WO2023133918A1 - 背光模组和液晶显示装置 - Google Patents

背光模组和液晶显示装置 Download PDF

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Publication number
WO2023133918A1
WO2023133918A1 PCT/CN2022/072957 CN2022072957W WO2023133918A1 WO 2023133918 A1 WO2023133918 A1 WO 2023133918A1 CN 2022072957 W CN2022072957 W CN 2022072957W WO 2023133918 A1 WO2023133918 A1 WO 2023133918A1
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WO
WIPO (PCT)
Prior art keywords
positioning structure
area
positioning
backlight module
light
Prior art date
Application number
PCT/CN2022/072957
Other languages
English (en)
French (fr)
Inventor
魏起
刘凡成
Original Assignee
武汉华星光电技术有限公司
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Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Publication of WO2023133918A1 publication Critical patent/WO2023133918A1/zh

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Classifications

    • 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

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a liquid crystal display device.
  • mini LED Small Light Emitting Diode
  • existing side-entry backlights will dig grooves on the lower frame and set protrusions on the optical film to position the optical film, but this design will result in a larger width of the plastic frame of the lower frame of the side-entry backlight , the frame width of the backlight module is relatively large.
  • the mini LED backlight does not require a side-type light source, which can make the surrounding frame narrower, but the optical diaphragm cannot be positioned.
  • the existing mini The LED backlight will also use the positioning method of side-type backlight to increase the width of the plastic frame to position the optical film, but because this method will increase the width of the plastic frame, the frame width of the backlight module will be larger, which cannot be realized. Narrow bezel design.
  • the existing mini LED backlight has the technical problem that the frame of the backlight module is relatively large due to the need to increase the width of the plastic frame to position the optical film.
  • the embodiments of the present application provide a backlight module and a liquid crystal display device, which are used to alleviate the technical problem of the existing mini LED backlight that requires increasing the width of the plastic frame for positioning the optical film, resulting in a larger frame of the backlight module.
  • An embodiment of the present application provides a backlight module, which includes:
  • a light-emitting chip is arranged on the side of the flexible circuit board away from the backplane;
  • the backlight module further includes a positioning structure, the positioning structure is set on the side of the flexible circuit board away from the backplane, and the positioning structure is set outside the corresponding area of the light-emitting chip, the positioning structure
  • the height of the structure is greater than or equal to the maximum thickness of the optical film, and the optical film is provided with an anti-positioning structure corresponding to the positioning structure.
  • the backlight module includes a first area, a second area, a third area and a fourth area located around the corresponding area of the light-emitting chip;
  • the positioning structure includes a first positioning structure and a second positioning structure, the first positioning structure is arranged in one of the first area, the second area, the third area and the fourth area, The second positioning structure is disposed on the other one of the first area, the second area, the third area and the fourth area.
  • the backlight module includes a first corner region at the junction of the first region and the second region, a second corner region at the junction of the first region and the third region, the second region and the third region.
  • the third angular area at the junction of the fourth area, the fourth angular area at the junction of the third area and the fourth area, the first angular area, the second angular area, the third angular area and the At least one of the fourth corner regions is provided with the positioning structure.
  • the first positioning structure is disposed on one of the first corner area, the second corner area, the third corner area and the fourth corner area, and the second positioning structure The other one of the first corner area, the second corner area, the third corner area and the fourth corner area is provided.
  • the first positioning structure is disposed on one of the first corner area, the second corner area, the third corner area and the fourth corner area, and the second positioning structure It is disposed in a non-junction area of the first area, the second area, the third area and the fourth area.
  • the anti-positioning structure includes a first anti-positioning structure and a second anti-positioning structure
  • the optical film includes a prism sheet and a diffusion sheet
  • the prism sheet is provided with the first anti-positioning structure
  • the diffusion sheet is provided with the second anti-positioning structure
  • the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure
  • the second anti-positioning structure corresponds to the second positioning structure Corresponding structures
  • the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure
  • the second anti-positioning structure corresponds to the first positioning structure and the second positioning structure.
  • the first positioning structure is different from the second positioning structure, and the anti-positioning structure on the optical film is the same as at least one of the first positioning structure and the second positioning structure. a corresponding setting.
  • the optical film includes a color conversion film, a dodging film, a prism sheet and a diffusion sheet, the color conversion film is arranged between the light-emitting chip and the dodging film, and the prism sheet
  • the light uniform film is arranged on the side away from the color conversion film
  • the diffusion sheet is arranged on the side of the prism sheet away from the light uniform film
  • the color conversion film is provided with a third anti-positioning structure
  • the homogenizing film is provided with a fourth anti-positioning structure
  • the prism sheet is provided with a fifth anti-positioning structure
  • the diffusion sheet is provided with a sixth anti-positioning structure
  • the height of the first positioning structure is equal to the height of the uniform film, and the height of the second positioning structure is greater than or equal to the height of the diffusion sheet;
  • the third anti-positioning structure and the fourth anti-positioning structure are arranged correspondingly to the first positioning structure, and the fifth anti-positioning structure and the sixth anti-positioning structure are corresponding to the first positioning structure and the sixth anti-positioning structure.
  • the second anti-positioning structure is set correspondingly; or the third anti-positioning structure and the fourth anti-positioning structure are set correspondingly to the first positioning structure and the second positioning structure, and the fifth anti-positioning structure and the The sixth anti-positioning structure is provided corresponding to the first positioning structure and the second anti-positioning structure.
  • the positioning structure includes a positioning post
  • the anti-positioning structure includes a through hole corresponding to the positioning post
  • the positioning structure material includes silica gel and titanium dioxide.
  • the backlight module further includes a reflective structure, the reflective structure is disposed on the side of the flexible circuit board away from the backplane, and the reflective structure is disposed between the light-emitting chips, The height of the reflective structure is greater than that of the light-emitting chip, and the height of the reflective structure is less than or equal to the minimum thickness of the optical film.
  • the array of reflective structures is arranged between the light-emitting chips, and the difference between the height of the reflective structure at the junction of a row of reflective structures and a column of reflective structures and the heights of other reflective structures ranges from 0.05 mm to 0.08 mm.
  • the reflective structure includes a first part disposed between the light-emitting chips and a second part disposed outside the corresponding area of the light-emitting chips, the second part of the reflective structure is disposed at the position between the structures, and fill the gaps between the adjacent positioning structures.
  • an embodiment of the present application provides a liquid crystal display device, the liquid crystal display device includes a liquid crystal display panel and a backlight module, and the backlight module includes:
  • a light-emitting chip is arranged on the side of the flexible circuit board away from the backplane;
  • the backlight module further includes a positioning structure, the positioning structure is set on the side of the flexible circuit board away from the backplane, and the positioning structure is set outside the corresponding area of the light-emitting chip, the positioning structure
  • the height of the structure is greater than or equal to the maximum thickness of the optical film, and the optical film is provided with an anti-positioning structure corresponding to the positioning structure.
  • the backlight module includes a first area, a second area, a third area and a fourth area located around the corresponding area of the light-emitting chip;
  • the positioning structure includes a first positioning structure and a second positioning structure, the first positioning structure is arranged in one of the first area, the second area, the third area and the fourth area, The second positioning structure is disposed on the other one of the first area, the second area, the third area and the fourth area.
  • the backlight module includes a first corner region at the junction of the first region and the second region, a second corner region at the junction of the first region and the third region, the second region and the third region.
  • the third angular area at the junction of the fourth area, the fourth angular area at the junction of the third area and the fourth area, the first angular area, the second angular area, the third angular area and the At least one of the fourth corner regions is provided with the positioning structure.
  • the first positioning structure is disposed on one of the first corner area, the second corner area, the third corner area and the fourth corner area, and the second positioning structure The other one of the first corner area, the second corner area, the third corner area and the fourth corner area is provided.
  • the first positioning structure is disposed on one of the first corner area, the second corner area, the third corner area and the fourth corner area, and the second positioning structure It is disposed in a non-junction area of the first area, the second area, the third area and the fourth area.
