CN107238971B - Combined light guide plate, backlight assembly and display panel - Google Patents
Combined light guide plate, backlight assembly and display panel Download PDFInfo
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- CN107238971B CN107238971B CN201710455733.8A CN201710455733A CN107238971B CN 107238971 B CN107238971 B CN 107238971B CN 201710455733 A CN201710455733 A CN 201710455733A CN 107238971 B CN107238971 B CN 107238971B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a combined light guide plate, a backlight assembly and a display panel. The combined light guide plate includes: a flexible film; the adhesive layer is arranged on the flexible film; the light guide plate single bodies are sequentially arranged along a first direction, each light guide plate single body is provided with a first end face and a second end face which are oppositely arranged in the first direction, and a first side face which is respectively connected with the first end face and the second end face, and the first side face of each light guide plate single body is bonded with the bonding layer; and the reflecting layer is arranged on the first end face and/or the second end face of the light guide plate monomer. The combined light guide plate provided by the invention has better bending performance as a whole, curved surface display can be realized through the partition of the light guide plate monomer, and the partition boundary can be lightened by the flexible film and the bonding layer.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a combined light guide plate, a backlight assembly and a display panel.
Background
Lcd (liquid Crystal display), which is a liquid Crystal display, controls the turning of liquid Crystal molecules by applying voltage to electrodes on both sides of the liquid Crystal molecules, thereby controlling whether light is emitted or not, and further realizing display function. Since liquid crystal molecules cannot self-emit light, a backlight source is required to be arranged in the existing liquid crystal display structure for emitting light.
Light-Emitting diodes (LEDs) are the best choice for the backlight source due to their advantages of high Light-Emitting efficiency, low power consumption, long service life, etc. In the prior art, the backlight mainly has two modes of side-in type and direct-down type. The lateral-entering type LED backlight source is characterized in that an LED light source is arranged on one side of the end part of a light guide plate, light paths of light emitted by the light source are changed through mesh points on the light guide plate, the light is emitted from a light emitting surface of the light guide plate, and then a uniform surface light source is obtained through optical films such as diffusion films, light intensifying films and the like. The direct type LED backlight is that the LEDs are uniformly arranged below the liquid crystal panel, and the backlight can be uniformly transmitted to the whole panel.
With the development of technology, users have higher and higher requirements for product experience, and the flexible display panel becomes a popular object, and the flexible display panel requires that its backlight assembly also have flexible characteristics. At present, the direct type LED backlight source can meet the setting of curved surface backlight, LEDs can still emit light along the radial direction of the curved surface after the curved surface backlight source is made, the display effect of a panel is not affected, but the direct type LED backlight source needs to be provided with more LEDs, and the power consumption is large. And the lateral entering type LED light source can reduce the use of LEDs and achieve the purpose of reducing power consumption.
The schematic diagram of the emergent light of the LED lamps in the side-in LED backlight source is shown in fig. 1, and the emergent light of each LED lamp 101 in the side-in LED backlight source can be distributed to the whole backlight, if the emergent light is bent along the central line S in fig. 1, the emergent light of the left LED lamp 101 is affected on the right light path, and the emergent light of the right LED lamp 101 is affected on the left light path, so that the display effect of the whole panel is affected.
Therefore, it is an urgent problem to be solved in the art to provide a combined light guide plate, a backlight module and a display panel to improve the display effect of a curved panel using a side-in LED backlight.
Disclosure of Invention
In view of the above, the present invention provides a combined light guide plate, a backlight assembly and a display panel, which solve the above technical problems.
The invention provides a combined light guide plate, comprising:
a flexible film;
the adhesive layer is arranged on the flexible film;
the light guide plate single bodies are sequentially arranged along a first direction, each light guide plate single body is provided with a first end face and a second end face which are oppositely arranged in the first direction, and a first side face which is respectively connected with the first end face and the second end face, and the first side face of each light guide plate single body is bonded with the bonding layer; and
and the reflecting layer is arranged on the first end face and/or the second end face of the light guide plate monomer.
Optionally, the light guide plate further includes: the boundary line fading layer is arranged between the light guide plate monomer and the flexible film;
the boundary line thinning-out layer covers at least a region between adjacent light guide plate monomers.
Optionally, the boundary line thinning-out layer includes diffusing particles.
Optionally, the boundary line thinning layer is disposed on a side of the adhesive layer close to the light guide plate monomer.
Optionally, the boundary line thinning layer is a bonding layer doped with diffusion particles.
Optionally, the light guide plate monomer has a second side surface opposite to the first side surface, the first side surface is parallel to the second side surface, the first end surface is parallel to the second end surface, and the widths of the light guide plate monomers in the first direction are equal.
Optionally, the light guide plate monomer is a cuboid, and the lengths of the long edges of the light guide plate monomers are equal.
Optionally, the flexible film is a polyester film, and the light transmittance of the polyester film is greater than or equal to 90%.
Optionally, the material of the bonding layer is optical glue.
