CN114740659B - Backlight module, backlight module manufacturing method, head-up display and vehicle - Google Patents

Backlight module, backlight module manufacturing method, head-up display and vehicle Download PDF

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Publication number
CN114740659B
CN114740659B CN202210581690.9A CN202210581690A CN114740659B CN 114740659 B CN114740659 B CN 114740659B CN 202210581690 A CN202210581690 A CN 202210581690A CN 114740659 B CN114740659 B CN 114740659B
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CN
China
Prior art keywords
reflection
reflecting
cup
limiting
side walls
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Active
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CN202210581690.9A
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Chinese (zh)
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CN114740659A (en
Inventor
沈慧萍
蔡佩渠
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Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
General Interface Solution Ltd
Original Assignee
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
Yecheng Optoelectronics Wuxi Co Ltd
General Interface Solution Ltd
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Application filed by Interface Optoelectronics Shenzhen Co Ltd, Interface Technology Chengdu Co Ltd, Yecheng Optoelectronics Wuxi Co Ltd, General Interface Solution Ltd filed Critical Interface Optoelectronics Shenzhen Co Ltd
Priority to CN202210581690.9A priority Critical patent/CN114740659B/en
Publication of CN114740659A publication Critical patent/CN114740659A/en
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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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • 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
    • G02F1/133603—Direct backlight with LEDs

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The utility model relates to a backlight unit, backlight unit manufacturing method, new line display and vehicle, backlight unit include reflection cup and high reflection film, and the reflection cup includes a plurality of lateral walls, and a plurality of lateral walls form and hold the intracavity, and high reflection film is located at least partially and is held the intracavity, and high reflection film includes the reflection portion the same with the shape of lateral wall, and the internal surface of lateral wall is located in the reflection portion subsides to form the reflection chamber the same with the shape that holds the chamber. The backlight module can solve the problem that the reflectivity of the reflecting cup in the head-up display system needs to be improved.

Description

Backlight module, backlight module manufacturing method, head-up display and vehicle
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a backlight module, a method for manufacturing the backlight module, a head-up display, and a vehicle.
Background
As people have increased their functional demands on vehicles, heads-up display systems are increasingly being used on vehicles. The image generating unit is an important component of the head-up display system, recovers the brightness of a light-emitting diode (LED) through a reflection cup, reflects the brightness of the LED, forms an image through a liquid crystal display (Liquid Crystal Display, LCD), finally projects the image to a windshield and other positions, is convenient for a driver to watch, and can greatly improve driving experience and driving safety. In order to make the image projected on the windshield clearer and brighter, it is necessary to make the reflection cup have a higher reflectivity, but the reflectivity of the reflection cup is still to be improved.
Disclosure of Invention
Accordingly, it is necessary to provide a backlight module, a method for manufacturing the backlight module, a head-up display and a vehicle for improving the reflectivity of the reflective cup in the head-up display system.
According to an aspect of the present application, there is provided a backlight module applied to a head-up display, including: the reflecting cup comprises a plurality of side walls, and the side walls form a containing cavity; and the high-reflection film is at least partially arranged in the accommodating cavity, the high-reflection film comprises a reflection part with the same shape as the side wall, and the reflection part is attached to the inner surface of the side wall and forms a reflection cavity with the same shape as the accommodating cavity.
In some embodiments, the reflective cup comprises a plurality of the side walls that enclose the receiving cavity; the high-reflection film comprises a plurality of reflection parts, the number of the reflection parts is the same as that of the side walls, and the shapes of the reflection parts are the same as those of the side walls in a one-to-one correspondence manner; and a plurality of the reflecting parts are integrally formed.
In some embodiments, the reflector cup is provided with a limit bump; the high-reflection film is provided with a first limiting hole, the first limiting hole is matched with the limiting protruding block in a clamping mode, and the high-reflection film is fixedly clamped in the reflecting cup through the limiting protruding block and the first limiting hole in a clamping mode.
In some embodiments, the reflector cup has opposite necked-in and flared ends, both of which are provided with the limit bump; the high-reflection film comprises a necking fixing part and a flaring fixing part which are connected to the two opposite ends of the reflecting part, the necking fixing part and the flaring fixing part are bent towards the outside of the reflecting cavity relative to the reflecting part, and the necking fixing part and the flaring fixing part are provided with first limiting holes.
