CN114527599B - Backlight module and liquid crystal display device - Google Patents

Backlight module and liquid crystal display device Download PDF

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Publication number
CN114527599B
CN114527599B CN202210188619.4A CN202210188619A CN114527599B CN 114527599 B CN114527599 B CN 114527599B CN 202210188619 A CN202210188619 A CN 202210188619A CN 114527599 B CN114527599 B CN 114527599B
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China
Prior art keywords
dam structure
light
panel
lamp panel
lamp
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Active
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CN202210188619.4A
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Chinese (zh)
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CN114527599A (en
Inventor
杨勇
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to CN202210188619.4A priority Critical patent/CN114527599B/en
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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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—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
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The application provides a backlight module and a liquid crystal display device; this backlight unit includes backplate, lamp plate and optical diaphragm, and the lamp plate sets up in backplate one side, and the lamp plate includes first lamp plate and the second lamp plate of concatenation at least, and optical diaphragm sets up in the one side that the backplate was kept away from to the lamp plate, and wherein, the lamp plate includes light emitting chip, and backlight unit still includes the box dam structure, and at least part box dam structure sets up in the concatenation department of first lamp plate and second lamp plate, and the height of box dam structure is greater than light emitting chip's height, and the box dam structure is used for reflecting light. According to the application, the dam structure is arranged at the joint of the lamp panels, so that the height of the dam structure is larger than that of the light emitting chip, and the brightness of the joint is improved through the reflection of the dam structure on light rays, so that the problem that the brightness of the joint of the display device is different from that of other areas is solved.

Description

Backlight module and liquid crystal display device
Technical Field
The present application relates to the field of display technologies, and in particular, to a backlight module and a liquid crystal display device.
Background
The miniLED (mini light emitting diode) technology is widely used because of its advantages of high contrast, partition control, low power consumption, etc. can be achieved. In order to realize large-size display, the existing display device can form the display device by splicing a plurality of miniLED single boards, but in the splicing process of the miniLED single boards, as a light-emitting chip does not exist at the splicing part, and the size of a splice joint at the splicing part is uncontrollable, the problem that the splicing part is dark or bright is caused, and therefore the display device has the problem of uneven display during display.
Therefore, the existing spliced display device has the technical problem of uneven display caused by inconsistent brightness of the spliced part and brightness of other areas.
Disclosure of Invention
The embodiment of the application provides a backlight module and a liquid crystal display device, which are used for solving the technical problem of uneven display caused by inconsistent brightness of a spliced part and brightness of other areas of an existing spliced display device.
The embodiment of the application provides a backlight module, which comprises:
a back plate;
the lamp panel is arranged on one side of the backboard and at least comprises a first lamp panel and a second lamp panel which are spliced;
the optical diaphragm is arranged on one side of the lamp panel, which is far away from the backboard;
the light panel comprises a light emitting chip, the backlight module further comprises a surrounding dam structure, at least part of the surrounding dam structure is arranged at the joint of the first light panel and the second light panel, the height of the surrounding dam structure is larger than that of the light emitting chip, and the surrounding dam structure is used for reflecting light rays.
In some embodiments, the dam structure comprises a first dam structure and a second dam structure, the first lamp panel comprises a first dam structure, the second lamp panel comprises a second dam structure, the first dam structure is arranged at the joint of the first lamp panel and the second lamp panel, the second dam structure is arranged at the joint of the first lamp panel and the second lamp panel, and the first dam structure is combined with the second dam structure.
In some embodiments, the dam structure further includes a third dam structure disposed between the light emitting chips.
In some embodiments, the first and second weirs are equal in height, and the first weirs are greater in height than the third weirs.
In some embodiments, the first dam structure is formed with an arc surface at a side far from the splicing position, the second dam structure is formed with an arc surface at a side far from the splicing position, and a protrusion is formed at the top end of the first dam structure and the second dam structure after being combined.
In some embodiments, the dam structure includes a fourth dam structure disposed at the splice and filled into the splice joint between the first and second light panels, and a fifth dam structure disposed between the light emitting chips.
In some embodiments, the lamp panel includes a light emitting chip and a prismatic structure disposed on the light emitting chip.
In some embodiments, the height of the fourth dam structure is greater than or equal to the height of the fifth dam structure.
In some embodiments, the sum of twice the pitch of the light emitting chips closest to the splice and the centerline of the splice, and the width of the splice joint at the splice, is equal to the pitch between the light emitting chips farther from the splice.