The present invention also provides a backlight assembly including:
the combined light guide plate is any one of the combined light guide plates, and the combined light guide plate is provided with a third end surface and a fourth end surface which are oppositely arranged in a second direction, and the second direction is perpendicular to the first direction and is parallel to the first side surface of the light guide plate monomer; and
and the light source is positioned on one side of the third end surface of the combined light guide plate.
Optionally, the light source comprises a plurality of LED lamps;
the light guide plate monomer is arranged corresponding to one or more LED lamps.
Optionally, the light guide plate monomers and the plurality of LED lamps are arranged correspondingly, and the number of the LED lamps corresponding to each light guide plate monomer is the same.
Optionally, the light source is an integrated LED light bar, the integrated LED light bar includes an LED light, and a light emitting surface of the LED light faces the third end surface of the combined light guide plate.
Optionally, the backlight assembly further includes: the combined rubber frame is made of a polyester film;
the combined rubber frame comprises a first rubber frame and a second rubber frame, the first rubber frame is in a closed first shape, the second rubber frame is in a first shape with an opening, and the first rubber frame and the second rubber frame are overlapped and bonded;
the combined light guide plate and the light source are arranged in the combined rubber frame, and the light source is positioned at the opening of the second rubber frame.
Optionally, the backlight assembly further includes: the combined rubber frame is made of a polyester film;
the combined rubber frame comprises a third rubber frame and a fourth rubber frame, two end parts of the third rubber frame and two end parts of the fourth rubber frame are respectively attached to form a closed first shape, and the thickness of the third rubber frame is larger than that of the fourth rubber frame;
the combined light guide plate and the light source are arranged in the combined rubber frame, and the light source is positioned at the fourth rubber frame.
Optionally, the first shape is a rectangle;
the combined rubber frame comprises a first edge close to the light source and a second edge arranged opposite to the first edge;
a plurality of notches are arranged on the first edge and/or the second edge, and the depth of each notch is smaller than the height of the first edge and/or the second edge in the direction vertical to the plane of the combined light guide plate;
the position of the notch corresponds to the area between the adjacent light guide plate monomers.
Optionally, the thickness of the first edge and the second edge at the position of the notch is greater than or equal to 0.1 mm.
The invention also provides a display panel comprising any one of the backlight assemblies.
Compared with the prior art, the combined light guide plate, the backlight assembly and the display panel have the following beneficial effects that:
the combined light guide plate comprises a plurality of light guide plate monomers which are sequentially arranged along a first direction, wherein the light guide plate monomers are fixed through a flexible film and an adhesive layer to form the combined light guide plate; meanwhile, the first end face and/or the second end face of each light guide plate monomer are/is provided with the reflecting layer, so that the light path in each light guide plate monomer is independent, and for the combined light guide plate, the light path of the combined light guide plate has a partition function, so that when the combined light guide plate is bent along the first direction, light rays in each area, namely the light guide plate monomer, are reflected in the combined light guide plate and then are emitted from the emergent face, and the curved surface display performance of the combined light guide plate is realized; and thirdly, the flexible film and the bonding layer in the combined light guide plate are both tiled in the arrangement direction of the light guide plate monomers, so that the partition boundary between the light guide plate monomers can be lightened, and the influence of the partition boundary of the combined light guide plate on the display effect can be better improved. The combined light guide plate provided by the invention has better bending performance as a whole, curved surface display can be realized through the partition of the light guide plate monomer, and the partition boundary can be lightened by the flexible film and the bonding layer, so that the display effect of the curved surface screen can be improved after the combined light guide plate provided by the invention is matched with the curved surface screen.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of emergent light of a side-entry light source LED lamp in the prior art;
FIG. 2 is a schematic top view of a combined light guide plate according to an embodiment of the present invention
FIG. 3 is a schematic cross-sectional view of the assembled light guide plate at the position of the tangent line Q1 in FIG. 2;
FIG. 4 is a schematic cross-sectional view of another alternative embodiment of a combination light guide plate according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view illustrating a plurality of light guide plate monomers arranged in sequence along a first direction according to an alternative embodiment of the present invention;
fig. 6 is a schematic cross-sectional view illustrating a plurality of light guide plate monomers arranged in sequence along a first direction according to another alternative embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of an alternative embodiment of a combination light guide plate according to an embodiment of the present invention;
FIG. 8a is a schematic cross-sectional view of another alternative embodiment of a combination light guide plate according to an embodiment of the present invention;
FIG. 8b is a schematic cross-sectional view of another alternative embodiment of a combination light guide plate according to an embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of a plurality of light guide plate units sequentially arranged along a first direction according to another alternative embodiment of the present invention;