In some embodiments, the backlight module further comprises a mounting plate, wherein a second limiting hole is arranged on the mounting plate, and the second limiting hole is in clamping fit with the limiting projection at the necking end; the reflecting cup is fixedly clamped with the mounting plate through the limiting protruding block positioned at the necking end and the second limiting hole, and the necking fixing part is positioned between the necking end and the mounting plate.
In some embodiments, the backlight module further comprises a lens group, wherein a third limiting hole is arranged on the lens group, and the third limiting hole is in clamping fit with the limiting protruding block positioned at the flaring end; the lens group is fixedly clamped with the reflecting cup through the limiting protruding block positioned at the flaring end and the third limiting hole, and the flaring fixing part is positioned between the flaring end and the lens group.
According to another aspect of the present application, there is provided a method for manufacturing a backlight module, including the steps of: placing a high-reflection film in the accommodating cavity of the reflection cup; the reflecting cup comprises a plurality of side walls, and the side walls form the accommodating cavity; the high-reflection film comprises a plurality of reflection parts, and the shape of the reflection parts is the same as that of the side walls; and attaching the reflecting part to the inner surface of the side wall so that the reflecting part forms a reflecting cavity with the same shape as the accommodating cavity.
In some embodiments, the reflective cup comprises a plurality of the side walls that enclose the receiving cavity; the method further comprises the steps of: folding the high reflection film to form a plurality of the reflection parts; the number of the reflecting parts is the same as that of the side walls, and the shapes of the reflecting parts are the same as those of the side walls in a one-to-one correspondence mode.
In some embodiments, the reflector cup is provided with a limit bump; the high-reflection film is provided with a first limiting hole which is in clamping fit with the limiting convex block; the method further comprises the steps of: and clamping the limiting convex blocks into the first limiting holes.
According to another aspect of the present application, a head-up display is provided, including a backlight module as described above.
According to another aspect of the present application, there is provided a vehicle comprising a head-up display as previously described.
The embodiment of the application provides a be applied to backlight unit of new line display sets up high reflectance coating in the reflection cup, and wherein, high reflectance coating includes a plurality of reflection portions, and the internal surface of the lateral wall of reflection cup is located in the subsides of reflection portion, forms the reflection chamber of high reflectance through reflection portion, utilizes this reflection chamber to reflect light, promotes the reflectivity of reflection cup.
Drawings
FIG. 1 is a schematic view of a reflector cup according to an embodiment of the present disclosure;
FIG. 2 is a schematic view showing an expanded structure of a highly reflective film according to an embodiment of the present application;
FIG. 3 is a schematic view of the folded highly reflective film of FIG. 2;
FIG. 4 is a schematic view of a mounting plate according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of an assembly structure of a mounting plate and a reflector cup according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure.
Reference numerals illustrate:
100: reflective cup 220: reflective cavity
110: side wall 230: first limiting hole
120: the housing chamber 240: necking fixing part
130: limit bump 250: flaring fixing part
140: necking end 300: mounting plate
150: flared end 310: second limiting hole
200: high reflection film 400: lens group
210: reflection unit 410: third limiting hole
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
In order to improve the reflectivity of the reflection cup in the head-up display system, a plating layer is added on the inner wall of the reflection cup in a traditional manufacturing process in an electroplating mode, but the obtained reflectivity is only 65%, and the problem of insufficient reflectivity still exists. Therefore, in the related art, a means of improving the reflectivity of the reflective cup by vapor deposition is adopted, but the surface of the reflective cup needs to be polished to meet the vapor deposition requirement in the vapor deposition process, but the reflective cup is not completely planar, so that the polishing of the corner is difficult.
In order to solve the above problems, the embodiment of the application provides a backlight module, which comprises a reflective cup and a high reflective film, wherein the high reflective film comprises a plurality of reflective parts, the shape of the reflective parts is the same as that of the side wall of the reflective cup, and the reflective parts are attached to the inner surface of the side wall of the reflective cup to obtain a reflective cavity with high reflectivity.
FIG. 1 shows a schematic structural diagram of a reflector cup in an embodiment of the present application; FIG. 2 is a schematic view showing an expanded structure of a highly reflective film according to an embodiment of the present application; fig. 3 shows a schematic structural view of the high reflection film of fig. 2 after being folded.
