CN2938145Y - Structural improvement of light guide plate and liquid crystal display device having the light guide plate - Google Patents

Abstract

The light guide plate of the utility model at least comprises a light incident surface, a bottom surface intersected with the light incident surface and a light emergent surface opposite to the bottom surface, and the light source is arranged at one side corresponding to the light incident surface; the light emitting surface and the bottom surface are respectively provided with a first group of cutting grooves and a second group of cutting grooves, the cross section of each cutting groove of the first group of cutting grooves and the cross section of each cutting groove of the second group of cutting grooves have a vertex angle, a first oblique angle and a second oblique angle, the value range of the vertex angle in each cutting groove of the first group of cutting grooves is 75-120 degrees, the value range of the first oblique angle in each cutting groove of the second group of cutting grooves is 35-55 degrees, so that the passing light rays are emitted at a certain light emitting angle in a total reflection mode, the loss of large-angle light can be avoided, the light utilization rate is improved, and the arrangement of a prism sheet and a.

Description

Translated fromChinese

导光板的结构改良及具有该导光板的液晶显示装置Structural improvement of light guide plate and liquid crystal display device having the light guide plate

技术领域technical field

本实用新型涉及一种导光板结构改良，旨在提供一种可避免大角度光的损失，提高光利用率，并可省去棱镜片及扩散片的设置，以达到薄型化设计的导光板结构改良。The utility model relates to an improved light guide plate structure, which aims to provide a light guide plate structure that can avoid the loss of light at large angles, improve the light utilization rate, and save the setting of prism sheets and diffusion sheets to achieve a thinner design. improved.

背景技术Background technique

一般液晶显示装置(Liquid Crystal Display，LCD)的背光模块(Back Light Unit，BLU)的基本结构组成如图1所示，由导光板(LGP)11、设于导光板11板缘位置的光源12、设于导光板11下方的反射膜片13，以及设于导光板11与液晶面板17之间的光学膜片等组件所构成。The basic structure of the backlight module (Back Light Unit, BLU) of a general liquid crystal display device (Liquid Crystal Display, LCD) is shown in Figure 1. , areflective film 13 disposed under thelight guide plate 11 , and an optical film disposed between thelight guide plate 11 and theliquid crystal panel 17 and other components.

其中，导光板11的主要功能是藉由光散乱原理将光源12入射的平行光转换成平面垂直光，但为了达到散射均光的效果，通常于导光板11与液晶面板17之间所设置的光学膜片，其主要依序由下扩散片14、二棱镜片15以及上扩散片16所组成，以散射均光的效果；各棱镜片15上板面设有棱镜结构151(棱镜结构呈连续锯齿沟槽状)，其接收由导光板11及下扩散片14的光线，并经由各棱镜片的棱镜结构151折射后，其光线的发光角度变大，进而使视角变大而令亮度降低。Among them, the main function of thelight guide plate 11 is to convert the parallel light incident by thelight source 12 into plane perpendicular light by the principle of light scattering. The optical film is mainly composed of alower diffusion sheet 14, asecond prism sheet 15 and anupper diffusion sheet 16 in order to achieve the effect of scattering and uniform light; eachprism sheet 15 upper surface is provided with a prism structure 151 (the prism structure is continuous Saw-tooth groove shape), which receives the light from thelight guide plate 11 and thelower diffusion sheet 14, and after being refracted by theprism structure 151 of each prism sheet, the light emitting angle of the light becomes larger, thereby increasing the viewing angle and reducing the brightness.

