WO2023116072A1 - 背光模组和显示装置 - Google Patents

背光模组和显示装置 Download PDF

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Publication number
WO2023116072A1
WO2023116072A1 PCT/CN2022/118352 CN2022118352W WO2023116072A1 WO 2023116072 A1 WO2023116072 A1 WO 2023116072A1 CN 2022118352 W CN2022118352 W CN 2022118352W WO 2023116072 A1 WO2023116072 A1 WO 2023116072A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
backlight module
lamp panel
light
Prior art date
Application number
PCT/CN2022/118352
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English (en)
French (fr)
Inventor
赵志龙
袁海江
Original Assignee
绵阳惠科光电科技有限公司
惠科股份有限公司
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Application filed by 绵阳惠科光电科技有限公司, 惠科股份有限公司 filed Critical 绵阳惠科光电科技有限公司
Publication of WO2023116072A1 publication Critical patent/WO2023116072A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0078—Side-by-side arrangements, e.g. for large area displays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a display device.
  • LCD Liquid Crystal Display, liquid crystal display
  • LED Light Emitting Diode, light-emitting diode
  • Mini LED backlight has obvious cost advantages in the medium and large size market, which is in line with the trend of large screen in the medium and high-end market.
  • Mini LED has better contrast and display effect, which meets the needs of high-end users.
  • the purpose of the present application is to provide a backlight module and a display device to improve the light uniformity of the backlight module.
  • the present application discloses a backlight module.
  • the backlight module includes a backplane and a plurality of lamp panel assemblies. There is a seam, the backlight module also includes at least one light guide plate and at least one side light source, the light guide plate is arranged at the seam, the side light source corresponds to the light guide plate, and is located on the light guide plate to provide light source for the light guide plate.
  • the present application discloses a backlight module, which includes a backplane and a plurality of lamp panel assemblies.
  • the plurality of lamp panel assemblies are arranged on the backplane, and there are seams between adjacent lamp panel assemblies.
  • At least one groove is provided on the back plate, and the backlight module also includes a reflector, a light guide plate, a side light source and a reflective layer, and the reflector is arranged corresponding to the groove and fixed on the bottom of the groove
  • the light guide plate is arranged at the seam, the light guide plate includes a main body and a stopper, the main body is arranged in the groove, fixed on the reflector, and located on the light board
  • the bottom of the component; the limiting part is arranged on the side of the main body away from the back plate, between the adjacent lamp panel components, and limits the position of the lamp panel components;
  • the light guide plate is convex font;
  • the side light source is located on the side of the light guide plate to provide a light source for the light guide plate,
  • the present application discloses a display device, the display device includes a backlight module, and a display panel corresponding to the backlight module, the backlight module provides a backlight source for the display panel;
  • the backlight module includes a back panel and a plurality of lamp panel assemblies, a plurality of the lamp panel assemblies are arranged on the back panel, and there are seams between adjacent lamp panel assemblies, and the backlight module further includes at least one light guide plate and At least one side light source, the light guide plate is arranged at the seam, the side light source corresponds to the light guide plate and is located on the side of the light guide plate, providing a light source for the light guide plate.
  • this application arranges light guide plates and side light sources at the joints of the light panel assembly, and the side light sources emit light.
  • the light from the light is injected from the side of the light guide plate, and after the light guide function of the light guide plate, it is emitted from the top of the light guide plate, making the joints glow, thereby solving the problem of dark lines in the joints.
  • the reflective sheet only reflects the light emitted by the light-emitting unit on the lamp board, and the light-emitting units are all on the side of the reflective sheet.
  • the light reflected back by the reflective sheet is also oblique, causing the light emitted from the joint to be very messy; while the light emitted by the light guide plate in this application can be emitted from the joint vertically, so that the light emitted from all parts of the joint is uniform. Evenly arranged, thereby improving the light emitting effect of the backlight module.
  • FIG. 1 is a first schematic cross-sectional view of a display device provided in the first embodiment of the present application
  • FIG. 2 is a second cross-sectional schematic view of the first display device provided in the first embodiment of the present application.
  • FIG. 3 is a second schematic cross-sectional view of a second display device provided in the first embodiment of the present application.
  • FIG. 4 is a schematic cross-sectional view of a display device provided in a second embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional view of a display device provided by a third embodiment of the present application.
  • Figure 1 is a first schematic cross-sectional view of a display device provided in the first embodiment of the present application
  • Figure 2 is a second schematic cross-sectional view of a display device provided in the first embodiment of the present application
  • the first schematic cross-sectional view is a cross-sectional view of the display device along the length direction of the joint
  • the second schematic cross-sectional view is a cross-sectional view of the display device along the width direction of the joint.
  • a display device 100 is disclosed.
  • the display device 100 includes a backlight module 200 and a display panel 400 corresponding to the backlight module 200.
  • the backlight module 200 is the The display panel 400 provides a backlight.
  • the backlight module 200 it includes a back panel 210 and a plurality of lamp panel assemblies 220. A plurality of the lamp panel assemblies 220 are arranged on the back panel 210, and there are The seam 230, the backlight module 200 also includes at least one light guide plate 240 and at least one side light source 250, the light guide plate 240 is arranged at the seam 230, the side light source 250 corresponds to the light guide plate 240 , and located on the side of the light guide plate 240 , providing a light source for the light guide plate 240 .
