CN113835266A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN113835266A CN113835266A CN202111145927.0A CN202111145927A CN113835266A CN 113835266 A CN113835266 A CN 113835266A CN 202111145927 A CN202111145927 A CN 202111145927A CN 113835266 A CN113835266 A CN 113835266A
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- rubber frame
- frame
- color conversion
- conversion film
- backlight module
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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
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
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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
- G02F1/133603—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
- G02F1/133608—Direct backlight including particular frames or supporting means
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module and a display device, wherein the backlight module comprises: the lamp panel comprises a plurality of light-emitting elements arranged in an array; the first rubber frame is arranged around the lamp panel; the iron frame comprises a back plate and a side plate; the back plate is positioned on one side of the lamp panel, which is far away from the light-emitting surface; the side plate surrounds the first rubber frame, and the first rubber frame is fixed on one side of the side plate close to the lamp panel; the color conversion film is positioned on the light emergent surface side of the lamp panel and extends to the first surface of the first rubber frame; the part of the color conversion film, which is in contact with the first surface, is a first extension part; the first surface is the surface of one side of the first rubber frame, which is far away from the back plate; the first optical assembly is positioned on one side, away from the lamp panel, of the color conversion film; the second rubber frame covers the side plate, the first rubber frame and the first extending part and at least surrounds the first optical assembly. The embodiment of the invention can solve the problem of displaying the blue edge and can achieve the beneficial effect of improving the display quality.
Description
Technical Field
The embodiment of the invention relates to a display technology, in particular to a backlight module and a display device.
Background
A liquid crystal display is a display that displays images on a liquid crystal display panel by means of light emitted from a backlight module. The backlight module uses a light-emitting diode (LED) as a light source, especially a direct-type backlight module, which generally uses a blue LED chip as a light source and mixes blue light emitted from the blue LED chip into white light with a color conversion module, so that the lcd has a higher color gamut.
However, with the requirement of the narrow frame of the liquid crystal display, the size of the light-shielding tape disposed in the liquid crystal display is reduced, so that the light-shielding tape cannot absorb the blue light leaking from the edge, and the blue phenomenon occurs around the liquid crystal display, which causes the problem of displaying the blue edge, and further affects the display effect of the liquid crystal display.
Disclosure of Invention
The invention provides a backlight module and a display device, which are used for solving the problem of blue edge display and improving the display effect on the premise of not influencing the size of a frame of the display device.
In a first aspect, an embodiment of the present invention provides a backlight module, including:
the lamp panel comprises a plurality of light-emitting elements arranged in an array;
the first rubber frame is arranged around the lamp panel;
the iron frame comprises a back plate and a side plate; the back plate is positioned on one side of the lamp panel, which is far away from the light-emitting surface; the side plate surrounds the first rubber frame, and the first rubber frame is fixed on one side, close to the lamp panel, of the side plate;
the color conversion film is positioned on the light emergent surface side of the lamp panel and extends to the first surface of the first rubber frame; the part of the color conversion film, which is in contact with the first surface, is a first extension part; the first surface is the surface of one side of the first rubber frame, which is deviated from the back plate;
the first optical assembly is positioned on one side, away from the lamp panel, of the color conversion film;
the second rubber frame covers the side plate, the first rubber frame and the first extending part and at least surrounds the first optical assembly.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes: a display panel and the backlight module;
the display panel is located on one side, away from the color conversion film, of the first optical assembly and covers at least part of the second rubber frame.
According to the invention, the color conversion film is arranged, so that light rays emitted by the light emitting elements in the lamp panel are converted into light with a specific color, for example, blue light emitted by the light emitting elements in the lamp panel is mixed into white light, so that the backlight emitted by the backlight module has a higher color gamut; meanwhile, the color conversion film is extended to the first surface of the first rubber frame arranged around the lamp panel, so that the color conversion film can cover all light emitting areas of the lamp panel, light emitted by the light emitting elements in the lamp panel can be converted into light with a specific color through the color conversion film, the problem that a display panel displays a blue edge due to the fact that the light at the edge of the lamp panel is directly emitted without being converted by the color conversion film is solved, and the display effect of the display device adopting the backlight module can be improved; in addition, the first rubber frame and the second rubber frame are arranged in a layered mode, the first rubber frame is used for bearing and supporting the color conversion film, the second rubber frame covers the first rubber frame and the color conversion film on the first surface after the color conversion film is assembled, other structures are not needed to be additionally arranged for bearing and supporting the first extension portion, the size of a frame of the backlight module cannot be additionally increased due to the increase of the color conversion film, the narrow frame of the display device is facilitated, an accommodating groove is not needed to be formed in the rubber frame for accommodating the first extension portion, the forming process of the rubber frame is simplified, the assembling mode of the color conversion film, the first rubber frame and the second rubber frame is simplified, and the process of the backlight module can be simplified.
