Lens array of high-light-transmittance liquid crystal display (LCD) backlight module

Abstract

The utility model discloses a high-light-transmittance LCD backlight module lens array which comprises a frame plate, three sets of rotary adjusting mechanisms are rotationally installed in the frame plate, a plurality of sets of Fresnel lenses are annularly arranged in the three sets of rotary adjusting mechanisms, and cylindrical convex lenses are filled in the space between every two sets of Fresnel lenses. Through the design of the Fresnel lens and the cylindrical convex lens and the mutual cooperation of the Fresnel lens and the cylindrical convex lens, the condensation effect can be further enhanced, the light is more intensively projected to a required area, meanwhile, the uniformity of the light is improved, the brightness difference in a display picture is reduced, and the display definition and contrast are improved.

Description

Technical Field

[0001] This utility model relates to the field of LCD backlight module technology, specifically to a high transmittance LCD backlight module lens array. Background Technology

[0002] With the widespread application of liquid crystal display (LCD) technology in consumer electronics, automotive displays, industrial monitoring, and other fields, the optical performance of backlight modules has become one of the key factors determining display quality. High transmittance and good uniformity in backlighting not only improve image clarity and contrast but also reduce energy consumption and enhance the user experience.

[0003] However, traditional backlight modules mostly rely on a single type of lens and have limitations in terms of light utilization, angle adjustment flexibility and spatial adaptability, making it difficult to meet the stringent requirements of diverse scenarios. Therefore, a high transmittance LCD backlight module lens array is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a high-transmittance LCD backlight module lens array to solve the problems mentioned in the background art, such as limitations in light utilization, angle adjustment flexibility and spatial adaptability, which make it difficult to meet the stringent requirements of diverse scenarios.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-transmittance LCD backlight module lens array includes: a frame plate, in which three sets of adjustment mechanisms are rotatably mounted, and each of the three sets of adjustment mechanisms contains multiple sets of Fresnel lenses arranged in a ring, and cylindrical convex lenses are filled in the gap between every two sets of Fresnel lenses.

[0007] Preferably, the tuning mechanism includes a first rotating ring, a second rotating ring, and a third rotating ring. The first rotating ring is fixedly installed inside the frame plate. Damping grooves are provided on the inner ring walls of both the first and second rotating rings. Damping rings are fixedly installed on the outer surfaces of both the third and second rotating rings, so that the third and second rotating rings can be rotatably installed in the damping grooves of the second and first rotating rings respectively through the damping rings.

[0008] Preferably, a first limiting ring and a second limiting ring are respectively formed on the surfaces of the first rotating ring, the second rotating ring and the third rotating ring, the second limiting ring is formed between every two sets of first limiting rings, and Fresnel lenses and cylindrical convex lenses are respectively filled in the first limiting rings and the second limiting rings.

[0009] Preferably, this allows the second and third rotating rings to respectively drive the Fresnel lens and cylindrical convex lens arranged in a ring to rotate in position, so that they can flexibly change the propagation direction and convergence degree of light according to actual needs to adapt to different display requirements.

[0010] Preferably, the addition of a cylindrical convex lens between every two sets of Fresnel lenses can fully utilize the optical characteristics of both. The Fresnel lens has the function of converging or collimating light, while the cylindrical convex lens has the effect of converging or diffusing light in a specific direction. Together, they can further enhance the light-gathering effect, allowing the light to be projected more concentratedly onto the desired area, while improving the uniformity of light, reducing the difference in brightness in the displayed image, and improving the clarity and contrast of the display.

