A sawtooth structure of a side light guide plate of a high-brightness TFT LCD screen
By designing large and small sawtooth structures and finned heat dissipation design on the light guide plate, the problems of uneven brightness and heat accumulation on the light guide plate are solved, achieving high brightness and uniform display and effective heat dissipation, and extending the service life of the LED light strip.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINFENG FULUSHAN TECHNOLOGY CO LTD
- Filing Date
- 2025-10-15
- Publication Date
- 2026-07-21
AI Technical Summary
The existing serrated structure of the light guide plate causes the light to be concentrated in the LED light area, while the light is insufficient in the area away from the light strip, resulting in uneven brightness. In addition, the heat of the flexible LED light strip cannot be effectively dissipated, leading to light decay.
It adopts a rectangular outer frame, light guide plate, large and small sawtooth structure, combined with fin strips for heat dissipation design, and is fixed by an assembly mechanism. It uses sawtooth structures of different sizes to refract, reflect and scatter light in multiple stages, thereby increasing the heat dissipation area.
It improves the uniformity of screen brightness, avoids bright and dark areas, ensures that LED light strips work normally at high temperatures, and extends their service life.
Smart Images
Figure CN224536308U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LCD screen light guide plate technology, specifically a sawtooth structure for the side light guide plate of a high-brightness TFTLCD screen. Background Technology
[0002] With the development of technology, liquid crystal displays have been widely used in various electronic devices that require display. However, since liquid crystal materials themselves do not have self-emissive properties, a special backlight module is needed to provide a backlight source for the liquid crystal display panel to display images. A light guide plate that scatters the light emitted by the light source using light-emitting diodes provides uniformly scattered light.
[0003] Most light guide plates currently in use typically employ only one size of dot or serration structure, and the density gradient may not be finely optimized. This results in excessively concentrated light on the incident side near the LED light, while areas further away from the light strip are underlit, creating dark areas and poor overall brightness uniformity. Flexible LED light strips are often simply pasted onto a plastic frame, and since plastic is a poor conductor of heat, heat cannot dissipate quickly enough. This causes the LED chips to operate at high temperatures, leading to light decay. Utility Model Content
[0004] The purpose of this invention is to provide a sawtooth structure for the side light guide plate of a high-brightness TFTLCD screen to solve the problems mentioned in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a side light guide plate sawtooth structure for a high-brightness TFTLCD screen, comprising a rectangular outer frame, a lamp cavity, a flexible LED light strip, and a light guide plate body. The lamp cavity is provided on the outer side of the rectangular outer frame, and an assembly mechanism is provided on the outer side of the rectangular outer frame. The assembly mechanism connects the flexible LED light strip to the side of the rectangular outer frame, and simultaneously uses fin strips to cool the heat on the back of the flexible LED light strip. The light guide plate body is connected to the outer side of the rectangular outer frame, and a light guiding mechanism is provided on the outer side of the light guide plate body. The light guide plate body has large and small sawtooths evenly spaced on its surface to ensure that the light from the flexible LED light strip is evenly diffused when it enters the light guide plate body.
[0006] As a preferred technical solution, the assembly mechanism includes a wire hole, a flexible LED light strip, a finned strip, a side flat strip, and a rectangular slot. The wire hole is opened on one side of the rectangular outer frame, the finned strip is provided on the outer side of the rectangular outer frame, the flexible LED light strip is attached to one side of the finned strip, the side flat strip is symmetrically arranged on both sides of the light guide plate, and the rectangular slot is opened through one side of the rectangular outer frame.
[0007] As a preferred technical solution, the rectangular outer frame is connected to the outer side of the flexible LED light strip through the lamp cavity set on the outer side.
[0008] As a preferred technical solution, the rectangular outer frame is connected to the outer side of the side flat strip by symmetrically opened side slots.
[0009] As a preferred technical solution, the light guide mechanism includes a light guide plate, large serrations, small serrations, side slots, and light guide holes. Large serrations are evenly spaced on the outer side of the light guide plate, and small serrations are evenly spaced on the outer side of the light guide plate. The light guide holes are evenly spaced inside the lamp cavity, and the side slots are symmetrically arranged. The light guide plate is located at the inner end of a rectangular outer frame.
[0010] As a preferred technical solution, the rectangular outer frame is arranged parallel to the flexible LED light strip through equally spaced light guide holes.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. This utility model sets large and small sawtooths on the surface of the light guide plate. Through the sawtooth structure of different sizes, the light emitted by the LED light source is refracted, reflected and scattered in multiple stages, so that the originally concentrated or highly directional point or line light source is transformed into a uniform and soft surface light source. The combination design of large and small sawtooths can achieve differentiated scattering in different areas according to optical requirements, improve the overall brightness uniformity, and avoid the phenomenon of bright center and dark edge or bright spot and dark area.
