Light guide plate for panel lamp and panel lamp
By increasing the density of light scattering points on the rounded segments of the light guide panel, the issue of uneven light distribution in flat panel lights is addressed, achieving improved uniformity and brightness consistency.
Patent Information
- Application Number
- CN202422229561.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-11
AI Technical Summary
During the working process of the flat lamp, the superposition of light beams at the rounded corners leads to uneven light.
At the rounded corners of the light guide plate, the density of the second light guide dot is larger than the first light guide dot at the plane. By increasing the density of the dots at the rounded corners, the scattering effect is enhanced to ensure uniform distribution of the light beam.
The light uniformity of the flat lamp is improved, and the light intensity at the rounded corners is avoided, thereby achieving the uniformity of the overall light.
Smart Images
Figure CN223108107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lighting fixtures, and more specifically, to a light guide plate and a flat panel lamp for a flat panel lamp. Background Art
[0002] During the operation of a flat panel lamp, lamp beads are usually arranged around the outer side of the light guide plate to form all-round light input. However, at the rounded corners of the light guide plate, due to the superposition of light beams generated by the illuminating lamp beads, a strong light is formed at the rounded corners, which is significantly higher than the side position, thus resulting in the problem of uneven light output. Summary of the Utility Model
[0003] The utility model provides a light guide plate and a flat panel lamp for a flat panel lamp, which improve the light scattering effect on the light beam by making the dot density on the rounded corner light guide section larger, thereby improving the light output uniformity.
[0004] Embodiments of the utility model can be implemented as follows:
[0005] An embodiment of the utility model provides a light guide plate for a flat panel lamp, which includes:
[0006] A connected planar light guide section and a rounded corner light guide section;
[0007] Wherein, the planar light guide section is densely provided with first light guide dots, the rounded corner light guide section is densely provided with second light guide dots, and the arrangement density of the first light guide dots is less than the arrangement density of the second light guide dots.
[0008] Optionally, the arrangement density of the first light guide dots is a, and the arrangement density of the second light guide dots is b, where 10a ≤ b ≤ 20a.
[0009] Optionally, the arrangement density of the second light guide dots is b, where 100 dots / mm 2 ≤ b ≤ 200 dots / mm 2 .
[0010] Optionally, the distance between two adjacent second light guide dots is d, where 0.05 mm ≤ d ≤ 0.1 mm.
[0011] Optionally, the arrangement density of the first light guide dots is a, where 10 dots / mm 2 ≤ a ≤ 20 dots / mm 2 .
[0012] Optionally, the distance between two adjacent first light guide dots is c, where 0.1 mm ≤ c ≤ 0.3 mm.
[0013] Optionally, the arrangement density of the second light guide dots is positively correlated with the size of the rounded corners of the rounded corner light guide section.
[0014] Optionally, the variation ratio of the arrangement density of the second light guide dot array is the same as the variation ratio of the fillet size of the fillet light guide section.
[0015] An embodiment of the present invention further provides a flat panel lamp, including:
[0016] A frame, lamp beads, a diffusion plate, and the light guide plate for the flat panel lamp as described above;
[0017] Wherein, the lamp beads and the light guide plate for the flat panel lamp are both accommodated in the frame, the lamp beads are located outside the planar light guide section and the fillet light guide section, the diffusion plate is located below the planar light guide section and the fillet light guide section, the lamp beads are used to generate light beams, and the light beams are scattered by the first light guide dot array and the second light guide dot array, and then emitted by the diffusion plate.
[0018] Optionally, the flat panel lamp further includes a reflector, and the reflector is located on a side of the light guide plate for the flat panel lamp away from the diffusion plate.
[0019] The beneficial effects of the light guide plate for the flat panel lamp and the flat panel lamp according to the embodiments of the present invention include, for example:
[0020] The light guide plate for the flat panel lamp includes a connected planar light guide section and a fillet light guide section; wherein, the first light guide dot array is densely arranged on the planar light guide section, the second light guide dot array is densely arranged on the fillet light guide section, and the arrangement density of the first light guide dot array is less than that of the second light guide dot array. In the working state, when the planar light guide section and the fillet light guide section receive omnidirectional light beams, the first light guide dot array and the second light guide dot array can scatter the light beams respectively. Because the density of the second light guide dot array is greater, a stronger scattering effect is generated at the fillet position, avoiding excessive luminous intensity at the fillet position, and thus making the overall light emission more uniform.