故亦有如图2所示的液晶显示装置结构，其由导光板(LGP)11、设于导光板11板缘位置的光源12、设于导光板11下方的反射膜片13，以及设于导光板11与液晶面板17之间的光学膜片等组件所构成；其中，该光学膜片主要依序由一逆棱镜片15’以及上扩散片16所组成，其逆棱镜片15’的底面亦设有复数棱镜结构151’，当光线由导光板11射出而进入逆棱镜片15’时，可缩小光线的出光角度，进而缩小视角而令亮度提高。Therefore, there is also a liquid crystal display device structure as shown in Figure 2, which consists of a light guide plate (LGP) 11, alight source 12 located at the edge of thelight guide plate 11, areflective film 13 located below thelight guide plate 11, and a The optical film between thelight plate 11 and theliquid crystal panel 17 is composed of components such as an optical film; wherein, the optical film is mainly composed of a reverse prism sheet 15' and anupper diffusion sheet 16 in sequence, and the bottom surface of the reverse prism sheet 15' is also A plurality ofprism structures 151 ′ are provided. When the light exits from thelight guide plate 11 and enters thereverse prism sheet 15 ′, the exit angle of the light can be reduced, thereby narrowing the viewing angle and increasing the brightness.

然而，上述两种液晶显示装置结构，均利用增加数光学膜片的使用，不仅增加了成本，且其各光学膜片的组装，亦会增加该液晶显示装置的厚度，违背了轻、薄、短、小的需求。However, the above-mentioned two liquid crystal display device structures all utilize the use of increasing the number of optical films, which not only increases the cost, but also increases the thickness of the liquid crystal display device in the assembly of each optical film, which violates the lightness, thinness, Short, small needs.

实用新型内容Utility model content

有鉴于此，本实用新型在于提供一种可避免大角度光的损失，提高光利用率，并可省去棱镜片及扩散片的设置，以达到薄型化设计的导光板结构改良，以及一种利用该导光板结构改良的液晶显示装置。In view of this, the utility model is to provide an improved light guide plate structure that can avoid the loss of light at large angles, improve the light utilization rate, and save the setting of the prism sheet and the diffusion sheet to achieve a thinner design. A liquid crystal display device improved by using the structure of the light guide plate.

本实用新型导光板的结构改良的解决手段，是该导光板至少包括有一入光面、一与该入光面相交的底面，以及一与该底面相对的出光面，而光源则设置于对应该入光面的一侧；其中，该出光面及底面分别设有第一、二组切槽，其第一、二组切槽各切槽的截面具有一顶角、一第一斜角及第二斜角，该第一组切槽各切槽中顶角的取值范围是75°～120°，该第二组切槽各切槽中第一斜角的取值范围是35°～55°，以使通过的光线由全反射方式以一定出光角度射出。The solution to the structural improvement of the light guide plate of the utility model is that the light guide plate at least includes a light incident surface, a bottom surface intersecting the light incident surface, and a light exit surface opposite to the bottom surface, and the light source is arranged on the corresponding One side of the light-incident surface; wherein, the light-emitting surface and the bottom surface are respectively provided with first and second sets of cut grooves, and the cross-sections of the first and second sets of cut grooves have a top angle, a first bevel angle and a second set of cut grooves. Two bevel angles, the value range of the apex angle in each groove of the first group of grooves is 75°～120°, the value range of the first bevel angle in each groove of the second group of grooves is 35°～55° °, so that the passing light is emitted at a certain light angle by total reflection.

以及一种液晶显示装置，其至少包含有：And a liquid crystal display device, which at least includes:

一导光板，该导光板至少包括有一入光面、一与该入光面相交的底面，以及一与该底面相对的出光面；A light guide plate, which at least includes a light incident surface, a bottom surface intersecting the light incident surface, and a light exit surface opposite to the bottom surface;

一光源，设置于导光板入光面的一侧；A light source, arranged on one side of the light incident surface of the light guide plate;

一反射片，设置于导光板下方；a reflective sheet arranged under the light guide plate;

一扩散片，设置于导光板上方；A diffusion sheet is arranged above the light guide plate;

一液晶面板，设置于扩散片上方；a liquid crystal panel, arranged above the diffuser;

该出光面及底面分别设有第一、二组切槽，其第一、二组切槽各切槽的截面具有一顶角、一第一斜角及第二斜角，该第一组切槽各切槽中顶角的取值范围是75°～120°，该第二组切槽各切槽中第一斜角的取值范围是35°～55°，以使通过的光线由全反射方式以一定出光角度射出。The light-emitting surface and the bottom surface are respectively provided with first and second groups of cut grooves. The cross-sections of the first and second groups of cut grooves each have a top angle, a first bevel angle and a second bevel angle. The first group of cut grooves The value range of the apex angle in each groove of the groove is 75°～120°, and the value range of the first oblique angle in each groove of the second group of grooves is 35°～55°, so that the light passing through is completely The reflection mode emits light at a certain angle.