[0013] 2. This utility model achieves precise and firm fixation between the light guide plate and the rectangular outer frame by engaging symmetrically arranged side flat strips with symmetrically opened side slots. This prevents loosening and displacement during use or transportation. The back of the LED light strip is directly and tightly attached to the fin strip. Heat is quickly transferred from the LED light strip to the fin strip through thermal conduction, increasing the surface area in contact with the air. The surrounding air absorbs the heat from the fins, becomes hot, and rises. Cool air is continuously replenished, forming a continuous natural convection. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present utility model;
[0015] Figure 2 This is a schematic diagram of the light guide mechanism of this utility model;
[0016] Figure 3 This is a schematic diagram of the rectangular outer frame of this utility model;
[0017] Figure 4 This is a schematic diagram of the assembly mechanism of this utility model;
[0018] Figure 5This is a schematic diagram of the connection structure between the light guide plate and the rectangular outer frame of this utility model.
[0019] The components include: 1. Rectangular outer frame; 2. Lamp cavity; 3. Wiring hole; 4. Flexible LED light strip; 5. Fin strip; 6. Assembly mechanism; 7. Light guide plate; 8. Large serration; 9. Small serration; 10. Light guide mechanism; 11. Side flat strip; 12. Side slot; 13. Rectangular slot; 14. Light guide through hole. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example: Figures 1 to 5 As shown, this utility model provides the following technical solution: a side light guide plate sawtooth structure for a high-brightness TFTLCD screen, including a rectangular outer frame 1, a lamp cavity 2, a flexible LED light strip 4, and a light guide plate body 7. The lamp cavity 2 is provided on the outer side of the rectangular outer frame 1, and an assembly mechanism 6 is provided on the outer side of the rectangular outer frame 1. The assembly mechanism 6 connects the flexible LED light strip 4 to the side of the rectangular outer frame 1, and at the same time uses fin strips 5 to cool the heat on the back of the flexible LED light strip 4. The light guide plate body 7 is connected to the outer side of the rectangular outer frame 1, and a light guiding mechanism 10 is provided on the outer side of the light guide plate body 7. The light guide plate body 7 has large sawtooth 8 and small sawtooth 9 evenly spaced on its surface to make the light from the flexible LED light strip 4 diffuse evenly when it enters the light guide plate body 7.
[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the assembly mechanism 6 includes a wire hole 3, a flexible LED light strip 4, a finned strip 5, a side flat strip 11, and a rectangular slot 13. The wire hole 3 is opened on one side of the rectangular outer frame 1. The finned strip 5 is provided on the outer side of the rectangular outer frame 1. The flexible LED light strip 4 is attached to one side of the finned strip 5. The side flat strip 11 is symmetrically arranged on both sides of the light guide plate 7. The rectangular slot 13 is opened through one side of the rectangular outer frame 1. The rectangular outer frame 1 is connected to the outer side of the flexible LED light strip 4 through the lamp cavity 2 provided on the outer side. The rectangular outer frame 1 is engaged with the outer side of the side flat strip 11 through symmetrically opened side slots 12.
[0023] Among them, the rectangular outer frame 1 is connected to the side flat strips 11 on both sides of the light guide plate 7 through the side slot 12, so as to achieve precise positioning and firm fixation of the light guide plate 7, and prevent loosening during transportation or use. The wire hole 3 in the assembly mechanism 6 facilitates the passage of the power cord of the LED light strip, making the wiring neater and avoiding damage caused by wire compression.
[0024] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the light guide mechanism 10 includes a light guide plate 7, large serrations 8, small serrations 9, side slots 12, and light guide holes 14. The large serrations 8 are evenly spaced on the outer side of the light guide plate 7, and the small serrations 9 are evenly spaced on the outer side of the light guide plate 7. The light guide holes 14 are evenly spaced inside the lamp cavity 2. The side slots 12 are symmetrically arranged. The light guide plate 7 is located at the inner end of the rectangular outer frame 1. The rectangular outer frame 1 is parallel to the flexible LED light strip 4 through the evenly spaced light guide holes 14.
[0025] Among them, the large sawtooth 8 and the small sawtooth 9 are optical microstructures used to scatter, reflect and homogenize the light entering the light guide plate. The microstructure of the small sawtooth 9 further disrupts the directionality of the light, and through multiple diffuse reflections, the light is evenly distributed inside the light guide plate body 7, thereby improving the uniformity of screen brightness and reducing hot spots and dark areas.
