Long strip light guide module
By adopting a long strip design with a trapezoidal light barrier structure in the light guide module, combined with LED light strips, light guide plates, reflective sheets and optical parts, the problem of providing uniform light output performance in a limited space is solved, and a low-cost and efficient optical effect is achieved.
Patent Information
- Application Number
- CN202421278555.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-05
AI Technical Summary
In a limited or specific profile installation space, it is difficult for light guide modules to provide uniform light-out performance without increasing overall cost and structural complexity, especially with the problem of firefly effect.
The design of an elongated light guide module is adopted, including a carrier with a trapezoidal light barrier structure, LED light strips, light guide plates, reflector sheets and optical parts. The trapezoidal light-discrete structure is formed by extension of the assembly groove, the LED light sources are arranged at intervals, the light guide plate and the LED light source are equipped with accommodation holes, and the reflector sheet and optical parts are used to adjust the light.
Through the combination of the trapezoidal light shielding structure and the light guide plate, it effectively blocks defects such as bright packets and bright lines, and achieves uniform light output performance in a limited space, reducing the number of LEDs, thereby reducing costs, power consumption and thermal energy generation.
Smart Images
Figure CN222732687U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of light guide modules, in particular to a long strip light guide module. Background Art
[0002] Light guide modules are commonly used in various electronic devices to provide uniform light to display images or produce decorative lighting effects. Light guide modules are used to convert point light sources into planar light after adjustment and guidance, so as to provide sufficient light for display panels to display images, or to form variable light performance with circuit control. In light guide modules, due to structural design or point light source setting methods, one of the main problems that commonly affect light uniformity and viewing experience is the firefly effect, also known as the hot spot phenomenon. The firefly effect refers to the excessive brightness of certain areas in the light guide module, forming obvious bright spots or bright spots, which in turn affects visual effects, user experience, and product quality.
[0003] In order to improve the firefly effect, there are many related solutions, such as increasing the number of point light sources, adjusting the mixing distance, etc. However, for some applications with more restrictive conditions, such as when the light guide module needs to be installed in a limited or more specific outline such as a narrow and long installation space, if it is implemented according to the existing technical concepts, it may cause the light guide module to significantly increase the overall cost and structural complexity, so that the light guide module can provide uniform light output performance visible to the naked eye in the limited installation space after operation. Therefore, there is currently no better applicable solution.
[0004] In view of this, the inventor, drawing upon his rich experience in the related industry over the years, conceived and proposed a strip-shaped light guide module to provide a new solution for improving uniform light output performance. Utility Model Content
[0005] The purpose of the utility model is to provide a long strip light guide module, which can eliminate the problems of bright spots, bright lines or different colors that affect the uniformity of light output, so as to enhance the light output quality of the light guide module product in the long strip application space.
[0006] To achieve the above-mentioned purpose, the utility model discloses, in one embodiment, a long strip light guide module for electronic devices, comprising: a carrier frame having an assembly groove and a trapezoidal light isolation structure, wherein the trapezoidal light isolation structure is formed by extending from the assembly groove and one side of the assembly groove is the lower bottom surface of the trapezoidal light isolation structure; an LED light bar, wherein the LED light bar is arranged in the assembly groove and comprises a substrate and a plurality of LED light sources, wherein the LED light sources are arranged on the substrate at intervals, and the arrangement spacing of the LED light sources is 30 to 40 mm, wherein the height of the lower bottom surface of the trapezoidal light isolation structure is H, and the height of the LED light sources is h, and the relationship of Hh≥1 mm is satisfied; a light guide plate, which is arranged in the assembly groove, wherein a plurality of accommodating holes are arranged on one side of the light guide plate corresponding to the LED light sources, wherein when the light guide plate is arranged in the assembly groove, the LED light sources are respectively located in the accommodating holes, and the light guide plate is partially blocked by the trapezoidal light isolation structure; a reflective sheet, which is arranged on a waist plane of the trapezoidal light isolation structure; and an optical component, which is arranged on the reflective sheet. Therefore, the light guide module can have excellent uniform light output performance.
[0007] Furthermore, in another embodiment, the angle between the waist plane and the bottom surface of the trapezoidal light-isolating structure is 65-71 degrees, so as to form a better blocking effect relative to the light guide plate and allow the optical element to present a suitable viewing tilt angle.
[0008] In yet another embodiment, it is disclosed that the maximum thickness of the optical element is 1.8-2.2 mm, so as to have a better light emitting effect.