Drawings
FIG. 1 is a schematic diagram of a display device according to the prior art;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
FIG. 3 is an enlarged view of region A of FIG. 2;
FIG. 4 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
FIG. 8 is an enlarged view of the area B in FIG. 7;
FIG. 9 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a backlight module according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of another backlight module according to an embodiment of the invention;
fig. 12 is a schematic diagram of a film structure of a display device according to an embodiment of the invention;
fig. 13 is a schematic top view of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a display device in the prior art, and as shown in fig. 1, a display device 003 in the prior art includes a backlight module and a display panel 002. The backlight module is a direct type backlight module and comprises a lamp panel 01, a rubber frame 02, an iron frame 03, a color conversion film 04 and a light homogenizing assembly 05. The iron frame 03 and the rubber frame 02 form an accommodating cavity for accommodating the lamp panel 01, the color conversion film 04 and the dodging assembly 05; the light emitted by the lamp panel 01 is emitted to the display panel 002 after being homogenized by the first part of the light homogenizing assembly 05, the color conversion module 04 and the second part of the light homogenizing assembly 05 in sequence, and the display panel 002 can display corresponding images after penetrating through the display panel 002. Typically, the lamp panel 01 includes a plurality of LEDs 011, the LEDs 011 emitting light, typically monochromatic, e.g., the LEDs 011 emitting blue light that can be mixed into white light after conversion via the color conversion film 04, providing a white light source for the display panel 002.
In addition, because there is the clearance 010 between gluey frame 02 and lamp plate 01, color conversion film 04 and even optical assembly 05, and every LED 011 has certain light-emitting angle in the lamp plate 01, make the luminescent region of every LED 011 not only cover the region that this LED 011 is located, still can cover the region around this LED 011, when there is the clearance 010 between gluey frame 02 and lamp plate 01, color conversion film 04 and even optical assembly 05, the monochromatic light that is close to the LED 011 of edge in the lamp plate 01 and sends can be leaked by clearance 010, consequently still be provided with shading sticky tape 06 in gluey frame 02 one side near display panel 002, this shading sticky tape 06 extends to the top of even optical assembly 05, in order to play certain shading effect.
However, with the requirement of the narrow frame of the display device, the size of the disposed light-shielding tape 06 is reduced, so that the light-shielding tape can only shield a part of light leaking from the gap 010, and other light leaks from the edge of the light-shielding tape to reach the edge of the display panel 002, when the display panel 002 displays a picture, the edge of the display panel 002 displays monochromatic light which is not converted by the color conversion film 04, that is, blue light, so that the picture displayed by the display panel 002 displays a blue edge, and the display effect of the display device is further affected.
To solve the above technical problem, an embodiment of the present invention provides a backlight module, including: the lamp panel comprises a plurality of light-emitting elements arranged in an array; the first rubber frame is arranged around the lamp panel; the iron frame comprises a back plate and a side plate; the back plate is positioned on one side of the lamp panel, which is far away from the light-emitting surface; the side plate surrounds the first rubber frame, and the first rubber frame is fixed on one side of the side plate close to the lamp panel; the color conversion film is positioned on the light emergent surface side of the lamp panel and extends to the first surface of the first rubber frame; the part of the color conversion film, which is in contact with the first surface, is a first extension part; the first surface is the surface of one side of the first rubber frame, which is far away from the back plate; the first optical assembly is positioned on one side, away from the lamp panel, of the color conversion film; the second rubber frame covers the side plate, the first rubber frame and the first extending part and at least surrounds the first optical assembly.
By adopting the technical scheme, on the first hand, the color conversion film is extended to the first surface of the first rubber frame arranged around the lamp panel, so that the color conversion film can cover all light emitting areas of the lamp panel, and light emitted by the light emitting element in the lamp panel can be converted into light with a specific color through the color conversion film, so that the problem that a display panel displays a blue edge due to the fact that the light at the edge of the lamp panel is directly emitted without being converted by the color conversion film is solved, and the display effect of the display device adopting the backlight module can be improved; in a second aspect, the first rubber frame and the second rubber frame are arranged in layers, the first rubber frame is used for bearing and supporting the color conversion film, after the color conversion film is assembled, the second rubber frame covers the first rubber frame and the color conversion film on the first surface, other structures are not needed to be additionally arranged for bearing and supporting the first extension portion, the size of a frame of the backlight module cannot be additionally increased due to the increase of the color conversion film, the narrow frame of the display device is facilitated, an accommodating groove is not needed to be formed in the rubber frame for accommodating the first extension portion, the forming process of the rubber frame is simplified, the assembling mode of the color conversion film, the first rubber frame and the second rubber frame is simplified, and the process of the backlight module can be simplified.