[0011] Preferably, both the upper and lower surfaces of the second and third rotating rings are fixedly equipped with convex rings, and the outer surfaces of both sets of convex rings are fixedly equipped with multiple sets of plastic convex balls. The plastic convex balls can be driven to be embedded into the limiting groove and plastically extruded from the limiting groove along with the second and third rotating rings. The limiting groove is opened on the inner ring wall of the first and second rotating rings.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. Through the design of Fresnel lenses, cylindrical convex lenses, and adjustment mechanisms, the Fresnel lenses are arranged in a ring within three sets of adjustment mechanisms, with a set of cylindrical convex lenses placed between every two sets of Fresnel lenses. This maximizes the utilization of the adjustment mechanism's area space and allows the combined use of Fresnel and cylindrical convex lenses to fully leverage their optical properties. Fresnel lenses converge or collimate light, while cylindrical convex lenses converge or diffuse light in specific directions. Their combined effect further enhances the light-gathering effect, allowing light to be projected more concentratedly onto the desired area while improving light uniformity. It reduces the difference in brightness and darkness in the displayed image, improves the clarity and contrast of the display, and allows the operator to rotate the Fresnel lens and cylindrical convex lens during assembly to ensure precise alignment of the optical axes of the Fresnel lens and cylindrical convex lens, compensate for light refraction deviation, avoid spot shift or uneven brightness caused by installation errors, improve the optical consistency of the backlight module, and for LCD screens of different sizes and resolutions, or different types of backlights, such as side-lit and direct-lit, the convergence direction and light distribution of the lens array can be quickly adjusted through the rotation mechanism to meet differentiated optical design requirements.

[0014] 2. Through the design of the first rotating ring, second rotating ring, third rotating ring, damping ring, and plastic convex ball, during the assembly of the frame plate, the operator can rotate the second and third rotating rings to drive the Fresnel lens in the first and second limiting rings and the cylindrical convex lens between them to adjust their positions. This allows the light propagation direction and convergence degree to be flexibly changed according to actual needs to adapt to different display requirements. During the rotation of the second and third rotating rings, the damping rings, which are fixedly installed on the outer surface, will rotate in a damped manner within the damping grooves opened in the first and second rotating rings. At the same time, the second and third rotating rings will also drive the plastic convex ball on the outer surface of the upper and lower convex rings to be inserted into the limiting grooves and plastically squeezed out of the limiting grooves. This makes it less likely to shift due to vibration, external force collision, or user accidental touch after adjustment, maintaining the fixed angle of the lens array and ensuring the long-term stability of the backlight module. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the lens array of the high-transmittance LCD backlight module of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the three sets of rotating rings of this utility model;

[0017] Figure 3 This is a schematic diagram of the rotary adjustment mechanism of this utility model.

[0018] In the diagram: 1. Frame plate; 101. Fresnel lens; 102. Cylindrical convex lens; 2. Rotation mechanism; 201. First rotating ring; 202. Second rotating ring; 203. Third rotating ring; 204. First limiting ring; 205. Second limiting ring; 206. Convex ring; 207. Plastic convex sphere; 208. Damping ring; 209. Damping groove; 210. Limiting groove. Detailed Implementation

[0019] 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.

[0020] like Figure 1 As shown, this embodiment provides a high transmittance LCD backlight module lens array, including: a frame plate 1, three sets of adjustment mechanisms 2 are rotatably installed in the frame plate 1, and multiple sets of Fresnel lenses 101 are arranged in a ring in each of the three sets of adjustment mechanisms 2, and cylindrical convex lenses 102 are filled in the gap between every two sets of Fresnel lenses 101.

[0021] Through the design of Fresnel lenses 101, cylindrical convex lenses 102, and adjusting mechanisms 2, the Fresnel lenses 101 are arranged in a ring within three sets of adjusting mechanisms 2, and a set of cylindrical convex lenses 102 is filled in the gap between every two sets of Fresnel lenses 101. This maximizes the use of the area space of the adjusting mechanisms 2, and the combined use of Fresnel lenses 101 and cylindrical convex lenses 102 can fully utilize the optical characteristics of both. Fresnel lenses 101 have the function of converging or collimating light, while cylindrical convex lenses 102 have the effect of converging or diffusing light in a specific direction. Their cooperation can further enhance the light-gathering effect, allowing the light to be projected more concentratedly onto the desired area, while improving... The uniformity of light reduces the difference in brightness in the displayed image, improving the clarity and contrast of the display. During assembly, the operator can rotate the adjustment mechanism 2 to adjust the position of the Fresnel lens 101 and the cylindrical convex lens 102, ensuring precise alignment of the optical axes of the Fresnel lens 101 and the cylindrical convex lens 102. This compensates for light refraction deviations, avoids light spot shifts or uneven brightness caused by installation errors, and improves the optical consistency of the backlight module. Furthermore, for LCD screens of different sizes and resolutions, or different types of backlights, such as side-lit and direct-lit backlights, the adjustment mechanism 2 can quickly adjust the convergence direction and light distribution of the lens array to meet differentiated optical design requirements.