[0021] The flat panel lamp includes a light guide plate for the flat panel lamp, which has all the functions of the light guide plate for the flat panel lamp. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0023] Figure 1 It is a schematic structural diagram of the light guide plate for the flat panel lamp provided in the embodiment of the present invention;
[0024] Figure 2 The cross-sectional schematic diagram of the flat lamp provided in the embodiment of the present utility model;
[0025] Figure 3 The working schematic diagram of the flat lamp provided in the embodiment of the present utility model.
[0026] Icon: 100 - light guide plate for the flat lamp; 110 - planar light guide section; 111 - first light guide dot; 120 - rounded light guide section; 121 - second light guide dot; 200 - frame; 300 - lamp beads; 400 - diffusion plate; 500 - reflector; 1000 - flat lamp. Detailed implementation manners
[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0029] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0030] In the description of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.
[0031] In addition, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.
[0032] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.
[0033] Unless otherwise expressly stipulated and defined, terms such as "arranged" and "connected" shall be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances.
[0034] It should be noted that, without conflict, the features in the embodiments of the present utility model may be combined with each other.
[0035] Please refer to Figures 1 - 3 , the light guide plate 100 and the flat panel lamp 1000 provided in the embodiments of the present utility model can solve the above problems, and the following will describe them in detail.
[0036] Refer to Figure 1 , the light guide plate 100 for a flat panel lamp includes a connected planar light guide section 110 and a rounded-corner light guide section 120; wherein, first light guide dots 111 are densely arranged on the planar light guide section 110, second light guide dots 121 are densely arranged on the rounded-corner light guide section 120, and the arrangement density of the first light guide dots 111 is less than the arrangement density of the second light guide dots 121.
[0037] In the working state, when the planar light guide section 110 and the rounded-corner light guide section 120 receive a full-week light beam, the first light guide dots 111 and the second light guide dots 121 can scatter the light beam respectively. Because the density of the second light guide dots 121 is greater, a stronger scattering effect is generated at the rounded-corner position, avoiding too high luminous intensity at the rounded-corner position, and thus making the overall light output more uniform.
[0038] It should be noted that the light guide plate is usually a rectangular plate-like structure, and the four corners of the rectangle are respectively rounded to form the rounded-corner light guide section 120, and the four sides of the rectangle form the planar light guide section 110. In the flat panel lamp 1000, the lamp beads 300 are arranged around the light guide plate 100 for a flat panel lamp, and thus the light guide effect can be achieved through the planar light guide section 110 and the rounded-corner light guide section 120.
[0039] Furthermore, densely arranged means that there are dozens, hundreds, or more than thousands of dots corresponding to a single area. That is, dozens, hundreds, or more than thousands of first light guide dots 111 and second light guide dots 121 are respectively arranged in the single planar light guide section 110 and the rounded light guide section 120.
[0040] It should be noted that the first light guide dots 111 and the second light guide dots 121 are respectively formed on the top surface of the light guide plate 100 for the flat panel lamp, that is, the side facing away from the light-emitting side. Usually, a smaller groove is stamped on the top surface of the light guide plate 100 for the flat panel lamp by other tools. The groove located at the position of the rounded light guide section 120 is the second light guide dot 121, and the groove located at the position of the planar light guide section 110 is the first light guide dot 111. That is, the difference between the first light guide dot 111 and the second light guide dot 121 lies in their different positions, and their specific forming parameters are theoretically the same. Of course, in order to highlight the independence of different dots, the forming parameters of the first light guide dot 111 and the second light guide dot 121 can also be made different.
[0041] Of course, in other embodiments of the present invention, the light guide plate 100 for the flat panel lamp can also be in a polygonal structure such as a triangle or a pentagon. A rounded light guide section 120 can be formed by rounding the corners, and the specific shape of the light guide plate 100 for the flat panel lamp is not limited.
[0042] Reference Figure 1 To fully ensure the light-emitting uniformity, the arrangement density of the first light guide dots 111 can be a, and the arrangement density of the second light guide dots 121 can be b, where 10a ≤ b ≤ 20a.
[0043] Through analysis and experimental verification, when the condition of 10a ≤ b ≤ 20a is met, the technical effects of eliminating the superposition of strong light and avoiding too much light leakage can be achieved, thereby fully ensuring the light-emitting uniformity. Of course, b = 10a, or b = 11a, or b = 12a, or b = 13a, or b = 14a, or b = 15a, or b = 16a, or b = 17a, or b = 18a, or b = 19a, or b = 20a, etc. The specific ratio relationship between b and a is not limited. Preferably, b = 15a.
[0044] Furthermore, in order to make the light-emitting intensity sufficient, the specific arrangement density of the second light guide dots 121 can be limited to ensure the sufficient light emission of the rounded light guide section 120, where 100 dots / mm 2 ≤ b ≤ 200 dots / mm 2 .