  • the anti-positioning structure includes a first anti-positioning structure and a second anti-positioning structure
  • the optical film includes a prism sheet and a diffusion sheet
  • the prism sheet is provided with the first anti-positioning structure
  • the diffusion sheet is provided with the second anti-positioning structure
  • the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure
  • the second anti-positioning structure corresponds to the second positioning structure Corresponding structures
  • the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure
  • the second anti-positioning structure corresponds to the first positioning structure and the second positioning structure.
  • the first positioning structure is different from the second positioning structure, and the anti-positioning structure on the optical film is the same as at least one of the first positioning structure and the second positioning structure. a corresponding setting.
  • the application provides a backlight module and a liquid crystal display device;
  • the backlight module includes a backplane, a flexible circuit board, a light-emitting chip and an optical film, the flexible circuit board is arranged on one side of the backboard, and the light-emitting chip is arranged on the flexible circuit board away from the On one side of the backplane, the optical film is arranged on the side of the light-emitting chip away from the flexible circuit board, wherein the backlight module also includes a positioning structure, which is arranged on the side of the flexible circuit board away from the backplane, and the positioning structure is arranged on Outside the area corresponding to the light-emitting chip, the height of the positioning structure is greater than or equal to the maximum thickness of the optical film, and the optical film is provided with an anti-positioning structure corresponding to the positioning structure.
  • the positioning structure is set outside the corresponding area of the light-emitting chip, and by setting the anti-positioning structure on the optical film, the positioning structure on the side of the light-emitting chip can be compared with the anti-positioning structure.
  • the corresponding structure is used to position and fix the optical film.
  • FIG. 1 is a first schematic diagram of a conventional liquid crystal display device.
  • FIG. 2 is a second schematic diagram of a conventional liquid crystal display device.
  • FIG. 3 is a schematic diagram of a first type of backlight module provided by an embodiment of the present application.
  • FIG. 4 is a second schematic view of the backlight module provided by the embodiment of the present application.
  • FIG. 5 is a third schematic diagram of the backlight module provided by the embodiment of the present application.
  • FIG. 6 is a fourth schematic view of the backlight module provided by the embodiment of the present application.
  • FIG. 7 is a fifth schematic diagram of the backlight module provided by the embodiment of the present application.
  • FIG. 8 is a sixth schematic diagram of a backlight module provided by an embodiment of the present application.
  • FIG. 9 is a seventh schematic diagram of a backlight module provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a liquid crystal display device provided by an embodiment of the present application.
  • the side-type backlight module includes a backplane 111, a reflection sheet 112, a side light source 113, a light guide plate 114, a prism sheet 115, and a diffusion sheet 116.
  • the width of the frame on one side of the backlight module needs to be increased.
  • grooves need to be provided on the plastic frame, so that the width of the plastic frame is larger, which will further increase the width of the frame of the backlight module, resulting in a larger frame of the backlight module.
  • the existing mini LED backlights have the technical problem that the frame of the backlight module is relatively large due to the need to increase the width of the plastic frame to position the optical film.
  • Embodiments of the present application aim at the above-mentioned technical problems, and provide a backlight module and a liquid crystal display device to alleviate the above-mentioned technical problems.
  • the backlight module 2 includes:
  • a flexible circuit board 22 is arranged on one side of the backboard 21;
  • the light emitting chip 23 is arranged on the side of the flexible circuit board 22 away from the backplane 21;
  • the optical film 24 is arranged on the side of the light-emitting chip 23 away from the flexible circuit board 22;
  • the backlight module 2 further includes a positioning structure 25, the positioning structure 25 is set on the side of the flexible circuit board 22 away from the back plate 21, and the positioning structure 25 is set on the light emitting chip 23 Outside the corresponding area 231 , the height of the positioning structure 25 is greater than or equal to the maximum thickness of the optical film 24 , and the optical film 24 is provided with an anti-positioning structure 245 corresponding to the positioning structure 25 .
  • An embodiment of the present application provides a backlight module.
  • the backlight module sets a positioning structure on the side of the flexible circuit board away from the backplane, sets the positioning structure outside the corresponding area of the light-emitting chip, and sets a reverse positioning structure on the optical film. structure, so that the positioning structure on the side of the light-emitting chip can be matched with the anti-positioning structure to position and fix the optical film.
  • This design only needs to add a positioning structure on the side of the light-emitting chip without increasing the width of the frame of the backlight module.
  • the positioning of the diaphragm simultaneously reduces the frame width of the backlight module.
  • the height of the positioning structure refers to the height of the backplane or the flexible circuit board as the reference plane
  • the maximum thickness of the optical film refers to the height of the optical film that is at the furthest distance from the backplane when the reference plane of the positioning structure is the same.
  • the height of the far film layer, the minimum thickness of the optical film refers to when it is the same as the reference plane of the positioning structure, the height of the film layer that is located in the optical film and the backplane is the closest, for example, in Fig.
  • the positioning structure 25 The height refers to the distance between the upper surface of the flexible circuit board 22 and the upper surface of the diffusion sheet 244, and the maximum thickness of the optical film 24 refers to the distance between the upper surface of the flexible circuit board 22 and the upper surface of the diffusion sheet 244
  • the minimum thickness of the optical film 24 refers to the distance between the upper surface of the flexible circuit board 22 and the lower surface of the color conversion film 241 , which will not be repeated in the following embodiments.
  • the four corner areas of the optical film will also be provided with anti-positioning structures 245 correspondingly, as shown in (b) in FIG. 4, when the positioning structure is arranged in different regions, the anti-positioning structure 245 will also include a first anti-positioning structure 245a and a second anti-positioning structure 245b, which are correspondingly arranged at the location of the positioning structure to perform The positioning is fixed.
  • the positioning structure includes one. By setting a positioning structure, the positioning structure cooperates with the anti-positioning structure, thereby positioning the optical film.
  • the positioning structure on the periphery of the light-emitting chips in the present application, it can avoid that when the positioning structure is arranged between the light-emitting chips, there will be no light at the corresponding position of the positioning structure, resulting in dark spots on the display device.
  • the positioning structure includes a first positioning structure and a second positioning structure. By arranging the first positioning structure and the second positioning structure, at least two positioning structures cooperate with the anti-positioning structure on the optical film to improve the positioning and fixing effect of the optical film.
  • the backlight module includes a first area 311, a second area 312, a third area 313 and a fourth area 314 located around the corresponding area of the light-emitting chip 23;
  • the positioning structure 25 includes a first positioning structure 251 and a second positioning structure 252, and the first positioning structure 251 is arranged on the first area 311, the second area 312, the third area 313 and the In one of the fourth regions 314 , the second positioning structure 252 is disposed on the other of the first region 311 , the second region 312 , the third region 313 and the fourth region 314 .
  • the positioning structure include a first positioning structure and a second positioning structure, and making the first positioning structure and the second positioning structure be arranged in at least two areas, the optical film can be positioned by positioning structures in different directions without adding The width of the frame of the backlight module, and the positioning effect is better than that of the positioning structure on the same side.
  • both the first area and the second area may include the first corner area, or the first area includes the first corner area and the second area does not include the first corner area.
  • the first positioning structure is arranged in one of the first region, the second region, the third region and the fourth region
  • the second positioning structure is arranged in the first region, the first region, and the fourth region.
  • the first positioning structure is arranged in the overlapping part of the two areas , the state in which the second positioning structure is disposed in one of the two regions, and the state in which the first positioning structure and the second positioning structure are disposed in the non-junction region of the two regions, although the first positioning structure and the second positioning structure are included It is not the state of being arranged on two sides. Since multiple positioning structures can still improve the positioning effect at this time, it is also the protection scope of this field, and will not be repeated here.
  • the backlight module includes a first corner region 321 at the junction of the first region 311 and the second region 312, and a corner region 321 at the junction of the first region 311 and the third region 313.
  • the volume of the positioning structure can be Correspondingly larger, to avoid problems such as breakage and inaccurate positioning caused by too small positioning structure; the corresponding anti-positioning structure of the optical film can also be set on the corner, and since the light is mainly emitted from the corresponding area of the light-emitting chip, the optical film’s Less impact and less impact on the glow effect.
  • the first positioning structure 251 is disposed on the first corner region 321 , the second corner region 322 , the third corner region 323 and the fourth corner region 324
  • the second positioning structure 252 is disposed on the other of the first corner region 321 , the second corner region 322 , the third corner region 323 and the fourth corner region 324 .
