Light-emitting bumper light distribution design method, device and equipment and readable storage medium

Abstract

The invention discloses a light distribution design method, device and equipment for a light-emitting bumper and a readable storage medium, and relates to the field of vehicles. The light-emitting bumper is sprayed with target colored paint with the same color as a whole vehicle, and a light-shielding primer layer of the light-emitting bumper has a laser engraving area; determining a compensated target three-primary-color ratio according to the three-primary-color ratio corresponding to the original white light and the original three-primary-color ratio of the light-emitting bumper light source under the target colored paint before compensation; determining compensated target brightness based on the light transmittance of the target colored paint and a brightness threshold; the number of target lamp beads needing to be arranged in the laser engraving area is calculated according to the area of the laser engraving area, the target brightness and the included angle and distance between the light source and the light-emitting bumper; determining a target color coordinate of the light source according to the target brightness, the target three-primary color proportion and the target lamp bead number; and the light source is controlled based on the target brightness and the target color coordinates, so that the light-emitting bumper emits pure white light, the same color of the whole vehicle body can be achieved when the vehicle body is not lightened, and the light color requirement of the national standard for lightening is met.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method, device, equipment and readable storage medium for designing the light distribution of a luminous bumper. Background Art

[0002] The automotive industry is developing rapidly in the direction of the new "four modernizations", which has led to the rapid iteration of new models. In order to reflect the brand effect, car companies often combine intelligence and networking with exterior trims; among them, the luminous bumper in the exterior trim has become one of the technical routes to reflect brand technology and differentiation.

[0003] For the luminous bumpers in mass-produced models currently on the market, in order to achieve the luminous function, the entire paint layer is usually carved away to reveal the skin substrate, but when it is not lit, there is no paint, that is, it is black, so that the function of the same color of the entire body cannot be achieved; and in some solutions to achieve the same color of the entire body, the entire paint layer will not be carved away, but when it is lit, there will be a problem of paint dyeing the light, resulting in impure light color, and thus unable to meet the requirements of the national standard GB4785-2019, and thus cannot pass the regulatory certification. Therefore, how to achieve the same color of the entire body when the luminous bumper is not lit, and at the same time meet the national standard GB4785-2019 requirements for the light color of the luminous bumper when it is lit is a problem that needs to be solved urgently. Summary of the invention

[0004] The present application provides a method, device, equipment and readable storage medium for designing the lighting distribution of a luminous bumper, which can achieve the same color of the entire vehicle body when the luminous bumper is not lit, and at the same time meet the national standard GB4785-2019 for the light color requirements of the luminous bumper when it is lit.

[0005] In a first aspect, an embodiment of the present application provides a method for designing a light distribution of a luminous bumper, wherein the luminous bumper is sprayed with a target color paint that is the same as the color of the entire vehicle and a light-shielding primer layer has a laser engraving area, and the method comprises:

[0006] Determine a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper when passing through the target color paint;

[0007] Determine the compensated target brightness based on the total light transmittance corresponding to the target color paint and a preset brightness threshold;

[0008] The target number of lamp beads required to be set in the laser engraving area is calculated according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper;

[0009] Determine the target color coordinates of the light source according to the target brightness, the target three primary color ratio and the target number of lamp beads;

[0010] The light source is controlled based on the target brightness and the target color coordinates so that the illuminated bumper emits pure white light.

[0011] In combination with the first aspect, in one embodiment, determining the compensated target three-primary color ratio according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint includes:

[0012] Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation;

[0013] The first calculation formula is:

[0014]

[0015] In the formula, (r 2 ,g 2 ,b 2 ) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, (r 1 ,g 1 ,b 1 ) represents the original three primary color ratio.

[0016] In combination with the first aspect, in one embodiment, the target number of lamp beads required to be set in the laser engraving area is calculated according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper, including:

[0017] Calculating a target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness;

[0018] Calculate the brightness of the laser engraving area according to the target luminous flux, the angle and distance between the light source and the luminous bumper;

[0019] The target number of lamp beads required to be set in the laser engraving area is determined by the brightness of the laser engraving area.

