CN113687539A - Backlight module and display terminal - Google Patents
Backlight module and display terminal Download PDFInfo
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- CN113687539A CN113687539A CN202110938083.9A CN202110938083A CN113687539A CN 113687539 A CN113687539 A CN 113687539A CN 202110938083 A CN202110938083 A CN 202110938083A CN 113687539 A CN113687539 A CN 113687539A
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- light guide
- light
- guide plate
- backlight
- backlight module
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- 229910052709 silver Inorganic materials 0.000 description 2
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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
- G02F1/133606—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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- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0028—Light guide, e.g. taper
-
- 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
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
-
- 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
-
- 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
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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 application provides a backlight module and a display terminal; the backlight module comprises a backlight source and a light guide component, the light guide component comprises a light guide plate and a light guide piece, the backlight source is positioned on one side of the light guide plate, which is far away from the light emitting surface, the light guide piece is positioned on the light emitting side of the backlight source, the light guide plate is positioned on the light emitting side of the light guide piece, emergent light of the backlight source enters the light guide plate through the light guide piece, and in the overlooking direction of the backlight module, the orthographic projection of the backlight source is at least partially overlapped with the orthographic projection of the light guide piece or/and the light guide plate; this application is through setting up the backlight in the one side of keeping away from the plain noodles at the light guide plate to with the emergent light of backlight in with the help of leaded light spare, reduce the backlight in the shared space of backlight unit's frame position, solved present stage display screen and difficult further reduced the technical problem of frame width.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display terminal.
Background
At present, the development trend in the display field is narrow frame and full screen, which requires that the frame of each module of the display screen is narrower and narrower. However, because the backlight source exists in the backlight module of the display screen, especially in the lateral backlight module, the backlight source needs to occupy a larger frame space, the frame width of the backlight module is difficult to further reduce, the frame width of the display screen cannot be further reduced, and the development of an extremely narrow frame display screen or a full screen is limited.
Therefore, how to further reduce the frame width of the display screen in the current narrow-frame display screen is an urgent problem to be solved.
Disclosure of Invention
The application provides a backlight unit and display terminal to improve the technical problem that the frame width of current display screen can't further reduce.
In order to solve the technical problem, the technical scheme provided by the application is as follows:
the application provides a backlight module, which comprises a backlight source and a light guide component, wherein the light guide component comprises a light guide plate and a light guide piece, the backlight source is positioned on one side of the light guide plate, which is far away from a light emitting surface, the light guide piece is positioned on the light emitting side of the backlight source, the light guide plate is positioned on the light emitting side of the light guide piece, and emergent light of the backlight source enters the light guide plate through the light guide piece;
in the overlooking direction of the backlight module, the orthographic projection of the backlight source is at least partially overlapped with the orthographic projection of the light guide piece or/and the light guide plate.
In the backlight module, the light guide piece comprises a light guide cylinder, the first end of the light guide cylinder is connected with the light emergent side of the backlight source, and the second end of the light guide cylinder is connected with the light incident side of the light guide plate;
the light guide tube is internally provided with a light guide channel, and emergent light of the backlight source enters the light guide plate through the light guide channel.
In the backlight module of this application, the leaded light section of thick bamboo is close to be provided with first reflector layer on the medial surface of leaded light passageway.
In the backlight module, the light-emitting side of the backlight source is embedded into the first end of the light guide cylinder, and the light-entering side of the light guide plate is embedded into the second end of the light guide cylinder;
the first end of the light guide cylinder is tightly attached to the light emitting side of the backlight source, and the second end of the light guide cylinder is tightly attached to the light incident side of the light guide plate.
In the backlight module, the light guide part comprises a light guide block, a first end of the light guide block is connected with the light guide plate, a second end of the light guide block is bent to one side far away from a light emergent surface of the light guide plate, and the second end of the light guide block is connected with the light emergent side of the backlight source;
and emergent rays of the backlight source penetrate through the light guide block and enter the light guide plate.
