Color matching experiment device based on laser display technology and method thereof

Abstract

The invention relates to the technical field of optical systems, and discloses a color matching experiment device and method based on a laser display technology, and the device comprises an equipment main body, a projection wall, a light source assembly, a separation plate, a control assembly and the like. According to the invention, the laser light source with high saturation is adopted, so that the number of synthesizable colors and the matching precision are greatly improved. Due to the characteristics of high brightness, high directivity and high saturation of the laser, the laser display has the remarkable advantage of large color gamut, the presented color is bright, and the color distinction degree of different color levels in the same tone direction is high. When the method is applied to a color matching experiment, a color perception threshold value during watching by human eyes can be improved, and more accurate color matching is realized. Meanwhile, due to the fact that the laser is high in stability, current adjusting precision and PWM adjusting precision, the color coordinate variable quantity of the corresponding color can be accurate to three decimal positions after the decimal point during adjustment and is close to the human eye distinguishing limit, and the laser has the excellent effect when a color matching experiment is carried out and the color matching principle is displayed.

Description

Technical Field

[0001] The invention relates to the technical field of optical systems, and in particular to a color matching experimental device and a method thereof based on laser display technology. Background Art

[0002] Color matching experiments generally refer to a series of experiments used in visual perception research to determine how different colors are perceived and compared by the human visual system. These experiments can be used in psychology, color science, design, and many other fields. The following are some common types of color matching experiments: chromaticity matching experiments, color mixing experiments, color contrast experiments, color constancy experiments, color vision deficiency experiments, color preference experiments, color memory experiments, etc.

[0003] like Figure 1 As shown in the figure, the most basic CIE color matching process is: under a 2-degree field of view that complies with CIE1931, the color to be matched is set on the left, and the red, green, and blue primary color light sources are set on the right. By adjusting the brightness of the three primary colors, the synthesized color is consistent with the color to be matched on the left. This process is the color matching process.

[0004] For example, an invention patent application with publication number CN113940050A relates to a color matching method on an electronic device. Specifically, a method for color matching by confirming a color rendering device is disclosed. Color reproduction parameters are determined for reference and target color rendering devices. Based on a comparison of the color reproduction parameters of the target color rendering device with the corresponding color reproduction parameters of the reference color rendering device, color matching parameters are determined for the target color rendering device. The color rendering device is confirmed based on the color matching parameters. The color resources of the target color rendering device are configured so that the presentation of a color image on the target color rendering device replicates the presentation of a color image on the reference color rendering device.

[0005] For example, in an invention patent application with application number 200510008414.X, the purpose of the invention is to perform color matching between an input device and an output device in a device having an input device and an output device, so that an ideal color can be reproduced without being affected by the color characteristics of these devices. The solution is: a color matching profile making device uses an input device profile and an output device profile in addition to a color transformation profile that records the color transformation characteristics of an absolute color space to make a color matching profile between the input device and the output device. Since the color transformation profile records the color transformation characteristics of the absolute color space, a color transformation is performed on the image data obtained from the input device that is not affected by the characteristics of the input device. Therefore, by using the method of performing color matching processing using the produced color transformation profile, image data can be output using the color characteristics determined in the absolute color space without being affected by the characteristics of the output device.

[0006] The light source used in the existing color matching experimental device is a wide-spectrum xenon lamp light source + RGB filter or a wide-spectrum three-color LED. However, the use of wide-spectrum light sources such as LEDs has low color saturation, a small range of synthesizable colors, and low color matching accuracy, which greatly affects the effect of color matching experiments.

[0007] SUMMARY OF THE INVENTION

[0008] The technical problem solved by the present invention is that the existing color matching experimental device adopts a wide-spectrum light source, has low color saturation, a small synthesizable color range, and low color matching accuracy, which greatly affects the effect of the color matching experiment.

