A large beam angle low glare LED lamp

Abstract

This invention provides a large beam angle, low glare LED lamp, comprising a lamp body and a reflector. The lamp body has an arc-shaped light-emitting surface. The reflector is mounted within the lamp body, with its lower edge connected to the upper edge of the arc-shaped light-emitting surface. The lower edge diameter of the reflector is A, the lower edge diameter of the arc-shaped light-emitting surface is B, the curvature of the arc-shaped light-emitting surface is sd2, and the lamp's shielding angle is α, where 0.6 ≦ A / B ≦ 0.620, 0.45 ≦ sd2 ≦ 0.55, and α > 22°. The LED lamp provided by this invention employs a novel light emission mode, controlling the ratios between various components to achieve high luminous efficiency, a large beam angle, and low glare value within the same light-emitting area.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, specifically to a large beam angle, low glare LED lamp. Background Technology

[0002] Downlights are a type of lighting fixture that is embedded in the ceiling and emits light downwards. They are commonly used in homes, offices, entertainment venues, etc., and serve as the main indoor lighting equipment.

[0003] The relationship between glare values: Under the same conditions, the larger the luminous surface, the smaller the glare value; the smaller the diffused light value, the smaller the glare value; the larger the luminaire's shielding angle, the smaller the glare value; and the larger the beam angle, the larger the glare value. Currently, the biggest technical challenge is how to reduce the diffused light value while maintaining a large beam angle. Currently, downlights on the market use large-area diffusers or simple high-brightness aluminum reflectors for light emission. There is no technology that can achieve a glare value below 19. Beam angles with glare values ​​below 19 on the market are all less than 45°. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a large beam angle, low glare LED lamp. It adopts a new light emission mode and controls the ratio between various components, achieving high luminous efficiency, a large beam angle, and low glare value under the same luminous area.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A large beam angle, low glare LED light includes:

[0007] The lamp body has an arc-shaped light-emitting surface inside.

[0008] A reflector cup is installed inside the lamp body, and the lower edge of the reflector cup is connected to the upper edge of the arc-shaped light-emitting surface;

[0009] The lower edge diameter of the reflector cup is A, the lower edge diameter of the arc-shaped light-emitting surface is B, the curvature value of the arc-shaped light-emitting surface is sd2, and the shielding angle of the downlight is a, wherein 0.6≦A / B≦0.620, 0.45≦sd2≦0.55, and a>22°.

[0010] In some embodiments, the ratio A / B of the lower edge diameter of the reflector cup to the lower edge diameter of the arc-shaped light-emitting surface is 0.618.

[0011] In some embodiments, the curvature value of the arc-shaped light-emitting surface is sd2 = 0.5.

[0012] In some embodiments, the height of the reflector cup is C, where 0.4 ≤ C / A ≤ 0.8.

[0013] In some embodiments, the ratio of the height of the reflector to the diameter of its lower edge, C / A, is 0.6.

[0014] In some embodiments, the reflector cup has a concave, scale-like arcuate surface.

[0015] In some embodiments, the lamp may further include a lighting component and a power supply component, both of which are installed in the lamp body. The lighting component is electrically connected to the power supply component, and the light emitted by the lighting component is diffused and emitted through the reflector and the arc-shaped light-emitting surface.

[0016] In some embodiments, a mounting bracket is also included, which is disposed above the lamp body.

[0017] The beneficial effects of the large beam angle low glare LED lamp provided by this invention are as follows: by designing the dimensions of each component, including the lower edge diameter of the reflector cup, the lower edge diameter of the arc-shaped light-emitting surface, the ratio between the two, the ratio of the height of the reflector cup to the lower edge diameter of the reflector cup, and setting the curvature value of the arc-shaped light-emitting surface and the shielding angle of the downlight, it is achieved that the beam angle is greater than 60° while the glare value is below 19. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the shielding angle of the present invention;

[0020] Figure 3 This is a schematic diagram of the reflector cup structure of the present invention;

[0021] Figure 4 This is a schematic diagram showing the height and lower edge diameter of the reflector cup of the present invention.

[0022] In the picture: 1. Lamp body; 101. Curved light-emitting surface; 2. Reflector. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0024] Technical Terminology Explanation: Uniform Glare Rating (UGR): This is a psychological parameter used to measure the subjective discomfort caused to the human eye by light emitted from lighting fixtures in an indoor visual environment. Its value can be calculated using the CIE uniform glare value formula under specified conditions, with values ​​ranging from 13 to 28. Higher values ​​indicate greater discomfort to the human eye. A UGR of 25 or higher already causes discomfort. The relevant international standard is CIE 117-1995, and the national standard is GB 50034-2013. With the improvement of people's living standards, the requirements for glare values ​​are also increasing; currently, the requirement for lighting fixtures is a glare value below 19 (UGR < 19).

