CN113641039B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN113641039B CN113641039B CN202110880806.4A CN202110880806A CN113641039B CN 113641039 B CN113641039 B CN 113641039B CN 202110880806 A CN202110880806 A CN 202110880806A CN 113641039 B CN113641039 B CN 113641039B
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- circuit board
- backlight module
- light
- bottom plate
- flexible circuit
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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
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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
-
- 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
- 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
- G02B6/009—Positioning aspects of the light source 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
- G02F1/133606—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
- G02F1/133602—Direct backlight
- G02F1/133612—Electrical details
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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)
- Liquid Crystal (AREA)
Abstract
The embodiment of the application discloses a backlight module and a display device; backlight unit is including gluing frame, light guide plate, light source, flexible circuit board, glues the frame and includes the bottom plate, the lateral wall of being connected with the bottom plate to and the roof of being connected with the lateral wall, and bottom plate, lateral wall and roof form one and hold the chamber, and the lateral wall is equipped with an opening with the bottom plate junction, and the light guide plate is located and holds the intracavity, and the light source is located hold the intracavity and be located the income light side of light guide plate, flexible circuit board set up on the bottom plate, and with light source electric connection, the one end of flexible circuit board is fixed in and holds the intracavity, and its other end stretches out the opening and buckles to the back of gluing the frame, and wherein, one side that the bottom plate was kept away from to flexible circuit board includes a shading portion, and when flexible circuit board buckled, shading portion covered the opening, played the effect that blocks the light leak part.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and a display device.
Background
As a mainstream display device at present, a liquid crystal display device has the characteristics of being light and thin and having low power consumption. Because of the limitation of the light emitting principle, the lcd must have a backlight module for providing light source. The FPC (Flexible Printed Circuit) electrically connected with the light source in the backlight module is welded with the external FPC, and conduction is achieved, so that the light source is controlled to emit light, and the liquid crystal display device can normally display.
The existing backlight module generally adopts a reverse assembly structure, the FPC of the backlight module of the reverse assembly structure is located at the bottom of the rubber frame, and a notch needs to be formed on the side surface of the rubber frame so that the FPC extends out and is connected to the FPC on the back surface of the display device in a bending manner. However, due to the structural design of the notch, light leakage exists at the notch, and light interference of the whole machine assembly is affected.
Disclosure of Invention
The embodiment of the invention provides a backlight module and a display device, and aims to solve the technical problem that light leaks at a gap due to the fact that a gap is formed in the side face of a rubber frame to enable an FPC to extend out in the conventional backlight module.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
an embodiment of the present invention provides a backlight module, including:
the rubber frame comprises a bottom plate, a side wall connected with the bottom plate and a top plate connected with the side wall, the bottom plate, the side wall and the top plate form an accommodating cavity, and an opening is formed at the joint of the side wall and the bottom plate;
the light guide plate is positioned in the accommodating cavity;
the light source is positioned in the accommodating cavity and positioned on the light incident side of the light guide plate; and
the flexible circuit board is arranged on the bottom plate and electrically connected with the light source, one end of the flexible circuit board is fixed in the accommodating cavity, and the other end of the flexible circuit board extends out of the opening and is bent to the back of the rubber frame; one side of the flexible circuit board, which is far away from the bottom plate, comprises a shading part, and when the flexible circuit board is bent, the shading part covers the opening.
In some embodiments of the present invention, the light shielding portion includes a fixed end and a free end, the fixed end is adhered to a side surface of the flexible circuit board far away from the bottom board, and when the flexible circuit board is bent, the free end is tilted and overlapped on the side wall.
In some embodiments of the present invention, an adhesive layer is attached to the first surface of the free end, and when the free end is tilted, the adhesive layer adheres to the sidewall.
In some embodiments of the present invention, the first width of the light shielding portion is equal to or greater than the second width of the opening.
In some embodiments of the present invention, the flexible circuit board includes a first circuit board and a second circuit board, which are stacked, a first end of the first circuit board is fixed in the accommodating cavity, a second end of the first circuit board extends out of the opening and is bent to the back of the rubber frame, the second circuit board includes a shading portion and a fixing portion connected to the shading portion, and the fixing portion is adhered to a side surface of the second circuit board away from the bottom plate.