[0009] The purpose of the present invention can be achieved through the following technical solutions:

[0010] A color matching experimental device based on laser display technology, comprising:

[0011] Equipment body;

[0012] A projection wall, the projection wall is arranged on the top surface of the device body and is arranged perpendicular to the top surface of the device body to form a projection surface;

[0013] Two groups of light source components, each of which includes three monochromatic laser components of red, green and blue, respectively. The light emitted by the laser components is coupled by an X-prism, and then fused into a circular light spot by a DOE. The middle area is then cut out by an aperture diaphragm, and the pattern is dissipated by a rotating diffuser before being irradiated onto the projection surface to form a light spot.

[0014] A separation plate, wherein the separation plate is fixedly disposed between the two groups of light source assemblies;

[0015] A control component, disposed in the device body, for controlling the action of the light source component, includes:

[0016] A main control board, which is used as a control center of the device;

[0017] A power board, connected to the light source assembly, for providing constant current control for the laser components;

[0018] The signal control board is electrically connected to the main control board and the power board respectively, and is used to control the output power of the power board according to the instructions of the main control board.

[0019] In one embodiment of the present invention, the diameter of the light spot projected on the projection surface is 20 cm.

[0020] In one embodiment of the present invention, the separation plate is fixedly connected to the device body and / or the projection wall.

[0021] In one solution of the present invention: a projection screen is provided at the projection wall as a projection surface.

[0022] In one embodiment of the present invention, the top surface of the device body includes a first surface and a second surface, and there is a height difference between the first surface and the second surface.

[0023] In one solution of the present invention: a partition plate is disposed on the top surface of the device body, and the partition plate and the projection wall are enclosed to form two projection spaces corresponding to the light source assemblies respectively.

[0024] In one solution of the present invention: a light source bracket is fixedly disposed on the top surface of the device body, and the light source assembly is fixedly disposed on the light source bracket.

[0025] In one embodiment of the present invention, a touch screen and a speaker are provided on the device body and are respectively connected to the control assembly for communication.

[0026] In one solution of the present invention: a brightness sensor and a color coordinate sensor which are in communication connection with the control component are arranged on the projection wall at the position of the light spot.

[0027] A color matching experimental method based on laser display technology includes the following steps:

[0028] After the device is started, the control components are operated;

[0029] One group of light source components projects a light spot on the projection surface as a color spot to be matched, and another group of light source components projects a light spot on the projection surface as a color matching experimental light spot;

[0030] The main control board of the control assembly receives the operator's instructions, and based on the instructions, sends a signal to the signal control board to adjust the brightness of each laser component in another group of light source assemblies through the power board;

[0031] The brightness sensor and color coordinate sensor respectively collect the brightness data and color coordinate data of the color spot to be matched and the color matching experimental spot, and upload them to the control component for processing. The processing process is as follows:

[0032] The brightness of the two light spots is L1 and L2 respectively, and the color coordinates are (x1, y1) and (x2, y2) respectively. Let ΔL = |L1-L2|, Δx = |x1-x2|, ΔL = |y1-y2|, then the error of the two light spots matching is ε = [(ΔL) 2 +(Δx) 2 +(Δy) 2 ] / 2, when the feedback data error is less than 1%, it is determined to be a successful match.

[0033] A color matching experimental device and method based on laser display technology according to the present invention has at least one of the following technical effects:

[0034] (1) The present invention utilizes the high brightness and high saturation characteristics of lasers, can provide higher brightness and a wider color gamut, and can express colors more vividly and clearly, thereby increasing the number of matchable colors and improving matching accuracy.

[0035] (2) The life of the laser is up to 30,000 hours, which is much longer than that of traditional light sources, and it also has the advantages of energy saving and environmental protection. The present invention adopts an integrated design, which integrates various components in the design, making the overall structure more compact and more functional. This integrated design can improve efficiency, save space, and simplify the production process.

[0036] (3) The present invention can enhance the user's understanding of color and can be widely popularized or used for other purposes of color synthesis.

[0037] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0039] Figure 1 It is a schematic diagram of the existing CIE color matching process;

[0040] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0041] Figure 3 It is a schematic diagram of the principle of color matching of the present invention;

[0042] Figure 4 It is a structural schematic diagram of the control component of the present invention.

