WO2024031785A1 - 可限位膜片与导光元件的背光模组及显示器 - Google Patents

可限位膜片与导光元件的背光模组及显示器 Download PDF

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Publication number
WO2024031785A1
WO2024031785A1 PCT/CN2022/119823 CN2022119823W WO2024031785A1 WO 2024031785 A1 WO2024031785 A1 WO 2024031785A1 CN 2022119823 W CN2022119823 W CN 2022119823W WO 2024031785 A1 WO2024031785 A1 WO 2024031785A1
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WO
WIPO (PCT)
Prior art keywords
light guide
guide element
diaphragm
backlight module
limiting
Prior art date
Application number
PCT/CN2022/119823
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English (en)
French (fr)
Inventor
余世伟
黄定璇
侯珮棻
Original Assignee
瑞仪光电(苏州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 瑞仪光电(苏州)有限公司 filed Critical 瑞仪光电(苏州)有限公司
Priority to CN202280006019.XA priority Critical patent/CN117882002A/zh
Publication of WO2024031785A1 publication Critical patent/WO2024031785A1/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

Definitions

  • the present invention relates to optical elements, and in particular to a backlight module and a display that can limit a diaphragm and a light guide element.
  • LCD monitors mainly include backlight modules and LCD panels.
  • a light guide plate and an optical film are arranged between the outer frame and the backplane of the backlight module.
  • the LCD panel is fixed on the backlight module through adhesive provided on the adhesive side of the LCD.
  • the optical film is fixed on the side wall or light guide plate of the backplane in a stepped shape.
  • Most light guide plates use two L-shaped fixings located on the left and right sides of the backlight module to buffer expansion and contraction and fix the position, and the diaphragm is fixed to the backplane using double-sided tape.
  • the attachment surface depends on the width of the attachment point of the back panel. Therefore, the attachment area is easily limited, resulting in a smaller attachment area and poor fixation.
  • an object of the present invention is to provide a backlight module that strengthens and fixes the relative position between an optical film and a light guide element, and a display including the backlight module.
  • the backlight module capable of limiting a diaphragm and a light guide element.
  • the backlight module includes a carrier, a light guide element, a diaphragm, a front frame, and at least one limiting cover.
  • the bearing member includes a first accommodation space and an inner wall. The inner wall surrounds and defines the first accommodation space and forms a position-limiting groove.
  • the light guide element is accommodated in the first accommodation space.
  • the film is accommodated in the first accommodation space and arranged on the light guide element.
  • the front frame includes a first part, a second part and an opening. The first part is bonded to the carrier. At least a part of the light guide element and the film is covered by the second part.
  • the opening is formed in the second part.
  • the limiting cover is fitted in the opening and the limiting groove, and includes a first extension part and a second extension part.
  • the first extension part passes through the opening of the front frame, and the second extension part extends between the front frame and the diaphragm.
  • the above-mentioned light guide element includes a light guide element lug and at least one positioning post.
  • the positioning post is arranged on the lug of the light guide element.
  • the diaphragm includes diaphragm lugs and at least one positioning hole. Positioning holes are provided on the diaphragm lugs. The diaphragm is positioned on the positioning post of the light guide element through the positioning hole.
  • the above-mentioned limiting cover includes a second accommodation space, and the second accommodation space accommodates the lugs of the light guide element.
  • the second accommodation space of the above-mentioned limiting cover accommodates the positioning post of the light guide element.
  • the second accommodation space of the above-mentioned limiting cover accommodates the diaphragm lug.
  • the second accommodation space of the above-mentioned limiting cover accommodates the positioning hole of the diaphragm.
  • the above-mentioned limiting cover is fitted between the inner wall and the light guide element.
  • the above-mentioned second extension portion presses the diaphragm along the direction in which the diaphragm is disposed on the light guide element.
  • This display includes the above-mentioned backlight module and display panel.
  • the display panel is arranged above the backlight module.
  • the above-mentioned front frame carries a display panel.
  • the above-mentioned display further includes a limiting cover side and at least one adhesive side.
  • the display panel is fixed on the backlight module through adhesive provided on the adhesive side.
  • the above-mentioned limiting cover provided on the side of the limiting cover directly contacts the display panel through the opening to carry the display panel.
  • the present invention simultaneously presses the diaphragm and the light guide element through the second extension part of the limiting cover, thereby limiting the shaking degree of the diaphragm and the light guide element inside the carrier, and also preventing the diaphragm and the light guide element from shaking.
  • the front frame is close to the opening on the surface of the display panel, so that the first extension part of the limiting cover can pass through the opening, and the limiting cover is used to replace the adhesive to carry the display panel.
  • FIG. 1 is an exploded schematic diagram of a display according to a first embodiment of the present invention
  • Figure 2 is an enlarged schematic view of the limiting cover according to Figure 1;
  • FIG. 3 is a schematic diagram showing the combination of the carrier, the light guide element, multiple diaphragms, the front frame, and the limiting cover according to FIG. 1 , and illustrates a partial section along the AA' section line of FIG. 1 cross-section;
  • FIG. 4 is an exploded schematic diagram of a display according to a second embodiment of the invention.
  • FIG. 1 is an exploded schematic diagram of a display according to a first embodiment of the present invention.
  • the Z direction in FIG. 1 is the normal direction of the display plane 10A of the display 10 , or can also be regarded as the stacking direction of the backlight module 100 and the display panel 200 .
  • Both the X direction and the Y direction are parallel to the display plane 10A of the display 10 , and the X direction is perpendicular to the Y direction.
  • the X direction and the Y direction are respectively perpendicular to the Z direction shown in Figure 1.
  • the display 10 of this embodiment includes at least a backlight module 100 and a display panel 200 .
  • the backlight module 100 of this embodiment can be mainly combined with the display panel 200 of the display 10 to provide a backlight source for the display panel 200 of the display 10 .
  • the backlight module 100 mainly includes a carrier 110, a light guide element 120, one or more films 130/130A/130B/130C, a front frame 140, and at least one limiting cover 150.
  • the backlight module 100 can be combined with the display panel 200 (as shown in FIG. 3 ) through the front frame 140 .
