Backlight module and display equipment
By using an elastic baffle inside the mid-frame of the backlight module to buffer and dampen the light guide plate, the environmental pollution and increased costs caused by silicone pads are solved, achieving the effects of environmentally friendly production and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-27
- Publication Date
- 2026-03-27
AI Technical Summary
The use of silicone pads as a buffer structure in existing backlight modules increases the emission of chemical additives, leading to environmental pollution and increased material costs.
The frame is equipped with multiple elastic baffles, which are fixed in the loading space by a hollow suspension method and abut against the outside of the light guide plate. The elastic compression and rebound of the baffles are used to buffer and dampen the light guide plate, reducing the use of auxiliary materials.
It effectively protects the light guide plate, reduces the emission of chemical additives, avoids environmental pollution, and lowers production costs, while improving the stability and service life of the light guide plate.
Smart Images
Figure CN224052528U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to display field especially relates to a backlight unit and display equipment. BACKGROUND
[0002] Display equipment as a kind of visual interface for providing man-machine interaction, everywhere in life. In the display equipment of light guide plate conduction light source, for example, backlight unit display, in the transportation process of product, light guide plate will have relative motion inside backlight unit, to avoid the wear and tear of coating on the surface of light guide plate, the activity gap of light guide plate needs to be limited, but because light guide plate has shrinkage and expansion characteristics, for example, the material (such as PMMA) prepared light guide plate will swell due to water absorption in high humidity environment, and the expansion coefficient can reach about 3 ‰, when the size of light guide plate changes, there needs to be swelling space, and then need to be equipped with buffer structure on the four sides of light guide plate, to buffer and shock-absorbing function for light guide plate;The buffer structure on the market generally uses silica gel pad, after assembling multiple silica gel pads to backlight unit, silica gel pad can limit the activity space of light guide plate, and also avoid the warping of light guide plate caused by the lack of extension space after the thermal expansion of light guide plate, and in the process of product transportation, light guide plate can also play the role of buffering and shock-absorbing, to avoid the friction between light guide plate and diaphragm to damage the coating of light guide plate and produce white spot abnormality.
[0003] However, the use of silica gel pad will increase the emission of chemical auxiliaries, thereby polluting the environment, and also increase the material cost of product. INVENTION CONTENTS
[0004] The embodiment of the utility model provides a kind of backlight unit and display equipment, to reduce the use of auxiliary materials when producing backlight unit, reduce chemical auxiliaries emission, avoid pollution to environment, and reduce production cost.
[0005] The utility model provides a kind of backlight unit, it includes:
[0006] Middle frame, the multiple elastic flaps are equipped with in the circumferential direction of the middle frame, one end of the flap is fixedly connected with the side surface of the middle frame, and the other end is hollow suspended into the loading space formed by the middle frame;
[0007] Light guide plate, the light guide plate is fixed in the loading space, and the outer side of the light guide plate is in abutment with the side of the flap.
[0008] In the backlight unit provided by the utility model, the flap includes cantilever and abutment part, one end of the cantilever is fixedly connected with the middle frame, the other end extends towards the direction of the light guide plate and is connected with the abutment part, and the side of the abutment part is in abutment with the outer side of the light guide plate.
[0009] In the backlight module, the cantilever is of an inclined structure, and is arranged to extend from one end connected with the middle frame to the direction of the light guide plate.
[0010] In the backlight module, the inclination angle of the cantilever is 3°-5°.
[0011] In the backlight module, the cantilever is provided with a reinforcing rib, the reinforcing rib extends from one end of the cantilever connected with the middle frame to the direction away from the light guide plate, and the reinforcing rib is fixedly connected with the middle frame.
[0012] In the backlight module, the side surface of the abutting portion abutting with the light guide plate is provided with a plurality of rib strips, the plurality of rib strips are arranged at intervals along the length direction of the abutting portion, and the rib strips abut with the side wall reflection strips of the light guide plate.
[0013] In the backlight module, the rib strip is of a semi-cylindrical structure.
[0014] In the backlight module, the plurality of baffle pieces are respectively located at the left side, the right side and the top side of the middle frame.
