CN114253026A - Backlight module, display screen and spliced screen - Google Patents
Backlight module, display screen and spliced screen Download PDFInfo
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- CN114253026A CN114253026A CN202011007958.5A CN202011007958A CN114253026A CN 114253026 A CN114253026 A CN 114253026A CN 202011007958 A CN202011007958 A CN 202011007958A CN 114253026 A CN114253026 A CN 114253026A
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- light guide
- optical film
- film layer
- backlight module
- light
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
-
- 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
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
-
- 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
Abstract
The utility model provides a backlight unit, display screen and concatenation screen belongs to and shows technical field, and it can solve the technical problem that the marginal area in the current display screen is dark. The backlight module of the present disclosure has a central region and an edge region surrounding the central region, and includes: the light guide module comprises a middle frame, an optical film layer and a light guide component; the middle frame comprises a bottom part and a side part which surrounds the bottom part and is connected with the bottom part; the optical film layer is positioned in the middle frame and is arranged on the bottom; the light guide assembly is arranged on the bottom, and at least part of the structure of the light guide assembly is positioned between the side part and the optical film layer and used for gathering light irradiated to the light guide assembly through the optical film layer to the central area.
Description
Technical Field
The utility model belongs to the technical field of show, concretely relates to backlight unit, display screen and concatenation screen.
Background
In order to increase the display area of the display product, the spliced screen display product gradually enters the visual field of people. In the display screen of the spliced screen display product, light emitted by a backlight source of the backlight module can be incident to the edge of the display panel and is emitted, due to the shielding of a middle frame in the backlight module, the light is emitted at a large angle (non-vertical emission), when the display panel is looked at, no sufficient light is emitted into human eyes, and therefore the peripheral area of the display screen is easily darkened. In addition, because the expansion space is reserved between the diffusion plate and the middle frame, the high-temperature test diffusion plate is prevented from warping and deforming, light rays which enter the display panel through the diffusion plate and the optical film layer in a scattering mode are lost due to the existence of the gap, the edge of the display panel is darkened, the periphery of the display screen is darkened easily, and therefore the periphery of the display screen is poor in blackness, and the display effect is affected.
Disclosure of Invention
The present disclosure is directed to at least one of the technical problems in the prior art, and provides a backlight module, a display screen and a tiled display screen.
In a first aspect, an embodiment of the present disclosure provides a backlight module having a central area and an edge area surrounding the central area, including: the light guide module comprises a middle frame, an optical film layer and a light guide component;
the middle frame comprises a bottom part and a side part which surrounds the bottom part and is connected with the bottom part;
the optical film layer is positioned in the middle frame and is arranged on the bottom;
the light guide assembly is arranged on the bottom, and at least part of the structure of the light guide assembly is positioned between the side part and the optical film layer and used for gathering the light irradiated to the light guide assembly through the optical film layer to the central area.
Optionally, the light guide assembly comprises: a connecting part and a light guide part connected with the connecting part;
the connecting part is attached to one side of the side part close to the optical film layer; the light guide part is attached to one side of the side part, which is far away from the bottom part, and the orthographic projection of the light guide part on the bottom part at least covers part of the orthographic projection of the optical film layer on the bottom part.
Optionally, a side of the light guide part away from the optical film layer is provided with a microstructure.
Optionally, the microstructures comprise prisms arranged in an array.
Optionally, the light guide assembly further comprises: chamfering the corner;
the chamfered part is positioned at an included angle between one side of the connecting part close to the optical film layer and one side of the light guide part close to the optical film layer.
Alternatively, the connecting portion, the light guide portion, and the chamfered portion may be integrally formed.
Optionally, a width of the light guide part is greater than or equal to a sum of widths of the bottom part and the side part.
Optionally, the connecting part is connected with the side part through a first adhesive layer;
the material of the first bonding layer comprises: double-sided adhesive tape or liquid adhesive tape.
Optionally, the optical film layer includes a diffusion plate, a lower prism sheet, an upper prism sheet, and a diffusion sheet, which are sequentially disposed in a direction away from the bottom.
