技术领域technical field
本发明是关于一种背光模块，特别是一种提高光学辉度的背光模块。The invention relates to a backlight module, in particular to a backlight module with improved optical luminance.
背景技术Background technique
一般显示装置需要设置背光模块，来提供光源于显示装置，且背光模块的光学辉度与均匀度皆会影响显示装置的影像显示效果。于背光模块中，为了能够将光源的光线使用率达到最佳化，导光板会尽可能与光源贴近，使得导光板与光源之间没有间隙存在。如此一来，能够将光线的使用率达到最佳化，以提升光学辉度，进而增加影像显示的清晰度。Generally, a display device needs to be equipped with a backlight module to provide a light source for the display device, and the optical brightness and uniformity of the backlight module will affect the image display effect of the display device. In the backlight module, in order to optimize the light utilization rate of the light source, the light guide plate is as close as possible to the light source so that there is no gap between the light guide plate and the light source. In this way, the utilization rate of light can be optimized to increase the optical luminance, thereby increasing the clarity of image display.
然而，导光板会有遇热膨胀的材料特性，在热胀冷缩的过程中，往往会使得导光板无法紧邻光源，亦即光源与导光板之间会形成间隙，而影响光学辉度。请参阅图1(a)，图1(a)为遇热状态的背光模块。图1(a)中，背光模块10包含导光板11、光源13、框体15与固定件17，其中导光板11与光源13容纳于框体15中，且导光板11可透过固定件17而定位于框体15。光源13设置且电性连接于电路板12，外部的控制系统可透过电路板12来操控光源13的启闭。光源13与框体15之间则设有遮光片14，来减少漏光；而导光板11与框体15之间亦设有反射片16，助于光线能够透过反射片16而再加以利用。However, the light guide plate has material characteristics of thermal expansion. During the process of thermal expansion and contraction, the light guide plate is often unable to be close to the light source, that is, a gap is formed between the light source and the light guide plate, which affects the optical brightness. Please refer to FIG. 1(a). FIG. 1(a) is a backlight module in a heated state. In FIG. 1(a), the backlight module 10 includes a light guide plate 11, a light source 13, a frame body 15 and a fixing member 17, wherein the light guide plate 11 and the light source 13 are accommodated in the frame body 15, and the light guide plate 11 can pass through the fixing member 17. And be positioned at frame body 15. The light source 13 is disposed and electrically connected to the circuit board 12 , and an external control system can control the light source 13 to be turned on and off through the circuit board 12 . A shading sheet 14 is provided between the light source 13 and the frame body 15 to reduce light leakage; and a reflective sheet 16 is also provided between the light guide plate 11 and the frame body 15 to help light pass through the reflective sheet 16 for reuse.
在一般的设计中，导光板11与光源13之间并无间隙存在。当导光板11遇热膨胀时，导光板11的入光端18受限于光源13的存在，而没有空间可膨胀沿伸。因此，导光板11在高温的环境中，导光板11的末端19会往外沿伸，而形成热胀的现象，如图1(a)所示。In a general design, there is no gap between the light guide plate 11 and the light source 13 . When the light guide plate 11 expands due to heat, the light incident end 18 of the light guide plate 11 is limited by the existence of the light source 13 , and there is no room for expansion. Therefore, when the light guide plate 11 is in a high-temperature environment, the end 19 of the light guide plate 11 will extend outward, resulting in thermal expansion, as shown in FIG. 1( a ).
然而，当导光板11从高温的环境中，渐渐降温而恢复到常温或理想温度时，导光板11则会从热胀的形状渐渐恢复成原始状态，亦为冷缩的反应。此时，导光板11的末段19因受到固定件17的影响，而固定于框体17上，无法产生缩回原始的位置。因此，导光板11的入光端18及受到冷缩反应而产生位移，而造成导光板11与光源13之间有间隙g的产生，如图1(b)所示。如此，当背光模块10从高温慢慢降温而恢复到常温时，受到热胀冷缩的影响，导光板11与光源13之间会渐渐地产生间隙g，造成光线的损失而降低辉度。However, when the light guide plate 11 gradually cools down from a high temperature environment and returns to normal temperature or an ideal temperature, the light guide plate 11 will gradually return to its original state from the thermally expanded shape, which is also a reaction of cold shrinkage. At this time, the end section 19 of the light guide plate 11 is fixed on the frame body 17 due to the influence of the fixing member 17, and cannot be retracted to the original position. Therefore, the light-incident end 18 of the light guide plate 11 is displaced due to the cold shrinkage reaction, resulting in a gap g between the light guide plate 11 and the light source 13 , as shown in FIG. 1( b ). In this way, when the backlight module 10 cools down slowly from high temperature and returns to normal temperature, due to thermal expansion and contraction, a gap g will gradually form between the light guide plate 11 and the light source 13 , resulting in loss of light and reduced luminance.
发明内容Contents of the invention
本发明在于提供一种背光模块，于热胀冷缩的情况下，依旧能保持高辉度、高光线利用率。The present invention provides a backlight module, which can still maintain high luminance and high light utilization rate under the condition of heat expansion and contraction.
本发明在于提供一种背光模块，光源与导光板之间能够维持零间隙，不受环境温度的影响。The present invention provides a backlight module, which can maintain a zero gap between the light source and the light guide plate, and is not affected by the ambient temperature.
