WO2019071691A1 - 液晶显示装置及其背光模块 - Google Patents

液晶显示装置及其背光模块 Download PDF

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Publication number
WO2019071691A1
WO2019071691A1 PCT/CN2017/110091 CN2017110091W WO2019071691A1 WO 2019071691 A1 WO2019071691 A1 WO 2019071691A1 CN 2017110091 W CN2017110091 W CN 2017110091W WO 2019071691 A1 WO2019071691 A1 WO 2019071691A1
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Prior art keywords
light source
optical film
backlight module
liquid crystal
display device
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Ceased
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PCT/CN2017/110091
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English (en)
French (fr)
Inventor
单剑锋
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HKC Co Ltd
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HKC Co Ltd
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Publication of WO2019071691A1 publication Critical patent/WO2019071691A1/zh
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means

Definitions

  • the present application relates to a liquid crystal display device and a backlight module thereof, and more particularly to a liquid crystal display device and a backlight module thereof that reduce ripple generation caused by stress concentration.
  • liquid crystal displays Due to its thin appearance, low power consumption and low radiation pollution, liquid crystal displays are widely used in information products such as mobile phones, notebook computers, personal digital assistants and thin flat-panel TVs, and replace traditional cathode ray tubes (The cathode ray tube (CRT) display has become the mainstream display on the market.
  • CTR cathode ray tube
  • a liquid crystal display includes a liquid crystal display panel and a backlight module.
  • the backlight module carries a plurality of optical films and abuts the liquid crystal display panel to form a complete liquid crystal display.
  • a plurality of optical films are positioned on the back plate of the backlight module.
  • the optical film may have a so-called ripple phenomenon due to stress concentration, and the conventional backlight module is time consuming to assemble and requires an additional alignment step.
  • the purpose of the application is to provide a liquid crystal display device and a backlight module thereof, which can reduce the ripple phenomenon generated on the optical film.
  • the present application provides a backlight module including a backplane, at least one light source assembly, and at least one optical film.
  • the light source assembly has at least one light source and at least one substrate, the light source is disposed on the substrate, and the light source assembly is disposed on the back plate.
  • the optical film has a recessed configuration corresponding to the light source assembly, and whereby the optical film is positioned on the backing plate.
  • the present application also provides a liquid crystal display device including a housing and a backlight module.
  • the backlight module is disposed in the housing.
  • the backlight module includes a back plate, at least one light source component, and at least one optical film.
  • the light source assembly has at least one light source and at least one substrate, the light source is disposed on the substrate, and the light source assembly is disposed on the back plate.
  • the optical film has a recessed configuration corresponding to the light source assembly, and whereby the optical film is positioned on the backing plate.
  • the recessed configuration of the optical film further corresponds to the light source and The substrate.
  • the optical film does not directly contact the light source assembly.
  • the optical film has a gap between at least one inner sidewall of the backsheet.
  • the plurality of optical films are selected from the group consisting of a diffusion sheet, a diamond lens, a brightness enhancement sheet, and a reflective brightness enhancement sheet.
  • the liquid crystal display device and the backlight module thereof of the present application when the optical film of the backlight module is thermally expanded, are not directly pressed by the light source assembly, and are not deformed, and can be mutually coordinated.
  • the configuration is directly positioned on the backplane. That is to say, the gap between the optical film and the light source assembly is used as a spatial buffer so that the optical film does not cause too much deformation or warpage in the plane after thermal expansion to reduce the generation of ripple marks.
  • FIG. 1A is a schematic diagram of a backlight module according to a first embodiment of the present application.
  • FIG. 1B is a schematic exploded view of the backlight module of the first embodiment.
  • 1C and 1D are schematic cross-sectional views of the backlight module of the first embodiment along lines AA and BB, respectively.
  • 1E is a schematic view of a frame in a backlight module of the first embodiment.
  • FIG. 2A is an exploded perspective view of a backlight module of a second embodiment.
  • 2B is an exploded perspective view of the backlight module of the third embodiment.
  • FIG 3 is a schematic exploded view of a liquid crystal display device according to a fourth embodiment of the present application.
  • FIGS. 4A and 4B are schematic views of a liquid crystal display device according to a fifth embodiment of the present application.
  • 4C is a schematic exploded view of the liquid crystal display device of the fifth embodiment.
  • 4D is a schematic cross-sectional view along line AA of the liquid crystal display device of the fifth embodiment.
  • 4E to 4G are schematic views of different support shafts, respectively.
  • FIG. 5A is a schematic diagram of a liquid crystal display device according to a sixth embodiment of the present application.
  • Fig. 5B is a schematic cross-sectional view taken along line BB of the liquid crystal display device of the sixth embodiment.
  • FIG. 6A is a schematic diagram of a liquid crystal display device of a seventh embodiment of the present application.
  • Fig. 6B is a schematic exploded view of the liquid crystal display device of the seventh embodiment.
  • 6C is a schematic view showing the assembly of the middle back frame and the light emitting unit of the liquid crystal display device of the seventh embodiment.
  • Fig. 6D is a partially enlarged schematic view showing the liquid crystal display device of the seventh embodiment.
  • FIG. 7A is a schematic diagram of a liquid crystal display device according to an eighth embodiment of the present application.
  • Fig. 7B is a partially enlarged schematic view showing the liquid crystal display device of the eighth embodiment.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining “first” and “second” may include one or more of the features either explicitly or implicitly.
  • a plurality means two or more unless otherwise stated.
  • the term “comprises” and its variations are intended to cover a non-exclusive inclusion.
  • connection In the description of the present application, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. For those of ordinary skill in the art, the above terms may be understood in the present application. The specific meaning.
  • FIG. 1A is a schematic diagram of an embodiment of a backlight module 20 of the present application.
  • the backlight module 20 generally has a rectangular shape, but the present application is not limited thereto.
  • the symbol "X-Y-Z" in the figure indicates a Cartesian coordinate system of the environment in which the backlight module 20 is located.
  • the main plane of the backlight module 20 is located on the plane XY in the Cartesian coordinate system XYZ, and the short side of the plane of the backlight module 20 is parallel to the X direction, and its long side is parallel to the Y direction; the Z direction is perpendicular to the plane.
  • XY the thickness direction (or height direction) of the backlight module 20 is parallel to the Z direction.
  • the backlight module 20 includes a frame 21 and a plurality of optical films 22 .
  • the frame 21 has a first half frame 211 and a second half frame 212.
  • the first half frame 211 and the second half frame 212 together constitute (and can be said to surround) the accommodating space S.
  • the first half frame 211 and the second half frame 212 are split in the Z direction by the frame 21.
  • each of the first half frame 211 and the second half frame 212 has a rectangular structure surrounded by two long sides and two short sides in the XY plane. As shown in FIG.
  • the first half frame 211 has a first connecting portion 214 in the Z direction
  • the second half frame 212 has a second connecting portion 215 in the Z direction
  • the first connection The portion 214 may be a continuous or discontinuous protruding configuration
  • the second connecting portion 215 has a groove configuration that can cooperate with the first connecting portion 214, and the first connecting portion 214 and the second connecting portion are The 215 is fitted to each other, and the first half frame 211 and the second half frame 212 are combined into a frame 21.
  • the first connecting portion 214 may also be a groove configuration
  • the second connecting portion 215 may have a protruding configuration.
  • the first connecting portion 214 and the second connecting portion 215 are not limited to the above-described configuration types in the present application, as long as the two can be fitted to each other.
  • first half frame 211 and the second half frame 212 described above are connected by the first connecting portion 214
  • the second connecting portions 215 are fitted to each other to be combined with each other to form the frame 21, but this is for illustrative purposes only, and the present application is not limited thereto.