fig. 10 is a schematic top view illustrating a plurality of light guide plate units sequentially arranged along a first direction according to an embodiment of the present invention;
FIG. 11 is a schematic top view of a backlight assembly according to an embodiment of the present invention;
FIG. 12 is a cross-sectional view of the backlight assembly at the position of the cut line Q2 in FIG. 11;
FIG. 13 is a schematic top view of an alternative embodiment of a backlight assembly according to an embodiment of the present invention;
FIG. 14 is a schematic top view of another alternative embodiment of a backlight assembly according to an embodiment of the present invention;
FIG. 15a is a schematic cross-sectional view of a combined light guide plate with two light guide plate monomers participating in surface fitting;
FIG. 15b is a schematic cross-sectional view of a combined light guide plate with three light guide plate monomers participating in surface fitting;
FIG. 16 is a schematic top view of another alternative embodiment of a backlight assembly according to an embodiment of the present invention;
FIG. 17 is a schematic top view of another alternative embodiment of a backlight assembly according to an embodiment of the present invention;
FIG. 18 is a top view of an alternative embodiment of a combo-adhesive frame in a backlight assembly according to an embodiment of the present invention;
FIG. 19a is a schematic cross-sectional view of an alternative embodiment of a first side of a combo frame in a backlight assembly according to an embodiment of the present invention;
FIG. 19b is a schematic cross-sectional view of an alternative embodiment of a second side of a combo-frame in a backlight assembly according to an embodiment of the present invention;
FIG. 20 is a top view of an alternative embodiment of a combo-adhesive frame in a backlight assembly according to an embodiment of the present invention;
FIG. 21a is a schematic cross-sectional view of another alternative embodiment of a first side of a combo frame in a backlight assembly according to an embodiment of the present disclosure;
fig. 21b is a schematic cross-sectional view of another alternative implementation of the second edge of the combo glue frame in the backlight assembly according to the embodiment of the invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 2 and 3, fig. 2 is a schematic top view of a light guide plate assembly according to an embodiment of the present invention, and fig. 3 is a schematic cross-sectional view of the light guide plate assembly according to an embodiment of the present invention, including: the light guide plate comprises a flexible film 202, an adhesive layer 203, a plurality of light guide plate single bodies 204 arranged in sequence along a first direction a, and a reflecting layer 205 arranged on the end face of the light guide plate single bodies 204.
As shown in fig. 2, the combined light guide plate includes a plurality of light guide plate units 204 arranged in sequence along a first direction a, a reflective layer 205 is disposed on an end surface of the light guide plate unit 204, an optical path of a light ray G in the light guide plate unit is schematically shown in fig. 2, and the reflective layer 205 disposed in the combined light guide plate makes the optical path in each light guide plate unit 204 independent.
Fig. 3 is a schematic cross-sectional view of the combined light guide plate at a position of a cut line Q1 in fig. 2, and as shown in fig. 3, the adhesive layer 203 is disposed on the flexible film 202, wherein the light guide plate units 204 have a first end surface M1 and a second end surface M2 (i.e., each light guide plate unit 204 has left and right end surfaces in the first direction a) oppositely disposed, a first side surface C1 connected to the first end surface M1 and the second end surface M2, respectively, the first side surface C1 of the light guide plate unit 204 is adhered to the adhesive layer 203, and the reflective layer 205 is disposed on the first end surface M1 and/or the second end surface M2 of the light guide plate unit 204.
Fig. 3 shows a case where the reflective layers 205 are simultaneously disposed on the first end face M1 and the second end face M2 of the single light guide plate 204, that is, the reflective layers 205 are disposed on both left and right end faces of each single light guide plate 204, and each single light guide plate 204 realizes the independence of the light paths by the reflection action of the reflective layers 205 disposed on both end faces of the single light guide plate 204. Alternatively, the reflective layer 205 may be provided only on one end surface of the single light guide plate 204, and as shown in fig. 4, each single light guide plate 204 shares the left reflective layer 205 with the previous single light guide plate 204 and shares the right reflective layer 205 with the next single light guide plate 204 along the first direction a.
It should be noted that the cross-sectional shape of the light guide plate unit 204 is not limited to the regular rectangular shape shown in fig. 3, and the cross-sectional schematic diagram of the plurality of light guide plate units 204 arranged in sequence along the first direction a may also be as shown in fig. 5 or fig. 6, and the cross-sectional shape of the light guide plate unit along the first direction may be determined according to the design requirement. The light guide plate units 204 may be the same light guide plate unit 204 as shown in fig. 3, or the light guide plate units 204 having different width specifications in the first direction a may be manufactured according to design requirements, and since the light guide plate units 204 may be manufactured separately, combined light guide plates having various shapes may be flexibly obtained by freely designing the shape and size of each light guide plate unit 204, so as to be suitable for display devices having various shapes and sizes. Optionally, the width of the middle light guide plate monomer in the first direction may be set to be smaller than the width of the light guide plate monomers at the two ends in the first direction, for the curved surface display panel, the bending degree of the center of the display panel is greater than the two ends, and the width of the middle light guide plate monomer is smaller than the two ends, which is beneficial to the bending structure of the display panel.