Meanwhile, an embodiment of the present application provides a liquid crystal display device, including a liquid crystal display panel and a backlight module, where the backlight module includes:
a back plate;
the lamp panel is arranged on one side of the backboard and at least comprises a first lamp panel and a second lamp panel which are spliced;
the optical diaphragm is arranged on one side of the lamp panel, which is far away from the backboard;
the light panel comprises a light emitting chip, the backlight module further comprises a surrounding dam structure, at least part of the surrounding dam structure is arranged at the joint of the first light panel and the second light panel, the height of the surrounding dam structure is larger than that of the light emitting chip, and the surrounding dam structure is used for reflecting light rays.
The beneficial effects are that: the application provides a backlight module and a liquid crystal display device; this backlight unit includes backplate, lamp plate and optical diaphragm, and the lamp plate sets up in backplate one side, and the lamp plate includes first lamp plate and the second lamp plate of concatenation at least, and optical diaphragm sets up in the one side that the backplate was kept away from to the lamp plate, and wherein, the lamp plate includes light emitting chip, and backlight unit still includes the box dam structure, and at least part box dam structure sets up in the concatenation department of first lamp plate and second lamp plate, and the height of box dam structure is greater than light emitting chip's height, and the box dam structure is used for reflecting light. According to the application, the dam structure is arranged at the joint of the lamp panels, so that the height of the dam structure is larger than that of the light emitting chip, and the brightness of the joint is improved through the reflection of the dam structure on light rays, so that the problem that the brightness of the joint of the display device is different from that of other areas is solved.
Drawings
The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a first schematic diagram of a backlight module according to an embodiment of the application.
Fig. 2 is a second schematic diagram of a backlight module according to an embodiment of the application.
Fig. 3 is a schematic diagram of a liquid crystal display device according to an embodiment of the application.
Fig. 4 is a first schematic diagram of a backlight module at each stage corresponding to the method for manufacturing a backlight module in fig. 1.
Fig. 5 is a second schematic diagram of a backlight module at each stage corresponding to the method for manufacturing a backlight module in fig. 1.
Fig. 6 is a first schematic diagram of a backlight module at each stage corresponding to the method for manufacturing a backlight module in fig. 2.
Fig. 7 is a second schematic diagram of a backlight module at each stage corresponding to the method for manufacturing a backlight module in fig. 2.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.
The embodiment of the application provides a backlight module and a liquid crystal display device, aiming at the technical problem of uneven display caused by inconsistent brightness of a spliced part and brightness of other areas of the conventional spliced display device, and the backlight module and the liquid crystal display device are used for relieving the technical problem.
As shown in fig. 1, an embodiment of the present application provides a backlight module 1, which includes:
a back plate 11;
the lamp panel 12 is arranged on one side of the back plate 11, and the lamp panel 12 at least comprises a first lamp panel 121 and a second lamp panel 122 which are spliced;
an optical film 15 disposed on a side of the lamp panel 12 away from the back plate 11;
the lamp panel 12 includes a light emitting chip 121c, the backlight module 1 further includes a dam structure 13, at least a portion of the dam structure 13 is disposed at a joint of the first lamp panel 121 and the second lamp panel 122, and a height h2 of the dam structure 13 is greater than a height h1 of the light emitting chip 121c, and the dam structure 13 is configured to reflect light.
The embodiment of the application provides a backlight module, which is characterized in that a dam structure is arranged at the joint of lamp panels, so that the height of the dam structure is larger than that of a light emitting chip, and the brightness of the joint is improved through the reflection of the dam structure on light rays, thereby solving the problem that the brightness of the joint of a display device is different from the brightness of other areas.
When the height of the dam structure is inconsistent, the height of the dam structure is larger than the height of the light-emitting chip, namely the minimum height of the dam structure is larger than the height of the light-emitting chip; when the dam structure is arranged on the lamp panel and is filled at the edge joint, the height of the dam structure is determined by taking the substrate in the lamp panel as a reference plane, and when the heights of the dam structure are inconsistent, the height of the dam structure is greater than the height of the light emitting chip, and the minimum height of the dam structure is greater than the height of the light emitting chip.