Referring to fig. 1 to 3, a backlight module provided in an embodiment of the present application is applied to a head-up display, and includes a reflective cup 100 and a high reflective film 200, wherein the reflective cup 100 includes a plurality of sidewalls 110, the plurality of sidewalls 110 form a receiving cavity 120, the high reflective film 200 is at least partially disposed in the receiving cavity 120, the high reflective film 200 includes a reflective portion 210 having the same shape as the sidewalls 110, and the reflective portion 210 is attached to an inner surface of the sidewalls 110 and forms a reflective cavity 220 having the same shape as the receiving cavity 120.
The backlight module applied to the head-up display provided by the embodiment of the application sets up the high reflection film 200 in the reflection cup 100, wherein the high reflection film 200 includes a plurality of reflection portions 210, the reflection portions 210 are attached to the inner surface of the side wall 110 of the reflection cup 100, a reflection cavity 220 with high reflectivity is formed by the reflection portions 210, the light is reflected by the reflection cavity 220, and the reflectivity of the reflection cup 100 is improved.
The high reflection film 200 may be a metal reflection film or a total dielectric reflection film. Further, the reflectivity of the high reflective film 200 is greater than or equal to 90% to ensure a high reflectivity in the reflective cavity 220. The high reflection film 200 has a thickness of 0.05mm to 10mm and a hardness of 3H to 11H.
The shape of the reflective cup 100 may specifically be a cylinder with one end flared and the other end necked, and the cross section of the cylindrical reflective cup 100 may be circular, elliptical, triangular, quadrilateral, or a combination thereof. The number of sidewalls 110 may be one sidewall 110 or a plurality of sidewalls 110. When the reflective cup 100 is in the shape of a circular cylinder, the number of the side walls 110 is one, and when the reflective cup 100 is in the shape of a square cylinder, the number of the side walls 110 is four. The accommodating chamber 120 may be used to accommodate the highly reflective film 200, and correspondingly, the reflective chamber 220 may be used to accommodate a backlight source, such as a LED (Light Emitting Diode) lamp, and reflect light.
Further, the high reflective film 200 and the sidewall 110 of the reflective cup 100 may be adhered and fixed by an adhesive layer (not shown). Specifically, the adhesive layer includes a pressure sensitive adhesive, and the pressure sensitive adhesive is pressed onto the reflective portion 210 before the reflective portion 210 of the high reflective film 200 is attached to the sidewall 110 of the reflective cup 100. Wherein, the thickness of the pressure sensitive adhesive is 0.05mm to 10mm.
In some embodiments, the reflective cup 100 includes a plurality of side walls 110, the plurality of side walls 110 enclose to form the accommodating cavity 120, the high reflective film 200 includes a plurality of reflective portions 210, the number of reflective portions 210 is the same as the number of side walls 110, and the shape of the reflective portions 210 is the same as the shape of the side walls 110 in a one-to-one correspondence. Specifically, the number of sidewalls 110 of the reflector cup 100 is one, three, four, five, six, or more.
In a specific embodiment, the number of the side walls 110 of the reflective cup 100 is four, the four side walls 110 are enclosed to form the accommodating cavity 120, the high reflective film 200 is correspondingly provided with four reflective portions 210, and the shapes of the reflective portions 210 are the same as those of the side walls 110 in a one-to-one correspondence manner, so that a reflective cavity 220 with the same shape as that of the accommodating cavity 120 is formed, and thus, each reflective portion 210 forming the reflective cavity 220 can be well attached to the side wall 110 of the reflective cup 100, and further, the flatness of the cavity wall of the reflective cavity 220 is ensured.
In some embodiments, the plurality of reflective portions 210 are integrally formed. Specifically, the plurality of reflecting portions 210 may be formed by folding the entire highly reflective film 200, so that the joint of the plurality of reflecting portions 210 is smooth, so that the portion of the reflecting cavity 220 corresponding to the corner of the reflecting cup 100 also has high reflectivity. In addition, the plurality of reflecting portions 210 are integrally formed, so that the number of steps required for bonding between the high-reflection film 200 and the side wall 110 of the reflecting cup 100 is reduced, the manufacturing process is simplified, and the manufacturing efficiency is improved.
In some embodiments, the reflective cup 100 is provided with the limiting bump 130, the high reflective film 200 is provided with the first limiting hole 230, the first limiting hole 230 is in clamping fit with the limiting bump 130, and the high reflective film 200 is fixed on the reflective cup 100 through clamping the limiting bump 130 with the first limiting hole 230, so that on one hand, the operation steps can be simplified, the fixing process between the high reflective film 200 and the reflective cup 100 is convenient and quick, the time for attaching the high reflective film 200 is shortened, and the efficiency is improved; on the other hand, the flatness of the highly reflective film 200 can be prevented from being affected by the stretchability of the adhesive layer. Wherein, the number of the limit protrusions 130 may be one or more, and the shape of the limit protrusions 130 may be a circle, a triangle, a quadrangle, a pentagon, or a combination thereof.