[0020] In combination with the first aspect, in one implementation, the calculating the target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness includes:

[0021] Substituting the area of ​​the laser engraving area and the target brightness into a second calculation formula to obtain a target luminous flux in the laser engraving area;

[0022] The second calculation formula is:

[0023] I=E 1 A

[0024] In the formula, I represents the target luminous flux, E 1 represents the target brightness, and A represents the area of ​​the laser engraving area.

[0025] In combination with the first aspect, in one embodiment, the brightness of the laser engraving area is calculated according to the target luminous flux, the angle and the distance between the light source and the light-emitting bumper, including:

[0026] Substituting the target luminous flux, the angle and the distance between the light source and the light-emitting bumper into the third calculation formula to obtain the brightness of the laser engraving area;

[0027] The third calculation formula is:

[0028]

[0029] Wherein, E' represents the brightness of the laser engraving area, I represents the target luminous flux, a represents the angle between the light source and the light-emitting bumper, and d represents the distance between the light source and the light-emitting bumper.

[0030] In combination with the first aspect, in one embodiment, the luminous bumper includes a bumper body, a transparent primer layer, a light-shielding primer layer, a target color paint layer and a transparent varnish layer in sequence, wherein the light-shielding primer layer includes a laser engraving area.

[0031] In a second aspect, an embodiment of the present application provides a light distribution design device for a luminous bumper, wherein the luminous bumper is sprayed with a target color paint that is the same as the color of the entire vehicle and its light-shielding primer layer has a laser engraving area, and the device comprises:

[0032] A first determination module is used to determine a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint;

[0033] A second determination module, which is used to determine the compensated target brightness based on the total light transmittance corresponding to the target paint and a preset brightness threshold;

[0034] A third determination module is used to calculate the target number of lamp beads required to be set in the laser engraving area according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper;

[0035] A fourth determination module is used to determine the target color coordinates of the light source according to the target brightness, the target three primary color ratio and the target number of lamp beads;

[0036] The light source control module is used to control the light source based on the target brightness and the target color coordinates so that the light-emitting bumper emits pure white light.

[0037] In conjunction with the second aspect, in one implementation, the first determining module is specifically configured to:

[0038] Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation;

[0039] The first calculation formula is:

[0040]

[0041] In the formula, (r 2 ,g 2 ,b 2 ) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, (r 1 ,g 1 ,b 1 ) represents the original three primary color ratio.

[0042] In conjunction with the second aspect, in one implementation, the third determining module is specifically configured to:

[0043] Calculating a target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness;

[0044] Calculate the brightness of the laser engraving area according to the target luminous flux, the angle and distance between the light source and the luminous bumper;

[0045] The target number of lamp beads required to be set in the laser engraving area is determined by the brightness of the laser engraving area.

[0046] In conjunction with the second aspect, in one implementation, the third determining module is further configured to:

[0047] Substituting the area of ​​the laser engraving area and the target brightness into a second calculation formula to obtain a target luminous flux in the laser engraving area;

[0048] The second calculation formula is:

[0049] I=E 1 A

[0050] Where I represents the target luminous flux, E 1 represents the target brightness, and A represents the area of ​​the laser engraving area.

[0051] In conjunction with the second aspect, in one implementation, the third determining module is further configured to:

[0052] Substituting the target luminous flux, the angle and the distance between the light source and the light-emitting bumper into the third calculation formula to obtain the brightness of the laser engraving area;

[0053] The third calculation formula is:

[0054]

[0055] Wherein, E' represents the brightness of the laser engraving area, I represents the target luminous flux, a represents the angle between the light source and the light-emitting bumper, and d represents the distance between the light source and the light-emitting bumper.

[0056] In combination with the second aspect, in one embodiment, the luminous bumper includes a bumper body, a transparent primer layer, a light-shielding primer layer, a target color paint layer and a transparent varnish layer in sequence, wherein the light-shielding primer layer includes a laser engraving area.

[0057] In a third aspect, an embodiment of the present application provides a device for designing the light distribution of a luminous bumper, the device comprising a processor, a memory, and a light distribution design program for a luminous bumper stored in the memory and executable by the processor, wherein when the light distribution design program for a luminous bumper is executed by the processor, the steps of the light distribution design method for a luminous bumper as described above are implemented.

