CN111175880A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN111175880A CN111175880A CN202010115280.6A CN202010115280A CN111175880A CN 111175880 A CN111175880 A CN 111175880A CN 202010115280 A CN202010115280 A CN 202010115280A CN 111175880 A CN111175880 A CN 111175880A
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- light
- elastic block
- backlight module
- reflective film
- elastic
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
本发明涉及一种背光模组，包括背板和容纳于所述背板内的导光板，所述导光板包括相邻设置的入光面和出光面，以及与所述入光面和/或所述出光面相邻的多个侧面，至少一个所述侧面上设置有反射膜材，所述背板上与所述反射膜材相对的面上设置有多个间隔设置的弹性块；所述反射膜材上设置有多个与所述弹性块一一对应的通孔，每个所述弹性块在对应的所述反射膜材上的正投影位于所述通孔内。本发明还涉及一种显示装置。
The invention relates to a backlight module, comprising a backplane and a light guide plate accommodated in the backplane, wherein the light guide plate includes a light incident surface and a light exit surface arranged adjacently, and a A plurality of side surfaces adjacent to the light-emitting surface, at least one of the side surfaces is provided with a reflective film material, and a plurality of elastic blocks arranged at intervals are provided on the surface of the back plate opposite to the reflective film material; the The reflective film material is provided with a plurality of through holes corresponding to the elastic blocks one-to-one, and the orthographic projection of each elastic block on the corresponding reflective film material is located in the through holes. The present invention also relates to a display device.
Description
Technical Field
The invention relates to the technical field of manufacturing of display products, in particular to a backlight module and a display device.
Background
Televisions and other display devices using blue LED-quantum dot film schemes have become more and more popular than normal white liquid crystal display devices due to their high color gamut and simpler manufacturing process compared to OLED (organic light-Emitting Diode). However, in the side-entry backlight display, especially in the thin narrow bezel type, the problem of blue light leakage due to the reflection film material being lifted by impact or the like at the boundary rubber and being peeled from the light guide plate becomes more serious than the white LED display: when white light leaks, the image quality shows brightness difference, and the subjectivity is acceptable; however, when blue light leaks, the image quality shows a color difference, and human eyes are very sensitive to the color difference contrast.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a backlight module and a display device, which solve the light leakage problem caused by the local tilting of the reflective film material and the peeling of the reflective film material from the light guide plate due to the elastic block.
In order to achieve the purpose, the invention adopts the technical scheme that: a backlight module comprises a back plate and a light guide plate accommodated in the back plate, wherein the light guide plate comprises a light incoming surface and a light outgoing surface which are arranged adjacently, and a plurality of side surfaces which are adjacent to the light incoming surface and/or the light outgoing surface;
the reflecting film material is provided with a plurality of through holes which are in one-to-one correspondence with the elastic blocks, and the orthographic projection of each elastic block on the corresponding reflecting film material is positioned in the through hole.
Optionally, one surface of the elastic block facing the reflective film material is a reflective surface.
Optionally, the elastic block is made of a light absorbing material, or the outer surface of the elastic block is coated with a light absorbing material.
Optionally, the outer surface of the elastic block is black.
Optionally, the outer surface of the elastic block is yellow, so that blue light irradiated on the elastic block is converted into white light.
Optionally, a light absorbing layer is disposed between the back plate and the elastic block, and an orthographic projection of the through hole corresponding to the elastic block on the back plate is located in the light absorbing layer.
Optionally, the light absorbing layer is a light-shielding adhesive tape.
Optionally, a light absorbing layer is disposed on the back plate in a peripheral area of the elastic block, and an orthographic projection of an edge of the light absorbing layer far away from the elastic block on the corresponding reflective film material is located on the periphery of the through hole corresponding to the elastic block.
Optionally, the shape of the cross section of the through hole in the direction parallel to the reflective film material conforms to the shape of the surface of the elastic block facing the reflective film material.
The invention also provides a display device comprising the backlight module.
