CN114253026B - Backlight module, display screen and spliced screen - Google Patents
Backlight module, display screen and spliced screen Download PDFInfo
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- CN114253026B CN114253026B CN202011007958.5A CN202011007958A CN114253026B CN 114253026 B CN114253026 B CN 114253026B CN 202011007958 A CN202011007958 A CN 202011007958A CN 114253026 B CN114253026 B CN 114253026B
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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
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The disclosure provides a backlight module, a display screen and a spliced screen, belongs to the technical field of display, and can solve the technical problem that an edge area in an existing display screen is dark. The backlight module of the present disclosure has a central region and an edge region surrounding the central region, comprising: the light guide device comprises a middle frame, an optical film layer and a light guide component; the middle frame comprises a bottom and a side part surrounding the bottom and connected with the bottom; the optical film layer is positioned in the middle frame and arranged on the bottom; the light guide component is arranged on the bottom, and at least part of the structure of the light guide component is positioned between the side part and the optical film layer and is used for gathering the light irradiated to the light guide component through the optical film layer towards the central area.
Description
Technical Field
The disclosure belongs to the technical field of display, and particularly relates to a backlight module, a display screen and a spliced screen.
Background
In order to improve the display area of the display product, the spliced screen display product gradually enters the field of vision of people. In the display screen of the spliced screen display product, light rays emitted by a backlight source of the backlight module can be incident on the edge of the display panel and emitted, and due to the shielding of a middle frame in the backlight module, the light rays are emitted at a large angle (non-vertical emission), and when the display panel is seen in front, no sufficient quantity of light rays are emitted into human eyes, so that the peripheral area of the display screen is easy to darken. 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 buckling deformation, the existence of the gap can lead to the loss of light which originally enters the display panel through the diffusion plate and the optical film layer, the edge of the display panel is aggravated to be darkened, the periphery of the display screen is easy to darken, and therefore, the bad peripheral black frame appears, and the display effect is influenced.
Disclosure of Invention
The disclosure aims to at least solve one of the technical problems in the prior art and provides a backlight module, a display screen and a spliced screen.
In a first aspect, embodiments of the present disclosure provide a backlight module having a central region and an edge region surrounding the central region, including: the light guide device comprises a middle frame, an optical film layer and a light guide component;
the middle frame comprises a bottom and a side part surrounding the bottom and connected with the bottom;
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 light guide assembly is arranged between the side part and the optical film layer and used for gathering the light rays irradiated to the light guide assembly through the optical film layer towards the central area.
Optionally, the light guide assembly includes: a connection part and a light guide part connected with the connection part;
the connecting part is attached to one side of the side part, which is close to the optical film layer; the light guide part is attached to one side of the side part far away from the bottom, and the orthographic projection of the light guide part on the bottom at least covers the orthographic projection of part of the optical film layer on the bottom.
Optionally, a microstructure is disposed on a side of the light guiding portion away from the optical film layer.
Optionally, the microstructure includes prisms arranged in an array.
Optionally, the light guide assembly further includes: a chamfering part;
the chamfer part is positioned at an included angle between one side of the connecting part, which is close to the optical film layer, and one side of the light guide part, which is close to the optical film layer.
Optionally, the connecting portion, the light guiding portion and the chamfer portion are an integrally formed structure.
Optionally, the width of the light guide portion is greater than or equal to the sum of the widths of the bottom portion and the side portion.
Optionally, the connecting part and the side part are connected through a first adhesive layer;
the material of the first adhesive layer includes: double sided adhesive tape or liquid adhesive.
Optionally, the optical film layer includes a diffusion plate, a lower prism sheet, an upper prism sheet, and a diffusion sheet sequentially disposed in a direction away from the bottom.
In a second aspect, an embodiment of the present disclosure provides a display screen, including a backlight module provided as described above.
Optionally, the display screen further includes a display panel disposed opposite to 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 far away from the optical film layer.
Optionally, the material of the second adhesive layer includes an optical adhesive.
Optionally, the display screen further includes: 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 screen including a plurality of display screens as provided above.
Drawings
FIG. 1 is a schematic 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 according to an embodiment of the 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 according to an embodiment of the disclosure.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.
Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms 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 elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Fig. 1 is a schematic structural diagram of a display screen in the related art, as shown in fig. 1, the display screen includes a backlight module and a display screen which are oppositely arranged, 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 is transmitted and irradiated onto a color film substrate of the display panel to form light rays with different colors, thereby realizing multicolor display. In the central area, the light emitted by the backlight source can be incident into the display panel in a vertical direction, and when the display panel is seen in front view, the light with stronger brightness can be incident into human eyes. In the edge area, due to the shielding of the middle frame of the backlight module, the light emitted by the backlight source usually exits at a large angle (non-perpendicular exit), and when the display panel is seen in front, no sufficient light is emitted into human eyes. In this way, 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 buckling deformation, the existence of the gap can lead to the loss of light which originally enters the display panel through the diffusion plate and the optical film layer, the edge of the display panel is aggravated to be darkened, the periphery of the display screen is easy to darken, and therefore, the bad peripheral black frame appears, and the display effect is influenced. 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 spliced screen. The backlight module, the display screen and the spliced screen provided by the present disclosure are described in further detail below with reference to the accompanying drawings and detailed description.
Example 1
Fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present 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 includes a bottom 1011, and a side 1012 surrounding the bottom 1011 and connected to the bottom 1011; the optical film layer 102 is located in the middle frame 101 and is disposed on the bottom 1011; the light guide element 103 is disposed on the bottom 1011, and at least a part of the light guide element 103 is disposed between the side 1012 and the optical film 102, so as to collect the light irradiated to the light guide element 103 through the optical film 102 toward the central area.
It should be noted that, in practical application, the heights of the connection 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 connection portion 1012 and the light guide assembly 103 have a good supporting effect on the display panel opposite to the backlight module when the display panel is applied to the display screen. The bottom 1011 and the connecting part 1012 of the middle frame 101 may be made of a harder metal material, such as aluminum, iron or an alloy of aluminum and iron, or other harder non-metal materials may be selected. The light guide member 103 may be made of at least one of polycarbonate, polymethyl methacrylate, or glass material.
In the backlight module provided in the embodiment of the disclosure, at least a part of the structure of the light guide assembly 103 is located between the side 1012 of the middle frame 101 and the optical film layer 102, when light is incident (non-perpendicularly incident) to the light guide assembly 103 through the optical film layer 102 at a large angle and exits from the light exit surface of the light guide assembly 103, due to refraction and reflection effects of the light guide assembly 103, the light can be deflected towards the normal direction of the light exit surface thereof, i.e. the light is folded from the edge region to the central region, and the light path diagram thereof can be as shown in fig. 2. When in front view, enough light can be ensured to enter human eyes so as to improve the brightness of the light in the edge area, so that the darkness of the edge area can be avoided, the defect of peripheral black frames can be avoided when the light source is applied to a display screen, the display brightness of a display picture can be uniform, and the display effect can be improved.
In some embodiments, as shown in fig. 2, the light guide assembly 103 includes: a connection portion 1031 and a light guide portion 1032 connected to the connection portion 1031; the connection portion 1031 is attached to one side of the side portion 1012 near the optical film layer 102; the light guide 1032 is attached to a side of the side 1012 away from the bottom 1011, and the front projection of the light guide 1032 on the bottom 1011 covers at least a portion of the front projection of the optical film 102 on the bottom 1011.
The connection portion 1031 and the light guide portion 1032 of the light guide assembly 103 may be connected to each other, wherein the connection portion 1031 is attached to a side portion 1012 near the optical film layer 102, and the side portion may form a fixed support for the connection portion 1031. The light guide 1032 is attached to the side portion 1012 away from the bottom 1011, so that the side portion can also provide a fixed support for the light guide 1032. And the front projection of the light guiding portion 1032 on the bottom 1011 covers at least a portion of the front projection of the optical film 102 on the bottom 1011, that is, the light guiding portion 1032 covers at least a portion of the optical film 102, so that the connection portion 1031 of the light guiding component 103 and the light guiding portion 1032 can form a T-shaped structure, so that the light emitted from the optical film 102 at a large angle completely passes through the light guiding portion 1032 and then exits, and the light path diagram thereof is shown in fig. 2. It can be seen that the light is emitted from the light guide portion 1032 of the light guide assembly 103 and deflected towards the normal direction of the light emitting surface, that is, the light is folded towards the central area, so that the brightness of the light in the edge area can be obviously improved, the darkness of the edge area can be avoided, the defect of the peripheral black frame can be avoided when the light guide assembly is applied to a display screen, the display brightness of the display screen can be uniform, and the display effect can be improved.
In some embodiments, as shown in fig. 3, the light guide 1032 is provided with microstructures 104 on a side thereof remote from the optical film layer 102.
