TW202323945A - Film assembly structure, backlight module and display device - Google Patents

Abstract

A film assembly structure comprises a frame and at least one optical film. The limiting groove of the frame has a first guide surface, and the lug of the optical film is optionally configured in the limiting groove and has a second guide surface. The first and second guide surfaces guide each other so that the optical film is placed in the limiting groove, and the first and second guiding surfaces form a contact part with a non-plane contact in the limiting groove. Through the first and second guide surfaces and the contact part, the optical film can be quickly positioned to the right position without additional tools, avoiding the problem of poor optical performance on the left and right sides of the film. In addition, there is no need to use a film limiting block jig, which can reduce assembly working hours and increase yield. The present invention also provides a backlight module and a display device including the film assembly structure.

Description

Diaphragm assembly structure, backlight module and display device

The present invention relates to a diaphragm assembly structure, in particular to a diaphragm assembly structure used in backlight modules and display devices.

With the increasing consumer demand for visual enjoyment, full-screen liquid crystal display devices have become a popular trend, and catalyze the design of narrow frame structures, driving backlight modules, optical films, display devices, etc. to develop towards lightweight development, and backlight modules In the structure, it is necessary to provide a uniform surface light source through the combination of various optical films and diffusion plates or light guide plates. Among them, the optical diaphragm can improve the luminous efficiency of the entire backlight. Therefore, in order to ensure the accuracy of the diaphragm assembly, in the existing diaphragm assembly process, the diaphragm needs to be centered and positioned with a stopper jig before the diaphragm can be positioned. Carry out gluing and fixing operations to facilitate subsequent processing.

However, when the diaphragm is assembled to the groove of the plastic frame using lugs, it cannot be ensured that it is assembled to the correct position, resulting in the problem of bright lines on the left and right sides and increasing the failure rate of assembly. In addition, the overturning or moving of the limit block must be done manually, which cannot simplify the assembly process, thus increasing the assembly man-hours.

Therefore, the object of the present invention is to provide a diaphragm assembly structure that solves the above problems.

A film assembly structure includes a frame and at least one optical film. The frame includes a limiting wall, the limiting wall has at least one limiting groove, and the limiting groove has a first guiding surface. The optical film has at least one lug, which is detachably arranged in the limiting groove and has a second guide surface, and the first and second guide surfaces guide each other to make the optical film Insert it into the limit slot. Wherein, the first and second guide surfaces form a non-surface-contact contact portion in the limiting groove.

Yet another technical means of the present invention is that the first guide surface defines a first slope at the position of the contact portion, the second guide surface defines a second slope at the position of the contact portion, and the first guide surface defines a second slope at the position of the contact portion. A slope is not equal to the second slope.

Another technical means of the present invention is that the limit groove also has a bottom connected to the first guide surface, the lug also has a protruding surface connected to the second guide surface, and the first guide surface A first angle is formed between the tangent of the contact portion and a horizontal plane parallel to the bottom, the second guide surface has a second angle between the tangent of the contact portion and a horizontal plane parallel to the protruding surface, and The first included angle is an acute angle, and the first included angle is not equal to the second included angle.

Yet another technical means of the present invention is that the second included angle is greater than the first included angle.

Yet another technical means of the present invention lies in that the second included angle is smaller than the first included angle.

Another technical means of the present invention lies in that the second included angle is a right angle.

Yet another technical means of the present invention lies in that the first guiding surface and the second guiding surface are surfaces without curvature respectively.

Yet another technical means of the present invention is that the first guiding surface and the second guiding surface are respectively a surface with curvature, wherein the radius of curvature of the first guiding surface is greater than that of the second guiding surface radius of curvature.

Another technical means of the present invention is that one of the first guiding surface and the second guiding surface is a surface with curvature, and the other is a surface without curvature.

Yet another technical means of the present invention is that the limiting groove also has an opening, the opening and the bottom define an opening width and a bottom width along a first direction, the opening width is larger than the bottom width, the The first guiding surface connects the opening and the bottom, and the lug of the optical film protrudes along a second direction perpendicular to the first direction.