本发明的一实施例所揭露的背光模块，包含导光板、光源、框体以及固定件。导光板具有入光面、出光面与定位面，且入光面分别邻接出光面与定位面。定位面则具有入光区与定位斜面区，且定位斜面区相对于出光面为倾斜面。光源设置于入光面，且容纳于框体。固定件具有粘着顶面，且设置于定位斜面区，以将导光板固定于框体，其中粘着顶面与定位斜面区具有相同斜率。A backlight module disclosed by an embodiment of the present invention includes a light guide plate, a light source, a frame and a fixing member. The light guide plate has a light incident surface, a light exit surface and a positioning surface, and the light incident surface is adjacent to the light exit surface and the positioning surface respectively. The positioning surface has a light incident area and a positioning slope area, and the positioning slope area is an inclined surface relative to the light emitting surface. The light source is arranged on the light incident surface and accommodated in the frame. The fixing part has an adhesive top surface and is arranged on the positioning slope area to fix the light guide plate to the frame body, wherein the adhesive top surface and the positioning slope area have the same slope.
本发明的另一实施例所揭露的背光模块，包含楔形导光板、光源、框体以及固定件。导光板具有入光区与定位斜面区，且入光区的厚度小于定位斜面区的厚度。光源设置于楔形导光板的周边，且邻近入光区，使得入光区位于光源与定位斜面区之间。框体具有夹持部与底部，而光源容纳于夹持部，且夹持部固定于楔形导光板的入光区。固定件设置于定位斜面区与底部之间，其中固定件具有直角梯形截面。A backlight module disclosed in another embodiment of the present invention includes a wedge-shaped light guide plate, a light source, a frame and a fixing member. The light guide plate has a light incident area and a positioning slope area, and the thickness of the light incident area is smaller than that of the positioning slope area. The light source is arranged on the periphery of the wedge-shaped light guide plate and adjacent to the light incident area, so that the light incident area is located between the light source and the positioning slope area. The frame body has a clamping portion and a bottom, and the light source is accommodated in the clamping portion, and the clamping portion is fixed on the light incident area of the wedge-shaped light guide plate. The fixing piece is arranged between the positioning slope area and the bottom, wherein the fixing piece has a right-angled trapezoidal section.
以下结合附图和具体实施例对本发明进行详细描述，但不作为对本发明的限定。The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
附图说明Description of drawings
图1(a)为现有背光模块于高热膨胀的示意图。FIG. 1( a ) is a schematic diagram of a conventional backlight module under high thermal expansion.
图1(b)为现有背光模块从高热膨胀恢复于常温的示意图。FIG. 1( b ) is a schematic diagram of a conventional backlight module recovering from high thermal expansion to normal temperature.
图2为本发明的一实施例的背光模块的侧视图。FIG. 2 is a side view of a backlight module according to an embodiment of the present invention.
图3(a)为本发明的一实施例的背光模块于高热膨胀的示意图。FIG. 3( a ) is a schematic diagram of a backlight module under high thermal expansion according to an embodiment of the present invention.
图3(b)为本发明的一实施例的背光模块从高热膨胀恢复于常温的示意图。FIG. 3( b ) is a schematic diagram of a backlight module recovering from high thermal expansion to normal temperature according to an embodiment of the present invention.
图4(a)为本发明的一实施例中的背光模块的导光板示意图。FIG. 4( a ) is a schematic diagram of a light guide plate of a backlight module in an embodiment of the present invention.
图4(b)为本发明的一实施例中的背光模块的导光板示意图。FIG. 4( b ) is a schematic diagram of a light guide plate of a backlight module in an embodiment of the present invention.
图5(a)为本发明的一实施例中的背光模块的固定件示意图。FIG. 5( a ) is a schematic diagram of the fixing part of the backlight module in an embodiment of the present invention.
图5(b)为本发明的另一实施例中的背光模块的固定件示意图。FIG. 5( b ) is a schematic diagram of a fixing member of a backlight module in another embodiment of the present invention.
图6(a)为本发明的一实施例的背光模块的俯视图。FIG. 6( a ) is a top view of a backlight module according to an embodiment of the present invention.
图6(b)为本发明的另一实施例的背光模块的俯视图。FIG. 6( b ) is a top view of a backlight module according to another embodiment of the present invention.
图7(a)为本发明的另一实施例的背光模块的俯视图。FIG. 7( a ) is a top view of a backlight module according to another embodiment of the present invention.
图7(b)为本发明的另一实施例的背光模块的俯视图。FIG. 7( b ) is a top view of a backlight module according to another embodiment of the present invention.
图8(a)为本发明的另一实施例的背光模块的导光板示意图。FIG. 8( a ) is a schematic diagram of a light guide plate of a backlight module according to another embodiment of the present invention.
图8(b)为本发明的另一实施例的背光模块的导光板示意图。FIG. 8( b ) is a schematic diagram of a light guide plate of a backlight module according to another embodiment of the present invention.
其中，附图标记Among them, reference signs
10、100、200、300背光模块10, 100, 200, 300 backlight modules
11、110、210、310、410、510导光板11, 110, 210, 310, 410, 510 light guide plate
12、120、220、320电路板12, 120, 220, 320 circuit boards
13、130、230、330光源13, 130, 230, 330 light sources
14、140、240、340遮光片14, 140, 240, 340 shading film
15、150、250、350框体15, 150, 250, 350 frames
16、160、260、360反射板16, 160, 260, 360 reflectors
17、170、270、370固定件17, 170, 270, 370 fixing parts
18入光端18 incident light end
19末端19 end
111、211、311、411、511入光面111, 211, 311, 411, 511 incident surface
112、212、312、411、511出光面112, 212, 312, 411, 511 light exit surface
113、213、313、413、513定位面113, 213, 313, 413, 513 positioning surface
114、214、314、414、514入光区114, 214, 314, 414, 514 incident area
115、215、315、415、515定位斜面区115, 215, 315, 415, 515 positioning slope area
151夹持部151 clamping part
152底部152 bottom
170固定件170 fixing parts
171粘着顶面171 Adhesive top surface
172基材172 base material
173、174胶层173, 174 adhesive layer
253侧部253 side
354凸出元件354 protruding components
416、516入光斜面416, 516 light incident slope
A、a、L长度A, a, L length
B、b、H、h厚度B, b, H, h thickness
g间隙g-gap
X水平方向X horizontal direction
Z垂直方向Z vertical direction
具体实施方式detailed description
下面结合附图和具体实施例对本发明技术方案进行详细的描述，以更进一步了解本发明的目的、方案及功效，但并非作为本发明所附权利要求保护范围的限制。The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the appended claims of the present invention.
