CN104777549A - Light guide strip for liquid crystal display - Google Patents
Light guide strip for liquid crystal display Download PDFInfo
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- CN104777549A CN104777549A CN201510196056.3A CN201510196056A CN104777549A CN 104777549 A CN104777549 A CN 104777549A CN 201510196056 A CN201510196056 A CN 201510196056A CN 104777549 A CN104777549 A CN 104777549A
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- 239000004973 liquid crystal related substance Substances 0.000 title abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000009286 beneficial effect Effects 0.000 claims abstract description 3
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000010408 film Substances 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
本发明涉及导光条技术领域，特别是一种液晶显示器用导光条，其特征在于：包括导光条，所述导光条由一入射面、出射面和发射面互相夹角成形；所述反射面为自由曲面；所述导光条的本体出射面长度和本体入射面的长度一样，但是本体出射面的宽度比本体入射面的宽度小；所述的入射面和出射面设置有利于LED光线收敛的微结构。本发明采用以上结构，改变LED入射至导光板的光线路径，LED发出的光线先通过导光条，再从导光条出射到导光板的入射面。从导光条中出射的光线相比于直接从LED出射的光线收敛性好，实现导光板的厚度小于LED，实现液晶显示器的超薄化设计，节省材料，降低成本，同时光线在导光板中的损耗减少；微结构提高光线的收敛性，同时可以提高光线的均齐性。
The present invention relates to the technical field of light guide strips, in particular to a light guide strip for liquid crystal displays, which is characterized in that: it includes a light guide strip, and the light guide strip is formed by an angle between an incident surface, an exit surface and an emission surface; The reflective surface is a free-form surface; the length of the exit surface of the body of the light guide strip is the same as the length of the incident surface of the body, but the width of the exit surface of the body is smaller than the width of the incident surface of the body; the setting of the incident surface and the exit surface is beneficial The microstructure of LED light convergence. The present invention adopts the above structure to change the light path of the LED incident on the light guide plate, the light emitted by the LED first passes through the light guide strip, and then exits from the light guide strip to the incident surface of the light guide plate. The light emitted from the light guide strip has better convergence than the light directly emitted from the LED. The thickness of the light guide plate is smaller than that of the LED, and the ultra-thin design of the liquid crystal display is realized, which saves materials and reduces costs. At the same time, the light is in the light guide plate. The loss of the light is reduced; the microstructure improves the convergence of the light, and at the same time can improve the uniformity of the light.
Description
技术领域 technical field
本发明涉及导光条技术领域，尤其是涉及一种LED 背光源的导光条。 The invention relates to the technical field of light guide strips, in particular to a light guide strip for LED backlight sources.
背景技术 Background technique
近年来，液晶显示装置因为体积轻薄，占用空间小，辐射小等优点，而逐渐占据了显示产品的主流，并渐渐代替了传统的阴极射线管显示装置。液晶并不是主动发光型显示器，需要背光源为其提供光能。用LED作为背光源的液晶显示器相对于用CCFL作为背光源的液晶显示器具有更高效、更轻薄以及更环保的优点。LED背光模组是为液晶显示器提供均匀光源的部件，按照LED的排布位置可以把背光源分为侧入式、直下式两种。 In recent years, liquid crystal display devices have gradually occupied the mainstream of display products due to their advantages of light and thin volume, small space occupation, and low radiation, and have gradually replaced traditional cathode ray tube display devices. Liquid crystal is not an active light-emitting display, and needs a backlight source to provide light energy for it. Compared with the liquid crystal display using CCFL as the backlight, the liquid crystal display using LED as the backlight has the advantages of being more efficient, thinner and more environmentally friendly. The LED backlight module is a component that provides a uniform light source for the liquid crystal display. According to the arrangement of the LEDs, the backlight can be divided into two types: side-type and direct-type.
将LED排列在背光模组的最底层，使LED发出的光直接经过各光学部件射在液晶面板上，这种结构称为直下式背光模组。直下式结构可以不必使用导光板，从而省去了网点设计这一环节，但也使LED与液晶面板之间出现中空地带，光学膜片缺少支撑，所以需要使用扩散板来支撑上层的膜片。另外，由于扩散板本身有很高的雾度，可以改善由混光距离不足造成的亮暗不均现象，达到更好的主观效果。但是，直下式背光源需要牺牲厚度实现将LED光线进行混光，因此，其厚度会比侧入式的厚。 Arrange the LEDs at the bottom of the backlight module, so that the light emitted by the LEDs directly passes through the optical components and hits the liquid crystal panel. This structure is called a direct-lit backlight module. The direct-down structure does not need to use a light guide plate, thereby eliminating the need for dot design, but it also creates a hollow area between the LED and the LCD panel, and the optical film lacks support, so a diffuser plate is needed to support the upper film. In addition, due to the high haze of the diffuser itself, it can improve the uneven brightness and darkness caused by insufficient light mixing distance, and achieve better subjective effects. However, the direct-lit backlight needs to sacrifice thickness to mix LED light, so its thickness will be thicker than that of the side-lit backlight.