[0025] Luminous shielding angle: refers to the angle between the horizontal line passing through the center of the light source and the first line of naked light visible to the human eye.

[0026] Beam angle: The beam angle refers to the angle between 1 / 10 of the maximum luminous intensity of a luminaire. It is used to describe the type of floodlight. The beam angle is reflected on the illuminated wall surface as the size of the light spot; the larger the beam angle, the larger the light spot and the wider the illuminated area. To reduce the number of luminaires used in a building, the beam angle of the luminaires is required to be >60°.

[0027] Example: A large beam angle, low glare LED lamp.

[0028] A large beam angle low glare LED light includes a lamp body 1 and a reflector 2. The lamp body 1 has an arc-shaped light-emitting surface 101. The reflector 2 is installed inside the lamp body 1, and the lower edge of the reflector 2 is connected to the upper edge of the arc-shaped light-emitting surface 101. The lower edge diameter of the reflector 2 is A, the lower edge diameter of the arc-shaped light-emitting surface 101 is B, the curvature value of the arc-shaped light-emitting surface 101 is sd2, and the shielding angle of the downlight is α, wherein 0.6≦A / B≦0.620, 0.45≦sd2≦0.55, and α>22°.

[0029] Based on the above scheme, the larger the arc-shaped luminous surface 101, the lower the glare value; the smaller the astigmatism value, the lower the glare value; and the larger the luminaire's shielding angle, the lower the glare value. Dimension B controls the size of the arc-shaped luminous surface 101. For luminaires of the same size, maximizing dimension B results in smaller astigmatism and glare values. The astigmatism value is related to dimension A, the curvature of the arc-shaped luminous surface 101, and the shielding angle α. When the A / B value is between 0.6 and 0.620, the curvature of the arc-shaped luminous surface 101 is between 0.45 and 0.55, and the shielding angle α > 22°, the luminaire has a smaller astigmatism and glare value.

[0030] In some embodiments, the ratio A / B of the lower edge diameter of the reflector cup 2 to the lower edge diameter of the arc-shaped light-emitting surface 101 is 0.618.

[0031] In some embodiments, the curvature value sd2 of the arc-shaped light-emitting surface 101 is 0.5.

[0032] In some embodiments, the height of the reflector cup 2 is C, where 0.4 ≤ C / A ≤ 0.8.

[0033] In some embodiments, the ratio of the height of the reflector cup 2 to the diameter of its lower edge is C / A = 0.6.

[0034] Based on the above scheme, corresponding experimental verification was carried out.

[0035] Experiments were conducted with the curvature of the arc-shaped luminous surface 101, the angle of the shading angle, the height of the reflector 2, and the ratio of the lower edge diameter of the reflector 2 fixed, while other conditions remained the same.

[0036] Example 1: A / B = 0.618, sd2 = 0.5, a > 22°, C / A = 0.6. The parameters set in this example are the optimal implementation method of this application.

[0037] Example 2: A / B = 0.5, sd2 = 0.5, a > 22°, C / A = 0.6;

[0038] Example 3: A / B = 0.7, sd2 = 0.5, a > 22°, C / A = 0.6;

[0039] Of the three schemes mentioned above, the tested data showed that the beam angle of Example 1 was 60°, and the glare value was between 13.6 and 13.9; the beam angle of Example 2 was 54°, and the glare value was between 16.7 and 16.9; and the beam angle of Example 3 was 61°, and the glare value was between 15.6 and 16.0. This comparison shows that Example 1 achieved the best test results with the parameter settings. The beam angle meets the current lighting requirements for downlights, and the glare value is the lowest, resulting in better user comfort. It also further verifies that the ratio of the lower edge diameter of the reflector to the lower edge diameter of the arc-shaped light-emitting surface has a significant impact on the beam angle and glare value.

[0040] With the ratio of the lower edge diameter of the reflector 2 to the lower edge diameter of the arc-shaped light-emitting surface 101, the angle of the shielding angle, the height of the reflector 2, and the ratio of the lower edge diameter of the reflector 2 fixed, a supplementary comparative experiment was conducted to verify this under the same conditions:

[0041] Example 4: A / B = 0.618, sd2 = 0.3, a > 22°, C / A = 0.6;

[0042] Example 5: A / B = 0.618, sd2 = 0.4, a > 22°, C / A = 0.6;

[0043] Example 6: A / B = 0.618, sd2 = 0.8, a > 22°, C / A = 0.6;

[0044] Example 7: A / B = 0.618, sd2 = 0.9, a > 22°, C / A = 0.6;

[0045] Of the four schemes mentioned above, the tested data are as follows: Example 4 has a beam angle of 55° and a glare value between 18.9 and 19.5; Example 5 has a beam angle of 54° and a glare value between 17.8 and 18.5; Example 6 has a beam angle of 54° and a glare value between 17.5 and 18.2; and Example 7 has a beam angle of 55° and a glare value between 19.5 and 19.8. This comparison shows that the test data for Examples 4 to 7 are all worse than those for Example 1, and also verifies that the curvature of the arc-shaped emitting surface has a significant impact on the beam angle and glare value.