请参阅图2，图2为本发明的一实施例的背光模块的侧视图。于本实施例中，背光模块100包含导光板110、光源130、框体150与固定件170，其中导光板110具有入光面110、出光面112与定位面113。导光板110的定位面113具有入光区114与定位斜面区115，且定位斜面区115相对出光面112而言为倾斜面。具体而言，导光板110为楔形导光板，于入光区114中，出光面112与定位面113为呈现平行的两平面，但于定位斜面区115中，出光面112与定位面113为呈现非平行的两平面。举例而言，如出光面112为水平面时，定位面113于定位斜面区115则为倾斜面。换言之，以出光面112与定位面113之间的垂直距离视为导光板110的厚度时，则入光区114的导光板厚度会小于定位斜面区115的导光板厚度。Please refer to FIG. 2 , which is a side view of a backlight module according to an embodiment of the present invention. In this embodiment, the backlight module 100 includes a light guide plate 110 , a light source 130 , a frame 150 and a fixing member 170 , wherein the light guide plate 110 has a light incident surface 110 , a light exit surface 112 and a positioning surface 113 . The positioning surface 113 of the light guide plate 110 has a light incident region 114 and a positioning slope region 115 , and the positioning slope region 115 is an inclined surface relative to the light emitting surface 112 . Specifically, the light guide plate 110 is a wedge-shaped light guide plate. In the light incident area 114, the light output surface 112 and the positioning surface 113 are two parallel planes. Two non-parallel planes. For example, if the light emitting surface 112 is a horizontal plane, the positioning surface 113 in the positioning slope area 115 is an inclined surface. In other words, when the vertical distance between the light exit surface 112 and the positioning surface 113 is regarded as the thickness of the light guide plate 110 , the thickness of the light guide plate in the light incident area 114 is smaller than the thickness of the light guide plate in the positioning slope area 115 .
于本实施例中，光源130设置于导光板110的入光面110。详言之，光源130搭配导光板110为侧入光式的组合，光源130设置于导光板110的周边，且邻近入光区114，使得入光区114位于光源130与定位斜面区115。框体150具有夹持部151与底部152，而光源容纳于夹持部151，且夹持部151固定导光板110的入光区114于框体150。具体而言，背光模块100具有遮光片140、电路板120与反射片160，而遮光片140位于夹持部151与光源130之间，且可延伸至导光板110上方。遮光片140可为吸光或反射材质，且可其表面可具有胶层，便于将遮光片固定于框体150内侧、导光板110与光源130。藉由遮光片140或框体150本身的夹持力，导光板110的入光区114可固定于框体150内。请参阅图2，光源130设置于电路板120上方，且光源130与电路板120可电性导通，使得外部控制电路或系统可透过电路板120来开启光源130。反射片160位于导光板110与框体150的底部152之间，可助于光线的重复利用。In this embodiment, the light source 130 is disposed on the light incident surface 110 of the light guide plate 110 . To be more specific, the light source 130 and the light guide plate 110 are a side-light combination. The light source 130 is arranged around the light guide plate 110 and adjacent to the light incident area 114 , so that the light incident area 114 is located between the light source 130 and the positioning slope area 115 . The frame body 150 has a clamping portion 151 and a bottom 152 , and the light source is accommodated in the clamping portion 151 , and the clamping portion 151 fixes the light incident area 114 of the light guide plate 110 on the frame body 150 . Specifically, the backlight module 100 has a light-shielding sheet 140 , a circuit board 120 and a reflective sheet 160 , and the light-shielding sheet 140 is located between the clamping portion 151 and the light source 130 and can extend above the light guide plate 110 . The light-shielding sheet 140 can be made of light-absorbing or reflective material, and can have an adhesive layer on its surface, so as to fix the light-shielding sheet on the inner side of the frame body 150 , the light guide plate 110 and the light source 130 . With the clamping force of the light-shielding sheet 140 or the frame body 150 itself, the light incident area 114 of the light guide plate 110 can be fixed in the frame body 150 . Please refer to FIG. 2 , the light source 130 is disposed above the circuit board 120 , and the light source 130 and the circuit board 120 are electrically connected, so that an external control circuit or system can turn on the light source 130 through the circuit board 120 . The reflective sheet 160 is located between the light guide plate 110 and the bottom 152 of the frame body 150 , which can facilitate the reuse of light.