In the backlight module of the application, the surface of the light guide block is provided with a second reflection layer, and the second reflection layer is positioned on the side face of the light guide block except for the first end and the second end.
In the backlight module of the application, the backlight module further comprises a back frame, the back frame is arranged on one side of the light guide plate, which is far away from the light emitting surface, a first notch is formed in one side of the light guide piece, which faces the light guide plate, and the back frame extends into the first notch;
the light guide part is arranged in the first notch, and the light guide part is fixed with the back frame through the fixing part.
In the backlight module, the back frame comprises a main body part and a bending part, the main body part is positioned on one side of the light guide plate, which is far away from the light emergent surface, the first end of the bending part is connected with the main body part, and the second end of the bending part is bent towards one side of the light emergent surface of the light guide plate;
the main body part is provided with a second notch, and the light guide part penetrates through the second notch.
In the backlight module of the application, the backlight module further comprises an optical film layer arranged on the light-emitting surface of the light guide plate, and a cushion layer is arranged on the light guide piece;
the thickness of the cushion layer is the same as that of the optical film layer in the direction perpendicular to the light-emitting surface of the light guide plate.
The application also provides a display terminal, including terminal main part and above-mentioned backlight unit, backlight unit with terminal main part makes up as an organic whole.
Has the advantages that: this application is through setting up the backlight in the one side of the play plain noodles is kept away from to the light guide plate, and with the help of the emergent light of backlight leading-in to the light guide plate of leaded light spare, reduce the shared space in backlight unit's frame position, realize the effect of narrow frame, and because the existence of leaded light spare, increased the distance between the income plain noodles of backlight and light guide plate, make the light mixed light that the backlight sent more abundant, thereby can reduce luminance and color difference, the uneven phenomenon of bright dark that appears when effectively improving the demonstration.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a first structure of a backlight module according to the present application;
FIG. 2 is a schematic view of a second structure of the backlight module of the present application;
FIG. 3 is a schematic view of a third structure of the backlight module of the present application;
FIG. 4 is a schematic view of a first structure of a light guide tube according to the present application;
FIG. 5 is a schematic structural diagram of a light guide block according to the present application;
FIG. 6 is a schematic diagram of a fourth structure of the backlight module of the present application;
FIG. 7 is a schematic plan view of a back frame according to the present application;
FIG. 8 is a schematic view of a second structure of the light guide tube of the present application;
fig. 9 is a schematic structural diagram of an optical film layer according to the present disclosure.
Description of reference numerals:
the backlight module comprises a backlight source 100, a light guide plate 200, a light emitting surface 210, a reflecting surface 220, a third reflecting layer 230, a light guide 300, a light guide cylinder 310, a light guide channel 311, a first reflecting layer 312, a light guide block 320, a second reflecting layer 321, a first notch 330, a fixing piece 340, a back frame 400, a main body part 410, a second notch 411, a bending part 420, a vertical part 421, a horizontal part 422, an optical film layer 500, a lower diffusion sheet 510, a prism sheet 520, an upper diffusion sheet 530 and a gasket 600.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the invention, are given by way of illustration and explanation only, and are not intended to limit the scope of the invention. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
With the development of liquid crystal display technology, users demand more functions and fashionable appearances for electronic products such as mobile phones, tablet computers, cameras and the like. At present, the development trend of electronic products is full screen, and to Liquid Crystal Display (LCD), display panel's frame is more and more narrow among the module, and wherein, the frame width of non-binding district side is within 1mm, and the frame width of binding district side is within 3 mm.
Besides the frame width of the display panel, another important influence factor influencing the frame width of the LCD is the frame width of the backlight module. In the side income formula backlight unit, the backlight generally sets up the frame position at the module, and if the module frame with the backlight side reduces narrowly, leads to the backlight to produce the luminous effect (hotspot) of bayonet side easily-the picture income light position that is close to the display device frame appears light and shade alternate phenomenon, leads to showing uneven demonstration abnormal problems. Therefore, how to further reduce the module frame on the backlight side is an urgent problem to be solved at the present stage. The present application proposes the following solutions based on the above technical problems.