  • the first half frame 211 and the second half frame 212 may also be directly combined by gluing, bonding or bonding to form the frame 21.
  • FIG. 1C is a cross-sectional view of the back frame module 20 of FIG. 1A along the AA line
  • FIG. 1D is a cross-sectional view of the back frame module 20 of FIG. 1A along the BB line.
  • a plurality of optical films 22 are interposed in the accommodating space S of the frame 21.
  • four optical films 221, 222, 223, and 224 are taken as an example, but the present application is not limited thereto.
  • the four optical films 221, 222, 223, and 224 may be independent groups of self-diffusing sheets, diamond lenses, brightness enhancing sheets, and reflective brightness enhancing sheets.
  • the type and number of optical films 22 can be adjusted according to actual needs, and the present application is not limited.
  • the cross section of the frame 21 in the Z direction (i.e., the normal direction of the XY plane of its main plane) generally assumes a C-shaped configuration, in which two of the C-shaped configurations are parallel to the XY plane.
  • the four optical films 221, 222, 223, 224 and at least two inner side walls of the frame 21 are not in direct contact; That is, the four optical films 221, 222, 223, 224 may have a gap between the XY plane and at least two inner sidewalls of the frame 21.
  • the optical films 221, 222, 223, and 224 in the backlight module 20 are thermally expanded, they are not directly deformed by the inner side walls of the frame 21, and the stress is too concentrated. Reduce the resulting ripple effect.
  • the four optical films 221, 222, 223, and 224 are not directly connected to the connecting portion parallel to the Z direction in the C-shaped configuration in both the X direction and the Y direction. That is, the four optical films 221, 222, 223, 224 have a gap G1 and a gap G2 between the X direction and the inner side wall of the frame 21, and a gap between the Y direction and the inner side wall of the frame 21. G3 and gap G4.
  • the XY plane is parallel to the direction of gravity, and the optical films 221, 222, 223, 224 sandwiched in the frame 21 are affected by gravity, and the frame 21 is contacted.
  • At least one of the two inner side walls but because of the dimensional design, at least two of the inner side walls of the frame 21 are not in direct contact with the optical films 221, 222, 223, 224. In this way, even if the backlight module 20 is upright and its main plane is parallel to the gravity side In the case where the optical films 221, 222, 223, and 224 in the backlight module 20 are thermally expanded, they are not directly deformed by the inner side walls of the frame 21, and deformation or stress is excessively concentrated. The resulting ripple effect can be reduced.
  • the first embodiment is described by taking four gaps between the optical films 221, 222, 223, and 224 and the inner side wall of the frame 21, in other embodiments, the number of gaps may also be Actual adjustments are required and are not limited in this application.
  • At least one ear portion 213 may be further disposed on one side of the frame 21, and the ear portion 213 has at least one through hole 2131.
  • the connecting portion parallel to the Z direction in the C-shaped configuration of the frame 21 is provided with two ears 213 on the outer side surface of the accommodating space S, and the two ears 213 are respectively The two short sides of the first half of the frame 211.
  • the position and the number of the ear portions 213 are only exemplified. In other embodiments, the position and the number of the ears 213 can be adjusted and changed according to actual needs, which is not limited in the present application.
  • FIG. 2A is a schematic diagram of an embodiment of a backlight module 20a according to the present application.
  • the backlight module 20a of the present embodiment is substantially the same as the backlight module 20, and includes a frame 21a and a plurality of optical films 22.
  • the frame 21a has a first half frame 211a and a second half frame 212a.
  • the first half frame body 211a and the second half frame body 212a are configured together (and can be said to enclose) the accommodating space S, and the plurality of optical films 22 are interposed in the accommodating space S of the frame 21a, and a plurality of The optical film 22 and the at least two inner side walls of the frame 21a (the side of the C-shaped configuration parallel to the Z-direction connecting portion facing the accommodating space S) are not in direct contact, and may be further formed on one side of the frame 21a.
  • At least one ear portion 213a is provided (this embodiment is an example in which one ear portion 213a is provided on each of the short sides of the first half frame body 211a and the second half frame body 212a).
  • first half frame 211 and the second half frame 212 of the first embodiment are split in the Z direction by the frame 21; and in the second embodiment, the first half frame 211a
  • the second half frame 212a is split in the Y direction by the frame 21a. That is, in the second embodiment, the long side of the frame 21a (parallel to the Y direction) is the extension of the first half frame 211a in the Y direction and the second half frame 212a in the Y direction.
  • the extension segment is composed of a combination.
  • the extension of the first half frame 211a in the Y direction has a first connecting portion 214a
  • the second half frame 212a has a second connecting portion 215a on the corresponding extending portion in the Y direction.
  • the connecting portion 214a and the second connecting portion 215a are fitted to each other, and the first half frame 211a and the second half frame 212a are combined into a frame 21a.
  • the backlight module 20a of the present embodiment has the same composition and change state as the other components. It is described in the embodiment, and details are not described herein again.
  • FIG. 2B is a schematic diagram of an embodiment of a backlight module 20b according to the present application.
  • the backlight module 20b of the present embodiment is substantially the same as the backlight module 20, and includes a frame 21b and a plurality of optical films 22.
  • the frame 21b has a first half frame 211b and a second half frame 212b.
  • the first half frame body 211b and the second half frame body 212b are configured together (also can be said to enclose) the accommodating space S, and the plurality of optical films 22 are interposed in the accommodating space S of the frame 21b, and a plurality of The optical film 22 and the at least two inner side walls of the frame 21b (the side of the C-shaped configuration parallel to the Z-direction connecting portion facing the accommodating space S) are not in direct contact, and may be further formed on one side of the frame 21b.
  • At least one ear portion 213b is provided (this embodiment is an example in which one ear portion 213b is provided on each of two side edges of the first half frame body 211b parallel to the X direction).
  • first half frame 211 and the second half frame 212 of the first embodiment are split in the Z direction by the frame 21; and in the third embodiment, the first half frame 211b
  • the second half frame 212b is split in the X direction by the frame 21a. That is, in the third embodiment, the short side of the frame 21b (parallel to the X direction) is the extension of the first half frame 211b in the X direction and the second half frame 212b in the X direction.
  • the extension segment is composed of a combination.
  • the extension of the first half frame 211b in the X direction has a first connecting portion 214b, and the second half frame 212b has a second connecting portion 215b on the corresponding extension in the X direction, and by the first The connecting portion 214b and the second connecting portion 215b are fitted to each other, and the first half frame 211b and the second half frame 212b are combined into a frame 21b.
  • the backlight module 20b of the present embodiment has the same structural and structural changes as the other components. It is described in the embodiment, and details are not described herein again.
  • FIG. 3 is a schematic diagram of a liquid crystal display device 2 of the present application.
  • the liquid crystal display device 2 includes a back plate 24 and a backlight module 20, and the backlight module 20 is disposed on the back plate 24.
  • the liquid crystal display device 2 of the present embodiment is a side light source, and the light source is an example of a light emitting diode.
  • the liquid crystal display device of the present application may also be a direct light source, and the light source may also be a cold cathode ray tube (CCFL), which is not limited in the application.
  • a light source module 25 is disposed on each of the inner side walls (XZ plane and YZ plane) of the back plate 24.
  • the light source module 25 includes a plurality of light sources 251 and a substrate 252 carrying a plurality of light sources 251.
  • the light source 251 herein is a light emitting diode.
  • a light guide plate 23 is further disposed between the backlight module 20 and the back plate 24, so that the point light source of the light source 251 can be turned into a surface light source (XY plane) in the Z direction by the guiding of the light guide plate 23. It is emitted as a backlight source for display of the liquid crystal display device 2.