[0058] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a light-emitting bumper lighting design program is stored, wherein when the light-emitting bumper lighting design program is executed by a processor, the steps of the light-emitting bumper lighting design method as described above are implemented.

[0059] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0060] The target color paint of the same color as the whole vehicle is sprayed on the luminous bumper by controlling the luminous bumper to ensure that the same color function of the whole vehicle body can be achieved when the luminous bumper is not lit; at the same time, in order to ensure that the luminous bumper can emit pure white light, light color compensation will be performed to eliminate the dyeing effect of the paint layer, that is, the target three primary color ratio after compensation is determined according to the three primary color ratio corresponding to the original white light and the original three primary color ratio before compensation corresponding to the light source of the luminous bumper under the target color paint; then the target brightness after compensation is determined based on the total light transmittance corresponding to the target color paint and the preset brightness threshold, and the target number of lamp beads required to be set in the laser engraving area is calculated by the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the luminous bumper; then the target color coordinates of the light source are determined according to the target brightness, the target three primary color ratio and the target number of lamp beads, and finally the light source is controlled based on the target brightness and the target color coordinates, so that the light color compensation can be completed so that the luminous bumper emits pure white light. It can be seen that the present application can achieve the same color of the entire vehicle body when the luminous bumper is not lit, and at the same time meet the national standard GB4785-2019 for the light color requirements when the luminous bumper is lit. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 A schematic diagram of a flow chart of an embodiment of a method for designing the light distribution of a luminous bumper according to the present application;

[0062] Figure 2 This is a schematic diagram of the structure of the luminous safety rod involved in the embodiment of the present application;

[0063] Figure 3 This is a functional module diagram of an embodiment of the luminous bumper light distribution design device of the present application;

[0064] Figure 4 The figure is a schematic diagram of the hardware structure of the luminous bumper light distribution design device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0066] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0067] In a first aspect, an embodiment of the present application provides a method for designing light distribution of a luminous bumper.

[0068] In one embodiment, referring to Figure 1 , Figure 1 The flowchart of the embodiment of the light-emitting bumper light distribution design method of the present application is shown in FIG. The light-emitting bumper is sprayed with a target color paint of the same color as the whole vehicle and its light-shielding primer layer has a laser engraving area; it should be noted that in this embodiment, in order to ensure that the paint sprayed on the light-emitting bumper can be the same color as the whole vehicle body when the light-emitting bumper is not lit, the target color paint of the same color as the whole vehicle body is sprayed on the light-emitting bumper, so that when the light-emitting bumper is not lit, the target color paint presented on it can achieve the function of being the same color as the whole vehicle body; at the same time, the light-shielding primer layer of the light-emitting bumper is partially engraved to form a laser engraving area, so that the light-emitting function can be achieved through the laser engraving area.

[0069] Furthermore, in one embodiment, the luminous bumper comprises a bumper body, a transparent primer layer, a light-shielding primer layer, a target color paint layer and a transparent clear coat layer in sequence, wherein the light-shielding primer layer comprises a laser engraving area.

[0070] Exemplarily, in this embodiment, the following process route can be adopted to realize the preparation of the luminous bumper to obtain Figure 2 The light-emitting bumper shown in the figure: (1) firstly, the bumper body is formed by injection molding of a transparent material (i.e., injection molding of a light-transmitting substrate layer); (2) a transparent primer is sprayed on the A surface of the bumper body (i.e., the outer surface of the bumper body) to form a transparent primer layer; (3) a light-shielding primer is sprayed on the A surface of the bumper body and baked to form a light-shielding primer layer; (4) according to the light-emitting requirements of the bumper, the light-shielding primer in a part of the upper area of ​​the light-shielding primer layer is laser engraved to obtain a laser engraving area; (5) a target color paint (which is a light-transmitting paint) is sprayed on the A surface of the bumper body to form a target color paint layer (i.e., a light-transmitting vehicle body color paint layer); (6) finally, a clear varnish is sprayed on the A surface of the bumper body and baked to form a transparent clear varnish layer. It is understood that the assembly of the lamp (i.e., LED matrix light source, self-sealing) used to realize the light-emitting of the bumper and the sealing strip sealing method and principle are common knowledge in the art, so for the sake of brevity of description, they are not repeated here.

