Light source light color detection system and light color comparison method

Abstract

The application provides a light color detection system of a light emitting source and a light color comparison method, wherein the light color detection system of the light emitting source comprises a test platform, a hollow support frame arranged on the test platform, a light transmission plane medium horizontally arranged on the support frame and used for performing diffuse transmission on light emitted by a light emitting source to be detected, the light transmission plane medium is prepared from a non-transparent pure color substance, the light emitting source to be detected is arranged at the same height below the light transmission plane medium in the hollow part of the support frame during detection, and a detection power supply is arranged on the test platform and connected with the light emitting source to be detected and used for supplying power for the light emitting source to be detected, so that the technical problems of low accuracy and high requirement on external environment of the existing light color comparison method are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of semiconductor technology, and in particular to a light source color detection system and a color comparison method. Background Technology

[0002] Whether used in commercial lighting, mobile phone flashlights, automotive headlights, or other fields, end customers evaluate the color of light (emitted light) and its lighting effect when selecting a light source. Furthermore, a single customer typically has more than one supplier, often involving two or three suppliers, necessitating a comparison of the color of light from different suppliers. Even with light sources from the same supplier, comparisons of the color of light from different sources may be necessary in certain situations.

[0003] Detecting the color of light from a source using specialized instruments is extremely expensive. Therefore, in most scenarios where high precision is not required, a simpler method is employed. This involves simultaneously illuminating multiple light sources with the same current and voltage in a dark environment, projecting the light onto a wall, and then observing the color of the emitted light with the naked eye. While this method achieves the desired result to some extent, it has the following drawbacks:

[0004] 1. The large halo of light projected onto the wall, with blurred edges, results in weak color saturation, making subtle color differences easily overlooked. Prolonged observation can cause visual fatigue. Figure 1 As shown, (a) and (b) are the apertures formed on the wall when the light source is transmitted from two different angles.

[0005] 2. To improve the accuracy of the judgment, the external environment needs to be kept as dark as possible, which places high demands on the external environment.

[0006] 3. Various tools are needed to make it emit light, such as lamps, light tubes, power supplies, etc., and a wall with a large space is required, which is common sense. The space requirements are relatively high.

[0007] 4. Aperture patterns on walls generally lack a fixed shape, and the light is quite diffused, making it difficult to observe subtle differences in color between light sources. Even if the aperture pattern projected onto the wall is photographed and the RGB values ​​at various locations are calculated, factors such as hand tremors, transmission angles, and transmission distances will cause differences in the aperture patterns transmitted from different light sources onto the wall. Therefore, it is difficult to determine the same location for color comparison from the aperture patterns of different light sources, and consequently, it is impossible to compare specific RGB values. Summary of the Invention

[0008] To overcome the above shortcomings, this invention provides a light source color detection system and a light color comparison method, which effectively solves the technical problems of low accuracy and high requirements for external environment in existing light color comparison methods.

[0009] The technical solution provided by this invention is as follows:

[0010] On one hand, the present invention provides a light source color detection system, comprising:

[0011] Test platform;

[0012] A hollow support frame is placed on the test platform;

[0013] A light-transmitting planar medium is placed horizontally on the support frame to diffuse the light emitted from the light source to be tested. The light-transmitting planar medium is made of a non-transparent, pure-color material. During testing, the light source to be tested is placed at the same height below the light-transmitting planar medium in the hollow part of the support frame.

[0014] A test power supply is placed on the test platform and connected to the light source to be tested, used to supply power to the light source to be tested.

[0015] On the other hand, the present invention provides a method for comparing the color of a light source, applied to the aforementioned light source color detection system, wherein the method for comparing the color of a light source includes:

[0016] Provide multiple light sources for comparison;

[0017] Connect the plurality of light sources to be compared to the detection power supply and place them below the light transmission plane medium;

[0018] Light up the plurality of light sources to be compared;

[0019] The transmitted light, after diffuse transmission of the emitted light from the light source, is received on the upper surface of the light-transmitting plane medium.

[0020] The color of light from multiple light sources is compared based on the transmitted light from different light sources.

[0021] The light source color detection system and color comparison method provided by this invention diffuses the light emitted by the light source by placing a light-transmitting plane medium above a hollow support frame. The light color of the light source can be directly observed on the surface of the light-transmitting plane medium, which is convenient for human observation. The light aperture color is clear and has high color purity. During observation, the light-transmitting plane medium serves as the only common background for different light sources. Within a small area of ​​light emission, the contrast between light and dark is obvious, and the color saturation of the light source is high. Compared with traditional methods of observation through walls or other media, the contrast is high. It is not necessary to adjust the external environment to be as dark as possible to complete the comparison of light emission colors, which can greatly improve the detection efficiency, utilize less space, and is simple to operate. Attached Figure Description

[0022] Figure 1 This is a diagram of the aperture formed when light is projected onto a wall in existing technology;

[0023] Figure 2 This is a comparison of the light color of two light sources under a non-transparent white light transmission plane medium in an example.