本实用新型采用上述结构所达到的有益效果在于：可以得到一种可避免大角度光的损失，提高光利用率，并可省去棱镜片及扩散片的设置，以达到薄型化设计的导光板结构改良，以及一种利用该导光板结构改良的液晶显示装置。The utility model adopts the above-mentioned structure to achieve the beneficial effects: a light guide plate can be obtained which can avoid the loss of light at large angles, improve the utilization rate of light, and save the setting of the prism sheet and the diffusion sheet, so as to achieve a thinner design. The structure is improved, and a liquid crystal display device utilizing the structure improvement of the light guide plate.

附图说明Description of drawings

图1为第一种习用背光模块的结构示意图；FIG. 1 is a structural schematic diagram of the first conventional backlight module;

图2为第二种习用背光模块的结构示意图；FIG. 2 is a schematic structural diagram of a second conventional backlight module;

图3为本实用新型中导光板第一实施例的结构立体图；Fig. 3 is a perspective view of the structure of the first embodiment of the light guide plate in the present invention;

图4为本实用新型中导光板顶角放大的结构示意图；Fig. 4 is a structural schematic diagram of the magnified top angle of the light guide plate in the utility model;

图5为本实用新型中导光板第二实施例的结构示意图；Fig. 5 is a schematic structural view of the second embodiment of the light guide plate in the present invention;

图6为本实用新型中导光板第三实施例的结构立体图。FIG. 6 is a structural perspective view of the third embodiment of the light guide plate in the present invention.

【图号说明】【Description of figure number】

θ           顶角              11           导光板θ vertex angle 11 light guide plate

12           光源              13           反射膜片12Light source 13 Reflective film

14           下扩散片          15           棱镜片14Lower diffuser 15 Prism sheet

151          棱镜结构          15’         逆棱镜片151 Prism structure 15’ Inverse prism sheet

151’        棱镜结构          16           上扩散片151'Prism structure 16 Upper diffuser

17           液晶面板          20           导光板17LCD panel 20 Light guide plate

21           入光面            22           出光面21 Light-incoming surface 22 Light-emitting surface

23           底面              30           光源23Bottom 30 Light source

24           第一切槽组        25           第二切槽组24 Thefirst grooving group 25 The second grooving group

具体实施方式Detailed ways

为能使贵审查员清楚本实用新型的结构组成，以及整体运作方式，兹配合图式说明如下：In order to make your examiner understand the structure and composition of the utility model, as well as the overall operation mode, it is described as follows with the drawings:

本实用新型导光板的结构改良，主要针对侧光式背光模块架构中导光板加以改良，如图3所示，其导光板20板端部分为入光面21，其正面部分为出光面22，而相对于出光面22并有入光面21相交的底面23，而光源30设置于对应该入光面21的一侧，其光源30可以为点光源(如发光二极管)，使光线得以自该入光面21射入，再由导光板20正面的出光面22射出，以达到光源显示的效果。The structural improvement of the light guide plate of the utility model is mainly aimed at improving the light guide plate in the side-light backlight module structure. As shown in FIG. With respect to the light-emittingsurface 22, there is abottom surface 23 intersected by the light-incident surface 21, and thelight source 30 is arranged on the side corresponding to the light-incidence surface 21. Thelight incident surface 21 enters, and then exits from thelight exit surface 22 on the front of thelight guide plate 20, so as to achieve the effect of light source display.