  • the optical film can be positioned and fixed through the positioning structure in the corner area and the anti-positioning structure without adding a backlight
  • the width of the frame of the module does not form an anti-positioning structure on the part of the optical film corresponding to the light-emitting area, so that the optical film is relatively complete and processes light.
  • the first positioning structure and the second positioning structure are arranged in the corner area on the same side of the backlight module, for example, the first corner area and the second corner area are the corner areas on the same side,
  • the two positioning structures are arranged on the same side, so that when the optical film is bonded to the light-emitting chip, the optical film is positioned from the side with the positioning structure and then bonded to realize the positioning and fixing of the optical film.
  • the first positioning structure and the second positioning structure are arranged in the diagonal corner area of the backlight module, for example, the first corner area and the third corner area are diagonal corner areas, and the first positioning structure and the second The positioning structure is set at the opposite corner.
  • the positioning structure is set diagonally. The structure can stably fix the optical film.
  • the first positioning structure 251 is disposed on the first corner region 321 , the second corner region 322 , the third corner region 323 and the fourth corner region 324
  • the second positioning structure 252 is disposed in a non-junction area of the first area 311 , the second area 312 , the third area 313 and the fourth area 314 .
  • the anti-positioning structure 245 includes a first anti-positioning structure 245a and a second anti-positioning structure 245b
  • the optical film 24 includes a prism sheet 243 and a diffusion sheet 244, so
  • the prism sheet 243 is provided with a first anti-positioning structure 245a
  • the diffusion sheet 244 is provided with a second anti-positioning structure 245b.
  • the first anti-positioning structure 245a is compatible with the first positioning structure 251 and the second positioning structure.
  • the positioning structure 252 corresponds, and the second anti-positioning structure 245b corresponds to the second positioning structure 252; or the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure, and the first anti-positioning structure corresponds to the second positioning structure.
  • the two anti-positioning structures correspond to the first positioning structure and the second positioning structure.
  • the first anti-positioning structure 245a includes a first portion 411 corresponding to the first positioning structure 251 and a second portion 412 corresponding to the second positioning structure 252.
  • the positioning structure when setting the positioning structure, for some film layers, it can be set corresponding to all the positioning structures, and for some film layers, it can be set corresponding to some positioning structures.
  • the second anti-location structure as an example is described in detail.
  • the embodiment of the present application is not limited thereto.
  • the second anti-positioning structure may also be provided corresponding to multiple positioning structures, and the first anti-positioning structure may be provided corresponding to multiple positioning structures.
  • the structure of the first positioning structure 251 is different from that of the second positioning structure 252, and the anti-positioning structure 245 on the optical film 24 is the same as the structure of the second positioning structure 252. At least one of the first positioning structure 251 and the second positioning structure 252 is provided correspondingly.
  • the optical film 24 includes a color conversion film 241, a uniform light film 242, a prism sheet 243 and a diffusion sheet 244, and the color conversion film 241 is arranged on the light-emitting chip.
  • the prism sheet 243 is arranged on the side of the uniform film 242 away from the color conversion film 241
  • the diffusion sheet 244 is arranged on the side of the prism sheet 243 away from the One side of the uniform light film 242
  • the color conversion film is provided with a third reverse positioning structure
  • the uniform light film is provided with a fourth reverse positioning structure
  • the prism sheet is provided with a fifth reverse positioning structure
  • the diffusion sheet is provided with a fifth reverse positioning structure. Equipped with a sixth anti-positioning structure;
  • the height of the first positioning structure is equal to the height of the uniform film, and the height of the second positioning structure is greater than or equal to the height of the diffusion sheet;
  • the third anti-positioning structure and the fourth anti-positioning structure are arranged correspondingly to the first positioning structure, and the fifth anti-positioning structure and the sixth anti-positioning structure are corresponding to the first positioning structure and the sixth anti-positioning structure.
  • the second anti-positioning structure is set correspondingly; or the third anti-positioning structure and the fourth anti-positioning structure are set correspondingly to the first positioning structure and the second positioning structure, and the fifth anti-positioning structure and the The sixth anti-positioning structure is provided corresponding to the first positioning structure and the second anti-positioning structure.
  • different optical diaphragms can be provided with different anti-positioning structures, so that the anti-positioning structures can cooperate with positioning structures of different heights and shapes, and the optical diaphragm can be realized through different positioning structures. positioning without increasing the width of the frame of the backlight module, and the stability of the positioning and fixing of the optical film is improved through the design of different positioning structures.
  • the positioning structure includes a positioning post
  • the anti-positioning structure includes a through hole corresponding to the positioning post.
  • the cross-sectional shape of the positioning structure can be cone-shaped, and it can actually be set in the form of a circular truncated cylinder and a circular hole. Since the cylinder and the circular hole do not have edges and corners, it avoids damage to the optics. Scratches and scratches from the diaphragm or positioning structures cause loss of light.
  • the embodiment of the present application is not limited thereto.
  • the positioning structure may be a cuboid, a cylinder, a prism plus a cuboid, etc., which will not be repeated here.
  • the positioning structure includes a positioning post, and a through hole is provided on the positioning post, and the anti-positioning structure includes a protrusion that cooperates with the through hole.
  • the optical diaphragm forms a protrusion to avoid the loss of light, so that the positioning post will not exceed the optical diaphragm, and the optical diaphragm and the positioning structure are closely matched.
  • via holes can be set on the prism sheet in the optical film, and protrusions can be provided on the diffusion sheet.
  • the via holes on the diffuser sheet cooperate with the protrusions on the diffuser sheet to complete the positioning of the optical diaphragm, and prevent the diffuser sheet located on the outside from being set on the entire surface to process light.
  • the material of the positioning post includes silica gel and titanium dioxide.
  • silica gel and titanium dioxide By using silica gel and titanium dioxide to form a positioning structure, a white positioning structure can be obtained to improve the reflection effect on light, so that when the light is emitted to the positioning structure, the light will be reflected, thereby improving the positive brightness and avoiding light loss.
  • the positioning structure includes a reflective layer, and the reflective layer is arranged on the side that is in contact with the anti-positioning structure.
  • the positioning structure includes a first positioning structure and a second positioning structure as an example to describe in detail, but the embodiment of the present application is not limited thereto, for example, the positioning structure may include multiple positioning structures located around , and the shape, size, and height of each positioning structure can be set according to requirements. Specifically, it can be set analogously to the setting method of the first positioning structure and the second positioning structure, which will not be repeated in the embodiments of the present application.
  • the backlight module further includes a reflective structure 51, the reflective structure 51 is arranged on the side of the flexible circuit board 22 away from the backplane, and the reflective The structure 51 is disposed between the light-emitting chips 23, the height of the reflective structure 51 is greater than the height of the light-emitting chip 23, and the height of the reflective structure 51 is smaller than or equal to the minimum thickness of the optical film.
  • the reflective structure array is arranged between the light-emitting chips, and the difference between the height of the reflective structure at the junction of a row of reflective structures and a column of reflective structures and the heights of other reflective structures is 0.05 mm. to 0.08mm.
  • the nozzle is controlled not to eject ink or to eject a small amount of ink at the border , so that the height of the reflective structure at the junction is similar to or even equal to that of other positions, avoiding damage to the optical diaphragm by the reflective structure, and avoiding the control of the light by the reflective structure at a different angle from the preset control angle, resulting in loss or existence of light
  • the problem of uneven lighting by controlling the amount of ink ejected by the nozzle at the junction when the reflective structure is formed, so that after the horizontal reflective structure is formed, when the vertical reflective structure is formed, the nozzle is controlled not to eject ink or to eject a small amount of ink at the border , so that the height of the reflective structure at the junction is similar to or even equal to that of other positions, avoiding damage to the optical diaphragm by the reflective structure, and avoiding the control of the light by the reflective structure at a different angle from the preset control angle, resulting in loss or existence of light The problem of uneven
  • the reflective structure 51 includes a first part disposed between the light-emitting chips 23 and a second part disposed outside the corresponding area of the light-emitting chips 23, the reflective The second part of the structure 51 is disposed between the positioning structures 25 and fills the gap between the adjacent positioning structures 25 .