[0024] Figure 3 This is a comparison of the light color of two light sources under a non-transparent blue light transmission plane medium in an example.

[0025] Figure 4 This is a schematic flowchart of an embodiment of the light source color comparison method of the present invention. Detailed Implementation

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0027] In one embodiment of the present invention, a light source color detection system includes: a test platform; a hollow support frame placed on the test platform; a light-transmitting plane medium placed horizontally on the support frame for diffuse transmission of light emitted from the light source to be tested, the light-transmitting plane medium being made of a non-transparent, pure-color material; during detection, the light source to be tested is positioned at the same height below the light-transmitting plane medium in the hollow portion of the support frame; and a detection power supply placed on the test platform and connected to the light source to be tested for supplying power to the light source to be tested.

[0028] In this embodiment, the test platform can be any plane, and the support frame can be any type of frame. There are no limitations on its specific structure or the materials used for its fabrication, as long as the light transmission plane medium is placed at the same horizontal height on the test platform and the support frame surface. In addition, there are no limitations on the size of the hollow space inside the support frame, as long as it can accommodate the light source to be tested and the light emitted from the light source placed in the hollow area can directly enter the light transmission plane medium.

[0029] A light-transmitting plane medium is a non-transparent, pure-colored plane that allows light to pass through, such as paper of a certain thickness, a frosted glass plate, or a frosted plastic plate. Theoretically, any color other than pure black or another color that would completely block light is acceptable. Experimental results also show that pure colors other than black can clearly distinguish light colors. The specific color chosen in application depends on the actual situation. For example, to detect the color of a single light source, a non-transparent white plane can be selected; in another example, to compare the colors of multiple light sources, a plane of a color other than black can be selected. For ease of observation, a non-transparent white plane can also be chosen. The thickness and material of the plane itself are not specifically limited here, as long as the plane can diffusely reflect incident light from its lower surface and project it onto its upper surface.

[0030] To further improve the light color detection effect, in another embodiment, the light color detection system for the light source also includes a light-blocking component that is hollow enough to house a light source to be detected, positioned below the light-transmitting plane medium. This light-blocking component is used to surround the light source, reflecting the light emitted by the light source in all directions back towards the light-transmitting plane medium. Therefore, any structure that can achieve this purpose is included in the scope of this embodiment, such as a hollow cylindrical tube or square tube. Theoretically, any formable material can be used for the light-blocking component, such as metal or plastic. For applications requiring high light intensity, in addition to using materials with high light reflectivity to fabricate the light-blocking component, a light-reflective material can also be coated onto its surface to achieve the desired effect.

[0031] In another embodiment, in order to facilitate the adjustment of the distance between the light source to be tested and the light transmission plane medium and further improve the detection efficiency, the light source color detection system further includes a height adjustment device with a platform for placing the light source to be tested on its surface, which is located below the light transmission plane medium and is used to adjust the distance between the light source to be tested and the light transmission plane medium.

[0032] When performing colorimetric detection on a light source, firstly, multiple light sources to be compared are connected to the detection power supply and placed on a platform on the surface of an inner height adjustment device below the light transmission plane medium. The distance between the light source and the light transmission plane medium is adjusted using the height adjustment device. Next, the light source is connected to the detection power supply and turned on. Finally, the transmitted light, after diffuse transmission of the emitted light from the light source, is received on the upper surface of the light transmission plane medium. The colorimetric detection of the light source is completed by observing the transmitted light.

[0033] The distance between the light source to be tested and the light-transmitting plane medium ranges from 0 to 15 cm (the distance between the light-transmitting plane medium and the surface directly above the light source). This distance can be adjusted according to the brightness of the light source. For light sources with high brightness, the distance can be adjusted further; for light sources with low brightness, the distance can be adjusted closer, as long as it ensures that light is transmitted through the light-transmitting plane medium for easy observation. The specific form of the height adjustment device is not limited here; any device capable of adjusting the height in the vertical direction is acceptable, and internal adjustments can be made using components such as sliding rails or springs. Of course, in other embodiments, the height adjustment device can also be moved horizontally to adjust the light source to a suitable horizontal position.

[0034] In another embodiment, to further improve the accuracy of light color comparison, an imaging device and a light color detection device are further configured in the light source light color detection system. The imaging device is configured above the light transmission plane medium, and the imaging lens is set parallel to the light transmission plane medium for imaging the aperture pattern projected by the light source onto the light transmission plane medium. The light color detection device is used to detect the RGB values ​​at different positions on the aperture pattern captured by the imaging device.