[0015] In the backlight module, the baffle piece and the middle frame are integrally injection molded.
[0016] The utility model also provides a display device, it includes:
[0017] The backlight module is the backlight module of any one of the above.
[0018] The application is provided with a plurality of elastic baffle pieces in the inside of the middle frame, and the baffle pieces are fixed in the loading space in a hollow suspension mode, one side of the baffle piece abuts with the outside of the light guide plate, so that the baffle piece is compressed when the light guide plate expands, and the baffle piece rebounds when the light guide plate restores, so as to ensure the gap between the baffle piece and the light guide plate, the baffle piece has a buffering and damping effect on the light guide plate, so as to better protect the light guide plate; when the backlight module is produced, the use of auxiliary materials can be reduced, so as to reduce the emission of chemical auxiliaries, avoid pollution to the environment, and also reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0020] Figures la-b is a sectional view of the backlight module in the embodiment of the utility model;
[0021] Figure 2 is an exploded view of the backlight module in the embodiment of the utility model;
[0022] Figure 3 is a structural view of the blocking sheet in the embodiment of the utility model;
[0023] Figure 4 is an assembly position view of the blocking sheet and the middle frame in the embodiment of the utility model;
[0024] Figure 5 is Figure 4 is an enlarged view of A in the middle.
[0025] Reference signs in the drawings are as follows:
[0026] 1, middle frame; 11, blocking sheet; 111, cantilever; 1111, reinforcing rib; 112, abutting portion; 1121, rib; 12, loading space; 2, light guide plate; 21, side wall reflection strip; 31, back plate; 32, reflection film; 33, diaphragm. DETAILED DESCRIPTION
[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. Now, the preferred embodiments of the utility model will be described in detail with reference to the drawings.
[0028] Referring to Figures la to 5 , an embodiment of the backlight module and display device of the utility model is shown. The backlight module comprises a middle frame 1 and a light guide plate 2, the middle frame 1 is provided with a plurality of elastic blocking sheets 11 at intervals along the circumference, one end of the blocking sheet 11 is fixedly connected with one side surface of the middle frame 1, and the other end is hollowly suspended into the loading space 12 formed by the middle frame 1, the light guide plate 2 is fixedly arranged in the loading space 12, and the outer side of the light guide plate 2 abuts with one side of the blocking sheet 11.
[0029] Specifically, the backlight module is a "light source engine" of a display, responsible for uniformly distributing light to the entire screen; the backlight module includes a middle frame 1 and a light guide plate 2, the middle frame 1 is used to fix other structural parts of the backlight module, including a film 33, a light guide plate 2, a reflective film 32, a back plate 31, etc., the middle frame 1 is generally a rectangular structure, and the middle frame 1 encloses a loading space 12, the loading space 12 is used to accommodate other structural parts of the backlight module, the middle frame 1 plays an important role in protecting the internal structural parts of the backlight module, ensuring the structural stability of the backlight module; the middle frame 1 is provided with a plurality of baffles 11, the plurality of baffles 11 are arranged at intervals along the circumference of the middle frame 1, and the baffle 11 is arranged inside the middle frame 1, one end of the baffle 11 is fixedly connected with one side of the middle frame 1, the cantilever 111 extends from the side connected with the middle frame 1 to the other side of the middle frame 1, at the same time, the other end of the baffle 11 extends in the direction of the loading space 12, and the other end of the baffle 11 is hollow and hung in the loading space 12, therefore, the baffle 11 is fixed in the middle frame 1 in a hanging manner, at the same time, the baffle 11 has elasticity, so that the baffle 11 has compressibility and resilience, so as to realize the functions of buffering and shock absorption.
[0030] The light guide plate 2 is the "heart" of the backlight module, which has the functions of propagating light, uniformly scattering and efficiency control, and needs to work cooperatively with other structural parts, such as light source, film 33, reflective film 32, etc.; the light guide plate 2 is fixed in the loading space 12, and the outer side of the light guide plate 2 abuts against one side of the baffle 11, that is, the baffle 11 blocks the outer side of the light guide plate 2.