  • the reflective structure or positioning structure is set around the periphery of the light-emitting chip, so that when the light diverges to the outside of the backlight module, the light can be reflected by the reflective structure or the positioning structure to avoid light loss.
  • the reflective structure 51 and the positioning structure 25 are arranged around the light-emitting chip, and the reflective structure 51 is specifically arranged on Between and around the light-emitting chips 23, the positioning structure 25 is arranged on the periphery of the light-emitting chips, so that the light emitted by the light-emitting chips will be reflected by the reflective structure and the positioning columns, thereby improving the utilization rate of light and avoiding loss of light.
  • the reflective structure includes a base material and a reflective layer, and the reflective layer is arranged around the base material.
  • the material of the reflective structure is the same as that of the positioning structure.
  • the material of the reflective structure includes silica gel and titanium dioxide, and the same material is used to form the positioning structure and the reflective structure, so that when the positioning structure and the reflective structure are formed, the angle of light can be easily controlled, and the backlight module can be improved. production efficiency.
  • the optical film includes a color conversion film, a uniform light film, a prism film and a diffusion film as an example for detailed description.
  • a fluorescent film is provided on the light-emitting chip to convert light of different colors.
  • the color conversion film may not be provided, which will not be repeated in the embodiment of the present application.
  • the embodiment of the present application provides a liquid crystal display device, the liquid crystal display device includes a liquid crystal display panel 61 and a backlight module, and the backlight module includes:
  • a flexible circuit board 22 is arranged on one side of the backboard 21;
  • the light emitting chip 23 is arranged on the side of the flexible circuit board 22 away from the backplane 21;
  • the optical film 24 is arranged on the side of the light-emitting chip 23 away from the flexible circuit board 22;
  • the backlight module 2 further includes a positioning structure 25, the positioning structure 25 is set on the side of the flexible circuit board 22 away from the back plate 21, and the positioning structure 25 is set on the light emitting chip 23 Outside the corresponding area 231 , the height of the positioning structure 25 is greater than or equal to the maximum thickness of the optical film 24 , and the optical film 24 is provided with an anti-positioning structure 245 corresponding to the positioning structure 25 .
  • An embodiment of the present application provides a liquid crystal display device.
  • the liquid crystal display device includes a liquid crystal display panel and a backlight module.
  • the backlight module sets a positioning structure on the side of the flexible circuit board away from the back plate, and sets the positioning structure to correspond to the light-emitting chip. Outside the area, and by setting the anti-positioning structure on the optical film, the positioning structure on the side of the light-emitting chip can be matched with the anti-positioning structure to position and fix the optical film. This design only needs to add a positioning structure on the side of the light-emitting chip. Without increasing the width of the frame of the backlight module, the positioning of the optical film is realized while reducing the width of the frame of the backlight module.
  • the liquid crystal display panel 61 includes a first substrate 611 , a second substrate 613 and a liquid crystal layer 612 disposed between the first substrate 611 and the second substrate 613 .
  • the backlight module includes a first area, a second area, a third area and a fourth area located around the corresponding area of the light-emitting chip;
  • the positioning structure includes a first positioning structure and a second positioning structure, the first positioning structure is arranged in one of the first area, the second area, the third area and the fourth area, The second positioning structure is disposed on the other one of the first area, the second area, the third area and the fourth area.
  • the backlight module includes a first corner region at the junction of the first region and the second region, a second corner region at the junction of the first region and the third region , the third angular area at the junction of the second area and the fourth area, the fourth angular area at the junction of the third area and the fourth area, the first angular area, the second angular area, At least one of the third corner region and the fourth corner region is provided with the positioning structure.
  • the first positioning structure is arranged in one of the first corner region, the second corner region, the third corner region and the fourth corner region
  • the second positioning structure is disposed on the other one of the first corner region, the second corner region, the third corner region and the fourth corner region.
  • the first positioning structure is arranged in one of the first corner region, the second corner region, the third corner region and the fourth corner region , the second positioning structure is disposed in a non-junction area of the first area, the second area, the third area, and the fourth area.
  • the anti-positioning structure includes a first anti-positioning structure and a second anti-positioning structure
  • the optical film includes a prism sheet and a diffusion sheet
  • the prism sheet is provided with the The first anti-positioning structure
  • the diffusion sheet is provided with the second anti-positioning structure
  • the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure
  • the second anti-positioning structure The structure corresponds to the second positioning structure; or the first anti-positioning structure corresponds to the first positioning structure and the second positioning structure, and the second anti-positioning structure corresponds to the first positioning structure and the Corresponds to the second positioning structure described above.
  • the structure of the first positioning structure is different from that of the second positioning structure, and the anti-positioning structure on the optical film is the same as that of the first positioning structure and the structure of the second positioning structure. At least one corresponding setting in the second positioning structure.
  • Embodiments of the present application provide a backlight module and a liquid crystal display device.
  • the backlight module includes a backplane, a flexible circuit board, a light-emitting chip, and an optical film.
  • the flexible circuit board is arranged on one side of the backplane, and the light-emitting chip is arranged on the flexible circuit.
  • the optical film is arranged on the side of the light-emitting chip away from the flexible circuit board
  • the backlight module also includes a positioning structure, the positioning structure is arranged on the side of the flexible circuit board away from the backplane, and the positioning structure It is arranged outside the corresponding area of the light-emitting chip, the height of the positioning structure is greater than or equal to the maximum thickness of the optical film, and the optical film is provided with an anti-positioning structure corresponding to the positioning structure.
  • the positioning structure is set outside the corresponding area of the light-emitting chip, and by setting the anti-positioning structure on the optical film, the positioning structure on the side of the light-emitting chip can be compared with the anti-positioning structure.
  • the corresponding structure is used to position and fix the optical film.