  • the bearing member 110 includes a first accommodation space 111, an inner side wall 115 and an outer side wall 116.
  • the bearing member 110 may be rectangular, but this is only used for illustration and not for limiting the present invention.
  • the inner wall 115 surrounds and defines the first accommodation space 111 and forms a limiting groove 113 .
  • a limiting groove 113 is formed extending from the first accommodating space 111 toward the inner wall 115 so that the first accommodating space 111 and the limiting groove 113 are connected to each other.
  • the first accommodating space 111 and the limiting groove 113 are connected together. Create a convex space.
  • the first accommodation space 111 and the limiting groove 113 can accommodate the light guide element 120, one or more films 130/130A/130B/130C, and at least one limiting cover 150.
  • the light guide element 120 may be a light guide plate (LGP) used in the backlight module 100 .
  • the shape of the light guide element 120 may correspond to the shapes of the first accommodating space 111 and the limiting groove 113 , and be accommodated in the first accommodating space 111 and the limiting groove 113 .
  • one or more films 130/130A/130B/130C may be various optical films used in the backlight module 100, such as a lower diffusion sheet.
  • the shape of one or more diaphragms 130/130A/130B/130C can correspond to the shape of the first accommodating space 111 and the limiting groove 113, and be accommodated in the first accommodating space 111. with the limiting groove 113 and arranged on the light guide element 120 .
  • the light guide element 120 includes light guide element lugs 121 extending outward along the Y direction to form a convex structure.
  • the light guide element lugs 121 are accommodated in the limiting grooves 113 .
  • the size of the limiting groove 113 may be slightly larger than the size of the light guide element lug 121 to accommodate the limiting cover 150 more accordingly.
  • the light guide element 120 may also include at least one positioning post disposed on the light guide element lug 121 .
  • the diaphragm 130 includes diaphragm lugs 131 extending outward along the Y direction to form a convex structure.
  • the diaphragm lugs 131 are accommodated in the limiting grooves 113 .
  • the size of the limiting groove 113 may be slightly larger than the size of the diaphragm lug 131 .
  • the diaphragm 130 may also include at least one positioning hole provided on the diaphragm lug 131 .
  • the diaphragm 130 can be positioned by being placed on at least one positioning post of the light guide element 120 through at least one positioning hole.
  • the light guide element 120 may include two positioning posts, such as a first positioning post 122A and a second positioning post 122B, which are only for illustrative purposes and are not intended to limit the present invention. invention. If necessary, the light guide element 120 may include more positioning posts.
  • the diaphragm 130 may include two positioning holes, such as a first positioning hole 132A and a second positioning hole 132B, which are only used for illustration and not for limitation. this invention. The first positioning hole 132A and the second positioning hole 132B are located on the surface 133 of the diaphragm 130 . If necessary, the diaphragm 130 may include more positioning holes.
  • the first positioning post 122A and the second positioning post 122B are disposed on the surface 123 of the light guide element 120 and extend from the surface 123 of the light guide element 120 along the Z direction parallel to the normal line of the surface 123 of the light guide element 120 . out.
  • the shape of the positioning post of the light guide element 120 may be cylindrical, which is only used for illustration and not for limiting the present invention.
  • the shape of the positioning hole of the diaphragm may be cylindrical, which is only used for illustration and not for limiting the present invention.
  • the diaphragm 130 is disposed on the light guide element 120 , so the shape, number, or position of the positioning holes of the diaphragm 130 can be set corresponding to the shape, number, or position of the positioning posts of the light guide element 120 .
  • the diaphragm 130C may be located between the light guide element 120 and the carrier 110 .
  • the diaphragm 130C in this position is generally called a reflective sheet.
  • the front frame 140 covers the limiting groove 113 , the inner wall 115 and part of the first accommodation space 111 , and includes a first part 141 , a second part 142 and an opening 143 .
  • the first part 141 and the second part 142 are arranged approximately perpendicular to each other. For example, the angle between the first part 141 and the second part 142 is approximately equal to 90 degrees, so that the first part 141 extends along the Z direction and the second part 142 extends along the X direction. extend.
  • the first part 141 is combined with the carrier 110 .
  • the second part 142 does not completely cover the light guide element 120 and one or more diaphragms 130/130A/130B/130C, but completely covers the light guide element lug 121, the first positioning post 122A, The second positioning post 122B, the diaphragm lug 131, the first positioning hole 132A and the second positioning hole 132B.
  • the opening 143 is formed in the second part 142 and communicates with the opposite inner surface 142A and the outer surface 142B of the second part 142 to expose the limiting groove 113 of the convex space.
  • inner surface 142A is different than outer surface 142B.
  • the limiting cover 150 is disposed in the limiting groove 113 and includes a first extending portion 151 and a second extending portion 152 .
  • the size or shape of the limiting cover 150 roughly corresponds to the size or shape of the limiting groove 113 , so that the limiting cover 150 can fit into the opening 143 and the limiting groove 113 , or the opening 143 and the limiting groove 113 can be accommodated together.
  • the first extension part 151 and the second extension part 152 are arranged approximately perpendicular to each other.
  • the angle between the first extension part 151 and the second extension part 152 is approximately equal to 90 degrees, so that the first extension part 151 extends along the Z direction, Moreover, the size, shape, number or position of the first extension portion 151 generally corresponds to the size, shape, number or position of the opening 143 so that the first extension portion 151 can pass through the opening 143 of the front frame 140 along the Z direction.
  • the second extension portion 152 extends along the plane of the X direction and the Y direction to between the front frame 140 and the diaphragm 130B.
  • the limiting cover 150 is fitted into the limiting groove 113 of the carrier 110 and the first extension 151 of the limiting cover 150 passes through the opening 143 of the front frame 140 , so that the limiting cover 150 can be stably combined with the bearing member 110 and the front frame 140 at the same time. Furthermore, the second extension portion 152 of the limiting cover 150 extends between the front frame 140 and the diaphragm 130 , thereby allowing the gap between the front frame 140 and the diaphragm 130 to pass through the second extending portion of the limiting cover 150 152 is filled, so the diaphragm 130 is not easy to jump out here, thereby achieving the purpose of reducing the risk of the diaphragm 130 jumping out here.