[0045] Of course, b = 110 dots / mm 2, or b = 120 dots / mm 2 , or b = 130 dots / mm 2 , or b = 140 dots / mm 2 , or b = 150 dots / mm 2 , or b = 160 dots / mm 2 , or b = 170 dots / mm 2 , or b = 180 dots / mm 2 , or b = 190 dots / mm 2 , or b = 200 dots / mm 2 etc., the specific density of b is not limited. Preferably, b = 150 dots / mm 2 .
[0046] Similarly, the arrangement density of the first light guide dots 111 can be limited to ensure sufficient light output of the planar light guide section 110, where, 10 dots / mm 2 ≤a≤20 dots / mm 2 .
[0047] Of course, a = 10 dots / mm 2 or a = 11 dots / mm 2 or a = 12 dots / mm 2 or a = 13 dots / mm 2 or a = 14 dots / mm 2 or a = 15 dots / mm 2 or a = 16 dots / mm 2 or a = 17 dots / mm 2 or a = 18 dots / mm 2 or a = 19 dots / mm 2 or a = 20 dots / mm 2 etc., the specific density of a is not limited. Preferably, a = 15 dots / mm 2 .
[0048] It should be noted that in addition to limiting the arrangement density of the first light guide dots 111 and the second light guide dots 121, the distance between two adjacent first light guide dots 111, or two adjacent second light guide dots 121 can also be limited to achieve a better light output effect.
[0049] Specifically, the distance between two adjacent first light guide dots 111 can be c, where, 0.1mm≤c≤0.3mm; the distance between two adjacent second light guide dots 121 can also be d, where, 0.05mm≤d≤0.1mm.
[0050] In this embodiment, it is possible to define c = 0.2 mm and d = 0.075 mm to obtain better lighting conditions while satisfying the light output uniformity.
[0051] Of course, in other embodiments of the present invention, c can be 0.1 mm, or c = 0.12 mm, or c = 0.14 mm, or c = 0.16 mm, or c = 0.18 mm, or c = 0.2 mm, or c = 0.22 mm, or c = 0.24 mm, or c = 0.26 mm, or c = 0.28 mm, or c = 0.3 mm, etc. The specific size of c is not limited.
[0052] Similarly, in other embodiments of the present invention, d can be 0.05 mm, or d = 0.06 mm, or d = 0.07 mm, or d = 0.08 mm, or d = 0.09 mm, or d = 0.1 mm, etc. The specific size of d is not limited.
[0053] Reference Figure 1 , when manufacturing light guide plates 100 for flat panel lights of different specifications, their specification sizes, the sizes of the corresponding lamp beads 300, and the densities of the arranged first light guide dots 111 and second light guide dots 121 will all change adaptively.
[0054] Through analysis and experimental verification, it can be concluded that the arrangement density of the second light guide dots 121 is positively correlated with the fillet size of the fillet light guide section 120. That is, when the fillet of the fillet light guide section 120 becomes smaller, the density of the corresponding second light guide dots 121 should become smaller; when the fillet of the fillet light guide section 120 becomes larger, the density of the corresponding second light guide dots 121 should become larger; by making the two change in a positive correlation, it can be ensured that the light output uniformity will not be negatively affected when the size specifications change, which helps to manufacture light guide plates 100 for flat panel lights of different specifications.
[0055] Specifically, in order to make it more convenient to manufacture light guide plates 100 for flat panel lights of different specifications, the change ratio relationship between the arrangement density of the second light guide dots 121 and the fillet size of the fillet light guide section 120 can be further determined. Through detailed analysis and a large number of experimental verifications, the change ratio of the arrangement density of the second light guide dots 121 is the same as the change ratio of the fillet size of the fillet light guide section 120.
[0056] That is to say, when the rounded corner size of the rounded corner light guide section 120 increases by 10%, the density of the corresponding second light guide dot 121 will also increase by 10%; when the rounded corner size of the rounded corner light guide section 120 decreases by 10%, the density of the corresponding second light guide dot 121 will also decrease by 10%. Similarly, when the change ratio of the rounded corner size of the rounded corner light guide section 120 is 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, the change ratio of the arrangement density of the corresponding second light guide dot 121 also remains the same.
[0057] Reference Figure 2 and Figure 3 Moreover, an embodiment of the present invention further provides a flat panel lamp 1000, including: a frame 200, lamp beads 300, a diffusion plate 400, and a light guide plate 100 for the flat panel lamp; wherein, the lamp beads 300 and the light guide plate 100 for the flat panel lamp are both accommodated in the frame 200, the lamp beads 300 are located outside the planar light guide section 110 and the rounded corner light guide section 120, the diffusion plate 400 is located below the planar light guide section 110 and the rounded corner light guide section 120, and the lamp beads 300 are used to generate light beams, and the light beams are scattered by the first light guide dots 111 and the second light guide dots 121, and then emitted by the diffusion plate 400.