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Abstract

一种背光模组（2）和液晶显示装置；背光模组（2）通过在柔性电路板（22）远离背板（21）的一侧设置定位结构（25），将定位结构（25）设置发光芯片（23）对应区域（231）外，并通过在光学膜片（24）上设置反定位结构（245），使得发光芯片（23）侧的定位结构（25）能够与反定位结构（245）对应配合，对光学膜片（24）进行定位固定，实现光学膜片（24）的定位的同时减小了背光模组（2）的边框宽度。

Description

背光模组和液晶显示装置 技术领域
本申请涉及显示技术领域，尤其是涉及一种背光模组和液晶显示装置。
 背景技术
当前显示器件为了实现区域调光、高亮度，会采用mini LED（迷你发光二极管）背光代替一般的侧入式背光。现有侧入式背光会通过在下边框上挖槽，在光学膜片上设置凸起，以对光学膜片进行定位，但这种设计会导致侧入式背光的下边框的胶框宽度较大，背光模组的边框宽度较大。而mini LED背光无需侧入式光源，可以使得四周边框较窄，但无法定位光学膜片，因此，现有mini LED背光也会采用侧入式背光的定位方式增加胶框的宽度，以对光学膜片进行定位，但由于这种方式会增加胶框的宽度，导致背光模组的边框宽度较大，无法实现窄边框设计。
所以，现有mini LED背光存在需要增加胶框的宽度进行光学膜片的定位所导致的背光模组的边框较大的技术问题。
 技术问题
本申请实施例提供一种背光模组和液晶显示装置，用以缓解现有mini LED背光存在需要增加胶框的宽度进行光学膜片的定位所导致的背光模组的边框较大的技术问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种背光模组，该背光模组包括：
背板；
柔性电路板，设置于所述背板一侧；
发光芯片，设置于所述柔性电路板远离所述背板的一侧；
光学膜片，设置于所述发光芯片远离所述柔性电路板的一侧；
其中，所述背光模组还包括定位结构，所述定位结构设置于所述柔性电路板远离所述背板的一侧，且所述定位结构设置于所述发光芯片对应区域外，所述定位结构的高度大于或者等于所述光学膜片的最大厚度，所述光学膜片上设有与所述定位结构对应的反定位结构。
在一些实施例中，所述背光模组包括位于所述发光芯片对应区域四周的第一区域、第二区域、第三区域和第四区域；
所述定位结构包括第一定位结构和第二定位结构，所述第一定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的另一个。
在一些实施例中，所述背光模组包括第一区域和第二区域交界的第一角区域、所述第一区域和所述第三区域交界的第二角区域、所述第二区域和所述第四区域交界的第三角区域、所述第三区域和所述第四区域交界的第四角区域，所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的至少一个设有所述定位结构。
在一些实施例中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的另一个。
在一些实施例中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域的非交界区域。
在一些实施例中，所述反定位结构包括第一反定位结构和第二反定位结构，所述光学膜片包括棱镜片和扩散片，所述棱镜片上设有所述第一反定位结构，所述扩散片上设有所述第二反定位结构，所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第二定位结构对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。
在一些实施例中，所述第一定位结构与所述第二定位结构的结构不同，所述光学膜片上的反定位结构与所述第一定位结构和所述第二定位结构中的至少一个对应设置。
在一些实施例中，所述光学膜片包括色转换膜、匀光膜、棱镜片和扩散片，所述色转换膜设置于所述发光芯片与所述匀光膜之间，所述棱镜片设置于所述匀光膜远离所述色转换膜的一侧，所述扩散片设置于所述棱镜片远离所述匀光膜的一侧，所述色转换膜设有第三反定位结构、所述匀光膜设有第四反定位结构、所述棱镜片设有第五反定位结构、所述扩散片设有第六反定位结构；
所述第一定位结构的高度与所述匀光膜的高度相等，所述第二定位结构的高度大于或者等于所述扩散片的高度；
其中，所述第三反定位结构和所述第四反定位结构与所述第一定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和第二反定位结构对应设置；或者所述第三反定位结构和所述第四反定位结构与所述第一定位结构和所述第二定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和所述第二反定位结构对应设置。
在一些实施例中，所述定位结构包括定位柱，所述反定位结构包括与所述定位柱对应的通孔。
在一些实施例中，所述定位结构的材料包括硅胶和二氧化钛。
在一些实施例中，所述背光模组还包括反射结构，所述反射结构设置于所述柔性电路板远离所述背板的一侧，且所述反射结构设置于所述发光芯片之间，所述反射结构的高度大于所述发光芯片的高度、且所述反射结构的高度小于或者等于所述光学膜片的最小厚度。
在一些实施例中，所述反射结构阵列设置于所述发光芯片之间，处于一行反射结构和一列反射结构的交界位置的反射结构的高度与其他反射结构的高度的差值范围为0.05毫米至0.08毫米。
在一些实施例中，所述反射结构包括设置于所述发光芯片之间的第一部分和设置于所述发光芯片对应区域外的第二部分，所述反射结构的第二部分设置于所述定位结构之间，且填充相邻所述定位结构之间的间隙。
同时，本申请实施例提供一种液晶显示装置，该液晶显示装置包括液晶显示面板和背光模组，所述背光模组包括：
背板；
柔性电路板，设置于所述背板一侧；
发光芯片，设置于所述柔性电路板远离所述背板的一侧；
光学膜片，设置于所述发光芯片远离所述柔性电路板的一侧；
其中，所述背光模组还包括定位结构，所述定位结构设置于所述柔性电路板远离所述背板的一侧，且所述定位结构设置于所述发光芯片对应区域外，所述定位结构的高度大于或者等于所述光学膜片的最大厚度，所述光学膜片上设有与所述定位结构对应的反定位结构。
在一些实施例中，所述背光模组包括位于所述发光芯片对应区域四周的第一区域、第二区域、第三区域和第四区域；
所述定位结构包括第一定位结构和第二定位结构，所述第一定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的另一个。
在一些实施例中，所述背光模组包括第一区域和第二区域交界的第一角区域、所述第一区域和所述第三区域交界的第二角区域、所述第二区域和所述第四区域交界的第三角区域、所述第三区域和所述第四区域交界的第四角区域，所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的至少一个设有所述定位结构。
在一些实施例中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的另一个。
在一些实施例中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域的非交界区域。
在一些实施例中，所述反定位结构包括第一反定位结构和第二反定位结构，所述光学膜片包括棱镜片和扩散片，所述棱镜片上设有所述第一反定位结构，所述扩散片上设有所述第二反定位结构，所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第二定位结构对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。
在一些实施例中，所述第一定位结构与所述第二定位结构的结构不同，所述光学膜片上的反定位结构与所述第一定位结构和所述第二定位结构中的至少一个对应设置。
 有益效果
本申请提供一种背光模组和液晶显示装置；该背光模组包括背板、柔性电路板、发光芯片和光学膜片，柔性电路板设置于背板一侧，发光芯片设置于柔性电路板远离背板的一侧，光学膜片设置于发光芯片远离柔性电路板的一侧，其中，背光模组还包括定位结构，定位结构设置于柔性电路板远离背板的一侧，且定位结构设置于发光芯片对应区域外，定位结构的高度大于或者等于光学膜片的最大厚度，光学膜片上设有与定位结构对应的反定位结构。本申请通过在柔性电路板远离背板的一侧设置定位结构，将定位结构设置发光芯片对应区域外，并通过在光学膜片上设置反定位结构，使得发光芯片侧的定位结构能够与反定位结构对应配合，对光学膜片进行定位固定，该设计仅需要在发光芯片侧增加定位结构，而无需增加背光模组的边框的宽度，实现光学膜片的定位的同时减小了背光模组的边框宽度。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为现有液晶显示装置的第一种示意图。
图2为现有液晶显示装置的第二种示意图。
图3为本申请实施例提供的背光模组的第一种示意图。
图4为本申请实施例提供的背光模组的第二种示意图。
图5为本申请实施例提供的背光模组的第三种示意图。
图6为本申请实施例提供的背光模组的第四种示意图。