Referring to fig. 1 to 9, the present application provides a backlight module including a backlight source 100 and a light guide assembly including a light guide plate 200 and a light guide 300. The light guide plate 200 includes a light emitting surface 210 and a reflecting surface 220, the light emitting surface 210 and the reflecting surface 220 are parallel and opposite to each other, and the light emitted from the backlight source 100 is emitted from the light emitting surface 210 to the display panel.
In this embodiment, the backlight source 100 is located on a side of the light guide plate 200 away from the light exit surface 210 and close to an edge of the light guide plate 200, that is, the backlight source 100 is located on a side of the light guide plate 200 having the reflective surface 220. The light guide member 300 is located at the light emitting side of the backlight source 100, the light guide plate 200 is located at the light emitting side of the light guide member 300, and the emergent light of the backlight source 100 enters the light guide plate 200 through the light guide member 300.
In the embodiment, the emergent light of the backlight source 100 enters the light guide 300 along the first direction a1, passes through the light guide 300, enters the light guide plate 200 along the second direction a2, and exits from the light exit surface 210 of the light guide plate 200 along the third direction A3. The first direction a1 is a horizontal direction from the light guide plate 200 to the light guide 300, and the second direction a2 is opposite to the first direction a1, i.e., the second direction a2 is a horizontal direction from the light guide 300 to the light guide plate 200. The third direction A3 is a vertical direction perpendicular to the first and second directions a1 and a2 and directed toward the light emitting surface 210 by the reflective surface 220.
In the embodiment of the application, the backlight source 100 is disposed on the side of the light guide plate 200 away from the light emitting surface 210, and the emitted light of the backlight source 100 is guided into the light guide plate 200 by the light guide member 300, so that the space occupied by the backlight source 100 in the frame position of the backlight module is reduced, and the effect of a narrow frame is achieved. Moreover, due to the existence of the light guide member 300, the distance between the backlight source 100 and the light incident surface of the light guide plate 200 is increased, so that the light emitted by the backlight source 100 is more sufficiently mixed, the brightness and color difference can be reduced, and the Hotspot Mura (uneven brightness) phenomenon during display can be effectively improved.
In this embodiment, in the top view direction of the backlight module, the orthographic projection of the backlight source 100 is at least partially overlapped with the orthographic projection of the light guide member 300 or/and the light guide plate 200, so that the backlight source 100 does not exceed the projection range of the light guide plate 200 and the light guide member 300 on the top view of the backlight module, thereby reducing the frame space occupied by the backlight source 100 and the light guide member 300 as much as possible and realizing the effect of an ultra-narrow frame. For example, as shown in fig. 1, in the top view direction of the backlight module, the orthographic projection of the backlight source 100 is located within the orthographic projection range of the light guide 300, that is, for the backlight source 100, the orthographic projection of the backlight source 100 and the orthographic projection of the light guide 300 are all overlapped. Alternatively, as shown in fig. 2, in the top view direction of the backlight module, the orthogonal projection of the backlight source 100 is located within the orthogonal projection range of the light guide plate 200. Alternatively, as shown in fig. 3, in the top view direction of the backlight module, the backlight source 100 crosses the connection position between the light guide 300 and the light guide plate 200, that is, a part of the orthogonal projection of the backlight source 100 falls within the orthogonal projection of the light guide 300, and another part falls within the orthogonal projection of the light guide plate 200.
It should be noted that the specific position of the backlight source 100 on the side of the reflection surface 220 of the light guide plate 200 is related to the dimension specification of the backlight module, that is, the overlapping relationship between the backlight source 100 and the orthographic projections of the light guide member 300 and the light guide plate 200 in the top view direction of the backlight module depends on the dimension specification of the backlight module, and the embodiment of the present application does not specifically limit this.