  • the position of the limiting cover 150 may be provided on one of the four sides of the bearing member 110 , for example, may be provided on a long side of the bearing member 110 .
  • the number of limiting covers 150 in a backlight module 100 can be reduced to only one, and the single limiting cover 150 is disposed approximately in the middle of a certain side of the carrier 110. Therefore, The limit cover 150 does not need to be designed in an L shape. In this way, the light guide element 120 can be fixed without providing two L-shaped fixing pieces, which can simplify the structure of the backlight module 100, reduce the number of components of the backlight module 100, reduce material costs or reduce the manufacturing cost of the backlight module 100. the goal of.
  • FIG. 2 is an enlarged schematic diagram of the limiting cover 150 according to FIG. 1 .
  • the second accommodation space 156 is defined by the cover wall 153, the cover wall 154, the cover wall 155 and the second extension part 152 of the limiting cover 150. Therefore, the limit cover 150 is limited to The cover 150 includes a second accommodation space 156 .
  • the position of the second accommodation space 156 corresponds to the position of the light guide element lug 121 and the position of the diaphragm lug of the diaphragm 130/130A/130B/130C, for example, the position of the diaphragm lug 131 is set, whereby the second The accommodating space 156 accommodates the light guide element lugs 121 and the diaphragm lugs 131, at least one positioning post, such as the first positioning post 122A and the second positioning post 122B, and at least one positioning hole, such as the first positioning post. Positioning hole 132A and second positioning hole 132B.
  • the limiting cover 150 can be made of soft and elastic organic or inorganic materials, so it has the characteristics of compression deformation.
  • the limiting cover 150 can be tightly fitted into the opening 143 and the limiting groove 113, or fit into the opening 143 and the limiting groove 113. Between the inner wall 115 and the light guide element 120, the light guide element 120 will be limited by the limiting cover 150 to reduce its movement range, which can avoid the contact between the light guide element 120 and the film during the reliability test or vibration experiment. The scratches on the light-emitting surface caused by friction between the sheets 130 can effectively maintain the light-emitting quality and also reduce the chance of foreign matter entering the backlight module 100 .
  • the limiting cover 150 can be made of natural rubber, artificial rubber, elastic materials or a combination thereof, which is only used to illustrate the present invention. It should be noted that the material of the limiting cover 150 in this embodiment is not used to limit the present invention. In other embodiments, the limiting cover 150 can also be made of different materials.
  • FIG. 3 is a schematic diagram showing the assembly of the carrier 110 , the light guide element 120 , the plurality of diaphragms 130/130A/130B/130C, the front frame 140 , the limiting cover 150 and the display panel 200 according to FIG. 1 , and illustrates the edges along the Refer to the partial cross-sectional view cut along the AA' section line in Figure 1. Please refer to Figures 1, 2 and 3 at the same time.
  • the light guide element 120, the plurality of diaphragms 130/130A/130B/130C, and the limiting cover 150 are housed in the first accommodation space 111.
  • the diaphragm 130C, the light guide element 120, the diaphragm 130, the diaphragm 130A and the diaphragm 130B are sequentially accommodated in the first accommodation space 111 along the Z direction.
  • the limiting cover 150 is disposed against the inner wall 115 of the carrier 110 , is fitted between the inner wall 115 and the light guide element 120 , and is tightly accommodated in the limiting groove 113 extending from the first accommodation space 111 In this way, the light guide element 120 and the limiting cover 150 will be limited and engaged with each other to reduce the movement range of the light guide element 120, thereby avoiding scratches on the light-emitting surface caused by friction between the light guide element 120 and the diaphragm 130.
  • the luminous quality can be effectively maintained, and the chance of foreign matter entering the backlight module 100 can also be achieved or reduced.
  • the first part 141 of the front frame 140 is arranged parallel to the outer side wall 116 and is combined with the outer side wall 116 .
  • the display panel 200 is disposed on the front frame 140 so that the front frame 140 bears at least part of the weight of the display panel 200 .
  • the inner surface 142A of the second part 142 of the front frame 140 is connected to the second extension part 152 of the limiting cover 150 , and the outer surface 142B is connected to the display panel 200 .
  • the first extending portion 151 of the limiting cover 150 can directly contact the display panel 200 through the opening 143 of the front frame 140 along the Z direction to bear at least part of the weight of the display panel 200 , for example, the first extending portion of the limiting cover 150 151 may carry the weight of the display panel 200 together with the front frame 140 .
  • the limit cover 150 can not only be stably combined with the carrier 110 and the front frame 140 at the same time, but can also use the first extension 151 to carry the display panel 200. Therefore, the limit cover 150 has a unique composite mechanism effect.
  • the second extension part 152 extends along the plane of the X direction and the Y direction to between the front frame 140 and the diaphragm 130B, for example, extends to the gap.
  • the second extension part 152 can be filled in the gap 144, so that the gap between the front frame 140 and the diaphragm 130 can be filled by the second extension part 152 of the limiting cover 150, so that the diaphragm 130 does not It is easy to cause the risk of tripping here, which can avoid scratches on the light-emitting surface caused by tripping friction between the light guide element 120 and the diaphragm 130, and effectively maintain the light-emitting quality.
  • the second extension part 152 can fill the gap and also achieve or reduce the passage of foreign matter. The gap enters the backlight module 100 for the purpose of opportunity.
  • the second extension part 152 can also cover the light guide element lug 121, the first positioning post 122A, the diaphragm lug 131, and the first positioning hole 132A in the Z direction.
  • the first positioning post 122A engaging the first positioning hole 132A is only used for illustration and is not used to limit the present invention.
  • the front frame 140 can be tightly attached to the second extension portion 152 so that the second extension portion 152 is disposed along the film in the direction of the light guide element 120 , for example, along Z direction, pressing the diaphragm, for example, pressing the diaphragm 130B, the diaphragm 130A, and the diaphragm 130, thereby achieving the purpose of limiting the shaking of the diaphragm in the first accommodation space 111.
  • the second extension part 152 indirectly presses the light guide element 120 by pressing the film, and limits the relative displacement between the film and the light guide element 120, thereby limiting the film and the light guide element 120 in the first position.