图7为本申请实施例提供的背光模组的第五种示意图。
图8为本申请实施例提供的背光模组的第六种示意图。
图9为本申请实施例提供的背光模组的第七种示意图。
图10为本申请实施例提供的液晶显示装置的示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1所示，侧入式背光模组包括背板111、反射片112、侧光源113、导光板114、棱镜片115、扩散片116，从图1可以看到，由于需要设置侧光源，使得背光模组的一侧的边框的宽度需要增加，而为了对光学膜片进行定位，如图2所示，会在胶框118上设置凹槽，相应的在光学膜片117上设置凸起，对光学膜片117进行定位和固定，由于需要在胶框上设置凹槽，使得胶框的宽度较大，这会进一步增加背光模组的边框的宽度，导致背光模组的边框较大。而在mini LED背光模组中，为了实现光学膜片的定位，也只能采用侧入式背光模组的定位方式，虽然相较于侧入式背光模组减小了边框，但仍然存在需要增加胶框的宽度导致背光模组的边框宽度较大，无法实现窄边框。所以，现有mini LED背光存在需要增加胶框的宽度进行光学膜片的定位所导致的背光模组的边框较大的技术问题。
本申请实施例针对上述技术问题，提供一种背光模组和液晶显示装置，用以缓解上述技术问题。
如图3、图4、图5所示，本申请实施例提供一种背光模组，该背光模组2包括：
背板21；
柔性电路板22，设置于所述背板21一侧；
发光芯片23，设置于所述柔性电路板22远离所述背板21的一侧；
光学膜片24，设置于所述发光芯片23远离所述柔性电路板22的一侧；
其中，所述背光模组2还包括定位结构25，所述定位结构25设置于所述柔性电路板22远离所述背板21的一侧，且所述定位结构25设置于所述发光芯片23对应区域231外，所述定位结构25的高度大于或者等于所述光学膜片24的最大厚度，所述光学膜片24上设有与所述定位结构25对应的反定位结构245。
本申请实施例提供一种背光模组，该背光模组通过在柔性电路板远离背板的一侧设置定位结构，将定位结构设置发光芯片对应区域外，并通过在光学膜片上设置反定位结构，使得发光芯片侧的定位结构能够与反定位结构对应配合，对光学膜片进行定位固定，该设计仅需要在发光芯片侧增加定位结构，而无需增加背光模组的边框的宽度，实现光学膜片的定位的同时减小了背光模组的边框宽度。
需要说明的是，定位结构的高度是指以背板或者柔性电路板为基准面的高度，光学膜片的最大厚度是指与定位结构的基准面相同时，光学膜片中位于与背板距离最远的膜层的高度，光学膜片的最小厚度是指与定位结构的基准面相同时，光学膜片中位于与背板距离最近的膜层的高度，例如，在图3中，定位结构25的高度是指从柔性电路板22的上表面至扩散片244的上表面之间的距离，光学膜片24的最大厚度是指柔性电路板22的上表面至扩散片244的上表面之间的距离，光学膜片24的最小厚度是指柔性电路板22的上表面与色转换膜241的下表面之间的距离，在下述实施例中不再赘述。
需要说明的是，在图4中，如图4中的（a）所示，在定位结构设置在四个角区域时，光学膜片的四个角区域也会相应设置反定位结构245，如图4中的（b）所示，在定位结构设置在不同区域时，反定位结构245也会包括第一反定位结构245a和第二反定位结构245b，对应设置在定位结构设置位置，以进行定位固定。
在一种实施例中，所述定位结构包括一个。通过设置一个定位结构，使得定位结构与反定位结构配合，从而对光学膜片进行定位。
需要说明的是，本申请通过在发光芯片外围形成定位结构，可以避免定位结构设置在发光芯片之间时，定位结构对应位置无光线，导致显示器件出现暗点问题。
针对单个定位结构无法准确定位的问题。在一种实施例中，所述定位结构包括第一定位结构和第二定位结构。通过设置第一定位结构和第二定位结构，通过至少两个定位结构和光学膜片上的反定位结构配合，提高光学膜片的定位和固定效果。
针对单个定位结构无法准确定位的问题。在一种实施例中，如图5所示，所述背光模组包括位于所述发光芯片23对应区域四周的第一区域311、第二区域312、第三区域313和第四区域314；
所述定位结构25包括第一定位结构251和第二定位结构252，所述第一定位结构251设置于所述第一区域311、所述第二区域312、所述第三区域313和所述第四区域314中的一个，所述第二定位结构252设置于所述第一区域311、所述第二区域312、所述第三区域313和所述第四区域314中的另一个。通过使定位结构包括第一定位结构和第二定位结构，且使得第一定位结构和第二定位结构至少设置在两个区域，从而可以通过不同方向的定位结构对光学膜片进行定位，无需增加背光模组的边框的宽度，且定位效果相较于同一侧的定位结构更好。
需要说明的是，以图5为例，由于第一区域311、第二区域312、第三区313、第四区域314之间会存在重合部分，例如第一区域311和第二区域312会存在重合部分，即第一角区域321，因此，第一区域和第二区域均可以包括第一角区域，或者第一区域包括第一角区域，第二区域不包括第一角区域。
根据上述说明可知，在第一定位结构设置于第一区域、第二区域、所述第三区域和所述第四区域中的一个，第二定位结构设置于所述第一区域、所述第二区域、第三区域和第四区域中的另一个时，会存在第一定位结构和第二定位结构设置在两个区域的重合部分的状态；第一定位结构设置在两个区域的重合部分，第二定位结构设置在两个区域中的一个的状态，以及第一定位结构和第二定位结构设置在两个区域的非交界区域的状态，虽然其中包括第一定位结构和第二定位结构不是设置在两个侧边的状态，由于此时多个定位结构仍然可以提高定位效果，因此，也是本领域的保护范围，在此不再赘述。
针对定位结构设置在侧边时体积较小且影响光学膜片的性能的问题。在一种实施例中，如图5所示，所述背光模组包括第一区域311和第二区域312交界的第一角区域321、所述第一区域311和所述第三区域313交界的第二角区域322、所述第二区域312和所述第四区域314交界的第三角区域323、所述第三区域313和所述第四区域314交界的第四角区域324，所述第一角区域321、所述第二角区域322、所述第三角区域323和所述第四角区域324中的至少一个设有定位结构25。通过在背光模组的第一角区域、第二角区域、第三角区域、第四角区域中的至少一个设置定位结构，将定位结构设置在背光模组的角上，则定位结构的体积可以相应变大，避免定位结构过小导致断裂、定位不准确等问题；相应的光学膜片的反定位结构也可以设置在角上，而由于光线主要由发光芯片对应区域射出，对光学膜片的影响较小且对发光效果的影响较小。
在一种实施例中，如图5所示，所述第一定位结构251设置于第一角区域321、所述第二角区域322、所述第三角区域323和所述第四角区域324中的一个，所述第二定位结构252设置于所述第一角区域321、所述第二角区域322、所述第三角区域323和所述第四角区域324中的另一个。通过将第一定位结构和第二定位结构设置在角区域内，使得在光学膜片与发光芯片贴合时，光学膜片可以通过角区域的定位结构和反定位结构配合定位固定，无需增加背光模组的边框的宽度，且不会对光学膜片对应发光区域的部分形成反定位结构，使光学膜片较为完整，对光线进行处理。
具体的，第一定位结构和第二定位结构设置于背光模组的同一侧的角区域，例如，第一角区域和第二角区域为同一侧的角区域，通过将第一定位结构和第二定位结构设置在同一侧，使得光学膜片与发光芯片贴合时，光学膜片从设有定位结构的一侧进行定位后贴合，实现光学膜片的定位固定。
具体的，第一定位结构和第二定位结构设置于背光模组的对角的角区域，例如，第一角区域和第三角区域为对角的角区域，通过将第一定位结构和第二定位结构设置在对角，首先在光学膜片的贴合时，无论是从上侧、前侧、后侧、左侧还是右侧，均能够捕捉到定位结构进行定位，其次，对角设置定位结构可以稳定的固定光学膜片。
在一种实施例，如图6所示，所述第一定位结构251设置于所述第一角区域321、所述第二角区域322、所述第三角区域323和所述第四角区域324中的一个，所述第二定位结构252设置于所述第一区域311、所述第二区域312、所述第三区域313和所述第四区域314的非交界区域。通过将定位结构分别设置在角区域和各侧边的非交界区域，通过多个区域的定位结构从多个角度对光学膜片进行定位，无需增加背光模组边框的宽度进行定位，提高定位的准确性和固定的稳定性。
在一种实施例中，如图7所示，所述反定位结构245包括第一反定位结构245a和第二反定位结构245b，所述光学膜片24包括棱镜片243和扩散片244，所述棱镜片243上设有第一反定位结构245a，所述扩散片244上设有第二反定位结构245b，所述第一反定位结构245a与所述第一定位结构251和所述第二定位结构252对应，所述第二反定位结构245b与所述第二定位结构252对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。在设置第一反定位结构和第二反定位结构时，可以通过不同的光学膜片与不同位置的定位结构对应设置，提高光学膜片与发光芯片的对位的准确性。
具体的，如图7所示，第一反定位结构245a包括与第一定位结构251对应的第一部分411和与第二定位结构252对应的第二部分412，通过设置不同的结构，以与不同的定位结构对应配合，从而提高光学膜片的对位准确性和固定稳定性。