In one embodiment, as shown in fig. 1, the dam structure 13 includes a first dam structure 131 and a second dam structure 132, the first lamp panel 121 includes a first dam structure 131, the second lamp panel 122 includes a second dam structure 132, the first dam structure 131 is disposed at a joint of the first lamp panel 121 and the second lamp panel 122, the second dam structure 132 is disposed at a joint of the first lamp panel 121 and the second lamp panel 122, and the first dam structure 131 is in butt joint with the second dam structure 132. Through set up first box dam structure and second box dam structure respectively on first lamp plate and second lamp plate for first box dam structure and second box dam structure can be involuted and form the box dam structure that is located the concatenation department, through the reflection of box dam structure to light, improve the luminance of the light of concatenation department, thereby improve the problem that the concatenation department of display device is dark.
Specifically, when setting up first surrounding dam structure and second surrounding dam structure, because first surrounding dam structure and second surrounding dam structure set up respectively on first lamp plate and second lamp plate, can exist the unable problem of contact of first surrounding dam structure and second surrounding dam structure, consequently can design first surrounding dam structure and second surrounding dam structure, make first surrounding dam structure and second surrounding dam structure extend outward to the lamp plate to make first surrounding dam structure and second surrounding dam structure can contact and involute.
Specifically, the first lamp panel comprises a first substrate, and the first dam structure is arranged beyond the first substrate; the second lamp panel comprises a second base plate, and the second dam structure is arranged beyond the second base plate.
Specifically, in response to the problem that excessive rigidity of the first and second dam structures may result in insufficient contact between the first and second dam structures, in one embodiment, the elastic modulus of the first and second dam structures is greater than the elastic modulus of the first substrate. Through making first box dam structure and second box dam structure have certain elasticity to provide certain extrusion force when first lamp plate and second lamp plate concatenation department, make first box dam structure and second box dam structure can closely combine in concatenation department, avoid first box dam structure and second box dam structure unable involution.
Specifically, when the back light module comprises a plurality of lamp panels, for example, when the first lamp panel is a lamp panel in a middle area or two sides or four sides of the first lamp panel are spliced with other lamp panels, the four sides of the first lamp panel are spliced with other lamp panels, at this time, the edges of the four sides of the first lamp panel are provided with the first surrounding dam structure, and correspondingly, the lamp panel spliced with the first lamp panel is also provided with the second surrounding dam structure, so that the first surrounding dam structure and the second surrounding dam structure are in butt joint; when the first light panel is a light panel in the edge area or the first light panel is spliced on one side only, the first light panel can be provided with a first dam structure only at the spliced position, and a normal design mode, such as a normal current or other dam structure, is adopted at the non-spliced position of the edge.
Specifically, for example, two sides of the first lamp panel are spliced with other lamp panels, so that one side of the first lamp panel is provided with a first box dam structure, and the other side of the first lamp panel is provided with a second box dam structure, so that the first lamp panel is spliced with other lamp panels at two sides; or the two sides of the first lamp panel are provided with first surrounding dam structures; or the two sides of the first lamp panel are provided with the second surrounding dam structures, so that the first lamp panel is spliced with other lamp panels at the two sides.
In one embodiment, the dam structure comprises a first dam structure and a second dam structure, the first lamp panel comprises a first dam structure, the second lamp panel comprises a second dam structure, the first dam structure is arranged at the joint of the first lamp panel and the second lamp panel, the second dam structure is arranged at the joint of the first lamp panel and the second lamp panel, and a gap exists between the first dam structure and the second dam structure. Because when first box dam structure and second box dam structure reflect light, can reflect through the side of first box dam structure and second box dam structure, also can reflect through the top surface of first box dam structure and second box dam structure, therefore, when there is the splice seam between first lamp plate and the second lamp plate, first box dam structure and second box dam structure also can have certain clearance, and first box dam structure and second box dam structure still can reflect light, improve the luminance of splice, improve splice display device and have the problem that splice is dark.
Aiming at the problem that part of light can diverge to the edge to cause light loss. In one embodiment, as shown in fig. 1, the surrounding dam structure 13 further includes a third surrounding dam structure 133, and the third surrounding dam structure 133 is disposed between the light emitting chips 121 c. Through setting up the third dam structure between the light emitting chip for the third dam structure can reflect the light of light emitting chip, thereby reduces the loss of light, improves the utilization ratio of light emitting chip.