The invention has the beneficial effects that: through set up on the reflection membrane material a plurality of with the through-hole of elasticity piece one-to-one, be about to carry out the fretwork setting with the position that the elasticity piece corresponds on the reflection membrane material, at in-process such as mechanical vibration, reliability experiment, reduce the contact between elasticity piece and the reflection membrane material to avoided the reflection membrane material because the elasticity piece arouse paste between and pay badly with the light guide plate, avoided the light leak.
Drawings
FIG. 1 is a schematic diagram of a backlight module according to the related art;
FIG. 2 is a schematic view of a backlight module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a backlight module according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 shows a phenomenon that the reflective film 2 is tilted in an area corresponding to the elastic block 4, in a conventional setting, in order to prevent the light guide plate 1 from shaking, or the light guide plate 1 is expanded due to an environmental problem, an elastic buffer structure may be disposed between the back plate 3 and the light guide plate 1, that is, the elastic block 4, specifically, the reflective film 2 is disposed on the light guide plate 1, and the elastic block 4 is disposed between the reflective film 2 and the back plate 3, in a reliability experiment of mechanical vibration and various temperature and humidity environment tests, the elastic block 4 may continuously rub and squeeze the reflective film 2, which easily causes peeling between the reflective film 2 and the light guide plate 1, so that the reflective film 2 and the light guide plate 1 are poorly attached, for example, a portion indicated by a dotted circle in fig. 1, the reflective film 2 is tilted, thereby generating light leakage.
In view of the above technical problems, an embodiment of the present invention provides a backlight module, as shown in fig. 2, the backlight module in this embodiment includes a back plate 3 and a light guide plate 1 accommodated in the back plate 3, where the light guide plate 1 includes a light incident surface and a light emitting surface which are adjacently disposed, and a plurality of side surfaces adjacent to the light incident surface and/or the light emitting surface, at least one of the side surfaces is provided with a reflective film material 2, and a surface of the back plate 3 opposite to the reflective film material 2 is provided with a plurality of elastic blocks 4 which are disposed at intervals;
the reflecting film material 2 is provided with a plurality of through holes 21 corresponding to the elastic blocks 4 one by one, and the orthographic projection of each elastic block 4 on the corresponding reflecting film material 2 is positioned in the through hole 21.
The setting of through-hole 21 for in reliability experiments such as mechanical oscillation, various ambient temperature tests, reduce the contact between elastic block 4 and the reflection membrane material 2, extrusion etc., can make even and can not produce the contact between elastic block 4 and the reflection membrane material 2, reflection membrane material 2 can not receive the force that elastic block 4 exerted promptly, thereby avoided reflection membrane material 2 because the perk that the 4 application of force of elastic block caused, avoided promptly that the adhesion that peels off the production between reflection membrane material 2 and the light guide plate 1 is bad, avoided the light leak.
In this embodiment, the elastic block 4 is inserted into the corresponding through hole 21, and the distance between the elastic block 4 and the light guide plate 1 is within a preset range, so that the reflective film 2 and the light guide plate 1 are prevented from being poorly attached to each other due to the elastic block, and light leakage is effectively prevented.
It should be noted that the distance between the elastic block 4 and the light guide plate 1 is within a preset range, the preset range can be set according to actual needs, the distance between the elastic block 4 and the light guide plate 1 can be zero, or a certain gap can be reserved, so as to avoid interference.
It should be noted that the light guide plate is generally a rectangular parallelepiped structure, and includes 6 faces, where one face facing the viewer is a light exit face, and the remaining 5 faces are: the light source is disposed on one of the 4 side surfaces adjacent to the light exit surface, and the side surface of the light guide plate, which is the light entrance surface, is the surface other than the light entrance surface and the light exit surface, that is, the side surface adjacent to the light exit surface (i.e., the surface facing away from the viewer).
In this embodiment, one surface of the elastic block 4 facing the reflective film 2 is a reflective surface.
Due to the arrangement of the through hole 21, the side surface of the light guide plate 1 is located at the position of the through hole 21, and light leaks out without being reflected by the reflective film 2, but the elastic block 4 itself has a reflective function, that is, one surface of the elastic block 4 facing the reflective film 2 is a reflective surface, and the reflective surface corresponding to the elastic block 4 has the same reflective function as the reflective film 2.