[0071] like Figure 1 As shown, the light distribution design method of the luminous bumper includes the following steps:

[0072] Step S10: determining a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the illuminated bumper passing through the target color paint.

[0073] Exemplarily, it should be understood that since the paint component is a pigment, the light will be dyed after passing through the target color paint, so this embodiment will eliminate the dyeing effect of the paint layer by performing light color compensation. Specifically, this embodiment can spray small samples of different colors of body paint in advance according to the requirements of mass production of the bumper. The paint hue difference DH, chroma difference DC and brightness difference DL of the small samples all meet the requirements of mass-produced vehicles; secondly, in order to meet the white light matching of the national standard GB4785-2019, the light emitted by the luminous bumper when it is lit is required to be pure white, so it is necessary to obtain the three primary color ratios and color coordinates (x, y) corresponding to the pure white light (i.e., original white light) (the color coordinates (x, y) are the median (0.325, 0.325) required by the color coordinates in GB4785-2019) ) and brightness E. It can be understood that the ratio of the three primary colors refers to the ratio of red, green and blue, and the ratio of the three primary colors corresponding to pure white light is red r=33.3%, green g=33.3% and blue b=33.4%; at the same time, the light source is set according to the median (0.325, 0.325) and brightness required by the color coordinates in GB4785-2019 to test the original three primary color ratio corresponding to the small samples with different colors of body paint, that is, the original three primary color ratio is the ratio before light color compensation, that is, the three primary color ratio corresponding to the light source directly passing through the small sample.

[0074] For example, the car body paint color corresponding to sample A is nuclear gray. After preliminary experiments, it can be obtained that when the light source passes through sample A, the original three primary color ratios A1 are red, r 1 =22.0%, green g 1 =31.5% and blue b 1 =40.5%; the body paint color corresponding to sample B is ceramic white. After preliminary experiments, it can be obtained that when the light source passes through sample B, the original three primary color ratios B1 are red, r 1 =38.4%, green g 1 =34.2% and blue b 1 =27.4%; the body paint color corresponding to sample C is mirror gold, then through preliminary experiments, it can be obtained that when the light source passes through sample C, the original three primary color ratios C1 are red, r 1 =36.6%, green g 1 =34.1% and blue b 1 =29.3%.

[0075] It can be understood that after completing the preliminary experiments on all samples with different colors of body paint and obtaining the original three primary color ratios corresponding to the samples with different colors of body paint, a three primary color ratio library can be constructed based on the mapping relationship between each sample and its corresponding original three primary color ratio; for example, the three primary color ratio library is used to store the mapping relationship between the nuclear gray corresponding to sample A and the original three primary color ratio A1, the mapping relationship between the ceramic white corresponding to sample B and the original three primary color ratio B1, the mapping relationship between the mirror gold corresponding to sample C and the original three primary color ratio C1, etc.

[0076] Therefore, when it is necessary to design the lighting distribution for a light-emitting bumper having a target paint color (that is, a color value that constitutes the vehicle body shape, which is a fixed value), the original three-primary color ratio corresponding to the target paint color can be screened out from the three-primary color ratio library. For example, if the target paint color is nuclear gray, the original three-primary color ratio A1 is used as the original three-primary color ratio before compensation corresponding to the light source when passing through the target paint color; then the target three-primary color ratio after compensation is determined by the original three-primary color ratio before compensation and the three-primary color ratio corresponding to the original white light, so as to realize light color compensation through the target three primary colors.

[0077] Further, in one embodiment, the method of determining the compensated target three-primary color ratio according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint comprises:

[0078] Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation;

[0079] The first calculation formula is:

[0080]

[0081] In the formula, (r 2 ,g 2 ,b 2 ) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, (r 1 ,g 1 ,b 1 ) represents the original three primary color ratio.