The technical solution of the present application will now be described with reference to specific embodiments. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
In the backlight module of the present application, please refer to fig. 4, the light guide member 300 includes a light guide tube 310, a first end of the light guide tube 310 is connected to the light emitting side of the backlight source 100, a second end of the light guide tube 310 is connected to the light incident side of the light guide plate 200, a light guide channel 311 is disposed in the light guide tube 310, and the emergent light of the backlight source 100 enters the light guide plate 200 through the light guide channel 311.
In this embodiment, the light guide cylinder 310 may be made of a hard or flexible non-transparent material as long as the light guide function is achieved.
In the embodiment of the present application, by providing the light guide tube 310, the emergent light of the backlight source 100 is guided into the light guide plate 200 through the light guide channel 311 in the light guide tube 310, on one hand, the backlight source 100 is prevented from being disposed on the side of the light guide plate 200 to occupy a larger frame space, and the frame width of the backlight module is reduced, on the other hand, the light guide tube 310 can also play a role in receiving the emergent light of the backlight source 100, and the backlight leakage phenomenon is reduced.
In the backlight module of the present application, a first reflective layer 312 is disposed on an inner side surface of the light guide cylinder 310 close to the light guide channel 311. In this embodiment, the light guide tube 310 is a hollow shell structure with two through ends, wherein the inner side surface of the shell is the wall surface of the cavity of the light guide channel 311.
In this embodiment, the first reflective layer 312 may be a metal plating layer or a multi-layer bubble film or other film structure that can perform a total reflection function.
In this embodiment, the light guide cylinder 310 may be made of a flexible non-transparent material, such as a film material or an optical fiber material, and the light guide cylinder 310 is formed by coating or evaporating a reflective coating on the surface of the film by the first reflective layer 312 and then curling.
In this embodiment, the light guide tube 310 may be made of a rigid transparent or non-transparent material, such as glass, plastic, etc., and the first reflective layer 312 is a reflective coating coated on the inner side of the glass that has been formed into a tube shape.
This application embodiment is through setting up first reflection stratum 312 on the medial surface at a light guide tube 310, makes the emergent light of backlight 100 can carry out efficient reflection and mixed light with the help of first reflection stratum 312 after getting into in a light guide tube 310, reduces the light loss rate and effectively improves Hotspot Mura (bright dark inequality) phenomenon.
In the backlight module of this application, the light-emitting side embedding of backlight 100 inside the first end of a light guide tube 310, the light-entering side embedding of light guide plate 200 inside the second end of a light guide tube 310 to reduce the light leak phenomenon of the junction between backlight 100 and a light guide tube 310, between a light guide tube 310 and a light guide plate 200, also help improving the connection structure stability between backlight 100, a light guide tube 310 and a light guide plate 200 three simultaneously.
In this embodiment, the shape and area of the first end of the light guide cylinder 310 are the same as those of the light exit side of the backlight 100. The shape and area of the second end of the light guide tube 310 are the same as those of the light incident side of the light guide plate 200. Therefore, the inner side wall of the light guide tube 310 is tightly attached to the light-emitting side of the backlight source 100 and the light-entering side of the light guide plate 200, thereby further reducing the light leakage at the joint of the backlight source 100, the light guide tube 310 and the light guide plate 200 and improving the display effect.
In the backlight module of the present application, referring to fig. 5, the light guide 300 includes a light guide block 320, a first end of the light guide block 320 is connected to the light guide plate 200, a second end of the light guide block 320 is bent to a side away from the light emitting surface 210 of the light guide plate 200, and a second end of the light guide block 320 is connected to the light emitting side of the backlight source 100. The emergent light of the backlight source 100 passes through the light guide block 320 and enters the light guide plate 200.