Note that, the microstructure 104 may further collect and concentrate the light passing through the light guide 1032 toward the central area, so that the brightness of the light passing through the light guide 1032 and the microstructure 104 is further improved, and the light path diagram thereof 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 emitting surface may be triangular, semicircular, arc-shaped, trapezoid-shaped, and the like. In the embodiments of the present disclosure, a prism having a triangular cross section is described as an example. It will be appreciated that the microstructure may also be a lens structure or other structure that can achieve light converging effects. The material of the microstructures 104 may be the same material as the light guiding portions 1032, or a different material. In practical applications, the side of the light guide 1032 away from the optical film 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 chamfer portion 1033; the chamfer portion 1033 is located at an angle between a side of the connecting portion 1031 near the optical film layer 102 and a side of the light guiding portion 1032 near the optical film layer 102.
Note that, the chamfer portion 1033 is located at an angle between the side of the connecting portion 1031 near the optical film layer 102 and the side of the light guiding portion 1032 near the optical film layer 102, and the light path diagram thereof is shown in fig. 4. The chamfer portion 1033 can guide more light into the light guide portion 1032 and emit the light at the edge region, thereby further improving the brightness of the light at the edge region and avoiding darkening of the edge region.
In some embodiments, the connection portion 1031, the light guide portion 1032, and the chamfer portion 1033 are an integrally formed structure.
In practical applications, the connecting portion 1031, the light guiding portion 1032, and the chamfer portion 1033 may be made of the same material and manufactured by a single process, for example, a cutting process, an injection molding process, or an extrusion process.
In some embodiments, the width of the light guide 1032 is greater than or equal to the sum of the widths of the bottom 1011 and side 1012.
It should be noted that, the width of the light guiding portion 1032 is greater than or equal to the sum of the widths of the bottom 1011 and the side 1012, and since the light guiding portion 1032 has a good light guiding effect, the light emitted from the optical film 102 at a large angle can completely pass through the light guiding portion 1032 and then be emitted, and the light in this area is collected toward the central line area. When the display panel is applied to a display screen, the positions of the corresponding edge areas of the display panel can be displayed in the same way, so that the defect of a black frame can be avoided, and meanwhile, the size of the frame of the display screen can be reduced. It can be understood that, in the light guide portion 1032, a light shielding tape may be attached to other sides except for the light incident surface and the light emergent surface, so as to prevent light leakage caused by leakage from other sides, thereby affecting the display effect of the display product formed by the light guide portion.
In some embodiments, the connection 1031 is connected to the side 1012 by a first adhesive layer; the material of the first adhesive layer includes: double sided adhesive tape or liquid adhesive.
The first adhesive layer (not shown) may fix and attach the connection portion 1031 to one side of the side portion 1012 of the middle frame 101, thereby fixedly supporting the connection portion 1031 and the light guide portion 1032 of the light guide assembly 103. The material of the first bonding layer can be double-sided adhesive or liquid adhesive, etc., so as to ensure that the first bonding layer has good light transmission performance and prevent the first bonding layer from shielding light. In practical application, the fixing structure may be further used to clamp the connection portion 1031 of the light guide assembly 103, so as to fix the connection portion 1031, avoid the use of the first adhesive layer, and make the fixing more reliable.
In some embodiments, the optical film layer 102 includes a diffusion plate, a lower prism sheet, an upper prism sheet, and a diffusion sheet sequentially disposed in a direction away from the bottom 1011.
It should be noted that, the diffusion plate, the lower prism sheet, the upper prism sheet and the diffusion sheet in the embodiments of the present disclosure have the same structure and function as the respective film layers in the related art, and may be prepared by using materials and processes in the related art, and the implementation principle thereof is not described herein. It is understood that the order of stacking the diffusion plate, the lower prism sheet, the upper prism sheet, and the diffusion sheet in the embodiments of the present disclosure may be appropriately adjusted, and the number of diffusion plates, lower prism sheets, upper prism sheets, and diffusion sheets in the embodiments of the present disclosure may also include a plurality, which 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 arranged between the backlight module and the display panel; the second adhesive layer covers one side of the light guide part far away from the optical film layer.
It should be noted that, the second adhesive layer may cover a side of the light guiding portion away from the optical film layer, so as to implement the box-alignment lamination between 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, and may increase a contact area with the second adhesive layer, so that an 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 be irradiated into the display panel, the display panel can be a liquid crystal display panel, the display panel comprises an array substrate and a color film substrate which are oppositely arranged, and a liquid crystal layer 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 is adjusted. The light rays can show different colors through the color film substrate, so that color display is realized. At least a portion of the light guiding component 103 is located between the side 1012 of the middle frame 101 and the optical film 102, when light is incident (non-perpendicular incident) to the light guiding component 103 through the optical film 102 at a large angle, and exits from the light emitting surface of the light guiding component 103 and irradiates to the display panel, the light can be deflected towards the normal direction of the light emitting surface due to the refraction and reflection of the light guiding component 103, i.e. the light is collected from the edge region to the central region. When the display panel is seen in front, enough 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, so that the darkness of the edge area can be avoided, the defect of peripheral black frames of the display screen can be avoided, the display brightness of a display picture can be uniform, and the display effect can be improved. In this embodiment of the disclosure, the material of the second adhesive layer is illustrated by taking thermosetting adhesive as an example, and in the preparation process, the thermosetting adhesive can be uniformly coated on the light guide portion 1032 of the light guide assembly 103 of the backlight module by using a dispenser, then the backlight module and the display panel are aligned and attached, and finally the backlight module and the display panel are heated, so that the second adhesive layer can 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, and 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 can be further provided with a reflecting structure such as a reflecting sheet and the like so as to reflect light rays emitted by the light emitting diode and enable the light rays to propagate towards the display panel.
