Light guide device and backlight module
Through the design of flexible light guide tubes and transparent light inlet and outlet parts, the distance and adjustment of hard light guide columns are solved, flexible adjustment and efficient light transmission are achieved, and user experience and equipment life are improved.
Patent Information
- Application Number
- CN202421017579.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-05-10
AI Technical Summary
Most of the existing light guide column materials are hard materials, which leads to the distance between the light exit and the light entry point that should not be too long and the wiring is fixed, so the wiring position cannot be adjusted.
Flexible light guide tube and transparent light inlet and light out parts are used. The two ends of the flexible light guide tube are connected to the light inlet and light out ends respectively. The light is scattered through the tapered section and the arc-shaped plate design, and transparent plastic material is used to improve optical transparency. and mechanical strength, and fix light guides through snap-on structure for easy adjustment.
It realizes flexible adjustments at the incoming and outgoing light, avoids distance limitations, improves the efficiency and convenience of light transmission, and extends the service life of the equipment.
Smart Images
Figure CN222212994U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of optics, in particular to a light guide device and a backlight module. Background Art
[0002] A light guide is a device that transmits light from a light source to another point at a certain distance from the light source with minimal loss. The light is transmitted inside the light guide by total internal reflection. Light guides are usually made of optical materials, such as acrylic resin, polycarbonate, epoxy resin and glass. Light guides can be used to transmit light from the LED unit on the PCB board to the display panel of the product to display relevant information, and can also gather and guide light for use as the backlight of the LCD display. It can also be used to illuminate the pattern on the transmissive window.
[0003] Most of the existing light guides on the market are made of hard materials. Due to the limitations of material properties, the distance between the light exit and the light entrance should not be too long. In addition, the routing of hard light guides is fixed and its routing position cannot be adjusted. Utility Model Content
[0004] The main purpose of the utility model is to provide a light guide device and a backlight module, aiming to provide a light guide device in which the arrangement of the light entrance and the light exit is not limited by the distance and has better adjustability.
[0005] To achieve the above-mentioned purpose, the light guide device proposed by the utility model comprises:
[0006] A light incident structure, wherein the light incident structure is provided with a transparent light incident member, wherein the transparent light incident member is provided with a first light incident end and a first light emitting end, wherein the first light incident end is used to be connected to a light source of the circuit board;
[0007] A light emitting structure, wherein the light emitting structure is provided with a transparent light emitting member, wherein the transparent light emitting member has a second light incident end and a second light emitting end, wherein the second light emitting end is used to be connected to the display panel; and
[0008] A flexible light guide tube, wherein two ends of the flexible light guide tube are respectively connected to the first light output end and the second light input end.
[0009] In one embodiment, the transparent light incident component includes a plurality of light incident units connected in sequence, wherein the light incident unit is provided with a first prism segment and a tapered segment connected to the end of the first prism segment, and the tapered segment gradually shrinks from the first light incident end to the first light output end.
[0010] In one embodiment, an arc plate is connected between every two adjacent light incident units, the arc plate is respectively connected to two adjacent tapered sections, and the arc plate is bent toward one side of the first light incident end.
[0011] In one embodiment, the transparent light incident member further includes a connecting rod, and two ends of the connecting rod are respectively connected to two adjacent light incident units.
[0012] In one embodiment, the flexible light guide tube is made of transparent plastic material.
[0013] In one embodiment, the light incident structure forms a receiving cavity, the transparent light incident member is arranged in the receiving cavity, the inner side wall of the receiving cavity forms a snap-in hole, the side wall of the transparent light incident member is provided with a snap-in protrusion, and the snap-in protrusion is snap-fitted and fixed to the snap-in hole.
[0014] In one embodiment, a tube hole for inserting the flexible light guide tube is formed at the bottom of the accommodating cavity, and a glue inlet is formed on the side wall of the tube hole.
[0015] In one embodiment, the transparent light emitting member includes a plurality of sequentially connected light emitting units, the light emitting unit includes a gradually expanding section and a second prism section connected to the gradually expanding section, and the gradually expanding section gradually expands from the second light incident end to the second light output end.
[0016] The utility model also provides a backlight module, comprising:
[0017] Light guide device;
[0018] A display panel, the light incident structure and the light emitting structure are arranged on the display panel; and a circuit board, the circuit board is provided with a light source, and the light source is arranged at the first light incident end.
[0019] In one embodiment, a plurality of snap-fit structures are provided on a side of the display panel facing the circuit board, the light incident structure and the light emitting structure are both provided with snap-fit slots, and the snap-fit structures are snap-fitted and fixed to the snap-fit slots.