[0022] like Figures 2-3 As shown, the tuning mechanism 2 includes a first rotating ring 201, a second rotating ring 202, and a third rotating ring 203. The first rotating ring 201 is fixedly installed inside the frame plate 1. Damping grooves 209 are provided on the inner ring walls of the first rotating ring 201 and the second rotating ring 202. Damping rings 208 are fixedly installed on the outer surfaces of the third rotating ring 203 and the second rotating ring 202, so that the third rotating ring 203 and the second rotating ring 202 can be rotatably installed in the damping grooves 209 of the second rotating ring 202 and the first rotating ring 201 respectively through the damping rings 208.

[0023] First limiting rings 204 and second limiting rings 205 are respectively formed on the surfaces of the first rotating ring 201, the second rotating ring 202 and the third rotating ring 203. The second limiting rings 205 are formed between every two sets of first limiting rings 204. Fresnel lenses 101 and cylindrical convex lenses 102 are respectively filled in the first limiting rings 204 and the second limiting rings 205. This allows the second rotating ring 202 and the third rotating ring 203 to drive the Fresnel lenses 101 and cylindrical convex lenses 102 arranged in a ring to rotate their positions, so that they can flexibly change the direction of light propagation and the degree of convergence according to actual needs to adapt to different display requirements.

[0024] Furthermore, by filling a set of cylindrical convex lenses 102 between every two sets of Fresnel lenses 101, the optical characteristics of both can be fully utilized. The Fresnel lenses 101 have the function of converging or collimating light, while the cylindrical convex lenses 102 have the effect of converging or diffusing light in a specific direction. They work together to further enhance the light-gathering effect, so that the light is projected more concentratedly onto the required area, while improving the uniformity of light, reducing the difference in brightness in the displayed image, and improving the clarity and contrast of the display.

[0025] Both the upper and lower surfaces of the second rotating ring 202 and the third rotating ring 203 are fixedly equipped with convex rings 206. Multiple sets of plastic convex balls 207 are fixedly installed on the outer surfaces of both sets of convex rings 206. The plastic convex balls 207 can be driven to be embedded into the limiting groove 210 and plastically extruded from the limiting groove 210 as the second rotating ring 202 and the third rotating ring 203 are driven to be embedded into the limiting groove 210. The limiting groove 210 is opened on the inner ring wall of the first rotating ring 201 and the second rotating ring 202.

[0026] Through the design of the first rotating ring 201, the second rotating ring 202, the third rotating ring 203, the damping ring 208, and the plastic convex sphere 207, during the assembly of the frame plate 1, the operator can rotate the second rotating ring 202 and the third rotating ring 203 to adjust the position of the Fresnel lens 101 within the first limiting ring 204 and the second limiting ring 205, and the cylindrical convex lens 102 between them. This allows for flexible adjustment of the light propagation direction and convergence degree according to actual needs, adapting to different display requirements. Furthermore, rotating the second rotating ring 202... During the process of the third rotating ring 203, the damping ring 208 fixedly installed on the outer surface will rotate in a damped manner within the damping groove 209 opened in the first rotating ring 201 and the second rotating ring 202. At the same time, the second rotating ring 202 and the third rotating ring 203 will also drive the plastic convex ball 207 on the outer surface of the upper and lower surface convex ring 206 to be embedded in the limiting groove 210 and plastically squeezed out from the limiting groove 210, so that it is not easy to shift due to vibration, external force collision or user accidental touch after adjustment, maintain the fixed angle of the lens array, and ensure the long-term stability of the backlight module.