In one embodiment, the first and second weirs are equal in height and the first weirs are greater in height than the third weirs. Through making the height of first box dam structure and second box dam structure equal, then first box dam structure and second box dam structure can be better involution, and through making the height of first box dam structure be greater than the height of second box dam structure for the box dam structure that is located the concatenation department can be better blocks light to adjacent light emitting chip or luminous region diffusion, improves the luminance of the concatenation department of display device.
The separate arrangement of the first and second weirs results in insufficient contact between the first and second weirs. In one embodiment, the first dam structure is formed with an arc surface at a side far from the splicing position, the second dam structure is formed with an arc surface at a side far from the splicing position, and a protrusion is formed at the top end of the second dam structure and the second dam structure after being combined.
Through with first box dam structure and second box dam structure form certain cambered surface in the one side of keeping away from concatenation department for when first box dam structure and second box dam structure extrude together, first box dam structure and second box dam structure can tend each other, improve the bonding effect of first box dam structure and second box dam structure. Through making the top of first box dam structure and second box dam structure be formed with the arch, make the arch can produce the receipts light effect to the reflection of light, as shown in fig. 1, can change the light of part wide-angle into the light of little angle even the forward view angle, improve the luminance of concatenation department to improve the concatenation dark line of the concatenation department of display device.
Specifically, as shown in fig. 1, it can be seen that the light ray 14 reflects when irradiated onto the dam structure 13, so as to avoid light loss caused by reflection of light rays with a large viewing angle, and in the area corresponding to the splicing seam 123, the light ray 14 can be converted into light rays with a small angle or even a front viewing angle when reflected onto the protrusion of the top end of the dam structure 13, so that the brightness of the splicing position is improved, and the splicing dark line of the splicing position of the display device is improved.
In an embodiment, the first and second box dam structures are symmetrically arranged about the splicing seam, and by arranging the first and second box dam structures symmetrically about the splicing seam, the first and second box dam structures can be well combined, so that the problem of dark joints of the display device is solved, and the problem of dark joints of the display device is solved.
In an embodiment, the light emitting chip comprises a large-aperture light type chip, and the large-aperture light type chip is adopted to enable light to be diffused to the surrounding dam structure, so that the light can be controlled at a certain angle, and the light is prevented from being diffused to a large visual angle to generate loss.
The problem that the effect of closing the box dam structure at the joint is poor due to the fact that the box dam structure is arranged on the two lamp panels respectively is solved. In one embodiment, as shown in fig. 2, the dam structure 13 includes a fourth dam structure 134 and a fifth dam structure 135, where the fourth dam structure 134 is disposed at the splice and fills the splice seam 123 between the first lamp panel 121 and the second lamp panel 122, and the fifth dam structure 135 is disposed between the light emitting chips 121 c. Through directly setting up the fourth dam structure in concatenation department, and the fourth dam structure is direct to be filled in the splice seam, need not to splice through the dam structure on with first lamp plate and the second lamp plate to avoid the relatively poor light loss that leads to of dam structure concatenation effect, and in the splice seam of first lamp plate and the second lamp plate that the fourth dam structure set up, can improve the concatenation effect of first lamp plate and second lamp plate, avoid appearing the separation between first lamp plate and the second lamp plate.
Specifically, the material of the surrounding dam structure comprises a rubber material, and the surrounding dam structure is formed by adopting the rubber material, so that the fourth surrounding dam structure can be used for bonding the first lamp panel and the second lamp panel, and the first lamp panel and the second lamp panel are prevented from being separated.
In one embodiment, as shown in fig. 2, the lamp panel 12 includes a light emitting chip 121c and a prism structure 123, and the prism structure 123 is disposed on the light emitting chip 121 c. According to the application, the prism structure is arranged on the light-emitting chip, so that the angle of light can be controlled through the prism structure, thereby improving the light intensity at the spliced part of the display panel, improving the light-emitting brightness of the display panel and improving the spliced dark line of the display device.
In one embodiment, the height of the fourth dam structure is greater than or equal to the height of the fifth dam structure. The height of the fourth dam is equal to that of the fifth dam structure, so that the optical performance of the spliced part is consistent with that of other areas, the spliced dark line of the spliced part of the display device is improved, and the display uniformity of the display device is good. The front brightness of the spliced position can be improved and the problem of darkness of the spliced position is solved by enabling the height of the fourth surrounding dam structure to be larger than that of the fifth surrounding dam structure.