请参阅图2的实施例，导光板110的定位面113与出光面112为入光面11的相对两侧，亦即出光面112为导光板110的顶面，而定位面113为导光板110的底面。固定件170则位于定位面113与框体150的底部152之间，用来将导光板110固定于底部152。具体而言，固定件170具有粘着顶面171，且固定件170设置于定面斜面区115，以将导光板110固定于框体150，其中粘着顶面171与定位斜面区115具有相同斜率，使得定位斜面区115与粘着顶面171的结构互补，可让粘着顶面171与定位斜面区115紧密接触而达到固定作用。于本实施例中，导光板110的底面设有定位斜面区115，透过有相同斜率的粘着顶面171的固定件170来定位于框体150，则可让导光板110在经过高热膨胀后，恢复于理想温度或常温时，导光板110与光源130之间维持零间隙，达到较佳的高辉度。Please refer to the embodiment of FIG. 2 , the positioning surface 113 and the light-emitting surface 112 of the light guide plate 110 are opposite sides of the light-incident surface 11, that is, the light-emitting surface 112 is the top surface of the light guide plate 110, and the positioning surface 113 is the light guide plate 110. the underside. The fixing member 170 is located between the positioning surface 113 and the bottom 152 of the frame body 150 for fixing the light guide plate 110 to the bottom 152 . Specifically, the fixing part 170 has an adhesive top surface 171, and the fixing part 170 is disposed on the fixed surface slope area 115 to fix the light guide plate 110 to the frame body 150, wherein the adhesive top surface 171 and the positioning slope area 115 have the same slope, The structure of the positioning slope area 115 is complementary to the adhesive top surface 171 , so that the adhesive top surface 171 is in close contact with the positioning slope area 115 to achieve a fixing effect. In this embodiment, the bottom surface of the light guide plate 110 is provided with a positioning slope area 115, which is positioned on the frame body 150 through the fixing piece 170 with the same slope that is adhered to the top surface 171, so that the light guide plate 110 can undergo high thermal expansion. , when returning to the ideal temperature or normal temperature, the gap between the light guide plate 110 and the light source 130 is maintained to achieve a better high luminance.
请参阅第3(a)与3(b)图，图3(a)与图3(b)分别为本发明的一实施例的背光模块于高热膨胀与从高热膨胀恢复于常温的示意图。当背光模块处于高热膨胀时，导光板110的定位斜面区115会往外膨胀，如图3(a)所示。由于定位斜面区115与固定件150的粘着顶面171具有相同斜率，使得在组装状态时，定位斜面区115可与固定件150紧密接触而相互固定。当定位斜面区115受到高温影响而发生往外膨胀时，定位斜面区115即会与固定件150分离。具体而言，定位斜面区115与粘着顶面171为斜率大于零的斜面，因此，当定位斜面区115往外膨胀时，会与粘着顶面171之间渐渐产生间隙，而相互不接触以形成分离状态。当背光模块100从高温环境恢复于理想温度或室温时，温度下降而造成导光板110冷缩现象时，如图3(b)所示，定位斜面区115会往内收缩而恢复到原本的状态。具体而言，由于高热状态时，定位斜面区115与固定件170为分离状态，而定位斜面区115并未被固定于框体150。因此，当导光板110有冷缩时，相较于被夹持部151固定住的入光区114而言，定位斜面区115具有较大的空间、较小的定位拘限力而可形成收缩的现象。如此一来，在温度恢复于理想温度或室温时，导光板的收缩行为会发生于定位斜面区115，而非发生于入光区114，则光源130与导光板110之间可保持紧密接触、零间隙，进而减少漏光、保持高辉度与光线利用率。Please refer to FIG. 3(a) and FIG. 3(b). FIG. 3(a) and FIG. 3(b) are schematic diagrams of the backlight module of an embodiment of the present invention under high thermal expansion and returning to normal temperature from high thermal expansion. When the backlight module is under high thermal expansion, the positioning slope area 115 of the light guide plate 110 will expand outward, as shown in FIG. 3( a ). Since the positioning slope region 115 has the same slope as the adhesive top surface 171 of the fixing member 150 , the positioning slope region 115 can be in close contact with the fixing member 150 to be fixed to each other in an assembled state. When the positioning slope area 115 expands outward due to high temperature, the positioning slope area 115 will be separated from the fixing member 150 . Specifically, the positioning slope area 115 and the adhesive top surface 171 are inclined surfaces with a slope greater than zero. Therefore, when the positioning slope area 115 expands outward, a gap will gradually be generated between the positioning slope area 115 and the adhesive top surface 171, and they will not contact each other to form separation. state. When the backlight module 100 returns to the ideal temperature or room temperature from the high temperature environment, when the temperature drops and causes the light guide plate 110 to shrink, as shown in FIG. . Specifically, due to the high heat state, the positioning slope area 115 is separated from the fixing member 170 , and the positioning slope area 115 is not fixed to the frame body 150 . Therefore, when the light guide plate 110 shrinks, compared with the light incident area 114 fixed by the clamping part 151, the positioning slope area 115 has a larger space and a smaller positioning constraint force to form shrinkage. The phenomenon. In this way, when the temperature returns to the ideal temperature or room temperature, the contraction of the light guide plate will occur in the positioning slope area 115 instead of in the light incident area 114, so that the light source 130 and the light guide plate 110 can maintain close contact, Zero gap, thereby reducing light leakage, maintaining high luminance and light utilization.
从另一角度来看，如当固定件170的粘着顶面171为一水平表面或斜率小于零的斜面时，当定位斜面区115渐渐往外侧延伸膨胀时，其粘着顶面171依旧会与固定件170有所接触而无法分离。一旦，在高热膨胀时，定位斜面区115仍与固定件170有接触而被固定住时，而在温度恢复至理想温度或室温时，导光板110仅能从入光区114来收缩长度，如此一来，导光板110与光源130之间就会形成间隙，影响显示器的辉度表现。From another point of view, when the adhesive top surface 171 of the fixing member 170 is a horizontal surface or a slope with a slope less than zero, when the positioning slope area 115 gradually expands to the outside, the adhesive top surface 171 will still be in contact with the fixed surface. The pieces 170 are in contact and cannot be separated. Once, during high thermal expansion, the positioning slope area 115 is still in contact with the fixing member 170 and is fixed, and when the temperature returns to the ideal temperature or room temperature, the light guide plate 110 can only shrink from the light incident area 114 in length, so As a result, a gap will be formed between the light guide plate 110 and the light source 130, which affects the luminance performance of the display.
