CN116500828A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN116500828A CN116500828A CN202310424909.9A CN202310424909A CN116500828A CN 116500828 A CN116500828 A CN 116500828A CN 202310424909 A CN202310424909 A CN 202310424909A CN 116500828 A CN116500828 A CN 116500828A
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Classifications
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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
- G02F1/133608—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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- 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
- G02F1/133606—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
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention relates to a display device and a backlight module thereof, wherein the backlight module comprises: the LED lamp comprises a bottom frame, a reflecting film, a lamp strip and an optical film, wherein a luminous groove is formed in one face of the bottom frame, the reflecting film is arranged at the bottom of the luminous groove, the lamp strip is connected with the inner side wall of the luminous groove, the lamp strip and the reflecting film are arranged at intervals, a plurality of LED lamp beads are arranged on one face of the lamp strip, far away from the inner side wall of the luminous groove, of the lamp strip, and the optical film and the lamp strip are arranged at intervals. The light emitted by each LED lamp bead can be uniformly dispersed to the light reflecting films and the optical films on two sides, the light emitted by each LED lamp bead can be reflected and scattered to the optical films by the light reflecting films, and is guided out through the optical films, so that the uniformity of light emitting rays is good, the light emitting of each LED lamp bead is not easy to deviate, the light leakage phenomenon is avoided, the display effect of the display device is improved, and the quality of the backlight module and the display device is improved.
Description
Technical Field
The present invention relates to backlight modules, and particularly to a backlight module and a display device.
Background
The backlight module is a luminous component for the display device, is used as a luminous source of the display device, and provides a light source for the display device, so that the display function of the display device is realized, along with the development of technology, the display device is increasingly gridded and intelligent, more consumption requirements of people can be met, meanwhile, the requirements of people on the overall cost performance of the backlight module and the display device are also increasingly high, the backlight module comprises a direct type backlight module and a side-in type backlight module, wherein the side-in type backlight module is provided with the light source on the side wall, and then the side-in type backlight module is matched with the light guide effect of the light guide plate and the reflective membrane to obtain the side-in type backlight module, and the side-in type backlight module has the advantages of compact structure and lighter weight.
However, in the structure of the side-in backlight module, the LED light bars and the light guide plates need to be strictly aligned, so that the light emitted by the LED light bars is LED out through the light guide plates, the positions of the LED light bars and the light guide plates in the existing side-in backlight module are easy to deviate, the light leakage phenomenon is easy to occur, the display effect of the display device is greatly affected, and the quality of the backlight module and the display device is reduced.
Disclosure of Invention
Based on this, it is necessary to provide a backlight module and a display device.
The technical scheme for solving the technical problems is as follows: a backlight module, comprising:
a bottom frame, wherein a luminous groove is formed in one surface of the bottom frame;
the light reflecting film is arranged at the bottom of the light emitting groove;
the light bar is connected with the inner side wall of the luminous groove, the light bar and the reflecting film are arranged at intervals, one surface of the light bar, which is far away from the inner side wall of the luminous groove, is provided with a plurality of LED (light-emitting diode) lamp beads, and the LED lamp beads are arranged at intervals; and
The optical film is connected with the inner side wall of the luminous groove, and the optical film and the lamp strip are arranged at intervals.
In one embodiment, the optical film includes a diffusion film that is coupled to an inner sidewall of the light emitting channel.
In one embodiment, the optical film further comprises a light enhancement film, the light enhancement film is connected with the side wall of the light emitting groove, and one surface of the light enhancement film is connected with one surface of the diffusion film, which is far away from the light reflecting film.
In one embodiment, each LED lamp bead comprises a support, a chip and a fluorescent powder adhesive layer, the support is arranged on one surface, far away from the inner side wall of the luminous groove, of the lamp strip, a material placing groove is formed in the support, a first bonding pad and a second bonding pad are arranged at the bottom of the material placing groove, the first bonding pad and the second bonding pad are arranged at intervals, the chip is arranged in the material placing groove, the chip is respectively electrically connected with the first bonding pad and the second bonding pad, and the fluorescent powder adhesive layer is arranged in the material placing groove and is coated outside the chip.