具体的，在设置定位结构时，对于部分膜层可以与所有的定位结构对应设置，对于部分膜层可以与部分定位结构对应设置，例如图7中以扩散片仅设有与第二定位结构对应的第二反定位结构为例进行了详细说明。但本申请实施例不限于此，例如第二反定位结构也可以与多个定位结构对应设置，第一反定位结构可以与多个定位结构对应设置。
在一种实施例中，如图6、图7所示，所述第一定位结构251与所述第二定位结构252的结构不同，所述光学膜片24上的反定位结构245与所述第一定位结构251和所述第二定位结构252中的至少一个对应设置。通过采用不同结构的定位结构与不同结构的反定位结构配合，提高定位结构的对位效果，且提高定位结构的稳定性。
在一种实施例中，如图3所示，所述光学膜片24包括色转换膜241、匀光膜242、棱镜片243和扩散片244，所述色转换膜241设置于所述发光芯片23与所述匀光膜242之间，所述棱镜片243设置于所述匀光膜242远离所述色转换膜241的一侧，所述扩散片244设置于所述棱镜片243远离所述匀光膜242的一侧，所述色转换膜设有第三反定位结构、所述匀光膜设有第四反定位结构、所述棱镜片设有第五反定位结构、所述扩散片设有第六反定位结构；
所述第一定位结构的高度与所述匀光膜的高度相等，所述第二定位结构的高度大于或者等于所述扩散片的高度；
其中，所述第三反定位结构和所述第四反定位结构与所述第一定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和第二反定位结构对应设置；或者所述第三反定位结构和所述第四反定位结构与所述第一定位结构和所述第二定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和所述第二反定位结构对应设置。通过设置不同形状和不同高度的定位结构，使得不同的光学膜片可以设置不同的反定位结构，使得反定位结构与不同高度、不同形状的定位结构进行配合，通过不同的定位结构实现光学膜片的定位，无需增加背光模组的边框的宽度，且通过不同的定位结构的设计提高光学膜片的定位固定的稳定性。
在一种实施例中，所述定位结构包括定位柱，所述反定位结构包括与所述定位柱对应的通孔。通过在发光芯片侧设置定位柱，在光学膜片上设置通孔，使得在光学膜片与发光芯片配合时，光学膜片上的通孔需要与定位柱配合，光学膜片才能完成贴合，从而使得光学膜片与发光芯片准确定位固定，无需增加背板模组的边框的宽度。
具体的，如图3所示，定位结构的截面形状可以为锥状，实际可以为圆台加圆柱的设置方式，而光学膜片上设置圆孔，由于圆柱和圆孔不存在棱角，避免对光学膜片或者定位结构造成划伤和刮伤，导致光线的损失。但本申请实施例不限于此，例如定位结构可以为长方体、圆柱体、棱台加长方体等结构，在此不再赘述。
在一种实施例中，所述定位结构包括定位柱，所述定位柱上设有过孔，所述反定位结构包括与所述过孔配合的凸起。考虑到光学膜片形成过孔可能导致光线损失的问题，通过使得光学膜片形成凸起，避免光线出现损失，使得定位柱不会超出光学膜片，且光学膜片与定位结构的配合紧密。
具体的，可以在光学膜片中的棱镜片上设置过孔，而在扩散片上设置凸起，在光学膜片和定位结构的配合过程中，定位结构穿过棱镜片的过孔后，定位柱上的过孔与扩散片上的凸起配合，从而完成光学膜片的定位，且避免位于外侧的扩散片能整面设置，对光线进行处理。
针对定位结构设置在发光芯片边缘会吸收光线的问题。在一种实施例中，所述定位柱的材料包括硅胶和二氧化钛。通过采用硅胶和二氧化钛形成定位结构，可以得到白色的定位结构，提高对光线的反射效果，使得光线在发射到定位结构上时，光线会被反射，从而提高正向亮度，避免光线存在损失。
在一种实施例中，所述定位结构包括反射层，所述反射层设置于与所述反定位结构接触的一侧，通过在定位结构中设置反射层，使得光线在照射到定位结构上时，光线可以被反射层反射，从而避免光线存在损失，且反射的光线会经过各光学膜片，使光学膜片对光线进行处理，例如角度调整。
需要说明的是，上述实施例中以定位结构包括第一定位结构和第二定位结构为例进行了详细说明，但本申请实施例不限于此，例如定位结构可以包括位于四周的多个定位结构，且各定位结构的形状、大小、高度均可以根据需求进行设定，具体可以以第一定位结构和第二定位结构的设置方式进行类比设置，本申请实施例不再赘述。
针对光线向外射出时会存在部分光线无法射出的问题。在一种实施例中，如图8所示，所述背光模组还包括反射结构51，所述反射结构51设置于所述柔性电路板22远离所述背板的一侧，且所述反射结构51设置于所述发光芯片23之间，所述反射结构51的高度大于所述发光芯片23的高度、且所述反射结构51的高度小于或者等于所述光学膜片的最小厚度。通过在发光芯片之间设置反射结构，使得光线在向两侧发射时，反射结构可以被光线反射，从而使得光线能够发散到外界，避免光线损失。
在一种实施例中，所述反射结构阵列设置于所述发光芯片之间，处于一行反射结构和一列反射结构的交界位置的反射结构的高度与其他反射结构的高度的差值范围为0.05毫米至0.08毫米。通过使位于交界区域的反射结构与其他位置的反射结构的高度相近甚至相等，避免反射结构顶伤光学膜片，且避免反射结构对光线的控制与预设控制角度不同，导致光线存在损失或者存在光线不均的问题。
具体的，通过在形成反射结构时，控制喷嘴在交界位置的喷墨量，使得在形成横向的反射结构后，在形成纵向的反射结构时，控制喷嘴在交界处不进行喷墨或者少量喷墨，从而使得交界位置的反射结构与其他位置的反射结构的高度相近甚至相等，避免反射结构顶伤光学膜片，且避免反射结构对光线的控制与预设控制角度不同，导致光线存在损失或者存在光线不均的问题。
在一种实施例中，如图9所示，所述反射结构51包括设置于所述发光芯片23之间的第一部分和设置于所述发光芯片23对应区域外的第二部分，所述反射结构51的第二部分设置于所述定位结构25之间，且填充相邻所述定位结构25之间的间隙。通过采用反射结构填充定位结构设置，使得在发光芯片外围四周设置反射结构或者定位结构，使得光线在发散至背光模组外时，可以通过反射结构或者定位结构对光线进行反射，避免光线存在损失。
具体的，如图9所示，以反射结构51和定位结构25采用同种结构或者同种材料形成为例，可以看到反射结构51和定位结构25围绕发光芯片设置，具体反射结构51设置在发光芯片23之间和外围，定位结构25设置在发光芯片外围，使得发光芯片发光的光线会被反射结构和定位柱进行反射，从而提高光线的利用率，避免光线出现损失。
在一种实施例中，所述反射结构包括基材和反射层，所述反射层围绕所述基材设置，通过设置基材和反射层，使得光线在照射到反射结构上时，光线会被反射层反射，从而避免光线出现损失。
在一种实施例中，所述反射结构的材料与所述定位结构的材料相同，通过采用相同的材料形成反射结构和定位结构，使得在光线照射到反射结构和定位结构上时，能够对光线进行反射，避免光线损失，且采用相同的材料形成反射结构和定位结构，可以提高背光模组的制备效率。
具体的，所述反射结构的材料包括硅胶和二氧化钛，采用相同的材料形成定位结构和反射结构，使得在形成定位结构和反射结构时，可以便于对光线的角度进行控制，且可以提高背光模组的制备效率。
需要说明的是，上述实施例中以光学膜片包括色转换膜、匀光膜、棱镜片和扩散片为例进行了详细说明。但本申请实施例不限于此，例如，发光芯片上通过设置荧光膜进行不同颜色的光线的转换，此时可以不设置色转换膜，在本申请实施例中不再赘述。
同时，如图4、图5、图10所示，本申请实施例提供一种液晶显示装置，该液晶显示装置包括液晶显示面板61和背光模组，所述背光模组包括：
背板21；
柔性电路板22，设置于所述背板21一侧；
发光芯片23，设置于所述柔性电路板22远离所述背板21的一侧；
光学膜片24，设置于所述发光芯片23远离所述柔性电路板22的一侧；
其中，所述背光模组2还包括定位结构25，所述定位结构25设置于所述柔性电路板22远离所述背板21的一侧，且所述定位结构25设置于所述发光芯片23对应区域231外，所述定位结构25的高度大于或者等于所述光学膜片24的最大厚度，所述光学膜片24上设有与所述定位结构25对应的反定位结构245。
本申请实施例提供一种液晶显示装置，该液晶显示装置包括液晶显示面板和背光模组，该背光模组通过在柔性电路板远离背板的一侧设置定位结构，将定位结构设置发光芯片对应区域外，并通过在光学膜片上设置反定位结构，使得发光芯片侧的定位结构能够与反定位结构对应配合，对光学膜片进行定位固定，该设计仅需要在发光芯片侧增加定位结构，而无需增加背光模组的边框的宽度，实现光学膜片的定位的同时减小了背光模组的边框宽度。
在一种实施例中，所述液晶显示面板61包括第一基板611、第二基板613和设置于第一基板611和第二基板613之间的液晶层612。
在一种实施例中，在液晶显示装置中，所述背光模组包括位于所述发光芯片对应区域四周的第一区域、第二区域、第三区域和第四区域；
所述定位结构包括第一定位结构和第二定位结构，所述第一定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的另一个。
在一种实施例中，在液晶显示装置中，所述背光模组包括第一区域和第二区域交界的第一角区域、所述第一区域和所述第三区域交界的第二角区域、所述第二区域和所述第四区域交界的第三角区域、所述第三区域和所述第四区域交界的第四角区域，所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的至少一个设有所述定位结构。