  • the liquid crystal module including the control circuit and the outer frame portion of the liquid crystal display device are not shown in the embodiment, but those skilled in the art should know that the aforementioned liquid crystal module is in the Z.
  • the upper portion of the backlight module 20 is stacked on the upper side, and the outer frame portion (or the outer casing) is used to frame the liquid crystal module, the backlight module 20 and the light guide plate 23 together with the back plate 24.
  • the fourth embodiment is described by taking the liquid crystal display device 2 as the backlight module 20 described in the first embodiment as an example.
  • the backlight module of the liquid crystal display device 2 may also be the backlight module 20a, 20b described in the second embodiment or the third embodiment, and the present application is not limited thereto. Therefore, the backlight module 20 includes the frame 21 and the plurality of optical films 22 as well.
  • the frame 21 has a first half frame 211 and a second half frame 212.
  • the first half frame 211 and the second half frame 212 are combined (also can be said to enclose) the accommodating space S, and the plurality of optical films 22 are interposed in the accommodating space S of the frame 21, and a plurality of The optical film 22 is not in direct contact with at least two inner side walls of the frame 21 (the side of the C-shaped configuration parallel to the Z-direction connecting portion facing the accommodating space S).
  • the optical films 221, 222, 223, and 224 in the backlight module 20 are thermally expanded, they are not directly deformed by the inner side walls of the frame 21, and the stress is too concentrated. Reduce the resulting ripple effect.
  • At least one ear portion 213 may be further disposed on one side of the frame 21, and the embodiment is formed on each of the two short sides of the first half frame.
  • An ear portion 213a is provided as an example.
  • Each ear 213 has at least one perforation 2131.
  • two positioning pins 241 are further disposed on the bottom plate 242 of the back plate 24, respectively corresponding to the through holes 2131 of the two ear portions 213. When assembled, the positioning pin 241 will pierce the ear 213 via the through hole 2131, whereby the frame 21 will be positioned on the back plate 24.
  • the frame 21 is positioned by the ear portion 213 and the positioning pin 241, so the stress is only generated between the ear portion 213 and the positioning pin 241 at most, and the positioning pin 241 and the ear portion 213 are placed therein.
  • the stress generated between the two does not affect the optical film 22 to cause waviness.
  • FIG. 4A and FIG. 4B are schematic diagrams of an embodiment of a backlight module 30 and a liquid crystal display device 3 of the present application.
  • the liquid crystal display device 3 includes a housing F and a backlight module 30.
  • the backlight module 30 is disposed on the housing F. Similar to the foregoing embodiment, for the sake of simplicity of the drawing, the light source module and the liquid crystal module portion including the control circuit are not shown in the embodiment, but those skilled in the art should know that the light source module is disposed at
  • the liquid crystal module is stacked on the upper layer of the backlight module 30, and the housing F is framed with the liquid crystal module, the backlight module 30 and the light guide plate 33 together with the back plate 34.
  • the light source type of the liquid crystal display device 2 of the present embodiment may be a side light source or a direct type, and the light source may be a light emitting diode or a cold cathode ray tube (CCFL), which is not limited herein.
  • CCFL cold cathode ray tube
  • the backlight module 30 includes a back plate 34 and at least one optical film.
  • the optical module group 32 including the four optical films 321 , 322 , 323 , and 324 of the backlight module 30 is taken as an example for description.
  • the number of optical diaphragms can be adjusted according to actual needs, which is not limited in this application.
  • the backing plate 34 has at least one support assembly. As shown in the figures, the support assembly is disposed on the bottom plate 342 of the backing plate 34.
  • the support assembly has a support shaft P1 and a plurality of fin configurations PF1 that are connected and ringed outside the support shaft P1.
  • the optical film set 32 has at least one through hole 32H, and the opening position of the through hole 32H corresponds to the position of the support member on the back plate 34.
  • the support assembly i.e., the support shaft P1 and the plurality of fin structures PF1 disposed outside thereof
  • the portion of the light guide plate 33 corresponding to the support assembly is also provided with a through hole 33H. Therefore, the support assembly of the embodiment is a through hole 32H through which the optical film group 32 is disposed and a through hole 33H of the light guide plate 33.
  • the four optical films 321 , 322 , 323 , 324 may be a group of independent self-diffusion sheets, diamond lenses, brightness enhancement sheets, and reflective brightness enhancement sheets.
  • the type and number of optical films 32 can be adjusted according to actual needs, and the present application is not limited thereto.
  • FIG. 4D is a cross-sectional view of the liquid crystal display device of FIG. 4A along line AA.
  • the inner side walls of the perforations 32H of the optical film group 32 are only in contact with the fin structure PF1. That is, the inner side walls of the perforations 32H of the optical film group 32 are not directly in contact with the support shaft P1.
  • the through hole 32H becomes smaller, and the inner side wall thereof is only pressed to the fin structure PF1 at most, and does not directly contact the hard support shaft P1. .
  • the fin structure PF1 is softer in material and higher in flexibility than the optical film group 32 and the support shaft P1.
  • the material of the fin structure PF1 may be sponge, silica gel, or soft rubber (the main material is polyvinyl chloride), or any combination of the foregoing materials.
  • the fin structures PF1 are connected in a symmetrical manner and are disposed outside the support shaft P1, and the number thereof may be 3, 4, 5 or 6 pieces.
  • the setting and setting of the fin structure can be adjusted according to actual needs, and the present application is not limited thereto.
  • FIG. 5A to FIG. 5B are schematic diagrams of an embodiment of a liquid crystal display device 3 a and a backlight module 30 a thereof according to the present application.
  • the liquid crystal display device 3a and the backlight module 30a of the present embodiment are substantially the same as the liquid crystal display device 3 and the backlight module 30 of the fifth embodiment described above.
  • the liquid crystal display device 3a also includes a housing and a backlight module 30a.
  • the backlight module 30a is disposed in the housing.
  • the backlight module 30a includes a back plate 34a, a light guide plate 33a, and an optical film group 32a (including optical films 321a, 322a, 323a, 324a).
  • the housing is not shown in this embodiment for the sake of brevity.
  • the support assembly is disposed on the bottom plate 342 of the backing plate 34.
  • the bottom plate 342a of the back plate 34a of the present embodiment is provided with two support assemblies, and the two support assemblies respectively have support shafts P1, P2 and a plurality of fin structures PF1, PF2.
  • the plurality of fin structures PF1 are connected and ringed outside the support shaft P1.
  • the fin structure PF2 is connected and looped outside the support shaft P2.
  • the optical film group 32a has two through holes 32Ha and 32Hb, and the opening position of the through hole 32Ha corresponds to the position of the support shaft P1 on the back plate 34a, and the opening position of the through hole 32Hb corresponds to the position of the support shaft P2 on the back plate 34a.
  • the line connecting the center points of the perforations 32Ha and the perforations 32Hb (BB lines) is through the center point C of the optical film set 32a.
  • the "center point” referred to herein is the geometric center point of the two-dimensional configuration in which the perforations 32Ha, 32Hb and the optical film group 32a are each presented on the main plane of the liquid crystal display device 3a.
  • FIG. 5B is a cross-sectional view of the liquid crystal display device of FIG. 5A along line BB.
  • the inner sidewalls of the through holes 32Ha and 32Hb of the optical film group 32a are only in contact with the fin structure PF1 and the fin structure PF2, respectively. That is, the inner side walls of the perforations 32Ha and 32Hb of the optical film group 32a are not directly in contact with the support shafts P1, P2.
  • the center of gravity generally passes through the center point of the optical film set 32a, so this design is adopted (the line connecting the center points of the perforations 32Ha and the perforations 32Hb through the center point of the optical film group 32a)
  • the liquid crystal display device 3a is relatively stable when it is erected, and it is not easy to cause a phenomenon in which stress is concentrated too much.