Another technical means of the present invention is that the frame also has two sides parallel to the second direction, and the optical film also has two sides parallel to the second direction, when the first guide surface and the second When the guide surface forms the contact portion in the limiting groove, there is a first distance parallel to the first direction between the two sides of the optical film and the two sides of the frame, and the The two first spacings will be equal.

Another technical means of the present invention lies in that the protruding surface of the lug and the bottom of the limiting groove have a second distance parallel to the second direction, and the second distance is smaller than the first distance.

Another object of the present invention is to provide a backlight module, which includes a light source, an optical plate for receiving the light beam emitted by the light source, and a film assembly structure as mentioned above. Wherein, the optical film is arranged on the optical plate.

Another object of the present invention is to provide a display device, comprising a backlight module as mentioned above, and a display panel disposed on the backlight module.

The effect of the present invention is that, through the first guide surface of the limiting groove and the second guide surface of the lug, the optical film can be quickly centered to the correct position without additional tools, and because the two guides The contact part formed by the guide surface can provide a limit effect, avoiding bad taste and bright line problems on the left and right sides of the diaphragm. In addition, there is no need to use a diaphragm limit stop jig, which can reduce assembly man-hours and increase yield , so as to reduce the deviation rate of diaphragm assembly, improve the convenience of assembly and improve the production yield.

The features and technical contents of the relevant patent applications of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the drawings. Before proceeding with the detailed description, it should be noted that like elements are denoted by the same reference numerals.

Referring to FIG. 1 , it is a first preferred embodiment of the film assembly structure, which includes a frame 1 and an optical film 2 . The frame 1 includes a limiting wall 11 , the limiting wall 11 has a limiting groove 12 , and the limiting groove 12 has a first guiding surface 121 . The optical film 2 has at least one lug 21 , and the lug 21 is detachably disposed in the limiting groove 12 and has a second guiding surface 211 . The first and second guide surfaces 121, 211 are arranged on the same horizontal plane, and provide guidance so that the optical film 2 can be placed in the limiting groove 12 of the frame 1 . The first and second guiding surfaces 121 , 211 form a non-surface-contact contact portion 122 in the limiting groove 12 .

Please refer to FIG. 2 and FIG. 3, the first guide surface 121 defines a first slope at the position of the contact portion 122, and the second guide surface 211 defines a second slope at the position of the contact portion 122, The first slope is not equal to the second slope. In other words, the slope of the first guiding surface 121 may be larger or smaller than the slope of the second guiding surface 211 . Since the first slope and the second slope are not equal, the first guide surface 121 of the frame 1 and the guide surface 211 of the optical film 2 are not arranged in parallel, so the frame 1 and the optical film 2 can be placed on the The contact portions 122 are in contact with each other to form a position-limiting effect.

，該第二導引面211在該接觸部122之切線與平行該突出面212之一水平面之間具有一第二夾角

。由於該第一夾角

為銳角，且該第一夾角

不等於該第二夾角

，使該光學膜片2可藉由該第一導引面121及該第二導引面211往該限位槽12方向移動，且在置入該限位槽12過程中，該凸耳21不會過早與該框架1相互抵接而被限制移動，而順利置入該限位槽12中的正確位置，並使得該凸耳21之突出面212可盡量靠近該限位槽12之底部123。 The limit groove 12 also has a bottom 123 connected to the first guide surface 121, and the lug 21 also has a protruding surface 212 connected to the second guide surface 211, and the first guide surface 121 is in contact with the second guide surface 211. A first angle is formed between the tangent of the portion 122 and a horizontal plane parallel to the bottom 123

, the second guide surface 211 has a second angle between the tangent of the contact portion 122 and a horizontal plane parallel to the protruding surface 212

. Due to the first angle

is an acute angle, and the first included angle

not equal to the second included angle

, so that the optical film 2 can move toward the limit groove 12 through the first guide surface 121 and the second guide surface 211, and during the process of being inserted into the limit groove 12, the lug 21 It will not abut against the frame 1 prematurely and be restricted from moving, but it will be smoothly inserted into the correct position in the limiting groove 12, and the protruding surface 212 of the lug 21 can be as close as possible to the bottom of the limiting groove 12 123.