In some embodiments of the present invention, a side of the first circuit board close to the second circuit board includes a groove, a side of the second circuit board close to the first circuit board includes a protrusion adapted to the groove, and the fixed end of the light shielding portion is located at a first edge of the protrusion close to the opening.
In some embodiments of the present invention, a surface of the second circuit board, which is close to the first circuit board, is provided with a light absorption film.
In some embodiments of the present invention, the light absorption film is one of black glue and black ink.
In some embodiments of the present invention, a side surface of the light absorption film close to the first circuit board has a concave-convex structure.
The embodiment of the invention provides a display device, which comprises a backlight module and a display panel arranged on the light emergent side of the backlight module, wherein the backlight module is the backlight module in any embodiment.
The invention has the beneficial effects that: the backlight module and the display device provided by the embodiment of the invention comprise a flexible circuit board flexibly arranged on a bottom plate of a rubber frame, one end of the flexible circuit board is fixed in a containing cavity formed by the rubber frame, the other end of the flexible circuit board extends out of an opening on the rubber frame and is bent to the back of the rubber frame, a shading part is designed on one side of the flexible circuit board far away from the bottom plate, and when the flexible circuit board is bent, the shading part covers the opening to play a role in shading light leakage at the opening.
Drawings
Fig. 1 is a schematic structural diagram of a flexible circuit board of a backlight module according to an embodiment of the present invention after bending;
fig. 2 is a schematic structural diagram of a flexible circuit board of a backlight module according to an embodiment of the present invention when the flexible circuit board is not bent;
fig. 3 is another schematic structural diagram of a flexible circuit board of a backlight module according to an embodiment of the present invention after being bent;
fig. 4 is a schematic structural diagram of a flexible circuit board provided in an embodiment of the present invention when the flexible circuit board is not bent at an opening;
fig. 5 is a schematic structural diagram of the flexible circuit board provided in the embodiment of the present invention after being bent at the opening;
FIG. 6 is a schematic side view of a side wall of a plastic frame according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first circuit board and a second circuit board according to an embodiment of the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The invention provides the embodiment to overcome the technical problem of light leakage at the gap due to the fact that the gap is formed in the side face of the rubber frame of the existing backlight module to enable the FPC to extend out.
Referring to fig. 1, fig. 1 is a schematic view illustrating a flexible circuit of a backlight module according to an embodiment of the present invention when the flexible circuit is bent. The backlight module 100 provided by the embodiment of the invention comprises a rubber frame 10, a light guide plate 40, a light source 30 and a flexible circuit board 20, wherein the rubber frame 10 comprises a bottom plate 11, a side wall 12 connected with the bottom plate and a top plate 13 connected with the side wall 12, the bottom plate 11, the side wall 12 and the top plate 13 form an accommodating cavity 101, the light guide plate 40 and the light source 30 are located in the accommodating cavity 101, the light source 30 is located on a light incident side of the light guide plate 40, one side of a light emergent side is used for arranging a liquid crystal display panel, the light incident side and the light emergent side are two adjacent side surfaces of the light guide plate 40, namely the light source 30 is a side-in light source, and the backlight module 100 provides a backlight source for the liquid crystal display panel.
The flexible circuit board 20 is disposed on the bottom plate 11, and the flexible circuit board 20 is electrically connected to the light source 30. An opening 102 is arranged at the joint of the side wall 12 and the bottom plate 11, one end of the flexible circuit board 20 is fixed in the accommodating cavity 101, and the other end of the flexible circuit board extends out of the opening 102 and is bent to the back of the rubber frame 10, so that the flexible circuit board 20 can be electrically connected with an external flexible circuit board at the back of the rubber frame 10, and the light source 30 is controlled to emit light.
The side wall 12 of the rubber frame 10 is provided with the opening 102 so that the flexible circuit board 20 can extend out, but the design of leaving the opening 102 can cause light leakage at the opening 102 and affect light interference of subsequent whole machine assembly. The embodiment of the invention improves the structure of the flexible circuit board 20, and adds the light shielding part 221 on the flexible circuit board 20, so that when the flexible circuit board 20 is bent, the light shielding part 221 can cover the opening 102 to shield the light leakage at the opening 102.