In a specific embodiment of this embodiment, in order to effectively prevent light leakage, the elastic blocks 4 are inserted into the corresponding through holes 21, and the elastic blocks 4 are in contact with the inner side walls of the corresponding through holes 21.
In a specific implementation manner of this embodiment, in order to effectively avoid the problems of the elastic block 4, such as tilting, caused by the reflective film 2, a gap is formed between the elastic block 4 and the corresponding inner sidewall of the through hole 21, and the gap is smaller than a preset value. The preset value can be set according to actual needs, and generally cannot be too large, so that light leakage is prevented.
The thickness of the reflective film 2 is usually very small, typically only 0.2mm, the distance gap between the elastic block 4 and the light guide plate 1 is not necessary in design and can be adjusted according to the actual design (the distance between the elastic block 4 and the light guide plate 1 is too large, the light guide plate will shake, and therefore the light guide plate is scratched, the distance between the elastic block 4 and the light guide plate 1 is too small or zero, and the space for the light guide plate to expand by heating is not enough), therefore, under the condition that the reflective film 2 itself is thin, in practical applications, the elastic blocks 4 can be inserted into the through holes 21 (for example, the distance between the elastic blocks 4 and the light guide plate 1 is 0.1mm), even the elastic blocks 4 can contact the light guide plate, the elastic block 4 may not be inserted into the through hole 21, that is, a gap (which may be zero) may be provided between the elastic block 4 and the through hole 21. When the elastic block 4 and the light guide plate 1 have a gap therebetween, the light leakage is large, the light absorption capacity of the elastic block 4 is required to be strong, and if the gap between the elastic block 4 and the light guide plate 1 is zero, that is, the elastic block 4 is in contact with the light guide plate 1, the light leakage is small, and the display effect is better.
Although the elastic block 4 has a reflection function, the reflection of the elastic block 4 is different from the reflection of the reflective film material 2 due to different materials, and the like, and a part of light leaks out in the gap between the elastic block 4 and the light guide plate 1, and if white light is present, the image quality is represented as a luminance difference, and if the leaked light is a very small part, the image quality is represented as a color difference, and if blue light is present, the human eye is very sensitive to the color difference contrast.
In order to solve the problem of blue light leakage, two schemes are adopted in this embodiment, in which the first scheme is to absorb blue light, and the second scheme is to convert blue light into white light, and the two schemes are described below respectively.
In a specific implementation manner of this embodiment, the elastic block 4 is made of a light absorbing material, or the outer surface of the elastic block 4 is coated with a light absorbing material.
The blue light emitted from the corresponding through hole 21 is absorbed through the light absorption effect of the elastic block 4, and the blue light is prevented from leaking.
In this embodiment, the outer surface of the elastic block 4 is black.
The elastic block 4 may be made of black rubber or other materials, but a black light absorbing material, such as black ink, is coated on the outer surface of the elastic block 4.
In a specific implementation manner of this embodiment, the outer surface of the elastic block 4 is yellow, so that the blue light irradiated on the elastic block 4 is converted into white light.
The yellow is generally formed by mixing red and green, and the red, blue and green are mixed to form white, and the blue light emitted through the through hole 21 is irradiated on the corresponding yellow elastic block 4 to form white light, so that different picture effects caused by color differences are eliminated.
In order to make the outer surface of the elastic block 4 yellow, the outer surface of the elastic block 4 may be coated with a yellow paint, but not limited thereto.
The elastic block is made of rubber or foam, but the elastic block is not limited in sequence.
In a specific implementation manner of this embodiment, a light absorbing layer 5 is disposed between the back plate 3 and the elastic block 4, and an orthogonal projection of the through hole 21 corresponding to the elastic block 4 on the back plate 3 is located in the light absorbing layer 5.
The light absorption layer 5 is arranged to further reduce light leakage, part of light emitted from the through hole 21 irradiates the elastic block 4, is absorbed, or is converted into white light, or is reflected, part of light leaks from a gap between the elastic block 4 and the reflection film material 2, and the leaked light irradiates the light absorption layer 5 and is absorbed by the light absorption layer 5, so that light leakage is effectively prevented.
The specific structural form of the light absorbing layer 5 may be various, and in this embodiment, the light absorbing layer 5 is a light shielding tape.