[0082] Exemplarily, in this embodiment, the formula for determining the target three primary color ratio after compensation can be obtained by the Grassmann color mixing principle:

[0083]

[0084] Among them, (r 2 ,g 2 ,b 2 ) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, (r 1 ,g 1 ,b 1 ) represents the original three-primary color ratio; therefore, the target three-primary color ratio after compensation can be determined based on the above formula and the three-primary color ratio of the original white light and the original three-primary color ratio before compensation corresponding to the light source when passing through the target color paint; for example, taking the target color paint as nuclear energy gray as an example, the three-primary color ratio of the original white light: r = 33.3%, g = 33.3% and b = 33.4% and the original three-primary color ratio of the light source when passing through the nuclear energy gray: r 1 =22.0%, g 1 =31.5% and b 1 =40.5% Substituting into the above formula, we get:

[0085]

[0086] Therefore, the target three primary color ratio after compensation can be calculated as r 2 =44.6%, g 2 =35.1% and b 2 =26.3%.

[0087] Step S20: determining the compensated target brightness based on the total light transmittance corresponding to the target paint color and a preset brightness threshold.

[0088] For example, it should be noted that the total light transmittance T of the light-emitting bumper with different paint colors is known, which can be measured by the light transmittance T of the lamp housing. 1, light transmittance T of the luminous bumper body 2 and the transmittance T of the luminous bumper paint layer 3 Calculated, that is, T = T 1 ·T 2 ·T 3 100%; for example, if the paint color of the illuminated bumper is nuclear gray, the corresponding total light transmittance is 6.2%, if the paint color of the illuminated bumper is ceramic white, the corresponding total light transmittance is 9.28%, and if the paint color of the illuminated bumper is mirror gold, the corresponding total light transmittance is 7.55%. In addition, the specific value setting of the brightness threshold required for the illuminated bumper can be determined according to the brightness of the light ring where the illuminated bumper is located, and is not limited here.

[0089] In this embodiment, the total light transmittance of the target color paint of the luminous bumper can be determined, and then the compensated target brightness is calculated by the ratio of the brightness threshold to the total light transmittance. The compensated target brightness is the minimum brightness that the light source in the laser engraving area must reach. For example, if the target color paint is nuclear energy gray and the brightness threshold is 800nit, the compensated target brightness = 800 / 6.2% = 12903nit = 12903cd / m 2 .

[0090] Step S30: Calculating the target number of lamp beads required to be arranged in the laser engraving area according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper.

[0091] For example, in this embodiment, for different laser engraving areas, the target number of lamp beads required to be set in the laser engraving area needs to be calculated according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper, that is, the lamp beads need to be deployed in the laser engraving area according to the target number of lamp beads so that the brightness of the light emitted by the formed light source can reach the target brightness after compensation. It should be noted that the area of ​​the laser engraving area, the angle between the light source (i.e., LED lamp) and the light-emitting bumper, and the distance between the light source and the light-emitting bumper are all known values, which can be obtained through actual measurement.

[0092] Furthermore, in one embodiment, the target number of lamp beads required to be set in the laser engraving area is calculated based on the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper, including:

[0093] Calculating a target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness;

[0094] Calculate the brightness of the laser engraving area according to the target luminous flux, the angle and distance between the light source and the luminous bumper;

[0095] The target number of lamp beads required to be set in the laser engraving area is determined by the brightness of the laser engraving area.

[0096] For example, in this embodiment, when calculating the target number of lamp beads, the target luminous flux in the laser engraving area can be calculated first according to the measured area of ​​the laser engraving area and the calculated compensated target brightness; then the brightness of the laser engraving area can be calculated according to the target luminous flux, the angle and distance between the light source and the light-emitting bumper, and finally the target number of lamp beads required to be set in the laser engraving area can be determined based on the brightness of the laser engraving area and the power and luminous flux of each lamp bead. For example, if the brightness of the laser engraving area is 58.5lm, there are LED alternative lamp beads with a power of 0.75w and a luminous flux of 65lm, then the target number of lamp beads required to be set in the laser engraving area is 1; for another example, if the brightness of the laser engraving area is 119.9lm, there are LED alternative lamp beads with a power of 0.75w and a luminous flux of 65lm, then the target number of lamp beads required to be set in the laser engraving area is 2.

[0097] Furthermore, in one embodiment, the calculating the target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness includes:

[0098] Substituting the area of ​​the laser engraving area and the target brightness into a second calculation formula to obtain a target luminous flux in the laser engraving area;

[0099] The second calculation formula is:

[0100] I=E 1 A

[0101] In the formula, I represents the target luminous flux, E 1 represents the target brightness, and A represents the area of ​​the laser engraving area.