In this embodiment, the light guide block 320 may be a solid block structure made of a transparent material, such as glass or an optical fiber material, so that the emergent light of the backlight 100 can be transmitted through the solid light guide block 320.
In this embodiment, the shape and area of the first end of the light guide block 320 are the same as those of the light incident side of the light guide plate 200, the shape and area of the second end of the light guide block 320 are the same as those of the light emergent side of the backlight source 100, and the light guide block 320 is tightly attached to the backlight source 100 and the light guide plate 200, so as to further reduce the light leakage phenomenon.
In this embodiment, the light guide block 320 may be integrally formed with the light guide plate 200, so as to avoid a contact surface between the light guide block 320 and the light guide plate 200, and reduce an increase in light loss due to the contact surface.
In the backlight module of the present application, a second reflective layer 321 is disposed on a surface of the light guide block 320, and the second reflective layer 321 is located on a side surface of the light guide block 320 except for the first end and the second end. In this embodiment, the second reflective layer 321 may have a metal reflective layer with high reflectivity, such as a metal material, e.g., Al, Ag, etc.
In this embodiment, the second reflective layer 321 is disposed on the surface of the light guide block 320, and the light emitted from the inside of the light guide block 320 is reflected back to the inside of the light guide block 320, so as to reduce the light leakage phenomenon of the backlight source 100 at the light guide block 320, improve the display brightness, and improve the display effect.
In the display back plate of the present application, please refer to fig. 1 to 3, the backlight module further includes a back frame 400, wherein the back frame 400 is disposed on a side of the light guide plate 200 away from the light emitting surface 210. The back frame 400 includes a planar metal plate providing a mounting base for the light guide plate 200, a third reflective layer 230 is disposed on the reflective surface 220 of the light guide plate 200, and the third reflective layer 230 is attached to a side surface of the back frame 400 facing the light guide plate 200.
In this embodiment, the third reflective layer 230 may be a metal reflective sheet with high light reflectivity, such as an Al or Ag metal sheet.
In this embodiment, a first notch 330 is formed on a side of the light guide 300 facing the light guide plate 200, and the back frame 400 extends into the first notch 330. The first notch 330 is a middle gap formed by bending the light guide 300 from the backlight source 100 to the light guide plate 200, in other words, the light guide 300 forms a U-shaped structure when bending from the backlight source 100 to the light guide plate 200, and the first notch 330 is an opening of the U-shaped structure. In this embodiment, the back frame 400 is extended into the first notch 330, so that the first notch 330 can perform a good positioning limiting function on the back frame 400, and the combination stability between the back frame 400 and the light guide plate 200 is improved.
In this embodiment, the light guide 300 is provided with a fixing member 340 in the first notch 330, and the light guide 300 is fixed to the back frame 400 through the fixing member 340. The fixing member 340 may include a double-sided film, a first side of which is attached to a groove wall of the first notch 330, and a second side of which is attached to a side of the back frame 400 facing the light guide plate 200. This embodiment is fixed leaded light spare 300 and back frame 400 through setting up two-sided film, makes difficult dislocation between leaded light spare 300 and back frame 400, the light guide plate 200 to form good overall structure, the leaded light effect is more stable.
In the backlight module of the present application, referring to fig. 6, the back frame 400 includes a main body portion 410 and a bending portion 420, the main body portion 410 is located on a side of the light guide plate 200 away from the light exit surface 210, a first end of the bending portion 420 is connected to the main body portion 410, and a second end of the bending portion 420 is bent toward the light exit surface 210 side of the light guide plate 200.
In this embodiment, the main body 410 is a planar metal plate, and the bent portion 420 is a bent metal plate integrally formed with the main body 410. The main body 410 is fixedly attached to one side of the reflective surface 220 of the light guide plate 200, the bent metal plate includes a vertical portion 421 perpendicular to the main body 410 and a horizontal portion 422 perpendicular to the vertical portion 421, and the horizontal portion 422 extends horizontally from the vertical portion 421 to one side of the light guide plate 200. The horizontal portion 422 is located at one side of the light emitting surface 210 of the light guide plate 200, and the extending width of the horizontal portion 422 towards one side of the light guide plate 200 does not exceed the connecting position of the light guide member 300 and the light guide plate 200, so as to further reduce the frame width of the back frame 400.