本案的重点在于：该出光面22及底面23设有第一、二组切槽24、25，如图所示的实施例，该第一、二组切槽24、25为V型沟槽的结构，其截面具有一顶角Y、一第一斜角β及第二斜角α，如图4所示，该第一组切槽24各切槽中顶角Y的取值范围是75°～120°，该第二组切槽25各切槽中第一斜角β的取值范围35°～55°，以使通过的光线由全反射方式以一定出光角度射出，可避免大角度光的损失。The key point of this case is that thelight emitting surface 22 and thebottom surface 23 are provided with first and second sets ofcut grooves 24, 25. In the embodiment shown in the figure, the first and second sets ofcut grooves 24, 25 are V-shaped grooves. structure, its section has a vertex Y, a first bevel β and a second bevel α, as shown in Figure 4, the value range of the vertex Y in the first group ofslits 24 in each slit is 75° ~120°, the value range of the first bevel angle β in each slot of the second group ofslots 25 is 35°~55°, so that the passing light is emitted at a certain light angle by total reflection, which can avoid large-angle light Loss.

另外，该第一、二组切槽24、25可以接续排列的方式设置于导光板20的出光面22及底面23上，如图4所示；亦可如图5所示，各切槽间具有间距，且该间距呈梯度式变化，而光源30可正对于具有间距最大的切槽设置。In addition, the first and second sets ofslits 24, 25 can be disposed on the light-emittingsurface 22 and thebottom surface 23 of thelight guide plate 20 in a continuous arrangement, as shown in FIG. 4 ; There is a pitch, and the pitch changes in a gradient manner, and thelight source 30 can be arranged right in front of the slot with the largest pitch.

具体实施时，该液晶显示装置的背光模块结构如图6所示，由导光板20、设于导光板20板缘位置的光源30、设于导光板20下方的反射膜片13，以及设于导光板20与液晶面板17之间的上扩散片16所构成，其光源30的光线由导光板20入光面21进入导光板20，部分光线由底面23的第二组切槽25均匀射出至出光面22，部分光线则由出光面22的第一组切槽24射出，并由顶角或第一斜角的角度大小，使通过的光线由全反射方式以一定出光角度射出，可避免大角度光的损失，且经由顶角或第一斜角的特殊角度设计，可提高光利用率，并可省去棱镜片以及下扩散片的设置，以达到薄型化的设计。During specific implementation, the backlight module structure of this liquid crystal display device is shown in Figure 6, bylight guide plate 20, thelight source 30 that is arranged on the plate edge position oflight guide plate 20, the reflectingfilm 13 that is arranged on the bottom oflight guide plate 20, and is arranged on Theupper diffuser 16 between thelight guide plate 20 and theliquid crystal panel 17 is composed of light from thelight source 30 entering thelight guide plate 20 from thelight incident surface 21 of thelight guide plate 20, and part of the light is evenly emitted from the second group ofcut grooves 25 on thebottom surface 23 to the On the light-emittingsurface 22, part of the light is emitted from the first group ofcut grooves 24 on the light-emittingsurface 22, and the angle of the top angle or the first oblique angle makes the passing light emit at a certain light-emitting angle by total reflection, which can avoid large The loss of angle light, and through the special angle design of the top angle or the first oblique angle, can improve the light utilization rate, and can save the setting of the prism sheet and the lower diffusion sheet to achieve a thinner design.

如上所述，本实用新型提供侧光式背光模块架另一较佳可行的导光板结构，于是依法提呈新型专利的申请；然而，以上的实施说明及图式所示，是本实用新型较佳实施例，并非以此局限本实用新型，是以，举凡与本实用新型的构造、装置、特征等近似、雷同的，均应属本实用新型的创设目的及申请专利范围之内。As mentioned above, the utility model provides another preferable and feasible light guide plate structure of the side-light backlight module frame, so the application for a new patent is filed according to law; The preferred embodiments are not intended to limit the present utility model, therefore, all similar and identical structures, devices, and features of the present utility model should belong to the creation purpose of the present utility model and within the scope of the patent application.