[0009] Considering the production cost, difficulty and application effect, in one embodiment, the carrier is disclosed to be a white PC plastic injection molded part, so as to have good structural rigidity, shielding function and production advantages.
[0010] In addition, in one embodiment, the optical component is a diffuser, and is manufactured by mixing light-guiding material with diffuser particles by injection molding to provide a light-diffusion effect, thereby facilitating improvement of uniformity.
[0011] Or as described in another embodiment, the optical component is a diffuser, and is made by injecting a plastic material into a mold with a textured structure to form an injection molding method. In this way, the surface of the optical component can have atomized patterns during injection molding to facilitate light adjustment.
[0012] Based on the above implementation, in another implementation, the plastic material can be further selected from PC or PMMA materials to maintain excellent optical adjustment performance while reducing material costs.
[0013] Or as disclosed in another embodiment, the optical component is a diffuser, and is made by sandblasting the surface of a light guide material, so that the surface of the optical component can have an atomized structure to facilitate the adjustment of light.
[0014] Based on the above-mentioned embodiment, in another embodiment, the light-guiding material may also be PC or PMMA, which can effectively reduce the manufacturing cost of the component and maintain excellent optical adjustment performance.
[0015] In addition, in order to facilitate fixing of the LED light bar, in one embodiment, the LED light bar is fixed in the assembly groove by gluing.
[0016] In order to avoid unnecessary consumption of light energy, in one embodiment, the LED light source is covered with a light-shielding adhesive material except for the light-emitting surface.
[0017] In another embodiment, an adhesive is respectively provided on two opposite sides of the reflector, one of the adhesives is located between the waist edge plane and the reflector, and the other adhesive is located between the reflector and the optical component, so that the optical component can be fixed on the waist edge plane through the reflector.
[0018] Based on the above embodiments, further, in another embodiment, it is disclosed that the thickness of the adhesive is 0.1-0.2 mm, so as to have sufficient adhesion while not being too thick to affect light transmission.
[0019] In summary, the long strip light guide module of the utility model, through the special trapezoidal light shading structure and the light guide plate, can overcome the problem of uneven brightness and darkness caused by the inability to set the light shading structure or have sufficient light mixing distance in the narrow installation space, greatly improve the overall uniformity of light output, and have the advantages of low manufacturing cost, low operating power consumption and low heat generation. Furthermore, the utility model also proposes many technical features and corresponding functions that can be added to the long strip light guide module, as described in the above paragraphs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of a long strip light guide module according to one embodiment of the utility model.
[0021] Figure 2 The figure is a schematic diagram of the structure of a light guide plate and an LED light strip according to one embodiment of the present invention.
[0022] Figure 3 It is a schematic structural diagram of a long strip light guide module in another implementation state of one embodiment of the utility model. DETAILED DESCRIPTION
[0023] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
[0024] As mentioned above, the spatial state of the light guide module will affect the structural design of the light guide module. When faced with more special spatial conditions, such as narrow and elongated installation occasions, if the light guide module is to maintain the expected light output effect, it is necessary to solve the structural limitations caused by the narrow space. In the past, in order to solve the above problems, the common solution would be to increase the number of LEDs to implement it, but increasing the number of LEDs will lead to problems such as increased overall product costs, increased energy consumption during operation and increased heat energy generated. Therefore, the inventor conceived and proposed to use a special frame structure and a light guide plate to match each other to reduce the number of LEDs while still maintaining excellent uniform light output. Long strip light guide modules. The following is a detailed description of the long strip light guide module proposed in the utility model through diagrams and texts, in which the structural scale, proportion, size, shape or application state shown in each figure is used to illustrate the technical features of the utility model, and it is necessary to explain them first.
[0025] See also Figure 1 , which is a schematic diagram of the structure of a long strip light guide module according to an embodiment of the present invention. The present invention provides a long strip light guide module 1 for use in electronic devices, such as atmosphere lighting on a laptop housing that can switch between different colors and have a time-sequence change effect. The long strip light guide module 1 includes a carrier 10, an LED light bar 11, a light guide plate 12, a reflector 13, and an optical component 14.