  • the side of the light guide plate 240 not only covers the end of the light guide plate 240, but also covers both sides of the light guide plate 240; the number of side light sources 250 can be the same as the number of the light guide plate 240, and the side light sources 250 correspond to the light guide plate 240 one by one.
  • the side light source 250 can be located only at the end of the light guide plate 240, or it can only be located on both sides of the light guide plate 240; the quantity of the side light source 250 can also be more than the quantity of the light guide plate 240.
  • One side light source 250 a plurality of side light sources 250 can be located at both ends of the light guide plate 240 at the same time, can be located at both sides of the light guide plate 240;
  • the backlight module 200 also includes structures such as the optical film 300 , which will not be listed here.
  • the present application arranges a light guide plate at the seam 230 of the lamp panel assembly 220 240 and the side light source 250, the light emitted by the side light source 250 enters from the side of the light guide plate 240, and after passing through the light guiding effect of the light guide plate 240, it is emitted from the top of the light guide plate 240, making the patchwork 230 emit light, thereby solving the patchwork 230 dark line problem.
  • the reflection sheet 270 just reflects the light emitted by the light-emitting unit 222 on the lamp panel 221, and the light-emitting units 222 are all on the side of the reflection sheet 270, the light emitted by the light-emitting unit 222 is all oblique.
  • the reflection sheet 270 As for the reflection sheet 270, the light reflected back by the reflection sheet 270 is also oblique, causing the light emitted from the patchwork 230 to be very messy; while the light emitted by the light guide plate 240 in this application can be emitted from the patchwork 230 vertically , so that the light emitted from all parts of the seam 230 is evenly arranged, thereby improving the light emitting effect of the backlight module 200 .
  • At least one groove 211 is provided on the backplane 210, and the groove 211 is stamped and formed by the backplane 210.
  • the light guide plate 240 and the side light source 250 When assembling the backlight module 200, put the light guide plate 240 and the side light source 250 into the groove.
  • the light guide plate 240 is pasted on the bottom of the groove 211, and the side light source 250 is glued on the side wall of the groove 211, so that the side of the side light source 250 that emits light faces the side of the light guide plate 240.
  • the side light source 250 can be a general LED lamp, and of course other types of light emitting structures can also be used.
  • the wiring mode and control mode of the side light source 250 it is enough to use the same method as the light emitting unit 222 in the lamp panel assembly 220, and both are connected to the same power supply and control chip, and the light emitting unit 222 in the lamp panel assembly 220 Also subject to the same drive, after the backlight module 200 is matched with the light guide plate 240 and the side light source 250, local dimming can still be performed at various places according to the display requirements, so that the display effect is better.
  • the side light source 250 is fixed on the back plate 210 through the heat-conducting glue 290, that is, on the side wall of the groove 211, so that when the side light source 250 heats up after working for a long time, the heat can be transferred to the back plate 210 through the heat-conducting glue 290
  • the backplane 210 is generally made of metal material, the heat dissipation effect is good, and the heat transferred to the backplane 210 can be dissipated in time, so as to prevent the side light source 250 from accumulating high heat and affecting the wiring and film near the side light source 250. layer.
  • the top of the side light source 250 is also provided with a small white reflector 291 as a reflective structure, which can reflect the light emitted by the side light source 250 onto the light guide plate 240 to improve light utilization;
  • a small white reflector 291 as a reflective structure, which can reflect the light emitted by the side light source 250 onto the light guide plate 240 to improve light utilization;
  • the top of the side light source 250 is covered with a small white reflector 291, so that the light emitted by the side light source 250 can only be emitted through the light guide plate 240, so that it will not be irradiated from other places, and will not cause light leakage.
  • the light output effect in the lamp panel assembly 220 will not be affected.
  • a reflective sheet 270 can be further arranged, and the reflective sheet 270 can be fixed on the bottom of the groove 211. Specifically, it can be pasted on the back plate 210 by using 0.05mm double-sided adhesive without base material. bottom; of course, the area of the reflection sheet 270 can also be increased, so that the reflection sheet 270 is not only the bottom of the light guide plate 240, but also the bottom of the side light source 250, so that the reflection effect is better; at this time, the light guide plate The orthographic projection of 240 and the orthographic projection of the side light source 250 overlap with the orthographic projection of the reflection sheet 270 .
  • the reflective sheet 270 can be bonded to the bottom of the groove 211 first, the side light source 250 can be bonded to the side wall of the groove 211, and then the light guide plate 240 can be bonded to the reflective sheet 270; Adjust the installation sequence according to the situation, which is not limited here.
  • the lamp panel assembly 220 Since the seam 230 between the lamp panel assemblies 220 is small, if the groove 211 is not provided on the back plate 210 and the light guide plate 240 is placed between two adjacent lamp panel assemblies 220, the lamp panel assembly 220 needs to be enlarged.