  • the optical film group 32a of the backlight module is thermally expanded, the through holes 32Ha and 32Hb become smaller, and the inner side walls are only pressed to the fin structure PF1 and the fin structure PF2 at most, and the direct contact is hard. Support shaft, P2.
  • liquid crystal display device and backlight module liquid crystal display device and backlight module
  • FIG. 6A is a schematic diagram of a liquid crystal display device 4 and a backlight module 40 thereof according to the present application. Please refer to FIG. 6A to FIG. 6D, wherein FIG. 6C is a schematic diagram showing that the liquid crystal display device 4 has not been provided with the optical film and the light guide plate, and FIG. 6D is an enlarged schematic view showing the upper right corner portion of the liquid crystal display device 4 of FIG. 6A.
  • the liquid crystal display device 4 includes a housing and a backlight module 40.
  • the backlight module 40 is disposed in the housing.
  • the housing and the liquid crystal module portion including the control circuit are not shown in the embodiment, but those skilled in the art should know that the aforementioned liquid crystal module is The liquid crystal module, the backlight module 40, and the light guide plate 43 are framed together with the back plate 44 in the upper layer of the backlight module 40.
  • the liquid crystal display device 4 of the present embodiment is a side light type light source, and the light source is an example of a light emitting diode.
  • the backlight module 40 includes a back plate 44, at least one light source assembly 45, and at least one optical film 42.
  • the light source assembly 45 has at least one light source 451 and at least one substrate 452.
  • the light source 451 is disposed on the substrate 452, and the light source assembly 45 is disposed on the back plate 44.
  • a light source assembly 45 is disposed on each of the inner side walls (XZ plane and YZ plane) of the backing plate 44.
  • the light source assembly 45 includes a plurality of light sources 451 and a substrate 452 carrying a plurality of light sources 451.
  • the light source 451 herein is a light emitting diode.
  • a light guide plate 43 is further disposed between the optical film 42 and the bottom portion 442 of the back plate 44.
  • the point light source of the light source 451 can be turned into a surface light source (XY plane) by the guiding of the light guide plate 43.
  • the form is emitted in the Z direction as a backlight source for display of the liquid crystal display device 4.
  • the optical film 42 is illustrated as an example, but the application is not limited thereto.
  • the optical film 42 may be a diffusion sheet, a diamond lens, a brightness enhancement sheet, or a reflective brightness enhancement sheet.
  • the optical film 42 has a recessed configuration corresponding to the light source assembly 45. Also, the optical film 42 is positioned on the backing plate 44 by these recessed configurations. In detail, the four sides of the optical film 42 on the XY plane have a corresponding recessed configuration corresponding to each of the light source 451 and the substrate 452; and the optical film 42 does not directly contact the light source assembly 45. As shown in the figure, a gap G1 exists between the optical film 42 and the light source 451, and a gap G2 exists between the substrate 452 and the substrate 452 in the X direction, and a gap G3 exists between the substrate 452 and the substrate 452. Additionally, in the preferred case, there is also a gap between the optical film 42 and at least one inner sidewall of the backing plate 44.
  • the optical film 42 can be simply positioned and disposed in the backlight module 40.
  • the optical film 42 is thermally expanded, it is not directly pressed by the inner side wall of the back plate 44 and/or the light source assembly 45. That is to say, with the gap between the optical film 42 and the light source assembly 45 and even the back plate 44 as a spatial buffer, the optical film 42 does not cause too much deformation or warpage on the plane when thermal expansion occurs. Qu, to reduce the occurrence of ripple marks.