The above is the core idea of the present invention, and based on the embodiments of the present invention, a person skilled in the art can obtain all other embodiments without creative efforts, which belong to the protection scope of the present invention. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention, and as shown in fig. 2, the backlight module 100 includes: a lamp panel 10 including a plurality of light emitting elements 11 arranged in an array; the first rubber frame 21 is arranged around the lamp panel 10; the iron frame 30 comprises a back plate 31 and a side plate 32, wherein the back plate 31 is positioned on one side of the lamp panel 10, which is far away from the light emitting surface 101; the side plate 32 surrounds the first rubber frame 21, and the first rubber frame 21 is fixed on one side of the side plate 32 close to the lamp panel 10; the color conversion film 40 is positioned on the light emitting surface 101 side of the lamp panel 10 and extends to the first surface 201 of the first rubber frame 21; the portion of the color conversion film 40 in contact with the first surface 201 is the first extension 41; the first surface 201 is a side surface of the first rubber frame 21 departing from the back plate 31; a first optical assembly 51 located on a side of the color conversion film 40 away from the lamp panel 10; the second plastic frame 22 covers the side plate 32, the first plastic frame 21 and the first extending portion 41, and surrounds at least the first optical assembly 51.
The backlight module 100 utilizes the light emitting element 11 of the lamp panel 10 to provide light, the light is converted into light of a specific color by the color conversion module 40, and the light of the specific color is homogenized and brightened by the first optical assembly 51, so that the backlight module 100 can emit backlight with high color gamut and high uniformity. The structure formed by the iron frame 30, the first rubber frame 21 and the second rubber frame 22 can bear and contain the lamp panel 10, the color conversion module 40, the first optical assembly 51 and other assembly structures, and serve as a protective barrier of each assembly structure, so that each assembly structure is protected from external impact. The plurality of light emitting elements 11 arrayed in the lamp panel 10 may be LED chips, and the LED chips may be min-LED chips or micro-LED chips, etc.; the light emitting color of each light emitting element 11 is usually a single color, for example, the light emitting color of the light emitting element 11 may be blue, that is, the light emitting element 11 may be a blue LED chip. At this time, the color conversion film 40 can mix the blue light emitted from the light emitting elements 11 into white light to provide a light source for the display panel.
The first extension portion 41 of the color conversion film 40 contacts the first surface 201 of the first rubber frame 21, that is, the color conversion film 40 covers the lamp panel 10, and also covers the gap 1001 between the lamp panel 10 and the first rubber frame 21 and a part of the first rubber frame 21, so that the color conversion film 40 can convert light in the area where the lamp panel 10 is located into light of a specific color, and can also convert light around the lamp panel 10 into light of a specific color, so as to prevent the light around the lamp panel 10 from being directly emitted without being converted by the color conversion film 40, and the light emitted at the edge position of the backlight module 100 is light of a single color emitted by the light emitting element 11, that is, blue light, so that the display panel has a problem of displaying blue edges, and thus the display effect of the display device adopting the backlight module 100 can be improved.
Meanwhile, the first rubber frame 21 and the second rubber frame 22 cooperate to form a rubber frame structure of the backlight module 100, so that the first surface 201 of the first rubber frame 21 can bear and support the first extension portion 41 of the color conversion film 40, and after the lamp panel 10 and the color conversion film 40 are sequentially arranged in the accommodating cavity formed by the iron frame 30 and the first rubber frame 21, the second rubber frame 22 is arranged, so that the second rubber frame 22 located around the first optical assembly 51 covers the first side plate 32, the first rubber frame 21 and the first extension portion 41, and at this time, the rubber frame structure formed by the first rubber frame 21 and the second rubber frame 22 can provide an accommodating space for the first extension portion 41 on the basis of realizing the original functions of the rubber frame structure (protecting other assembly structures in the backlight module 100), on one hand, the first rubber frame plays a role in bearing and supporting the first extension portion 41, and on the other hand, the combination of the first rubber frame and the second rubber frame can better fix the color conversion film, therefore, the size of the plastic frame structure does not need to be widened in the first direction X for bearing and supporting the first extension portion 41, the frame size of the backlight module 100 does not need to be additionally increased due to the increase of the color conversion film 40, a narrow frame of the display device is facilitated, or an accommodating groove needs not to be formed in the plastic frame for accommodating the first extension portion 41, the molding process of the plastic frame is simplified, the assembling mode of the color conversion film 40 and the first plastic frame 21 and the second plastic frame 22 is simplified, and the process of the backlight module is facilitated to be simplified.
It is understood that quantum dots may be disposed in the color conversion film 40, and light emitted from the light emitting element 11 may be mixed into white light by exciting the quantum dots in the color conversion film 40 by light emitted from the light emitting element 11. When the light emitting element 11 emits blue light, the color conversion film 40 may include red light quantum dots and green light quantum dots, in which the red light quantum dots are excited by the blue light emitted from the light emitting element 11 to generate red light, the green light quantum dots are excited by the blue light emitted from the light emitting element 11 to generate green light, and the red light and the green light are mixed with the blue light emitted from the light emitting element 11 to form white light. Alternatively, when the light emitting element 11 emits light of another color, the types of quantum dots in the color conversion film 40 may also change accordingly, and on the premise that the light emitted by the light emitting element 11 can be mixed into white light after passing through the color conversion film 40, the embodiment of the present invention does not specifically limit the light emitting color of the light emitting element 11 and the types of quantum dots disposed in the color conversion film 40.