Further, the reflecting cup 100 has a necking end 140 and a flaring end 150 which are opposite, and the necking end 140 and the flaring end 150 are provided with limiting lugs 130; the high reflection film 200 includes a necking fixing portion 240 and a flaring fixing portion 250 connected to opposite ends of the reflection portion 210, the necking fixing portion 240 and the flaring fixing portion 250 are respectively bent toward the outside of the reflection cavity 220 by the reflection portion 210, and the necking fixing portion 240 and the flaring fixing portion 250 are respectively provided with a first limiting hole 230. Because the shrinkage fixing portion 240 and the flaring fixing portion 250 are both bent towards the outside of the reflecting cavity 220 by the reflecting portion 210, the first limiting hole 230 is located outside the reflecting cavity 220, so that the portion of the high-reflection film 200 corresponding to the reflecting cavity 220 can be prevented from being damaged, and a good reflecting effect in the reflecting cavity 220 can be ensured. It will be appreciated that the flared end 150 has a larger caliber than the necked end 140. Wherein the caliber of the reflective cup 100 refers to the effective diameter of the cup opening when the cross-sectional shape of the reflective opening is non-circular.
It can be understood that when one end of the reflective cup 100 is flared and the other end is necked, and the cross section is quadrangular, when the entire high reflective film 200 is folded to form the plurality of reflective portions 210 and the necked-down fixing portions 240 and the flared fixing portions 250 corresponding to the plurality of reflective portions 210, creases are generated between the two adjacent reflective portions 210, between the reflective portions 210 and the necked-down fixing portions 240, and between the reflective portions 210 and the flared fixing portions 250, and cutting is required between the two adjacent necked-down fixing portions 240 and between the two adjacent flared fixing portions 250, so as to remove part of the redundant materials, avoid the mutual interference between the two adjacent necked-down fixing portions 240 and the two adjacent flared fixing portions 250, and further ensure that the high reflective film 200 is bonded and flattened in the reflective cup 100.
In some embodiments, the included angle of the material cut between two adjacent necking fixing portions 240 is 30 ° to 50 °, and the included angle of the material cut between two adjacent flaring fixing portions 250 is 30 ° to 50 ° or 120 ° to 145 °, so as to adapt to the shape of the reflection cup 100, thereby obtaining better uniformity and brightness, and obtaining better optical display effect.
Further, the necking end 140 and the flaring end 150 are respectively provided with a plurality of limit lugs 130. For example, when the reflective cup 100 has four side walls 110, the end surface of the necking end 140 and the end surface of the flaring end 150 each have four sides, and preferably, each side is provided with one or more limiting protrusions 130 to ensure a good clamping and fixing effect.
Preferably, the material of the necking fixing portion 240 and the material of the flaring fixing portion 250 are the same as those of the reflecting portion 210, for example, the necking fixing portion 240 and the flaring fixing portion 250 are integrally formed with the reflecting portion 210, specifically, formed by folding the entire highly reflecting film 200, so that the structure of the highly reflecting film 200 is simplified, and the bonding step between the highly reflecting film 200 and the reflecting cup 100 is simplified.
FIG. 4 shows a schematic structural view of a mounting plate in an embodiment of the present application; FIG. 5 shows a schematic diagram of an assembly structure of a mounting plate and a reflector cup in an embodiment of the present application.
Referring to fig. 1, fig. 4, and fig. 5, in some embodiments, the backlight module further includes a mounting plate 300, a second limiting hole 310 is disposed on the mounting plate 300, and the second limiting hole 310 is in clamping fit with the limiting bump 130 located at the necking end 140; the reflective cup 100 is fastened and fixed to the mounting plate 300 through the limiting bump 130 and the second limiting hole 310 at the necking end 140, and the necking fixing portion 240 is located between the necking end 140 and the mounting plate 300. The second limiting hole 310 is clamped with the limiting bump 130 at the necking end 140, so that the reflecting cup 100 is fixed on the mounting plate 300, and the necking fixing part 240 of the high reflecting film 200 is pressed between the reflecting cup 100 and the mounting plate 300, thereby enhancing the fixing effect between the high reflecting film 200 and the reflecting cup 100 and avoiding the high reflecting film 200 from displacing.