[0026] The carrier 10 has an assembly groove 101 and a trapezoidal light-isolating structure 102. The trapezoidal light-isolating structure 102 is formed by extending the assembly groove 101, and one side of the assembly groove 101 is the lower bottom surface 1021 of the trapezoidal light-isolating structure 102. In more detail, the carrier 10 is a long strip structure, for example, a long strip wedge-shaped structure, and the assembly groove 101 is provided on any long side, and the trapezoidal light-isolating structure 102 is formed by extending from one side of the assembly groove 101 toward the other long side of the carrier 10 opposite to the assembly groove 101, so that one side of the assembly groove 101 becomes the lower bottom surface 1021 of the trapezoidal light-isolating structure 102. The LED light bar 11 is arranged in the assembly groove 101 and includes a substrate 111 and a plurality of LED light sources 112. The LED light sources 112 are arranged on the substrate 111 at intervals, and the arrangement spacing of the LED light sources 112 is 30 to 40 mm. The height of the lower bottom surface 1021 of the trapezoidal light-isolating structure 102 is H, and the height of the LED light source 112 is h, which meets the relationship of Hh≥1mm. The light guide plate 12 is also assembled in the assembly groove 101, and a plurality of accommodating holes 121 are provided on one side of the light guide plate 12 corresponding to the LED light source 112. When the light guide plate 12 is assembled in the assembly groove 101, the LED light sources 112 are respectively located in the accommodating holes 121, and a portion of the light guide plate 12 is blocked by the trapezoidal light-isolating structure 102. Optical dots may be provided on the light guide plate 12 to facilitate guiding light, and the optical dot design may also be adjusted according to light output requirements. The substrate 111 may be various circuit boards to facilitate the setting of the LED light source 112 and enable it to obtain driving power and required control, and the LED light sources 112 may be arranged at equal intervals from each other, or may be arranged at different positions with different intervals. For further details, please refer to Figure 2 , which is a schematic diagram of the structure of the light guide plate and the LED light bar according to an embodiment of the utility model. For example, when a mixed light effect of different light colors is required, the spacing of the LED light sources 112 near the middle area can be smaller than the spacing of the LED light sources 112 near the side. Figure 2It can be seen that the LED light sources 112 are arranged at different intervals, and the receiving holes 121 of the light guide plate 12 are opened corresponding to the setting state of the LED light sources 112. However, regardless of the setting state of equal spacing or non-equal spacing, the setting spacing of the LED light sources 112 meets the condition of 30-40 mm. The light guide plate 12 is a long strip structure, and the receiving hole 121 is opened at one of the long sides. In this way, when assembling, the receiving hole 121 of the light guide plate 12 can be assembled downward into the assembly groove 101 and the LED light source 112 can be accommodated in the receiving hole 121. Returning to the trapezoidal light-isolating structure 102, in order for the trapezoidal light-isolating structure 102 to effectively block defects such as bright spots in the light projected from the LED light source 112 to the light guide plate 12, the difference between the height H of the lower bottom surface of the trapezoidal light-isolating structure 102 and the height h of the LED light source 112 needs to be greater than or equal to 1 mm to effectively block the aforementioned light-emitting defects, for example, it can be 1.2, 1.35 mm, 1.5 mm, etc. The reflective sheet 13 is disposed on a waist plane 1022 of the trapezoidal light-isolating structure 102, and the optical element 14 is disposed on the reflective sheet 13 to provide functions such as improving the overall brightness or further improving the uniformity of light emission, and in application, the light will eventually be projected at the optical element 14 for viewing by the user.
[0027] Therefore, the long strip light guide module 1 achieves the goal of shielding the bright spots, bright lines and other defects produced by the light guide plate 12 when the LED light source 112 is acting through the combination of the trapezoidal shading structure 102 and the light guide plate 12. This can solve the problem of having to use a large number of LEDs to increase costs, power consumption and heat generation when it is used in limited spaces without sufficient shading structure or light mixing distance, thereby producing uneven light output such as bright spots and bright lines. This can effectively maintain a uniform viewing state at a low production cost.
[0028] To provide a better viewing experience, the angle θ between the waist plane 1022 and the lower bottom surface 1021 of the trapezoidal light-isolating structure 102 can be 65-71 degrees, such as 68 degrees, 70 degrees, etc., in one implementation state, so that the optical element 14 presents a better tilt state for users to watch.
[0029] In addition, the maximum thickness of the optical element 14 can be 1.8-2.2 mm, so as to provide an appropriate adjustment effect relative to the light, so that the light output performance meets the expected requirements.
[0030] Furthermore, various light adjustment effects, for example, can be obtained by setting a microstructure on the optical element 14 or by mixing and injecting materials. Specifically, when the optical element 14 is a diffuser, the optical element 14 can be made by mixing light-guiding materials with diffusion particles by injection molding, so that the diffusion particles can make the optical element 14 have a light diffusion function after injection molding.