侧入式背光源是将LED设置在导光板的一侧，如附图1所示，其光学部件主要由反射片、导光板、扩散片等构成。侧入式背光源是将点光源LED组成线光源，一般采用串联的方式把LED贴在PCB上做成LED灯条，然后用导热贴或者螺丝将灯条固定在散热器上。LED发出的光线达到导光板的入光面，经过导光板对其反射和折射后，在经过扩散膜和增亮膜到达液晶面板。通过这种设计方式，背光模组可以做的很薄，能够实现液晶电视的超薄化设计。 The side-type backlight is to install LEDs on one side of the light guide plate. As shown in Figure 1, its optical components are mainly composed of reflective sheets, light guide plates, and diffusion sheets. The side-type backlight is a line light source composed of point light LEDs. Generally, the LEDs are attached to the PCB in series to form an LED light bar, and then the light bar is fixed on the heat sink with heat-conducting stickers or screws. The light emitted by the LED reaches the light incident surface of the light guide plate, after being reflected and refracted by the light guide plate, it passes through the diffusion film and the brightness enhancement film to reach the liquid crystal panel. Through this design method, the backlight module can be made very thin, which can realize the ultra-thin design of the LCD TV.
作为以LED为背光源的侧入式液晶显示器，随着LED工艺及技术的发展，LED的体积越来越小，发光效率越来越高，其背光模组中的导光板也越来越薄。但是，侧入式液晶显示器中的导光板为了尽可能收集LED发出的光线，提高LED光线的利用率，导光板的厚度一定要比LED发光面大，导致背光模组的厚度不能完全的做到超薄化设计。本发明提出一种液晶显示器用导光条，通过改变LED光线路径，可以解决导光板的厚度要比LED发光面大的问题，减小背光模组的整体厚度，实现背光模组的超薄化设计。 As a side-lit liquid crystal display with LED as the backlight source, with the development of LED technology and technology, the volume of LED is getting smaller and the luminous efficiency is getting higher and higher, and the light guide plate in the backlight module is getting thinner and thinner. . However, in order to collect the light emitted by the LED as much as possible and improve the utilization rate of the LED light, the light guide plate in the side-type liquid crystal display must be thicker than the light-emitting surface of the LED, so the thickness of the backlight module cannot be fully achieved. Ultra-thin design. The present invention proposes a light guide strip for liquid crystal displays. By changing the LED light path, the problem that the thickness of the light guide plate is larger than that of the LED light-emitting surface can be solved, the overall thickness of the backlight module can be reduced, and the ultra-thinness of the backlight module can be realized. design.
发明内容 Contents of the invention
本发明的目的是提供一种液晶显示器用导光条，具有较好的光线收敛性，可以解决导光板的厚度要比LED发光面大的问题，减小导光板的厚度。本发明采用以下方案实现：一种液晶显示器用导光条，其特征在于：包括导光条，所述导光条由一入射面、出射面和发射面互相夹角成形；所述的入射面和出射面设置有利于LED光线收敛的微结构。 The purpose of the present invention is to provide a light guide strip for liquid crystal display, which has good light convergence, can solve the problem that the thickness of the light guide plate is larger than that of the LED light-emitting surface, and reduce the thickness of the light guide plate. The present invention adopts the following solutions to realize: a light guide strip for liquid crystal display, characterized in that: it includes a light guide strip, and the light guide strip is formed by an angle between an incident surface, an exit surface and an emission surface; the incident surface And the exit surface is provided with a microstructure that is conducive to the convergence of LED light.
在本发明一实施例中，所述的入射面和出射面互成90度夹角。 In an embodiment of the present invention, the incident surface and the outgoing surface form an angle of 90 degrees to each other.
在本发明一实施例中，所述出射面长度和入射面长度一样。 In an embodiment of the present invention, the length of the outgoing surface is the same as the length of the incident surface.
在本发明一实施例中，所述出射面宽度比入射面宽度小。 In an embodiment of the present invention, the width of the outgoing surface is smaller than that of the incident surface.