The combined light guide plate provided by the embodiment comprises a plurality of light guide plate monomers which are sequentially arranged along a first direction, the light guide plate monomers are fixed to form the combined light guide plate through a flexible film and an adhesive layer, each light guide plate monomer in the combined light guide plate is adhered to the flexible film, and each light guide plate monomer is combined into a whole by taking the flexible film as a reference, so that when the combined light guide plate is bent along the first direction, each light guide plate monomer can face a required curved surface by taking the flexible film as a reference, dislocation and slippage cannot occur among the light guide plate monomers, and the bending performance of the combined light guide plate is realized; meanwhile, the first end face and/or the second end face of each light guide plate monomer are/is provided with the reflecting layer, so that the light path in each light guide plate monomer is independent, and for the combined light guide plate, the light path of the combined light guide plate has a partition function, so that when the combined light guide plate is bent along the first direction, light rays in each area, namely the light guide plate monomer, are reflected in the combined light guide plate and then are emitted from the emergent face, and the curved surface display performance of the combined light guide plate is realized; and thirdly, the flexible film and the bonding layer in the combined light guide plate are both tiled integrally, and a plurality of light guide plate monomers sequentially arranged along the first direction are arranged on the flexible film and the bonding layer, so that the partition boundary between the light guide plate monomers can be lightened, and the influence of the partition boundary of the combined light guide plate on the display effect is better improved.
To sum up, the combined light guide plate provided by the embodiment has better bending performance as a whole, curved surface display can be realized through the single partition of the light guide plate, and the partition boundary can be lightened by the flexible film and the bonding layer, so that the display effect of the curved surface screen can be improved after the combined light guide plate provided by the embodiment is matched with the curved surface screen.
Further, in some alternative embodiments, the combination light guide plate further includes a boundary line dimming layer disposed between the light guide plate unit and the flexible film, the boundary line dimming layer covering at least a region between adjacent light guide plate units. The boundary line desalination layer can be arranged between the flexible thin film and the bonding layer, or between the bonding layer and the light guide plate monomer, or the boundary line desalination layer and the bonding layer can be integrated into a layer to be arranged between the light guide plate monomer and the flexible thin film. The boundary line desalination layer can cover all the light guide plate monomers integrally and plays a role in fixing the light guide plate monomers together with the flexible thin film and the bonding layer, or the boundary line desalination layer at least covers the area between the adjacent light guide plate monomers, and the boundary line desalination layer can play a role in further desalinating the boundary lines between the light guide plate monomers, so that the integral display effect of the display panel is improved.
Further, in some alternative embodiments, the boundary-fade layer includes diffusing particles. The light rays passing through the boundary fading layer can be refracted, reflected and scattered for many times in the boundary fading layer, so that the optical diffusion effect is realized, the light rays are atomized and then uniformly emitted, the boundary between the light guide plate monomers is effectively faded, and the overall display effect of the display panel is improved.
Further, in some alternative embodiments, the boundary line desalination layer is disposed on a side of the adhesive layer adjacent to the single light guide plate. Specifically, this embodiment provides a schematic cross-sectional view of a combined light guide plate, as shown in fig. 7, including: the backlight module includes a flexible film 302, an adhesive layer 303, a plurality of light guide plate units 304 arranged in sequence along a first direction a, a reflective layer 305, and a boundary line-thinning layer 306 disposed on a side of the adhesive layer 303 adjacent to the light guide plate units 304, wherein the boundary line-thinning layer 306 covers at least a region between the adjacent light guide plate units 304. The boundary line thinning layer 306 can play a role in thinning the boundary lines between the light guide plate monomers 304, thereby improving the overall display effect of the display panel.
Further, in some alternative embodiments, the boundary-line thinning layer is a bonding layer doped with diffusing particles. In this embodiment, the diffusion particles are doped in the bonding layer, and the bonding layer plays a role in bonding and fixing the flexible film and the light guide plate monomer, and simultaneously can weaken the boundary between the light guide plate monomers and improve the overall display effect of the display panel. The boundary thinning layer and the bonding layer are integrated into one layer, so that the thickness of the light guide plate and the group can be thinned, and the thinned backlight assembly can be manufactured.
Specifically, as shown in fig. 8a and 8b, fig. 8a is a schematic diagram of doping the diffusion particles Z in the bonding layer 303 at a position corresponding to the boundary region S between the light guide plate monomers 304, and fig. 8b is a schematic diagram of doping the diffusion particles Z in the bonding layer 303 as a whole. The combined light guide plate includes: the flexible film 302, the adhesive layer 303, the plurality of light guide plate units 304 arranged in this order in the first direction a, the reflective layer 305, and the boundary line thinning layer 306 are the adhesive layer 303 doped with diffusion particles.