In this embodiment, referring to fig. 7, the main body 410 is provided with a second notch 411, the second notch 411 is in a strip shape, and the light guide 300 is horizontally inserted into the second notch 411, so that the first end and the second end of the light guide 300 can be respectively located at two different sides of the back frame 400. The position of the maximum bending depth of the light guide 300 is embedded in the second notch 411, so that the back frame 400 further limits the position of the light guide 300, and the position stability of the light guide 300 is improved.
In this embodiment, referring to fig. 8, the width of the light guide 300 at the maximum bending depth position may be smaller than the width of other portions, and the width is a width along the extension direction of the splicing line of the light guide 300 and the light guide plate 200. In the present embodiment, the light guide 300 is taken as the light guide cylinder 310 for example, as shown in fig. 8, it should be noted that the present embodiment is also applicable to the case where the light guide 300 is the light guide block 320, and the structure thereof is similar to that of fig. 8, and is not repeated herein.
Correspondingly, in the extending direction of the splicing line of the light guide 300 and the light guide plate 200, the length of the second notch 411 is equal to the width of the light guide 300 at the position of the maximum bending depth. That is, in the extending direction of the splicing line between the light guide 300 and the light guide plate 200, the length of the second notch 411 is smaller than the length of the main body 410, so as to reduce the ratio of the opening length of the second notch 411 on the main body 410, and maintain the structural strength and stability of the main body 410.
In the backlight module of the present application, please refer to fig. 6 and 9, fig. 9 is a schematic structural diagram of an optical film 500, the backlight module further includes the optical film 500 disposed on the light exit surface 210 of the light guide plate 200, and the optical film 500 includes a lower diffusion sheet 510 disposed on the light exit surface 210 of the light guide plate 200, a prism sheet 520 disposed on a side of the lower diffusion sheet 510 away from the light guide plate 200, and an upper diffusion sheet 530 disposed on a side of the prism sheet 520 away from the lower diffusion sheet 510.
In this embodiment, an extension width d1 of the horizontal portion 422 of the back frame 400 horizontally extending from the vertical portion 421 to one side of the light guide plate 200 is 0.35mm, a distance d2 between the horizontal portion 422 and the optical film 500 is 0.2mm, and a distance d3 between an edge of the optical film 500 close to the horizontal portion 422 and a visible area of the display screen is 0.8mm, so that a frame width d4 of the backlight module can be 1.35mm, which is smaller than a frame width 1.6mm of the display panel at the present stage, and thus the frame of the display screen can be further narrowed, thereby realizing a full-screen.
In this embodiment, a gasket 600 is disposed on a surface of the light guide 300 flush with the light emitting surface 210 of the light guide plate 200. In a direction perpendicular to the light emitting surface 210 of the light guide plate 200, the thickness of the spacer 600 is the same as that of the optical film 500, so that the light guide member 300 and the optical film 500 have flat surfaces, and a light shielding tape is conveniently disposed on the flat surfaces to combine and fix the backlight module and the display panel.
In the backlight module of the present application, please refer to fig. 6, an orthographic projection of a connection position of the light-emitting side of the light guide 300 and the light guide plate 200 on the optical film 500 is located in the optical film 500, so that the optical film 500 protects the connection position of the light guide 300 and the light guide plate 200, and the connection position of the light guide 300 and the light guide plate 200 is not easily loosened.
In this embodiment, the side surface of the optical film 500 close to the light guide plate 200 is bonded and fixed to the surface of the light guide member 300, so that the optical film 500, the light guide member 300 and the light guide plate 200 are connected into a whole, and the stability of the whole structure is further improved.