  • FIG. 7A is a schematic diagram of a liquid crystal display device 4a and its backlight module 40a of the present application
  • FIG. 7B is an enlarged schematic view showing a corner portion of the upper right corner of the liquid crystal display device 4a of FIG. 7A
  • the liquid crystal display device 4a and the backlight module 40a of the present embodiment are substantially the same as the liquid crystal display device 4 and the backlight module 40 of the seventh embodiment.
  • the liquid crystal display device 4a also includes a housing and a backlight module 40a.
  • the backlight module 40a is disposed in the housing. Similar to the foregoing embodiment, for the sake of simplicity of the drawing, the housing and the liquid crystal module portion including the control circuit are not shown in this embodiment.
  • the backlight module 40a includes a back plate 44a, at least one light source assembly 45a, and at least one optical film 42a.
  • the light source unit 45a has at least one light source 451a and at least one substrate 452a.
  • the light source 451a is disposed on the substrate 452a, and the light source assembly 45a is disposed on the back plate 44a.
  • the optical film 42a has a recessed configuration corresponding to the light source assembly 45a. Also, the optical film 42a is positioned on the back plate 44a by these recessed configurations.
  • the difference from the liquid crystal display device 4 and the backlight module 40 in the seventh embodiment described above is that
  • the concave configuration of the optical film 42a of the eighth embodiment corresponding to the light source assembly 45a no longer corresponds to each of the light sources 451a, but the light source assembly 45a as a whole has a configurational correspondence.
  • the optical film 42 has a concave configuration for each of the light sources 451, but in the present embodiment, as shown in Fig. 7B, the optical film 42a is on the X side and Y.
  • the concave configuration on the side of the direction corresponds to only the entire light source assembly 45a.
  • Such a design is relatively simple, and the manufacturing process and manufacturing cost of the optical film 42a can be further reduced.

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Abstract

一种液晶显示装置(4)及其背光模块(40)。背光模块包括一背板(41)、至少一光源组件(45)以及至少一光学膜片(42)。光源组件(45)具有至少一光源(451)及至少一基板(452)，光源(451)是设置在基板(452)上。光源组件(45)是设置在背板(44)上。光学膜片(45)具有对应于光源组件(45)的凹陷构型，且藉此光学膜片(42)定位设置在背板(44)上。从而，可降低因应力集中及/或热涨冷缩所导致在光学膜片(42)上所发生的波纹现象。

Description

液晶显示装置及其背光模块 技术领域
本申请关于一种液晶显示装置及其背光模块，特别关于一种降低应力集中所导致的波纹产生的液晶显示装置及其背光模块。
背景技术
液晶显示器由于具有外型轻薄、耗电量少及低幅射污染等特性，因此广泛应用于手机、笔记型电脑、个人数位助理与薄型化平面电视等资讯产品上，并取代传统阴极射线管(cathode ray tube，CRT)显示器，成为市面上主流之显示器。
一般而言，液晶显示器包含有一液晶显示面板及一背光模块，其中背光模块承载复数光学膜片并与液晶显示面板抵接，而成为一完整之液晶显示器。对于习知的液晶显示设备来说，会将多个光学膜片定位设置在背光模块的背板上。但是须注意的是，光学膜片有可能会因应力集中而产生所谓的波纹现象，并且传统的背光模块在组装上较为耗时，也需要额外的对位步骤。
发明内容
有鉴于先前技术的不足，发明人经研发后得本申请。本申请的目的为提供一种液晶显示装置及其背光模块，可降低在光学膜片上所产生的波纹现象。
本申请提出一种背光模块，包括一背板、至少一光源组件以及至少一光学膜片。光源组件具有至少一光源及至少一基板，光源是设置在基板上，而光源组件是设置在背板上。光学膜片具有对应于光源组件的凹陷构型，且藉此光学膜片定位设置在所述背板上。
本申请也提出一种液晶显示装置，包括一壳体以及一背光模块。背光模块设置于壳体。背光模块包括一背板、至少一光源组件以及至少一光学膜片。光源组件具有至少一光源及至少一基板，光源是设置在基板上，而光源组件是设置在背板上。光学膜片具有对应于光源组件的凹陷构型，且藉此光学膜片定位设置在所述背板上。
在一实施例中，所述光学膜片的所述凹陷构型进一步对应于所述光源及 所述基板。
在一实施例中，所述光学膜片不直接接触所述光源组件。
在一实施例中，所述光学膜片与所述背板的至少一内侧壁之间具有一间隙。
在一实施例中，所述多个光学膜片是选自由扩散片、菱镜片、增亮片，及反射式增亮片所组成的群组。
综上所述，本申请的液晶显示装置及其背光模块，当背光模块的光学膜片发生热膨胀的情况时，不会直接受到光源组件的挤压，不致产生形变，且同时可以藉由互相配合的构型直接定位设置在背板上。也就是说，以光学膜片与光源组件之间的间隙作为空间上的缓冲，使光学膜片在热膨胀之后不致产生太大的形变或平面上的翘曲，以降低波纹痕迹的产生。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，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的前提下，还可以根据这些附图示出的结构获得其他的附图。在附图中：
图1A为本申请的第一实施例的一种背光模块的示意图。
图1B为第一实施例的背光模块的爆炸示意图。
图1C及图1D分别为第一实施例的背光模块沿AA线及BB线的剖面示意图。
图1E为第一实施例的背光模块中框架的示意图。
图2A为第二实施例的背光模块的分解示意图。
图2B为第三实施例的背光模块的分解示意图。
图3为本申请的第四实施例的一种液晶显示装置的爆炸示意图。
图4A及图4B为本申请的第五实施例的一种液晶显示装置的示意图。
图4C为第五实施例的液晶显示装置的爆炸示意图。
图4D为第五实施例的液晶显示装置的沿AA线的剖面示意图。