Further, the backlight module further includes a light source mounted on the mounting plate 300, the necking end 140 of the reflective cup 100 is provided with a light inlet, and the light source is located in the light inlet when the reflective cup 100 is mounted on the mounting plate 300. Wherein the light source may be an LED lamp and the mounting board 300 may be a circuit board.
Fig. 6 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure.
Referring to fig. 1, 3 and 6, in some embodiments, the backlight module further includes a lens assembly 400, and a third limiting hole 410 is disposed on the lens assembly 400, and the third limiting hole 410 is engaged with the limiting bump 130 at the flared end 150. The lens assembly 400 is clamped and fixed to the reflective cup 100 through the limiting bump 130 and the third limiting hole 410 at the flared end 150, and the flared fixing portion 250 is located between the flared end 150 and the lens assembly 400. Wherein the lens group 400 includes one or more lenses arranged in a stack. The lens group 400 is installed at the flared end 150 of the reflection cup 100, so that on one hand, the light emitting effect is better, and on the other hand, the internal environment of the reflection cup 100 is protected. The lens group 400 is fixed on the reflecting cup 100 by clamping the third limiting hole 410 with the limiting bump 130 positioned at the flared end 150, and the flared fixing portion 250 of the high-reflection film 200 is pressed between the reflecting cup 100 and the lens group 400, so that the fixing effect between the high-reflection film 200 and the reflecting cup 100 is enhanced, and the high-reflection film 200 is prevented from being displaced.
Based on the same purpose, the application also provides a manufacturing method of the backlight module.
Referring to fig. 1 and 3, in some embodiments, the method for manufacturing a backlight module includes the following steps:
placing the high reflection film 200 in the receiving chamber 120 of the reflection cup 100; wherein, the reflective cup 100 comprises a plurality of side walls 110, and the side walls 110 form a containing cavity 120; the high reflection film 200 includes a plurality of reflection parts 210, and the shape of the reflection parts 210 is the same as that of the sidewalls 110;
the reflecting portion 210 is attached to the inner surface of the sidewall 110 such that the reflecting portion 210 forms a reflecting cavity 220 having the same shape as the receiving cavity 120.
In the method for manufacturing the backlight module provided by the embodiment of the invention, the high-reflection film 200 is disposed in the reflection cup 100, wherein the high-reflection film 200 includes a plurality of reflection portions 210, the reflection portions 210 are adhered to the inner surface of the side wall 110 of the reflection cup 100, the reflection portions 210 form the reflection cavity 220 with high reflectivity, and the reflection cavity 220 is utilized to reflect light, so as to improve the reflectivity of the reflection cup 100.
Referring to fig. 2 and 3, in some embodiments, the reflector cup 100 includes a plurality of sidewalls 110, the plurality of sidewalls 110 enclosing a receiving cavity 120. The backlight module manufacturing method further comprises the following steps: folding the high reflection film 200 to form a plurality of reflection parts 210; the number of the reflective parts 210 is the same as the number of the sidewalls 110, and the shape of the reflective parts 210 is the same as the shape of the sidewalls 110 in a one-to-one correspondence. The high-reflectivity film 200 is folded to form the plurality of reflecting portions 210, so that the joint of the plurality of reflecting portions 210 is flat, and thus, the portion of the reflecting cavity 220 corresponding to the corner of the reflecting cup 100 has high reflectivity. In addition, the plurality of reflecting portions 210 are integrally formed, so that the number of steps required for bonding between the high-reflection film 200 and the side wall 110 of the reflecting cup 100 is reduced, the manufacturing process is simplified, and the manufacturing efficiency is improved.
Referring to fig. 1 and 3, in some embodiments, a limit bump 130 is provided on the reflective cup 100; the high reflection film 200 is provided with a first limit hole 230, and the first limit hole 230 is in clamping fit with the limit bump 130; the backlight module manufacturing method further comprises the following steps: the limit bump 130 is snapped into the first limit hole 230. The high-reflection film 200 is fixed on the reflection cup 100 by clamping the limiting bump 130 with the first limiting hole 230, so that on one hand, the operation steps can be simplified, the fixing process between the high-reflection film 200 and the reflection cup 100 is convenient and quick, the time for attaching the high-reflection film 200 is shortened, and the efficiency is improved; on the other hand, the flatness of the highly reflective film 200 can be prevented from being affected by the stretchability of the adhesive layer.