[0026] The working principle of this utility model is as follows:
[0027] The operator places the lamp cavity 2 on the outside of the rectangular outer frame 1, with the opening of the lamp cavity 2 facing the inside of the rectangular outer frame 1, so as to align with the side of the light guide plate 7. The fin strip 5 is cut to the same length as the flexible LED light strip 4 and attached along the bottom or side of the lamp cavity 2, ensuring that the fin strip 5 is in close contact with the outside of the lamp cavity 2. The operator lays the flexible LED light strip 4 inside the lamp cavity 2, with its light-emitting surface facing the side of the light guide plate 7, and fixes it inside the lamp cavity 2 with adhesive or clips. The power cord of the light strip is passed out through the wire hole 3.
[0028] The operator places the flexible LED light strip 4 on the side of the rectangular outer frame 1. The light first enters the lamp cavity 2, and then enters the light guide plate body 7 through the light guide hole 14 or directly through the edge of the light guide plate. The fin strip 5 is close to the back of the flexible LED light strip 4. The flexible LED light strip 4 increases the heat dissipation area and quickly dissipates the heat generated when the flexible LED light strip 4 is working. The light guide hole 14 is a small circular hole, which is opened at the bottom of the lamp cavity 2 and the position corresponding to the side of the light guide plate body 7. Its axis is perpendicular to the light-emitting surface of the flexible LED light strip 4.
[0029] During assembly, the positions of the light guide hole 14 and the flexible LED strip 4 need to be calibrated using optical inspection equipment to ensure that the light emitted from the flexible LED strip 4 can enter the light guide hole 14 vertically or at an angle. The large serrations 8 and small serrations 9 on the surface of the light guide plate 7 are arranged in an alternating or gradient pattern. The large serrations 8 are mainly responsible for initial scattering, which disperses the concentrated light emitted by the LED strip and breaks the straight-line propagation characteristic of the light. The small serrations 9 are responsible for fine adjustment, which redistributes the light scattered by the large serrations 8 to make the light more evenly distributed inside the light guide plate 7.
[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A sawtooth structure for the side light guide plate of a high-brightness TFTLCD screen, comprising a rectangular outer frame (1), a lamp cavity (2), a flexible LED light strip (4), and a light guide plate body (7), characterized in that: A lamp cavity (2) is provided on the outside of the rectangular outer frame (1). An assembly mechanism (6) is provided on the outside of the rectangular outer frame (1). The assembly mechanism (6) connects the flexible LED light strip (4) to the side of the rectangular outer frame (1). At the same time, the fin strip (5) is used to cool the heat on the back of the flexible LED light strip (4). A light guide plate (7) is connected to the outside of the rectangular outer frame (1). A light guide mechanism (10) is provided on the outside of the light guide plate (7). The light guide plate (7) is provided with large serrations (8) and small serrations (9) at equal intervals on its surface to make the light from the flexible LED light strip (4) diffuse evenly when it enters the light guide plate (7).
2. The sawtooth structure of the side light guide plate of a high-brightness TFTLCD screen according to claim 1, characterized in that: The assembly mechanism (6) includes a wire hole (3), a flexible LED light strip (4), a fin strip (5), a side flat strip (11), and a rectangular slot (13). The wire hole (3) is opened on one side of the rectangular outer frame (1). The fin strip (5) is provided on the outer side of the rectangular outer frame (1). The flexible LED light strip (4) is attached to one side of the fin strip (5). The side flat strip (11) is symmetrically arranged on both sides of the light guide plate (7). The rectangular slot (13) is opened through one side of the rectangular outer frame (1).
3. The sawtooth structure of the side light guide plate of a high-brightness TFTLCD screen according to claim 2, characterized in that: The rectangular outer frame (1) is connected to the outer side of the flexible LED light strip (4) through the lamp cavity (2) set on the outside.
4. The sawtooth structure of the side light guide plate of a high-brightness TFTLCD screen according to claim 3, characterized in that: The rectangular outer frame (1) is connected to the outer side of the side flat strip (11) by symmetrically opened side slots (12).
5. The sawtooth structure of the side light guide plate of a high-brightness TFTLCD screen according to claim 1, characterized in that: The light guide mechanism (10) includes a light guide plate (7), large saw teeth (8), small saw teeth (9), side slots (12), and light guide holes (14). Large saw teeth (8) are evenly spaced on the outer side of the light guide plate (7), and small saw teeth (9) are evenly spaced on the outer side of the light guide plate (7). The light guide holes (14) are evenly spaced inside the lamp cavity (2). The side slots (12) are symmetrically provided. The light guide plate (7) is located at the inner end of the rectangular outer frame (1).
6. The sawtooth structure of the side light guide plate of a high-brightness TFTLCD screen according to claim 5, characterized in that: The rectangular outer frame (1) is arranged parallel to the flexible LED light strip (4) through equally spaced light guide holes (14).