Specifically, one side of the flexible circuit board 20, which is away from the bottom plate 11, includes a light shielding portion 221, and when the flexible circuit board 20 is bent, the light shielding portion 221 can tilt to cover the opening 102 without bending along with the body of the flexible circuit board 20.
Referring to fig. 1, the light shielding portion 221 includes a free end 2201 and a fixed end 2203, the fixed end 2203 is adhered to a side surface of the flexible circuit board 20 away from the bottom plate 11, and when the flexible circuit board 20 is bent, the free end 2201 is tilted and overlapped on the side wall 12.
Referring to fig. 2, fig. 2 is a schematic structural diagram of the flexible circuit board when the flexible circuit board is not bent. When the flexible circuit board 20 is not bent, an orthographic projection of the free end 2201 on the bottom plate 11 is located in an orthographic projection of the opening 102 on the bottom plate 11, and when the flexible circuit board 20 is bent, the free end 2201 is transversely tilted and lapped on the side wall 12. The orthographic projection of the free end 2201 is located in the orthographic projection of the opening 102, that is, the free end 2201 is allowed to extend into the opening 102, so as to ensure that the length of the light shielding portion 221 is long enough to be overlapped on the sidewall 12 when the flexible circuit board 20 is tilted, but the length of the light shielding portion 221 cannot be too long, and the portion of the light shielding portion 221 located in the sidewall 12 is too long to be beneficial to tilting of the light shielding portion 221, so that the free end 2201 is preferably ensured in the opening 102.
Further, an adhesive layer (not shown) is attached to the first surface of the free end 2201, and when the light shielding portion 221 is tilted, the adhesive layer is attached to the sidewall 12. Preferably, the adhesive layer is a double-sided adhesive tape.
Specifically, the first surface of the free end 2201 is a portion where the light shielding portion 221 contacts the sidewall 12 when the light shielding portion 221 is tilted. When the equipment, tear off the protection film of double faced adhesive tape one side, with it attached on the first surface of free end 2201, keep the protection film of double faced adhesive tape opposite side, will flexible circuit board 20's one end is fixed in holding chamber 101, and flexible circuit board 20's the other end stretches out opening 102, will flexible circuit board 20 buckles to the back of gluing frame 10, and shading portion 221 takes place the perk this moment, tears off the protection film of double faced adhesive tape opposite side to be in with free end 2201 adhesion on lateral wall 12, further improve the effect of shading.
In an embodiment of the present invention, please refer to fig. 6, fig. 6 is a side view schematically illustrating a sidewall. The first width W1 of the light shielding portion 221 needs to be equal to or greater than the second width W2 of the opening 102 to ensure that the light shielding portion 221 has a sufficient width to shield the light leakage at the opening 102. The first width W1 is a width of an orthogonal projection of the light shielding portion 221 on a plane where the sidewall 12 is located when the light shielding portion 221 is tilted, and a direction of the first width W1 is the same as a direction of the second width W2. The width of the first width W1 does not need to be much larger than the second width W2, and it only needs to ensure that the light shielding portion 221 can shield the light leakage at the opening 102 and can be attached to the sidewall 12 near the opening 102, and the too wide width is not favorable for the assembly of the whole machine.
The flexible circuit board 20 has the characteristics of high wiring density, light weight, thin thickness and good bending property, even if the first width W1 of the shading part 221 of the flexible circuit board 20 is slightly larger than the second width W2 of the opening 102, the shading part 221 can be slightly bent to reduce the first width W1 of the shading part 221 during assembly, so that the flexible circuit board 20 can pass through the opening 102, the assembly of the flexible circuit board 20 cannot be interfered, and after the flexible circuit board 20 passes through the opening 102, the shading part 221 is restored to the flatness, so that the shading part 221 can cover the opening 102 during subsequent bending.
Referring to fig. 1, in some embodiments of the present invention, the flexible circuit board 20 may be designed in a layered manner at a position close to the plastic frame where the flexible circuit board is required to be bent, so as to separate two non-adhesive film layers, one of which is used as the light shielding portion 221, and the other of which extends into the plastic frame 10 and is fixed on the bottom plate 11.