Claims (12)

Translated fromChinese

1、一种导光板的结构改良，其导光板至少包括有一入光面、一与该入光面相交的底面，以及一与该底面相对的出光面，而光源设置于对应该入光面的一侧；其特征在于：1. A structural improvement of a light guide plate, the light guide plate at least includes a light incident surface, a bottom surface intersecting the light incident surface, and a light exit surface opposite to the bottom surface, and the light source is arranged on the light incident surface One side; characterized in that:该出光面及底面分别设有第一、二组切槽，其第一、二组切槽各切槽的截面具有一顶角、一第一斜角及第二斜角，该第一组切槽各切槽中顶角的取值范围是75°～120°，该第二组切槽各切槽中第一斜角的取值范围是35°～55°。The light-emitting surface and the bottom surface are respectively provided with first and second groups of cut grooves. The cross-sections of the first and second groups of cut grooves each have a top angle, a first bevel angle and a second bevel angle. The first group of cut grooves The value range of the apex angle in each groove of the groove is 75°-120°, and the value range of the first bevel angle in each groove of the second group of grooves is 35°-55°.2、如权利要求1所述导光板的结构改良，其特征在于，该切槽为V型沟槽的结构。2. The structural improvement of the light guide plate according to claim 1, wherein the cut groove is a V-shaped groove structure.3、如权利要求1所述导光板的结构改良，其特征在于，各切槽以接续排列的方式设置。3. The structural improvement of the light guide plate according to claim 1, wherein the slots are arranged in a continuous arrangement.4、如权利要求1所述导光板的结构改良，其特征在于，各切槽间具有间距。4. The structural improvement of the light guide plate according to claim 1, wherein there is a distance between each slot.5、如权利要求4所述导光板的结构改良，其特征在于，各切槽的间距呈梯度式变化，而光源正对于具有间距最大的切槽设置。5. The structural improvement of the light guide plate according to claim 4, characterized in that the pitch of each slot changes in a gradient manner, and the light source is arranged directly facing the slot with the largest pitch.6、如权利要求1所述导光板的结构改良，其特征在于，该光源为点光源。6. The structural improvement of the light guide plate according to claim 1, wherein the light source is a point light source.7、一种液晶显示装置，其特征在于，其至少包含有：7. A liquid crystal display device, characterized in that it at least includes:一导光板，该导光板至少包括有一入光面、一与该入光面相交的底面，以及一与该底面相对的出光面；A light guide plate, which at least includes a light incident surface, a bottom surface intersecting the light incident surface, and a light exit surface opposite to the bottom surface;一光源，设置于导光板入光面的一侧；A light source, arranged on one side of the light incident surface of the light guide plate;一反射片，设置于导光板下方；a reflective sheet arranged under the light guide plate;一扩散片，设置于导光板上方；A diffusion sheet is arranged above the light guide plate;一液晶面板，设置于扩散片上方；a liquid crystal panel, arranged above the diffuser;该出光面及底面分别设有第一、二组切槽，其第一、二组切槽各切槽的截面具有一顶角、一第一斜角及第二斜角，该第一组切槽各切槽中顶角的取值范围是75°～120°，该第二组切槽各切槽中第一斜角的取值范围是35°～55°。The light-emitting surface and the bottom surface are respectively provided with first and second groups of cut grooves. The cross-sections of the first and second groups of cut grooves each have a top angle, a first bevel angle and a second bevel angle. The first group of cut grooves The value range of the apex angle in each groove of the groove is 75°-120°, and the value range of the first bevel angle in each groove of the second group of grooves is 35°-55°.8、如权利要求7所述液晶显示装置，其特征在于，该切槽为V型沟槽的结构。8. The liquid crystal display device according to claim 7, wherein the cut groove is a V-shaped groove structure.9、如权利要求7所述液晶显示装置，其特征在于，各切槽以接续排列的方式设置。9. The liquid crystal display device according to claim 7, wherein the cut grooves are arranged in a continuous arrangement.10、如权利要求7所述液晶显示装置，其特征在于，各切槽间具有间距。10. The liquid crystal display device as claimed in claim 7, wherein there is a distance between each cut groove.11、如权利要求10所述液晶显示装置，其特征在于，各切槽的间距呈梯度式变化，而光源正对于具有间距最大的切槽设置。11. The liquid crystal display device according to claim 10, characterized in that the pitch of each slot changes in a gradient manner, and the light source is arranged directly facing the slot with the largest pitch.12、如权利要求7所述液晶显示装置，其特征在于，该光源为点光源。12. The liquid crystal display device according to claim 7, wherein the light source is a point light source.

Images