In a second aspect, an embodiment of the present disclosure provides a display screen, including the backlight module provided as above.
Optionally, the display screen further includes a display panel disposed opposite to the backlight module, and a second adhesive layer located between the backlight module and the display panel;
the second bonding layer covers one side of the light guide part, which is far away from the optical film layer.
Optionally, the material of the second adhesive layer comprises an optical glue.
Optionally, the display screen further comprises: the back plate is fixedly connected with the bottom, and the backlight source is arranged on the back plate.
In a third aspect, embodiments of the present disclosure provide a tiled display including a plurality of display screens as provided above.
Drawings
FIG. 1 is a schematic structural diagram of a display screen in the related art;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure;
fig. 3 is a schematic structural diagram of another backlight module provided in the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the disclosure;
fig. 5 is a schematic structural diagram of a spliced screen according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another spliced screen provided in the embodiment of the present disclosure.
Detailed Description
For a better understanding of the technical aspects of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1 is a schematic structural diagram of a display screen in the related art, and as shown in fig. 1, the display screen includes a backlight module and a display screen that are arranged oppositely, a backlight source in the backlight module is a direct-type backlight source, light emitted by the backlight source can be incident into a display panel, and liquid crystal molecules in a liquid crystal layer of the display panel deflect under the control of a driving voltage, so that the light penetrates through and irradiates a color film substrate of the display panel to form light of different colors, thereby realizing multicolor display. In the central area, light emitted from the backlight source can be incident into the display panel in the vertical direction, and when the display panel is viewed in the front view, light with stronger brightness can be incident into human eyes. In the edge region, due to the shielding of the middle frame of the backlight module, the light emitted by the backlight source generally exits at a large angle (non-vertical exit), and when the display panel is viewed frontally, no sufficient amount of light enters human eyes. Thus, the edge area of the display screen is easily darkened. In addition, because the expansion space is reserved between the diffusion plate and the middle frame, the high-temperature test diffusion plate is prevented from warping and deforming, light rays which enter the display panel through the diffusion plate and the optical film layer in a scattering mode are lost due to the existence of the gap, the edge of the display panel is darkened, the periphery of the display screen is darkened easily, and therefore the periphery of the display screen is poor in blackness, and the display effect is affected. In order to solve at least one of the above technical problems in the related art, the present disclosure provides a backlight module, a display screen and a tiled screen. The backlight module, the display screen and the tiled screen provided by the present disclosure are further described in detail with reference to the accompanying drawings and the detailed description.
Example one
Fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the disclosure, as shown in fig. 2, the backlight module has a central area and an edge area surrounding the central area, and includes: a middle frame 101, an optical film layer 102 and a light guide assembly 103; the middle frame 101 comprises a bottom 1011 and a side 1012 surrounding the bottom 1011 and connected with the bottom 1011; the optical film layer 102 is located in the middle frame 101 and disposed on the bottom 1011; the light guide assembly 103 is disposed on the bottom 1011, and at least a portion of the light guide assembly 103 is disposed between the side 1012 and the optical film 102, and is used for collecting light rays irradiated to the light guide assembly 103 through the optical film 102 to a central region.
It should be noted that, in practical applications, the heights of the connecting portion 1012 and the light guide assembly 103 are generally greater than the thickness of the optical film layer 102, so as to ensure that the connecting portion 1012 and the light guide assembly 103 have a good supporting effect on the display panel disposed opposite to the backlight module when the display panel is applied to a display screen. Both the bottom 1011 and the connecting portion 1012 of the middle frame 101 may be made of a hard metal material, such as aluminum, iron, or an alloy of aluminum and iron, but other hard non-metal materials may be selected. The light guide member 103 may be made of at least one of polycarbonate, polymethylmethacrylate, or a glass material.
In the backlight module provided by the embodiment of the present disclosure, at least a part of the structure of the light guiding assembly 103 is located between the side portion 1012 of the middle frame 101 and the optical film 102, when the light enters the light guiding assembly 103 through the optical film 102 at a large angle (non-vertical incidence) and exits from the light exit surface of the light guiding assembly 103, due to the refraction and reflection of the light guiding assembly 103, the light can be deflected toward the normal direction of the light exit surface, that is, the light is collected from the edge area to the center area, and the light path diagram thereof can be as shown in fig. 2. When the display screen is applied to the display screen, the poor surrounding black frame can be avoided, so that the display brightness of the display picture can be uniform, and the display effect can be improved.