In one embodiment, the fluorescent powder adhesive layer is provided with an arc-shaped surface, and the arc-shaped surface is at least partially recessed inside the material placing groove.
In one embodiment, the device further comprises a transparent light guide adhesive layer, wherein the transparent light guide adhesive layer is connected with the arc-shaped surface, and the transparent light guide adhesive layer is at least partially protruded out of the outer side of the material placing groove.
In one embodiment, a difference between a spacing between the light reflective film and the light bar and a spacing between the optical film and the light bar is less than a first predetermined spacing difference.
In one embodiment, the inner side wall of the luminous groove is provided with a reflective coating, and the reflective coating and the light bar are symmetrically arranged with the central axis of the luminous groove.
In one embodiment, the thickness of the reflective coating gradually increases from an end near the bottom of the light-emitting groove to an end far from the bottom of the light-emitting groove.
A display device, comprising: the backlight module described in any of the above embodiments.
Compared with the prior art, the invention has at least the following advantages:
the bottom frame with the luminous groove can be used for accommodating the reflecting film, the lamp strip and the optical diaphragm, and particularly, the lamp strip is arranged on the inner side wall of the luminous groove, each LED lamp bead on the lamp strip can emit light sources from the side wall of the luminous groove, meanwhile, the reflecting film is arranged at the bottom of the luminous groove, the optical diaphragm is arranged on the inner side wall of the luminous groove, the reflecting film and the optical diaphragm are respectively arranged on two sides of the lamp strip, and the reflecting film and the optical diaphragm are respectively arranged at intervals with the lamp strip in the vertical direction of the luminous groove, so that a certain interval is reserved between the lamp strip and the reflecting film and the optical diaphragm, each LED lamp bead is reserved between the reflecting film and the optical diaphragm, so that light emitted by each LED lamp bead can be uniformly dispersed to the reflecting film and the optical diaphragm on two sides, the light emitted by the LED lamp bead can be reflected and scattered to the optical diaphragm, the light is guided out through the optical diaphragm, the uniformity of the light is good, the light guide plate is avoided, the light emitted by each LED lamp bead is not easy to deviate in the vertical direction, the light leakage of the backlight module is greatly improved, the display quality of the backlight device is greatly improved, and the display device is prevented.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment;
FIG. 2 is a schematic diagram of a portion of a backlight module according to an embodiment;
fig. 3 is a schematic structural diagram of an LED lamp bead of a backlight module according to an embodiment.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The technical solution of the present invention will be further described below with reference to the accompanying drawings of the embodiments of the present invention, and the present invention is not limited to the following specific embodiments.
It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., that indicate an azimuth or a positional relationship based on the directions or the positional relationships shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limitations of the present patent, and that the specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1, 2 and 3, a backlight module 10 includes a bottom frame 100, a reflective film 200, a light bar 300 and an optical film 400. A light-emitting groove 110 is formed on one surface of the bottom frame 100. The reflective film 200 is disposed at the bottom of the light emitting groove 110. The light bar 300 is connected with the inner side wall of the light-emitting groove 110, the light bar 300 and the reflective film 200 are arranged at intervals, a plurality of LED light beads 310 are arranged on one surface of the light bar 300 away from the inner side wall of the light-emitting groove 110, and the LED light beads 310 are arranged at intervals. The optical film 400 is connected to the inner sidewall of the light-emitting groove 110, and the optical film 400 and the light bar 300 are spaced apart from each other.