[0102] For example, in this embodiment, the target light flux in the laser engraving area can be calculated by converting the compensated target brightness E 1 And the area of ​​the laser engraving area A is substituted into I = E 1 A's formula is used to calculate the target luminous flux I.

[0103] Furthermore, in one embodiment, the brightness of the laser engraving area is calculated according to the target light flux, the angle and the distance between the light source and the light-emitting bumper, including:

[0104] Substituting the target luminous flux, the angle and the distance between the light source and the light-emitting bumper into the third calculation formula to obtain the brightness of the laser engraving area;

[0105] The third calculation formula is:

[0106]

[0107] Wherein, E' represents the brightness of the laser engraving area, I represents the target luminous flux, a represents the angle between the light source and the light-emitting bumper, and d represents the distance between the light source and the light-emitting bumper.

[0108] For example, in this embodiment, the brightness of the laser engraving area can be calculated by substituting the target light flux I, the angle a between the light source and the light-emitting bumper, and the distance d between the light source and the light-emitting bumper into the formula To calculate the brightness E' of the laser engraving area.

[0109] Step S40: Determine the target color coordinates of the light source according to the target brightness, the target ratio of the three primary colors and the target number of lamp beads.

[0110] Exemplarily, in this embodiment, based on the target brightness E 1 And the target three primary color ratio (r 2 ,g 2 ,b 2 ) Set a light source consisting of a target number of lamp beads to measure the target color coordinates (x 1 ,y 1 For example, if the target color paint is nuclear gray, the color coordinates of the light before compensation are (0.2268, 0.2257). After compensation in this embodiment, the target color coordinates of the light (x 1 ,y 1 ) becomes (0.3579, 0.3653); if the target color paint is ceramic white, the color coordinates of the light before compensation are (0.317, 0.325), and after compensation in this embodiment, the target color coordinates of the light (x 1 ,y 1 ) becomes (0.2923, 0.2942); if the target color paint is mirror gold, the color coordinates of the light before compensation are (0.3094, 0.3199), and after compensation in this embodiment, the target color coordinates of the light (x 1 ,y 1 ) becomes (0.3014, 0.3012).

[0111] Step S50: controlling the light source based on the target brightness and the target color coordinates so that the illuminated bumper emits pure white light.

[0112] Exemplarily, in this embodiment, the LED lamps in the light-emitting bumper are driven according to the target brightness and the target color coordinates to realize the light source control, so that the light source emitted by the light-emitting bumper assembly is pure white light, which effectively solves the problem of "staining" of paint. For example, if the target color paint is nuclear energy gray, after compensation by this embodiment, the ratio of the three primary colors of the light source emitted by the light-emitting bumper assembly becomes (33.3%, 33.3%, 33.4%), that is, the light source emitted by the light-emitting bumper assembly is pure white light, and the color coordinates of the light source emitted by the light-emitting bumper assembly become (0.3250, 0.3257). It can be seen that this embodiment can achieve the same color of the entire vehicle body when the light-emitting bumper is not lit, that is, when the light-emitting bumper is not lit, the color it displays is the same as the color of the vehicle body, and at the same time meet the national standard GB4785-2019 for the light color when the light-emitting bumper is lit, that is, when the light-emitting bumper is lit, the light source it emits is pure white light. It should be noted that the present embodiment can be applied not only to luminous bumpers, but also to other exterior trims with luminous functions, such as luminous grilles.

[0113] In a second aspect, an embodiment of the present application further provides a light distribution design device for a luminous bumper.

[0114] In one embodiment, referring to Figure 3 , Figure 3 The illuminating bumper is sprayed with a target color paint that is the same as the color of the whole vehicle, and its light-shielding primer layer has a laser engraving area, such as Figure 3 As shown, the luminous bumper light distribution design device includes:

[0115] A first determination module is used to determine a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint;

[0116] A second determination module, which is used to determine the compensated target brightness based on the total light transmittance corresponding to the target paint and a preset brightness threshold;

[0117] A third determination module is used to calculate the target number of lamp beads required to be set in the laser engraving area according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper;

[0118] A fourth determination module is used to determine the target color coordinates of the light source according to the target brightness, the target three primary color ratio and the target number of lamp beads;

[0119] The light source control module is used to control the light source based on the target brightness and the target color coordinates so that the light-emitting bumper emits pure white light.