大於該第一導引面121所形成之第一夾角

。該凸耳21可沿著該第一導引面121及該第二導引面211所形成之導引結構進入該限位槽12中，且該第一導引面121及該第二導引面2111可於該限位槽12之中形成該接觸部122，使該光學膜片2抵靠在該框架1上，達到限位作用。 In this embodiment, the first guiding surface 121 and the second guiding surface 211 are respectively a surface without curvature, and the second included angle formed by the second guiding surface 211

greater than the first included angle formed by the first guide surface 121

. The lug 21 can enter the limiting groove 12 along the guide structure formed by the first guide surface 121 and the second guide surface 211, and the first guide surface 121 and the second guide surface The surface 2111 can form the contact portion 122 in the limiting groove 12, so that the optical film 2 can abut against the frame 1 to achieve a limiting effect.

The limiting groove 12 also has an opening 124, the opening 124 and the bottom 123 define an opening width and a width of the bottom 123 along a first direction X, and the first guiding surface 121 connects the opening 124 and the bottom 123. The bottom 123 , the lug 21 of the optical film 2 protrudes along a second direction Y perpendicular to the first direction X. Since the opening width of the limiting groove 12 is larger than the width of the bottom 123, the lug 21 can move toward or away from the limiting groove 12 along the second direction Y, and the optical film 2 can be easily disassembled or quickly assembled together with the frame 1. When the optical film 2 is assembled with the frame 1, the lug 21 can approach the bottom 123 of the limiting groove 12, and form the contact portion 122 on the first guiding surface 121 to achieve quick positioning .

It can be seen from the above description that the lug 21 of the optical film 2 abuts against the contact portion 122 of the frame 1, thereby restricting the movement of the optical film 2 and providing a position-limiting effect, so the optical film 2 does not need additional positioning The tool can be limited and fixed in the correct position in the limit groove 12 of the frame 1 through the contact portion 122 formed by the two guide surfaces 121, 211, without displacement, without using a diaphragm limit stopper The jig can simultaneously shorten the assembly man-hour, reduce the deviation rate of diaphragm assembly, and increase the yield.

Please refer to FIG. 4, it is worth mentioning that the frame 1 also has two sides 13 parallel to the second direction Y, and the optical film 2 also has two sides 22 parallel to the second direction Y. There is a first distance D1 parallel to the first direction X between the two sides 22 of the frame 1 and the two sides 13 of the frame 1 respectively. When the lug 21 is placed in the limiting groove 12 and the first guiding surface 121 and the second guiding surface 211 form the contact portion 122 in the limiting groove 12, the two first distances D1 will be equal, so that the optical film 2 can be set in the center of the frame 1, thereby reducing the alignment procedure and the problem of bright lines on the left and right sides, and improving the convenience of assembly.

When the lug 21 of the optical film 2 abuts against the limiting groove 12 of the frame 1, the protruding surface 212 of the lug 21 and the bottom 123 of the limiting groove 12 have a direction parallel to the second direction Y. The second distance D2. Considering that the optical film 2 will expand and contract due to assembly process tolerances or environmental factors, it is necessary to reserve a tolerance space. When the optical film 2 is heated and expanded, the optical film 2 will The degree of expansion and contraction of the two sides 22 is larger than the change of the lug 21 of the optical film 2 in the second direction Y. Therefore, the second distance D2 is smaller than the first distance D1, so that the first distance D1 can be used as a tolerance for the assembly process or the expansion and contraction of the optical film, and it is not easy to change the distance due to thermal expansion and contraction, which affects the optical quality. .