[0031] Therefore, when the light guide plate 2 is heated and expands due to water absorption, the light guide plate 2 will deform in the direction of the baffle 11 (X-axis direction) and in the direction of the screen (Y-axis direction). Since the middle frame 1 is circumferentially spaced apart from the baffle 11, and the baffle 11 is arranged outside the light guide plate 2, the baffle 11 is elastic, and when the light guide plate 2 expands, the baffle 11 will move outwardly against the baffle 11, and at this time, the baffle 11 is compressed, so that the baffle 11 better protects the light guide plate 2, and the light guide plate 2 has enough space to expand, avoiding the phenomenon that the light guide plate 2 is warped due to the lack of extension space after expansion. When the light guide plate 2 returns to its original state, the baffle 11 rebounds under the action of force, so that the baffle 11 also returns to the original position with the light guide plate 2, thereby ensuring the gap between the baffle 11 and the light guide plate 2, so that the baffle 11 can tightly adhere to the outside of the light guide plate 2 when the light guide plate 2 is in the expanded state and the restored state, and the baffle 11 can buffer and dampen the light guide plate 2, thereby protecting the light guide plate 2. At the same time, the light guide plate 2 and the diaphragm 33 can also avoid rubbing and damaging the coating of the light guide plate 2 to produce white spot abnormalities during product transportation.
[0032] The present application is characterized in that a plurality of elastic baffles 11 are arranged inside the middle frame 1, and the baffles 11 are arranged in a hollow suspension manner in the loading space 12, one side of the baffle 11 abuts against the outside of the light guide plate 2, so that the baffle 11 is compressed when the light guide plate 2 expands, and the baffle 11 rebounds when the light guide plate 2 returns to its original state, thereby ensuring the gap between the baffle 11 and the light guide plate 2, and the baffle 11 has a buffering and damping effect on the light guide plate 2, thereby better protecting the light guide plate 2. In the production of the backlight module, the use of auxiliary materials can be reduced, thereby reducing the emission of chemical auxiliaries, avoiding pollution to the environment, and reducing production costs.
[0033] In an embodiment, referring to Figure 3As shown, the baffle 11 includes a cantilever 111 and an abutting portion 112, one end of the cantilever 111 is fixedly connected with the middle frame 1, the other end extends towards the direction of the light guide plate 2 and is connected with the abutting portion 112, one side of the abutting portion 112 abuts with the outside of the light guide plate 2. Specifically, the baffle 11 is provided in a hollow suspended manner in the loading space 12, so that the baffle 11 has sufficient space to be compressed and rebound, thereby ensuring the buffering and shock absorption effect of the baffle 11 on the light guide plate 2; the baffle 11 includes a cantilever 111 and an abutting portion 112, one end of the cantilever 111 is fixedly connected with the inner wall of the middle frame 1, the other end extends towards the direction of the light guide plate 2, and the other end of the cantilever 111 is fixedly connected with the abutting portion 112, therefore, the cantilever 111 is hollow suspended in the loading space 12, the cantilever 111 forms a cantilever 111 type elastic structure, thereby making the baffle 11 have compressibility and resilience, one side of the abutting portion 112 abuts with the outside of the light guide plate 2, thereby ensuring the contact area of the light guide plate 2 and the baffle 11, and ensuring the structural stability of the baffle 11 and the light guide plate 2.
[0034] When the light guide plate 2 expands, the light guide plate 2 exerts a force on the abutting portion 112, and the cantilever 111 is compressed after being stressed, thereby ensuring that the light guide plate 2 has sufficient space to expand; when the light guide plate 2 returns to the original state, the cantilever 111 rebounds to make the abutting portion 112 return to the initial position, thereby ensuring the gap between the abutting portion 112 and the light guide plate 2 to buffer and absorb the shock of the light guide plate 2.