图4E至图4G分别为不同态样的支撑轴的示意图。
图5A为本申请的第六实施例的一种液晶显示装置的示意图。
图5B为第六实施例的液晶显示装置的沿BB线的剖面示意图。
图6A为本申请的第七实施例的一种液晶显示装置的示意图。
图6B为第七实施例的液晶显示装置的爆炸示意图。
图6C为第七实施例的液晶显示装置的中背框与发光单元的组装示意图。
图6D为第七实施例的液晶显示装置的部分放大示意图。
图7A为本申请的第八实施例的一种液晶显示装置的示意图。
图7B为第八实施例的液晶显示装置的部分放大示意图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
这里所公开的具体结构和功能细节仅仅是代表性的，并且是用于描述本申请的示例性实施例的目的。但是本申请可以通过许多替换形式来具体实现，并且不应当被解释成仅仅受限于这里所阐述的实施例。
在本申请的描述中，需要理解的是，术语“中心”、“横向”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。另外，术语“包括”及其任何变形，意图在于覆盖不排他的包含。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的 具体含义。
这里所使用的术语仅仅是为了描述具体实施例而不意图限制示例性实施例。除非上下文明确地另有所指，否则这里所使用的单数形式“一个”、“一项”还意图包括复数。还应当理解的是，这里所使用的术语“包括”和/或“包含”规定所陈述的特征、整数、步骤、操作、单元和/或组件的存在，而不排除存在或添加一个或更多其他特征、整数、步骤、操作、单元、组件和/或其组合。
以下将参照相关图式，说明依本申请较佳实施例的液晶显示装置及其背光模块，其中相同的元件将以相同的参照符号加以说明。
第一实施例：背光模块
图1A为本申请的一种背光模块20的一实施例的示意图。在本第一实施例中，背光模块20大致呈现矩形，但本申请并不以此为限。而图中符号"X-Y-Z"系表示背光模块20所在环境的直角坐标系统。如图中所示，背光模块20的主要平面系位于直角坐标系统X-Y-Z中之平面XY上，背光模块20平面的短边平行于X方向，其长边平行于Y方向；Z方向则垂直于平面XY，背光模块20的厚度方向(或称高度方向)则平行于Z方向。
请同时参考图1A、1B及1E。背光模块20包括框架21及多个光学膜片22。框架21具有第一半框体211与第二半框体212。第一半框体211与第二半框体212共同构成(也可以说是围出)容置空间S。如图所示，第一半框体211与第二半框体212是以框架21在Z方向上拆分。如图1B中所示，第一半框体211与第二半框体212各自在XY平面上都有由两个长边及两个短边所围成的矩形结构。如图2E所示，第一半框体211在Z方向上具有第一连接部214，第二半框体212在Z方向上则具有第二连接部215；在本实施例中，第一连接部214可以是连续或不连续的突出构型，而第二连接部215则是具有可以与第一连接部214互相配合的凹沟构型，而藉由第一连接部214与第二连接部215彼此嵌合，第一半框体211与第二半框体212则组合成框架21。此外，在其他的实施态样中，第一连接部214也可以是凹沟构型，第二连接部215则会对应具有突出构型。然而，第一连接部214及第二连接部215在本申请中并不限制于前述的构型种类，只要两者可以是互相搭配彼此嵌合即可。
此外，上述的第一半框体211与第二半框体212虽然是藉由第一连接部214 与第二连接部215彼此嵌合来互相组合成框架21，但这只是用来举例说明，本申请并不以此为限。在其他的实施态样中，第一半框体211与第二半框体212也可以直接用胶合、贴合或黏合的方式，来组成框架21。
请再同时参考图1C及图1D，图1C是图1A的背框模块20沿着AA线的剖面示意图，而图1D则是图1A的背框模块20沿着BB线的剖面示意图。如图中所示，多个光学膜片22是夹设在框架21的容置空间S中。本实施例中，是以具有四片光学膜片221、222、223、224为例进行说明，但本申请并不以此为限。而四片光学膜片221、222、223、224可以是各自独立的选择自扩散片、菱镜片、增亮片，及反射式增亮片所组成的群组。在其他的实施态样中，光学膜片22的种类及数量皆可按照实际需求进行调整，本申请案并不加以限制。
如图中所示，框架21在Z方向(亦即其主要所在平面XY平面的法线方向)上的剖面，大致呈现一个C形构型，藉由C形构型中两个平行于XY平面的延伸段，将四片光学膜片221、222、223、224在Z方向上限制在容置空间S中；另外，藉由C形构型中平行于Z方向的连接部(所述连接部连接前面提到的C形构型中两个平行于XY平面的延伸段)，将四片光学膜片221、222、223、224在X方向及Y方向上限制在容置空间S中。但是四片光学膜片221、222、223、224与框架21的至少两个内侧壁(C形构型中平行于Z方向的连接部朝向容置空间S的那一面)，不直接接触；也就是说，四片光学膜片221、222、223、224在XY平面上与框架21的至少两个内侧壁之间会具有间隙。如此一来，当背光模块20中的光学膜片221、222、223、224发生热膨胀的情况时，不致直接受到框架21内侧壁的挤压而产生变形或是发生应力太过集中的现象，可以降低因此而产生的波纹效应。而在本实施例中，如图中所示，四片光学膜片221、222、223、224不论是在X方向及Y方向上都与C形构型中平行于Z方向的连接部不直接接触；也就是说，四片光学膜片221、222、223、224在X方向与框架21的内侧壁之间具有间隙G1及间隙G2，而在Y方向与框架21的内侧壁之间具有间隙G3及间隙G4。在这种情况下，当背光模块20直立起来之后，使XY平面平行于重力方向，此时夹设在框架21之中的光学膜片221、222、223、224受到重力影响，会接触框架21的至少一个到二个内侧壁，但是因为尺寸设计的关系，仍至少有两个框架21的内侧壁不会与光学膜片221、222、223、224直接接触。如此一来，即便在背光模块20是直立而其主要平面平行于重力方 向时，当背光模块20中的光学膜片221、222、223、224发生热膨胀的情况，也不致直接受到框架21内侧壁的挤压而产生变形或是发生应力太过集中的现象，藉此可以降低因此而产生的波纹效应。虽然本第一实施例中是以光学膜片221、222、223、224与框架21的内侧壁之间具有四个间隙为例加以说明，但是在其他实施态样中，间隙的数量也可依照实际需要进行调整，本申请并不加以限制。
另外，如图1A所示，为了要方便背框模块20在液晶显示设备的组装，在框架21的其中一个侧面上可以进一步设置有至少一个耳部213，而耳部213具有至少一个穿孔2131。在本实施例中，是框架21的C形构型中平行于Z方向的连接部相对于容置空间S的外侧表面上设置有两个耳部213，这两个耳部213则分别为于第一半框体211的两个短边上。然而，前述耳部213的设置位置与数量则仅是举例说明，在其他实施态样中，也可依照实际需要进行调整及改变耳部213的设置位置及数量，本申请并不加以限制。
第二实施例：背光模块
请参考图2A，图2A为本申请的一种背光模块20a的一实施例的示意图。本实施例的背光模块20a大致与背光模块20相同，也是包括有框架21a及多个光学膜片22。框架21a具有第一半框体211a与第二半框体212a。第一半框体211a与第二半框体212a共同构成(也可以说是围出)容置空间S，多个光学膜片22是夹设在框架21a的容置空间S中，且多个光学膜片22与框架21a的至少两个内侧壁(C形构型中平行于Z方向的连接部朝向容置空间S的那一面)不直接接触，也在框架21a的其中一个侧面上可以进一步设置有至少一个耳部213a(本实施例是以于第一半框体211a及第二半框体212a的短边上各设置有一个耳部213a为例)。两者不同处在于，第一实施例的第一半框体211与第二半框体212是以框架21在Z方向上拆分；而在本第二实施例中，第一半框体211a与第二半框体212a是以框架21a在Y方向上拆分。也就是说，在本第二实施例中，框架21a的长边(平行于Y方向)是由第一半框体211a在Y方向上的延伸段与第二半框体212a在Y方向上的延伸段组合构成。而第一半框体211a在Y方向上的延伸段具有第一连接部214a，第二半框体212a则对应的Y方向上的延伸段上则具有第二连接部215a，而藉由第一连接部214a与第二连接部215a彼此嵌合，第一半框体211a与第二半框体212a则组合成框架21a。
此外，本实施例的背光模块20a除了上述与第一实施例的背光模块20所述的差异与对应变化之外，其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
第三实施例：背光模块
请参考图2B，图2B为本申请的一种背光模块20b的一实施例的示意图。本实施例的背光模块20b大致与背光模块20相同，也是包括有框架21b及多个光学膜片22。框架21b具有第一半框体211b与第二半框体212b。第一半框体211b与第二半框体212b共同构成(也可以说是围出)容置空间S，多个光学膜片22是夹设在框架21b的容置空间S中，且多个光学膜片22与框架21b的至少两个内侧壁(C形构型中平行于Z方向的连接部朝向容置空间S的那一面)不直接接触，也在框架21b的其中一个侧面上可以进一步设置有至少一个耳部213b(本实施例是以于第一半框体211b的平行于X方向的两个侧边上各设置有一个耳部213b为例)。两者不同处在于，第一实施例的第一半框体211与第二半框体212是以框架21在Z方向上拆分；而在本第三实施例中，第一半框体211b与第二半框体212b是以框架21a在X方向上拆分。也就是说，在本第三实施例中，框架21b的短边(平行于X方向)是由第一半框体211b在X方向上的延伸段与第二半框体212b在X方向上的延伸段组合构成。而第一半框体211b在X方向上的延伸段具有第一连接部214b，第二半框体212b则对应的X方向上的延伸段上则具有第二连接部215b，而藉由第一连接部214b与第二连接部215b彼此嵌合，第一半框体211b与第二半框体212b则组合成框架21b。