Further, in some alternative embodiments, as shown in fig. 9, the light guide plate units 404 have a second side surface C2 opposite to the first side surface C1, the first side surface C1 is parallel to the second side surface C2, the first end surface M1 is parallel to the second end surface M2, the first end surface M1 and the second end surface M2 of the light guide plate unit 404 are simultaneously provided with the reflective film 405, and the widths d of the light guide plate units 404 in the first direction a are equal. The width d of each light guide plate monomer 404 in the first direction is set to be equal, so that the number of molds and the debugging times of the light guide plates during manufacturing can be saved; secondly, the specifications of the LED lamps used in the same backlight assembly are generally the same, and when the widths d of the light guide plate monomers 404 in the first direction are equal, the number of the LED lamps corresponding to each light guide plate monomer is the same, and the sizes of the respective light path partitions in each light guide plate monomer are the same, so that the display effect during curved surface display is improved; thirdly, when the combination light guide plate and the LED backlight are assembled, since the individual light guide plates have the same width, it is easy to avoid the situation that the assembled LED lamp directly corresponds to the boundary region of the individual light guide plates, and the assembly process is simple.
Further, in some alternative embodiments, a plurality of light guide plate units are sequentially arranged along the first direction a, as shown in fig. 10, the light guide plate unit 504 is a cuboid, the lengths L of the long sides of the light guide plate units 504 are equal, so that a combined light guide plate which is a cuboid as a whole is formed, and is applied to a display device whose display panel is a rectangle, and the left and right end faces of the light guide plate unit 504 along the first direction a are simultaneously provided with a reflective film 505. The combined light guide plate provided by the embodiment can flexibly set the width of the light guide plate monomer along the first direction a so as to adapt to display devices with different curved surface requirements.
Further, in some alternative embodiments, the flexible film is a polyester film having a light transmittance of greater than or equal to 90%. Preferably, the flexible film can be an optical-grade polyester film, has the characteristics of high light transmittance and low haze, ensures the intensity of emergent light of the combined light guide plate, has the characteristics of good film smoothness, good operation performance, good coating performance and the like, is not easy to scratch in post-treatment, is not easy to generate surface defects, and has good quality of the manufactured combined light guide plate.
Further, in some alternative embodiments, the material of the adhesive layer is optical glue. The optical adhesive has the characteristics of colorless transparency, light transmittance of more than 90 percent and good bonding strength, and the bonding layer adopts the optical adhesive to play a role in bonding and fixing the flexible film and the light guide plate monomer without influencing the intensity of emergent light of the combined light guide plate.
Further, an embodiment of the present invention further provides a backlight assembly, including the combined light guide plate according to the above embodiment, specifically, referring to fig. 11 and fig. 12, fig. 11 is a schematic top view of the backlight assembly according to the embodiment of the present invention, and fig. 12 is a schematic cross-sectional view of the backlight assembly at a position of a tangent line Q2 in fig. 11.
As shown in fig. 11, the backlight assembly includes: a combination light guide plate 607 and a light source 608, wherein the combination light guide plate 607 includes a plurality of light guide plate monomers 604 sequentially arranged along a first direction a. A cross-sectional view of the backlight assembly at the position of the tangent line Q2 in fig. 11 is shown in fig. 12, and the backlight assembly includes: the light guide plate 607 is combined with the light source 608, wherein the combined light guide plate 607 has a third end surface M3 ' and a fourth end surface M4 ' (i.e., both left and right end surfaces of the combined light guide plate 607 as viewed in the viewing angle of fig. 12) which are oppositely arranged in a second direction b, which is perpendicular to the first direction a and parallel to the first side surface of the light guide plate single body (not shown), and the light source 608 is located at one side of the third end surface M3 ' of the combined light guide plate 607.
The combined light guide plate in the backlight assembly provided by the embodiment is the combined light guide plate described in any embodiment, and comprises a plurality of light guide plate monomers which are sequentially arranged along a first direction, the light guide plate monomers are fixed to form the combined light guide plate through a flexible film and an adhesive layer, each light guide plate monomer in the combined light guide plate is adhered to the flexible film, and each light guide plate monomer is combined into a whole by taking the flexible film as a reference, so that when the combined light guide plate is bent along the first direction, each light guide plate monomer can face a required curved surface by taking the flexible film as a reference, the bending performance of the combined light guide plate is realized, and the backlight assembly also has the bending performance; meanwhile, the first end face and/or the second end face of each light guide plate monomer are/is provided with the reflecting layer, so that the light path in each light guide plate monomer is independent, and for the combined light guide plate, the light path of the combined light guide plate has a partition function, so that when the combined light guide plate is bent along the first direction, light rays in each area, namely the light guide plate monomer, are reflected in the combined light guide plate and then emitted out from the emergent face, and the curved surface display performance of the backlight assembly is realized; and thirdly, the flexible film and the bonding layer in the combined light guide plate are both tiled in the arrangement direction of the light guide plate monomers, so that the partition boundary between the light guide plate monomers can be lightened, and the influence of the partition boundary of the combined light guide plate on the display effect can be better improved.
In summary, the backlight assembly provided by the embodiment has better bending performance, curved surface display can be realized through the partition of the light guide plate monomer, and the partition boundary can be reduced by the flexible film and the bonding layer, so that the display effect of the curved surface screen can be improved after the backlight assembly provided by the embodiment is matched with the curved surface screen.