[0035] In specific embodiments, referring to Figure 3 As shown, the cantilever 111 is an inclined structure, and is arranged to extend from one end connected with the middle frame 1 towards the direction of the light guide plate 2. Specifically, the cantilever 111 is arranged as an inclined structure, that is, one end of the cantilever 111 is fixedly connected with the inner wall of the middle frame 1, the other end of the cantilever 111 is arranged to extend towards the direction of the light guide plate 2, and the cantilever 111 extends from one side connected with the middle frame 1 to the other side of the middle frame 1, thereby making the cantilever 111 hollow and inclined suspended in the loading space 12, the inclined direction of the cantilever 111 is arranged to face the direction (X-axis direction) of the light guide plate 2 expanding towards the baffle 11, thereby increasing the elasticity of the cantilever 111 to the expansion direction of the light guide plate 2, to improve the service life of the baffle 11, and improve the efficiency of the cantilever 111 when rebounding.
[0036] In an embodiment, the cantilever 111 has an inclination angle of 3-5° (not shown in the figure). Specifically, the inclination angle between the vertical line of the end of the cantilever 111 fixedly connected with the middle frame 1 and the extension direction of the cantilever 111 is set to 3-5°, so that the elasticity of the cantilever 111 can be increased as much as possible while the structural strength of the cantilever 111 is ensured, thereby improving the service life and rebound efficiency of the baffle 11.
[0037] In specific embodiments, as shown in Figure 3 and Figure 5 , the cantilever 111 is provided with a reinforcing rib 1111 extending from the end of the cantilever 111 connected with the middle frame 1 in a direction away from the light guide plate 2, and the reinforcing rib 1111 is fixedly connected with the middle frame 1. Specifically, the end of the cantilever 111 fixedly connected with the middle frame 1 is provided with a reinforcing rib 1111 for strengthening the structural strength of the cantilever 111 fixedly connected with the middle frame 1, so as to avoid damage to the cantilever 111 when subjected to a larger force. The reinforcing rib 1111 is fixedly arranged at the end of the cantilever 111 connected with the middle frame 1 and extends in a direction away from the light guide plate 2, i.e., the extension direction of the reinforcing rib 1111 is consistent with the direction (X-axis direction) of the light guide plate 2 when expanding toward the baffle 11. The reinforcing rib 1111 is fixedly connected with the middle frame 1, and the end of the reinforcing rib 1111 fixedly connected with the middle frame 1 is in a horizontal structure, so as to facilitate the fixed connection of the reinforcing rib 1111 with the middle frame 1. Therefore, the reinforcing rib 1111 enlarges the fixed connection range of the cantilever 111 with the middle frame 1, so as to further improve the connection strength of the cantilever 111 with the middle frame 1, thereby improving the durability of the baffle 11. Meanwhile, the reinforcing rib 1111 has a certain thickness and is located in the direction in which the cantilever 111 is compressed when the light guide plate 2 expands, so as to improve the structural strength and rigidity of the cantilever 111, thereby avoiding damage to the cantilever 111 and improving the service life of the baffle 11.
[0038] More specifically, as shown in Figure 3 , the reinforcing rib 1111 has a triangular structure, thereby further improving the structural strength of the cantilever 111.
[0039] In an embodiment, as shown in Figure 3 and Figure 5As shown, the side of the abutting portion 112 abutting with the light guide plate 2 is provided with a plurality of ribs 1121, which are arranged along the length direction of the abutting portion 112, and the ribs 1121 abut with the side wall reflection strips 21 of the light guide plate 2. Specifically, the side of the abutting portion 112 abuts with the light guide plate 2, thereby buffering and damping the light guide plate 2; the side of the abutting portion 112 abutting with the light guide plate 2 is provided with a plurality of ribs 1121, which are arranged along the length direction of the abutting portion 112, and the plurality of ribs 1121 are in an array structure, the ribs 1121 protrude from the surface of the abutting portion 112, and the ribs 1121 extend along the width direction of the abutting portion 112; the side wall of the side of the light guide plate 2 abutting with the baffle 11 is provided with a side wall reflection strip 21, which is used to improve the light utilization rate and uniformity, therefore, when the baffle 11 abuts with the light guide plate 2, the side wall reflection strip 21 abuts with the abutting portion 112, the outside of the side wall reflection strip 21 has a small contact area with the plurality of ribs 1121, thereby reducing the friction between the side wall reflection strip 21 and the abutting portion 112, avoiding the side wall reflection strip 21 of the light guide plate 2 from falling off, thereby improving the service life of the backlight module.