在一种实施例中，在液晶显示装置中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的另一个。
在一种实施例中，在液晶显示装置中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域的非交界区域。
在一种实施例中，在液晶显示装置中，所述反定位结构包括第一反定位结构和第二反定位结构，所述光学膜片包括棱镜片和扩散片，所述棱镜片上设有所述第一反定位结构，所述扩散片上设有所述第二反定位结构，所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第二定位结构对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。
在一种实施例中，在液晶显示装置中，所述第一定位结构与所述第二定位结构的结构不同，所述光学膜片上的反定位结构与所述第一定位结构和所述第二定位结构中的至少一个对应设置。
根据以上实施例可知：
本申请实施例提供一种背光模组和液晶显示装置，该背光模组包括背板、柔性电路板、发光芯片和光学膜片，柔性电路板设置于背板一侧，发光芯片设置于柔性电路板远离背板的一侧，光学膜片设置于发光芯片远离柔性电路板的一侧，其中，背光模组还包括定位结构，定位结构设置于柔性电路板远离背板的一侧，且定位结构设置于发光芯片对应区域外，定位结构的高度大于或者等于光学膜片的最大厚度，光学膜片上设有与定位结构对应的反定位结构。本申请通过在柔性电路板远离背板的一侧设置定位结构，将定位结构设置发光芯片对应区域外，并通过在光学膜片上设置反定位结构，使得发光芯片侧的定位结构能够与反定位结构对应配合，对光学膜片进行定位固定，该设计仅需要在发光芯片侧增加定位结构，而无需增加背光模组的边框的宽度，实现光学膜片的定位的同时减小了背光模组的边框宽度。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种背光模组和液晶显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种背光模组，其包括：
    背板；
    柔性电路板，设置于所述背板一侧；
    发光芯片，设置于所述柔性电路板远离所述背板的一侧；
    光学膜片，设置于所述发光芯片远离所述柔性电路板的一侧；
    其中，所述背光模组还包括定位结构，所述定位结构设置于所述柔性电路板远离所述背板的一侧，且所述定位结构设置于所述发光芯片对应区域外，所述定位结构的高度大于或者等于所述光学膜片的最大厚度，所述光学膜片上设有与所述定位结构对应的反定位结构。
  2. 如权利要求1所述的背光模组，其中，所述背光模组包括位于所述发光芯片对应区域四周的第一区域、第二区域、第三区域和第四区域；
    所述定位结构包括第一定位结构和第二定位结构，所述第一定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的另一个。
  3. 如权利要求2所述的背光模组，其中，所述背光模组包括第一区域和第二区域交界的第一角区域、所述第一区域和所述第三区域交界的第二角区域、所述第二区域和所述第四区域交界的第三角区域、所述第三区域和所述第四区域交界的第四角区域，所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的至少一个设有所述定位结构。
  4. 如权利要求3所述的背光模组，其中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的另一个。
  5. 如权利要求3所述的背光模组，其中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域的非交界区域。
  6. 如权利要求5所述的背光模组，其中，所述反定位结构包括第一反定位结构和第二反定位结构，所述光学膜片包括棱镜片和扩散片，所述棱镜片上设有所述第一反定位结构，所述扩散片上设有所述第二反定位结构，所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第二定位结构对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。
  7. 如权利要求2所述的背光模组，其中，所述第一定位结构与所述第二定位结构的结构不同，所述光学膜片上的反定位结构与所述第一定位结构和所述第二定位结构中的至少一个对应设置。
  8. 如权利要求2所述的背光模组，其中，所述光学膜片包括色转换膜、匀光膜、棱镜片和扩散片，所述色转换膜设置于所述发光芯片与所述匀光膜之间，所述棱镜片设置于所述匀光膜远离所述色转换膜的一侧，所述扩散片设置于所述棱镜片远离所述匀光膜的一侧，所述色转换膜设有第三反定位结构、所述匀光膜设有第四反定位结构、所述棱镜片设有第五反定位结构、所述扩散片设有第六反定位结构；
    所述第一定位结构的高度与所述匀光膜的高度相等，所述第二定位结构的高度大于或者等于所述扩散片的高度；
    其中，所述第三反定位结构和所述第四反定位结构与所述第一定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和第二反定位结构对应设置；或者所述第三反定位结构和所述第四反定位结构与所述第一定位结构和所述第二定位结构对应设置，所述第五反定位结构和所述第六反定位结构与所述第一定位结构和所述第二反定位结构对应设置。
  9. 如权利要求1所述的背光模组，其中，所述定位结构包括定位柱，所述反定位结构包括与所述定位柱对应的通孔。
  10. 如权利要求1所述的背光模组，其中，所述定位结构的材料包括硅胶和二氧化钛。
  11. 如权利要求1所述的背光模组，其中，所述背光模组还包括反射结构，所述反射结构设置于所述柔性电路板远离所述背板的一侧，且所述反射结构设置于所述发光芯片之间，所述反射结构的高度大于所述发光芯片的高度、且所述反射结构的高度小于或者等于所述光学膜片的最小厚度。
  12. 如权利要求11所述的背光模组，其中，所述反射结构阵列设置于所述发光芯片之间，处于一行反射结构和一列反射结构的交界位置的反射结构的高度与其他反射结构的高度的差值范围为0.05毫米至0.08毫米。
  13. 如权利要求11所述的背光模组，其中，所述反射结构包括设置于所述发光芯片之间的第一部分和设置于所述发光芯片对应区域外的第二部分，所述反射结构的第二部分设置于所述定位结构之间，且填充相邻所述定位结构之间的间隙。
  14. 一种液晶显示装置，其包括液晶显示面板和背光模组，所述背光模组包括：
    背板；
    柔性电路板，设置于所述背板一侧；
    发光芯片，设置于所述柔性电路板远离所述背板的一侧；
    光学膜片，设置于所述发光芯片远离所述柔性电路板的一侧；
    其中，所述背光模组还包括定位结构，所述定位结构设置于所述柔性电路板远离所述背板的一侧，且所述定位结构设置于所述发光芯片对应区域外，所述定位结构的高度大于或者等于所述光学膜片的最大厚度，所述光学膜片上设有与所述定位结构对应的反定位结构。
  15. 如权利要求14所述的液晶显示装置，其中，所述背光模组包括位于所述发光芯片对应区域四周的第一区域、第二区域、第三区域和第四区域；
    所述定位结构包括第一定位结构和第二定位结构，所述第一定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域中的另一个。
  16. 如权利要求15所述的液晶显示装置，其中，所述背光模组包括第一区域和第二区域交界的第一角区域、所述第一区域和所述第三区域交界的第二角区域、所述第二区域和所述第四区域交界的第三角区域、所述第三区域和所述第四区域交界的第四角区域，所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的至少一个设有所述定位结构。
  17. 如权利要求16所述的液晶显示装置，其中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的另一个。
  18. 如权利要求16所述的液晶显示装置，其中，所述第一定位结构设置于所述第一角区域、所述第二角区域、所述第三角区域和所述第四角区域中的一个，所述第二定位结构设置于所述第一区域、所述第二区域、所述第三区域和所述第四区域的非交界区域。
  19. 如权利要求18所述的液晶显示装置，其中，所述反定位结构包括第一反定位结构和第二反定位结构，所述光学膜片包括棱镜片和扩散片，所述棱镜片上设有所述第一反定位结构，所述扩散片上设有所述第二反定位结构，所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第二定位结构对应；或者所述第一反定位结构与所述第一定位结构和所述第二定位结构对应，所述第二反定位结构与所述第一定位结构和所述第二定位结构对应。
  20. 如权利要求15所述的液晶显示装置，其中，所述第一定位结构与所述第二定位结构的结构不同，所述光学膜片上的反定位结构与所述第一定位结构和所述第二定位结构中的至少一个对应设置。
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