[0043] The reference numerals in the figure are: 1. Equipment body; 2. Projection wall; 3. Light source assembly; 4. Separation board; 5. Main control board; 6. Power board; 7. Signal control board; 8. Touch screen. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0047] See also Figure 2-4 The present invention provides a color matching experimental device based on laser display technology and a method thereof, which can be applied in the form of color matching experiments, color matching popular science, and color matching games, etc. The color matching experimental device based on laser display technology includes a device body 1, a projection wall 2, a light source component 3, a separation plate 4, and a control component, etc.

[0048] See also Figure 2-4 It can be understood that the projection wall 2 is fixedly arranged on the top surface of the device body 1 and is arranged vertically with the top surface of the device body 1 to form a projection surface, which is used to present an image; the projection wall 2 can be formed by a plate structure fixedly connected to the top surface of the device body 1, and a plurality of partitions are arranged on the top surface of the device body 1, and the partitions and the projection wall 2 are enclosed to form two projection spaces corresponding to the light source assemblies 3 respectively. The projection space is opened on one side facing the light source to facilitate the user to observe the light spot. As another optional example, the top surface of the device body 1 can also include a first surface and a second surface, and there is a height difference between the first surface and the second surface. The connecting surface between the first surface and the second surface is perpendicular to the top surface of the device body 1 to form a projection surface for irradiating the light spot. The top surface of the device body 1 is provided with a separation plate 4, which is fixedly arranged at a position between the two groups of light source assemblies 3; the separation plate 4 is used to prevent different laser beams from affecting each other. The separation plate 4 is fixedly connected to the device body 1 and / or the projection wall 2. That is, the bottom of the separation plate 4 is fixedly connected to the top surface of the device body 1 and / or the side of the separation plate 4 is fixedly connected to the projection wall 2. The projection wall 2 may also be provided with a projection screen as a projection surface to ensure the projection irradiation effect of the light spot.

[0049] See also Figure 2-4In one embodiment of the present invention, two groups of light source components 3 are provided, one group of light source components 3 is used to emit the color to be matched, and is used to give a reference color. It is convenient for the experimenter to make a comparison reference. One group of light source components 3 is used to emit independently controllable RGB matching colors. The experimenter can achieve different color changes by adjusting the interactive buttons and / or dials. In order to match the color to be matched, thereby forming a color matching process. Each of the light source components 3 includes three monochromatic laser components of red, green and blue, respectively. The light emitted by the laser components is coupled by an X-prism, and then fused into a circular light spot by DOE, and then the middle area is cut out by an aperture diaphragm, and the pattern is dissipated by a rotating diffuser and then irradiated on the projection surface to form a light spot; by changing the power of the three laser components of different colors, and then adjusting their brightness to change the ratio of different colors, finally achieving the emission of light beams of different colors. The diameter of the light spot projected on the projection surface by the light source component 3 can be 20 cm. The top surface of the device body 1 can be fixedly provided with a light source bracket, and the light source component 3 can be fixedly provided on the light source bracket.

[0050] See also Figure 2-4 In one embodiment of the present invention, the device body 1 is provided with a touch screen 8 and a speaker which are respectively connected to the control component for communication. The touch screen 8 is used to display the operation interface and provide interactive operation. The speaker is used to play the voice of the commentary. The control component is arranged in the device body 1, and is used to control the action of the light source component 3. The control component includes: a main control board 5, a power board 6 and a signal control board 7. The main control board 5 is used as the control center of the device; it is used to drive the display, drive the speaker, and control the overall logic control of the color matching experiment. The power board 6 is used as the power board 6 of the laser, and is connected to the light source component 3 to provide constant current control for the laser components; the signal control board 7 is electrically connected to the main control board 5 and the power board 6 respectively, and is used to drive the laser power board 6 to achieve refined control. That is, it is used to control the output power of the power board 6 according to the instructions of the main control board 5.

[0051] See also Figure 2-4 In one embodiment of the present invention, a brightness sensor and a color coordinate sensor are provided on the projection wall 2 at the position of the light spot and are in communication with the control component. The brightness sensor and the color coordinate sensor are used to collect the brightness data and the color coordinate data of the two imaging light beams respectively and upload them to the control center, thereby forming an accurate color automatic measurement and feedback system, thereby ensuring the accuracy of color matching. Preferably, the brightness sensor and the color coordinate sensor are provided at the center of the light spot irradiated by the laser to ensure the accuracy of information collection.