[0040] In specific embodiments, referring to Figure 5 As shown, the ribs 1121 are in a semi-cylindrical structure. Specifically, the ribs 1121 are arranged in a semi-cylindrical structure, when the ribs 1121 abut with the side wall reflection strip 21, the end point of the ribs 1121 contacts with the side wall reflection strip 21, at this time, the ribs 1121 and the side wall reflection strip 21 are in a point contact type, when the light guide plate 2 expands to generate a relative movement in the direction of the screen (Y-axis direction), due to the point contact type design, the friction between the baffle 11 and the side wall reflection strip 21 is small, thereby further avoiding the problem that the friction is greater than the adhesion of the side wall reflection strip 21, avoiding the side wall reflection strip 21 from falling off, and improving the service life of the backlight module.
[0041] In an embodiment, referring to Figure 4 As shown, the plurality of baffles 11 are respectively located on the left side, the right side and the top side of the middle frame 1. Specifically, the left side, the right side and the top side of the middle frame 1 are each provided with the baffle 11, and the left side, the right side and the top side of the middle frame 1 are each provided with two baffles 11, thereby enabling the baffle 11 to buffer and damp the left side, the right side and the top side of the light guide plate 2, and protecting the light guide plate 2 on the basis of reducing cost.
[0042] In specific embodiments, the baffle 11 is integrally injection molded with the middle frame 1 (not shown in the figure). Specifically, the baffle 11 and the middle frame 1 are integrally injection molded structures, thereby reducing production cost and improving production efficiency, without the need for other assembly operations; at the same time, the connection strength of the fixed connection of the baffle 11 and the middle frame 1 can be improved to improve the service life of the baffle 11.
[0043] More specifically, the middle frame 1 and the baffle 11 are both plastic structures, thereby improving the elasticity of the baffle 11 to better protect the light guide plate 2.
[0044] The present application also provides a display device (not shown in the figure), which comprises a backlight module, and the backlight module is any one of the backlight modules described above. Since the backlight module is described in detail in the above embodiments, no further description will be given here
[0045] The display device of the present application can reduce the emission of chemical auxiliaries during production, avoid pollution to the environment, and reduce production cost, while having high production efficiency, because the backlight module is used. Therefore, the display device can reduce pollution to the environment during the production process, while also reducing production cost and improving production efficiency.
[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A backlight module, characterized in that, Comprising: A middle frame, a plurality of elastic flaps are arranged along the circumference of the middle frame, one end of the flaps is fixedly connected with one side of the middle frame, and the other end is suspended into the loading space enclosed by the middle frame; A light guide plate is fixedly arranged in the loading space, and the outer side of the light guide plate abuts against one side of the flaps.
2. The backlight module of claim 1, wherein, The flaps comprise a cantilever and an abutting portion, one end of the cantilever is fixedly connected with the middle frame, the other end extends towards the light guide plate and is connected with the abutting portion, and one side of the abutting portion abuts against the outer side of the light guide plate.
3. The backlight module of claim 2, wherein, The cantilever is in an inclined structure, and extends from the end connected with the middle frame towards the light guide plate.
4. The backlight module of claim 3, wherein, The inclination angle of the cantilever is 3°-5°.
5. The backlight module of claim 2, wherein, The cantilever is provided with a reinforcing rib, the reinforcing rib extends from the end of the cantilever connected with the middle frame away from the light guide plate, and the reinforcing rib is fixedly connected with the middle frame.
6. The backlight module of claim 2, wherein, The side of the abutting portion abutting against the light guide plate is provided with a plurality of ribs, the plurality of ribs are arranged along the length direction of the abutting portion, and the ribs abut against the side wall reflection strips of the light guide plate.
7. The backlight module of claim 6, wherein, The ribs are in a semi-cylindrical structure.
8. The backlight module of claim 1, wherein, The plurality of flaps are respectively arranged on the left side, the right side and the top side of the middle frame.
9. The backlight module of claim 1, wherein, The flaps and the middle frame are integrally injection molded.
10. A display device, characterized by Comprising: A backlight module, the backlight module is any one of the backlight modules according to claims 1-9.