The arrangement of the shading adhesive tape can realize that the elastic block 4 is fixed on the back plate 3 and can also play a role in preventing light leakage.
It should be noted that, when the light absorbing layer 5 adopts the light-shielding adhesive tape, only the first region for bonding the elastic block 4 is needed to perform the bonding function, and the region outside the first region is needed to perform the light absorbing function, so the release paper in the first region needs to be removed to expose the bonding layer, and the release paper in the region outside the first region can be determined to be removed according to actual needs, that is, on the basis of not affecting the light absorbing function, the release paper in the region outside the first region can be removed, or not removed.
In a specific implementation manner of this embodiment, a light absorbing layer 5 is disposed on the back plate 3 in a peripheral area of the elastic block 4, and an orthographic projection of a side of the light absorbing layer 5 away from the elastic block 4 on the corresponding reflective film 2 is located on a periphery of the through hole 21 corresponding to the elastic block 4.
Part of light emitted from the through hole 21 irradiates the elastic block 4, is absorbed, or is converted into white light, or is reflected, part of light leaks from a gap between the elastic block 4 and the reflective film material 2, and the leaked light irradiates the light absorption layer 5 positioned in the peripheral area of the elastic block 4 and is absorbed by the light absorption layer, so that light leakage is effectively prevented.
The light absorbing layer 5 may be formed by coating an ink layer or attaching a light shielding adhesive, which is not limited herein.
In the present embodiment, the light absorbing layer 5 and the edge of the elastic block 4 are in seamless contact, so that light leakage is effectively avoided.
In this embodiment, the shape of the cross section of the through hole 21 in the direction parallel to the reflective film 2 conforms to the shape of the surface of the elastic block 4 facing the reflective film 2.
Preferably, the orthographic projection of the elastic block 4 on the corresponding reflective film material 2 is completely the same as the shape of the cross section of the through hole 21 in the direction parallel to the reflective film material 2, so that the light leakage is effectively prevented on the premise of avoiding the occurrence of poor peeling and adhesion between the reflective film material 2 and the light guide plate 1 caused by the extrusion of the elastic block 4.
It should be noted that the position and size of the through hole 21 correspond to the position and size of the corresponding elastic block 4, and the through hole 21 is not limited to be completely located inside the reflective film 2, for example, in a certain direction, the length of the surface of the elastic block 4 facing the reflective film 2 is not less than the length of the reflective film 2, and the through hole 21 is disposed through the reflective film 2 in the direction, that is, the through hole 21 divides the reflective film 2 into two parts; for example, if a part of the elastic block 4 is exposed out of the reflective film 2, one end of the through hole 21 penetrates through the reflective film 2.
It should be noted that, in a specific embodiment of this embodiment, a light absorbing layer 5 is disposed between the back plate 3 and the elastic block 4, at this time, since an area of an orthographic projection of the through hole 21 on the back plate is smaller than an area of the light absorbing layer 5, that is, light leaking from a gap between the elastic block 4 and the reflective film 2 can be absorbed by the light absorbing layer 5, an area of a surface of the elastic block 4 facing the reflective film 2 is smaller than an area of a cross section of the through hole 21 in a direction parallel to the reflective film 2 (slightly smaller, that is, an area of a surface of the elastic block 4 facing the reflective film 2 is smaller than an area of a cross section of the through hole in a direction parallel to the reflective film 2 by a predetermined value, so as to avoid light leakage exceeding a light absorbing capability of the light absorbing layer, thereby effectively avoiding mechanical vibration, light leakage, and mechanical vibration, In reliability tests such as various environmental temperature changes, the elastic blocks apply force to the reflecting film material, and poor adhesion of the reflecting film material to the light guide plate due to the elastic blocks is effectively prevented.