In one embodiment, the sum of the distance L between the light emitting chips closest to the splice and the center line of the splice, and the width a of the splice joint at the splice, is equal to the distance L between the light emitting chips far from the splice, i.e. 2×l+a=l. The distance between the light emitting chips located on two sides of the spliced part is equal to the distance between the light emitting chips in other areas, and the distance between the light emitting chips on the lamp panel is equal to the distance between the light emitting chips on the lamp panel, so that the first lamp panel and the second lamp panel are two parts of the same lamp panel, and the angles of light rays in the areas and the intensity of the light rays are consistent through the arrangement of the surrounding dam structure, so that the problem that the spliced part of the display device is dark is solved, and meanwhile, the display uniformity of the display device is improved.
In one embodiment, the light emitting chip includes a first light emitting region, a second light emitting region, the third dam structure is disposed around the first light emitting region, and the third dam structure is disposed around the second light emitting region. When the dam structure is arranged in the area far away from the splicing part, the third dam structure can be arranged around the light-emitting chip through the partition, and the light in a certain light-emitting area is controlled.
In one embodiment, the reflectivity of the surrounding dam structure is greater than or equal to 95%, so that the loss of light is avoided, and the light utilization rate is improved.
Specifically, the above embodiment has been described in detail taking the example that the first and second dam structures are disposed at the splice to be matched and the fourth dam structure is directly disposed at the splice. When the multiple sides of the lamp panel are matched with other lamp panels, the brightness of the spliced position can be improved in a matching mode of the first surrounding dam structure and the second surrounding dam structure on one side of the lamp panel, and the brightness of the spliced position can be improved in a setting mode of the fourth surrounding dam structure on the other side of the lamp panel.
It should be noted that, in the embodiments of the present application, the first, second, third, fourth, and fifth are not specifically defined, and when the components are the same, the technical features in different embodiments may be combined, for example, the third surrounding dam structure and the fifth surrounding dam structure each refer to a surrounding dam structure far away from the splicing position, so, although the third surrounding dam structure and the fifth surrounding dam structure belong to different embodiments, when the features of the third surrounding dam structure are different from the features of the fifth surrounding dam structure, the features of the third surrounding dam structure may also be applied to the fifth surrounding dam structure, and for the same reason, other features and embodiments may also be combined to obtain better technical effects when there is no conflict, which is not described herein.
In one embodiment, as shown in fig. 1, the first lamp panel 121 includes a first substrate 121a, and the second lamp panel 122 includes a second substrate 121b.
In one embodiment, as shown in fig. 1, the optical film 15 includes a color conversion film 151, a dodging film 152, a diffusion sheet 153, and a prism sheet 154.
Meanwhile, as shown in fig. 3, an embodiment of the present application provides a liquid crystal display device, the liquid crystal display panel includes a liquid crystal display panel 31 and a backlight module, the backlight module includes:
a back plate 11;
the lamp panel 12 is arranged on one side of the back plate 11, and the lamp panel 12 at least comprises a first lamp panel 121 and a second lamp panel 122 which are spliced;
an optical film 15 disposed on a side of the lamp panel 12 away from the back plate 11;
the lamp panel 12 includes a light emitting chip 121c, the backlight module 1 further includes a dam structure 13, at least a portion of the dam structure 13 is disposed at a joint of the first lamp panel 121 and the second lamp panel 122, and a height h2 of the dam structure 13 is greater than a height h1 of the light emitting chip 121c, and the dam structure 13 is configured to reflect light.
The embodiment of the application provides a liquid crystal display device, which comprises a liquid crystal display panel and a backlight module, wherein the backlight module is provided with a surrounding dam structure at the joint of lamp panels, so that the height of the surrounding dam structure is larger than that of a light emitting chip, and the brightness of the joint is improved through the reflection of the surrounding dam structure on light rays, thereby solving the problem that the brightness of the joint of a display device is different from the brightness of other areas.
In one embodiment, as shown in fig. 3, the liquid crystal display panel 31 includes a third substrate 311, a fourth substrate 313, and a liquid crystal layer 312 disposed between the third substrate 311 and the fourth substrate 313.
In one embodiment, the third substrate is an array substrate, and the fourth substrate is a color film substrate; or the third substrate is a COA (color on array) substrate, and the color film layer is arranged on the array side.