In addition, the first optical assembly 51 may include a plurality of optical structures, such as a light-splitting film 511, an antireflection film 512, a diffusion sheet 513, and the like, which are sequentially disposed from bottom to top, wherein the number of the light-splitting films 511, the number of the antireflection films 512, and the number of the diffusion sheets 513 may be set according to actual needs; for example, the light-splitting film 511 may be three layers, the antireflection film 512 may include lower and upper prisms, and the diffusion sheet 513 may be one layer.
It should be noted that, in fig. 2, the first optical assembly 51 is only an exemplary structure according to the embodiment of the present invention, and on the premise that the first optical assembly 51 can perform the functions of light uniformization, brightness enhancement, and the like, the embodiment of the present invention does not specifically limit the structural composition of the first optical assembly 51.
Optionally, with continuing reference to fig. 2, the backlight module 100 further includes: and a second optical assembly 52 located between the lamp panel 10 and the color conversion film 40.
The second optical assembly 52 can homogenize the light emitted by the light emitting element 11 in the lamp panel 10 and then transmit the homogenized light to the color conversion film 40, so that the light with a specific color can also have high uniformity when the color conversion film 40 converts the light with high uniformity into the light with the specific color.
For example, the second optical assembly 52 may include a spectroscopic film 521 and a transflective layer (BLT) 522; the light splitting film 521 can disperse the light beam emitted by the single light emitting element 11 in the lamp panel 10 into a plurality of light beams, so that the light beams have high uniformity; the transparent and reflective layer (BLT)522 can only transmit the light with the same color of the light emitting element 11, and reflect other colors of light, for example, when the light emitting element 11 has a blue color, the transparent and reflective layer (BLT)522 can transmit blue light and reflect red light and green light, so as to ensure that the red light and the green light converted by the color conversion film 40 are both emitted from the light emitting surface of the backlight module 100, thereby improving the utilization rate of light.
Alternatively, fig. 3 is an enlarged schematic structural diagram of a region a in fig. 2, and referring to fig. 2 and 3 in combination, in a direction Z perpendicular to the plane of the color conversion film 40, a distance Δ H2 between a side surface 502 of the second optical assembly 52 facing away from the lamp panel 10 and the first surface 201 is; wherein, | delta H2|, is less than or equal to 0.2 μm.
Thus, the second optical assembly 52 can support the color conversion film 40 covering the lamp panel 10 to a certain extent, and at the same time, the distance Δ H2 between the surface 502 of the second optical assembly 52 and the first surface 201 is limited within the range of less than or equal to 0.2 μm, so that the color conversion film 40 can be prevented from being deformed and damaged due to a large height difference between the surface 502 of the second optical assembly 52 and the first surface 201, that is, the color conversion film 40 can be kept in a relatively flat state, thereby prolonging the service life of the color conversion film 40 and improving the performance of the color conversion film 40.
Optionally, when the light emitting color of the light emitting element is blue, the first rubber frame and/or the second rubber frame is a yellow rubber frame.
For example, fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, and as shown in fig. 4, the first plastic frame 21 is a yellow plastic frame, and the second plastic frame 22 is a white plastic frame. The blue light and the yellow light are mixed in a certain proportion to generate white light, namely, the complementary color of the blue light is yellow optically; therefore, by setting the first rubber frame 21 as a yellow rubber frame, the first rubber frame 21 can compensate the blue light emitted by the light emitting element 11 in the lamp panel 10, so that the color of the light transmitted through the first rubber frame 21 tends to be white.
Alternatively, as shown in fig. 5, the second rubber frame 22 is a yellow rubber frame, and the first rubber frame 21 remains a white rubber frame; at this time, the second plastic frame 22 can compensate the blue light emitted by the light emitting elements 11 in the lamp panel 10 to some extent, so that the color of the light passing through the second plastic frame 22 tends to white.
Alternatively, as shown in fig. 6, both the first rubber frame 21 and the second rubber frame 22 may be yellow rubber frames. The first rubber frame 21 and the second rubber frame 22 can compensate the blue light emitted by the light emitting element 11 in the lamp panel 10 to some extent, so that the color of the light transmitted through the first rubber frame 21 and the second rubber frame 22 tends to white.
When the light emitting color of the light emitting element 11 is blue, the first rubber frame 21 and/or the second rubber frame 22 is a yellow rubber frame. However, the light emitting color of the light emitting element 11 is not limited to blue in the embodiment of the present invention, and in this case, the color of the first rubber frame 21 and/or the second rubber frame 22 is complementary to the light emitting color of the light emitting element 11; for example, when the light emitting color of the light emitting element 11 is red, the first and/or second rubber frames 21 and 22 may be cyan rubber frames or the like. In the embodiment of the present invention, the light emitting color of the light emitting element 11 and the color of the first rubber frame 21 and/or the second rubber frame 22 are not particularly limited.