在本发明一实施例中，所述微结构是微沟槽或微光栅。 In an embodiment of the present invention, the microstructure is a micro-groove or a micro-grating.
在本发明一实施例中，所述微结构是等密度或者不等密度的分布在所述出射面和入射面。 In an embodiment of the present invention, the microstructures are distributed on the outgoing surface and the incident surface with equal density or unequal density.
在本发明一实施例中，所述的反射面为自由曲面。 In an embodiment of the present invention, the reflective surface is a free-form surface.
在本发明一实施例中，所述的导光条两侧壁贴设有发射膜。 In an embodiment of the present invention, the two side walls of the light guide strip are attached with emission films.
在本发明一实施例中，所述的导光条为透明树脂材料制成。 In an embodiment of the present invention, the light guide strip is made of transparent resin material.
在本发明一实施例中，所述的入射面对光线进行第一次光线收敛。 In an embodiment of the present invention, the incident surface performs light convergence for the first time.
在本发明一实施例中，所述的反射面对光线进行第二次光线收敛。 In an embodiment of the present invention, the reflective surface performs light convergence for the second time.
在本发明一实施例中，所述的出射面对光线进行第三次光线收敛。 In an embodiment of the present invention, the outgoing surface performs light convergence for the third time.
与现有技术相比，本发明的有益效果： Compared with prior art, beneficial effect of the present invention:
本发明采用以上结构，改变LED入射至导光板的光线路径，LED发出的光线先通过导光条，再从导光条出射到导光板的入射面。该导光条的本体出射面长度和本体入射面的长度一样，但是本体出射面的宽度比本体入射面的宽度小，所以，从导光条中出射的光线相比于直接从LED出射的光线收敛性好，导光板的厚度可以做到更小，实现背光模组的超薄化设计，光线在导光板中的损耗减少，同时节省材料，降低成本；微结构不仅可以提高光线的收敛性，同时可以提高光线的均齐性。 The present invention adopts the above structure to change the light path of the LED incident on the light guide plate, the light emitted by the LED first passes through the light guide strip, and then exits from the light guide strip to the incident surface of the light guide plate. The length of the body exit surface of the light guide strip is the same as the length of the body incident surface, but the width of the body exit surface is smaller than the width of the body incident surface, so the light emitted from the light guide strip is compared with the light emitted directly from the LED. Good convergence, the thickness of the light guide plate can be made smaller, realize the ultra-thin design of the backlight module, reduce the loss of light in the light guide plate, save materials and reduce costs; the microstructure can not only improve the convergence of light, At the same time, the uniformity of light can be improved.
附图说明 Description of drawings
图1为现有技术的侧入式背光源的结构示意图。 FIG. 1 is a schematic structural diagram of an edge-lit backlight in the prior art.
图2是本发明的导光条实施例的立体示意图。 FIG. 2 is a schematic perspective view of an embodiment of a light guide strip of the present invention.
图3 是本发明的导光条的截面形状示意图。 Fig. 3 is a schematic diagram of the cross-sectional shape of the light guide strip of the present invention.
图4 是本发明的导光条安装于背光源装置中的结构示意图。 FIG. 4 is a schematic structural view of the light guide strip of the present invention installed in a backlight device.
图中，1-导光条；11-导光条本体；111-本体入射面（入射面）；112-本体反射面（反射面）；113-本体出射面（出射面）；12-微结构；2-LED光源；3-反射膜；4-导光板；5-散热器；6-PCB；7-液晶面板；8-膜片；9-反射片；10-网点。 In the figure, 1-light guide strip; 11-light guide strip body; 111-body incident surface (incident surface); 112-body reflection surface (reflection surface); 113-body exit surface (exit surface); 12-microstructure ;2-LED light source; 3-reflective film; 4-light guide plate; 5-radiator; 6-PCB; 7-LCD panel; 8-diaphragm; 9-reflector;
具体实施方式 Detailed ways
为使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。 In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
在以下描述中阐述了具体细节以便于充分理解本发明。但是本发明能够以多种不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似推广。因此本发明不受下面公开的具体实施方式的限制。 In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.
本实施例提供一种液晶显示器用导光条，其特征在于：包括导光条，所述导光条由一入射面、出射面和发射面互相夹角a、b、c成形；所述的入射面和出射面设置有利于LED光线收敛的微结构。 This embodiment provides a light guide strip for a liquid crystal display, which is characterized in that: it includes a light guide strip, and the light guide strip is formed by an angle a, b, and c between an incident surface, an outgoing surface, and an emitting surface; the described The incident surface and the outgoing surface are provided with microstructures that are conducive to the convergence of LED light.