[0046] With the ratio of the lower edge diameter of the reflector 2 to the lower edge diameter of the arc-shaped light-emitting surface 101, the curvature value of the arc-shaped light-emitting surface 101, and the angle of the shading angle fixed, a supplementary comparative experiment was conducted to verify this under the same conditions:

[0047] Example 8: A / B = 0.618, sd2 = 0.9, a > 22°, C / A = 0.4;

[0048] Example 9: A / B = 0.618, sd2 = 0.9, a > 22°, C / A = 0.8;

[0049] Example 10: A / B = 0.618, sd2 = 0.9, a > 22°, C / A = 1.1;

[0050] Of the three schemes mentioned above, the tested data showed that the beam angle of Example 8 was 52° and the glare value was between 19.9 and 22.2; the beam angle of Example 2 was 54° and the glare value was between 18.9 and 19.3; and the beam angle of Example 3 was 55° and the glare value was between 20.5 and 21.0. This verifies that the height of the reflector and the ratio of the lower edge diameter of the reflector have a significant impact on the beam angle and glare value.

[0051] Finally, supplement the test data of the prior art, Example 11: A / B = 0.8, sd2 = 0.7, a > 15°, C / A = 0.9; the data tested in this example is a beam angle of 58° and a glare value between 25.6 and 28.7. It can be seen from this comparison that the test data is the worst when the parameter settings are different from the optimal settings of this application.

[0052] In some embodiments, the reflector cup 2 has a concave, scale-like arc surface. Conventional reflectors used to control the beam angle mostly employ an outwardly concave, scale-like arc surface design, which has the disadvantage of uneven light spot and high astigmatism. However, the reflector cup 2 in this application adopts a concave, scale-like arc surface design, which maximizes the beam angle while ensuring a uniform light spot, reducing astigmatism and lowering glare.

[0053] In some embodiments, the system further includes a lighting component and a power supply component, both of which are installed inside the lamp body 1. The lighting component is electrically connected to the power supply component, and the light emitted by the lighting component is diffused and emitted through the reflector cup 2 and the arc-shaped light-emitting surface 101.

[0054] In some embodiments, a mounting bracket is also included, which is disposed above the lamp body 1.

[0055] In summary, this device maximizes the size of the light-emitting surface by controlling the parameters and ratios between various components, while ensuring a sufficiently large beam angle to meet lighting requirements and achieving a low glare value to improve user comfort.

[0056] The above description is only a preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in the embodiments and drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A large beam angle, low glare LED lamp, characterized in that... ,include: The lamp body has an arc-shaped light-emitting surface inside. A reflector cup is installed inside the lamp body, and the lower edge of the reflector cup is connected to the upper edge of the arc-shaped light-emitting surface; The lower edge diameter of the reflector cup is A, the lower edge diameter of the arc-shaped light-emitting surface is B, the curvature value of the arc-shaped light-emitting surface is sd2, and the shielding angle of the lamp body is a, wherein 0.6≦A / B≦0.620, 0.45≦sd2≦0.55, and a>22°.

2. The large beam angle low glare LED lamp as described in claim 1, characterized in that, The ratio of the lower edge diameter of the reflector cup to the lower edge diameter of the arc-shaped light-emitting surface is A / B = 0.

618.

3. The large beam angle low glare LED lamp as described in claim 2, characterized in that, The curvature value of the arc-shaped luminous surface is sd2=0.

5.

4. The large beam angle low glare LED lamp as described in any one of claims 1-3, characterized in that, The height of the reflector cup is C, where 0.4≦C / A≦0.

8.

5. The large beam angle low glare LED lamp as described in claim 4, characterized in that, The ratio of the height of the reflector to the diameter of its lower edge is C / A = 0.

6.

6. The large beam angle low glare LED lamp as described in claim 1, characterized in that, The reflector cup has a concave, scale-like arc-shaped surface.

7. The large beam angle low glare LED lamp as described in claim 1, characterized in that, It also includes a lighting component and a power supply component, both of which are installed in the lamp body. The lighting component is electrically connected to the power supply component, and the light emitted by the lighting component is diffused and emitted through the reflector and the arc-shaped light-emitting surface.

8. The large beam angle low glare LED lamp as described in claim 1, characterized in that, It also includes a mounting bracket, which is disposed above the lamp body.

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