It should be noted that, the bottom frame 100 is a hollow frame structure with the light-emitting groove 110, the bottom frame 100 is rectangular, the light-emitting groove 110 can play a role in accommodating, the light-emitting groove 110 is a groove structure, and can be used for accommodating the reflective film 200, the light bar 300 and the optical film 400, the light bar 300 can be a flexible light bar 300 or a rigid light bar 300, and can be set according to specific production needs, specifically, by installing the light bar 300 on the inner side wall of the light-emitting groove 110, in this embodiment, the light bar 300 is installed on the central position of the inner side wall of the light-emitting groove 110, so that the light bar 300 is installed on the middle position of one side wall of the light-emitting groove 110, so that a certain distance is left between the light bar 300 and the top and bottom of the light-emitting groove 110 in the vertical direction, each LED light bead 310 on the light bar 300 can emit light from the side wall of the light-emitting groove 110, meanwhile, the bottom of the light-emitting groove 110 is provided with the reflective film 200, the optical film 400 is arranged on the inner side wall of the light-emitting groove 110 near the top of the light-emitting groove 110, so that the optical film 400 and the light-reflecting film 200 are respectively arranged on the upper side and the lower side of the light bar 300, and the light-reflecting film 200 and the optical film 400 are respectively arranged with the light bar 300 at intervals in the vertical direction of the light-emitting groove 110, so that a certain interval is reserved between the light bar 300 and the light-reflecting film 200 and the optical film 400, a certain interval is reserved between each LED lamp bead 310 and the light-reflecting film 200 and the optical film 400, the light emitted by each LED lamp bead 310 can be uniformly dispersed to the light-reflecting film 200 and the optical film 400 on the two sides, the light emitted by each LED lamp bead 310 can be reflected and scattered to the optical film 400, and is guided out together through the optical film 400, the uniformity of the light-emitting light is good, the light-emitting effect is good, the arrangement of a light guide plate is avoided, the light-emitting of each LED lamp bead 310 is not easy to deviate, therefore, the light leakage phenomenon is avoided, the display effect of the display device is greatly improved, and the quality of the backlight module and the display device is improved.
Referring to fig. 1 and 2, in one embodiment, the optical film 400 includes a diffusion film 410, and the diffusion film 410 is connected to the inner sidewall of the light-emitting groove 110. It can be appreciated that the optical film 400 is provided with the diffusion film 410, and the diffusion film 410 can play a role in scattering the light emitted by the LED lamp beads 310 and the light emitted by the light emitting film, so that the light emission is uniform, and the light emitting effect is improved.
Referring to fig. 1 and 2, in one embodiment, the optical film 400 further includes a brightness enhancement film 420, the brightness enhancement film 420 is connected to a sidewall of the light-emitting groove 110, and one surface of the brightness enhancement film 420 is connected to a surface of the diffusion film 410 away from the light-reflecting film 200. It can be appreciated that by providing the brightness enhancement film 420, the brightness enhancement film 420 is overlapped above the diffusion film 410, so that the brightness enhancement film 420 can play a role in enhancing the luminous efficiency of the backlight module, and the appropriate brightness of the luminous source is ensured to be provided for the display device.
Referring to fig. 3, in one embodiment, each LED lamp bead 310 includes a bracket 311, a chip 312 and a fluorescent powder adhesive layer 313, the bracket 311 is disposed on a surface of the lamp strip 300, which is far away from the inner sidewall of the light-emitting slot 110, the bracket 311 is provided with a material placing slot, a first bonding pad and a second bonding pad are disposed at the bottom of the material placing slot, the first bonding pad and the second bonding pad are disposed at intervals, the chip 312 is disposed in the material placing slot, the chip 312 is electrically connected with the first bonding pad and the second bonding pad, respectively, and the fluorescent powder adhesive layer 313 is disposed in the material placing slot and is coated outside the chip 312. It can be appreciated that the bracket 311 is of a bracket 311 structure with a bowl-cup-shaped material placing groove, a first bonding pad and a second bonding pad are arranged at the bottom of the material placing groove and can be respectively used as an anode bonding pad and a cathode bonding pad, an anode pin and a cathode pin are arranged on the outer side wall of the bracket 311 and are used for being electrically connected with an external power supply device, then the first bonding pad and the second bonding pad are powered, the chip 312 is arranged in the material placing groove, and the chip 312 is electrically connected with the first bonding pad and the second bonding pad through a bonding alloy wire, so that the circuit is conducted, the normal luminescence of the chip 312 is ensured, the fluorescent powder glue layer 313 is formed by coating and filling fluorescent powder glue into the material placing groove, the chip 312 can be protected, fluorescent powder can be prepared according to specific color development requirements, the fluorescent powder is matched with the chip 312, and the color development requirements can be met, and the normal luminescence of the LED lamp beads 310 is ensured.