[0052] See also Figure 2-4In one embodiment of the present invention, the color matching experimental device is provided with an automatic feedback system, which uses brightness and color coordinate detection sensors to provide real-time feedback on the brightness and color coordinates of the light spots emitted by the RGB laser of the color to be matched and the independently controllable RGB matching color laser, and performs real-time comparison. The brightness on the left and right sides are L1 and L2, respectively, and the color coordinates are (x1, y1) and (x2, y2), respectively. Let ΔL = |L1-L2|, Δx = |x1-x2|, ΔL = |y1-y2|, then the matching error is ε = [(ΔL) 2 +(Δx) 2 +(Δy) 2 ] / 2. When the experimenter's eyes cannot distinguish the color difference between the left and right colors, or the feedback data error is less than 1%, it can be determined that the match is successful.

[0053] A color matching experimental method based on laser display technology includes the following steps:

[0054] After the device is started, the control components are operated;

[0055] One group of light source components 3 projects a light spot on the projection surface as a color light spot to be matched, and another group of light source components 3 projects a light spot on the projection surface as a color matching experimental light spot;

[0056] The main control board 5 of the control assembly receives the operator's instruction, and based on the instruction, sends a signal to the signal control board 7, and adjusts the brightness of each laser component in another group of light source assemblies 3 through the power board 6;

[0057] The brightness sensor and color coordinate sensor respectively collect the brightness data and color coordinate data of the color spot to be matched and the color matching experimental spot, and upload them to the control component for processing. The processing process is as follows:

[0058] The brightness of the two light spots is L1 and L2 respectively, and the color coordinates are L1 and L2 respectively, and the color coordinates are (x1, y1) and (x2, y2) respectively. Let ΔL = |L1-L2|, Δx = |x1-x2|, ΔL = |y1-y2|, then the matching error is ε = [(ΔL) 2 +(Δx) 2 +(Δy) 2 ] / 2, when the feedback data error is less than 1%, it is determined to be a successful match. Furthermore, the experimenter can be scored by calculating the difference between the error ε of the matching of the two light spots in actual use and the standard value (such as 1%) to improve the experimenter's experience.

[0059] The criterion for judging success can also be that when the experimenter's eyes cannot distinguish the color difference between the left and right colors, the judgment is successful. The range of color difference values ​​that the human eye can distinguish can use the ΔE value in the CIELAB color space to represent the difference between the two colors. The smaller the ΔE value, the smaller the difference between the two colors, and the more difficult it is for the human eye to distinguish; the larger the ΔE value, the more obvious the difference, and the easier it is for the human eye to distinguish. For the average human eye, when the color difference ΔE value is less than 2.325 or the single eye color difference ΔE value is less than 2.3 under certain conditions, the color difference may be difficult to detect. Therefore, the color difference ΔE value of 2.3 can be used as a threshold, and whether the actual color difference ΔE value between the two light spots is greater than 2.3 can be used as a color difference judgment standard for whether the human eye can distinguish the colors of the two, that is, the standard for whether the color matching experiment is successful.

[0060] Specifically, the application of this application as a color matching experiment game is illustrated below. The color matching experiment process is presented in the form of a game level, and the output current and PWM duty cycle of the laser can be controlled by the touch display screen to change the laser power corresponding to the matching color to achieve mixed matching of different colors. After the device is started, the system is powered on, the display main control board 5 runs, and the touch screen 8 is driven to display the game interface, and a connection is established with the signal control board 7 at the first time. The experiencer clicks the game button in the touch screen 8 to enter the color matching experiment game. The display main control board 5 will detect the game button information clicked in the experience in real time, and send it to the signal control board 7 in real time according to the set game logic. The signal control board 7 will adjust the power supply of the power board 6 of the laser in real time according to the issued instructions, so that the RGB laser of the color to be matched and the independently controllable RGB matching color laser present different colors on the wall or projection screen. Finally, the corresponding score is given according to the actual feedback of the experiencer.