Further, in some alternative embodiments, a schematic top view of a backlight assembly is shown in fig. 13, where the light source 608 includes a plurality of LED lamps 601; the light guide plate 604 is disposed corresponding to one LED lamp 601. The light guide plate single body 604 in the backlight assembly may also be disposed corresponding to a plurality of LED lamps 601, and the number of LED lamps 601 corresponding to each light guide plate single body 604 may be different. The number of the LED lamps 601 corresponding to the light guide plate single body 604 can be flexibly set according to the requirement of the curved surface design.
Further, in some optional embodiments, the light guide plate unit is disposed corresponding to a plurality of LED lamps, and the number of the LED lamps corresponding to each light guide plate unit is the same. Fig. 14 exemplarily shows the case of 2 LED lamps 601 corresponding to each light guide plate single body 604.
In this embodiment, the number of the LED lamps corresponding to each light guide plate monomer is the same, and then the light guide plate monomer has the same specification, so that the number of the dies during manufacturing can be reduced, the process is simple, the debugging times of the light guide plate can be reduced, meanwhile, the number of the LED lamps corresponding to each light guide plate monomer is the same, the size of the light path partition realized by each light guide plate is the same, and the display effect during curved surface display is improved.
In the backlight assembly provided by the embodiment of the invention, the light source 608 includes a plurality of LED lamps 601, and when the light guide plate single body 604 is disposed corresponding to one LED lamp 601, the curved surface performance of the combined light guide plate is the best. The process of bending the combined light guide plate along the first direction is equivalent to performing curve fitting on the combined light guide plate along the first direction, and the light guide plate monomers 604 are corresponding to line segments participating in the curve fitting, as shown in fig. 15a, a schematic cross-sectional view of the combined light guide plate in which two light guide plate monomers 604 participate in the curve fitting is shown, where the combined light guide plate includes a flexible film 602, an adhesive layer 603, two light guide plate monomers 604, and a reflective layer 605 disposed on an end surface of the light guide plate monomers 604. Fig. 15b is a schematic cross-sectional view of a combined light guide plate with three light guide plate monomers 604 participating in surface fitting, wherein the combined light guide plate comprises a flexible film 602, an adhesive layer 603, three light guide plate monomers 604 and a reflective layer 605 disposed on an end surface of the light guide plate monomers 604. Therefore, the more the light guide plate monomers 604 participating in fitting, the better the fitting effect, when the light source 608 includes a plurality of LED lamps 601, the light guide plate monomers 604 and one LED lamp 601 are correspondingly arranged, so that the number of the light guide plate monomers 604 participating in curve fitting is large, and at this time, the curved surface performance of the combined light guide plate is good.
Further, in some alternative embodiments, as shown in fig. 16, the light source 608 is an integrated LED light bar, the integrated LED light bar includes one LED lamp 601, a light emitting surface of the LED lamp faces the third end surface M3' of the combined light guide plate, the combined light guide plate shown in fig. 16 is composed of light guide plate monomers 604 with different specifications, and the combined light guide plate shown in fig. 17 is composed of light guide plate monomers 604 with the same specification.
Adopt integration LED lamp strip, the light source includes an LED lamp, light is from light emitting area directive combination light guide plate, the LED lamp strip of integration itself has certain bending property along the first direction, need not consider the corresponding relation that sets up of light guide plate monomer and LED lamp during the preparation, the light intensity in each light guide plate monomer is the same, curved surface display panel's luminance homogeneous, the free size of light guide plate can design into different specifications according to curved surface design demand simultaneously, can rationally set up light guide plate monomer quantity, in order to promote backlight unit's curved surface performance.
Further, in some alternative embodiments, the backlight assembly further includes: the combined rubber frame is used for fixing the combined light guide plate and the light source and protecting the combined light guide plate and the light source, and is made of a polyester film; the combined rubber frame comprises a first rubber frame and a second rubber frame, the first rubber frame is in a closed first shape, the second rubber frame is in a first shape with an opening, and the first rubber frame and the second rubber frame are overlapped and bonded; the combined light guide plate and the light source are arranged in the combined rubber frame, and the light source is positioned at the opening of the second rubber frame.
In this embodiment, the shape of the composite plastic frame is not limited, and may be circular, oval or rectangular, wherein the first shape is rectangular, and fig. 18, fig. 19a and fig. 19b are referred to, and the top view of the concrete composite plastic frame is shown in fig. 18, the first plastic frame 11 is a closed rectangle, the second plastic frame 12 is a rectangle with an opening, and the first plastic frame 11 and the second plastic frame 12 are overlapped and bonded to form the composite plastic frame 609. Compared with an integrated rubber frame, the combined rubber frame has the advantages that the bending performance of the rubber frame is improved, and the combined rubber frame can meet the requirement of higher curvature. The combined rubber frame is used for fixing the combined light guide plate and the light source, the opening formed in the second rubber frame is used for arranging the light source, and the width of the frame area of the frame where the light source of the display panel is located is only the width of the light source, so that the narrowing of the frame is facilitated.