  • the purpose of shaking in the accommodating space 111 is to reduce the risk of scratching the light guide element 120 due to friction between the diaphragm and the light guide element 120, thereby affecting the light emitting quality, or causing abnormal noise.
  • FIG. 4 is an exploded schematic diagram of a display according to a second embodiment of the present invention.
  • the X direction, Y direction and Z direction in FIG. 4 respectively correspond to the X direction, Y direction and Z direction shown in FIG. 1 .
  • the display 10 further includes a limiting cover side 11 and at least one adhesive side, for example several adhesive sides, each of the at least one adhesive side is provided with at least one adhesive.
  • the adhesive can be in the form of long strips, respectively corresponding to the adhesive sides of several sides of the display panel 200 .
  • the number of sticking sides is three, and they are respectively arranged on three sides of the display panel 200 that are not close to the limiting cover 150 .
  • the display 10 includes a limit cover side 11 close to the limit cover 150 , an adhesive side 12 not close to the limit cover 150 , an adhesive side 13 and an adhesive side 14 , which are only used for demonstration.
  • the adhesive may be a double-sided adhesive tape, which is only used to illustrate the present invention. It should be noted that the positional arrangement of the limiting cover side 11 and the adhesive side in this embodiment is not intended to limit the present invention. In other embodiments, the position of the limiting cover side 11 and the position of the adhesive side may also be different from those in this embodiment.
  • the limiting cover side 11 , the adhesive side 12 , the adhesive side 13 and the adhesive side 14 may be parallel or perpendicular to the X direction or Y direction of the display plane of the display panel 200 respectively.
  • the limiting cover side 11 corresponds to the position where the limiting cover 150 is provided on the backlight module 100 , for example, corresponds to the long side of the backlight module 100 where the limiting groove 113 is provided.
  • part of the adhesive side does not need to be provided with adhesive. This can also achieve the same purpose as mentioned above, so it will not be described again here.
  • the adhesive side 12 is provided with adhesive 12A
  • the adhesive side 13 is provided with adhesive 13A
  • the adhesive side 14 is provided with adhesive 14A.
  • the display panel 200 can be fixed on the backlight module 100 through at least one adhesive provided on at least one adhesive side, such as adhesive 12A, adhesive 13A, and adhesive 14A.
  • the limit cover side 11 may not be provided with adhesive, but the limit cover 150 may be used to replace the function of adhesive to carry the display panel 200. This can achieve the purpose of reducing the amount of adhesive used, which can not only reduce costs, but also reduce costs.
  • the attached area of the frame can maintain the technical effect of a narrow frame.
  • the number of light guide elements, light guide element lugs, diaphragms, diaphragm lugs, positioning holes, positioning posts, limiting covers or openings described in this embodiment are only for demonstration purposes. used to limit the invention. In other embodiments, the number of diaphragms, positioning holes or positioning posts can be changed according to requirements. In some embodiments, the diaphragm may not use fixing glue at all and only use a combination of positioning holes and corresponding positioning posts to form a positioning structure, and the shapes thereof may be designed to match each other's shapes.
  • the present invention performs positioning by correspondingly hanging at least one positioning hole provided on the lug of the diaphragm on at least one positioning post on the lug of the light guide element, thereby improving the relationship between the diaphragm and the diaphragm.
  • the relative positional stability of the light guide elements can reduce the amount of fixing glue used on the diaphragm.
  • the number of limit covers used in the backlight module can be reduced to one, and the second accommodation of the limit cover can be relied on.
  • the space accommodates the diaphragm lugs and the light guide element lugs, and fixes the diaphragm and the light guide element together, while reducing the use of double-sided tape on the diaphragm and/or the light guide element.
  • the second extension of the limiting cover presses the diaphragm and the light guide element together along the Z direction, thereby limiting the shaking of the diaphragm and the light guide element inside the carrier, and also avoiding friction between the diaphragm and the light guide element. risk of scratches and unwanted noise.
  • an opening structure is added to the surface of the front frame close to the display panel, so that the first extension part of the cap-type limiting cover can pass through the opening, and the cap-type limiting cover is used instead of adhesive to carry the display panel.
  • the limit cover is embedded in the opening and the limit groove, which can limit the movement range of the light guide element, strengthen the fixing strength of the diaphragm, and improve the scratches between the lower diffuser and the light guide element in the diaphragm. It can achieve the purpose of limiting the displacement of the diaphragm and the light guide element.
  • the backlight module uses the side of the limit cover where the limit cover is provided to eliminate the need for adhesive, and only uses the adhesive on the remaining adhesive sides to fix the display panel, thus reducing the amount of adhesive used.
  • the material of the limit cover itself has the characteristics of compression deformation. Through this, the limit cover can simultaneously absorb the expansion force of the diaphragm or the light guide element from the X direction, Y direction or Z direction respectively, or prevent foreign matter from entering the backlight module. middle. In this way, it can be applied to the fixed structure of general displays and backlight modules, reducing the loss cost of initial development, shortening the need for production and testing of design components, accelerating the development process, and improving the loss and labor hours of component reprocessing.