[0020] The technical solution of the utility model proposes a light guiding device and a backlight module, wherein the light guiding device includes a light input structure, a light output structure and a flexible light guiding tube, the light input structure has a first light input end and a first light output end, the light output structure has a second light input end and a second light output end, the first light input end of the light input structure is connected to the light source of the circuit board, and the second light output end of the light output structure is connected to the display panel, the two ends of the flexible connecting tube are respectively connected to the first light output end and the second light input end, the light is emitted from the light source and enters the light input structure, is transported to the light output structure through the flexible connecting tube, and is then transmitted to the display panel through the light output structure, by adopting the flexible connecting tube, the distance between the light output point and the light input point can be avoided, and the wiring position can be flexibly adjusted. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0022] Figure 1 A schematic structural diagram of an embodiment of a light guide device provided by the utility model;
[0023] Figure 2 A schematic structural diagram of an embodiment of a backlight module provided by the utility model;
[0024] Figure 3 for Figure 1 Structural schematic diagram of the center light-input structure;
[0025] Figure 4 for Figure 3 A cross-sectional view of the light-entering structure;
[0026] Figure 5 for Figure 1 Structural schematic diagram of the center light-emitting structure;
[0027] Figure 6 for Figure 5 A cross-sectional view of the center light-emitting structure;
[0028] Figure 7 for Figure 1 A schematic diagram of the structure of the transparent light-entering element;
[0029] Figure 8 for Figure 1 Schematic diagram of the structure of the transparent light-emitting component.
[0030] Description of Figure Numbers:
[0031] 100. Light-guiding device; 1. Light-incoming structure; 1a. Accommodating cavity; 1b. Snap-fit hole; 1c. Tube hole; 1d. Glue inlet; 11. Snap-fit slot; 2. Transparent light-incoming member; 21. Light-incoming unit; 211. First light-incoming end; 212. First light-emitting end; 213. First prism section; 214. Tapered section; 22. Snap-fit protrusion; 23. Arc plate; 24. Connecting rod; 3. Light-emitting structure; 4. Transparent light-emitting member; 41. Light-emitting unit; 411. Second light-incoming end; 412. Second light-emitting end; 413. Tapered section; 414. Second prism section.
[0032] 1000, backlight module; 200, display panel; 300, circuit board; 310, light source; 400, snap-on structure.
[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0037] A light guide is a device that transmits light from a light source to another point at a certain distance from the light source with minimal loss. The light is transmitted inside the light guide by total internal reflection. Light guides are usually made of optical materials, such as acrylic resin, polycarbonate, epoxy resin and glass. Light guides can be used to transmit light from the LED unit on the PCB board to the display panel of the product to display relevant information, and can also gather and guide light for use as the backlight of the LCD display. It can also be used to illuminate the pattern on the transmissive window.
[0038] Most of the existing light guides on the market are made of hard materials. Due to the limitations of material properties, the distance between the light exit and the light entrance should not be too long. In addition, the routing of hard light guides is fixed and its routing position cannot be adjusted.
[0039] In order to solve the above problems, the utility model proposes a light guide device, which aims to provide a light guide device in which the setting of the light entrance and the light exit is not limited by the distance and has better adjustability. Figures 1 to 8 The present invention is a schematic structural diagram of an embodiment of the light guide device provided by the present invention.
[0040] Please refer to Figures 1 to 8 The utility model provides a light guide device 100, including a light input structure 1, a light output structure 3 and a flexible light guide tube, the light input structure 1 is provided with a transparent light input member 2, the transparent light input member 2 is provided with a first light input end 211 and a first light output end 212, the first light input end 211 is used to connect with a light source 310 of a circuit board 300, the light output structure 3 is provided with a transparent light output member 4, the transparent light output member 4 has a second light input end 411 and a second light output end 412, the second light output end 412 is used to connect with a display panel 200, and the two ends of the flexible light guide tube are respectively connected to the first light output end 212 and the second light input end 411;
[0041] The technical solution of the utility model proposes a light guiding device 100 and a backlight module 1000, wherein the light guiding device 100 includes a light input structure 1, a light output structure 3 and a flexible light guiding tube, the light input structure 1 has a first light input end 211 and a first light output end 212, the light output structure 3 has a second light input end 411 and a second light output end 412, the first light input end 211 of the light input structure 1 is connected to the light source 310 of the circuit board 300, and the second light output end 412 of the light output structure 3 is connected to the display panel 200, and the two ends of the flexible connecting tube are respectively connected to the first light output end 212 and the second light input end 411, light is emitted from the light source 310 and enters the light input structure 1, is transported to the light output structure 3 through the flexible connecting tube, and then is transmitted to the display panel 200 through the light output structure 3, and by adopting the flexible connecting tube, the distance between the light output point and the light input point can be avoided, and the wiring position can be flexibly adjusted.