于本实施例中，导光板110为楔形结构，如第4(a)与4(b)图所示，亦即入光区114与定位斜面区115的厚度不同。具体而言，导光板110的长度为L，定位斜面区115的长度为A时，需满足A小于或等于L/4，且A大于或等于0.5mm。说明书所提及的长度为以入光面为基准，往相对于入光面的另一端面的延伸的水平方向X的垂直距离。长度L为在此水平方向X上，导光板的长度；长度A亦在此水平方向X上，定位斜面区115的长度，换言之，长度A为定位斜面区115垂值投影于出光面112的投影长度，如第4(a)所示。当定位斜面区115的长度A小于0.5mm时，固定力不足且制程较为困难。当定位斜面区115的长度A大于L/4时，设有斜面的区域过大而会产生较大区域的亮线或暗线，影响光学均匀度。同时，当长度A越大时，定位斜面区115的斜率会越来越趋近于零(水平)，则热胀时，定位斜面区115依旧会与固定件170接触，而影响后续冷缩的活动力，使得光源130与导光板110之间会产生间隙。因此，当长度A小于或等于L/4，且长度A大于或等于0.5mm时，可兼顾导光板110的固定力、光学均匀度以及维持高辉度。In this embodiment, the light guide plate 110 is a wedge-shaped structure, as shown in FIGS. 4( a ) and 4 ( b ), that is, the light incident area 114 and the positioning slope area 115 have different thicknesses. Specifically, when the length of the light guide plate 110 is L and the length of the positioning slope area 115 is A, it must be satisfied that A is less than or equal to L/4, and A is greater than or equal to 0.5 mm. The length mentioned in the specification refers to the vertical distance from the light incident surface to the horizontal direction X extending from the other end surface of the light incident surface. The length L is the length of the light guide plate in this horizontal direction X; the length A is also the length of the positioning slope area 115 in this horizontal direction X, in other words, the length A is the projection of the vertical value of the positioning slope area 115 on the light-emitting surface 112 length, as shown in Section 4(a). When the length A of the positioning slope area 115 is less than 0.5 mm, the fixing force is insufficient and the manufacturing process is difficult. When the length A of the positioning bevel area 115 is greater than L/4, the area provided with the bevel is too large to produce bright lines or dark lines in a large area, which affects the optical uniformity. At the same time, when the length A is larger, the slope of the positioning slope area 115 will be closer to zero (horizontal), and when thermal expansion occurs, the positioning slope area 115 will still be in contact with the fixing member 170, which will affect the subsequent cold shrinkage. The moving force creates a gap between the light source 130 and the light guide plate 110 . Therefore, when the length A is less than or equal to L/4, and the length A is greater than or equal to 0.5 mm, the fixing force of the light guide plate 110 , optical uniformity and maintaining high brightness can be taken into account.
请参阅图4(b)，图4(b)为本发明的一实施例的导光板示意图。于本实施例中，导光板110为楔形结构，亦即入光区114与定位斜面区115的厚度不同。具体而言，说明书提及的厚度为以出光面为基准，往框体150的底部152(请参阅图2)沿伸的垂直方向Z的垂直距离。厚度H为在垂直此方向Z上，入光区114的厚度；厚度B亦在此垂直方向Z上，定位斜面区115的最大厚度。于本实施例中，厚度H小于厚度B，且厚度B与厚度H之间的差值需大于或等于0.05mm。当厚度B与厚度H之间的差值小于0.05mm时，会影响导光板110的固定力、光学辉度与均匀度。Please refer to FIG. 4( b ). FIG. 4( b ) is a schematic diagram of a light guide plate according to an embodiment of the present invention. In this embodiment, the light guide plate 110 has a wedge-shaped structure, that is, the light incident area 114 and the positioning slope area 115 have different thicknesses. Specifically, the thickness mentioned in the specification refers to the vertical distance from the light emitting surface to the bottom 152 of the frame body 150 (see FIG. 2 ) along the vertical direction Z extending. The thickness H is the thickness of the light incident area 114 in the vertical direction Z; the thickness B is also in the vertical direction Z, which defines the maximum thickness of the slope area 115 . In this embodiment, the thickness H is smaller than the thickness B, and the difference between the thickness B and the thickness H must be greater than or equal to 0.05 mm. When the difference between the thickness B and the thickness H is less than 0.05 mm, the fixing force, optical brightness and uniformity of the light guide plate 110 will be affected.
于本实施例中，固定件170为具有直角梯形截面的粘胶材料，如图5(a)所示，而粘着顶面171为直角梯形截面的斜面，可助于导光板110在热胀冷缩时，依旧能与光源130之间为零间隙。固定件170的长度a需满足：长度a小于或等于L/4，且长度a大于或等于0.5mm；而固定件170的最大厚度h与最小厚度b之间的差值亦需大于或等于0.05mm。当固定件170的长度与厚度满足上述条件时，可提高粘着的固定力与提升制程的可行性。In this embodiment, the fixing member 170 is an adhesive material with a right-angled trapezoidal section, as shown in FIG. When the time is shortened, there can still be zero gap with the light source 130. The length a of the fixing part 170 needs to meet: the length a is less than or equal to L/4, and the length a is greater than or equal to 0.5 mm; and the difference between the maximum thickness h and the minimum thickness b of the fixing part 170 must also be greater than or equal to 0.05 mm. When the length and thickness of the fixing member 170 meet the above conditions, the fixing force of the adhesive can be improved and the feasibility of the manufacturing process can be improved.