Referring to fig. 2 to 5, fig. 4 is a schematic structural view of the flexible circuit board without bending at the opening, and fig. 5 is a schematic structural view of the flexible circuit board after bending at the opening. In other embodiments of the present invention, the flexible circuit board 20 may include a first circuit board 21 and a second circuit board 22 stacked together, a first end 211 of the first circuit board 21 is fixed in the accommodating cavity 101, a second end 212 of the first circuit board 21 extends out of the opening 102 and is bent to the back of the rubber frame 10, the second circuit board 22 includes a light shielding portion 221 and a fixing portion 222 connected to the light shielding portion 221, and the fixing portion 222 is adhered to a side surface of the second circuit board 22 away from the bottom plate 11.
The portion of the first circuit board 21 located in the accommodating cavity 101 is fixed to the bottom plate 11 through the first double-sided adhesive layer 50, the fixing portion 222 of the second circuit board 22 is fixed to the second circuit board 22 through a press fit, the fixing portion 222 is located outside the accommodating cavity 101, and the fixing portion 222 is farther away from the opening 102 than the light shielding portion 221.
Referring to fig. 7, a side of the first circuit board 21 close to the second circuit board 22 includes a groove 2101, a side of the second circuit board 22 close to the first circuit board 21 includes a protrusion 2202 adapted to the groove 2101, and the fixed end 2203 of the light shielding portion 221 is located at the protrusion 2202 close to the first edge 2204 of the opening 102. By designing the concave-convex structure, the boundary line between the fixing portion 222 and the light shielding portion 221 is designed to be the edge of the protrusion 2202, so that when the flexible circuit board 20 is bent as a whole, the light shielding portion 221 is not bent but tilted, and the purpose of shielding light leakage at the opening 102 is achieved.
Further, the groove 2101 and the protrusion 2202 are both located outside the receiving groove 101, and when the first circuit board 21 and the second circuit board 22 are prepared, the groove 2101 and the protrusion 2202 are pressed.
Referring to fig. 4 and 5, a light absorption film (not shown) is disposed on a side surface of the second circuit board 22 close to the first circuit board 21, and light leakage is reduced by using a light absorption effect of the light absorption film.
In the embodiment of the invention, the light absorption film can be processed by a concave-convex structure, so that the roughness of the surface of the light absorption film is increased, and the light absorption effect of the light absorption film is enhanced. Specifically, the surface of one side, close to the first circuit board, of the light absorption film is provided with a concave-convex structure.
In the embodiment of the present invention, the light absorption film may be one of black glue and black ink, or another material capable of absorbing light.
In order to avoid interference with the assembly of other components due to an excessively large bending radius of the flexible circuit board 20, it is preferable that the bending outer radius of the whole flexible circuit board 20 is generally not greater than 0.8 mm. The bending radius value can be measured by sampling measurement or an infrared distance measurement method.
Referring to fig. 1, a surface of the light guide plate 40 opposite to the light exit side may be connected to the flexible circuit board 20 through a second double-sided adhesive 60, a reflective sheet 70 is attached to a side of the light guide plate 40 opposite to the light exit side, and the reflective sheet 70 is fixed to the bottom plate 11 through a third double-sided adhesive 80. The light-emitting side of the light guide plate 40 is provided with an optical film group 110, and the optical film group 110 includes one or more combinations of a diffusion sheet 113, a brightness enhancement sheet 112, a DBEF111, and a composite film.
The outer side surface of the top plate 13 is attached with a square glue 90, and the square glue 90 is used for assembling the backlight module 100 with other external components.
The embodiment of the present invention further provides a display device, which includes the backlight module 100 in the above embodiment and a display panel disposed on the light exit side of the backlight module 100, wherein the display panel may be a liquid crystal display panel.