For convenience of description, in the embodiments of the present invention, the first rubber frame 21 and the second rubber frame 22 are both yellow rubber frames, and the technical solutions of the embodiments of the present invention are exemplarily described without specific description.
Optionally, fig. 7 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, and as shown in fig. 7, the backlight module 100 further includes a fixing tape 60, where the fixing tape 60 is disposed between the first rubber frame 21 and the second rubber frame 22 and located on one side of the color conversion film 40 close to the side plate 32.
The fixing tape 60 can be used to fix the first rubber frame 21 and the second rubber frame 22, so as to prevent the first rubber frame 21 and the second rubber frame 22 which are arranged in layers from moving relatively, which affects the stability of the backlight module 100, and facilitate the assembly of other component structures; meanwhile, the first rubber frame 21 and the second rubber frame 22 are fixed together through the fixing adhesive tape 60, so that the rubber frame structure formed by the first rubber frame 21 and the second rubber frame 22 can better protect the assembly structure contained in the containing cavity formed by the iron frame 30, the first rubber frame 21 and the second rubber frame 22.
It is understood that the securing tape 60 may be a conventional single-sided tape or double-sided tape; when the adhesive tape is a single-sided adhesive, the surface of the other structure in contact with the non-adhesive surface of the fixing adhesive tape 60 may have a certain viscosity to perform an adhesive function; when the fixing tape 60 is a double-sided tape, the two bonding surfaces of the fixing tape 60 can be directly attached to other structures. In addition, the fixing tape 60 may also be a tape with a certain reflective and light-shielding function, and the reflective surface of the fixing tape is a surface close to one side of the first rubber frame 21, so as to reflect the light transmitted to the fixing tape 60, thereby achieving the purpose of improving the utilization rate of the light.
Optionally, with continued reference to fig. 7, the first surface 201 includes a first region 211 contacting the first extension 41 and a second region 212 that does not overlap with a perpendicular projection of the first extension 41 on the first surface 201; the second glue frame 22 comprises a second surface 202 opposite to the first surface 201; one side of the fixing tape 60 is attached to the second region of the first surface 201, and the other side of the fixing tape 60 is attached to the second surface 202.
Thus, the fixing tape 60 directly attaches the first adhesive frame 21 and the second adhesive frame 22 together, and the attaching position of the fixing tape 60 and the first extension portion 41 are not overlapped with each other, compared with the case that the fixing tape 60 covers the first extension portion, the thickness of the backlight module 100 in the direction Z perpendicular to the plane where the color conversion film 40 is located can be reduced, thereby facilitating the lightening and thinning of the backlight module 100, and further facilitating the lightening and thinning of the display device adopting the backlight module 100.
Alternatively, fig. 8 is an enlarged schematic structural view of a region B in fig. 7, and referring to fig. 7 and 8 in combination, in a direction Z perpendicular to the plane of the color conversion film 40, a distance Δ H1 between a side surface 601 of the fixing tape 60 facing away from the first adhesive frame 21 and a side surface 401 of the color conversion film 40 facing away from the lamp panel 10 is set as Δ H1; wherein, | delta H1|, is less than or equal to 0.2 μm.
Specifically, since the fixing tape 60 is located between the first rubber frame 21 and the second rubber frame 22, the second rubber frame 22 covers the fixing tape 60, the first rubber frame 21 and the first extending portion 41 of the color conversion film 40 at the same time, and at this time, the fixing tape 60 and the first extending portion 41 can support the second rubber frame 22 to a certain extent; meanwhile, the distance Δ H1 between the side surface 601 of the fixing tape 60 away from the first rubber frame 21 and the side surface 401 of the color conversion film 40 away from the lamp panel 10 is limited within the range less than or equal to 0.2 μm, which can prevent the fixing tape 60 and/or the first extension part 41 from insufficiently supporting the second rubber frame 22 due to the large height difference between the surface 601 of the fixing tape 60 and the surface 401 of the color conversion film 40, so that the second rubber frame 22 is deformed and damaged, i.e., the second rubber frame 22 can be prevented from being deformed on the premise of having sufficient supporting effect on the second rubber frame 22, thereby prolonging the service life of the second rubber frame 22.
Optionally, fig. 9 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, as shown in fig. 9, when the first surface 201 includes a first region 211 contacting the first extending portion 41 and a second region 212 not overlapping with a vertical projection of the first extending portion 41 on the first surface 201, and the second rubber frame 22 includes a second surface 202 opposite to the first surface 201, the iron frame 30 may further include a first bending portion 33, the first bending portion 33 extends from the side plate 32 toward one side of the color conversion film 40, and in a direction Z perpendicular to a plane of the color conversion film 40, the back plate 31 and the first bending portion 33 are respectively located at two opposite sides of the side plate 32; the first bending part 33 at least covers the second region 212; at this time, one side of the fixing tape 60 is attached to the surface 301 of the first bending portion 33, which is away from the second region 212 of the first adhesive frame 21, and the other side of the fixing tape 60 is attached to the second surface 202.