于另一实施例中，固定件170可具有基材172与胶层171，而基材172为具有直角梯形截面的基板材料，如图5(b)所示。于本实施例中，胶层173为均一厚度，且胶层173设置于基材172的直角梯形截面的斜面上。当胶层173为均一厚度时，胶层173的形状稳定度较高，亦即重复使用多次后，胶层173不易变形，使得固定件170较能维持粘着顶面171的斜度。此外，基材172的底面亦可设有另一胶层174，使得固定件17具有双面粘胶层的特性。In another embodiment, the fixing member 170 may have a base material 172 and an adhesive layer 171 , and the base material 172 is a substrate material with a right-angled trapezoidal cross-section, as shown in FIG. 5( b ). In this embodiment, the adhesive layer 173 has a uniform thickness, and the adhesive layer 173 is disposed on the slope of the right-angled trapezoidal section of the substrate 172 . When the thickness of the adhesive layer 173 is uniform, the shape stability of the adhesive layer 173 is high, that is, the adhesive layer 173 is not easily deformed after repeated use, so that the fixing member 170 can better maintain the slope of the top surface 171 . In addition, another adhesive layer 174 may also be provided on the bottom surface of the substrate 172 , so that the fixing member 17 has the characteristics of a double-sided adhesive layer.
于本实施例中，固定件170为单一条状的结构，如图6(a)所示，图6(a)为本发明的一实施例的背光模块的俯视图。从图6(a)可观察到，光源130设置于导光板110的周边，邻近于入光区114，而固定件170则位于导光板110的底面，且固定件170位置是对应于定位斜面区115。于另一实施例中，固定件170为多条的结构，如图6(b)所示，为两条的固定件170，但本发明不以此为限。于本实施例中，固定件170分别设置于定位斜面区115的两角落，能够减少导光板斜面所造成的亮线或暗线现象，让光线的均匀度提升。于变形例中，导光板110的底面可透过设置不同密度的布点于入光区114与定位斜面区115，进而避免导光板底面的斜面所造成的亮线或暗线现象。In this embodiment, the fixing member 170 is a single strip structure, as shown in FIG. 6( a ), which is a top view of a backlight module according to an embodiment of the present invention. It can be observed from FIG. 6( a ) that the light source 130 is disposed on the periphery of the light guide plate 110, adjacent to the light incident area 114, and the fixing member 170 is located on the bottom surface of the light guide plate 110, and the position of the fixing member 170 is corresponding to the positioning slope area. 115. In another embodiment, the fixing member 170 has a multi-piece structure, as shown in FIG. 6( b ), two fixing members 170 are used, but the present invention is not limited thereto. In this embodiment, the fixing parts 170 are respectively disposed at two corners of the positioning slope area 115, which can reduce bright lines or dark lines caused by the slope of the light guide plate, and improve the uniformity of light. In a modified example, the bottom surface of the light guide plate 110 can be arranged with different densities in the light incident area 114 and the positioning slope area 115 to avoid bright or dark lines caused by the slope of the bottom surface of the light guide plate.
于图2所示的实施例中，定位面113为导光板110的底面，但本发明不以此为限。于第7(a)与7(b)图所示的实施例中，定位面113为导光板110的侧面。请参阅图7(a)，图7(a)为本发明的另一实施例的背光模块的俯视图。于本实施例中的背光模块200中，定位面213为导光板210的侧面，详言之，定位面213分别连接出光面212与入光面211。框体250具有相连的侧部253与底部252(为让图7(a)与图7(b)清楚明了，仅绘示框体250的侧部253)，而固定件270则位于导光板210侧面与框体250的侧部253之间。具体而言，导光板210的侧面(定位面213)具有入光区214与定位斜面区215，而固定件270则位于定位斜面区215与框体250的侧部253之间，用来将导光板210固定于框体250。于本实施例中，定位斜面区215与固定件270皆具有相同斜率的斜面，两者可为互补结构。如此一来，当导光板210于高热膨胀时，定位斜面区215与固定件270之间可产生间隙而不接触，便于在恢复于室温或理想温度时，定位斜面区215可有收缩的空间与活动力，以减少入光区214发生收缩的机率。如此一来，在热胀冷缩的影响下，导光板210与光源230之间依旧能保持紧密接触、零间隙，以形成高辉度、高光线利用率的背光模块200。In the embodiment shown in FIG. 2 , the positioning surface 113 is the bottom surface of the light guide plate 110 , but the present invention is not limited thereto. In the embodiment shown in FIGS. 7( a ) and 7 ( b ), the positioning surface 113 is a side surface of the light guide plate 110 . Please refer to FIG. 7( a ), which is a top view of a backlight module according to another embodiment of the present invention. In the backlight module 200 in this embodiment, the positioning surface 213 is a side surface of the light guide plate 210 , in detail, the positioning surface 213 is respectively connected to the light emitting surface 212 and the light incident surface 211 . The frame body 250 has a connected side portion 253 and a bottom portion 252 (only the side portion 253 of the frame body 250 is shown for clarity in FIG. 7( a ) and FIG. Between the side and the side 253 of the frame body 250 . Specifically, the side surface (positioning surface 213) of the light guide plate 210 has a light incident area 214 and a positioning slope area 215, and the fixing member 270 is located between the positioning slope area 215 and the side portion 253 of the frame body 250, and is used to guide the The light board 210 is fixed to the frame body 250 . In this embodiment, both the positioning slope area 215 and the fixing member 270 have slopes with the same slope, and the two can be complementary structures. In this way, when the light guide plate 210 is under high thermal expansion, a gap can be formed between the positioning slope area 215 and the fixing member 270 without contact, so that when the light guide plate 210 is restored to room temperature or ideal temperature, the positioning slope area 215 can have a shrinkage space and activity, so as to reduce the probability of contraction of the light incident region 214 . In this way, under the influence of thermal expansion and contraction, the light guide plate 210 and the light source 230 can still maintain close contact and zero gap, so as to form a backlight module 200 with high brightness and high light utilization efficiency.