In some embodiments, as shown in fig. 2, light guide assembly 103 comprises: a connection portion 1031 and a light guide portion 1032 connected to the connection portion 1031; the connecting part 1031 is attached to one side of the side part 1012 close to the optical film layer 102; the light guide portion 1032 is attached to a side of the side portion 1012 away from the bottom 1011, and an orthographic projection of the light guide portion 1032 on the bottom 1011 covers at least a part of an orthographic projection of the optical film layer 102 on the bottom 1011.
It should be noted that the connecting portion 1031 and the light guide portion 1032 in the light guide assembly 103 may be connected to each other, wherein the connecting portion 1031 is attached to the side portion 1012 close to the optical film layer 102, and the side portion may form a fixing support for the connecting portion 1031. The light guide portion 1032 is attached to the side portion 1012 on the side away from the bottom 1011, so that the side portion can also provide fixed support for the light guide portion 1032. And the orthographic projection of the light guide part 1032 on the bottom 1011 at least covers part of the orthographic projection of the optical film layer 102 on the bottom 1011, that is, the light guide part 1032 at least covers part of the optical film layer 102, so that the connecting part 1031 and the light guide part 1032 of the light guide assembly 103 can form a T-shaped structure, so that the light emitted from the optical film layer 102 at a large angle completely passes through the light guide part 1032 and then is emitted, and the optical path diagram is shown in fig. 2. It can be seen that the light emitted from the light guide portion 1032 of the light guide assembly 103 is deflected toward the normal direction of the light emitting surface, i.e., is collected toward the central region, so that the brightness of the light in the edge region can be significantly improved, the edge region is prevented from being darkened, and the occurrence of poor peripheral black frames can be avoided when the light guide assembly is applied to a display screen, so that the display brightness of the display image can be uniform, and the display effect can be improved.
In some embodiments, as shown in fig. 3, the side of the light guide portion 1032 remote from the optical film layer 102 is provided with microstructures 104.
Note that, the microstructures 104 can further converge and converge the light passing through the light guide portion 1032 toward the central region, so that the brightness of the light passing through the light guide portion 1032 and the microstructures 104 is further improved, and the light path diagram is shown in fig. 3. In practical applications, the microstructure 104 may be a plurality of prisms arranged in an array, and the cross section of each prism perpendicular to the light exit surface may be triangular, semicircular, arc-shaped, or trapezoidal. In the embodiments of the present disclosure, a prism having a triangular cross section is exemplified. It will be appreciated that the microstructures may also be lens structures or other structures that may achieve light converging effects. The material of microstructures 104 can be the same material as light directing portion 1032, or a different material. In practical applications, the side of the light guide portion 1032 remote from the optical film layer 102 may be patterned to form the microstructures 104 thereon.
In some embodiments, as shown in fig. 4, the light guide assembly 103 further comprises: a chamfered portion 1033; the chamfered portion 1033 is located at an angle between the side of the connecting portion 1031 close to the optical film layer 102 and the side of the light guide portion 1032 close to the optical film layer 102.
Note that the chamfered portion 1033 is located at an angle between the side of the connecting portion 1031 close to the optical film layer 102 and the side of the light guide portion 1032 close to the optical film layer 102, and the optical path diagram thereof is shown in fig. 4. The chamfered portion 1033 can guide more light into the light guide portion 1032 and emit the light to the edge area, thereby further improving the brightness of the light in the edge area and preventing the edge area from being darkened.
In some embodiments, connection portion 1031, light guide portion 1032, and chamfered portion 1033 are an integrally molded structure.
In practical applications, the connecting portion 1031, the light guide portion 1032 and the chamfered portion 1033 may be made of the same material by a single process, for example, a cutting process, an injection molding process or an extrusion process.