[0061] The present invention adopts a high-saturation laser light source, which greatly improves the number of synthesizable colors and matching accuracy. The high brightness, high directionality and high saturation characteristics of the laser make the laser display have a significant advantage of a large color gamut, the colors presented are bright, and the color distinction of different color levels in the same hue direction is high. Applying it to color matching experiments can increase the color perception threshold of the human eye when viewing and achieve more accurate color matching. At the same time, due to the high stability of the laser, its current regulation accuracy and PWM regulation accuracy are high. The color coordinate change of the corresponding color during adjustment can be accurate to three decimal places, which is close to the resolution limit of the human eye. It has excellent effects in conducting color matching experiments and demonstrating the principle of color matching.

[0062] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of application of the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A color matching experimental device based on laser display technology, characterized in that: include: Equipment body; A projection wall, the projection wall is arranged on the top surface of the device body and is arranged perpendicular to the top surface of the device body to form a projection surface; Two groups of light source components, each of which includes three monochromatic laser components of red, green and blue, respectively. The light emitted by the laser components is coupled by an X-prism, and then fused into a circular light spot by a DOE. The middle area is then cut out by an aperture diaphragm, and the pattern is dissipated by a rotating diffuser before being irradiated onto the projection surface to form a light spot. A separation plate, wherein the separation plate is fixedly disposed between the two groups of light source assemblies; A control component, disposed in the device body, for controlling the action of the light source component, includes: A main control board, which is used as a control center of the device; A power board, connected to the light source assembly, is used to provide constant current control for the laser components; The signal control board is electrically connected to the main control board and the power board respectively, and is used to control the output power of the power board according to the instructions of the main control board.

2. According to claim 1, a color matching experimental device based on laser display technology is characterized in that: The diameter of the light spot projected on the projection surface is 20 cm.

3. The color matching experimental device based on laser display technology according to claim 1 is characterized in that: The separation plate is fixedly connected to the device body and / or the projection wall.

4. The color matching experimental device based on laser display technology according to claim 3 is characterized in that: The projection wall is provided with a projection screen as a projection surface.

5. The color matching experimental device based on laser display technology according to claim 4 is characterized in that: The top surface of the device body includes a first surface and a second surface, and there is a height difference between the first surface and the second surface.

6. The color matching experimental device based on laser display technology according to claim 5 is characterized in that: A partition plate is arranged on the top surface of the device body, and the partition plate and the projection wall are enclosed to form two projection spaces corresponding to the light source components respectively.

7. The color matching experimental device based on laser display technology according to claim 1 is characterized in that: A light source bracket is fixedly arranged on the top surface of the equipment body, and the light source assembly is fixedly arranged on the light source bracket.

8. The color matching experimental device based on laser display technology according to claim 1 is characterized in that: The device body is provided with a touch screen and a sound system which are respectively connected to the control assembly for communication.

9. The color matching experimental device based on laser display technology according to claim 8 is characterized in that: A brightness sensor and a color coordinate sensor which are in communication connection with the control component are arranged on the projection wall at the position of the light spot.

10. A color matching experimental method based on laser display technology, characterized in that: The steps include: After the device is started, the control components are operated; One group of light source components projects a light spot on the projection surface as a color spot to be matched, and another group of light source components projects a light spot on the projection surface as a color matching experimental light spot; The main control board of the control assembly receives the operator's instructions, and based on the instructions, sends a signal to the signal control board to adjust the brightness of each laser component in another group of light source assemblies through the power board; The brightness sensor and color coordinate sensor respectively collect the brightness data and color coordinate data of the color spot to be matched and the color matching experimental spot, and upload them to the control component for processing. The processing process is as follows: The brightness of the two light spots is L1 and L2 respectively, and the color coordinates are (x1, y1) and (x2, y2) respectively. Let ΔL = |L1-L2|, Δx = |x1-x2|, ΔL = |y1-y2|, then the error of the two light spots matching is ε = [(ΔL) 2 +(Δx) 2 +(Δy) 2 ] / 2, when the feedback data error is less than 1%, it is determined to be a successful match.

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