请参阅图7(b)的另一实施例，其与图7(a)的实施例差异在于固定件的设置。具体而言，于图7(a)的实施例中，固定件270为具有一直角梯形截面的结构，而图7(b)的实施例中，固定件370为具有均一厚度的胶层，搭配框体350的侧部353的凸出元件354。于本实施例中，凸出元件354从框体350的侧部354而突出，且往导光板310方向延伸。凸出元件354与框体350为相同材料，且可透过一体成形的方式来制作，但本发明不以此为限，凸出元件354亦可与框体350为不同的材料或额外固定于框体350的元件。于本实施例中，凸出元件354具有斜面，举例而言，为直角梯形截面或直角三角型截面。固定件370则设置于凸出元件354的斜面，而使得粘着顶面371与定位斜面区315具有相同斜率的斜面，且形成互补结构。除了能够形成高辉度、高光线利用率的背光模块300外，均一厚度的固定件370的形状稳定度较高，亦即重复使用多次后，固定件370不易发生变形。Please refer to another embodiment of FIG. 7( b ), which differs from the embodiment of FIG. 7( a ) in the setting of the fixing member. Specifically, in the embodiment of FIG. 7(a), the fixing member 270 is a structure with a right-angled trapezoidal section, while in the embodiment of FIG. 7(b), the fixing member 370 is an adhesive layer with a uniform thickness. The protruding element 354 of the side portion 353 of the frame body 350 . In this embodiment, the protruding element 354 protrudes from the side portion 354 of the frame body 350 and extends toward the light guide plate 310 . The protruding element 354 and the frame body 350 are made of the same material, and can be made by integral molding. Components of frame body 350 . In this embodiment, the protruding element 354 has a slope, for example, a right-angled trapezoidal section or a right-angled triangular section. The fixing member 370 is disposed on the slope of the protruding element 354 , so that the adhesive top surface 371 and the positioning slope area 315 have the same slope and form a complementary structure. In addition to being able to form a backlight module 300 with high luminance and high light utilization efficiency, the fixing member 370 with a uniform thickness has high shape stability, that is, the fixing member 370 is not easily deformed after repeated use.
图8(a)为另一实施例的背光模块的导光板示意图，请参阅图8(a)。本实施例与上述实施例的结构与功效大致相同，主要差异在于：本实施例的定位斜面区415应用于入光端为楔形结构的导光板。具体而言，如图8(a)所示，导光板410具有入光面411、出光面412与定位面413，而光源(未绘示)设置于入光面411，形成侧入式光源。出光面412与定位面413分别连接于入光面411，且出光面412为导光板410的顶面，定位面413为导光板410的底面，使得出光面412与定位面413为导光板410的相对的两面。于本实施例中，导光板的定位面413具有入光区414与定位斜面区415，且入光区414邻近光源(未绘示)，使得入光区314位于光源与定位斜面区315之间。请参阅图8(a)，导光板310于入光区414更设有入光斜面416，使得导光板410的定位面413形成两斜面结构，其一位于末端的定位斜面区415，另一则位于前端的入光斜面416，其中定位斜面区415的斜率大于零，而入光斜面416的斜率小于零。定位斜面区415可助于背光模块不受热胀冷缩的影响，而能保持光源与导光板之间的零间隙；而入光斜面416则可应用于小尺寸、体积轻薄或携带式显示装置，且能保有高亮度的功效。FIG. 8( a ) is a schematic diagram of a light guide plate of a backlight module according to another embodiment, please refer to FIG. 8( a ). The structure and function of this embodiment are substantially the same as those of the above-mentioned embodiments, and the main difference lies in that the positioning slope area 415 of this embodiment is applied to a light guide plate with a wedge-shaped light incident end. Specifically, as shown in FIG. 8( a ), the light guide plate 410 has a light incident surface 411 , a light exit surface 412 and a positioning surface 413 , and a light source (not shown) is disposed on the light incident surface 411 to form a side-type light source. The light-emitting surface 412 and the positioning surface 413 are respectively connected to the light-incident surface 411, and the light-emitting surface 412 is the top surface of the light guide plate 410, and the positioning surface 413 is the bottom surface of the light guide plate 410, so that the light-emitting surface 412 and the positioning surface 413 are the bottom surface of the light guide plate 410. opposite sides. In this embodiment, the positioning surface 413 of the light guide plate has a light incident area 414 and a positioning slope area 415, and the light incident area 414 is adjacent to the light source (not shown), so that the light incident area 314 is located between the light source and the positioning slope area 315 . Please refer to Fig. 8 (a), the light guide plate 310 is further provided with a light incident slope 416 in the light incident area 414, so that the positioning surface 413 of the light guide plate 410 forms two slope structures, one of which is located at the positioning slope area 415 at the end, and the other The slope of the light incident slope 416 located at the front end, wherein the slope of the positioning slope area 415 is greater than zero, and the slope of the light incident slope 416 is smaller than zero. The positioning slope area 415 can help the backlight module not be affected by thermal expansion and contraction, and can maintain a zero gap between the light source and the light guide plate; while the light incident slope 416 can be applied to small-sized, light-weight or portable display devices. And can maintain the effect of high brightness.