In some embodiments, the width of light directing portion 1032 is greater than or equal to the sum of the widths of bottom 1011 and side 1012.
It should be noted that the width of the light guide portion 1032 is greater than or equal to the sum of the widths of the bottom 1011 and the side 1012, and the light guide portion 1032 has a good light guiding effect, so that light rays emitted from the optical film layer 102 at a large angle completely pass through the light guide portion 1032 and then are emitted, and the light rays in the region are collected towards the central line region. When the display screen is applied, the position of the corresponding edge area of the display panel can be displayed in the same way, so that the defect of a black frame can be avoided, and the size of a frame of the display screen can be reduced. It can be understood that, in the light guide portion 1032, the light blocking tapes may be attached to other side surfaces except the light incident surface and the light emitting surface thereof, so as to prevent light from leaking out from other side surfaces to cause light leakage, which may affect the display effect of the display product formed thereby.
In some embodiments, the connection 1031 is connected to the side portion 1012 by a first adhesive layer; the material of the first adhesive layer includes: double-sided adhesive tape or liquid adhesive tape.
The first adhesive layer (not shown) may fix the connecting portion 1031 to one side of the side portion 1012 of the middle frame 101, so as to fixedly support the connecting portion 1031 and the light guide portion 1032 of the light guide member 103. The material of first tie coat can be double faced adhesive tape or liquid glue etc. to guarantee that it has good light transmission performance, prevent the sheltering from of first tie coat to light. In practical application, the connection portion 1031 of the light guide assembly 103 may be engaged by a fixing structure, so as to fix the connection portion 1031, avoid using the first adhesive layer, avoid disposing the first adhesive layer at a corresponding position, and make the fixation more reliable.
In some embodiments, the optical film layer 102 includes a diffuser plate, a lower prism sheet, an upper prism sheet, and a diffuser plate arranged in sequence in a direction away from the bottom 1011.
It should be noted that the diffuser plate, the lower prism sheet, the upper prism sheet, and the diffuser sheet in the embodiment of the present disclosure have the same structure and function as those of each film layer in the related art, and can be prepared by using materials and processes in the related art, and the implementation principle thereof is not described herein again. It is to be understood that the order of stacking the diffuser plate, the lower prism sheet, the upper prism sheet, and the diffusion sheet in the embodiments of the present disclosure may also be adjusted as appropriate, and the number of the diffuser plate, the lower prism sheet, the upper prism sheet, and the diffusion sheet in the embodiments of the present disclosure may also include a plurality, and is not limited herein.
Example two
The embodiment of the disclosure provides a display screen, which comprises the backlight module provided by any one of the embodiments, a display panel arranged opposite to the backlight module, and a second bonding layer positioned between the backlight module and the display panel; the second bonding layer covers one side of the light guide part, which is far away from the optical film layer.
It should be noted that the second adhesive layer can cover the side of the light guide portion away from the optical film layer, so as to implement the box-to-box bonding of the backlight module and the display panel. Specifically, the second adhesive layer may cover the microstructure 104, and the microstructure 104 may form an uneven surface, which may increase a contact area with the second adhesive layer, so that the adhesive strength of the second adhesive layer may be improved.
In the display screen provided by the embodiment of the disclosure, light provided by the backlight module can irradiate the display panel, the display panel can be a liquid crystal display panel, and the display panel comprises an array substrate, a color film substrate and a liquid crystal layer, wherein the array substrate and the color film substrate are arranged oppositely, the liquid crystal layer is positioned between the array substrate and the color film substrate, and the transmittance of the light can be controlled by controlling the deflection angle of liquid crystal molecules in the liquid crystal layer, so that the brightness of the light can be adjusted. The light can show different colors through the color film substrate, so that color display is realized. When light enters the light guide assembly 103 through the optical film 102 at a large angle (non-perpendicular incidence), and exits from the light exit surface of the light guide assembly 103 and irradiates the display panel, due to refraction and reflection of the light guide assembly 103, the light can be deflected toward the normal direction of the light exit surface, that is, the light is collected from the edge area to the central area. When the display panel is viewed frontally, sufficient light can be ensured to enter human eyes through the display panel so as to improve the brightness of the light in the edge area, therefore, the darkening of the edge area can be avoided, the bad surrounding black frame of the display screen can be avoided, the display brightness of a display picture can be uniform, and the display effect can be improved. The material of the second bonding layer may include an optical adhesive, for example, an ultraviolet curing adhesive or a thermal curing adhesive, in the embodiment of the present disclosure, the material of the second bonding layer is illustrated by taking the thermal curing adhesive as an example, in the preparation process, the thermal curing adhesive may be uniformly coated on the light guide portion 1032 of the light guide assembly 103 of the backlight module by using a dispenser, and then the backlight module and the display panel are aligned and attached to each other, and finally the backlight module and the display panel are heated, so that the second bonding layer may firmly bond the backlight module and the display panel to form the display screen.