  • the size of the seam 230 between them, or dividing the light guide plate 240 into small sizes through complicated processes, will make the production process of the backlight module 200 more complicated; and it will also make the performance of the light guide plate 240 worse, because the light guide plate 240 The size cannot be too small.
  • the light guide plate 240 needs a certain width to ensure the amount of incident light, and the light guide plate 240 also needs a certain height to ensure that the angle of the incident light is guided into a vertical emitted light.
  • the width of the light guide plate 240 is not enough, the amount of incoming light will be too small, resulting in dimming of the light output brightness of the light guide plate 240; The light uniformity of 240 becomes worse. Therefore, in this embodiment, by adding a groove 211 to the back plate 210, the light guide plate 240 is placed in the groove 211 without occupying the area at the seam 230, so that the width of the light guide plate 240 can be greater than that of the seam 230. Width, the thickness of the light guide plate 240 can be greater than the thickness of the lamp panel assembly 220; in this way, the brightness and uniformity of the light output of the light guide plate 240 can meet the use requirements without changing the width of the original patchwork 230.
  • the backlight module 200 further includes a reflective layer 280 , and the reflective layer 280 is disposed on a side of the light guide plate 240 opposite to the lamp panel assembly 220 .
  • the reflective layer 280 is disposed on a side of the light guide plate 240 opposite to the lamp panel assembly 220 .
  • a reflective layer 280 is provided on the side of the light guide plate 240 opposite to the lamp panel assembly 220 to reflect the light blocked by the lamp panel assembly 220 back to the light guide plate 240 , and then pass through the bottom of the light guide plate 240 Due to the reflective effect of the reflective sheet 270, part of the light will be reflected to the patchwork 230 to improve light utilization efficiency. Moreover, it is also possible to further set the side of the light guide plate 240 opposite to the lamp panel assembly 220 as an inclined plane, and at this time, the corresponding reflective layer 280 is also inclined.
  • the The light reflected by the reflective layer 280 irradiates obliquely onto the reflective sheet 270 , so that more light converges on the corresponding slit 230 in the light guide plate 240 , thereby further improving light utilization efficiency.
  • the light guide plate 240 and the lamp panel assembly 220 are not connected, but only abut against each other, and the light guide plate 240 supports the edge of the lamp panel assembly 220 .
  • the lamp panel assembly 220 is heated and expanded, the lamp panel 221 in the lamp panel assembly 220 can extend toward the seam 230 without being restricted by the light guide plate 240, so that the lamp panel 221 in the lamp panel assembly 220 will not wrinkle , Cracking problem.
  • the middle light guide plate 240 also includes a part located at the seam 230.
  • the light guide plate 240 includes a main body part 241 and a limiting part 242, so The main body part 241 is arranged in the groove 211 and is located at the bottom of the lamp panel assembly 220; Between the lamp panel assemblies 220, the lamp panel assemblies 220 are limited.
  • the height of the area overlapping the seam 230 in the light guide plate 240 is larger, because the top of the area overlapping the seam 230 in the light guide plate 240 is the same as the top of the groove 211. flush, the height of the area overlapping the seam 230 in the light guide plate 240 does not exceed the depth of the groove 211; and now the area overlapping the seam 230 in the light guide plate 240 at least reaches between two adjacent lamp panel assemblies 220 , protruding from the top of the groove 211, so the height of the area overlapping with the seam 230 in the light guide plate 240 is greater, and the light guiding effect on the light will be better.
  • the cross section of the limiting portion 242 is the same as that of the joint 230 , both of which are rectangular strip structures, and are integrally formed with the main body 241 .
  • the length of the light guide plate 240 is equal to the length of the limiting portions 242, and at this time, the edges of the lamp panel assembly 220 are all aligned with each other.
  • the limit part 242 abuts to better limit the light panel assembly 220 ; and the heights of the corresponding seams 230 in all the light guide plates 240 are equal, so that the light emitting effects of all the light guide plates 240 on the back plate 210 are uniform.
  • the cross section of the light guide plate 240 is similar to a convex shape, and the limiting portion 242 is a part of the top of the convex shape.
  • the top of the limiting part 242 can be flush with the top of the lamp panel assembly 220, so that the light emitted from the light guide plate 240 can achieve the same light output effect as that of the lamp panel assembly 220; and at this time, the optical film 300 can be directly attached to the lamp On the plate assembly 220 and the limiting portion 242 , the bottom of the optical film 300 receives the same support effect, which can ensure the flatness of the optical film 300 .
  • the top of the limiting portion 242 can also be lower than the top of the lamp panel assembly 220 , or higher than the top of the lamp panel assembly 220 , which will not affect the limiting effect of the light guide plate 240 on the lamp panel assembly 220 .
  • FIG. 4 it is a schematic cross-sectional view of a display device provided by the third embodiment of the present application, that is, a schematic cross-sectional view of the display device 100 in the width direction of the patchwork 230.
  • the difference from the second embodiment is that this embodiment In addition to a portion of the limiting portion 242 located between adjacent lamp panel assemblies 220 , a part of the limiting portion 242 is located above the lamp panel assembly 220 .