此外，本实施例的背光模块20b除了上述与第一实施例的背光模块20所述的差异与对应变化之外，其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
第四实施例：液晶显示装置
图3为本申请的一种液晶显示装置2的示意图。液晶显示装置2包括背板24以及背光模块20，背光模块20是设置在背板24上。本实施例的液晶显示装置2是以侧光式光源，而发光光源则是以发光二极管为例进行说明。但是，在其他的实施态样中，本申请的液晶显示装置也可以是采用直下式光源，而发光光源也可以采用冷阴极射线管(CCFL)，本申请并不加以限制。如图所示，在背板24的四周内侧壁(XZ平面及YZ平面)上各自设置有一个光源模块25。 光源模块25包括多个光源251以及承载有多个光源251的基板252。如前所述，这里的光源251是发光二极管。而在背光模块20以及背板24之间，进一步设置有导光板23，如此一来，光源251的点光源可以藉由导光板23的引导而变成面光源(XY平面)的形式向Z方向发出，作为液晶显示装置2显示用的背光光源。而为了图面简洁，本实施例中并没有画出包含有控制电路的液晶模块以及液晶显示装置的外框部分，但是本技术领域具有通常知识的技术人员都应该知道前述的液晶模块是在Z方上迭置在背光模块20的上层，而外框部分(或称壳体)则是与背板24共同框住液晶模块、背光模块20及导光板23。
本第四实施例是以液晶显示装置2包括有第一实施例中所述的背光模块20为例进行说明。但是在其他的实施态样中，液晶显示装置2的背光模块也可以是第二实施例或是第三实施例中所述的背光模块20a、20b，本申请并不限制。因此同样地，背光模块20包括有框架21及多个光学膜片22。框架21具有第一半框体211与第二半框体212。第一半框体211与第二半框体212共同构成(也可以说是围出)容置空间S，多个光学膜片22是夹设在框架21的容置空间S中，且多个光学膜片22与框架21的至少两个内侧壁(C形构型中平行于Z方向的连接部朝向容置空间S的那一面)不直接接触。如此一来，当背光模块20中的光学膜片221、222、223、224发生热膨胀的情况时，不致直接受到框架21内侧壁的挤压而产生变形或是发生应力太过集中的现象，可以降低因此而产生的波纹效应。
此外，为了方便框架20与背板24的定位设置，在框架21的其中一个侧面上可以进一步设置有至少一个耳部213，本实施例是以于第一半框体的两个短边上各设置有一个耳部213a为例。而各个耳部213具有至少一个穿孔2131。在本实施例中，在背板24的底板242上进一步设置有两个定位栓241，分别对应两个耳部213的穿孔2131。在组装时，定位栓241会经由穿孔2131穿设耳部213，藉此，框架21会定位设置在背板24上。此时，框架21是藉由其耳部213与定位栓241进行定位设置，所以应力最多只会发生在耳部213与定位栓241之间，并且定位栓241及耳部213位在容置有光学膜片22(221至224)的容置空间S之外，两者之间所产生应力亦不致于影响光学膜片22使其产生波纹现象。
此外，本实施例液晶显示装置2的背光模块20的其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
第五实施例：液晶显示装置与背光模块
请参考图4A及图4B，分别为本申请的一种背光模块30与一种液晶显示装置3的一实施例的示意图。液晶显示装置3包括壳体F以及一背光模块30。背光模块30设置于壳体F。与前述的实施例类似，为了图面简洁，本实施例中并没有画出光源模块以及包含有控制电路的液晶模块部分，但是本技术领域具有通常知识的技术人员都应该知道光源模块是设置在背板34上，而前述的液晶模块是在迭置在背光模块30的上层，而壳体F则是与背板34共同框住液晶模块、背光模块30及导光板33。此外，本实施例的液晶显示装置2的光源型态可是以侧光式光源，也可以是直下式，而发光光源可以是发光二极管或冷阴极射线管(CCFL)，本申请并不加以限制。
请参考图4A至图4D，背光模块30包括背板34以及至少一光学膜片。而本实施例是以背光模块30包含有四片光学膜片321、322、323、324所共同组成的光学膜片组32为例进行说明。但是在其他实施态样中，光学膜片的数量可以依照实际需求进行调整，本申请对此并不限制。背板34具有至少一个支撑组件。如图中所示，支撑组件是设置在背板34的底板342上。支撑组件具有支撑轴P1与多个鳍片构造PF1，所述的多个鳍片构造PF1是连接并环设在支撑轴P1的外部。而光学膜片组32具有至少一个穿孔32H，且穿孔32H的开设位置对应于背板34上支撑组件的位置。如图中所示，支撑组件(亦即支撑轴P1与环设在其外部的多个鳍片构造PF1)穿设光学膜片组32的穿孔32H。此外，在本实施例中，导光板33对应支撑组件的部分也开设有穿孔33H，所以本实施例的支撑组件是穿设光学膜片组32的穿孔32H以及导光板33的穿孔33H。而四片光学膜片321、322、323、324可以是各自独立的选择自扩散片、菱镜片、增亮片，及反射式增亮片所组成的群组。在其他的实施态样中，光学膜片32的种类及数量可以依照实际需求进行调整，本申请并不加以限制。
请同时参考图4A与图4D，图4D是图4A的液晶显示装置沿AA线的剖面示意图。如图中所示，光学膜片组32的穿孔32H的内侧壁只与鳍片构造PF1接触。也就是说，光学膜片组32的穿孔32H的内侧壁不直接与支撑轴P1接触。如此一来，当背光模块的光学膜片组32发生热膨胀的情况时，穿孔32H会变小，其内侧壁最多只会挤压到鳍片构造PF1而不会直接接触到较硬的支撑轴P1。而当鳍片构造PF1受到穿孔32H的内侧壁的挤压时，会产生形变，藉此作为空间上的 缓冲，使光学膜片组32不致产生太大的形变或平面上的翘曲，以降低波纹痕迹的产生。
所以，在较佳的情况下，相较于光学膜片组32以及支撑轴P1，鳍片构造PF1的材质较软，可挠性较高。对此，鳍片构造PF1的材质可以是海绵、硅胶、或软橡胶(soft rubber，主材质是聚氯乙烯)，或是前述材料的任意组合。
请参考图4E至图4G，在本实施例中，鳍片构造PF1是以对称方式连接并环设在支撑轴P1的外部，而其数量可以是3片、4片、5片或6片。在其他的实施态样中，鳍片构造的设置型态与设置数量可以依照实际需求进行调整，本申请并不加以限制。
第六实施例：液晶显示装置与背光模块
请参考图5A至图5B，为本申请的一种液晶显示装置3a与其背光模块30a的一实施例的示意图。本实施例的液晶显示装置3a与背光模块30a大致与前述第五实施例中的液晶显示装置3及背光模块30相同。液晶显示装置3a也是包括有包括壳体以及背光模块30a。背光模块30a设置于壳体。背光模块30a包括背板34a、导光板33a以及光学膜片组32a(包含光学膜片321a、322a、323a、324a)。在本实施例中，为了图面简洁，本实施例中并没有画出壳体。支撑组件是设置在背板34的底板342上。
与前述实施例不同的地方在于，本实施例的背板34a的底板342a上设置有两个支撑组件，两个支撑组件分别具有支撑轴P1、P2与多个鳍片构造PF1、PF2。所述的多个鳍片构造PF1是连接并环设在支撑轴P1的外部。而鳍片构造PF2则是连接并环设在支撑轴P2的外部。而光学膜片组32a具有两个穿孔32Ha及32Hb，且穿孔32Ha的开设位置对应于背板34a上支撑轴P1的位置，而穿孔32Hb的开设位置对应于背板34a上支撑轴P2的位置。如图所示，穿孔32Ha及穿孔32Hb的中心点的联线(BB联线)是通过光学膜片组32a的中心点C。本实施例这里所指的「中心点」是穿孔32Ha、32Hb与光学膜片组32a各自在液晶显示装置3a主要平面上所呈现的二维构型的几何中心点。
请同时参考图5A与图5B，图5B是图5A的液晶显示装置沿BB线的剖面示意图。如图中所示，光学膜片组32a的穿孔32Ha及32Hb的内侧壁分别只与鳍片构造PF1及鳍片构造PF2接触。也就是说，光学膜片组32a的穿孔32Ha及32Hb的内侧壁不直接与支撑轴P1、P2接触。如此一来，即便在液晶显示装置3a是 直立而其主要平面平行于重力方向时，重心通常会通过光学膜片组32a的中心点，因此采用这种设计(穿孔32Ha及穿孔32Hb的中心点的联线通过光学膜片组32a的中心点)的液晶显示装置3a在直立时会较为稳固，且不易因此发生应力太过于集中在某处的现象。而当背光模块的光学膜片组32a发生热膨胀的情况时，穿孔32Ha及32Hb会变小，其内侧壁最多只会挤压到鳍片构造PF1及鳍片构造PF2而不会直接接触到较硬的支撑轴、P2。而当鳍片构造PF1及鳍片构造PF2受到穿孔32Ha及32Hb的内侧壁的挤压时，会产生形变，藉此作为空间上的缓冲，使光学膜片组32a不致产生太大的形变或平面上的翘曲，以降低波纹痕迹的产生。
此外，本实施例液晶显示装置3a及其背光模块30a的其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
第七实施例：液晶显示装置与背光模块