In some embodiments, the display screen further comprises: a back plate fixedly connected with the bottom 1011, and a backlight source arranged on the back plate.
It should be noted that the back plate may be fixedly connected to the bottom 1011 of the middle frame 101 through screws, the backlight source is disposed on the back plate to provide a light source for the display panel, and the backlight source may be a plurality of light emitting diodes arranged in an array. The back plate may further be provided with a reflective structure such as a reflective sheet to reflect light emitted from the light emitting diode, so that the light travels toward the display panel.
EXAMPLE III
The embodiment of the present disclosure provides a spliced screen, this spliced screen includes a plurality of display screens as provided in any one of the above embodiments, in practical application, this spliced screen can be as the extremely narrow frame spliced screen of 0.88 millimeter shown in fig. 5, also can be as the spliced screen that has piece more than or equal to 1.7 millimeter shown in fig. 6, the difference of the spliced screen shown in fig. 6 and the spliced screen shown in fig. 5 lies in, the splicing gap of the spliced screen shown in fig. 6 is great, can be provided with bearing structure between the adjacent display panel, in order to support and splice display panel, display panel can inlay in the recess that bearing structure formed, thus, can needn't set up foretell second tie coat and come into contact with display panel and backlight unit, in order to avoid the second tie coat to cause the light and shelter from, improve the transmissivity of light. The implementation principle of the display screen is the same as that of the display screen provided by the above embodiment, and is not described herein again.
In the spliced screen provided by the embodiment of the present disclosure, at least a part of the structure of the light guide assembly 103 in the backlight module is located between the side portion 1012 of the middle frame 101 and the optical film 102, and when light enters the light guide assembly 103 through the optical film 102 at a large angle (non-vertical incidence), exits from the light exit surface of the light guide assembly 103 and irradiates to the display panel, due to the refraction and reflection effects of the light guide assembly 103, the light can be deflected toward the normal direction of the light exit surface, that is, the light is collected from the edge area to the central area. When the display panel is viewed frontally, sufficient light can be ensured to enter human eyes through the display panel so as to improve the brightness of the light in the edge area, therefore, the darkening of the edge area can be avoided, the bad surrounding black frame of the display screen can be avoided, the display brightness of a display picture can be uniform, and the display effect can be improved.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.
Claims (14)
1. A backlight module having a central region and an edge region surrounding the central region, comprising: the light guide module comprises a middle frame, an optical film layer and a light guide component;
the middle frame comprises a bottom part and a side part which surrounds the bottom part and is connected with the bottom part;
the optical film layer is positioned in the middle frame and is arranged on the bottom;
the light guide assembly is arranged on the bottom, and at least part of the structure of the light guide assembly is positioned between the side part and the optical film layer and used for gathering the light irradiated to the light guide assembly through the optical film layer to the central area.
2. A backlight module according to claim 1, wherein the light guide assembly comprises: a connecting part and a light guide part connected with the connecting part;
the connecting part is attached to one side of the side part close to the optical film layer; the light guide part is attached to one side of the side part, which is far away from the bottom part, and the orthographic projection of the light guide part on the bottom part at least covers part of the orthographic projection of the optical film layer on the bottom part.
3. The backlight module as claimed in claim 2, wherein the side of the light guide part away from the optical film layer is provided with microstructures.