  • the limiting portion 242 includes a first connecting portion 243 and a second connecting portion 244 , one end of the first connecting portion 243 is connected to the main body portion 241 , and the other end is connected to the second connecting portion 244 , and the width of the first connecting portion 243 is smaller than the width of the second connecting portion 244 and the width of the main body portion 241;
  • the unit 222 is arranged on the side of the lamp board 221 away from the back board 210; the height of the first connecting part 243 is greater than the thickness of the lamp board 221, and the end of the lamp board 221 is arranged on the main body Between the portion 241 and the second connecting portion 244 , it is located in the bayonet formed by the limiting portion 242 and the main body portion 241 .
  • the limiting part 242 in this embodiment has a better limiting effect on the lamp panel assembly 220, because the limiting part 242 and the main body part 241 form a bayonet, and the limiting part 242 not only protects from the lamp
  • the sides of the panel assembly 220 limit the lamp panel assembly 220 , and also limit the lamp panel assembly 220 from the top of the lamp panel assembly 220 .
  • the edge of the lamp panel 221 in the lamp panel assembly 220 is inserted into the bayonet of the limiting part 242, and no additional process or structure is required to fix the lamp panel assembly 220 and the back panel 210 to the together, thus making the assembly process of the entire backlight module 200 simpler and more efficient.
  • the optical film 300 is separated from the lamp panel assembly 220 through the second connecting portion 244, so that a gap is formed between the optical film 300 and the lamp panel assembly 220, and the light output of the light emitting unit 222 in the lamp panel assembly 220 is increased. distance, to improve the uniform effect of light output from the lamp panel assembly 220.
  • the size of the display panel 400 in the display device 100 is large, the requirements for the light emission of the lamp panel assembly 220 are higher. At this time, the technical solution in this embodiment is applied to large A size panel would work even better.
  • the cross-sections of the first connecting portion 243 and the second connecting portion 244 are square, and at this time, the cross-section of the limiting portion 242 is T-shaped; the cross-section of the second connecting portion 244 can also be If it is a semicircle, the cross-section of the limiting portion 242 is mushroom-shaped or mushroom-shaped at this time.
  • the cross-section of the second connecting portion 244 can also be in other shapes.