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Abstract

一种可限位膜片（130）与导光元件（120）的背光模组（100），包含：承载件（110）、导光元件（120）、膜片（130）、前框（140）、以及限位盖（150）。承载件（110）的内侧壁（1115）界定第一容置空间（111），并形成有限位槽（113）。导光元件（120）容置于第一容置空间（111）中。膜片（130）容置于第一容置空间（111）中，并设置在导光元件（120）上。前框（140）的第一部分（141）结合于承载件（110），导光元件（120）及膜片（130）的至少一部分被前框（140）的第二部分（142）覆盖，前框（140）的开口（143）形成在第二部分（142）。限位盖（150）嵌合在开口（143）及限位槽（113）中。限位盖（150）的第一延伸部（151）穿过前框（140）的开口（143），限位盖（150）的第二延伸部（152）延伸至前框（140）及膜片（130）之间。

Description

可限位膜片与导光元件的背光模组及显示器
本申请要求享有于2022年8月12日提交的申请号为202210969775.4、发明名称为“可限位膜片与导光元件的背光模组及显示器”的中国专利申请的优先权，在此通过引用将其全部内容结合于本申请中。
技术领域
本发明涉及光学元件，尤其涉及一种可限位膜片与导光元件的背光模组及显示器。
背景技术
一般液晶显示器主要包含背光模组以及液晶显示面板。背光模组中的外框与背板之间设有导光板与光学膜片。液晶显示面板经由设置在液晶显示器的黏贴侧上的黏胶，来固定在背光模组上。
现有技术中，光学膜片采用阶梯状造型固定于背板的侧墙或导光板上。大部分导光板藉由位于背光模组左、右两侧的两个L型固定件来缓冲胀缩并固定位置，而膜片再使用双面胶来固定于背板上，但是由于双面胶的贴附面取决于背板的贴附处的宽度，因此，贴附面积容易受到限制，导致贴附面积较小，固定性较差。除此之外，现有的光学膜片与外框之间会预留有缝隙，这将导致光学膜片可能跳脱或光学膜片与导光板之间发生摩擦，因而造成发光面伤痕，影响发光质量。因此，当光学膜片与导光板在背板中晃动时，光学膜片与导光板之间可能因为摩擦，而造成刮伤风险以及异音不良等许多缺点。
发明内容
因此，本发明的目的在于提供一种强化固定光学膜片与导光元件之间的相对位置的背光模组，与包含此背光模组的显示器。
根据本发明的上述目的，提出一种可限位膜片与导光元件的背光模组。此背光模组包含承载件、导光元件、膜片、前框、以及至少一限位盖。承载件包含第一容置空间及内侧壁。内侧壁围绕并界定第一容置空间，且形成有限位槽。导光元件容置于第一容置空间中。膜片容置于第一容置空间中并设置在导光元件上。前框包含第一部分、第二部分及开口。第一部分结合于承载件。导光元件及膜片的至少一部分被第二部分所覆盖。开口形成在第二部分。限位盖嵌合在开口及限位槽中，并包含第一延伸部及第二延伸部。第一延伸部穿过前框的开口，第二延伸部延伸至前框及膜片之间。
依据本发明的一实施例，上述的导光元件包含导光元件凸耳及至少一定位柱。定位柱设置于导光元件凸耳上。膜片包含膜片凸耳及至少一定位孔。定位孔设置于膜片凸耳上。膜片通过定位孔定位在导光元件的定位柱上。
依据本发明的另一实施例，上述的限位盖包含第二容置空间，第二容置空间容置导光元件凸耳。
依据本发明的又一实施例，上述的限位盖的第二容置空间容置导光元件的定位柱。
依据本发明的再一实施例，上述的限位盖的第二容置空间容置膜片凸耳。
依据本发明的再一实施例，上述的限位盖的第二容置空间容置膜片的定位孔。
依据本发明的再一实施例，上述的限位盖嵌合在内侧壁及导光元件之间。
依据本发明的再一实施例，上述的第二延伸部沿着膜片设置在导光元件的方向压制膜片。
根据本发明的上述目的，提出一种显示器。此显示器包含上述的背光模组以及显示面板。显示面板设置于背光模组的上方。
依据本发明的一实施例，上述的前框承载显示面板。
依据本发明的另一实施例，上述的显示器更包含限位盖侧，以及至少一黏贴侧。显示面板经由设置在黏贴侧的黏胶固定在背光模组上。
依据本发明的又一实施例，设置在限位盖侧的上述的限位盖穿过开口直接接触显示面板，以承载显示面板。
由上述可知，本发明通过限位盖的第二延伸部同时压制膜片与导光元件，可藉此限制膜片与导光元件在承载件内部的晃动程度，亦可避免膜片与导光元件摩擦造成的刮伤风险以及异音不良的问题。前框靠近显示面板的表面的开口，使得限位盖的第一延伸部可以穿过开口，以限位盖取代黏胶来承载显示面板。
附图说明
为了更完整地了解实施例及其优点，现在参照附图做出下列描述，其中：
图1是绘示依照本发明的第一实施方式的显示器的分解示意图；
图2是绘示依照图1的限位盖的放大示意图；
图3是绘示依照图1的承载件、导光元件、多张膜片、前框、限位盖的组合示意图，并绘示沿着图1的A-A’剖面线所剖切的局部剖面图；
图4是绘示依照本发明的第二实施方式的显示器的分解示意图。
具体实施方式
请参照图1，图1是绘示依照本发明的第一实施方式的显示器的分解示意图。图1中的Z方向为显示器10的显示平面10A的法线方向，或者也可以视为背光模组100以及显示面板200的堆叠方向。X方向与Y方向均平行于显示器10的显示平面10A，且X方向垂直于Y方向。X方向与Y方向分别垂直于图1中所示的Z方向。本实施方式的显示器10至少包含背光模组100以及显示面板200。本实施方式的背光模组100主要可结合在显示器10的显示面板200上，以提供显示器10的显示面板200的背光源。如图1所示，背光模组100主要包含承载件110、导光元件120、一张或多张膜片130/130A/130B/130C、前框140、以及至少一限位盖150。通过前框140可将背光模组100结合在显示面板200(如图3所绘示)上。