图6A为本申请的一种液晶显示装置4与其背光模块40的示意图。请参考图6A至图6D，其中图6C是显示液晶显示装置4还没有设置光学膜片与导光板的示意图，图6D是显示图6A的液晶显示装置4的右上角角落部分放大的示意图。液晶显示装置4包括壳体以及一背光模块40。背光模块40设置于壳体。与前述的实施例类似，为了图面简洁，本实施例中并没有画出壳体以及包含有控制电路的液晶模块部分，但是本技术领域具有通常知识的技术人员都应该知道前述的液晶模块是在迭置在背光模块40的上层，而壳体则是与背板44共同框住液晶模块、背光模块40及导光板43。
本实施例的液晶显示装置4是以侧光式光源，而发光光源则是以发光二极管为例进行说明。背光模块40包括背板44、至少一光源组件45以及至少一光学膜片42。光源组件45具有至少一光源451及至少一基板452，光源451是设置在基板452上，而光源组件45是设置在背板44上。如图所示，在背板44的四周内侧壁(XZ平面及YZ平面)上各自设置有一个光源组件45。光源组件45包括多个光源451以及承载有多个光源451的基板452。如前所述，这里的光源451是发光二极管。而在光学膜片42以及背板44的底部442之间，进一步设置有导光板43，如此一来，光源451的点光源可以藉由导光板43的引导而变成面光源(XY平面)的形式向Z方向发出，作为液晶显示装置4显示用的背光光源。
本实施例中，是以具有一片光学膜片42为例进行说明，但本申请并不以此为限。而光学膜片42可以是扩散片、菱镜片、增亮片，或反射式增亮片。
请同时参考图6A与图6D，光学膜片42具有对应于光源组件45的凹陷构型。并且，光学膜片42藉由这些凹陷构型定位设置在背板44上。详细来说，光学膜片42在XY平面上的四个侧边，对应于每一个光源451以及基板452都具有对应的凹陷构型；并且，光学膜片42不直接接触光源组件45。如图所示，光学膜片42与光源451之间存在有间隙G1，其与基板452之间在X方向上存在有间隙G2，而在Y方向上也与基板452之间存在有间隙G3。另外，在较佳的情况下，光学膜片42与背板44的至少一内侧壁之间也具有间隙。
藉由上面的这些设计，光学膜片42即可简单地定位设置于背光模块40中。而当光学膜片42发生热膨胀的情况时，也不会直接受到背板44内侧壁及/或光源组件45的挤压。也就是说，以光学膜片42与光源组件45甚至是与背板44之间的间隙作为空间上的缓冲，使光学膜片42在发生热膨胀时也不致产生太大的形变或平面上的翘曲，以降低波纹痕迹的产生。
此外，本实施例液晶显示装置4及其背光模块40的其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
第八实施例：液晶显示装置与背光模块
请参考图7A至图7B，图7A为本申请的一种液晶显示装置4a与其背光模块40a的示意图，图7B是显示图7A的液晶显示装置4a的右上角角落部分放大的示意图。本实施例的液晶显示装置4a与背光模块40a大致与前述第七实施例中的液晶显示装置4及背光模块40相同。液晶显示装置4a也是包括有包括壳体以及背光模块40a。背光模块40a设置于壳体。与前述的实施例类似，为了图面简洁，本实施例中并没有画出壳体以及包含有控制电路的液晶模块部分。
背光模块40a包括包括背板44a、至少一光源组件45a以及至少一光学膜片42a。光源组件45a具有至少一光源451a及至少一基板452a，光源451a是设置在基板452a上，而光源组件45a是设置在背板44a上。光学膜片42a具有对应于光源组件45a的凹陷构型。并且，光学膜片42a藉由这些凹陷构型定位设置在背板44a上。
与前述第七实施例中的液晶显示装置4及背光模块40不同之处在于，本第 八实施例的光学膜片42a上对应于光源组件45a的凹陷构型不再对应到每一个光源451a，而是以光源组件45a为一个整体作为构型上的对应。换句话说，原本在第七实施例中，光学膜片42对应每一个光源451都有一个凹陷构型，但是在本实施例中，如图7B所示，光学膜片42a在X方以及Y方向的侧边上的凹陷构型，都只对应整个光源组件45a。这样的设计较为简单，可以进一步降低光学膜片42a的制作工序以及制作成本。然而，这样的设计仍然保留了让光学膜片42a可以简单地定位设置于背光模块40中的功能。而当光学膜片42a发生热膨胀的情况时，也不会直接受到背板44a内侧壁及/或光源组件45a的挤压。也就是说，以光学膜片42a与光源组件45a甚至是与背板44a之间的间隙作为空间上的缓冲，使光学膜片42a在发生热膨胀时也不致产生太大的形变或平面上的翘曲，以降低波纹痕迹的产生。
此外，本实施例液晶显示装置4a及其背光模块40a的其余各部件的具体组成、变化状态与其它部件的连接关系，则同于前面实施例中所述，于此不再赘述。
以上内容是结合具体的优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 (20)

  1. 一种背光模块，包括：
    一背板；
    至少一光源组件，所述至少一光源组件具有至少一光源及至少一基板，所述光源是设置在所述基板上，所述光源组件是设置在所述背板上；以及
    至少一光学膜片，所述光学膜片具有对应于所述光源组件的凹陷构型，且藉此所述光学膜片定位设置在所述背板上。
  2. 如权利要求1所述的背光模块，其中所述光学膜片的所述凹陷构型进一步对应于所述光源及所述基板。
  3. 如权利要求1所述的背光模块，其中所述光学膜片不直接接触所述光源组件。
  4. 如权利要求3所述的背光模块，其中所述光学膜片与所述背板的至少一内侧壁之间具有一间隙。
  5. 如权利要求1所述的背光模块，其中所述多个光学膜片是选自由扩散片、菱镜片、增亮片，及反射式增亮片所组成的群组。
  6. 如权利要求1所述的背光模块，其中所述背板具有至少一支撑组件，所述的支撑组件具有一支撑轴与多个鳍片构造，所述多个鳍片构造是连接并环设在所述支撑轴的外部，且所述光学膜片具有至少一穿孔，所述的至少一支撑组件是穿设所述光学膜片的所述穿孔。
  7. 如权利要求6所述的背光模块，其中所述穿孔的内侧壁只与所述鳍片构造接触。
  8. 如权利要求6所述的背光模块，其中所述背板具有多个所述的支撑组件，且所述光学膜片具有多个对应于所述多个支撑组件的穿孔，其中所述多个穿孔的其中两个穿孔的中心点的联线是通过所述光学膜片的中心点。
  9. 如权利要求6所述的背光模块，其中所述多个鳍片构造的数量是3片、4片、5片或6片。
  10. 如权利要求6所述的背光模块，其中所述多个鳍片构造的材质是选 自海绵、硅胶、及软橡胶所组成的群组。
  11. 一种液晶显示装置，包括：
    一壳体，以及
    一背光模块，所述背光模块设置于所述壳体，所述背光模块包括：
    一背板；
    至少一光源组件，所述至少一光源组件具有至少一光源及至少一基板，所述光源是设置在所述基板上，所述光源组件是设置在所述背板上；及
    至少一光学膜片，所述光学膜片具有对应于所述光源组件的凹陷构型，且藉此所述光学膜片定位设置在所述背板上。
  12. 如权利要求11所述的液晶显示装置，其中所述所述光学膜片的所述凹陷构型进一步对应于所述光源及所述基板。
  13. 如权利要求11所述的液晶显示装置，其中所述光学膜片不直接接触所述光源组件。
  14. 如权利要求13所述的液晶显示装置，其中所述光学膜片与所述背板的至少一内侧壁之间具有一间隙。
  15. 如权利要求11所述的液晶显示装置，其中所述多个光学膜片是选自由扩散片、菱镜片、增亮片，及反射式增亮片所组成的群组。
  16. 如权利要求11所述的液晶显示装置，其中所述背板具有至少一支撑组件，所述的支撑组件具有一支撑轴与多个鳍片构造，所述多个鳍片构造是连接并环设在所述支撑轴的外部，且所述光学膜片具有至少一穿孔，所述的至少一支撑组件是穿设所述光学膜片的所述穿孔，且所述穿孔的内侧壁只与所述鳍片构造接触。
  17. 如权利要求16所述的液晶显示装置，其中所述背板具有多个所述的支撑组件，且所述光学膜片具有多个对应于所述多个支撑组件的穿孔，其中所述多个穿孔的其中两个穿孔的中心点的联线是通过所述光学膜片的中心点。
  18. 如权利要求16所述的液晶显示装置，其中所述多个鳍片构造的数量 是3片、4片、5片或6片。
  19. 如权利要求16所述的液晶显示装置，其中所述多个鳍片构造的材质是选自海绵、硅胶、及软橡胶所组成的群组。
  20. 一种液晶显示装置，包括：
    一壳体，以及
    一背光模块，所述背光模块设置于所述壳体，所述背光模块包括：
    一背板，所述背板具有至少一支撑组件，所述的支撑组件具有一支撑轴与多个鳍片构造，所述多个鳍片构造是连接并环设在所述支撑轴的外部；
    至少一光源组件，所述至少一光源组件具有至少一光源及至少一基板，所述光源是设置在所述基板上，所述光源组件是设置在所述背板上；及
    至少一光学膜片，所述光学膜片具有对应于所述光源组件的凹陷构型，藉此所述光学膜片定位设置在所述背板上，所述光学膜片具有至少一穿孔，所述背板的所述至少一支撑组件是穿设所述光学膜片的所述穿孔，且所述穿孔的内侧壁只与所述鳍片构造接触，所述光学膜片不直接接触所述光源组件，且所述光学膜片与所述背板的至少一内侧壁之间具有一间隙。
PCT/CN2017/110091 2017-10-12 2017-11-09 液晶显示装置及其背光模块 Ceased WO2019071691A1 (zh)

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