  • optical glue 260 can be filled in the bayonet formed between the limiting part 242 and the main body part 241 to fix the light guide plate 240 and the lamp panel assembly 220, and raise the lamp panel assembly 220. stability. Moreover, after the optical glue 260 is solidified, it will not only separate the light guide plate 240 from the light board 221, but also have a certain degree of elasticity. , but the light guide plate 240 will not be in direct contact with the lamp panel 221 , so that the deformation of the lamp panel 221 will not be affected, and the problem of wrinkling and cracking of the lamp panel 221 will not occur.
  • the optical glue 260 is coated on the three inner walls of the bayonet, that is, the second connecting portion 244 constitutes the first part of the bayonet. side, the first connecting portion 243 constitutes the second side of the bayonet socket, the main body portion 241 constitutes the third side of the bayonet socket, optical glue is coated on the first side, the second side and the third side
  • the lamp panel 221 will not be squeezed by the light guide plate 240 no matter whether it expands horizontally or vertically, which better solves the problem of thermal expansion and contraction of the lamp panel 221 .
  • inventive concept of the present application can form a lot of embodiments, but the space of the application documents is limited and cannot be listed one by one. Therefore, on the premise of not conflicting, the above-described embodiments or between each The technical features can be combined arbitrarily to form new embodiments, and the original technical effects will be enhanced after each embodiment or technical features are combined

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Abstract

一种背光模组(200)和显示装置(100)，背光模组(200)包括背板(210)和多个灯板组件(220)，多个灯板组件(220)设置在背板(210)上，且相邻灯板组件(220)之间存在拼缝(230)，背光模组(200)还包括至少一个导光板(240)和至少一个侧光源(250)，导光板(240)设置在拼缝(230)处，侧光源(250)与导光板(240)对应，且位于导光板(240)的侧面，为导光板(240)提供光源。

Description

背光模组和显示装置
本申请要求于2021年12月22日提交中国专利局，申请号为2021115806472，申请名称为“背光模组和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本本申请涉及显示技术领域，尤其涉及一种背光模组和显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术；
在显示面板中，显示市场一直围绕着几个热点发展，包含高色域、高对比度、高效率、轻薄、低成本和健康护眼等。以TV市场为例，LCD(Liquid Crystal Display，液晶显示器)通过LED(Light Emitting Diode，发光二极管)背光源实现了上述性能，尤其是Mini LED背光出现后，成为LCD抗衡OLED的下一代背光源热门选择。对比传统LED和OLED，Mini LED背光在中大尺寸市场具备明显的成本优势，符合中高端市场大屏幕化的趋势。配合局域调光控制技术，Mini LED有更好的对比度和显示效果，满足高端用户的使用需求。
目前，Mini LED背光多采用灯板拼接工艺，灯板拼缝处多有光损，容易出现暗线问题。
发明内容
本申请的目的是提供一种背光模组和显示装置，以提高背光模组的出光均匀性。
本申请公开了一种背光模组，所述背光模组包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背光模组还包括至少一个导光板和至少一个侧光源，所述导光板设置在所述拼缝处，所述侧光源与所述导光板对应，且位于所述导光板的侧面，为所述导光板提供光源。
本申请公开了一种背光模组，包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背板上设有至少一个凹槽，所述背光模组还包括反射片、导光板、侧光源和反光层，所述反射片与所述凹槽对应设置，固定在所述凹槽的底部；所述导光板设置在所述拼缝处，所述导光板包括主体部和限位部，所述主体部设置在所述凹槽内，固定在所述反射片上，且位于所述灯板组件的底部；所述限位部设置在所述主体部远离所述背板的一侧，位于相邻所述灯板组件之间，对所述灯板组件限位；所述导光板为凸字形；所述侧光源位于所述导光板的侧面，为所述导光板提供光源，所述侧光源通 过导热胶粘接在所述凹槽的侧壁；所述反光层设置在所述主体部中与所述灯板组件相对的一侧。