Thus, the second bending portion 33 and the first rubber frame 21 form a rubber structure with higher strength to improve the supporting capability of the second rubber frame 22; meanwhile, the two sides of the fixing tape 60 are directly attached to the surface 301 and the second surface 202 of the first bending portion 33, so that the second adhesive frame 22 is directly fixed on the bezel 30, and the stability of the second adhesive frame 22 is improved.
Corresponding steps can be formed between the second area 212 of the first surface 201 and at least a portion of the first area 211, so that the accommodating groove formed by the back plate 31, the side plate 32 and the first bending portion 33 is aligned and clamped with the first plastic frame 21, thereby better fixing the first plastic frame 21; meanwhile, the height of the step formed between the second area 212 and the first area 211 of the first surface 201 may be equal to the thickness of the first bending portion 33 in the Z direction, and at this time, the surface 301 of the side of the first bending portion 33 contacting the fixing tape 60 may be flush with the first area 211 contacting the first extending portion 41, so as to facilitate the arrangement of the first adhesive frame 21 and other structures of the side of the first bending portion 33 departing from the back plate 31.
Optionally, with continued reference to fig. 9, the side panel 32 includes a third surface 303 facing away from the first glue frame 21; the securing tape 60 extends to be flush with the third surface 303. In this way, the size of the fixing tape 60 in the X direction can be increased, so that the attachment area of the fixing tape 60 is increased, and the fixing tape 60 can fix the second adhesive frame 22 better.
Optionally, fig. 10 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, as shown in fig. 10, when the first surface 201 includes a first region 211 contacting the first extending portion 41 and a second region 212 that does not overlap with a vertical projection of the first extending portion 41 on the first surface 201, and the second rubber frame 22 includes a second surface 202 opposite to the first surface 201, the iron frame 30 further includes a first bending portion 33 and a second bending portion 34; the first bent portion 33 extends from the side plate 32 toward one side of the color conversion film 40; in a direction Z perpendicular to the plane of the color conversion film 40, the back plate 31 and the first bending portion 33 are respectively located on two opposite sides of the side plate 32; the second bending part 34 extends from the first bending part 33 to a side away from the back plate 31, and in a direction X parallel to the plane of the color conversion film 40, the side plate 32 and the second bending part 34 are respectively located at two opposite sides of the first bending part 33; the first bending part 33 covers at least part of the second region 212; the second surface 202 includes a first groove 2001; the second bending portion 34 is aligned and engaged with the first groove 2002.
Thus, when the second plastic frame 22 is assembled, the first groove 2001 and the second bending portion 34 of the second plastic frame 22 are directly adopted for alignment and engagement, so that the setting position of the second plastic frame 22 can be determined, and the second plastic frame 22 is fixed, thereby simplifying the assembly process of the backlight module 100.
It is understood that the second bending portion 34 may be a continuous structure, or may be a discontinuous structure, and when the second bending portion 34 is a continuous structure, only one first groove 2001 needs to be disposed on the second surface 202 of the second frame 22; when the second bending portion 34 is a discontinuous structure, the second surface 202 of the second frame 22 may be provided with a plurality of first grooves 2001 to form a complementary structure with the discontinuous structure of the second bending portion 34, so that when the first grooves 2001 are aligned and engaged with the discontinuous structure of the second bending portion 34, the second frame 22 can be fixed.
It should be noted that fig. 10 is only an exemplary diagram of the embodiment of the present invention, and fig. 10 only illustrates that the second bending portion 34 is disposed in the chase 30 and the first groove 2001 is disposed on the second surface 202, so as to fix the second glue frame 22. In the embodiment of the present invention, the iron frame and the second rubber frame may be in other engaging manners, which is not limited in the embodiment of the present invention.
Optionally, fig. 11 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, and as shown in fig. 11, the side plate 32 further surrounds at least a portion of the second rubber frame 22; the side plate 32 includes at least one second groove 3002, and the second groove 3002 may be located on a side surface of the side plate 32 close to the first optical assembly 51; one side of the second rubber frame 22, which faces away from the first optical assembly 51, comprises at least one second protrusion 2002 corresponding to the at least one second groove 3002 one to one; the second protrusion 2002 is aligned with and engaged with the second groove 3002.
The second groove 3002 provided on the side plate 32 may penetrate through the side plate 32, so that the second groove 3002 has a larger depth; when the second groove 3002 on the side plate 32 and the second protrusion 2002 on the second plastic frame 22 are adopted for alignment and engagement, the setting position of the second plastic frame 22 can be directly determined, so as to fix the second plastic frame 22, thereby simplifying the assembling process of the backlight module 100. Meanwhile, after the second protrusion 2002 is aligned and engaged with the second groove 3002, a side surface of the second protrusion 2002 facing away from the first optical assembly 51 may be flush with a side of the side plate 32 facing away from the first rubber frame 21, so as to improve the aesthetic property and the practicability of the backlight module 100.