具体的，请参见图2至4所示：一种LED背光源的导光条1，包括长条形状的导光条本体11，导光条本体11的本体入射面111为入光面，导光条本体11的本体出射面113为出光面。本实施例中，本体入射面111的长度和本体出射面113的长度一样，本体入射面111的宽度比本体出射面113的宽度小。在导光条本体11的横向截面中，导光条本体11的横向截面的轮廓形状近似于三角形。其中本体入射面和本体出射面的夹角可以是90度。 Specifically, please refer to Figures 2 to 4: a light guide strip 1 for LED backlight, including a long light guide strip body 11, the incident surface 111 of the light guide strip body 11 is the light incident surface, and the light guide strip body 11 The body emitting surface 113 of the light bar body 11 is a light emitting surface. In this embodiment, the length of the body incident surface 111 is the same as that of the body exit surface 113 , and the width of the body incident surface 111 is smaller than the width of the body exit surface 113 . In the transverse section of the light guide body 11 , the outline shape of the transverse section of the light guide body 11 is approximately triangular. The included angle between the incident surface of the body and the exit surface of the body may be 90 degrees.
此外，本实施例中，导光条本体11的本体入射面111和本体出射面113上设有微结构12。微结构12为微沟槽或微光栅，具体的可以是V沟槽型结构，该微结构12成不等密度排列，也可以等密度排列。导光条本体11的两端面可以紧贴有反射膜3。导光条本体11的本体反射面112为反光面，本体反射面112为自由曲面，可以改变LED光源2发出的光线路径，收敛光线。 In addition, in this embodiment, microstructures 12 are provided on the body incident surface 111 and the body exit surface 113 of the light guide strip body 11. The micro-structure 12 is a micro-groove or a micro-grating, specifically a V-groove structure, and the micro-structure 12 is arranged in a unequal density, or in an equal density arrangement. Both ends of the light guide body 11 can be closely attached to the reflective film 3 . The body reflection surface 112 of the light guide strip body 11 is a reflection surface, and the body reflection surface 112 is a free-form surface, which can change the light path emitted by the LED light source 2 and converge the light.
本发明的导光条1结构简单，成本低，LED光源2安装于导光条1的导光条本体入射面111的下方，导光条1从导光条本体入射面111进光，从导光条本体出射面113出光，LED光源2的光线不直接入射到导光板4，而是经过导光条1折射和发射后经过导光条本体出射面113出射到导光板4的入光面。导光条1对LED光源2发出的光线分别经过本体入射面111、本体反射面112以及本体出射面113后到达导光板4，总共对光线进行了三次收敛。使用该导光条1的液晶显示器的背光模组中的导光板4的厚度可以小于LED光源2，同时导光条1出射的光线的均齐性好。 The light guide strip 1 of the present invention is simple in structure and low in cost. The LED light source 2 is installed below the light guide strip body incident surface 111 of the light guide strip 1, and the light guide strip 1 enters light from the light guide strip body incident surface 111, The light emitting surface 113 of the light bar body emits light, and the light from the LED light source 2 is not directly incident on the light guide plate 4 , but is refracted and emitted by the light guide bar 1 and then exits to the light incident surface of the light guide plate 4 through the light guide body emitting surface 113 . The light emitted from the light guide strip 1 to the LED light source 2 respectively passes through the body incident surface 111 , the body reflection surface 112 and the body exit surface 113 and then reaches the light guide plate 4 , and converges the light three times in total. The thickness of the light guide plate 4 in the backlight module of the liquid crystal display using the light guide strip 1 can be smaller than that of the LED light source 2, and at the same time, the uniformity of the light emitted by the light guide strip 1 is good.
本发明虽然已以较佳实施例公开如上，但其并不是用来限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，都可以利用上述揭示的方法和技术内容对本发明技术方案做出可能的变动和修改，因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化及修饰，均属于本发明技术方案的保护范围。以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所做的均等变化与修饰，皆应属本发明的涵盖范围。 Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range. The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510196056.3A CN104777549A (en) | 2015-04-23 | 2015-04-23 | Light guide strip for liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510196056.3A CN104777549A (en) | 2015-04-23 | 2015-04-23 | Light guide strip for liquid crystal display |
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| CN104777549A true CN104777549A (en) | 2015-07-15 |
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| CN201510196056.3A Pending CN104777549A (en) | 2015-04-23 | 2015-04-23 | Light guide strip for liquid crystal display |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111190249A (en) * | 2020-02-26 | 2020-05-22 | Oppo广东移动通信有限公司 | A backlight module and its electronic equipment |
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Application publication date: 20150715 |