Referring to fig. 3, in one embodiment, the phosphor glue layer 313 is provided with an arc surface 313a, and the arc surface 313a is at least partially recessed inside the placement groove. It can be appreciated that the fluorescent powder glue layer 313 is configured into a concave cup shape, specifically, when the fluorescent powder glue is coated, the volume of the fluorescent powder glue layer 313 can be filled with the fluorescent powder glue amount smaller than that of the placing groove, after the fluorescent powder glue layer 313 is dried, the arc-shaped fluorescent powder glue layer 313 can be formed, the fluorescent powder glue layer 313 is recessed towards the inner side of the placing groove, thus, after passing through the fluorescent powder glue layer 313, the light emitted by the chip 312 is LED out through the arc-shaped surface 313a, the recessed arc-shaped surface 313a can lead the light emitted by the chip 312 to two sides of the bracket 311, the middle part of the bracket 311 is reduced to emit light, thus, the light emitted by the LED lamp beads 310 can be better conducted to the upper side and the lower side of the LED lamp beads 310, the reflective film 200 and the optical film 400 can be better and more intensively LED out, the light is more concentrated, meanwhile, the light emitting angle of the LED lamp beads 310 can be reduced, a certain light leakage preventing effect can be achieved, the luminous efficiency can be improved, and the practicability is good.
Referring to fig. 1, fig. 2, and fig. 3, in one embodiment, the apparatus further includes a transparent light guiding glue layer 314, the transparent light guiding glue layer 314 is connected to the arc surface 313a, and the transparent light guiding glue layer 314 is at least partially protruded outside the material placing groove. It can be appreciated that, through being provided with transparent light guide glue film 314 in the outside of phosphor powder glue film 313, and transparent light guide glue film 314 protrusion sets up in the outside of putting the silo, so, can be provided with bellied transparent light guide glue film 314 structure in the outside of phosphor powder glue film 313, because phosphor powder glue film 313 is provided with arcwall face 313a, be favorable to increasing the area of contact with transparent light guide glue film 314, thereby greatly increased transparent light guide glue film 314 and phosphor powder glue film 313's cohesion, be favorable to improving the structural stability of this lamp pearl, in addition, through being provided with bellied transparent light guide glue film 314, can play the diffusion effect to the light that chip 312 sent, make the light that chip 312 sent more even, soft, the luminous effect is better.
In one embodiment, the difference between the distance between the reflective film 200 and the light bar 300 and the distance between the optical film 400 and the light bar 300 is smaller than a first predetermined distance difference. It can be appreciated that by strictly defining the distance between the reflective film 200 and the light strip 300 in the vertical direction and the distance between the optical film 400 and the light strip 300 in the vertical direction, the distance between the reflective film 200 and the optical film 400 and the light strip 300 can be ensured to be moderate and uniform by setting the difference smaller than the first preset distance, for example, the first preset distance difference is 0 mm-5 mm, so that the light strip 300 can be ensured to be centrally arranged between the reflective film 200 and the optical film 400, the light emitted by the LED light beads 310 can be ensured to be uniformly diffused to two sides, and the light can be well reflected by the reflective film 200 and the optical film 400, so that the light emission is ensured to be uniform and the light emission effect is good.