本申请公开了一种显示装置，所述显示装置包括背光模组，以及与所述背光模组对应的显示面板，所述背光模组为所述显示面板提供背光源；所述背光模组包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背光模组还包括至少一个导光板和至少一个侧光源，所述导光板设置在所述拼缝处，所述侧光源与所述导光板对应，且位于所述导光板的侧面，为所述导光板提供光源。
相对于通过在灯板组件的拼缝处设置反射片来解决显示时出现的拼缝暗线问题的方案来说，本申请通过在灯板组件的拼缝处设置导光板和侧光源，侧光源发出的光从导光板的侧面射入，经过导光板的导光作用后，从导光板的顶部射出，使得拼缝处发光，从而解决拼缝暗线的问题。而且由于目前的反射片方案中，反射片只是将灯板上发光单元发出的光反射出去，且发光单元都在反射片的侧边，发光单元发出的光都是斜着朝向反射片的，经过反射片反射回的光线也是倾斜的，导致从拼缝发出的光很杂乱；而本申请中导光板发出的光能够垂直地从拼缝处发射出，使得从拼缝各处发出的光都是均匀排列的，从而提高了背光模组的出光效果。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请第一实施例提供的一种显示装置的第一截面示意图；
图2是本申请第一实施例提供的第一种显示装置的第二截面示意图；
图3是本申请第一实施例提供的第二种显示装置的第二截面示意图；
图4是本申请第二实施例提供的一种显示装置的截面示意图；
图5是本申请第三实施例提供的一种显示装置的截面示意图。
具体实施方式
需要理解的是，这里所使用的术语、公开的具体结构和功能细节，仅仅是为了描述具体实施例，是代表性的，但是本申请可以通过许多替换形式来具体实现，不应被解释成仅受限于这里所阐述的实施例。
下面参考附图和可选的实施例对本申请作详细说明。
实施例一：
如图1和图2所示，图1是本申请第一实施例提供的一种显示装置的第一截面示意图，图2是本申请第一实施例提供的一种显示装置的第二截面示意图，其中，第一截面示意图为显示装置沿拼缝长度方向上的截面图，第二截面示意图为显示装置沿拼缝宽度方向上的截面图。作为本申请的第一实施例，公开了一种显示装置100，所述显示装置100包括背光模组200，以及与所述背光模组200对应的显示面板400，所述背光模组200为所述显示面板400提供背光源。在所述背光模组200中，包括背板210和多个灯板组件220，多个所述灯板组件220设置在所述背板210上，且相邻所述灯板组件220之间存在拼缝230，所述背光模组200还包括至少一个导光板240和至少一个侧光源250，所述导光板240设置在所述拼缝230处，所述侧光源250与所述导光板240对应，且位于所述导光板240的侧面，为所述导光板240提供光源。
其中，导光板240的侧面既涵盖导光板240的端部，也涵盖导光板240的两侧；侧光源250的数量可以与导光板240的数量相同，侧光源250与导光板240一一对应，此时侧光源250可以只位于导光板240的端部，也可以只位于导光板240的两侧；侧光源250的数量也可以多于导光板240的数量，此时一个导光板240对应设置多个侧光源250，多个侧光源250可以同时位于导光板240的两端，可以同时位于导光板240的两侧；或既位于导光板240的端部，又位于导光板240的两侧。当然，所述背光模组200还包括光学膜片300等结构，在此不一一列举说明。
相对于通过在灯板组件220的拼缝230处设置反射片270来解决显示时出现的拼缝230暗线等问题的方案来说，本申请通过在灯板组件220的拼缝230处设置导光板240和侧光源250，侧光源250发出的光从导光板240的侧面射入，经过导光板240的导光作用后，从导光板240的顶部射出，使得拼缝230处发光，从而解决拼缝230暗线的问题。而且由于目前的反射片270方案中，反射片270只是将灯板221上发光单元222发出的光反射出去，且发光单元222都在反射片270的侧边，发光单元222发出的光都是斜着朝向反射片270的，经过反射片270反射回的光线也是倾斜的，导致从拼缝230发出的光很杂乱；而本申请中导光板240发出的光能够垂直地从拼缝230处发射出，使得从拼缝230各处发出的光都是均匀排列的，从而提高了背光模组200的出光效果。
在本实施例中，背板210上设有至少一个凹槽211，凹槽211是背板210冲压成型出来的，在组装背光模组200时，将导光板240和侧光源250放入凹槽211内，将导光板240粘贴在凹槽211的底部，将侧光源250粘接在凹槽211的侧壁上，使侧光源250发光的一面正对着导光板240的侧面。侧光源250采用一般的LED灯即可，当然也可以采用其它类型的发光结构。至于侧光源250的走线方式和控制方式，和灯板组件220中的发光单元222采用相 同的方式即可，都一起连接到相同的电源和控制芯片，和灯板组件220中的发光单元222一样受到相同的驱动，使得背光模组200在搭配导光板240和侧光源250后，各处仍能根据显示要求进行局域调光，使得显示效果更好。
进一步的，所述侧光源250通过导热胶290固定在背板210上，即凹槽211的侧壁上，这样当侧光源250长时间工作发热时，热量能够通过导热胶290传递到背板210上，由于背板210一般采用金属材料，散热效果好，能够及时将传递到背板210上的热量散发出去，避免侧光源250积蓄较高的热量，影响到侧光源250附近的走线和膜层。而且，侧光源250的顶部还设有作为反射结构的小白反291，一来可以将侧光源250发出的光反射到导光板240上，提高光利用率；二来由于侧光源250是做在凹槽211内的，且侧光源250的顶部覆盖有小白反291，使得侧光源250发出的光只能通过导光板240发射出去，从而不会从其他地方照射出，不会造成漏光，也不会影响灯板组件220中的出光效果。
而在凹槽211内，还可以进一步设置反射片270，反射片270固定在凹槽211的底部，具体可采用0.05mm无基材双面胶粘贴到背板210上，位于导光板240的底部；当然，还可以增大反射片270的面积，使得反射片270不仅只做到导光板240的底部，还做到侧光源250的底部，使得反射效果更好；此时，所述导光板240的正投影和所述侧光源250的正投影，都与所述反射片270的正投影重叠。在组装时，可以先将反射片270粘接在凹槽211的底部，将侧光源250粘接到凹槽211的侧壁，然后将导光板240粘接到反射片270上；也可以根据具体情况调整安装顺序，在此并不做限定。