小於第一夾角

，且當該第一導引面121與該第二導引面211相接觸時，該接觸部122形成於該第二導引面211上，藉此使該光學膜片2抵靠在該框架1上，達到限位作用。在此種情形下，由於該第二夾角

小於第一夾角

，該光學膜片2之凸耳21的傾斜部分較小，所以進入到該開口部124的部分也是較少的，因此，圖5的該第二間距D2相較於圖3的該第二間距D2是更大的，圖3所示的實施例因為該第二間距D2更小，而產生更為窄額緣、窄邊框的效果。 Referring to Fig. 5, it is a second preferred embodiment of the diaphragm assembly structure, the second preferred embodiment is substantially the same as the first preferred embodiment, and the same will not be described in detail here, the difference is that , the second angle

less than the first included angle

, and when the first guide surface 121 is in contact with the second guide surface 211, the contact portion 122 is formed on the second guide surface 211, thereby making the optical film 2 abut against the frame 1, to achieve the limit function. In this case, due to the second angle

less than the first included angle

, the inclined portion of the lug 21 of the optical film 2 is relatively small, so the portion entering the opening 124 is also relatively small. Therefore, the second distance D2 of FIG. 5 is compared with the second distance D2 of FIG. 3 D2 is larger, and the embodiment shown in FIG. 3 produces the effect of a narrower frontal edge and a narrower frame because the second distance D2 is smaller.

為直角。在此種情形下，該光學膜片2同樣可以抵靠在該框架1上，達到限位作用。除此之外，因為該第二夾角

大於第一夾角

，甚至該第二夾角

是形成直角，所以，該第二導引面211可以有更大的部分進入到該開口部124，而不會被該第一導引面121所阻擋。因此，相較於圖5的狀態，圖6所示的實施例的該第二間距D2可以比圖5所示的實施例更小，產生窄額緣、窄邊框的效果。 Referring to Fig. 6, it is a third preferred embodiment of the membrane assembly structure, wherein the third preferred embodiment is substantially the same as the first preferred embodiment, the same is not described in detail here, the difference In that, the second angle

is a right angle. In this case, the optical film 2 can also abut against the frame 1 to achieve a position-limiting effect. In addition, because the second angle

greater than the first included angle

, and even the second angle

It forms a right angle, so a larger portion of the second guiding surface 211 can enter the opening 124 without being blocked by the first guiding surface 121 . Therefore, compared with the state of FIG. 5 , the second distance D2 of the embodiment shown in FIG. 6 can be smaller than that of the embodiment shown in FIG. 5 , resulting in the effect of narrow frontal margin and narrow frame.

Furthermore, as compared with the two embodiments of Fig. 3 and 6, in Fig. 3, the upper area A1 where the first guide surface 121 contacts the second guide surface 211 is covered by the convexity of the optical film 2. The oblique part of ear 21 is covered, on the contrary Fig. 6 is in this first guide surface 121 and this second guide surface 211 contact upper area A1, because the lug 21 of this optical film 2 does not have oblique part, so Can not cover this area, this area just produces light leakage phenomenon easily, therefore, the embodiment shown in Fig. 3 can compare the embodiment shown in Fig. Effectively solve the problem of light leakage.

Referring to Fig. 7, it is a fourth preferred embodiment of the diaphragm assembly structure, wherein the fourth preferred embodiment is substantially the same as the first preferred embodiment, the same is not described in detail here, the difference That is, the first guiding surface 121 is a surface without curvature, and the second guiding surface 211 is a surface with curvature.

As compared with the two embodiments of Fig. 6 and 7, in Fig. 7, the upper area A1 and the lower area A2 where the first guide surface 121 and the second guide surface 211 are in contact are covered by the optical film 2 The arc portion of the lug 21 of the optical film 2 is covered, whereas in FIG. 6 the upper area A1 and the lower area A2 where the first guide surface 121 and the second guide surface 211 are in contact, because the lug of the optical film 2 21 does not have a circular arc portion, so the shielding area of the upper area A1 and the lower area A2 cannot be further increased, and the upper area A1 and the lower area A2 are prone to light leakage. Therefore, the embodiment shown in FIG. 7 can be compared with that shown in FIG. 6 In the illustrated embodiment, the arc portion of the lug 21 of the optical film 2 can be used to further increase the shielding light leakage area to effectively solve the light leakage problem.