Referring to fig. 1, in one embodiment, a reflective coating 111 is disposed on an inner sidewall of the light-emitting groove 110, and the reflective coating 111 and the light bar 300 are disposed symmetrically with respect to each other about a central axis of the light-emitting groove 110. It can be appreciated that in this embodiment, the bottom frame 100 is rectangular, the light bar 300 is disposed on a side wall of the light emitting groove 110 of the bottom frame 100, and the reflective coating 111 is disposed on an inner side wall of the light emitting groove 110 opposite to the light bar 300, so that light parallel to the reflective film 200 and the optical film 400 emitted by the LED lamp beads 310 can be reflected, and light parallel to the reflective film 200 and the optical film 400 emitted by the LED lamp beads 310 can be scattered and reflected onto the reflective film 200 or the optical film 400, thereby avoiding light loss, being beneficial to improving light emitting efficiency and improving production benefits of the backlight module. So, can form the decurrent reflective coating 111 of slope on the lateral wall that lamp strip 300 is relative, can reflect the reflective membrane 200 of being on a parallel with reflective membrane 200 and optical diaphragm 400 that LED lamp pearl 310 sent to the reflective membrane 200 of luminous groove 110 bottom, reflect to optical diaphragm 400 through reflective membrane 200, can scatter the reflection to the light that LED lamp pearl 310 sent well, simultaneously, can realize controlling the lateral wall luminous, be favorable to further improving luminous homogeneity and luminous effect to be favorable to improving subsequent display device's display effect.
In one embodiment, the reflective coating 111 is a silver reflective layer, and the conductive silver paste may be coated on the sidewall of the light-emitting groove 110, so as to form the reflective coating 111, where the silver reflective layer has a good reflective effect and is easy to process and form. In another embodiment, the reflective coating 111 includes a transparent adhesive layer and reflective particles, the transparent adhesive layer is disposed on the inner sidewall of the light-emitting groove 110, the transparent adhesive layer and the light bar 300 are disposed symmetrically with each other about the central axis of the light-emitting groove 110, and the reflective particles are disposed in the transparent adhesive layer. In this embodiment, the reflective particles are titanium dioxide particles and boron nitride particles, and the reflective particles are added into the transparent glue, uniformly mixed, and coated on the inner side wall of the light-emitting groove 110, so that the reflective coating 111 is formed on the inner side wall of the light-emitting groove 110, and the titanium dioxide particles and the boron nitride particles are white particles with high reflectivity, so that the cost is low, the processing and the forming are easy, the production cost of the backlight module is reduced, and the production benefit is improved.
In one embodiment, there is also provided a display apparatus including: the backlight module described in any of the above embodiments.
It is to be noted that, display device still includes power supply unit and display screen, and backlight unit and display screen fold in proper order establish, and the light that backlight unit sent is projected to the display screen, realizes the display function through the display screen, and power supply unit provides the electric energy for backlight unit and display screen, guarantees backlight unit and display device's normal work to realize the display function, backlight unit's light-emitting ray homogeneity is good, and avoids setting up the light guide plate, and the difficult deviation that appears of the light-emitting of each LED lamp pearl, thereby avoids appearing the light leak phenomenon, improves display device's display effect greatly, has improved backlight unit and display device's quality.
Compared with the prior art, the invention has at least the following advantages:
the bottom frame with the luminous groove can be used for accommodating the reflecting film, the lamp strip and the optical diaphragm, and particularly, the lamp strip is arranged on the inner side wall of the luminous groove, each LED lamp bead on the lamp strip can emit light sources from the side wall of the luminous groove, meanwhile, the reflecting film is arranged at the bottom of the luminous groove, the optical diaphragm is arranged on the inner side wall of the luminous groove, the reflecting film and the optical diaphragm are respectively arranged on two sides of the lamp strip, and the reflecting film and the optical diaphragm are respectively arranged at intervals with the lamp strip in the vertical direction of the luminous groove, so that a certain interval is reserved between the lamp strip and the reflecting film and the optical diaphragm, each LED lamp bead is reserved between the reflecting film and the optical diaphragm, so that light emitted by each LED lamp bead can be uniformly dispersed to the reflecting film and the optical diaphragm on two sides, the light emitted by the LED lamp bead can be reflected and scattered to the optical diaphragm, the light is guided out through the optical diaphragm, the uniformity of the light is good, the light guide plate is avoided, the light emitted by each LED lamp bead is not easy to deviate in the vertical direction, the light leakage of the backlight module is greatly improved, the display quality of the backlight device is greatly improved, and the display device is prevented.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. A backlight module, comprising:
a bottom frame, wherein a luminous groove is formed in one surface of the bottom frame;
the light reflecting film is arranged at the bottom of the light emitting groove;
the light bar is connected with the inner side wall of the luminous groove, the light bar and the reflecting film are arranged at intervals, one surface of the light bar, which is far away from the inner side wall of the luminous groove, is provided with a plurality of LED (light-emitting diode) lamp beads, and the LED lamp beads are arranged at intervals; and
The optical film is connected with the inner side wall of the luminous groove, and the optical film and the lamp strip are arranged at intervals.