[0120] Further, in one embodiment, the first determining module is specifically configured to:

[0121] Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation;

[0122] The first calculation formula is:

[0123]

[0124] In the formula, (r 2 ,g 2 ,b 2 ) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, (r 1 ,g 1 ,b 1 ) represents the original three primary color ratio.

[0125] Furthermore, in one embodiment, the third determining module is specifically configured to:

[0126] Calculating a target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness;

[0127] Calculate the brightness of the laser engraving area according to the target luminous flux, the angle and distance between the light source and the luminous bumper;

[0128] The target number of lamp beads required to be set in the laser engraving area is determined by the brightness of the laser engraving area.

[0129] Furthermore, in one embodiment, the third determining module is further configured to:

[0130] Substituting the area of ​​the laser engraving area and the target brightness into a second calculation formula to obtain a target luminous flux in the laser engraving area;

[0131] The second calculation formula is:

[0132] I=E 1 A

[0133] Where I represents the target luminous flux, E 1 represents the target brightness, and A represents the area of ​​the laser engraving area.

[0134] Furthermore, in one embodiment, the third determining module is further configured to:

[0135] Substituting the target luminous flux, the angle and the distance between the light source and the light-emitting bumper into the third calculation formula to obtain the brightness of the laser engraving area;

[0136] The third calculation formula is:

[0137]

[0138] Wherein, E' represents the brightness of the laser engraving area, I represents the target luminous flux, a represents the angle between the light source and the light-emitting bumper, and d represents the distance between the light source and the light-emitting bumper.

[0139] Furthermore, in one embodiment, the luminous bumper comprises a bumper body, a transparent primer layer, a light-shielding primer layer, a target color paint layer and a transparent clear coat layer in sequence, wherein the light-shielding primer layer comprises a laser engraving area.

[0140] The functions of each module in the above-mentioned device for designing the light distribution of a luminous bumper correspond to the steps in the above-mentioned method for designing the light distribution of a luminous bumper, and their functions and implementation processes are not described one by one here.

[0141] In a third aspect, an embodiment of the present application provides a device for designing the light distribution of a light-emitting bumper. The device for designing the light distribution of a light-emitting bumper may be a device with a data processing function, such as a personal computer (PC), a notebook computer, or a server.

[0142] Reference Figure 4 , Figure 4 The hardware structure diagram of the light distribution design device for a light-emitting bumper involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the light distribution design device for a light-emitting bumper may include a processor, a memory, a communication interface, and a communication bus.

[0143] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0144] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, which are used to interconnect the components in the light-emitting bumper light distribution design device, and an interface used to interconnect the light-emitting bumper light distribution design device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0145] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0146] The processor may be a general-purpose processor, which may call the light-emitting bumper light distribution design program stored in the memory and execute the light-emitting bumper light distribution design method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the light-emitting bumper light distribution design program is called may refer to the various embodiments of the light-emitting bumper light distribution design method of the present application, which will not be described in detail here.

[0147] Those skilled in the art will understand that Figure 4 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0148] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0149] The readable storage medium of the present application stores a light-emitting bumper light distribution design program, wherein when the light-emitting bumper light distribution design program is executed by a processor, the steps of the light-emitting bumper light distribution design method as described above are implemented.

[0150] The method implemented when the light-emitting bumper light distribution design program is executed can refer to the various embodiments of the light-emitting bumper light distribution design method of the present application, and will not be described in detail here.

[0151] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0152] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0153] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0154] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0155] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0156] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0157] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for designing light distribution of a luminous bumper, characterized in that: The luminous bumper is sprayed with a target color paint that is the same as the color of the entire vehicle and its light-shielding primer layer has a laser engraving area, and the method includes: Determine a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper when passing through the target color paint; Determine the compensated target brightness based on the total light transmittance corresponding to the target color paint and a preset brightness threshold; The target number of lamp beads required to be set in the laser engraving area is calculated according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper; Determine the target color coordinates of the light source according to the target brightness, the target three primary color ratio and the target number of lamp beads; The light source is controlled based on the target brightness and the target color coordinates so that the illuminated bumper emits pure white light.