Referring to Fig. 8, it is a fifth preferred embodiment of the diaphragm assembly structure, wherein the fifth preferred embodiment is substantially the same as the fourth preferred embodiment, and the same points will not be described in detail here, and the differences That is, the first guiding surface 121 and the second guiding surface 211 are surfaces with curvature respectively.

As compared with the two embodiments of FIG. 7 and 8 , in FIG. 8 , the upper area A1 and the lower area A2 where the first guide surface 121 and the second guide surface 211 are in contact, compared with those shown in FIG. 7 , Since the curvature radius R1 of the first guide surface 121 in FIG. 8 is greater than the curvature radius R2 of the second guide surface 211, both the upper area A1 and the lower area A2 of FIG. 8 can be further covered by the optical film 2 The arc portion of the lug 21 is more shaded, therefore, the embodiment shown in FIG. 8 can be more than the embodiment shown in FIG. 7, and the light leakage area can be shaded more.

Referring to FIG. 9 , it is a backlight module of the present invention, which simply shows that it includes a light source 3 , an optical plate 4 for receiving the light beam emitted by the light source 3 , and the film assembly structure formed by the optical film 2 . Wherein, the optical film 2 is disposed on the optical plate 4 .

Referring to FIG. 10 , a display device is disclosed, which simply shows that it includes the above-mentioned backlight module and a display panel 5 disposed on the backlight module.

小於第一夾角

、該第二夾角

大於第一夾角

，或是該第二夾角

等於直角，皆可以適用本發明之膜片組裝結構，以達到客製化之需求。此外本發明除了揭露膜片組裝結構的五個較佳實施例之外，也能因應客戶或實際需求，組裝有該光學膜片2的背光模組，或是生產製造顯示裝置。 It can be seen from the above that no matter whether the first guide surface 121 of the limiting groove 12 or the second guide surface 211 of the lug 21 has curvature, the second included angle

less than the first included angle

, the second angle

greater than the first included angle

, or the second angle

It is equal to a right angle, and the diaphragm assembly structure of the present invention can be applied to meet the needs of customization. In addition, in addition to disclosing five preferred embodiments of the film assembly structure, the present invention can also assemble a backlight module with the optical film 2 or manufacture a display device according to customer or actual needs.

In summary, the film assembly structure, backlight module and display device of the present invention, through the first guide surface 121 of the limiting groove 12 and the second guide surface 211 of the lug 21, the optical film 2 It can be centered quickly without additional tools, and the contact portion 122 formed by the two guide surfaces 121, 211 can provide a limit effect, thereby reducing the deflection rate of diaphragm assembly, improving assembly convenience and improving Production yield. At the same time, the first distance D1 can be used as an assembly process or as a margin for the expansion and contraction of the optical film 2. It is not easy to change the distance due to thermal expansion and contraction, which will affect the optical taste. This design concept can also be used in Internal panels such as diffusion panels or light guide panels.

But the above are only five preferred embodiments of the present invention, and should not limit the scope of the present invention with this, that is, all the simple equivalent changes made according to the patent scope of the present invention and the description of the invention Modifications still fall within the scope covered by the patent of the present invention.

:第一夾角

:第二夾角 A1:上方區域 A2:下方區域 D1:第一間距 D2:第二間距 R1,R2:曲率半徑 X:第一方向 Y:第二方向 1: frame 11: limit wall 12: limit groove 121: first guide surface 122: contact part 123: bottom 124: opening 2: optical film 21: lug 211: second guide surface 212: protruding Surface 22: Side 3: Light source 4: Optical board 5: Display panel

: first angle

: second angle A1: upper area A2: lower area D1: first distance D2: second distance R1, R2: radius of curvature X: first direction Y: second direction