Optionally, the backlight module further comprises an edge-binding adhesive tape, wherein the edge-binding adhesive tape comprises a first adhesive tape part, a second adhesive tape part and a third adhesive tape part which are sequentially connected; the first adhesive tape part is fixed on one side of the back plate, which is far away from the lamp panel; the second adhesive tape part is fixed on one side of the side plate, which is far away from the first adhesive frame; the third adhesive tape part is fixed on one side of the second adhesive frame, which is deviated from the first adhesive frame.
Specifically, taking the configuration shown in fig. 11 as an example, the edge banding tape 70 includes a first tape part 71, a second tape part 72, and a third tape part 73 that are connected in this order. The first adhesive tape part 71 is fixed on one side of the back plate 31 departing from the lamp panel 10; the second rubber belt part 72 is fixed on one side of the side plate 32 departing from the first rubber frame 21; the third rubber belt part 73 is fixed on one side of the second rubber frame 22 departing from the first rubber frame 21; therefore, the iron frame 30 and the second rubber frame 22 can be wrapped in the edge-binding adhesive tape 70, so that the iron frame 30 and the second rubber frame 22 are fixed together by the edge-binding adhesive tape 70, and the stability of the backlight module 100 can be improved.
Optionally, continuing to take fig. 11 as an example, the second rubber frame 22 has a step structure, the step structure includes a first portion 221 and a second portion 222, the first portion 221 has a first step surface 2201, and the second portion 222 has a second step surface 2202; the first step surface 2201 and the second step surface 2202 are both positioned on the surface of one side of the second rubber frame 22, which is far away from the first rubber frame 21; the first portion 221 is located on a side of the second portion 222 facing away from the first optical assembly 51; a distance H1 between first step surface 2201 and first surface 201 is greater than a distance H2 between second step surface 2202 and first surface 201; the light-shielding tape 80 is disposed on the second step surface 2202, and the light-shielding tape 80 extends to a side of the first optical assembly 51 away from the color conversion film 40.
Thus, by providing the light-shielding tape 80 on the second step surface 2202, and extending the light-shielding tape 80 to the side of the first optical component 51 departing from the color conversion film 40, the light-shielding tape 80 can shield the light leaked from the gap between the first optical component 51 and the second adhesive frame 22, so as to prevent the non-light-emitting position from emitting light, thereby affecting the display effect, and further improving the display effect. Meanwhile, the second rubber frame 22 is configured as the step structure 220, so that the second step surface 2202 can support and protect a display panel (not shown in the figure) disposed on a side of the first optical assembly 51 away from the color conversion film 40.
Optionally, continuing with fig. 11 as an example, a reflective tape 90 is disposed between the lamp panel 10 and the back panel 31; the reflective tape 90 can fix the lamp panel 10 on the back panel 31; meanwhile, the reflective tape 90 can also have a certain reflective function, so as to reflect light emitted from the surface of one side of the lamp panel 10 close to the back panel 31 to the light emitting side 101 of the lamp panel 10, thereby improving the utilization rate of the light.
Based on the same inventive concept, the embodiment of the invention also provides a display device, which comprises a display panel and the backlight module provided by the embodiment of the invention. Therefore, the display device provided by the embodiment of the present invention has the technical features of the backlight module provided by the embodiment of the present invention, and can achieve the beneficial effects of the backlight module provided by the embodiment of the present invention.
For example, fig. 12 is a schematic diagram of a film structure of a display device according to an embodiment of the present invention, fig. 13 is a schematic diagram of a top-view structure of a display device according to an embodiment of the present invention, and referring to fig. 12 and fig. 13, a display panel 200 of a display device 300 is located on a side of the first optical assembly 51 of the backlight module 100 away from the color conversion film 40 and covers at least a portion of the second frame 22; so that the second glue frame 22 can support the display panel 200 to a certain extent. The display panel 200 may be a liquid crystal display panel, and the display panel 200 includes an array substrate 210, a color filter substrate 220, and a liquid crystal layer (not shown) located between the array substrate 210 and the color filter substrate 220. In addition, the display device 300 may further include an upper polarizer 240 disposed on the upper surface of the display panel 200 and a lower polarizer 230 disposed on the lower surface of the display panel 200.
It is understood that the display device 300 may be a mobile phone, a computer, a smart wearable device, or other devices with a display function.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (15)
1. A backlight module, comprising:
the lamp panel comprises a plurality of light-emitting elements arranged in an array;
the first rubber frame is arranged around the lamp panel;
the iron frame comprises a back plate and a side plate; the back plate is positioned on one side of the lamp panel, which is far away from the light-emitting surface; the side plate surrounds the first rubber frame, and the first rubber frame is fixed on one side, close to the lamp panel, of the side plate;
the color conversion film is positioned on the light emergent surface side of the lamp panel and extends to the first surface of the first rubber frame; the part of the color conversion film, which is in contact with the first surface, is a first extension part; the first surface is the surface of one side of the first rubber frame, which is deviated from the back plate;
the first optical assembly is positioned on one side, away from the lamp panel, of the color conversion film;
the second rubber frame covers the side plate, the first rubber frame and the first extending part and at least surrounds the first optical assembly.