2. The method for designing light distribution of a luminous bumper according to claim 1, characterized in that: The method of determining the target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint comprises: Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation; The first calculation formula is: In the formula, (r2, g2, b2) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, and (r1, g1, b1) represents the original three-primary color ratio.

3. The method for designing light distribution of a luminous bumper according to claim 1, characterized in that: The method of calculating the target number of lamp beads required to be set in the laser engraving area according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper includes: Calculating a target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness; Calculate the brightness of the laser engraving area according to the target luminous flux, the angle and distance between the light source and the luminous bumper; The target number of lamp beads required to be set in the laser engraving area is determined by the brightness of the laser engraving area.

4. The method for designing light distribution of a luminous bumper according to claim 3, characterized in that: The step of calculating the target luminous flux in the laser engraving area based on the area of ​​the laser engraving area and the target brightness includes: Substituting the area of ​​the laser engraving area and the target brightness into a second calculation formula to obtain a target luminous flux in the laser engraving area; The second calculation formula is: E1A Where I represents the target luminous flux, E1 represents the target brightness, and A represents the area of ​​the laser engraving area.

5. The method for designing light distribution of a luminous bumper according to claim 3, characterized in that: The step of calculating the brightness of the laser engraving area according to the target luminous flux, the angle and the distance between the light source and the luminous bumper includes: Substituting the target luminous flux, the angle and the distance between the light source and the light-emitting bumper into the third calculation formula to obtain the brightness of the laser engraving area; The third calculation formula is: Wherein, E' represents the brightness of the laser engraving area, I represents the target luminous flux, a represents the angle between the light source and the light-emitting bumper, and d represents the distance between the light source and the light-emitting bumper.

6. The method for designing light distribution of a luminous bumper according to claim 1, characterized in that: The luminous bumper comprises a bumper body, a transparent primer layer, a light-shielding primer layer, a target color paint layer and a transparent varnish layer in sequence, wherein the light-shielding primer layer comprises a laser engraving area.

7. A light distribution design device for a luminous bumper, characterized in that: The luminous bumper is sprayed with a target color paint that is the same as the color of the entire vehicle and its light-shielding primer layer has a laser engraving area, and the device includes: A first determination module is used to determine a target three-primary color ratio after compensation according to the three-primary color ratio corresponding to the original white light and the original three-primary color ratio before compensation corresponding to the light source of the light-emitting bumper passing through the target color paint; A second determination module, which is used to determine the compensated target brightness based on the total light transmittance corresponding to the target paint and a preset brightness threshold; A third determination module is used to calculate the target number of lamp beads required to be set in the laser engraving area according to the area of ​​the laser engraving area, the target brightness, and the angle and distance between the light source and the light-emitting bumper; A fourth determination module is used to determine the target color coordinates of the light source according to the target brightness, the target three primary color ratio and the target number of lamp beads; The light source control module is used to control the light source based on the target brightness and the target color coordinates so that the light-emitting bumper emits pure white light.

8. The light distribution design device for a luminous bumper according to claim 7, characterized in that: The first determining module is specifically used for: Substituting the ratio of the three primary colors corresponding to the original white light and the original ratio of the three primary colors into a first calculation formula to obtain a target ratio of the three primary colors after compensation; The first calculation formula is: In the formula, (r2, g2, b2) represents the target three-primary color ratio, (r, g, b) represents the three-primary color ratio corresponding to the original white light, and (r1, g1, b1) represents the original three-primary color ratio.

9. A light-emitting bumper light distribution design device, characterized in that: The light-emitting bumper light distribution design device comprises a processor, a memory, and a light-emitting bumper light distribution design program stored in the memory and executable by the processor, wherein when the light-emitting bumper light distribution design program is executed by the processor, the steps of the light-emitting bumper light distribution design method according to any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a light-emitting bumper light distribution design program, wherein when the light-emitting bumper light distribution design program is executed by a processor, the steps of the light-emitting bumper light distribution design method according to any one of claims 1 to 6 are implemented.

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