[0035] In this embodiment, because the aperture image is diffusely reflected by the light-transmitting plane medium, the light color of the inner and outer rings in the aperture image is more uniform than that of the traditional method of directly transmitting light onto the wall (the center point of the aperture image directly transmitted onto the wall is generally white, which is significantly different from the outer ring light color). Moreover, the center position is no longer white, which facilitates the subsequent comparison of light colors between different light sources in the light color detection device. The RGB value at the center position can be directly selected for measurement and comparison to achieve the purpose of the invention.

[0036] The shooting device can be fixed above the light-transmitting plane medium in any way, such as a bracket, as long as it is on the same horizontal plane to shoot the aperture diagrams of different light sources. In practical applications, it can be shot using devices such as cameras, mobile phones, and tablets. No specific limitations are made here.

[0037] The light color detection device is a smart device such as a PC or mobile phone. It uses an RGB value detection application (such as image processing software like Photoshop) to detect the RGB values ​​at various points on the aperture diagram. When comparing the light colors of different light sources, it detects and compares the RGB values ​​at the same location on the aperture diagram for each light source (determined by the position of each point on the aperture diagram). For ease of operation, the RGB value at the center of the aperture diagram can be directly selected for detection.

[0038] In one example, the color comparison results of two light sources under a non-transparent white light transmission plane medium are as follows: Figure 2 As shown, the difference in light color between the two aperture images is clearly visible to the human eye during the experiment. The test results also verified this result. The RGB values ​​at the center of Image (a) (corresponding to the black dot in the image) were 215, 230, and 225, respectively; while the RGB values ​​at the center of Image (b) were 226, 242, and 229, respectively, showing a significant difference.

[0039] In one example, the color comparison results of two light sources under a non-transparent blue light projection plane medium are as follows: Figure 3 As shown, the human eye cannot clearly perceive the difference in light color between the two aperture diagrams during the experiment. Upon testing, the RGB values ​​at the center of Figure (a) (corresponding to the black dot in the diagram) were 199, 255, and 252, respectively; the RGB values ​​at the center of Figure (b) were 190, 254, and 253, respectively, indicating that the light colors of the two light sources were almost identical.

[0040] Another embodiment of the present invention provides a method for comparing the color of a light source, applied to the aforementioned light source color detection system, such as... Figure 4 As shown, the light color comparison method for this light source includes:

[0041] S10 provides multiple light sources for comparison;

[0042] S20 connects multiple light sources to be compared to the detection power supply and places them below the light transmission plane medium;

[0043] S30 illuminates multiple light sources to be compared;

[0044] S40 receives the transmitted light after the emitted light from the light source has been diffusely transmitted on the upper surface of the light-transmitting plane medium.

[0045] The S50 performs color comparison of multiple light sources based on the transmitted light from different light sources.

[0046] In this embodiment, when comparing the colors of multiple light sources, the multiple light sources are simultaneously lit below a light-transmitting plane medium. The purpose is achieved by observing the transmitted light diffusely transmitted from the upper surface of the light-transmitting plane medium. During this process, the multiple light sources must be lit under identical conditions (same current, same voltage, on the same horizontal plane, at the same distance from the light-transmitting plane medium, etc.), and the distance between the light sources should not be too far, with an interval between 0.5 and 5 cm. To further improve the comparison effect, in another embodiment, multiple light sources to be compared are connected to a detection power supply and placed below a light-transmitting plane medium. This includes connecting the multiple light sources to be compared to the detection power supply, placing them sequentially inside a hollow light-blocking component and below the light-transmitting plane medium, wherein the light sources and light-blocking components are configured in a one-to-one correspondence.

[0047] In this embodiment, the system is further configured with a light-blocking component that is hollow enough to house a light source to be detected, positioned below the light-transmitting plane medium. This light-blocking component is used to surround the light source, reflecting the light emitted by the light source in all directions back towards the light-transmitting plane medium. Therefore, any structure that can achieve this purpose is included within the scope of this embodiment.

[0048] To facilitate adjusting the distance between the light source to be tested and the light-transmitting plane medium and further improve detection efficiency, in another embodiment, multiple light sources to be compared are connected to the detection power supply and placed below the light-transmitting plane medium. This includes: connecting multiple light sources to be compared to the detection power supply and placing them on a platform on the surface of the inner height adjustment device below the light-transmitting plane medium; and adjusting the distance between the light source and the light-transmitting plane medium by the height adjustment device.

[0049] In this embodiment, the system further includes a height adjustment device with a surface configured to place a light source to be tested on a platform, which is located below the light transmission plane medium and is used to adjust the distance between the light source to be tested and the light transmission plane medium.