由于灯板组件220之间的拼缝230较小，若不在背板210上设置凹槽211，将导光板240做到相邻两个灯板组件220之间的话，要么需要扩大灯板组件220之间的拼缝230尺寸，要么通过复杂工艺将导光板240分割成小尺寸，都会使得背光模组200的生产工艺更加复杂；而且还会使得导光板240的性能变差，因为导光板240的尺寸不能过小，导光板240需要一定的宽度确保射入的入光量，导光板240还需要一定的高度确保将入射光的角度导成垂直的发射光。如果导光板240的宽度不够，会使得入光量过小，从而导致导光板240的出光亮度变暗；如果导光板240的厚度不够，会使得导光板240的导光效果不会，从而导致导光板240的出光均匀性变差。因此本实施例通过在背板210上增设凹槽211，将导光板240做到凹槽211内，不需要占用拼缝230处的面积，这样导光板240的宽度能够大于所述拼缝230的宽度，导光板240的厚度能够大于所述灯板组件220的厚度；这样不需要改变原有的拼缝230宽度，就能使得导光板240的出光亮度和出光均匀性满足使用需求。
并且，如图3所示，所述背光模组200还包括反光层280，所述反光层280设置在所述导光板240中与所述灯板组件220相对的一侧。将导光板240做到凹槽211中以后，由于导光板240的宽度大于拼缝230的宽度，导光板240在远离背板210的一侧只有一部分与拼缝 230是重叠的，导光板240的发射光只能通过与拼缝230重叠的这一小块区域发射出去，而导光板240在远离背板210一侧的其它区域，即导光板240与灯板组件220相对的部分，导光板240的发射光会被灯板组件220中的灯板221遮挡住，不能将光线射出，造成光浪费。基于此，本实施例在导光板240中与所述灯板组件220相对的一侧设置反光层280，将被灯板组件220遮挡住的光反射回导光板240，再经过导光板240底部的反射片270的反射作用，会有部分光被反射到拼缝230处，提高光利用率。而且，还可以进一步地将导光板240中与所述灯板组件220相对的一侧设置为斜面，此时对应的反光层280也是倾斜设置的，通过控制反光层280的斜面角度，能够将被反光层280反射回的光线倾斜地照射到反射片270上，这样汇聚到导光板240中对应拼缝230处的光会更多，从而进一步提高了光利用率。
另外，在本实施例中，导光板240和灯板组件220之间是不连接的，只是相互抵接，导光板240对灯板组件220的边缘进行支撑。当灯板组件220受热膨胀时，灯板组件220中的灯板221可以朝拼缝230处延伸，不会受到导光板240的制约，从而不会使得灯板组件220中的灯板221出现褶皱、开裂的问题。
实施例二：
如图4所示，是本申请第二实施例提供的一种显示装置的截面示意图，即显示装置100在拼缝230宽度方向上的截面示意图，与第一实施例不同的是，本实施例中导光板240除了含有如第一实施例中位于凹槽211内的部分外，还包括位于拼缝230处的部分，具体的，所述导光板240包括主体部241和限位部242，所述主体部241设置在所述凹槽211内，位于所述灯板组件220的底部；所述限位部242设置在所述主体部241远离所述背板210的一侧，位于相邻所述灯板组件220之间，对所述灯板组件220限位。
此时，相对于第一实施例来说，导光板240中与拼缝230重叠的区域的高度更大，因为原来导光板240中与拼缝230重叠的区域的顶部，与凹槽211的顶部平齐，导光板240中与拼缝230重叠的区域的高度不超过凹槽211的深度；而现在导光板240中与拼缝230重叠的区域至少做到了相邻两个灯板组件220之间，突出于凹槽211的顶部，因此导光板240中与拼缝230重叠的区域的高度更大，对光线的导光效果会更好。
而且，在本实施例中，沿拼缝230的宽度方向，限位部242的截面与拼缝230的形状相同，都为方形的长条状结构，与主体部241是一体成型的。当在组装背光模组200的时候，先在背板210上固定好导光板240和侧光源250，此时四个导光板240中的限位部242围成一个断开或连续的口字形限位结构，在组装灯板组件220时，将每个灯板组件220放入口字形限位结构中即可，不会出现灯板组件220排布错乱的问题，极大地加快了员工的组装效率。
当四个导光板240中的限位部242围成一个连续的口字形限位结构时，导光板240的长度与限位部242的长度相等，此时灯板组件220的边缘各处都与限位部242抵接，对灯板组 件220的限位效果更好；而且所有导光板240中对应拼缝230处的高度都相等，使得背板210上所有导光板240的出光效果均匀一致。
本实施例中在沿拼缝230的宽度方向，导光板240的截面类似于凸字形，限位部242为凸字形顶部的一部分。限位部242的顶部与灯板组件220的顶部可以是平齐的，使得从导光板240发出的光达到与灯板组件220相同的出光效果；而且此时光学膜片300可以直接贴在灯板组件220和限位部242上，光学膜片300的底部各处受到的支撑效果相同，能够保证光学膜片300的平整度。当然，限位部242的顶部还可以低于灯板组件220的顶部，或者高于灯板组件220的顶部，这些都不影响导光板240对灯板组件220的限位效果。
实施例三：
如图4所示，是本申请第三实施例提供的一种显示装置的截面示意图，即显示装置100在拼缝230宽度方向上的截面示意图，与第二实施例不同的是，本实施例中的限位部242除了一部分位于相邻灯板组件220之间外，还有一部分限位部242位于灯板组件220的上方。具体的，所述限位部242包括第一连接部243和第二连接部244，所述第一连接部243的一端与所述主体部241连接，另一端与所述第二连接部244连接，且所述第一连接部243的宽度小于第二连接部244的宽度和所述主体部241的宽度；所述灯板组件220包括灯板221和多个发光单元222，多个所述发光单元222设置在所述灯板221远离所述背板210的一侧；所述第一连接部243的高度大于所述灯板221的厚度，所述灯板221的端部设置在所述主体部241和第二连接部244之间，位于限位部242和主体部241形成的卡口内。
相对于第二实施例来说，本实施例中的限位部242对于灯板组件220的限位效果更好，因为限位部242与主体部241形成卡口，限位部242不仅从灯板组件220的侧边对灯板组件220进行限位，还从灯板组件220的上方对灯板组件220进行限位。在组装灯板组件220时，将灯板组件220中灯板221的边缘插入限位部242中的卡口内，甚至都不需要额外的工艺或结构再将灯板组件220与背板210固定到一起，从而使得整个背光模组200的组装过程更加简单高效。