[0031] In addition to manufacturing the optical element 14 in the above manner, another embodiment discloses that the optical element 14 is a diffuser, and is made by injection molding a plastic material through a mold with a texture structure. When the optical element 14 is to have a diffusion effect, the texture structure can be directly set on the mold first, and then the plastic material can be poured. In this way, the optical element 14 formed by injection molding will have a microstructure and a diffusion effect.
[0032] Furthermore, when the optical element 14 is manufactured in the above manner, the plastic material may be a transparent and light-conducting material, such as PC or PMMA material, so that the optical element 14 has both excellent structural rigidity and optical adjustability.
[0033] In addition, when the optical component 14 is a diffuser, it can also be made by sandblasting the surface of a light-guiding material. That is, the optical component 14 can use a light-guiding material with light-guiding properties as a base material, and sandblast the surface of the light-guiding material to achieve an atomization processing effect, so that the surface of the light-guiding material appears non-smooth and thus has excellent light diffusion performance.
[0034] Similarly, when the optical component 14 is manufactured by sandblasting the surface of the light guide material, the light guide material can also be made of transparent material, such as PC or PMMA material, so that the manufactured optical component 14 has good light diffusion properties to improve the light output quality.
[0035] Regarding the support frame 10, it is preferred that the support frame 10 is a white PC plastic injection molded part so as to have excellent structural rigidity and light shielding performance.
[0036] On the other hand, in order to ensure the assembly fixing strength of the LED light bar 11 and consider the convenience in manufacturing, the LED light bar 11 can be fixed in the assembly groove 101 by gluing, that is, the LED light bar 11 is assembled in the assembly groove 101 by adhesive.
[0037] In order to facilitate the rapid assembly of the reflective sheet 13 and the optical element 14 on the waist plane 1022 of the trapezoidal light-isolating structure 102, an adhesive 131 can be provided on two opposite sides of the reflective sheet 13, one adhesive 131 is located between the waist plane 1022 and the reflective sheet 13, and the other adhesive 131 is located between the reflective sheet 13 and the optical element 14. In this way, by preparing adhesive on both sides of the reflective sheet 13 to have a self-adhesive effect, the assembly process can be simplified, so that the reflective sheet 13 and the optical element 14 can be simply and quickly fixed on the waist plane 1022.
[0038] Considering the adhesion effect and light transmission effect, the thickness of the adhesive 131 may be 0.1-0.2 mm, such as 0.15 mm, 0.18 mm, etc.
[0039] Please continue and read Figure 3, which is a schematic diagram of a strip-shaped light guide module in another implementation state of one embodiment of the utility model. In this implementation state, the light-emitting surface of the LED light source 112 is covered by a light-shielding adhesive 15 to enhance the light-shielding effect. Based on the concepts of environmental protection and sustainable management, the carrier frame 10 in actual products is often made of recycled materials, which may result in a slightly insufficient light-shielding ability. The technical feature of covering the area outside the light-emitting surface of the LED light source 112 with the light-shielding adhesive 15 can solve the problem of insufficient light-shielding caused by the material of the carrier frame 10. The light-shielding adhesive 15 can be attached to the LED light source 112 or further covered on the substrate 111 or the substrate 111 and the light guide plate 12. The light-shielding adhesive 15 can also be made of a material with adhesive properties. When the LED light bar 11 is assembled in the assembly groove 101 by gluing, the LED light bar 11 can be bonded and fixed by the light-shielding adhesive 15.
[0040] In summary, the long strip light guide module of the utility model utilizes a carrier frame with a trapezoidal light-shielding structure to effectively block light defects such as bright bags and bright lines, so that the light guide module products limited by limited application space can have extremely excellent light uniformity without the need to set up a large number of LED light sources, eliminating the high cost and high power consumption problems caused by setting up a large number of LED light sources, and providing users with excellent viewing quality. In order to enhance the functional performance of various aspects of the long strip light guide module, the utility model also proposes many examples, such as the angle between the waist plane and the lower bottom surface of the trapezoidal light-shielding structure is 65 to 71 degrees, so as to present a better tilt state for users to watch; or disclose the function and manufacturing of the optical part, such as making the optical part a diffuser, and can be made by injection molding by mixing light-guiding materials with diffused particles; or by injection molding by pouring plastic materials into a mold with a textured structure; or by sandblasting the surface of the light guide material, etc., and the better plastic or light guide material is PC or PMMA; considering the light brightness or light adjustment performance and other factors, the maximum thickness of the optical part can be 1 .8~2.2mm, in order to obtain better performance; the carrier frame can preferably be a white PC material plastic injection part, so as to have both excellent structural rigidity and light-shielding effect; in addition, in order to enable the LED light bar to be quickly and firmly installed in the assembly slot, the LED light bar can be fixed in the assembly slot by gluing; and in order to further improve the shading performance, it can be achieved by covering the light-shielding adhesive material outside the light-emitting surface of the LED light source; in addition, the reflector part can have adhesive glue on its two opposite sides respectively, so as to achieve the goal of quickly fixing the optical parts and the reflector itself to the waist plane through the self-adhesive property. Further, considering the cost and other factors, the thickness of the adhesive glue can be set to 0.1~0.2mm. Hereby reiterated, the long strip light guide module uses a brand-new structural solution to solve the problem of cost, power consumption and heat generation caused by the need to use a large number of LEDs to arrange in a limited space due to the lack of sufficient shading structure and light mixing distance to avoid the bright spots, bright lines and different colors generated by the LEDs, thereby providing uniform and satisfactory light output performance under a lower cost structure.