In a specific embodiment of this embodiment, a light absorbing layer 5 is disposed on the back plate 3 at the peripheral region of the elastic block 4, at this time, an orthographic projection of the light absorbing layer 5 on the reflective film 2 covers the edge of the through hole 21, that is, light leaking from the gap between the elastic block 4 and the reflective film 2 can be absorbed by the light absorbing layer 5, an area of a surface of the elastic block 4 facing the reflective film 2 is smaller than an area of a cross section of the through hole in a direction parallel to the reflective film (slightly smaller, that is, a difference between an area of a surface of the elastic block 4 facing the reflective film 2 and an area of a cross section of the through hole in a direction parallel to the reflective film is smaller than a predetermined value, so as to avoid light leakage exceeding the light absorbing capability of the light absorbing layer, thereby effectively avoiding light leakage caused by mechanical vibration, In reliability tests such as various environmental temperature changes, the elastic blocks apply force to the reflecting film material, and poor adhesion of the reflecting film material to the light guide plate due to the elastic blocks is effectively prevented.
The embodiment also provides a display device comprising the backlight module.
Through set up on the reflection membrane material 2 a plurality of with the through-hole 21 of elasticity piece 4 one-to-one is about to reflect and carries out the fretwork setting with the position that elasticity piece 4 corresponds on the membrane material 2, in-process such as mechanical vibration, reliability experiment, reduces the contact between elasticity piece 4 and the reflection membrane material 2 to avoided reflection membrane material 2 because elasticity piece 4 arouse and light guide plate 1 between paste bad, avoided the light leak.
The display device may be: any product or component with a display function, such as a liquid crystal television, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, and the like, wherein the display device further comprises a flexible circuit board, a printed circuit board, and a back plate 3.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A backlight module comprises a back plate and a light guide plate accommodated in the back plate, wherein the light guide plate comprises a light incoming surface and a light outgoing surface which are arranged adjacently, and a plurality of side surfaces which are adjacent to the light incoming surface and/or the light outgoing surface; it is characterized in that the preparation method is characterized in that,
the reflecting film material is provided with a plurality of through holes which are in one-to-one correspondence with the elastic blocks, and the orthographic projection of each elastic block on the corresponding reflecting film material is positioned in the through hole.
2. The backlight module as claimed in claim 1, wherein a surface of the elastic block facing the reflective film is a reflective surface.
3. A backlight module according to claim 1, wherein the elastic blocks are made of light absorbing material, or the outer surfaces of the elastic blocks are coated with light absorbing material.
4. A backlight module according to claim 3, wherein the outer surface of the elastic block is black.
5. The backlight module as claimed in claim 1, wherein the outer surface of the elastic block is yellow, so that blue light irradiated on the elastic block is converted into white light.
6. The backlight module according to claim 3 or 5, wherein a light absorbing layer is disposed between the back plate and the elastic blocks, and an orthogonal projection of the through holes corresponding to the elastic blocks on the back plate is located in the light absorbing layer.
7. The backlight module as claimed in claim 6, wherein the light absorbing layer is a light blocking tape.
8. The backlight module as claimed in claim 3 or 5, wherein a light absorbing layer is disposed on the back plate at a peripheral region of the elastic block, and an orthographic projection of an edge of the light absorbing layer away from the elastic block on the corresponding reflective film is located at a periphery of the through hole corresponding to the elastic block.
9. The backlight module according to claim 1, wherein the shape of the cross section of the through hole in the direction parallel to the reflective film conforms to the shape of the surface of the elastic block facing the reflective film.
10. A display device comprising the backlight module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115280.6A CN111175880A (en) | 2020-02-25 | 2020-02-25 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010115280.6A CN111175880A (en) | 2020-02-25 | 2020-02-25 | Backlight module and display device |
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| Publication Number | Publication Date |
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Cited By (1)
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| CN116381987A (en) * | 2023-05-31 | 2023-07-04 | 惠科股份有限公司 | Backlight module and display device |
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| CN201166761Y (en) * | 2008-04-03 | 2008-12-17 | 北京京东方光电科技有限公司 | Backlight source module for LCD device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116381987A (en) * | 2023-05-31 | 2023-07-04 | 惠科股份有限公司 | Backlight module and display device |
| CN116381987B (en) * | 2023-05-31 | 2023-08-25 | 惠科股份有限公司 | Backlight module and display device |
| US12210183B2 (en) | 2023-05-31 | 2025-01-28 | HKC Corporation Limited | Backlight module and display device |
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Application publication date: 20200519 |
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