[0027] Based on the above technical solution, the working steps of this solution are summarized as follows: Fresnel lenses 101 and cylindrical convex lenses 102 are arranged in a ring and installed within the first limiting ring 204 and the second limiting ring 205 of the first rotating ring 201, the second rotating ring 202, and the third rotating ring 203. The cylindrical convex lenses 102 are located within the spacing between every two sets of Fresnel lenses 101. The combined use of Fresnel lenses 101 and cylindrical convex lenses 102 can fully utilize the optical characteristics of both. Fresnel lenses 101 have the function of converging or collimating light, while cylindrical convex lenses 102 have the effect of converging or diffusing light in a specific direction. Their cooperation can further enhance the light-gathering effect, allowing the light to be projected more concentratedly onto the required area, while improving the uniformity of light, reducing the difference in brightness in the displayed image, and allowing the operator to adjust the second rotating ring during assembly. Ring 202 and third rotating ring 203 drive the Fresnel lens 101 in the first limiting ring 204 and the cylindrical convex lens 102 between them to rotate in position. This allows them to flexibly change the direction of light propagation and the degree of convergence according to actual needs to adapt to different display requirements. During the rotation of the second rotating ring 202 and the third rotating ring 203, they are rotated in a damped manner within the damping groove 209 opened in the first rotating ring 201 and the second rotating ring 202 by damping rings 208 fixedly installed on the outer surface. At the same time, the second rotating ring 202 and the third rotating ring 203 also drive the plastic convex ball 207 on the outer surface of the upper and lower surface convex rings 206 to be embedded in the limiting groove 210 and plastically squeezed out of the limiting groove 210. This makes it less likely to be displaced due to vibration, external force collision or user accidental touch after adjustment, maintaining the fixed angle of the lens array and ensuring the long-term stability of the backlight module.

[0028] In summary, the combination of Fresnel lens 101 and cylindrical convex lens 102 further enhances the light-gathering effect, allowing light to be projected more concentratedly onto the desired area. It also improves light uniformity, reduces brightness differences in the displayed image, and enhances clarity and contrast. Furthermore, during assembly, the positions of Fresnel lens 101 and cylindrical convex lens 102 can be adjusted to ensure precise alignment of their optical axes, compensating for light refraction deviations and preventing spot shifts or uneven brightness caused by installation errors, thus improving the optical consistency of the backlight module.

[0029] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high transmission LCD backlight module lens array, characterized in that, include: The frame plate (1) has three sets of adjustment mechanisms (2) rotatably installed inside it. Each of the three sets of adjustment mechanisms (2) has multiple sets of Fresnel lenses (101) arranged in a ring, and a cylindrical convex lens (102) is filled in the gap between each two sets of Fresnel lenses (101).

2. The high-transmission LCD backlight lens array of claim 1, wherein: The tuning mechanism (2) includes a first rotating ring (201), a second rotating ring (202) and a third rotating ring (203). The first rotating ring (201) is fixedly installed inside the frame plate (1). The inner ring walls of the first rotating ring (201) and the second rotating ring (202) are provided with damping grooves (209). The outer surfaces of the third rotating ring (203) and the second rotating ring (202) are fixedly installed with damping rings (208), so that the third rotating ring (203) and the second rotating ring (202) can be rotatably installed in the damping grooves (209) of the second rotating ring (202) and the first rotating ring (201) respectively through the damping rings (208).

3. The high-transmission LCD backlight lens array of claim 2, wherein: The first rotating ring (201), the second rotating ring (202) and the third rotating ring (203) are respectively provided with a first limiting ring (204) and a second limiting ring (205). The second limiting ring (205) is provided between every two sets of first limiting rings (204). The first limiting ring (204) and the second limiting ring (205) are respectively filled with Fresnel lens (101) and cylindrical convex lens (102).

4. A high transmittance LCD backlight module lens array according to claim 3, characterized in that: The second rotating ring (202) and the third rotating ring (203) can respectively drive the Fresnel lens (101) and the cylindrical convex lens (102) arranged in a ring to rotate in position.

5. A high transmission LCD backlight module lens array according to claim 4, characterized in that: The upper and lower surfaces of the second rotating ring (202) and the third rotating ring (203) are both fixedly equipped with protruding rings (206).

6. The high-transmission LCD backlight lens array of claim 5, wherein: Multiple sets of plastic convex balls (207) are fixedly installed on the outer surface of both sets of convex rings (206). The plastic convex balls (207) can be driven to be embedded into the limiting groove (210) and plastically extruded from the limiting groove (210) along with the second rotating ring (202) and the third rotating ring (203). The limiting groove (210) is opened on the inner ring wall of the first rotating ring (201) and the second rotating ring (202).

Images