2. The backlight module of claim 1, wherein the optical film comprises a diffusion film, the diffusion film being connected to an inner sidewall of the light-emitting groove.
3. The backlight module according to claim 2, wherein the optical film further comprises a light enhancement film, the light enhancement film is connected to a sidewall of the light-emitting groove, and one surface of the light enhancement film is connected to a surface of the diffusion film away from the light-reflecting film.
4. The backlight module of claim 1, wherein each LED lamp bead comprises a bracket, a chip and a fluorescent powder adhesive layer, the bracket is arranged on one surface of the lamp strip, which is far away from the inner side wall of the luminous groove, the bracket is provided with a material placing groove, a first bonding pad and a second bonding pad are arranged at the bottom of the material placing groove, the first bonding pad and the second bonding pad are arranged at intervals, the chip is arranged in the material placing groove, the chip is respectively electrically connected with the first bonding pad and the second bonding pad, and the fluorescent powder adhesive layer is arranged in the material placing groove and is coated outside the chip.
5. The backlight module according to claim 4, wherein the phosphor glue layer is provided with an arc surface, and the arc surface is at least partially recessed inside the material accommodating groove.
6. The backlight module of claim 5, further comprising a transparent light guiding glue layer, wherein the transparent light guiding glue layer is connected to the arc surface, and the transparent light guiding glue layer is at least partially protruded outside the material placing groove.
7. The backlight module according to claim 1, wherein a difference between a distance between the light reflecting film and the light bar and a distance between the optical film and the light bar is smaller than a first predetermined distance difference.
8. A backlight module according to any one of claims 1 to 7, wherein the inner side wall of the light-emitting groove is provided with a reflective coating, and the reflective coating and the light bar are disposed symmetrically with respect to each other about the central axis of the light-emitting groove.
9. The backlight module according to claim 8, wherein the thickness of the reflective coating gradually increases from an end near the bottom of the light-emitting groove to an end far from the bottom of the light-emitting groove.
10. A display device, comprising: a backlight module according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310424909.9A CN116500828A (en) | 2023-04-20 | 2023-04-20 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310424909.9A CN116500828A (en) | 2023-04-20 | 2023-04-20 | Backlight module and display device |
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| WO2013061886A1 (en) * | 2011-10-28 | 2013-05-02 | シャープ株式会社 | Lighting device, display device, and television receiver device |
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| CN216434594U (en) * | 2021-10-26 | 2022-05-03 | 惠州视维新技术有限公司 | LED lamp bead and side-in type backlight module |
| CN216901254U (en) * | 2022-04-08 | 2022-07-05 | 惠州伟志电子有限公司 | Display device and backlight module thereof |
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| WO2013061886A1 (en) * | 2011-10-28 | 2013-05-02 | シャープ株式会社 | Lighting device, display device, and television receiver device |
| KR20130104026A (en) * | 2012-03-12 | 2013-09-25 | 서울반도체 주식회사 | Light emitting diode package |
| CN112666757A (en) * | 2020-12-31 | 2021-04-16 | 广东晶科电子股份有限公司 | Multilayer structure's luminescent device and backlight unit |
| CN113707794A (en) * | 2021-09-23 | 2021-11-26 | 安徽芯瑞达科技股份有限公司 | Mini large-angle LED lamp bead |
| CN216434594U (en) * | 2021-10-26 | 2022-05-03 | 惠州视维新技术有限公司 | LED lamp bead and side-in type backlight module |
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