, wherein the vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound comprises a window area, and the distance between the first positioning column and the window area is 4.5 mm-5.5 mm; the distance between the second positioning column and the window area is 4.5 mm-5.5 mm.
9. The vehicle-mounted backlight module for preventing diaphragm loosening and abnormal sound according to any one of claims 1 to 8, wherein the optical diaphragm comprises a diffusion film, a brightness enhancement film and a brightness enhancement film, the diffusion film is arranged on the light guide plate, the brightness enhancement film is arranged on the diffusion film, and the brightness enhancement film is arranged on the brightness enhancement film.
10. A vehicle-mounted display device, characterized by comprising the vehicle-mounted backlight module for preventing the diaphragm from loosening and abnormal sound according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321630276.9U CN220085205U (en) | 2023-06-25 | 2023-06-25 | Vehicle-mounted backlight module and vehicle-mounted display device for preventing diaphragm from loosening and abnormal sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321630276.9U CN220085205U (en) | 2023-06-25 | 2023-06-25 | Vehicle-mounted backlight module and vehicle-mounted display device for preventing diaphragm from loosening and abnormal sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220085205U true CN220085205U (en) | 2023-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321630276.9U Active CN220085205U (en) | 2023-06-25 | 2023-06-25 | Vehicle-mounted backlight module and vehicle-mounted display device for preventing diaphragm from loosening and abnormal sound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220085205U (en) |
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2023
- 2023-06-25 CN CN202321630276.9U patent/CN220085205U/en active Active
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Address after: 518000 floor 1, 2-4, and floor 1-3, No. 222-2, Buxin Road, Xinlan community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Handamei Electronics Co.,Ltd. Country or region after: China Address before: 518000 floor 1, 2-4, and floor 1-3, No. 222-2, Buxin Road, Xinlan community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HADBEST ELECTRONICS CO.,LTD. Country or region before: China |
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