In this embodiment provides backlight unit, the combination light guide plate has better bending property as a whole, can realize the curved surface through the free subregion of light guide plate and show, and flexible film and tie coat can thin the subregion limit, backlight unit and curved surface screen match the back, can promote the display effect of curved surface screen, and simultaneously, still include the combination frame that glues frame coincide bonding by first gluey frame and second and form among the backlight unit that this embodiment provided, and the adoption of combination frame material has flexible polyester film, have flexibility, difficult fracture, backlight unit's bending property has further been promoted.
Further, in some alternative embodiments, the first shape is a rectangle; the combined rubber frame comprises a first edge close to the light source and a second edge arranged opposite to the first edge; a plurality of notches are arranged on the first edge or the second edge, or a plurality of notches are arranged on the first edge and the second edge, and the depth of each notch is smaller than the height of the first edge and/or the second edge in the direction vertical to the plane of the combined light guide plate; the position of the notch corresponds to the area between the adjacent light guide plate monomers. A plurality of notches are arranged on the first edge and/or the second edge of the combined rubber frame in a punching mode, so that the bending performance of the combined rubber frame is further improved, and the backlight assembly can meet the requirement of higher curvature.
Specifically, fig. 19a is a schematic cross-sectional view of the assembled rubber frame in fig. 18 at a position of a tangent line Q3 of the first side 6091, and fig. 19b is a schematic cross-sectional view of the assembled rubber frame in fig. 18 at a position of a tangent line Q4 of the second side 6092, as shown in fig. 19a and 19b, a plurality of notches 610 are disposed on both the first side 6091 and the second side 6092 of the assembled rubber frame, and the positions of the notches 610 correspond to regions between adjacent light guide plate monomers, where the first side 6091 of the assembled rubber frame is formed by overlapping one side of the first rubber frame 11 and one side of the second rubber frame 12, and the second side 6092 of the assembled rubber frame is one side of the first rubber frame 11.
Further, in some alternative embodiments, the backlight assembly further includes: the combined rubber frame is made of a polyester film; the combined rubber frame comprises a third rubber frame and a fourth rubber frame, two end parts of the third rubber frame and two end parts of the fourth rubber frame are respectively attached to form a closed first shape, and the thickness of the third rubber frame is larger than that of the fourth rubber frame; the combined light guide plate and the light source are arranged in the combined rubber frame, and the light source is positioned at the fourth rubber frame.
In this embodiment, the shape of the composite plastic frame is not limited, and may be circular, oval or rectangular, wherein the first shape is rectangular, and referring to fig. 20, fig. 21a and fig. 21b, a specific composite plastic frame is shown in fig. 20 in a top view, the composite plastic frame 609 includes a third plastic frame 13 and a fourth plastic frame 14, two end portions of the third plastic frame 13 and two end portions of the fourth plastic frame 14 are respectively bonded to form a closed rectangle, and the thickness of the third plastic frame 13 is greater than that of the fourth plastic frame 14.
In this embodiment provides backlight unit, the combination light guide plate has better bending property as a whole, can realize the curved surface through the free subregion of light guide plate and show, and flexible film and tie coat can thin the subregion limit, backlight unit and curved surface screen match the back, can promote the display effect of curved surface screen, and simultaneously, still include the combination frame of gluing that the frame laminating is constituteed by the third in the backlight unit that this embodiment provided, and the adoption of combination frame material has flexible polyester film, it is flexible to have, difficult fracture, backlight unit's bending property has further been promoted.
Further, the first shape is a rectangle; the combined rubber frame comprises a first edge close to the light source and a second edge arranged opposite to the first edge; a plurality of notches are arranged on the first edge or the second edge, or a plurality of notches are arranged on the first edge and the second edge, and the depth of each notch is smaller than the height of the first edge and/or the second edge in the direction vertical to the plane of the combined light guide plate; the position of the notch corresponds to the area between the adjacent light guide plate monomers. A plurality of notches are arranged on the first edge and/or the second edge of the combined rubber frame in a punching mode, so that the bending performance of the combined rubber frame is further improved, and the backlight assembly can meet the requirement of higher curvature.
Specifically, fig. 21a is a schematic cross-sectional view of a first side 6091 of the composite adhesive frame 609 at a position of a tangent line Q5, and fig. 21b is a schematic cross-sectional view of a second side 6092 of the composite adhesive frame 609 at a position of a tangent line Q6, as shown in fig. 21a and 21b, a plurality of notches 610 are provided on both the first side 6091 and the second side 6092 of the composite adhesive frame, the positions of the notches 610 correspond to regions between adjacent single light guide plates, wherein the first side 6091 of the composite adhesive frame 609 is formed by one side of the fourth adhesive frame 14, and the second side 6092 of the composite adhesive frame 609 is formed by one side of the third adhesive frame 13.