Example III
The embodiment of the disclosure provides a spliced screen, this spliced screen includes a plurality of display screens that any embodiment provided above, in practical application, this spliced screen can be as the extremely narrow frame spliced screen of 0.88 millimeter that fig. 5 shows, also can be as the spliced screen that has the piece to be greater than or equal to 1.7 millimeter that fig. 6 shows, the splice screen that fig. 6 shows is different with the spliced screen that fig. 5 shows, the splice gap that fig. 6 shows 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, in this way, can not need set up foretell second tie coat and laminate display panel and backlight unit, in order to avoid the second tie coat to cause the shielding to light, improve the transmissivity of light. The implementation principle of the display screen is the same as that provided in the above embodiment, and will not be described in detail herein.
In the spliced screen provided by the embodiment of the disclosure, at least a part of the structure of the light guide assembly 103 in the backlight module is located between the side 1012 of the middle frame 101 and the optical film layer 102, when light is incident (non-perpendicular incident) to the light guide assembly 103 at a large angle through the optical film layer 102 and is emitted from the light emitting 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 towards the normal direction of the light emitting surface, i.e., the light is folded from the edge region to the central region. When the display panel is seen in front, enough 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, so that the darkness of the edge area can be avoided, the defect of peripheral black frames 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 employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (11)
1. A backlight module having a central region and an edge region surrounding the central region, comprising: the light guide device comprises a middle frame, an optical film layer and a light guide component;
the middle frame comprises a bottom and a side part surrounding the bottom and connected with the bottom;
the optical film layer is positioned in the middle frame and is arranged on the bottom;
the light guide component is arranged on the bottom, and at least part of the structure of the light guide component is positioned between the side part and the optical film layer and is used for gathering the light irradiated to the light guide component through the optical film layer towards the central area;
the light guide assembly includes: a connection part and a light guide part connected with the connection part; the connecting part and the light guide part form a T-shaped structure; the width of the light guide part is larger than or equal to the sum of the widths of the bottom part and the side part;
the connecting part is attached to one side of the side part, which is close to the optical film layer; the light guide part is attached to one side of the side part far away from the bottom, and the orthographic projection of the light guide part on the bottom at least covers the orthographic projection of part of the optical film layer on the bottom;
the light guide assembly further comprises: a chamfering part;
the chamfer part is positioned at an included angle between one side of the connecting part, which is close to the optical film layer, and one side of the light guide part, which is close to the optical film layer.
2. A backlight module according to claim 1, wherein a microstructure is provided on a side of the light guide portion away from the optical film layer.
3. A backlight module according to claim 2, wherein the microstructures comprise prisms arranged in an array.
4. A backlight module according to claim 1, wherein the connection portion, the light guide portion and the chamfer portion are integrally formed.
5. A backlight module according to claim 1, wherein the connection portion and the side portion are connected by a first adhesive layer;
the material of the first adhesive layer includes: double sided adhesive tape or liquid adhesive.
6. A backlight module according to claim 1, wherein the optical film layer comprises a diffusion plate, a lower prism sheet, an upper prism sheet and a diffusion sheet which are sequentially arranged in a direction away from the bottom.
7. A display screen comprising a backlight module according to any one of claims 1-6.
8. The display screen of claim 7, further comprising a display panel disposed opposite the backlight module, and a second adhesive layer between the backlight module and the display panel;
the second bonding layer covers one side of the light guide part far away from the optical film layer.
9. The display screen of claim 8, wherein the material of the second adhesive layer comprises an optical adhesive.
10. The display screen of claim 8, further comprising: the back plate is fixedly connected with the bottom, and the backlight source is arranged on the back plate.
11. A tiled screen comprising a plurality of display screens according to any of claims 7-10.
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| 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 |
| 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 |
| CN116224641A (en) * | 2023-02-28 | 2023-06-06 | 厦门天马微电子有限公司 | Display module and display device |
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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 |
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