4. A backlight module according to claim 3, wherein the microstructures comprise prisms arranged in an array.
5. A backlight module according to claim 2, wherein the light guide assembly further comprises: chamfering the corner;
the chamfered part is positioned at an included angle between one side of the connecting part close to the optical film layer and one side of the light guide part close to the optical film layer.
6. The backlight module as claimed in claim 5, wherein the connecting portion, the light guide portion and the chamfered portion are integrally formed.
7. A backlight module according to claim 2, wherein the width of the light guide part is greater than or equal to the sum of the widths of the bottom part and the side parts.
8. The backlight module according to claim 2, wherein the connecting portion is connected to the side portion via a first adhesive layer;
the material of the first bonding layer comprises: double-sided adhesive tape or liquid adhesive tape.
9. The backlight module as claimed in claim 1, wherein the optical film layer comprises a diffuser plate, a lower prism sheet, an upper prism sheet and a diffuser plate arranged in sequence in a direction away from the bottom.
10. A display screen comprising a backlight module according to any one of claims 1 to 9.
11. A display screen according to claim 10, wherein the display screen further comprises a display panel disposed opposite the backlight module, and a second adhesive layer disposed between the backlight module and the display panel;
the second bonding layer covers one side of the light guide part, which is far away from the optical film layer.
12. A display screen in accordance with claim 11, wherein the material of the second adhesive layer comprises an optical glue.
13. The display screen of claim 11, further comprising: the back plate is fixedly connected with the bottom, and the backlight source is arranged on the back plate.
14. A tiled screen comprising a plurality of display screens according to any of claims 10-13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011007958.5A CN114253026B (en) | 2020-09-23 | 2020-09-23 | Backlight module, display screen and spliced screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877265A (en) * | 2022-05-06 | 2022-08-09 | 佛山电器照明股份有限公司 | Laser lighting device and manufacturing method thereof |
| CN115113437A (en) * | 2022-08-03 | 2022-09-27 | 奇瑞汽车股份有限公司 | Vehicle-mounted display screen and vehicle |
| CN115128871A (en) * | 2022-08-30 | 2022-09-30 | 惠科股份有限公司 | Backlight module, brightness control method thereof and display device |
| CN115113437B (en) * | 2022-08-03 | 2024-05-14 | 奇瑞汽车股份有限公司 | Vehicle-mounted display screen and vehicle |
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| CN102588828A (en) * | 2012-01-05 | 2012-07-18 | 冠捷显示科技（厦门）有限公司 | Panel spliced type backlight module |
| KR20160059006A (en) * | 2014-11-17 | 2016-05-26 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display device having the same |
| CN209946590U (en) * | 2019-05-10 | 2020-01-14 | 北京京东方显示技术有限公司 | Display device, backlight module and spliced screen |
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| CN102588828A (en) * | 2012-01-05 | 2012-07-18 | 冠捷显示科技（厦门）有限公司 | Panel spliced type backlight module |
| KR20160059006A (en) * | 2014-11-17 | 2016-05-26 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display device having the same |
| CN209946590U (en) * | 2019-05-10 | 2020-01-14 | 北京京东方显示技术有限公司 | Display device, backlight module and spliced screen |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114877265A (en) * | 2022-05-06 | 2022-08-09 | 佛山电器照明股份有限公司 | Laser lighting device and manufacturing method thereof |
| CN114877265B (en) * | 2022-05-06 | 2024-01-23 | 佛山电器照明股份有限公司 | Laser lighting device and manufacturing method thereof |
| CN115113437A (en) * | 2022-08-03 | 2022-09-27 | 奇瑞汽车股份有限公司 | Vehicle-mounted display screen and vehicle |
| CN115113437B (en) * | 2022-08-03 | 2024-05-14 | 奇瑞汽车股份有限公司 | Vehicle-mounted display screen and vehicle |
| CN115128871A (en) * | 2022-08-30 | 2022-09-30 | 惠科股份有限公司 | Backlight module, brightness control method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114253026B (en) | 2023-09-05 |
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