Meanwhile, as shown in fig. 4 and 5, taking the backlight module in fig. 1 as an example, when the backlight module is formed, as shown in (a) in fig. 4, a substrate 41 is provided, then a lamp panel is formed on the substrate 41, the light emitting chips 121c are fixed, as shown in (b) in fig. 4, then a third surrounding dam structure 133 between the light emitting chips is formed, as shown in (a) in fig. 5, then a first surrounding dam structure 131 at the splice and a third surrounding dam structure 133 outside the light emitting chips are formed, and the substrate is removed, as shown in (b) in fig. 5, after the first lamp panel 121 and the second lamp panel 122 are obtained, the first lamp panels 121 and 122 are spliced, and an optical film is provided, so that the backlight module is obtained.
As shown in fig. 6 and 7, taking the backlight module in fig. 2 as an example, when the backlight module is formed, as shown in (a) in fig. 6, a substrate 41 is provided, then a lamp panel is formed on the substrate 41, a light emitting chip 121c is fixed, as shown in (b) in fig. 6, then a fifth dam structure 135 between the light emitting chips and a fifth dam structure 135 disposed outside the light emitting chip are formed, as shown in (a) in fig. 7, then the substrate is removed, and the first lamp panel 121 and the second lamp panel 122 are spliced, as shown in (b) in fig. 7, then a fourth dam structure 134 is formed at the splice, and an optical film is disposed, thereby obtaining the backlight module.
As can be seen from the above embodiments:
the application provides a backlight module and a liquid crystal display device; this backlight unit includes backplate, lamp plate and optical diaphragm, and the lamp plate sets up in backplate one side, and the lamp plate includes first lamp plate and the second lamp plate of concatenation at least, and optical diaphragm sets up in the one side that the backplate was kept away from to the lamp plate, and wherein, the lamp plate includes light emitting chip, and backlight unit still includes the box dam structure, and at least part box dam structure sets up in the concatenation department of first lamp plate and second lamp plate, and the height of box dam structure is greater than light emitting chip's height, and the box dam structure is used for reflecting light. According to the application, the dam structure is arranged at the joint of the lamp panels, so that the height of the dam structure is larger than that of the light emitting chip, and the brightness of the joint is improved through the reflection of the dam structure on light rays, so that the problem that the brightness of the joint of the display device is different from that of other areas is solved.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
The backlight module and the liquid crystal display device provided by the embodiment of the application are described in detail, and specific examples are applied to explain the principle and the implementation mode of the application, and the description of the above embodiments is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (6)

1. A backlight module, comprising:
a back plate;
the lamp panel is arranged on one side of the backboard and at least comprises a first lamp panel and a second lamp panel which are spliced;
the optical diaphragm is arranged on one side of the lamp panel, which is far away from the backboard;
the backlight module comprises a first lamp panel, a second lamp panel, a light-emitting chip, a back light module and a surrounding dam structure, wherein the lamp panel comprises the light-emitting chip, the back light module further comprises the surrounding dam structure, at least part of the surrounding dam structure is arranged at the joint of the first lamp panel and the second lamp panel, the height of the surrounding dam structure is larger than that of the light-emitting chip, and the surrounding dam structure is used for reflecting light rays; the first light panel comprises a first substrate, the second light panel comprises a second light panel, the first light panel is arranged at the joint of the first light panel and the second light panel, the second light panel is arranged at the joint of the first light panel and the second light panel, the first light panel is combined with the second light panel, the first light panel comprises a first substrate, and the first light panel is arranged beyond the first substrate; the second lamp panel comprises a second substrate, the second surrounding dam structure exceeds the second substrate, and the elastic modulus of the first surrounding dam structure and the elastic modulus of the second surrounding dam structure are both larger than the elastic modulus of the first substrate of the first lamp panel.
2. The backlight module of claim 1, wherein the dam structure further comprises a third dam structure disposed between the light emitting chips.
3. The backlight module of claim 2, wherein the first and second dam structures have a height equal to each other, and the first dam structure has a height greater than the third dam structure.
4. The backlight module of claim 1, wherein the first dam structure is formed with an arc surface on a side far from the splicing position, the second dam structure is formed with an arc surface on a side far from the splicing position, and a protrusion is formed on a top end of the first dam structure and the second dam structure after being combined.
5. The backlight module according to claim 1, wherein the lamp panel comprises a light emitting chip and a prism structure disposed on the light emitting chip.
6. A liquid crystal display device comprising a liquid crystal display panel and a backlight module according to any one of claims 1 to 5.
CN202210188619.4A 2022-02-28 2022-02-28 Backlight module and liquid crystal display device Active CN114527599B (en)

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