The embodiment of the application further provides a display terminal, which comprises a terminal main body and the backlight module, wherein the backlight module and the terminal main body are combined into a whole. In the present embodiment, the display panel may be a TN-LCD, STN-LCD, HTN-LCD, FSTN-LCD, TFT-LCD, or the like.
The embodiment of the application provides a backlight module and a display terminal, wherein the backlight module is characterized in that the backlight source 100 is arranged on one side of the light guide plate 200, which is far away from the light-emitting surface 210, and the emergent light of the backlight source 100 is guided into the light guide plate 200 by the light guide member 300, so that the space occupied by the backlight source 100 in the frame position of the backlight module is reduced, and the effect of a narrow frame is realized. In addition, due to the existence of the light guide member 300, the distance between the backlight source 100 and the light incident surface of the light guide plate 200 is increased, so that the light emitted by the backlight source 100 is more sufficiently mixed, the brightness and color difference can be reduced, and the phenomenon of uneven brightness during display can be effectively improved.
The backlight module and the display terminal provided by the embodiment of the present application are described in detail above, and a specific example is applied to explain the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the method and the core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A backlight module is characterized by comprising a backlight source and a light guide component, wherein the light guide component comprises a light guide plate and a light guide piece, the backlight source is positioned on one side of the light guide plate, which is far away from a light emitting surface, the light guide piece is positioned on the light emitting side of the backlight source, the light guide plate is positioned on the light emitting side of the light guide piece, and emergent light of the backlight source enters the light guide plate through the light guide piece;
in the overlooking direction of the backlight module, the orthographic projection of the backlight source is at least partially overlapped with the orthographic projection of the light guide piece or/and the light guide plate.
2. The backlight module according to claim 1, wherein the light guide member comprises a light guide tube, a first end of the light guide tube is connected to the light exit side of the backlight source, and a second end of the light guide tube is connected to the light entrance side of the light guide plate;
the light guide tube is internally provided with a light guide channel, and emergent light of the backlight source enters the light guide plate through the light guide channel.
3. The backlight module according to claim 2, wherein a first reflective layer is disposed on an inner surface of the light guide tube adjacent to the light guide channel.
4. The backlight module according to claim 3, wherein the light exit side of the backlight source is embedded into the first end of the light guide tube, and the light entrance side of the light guide plate is embedded into the second end of the light guide tube;
the first end of the light guide cylinder is tightly attached to the light emitting side of the backlight source, and the second end of the light guide cylinder is tightly attached to the light incident side of the light guide plate.
5. The backlight module as claimed in claim 1, wherein the light guide member comprises a light guide block, a first end of the light guide block is connected to the light guide plate, a second end of the light guide block is bent to a side away from the light exit surface of the light guide plate, and a second end of the light guide block is connected to the light exit side of the backlight source;
and emergent rays of the backlight source penetrate through the light guide block and enter the light guide plate.
6. A backlight module according to claim 5, wherein the surface of the light guide block is provided with a second reflective layer on the side of the light guide block except the first end and the second end.
7. The backlight module according to any one of claims 1 to 6, further comprising a back frame, wherein the back frame is disposed on a side of the light guide plate away from the light emitting surface, a first notch is disposed on a side of the light guide facing the light guide plate, and the back frame extends into the first notch;
the light guide part is arranged in the first notch, and the light guide part is fixed with the back frame through the fixing part.
8. The backlight module according to claim 7, wherein the back frame comprises a main portion and a bending portion, the main portion is located on a side of the light guide plate away from the light exit surface, a first end of the bending portion is connected to the main portion, and a second end of the bending portion is bent toward the side of the light exit surface of the light guide plate;
the main body part is provided with a second notch, and the light guide part penetrates through the second notch.
9. The backlight module as claimed in claim 8, further comprising an optical film layer disposed on the light-emitting surface of the light guide plate, wherein the light guide member is provided with a cushion layer;
the thickness of the cushion layer is the same as that of the optical film layer in the direction perpendicular to the light-emitting surface of the light guide plate.