[0042] It should be noted that a transparent light-incoming member 2 may include a single light-incoming unit 21 for transmitting a light beam, or may be composed of a plurality of light-incoming units 21 arranged in parallel, and the present invention does not limit this. In one embodiment of the present invention, a transparent light-incoming member 2 is provided with two light-incoming units 21. For details, please refer to Figure 1In order to focus the light before entering the flexible light guide tube so as to ensure that the light is not easily lost during transmission, the light input unit 21 includes a first prism section 213 and a tapered section 214. The first prism section 213 is arranged on a side close to the first light input end 211, and the tapered section 214 is arranged at an end of the first prism section 213 away from the first light input end 211. The other end of the tapered section 214 is provided with a first light output end 212. The light guiding channel in the light input unit 21 extends vertically downward from the first light input end 211, and then gradually shrinks, and enters the flexible light guide tube from the first light output end 212. The light is further focused, so that it is not easy to scatter and lose energy.
[0043] To prevent light from crossing between adjacent light-input units 21, that is, light from one light-input unit 21 is refracted to another adjacent light-input unit 21, an arc plate 23 is connected between two adjacent light-input units 21. For details, please refer to Figure 7 and Figure 8 , respectively represent the arc plates 23 set in the light input unit 21 and the light output unit 41 to prevent the adjacent light from interfering with each other. When the light enters the channel of the arc plate 23, the light will be lost under repeated refraction because the arc plate 23 is bent and set upward, so that the light in the light input unit 21 or the light output unit 41 can be prevented from entering another adjacent light input unit 21 or the light output unit 41, thereby preventing the light from interfering with each other. Furthermore, in order to improve the anti-interfering effect, the two ends of the arc plate 23 are respectively set on the two tapered sections 214 of the two light input units 21. Since the light is not easily deflected in the first prism section 213, it is easy to be deflected in the tapered section 214 because the inner wall of the light guide channel is an inclined surface, so the arc plate 23 is connected to the two tapered sections 214. In order to improve the connection strength of the two light input units 21, the transparent light input member 2 also includes a connecting rod 24, and the two ends of the connecting rod 24 are respectively connected to the two adjacent light input units 21, thereby strengthening the connection strength between the light input units 21.
[0044] It should be noted that the material of the flexible light guide is a transparent plastic material, which can be PC (polycarbonate) material or PMMA (polymethyl methacrylate). The present invention does not limit this. In one embodiment of the present invention, the flexible light guide is made of PC material. PC material has excellent optical transparency, can effectively transmit light and maintain low energy loss, thereby achieving efficient light-guiding function. Secondly, PC material has excellent heat resistance and weather resistance, can maintain stable performance under various environmental conditions, and is not prone to deformation or aging. In addition, PC material also has good mechanical strength and impact resistance, can resist the influence of external forces, extend service life and reduce maintenance costs.
[0045] In order to fix the transparent light input member 2 and the transparent light output member 4, the light input structure 1 and the light output structure 3 respectively form a receiving cavity 1a, and the transparent light input member 2 and the transparent light output member 4 are arranged in the receiving cavity 1a of the light input structure 1 and the light output structure 3. In order to fix the transparent light input member 2 and the transparent light output member 4, a snap-in hole 1b is formed on the inner side wall of the receiving cavity 1a, and a snap-in protrusion 22 is provided on the side wall of the transparent light input member 2. The transparent light input member 2 and the transparent light output member 4 are snap-fitted and fixed with the snap-in hole 1b on the inner wall of the receiving cavity 1a through the snap-in protrusion 22, thereby maintaining the stable installation of the transparent light input member 2 and the transparent light output member 4.
[0046] After the transparent light input member 2 and the transparent light output member 4 are fixed, the two ends of the flexible light guide tube are respectively inserted into the tube hole 1c. In order to reliably connect the flexible light guide tube and the transparent light input member 2 and the transparent light output member 4, the ends of the flexible light guide tube and the first light output end 212 and the ends of the flexible light guide tube and the second light input end 411 are glued. To facilitate the glue dispensing operation, the side wall of the tube hole 1c is formed with a glue inlet 1d. For details, please refer to Figure 3 and Figure 4 The hot melt adhesive enters from the adhesive inlet 1d on the side wall of the tube hole 1c, and the molten hot melt adhesive will adhere to the connection of the flexible light guide tube. After the hot melt adhesive solidifies, it will tightly and reliably connect the flexible light guide tube and the transparent light input part 2 and the transparent light output part 4 together, thereby preventing the flexible light guide tube from falling off.