The backlight module and the display device provided by the embodiment of the invention comprise a flexible circuit board flexibly arranged on a rubber frame bottom plate, one end of the flexible circuit board is fixed in a containing cavity formed by the rubber frame, the other end of the flexible circuit board extends out of an opening in the rubber frame and is bent to the back of the rubber frame, a shading part is designed on one side of the flexible circuit board far away from the bottom plate, and when the flexible circuit board is bent, the shading part covers the opening to play a role in shading light leakage at the opening.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The backlight module and the display device provided by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A backlight module, comprising:
the rubber frame comprises a bottom plate, a side wall connected with the bottom plate and a top plate connected with the side wall, the bottom plate, the side wall and the top plate form an accommodating cavity, and an opening is formed at the joint of the side wall and the bottom plate;
the light guide plate is positioned in the accommodating cavity;
the light source is positioned in the accommodating cavity and positioned on the light incident side of the light guide plate; and
the flexible circuit board is arranged on the bottom plate and is electrically connected with the light source; wherein,
the flexible circuit board includes range upon range of first circuit board and second circuit board, the first end of first circuit board is fixed in hold the intracavity, the second end of first circuit board stretches out the opening is buckled extremely the back of gluey frame, the second circuit board include the shading portion and with a fixed part that the shading portion is connected, the fixed part adhesion in first circuit board is kept away from a side surface of bottom plate when the flexible circuit board is buckled, the shading portion covers the opening.
2. The backlight module as claimed in claim 1, wherein the light shielding portion comprises a fixed end and a free end, and the free end is tilted and overlapped on the sidewall when the flexible printed circuit board is bent.
3. The backlight module as claimed in claim 2, wherein an adhesive layer is attached to the first surface of the free end, and when the free end is tilted, the adhesive layer adheres to the sidewall.
4. A backlight module according to claim 1, wherein the first width of the light shielding portion is equal to or greater than the second width of the opening.
5. The backlight module according to claim 2, wherein a side of the first circuit board adjacent to the second circuit board comprises a groove, a side of the second circuit board adjacent to the first circuit board comprises a protrusion adapted to the groove, and the fixed end of the light-shielding portion is located at a first edge of the protrusion adjacent to the opening.
6. The backlight module as claimed in claim 5, wherein a light absorbing film is disposed on a surface of the second circuit board adjacent to the first circuit board.
7. The backlight module as claimed in claim 6, wherein the light absorbing film is one of black glue and black ink.
8. The backlight module as claimed in claim 7, wherein a surface of the light absorbing film adjacent to the first circuit board has a concave-convex structure.
9. A display device, comprising a backlight module and a display panel disposed on a light-emitting side of the backlight module, wherein the backlight module is as claimed in any one of claims 1 to 8.
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| CN202110880806.4A CN113641039B (en) | 2021-08-02 | 2021-08-02 | Backlight module and display device |
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| CN202110880806.4A CN113641039B (en) | 2021-08-02 | 2021-08-02 | Backlight module and display device |
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| CN113641039B true CN113641039B (en) | 2022-11-01 |
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| CN116009302B (en) * | 2023-01-18 | 2024-01-26 | 惠科股份有限公司 | Backlight module, assembling method and assembling system thereof |
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| JP2005003882A (en) * | 2003-06-11 | 2005-01-06 | Kawaguchiko Seimitsu Co Ltd | Liquid crystal display device with backlight attached thereto |
| CN110908187A (en) * | 2019-11-26 | 2020-03-24 | 厦门天马微电子有限公司 | Display device |
| CN211956069U (en) * | 2020-03-09 | 2020-11-17 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060125981A1 (en) * | 2004-11-26 | 2006-06-15 | Tatsumi Okuda | Display and mobile device |
| KR20080012613A (en) * | 2006-08-04 | 2008-02-12 | 삼성전자주식회사 | Liquid crystal display apparatus |
| CN102606952B (en) * | 2012-03-06 | 2014-10-15 | 深圳市华星光电技术有限公司 | Reflective incidence backlight module and liquid crystal display device |
| CN110058455B (en) * | 2019-04-29 | 2021-09-24 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN112578603B (en) * | 2019-09-29 | 2023-09-01 | 群创光电股份有限公司 | electronic device |
| CN110764312B (en) * | 2019-11-13 | 2022-02-22 | 厦门天马微电子有限公司 | Backlight module and display device |
| CN110806658B (en) * | 2019-11-19 | 2022-03-08 | 厦门天马微电子有限公司 | Backlight module and display device |
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| JP2005003882A (en) * | 2003-06-11 | 2005-01-06 | Kawaguchiko Seimitsu Co Ltd | Liquid crystal display device with backlight attached thereto |
| CN110908187A (en) * | 2019-11-26 | 2020-03-24 | 厦门天马微电子有限公司 | Display device |
| CN211956069U (en) * | 2020-03-09 | 2020-11-17 | 昆山龙腾光电股份有限公司 | Backlight module and display device |
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