[0050] When performing colorimetric detection on a light source, firstly, multiple light sources to be compared are connected to the detection power supply and placed on a platform on the surface of an inner height adjustment device below the light transmission plane medium. The distance between the light source and the light transmission plane medium is adjusted using the height adjustment device. Next, the light source is connected to the detection power supply and turned on. Finally, the transmitted light, after diffuse transmission of the emitted light from the light source, is received on the upper surface of the light transmission plane medium. The colorimetric detection of the light source is completed by observing the transmitted light.

[0051] The distance between the light source to be tested and the light-transmitting plane medium ranges from 0 to 15 cm (the distance between the light-transmitting plane medium and the surface directly above the light source). This distance can be adjusted according to the brightness of the light source. For light sources with high brightness, the distance can be adjusted further; for light sources with low brightness, the distance can be adjusted closer, as long as it ensures that light is transmitted through the light-transmitting plane medium for easy observation. The specific form of the height adjustment device is not limited here; any device capable of adjusting the height in the vertical direction is acceptable, and internal adjustments can be made using components such as sliding rails or springs. Of course, in other embodiments, the height adjustment device can also be moved horizontally to adjust the light source to a suitable horizontal position.

[0052] To further improve the accuracy of light color comparison, the above embodiment is improved. In step S50 of this embodiment, which involves comparing the light colors of multiple light sources based on the transmitted light from different light sources, the following is included:

[0053] The S51 captures the aperture pattern projected onto a light-transmitting plane medium from a light-emitting light source;

[0054] The S52 detects the RGB values ​​at different locations on the captured aperture map;

[0055] The S53 performs color matching of multiple light sources based on the RGB values ​​at the same location in different aperture diagrams.

[0056] In this embodiment, because the aperture image is diffusely reflected by the light-transmitting plane medium, the light color of the inner and outer rings in the aperture image is more uniform than that of the traditional method of directly transmitting light onto the wall (the center point of the aperture image directly transmitted onto the wall is generally white, which is significantly different from the outer ring light color). Moreover, the center position is no longer white, which facilitates the subsequent comparison of light colors between different light sources in the light color detection device. The RGB value at the center position can be directly selected for measurement and comparison to achieve the purpose of the invention.

[0057] In step S51, the image can be taken using a camera, mobile phone, tablet computer, or other imaging device; no specific limitation is made here. Furthermore, the imaging device can be fixed above the light-transmitting plane medium in any way, such as a stand, as long as the aperture diagrams of different light sources are captured on the same horizontal plane.

[0058] In step S52, the RGB values ​​at different locations on the aperture map can be detected using a color detection device such as a PC or mobile phone. An RGB value detection application (such as image processing software like Photoshop) can be configured within the device to detect the RGB values ​​at each point on the aperture map. When comparing the colors of different light sources, the RGB values ​​at the same location on the aperture map for each light source are detected and compared. For ease of operation, the RGB values ​​at the center of the aperture map can be directly selected for detection.

[0059] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for comparing the color of a light source, characterized in that, The light source color comparison method includes: Provide multiple light sources for comparison; Connect the plurality of light sources to be compared to the detection power supply and place them below the light transmission plane medium; Light up the plurality of light sources to be compared; The transmitted light, after diffuse transmission of the emitted light from the light source, is received on the upper surface of the light-transmitting plane medium. The color comparison of multiple light sources is completed based on the transmitted light from different light sources; The process of comparing the light colors of multiple light sources based on the transmitted light from different light sources includes: The aperture pattern of the light source projected onto the light-transmitting plane medium is photographed; Detect the RGB values ​​at different locations on the captured aperture map; This method compares the color of light from multiple light sources based on the RGB values ​​at the same location in different aperture diagrams.

2. The light color comparison method for a light source as described in claim 1, characterized in that, Connecting the plurality of light sources to be compared to the detection power supply and placing them below the light-transmitting plane medium includes: The plurality of light sources to be compared are connected to the detection power supply and placed sequentially inside the hollow light blocking component and below the light transmission plane medium, wherein the light source and the light blocking component are configured in a one-to-one correspondence.

3. The light color comparison method for a light source as described in claim 1 or 2, characterized in that, Connecting the plurality of light sources to be compared to the detection power supply and placing them below the light-transmitting plane medium includes: The plurality of light sources to be compared are connected to the detection power supply and placed on the platform of the inner height adjustment device below the light transmission plane medium. The distance between the light source and the light-transmitting plane medium is adjusted by a height adjustment device.

4. The light color comparison method for a light source as described in claim 3, characterized in that, The distance between the light source to be compared and the light-transmitting plane medium is 0 to 15 cm, or the interval between the light sources is 0.5 to 5 cm.

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