于另一实施例中，请参阅图8(b)，图8(b)为另一实施例的背光模块的导光板示意图，其与图8(a)的实施例的差异在于：入光斜面设置的表面不同。于本实施例中，入光斜面516设置于出光面512，亦即入光斜面516是位于导光板510的顶面。同样地，导光板510于入光区514设有入光斜面516，使得导光板510的定位面513形成两斜面结构，其一位于末端的定位斜面区515，另一则位于前端的入光斜面516。值得注意的是，入光斜面516与定位斜面区515设置于导光板510的相对的表面，换言之，入光斜面516设置于导光板510的顶面，而定位斜面区515设置于导光板510的底面，且入光斜面516与定位斜面区515的斜率皆大于零。于本实施例中，定位斜面区515可助于背光模块不受热胀冷缩的影响，而能保持光源与导光板之间的零间隙；而入光斜面516则可应用于小尺寸、体积轻薄或携带式显示装置，且能保有高亮度的功效。In another embodiment, please refer to FIG. 8(b). FIG. 8(b) is a schematic diagram of a light guide plate of a backlight module in another embodiment. The difference between it and the embodiment in FIG. The surface of the setting is different. In this embodiment, the light incident slope 516 is disposed on the light exit surface 512 , that is, the light incident slope 516 is located on the top surface of the light guide plate 510 . Similarly, the light guide plate 510 is provided with a light incident slope 516 in the light incident area 514, so that the positioning surface 513 of the light guide plate 510 forms two slope structures, one of which is located at the positioning slope area 515 at the end, and the other is located at the light incident slope at the front end. 516. It is worth noting that the light incident slope 516 and the positioning slope area 515 are disposed on opposite surfaces of the light guide plate 510, in other words, the light incident slope 516 is disposed on the top surface of the light guide plate 510, and the positioning slope area 515 is disposed on the top surface of the light guide plate 510. The bottom surface, and the slopes of the light incident slope 516 and the positioning slope region 515 are both greater than zero. In this embodiment, the positioning slope area 515 can help the backlight module not be affected by thermal expansion and contraction, and can maintain a zero gap between the light source and the light guide plate; while the light incident slope 516 can be applied to small size, light and thin volume Or a portable display device, and can maintain the effect of high brightness.
根据上述实施例的背光模块，藉由导光板的定位斜面区与固定件的粘着顶面具有相同斜率的斜面，助于热胀后的收缩恢复活动力能存在，使得光源与导光板之间能够维持零间隙，以形成高辉度、高光线利用率的背光模块。当固定件具有均一厚度的胶材时，固定件的行状稳定度较高，不易发生变形。According to the backlight module of the above-mentioned embodiment, the positioning slope area of the light guide plate has the same slope as the adhesive top surface of the fixing member, so that the shrinkage recovery force after thermal expansion can exist, so that the light source and the light guide plate can be separated. Maintain a zero gap to form a backlight module with high brightness and high light utilization efficiency. When the fixing part has an adhesive material of uniform thickness, the stability of the row shape of the fixing part is relatively high, and deformation is not easy to occur.
当然，本发明还可有其它多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104126762 | 2015-08-17 | ||
| TW104126762ATWI559055B (en) | 2015-08-17 | 2015-08-17 | Backlight module |
| Publication Number | Publication Date |
|---|---|
| CN105258025Atrue CN105258025A (en) | 2016-01-20 |
| CN105258025B CN105258025B (en) | 2017-12-22 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510717205.6AExpired - Fee RelatedCN105258025B (en) | 2015-08-17 | 2015-10-29 | Backlight module |
| Country | Link |
|---|---|
| CN (1) | CN105258025B (en) |
| TW (1) | TWI559055B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113534531A (en)* | 2020-04-22 | 2021-10-22 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
| TWI727759B (en)* | 2020-04-22 | 2021-05-11 | 瑞儀光電股份有限公司 | Backlight module and display device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060171172A1 (en)* | 2003-12-03 | 2006-08-03 | Quanta Display Inc. | Frame structure used in a backlight module |
| CN101038401A (en)* | 2007-05-11 | 2007-09-19 | 友达光电股份有限公司 | Backlight module |
| CN101285963A (en)* | 2008-06-06 | 2008-10-15 | 友达光电股份有限公司 | Backlight module |
| US20130163279A1 (en)* | 2011-12-21 | 2013-06-27 | Au Optronics Corporation | Backlight module |
| CN103645583A (en)* | 2013-08-13 | 2014-03-19 | 友达光电股份有限公司 | Backlight module |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200409975A (en)* | 2002-12-13 | 2004-06-16 | Hon Hai Prec Ind Co Ltd | A light guide plate and its manufacturing method |
| TWI265352B (en)* | 2005-04-21 | 2006-11-01 | Coretronic Corp | Backlight module |
| TWI472850B (en)* | 2012-05-08 | 2015-02-11 | Au Optronics Corp | Backlight module |
| TWI561897B (en)* | 2013-07-17 | 2016-12-11 | Radiant Opto Electronics Corp | Backlight module and liquid crystal display |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060171172A1 (en)* | 2003-12-03 | 2006-08-03 | Quanta Display Inc. | Frame structure used in a backlight module |
| CN101038401A (en)* | 2007-05-11 | 2007-09-19 | 友达光电股份有限公司 | Backlight module |
| CN101285963A (en)* | 2008-06-06 | 2008-10-15 | 友达光电股份有限公司 | Backlight module |
| US20130163279A1 (en)* | 2011-12-21 | 2013-06-27 | Au Optronics Corporation | Backlight module |
| CN103645583A (en)* | 2013-08-13 | 2014-03-19 | 友达光电股份有限公司 | Backlight module |
| Publication number | Publication date |
|---|---|
| TW201708906A (en) | 2017-03-01 |
| TWI559055B (en) | 2016-11-21 |
| CN105258025B (en) | 2017-12-22 |
| Publication | Publication Date | Title |
|---|---|---|
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|---|---|---|---|
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