Further, in some alternative embodiments, as shown in fig. 19a, 19b, 21a, and 21b, the thickness D of each of the first side 6091 and the second side 6092 at the location of the cut is greater than or equal to 0.1 mm. After the combined rubber frame is subjected to the punching process, the thickness of 0.1mm is at least reserved, the bending performance of the combined rubber frame is improved, and meanwhile, the durability of the combined rubber frame in use is ensured.
An embodiment of the present invention further provides a display panel including the backlight assembly according to any one of the above embodiments. The backlight assembly of the display panel provided by the embodiment comprises the combined light guide plate, the light source and the combined rubber frame, wherein the combined light guide plate has better bending performance as a whole, the combined rubber frame is made of a flexible polyester film, has flexibility and is not easy to break, and the bending performance of the backlight assembly is further improved.
By the embodiment, the combined light guide plate, the backlight assembly and the display panel of the invention have the following beneficial effects:
the combined light guide plate comprises a plurality of light guide plate monomers which are sequentially arranged along a first direction, wherein the light guide plate monomers are fixed through a flexible film and an adhesive layer to form the combined light guide plate; meanwhile, the first end face and/or the second end face of each light guide plate monomer are/is provided with the reflecting layer, so that the light path in each light guide plate monomer is independent, and for the combined light guide plate, the light path of the combined light guide plate has a partition function, so that when the combined light guide plate is bent along the first direction, light rays in each area, namely the light guide plate monomer, are reflected in the combined light guide plate and then are emitted from the emergent face, and the curved surface display performance of the combined light guide plate is realized; and thirdly, the flexible film and the bonding layer in the combined light guide plate are both tiled in the arrangement direction of the light guide plate monomers, so that the partition boundary between the light guide plate monomers can be lightened, and the influence of the partition boundary of the combined light guide plate on the display effect can be better improved. The combined light guide plate provided by the invention has better bending performance as a whole, curved surface display can be realized through the partition of the light guide plate monomer, and the partition boundary can be lightened by the flexible film and the bonding layer, so that the display effect of the curved surface screen can be improved after the combined light guide plate provided by the invention is matched with the curved surface screen.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (6)
1. A backlight assembly, comprising:
an assembled light guide plate, wherein the assembled light guide plate comprises:
a flexible film;
the adhesive layer is arranged on the flexible film;
the light guide plate single bodies are sequentially arranged along a first direction, each light guide plate single body is provided with a first end face and a second end face which are oppositely arranged in the first direction, and a first side face which is respectively connected with the first end face and the second end face, and the first side face of each light guide plate single body is bonded with the bonding layer; and
the reflecting layer is arranged on the first end face and/or the second end face of the light guide plate monomer;
the light guide plate is characterized by further comprising a boundary line desalting layer, wherein the boundary line desalting layer is arranged between the light guide plate monomers and the flexible thin film, the boundary line desalting layer and the bonding layer are integrated into a layer, the boundary line desalting layer is doped with diffusion particles, and the diffusion particles are located in the bonding layer and correspond to the boundary area between the light guide plate monomers;
the combined light guide plate is provided with a third end face and a fourth end face which are oppositely arranged in a second direction, and the second direction is perpendicular to the first direction and is parallel to the first side face of the light guide plate monomer; on the section parallel to the first direction, the combined light guide plate is in a bent state; and
a light source, wherein the light source is positioned at one side of the third end surface of the combined light guide plate;
the backlight assembly further includes: the combined rubber frame is made of a polyester film;
the combined rubber frame comprises a first rubber frame and a second rubber frame, the first rubber frame is in a closed first shape, the second rubber frame is in the first shape with an opening, and the first rubber frame and the second rubber frame are overlapped and bonded;
the combined light guide plate and the light source are arranged in the combined rubber frame, and the light source is positioned at the opening of the second rubber frame;
the first shape is a rectangle; the combined rubber frame comprises a first edge close to the light source and a second edge opposite to the first edge; a plurality of notches are arranged on the first edge and/or the second edge, and the depth of each notch is smaller than the height of the first edge and/or the second edge in the direction perpendicular to the plane of the combined light guide plate; the positions of the notches correspond to the areas between the adjacent light guide plate monomers.
2. The backlight assembly of claim 1,
the light source comprises a plurality of LED lamps;
the light guide plate monomer is arranged corresponding to one or more LED lamps.
3. The backlight assembly of claim 2, wherein the light guide plate unit is disposed corresponding to a plurality of LED lamps, and the number of LED lamps corresponding to each light guide plate unit is the same.
4. The backlight assembly of claim 1,
the light source is an integrated LED lamp strip, the integrated LED lamp strip comprises an LED lamp, and the light emitting surface of the LED lamp faces the third end face of the combined light guide plate.
5. The backlight assembly of claim 1,
the thickness of the first edge and the second edge at the position of the cut is larger than or equal to 0.1 mm.
6. A display panel comprising the backlight assembly of any one of claims 1 to 5.
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