请继续参照图1，承载件110包含第一容置空间111、内侧壁115及外 侧壁116。在一示范例子中，承载件110可为矩形，但其仅用以示范说明而非用以限制本发明。在一实施例中，内侧壁115围绕并界定第一容置空间111，且形成有限位槽113。例如，从第一容置空间111向内侧壁115的方向延伸形成限位槽113，使得第一容置空间111与限位槽113彼此连通，同时第一容置空间111与限位槽113一起形成凸型空间。第一容置空间111与限位槽113可容置导光元件120、一张或多张膜片130/130A/130B/130C、以及至少一限位盖150。
例如，在一些实施方式中，导光元件120可以是用于背光模组100中的导光板(light guide plate,LGP)。在一示范性例子中，导光元件120的形状可对应于第一容置空间111与限位槽113的形状，而容置于第一容置空间111与限位槽113中。或者，在一些实施方式中，一张或多张膜片130/130A/130B/130C可以是用于背光模组100中的多种光学膜，例如下扩散片。在一示范性例子中，一张或多张膜片130/130A/130B/130C的形状可对应于第一容置空间111与限位槽113的形状，而容置于第一容置空间111与限位槽113中并设置在导光元件120上。
例如，在一实施例中，导光元件120包含沿着Y方向向外延伸出的导光元件凸耳121，而形成凸型结构。当导光元件120大致容置于第一容置空间111中时，导光元件凸耳121容置于限位槽113中。限位槽113的尺寸可以略大于导光元件凸耳121的尺寸，以更对应地容置限位盖150。导光元件120还可以包含设置于导光元件凸耳121上的至少一定位柱。在一实施例中，以膜片130为例，膜片130包含沿着Y方向向外延伸出的膜片凸耳131，而形成凸型结构。在一示范性例子中，当膜片130大致容置于第一容置空间111中时，膜片凸耳131容置于限位槽113中。限位槽113的尺寸可以略大于膜片凸耳131的尺寸。膜片130还可以包含设置于膜片凸耳131上的至少一定位孔。膜片130可以通过至少一定位孔套在导光元件120的至少一定位柱上来定位。
在一示范性例子中，如图1所绘示，导光元件120可以包含两个定位柱，例如第一定位柱122A与第二定位柱122B，其仅用以示范说明而非用以限制本发明。视情况需要，导光元件120可以包含更多个定位柱。另外， 在一示范性例子中，如图1所绘示，膜片130可以包含两个定位孔，例如第一定位孔132A与第二定位孔132B，其仅用以示范说明而非用以限制本发明。第一定位孔132A与第二定位孔132B位于膜片130的表面133。视情况需要，膜片130可以包含更多个定位孔。
第一定位柱122A与第二定位柱122B设置于导光元件120的表面123，且沿着平行于导光元件120的表面123的法线的Z方向，从导光元件120的表面123延伸而出。在一示范例子中，导光元件120的定位柱的形状可为圆柱形，其仅用以示范说明而非用以限制本发明。在一示范例子中，膜片的定位孔的形状可为圆柱形，其仅用以示范说明用而非用以限制本发明。膜片130设置在导光元件120上，因此膜片130的定位孔的形状、数量或位置，可以对应于导光元件120的定位柱的形状、数量或位置而设置。在一示范性例子中，如图1所绘示，膜片130C可以位于导光元件120与承载件110之间，在此位置的膜片130C一般被称为反射片。
前框140覆盖限位槽113、内侧壁115与部分的第一容置空间111，并包含第一部分141、第二部分142及开口143。第一部分141与第二部分142彼此大约垂直设置，例如第一部分141与第二部分142之间的夹角约等于90度，使得第一部分141沿着Z方向延伸，第二部分142沿着X方向延伸。第一部分141结合于承载件110。导光元件120及一张或多张膜片130/130A/130B/130C的至少一部分，例如靠近限位槽113的部分被第二部分142所覆盖。在一示范性例子中，第二部分142不完全覆盖导光元件120及一张或多张膜片130/130A/130B/130C，但是完全覆盖导光元件凸耳121、第一定位柱122A、第二定位柱122B、膜片凸耳131、第一定位孔132A与第二定位孔132B。开口143形成在第二部分142中，而连通第二部分142相对设置的内表面142A与外表面142B，以暴露出凸型空间的限位槽113。在一些实施例中，内表面142A不同于外表面142B。
限位盖150设置于限位槽113中，并包含第一延伸部151及第二延伸部152。限位盖150的尺寸或形状大致对应于限位槽113的尺寸或形状，使得限位盖150可以嵌合在开口143及限位槽113中，或是说开口143及限位槽113一起容置限位盖150。第一延伸部151与第二延伸部152彼此大约 垂直设置，例如第一延伸部151与第二延伸部152之间的夹角约等于90度，使得第一延伸部151沿着Z方向延伸，而且第一延伸部151的尺寸、形状、数量或位置大致对应于开口143的尺寸、形状、数量或位置，使得第一延伸部151可以沿着Z方向穿过前框140的开口143。至于第二延伸部152则沿着X方向与Y方向所在平面延伸至前框140及膜片130B之间。
本实施例所揭露的背光模组1，通过将限位盖150嵌合在承载件110的限位槽113中，并将限位盖150的第一延伸部151穿过前框140的开口143，使得限位盖150能够同时与承载件110以及前框140稳定结合。而且，，限位盖150的第二延伸部152延伸至前框140及膜片130之间，藉此使得前框140及膜片130之间的间隙可以经由限位盖150的第二延伸部152填补，因此膜片130不容易于此处跳脱，达到降低膜片130在此处的跳脱风险的目的。
在一示范性例子中，限位盖150的位置可以设置在承载件110的四个侧边中的某一个侧边上，例如可以设置在承载件110的一个长边上。在一实施例中，一个背光模组100中的限位盖150的数量可以降低到只有一个，并将单个限位盖150设置在承载件110的某个侧边的大约中间的位置，因此，限位盖150不需设计为L型。藉此，不需设置两个L型固定件就能固定导光元件120，可以达到简化背光模组100的结构，减少背光模组100的元件数量，降低材料成本或降低背光模组100制造成本的目的。