Fig. 1 is a perspective view, which is a first preferred embodiment of the diaphragm assembly structure of the present invention; Fig. 2 is a plan view illustrating the positional relationship between a frame and an optical film. Fig. 3 is a partially enlarged view, assisting in explaining Fig. 2; Fig. 4 is a schematic diagram illustrating the positional relationship between the two sides of the frame and the two sides of the optical film. Fig. 5 is a partially enlarged view, which is a second preferred embodiment of the diaphragm assembly structure of the present invention; Fig. 6 is a partially enlarged view, which is a third preferred embodiment of the diaphragm assembly structure of the present invention; Fig. 7 is a partially enlarged view, which is a fourth preferred embodiment of the diaphragm assembly structure of the present invention; Fig. 8 is a partially enlarged view, which is a fifth preferred embodiment of the diaphragm assembly structure of the present invention; Fig. 9 is a schematic side view, which is a preferred embodiment of the backlight module of the present invention; and Fig. 10 is a schematic side view of a preferred embodiment of the display device of the present invention.

1: frame

12: limit slot

121: The first guide surface

123: bottom

124: opening

2: Optical film

21: Lugs

211: Second guiding surface

X: first direction

Y: the second direction

Claims (14)

A diaphragm assembly structure, comprising: A frame, including a limiting wall, the limiting wall has at least one limiting groove, and the limiting groove has a first guiding surface; and At least one optical film has at least one lug, the lug is detachably arranged in the limiting groove and has a second guide surface, the first and second guide surfaces guide each other to make the optical film Insert the piece into the limit slot; Wherein, the first and second guide surfaces form a non-surface-contact contact portion in the limiting groove. The diaphragm assembly structure according to claim 1, wherein the first guide surface defines a first slope at the position of the contact portion, and the second guide surface defines a second slope at the position of the contact portion. slope, the first slope is not equal to the second slope. The diaphragm assembly structure according to claim 1, wherein the limiting groove also has a bottom connected to the first guiding surface, the lug also has a protruding surface connected to the second guiding surface, and the first guiding surface A guide surface forms a first angle between the tangent of the contact portion and a horizontal plane parallel to the bottom, and the second guide surface has a first angle between the tangent of the contact portion and a horizontal plane parallel to the protruding surface. Two included angles, and the first included angle is an acute angle, and the first included angle is not equal to the second included angle. The diaphragm assembly structure according to claim 3, wherein the second included angle is larger than the first included angle. The diaphragm assembly structure according to claim 3, wherein the second included angle is smaller than the first included angle. The diaphragm assembly structure according to claim 3, wherein the second included angle is a right angle. The diaphragm assembly structure according to any one of claims 1 to 6, wherein the first guiding surface and the second guiding surface are surfaces without curvature respectively. The diaphragm assembly structure according to any one of claims 1 to 6, wherein the first guide surface and the second guide surface are respectively a surface with curvature, wherein the first guide surface The radius of curvature is greater than the radius of curvature of the second guiding surface. The membrane assembly structure according to any one of claims 1 to 6, wherein one of the first guide surface and the second guide surface is a surface with curvature, and the other is A face with no curvature. The diaphragm assembly structure according to claim 3, wherein the limiting groove further has an opening, and the opening and the bottom define an opening width and a bottom width along a first direction, and the opening width is larger than the The width of the bottom, the first guiding surface connects the opening and the bottom, and the lug of the optical film protrudes along a second direction perpendicular to the first direction. The film assembly structure according to claim 10, wherein the frame also has two sides parallel to the second direction, and the optical film also has two sides parallel to the second direction, when the first guide surface And when the second guide surface forms the contact portion in the limiting groove, there is a first direction parallel to the first direction between the two sides of the optical film and the two sides of the frame. spacing, and the two first spacings will be equal. The diaphragm assembly structure as claimed in claim 11, wherein the protruding surface of the lug and the bottom of the limiting groove have a second distance parallel to the second direction, and the second distance is smaller than the first distance one pitch. A backlight module, comprising a light source, an optical plate for receiving the light beam emitted by the light source, and the film assembly structure described in any one of claim 1 to claim 12, wherein the optical film is set on the optical plate. A display device, comprising a backlight module as set forth in claim 13, and a display panel arranged on the backlight module.

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