Based on the same purpose, the application also provides a head-up display, which comprises the backlight module.
Based on the same object, the application also provides a vehicle, which comprises the head-up display.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (9)

1. The utility model provides a backlight unit, is applied to new line display, its characterized in that includes:
the reflecting cup comprises a plurality of side walls, and the side walls form a containing cavity; and
the high-reflection film is at least partially arranged in the accommodating cavity, the high-reflection film comprises a reflection part with the same shape as the side wall, and the reflection part is attached to the inner surface of the side wall and forms a reflection cavity with the same shape as the accommodating cavity;
the reflecting cup comprises a plurality of side walls, and the side walls are enclosed to form the accommodating cavity;
the high-reflection film comprises a plurality of reflection parts, the number of the reflection parts is the same as that of the side walls, and the shapes of the reflection parts are the same as those of the side walls in a one-to-one correspondence manner;
and a plurality of the reflecting parts are integrally formed.
2. The backlight module according to claim 1, wherein the reflecting cup is provided with a limit bump;
the high-reflection film is provided with a first limiting hole, the first limiting hole is matched with the limiting protruding block in a clamping mode, and the high-reflection film is fixedly clamped in the reflecting cup through the limiting protruding block and the first limiting hole in a clamping mode.
3. The backlight module according to claim 2, wherein the reflective cup has a reduced end and a flared end opposite to each other, and the reduced end and the flared end are both provided with the limit bump;
the high-reflection film comprises a necking fixing part and a flaring fixing part which are connected to the two opposite ends of the reflecting part, the necking fixing part and the flaring fixing part are bent towards the outside of the reflecting cavity relative to the reflecting part, and the necking fixing part and the flaring fixing part are provided with first limiting holes.
4. A backlight module according to claim 3, further comprising a mounting plate, wherein a second limiting hole is formed in the mounting plate, and the second limiting hole is in clamping fit with the limiting projection at the necking end;
the reflecting cup is fixedly clamped with the mounting plate through the limiting protruding block positioned at the necking end and the second limiting hole, and the necking fixing part is positioned between the necking end and the mounting plate.
5. A backlight module according to claim 3, further comprising a lens group, wherein a third limiting hole is formed in the lens group, and the third limiting hole is in clamping fit with the limiting projection at the flaring end;
the lens group is fixedly clamped with the reflecting cup through the limiting protruding block positioned at the flaring end and the third limiting hole, and the flaring fixing part is positioned between the flaring end and the lens group.
6. The manufacturing method of the backlight module is characterized by comprising the following steps:
folding the high reflection film to form a plurality of reflection parts;
placing a high-reflection film in the accommodating cavity of the reflection cup; the reflecting cup comprises a plurality of side walls, and the side walls are enclosed to form the accommodating cavity; the high-reflection film comprises a plurality of reflection parts, and the shape of the reflection parts is the same as that of the side walls; the number of the reflecting parts is the same as that of the side walls, and the shapes of the reflecting parts are the same as that of the side walls in a one-to-one correspondence manner;
and attaching the reflecting part to the inner surface of the side wall so that the reflecting part forms a reflecting cavity with the same shape as the accommodating cavity.
7. The method of claim 6, wherein the reflector cup is provided with a limit bump; the high-reflection film is provided with a first limiting hole which is in clamping fit with the limiting convex block;
the method further comprises the steps of:
and clamping the limiting convex blocks into the first limiting holes.
8. A head-up display comprising a backlight module according to any one of claims 1 to 5.
9. A vehicle comprising the heads-up display of claim 8.
CN202210581690.9A 2022-05-26 2022-05-26 Backlight module, backlight module manufacturing method, head-up display and vehicle Active CN114740659B (en)

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CN201655836U (en) * 2009-12-29 2010-11-24 罗本杰(北京)光电研究所有限公司 Reflecting, radiating and sealing base of high power LED light source
JP2011203720A (en) * 2010-03-04 2011-10-13 Sekisui Plastics Co Ltd Reflection plate, illumination unit, illumination device, and display device
CN204387959U (en) * 2015-02-06 2015-06-10 成都奥晶科技有限责任公司 A kind of high uniformity rectangular light spot LED module
CN105278163B (en) * 2015-11-16 2019-01-22 深圳市华星光电技术有限公司 A kind of down straight aphototropism mode set and display device
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