图2是绘示依照图1的限位盖150的放大示意图。限位盖150在远离第一延伸部151的一侧，由限位盖150的盖壁153、盖壁154、盖壁155及第二延伸部152一起界定出第二容置空间156，因此限位盖150包含第二容置空间156。第二容置空间156的位置对应于导光元件凸耳121的位置与膜片130/130A/130B/130C的膜片凸耳的位置，例如膜片凸耳131的位置设置，藉此第二容置空间156容置导光元件凸耳121与膜片凸耳131，容置至少一定位柱，例如第一定位柱122A与第二定位柱122B，也容置至少一定位孔，例如第一定位孔132A与第二定位孔132B。限位盖150可以使用柔软有弹性的有机或无机材料制成，因而具有压缩变形的特性，藉此，限位盖150可以紧密地嵌合在开口143及限位槽113中，或是嵌合在内侧壁115及导 光元件120之间，因此，导光元件120便会被限位盖150所限位而减少其移动幅度，可避免信赖性测试或震动实验过程中导光元件120与膜片130之间产生摩擦而造成的发光面伤痕，有效维持发光质量，同时也可达到降低异物进入背光模组100的机会的目的。在一示范性例子中，限位盖150可以使用天然橡胶、人造橡胶、弹性材料或其组合制成，其仅用以示范说明本发明。要说明的是，本实施方式的限位盖150的材料并非用以限制本发明。在其他实施例中，限位盖150亦可利用其他不同材料来制作。
图3是绘示依照图1的承载件110、导光元件120、多张膜片130/130A/130B/130C、前框140、限位盖150以及显示面板200的组合示意图，并绘示沿着图1的A-A’剖面线所剖切的局部剖面图。请同时参照图1、图2及图3，导光元件120、多张膜片130/130A/130B/130C、与限位盖150一起容置于第一容置空间111中。例如，第一容置空间111中沿着Z方向依序容置有膜片130C、导光元件120、膜片130、膜片130A与膜片130B。限位盖150贴着承载件110的内侧壁115设置，而嵌合在内侧壁115及导光元件120之间，并紧密地容置于从第一容置空间111延伸出来的限位槽113中，藉此导光元件120与限位盖150便会彼此限位卡合而减少导光元件120移动幅度，可避免导光元件120与膜片130之间产生摩擦而造成的发光面伤痕，有效维持发光质量，同时也可达到或降低异物进入背光模组100的机会的目的。前框140的第一部分141与外侧壁116平行设置，并结合于外侧壁116。显示面板200设置在前框140上，使得前框140承载显示面板200至少部分的重量。前框140的第二部分142的内表面142A连结限位盖150的第二延伸部152，外表面142B链接显示面板200。
限位盖150的第一延伸部151，可以沿着Z方向穿过前框140的开口143直接接触显示面板200，以承载显示面板200至少部分的重量，例如限位盖150的第一延伸部151可以与前框140一起承载显示面板200的重量。藉此设计，限位盖150不仅可以同时与承载件110以及前框140稳定结合，还能利用第一延伸部151来承载显示面板200，因此限位盖150具有独特的复合式机构效果。如果导光元件120与前框140的第二部分142之间存在空隙144，第二延伸部152沿着X方向与Y方向所在平面延伸至前框140 及膜片130B之间，例如延伸至空隙144中，藉此，第二延伸部152可填入空隙144中，使得前框140及膜片130之间的间隙可以被限位盖150的第二延伸部152填补，由此膜片130不易于此处产生跳脱风险，可避免导光元件120与膜片130之间跳脱摩擦而造成的发光面伤痕，有效维持发光质量，同时第二延伸部152填补间隙也可达到或降低异物经由间隙进入背光模组100的机会的目的。第二延伸部152还可在Z方向上覆盖导光元件凸耳121、第一定位柱122A、膜片凸耳131、与第一定位孔132A。在一示范性例子中，第一定位柱122A卡合第一定位孔132A仅用以示范说明而非用以限制本发明。
当前框140与承载件110组合后，可通过前框140紧密贴合在第二延伸部152上而使得第二延伸部152沿着膜片设置在导光元件120的方向上，例如沿着Z方向，压制膜片，例如压制膜片130B、膜片130A、膜片130，藉此可达到限制膜片在第一容置空间111中晃动的目的。更进一步，第二延伸部152通过压制膜片来间接压制导光元件120，并限制膜片与导光元件120之间的相对位移，藉此可达到限制膜片与导光元件120在第一容置空间111中晃动，或是降低因膜片与导光元件120之间摩擦导致导光元件120刮伤的风险而影响发光质量，或是异音不良的目的。
请参照图4，图4是绘示依照本发明的第二实施方式的显示器的分解示意图。图4中的X方向、Y方向与Z方向分别对应于图1中绘示的X方向、Y方向与Z方向。显示器10还包含限位盖侧11与至少一黏贴侧，例如数个黏贴侧，至少一黏贴侧中的每一者设置有至少一黏胶。例如，黏胶可为长条型，分别对应设置在显示面板200的数个侧边的黏贴侧。在一例子中，黏贴侧的数量为三个，且分别设置在显示面板200非靠近限位盖150的三个侧边。所以，在一示范例子中，显示器10包含靠近限位盖150的限位盖侧11、非靠近限位盖150的黏贴侧12、黏贴侧13与黏贴侧14，其仅用以示范说明本发明。黏胶可以是双面胶的胶带，其仅用以示范说明本发明。要说明的是，本实施方式的限位盖侧11与黏贴侧的位置安排，并非用以限制本发明。在其他实施例中，限位盖侧11的位置与黏贴侧的位置，亦可与本实施例的位置不同。
限位盖侧11、黏贴侧12、黏贴侧13与黏贴侧14可以分别平行或垂直于显示面板200的显示平面的X方向或Y方向。限位盖侧11对应于背光模组100设置限位盖150的位置，例如对应于背光模组100的设有限位槽113的长边。只要显示器10设置有足以固定显示面板200的黏胶，则部分的黏贴侧可以无需设置黏胶，这也可达到与前述相同的目的，故在此不赘述。在一示范例子中，黏贴侧12设置有黏胶12A、黏贴侧13设置有黏胶13A、与黏贴侧14设置有黏胶14A，其仅用以示范说明而非用以限制本发明。显示面板200可以经由至少一黏贴侧设置的至少一黏胶，例如黏胶12A、黏胶13A、与黏胶14A固定在背光模组100上。限位盖侧11可以没有设置黏胶，而是使用限位盖150来取代黏胶的功能来承载显示面板200，藉此可达到降低使用黏胶量的目的，既能降低成本，又能减少边框的贴附面积，可维持窄边框的技术效果。