[0058] In addition, in order to improve the light output effect, the flat panel lamp 1000 may further include a reflector 500, and the reflector 500 is located on one side of the light guide plate 100 for the flat panel lamp away from the diffusion plate 400.
[0059] It should be noted that the reflector 500 may specifically be a reflector plate, and the reflector plate is in contact with one side of the light guide plate 100 for the flat panel lamp away from the diffusion plate 400; the reflector 500 may also be a reflective film, and the reflective film is laid on one side of the light guide plate 100 for the flat panel lamp away from the diffusion plate 400; the specific structural type of the reflector 500 is not limited.
[0060] In summary, the light guide plate 100 for the flat panel lamp and the flat panel lamp 1000 provided by the embodiments of the present invention at least have the following advantages:
[0061] (1) By arranging the second light guide dots 121 with a greater density than the first light guide dots 111 in the rounded corner light guide section 120, a stronger scattering effect is generated at the rounded corner position, avoiding excessive light emission intensity at the rounded corner position, and thus making the overall light output more uniform.
[0062] (2) By limiting the specific sizes, relative relationships, and the spacing between adjacent dots of the arrangement densities of the first light guide dots 111 and the second light guide dots 121, both the light output uniformity and the light output intensity are ensured simultaneously.
[0063] (3) By limiting the change ratio of the arrangement density of the second light guide dots 121 to be the same as the change ratio of the rounded corner size of the rounded light guide segment 120, it is convenient to produce light guide plates 100 for flat panel lights of different sizes, thereby improving the diversification of the flat panel lights 1000.
[0064] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A light guide plate for a flat panel lamp, characterized in that, Comprising: Connected planar light guide section (110) and rounded-corner light guide section (120); Wherein, on the planar light guide section (110), first light guide dots (111) are densely arranged, on the rounded-corner light guide section (120), second light guide dots (121) are densely arranged, and the arrangement density of the first light guide dots (111) is less than the arrangement density of the second light guide dots (121).
2. The light guide plate for a flat panel lamp according to claim 1, characterized in that, The arrangement density of the first light guide dots (111) is a, and the arrangement density of the second light guide dots (121) is b, where 10a ≤ b ≤ 20a.
3. The light guide plate for a flat panel lamp according to claim 1, characterized in that, The arrangement density of the second light guide dot (121) is b, where 100 dots / mm 2 ≤ b ≤ 200 dots / mm 2 .
4. The light guide plate for a flat panel lamp according to claim 1, characterized in that, The distance between two adjacent second light guide dots (121) is d, where 0.05 mm ≤ d ≤ 0.1 mm.
5. The light guide plate for a flat panel lamp according to claim 1, characterized in that, The arrangement density of the first light guide dot (111) is a, where 10 dots / mm 2 ≤ a ≤ 20 dots / mm 2 .
6. The light guide plate for a flat panel lamp according to claim 1, characterized in that, The distance between two adjacent first light guide dots (111) is c, where 0.1 mm ≤ c ≤ 0.3 mm.
7. The light guide plate for a flat panel lamp according to any one of claims 1-6, characterized in that, The arrangement density of the second light guide dots (121) is positively correlated with the rounded-corner size of the rounded-corner light guide section (120).
8. The light guide plate for a flat panel lamp according to claim 7, characterized in that, The change ratio of the arrangement density of the second light guide dots (121) is the same as the change ratio of the rounded-corner size of the rounded-corner light guide section (120).
9. A flat panel lamp, characterized in that, Comprising: A frame (200), lamp beads (300), a diffusion plate (400), and a light guide plate for a flat panel lamp according to any one of claims 1 - 8; Wherein, the lamp beads (300) and the light guide plate for the flat panel lamp are both accommodated in the frame (200), the lamp beads (300) are located outside the planar light guide section (110) and the rounded-corner light guide section (120), the diffusion plate (400) is located below the planar light guide section (110) and the rounded-corner light guide section (120), the lamp beads (300) are used to generate light beams, the light beams are scattered by the first light guide dots (111) and the second light guide dots (121), and then emitted by the diffusion plate (400).
10. The flat panel lamp according to claim 9, wherein, The flat panel lamp further includes a reflector (500), and the reflector (500) is located on the side of the light guide plate for the flat panel lamp away from the diffusion plate (400).