不仅如此，本实施例通过第二连接部244将光学膜片300与灯板组件220隔开，使得光学膜片300与灯板组件220产生间隙，增大灯板组件220中发光单元222的出光距离，提高灯板组件220的出光均匀效果，当显示装置100中显示面板400的尺寸较大时，对灯板组件220的发光要求更高，此时将本实施例中的技术方案运用于大尺寸面板效果会更好。
在所述沿拼缝230的宽度方向，所述第一连接部243和第二连接部244的截面都为方形，此时限位部242的截面为T字形；第二连接部244的截面也可以为半圆形，此时限位部242的截面为伞形或蘑菇形，当然第二连接部244的截面还可以是其它形状。
在背板210上安装好导光板240以后，可以在限位部242与主体部241之间形成的卡口 内填充光学胶260，将导光板240和灯板组件220固定住，提高灯板组件220的稳定性。而且，光学胶260凝固后不仅会将导光板240与灯板221隔开，光学胶260本身还会有一定的弹性，即使灯板221受热膨胀也只会挤压光学胶260使得光学胶260变形，但不会使得导光板240和灯板221直接接触，从而不会影响到灯板221形变，不会使得灯板221出现褶皱、开裂的问题。进一步的，在限位部242与主体部241之间形成的卡口内，光学胶260涂布在卡口的三个内侧壁上，即所述第二连接部244组成所述卡口的第一侧，所述第一连接部243组成所述卡口的第二侧，所述主体部241组成所述卡口的第三侧，光学胶涂布在第一侧、第二侧和第三侧上，此时灯板221不管是横向膨胀还是纵向膨胀都不会受到导光板240的挤压，更好地解决了灯板221的热胀冷缩问题。
需要说明的是，本申请的发明构思可以形成非常多的实施例，但是申请文件的篇幅有限，无法一一列出，因而，在不相冲突的前提下,以上描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例，各实施例或技术特征组合之后，将会增强原有的技术效果
以上内容是结合具体的可选实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (17)

  1. 一种背光模组，包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背光模组还包括：
    至少一个导光板，设置在所述拼缝处；以及
    至少一个侧光源，与所述导光板对应，且位于所述导光板的侧面，为所述导光板提供光源。
  2. 如权利要求1所述的背光模组，其中，所述背板朝向所述灯板组件的一面设有至少一个凹槽，所述导光板和所述侧光源对应设置在所述凹槽内，与所述背板固定连接；
    所述导光板的宽度大于所述拼缝的宽度，所述导光板的厚度大于所述灯板组件的厚度。
  3. 如权利要求2所述的背光模组，其中，所述导光板和所述灯板组件抵接。
  4. 如权利要求2所述的背光模组，其中，所述导光板包括主体部和限位部，所述主体部设置在所述凹槽内，位于所述灯板组件的底部；
    所述限位部设置在所述主体部远离所述背板的一侧，位于相邻所述灯板组件之间，对所述灯板组件限位。
  5. 如权利要求4所述的背光模组，其中，所述背光模组还包括反射片和反光层，所述反射片设置在所述主体部远离所述灯板组件的一侧，所述反光层设置在所述主体部中与所述灯板组件相对的一侧。
  6. 如权利要求4所述的背光模组，其中，沿所述拼缝的宽度方向，所述限位部的截面为方形，所述限位部与所述灯板组件抵接，且所述限位部的顶部与所述灯板组件的顶部平齐。
  7. 如权利要求4所述的背光模组，其中，所述限位部包括第一连接部和第二连接部，所述第一连接部的一端与所述主体部连接，另一端与所述第二连接部连接，且所述第一连接部的宽度小于所述第二连接部的宽度和所述主体部的宽度；
    所述灯板组件包括灯板和多个发光单元，多个所述发光单元设置在所述灯板远离所述背板的一侧；所述第一连接部的高度大于所述灯板的厚度，所述灯板的端部设置在所述主体部和第二连接部之间。
  8. 如权利要求7所述的背光模组，其中，沿所述拼缝的宽度方向，所述第一连接部和第二连接部的截面都为方形，所述限位部的截面为T字形。
  9. 如权利要求7所述的背光模组，其中，沿所述拼缝的宽度方向，所述第一连接部的截面方形，所述第二连接部的截面为半圆形。
  10. 如权利要求7所述的背光模组，其中，所述限位部的顶部高于所述灯板组件的顶部。
  11. 如权利要求7所述的背光模组，其中，在所述限位部与所述主体部之间形成的卡口内，所述第二连接部组成所述卡口的第一侧，所述第一连接部组成所述卡口的第二侧，所述主体部组成所述卡口的第三侧，所述第一侧、第二侧和第三侧涂布有光学胶。
  12. 如权利要求2所述的背光模组，其中，所述导光板粘贴在所述凹槽的底部，所述侧光源粘接在所述凹槽的侧壁。
  13. 如权利要求12所述的背光模组，其中，所述侧光源通过导热胶粘接在所述凹槽的侧壁。
  14. 如权利要求12所述的背光模组，其中，所述侧光源的顶部设有小白反，所述小白反反射所述侧光源发出的光。
  15. 如权利要求12所述的背光模组，其中，所述背光模组包括反射片，所述反射片固定在所述凹槽的底部，所述导光板的正投影和所述侧光源的正投影，都与所述反射片的正投影重叠。
  16. 一种背光模组，包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背板朝向所述灯板组件的一面设有至少一个凹槽，所述背光模组还包括：
    反射片，与所述凹槽对应设置，固定在所述凹槽的底部；
    导光板，设置在所述拼缝处，所述导光板包括主体部和限位部，所述主体部设置在所述凹槽内，固定在所述反射片上，且位于所述灯板组件的底部；所述限位部设置在所述主体部远离所述背板的一侧，位于相邻所述灯板组件之间，对所述灯板组件限位；所述导光板为凸字形；
    侧光源，位于所述导光板的侧面，为所述导光板提供光源，所述侧光源通过导热胶粘接在所述凹槽的侧壁；以及
    反光层，设置在所述主体部中与所述灯板组件相对的一侧。
  17. 一种显示装置，包括背光模组，以及与所述背光模组对应的显示面板，所述背光模组为所述显示面板提供背光源；
    所述背光模组包括背板和多个灯板组件，多个所述灯板组件设置在所述背板上，且相邻所述灯板组件之间存在拼缝，所述背光模组还包括：
    至少一个导光板，设置在所述拼缝处；以及
    至少一个侧光源，与所述导光板对应，且位于所述导光板的侧面，为所述导光板提供光源。
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