要说明的是，本实施例所述的导光元件、导光元件凸耳、膜片、膜片凸耳、定位孔、定位柱、限位盖或开口的数量，仅用以示范说明而非用以限制本发明。在其他实施例中，膜片、定位孔或定位柱的数量可依需求而改变。在一些实施例中，膜片可以完全不使用固定胶而只使用定位孔对应定位柱的组合来形成定位结构，且其形状可搭配彼此的形状来设计。
由上述本发明实施例可知，本发明通过将设置于膜片凸耳的至少一定位孔对应地套挂在导光元件凸耳上的至少一定位柱上来进行定位，藉此可提升膜片与导光元件的相对位置的稳固性。此外，在组装过程中，定位孔对应地接合在定位柱上的定位方式，可以减少膜片上所使用固定胶的量。或者，可以在膜片上完全不使用固定胶，而仅用定位孔对应接合在定位柱上的方式来固定膜片与导光元件间的相对位置，以达到省略膜片上使用固定胶的目的。
一方面，利用将帽盖型限位盖固定于承载件的限位槽中，藉此可将背光模组中限位盖的使用数量降低到1个，并依靠限位盖的第二容置空间容置膜片凸耳与导光元件凸耳，而一起固定膜片与导光元件，同时减少在膜片及/或导光元件上使用双面胶的胶带。限位盖的第二延伸部沿Z方向一起压制膜片与导光元件，可藉此限制膜片与导光元件在承载件内部的晃动， 亦可避免膜片与导光元件之间摩擦造成的刮伤风险以及异音不良。
另一方面，前框靠近显示面板的表面增加开口结构，使得帽盖型限位盖的第一延伸部可以穿过开口，并以帽盖型限位盖取代黏胶来承载显示面板。限位盖嵌合在开口及限位槽中，可藉此牵制导光元件的移动幅度，加强膜片的固定强度，改善膜片中的下扩散片与导光元件之间的刮伤，同时可达到限制膜片与导光元件位移的目的。背光模组利用设置限位盖的限位盖侧可以免除设置黏胶，仅利用其余黏贴侧的黏胶来固定显示面板，藉此可达到降低黏胶用量的目的。限位盖本身的材料具有压缩变形的特性，藉此，限位盖可达到同时吸收膜片或导光元件分别来自X方向、Y方向或Z方向的膨胀力，或可避免异物进入背光模组中。如此一来，就可以应用于一般显示器与背光模组的固定结构，降低初期开发的损耗成本，缩短设计部材的制作与测试的需求，加速开发时程，改善部材重工损耗与工时。
以上所述仅为本发明的较佳实施例，凡依本发明权利要求书所做的均等变化与修饰，皆应属本发明的涵盖范围。
【附图标记列表】
10…显示器
10A…显示平面
11…限位盖侧
12…黏贴侧
12A…黏胶
13…黏贴侧
13A…黏胶
14…黏贴侧
14A…黏胶
100…背光模组
110…承载件
111…第一容置空间
113…限位槽
115…内侧壁
116…外侧壁
120…导光元件
121…导光元件凸耳
122A…第一定位柱
122B…第二定位柱
123…表面
130…膜片
130A…膜片
130B…膜片
130C…膜片
131…膜片凸耳
132A…第一定位孔
132B…第二定位孔
140…前框
141…第一部分
142…第二部分
142A…内表面
142B…外表面
143…开口
144…空隙
150…限位盖
151…第一延伸部
152…第二延伸部
153…盖壁
154…盖壁
155…盖壁
156…第二容置空间
200…显示面板。

Claims (12)

  1. 一种可限位膜片与导光元件的背光模组，包含：
    承载件，其包含第一容置空间及内侧壁，所述内侧壁围绕并界定所述第一容置空间，所述内侧壁形成有限位槽；
    导光元件，其容置于所述第一容置空间中；
    膜片，其容置于所述第一容置空间中并设置在所述导光元件上；
    前框，其包含第一部分、第二部分及开口，所述第一部分结合于所述承载件，所述导光元件及所述膜片的至少一部分被所述第二部分所覆盖，所述开口形成在所述第二部分；以及
    至少一限位盖，其嵌合在所述开口及所述限位槽中；
    其中，所述限位盖包含第一延伸部及第二延伸部，所述第一延伸部穿过所述前框的所述开口，以及所述第二延伸部延伸至所述前框及所述膜片之间。
  2. 根据权利要求1所述的可限位膜片与导光元件的背光模组，其中，所述导光元件包含导光元件凸耳及至少一定位柱，所述至少一定位柱设置于所述导光元件凸耳上，所述膜片包含膜片凸耳及至少一定位孔，所述至少一定位孔设置于所述膜片凸耳上，所述膜片通过所述至少一定位孔定位在所述导光元件的所述至少一定位柱上。
  3. 根据权利要求2所述的可限位膜片与导光元件的背光模组，其中，所述限位盖包含第二容置空间，所述第二容置空间容置所述导光元件凸耳。
  4. 根据权利要求3所述的可限位膜片与导光元件的背光模组，其中，所述限位盖的所述第二容置空间容置所述导光元件的所述至少一定位柱。
  5. 根据权利要求2所述的可限位膜片与导光元件的背光模组，其中，所述限位盖包含第二容置空间，所述第二容置空间容置所述膜片凸耳。
  6. 根据权利要求5所述的可限位膜片与导光元件的背光模组，其中，所述限位盖的所述第二容置空间容置所述膜片的所述至少一定位孔。
  7. 根据权利要求1所述的可限位膜片与导光元件的背光模组，其中，所述限位盖嵌合在所述内侧壁及所述导光元件之间。
  8. 根据权利要求1所述的可限位膜片与导光元件的背光模组，其中，所述第二延伸部沿着所述膜片设置于所述导光元件的方向压制所述膜片。
  9. 一种显示器，包含：
    根据权利要求1至8中任一项所述的可限位膜片与导光元件的背光模组；以及
    显示面板，其设置于所述背光模组的上方。
  10. 根据权利要求9所述的显示器，其中，所述前框承载所述显示面板。
  11. 根据权利要求9所述的显示器，更包含：
    限位盖侧；以及
    至少一黏贴侧，所述显示面板经由设置在所述至少一黏贴侧的至少一黏胶固定在所述背光模组上。
  12. 根据权利要求11所述的显示器，其中，设置在所述限位盖侧的所述限位盖穿过所述开口直接接触所述显示面板，以承载所述显示面板。
PCT/CN2022/119823 2022-08-12 2022-09-20 可限位膜片与导光元件的背光模组及显示器 WO2024031785A1 (zh)

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