[0041]
Explanation of symbols
[0042] 1 Long strip light guide module
[0043] 10 Carrying rack
[0044] 101 assembly slot
[0045] 102 Trapezoidal light-isolating structure
[0046] 1021 bottom surface
[0047] 1022 Waist plane
[0048] 11LED light strip
[0049] 111 substrate
[0050] 112LED light source
[0051] 12 Light guide plate
[0052] 13 reflective sheet
[0053] 131 Adhesive
[0054] 14 Optics
[0055] 15 shading adhesive material
[0056] H The height of the bottom surface of the trapezoidal light-isolating structure
[0057] h The height of the LED light source
[0058] θThe angle between the waist plane and the lower base
Claims
1. A strip-shaped light guide module for use in an electronic device, characterized in that: include: A carrier frame having an assembly groove and a trapezoidal light-isolating structure, wherein the trapezoidal light-isolating structure is formed by extending the assembly groove and one side surface of the assembly groove is the lower bottom surface of the trapezoidal light-isolating structure; An LED light bar, wherein the LED light bar is arranged in the assembly groove and comprises a substrate and a plurality of LED light sources, wherein the LED light sources are arranged on the substrate in an interval, and the arrangement interval of the LED light sources is 30 to 40 mm, wherein the height of the lower bottom surface of the trapezoidal light-isolating structure is H, and the height of the LED light source is h, and the relationship of Hh≥1 mm is satisfied; A light guide plate is assembled in the assembly groove, and a plurality of accommodating holes are provided on one side of the light guide plate corresponding to the LED light sources. When the light guide plate is assembled in the assembly groove, the LED light sources are respectively located in the accommodating holes, and a portion of the light guide plate is shielded by the trapezoidal light isolation structure; A reflector, disposed on a waist plane of the trapezoidal light-isolating structure; and The optical component is arranged on the reflecting sheet.
2. The strip-shaped light guide module according to claim 1, characterized in that: The included angle between the waist plane and the lower bottom surface of the trapezoidal light-isolating structure is 65 to 71 degrees.
3. The strip-shaped light guide module according to claim 1, characterized in that: The maximum thickness of the optical component is 1.8-2.2 mm.
4. The strip-shaped light guide module according to claim 1, characterized in that: The carrier frame is a white PC plastic injection molded part.
5. The strip-shaped light guide module according to claim 1, characterized in that: The optical component is a diffusion sheet, and is manufactured by mixing light-guiding material with diffusion particles through injection molding.
6. The strip-shaped light guide module according to claim 1, characterized in that: The optical component is a diffusion sheet and is manufactured by injection molding by pouring a plastic material into a mold with a textured structure.
7. The strip-shaped light guide module according to claim 6, characterized in that: The plastic material is PC or PMMA.
8. The strip-shaped light guide module according to claim 1, characterized in that: The optical component is a diffusion sheet, and is made by sandblasting the surface of a light guide material.
9. The strip-shaped light guide module according to claim 8, characterized in that: The light guide material is PC or PMMA.
10. The strip-shaped light guide module according to claim 1, characterized in that: The LED light strip is fixed in the assembly groove by gluing.
11. The strip-shaped light guide module according to claim 1 or 10, characterized in that: The LED light source is covered with a light-shielding adhesive material except for the light-emitting surface.
12. The strip-shaped light guide module according to claim 1, characterized in that: Two opposite side surfaces of the reflective sheet are respectively provided with an adhesive, any one of the adhesives is located between the waist edge plane and the reflective sheet, and the other adhesive is located between the reflective sheet and the optical element.
13. The strip-shaped light guide module according to claim 12, characterized in that: The thickness of the adhesive is 0.1-0.2 mm.