10. A display terminal comprising a terminal body and the backlight module according to any one of claims 1 to 9, wherein the backlight module and the terminal body are integrated.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114200715A (en) * | 2021-12-13 | 2022-03-18 | 武汉华星光电技术有限公司 | Backlight module and display panel |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06289390A (en) * | 1993-04-06 | 1994-10-18 | Sharp Corp | Liquid crystal display device |
| US20040032388A1 (en) * | 2002-08-16 | 2004-02-19 | Toppoly Optoelectronics Corp. | Backlight device of a LCD display |
| CN1716024A (en) * | 2002-08-30 | 2006-01-04 | 富士通显示技术株式会社 | Liquid display device and its producing method |
| KR20120138028A (en) * | 2011-06-14 | 2012-12-24 | 엘지이노텍 주식회사 | Backlight unit and display apparatus using the same |
| CN104570483A (en) * | 2015-01-06 | 2015-04-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN206771261U (en) * | 2017-05-26 | 2017-12-19 | 扬州吉新光电有限公司 | A kind of optically focused dodging device of LED light source |
| CN108614372A (en) * | 2018-06-06 | 2018-10-02 | 上海中航光电子有限公司 | Liquid crystal display device |
| CN108700263A (en) * | 2016-03-11 | 2018-10-23 | 夏普株式会社 | Lighting device and display device |
| CN110741314A (en) * | 2019-04-28 | 2020-01-31 | 深圳市汇顶科技股份有限公司 | backlight module and display device |
| CN111752021A (en) * | 2020-07-03 | 2020-10-09 | 武汉华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN112771308A (en) * | 2019-08-02 | 2021-05-07 | 京东方科技集团股份有限公司 | Light guide assembly, light source module and display device |
| CN113253518A (en) * | 2021-05-18 | 2021-08-13 | 武汉华星光电技术有限公司 | Backlight module and display device |
-
2021
- 2021-08-16 CN CN202110938083.9A patent/CN113687539B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06289390A (en) * | 1993-04-06 | 1994-10-18 | Sharp Corp | Liquid crystal display device |
| US20040032388A1 (en) * | 2002-08-16 | 2004-02-19 | Toppoly Optoelectronics Corp. | Backlight device of a LCD display |
| CN1716024A (en) * | 2002-08-30 | 2006-01-04 | 富士通显示技术株式会社 | Liquid display device and its producing method |
| KR20120138028A (en) * | 2011-06-14 | 2012-12-24 | 엘지이노텍 주식회사 | Backlight unit and display apparatus using the same |
| CN104570483A (en) * | 2015-01-06 | 2015-04-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN108700263A (en) * | 2016-03-11 | 2018-10-23 | 夏普株式会社 | Lighting device and display device |
| CN206771261U (en) * | 2017-05-26 | 2017-12-19 | 扬州吉新光电有限公司 | A kind of optically focused dodging device of LED light source |
| CN108614372A (en) * | 2018-06-06 | 2018-10-02 | 上海中航光电子有限公司 | Liquid crystal display device |
| CN110741314A (en) * | 2019-04-28 | 2020-01-31 | 深圳市汇顶科技股份有限公司 | backlight module and display device |
| CN112771308A (en) * | 2019-08-02 | 2021-05-07 | 京东方科技集团股份有限公司 | Light guide assembly, light source module and display device |
| CN111752021A (en) * | 2020-07-03 | 2020-10-09 | 武汉华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN113253518A (en) * | 2021-05-18 | 2021-08-13 | 武汉华星光电技术有限公司 | Backlight module and display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114200715A (en) * | 2021-12-13 | 2022-03-18 | 武汉华星光电技术有限公司 | Backlight module and display panel |
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| Publication number | Publication date |
|---|---|
| CN113687539B (en) | 2024-02-09 |
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