2. The backlight module according to claim 1, further comprising a fixing tape disposed between the first and second frames and on a side of the color conversion film adjacent to the side plate.
3. The backlight module according to claim 2, wherein the first surface comprises a first region contacting the first extension and a second region not overlapping with the first extension in a vertical projection of the first extension on the first surface; the second rubber frame comprises a second surface opposite to the first surface;
one side of the fixing adhesive tape is attached to the second area of the first surface, and the other side of the fixing adhesive tape is attached to the second surface.
4. The backlight module according to claim 2, wherein the first surface comprises a first region contacting the first extension and a second region not overlapping with the first extension in a vertical projection of the first extension on the first surface; the second rubber frame comprises a second surface opposite to the first surface;
the iron frame further comprises a first bending part; the first bent part extends from the side plate to one side of the color conversion film; in the direction perpendicular to the plane of the color conversion film, the back plate and the first bending part are respectively positioned at two opposite sides of the side plate; the first bending part at least covers the second area;
one side of the fixing adhesive tape is attached to one side surface of the first bending part, which is away from the second area of the first adhesive frame, and the other side of the fixing adhesive tape is attached to the second surface.
5. The backlight module according to claim 4, wherein the side plate comprises a third surface facing away from the first rubber frame;
the securing tape extends to be flush with the third surface.
6. The backlight module according to claim 2, wherein in a direction perpendicular to the plane of the color conversion film, a distance Δ H1 between a surface of the fixing tape facing away from the first frame and a surface of the color conversion film facing away from the lamp panel; wherein, | delta H1|, is less than or equal to 0.2 μm.
7. The backlight module according to claim 1, wherein the first surface comprises a first region contacting the first extension and a second region not overlapping with the first extension in a vertical projection of the first extension on the first surface; the second rubber frame comprises a second surface opposite to the first surface;
the iron frame further comprises a first bending part and a second bending part; the first bent part extends from the side plate to one side of the color conversion film; in the direction perpendicular to the plane of the color conversion film, the back plate and the first bending part are respectively positioned at two opposite sides of the side plate; the second bending part extends from the first bending part to one side departing from the back plate, and in the direction parallel to the plane of the color conversion film, the side plate and the second bending part are respectively positioned at two opposite sides of the first bending part; the first bending part covers at least part of the second area;
the second surface comprises a first groove; the second bending part is in alignment clamping with the first groove.
8. A backlight module according to claim 1, wherein the side plate further surrounds at least a portion of the second frame; the side plate comprises at least one second groove; one side of the second rubber frame, which is far away from the first optical assembly, comprises at least one second protrusion which is in one-to-one correspondence with at least one second groove; the second protrusion is in alignment clamping with the second groove.
9. The backlight module of claim 1, further comprising: the edge binding adhesive tape comprises a first adhesive tape part, a second adhesive tape part and a third adhesive tape part which are sequentially connected;
the first adhesive tape part is fixed on one side of the backboard, which is far away from the lamp panel;
the second adhesive tape part is fixed on one side of the side plate, which is far away from the first adhesive frame;
the third adhesive tape portion is fixed on one side, away from the first adhesive frame, of the second adhesive frame.
10. A backlight module according to claim 1, wherein the light emitting elements emit blue light;
the first rubber frame and/or the second rubber frame are yellow rubber frames.
11. The backlight module of claim 1, further comprising: a second optical assembly located between the lamp panel and the color conversion film.
12. The backlight module according to claim 11, wherein a distance between a side surface of the second optical assembly facing away from the lamp panel and the first surface in a direction perpendicular to a plane of the color conversion film is Δ H2; wherein, | delta H2|, is less than or equal to 0.2 μm.
13. The backlight module as claimed in claim 1, wherein the second frame has a step structure, the step structure comprises a first portion and a second portion, the first portion has a first step surface, and the second portion has a second step surface;
the first step surface and the second step surface are both positioned on the surface of one side, away from the first rubber frame, of the second rubber frame; the first part is positioned on one side of the second part, which faces away from the first optical assembly; the distance between the first step surface and the first surface is greater than the distance between the second step surface and the first surface;
and a shading adhesive tape is arranged on the second step surface and extends to one side of the first optical assembly deviating from the color conversion film.
14. The backlight module according to claim 1, wherein a reflective tape is disposed between the lamp panel and the back plate.
15. A display device, comprising: a display panel and a backlight module according to any one of claims 1 to 14;
the display panel is located on one side, away from the color conversion film, of the first optical assembly and covers at least part of the second rubber frame.
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| CN202111145927.0A CN113835266B (en) | 2021-09-28 | 2021-09-28 | Backlight module and display device |
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| CN202111145927.0A CN113835266B (en) | 2021-09-28 | 2021-09-28 | Backlight module and display device |
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| CN113835266B CN113835266B (en) | 2023-04-07 |
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