[0047] In order to prevent the light rays formed on the display panel 200 from focusing and generating light spots, which may affect the user experience, the light emitting unit 41 includes a gradually expanding section 413 and a second prism section 414 connected to the gradually expanding section 413. For details, please refer to Figure 8 The gradual expansion design can ensure better divergence of light, thereby better imaging on the display panel 200 and improving the user experience.
[0048] The utility model further provides a backlight module 1000, which includes a light guide device 100, a display panel 200 and a circuit board 300. For details, please refer to Figure 2 The light incident structure 1 and the light output structure 3 are arranged on the display panel 200, the circuit board 300 is provided with a light source 310, and the light source 310 is arranged at the first light incident end 211. The specific structure of the light guide device 100 refers to the above embodiment. Since the backlight module 1000 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.
[0049] In order to fix the light incident structure 1 and the light emitting structure 3, a plurality of snap-in structures 400 are provided on one side of the display panel 200 facing the circuit board 300. Accordingly, the sides of the light incident structure 1 and the light emitting structure 3 are both provided with snap-in grooves 11. For details, please refer to Figure 2Such an arrangement can ensure that the light incident structure 1 and the light output structure 3 are reliably connected to the display panel 200 .
[0050] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A light guide device (100), characterized in that: include: A light incident structure (1), wherein the light incident structure (1) is provided with a transparent light incident member (2), wherein the transparent light incident member (2) is provided with a first light incident end (211) and a first light emitting end (212), wherein the first light incident end (211) is used to be connected to a light source (310) of a circuit board (300); A light emitting structure (3), wherein the light emitting structure (3) is provided with a transparent light emitting member (4), wherein the transparent light emitting member (4) has a second light incident end (411) and a second light emitting end (412), wherein the second light emitting end (412) is used to be connected to a display panel (200); and A flexible light guide tube, wherein two ends of the flexible light guide tube are respectively connected to the first light output end (212) and the second light input end (411).
2. The light guide device (100) according to claim 1, characterized in that: The transparent light input component (2) comprises a plurality of light input units (21) connected in sequence, wherein the light input unit (21) is provided with a first prism segment (213) and a tapered segment (214) connected to the end of the first prism segment (213), and the tapered segment (214) gradually contracts from the first light input end (211) to the first light output end (212).
3. The light guide device (100) according to claim 2, characterized in that: An arc plate (23) is connected between every two adjacent light incident units (21), the arc plate (23) is respectively connected to two adjacent tapered sections (214), and the arc plate (23) is bent toward one side of the first light incident end (211).
4. The light guide device (100) according to claim 3, characterized in that: The transparent light incident member (2) further comprises a connecting rod (24), the two ends of the connecting rod (24) respectively connecting two adjacent light incident units (21).
5. The light guide device (100) according to any one of claims 1 to 4, characterized in that: The flexible light guide tube is made of transparent plastic material.
6. The light guide device (100) according to any one of claims 1 to 4, characterized in that: The light-incoming structure (1) is formed with a receiving cavity (1a), the transparent light-incoming member (2) is arranged in the receiving cavity (1a), the inner side wall of the receiving cavity (1a) is formed with a snap-fitting hole (1b), the side wall of the transparent light-incoming member (2) is provided with a snap-fitting protrusion (22), and the snap-fitting protrusion (22) is snap-fitted and fixed to the snap-fitting hole (1b).
7. The light guide device (100) according to claim 6, characterized in that: The bottom of the accommodating cavity (1a) is formed with a tube hole (1c) for inserting the flexible light guide tube, and the side wall of the tube hole (1c) is formed with a glue inlet (1d).
8. The light guide device (100) according to any one of claims 1 to 4, characterized in that: The transparent light emitting member (4) comprises a plurality of light emitting units (41) connected in sequence, the light emitting unit (41) comprising a gradually expanding section (413) and a second prism section (414) connected to the gradually expanding section (413), the gradually expanding section (413) gradually expanding from the second light input end (411) to the second light output end (412).
9. A backlight module (1000), characterized in that: include: The light guide device (100) according to any one of claims 1 to 8; A display panel (200), wherein the light incident structure (1) and the light output structure (3) are arranged on the display panel (200); as well as A circuit board (300), wherein the circuit board (300) is provided with a light source (310), and the light source (310) is arranged at the first light incident end (211).
10. The backlight module (1000) according to claim 9, characterized in that: A plurality of snap-fit structures (400) are provided on one side of the display panel (200) facing the circuit board (300); the light input structure (1) and the light output structure (3) are both provided with snap-fit grooves (11); and the snap-fit structures (400) are snap-fitted and fixed to the snap-fit grooves (11).